diff options
386 files changed, 11193 insertions, 5797 deletions
diff --git a/.github/workflows/issue_reviver.yml b/.github/workflows/issue_reviver.yml index f2d584ac0..a6a9b1b4f 100644 --- a/.github/workflows/issue_reviver.yml +++ b/.github/workflows/issue_reviver.yml @@ -1,5 +1,5 @@ # This workflow revives issues that are still referenced in the code, and may -# have been accidentally closed or marked stale. +# have been accidentally closed. name: "Issue reviver" "on": schedule: diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml deleted file mode 100644 index ef13f019f..000000000 --- a/.github/workflows/stale.yml +++ /dev/null @@ -1,22 +0,0 @@ -# The stale workflow closes stale issues and pull requests, unless specific -# tags have been applied in order to keep them open. -name: "Close stale issues" -"on": - schedule: - - cron: "0 0 * * *" - -jobs: - stale: - runs-on: ubuntu-latest - steps: - - uses: actions/stale@v3 - with: - repo-token: ${{ secrets.GITHUB_TOKEN }} - stale-issue-label: 'stale' - stale-pr-label: 'stale' - exempt-issue-labels: 'revived, exported, type: bug, type: cleanup, type: enhancement, type: process, type: proposal, type: question' - exempt-pr-labels: 'ready to pull, exported' - stale-issue-message: 'This issue is stale because it has been open 90 days with no activity. Remove the stale label or comment or this will be closed in 30 days.' - stale-pr-message: 'This pull request is stale because it has been open 90 days with no activity. Remove the stale label or comment or this will be closed in 30 days.' - days-before-stale: 90 - days-before-close: 30 @@ -369,7 +369,8 @@ benchmark-platforms: load-benchmarks $(RUNTIME_BIN) ## Runs benchmarks for runc .PHONY: benchmark-platforms run-benchmark: load-benchmarks $(RUNTIME_BIN) ## Runs single benchmark and optionally sends data to BigQuery. - @$(call run_benchmark,$(RUNTIME)$(BENCH_VFS),$(BENCH_RUNTIME_ARGS) $(BENCH_VFS)) + @if test "$(RUNTIME)" = "runc"; then $(call run_benchmark,$(RUNTIME)); fi; + @if test "$(RUNTIME)" != "runc"; then $(call run_benchmark,$(RUNTIME)$(BENCH_VFS),$(BENCH_RUNTIME_ARGS) $(BENCH_VFS)); fi; .PHONY: run-benchmark ## @@ -1,6 +1,7 @@  [](https://buildkite.com/gvisor/pipeline) +[](https://github.com/google/gvisor/actions/workflows/issue_reviver.yml) [](https://gitter.im/gvisor/community) [](https://cs.opensource.google/gvisor/gvisor) @@ -42,10 +42,10 @@ http_archive( # binaries of symbols, which we don't want. "//tools:rules_go_symbols.patch", ], - sha256 = "7904dbecbaffd068651916dce77ff3437679f9d20e1a7956bff43826e7645fcc", + sha256 = "69de5c704a05ff37862f7e0f5534d4f479418afc21806c887db544a316f3cb6b", urls = [ - "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.25.1/rules_go-v0.25.1.tar.gz", - "https://github.com/bazelbuild/rules_go/releases/download/v0.25.1/rules_go-v0.25.1.tar.gz", + "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.27.0/rules_go-v0.27.0.tar.gz", + "https://github.com/bazelbuild/rules_go/releases/download/v0.27.0/rules_go-v0.27.0.tar.gz", ], ) @@ -58,10 +58,10 @@ http_archive( # slightly future proof this mechanism. "//tools:bazel_gazelle_generate.patch", ], - sha256 = "222e49f034ca7a1d1231422cdb67066b885819885c356673cb1f72f748a3c9d4", + sha256 = "62ca106be173579c0a167deb23358fdfe71ffa1e4cfdddf5582af26520f1c66f", urls = [ - "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.22.3/bazel-gazelle-v0.22.3.tar.gz", - "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.22.3/bazel-gazelle-v0.22.3.tar.gz", + "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.23.0/bazel-gazelle-v0.23.0.tar.gz", + "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.23.0/bazel-gazelle-v0.23.0.tar.gz", ], ) @@ -69,7 +69,7 @@ load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_depe go_rules_dependencies() -go_register_toolchains(go_version = "1.15.7") +go_register_toolchains(go_version = "1.16.2") load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies", "go_repository") @@ -81,8 +81,8 @@ gazelle_dependencies() go_repository( name = "org_golang_x_sys", importpath = "golang.org/x/sys", - sum = "h1:myAQVi0cGEoqQVR5POX+8RR2mrocKqNN1hmeMqhX27k=", - version = "v0.0.0-20210119212857-b64e53b001e4", + sum = "h1:+39ahH47SWi1PhMRAHfIrm8f69HRZ5K2koXH6dmO8TQ=", + version = "v0.0.0-20210314195730-07df6a141424", ) # Load C++ rules. @@ -131,10 +131,10 @@ go_repository( ) go_repository( - name = "com_github_google_go_github_v32", - importpath = "github.com/google/go-github/v32", - sum = "h1:GWkQOdXqviCPx7Q7Fj+KyPoGm4SwHRh8rheoPhd27II=", - version = "v32.1.0", + name = "com_github_google_go_github_v35", + importpath = "github.com/google/go-github/v35", + sum = "h1:s/soW8jauhjUC3rh8JI0FePuocj0DEI9DNBg/bVplE8=", + version = "v35.2.0", ) go_repository( @@ -179,6 +179,1049 @@ go_repository( version = "v1.1.0", ) +go_repository( + name = "com_github_alecthomas_template", + importpath = "github.com/alecthomas/template", + sum = "h1:JYp7IbQjafoB+tBA3gMyHYHrpOtNuDiK/uB5uXxq5wM=", + version = "v0.0.0-20190718012654-fb15b899a751", +) + +go_repository( + name = "com_github_alecthomas_units", + importpath = "github.com/alecthomas/units", + sum = "h1:Hs82Z41s6SdL1CELW+XaDYmOH4hkBN4/N9og/AsOv7E=", + version = "v0.0.0-20190717042225-c3de453c63f4", +) + +go_repository( + name = "com_github_alexflint_go_filemutex", + importpath = "github.com/alexflint/go-filemutex", + sum = "h1:AMzIhMUqU3jMrZiTuW0zkYeKlKDAFD+DG20IoO421/Y=", + version = "v0.0.0-20171022225611-72bdc8eae2ae", +) + +go_repository( + name = "com_github_antihax_optional", + importpath = "github.com/antihax/optional", + sum = "h1:xK2lYat7ZLaVVcIuj82J8kIro4V6kDe0AUDFboUCwcg=", + version = "v1.0.0", +) + +go_repository( + name = "com_github_armon_consul_api", + importpath = "github.com/armon/consul-api", + sum = "h1:G1bPvciwNyF7IUmKXNt9Ak3m6u9DE1rF+RmtIkBpVdA=", + version = "v0.0.0-20180202201655-eb2c6b5be1b6", +) + +go_repository( + name = "com_github_asaskevich_govalidator", + importpath = "github.com/asaskevich/govalidator", + sum = "h1:idn718Q4B6AGu/h5Sxe66HYVdqdGu2l9Iebqhi/AEoA=", + version = "v0.0.0-20190424111038-f61b66f89f4a", +) + +go_repository( + name = "com_github_aws_aws_sdk_go", + importpath = "github.com/aws/aws-sdk-go", + sum = "h1:m45+Ru/wA+73cOZXiEGLDH2d9uLN3iHqMc0/z4noDXE=", + version = "v1.15.11", +) + +go_repository( + name = "com_github_azure_azure_sdk_for_go", + importpath = "github.com/Azure/azure-sdk-for-go", + sum = "h1:KnPIugL51v3N3WwvaSmZbxukD1WuWXOiE9fRdu32f2I=", + version = "v16.2.1+incompatible", +) + +go_repository( + name = "com_github_azure_go_ansiterm", + importpath = "github.com/Azure/go-ansiterm", + sum = "h1:w+iIsaOQNcT7OZ575w+acHgRric5iCyQh+xv+KJ4HB8=", + version = "v0.0.0-20170929234023-d6e3b3328b78", +) + +go_repository( + name = "com_github_azure_go_autorest", + importpath = "github.com/Azure/go-autorest", + sum = "h1:V5VMDjClD3GiElqLWO7mz2MxNAK/vTfRHdAubSIPRgs=", + version = "v14.2.0+incompatible", +) + +go_repository( + name = "com_github_beorn7_perks", + importpath = "github.com/beorn7/perks", + sum = "h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=", + version = "v1.0.1", +) + +go_repository( + name = "com_github_bgentry_speakeasy", + importpath = "github.com/bgentry/speakeasy", + sum = "h1:ByYyxL9InA1OWqxJqqp2A5pYHUrCiAL6K3J+LKSsQkY=", + version = "v0.1.0", +) + +go_repository( + name = "com_github_bitly_go_simplejson", + importpath = "github.com/bitly/go-simplejson", + sum = "h1:6IH+V8/tVMab511d5bn4M7EwGXZf9Hj6i2xSwkNEM+Y=", + version = "v0.5.0", +) + +go_repository( + name = "com_github_blang_semver", + importpath = "github.com/blang/semver", + sum = "h1:cQNTCjp13qL8KC3Nbxr/y2Bqb63oX6wdnnjpJbkM4JQ=", + version = "v3.5.1+incompatible", +) + +go_repository( + name = "com_github_bmizerany_assert", + importpath = "github.com/bmizerany/assert", + sum = "h1:DDGfHa7BWjL4YnC6+E63dPcxHo2sUxDIu8g3QgEJdRY=", + version = "v0.0.0-20160611221934-b7ed37b82869", +) + +go_repository( + name = "com_github_bshuster_repo_logrus_logstash_hook", + importpath = "github.com/bshuster-repo/logrus-logstash-hook", + sum = "h1:pgAtgj+A31JBVtEHu2uHuEx0n+2ukqUJnS2vVe5pQNA=", + version = "v0.4.1", +) + +go_repository( + name = "com_github_buger_jsonparser", + importpath = "github.com/buger/jsonparser", + sum = "h1:y853v6rXx+zefEcjET3JuKAqvhj+FKflQijjeaSv2iA=", + version = "v0.0.0-20180808090653-f4dd9f5a6b44", +) + +go_repository( + name = "com_github_bugsnag_bugsnag_go", + importpath = "github.com/bugsnag/bugsnag-go", + sum = "h1:rFt+Y/IK1aEZkEHchZRSq9OQbsSzIT/OrI8YFFmRIng=", + version = "v0.0.0-20141110184014-b1d153021fcd", +) + +go_repository( + name = "com_github_bugsnag_osext", + importpath = "github.com/bugsnag/osext", + sum = "h1:otBG+dV+YK+Soembjv71DPz3uX/V/6MMlSyD9JBQ6kQ=", + version = "v0.0.0-20130617224835-0dd3f918b21b", +) + +go_repository( + name = "com_github_bugsnag_panicwrap", + importpath = "github.com/bugsnag/panicwrap", + sum = "h1:nvj0OLI3YqYXer/kZD8Ri1aaunCxIEsOst1BVJswV0o=", + version = "v0.0.0-20151223152923-e2c28503fcd0", +) + +go_repository( + name = "com_github_cespare_xxhash", + importpath = "github.com/cespare/xxhash", + sum = "h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=", + version = "v1.1.0", +) + +go_repository( + name = "com_github_cespare_xxhash_v2", + importpath = "github.com/cespare/xxhash/v2", + sum = "h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=", + version = "v2.1.1", +) + +go_repository( + name = "com_github_checkpoint_restore_go_criu_v4", + importpath = "github.com/checkpoint-restore/go-criu/v4", + sum = "h1:WW2B2uxx9KWF6bGlHqhm8Okiafwwx7Y2kcpn8lCpjgo=", + version = "v4.1.0", +) + +go_repository( + name = "com_github_cncf_xds_go", + importpath = "github.com/cncf/xds/go", + sum = "h1:OZmjad4L3H8ncOIR8rnb5MREYqG8ixi5+WbeUsquF0c=", + version = "v0.0.0-20210312221358-fbca930ec8ed", +) + +go_repository( + name = "com_github_cockroachdb_datadriven", + importpath = "github.com/cockroachdb/datadriven", + sum = "h1:OaNxuTZr7kxeODyLWsRMC+OD03aFUH+mW6r2d+MWa5Y=", + version = "v0.0.0-20190809214429-80d97fb3cbaa", +) + +go_repository( + name = "com_github_containerd_btrfs", + importpath = "github.com/containerd/btrfs", + sum = "h1:osn1exbzdub9L5SouXO5swW4ea/xVdJZ3wokxN5GrnA=", + version = "v1.0.0", +) + +go_repository( + name = "com_github_containerd_go_cni", + importpath = "github.com/containerd/go-cni", + sum = "h1:YbJAhpTevL2v6u8JC1NhCYRwf+3Vzxcc5vGnYoJ7VeE=", + version = "v1.0.2", +) + +go_repository( + name = "com_github_containerd_imgcrypt", + importpath = "github.com/containerd/imgcrypt", + sum = "h1:31GdXSmR2bZRPuZ/5lgkXivzNSejJQPsVOq82qqzP/M=", + version = "v1.0.3", +) + +go_repository( + name = "com_github_containernetworking_cni", + importpath = "github.com/containernetworking/cni", + sum = "h1:7zpDnQ3T3s4ucOuJ/ZCLrYBxzkg0AELFfII3Epo9TmI=", + version = "v0.8.1", +) + +go_repository( + name = "com_github_containernetworking_plugins", + importpath = "github.com/containernetworking/plugins", + sum = "h1:bU7QieuAp+sACI2vCzESJ3FoT860urYP+lThyZkb/2M=", + version = "v0.8.7", +) + +go_repository( + name = "com_github_containers_ocicrypt", + importpath = "github.com/containers/ocicrypt", + sum = "h1:vYgl+RZ9Q3DPMuTfxmN+qp0X2Bj52uuY2vnt6GzVe1c=", + version = "v1.0.3", +) + +go_repository( + name = "com_github_coreos_bbolt", + importpath = "github.com/coreos/bbolt", + sum = "h1:wZwiHHUieZCquLkDL0B8UhzreNWsPHooDAG3q34zk0s=", + version = "v1.3.2", +) + +go_repository( + name = "com_github_coreos_etcd", + importpath = "github.com/coreos/etcd", + sum = "h1:jFneRYjIvLMLhDLCzuTuU4rSJUjRplcJQ7pD7MnhC04=", + version = "v3.3.10+incompatible", +) + +go_repository( + name = "com_github_coreos_go_iptables", + importpath = "github.com/coreos/go-iptables", + sum = "h1:mw6SAibtHKZcNzAsOxjoHIG0gy5YFHhypWSSNc6EjbQ=", + version = "v0.5.0", +) + +go_repository( + name = "com_github_coreos_go_oidc", + importpath = "github.com/coreos/go-oidc", + sum = "h1:sdJrfw8akMnCuUlaZU3tE/uYXFgfqom8DBE9so9EBsM=", + version = "v2.1.0+incompatible", +) + +go_repository( + name = "com_github_coreos_go_semver", + importpath = "github.com/coreos/go-semver", + sum = "h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=", + version = "v0.3.0", +) + +go_repository( + name = "com_github_coreos_go_systemd", + importpath = "github.com/coreos/go-systemd", + sum = "h1:Wf6HqHfScWJN9/ZjdUKyjop4mf3Qdd+1TvvltAvM3m8=", + version = "v0.0.0-20190321100706-95778dfbb74e", +) + +go_repository( + name = "com_github_coreos_pkg", + importpath = "github.com/coreos/pkg", + sum = "h1:lBNOc5arjvs8E5mO2tbpBpLoyyu8B6e44T7hJy6potg=", + version = "v0.0.0-20180928190104-399ea9e2e55f", +) + +go_repository( + name = "com_github_creack_pty", + importpath = "github.com/creack/pty", + sum = "h1:6pwm8kMQKCmgUg0ZHTm5+/YvRK0s3THD/28+T6/kk4A=", + version = "v1.1.7", +) + +go_repository( + name = "com_github_cyphar_filepath_securejoin", + importpath = "github.com/cyphar/filepath-securejoin", + sum = "h1:jCwT2GTP+PY5nBz3c/YL5PAIbusElVrPujOBSCj8xRg=", + version = "v0.2.2", +) + +go_repository( + name = "com_github_d2g_dhcp4", + importpath = "github.com/d2g/dhcp4", + sum = "h1:Xo2rK1pzOm0jO6abTPIQwbAmqBIOj132otexc1mmzFc=", + version = "v0.0.0-20170904100407-a1d1b6c41b1c", +) + +go_repository( + name = "com_github_d2g_dhcp4client", + importpath = "github.com/d2g/dhcp4client", + sum = "h1:suYBsYZIkSlUMEz4TAYCczKf62IA2UWC+O8+KtdOhCo=", + version = "v1.0.0", +) + +go_repository( + name = "com_github_d2g_dhcp4server", + importpath = "github.com/d2g/dhcp4server", + sum = "h1:+CpLbZIeUn94m02LdEKPcgErLJ347NUwxPKs5u8ieiY=", + version = "v0.0.0-20181031114812-7d4a0a7f59a5", +) + +go_repository( + name = "com_github_d2g_hardwareaddr", + importpath = "github.com/d2g/hardwareaddr", + sum = "h1:itqmmf1PFpC4n5JW+j4BU7X4MTfVurhYRTjODoPb2Y8=", + version = "v0.0.0-20190221164911-e7d9fbe030e4", +) + +go_repository( + name = "com_github_denverdino_aliyungo", + importpath = "github.com/denverdino/aliyungo", + sum = "h1:p6poVbjHDkKa+wtC8frBMwQtT3BmqGYBjzMwJ63tuR4=", + version = "v0.0.0-20190125010748-a747050bb1ba", +) + +go_repository( + name = "com_github_dgryski_go_sip13", + importpath = "github.com/dgryski/go-sip13", + sum = "h1:RMLoZVzv4GliuWafOuPuQDKSm1SJph7uCRnnS61JAn4=", + version = "v0.0.0-20181026042036-e10d5fee7954", +) + +go_repository( + name = "com_github_dnaeon_go_vcr", + importpath = "github.com/dnaeon/go-vcr", + sum = "h1:r8L/HqC0Hje5AXMu1ooW8oyQyOFv4GxqpL0nRP7SLLY=", + version = "v1.0.1", +) + +go_repository( + name = "com_github_docker_go_metrics", + importpath = "github.com/docker/go-metrics", + sum = "h1:AgB/0SvBxihN0X8OR4SjsblXkbMvalQ8cjmtKQ2rQV8=", + version = "v0.0.1", +) + +go_repository( + name = "com_github_docker_libtrust", + importpath = "github.com/docker/libtrust", + sum = "h1:ZClxb8laGDf5arXfYcAtECDFgAgHklGI8CxgjHnXKJ4=", + version = "v0.0.0-20150114040149-fa567046d9b1", +) + 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"h1:lIOOHPEbXzO3vnmx2gok1Tfs31Q8GQqKLc8vVqyQq/I=", + version = "v0.0.0-20201008174630-78d3cae3a980", +) + +go_repository( + name = "com_github_tchap_go_patricia", + importpath = "github.com/tchap/go-patricia", + sum = "h1:JvoDL7JSoIP2HDE8AbDH3zC8QBPxmzYe32HHy5yQ+Ck=", + version = "v2.2.6+incompatible", +) + +go_repository( + name = "com_github_tmc_grpc_websocket_proxy", + importpath = "github.com/tmc/grpc-websocket-proxy", + sum = "h1:LnC5Kc/wtumK+WB441p7ynQJzVuNRJiqddSIE3IlSEQ=", + version = "v0.0.0-20190109142713-0ad062ec5ee5", +) + +go_repository( + name = "com_github_ugorji_go", + importpath = "github.com/ugorji/go", + sum = "h1:j4s+tAvLfL3bZyefP2SEWmhBzmuIlH/eqNuPdFPgngw=", + version = "v1.1.4", +) + +go_repository( + name = "com_github_willf_bitset", + importpath = "github.com/willf/bitset", + sum = "h1:N7Z7E9UvjW+sGsEl7k/SJrvY2reP1A07MrGuCjIOjRE=", + version = "v1.1.11", +) + +go_repository( + name = "com_github_xiang90_probing", + importpath = "github.com/xiang90/probing", + sum = "h1:eY9dn8+vbi4tKz5Qo6v2eYzo7kUS51QINcR5jNpbZS8=", + version = "v0.0.0-20190116061207-43a291ad63a2", +) + +go_repository( + name = "com_github_xordataexchange_crypt", + importpath = "github.com/xordataexchange/crypt", + sum = "h1:ESFSdwYZvkeru3RtdrYueztKhOBCSAAzS4Gf+k0tEow=", + version = "v0.0.3-0.20170626215501-b2862e3d0a77", +) + +go_repository( + name = "com_github_yvasiyarov_go_metrics", + importpath = "github.com/yvasiyarov/go-metrics", + sum = "h1:+lm10QQTNSBd8DVTNGHx7o/IKu9HYDvLMffDhbyLccI=", + version = "v0.0.0-20140926110328-57bccd1ccd43", +) + +go_repository( + name = "com_github_yvasiyarov_gorelic", + importpath = "github.com/yvasiyarov/gorelic", + sum = "h1:hlE8//ciYMztlGpl/VA+Zm1AcTPHYkHJPbHqE6WJUXE=", + version = "v0.0.0-20141212073537-a9bba5b9ab50", +) + +go_repository( + name = "com_github_yvasiyarov_newrelic_platform_go", + importpath = "github.com/yvasiyarov/newrelic_platform_go", + sum = "h1:ERexzlUfuTvpE74urLSbIQW0Z/6hF9t8U4NsJLaioAY=", + version = "v0.0.0-20140908184405-b21fdbd4370f", +) + +go_repository( + name = "in_gopkg_airbrake_gobrake_v2", + importpath = "gopkg.in/airbrake/gobrake.v2", + sum = "h1:7z2uVWwn7oVeeugY1DtlPAy5H+KYgB1KeKTnqjNatLo=", + version = "v2.0.9", +) + +go_repository( + name = "in_gopkg_alecthomas_kingpin_v2", + importpath = "gopkg.in/alecthomas/kingpin.v2", + sum = "h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc=", + version = "v2.2.6", +) + +go_repository( + name = "in_gopkg_cheggaaa_pb_v1", + importpath = "gopkg.in/cheggaaa/pb.v1", + sum = "h1:Ev7yu1/f6+d+b3pi5vPdRPc6nNtP1umSfcWiEfRqv6I=", + version = "v1.0.25", +) + +go_repository( + name = "in_gopkg_gemnasium_logrus_airbrake_hook_v2", + importpath = "gopkg.in/gemnasium/logrus-airbrake-hook.v2", + sum = "h1:OAj3g0cR6Dx/R07QgQe8wkA9RNjB2u4i700xBkIT4e0=", + version = "v2.1.2", +) + +go_repository( + name = "in_gopkg_natefinch_lumberjack_v2", + importpath = "gopkg.in/natefinch/lumberjack.v2", + sum = "h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXLknAOE8=", + version = "v2.0.0", +) + +go_repository( + name = "in_gopkg_resty_v1", + importpath = "gopkg.in/resty.v1", + sum = "h1:CuXP0Pjfw9rOuY6EP+UvtNvt5DSqHpIxILZKT/quCZI=", + version = "v1.12.0", +) + +go_repository( + name = "in_gopkg_square_go_jose_v2", + importpath = "gopkg.in/square/go-jose.v2", + sum = "h1:7odma5RETjNHWJnR32wx8t+Io4djHE1PqxCFx3iiZ2w=", + version = "v2.5.1", +) + +go_repository( + name = "in_gopkg_yaml_v3", + importpath = "gopkg.in/yaml.v3", + sum = "h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=", + version = "v3.0.0-20200313102051-9f266ea9e77c", +) + +go_repository( + name = "io_etcd_go_bbolt", + importpath = "go.etcd.io/bbolt", + sum = "h1:XAzx9gjCb0Rxj7EoqcClPD1d5ZBxZJk0jbuoPHenBt0=", + version = "v1.3.5", +) + +go_repository( + name = "io_etcd_go_etcd", + importpath = "go.etcd.io/etcd", + sum = "h1:1JFLBqwIgdyHN1ZtgjTBwO+blA6gVOmZurpiMEsETKo=", + version = "v0.5.0-alpha.5.0.20200910180754-dd1b699fc489", +) + +go_repository( + name = "io_k8s_component_base", + importpath = "k8s.io/component-base", + sum = "h1:wHmQb3b/QCTODA/MGih9x7XZQmhdDlA8AxJnAID6T2A=", + version = "v0.16.13", +) + +go_repository( + name = "io_k8s_cri_api", + importpath = "k8s.io/cri-api", + sum = "h1:iXX0K2pRrbR8yXbZtDK/bSnmg/uSqIFiVJK1x4LUOMc=", + version = "v0.20.6", +) + +go_repository( + name = "io_k8s_klog_v2", + importpath = "k8s.io/klog/v2", + sum = "h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=", + version = "v2.4.0", +) + +go_repository( + name = "io_k8s_kubernetes", + importpath = "k8s.io/kubernetes", + sum = "h1:qTfB+u5M92k2fCCCVP2iuhgwwSOv1EkAkvQY1tQODD8=", + version = "v1.13.0", +) + +go_repository( + name = "io_k8s_sigs_apiserver_network_proxy_konnectivity_client", + importpath = "sigs.k8s.io/apiserver-network-proxy/konnectivity-client", + sum = "h1:4uqm9Mv+w2MmBYD+F4qf/v6tDFUdPOk29C095RbU5mY=", + version = "v0.0.15", +) + +go_repository( + name = "io_k8s_sigs_structured_merge_diff_v4", + importpath = "sigs.k8s.io/structured-merge-diff/v4", + sum = "h1:4oyYo8NREp49LBBhKxEqCulFjg26rawYKrnCmg+Sr6c=", + version = "v4.0.3", +) + +go_repository( + name = "io_opentelemetry_go_proto_otlp", + importpath = "go.opentelemetry.io/proto/otlp", + sum = "h1:rwOQPCuKAKmwGKq2aVNnYIibI6wnV7EvzgfTCzcdGg8=", + version = "v0.7.0", +) + +go_repository( + name = "org_golang_google_cloud", + importpath = "google.golang.org/cloud", + sum = "h1:Cpp2P6TPjujNoC5M2KHY6g7wfyLYfIWRZaSdIKfDasA=", + version = "v0.0.0-20151119220103-975617b05ea8", +) + +go_repository( + name = "org_mozilla_go_pkcs7", + importpath = "go.mozilla.org/pkcs7", + sum = "h1:A/5uWzF44DlIgdm/PQFwfMkW0JX+cIcQi/SwLAmZP5M=", + version = "v0.0.0-20200128120323-432b2356ecb1", +) + +go_repository( + name = "org_uber_go_zap", + importpath = "go.uber.org/zap", + sum = "h1:ORx85nbTijNz8ljznvCMR1ZBIPKFn3jQrag10X2AsuM=", + version = "v1.10.0", +) + +go_repository( + name = "tools_gotest_v3", + importpath = "gotest.tools/v3", + sum = "h1:4AuOwCGf4lLR9u3YOe2awrHygurzhO/HeQ6laiA6Sx0=", + version = "v3.0.3", +) + +go_repository( + name = "com_github_bazelbuild_rules_go", + importpath = "github.com/bazelbuild/rules_go", + sum = "h1:KViqR7qKXwz+LrNdIauCDU21kneCk+4DnYjpvlJwH50=", + version = "v0.27.0", +) + rules_proto_dependencies() rules_proto_toolchains() @@ -210,6 +1253,20 @@ load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies") rules_pkg_dependencies() +# System Call test dependencies. +# grpc also has a dependency on abseil but as this is before grpc dependency +# declaration, it will take precedence over grpc's one +# Version LTS 20210324.2 +http_archive( + name = "com_google_absl", + sha256 = "1764491a199eb9325b177126547f03d244f86b4ff28f16f206c7b3e7e4f777ec", + strip_prefix = "abseil-cpp-278e0a071885a22dcd2fd1b5576cc44757299343", + urls = [ + "https://mirror.bazel.build/github.com/abseil/abseil-cpp/archive/278e0a071885a22dcd2fd1b5576cc44757299343.tar.gz", + "https://github.com/abseil/abseil-cpp/archive/278e0a071885a22dcd2fd1b5576cc44757299343.tar.gz" + ], +) + # Load C++ grpc rules. http_archive( name = "com_github_grpc_grpc", @@ -228,16 +1285,6 @@ load("@com_github_grpc_grpc//bazel:grpc_extra_deps.bzl", "grpc_extra_deps") grpc_extra_deps() -# System Call test dependencies. -http_archive( - name = "com_google_absl", - sha256 = "56775f1283a59e6274c28d99981a9717ff4e0b1161e9129fdb2fcf22531d8d93", - strip_prefix = "abseil-cpp-a0d1e098c2f99694fa399b175a7ccf920762030e", - urls = [ - "https://mirror.bazel.build/github.com/abseil/abseil-cpp/archive/a0d1e098c2f99694fa399b175a7ccf920762030e.tar.gz", - "https://github.com/abseil/abseil-cpp/archive/a0d1e098c2f99694fa399b175a7ccf920762030e.tar.gz", - ], -) http_archive( name = "com_google_googletest", @@ -310,8 +1357,8 @@ go_repository( go_repository( name = "com_github_golang_mock", importpath = "github.com/golang/mock", - sum = "h1:l75CXGRSwbaYNpl/Z2X1XIIAMSCquvXgpVZDhwEIJsc=", - version = "v1.4.4", + sum = "h1:jlYHihg//f7RRwuPfptm04yp4s7O6Kw8EZiVYIGcH0g=", + version = "v1.5.0", ) go_repository( @@ -324,15 +1371,15 @@ go_repository( go_repository( name = "com_github_google_uuid", importpath = "github.com/google/uuid", - sum = "h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=", - version = "v1.1.2", + sum = "h1:qJYtXnJRWmpe7m/3XlyhrsLrEURqHRM2kxzoxXqyUDs=", + version = "v1.2.0", ) go_repository( name = "com_github_kr_pretty", importpath = "github.com/kr/pretty", - sum = "h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=", - version = "v0.1.0", + sum = "h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=", + version = "v0.2.1", ) go_repository( @@ -374,50 +1421,50 @@ go_repository( name = "org_golang_google_grpc", build_file_proto_mode = "disable", importpath = "google.golang.org/grpc", - sum = "h1:iGG0ZwQMaxJT/qsL0nnzZCg+4aiWHuQy3MytzLieAjo=", - version = "v1.36.0-dev.0.20210208035533-9280052d3665", + sum = "h1:c+E5hkHV2oYLLcjZ0Uulu4thvOFKB0a9TWvowIWqgu4=", + version = "v1.39.0-dev.0.20210518002758-2713b77e8526", ) go_repository( name = "in_gopkg_check_v1", importpath = "gopkg.in/check.v1", - sum = "h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=", - version = "v1.0.0-20180628173108-788fd7840127", + sum = "h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=", + version = "v1.0.0-20190902080502-41f04d3bba15", ) go_repository( name = "org_golang_x_crypto", importpath = "golang.org/x/crypto", - sum = "h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=", - version = "v0.0.0-20200622213623-75b288015ac9", + sum = "h1:/ZScEX8SfEmUGRHs0gxpqteO5nfNW6axyZbBdw9A12g=", + version = "v0.0.0-20210220033148-5ea612d1eb83", ) go_repository( name = "org_golang_x_mod", importpath = "golang.org/x/mod", - sum = "h1:8pl+sMODzuvGJkmj2W4kZihvVb5mKm8pB/X44PIQHv8=", - version = "v0.4.0", + sum = "h1:Kvvh58BN8Y9/lBi7hTekvtMpm07eUZ0ck5pRHpsMWrY=", + version = "v0.4.1", ) go_repository( name = "org_golang_x_net", importpath = "golang.org/x/net", - sum = "h1:iFwSg7t5GZmB/Q5TjiEAsdoLDrdJRC1RiF2WhuV29Qw=", - version = "v0.0.0-20201224014010-6772e930b67b", + sum = "h1:qWPm9rbaAMKs8Bq/9LRpbMqxWRVUAQwMI9fVrssnTfw=", + version = "v0.0.0-20210226172049-e18ecbb05110", ) go_repository( name = "org_golang_x_sync", importpath = "golang.org/x/sync", - sum = "h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=", - version = "v0.0.0-20201020160332-67f06af15bc9", + sum = "h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=", + version = "v0.0.0-20210220032951-036812b2e83c", ) go_repository( name = "org_golang_x_text", importpath = "golang.org/x/text", - sum = "h1:0YWbFKbhXG/wIiuHDSKpS0Iy7FSA+u45VtBMfQcFTTc=", - version = "v0.3.4", + sum = "h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=", + version = "v0.3.5", ) go_repository( @@ -444,22 +1491,22 @@ go_repository( go_repository( name = "com_github_google_btree", importpath = "github.com/google/btree", - sum = "h1:0udJVsspx3VBr5FwtLhQQtuAsVc79tTq0ocGIPAU6qo=", - version = "v1.0.0", + sum = "h1:gK4Kx5IaGY9CD5sPJ36FHiBJ6ZXl0kilRiiCj+jdYp4=", + version = "v1.0.1", ) go_repository( name = "com_github_golang_protobuf", importpath = "github.com/golang/protobuf", - sum = "h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=", - version = "v1.4.3", + sum = "h1:LUVKkCeviFUMKqHa4tXIIij/lbhnMbP7Fn5wKdKkRh4=", + version = "v1.5.0", ) go_repository( name = "org_golang_x_oauth2", importpath = "golang.org/x/oauth2", - sum = "h1:Lm4OryKCca1vehdsWogr9N4t7NfZxLbJoc/H0w4K4S4=", - version = "v0.0.0-20201208152858-08078c50e5b5", + sum = "h1:0Ja1LBD+yisY6RWM/BH7TJVXWsSjs2VwBSmvSX4HdBc=", + version = "v0.0.0-20210402161424-2e8d93401602", ) go_repository( @@ -514,8 +1561,8 @@ go_repository( go_repository( name = "com_github_konsorten_go_windows_terminal_sequences", importpath = "github.com/konsorten/go-windows-terminal-sequences", - sum = "h1:DB17ag19krx9CFsz4o3enTrPXyIXCl+2iCXH/aMAp9s=", - version = "v1.0.2", + sum = "h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=", + version = "v1.0.3", ) go_repository( @@ -528,8 +1575,8 @@ go_repository( go_repository( name = "com_github_stretchr_testify", importpath = "github.com/stretchr/testify", - sum = "h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=", - version = "v1.5.1", + sum = "h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=", + version = "v1.6.1", ) go_repository( @@ -542,15 +1589,15 @@ go_repository( go_repository( name = "com_github_microsoft_go_winio", importpath = "github.com/Microsoft/go-winio", - sum = "h1:FtSW/jqD+l4ba5iPBj9CODVtgfYAD8w2wS923g/cFDk=", - version = "v0.4.16", + sum = "h1:Elr9Wn+sGKPlkaBvwu4mTrxtmOp3F3yV9qhaHbXGjwU=", + version = "v0.5.0", ) go_repository( name = "com_github_stretchr_objx", importpath = "github.com/stretchr/objx", - sum = "h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=", - version = "v0.1.1", + sum = "h1:Hbg2NidpLE8veEBkEZTL3CvlkUIVzuU9jDplZO54c48=", + version = "v0.2.0", ) go_repository( @@ -570,15 +1617,15 @@ go_repository( go_repository( name = "com_google_cloud_go", importpath = "cloud.google.com/go", - sum = "h1:XgtDnVJRCPEUG21gjFiRPz4zI1Mjg16R+NYQjfmU4XY=", - version = "v0.75.0", + sum = "h1:oqqswrt4x6b9OGBnNqdssxBl1xf0rSUNjU2BR4BZar0=", + version = "v0.79.0", ) go_repository( name = "io_opencensus_go", importpath = "go.opencensus.io", - sum = "h1:dntmOdLpSpHlVqbW5Eay97DelsZHe+55D+xC6i0dDS0=", - version = "v0.22.5", + sum = "h1:gqCw0LfLxScz8irSi8exQc7fyQ0fKQU/qnC/X8+V/1M=", + version = "v0.23.0", ) go_repository( @@ -634,8 +1681,8 @@ go_repository( go_repository( name = "com_github_containerd_continuity", importpath = "github.com/containerd/continuity", - sum = "h1:6JKvHHt396/qabvMhnhUZvWaHZzfVfldxE60TK8YLhg=", - version = "v0.0.0-20210208174643-50096c924a4e", + sum = "h1:UFRRY5JemiAhPZrr/uE0n8fMTLcZsUvySPr1+D7pgr8=", + version = "v0.1.0", ) go_repository( @@ -676,8 +1723,8 @@ go_repository( go_repository( name = "com_github_envoyproxy_go_control_plane", importpath = "github.com/envoyproxy/go-control-plane", - sum = "h1:EmNYJhPYy0pOFjCx2PrgtaBXmee0iUX9hLlxE1xHOJE=", - version = "v0.9.9-0.20201210154907-fd9021fe5dad", + sum = "h1:dulLQAYQFYtG5MTplgNGHWuV2D+OBD+Z8lmDBmbLg+s=", + version = "v0.9.9-0.20210512163311-63b5d3c536b0", ) go_repository( @@ -690,15 +1737,15 @@ go_repository( go_repository( name = "com_github_gogo_googleapis", importpath = "github.com/gogo/googleapis", - sum = "h1:zgVt4UpGxcqVOw97aRGxT4svlcmdK35fynLNctY32zI=", - version = "v1.4.0", + sum = "h1:1Yx4Myt7BxzvUr5ldGSbwYiZG6t9wGBZ+8/fX3Wvtq0=", + version = "v1.4.1", ) go_repository( name = "com_github_gogo_protobuf", importpath = "github.com/gogo/protobuf", - sum = "h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=", - version = "v1.3.1", + sum = "h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=", + version = "v1.3.2", ) go_repository( @@ -711,8 +1758,8 @@ go_repository( go_repository( name = "com_github_google_go_cmp", importpath = "github.com/google/go-cmp", - sum = "h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M=", - version = "v0.5.4", + sum = "h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=", + version = "v0.5.5", ) go_repository( @@ -739,8 +1786,8 @@ go_repository( go_repository( name = "com_github_kisielk_errcheck", importpath = "github.com/kisielk/errcheck", - sum = "h1:reN85Pxc5larApoH1keMBiu2GWtPqXQ1nc9gx+jOU+E=", - version = "v1.2.0", + sum = "h1:e8esj/e4R+SAOwFwN+n3zr0nYeCyeweozKfO23MvHzY=", + version = "v1.5.0", ) go_repository( @@ -760,8 +1807,8 @@ go_repository( go_repository( name = "com_github_opencontainers_runc", importpath = "github.com/opencontainers/runc", - sum = "h1:GlxAyO6x8rfZYN9Tt0Kti5a/cP41iuiO2yYT0IJGY8Y=", - version = "v0.1.1", + sum = "h1:4+xo8mtWixbHoEm451+WJNUrq12o2/tDsyK9Vgc/NcA=", + version = "v1.0.0-rc90", ) go_repository( @@ -781,22 +1828,22 @@ go_repository( go_repository( name = "com_github_prometheus_client_model", importpath = "github.com/prometheus/client_model", - sum = "h1:gQz4mCbXsO+nc9n1hCxHcGA3Zx3Eo+UHZoInFGUIXNM=", - version = "v0.0.0-20190812154241-14fe0d1b01d4", + sum = "h1:uq5h0d+GuxiXLJLNABMgp2qUWDPiLvgCzz2dUR+/W/M=", + version = "v0.2.0", ) go_repository( name = "com_github_prometheus_procfs", importpath = "github.com/prometheus/procfs", - sum = "h1:Lo6mRUjdS99f3zxYOUalftWHUoOGaDRqFk1+j0Q57/I=", - version = "v0.0.0-20190522114515-bc1a522cf7b1", + sum = "h1:mxy4L2jP6qMonqmq+aTtOx1ifVWUgG/TAmntgbh3xv4=", + version = "v0.6.0", ) go_repository( name = "com_github_spf13_cobra", importpath = "github.com/spf13/cobra", - sum = "h1:GQkkv3XSnxhAMjdq2wLfEnptEVr+2BNvmHizILHn+d4=", - version = "v0.0.2-0.20171109065643-2da4a54c5cee", + sum = "h1:6m/oheQuQ13N9ks4hubMG6BnvwOeaJrqSPLahSnczz8=", + version = "v1.0.0", ) go_repository( @@ -844,15 +1891,15 @@ go_repository( go_repository( name = "org_golang_google_genproto", importpath = "google.golang.org/genproto", - sum = "h1:n7yjMkxUgbEahYENvAGVlxMUW8TF/KEavLez31znfDw=", - version = "v0.0.0-20210108203827-ffc7fda8c3d7", + sum = "h1:YRBxgxUW6GFi+AKsn8WGA9k1SZohK+gGuEqdeT5aoNQ=", + version = "v0.0.0-20210312152112-fc591d9ea70f", ) go_repository( name = "org_golang_google_protobuf", importpath = "google.golang.org/protobuf", - sum = "h1:jEdfCm+8YTWSYgU4L7Nq0jjU+q9RxIhi0cXLTY+Ih3A=", - version = "v1.25.1-0.20201020201750-d3470999428b", + sum = "h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=", + version = "v1.26.0", ) go_repository( @@ -928,8 +1975,8 @@ go_repository( go_repository( name = "com_github_google_pprof", importpath = "github.com/google/pprof", - sum = "h1:LB1NXQJhB+dF+5kZVLIn85HJqGvK3zKHIku3bdy3IRc=", - version = "v0.0.0-20210115211752-39141e76b647", + sum = "h1:l2YRhr+YLzmSp7KJMswRVk/lO5SwoFIcCLzJsVj+YPc=", + version = "v0.0.0-20210423192551-a2663126120b", ) go_repository( @@ -991,8 +2038,8 @@ go_repository( go_repository( name = "org_golang_google_api", importpath = "google.golang.org/api", - sum = "h1:l2Nfbl2GPXdWorv+dT2XfinX2jOOw4zv1VhLstx+6rE=", - version = "v0.36.0", + sum = "h1:uqATLkpxiBrhrvFoebXUjvyzE9nQf+pVyy0Z0IHE+fc=", + version = "v0.42.0", ) go_repository( @@ -1054,8 +2101,8 @@ go_repository( go_repository( name = "com_github_cilium_ebpf", importpath = "github.com/cilium/ebpf", - sum = "h1:Fv93L3KKckEcEHR3oApXVzyBTDA8WAm6VXhPE00N3f8=", - version = "v0.2.0", + sum = "h1:QlHdikaxALkqWasW8hAC1mfR0jdmvbfaBdBPFmRSglA=", + version = "v0.4.0", ) go_repository( @@ -1096,43 +2143,43 @@ go_repository( go_repository( name = "com_github_azure_go_autorest_autorest", importpath = "github.com/Azure/go-autorest/autorest", - sum = "h1:MRvx8gncNaXJqOoLmhNjUAKh33JJF8LyxPhomEtOsjs=", - version = "v0.9.0", + sum = "h1:eVvIXUKiTgv++6YnWb42DUA1YL7qDugnKP0HljexdnQ=", + version = "v0.11.1", ) go_repository( name = "com_github_azure_go_autorest_autorest_adal", importpath = "github.com/Azure/go-autorest/autorest/adal", - sum = "h1:q2gDruN08/guU9vAjuPWff0+QIrpH6ediguzdAzXAUU=", - version = "v0.5.0", + sum = "h1:Y3bBUV4rTuxenJJs41HU3qmqsb+auo+a3Lz+PlJPpL0=", + version = "v0.9.5", ) go_repository( name = "com_github_azure_go_autorest_autorest_date", importpath = "github.com/Azure/go-autorest/autorest/date", - sum = "h1:YGrhWfrgtFs84+h0o46rJrlmsZtyZRg470CqAXTZaGM=", - version = "v0.1.0", + sum = "h1:7gUk1U5M/CQbp9WoqinNzJar+8KY+LPI6wiWrP/myHw=", + version = "v0.3.0", ) go_repository( name = "com_github_azure_go_autorest_autorest_mocks", importpath = "github.com/Azure/go-autorest/autorest/mocks", - sum = "h1:Ww5g4zThfD/6cLb4z6xxgeyDa7QDkizMkJKe0ysZXp0=", - version = "v0.2.0", + sum = "h1:K0laFcLE6VLTOwNgSxaGbUcLPuGXlNkbVvq4cW4nIHk=", + version = "v0.4.1", ) go_repository( name = "com_github_azure_go_autorest_logger", importpath = "github.com/Azure/go-autorest/logger", - sum = "h1:ruG4BSDXONFRrZZJ2GUXDiUyVpayPmb1GnWeHDdaNKY=", - version = "v0.1.0", + sum = "h1:e4RVHVZKC5p6UANLJHkM4OfR1UKZPj8Wt8Pcx+3oqrE=", + version = "v0.2.0", ) go_repository( name = "com_github_azure_go_autorest_tracing", importpath = "github.com/Azure/go-autorest/tracing", - sum = "h1:TRn4WjSnkcSy5AEG3pnbtFSwNtwzjr4VYyQflFE619k=", - version = "v0.5.0", + sum = "h1:TYi4+3m5t6K48TGI9AUdb+IzbnSxvnvUMfuitfgcfuo=", + version = "v0.6.0", ) go_repository( @@ -1152,86 +2199,86 @@ go_repository( go_repository( name = "com_github_elazarl_goproxy", importpath = "github.com/elazarl/goproxy", - sum = "h1:p1yVGRW3nmb85p1Sh1ZJSDm4A4iKLS5QNbvUHMgGu/M=", - version = "v0.0.0-20170405201442-c4fc26588b6e", + sum = "h1:yUdfgN0XgIJw7foRItutHYUIhlcKzcSf5vDpdhQAKTc=", + version = "v0.0.0-20180725130230-947c36da3153", ) go_repository( name = "com_github_emicklei_go_restful", importpath = "github.com/emicklei/go-restful", - sum = "h1:H2pdYOb3KQ1/YsqVWoWNLQO+fusocsw354rqGTZtAgw=", - version = "v0.0.0-20170410110728-ff4f55a20633", + sum = "h1:spTtZBk5DYEvbxMVutUuTyh1Ao2r4iyvLdACqsl/Ljk=", + version = "v2.9.5+incompatible", ) go_repository( name = "com_github_evanphx_json_patch", importpath = "github.com/evanphx/json-patch", - sum = "h1:fUDGZCv/7iAN7u0puUVhvKCcsR6vRfwrJatElLBEf0I=", - version = "v4.2.0+incompatible", + sum = "h1:kLcOMZeuLAJvL2BPWLMIj5oaZQobrkAqrL+WFZwQses=", + version = "v4.9.0+incompatible", ) go_repository( name = "com_github_fsnotify_fsnotify", importpath = "github.com/fsnotify/fsnotify", - sum = "h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=", - version = "v1.4.7", + sum = "h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=", + version = "v1.4.9", ) go_repository( name = "com_github_ghodss_yaml", importpath = "github.com/ghodss/yaml", - sum = "h1:ZktWZesgun21uEDrwW7iEV1zPCGQldM2atlJZ3TdvVM=", - version = "v0.0.0-20150909031657-73d445a93680", + sum = "h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=", + version = "v1.0.0", ) go_repository( name = "com_github_go_logr_logr", importpath = "github.com/go-logr/logr", - sum = "h1:M1Tv3VzNlEHg6uyACnRdtrploV2P7wZqH8BoQMtz0cg=", - version = "v0.1.0", + sum = "h1:QvGt2nLcHH0WK9orKa+ppBPAxREcH364nPUedEpK0TY=", + version = "v0.2.0", ) go_repository( name = "com_github_go_openapi_jsonpointer", importpath = "github.com/go-openapi/jsonpointer", - sum = "h1:wSt/4CYxs70xbATrGXhokKF1i0tZjENLOo1ioIO13zk=", - version = "v0.0.0-20160704185906-46af16f9f7b1", + sum = "h1:gihV7YNZK1iK6Tgwwsxo2rJbD1GTbdm72325Bq8FI3w=", + version = "v0.19.3", ) go_repository( name = "com_github_go_openapi_jsonreference", importpath = "github.com/go-openapi/jsonreference", - sum = "h1:tF+augKRWlWx0J0B7ZyyKSiTyV6E1zZe+7b3qQlcEf8=", - version = "v0.0.0-20160704190145-13c6e3589ad9", + sum = "h1:5cxNfTy0UVC3X8JL5ymxzyoUZmo8iZb+jeTWn7tUa8o=", + version = "v0.19.3", ) go_repository( name = "com_github_go_openapi_spec", importpath = "github.com/go-openapi/spec", - sum = "h1:C1JKChikHGpXwT5UQDFaryIpDtyyGL/CR6C2kB7F1oc=", - version = "v0.0.0-20160808142527-6aced65f8501", + sum = "h1:A4SZ6IWh3lnjH0rG0Z5lkxazMGBECtrZcbyYQi+64k4=", + version = "v0.19.0", ) go_repository( name = "com_github_go_openapi_swag", importpath = "github.com/go-openapi/swag", - sum = "h1:zP3nY8Tk2E6RTkqGYrarZXuzh+ffyLDljLxCy1iJw80=", - version = "v0.0.0-20160704191624-1d0bd113de87", + sum = "h1:lTz6Ys4CmqqCQmZPBlbQENR1/GucA2bzYTE12Pw4tFY=", + version = "v0.19.5", ) go_repository( name = "com_github_google_gofuzz", importpath = "github.com/google/gofuzz", - sum = "h1:A8PeW59pxE9IoFRqBp37U+mSNaQoZ46F1f0f863XSXw=", - version = "v1.0.0", + sum = "h1:Hsa8mG0dQ46ij8Sl2AYJDUv1oA9/d6Vk+3LG99Oe02g=", + version = "v1.1.0", ) go_repository( name = "com_github_googleapis_gnostic", build_file_proto_mode = "disable_global", importpath = "github.com/googleapis/gnostic", - sum = "h1:7XGaL1e6bYS1yIonGp9761ExpPPV1ui0SAC59Yube9k=", - version = "v0.0.0-20170729233727-0c5108395e2d", + sum = "h1:BXDUo8p/DaxC+4FJY/SSx3gvnx9C1VdHNgaUkiEL5mk=", + version = "v0.4.0", ) go_repository( @@ -1258,22 +2305,22 @@ go_repository( go_repository( name = "com_github_imdario_mergo", importpath = "github.com/imdario/mergo", - sum = "h1:JboBksRwiiAJWvIYJVo46AfV+IAIKZpfrSzVKj42R4Q=", - version = "v0.3.5", + sum = "h1:UauaLniWCFHWd+Jp9oCEkTBj8VO/9DKg3PV3VCNMDIg=", + version = "v0.3.9", ) go_repository( name = "com_github_json_iterator_go", importpath = "github.com/json-iterator/go", - sum = "h1:KfgG9LzI+pYjr4xvmz/5H4FXjokeP+rlHLhv3iH62Fo=", - version = "v1.1.7", + sum = "h1:Kz6Cvnvv2wGdaG/V8yMvfkmNiXq9Ya2KUv4rouJJr68=", + version = "v1.1.10", ) go_repository( name = "com_github_mailru_easyjson", importpath = "github.com/mailru/easyjson", - sum = "h1:TpvdAwDAt1K4ANVOfcihouRdvP+MgAfDWwBuct4l6ZY=", - version = "v0.0.0-20160728113105-d5b7844b561a", + sum = "h1:aizVhC/NAAcKWb+5QsU1iNOZb4Yws5UO2I+aIprQITM=", + version = "v0.7.0", ) go_repository( @@ -1300,8 +2347,8 @@ go_repository( go_repository( name = "com_github_munnerz_goautoneg", importpath = "github.com/munnerz/goautoneg", - sum = "h1:7PxY7LVfSZm7PEeBTyK1rj1gABdCO2mbri6GKO1cMDs=", - version = "v0.0.0-20120707110453-a547fc61f48d", + sum = "h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=", + version = "v0.0.0-20191010083416-a7dc8b61c822", ) go_repository( @@ -1321,15 +2368,15 @@ go_repository( go_repository( name = "com_github_onsi_ginkgo", importpath = "github.com/onsi/ginkgo", - sum = "h1:VkHVNpR4iVnU8XQR6DBm8BqYjN7CRzw+xKUbVVbbW9w=", - version = "v1.8.0", + sum = "h1:mFwc4LvZ0xpSvDZ3E+k8Yte0hLOMxXUlP+yXtJqkYfQ=", + version = "v1.12.1", ) go_repository( name = "com_github_onsi_gomega", importpath = "github.com/onsi/gomega", - sum = "h1:izbySO9zDPmjJ8rDjLvkA2zJHIo+HkYXHnf7eN7SSyo=", - version = "v1.5.0", + sum = "h1:Gwkk+PTu/nfOwNMtUB/mRUv0X7ewW5dO4AERT1ThVKo=", + version = "v1.10.0", ) go_repository( @@ -1342,15 +2389,15 @@ go_repository( go_repository( name = "com_github_puerkitobio_purell", importpath = "github.com/PuerkitoBio/purell", - sum = "h1:0GoNN3taZV6QI81IXgCbxMyEaJDXMSIjArYBCYzVVvs=", - version = "v1.0.0", + sum = "h1:WEQqlqaGbrPkxLJWfBwQmfEAE1Z7ONdDLqrN38tNFfI=", + version = "v1.1.1", ) go_repository( name = "com_github_puerkitobio_urlesc", importpath = "github.com/PuerkitoBio/urlesc", - sum = "h1:JCHLVE3B+kJde7bIEo5N4J+ZbLhp0J1Fs+ulyRws4gE=", - version = "v0.0.0-20160726150825-5bd2802263f2", + sum = "h1:d+Bc7a5rLufV/sSk/8dngufqelfh6jnri85riMAaF/M=", + version = "v0.0.0-20170810143723-de5bf2ad4578", ) go_repository( @@ -1407,8 +2454,8 @@ go_repository( go_repository( name = "io_k8s_gengo", importpath = "k8s.io/gengo", - sum = "h1:4s3/R4+OYYYUKptXPhZKjQ04WJ6EhQQVFdjOFvCazDk=", - version = "v0.0.0-20190128074634-0689ccc1d7d6", + sum = "h1:sAvhNk5RRuc6FNYGqe7Ygz3PSo/2wGWbulskmzRX8Vs=", + version = "v0.0.0-20200413195148-3a45101e95ac", ) go_repository( @@ -1435,15 +2482,15 @@ go_repository( go_repository( name = "io_k8s_sigs_yaml", importpath = "sigs.k8s.io/yaml", - sum = "h1:4A07+ZFc2wgJwo8YNlQpr1rVlgUDlxXHhPJciaPY5gs=", - version = "v1.1.0", + sum = "h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=", + version = "v1.2.0", ) go_repository( name = "io_k8s_utils", importpath = "k8s.io/utils", - sum = "h1:+ySTxfHnfzZb9ys375PXNlLhkJPLKgHajBU0N62BDvE=", - version = "v0.0.0-20190801114015-581e00157fb1", + sum = "h1:CbnUZsM497iRC5QMVkHwyl8s2tB3g7yaSHkYPkpgelw=", + version = "v0.0.0-20201110183641-67b214c5f920", ) go_repository( diff --git a/g3doc/user_guide/debugging.md b/g3doc/user_guide/debugging.md index 54fdce34f..2291b5fab 100644 --- a/g3doc/user_guide/debugging.md +++ b/g3doc/user_guide/debugging.md @@ -61,24 +61,39 @@ You can debug gVisor like any other Golang program. If you're running with Docker, you'll need to find the sandbox PID and attach the debugger as root. Here is an example: +Install a runsc with debug symbols (you can also use the +[nightly release](../install/#nightly)): + ```bash -# Get a runsc with debug symbols (download nightly or build with symbols). -bazel build -c dbg //runsc:runsc +make dev BAZEL_OPTIONS="-c dbg" +``` -# Start the container you want to debug. -docker run --runtime=runsc --rm --name=test -d alpine sleep 1000 +Start the container you want to debug using the runsc runtime with debug +options: -# Find the sandbox PID. -docker inspect test | grep Pid | head -n 1 +```bash +docker run --runtime=$(git branch --show-current)-d --rm --name=test -p 8080:80 -d nginx +``` -# Attach your favorite debugger. -sudo dlv attach <PID> +Find the PID and attach your favorite debugger: + +```bash +sudo dlv attach $(docker inspect test | grep Pid | head -n 1 | grep -oe "[0-9]*") +``` -# Set a breakpoint and resume. -break mm.MemoryManager.MMap +Set a breakpoint for accept: + +```bash +break gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketOperations).Accept continue ``` +In a different window connect to nginx to trigger the breakpoint: + +```bash +curl http://localhost:8080/ +``` + ## Profiling `runsc` integrates with Go profiling tools and gives you easy commands to diff --git a/g3doc/user_guide/install.md b/g3doc/user_guide/install.md index bcfba0179..321f13ce8 100644 --- a/g3doc/user_guide/install.md +++ b/g3doc/user_guide/install.md @@ -138,7 +138,9 @@ sudo add-apt-repository "deb [arch=amd64,arm64] https://storage.googleapis.com/g ### Specific release -A given release release is available at the following URL: +Specific releases are the latest [point release](#point-release) for a given +date. Specific releases should be available for any date that has a point +release. A given release is available at the following URL: `https://storage.googleapis.com/gvisor/releases/release/${yyyymmdd}/${ARCH}` @@ -159,7 +161,9 @@ sudo add-apt-repository "deb [arch=amd64,arm64] https://storage.googleapis.com/g ### Point release -A given point release is available at the following URL: +Point releases correspond to +[releases](https://github.com/google/gvisor/releases) tagged in the Github +repository. A given point release is available at the following URL: `https://storage.googleapis.com/gvisor/releases/release/${yyyymmdd}.${rc}/${ARCH}` diff --git a/g3doc/user_guide/tutorials/BUILD b/g3doc/user_guide/tutorials/BUILD index f405349b3..a862c76f4 100644 --- a/g3doc/user_guide/tutorials/BUILD +++ b/g3doc/user_guide/tutorials/BUILD @@ -37,10 +37,19 @@ doc( ) doc( + name = "knative", + src = "knative.md", + category = "User Guide", + permalink = "/docs/tutorials/knative/", + subcategory = "Tutorials", + weight = "40", +) + +doc( name = "cni", src = "cni.md", category = "User Guide", permalink = "/docs/tutorials/cni/", subcategory = "Tutorials", - weight = "40", + weight = "50", ) diff --git a/g3doc/user_guide/tutorials/knative.md b/g3doc/user_guide/tutorials/knative.md new file mode 100644 index 000000000..3f5207fcc --- /dev/null +++ b/g3doc/user_guide/tutorials/knative.md @@ -0,0 +1,88 @@ +# Knative Services + +[Knative](https://knative.dev/) is a platform for running serverless workloads +on Kubernetes. This guide will show you how to run basic Knative workloads in +gVisor. + +## Prerequisites + +This guide assumes you have have a cluster that is capable of running gVisor +workloads. This could be a +[GKE Sandbox](https://cloud.google.com/kubernetes-engine/sandbox/) enabled +cluster on Google Cloud Platform or one you have set up yourself using +[containerd Quick Start](https://gvisor.dev/docs/user_guide/containerd/quick_start/). + +This guide will also assume you have Knative installed using +[Istio](https://istio.io/) as the network layer. You can follow the +[Knative installation guide](https://knative.dev/docs/install/install-serving-with-yaml/) +to install Knative. + +## Enable the RuntimeClass feature flag + +Knative allows the use of various parameters on Pods via +[feature flags](https://knative.dev/docs/serving/feature-flags/). We will enable +the +[runtimeClassName](https://knative.dev/docs/serving/feature-flags/#kubernetes-runtime-class) +feature flag to enable the use of the Kubernetes +[Runtime Class](https://kubernetes.io/docs/concepts/containers/runtime-class/). + +Edit the feature flags ConfigMap. + +```bash +kubectl edit configmap config-features -n knative-serving +``` + +Add the `kubernetes.podspec-runtimeclassname: enabled` to the `data` field. Once +you are finished the ConfigMap will look something like this (minus all the +system fields). + +```yaml +apiVersion: v1 +kind: ConfigMap +metadata: + name: config-features + namespace: knative-serving + labels: + serving.knative.dev/release: v0.22.0 +data: + kubernetes.podspec-runtimeclassname: enabled +``` + +## Deploy the Service + +After you have set the Runtime Class feature flag you can now create Knative +services that specify a `runtimeClassName` in the spec. + +```bash +cat <<EOF | kubectl apply -f - +apiVersion: serving.knative.dev/v1 +kind: Service +metadata: + name: helloworld-go +spec: + template: + spec: + runtimeClassName: gvisor + containers: + - image: gcr.io/knative-samples/helloworld-go + env: + - name: TARGET + value: "gVisor User" +EOF +``` + +You can see the pods running and their Runtime Class. + +```bash +kubectl get pods -o=custom-columns='NAME:.metadata.name,RUNTIME CLASS:.spec.runtimeClassName,STATUS:.status.phase' +``` + +Output should look something like the following. Note that your service might +scale to zero. If you access it via it's URL you should get a new Pod. + +``` +NAME RUNTIME CLASS STATUS +helloworld-go-00002-deployment-646c87b7f5-5v68s gvisor Running +``` + +Congrats! Your Knative service is now running in gVisor! @@ -3,57 +3,151 @@ module gvisor.dev/gvisor go 1.16 require ( - cloud.google.com/go v0.75.0 // indirect + cloud.google.com/go v0.79.0 // indirect + github.com/Azure/azure-sdk-for-go v16.2.1+incompatible // indirect + github.com/Azure/go-autorest/autorest v0.11.1 // indirect + github.com/Azure/go-autorest/autorest/adal v0.9.5 // indirect github.com/BurntSushi/toml v0.3.1 // indirect - github.com/Microsoft/go-winio v0.4.16 // indirect + github.com/Microsoft/go-winio v0.5.0 // indirect github.com/Microsoft/hcsshim v0.8.14 // indirect + github.com/Shopify/logrus-bugsnag v0.0.0-20171204204709-577dee27f20d // indirect + github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a // indirect + github.com/aws/aws-sdk-go v1.15.11 // indirect + github.com/bazelbuild/rules_go v0.27.0 // indirect + github.com/bitly/go-simplejson v0.5.0 // indirect + github.com/blang/semver v3.5.1+incompatible // indirect + github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect + github.com/bshuster-repo/logrus-logstash-hook v0.4.1 // indirect + github.com/bugsnag/bugsnag-go v0.0.0-20141110184014-b1d153021fcd // indirect + github.com/bugsnag/osext v0.0.0-20130617224835-0dd3f918b21b // indirect + github.com/bugsnag/panicwrap v0.0.0-20151223152923-e2c28503fcd0 // indirect github.com/cenkalti/backoff v1.1.1-0.20190506075156-2146c9339422 // indirect + github.com/checkpoint-restore/go-criu/v4 v4.1.0 // indirect + github.com/cilium/ebpf v0.4.0 // indirect + github.com/containerd/btrfs v1.0.0 // indirect github.com/containerd/cgroups v0.0.0-20201119153540-4cbc285b3327 // indirect github.com/containerd/console v1.0.1 // indirect github.com/containerd/containerd v1.3.9 // indirect - github.com/containerd/continuity v0.0.0-20210208174643-50096c924a4e // indirect + github.com/containerd/continuity v0.1.0 // indirect github.com/containerd/fifo v0.0.0-20191213151349-ff969a566b00 // indirect + github.com/containerd/go-cni v1.0.2 // indirect github.com/containerd/go-runc v0.0.0-20200220073739-7016d3ce2328 // indirect + github.com/containerd/imgcrypt v1.0.3 // indirect github.com/containerd/ttrpc v1.0.2 // indirect github.com/containerd/typeurl v0.0.0-20200205145503-b45ef1f1f737 // indirect + github.com/containernetworking/cni v0.8.1 // indirect + github.com/containernetworking/plugins v0.8.7 // indirect + github.com/coreos/go-iptables v0.5.0 // indirect + github.com/coreos/go-oidc v2.1.0+incompatible // indirect + github.com/coreos/go-semver v0.3.0 // indirect + github.com/cyphar/filepath-securejoin v0.2.2 // indirect + github.com/denverdino/aliyungo v0.0.0-20190125010748-a747050bb1ba // indirect + github.com/dnaeon/go-vcr v1.0.1 // indirect github.com/docker/distribution v2.7.1-0.20190205005809-0d3efadf0154+incompatible // indirect github.com/docker/docker v1.4.2-0.20191028175130-9e7d5ac5ea55 // indirect github.com/docker/go-connections v0.3.0 // indirect github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c // indirect + github.com/docker/go-metrics v0.0.1 // indirect + github.com/docker/libtrust v0.0.0-20150114040149-fa567046d9b1 // indirect + github.com/elazarl/goproxy v0.0.0-20180725130230-947c36da3153 // indirect + github.com/emicklei/go-restful v2.9.5+incompatible // indirect + github.com/evanphx/json-patch v4.9.0+incompatible // indirect + github.com/fsnotify/fsnotify v1.4.9 // indirect + github.com/fullsailor/pkcs7 v0.0.0-20190404230743-d7302db945fa // indirect + github.com/garyburd/redigo v0.0.0-20150301180006-535138d7bcd7 // indirect + github.com/go-openapi/jsonreference v0.19.3 // indirect + github.com/go-openapi/spec v0.19.0 // indirect + github.com/godbus/dbus v0.0.0-20190422162347-ade71ed3457e // indirect github.com/gofrs/flock v0.8.0 // indirect - github.com/gogo/googleapis v1.4.0 // indirect - github.com/gogo/protobuf v1.3.1 // indirect - github.com/golang/mock v1.4.4 // indirect - github.com/google/btree v1.0.0 // indirect - github.com/google/go-cmp v0.5.4 // indirect + github.com/gogo/googleapis v1.4.1 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/mock v1.5.0 // indirect + github.com/golang/protobuf v1.5.0 // indirect + github.com/google/btree v1.0.1 // indirect + github.com/google/go-cmp v0.5.5 // indirect github.com/google/go-github/v32 v32.1.0 // indirect - github.com/google/pprof v0.0.0-20210115211752-39141e76b647 // indirect + github.com/google/gofuzz v1.1.0 // indirect + github.com/google/pprof v0.0.0-20210423192551-a2663126120b // indirect github.com/google/subcommands v1.0.2-0.20190508160503-636abe8753b8 // indirect + github.com/google/uuid v1.2.0 // indirect + github.com/googleapis/gnostic v0.4.0 // indirect + github.com/gorilla/handlers v0.0.0-20150720190736-60c7bfde3e33 // indirect + github.com/gorilla/mux v1.7.2 // indirect + github.com/gorilla/websocket v1.4.2 // indirect github.com/hashicorp/go-multierror v1.1.0 // indirect + github.com/imdario/mergo v0.3.9 // indirect + github.com/jmespath/go-jmespath v0.0.0-20160803190731-bd40a432e4c7 // indirect + github.com/klauspost/compress v1.11.13 // indirect + github.com/konsorten/go-windows-terminal-sequences v1.0.3 // indirect github.com/kr/pty v1.1.4-0.20190131011033-7dc38fb350b1 // indirect + github.com/mailru/easyjson v0.7.0 // indirect + github.com/marstr/guid v1.1.0 // indirect github.com/mattbaird/jsonpatch v0.0.0-20171005235357-81af80346b1a // indirect + github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect + github.com/miekg/pkcs11 v1.0.3 // indirect + github.com/mistifyio/go-zfs v2.1.2-0.20190413222219-f784269be439+incompatible // indirect + github.com/mitchellh/osext v0.0.0-20151018003038-5e2d6d41470f // indirect + github.com/moby/locker v1.0.1 // indirect + github.com/moby/sys/mountinfo v0.4.1 // indirect + github.com/moby/sys/symlink v0.1.0 // indirect + github.com/moby/term v0.0.0-20200312100748-672ec06f55cd // indirect github.com/mohae/deepcopy v0.0.0-20170308212314-bb9b5e7adda9 // indirect - github.com/opencontainers/image-spec v1.0.1 // indirect - github.com/opencontainers/runc v0.1.1 // indirect + github.com/mrunalp/fileutils v0.5.0 // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/ncw/swift v1.0.47 // indirect + github.com/onsi/ginkgo v1.12.1 // indirect + github.com/onsi/gomega v1.10.0 // indirect + github.com/opencontainers/runc v1.0.0-rc90 // indirect github.com/opencontainers/runtime-spec v1.0.2 // indirect + github.com/opencontainers/runtime-tools v0.0.0-20181011054405-1d69bd0f9c39 // indirect + github.com/opencontainers/selinux v1.8.0 // indirect github.com/pborman/uuid v1.2.0 // indirect + github.com/pelletier/go-toml v1.8.1 // indirect + github.com/pquerna/cachecontrol v0.0.0-20171018203845-0dec1b30a021 // indirect + github.com/prometheus/client_golang v1.7.1 // indirect + github.com/prometheus/procfs v0.6.0 // indirect + github.com/satori/go.uuid v1.2.0 // indirect + github.com/seccomp/libseccomp-golang v0.9.1 // indirect github.com/sirupsen/logrus v1.7.0 // indirect + github.com/smartystreets/goconvey v0.0.0-20190330032615-68dc04aab96a // indirect + github.com/stefanberger/go-pkcs11uri v0.0.0-20201008174630-78d3cae3a980 // indirect + github.com/stretchr/objx v0.2.0 // indirect github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2 // indirect + github.com/tchap/go-patricia v2.2.6+incompatible // indirect github.com/vishvananda/netlink v1.0.1-0.20190930145447-2ec5bdc52b86 // indirect github.com/vishvananda/netns v0.0.0-20210104183010-2eb08e3e575f // indirect github.com/xeipuuv/gojsonschema v1.2.0 // indirect + github.com/yvasiyarov/go-metrics v0.0.0-20140926110328-57bccd1ccd43 // indirect + github.com/yvasiyarov/gorelic v0.0.0-20141212073537-a9bba5b9ab50 // indirect + github.com/yvasiyarov/newrelic_platform_go v0.0.0-20140908184405-b21fdbd4370f // indirect + go.etcd.io/bbolt v1.3.5 // indirect + go.etcd.io/etcd v0.5.0-alpha.5.0.20200910180754-dd1b699fc489 // indirect go.uber.org/multierr v1.6.0 // indirect - golang.org/x/net v0.0.0-20201224014010-6772e930b67b // indirect - golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5 // indirect - golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4 // indirect + golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83 // indirect + golang.org/x/net v0.0.0-20210226172049-e18ecbb05110 // indirect + golang.org/x/oauth2 v0.0.0-20210402161424-2e8d93401602 // indirect + golang.org/x/sys v0.0.0-20210314195730-07df6a141424 // indirect golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect golang.org/x/tools v0.1.0 // indirect - google.golang.org/api v0.36.0 // indirect - google.golang.org/grpc v1.36.0-dev.0.20210208035533-9280052d3665 // indirect - google.golang.org/protobuf v1.25.1-0.20201020201750-d3470999428b // indirect + google.golang.org/api v0.42.0 // indirect + google.golang.org/cloud v0.0.0-20151119220103-975617b05ea8 // indirect + google.golang.org/grpc v1.39.0-dev.0.20210518002758-2713b77e8526 // indirect + google.golang.org/protobuf v1.26.0 // indirect + gopkg.in/natefinch/lumberjack.v2 v2.0.0 // indirect + gopkg.in/square/go-jose.v2 v2.5.1 // indirect gopkg.in/yaml.v2 v2.2.8 // indirect + gotest.tools/v3 v3.0.3 // indirect honnef.co/go/tools v0.1.1 // indirect k8s.io/api v0.16.13 // indirect k8s.io/apimachinery v0.16.14-rc.0 // indirect k8s.io/client-go v0.16.13 // indirect + k8s.io/component-base v0.16.13 // indirect + k8s.io/cri-api v0.20.6 // indirect + k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac // indirect + k8s.io/klog/v2 v2.4.0 // indirect + k8s.io/kubernetes v1.13.0 // indirect + k8s.io/utils v0.0.0-20201110183641-67b214c5f920 // indirect + sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.15 // indirect + sigs.k8s.io/structured-merge-diff/v4 v4.0.3 // indirect + sigs.k8s.io/yaml v1.2.0 // indirect ) @@ -1,3 +1,4 @@ +bazil.org/fuse v0.0.0-20160811212531-371fbbdaa898 h1:SC+c6A1qTFstO9qmB86mPV2IpYme/2ZoEQ0hrP+wo+Q= bazil.org/fuse v0.0.0-20160811212531-371fbbdaa898/go.mod h1:Xbm+BRKSBEpa4q4hTSxohYNQpsxXPbPry4JJWOB3LB8= cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= @@ -15,135 +16,361 @@ cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZ cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc= cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY= cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI= -cloud.google.com/go v0.75.0 h1:XgtDnVJRCPEUG21gjFiRPz4zI1Mjg16R+NYQjfmU4XY= -cloud.google.com/go v0.75.0/go.mod h1:VGuuCn7PG0dwsd5XPVm2Mm3wlh3EL55/79EKB6hlPTY= +cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk= +cloud.google.com/go v0.78.0/go.mod h1:QjdrLG0uq+YwhjoVOLsS1t7TW8fs36kLs4XO5R5ECHg= +cloud.google.com/go v0.79.0 h1:oqqswrt4x6b9OGBnNqdssxBl1xf0rSUNjU2BR4BZar0= +cloud.google.com/go v0.79.0/go.mod h1:3bzgcEeQlzbuEAYu4mrWhKqWjmpprinYgKJLgKHnbb8= cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o= cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE= cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc= cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg= cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc= +cloud.google.com/go/bigquery v1.8.0 h1:PQcPefKFdaIzjQFbiyOgAqyx8q5djaE7x9Sqe712DPA= cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ= cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= +cloud.google.com/go/datastore v1.1.0 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v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= +golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= +golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20191004110552-13f9640d40b9/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= @@ -401,8 +909,11 @@ golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81R golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA= golang.org/x/net 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h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U= golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw= golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw= @@ -410,8 +921,12 @@ golang.org/x/oauth2 v0.0.0-20191202225959-858c2ad4c8b6/go.mod h1:gOpvHmFTYa4Iltr golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw= golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A= golang.org/x/oauth2 v0.0.0-20201109201403-9fd604954f58/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A= -golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5 h1:Lm4OryKCca1vehdsWogr9N4t7NfZxLbJoc/H0w4K4S4= golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A= +golang.org/x/oauth2 v0.0.0-20210218202405-ba52d332ba99/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A= +golang.org/x/oauth2 v0.0.0-20210220000619-9bb904979d93/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A= +golang.org/x/oauth2 v0.0.0-20210313182246-cd4f82c27b84/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A= +golang.org/x/oauth2 v0.0.0-20210402161424-2e8d93401602 h1:0Ja1LBD+yisY6RWM/BH7TJVXWsSjs2VwBSmvSX4HdBc= +golang.org/x/oauth2 v0.0.0-20210402161424-2e8d93401602/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A= golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= @@ -420,12 +935,16 @@ golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= -golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck= golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ= +golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sys v0.0.0-20170830134202-bb24a47a89ea/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190209173611-3b5209105503/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= @@ -434,17 +953,25 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7w golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20190616124812-15dcb6c0061f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20190801041406-cbf593c0f2f3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20190812073006-9eafafc0a87e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456/go.mod 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h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20191210023423-ac6580df4449/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200113162924-86b910548bc1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200120151820-655fe14d7479/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= @@ -460,14 +987,25 @@ golang.org/x/sys v0.0.0-20200501052902-10377860bb8e/go.mod h1:h1NjWce9XRLGQEsW7w golang.org/x/sys v0.0.0-20200511232937-7e40ca221e25/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20200909081042-eff7692f9009/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200916030750-2334cc1a136f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20200922070232-aee5d888a860/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20201112073958-5cba982894dd/go.mod 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h1:+39ahH47SWi1PhMRAHfIrm8f69HRZ5K2koXH6dmO8TQ= +golang.org/x/sys v0.0.0-20210314195730-07df6a141424/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw= +golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E= golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= golang.org/x/text v0.0.0-20160726164857-2910a502d2bf/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= @@ -475,12 +1013,15 @@ golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk= golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= -golang.org/x/text v0.3.4 h1:0YWbFKbhXG/wIiuHDSKpS0Iy7FSA+u45VtBMfQcFTTc= golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= +golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ= +golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= +golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/time v0.0.0-20191024005414-555d28b269f0 h1:/5xXl8Y5W96D+TtHSlonuFqGHIWVuyCkGJLwGh9JJFs= golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= +golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20181011042414-1f849cf54d09/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= @@ -489,11 +1030,13 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= +golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= golang.org/x/tools v0.0.0-20190506145303-2d16b83fe98c/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= +golang.org/x/tools v0.0.0-20190624222133-a101b041ded4/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= @@ -520,13 +1063,16 @@ golang.org/x/tools v0.0.0-20200501065659-ab2804fb9c9d/go.mod h1:EkVYQZoAsY45+roY golang.org/x/tools v0.0.0-20200512131952-2bc93b1c0c88/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200515010526-7d3b6ebf133d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= +golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA= golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA= golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA= golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE= golang.org/x/tools v0.0.0-20201110124207-079ba7bd75cd/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA= golang.org/x/tools v0.0.0-20201201161351-ac6f37ff4c2a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA= -golang.org/x/tools v0.0.0-20210108195828-e2f9c7f1fc8e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA= +golang.org/x/tools v0.0.0-20201208233053-a543418bbed2/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA= +golang.org/x/tools v0.0.0-20210105154028-b0ab187a4818/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA= +golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA= golang.org/x/tools v0.1.0 h1:po9/4sTYwZU9lPhi1tOrb4hCv3qrhiQ77LZfGa2OjwY= golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0= golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= @@ -551,8 +1097,11 @@ google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0M google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM= google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc= google.golang.org/api v0.35.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg= -google.golang.org/api v0.36.0 h1:l2Nfbl2GPXdWorv+dT2XfinX2jOOw4zv1VhLstx+6rE= google.golang.org/api v0.36.0/go.mod h1:+z5ficQTmoYpPn8LCUNVpK5I7hwkpjbcgqA7I34qYtE= +google.golang.org/api v0.40.0/go.mod h1:fYKFpnQN0DsDSKRVRcQSDQNtqWPfM9i+zNPxepjRCQ8= +google.golang.org/api v0.41.0/go.mod h1:RkxM5lITDfTzmyKFPt+wGrCJbVfniCr2ool8kTBzRTU= +google.golang.org/api v0.42.0 h1:uqATLkpxiBrhrvFoebXUjvyzE9nQf+pVyy0Z0IHE+fc= +google.golang.org/api v0.42.0/go.mod h1:+Oj4s6ch2SEGtPjGqfUfZonBH0GjQH89gTeKKAEGZKI= google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM= google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= @@ -561,6 +1110,8 @@ google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCID google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc= google.golang.org/appengine v1.6.7 h1:FZR1q0exgwxzPzp/aF+VccGrSfxfPpkBqjIIEq3ru6c= google.golang.org/appengine v1.6.7/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc= +google.golang.org/cloud v0.0.0-20151119220103-975617b05ea8 h1:Cpp2P6TPjujNoC5M2KHY6g7wfyLYfIWRZaSdIKfDasA= +google.golang.org/cloud v0.0.0-20151119220103-975617b05ea8/go.mod h1:0H1ncTHf11KCFhTc/+EFRbzSCOZx+VUbRMk55Yv5MYk= google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc= google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= @@ -585,6 +1136,7 @@ google.golang.org/genproto v0.0.0-20200312145019-da6875a35672/go.mod h1:55QSHmfG google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c= google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c= google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c= +google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c= google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U= google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo= google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA= @@ -593,14 +1145,22 @@ google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6D google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= google.golang.org/genproto v0.0.0-20201109203340-2640f1f9cdfb/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= +google.golang.org/genproto v0.0.0-20201110150050-8816d57aaa9a/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= google.golang.org/genproto v0.0.0-20201201144952-b05cb90ed32e/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= -google.golang.org/genproto v0.0.0-20210108203827-ffc7fda8c3d7 h1:n7yjMkxUgbEahYENvAGVlxMUW8TF/KEavLez31znfDw= -google.golang.org/genproto v0.0.0-20210108203827-ffc7fda8c3d7/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= +google.golang.org/genproto v0.0.0-20201210142538-e3217bee35cc/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= +google.golang.org/genproto v0.0.0-20201214200347-8c77b98c765d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= +google.golang.org/genproto v0.0.0-20210222152913-aa3ee6e6a81c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= +google.golang.org/genproto v0.0.0-20210303154014-9728d6b83eeb/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= +google.golang.org/genproto v0.0.0-20210310155132-4ce2db91004e/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= +google.golang.org/genproto v0.0.0-20210312152112-fc591d9ea70f h1:YRBxgxUW6GFi+AKsn8WGA9k1SZohK+gGuEqdeT5aoNQ= +google.golang.org/genproto v0.0.0-20210312152112-fc591d9ea70f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38= +google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg= google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg= +google.golang.org/grpc v1.24.0/go.mod h1:XDChyiUovWa60DnaeDeZmSW86xtLtjtZbwvSiRnRtcA= google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY= google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk= google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk= @@ -610,10 +1170,13 @@ google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3Iji google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak= google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak= google.golang.org/grpc v1.31.1/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak= +google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0= google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc= google.golang.org/grpc v1.34.0/go.mod h1:WotjhfgOW/POjDeRt8vscBtXq+2VjORFy659qA51WJ8= -google.golang.org/grpc v1.36.0-dev.0.20210208035533-9280052d3665 h1:iGG0ZwQMaxJT/qsL0nnzZCg+4aiWHuQy3MytzLieAjo= -google.golang.org/grpc v1.36.0-dev.0.20210208035533-9280052d3665/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU= +google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU= +google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU= +google.golang.org/grpc v1.39.0-dev.0.20210518002758-2713b77e8526 h1:c+E5hkHV2oYLLcjZ0Uulu4thvOFKB0a9TWvowIWqgu4= +google.golang.org/grpc v1.39.0-dev.0.20210518002758-2713b77e8526/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE= google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8= 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+sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.15 h1:4uqm9Mv+w2MmBYD+F4qf/v6tDFUdPOk29C095RbU5mY= +sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.15/go.mod h1:LEScyzhFmoF5pso/YSeBstl57mOzx9xlU9n85RGrDQg= +sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e h1:4Z09Hglb792X0kfOBBJUPFEyvVfQWrYT/l8h5EKA6JQ= sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI= +sigs.k8s.io/structured-merge-diff/v4 v4.0.3 h1:4oyYo8NREp49LBBhKxEqCulFjg26rawYKrnCmg+Sr6c= +sigs.k8s.io/structured-merge-diff/v4 v4.0.3/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw= sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= +sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q= +sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc= diff --git a/pkg/abi/linux/BUILD b/pkg/abi/linux/BUILD index a461bb65e..38288bdb7 100644 --- a/pkg/abi/linux/BUILD +++ b/pkg/abi/linux/BUILD @@ -15,6 +15,7 @@ go_library( "bpf.go", "capability.go", "clone.go", + "context.go", "dev.go", "elf.go", "epoll.go", @@ -77,6 +78,8 @@ go_library( deps = [ "//pkg/abi", "//pkg/bits", + "//pkg/context", + "//pkg/hostarch", "//pkg/marshal", "//pkg/marshal/primitive", ], diff --git a/pkg/abi/linux/context.go b/pkg/abi/linux/context.go new file mode 100644 index 000000000..d2dbba183 --- /dev/null +++ b/pkg/abi/linux/context.go @@ -0,0 +1,36 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package linux + +import ( + "gvisor.dev/gvisor/pkg/context" +) + +// contextID is the linux package's type for context.Context.Value keys. +type contextID int + +const ( + // CtxSignalNoInfoFunc is a Context.Value key for a function to send signals. + CtxSignalNoInfoFunc contextID = iota +) + +// SignalNoInfoFuncFromContext returns a callback function that can be used to send a +// signal to the given context. +func SignalNoInfoFuncFromContext(ctx context.Context) func(Signal) error { + if f := ctx.Value(CtxSignalNoInfoFunc); f != nil { + return f.(func(Signal) error) + } + return nil +} diff --git a/pkg/abi/linux/ioctl_tun.go b/pkg/abi/linux/ioctl_tun.go index c59c9c136..ea4fdca0f 100644 --- a/pkg/abi/linux/ioctl_tun.go +++ b/pkg/abi/linux/ioctl_tun.go @@ -26,4 +26,7 @@ const ( IFF_TAP = 0x0002 IFF_NO_PI = 0x1000 IFF_NOFILTER = 0x1000 + + // According to linux/if_tun.h "This flag has no real effect" + IFF_ONE_QUEUE = 0x2000 ) diff --git a/pkg/abi/linux/signal.go b/pkg/abi/linux/signal.go index 6ca57ffbb..06a4c6401 100644 --- a/pkg/abi/linux/signal.go +++ b/pkg/abi/linux/signal.go @@ -16,6 +16,7 @@ package linux import ( "gvisor.dev/gvisor/pkg/bits" + "gvisor.dev/gvisor/pkg/hostarch" ) const ( @@ -165,7 +166,7 @@ const ( SIG_IGN = 1 ) -// Signal action flags for rt_sigaction(2), from uapi/asm-generic/signal.h +// Signal action flags for rt_sigaction(2), from uapi/asm-generic/signal.h. const ( SA_NOCLDSTOP = 0x00000001 SA_NOCLDWAIT = 0x00000002 @@ -179,21 +180,17 @@ const ( SA_ONESHOT = SA_RESETHAND ) -// Signal info types. +// Signal stack flags for signalstack(2), from include/uapi/linux/signal.h. const ( - SI_MASK = 0xffff0000 - SI_KILL = 0 << 16 - SI_TIMER = 1 << 16 - SI_POLL = 2 << 16 - SI_FAULT = 3 << 16 - SI_CHLD = 4 << 16 - SI_RT = 5 << 16 - SI_MESGQ = 6 << 16 - SI_SYS = 7 << 16 + SS_ONSTACK = 1 + SS_DISABLE = 2 ) // SIGPOLL si_codes. const ( + // SI_POLL is defined as __SI_POLL in Linux 2.6. + SI_POLL = 2 << 16 + // POLL_IN indicates that data input available. POLL_IN = SI_POLL | 1 @@ -213,6 +210,75 @@ const ( POLL_HUP = SI_POLL | 6 ) +// Possible values for si_code. +const ( + // SI_USER is sent by kill, sigsend, raise. + SI_USER = 0 + + // SI_KERNEL is sent by the kernel from somewhere. + SI_KERNEL = 0x80 + + // SI_QUEUE is sent by sigqueue. + SI_QUEUE = -1 + + // SI_TIMER is sent by timer expiration. + SI_TIMER = -2 + + // SI_MESGQ is sent by real time mesq state change. + SI_MESGQ = -3 + + // SI_ASYNCIO is sent by AIO completion. + SI_ASYNCIO = -4 + + // SI_SIGIO is sent by queued SIGIO. + SI_SIGIO = -5 + + // SI_TKILL is sent by tkill system call. + SI_TKILL = -6 + + // SI_DETHREAD is sent by execve() killing subsidiary threads. + SI_DETHREAD = -7 + + // SI_ASYNCNL is sent by glibc async name lookup completion. + SI_ASYNCNL = -60 +) + +// CLD_* codes are only meaningful for SIGCHLD. +const ( + // CLD_EXITED indicates that a task exited. + CLD_EXITED = 1 + + // CLD_KILLED indicates that a task was killed by a signal. + CLD_KILLED = 2 + + // CLD_DUMPED indicates that a task was killed by a signal and then dumped + // core. + CLD_DUMPED = 3 + + // CLD_TRAPPED indicates that a task was stopped by ptrace. + CLD_TRAPPED = 4 + + // CLD_STOPPED indicates that a thread group completed a group stop. + CLD_STOPPED = 5 + + // CLD_CONTINUED indicates that a group-stopped thread group was continued. + CLD_CONTINUED = 6 +) + +// SYS_* codes are only meaningful for SIGSYS. +const ( + // SYS_SECCOMP indicates that a signal originates from seccomp. + SYS_SECCOMP = 1 +) + +// Possible values for Sigevent.Notify, aka struct sigevent::sigev_notify. +const ( + SIGEV_SIGNAL = 0 + SIGEV_NONE = 1 + SIGEV_THREAD = 2 + SIGEV_THREAD_ID = 4 +) + // Sigevent represents struct sigevent. // // +marshal @@ -227,10 +293,252 @@ type Sigevent struct { UnRemainder [44]byte } -// Possible values for Sigevent.Notify, aka struct sigevent::sigev_notify. -const ( - SIGEV_SIGNAL = 0 - SIGEV_NONE = 1 - SIGEV_THREAD = 2 - SIGEV_THREAD_ID = 4 -) +// SigAction represents struct sigaction. +// +// +marshal +// +stateify savable +type SigAction struct { + Handler uint64 + Flags uint64 + Restorer uint64 + Mask SignalSet +} + +// SignalStack represents information about a user stack, and is equivalent to +// stack_t. +// +// +marshal +// +stateify savable +type SignalStack struct { + Addr uint64 + Flags uint32 + _ uint32 + Size uint64 +} + +// Contains checks if the stack pointer is within this stack. +func (s *SignalStack) Contains(sp hostarch.Addr) bool { + return hostarch.Addr(s.Addr) < sp && sp <= hostarch.Addr(s.Addr+s.Size) +} + +// Top returns the stack's top address. +func (s *SignalStack) Top() hostarch.Addr { + return hostarch.Addr(s.Addr + s.Size) +} + +// IsEnabled returns true iff this signal stack is marked as enabled. +func (s *SignalStack) IsEnabled() bool { + return s.Flags&SS_DISABLE == 0 +} + +// SignalInfo represents information about a signal being delivered, and is +// equivalent to struct siginfo in linux kernel(linux/include/uapi/asm-generic/siginfo.h). +// +// +marshal +// +stateify savable +type SignalInfo struct { + Signo int32 // Signal number + Errno int32 // Errno value + Code int32 // Signal code + _ uint32 + + // struct siginfo::_sifields is a union. In SignalInfo, fields in the union + // are accessed through methods. + // + // For reference, here is the definition of _sifields: (_sigfault._trapno, + // which does not exist on x86, omitted for clarity) + // + // union { + // int _pad[SI_PAD_SIZE]; + // + // /* kill() */ + // struct { + // __kernel_pid_t _pid; /* sender's pid */ + // __ARCH_SI_UID_T _uid; /* sender's uid */ + // } _kill; + // + // /* POSIX.1b timers */ + // struct { + // __kernel_timer_t _tid; /* timer id */ + // int _overrun; /* overrun count */ + // char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)]; + // sigval_t _sigval; /* same as below */ + // int _sys_private; /* not to be passed to user */ + // } _timer; + // + // /* POSIX.1b signals */ + // struct { + // __kernel_pid_t _pid; /* sender's pid */ + // __ARCH_SI_UID_T _uid; /* sender's uid */ + // sigval_t _sigval; + // } _rt; + // + // /* SIGCHLD */ + // struct { + // __kernel_pid_t _pid; /* which child */ + // __ARCH_SI_UID_T _uid; /* sender's uid */ + // int _status; /* exit code */ + // __ARCH_SI_CLOCK_T _utime; + // __ARCH_SI_CLOCK_T _stime; + // } _sigchld; + // + // /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ + // struct { + // void *_addr; /* faulting insn/memory ref. */ + // short _addr_lsb; /* LSB of the reported address */ + // } _sigfault; + // + // /* SIGPOLL */ + // struct { + // __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */ + // int _fd; + // } _sigpoll; + // + // /* SIGSYS */ + // struct { + // void *_call_addr; /* calling user insn */ + // int _syscall; /* triggering system call number */ + // unsigned int _arch; /* AUDIT_ARCH_* of syscall */ + // } _sigsys; + // } _sifields; + // + // _sifields is padded so that the size of siginfo is SI_MAX_SIZE = 128 + // bytes. + Fields [128 - 16]byte +} + +// FixSignalCodeForUser fixes up si_code. +// +// The si_code we get from Linux may contain the kernel-specific code in the +// top 16 bits if it's positive (e.g., from ptrace). Linux's +// copy_siginfo_to_user does +// err |= __put_user((short)from->si_code, &to->si_code); +// to mask out those bits and we need to do the same. +func (s *SignalInfo) FixSignalCodeForUser() { + if s.Code > 0 { + s.Code &= 0x0000ffff + } +} + +// PID returns the si_pid field. +func (s *SignalInfo) PID() int32 { + return int32(hostarch.ByteOrder.Uint32(s.Fields[0:4])) +} + +// SetPID mutates the si_pid field. +func (s *SignalInfo) SetPID(val int32) { + hostarch.ByteOrder.PutUint32(s.Fields[0:4], uint32(val)) +} + +// UID returns the si_uid field. +func (s *SignalInfo) UID() int32 { + return int32(hostarch.ByteOrder.Uint32(s.Fields[4:8])) +} + +// SetUID mutates the si_uid field. +func (s *SignalInfo) SetUID(val int32) { + hostarch.ByteOrder.PutUint32(s.Fields[4:8], uint32(val)) +} + +// Sigval returns the sigval field, which is aliased to both si_int and si_ptr. +func (s *SignalInfo) Sigval() uint64 { + return hostarch.ByteOrder.Uint64(s.Fields[8:16]) +} + +// SetSigval mutates the sigval field. +func (s *SignalInfo) SetSigval(val uint64) { + hostarch.ByteOrder.PutUint64(s.Fields[8:16], val) +} + +// TimerID returns the si_timerid field. +func (s *SignalInfo) TimerID() TimerID { + return TimerID(hostarch.ByteOrder.Uint32(s.Fields[0:4])) +} + +// SetTimerID sets the si_timerid field. +func (s *SignalInfo) SetTimerID(val TimerID) { + hostarch.ByteOrder.PutUint32(s.Fields[0:4], uint32(val)) +} + +// Overrun returns the si_overrun field. +func (s *SignalInfo) Overrun() int32 { + return int32(hostarch.ByteOrder.Uint32(s.Fields[4:8])) +} + +// SetOverrun sets the si_overrun field. +func (s *SignalInfo) SetOverrun(val int32) { + hostarch.ByteOrder.PutUint32(s.Fields[4:8], uint32(val)) +} + +// Addr returns the si_addr field. +func (s *SignalInfo) Addr() uint64 { + return hostarch.ByteOrder.Uint64(s.Fields[0:8]) +} + +// SetAddr sets the si_addr field. +func (s *SignalInfo) SetAddr(val uint64) { + hostarch.ByteOrder.PutUint64(s.Fields[0:8], val) +} + +// Status returns the si_status field. +func (s *SignalInfo) Status() int32 { + return int32(hostarch.ByteOrder.Uint32(s.Fields[8:12])) +} + +// SetStatus mutates the si_status field. +func (s *SignalInfo) SetStatus(val int32) { + hostarch.ByteOrder.PutUint32(s.Fields[8:12], uint32(val)) +} + +// CallAddr returns the si_call_addr field. +func (s *SignalInfo) CallAddr() uint64 { + return hostarch.ByteOrder.Uint64(s.Fields[0:8]) +} + +// SetCallAddr mutates the si_call_addr field. +func (s *SignalInfo) SetCallAddr(val uint64) { + hostarch.ByteOrder.PutUint64(s.Fields[0:8], val) +} + +// Syscall returns the si_syscall field. +func (s *SignalInfo) Syscall() int32 { + return int32(hostarch.ByteOrder.Uint32(s.Fields[8:12])) +} + +// SetSyscall mutates the si_syscall field. +func (s *SignalInfo) SetSyscall(val int32) { + hostarch.ByteOrder.PutUint32(s.Fields[8:12], uint32(val)) +} + +// Arch returns the si_arch field. +func (s *SignalInfo) Arch() uint32 { + return hostarch.ByteOrder.Uint32(s.Fields[12:16]) +} + +// SetArch mutates the si_arch field. +func (s *SignalInfo) SetArch(val uint32) { + hostarch.ByteOrder.PutUint32(s.Fields[12:16], val) +} + +// Band returns the si_band field. +func (s *SignalInfo) Band() int64 { + return int64(hostarch.ByteOrder.Uint64(s.Fields[0:8])) +} + +// SetBand mutates the si_band field. +func (s *SignalInfo) SetBand(val int64) { + // Note: this assumes the platform uses `long` as `__ARCH_SI_BAND_T`. + // On some platforms, which gVisor doesn't support, `__ARCH_SI_BAND_T` is + // `int`. See siginfo.h. + hostarch.ByteOrder.PutUint64(s.Fields[0:8], uint64(val)) +} + +// FD returns the si_fd field. +func (s *SignalInfo) FD() uint32 { + return hostarch.ByteOrder.Uint32(s.Fields[8:12]) +} + +// SetFD mutates the si_fd field. +func (s *SignalInfo) SetFD(val uint32) { + hostarch.ByteOrder.PutUint32(s.Fields[8:12], val) +} diff --git a/pkg/abi/linux/xattr.go b/pkg/abi/linux/xattr.go index 8ef837f27..1fa7a4f4f 100644 --- a/pkg/abi/linux/xattr.go +++ b/pkg/abi/linux/xattr.go @@ -23,6 +23,12 @@ const ( XATTR_CREATE = 1 XATTR_REPLACE = 2 + XATTR_SECURITY_PREFIX = "security." + XATTR_SECURITY_PREFIX_LEN = len(XATTR_SECURITY_PREFIX) + + XATTR_SYSTEM_PREFIX = "system." + XATTR_SYSTEM_PREFIX_LEN = len(XATTR_SYSTEM_PREFIX) + XATTR_TRUSTED_PREFIX = "trusted." XATTR_TRUSTED_PREFIX_LEN = len(XATTR_TRUSTED_PREFIX) diff --git a/pkg/buffer/BUILD b/pkg/buffer/BUILD index 2a2e3d1aa..19cd28a32 100644 --- a/pkg/buffer/BUILD +++ b/pkg/buffer/BUILD @@ -21,7 +21,6 @@ go_library( "buffer.go", "buffer_list.go", "pool.go", - "safemem.go", "view.go", "view_unsafe.go", ], @@ -29,8 +28,6 @@ go_library( deps = [ "//pkg/context", "//pkg/log", - "//pkg/safemem", - "//pkg/usermem", ], ) @@ -40,12 +37,10 @@ go_test( srcs = [ "buffer_test.go", "pool_test.go", - "safemem_test.go", "view_test.go", ], library = ":buffer", deps = [ - "//pkg/safemem", "//pkg/state", ], ) diff --git a/pkg/buffer/safemem.go b/pkg/buffer/safemem.go deleted file mode 100644 index 8b42575b4..000000000 --- a/pkg/buffer/safemem.go +++ /dev/null @@ -1,133 +0,0 @@ -// Copyright 2020 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "gvisor.dev/gvisor/pkg/safemem" -) - -// WriteBlock returns this buffer as a write Block. -func (b *buffer) WriteBlock() safemem.Block { - return safemem.BlockFromSafeSlice(b.WriteSlice()) -} - -// ReadBlock returns this buffer as a read Block. -func (b *buffer) ReadBlock() safemem.Block { - return safemem.BlockFromSafeSlice(b.ReadSlice()) -} - -// WriteFromSafememReader writes up to count bytes from r to v and advances the -// write index by the number of bytes written. It calls r.ReadToBlocks() at -// most once. -func (v *View) WriteFromSafememReader(r safemem.Reader, count uint64) (uint64, error) { - if count == 0 { - return 0, nil - } - - var ( - dst safemem.BlockSeq - blocks []safemem.Block - ) - - // Need at least one buffer. - firstBuf := v.data.Back() - if firstBuf == nil { - firstBuf = v.pool.get() - v.data.PushBack(firstBuf) - } - - // Does the last block have sufficient capacity alone? - if l := uint64(firstBuf.WriteSize()); l >= count { - dst = safemem.BlockSeqOf(firstBuf.WriteBlock().TakeFirst64(count)) - } else { - // Append blocks until sufficient. - count -= l - blocks = append(blocks, firstBuf.WriteBlock()) - for count > 0 { - emptyBuf := v.pool.get() - v.data.PushBack(emptyBuf) - block := emptyBuf.WriteBlock().TakeFirst64(count) - count -= uint64(block.Len()) - blocks = append(blocks, block) - } - dst = safemem.BlockSeqFromSlice(blocks) - } - - // Perform I/O. - n, err := r.ReadToBlocks(dst) - v.size += int64(n) - - // Update all indices. - for left := n; left > 0; firstBuf = firstBuf.Next() { - if l := firstBuf.WriteSize(); left >= uint64(l) { - firstBuf.WriteMove(l) // Whole block. - left -= uint64(l) - } else { - firstBuf.WriteMove(int(left)) // Partial block. - left = 0 - } - } - - return n, err -} - -// WriteFromBlocks implements safemem.Writer.WriteFromBlocks. It advances the -// write index by the number of bytes written. -func (v *View) WriteFromBlocks(srcs safemem.BlockSeq) (uint64, error) { - return v.WriteFromSafememReader(&safemem.BlockSeqReader{srcs}, srcs.NumBytes()) -} - -// ReadToSafememWriter reads up to count bytes from v to w. It does not advance -// the read index. It calls w.WriteFromBlocks() at most once. -func (v *View) ReadToSafememWriter(w safemem.Writer, count uint64) (uint64, error) { - if count == 0 { - return 0, nil - } - - var ( - src safemem.BlockSeq - blocks []safemem.Block - ) - - firstBuf := v.data.Front() - if firstBuf == nil { - return 0, nil // No EOF. - } - - // Is all the data in a single block? - if l := uint64(firstBuf.ReadSize()); l >= count { - src = safemem.BlockSeqOf(firstBuf.ReadBlock().TakeFirst64(count)) - } else { - // Build a list of all the buffers. - count -= l - blocks = append(blocks, firstBuf.ReadBlock()) - for buf := firstBuf.Next(); buf != nil && count > 0; buf = buf.Next() { - block := buf.ReadBlock().TakeFirst64(count) - count -= uint64(block.Len()) - blocks = append(blocks, block) - } - src = safemem.BlockSeqFromSlice(blocks) - } - - // Perform I/O. As documented, we don't advance the read index. - return w.WriteFromBlocks(src) -} - -// ReadToBlocks implements safemem.Reader.ReadToBlocks. It does not advance the -// read index by the number of bytes read, such that it's only safe to call if -// the caller guarantees that ReadToBlocks will only be called once. -func (v *View) ReadToBlocks(dsts safemem.BlockSeq) (uint64, error) { - return v.ReadToSafememWriter(&safemem.BlockSeqWriter{dsts}, dsts.NumBytes()) -} diff --git a/pkg/buffer/safemem_test.go b/pkg/buffer/safemem_test.go deleted file mode 100644 index 721cc5934..000000000 --- a/pkg/buffer/safemem_test.go +++ /dev/null @@ -1,172 +0,0 @@ -// Copyright 2020 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "bytes" - "strings" - "testing" - - "gvisor.dev/gvisor/pkg/safemem" -) - -func TestSafemem(t *testing.T) { - const bufferSize = defaultBufferSize - - testCases := []struct { - name string - input string - output string - readLen int - op func(*View) - }{ - // Basic coverage. - { - name: "short", - input: "010", - output: "010", - }, - { - name: "long", - input: "0" + strings.Repeat("1", bufferSize) + "0", - output: "0" + strings.Repeat("1", bufferSize) + "0", - }, - { - name: "short-read", - input: "0", - readLen: 100, // > size. - output: "0", - }, - { - name: "zero-read", - input: "0", - output: "", - }, - { - name: "read-empty", - input: "", - readLen: 1, // > size. - output: "", - }, - - // Ensure offsets work. - { - name: "offsets-short", - input: "012", - output: "2", - op: func(v *View) { - v.TrimFront(2) - }, - }, - { - name: "offsets-long0", - input: "0" + strings.Repeat("1", bufferSize) + "0", - output: strings.Repeat("1", bufferSize) + "0", - op: func(v *View) { - v.TrimFront(1) - }, - }, - { - name: "offsets-long1", - input: "0" + strings.Repeat("1", bufferSize) + "0", - output: strings.Repeat("1", bufferSize-1) + "0", - op: func(v *View) { - v.TrimFront(2) - }, - }, - { - name: "offsets-long2", - input: "0" + strings.Repeat("1", bufferSize) + "0", - output: "10", - op: func(v *View) { - v.TrimFront(bufferSize) - }, - }, - - // Ensure truncation works. - { - name: "truncate-short", - input: "012", - output: "01", - op: func(v *View) { - v.Truncate(2) - }, - }, - { - name: "truncate-long0", - input: "0" + strings.Repeat("1", bufferSize) + "0", - output: "0" + strings.Repeat("1", bufferSize), - op: func(v *View) { - v.Truncate(bufferSize + 1) - }, - }, - { - name: "truncate-long1", - input: "0" + strings.Repeat("1", bufferSize) + "0", - output: "0" + strings.Repeat("1", bufferSize-1), - op: func(v *View) { - v.Truncate(bufferSize) - }, - }, - { - name: "truncate-long2", - input: "0" + strings.Repeat("1", bufferSize) + "0", - output: "01", - op: func(v *View) { - v.Truncate(2) - }, - }, - } - - for _, tc := range testCases { - t.Run(tc.name, func(t *testing.T) { - // Construct the new view. - var view View - bs := safemem.BlockSeqOf(safemem.BlockFromSafeSlice([]byte(tc.input))) - n, err := view.WriteFromBlocks(bs) - if err != nil { - t.Errorf("expected err nil, got %v", err) - } - if n != uint64(len(tc.input)) { - t.Errorf("expected %d bytes, got %d", len(tc.input), n) - } - - // Run the operation. - if tc.op != nil { - tc.op(&view) - } - - // Read and validate. - readLen := tc.readLen - if readLen == 0 { - readLen = len(tc.output) // Default. - } - out := make([]byte, readLen) - bs = safemem.BlockSeqOf(safemem.BlockFromSafeSlice(out)) - n, err = view.ReadToBlocks(bs) - if err != nil { - t.Errorf("expected nil, got %v", err) - } - if n != uint64(len(tc.output)) { - t.Errorf("expected %d bytes, got %d", len(tc.output), n) - } - - // Ensure the contents are correct. - if !bytes.Equal(out[:n], []byte(tc.output[:n])) { - t.Errorf("contents are wrong: expected %q, got %q", tc.output, string(out)) - } - }) - } -} diff --git a/pkg/linuxerr/BUILD b/pkg/linuxerr/BUILD new file mode 100644 index 000000000..c5abbd34f --- /dev/null +++ b/pkg/linuxerr/BUILD @@ -0,0 +1,20 @@ +load("//tools:defs.bzl", "go_library", "go_test") + +package(licenses = ["notice"]) + +go_library( + name = "linuxerr", + srcs = ["linuxerr.go"], + visibility = ["//visibility:public"], + deps = ["//pkg/abi/linux"], +) + +go_test( + name = "linuxerr_test", + srcs = ["linuxerr_test.go"], + deps = [ + ":linuxerr", + "//pkg/syserror", + "@org_golang_x_sys//unix:go_default_library", + ], +) diff --git a/pkg/linuxerr/linuxerr.go b/pkg/linuxerr/linuxerr.go new file mode 100644 index 000000000..f45caaadf --- /dev/null +++ b/pkg/linuxerr/linuxerr.go @@ -0,0 +1,184 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package linuxerr contains syscall error codes exported as an error interface +// pointers. This allows for fast comparison and return operations comperable +// to unix.Errno constants. +package linuxerr + +import ( + "gvisor.dev/gvisor/pkg/abi/linux" +) + +// Error represents a syscall errno with a descriptive message. +type Error struct { + errno linux.Errno + message string +} + +func new(err linux.Errno, message string) *Error { + return &Error{ + errno: err, + message: message, + } +} + +// Error implements error.Error. +func (e *Error) Error() string { return e.message } + +// Errno returns the underlying linux.Errno value. +func (e *Error) Errno() linux.Errno { return e.errno } + +// The following varables have the same meaning as their errno equivalent. + +// Errno values from include/uapi/asm-generic/errno-base.h. +var ( + EPERM = new(linux.EPERM, "operation not permitted") + ENOENT = new(linux.ENOENT, "no such file or directory") + ESRCH = new(linux.ESRCH, "no such process") + EINTR = new(linux.EINTR, "interrupted system call") + EIO = new(linux.EIO, "I/O error") + ENXIO = new(linux.ENXIO, "no such device or address") + E2BIG = new(linux.E2BIG, "argument list too long") + ENOEXEC = new(linux.ENOEXEC, "exec format error") + EBADF = new(linux.EBADF, "bad file number") + ECHILD = new(linux.ECHILD, "no child processes") + EAGAIN = new(linux.EAGAIN, "try again") + ENOMEM = new(linux.ENOMEM, "out of memory") + EACCES = new(linux.EACCES, "permission denied") + EFAULT = new(linux.EFAULT, "bad address") + ENOTBLK = new(linux.ENOTBLK, "block device required") + EBUSY = new(linux.EBUSY, "device or resource busy") + EEXIST = new(linux.EEXIST, "file exists") + EXDEV = new(linux.EXDEV, "cross-device link") + ENODEV = new(linux.ENODEV, "no such device") + ENOTDIR = new(linux.ENOTDIR, "not a directory") + EISDIR = new(linux.EISDIR, "is a directory") + EINVAL = new(linux.EINVAL, "invalid argument") + ENFILE = new(linux.ENFILE, "file table overflow") + EMFILE = new(linux.EMFILE, "too many open files") + ENOTTY = new(linux.ENOTTY, "not a typewriter") + ETXTBSY = new(linux.ETXTBSY, "text file busy") + EFBIG = new(linux.EFBIG, "file too large") + ENOSPC = new(linux.ENOSPC, "no space left on device") + ESPIPE = new(linux.ESPIPE, "illegal seek") + EROFS = new(linux.EROFS, "read-only file system") + EMLINK = new(linux.EMLINK, "too many links") + EPIPE = new(linux.EPIPE, "broken pipe") + EDOM = new(linux.EDOM, "math argument out of domain of func") + ERANGE = new(linux.ERANGE, "math result not representable") +) + +// Errno values from include/uapi/asm-generic/errno.h. +var ( + EDEADLK = new(linux.EDEADLK, "resource deadlock would occur") + ENAMETOOLONG = new(linux.ENAMETOOLONG, "file name too long") + ENOLCK = new(linux.ENOLCK, "no record locks available") + ENOSYS = new(linux.ENOSYS, "invalid system call number") + ENOTEMPTY = new(linux.ENOTEMPTY, "directory not empty") + ELOOP = new(linux.ELOOP, "too many symbolic links encountered") + EWOULDBLOCK = new(linux.EWOULDBLOCK, "operation would block") + ENOMSG = new(linux.ENOMSG, "no message of desired type") + EIDRM = new(linux.EIDRM, "identifier removed") + ECHRNG = new(linux.ECHRNG, "channel number out of range") + EL2NSYNC = new(linux.EL2NSYNC, "level 2 not synchronized") + EL3HLT = new(linux.EL3HLT, "level 3 halted") + EL3RST = new(linux.EL3RST, "level 3 reset") + ELNRNG = new(linux.ELNRNG, "link number out of range") + EUNATCH = new(linux.EUNATCH, "protocol driver not attached") + ENOCSI = new(linux.ENOCSI, "no CSI structure available") + EL2HLT = new(linux.EL2HLT, "level 2 halted") + EBADE = new(linux.EBADE, "invalid exchange") + EBADR = new(linux.EBADR, "invalid request descriptor") + EXFULL = new(linux.EXFULL, "exchange full") + ENOANO = new(linux.ENOANO, "no anode") + EBADRQC = new(linux.EBADRQC, "invalid request code") + EBADSLT = new(linux.EBADSLT, "invalid slot") + EDEADLOCK = new(linux.EDEADLOCK, EDEADLK.message) + EBFONT = new(linux.EBFONT, "bad font file format") + ENOSTR = new(linux.ENOSTR, "device not a stream") + ENODATA = new(linux.ENODATA, "no data available") + ETIME = new(linux.ETIME, "timer expired") + ENOSR = new(linux.ENOSR, "out of streams resources") + ENONET = new(linux.ENOENT, "machine is not on the network") + ENOPKG = new(linux.ENOPKG, "package not installed") + EREMOTE = new(linux.EREMOTE, "object is remote") + ENOLINK = new(linux.ENOLINK, "link has been severed") + EADV = new(linux.EADV, "advertise error") + ESRMNT = new(linux.ESRMNT, "srmount error") + ECOMM = new(linux.ECOMM, "communication error on send") + EPROTO = new(linux.EPROTO, "protocol error") + EMULTIHOP = new(linux.EMULTIHOP, "multihop attempted") + EDOTDOT = new(linux.EDOTDOT, "RFS specific error") + EBADMSG = new(linux.EBADMSG, "not a data message") + EOVERFLOW = new(linux.EOVERFLOW, "value too large for defined data type") + ENOTUNIQ = new(linux.ENOTUNIQ, "name not unique on network") + EBADFD = new(linux.EBADFD, "file descriptor in bad state") + EREMCHG = new(linux.EREMCHG, "remote address changed") + ELIBACC = new(linux.ELIBACC, "can not access a needed shared library") + ELIBBAD = new(linux.ELIBBAD, "accessing a corrupted shared library") + ELIBSCN = new(linux.ELIBSCN, ".lib section in a.out corrupted") + ELIBMAX = new(linux.ELIBMAX, "attempting to link in too many shared libraries") + ELIBEXEC = new(linux.ELIBEXEC, "cannot exec a shared library directly") + EILSEQ = new(linux.EILSEQ, "illegal byte sequence") + ERESTART = new(linux.ERESTART, "interrupted system call should be restarted") + ESTRPIPE = new(linux.ESTRPIPE, "streams pipe error") + EUSERS = new(linux.EUSERS, "too many users") + ENOTSOCK = new(linux.ENOTSOCK, "socket operation on non-socket") + EDESTADDRREQ = new(linux.EDESTADDRREQ, "destination address required") + EMSGSIZE = new(linux.EMSGSIZE, "message too long") + EPROTOTYPE = new(linux.EPROTOTYPE, "protocol wrong type for socket") + ENOPROTOOPT = new(linux.ENOPROTOOPT, "protocol not available") + EPROTONOSUPPORT = new(linux.EPROTONOSUPPORT, "protocol not supported") + ESOCKTNOSUPPORT = new(linux.ESOCKTNOSUPPORT, "socket type not supported") + EOPNOTSUPP = new(linux.EOPNOTSUPP, "operation not supported on transport endpoint") + EPFNOSUPPORT = new(linux.EPFNOSUPPORT, "protocol family not supported") + EAFNOSUPPORT = new(linux.EAFNOSUPPORT, "address family not supported by protocol") + EADDRINUSE = new(linux.EADDRINUSE, "address already in use") + EADDRNOTAVAIL = new(linux.EADDRNOTAVAIL, "cannot assign requested address") + ENETDOWN = new(linux.ENETDOWN, "network is down") + ENETUNREACH = new(linux.ENETUNREACH, "network is unreachable") + ENETRESET = new(linux.ENETRESET, "network dropped connection because of reset") + ECONNABORTED = new(linux.ECONNABORTED, "software caused connection abort") + ECONNRESET = new(linux.ECONNRESET, "connection reset by peer") + ENOBUFS = new(linux.ENOBUFS, "no buffer space available") + EISCONN = new(linux.EISCONN, "transport endpoint is already connected") + ENOTCONN = new(linux.ENOTCONN, "transport endpoint is not connected") + ESHUTDOWN = new(linux.ESHUTDOWN, "cannot send after transport endpoint shutdown") + ETOOMANYREFS = new(linux.ETOOMANYREFS, "too many references: cannot splice") + ETIMEDOUT = new(linux.ETIMEDOUT, "connection timed out") + ECONNREFUSED = new(linux.ECONNREFUSED, "connection refused") + EHOSTDOWN = new(linux.EHOSTDOWN, "host is down") + EHOSTUNREACH = new(linux.EHOSTUNREACH, "no route to host") + EALREADY = new(linux.EALREADY, "operation already in progress") + EINPROGRESS = new(linux.EINPROGRESS, "operation now in progress") + ESTALE = new(linux.ESTALE, "stale file handle") + EUCLEAN = new(linux.EUCLEAN, "structure needs cleaning") + ENOTNAM = new(linux.ENOTNAM, "not a XENIX named type file") + ENAVAIL = new(linux.ENAVAIL, "no XENIX semaphores available") + EISNAM = new(linux.EISNAM, "is a named type file") + EREMOTEIO = new(linux.EREMOTEIO, "remote I/O error") + EDQUOT = new(linux.EDQUOT, "quota exceeded") + ENOMEDIUM = new(linux.ENOMEDIUM, "no medium found") + EMEDIUMTYPE = new(linux.EMEDIUMTYPE, "wrong medium type") + ECANCELED = new(linux.ECANCELED, "operation Canceled") + ENOKEY = new(linux.ENOKEY, "required key not available") + EKEYEXPIRED = new(linux.EKEYEXPIRED, "key has expired") + EKEYREVOKED = new(linux.EKEYREVOKED, "key has been revoked") + EKEYREJECTED = new(linux.EKEYREJECTED, "key was rejected by service") + EOWNERDEAD = new(linux.EOWNERDEAD, "owner died") + ENOTRECOVERABLE = new(linux.ENOTRECOVERABLE, "state not recoverable") + ERFKILL = new(linux.ERFKILL, "operation not possible due to RF-kill") + EHWPOISON = new(linux.EHWPOISON, "memory page has hardware error") +) diff --git a/pkg/syserror/syserror_test.go b/pkg/linuxerr/linuxerr_test.go index c141e5f6e..d34937e93 100644 --- a/pkg/syserror/syserror_test.go +++ b/pkg/linuxerr/linuxerr_test.go @@ -19,6 +19,7 @@ import ( "testing" "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/linuxerr" "gvisor.dev/gvisor/pkg/syserror" ) @@ -30,7 +31,13 @@ func BenchmarkAssignErrno(b *testing.B) { } } -func BenchmarkAssignError(b *testing.B) { +func BenchmarkLinuxerrAssignError(b *testing.B) { + for i := b.N; i > 0; i-- { + globalError = linuxerr.EINVAL + } +} + +func BenchmarkAssignSyserrorError(b *testing.B) { for i := b.N; i > 0; i-- { globalError = syserror.EINVAL } @@ -46,7 +53,17 @@ func BenchmarkCompareErrno(b *testing.B) { } } -func BenchmarkCompareError(b *testing.B) { +func BenchmarkCompareLinuxerrError(b *testing.B) { + globalError = linuxerr.E2BIG + j := 0 + for i := b.N; i > 0; i-- { + if globalError == linuxerr.EINVAL { + j++ + } + } +} + +func BenchmarkCompareSyserrorError(b *testing.B) { globalError = syserror.EAGAIN j := 0 for i := b.N; i > 0; i-- { @@ -62,7 +79,7 @@ func BenchmarkSwitchErrno(b *testing.B) { for i := b.N; i > 0; i-- { switch globalError { case unix.EINVAL: - j += 1 + j++ case unix.EINTR: j += 2 case unix.EAGAIN: @@ -71,13 +88,28 @@ func BenchmarkSwitchErrno(b *testing.B) { } } -func BenchmarkSwitchError(b *testing.B) { +func BenchmarkSwitchLinuxerrError(b *testing.B) { + globalError = linuxerr.EPERM + j := 0 + for i := b.N; i > 0; i-- { + switch globalError { + case linuxerr.EINVAL: + j++ + case linuxerr.EINTR: + j += 2 + case linuxerr.EAGAIN: + j += 3 + } + } +} + +func BenchmarkSwitchSyserrorError(b *testing.B) { globalError = syserror.EPERM j := 0 for i := b.N; i > 0; i-- { switch globalError { case syserror.EINVAL: - j += 1 + j++ case syserror.EINTR: j += 2 case syserror.EAGAIN: diff --git a/pkg/marshal/primitive/BUILD b/pkg/marshal/primitive/BUILD index 190b57c29..6e5ce136d 100644 --- a/pkg/marshal/primitive/BUILD +++ b/pkg/marshal/primitive/BUILD @@ -12,9 +12,7 @@ go_library( "//:sandbox", ], deps = [ - "//pkg/context", "//pkg/hostarch", "//pkg/marshal", - "//pkg/usermem", ], ) diff --git a/pkg/marshal/primitive/primitive.go b/pkg/marshal/primitive/primitive.go index 6f38992b7..1c49cf082 100644 --- a/pkg/marshal/primitive/primitive.go +++ b/pkg/marshal/primitive/primitive.go @@ -19,10 +19,8 @@ package primitive import ( "io" - "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/marshal" - "gvisor.dev/gvisor/pkg/usermem" ) // Int8 is a marshal.Marshallable implementation for int8. @@ -400,26 +398,3 @@ func CopyStringOut(cc marshal.CopyContext, addr hostarch.Addr, src string) (int, srcP := ByteSlice(src) return srcP.CopyOut(cc, addr) } - -// IOCopyContext wraps an object implementing hostarch.IO to implement -// marshal.CopyContext. -type IOCopyContext struct { - Ctx context.Context - IO usermem.IO - Opts usermem.IOOpts -} - -// CopyScratchBuffer implements marshal.CopyContext.CopyScratchBuffer. -func (i *IOCopyContext) CopyScratchBuffer(size int) []byte { - return make([]byte, size) -} - -// CopyOutBytes implements marshal.CopyContext.CopyOutBytes. -func (i *IOCopyContext) CopyOutBytes(addr hostarch.Addr, b []byte) (int, error) { - return i.IO.CopyOut(i.Ctx, addr, b, i.Opts) -} - -// CopyInBytes implements marshal.CopyContext.CopyInBytes. -func (i *IOCopyContext) CopyInBytes(addr hostarch.Addr, b []byte) (int, error) { - return i.IO.CopyIn(i.Ctx, addr, b, i.Opts) -} diff --git a/pkg/metric/metric.go b/pkg/metric/metric.go index e822fe77d..4829ae7ce 100644 --- a/pkg/metric/metric.go +++ b/pkg/metric/metric.go @@ -37,9 +37,21 @@ var ( ErrInitializationDone = errors.New("metric cannot be created after initialization is complete") // WeirdnessMetric is a metric with fields created to track the number - // of weird occurrences such as time fallback, partial_result and - // vsyscall count. - WeirdnessMetric *Uint64Metric + // of weird occurrences such as time fallback, partial_result, vsyscall + // count, watchdog startup timeouts and stuck tasks. + WeirdnessMetric = MustCreateNewUint64Metric("/weirdness", true /* sync */, "Increment for weird occurrences of problems such as time fallback, partial result, vsyscalls invoked in the sandbox, watchdog startup timeouts and stuck tasks.", + Field{ + name: "weirdness_type", + allowedValues: []string{"time_fallback", "partial_result", "vsyscall_count", "watchdog_stuck_startup", "watchdog_stuck_tasks"}, + }) + + // SuspiciousOperationsMetric is a metric with fields created to detect + // operations such as opening an executable file to write from a gofer. + SuspiciousOperationsMetric = MustCreateNewUint64Metric("/suspicious_operations", true /* sync */, "Increment for suspicious operations such as opening an executable file to write from a gofer.", + Field{ + name: "operation_type", + allowedValues: []string{"opened_write_execute_file"}, + }) ) // Uint64Metric encapsulates a uint64 that represents some kind of metric to be @@ -77,17 +89,21 @@ var ( // Precondition: // * All metrics are registered. // * Initialize/Disable has not been called. -func Initialize() { +func Initialize() error { if initialized { - panic("Initialize/Disable called more than once") + return errors.New("metric.Initialize called after metric.Initialize or metric.Disable") } - initialized = true m := pb.MetricRegistration{} for _, v := range allMetrics.m { m.Metrics = append(m.Metrics, v.metadata) } - eventchannel.Emit(&m) + if err := eventchannel.Emit(&m); err != nil { + return fmt.Errorf("unable to emit metric initialize event: %w", err) + } + + initialized = true + return nil } // Disable sends an empty metric registration event over the event channel, @@ -96,16 +112,18 @@ func Initialize() { // Precondition: // * All metrics are registered. // * Initialize/Disable has not been called. -func Disable() { +func Disable() error { if initialized { - panic("Initialize/Disable called more than once") + return errors.New("metric.Disable called after metric.Initialize or metric.Disable") } - initialized = true m := pb.MetricRegistration{} if err := eventchannel.Emit(&m); err != nil { - panic("unable to emit metric disable event: " + err.Error()) + return fmt.Errorf("unable to emit metric disable event: %w", err) } + + initialized = true + return nil } type customUint64Metric struct { @@ -158,8 +176,8 @@ func RegisterCustomUint64Metric(name string, cumulative, sync bool, units pb.Met } // Metrics can exist without fields. - if len(fields) > 1 { - panic("Sentry metrics support at most one field") + if l := len(fields); l > 1 { + return fmt.Errorf("%d fields provided, must be <= 1", l) } for _, field := range fields { @@ -175,7 +193,7 @@ func RegisterCustomUint64Metric(name string, cumulative, sync bool, units pb.Met // without fields and panics if it returns an error. func MustRegisterCustomUint64Metric(name string, cumulative, sync bool, description string, value func(...string) uint64, fields ...Field) { if err := RegisterCustomUint64Metric(name, cumulative, sync, pb.MetricMetadata_UNITS_NONE, description, value, fields...); err != nil { - panic(fmt.Sprintf("Unable to register metric %q: %v", name, err)) + panic(fmt.Sprintf("Unable to register metric %q: %s", name, err)) } } @@ -202,7 +220,7 @@ func NewUint64Metric(name string, sync bool, units pb.MetricMetadata_Units, desc func MustCreateNewUint64Metric(name string, sync bool, description string, fields ...Field) *Uint64Metric { m, err := NewUint64Metric(name, sync, pb.MetricMetadata_UNITS_NONE, description, fields...) if err != nil { - panic(fmt.Sprintf("Unable to create metric %q: %v", name, err)) + panic(fmt.Sprintf("Unable to create metric %q: %s", name, err)) } return m } @@ -212,7 +230,7 @@ func MustCreateNewUint64Metric(name string, sync bool, description string, field func MustCreateNewUint64NanosecondsMetric(name string, sync bool, description string) *Uint64Metric { m, err := NewUint64Metric(name, sync, pb.MetricMetadata_UNITS_NANOSECONDS, description) if err != nil { - panic(fmt.Sprintf("Unable to create metric %q: %v", name, err)) + panic(fmt.Sprintf("Unable to create metric %q: %s", name, err)) } return m } @@ -347,7 +365,7 @@ func EmitMetricUpdate() { m.Metrics = append(m.Metrics, &pb.MetricValue{ Name: k, - Value: &pb.MetricValue_Uint64Value{t}, + Value: &pb.MetricValue_Uint64Value{Uint64Value: t}, }) case map[string]uint64: for fieldValue, metricValue := range t { @@ -362,7 +380,7 @@ func EmitMetricUpdate() { m.Metrics = append(m.Metrics, &pb.MetricValue{ Name: k, FieldValues: []string{fieldValue}, - Value: &pb.MetricValue_Uint64Value{metricValue}, + Value: &pb.MetricValue_Uint64Value{Uint64Value: metricValue}, }) } } @@ -383,18 +401,7 @@ func EmitMetricUpdate() { } } - eventchannel.Emit(&m) -} - -// CreateSentryMetrics creates the sentry metrics during kernel initialization. -func CreateSentryMetrics() { - if WeirdnessMetric != nil { - return + if err := eventchannel.Emit(&m); err != nil { + log.Warningf("Unable to emit metrics: %s", err) } - - WeirdnessMetric = MustCreateNewUint64Metric("/weirdness", true /* sync */, "Increment for weird occurrences of problems such as time fallback, partial result and vsyscalls invoked in the sandbox", - Field{ - name: "weirdness_type", - allowedValues: []string{"time_fallback", "partial_result", "vsyscall_count"}, - }) } diff --git a/pkg/metric/metric_test.go b/pkg/metric/metric_test.go index c71dfd460..1b4a9e73a 100644 --- a/pkg/metric/metric_test.go +++ b/pkg/metric/metric_test.go @@ -48,6 +48,8 @@ func (s *sliceEmitter) Reset() { var emitter sliceEmitter func init() { + reset() + eventchannel.AddEmitter(&emitter) } @@ -77,7 +79,9 @@ func TestInitialize(t *testing.T) { t.Fatalf("NewUint64Metric got err %v want nil", err) } - Initialize() + if err := Initialize(); err != nil { + t.Fatalf("Initialize(): %s", err) + } if len(emitter) != 1 { t.Fatalf("Initialize emitted %d events want 1", len(emitter)) @@ -149,7 +153,9 @@ func TestDisable(t *testing.T) { t.Fatalf("NewUint64Metric got err %v want nil", err) } - Disable() + if err := Disable(); err != nil { + t.Fatalf("Disable(): %s", err) + } if len(emitter) != 1 { t.Fatalf("Initialize emitted %d events want 1", len(emitter)) @@ -178,7 +184,9 @@ func TestEmitMetricUpdate(t *testing.T) { t.Fatalf("NewUint64Metric got err %v want nil", err) } - Initialize() + if err := Initialize(); err != nil { + t.Fatalf("Initialize(): %s", err) + } // Don't care about the registration metrics. emitter.Reset() @@ -270,7 +278,9 @@ func TestEmitMetricUpdateWithFields(t *testing.T) { t.Fatalf("NewUint64Metric got err %v want nil", err) } - Initialize() + if err := Initialize(); err != nil { + t.Fatalf("Initialize(): %s", err) + } // Don't care about the registration metrics. emitter.Reset() diff --git a/pkg/refs/refcounter.go b/pkg/refs/refcounter.go index 4aecb8007..1bbcae045 100644 --- a/pkg/refs/refcounter.go +++ b/pkg/refs/refcounter.go @@ -261,8 +261,8 @@ func (l *LeakMode) Get() interface{} { } // String implements flag.Value. -func (l *LeakMode) String() string { - switch *l { +func (l LeakMode) String() string { + switch l { case UninitializedLeakChecking: return "uninitialized" case NoLeakChecking: @@ -272,7 +272,7 @@ func (l *LeakMode) String() string { case LeaksLogTraces: return "log-traces" } - panic(fmt.Sprintf("invalid ref leak mode %d", *l)) + panic(fmt.Sprintf("invalid ref leak mode %d", l)) } // leakMode stores the current mode for the reference leak checker. diff --git a/pkg/ring0/kernel_amd64.go b/pkg/ring0/kernel_amd64.go index 41dfd0bf9..f63af8b76 100644 --- a/pkg/ring0/kernel_amd64.go +++ b/pkg/ring0/kernel_amd64.go @@ -254,6 +254,8 @@ func (c *CPU) SwitchToUser(switchOpts SwitchOpts) (vector Vector) { return } +var sentryXCR0 = xgetbv(0) + // start is the CPU entrypoint. // // This is called from the Start asm stub (see entry_amd64.go); on return the @@ -265,24 +267,10 @@ func start(c *CPU) { WriteGS(kernelAddr(c.kernelEntry)) WriteFS(uintptr(c.registers.Fs_base)) - // Initialize floating point. - // - // Note that on skylake, the valid XCR0 mask reported seems to be 0xff. - // This breaks down as: - // - // bit0 - x87 - // bit1 - SSE - // bit2 - AVX - // bit3-4 - MPX - // bit5-7 - AVX512 - // - // For some reason, enabled MPX & AVX512 on platforms that report them - // seems to be cause a general protection fault. (Maybe there are some - // virtualization issues and these aren't exported to the guest cpuid.) - // This needs further investigation, but we can limit the floating - // point operations to x87, SSE & AVX for now. fninit() - xsetbv(0, validXCR0Mask&0x7) + // Need to sync XCR0 with the host, because xsave and xrstor can be + // called from different contexts. + xsetbv(0, sentryXCR0) // Set the syscall target. wrmsr(_MSR_LSTAR, kernelFunc(sysenter)) diff --git a/pkg/safecopy/BUILD b/pkg/safecopy/BUILD index b77c40279..db5787302 100644 --- a/pkg/safecopy/BUILD +++ b/pkg/safecopy/BUILD @@ -18,6 +18,7 @@ go_library( ], visibility = ["//:sandbox"], deps = [ + "//pkg/abi/linux", "//pkg/syserror", "@org_golang_x_sys//unix:go_default_library", ], diff --git a/pkg/safecopy/safecopy_unsafe.go b/pkg/safecopy/safecopy_unsafe.go index efbc2ddc1..2365b2c0d 100644 --- a/pkg/safecopy/safecopy_unsafe.go +++ b/pkg/safecopy/safecopy_unsafe.go @@ -20,6 +20,7 @@ import ( "unsafe" "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/abi/linux" ) // maxRegisterSize is the maximum register size used in memcpy and memclr. It @@ -342,12 +343,7 @@ func errorFromFaultSignal(addr uintptr, sig int32) error { // handler however, and if this is function is being used externally then the // same courtesy is expected. func ReplaceSignalHandler(sig unix.Signal, handler uintptr, previous *uintptr) error { - var sa struct { - handler uintptr - flags uint64 - restorer uintptr - mask uint64 - } + var sa linux.SigAction const maskLen = 8 // Get the existing signal handler information, and save the current @@ -358,14 +354,14 @@ func ReplaceSignalHandler(sig unix.Signal, handler uintptr, previous *uintptr) e } // Fail if there isn't a previous handler. - if sa.handler == 0 { + if sa.Handler == 0 { return fmt.Errorf("previous handler for signal %x isn't set", sig) } - *previous = sa.handler + *previous = uintptr(sa.Handler) // Install our own handler. - sa.handler = handler + sa.Handler = uint64(handler) if _, _, e := unix.RawSyscall6(unix.SYS_RT_SIGACTION, uintptr(sig), uintptr(unsafe.Pointer(&sa)), 0, maskLen, 0, 0); e != 0 { return e } diff --git a/pkg/seccomp/seccomp.go b/pkg/seccomp/seccomp.go index daea51c4d..8ffa1db37 100644 --- a/pkg/seccomp/seccomp.go +++ b/pkg/seccomp/seccomp.go @@ -36,14 +36,10 @@ const ( // Install generates BPF code based on the set of syscalls provided. It only // allows syscalls that conform to the specification. Syscalls that violate the -// specification will trigger RET_KILL_PROCESS, except for the cases below. -// -// RET_TRAP is used in violations, instead of RET_KILL_PROCESS, in the -// following cases: -// 1. Kernel doesn't support RET_KILL_PROCESS: RET_KILL_THREAD only kills the -// offending thread and often keeps the sentry hanging. -// 2. Debug: RET_TRAP generates a panic followed by a stack trace which is -// much easier to debug then RET_KILL_PROCESS which can't be caught. +// specification will trigger RET_KILL_PROCESS. If RET_KILL_PROCESS is not +// supported, violations will trigger RET_TRAP instead. RET_KILL_THREAD is not +// used because it only kills the offending thread and often keeps the sentry +// hanging. // // Be aware that RET_TRAP sends SIGSYS to the process and it may be ignored, // making it possible for the process to continue running after a violation. diff --git a/pkg/sentry/arch/BUILD b/pkg/sentry/arch/BUILD index c9c52530d..61dacd2fb 100644 --- a/pkg/sentry/arch/BUILD +++ b/pkg/sentry/arch/BUILD @@ -14,12 +14,8 @@ go_library( "arch_x86.go", "arch_x86_impl.go", "auxv.go", - "signal.go", - "signal_act.go", "signal_amd64.go", "signal_arm64.go", - "signal_info.go", - "signal_stack.go", "stack.go", "stack_unsafe.go", "syscalls_amd64.go", diff --git a/pkg/sentry/arch/arch.go b/pkg/sentry/arch/arch.go index 290863ee6..c9393b091 100644 --- a/pkg/sentry/arch/arch.go +++ b/pkg/sentry/arch/arch.go @@ -134,21 +134,13 @@ type Context interface { // RegisterMap returns a map of all registers. RegisterMap() (map[string]uintptr, error) - // NewSignalAct returns a new object that is equivalent to struct sigaction - // in the guest architecture. - NewSignalAct() NativeSignalAct - - // NewSignalStack returns a new object that is equivalent to stack_t in the - // guest architecture. - NewSignalStack() NativeSignalStack - // SignalSetup modifies the context in preparation for handling the // given signal. // // st is the stack where the signal handler frame should be // constructed. // - // act is the SignalAct that specifies how this signal is being + // act is the SigAction that specifies how this signal is being // handled. // // info is the SignalInfo of the signal being delivered. @@ -157,7 +149,7 @@ type Context interface { // stack is not going to be used). // // sigset is the signal mask before entering the signal handler. - SignalSetup(st *Stack, act *SignalAct, info *SignalInfo, alt *SignalStack, sigset linux.SignalSet) error + SignalSetup(st *Stack, act *linux.SigAction, info *linux.SignalInfo, alt *linux.SignalStack, sigset linux.SignalSet) error // SignalRestore restores context after returning from a signal // handler. @@ -167,7 +159,7 @@ type Context interface { // rt is true if SignalRestore is being entered from rt_sigreturn and // false if SignalRestore is being entered from sigreturn. // SignalRestore returns the thread's new signal mask. - SignalRestore(st *Stack, rt bool) (linux.SignalSet, SignalStack, error) + SignalRestore(st *Stack, rt bool) (linux.SignalSet, linux.SignalStack, error) // CPUIDEmulate emulates a CPUID instruction according to current register state. CPUIDEmulate(l log.Logger) diff --git a/pkg/sentry/arch/signal.go b/pkg/sentry/arch/signal.go deleted file mode 100644 index 67d7edf68..000000000 --- a/pkg/sentry/arch/signal.go +++ /dev/null @@ -1,276 +0,0 @@ -// Copyright 2020 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package arch - -import ( - "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/hostarch" -) - -// SignalAct represents the action that should be taken when a signal is -// delivered, and is equivalent to struct sigaction. -// -// +marshal -// +stateify savable -type SignalAct struct { - Handler uint64 - Flags uint64 - Restorer uint64 // Only used on amd64. - Mask linux.SignalSet -} - -// SerializeFrom implements NativeSignalAct.SerializeFrom. -func (s *SignalAct) SerializeFrom(other *SignalAct) { - *s = *other -} - -// DeserializeTo implements NativeSignalAct.DeserializeTo. -func (s *SignalAct) DeserializeTo(other *SignalAct) { - *other = *s -} - -// SignalStack represents information about a user stack, and is equivalent to -// stack_t. -// -// +marshal -// +stateify savable -type SignalStack struct { - Addr uint64 - Flags uint32 - _ uint32 - Size uint64 -} - -// SerializeFrom implements NativeSignalStack.SerializeFrom. -func (s *SignalStack) SerializeFrom(other *SignalStack) { - *s = *other -} - -// DeserializeTo implements NativeSignalStack.DeserializeTo. -func (s *SignalStack) DeserializeTo(other *SignalStack) { - *other = *s -} - -// SignalInfo represents information about a signal being delivered, and is -// equivalent to struct siginfo in linux kernel(linux/include/uapi/asm-generic/siginfo.h). -// -// +marshal -// +stateify savable -type SignalInfo struct { - Signo int32 // Signal number - Errno int32 // Errno value - Code int32 // Signal code - _ uint32 - - // struct siginfo::_sifields is a union. In SignalInfo, fields in the union - // are accessed through methods. - // - // For reference, here is the definition of _sifields: (_sigfault._trapno, - // which does not exist on x86, omitted for clarity) - // - // union { - // int _pad[SI_PAD_SIZE]; - // - // /* kill() */ - // struct { - // __kernel_pid_t _pid; /* sender's pid */ - // __ARCH_SI_UID_T _uid; /* sender's uid */ - // } _kill; - // - // /* POSIX.1b timers */ - // struct { - // __kernel_timer_t _tid; /* timer id */ - // int _overrun; /* overrun count */ - // char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)]; - // sigval_t _sigval; /* same as below */ - // int _sys_private; /* not to be passed to user */ - // } _timer; - // - // /* POSIX.1b signals */ - // struct { - // __kernel_pid_t _pid; /* sender's pid */ - // __ARCH_SI_UID_T _uid; /* sender's uid */ - // sigval_t _sigval; - // } _rt; - // - // /* SIGCHLD */ - // struct { - // __kernel_pid_t _pid; /* which child */ - // __ARCH_SI_UID_T _uid; /* sender's uid */ - // int _status; /* exit code */ - // __ARCH_SI_CLOCK_T _utime; - // __ARCH_SI_CLOCK_T _stime; - // } _sigchld; - // - // /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ - // struct { - // void *_addr; /* faulting insn/memory ref. */ - // short _addr_lsb; /* LSB of the reported address */ - // } _sigfault; - // - // /* SIGPOLL */ - // struct { - // __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */ - // int _fd; - // } _sigpoll; - // - // /* SIGSYS */ - // struct { - // void *_call_addr; /* calling user insn */ - // int _syscall; /* triggering system call number */ - // unsigned int _arch; /* AUDIT_ARCH_* of syscall */ - // } _sigsys; - // } _sifields; - // - // _sifields is padded so that the size of siginfo is SI_MAX_SIZE = 128 - // bytes. - Fields [128 - 16]byte -} - -// FixSignalCodeForUser fixes up si_code. -// -// The si_code we get from Linux may contain the kernel-specific code in the -// top 16 bits if it's positive (e.g., from ptrace). Linux's -// copy_siginfo_to_user does -// err |= __put_user((short)from->si_code, &to->si_code); -// to mask out those bits and we need to do the same. -func (s *SignalInfo) FixSignalCodeForUser() { - if s.Code > 0 { - s.Code &= 0x0000ffff - } -} - -// PID returns the si_pid field. -func (s *SignalInfo) PID() int32 { - return int32(hostarch.ByteOrder.Uint32(s.Fields[0:4])) -} - -// SetPID mutates the si_pid field. -func (s *SignalInfo) SetPID(val int32) { - hostarch.ByteOrder.PutUint32(s.Fields[0:4], uint32(val)) -} - -// UID returns the si_uid field. -func (s *SignalInfo) UID() int32 { - return int32(hostarch.ByteOrder.Uint32(s.Fields[4:8])) -} - -// SetUID mutates the si_uid field. -func (s *SignalInfo) SetUID(val int32) { - hostarch.ByteOrder.PutUint32(s.Fields[4:8], uint32(val)) -} - -// Sigval returns the sigval field, which is aliased to both si_int and si_ptr. -func (s *SignalInfo) Sigval() uint64 { - return hostarch.ByteOrder.Uint64(s.Fields[8:16]) -} - -// SetSigval mutates the sigval field. -func (s *SignalInfo) SetSigval(val uint64) { - hostarch.ByteOrder.PutUint64(s.Fields[8:16], val) -} - -// TimerID returns the si_timerid field. -func (s *SignalInfo) TimerID() linux.TimerID { - return linux.TimerID(hostarch.ByteOrder.Uint32(s.Fields[0:4])) -} - -// SetTimerID sets the si_timerid field. -func (s *SignalInfo) SetTimerID(val linux.TimerID) { - hostarch.ByteOrder.PutUint32(s.Fields[0:4], uint32(val)) -} - -// Overrun returns the si_overrun field. -func (s *SignalInfo) Overrun() int32 { - return int32(hostarch.ByteOrder.Uint32(s.Fields[4:8])) -} - -// SetOverrun sets the si_overrun field. -func (s *SignalInfo) SetOverrun(val int32) { - hostarch.ByteOrder.PutUint32(s.Fields[4:8], uint32(val)) -} - -// Addr returns the si_addr field. -func (s *SignalInfo) Addr() uint64 { - return hostarch.ByteOrder.Uint64(s.Fields[0:8]) -} - -// SetAddr sets the si_addr field. -func (s *SignalInfo) SetAddr(val uint64) { - hostarch.ByteOrder.PutUint64(s.Fields[0:8], val) -} - -// Status returns the si_status field. -func (s *SignalInfo) Status() int32 { - return int32(hostarch.ByteOrder.Uint32(s.Fields[8:12])) -} - -// SetStatus mutates the si_status field. -func (s *SignalInfo) SetStatus(val int32) { - hostarch.ByteOrder.PutUint32(s.Fields[8:12], uint32(val)) -} - -// CallAddr returns the si_call_addr field. -func (s *SignalInfo) CallAddr() uint64 { - return hostarch.ByteOrder.Uint64(s.Fields[0:8]) -} - -// SetCallAddr mutates the si_call_addr field. -func (s *SignalInfo) SetCallAddr(val uint64) { - hostarch.ByteOrder.PutUint64(s.Fields[0:8], val) -} - -// Syscall returns the si_syscall field. -func (s *SignalInfo) Syscall() int32 { - return int32(hostarch.ByteOrder.Uint32(s.Fields[8:12])) -} - -// SetSyscall mutates the si_syscall field. -func (s *SignalInfo) SetSyscall(val int32) { - hostarch.ByteOrder.PutUint32(s.Fields[8:12], uint32(val)) -} - -// Arch returns the si_arch field. -func (s *SignalInfo) Arch() uint32 { - return hostarch.ByteOrder.Uint32(s.Fields[12:16]) -} - -// SetArch mutates the si_arch field. -func (s *SignalInfo) SetArch(val uint32) { - hostarch.ByteOrder.PutUint32(s.Fields[12:16], val) -} - -// Band returns the si_band field. -func (s *SignalInfo) Band() int64 { - return int64(hostarch.ByteOrder.Uint64(s.Fields[0:8])) -} - -// SetBand mutates the si_band field. -func (s *SignalInfo) SetBand(val int64) { - // Note: this assumes the platform uses `long` as `__ARCH_SI_BAND_T`. - // On some platforms, which gVisor doesn't support, `__ARCH_SI_BAND_T` is - // `int`. See siginfo.h. - hostarch.ByteOrder.PutUint64(s.Fields[0:8], uint64(val)) -} - -// FD returns the si_fd field. -func (s *SignalInfo) FD() uint32 { - return hostarch.ByteOrder.Uint32(s.Fields[8:12]) -} - -// SetFD mutates the si_fd field. -func (s *SignalInfo) SetFD(val uint32) { - hostarch.ByteOrder.PutUint32(s.Fields[8:12], val) -} diff --git a/pkg/sentry/arch/signal_act.go b/pkg/sentry/arch/signal_act.go deleted file mode 100644 index d3e2324a8..000000000 --- a/pkg/sentry/arch/signal_act.go +++ /dev/null @@ -1,83 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package arch - -import "gvisor.dev/gvisor/pkg/marshal" - -// Special values for SignalAct.Handler. -const ( - // SignalActDefault is SIG_DFL and specifies that the default behavior for - // a signal should be taken. - SignalActDefault = 0 - - // SignalActIgnore is SIG_IGN and specifies that a signal should be - // ignored. - SignalActIgnore = 1 -) - -// Available signal flags. -const ( - SignalFlagNoCldStop = 0x00000001 - SignalFlagNoCldWait = 0x00000002 - SignalFlagSigInfo = 0x00000004 - SignalFlagRestorer = 0x04000000 - SignalFlagOnStack = 0x08000000 - SignalFlagRestart = 0x10000000 - SignalFlagInterrupt = 0x20000000 - SignalFlagNoDefer = 0x40000000 - SignalFlagResetHandler = 0x80000000 -) - -// IsSigInfo returns true iff this handle expects siginfo. -func (s SignalAct) IsSigInfo() bool { - return s.Flags&SignalFlagSigInfo != 0 -} - -// IsNoDefer returns true iff this SignalAct has the NoDefer flag set. -func (s SignalAct) IsNoDefer() bool { - return s.Flags&SignalFlagNoDefer != 0 -} - -// IsRestart returns true iff this SignalAct has the Restart flag set. -func (s SignalAct) IsRestart() bool { - return s.Flags&SignalFlagRestart != 0 -} - -// IsResetHandler returns true iff this SignalAct has the ResetHandler flag set. -func (s SignalAct) IsResetHandler() bool { - return s.Flags&SignalFlagResetHandler != 0 -} - -// IsOnStack returns true iff this SignalAct has the OnStack flag set. -func (s SignalAct) IsOnStack() bool { - return s.Flags&SignalFlagOnStack != 0 -} - -// HasRestorer returns true iff this SignalAct has the Restorer flag set. -func (s SignalAct) HasRestorer() bool { - return s.Flags&SignalFlagRestorer != 0 -} - -// NativeSignalAct is a type that is equivalent to struct sigaction in the -// guest architecture. -type NativeSignalAct interface { - marshal.Marshallable - - // SerializeFrom copies the data in the host SignalAct s into this object. - SerializeFrom(s *SignalAct) - - // DeserializeTo copies the data in this object into the host SignalAct s. - DeserializeTo(s *SignalAct) -} diff --git a/pkg/sentry/arch/signal_amd64.go b/pkg/sentry/arch/signal_amd64.go index 082ed92b1..58e28dbba 100644 --- a/pkg/sentry/arch/signal_amd64.go +++ b/pkg/sentry/arch/signal_amd64.go @@ -76,21 +76,11 @@ const ( type UContext64 struct { Flags uint64 Link uint64 - Stack SignalStack + Stack linux.SignalStack MContext SignalContext64 Sigset linux.SignalSet } -// NewSignalAct implements Context.NewSignalAct. -func (c *context64) NewSignalAct() NativeSignalAct { - return &SignalAct{} -} - -// NewSignalStack implements Context.NewSignalStack. -func (c *context64) NewSignalStack() NativeSignalStack { - return &SignalStack{} -} - // From Linux 'arch/x86/include/uapi/asm/sigcontext.h' the following is the // size of the magic cookie at the end of the xsave frame. // @@ -110,7 +100,7 @@ func (c *context64) fpuFrameSize() (size int, useXsave bool) { // SignalSetup implements Context.SignalSetup. (Compare to Linux's // arch/x86/kernel/signal.c:__setup_rt_frame().) -func (c *context64) SignalSetup(st *Stack, act *SignalAct, info *SignalInfo, alt *SignalStack, sigset linux.SignalSet) error { +func (c *context64) SignalSetup(st *Stack, act *linux.SigAction, info *linux.SignalInfo, alt *linux.SignalStack, sigset linux.SignalSet) error { sp := st.Bottom // "The 128-byte area beyond the location pointed to by %rsp is considered @@ -187,7 +177,7 @@ func (c *context64) SignalSetup(st *Stack, act *SignalAct, info *SignalInfo, alt // Prior to proceeding, figure out if the frame will exhaust the range // for the signal stack. This is not allowed, and should immediately // force signal delivery (reverting to the default handler). - if act.IsOnStack() && alt.IsEnabled() && !alt.Contains(frameBottom) { + if act.Flags&linux.SA_ONSTACK != 0 && alt.IsEnabled() && !alt.Contains(frameBottom) { return unix.EFAULT } @@ -203,7 +193,7 @@ func (c *context64) SignalSetup(st *Stack, act *SignalAct, info *SignalInfo, alt return err } ucAddr := st.Bottom - if act.HasRestorer() { + if act.Flags&linux.SA_RESTORER != 0 { // Push the restorer return address. // Note that this doesn't need to be popped. if _, err := primitive.CopyUint64Out(st, StackBottomMagic, act.Restorer); err != nil { @@ -237,15 +227,15 @@ func (c *context64) SignalSetup(st *Stack, act *SignalAct, info *SignalInfo, alt // SignalRestore implements Context.SignalRestore. (Compare to Linux's // arch/x86/kernel/signal.c:sys_rt_sigreturn().) -func (c *context64) SignalRestore(st *Stack, rt bool) (linux.SignalSet, SignalStack, error) { +func (c *context64) SignalRestore(st *Stack, rt bool) (linux.SignalSet, linux.SignalStack, error) { // Copy out the stack frame. var uc UContext64 if _, err := uc.CopyIn(st, StackBottomMagic); err != nil { - return 0, SignalStack{}, err + return 0, linux.SignalStack{}, err } - var info SignalInfo + var info linux.SignalInfo if _, err := info.CopyIn(st, StackBottomMagic); err != nil { - return 0, SignalStack{}, err + return 0, linux.SignalStack{}, err } // Restore registers. diff --git a/pkg/sentry/arch/signal_arm64.go b/pkg/sentry/arch/signal_arm64.go index da71fb873..80df90076 100644 --- a/pkg/sentry/arch/signal_arm64.go +++ b/pkg/sentry/arch/signal_arm64.go @@ -61,7 +61,7 @@ type FpsimdContext struct { type UContext64 struct { Flags uint64 Link uint64 - Stack SignalStack + Stack linux.SignalStack Sigset linux.SignalSet // glibc uses a 1024-bit sigset_t _pad [120]byte // (1024 - 64) / 8 = 120 @@ -71,18 +71,8 @@ type UContext64 struct { MContext SignalContext64 } -// NewSignalAct implements Context.NewSignalAct. -func (c *context64) NewSignalAct() NativeSignalAct { - return &SignalAct{} -} - -// NewSignalStack implements Context.NewSignalStack. -func (c *context64) NewSignalStack() NativeSignalStack { - return &SignalStack{} -} - // SignalSetup implements Context.SignalSetup. -func (c *context64) SignalSetup(st *Stack, act *SignalAct, info *SignalInfo, alt *SignalStack, sigset linux.SignalSet) error { +func (c *context64) SignalSetup(st *Stack, act *linux.SigAction, info *linux.SignalInfo, alt *linux.SignalStack, sigset linux.SignalSet) error { sp := st.Bottom // Construct the UContext64 now since we need its size. @@ -114,7 +104,7 @@ func (c *context64) SignalSetup(st *Stack, act *SignalAct, info *SignalInfo, alt // Prior to proceeding, figure out if the frame will exhaust the range // for the signal stack. This is not allowed, and should immediately // force signal delivery (reverting to the default handler). - if act.IsOnStack() && alt.IsEnabled() && !alt.Contains(frameBottom) { + if act.Flags&linux.SA_ONSTACK != 0 && alt.IsEnabled() && !alt.Contains(frameBottom) { return unix.EFAULT } @@ -137,7 +127,7 @@ func (c *context64) SignalSetup(st *Stack, act *SignalAct, info *SignalInfo, alt c.Regs.Regs[0] = uint64(info.Signo) c.Regs.Regs[1] = uint64(infoAddr) c.Regs.Regs[2] = uint64(ucAddr) - c.Regs.Regs[30] = uint64(act.Restorer) + c.Regs.Regs[30] = act.Restorer // Save the thread's floating point state. c.sigFPState = append(c.sigFPState, c.fpState) @@ -147,15 +137,15 @@ func (c *context64) SignalSetup(st *Stack, act *SignalAct, info *SignalInfo, alt } // SignalRestore implements Context.SignalRestore. -func (c *context64) SignalRestore(st *Stack, rt bool) (linux.SignalSet, SignalStack, error) { +func (c *context64) SignalRestore(st *Stack, rt bool) (linux.SignalSet, linux.SignalStack, error) { // Copy out the stack frame. var uc UContext64 if _, err := uc.CopyIn(st, StackBottomMagic); err != nil { - return 0, SignalStack{}, err + return 0, linux.SignalStack{}, err } - var info SignalInfo + var info linux.SignalInfo if _, err := info.CopyIn(st, StackBottomMagic); err != nil { - return 0, SignalStack{}, err + return 0, linux.SignalStack{}, err } // Restore registers. diff --git a/pkg/sentry/arch/signal_info.go b/pkg/sentry/arch/signal_info.go deleted file mode 100644 index f93ee8b46..000000000 --- a/pkg/sentry/arch/signal_info.go +++ /dev/null @@ -1,66 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package arch - -// Possible values for SignalInfo.Code. These values originate from the Linux -// kernel's include/uapi/asm-generic/siginfo.h. -const ( - // SignalInfoUser (properly SI_USER) indicates that a signal was sent from - // a kill() or raise() syscall. - SignalInfoUser = 0 - - // SignalInfoKernel (properly SI_KERNEL) indicates that the signal was sent - // by the kernel. - SignalInfoKernel = 0x80 - - // SignalInfoTimer (properly SI_TIMER) indicates that the signal was sent - // by an expired timer. - SignalInfoTimer = -2 - - // SignalInfoTkill (properly SI_TKILL) indicates that the signal was sent - // from a tkill() or tgkill() syscall. - SignalInfoTkill = -6 - - // CLD_* codes are only meaningful for SIGCHLD. - - // CLD_EXITED indicates that a task exited. - CLD_EXITED = 1 - - // CLD_KILLED indicates that a task was killed by a signal. - CLD_KILLED = 2 - - // CLD_DUMPED indicates that a task was killed by a signal and then dumped - // core. - CLD_DUMPED = 3 - - // CLD_TRAPPED indicates that a task was stopped by ptrace. - CLD_TRAPPED = 4 - - // CLD_STOPPED indicates that a thread group completed a group stop. - CLD_STOPPED = 5 - - // CLD_CONTINUED indicates that a group-stopped thread group was continued. - CLD_CONTINUED = 6 - - // SYS_* codes are only meaningful for SIGSYS. - - // SYS_SECCOMP indicates that a signal originates from seccomp. - SYS_SECCOMP = 1 - - // TRAP_* codes are only meaningful for SIGTRAP. - - // TRAP_BRKPT indicates a breakpoint trap. - TRAP_BRKPT = 1 -) diff --git a/pkg/sentry/arch/signal_stack.go b/pkg/sentry/arch/signal_stack.go deleted file mode 100644 index c732c7503..000000000 --- a/pkg/sentry/arch/signal_stack.go +++ /dev/null @@ -1,68 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// +build 386 amd64 arm64 - -package arch - -import ( - "gvisor.dev/gvisor/pkg/hostarch" - "gvisor.dev/gvisor/pkg/marshal" -) - -const ( - // SignalStackFlagOnStack is possible set on return from getaltstack, - // in order to indicate that the thread is currently on the alt stack. - SignalStackFlagOnStack = 1 - - // SignalStackFlagDisable is a flag to indicate the stack is disabled. - SignalStackFlagDisable = 2 -) - -// IsEnabled returns true iff this signal stack is marked as enabled. -func (s SignalStack) IsEnabled() bool { - return s.Flags&SignalStackFlagDisable == 0 -} - -// Top returns the stack's top address. -func (s SignalStack) Top() hostarch.Addr { - return hostarch.Addr(s.Addr + s.Size) -} - -// SetOnStack marks this signal stack as in use. -// -// Note that there is no corresponding ClearOnStack, and that this should only -// be called on copies that are serialized to userspace. -func (s *SignalStack) SetOnStack() { - s.Flags |= SignalStackFlagOnStack -} - -// Contains checks if the stack pointer is within this stack. -func (s *SignalStack) Contains(sp hostarch.Addr) bool { - return hostarch.Addr(s.Addr) < sp && sp <= hostarch.Addr(s.Addr+s.Size) -} - -// NativeSignalStack is a type that is equivalent to stack_t in the guest -// architecture. -type NativeSignalStack interface { - marshal.Marshallable - - // SerializeFrom copies the data in the host SignalStack s into this - // object. - SerializeFrom(s *SignalStack) - - // DeserializeTo copies the data in this object into the host SignalStack - // s. - DeserializeTo(s *SignalStack) -} diff --git a/pkg/sentry/arch/stack.go b/pkg/sentry/arch/stack.go index 65a794c7c..85e3515af 100644 --- a/pkg/sentry/arch/stack.go +++ b/pkg/sentry/arch/stack.go @@ -45,7 +45,7 @@ type Stack struct { } // scratchBufLen is the default length of Stack.scratchBuf. The -// largest structs the stack regularly serializes are arch.SignalInfo +// largest structs the stack regularly serializes are linux.SignalInfo // and arch.UContext64. We'll set the default size as the larger of // the two, arch.UContext64. var scratchBufLen = (*UContext64)(nil).SizeBytes() diff --git a/pkg/sentry/control/proc.go b/pkg/sentry/control/proc.go index 367849e75..221e98a01 100644 --- a/pkg/sentry/control/proc.go +++ b/pkg/sentry/control/proc.go @@ -99,6 +99,9 @@ type ExecArgs struct { // PIDNamespace is the pid namespace for the process being executed. PIDNamespace *kernel.PIDNamespace + + // Limits is the limit set for the process being executed. + Limits *limits.LimitSet } // String prints the arguments as a string. @@ -151,6 +154,10 @@ func (proc *Proc) execAsync(args *ExecArgs) (*kernel.ThreadGroup, kernel.ThreadI if pidns == nil { pidns = proc.Kernel.RootPIDNamespace() } + limitSet := args.Limits + if limitSet == nil { + limitSet = limits.NewLimitSet() + } initArgs := kernel.CreateProcessArgs{ Filename: args.Filename, Argv: args.Argv, @@ -161,7 +168,7 @@ func (proc *Proc) execAsync(args *ExecArgs) (*kernel.ThreadGroup, kernel.ThreadI Credentials: creds, FDTable: fdTable, Umask: 0022, - Limits: limits.NewLimitSet(), + Limits: limitSet, MaxSymlinkTraversals: linux.MaxSymlinkTraversals, UTSNamespace: proc.Kernel.RootUTSNamespace(), IPCNamespace: proc.Kernel.RootIPCNamespace(), diff --git a/pkg/sentry/fs/attr.go b/pkg/sentry/fs/attr.go index b90f7c1be..4c99944e7 100644 --- a/pkg/sentry/fs/attr.go +++ b/pkg/sentry/fs/attr.go @@ -478,6 +478,20 @@ func (f FilePermissions) AnyRead() bool { return f.User.Read || f.Group.Read || f.Other.Read } +// HasSetUIDOrGID returns true if either the setuid or setgid bit is set. +func (f FilePermissions) HasSetUIDOrGID() bool { + return f.SetUID || f.SetGID +} + +// DropSetUIDAndMaybeGID turns off setuid, and turns off setgid if f allows +// group execution. +func (f *FilePermissions) DropSetUIDAndMaybeGID() { + f.SetUID = false + if f.Group.Execute { + f.SetGID = false + } +} + // FileOwner represents ownership of a file. // // +stateify savable diff --git a/pkg/sentry/fs/dev/dev.go b/pkg/sentry/fs/dev/dev.go index e84ba7a5d..c62effd52 100644 --- a/pkg/sentry/fs/dev/dev.go +++ b/pkg/sentry/fs/dev/dev.go @@ -16,6 +16,7 @@ package dev import ( + "fmt" "math" "gvisor.dev/gvisor/pkg/context" @@ -90,6 +91,11 @@ func newSymlink(ctx context.Context, target string, msrc *fs.MountSource) *fs.In // New returns the root node of a device filesystem. func New(ctx context.Context, msrc *fs.MountSource) *fs.Inode { + shm, err := tmpfs.NewDir(ctx, nil, fs.RootOwner, fs.FilePermsFromMode(0777), msrc, nil /* parent */) + if err != nil { + panic(fmt.Sprintf("tmpfs.NewDir failed: %v", err)) + } + contents := map[string]*fs.Inode{ "fd": newSymlink(ctx, "/proc/self/fd", msrc), "stdin": newSymlink(ctx, "/proc/self/fd/0", msrc), @@ -108,7 +114,7 @@ func New(ctx context.Context, msrc *fs.MountSource) *fs.Inode { "random": newMemDevice(ctx, newRandomDevice(ctx, fs.RootOwner, 0444), msrc, randomDevMinor), "urandom": newMemDevice(ctx, newRandomDevice(ctx, fs.RootOwner, 0444), msrc, urandomDevMinor), - "shm": tmpfs.NewDir(ctx, nil, fs.RootOwner, fs.FilePermsFromMode(0777), msrc), + "shm": shm, // A devpts is typically mounted at /dev/pts to provide // pseudoterminal support. Place an empty directory there for diff --git a/pkg/sentry/fs/fsutil/host_mappable.go b/pkg/sentry/fs/fsutil/host_mappable.go index e1e38b498..8ac3738e9 100644 --- a/pkg/sentry/fs/fsutil/host_mappable.go +++ b/pkg/sentry/fs/fsutil/host_mappable.go @@ -155,12 +155,20 @@ func (h *HostMappable) DecRef(fr memmap.FileRange) { // T2: Appends to file causing it to grow // T2: Writes to mapped pages and COW happens // T1: Continues and wronly invalidates the page mapped in step above. -func (h *HostMappable) Truncate(ctx context.Context, newSize int64) error { +func (h *HostMappable) Truncate(ctx context.Context, newSize int64, uattr fs.UnstableAttr) error { h.truncateMu.Lock() defer h.truncateMu.Unlock() mask := fs.AttrMask{Size: true} attr := fs.UnstableAttr{Size: newSize} + + // Truncating a file clears privilege bits. + if uattr.Perms.HasSetUIDOrGID() { + mask.Perms = true + attr.Perms = uattr.Perms + attr.Perms.DropSetUIDAndMaybeGID() + } + if err := h.backingFile.SetMaskedAttributes(ctx, mask, attr, false); err != nil { return err } @@ -193,10 +201,17 @@ func (h *HostMappable) Allocate(ctx context.Context, offset int64, length int64) } // Write writes to the file backing this mappable. -func (h *HostMappable) Write(ctx context.Context, src usermem.IOSequence, offset int64) (int64, error) { +func (h *HostMappable) Write(ctx context.Context, src usermem.IOSequence, offset int64, uattr fs.UnstableAttr) (int64, error) { h.truncateMu.RLock() + defer h.truncateMu.RUnlock() n, err := src.CopyInTo(ctx, &writer{ctx: ctx, hostMappable: h, off: offset}) - h.truncateMu.RUnlock() + if n > 0 && uattr.Perms.HasSetUIDOrGID() { + mask := fs.AttrMask{Perms: true} + uattr.Perms.DropSetUIDAndMaybeGID() + if err := h.backingFile.SetMaskedAttributes(ctx, mask, uattr, false); err != nil { + return n, err + } + } return n, err } diff --git a/pkg/sentry/fs/fsutil/inode_cached.go b/pkg/sentry/fs/fsutil/inode_cached.go index 7856b354b..855029b84 100644 --- a/pkg/sentry/fs/fsutil/inode_cached.go +++ b/pkg/sentry/fs/fsutil/inode_cached.go @@ -310,6 +310,12 @@ func (c *CachingInodeOperations) Truncate(ctx context.Context, inode *fs.Inode, now := ktime.NowFromContext(ctx) masked := fs.AttrMask{Size: true} attr := fs.UnstableAttr{Size: size} + if c.attr.Perms.HasSetUIDOrGID() { + masked.Perms = true + attr.Perms = c.attr.Perms + attr.Perms.DropSetUIDAndMaybeGID() + c.attr.Perms = attr.Perms + } if err := c.backingFile.SetMaskedAttributes(ctx, masked, attr, false); err != nil { c.dataMu.Unlock() return err @@ -685,13 +691,14 @@ func (rw *inodeReadWriter) ReadToBlocks(dsts safemem.BlockSeq) (uint64, error) { return done, nil } -// maybeGrowFile grows the file's size if data has been written past the old -// size. +// maybeUpdateAttrs updates the file's attributes after a write. It updates +// size if data has been written past the old size, and setuid/setgid if any +// bytes were written. // // Preconditions: // * rw.c.attrMu must be locked. // * rw.c.dataMu must be locked. -func (rw *inodeReadWriter) maybeGrowFile() { +func (rw *inodeReadWriter) maybeUpdateAttrs(nwritten uint64) { // If the write ends beyond the file's previous size, it causes the // file to grow. if rw.offset > rw.c.attr.Size { @@ -705,6 +712,12 @@ func (rw *inodeReadWriter) maybeGrowFile() { rw.c.attr.Usage = rw.offset rw.c.dirtyAttr.Usage = true } + + // If bytes were written, ensure setuid and setgid are cleared. + if nwritten > 0 && rw.c.attr.Perms.HasSetUIDOrGID() { + rw.c.dirtyAttr.Perms = true + rw.c.attr.Perms.DropSetUIDAndMaybeGID() + } } // WriteFromBlocks implements safemem.Writer.WriteFromBlocks. @@ -732,7 +745,7 @@ func (rw *inodeReadWriter) WriteFromBlocks(srcs safemem.BlockSeq) (uint64, error segMR := seg.Range().Intersect(mr) ims, err := mf.MapInternal(seg.FileRangeOf(segMR), hostarch.Write) if err != nil { - rw.maybeGrowFile() + rw.maybeUpdateAttrs(done) rw.c.dataMu.Unlock() return done, err } @@ -744,7 +757,7 @@ func (rw *inodeReadWriter) WriteFromBlocks(srcs safemem.BlockSeq) (uint64, error srcs = srcs.DropFirst64(n) rw.c.dirty.MarkDirty(segMR) if err != nil { - rw.maybeGrowFile() + rw.maybeUpdateAttrs(done) rw.c.dataMu.Unlock() return done, err } @@ -765,7 +778,7 @@ func (rw *inodeReadWriter) WriteFromBlocks(srcs safemem.BlockSeq) (uint64, error srcs = srcs.DropFirst64(n) // Partial writes are fine. But we must stop writing. if n != src.NumBytes() || err != nil { - rw.maybeGrowFile() + rw.maybeUpdateAttrs(done) rw.c.dataMu.Unlock() return done, err } @@ -774,7 +787,7 @@ func (rw *inodeReadWriter) WriteFromBlocks(srcs safemem.BlockSeq) (uint64, error seg, gap = gap.NextSegment(), FileRangeGapIterator{} } } - rw.maybeGrowFile() + rw.maybeUpdateAttrs(done) rw.c.dataMu.Unlock() return done, nil } diff --git a/pkg/sentry/fs/gofer/BUILD b/pkg/sentry/fs/gofer/BUILD index c4a069832..94cb05246 100644 --- a/pkg/sentry/fs/gofer/BUILD +++ b/pkg/sentry/fs/gofer/BUILD @@ -29,6 +29,7 @@ go_library( "//pkg/fd", "//pkg/hostarch", "//pkg/log", + "//pkg/metric", "//pkg/p9", "//pkg/refs", "//pkg/safemem", diff --git a/pkg/sentry/fs/gofer/cache_policy.go b/pkg/sentry/fs/gofer/cache_policy.go index 07a564e92..f8b7a60fc 100644 --- a/pkg/sentry/fs/gofer/cache_policy.go +++ b/pkg/sentry/fs/gofer/cache_policy.go @@ -139,7 +139,7 @@ func (cp cachePolicy) revalidate(ctx context.Context, name string, parent, child // Walk from parent to child again. // - // TODO(b/112031682): If we have a directory FD in the parent + // NOTE(b/112031682): If we have a directory FD in the parent // inodeOperations, then we can use fstatat(2) to get the inode // attributes instead of making this RPC. qids, f, mask, attr, err := parentIops.fileState.file.walkGetAttr(ctx, []string{name}) diff --git a/pkg/sentry/fs/gofer/file.go b/pkg/sentry/fs/gofer/file.go index 8f5a87120..73d80d9b5 100644 --- a/pkg/sentry/fs/gofer/file.go +++ b/pkg/sentry/fs/gofer/file.go @@ -21,6 +21,7 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/metric" "gvisor.dev/gvisor/pkg/p9" "gvisor.dev/gvisor/pkg/sentry/device" "gvisor.dev/gvisor/pkg/sentry/fs" @@ -91,7 +92,7 @@ func NewFile(ctx context.Context, dirent *fs.Dirent, name string, flags fs.FileF } if flags.Write { if err := dirent.Inode.CheckPermission(ctx, fs.PermMask{Execute: true}); err == nil { - fsmetric.GoferOpensWX.Increment() + metric.SuspiciousOperationsMetric.Increment("opened_write_execute_file") log.Warningf("Opened a writable executable: %q", name) } } @@ -236,10 +237,20 @@ func (f *fileOperations) Write(ctx context.Context, file *fs.File, src usermem.I // and availability of a host-mappable FD. if f.inodeOperations.session().cachePolicy.useCachingInodeOps(file.Dirent.Inode) { n, err = f.inodeOperations.cachingInodeOps.Write(ctx, src, offset) - } else if f.inodeOperations.fileState.hostMappable != nil { - n, err = f.inodeOperations.fileState.hostMappable.Write(ctx, src, offset) } else { - n, err = src.CopyInTo(ctx, f.handles.readWriterAt(ctx, offset)) + uattr, e := f.UnstableAttr(ctx, file) + if e != nil { + return 0, e + } + if f.inodeOperations.fileState.hostMappable != nil { + n, err = f.inodeOperations.fileState.hostMappable.Write(ctx, src, offset, uattr) + } else { + n, err = src.CopyInTo(ctx, f.handles.readWriterAt(ctx, offset)) + if n > 0 && uattr.Perms.HasSetUIDOrGID() { + uattr.Perms.DropSetUIDAndMaybeGID() + f.inodeOperations.SetPermissions(ctx, file.Dirent.Inode, uattr.Perms) + } + } } if n == 0 { diff --git a/pkg/sentry/fs/gofer/inode.go b/pkg/sentry/fs/gofer/inode.go index b97635ec4..da3178527 100644 --- a/pkg/sentry/fs/gofer/inode.go +++ b/pkg/sentry/fs/gofer/inode.go @@ -600,11 +600,25 @@ func (i *inodeOperations) Truncate(ctx context.Context, inode *fs.Inode, length if i.session().cachePolicy.useCachingInodeOps(inode) { return i.cachingInodeOps.Truncate(ctx, inode, length) } + + uattr, err := i.fileState.unstableAttr(ctx) + if err != nil { + return err + } + if i.session().cachePolicy == cacheRemoteRevalidating { - return i.fileState.hostMappable.Truncate(ctx, length) + return i.fileState.hostMappable.Truncate(ctx, length, uattr) + } + + mask := p9.SetAttrMask{Size: true} + attr := p9.SetAttr{Size: uint64(length)} + if uattr.Perms.HasSetUIDOrGID() { + mask.Permissions = true + uattr.Perms.DropSetUIDAndMaybeGID() + attr.Permissions = p9.FileMode(uattr.Perms.LinuxMode()) } - return i.fileState.file.setAttr(ctx, p9.SetAttrMask{Size: true}, p9.SetAttr{Size: uint64(length)}) + return i.fileState.file.setAttr(ctx, mask, attr) } // GetXattr implements fs.InodeOperations.GetXattr. diff --git a/pkg/sentry/fs/gofer/path.go b/pkg/sentry/fs/gofer/path.go index 6b3627813..940838a44 100644 --- a/pkg/sentry/fs/gofer/path.go +++ b/pkg/sentry/fs/gofer/path.go @@ -130,7 +130,16 @@ func (i *inodeOperations) Create(ctx context.Context, dir *fs.Inode, name string panic(fmt.Sprintf("Create called with unknown or unset open flags: %v", flags)) } + // If the parent directory has setgid enabled, change the new file's owner. owner := fs.FileOwnerFromContext(ctx) + parentUattr, err := dir.UnstableAttr(ctx) + if err != nil { + return nil, err + } + if parentUattr.Perms.SetGID { + owner.GID = parentUattr.Owner.GID + } + hostFile, err := newFile.create(ctx, name, openFlags, p9.FileMode(perm.LinuxMode()), p9.UID(owner.UID), p9.GID(owner.GID)) if err != nil { // Could not create the file. @@ -225,7 +234,18 @@ func (i *inodeOperations) CreateDirectory(ctx context.Context, dir *fs.Inode, s return syserror.ENAMETOOLONG } + // If the parent directory has setgid enabled, change the new directory's + // owner and enable setgid. owner := fs.FileOwnerFromContext(ctx) + parentUattr, err := dir.UnstableAttr(ctx) + if err != nil { + return err + } + if parentUattr.Perms.SetGID { + owner.GID = parentUattr.Owner.GID + perm.SetGID = true + } + if _, err := i.fileState.file.mkdir(ctx, s, p9.FileMode(perm.LinuxMode()), p9.UID(owner.UID), p9.GID(owner.GID)); err != nil { return err } diff --git a/pkg/sentry/fs/proc/sys.go b/pkg/sentry/fs/proc/sys.go index b998fb75d..085aa6d61 100644 --- a/pkg/sentry/fs/proc/sys.go +++ b/pkg/sentry/fs/proc/sys.go @@ -77,6 +77,27 @@ func (*overcommitMemory) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandl }, 0 } +// +stateify savable +type maxMapCount struct{} + +// NeedsUpdate implements seqfile.SeqSource. +func (*maxMapCount) NeedsUpdate(int64) bool { + return true +} + +// ReadSeqFileData implements seqfile.SeqSource. +func (*maxMapCount) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) ([]seqfile.SeqData, int64) { + if h != nil { + return nil, 0 + } + return []seqfile.SeqData{ + { + Buf: []byte("2147483647\n"), + Handle: (*maxMapCount)(nil), + }, + }, 0 +} + func (p *proc) newKernelDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { h := hostname{ SimpleFileInode: *fsutil.NewSimpleFileInode(ctx, fs.RootOwner, fs.FilePermsFromMode(0444), linux.PROC_SUPER_MAGIC), @@ -96,6 +117,7 @@ func (p *proc) newKernelDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode func (p *proc) newVMDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode { children := map[string]*fs.Inode{ + "max_map_count": seqfile.NewSeqFileInode(ctx, &maxMapCount{}, msrc), "mmap_min_addr": seqfile.NewSeqFileInode(ctx, &mmapMinAddrData{p.k}, msrc), "overcommit_memory": seqfile.NewSeqFileInode(ctx, &overcommitMemory{}, msrc), } diff --git a/pkg/sentry/fs/proc/sys_net.go b/pkg/sentry/fs/proc/sys_net.go index 1d09afdd7..4893af56b 100644 --- a/pkg/sentry/fs/proc/sys_net.go +++ b/pkg/sentry/fs/proc/sys_net.go @@ -403,7 +403,7 @@ type ipForwarding struct { // enabled stores the IPv4 forwarding state on save. // We must save/restore this here, since a netstack instance // is created on restore. - enabled *bool + enabled bool } func newIPForwardingInode(ctx context.Context, msrc *fs.MountSource, s inet.Stack) *fs.Inode { @@ -461,13 +461,8 @@ func (f *ipForwardingFile) Read(ctx context.Context, _ *fs.File, dst usermem.IOS return 0, io.EOF } - if f.ipf.enabled == nil { - enabled := f.stack.Forwarding(ipv4.ProtocolNumber) - f.ipf.enabled = &enabled - } - val := "0\n" - if *f.ipf.enabled { + if f.ipf.enabled { // Technically, this is not quite compatible with Linux. Linux // stores these as an integer, so if you write "2" into // ip_forward, you should get 2 back. @@ -494,11 +489,8 @@ func (f *ipForwardingFile) Write(ctx context.Context, _ *fs.File, src usermem.IO if err != nil { return n, err } - if f.ipf.enabled == nil { - f.ipf.enabled = new(bool) - } - *f.ipf.enabled = v != 0 - return n, f.stack.SetForwarding(ipv4.ProtocolNumber, *f.ipf.enabled) + f.ipf.enabled = v != 0 + return n, f.stack.SetForwarding(ipv4.ProtocolNumber, f.ipf.enabled) } // portRangeInode implements fs.InodeOperations. It provides and allows diff --git a/pkg/sentry/fs/proc/sys_net_state.go b/pkg/sentry/fs/proc/sys_net_state.go index 4cb4741af..51d2be647 100644 --- a/pkg/sentry/fs/proc/sys_net_state.go +++ b/pkg/sentry/fs/proc/sys_net_state.go @@ -47,9 +47,7 @@ func (s *tcpSack) afterLoad() { // afterLoad is invoked by stateify. func (ipf *ipForwarding) afterLoad() { - if ipf.enabled != nil { - if err := ipf.stack.SetForwarding(ipv4.ProtocolNumber, *ipf.enabled); err != nil { - panic(fmt.Sprintf("failed to set IPv4 forwarding [%v]: %v", *ipf.enabled, err)) - } + if err := ipf.stack.SetForwarding(ipv4.ProtocolNumber, ipf.enabled); err != nil { + panic(fmt.Sprintf("ipf.stack.SetForwarding(%d, %t): %s", ipv4.ProtocolNumber, ipf.enabled, err)) } } diff --git a/pkg/sentry/fs/tmpfs/fs.go b/pkg/sentry/fs/tmpfs/fs.go index bc117ca6a..b48d475ed 100644 --- a/pkg/sentry/fs/tmpfs/fs.go +++ b/pkg/sentry/fs/tmpfs/fs.go @@ -151,5 +151,5 @@ func (f *Filesystem) Mount(ctx context.Context, device string, flags fs.MountSou } // Construct the tmpfs root. - return NewDir(ctx, nil, owner, perms, msrc), nil + return NewDir(ctx, nil, owner, perms, msrc, nil /* parent */) } diff --git a/pkg/sentry/fs/tmpfs/inode_file.go b/pkg/sentry/fs/tmpfs/inode_file.go index f4de8c968..7faa822f0 100644 --- a/pkg/sentry/fs/tmpfs/inode_file.go +++ b/pkg/sentry/fs/tmpfs/inode_file.go @@ -226,6 +226,12 @@ func (f *fileInodeOperations) Truncate(ctx context.Context, _ *fs.Inode, size in now := ktime.NowFromContext(ctx) f.attr.ModificationTime = now f.attr.StatusChangeTime = now + + // Truncating clears privilege bits. + f.attr.Perms.SetUID = false + if f.attr.Perms.Group.Execute { + f.attr.Perms.SetGID = false + } } f.dataMu.Unlock() @@ -363,7 +369,14 @@ func (f *fileInodeOperations) write(ctx context.Context, src usermem.IOSequence, now := ktime.NowFromContext(ctx) f.attr.ModificationTime = now f.attr.StatusChangeTime = now - return src.CopyInTo(ctx, &fileReadWriter{f, offset}) + nwritten, err := src.CopyInTo(ctx, &fileReadWriter{f, offset}) + + // Writing clears privilege bits. + if nwritten > 0 { + f.attr.Perms.DropSetUIDAndMaybeGID() + } + + return nwritten, err } type fileReadWriter struct { diff --git a/pkg/sentry/fs/tmpfs/tmpfs.go b/pkg/sentry/fs/tmpfs/tmpfs.go index 577052888..6aa8ff331 100644 --- a/pkg/sentry/fs/tmpfs/tmpfs.go +++ b/pkg/sentry/fs/tmpfs/tmpfs.go @@ -87,7 +87,20 @@ type Dir struct { var _ fs.InodeOperations = (*Dir)(nil) // NewDir returns a new directory. -func NewDir(ctx context.Context, contents map[string]*fs.Inode, owner fs.FileOwner, perms fs.FilePermissions, msrc *fs.MountSource) *fs.Inode { +func NewDir(ctx context.Context, contents map[string]*fs.Inode, owner fs.FileOwner, perms fs.FilePermissions, msrc *fs.MountSource, parent *fs.Inode) (*fs.Inode, error) { + // If the parent has setgid enabled, the new directory enables it and changes + // its GID. + if parent != nil { + parentUattr, err := parent.UnstableAttr(ctx) + if err != nil { + return nil, err + } + if parentUattr.Perms.SetGID { + owner.GID = parentUattr.Owner.GID + perms.SetGID = true + } + } + d := &Dir{ ramfsDir: ramfs.NewDir(ctx, contents, owner, perms), kernel: kernel.KernelFromContext(ctx), @@ -101,7 +114,7 @@ func NewDir(ctx context.Context, contents map[string]*fs.Inode, owner fs.FileOwn InodeID: tmpfsDevice.NextIno(), BlockSize: hostarch.PageSize, Type: fs.Directory, - }) + }), nil } // afterLoad is invoked by stateify. @@ -219,11 +232,21 @@ func (d *Dir) SetTimestamps(ctx context.Context, i *fs.Inode, ts fs.TimeSpec) er func (d *Dir) newCreateOps() *ramfs.CreateOps { return &ramfs.CreateOps{ NewDir: func(ctx context.Context, dir *fs.Inode, perms fs.FilePermissions) (*fs.Inode, error) { - return NewDir(ctx, nil, fs.FileOwnerFromContext(ctx), perms, dir.MountSource), nil + return NewDir(ctx, nil, fs.FileOwnerFromContext(ctx), perms, dir.MountSource, dir) }, NewFile: func(ctx context.Context, dir *fs.Inode, perms fs.FilePermissions) (*fs.Inode, error) { + // If the parent has setgid enabled, change the GID of the new file. + owner := fs.FileOwnerFromContext(ctx) + parentUattr, err := dir.UnstableAttr(ctx) + if err != nil { + return nil, err + } + if parentUattr.Perms.SetGID { + owner.GID = parentUattr.Owner.GID + } + uattr := fs.WithCurrentTime(ctx, fs.UnstableAttr{ - Owner: fs.FileOwnerFromContext(ctx), + Owner: owner, Perms: perms, // Always start unlinked. Links: 0, diff --git a/pkg/sentry/fs/user/user_test.go b/pkg/sentry/fs/user/user_test.go index 12b786224..7f8fa8038 100644 --- a/pkg/sentry/fs/user/user_test.go +++ b/pkg/sentry/fs/user/user_test.go @@ -104,7 +104,10 @@ func TestGetExecUserHome(t *testing.T) { t.Run(name, func(t *testing.T) { ctx := contexttest.Context(t) msrc := fs.NewPseudoMountSource(ctx) - rootInode := tmpfs.NewDir(ctx, nil, fs.RootOwner, fs.FilePermsFromMode(0777), msrc) + rootInode, err := tmpfs.NewDir(ctx, nil, fs.RootOwner, fs.FilePermsFromMode(0777), msrc, nil /* parent */) + if err != nil { + t.Fatalf("tmpfs.NewDir failed: %v", err) + } mns, err := fs.NewMountNamespace(ctx, rootInode) if err != nil { diff --git a/pkg/sentry/fsimpl/cgroupfs/base.go b/pkg/sentry/fsimpl/cgroupfs/base.go index 0f54888d8..fe9871bdd 100644 --- a/pkg/sentry/fsimpl/cgroupfs/base.go +++ b/pkg/sentry/fsimpl/cgroupfs/base.go @@ -26,7 +26,6 @@ import ( "gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs" "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" - "gvisor.dev/gvisor/pkg/sentry/vfs" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/usermem" ) @@ -68,11 +67,6 @@ func (c *controllerCommon) Enabled() bool { return true } -// Filesystem implements kernel.CgroupController.Filesystem. -func (c *controllerCommon) Filesystem() *vfs.Filesystem { - return c.fs.VFSFilesystem() -} - // RootCgroup implements kernel.CgroupController.RootCgroup. func (c *controllerCommon) RootCgroup() kernel.Cgroup { return c.fs.rootCgroup() @@ -139,6 +133,17 @@ func (c *cgroupInode) Controllers() []kernel.CgroupController { return c.fs.kcontrollers } +// tasks returns a snapshot of the tasks inside the cgroup. +func (c *cgroupInode) tasks() []*kernel.Task { + c.fs.tasksMu.RLock() + defer c.fs.tasksMu.RUnlock() + ts := make([]*kernel.Task, 0, len(c.ts)) + for t := range c.ts { + ts = append(ts, t) + } + return ts +} + // Enter implements kernel.CgroupImpl.Enter. func (c *cgroupInode) Enter(t *kernel.Task) { c.fs.tasksMu.Lock() @@ -169,10 +174,7 @@ func (d *cgroupProcsData) Generate(ctx context.Context, buf *bytes.Buffer) error pgids := make(map[kernel.ThreadID]struct{}) - d.fs.tasksMu.RLock() - defer d.fs.tasksMu.RUnlock() - - for task := range d.ts { + for _, task := range d.tasks() { // Map dedups pgid, since iterating over all tasks produces multiple // entries for the group leaders. if pgid := currPidns.IDOfThreadGroup(task.ThreadGroup()); pgid != 0 { @@ -211,10 +213,7 @@ func (d *tasksData) Generate(ctx context.Context, buf *bytes.Buffer) error { var pids []kernel.ThreadID - d.fs.tasksMu.RLock() - defer d.fs.tasksMu.RUnlock() - - for task := range d.ts { + for _, task := range d.tasks() { if pid := currPidns.IDOfTask(task); pid != 0 { pids = append(pids, pid) } diff --git a/pkg/sentry/fsimpl/cgroupfs/cgroupfs.go b/pkg/sentry/fsimpl/cgroupfs/cgroupfs.go index bd3e69757..05d7eb4ce 100644 --- a/pkg/sentry/fsimpl/cgroupfs/cgroupfs.go +++ b/pkg/sentry/fsimpl/cgroupfs/cgroupfs.go @@ -49,8 +49,9 @@ // // kernel.CgroupRegistry.mu // cgroupfs.filesystem.mu -// Task.mu -// cgroupfs.filesystem.tasksMu. +// kernel.TaskSet.mu +// kernel.Task.mu +// cgroupfs.filesystem.tasksMu. package cgroupfs import ( @@ -109,7 +110,7 @@ type InternalData struct { DefaultControlValues map[string]int64 } -// filesystem implements vfs.FilesystemImpl. +// filesystem implements vfs.FilesystemImpl and kernel.cgroupFS. // // +stateify savable type filesystem struct { @@ -139,6 +140,11 @@ type filesystem struct { tasksMu sync.RWMutex `state:"nosave"` } +// InitializeHierarchyID implements kernel.cgroupFS.InitializeHierarchyID. +func (fs *filesystem) InitializeHierarchyID(hid uint32) { + fs.hierarchyID = hid +} + // Name implements vfs.FilesystemType.Name. func (FilesystemType) Name() string { return Name @@ -284,14 +290,12 @@ func (fsType FilesystemType) GetFilesystem(ctx context.Context, vfsObj *vfs.Virt // Register controllers. The registry may be modified concurrently, so if we // get an error, we raced with someone else who registered the same // controllers first. - hid, err := r.Register(fs.kcontrollers) - if err != nil { + if err := r.Register(fs.kcontrollers, fs); err != nil { ctx.Infof("cgroupfs.FilesystemType.GetFilesystem: failed to register new hierarchy with controllers %v: %v", wantControllers, err) rootD.DecRef(ctx) fs.VFSFilesystem().DecRef(ctx) return nil, nil, syserror.EBUSY } - fs.hierarchyID = hid // Move all existing tasks to the root of the new hierarchy. k.PopulateNewCgroupHierarchy(fs.rootCgroup()) diff --git a/pkg/sentry/fsimpl/gofer/BUILD b/pkg/sentry/fsimpl/gofer/BUILD index 52879f871..368272f12 100644 --- a/pkg/sentry/fsimpl/gofer/BUILD +++ b/pkg/sentry/fsimpl/gofer/BUILD @@ -54,6 +54,7 @@ go_library( "//pkg/fspath", "//pkg/hostarch", "//pkg/log", + "//pkg/metric", "//pkg/p9", "//pkg/refs", "//pkg/refsvfs2", diff --git a/pkg/sentry/fsimpl/gofer/filesystem.go b/pkg/sentry/fsimpl/gofer/filesystem.go index 97ce80853..eb09d54c3 100644 --- a/pkg/sentry/fsimpl/gofer/filesystem.go +++ b/pkg/sentry/fsimpl/gofer/filesystem.go @@ -961,7 +961,7 @@ func (d *dentry) open(ctx context.Context, rp *vfs.ResolvingPath, opts *vfs.Open } return &fd.vfsfd, nil case linux.S_IFLNK: - // Can't open symlinks without O_PATH (which is unimplemented). + // Can't open symlinks without O_PATH, which is handled at the VFS layer. return nil, syserror.ELOOP case linux.S_IFSOCK: if d.isSynthetic() { @@ -1194,11 +1194,7 @@ func (fs *filesystem) ReadlinkAt(ctx context.Context, rp *vfs.ResolvingPath) (st // RenameAt implements vfs.FilesystemImpl.RenameAt. func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldParentVD vfs.VirtualDentry, oldName string, opts vfs.RenameOptions) error { - if opts.Flags != 0 { - // Requires 9P support. - return syserror.EINVAL - } - + // Resolve newParent first to verify that it's on this Mount. var ds *[]*dentry fs.renameMu.Lock() defer fs.renameMuUnlockAndCheckCaching(ctx, &ds) @@ -1206,8 +1202,21 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa if err != nil { return err } + + if opts.Flags&^linux.RENAME_NOREPLACE != 0 { + return syserror.EINVAL + } + if fs.opts.interop == InteropModeShared && opts.Flags&linux.RENAME_NOREPLACE != 0 { + // Requires 9P support to synchronize with other remote filesystem + // users. + return syserror.EINVAL + } + newName := rp.Component() if newName == "." || newName == ".." { + if opts.Flags&linux.RENAME_NOREPLACE != 0 { + return syserror.EEXIST + } return syserror.EBUSY } mnt := rp.Mount() @@ -1280,6 +1289,9 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa } var replacedVFSD *vfs.Dentry if replaced != nil { + if opts.Flags&linux.RENAME_NOREPLACE != 0 { + return syserror.EEXIST + } replacedVFSD = &replaced.vfsd if replaced.isDir() { if !renamed.isDir() { diff --git a/pkg/sentry/fsimpl/gofer/gofer.go b/pkg/sentry/fsimpl/gofer/gofer.go index 21692d2ac..cf69e1b7a 100644 --- a/pkg/sentry/fsimpl/gofer/gofer.go +++ b/pkg/sentry/fsimpl/gofer/gofer.go @@ -1282,9 +1282,12 @@ func (d *dentry) checkPermissions(creds *auth.Credentials, ats vfs.AccessTypes) } func (d *dentry) checkXattrPermissions(creds *auth.Credentials, name string, ats vfs.AccessTypes) error { - // We only support xattrs prefixed with "user." (see b/148380782). Currently, - // there is no need to expose any other xattrs through a gofer. - if !strings.HasPrefix(name, linux.XATTR_USER_PREFIX) { + // Deny access to the "security" and "system" namespaces since applications + // may expect these to affect kernel behavior in unimplemented ways + // (b/148380782). Allow all other extended attributes to be passed through + // to the remote filesystem. This is inconsistent with Linux's 9p client, + // but consistent with other filesystems (e.g. FUSE). + if strings.HasPrefix(name, linux.XATTR_SECURITY_PREFIX) || strings.HasPrefix(name, linux.XATTR_SYSTEM_PREFIX) { return syserror.EOPNOTSUPP } mode := linux.FileMode(atomic.LoadUint32(&d.mode)) @@ -1684,7 +1687,7 @@ func (d *dentry) setDeleted() { } func (d *dentry) listXattr(ctx context.Context, creds *auth.Credentials, size uint64) ([]string, error) { - if d.file.isNil() || !d.userXattrSupported() { + if d.file.isNil() { return nil, nil } xattrMap, err := d.file.listXattr(ctx, size) @@ -1693,10 +1696,7 @@ func (d *dentry) listXattr(ctx context.Context, creds *auth.Credentials, size ui } xattrs := make([]string, 0, len(xattrMap)) for x := range xattrMap { - // We only support xattrs in the user.* namespace. - if strings.HasPrefix(x, linux.XATTR_USER_PREFIX) { - xattrs = append(xattrs, x) - } + xattrs = append(xattrs, x) } return xattrs, nil } @@ -1731,13 +1731,6 @@ func (d *dentry) removeXattr(ctx context.Context, creds *auth.Credentials, name return d.file.removeXattr(ctx, name) } -// Extended attributes in the user.* namespace are only supported for regular -// files and directories. -func (d *dentry) userXattrSupported() bool { - filetype := linux.FileMode(atomic.LoadUint32(&d.mode)).FileType() - return filetype == linux.ModeRegular || filetype == linux.ModeDirectory -} - // Preconditions: // * !d.isSynthetic(). // * d.isRegularFile() || d.isDir(). diff --git a/pkg/sentry/fsimpl/gofer/regular_file.go b/pkg/sentry/fsimpl/gofer/regular_file.go index f0e7bbaf7..eed05e369 100644 --- a/pkg/sentry/fsimpl/gofer/regular_file.go +++ b/pkg/sentry/fsimpl/gofer/regular_file.go @@ -24,6 +24,7 @@ import ( "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/log" + "gvisor.dev/gvisor/pkg/metric" "gvisor.dev/gvisor/pkg/p9" "gvisor.dev/gvisor/pkg/safemem" "gvisor.dev/gvisor/pkg/sentry/fs/fsutil" @@ -59,7 +60,7 @@ func newRegularFileFD(mnt *vfs.Mount, d *dentry, flags uint32) (*regularFileFD, return nil, err } if fd.vfsfd.IsWritable() && (atomic.LoadUint32(&d.mode)&0111 != 0) { - fsmetric.GoferOpensWX.Increment() + metric.SuspiciousOperationsMetric.Increment("opened_write_execute_file") } if atomic.LoadInt32(&d.mmapFD) >= 0 { fsmetric.GoferOpensHost.Increment() diff --git a/pkg/sentry/fsimpl/gofer/special_file.go b/pkg/sentry/fsimpl/gofer/special_file.go index ac3b5b621..c12444b7e 100644 --- a/pkg/sentry/fsimpl/gofer/special_file.go +++ b/pkg/sentry/fsimpl/gofer/special_file.go @@ -21,6 +21,7 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/fdnotifier" + "gvisor.dev/gvisor/pkg/metric" "gvisor.dev/gvisor/pkg/p9" "gvisor.dev/gvisor/pkg/safemem" "gvisor.dev/gvisor/pkg/sentry/fsmetric" @@ -100,7 +101,7 @@ func newSpecialFileFD(h handle, mnt *vfs.Mount, d *dentry, flags uint32) (*speci d.fs.specialFileFDs[fd] = struct{}{} d.fs.syncMu.Unlock() if fd.vfsfd.IsWritable() && (atomic.LoadUint32(&d.mode)&0111 != 0) { - fsmetric.GoferOpensWX.Increment() + metric.SuspiciousOperationsMetric.Increment("opened_write_execute_file") } if h.fd >= 0 { fsmetric.GoferOpensHost.Increment() diff --git a/pkg/sentry/fsimpl/kernfs/filesystem.go b/pkg/sentry/fsimpl/kernfs/filesystem.go index f50b0fb08..8fac53c60 100644 --- a/pkg/sentry/fsimpl/kernfs/filesystem.go +++ b/pkg/sentry/fsimpl/kernfs/filesystem.go @@ -635,12 +635,6 @@ func (fs *Filesystem) ReadlinkAt(ctx context.Context, rp *vfs.ResolvingPath) (st // RenameAt implements vfs.FilesystemImpl.RenameAt. func (fs *Filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldParentVD vfs.VirtualDentry, oldName string, opts vfs.RenameOptions) error { - // Only RENAME_NOREPLACE is supported. - if opts.Flags&^linux.RENAME_NOREPLACE != 0 { - return syserror.EINVAL - } - noReplace := opts.Flags&linux.RENAME_NOREPLACE != 0 - fs.mu.Lock() defer fs.processDeferredDecRefs(ctx) defer fs.mu.Unlock() @@ -651,6 +645,13 @@ func (fs *Filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa if err != nil { return err } + + // Only RENAME_NOREPLACE is supported. + if opts.Flags&^linux.RENAME_NOREPLACE != 0 { + return syserror.EINVAL + } + noReplace := opts.Flags&linux.RENAME_NOREPLACE != 0 + mnt := rp.Mount() if mnt != oldParentVD.Mount() { return syserror.EXDEV diff --git a/pkg/sentry/fsimpl/overlay/filesystem.go b/pkg/sentry/fsimpl/overlay/filesystem.go index 46c500427..6b6fa0bd5 100644 --- a/pkg/sentry/fsimpl/overlay/filesystem.go +++ b/pkg/sentry/fsimpl/overlay/filesystem.go @@ -1017,10 +1017,7 @@ func (fs *filesystem) ReadlinkAt(ctx context.Context, rp *vfs.ResolvingPath) (st // RenameAt implements vfs.FilesystemImpl.RenameAt. func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldParentVD vfs.VirtualDentry, oldName string, opts vfs.RenameOptions) error { - if opts.Flags != 0 { - return syserror.EINVAL - } - + // Resolve newParent first to verify that it's on this Mount. var ds *[]*dentry fs.renameMu.Lock() defer fs.renameMuUnlockAndCheckDrop(ctx, &ds) @@ -1028,8 +1025,16 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa if err != nil { return err } + + if opts.Flags&^linux.RENAME_NOREPLACE != 0 { + return syserror.EINVAL + } + newName := rp.Component() if newName == "." || newName == ".." { + if opts.Flags&linux.RENAME_NOREPLACE != 0 { + return syserror.EEXIST + } return syserror.EBUSY } mnt := rp.Mount() @@ -1093,6 +1098,9 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa return err } if replaced != nil { + if opts.Flags&linux.RENAME_NOREPLACE != 0 { + return syserror.EEXIST + } replacedVFSD = &replaced.vfsd if replaced.isDir() { if !renamed.isDir() { diff --git a/pkg/sentry/fsimpl/overlay/regular_file.go b/pkg/sentry/fsimpl/overlay/regular_file.go index 43bfd69a3..82491a0f8 100644 --- a/pkg/sentry/fsimpl/overlay/regular_file.go +++ b/pkg/sentry/fsimpl/overlay/regular_file.go @@ -207,9 +207,10 @@ func (fd *regularFileFD) SetStat(ctx context.Context, opts vfs.SetStatOptions) e return err } - // Changing owners may clear one or both of the setuid and setgid bits, - // so we may have to update opts before setting d.mode. - if opts.Stat.Mask&(linux.STATX_UID|linux.STATX_GID) != 0 { + // Changing owners or truncating may clear one or both of the setuid and + // setgid bits, so we may have to update opts before setting d.mode. + inotifyMask := opts.Stat.Mask + if opts.Stat.Mask&(linux.STATX_UID|linux.STATX_GID|linux.STATX_SIZE) != 0 { stat, err := wrappedFD.Stat(ctx, vfs.StatOptions{ Mask: linux.STATX_MODE, }) @@ -218,10 +219,14 @@ func (fd *regularFileFD) SetStat(ctx context.Context, opts vfs.SetStatOptions) e } opts.Stat.Mode = stat.Mode opts.Stat.Mask |= linux.STATX_MODE + // Don't generate inotify IN_ATTRIB for size-only changes (truncations). + if opts.Stat.Mask&(linux.STATX_UID|linux.STATX_GID) != 0 { + inotifyMask |= linux.STATX_MODE + } } d.updateAfterSetStatLocked(&opts) - if ev := vfs.InotifyEventFromStatMask(opts.Stat.Mask); ev != 0 { + if ev := vfs.InotifyEventFromStatMask(inotifyMask); ev != 0 { d.InotifyWithParent(ctx, ev, 0, vfs.InodeEvent) } return nil diff --git a/pkg/sentry/fsimpl/proc/tasks_sys.go b/pkg/sentry/fsimpl/proc/tasks_sys.go index 9b14dd6b9..2bc98a94f 100644 --- a/pkg/sentry/fsimpl/proc/tasks_sys.go +++ b/pkg/sentry/fsimpl/proc/tasks_sys.go @@ -55,6 +55,7 @@ func (fs *filesystem) newSysDir(ctx context.Context, root *auth.Credentials, k * }), }), "vm": fs.newStaticDir(ctx, root, map[string]kernfs.Inode{ + "max_map_count": fs.newInode(ctx, root, 0444, newStaticFile("2147483647\n")), "mmap_min_addr": fs.newInode(ctx, root, 0444, &mmapMinAddrData{k: k}), "overcommit_memory": fs.newInode(ctx, root, 0444, newStaticFile("0\n")), }), @@ -365,27 +366,22 @@ func (d *tcpMemData) writeSizeLocked(size inet.TCPBufferSize) error { } // ipForwarding implements vfs.WritableDynamicBytesSource for -// /proc/sys/net/ipv4/ip_forwarding. +// /proc/sys/net/ipv4/ip_forward. // // +stateify savable type ipForwarding struct { kernfs.DynamicBytesFile stack inet.Stack `state:"wait"` - enabled *bool + enabled bool } var _ vfs.WritableDynamicBytesSource = (*ipForwarding)(nil) // Generate implements vfs.DynamicBytesSource.Generate. func (ipf *ipForwarding) Generate(ctx context.Context, buf *bytes.Buffer) error { - if ipf.enabled == nil { - enabled := ipf.stack.Forwarding(ipv4.ProtocolNumber) - ipf.enabled = &enabled - } - val := "0\n" - if *ipf.enabled { + if ipf.enabled { // Technically, this is not quite compatible with Linux. Linux stores these // as an integer, so if you write "2" into tcp_sack, you should get 2 back. // Tough luck. @@ -414,11 +410,8 @@ func (ipf *ipForwarding) Write(ctx context.Context, src usermem.IOSequence, offs if err != nil { return 0, err } - if ipf.enabled == nil { - ipf.enabled = new(bool) - } - *ipf.enabled = v != 0 - if err := ipf.stack.SetForwarding(ipv4.ProtocolNumber, *ipf.enabled); err != nil { + ipf.enabled = v != 0 + if err := ipf.stack.SetForwarding(ipv4.ProtocolNumber, ipf.enabled); err != nil { return 0, err } return n, nil diff --git a/pkg/sentry/fsimpl/proc/tasks_sys_test.go b/pkg/sentry/fsimpl/proc/tasks_sys_test.go index 6cee22823..19b012f7d 100644 --- a/pkg/sentry/fsimpl/proc/tasks_sys_test.go +++ b/pkg/sentry/fsimpl/proc/tasks_sys_test.go @@ -132,7 +132,7 @@ func TestConfigureIPForwarding(t *testing.T) { t.Run(c.comment, func(t *testing.T) { s.IPForwarding = c.initial - file := &ipForwarding{stack: s, enabled: &c.initial} + file := &ipForwarding{stack: s, enabled: c.initial} // Write the values. src := usermem.BytesIOSequence([]byte(c.str)) diff --git a/pkg/sentry/fsimpl/testutil/BUILD b/pkg/sentry/fsimpl/testutil/BUILD index c766164c7..b3f9d1010 100644 --- a/pkg/sentry/fsimpl/testutil/BUILD +++ b/pkg/sentry/fsimpl/testutil/BUILD @@ -17,7 +17,6 @@ go_library( "//pkg/fspath", "//pkg/hostarch", "//pkg/memutil", - "//pkg/metric", "//pkg/sentry/fsbridge", "//pkg/sentry/fsimpl/tmpfs", "//pkg/sentry/kernel", diff --git a/pkg/sentry/fsimpl/testutil/kernel.go b/pkg/sentry/fsimpl/testutil/kernel.go index 33e52ce64..97aa20cd1 100644 --- a/pkg/sentry/fsimpl/testutil/kernel.go +++ b/pkg/sentry/fsimpl/testutil/kernel.go @@ -25,7 +25,6 @@ import ( "gvisor.dev/gvisor/pkg/cpuid" "gvisor.dev/gvisor/pkg/fspath" "gvisor.dev/gvisor/pkg/memutil" - "gvisor.dev/gvisor/pkg/metric" "gvisor.dev/gvisor/pkg/sentry/fsbridge" "gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs" "gvisor.dev/gvisor/pkg/sentry/kernel" @@ -63,8 +62,6 @@ func Boot() (*kernel.Kernel, error) { return nil, fmt.Errorf("creating platform: %v", err) } - metric.CreateSentryMetrics() - kernel.VFS2Enabled = true k := &kernel.Kernel{ Platform: plat, @@ -88,6 +85,7 @@ func Boot() (*kernel.Kernel, error) { return nil, fmt.Errorf("creating timekeeper: %v", err) } tk.SetClocks(time.NewCalibratedClocks()) + k.SetTimekeeper(tk) creds := auth.NewRootCredentials(auth.NewRootUserNamespace()) @@ -96,7 +94,6 @@ func Boot() (*kernel.Kernel, error) { if err = k.Init(kernel.InitKernelArgs{ ApplicationCores: uint(runtime.GOMAXPROCS(-1)), FeatureSet: cpuid.HostFeatureSet(), - Timekeeper: tk, RootUserNamespace: creds.UserNamespace, Vdso: vdso, RootUTSNamespace: kernel.NewUTSNamespace("hostname", "domain", creds.UserNamespace), @@ -181,7 +178,7 @@ func createMemoryFile() (*pgalloc.MemoryFile, error) { memfile := os.NewFile(uintptr(memfd), memfileName) mf, err := pgalloc.NewMemoryFile(memfile, pgalloc.MemoryFileOpts{}) if err != nil { - memfile.Close() + _ = memfile.Close() return nil, fmt.Errorf("error creating pgalloc.MemoryFile: %v", err) } return mf, nil diff --git a/pkg/sentry/fsimpl/tmpfs/filesystem.go b/pkg/sentry/fsimpl/tmpfs/filesystem.go index 5fdca1d46..f0f4297ef 100644 --- a/pkg/sentry/fsimpl/tmpfs/filesystem.go +++ b/pkg/sentry/fsimpl/tmpfs/filesystem.go @@ -465,7 +465,7 @@ func (d *dentry) open(ctx context.Context, rp *vfs.ResolvingPath, opts *vfs.Open } return &fd.vfsfd, nil case *symlink: - // TODO(gvisor.dev/issue/2782): Can't open symlinks without O_PATH. + // Can't open symlinks without O_PATH, which is handled at the VFS layer. return nil, syserror.ELOOP case *namedPipe: return impl.pipe.Open(ctx, rp.Mount(), &d.vfsd, opts.Flags, &d.inode.locks) @@ -496,20 +496,24 @@ func (fs *filesystem) ReadlinkAt(ctx context.Context, rp *vfs.ResolvingPath) (st // RenameAt implements vfs.FilesystemImpl.RenameAt. func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldParentVD vfs.VirtualDentry, oldName string, opts vfs.RenameOptions) error { - if opts.Flags != 0 { - // TODO(b/145974740): Support renameat2 flags. - return syserror.EINVAL - } - - // Resolve newParent first to verify that it's on this Mount. + // Resolve newParentDir first to verify that it's on this Mount. fs.mu.Lock() defer fs.mu.Unlock() newParentDir, err := walkParentDirLocked(ctx, rp, rp.Start().Impl().(*dentry)) if err != nil { return err } + + if opts.Flags&^linux.RENAME_NOREPLACE != 0 { + // TODO(b/145974740): Support other renameat2 flags. + return syserror.EINVAL + } + newName := rp.Component() if newName == "." || newName == ".." { + if opts.Flags&linux.RENAME_NOREPLACE != 0 { + return syserror.EEXIST + } return syserror.EBUSY } mnt := rp.Mount() @@ -556,6 +560,9 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa } replaced, ok := newParentDir.childMap[newName] if ok { + if opts.Flags&linux.RENAME_NOREPLACE != 0 { + return syserror.EEXIST + } replacedDir, ok := replaced.inode.impl.(*directory) if ok { if !renamed.inode.isDir() { @@ -815,7 +822,7 @@ func (fs *filesystem) ListXattrAt(ctx context.Context, rp *vfs.ResolvingPath, si if err != nil { return nil, err } - return d.inode.listXattr(size) + return d.inode.listXattr(rp.Credentials(), size) } // GetXattrAt implements vfs.FilesystemImpl.GetXattrAt. diff --git a/pkg/sentry/fsimpl/tmpfs/tmpfs.go b/pkg/sentry/fsimpl/tmpfs/tmpfs.go index 9ae25ce9e..6b4367c42 100644 --- a/pkg/sentry/fsimpl/tmpfs/tmpfs.go +++ b/pkg/sentry/fsimpl/tmpfs/tmpfs.go @@ -717,44 +717,63 @@ func (i *inode) touchCMtimeLocked() { atomic.StoreInt64(&i.ctime, now) } -func (i *inode) listXattr(size uint64) ([]string, error) { - return i.xattrs.ListXattr(size) +func checkXattrName(name string) error { + // Linux's tmpfs supports "security" and "trusted" xattr namespaces, and + // (depending on build configuration) POSIX ACL xattr namespaces + // ("system.posix_acl_access" and "system.posix_acl_default"). We don't + // support POSIX ACLs or the "security" namespace (b/148380782). + if strings.HasPrefix(name, linux.XATTR_TRUSTED_PREFIX) { + return nil + } + // We support the "user" namespace because we have tests that depend on + // this feature. + if strings.HasPrefix(name, linux.XATTR_USER_PREFIX) { + return nil + } + return syserror.EOPNOTSUPP +} + +func (i *inode) listXattr(creds *auth.Credentials, size uint64) ([]string, error) { + return i.xattrs.ListXattr(creds, size) } func (i *inode) getXattr(creds *auth.Credentials, opts *vfs.GetXattrOptions) (string, error) { - if err := i.checkXattrPermissions(creds, opts.Name, vfs.MayRead); err != nil { + if err := checkXattrName(opts.Name); err != nil { return "", err } - return i.xattrs.GetXattr(opts) + mode := linux.FileMode(atomic.LoadUint32(&i.mode)) + kuid := auth.KUID(atomic.LoadUint32(&i.uid)) + kgid := auth.KGID(atomic.LoadUint32(&i.gid)) + if err := vfs.GenericCheckPermissions(creds, vfs.MayRead, mode, kuid, kgid); err != nil { + return "", err + } + return i.xattrs.GetXattr(creds, mode, kuid, opts) } func (i *inode) setXattr(creds *auth.Credentials, opts *vfs.SetXattrOptions) error { - if err := i.checkXattrPermissions(creds, opts.Name, vfs.MayWrite); err != nil { + if err := checkXattrName(opts.Name); err != nil { return err } - return i.xattrs.SetXattr(opts) -} - -func (i *inode) removeXattr(creds *auth.Credentials, name string) error { - if err := i.checkXattrPermissions(creds, name, vfs.MayWrite); err != nil { + mode := linux.FileMode(atomic.LoadUint32(&i.mode)) + kuid := auth.KUID(atomic.LoadUint32(&i.uid)) + kgid := auth.KGID(atomic.LoadUint32(&i.gid)) + if err := vfs.GenericCheckPermissions(creds, vfs.MayWrite, mode, kuid, kgid); err != nil { return err } - return i.xattrs.RemoveXattr(name) + return i.xattrs.SetXattr(creds, mode, kuid, opts) } -func (i *inode) checkXattrPermissions(creds *auth.Credentials, name string, ats vfs.AccessTypes) error { - // We currently only support extended attributes in the user.* and - // trusted.* namespaces. See b/148380782. - if !strings.HasPrefix(name, linux.XATTR_USER_PREFIX) && !strings.HasPrefix(name, linux.XATTR_TRUSTED_PREFIX) { - return syserror.EOPNOTSUPP +func (i *inode) removeXattr(creds *auth.Credentials, name string) error { + if err := checkXattrName(name); err != nil { + return err } mode := linux.FileMode(atomic.LoadUint32(&i.mode)) kuid := auth.KUID(atomic.LoadUint32(&i.uid)) kgid := auth.KGID(atomic.LoadUint32(&i.gid)) - if err := vfs.GenericCheckPermissions(creds, ats, mode, kuid, kgid); err != nil { + if err := vfs.GenericCheckPermissions(creds, vfs.MayWrite, mode, kuid, kgid); err != nil { return err } - return vfs.CheckXattrPermissions(creds, ats, mode, kuid, name) + return i.xattrs.RemoveXattr(creds, mode, kuid, name) } // fileDescription is embedded by tmpfs implementations of @@ -807,7 +826,7 @@ func (fd *fileDescription) StatFS(ctx context.Context) (linux.Statfs, error) { // ListXattr implements vfs.FileDescriptionImpl.ListXattr. func (fd *fileDescription) ListXattr(ctx context.Context, size uint64) ([]string, error) { - return fd.inode().listXattr(size) + return fd.inode().listXattr(auth.CredentialsFromContext(ctx), size) } // GetXattr implements vfs.FileDescriptionImpl.GetXattr. diff --git a/pkg/sentry/fsimpl/verity/verity.go b/pkg/sentry/fsimpl/verity/verity.go index 31d34ef60..969003613 100644 --- a/pkg/sentry/fsimpl/verity/verity.go +++ b/pkg/sentry/fsimpl/verity/verity.go @@ -868,6 +868,10 @@ func (fd *fileDescription) IterDirents(ctx context.Context, cb vfs.IterDirentsCa fd.mu.Lock() defer fd.mu.Unlock() + if _, err := fd.lowerFD.Seek(ctx, fd.off, linux.SEEK_SET); err != nil { + return err + } + var ds []vfs.Dirent err := fd.lowerFD.IterDirents(ctx, vfs.IterDirentsCallbackFunc(func(dirent vfs.Dirent) error { // Do not include the Merkle tree files. @@ -890,8 +894,8 @@ func (fd *fileDescription) IterDirents(ctx context.Context, cb vfs.IterDirentsCa return err } - // The result should contain all children plus "." and "..". - if fd.d.verityEnabled() && len(ds) != len(fd.d.childrenNames)+2 { + // The result should be a part of all children plus "." and "..", counting from fd.off. + if fd.d.verityEnabled() && len(ds) != len(fd.d.childrenNames)+2-int(fd.off) { return fd.d.fs.alertIntegrityViolation(fmt.Sprintf("Unexpected children number %d", len(ds))) } @@ -1299,6 +1303,11 @@ func (fd *fileDescription) ConfigureMMap(ctx context.Context, opts *memmap.MMapO return vfs.GenericConfigureMMap(&fd.vfsfd, fd, opts) } +// SupportsLocks implements vfs.FileDescriptionImpl.SupportsLocks. +func (fd *fileDescription) SupportsLocks() bool { + return fd.lowerFD.SupportsLocks() +} + // LockBSD implements vfs.FileDescriptionImpl.LockBSD. func (fd *fileDescription) LockBSD(ctx context.Context, uid fslock.UniqueID, ownerPID int32, t fslock.LockType, block fslock.Blocker) error { return fd.lowerFD.LockBSD(ctx, ownerPID, t, block) diff --git a/pkg/sentry/fsmetric/fsmetric.go b/pkg/sentry/fsmetric/fsmetric.go index 7e535b527..17d0d5025 100644 --- a/pkg/sentry/fsmetric/fsmetric.go +++ b/pkg/sentry/fsmetric/fsmetric.go @@ -42,7 +42,6 @@ var ( // Metrics that only apply to fs/gofer and fsimpl/gofer. var ( - GoferOpensWX = metric.MustCreateNewUint64Metric("/gofer/opened_write_execute_file", true /* sync */, "Number of times a executable file was opened writably from a gofer.") GoferOpens9P = metric.MustCreateNewUint64Metric("/gofer/opens_9p", false /* sync */, "Number of times a file was opened from a gofer and did not have a host file descriptor.") GoferOpensHost = metric.MustCreateNewUint64Metric("/gofer/opens_host", false /* sync */, "Number of times a file was opened from a gofer and did have a host file descriptor.") GoferReads9P = metric.MustCreateNewUint64Metric("/gofer/reads_9p", false /* sync */, "Number of 9P file reads from a gofer.") diff --git a/pkg/sentry/inet/inet.go b/pkg/sentry/inet/inet.go index 6b71bd3a9..80dda1559 100644 --- a/pkg/sentry/inet/inet.go +++ b/pkg/sentry/inet/inet.go @@ -88,9 +88,6 @@ type Stack interface { // for restoring a stack after a save. RestoreCleanupEndpoints([]stack.TransportEndpoint) - // Forwarding returns if packet forwarding between NICs is enabled. - Forwarding(protocol tcpip.NetworkProtocolNumber) bool - // SetForwarding enables or disables packet forwarding between NICs. SetForwarding(protocol tcpip.NetworkProtocolNumber, enable bool) error diff --git a/pkg/sentry/inet/test_stack.go b/pkg/sentry/inet/test_stack.go index 03e2608c2..218d9dafc 100644 --- a/pkg/sentry/inet/test_stack.go +++ b/pkg/sentry/inet/test_stack.go @@ -154,11 +154,6 @@ func (s *TestStack) CleanupEndpoints() []stack.TransportEndpoint { // RestoreCleanupEndpoints implements inet.Stack.RestoreCleanupEndpoints. func (s *TestStack) RestoreCleanupEndpoints([]stack.TransportEndpoint) {} -// Forwarding implements inet.Stack.Forwarding. -func (s *TestStack) Forwarding(protocol tcpip.NetworkProtocolNumber) bool { - return s.IPForwarding -} - // SetForwarding implements inet.Stack.SetForwarding. func (s *TestStack) SetForwarding(protocol tcpip.NetworkProtocolNumber, enable bool) error { s.IPForwarding = enable diff --git a/pkg/sentry/kernel/BUILD b/pkg/sentry/kernel/BUILD index a1ec6daab..188c0ebff 100644 --- a/pkg/sentry/kernel/BUILD +++ b/pkg/sentry/kernel/BUILD @@ -32,7 +32,7 @@ go_template_instance( out = "seqatomic_taskgoroutineschedinfo_unsafe.go", package = "kernel", suffix = "TaskGoroutineSchedInfo", - template = "//pkg/sync:generic_seqatomic", + template = "//pkg/sync/seqatomic:generic_seqatomic", types = { "Value": "TaskGoroutineSchedInfo", }, diff --git a/pkg/sentry/kernel/auth/BUILD b/pkg/sentry/kernel/auth/BUILD index 869e49ebc..12180351d 100644 --- a/pkg/sentry/kernel/auth/BUILD +++ b/pkg/sentry/kernel/auth/BUILD @@ -8,7 +8,7 @@ go_template_instance( out = "atomicptr_credentials_unsafe.go", package = "auth", suffix = "Credentials", - template = "//pkg/sync:generic_atomicptr", + template = "//pkg/sync/atomicptr:generic_atomicptr", types = { "Value": "Credentials", }, diff --git a/pkg/sentry/kernel/auth/credentials.go b/pkg/sentry/kernel/auth/credentials.go index 6862f2ef5..3325fedcb 100644 --- a/pkg/sentry/kernel/auth/credentials.go +++ b/pkg/sentry/kernel/auth/credentials.go @@ -125,7 +125,7 @@ func NewUserCredentials(kuid KUID, kgid KGID, extraKGIDs []KGID, capabilities *T creds.EffectiveCaps = capabilities.EffectiveCaps creds.BoundingCaps = capabilities.BoundingCaps creds.InheritableCaps = capabilities.InheritableCaps - // TODO(nlacasse): Support ambient capabilities. + // TODO(gvisor.dev/issue/3166): Support ambient capabilities. } else { // If no capabilities are specified, grant capabilities consistent with // setresuid + setresgid from NewRootCredentials to the given uid and diff --git a/pkg/sentry/kernel/cgroup.go b/pkg/sentry/kernel/cgroup.go index 1f1c63f37..c93ef6ac1 100644 --- a/pkg/sentry/kernel/cgroup.go +++ b/pkg/sentry/kernel/cgroup.go @@ -48,10 +48,6 @@ type CgroupController interface { // attached to. Returned value is valid for the lifetime of the controller. HierarchyID() uint32 - // Filesystem returns the filesystem this controller is attached to. - // Returned value is valid for the lifetime of the controller. - Filesystem() *vfs.Filesystem - // RootCgroup returns the root cgroup for this controller. Returned value is // valid for the lifetime of the controller. RootCgroup() Cgroup @@ -124,6 +120,19 @@ func (h *hierarchy) match(ctypes []CgroupControllerType) bool { return true } +// cgroupFS is the public interface to cgroupfs. This lets the kernel package +// refer to cgroupfs.filesystem methods without directly depending on the +// cgroupfs package, which would lead to a circular dependency. +type cgroupFS interface { + // Returns the vfs.Filesystem for the cgroupfs. + VFSFilesystem() *vfs.Filesystem + + // InitializeHierarchyID sets the hierarchy ID for this filesystem during + // filesystem creation. May only be called before the filesystem is visible + // to the vfs layer. + InitializeHierarchyID(hid uint32) +} + // CgroupRegistry tracks the active set of cgroup controllers on the system. // // +stateify savable @@ -172,7 +181,23 @@ func (r *CgroupRegistry) FindHierarchy(ctypes []CgroupControllerType) *vfs.Files for _, h := range r.hierarchies { if h.match(ctypes) { - h.fs.IncRef() + if !h.fs.TryIncRef() { + // Racing with filesystem destruction, namely h.fs.Release. + // Since we hold r.mu, we know the hierarchy hasn't been + // unregistered yet, but its associated filesystem is tearing + // down. + // + // If we simply indicate the hierarchy wasn't found without + // cleaning up the registry, the caller can race with the + // unregister and find itself temporarily unable to create a new + // hierarchy with a subset of the relevant controllers. + // + // To keep the result of FindHierarchy consistent with the + // uniqueness of controllers enforced by Register, drop the + // dying hierarchy now. The eventual unregister by the FS + // teardown will become a no-op. + return nil + } return h.fs } } @@ -182,31 +207,35 @@ func (r *CgroupRegistry) FindHierarchy(ctypes []CgroupControllerType) *vfs.Files // Register registers the provided set of controllers with the registry as a new // hierarchy. If any controller is already registered, the function returns an -// error without modifying the registry. The hierarchy can be later referenced -// by the returned id. -func (r *CgroupRegistry) Register(cs []CgroupController) (uint32, error) { +// error without modifying the registry. Register sets the hierarchy ID for the +// filesystem on success. +func (r *CgroupRegistry) Register(cs []CgroupController, fs cgroupFS) error { r.mu.Lock() defer r.mu.Unlock() if len(cs) == 0 { - return InvalidCgroupHierarchyID, fmt.Errorf("can't register hierarchy with no controllers") + return fmt.Errorf("can't register hierarchy with no controllers") } for _, c := range cs { if _, ok := r.controllers[c.Type()]; ok { - return InvalidCgroupHierarchyID, fmt.Errorf("controllers may only be mounted on a single hierarchy") + return fmt.Errorf("controllers may only be mounted on a single hierarchy") } } hid, err := r.nextHierarchyID() if err != nil { - return hid, err + return err } + // Must not fail below here, once we publish the hierarchy ID. + + fs.InitializeHierarchyID(hid) + h := hierarchy{ id: hid, controllers: make(map[CgroupControllerType]CgroupController), - fs: cs[0].Filesystem(), + fs: fs.VFSFilesystem(), } for _, c := range cs { n := c.Type() @@ -214,15 +243,20 @@ func (r *CgroupRegistry) Register(cs []CgroupController) (uint32, error) { h.controllers[n] = c } r.hierarchies[hid] = h - return hid, nil + return nil } -// Unregister removes a previously registered hierarchy from the registry. If -// the controller was not previously registered, Unregister is a no-op. +// Unregister removes a previously registered hierarchy from the registry. If no +// such hierarchy is registered, Unregister is a no-op. func (r *CgroupRegistry) Unregister(hid uint32) { r.mu.Lock() - defer r.mu.Unlock() + r.unregisterLocked(hid) + r.mu.Unlock() +} +// Precondition: Caller must hold r.mu. +// +checklocks:r.mu +func (r *CgroupRegistry) unregisterLocked(hid uint32) { if h, ok := r.hierarchies[hid]; ok { for name, _ := range h.controllers { delete(r.controllers, name) @@ -253,6 +287,11 @@ func (r *CgroupRegistry) computeInitialGroups(inherit map[Cgroup]struct{}) map[C for name, ctl := range r.controllers { if _, ok := ctlSet[name]; !ok { cg := ctl.RootCgroup() + // Multiple controllers may share the same hierarchy, so may have + // the same root cgroup. Grab a single ref per hierarchy root. + if _, ok := cgset[cg]; ok { + continue + } cg.IncRef() // Ref transferred to caller. cgset[cg] = struct{}{} } diff --git a/pkg/sentry/kernel/fasync/BUILD b/pkg/sentry/kernel/fasync/BUILD index f855f038b..6224a0cbd 100644 --- a/pkg/sentry/kernel/fasync/BUILD +++ b/pkg/sentry/kernel/fasync/BUILD @@ -8,7 +8,6 @@ go_library( visibility = ["//:sandbox"], deps = [ "//pkg/abi/linux", - "//pkg/sentry/arch", "//pkg/sentry/fs", "//pkg/sentry/kernel", "//pkg/sentry/kernel/auth", diff --git a/pkg/sentry/kernel/fasync/fasync.go b/pkg/sentry/kernel/fasync/fasync.go index dbbbaeeb0..5d584dc45 100644 --- a/pkg/sentry/kernel/fasync/fasync.go +++ b/pkg/sentry/kernel/fasync/fasync.go @@ -17,7 +17,6 @@ package fasync import ( "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/fs" "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" @@ -125,9 +124,9 @@ func (a *FileAsync) Callback(e *waiter.Entry, mask waiter.EventMask) { if !permCheck { return } - signalInfo := &arch.SignalInfo{ + signalInfo := &linux.SignalInfo{ Signo: int32(linux.SIGIO), - Code: arch.SignalInfoKernel, + Code: linux.SI_KERNEL, } if a.signal != 0 { signalInfo.Signo = int32(a.signal) diff --git a/pkg/sentry/kernel/fd_table.go b/pkg/sentry/kernel/fd_table.go index 10885688c..62777faa8 100644 --- a/pkg/sentry/kernel/fd_table.go +++ b/pkg/sentry/kernel/fd_table.go @@ -154,9 +154,11 @@ func (f *FDTable) drop(ctx context.Context, file *fs.File) { // dropVFS2 drops the table reference. func (f *FDTable) dropVFS2(ctx context.Context, file *vfs.FileDescription) { // Release any POSIX lock possibly held by the FDTable. - err := file.UnlockPOSIX(ctx, f, lock.LockRange{0, lock.LockEOF}) - if err != nil && err != syserror.ENOLCK { - panic(fmt.Sprintf("UnlockPOSIX failed: %v", err)) + if file.SupportsLocks() { + err := file.UnlockPOSIX(ctx, f, lock.LockRange{0, lock.LockEOF}) + if err != nil && err != syserror.ENOLCK { + panic(fmt.Sprintf("UnlockPOSIX failed: %v", err)) + } } // Drop the table's reference. diff --git a/pkg/sentry/kernel/futex/BUILD b/pkg/sentry/kernel/futex/BUILD index a75686cf3..6c31e082c 100644 --- a/pkg/sentry/kernel/futex/BUILD +++ b/pkg/sentry/kernel/futex/BUILD @@ -8,7 +8,7 @@ go_template_instance( out = "atomicptr_bucket_unsafe.go", package = "futex", suffix = "Bucket", - template = "//pkg/sync:generic_atomicptr", + template = "//pkg/sync/atomicptr:generic_atomicptr", types = { "Value": "bucket", }, diff --git a/pkg/sentry/kernel/kernel.go b/pkg/sentry/kernel/kernel.go index e6e9da898..d537e608a 100644 --- a/pkg/sentry/kernel/kernel.go +++ b/pkg/sentry/kernel/kernel.go @@ -306,9 +306,6 @@ type InitKernelArgs struct { // FeatureSet is the emulated CPU feature set. FeatureSet *cpuid.FeatureSet - // Timekeeper manages time for all tasks in the system. - Timekeeper *Timekeeper - // RootUserNamespace is the root user namespace. RootUserNamespace *auth.UserNamespace @@ -348,29 +345,34 @@ type InitKernelArgs struct { PIDNamespace *PIDNamespace } +// SetTimekeeper sets Kernel.timekeeper. SetTimekeeper must be called before +// Init. +func (k *Kernel) SetTimekeeper(tk *Timekeeper) { + k.timekeeper = tk +} + // Init initialize the Kernel with no tasks. // // Callers must manually set Kernel.Platform and call Kernel.SetMemoryFile -// before calling Init. +// and Kernel.SetTimekeeper before calling Init. func (k *Kernel) Init(args InitKernelArgs) error { if args.FeatureSet == nil { - return fmt.Errorf("FeatureSet is nil") + return fmt.Errorf("args.FeatureSet is nil") } - if args.Timekeeper == nil { - return fmt.Errorf("Timekeeper is nil") + if k.timekeeper == nil { + return fmt.Errorf("timekeeper is nil") } - if args.Timekeeper.clocks == nil { + if k.timekeeper.clocks == nil { return fmt.Errorf("must call Timekeeper.SetClocks() before Kernel.Init()") } if args.RootUserNamespace == nil { - return fmt.Errorf("RootUserNamespace is nil") + return fmt.Errorf("args.RootUserNamespace is nil") } if args.ApplicationCores == 0 { - return fmt.Errorf("ApplicationCores is 0") + return fmt.Errorf("args.ApplicationCores is 0") } k.featureSet = args.FeatureSet - k.timekeeper = args.Timekeeper k.tasks = newTaskSet(args.PIDNamespace) k.rootUserNamespace = args.RootUserNamespace k.rootUTSNamespace = args.RootUTSNamespace @@ -395,8 +397,8 @@ func (k *Kernel) Init(args InitKernelArgs) error { } k.extraAuxv = args.ExtraAuxv k.vdso = args.Vdso - k.realtimeClock = &timekeeperClock{tk: args.Timekeeper, c: sentrytime.Realtime} - k.monotonicClock = &timekeeperClock{tk: args.Timekeeper, c: sentrytime.Monotonic} + k.realtimeClock = &timekeeperClock{tk: k.timekeeper, c: sentrytime.Realtime} + k.monotonicClock = &timekeeperClock{tk: k.timekeeper, c: sentrytime.Monotonic} k.futexes = futex.NewManager() k.netlinkPorts = port.New() k.ptraceExceptions = make(map[*Task]*Task) @@ -654,12 +656,12 @@ func (k *Kernel) invalidateUnsavableMappings(ctx context.Context) error { defer k.tasks.mu.RUnlock() for t := range k.tasks.Root.tids { // We can skip locking Task.mu here since the kernel is paused. - if mm := t.image.MemoryManager; mm != nil { - if _, ok := invalidated[mm]; !ok { - if err := mm.InvalidateUnsavable(ctx); err != nil { + if memMgr := t.image.MemoryManager; memMgr != nil { + if _, ok := invalidated[memMgr]; !ok { + if err := memMgr.InvalidateUnsavable(ctx); err != nil { return err } - invalidated[mm] = struct{}{} + invalidated[memMgr] = struct{}{} } } // I really wish we just had a sync.Map of all MMs... @@ -1339,7 +1341,7 @@ func (k *Kernel) Unpause() { // context is used only for debugging to describe how the signal was received. // // Preconditions: Kernel must have an init process. -func (k *Kernel) SendExternalSignal(info *arch.SignalInfo, context string) { +func (k *Kernel) SendExternalSignal(info *linux.SignalInfo, context string) { k.extMu.Lock() defer k.extMu.Unlock() k.sendExternalSignal(info, context) @@ -1347,7 +1349,7 @@ func (k *Kernel) SendExternalSignal(info *arch.SignalInfo, context string) { // SendExternalSignalThreadGroup injects a signal into an specific ThreadGroup. // This function doesn't skip signals like SendExternalSignal does. -func (k *Kernel) SendExternalSignalThreadGroup(tg *ThreadGroup, info *arch.SignalInfo) error { +func (k *Kernel) SendExternalSignalThreadGroup(tg *ThreadGroup, info *linux.SignalInfo) error { k.extMu.Lock() defer k.extMu.Unlock() return tg.SendSignal(info) @@ -1355,7 +1357,7 @@ func (k *Kernel) SendExternalSignalThreadGroup(tg *ThreadGroup, info *arch.Signa // SendContainerSignal sends the given signal to all processes inside the // namespace that match the given container ID. -func (k *Kernel) SendContainerSignal(cid string, info *arch.SignalInfo) error { +func (k *Kernel) SendContainerSignal(cid string, info *linux.SignalInfo) error { k.extMu.Lock() defer k.extMu.Unlock() k.tasks.mu.RLock() @@ -1553,22 +1555,23 @@ func (k *Kernel) SetSaveError(err error) { var _ tcpip.Clock = (*Kernel)(nil) -// NowNanoseconds implements tcpip.Clock.NowNanoseconds. -func (k *Kernel) NowNanoseconds() int64 { - now, err := k.timekeeper.GetTime(sentrytime.Realtime) +// Now implements tcpip.Clock.NowNanoseconds. +func (k *Kernel) Now() time.Time { + nsec, err := k.timekeeper.GetTime(sentrytime.Realtime) if err != nil { - panic("Kernel.NowNanoseconds: " + err.Error()) + panic("timekeeper.GetTime(sentrytime.Realtime): " + err.Error()) } - return now + return time.Unix(0, nsec) } // NowMonotonic implements tcpip.Clock.NowMonotonic. -func (k *Kernel) NowMonotonic() int64 { - now, err := k.timekeeper.GetTime(sentrytime.Monotonic) +func (k *Kernel) NowMonotonic() tcpip.MonotonicTime { + nsec, err := k.timekeeper.GetTime(sentrytime.Monotonic) if err != nil { - panic("Kernel.NowMonotonic: " + err.Error()) + panic("timekeeper.GetTime(sentrytime.Monotonic): " + err.Error()) } - return now + var mt tcpip.MonotonicTime + return mt.Add(time.Duration(nsec) * time.Nanosecond) } // AfterFunc implements tcpip.Clock.AfterFunc. @@ -1783,7 +1786,7 @@ func (k *Kernel) EmitUnimplementedEvent(ctx context.Context) { }) t := TaskFromContext(ctx) - k.unimplementedSyscallEmitter.Emit(&uspb.UnimplementedSyscall{ + _, _ = k.unimplementedSyscallEmitter.Emit(&uspb.UnimplementedSyscall{ Tid: int32(t.ThreadID()), Registers: t.Arch().StateData().Proto(), }) @@ -1858,7 +1861,9 @@ func (k *Kernel) PopulateNewCgroupHierarchy(root Cgroup) { return } t.mu.Lock() - t.enterCgroupLocked(root) + // A task can be in the cgroup if it has been created after the + // cgroup hierarchy was registered. + t.enterCgroupIfNotYetLocked(root) t.mu.Unlock() }) k.tasks.mu.RUnlock() @@ -1874,7 +1879,7 @@ func (k *Kernel) ReleaseCgroupHierarchy(hid uint32) { return } t.mu.Lock() - for cg, _ := range t.cgroups { + for cg := range t.cgroups { if cg.HierarchyID() == hid { t.leaveCgroupLocked(cg) } diff --git a/pkg/sentry/kernel/pending_signals.go b/pkg/sentry/kernel/pending_signals.go index 77a35b788..af455c434 100644 --- a/pkg/sentry/kernel/pending_signals.go +++ b/pkg/sentry/kernel/pending_signals.go @@ -17,7 +17,6 @@ package kernel import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/bits" - "gvisor.dev/gvisor/pkg/sentry/arch" ) const ( @@ -65,7 +64,7 @@ type pendingSignalQueue struct { type pendingSignal struct { // pendingSignalEntry links into a pendingSignalList. pendingSignalEntry - *arch.SignalInfo + *linux.SignalInfo // If timer is not nil, it is the IntervalTimer which sent this signal. timer *IntervalTimer @@ -75,7 +74,7 @@ type pendingSignal struct { // on failure (if the given signal's queue is full). // // Preconditions: info represents a valid signal. -func (p *pendingSignals) enqueue(info *arch.SignalInfo, timer *IntervalTimer) bool { +func (p *pendingSignals) enqueue(info *linux.SignalInfo, timer *IntervalTimer) bool { sig := linux.Signal(info.Signo) q := &p.signals[sig.Index()] if sig.IsStandard() { @@ -93,7 +92,7 @@ func (p *pendingSignals) enqueue(info *arch.SignalInfo, timer *IntervalTimer) bo // dequeue dequeues and returns any pending signal not masked by mask. If no // unmasked signals are pending, dequeue returns nil. -func (p *pendingSignals) dequeue(mask linux.SignalSet) *arch.SignalInfo { +func (p *pendingSignals) dequeue(mask linux.SignalSet) *linux.SignalInfo { // "Real-time signals are delivered in a guaranteed order. Multiple // real-time signals of the same type are delivered in the order they were // sent. If different real-time signals are sent to a process, they are @@ -111,7 +110,7 @@ func (p *pendingSignals) dequeue(mask linux.SignalSet) *arch.SignalInfo { return p.dequeueSpecific(linux.Signal(lowestPendingUnblockedBit + 1)) } -func (p *pendingSignals) dequeueSpecific(sig linux.Signal) *arch.SignalInfo { +func (p *pendingSignals) dequeueSpecific(sig linux.Signal) *linux.SignalInfo { q := &p.signals[sig.Index()] ps := q.pendingSignalList.Front() if ps == nil { diff --git a/pkg/sentry/kernel/pending_signals_state.go b/pkg/sentry/kernel/pending_signals_state.go index ca8b4e164..e77f1a254 100644 --- a/pkg/sentry/kernel/pending_signals_state.go +++ b/pkg/sentry/kernel/pending_signals_state.go @@ -14,13 +14,11 @@ package kernel -import ( - "gvisor.dev/gvisor/pkg/sentry/arch" -) +import "gvisor.dev/gvisor/pkg/abi/linux" // +stateify savable type savedPendingSignal struct { - si *arch.SignalInfo + si *linux.SignalInfo timer *IntervalTimer } diff --git a/pkg/sentry/kernel/pipe/pipe_util.go b/pkg/sentry/kernel/pipe/pipe_util.go index 2d89b9ccd..3fa5d1d2f 100644 --- a/pkg/sentry/kernel/pipe/pipe_util.go +++ b/pkg/sentry/kernel/pipe/pipe_util.go @@ -86,6 +86,12 @@ func (p *Pipe) Write(ctx context.Context, src usermem.IOSequence) (int64, error) if n > 0 { p.Notify(waiter.ReadableEvents) } + if err == unix.EPIPE { + // If we are returning EPIPE send SIGPIPE to the task. + if sendSig := linux.SignalNoInfoFuncFromContext(ctx); sendSig != nil { + sendSig(linux.SIGPIPE) + } + } return n, err } @@ -129,7 +135,7 @@ func (p *Pipe) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArgume v = math.MaxInt32 // Silently truncate. } // Copy result to userspace. - iocc := primitive.IOCopyContext{ + iocc := usermem.IOCopyContext{ IO: io, Ctx: ctx, Opts: usermem.IOOpts{ diff --git a/pkg/sentry/kernel/posixtimer.go b/pkg/sentry/kernel/posixtimer.go index 2e861a5a8..d801a3d83 100644 --- a/pkg/sentry/kernel/posixtimer.go +++ b/pkg/sentry/kernel/posixtimer.go @@ -18,7 +18,6 @@ import ( "math" "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/sentry/arch" ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" "gvisor.dev/gvisor/pkg/syserror" ) @@ -97,7 +96,7 @@ func (it *IntervalTimer) ResumeTimer() { } // Preconditions: it.target's signal mutex must be locked. -func (it *IntervalTimer) updateDequeuedSignalLocked(si *arch.SignalInfo) { +func (it *IntervalTimer) updateDequeuedSignalLocked(si *linux.SignalInfo) { it.sigpending = false if it.sigorphan { return @@ -138,9 +137,9 @@ func (it *IntervalTimer) Notify(exp uint64, setting ktime.Setting) (ktime.Settin it.sigpending = true it.sigorphan = false it.overrunCur += exp - 1 - si := &arch.SignalInfo{ + si := &linux.SignalInfo{ Signo: int32(it.signo), - Code: arch.SignalInfoTimer, + Code: linux.SI_TIMER, } si.SetTimerID(it.id) si.SetSigval(it.sigval) diff --git a/pkg/sentry/kernel/ptrace.go b/pkg/sentry/kernel/ptrace.go index 57c7659e7..a6287fd6a 100644 --- a/pkg/sentry/kernel/ptrace.go +++ b/pkg/sentry/kernel/ptrace.go @@ -21,7 +21,6 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/marshal/primitive" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/mm" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/usermem" @@ -394,7 +393,7 @@ func (t *Task) ptraceTrapLocked(code int32) { t.trapStopPending = false t.tg.signalHandlers.mu.Unlock() t.ptraceCode = code - t.ptraceSiginfo = &arch.SignalInfo{ + t.ptraceSiginfo = &linux.SignalInfo{ Signo: int32(linux.SIGTRAP), Code: code, } @@ -402,7 +401,7 @@ func (t *Task) ptraceTrapLocked(code int32) { t.ptraceSiginfo.SetUID(int32(t.Credentials().RealKUID.In(t.UserNamespace()).OrOverflow())) if t.beginPtraceStopLocked() { tracer := t.Tracer() - tracer.signalStop(t, arch.CLD_TRAPPED, int32(linux.SIGTRAP)) + tracer.signalStop(t, linux.CLD_TRAPPED, int32(linux.SIGTRAP)) tracer.tg.eventQueue.Notify(EventTraceeStop) } } @@ -542,9 +541,9 @@ func (t *Task) ptraceAttach(target *Task, seize bool, opts uintptr) error { // "Unlike PTRACE_ATTACH, PTRACE_SEIZE does not stop the process." - // ptrace(2) if !seize { - target.sendSignalLocked(&arch.SignalInfo{ + target.sendSignalLocked(&linux.SignalInfo{ Signo: int32(linux.SIGSTOP), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, }, false /* group */) } // Undocumented Linux feature: If the tracee is already group-stopped (and @@ -586,7 +585,7 @@ func (t *Task) exitPtrace() { for target := range t.ptraceTracees { if target.ptraceOpts.ExitKill { target.tg.signalHandlers.mu.Lock() - target.sendSignalLocked(&arch.SignalInfo{ + target.sendSignalLocked(&linux.SignalInfo{ Signo: int32(linux.SIGKILL), }, false /* group */) target.tg.signalHandlers.mu.Unlock() @@ -652,7 +651,7 @@ func (t *Task) forgetTracerLocked() { // Preconditions: // * The signal mutex must be locked. // * The caller must be running on the task goroutine. -func (t *Task) ptraceSignalLocked(info *arch.SignalInfo) bool { +func (t *Task) ptraceSignalLocked(info *linux.SignalInfo) bool { if linux.Signal(info.Signo) == linux.SIGKILL { return false } @@ -678,7 +677,7 @@ func (t *Task) ptraceSignalLocked(info *arch.SignalInfo) bool { t.ptraceSiginfo = info t.Debugf("Entering signal-delivery-stop for signal %d", info.Signo) if t.beginPtraceStopLocked() { - tracer.signalStop(t, arch.CLD_TRAPPED, info.Signo) + tracer.signalStop(t, linux.CLD_TRAPPED, info.Signo) tracer.tg.eventQueue.Notify(EventTraceeStop) } return true @@ -829,7 +828,7 @@ func (t *Task) ptraceClone(kind ptraceCloneKind, child *Task, opts *CloneOptions if child.ptraceSeized { child.trapStopPending = true } else { - child.pendingSignals.enqueue(&arch.SignalInfo{ + child.pendingSignals.enqueue(&linux.SignalInfo{ Signo: int32(linux.SIGSTOP), }, nil) } @@ -893,9 +892,9 @@ func (t *Task) ptraceExec(oldTID ThreadID) { } t.tg.signalHandlers.mu.Lock() defer t.tg.signalHandlers.mu.Unlock() - t.sendSignalLocked(&arch.SignalInfo{ + t.sendSignalLocked(&linux.SignalInfo{ Signo: int32(linux.SIGTRAP), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, }, false /* group */) } @@ -1228,7 +1227,7 @@ func (t *Task) Ptrace(req int64, pid ThreadID, addr, data hostarch.Addr) error { return err case linux.PTRACE_SETSIGINFO: - var info arch.SignalInfo + var info linux.SignalInfo if _, err := info.CopyIn(t, data); err != nil { return err } diff --git a/pkg/sentry/kernel/seccomp.go b/pkg/sentry/kernel/seccomp.go index a95e174a2..54ca43c2e 100644 --- a/pkg/sentry/kernel/seccomp.go +++ b/pkg/sentry/kernel/seccomp.go @@ -39,11 +39,11 @@ func dataAsBPFInput(t *Task, d *linux.SeccompData) bpf.Input { } } -func seccompSiginfo(t *Task, errno, sysno int32, ip hostarch.Addr) *arch.SignalInfo { - si := &arch.SignalInfo{ +func seccompSiginfo(t *Task, errno, sysno int32, ip hostarch.Addr) *linux.SignalInfo { + si := &linux.SignalInfo{ Signo: int32(linux.SIGSYS), Errno: errno, - Code: arch.SYS_SECCOMP, + Code: linux.SYS_SECCOMP, } si.SetCallAddr(uint64(ip)) si.SetSyscall(sysno) diff --git a/pkg/sentry/kernel/semaphore/semaphore.go b/pkg/sentry/kernel/semaphore/semaphore.go index fe2ab1662..47bb66b42 100644 --- a/pkg/sentry/kernel/semaphore/semaphore.go +++ b/pkg/sentry/kernel/semaphore/semaphore.go @@ -35,10 +35,10 @@ const ( // Maximum number of semaphore sets. setsMax = linux.SEMMNI - // Maximum number of semaphroes in a semaphore set. + // Maximum number of semaphores in a semaphore set. semsMax = linux.SEMMSL - // Maximum number of semaphores in all semaphroe sets. + // Maximum number of semaphores in all semaphore sets. semsTotalMax = linux.SEMMNS ) @@ -171,10 +171,10 @@ func (r *Registry) FindOrCreate(ctx context.Context, key, nsems int32, mode linu // Map semaphores and map indexes in a registry are of the same size, // check map semaphores only here for the system limit. if len(r.semaphores) >= setsMax { - return nil, syserror.EINVAL + return nil, syserror.ENOSPC } if r.totalSems() > int(semsTotalMax-nsems) { - return nil, syserror.EINVAL + return nil, syserror.ENOSPC } // Finally create a new set. @@ -220,7 +220,7 @@ func (r *Registry) HighestIndex() int32 { defer r.mu.Unlock() // By default, highest used index is 0 even though - // there is no semaphroe set. + // there is no semaphore set. var highestIndex int32 for index := range r.indexes { if index > highestIndex { @@ -702,7 +702,9 @@ func (s *Set) checkPerms(creds *auth.Credentials, reqPerms fs.PermMask) bool { return s.checkCapability(creds) } -// destroy destroys the set. Caller must hold 's.mu'. +// destroy destroys the set. +// +// Preconditions: Caller must hold 's.mu'. func (s *Set) destroy() { // Notify all waiters. They will fail on the next attempt to execute // operations and return error. diff --git a/pkg/sentry/kernel/sessions.go b/pkg/sentry/kernel/sessions.go index 0cd9e2533..ca9076406 100644 --- a/pkg/sentry/kernel/sessions.go +++ b/pkg/sentry/kernel/sessions.go @@ -16,7 +16,6 @@ package kernel import ( "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/syserror" ) @@ -233,7 +232,7 @@ func (pg *ProcessGroup) Session() *Session { // SendSignal sends a signal to all processes inside the process group. It is // analagous to kernel/signal.c:kill_pgrp. -func (pg *ProcessGroup) SendSignal(info *arch.SignalInfo) error { +func (pg *ProcessGroup) SendSignal(info *linux.SignalInfo) error { tasks := pg.originator.TaskSet() tasks.mu.RLock() defer tasks.mu.RUnlock() diff --git a/pkg/sentry/kernel/signal.go b/pkg/sentry/kernel/signal.go index 2488ae7d5..e08474d25 100644 --- a/pkg/sentry/kernel/signal.go +++ b/pkg/sentry/kernel/signal.go @@ -19,7 +19,6 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/log" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/platform" ) @@ -36,7 +35,7 @@ const SignalPanic = linux.SIGUSR2 // context is used only for debugging to differentiate these cases. // // Preconditions: Kernel must have an init process. -func (k *Kernel) sendExternalSignal(info *arch.SignalInfo, context string) { +func (k *Kernel) sendExternalSignal(info *linux.SignalInfo, context string) { switch linux.Signal(info.Signo) { case linux.SIGURG: // Sent by the Go 1.14+ runtime for asynchronous goroutine preemption. @@ -60,18 +59,18 @@ func (k *Kernel) sendExternalSignal(info *arch.SignalInfo, context string) { } // SignalInfoPriv returns a SignalInfo equivalent to Linux's SEND_SIG_PRIV. -func SignalInfoPriv(sig linux.Signal) *arch.SignalInfo { - return &arch.SignalInfo{ +func SignalInfoPriv(sig linux.Signal) *linux.SignalInfo { + return &linux.SignalInfo{ Signo: int32(sig), - Code: arch.SignalInfoKernel, + Code: linux.SI_KERNEL, } } // SignalInfoNoInfo returns a SignalInfo equivalent to Linux's SEND_SIG_NOINFO. -func SignalInfoNoInfo(sig linux.Signal, sender, receiver *Task) *arch.SignalInfo { - info := &arch.SignalInfo{ +func SignalInfoNoInfo(sig linux.Signal, sender, receiver *Task) *linux.SignalInfo { + info := &linux.SignalInfo{ Signo: int32(sig), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, } info.SetPID(int32(receiver.tg.pidns.IDOfThreadGroup(sender.tg))) info.SetUID(int32(sender.Credentials().RealKUID.In(receiver.UserNamespace()).OrOverflow())) diff --git a/pkg/sentry/kernel/signal_handlers.go b/pkg/sentry/kernel/signal_handlers.go index 768fda220..147cc41bb 100644 --- a/pkg/sentry/kernel/signal_handlers.go +++ b/pkg/sentry/kernel/signal_handlers.go @@ -16,7 +16,6 @@ package kernel import ( "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sync" ) @@ -30,14 +29,14 @@ type SignalHandlers struct { mu sync.Mutex `state:"nosave"` // actions is the action to be taken upon receiving each signal. - actions map[linux.Signal]arch.SignalAct + actions map[linux.Signal]linux.SigAction } // NewSignalHandlers returns a new SignalHandlers specifying all default // actions. func NewSignalHandlers() *SignalHandlers { return &SignalHandlers{ - actions: make(map[linux.Signal]arch.SignalAct), + actions: make(map[linux.Signal]linux.SigAction), } } @@ -59,9 +58,9 @@ func (sh *SignalHandlers) CopyForExec() *SignalHandlers { sh.mu.Lock() defer sh.mu.Unlock() for sig, act := range sh.actions { - if act.Handler == arch.SignalActIgnore { - sh2.actions[sig] = arch.SignalAct{ - Handler: arch.SignalActIgnore, + if act.Handler == linux.SIG_IGN { + sh2.actions[sig] = linux.SigAction{ + Handler: linux.SIG_IGN, } } } @@ -73,15 +72,15 @@ func (sh *SignalHandlers) IsIgnored(sig linux.Signal) bool { sh.mu.Lock() defer sh.mu.Unlock() sa, ok := sh.actions[sig] - return ok && sa.Handler == arch.SignalActIgnore + return ok && sa.Handler == linux.SIG_IGN } // dequeueActionLocked returns the SignalAct that should be used to handle sig. // // Preconditions: sh.mu must be locked. -func (sh *SignalHandlers) dequeueAction(sig linux.Signal) arch.SignalAct { +func (sh *SignalHandlers) dequeueAction(sig linux.Signal) linux.SigAction { act := sh.actions[sig] - if act.IsResetHandler() { + if act.Flags&linux.SA_RESETHAND != 0 { delete(sh.actions, sig) } return act diff --git a/pkg/sentry/kernel/task.go b/pkg/sentry/kernel/task.go index be1371855..2e3b4488a 100644 --- a/pkg/sentry/kernel/task.go +++ b/pkg/sentry/kernel/task.go @@ -22,7 +22,6 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/bpf" "gvisor.dev/gvisor/pkg/hostarch" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/fs" "gvisor.dev/gvisor/pkg/sentry/inet" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" @@ -151,7 +150,7 @@ type Task struct { // which the SA_ONSTACK flag is set. // // signalStack is exclusive to the task goroutine. - signalStack arch.SignalStack + signalStack linux.SignalStack // signalQueue is a set of registered waiters for signal-related events. // @@ -395,7 +394,7 @@ type Task struct { // ptraceSiginfo is analogous to Linux's task_struct::last_siginfo. // // ptraceSiginfo is protected by the TaskSet mutex. - ptraceSiginfo *arch.SignalInfo + ptraceSiginfo *linux.SignalInfo // ptraceEventMsg is the value set by PTRACE_EVENT stops and returned to // the tracer by ptrace(PTRACE_GETEVENTMSG). @@ -853,15 +852,13 @@ func (t *Task) SetOOMScoreAdj(adj int32) error { return nil } -// UID returns t's uid. -// TODO(gvisor.dev/issue/170): This method is not namespaced yet. -func (t *Task) UID() uint32 { +// KUID returns t's kuid. +func (t *Task) KUID() uint32 { return uint32(t.Credentials().EffectiveKUID) } -// GID returns t's gid. -// TODO(gvisor.dev/issue/170): This method is not namespaced yet. -func (t *Task) GID() uint32 { +// KGID returns t's kgid. +func (t *Task) KGID() uint32 { return uint32(t.Credentials().EffectiveKGID) } diff --git a/pkg/sentry/kernel/task_cgroup.go b/pkg/sentry/kernel/task_cgroup.go index 25d2504fa..7c138e80f 100644 --- a/pkg/sentry/kernel/task_cgroup.go +++ b/pkg/sentry/kernel/task_cgroup.go @@ -85,6 +85,14 @@ func (t *Task) enterCgroupLocked(c Cgroup) { c.Enter(t) } +// +checklocks:t.mu +func (t *Task) enterCgroupIfNotYetLocked(c Cgroup) { + if _, ok := t.cgroups[c]; ok { + return + } + t.enterCgroupLocked(c) +} + // LeaveCgroups removes t out from all its cgroups. func (t *Task) LeaveCgroups() { t.mu.Lock() diff --git a/pkg/sentry/kernel/task_context.go b/pkg/sentry/kernel/task_context.go index 70b0699dc..c82d9e82b 100644 --- a/pkg/sentry/kernel/task_context.go +++ b/pkg/sentry/kernel/task_context.go @@ -17,6 +17,7 @@ package kernel import ( "time" + "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/log" "gvisor.dev/gvisor/pkg/sentry/fs" @@ -113,6 +114,10 @@ func (t *Task) contextValue(key interface{}, isTaskGoroutine bool) interface{} { return t.k.RealtimeClock() case limits.CtxLimits: return t.tg.limits + case linux.CtxSignalNoInfoFunc: + return func(sig linux.Signal) error { + return t.SendSignal(SignalInfoNoInfo(sig, t, t)) + } case pgalloc.CtxMemoryFile: return t.k.mf case pgalloc.CtxMemoryFileProvider: diff --git a/pkg/sentry/kernel/task_exec.go b/pkg/sentry/kernel/task_exec.go index d9897e802..cf8571262 100644 --- a/pkg/sentry/kernel/task_exec.go +++ b/pkg/sentry/kernel/task_exec.go @@ -66,7 +66,6 @@ package kernel import ( "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/fs" "gvisor.dev/gvisor/pkg/sentry/mm" "gvisor.dev/gvisor/pkg/sentry/vfs" @@ -181,7 +180,7 @@ func (r *runSyscallAfterExecStop) execute(t *Task) taskRunState { t.tg.signalHandlers = t.tg.signalHandlers.CopyForExec() t.endStopCond.L = &t.tg.signalHandlers.mu // "Any alternate signal stack is not preserved (sigaltstack(2))." - execve(2) - t.signalStack = arch.SignalStack{Flags: arch.SignalStackFlagDisable} + t.signalStack = linux.SignalStack{Flags: linux.SS_DISABLE} // "The termination signal is reset to SIGCHLD (see clone(2))." t.tg.terminationSignal = linux.SIGCHLD // execed indicates that the process can no longer join a process group diff --git a/pkg/sentry/kernel/task_exit.go b/pkg/sentry/kernel/task_exit.go index b1af1a7ef..d115b8783 100644 --- a/pkg/sentry/kernel/task_exit.go +++ b/pkg/sentry/kernel/task_exit.go @@ -28,9 +28,9 @@ import ( "errors" "fmt" "strconv" + "strings" "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/waiter" @@ -50,6 +50,23 @@ type ExitStatus struct { Signo int } +func (es ExitStatus) String() string { + var b strings.Builder + if code := es.Code; code != 0 { + if b.Len() != 0 { + b.WriteByte(' ') + } + _, _ = fmt.Fprintf(&b, "Code=%d", code) + } + if signal := es.Signo; signal != 0 { + if b.Len() != 0 { + b.WriteByte(' ') + } + _, _ = fmt.Fprintf(&b, "Signal=%d", signal) + } + return b.String() +} + // Signaled returns true if the ExitStatus indicates that the exiting task or // thread group was killed by a signal. func (es ExitStatus) Signaled() bool { @@ -122,12 +139,12 @@ func (t *Task) killLocked() { if t.stop != nil && t.stop.Killable() { t.endInternalStopLocked() } - t.pendingSignals.enqueue(&arch.SignalInfo{ + t.pendingSignals.enqueue(&linux.SignalInfo{ Signo: int32(linux.SIGKILL), // Linux just sets SIGKILL in the pending signal bitmask without // enqueueing an actual siginfo, such that // kernel/signal.c:collect_signal() initializes si_code to SI_USER. - Code: arch.SignalInfoUser, + Code: linux.SI_USER, }, nil) t.interrupt() } @@ -332,7 +349,7 @@ func (t *Task) exitThreadGroup() bool { // signalStop must be called with t's signal mutex unlocked. t.tg.signalHandlers.mu.Unlock() if notifyParent && t.tg.leader.parent != nil { - t.tg.leader.parent.signalStop(t, arch.CLD_STOPPED, int32(sig)) + t.tg.leader.parent.signalStop(t, linux.CLD_STOPPED, int32(sig)) t.tg.leader.parent.tg.eventQueue.Notify(EventChildGroupStop) } return last @@ -353,7 +370,7 @@ func (t *Task) exitChildren() { continue } other.signalHandlers.mu.Lock() - other.leader.sendSignalLocked(&arch.SignalInfo{ + other.leader.sendSignalLocked(&linux.SignalInfo{ Signo: int32(linux.SIGKILL), }, true /* group */) other.signalHandlers.mu.Unlock() @@ -368,9 +385,9 @@ func (t *Task) exitChildren() { // wait for a parent to reap them.) for c := range t.children { if sig := c.ParentDeathSignal(); sig != 0 { - siginfo := &arch.SignalInfo{ + siginfo := &linux.SignalInfo{ Signo: int32(sig), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, } siginfo.SetPID(int32(c.tg.pidns.tids[t])) siginfo.SetUID(int32(t.Credentials().RealKUID.In(c.UserNamespace()).OrOverflow())) @@ -652,10 +669,10 @@ func (t *Task) exitNotifyLocked(fromPtraceDetach bool) { t.parent.tg.signalHandlers.mu.Lock() if t.tg.terminationSignal == linux.SIGCHLD || fromPtraceDetach { if act, ok := t.parent.tg.signalHandlers.actions[linux.SIGCHLD]; ok { - if act.Handler == arch.SignalActIgnore { + if act.Handler == linux.SIG_IGN { t.exitParentAcked = true signalParent = false - } else if act.Flags&arch.SignalFlagNoCldWait != 0 { + } else if act.Flags&linux.SA_NOCLDWAIT != 0 { t.exitParentAcked = true } } @@ -705,17 +722,17 @@ func (t *Task) exitNotifyLocked(fromPtraceDetach bool) { } // Preconditions: The TaskSet mutex must be locked. -func (t *Task) exitNotificationSignal(sig linux.Signal, receiver *Task) *arch.SignalInfo { - info := &arch.SignalInfo{ +func (t *Task) exitNotificationSignal(sig linux.Signal, receiver *Task) *linux.SignalInfo { + info := &linux.SignalInfo{ Signo: int32(sig), } info.SetPID(int32(receiver.tg.pidns.tids[t])) info.SetUID(int32(t.Credentials().RealKUID.In(receiver.UserNamespace()).OrOverflow())) if t.exitStatus.Signaled() { - info.Code = arch.CLD_KILLED + info.Code = linux.CLD_KILLED info.SetStatus(int32(t.exitStatus.Signo)) } else { - info.Code = arch.CLD_EXITED + info.Code = linux.CLD_EXITED info.SetStatus(int32(t.exitStatus.Code)) } // TODO(b/72102453): Set utime, stime. diff --git a/pkg/sentry/kernel/task_sched.go b/pkg/sentry/kernel/task_sched.go index 9ba5f8d78..f142feab4 100644 --- a/pkg/sentry/kernel/task_sched.go +++ b/pkg/sentry/kernel/task_sched.go @@ -536,7 +536,7 @@ func (tg *ThreadGroup) updateCPUTimersEnabledLocked() { // appropriate for /proc/[pid]/status. func (t *Task) StateStatus() string { switch s := t.TaskGoroutineSchedInfo().State; s { - case TaskGoroutineNonexistent: + case TaskGoroutineNonexistent, TaskGoroutineRunningSys: t.tg.pidns.owner.mu.RLock() defer t.tg.pidns.owner.mu.RUnlock() switch t.exitState { @@ -546,16 +546,16 @@ func (t *Task) StateStatus() string { return "X (dead)" default: // The task goroutine can't exit before passing through - // runExitNotify, so this indicates that the task has been created, - // but the task goroutine hasn't yet started. The Linux equivalent - // is struct task_struct::state == TASK_NEW + // runExitNotify, so if s == TaskGoroutineNonexistent, the task has + // been created but the task goroutine hasn't yet started. The + // Linux equivalent is struct task_struct::state == TASK_NEW // (kernel/fork.c:copy_process() => // kernel/sched/core.c:sched_fork()), but the TASK_NEW bit is // masked out by TASK_REPORT for /proc/[pid]/status, leaving only // TASK_RUNNING. return "R (running)" } - case TaskGoroutineRunningSys, TaskGoroutineRunningApp: + case TaskGoroutineRunningApp: return "R (running)" case TaskGoroutineBlockedInterruptible: return "S (sleeping)" diff --git a/pkg/sentry/kernel/task_signals.go b/pkg/sentry/kernel/task_signals.go index c2b9fc08f..8ca61ed48 100644 --- a/pkg/sentry/kernel/task_signals.go +++ b/pkg/sentry/kernel/task_signals.go @@ -86,7 +86,7 @@ var defaultActions = map[linux.Signal]SignalAction{ } // computeAction figures out what to do given a signal number -// and an arch.SignalAct. SIGSTOP always results in a SignalActionStop, +// and an linux.SigAction. SIGSTOP always results in a SignalActionStop, // and SIGKILL always results in a SignalActionTerm. // Signal 0 is always ignored as many programs use it for various internal functions // and don't expect it to do anything. @@ -97,7 +97,7 @@ var defaultActions = map[linux.Signal]SignalAction{ // 0, the default action is taken; // 1, the signal is ignored; // anything else, the function returns SignalActionHandler. -func computeAction(sig linux.Signal, act arch.SignalAct) SignalAction { +func computeAction(sig linux.Signal, act linux.SigAction) SignalAction { switch sig { case linux.SIGSTOP: return SignalActionStop @@ -108,9 +108,9 @@ func computeAction(sig linux.Signal, act arch.SignalAct) SignalAction { } switch act.Handler { - case arch.SignalActDefault: + case linux.SIG_DFL: return defaultActions[sig] - case arch.SignalActIgnore: + case linux.SIG_IGN: return SignalActionIgnore default: return SignalActionHandler @@ -127,7 +127,7 @@ var StopSignals = linux.MakeSignalSet(linux.SIGSTOP, linux.SIGTSTP, linux.SIGTTI // If there are no pending unmasked signals, dequeueSignalLocked returns nil. // // Preconditions: t.tg.signalHandlers.mu must be locked. -func (t *Task) dequeueSignalLocked(mask linux.SignalSet) *arch.SignalInfo { +func (t *Task) dequeueSignalLocked(mask linux.SignalSet) *linux.SignalInfo { if info := t.pendingSignals.dequeue(mask); info != nil { return info } @@ -155,7 +155,7 @@ func (t *Task) PendingSignals() linux.SignalSet { } // deliverSignal delivers the given signal and returns the following run state. -func (t *Task) deliverSignal(info *arch.SignalInfo, act arch.SignalAct) taskRunState { +func (t *Task) deliverSignal(info *linux.SignalInfo, act linux.SigAction) taskRunState { sigact := computeAction(linux.Signal(info.Signo), act) if t.haveSyscallReturn { @@ -172,7 +172,7 @@ func (t *Task) deliverSignal(info *arch.SignalInfo, act arch.SignalAct) taskRunS fallthrough case sre == syserror.ERESTART_RESTARTBLOCK: fallthrough - case (sre == syserror.ERESTARTSYS && !act.IsRestart()): + case (sre == syserror.ERESTARTSYS && act.Flags&linux.SA_RESTART == 0): t.Debugf("Not restarting syscall %d after errno %d: interrupted by signal %d", t.Arch().SyscallNo(), sre, info.Signo) t.Arch().SetReturn(uintptr(-ExtractErrno(syserror.EINTR, -1))) default: @@ -236,7 +236,7 @@ func (t *Task) deliverSignal(info *arch.SignalInfo, act arch.SignalAct) taskRunS // deliverSignalToHandler changes the task's userspace state to enter the given // user-configured handler for the given signal. -func (t *Task) deliverSignalToHandler(info *arch.SignalInfo, act arch.SignalAct) error { +func (t *Task) deliverSignalToHandler(info *linux.SignalInfo, act linux.SigAction) error { // Signal delivery to an application handler interrupts restartable // sequences. t.rseqInterrupt() @@ -248,8 +248,8 @@ func (t *Task) deliverSignalToHandler(info *arch.SignalInfo, act arch.SignalAct) // N.B. This is a *copy* of the alternate stack that the user's signal // handler expects to see in its ucontext (even if it's not in use). alt := t.signalStack - if act.IsOnStack() && alt.IsEnabled() { - alt.SetOnStack() + if act.Flags&linux.SA_ONSTACK != 0 && alt.IsEnabled() { + alt.Flags |= linux.SS_ONSTACK if !alt.Contains(sp) { sp = hostarch.Addr(alt.Top()) } @@ -289,7 +289,7 @@ func (t *Task) deliverSignalToHandler(info *arch.SignalInfo, act arch.SignalAct) // Add our signal mask. newMask := t.signalMask | act.Mask - if !act.IsNoDefer() { + if act.Flags&linux.SA_NODEFER == 0 { newMask |= linux.SignalSetOf(linux.Signal(info.Signo)) } t.SetSignalMask(newMask) @@ -326,7 +326,7 @@ func (t *Task) SignalReturn(rt bool) (*SyscallControl, error) { // Preconditions: // * The caller must be running on the task goroutine. // * t.exitState < TaskExitZombie. -func (t *Task) Sigtimedwait(set linux.SignalSet, timeout time.Duration) (*arch.SignalInfo, error) { +func (t *Task) Sigtimedwait(set linux.SignalSet, timeout time.Duration) (*linux.SignalInfo, error) { // set is the set of signals we're interested in; invert it to get the set // of signals to block. mask := ^(set &^ UnblockableSignals) @@ -373,7 +373,7 @@ func (t *Task) Sigtimedwait(set linux.SignalSet, timeout time.Duration) (*arch.S // syserror.EINVAL - The signal is not valid. // syserror.EAGAIN - THe signal is realtime, and cannot be queued. // -func (t *Task) SendSignal(info *arch.SignalInfo) error { +func (t *Task) SendSignal(info *linux.SignalInfo) error { t.tg.pidns.owner.mu.RLock() defer t.tg.pidns.owner.mu.RUnlock() t.tg.signalHandlers.mu.Lock() @@ -382,7 +382,7 @@ func (t *Task) SendSignal(info *arch.SignalInfo) error { } // SendGroupSignal sends the given signal to t's thread group. -func (t *Task) SendGroupSignal(info *arch.SignalInfo) error { +func (t *Task) SendGroupSignal(info *linux.SignalInfo) error { t.tg.pidns.owner.mu.RLock() defer t.tg.pidns.owner.mu.RUnlock() t.tg.signalHandlers.mu.Lock() @@ -392,7 +392,7 @@ func (t *Task) SendGroupSignal(info *arch.SignalInfo) error { // SendSignal sends the given signal to tg, using tg's leader to determine if // the signal is blocked. -func (tg *ThreadGroup) SendSignal(info *arch.SignalInfo) error { +func (tg *ThreadGroup) SendSignal(info *linux.SignalInfo) error { tg.pidns.owner.mu.RLock() defer tg.pidns.owner.mu.RUnlock() tg.signalHandlers.mu.Lock() @@ -400,11 +400,11 @@ func (tg *ThreadGroup) SendSignal(info *arch.SignalInfo) error { return tg.leader.sendSignalLocked(info, true /* group */) } -func (t *Task) sendSignalLocked(info *arch.SignalInfo, group bool) error { +func (t *Task) sendSignalLocked(info *linux.SignalInfo, group bool) error { return t.sendSignalTimerLocked(info, group, nil) } -func (t *Task) sendSignalTimerLocked(info *arch.SignalInfo, group bool, timer *IntervalTimer) error { +func (t *Task) sendSignalTimerLocked(info *linux.SignalInfo, group bool, timer *IntervalTimer) error { if t.exitState == TaskExitDead { return syserror.ESRCH } @@ -572,9 +572,9 @@ func (t *Task) forceSignal(sig linux.Signal, unconditional bool) { func (t *Task) forceSignalLocked(sig linux.Signal, unconditional bool) { blocked := linux.SignalSetOf(sig)&t.signalMask != 0 act := t.tg.signalHandlers.actions[sig] - ignored := act.Handler == arch.SignalActIgnore + ignored := act.Handler == linux.SIG_IGN if blocked || ignored || unconditional { - act.Handler = arch.SignalActDefault + act.Handler = linux.SIG_DFL t.tg.signalHandlers.actions[sig] = act if blocked { t.setSignalMaskLocked(t.signalMask &^ linux.SignalSetOf(sig)) @@ -641,17 +641,17 @@ func (t *Task) SetSavedSignalMask(mask linux.SignalSet) { } // SignalStack returns the task-private signal stack. -func (t *Task) SignalStack() arch.SignalStack { +func (t *Task) SignalStack() linux.SignalStack { t.p.PullFullState(t.MemoryManager().AddressSpace(), t.Arch()) alt := t.signalStack if t.onSignalStack(alt) { - alt.Flags |= arch.SignalStackFlagOnStack + alt.Flags |= linux.SS_ONSTACK } return alt } // onSignalStack returns true if the task is executing on the given signal stack. -func (t *Task) onSignalStack(alt arch.SignalStack) bool { +func (t *Task) onSignalStack(alt linux.SignalStack) bool { sp := hostarch.Addr(t.Arch().Stack()) return alt.Contains(sp) } @@ -661,30 +661,30 @@ func (t *Task) onSignalStack(alt arch.SignalStack) bool { // This value may not be changed if the task is currently executing on the // signal stack, i.e. if t.onSignalStack returns true. In this case, this // function will return false. Otherwise, true is returned. -func (t *Task) SetSignalStack(alt arch.SignalStack) bool { +func (t *Task) SetSignalStack(alt linux.SignalStack) bool { // Check that we're not executing on the stack. if t.onSignalStack(t.signalStack) { return false } - if alt.Flags&arch.SignalStackFlagDisable != 0 { + if alt.Flags&linux.SS_DISABLE != 0 { // Don't record anything beyond the flags. - t.signalStack = arch.SignalStack{ - Flags: arch.SignalStackFlagDisable, + t.signalStack = linux.SignalStack{ + Flags: linux.SS_DISABLE, } } else { // Mask out irrelevant parts: only disable matters. - alt.Flags &= arch.SignalStackFlagDisable + alt.Flags &= linux.SS_DISABLE t.signalStack = alt } return true } -// SetSignalAct atomically sets the thread group's signal action for signal sig +// SetSigAction atomically sets the thread group's signal action for signal sig // to *actptr (if actptr is not nil) and returns the old signal action. -func (tg *ThreadGroup) SetSignalAct(sig linux.Signal, actptr *arch.SignalAct) (arch.SignalAct, error) { +func (tg *ThreadGroup) SetSigAction(sig linux.Signal, actptr *linux.SigAction) (linux.SigAction, error) { if !sig.IsValid() { - return arch.SignalAct{}, syserror.EINVAL + return linux.SigAction{}, syserror.EINVAL } tg.pidns.owner.mu.RLock() @@ -718,48 +718,6 @@ func (tg *ThreadGroup) SetSignalAct(sig linux.Signal, actptr *arch.SignalAct) (a return oldact, nil } -// CopyOutSignalAct converts the given SignalAct into an architecture-specific -// type and then copies it out to task memory. -func (t *Task) CopyOutSignalAct(addr hostarch.Addr, s *arch.SignalAct) error { - n := t.Arch().NewSignalAct() - n.SerializeFrom(s) - _, err := n.CopyOut(t, addr) - return err -} - -// CopyInSignalAct copies an architecture-specific sigaction type from task -// memory and then converts it into a SignalAct. -func (t *Task) CopyInSignalAct(addr hostarch.Addr) (arch.SignalAct, error) { - n := t.Arch().NewSignalAct() - var s arch.SignalAct - if _, err := n.CopyIn(t, addr); err != nil { - return s, err - } - n.DeserializeTo(&s) - return s, nil -} - -// CopyOutSignalStack converts the given SignalStack into an -// architecture-specific type and then copies it out to task memory. -func (t *Task) CopyOutSignalStack(addr hostarch.Addr, s *arch.SignalStack) error { - n := t.Arch().NewSignalStack() - n.SerializeFrom(s) - _, err := n.CopyOut(t, addr) - return err -} - -// CopyInSignalStack copies an architecture-specific stack_t from task memory -// and then converts it into a SignalStack. -func (t *Task) CopyInSignalStack(addr hostarch.Addr) (arch.SignalStack, error) { - n := t.Arch().NewSignalStack() - var s arch.SignalStack - if _, err := n.CopyIn(t, addr); err != nil { - return s, err - } - n.DeserializeTo(&s) - return s, nil -} - // groupStop is a TaskStop placed on tasks that have received a stop signal // (SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU). (The term "group-stop" originates from // the ptrace man page.) @@ -774,7 +732,7 @@ func (*groupStop) Killable() bool { return true } // previously-dequeued stop signal. // // Preconditions: The caller must be running on the task goroutine. -func (t *Task) initiateGroupStop(info *arch.SignalInfo) { +func (t *Task) initiateGroupStop(info *linux.SignalInfo) { t.tg.pidns.owner.mu.RLock() defer t.tg.pidns.owner.mu.RUnlock() t.tg.signalHandlers.mu.Lock() @@ -909,8 +867,8 @@ func (t *Task) signalStop(target *Task, code int32, status int32) { t.tg.signalHandlers.mu.Lock() defer t.tg.signalHandlers.mu.Unlock() act, ok := t.tg.signalHandlers.actions[linux.SIGCHLD] - if !ok || (act.Handler != arch.SignalActIgnore && act.Flags&arch.SignalFlagNoCldStop == 0) { - sigchld := &arch.SignalInfo{ + if !ok || (act.Handler != linux.SIG_IGN && act.Flags&linux.SA_NOCLDSTOP == 0) { + sigchld := &linux.SignalInfo{ Signo: int32(linux.SIGCHLD), Code: code, } @@ -955,14 +913,14 @@ func (*runInterrupt) execute(t *Task) taskRunState { // notified its tracer accordingly. But it's consistent with // Linux... if intr { - tracer.signalStop(t.tg.leader, arch.CLD_STOPPED, int32(sig)) + tracer.signalStop(t.tg.leader, linux.CLD_STOPPED, int32(sig)) if !notifyParent { tracer.tg.eventQueue.Notify(EventGroupContinue | EventTraceeStop | EventChildGroupStop) } else { tracer.tg.eventQueue.Notify(EventGroupContinue | EventTraceeStop) } } else { - tracer.signalStop(t.tg.leader, arch.CLD_CONTINUED, int32(sig)) + tracer.signalStop(t.tg.leader, linux.CLD_CONTINUED, int32(sig)) tracer.tg.eventQueue.Notify(EventGroupContinue) } } @@ -974,10 +932,10 @@ func (*runInterrupt) execute(t *Task) taskRunState { // SIGCHLD is a standard signal, so the latter would always be // dropped. Hence sending only the former is equivalent. if intr { - t.tg.leader.parent.signalStop(t.tg.leader, arch.CLD_STOPPED, int32(sig)) + t.tg.leader.parent.signalStop(t.tg.leader, linux.CLD_STOPPED, int32(sig)) t.tg.leader.parent.tg.eventQueue.Notify(EventGroupContinue | EventChildGroupStop) } else { - t.tg.leader.parent.signalStop(t.tg.leader, arch.CLD_CONTINUED, int32(sig)) + t.tg.leader.parent.signalStop(t.tg.leader, linux.CLD_CONTINUED, int32(sig)) t.tg.leader.parent.tg.eventQueue.Notify(EventGroupContinue) } } @@ -1018,7 +976,7 @@ func (*runInterrupt) execute(t *Task) taskRunState { // without requiring an extra PTRACE_GETSIGINFO call." - // "Group-stop", ptrace(2) t.ptraceCode = int32(sig) | linux.PTRACE_EVENT_STOP<<8 - t.ptraceSiginfo = &arch.SignalInfo{ + t.ptraceSiginfo = &linux.SignalInfo{ Signo: int32(sig), Code: t.ptraceCode, } @@ -1029,7 +987,7 @@ func (*runInterrupt) execute(t *Task) taskRunState { t.ptraceSiginfo = nil } if t.beginPtraceStopLocked() { - tracer.signalStop(t, arch.CLD_STOPPED, int32(sig)) + tracer.signalStop(t, linux.CLD_STOPPED, int32(sig)) // For consistency with Linux, if the parent and tracer are in the // same thread group, deduplicate notification signals. if notifyParent && tracer.tg == t.tg.leader.parent.tg { @@ -1047,7 +1005,7 @@ func (*runInterrupt) execute(t *Task) taskRunState { t.tg.signalHandlers.mu.Unlock() } if notifyParent { - t.tg.leader.parent.signalStop(t.tg.leader, arch.CLD_STOPPED, int32(sig)) + t.tg.leader.parent.signalStop(t.tg.leader, linux.CLD_STOPPED, int32(sig)) t.tg.leader.parent.tg.eventQueue.Notify(EventChildGroupStop) } t.tg.pidns.owner.mu.RUnlock() @@ -1101,7 +1059,7 @@ func (*runInterruptAfterSignalDeliveryStop) execute(t *Task) taskRunState { if sig != linux.Signal(info.Signo) { info.Signo = int32(sig) info.Errno = 0 - info.Code = arch.SignalInfoUser + info.Code = linux.SI_USER // pid isn't a valid field for all signal numbers, but Linux // doesn't care (kernel/signal.c:ptrace_signal()). // diff --git a/pkg/sentry/kernel/task_start.go b/pkg/sentry/kernel/task_start.go index 32031cd70..41fd2d471 100644 --- a/pkg/sentry/kernel/task_start.go +++ b/pkg/sentry/kernel/task_start.go @@ -18,7 +18,6 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/hostarch" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/inet" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" "gvisor.dev/gvisor/pkg/sentry/kernel/futex" @@ -131,7 +130,7 @@ func (ts *TaskSet) newTask(cfg *TaskConfig) (*Task, error) { runState: (*runApp)(nil), interruptChan: make(chan struct{}, 1), signalMask: cfg.SignalMask, - signalStack: arch.SignalStack{Flags: arch.SignalStackFlagDisable}, + signalStack: linux.SignalStack{Flags: linux.SS_DISABLE}, image: *image, fsContext: cfg.FSContext, fdTable: cfg.FDTable, diff --git a/pkg/sentry/kernel/thread_group.go b/pkg/sentry/kernel/thread_group.go index b92e98fa1..891e2201d 100644 --- a/pkg/sentry/kernel/thread_group.go +++ b/pkg/sentry/kernel/thread_group.go @@ -19,7 +19,6 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/fs" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time" @@ -446,10 +445,10 @@ func (tg *ThreadGroup) ReleaseControllingTTY(tty *TTY) error { othertg.signalHandlers.mu.Lock() othertg.tty = nil if othertg.processGroup == tg.processGroup.session.foreground { - if err := othertg.leader.sendSignalLocked(&arch.SignalInfo{Signo: int32(linux.SIGHUP)}, true /* group */); err != nil { + if err := othertg.leader.sendSignalLocked(&linux.SignalInfo{Signo: int32(linux.SIGHUP)}, true /* group */); err != nil { lastErr = err } - if err := othertg.leader.sendSignalLocked(&arch.SignalInfo{Signo: int32(linux.SIGCONT)}, true /* group */); err != nil { + if err := othertg.leader.sendSignalLocked(&linux.SignalInfo{Signo: int32(linux.SIGCONT)}, true /* group */); err != nil { lastErr = err } } @@ -490,10 +489,10 @@ func (tg *ThreadGroup) SetForegroundProcessGroup(tty *TTY, pgid ProcessGroupID) tg.signalHandlers.mu.Lock() defer tg.signalHandlers.mu.Unlock() - // TODO(b/129283598): "If tcsetpgrp() is called by a member of a - // background process group in its session, and the calling process is - // not blocking or ignoring SIGTTOU, a SIGTTOU signal is sent to all - // members of this background process group." + // TODO(gvisor.dev/issue/6148): "If tcsetpgrp() is called by a member of a + // background process group in its session, and the calling process is not + // blocking or ignoring SIGTTOU, a SIGTTOU signal is sent to all members of + // this background process group." // tty must be the controlling terminal. if tg.tty != tty { diff --git a/pkg/sentry/kernel/time/time.go b/pkg/sentry/kernel/time/time.go index f61a8e164..26aa34aa6 100644 --- a/pkg/sentry/kernel/time/time.go +++ b/pkg/sentry/kernel/time/time.go @@ -458,25 +458,6 @@ func NewTimer(clock Clock, listener TimerListener) *Timer { return t } -// After waits for the duration to elapse according to clock and then sends a -// notification on the returned channel. The timer is started immediately and -// will fire exactly once. The second return value is the start time used with -// the duration. -// -// Callers must call Timer.Destroy. -func After(clock Clock, duration time.Duration) (*Timer, Time, <-chan struct{}) { - notifier, tchan := NewChannelNotifier() - t := NewTimer(clock, notifier) - now := clock.Now() - - t.Swap(Setting{ - Enabled: true, - Period: 0, - Next: now.Add(duration), - }) - return t, now, tchan -} - // init initializes Timer state that is not preserved across save/restore. If // init has already been called, calling it again is a no-op. // diff --git a/pkg/sentry/loader/interpreter.go b/pkg/sentry/loader/interpreter.go index 3886b4d33..3e302d92c 100644 --- a/pkg/sentry/loader/interpreter.go +++ b/pkg/sentry/loader/interpreter.go @@ -59,7 +59,7 @@ func parseInterpreterScript(ctx context.Context, filename string, f fsbridge.Fil // Linux silently truncates the remainder of the line if it exceeds // interpMaxLineLength. i := bytes.IndexByte(line, '\n') - if i > 0 { + if i >= 0 { line = line[:i] } diff --git a/pkg/sentry/pgalloc/pgalloc.go b/pkg/sentry/pgalloc/pgalloc.go index b81292c46..d1a883da4 100644 --- a/pkg/sentry/pgalloc/pgalloc.go +++ b/pkg/sentry/pgalloc/pgalloc.go @@ -1062,10 +1062,20 @@ func (f *MemoryFile) runReclaim() { break } - // If ManualZeroing is in effect, pages will be zeroed on allocation - // and may not be freed by decommitFile, so calling decommitFile is - // unnecessary. - if !f.opts.ManualZeroing { + if f.opts.ManualZeroing { + // If ManualZeroing is in effect, only hugepage-aligned regions may + // be safely passed to decommitFile. Pages will be zeroed on + // reallocation, so we don't need to perform any manual zeroing + // here, whether or not decommitFile succeeds. + if startAddr, ok := hostarch.Addr(fr.Start).HugeRoundUp(); ok { + if endAddr := hostarch.Addr(fr.End).HugeRoundDown(); startAddr < endAddr { + decommitFR := memmap.FileRange{uint64(startAddr), uint64(endAddr)} + if err := f.decommitFile(decommitFR); err != nil { + log.Warningf("Reclaim failed to decommit %v: %v", decommitFR, err) + } + } + } + } else { if err := f.decommitFile(fr); err != nil { log.Warningf("Reclaim failed to decommit %v: %v", fr, err) // Zero the pages manually. This won't reduce memory usage, but at diff --git a/pkg/sentry/platform/kvm/BUILD b/pkg/sentry/platform/kvm/BUILD index b307832fd..8a490b3de 100644 --- a/pkg/sentry/platform/kvm/BUILD +++ b/pkg/sentry/platform/kvm/BUILD @@ -6,6 +6,8 @@ go_library( name = "kvm", srcs = [ "address_space.go", + "address_space_amd64.go", + "address_space_arm64.go", "bluepill.go", "bluepill_allocator.go", "bluepill_amd64.go", @@ -77,6 +79,7 @@ go_test( "requires-kvm", ], deps = [ + "//pkg/abi/linux", "//pkg/hostarch", "//pkg/ring0", "//pkg/ring0/pagetables", diff --git a/pkg/sentry/platform/kvm/address_space.go b/pkg/sentry/platform/kvm/address_space.go index 5524e8727..9929caebb 100644 --- a/pkg/sentry/platform/kvm/address_space.go +++ b/pkg/sentry/platform/kvm/address_space.go @@ -85,15 +85,6 @@ type addressSpace struct { dirtySet *dirtySet } -// invalidate is the implementation for Invalidate. -func (as *addressSpace) invalidate() { - as.dirtySet.forEach(as.machine, func(c *vCPU) { - if c.active.get() == as { // If this happens to be active, - c.BounceToKernel() // ... force a kernel transition. - } - }) -} - // Invalidate interrupts all dirty contexts. func (as *addressSpace) Invalidate() { as.mu.Lock() diff --git a/pkg/tcpip/transport/tcp/rcv_state.go b/pkg/sentry/platform/kvm/address_space_amd64.go index 2bf21a2e7..d11d38679 100644 --- a/pkg/tcpip/transport/tcp/rcv_state.go +++ b/pkg/sentry/platform/kvm/address_space_amd64.go @@ -1,4 +1,4 @@ -// Copyright 2019 The gVisor Authors. +// Copyright 2021 The gVisor Authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. @@ -12,18 +12,13 @@ // See the License for the specific language governing permissions and // limitations under the License. -package tcp +package kvm -import ( - "time" -) - -// saveLastRcvdAckTime is invoked by stateify. -func (r *receiver) saveLastRcvdAckTime() unixTime { - return unixTime{r.lastRcvdAckTime.Unix(), r.lastRcvdAckTime.UnixNano()} -} - -// loadLastRcvdAckTime is invoked by stateify. -func (r *receiver) loadLastRcvdAckTime(unix unixTime) { - r.lastRcvdAckTime = time.Unix(unix.second, unix.nano) +// invalidate is the implementation for Invalidate. +func (as *addressSpace) invalidate() { + as.dirtySet.forEach(as.machine, func(c *vCPU) { + if c.active.get() == as { // If this happens to be active, + c.BounceToKernel() // ... force a kernel transition. + } + }) } diff --git a/pkg/tcpip/time.s b/pkg/sentry/platform/kvm/address_space_arm64.go index fb37360ac..fb954418b 100644 --- a/pkg/tcpip/time.s +++ b/pkg/sentry/platform/kvm/address_space_arm64.go @@ -1,4 +1,4 @@ -// Copyright 2018 The gVisor Authors. +// Copyright 2021 The gVisor Authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. @@ -12,4 +12,14 @@ // See the License for the specific language governing permissions and // limitations under the License. -// Empty assembly file so empty func definitions work. +package kvm + +import ( + "gvisor.dev/gvisor/pkg/ring0" +) + +// invalidate is the implementation for Invalidate. +func (as *addressSpace) invalidate() { + bluepill(as.pageTables.Allocator.(*allocator).cpu) + ring0.FlushTlbAll() +} diff --git a/pkg/sentry/platform/kvm/context.go b/pkg/sentry/platform/kvm/context.go index f4d4473a8..183e741ea 100644 --- a/pkg/sentry/platform/kvm/context.go +++ b/pkg/sentry/platform/kvm/context.go @@ -17,6 +17,7 @@ package kvm import ( "sync/atomic" + "gvisor.dev/gvisor/pkg/abi/linux" pkgcontext "gvisor.dev/gvisor/pkg/context" "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/ring0" @@ -32,15 +33,15 @@ type context struct { // machine is the parent machine, and is immutable. machine *machine - // info is the arch.SignalInfo cached for this context. - info arch.SignalInfo + // info is the linux.SignalInfo cached for this context. + info linux.SignalInfo // interrupt is the interrupt context. interrupt interrupt.Forwarder } // Switch runs the provided context in the given address space. -func (c *context) Switch(ctx pkgcontext.Context, mm platform.MemoryManager, ac arch.Context, _ int32) (*arch.SignalInfo, hostarch.AccessType, error) { +func (c *context) Switch(ctx pkgcontext.Context, mm platform.MemoryManager, ac arch.Context, _ int32) (*linux.SignalInfo, hostarch.AccessType, error) { as := mm.AddressSpace() localAS := as.(*addressSpace) diff --git a/pkg/sentry/platform/kvm/kvm_amd64_test.go b/pkg/sentry/platform/kvm/kvm_amd64_test.go index b8dd1e4a5..b1cab89a0 100644 --- a/pkg/sentry/platform/kvm/kvm_amd64_test.go +++ b/pkg/sentry/platform/kvm/kvm_amd64_test.go @@ -19,6 +19,7 @@ package kvm import ( "testing" + "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/ring0" "gvisor.dev/gvisor/pkg/ring0/pagetables" "gvisor.dev/gvisor/pkg/sentry/arch" @@ -30,7 +31,7 @@ func TestSegments(t *testing.T) { applicationTest(t, true, testutil.TwiddleSegments, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { testutil.SetTestSegments(regs) for { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -55,7 +56,7 @@ func stmxcsr(addr *uint32) func TestMXCSR(t *testing.T) { applicationTest(t, true, testutil.SyscallLoop, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { - var si arch.SignalInfo + var si linux.SignalInfo switchOpts := ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, diff --git a/pkg/sentry/platform/kvm/kvm_test.go b/pkg/sentry/platform/kvm/kvm_test.go index ceff09a60..fe570aff9 100644 --- a/pkg/sentry/platform/kvm/kvm_test.go +++ b/pkg/sentry/platform/kvm/kvm_test.go @@ -22,6 +22,7 @@ import ( "time" "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/ring0" "gvisor.dev/gvisor/pkg/ring0/pagetables" @@ -157,7 +158,7 @@ func applicationTest(t testHarness, useHostMappings bool, target func(), fn func func TestApplicationSyscall(t *testing.T) { applicationTest(t, true, testutil.SyscallLoop, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -171,7 +172,7 @@ func TestApplicationSyscall(t *testing.T) { return false }) applicationTest(t, true, testutil.SyscallLoop, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -188,7 +189,7 @@ func TestApplicationSyscall(t *testing.T) { func TestApplicationFault(t *testing.T) { applicationTest(t, true, testutil.Touch, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { testutil.SetTouchTarget(regs, nil) // Cause fault. - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -203,7 +204,7 @@ func TestApplicationFault(t *testing.T) { }) applicationTest(t, true, testutil.Touch, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { testutil.SetTouchTarget(regs, nil) // Cause fault. - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -221,7 +222,7 @@ func TestRegistersSyscall(t *testing.T) { applicationTest(t, true, testutil.TwiddleRegsSyscall, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { testutil.SetTestRegs(regs) // Fill values for all registers. for { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -244,7 +245,7 @@ func TestRegistersFault(t *testing.T) { applicationTest(t, true, testutil.TwiddleRegsFault, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { testutil.SetTestRegs(regs) // Fill values for all registers. for { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -270,7 +271,7 @@ func TestBounce(t *testing.T) { time.Sleep(time.Millisecond) c.BounceToKernel() }() - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -285,7 +286,7 @@ func TestBounce(t *testing.T) { time.Sleep(time.Millisecond) c.BounceToKernel() }() - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -317,7 +318,7 @@ func TestBounceStress(t *testing.T) { c.BounceToKernel() }() randomSleep() - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -338,7 +339,7 @@ func TestInvalidate(t *testing.T) { applicationTest(t, true, testutil.Touch, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { testutil.SetTouchTarget(regs, &data) // Read legitimate value. for { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -353,7 +354,7 @@ func TestInvalidate(t *testing.T) { // Unmap the page containing data & invalidate. pt.Unmap(hostarch.Addr(reflect.ValueOf(&data).Pointer() & ^uintptr(hostarch.PageSize-1)), hostarch.PageSize) for { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -371,13 +372,13 @@ func TestInvalidate(t *testing.T) { } // IsFault returns true iff the given signal represents a fault. -func IsFault(err error, si *arch.SignalInfo) bool { +func IsFault(err error, si *linux.SignalInfo) bool { return err == platform.ErrContextSignal && si.Signo == int32(unix.SIGSEGV) } func TestEmptyAddressSpace(t *testing.T) { applicationTest(t, false, testutil.SyscallLoop, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -391,7 +392,7 @@ func TestEmptyAddressSpace(t *testing.T) { return false }) applicationTest(t, false, testutil.SyscallLoop, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -467,7 +468,7 @@ func BenchmarkApplicationSyscall(b *testing.B) { a int // Count for ErrContextInterrupt. ) applicationTest(b, true, testutil.SyscallLoop, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, @@ -504,7 +505,7 @@ func BenchmarkWorldSwitchToUserRoundtrip(b *testing.B) { a int ) applicationTest(b, true, testutil.SyscallLoop, func(c *vCPU, regs *arch.Registers, pt *pagetables.PageTables) bool { - var si arch.SignalInfo + var si linux.SignalInfo if _, err := c.SwitchToUser(ring0.SwitchOpts{ Registers: regs, FloatingPointState: &dummyFPState, diff --git a/pkg/sentry/platform/kvm/machine_amd64.go b/pkg/sentry/platform/kvm/machine_amd64.go index 9a2337654..7c063c7f5 100644 --- a/pkg/sentry/platform/kvm/machine_amd64.go +++ b/pkg/sentry/platform/kvm/machine_amd64.go @@ -23,11 +23,11 @@ import ( "runtime/debug" "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/cpuid" "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/ring0" "gvisor.dev/gvisor/pkg/ring0/pagetables" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/arch/fpu" "gvisor.dev/gvisor/pkg/sentry/platform" ktime "gvisor.dev/gvisor/pkg/sentry/time" @@ -264,10 +264,10 @@ func (c *vCPU) setSystemTime() error { // nonCanonical generates a canonical address return. // //go:nosplit -func nonCanonical(addr uint64, signal int32, info *arch.SignalInfo) (hostarch.AccessType, error) { - *info = arch.SignalInfo{ +func nonCanonical(addr uint64, signal int32, info *linux.SignalInfo) (hostarch.AccessType, error) { + *info = linux.SignalInfo{ Signo: signal, - Code: arch.SignalInfoKernel, + Code: linux.SI_KERNEL, } info.SetAddr(addr) // Include address. return hostarch.NoAccess, platform.ErrContextSignal @@ -276,7 +276,7 @@ func nonCanonical(addr uint64, signal int32, info *arch.SignalInfo) (hostarch.Ac // fault generates an appropriate fault return. // //go:nosplit -func (c *vCPU) fault(signal int32, info *arch.SignalInfo) (hostarch.AccessType, error) { +func (c *vCPU) fault(signal int32, info *linux.SignalInfo) (hostarch.AccessType, error) { bluepill(c) // Probably no-op, but may not be. faultAddr := ring0.ReadCR2() code, user := c.ErrorCode() @@ -287,7 +287,7 @@ func (c *vCPU) fault(signal int32, info *arch.SignalInfo) (hostarch.AccessType, return hostarch.NoAccess, platform.ErrContextInterrupt } // Reset the pointed SignalInfo. - *info = arch.SignalInfo{Signo: signal} + *info = linux.SignalInfo{Signo: signal} info.SetAddr(uint64(faultAddr)) accessType := hostarch.AccessType{ Read: code&(1<<1) == 0, @@ -325,7 +325,7 @@ func prefaultFloatingPointState(data *fpu.State) { } // SwitchToUser unpacks architectural-details. -func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *arch.SignalInfo) (hostarch.AccessType, error) { +func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *linux.SignalInfo) (hostarch.AccessType, error) { // Check for canonical addresses. if regs := switchOpts.Registers; !ring0.IsCanonical(regs.Rip) { return nonCanonical(regs.Rip, int32(unix.SIGSEGV), info) @@ -371,7 +371,7 @@ func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *arch.SignalInfo) return c.fault(int32(unix.SIGSEGV), info) case ring0.Debug, ring0.Breakpoint: - *info = arch.SignalInfo{ + *info = linux.SignalInfo{ Signo: int32(unix.SIGTRAP), Code: 1, // TRAP_BRKPT (breakpoint). } @@ -383,9 +383,9 @@ func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *arch.SignalInfo) ring0.BoundRangeExceeded, ring0.InvalidTSS, ring0.StackSegmentFault: - *info = arch.SignalInfo{ + *info = linux.SignalInfo{ Signo: int32(unix.SIGSEGV), - Code: arch.SignalInfoKernel, + Code: linux.SI_KERNEL, } info.SetAddr(switchOpts.Registers.Rip) // Include address. if vector == ring0.GeneralProtectionFault { @@ -397,7 +397,7 @@ func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *arch.SignalInfo) return hostarch.AccessType{}, platform.ErrContextSignal case ring0.InvalidOpcode: - *info = arch.SignalInfo{ + *info = linux.SignalInfo{ Signo: int32(unix.SIGILL), Code: 1, // ILL_ILLOPC (illegal opcode). } @@ -405,7 +405,7 @@ func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *arch.SignalInfo) return hostarch.AccessType{}, platform.ErrContextSignal case ring0.DivideByZero: - *info = arch.SignalInfo{ + *info = linux.SignalInfo{ Signo: int32(unix.SIGFPE), Code: 1, // FPE_INTDIV (divide by zero). } @@ -413,7 +413,7 @@ func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *arch.SignalInfo) return hostarch.AccessType{}, platform.ErrContextSignal case ring0.Overflow: - *info = arch.SignalInfo{ + *info = linux.SignalInfo{ Signo: int32(unix.SIGFPE), Code: 2, // FPE_INTOVF (integer overflow). } @@ -422,7 +422,7 @@ func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *arch.SignalInfo) case ring0.X87FloatingPointException, ring0.SIMDFloatingPointException: - *info = arch.SignalInfo{ + *info = linux.SignalInfo{ Signo: int32(unix.SIGFPE), Code: 7, // FPE_FLTINV (invalid operation). } @@ -433,7 +433,7 @@ func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *arch.SignalInfo) return hostarch.NoAccess, platform.ErrContextInterrupt case ring0.AlignmentCheck: - *info = arch.SignalInfo{ + *info = linux.SignalInfo{ Signo: int32(unix.SIGBUS), Code: 2, // BUS_ADRERR (physical address does not exist). } @@ -469,7 +469,7 @@ func availableRegionsForSetMem() (phyRegions []physicalRegion) { } func (m *machine) mapUpperHalf(pageTable *pagetables.PageTables) { - // Map all the executible regions so that all the entry functions + // Map all the executable regions so that all the entry functions // are mapped in the upper half. applyVirtualRegions(func(vr virtualRegion) { if excludeVirtualRegion(vr) || vr.filename == "[vsyscall]" { diff --git a/pkg/sentry/platform/kvm/machine_arm64.go b/pkg/sentry/platform/kvm/machine_arm64.go index 8926b1d9f..edaccf9bc 100644 --- a/pkg/sentry/platform/kvm/machine_arm64.go +++ b/pkg/sentry/platform/kvm/machine_arm64.go @@ -21,10 +21,10 @@ import ( "sync/atomic" "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/ring0" "gvisor.dev/gvisor/pkg/ring0/pagetables" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/arch/fpu" "gvisor.dev/gvisor/pkg/sentry/platform" ) @@ -126,10 +126,10 @@ func availableRegionsForSetMem() (phyRegions []physicalRegion) { // nonCanonical generates a canonical address return. // //go:nosplit -func nonCanonical(addr uint64, signal int32, info *arch.SignalInfo) (hostarch.AccessType, error) { - *info = arch.SignalInfo{ +func nonCanonical(addr uint64, signal int32, info *linux.SignalInfo) (hostarch.AccessType, error) { + *info = linux.SignalInfo{ Signo: signal, - Code: arch.SignalInfoKernel, + Code: linux.SI_KERNEL, } info.SetAddr(addr) // Include address. return hostarch.NoAccess, platform.ErrContextSignal @@ -157,7 +157,7 @@ func isWriteFault(code uint64) bool { // fault generates an appropriate fault return. // //go:nosplit -func (c *vCPU) fault(signal int32, info *arch.SignalInfo) (hostarch.AccessType, error) { +func (c *vCPU) fault(signal int32, info *linux.SignalInfo) (hostarch.AccessType, error) { bluepill(c) // Probably no-op, but may not be. faultAddr := c.GetFaultAddr() code, user := c.ErrorCode() @@ -170,7 +170,7 @@ func (c *vCPU) fault(signal int32, info *arch.SignalInfo) (hostarch.AccessType, } // Reset the pointed SignalInfo. - *info = arch.SignalInfo{Signo: signal} + *info = linux.SignalInfo{Signo: signal} info.SetAddr(uint64(faultAddr)) ret := code & _ESR_ELx_FSC diff --git a/pkg/sentry/platform/kvm/machine_arm64_unsafe.go b/pkg/sentry/platform/kvm/machine_arm64_unsafe.go index 92edc992b..1b0a6e0a7 100644 --- a/pkg/sentry/platform/kvm/machine_arm64_unsafe.go +++ b/pkg/sentry/platform/kvm/machine_arm64_unsafe.go @@ -23,10 +23,10 @@ import ( "unsafe" "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/ring0" "gvisor.dev/gvisor/pkg/ring0/pagetables" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/arch/fpu" "gvisor.dev/gvisor/pkg/sentry/platform" ktime "gvisor.dev/gvisor/pkg/sentry/time" @@ -272,7 +272,7 @@ func (c *vCPU) getOneRegister(reg *kvmOneReg) error { } // SwitchToUser unpacks architectural-details. -func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *arch.SignalInfo) (hostarch.AccessType, error) { +func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *linux.SignalInfo) (hostarch.AccessType, error) { // Check for canonical addresses. if regs := switchOpts.Registers; !ring0.IsCanonical(regs.Pc) { return nonCanonical(regs.Pc, int32(unix.SIGSEGV), info) @@ -319,14 +319,14 @@ func (c *vCPU) SwitchToUser(switchOpts ring0.SwitchOpts, info *arch.SignalInfo) case ring0.El0SyncUndef: return c.fault(int32(unix.SIGILL), info) case ring0.El0SyncDbg: - *info = arch.SignalInfo{ + *info = linux.SignalInfo{ Signo: int32(unix.SIGTRAP), Code: 1, // TRAP_BRKPT (breakpoint). } info.SetAddr(switchOpts.Registers.Pc) // Include address. return hostarch.AccessType{}, platform.ErrContextSignal case ring0.El0SyncSpPc: - *info = arch.SignalInfo{ + *info = linux.SignalInfo{ Signo: int32(unix.SIGBUS), Code: 2, // BUS_ADRERR (physical address does not exist). } diff --git a/pkg/sentry/platform/platform.go b/pkg/sentry/platform/platform.go index ef7814a6f..a26bc2316 100644 --- a/pkg/sentry/platform/platform.go +++ b/pkg/sentry/platform/platform.go @@ -195,8 +195,8 @@ type Context interface { // - nil: The Context invoked a system call. // // - ErrContextSignal: The Context was interrupted by a signal. The - // returned *arch.SignalInfo contains information about the signal. If - // arch.SignalInfo.Signo == SIGSEGV, the returned hostarch.AccessType + // returned *linux.SignalInfo contains information about the signal. If + // linux.SignalInfo.Signo == SIGSEGV, the returned hostarch.AccessType // contains the access type of the triggering fault. The caller owns // the returned SignalInfo. // @@ -207,7 +207,7 @@ type Context interface { // concurrent call to Switch(). // // - ErrContextCPUPreempted: See the definition of that error for details. - Switch(ctx context.Context, mm MemoryManager, ac arch.Context, cpu int32) (*arch.SignalInfo, hostarch.AccessType, error) + Switch(ctx context.Context, mm MemoryManager, ac arch.Context, cpu int32) (*linux.SignalInfo, hostarch.AccessType, error) // PullFullState() pulls a full state of the application thread. // diff --git a/pkg/sentry/platform/ptrace/ptrace.go b/pkg/sentry/platform/ptrace/ptrace.go index 828458ce2..319b0cf1d 100644 --- a/pkg/sentry/platform/ptrace/ptrace.go +++ b/pkg/sentry/platform/ptrace/ptrace.go @@ -73,7 +73,7 @@ var ( type context struct { // signalInfo is the signal info, if and when a signal is received. - signalInfo arch.SignalInfo + signalInfo linux.SignalInfo // interrupt is the interrupt context. interrupt interrupt.Forwarder @@ -96,7 +96,7 @@ type context struct { } // Switch runs the provided context in the given address space. -func (c *context) Switch(ctx pkgcontext.Context, mm platform.MemoryManager, ac arch.Context, cpu int32) (*arch.SignalInfo, hostarch.AccessType, error) { +func (c *context) Switch(ctx pkgcontext.Context, mm platform.MemoryManager, ac arch.Context, cpu int32) (*linux.SignalInfo, hostarch.AccessType, error) { as := mm.AddressSpace() s := as.(*subprocess) isSyscall := s.switchToApp(c, ac) diff --git a/pkg/sentry/platform/ptrace/ptrace_unsafe.go b/pkg/sentry/platform/ptrace/ptrace_unsafe.go index facb96011..cc93396a9 100644 --- a/pkg/sentry/platform/ptrace/ptrace_unsafe.go +++ b/pkg/sentry/platform/ptrace/ptrace_unsafe.go @@ -101,7 +101,7 @@ func (t *thread) setFPRegs(fpState *fpu.State, fpLen uint64, useXsave bool) erro } // getSignalInfo retrieves information about the signal that caused the stop. -func (t *thread) getSignalInfo(si *arch.SignalInfo) error { +func (t *thread) getSignalInfo(si *linux.SignalInfo) error { _, _, errno := unix.RawSyscall6( unix.SYS_PTRACE, unix.PTRACE_GETSIGINFO, diff --git a/pkg/sentry/platform/ptrace/subprocess.go b/pkg/sentry/platform/ptrace/subprocess.go index 9c73a725a..0931795c5 100644 --- a/pkg/sentry/platform/ptrace/subprocess.go +++ b/pkg/sentry/platform/ptrace/subprocess.go @@ -20,6 +20,7 @@ import ( "runtime" "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/log" "gvisor.dev/gvisor/pkg/procid" @@ -524,7 +525,7 @@ func (s *subprocess) switchToApp(c *context, ac arch.Context) bool { // Check for interrupts, and ensure that future interrupts will signal t. if !c.interrupt.Enable(t) { // Pending interrupt; simulate. - c.signalInfo = arch.SignalInfo{Signo: int32(platform.SignalInterrupt)} + c.signalInfo = linux.SignalInfo{Signo: int32(platform.SignalInterrupt)} return false } defer c.interrupt.Disable() diff --git a/pkg/sentry/platform/ptrace/subprocess_amd64.go b/pkg/sentry/platform/ptrace/subprocess_amd64.go index 9252c0bd7..90b1ead56 100644 --- a/pkg/sentry/platform/ptrace/subprocess_amd64.go +++ b/pkg/sentry/platform/ptrace/subprocess_amd64.go @@ -155,7 +155,7 @@ func initChildProcessPPID(initregs *arch.Registers, ppid int32) { // // Note that this should only be called after verifying that the signalInfo has // been generated by the kernel. -func patchSignalInfo(regs *arch.Registers, signalInfo *arch.SignalInfo) { +func patchSignalInfo(regs *arch.Registers, signalInfo *linux.SignalInfo) { if linux.Signal(signalInfo.Signo) == linux.SIGSYS { signalInfo.Signo = int32(linux.SIGSEGV) diff --git a/pkg/sentry/platform/ptrace/subprocess_arm64.go b/pkg/sentry/platform/ptrace/subprocess_arm64.go index c0cbc0686..e4257e3bf 100644 --- a/pkg/sentry/platform/ptrace/subprocess_arm64.go +++ b/pkg/sentry/platform/ptrace/subprocess_arm64.go @@ -138,7 +138,7 @@ func initChildProcessPPID(initregs *arch.Registers, ppid int32) { // // Note that this should only be called after verifying that the signalInfo has // been generated by the kernel. -func patchSignalInfo(regs *arch.Registers, signalInfo *arch.SignalInfo) { +func patchSignalInfo(regs *arch.Registers, signalInfo *linux.SignalInfo) { if linux.Signal(signalInfo.Signo) == linux.SIGSYS { signalInfo.Signo = int32(linux.SIGSEGV) diff --git a/pkg/sentry/sighandling/sighandling_unsafe.go b/pkg/sentry/sighandling/sighandling_unsafe.go index d6a2fbe34..3fe5c6770 100644 --- a/pkg/sentry/sighandling/sighandling_unsafe.go +++ b/pkg/sentry/sighandling/sighandling_unsafe.go @@ -21,25 +21,16 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" ) -// FIXME(gvisor.dev/issue/214): Move to pkg/abi/linux along with definitions in -// pkg/sentry/arch. -type sigaction struct { - handler uintptr - flags uint64 - restorer uintptr - mask uint64 -} - // IgnoreChildStop sets the SA_NOCLDSTOP flag, causing child processes to not // generate SIGCHLD when they stop. func IgnoreChildStop() error { - var sa sigaction + var sa linux.SigAction // Get the existing signal handler information, and set the flag. if _, _, e := unix.RawSyscall6(unix.SYS_RT_SIGACTION, uintptr(unix.SIGCHLD), 0, uintptr(unsafe.Pointer(&sa)), linux.SignalSetSize, 0, 0); e != 0 { return e } - sa.flags |= linux.SA_NOCLDSTOP + sa.Flags |= linux.SA_NOCLDSTOP if _, _, e := unix.RawSyscall6(unix.SYS_RT_SIGACTION, uintptr(unix.SIGCHLD), uintptr(unsafe.Pointer(&sa)), 0, linux.SignalSetSize, 0, 0); e != 0 { return e } diff --git a/pkg/sentry/socket/hostinet/BUILD b/pkg/sentry/socket/hostinet/BUILD index 2e3064565..3c6511ead 100644 --- a/pkg/sentry/socket/hostinet/BUILD +++ b/pkg/sentry/socket/hostinet/BUILD @@ -39,8 +39,6 @@ go_library( "//pkg/syserr", "//pkg/syserror", "//pkg/tcpip", - "//pkg/tcpip/network/ipv4", - "//pkg/tcpip/network/ipv6", "//pkg/tcpip/stack", "//pkg/usermem", "//pkg/waiter", diff --git a/pkg/sentry/socket/hostinet/stack.go b/pkg/sentry/socket/hostinet/stack.go index 393a1ab3a..cbb1e905d 100644 --- a/pkg/sentry/socket/hostinet/stack.go +++ b/pkg/sentry/socket/hostinet/stack.go @@ -35,8 +35,6 @@ import ( "gvisor.dev/gvisor/pkg/syserr" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/tcpip" - "gvisor.dev/gvisor/pkg/tcpip/network/ipv4" - "gvisor.dev/gvisor/pkg/tcpip/network/ipv6" "gvisor.dev/gvisor/pkg/tcpip/stack" "gvisor.dev/gvisor/pkg/usermem" ) @@ -66,8 +64,6 @@ type Stack struct { tcpSACKEnabled bool netDevFile *os.File netSNMPFile *os.File - ipv4Forwarding bool - ipv6Forwarding bool } // NewStack returns an empty Stack containing no configuration. @@ -127,13 +123,6 @@ func (s *Stack) Configure() error { s.netSNMPFile = f } - s.ipv6Forwarding = false - if ipForwarding, err := ioutil.ReadFile("/proc/sys/net/ipv6/conf/all/forwarding"); err == nil { - s.ipv6Forwarding = strings.TrimSpace(string(ipForwarding)) != "0" - } else { - log.Warningf("Failed to read if ipv6 forwarding is enabled, setting to false") - } - return nil } @@ -492,19 +481,6 @@ func (s *Stack) CleanupEndpoints() []stack.TransportEndpoint { return nil } // RestoreCleanupEndpoints implements inet.Stack.RestoreCleanupEndpoints. func (s *Stack) RestoreCleanupEndpoints([]stack.TransportEndpoint) {} -// Forwarding implements inet.Stack.Forwarding. -func (s *Stack) Forwarding(protocol tcpip.NetworkProtocolNumber) bool { - switch protocol { - case ipv4.ProtocolNumber: - return s.ipv4Forwarding - case ipv6.ProtocolNumber: - return s.ipv6Forwarding - default: - log.Warningf("Forwarding(%v) failed: unsupported protocol", protocol) - return false - } -} - // SetForwarding implements inet.Stack.SetForwarding. func (s *Stack) SetForwarding(tcpip.NetworkProtocolNumber, bool) error { return syserror.EACCES diff --git a/pkg/sentry/socket/netfilter/BUILD b/pkg/sentry/socket/netfilter/BUILD index 61b2c9755..608474fa1 100644 --- a/pkg/sentry/socket/netfilter/BUILD +++ b/pkg/sentry/socket/netfilter/BUILD @@ -25,6 +25,7 @@ go_library( "//pkg/log", "//pkg/marshal", "//pkg/sentry/kernel", + "//pkg/sentry/kernel/auth", "//pkg/syserr", "//pkg/tcpip", "//pkg/tcpip/header", diff --git a/pkg/sentry/socket/netfilter/extensions.go b/pkg/sentry/socket/netfilter/extensions.go index 6fc7781ad..3f1b4a17b 100644 --- a/pkg/sentry/socket/netfilter/extensions.go +++ b/pkg/sentry/socket/netfilter/extensions.go @@ -19,20 +19,12 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/bits" + "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/syserr" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/stack" ) -// TODO(gvisor.dev/issue/170): The following per-matcher params should be -// supported: -// - Table name -// - Match size -// - User size -// - Hooks -// - Proto -// - Family - // matchMaker knows how to (un)marshal the matcher named name(). type matchMaker interface { // name is the matcher name as stored in the xt_entry_match struct. @@ -43,7 +35,7 @@ type matchMaker interface { // unmarshal converts from the ABI matcher struct to an // stack.Matcher. - unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) + unmarshal(task *kernel.Task, buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) } type matcher interface { @@ -94,12 +86,12 @@ func marshalEntryMatch(name string, data []byte) []byte { return buf } -func unmarshalMatcher(match linux.XTEntryMatch, filter stack.IPHeaderFilter, buf []byte) (stack.Matcher, error) { +func unmarshalMatcher(task *kernel.Task, match linux.XTEntryMatch, filter stack.IPHeaderFilter, buf []byte) (stack.Matcher, error) { matchMaker, ok := matchMakers[match.Name.String()] if !ok { return nil, fmt.Errorf("unsupported matcher with name %q", match.Name.String()) } - return matchMaker.unmarshal(buf, filter) + return matchMaker.unmarshal(task, buf, filter) } // targetMaker knows how to (un)marshal a target. Once registered, diff --git a/pkg/sentry/socket/netfilter/ipv4.go b/pkg/sentry/socket/netfilter/ipv4.go index cb78ef60b..d8bd86292 100644 --- a/pkg/sentry/socket/netfilter/ipv4.go +++ b/pkg/sentry/socket/netfilter/ipv4.go @@ -18,6 +18,7 @@ import ( "fmt" "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/syserr" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/header" @@ -123,7 +124,7 @@ func getEntries4(table stack.Table, tablename linux.TableName) (linux.KernelIPTG return entries, info } -func modifyEntries4(stk *stack.Stack, optVal []byte, replace *linux.IPTReplace, table *stack.Table) (map[uint32]int, *syserr.Error) { +func modifyEntries4(task *kernel.Task, stk *stack.Stack, optVal []byte, replace *linux.IPTReplace, table *stack.Table) (map[uint32]int, *syserr.Error) { nflog("set entries: setting entries in table %q", replace.Name.String()) // Convert input into a list of rules and their offsets. @@ -148,23 +149,19 @@ func modifyEntries4(stk *stack.Stack, optVal []byte, replace *linux.IPTReplace, return nil, syserr.ErrInvalidArgument } - // TODO(gvisor.dev/issue/170): We should support more IPTIP - // filtering fields. filter, err := filterFromIPTIP(entry.IP) if err != nil { nflog("bad iptip: %v", err) return nil, syserr.ErrInvalidArgument } - // TODO(gvisor.dev/issue/170): Matchers and targets can specify - // that they only work for certain protocols, hooks, tables. // Get matchers. matchersSize := entry.TargetOffset - linux.SizeOfIPTEntry if len(optVal) < int(matchersSize) { nflog("entry doesn't have enough room for its matchers (only %d bytes remain)", len(optVal)) return nil, syserr.ErrInvalidArgument } - matchers, err := parseMatchers(filter, optVal[:matchersSize]) + matchers, err := parseMatchers(task, filter, optVal[:matchersSize]) if err != nil { nflog("failed to parse matchers: %v", err) return nil, syserr.ErrInvalidArgument diff --git a/pkg/sentry/socket/netfilter/ipv6.go b/pkg/sentry/socket/netfilter/ipv6.go index 5cb7fe4aa..c68230847 100644 --- a/pkg/sentry/socket/netfilter/ipv6.go +++ b/pkg/sentry/socket/netfilter/ipv6.go @@ -18,6 +18,7 @@ import ( "fmt" "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/syserr" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/header" @@ -126,7 +127,7 @@ func getEntries6(table stack.Table, tablename linux.TableName) (linux.KernelIP6T return entries, info } -func modifyEntries6(stk *stack.Stack, optVal []byte, replace *linux.IPTReplace, table *stack.Table) (map[uint32]int, *syserr.Error) { +func modifyEntries6(task *kernel.Task, stk *stack.Stack, optVal []byte, replace *linux.IPTReplace, table *stack.Table) (map[uint32]int, *syserr.Error) { nflog("set entries: setting entries in table %q", replace.Name.String()) // Convert input into a list of rules and their offsets. @@ -151,23 +152,19 @@ func modifyEntries6(stk *stack.Stack, optVal []byte, replace *linux.IPTReplace, return nil, syserr.ErrInvalidArgument } - // TODO(gvisor.dev/issue/170): We should support more IPTIP - // filtering fields. filter, err := filterFromIP6TIP(entry.IPv6) if err != nil { nflog("bad iptip: %v", err) return nil, syserr.ErrInvalidArgument } - // TODO(gvisor.dev/issue/170): Matchers and targets can specify - // that they only work for certain protocols, hooks, tables. // Get matchers. matchersSize := entry.TargetOffset - linux.SizeOfIP6TEntry if len(optVal) < int(matchersSize) { nflog("entry doesn't have enough room for its matchers (only %d bytes remain)", len(optVal)) return nil, syserr.ErrInvalidArgument } - matchers, err := parseMatchers(filter, optVal[:matchersSize]) + matchers, err := parseMatchers(task, filter, optVal[:matchersSize]) if err != nil { nflog("failed to parse matchers: %v", err) return nil, syserr.ErrInvalidArgument diff --git a/pkg/sentry/socket/netfilter/netfilter.go b/pkg/sentry/socket/netfilter/netfilter.go index f42d73178..e3eade180 100644 --- a/pkg/sentry/socket/netfilter/netfilter.go +++ b/pkg/sentry/socket/netfilter/netfilter.go @@ -58,8 +58,8 @@ var nameToID = map[string]stack.TableID{ // DefaultLinuxTables returns the rules of stack.DefaultTables() wrapped for // compatibility with netfilter extensions. -func DefaultLinuxTables() *stack.IPTables { - tables := stack.DefaultTables() +func DefaultLinuxTables(seed uint32) *stack.IPTables { + tables := stack.DefaultTables(seed) tables.VisitTargets(func(oldTarget stack.Target) stack.Target { switch val := oldTarget.(type) { case *stack.AcceptTarget: @@ -174,13 +174,12 @@ func setHooksAndUnderflow(info *linux.IPTGetinfo, table stack.Table, offset uint // SetEntries sets iptables rules for a single table. See // net/ipv4/netfilter/ip_tables.c:translate_table for reference. -func SetEntries(stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error { +func SetEntries(task *kernel.Task, stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error { var replace linux.IPTReplace replaceBuf := optVal[:linux.SizeOfIPTReplace] optVal = optVal[linux.SizeOfIPTReplace:] replace.UnmarshalBytes(replaceBuf) - // TODO(gvisor.dev/issue/170): Support other tables. var table stack.Table switch replace.Name.String() { case filterTable: @@ -188,16 +187,16 @@ func SetEntries(stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error { case natTable: table = stack.EmptyNATTable() default: - nflog("we don't yet support writing to the %q table (gvisor.dev/issue/170)", replace.Name.String()) + nflog("unknown iptables table %q", replace.Name.String()) return syserr.ErrInvalidArgument } var err *syserr.Error var offsets map[uint32]int if ipv6 { - offsets, err = modifyEntries6(stk, optVal, &replace, &table) + offsets, err = modifyEntries6(task, stk, optVal, &replace, &table) } else { - offsets, err = modifyEntries4(stk, optVal, &replace, &table) + offsets, err = modifyEntries4(task, stk, optVal, &replace, &table) } if err != nil { return err @@ -272,7 +271,6 @@ func SetEntries(stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error { table.Rules[ruleIdx] = rule } - // TODO(gvisor.dev/issue/170): Support other chains. // Since we don't support FORWARD, yet, make sure all other chains point to // ACCEPT rules. for hook, ruleIdx := range table.BuiltinChains { @@ -287,7 +285,7 @@ func SetEntries(stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error { } } - // TODO(gvisor.dev/issue/170): Check the following conditions: + // TODO(gvisor.dev/issue/6167): Check the following conditions: // - There are no loops. // - There are no chains without an unconditional final rule. // - There are no chains without an unconditional underflow rule. @@ -297,7 +295,7 @@ func SetEntries(stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error { // parseMatchers parses 0 or more matchers from optVal. optVal should contain // only the matchers. -func parseMatchers(filter stack.IPHeaderFilter, optVal []byte) ([]stack.Matcher, error) { +func parseMatchers(task *kernel.Task, filter stack.IPHeaderFilter, optVal []byte) ([]stack.Matcher, error) { nflog("set entries: parsing matchers of size %d", len(optVal)) var matchers []stack.Matcher for len(optVal) > 0 { @@ -321,13 +319,13 @@ func parseMatchers(filter stack.IPHeaderFilter, optVal []byte) ([]stack.Matcher, } // Parse the specific matcher. - matcher, err := unmarshalMatcher(match, filter, optVal[linux.SizeOfXTEntryMatch:match.MatchSize]) + matcher, err := unmarshalMatcher(task, match, filter, optVal[linux.SizeOfXTEntryMatch:match.MatchSize]) if err != nil { return nil, fmt.Errorf("failed to create matcher: %v", err) } matchers = append(matchers, matcher) - // TODO(gvisor.dev/issue/170): Check the revision field. + // TODO(gvisor.dev/issue/6167): Check the revision field. optVal = optVal[match.MatchSize:] } diff --git a/pkg/sentry/socket/netfilter/owner_matcher.go b/pkg/sentry/socket/netfilter/owner_matcher.go index 60845cab3..6eff2ae65 100644 --- a/pkg/sentry/socket/netfilter/owner_matcher.go +++ b/pkg/sentry/socket/netfilter/owner_matcher.go @@ -19,6 +19,8 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/marshal" + "gvisor.dev/gvisor/pkg/sentry/kernel" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" "gvisor.dev/gvisor/pkg/tcpip/stack" ) @@ -40,8 +42,8 @@ func (ownerMarshaler) name() string { func (ownerMarshaler) marshal(mr matcher) []byte { matcher := mr.(*OwnerMatcher) iptOwnerInfo := linux.IPTOwnerInfo{ - UID: matcher.uid, - GID: matcher.gid, + UID: uint32(matcher.uid), + GID: uint32(matcher.gid), } // Support for UID and GID match. @@ -63,7 +65,7 @@ func (ownerMarshaler) marshal(mr matcher) []byte { } // unmarshal implements matchMaker.unmarshal. -func (ownerMarshaler) unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) { +func (ownerMarshaler) unmarshal(task *kernel.Task, buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) { if len(buf) < linux.SizeOfIPTOwnerInfo { return nil, fmt.Errorf("buf has insufficient size for owner match: %d", len(buf)) } @@ -72,11 +74,12 @@ func (ownerMarshaler) unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack. // exceed what's strictly necessary to hold matchData. var matchData linux.IPTOwnerInfo matchData.UnmarshalUnsafe(buf[:linux.SizeOfIPTOwnerInfo]) - nflog("parseMatchers: parsed IPTOwnerInfo: %+v", matchData) + nflog("parsed IPTOwnerInfo: %+v", matchData) var owner OwnerMatcher - owner.uid = matchData.UID - owner.gid = matchData.GID + creds := task.Credentials() + owner.uid = creds.UserNamespace.MapToKUID(auth.UID(matchData.UID)) + owner.gid = creds.UserNamespace.MapToKGID(auth.GID(matchData.GID)) // Check flags. if matchData.Match&linux.XT_OWNER_UID != 0 { @@ -97,8 +100,8 @@ func (ownerMarshaler) unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack. // OwnerMatcher matches against a UID and/or GID. type OwnerMatcher struct { - uid uint32 - gid uint32 + uid auth.KUID + gid auth.KGID matchUID bool matchGID bool invertUID bool @@ -113,7 +116,6 @@ func (*OwnerMatcher) name() string { // Match implements Matcher.Match. func (om *OwnerMatcher) Match(hook stack.Hook, pkt *stack.PacketBuffer, _, _ string) (bool, bool) { // Support only for OUTPUT chain. - // TODO(gvisor.dev/issue/170): Need to support for POSTROUTING chain also. if hook != stack.Output { return false, true } @@ -126,7 +128,7 @@ func (om *OwnerMatcher) Match(hook stack.Hook, pkt *stack.PacketBuffer, _, _ str var matches bool // Check for UID match. if om.matchUID { - if pkt.Owner.UID() == om.uid { + if auth.KUID(pkt.Owner.KUID()) == om.uid { matches = true } if matches == om.invertUID { @@ -137,7 +139,7 @@ func (om *OwnerMatcher) Match(hook stack.Hook, pkt *stack.PacketBuffer, _, _ str // Check for GID match. if om.matchGID { matches = false - if pkt.Owner.GID() == om.gid { + if auth.KGID(pkt.Owner.KGID()) == om.gid { matches = true } if matches == om.invertGID { diff --git a/pkg/sentry/socket/netfilter/targets.go b/pkg/sentry/socket/netfilter/targets.go index fa5456eee..7d83e708f 100644 --- a/pkg/sentry/socket/netfilter/targets.go +++ b/pkg/sentry/socket/netfilter/targets.go @@ -331,7 +331,6 @@ func (*redirectTargetMaker) unmarshal(buf []byte, filter stack.IPHeaderFilter) ( return nil, syserr.ErrInvalidArgument } - // TODO(gvisor.dev/issue/170): Check if the flags are valid. // Also check if we need to map ports or IP. // For now, redirect target only supports destination port change. // Port range and IP range are not supported yet. @@ -340,7 +339,6 @@ func (*redirectTargetMaker) unmarshal(buf []byte, filter stack.IPHeaderFilter) ( return nil, syserr.ErrInvalidArgument } - // TODO(gvisor.dev/issue/170): Port range is not supported yet. if nfRange.RangeIPV4.MinPort != nfRange.RangeIPV4.MaxPort { nflog("redirectTargetMaker: MinPort != MaxPort (%d, %d)", nfRange.RangeIPV4.MinPort, nfRange.RangeIPV4.MaxPort) return nil, syserr.ErrInvalidArgument @@ -502,7 +500,6 @@ func (*snatTargetMakerV4) unmarshal(buf []byte, filter stack.IPHeaderFilter) (ta return nil, syserr.ErrInvalidArgument } - // TODO(gvisor.dev/issue/170): Port range is not supported yet. if nfRange.RangeIPV4.MinPort != nfRange.RangeIPV4.MaxPort { nflog("snatTargetMakerV4: MinPort != MaxPort (%d, %d)", nfRange.RangeIPV4.MinPort, nfRange.RangeIPV4.MaxPort) return nil, syserr.ErrInvalidArgument @@ -594,7 +591,6 @@ func (*snatTargetMakerV6) unmarshal(buf []byte, filter stack.IPHeaderFilter) (ta // translateToStandardTarget translates from the value in a // linux.XTStandardTarget to an stack.Verdict. func translateToStandardTarget(val int32, netProto tcpip.NetworkProtocolNumber) (target, *syserr.Error) { - // TODO(gvisor.dev/issue/170): Support other verdicts. switch val { case -linux.NF_ACCEPT - 1: return &acceptTarget{stack.AcceptTarget{ diff --git a/pkg/sentry/socket/netfilter/tcp_matcher.go b/pkg/sentry/socket/netfilter/tcp_matcher.go index 95bb9826e..e5b73a976 100644 --- a/pkg/sentry/socket/netfilter/tcp_matcher.go +++ b/pkg/sentry/socket/netfilter/tcp_matcher.go @@ -19,6 +19,7 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/marshal" + "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/pkg/tcpip/stack" ) @@ -50,7 +51,7 @@ func (tcpMarshaler) marshal(mr matcher) []byte { } // unmarshal implements matchMaker.unmarshal. -func (tcpMarshaler) unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) { +func (tcpMarshaler) unmarshal(_ *kernel.Task, buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) { if len(buf) < linux.SizeOfXTTCP { return nil, fmt.Errorf("buf has insufficient size for TCP match: %d", len(buf)) } @@ -95,8 +96,6 @@ func (*TCPMatcher) name() string { // Match implements Matcher.Match. func (tm *TCPMatcher) Match(hook stack.Hook, pkt *stack.PacketBuffer, _, _ string) (bool, bool) { - // TODO(gvisor.dev/issue/170): Proto checks should ultimately be moved - // into the stack.Check codepath as matchers are added. switch pkt.NetworkProtocolNumber { case header.IPv4ProtocolNumber: netHeader := header.IPv4(pkt.NetworkHeader().View()) diff --git a/pkg/sentry/socket/netfilter/udp_matcher.go b/pkg/sentry/socket/netfilter/udp_matcher.go index fb8be27e6..aa72ee70c 100644 --- a/pkg/sentry/socket/netfilter/udp_matcher.go +++ b/pkg/sentry/socket/netfilter/udp_matcher.go @@ -19,6 +19,7 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/marshal" + "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/pkg/tcpip/stack" ) @@ -50,7 +51,7 @@ func (udpMarshaler) marshal(mr matcher) []byte { } // unmarshal implements matchMaker.unmarshal. -func (udpMarshaler) unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) { +func (udpMarshaler) unmarshal(_ *kernel.Task, buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) { if len(buf) < linux.SizeOfXTUDP { return nil, fmt.Errorf("buf has insufficient size for UDP match: %d", len(buf)) } @@ -92,8 +93,6 @@ func (*UDPMatcher) name() string { // Match implements Matcher.Match. func (um *UDPMatcher) Match(hook stack.Hook, pkt *stack.PacketBuffer, _, _ string) (bool, bool) { - // TODO(gvisor.dev/issue/170): Proto checks should ultimately be moved - // into the stack.Check codepath as matchers are added. switch pkt.NetworkProtocolNumber { case header.IPv4ProtocolNumber: netHeader := header.IPv4(pkt.NetworkHeader().View()) diff --git a/pkg/sentry/socket/netstack/netstack.go b/pkg/sentry/socket/netstack/netstack.go index 0b64a24c3..11ba80497 100644 --- a/pkg/sentry/socket/netstack/netstack.go +++ b/pkg/sentry/socket/netstack/netstack.go @@ -77,41 +77,59 @@ func mustCreateGauge(name, description string) *tcpip.StatCounter { // Metrics contains metrics exported by netstack. var Metrics = tcpip.Stats{ - UnknownProtocolRcvdPackets: mustCreateMetric("/netstack/unknown_protocol_received_packets", "Number of packets received by netstack that were for an unknown or unsupported protocol."), - MalformedRcvdPackets: mustCreateMetric("/netstack/malformed_received_packets", "Number of packets received by netstack that were deemed malformed."), - DroppedPackets: mustCreateMetric("/netstack/dropped_packets", "Number of packets dropped by netstack due to full queues."), + DroppedPackets: mustCreateMetric("/netstack/dropped_packets", "Number of packets dropped at the transport layer."), + NICs: tcpip.NICStats{ + UnknownL3ProtocolRcvdPackets: mustCreateMetric("/netstack/nic/unknown_l3_protocol_received_packets", "Number of packets received that were for an unknown or unsupported L3 protocol."), + UnknownL4ProtocolRcvdPackets: mustCreateMetric("/netstack/nic/unknown_l4_protocol_received_packets", "Number of packets received that were for an unknown or unsupported L4 protocol."), + MalformedL4RcvdPackets: mustCreateMetric("/netstack/nic/malformed_l4_received_packets", "Number of packets received that failed L4 header parsing."), + Tx: tcpip.NICPacketStats{ + Packets: mustCreateMetric("/netstack/nic/tx/packets", "Number of packets transmitted."), + Bytes: mustCreateMetric("/netstack/nic/tx/bytes", "Number of bytes transmitted."), + }, + Rx: tcpip.NICPacketStats{ + Packets: mustCreateMetric("/netstack/nic/rx/packets", "Number of packets received."), + Bytes: mustCreateMetric("/netstack/nic/rx/bytes", "Number of bytes received."), + }, + DisabledRx: tcpip.NICPacketStats{ + Packets: mustCreateMetric("/netstack/nic/disabled_rx/packets", "Number of packets received on disabled NICs."), + Bytes: mustCreateMetric("/netstack/nic/disabled_rx/bytes", "Number of bytes received on disabled NICs."), + }, + Neighbor: tcpip.NICNeighborStats{ + UnreachableEntryLookups: mustCreateMetric("/netstack/nic/neighbor/unreachable_entry_loopups", "Number of lookups performed on a neighbor entry in Unreachable state."), + }, + }, ICMP: tcpip.ICMPStats{ V4: tcpip.ICMPv4Stats{ PacketsSent: tcpip.ICMPv4SentPacketStats{ ICMPv4PacketStats: tcpip.ICMPv4PacketStats{ - EchoRequest: mustCreateMetric("/netstack/icmp/v4/packets_sent/echo_request", "Number of ICMPv4 echo request packets sent by netstack."), - EchoReply: mustCreateMetric("/netstack/icmp/v4/packets_sent/echo_reply", "Number of ICMPv4 echo reply packets sent by netstack."), - DstUnreachable: mustCreateMetric("/netstack/icmp/v4/packets_sent/dst_unreachable", "Number of ICMPv4 destination unreachable packets sent by netstack."), - SrcQuench: mustCreateMetric("/netstack/icmp/v4/packets_sent/src_quench", "Number of ICMPv4 source quench packets sent by netstack."), - Redirect: mustCreateMetric("/netstack/icmp/v4/packets_sent/redirect", "Number of ICMPv4 redirect packets sent by netstack."), - TimeExceeded: mustCreateMetric("/netstack/icmp/v4/packets_sent/time_exceeded", "Number of ICMPv4 time exceeded packets sent by netstack."), - ParamProblem: mustCreateMetric("/netstack/icmp/v4/packets_sent/param_problem", "Number of ICMPv4 parameter problem packets sent by netstack."), - Timestamp: mustCreateMetric("/netstack/icmp/v4/packets_sent/timestamp", "Number of ICMPv4 timestamp packets sent by netstack."), - TimestampReply: mustCreateMetric("/netstack/icmp/v4/packets_sent/timestamp_reply", "Number of ICMPv4 timestamp reply packets sent by netstack."), - InfoRequest: mustCreateMetric("/netstack/icmp/v4/packets_sent/info_request", "Number of ICMPv4 information request packets sent by netstack."), - InfoReply: mustCreateMetric("/netstack/icmp/v4/packets_sent/info_reply", "Number of ICMPv4 information reply packets sent by netstack."), + EchoRequest: mustCreateMetric("/netstack/icmp/v4/packets_sent/echo_request", "Number of ICMPv4 echo request packets sent."), + EchoReply: mustCreateMetric("/netstack/icmp/v4/packets_sent/echo_reply", "Number of ICMPv4 echo reply packets sent."), + DstUnreachable: mustCreateMetric("/netstack/icmp/v4/packets_sent/dst_unreachable", "Number of ICMPv4 destination unreachable packets sent."), + SrcQuench: mustCreateMetric("/netstack/icmp/v4/packets_sent/src_quench", "Number of ICMPv4 source quench packets sent."), + Redirect: mustCreateMetric("/netstack/icmp/v4/packets_sent/redirect", "Number of ICMPv4 redirect packets sent."), + TimeExceeded: mustCreateMetric("/netstack/icmp/v4/packets_sent/time_exceeded", "Number of ICMPv4 time exceeded packets sent."), + ParamProblem: mustCreateMetric("/netstack/icmp/v4/packets_sent/param_problem", "Number of ICMPv4 parameter problem packets sent."), + Timestamp: mustCreateMetric("/netstack/icmp/v4/packets_sent/timestamp", "Number of ICMPv4 timestamp packets sent."), + TimestampReply: mustCreateMetric("/netstack/icmp/v4/packets_sent/timestamp_reply", "Number of ICMPv4 timestamp reply packets sent."), + InfoRequest: mustCreateMetric("/netstack/icmp/v4/packets_sent/info_request", "Number of ICMPv4 information request packets sent."), + InfoReply: mustCreateMetric("/netstack/icmp/v4/packets_sent/info_reply", "Number of ICMPv4 information reply packets sent."), }, - Dropped: mustCreateMetric("/netstack/icmp/v4/packets_sent/dropped", "Number of ICMPv4 packets dropped by netstack due to link layer errors."), - RateLimited: mustCreateMetric("/netstack/icmp/v4/packets_sent/rate_limited", "Number of ICMPv4 packets dropped by netstack due to rate limit being exceeded."), + Dropped: mustCreateMetric("/netstack/icmp/v4/packets_sent/dropped", "Number of ICMPv4 packets dropped due to link layer errors."), + RateLimited: mustCreateMetric("/netstack/icmp/v4/packets_sent/rate_limited", "Number of ICMPv4 packets dropped due to rate limit being exceeded."), }, PacketsReceived: tcpip.ICMPv4ReceivedPacketStats{ ICMPv4PacketStats: tcpip.ICMPv4PacketStats{ - EchoRequest: mustCreateMetric("/netstack/icmp/v4/packets_received/echo_request", "Number of ICMPv4 echo request packets received by netstack."), - EchoReply: mustCreateMetric("/netstack/icmp/v4/packets_received/echo_reply", "Number of ICMPv4 echo reply packets received by netstack."), - DstUnreachable: mustCreateMetric("/netstack/icmp/v4/packets_received/dst_unreachable", "Number of ICMPv4 destination unreachable packets received by netstack."), - SrcQuench: mustCreateMetric("/netstack/icmp/v4/packets_received/src_quench", "Number of ICMPv4 source quench packets received by netstack."), - Redirect: mustCreateMetric("/netstack/icmp/v4/packets_received/redirect", "Number of ICMPv4 redirect packets received by netstack."), - TimeExceeded: mustCreateMetric("/netstack/icmp/v4/packets_received/time_exceeded", "Number of ICMPv4 time exceeded packets received by netstack."), - ParamProblem: mustCreateMetric("/netstack/icmp/v4/packets_received/param_problem", "Number of ICMPv4 parameter problem packets received by netstack."), - Timestamp: mustCreateMetric("/netstack/icmp/v4/packets_received/timestamp", "Number of ICMPv4 timestamp packets received by netstack."), - TimestampReply: mustCreateMetric("/netstack/icmp/v4/packets_received/timestamp_reply", "Number of ICMPv4 timestamp reply packets received by netstack."), - InfoRequest: mustCreateMetric("/netstack/icmp/v4/packets_received/info_request", "Number of ICMPv4 information request packets received by netstack."), - InfoReply: mustCreateMetric("/netstack/icmp/v4/packets_received/info_reply", "Number of ICMPv4 information reply packets received by netstack."), + EchoRequest: mustCreateMetric("/netstack/icmp/v4/packets_received/echo_request", "Number of ICMPv4 echo request packets received."), + EchoReply: mustCreateMetric("/netstack/icmp/v4/packets_received/echo_reply", "Number of ICMPv4 echo reply packets received."), + DstUnreachable: mustCreateMetric("/netstack/icmp/v4/packets_received/dst_unreachable", "Number of ICMPv4 destination unreachable packets received."), + SrcQuench: mustCreateMetric("/netstack/icmp/v4/packets_received/src_quench", "Number of ICMPv4 source quench packets received."), + Redirect: mustCreateMetric("/netstack/icmp/v4/packets_received/redirect", "Number of ICMPv4 redirect packets received."), + TimeExceeded: mustCreateMetric("/netstack/icmp/v4/packets_received/time_exceeded", "Number of ICMPv4 time exceeded packets received."), + ParamProblem: mustCreateMetric("/netstack/icmp/v4/packets_received/param_problem", "Number of ICMPv4 parameter problem packets received."), + Timestamp: mustCreateMetric("/netstack/icmp/v4/packets_received/timestamp", "Number of ICMPv4 timestamp packets received."), + TimestampReply: mustCreateMetric("/netstack/icmp/v4/packets_received/timestamp_reply", "Number of ICMPv4 timestamp reply packets received."), + InfoRequest: mustCreateMetric("/netstack/icmp/v4/packets_received/info_request", "Number of ICMPv4 information request packets received."), + InfoReply: mustCreateMetric("/netstack/icmp/v4/packets_received/info_reply", "Number of ICMPv4 information reply packets received."), }, Invalid: mustCreateMetric("/netstack/icmp/v4/packets_received/invalid", "Number of ICMPv4 packets received that the transport layer could not parse."), }, @@ -119,40 +137,40 @@ var Metrics = tcpip.Stats{ V6: tcpip.ICMPv6Stats{ PacketsSent: tcpip.ICMPv6SentPacketStats{ ICMPv6PacketStats: tcpip.ICMPv6PacketStats{ - EchoRequest: mustCreateMetric("/netstack/icmp/v6/packets_sent/echo_request", "Number of ICMPv6 echo request packets sent by netstack."), - EchoReply: mustCreateMetric("/netstack/icmp/v6/packets_sent/echo_reply", "Number of ICMPv6 echo reply packets sent by netstack."), - DstUnreachable: mustCreateMetric("/netstack/icmp/v6/packets_sent/dst_unreachable", "Number of ICMPv6 destination unreachable packets sent by netstack."), - PacketTooBig: mustCreateMetric("/netstack/icmp/v6/packets_sent/packet_too_big", "Number of ICMPv6 packet too big packets sent by netstack."), - TimeExceeded: mustCreateMetric("/netstack/icmp/v6/packets_sent/time_exceeded", "Number of ICMPv6 time exceeded packets sent by netstack."), - ParamProblem: mustCreateMetric("/netstack/icmp/v6/packets_sent/param_problem", "Number of ICMPv6 parameter problem packets sent by netstack."), - RouterSolicit: mustCreateMetric("/netstack/icmp/v6/packets_sent/router_solicit", "Number of ICMPv6 router solicit packets sent by netstack."), - RouterAdvert: mustCreateMetric("/netstack/icmp/v6/packets_sent/router_advert", "Number of ICMPv6 router advert packets sent by netstack."), - NeighborSolicit: mustCreateMetric("/netstack/icmp/v6/packets_sent/neighbor_solicit", "Number of ICMPv6 neighbor solicit packets sent by netstack."), - NeighborAdvert: mustCreateMetric("/netstack/icmp/v6/packets_sent/neighbor_advert", "Number of ICMPv6 neighbor advert packets sent by netstack."), - RedirectMsg: mustCreateMetric("/netstack/icmp/v6/packets_sent/redirect_msg", "Number of ICMPv6 redirect message packets sent by netstack."), - MulticastListenerQuery: mustCreateMetric("/netstack/icmp/v6/packets_sent/multicast_listener_query", "Number of ICMPv6 multicast listener query packets sent by netstack."), - MulticastListenerReport: mustCreateMetric("/netstack/icmp/v6/packets_sent/multicast_listener_report", "Number of ICMPv6 multicast listener report packets sent by netstack."), - MulticastListenerDone: mustCreateMetric("/netstack/icmp/v6/packets_sent/multicast_listener_done", "Number of ICMPv6 multicast listener done packets sent by netstack."), + EchoRequest: mustCreateMetric("/netstack/icmp/v6/packets_sent/echo_request", "Number of ICMPv6 echo request packets sent."), + EchoReply: mustCreateMetric("/netstack/icmp/v6/packets_sent/echo_reply", "Number of ICMPv6 echo reply packets sent."), + DstUnreachable: mustCreateMetric("/netstack/icmp/v6/packets_sent/dst_unreachable", "Number of ICMPv6 destination unreachable packets sent."), + PacketTooBig: mustCreateMetric("/netstack/icmp/v6/packets_sent/packet_too_big", "Number of ICMPv6 packet too big packets sent."), + TimeExceeded: mustCreateMetric("/netstack/icmp/v6/packets_sent/time_exceeded", "Number of ICMPv6 time exceeded packets sent."), + ParamProblem: mustCreateMetric("/netstack/icmp/v6/packets_sent/param_problem", "Number of ICMPv6 parameter problem packets sent."), + RouterSolicit: mustCreateMetric("/netstack/icmp/v6/packets_sent/router_solicit", "Number of ICMPv6 router solicit packets sent."), + RouterAdvert: mustCreateMetric("/netstack/icmp/v6/packets_sent/router_advert", "Number of ICMPv6 router advert packets sent."), + NeighborSolicit: mustCreateMetric("/netstack/icmp/v6/packets_sent/neighbor_solicit", "Number of ICMPv6 neighbor solicit packets sent."), + NeighborAdvert: mustCreateMetric("/netstack/icmp/v6/packets_sent/neighbor_advert", "Number of ICMPv6 neighbor advert packets sent."), + RedirectMsg: mustCreateMetric("/netstack/icmp/v6/packets_sent/redirect_msg", "Number of ICMPv6 redirect message packets sent."), + MulticastListenerQuery: mustCreateMetric("/netstack/icmp/v6/packets_sent/multicast_listener_query", "Number of ICMPv6 multicast listener query packets sent."), + MulticastListenerReport: mustCreateMetric("/netstack/icmp/v6/packets_sent/multicast_listener_report", "Number of ICMPv6 multicast listener report packets sent."), + MulticastListenerDone: mustCreateMetric("/netstack/icmp/v6/packets_sent/multicast_listener_done", "Number of ICMPv6 multicast listener done packets sent."), }, - Dropped: mustCreateMetric("/netstack/icmp/v6/packets_sent/dropped", "Number of ICMPv6 packets dropped by netstack due to link layer errors."), - RateLimited: mustCreateMetric("/netstack/icmp/v6/packets_sent/rate_limited", "Number of ICMPv6 packets dropped by netstack due to rate limit being exceeded."), + Dropped: mustCreateMetric("/netstack/icmp/v6/packets_sent/dropped", "Number of ICMPv6 packets dropped due to link layer errors."), + RateLimited: mustCreateMetric("/netstack/icmp/v6/packets_sent/rate_limited", "Number of ICMPv6 packets dropped due to rate limit being exceeded."), }, PacketsReceived: tcpip.ICMPv6ReceivedPacketStats{ ICMPv6PacketStats: tcpip.ICMPv6PacketStats{ - EchoRequest: mustCreateMetric("/netstack/icmp/v6/packets_received/echo_request", "Number of ICMPv6 echo request packets received by netstack."), - EchoReply: mustCreateMetric("/netstack/icmp/v6/packets_received/echo_reply", "Number of ICMPv6 echo reply packets received by netstack."), - DstUnreachable: mustCreateMetric("/netstack/icmp/v6/packets_received/dst_unreachable", "Number of ICMPv6 destination unreachable packets received by netstack."), - PacketTooBig: mustCreateMetric("/netstack/icmp/v6/packets_received/packet_too_big", "Number of ICMPv6 packet too big packets received by netstack."), - TimeExceeded: mustCreateMetric("/netstack/icmp/v6/packets_received/time_exceeded", "Number of ICMPv6 time exceeded packets received by netstack."), - ParamProblem: mustCreateMetric("/netstack/icmp/v6/packets_received/param_problem", "Number of ICMPv6 parameter problem packets received by netstack."), - RouterSolicit: mustCreateMetric("/netstack/icmp/v6/packets_received/router_solicit", "Number of ICMPv6 router solicit packets received by netstack."), - RouterAdvert: mustCreateMetric("/netstack/icmp/v6/packets_received/router_advert", "Number of ICMPv6 router advert packets received by netstack."), - NeighborSolicit: mustCreateMetric("/netstack/icmp/v6/packets_received/neighbor_solicit", "Number of ICMPv6 neighbor solicit packets received by netstack."), - NeighborAdvert: mustCreateMetric("/netstack/icmp/v6/packets_received/neighbor_advert", "Number of ICMPv6 neighbor advert packets received by netstack."), - RedirectMsg: mustCreateMetric("/netstack/icmp/v6/packets_received/redirect_msg", "Number of ICMPv6 redirect message packets received by netstack."), - MulticastListenerQuery: mustCreateMetric("/netstack/icmp/v6/packets_received/multicast_listener_query", "Number of ICMPv6 multicast listener query packets received by netstack."), - MulticastListenerReport: mustCreateMetric("/netstack/icmp/v6/packets_received/multicast_listener_report", "Number of ICMPv6 multicast listener report packets sent by netstack."), - MulticastListenerDone: mustCreateMetric("/netstack/icmp/v6/packets_received/multicast_listener_done", "Number of ICMPv6 multicast listener done packets sent by netstack."), + EchoRequest: mustCreateMetric("/netstack/icmp/v6/packets_received/echo_request", "Number of ICMPv6 echo request packets received."), + EchoReply: mustCreateMetric("/netstack/icmp/v6/packets_received/echo_reply", "Number of ICMPv6 echo reply packets received."), + DstUnreachable: mustCreateMetric("/netstack/icmp/v6/packets_received/dst_unreachable", "Number of ICMPv6 destination unreachable packets received."), + PacketTooBig: mustCreateMetric("/netstack/icmp/v6/packets_received/packet_too_big", "Number of ICMPv6 packet too big packets received."), + TimeExceeded: mustCreateMetric("/netstack/icmp/v6/packets_received/time_exceeded", "Number of ICMPv6 time exceeded packets received."), + ParamProblem: mustCreateMetric("/netstack/icmp/v6/packets_received/param_problem", "Number of ICMPv6 parameter problem packets received."), + RouterSolicit: mustCreateMetric("/netstack/icmp/v6/packets_received/router_solicit", "Number of ICMPv6 router solicit packets received."), + RouterAdvert: mustCreateMetric("/netstack/icmp/v6/packets_received/router_advert", "Number of ICMPv6 router advert packets received."), + NeighborSolicit: mustCreateMetric("/netstack/icmp/v6/packets_received/neighbor_solicit", "Number of ICMPv6 neighbor solicit packets received."), + NeighborAdvert: mustCreateMetric("/netstack/icmp/v6/packets_received/neighbor_advert", "Number of ICMPv6 neighbor advert packets received."), + RedirectMsg: mustCreateMetric("/netstack/icmp/v6/packets_received/redirect_msg", "Number of ICMPv6 redirect message packets received."), + MulticastListenerQuery: mustCreateMetric("/netstack/icmp/v6/packets_received/multicast_listener_query", "Number of ICMPv6 multicast listener query packets received."), + MulticastListenerReport: mustCreateMetric("/netstack/icmp/v6/packets_received/multicast_listener_report", "Number of ICMPv6 multicast listener report packets sent."), + MulticastListenerDone: mustCreateMetric("/netstack/icmp/v6/packets_received/multicast_listener_done", "Number of ICMPv6 multicast listener done packets sent."), }, Unrecognized: mustCreateMetric("/netstack/icmp/v6/packets_received/unrecognized", "Number of ICMPv6 packets received that the transport layer does not know how to parse."), Invalid: mustCreateMetric("/netstack/icmp/v6/packets_received/invalid", "Number of ICMPv6 packets received that the transport layer could not parse."), @@ -163,23 +181,23 @@ var Metrics = tcpip.Stats{ IGMP: tcpip.IGMPStats{ PacketsSent: tcpip.IGMPSentPacketStats{ IGMPPacketStats: tcpip.IGMPPacketStats{ - MembershipQuery: mustCreateMetric("/netstack/igmp/packets_sent/membership_query", "Number of IGMP Membership Query messages sent by netstack."), - V1MembershipReport: mustCreateMetric("/netstack/igmp/packets_sent/v1_membership_report", "Number of IGMPv1 Membership Report messages sent by netstack."), - V2MembershipReport: mustCreateMetric("/netstack/igmp/packets_sent/v2_membership_report", "Number of IGMPv2 Membership Report messages sent by netstack."), - LeaveGroup: mustCreateMetric("/netstack/igmp/packets_sent/leave_group", "Number of IGMP Leave Group messages sent by netstack."), + MembershipQuery: mustCreateMetric("/netstack/igmp/packets_sent/membership_query", "Number of IGMP Membership Query messages sent."), + V1MembershipReport: mustCreateMetric("/netstack/igmp/packets_sent/v1_membership_report", "Number of IGMPv1 Membership Report messages sent."), + V2MembershipReport: mustCreateMetric("/netstack/igmp/packets_sent/v2_membership_report", "Number of IGMPv2 Membership Report messages sent."), + LeaveGroup: mustCreateMetric("/netstack/igmp/packets_sent/leave_group", "Number of IGMP Leave Group messages sent."), }, - Dropped: mustCreateMetric("/netstack/igmp/packets_sent/dropped", "Number of IGMP packets dropped by netstack due to link layer errors."), + Dropped: mustCreateMetric("/netstack/igmp/packets_sent/dropped", "Number of IGMP packets dropped due to link layer errors."), }, PacketsReceived: tcpip.IGMPReceivedPacketStats{ IGMPPacketStats: tcpip.IGMPPacketStats{ - MembershipQuery: mustCreateMetric("/netstack/igmp/packets_received/membership_query", "Number of IGMP Membership Query messages received by netstack."), - V1MembershipReport: mustCreateMetric("/netstack/igmp/packets_received/v1_membership_report", "Number of IGMPv1 Membership Report messages received by netstack."), - V2MembershipReport: mustCreateMetric("/netstack/igmp/packets_received/v2_membership_report", "Number of IGMPv2 Membership Report messages received by netstack."), - LeaveGroup: mustCreateMetric("/netstack/igmp/packets_received/leave_group", "Number of IGMP Leave Group messages received by netstack."), + MembershipQuery: mustCreateMetric("/netstack/igmp/packets_received/membership_query", "Number of IGMP Membership Query messages received."), + V1MembershipReport: mustCreateMetric("/netstack/igmp/packets_received/v1_membership_report", "Number of IGMPv1 Membership Report messages received."), + V2MembershipReport: mustCreateMetric("/netstack/igmp/packets_received/v2_membership_report", "Number of IGMPv2 Membership Report messages received."), + LeaveGroup: mustCreateMetric("/netstack/igmp/packets_received/leave_group", "Number of IGMP Leave Group messages received."), }, - Invalid: mustCreateMetric("/netstack/igmp/packets_received/invalid", "Number of IGMP packets received by netstack that could not be parsed."), + Invalid: mustCreateMetric("/netstack/igmp/packets_received/invalid", "Number of IGMP packets received that could not be parsed."), ChecksumErrors: mustCreateMetric("/netstack/igmp/packets_received/checksum_errors", "Number of received IGMP packets with bad checksums."), - Unrecognized: mustCreateMetric("/netstack/igmp/packets_received/unrecognized", "Number of unrecognized IGMP packets received by netstack."), + Unrecognized: mustCreateMetric("/netstack/igmp/packets_received/unrecognized", "Number of unrecognized IGMP packets received."), }, }, IP: tcpip.IPStats{ @@ -205,7 +223,8 @@ var Metrics = tcpip.Stats{ LinkLocalSource: mustCreateMetric("/netstack/ip/forwarding/link_local_source_address", "Number of IP packets received which could not be forwarded due to a link-local source address."), LinkLocalDestination: mustCreateMetric("/netstack/ip/forwarding/link_local_destination_address", "Number of IP packets received which could not be forwarded due to a link-local destination address."), ExtensionHeaderProblem: mustCreateMetric("/netstack/ip/forwarding/extension_header_problem", "Number of IP packets received which could not be forwarded due to a problem processing their IPv6 extension headers."), - PacketTooBig: mustCreateMetric("/netstack/ip/forwarding/packet_too_big", "Number of IP packets received which could not fit within the outgoing MTU."), + PacketTooBig: mustCreateMetric("/netstack/ip/forwarding/packet_too_big", "Number of IP packets received which could not be forwarded because they could not fit within the outgoing MTU."), + HostUnreachable: mustCreateMetric("/netstack/ip/forwarding/host_unreachable", "Number of IP packets received which could not be forwarded due to unresolvable next hop."), Errors: mustCreateMetric("/netstack/ip/forwarding/errors", "Number of IP packets which couldn't be forwarded."), }, }, @@ -1126,7 +1145,14 @@ func getSockOptTCP(t *kernel.Task, s socket.SocketOps, ep commonEndpoint, name, // TODO(b/64800844): Translate fields once they are added to // tcpip.TCPInfoOption. - info := linux.TCPInfo{} + info := linux.TCPInfo{ + State: uint8(v.State), + RTO: uint32(v.RTO / time.Microsecond), + RTT: uint32(v.RTT / time.Microsecond), + RTTVar: uint32(v.RTTVar / time.Microsecond), + SndSsthresh: v.SndSsthresh, + SndCwnd: v.SndCwnd, + } switch v.CcState { case tcpip.RTORecovery: info.CaState = linux.TCP_CA_Loss @@ -1137,11 +1163,6 @@ func getSockOptTCP(t *kernel.Task, s socket.SocketOps, ep commonEndpoint, name, case tcpip.Open: info.CaState = linux.TCP_CA_Open } - info.RTO = uint32(v.RTO / time.Microsecond) - info.RTT = uint32(v.RTT / time.Microsecond) - info.RTTVar = uint32(v.RTTVar / time.Microsecond) - info.SndSsthresh = v.SndSsthresh - info.SndCwnd = v.SndCwnd // In netstack reorderSeen is updated only when RACK is enabled. // We only track whether the reordering is seen, which is @@ -1777,11 +1798,6 @@ func setSockOptSocket(t *kernel.Task, s socket.SocketOps, ep commonEndpoint, nam } v := hostarch.ByteOrder.Uint32(optVal) - - if v == 0 { - socket.SetSockOptEmitUnimplementedEvent(t, name) - } - ep.SocketOptions().SetOutOfBandInline(v != 0) return nil @@ -2089,10 +2105,10 @@ func setSockOptIPv6(t *kernel.Task, s socket.SocketOps, ep commonEndpoint, name return syserr.ErrNoDevice } // Stack must be a netstack stack. - return netfilter.SetEntries(stack.(*Stack).Stack, optVal, true) + return netfilter.SetEntries(t, stack.(*Stack).Stack, optVal, true) case linux.IP6T_SO_SET_ADD_COUNTERS: - // TODO(gvisor.dev/issue/170): Counter support. + log.Infof("IP6T_SO_SET_ADD_COUNTERS is not supported") return nil default: @@ -2332,10 +2348,10 @@ func setSockOptIP(t *kernel.Task, s socket.SocketOps, ep commonEndpoint, name in return syserr.ErrNoDevice } // Stack must be a netstack stack. - return netfilter.SetEntries(stack.(*Stack).Stack, optVal, false) + return netfilter.SetEntries(t, stack.(*Stack).Stack, optVal, false) case linux.IPT_SO_SET_ADD_COUNTERS: - // TODO(gvisor.dev/issue/170): Counter support. + log.Infof("IPT_SO_SET_ADD_COUNTERS is not supported") return nil case linux.IP_ADD_SOURCE_MEMBERSHIP, diff --git a/pkg/sentry/socket/netstack/stack.go b/pkg/sentry/socket/netstack/stack.go index 9cc1c57d7..eef5e6519 100644 --- a/pkg/sentry/socket/netstack/stack.go +++ b/pkg/sentry/socket/netstack/stack.go @@ -458,16 +458,6 @@ func (s *Stack) RestoreCleanupEndpoints(es []stack.TransportEndpoint) { s.Stack.RestoreCleanupEndpoints(es) } -// Forwarding implements inet.Stack.Forwarding. -func (s *Stack) Forwarding(protocol tcpip.NetworkProtocolNumber) bool { - switch protocol { - case ipv4.ProtocolNumber, ipv6.ProtocolNumber: - return s.Stack.Forwarding(protocol) - default: - panic(fmt.Sprintf("Forwarding(%v) failed: unsupported protocol", protocol)) - } -} - // SetForwarding implements inet.Stack.SetForwarding. func (s *Stack) SetForwarding(protocol tcpip.NetworkProtocolNumber, enable bool) error { if err := s.Stack.SetForwardingDefaultAndAllNICs(protocol, enable); err != nil { diff --git a/pkg/sentry/socket/netstack/tun.go b/pkg/sentry/socket/netstack/tun.go index 288dd0c9e..c7ed52702 100644 --- a/pkg/sentry/socket/netstack/tun.go +++ b/pkg/sentry/socket/netstack/tun.go @@ -40,7 +40,7 @@ func LinuxToTUNFlags(flags uint16) (tun.Flags, error) { // Linux adds IFF_NOFILTER (the same value as IFF_NO_PI unfortunately) // when there is no sk_filter. See __tun_chr_ioctl() in // net/drivers/tun.c. - if flags&^uint16(linux.IFF_TUN|linux.IFF_TAP|linux.IFF_NO_PI) != 0 { + if flags&^uint16(linux.IFF_TUN|linux.IFF_TAP|linux.IFF_NO_PI|linux.IFF_ONE_QUEUE) != 0 { return tun.Flags{}, syserror.EINVAL } return tun.Flags{ diff --git a/pkg/sentry/strace/BUILD b/pkg/sentry/strace/BUILD index 1fbbd133c..369541c7a 100644 --- a/pkg/sentry/strace/BUILD +++ b/pkg/sentry/strace/BUILD @@ -11,6 +11,7 @@ go_library( "futex.go", "linux64_amd64.go", "linux64_arm64.go", + "mmap.go", "open.go", "poll.go", "ptrace.go", @@ -35,7 +36,6 @@ go_library( "//pkg/sentry/socket", "//pkg/sentry/socket/netlink", "//pkg/sentry/syscalls/linux", - "@org_golang_x_sys//unix:go_default_library", ], ) diff --git a/pkg/sentry/strace/clone.go b/pkg/sentry/strace/clone.go index ab1060426..bfb4d7f5c 100644 --- a/pkg/sentry/strace/clone.go +++ b/pkg/sentry/strace/clone.go @@ -15,98 +15,98 @@ package strace import ( - "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" ) // CloneFlagSet is the set of clone(2) flags. var CloneFlagSet = abi.FlagSet{ { - Flag: unix.CLONE_VM, + Flag: linux.CLONE_VM, Name: "CLONE_VM", }, { - Flag: unix.CLONE_FS, + Flag: linux.CLONE_FS, Name: "CLONE_FS", }, { - Flag: unix.CLONE_FILES, + Flag: linux.CLONE_FILES, Name: "CLONE_FILES", }, { - Flag: unix.CLONE_SIGHAND, + Flag: linux.CLONE_SIGHAND, Name: "CLONE_SIGHAND", }, { - Flag: unix.CLONE_PTRACE, + Flag: linux.CLONE_PTRACE, Name: "CLONE_PTRACE", }, { - Flag: unix.CLONE_VFORK, + Flag: linux.CLONE_VFORK, Name: "CLONE_VFORK", }, { - Flag: unix.CLONE_PARENT, + Flag: linux.CLONE_PARENT, Name: "CLONE_PARENT", }, { - Flag: unix.CLONE_THREAD, + Flag: linux.CLONE_THREAD, Name: "CLONE_THREAD", }, { - Flag: unix.CLONE_NEWNS, + Flag: linux.CLONE_NEWNS, Name: "CLONE_NEWNS", }, { - Flag: unix.CLONE_SYSVSEM, + Flag: linux.CLONE_SYSVSEM, Name: "CLONE_SYSVSEM", }, { - Flag: unix.CLONE_SETTLS, + Flag: linux.CLONE_SETTLS, Name: "CLONE_SETTLS", }, { - Flag: unix.CLONE_PARENT_SETTID, + Flag: linux.CLONE_PARENT_SETTID, Name: "CLONE_PARENT_SETTID", }, { - Flag: unix.CLONE_CHILD_CLEARTID, + Flag: linux.CLONE_CHILD_CLEARTID, Name: "CLONE_CHILD_CLEARTID", }, { - Flag: unix.CLONE_DETACHED, + Flag: linux.CLONE_DETACHED, Name: "CLONE_DETACHED", }, { - Flag: unix.CLONE_UNTRACED, + Flag: linux.CLONE_UNTRACED, Name: "CLONE_UNTRACED", }, { - Flag: unix.CLONE_CHILD_SETTID, + Flag: linux.CLONE_CHILD_SETTID, Name: "CLONE_CHILD_SETTID", }, { - Flag: unix.CLONE_NEWUTS, + Flag: linux.CLONE_NEWUTS, Name: "CLONE_NEWUTS", }, { - Flag: unix.CLONE_NEWIPC, + Flag: linux.CLONE_NEWIPC, Name: "CLONE_NEWIPC", }, { - Flag: unix.CLONE_NEWUSER, + Flag: linux.CLONE_NEWUSER, Name: "CLONE_NEWUSER", }, { - Flag: unix.CLONE_NEWPID, + Flag: linux.CLONE_NEWPID, Name: "CLONE_NEWPID", }, { - Flag: unix.CLONE_NEWNET, + Flag: linux.CLONE_NEWNET, Name: "CLONE_NEWNET", }, { - Flag: unix.CLONE_IO, + Flag: linux.CLONE_IO, Name: "CLONE_IO", }, } diff --git a/pkg/sentry/strace/linux64_amd64.go b/pkg/sentry/strace/linux64_amd64.go index d66befe81..6ce1bb592 100644 --- a/pkg/sentry/strace/linux64_amd64.go +++ b/pkg/sentry/strace/linux64_amd64.go @@ -33,7 +33,7 @@ var linuxAMD64 = SyscallMap{ 6: makeSyscallInfo("lstat", Path, Stat), 7: makeSyscallInfo("poll", PollFDs, Hex, Hex), 8: makeSyscallInfo("lseek", Hex, Hex, Hex), - 9: makeSyscallInfo("mmap", Hex, Hex, Hex, Hex, FD, Hex), + 9: makeSyscallInfo("mmap", Hex, Hex, MmapProt, MmapFlags, FD, Hex), 10: makeSyscallInfo("mprotect", Hex, Hex, Hex), 11: makeSyscallInfo("munmap", Hex, Hex), 12: makeSyscallInfo("brk", Hex), diff --git a/pkg/sentry/strace/linux64_arm64.go b/pkg/sentry/strace/linux64_arm64.go index 1a2d7d75f..ce5594301 100644 --- a/pkg/sentry/strace/linux64_arm64.go +++ b/pkg/sentry/strace/linux64_arm64.go @@ -246,7 +246,7 @@ var linuxARM64 = SyscallMap{ 219: makeSyscallInfo("keyctl", Hex, Hex, Hex, Hex, Hex), 220: makeSyscallInfo("clone", CloneFlags, Hex, Hex, Hex, Hex), 221: makeSyscallInfo("execve", Path, ExecveStringVector, ExecveStringVector), - 222: makeSyscallInfo("mmap", Hex, Hex, Hex, Hex, FD, Hex), + 222: makeSyscallInfo("mmap", Hex, Hex, MmapProt, MmapFlags, FD, Hex), 223: makeSyscallInfo("fadvise64", FD, Hex, Hex, Hex), 224: makeSyscallInfo("swapon", Hex, Hex), 225: makeSyscallInfo("swapoff", Hex), diff --git a/pkg/sentry/strace/mmap.go b/pkg/sentry/strace/mmap.go new file mode 100644 index 000000000..0035be586 --- /dev/null +++ b/pkg/sentry/strace/mmap.go @@ -0,0 +1,92 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package strace + +import ( + "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" +) + +// ProtectionFlagSet represents the protection to mmap(2). +var ProtectionFlagSet = abi.FlagSet{ + { + Flag: linux.PROT_READ, + Name: "PROT_READ", + }, + { + Flag: linux.PROT_WRITE, + Name: "PROT_WRITE", + }, + { + Flag: linux.PROT_EXEC, + Name: "PROT_EXEC", + }, +} + +// MmapFlagSet is the set of mmap(2) flags. +var MmapFlagSet = abi.FlagSet{ + { + Flag: linux.MAP_SHARED, + Name: "MAP_SHARED", + }, + { + Flag: linux.MAP_PRIVATE, + Name: "MAP_PRIVATE", + }, + { + Flag: linux.MAP_FIXED, + Name: "MAP_FIXED", + }, + { + Flag: linux.MAP_ANONYMOUS, + Name: "MAP_ANONYMOUS", + }, + { + Flag: linux.MAP_GROWSDOWN, + Name: "MAP_GROWSDOWN", + }, + { + Flag: linux.MAP_DENYWRITE, + Name: "MAP_DENYWRITE", + }, + { + Flag: linux.MAP_EXECUTABLE, + Name: "MAP_EXECUTABLE", + }, + { + Flag: linux.MAP_LOCKED, + Name: "MAP_LOCKED", + }, + { + Flag: linux.MAP_NORESERVE, + Name: "MAP_NORESERVE", + }, + { + Flag: linux.MAP_POPULATE, + Name: "MAP_POPULATE", + }, + { + Flag: linux.MAP_NONBLOCK, + Name: "MAP_NONBLOCK", + }, + { + Flag: linux.MAP_STACK, + Name: "MAP_STACK", + }, + { + Flag: linux.MAP_HUGETLB, + Name: "MAP_HUGETLB", + }, +} diff --git a/pkg/sentry/strace/open.go b/pkg/sentry/strace/open.go index 5769360da..e7c7649f4 100644 --- a/pkg/sentry/strace/open.go +++ b/pkg/sentry/strace/open.go @@ -15,61 +15,61 @@ package strace import ( - "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/abi" + "gvisor.dev/gvisor/pkg/abi/linux" ) // OpenMode represents the mode to open(2) a file. var OpenMode = abi.ValueSet{ - unix.O_RDWR: "O_RDWR", - unix.O_WRONLY: "O_WRONLY", - unix.O_RDONLY: "O_RDONLY", + linux.O_RDWR: "O_RDWR", + linux.O_WRONLY: "O_WRONLY", + linux.O_RDONLY: "O_RDONLY", } // OpenFlagSet is the set of open(2) flags. var OpenFlagSet = abi.FlagSet{ { - Flag: unix.O_APPEND, + Flag: linux.O_APPEND, Name: "O_APPEND", }, { - Flag: unix.O_ASYNC, + Flag: linux.O_ASYNC, Name: "O_ASYNC", }, { - Flag: unix.O_CLOEXEC, + Flag: linux.O_CLOEXEC, Name: "O_CLOEXEC", }, { - Flag: unix.O_CREAT, + Flag: linux.O_CREAT, Name: "O_CREAT", }, { - Flag: unix.O_DIRECT, + Flag: linux.O_DIRECT, Name: "O_DIRECT", }, { - Flag: unix.O_DIRECTORY, + Flag: linux.O_DIRECTORY, Name: "O_DIRECTORY", }, { - Flag: unix.O_EXCL, + Flag: linux.O_EXCL, Name: "O_EXCL", }, { - Flag: unix.O_NOATIME, + Flag: linux.O_NOATIME, Name: "O_NOATIME", }, { - Flag: unix.O_NOCTTY, + Flag: linux.O_NOCTTY, Name: "O_NOCTTY", }, { - Flag: unix.O_NOFOLLOW, + Flag: linux.O_NOFOLLOW, Name: "O_NOFOLLOW", }, { - Flag: unix.O_NONBLOCK, + Flag: linux.O_NONBLOCK, Name: "O_NONBLOCK", }, { @@ -77,18 +77,22 @@ var OpenFlagSet = abi.FlagSet{ Name: "O_PATH", }, { - Flag: unix.O_SYNC, + Flag: linux.O_SYNC, Name: "O_SYNC", }, { - Flag: unix.O_TRUNC, + Flag: linux.O_TMPFILE, + Name: "O_TMPFILE", + }, + { + Flag: linux.O_TRUNC, Name: "O_TRUNC", }, } func open(val uint64) string { - s := OpenMode.Parse(val & unix.O_ACCMODE) - if flags := OpenFlagSet.Parse(val &^ unix.O_ACCMODE); flags != "" { + s := OpenMode.Parse(val & linux.O_ACCMODE) + if flags := OpenFlagSet.Parse(val &^ linux.O_ACCMODE); flags != "" { s += "|" + flags } return s diff --git a/pkg/sentry/strace/signal.go b/pkg/sentry/strace/signal.go index e5b379a20..5afc9525b 100644 --- a/pkg/sentry/strace/signal.go +++ b/pkg/sentry/strace/signal.go @@ -130,8 +130,8 @@ func sigAction(t *kernel.Task, addr hostarch.Addr) string { return "null" } - sa, err := t.CopyInSignalAct(addr) - if err != nil { + var sa linux.SigAction + if _, err := sa.CopyIn(t, addr); err != nil { return fmt.Sprintf("%#x (error copying sigaction: %v)", addr, err) } diff --git a/pkg/sentry/strace/strace.go b/pkg/sentry/strace/strace.go index ec5d5f846..af7088847 100644 --- a/pkg/sentry/strace/strace.go +++ b/pkg/sentry/strace/strace.go @@ -489,6 +489,10 @@ func (i *SyscallInfo) pre(t *kernel.Task, args arch.SyscallArguments, maximumBlo output = append(output, epollEvents(t, args[arg].Pointer(), 0 /* numEvents */, uint64(maximumBlobSize))) case SelectFDSet: output = append(output, fdSet(t, int(args[0].Int()), args[arg].Pointer())) + case MmapProt: + output = append(output, ProtectionFlagSet.Parse(uint64(args[arg].Uint()))) + case MmapFlags: + output = append(output, MmapFlagSet.Parse(uint64(args[arg].Uint()))) case Oct: output = append(output, "0o"+strconv.FormatUint(args[arg].Uint64(), 8)) case Hex: diff --git a/pkg/sentry/strace/syscalls.go b/pkg/sentry/strace/syscalls.go index 7e69b9279..5893443a7 100644 --- a/pkg/sentry/strace/syscalls.go +++ b/pkg/sentry/strace/syscalls.go @@ -238,6 +238,12 @@ const ( // EpollEvents is an array of struct epoll_event. It is the events // argument in epoll_wait(2)/epoll_pwait(2). EpollEvents + + // MmapProt is the protection argument in mmap(2). + MmapProt + + // MmapFlags is the flags argument in mmap(2). + MmapFlags ) // defaultFormat is the syscall argument format to use if the actual format is diff --git a/pkg/sentry/syscalls/linux/sys_file.go b/pkg/sentry/syscalls/linux/sys_file.go index 9cd238efd..90a719ba2 100644 --- a/pkg/sentry/syscalls/linux/sys_file.go +++ b/pkg/sentry/syscalls/linux/sys_file.go @@ -1569,9 +1569,9 @@ func Truncate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sysc } if uint64(length) >= t.ThreadGroup().Limits().Get(limits.FileSize).Cur { - t.SendSignal(&arch.SignalInfo{ + t.SendSignal(&linux.SignalInfo{ Signo: int32(linux.SIGXFSZ), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, }) return 0, nil, syserror.EFBIG } @@ -1632,9 +1632,9 @@ func Ftruncate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys } if uint64(length) >= t.ThreadGroup().Limits().Get(limits.FileSize).Cur { - t.SendSignal(&arch.SignalInfo{ + t.SendSignal(&linux.SignalInfo{ Signo: int32(linux.SIGXFSZ), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, }) return 0, nil, syserror.EFBIG } @@ -1673,9 +1673,11 @@ func chown(t *kernel.Task, d *fs.Dirent, uid auth.UID, gid auth.GID) error { if err != nil { return err } + c := t.Credentials() hasCap := d.Inode.CheckCapability(t, linux.CAP_CHOWN) isOwner := uattr.Owner.UID == c.EffectiveKUID + var clearPrivilege bool if uid.Ok() { kuid := c.UserNamespace.MapToKUID(uid) // Valid UID must be supplied if UID is to be changed. @@ -1693,6 +1695,11 @@ func chown(t *kernel.Task, d *fs.Dirent, uid auth.UID, gid auth.GID) error { return syserror.EPERM } + // The setuid and setgid bits are cleared during a chown. + if uattr.Owner.UID != kuid { + clearPrivilege = true + } + owner.UID = kuid } if gid.Ok() { @@ -1711,6 +1718,11 @@ func chown(t *kernel.Task, d *fs.Dirent, uid auth.UID, gid auth.GID) error { return syserror.EPERM } + // The setuid and setgid bits are cleared during a chown. + if uattr.Owner.GID != kgid { + clearPrivilege = true + } + owner.GID = kgid } @@ -1721,10 +1733,14 @@ func chown(t *kernel.Task, d *fs.Dirent, uid auth.UID, gid auth.GID) error { if err := d.Inode.SetOwner(t, d, owner); err != nil { return err } + // Clear privilege bits if needed and they are set. + if clearPrivilege && uattr.Perms.HasSetUIDOrGID() && !fs.IsDir(d.Inode.StableAttr) { + uattr.Perms.DropSetUIDAndMaybeGID() + if !d.Inode.SetPermissions(t, d, uattr.Perms) { + return syserror.EPERM + } + } - // When the owner or group are changed by an unprivileged user, - // chown(2) also clears the set-user-ID and set-group-ID bits, but - // we do not support them. return nil } @@ -2124,9 +2140,9 @@ func Fallocate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys return 0, nil, syserror.EFBIG } if uint64(size) >= t.ThreadGroup().Limits().Get(limits.FileSize).Cur { - t.SendSignal(&arch.SignalInfo{ + t.SendSignal(&linux.SignalInfo{ Signo: int32(linux.SIGXFSZ), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, }) return 0, nil, syserror.EFBIG } diff --git a/pkg/sentry/syscalls/linux/sys_signal.go b/pkg/sentry/syscalls/linux/sys_signal.go index 53b12dc41..27a7f7fe1 100644 --- a/pkg/sentry/syscalls/linux/sys_signal.go +++ b/pkg/sentry/syscalls/linux/sys_signal.go @@ -84,9 +84,9 @@ func Kill(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC if !mayKill(t, target, sig) { return 0, nil, syserror.EPERM } - info := &arch.SignalInfo{ + info := &linux.SignalInfo{ Signo: int32(sig), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, } info.SetPID(int32(target.PIDNamespace().IDOfTask(t))) info.SetUID(int32(t.Credentials().RealKUID.In(target.UserNamespace()).OrOverflow())) @@ -123,9 +123,9 @@ func Kill(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC // depend on the iteration order. We at least implement the // semantics documented by the man page: "On success (at least // one signal was sent), zero is returned." - info := &arch.SignalInfo{ + info := &linux.SignalInfo{ Signo: int32(sig), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, } info.SetPID(int32(tg.PIDNamespace().IDOfTask(t))) info.SetUID(int32(t.Credentials().RealKUID.In(tg.Leader().UserNamespace()).OrOverflow())) @@ -167,9 +167,9 @@ func Kill(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC continue } - info := &arch.SignalInfo{ + info := &linux.SignalInfo{ Signo: int32(sig), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, } info.SetPID(int32(tg.PIDNamespace().IDOfTask(t))) info.SetUID(int32(t.Credentials().RealKUID.In(tg.Leader().UserNamespace()).OrOverflow())) @@ -184,10 +184,10 @@ func Kill(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC } } -func tkillSigInfo(sender, receiver *kernel.Task, sig linux.Signal) *arch.SignalInfo { - info := &arch.SignalInfo{ +func tkillSigInfo(sender, receiver *kernel.Task, sig linux.Signal) *linux.SignalInfo { + info := &linux.SignalInfo{ Signo: int32(sig), - Code: arch.SignalInfoTkill, + Code: linux.SI_TKILL, } info.SetPID(int32(receiver.PIDNamespace().IDOfThreadGroup(sender.ThreadGroup()))) info.SetUID(int32(sender.Credentials().RealKUID.In(receiver.UserNamespace()).OrOverflow())) @@ -251,20 +251,20 @@ func RtSigaction(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S return 0, nil, syserror.EINVAL } - var newactptr *arch.SignalAct + var newactptr *linux.SigAction if newactarg != 0 { - newact, err := t.CopyInSignalAct(newactarg) - if err != nil { + var newact linux.SigAction + if _, err := newact.CopyIn(t, newactarg); err != nil { return 0, nil, err } newactptr = &newact } - oldact, err := t.ThreadGroup().SetSignalAct(sig, newactptr) + oldact, err := t.ThreadGroup().SetSigAction(sig, newactptr) if err != nil { return 0, nil, err } if oldactarg != 0 { - if err := t.CopyOutSignalAct(oldactarg, &oldact); err != nil { + if _, err := oldact.CopyOut(t, oldactarg); err != nil { return 0, nil, err } } @@ -325,13 +325,12 @@ func Sigaltstack(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.S alt := t.SignalStack() if oldaddr != 0 { - if err := t.CopyOutSignalStack(oldaddr, &alt); err != nil { + if _, err := alt.CopyOut(t, oldaddr); err != nil { return 0, nil, err } } if setaddr != 0 { - alt, err := t.CopyInSignalStack(setaddr) - if err != nil { + if _, err := alt.CopyIn(t, setaddr); err != nil { return 0, nil, err } // The signal stack cannot be changed if the task is currently @@ -410,7 +409,7 @@ func RtSigqueueinfo(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kerne // We must ensure that the Signo is set (Linux overrides this in the // same way), and that the code is in the allowed set. This same logic // appears below in RtSigtgqueueinfo and should be kept in sync. - var info arch.SignalInfo + var info linux.SignalInfo if _, err := info.CopyIn(t, infoAddr); err != nil { return 0, nil, err } @@ -426,7 +425,7 @@ func RtSigqueueinfo(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kerne // If the sender is not the receiver, it can't use si_codes used by the // kernel or SI_TKILL. - if (info.Code >= 0 || info.Code == arch.SignalInfoTkill) && target != t { + if (info.Code >= 0 || info.Code == linux.SI_TKILL) && target != t { return 0, nil, syserror.EPERM } @@ -454,7 +453,7 @@ func RtTgsigqueueinfo(t *kernel.Task, args arch.SyscallArguments) (uintptr, *ker } // Copy in the info. See RtSigqueueinfo above. - var info arch.SignalInfo + var info linux.SignalInfo if _, err := info.CopyIn(t, infoAddr); err != nil { return 0, nil, err } @@ -469,7 +468,7 @@ func RtTgsigqueueinfo(t *kernel.Task, args arch.SyscallArguments) (uintptr, *ker // If the sender is not the receiver, it can't use si_codes used by the // kernel or SI_TKILL. - if (info.Code >= 0 || info.Code == arch.SignalInfoTkill) && target != t { + if (info.Code >= 0 || info.Code == linux.SI_TKILL) && target != t { return 0, nil, syserror.EPERM } diff --git a/pkg/sentry/syscalls/linux/sys_thread.go b/pkg/sentry/syscalls/linux/sys_thread.go index 3185ea527..0d5056303 100644 --- a/pkg/sentry/syscalls/linux/sys_thread.go +++ b/pkg/sentry/syscalls/linux/sys_thread.go @@ -398,7 +398,7 @@ func Waitid(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal // out the fields it would set for a successful waitid in this case // as well. if infop != 0 { - var si arch.SignalInfo + var si linux.SignalInfo _, err = si.CopyOut(t, infop) } } @@ -413,7 +413,7 @@ func Waitid(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal if infop == 0 { return 0, nil, nil } - si := arch.SignalInfo{ + si := linux.SignalInfo{ Signo: int32(linux.SIGCHLD), } si.SetPID(int32(wr.TID)) @@ -423,24 +423,24 @@ func Waitid(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal s := unix.WaitStatus(wr.Status) switch { case s.Exited(): - si.Code = arch.CLD_EXITED + si.Code = linux.CLD_EXITED si.SetStatus(int32(s.ExitStatus())) case s.Signaled(): - si.Code = arch.CLD_KILLED + si.Code = linux.CLD_KILLED si.SetStatus(int32(s.Signal())) case s.CoreDump(): - si.Code = arch.CLD_DUMPED + si.Code = linux.CLD_DUMPED si.SetStatus(int32(s.Signal())) case s.Stopped(): if wr.Event == kernel.EventTraceeStop { - si.Code = arch.CLD_TRAPPED + si.Code = linux.CLD_TRAPPED si.SetStatus(int32(s.TrapCause())) } else { - si.Code = arch.CLD_STOPPED + si.Code = linux.CLD_STOPPED si.SetStatus(int32(s.StopSignal())) } case s.Continued(): - si.Code = arch.CLD_CONTINUED + si.Code = linux.CLD_CONTINUED si.SetStatus(int32(linux.SIGCONT)) default: t.Warningf("waitid got incomprehensible wait status %d", s) diff --git a/pkg/sentry/syscalls/linux/sys_time.go b/pkg/sentry/syscalls/linux/sys_time.go index 83b777bbd..5c3b3dee2 100644 --- a/pkg/sentry/syscalls/linux/sys_time.go +++ b/pkg/sentry/syscalls/linux/sys_time.go @@ -180,21 +180,21 @@ func Time(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.SyscallC // // +stateify savable type clockNanosleepRestartBlock struct { - c ktime.Clock - duration time.Duration - rem hostarch.Addr + c ktime.Clock + end ktime.Time + rem hostarch.Addr } // Restart implements kernel.SyscallRestartBlock.Restart. func (n *clockNanosleepRestartBlock) Restart(t *kernel.Task) (uintptr, error) { - return 0, clockNanosleepFor(t, n.c, n.duration, n.rem) + return 0, clockNanosleepUntil(t, n.c, n.end, n.rem, true) } // clockNanosleepUntil blocks until a specified time. // // If blocking is interrupted, the syscall is restarted with the original // arguments. -func clockNanosleepUntil(t *kernel.Task, c ktime.Clock, ts linux.Timespec) error { +func clockNanosleepUntil(t *kernel.Task, c ktime.Clock, end ktime.Time, rem hostarch.Addr, needRestartBlock bool) error { notifier, tchan := ktime.NewChannelNotifier() timer := ktime.NewTimer(c, notifier) @@ -202,43 +202,22 @@ func clockNanosleepUntil(t *kernel.Task, c ktime.Clock, ts linux.Timespec) error timer.Swap(ktime.Setting{ Period: 0, Enabled: true, - Next: ktime.FromTimespec(ts), + Next: end, }) err := t.BlockWithTimer(nil, tchan) timer.Destroy() - // Did we just block until the timeout happened? - if err == syserror.ETIMEDOUT { - return nil - } - - return syserror.ConvertIntr(err, syserror.ERESTARTNOHAND) -} - -// clockNanosleepFor blocks for a specified duration. -// -// If blocking is interrupted, the syscall is restarted with the remaining -// duration timeout. -func clockNanosleepFor(t *kernel.Task, c ktime.Clock, dur time.Duration, rem hostarch.Addr) error { - timer, start, tchan := ktime.After(c, dur) - - err := t.BlockWithTimer(nil, tchan) - - after := c.Now() - - timer.Destroy() - switch err { case syserror.ETIMEDOUT: // Slept for entire timeout. return nil case syserror.ErrInterrupted: // Interrupted. - remaining := dur - after.Sub(start) - if remaining < 0 { - remaining = time.Duration(0) + remaining := end.Sub(c.Now()) + if remaining <= 0 { + return nil } // Copy out remaining time. @@ -248,14 +227,16 @@ func clockNanosleepFor(t *kernel.Task, c ktime.Clock, dur time.Duration, rem hos return err } } - - // Arrange for a restart with the remaining duration. - t.SetSyscallRestartBlock(&clockNanosleepRestartBlock{ - c: c, - duration: remaining, - rem: rem, - }) - return syserror.ERESTART_RESTARTBLOCK + if needRestartBlock { + // Arrange for a restart with the remaining duration. + t.SetSyscallRestartBlock(&clockNanosleepRestartBlock{ + c: c, + end: end, + rem: rem, + }) + return syserror.ERESTART_RESTARTBLOCK + } + return syserror.ERESTARTNOHAND default: panic(fmt.Sprintf("Impossible BlockWithTimer error %v", err)) } @@ -278,7 +259,8 @@ func Nanosleep(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys // Just like linux, we cap the timeout with the max number that int64 can // represent which is roughly 292 years. dur := time.Duration(ts.ToNsecCapped()) * time.Nanosecond - return 0, nil, clockNanosleepFor(t, t.Kernel().MonotonicClock(), dur, rem) + c := t.Kernel().MonotonicClock() + return 0, nil, clockNanosleepUntil(t, c, c.Now().Add(dur), rem, true) } // ClockNanosleep implements linux syscall clock_nanosleep(2). @@ -312,11 +294,11 @@ func ClockNanosleep(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kerne } if flags&linux.TIMER_ABSTIME != 0 { - return 0, nil, clockNanosleepUntil(t, c, req) + return 0, nil, clockNanosleepUntil(t, c, ktime.FromTimespec(req), 0, false) } dur := time.Duration(req.ToNsecCapped()) * time.Nanosecond - return 0, nil, clockNanosleepFor(t, c, dur, rem) + return 0, nil, clockNanosleepUntil(t, c, c.Now().Add(dur), rem, true) } // Gettimeofday implements linux syscall gettimeofday(2). diff --git a/pkg/sentry/syscalls/linux/vfs2/setstat.go b/pkg/sentry/syscalls/linux/vfs2/setstat.go index c6330c21a..647e089d0 100644 --- a/pkg/sentry/syscalls/linux/vfs2/setstat.go +++ b/pkg/sentry/syscalls/linux/vfs2/setstat.go @@ -242,9 +242,9 @@ func Fallocate(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Sys } limit := limits.FromContext(t).Get(limits.FileSize).Cur if uint64(size) >= limit { - t.SendSignal(&arch.SignalInfo{ + t.SendSignal(&linux.SignalInfo{ Signo: int32(linux.SIGXFSZ), - Code: arch.SignalInfoUser, + Code: linux.SI_USER, }) return 0, nil, syserror.EFBIG } diff --git a/pkg/sentry/time/BUILD b/pkg/sentry/time/BUILD index bc75a47fc..202486a1e 100644 --- a/pkg/sentry/time/BUILD +++ b/pkg/sentry/time/BUILD @@ -8,7 +8,7 @@ go_template_instance( out = "seqatomic_parameters_unsafe.go", package = "time", suffix = "Parameters", - template = "//pkg/sync:generic_seqatomic", + template = "//pkg/sync/seqatomic:generic_seqatomic", types = { "Value": "Parameters", }, diff --git a/pkg/sentry/time/sampler_amd64.go b/pkg/sentry/time/sampler_amd64.go index 72cb74be3..9f1b4b2fb 100644 --- a/pkg/sentry/time/sampler_amd64.go +++ b/pkg/sentry/time/sampler_amd64.go @@ -16,7 +16,7 @@ package time -const( +const ( // defaultOverheadTSC is the default estimated syscall overhead in TSC cycles. // It is further refined as syscalls are made. defaultOverheadCycles = 1 * 1000 diff --git a/pkg/sentry/time/sampler_arm64.go b/pkg/sentry/time/sampler_arm64.go index b9d0273b7..4c8d33ae4 100644 --- a/pkg/sentry/time/sampler_arm64.go +++ b/pkg/sentry/time/sampler_arm64.go @@ -30,7 +30,7 @@ func getDefaultArchOverheadCycles() TSCValue { // x86 devided by frqRatio cntfrq := getCNTFRQ() frqRatio := 1000000000 / cntfrq - overheadCycles := ( 1 * 1000 ) / frqRatio + overheadCycles := (1 * 1000) / frqRatio return overheadCycles } diff --git a/pkg/sentry/vfs/file_description.go b/pkg/sentry/vfs/file_description.go index 176bcc242..ef8d8a813 100644 --- a/pkg/sentry/vfs/file_description.go +++ b/pkg/sentry/vfs/file_description.go @@ -454,6 +454,9 @@ type FileDescriptionImpl interface { // RemoveXattr removes the given extended attribute from the file. RemoveXattr(ctx context.Context, name string) error + // SupportsLocks indicates whether file locks are supported. + SupportsLocks() bool + // LockBSD tries to acquire a BSD-style advisory file lock. LockBSD(ctx context.Context, uid lock.UniqueID, ownerPID int32, t lock.LockType, block lock.Blocker) error @@ -818,6 +821,11 @@ func (fd *FileDescription) Msync(ctx context.Context, mr memmap.MappableRange) e return fd.Sync(ctx) } +// SupportsLocks indicates whether file locks are supported. +func (fd *FileDescription) SupportsLocks() bool { + return fd.impl.SupportsLocks() +} + // LockBSD tries to acquire a BSD-style advisory file lock. func (fd *FileDescription) LockBSD(ctx context.Context, ownerPID int32, lockType lock.LockType, blocker lock.Blocker) error { atomic.StoreUint32(&fd.usedLockBSD, 1) diff --git a/pkg/sentry/vfs/file_description_impl_util.go b/pkg/sentry/vfs/file_description_impl_util.go index b87d9690a..2b6f47b4b 100644 --- a/pkg/sentry/vfs/file_description_impl_util.go +++ b/pkg/sentry/vfs/file_description_impl_util.go @@ -413,6 +413,11 @@ type LockFD struct { locks *FileLocks } +// SupportsLocks implements FileDescriptionImpl.SupportsLocks. +func (LockFD) SupportsLocks() bool { + return true +} + // Init initializes fd with FileLocks to use. func (fd *LockFD) Init(locks *FileLocks) { fd.locks = locks @@ -423,28 +428,28 @@ func (fd *LockFD) Locks() *FileLocks { return fd.locks } -// LockBSD implements vfs.FileDescriptionImpl.LockBSD. +// LockBSD implements FileDescriptionImpl.LockBSD. func (fd *LockFD) LockBSD(ctx context.Context, uid fslock.UniqueID, ownerPID int32, t fslock.LockType, block fslock.Blocker) error { return fd.locks.LockBSD(ctx, uid, ownerPID, t, block) } -// UnlockBSD implements vfs.FileDescriptionImpl.UnlockBSD. +// UnlockBSD implements FileDescriptionImpl.UnlockBSD. func (fd *LockFD) UnlockBSD(ctx context.Context, uid fslock.UniqueID) error { fd.locks.UnlockBSD(uid) return nil } -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. +// LockPOSIX implements FileDescriptionImpl.LockPOSIX. func (fd *LockFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, ownerPID int32, t fslock.LockType, r fslock.LockRange, block fslock.Blocker) error { return fd.locks.LockPOSIX(ctx, uid, ownerPID, t, r, block) } -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. +// UnlockPOSIX implements FileDescriptionImpl.UnlockPOSIX. func (fd *LockFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, r fslock.LockRange) error { return fd.locks.UnlockPOSIX(ctx, uid, r) } -// TestPOSIX implements vfs.FileDescriptionImpl.TestPOSIX. +// TestPOSIX implements FileDescriptionImpl.TestPOSIX. func (fd *LockFD) TestPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, r fslock.LockRange) (linux.Flock, error) { return fd.locks.TestPOSIX(ctx, uid, t, r) } @@ -455,27 +460,68 @@ func (fd *LockFD) TestPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.L // +stateify savable type NoLockFD struct{} -// LockBSD implements vfs.FileDescriptionImpl.LockBSD. +// SupportsLocks implements FileDescriptionImpl.SupportsLocks. +func (NoLockFD) SupportsLocks() bool { + return false +} + +// LockBSD implements FileDescriptionImpl.LockBSD. func (NoLockFD) LockBSD(ctx context.Context, uid fslock.UniqueID, ownerPID int32, t fslock.LockType, block fslock.Blocker) error { return syserror.ENOLCK } -// UnlockBSD implements vfs.FileDescriptionImpl.UnlockBSD. +// UnlockBSD implements FileDescriptionImpl.UnlockBSD. func (NoLockFD) UnlockBSD(ctx context.Context, uid fslock.UniqueID) error { return syserror.ENOLCK } -// LockPOSIX implements vfs.FileDescriptionImpl.LockPOSIX. +// LockPOSIX implements FileDescriptionImpl.LockPOSIX. func (NoLockFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, ownerPID int32, t fslock.LockType, r fslock.LockRange, block fslock.Blocker) error { return syserror.ENOLCK } -// UnlockPOSIX implements vfs.FileDescriptionImpl.UnlockPOSIX. +// UnlockPOSIX implements FileDescriptionImpl.UnlockPOSIX. func (NoLockFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, r fslock.LockRange) error { return syserror.ENOLCK } -// TestPOSIX implements vfs.FileDescriptionImpl.TestPOSIX. +// TestPOSIX implements FileDescriptionImpl.TestPOSIX. func (NoLockFD) TestPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, r fslock.LockRange) (linux.Flock, error) { return linux.Flock{}, syserror.ENOLCK } + +// BadLockFD implements Lock*/Unlock* portion of FileDescriptionImpl interface +// returning EBADF. +// +// +stateify savable +type BadLockFD struct{} + +// SupportsLocks implements FileDescriptionImpl.SupportsLocks. +func (BadLockFD) SupportsLocks() bool { + return false +} + +// LockBSD implements FileDescriptionImpl.LockBSD. +func (BadLockFD) LockBSD(ctx context.Context, uid fslock.UniqueID, ownerPID int32, t fslock.LockType, block fslock.Blocker) error { + return syserror.EBADF +} + +// UnlockBSD implements FileDescriptionImpl.UnlockBSD. +func (BadLockFD) UnlockBSD(ctx context.Context, uid fslock.UniqueID) error { + return syserror.EBADF +} + +// LockPOSIX implements FileDescriptionImpl.LockPOSIX. +func (BadLockFD) LockPOSIX(ctx context.Context, uid fslock.UniqueID, ownerPID int32, t fslock.LockType, r fslock.LockRange, block fslock.Blocker) error { + return syserror.EBADF +} + +// UnlockPOSIX implements FileDescriptionImpl.UnlockPOSIX. +func (BadLockFD) UnlockPOSIX(ctx context.Context, uid fslock.UniqueID, r fslock.LockRange) error { + return syserror.EBADF +} + +// TestPOSIX implements FileDescriptionImpl.TestPOSIX. +func (BadLockFD) TestPOSIX(ctx context.Context, uid fslock.UniqueID, t fslock.LockType, r fslock.LockRange) (linux.Flock, error) { + return linux.Flock{}, syserror.EBADF +} diff --git a/pkg/sentry/vfs/memxattr/BUILD b/pkg/sentry/vfs/memxattr/BUILD index d8c4d27b9..ea82f4987 100644 --- a/pkg/sentry/vfs/memxattr/BUILD +++ b/pkg/sentry/vfs/memxattr/BUILD @@ -8,6 +8,7 @@ go_library( visibility = ["//pkg/sentry:internal"], deps = [ "//pkg/abi/linux", + "//pkg/sentry/kernel/auth", "//pkg/sentry/vfs", "//pkg/sync", "//pkg/syserror", diff --git a/pkg/sentry/vfs/memxattr/xattr.go b/pkg/sentry/vfs/memxattr/xattr.go index 638b5d830..9b7953fa3 100644 --- a/pkg/sentry/vfs/memxattr/xattr.go +++ b/pkg/sentry/vfs/memxattr/xattr.go @@ -17,7 +17,10 @@ package memxattr import ( + "strings" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/sentry/kernel/auth" "gvisor.dev/gvisor/pkg/sentry/vfs" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/syserror" @@ -26,6 +29,9 @@ import ( // SimpleExtendedAttributes implements extended attributes using a map of // names to values. // +// SimpleExtendedAttributes calls vfs.CheckXattrPermissions, so callers are not +// required to do so. +// // +stateify savable type SimpleExtendedAttributes struct { // mu protects the below fields. @@ -34,7 +40,11 @@ type SimpleExtendedAttributes struct { } // GetXattr returns the value at 'name'. -func (x *SimpleExtendedAttributes) GetXattr(opts *vfs.GetXattrOptions) (string, error) { +func (x *SimpleExtendedAttributes) GetXattr(creds *auth.Credentials, mode linux.FileMode, kuid auth.KUID, opts *vfs.GetXattrOptions) (string, error) { + if err := vfs.CheckXattrPermissions(creds, vfs.MayRead, mode, kuid, opts.Name); err != nil { + return "", err + } + x.mu.RLock() value, ok := x.xattrs[opts.Name] x.mu.RUnlock() @@ -50,7 +60,11 @@ func (x *SimpleExtendedAttributes) GetXattr(opts *vfs.GetXattrOptions) (string, } // SetXattr sets 'value' at 'name'. -func (x *SimpleExtendedAttributes) SetXattr(opts *vfs.SetXattrOptions) error { +func (x *SimpleExtendedAttributes) SetXattr(creds *auth.Credentials, mode linux.FileMode, kuid auth.KUID, opts *vfs.SetXattrOptions) error { + if err := vfs.CheckXattrPermissions(creds, vfs.MayWrite, mode, kuid, opts.Name); err != nil { + return err + } + x.mu.Lock() defer x.mu.Unlock() if x.xattrs == nil { @@ -73,12 +87,19 @@ func (x *SimpleExtendedAttributes) SetXattr(opts *vfs.SetXattrOptions) error { } // ListXattr returns all names in xattrs. -func (x *SimpleExtendedAttributes) ListXattr(size uint64) ([]string, error) { +func (x *SimpleExtendedAttributes) ListXattr(creds *auth.Credentials, size uint64) ([]string, error) { // Keep track of the size of the buffer needed in listxattr(2) for the list. listSize := 0 x.mu.RLock() names := make([]string, 0, len(x.xattrs)) + haveCap := creds.HasCapability(linux.CAP_SYS_ADMIN) for n := range x.xattrs { + // Hide extended attributes in the "trusted" namespace from + // non-privileged users. This is consistent with Linux's + // fs/xattr.c:simple_xattr_list(). + if !haveCap && strings.HasPrefix(n, linux.XATTR_TRUSTED_PREFIX) { + continue + } names = append(names, n) // Add one byte per null terminator. listSize += len(n) + 1 @@ -91,7 +112,11 @@ func (x *SimpleExtendedAttributes) ListXattr(size uint64) ([]string, error) { } // RemoveXattr removes the xattr at 'name'. -func (x *SimpleExtendedAttributes) RemoveXattr(name string) error { +func (x *SimpleExtendedAttributes) RemoveXattr(creds *auth.Credentials, mode linux.FileMode, kuid auth.KUID, name string) error { + if err := vfs.CheckXattrPermissions(creds, vfs.MayWrite, mode, kuid, name); err != nil { + return err + } + x.mu.Lock() defer x.mu.Unlock() if _, ok := x.xattrs[name]; !ok { diff --git a/pkg/sentry/vfs/mount.go b/pkg/sentry/vfs/mount.go index 82fd382c2..f93da3af1 100644 --- a/pkg/sentry/vfs/mount.go +++ b/pkg/sentry/vfs/mount.go @@ -220,7 +220,7 @@ func (vfs *VirtualFilesystem) ConnectMountAt(ctx context.Context, creds *auth.Cr vdDentry := vd.dentry vdDentry.mu.Lock() for { - if vdDentry.dead { + if vd.mount.umounted || vdDentry.dead { vdDentry.mu.Unlock() vfs.mountMu.Unlock() vd.DecRef(ctx) diff --git a/pkg/sentry/vfs/opath.go b/pkg/sentry/vfs/opath.go index 47848c76b..e9651b631 100644 --- a/pkg/sentry/vfs/opath.go +++ b/pkg/sentry/vfs/opath.go @@ -24,96 +24,96 @@ import ( "gvisor.dev/gvisor/pkg/usermem" ) -// opathFD implements vfs.FileDescriptionImpl for a file description opened with O_PATH. +// opathFD implements FileDescriptionImpl for a file description opened with O_PATH. // // +stateify savable type opathFD struct { vfsfd FileDescription FileDescriptionDefaultImpl - NoLockFD + BadLockFD } -// Release implements vfs.FileDescriptionImpl.Release. +// Release implements FileDescriptionImpl.Release. func (fd *opathFD) Release(context.Context) { // noop } -// Allocate implements vfs.FileDescriptionImpl.Allocate. +// Allocate implements FileDescriptionImpl.Allocate. func (fd *opathFD) Allocate(ctx context.Context, mode, offset, length uint64) error { return syserror.EBADF } -// PRead implements vfs.FileDescriptionImpl.PRead. +// PRead implements FileDescriptionImpl.PRead. func (fd *opathFD) PRead(ctx context.Context, dst usermem.IOSequence, offset int64, opts ReadOptions) (int64, error) { return 0, syserror.EBADF } -// Read implements vfs.FileDescriptionImpl.Read. +// Read implements FileDescriptionImpl.Read. func (fd *opathFD) Read(ctx context.Context, dst usermem.IOSequence, opts ReadOptions) (int64, error) { return 0, syserror.EBADF } -// PWrite implements vfs.FileDescriptionImpl.PWrite. +// PWrite implements FileDescriptionImpl.PWrite. func (fd *opathFD) PWrite(ctx context.Context, src usermem.IOSequence, offset int64, opts WriteOptions) (int64, error) { return 0, syserror.EBADF } -// Write implements vfs.FileDescriptionImpl.Write. +// Write implements FileDescriptionImpl.Write. func (fd *opathFD) Write(ctx context.Context, src usermem.IOSequence, opts WriteOptions) (int64, error) { return 0, syserror.EBADF } -// Ioctl implements vfs.FileDescriptionImpl.Ioctl. +// Ioctl implements FileDescriptionImpl.Ioctl. func (fd *opathFD) Ioctl(ctx context.Context, uio usermem.IO, args arch.SyscallArguments) (uintptr, error) { return 0, syserror.EBADF } -// IterDirents implements vfs.FileDescriptionImpl.IterDirents. +// IterDirents implements FileDescriptionImpl.IterDirents. func (fd *opathFD) IterDirents(ctx context.Context, cb IterDirentsCallback) error { return syserror.EBADF } -// Seek implements vfs.FileDescriptionImpl.Seek. +// Seek implements FileDescriptionImpl.Seek. func (fd *opathFD) Seek(ctx context.Context, offset int64, whence int32) (int64, error) { return 0, syserror.EBADF } -// ConfigureMMap implements vfs.FileDescriptionImpl.ConfigureMMap. +// ConfigureMMap implements FileDescriptionImpl.ConfigureMMap. func (fd *opathFD) ConfigureMMap(ctx context.Context, opts *memmap.MMapOpts) error { return syserror.EBADF } -// ListXattr implements vfs.FileDescriptionImpl.ListXattr. +// ListXattr implements FileDescriptionImpl.ListXattr. func (fd *opathFD) ListXattr(ctx context.Context, size uint64) ([]string, error) { return nil, syserror.EBADF } -// GetXattr implements vfs.FileDescriptionImpl.GetXattr. +// GetXattr implements FileDescriptionImpl.GetXattr. func (fd *opathFD) GetXattr(ctx context.Context, opts GetXattrOptions) (string, error) { return "", syserror.EBADF } -// SetXattr implements vfs.FileDescriptionImpl.SetXattr. +// SetXattr implements FileDescriptionImpl.SetXattr. func (fd *opathFD) SetXattr(ctx context.Context, opts SetXattrOptions) error { return syserror.EBADF } -// RemoveXattr implements vfs.FileDescriptionImpl.RemoveXattr. +// RemoveXattr implements FileDescriptionImpl.RemoveXattr. func (fd *opathFD) RemoveXattr(ctx context.Context, name string) error { return syserror.EBADF } -// Sync implements vfs.FileDescriptionImpl.Sync. +// Sync implements FileDescriptionImpl.Sync. func (fd *opathFD) Sync(ctx context.Context) error { return syserror.EBADF } -// SetStat implements vfs.FileDescriptionImpl.SetStat. +// SetStat implements FileDescriptionImpl.SetStat. func (fd *opathFD) SetStat(ctx context.Context, opts SetStatOptions) error { return syserror.EBADF } -// Stat implements vfs.FileDescriptionImpl.Stat. +// Stat implements FileDescriptionImpl.Stat. func (fd *opathFD) Stat(ctx context.Context, opts StatOptions) (linux.Statx, error) { vfsObj := fd.vfsfd.vd.mount.vfs rp := vfsObj.getResolvingPath(auth.CredentialsFromContext(ctx), &PathOperation{ diff --git a/pkg/sentry/watchdog/watchdog.go b/pkg/sentry/watchdog/watchdog.go index 8e3146d8d..8d563d53a 100644 --- a/pkg/sentry/watchdog/watchdog.go +++ b/pkg/sentry/watchdog/watchdog.go @@ -115,14 +115,14 @@ func (a *Action) Get() interface{} { } // String returns Action's string representation. -func (a *Action) String() string { - switch *a { +func (a Action) String() string { + switch a { case LogWarning: return "logWarning" case Panic: return "panic" default: - panic(fmt.Sprintf("Invalid watchdog action: %d", *a)) + panic(fmt.Sprintf("Invalid watchdog action: %d", a)) } } @@ -243,6 +243,7 @@ func (w *Watchdog) waitForStart() { } stuckStartup.Increment() + metric.WeirdnessMetric.Increment("watchdog_stuck_startup") var buf bytes.Buffer buf.WriteString(fmt.Sprintf("Watchdog.Start() not called within %s", w.StartupTimeout)) @@ -312,10 +313,11 @@ func (w *Watchdog) runTurn() { // New stuck task detected. // // Note that tasks blocked doing IO may be considered stuck in kernel, - // unless they are surrounded b + // unless they are surrounded by // Task.UninterruptibleSleepStart/Finish. tc = &offender{lastUpdateTime: lastUpdateTime} stuckTasks.Increment() + metric.WeirdnessMetric.Increment("watchdog_stuck_tasks") newTaskFound = true } newOffenders[t] = tc diff --git a/pkg/shim/BUILD b/pkg/shim/BUILD index 4f7c02f5d..fd6127b97 100644 --- a/pkg/shim/BUILD +++ b/pkg/shim/BUILD @@ -1,4 +1,4 @@ -load("//tools:defs.bzl", "go_library") +load("//tools:defs.bzl", "go_library", "go_test") package(licenses = ["notice"]) @@ -41,7 +41,19 @@ go_library( "@com_github_containerd_fifo//:go_default_library", "@com_github_containerd_typeurl//:go_default_library", "@com_github_gogo_protobuf//types:go_default_library", + "@com_github_opencontainers_runtime_spec//specs-go:go_default_library", "@com_github_sirupsen_logrus//:go_default_library", "@org_golang_x_sys//unix:go_default_library", ], ) + +go_test( + name = "shim_test", + size = "small", + srcs = ["service_test.go"], + library = ":shim", + deps = [ + "//pkg/shim/utils", + "@com_github_opencontainers_runtime_spec//specs-go:go_default_library", + ], +) diff --git a/pkg/shim/service.go b/pkg/shim/service.go index 9d9fa8ef6..1f9adcb65 100644 --- a/pkg/shim/service.go +++ b/pkg/shim/service.go @@ -22,6 +22,7 @@ import ( "os" "os/exec" "path/filepath" + "strings" "sync" "time" @@ -44,6 +45,7 @@ import ( "github.com/containerd/containerd/sys/reaper" "github.com/containerd/typeurl" "github.com/gogo/protobuf/types" + specs "github.com/opencontainers/runtime-spec/specs-go" "github.com/sirupsen/logrus" "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/cleanup" @@ -944,9 +946,19 @@ func newInit(path, workDir, namespace string, platform stdio.Platform, r *proc.C if err != nil { return nil, fmt.Errorf("read oci spec: %w", err) } - if err := utils.UpdateVolumeAnnotations(r.Bundle, spec); err != nil { + + updated, err := utils.UpdateVolumeAnnotations(spec) + if err != nil { return nil, fmt.Errorf("update volume annotations: %w", err) } + updated = updateCgroup(spec) || updated + + if updated { + if err := utils.WriteSpec(r.Bundle, spec); err != nil { + return nil, err + } + } + runsc.FormatRunscLogPath(r.ID, options.RunscConfig) runtime := proc.NewRunsc(options.Root, path, namespace, options.BinaryName, options.RunscConfig) p := proc.New(r.ID, runtime, stdio.Stdio{ @@ -966,3 +978,39 @@ func newInit(path, workDir, namespace string, platform stdio.Platform, r *proc.C p.Monitor = reaper.Default return p, nil } + +// updateCgroup updates cgroup path for the sandbox to make the sandbox join the +// pod cgroup and not the pause container cgroup. Returns true if the spec was +// modified. Ex.: +// /kubepods/burstable/pod123/abc => kubepods/burstable/pod123 +// +func updateCgroup(spec *specs.Spec) bool { + if !utils.IsSandbox(spec) { + return false + } + if spec.Linux == nil || len(spec.Linux.CgroupsPath) == 0 { + return false + } + + // Search backwards for the pod cgroup path to make the sandbox use it, + // instead of the pause container's cgroup. + parts := strings.Split(spec.Linux.CgroupsPath, string(filepath.Separator)) + for i := len(parts) - 1; i >= 0; i-- { + if strings.HasPrefix(parts[i], "pod") { + var path string + for j := 0; j <= i; j++ { + path = filepath.Join(path, parts[j]) + } + // Add back the initial '/' that may have been lost above. + if filepath.IsAbs(spec.Linux.CgroupsPath) { + path = string(filepath.Separator) + path + } + if spec.Linux.CgroupsPath == path { + return false + } + spec.Linux.CgroupsPath = path + return true + } + } + return false +} diff --git a/pkg/shim/service_test.go b/pkg/shim/service_test.go new file mode 100644 index 000000000..2d9f07e02 --- /dev/null +++ b/pkg/shim/service_test.go @@ -0,0 +1,121 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package shim + +import ( + "testing" + + specs "github.com/opencontainers/runtime-spec/specs-go" + "gvisor.dev/gvisor/pkg/shim/utils" +) + +func TestCgroupPath(t *testing.T) { + for _, tc := range []struct { + name string + path string + want string + }{ + { + name: "simple", + path: "foo/pod123/container", + want: "foo/pod123", + }, + { + name: "absolute", + path: "/foo/pod123/container", + want: "/foo/pod123", + }, + { + name: "no-container", + path: "foo/pod123", + want: "foo/pod123", + }, + { + name: "no-container-absolute", + path: "/foo/pod123", + want: "/foo/pod123", + }, + { + name: "double-pod", + path: "/foo/podium/pod123/container", + want: "/foo/podium/pod123", + }, + { + name: "start-pod", + path: "pod123/container", + want: "pod123", + }, + { + name: "start-pod-absolute", + path: "/pod123/container", + want: "/pod123", + }, + { + name: "slashes", + path: "///foo/////pod123//////container", + want: "/foo/pod123", + }, + { + name: "no-pod", + path: "/foo/nopod123/container", + want: "/foo/nopod123/container", + }, + } { + t.Run(tc.name, func(t *testing.T) { + spec := specs.Spec{ + Linux: &specs.Linux{ + CgroupsPath: tc.path, + }, + } + updated := updateCgroup(&spec) + if spec.Linux.CgroupsPath != tc.want { + t.Errorf("updateCgroup(%q), want: %q, got: %q", tc.path, tc.want, spec.Linux.CgroupsPath) + } + if shouldUpdate := tc.path != tc.want; shouldUpdate != updated { + t.Errorf("updateCgroup(%q)=%v, want: %v", tc.path, updated, shouldUpdate) + } + }) + } +} + +// Test cases that cgroup path should not be updated. +func TestCgroupNoUpdate(t *testing.T) { + for _, tc := range []struct { + name string + spec *specs.Spec + }{ + { + name: "empty", + spec: &specs.Spec{}, + }, + { + name: "subcontainer", + spec: &specs.Spec{ + Linux: &specs.Linux{ + CgroupsPath: "foo/pod123/container", + }, + Annotations: map[string]string{ + utils.ContainerTypeAnnotation: utils.ContainerTypeContainer, + }, + }, + }, + } { + t.Run(tc.name, func(t *testing.T) { + if updated := updateCgroup(tc.spec); updated { + t.Errorf("updateCgroup(%+v), got: %v, want: false", tc.spec.Linux, updated) + } + }) + } +} diff --git a/pkg/shim/utils/annotations.go b/pkg/shim/utils/annotations.go index 1e9d3f365..c744800bb 100644 --- a/pkg/shim/utils/annotations.go +++ b/pkg/shim/utils/annotations.go @@ -19,7 +19,9 @@ package utils // These are vendor due to import conflicts. const ( sandboxLogDirAnnotation = "io.kubernetes.cri.sandbox-log-directory" - containerTypeAnnotation = "io.kubernetes.cri.container-type" + // ContainerTypeAnnotation is they key that defines sandbox or container. + ContainerTypeAnnotation = "io.kubernetes.cri.container-type" containerTypeSandbox = "sandbox" - containerTypeContainer = "container" + // ContainerTypeContainer is the value for container. + ContainerTypeContainer = "container" ) diff --git a/pkg/shim/utils/utils.go b/pkg/shim/utils/utils.go index 7b1cd983e..f183b1bbc 100644 --- a/pkg/shim/utils/utils.go +++ b/pkg/shim/utils/utils.go @@ -18,19 +18,16 @@ package utils import ( "encoding/json" "io/ioutil" - "os" "path/filepath" specs "github.com/opencontainers/runtime-spec/specs-go" ) +const configFilename = "config.json" + // ReadSpec reads OCI spec from the bundle directory. func ReadSpec(bundle string) (*specs.Spec, error) { - f, err := os.Open(filepath.Join(bundle, "config.json")) - if err != nil { - return nil, err - } - b, err := ioutil.ReadAll(f) + b, err := ioutil.ReadFile(filepath.Join(bundle, configFilename)) if err != nil { return nil, err } @@ -41,9 +38,18 @@ func ReadSpec(bundle string) (*specs.Spec, error) { return &spec, nil } +// WriteSpec writes OCI spec to the bundle directory. +func WriteSpec(bundle string, spec *specs.Spec) error { + b, err := json.Marshal(spec) + if err != nil { + return err + } + return ioutil.WriteFile(filepath.Join(bundle, configFilename), b, 0666) +} + // IsSandbox checks whether a container is a sandbox container. func IsSandbox(spec *specs.Spec) bool { - t, ok := spec.Annotations[containerTypeAnnotation] + t, ok := spec.Annotations[ContainerTypeAnnotation] return !ok || t == containerTypeSandbox } diff --git a/pkg/shim/utils/volumes.go b/pkg/shim/utils/volumes.go index cdcb88229..6bc75139d 100644 --- a/pkg/shim/utils/volumes.go +++ b/pkg/shim/utils/volumes.go @@ -15,9 +15,7 @@ package utils import ( - "encoding/json" "fmt" - "io/ioutil" "path/filepath" "strings" @@ -89,8 +87,8 @@ func isVolumePath(volume, path string) (bool, error) { } // UpdateVolumeAnnotations add necessary OCI annotations for gvisor -// volume optimization. -func UpdateVolumeAnnotations(bundle string, s *specs.Spec) error { +// volume optimization. Returns true if the spec was modified. +func UpdateVolumeAnnotations(s *specs.Spec) (bool, error) { var uid string if IsSandbox(s) { var err error @@ -98,7 +96,7 @@ func UpdateVolumeAnnotations(bundle string, s *specs.Spec) error { if err != nil { // Skip if we can't get pod UID, because this doesn't work // for containerd 1.1. - return nil + return false, nil } } var updated bool @@ -114,7 +112,7 @@ func UpdateVolumeAnnotations(bundle string, s *specs.Spec) error { // This is a sandbox. path, err := volumePath(volume, uid) if err != nil { - return fmt.Errorf("get volume path for %q: %w", volume, err) + return false, fmt.Errorf("get volume path for %q: %w", volume, err) } s.Annotations[volumeSourceKey(volume)] = path updated = true @@ -138,15 +136,7 @@ func UpdateVolumeAnnotations(bundle string, s *specs.Spec) error { } } } - if !updated { - return nil - } - // Update bundle. - b, err := json.Marshal(s) - if err != nil { - return err - } - return ioutil.WriteFile(filepath.Join(bundle, "config.json"), b, 0666) + return updated, nil } func changeMountType(m *specs.Mount, newType string) { diff --git a/pkg/shim/utils/volumes_test.go b/pkg/shim/utils/volumes_test.go index b25c53c73..5db43cdf1 100644 --- a/pkg/shim/utils/volumes_test.go +++ b/pkg/shim/utils/volumes_test.go @@ -15,11 +15,9 @@ package utils import ( - "encoding/json" "fmt" "io/ioutil" "os" - "path/filepath" "reflect" "testing" @@ -58,7 +56,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { spec: &specs.Spec{ Annotations: map[string]string{ sandboxLogDirAnnotation: testLogDirPath, - containerTypeAnnotation: containerTypeSandbox, + ContainerTypeAnnotation: containerTypeSandbox, volumeKeyPrefix + testVolumeName + ".share": "pod", volumeKeyPrefix + testVolumeName + ".type": "tmpfs", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -67,7 +65,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { expected: &specs.Spec{ Annotations: map[string]string{ sandboxLogDirAnnotation: testLogDirPath, - containerTypeAnnotation: containerTypeSandbox, + ContainerTypeAnnotation: containerTypeSandbox, volumeKeyPrefix + testVolumeName + ".share": "pod", volumeKeyPrefix + testVolumeName + ".type": "tmpfs", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -81,7 +79,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { spec: &specs.Spec{ Annotations: map[string]string{ sandboxLogDirAnnotation: testLegacyLogDirPath, - containerTypeAnnotation: containerTypeSandbox, + ContainerTypeAnnotation: containerTypeSandbox, volumeKeyPrefix + testVolumeName + ".share": "pod", volumeKeyPrefix + testVolumeName + ".type": "tmpfs", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -90,7 +88,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { expected: &specs.Spec{ Annotations: map[string]string{ sandboxLogDirAnnotation: testLegacyLogDirPath, - containerTypeAnnotation: containerTypeSandbox, + ContainerTypeAnnotation: containerTypeSandbox, volumeKeyPrefix + testVolumeName + ".share": "pod", volumeKeyPrefix + testVolumeName + ".type": "tmpfs", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -117,7 +115,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { }, }, Annotations: map[string]string{ - containerTypeAnnotation: containerTypeContainer, + ContainerTypeAnnotation: ContainerTypeContainer, volumeKeyPrefix + testVolumeName + ".share": "pod", volumeKeyPrefix + testVolumeName + ".type": "tmpfs", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -139,7 +137,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { }, }, Annotations: map[string]string{ - containerTypeAnnotation: containerTypeContainer, + ContainerTypeAnnotation: ContainerTypeContainer, volumeKeyPrefix + testVolumeName + ".share": "pod", volumeKeyPrefix + testVolumeName + ".type": "tmpfs", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -159,7 +157,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { }, }, Annotations: map[string]string{ - containerTypeAnnotation: containerTypeContainer, + ContainerTypeAnnotation: ContainerTypeContainer, volumeKeyPrefix + testVolumeName + ".share": "container", volumeKeyPrefix + testVolumeName + ".type": "bind", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -175,7 +173,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { }, }, Annotations: map[string]string{ - containerTypeAnnotation: containerTypeContainer, + ContainerTypeAnnotation: ContainerTypeContainer, volumeKeyPrefix + testVolumeName + ".share": "container", volumeKeyPrefix + testVolumeName + ".type": "bind", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -187,7 +185,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { name: "should not return error without pod log directory", spec: &specs.Spec{ Annotations: map[string]string{ - containerTypeAnnotation: containerTypeSandbox, + ContainerTypeAnnotation: containerTypeSandbox, volumeKeyPrefix + testVolumeName + ".share": "pod", volumeKeyPrefix + testVolumeName + ".type": "tmpfs", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -195,7 +193,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { }, expected: &specs.Spec{ Annotations: map[string]string{ - containerTypeAnnotation: containerTypeSandbox, + ContainerTypeAnnotation: containerTypeSandbox, volumeKeyPrefix + testVolumeName + ".share": "pod", volumeKeyPrefix + testVolumeName + ".type": "tmpfs", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -207,7 +205,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { spec: &specs.Spec{ Annotations: map[string]string{ sandboxLogDirAnnotation: testLogDirPath, - containerTypeAnnotation: containerTypeSandbox, + ContainerTypeAnnotation: containerTypeSandbox, volumeKeyPrefix + "notexist.share": "pod", volumeKeyPrefix + "notexist.type": "tmpfs", volumeKeyPrefix + "notexist.options": "ro", @@ -220,13 +218,13 @@ func TestUpdateVolumeAnnotations(t *testing.T) { spec: &specs.Spec{ Annotations: map[string]string{ sandboxLogDirAnnotation: testLogDirPath, - containerTypeAnnotation: containerTypeSandbox, + ContainerTypeAnnotation: containerTypeSandbox, }, }, expected: &specs.Spec{ Annotations: map[string]string{ sandboxLogDirAnnotation: testLogDirPath, - containerTypeAnnotation: containerTypeSandbox, + ContainerTypeAnnotation: containerTypeSandbox, }, }, }, @@ -248,7 +246,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { }, }, Annotations: map[string]string{ - containerTypeAnnotation: containerTypeContainer, + ContainerTypeAnnotation: ContainerTypeContainer, }, }, expected: &specs.Spec{ @@ -267,7 +265,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { }, }, Annotations: map[string]string{ - containerTypeAnnotation: containerTypeContainer, + ContainerTypeAnnotation: ContainerTypeContainer, }, }, }, @@ -275,7 +273,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { name: "bind options removed", spec: &specs.Spec{ Annotations: map[string]string{ - containerTypeAnnotation: containerTypeContainer, + ContainerTypeAnnotation: ContainerTypeContainer, volumeKeyPrefix + testVolumeName + ".share": "pod", volumeKeyPrefix + testVolumeName + ".type": "tmpfs", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -292,7 +290,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { }, expected: &specs.Spec{ Annotations: map[string]string{ - containerTypeAnnotation: containerTypeContainer, + ContainerTypeAnnotation: ContainerTypeContainer, volumeKeyPrefix + testVolumeName + ".share": "pod", volumeKeyPrefix + testVolumeName + ".type": "tmpfs", volumeKeyPrefix + testVolumeName + ".options": "ro", @@ -311,11 +309,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) { }, } { t.Run(test.name, func(t *testing.T) { - bundle, err := ioutil.TempDir(dir, "test-bundle") - if err != nil { - t.Fatalf("Create test bundle: %v", err) - } - err = UpdateVolumeAnnotations(bundle, test.spec) + updated, err := UpdateVolumeAnnotations(test.spec) if test.expectErr { if err == nil { t.Fatal("Expected error, but got nil") @@ -328,18 +322,8 @@ func TestUpdateVolumeAnnotations(t *testing.T) { if !reflect.DeepEqual(test.expected, test.spec) { t.Fatalf("Expected %+v, got %+v", test.expected, test.spec) } - if test.expectUpdate { - b, err := ioutil.ReadFile(filepath.Join(bundle, "config.json")) - if err != nil { - t.Fatalf("Read spec from bundle: %v", err) - } - var spec specs.Spec - if err := json.Unmarshal(b, &spec); err != nil { - t.Fatalf("Unmarshal spec: %v", err) - } - if !reflect.DeepEqual(test.expected, &spec) { - t.Fatalf("Expected %+v, got %+v", test.expected, &spec) - } + if test.expectUpdate != updated { + t.Errorf("Expected %v, got %v", test.expected, updated) } }) } diff --git a/pkg/sync/BUILD b/pkg/sync/BUILD index 8b3a11c64..73791b456 100644 --- a/pkg/sync/BUILD +++ b/pkg/sync/BUILD @@ -1,5 +1,4 @@ load("//tools:defs.bzl", "go_library", "go_test") -load("//tools/go_generics:defs.bzl", "go_template") package( default_visibility = ["//:sandbox"], @@ -8,45 +7,6 @@ package( exports_files(["LICENSE"]) -go_template( - name = "generic_atomicptr", - srcs = ["generic_atomicptr_unsafe.go"], - types = [ - "Value", - ], -) - -go_template( - name = "generic_atomicptrmap", - srcs = ["generic_atomicptrmap_unsafe.go"], - opt_consts = [ - "ShardOrder", - ], - opt_types = [ - "Hasher", - ], - types = [ - "Key", - "Value", - ], - deps = [ - ":sync", - "//pkg/gohacks", - ], -) - -go_template( - name = "generic_seqatomic", - srcs = ["generic_seqatomic_unsafe.go"], - types = [ - "Value", - ], - deps = [ - ":sync", - "//pkg/gohacks", - ], -) - go_library( name = "sync", srcs = [ diff --git a/pkg/sync/README.md b/pkg/sync/README.md index 2183c4e20..be1a01f08 100644 --- a/pkg/sync/README.md +++ b/pkg/sync/README.md @@ -1,4 +1,4 @@ -# Syncutil +# sync This package provides additional synchronization primitives not provided by the Go stdlib 'sync' package. It is partially derived from the upstream 'sync' diff --git a/pkg/sync/atomicptrtest/BUILD b/pkg/sync/atomicptr/BUILD index e97553254..a6a7f01ac 100644 --- a/pkg/sync/atomicptrtest/BUILD +++ b/pkg/sync/atomicptr/BUILD @@ -1,14 +1,23 @@ load("//tools:defs.bzl", "go_library", "go_test") -load("//tools/go_generics:defs.bzl", "go_template_instance") +load("//tools/go_generics:defs.bzl", "go_template", "go_template_instance") package(licenses = ["notice"]) +go_template( + name = "generic_atomicptr", + srcs = ["generic_atomicptr_unsafe.go"], + types = [ + "Value", + ], + visibility = ["//:sandbox"], +) + go_template_instance( name = "atomicptr_int", out = "atomicptr_int_unsafe.go", package = "atomicptr", suffix = "Int", - template = "//pkg/sync:generic_atomicptr", + template = ":generic_atomicptr", types = { "Value": "int", }, diff --git a/pkg/sync/atomicptrtest/atomicptr_test.go b/pkg/sync/atomicptr/atomicptr_test.go index 8fdc5112e..8fdc5112e 100644 --- a/pkg/sync/atomicptrtest/atomicptr_test.go +++ b/pkg/sync/atomicptr/atomicptr_test.go diff --git a/pkg/sync/generic_atomicptr_unsafe.go b/pkg/sync/atomicptr/generic_atomicptr_unsafe.go index 82b6df18c..82b6df18c 100644 --- a/pkg/sync/generic_atomicptr_unsafe.go +++ b/pkg/sync/atomicptr/generic_atomicptr_unsafe.go diff --git a/pkg/sync/atomicptrmaptest/BUILD b/pkg/sync/atomicptrmap/BUILD index 3f71ae97d..b0e218c79 100644 --- a/pkg/sync/atomicptrmaptest/BUILD +++ b/pkg/sync/atomicptrmap/BUILD @@ -1,17 +1,36 @@ load("//tools:defs.bzl", "go_library", "go_test") -load("//tools/go_generics:defs.bzl", "go_template_instance") +load("//tools/go_generics:defs.bzl", "go_template", "go_template_instance") package( default_visibility = ["//visibility:private"], licenses = ["notice"], ) +go_template( + name = "generic_atomicptrmap", + srcs = ["generic_atomicptrmap_unsafe.go"], + opt_consts = [ + "ShardOrder", + ], + opt_types = [ + "Hasher", + ], + types = [ + "Key", + "Value", + ], + deps = [ + "//pkg/gohacks", + "//pkg/sync", + ], +) + go_template_instance( name = "test_atomicptrmap", out = "test_atomicptrmap_unsafe.go", package = "atomicptrmap", prefix = "test", - template = "//pkg/sync:generic_atomicptrmap", + template = ":generic_atomicptrmap", types = { "Key": "int64", "Value": "testValue", @@ -27,7 +46,7 @@ go_template_instance( package = "atomicptrmap", prefix = "test", suffix = "Sharded", - template = "//pkg/sync:generic_atomicptrmap", + template = ":generic_atomicptrmap", types = { "Key": "int64", "Value": "testValue", diff --git a/pkg/sync/atomicptrmaptest/atomicptrmap.go b/pkg/sync/atomicptrmap/atomicptrmap.go index 867821ce9..867821ce9 100644 --- a/pkg/sync/atomicptrmaptest/atomicptrmap.go +++ b/pkg/sync/atomicptrmap/atomicptrmap.go diff --git a/pkg/sync/atomicptrmaptest/atomicptrmap_test.go b/pkg/sync/atomicptrmap/atomicptrmap_test.go index 75a9997ef..75a9997ef 100644 --- a/pkg/sync/atomicptrmaptest/atomicptrmap_test.go +++ b/pkg/sync/atomicptrmap/atomicptrmap_test.go diff --git a/pkg/sync/generic_atomicptrmap_unsafe.go b/pkg/sync/atomicptrmap/generic_atomicptrmap_unsafe.go index 3e98cb309..3e98cb309 100644 --- a/pkg/sync/generic_atomicptrmap_unsafe.go +++ b/pkg/sync/atomicptrmap/generic_atomicptrmap_unsafe.go diff --git a/pkg/sync/seqatomictest/BUILD b/pkg/sync/seqatomic/BUILD index 5f9164117..60f79ab54 100644 --- a/pkg/sync/seqatomictest/BUILD +++ b/pkg/sync/seqatomic/BUILD @@ -1,14 +1,27 @@ load("//tools:defs.bzl", "go_library", "go_test") -load("//tools/go_generics:defs.bzl", "go_template_instance") +load("//tools/go_generics:defs.bzl", "go_template", "go_template_instance") package(licenses = ["notice"]) +go_template( + name = "generic_seqatomic", + srcs = ["generic_seqatomic_unsafe.go"], + types = [ + "Value", + ], + visibility = ["//:sandbox"], + deps = [ + ":sync", + "//pkg/gohacks", + ], +) + go_template_instance( name = "seqatomic_int", out = "seqatomic_int_unsafe.go", package = "seqatomic", suffix = "Int", - template = "//pkg/sync:generic_seqatomic", + template = ":generic_seqatomic", types = { "Value": "int", }, diff --git a/pkg/sync/generic_seqatomic_unsafe.go b/pkg/sync/seqatomic/generic_seqatomic_unsafe.go index 9578c9c52..9578c9c52 100644 --- a/pkg/sync/generic_seqatomic_unsafe.go +++ b/pkg/sync/seqatomic/generic_seqatomic_unsafe.go diff --git a/pkg/sync/seqatomictest/seqatomic_test.go b/pkg/sync/seqatomic/seqatomic_test.go index 2c4568b07..2c4568b07 100644 --- a/pkg/sync/seqatomictest/seqatomic_test.go +++ b/pkg/sync/seqatomic/seqatomic_test.go diff --git a/pkg/syserror/BUILD b/pkg/syserror/BUILD index 7d2f5adf6..76bee5a64 100644 --- a/pkg/syserror/BUILD +++ b/pkg/syserror/BUILD @@ -1,4 +1,4 @@ -load("//tools:defs.bzl", "go_library", "go_test") +load("//tools:defs.bzl", "go_library") package(licenses = ["notice"]) @@ -8,12 +8,3 @@ go_library( visibility = ["//visibility:public"], deps = ["@org_golang_x_sys//unix:go_default_library"], ) - -go_test( - name = "syserror_test", - srcs = ["syserror_test.go"], - deps = [ - ":syserror", - "@org_golang_x_sys//unix:go_default_library", - ], -) diff --git a/pkg/tcpip/BUILD b/pkg/tcpip/BUILD index ea46c30da..ed4d7e958 100644 --- a/pkg/tcpip/BUILD +++ b/pkg/tcpip/BUILD @@ -39,12 +39,30 @@ go_library( deps_test( name = "netstack_deps_test", allowed = [ + # gVisor deps. + "//pkg/atomicbitops", + "//pkg/buffer", + "//pkg/context", + "//pkg/gohacks", + "//pkg/goid", + "//pkg/ilist", + "//pkg/iovec", + "//pkg/linewriter", + "//pkg/log", + "//pkg/rand", + "//pkg/sleep", + "//pkg/state", + "//pkg/state/wire", + "//pkg/sync", + "//pkg/waiter", + + # Other deps. "@com_github_google_btree//:go_default_library", "@org_golang_x_sys//unix:go_default_library", "@org_golang_x_time//rate:go_default_library", ], allowed_prefixes = [ - "//", + "//pkg/tcpip", "@org_golang_x_sys//internal/unsafeheader", ], targets = [ diff --git a/pkg/tcpip/checker/checker.go b/pkg/tcpip/checker/checker.go index 18e6cc3cd..e0dfe5813 100644 --- a/pkg/tcpip/checker/checker.go +++ b/pkg/tcpip/checker/checker.go @@ -50,7 +50,7 @@ func IPv4(t *testing.T, b []byte, checkers ...NetworkChecker) { ipv4 := header.IPv4(b) if !ipv4.IsValid(len(b)) { - t.Error("Not a valid IPv4 packet") + t.Fatalf("Not a valid IPv4 packet: %x", ipv4) } if !ipv4.IsChecksumValid() { @@ -72,7 +72,7 @@ func IPv6(t *testing.T, b []byte, checkers ...NetworkChecker) { ipv6 := header.IPv6(b) if !ipv6.IsValid(len(b)) { - t.Error("Not a valid IPv6 packet") + t.Fatalf("Not a valid IPv6 packet: %x", ipv6) } for _, f := range checkers { @@ -701,7 +701,7 @@ func TCPTimestampChecker(wantTS bool, wantTSVal uint32, wantTSEcr uint32) Transp if !ok { return } - opts := []byte(tcp.Options()) + opts := tcp.Options() limit := len(opts) foundTS := false tsVal := uint32(0) @@ -748,12 +748,6 @@ func TCPTimestampChecker(wantTS bool, wantTSVal uint32, wantTSEcr uint32) Transp } } -// TCPNoSACKBlockChecker creates a checker that verifies that the segment does -// not contain any SACK blocks in the TCP options. -func TCPNoSACKBlockChecker() TransportChecker { - return TCPSACKBlockChecker(nil) -} - // TCPSACKBlockChecker creates a checker that verifies that the segment does // contain the specified SACK blocks in the TCP options. func TCPSACKBlockChecker(sackBlocks []header.SACKBlock) TransportChecker { @@ -765,7 +759,7 @@ func TCPSACKBlockChecker(sackBlocks []header.SACKBlock) TransportChecker { } var gotSACKBlocks []header.SACKBlock - opts := []byte(tcp.Options()) + opts := tcp.Options() limit := len(opts) for i := 0; i < limit; { switch opts[i] { diff --git a/pkg/tcpip/faketime/faketime.go b/pkg/tcpip/faketime/faketime.go index fb819d7a8..9f8f51647 100644 --- a/pkg/tcpip/faketime/faketime.go +++ b/pkg/tcpip/faketime/faketime.go @@ -29,14 +29,14 @@ type NullClock struct{} var _ tcpip.Clock = (*NullClock)(nil) -// NowNanoseconds implements tcpip.Clock.NowNanoseconds. -func (*NullClock) NowNanoseconds() int64 { - return 0 +// Now implements tcpip.Clock.Now. +func (*NullClock) Now() time.Time { + return time.Time{} } // NowMonotonic implements tcpip.Clock.NowMonotonic. -func (*NullClock) NowMonotonic() int64 { - return 0 +func (*NullClock) NowMonotonic() tcpip.MonotonicTime { + return tcpip.MonotonicTime{} } // AfterFunc implements tcpip.Clock.AfterFunc. @@ -118,16 +118,17 @@ func NewManualClock() *ManualClock { var _ tcpip.Clock = (*ManualClock)(nil) -// NowNanoseconds implements tcpip.Clock.NowNanoseconds. -func (mc *ManualClock) NowNanoseconds() int64 { +// Now implements tcpip.Clock.Now. +func (mc *ManualClock) Now() time.Time { mc.mu.RLock() defer mc.mu.RUnlock() - return mc.mu.now.UnixNano() + return mc.mu.now } // NowMonotonic implements tcpip.Clock.NowMonotonic. -func (mc *ManualClock) NowMonotonic() int64 { - return mc.NowNanoseconds() +func (mc *ManualClock) NowMonotonic() tcpip.MonotonicTime { + var mt tcpip.MonotonicTime + return mt.Add(mc.Now().Sub(time.Unix(0, 0))) } // AfterFunc implements tcpip.Clock.AfterFunc. @@ -218,6 +219,12 @@ func (mc *ManualClock) stopTimerLocked(mt *manualTimer) { } } +// RunImmediatelyScheduledJobs runs all jobs scheduled to run at the current +// time. +func (mc *ManualClock) RunImmediatelyScheduledJobs() { + mc.Advance(0) +} + // Advance executes all work that have been scheduled to execute within d from // the current time. Blocks until all work has completed execution. func (mc *ManualClock) Advance(d time.Duration) { diff --git a/pkg/tcpip/faketime/faketime_test.go b/pkg/tcpip/faketime/faketime_test.go index c2704df2c..fd2bb470a 100644 --- a/pkg/tcpip/faketime/faketime_test.go +++ b/pkg/tcpip/faketime/faketime_test.go @@ -26,7 +26,7 @@ func TestManualClockAdvance(t *testing.T) { clock := faketime.NewManualClock() start := clock.NowMonotonic() clock.Advance(timeout) - if got, want := time.Duration(clock.NowMonotonic()-start)*time.Nanosecond, timeout; got != want { + if got, want := clock.NowMonotonic().Sub(start), timeout; got != want { t.Errorf("got = %d, want = %d", got, want) } } @@ -87,7 +87,7 @@ func TestManualClockAfterFunc(t *testing.T) { if got, want := counter2, test.wantCounter2; got != want { t.Errorf("got counter2 = %d, want = %d", got, want) } - if got, want := time.Duration(clock.NowMonotonic()-start)*time.Nanosecond, test.advance; got != want { + if got, want := clock.NowMonotonic().Sub(start), test.advance; got != want { t.Errorf("got elapsed = %d, want = %d", got, want) } }) diff --git a/pkg/tcpip/header/ipv4.go b/pkg/tcpip/header/ipv4.go index 2be21ec75..e9abbb709 100644 --- a/pkg/tcpip/header/ipv4.go +++ b/pkg/tcpip/header/ipv4.go @@ -17,6 +17,7 @@ package header import ( "encoding/binary" "fmt" + "time" "gvisor.dev/gvisor/pkg/tcpip" ) @@ -181,7 +182,7 @@ const ( // ipv4LinkLocalUnicastSubnet is the IPv4 link local unicast subnet as defined // by RFC 3927 section 1. var ipv4LinkLocalUnicastSubnet = func() tcpip.Subnet { - subnet, err := tcpip.NewSubnet("\xa9\xfe\x00\x00", tcpip.AddressMask("\xff\xff\x00\x00")) + subnet, err := tcpip.NewSubnet("\xa9\xfe\x00\x00", "\xff\xff\x00\x00") if err != nil { panic(err) } @@ -191,7 +192,7 @@ var ipv4LinkLocalUnicastSubnet = func() tcpip.Subnet { // ipv4LinkLocalMulticastSubnet is the IPv4 link local multicast subnet as // defined by RFC 5771 section 4. var ipv4LinkLocalMulticastSubnet = func() tcpip.Subnet { - subnet, err := tcpip.NewSubnet("\xe0\x00\x00\x00", tcpip.AddressMask("\xff\xff\xff\x00")) + subnet, err := tcpip.NewSubnet("\xe0\x00\x00\x00", "\xff\xff\xff\x00") if err != nil { panic(err) } @@ -572,7 +573,7 @@ func (o *IPv4OptionGeneric) Type() IPv4OptionType { func (o *IPv4OptionGeneric) Size() uint8 { return uint8(len(*o)) } // Contents implements IPv4Option. -func (o *IPv4OptionGeneric) Contents() []byte { return []byte(*o) } +func (o *IPv4OptionGeneric) Contents() []byte { return *o } // IPv4OptionIterator is an iterator pointing to a specific IP option // at any point of time. It also holds information as to a new options buffer @@ -610,7 +611,7 @@ func (i *IPv4OptionIterator) InitReplacement(option IPv4Option) IPv4Options { // RemainingBuffer returns the remaining (unused) part of the new option buffer, // into which a new option may be written. func (i *IPv4OptionIterator) RemainingBuffer() IPv4Options { - return IPv4Options(i.newOptions[i.writePoint:]) + return i.newOptions[i.writePoint:] } // ConsumeBuffer marks a portion of the new buffer as used. @@ -813,9 +814,12 @@ const ( // ipv4TimestampTime provides the current time as specified in RFC 791. func ipv4TimestampTime(clock tcpip.Clock) uint32 { - const millisecondsPerDay = 24 * 3600 * 1000 - const nanoPerMilli = 1000000 - return uint32((clock.NowNanoseconds() / nanoPerMilli) % millisecondsPerDay) + // Per RFC 791 page 21: + // The Timestamp is a right-justified, 32-bit timestamp in + // milliseconds since midnight UT. + now := clock.Now().UTC() + midnight := now.Truncate(24 * time.Hour) + return uint32(now.Sub(midnight).Milliseconds()) } // IP Timestamp option fields. @@ -843,7 +847,7 @@ func (ts *IPv4OptionTimestamp) Type() IPv4OptionType { return IPv4OptionTimestam func (ts *IPv4OptionTimestamp) Size() uint8 { return uint8(len(*ts)) } // Contents implements IPv4Option. -func (ts *IPv4OptionTimestamp) Contents() []byte { return []byte(*ts) } +func (ts *IPv4OptionTimestamp) Contents() []byte { return *ts } // Pointer returns the pointer field in the IP Timestamp option. func (ts *IPv4OptionTimestamp) Pointer() uint8 { @@ -947,7 +951,7 @@ func (rr *IPv4OptionRecordRoute) Type() IPv4OptionType { return IPv4OptionRecord func (rr *IPv4OptionRecordRoute) Size() uint8 { return uint8(len(*rr)) } // Contents implements IPv4Option. -func (rr *IPv4OptionRecordRoute) Contents() []byte { return []byte(*rr) } +func (rr *IPv4OptionRecordRoute) Contents() []byte { return *rr } // Router Alert option specific related constants. // @@ -992,7 +996,7 @@ func (*IPv4OptionRouterAlert) Type() IPv4OptionType { return IPv4OptionRouterAle func (ra *IPv4OptionRouterAlert) Size() uint8 { return uint8(len(*ra)) } // Contents implements IPv4Option. -func (ra *IPv4OptionRouterAlert) Contents() []byte { return []byte(*ra) } +func (ra *IPv4OptionRouterAlert) Contents() []byte { return *ra } // Value returns the value of the IPv4OptionRouterAlert. func (ra *IPv4OptionRouterAlert) Value() uint16 { diff --git a/pkg/tcpip/header/ndp_options.go b/pkg/tcpip/header/ndp_options.go index 3d1bccd15..d6cad3a94 100644 --- a/pkg/tcpip/header/ndp_options.go +++ b/pkg/tcpip/header/ndp_options.go @@ -77,12 +77,12 @@ const ( // ndpPrefixInformationOnLinkFlagMask is the mask of the On-Link Flag // field in the flags byte within an NDPPrefixInformation. - ndpPrefixInformationOnLinkFlagMask = (1 << 7) + ndpPrefixInformationOnLinkFlagMask = 1 << 7 // ndpPrefixInformationAutoAddrConfFlagMask is the mask of the // Autonomous Address-Configuration flag field in the flags byte within // an NDPPrefixInformation. - ndpPrefixInformationAutoAddrConfFlagMask = (1 << 6) + ndpPrefixInformationAutoAddrConfFlagMask = 1 << 6 // ndpPrefixInformationReserved1FlagsMask is the mask of the Reserved1 // field in the flags byte within an NDPPrefixInformation. @@ -451,7 +451,7 @@ func (o NDPNonceOption) String() string { // Nonce returns the nonce value this option holds. func (o NDPNonceOption) Nonce() []byte { - return []byte(o) + return o } // NDPSourceLinkLayerAddressOption is the NDP Source Link Layer Option diff --git a/pkg/tcpip/header/ndp_router_advert.go b/pkg/tcpip/header/ndp_router_advert.go index bf7610863..7e2f0c797 100644 --- a/pkg/tcpip/header/ndp_router_advert.go +++ b/pkg/tcpip/header/ndp_router_advert.go @@ -19,12 +19,72 @@ import ( "time" ) +// NDPRoutePreference is the preference values for default routers or +// more-specific routes. +// +// As per RFC 4191 section 2.1, +// +// Default router preferences and preferences for more-specific routes +// are encoded the same way. +// +// Preference values are encoded as a two-bit signed integer, as +// follows: +// +// 01 High +// 00 Medium (default) +// 11 Low +// 10 Reserved - MUST NOT be sent +// +// Note that implementations can treat the value as a two-bit signed +// integer. +// +// Having just three values reinforces that they are not metrics and +// more values do not appear to be necessary for reasonable scenarios. +type NDPRoutePreference uint8 + +const ( + // HighRoutePreference indicates a high preference, as per + // RFC 4191 section 2.1. + HighRoutePreference NDPRoutePreference = 0b01 + + // MediumRoutePreference indicates a medium preference, as per + // RFC 4191 section 2.1. + // + // This is the default preference value. + MediumRoutePreference = 0b00 + + // LowRoutePreference indicates a low preference, as per + // RFC 4191 section 2.1. + LowRoutePreference = 0b11 + + // ReservedRoutePreference is a reserved preference value, as per + // RFC 4191 section 2.1. + // + // It MUST NOT be sent. + ReservedRoutePreference = 0b10 +) + // NDPRouterAdvert is an NDP Router Advertisement message. It will only contain // the body of an ICMPv6 packet. // -// See RFC 4861 section 4.2 for more details. +// See RFC 4861 section 4.2 and RFC 4191 section 2.2 for more details. type NDPRouterAdvert []byte +// As per RFC 4191 section 2.2, +// +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type | Code | Checksum | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cur Hop Limit |M|O|H|Prf|Resvd| Router Lifetime | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Reachable Time | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Retrans Timer | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Options ... +// +-+-+-+-+-+-+-+-+-+-+-+- const ( // NDPRAMinimumSize is the minimum size of a valid NDP Router // Advertisement message (body of an ICMPv6 packet). @@ -47,6 +107,14 @@ const ( // within the bit-field/flags byte of an NDPRouterAdvert. ndpRAOtherConfFlagMask = (1 << 6) + // ndpDefaultRouterPreferenceShift is the shift of the Prf (Default Router + // Preference) field within the flags byte of an NDPRouterAdvert. + ndpDefaultRouterPreferenceShift = 3 + + // ndpDefaultRouterPreferenceMask is the mask of the Prf (Default Router + // Preference) field within the flags byte of an NDPRouterAdvert. + ndpDefaultRouterPreferenceMask = (0b11 << ndpDefaultRouterPreferenceShift) + // ndpRARouterLifetimeOffset is the start of the 2-byte Router Lifetime // field within an NDPRouterAdvert. ndpRARouterLifetimeOffset = 2 @@ -80,6 +148,11 @@ func (b NDPRouterAdvert) OtherConfFlag() bool { return b[ndpRAFlagsOffset]&ndpRAOtherConfFlagMask != 0 } +// DefaultRouterPreference returns the Default Router Preference field. +func (b NDPRouterAdvert) DefaultRouterPreference() NDPRoutePreference { + return NDPRoutePreference((b[ndpRAFlagsOffset] & ndpDefaultRouterPreferenceMask) >> ndpDefaultRouterPreferenceShift) +} + // RouterLifetime returns the lifetime associated with the default router. A // value of 0 means the source of the Router Advertisement is not a default // router and SHOULD NOT appear on the default router list. Note, a value of 0 diff --git a/pkg/tcpip/header/ndp_test.go b/pkg/tcpip/header/ndp_test.go index 1b5093e58..8fd1f7d13 100644 --- a/pkg/tcpip/header/ndp_test.go +++ b/pkg/tcpip/header/ndp_test.go @@ -126,36 +126,83 @@ func TestNDPNeighborAdvert(t *testing.T) { } func TestNDPRouterAdvert(t *testing.T) { - b := []byte{ - 64, 128, 1, 2, - 3, 4, 5, 6, - 7, 8, 9, 10, + tests := []struct { + hopLimit uint8 + managedFlag, otherConfFlag bool + prf NDPRoutePreference + routerLifetimeS uint16 + reachableTimeMS, retransTimerMS uint32 + }{ + { + hopLimit: 1, + managedFlag: false, + otherConfFlag: true, + prf: HighRoutePreference, + routerLifetimeS: 2, + reachableTimeMS: 3, + retransTimerMS: 4, + }, + { + hopLimit: 64, + managedFlag: true, + otherConfFlag: false, + prf: LowRoutePreference, + routerLifetimeS: 258, + reachableTimeMS: 78492, + retransTimerMS: 13213, + }, } - ra := NDPRouterAdvert(b) + for i, test := range tests { + t.Run(fmt.Sprintf("%d", i), func(t *testing.T) { + flags := uint8(0) + if test.managedFlag { + flags |= 1 << 7 + } + if test.otherConfFlag { + flags |= 1 << 6 + } + flags |= uint8(test.prf) << 3 - if got := ra.CurrHopLimit(); got != 64 { - t.Errorf("got ra.CurrHopLimit = %d, want = 64", got) - } + b := []byte{ + test.hopLimit, flags, 1, 2, + 3, 4, 5, 6, + 7, 8, 9, 10, + } + binary.BigEndian.PutUint16(b[2:], test.routerLifetimeS) + binary.BigEndian.PutUint32(b[4:], test.reachableTimeMS) + binary.BigEndian.PutUint32(b[8:], test.retransTimerMS) - if got := ra.ManagedAddrConfFlag(); !got { - t.Errorf("got ManagedAddrConfFlag = false, want = true") - } + ra := NDPRouterAdvert(b) - if got := ra.OtherConfFlag(); got { - t.Errorf("got OtherConfFlag = true, want = false") - } + if got := ra.CurrHopLimit(); got != test.hopLimit { + t.Errorf("got ra.CurrHopLimit() = %d, want = %d", got, test.hopLimit) + } - if got, want := ra.RouterLifetime(), time.Second*258; got != want { - t.Errorf("got ra.RouterLifetime = %d, want = %d", got, want) - } + if got := ra.ManagedAddrConfFlag(); got != test.managedFlag { + t.Errorf("got ManagedAddrConfFlag() = %t, want = %t", got, test.managedFlag) + } - if got, want := ra.ReachableTime(), time.Millisecond*50595078; got != want { - t.Errorf("got ra.ReachableTime = %d, want = %d", got, want) - } + if got := ra.OtherConfFlag(); got != test.otherConfFlag { + t.Errorf("got OtherConfFlag() = %t, want = %t", got, test.otherConfFlag) + } + + if got := ra.DefaultRouterPreference(); got != test.prf { + t.Errorf("got DefaultRouterPreference() = %d, want = %d", got, test.prf) + } - if got, want := ra.RetransTimer(), time.Millisecond*117967114; got != want { - t.Errorf("got ra.RetransTimer = %d, want = %d", got, want) + if got, want := ra.RouterLifetime(), time.Second*time.Duration(test.routerLifetimeS); got != want { + t.Errorf("got ra.RouterLifetime() = %d, want = %d", got, want) + } + + if got, want := ra.ReachableTime(), time.Millisecond*time.Duration(test.reachableTimeMS); got != want { + t.Errorf("got ra.ReachableTime() = %d, want = %d", got, want) + } + + if got, want := ra.RetransTimer(), time.Millisecond*time.Duration(test.retransTimerMS); got != want { + t.Errorf("got ra.RetransTimer() = %d, want = %d", got, want) + } + }) } } diff --git a/pkg/tcpip/header/tcp.go b/pkg/tcpip/header/tcp.go index 0df517000..8dabe3354 100644 --- a/pkg/tcpip/header/tcp.go +++ b/pkg/tcpip/header/tcp.go @@ -48,6 +48,16 @@ const ( // TCPFlags is the dedicated type for TCP flags. type TCPFlags uint8 +// Intersects returns true iff there are flags common to both f and o. +func (f TCPFlags) Intersects(o TCPFlags) bool { + return f&o != 0 +} + +// Contains returns true iff all the flags in o are contained within f. +func (f TCPFlags) Contains(o TCPFlags) bool { + return f&o == o +} + // String implements Stringer.String. func (f TCPFlags) String() string { flagsStr := []byte("FSRPAU") diff --git a/pkg/tcpip/link/channel/channel.go b/pkg/tcpip/link/channel/channel.go index ef9126deb..f26c857eb 100644 --- a/pkg/tcpip/link/channel/channel.go +++ b/pkg/tcpip/link/channel/channel.go @@ -288,5 +288,5 @@ func (*Endpoint) ARPHardwareType() header.ARPHardwareType { } // AddHeader implements stack.LinkEndpoint.AddHeader. -func (e *Endpoint) AddHeader(local, remote tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) { +func (*Endpoint) AddHeader(tcpip.LinkAddress, tcpip.LinkAddress, tcpip.NetworkProtocolNumber, *stack.PacketBuffer) { } diff --git a/pkg/tcpip/link/fdbased/endpoint.go b/pkg/tcpip/link/fdbased/endpoint.go index bddb1d0a2..735c28da1 100644 --- a/pkg/tcpip/link/fdbased/endpoint.go +++ b/pkg/tcpip/link/fdbased/endpoint.go @@ -41,7 +41,6 @@ package fdbased import ( "fmt" - "math" "sync/atomic" "golang.org/x/sys/unix" @@ -196,8 +195,12 @@ type Options struct { // option for an FD with a fanoutID already in use by another FD for a different // NIC will return an EINVAL. // +// Since fanoutID must be unique within the network namespace, we start with +// the PID to avoid collisions. The only way to be sure of avoiding collisions +// is to run in a new network namespace. +// // Must be accessed using atomic operations. -var fanoutID int32 = 0 +var fanoutID int32 = int32(unix.Getpid()) // New creates a new fd-based endpoint. // @@ -292,11 +295,6 @@ func createInboundDispatcher(e *endpoint, fd int, isSocket bool, fID int32) (lin } switch sa.(type) { case *unix.SockaddrLinklayer: - // See: PACKET_FANOUT_MAX in net/packet/internal.h - const packetFanoutMax = 1 << 16 - if fID > packetFanoutMax { - return nil, fmt.Errorf("host fanoutID limit exceeded, fanoutID must be <= %d", math.MaxUint16) - } // Enable PACKET_FANOUT mode if the underlying socket is of type // AF_PACKET. We do not enable PACKET_FANOUT_FLAG_DEFRAG as that will // prevent gvisor from receiving fragmented packets and the host does the @@ -317,7 +315,7 @@ func createInboundDispatcher(e *endpoint, fd int, isSocket bool, fID int32) (lin // // See: https://github.com/torvalds/linux/blob/7acac4b3196caee5e21fb5ea53f8bc124e6a16fc/net/packet/af_packet.c#L3881 const fanoutType = unix.PACKET_FANOUT_HASH - fanoutArg := int(fID) | fanoutType<<16 + fanoutArg := (int(fID) & 0xffff) | fanoutType<<16 if err := unix.SetsockoptInt(fd, unix.SOL_PACKET, unix.PACKET_FANOUT, fanoutArg); err != nil { return nil, fmt.Errorf("failed to enable PACKET_FANOUT option: %v", err) } diff --git a/pkg/tcpip/network/arp/BUILD b/pkg/tcpip/network/arp/BUILD index a72eb1aad..6fa1aee18 100644 --- a/pkg/tcpip/network/arp/BUILD +++ b/pkg/tcpip/network/arp/BUILD @@ -28,13 +28,13 @@ go_test( ":arp", "//pkg/tcpip", "//pkg/tcpip/buffer", + "//pkg/tcpip/faketime", "//pkg/tcpip/header", "//pkg/tcpip/link/channel", "//pkg/tcpip/link/sniffer", "//pkg/tcpip/network/ipv4", "//pkg/tcpip/stack", "//pkg/tcpip/testutil", - "//pkg/tcpip/transport/icmp", "@com_github_google_go_cmp//cmp:go_default_library", "@com_github_google_go_cmp//cmp/cmpopts:go_default_library", ], diff --git a/pkg/tcpip/network/arp/arp.go b/pkg/tcpip/network/arp/arp.go index 0efa3a926..6515c31e5 100644 --- a/pkg/tcpip/network/arp/arp.go +++ b/pkg/tcpip/network/arp/arp.go @@ -278,7 +278,7 @@ func (*protocol) ParseAddresses(buffer.View) (src, dst tcpip.Address) { return "", "" } -func (p *protocol) NewEndpoint(nic stack.NetworkInterface, dispatcher stack.TransportDispatcher) stack.NetworkEndpoint { +func (p *protocol) NewEndpoint(nic stack.NetworkInterface, _ stack.TransportDispatcher) stack.NetworkEndpoint { e := &endpoint{ protocol: p, nic: nic, diff --git a/pkg/tcpip/network/arp/arp_test.go b/pkg/tcpip/network/arp/arp_test.go index 94209b026..5fcbfeaa2 100644 --- a/pkg/tcpip/network/arp/arp_test.go +++ b/pkg/tcpip/network/arp/arp_test.go @@ -15,15 +15,14 @@ package arp_test import ( - "context" "fmt" "testing" - "time" "github.com/google/go-cmp/cmp" "github.com/google/go-cmp/cmp/cmpopts" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" + "gvisor.dev/gvisor/pkg/tcpip/faketime" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/pkg/tcpip/link/channel" "gvisor.dev/gvisor/pkg/tcpip/link/sniffer" @@ -31,7 +30,6 @@ import ( "gvisor.dev/gvisor/pkg/tcpip/network/ipv4" "gvisor.dev/gvisor/pkg/tcpip/stack" "gvisor.dev/gvisor/pkg/tcpip/testutil" - "gvisor.dev/gvisor/pkg/tcpip/transport/icmp" ) const ( @@ -39,15 +37,6 @@ const ( stackLinkAddr = tcpip.LinkAddress("\x0a\x0a\x0b\x0b\x0c\x0c") remoteLinkAddr = tcpip.LinkAddress("\x01\x02\x03\x04\x05\x06") - - defaultChannelSize = 1 - defaultMTU = 65536 - - // eventChanSize defines the size of event channels used by the neighbor - // cache's event dispatcher. The size chosen here needs to be sufficient to - // queue all the events received during tests before consumption. - // If eventChanSize is too small, the tests may deadlock. - eventChanSize = 32 ) var ( @@ -123,24 +112,6 @@ func (d *arpDispatcher) OnNeighborRemoved(nicID tcpip.NICID, entry stack.Neighbo d.C <- e } -func (d *arpDispatcher) waitForEvent(ctx context.Context, want eventInfo) error { - select { - case got := <-d.C: - if diff := cmp.Diff(want, got, cmp.AllowUnexported(got), cmpopts.IgnoreFields(stack.NeighborEntry{}, "UpdatedAtNanos")); diff != "" { - return fmt.Errorf("got invalid event (-want +got):\n%s", diff) - } - case <-ctx.Done(): - return fmt.Errorf("%s for %s", ctx.Err(), want) - } - return nil -} - -func (d *arpDispatcher) waitForEventWithTimeout(want eventInfo, timeout time.Duration) error { - ctx, cancel := context.WithTimeout(context.Background(), timeout) - defer cancel() - return d.waitForEvent(ctx, want) -} - func (d *arpDispatcher) nextEvent() (eventInfo, bool) { select { case event := <-d.C: @@ -153,55 +124,45 @@ func (d *arpDispatcher) nextEvent() (eventInfo, bool) { type testContext struct { s *stack.Stack linkEP *channel.Endpoint - nudDisp *arpDispatcher + nudDisp arpDispatcher } -func newTestContext(t *testing.T) *testContext { - c := stack.DefaultNUDConfigurations() - // Transition from Reachable to Stale almost immediately to test if receiving - // probes refreshes positive reachability. - c.BaseReachableTime = time.Microsecond - - d := arpDispatcher{ - // Create an event channel large enough so the neighbor cache doesn't block - // while dispatching events. Blocking could interfere with the timing of - // NUD transitions. - C: make(chan eventInfo, eventChanSize), +func makeTestContext(t *testing.T, eventDepth int, packetDepth int) testContext { + t.Helper() + + tc := testContext{ + nudDisp: arpDispatcher{ + C: make(chan eventInfo, eventDepth), + }, } - s := stack.New(stack.Options{ - NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol, arp.NewProtocol}, - TransportProtocols: []stack.TransportProtocolFactory{icmp.NewProtocol4}, - NUDConfigs: c, - NUDDisp: &d, + tc.s = stack.New(stack.Options{ + NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol, arp.NewProtocol}, + NUDDisp: &tc.nudDisp, + Clock: &faketime.NullClock{}, }) - ep := channel.New(defaultChannelSize, defaultMTU, stackLinkAddr) - ep.LinkEPCapabilities |= stack.CapabilityResolutionRequired - - wep := stack.LinkEndpoint(ep) + tc.linkEP = channel.New(packetDepth, header.IPv4MinimumMTU, stackLinkAddr) + tc.linkEP.LinkEPCapabilities |= stack.CapabilityResolutionRequired + wep := stack.LinkEndpoint(tc.linkEP) if testing.Verbose() { - wep = sniffer.New(ep) + wep = sniffer.New(wep) } - if err := s.CreateNIC(nicID, wep); err != nil { - t.Fatalf("CreateNIC failed: %v", err) + if err := tc.s.CreateNIC(nicID, wep); err != nil { + t.Fatalf("CreateNIC failed: %s", err) } - if err := s.AddAddress(nicID, ipv4.ProtocolNumber, stackAddr); err != nil { - t.Fatalf("AddAddress for ipv4 failed: %v", err) + if err := tc.s.AddAddress(nicID, ipv4.ProtocolNumber, stackAddr); err != nil { + t.Fatalf("AddAddress for ipv4 failed: %s", err) } - s.SetRouteTable([]tcpip.Route{{ + tc.s.SetRouteTable([]tcpip.Route{{ Destination: header.IPv4EmptySubnet, NIC: nicID, }}) - return &testContext{ - s: s, - linkEP: ep, - nudDisp: &d, - } + return tc } func (c *testContext) cleanup() { @@ -209,7 +170,7 @@ func (c *testContext) cleanup() { } func TestMalformedPacket(t *testing.T) { - c := newTestContext(t) + c := makeTestContext(t, 0, 0) defer c.cleanup() v := make(buffer.View, header.ARPSize) @@ -228,7 +189,7 @@ func TestMalformedPacket(t *testing.T) { } func TestDisabledEndpoint(t *testing.T) { - c := newTestContext(t) + c := makeTestContext(t, 0, 0) defer c.cleanup() ep, err := c.s.GetNetworkEndpoint(nicID, header.ARPProtocolNumber) @@ -253,7 +214,7 @@ func TestDisabledEndpoint(t *testing.T) { } func TestDirectReply(t *testing.T) { - c := newTestContext(t) + c := makeTestContext(t, 0, 0) defer c.cleanup() const senderMAC = "\x01\x02\x03\x04\x05\x06" @@ -284,7 +245,7 @@ func TestDirectReply(t *testing.T) { } func TestDirectRequest(t *testing.T) { - c := newTestContext(t) + c := makeTestContext(t, 1, 1) defer c.cleanup() tests := []struct { @@ -391,17 +352,21 @@ func TestDirectRequest(t *testing.T) { } // Verify the sender was saved in the neighbor cache. - wantEvent := eventInfo{ - eventType: entryAdded, - nicID: nicID, - entry: stack.NeighborEntry{ - Addr: test.senderAddr, - LinkAddr: tcpip.LinkAddress(test.senderLinkAddr), - State: stack.Stale, - }, - } - if err := c.nudDisp.waitForEventWithTimeout(wantEvent, time.Second); err != nil { - t.Fatal(err) + if got, ok := c.nudDisp.nextEvent(); ok { + want := eventInfo{ + eventType: entryAdded, + nicID: nicID, + entry: stack.NeighborEntry{ + Addr: test.senderAddr, + LinkAddr: test.senderLinkAddr, + State: stack.Stale, + }, + } + if diff := cmp.Diff(want, got, cmp.AllowUnexported(eventInfo{}), cmpopts.IgnoreFields(stack.NeighborEntry{}, "UpdatedAt")); diff != "" { + t.Errorf("got invalid event (-want +got):\n%s", diff) + } + } else { + t.Fatal("event didn't arrive") } neighbors, err := c.s.Neighbors(nicID, ipv4.ProtocolNumber) @@ -589,7 +554,7 @@ func TestLinkAddressRequest(t *testing.T) { s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{arp.NewProtocol, ipv4.NewProtocol}, }) - linkEP := channel.New(defaultChannelSize, defaultMTU, stackLinkAddr) + linkEP := channel.New(1, header.IPv4MinimumMTU, stackLinkAddr) if err := s.CreateNIC(nicID, &testLinkEndpoint{LinkEndpoint: linkEP, writeErr: test.linkErr}); err != nil { t.Fatalf("s.CreateNIC(%d, _): %s", nicID, err) } @@ -663,15 +628,16 @@ func TestLinkAddressRequest(t *testing.T) { } func TestDADARPRequestPacket(t *testing.T) { + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{arp.NewProtocolWithOptions(arp.Options{ DADConfigs: stack.DADConfigurations{ DupAddrDetectTransmits: 1, - RetransmitTimer: time.Second, }, }), ipv4.NewProtocol}, + Clock: clock, }) - e := channel.New(1, defaultMTU, stackLinkAddr) + e := channel.New(1, header.IPv4MinimumMTU, stackLinkAddr) if err := s.CreateNIC(nicID, e); err != nil { t.Fatalf("s.CreateNIC(%d, _): %s", nicID, err) } @@ -682,7 +648,8 @@ func TestDADARPRequestPacket(t *testing.T) { t.Fatalf("got s.CheckDuplicateAddress(%d, %d, %s, _) = %d, want = %d", nicID, header.IPv4ProtocolNumber, remoteAddr, res, stack.DADStarting) } - pkt, ok := e.ReadContext(context.Background()) + clock.RunImmediatelyScheduledJobs() + pkt, ok := e.Read() if !ok { t.Fatal("expected to send an ARP request") } diff --git a/pkg/tcpip/network/internal/fragmentation/fragmentation.go b/pkg/tcpip/network/internal/fragmentation/fragmentation.go index 5168f5361..1ba4d0d36 100644 --- a/pkg/tcpip/network/internal/fragmentation/fragmentation.go +++ b/pkg/tcpip/network/internal/fragmentation/fragmentation.go @@ -251,7 +251,7 @@ func (f *Fragmentation) releaseReassemblersLocked() { // The list is empty. break } - elapsed := time.Duration(now-r.creationTime) * time.Nanosecond + elapsed := now.Sub(r.createdAt) if f.timeout > elapsed { // If the oldest reassembler has not expired, schedule the release // job so that this function is called back when it has expired. diff --git a/pkg/tcpip/network/internal/fragmentation/fragmentation_test.go b/pkg/tcpip/network/internal/fragmentation/fragmentation_test.go index 7daf64b4a..dadfc28cc 100644 --- a/pkg/tcpip/network/internal/fragmentation/fragmentation_test.go +++ b/pkg/tcpip/network/internal/fragmentation/fragmentation_test.go @@ -275,15 +275,23 @@ func TestMemoryLimits(t *testing.T) { highLimit := 3 * lowLimit // Allow at most 3 such packets. f := NewFragmentation(minBlockSize, highLimit, lowLimit, reassembleTimeout, &faketime.NullClock{}, nil) // Send first fragment with id = 0. - f.Process(FragmentID{ID: 0}, 0, 0, true, 0xFF, pkt(1, "0")) + if _, _, _, err := f.Process(FragmentID{ID: 0}, 0, 0, true, 0xFF, pkt(1, "0")); err != nil { + t.Fatal(err) + } // Send first fragment with id = 1. - f.Process(FragmentID{ID: 1}, 0, 0, true, 0xFF, pkt(1, "1")) + if _, _, _, err := f.Process(FragmentID{ID: 1}, 0, 0, true, 0xFF, pkt(1, "1")); err != nil { + t.Fatal(err) + } // Send first fragment with id = 2. - f.Process(FragmentID{ID: 2}, 0, 0, true, 0xFF, pkt(1, "2")) + if _, _, _, err := f.Process(FragmentID{ID: 2}, 0, 0, true, 0xFF, pkt(1, "2")); err != nil { + t.Fatal(err) + } // Send first fragment with id = 3. This should caused id = 0 and id = 1 to be // evicted. - f.Process(FragmentID{ID: 3}, 0, 0, true, 0xFF, pkt(1, "3")) + if _, _, _, err := f.Process(FragmentID{ID: 3}, 0, 0, true, 0xFF, pkt(1, "3")); err != nil { + t.Fatal(err) + } if _, ok := f.reassemblers[FragmentID{ID: 0}]; ok { t.Errorf("Memory limits are not respected: id=0 has not been evicted.") @@ -300,9 +308,13 @@ func TestMemoryLimitsIgnoresDuplicates(t *testing.T) { memSize := pkt(1, "0").MemSize() f := NewFragmentation(minBlockSize, memSize, 0, reassembleTimeout, &faketime.NullClock{}, nil) // Send first fragment with id = 0. - f.Process(FragmentID{}, 0, 0, true, 0xFF, pkt(1, "0")) + if _, _, _, err := f.Process(FragmentID{}, 0, 0, true, 0xFF, pkt(1, "0")); err != nil { + t.Fatal(err) + } // Send the same packet again. - f.Process(FragmentID{}, 0, 0, true, 0xFF, pkt(1, "0")) + if _, _, _, err := f.Process(FragmentID{}, 0, 0, true, 0xFF, pkt(1, "0")); err != nil { + t.Fatal(err) + } if got, want := f.memSize, memSize; got != want { t.Errorf("Wrong size, duplicates are not handled correctly: got=%d, want=%d.", got, want) diff --git a/pkg/tcpip/network/internal/fragmentation/reassembler.go b/pkg/tcpip/network/internal/fragmentation/reassembler.go index 56b76a284..5b7e4b361 100644 --- a/pkg/tcpip/network/internal/fragmentation/reassembler.go +++ b/pkg/tcpip/network/internal/fragmentation/reassembler.go @@ -35,21 +35,21 @@ type hole struct { type reassembler struct { reassemblerEntry - id FragmentID - memSize int - proto uint8 - mu sync.Mutex - holes []hole - filled int - done bool - creationTime int64 - pkt *stack.PacketBuffer + id FragmentID + memSize int + proto uint8 + mu sync.Mutex + holes []hole + filled int + done bool + createdAt tcpip.MonotonicTime + pkt *stack.PacketBuffer } func newReassembler(id FragmentID, clock tcpip.Clock) *reassembler { r := &reassembler{ - id: id, - creationTime: clock.NowMonotonic(), + id: id, + createdAt: clock.NowMonotonic(), } r.holes = append(r.holes, hole{ first: 0, diff --git a/pkg/tcpip/network/internal/ip/duplicate_address_detection.go b/pkg/tcpip/network/internal/ip/duplicate_address_detection.go index eed49f5d2..5123b7d6a 100644 --- a/pkg/tcpip/network/internal/ip/duplicate_address_detection.go +++ b/pkg/tcpip/network/internal/ip/duplicate_address_detection.go @@ -83,6 +83,8 @@ func (d *DAD) Init(protocolMU sync.Locker, configs stack.DADConfigurations, opts panic(fmt.Sprintf("given a non-zero value for NonceSize (%d) but zero for ExtendDADTransmits", opts.NonceSize)) } + configs.Validate() + *d = DAD{ opts: opts, configs: configs, diff --git a/pkg/tcpip/network/internal/ip/duplicate_address_detection_test.go b/pkg/tcpip/network/internal/ip/duplicate_address_detection_test.go index a22b712c6..24687cf06 100644 --- a/pkg/tcpip/network/internal/ip/duplicate_address_detection_test.go +++ b/pkg/tcpip/network/internal/ip/duplicate_address_detection_test.go @@ -133,7 +133,7 @@ func TestDADCheckDuplicateAddress(t *testing.T) { t.Errorf("got dad.checkDuplicateAddress(%s, _) = %d, want = %d", addr1, res, stack.DADDisabled) } // Wait for any initially fired timers to complete. - clock.Advance(0) + clock.RunImmediatelyScheduledJobs() if diff := dad.check(nil); diff != "" { t.Errorf("dad check mismatch (-want +got):\n%s", diff) } @@ -147,7 +147,7 @@ func TestDADCheckDuplicateAddress(t *testing.T) { if res := dad.checkDuplicateAddress(addr1, handler(ch, addr1)); res != stack.DADStarting { t.Errorf("got dad.checkDuplicateAddress(%s, _) = %d, want = %d", addr1, res, stack.DADStarting) } - clock.Advance(0) + clock.RunImmediatelyScheduledJobs() if diff := dad.check([]tcpip.Address{addr1}); diff != "" { t.Errorf("dad check mismatch (-want +got):\n%s", diff) } @@ -156,7 +156,7 @@ func TestDADCheckDuplicateAddress(t *testing.T) { if res := dad.checkDuplicateAddress(addr1, handler(ch, addr1)); res != stack.DADAlreadyRunning { t.Errorf("got dad.checkDuplicateAddress(%s, _) = %d, want = %d", addr1, res, stack.DADAlreadyRunning) } - clock.Advance(0) + clock.RunImmediatelyScheduledJobs() if diff := dad.check(nil); diff != "" { t.Errorf("dad check mismatch (-want +got):\n%s", diff) } @@ -170,7 +170,7 @@ func TestDADCheckDuplicateAddress(t *testing.T) { if res := dad.checkDuplicateAddress(addr2, handler(ch, addr2)); res != stack.DADStarting { t.Errorf("got dad.checkDuplicateAddress(%s, _) = %d, want = %d", addr2, res, stack.DADStarting) } - clock.Advance(0) + clock.RunImmediatelyScheduledJobs() if diff := dad.check([]tcpip.Address{addr2}); diff != "" { t.Errorf("dad check mismatch (-want +got):\n%s", diff) } @@ -208,7 +208,7 @@ func TestDADCheckDuplicateAddress(t *testing.T) { if res := dad.checkDuplicateAddress(addr2, handler(ch, addr2)); res != stack.DADStarting { t.Errorf("got dad.checkDuplicateAddress(%s, _) = %d, want = %d", addr2, res, stack.DADStarting) } - clock.Advance(0) + clock.RunImmediatelyScheduledJobs() if diff := dad.check([]tcpip.Address{addr2, addr2}); diff != "" { t.Errorf("dad check mismatch (-want +got):\n%s", diff) } @@ -247,7 +247,7 @@ func TestDADStop(t *testing.T) { if res := dad.checkDuplicateAddress(addr3, handler(ch, addr3)); res != stack.DADStarting { t.Errorf("got dad.checkDuplicateAddress(%s, _) = %d, want = %d", addr2, res, stack.DADStarting) } - clock.Advance(0) + clock.RunImmediatelyScheduledJobs() if diff := dad.check([]tcpip.Address{addr1, addr2, addr3}); diff != "" { t.Errorf("dad check mismatch (-want +got):\n%s", diff) } @@ -272,7 +272,7 @@ func TestDADStop(t *testing.T) { if res := dad.checkDuplicateAddress(addr1, handler(ch, addr1)); res != stack.DADStarting { t.Errorf("got dad.checkDuplicateAddress(%s, _) = %d, want = %d", addr1, res, stack.DADStarting) } - clock.Advance(0) + clock.RunImmediatelyScheduledJobs() if diff := dad.check([]tcpip.Address{addr1}); diff != "" { t.Errorf("dad check mismatch (-want +got):\n%s", diff) } @@ -347,7 +347,7 @@ func TestNonce(t *testing.T) { t.Errorf("got dad.checkDuplicateAddress(%s, _) = %d, want = %d", addr1, res, stack.DADStarting) } - clock.Advance(0) + clock.RunImmediatelyScheduledJobs() for i, want := range test.expectedResults { if got := dad.extendIfNonceEqual(addr1, test.mockedReceivedNonce); got != want { t.Errorf("(i=%d) got dad.extendIfNonceEqual(%s, _) = %d, want = %d", i, addr1, got, want) diff --git a/pkg/tcpip/network/internal/ip/generic_multicast_protocol.go b/pkg/tcpip/network/internal/ip/generic_multicast_protocol.go index d22974b12..671dfbf32 100644 --- a/pkg/tcpip/network/internal/ip/generic_multicast_protocol.go +++ b/pkg/tcpip/network/internal/ip/generic_multicast_protocol.go @@ -611,7 +611,7 @@ func (g *GenericMulticastProtocolState) setDelayTimerForAddressRLocked(groupAddr // If a timer for any address is already running, it is reset to the new // random value only if the requested Maximum Response Delay is less than // the remaining value of the running timer. - now := time.Unix(0 /* seconds */, g.opts.Clock.NowNanoseconds()) + now := g.opts.Clock.Now() if info.state == delayingMember { if info.delayedReportJobFiresAt.IsZero() { panic(fmt.Sprintf("delayed report unscheduled while in the delaying member state; group = %s", groupAddress)) diff --git a/pkg/tcpip/network/internal/ip/stats.go b/pkg/tcpip/network/internal/ip/stats.go index 0c2b62127..40ab21cb6 100644 --- a/pkg/tcpip/network/internal/ip/stats.go +++ b/pkg/tcpip/network/internal/ip/stats.go @@ -42,6 +42,10 @@ type MultiCounterIPForwardingStats struct { // were too big for the outgoing MTU. PacketTooBig tcpip.MultiCounterStat + // HostUnreachable is the number of IP packets received which could not be + // successfully forwarded due to an unresolvable next hop. + HostUnreachable tcpip.MultiCounterStat + // ExtensionHeaderProblem is the number of IP packets which were dropped // because of a problem encountered when processing an IPv6 extension // header. @@ -61,6 +65,7 @@ func (m *MultiCounterIPForwardingStats) Init(a, b *tcpip.IPForwardingStats) { m.ExtensionHeaderProblem.Init(a.ExtensionHeaderProblem, b.ExtensionHeaderProblem) m.PacketTooBig.Init(a.PacketTooBig, b.PacketTooBig) m.ExhaustedTTL.Init(a.ExhaustedTTL, b.ExhaustedTTL) + m.HostUnreachable.Init(a.HostUnreachable, b.HostUnreachable) } // LINT.ThenChange(:MultiCounterIPForwardingStats, ../../../tcpip.go:IPForwardingStats) diff --git a/pkg/tcpip/network/internal/testutil/BUILD b/pkg/tcpip/network/internal/testutil/BUILD index cec3e62c4..a180e5c75 100644 --- a/pkg/tcpip/network/internal/testutil/BUILD +++ b/pkg/tcpip/network/internal/testutil/BUILD @@ -10,6 +10,7 @@ go_library( "//pkg/tcpip/network/internal/fragmentation:__pkg__", "//pkg/tcpip/network/ipv4:__pkg__", "//pkg/tcpip/network/ipv6:__pkg__", + "//pkg/tcpip/tests/integration:__pkg__", ], deps = [ "//pkg/tcpip", diff --git a/pkg/tcpip/network/ipv4/icmp.go b/pkg/tcpip/network/ipv4/icmp.go index d1a82b584..2aa38eb98 100644 --- a/pkg/tcpip/network/ipv4/icmp.go +++ b/pkg/tcpip/network/ipv4/icmp.go @@ -173,9 +173,8 @@ func (e *endpoint) handleControl(errInfo stack.TransportError, pkt *stack.Packet func (e *endpoint) handleICMP(pkt *stack.PacketBuffer) { received := e.stats.icmp.packetsReceived - // TODO(gvisor.dev/issue/170): ICMP packets don't have their - // TransportHeader fields set. See icmp/protocol.go:protocol.Parse for a - // full explanation. + // ICMP packets don't have their TransportHeader fields set. See + // icmp/protocol.go:protocol.Parse for a full explanation. v, ok := pkt.Data().PullUp(header.ICMPv4MinimumSize) if !ok { received.invalid.Increment() @@ -222,7 +221,6 @@ func (e *endpoint) handleICMP(pkt *stack.PacketBuffer) { _ = e.protocol.returnError(&icmpReasonParamProblem{ pointer: optProblem.Pointer, }, pkt) - e.protocol.stack.Stats().MalformedRcvdPackets.Increment() e.stats.ip.MalformedPacketsReceived.Increment() } return @@ -481,6 +479,22 @@ func (*icmpReasonFragmentationNeeded) isForwarding() bool { return true } +// icmpReasonHostUnreachable is an error in which the host specified in the +// internet destination field of the datagram is unreachable. +type icmpReasonHostUnreachable struct{} + +func (*icmpReasonHostUnreachable) isICMPReason() {} +func (*icmpReasonHostUnreachable) isForwarding() bool { + // If we hit a Host Unreachable error, then we know we are operating as a + // router. As per RFC 792 page 5, Destination Unreachable Message, + // + // In addition, in some networks, the gateway may be able to determine + // if the internet destination host is unreachable. Gateways in these + // networks may send destination unreachable messages to the source host + // when the destination host is unreachable. + return true +} + // returnError takes an error descriptor and generates the appropriate ICMP // error packet for IPv4 and sends it back to the remote device that sent // the problematic packet. It incorporates as much of that packet as @@ -537,7 +551,12 @@ func (p *protocol) returnError(reason icmpReason, pkt *stack.PacketBuffer) tcpip defer route.Release() p.mu.Lock() - netEP, ok := p.mu.eps[pkt.NICID] + // We retrieve an endpoint using the newly constructed route's NICID rather + // than the packet's NICID. The packet's NICID corresponds to the NIC on + // which it arrived, which isn't necessarily the same as the NIC on which it + // will be transmitted. On the other hand, the route's NIC *is* guaranteed + // to be the NIC on which the packet will be transmitted. + netEP, ok := p.mu.eps[route.NICID()] p.mu.Unlock() if !ok { return &tcpip.ErrNotConnected{} @@ -653,6 +672,10 @@ func (p *protocol) returnError(reason icmpReason, pkt *stack.PacketBuffer) tcpip icmpHdr.SetType(header.ICMPv4DstUnreachable) icmpHdr.SetCode(header.ICMPv4NetUnreachable) counter = sent.dstUnreachable + case *icmpReasonHostUnreachable: + icmpHdr.SetType(header.ICMPv4DstUnreachable) + icmpHdr.SetCode(header.ICMPv4HostUnreachable) + counter = sent.dstUnreachable case *icmpReasonFragmentationNeeded: icmpHdr.SetType(header.ICMPv4DstUnreachable) icmpHdr.SetCode(header.ICMPv4FragmentationNeeded) diff --git a/pkg/tcpip/network/ipv4/ipv4.go b/pkg/tcpip/network/ipv4/ipv4.go index 049811cbb..f08b008ac 100644 --- a/pkg/tcpip/network/ipv4/ipv4.go +++ b/pkg/tcpip/network/ipv4/ipv4.go @@ -63,9 +63,15 @@ const ( fragmentblockSize = 8 ) +const ( + forwardingDisabled = 0 + forwardingEnabled = 1 +) + var ipv4BroadcastAddr = header.IPv4Broadcast.WithPrefix() var _ stack.LinkResolvableNetworkEndpoint = (*endpoint)(nil) +var _ stack.ForwardingNetworkEndpoint = (*endpoint)(nil) var _ stack.GroupAddressableEndpoint = (*endpoint)(nil) var _ stack.AddressableEndpoint = (*endpoint)(nil) var _ stack.NetworkEndpoint = (*endpoint)(nil) @@ -76,12 +82,18 @@ type endpoint struct { protocol *protocol stats sharedStats - // enabled is set to 1 when the enpoint is enabled and 0 when it is + // enabled is set to 1 when the endpoint is enabled and 0 when it is // disabled. // // Must be accessed using atomic operations. enabled uint32 + // forwarding is set to forwardingEnabled when the endpoint has forwarding + // enabled and forwardingDisabled when it is disabled. + // + // Must be accessed using atomic operations. + forwarding uint32 + mu struct { sync.RWMutex @@ -92,6 +104,16 @@ type endpoint struct { // HandleLinkResolutionFailure implements stack.LinkResolvableNetworkEndpoint. func (e *endpoint) HandleLinkResolutionFailure(pkt *stack.PacketBuffer) { + // If we are operating as a router, return an ICMP error to the original + // packet's sender. + if pkt.NetworkPacketInfo.IsForwardedPacket { + // TODO(gvisor.dev/issue/6005): Propagate asynchronously generated ICMP + // errors to local endpoints. + e.protocol.returnError(&icmpReasonHostUnreachable{}, pkt) + e.stats.ip.Forwarding.Errors.Increment() + e.stats.ip.Forwarding.HostUnreachable.Increment() + return + } // handleControl expects the entire offending packet to be in the packet // buffer's data field. pkt = stack.NewPacketBuffer(stack.PacketBufferOptions{ @@ -151,14 +173,32 @@ func (p *protocol) forgetEndpoint(nicID tcpip.NICID) { delete(p.mu.eps, nicID) } -// transitionForwarding transitions the endpoint's forwarding status to -// forwarding. +// Forwarding implements stack.ForwardingNetworkEndpoint. +func (e *endpoint) Forwarding() bool { + return atomic.LoadUint32(&e.forwarding) == forwardingEnabled +} + +// setForwarding sets the forwarding status for the endpoint. // -// Must only be called when the forwarding status changes. -func (e *endpoint) transitionForwarding(forwarding bool) { +// Returns true if the forwarding status was updated. +func (e *endpoint) setForwarding(v bool) bool { + forwarding := uint32(forwardingDisabled) + if v { + forwarding = forwardingEnabled + } + + return atomic.SwapUint32(&e.forwarding, forwarding) != forwarding +} + +// SetForwarding implements stack.ForwardingNetworkEndpoint. +func (e *endpoint) SetForwarding(forwarding bool) { e.mu.Lock() defer e.mu.Unlock() + if !e.setForwarding(forwarding) { + return + } + if forwarding { // There does not seem to be an RFC requirement for a node to join the all // routers multicast address but @@ -292,8 +332,8 @@ func (e *endpoint) DefaultTTL() uint8 { return e.protocol.DefaultTTL() } -// MTU implements stack.NetworkEndpoint.MTU. It returns the link-layer MTU minus -// the network layer max header length. +// MTU implements stack.NetworkEndpoint. It returns the link-layer MTU minus the +// network layer max header length. func (e *endpoint) MTU() uint32 { networkMTU, err := calculateNetworkMTU(e.nic.MTU(), header.IPv4MinimumSize) if err != nil { @@ -308,7 +348,7 @@ func (e *endpoint) MaxHeaderLength() uint16 { return e.nic.MaxHeaderLength() + header.IPv4MaximumHeaderSize } -// NetworkProtocolNumber implements stack.NetworkEndpoint.NetworkProtocolNumber. +// NetworkProtocolNumber implements stack.NetworkEndpoint. func (e *endpoint) NetworkProtocolNumber() tcpip.NetworkProtocolNumber { return e.protocol.Number() } @@ -323,7 +363,7 @@ func (e *endpoint) addIPHeader(srcAddr, dstAddr tcpip.Address, pkt *stack.Packet if hdrLen > header.IPv4MaximumHeaderSize { return &tcpip.ErrMessageTooLong{} } - ip := header.IPv4(pkt.NetworkHeader().Push(hdrLen)) + ipH := header.IPv4(pkt.NetworkHeader().Push(hdrLen)) length := pkt.Size() if length > math.MaxUint16 { return &tcpip.ErrMessageTooLong{} @@ -332,7 +372,7 @@ func (e *endpoint) addIPHeader(srcAddr, dstAddr tcpip.Address, pkt *stack.Packet // datagrams. Since the DF bit is never being set here, all datagrams // are non-atomic and need an ID. id := atomic.AddUint32(&e.protocol.ids[hashRoute(srcAddr, dstAddr, params.Protocol, e.protocol.hashIV)%buckets], 1) - ip.Encode(&header.IPv4Fields{ + ipH.Encode(&header.IPv4Fields{ TotalLength: uint16(length), ID: uint16(id), TTL: params.TTL, @@ -342,7 +382,7 @@ func (e *endpoint) addIPHeader(srcAddr, dstAddr tcpip.Address, pkt *stack.Packet DstAddr: dstAddr, Options: options, }) - ip.SetChecksum(^ip.CalculateChecksum()) + ipH.SetChecksum(^ipH.CalculateChecksum()) pkt.NetworkProtocolNumber = ProtocolNumber return nil } @@ -351,7 +391,7 @@ func (e *endpoint) addIPHeader(srcAddr, dstAddr tcpip.Address, pkt *stack.Packet // fragment. It returns the number of fragments handled and the number of // fragments left to be processed. The IP header must already be present in the // original packet. -func (e *endpoint) handleFragments(r *stack.Route, networkMTU uint32, pkt *stack.PacketBuffer, handler func(*stack.PacketBuffer) tcpip.Error) (int, int, tcpip.Error) { +func (e *endpoint) handleFragments(_ *stack.Route, networkMTU uint32, pkt *stack.PacketBuffer, handler func(*stack.PacketBuffer) tcpip.Error) (int, int, tcpip.Error) { // Round the MTU down to align to 8 bytes. fragmentPayloadSize := networkMTU &^ 7 networkHeader := header.IPv4(pkt.NetworkHeader().View()) @@ -389,9 +429,9 @@ func (e *endpoint) WritePacket(r *stack.Route, params stack.NetworkHeaderParams, // based on destination address and do not send the packet to link // layer. // - // TODO(gvisor.dev/issue/170): We should do this for every - // packet, rather than only NATted packets, but removing this check - // short circuits broadcasts before they are sent out to other hosts. + // We should do this for every packet, rather than only NATted packets, but + // removing this check short circuits broadcasts before they are sent out to + // other hosts. if pkt.NatDone { netHeader := header.IPv4(pkt.NetworkHeader().View()) if ep := e.protocol.findEndpointWithAddress(netHeader.DestinationAddress()); ep != nil { @@ -460,7 +500,7 @@ func (e *endpoint) writePacket(r *stack.Route, pkt *stack.PacketBuffer, headerIn return nil } -// WritePackets implements stack.NetworkEndpoint.WritePackets. +// WritePackets implements stack.NetworkEndpoint. func (e *endpoint) WritePackets(r *stack.Route, pkts stack.PacketBufferList, params stack.NetworkHeaderParams) (int, tcpip.Error) { if r.Loop()&stack.PacketLoop != 0 { panic("multiple packets in local loop") @@ -563,34 +603,34 @@ func (e *endpoint) WriteHeaderIncludedPacket(r *stack.Route, pkt *stack.PacketBu if !ok { return &tcpip.ErrMalformedHeader{} } - ip := header.IPv4(h) + ipH := header.IPv4(h) // Always set the total length. pktSize := pkt.Data().Size() - ip.SetTotalLength(uint16(pktSize)) + ipH.SetTotalLength(uint16(pktSize)) // Set the source address when zero. - if ip.SourceAddress() == header.IPv4Any { - ip.SetSourceAddress(r.LocalAddress()) + if ipH.SourceAddress() == header.IPv4Any { + ipH.SetSourceAddress(r.LocalAddress()) } // Set the destination. If the packet already included a destination, it will // be part of the route anyways. - ip.SetDestinationAddress(r.RemoteAddress()) + ipH.SetDestinationAddress(r.RemoteAddress()) // Set the packet ID when zero. - if ip.ID() == 0 { + if ipH.ID() == 0 { // RFC 6864 section 4.3 mandates uniqueness of ID values for // non-atomic datagrams, so assign an ID to all such datagrams // according to the definition given in RFC 6864 section 4. - if ip.Flags()&header.IPv4FlagDontFragment == 0 || ip.Flags()&header.IPv4FlagMoreFragments != 0 || ip.FragmentOffset() > 0 { - ip.SetID(uint16(atomic.AddUint32(&e.protocol.ids[hashRoute(r.LocalAddress(), r.RemoteAddress(), 0 /* protocol */, e.protocol.hashIV)%buckets], 1))) + if ipH.Flags()&header.IPv4FlagDontFragment == 0 || ipH.Flags()&header.IPv4FlagMoreFragments != 0 || ipH.FragmentOffset() > 0 { + ipH.SetID(uint16(atomic.AddUint32(&e.protocol.ids[hashRoute(r.LocalAddress(), r.RemoteAddress(), 0 /* protocol */, e.protocol.hashIV)%buckets], 1))) } } // Always set the checksum. - ip.SetChecksum(0) - ip.SetChecksum(^ip.CalculateChecksum()) + ipH.SetChecksum(0) + ipH.SetChecksum(^ipH.CalculateChecksum()) // Populate the packet buffer's network header and don't allow an invalid // packet to be sent. @@ -680,7 +720,8 @@ func (e *endpoint) forwardPacket(pkt *stack.PacketBuffer) ip.ForwardingError { return nil } - ep.handleValidatedPacket(h, pkt) + // The packet originally arrived on e so provide its NIC as the input NIC. + ep.handleValidatedPacket(h, pkt, e.nic.Name() /* inNICName */) return nil } @@ -796,7 +837,7 @@ func (e *endpoint) HandlePacket(pkt *stack.PacketBuffer) { } } - e.handleValidatedPacket(h, pkt) + e.handleValidatedPacket(h, pkt, e.nic.Name() /* inNICName */) } // handleLocalPacket is like HandlePacket except it does not perform the @@ -815,10 +856,10 @@ func (e *endpoint) handleLocalPacket(pkt *stack.PacketBuffer, canSkipRXChecksum return } - e.handleValidatedPacket(h, pkt) + e.handleValidatedPacket(h, pkt, e.nic.Name() /* inNICName */) } -func (e *endpoint) handleValidatedPacket(h header.IPv4, pkt *stack.PacketBuffer) { +func (e *endpoint) handleValidatedPacket(h header.IPv4, pkt *stack.PacketBuffer, inNICName string) { pkt.NICID = e.nic.ID() stats := e.stats stats.ip.ValidPacketsReceived.Increment() @@ -852,7 +893,7 @@ func (e *endpoint) handleValidatedPacket(h header.IPv4, pkt *stack.PacketBuffer) addressEndpoint.DecRef() pkt.NetworkPacketInfo.LocalAddressBroadcast = subnet.IsBroadcast(dstAddr) || dstAddr == header.IPv4Broadcast } else if !e.IsInGroup(dstAddr) { - if !e.protocol.Forwarding() { + if !e.Forwarding() { stats.ip.InvalidDestinationAddressesReceived.Increment() return } @@ -868,7 +909,6 @@ func (e *endpoint) handleValidatedPacket(h header.IPv4, pkt *stack.PacketBuffer) case *ip.ErrNoRoute: stats.ip.Forwarding.Unrouteable.Increment() case *ip.ErrParameterProblem: - e.protocol.stack.Stats().MalformedRcvdPackets.Increment() stats.ip.MalformedPacketsReceived.Increment() case *ip.ErrMessageTooLong: stats.ip.Forwarding.PacketTooBig.Increment() @@ -881,8 +921,7 @@ func (e *endpoint) handleValidatedPacket(h header.IPv4, pkt *stack.PacketBuffer) // iptables filtering. All packets that reach here are intended for // this machine and will not be forwarded. - inNicName := e.protocol.stack.FindNICNameFromID(e.nic.ID()) - if ok := e.protocol.stack.IPTables().Check(stack.Input, pkt, nil, "" /* preroutingAddr */, inNicName, "" /* outNicName */); !ok { + if ok := e.protocol.stack.IPTables().Check(stack.Input, pkt, nil, "" /* preroutingAddr */, inNICName, "" /* outNicName */); !ok { // iptables is telling us to drop the packet. stats.ip.IPTablesInputDropped.Increment() return @@ -905,7 +944,6 @@ func (e *endpoint) handleValidatedPacket(h header.IPv4, pkt *stack.PacketBuffer) _ = e.protocol.returnError(&icmpReasonParamProblem{ pointer: optProblem.Pointer, }, pkt) - e.protocol.stack.Stats().MalformedRcvdPackets.Increment() e.stats.ip.MalformedPacketsReceived.Increment() } return @@ -955,7 +993,7 @@ func (e *endpoint) handleValidatedPacket(h header.IPv4, pkt *stack.PacketBuffer) // The reassembler doesn't take care of fixing up the header, so we need // to do it here. - h.SetTotalLength(uint16(pkt.Data().Size() + len((h)))) + h.SetTotalLength(uint16(pkt.Data().Size() + len(h))) h.SetFlagsFragmentOffset(0, 0) } stats.ip.PacketsDelivered.Increment() @@ -978,7 +1016,6 @@ func (e *endpoint) handleValidatedPacket(h header.IPv4, pkt *stack.PacketBuffer) _ = e.protocol.returnError(&icmpReasonParamProblem{ pointer: optProblem.Pointer, }, pkt) - e.protocol.stack.Stats().MalformedRcvdPackets.Increment() stats.ip.MalformedPacketsReceived.Increment() } return @@ -1144,7 +1181,6 @@ func (e *endpoint) Stats() stack.NetworkEndpointStats { return &e.stats.localStats } -var _ stack.ForwardingNetworkProtocol = (*protocol)(nil) var _ stack.NetworkProtocol = (*protocol)(nil) var _ fragmentation.TimeoutHandler = (*protocol)(nil) @@ -1165,12 +1201,6 @@ type protocol struct { // Must be accessed using atomic operations. defaultTTL uint32 - // forwarding is set to 1 when the protocol has forwarding enabled and 0 - // when it is disabled. - // - // Must be accessed using atomic operations. - forwarding uint32 - ids []uint32 hashIV uint32 @@ -1194,13 +1224,13 @@ func (p *protocol) DefaultPrefixLen() int { return header.IPv4AddressSize * 8 } -// ParseAddresses implements NetworkProtocol.ParseAddresses. +// ParseAddresses implements stack.NetworkProtocol. func (*protocol) ParseAddresses(v buffer.View) (src, dst tcpip.Address) { h := header.IPv4(v) return h.SourceAddress(), h.DestinationAddress() } -// SetOption implements NetworkProtocol.SetOption. +// SetOption implements stack.NetworkProtocol. func (p *protocol) SetOption(option tcpip.SettableNetworkProtocolOption) tcpip.Error { switch v := option.(type) { case *tcpip.DefaultTTLOption: @@ -1211,7 +1241,7 @@ func (p *protocol) SetOption(option tcpip.SettableNetworkProtocolOption) tcpip.E } } -// Option implements NetworkProtocol.Option. +// Option implements stack.NetworkProtocol. func (p *protocol) Option(option tcpip.GettableNetworkProtocolOption) tcpip.Error { switch v := option.(type) { case *tcpip.DefaultTTLOption: @@ -1232,10 +1262,10 @@ func (p *protocol) DefaultTTL() uint8 { return uint8(atomic.LoadUint32(&p.defaultTTL)) } -// Close implements stack.TransportProtocol.Close. +// Close implements stack.TransportProtocol. func (*protocol) Close() {} -// Wait implements stack.TransportProtocol.Wait. +// Wait implements stack.TransportProtocol. func (*protocol) Wait() {} // parseAndValidate parses the packet (including its transport layer header) and @@ -1273,7 +1303,7 @@ func (p *protocol) parseAndValidate(pkt *stack.PacketBuffer) (header.IPv4, bool) return h, true } -// Parse implements stack.NetworkProtocol.Parse. +// Parse implements stack.NetworkProtocol. func (*protocol) Parse(pkt *stack.PacketBuffer) (proto tcpip.TransportProtocolNumber, hasTransportHdr bool, ok bool) { if ok := parse.IPv4(pkt); !ok { return 0, false, false @@ -1283,35 +1313,6 @@ func (*protocol) Parse(pkt *stack.PacketBuffer) (proto tcpip.TransportProtocolNu return ipHdr.TransportProtocol(), !ipHdr.More() && ipHdr.FragmentOffset() == 0, true } -// Forwarding implements stack.ForwardingNetworkProtocol. -func (p *protocol) Forwarding() bool { - return uint8(atomic.LoadUint32(&p.forwarding)) == 1 -} - -// setForwarding sets the forwarding status for the protocol. -// -// Returns true if the forwarding status was updated. -func (p *protocol) setForwarding(v bool) bool { - if v { - return atomic.CompareAndSwapUint32(&p.forwarding, 0 /* old */, 1 /* new */) - } - return atomic.CompareAndSwapUint32(&p.forwarding, 1 /* old */, 0 /* new */) -} - -// SetForwarding implements stack.ForwardingNetworkProtocol. -func (p *protocol) SetForwarding(v bool) { - p.mu.Lock() - defer p.mu.Unlock() - - if !p.setForwarding(v) { - return - } - - for _, ep := range p.mu.eps { - ep.transitionForwarding(v) - } -} - // calculateNetworkMTU calculates the network-layer payload MTU based on the // link-layer payload mtu. func calculateNetworkMTU(linkMTU, networkHeaderSize uint32) (uint32, tcpip.Error) { @@ -1332,7 +1333,7 @@ func calculateNetworkMTU(linkMTU, networkHeaderSize uint32) (uint32, tcpip.Error networkMTU = MaxTotalSize } - return networkMTU - uint32(networkHeaderSize), nil + return networkMTU - networkHeaderSize, nil } func packetMustBeFragmented(pkt *stack.PacketBuffer, networkMTU uint32) bool { @@ -1741,9 +1742,8 @@ type optionTracker struct { // // If there were no errors during parsing, the new set of options is returned as // a new buffer. -func (e *endpoint) processIPOptions(pkt *stack.PacketBuffer, orig header.IPv4Options, usage optionsUsage) (header.IPv4Options, optionTracker, *header.IPv4OptParameterProblem) { +func (e *endpoint) processIPOptions(pkt *stack.PacketBuffer, opts header.IPv4Options, usage optionsUsage) (header.IPv4Options, optionTracker, *header.IPv4OptParameterProblem) { stats := e.stats.ip - opts := header.IPv4Options(orig) optIter := opts.MakeIterator() // Except NOP, each option must only appear at most once (RFC 791 section 3.1, diff --git a/pkg/tcpip/network/ipv4/ipv4_test.go b/pkg/tcpip/network/ipv4/ipv4_test.go index 5f45b9ee6..4a4448cf9 100644 --- a/pkg/tcpip/network/ipv4/ipv4_test.go +++ b/pkg/tcpip/network/ipv4/ipv4_test.go @@ -16,7 +16,6 @@ package ipv4_test import ( "bytes" - "context" "encoding/hex" "fmt" "io/ioutil" @@ -36,10 +35,10 @@ import ( "gvisor.dev/gvisor/pkg/tcpip/link/loopback" "gvisor.dev/gvisor/pkg/tcpip/link/sniffer" "gvisor.dev/gvisor/pkg/tcpip/network/arp" - "gvisor.dev/gvisor/pkg/tcpip/network/internal/testutil" + iptestutil "gvisor.dev/gvisor/pkg/tcpip/network/internal/testutil" "gvisor.dev/gvisor/pkg/tcpip/network/ipv4" "gvisor.dev/gvisor/pkg/tcpip/stack" - tcptestutil "gvisor.dev/gvisor/pkg/tcpip/testutil" + "gvisor.dev/gvisor/pkg/tcpip/testutil" "gvisor.dev/gvisor/pkg/tcpip/transport/icmp" "gvisor.dev/gvisor/pkg/tcpip/transport/raw" "gvisor.dev/gvisor/pkg/tcpip/transport/tcp" @@ -112,33 +111,29 @@ func TestExcludeBroadcast(t *testing.T) { }) } -type forwardedPacket struct { - fragments []fragmentInfo -} - func TestForwarding(t *testing.T) { const ( - nicID1 = 1 - nicID2 = 2 + incomingNICID = 1 + outgoingNICID = 2 randomSequence = 123 randomIdent = 42 randomTimeOffset = 0x10203040 ) - ipv4Addr1 := tcpip.AddressWithPrefix{ + incomingIPv4Addr := tcpip.AddressWithPrefix{ Address: tcpip.Address(net.ParseIP("10.0.0.1").To4()), PrefixLen: 8, } - ipv4Addr2 := tcpip.AddressWithPrefix{ + outgoingIPv4Addr := tcpip.AddressWithPrefix{ Address: tcpip.Address(net.ParseIP("11.0.0.1").To4()), PrefixLen: 8, } - linkAddr2 := tcpip.LinkAddress("\x02\x03\x03\x04\x05\x06") - remoteIPv4Addr1 := tcpip.Address(net.ParseIP("10.0.0.2").To4()) - remoteIPv4Addr2 := tcpip.Address(net.ParseIP("11.0.0.2").To4()) - unreachableIPv4Addr := tcpip.Address(net.ParseIP("12.0.0.2").To4()) - multicastIPv4Addr := tcpip.Address(net.ParseIP("225.0.0.0").To4()) - linkLocalIPv4Addr := tcpip.Address(net.ParseIP("169.254.0.0").To4()) + outgoingLinkAddr := tcpip.LinkAddress("\x02\x03\x03\x04\x05\x06") + remoteIPv4Addr1 := testutil.MustParse4("10.0.0.2") + remoteIPv4Addr2 := testutil.MustParse4("11.0.0.2") + unreachableIPv4Addr := testutil.MustParse4("12.0.0.2") + multicastIPv4Addr := testutil.MustParse4("225.0.0.0") + linkLocalIPv4Addr := testutil.MustParse4("169.254.0.0") tests := []struct { name string @@ -345,6 +340,7 @@ func TestForwarding(t *testing.T) { for _, test := range tests { t.Run(test.name, func(t *testing.T) { clock := faketime.NewManualClock() + s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol}, TransportProtocols: []stack.TransportProtocolFactory{icmp.NewProtocol4}, @@ -356,36 +352,36 @@ func TestForwarding(t *testing.T) { clock.Advance(time.Millisecond * randomTimeOffset) // We expect at most a single packet in response to our ICMP Echo Request. - e1 := channel.New(1, test.mtu, "") - if err := s.CreateNIC(nicID1, e1); err != nil { - t.Fatalf("CreateNIC(%d, _): %s", nicID1, err) + incomingEndpoint := channel.New(1, test.mtu, "") + if err := s.CreateNIC(incomingNICID, incomingEndpoint); err != nil { + t.Fatalf("CreateNIC(%d, _): %s", incomingNICID, err) } - ipv4ProtoAddr1 := tcpip.ProtocolAddress{Protocol: header.IPv4ProtocolNumber, AddressWithPrefix: ipv4Addr1} - if err := s.AddProtocolAddress(nicID1, ipv4ProtoAddr1); err != nil { - t.Fatalf("AddProtocolAddress(%d, %#v): %s", nicID1, ipv4ProtoAddr1, err) + incomingIPv4ProtoAddr := tcpip.ProtocolAddress{Protocol: header.IPv4ProtocolNumber, AddressWithPrefix: incomingIPv4Addr} + if err := s.AddProtocolAddress(incomingNICID, incomingIPv4ProtoAddr); err != nil { + t.Fatalf("AddProtocolAddress(%d, %#v): %s", incomingNICID, incomingIPv4ProtoAddr, err) } expectedEmittedPacketCount := 1 if len(test.expectedFragmentsForwarded) > expectedEmittedPacketCount { expectedEmittedPacketCount = len(test.expectedFragmentsForwarded) } - e2 := channel.New(expectedEmittedPacketCount, test.mtu, linkAddr2) - if err := s.CreateNIC(nicID2, e2); err != nil { - t.Fatalf("CreateNIC(%d, _): %s", nicID2, err) + outgoingEndpoint := channel.New(expectedEmittedPacketCount, test.mtu, outgoingLinkAddr) + if err := s.CreateNIC(outgoingNICID, outgoingEndpoint); err != nil { + t.Fatalf("CreateNIC(%d, _): %s", outgoingNICID, err) } - ipv4ProtoAddr2 := tcpip.ProtocolAddress{Protocol: header.IPv4ProtocolNumber, AddressWithPrefix: ipv4Addr2} - if err := s.AddProtocolAddress(nicID2, ipv4ProtoAddr2); err != nil { - t.Fatalf("AddProtocolAddress(%d, %#v): %s", nicID2, ipv4ProtoAddr2, err) + outgoingIPv4ProtoAddr := tcpip.ProtocolAddress{Protocol: header.IPv4ProtocolNumber, AddressWithPrefix: outgoingIPv4Addr} + if err := s.AddProtocolAddress(outgoingNICID, outgoingIPv4ProtoAddr); err != nil { + t.Fatalf("AddProtocolAddress(%d, %#v): %s", outgoingNICID, outgoingIPv4ProtoAddr, err) } s.SetRouteTable([]tcpip.Route{ { - Destination: ipv4Addr1.Subnet(), - NIC: nicID1, + Destination: incomingIPv4Addr.Subnet(), + NIC: incomingNICID, }, { - Destination: ipv4Addr2.Subnet(), - NIC: nicID2, + Destination: outgoingIPv4Addr.Subnet(), + NIC: outgoingNICID, }, }) @@ -401,13 +397,13 @@ func TestForwarding(t *testing.T) { totalLength := ipHeaderLength + icmpHeaderLength + test.payloadLength hdr := buffer.NewPrependable(totalLength) hdr.Prepend(test.payloadLength) - icmp := header.ICMPv4(hdr.Prepend(icmpHeaderLength)) - icmp.SetIdent(randomIdent) - icmp.SetSequence(randomSequence) - icmp.SetType(header.ICMPv4Echo) - icmp.SetCode(header.ICMPv4UnusedCode) - icmp.SetChecksum(0) - icmp.SetChecksum(^header.Checksum(icmp, 0)) + icmpH := header.ICMPv4(hdr.Prepend(icmpHeaderLength)) + icmpH.SetIdent(randomIdent) + icmpH.SetSequence(randomSequence) + icmpH.SetType(header.ICMPv4Echo) + icmpH.SetCode(header.ICMPv4UnusedCode) + icmpH.SetChecksum(0) + icmpH.SetChecksum(^header.Checksum(icmpH, 0)) ip := header.IPv4(hdr.Prepend(ipHeaderLength)) ip.Encode(&header.IPv4Fields{ TotalLength: uint16(totalLength), @@ -431,9 +427,10 @@ func TestForwarding(t *testing.T) { Data: hdr.View().ToVectorisedView(), }) requestPkt.NetworkProtocolNumber = header.IPv4ProtocolNumber - e1.InjectInbound(header.IPv4ProtocolNumber, requestPkt) + incomingEndpoint.InjectInbound(header.IPv4ProtocolNumber, requestPkt) + + reply, ok := incomingEndpoint.Read() - reply, ok := e1.Read() if test.expectErrorICMP { if !ok { t.Fatalf("expected ICMP packet type %d through incoming NIC", test.icmpType) @@ -451,15 +448,15 @@ func TestForwarding(t *testing.T) { return len(hdr.View()) } - checker.IPv4(t, header.IPv4(stack.PayloadSince(reply.Pkt.NetworkHeader())), - checker.SrcAddr(ipv4Addr1.Address), + checker.IPv4(t, stack.PayloadSince(reply.Pkt.NetworkHeader()), + checker.SrcAddr(incomingIPv4Addr.Address), checker.DstAddr(test.sourceAddr), checker.TTL(ipv4.DefaultTTL), checker.ICMPv4( checker.ICMPv4Checksum(), checker.ICMPv4Type(test.icmpType), checker.ICMPv4Code(test.icmpCode), - checker.ICMPv4Payload([]byte(hdr.View()[0:expectedICMPPayloadLength()])), + checker.ICMPv4Payload(hdr.View()[:expectedICMPPayloadLength()]), ), ) } else if ok { @@ -468,9 +465,9 @@ func TestForwarding(t *testing.T) { if test.expectPacketForwarded { if len(test.expectedFragmentsForwarded) != 0 { - fragmentedPackets := []*stack.PacketBuffer{} + var fragmentedPackets []*stack.PacketBuffer for i := 0; i < len(test.expectedFragmentsForwarded); i++ { - reply, ok = e2.Read() + reply, ok = outgoingEndpoint.Read() if !ok { t.Fatal("expected ICMP Echo fragment through outgoing NIC") } @@ -485,16 +482,16 @@ func TestForwarding(t *testing.T) { // maximum IP header size and the maximum size allocated for link layer // headers. In this case, no size is allocated for link layer headers. expectedAvailableHeaderBytes := header.IPv4MaximumHeaderSize - if err := compareFragments(fragmentedPackets, requestPkt, uint32(test.mtu), test.expectedFragmentsForwarded, header.ICMPv4ProtocolNumber, true /* withIPHeader */, expectedAvailableHeaderBytes); err != nil { + if err := compareFragments(fragmentedPackets, requestPkt, test.mtu, test.expectedFragmentsForwarded, header.ICMPv4ProtocolNumber, true /* withIPHeader */, expectedAvailableHeaderBytes); err != nil { t.Error(err) } } else { - reply, ok = e2.Read() + reply, ok = outgoingEndpoint.Read() if !ok { t.Fatal("expected ICMP Echo packet through outgoing NIC") } - checker.IPv4(t, header.IPv4(stack.PayloadSince(reply.Pkt.NetworkHeader())), + checker.IPv4(t, stack.PayloadSince(reply.Pkt.NetworkHeader()), checker.SrcAddr(test.sourceAddr), checker.DstAddr(test.destAddr), checker.TTL(test.TTL-1), @@ -508,11 +505,10 @@ func TestForwarding(t *testing.T) { ) } } else { - if reply, ok = e2.Read(); ok { + if reply, ok = outgoingEndpoint.Read(); ok { t.Fatalf("expected no ICMP Echo packet through outgoing NIC, instead found: %#v", reply) } } - boolToInt := func(val bool) uint64 { if val { return 1 @@ -1211,15 +1207,15 @@ func TestIPv4Sanity(t *testing.T) { } totalLen := uint16(ipHeaderLength + header.ICMPv4MinimumSize) hdr := buffer.NewPrependable(int(totalLen)) - icmp := header.ICMPv4(hdr.Prepend(header.ICMPv4MinimumSize)) + icmpH := header.ICMPv4(hdr.Prepend(header.ICMPv4MinimumSize)) // Specify ident/seq to make sure we get the same in the response. - icmp.SetIdent(randomIdent) - icmp.SetSequence(randomSequence) - icmp.SetType(header.ICMPv4Echo) - icmp.SetCode(header.ICMPv4UnusedCode) - icmp.SetChecksum(0) - icmp.SetChecksum(^header.Checksum(icmp, 0)) + icmpH.SetIdent(randomIdent) + icmpH.SetSequence(randomSequence) + icmpH.SetType(header.ICMPv4Echo) + icmpH.SetCode(header.ICMPv4UnusedCode) + icmpH.SetChecksum(0) + icmpH.SetChecksum(^header.Checksum(icmpH, 0)) ip := header.IPv4(hdr.Prepend(ipHeaderLength)) if test.maxTotalLength < totalLen { totalLen = test.maxTotalLength @@ -1314,7 +1310,7 @@ func TestIPv4Sanity(t *testing.T) { checker.ICMPv4Type(test.ICMPType), checker.ICMPv4Code(test.ICMPCode), checker.ICMPv4Pointer(test.paramProblemPointer), - checker.ICMPv4Payload([]byte(hdr.View())), + checker.ICMPv4Payload(hdr.View()), ), ) return @@ -1333,7 +1329,7 @@ func TestIPv4Sanity(t *testing.T) { checker.ICMPv4( checker.ICMPv4Type(test.ICMPType), checker.ICMPv4Code(test.ICMPCode), - checker.ICMPv4Payload([]byte(hdr.View())), + checker.ICMPv4Payload(hdr.View()), ), ) return @@ -1545,9 +1541,9 @@ func TestFragmentationWritePacket(t *testing.T) { for _, ft := range fragmentationTests { t.Run(ft.description, func(t *testing.T) { - ep := testutil.NewMockLinkEndpoint(ft.mtu, nil, math.MaxInt32) + ep := iptestutil.NewMockLinkEndpoint(ft.mtu, nil, math.MaxInt32) r := buildRoute(t, ep) - pkt := testutil.MakeRandPkt(ft.transportHeaderLength, extraHeaderReserve+header.IPv4MinimumSize, []int{ft.payloadSize}, header.IPv4ProtocolNumber) + pkt := iptestutil.MakeRandPkt(ft.transportHeaderLength, extraHeaderReserve+header.IPv4MinimumSize, []int{ft.payloadSize}, header.IPv4ProtocolNumber) source := pkt.Clone() err := r.WritePacket(stack.NetworkHeaderParams{ Protocol: tcp.ProtocolNumber, @@ -1601,7 +1597,7 @@ func TestFragmentationWritePackets(t *testing.T) { insertAfter: 1, }, } - tinyPacket := testutil.MakeRandPkt(header.TCPMinimumSize, extraHeaderReserve+header.IPv4MinimumSize, []int{1}, header.IPv4ProtocolNumber) + tinyPacket := iptestutil.MakeRandPkt(header.TCPMinimumSize, extraHeaderReserve+header.IPv4MinimumSize, []int{1}, header.IPv4ProtocolNumber) for _, test := range writePacketsTests { t.Run(test.description, func(t *testing.T) { @@ -1611,13 +1607,13 @@ func TestFragmentationWritePackets(t *testing.T) { for i := 0; i < test.insertBefore; i++ { pkts.PushBack(tinyPacket.Clone()) } - pkt := testutil.MakeRandPkt(ft.transportHeaderLength, extraHeaderReserve+header.IPv4MinimumSize, []int{ft.payloadSize}, header.IPv4ProtocolNumber) + pkt := iptestutil.MakeRandPkt(ft.transportHeaderLength, extraHeaderReserve+header.IPv4MinimumSize, []int{ft.payloadSize}, header.IPv4ProtocolNumber) pkts.PushBack(pkt.Clone()) for i := 0; i < test.insertAfter; i++ { pkts.PushBack(tinyPacket.Clone()) } - ep := testutil.NewMockLinkEndpoint(ft.mtu, nil, math.MaxInt32) + ep := iptestutil.NewMockLinkEndpoint(ft.mtu, nil, math.MaxInt32) r := buildRoute(t, ep) wantTotalPackets := len(ft.wantFragments) + test.insertBefore + test.insertAfter @@ -1725,8 +1721,8 @@ func TestFragmentationErrors(t *testing.T) { for _, ft := range tests { t.Run(ft.description, func(t *testing.T) { - pkt := testutil.MakeRandPkt(ft.transportHeaderLength, extraHeaderReserve+header.IPv4MinimumSize, []int{ft.payloadSize}, header.IPv4ProtocolNumber) - ep := testutil.NewMockLinkEndpoint(ft.mtu, ft.mockError, ft.allowPackets) + pkt := iptestutil.MakeRandPkt(ft.transportHeaderLength, extraHeaderReserve+header.IPv4MinimumSize, []int{ft.payloadSize}, header.IPv4ProtocolNumber) + ep := iptestutil.NewMockLinkEndpoint(ft.mtu, ft.mockError, ft.allowPackets) r := buildRoute(t, ep) err := r.WritePacket(stack.NetworkHeaderParams{ Protocol: tcp.ProtocolNumber, @@ -2300,7 +2296,7 @@ func TestFragmentReassemblyTimeout(t *testing.T) { checker.ICMPv4Type(header.ICMPv4TimeExceeded), checker.ICMPv4Code(header.ICMPv4ReassemblyTimeout), checker.ICMPv4Checksum(), - checker.ICMPv4Payload([]byte(firstFragmentSent)), + checker.ICMPv4Payload(firstFragmentSent), ), ) }) @@ -2704,7 +2700,7 @@ func TestReceiveFragments(t *testing.T) { TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol}, RawFactory: raw.EndpointFactory{}, }) - e := channel.New(0, 1280, tcpip.LinkAddress("\xf0\x00")) + e := channel.New(0, 1280, "\xf0\x00") if err := s.CreateNIC(nicID, e); err != nil { t.Fatalf("CreateNIC(%d, _) = %s", nicID, err) } @@ -2947,7 +2943,7 @@ func TestWriteStats(t *testing.T) { t.Run(writer.name, func(t *testing.T) { for _, test := range tests { t.Run(test.name, func(t *testing.T) { - ep := testutil.NewMockLinkEndpoint(header.IPv4MinimumMTU, &tcpip.ErrInvalidEndpointState{}, test.allowPackets) + ep := iptestutil.NewMockLinkEndpoint(header.IPv4MinimumMTU, &tcpip.ErrInvalidEndpointState{}, test.allowPackets) rt := buildRoute(t, ep) var pkts stack.PacketBufferList @@ -3034,7 +3030,7 @@ func (lm *limitedMatcher) Match(stack.Hook, *stack.PacketBuffer, string, string) return false, false } -func TestPacketQueing(t *testing.T) { +func TestPacketQueuing(t *testing.T) { const nicID = 1 var ( @@ -3073,7 +3069,7 @@ func TestPacketQueing(t *testing.T) { Length: header.UDPMinimumSize, }) sum := header.PseudoHeaderChecksum(udp.ProtocolNumber, host2IPv4Addr.AddressWithPrefix.Address, host1IPv4Addr.AddressWithPrefix.Address, header.UDPMinimumSize) - sum = header.Checksum(header.UDP([]byte{}), sum) + sum = header.Checksum(nil, sum) u.SetChecksum(^u.CalculateChecksum(sum)) ip := header.IPv4(hdr.Prepend(header.IPv4MinimumSize)) ip.Encode(&header.IPv4Fields{ @@ -3089,7 +3085,7 @@ func TestPacketQueing(t *testing.T) { })) }, checkResp: func(t *testing.T, e *channel.Endpoint) { - p, ok := e.ReadContext(context.Background()) + p, ok := e.Read() if !ok { t.Fatalf("timed out waiting for packet") } @@ -3132,7 +3128,7 @@ func TestPacketQueing(t *testing.T) { })) }, checkResp: func(t *testing.T, e *channel.Endpoint) { - p, ok := e.ReadContext(context.Background()) + p, ok := e.Read() if !ok { t.Fatalf("timed out waiting for packet") } @@ -3156,9 +3152,11 @@ func TestPacketQueing(t *testing.T) { t.Run(test.name, func(t *testing.T) { e := channel.New(1, defaultMTU, host1NICLinkAddr) e.LinkEPCapabilities |= stack.CapabilityResolutionRequired + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{arp.NewProtocol, ipv4.NewProtocol}, TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol}, + Clock: clock, }) if err := s.CreateNIC(nicID, e); err != nil { @@ -3181,7 +3179,8 @@ func TestPacketQueing(t *testing.T) { // Wait for a ARP request since link address resolution should be // performed. { - p, ok := e.ReadContext(context.Background()) + clock.RunImmediatelyScheduledJobs() + p, ok := e.Read() if !ok { t.Fatalf("timed out waiting for packet") } @@ -3222,6 +3221,7 @@ func TestPacketQueing(t *testing.T) { } // Expect the response now that the link address has resolved. + clock.RunImmediatelyScheduledJobs() test.checkResp(t, e) // Since link resolution was already performed, it shouldn't be performed @@ -3243,8 +3243,8 @@ func TestCloseLocking(t *testing.T) { ) var ( - src = tcptestutil.MustParse4("16.0.0.1") - dst = tcptestutil.MustParse4("16.0.0.2") + src = testutil.MustParse4("16.0.0.1") + dst = testutil.MustParse4("16.0.0.2") ) s := stack.New(stack.Options{ @@ -3252,7 +3252,7 @@ func TestCloseLocking(t *testing.T) { TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol}, }) - // Perform NAT so that the endoint tries to search for a sibling endpoint + // Perform NAT so that the endpoint tries to search for a sibling endpoint // which ends up taking the protocol and endpoint lock (in that order). table := stack.Table{ Rules: []stack.Rule{ diff --git a/pkg/tcpip/network/ipv6/icmp.go b/pkg/tcpip/network/ipv6/icmp.go index 4051fda07..94caaae6c 100644 --- a/pkg/tcpip/network/ipv6/icmp.go +++ b/pkg/tcpip/network/ipv6/icmp.go @@ -285,8 +285,8 @@ func isMLDValid(pkt *stack.PacketBuffer, iph header.IPv6, routerAlert *header.IP func (e *endpoint) handleICMP(pkt *stack.PacketBuffer, hasFragmentHeader bool, routerAlert *header.IPv6RouterAlertOption) { sent := e.stats.icmp.packetsSent received := e.stats.icmp.packetsReceived - // TODO(gvisor.dev/issue/170): ICMP packets don't have their TransportHeader - // fields set. See icmp/protocol.go:protocol.Parse for a full explanation. + // ICMP packets don't have their TransportHeader fields set. See + // icmp/protocol.go:protocol.Parse for a full explanation. v, ok := pkt.Data().PullUp(header.ICMPv6HeaderSize) if !ok { received.invalid.Increment() @@ -745,11 +745,7 @@ func (e *endpoint) handleICMP(pkt *stack.PacketBuffer, hasFragmentHeader bool, r return } - stack := e.protocol.stack - - // Is the networking stack operating as a router? - if !stack.Forwarding(ProtocolNumber) { - // ... No, silently drop the packet. + if !e.Forwarding() { received.routerOnlyPacketsDroppedByHost.Increment() return } @@ -1033,6 +1029,26 @@ func (*icmpReasonNetUnreachable) respondsToMulticast() bool { return false } +// icmpReasonHostUnreachable is an error in which the host specified in the +// internet destination field of the datagram is unreachable. +type icmpReasonHostUnreachable struct{} + +func (*icmpReasonHostUnreachable) isICMPReason() {} +func (*icmpReasonHostUnreachable) isForwarding() bool { + // If we hit a Host Unreachable error, then we know we are operating as a + // router. As per RFC 4443 page 8, Destination Unreachable Message, + // + // If the reason for the failure to deliver cannot be mapped to any of + // other codes, the Code field is set to 3. Example of such cases are + // an inability to resolve the IPv6 destination address into a + // corresponding link address, or a link-specific problem of some sort. + return true +} + +func (*icmpReasonHostUnreachable) respondsToMulticast() bool { + return false +} + // icmpReasonFragmentationNeeded is an error where a packet is to big to be sent // out through the outgoing MTU, as per RFC 4443 page 9, Packet Too Big Message. type icmpReasonPacketTooBig struct{} @@ -1147,7 +1163,12 @@ func (p *protocol) returnError(reason icmpReason, pkt *stack.PacketBuffer) tcpip defer route.Release() p.mu.Lock() - netEP, ok := p.mu.eps[pkt.NICID] + // We retrieve an endpoint using the newly constructed route's NICID rather + // than the packet's NICID. The packet's NICID corresponds to the NIC on + // which it arrived, which isn't necessarily the same as the NIC on which it + // will be transmitted. On the other hand, the route's NIC *is* guaranteed + // to be the NIC on which the packet will be transmitted. + netEP, ok := p.mu.eps[route.NICID()] p.mu.Unlock() if !ok { return &tcpip.ErrNotConnected{} @@ -1226,6 +1247,10 @@ func (p *protocol) returnError(reason icmpReason, pkt *stack.PacketBuffer) tcpip icmpHdr.SetType(header.ICMPv6DstUnreachable) icmpHdr.SetCode(header.ICMPv6NetworkUnreachable) counter = sent.dstUnreachable + case *icmpReasonHostUnreachable: + icmpHdr.SetType(header.ICMPv6DstUnreachable) + icmpHdr.SetCode(header.ICMPv6AddressUnreachable) + counter = sent.dstUnreachable case *icmpReasonPacketTooBig: icmpHdr.SetType(header.ICMPv6PacketTooBig) icmpHdr.SetCode(header.ICMPv6UnusedCode) diff --git a/pkg/tcpip/network/ipv6/icmp_test.go b/pkg/tcpip/network/ipv6/icmp_test.go index 040cd4bc8..c2e9544c1 100644 --- a/pkg/tcpip/network/ipv6/icmp_test.go +++ b/pkg/tcpip/network/ipv6/icmp_test.go @@ -16,17 +16,16 @@ package ipv6 import ( "bytes" - "context" "net" "reflect" "strings" "testing" - "time" "github.com/google/go-cmp/cmp" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" "gvisor.dev/gvisor/pkg/tcpip/checker" + "gvisor.dev/gvisor/pkg/tcpip/faketime" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/pkg/tcpip/link/channel" "gvisor.dev/gvisor/pkg/tcpip/link/sniffer" @@ -46,16 +45,12 @@ const ( defaultChannelSize = 1 defaultMTU = 65536 - // Extra time to use when waiting for an async event to occur. - defaultAsyncPositiveEventTimeout = 30 * time.Second - arbitraryHopLimit = 42 ) var ( lladdr0 = header.LinkLocalAddr(linkAddr0) lladdr1 = header.LinkLocalAddr(linkAddr1) - lladdr2 = header.LinkLocalAddr(linkAddr2) ) type stubLinkEndpoint struct { @@ -371,6 +366,8 @@ type testContext struct { linkEP0 *channel.Endpoint linkEP1 *channel.Endpoint + + clock *faketime.ManualClock } type endpointWithResolutionCapability struct { @@ -382,15 +379,19 @@ func (e endpointWithResolutionCapability) Capabilities() stack.LinkEndpointCapab } func newTestContext(t *testing.T) *testContext { + clock := faketime.NewManualClock() c := &testContext{ s0: stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{NewProtocol}, TransportProtocols: []stack.TransportProtocolFactory{icmp.NewProtocol6}, + Clock: clock, }), s1: stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{NewProtocol}, TransportProtocols: []stack.TransportProtocolFactory{icmp.NewProtocol6}, + Clock: clock, }), + clock: clock, } c.linkEP0 = channel.New(defaultChannelSize, defaultMTU, linkAddr0) @@ -457,10 +458,14 @@ type routeArgs struct { remoteLinkAddr tcpip.LinkAddress } -func routeICMPv6Packet(t *testing.T, args routeArgs, fn func(*testing.T, header.ICMPv6)) { +func routeICMPv6Packet(t *testing.T, clock *faketime.ManualClock, args routeArgs, fn func(*testing.T, header.ICMPv6)) { t.Helper() - pi, _ := args.src.ReadContext(context.Background()) + clock.RunImmediatelyScheduledJobs() + pi, ok := args.src.Read() + if !ok { + t.Fatal("packet didn't arrive") + } { pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ @@ -533,7 +538,7 @@ func TestLinkResolution(t *testing.T) { {src: c.linkEP0, dst: c.linkEP1, typ: header.ICMPv6NeighborSolicit, remoteLinkAddr: header.EthernetAddressFromMulticastIPv6Address(header.SolicitedNodeAddr(lladdr1))}, {src: c.linkEP1, dst: c.linkEP0, typ: header.ICMPv6NeighborAdvert}, } { - routeICMPv6Packet(t, args, func(t *testing.T, icmpv6 header.ICMPv6) { + routeICMPv6Packet(t, c.clock, args, func(t *testing.T, icmpv6 header.ICMPv6) { if got, want := tcpip.Address(icmpv6[8:][:16]), lladdr1; got != want { t.Errorf("%d: got target = %s, want = %s", icmpv6.Type(), got, want) } @@ -544,7 +549,7 @@ func TestLinkResolution(t *testing.T) { {src: c.linkEP0, dst: c.linkEP1, typ: header.ICMPv6EchoRequest}, {src: c.linkEP1, dst: c.linkEP0, typ: header.ICMPv6EchoReply}, } { - routeICMPv6Packet(t, args, nil) + routeICMPv6Packet(t, c.clock, args, nil) } } @@ -1309,7 +1314,7 @@ func TestPacketQueing(t *testing.T) { Length: header.UDPMinimumSize, }) sum := header.PseudoHeaderChecksum(udp.ProtocolNumber, host2IPv6Addr.AddressWithPrefix.Address, host1IPv6Addr.AddressWithPrefix.Address, header.UDPMinimumSize) - sum = header.Checksum(header.UDP([]byte{}), sum) + sum = header.Checksum(nil, sum) u.SetChecksum(^u.CalculateChecksum(sum)) payloadLength := hdr.UsedLength() ip := header.IPv6(hdr.Prepend(header.IPv6MinimumSize)) @@ -1325,7 +1330,7 @@ func TestPacketQueing(t *testing.T) { })) }, checkResp: func(t *testing.T, e *channel.Endpoint) { - p, ok := e.ReadContext(context.Background()) + p, ok := e.Read() if !ok { t.Fatalf("timed out waiting for packet") } @@ -1371,7 +1376,7 @@ func TestPacketQueing(t *testing.T) { })) }, checkResp: func(t *testing.T, e *channel.Endpoint) { - p, ok := e.ReadContext(context.Background()) + p, ok := e.Read() if !ok { t.Fatalf("timed out waiting for packet") } @@ -1396,9 +1401,11 @@ func TestPacketQueing(t *testing.T) { e := channel.New(1, header.IPv6MinimumMTU, host1NICLinkAddr) e.LinkEPCapabilities |= stack.CapabilityResolutionRequired + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{NewProtocol}, TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol}, + Clock: clock, }) if err := s.CreateNIC(nicID, e); err != nil { @@ -1421,7 +1428,8 @@ func TestPacketQueing(t *testing.T) { // Wait for a neighbor solicitation since link address resolution should // be performed. { - p, ok := e.ReadContext(context.Background()) + clock.RunImmediatelyScheduledJobs() + p, ok := e.Read() if !ok { t.Fatalf("timed out waiting for packet") } @@ -1475,6 +1483,7 @@ func TestPacketQueing(t *testing.T) { } // Expect the response now that the link address has resolved. + clock.RunImmediatelyScheduledJobs() test.checkResp(t, e) // Since link resolution was already performed, it shouldn't be performed diff --git a/pkg/tcpip/network/ipv6/ipv6.go b/pkg/tcpip/network/ipv6/ipv6.go index f0e06f86b..8c8fafcda 100644 --- a/pkg/tcpip/network/ipv6/ipv6.go +++ b/pkg/tcpip/network/ipv6/ipv6.go @@ -63,6 +63,11 @@ const ( buckets = 2048 ) +const ( + forwardingDisabled = 0 + forwardingEnabled = 1 +) + // policyTable is the default policy table defined in RFC 6724 section 2.1. // // A more human-readable version: @@ -168,6 +173,7 @@ func getLabel(addr tcpip.Address) uint8 { var _ stack.DuplicateAddressDetector = (*endpoint)(nil) var _ stack.LinkAddressResolver = (*endpoint)(nil) var _ stack.LinkResolvableNetworkEndpoint = (*endpoint)(nil) +var _ stack.ForwardingNetworkEndpoint = (*endpoint)(nil) var _ stack.GroupAddressableEndpoint = (*endpoint)(nil) var _ stack.AddressableEndpoint = (*endpoint)(nil) var _ stack.NetworkEndpoint = (*endpoint)(nil) @@ -178,7 +184,6 @@ type endpoint struct { nic stack.NetworkInterface dispatcher stack.TransportDispatcher protocol *protocol - stack *stack.Stack stats sharedStats // enabled is set to 1 when the endpoint is enabled and 0 when it is @@ -187,6 +192,12 @@ type endpoint struct { // Must be accessed using atomic operations. enabled uint32 + // forwarding is set to forwardingEnabled when the endpoint has forwarding + // enabled and forwardingDisabled when it is disabled. + // + // Must be accessed using atomic operations. + forwarding uint32 + mu struct { sync.RWMutex @@ -219,11 +230,11 @@ type endpoint struct { // If the NIC was created with a name, it is passed to NICNameFromID. // // NICNameFromID SHOULD return unique NIC names so unique opaque IIDs are -// generated for the same prefix on differnt NICs. +// generated for the same prefix on different NICs. type NICNameFromID func(tcpip.NICID, string) string // OpaqueInterfaceIdentifierOptions holds the options related to the generation -// of opaque interface indentifiers (IIDs) as defined by RFC 7217. +// of opaque interface identifiers (IIDs) as defined by RFC 7217. type OpaqueInterfaceIdentifierOptions struct { // NICNameFromID is a function that returns a stable name for a specified NIC, // even if the NIC ID changes over time. @@ -270,6 +281,16 @@ func (*endpoint) DuplicateAddressProtocol() tcpip.NetworkProtocolNumber { // HandleLinkResolutionFailure implements stack.LinkResolvableNetworkEndpoint. func (e *endpoint) HandleLinkResolutionFailure(pkt *stack.PacketBuffer) { + // If we are operating as a router, we should return an ICMP error to the + // original packet's sender. + if pkt.NetworkPacketInfo.IsForwardedPacket { + // TODO(gvisor.dev/issue/6005): Propagate asynchronously generated ICMP + // errors to local endpoints. + e.protocol.returnError(&icmpReasonHostUnreachable{}, pkt) + e.stats.ip.Forwarding.Errors.Increment() + e.stats.ip.Forwarding.HostUnreachable.Increment() + return + } // handleControl expects the entire offending packet to be in the packet // buffer's data field. pkt = stack.NewPacketBuffer(stack.PacketBufferOptions{ @@ -405,20 +426,38 @@ func (e *endpoint) dupTentativeAddrDetected(addr tcpip.Address, holderLinkAddr t } } -// transitionForwarding transitions the endpoint's forwarding status to -// forwarding. +// Forwarding implements stack.ForwardingNetworkEndpoint. +func (e *endpoint) Forwarding() bool { + return atomic.LoadUint32(&e.forwarding) == forwardingEnabled +} + +// setForwarding sets the forwarding status for the endpoint. // -// Must only be called when the forwarding status changes. -func (e *endpoint) transitionForwarding(forwarding bool) { +// Returns true if the forwarding status was updated. +func (e *endpoint) setForwarding(v bool) bool { + forwarding := uint32(forwardingDisabled) + if v { + forwarding = forwardingEnabled + } + + return atomic.SwapUint32(&e.forwarding, forwarding) != forwarding +} + +// SetForwarding implements stack.ForwardingNetworkEndpoint. +func (e *endpoint) SetForwarding(forwarding bool) { + e.mu.Lock() + defer e.mu.Unlock() + + if !e.setForwarding(forwarding) { + return + } + allRoutersGroups := [...]tcpip.Address{ header.IPv6AllRoutersInterfaceLocalMulticastAddress, header.IPv6AllRoutersLinkLocalMulticastAddress, header.IPv6AllRoutersSiteLocalMulticastAddress, } - e.mu.Lock() - defer e.mu.Unlock() - if forwarding { // As per RFC 4291 section 2.8: // @@ -506,7 +545,7 @@ func (e *endpoint) Enable() tcpip.Error { // Perform DAD on the all the unicast IPv6 endpoints that are in the permanent // state. // - // Addresses may have aleady completed DAD but in the time since the endpoint + // Addresses may have already completed DAD but in the time since the endpoint // was last enabled, other devices may have acquired the same addresses. var err tcpip.Error e.mu.addressableEndpointState.ForEachEndpoint(func(addressEndpoint stack.AddressEndpoint) bool { @@ -611,8 +650,8 @@ func (e *endpoint) DefaultTTL() uint8 { return e.protocol.DefaultTTL() } -// MTU implements stack.NetworkEndpoint.MTU. It returns the link-layer MTU minus -// the network layer max header length. +// MTU implements stack.NetworkEndpoint. It returns the link-layer MTU minus the +// network layer max header length. func (e *endpoint) MTU() uint32 { networkMTU, err := calculateNetworkMTU(e.nic.MTU(), header.IPv6MinimumSize) if err != nil { @@ -636,8 +675,7 @@ func addIPHeader(srcAddr, dstAddr tcpip.Address, pkt *stack.PacketBuffer, params if length > math.MaxUint16 { return &tcpip.ErrMessageTooLong{} } - ip := header.IPv6(pkt.NetworkHeader().Push(header.IPv6MinimumSize + extHdrsLen)) - ip.Encode(&header.IPv6Fields{ + header.IPv6(pkt.NetworkHeader().Push(header.IPv6MinimumSize + extHdrsLen)).Encode(&header.IPv6Fields{ PayloadLength: uint16(length), TransportProtocol: params.Protocol, HopLimit: params.TTL, @@ -717,9 +755,9 @@ func (e *endpoint) WritePacket(r *stack.Route, params stack.NetworkHeaderParams, // based on destination address and do not send the packet to link // layer. // - // TODO(gvisor.dev/issue/170): We should do this for every - // packet, rather than only NATted packets, but removing this check - // short circuits broadcasts before they are sent out to other hosts. + // We should do this for every packet, rather than only NATted packets, but + // removing this check short circuits broadcasts before they are sent out to + // other hosts. if pkt.NatDone { netHeader := header.IPv6(pkt.NetworkHeader().View()) if ep := e.protocol.findEndpointWithAddress(netHeader.DestinationAddress()); ep != nil { @@ -788,7 +826,7 @@ func (e *endpoint) writePacket(r *stack.Route, pkt *stack.PacketBuffer, protocol return nil } -// WritePackets implements stack.NetworkEndpoint.WritePackets. +// WritePackets implements stack.NetworkEndpoint. func (e *endpoint) WritePackets(r *stack.Route, pkts stack.PacketBufferList, params stack.NetworkHeaderParams) (int, tcpip.Error) { if r.Loop()&stack.PacketLoop != 0 { panic("not implemented") @@ -879,20 +917,20 @@ func (e *endpoint) WriteHeaderIncludedPacket(r *stack.Route, pkt *stack.PacketBu if !ok { return &tcpip.ErrMalformedHeader{} } - ip := header.IPv6(h) + ipH := header.IPv6(h) // Always set the payload length. pktSize := pkt.Data().Size() - ip.SetPayloadLength(uint16(pktSize - header.IPv6MinimumSize)) + ipH.SetPayloadLength(uint16(pktSize - header.IPv6MinimumSize)) // Set the source address when zero. - if ip.SourceAddress() == header.IPv6Any { - ip.SetSourceAddress(r.LocalAddress()) + if ipH.SourceAddress() == header.IPv6Any { + ipH.SetSourceAddress(r.LocalAddress()) } // Set the destination. If the packet already included a destination, it will // be part of the route anyways. - ip.SetDestinationAddress(r.RemoteAddress()) + ipH.SetDestinationAddress(r.RemoteAddress()) // Populate the packet buffer's network header and don't allow an invalid // packet to be sent. @@ -953,7 +991,8 @@ func (e *endpoint) forwardPacket(pkt *stack.PacketBuffer) ip.ForwardingError { return nil } - ep.handleValidatedPacket(h, pkt) + // The packet originally arrived on e so provide its NIC as the input NIC. + ep.handleValidatedPacket(h, pkt, e.nic.Name() /* inNICName */) return nil } @@ -1066,7 +1105,7 @@ func (e *endpoint) HandlePacket(pkt *stack.PacketBuffer) { } } - e.handleValidatedPacket(h, pkt) + e.handleValidatedPacket(h, pkt, e.nic.Name() /* inNICName */) } // handleLocalPacket is like HandlePacket except it does not perform the @@ -1085,10 +1124,10 @@ func (e *endpoint) handleLocalPacket(pkt *stack.PacketBuffer, canSkipRXChecksum return } - e.handleValidatedPacket(h, pkt) + e.handleValidatedPacket(h, pkt, e.nic.Name() /* inNICName */) } -func (e *endpoint) handleValidatedPacket(h header.IPv6, pkt *stack.PacketBuffer) { +func (e *endpoint) handleValidatedPacket(h header.IPv6, pkt *stack.PacketBuffer, inNICName string) { pkt.NICID = e.nic.ID() stats := e.stats.ip stats.ValidPacketsReceived.Increment() @@ -1109,7 +1148,7 @@ func (e *endpoint) handleValidatedPacket(h header.IPv6, pkt *stack.PacketBuffer) if addressEndpoint := e.AcquireAssignedAddress(dstAddr, e.nic.Promiscuous(), stack.CanBePrimaryEndpoint); addressEndpoint != nil { addressEndpoint.DecRef() } else if !e.IsInGroup(dstAddr) { - if !e.protocol.Forwarding() { + if !e.Forwarding() { stats.InvalidDestinationAddressesReceived.Increment() return } @@ -1137,8 +1176,7 @@ func (e *endpoint) handleValidatedPacket(h header.IPv6, pkt *stack.PacketBuffer) // iptables filtering. All packets that reach here are intended for // this machine and need not be forwarded. - inNicName := e.protocol.stack.FindNICNameFromID(e.nic.ID()) - if ok := e.protocol.stack.IPTables().Check(stack.Input, pkt, nil, "" /* preroutingAddr */, inNicName, "" /* outNicName */); !ok { + if ok := e.protocol.stack.IPTables().Check(stack.Input, pkt, nil, "" /* preroutingAddr */, inNICName, "" /* outNicName */); !ok { // iptables is telling us to drop the packet. stats.IPTablesInputDropped.Increment() return @@ -1580,7 +1618,7 @@ func (e *endpoint) Close() { e.protocol.forgetEndpoint(e.nic.ID()) } -// NetworkProtocolNumber implements stack.NetworkEndpoint.NetworkProtocolNumber. +// NetworkProtocolNumber implements stack.NetworkEndpoint. func (e *endpoint) NetworkProtocolNumber() tcpip.NetworkProtocolNumber { return e.protocol.Number() } @@ -1589,8 +1627,8 @@ func (e *endpoint) NetworkProtocolNumber() tcpip.NetworkProtocolNumber { func (e *endpoint) AddAndAcquirePermanentAddress(addr tcpip.AddressWithPrefix, peb stack.PrimaryEndpointBehavior, configType stack.AddressConfigType, deprecated bool) (stack.AddressEndpoint, tcpip.Error) { // TODO(b/169350103): add checks here after making sure we no longer receive // an empty address. - e.mu.RLock() - defer e.mu.RUnlock() + e.mu.Lock() + defer e.mu.Unlock() return e.addAndAcquirePermanentAddressLocked(addr, peb, configType, deprecated) } @@ -1631,8 +1669,8 @@ func (e *endpoint) addAndAcquirePermanentAddressLocked(addr tcpip.AddressWithPre // RemovePermanentAddress implements stack.AddressableEndpoint. func (e *endpoint) RemovePermanentAddress(addr tcpip.Address) tcpip.Error { - e.mu.RLock() - defer e.mu.RUnlock() + e.mu.Lock() + defer e.mu.Unlock() addressEndpoint := e.getAddressRLocked(addr) if addressEndpoint == nil || !addressEndpoint.GetKind().IsPermanent() { @@ -1932,7 +1970,6 @@ func (e *endpoint) Stats() stack.NetworkEndpointStats { return &e.stats.localStats } -var _ stack.ForwardingNetworkProtocol = (*protocol)(nil) var _ stack.NetworkProtocol = (*protocol)(nil) var _ fragmentation.TimeoutHandler = (*protocol)(nil) @@ -1957,12 +1994,6 @@ type protocol struct { // Must be accessed using atomic operations. defaultTTL uint32 - // forwarding is set to 1 when the protocol has forwarding enabled and 0 - // when it is disabled. - // - // Must be accessed using atomic operations. - forwarding uint32 - fragmentation *fragmentation.Fragmentation } @@ -1981,7 +2012,7 @@ func (p *protocol) DefaultPrefixLen() int { return header.IPv6AddressSize * 8 } -// ParseAddresses implements NetworkProtocol.ParseAddresses. +// ParseAddresses implements stack.NetworkProtocol. func (*protocol) ParseAddresses(v buffer.View) (src, dst tcpip.Address) { h := header.IPv6(v) return h.SourceAddress(), h.DestinationAddress() @@ -2058,7 +2089,7 @@ func (p *protocol) forgetEndpoint(nicID tcpip.NICID) { delete(p.mu.eps, nicID) } -// SetOption implements NetworkProtocol.SetOption. +// SetOption implements stack.NetworkProtocol. func (p *protocol) SetOption(option tcpip.SettableNetworkProtocolOption) tcpip.Error { switch v := option.(type) { case *tcpip.DefaultTTLOption: @@ -2069,7 +2100,7 @@ func (p *protocol) SetOption(option tcpip.SettableNetworkProtocolOption) tcpip.E } } -// Option implements NetworkProtocol.Option. +// Option implements stack.NetworkProtocol. func (p *protocol) Option(option tcpip.GettableNetworkProtocolOption) tcpip.Error { switch v := option.(type) { case *tcpip.DefaultTTLOption: @@ -2090,10 +2121,10 @@ func (p *protocol) DefaultTTL() uint8 { return uint8(atomic.LoadUint32(&p.defaultTTL)) } -// Close implements stack.TransportProtocol.Close. +// Close implements stack.TransportProtocol. func (*protocol) Close() {} -// Wait implements stack.TransportProtocol.Wait. +// Wait implements stack.TransportProtocol. func (*protocol) Wait() {} // parseAndValidate parses the packet (including its transport layer header) and @@ -2127,7 +2158,7 @@ func (p *protocol) parseAndValidate(pkt *stack.PacketBuffer) (header.IPv6, bool) return h, true } -// Parse implements stack.NetworkProtocol.Parse. +// Parse implements stack.NetworkProtocol. func (*protocol) Parse(pkt *stack.PacketBuffer) (proto tcpip.TransportProtocolNumber, hasTransportHdr bool, ok bool) { proto, _, fragOffset, fragMore, ok := parse.IPv6(pkt) if !ok { @@ -2137,35 +2168,6 @@ func (*protocol) Parse(pkt *stack.PacketBuffer) (proto tcpip.TransportProtocolNu return proto, !fragMore && fragOffset == 0, true } -// Forwarding implements stack.ForwardingNetworkProtocol. -func (p *protocol) Forwarding() bool { - return uint8(atomic.LoadUint32(&p.forwarding)) == 1 -} - -// setForwarding sets the forwarding status for the protocol. -// -// Returns true if the forwarding status was updated. -func (p *protocol) setForwarding(v bool) bool { - if v { - return atomic.CompareAndSwapUint32(&p.forwarding, 0 /* old */, 1 /* new */) - } - return atomic.CompareAndSwapUint32(&p.forwarding, 1 /* old */, 0 /* new */) -} - -// SetForwarding implements stack.ForwardingNetworkProtocol. -func (p *protocol) SetForwarding(v bool) { - p.mu.Lock() - defer p.mu.Unlock() - - if !p.setForwarding(v) { - return - } - - for _, ep := range p.mu.eps { - ep.transitionForwarding(v) - } -} - // calculateNetworkMTU calculates the network-layer payload MTU based on the // link-layer payload MTU and the length of every IPv6 header. // Note that this is different than the Payload Length field of the IPv6 header, @@ -2186,7 +2188,7 @@ func calculateNetworkMTU(linkMTU, networkHeadersLen uint32) (uint32, tcpip.Error return 0, &tcpip.ErrMalformedHeader{} } - networkMTU := linkMTU - uint32(networkHeadersLen) + networkMTU := linkMTU - networkHeadersLen if networkMTU > maxPayloadSize { networkMTU = maxPayloadSize } @@ -2205,7 +2207,7 @@ type Options struct { // Note, setting this to true does not mean that a link-local address is // assigned right away, or at all. If Duplicate Address Detection is enabled, // an address is only assigned if it successfully resolves. If it fails, no - // further attempts are made to auto-generate a link-local adddress. + // further attempts are made to auto-generate a link-local address. // // The generated link-local address follows RFC 4291 Appendix A guidelines. AutoGenLinkLocal bool @@ -2221,7 +2223,7 @@ type Options struct { // TempIIDSeed is used to seed the initial temporary interface identifier // history value used to generate IIDs for temporary SLAAC addresses. // - // Temporary SLAAC adresses are short-lived addresses which are unpredictable + // Temporary SLAAC addresses are short-lived addresses which are unpredictable // and random from the perspective of other nodes on the network. It is // recommended that the seed be a random byte buffer of at least // header.IIDSize bytes to make sure that temporary SLAAC addresses are diff --git a/pkg/tcpip/network/ipv6/ipv6_test.go b/pkg/tcpip/network/ipv6/ipv6_test.go index 30325160a..d2a23fd4f 100644 --- a/pkg/tcpip/network/ipv6/ipv6_test.go +++ b/pkg/tcpip/network/ipv6/ipv6_test.go @@ -129,7 +129,7 @@ func testReceiveUDP(t *testing.T, s *stack.Stack, e *channel.Endpoint, src, dst sum := header.PseudoHeaderChecksum(udp.ProtocolNumber, src, dst, header.UDPMinimumSize) // UDP checksum - sum = header.Checksum(header.UDP([]byte{}), sum) + sum = header.Checksum(nil, sum) u.SetChecksum(^u.CalculateChecksum(sum)) payloadLength := hdr.UsedLength() @@ -402,7 +402,7 @@ func TestReceiveIPv6ExtHdrs(t *testing.T) { }{ { name: "None", - extHdr: func(nextHdr uint8) ([]byte, uint8) { return []byte{}, nextHdr }, + extHdr: func(nextHdr uint8) ([]byte, uint8) { return nil, nextHdr }, shouldAccept: true, expectICMP: false, }, @@ -612,8 +612,7 @@ func TestReceiveIPv6ExtHdrs(t *testing.T) { { name: "No next header", extHdr: func(nextHdr uint8) ([]byte, uint8) { - return []byte{}, - noNextHdrID + return nil, noNextHdrID }, shouldAccept: false, expectICMP: false, @@ -1160,7 +1159,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { fragmentExtHdrLen+len(ipv6Payload1Addr1ToAddr2), []buffer.View{ // Fragment extension header. - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 0, 0, 0, 0, 0}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 0, 0, 0, 0, 0}, ipv6Payload1Addr1ToAddr2, }, @@ -1180,7 +1179,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { fragmentExtHdrLen+len(ipv6Payload3Addr1ToAddr2), []buffer.View{ // Fragment extension header. - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 0, 0, 0, 0, 0}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 0, 0, 0, 0, 0}, ipv6Payload3Addr1ToAddr2, }, @@ -1202,7 +1201,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1218,7 +1217,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 8, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1240,7 +1239,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 8, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1256,7 +1255,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1278,7 +1277,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1296,7 +1295,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment offset = 8, More = false, ID = 1 // NextHeader value is different than the one in the first fragment, so // this NextHeader should be ignored. - buffer.View([]byte{uint8(header.IPv6NoNextHeaderIdentifier), 0, 0, 64, 0, 0, 0, 1}), + []byte{uint8(header.IPv6NoNextHeaderIdentifier), 0, 0, 64, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1318,7 +1317,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload3Addr1ToAddr2[:64], }, @@ -1334,7 +1333,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 8, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}, ipv6Payload3Addr1ToAddr2[64:], }, @@ -1356,7 +1355,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload3Addr1ToAddr2[:63], }, @@ -1372,7 +1371,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 8, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}, ipv6Payload3Addr1ToAddr2[63:], }, @@ -1394,7 +1393,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1410,7 +1409,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 8, More = false, ID = 2 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 2}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 2}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1432,7 +1431,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload4Addr1ToAddr2[:udpMaximumSizeMinus15], }, @@ -1448,10 +1447,10 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = udpMaximumSizeMinus15/8, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, + []byte{uint8(header.UDPProtocolNumber), 0, udpMaximumSizeMinus15 >> 8, udpMaximumSizeMinus15 & 0xff, - 0, 0, 0, 1}), + 0, 0, 0, 1}, ipv6Payload4Addr1ToAddr2[udpMaximumSizeMinus15:], }, @@ -1473,7 +1472,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload4Addr1ToAddr2[:udpMaximumSizeMinus15], }, @@ -1489,10 +1488,10 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = udpMaximumSizeMinus15/8, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, + []byte{uint8(header.UDPProtocolNumber), 0, udpMaximumSizeMinus15 >> 8, (udpMaximumSizeMinus15 & 0xff) + 1, - 0, 0, 0, 1}), + 0, 0, 0, 1}, ipv6Payload4Addr1ToAddr2[udpMaximumSizeMinus15:], }, @@ -1514,12 +1513,12 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Routing extension header. // // Segments left = 0. - buffer.View([]byte{fragmentExtHdrID, 0, 1, 0, 2, 3, 4, 5}), + []byte{fragmentExtHdrID, 0, 1, 0, 2, 3, 4, 5}, // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1535,12 +1534,12 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Routing extension header. // // Segments left = 0. - buffer.View([]byte{fragmentExtHdrID, 0, 1, 0, 2, 3, 4, 5}), + []byte{fragmentExtHdrID, 0, 1, 0, 2, 3, 4, 5}, // Fragment extension header. // // Fragment offset = 8, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1562,12 +1561,12 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Routing extension header. // // Segments left = 1. - buffer.View([]byte{fragmentExtHdrID, 0, 1, 1, 2, 3, 4, 5}), + []byte{fragmentExtHdrID, 0, 1, 1, 2, 3, 4, 5}, // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1583,12 +1582,12 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Routing extension header. // // Segments left = 1. - buffer.View([]byte{fragmentExtHdrID, 0, 1, 1, 2, 3, 4, 5}), + []byte{fragmentExtHdrID, 0, 1, 1, 2, 3, 4, 5}, // Fragment extension header. // // Fragment offset = 9, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 72, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 72, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1610,12 +1609,12 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{routingExtHdrID, 0, 0, 1, 0, 0, 0, 1}), + []byte{routingExtHdrID, 0, 0, 1, 0, 0, 0, 1}, // Routing extension header. // // Segments left = 0. - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 1, 0, 2, 3, 4, 5}), + []byte{uint8(header.UDPProtocolNumber), 0, 1, 0, 2, 3, 4, 5}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1631,7 +1630,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 9, More = false, ID = 1 - buffer.View([]byte{routingExtHdrID, 0, 0, 72, 0, 0, 0, 1}), + []byte{routingExtHdrID, 0, 0, 72, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1653,12 +1652,12 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{routingExtHdrID, 0, 0, 1, 0, 0, 0, 1}), + []byte{routingExtHdrID, 0, 0, 1, 0, 0, 0, 1}, // Routing extension header. // // Segments left = 1. - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 1, 1, 2, 3, 4, 5}), + []byte{uint8(header.UDPProtocolNumber), 0, 1, 1, 2, 3, 4, 5}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1674,7 +1673,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 9, More = false, ID = 1 - buffer.View([]byte{routingExtHdrID, 0, 0, 72, 0, 0, 0, 1}), + []byte{routingExtHdrID, 0, 0, 72, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1699,12 +1698,12 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{routingExtHdrID, 0, 0, 1, 0, 0, 0, 1}), + []byte{routingExtHdrID, 0, 0, 1, 0, 0, 0, 1}, // Routing extension header (part 1) // // Segments left = 0. - buffer.View([]byte{uint8(header.UDPProtocolNumber), 1, 1, 0, 2, 3, 4, 5}), + []byte{uint8(header.UDPProtocolNumber), 1, 1, 0, 2, 3, 4, 5}, }, ), }, @@ -1721,10 +1720,10 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 1, More = false, ID = 1 - buffer.View([]byte{routingExtHdrID, 0, 0, 8, 0, 0, 0, 1}), + []byte{routingExtHdrID, 0, 0, 8, 0, 0, 0, 1}, // Routing extension header (part 2) - buffer.View([]byte{6, 7, 8, 9, 10, 11, 12, 13}), + []byte{6, 7, 8, 9, 10, 11, 12, 13}, ipv6Payload1Addr1ToAddr2, }, @@ -1749,12 +1748,12 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{routingExtHdrID, 0, 0, 1, 0, 0, 0, 1}), + []byte{routingExtHdrID, 0, 0, 1, 0, 0, 0, 1}, // Routing extension header (part 1) // // Segments left = 1. - buffer.View([]byte{uint8(header.UDPProtocolNumber), 1, 1, 1, 2, 3, 4, 5}), + []byte{uint8(header.UDPProtocolNumber), 1, 1, 1, 2, 3, 4, 5}, }, ), }, @@ -1771,10 +1770,10 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 1, More = false, ID = 1 - buffer.View([]byte{routingExtHdrID, 0, 0, 8, 0, 0, 0, 1}), + []byte{routingExtHdrID, 0, 0, 8, 0, 0, 0, 1}, // Routing extension header (part 2) - buffer.View([]byte{6, 7, 8, 9, 10, 11, 12, 13}), + []byte{6, 7, 8, 9, 10, 11, 12, 13}, ipv6Payload1Addr1ToAddr2, }, @@ -1798,7 +1797,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1816,7 +1815,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 0, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 0, 0, 0, 0, 1}, ipv6Payload2Addr1ToAddr2, }, @@ -1832,7 +1831,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 8, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1854,7 +1853,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1870,7 +1869,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 2 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 2}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 2}, ipv6Payload2Addr1ToAddr2[:32], }, @@ -1886,7 +1885,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 8, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1902,7 +1901,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 4, More = false, ID = 2 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 32, 0, 0, 0, 2}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 32, 0, 0, 0, 2}, ipv6Payload2Addr1ToAddr2[32:], }, @@ -1924,7 +1923,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[:64], }, @@ -1940,7 +1939,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 0, More = true, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 1, 0, 0, 0, 1}, ipv6Payload1Addr3ToAddr2[:32], }, @@ -1956,7 +1955,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 8, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 64, 0, 0, 0, 1}, ipv6Payload1Addr1ToAddr2[64:], }, @@ -1972,7 +1971,7 @@ func TestReceiveIPv6Fragments(t *testing.T) { // Fragment extension header. // // Fragment offset = 4, More = false, ID = 1 - buffer.View([]byte{uint8(header.UDPProtocolNumber), 0, 0, 32, 0, 0, 0, 1}), + []byte{uint8(header.UDPProtocolNumber), 0, 0, 32, 0, 0, 0, 1}, ipv6Payload1Addr3ToAddr2[32:], }, @@ -2208,7 +2207,7 @@ func TestInvalidIPv6Fragments(t *testing.T) { checker.ICMPv6Type(test.expectICMPType), checker.ICMPv6Code(test.expectICMPCode), checker.ICMPv6TypeSpecific(test.expectICMPTypeSpecific), - checker.ICMPv6Payload([]byte(expectICMPPayload)), + checker.ICMPv6Payload(expectICMPPayload), ), ) }) @@ -2459,7 +2458,7 @@ func TestFragmentReassemblyTimeout(t *testing.T) { checker.ICMPv6( checker.ICMPv6Type(header.ICMPv6TimeExceeded), checker.ICMPv6Code(header.ICMPv6ReassemblyTimeout), - checker.ICMPv6Payload([]byte(firstFragmentSent)), + checker.ICMPv6Payload(firstFragmentSent), ), ) }) @@ -2795,11 +2794,7 @@ var fragmentationTests = []struct { } func TestFragmentationWritePacket(t *testing.T) { - const ( - ttl = 42 - tos = stack.DefaultTOS - transportProto = tcp.ProtocolNumber - ) + const ttl = 42 for _, ft := range fragmentationTests { t.Run(ft.description, func(t *testing.T) { @@ -3004,17 +2999,17 @@ func TestFragmentationErrors(t *testing.T) { func TestForwarding(t *testing.T) { const ( - nicID1 = 1 - nicID2 = 2 + incomingNICID = 1 + outgoingNICID = 2 randomSequence = 123 randomIdent = 42 ) - ipv6Addr1 := tcpip.AddressWithPrefix{ + incomingIPv6Addr := tcpip.AddressWithPrefix{ Address: tcpip.Address(net.ParseIP("10::1").To16()), PrefixLen: 64, } - ipv6Addr2 := tcpip.AddressWithPrefix{ + outgoingIPv6Addr := tcpip.AddressWithPrefix{ Address: tcpip.Address(net.ParseIP("11::1").To16()), PrefixLen: 64, } @@ -3022,6 +3017,7 @@ func TestForwarding(t *testing.T) { Address: tcpip.Address(net.ParseIP("ff00::").To16()), PrefixLen: 64, } + remoteIPv6Addr1 := tcpip.Address(net.ParseIP("10::2").To16()) remoteIPv6Addr2 := tcpip.Address(net.ParseIP("11::2").To16()) unreachableIPv6Addr := tcpip.Address(net.ParseIP("12::2").To16()) @@ -3296,36 +3292,36 @@ func TestForwarding(t *testing.T) { TransportProtocols: []stack.TransportProtocolFactory{icmp.NewProtocol6}, }) // We expect at most a single packet in response to our ICMP Echo Request. - e1 := channel.New(1, header.IPv6MinimumMTU, "") - if err := s.CreateNIC(nicID1, e1); err != nil { - t.Fatalf("CreateNIC(%d, _): %s", nicID1, err) + incomingEndpoint := channel.New(1, header.IPv6MinimumMTU, "") + if err := s.CreateNIC(incomingNICID, incomingEndpoint); err != nil { + t.Fatalf("CreateNIC(%d, _): %s", incomingNICID, err) } - ipv6ProtoAddr1 := tcpip.ProtocolAddress{Protocol: ProtocolNumber, AddressWithPrefix: ipv6Addr1} - if err := s.AddProtocolAddress(nicID1, ipv6ProtoAddr1); err != nil { - t.Fatalf("AddProtocolAddress(%d, %#v): %s", nicID1, ipv6ProtoAddr1, err) + incomingIPv6ProtoAddr := tcpip.ProtocolAddress{Protocol: ProtocolNumber, AddressWithPrefix: incomingIPv6Addr} + if err := s.AddProtocolAddress(incomingNICID, incomingIPv6ProtoAddr); err != nil { + t.Fatalf("AddProtocolAddress(%d, %#v): %s", incomingNICID, incomingIPv6ProtoAddr, err) } - e2 := channel.New(1, header.IPv6MinimumMTU, "") - if err := s.CreateNIC(nicID2, e2); err != nil { - t.Fatalf("CreateNIC(%d, _): %s", nicID2, err) + outgoingEndpoint := channel.New(1, header.IPv6MinimumMTU, "") + if err := s.CreateNIC(outgoingNICID, outgoingEndpoint); err != nil { + t.Fatalf("CreateNIC(%d, _): %s", outgoingNICID, err) } - ipv6ProtoAddr2 := tcpip.ProtocolAddress{Protocol: ProtocolNumber, AddressWithPrefix: ipv6Addr2} - if err := s.AddProtocolAddress(nicID2, ipv6ProtoAddr2); err != nil { - t.Fatalf("AddProtocolAddress(%d, %#v): %s", nicID2, ipv6ProtoAddr2, err) + outgoingIPv6ProtoAddr := tcpip.ProtocolAddress{Protocol: ProtocolNumber, AddressWithPrefix: outgoingIPv6Addr} + if err := s.AddProtocolAddress(outgoingNICID, outgoingIPv6ProtoAddr); err != nil { + t.Fatalf("AddProtocolAddress(%d, %#v): %s", outgoingNICID, outgoingIPv6ProtoAddr, err) } s.SetRouteTable([]tcpip.Route{ { - Destination: ipv6Addr1.Subnet(), - NIC: nicID1, + Destination: incomingIPv6Addr.Subnet(), + NIC: incomingNICID, }, { - Destination: ipv6Addr2.Subnet(), - NIC: nicID2, + Destination: outgoingIPv6Addr.Subnet(), + NIC: outgoingNICID, }, { Destination: multicastIPv6Addr.Subnet(), - NIC: nicID2, + NIC: outgoingNICID, }, }) @@ -3334,7 +3330,7 @@ func TestForwarding(t *testing.T) { } transportProtocol := header.ICMPv6ProtocolNumber - extHdrBytes := []byte{} + var extHdrBytes []byte extHdrChecker := checker.IPv6ExtHdr() if test.extHdr != nil { nextHdrID := hopByHopExtHdrID @@ -3348,15 +3344,15 @@ func TestForwarding(t *testing.T) { totalLength := ipHeaderLength + icmpHeaderLength + test.payloadLength + extHdrLen hdr := buffer.NewPrependable(totalLength) hdr.Prepend(test.payloadLength) - icmp := header.ICMPv6(hdr.Prepend(icmpHeaderLength)) - - icmp.SetIdent(randomIdent) - icmp.SetSequence(randomSequence) - icmp.SetType(header.ICMPv6EchoRequest) - icmp.SetCode(header.ICMPv6UnusedCode) - icmp.SetChecksum(0) - icmp.SetChecksum(header.ICMPv6Checksum(header.ICMPv6ChecksumParams{ - Header: icmp, + icmpH := header.ICMPv6(hdr.Prepend(icmpHeaderLength)) + + icmpH.SetIdent(randomIdent) + icmpH.SetSequence(randomSequence) + icmpH.SetType(header.ICMPv6EchoRequest) + icmpH.SetCode(header.ICMPv6UnusedCode) + icmpH.SetChecksum(0) + icmpH.SetChecksum(header.ICMPv6Checksum(header.ICMPv6ChecksumParams{ + Header: icmpH, Src: test.sourceAddr, Dst: test.destAddr, })) @@ -3372,9 +3368,10 @@ func TestForwarding(t *testing.T) { requestPkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ Data: hdr.View().ToVectorisedView(), }) - e1.InjectInbound(ProtocolNumber, requestPkt) + incomingEndpoint.InjectInbound(ProtocolNumber, requestPkt) + + reply, ok := incomingEndpoint.Read() - reply, ok := e1.Read() if test.expectErrorICMP { if !ok { t.Fatalf("expected ICMP packet type %d through incoming NIC", test.icmpType) @@ -3393,31 +3390,31 @@ func TestForwarding(t *testing.T) { return len(hdr.View()) } - checker.IPv6(t, header.IPv6(stack.PayloadSince(reply.Pkt.NetworkHeader())), - checker.SrcAddr(ipv6Addr1.Address), + checker.IPv6(t, stack.PayloadSince(reply.Pkt.NetworkHeader()), + checker.SrcAddr(incomingIPv6Addr.Address), checker.DstAddr(test.sourceAddr), checker.TTL(DefaultTTL), checker.ICMPv6( checker.ICMPv6Type(test.icmpType), checker.ICMPv6Code(test.icmpCode), - checker.ICMPv6Payload([]byte(hdr.View()[0:expectedICMPPayloadLength()])), + checker.ICMPv6Payload(hdr.View()[:expectedICMPPayloadLength()]), ), ) - if n := e2.Drain(); n != 0 { + if n := outgoingEndpoint.Drain(); n != 0 { t.Fatalf("got e2.Drain() = %d, want = 0", n) } } else if ok { t.Fatalf("expected no ICMP packet through incoming NIC, instead found: %#v", reply) } - reply, ok = e2.Read() + reply, ok = outgoingEndpoint.Read() if test.expectPacketForwarded { if !ok { t.Fatal("expected ICMP Echo Request packet through outgoing NIC") } - checker.IPv6WithExtHdr(t, header.IPv6(stack.PayloadSince(reply.Pkt.NetworkHeader())), + checker.IPv6WithExtHdr(t, stack.PayloadSince(reply.Pkt.NetworkHeader()), checker.SrcAddr(test.sourceAddr), checker.DstAddr(test.destAddr), checker.TTL(test.TTL-1), @@ -3429,7 +3426,7 @@ func TestForwarding(t *testing.T) { ), ) - if n := e1.Drain(); n != 0 { + if n := incomingEndpoint.Drain(); n != 0 { t.Fatalf("got e1.Drain() = %d, want = 0", n) } } else if ok { diff --git a/pkg/tcpip/network/ipv6/mld_test.go b/pkg/tcpip/network/ipv6/mld_test.go index 71d1c3e28..bc9cf6999 100644 --- a/pkg/tcpip/network/ipv6/mld_test.go +++ b/pkg/tcpip/network/ipv6/mld_test.go @@ -16,6 +16,7 @@ package ipv6_test import ( "bytes" + "math/rand" "testing" "time" @@ -138,7 +139,8 @@ func TestSendQueuedMLDReports(t *testing.T) { var secureRNG bytes.Reader secureRNG.Reset(secureRNGBytes[:]) s := stack.New(stack.Options{ - SecureRNG: &secureRNG, + SecureRNG: &secureRNG, + RandSource: rand.NewSource(time.Now().UnixNano()), NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ DADConfigs: stack.DADConfigurations{ DupAddrDetectTransmits: test.dadTransmits, diff --git a/pkg/tcpip/network/ipv6/ndp.go b/pkg/tcpip/network/ipv6/ndp.go index b29fed347..ee36ed254 100644 --- a/pkg/tcpip/network/ipv6/ndp.go +++ b/pkg/tcpip/network/ipv6/ndp.go @@ -16,7 +16,6 @@ package ipv6 import ( "fmt" - "math/rand" "time" "gvisor.dev/gvisor/pkg/sync" @@ -215,28 +214,23 @@ type NDPDispatcher interface { // is also not permitted to call into the stack. OnDuplicateAddressDetectionResult(tcpip.NICID, tcpip.Address, stack.DADResult) - // OnDefaultRouterDiscovered is called when a new default router is - // discovered. Implementations must return true if the newly discovered - // router should be remembered. + // OnOffLinkRouteUpdated is called when an off-link route is updated. // // This function is not permitted to block indefinitely. This function // is also not permitted to call into the stack. - OnDefaultRouterDiscovered(tcpip.NICID, tcpip.Address) bool + OnOffLinkRouteUpdated(tcpip.NICID, tcpip.Subnet, tcpip.Address) - // OnDefaultRouterInvalidated is called when a discovered default router that - // was remembered is invalidated. + // OnOffLinkRouteInvalidated is called when an off-link route is invalidated. // // This function is not permitted to block indefinitely. This function // is also not permitted to call into the stack. - OnDefaultRouterInvalidated(tcpip.NICID, tcpip.Address) + OnOffLinkRouteInvalidated(tcpip.NICID, tcpip.Subnet, tcpip.Address) // OnOnLinkPrefixDiscovered is called when a new on-link prefix is discovered. - // Implementations must return true if the newly discovered on-link prefix - // should be remembered. // // This function is not permitted to block indefinitely. This function // is also not permitted to call into the stack. - OnOnLinkPrefixDiscovered(tcpip.NICID, tcpip.Subnet) bool + OnOnLinkPrefixDiscovered(tcpip.NICID, tcpip.Subnet) // OnOnLinkPrefixInvalidated is called when a discovered on-link prefix that // was remembered is invalidated. @@ -246,13 +240,11 @@ type NDPDispatcher interface { OnOnLinkPrefixInvalidated(tcpip.NICID, tcpip.Subnet) // OnAutoGenAddress is called when a new prefix with its autonomous address- - // configuration flag set is received and SLAAC was performed. Implementations - // may prevent the stack from assigning the address to the NIC by returning - // false. + // configuration flag set is received and SLAAC was performed. // // This function is not permitted to block indefinitely. It must not // call functions on the stack itself. - OnAutoGenAddress(tcpip.NICID, tcpip.AddressWithPrefix) bool + OnAutoGenAddress(tcpip.NICID, tcpip.AddressWithPrefix) // OnAutoGenAddressDeprecated is called when an auto-generated address (SLAAC) // is deprecated, but is still considered valid. Note, if an address is @@ -549,7 +541,7 @@ type tempSLAACAddrState struct { // Must not be nil. regenJob *tcpip.Job - createdAt time.Time + createdAt tcpip.MonotonicTime // The address's endpoint. // @@ -573,10 +565,10 @@ type slaacPrefixState struct { invalidationJob *tcpip.Job // Nonzero only when the address is not valid forever. - validUntil time.Time + validUntil tcpip.MonotonicTime // Nonzero only when the address is not preferred forever. - preferredUntil time.Time + preferredUntil tcpip.MonotonicTime // State associated with the stable address generated for the prefix. stableAddr struct { @@ -705,7 +697,7 @@ func (ndp *ndpState) handleRA(ip tcpip.Address, ra header.NDPRouterAdvert) { // per-interface basis; it is a protocol-wide configuration, so we check the // protocol's forwarding flag to determine if the IPv6 endpoint is forwarding // packets. - if !ndp.configs.HandleRAs.enabled(ndp.ep.protocol.Forwarding()) { + if !ndp.configs.HandleRAs.enabled(ndp.ep.Forwarding()) { ndp.ep.stats.localStats.UnhandledRouterAdvertisements.Increment() return } @@ -832,7 +824,7 @@ func (ndp *ndpState) invalidateDefaultRouter(ip tcpip.Address) { // Let the integrator know a discovered default router is invalidated. if ndpDisp := ndp.ep.protocol.options.NDPDisp; ndpDisp != nil { - ndpDisp.OnDefaultRouterInvalidated(ndp.ep.nic.ID(), ip) + ndpDisp.OnOffLinkRouteInvalidated(ndp.ep.nic.ID(), header.IPv6EmptySubnet, ip) } } @@ -849,11 +841,7 @@ func (ndp *ndpState) rememberDefaultRouter(ip tcpip.Address, rl time.Duration) { } // Inform the integrator when we discovered a default router. - if !ndpDisp.OnDefaultRouterDiscovered(ndp.ep.nic.ID(), ip) { - // Informed by the integrator to not remember the router, do - // nothing further. - return - } + ndpDisp.OnOffLinkRouteUpdated(ndp.ep.nic.ID(), header.IPv6EmptySubnet, ip) state := defaultRouterState{ invalidationJob: ndp.ep.protocol.stack.NewJob(&ndp.ep.mu, func() { @@ -879,11 +867,7 @@ func (ndp *ndpState) rememberOnLinkPrefix(prefix tcpip.Subnet, l time.Duration) } // Inform the integrator when we discovered an on-link prefix. - if !ndpDisp.OnOnLinkPrefixDiscovered(ndp.ep.nic.ID(), prefix) { - // Informed by the integrator to not remember the prefix, do - // nothing further. - return - } + ndpDisp.OnOnLinkPrefixDiscovered(ndp.ep.nic.ID(), prefix) state := onLinkPrefixState{ invalidationJob: ndp.ep.protocol.stack.NewJob(&ndp.ep.mu, func() { @@ -1051,7 +1035,7 @@ func (ndp *ndpState) doSLAAC(prefix tcpip.Subnet, pl, vl time.Duration) { maxGenerationAttempts: ndp.configs.AutoGenAddressConflictRetries + 1, } - now := time.Now() + now := ndp.ep.protocol.stack.Clock().NowMonotonic() // The time an address is preferred until is needed to properly generate the // address. @@ -1097,16 +1081,13 @@ func (ndp *ndpState) addAndAcquireSLAACAddr(addr tcpip.AddressWithPrefix, config return nil } - if !ndpDisp.OnAutoGenAddress(ndp.ep.nic.ID(), addr) { - // Informed by the integrator not to add the address. - return nil - } - addressEndpoint, err := ndp.ep.addAndAcquirePermanentAddressLocked(addr, stack.FirstPrimaryEndpoint, configType, deprecated) if err != nil { panic(fmt.Sprintf("ndp: error when adding SLAAC address %+v: %s", addr, err)) } + ndpDisp.OnAutoGenAddress(ndp.ep.nic.ID(), addr) + return addressEndpoint } @@ -1182,7 +1163,7 @@ func (ndp *ndpState) generateSLAACAddr(prefix tcpip.Subnet, state *slaacPrefixSt state.stableAddr.localGenerationFailures++ } - if addressEndpoint := ndp.addAndAcquireSLAACAddr(generatedAddr, stack.AddressConfigSlaac, time.Since(state.preferredUntil) >= 0 /* deprecated */); addressEndpoint != nil { + if addressEndpoint := ndp.addAndAcquireSLAACAddr(generatedAddr, stack.AddressConfigSlaac, ndp.ep.protocol.stack.Clock().NowMonotonic().Sub(state.preferredUntil) >= 0 /* deprecated */); addressEndpoint != nil { state.stableAddr.addressEndpoint = addressEndpoint state.generationAttempts++ return true @@ -1237,13 +1218,13 @@ func (ndp *ndpState) generateTempSLAACAddr(prefix tcpip.Subnet, prefixState *sla } stableAddr := prefixState.stableAddr.addressEndpoint.AddressWithPrefix().Address - now := time.Now() + now := ndp.ep.protocol.stack.Clock().NowMonotonic() // As per RFC 4941 section 3.3 step 4, the valid lifetime of a temporary // address is the lower of the valid lifetime of the stable address or the // maximum temporary address valid lifetime. vl := ndp.configs.MaxTempAddrValidLifetime - if prefixState.validUntil != (time.Time{}) { + if prefixState.validUntil != (tcpip.MonotonicTime{}) { if prefixVL := prefixState.validUntil.Sub(now); vl > prefixVL { vl = prefixVL } @@ -1259,7 +1240,7 @@ func (ndp *ndpState) generateTempSLAACAddr(prefix tcpip.Subnet, prefixState *sla // maximum temporary address preferred lifetime - the temporary address desync // factor. pl := ndp.configs.MaxTempAddrPreferredLifetime - ndp.temporaryAddressDesyncFactor - if prefixState.preferredUntil != (time.Time{}) { + if prefixState.preferredUntil != (tcpip.MonotonicTime{}) { if prefixPL := prefixState.preferredUntil.Sub(now); pl > prefixPL { // Respect the preferred lifetime of the prefix, as per RFC 4941 section // 3.3 step 4. @@ -1394,7 +1375,7 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat // deprecation job so it can be reset. prefixState.deprecationJob.Cancel() - now := time.Now() + now := ndp.ep.protocol.stack.Clock().NowMonotonic() // Schedule the deprecation job if prefix has a finite preferred lifetime. if pl < header.NDPInfiniteLifetime { @@ -1403,7 +1384,7 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat } prefixState.preferredUntil = now.Add(pl) } else { - prefixState.preferredUntil = time.Time{} + prefixState.preferredUntil = tcpip.MonotonicTime{} } // As per RFC 4862 section 5.5.3.e, update the valid lifetime for prefix: @@ -1421,17 +1402,17 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat // Handle the infinite valid lifetime separately as we do not schedule a // job in this case. prefixState.invalidationJob.Cancel() - prefixState.validUntil = time.Time{} + prefixState.validUntil = tcpip.MonotonicTime{} } else { var effectiveVl time.Duration var rl time.Duration // If the prefix was originally set to be valid forever, assume the // remaining time to be the maximum possible value. - if prefixState.validUntil == (time.Time{}) { + if prefixState.validUntil == (tcpip.MonotonicTime{}) { rl = header.NDPInfiniteLifetime } else { - rl = time.Until(prefixState.validUntil) + rl = prefixState.validUntil.Sub(now) } if vl > MinPrefixInformationValidLifetimeForUpdate || vl > rl { @@ -1463,7 +1444,7 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat // maximum temporary address valid lifetime. Note, the valid lifetime of a // temporary address is relative to the address's creation time. validUntil := tempAddrState.createdAt.Add(ndp.configs.MaxTempAddrValidLifetime) - if prefixState.validUntil != (time.Time{}) && validUntil.Sub(prefixState.validUntil) > 0 { + if prefixState.validUntil != (tcpip.MonotonicTime{}) && validUntil.Sub(prefixState.validUntil) > 0 { validUntil = prefixState.validUntil } @@ -1483,7 +1464,7 @@ func (ndp *ndpState) refreshSLAACPrefixLifetimes(prefix tcpip.Subnet, prefixStat // desync factor. Note, the preferred lifetime of a temporary address is // relative to the address's creation time. preferredUntil := tempAddrState.createdAt.Add(ndp.configs.MaxTempAddrPreferredLifetime - ndp.temporaryAddressDesyncFactor) - if prefixState.preferredUntil != (time.Time{}) && preferredUntil.Sub(prefixState.preferredUntil) > 0 { + if prefixState.preferredUntil != (tcpip.MonotonicTime{}) && preferredUntil.Sub(prefixState.preferredUntil) > 0 { preferredUntil = prefixState.preferredUntil } @@ -1710,7 +1691,7 @@ func (ndp *ndpState) startSolicitingRouters() { return } - if !ndp.configs.HandleRAs.enabled(ndp.ep.protocol.Forwarding()) { + if !ndp.configs.HandleRAs.enabled(ndp.ep.Forwarding()) { return } @@ -1718,7 +1699,7 @@ func (ndp *ndpState) startSolicitingRouters() { // 4861 section 6.3.7. var delay time.Duration if ndp.configs.MaxRtrSolicitationDelay > 0 { - delay = time.Duration(rand.Int63n(int64(ndp.configs.MaxRtrSolicitationDelay))) + delay = time.Duration(ndp.ep.protocol.stack.Rand().Int63n(int64(ndp.configs.MaxRtrSolicitationDelay))) } // Protected by ndp.ep.mu. @@ -1754,7 +1735,7 @@ func (ndp *ndpState) startSolicitingRouters() { header.NDPSourceLinkLayerAddressOption(linkAddress), } } - payloadSize := header.ICMPv6HeaderSize + header.NDPRSMinimumSize + int(optsSerializer.Length()) + payloadSize := header.ICMPv6HeaderSize + header.NDPRSMinimumSize + optsSerializer.Length() icmpData := header.ICMPv6(buffer.NewView(payloadSize)) icmpData.SetType(header.ICMPv6RouterSolicit) rs := header.NDPRouterSolicit(icmpData.MessageBody()) @@ -1861,7 +1842,7 @@ func (ndp *ndpState) init(ep *endpoint, dadOptions ip.DADOptions) { header.InitialTempIID(ndp.temporaryIIDHistory[:], ndp.ep.protocol.options.TempIIDSeed, ndp.ep.nic.ID()) if MaxDesyncFactor != 0 { - ndp.temporaryAddressDesyncFactor = time.Duration(rand.Int63n(int64(MaxDesyncFactor))) + ndp.temporaryAddressDesyncFactor = time.Duration(ep.protocol.stack.Rand().Int63n(int64(MaxDesyncFactor))) } } diff --git a/pkg/tcpip/network/ipv6/ndp_test.go b/pkg/tcpip/network/ipv6/ndp_test.go index 570c6c00c..95d23f200 100644 --- a/pkg/tcpip/network/ipv6/ndp_test.go +++ b/pkg/tcpip/network/ipv6/ndp_test.go @@ -16,7 +16,7 @@ package ipv6 import ( "bytes" - "context" + "math/rand" "strings" "testing" "time" @@ -32,58 +32,6 @@ import ( "gvisor.dev/gvisor/pkg/tcpip/transport/icmp" ) -// setupStackAndEndpoint creates a stack with a single NIC with a link-local -// address llladdr and an IPv6 endpoint to a remote with link-local address -// rlladdr -func setupStackAndEndpoint(t *testing.T, llladdr, rlladdr tcpip.Address) (*stack.Stack, stack.NetworkEndpoint) { - t.Helper() - - s := stack.New(stack.Options{ - NetworkProtocols: []stack.NetworkProtocolFactory{NewProtocol}, - TransportProtocols: []stack.TransportProtocolFactory{icmp.NewProtocol6}, - }) - - if err := s.CreateNIC(1, &stubLinkEndpoint{}); err != nil { - t.Fatalf("CreateNIC(_) = %s", err) - } - { - subnet, err := tcpip.NewSubnet(rlladdr, tcpip.AddressMask(strings.Repeat("\xff", len(rlladdr)))) - if err != nil { - t.Fatal(err) - } - s.SetRouteTable( - []tcpip.Route{{ - Destination: subnet, - NIC: 1, - }}, - ) - } - - netProto := s.NetworkProtocolInstance(ProtocolNumber) - if netProto == nil { - t.Fatalf("cannot find protocol instance for network protocol %d", ProtocolNumber) - } - - ep := netProto.NewEndpoint(&testInterface{}, &stubDispatcher{}) - if err := ep.Enable(); err != nil { - t.Fatalf("ep.Enable(): %s", err) - } - t.Cleanup(ep.Close) - - addressableEndpoint, ok := ep.(stack.AddressableEndpoint) - if !ok { - t.Fatalf("expected network endpoint to implement stack.AddressableEndpoint") - } - addr := llladdr.WithPrefix() - if addressEP, err := addressableEndpoint.AddAndAcquirePermanentAddress(addr, stack.CanBePrimaryEndpoint, stack.AddressConfigStatic, false /* deprecated */); err != nil { - t.Fatalf("addressableEndpoint.AddAndAcquirePermanentAddress(%s, CanBePrimaryEndpoint, AddressConfigStatic, false): %s", addr, err) - } else { - addressEP.DecRef() - } - - return s, ep -} - var _ NDPDispatcher = (*testNDPDispatcher)(nil) // testNDPDispatcher is an NDPDispatcher only allows default router discovery. @@ -94,24 +42,21 @@ type testNDPDispatcher struct { func (*testNDPDispatcher) OnDuplicateAddressDetectionResult(tcpip.NICID, tcpip.Address, stack.DADResult) { } -func (t *testNDPDispatcher) OnDefaultRouterDiscovered(_ tcpip.NICID, addr tcpip.Address) bool { +func (t *testNDPDispatcher) OnOffLinkRouteUpdated(_ tcpip.NICID, _ tcpip.Subnet, addr tcpip.Address) { t.addr = addr - return true } -func (t *testNDPDispatcher) OnDefaultRouterInvalidated(_ tcpip.NICID, addr tcpip.Address) { +func (t *testNDPDispatcher) OnOffLinkRouteInvalidated(_ tcpip.NICID, _ tcpip.Subnet, addr tcpip.Address) { t.addr = addr } -func (*testNDPDispatcher) OnOnLinkPrefixDiscovered(tcpip.NICID, tcpip.Subnet) bool { - return false +func (*testNDPDispatcher) OnOnLinkPrefixDiscovered(tcpip.NICID, tcpip.Subnet) { } func (*testNDPDispatcher) OnOnLinkPrefixInvalidated(tcpip.NICID, tcpip.Subnet) { } -func (*testNDPDispatcher) OnAutoGenAddress(tcpip.NICID, tcpip.AddressWithPrefix) bool { - return false +func (*testNDPDispatcher) OnAutoGenAddress(tcpip.NICID, tcpip.AddressWithPrefix) { } func (*testNDPDispatcher) OnAutoGenAddressDeprecated(tcpip.NICID, tcpip.AddressWithPrefix) { @@ -163,11 +108,6 @@ func TestStackNDPEndpointInvalidateDefaultRouter(t *testing.T) { } } -type linkResolutionResult struct { - linkAddr tcpip.LinkAddress - ok bool -} - // TestNeighborSolicitationWithSourceLinkLayerOption tests that receiving a // valid NDP NS message with the Source Link Layer Address option results in a // new entry in the link address cache for the sender of the message. @@ -456,8 +396,10 @@ func TestNeighborSolicitationResponse(t *testing.T) { for _, test := range tests { t.Run(test.name, func(t *testing.T) { + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{NewProtocol}, + Clock: clock, }) e := channel.New(1, 1280, nicLinkAddr) e.LinkEPCapabilities |= stack.CapabilityResolutionRequired @@ -527,7 +469,8 @@ func TestNeighborSolicitationResponse(t *testing.T) { } if test.performsLinkResolution { - p, got := e.ReadContext(context.Background()) + clock.RunImmediatelyScheduledJobs() + p, got := e.Read() if !got { t.Fatal("expected an NDP NS response") } @@ -582,7 +525,8 @@ func TestNeighborSolicitationResponse(t *testing.T) { })) } - p, got := e.ReadContext(context.Background()) + clock.RunImmediatelyScheduledJobs() + p, got := e.Read() if !got { t.Fatal("expected an NDP NA response") } @@ -732,15 +676,7 @@ func TestNeighborAdvertisementWithTargetLinkLayerOption(t *testing.T) { } func TestNDPValidation(t *testing.T) { - setup := func(t *testing.T) (*stack.Stack, stack.NetworkEndpoint) { - t.Helper() - - // Create a stack with the assigned link-local address lladdr0 - // and an endpoint to lladdr1. - s, ep := setupStackAndEndpoint(t, lladdr0, lladdr1) - - return s, ep - } + const nicID = 1 handleIPv6Payload := func(payload buffer.View, hopLimit uint8, atomicFragment bool, ep stack.NetworkEndpoint) { var extHdrs header.IPv6ExtHdrSerializer @@ -865,6 +801,11 @@ func TestNDPValidation(t *testing.T) { }, } + subnet, err := tcpip.NewSubnet(lladdr1, tcpip.AddressMask(strings.Repeat("\xff", len(lladdr0)))) + if err != nil { + t.Fatal(err) + } + for _, typ := range types { for _, isRouter := range []bool{false, true} { name := typ.name @@ -875,7 +816,10 @@ func TestNDPValidation(t *testing.T) { t.Run(name, func(t *testing.T) { for _, test := range subTests { t.Run(test.name, func(t *testing.T) { - s, ep := setup(t) + s := stack.New(stack.Options{ + NetworkProtocols: []stack.NetworkProtocolFactory{NewProtocol}, + TransportProtocols: []stack.TransportProtocolFactory{icmp.NewProtocol6}, + }) if isRouter { if err := s.SetForwardingDefaultAndAllNICs(ProtocolNumber, true); err != nil { @@ -883,17 +827,35 @@ func TestNDPValidation(t *testing.T) { } } + if err := s.CreateNIC(nicID, &stubLinkEndpoint{}); err != nil { + t.Fatalf("CreateNIC(%d, _): %s", nicID, err) + } + + if err := s.AddAddress(nicID, ProtocolNumber, lladdr0); err != nil { + t.Fatalf("AddAddress(%d, %d, %s): %s", nicID, ProtocolNumber, lladdr0, err) + } + + ep, err := s.GetNetworkEndpoint(nicID, ProtocolNumber) + if err != nil { + t.Fatal("cannot find network endpoint instance for IPv6") + } + + s.SetRouteTable([]tcpip.Route{{ + Destination: subnet, + NIC: nicID, + }}) + stats := s.Stats().ICMP.V6.PacketsReceived invalid := stats.Invalid routerOnly := stats.RouterOnlyPacketsDroppedByHost typStat := typ.statCounter(stats) - icmp := header.ICMPv6(buffer.NewView(typ.size + len(typ.extraData))) - copy(icmp[typ.size:], typ.extraData) - icmp.SetType(typ.typ) - icmp.SetCode(test.code) - icmp.SetChecksum(header.ICMPv6Checksum(header.ICMPv6ChecksumParams{ - Header: icmp[:typ.size], + icmpH := header.ICMPv6(buffer.NewView(typ.size + len(typ.extraData))) + copy(icmpH[typ.size:], typ.extraData) + icmpH.SetType(typ.typ) + icmpH.SetCode(test.code) + icmpH.SetChecksum(header.ICMPv6Checksum(header.ICMPv6ChecksumParams{ + Header: icmpH[:typ.size], Src: lladdr0, Dst: lladdr1, PayloadCsum: header.Checksum(typ.extraData /* initial */, 0), @@ -907,19 +869,19 @@ func TestNDPValidation(t *testing.T) { // Invalid count should initially be 0. if got := invalid.Value(); got != 0 { - t.Errorf("got invalid = %d, want = 0", got) + t.Errorf("got invalid.Value() = %d, want = 0", got) } - // RouterOnlyPacketsReceivedByHost count should initially be 0. + // Should initially not have dropped any packets. if got := routerOnly.Value(); got != 0 { - t.Errorf("got RouterOnlyPacketsReceivedByHost = %d, want = 0", got) + t.Errorf("got routerOnly.Value() = %d, want = 0", got) } if t.Failed() { t.FailNow() } - handleIPv6Payload(buffer.View(icmp), test.hopLimit, test.atomicFragment, ep) + handleIPv6Payload(buffer.View(icmpH), test.hopLimit, test.atomicFragment, ep) // Rx count of the NDP packet should have increased. if got := typStat.Value(); got != 1 { @@ -932,18 +894,18 @@ func TestNDPValidation(t *testing.T) { want = 1 } if got := invalid.Value(); got != want { - t.Errorf("got invalid = %d, want = %d", got, want) + t.Errorf("got invalid.Value() = %d, want = %d", got, want) } want = 0 if test.valid && !isRouter && typ.routerOnly { - // RouterOnlyPacketsReceivedByHost count should have increased. + // Router only packets are expected to be dropped when operating + // as a host. want = 1 } if got := routerOnly.Value(); got != want { - t.Errorf("got RouterOnlyPacketsReceivedByHost = %d, want = %d", got, want) + t.Errorf("got routerOnly.Value() = %d, want = %d", got, want) } - }) } }) @@ -1279,8 +1241,9 @@ func TestCheckDuplicateAddress(t *testing.T) { var secureRNG bytes.Reader secureRNG.Reset(secureRNGBytes[:]) s := stack.New(stack.Options{ - SecureRNG: &secureRNG, - Clock: clock, + Clock: clock, + RandSource: rand.NewSource(time.Now().UnixNano()), + SecureRNG: &secureRNG, NetworkProtocols: []stack.NetworkProtocolFactory{NewProtocolWithOptions(Options{ DADConfigs: dadConfigs, })}, @@ -1297,7 +1260,8 @@ func TestCheckDuplicateAddress(t *testing.T) { snmc := header.SolicitedNodeAddr(lladdr0) remoteLinkAddr := header.EthernetAddressFromMulticastIPv6Address(snmc) checkDADMsg := func() { - p, ok := e.ReadContext(context.Background()) + clock.RunImmediatelyScheduledJobs() + p, ok := e.Read() if !ok { t.Fatalf("expected %d-th DAD message", dadPacketsSent) } @@ -1345,7 +1309,7 @@ func TestCheckDuplicateAddress(t *testing.T) { t.Fatalf("RemoveAddress(%d, %s): %s", nicID, lladdr0, err) } // Should not restart DAD since we already requested DAD above - the handler - // should be called when the original request compeletes so we should not send + // should be called when the original request completes so we should not send // an extra DAD message here. dadRequestsMade++ if res, err := s.CheckDuplicateAddress(nicID, ProtocolNumber, lladdr0, func(r stack.DADResult) { diff --git a/pkg/tcpip/ports/ports.go b/pkg/tcpip/ports/ports.go index b5b013b64..854d6a6ba 100644 --- a/pkg/tcpip/ports/ports.go +++ b/pkg/tcpip/ports/ports.go @@ -101,7 +101,7 @@ func (dc destToCounter) intersectionFlags(res Reservation) (BitFlags, int) { // Wildcard destinations affect all destinations for TupleOnly. if dest.addr == anyIPAddress || res.Dest.Addr == anyIPAddress { // Only bitwise and the TupleOnlyFlag. - intersection &= ((^TupleOnlyFlag) | counter.SharedFlags()) + intersection &= (^TupleOnlyFlag) | counter.SharedFlags() count++ } } @@ -238,13 +238,13 @@ type PortTester func(port uint16) (good bool, err tcpip.Error) // possible ephemeral ports, allowing the caller to decide whether a given port // is suitable for its needs, and stopping when a port is found or an error // occurs. -func (pm *PortManager) PickEphemeralPort(testPort PortTester) (port uint16, err tcpip.Error) { +func (pm *PortManager) PickEphemeralPort(rng *rand.Rand, testPort PortTester) (port uint16, err tcpip.Error) { pm.ephemeralMu.RLock() firstEphemeral := pm.firstEphemeral numEphemeral := pm.numEphemeral pm.ephemeralMu.RUnlock() - offset := uint32(rand.Int31n(int32(numEphemeral))) + offset := uint32(rng.Int31n(int32(numEphemeral))) return pickEphemeralPort(offset, firstEphemeral, numEphemeral, testPort) } @@ -303,7 +303,7 @@ func pickEphemeralPort(offset uint32, first, count uint16, testPort PortTester) // An optional PortTester can be passed in which if provided will be used to // test if the picked port can be used. The function should return true if the // port is safe to use, false otherwise. -func (pm *PortManager) ReservePort(res Reservation, testPort PortTester) (reservedPort uint16, err tcpip.Error) { +func (pm *PortManager) ReservePort(rng *rand.Rand, res Reservation, testPort PortTester) (reservedPort uint16, err tcpip.Error) { pm.mu.Lock() defer pm.mu.Unlock() @@ -328,7 +328,7 @@ func (pm *PortManager) ReservePort(res Reservation, testPort PortTester) (reserv } // A port wasn't specified, so try to find one. - return pm.PickEphemeralPort(func(p uint16) (bool, tcpip.Error) { + return pm.PickEphemeralPort(rng, func(p uint16) (bool, tcpip.Error) { res.Port = p if !pm.reserveSpecificPortLocked(res) { return false, nil diff --git a/pkg/tcpip/ports/ports_test.go b/pkg/tcpip/ports/ports_test.go index 6c4fb8c68..a91b130df 100644 --- a/pkg/tcpip/ports/ports_test.go +++ b/pkg/tcpip/ports/ports_test.go @@ -18,6 +18,7 @@ import ( "math" "math/rand" "testing" + "time" "github.com/google/go-cmp/cmp" "gvisor.dev/gvisor/pkg/tcpip" @@ -331,6 +332,7 @@ func TestPortReservation(t *testing.T) { t.Run(test.tname, func(t *testing.T) { pm := NewPortManager() net := []tcpip.NetworkProtocolNumber{fakeNetworkNumber} + rng := rand.New(rand.NewSource(time.Now().UnixNano())) for _, test := range test.actions { first, _ := pm.PortRange() @@ -356,7 +358,7 @@ func TestPortReservation(t *testing.T) { BindToDevice: test.device, Dest: test.dest, } - gotPort, err := pm.ReservePort(portRes, nil /* testPort */) + gotPort, err := pm.ReservePort(rng, portRes, nil /* testPort */) if diff := cmp.Diff(test.want, err); diff != "" { t.Fatalf("unexpected error from ReservePort(%+v, _), (-want, +got):\n%s", portRes, diff) } @@ -417,10 +419,11 @@ func TestPickEphemeralPort(t *testing.T) { } { t.Run(test.name, func(t *testing.T) { pm := NewPortManager() + rng := rand.New(rand.NewSource(time.Now().UnixNano())) if err := pm.SetPortRange(firstEphemeral, firstEphemeral+numEphemeralPorts); err != nil { t.Fatalf("failed to set ephemeral port range: %s", err) } - port, err := pm.PickEphemeralPort(test.f) + port, err := pm.PickEphemeralPort(rng, test.f) if diff := cmp.Diff(test.wantErr, err); diff != "" { t.Fatalf("unexpected error from PickEphemeralPort(..), (-want, +got):\n%s", diff) } diff --git a/pkg/tcpip/socketops.go b/pkg/tcpip/socketops.go index b26936b7f..0ea85f9ed 100644 --- a/pkg/tcpip/socketops.go +++ b/pkg/tcpip/socketops.go @@ -222,7 +222,7 @@ type SocketOptions struct { getReceiveBufferLimits GetReceiveBufferLimits `state:"manual"` // receiveBufferSize determines the receive buffer size for this socket. - receiveBufferSize int64 + receiveBufferSize atomicbitops.AlignedAtomicInt64 // mu protects the access to the below fields. mu sync.Mutex `state:"nosave"` @@ -601,9 +601,10 @@ func (so *SocketOptions) GetBindToDevice() int32 { return atomic.LoadInt32(&so.bindToDevice) } -// SetBindToDevice sets value for SO_BINDTODEVICE option. +// SetBindToDevice sets value for SO_BINDTODEVICE option. If bindToDevice is +// zero, the socket device binding is removed. func (so *SocketOptions) SetBindToDevice(bindToDevice int32) Error { - if !so.handler.HasNIC(bindToDevice) { + if bindToDevice != 0 && !so.handler.HasNIC(bindToDevice) { return &ErrUnknownDevice{} } @@ -653,13 +654,13 @@ func (so *SocketOptions) SetSendBufferSize(sendBufferSize int64, notify bool) { // GetReceiveBufferSize gets value for SO_RCVBUF option. func (so *SocketOptions) GetReceiveBufferSize() int64 { - return atomic.LoadInt64(&so.receiveBufferSize) + return so.receiveBufferSize.Load() } // SetReceiveBufferSize sets value for SO_RCVBUF option. func (so *SocketOptions) SetReceiveBufferSize(receiveBufferSize int64, notify bool) { if !notify { - atomic.StoreInt64(&so.receiveBufferSize, receiveBufferSize) + so.receiveBufferSize.Store(receiveBufferSize) return } @@ -684,8 +685,8 @@ func (so *SocketOptions) SetReceiveBufferSize(receiveBufferSize int64, notify bo v = math.MaxInt32 } - oldSz := atomic.LoadInt64(&so.receiveBufferSize) + oldSz := so.receiveBufferSize.Load() // Notify endpoint about change in buffer size. newSz := so.handler.OnSetReceiveBufferSize(v, oldSz) - atomic.StoreInt64(&so.receiveBufferSize, newSz) + so.receiveBufferSize.Store(newSz) } diff --git a/pkg/tcpip/stack/BUILD b/pkg/tcpip/stack/BUILD index 84aa6a9e4..395ff9a07 100644 --- a/pkg/tcpip/stack/BUILD +++ b/pkg/tcpip/stack/BUILD @@ -56,6 +56,7 @@ go_library( "neighbor_entry_list.go", "neighborstate_string.go", "nic.go", + "nic_stats.go", "nud.go", "packet_buffer.go", "packet_buffer_list.go", diff --git a/pkg/tcpip/stack/conntrack.go b/pkg/tcpip/stack/conntrack.go index 5720e7543..18e0d4374 100644 --- a/pkg/tcpip/stack/conntrack.go +++ b/pkg/tcpip/stack/conntrack.go @@ -35,7 +35,6 @@ import ( // Currently, only TCP tracking is supported. // Our hash table has 16K buckets. -// TODO(gvisor.dev/issue/170): These should be tunable. const numBuckets = 1 << 14 // Direction of the tuple. @@ -125,6 +124,8 @@ type conn struct { tcb tcpconntrack.TCB // lastUsed is the last time the connection saw a relevant packet, and // is updated by each packet on the connection. It is protected by mu. + // + // TODO(gvisor.dev/issue/5939): do not use the ambient clock. lastUsed time.Time `state:".(unixTime)"` } @@ -163,8 +164,6 @@ func (cn *conn) updateLocked(tcpHeader header.TCP, hook Hook) { // Update the state of tcb. tcb assumes it's always initialized on the // client. However, we only need to know whether the connection is // established or not, so the client/server distinction isn't important. - // TODO(gvisor.dev/issue/170): Add support in tcpconntrack to handle - // other tcp states. if cn.tcb.IsEmpty() { cn.tcb.Init(tcpHeader) } else if hook == cn.tcbHook { @@ -244,8 +243,7 @@ func (ct *ConnTrack) init() { // connFor gets the conn for pkt if it exists, or returns nil // if it does not. It returns an error when pkt does not contain a valid TCP // header. -// TODO(gvisor.dev/issue/170): Only TCP packets are supported. Need to support -// other transport protocols. +// TODO(gvisor.dev/issue/6168): Support UDP. func (ct *ConnTrack) connFor(pkt *PacketBuffer) (*conn, direction) { tid, err := packetToTupleID(pkt) if err != nil { @@ -383,7 +381,7 @@ func (ct *ConnTrack) handlePacket(pkt *PacketBuffer, hook Hook, r *Route) bool { return false } - // TODO(gvisor.dev/issue/170): Support other transport protocols. + // TODO(gvisor.dev/issue/6168): Support UDP. if pkt.Network().TransportProtocol() != header.TCPProtocolNumber { return false } @@ -464,8 +462,6 @@ func (ct *ConnTrack) handlePacket(pkt *PacketBuffer, hook Hook, r *Route) bool { } // Update the state of tcb. - // TODO(gvisor.dev/issue/170): Add support in tcpcontrack to handle - // other tcp states. conn.mu.Lock() defer conn.mu.Unlock() @@ -542,8 +538,6 @@ func (ct *ConnTrack) bucket(id tupleID) int { // reapUnused returns the next bucket that should be checked and the time after // which it should be called again. func (ct *ConnTrack) reapUnused(start int, prevInterval time.Duration) (int, time.Duration) { - // TODO(gvisor.dev/issue/170): This can be more finely controlled, as - // it is in Linux via sysctl. const fractionPerReaping = 128 const maxExpiredPct = 50 const maxFullTraversal = 60 * time.Second diff --git a/pkg/tcpip/stack/forwarding_test.go b/pkg/tcpip/stack/forwarding_test.go index ff555722e..72f66441f 100644 --- a/pkg/tcpip/stack/forwarding_test.go +++ b/pkg/tcpip/stack/forwarding_test.go @@ -23,6 +23,7 @@ import ( "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" + "gvisor.dev/gvisor/pkg/tcpip/faketime" "gvisor.dev/gvisor/pkg/tcpip/header" ) @@ -54,6 +55,11 @@ type fwdTestNetworkEndpoint struct { nic NetworkInterface proto *fwdTestNetworkProtocol dispatcher TransportDispatcher + + mu struct { + sync.RWMutex + forwarding bool + } } func (*fwdTestNetworkEndpoint) Enable() tcpip.Error { @@ -109,10 +115,6 @@ func (f *fwdTestNetworkEndpoint) MaxHeaderLength() uint16 { return f.nic.MaxHeaderLength() + fwdTestNetHeaderLen } -func (*fwdTestNetworkEndpoint) PseudoHeaderChecksum(protocol tcpip.TransportProtocolNumber, dstAddr tcpip.Address) uint16 { - return 0 -} - func (f *fwdTestNetworkEndpoint) NetworkProtocolNumber() tcpip.NetworkProtocolNumber { return f.proto.Number() } @@ -129,7 +131,7 @@ func (f *fwdTestNetworkEndpoint) WritePacket(r *Route, params NetworkHeaderParam } // WritePackets implements LinkEndpoint.WritePackets. -func (*fwdTestNetworkEndpoint) WritePackets(r *Route, pkts PacketBufferList, params NetworkHeaderParams) (int, tcpip.Error) { +func (*fwdTestNetworkEndpoint) WritePackets(*Route, PacketBufferList, NetworkHeaderParams) (int, tcpip.Error) { panic("not implemented") } @@ -169,11 +171,6 @@ type fwdTestNetworkProtocol struct { addrResolveDelay time.Duration onLinkAddressResolved func(*neighborCache, tcpip.Address, tcpip.LinkAddress) onResolveStaticAddress func(tcpip.Address) (tcpip.LinkAddress, bool) - - mu struct { - sync.RWMutex - forwarding bool - } } func (*fwdTestNetworkProtocol) Number() tcpip.NetworkProtocolNumber { @@ -224,7 +221,7 @@ func (*fwdTestNetworkProtocol) Wait() {} func (f *fwdTestNetworkEndpoint) LinkAddressRequest(addr, _ tcpip.Address, remoteLinkAddr tcpip.LinkAddress) tcpip.Error { if fn := f.proto.onLinkAddressResolved; fn != nil { - time.AfterFunc(f.proto.addrResolveDelay, func() { + f.proto.stack.clock.AfterFunc(f.proto.addrResolveDelay, func() { fn(f.proto.neigh, addr, remoteLinkAddr) }) } @@ -242,16 +239,16 @@ func (*fwdTestNetworkEndpoint) LinkAddressProtocol() tcpip.NetworkProtocolNumber return fwdTestNetNumber } -// Forwarding implements stack.ForwardingNetworkProtocol. -func (f *fwdTestNetworkProtocol) Forwarding() bool { +// Forwarding implements stack.ForwardingNetworkEndpoint. +func (f *fwdTestNetworkEndpoint) Forwarding() bool { f.mu.RLock() defer f.mu.RUnlock() return f.mu.forwarding } -// SetForwarding implements stack.ForwardingNetworkProtocol. -func (f *fwdTestNetworkProtocol) SetForwarding(v bool) { +// SetForwarding implements stack.ForwardingNetworkEndpoint. +func (f *fwdTestNetworkEndpoint) SetForwarding(v bool) { f.mu.Lock() defer f.mu.Unlock() f.mu.forwarding = v @@ -319,7 +316,7 @@ func (e *fwdTestLinkEndpoint) LinkAddress() tcpip.LinkAddress { return e.linkAddr } -func (e fwdTestLinkEndpoint) WritePacket(r RouteInfo, protocol tcpip.NetworkProtocolNumber, pkt *PacketBuffer) tcpip.Error { +func (e fwdTestLinkEndpoint) WritePacket(r RouteInfo, _ tcpip.NetworkProtocolNumber, pkt *PacketBuffer) tcpip.Error { p := fwdTestPacketInfo{ RemoteLinkAddress: r.RemoteLinkAddress, LocalLinkAddress: r.LocalLinkAddress, @@ -354,17 +351,19 @@ func (*fwdTestLinkEndpoint) ARPHardwareType() header.ARPHardwareType { } // AddHeader implements stack.LinkEndpoint.AddHeader. -func (e *fwdTestLinkEndpoint) AddHeader(local, remote tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *PacketBuffer) { +func (e *fwdTestLinkEndpoint) AddHeader(tcpip.LinkAddress, tcpip.LinkAddress, tcpip.NetworkProtocolNumber, *PacketBuffer) { panic("not implemented") } -func fwdTestNetFactory(t *testing.T, proto *fwdTestNetworkProtocol) (ep1, ep2 *fwdTestLinkEndpoint) { +func fwdTestNetFactory(t *testing.T, proto *fwdTestNetworkProtocol) (*faketime.ManualClock, *fwdTestLinkEndpoint, *fwdTestLinkEndpoint) { + clock := faketime.NewManualClock() // Create a stack with the network protocol and two NICs. s := New(Options{ NetworkProtocols: []NetworkProtocolFactory{func(s *Stack) NetworkProtocol { proto.stack = s return proto }}, + Clock: clock, }) protoNum := proto.Number() @@ -373,7 +372,7 @@ func fwdTestNetFactory(t *testing.T, proto *fwdTestNetworkProtocol) (ep1, ep2 *f } // NIC 1 has the link address "a", and added the network address 1. - ep1 = &fwdTestLinkEndpoint{ + ep1 := &fwdTestLinkEndpoint{ C: make(chan fwdTestPacketInfo, 300), mtu: fwdTestNetDefaultMTU, linkAddr: "a", @@ -386,7 +385,7 @@ func fwdTestNetFactory(t *testing.T, proto *fwdTestNetworkProtocol) (ep1, ep2 *f } // NIC 2 has the link address "b", and added the network address 2. - ep2 = &fwdTestLinkEndpoint{ + ep2 := &fwdTestLinkEndpoint{ C: make(chan fwdTestPacketInfo, 300), mtu: fwdTestNetDefaultMTU, linkAddr: "b", @@ -416,7 +415,7 @@ func fwdTestNetFactory(t *testing.T, proto *fwdTestNetworkProtocol) (ep1, ep2 *f s.SetRouteTable([]tcpip.Route{{Destination: subnet, NIC: 2}}) } - return ep1, ep2 + return clock, ep1, ep2 } func TestForwardingWithStaticResolver(t *testing.T) { @@ -432,7 +431,7 @@ func TestForwardingWithStaticResolver(t *testing.T) { }, } - ep1, ep2 := fwdTestNetFactory(t, proto) + clock, ep1, ep2 := fwdTestNetFactory(t, proto) // Inject an inbound packet to address 3 on NIC 1, and see if it is // forwarded to NIC 2. @@ -444,6 +443,7 @@ func TestForwardingWithStaticResolver(t *testing.T) { var p fwdTestPacketInfo + clock.Advance(proto.addrResolveDelay) select { case p = <-ep2.C: default: @@ -475,7 +475,7 @@ func TestForwardingWithFakeResolver(t *testing.T) { }) }, } - ep1, ep2 := fwdTestNetFactory(t, &proto) + clock, ep1, ep2 := fwdTestNetFactory(t, &proto) // Inject an inbound packet to address 3 on NIC 1, and see if it is // forwarded to NIC 2. @@ -487,9 +487,10 @@ func TestForwardingWithFakeResolver(t *testing.T) { var p fwdTestPacketInfo + clock.Advance(proto.addrResolveDelay) select { case p = <-ep2.C: - case <-time.After(time.Second): + default: t.Fatal("packet not forwarded") } @@ -508,7 +509,7 @@ func TestForwardingWithNoResolver(t *testing.T) { // Whether or not we use the neighbor cache here does not matter since // neither linkAddrCache nor neighborCache will be used. - ep1, ep2 := fwdTestNetFactory(t, proto) + clock, ep1, ep2 := fwdTestNetFactory(t, proto) // inject an inbound packet to address 3 on NIC 1, and see if it is // forwarded to NIC 2. @@ -518,10 +519,11 @@ func TestForwardingWithNoResolver(t *testing.T) { Data: buf.ToVectorisedView(), })) + clock.Advance(proto.addrResolveDelay) select { case <-ep2.C: t.Fatal("Packet should not be forwarded") - case <-time.After(time.Second): + default: } } @@ -533,7 +535,7 @@ func TestForwardingResolutionFailsForQueuedPackets(t *testing.T) { }, } - ep1, ep2 := fwdTestNetFactory(t, proto) + clock, ep1, ep2 := fwdTestNetFactory(t, proto) const numPackets int = 5 // These packets will all be enqueued in the packet queue to wait for link @@ -547,12 +549,12 @@ func TestForwardingResolutionFailsForQueuedPackets(t *testing.T) { } // All packets should fail resolution. - // TODO(gvisor.dev/issue/5141): Use a fake clock. for i := 0; i < numPackets; i++ { + clock.Advance(proto.addrResolveDelay) select { case got := <-ep2.C: t.Fatalf("got %#v; packets should have failed resolution and not been forwarded", got) - case <-time.After(100 * time.Millisecond): + default: } } } @@ -576,7 +578,7 @@ func TestForwardingWithFakeResolverPartialTimeout(t *testing.T) { } }, } - ep1, ep2 := fwdTestNetFactory(t, &proto) + clock, ep1, ep2 := fwdTestNetFactory(t, &proto) // Inject an inbound packet to address 4 on NIC 1. This packet should // not be forwarded. @@ -596,9 +598,10 @@ func TestForwardingWithFakeResolverPartialTimeout(t *testing.T) { var p fwdTestPacketInfo + clock.Advance(proto.addrResolveDelay) select { case p = <-ep2.C: - case <-time.After(time.Second): + default: t.Fatal("packet not forwarded") } @@ -631,7 +634,7 @@ func TestForwardingWithFakeResolverTwoPackets(t *testing.T) { }) }, } - ep1, ep2 := fwdTestNetFactory(t, &proto) + clock, ep1, ep2 := fwdTestNetFactory(t, &proto) // Inject two inbound packets to address 3 on NIC 1. for i := 0; i < 2; i++ { @@ -645,9 +648,10 @@ func TestForwardingWithFakeResolverTwoPackets(t *testing.T) { for i := 0; i < 2; i++ { var p fwdTestPacketInfo + clock.Advance(proto.addrResolveDelay) select { case p = <-ep2.C: - case <-time.After(time.Second): + default: t.Fatal("packet not forwarded") } @@ -681,7 +685,7 @@ func TestForwardingWithFakeResolverManyPackets(t *testing.T) { }) }, } - ep1, ep2 := fwdTestNetFactory(t, &proto) + clock, ep1, ep2 := fwdTestNetFactory(t, &proto) for i := 0; i < maxPendingPacketsPerResolution+5; i++ { // Inject inbound 'maxPendingPacketsPerResolution + 5' packets on NIC 1. @@ -697,9 +701,10 @@ func TestForwardingWithFakeResolverManyPackets(t *testing.T) { for i := 0; i < maxPendingPacketsPerResolution; i++ { var p fwdTestPacketInfo + clock.Advance(proto.addrResolveDelay) select { case p = <-ep2.C: - case <-time.After(time.Second): + default: t.Fatal("packet not forwarded") } @@ -745,7 +750,7 @@ func TestForwardingWithFakeResolverManyResolutions(t *testing.T) { }) }, } - ep1, ep2 := fwdTestNetFactory(t, &proto) + clock, ep1, ep2 := fwdTestNetFactory(t, &proto) for i := 0; i < maxPendingResolutions+5; i++ { // Inject inbound 'maxPendingResolutions + 5' packets on NIC 1. @@ -761,9 +766,10 @@ func TestForwardingWithFakeResolverManyResolutions(t *testing.T) { for i := 0; i < maxPendingResolutions; i++ { var p fwdTestPacketInfo + clock.Advance(proto.addrResolveDelay) select { case p = <-ep2.C: - case <-time.After(time.Second): + default: t.Fatal("packet not forwarded") } diff --git a/pkg/tcpip/stack/iptables.go b/pkg/tcpip/stack/iptables.go index 3670d5995..f152c0d83 100644 --- a/pkg/tcpip/stack/iptables.go +++ b/pkg/tcpip/stack/iptables.go @@ -42,7 +42,7 @@ const reaperDelay = 5 * time.Second // DefaultTables returns a default set of tables. Each chain is set to accept // all packets. -func DefaultTables() *IPTables { +func DefaultTables(seed uint32) *IPTables { return &IPTables{ v4Tables: [NumTables]Table{ NATID: { @@ -182,7 +182,7 @@ func DefaultTables() *IPTables { Postrouting: {MangleID, NATID}, }, connections: ConnTrack{ - seed: generateRandUint32(), + seed: seed, }, reaperDone: make(chan struct{}, 1), } @@ -268,10 +268,6 @@ const ( // should continue traversing the network stack and false when it should be // dropped. // -// TODO(gvisor.dev/issue/170): PacketBuffer should hold the route, from -// which address can be gathered. Currently, address is only needed for -// prerouting. -// // Precondition: pkt.NetworkHeader is set. func (it *IPTables) Check(hook Hook, pkt *PacketBuffer, r *Route, preroutingAddr tcpip.Address, inNicName, outNicName string) bool { if pkt.NetworkProtocolNumber != header.IPv4ProtocolNumber && pkt.NetworkProtocolNumber != header.IPv6ProtocolNumber { @@ -371,6 +367,7 @@ func (it *IPTables) startReaper(interval time.Duration) { select { case <-it.reaperDone: return + // TODO(gvisor.dev/issue/5939): do not use the ambient clock. case <-time.After(interval): bucket, interval = it.connections.reapUnused(bucket, interval) } diff --git a/pkg/tcpip/stack/iptables_targets.go b/pkg/tcpip/stack/iptables_targets.go index 2812c89aa..91e266de8 100644 --- a/pkg/tcpip/stack/iptables_targets.go +++ b/pkg/tcpip/stack/iptables_targets.go @@ -87,9 +87,6 @@ func (*ReturnTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, tcpip.Addre // destination port/IP. Outgoing packets are redirected to the loopback device, // and incoming packets are redirected to the incoming interface (rather than // forwarded). -// -// TODO(gvisor.dev/issue/170): Other flags need to be added after we support -// them. type RedirectTarget struct { // Port indicates port used to redirect. It is immutable. Port uint16 @@ -100,9 +97,6 @@ type RedirectTarget struct { } // Action implements Target.Action. -// TODO(gvisor.dev/issue/170): Parse headers without copying. The current -// implementation only works for Prerouting and calls pkt.Clone(), neither -// of which should be the case. func (rt *RedirectTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, r *Route, address tcpip.Address) (RuleVerdict, int) { // Sanity check. if rt.NetworkProtocol != pkt.NetworkProtocolNumber { @@ -136,8 +130,6 @@ func (rt *RedirectTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, r panic("redirect target is supported only on output and prerouting hooks") } - // TODO(gvisor.dev/issue/170): Check Flags in RedirectTarget if - // we need to change dest address (for OUTPUT chain) or ports. switch protocol := pkt.TransportProtocolNumber; protocol { case header.UDPProtocolNumber: udpHeader := header.UDP(pkt.TransportHeader().View()) diff --git a/pkg/tcpip/stack/iptables_types.go b/pkg/tcpip/stack/iptables_types.go index 93592e7f5..66e5f22ac 100644 --- a/pkg/tcpip/stack/iptables_types.go +++ b/pkg/tcpip/stack/iptables_types.go @@ -242,7 +242,6 @@ type IPHeaderFilter struct { func (fl IPHeaderFilter) match(pkt *PacketBuffer, hook Hook, inNicName, outNicName string) bool { // Extract header fields. var ( - // TODO(gvisor.dev/issue/170): Support other filter fields. transProto tcpip.TransportProtocolNumber dstAddr tcpip.Address srcAddr tcpip.Address @@ -291,7 +290,6 @@ func (fl IPHeaderFilter) match(pkt *PacketBuffer, hook Hook, inNicName, outNicNa return true case Postrouting: - // TODO(gvisor.dev/issue/170): Add the check for POSTROUTING. return true default: panic(fmt.Sprintf("unknown hook: %d", hook)) diff --git a/pkg/tcpip/stack/ndp_test.go b/pkg/tcpip/stack/ndp_test.go index d4ac9e1f8..b5c6626d6 100644 --- a/pkg/tcpip/stack/ndp_test.go +++ b/pkg/tcpip/stack/ndp_test.go @@ -16,14 +16,14 @@ package stack_test import ( "bytes" - "context" "encoding/binary" "fmt" + "math/rand" "testing" "time" "github.com/google/go-cmp/cmp" - "gvisor.dev/gvisor/pkg/rand" + cryptorand "gvisor.dev/gvisor/pkg/rand" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" "gvisor.dev/gvisor/pkg/tcpip/checker" @@ -112,11 +112,12 @@ type ndpDADEvent struct { res stack.DADResult } -type ndpRouterEvent struct { - nicID tcpip.NICID - addr tcpip.Address - // true if router was discovered, false if invalidated. - discovered bool +type ndpOffLinkRouteEvent struct { + nicID tcpip.NICID + subnet tcpip.Subnet + router tcpip.Address + // true if route was updated, false if invalidated. + updated bool } type ndpPrefixEvent struct { @@ -167,10 +168,8 @@ var _ ipv6.NDPDispatcher = (*ndpDispatcher)(nil) // related events happen for test purposes. type ndpDispatcher struct { dadC chan ndpDADEvent - routerC chan ndpRouterEvent - rememberRouter bool + offLinkRouteC chan ndpOffLinkRouteEvent prefixC chan ndpPrefixEvent - rememberPrefix bool autoGenAddrC chan ndpAutoGenAddrEvent rdnssC chan ndpRDNSSEvent dnsslC chan ndpDNSSLEvent @@ -189,32 +188,32 @@ func (n *ndpDispatcher) OnDuplicateAddressDetectionResult(nicID tcpip.NICID, add } } -// Implements ipv6.NDPDispatcher.OnDefaultRouterDiscovered. -func (n *ndpDispatcher) OnDefaultRouterDiscovered(nicID tcpip.NICID, addr tcpip.Address) bool { - if c := n.routerC; c != nil { - c <- ndpRouterEvent{ +// Implements ipv6.NDPDispatcher.OnOffLinkRouteUpdated. +func (n *ndpDispatcher) OnOffLinkRouteUpdated(nicID tcpip.NICID, subnet tcpip.Subnet, router tcpip.Address) { + if c := n.offLinkRouteC; c != nil { + c <- ndpOffLinkRouteEvent{ nicID, - addr, + subnet, + router, true, } } - - return n.rememberRouter } -// Implements ipv6.NDPDispatcher.OnDefaultRouterInvalidated. -func (n *ndpDispatcher) OnDefaultRouterInvalidated(nicID tcpip.NICID, addr tcpip.Address) { - if c := n.routerC; c != nil { - c <- ndpRouterEvent{ +// Implements ipv6.NDPDispatcher.OnOffLinkRouteInvalidated. +func (n *ndpDispatcher) OnOffLinkRouteInvalidated(nicID tcpip.NICID, subnet tcpip.Subnet, router tcpip.Address) { + if c := n.offLinkRouteC; c != nil { + c <- ndpOffLinkRouteEvent{ nicID, - addr, + subnet, + router, false, } } } // Implements ipv6.NDPDispatcher.OnOnLinkPrefixDiscovered. -func (n *ndpDispatcher) OnOnLinkPrefixDiscovered(nicID tcpip.NICID, prefix tcpip.Subnet) bool { +func (n *ndpDispatcher) OnOnLinkPrefixDiscovered(nicID tcpip.NICID, prefix tcpip.Subnet) { if c := n.prefixC; c != nil { c <- ndpPrefixEvent{ nicID, @@ -222,8 +221,6 @@ func (n *ndpDispatcher) OnOnLinkPrefixDiscovered(nicID tcpip.NICID, prefix tcpip true, } } - - return n.rememberPrefix } // Implements ipv6.NDPDispatcher.OnOnLinkPrefixInvalidated. @@ -237,7 +234,7 @@ func (n *ndpDispatcher) OnOnLinkPrefixInvalidated(nicID tcpip.NICID, prefix tcpi } } -func (n *ndpDispatcher) OnAutoGenAddress(nicID tcpip.NICID, addr tcpip.AddressWithPrefix) bool { +func (n *ndpDispatcher) OnAutoGenAddress(nicID tcpip.NICID, addr tcpip.AddressWithPrefix) { if c := n.autoGenAddrC; c != nil { c <- ndpAutoGenAddrEvent{ nicID, @@ -245,7 +242,6 @@ func (n *ndpDispatcher) OnAutoGenAddress(nicID tcpip.NICID, addr tcpip.AddressWi newAddr, } } - return true } func (n *ndpDispatcher) OnAutoGenAddressDeprecated(nicID tcpip.NICID, addr tcpip.AddressWithPrefix) { @@ -481,13 +477,9 @@ func TestDADResolve(t *testing.T) { } for _, test := range tests { - test := test - t.Run(test.name, func(t *testing.T) { - t.Parallel() - ndpDisp := ndpDispatcher{ - dadC: make(chan ndpDADEvent), + dadC: make(chan ndpDADEvent, 1), } e := channelLinkWithHeaderLength{ @@ -499,8 +491,11 @@ func TestDADResolve(t *testing.T) { var secureRNG bytes.Reader secureRNG.Reset(secureRNGBytes) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ - SecureRNG: &secureRNG, + Clock: clock, + RandSource: rand.NewSource(time.Now().UnixNano()), + SecureRNG: &secureRNG, NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPDisp: &ndpDisp, DADConfigs: stack.DADConfigurations{ @@ -529,14 +524,10 @@ func TestDADResolve(t *testing.T) { t.Fatalf("AddAddressWithPrefix(%d, %d, %s) = %s", nicID, header.IPv6ProtocolNumber, addrWithPrefix, err) } - // Address should not be considered bound to the NIC yet (DAD ongoing). - if err := checkGetMainNICAddress(s, nicID, header.IPv6ProtocolNumber, tcpip.AddressWithPrefix{}); err != nil { - t.Fatal(err) - } - // Make sure the address does not resolve before the resolution time has // passed. - time.Sleep(test.expectedRetransmitTimer*time.Duration(test.dupAddrDetectTransmits) - defaultAsyncNegativeEventTimeout) + const delta = time.Nanosecond + clock.Advance(test.expectedRetransmitTimer*time.Duration(test.dupAddrDetectTransmits) - delta) if err := checkGetMainNICAddress(s, nicID, header.IPv6ProtocolNumber, tcpip.AddressWithPrefix{}); err != nil { t.Error(err) } @@ -566,13 +557,14 @@ func TestDADResolve(t *testing.T) { } // Wait for DAD to resolve. + clock.Advance(delta) select { - case <-time.After(defaultAsyncPositiveEventTimeout): - t.Fatal("timed out waiting for DAD resolution") case e := <-ndpDisp.dadC: if diff := checkDADEvent(e, nicID, addr1, &stack.DADSucceeded{}); diff != "" { t.Errorf("DAD event mismatch (-want +got):\n%s", diff) } + default: + t.Fatalf("expected DAD event for %s on NIC(%d)", addr1, nicID) } if err := checkGetMainNICAddress(s, nicID, header.IPv6ProtocolNumber, addrWithPrefix); err != nil { t.Error(err) @@ -610,7 +602,10 @@ func TestDADResolve(t *testing.T) { // Validate the sent Neighbor Solicitation messages. for i := uint8(0); i < test.dupAddrDetectTransmits; i++ { - p, _ := e.ReadContext(context.Background()) + p, ok := e.Read() + if !ok { + t.Fatal("packet didn't arrive") + } // Make sure its an IPv6 packet. if p.Proto != header.IPv6ProtocolNumber { @@ -736,11 +731,13 @@ func TestDADFail(t *testing.T) { dadConfigs.RetransmitTimer = time.Second * 2 e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPDisp: &ndpDisp, DADConfigs: dadConfigs, })}, + Clock: clock, }) if err := s.CreateNIC(nicID, e); err != nil { t.Fatalf("CreateNIC(%d, _) = %s", nicID, err) @@ -766,16 +763,17 @@ func TestDADFail(t *testing.T) { // Wait for DAD to fail and make sure the address did // not get resolved. + clock.Advance(time.Duration(dadConfigs.DupAddrDetectTransmits) * dadConfigs.RetransmitTimer) select { - case <-time.After(time.Duration(dadConfigs.DupAddrDetectTransmits)*dadConfigs.RetransmitTimer + time.Second): - // If we don't get a failure event after the - // expected resolution time + extra 1s buffer, - // something is wrong. - t.Fatal("timed out waiting for DAD failure") case e := <-ndpDisp.dadC: if diff := checkDADEvent(e, nicID, addr1, &stack.DADDupAddrDetected{HolderLinkAddress: test.expectedHolderLinkAddress}); diff != "" { t.Errorf("DAD event mismatch (-want +got):\n%s", diff) } + default: + // If we don't get a failure event after the + // expected resolution time + extra 1s buffer, + // something is wrong. + t.Fatal("timed out waiting for DAD failure") } if err := checkGetMainNICAddress(s, nicID, header.IPv6ProtocolNumber, tcpip.AddressWithPrefix{}); err != nil { t.Fatal(err) @@ -844,11 +842,13 @@ func TestDADStop(t *testing.T) { } e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPDisp: &ndpDisp, DADConfigs: dadConfigs, })}, + Clock: clock, }) if err := s.CreateNIC(nicID, e); err != nil { t.Fatalf("CreateNIC(%d, _): %s", nicID, err) @@ -866,15 +866,16 @@ func TestDADStop(t *testing.T) { test.stopFn(t, s) // Wait for DAD to fail (since the address was removed during DAD). + clock.Advance(time.Duration(dadConfigs.DupAddrDetectTransmits) * dadConfigs.RetransmitTimer) select { - case <-time.After(time.Duration(dadConfigs.DupAddrDetectTransmits)*dadConfigs.RetransmitTimer + time.Second): - // If we don't get a failure event after the expected resolution - // time + extra 1s buffer, something is wrong. - t.Fatal("timed out waiting for DAD failure") case e := <-ndpDisp.dadC: if diff := checkDADEvent(e, nicID, addr1, &stack.DADAborted{}); diff != "" { t.Errorf("DAD event mismatch (-want +got):\n%s", diff) } + default: + // If we don't get a failure event after the expected resolution + // time + extra 1s buffer, something is wrong. + t.Fatal("timed out waiting for DAD failure") } if !test.skipFinalAddrCheck { @@ -925,10 +926,12 @@ func TestSetNDPConfigurations(t *testing.T) { dadC: make(chan ndpDADEvent, 1), } e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPDisp: &ndpDisp, })}, + Clock: clock, }) expectDADEvent := func(nicID tcpip.NICID, addr tcpip.Address) { @@ -1007,28 +1010,23 @@ func TestSetNDPConfigurations(t *testing.T) { t.Fatal(err) } - // Sleep until right (500ms before) before resolution to - // make sure the address didn't resolve on NIC(1) yet. - const delta = 500 * time.Millisecond - time.Sleep(time.Duration(test.dupAddrDetectTransmits)*test.expectedRetransmitTimer - delta) + // Sleep until right before resolution to make sure the address didn't + // resolve on NIC(1) yet. + const delta = 1 + clock.Advance(time.Duration(test.dupAddrDetectTransmits)*test.expectedRetransmitTimer - delta) if err := checkGetMainNICAddress(s, nicID1, header.IPv6ProtocolNumber, tcpip.AddressWithPrefix{}); err != nil { t.Fatal(err) } // Wait for DAD to resolve. + clock.Advance(delta) select { - case <-time.After(2 * delta): - // We should get a resolution event after 500ms - // (delta) since we wait for 500ms less than the - // expected resolution time above to make sure - // that the address did not yet resolve. Waiting - // for 1s (2x delta) without a resolution event - // means something is wrong. - t.Fatal("timed out waiting for DAD resolution") case e := <-ndpDisp.dadC: if diff := checkDADEvent(e, nicID1, addr1, &stack.DADSucceeded{}); diff != "" { t.Errorf("DAD event mismatch (-want +got):\n%s", diff) } + default: + t.Fatal("timed out waiting for DAD resolution") } if err := checkGetMainNICAddress(s, nicID1, header.IPv6ProtocolNumber, addrWithPrefix1); err != nil { t.Fatal(err) @@ -1040,7 +1038,7 @@ func TestSetNDPConfigurations(t *testing.T) { // raBufWithOptsAndDHCPv6 returns a valid NDP Router Advertisement with options // and DHCPv6 configurations specified. func raBufWithOptsAndDHCPv6(ip tcpip.Address, rl uint16, managedAddress, otherConfigurations bool, optSer header.NDPOptionsSerializer) *stack.PacketBuffer { - icmpSize := header.ICMPv6HeaderSize + header.NDPRAMinimumSize + int(optSer.Length()) + icmpSize := header.ICMPv6HeaderSize + header.NDPRAMinimumSize + optSer.Length() hdr := buffer.NewPrependable(header.IPv6MinimumSize + icmpSize) pkt := header.ICMPv6(hdr.Prepend(icmpSize)) pkt.SetType(header.ICMPv6RouterAdvert) @@ -1053,13 +1051,13 @@ func raBufWithOptsAndDHCPv6(ip tcpip.Address, rl uint16, managedAddress, otherCo if managedAddress { // The Managed Addresses flag field is the 7th bit of byte #1 (0-indexing) // of the RA payload. - raPayload[1] |= (1 << 7) + raPayload[1] |= 1 << 7 } // Populate the Other Configurations flag field. if otherConfigurations { // The Other Configurations flag field is the 6th bit of byte #1 // (0-indexing) of the RA payload. - raPayload[1] |= (1 << 6) + raPayload[1] |= 1 << 6 } opts := ra.Options() opts.Serialize(optSer) @@ -1203,9 +1201,9 @@ func TestDynamicConfigurationsDisabled(t *testing.T) { t.Run(fmt.Sprintf("HandleRAs(%s), Forwarding(%t), Enabled(%t)", handle, forwarding, enable), func(t *testing.T) { ndpDisp := ndpDispatcher{ - routerC: make(chan ndpRouterEvent, 1), - prefixC: make(chan ndpPrefixEvent, 1), - autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1), + offLinkRouteC: make(chan ndpOffLinkRouteEvent, 1), + prefixC: make(chan ndpPrefixEvent, 1), + autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1), } ndpConfigs := test.config(enable) ndpConfigs.HandleRAs = handle @@ -1275,8 +1273,8 @@ func TestDynamicConfigurationsDisabled(t *testing.T) { t.Errorf("got v6Stats.UnhandledRouterAdvertisements.Value() = %d, want = %d", got, want) } select { - case e := <-ndpDisp.routerC: - t.Errorf("unexpectedly discovered a router when configured not to: %#v", e) + case e := <-ndpDisp.offLinkRouteC: + t.Errorf("unexpectedly updated an off-link route when configured not to: %#v", e) default: } select { @@ -1303,9 +1301,9 @@ func boolToUint64(v bool) uint64 { } // Check e to make sure that the event is for addr on nic with ID 1, and the -// discovered flag set to discovered. -func checkRouterEvent(e ndpRouterEvent, addr tcpip.Address, discovered bool) string { - return cmp.Diff(ndpRouterEvent{nicID: 1, addr: addr, discovered: discovered}, e, cmp.AllowUnexported(e)) +// update flag set to updated. +func checkOffLinkRouteEvent(e ndpOffLinkRouteEvent, router tcpip.Address, updated bool) string { + return cmp.Diff(ndpOffLinkRouteEvent{nicID: 1, subnet: header.IPv6EmptySubnet, router: router, updated: updated}, e, cmp.AllowUnexported(e)) } func testWithRAs(t *testing.T, f func(*testing.T, ipv6.HandleRAsConfiguration, bool)) { @@ -1338,56 +1336,13 @@ func testWithRAs(t *testing.T, f func(*testing.T, ipv6.HandleRAsConfiguration, b } } -// TestRouterDiscoveryDispatcherNoRemember tests that the stack does not -// remember a discovered router when the dispatcher asks it not to. -func TestRouterDiscoveryDispatcherNoRemember(t *testing.T) { - ndpDisp := ndpDispatcher{ - routerC: make(chan ndpRouterEvent, 1), - } - e := channel.New(0, 1280, linkAddr1) - s := stack.New(stack.Options{ - NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ - NDPConfigs: ipv6.NDPConfigurations{ - HandleRAs: ipv6.HandlingRAsEnabledWhenForwardingDisabled, - DiscoverDefaultRouters: true, - }, - NDPDisp: &ndpDisp, - })}, - }) - - if err := s.CreateNIC(1, e); err != nil { - t.Fatalf("CreateNIC(1) = %s", err) - } - - // Receive an RA for a router we should not remember. - const lifetimeSeconds = 1 - e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, lifetimeSeconds)) - select { - case e := <-ndpDisp.routerC: - if diff := checkRouterEvent(e, llAddr2, true); diff != "" { - t.Errorf("router event mismatch (-want +got):\n%s", diff) - } - default: - t.Fatal("expected router discovery event") - } - - // Wait for the invalidation time plus some buffer to make sure we do - // not actually receive any invalidation events as we should not have - // remembered the router in the first place. - select { - case <-ndpDisp.routerC: - t.Fatal("should not have received any router events") - case <-time.After(lifetimeSeconds*time.Second + defaultAsyncNegativeEventTimeout): - } -} - func TestRouterDiscovery(t *testing.T) { testWithRAs(t, func(t *testing.T, handleRAs ipv6.HandleRAsConfiguration, forwarding bool) { ndpDisp := ndpDispatcher{ - routerC: make(chan ndpRouterEvent, 1), - rememberRouter: true, + offLinkRouteC: make(chan ndpOffLinkRouteEvent, 1), } e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPConfigs: ipv6.NDPConfigurations{ @@ -1396,30 +1351,32 @@ func TestRouterDiscovery(t *testing.T) { }, NDPDisp: &ndpDisp, })}, + Clock: clock, }) - expectRouterEvent := func(addr tcpip.Address, discovered bool) { + expectOffLinkRouteEvent := func(addr tcpip.Address, updated bool) { t.Helper() select { - case e := <-ndpDisp.routerC: - if diff := checkRouterEvent(e, addr, discovered); diff != "" { - t.Errorf("router event mismatch (-want +got):\n%s", diff) + case e := <-ndpDisp.offLinkRouteC: + if diff := checkOffLinkRouteEvent(e, addr, updated); diff != "" { + t.Errorf("off-link route event mismatch (-want +got):\n%s", diff) } default: t.Fatal("expected router discovery event") } } - expectAsyncRouterInvalidationEvent := func(addr tcpip.Address, timeout time.Duration) { + expectAsyncOffLinkRouteInvalidationEvent := func(addr tcpip.Address, timeout time.Duration) { t.Helper() + clock.Advance(timeout) select { - case e := <-ndpDisp.routerC: - if diff := checkRouterEvent(e, addr, false); diff != "" { - t.Errorf("router event mismatch (-want +got):\n%s", diff) + case e := <-ndpDisp.offLinkRouteC: + if diff := checkOffLinkRouteEvent(e, addr, false); diff != "" { + t.Errorf("off-link route event mismatch (-want +got):\n%s", diff) } - case <-time.After(timeout): + default: t.Fatal("timed out waiting for router discovery event") } } @@ -1436,26 +1393,26 @@ func TestRouterDiscovery(t *testing.T) { // remembered. e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, 0)) select { - case <-ndpDisp.routerC: - t.Fatal("unexpectedly discovered a router with 0 lifetime") + case <-ndpDisp.offLinkRouteC: + t.Fatal("unexpectedly updated an off-link route with 0 lifetime") default: } // Rx an RA from lladdr2 with a huge lifetime. e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, 1000)) - expectRouterEvent(llAddr2, true) + expectOffLinkRouteEvent(llAddr2, true) // Rx an RA from another router (lladdr3) with non-zero lifetime. const l3LifetimeSeconds = 6 e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr3, l3LifetimeSeconds)) - expectRouterEvent(llAddr3, true) + expectOffLinkRouteEvent(llAddr3, true) // Rx an RA from lladdr2 with lesser lifetime. const l2LifetimeSeconds = 2 e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, l2LifetimeSeconds)) select { - case <-ndpDisp.routerC: - t.Fatal("Should not receive a router event when updating lifetimes for known routers") + case <-ndpDisp.offLinkRouteC: + t.Fatal("should not receive a off-link route event when updating lifetimes for known routers") default: } @@ -1466,15 +1423,15 @@ func TestRouterDiscovery(t *testing.T) { // Wait for the normal lifetime plus an extra bit for the // router to get invalidated. If we don't get an invalidation // event after this time, then something is wrong. - expectAsyncRouterInvalidationEvent(llAddr2, l2LifetimeSeconds*time.Second+defaultAsyncPositiveEventTimeout) + expectAsyncOffLinkRouteInvalidationEvent(llAddr2, l2LifetimeSeconds*time.Second) // Rx an RA from lladdr2 with huge lifetime. e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, 1000)) - expectRouterEvent(llAddr2, true) + expectOffLinkRouteEvent(llAddr2, true) // Rx an RA from lladdr2 with zero lifetime. It should be invalidated. e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, 0)) - expectRouterEvent(llAddr2, false) + expectOffLinkRouteEvent(llAddr2, false) // Wait for lladdr3's router invalidation job to execute. The lifetime // of the router should have been updated to the most recent (smaller) @@ -1483,7 +1440,7 @@ func TestRouterDiscovery(t *testing.T) { // Wait for the normal lifetime plus an extra bit for the // router to get invalidated. If we don't get an invalidation // event after this time, then something is wrong. - expectAsyncRouterInvalidationEvent(llAddr3, l3LifetimeSeconds*time.Second+defaultAsyncPositiveEventTimeout) + expectAsyncOffLinkRouteInvalidationEvent(llAddr3, l3LifetimeSeconds*time.Second) }) } @@ -1491,8 +1448,7 @@ func TestRouterDiscovery(t *testing.T) { // ipv6.MaxDiscoveredDefaultRouters discovered routers are remembered. func TestRouterDiscoveryMaxRouters(t *testing.T) { ndpDisp := ndpDispatcher{ - routerC: make(chan ndpRouterEvent, 1), - rememberRouter: true, + offLinkRouteC: make(chan ndpOffLinkRouteEvent, 1), } e := channel.New(0, 1280, linkAddr1) s := stack.New(stack.Options{ @@ -1519,9 +1475,9 @@ func TestRouterDiscoveryMaxRouters(t *testing.T) { if i <= ipv6.MaxDiscoveredDefaultRouters { select { - case e := <-ndpDisp.routerC: - if diff := checkRouterEvent(e, llAddr, true); diff != "" { - t.Errorf("router event mismatch (-want +got):\n%s", diff) + case e := <-ndpDisp.offLinkRouteC: + if diff := checkOffLinkRouteEvent(e, llAddr, true); diff != "" { + t.Errorf("off-link route event mismatch (-want +got):\n%s", diff) } default: t.Fatal("expected router discovery event") @@ -1529,7 +1485,7 @@ func TestRouterDiscoveryMaxRouters(t *testing.T) { } else { select { - case <-ndpDisp.routerC: + case <-ndpDisp.offLinkRouteC: t.Fatal("should not have discovered a new router after we already discovered the max number of routers") default: } @@ -1543,51 +1499,6 @@ func checkPrefixEvent(e ndpPrefixEvent, prefix tcpip.Subnet, discovered bool) st return cmp.Diff(ndpPrefixEvent{nicID: 1, prefix: prefix, discovered: discovered}, e, cmp.AllowUnexported(e)) } -// TestPrefixDiscoveryDispatcherNoRemember tests that the stack does not -// remember a discovered on-link prefix when the dispatcher asks it not to. -func TestPrefixDiscoveryDispatcherNoRemember(t *testing.T) { - prefix, subnet, _ := prefixSubnetAddr(0, "") - - ndpDisp := ndpDispatcher{ - prefixC: make(chan ndpPrefixEvent, 1), - } - e := channel.New(0, 1280, linkAddr1) - s := stack.New(stack.Options{ - NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ - NDPConfigs: ipv6.NDPConfigurations{ - HandleRAs: ipv6.HandlingRAsEnabledWhenForwardingDisabled, - DiscoverOnLinkPrefixes: true, - }, - NDPDisp: &ndpDisp, - })}, - }) - - if err := s.CreateNIC(1, e); err != nil { - t.Fatalf("CreateNIC(1) = %s", err) - } - - // Receive an RA with prefix that we should not remember. - const lifetimeSeconds = 1 - e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, lifetimeSeconds, 0)) - select { - case e := <-ndpDisp.prefixC: - if diff := checkPrefixEvent(e, subnet, true); diff != "" { - t.Errorf("prefix event mismatch (-want +got):\n%s", diff) - } - default: - t.Fatal("expected prefix discovery event") - } - - // Wait for the invalidation time plus some buffer to make sure we do - // not actually receive any invalidation events as we should not have - // remembered the prefix in the first place. - select { - case <-ndpDisp.prefixC: - t.Fatal("should not have received any prefix events") - case <-time.After(lifetimeSeconds*time.Second + defaultAsyncNegativeEventTimeout): - } -} - func TestPrefixDiscovery(t *testing.T) { prefix1, subnet1, _ := prefixSubnetAddr(0, "") prefix2, subnet2, _ := prefixSubnetAddr(1, "") @@ -1595,10 +1506,10 @@ func TestPrefixDiscovery(t *testing.T) { testWithRAs(t, func(t *testing.T, handleRAs ipv6.HandleRAsConfiguration, forwarding bool) { ndpDisp := ndpDispatcher{ - prefixC: make(chan ndpPrefixEvent, 1), - rememberPrefix: true, + prefixC: make(chan ndpPrefixEvent, 1), } e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPConfigs: ipv6.NDPConfigurations{ @@ -1607,6 +1518,7 @@ func TestPrefixDiscovery(t *testing.T) { }, NDPDisp: &ndpDisp, })}, + Clock: clock, }) if err := s.CreateNIC(1, e); err != nil { @@ -1667,12 +1579,13 @@ func TestPrefixDiscovery(t *testing.T) { // Wait for prefix2's most recent invalidation job plus some buffer to // expire. + clock.Advance(time.Duration(lifetime) * time.Second) select { case e := <-ndpDisp.prefixC: if diff := checkPrefixEvent(e, subnet2, false); diff != "" { t.Errorf("prefix event mismatch (-want +got):\n%s", diff) } - case <-time.After(time.Duration(lifetime)*time.Second + defaultAsyncPositiveEventTimeout): + default: t.Fatal("timed out waiting for prefix discovery event") } @@ -1701,10 +1614,10 @@ func TestPrefixDiscoveryWithInfiniteLifetime(t *testing.T) { subnet := prefix.Subnet() ndpDisp := ndpDispatcher{ - prefixC: make(chan ndpPrefixEvent, 1), - rememberPrefix: true, + prefixC: make(chan ndpPrefixEvent, 1), } e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPConfigs: ipv6.NDPConfigurations{ @@ -1713,6 +1626,7 @@ func TestPrefixDiscoveryWithInfiniteLifetime(t *testing.T) { }, NDPDisp: &ndpDisp, })}, + Clock: clock, }) if err := s.CreateNIC(1, e); err != nil { @@ -1736,21 +1650,23 @@ func TestPrefixDiscoveryWithInfiniteLifetime(t *testing.T) { // with infinite valid lifetime which should not get invalidated. e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, testInfiniteLifetimeSeconds, 0)) expectPrefixEvent(subnet, true) + clock.Advance(testInfiniteLifetime) select { case <-ndpDisp.prefixC: t.Fatal("unexpectedly invalidated a prefix with infinite lifetime") - case <-time.After(testInfiniteLifetime + defaultAsyncNegativeEventTimeout): + default: } // Receive an RA with finite lifetime. // The prefix should get invalidated after 1s. e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, testInfiniteLifetimeSeconds-1, 0)) + clock.Advance(testInfiniteLifetime) select { case e := <-ndpDisp.prefixC: if diff := checkPrefixEvent(e, subnet, false); diff != "" { t.Errorf("prefix event mismatch (-want +got):\n%s", diff) } - case <-time.After(testInfiniteLifetime): + default: t.Fatal("timed out waiting for prefix discovery event") } @@ -1761,19 +1677,21 @@ func TestPrefixDiscoveryWithInfiniteLifetime(t *testing.T) { // Receive an RA with prefix with an infinite lifetime. // The prefix should not be invalidated. e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, testInfiniteLifetimeSeconds, 0)) + clock.Advance(testInfiniteLifetime) select { case <-ndpDisp.prefixC: t.Fatal("unexpectedly invalidated a prefix with infinite lifetime") - case <-time.After(testInfiniteLifetime + defaultAsyncNegativeEventTimeout): + default: } // Receive an RA with a prefix with a lifetime value greater than the // set infinite lifetime value. e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, testInfiniteLifetimeSeconds+1, 0)) + clock.Advance((testInfiniteLifetimeSeconds + 1) * time.Second) select { case <-ndpDisp.prefixC: t.Fatal("unexpectedly invalidated a prefix with infinite lifetime") - case <-time.After((testInfiniteLifetimeSeconds+1)*time.Second + defaultAsyncNegativeEventTimeout): + default: } // Receive an RA with 0 lifetime. @@ -1786,8 +1704,7 @@ func TestPrefixDiscoveryWithInfiniteLifetime(t *testing.T) { // ipv6.MaxDiscoveredOnLinkPrefixes discovered on-link prefixes are remembered. func TestPrefixDiscoveryMaxOnLinkPrefixes(t *testing.T) { ndpDisp := ndpDispatcher{ - prefixC: make(chan ndpPrefixEvent, ipv6.MaxDiscoveredOnLinkPrefixes+3), - rememberPrefix: true, + prefixC: make(chan ndpPrefixEvent, ipv6.MaxDiscoveredOnLinkPrefixes+3), } e := channel.New(0, 1280, linkAddr1) s := stack.New(stack.Options{ @@ -3618,6 +3535,7 @@ func TestAutoGenAddrRemoval(t *testing.T) { autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1), } e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPConfigs: ipv6.NDPConfigurations{ @@ -3626,6 +3544,7 @@ func TestAutoGenAddrRemoval(t *testing.T) { }, NDPDisp: &ndpDisp, })}, + Clock: clock, }) if err := s.CreateNIC(1, e); err != nil { @@ -3659,10 +3578,11 @@ func TestAutoGenAddrRemoval(t *testing.T) { // Wait for the original valid lifetime to make sure the original job got // cancelled/cleaned up. + clock.Advance(lifetimeSeconds * time.Second) select { case <-ndpDisp.autoGenAddrC: t.Fatal("unexpectedly received an auto gen addr event") - case <-time.After(lifetimeSeconds*time.Second + defaultAsyncNegativeEventTimeout): + default: } } @@ -3784,6 +3704,7 @@ func TestAutoGenAddrStaticConflict(t *testing.T) { autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1), } e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPConfigs: ipv6.NDPConfigurations{ @@ -3792,6 +3713,7 @@ func TestAutoGenAddrStaticConflict(t *testing.T) { }, NDPDisp: &ndpDisp, })}, + Clock: clock, }) if err := s.CreateNIC(1, e); err != nil { @@ -3821,30 +3743,36 @@ func TestAutoGenAddrStaticConflict(t *testing.T) { // Should not get an invalidation event after the PI's invalidation // time. + clock.Advance(lifetimeSeconds * time.Second) select { case <-ndpDisp.autoGenAddrC: t.Fatal("unexpectedly received an auto gen addr event") - case <-time.After(lifetimeSeconds*time.Second + defaultAsyncNegativeEventTimeout): + default: } if !containsV6Addr(s.NICInfo()[1].ProtocolAddresses, addr) { t.Fatalf("Should have %s in the list of addresses", addr1) } } +func makeSecretKey(t *testing.T) []byte { + secretKey := make([]byte, header.OpaqueIIDSecretKeyMinBytes) + n, err := cryptorand.Read(secretKey) + if err != nil { + t.Fatalf("cryptorand.Read(_): %s", err) + } + if l := len(secretKey); n != l { + t.Fatalf("got cryptorand.Read(_) = (%d, nil), want = (%d, nil)", n, l) + } + return secretKey +} + // TestAutoGenAddrWithOpaqueIID tests that SLAAC generated addresses will use // opaque interface identifiers when configured to do so. func TestAutoGenAddrWithOpaqueIID(t *testing.T) { const nicID = 1 const nicName = "nic1" - var secretKeyBuf [header.OpaqueIIDSecretKeyMinBytes]byte - secretKey := secretKeyBuf[:] - n, err := rand.Read(secretKey) - if err != nil { - t.Fatalf("rand.Read(_): %s", err) - } - if n != header.OpaqueIIDSecretKeyMinBytes { - t.Fatalf("got rand.Read(_) = (%d, _), want = (%d, _)", n, header.OpaqueIIDSecretKeyMinBytes) - } + + secretKey := makeSecretKey(t) prefix1, subnet1, _ := prefixSubnetAddr(0, linkAddr1) prefix2, subnet2, _ := prefixSubnetAddr(1, linkAddr1) @@ -3866,6 +3794,7 @@ func TestAutoGenAddrWithOpaqueIID(t *testing.T) { autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1), } e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPConfigs: ipv6.NDPConfigurations{ @@ -3880,6 +3809,7 @@ func TestAutoGenAddrWithOpaqueIID(t *testing.T) { SecretKey: secretKey, }, })}, + Clock: clock, }) opts := stack.NICOptions{Name: nicName} if err := s.CreateNICWithOptions(nicID, e, opts); err != nil { @@ -3918,12 +3848,13 @@ func TestAutoGenAddrWithOpaqueIID(t *testing.T) { } // Wait for addr of prefix1 to be invalidated. + clock.Advance(validLifetimeSecondPrefix1 * time.Second) select { case e := <-ndpDisp.autoGenAddrC: if diff := checkAutoGenAddrEvent(e, addr1, invalidatedAddr); diff != "" { t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff) } - case <-time.After(validLifetimeSecondPrefix1*time.Second + defaultAsyncPositiveEventTimeout): + default: t.Fatal("timed out waiting for addr auto gen event") } if containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) { @@ -3949,15 +3880,7 @@ func TestAutoGenAddrInResponseToDADConflicts(t *testing.T) { }() ipv6.MaxDesyncFactor = time.Nanosecond - var secretKeyBuf [header.OpaqueIIDSecretKeyMinBytes]byte - secretKey := secretKeyBuf[:] - n, err := rand.Read(secretKey) - if err != nil { - t.Fatalf("rand.Read(_): %s", err) - } - if n != header.OpaqueIIDSecretKeyMinBytes { - t.Fatalf("got rand.Read(_) = (%d, _), want = (%d, _)", n, header.OpaqueIIDSecretKeyMinBytes) - } + secretKey := makeSecretKey(t) prefix, subnet, _ := prefixSubnetAddr(0, linkAddr1) @@ -4236,13 +4159,12 @@ func TestAutoGenAddrWithEUI64IIDNoDADRetries(t *testing.T) { addrType := addrType t.Run(addrType.name, func(t *testing.T) { - t.Parallel() - ndpDisp := ndpDispatcher{ dadC: make(chan ndpDADEvent, 1), autoGenAddrC: make(chan ndpAutoGenAddrEvent, 2), } e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ AutoGenLinkLocal: addrType.autoGenLinkLocal, @@ -4253,6 +4175,7 @@ func TestAutoGenAddrWithEUI64IIDNoDADRetries(t *testing.T) { RetransmitTimer: retransmitTimer, }, })}, + Clock: clock, }) if err := s.CreateNIC(nicID, e); err != nil { t.Fatalf("CreateNIC(%d, _) = %s", nicID, err) @@ -4297,7 +4220,7 @@ func TestAutoGenAddrWithEUI64IIDNoDADRetries(t *testing.T) { select { case e := <-ndpDisp.autoGenAddrC: t.Fatalf("unexpectedly got an auto-generated address event = %+v", e) - case <-time.After(defaultAsyncNegativeEventTimeout): + default: } }) } @@ -4314,15 +4237,7 @@ func TestAutoGenAddrContinuesLifetimesAfterRetry(t *testing.T) { const maxRetries = 1 const lifetimeSeconds = 5 - var secretKeyBuf [header.OpaqueIIDSecretKeyMinBytes]byte - secretKey := secretKeyBuf[:] - n, err := rand.Read(secretKey) - if err != nil { - t.Fatalf("rand.Read(_): %s", err) - } - if n != header.OpaqueIIDSecretKeyMinBytes { - t.Fatalf("got rand.Read(_) = (%d, _), want = (%d, _)", n, header.OpaqueIIDSecretKeyMinBytes) - } + secretKey := makeSecretKey(t) prefix, subnet, _ := prefixSubnetAddr(0, linkAddr1) @@ -4331,6 +4246,7 @@ func TestAutoGenAddrContinuesLifetimesAfterRetry(t *testing.T) { autoGenAddrC: make(chan ndpAutoGenAddrEvent, 2), } e := channel.New(0, 1280, linkAddr1) + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ DADConfigs: stack.DADConfigurations{ @@ -4350,6 +4266,7 @@ func TestAutoGenAddrContinuesLifetimesAfterRetry(t *testing.T) { SecretKey: secretKey, }, })}, + Clock: clock, }) opts := stack.NICOptions{Name: nicName} if err := s.CreateNICWithOptions(nicID, e, opts); err != nil { @@ -4380,7 +4297,7 @@ func TestAutoGenAddrContinuesLifetimesAfterRetry(t *testing.T) { expectAutoGenAddrEvent(addr, newAddr) // Simulate a DAD conflict after some time has passed. - time.Sleep(failureTimer) + clock.Advance(failureTimer) rxNDPSolicit(e, addr.Address) expectAutoGenAddrEvent(addr, invalidatedAddr) select { @@ -4395,12 +4312,13 @@ func TestAutoGenAddrContinuesLifetimesAfterRetry(t *testing.T) { // Let the next address resolve. addr.Address = tcpip.Address(header.AppendOpaqueInterfaceIdentifier(addrBytes[:header.IIDOffsetInIPv6Address], subnet, nicName, 1, secretKey)) expectAutoGenAddrEvent(addr, newAddr) + clock.Advance(dadTransmits * retransmitTimer) select { case e := <-ndpDisp.dadC: if diff := checkDADEvent(e, nicID, addr.Address, &stack.DADSucceeded{}); diff != "" { t.Errorf("DAD event mismatch (-want +got):\n%s", diff) } - case <-time.After(dadTransmits*retransmitTimer + defaultAsyncPositiveEventTimeout): + default: t.Fatal("timed out waiting for DAD event") } @@ -4414,6 +4332,7 @@ func TestAutoGenAddrContinuesLifetimesAfterRetry(t *testing.T) { // // We expect either just the invalidation event or the deprecation event // followed by the invalidation event. + clock.Advance(lifetimeSeconds*time.Second - failureTimer - dadTransmits*retransmitTimer) select { case e := <-ndpDisp.autoGenAddrC: if e.eventType == deprecatedAddr { @@ -4426,7 +4345,7 @@ func TestAutoGenAddrContinuesLifetimesAfterRetry(t *testing.T) { if diff := checkAutoGenAddrEvent(e, addr, invalidatedAddr); diff != "" { t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff) } - case <-time.After(defaultAsyncPositiveEventTimeout): + default: t.Fatal("timed out waiting for invalidated auto gen addr event after deprecation") } } else { @@ -4434,7 +4353,7 @@ func TestAutoGenAddrContinuesLifetimesAfterRetry(t *testing.T) { t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff) } } - case <-time.After(lifetimeSeconds*time.Second - failureTimer - dadTransmits*retransmitTimer + defaultAsyncPositiveEventTimeout): + default: t.Fatal("timed out waiting for auto gen addr event") } } @@ -4696,11 +4615,9 @@ func TestNoCleanupNDPStateWhenForwardingEnabled(t *testing.T) { ) ndpDisp := ndpDispatcher{ - routerC: make(chan ndpRouterEvent, 1), - rememberRouter: true, - prefixC: make(chan ndpPrefixEvent, 1), - rememberPrefix: true, - autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1), + offLinkRouteC: make(chan ndpOffLinkRouteEvent, 1), + prefixC: make(chan ndpPrefixEvent, 1), + autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1), } s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ @@ -4743,17 +4660,17 @@ func TestNoCleanupNDPStateWhenForwardingEnabled(t *testing.T) { ), ) select { - case e := <-ndpDisp.routerC: - if diff := checkRouterEvent(e, llAddr3, true /* discovered */); diff != "" { - t.Errorf("router event mismatch (-want +got):\n%s", diff) + case e := <-ndpDisp.offLinkRouteC: + if diff := checkOffLinkRouteEvent(e, llAddr3, true /* discovered */); diff != "" { + t.Errorf("off-link route event mismatch (-want +got):\n%s", diff) } default: - t.Errorf("expected router event for %s on NIC(%d)", llAddr3, nicID) + t.Errorf("expected off-link route event for %s on NIC(%d)", llAddr3, nicID) } select { case e := <-ndpDisp.prefixC: if diff := checkPrefixEvent(e, subnet, true /* discovered */); diff != "" { - t.Errorf("router event mismatch (-want +got):\n%s", diff) + t.Errorf("off-link route event mismatch (-want +got):\n%s", diff) } default: t.Errorf("expected prefix event for %s on NIC(%d)", prefix, nicID) @@ -4775,8 +4692,8 @@ func TestNoCleanupNDPStateWhenForwardingEnabled(t *testing.T) { t.Fatalf("SetForwardingDefaultAndAllNICs(%d, %t): %s", ipv6.ProtocolNumber, forwarding, err) } select { - case e := <-ndpDisp.routerC: - t.Errorf("unexpected router event = %#v", e) + case e := <-ndpDisp.offLinkRouteC: + t.Errorf("unexpected off-link route event = %#v", e) default: } select { @@ -4862,12 +4779,11 @@ func TestCleanupNDPState(t *testing.T) { for _, test := range tests { t.Run(test.name, func(t *testing.T) { ndpDisp := ndpDispatcher{ - routerC: make(chan ndpRouterEvent, maxRouterAndPrefixEvents), - rememberRouter: true, - prefixC: make(chan ndpPrefixEvent, maxRouterAndPrefixEvents), - rememberPrefix: true, - autoGenAddrC: make(chan ndpAutoGenAddrEvent, test.maxAutoGenAddrEvents), + offLinkRouteC: make(chan ndpOffLinkRouteEvent, maxRouterAndPrefixEvents), + prefixC: make(chan ndpPrefixEvent, maxRouterAndPrefixEvents), + autoGenAddrC: make(chan ndpAutoGenAddrEvent, test.maxAutoGenAddrEvents), } + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ AutoGenLinkLocal: true, @@ -4879,16 +4795,17 @@ func TestCleanupNDPState(t *testing.T) { }, NDPDisp: &ndpDisp, })}, + Clock: clock, }) - expectRouterEvent := func() (bool, ndpRouterEvent) { + expectOffLinkRouteEvent := func() (bool, ndpOffLinkRouteEvent) { select { - case e := <-ndpDisp.routerC: + case e := <-ndpDisp.offLinkRouteC: return true, e default: } - return false, ndpRouterEvent{} + return false, ndpOffLinkRouteEvent{} } expectPrefixEvent := func() (bool, ndpPrefixEvent) { @@ -4933,8 +4850,8 @@ func TestCleanupNDPState(t *testing.T) { // multiple addresses. e1.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr3, lifetimeSeconds, prefix1, true, true, lifetimeSeconds, lifetimeSeconds)) - if ok, _ := expectRouterEvent(); !ok { - t.Errorf("expected router event for %s on NIC(%d)", llAddr3, nicID1) + if ok, _ := expectOffLinkRouteEvent(); !ok { + t.Errorf("expected off-link route event for %s on NIC(%d)", llAddr3, nicID1) } if ok, _ := expectPrefixEvent(); !ok { t.Errorf("expected prefix event for %s on NIC(%d)", prefix1, nicID1) @@ -4944,8 +4861,8 @@ func TestCleanupNDPState(t *testing.T) { } e1.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr4, lifetimeSeconds, prefix2, true, true, lifetimeSeconds, lifetimeSeconds)) - if ok, _ := expectRouterEvent(); !ok { - t.Errorf("expected router event for %s on NIC(%d)", llAddr4, nicID1) + if ok, _ := expectOffLinkRouteEvent(); !ok { + t.Errorf("expected off-link route event for %s on NIC(%d)", llAddr4, nicID1) } if ok, _ := expectPrefixEvent(); !ok { t.Errorf("expected prefix event for %s on NIC(%d)", prefix2, nicID1) @@ -4955,8 +4872,8 @@ func TestCleanupNDPState(t *testing.T) { } e2.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr3, lifetimeSeconds, prefix1, true, true, lifetimeSeconds, lifetimeSeconds)) - if ok, _ := expectRouterEvent(); !ok { - t.Errorf("expected router event for %s on NIC(%d)", llAddr3, nicID2) + if ok, _ := expectOffLinkRouteEvent(); !ok { + t.Errorf("expected off-link route event for %s on NIC(%d)", llAddr3, nicID2) } if ok, _ := expectPrefixEvent(); !ok { t.Errorf("expected prefix event for %s on NIC(%d)", prefix1, nicID2) @@ -4966,8 +4883,8 @@ func TestCleanupNDPState(t *testing.T) { } e2.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr4, lifetimeSeconds, prefix2, true, true, lifetimeSeconds, lifetimeSeconds)) - if ok, _ := expectRouterEvent(); !ok { - t.Errorf("expected router event for %s on NIC(%d)", llAddr4, nicID2) + if ok, _ := expectOffLinkRouteEvent(); !ok { + t.Errorf("expected off-link route event for %s on NIC(%d)", llAddr4, nicID2) } if ok, _ := expectPrefixEvent(); !ok { t.Errorf("expected prefix event for %s on NIC(%d)", prefix2, nicID2) @@ -5008,14 +4925,14 @@ func TestCleanupNDPState(t *testing.T) { test.cleanupFn(t, s) // Collect invalidation events after having NDP state cleaned up. - gotRouterEvents := make(map[ndpRouterEvent]int) + gotOffLinkRouteEvents := make(map[ndpOffLinkRouteEvent]int) for i := 0; i < maxRouterAndPrefixEvents; i++ { - ok, e := expectRouterEvent() + ok, e := expectOffLinkRouteEvent() if !ok { - t.Errorf("expected %d router events after becoming a router; got = %d", maxRouterAndPrefixEvents, i) + t.Errorf("expected %d off-link route events after becoming a router; got = %d", maxRouterAndPrefixEvents, i) break } - gotRouterEvents[e]++ + gotOffLinkRouteEvents[e]++ } gotPrefixEvents := make(map[ndpPrefixEvent]int) for i := 0; i < maxRouterAndPrefixEvents; i++ { @@ -5042,14 +4959,14 @@ func TestCleanupNDPState(t *testing.T) { t.FailNow() } - expectedRouterEvents := map[ndpRouterEvent]int{ - {nicID: nicID1, addr: llAddr3, discovered: false}: 1, - {nicID: nicID1, addr: llAddr4, discovered: false}: 1, - {nicID: nicID2, addr: llAddr3, discovered: false}: 1, - {nicID: nicID2, addr: llAddr4, discovered: false}: 1, + expectedOffLinkRouteEvents := map[ndpOffLinkRouteEvent]int{ + {nicID: nicID1, subnet: header.IPv6EmptySubnet, router: llAddr3, updated: false}: 1, + {nicID: nicID1, subnet: header.IPv6EmptySubnet, router: llAddr4, updated: false}: 1, + {nicID: nicID2, subnet: header.IPv6EmptySubnet, router: llAddr3, updated: false}: 1, + {nicID: nicID2, subnet: header.IPv6EmptySubnet, router: llAddr4, updated: false}: 1, } - if diff := cmp.Diff(expectedRouterEvents, gotRouterEvents); diff != "" { - t.Errorf("router events mismatch (-want +got):\n%s", diff) + if diff := cmp.Diff(expectedOffLinkRouteEvents, gotOffLinkRouteEvents); diff != "" { + t.Errorf("off-link route events mismatch (-want +got):\n%s", diff) } expectedPrefixEvents := map[ndpPrefixEvent]int{ {nicID: nicID1, prefix: subnet1, discovered: false}: 1, @@ -5111,10 +5028,10 @@ func TestCleanupNDPState(t *testing.T) { // Should not get any more events (invalidation timers should have been // cancelled when the NDP state was cleaned up). - time.Sleep(lifetimeSeconds*time.Second + defaultAsyncNegativeEventTimeout) + clock.Advance(lifetimeSeconds * time.Second) select { - case <-ndpDisp.routerC: - t.Error("unexpected router event") + case <-ndpDisp.offLinkRouteC: + t.Error("unexpected off-link route event") default: } select { @@ -5139,7 +5056,6 @@ func TestDHCPv6ConfigurationFromNDPDA(t *testing.T) { ndpDisp := ndpDispatcher{ dhcpv6ConfigurationC: make(chan ndpDHCPv6Event, 1), - rememberRouter: true, } e := channel.New(0, 1280, linkAddr1) s := stack.New(stack.Options{ @@ -5241,6 +5157,23 @@ func TestDHCPv6ConfigurationFromNDPDA(t *testing.T) { expectNoDHCPv6Event() } +var _ rand.Source = (*savingRandSource)(nil) + +type savingRandSource struct { + s rand.Source + + lastInt63 int64 +} + +func (d *savingRandSource) Int63() int64 { + i := d.s.Int63() + d.lastInt63 = i + return i +} +func (d *savingRandSource) Seed(seed int64) { + d.s.Seed(seed) +} + // TestRouterSolicitation tests the initial Router Solicitations that are sent // when a NIC newly becomes enabled. func TestRouterSolicitation(t *testing.T) { @@ -5407,6 +5340,9 @@ func TestRouterSolicitation(t *testing.T) { t.Fatalf("unexpectedly got a packet = %#v", p) } } + randSource := savingRandSource{ + s: rand.NewSource(time.Now().UnixNano()), + } s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPConfigs: ipv6.NDPConfigurations{ @@ -5416,8 +5352,10 @@ func TestRouterSolicitation(t *testing.T) { MaxRtrSolicitationDelay: test.maxRtrSolicitDelay, }, })}, - Clock: clock, + Clock: clock, + RandSource: &randSource, }) + if err := s.CreateNIC(nicID, &e); err != nil { t.Fatalf("CreateNIC(%d, _) = %s", nicID, err) } @@ -5430,19 +5368,27 @@ func TestRouterSolicitation(t *testing.T) { // Make sure each RS is sent at the right time. remaining := test.maxRtrSolicit - if remaining > 0 { - waitForPkt(test.effectiveMaxRtrSolicitDelay) + if remaining != 0 { + maxRtrSolicitDelay := test.maxRtrSolicitDelay + if maxRtrSolicitDelay < 0 { + maxRtrSolicitDelay = ipv6.DefaultNDPConfigurations().MaxRtrSolicitationDelay + } + var actualRtrSolicitDelay time.Duration + if maxRtrSolicitDelay != 0 { + actualRtrSolicitDelay = time.Duration(randSource.lastInt63) % maxRtrSolicitDelay + } + waitForPkt(actualRtrSolicitDelay) remaining-- } subTest.afterFirstRS(t, s) - for ; remaining > 0; remaining-- { - if test.effectiveRtrSolicitInt > defaultAsyncPositiveEventTimeout { + for ; remaining != 0; remaining-- { + if test.effectiveRtrSolicitInt != 0 { waitForNothing(test.effectiveRtrSolicitInt - time.Nanosecond) waitForPkt(time.Nanosecond) } else { - waitForPkt(test.effectiveRtrSolicitInt) + waitForPkt(0) } } @@ -5538,12 +5484,11 @@ func TestStopStartSolicitingRouters(t *testing.T) { for _, test := range tests { t.Run(test.name, func(t *testing.T) { e := channel.New(maxRtrSolicitations, 1280, linkAddr1) - waitForPkt := func(timeout time.Duration) { + waitForPkt := func(clock *faketime.ManualClock, timeout time.Duration) { t.Helper() - ctx, cancel := context.WithTimeout(context.Background(), timeout) - defer cancel() - p, ok := e.ReadContext(ctx) + clock.Advance(timeout) + p, ok := e.Read() if !ok { t.Fatal("timed out waiting for packet") } @@ -5557,6 +5502,7 @@ func TestStopStartSolicitingRouters(t *testing.T) { checker.TTL(header.NDPHopLimit), checker.NDPRS()) } + clock := faketime.NewManualClock() s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ NDPConfigs: ipv6.NDPConfigurations{ @@ -5566,6 +5512,7 @@ func TestStopStartSolicitingRouters(t *testing.T) { MaxRtrSolicitationDelay: delay, }, })}, + Clock: clock, }) if err := s.CreateNIC(nicID, e); err != nil { t.Fatalf("CreateNIC(%d, _) = %s", nicID, err) @@ -5573,13 +5520,11 @@ func TestStopStartSolicitingRouters(t *testing.T) { // Stop soliciting routers. test.stopFn(t, s, true /* first */) - ctx, cancel := context.WithTimeout(context.Background(), delay+defaultAsyncNegativeEventTimeout) - defer cancel() - if _, ok := e.ReadContext(ctx); ok { + clock.Advance(delay) + if _, ok := e.Read(); ok { // A single RS may have been sent before solicitations were stopped. - ctx, cancel := context.WithTimeout(context.Background(), interval+defaultAsyncNegativeEventTimeout) - defer cancel() - if _, ok = e.ReadContext(ctx); ok { + clock.Advance(interval) + if _, ok = e.Read(); ok { t.Fatal("should not have sent more than one RS message") } } @@ -5587,9 +5532,8 @@ func TestStopStartSolicitingRouters(t *testing.T) { // Stopping router solicitations after it has already been stopped should // do nothing. test.stopFn(t, s, false /* first */) - ctx, cancel = context.WithTimeout(context.Background(), delay+defaultAsyncNegativeEventTimeout) - defer cancel() - if _, ok := e.ReadContext(ctx); ok { + clock.Advance(delay) + if _, ok := e.Read(); ok { t.Fatal("unexpectedly got a packet after router solicitation has been stopepd") } @@ -5600,21 +5544,19 @@ func TestStopStartSolicitingRouters(t *testing.T) { // Start soliciting routers. test.startFn(t, s) - waitForPkt(delay + defaultAsyncPositiveEventTimeout) - waitForPkt(interval + defaultAsyncPositiveEventTimeout) - waitForPkt(interval + defaultAsyncPositiveEventTimeout) - ctx, cancel = context.WithTimeout(context.Background(), interval+defaultAsyncNegativeEventTimeout) - defer cancel() - if _, ok := e.ReadContext(ctx); ok { + waitForPkt(clock, delay) + waitForPkt(clock, interval) + waitForPkt(clock, interval) + clock.Advance(interval) + if _, ok := e.Read(); ok { t.Fatal("unexpectedly got an extra packet after sending out the expected RSs") } // Starting router solicitations after it has already completed should do // nothing. test.startFn(t, s) - ctx, cancel = context.WithTimeout(context.Background(), delay+defaultAsyncNegativeEventTimeout) - defer cancel() - if _, ok := e.ReadContext(ctx); ok { + clock.Advance(interval) + if _, ok := e.Read(); ok { t.Fatal("unexpectedly got a packet after finishing router solicitations") } }) diff --git a/pkg/tcpip/stack/neighbor_cache.go b/pkg/tcpip/stack/neighbor_cache.go index 509f5ce5c..08857e1a9 100644 --- a/pkg/tcpip/stack/neighbor_cache.go +++ b/pkg/tcpip/stack/neighbor_cache.go @@ -310,7 +310,7 @@ func (n *neighborCache) handleUpperLevelConfirmation(addr tcpip.Address) { func (n *neighborCache) init(nic *nic, r LinkAddressResolver) { *n = neighborCache{ nic: nic, - state: NewNUDState(nic.stack.nudConfigs, nic.stack.randomGenerator), + state: NewNUDState(nic.stack.nudConfigs, nic.stack.clock, nic.stack.randomGenerator), linkRes: r, } n.mu.Lock() diff --git a/pkg/tcpip/stack/neighbor_cache_test.go b/pkg/tcpip/stack/neighbor_cache_test.go index 9821a18d3..7de25fe37 100644 --- a/pkg/tcpip/stack/neighbor_cache_test.go +++ b/pkg/tcpip/stack/neighbor_cache_test.go @@ -15,8 +15,6 @@ package stack import ( - "bytes" - "encoding/binary" "fmt" "math" "math/rand" @@ -48,9 +46,6 @@ const ( // be sent to all nodes. testEntryBroadcastAddr = tcpip.Address("broadcast") - // testEntryLocalAddr is the source address of neighbor probes. - testEntryLocalAddr = tcpip.Address("local_addr") - // testEntryBroadcastLinkAddr is a special link address sent back to // multicast neighbor probes. testEntryBroadcastLinkAddr = tcpip.LinkAddress("mac_broadcast") @@ -95,7 +90,7 @@ func newTestNeighborResolver(nudDisp NUDDispatcher, config NUDConfigurations, cl randomGenerator: rng, }, id: 1, - stats: makeNICStats(), + stats: makeNICStats(tcpip.NICStats{}.FillIn()), }, linkRes) return linkRes } @@ -106,20 +101,24 @@ type testEntryStore struct { entriesMap map[tcpip.Address]NeighborEntry } -func toAddress(i int) tcpip.Address { - buf := new(bytes.Buffer) - binary.Write(buf, binary.BigEndian, uint8(1)) - binary.Write(buf, binary.BigEndian, uint8(0)) - binary.Write(buf, binary.BigEndian, uint16(i)) - return tcpip.Address(buf.String()) +func toAddress(i uint16) tcpip.Address { + return tcpip.Address([]byte{ + 1, + 0, + byte(i >> 8), + byte(i), + }) } -func toLinkAddress(i int) tcpip.LinkAddress { - buf := new(bytes.Buffer) - binary.Write(buf, binary.BigEndian, uint8(1)) - binary.Write(buf, binary.BigEndian, uint8(0)) - binary.Write(buf, binary.BigEndian, uint32(i)) - return tcpip.LinkAddress(buf.String()) +func toLinkAddress(i uint16) tcpip.LinkAddress { + return tcpip.LinkAddress([]byte{ + 1, + 0, + 0, + 0, + byte(i >> 8), + byte(i), + }) } // newTestEntryStore returns a testEntryStore pre-populated with entries. @@ -127,7 +126,7 @@ func newTestEntryStore() *testEntryStore { store := &testEntryStore{ entriesMap: make(map[tcpip.Address]NeighborEntry), } - for i := 0; i < entryStoreSize; i++ { + for i := uint16(0); i < entryStoreSize; i++ { addr := toAddress(i) linkAddr := toLinkAddress(i) @@ -140,15 +139,15 @@ func newTestEntryStore() *testEntryStore { } // size returns the number of entries in the store. -func (s *testEntryStore) size() int { +func (s *testEntryStore) size() uint16 { s.mu.RLock() defer s.mu.RUnlock() - return len(s.entriesMap) + return uint16(len(s.entriesMap)) } // entry returns the entry at index i. Returns an empty entry and false if i is // out of bounds. -func (s *testEntryStore) entry(i int) (NeighborEntry, bool) { +func (s *testEntryStore) entry(i uint16) (NeighborEntry, bool) { return s.entryByAddr(toAddress(i)) } @@ -166,7 +165,7 @@ func (s *testEntryStore) entries() []NeighborEntry { entries := make([]NeighborEntry, 0, len(s.entriesMap)) s.mu.RLock() defer s.mu.RUnlock() - for i := 0; i < entryStoreSize; i++ { + for i := uint16(0); i < entryStoreSize; i++ { addr := toAddress(i) if entry, ok := s.entriesMap[addr]; ok { entries = append(entries, entry) @@ -176,7 +175,7 @@ func (s *testEntryStore) entries() []NeighborEntry { } // set modifies the link addresses of an entry. -func (s *testEntryStore) set(i int, linkAddr tcpip.LinkAddress) { +func (s *testEntryStore) set(i uint16, linkAddr tcpip.LinkAddress) { addr := toAddress(i) s.mu.Lock() defer s.mu.Unlock() @@ -236,13 +235,6 @@ func (*testNeighborResolver) LinkAddressProtocol() tcpip.NetworkProtocolNumber { return 0 } -type entryEvent struct { - nicID tcpip.NICID - address tcpip.Address - linkAddr tcpip.LinkAddress - state NeighborState -} - func TestNeighborCacheGetConfig(t *testing.T) { nudDisp := testNUDDispatcher{} c := DefaultNUDConfigurations() @@ -301,10 +293,10 @@ func addReachableEntryWithRemoved(nudDisp *testNUDDispatcher, clock *faketime.Ma EventType: entryTestRemoved, NICID: 1, Entry: NeighborEntry{ - Addr: removedEntry.Addr, - LinkAddr: removedEntry.LinkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: removedEntry.Addr, + LinkAddr: removedEntry.LinkAddr, + State: Reachable, + UpdatedAt: clock.Now(), }, }) } @@ -313,10 +305,10 @@ func addReachableEntryWithRemoved(nudDisp *testNUDDispatcher, clock *faketime.Ma EventType: entryTestAdded, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: "", - State: Incomplete, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: "", + State: Incomplete, + UpdatedAt: clock.Now(), }, }) @@ -347,10 +339,10 @@ func addReachableEntryWithRemoved(nudDisp *testNUDDispatcher, clock *faketime.Ma EventType: entryTestChanged, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: clock.Now(), }, }, } @@ -419,10 +411,10 @@ func TestNeighborCacheRemoveEntry(t *testing.T) { EventType: entryTestRemoved, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: clock.Now(), }, }, } @@ -461,7 +453,7 @@ func newTestContext(c NUDConfigurations) testContext { } type overflowOptions struct { - startAtEntryIndex int + startAtEntryIndex uint16 wantStaticEntries []NeighborEntry } @@ -500,12 +492,12 @@ func (c *testContext) overflowCache(opts overflowOptions) error { if !ok { return fmt.Errorf("got c.linkRes.entries.entry(%d) = _, false, want = true", i) } - durationReachableNanos := int64(c.linkRes.entries.size()-i-1) * typicalLatency.Nanoseconds() + durationReachableNanos := time.Duration(c.linkRes.entries.size()-i-1) * typicalLatency wantEntry := NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: c.clock.NowNanoseconds() - durationReachableNanos, + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: c.clock.Now().Add(-durationReachableNanos), } wantUnorderedEntries = append(wantUnorderedEntries, wantEntry) } @@ -571,10 +563,10 @@ func TestNeighborCacheRemoveEntryThenOverflow(t *testing.T) { EventType: entryTestRemoved, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: c.clock.Now(), }, }, } @@ -616,10 +608,10 @@ func TestNeighborCacheDuplicateStaticEntryWithSameLinkAddress(t *testing.T) { EventType: entryTestAdded, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: staticLinkAddr, - State: Static, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: staticLinkAddr, + State: Static, + UpdatedAt: c.clock.Now(), }, }, } @@ -663,10 +655,10 @@ func TestNeighborCacheDuplicateStaticEntryWithDifferentLinkAddress(t *testing.T) EventType: entryTestAdded, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: staticLinkAddr, - State: Static, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: staticLinkAddr, + State: Static, + UpdatedAt: c.clock.Now(), }, }, } @@ -689,10 +681,10 @@ func TestNeighborCacheDuplicateStaticEntryWithDifferentLinkAddress(t *testing.T) EventType: entryTestChanged, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: staticLinkAddr, - State: Static, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: staticLinkAddr, + State: Static, + UpdatedAt: c.clock.Now(), }, }, } @@ -733,10 +725,10 @@ func TestNeighborCacheRemoveStaticEntryThenOverflow(t *testing.T) { EventType: entryTestAdded, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: staticLinkAddr, - State: Static, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: staticLinkAddr, + State: Static, + UpdatedAt: c.clock.Now(), }, }, } @@ -758,10 +750,10 @@ func TestNeighborCacheRemoveStaticEntryThenOverflow(t *testing.T) { EventType: entryTestRemoved, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: staticLinkAddr, - State: Static, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: staticLinkAddr, + State: Static, + UpdatedAt: c.clock.Now(), }, }, } @@ -814,20 +806,20 @@ func TestNeighborCacheOverwriteWithStaticEntryThenOverflow(t *testing.T) { EventType: entryTestRemoved, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: c.clock.Now(), }, }, { EventType: entryTestAdded, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: staticLinkAddr, - State: Static, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: staticLinkAddr, + State: Static, + UpdatedAt: c.clock.Now(), }, }, } @@ -844,10 +836,10 @@ func TestNeighborCacheOverwriteWithStaticEntryThenOverflow(t *testing.T) { startAtEntryIndex: 1, wantStaticEntries: []NeighborEntry{ { - Addr: entry.Addr, - LinkAddr: staticLinkAddr, - State: Static, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: staticLinkAddr, + State: Static, + UpdatedAt: c.clock.Now(), }, }, } @@ -875,10 +867,10 @@ func TestNeighborCacheAddStaticEntryThenOverflow(t *testing.T) { t.Errorf("unexpected error from c.linkRes.neigh.entry(%s, \"\", nil): %s", entry.Addr, err) } want := NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Static, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Static, + UpdatedAt: c.clock.Now(), } if diff := cmp.Diff(want, e); diff != "" { t.Errorf("c.linkRes.neigh.entry(%s, \"\", nil) mismatch (-want, +got):\n%s", entry.Addr, diff) @@ -890,10 +882,10 @@ func TestNeighborCacheAddStaticEntryThenOverflow(t *testing.T) { EventType: entryTestAdded, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Static, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Static, + UpdatedAt: c.clock.Now(), }, }, } @@ -910,10 +902,10 @@ func TestNeighborCacheAddStaticEntryThenOverflow(t *testing.T) { startAtEntryIndex: 1, wantStaticEntries: []NeighborEntry{ { - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Static, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Static, + UpdatedAt: c.clock.Now(), }, }, } @@ -947,10 +939,10 @@ func TestNeighborCacheClear(t *testing.T) { EventType: entryTestAdded, NICID: 1, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Static, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Static, + UpdatedAt: clock.Now(), }, }, } @@ -973,20 +965,20 @@ func TestNeighborCacheClear(t *testing.T) { EventType: entryTestRemoved, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: clock.Now(), }, }, { EventType: entryTestRemoved, NICID: 1, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Static, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Static, + UpdatedAt: clock.Now(), }, }, } @@ -1027,10 +1019,10 @@ func TestNeighborCacheClearThenOverflow(t *testing.T) { EventType: entryTestRemoved, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: c.clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: c.clock.Now(), }, }, } @@ -1062,13 +1054,13 @@ func TestNeighborCacheKeepFrequentlyUsed(t *testing.T) { clock := faketime.NewManualClock() linkRes := newTestNeighborResolver(&nudDisp, config, clock) - startedAt := clock.NowNanoseconds() + startedAt := clock.Now() // The following logic is very similar to overflowCache, but // periodically refreshes the frequently used entry. // Fill the neighbor cache to capacity - for i := 0; i < neighborCacheSize; i++ { + for i := uint16(0); i < neighborCacheSize; i++ { entry, ok := linkRes.entries.entry(i) if !ok { t.Fatalf("got linkRes.entries.entry(%d) = _, false, want = true", i) @@ -1084,7 +1076,7 @@ func TestNeighborCacheKeepFrequentlyUsed(t *testing.T) { } // Keep adding more entries - for i := neighborCacheSize; i < linkRes.entries.size(); i++ { + for i := uint16(neighborCacheSize); i < linkRes.entries.size(); i++ { // Periodically refresh the frequently used entry if i%(neighborCacheSize/2) == 0 { if _, _, err := linkRes.neigh.entry(frequentlyUsedEntry.Addr, "", nil); err != nil { @@ -1118,7 +1110,7 @@ func TestNeighborCacheKeepFrequentlyUsed(t *testing.T) { State: Reachable, // Can be inferred since the frequently used entry is the first to // be created and transitioned to Reachable. - UpdatedAtNanos: startedAt + typicalLatency.Nanoseconds(), + UpdatedAt: startedAt.Add(typicalLatency), }, } @@ -1127,12 +1119,12 @@ func TestNeighborCacheKeepFrequentlyUsed(t *testing.T) { if !ok { t.Fatalf("got linkRes.entries.entry(%d) = _, false, want = true", i) } - durationReachableNanos := int64(linkRes.entries.size()-i-1) * typicalLatency.Nanoseconds() + durationReachableNanos := time.Duration(linkRes.entries.size()-i-1) * typicalLatency wantUnsortedEntries = append(wantUnsortedEntries, NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds() - durationReachableNanos, + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: clock.Now().Add(-durationReachableNanos), }) } @@ -1190,12 +1182,12 @@ func TestNeighborCacheConcurrent(t *testing.T) { if !ok { t.Errorf("got linkRes.entries.entry(%d) = _, false, want = true", i) } - durationReachableNanos := int64(linkRes.entries.size()-i-1) * typicalLatency.Nanoseconds() + durationReachableNanos := time.Duration(linkRes.entries.size()-i-1) * typicalLatency wantUnsortedEntries = append(wantUnsortedEntries, NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds() - durationReachableNanos, + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: clock.Now().Add(-durationReachableNanos), }) } @@ -1244,10 +1236,10 @@ func TestNeighborCacheReplace(t *testing.T) { t.Fatalf("linkRes.neigh.entry(%s, '', nil): %s", entry.Addr, err) } want := NeighborEntry{ - Addr: entry.Addr, - LinkAddr: updatedLinkAddr, - State: Delay, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: updatedLinkAddr, + State: Delay, + UpdatedAt: clock.Now(), } if diff := cmp.Diff(want, e); diff != "" { t.Errorf("linkRes.neigh.entry(%s, '', nil) mismatch (-want, +got):\n%s", entry.Addr, diff) @@ -1263,10 +1255,10 @@ func TestNeighborCacheReplace(t *testing.T) { t.Errorf("unexpected error from linkRes.neigh.entry(%s, '', nil): %s", entry.Addr, err) } want := NeighborEntry{ - Addr: entry.Addr, - LinkAddr: updatedLinkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: updatedLinkAddr, + State: Reachable, + UpdatedAt: clock.Now(), } if diff := cmp.Diff(want, e); diff != "" { t.Errorf("linkRes.neigh.entry(%s, '', nil) mismatch (-want, +got):\n%s", entry.Addr, diff) @@ -1301,10 +1293,10 @@ func TestNeighborCacheResolutionFailed(t *testing.T) { t.Fatalf("unexpected error from linkRes.neigh.entry(%s, '', nil): %s", entry.Addr, err) } want := NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: clock.Now(), } if diff := cmp.Diff(want, got); diff != "" { t.Errorf("linkRes.neigh.entry(%s, '', nil) mismatch (-want, +got):\n%s", entry.Addr, diff) @@ -1405,10 +1397,10 @@ func TestNeighborCacheRetryResolution(t *testing.T) { EventType: entryTestAdded, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: "", - State: Incomplete, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: "", + State: Incomplete, + UpdatedAt: clock.Now(), }, }, } @@ -1436,10 +1428,10 @@ func TestNeighborCacheRetryResolution(t *testing.T) { EventType: entryTestChanged, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: "", - State: Unreachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: "", + State: Unreachable, + UpdatedAt: clock.Now(), }, }, } @@ -1455,10 +1447,10 @@ func TestNeighborCacheRetryResolution(t *testing.T) { { wantEntries := []NeighborEntry{ { - Addr: entry.Addr, - LinkAddr: "", - State: Unreachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: "", + State: Unreachable, + UpdatedAt: clock.Now(), }, } if diff := cmp.Diff(linkRes.neigh.entries(), wantEntries, unorderedEntriesDiffOpts()...); diff != "" { @@ -1488,10 +1480,10 @@ func TestNeighborCacheRetryResolution(t *testing.T) { EventType: entryTestChanged, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: "", - State: Incomplete, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: "", + State: Incomplete, + UpdatedAt: clock.Now(), }, }, } @@ -1518,10 +1510,10 @@ func TestNeighborCacheRetryResolution(t *testing.T) { EventType: entryTestChanged, NICID: 1, Entry: NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: clock.Now(), }, }, } @@ -1541,10 +1533,10 @@ func TestNeighborCacheRetryResolution(t *testing.T) { } wantEntry := NeighborEntry{ - Addr: entry.Addr, - LinkAddr: entry.LinkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entry.Addr, + LinkAddr: entry.LinkAddr, + State: Reachable, + UpdatedAt: clock.Now(), } if diff := cmp.Diff(gotEntry, wantEntry); diff != "" { t.Fatalf("neighbor entry mismatch (-got, +want):\n%s", diff) @@ -1561,9 +1553,9 @@ func BenchmarkCacheClear(b *testing.B) { linkRes.delay = 0 // Clear for every possible size of the cache - for cacheSize := 0; cacheSize < neighborCacheSize; cacheSize++ { + for cacheSize := uint16(0); cacheSize < neighborCacheSize; cacheSize++ { // Fill the neighbor cache to capacity. - for i := 0; i < cacheSize; i++ { + for i := uint16(0); i < cacheSize; i++ { entry, ok := linkRes.entries.entry(i) if !ok { b.Fatalf("got linkRes.entries.entry(%d) = _, false, want = true", i) diff --git a/pkg/tcpip/stack/neighbor_entry.go b/pkg/tcpip/stack/neighbor_entry.go index 6d95e1664..0a59eecdd 100644 --- a/pkg/tcpip/stack/neighbor_entry.go +++ b/pkg/tcpip/stack/neighbor_entry.go @@ -31,10 +31,10 @@ const ( // NeighborEntry describes a neighboring device in the local network. type NeighborEntry struct { - Addr tcpip.Address - LinkAddr tcpip.LinkAddress - State NeighborState - UpdatedAtNanos int64 + Addr tcpip.Address + LinkAddr tcpip.LinkAddress + State NeighborState + UpdatedAt time.Time } // NeighborState defines the state of a NeighborEntry within the Neighbor @@ -138,10 +138,10 @@ func newNeighborEntry(cache *neighborCache, remoteAddr tcpip.Address, nudState * // calling `setStateLocked`. func newStaticNeighborEntry(cache *neighborCache, addr tcpip.Address, linkAddr tcpip.LinkAddress, state *NUDState) *neighborEntry { entry := NeighborEntry{ - Addr: addr, - LinkAddr: linkAddr, - State: Static, - UpdatedAtNanos: cache.nic.stack.clock.NowNanoseconds(), + Addr: addr, + LinkAddr: linkAddr, + State: Static, + UpdatedAt: cache.nic.stack.clock.Now(), } n := &neighborEntry{ cache: cache, @@ -166,14 +166,20 @@ func (e *neighborEntry) notifyCompletionLocked(err tcpip.Error) { if ch := e.mu.done; ch != nil { close(ch) e.mu.done = nil - // Dequeue the pending packets in a new goroutine to not hold up the current + // Dequeue the pending packets asynchronously to not hold up the current // goroutine as writing packets may be a costly operation. // // At the time of writing, when writing packets, a neighbor's link address // is resolved (which ends up obtaining the entry's lock) while holding the - // link resolution queue's lock. Dequeuing packets in a new goroutine avoids - // a lock ordering violation. - go e.cache.nic.linkResQueue.dequeue(ch, e.mu.neigh.LinkAddr, err) + // link resolution queue's lock. Dequeuing packets asynchronously avoids a + // lock ordering violation. + // + // NB: this is equivalent to spawning a goroutine directly using the go + // keyword but allows tests that use manual clocks to deterministically + // wait for this work to complete. + e.cache.nic.stack.clock.AfterFunc(0, func() { + e.cache.nic.linkResQueue.dequeue(ch, e.mu.neigh.LinkAddr, err) + }) } } @@ -224,7 +230,7 @@ func (e *neighborEntry) cancelTimerLocked() { // // Precondition: e.mu MUST be locked. func (e *neighborEntry) removeLocked() { - e.mu.neigh.UpdatedAtNanos = e.cache.nic.stack.clock.NowNanoseconds() + e.mu.neigh.UpdatedAt = e.cache.nic.stack.clock.Now() e.dispatchRemoveEventLocked() e.cancelTimerLocked() // TODO(https://gvisor.dev/issues/5583): test the case where this function is @@ -246,7 +252,7 @@ func (e *neighborEntry) setStateLocked(next NeighborState) { prev := e.mu.neigh.State e.mu.neigh.State = next - e.mu.neigh.UpdatedAtNanos = e.cache.nic.stack.clock.NowNanoseconds() + e.mu.neigh.UpdatedAt = e.cache.nic.stack.clock.Now() config := e.nudState.Config() switch next { @@ -307,7 +313,7 @@ func (e *neighborEntry) setStateLocked(next NeighborState) { // a shared lock. e.mu.timer = timer{ done: &done, - timer: e.cache.nic.stack.Clock().AfterFunc(0, func() { + timer: e.cache.nic.stack.Clock().AfterFunc(immediateDuration, func() { var err tcpip.Error = &tcpip.ErrTimeout{} if remaining != 0 { err = e.cache.linkRes.LinkAddressRequest(addr, "" /* localAddr */, linkAddr) @@ -354,14 +360,14 @@ func (e *neighborEntry) handlePacketQueuedLocked(localAddr tcpip.Address) { case Unknown, Unreachable: prev := e.mu.neigh.State e.mu.neigh.State = Incomplete - e.mu.neigh.UpdatedAtNanos = e.cache.nic.stack.clock.NowNanoseconds() + e.mu.neigh.UpdatedAt = e.cache.nic.stack.clock.Now() switch prev { case Unknown: e.dispatchAddEventLocked() case Unreachable: e.dispatchChangeEventLocked() - e.cache.nic.stats.Neighbor.UnreachableEntryLookups.Increment() + e.cache.nic.stats.neighbor.unreachableEntryLookups.Increment() } config := e.nudState.Config() @@ -378,7 +384,7 @@ func (e *neighborEntry) handlePacketQueuedLocked(localAddr tcpip.Address) { // a shared lock. e.mu.timer = timer{ done: &done, - timer: e.cache.nic.stack.Clock().AfterFunc(0, func() { + timer: e.cache.nic.stack.Clock().AfterFunc(immediateDuration, func() { var err tcpip.Error = &tcpip.ErrTimeout{} if remaining != 0 { // As per RFC 4861 section 7.2.2: diff --git a/pkg/tcpip/stack/neighbor_entry_test.go b/pkg/tcpip/stack/neighbor_entry_test.go index 1d39ee73d..59d86d6d4 100644 --- a/pkg/tcpip/stack/neighbor_entry_test.go +++ b/pkg/tcpip/stack/neighbor_entry_test.go @@ -36,11 +36,6 @@ const ( entryTestLinkAddr1 = tcpip.LinkAddress("\x0a\x00\x00\x00\x00\x01") entryTestLinkAddr2 = tcpip.LinkAddress("\x0a\x00\x00\x00\x00\x02") - - // entryTestNetDefaultMTU is the MTU, in bytes, used throughout the tests, - // except where another value is explicitly used. It is chosen to match the - // MTU of loopback interfaces on Linux systems. - entryTestNetDefaultMTU = 65536 ) var ( @@ -196,13 +191,13 @@ func (r *entryTestLinkResolver) LinkAddressRequest(targetAddr, localAddr tcpip.A // ResolveStaticAddress attempts to resolve address without sending requests. // It either resolves the name immediately or returns the empty LinkAddress. -func (r *entryTestLinkResolver) ResolveStaticAddress(addr tcpip.Address) (tcpip.LinkAddress, bool) { +func (*entryTestLinkResolver) ResolveStaticAddress(tcpip.Address) (tcpip.LinkAddress, bool) { return "", false } // LinkAddressProtocol returns the network protocol of the addresses this // resolver can resolve. -func (r *entryTestLinkResolver) LinkAddressProtocol() tcpip.NetworkProtocolNumber { +func (*entryTestLinkResolver) LinkAddressProtocol() tcpip.NetworkProtocolNumber { return entryTestNetNumber } @@ -219,7 +214,7 @@ func entryTestSetup(c NUDConfigurations) (*neighborEntry, *testNUDDispatcher, *e nudConfigs: c, randomGenerator: rand.New(rand.NewSource(time.Now().UnixNano())), }, - stats: makeNICStats(), + stats: makeNICStats(tcpip.NICStats{}.FillIn()), } netEP := (&testIPv6Protocol{}).NewEndpoint(&nic, nil) nic.networkEndpoints = map[tcpip.NetworkProtocolNumber]NetworkEndpoint{ @@ -354,10 +349,10 @@ func unknownToIncomplete(e *neighborEntry, nudDisp *testNUDDispatcher, linkRes * EventType: entryTestAdded, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: tcpip.LinkAddress(""), - State: Incomplete, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: tcpip.LinkAddress(""), + State: Incomplete, + UpdatedAt: clock.Now(), }, }, } @@ -415,10 +410,10 @@ func unknownToStale(e *neighborEntry, nudDisp *testNUDDispatcher, linkRes *entry EventType: entryTestAdded, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -446,7 +441,7 @@ func TestEntryIncompleteToIncompleteDoesNotChangeUpdatedAt(t *testing.T) { // UpdatedAt should remain the same during address resolution. e.mu.Lock() - startedAt := e.mu.neigh.UpdatedAtNanos + startedAt := e.mu.neigh.UpdatedAt e.mu.Unlock() // Wait for the rest of the reachability probe transmissions, signifying @@ -470,7 +465,7 @@ func TestEntryIncompleteToIncompleteDoesNotChangeUpdatedAt(t *testing.T) { } e.mu.Lock() - if got, want := e.mu.neigh.UpdatedAtNanos, startedAt; got != want { + if got, want := e.mu.neigh.UpdatedAt, startedAt; got != want { t.Errorf("got e.mu.neigh.UpdatedAt = %q, want = %q", got, want) } e.mu.Unlock() @@ -485,10 +480,10 @@ func TestEntryIncompleteToIncompleteDoesNotChangeUpdatedAt(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: tcpip.LinkAddress(""), - State: Unreachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: tcpip.LinkAddress(""), + State: Unreachable, + UpdatedAt: clock.Now(), }, }, } @@ -547,10 +542,10 @@ func incompleteToReachableWithFlags(e *neighborEntry, nudDisp *testNUDDispatcher EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Reachable, + UpdatedAt: clock.Now(), }, }, } @@ -644,10 +639,10 @@ func TestEntryIncompleteToStaleWhenUnsolicitedConfirmation(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -678,10 +673,10 @@ func TestEntryIncompleteToStaleWhenProbe(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -757,10 +752,10 @@ func incompleteToUnreachable(c NUDConfigurations, e *neighborEntry, nudDisp *tes EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: tcpip.LinkAddress(""), - State: Unreachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: tcpip.LinkAddress(""), + State: Unreachable, + UpdatedAt: clock.Now(), }, }, } @@ -943,10 +938,10 @@ func reachableToStale(c NUDConfigurations, e *neighborEntry, nudDisp *testNUDDis EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -998,10 +993,10 @@ func TestEntryReachableToStaleWhenProbeWithDifferentAddress(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr2, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr2, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -1050,10 +1045,10 @@ func TestEntryReachableToStaleWhenConfirmationWithDifferentAddress(t *testing.T) EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -1102,10 +1097,10 @@ func TestEntryReachableToStaleWhenConfirmationWithDifferentAddressAndOverride(t EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr2, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr2, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -1191,10 +1186,10 @@ func TestEntryStaleToReachableWhenSolicitedOverrideConfirmation(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr2, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr2, + State: Reachable, + UpdatedAt: clock.Now(), }, }, } @@ -1243,10 +1238,10 @@ func TestEntryStaleToReachableWhenSolicitedConfirmationWithoutAddress(t *testing EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Reachable, + UpdatedAt: clock.Now(), }, }, } @@ -1284,10 +1279,10 @@ func TestEntryStaleToStaleWhenOverrideConfirmation(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr2, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr2, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -1332,10 +1327,10 @@ func TestEntryStaleToStaleWhenProbeUpdateAddress(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr2, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr2, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -1391,10 +1386,10 @@ func staleToDelay(e *neighborEntry, nudDisp *testNUDDispatcher, linkRes *entryTe EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Delay, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Delay, + UpdatedAt: clock.Now(), }, }, } @@ -1443,10 +1438,10 @@ func TestEntryDelayToReachableWhenUpperLevelConfirmation(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Reachable, + UpdatedAt: clock.Now(), }, }, } @@ -1498,10 +1493,10 @@ func TestEntryDelayToReachableWhenSolicitedOverrideConfirmation(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr2, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr2, + State: Reachable, + UpdatedAt: clock.Now(), }, }, } @@ -1553,10 +1548,10 @@ func TestEntryDelayToReachableWhenSolicitedConfirmationWithoutAddress(t *testing EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Reachable, + UpdatedAt: clock.Now(), }, }, } @@ -1645,10 +1640,10 @@ func TestEntryDelayToStaleWhenProbeWithDifferentAddress(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr2, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr2, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -1697,10 +1692,10 @@ func TestEntryDelayToStaleWhenConfirmationWithDifferentAddress(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr2, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr2, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -1770,10 +1765,10 @@ func delayToProbe(c NUDConfigurations, e *neighborEntry, nudDisp *testNUDDispatc EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Probe, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Probe, + UpdatedAt: clock.Now(), }, }, } @@ -1827,10 +1822,10 @@ func TestEntryProbeToStaleWhenProbeWithDifferentAddress(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr2, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr2, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -1882,10 +1877,10 @@ func TestEntryProbeToStaleWhenConfirmationWithDifferentAddress(t *testing.T) { EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr2, - State: Stale, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr2, + State: Stale, + UpdatedAt: clock.Now(), }, }, } @@ -2003,10 +1998,10 @@ func probeToReachableWithFlags(e *neighborEntry, nudDisp *testNUDDispatcher, lin EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: linkAddr, - State: Reachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: linkAddr, + State: Reachable, + UpdatedAt: clock.Now(), }, }, } @@ -2155,10 +2150,10 @@ func probeToUnreachable(c NUDConfigurations, e *neighborEntry, nudDisp *testNUDD EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: entryTestLinkAddr1, - State: Unreachable, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: entryTestLinkAddr1, + State: Unreachable, + UpdatedAt: clock.Now(), }, }, } @@ -2227,10 +2222,10 @@ func unreachableToIncomplete(e *neighborEntry, nudDisp *testNUDDispatcher, linkR EventType: entryTestChanged, NICID: entryTestNICID, Entry: NeighborEntry{ - Addr: entryTestAddr1, - LinkAddr: tcpip.LinkAddress(""), - State: Incomplete, - UpdatedAtNanos: clock.NowNanoseconds(), + Addr: entryTestAddr1, + LinkAddr: tcpip.LinkAddress(""), + State: Incomplete, + UpdatedAt: clock.Now(), }, }, } diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go index 8d615500f..9cac6bbd1 100644 --- a/pkg/tcpip/stack/nic.go +++ b/pkg/tcpip/stack/nic.go @@ -51,7 +51,7 @@ type nic struct { name string context NICContext - stats NICStats + stats sharedStats // The network endpoints themselves may be modified by calling the interface's // methods, but the map reference and entries must be constant. @@ -78,26 +78,13 @@ type nic struct { } } -// NICStats hold statistics for a NIC. -type NICStats struct { - Tx DirectionStats - Rx DirectionStats - - DisabledRx DirectionStats - - Neighbor NeighborStats -} - -func makeNICStats() NICStats { - var s NICStats - tcpip.InitStatCounters(reflect.ValueOf(&s).Elem()) - return s -} - -// DirectionStats includes packet and byte counts. -type DirectionStats struct { - Packets *tcpip.StatCounter - Bytes *tcpip.StatCounter +// makeNICStats initializes the NIC statistics and associates them to the global +// NIC statistics. +func makeNICStats(global tcpip.NICStats) sharedStats { + var stats sharedStats + tcpip.InitStatCounters(reflect.ValueOf(&stats.local).Elem()) + stats.init(&stats.local, &global) + return stats } type packetEndpointList struct { @@ -150,7 +137,7 @@ func newNIC(stack *Stack, id tcpip.NICID, name string, ep LinkEndpoint, ctx NICC id: id, name: name, context: ctx, - stats: makeNICStats(), + stats: makeNICStats(stack.Stats().NICs), networkEndpoints: make(map[tcpip.NetworkProtocolNumber]NetworkEndpoint), linkAddrResolvers: make(map[tcpip.NetworkProtocolNumber]*linkResolver), duplicateAddressDetectors: make(map[tcpip.NetworkProtocolNumber]DuplicateAddressDetector), @@ -382,8 +369,8 @@ func (n *nic) writePacket(r RouteInfo, protocol tcpip.NetworkProtocolNumber, pkt return err } - n.stats.Tx.Packets.Increment() - n.stats.Tx.Bytes.IncrementBy(uint64(numBytes)) + n.stats.tx.packets.Increment() + n.stats.tx.bytes.IncrementBy(uint64(numBytes)) return nil } @@ -399,13 +386,13 @@ func (n *nic) writePackets(r RouteInfo, protocol tcpip.NetworkProtocolNumber, pk } writtenPackets, err := n.LinkEndpoint.WritePackets(r, pkts, protocol) - n.stats.Tx.Packets.IncrementBy(uint64(writtenPackets)) + n.stats.tx.packets.IncrementBy(uint64(writtenPackets)) writtenBytes := 0 for i, pb := 0, pkts.Front(); i < writtenPackets && pb != nil; i, pb = i+1, pb.Next() { writtenBytes += pb.Size() } - n.stats.Tx.Bytes.IncrementBy(uint64(writtenBytes)) + n.stats.tx.bytes.IncrementBy(uint64(writtenBytes)) return writtenPackets, err } @@ -718,18 +705,18 @@ func (n *nic) DeliverNetworkPacket(remote, local tcpip.LinkAddress, protocol tcp if !enabled { n.mu.RUnlock() - n.stats.DisabledRx.Packets.Increment() - n.stats.DisabledRx.Bytes.IncrementBy(uint64(pkt.Data().Size())) + n.stats.disabledRx.packets.Increment() + n.stats.disabledRx.bytes.IncrementBy(uint64(pkt.Data().Size())) return } - n.stats.Rx.Packets.Increment() - n.stats.Rx.Bytes.IncrementBy(uint64(pkt.Data().Size())) + n.stats.rx.packets.Increment() + n.stats.rx.bytes.IncrementBy(uint64(pkt.Data().Size())) networkEndpoint, ok := n.networkEndpoints[protocol] if !ok { n.mu.RUnlock() - n.stack.stats.UnknownProtocolRcvdPackets.Increment() + n.stats.unknownL3ProtocolRcvdPackets.Increment() return } @@ -786,7 +773,7 @@ func (n *nic) DeliverOutboundPacket(remote, local tcpip.LinkAddress, protocol tc func (n *nic) DeliverTransportPacket(protocol tcpip.TransportProtocolNumber, pkt *PacketBuffer) TransportPacketDisposition { state, ok := n.stack.transportProtocols[protocol] if !ok { - n.stack.stats.UnknownProtocolRcvdPackets.Increment() + n.stats.unknownL4ProtocolRcvdPackets.Increment() return TransportPacketProtocolUnreachable } @@ -800,27 +787,26 @@ func (n *nic) DeliverTransportPacket(protocol tcpip.TransportProtocolNumber, pkt // TransportHeader is empty only when pkt is an ICMP packet or was reassembled // from fragments. if pkt.TransportHeader().View().IsEmpty() { - // TODO(gvisor.dev/issue/170): ICMP packets don't have their TransportHeader - // fields set yet, parse it here. See icmp/protocol.go:protocol.Parse for a - // full explanation. + // ICMP packets don't have their TransportHeader fields set yet, parse it + // here. See icmp/protocol.go:protocol.Parse for a full explanation. if protocol == header.ICMPv4ProtocolNumber || protocol == header.ICMPv6ProtocolNumber { // ICMP packets may be longer, but until icmp.Parse is implemented, here // we parse it using the minimum size. if _, ok := pkt.TransportHeader().Consume(transProto.MinimumPacketSize()); !ok { - n.stack.stats.MalformedRcvdPackets.Increment() + n.stats.malformedL4RcvdPackets.Increment() // We consider a malformed transport packet handled because there is // nothing the caller can do. return TransportPacketHandled } } else if !transProto.Parse(pkt) { - n.stack.stats.MalformedRcvdPackets.Increment() + n.stats.malformedL4RcvdPackets.Increment() return TransportPacketHandled } } srcPort, dstPort, err := transProto.ParsePorts(pkt.TransportHeader().View()) if err != nil { - n.stack.stats.MalformedRcvdPackets.Increment() + n.stats.malformedL4RcvdPackets.Increment() return TransportPacketHandled } @@ -852,7 +838,7 @@ func (n *nic) DeliverTransportPacket(protocol tcpip.TransportProtocolNumber, pkt // If it doesn't handle it then we should do so. switch res := transProto.HandleUnknownDestinationPacket(id, pkt); res { case UnknownDestinationPacketMalformed: - n.stack.stats.MalformedRcvdPackets.Increment() + n.stats.malformedL4RcvdPackets.Increment() return TransportPacketHandled case UnknownDestinationPacketUnhandled: return TransportPacketDestinationPortUnreachable @@ -1000,3 +986,32 @@ func (n *nic) checkDuplicateAddress(protocol tcpip.NetworkProtocolNumber, addr t return d.CheckDuplicateAddress(addr, h), nil } + +func (n *nic) setForwarding(protocol tcpip.NetworkProtocolNumber, enable bool) tcpip.Error { + ep := n.getNetworkEndpoint(protocol) + if ep == nil { + return &tcpip.ErrUnknownProtocol{} + } + + forwardingEP, ok := ep.(ForwardingNetworkEndpoint) + if !ok { + return &tcpip.ErrNotSupported{} + } + + forwardingEP.SetForwarding(enable) + return nil +} + +func (n *nic) forwarding(protocol tcpip.NetworkProtocolNumber) (bool, tcpip.Error) { + ep := n.getNetworkEndpoint(protocol) + if ep == nil { + return false, &tcpip.ErrUnknownProtocol{} + } + + forwardingEP, ok := ep.(ForwardingNetworkEndpoint) + if !ok { + return false, &tcpip.ErrNotSupported{} + } + + return forwardingEP.Forwarding(), nil +} diff --git a/pkg/tcpip/stack/nic_stats.go b/pkg/tcpip/stack/nic_stats.go new file mode 100644 index 000000000..1773d5e8d --- /dev/null +++ b/pkg/tcpip/stack/nic_stats.go @@ -0,0 +1,74 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package stack + +import ( + "gvisor.dev/gvisor/pkg/tcpip" +) + +type sharedStats struct { + local tcpip.NICStats + multiCounterNICStats +} + +// LINT.IfChange(multiCounterNICPacketStats) + +type multiCounterNICPacketStats struct { + packets tcpip.MultiCounterStat + bytes tcpip.MultiCounterStat +} + +func (m *multiCounterNICPacketStats) init(a, b *tcpip.NICPacketStats) { + m.packets.Init(a.Packets, b.Packets) + m.bytes.Init(a.Bytes, b.Bytes) +} + +// LINT.ThenChange(../../tcpip.go:NICPacketStats) + +// LINT.IfChange(multiCounterNICNeighborStats) + +type multiCounterNICNeighborStats struct { + unreachableEntryLookups tcpip.MultiCounterStat +} + +func (m *multiCounterNICNeighborStats) init(a, b *tcpip.NICNeighborStats) { + m.unreachableEntryLookups.Init(a.UnreachableEntryLookups, b.UnreachableEntryLookups) +} + +// LINT.ThenChange(../../tcpip.go:NICNeighborStats) + +// LINT.IfChange(multiCounterNICStats) + +type multiCounterNICStats struct { + unknownL3ProtocolRcvdPackets tcpip.MultiCounterStat + unknownL4ProtocolRcvdPackets tcpip.MultiCounterStat + malformedL4RcvdPackets tcpip.MultiCounterStat + tx multiCounterNICPacketStats + rx multiCounterNICPacketStats + disabledRx multiCounterNICPacketStats + neighbor multiCounterNICNeighborStats +} + +func (m *multiCounterNICStats) init(a, b *tcpip.NICStats) { + m.unknownL3ProtocolRcvdPackets.Init(a.UnknownL3ProtocolRcvdPackets, b.UnknownL3ProtocolRcvdPackets) + m.unknownL4ProtocolRcvdPackets.Init(a.UnknownL4ProtocolRcvdPackets, b.UnknownL4ProtocolRcvdPackets) + m.malformedL4RcvdPackets.Init(a.MalformedL4RcvdPackets, b.MalformedL4RcvdPackets) + m.tx.init(&a.Tx, &b.Tx) + m.rx.init(&a.Rx, &b.Rx) + m.disabledRx.init(&a.DisabledRx, &b.DisabledRx) + m.neighbor.init(&a.Neighbor, &b.Neighbor) +} + +// LINT.ThenChange(../../tcpip.go:NICStats) diff --git a/pkg/tcpip/stack/nic_test.go b/pkg/tcpip/stack/nic_test.go index 8a3005295..5cb342f78 100644 --- a/pkg/tcpip/stack/nic_test.go +++ b/pkg/tcpip/stack/nic_test.go @@ -15,11 +15,13 @@ package stack import ( + "reflect" "testing" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/pkg/tcpip/testutil" ) var _ AddressableEndpoint = (*testIPv6Endpoint)(nil) @@ -171,19 +173,19 @@ func TestDisabledRxStatsWhenNICDisabled(t *testing.T) { // When the NIC is disabled, the only field that matters is the stats field. // This test is limited to stats counter checks. nic := nic{ - stats: makeNICStats(), + stats: makeNICStats(tcpip.NICStats{}.FillIn()), } - if got := nic.stats.DisabledRx.Packets.Value(); got != 0 { + if got := nic.stats.local.DisabledRx.Packets.Value(); got != 0 { t.Errorf("got DisabledRx.Packets = %d, want = 0", got) } - if got := nic.stats.DisabledRx.Bytes.Value(); got != 0 { + if got := nic.stats.local.DisabledRx.Bytes.Value(); got != 0 { t.Errorf("got DisabledRx.Bytes = %d, want = 0", got) } - if got := nic.stats.Rx.Packets.Value(); got != 0 { + if got := nic.stats.local.Rx.Packets.Value(); got != 0 { t.Errorf("got Rx.Packets = %d, want = 0", got) } - if got := nic.stats.Rx.Bytes.Value(); got != 0 { + if got := nic.stats.local.Rx.Bytes.Value(); got != 0 { t.Errorf("got Rx.Bytes = %d, want = 0", got) } @@ -195,16 +197,28 @@ func TestDisabledRxStatsWhenNICDisabled(t *testing.T) { Data: buffer.View([]byte{1, 2, 3, 4}).ToVectorisedView(), })) - if got := nic.stats.DisabledRx.Packets.Value(); got != 1 { + if got := nic.stats.local.DisabledRx.Packets.Value(); got != 1 { t.Errorf("got DisabledRx.Packets = %d, want = 1", got) } - if got := nic.stats.DisabledRx.Bytes.Value(); got != 4 { + if got := nic.stats.local.DisabledRx.Bytes.Value(); got != 4 { t.Errorf("got DisabledRx.Bytes = %d, want = 4", got) } - if got := nic.stats.Rx.Packets.Value(); got != 0 { + if got := nic.stats.local.Rx.Packets.Value(); got != 0 { t.Errorf("got Rx.Packets = %d, want = 0", got) } - if got := nic.stats.Rx.Bytes.Value(); got != 0 { + if got := nic.stats.local.Rx.Bytes.Value(); got != 0 { t.Errorf("got Rx.Bytes = %d, want = 0", got) } } + +func TestMultiCounterStatsInitialization(t *testing.T) { + global := tcpip.NICStats{}.FillIn() + nic := nic{ + stats: makeNICStats(global), + } + multi := nic.stats.multiCounterNICStats + local := nic.stats.local + if err := testutil.ValidateMultiCounterStats(reflect.ValueOf(&multi).Elem(), []reflect.Value{reflect.ValueOf(&local).Elem(), reflect.ValueOf(&global).Elem()}); err != nil { + t.Error(err) + } +} diff --git a/pkg/tcpip/stack/nud.go b/pkg/tcpip/stack/nud.go index 5a94e9ac6..ca9822bca 100644 --- a/pkg/tcpip/stack/nud.go +++ b/pkg/tcpip/stack/nud.go @@ -16,6 +16,7 @@ package stack import ( "math" + "math/rand" "sync" "time" @@ -313,45 +314,36 @@ func calcMaxRandomFactor(minRandomFactor float32) float32 { return defaultMaxRandomFactor } -// A Rand is a source of random numbers. -type Rand interface { - // Float32 returns, as a float32, a pseudo-random number in [0.0,1.0). - Float32() float32 -} - // NUDState stores states needed for calculating reachable time. type NUDState struct { - rng Rand + clock tcpip.Clock + rng *rand.Rand - // mu protects the fields below. - // - // It is necessary for NUDState to handle its own locking since neighbor - // entries may access the NUD state from within the goroutine spawned by - // time.AfterFunc(). This goroutine may run concurrently with the main - // process for controlling the neighbor cache and would otherwise introduce - // race conditions if NUDState was not locked properly. - mu sync.RWMutex + mu struct { + sync.RWMutex - config NUDConfigurations + config NUDConfigurations - // reachableTime is the duration to wait for a REACHABLE entry to - // transition into STALE after inactivity. This value is calculated with - // the algorithm defined in RFC 4861 section 6.3.2. - reachableTime time.Duration + // reachableTime is the duration to wait for a REACHABLE entry to + // transition into STALE after inactivity. This value is calculated with + // the algorithm defined in RFC 4861 section 6.3.2. + reachableTime time.Duration - expiration time.Time - prevBaseReachableTime time.Duration - prevMinRandomFactor float32 - prevMaxRandomFactor float32 + expiration time.Time + prevBaseReachableTime time.Duration + prevMinRandomFactor float32 + prevMaxRandomFactor float32 + } } // NewNUDState returns new NUDState using c as configuration and the specified // random number generator for use in recomputing ReachableTime. -func NewNUDState(c NUDConfigurations, rng Rand) *NUDState { +func NewNUDState(c NUDConfigurations, clock tcpip.Clock, rng *rand.Rand) *NUDState { s := &NUDState{ - rng: rng, + clock: clock, + rng: rng, } - s.config = c + s.mu.config = c return s } @@ -359,14 +351,14 @@ func NewNUDState(c NUDConfigurations, rng Rand) *NUDState { func (s *NUDState) Config() NUDConfigurations { s.mu.RLock() defer s.mu.RUnlock() - return s.config + return s.mu.config } // SetConfig replaces the existing NUD configurations with c. func (s *NUDState) SetConfig(c NUDConfigurations) { s.mu.Lock() defer s.mu.Unlock() - s.config = c + s.mu.config = c } // ReachableTime returns the duration to wait for a REACHABLE entry to @@ -377,13 +369,13 @@ func (s *NUDState) ReachableTime() time.Duration { s.mu.Lock() defer s.mu.Unlock() - if time.Now().After(s.expiration) || - s.config.BaseReachableTime != s.prevBaseReachableTime || - s.config.MinRandomFactor != s.prevMinRandomFactor || - s.config.MaxRandomFactor != s.prevMaxRandomFactor { + if s.clock.Now().After(s.mu.expiration) || + s.mu.config.BaseReachableTime != s.mu.prevBaseReachableTime || + s.mu.config.MinRandomFactor != s.mu.prevMinRandomFactor || + s.mu.config.MaxRandomFactor != s.mu.prevMaxRandomFactor { s.recomputeReachableTimeLocked() } - return s.reachableTime + return s.mu.reachableTime } // recomputeReachableTimeLocked forces a recalculation of ReachableTime using @@ -408,23 +400,23 @@ func (s *NUDState) ReachableTime() time.Duration { // // s.mu MUST be locked for writing. func (s *NUDState) recomputeReachableTimeLocked() { - s.prevBaseReachableTime = s.config.BaseReachableTime - s.prevMinRandomFactor = s.config.MinRandomFactor - s.prevMaxRandomFactor = s.config.MaxRandomFactor + s.mu.prevBaseReachableTime = s.mu.config.BaseReachableTime + s.mu.prevMinRandomFactor = s.mu.config.MinRandomFactor + s.mu.prevMaxRandomFactor = s.mu.config.MaxRandomFactor - randomFactor := s.config.MinRandomFactor + s.rng.Float32()*(s.config.MaxRandomFactor-s.config.MinRandomFactor) + randomFactor := s.mu.config.MinRandomFactor + s.rng.Float32()*(s.mu.config.MaxRandomFactor-s.mu.config.MinRandomFactor) // Check for overflow, given that minRandomFactor and maxRandomFactor are // guaranteed to be positive numbers. - if float32(math.MaxInt64)/randomFactor < float32(s.config.BaseReachableTime) { - s.reachableTime = time.Duration(math.MaxInt64) + if math.MaxInt64/randomFactor < float32(s.mu.config.BaseReachableTime) { + s.mu.reachableTime = time.Duration(math.MaxInt64) } else if randomFactor == 1 { // Avoid loss of precision when a large base reachable time is used. - s.reachableTime = s.config.BaseReachableTime + s.mu.reachableTime = s.mu.config.BaseReachableTime } else { - reachableTime := int64(float32(s.config.BaseReachableTime) * randomFactor) - s.reachableTime = time.Duration(reachableTime) + reachableTime := int64(float32(s.mu.config.BaseReachableTime) * randomFactor) + s.mu.reachableTime = time.Duration(reachableTime) } - s.expiration = time.Now().Add(2 * time.Hour) + s.mu.expiration = s.clock.Now().Add(2 * time.Hour) } diff --git a/pkg/tcpip/stack/nud_test.go b/pkg/tcpip/stack/nud_test.go index e1253f310..1aeb2f8a5 100644 --- a/pkg/tcpip/stack/nud_test.go +++ b/pkg/tcpip/stack/nud_test.go @@ -16,6 +16,7 @@ package stack_test import ( "math" + "math/rand" "testing" "time" @@ -28,17 +29,15 @@ import ( ) const ( - defaultBaseReachableTime = 30 * time.Second - minimumBaseReachableTime = time.Millisecond - defaultMinRandomFactor = 0.5 - defaultMaxRandomFactor = 1.5 - defaultRetransmitTimer = time.Second - minimumRetransmitTimer = time.Millisecond - defaultDelayFirstProbeTime = 5 * time.Second - defaultMaxMulticastProbes = 3 - defaultMaxUnicastProbes = 3 - defaultMaxAnycastDelayTime = time.Second - defaultMaxReachbilityConfirmations = 3 + defaultBaseReachableTime = 30 * time.Second + minimumBaseReachableTime = time.Millisecond + defaultMinRandomFactor = 0.5 + defaultMaxRandomFactor = 1.5 + defaultRetransmitTimer = time.Second + minimumRetransmitTimer = time.Millisecond + defaultDelayFirstProbeTime = 5 * time.Second + defaultMaxMulticastProbes = 3 + defaultMaxUnicastProbes = 3 defaultFakeRandomNum = 0.5 ) @@ -48,12 +47,14 @@ type fakeRand struct { num float32 } -var _ stack.Rand = (*fakeRand)(nil) +var _ rand.Source = (*fakeRand)(nil) -func (f *fakeRand) Float32() float32 { - return f.num +func (f *fakeRand) Int63() int64 { + return int64(f.num * float32(1<<63)) } +func (*fakeRand) Seed(int64) {} + func TestNUDFunctions(t *testing.T) { const nicID = 1 @@ -169,7 +170,7 @@ func TestNUDFunctions(t *testing.T) { t.Errorf("s.Neigbors(%d, %d) error mismatch (-want +got):\n%s", test.nicID, ipv6.ProtocolNumber, diff) } else if test.expectedErr == nil { if diff := cmp.Diff( - []stack.NeighborEntry{{Addr: llAddr2, LinkAddr: linkAddr1, State: stack.Static, UpdatedAtNanos: clock.NowNanoseconds()}}, + []stack.NeighborEntry{{Addr: llAddr2, LinkAddr: linkAddr1, State: stack.Static, UpdatedAt: clock.Now()}}, neighbors, ); diff != "" { t.Errorf("neighbors mismatch (-want +got):\n%s", diff) @@ -710,7 +711,8 @@ func TestNUDStateReachableTime(t *testing.T) { rng := fakeRand{ num: defaultFakeRandomNum, } - s := stack.NewNUDState(c, &rng) + var clock faketime.NullClock + s := stack.NewNUDState(c, &clock, rand.New(&rng)) if got, want := s.ReachableTime(), test.want; got != want { t.Errorf("got ReachableTime = %q, want = %q", got, want) } @@ -782,7 +784,8 @@ func TestNUDStateRecomputeReachableTime(t *testing.T) { rng := fakeRand{ num: defaultFakeRandomNum, } - s := stack.NewNUDState(c, &rng) + var clock faketime.NullClock + s := stack.NewNUDState(c, &clock, rand.New(&rng)) old := s.ReachableTime() if got, want := s.ReachableTime(), old; got != want { diff --git a/pkg/tcpip/stack/packet_buffer.go b/pkg/tcpip/stack/packet_buffer.go index e2e073091..9192d8433 100644 --- a/pkg/tcpip/stack/packet_buffer.go +++ b/pkg/tcpip/stack/packet_buffer.go @@ -134,7 +134,7 @@ type PacketBuffer struct { // https://www.man7.org/linux/man-pages/man7/packet.7.html. PktType tcpip.PacketType - // NICID is the ID of the interface the network packet was received at. + // NICID is the ID of the last interface the network packet was handled at. NICID tcpip.NICID // RXTransportChecksumValidated indicates that transport checksum verification @@ -245,10 +245,10 @@ func (pk *PacketBuffer) dataOffset() int { func (pk *PacketBuffer) push(typ headerType, size int) tcpipbuffer.View { h := &pk.headers[typ] if h.length > 0 { - panic(fmt.Sprintf("push must not be called twice: type %s", typ)) + panic(fmt.Sprintf("push(%s, %d) called after previous push", typ, size)) } if pk.pushed+size > pk.reserved { - panic("not enough headroom reserved") + panic(fmt.Sprintf("push(%s, %d) overflows; pushed=%d reserved=%d", typ, size, pk.pushed, pk.reserved)) } pk.pushed += size h.offset = -pk.pushed @@ -261,7 +261,7 @@ func (pk *PacketBuffer) consume(typ headerType, size int) (v tcpipbuffer.View, c if h.length > 0 { panic(fmt.Sprintf("consume must not be called twice: type %s", typ)) } - if pk.headerOffset()+pk.consumed+size > int(pk.buf.Size()) { + if pk.reserved+pk.consumed+size > int(pk.buf.Size()) { return nil, false } h.offset = pk.consumed diff --git a/pkg/tcpip/stack/packet_buffer_test.go b/pkg/tcpip/stack/packet_buffer_test.go index 1c1aeb950..a8da34992 100644 --- a/pkg/tcpip/stack/packet_buffer_test.go +++ b/pkg/tcpip/stack/packet_buffer_test.go @@ -259,6 +259,37 @@ func TestPacketHeaderPushConsumeMixed(t *testing.T) { }) } +func TestPacketHeaderPushConsumeMixedTooLong(t *testing.T) { + link := makeView(10) + network := makeView(20) + data := makeView(30) + + initData := concatViews(network, data) + pk := NewPacketBuffer(PacketBufferOptions{ + ReserveHeaderBytes: len(link), + Data: buffer.NewViewFromBytes(initData).ToVectorisedView(), + }) + + // 1. Push link header + copy(pk.LinkHeader().Push(len(link)), link) + + checkPacketContents(t, "" /* prefix */, pk, packetContents{ + link: link, + data: initData, + }) + + // 2. Consume network header, with a number of bytes too large. + gotNetwork, ok := pk.NetworkHeader().Consume(len(initData) + 1) + if ok { + t.Fatalf("pk.NetworkHeader().Consume(%d) = %q, true; want _, false", len(initData)+1, gotNetwork) + } + + checkPacketContents(t, "" /* prefix */, pk, packetContents{ + link: link, + data: initData, + }) +} + func TestPacketHeaderPushCalledAtMostOnce(t *testing.T) { const headerSize = 10 diff --git a/pkg/tcpip/stack/rand.go b/pkg/tcpip/stack/rand.go index 421fb5c15..c8294eb6e 100644 --- a/pkg/tcpip/stack/rand.go +++ b/pkg/tcpip/stack/rand.go @@ -15,7 +15,7 @@ package stack import ( - mathrand "math/rand" + "math/rand" "gvisor.dev/gvisor/pkg/sync" ) @@ -23,7 +23,7 @@ import ( // lockedRandomSource provides a threadsafe rand.Source. type lockedRandomSource struct { mu sync.Mutex - src mathrand.Source + src rand.Source } func (r *lockedRandomSource) Int63() (n int64) { diff --git a/pkg/tcpip/stack/registration.go b/pkg/tcpip/stack/registration.go index a82c807b4..a038389e0 100644 --- a/pkg/tcpip/stack/registration.go +++ b/pkg/tcpip/stack/registration.go @@ -420,7 +420,7 @@ const ( PermanentExpired // Temporary is an endpoint, created on a one-off basis to temporarily - // consider the NIC bound an an address that it is not explictiy bound to + // consider the NIC bound an an address that it is not explicitly bound to // (such as a permanent address). Its reference count must not be biased by 1 // so that the address is removed immediately when references to it are no // longer held. @@ -630,7 +630,7 @@ type NetworkEndpoint interface { // HandlePacket takes ownership of pkt. HandlePacket(pkt *PacketBuffer) - // Close is called when the endpoint is reomved from a stack. + // Close is called when the endpoint is removed from a stack. Close() // NetworkProtocolNumber returns the tcpip.NetworkProtocolNumber for @@ -658,9 +658,9 @@ type IPNetworkEndpointStats interface { IPStats() *tcpip.IPStats } -// ForwardingNetworkProtocol is a NetworkProtocol that may forward packets. -type ForwardingNetworkProtocol interface { - NetworkProtocol +// ForwardingNetworkEndpoint is a network endpoint that may forward packets. +type ForwardingNetworkEndpoint interface { + NetworkEndpoint // Forwarding returns the forwarding configuration. Forwarding() bool @@ -968,7 +968,7 @@ type DuplicateAddressDetector interface { // called with the result of the original DAD request. CheckDuplicateAddress(tcpip.Address, DADCompletionHandler) DADCheckAddressDisposition - // SetDADConfiguations sets the configurations for DAD. + // SetDADConfigurations sets the configurations for DAD. SetDADConfigurations(c DADConfigurations) // DuplicateAddressProtocol returns the network protocol the receiver can @@ -979,7 +979,7 @@ type DuplicateAddressDetector interface { // LinkAddressResolver handles link address resolution for a network protocol. type LinkAddressResolver interface { // LinkAddressRequest sends a request for the link address of the target - // address. The request is broadcasted on the local network if a remote link + // address. The request is broadcast on the local network if a remote link // address is not provided. LinkAddressRequest(targetAddr, localAddr tcpip.Address, remoteLinkAddr tcpip.LinkAddress) tcpip.Error @@ -1072,4 +1072,4 @@ type GSOEndpoint interface { // SoftwareGSOMaxSize is a maximum allowed size of a software GSO segment. // This isn't a hard limit, because it is never set into packet headers. -const SoftwareGSOMaxSize = (1 << 16) +const SoftwareGSOMaxSize = 1 << 16 diff --git a/pkg/tcpip/stack/route.go b/pkg/tcpip/stack/route.go index 8a044c073..f17c04277 100644 --- a/pkg/tcpip/stack/route.go +++ b/pkg/tcpip/stack/route.go @@ -446,7 +446,7 @@ func (r *Route) isValidForOutgoingRLocked() bool { // If the source NIC and outgoing NIC are different, make sure the stack has // forwarding enabled, or the packet will be handled locally. - if r.outgoingNIC != r.localAddressNIC && !r.outgoingNIC.stack.Forwarding(r.NetProto()) && (!r.outgoingNIC.stack.handleLocal || !r.outgoingNIC.hasAddress(r.NetProto(), r.RemoteAddress())) { + if r.outgoingNIC != r.localAddressNIC && !isNICForwarding(r.localAddressNIC, r.NetProto()) && (!r.outgoingNIC.stack.handleLocal || !r.outgoingNIC.hasAddress(r.NetProto(), r.RemoteAddress())) { return false } diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go index 483a960c8..81fabe29a 100644 --- a/pkg/tcpip/stack/stack.go +++ b/pkg/tcpip/stack/stack.go @@ -20,17 +20,16 @@ package stack import ( - "bytes" "encoding/binary" "fmt" "io" - mathrand "math/rand" + "math/rand" "sync/atomic" "time" "golang.org/x/time/rate" "gvisor.dev/gvisor/pkg/atomicbitops" - "gvisor.dev/gvisor/pkg/rand" + cryptorand "gvisor.dev/gvisor/pkg/rand" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" @@ -40,13 +39,6 @@ import ( ) const ( - // ageLimit is set to the same cache stale time used in Linux. - ageLimit = 1 * time.Minute - // resolutionTimeout is set to the same ARP timeout used in Linux. - resolutionTimeout = 1 * time.Second - // resolutionAttempts is set to the same ARP retries used in Linux. - resolutionAttempts = 3 - // DefaultTOS is the default type of service value for network endpoints. DefaultTOS = 0 ) @@ -95,8 +87,9 @@ type Stack struct { } } - mu sync.RWMutex - nics map[tcpip.NICID]*nic + mu sync.RWMutex + nics map[tcpip.NICID]*nic + defaultForwardingEnabled map[tcpip.NetworkProtocolNumber]struct{} // cleanupEndpointsMu protects cleanupEndpoints. cleanupEndpointsMu sync.Mutex @@ -115,7 +108,7 @@ type Stack struct { handleLocal bool // tables are the iptables packet filtering and manipulation rules. - // TODO(gvisor.dev/issue/170): S/R this field. + // TODO(gvisor.dev/issue/4595): S/R this field. tables *IPTables // resumableEndpoints is a list of endpoints that need to be resumed if the @@ -144,7 +137,7 @@ type Stack struct { // randomGenerator is an injectable pseudo random generator that can be // used when a random number is required. - randomGenerator *mathrand.Rand + randomGenerator *rand.Rand // secureRNG is a cryptographically secure random number generator. secureRNG io.Reader @@ -195,9 +188,9 @@ type Options struct { // TransportProtocols lists the transport protocols to enable. TransportProtocols []TransportProtocolFactory - // Clock is an optional clock source used for timestampping packets. + // Clock is an optional clock used for timekeeping. // - // If no Clock is specified, the clock source will be time.Now. + // If Clock is nil, tcpip.NewStdClock() will be used. Clock tcpip.Clock // Stats are optional statistic counters. @@ -224,15 +217,21 @@ type Options struct { // RandSource is an optional source to use to generate random // numbers. If omitted it defaults to a Source seeded by the data - // returned by rand.Read(). + // returned by the stack secure RNG. // // RandSource must be thread-safe. - RandSource mathrand.Source + RandSource rand.Source - // IPTables are the initial iptables rules. If nil, iptables will allow + // IPTables are the initial iptables rules. If nil, DefaultIPTables will be + // used to construct the initial iptables rules. // all traffic. IPTables *IPTables + // DefaultIPTables is an optional iptables rules constructor that is called + // if IPTables is nil. If both fields are nil, iptables will allow all + // traffic. + DefaultIPTables func(uint32) *IPTables + // SecureRNG is a cryptographically secure random number generator. SecureRNG io.Reader } @@ -330,40 +329,50 @@ func New(opts Options) *Stack { opts.UniqueID = new(uniqueIDGenerator) } + if opts.SecureRNG == nil { + opts.SecureRNG = cryptorand.Reader + } + randSrc := opts.RandSource if randSrc == nil { - // Source provided by mathrand.NewSource is not thread-safe so + var v int64 + if err := binary.Read(opts.SecureRNG, binary.LittleEndian, &v); err != nil { + panic(err) + } + // Source provided by rand.NewSource is not thread-safe so // we wrap it in a simple thread-safe version. - randSrc = &lockedRandomSource{src: mathrand.NewSource(generateRandInt64())} + randSrc = &lockedRandomSource{src: rand.NewSource(v)} } + randomGenerator := rand.New(randSrc) + seed := randomGenerator.Uint32() if opts.IPTables == nil { - opts.IPTables = DefaultTables() + if opts.DefaultIPTables == nil { + opts.DefaultIPTables = DefaultTables + } + opts.IPTables = opts.DefaultIPTables(seed) } opts.NUDConfigs.resetInvalidFields() - if opts.SecureRNG == nil { - opts.SecureRNG = rand.Reader - } - s := &Stack{ - transportProtocols: make(map[tcpip.TransportProtocolNumber]*transportProtocolState), - networkProtocols: make(map[tcpip.NetworkProtocolNumber]NetworkProtocol), - nics: make(map[tcpip.NICID]*nic), - cleanupEndpoints: make(map[TransportEndpoint]struct{}), - PortManager: ports.NewPortManager(), - clock: clock, - stats: opts.Stats.FillIn(), - handleLocal: opts.HandleLocal, - tables: opts.IPTables, - icmpRateLimiter: NewICMPRateLimiter(), - seed: generateRandUint32(), - nudConfigs: opts.NUDConfigs, - uniqueIDGenerator: opts.UniqueID, - nudDisp: opts.NUDDisp, - randomGenerator: mathrand.New(randSrc), - secureRNG: opts.SecureRNG, + transportProtocols: make(map[tcpip.TransportProtocolNumber]*transportProtocolState), + networkProtocols: make(map[tcpip.NetworkProtocolNumber]NetworkProtocol), + nics: make(map[tcpip.NICID]*nic), + defaultForwardingEnabled: make(map[tcpip.NetworkProtocolNumber]struct{}), + cleanupEndpoints: make(map[TransportEndpoint]struct{}), + PortManager: ports.NewPortManager(), + clock: clock, + stats: opts.Stats.FillIn(), + handleLocal: opts.HandleLocal, + tables: opts.IPTables, + icmpRateLimiter: NewICMPRateLimiter(), + seed: seed, + nudConfigs: opts.NUDConfigs, + uniqueIDGenerator: opts.UniqueID, + nudDisp: opts.NUDDisp, + randomGenerator: randomGenerator, + secureRNG: opts.SecureRNG, sendBufferSize: tcpip.SendBufferSizeOption{ Min: MinBufferSize, Default: DefaultBufferSize, @@ -492,37 +501,61 @@ func (s *Stack) Stats() tcpip.Stats { return s.stats } -// SetForwardingDefaultAndAllNICs sets packet forwarding for all NICs for the -// passed protocol and sets the default setting for newly created NICs. -func (s *Stack) SetForwardingDefaultAndAllNICs(protocolNum tcpip.NetworkProtocolNumber, enable bool) tcpip.Error { - protocol, ok := s.networkProtocols[protocolNum] +// SetNICForwarding enables or disables packet forwarding on the specified NIC +// for the passed protocol. +func (s *Stack) SetNICForwarding(id tcpip.NICID, protocol tcpip.NetworkProtocolNumber, enable bool) tcpip.Error { + s.mu.RLock() + defer s.mu.RUnlock() + + nic, ok := s.nics[id] if !ok { - return &tcpip.ErrUnknownProtocol{} + return &tcpip.ErrUnknownNICID{} } - forwardingProtocol, ok := protocol.(ForwardingNetworkProtocol) + return nic.setForwarding(protocol, enable) +} + +// NICForwarding returns the forwarding configuration for the specified NIC. +func (s *Stack) NICForwarding(id tcpip.NICID, protocol tcpip.NetworkProtocolNumber) (bool, tcpip.Error) { + s.mu.RLock() + defer s.mu.RUnlock() + + nic, ok := s.nics[id] if !ok { - return &tcpip.ErrNotSupported{} + return false, &tcpip.ErrUnknownNICID{} } - forwardingProtocol.SetForwarding(enable) - return nil + return nic.forwarding(protocol) } -// Forwarding returns true if packet forwarding between NICs is enabled for the -// passed protocol. -func (s *Stack) Forwarding(protocolNum tcpip.NetworkProtocolNumber) bool { - protocol, ok := s.networkProtocols[protocolNum] - if !ok { - return false +// SetForwardingDefaultAndAllNICs sets packet forwarding for all NICs for the +// passed protocol and sets the default setting for newly created NICs. +func (s *Stack) SetForwardingDefaultAndAllNICs(protocol tcpip.NetworkProtocolNumber, enable bool) tcpip.Error { + s.mu.Lock() + defer s.mu.Unlock() + + doneOnce := false + for id, nic := range s.nics { + if err := nic.setForwarding(protocol, enable); err != nil { + // Expect forwarding to be settable on all interfaces if it was set on + // one. + if doneOnce { + panic(fmt.Sprintf("nic(id=%d).setForwarding(%d, %t): %s", id, protocol, enable, err)) + } + + return err + } + + doneOnce = true } - forwardingProtocol, ok := protocol.(ForwardingNetworkProtocol) - if !ok { - return false + if enable { + s.defaultForwardingEnabled[protocol] = struct{}{} + } else { + delete(s.defaultForwardingEnabled, protocol) } - return forwardingProtocol.Forwarding() + return nil } // PortRange returns the UDP and TCP inclusive range of ephemeral ports used in @@ -659,6 +692,11 @@ func (s *Stack) CreateNICWithOptions(id tcpip.NICID, ep LinkEndpoint, opts NICOp } n := newNIC(s, id, opts.Name, ep, opts.Context) + for proto := range s.defaultForwardingEnabled { + if err := n.setForwarding(proto, true); err != nil { + panic(fmt.Sprintf("newNIC(%d, ...).setForwarding(%d, true): %s", id, proto, err)) + } + } s.nics[id] = n if !opts.Disabled { return n.enable() @@ -773,7 +811,7 @@ type NICInfo struct { // MTU is the maximum transmission unit. MTU uint32 - Stats NICStats + Stats tcpip.NICStats // NetworkStats holds the stats of each NetworkEndpoint bound to the NIC. NetworkStats map[tcpip.NetworkProtocolNumber]NetworkEndpointStats @@ -786,6 +824,10 @@ type NICInfo struct { // value sent in haType field of an ARP Request sent by this NIC and the // value expected in the haType field of an ARP response. ARPHardwareType header.ARPHardwareType + + // Forwarding holds the forwarding status for each network endpoint that + // supports forwarding. + Forwarding map[tcpip.NetworkProtocolNumber]bool } // HasNIC returns true if the NICID is defined in the stack. @@ -815,17 +857,33 @@ func (s *Stack) NICInfo() map[tcpip.NICID]NICInfo { netStats[proto] = netEP.Stats() } - nics[id] = NICInfo{ + info := NICInfo{ Name: nic.name, LinkAddress: nic.LinkEndpoint.LinkAddress(), ProtocolAddresses: nic.primaryAddresses(), Flags: flags, MTU: nic.LinkEndpoint.MTU(), - Stats: nic.stats, + Stats: nic.stats.local, NetworkStats: netStats, Context: nic.context, ARPHardwareType: nic.LinkEndpoint.ARPHardwareType(), + Forwarding: make(map[tcpip.NetworkProtocolNumber]bool), } + + for proto := range s.networkProtocols { + switch forwarding, err := nic.forwarding(proto); err.(type) { + case nil: + info.Forwarding[proto] = forwarding + case *tcpip.ErrUnknownProtocol: + panic(fmt.Sprintf("expected network protocol %d to be available on NIC %d", proto, nic.ID())) + case *tcpip.ErrNotSupported: + // Not all network protocols support forwarding. + default: + panic(fmt.Sprintf("nic(id=%d).forwarding(%d): %s", nic.ID(), proto, err)) + } + } + + nics[id] = info } return nics } @@ -1029,6 +1087,20 @@ func (s *Stack) HandleLocal() bool { return s.handleLocal } +func isNICForwarding(nic *nic, proto tcpip.NetworkProtocolNumber) bool { + switch forwarding, err := nic.forwarding(proto); err.(type) { + case nil: + return forwarding + case *tcpip.ErrUnknownProtocol: + panic(fmt.Sprintf("expected network protocol %d to be available on NIC %d", proto, nic.ID())) + case *tcpip.ErrNotSupported: + // Not all network protocols support forwarding. + return false + default: + panic(fmt.Sprintf("nic(id=%d).forwarding(%d): %s", nic.ID(), proto, err)) + } +} + // FindRoute creates a route to the given destination address, leaving through // the given NIC and local address (if provided). // @@ -1081,7 +1153,7 @@ func (s *Stack) FindRoute(id tcpip.NICID, localAddr, remoteAddr tcpip.Address, n return nil, &tcpip.ErrNetworkUnreachable{} } - canForward := s.Forwarding(netProto) && !header.IsV6LinkLocalUnicastAddress(localAddr) && !isLinkLocal + onlyGlobalAddresses := !header.IsV6LinkLocalUnicastAddress(localAddr) && !isLinkLocal // Find a route to the remote with the route table. var chosenRoute tcpip.Route @@ -1120,7 +1192,7 @@ func (s *Stack) FindRoute(id tcpip.NICID, localAddr, remoteAddr tcpip.Address, n // requirement to do this from any RFC but simply a choice made to better // follow a strong host model which the netstack follows at the time of // writing. - if canForward && chosenRoute == (tcpip.Route{}) { + if onlyGlobalAddresses && chosenRoute == (tcpip.Route{}) && isNICForwarding(nic, netProto) { chosenRoute = route } } @@ -1754,7 +1826,7 @@ func (s *Stack) Seed() uint32 { // Rand returns a reference to a pseudo random generator that can be used // to generate random numbers as required. -func (s *Stack) Rand() *mathrand.Rand { +func (s *Stack) Rand() *rand.Rand { return s.randomGenerator } @@ -1764,27 +1836,6 @@ func (s *Stack) SecureRNG() io.Reader { return s.secureRNG } -func generateRandUint32() uint32 { - b := make([]byte, 4) - if _, err := rand.Read(b); err != nil { - panic(err) - } - return binary.LittleEndian.Uint32(b) -} - -func generateRandInt64() int64 { - b := make([]byte, 8) - if _, err := rand.Read(b); err != nil { - panic(err) - } - buf := bytes.NewReader(b) - var v int64 - if err := binary.Read(buf, binary.LittleEndian, &v); err != nil { - panic(err) - } - return v -} - // FindNICNameFromID returns the name of the NIC for the given NICID. func (s *Stack) FindNICNameFromID(id tcpip.NICID) string { s.mu.RLock() @@ -1821,9 +1872,8 @@ const ( // ParsePacketBufferTransport parses the provided packet buffer's transport // header. func (s *Stack) ParsePacketBufferTransport(protocol tcpip.TransportProtocolNumber, pkt *PacketBuffer) ParseResult { - // TODO(gvisor.dev/issue/170): ICMP packets don't have their TransportHeader - // fields set yet, parse it here. See icmp/protocol.go:protocol.Parse for a - // full explanation. + // ICMP packets don't have their TransportHeader fields set yet, parse it + // here. See icmp/protocol.go:protocol.Parse for a full explanation. if protocol == header.ICMPv4ProtocolNumber || protocol == header.ICMPv6ProtocolNumber { return ParsedOK } diff --git a/pkg/tcpip/stack/stack_global_state.go b/pkg/tcpip/stack/stack_global_state.go index 33824afd0..dfec4258a 100644 --- a/pkg/tcpip/stack/stack_global_state.go +++ b/pkg/tcpip/stack/stack_global_state.go @@ -14,78 +14,6 @@ package stack -import "time" - // StackFromEnv is the global stack created in restore run. // FIXME(b/36201077) var StackFromEnv *Stack - -// saveT is invoked by stateify. -func (t *TCPCubicState) saveT() unixTime { - return unixTime{t.T.Unix(), t.T.UnixNano()} -} - -// loadT is invoked by stateify. -func (t *TCPCubicState) loadT(unix unixTime) { - t.T = time.Unix(unix.second, unix.nano) -} - -// saveXmitTime is invoked by stateify. -func (t *TCPRACKState) saveXmitTime() unixTime { - return unixTime{t.XmitTime.Unix(), t.XmitTime.UnixNano()} -} - -// loadXmitTime is invoked by stateify. -func (t *TCPRACKState) loadXmitTime(unix unixTime) { - t.XmitTime = time.Unix(unix.second, unix.nano) -} - -// saveLastSendTime is invoked by stateify. -func (t *TCPSenderState) saveLastSendTime() unixTime { - return unixTime{t.LastSendTime.Unix(), t.LastSendTime.UnixNano()} -} - -// loadLastSendTime is invoked by stateify. -func (t *TCPSenderState) loadLastSendTime(unix unixTime) { - t.LastSendTime = time.Unix(unix.second, unix.nano) -} - -// saveRTTMeasureTime is invoked by stateify. -func (t *TCPSenderState) saveRTTMeasureTime() unixTime { - return unixTime{t.RTTMeasureTime.Unix(), t.RTTMeasureTime.UnixNano()} -} - -// loadRTTMeasureTime is invoked by stateify. -func (t *TCPSenderState) loadRTTMeasureTime(unix unixTime) { - t.RTTMeasureTime = time.Unix(unix.second, unix.nano) -} - -// saveMeasureTime is invoked by stateify. -func (r *RcvBufAutoTuneParams) saveMeasureTime() unixTime { - return unixTime{r.MeasureTime.Unix(), r.MeasureTime.UnixNano()} -} - -// loadMeasureTime is invoked by stateify. -func (r *RcvBufAutoTuneParams) loadMeasureTime(unix unixTime) { - r.MeasureTime = time.Unix(unix.second, unix.nano) -} - -// saveRTTMeasureTime is invoked by stateify. -func (r *RcvBufAutoTuneParams) saveRTTMeasureTime() unixTime { - return unixTime{r.RTTMeasureTime.Unix(), r.RTTMeasureTime.UnixNano()} -} - -// loadRTTMeasureTime is invoked by stateify. -func (r *RcvBufAutoTuneParams) loadRTTMeasureTime(unix unixTime) { - r.RTTMeasureTime = time.Unix(unix.second, unix.nano) -} - -// saveSegTime is invoked by stateify. -func (t *TCPEndpointState) saveSegTime() unixTime { - return unixTime{t.SegTime.Unix(), t.SegTime.UnixNano()} -} - -// loadSegTime is invoked by stateify. -func (t *TCPEndpointState) loadSegTime(unix unixTime) { - t.SegTime = time.Unix(unix.second, unix.nano) -} diff --git a/pkg/tcpip/stack/stack_test.go b/pkg/tcpip/stack/stack_test.go index ff88b1bd3..21951d05a 100644 --- a/pkg/tcpip/stack/stack_test.go +++ b/pkg/tcpip/stack/stack_test.go @@ -84,7 +84,8 @@ type fakeNetworkEndpoint struct { mu struct { sync.RWMutex - enabled bool + enabled bool + forwarding bool } nic stack.NetworkInterface @@ -165,10 +166,6 @@ func (f *fakeNetworkEndpoint) MaxHeaderLength() uint16 { return f.nic.MaxHeaderLength() + fakeNetHeaderLen } -func (*fakeNetworkEndpoint) PseudoHeaderChecksum(protocol tcpip.TransportProtocolNumber, dstAddr tcpip.Address) uint16 { - return 0 -} - func (f *fakeNetworkEndpoint) NetworkProtocolNumber() tcpip.NetworkProtocolNumber { return f.proto.Number() } @@ -196,11 +193,11 @@ func (f *fakeNetworkEndpoint) WritePacket(r *stack.Route, params stack.NetworkHe } // WritePackets implements stack.LinkEndpoint.WritePackets. -func (*fakeNetworkEndpoint) WritePackets(r *stack.Route, pkts stack.PacketBufferList, params stack.NetworkHeaderParams) (int, tcpip.Error) { +func (*fakeNetworkEndpoint) WritePackets(*stack.Route, stack.PacketBufferList, stack.NetworkHeaderParams) (int, tcpip.Error) { panic("not implemented") } -func (*fakeNetworkEndpoint) WriteHeaderIncludedPacket(r *stack.Route, pkt *stack.PacketBuffer) tcpip.Error { +func (*fakeNetworkEndpoint) WriteHeaderIncludedPacket(*stack.Route, *stack.PacketBuffer) tcpip.Error { return &tcpip.ErrNotSupported{} } @@ -227,11 +224,6 @@ type fakeNetworkProtocol struct { packetCount [10]int sendPacketCount [10]int defaultTTL uint8 - - mu struct { - sync.RWMutex - forwarding bool - } } func (*fakeNetworkProtocol) Number() tcpip.NetworkProtocolNumber { @@ -300,15 +292,15 @@ func (*fakeNetworkProtocol) Parse(pkt *stack.PacketBuffer) (tcpip.TransportProto return tcpip.TransportProtocolNumber(hdr[protocolNumberOffset]), true, true } -// Forwarding implements stack.ForwardingNetworkProtocol. -func (f *fakeNetworkProtocol) Forwarding() bool { +// Forwarding implements stack.ForwardingNetworkEndpoint. +func (f *fakeNetworkEndpoint) Forwarding() bool { f.mu.RLock() defer f.mu.RUnlock() return f.mu.forwarding } -// SetForwarding implements stack.ForwardingNetworkProtocol. -func (f *fakeNetworkProtocol) SetForwarding(v bool) { +// SetForwarding implements stack.ForwardingNetworkEndpoint. +func (f *fakeNetworkEndpoint) SetForwarding(v bool) { f.mu.Lock() defer f.mu.Unlock() f.mu.forwarding = v @@ -467,14 +459,14 @@ func testSend(t *testing.T, r *stack.Route, ep *channel.Endpoint, payload buffer } } -func testFailingSend(t *testing.T, r *stack.Route, ep *channel.Endpoint, payload buffer.View, wantErr tcpip.Error) { +func testFailingSend(t *testing.T, r *stack.Route, payload buffer.View, wantErr tcpip.Error) { t.Helper() if gotErr := send(r, payload); gotErr != wantErr { t.Errorf("send failed: got = %s, want = %s ", gotErr, wantErr) } } -func testFailingSendTo(t *testing.T, s *stack.Stack, addr tcpip.Address, ep *channel.Endpoint, payload buffer.View, wantErr tcpip.Error) { +func testFailingSendTo(t *testing.T, s *stack.Stack, addr tcpip.Address, payload buffer.View, wantErr tcpip.Error) { t.Helper() if gotErr := sendTo(s, addr, payload); gotErr != wantErr { t.Errorf("sendto failed: got = %s, want = %s ", gotErr, wantErr) @@ -924,15 +916,15 @@ func TestRouteWithDownNIC(t *testing.T) { if err := test.downFn(s, nicID1); err != nil { t.Fatalf("test.downFn(_, %d): %s", nicID1, err) } - testFailingSend(t, r1, ep1, buf, &tcpip.ErrInvalidEndpointState{}) + testFailingSend(t, r1, buf, &tcpip.ErrInvalidEndpointState{}) testSend(t, r2, ep2, buf) // Writes with Routes that use NIC2 after being brought down should fail. if err := test.downFn(s, nicID2); err != nil { t.Fatalf("test.downFn(_, %d): %s", nicID2, err) } - testFailingSend(t, r1, ep1, buf, &tcpip.ErrInvalidEndpointState{}) - testFailingSend(t, r2, ep2, buf, &tcpip.ErrInvalidEndpointState{}) + testFailingSend(t, r1, buf, &tcpip.ErrInvalidEndpointState{}) + testFailingSend(t, r2, buf, &tcpip.ErrInvalidEndpointState{}) if upFn := test.upFn; upFn != nil { // Writes with Routes that use NIC1 after being brought up should @@ -945,7 +937,7 @@ func TestRouteWithDownNIC(t *testing.T) { t.Fatalf("test.upFn(_, %d): %s", nicID1, err) } testSend(t, r1, ep1, buf) - testFailingSend(t, r2, ep2, buf, &tcpip.ErrInvalidEndpointState{}) + testFailingSend(t, r2, buf, &tcpip.ErrInvalidEndpointState{}) } }) } @@ -1070,7 +1062,7 @@ func TestAddressRemoval(t *testing.T) { t.Fatal("RemoveAddress failed:", err) } testFailingRecv(t, fakeNet, localAddrByte, ep, buf) - testFailingSendTo(t, s, remoteAddr, ep, nil, &tcpip.ErrNoRoute{}) + testFailingSendTo(t, s, remoteAddr, nil, &tcpip.ErrNoRoute{}) // Check that removing the same address fails. err := s.RemoveAddress(1, localAddr) @@ -1122,8 +1114,8 @@ func TestAddressRemovalWithRouteHeld(t *testing.T) { t.Fatal("RemoveAddress failed:", err) } testFailingRecv(t, fakeNet, localAddrByte, ep, buf) - testFailingSend(t, r, ep, nil, &tcpip.ErrInvalidEndpointState{}) - testFailingSendTo(t, s, remoteAddr, ep, nil, &tcpip.ErrNoRoute{}) + testFailingSend(t, r, nil, &tcpip.ErrInvalidEndpointState{}) + testFailingSendTo(t, s, remoteAddr, nil, &tcpip.ErrNoRoute{}) // Check that removing the same address fails. { @@ -1144,7 +1136,7 @@ func verifyAddress(t *testing.T, s *stack.Stack, nicID tcpip.NICID, addr tcpip.A // No address given, verify that there is no address assigned to the NIC. for _, a := range info.ProtocolAddresses { if a.Protocol == fakeNetNumber && a.AddressWithPrefix != (tcpip.AddressWithPrefix{}) { - t.Errorf("verify no-address: got = %s, want = %s", a.AddressWithPrefix, (tcpip.AddressWithPrefix{})) + t.Errorf("verify no-address: got = %s, want = %s", a.AddressWithPrefix, tcpip.AddressWithPrefix{}) } } return @@ -1224,7 +1216,7 @@ func TestEndpointExpiration(t *testing.T) { // FIXME(b/139841518):Spoofing doesn't work if there is no primary address. // testSendTo(t, s, remoteAddr, ep, nil) } else { - testFailingSendTo(t, s, remoteAddr, ep, nil, &tcpip.ErrNoRoute{}) + testFailingSendTo(t, s, remoteAddr, nil, &tcpip.ErrNoRoute{}) } // 2. Add Address, everything should work. @@ -1252,7 +1244,7 @@ func TestEndpointExpiration(t *testing.T) { // FIXME(b/139841518):Spoofing doesn't work if there is no primary address. // testSendTo(t, s, remoteAddr, ep, nil) } else { - testFailingSendTo(t, s, remoteAddr, ep, nil, &tcpip.ErrNoRoute{}) + testFailingSendTo(t, s, remoteAddr, nil, &tcpip.ErrNoRoute{}) } // 4. Add Address back, everything should work again. @@ -1291,8 +1283,8 @@ func TestEndpointExpiration(t *testing.T) { testSend(t, r, ep, nil) testSendTo(t, s, remoteAddr, ep, nil) } else { - testFailingSend(t, r, ep, nil, &tcpip.ErrInvalidEndpointState{}) - testFailingSendTo(t, s, remoteAddr, ep, nil, &tcpip.ErrNoRoute{}) + testFailingSend(t, r, nil, &tcpip.ErrInvalidEndpointState{}) + testFailingSendTo(t, s, remoteAddr, nil, &tcpip.ErrNoRoute{}) } // 7. Add Address back, everything should work again. @@ -1328,7 +1320,7 @@ func TestEndpointExpiration(t *testing.T) { // FIXME(b/139841518):Spoofing doesn't work if there is no primary address. // testSendTo(t, s, remoteAddr, ep, nil) } else { - testFailingSendTo(t, s, remoteAddr, ep, nil, &tcpip.ErrNoRoute{}) + testFailingSendTo(t, s, remoteAddr, nil, &tcpip.ErrNoRoute{}) } }) } @@ -1578,7 +1570,7 @@ func TestSpoofingNoAddress(t *testing.T) { t.Errorf("FindRoute succeeded with route %+v when it should have failed", r) } // Sending a packet fails. - testFailingSendTo(t, s, dstAddr, ep, nil, &tcpip.ErrNoRoute{}) + testFailingSendTo(t, s, dstAddr, nil, &tcpip.ErrNoRoute{}) // With address spoofing enabled, FindRoute permits any address to be used // as the source. @@ -1619,7 +1611,7 @@ func TestOutgoingBroadcastWithEmptyRouteTable(t *testing.T) { } } - protoAddr := tcpip.ProtocolAddress{Protocol: fakeNetNumber, AddressWithPrefix: tcpip.AddressWithPrefix{header.IPv4Any, 0}} + protoAddr := tcpip.ProtocolAddress{Protocol: fakeNetNumber, AddressWithPrefix: tcpip.AddressWithPrefix{Address: header.IPv4Any}} if err := s.AddProtocolAddress(1, protoAddr); err != nil { t.Fatalf("AddProtocolAddress(1, %v) failed: %v", protoAddr, err) } @@ -1645,12 +1637,12 @@ func TestOutgoingBroadcastWithEmptyRouteTable(t *testing.T) { } func TestOutgoingBroadcastWithRouteTable(t *testing.T) { - defaultAddr := tcpip.AddressWithPrefix{header.IPv4Any, 0} + defaultAddr := tcpip.AddressWithPrefix{Address: header.IPv4Any} // Local subnet on NIC1: 192.168.1.58/24, gateway 192.168.1.1. - nic1Addr := tcpip.AddressWithPrefix{"\xc0\xa8\x01\x3a", 24} + nic1Addr := tcpip.AddressWithPrefix{Address: "\xc0\xa8\x01\x3a", PrefixLen: 24} nic1Gateway := testutil.MustParse4("192.168.1.1") // Local subnet on NIC2: 10.10.10.5/24, gateway 10.10.10.1. - nic2Addr := tcpip.AddressWithPrefix{"\x0a\x0a\x0a\x05", 24} + nic2Addr := tcpip.AddressWithPrefix{Address: "\x0a\x0a\x0a\x05", PrefixLen: 24} nic2Gateway := testutil.MustParse4("10.10.10.1") // Create a new stack with two NICs. @@ -1664,12 +1656,12 @@ func TestOutgoingBroadcastWithRouteTable(t *testing.T) { if err := s.CreateNIC(2, ep); err != nil { t.Fatalf("CreateNIC failed: %s", err) } - nic1ProtoAddr := tcpip.ProtocolAddress{fakeNetNumber, nic1Addr} + nic1ProtoAddr := tcpip.ProtocolAddress{Protocol: fakeNetNumber, AddressWithPrefix: nic1Addr} if err := s.AddProtocolAddress(1, nic1ProtoAddr); err != nil { t.Fatalf("AddProtocolAddress(1, %v) failed: %v", nic1ProtoAddr, err) } - nic2ProtoAddr := tcpip.ProtocolAddress{fakeNetNumber, nic2Addr} + nic2ProtoAddr := tcpip.ProtocolAddress{Protocol: fakeNetNumber, AddressWithPrefix: nic2Addr} if err := s.AddProtocolAddress(2, nic2ProtoAddr); err != nil { t.Fatalf("AddAddress(2, %v) failed: %v", nic2ProtoAddr, err) } @@ -1713,7 +1705,7 @@ func TestOutgoingBroadcastWithRouteTable(t *testing.T) { // 2. Case: Having an explicit route for broadcast will select that one. rt = append( []tcpip.Route{ - {Destination: tcpip.AddressWithPrefix{header.IPv4Broadcast, 8 * header.IPv4AddressSize}.Subnet(), NIC: 1}, + {Destination: tcpip.AddressWithPrefix{Address: header.IPv4Broadcast, PrefixLen: 8 * header.IPv4AddressSize}.Subnet(), NIC: 1}, }, rt..., ) @@ -2053,7 +2045,7 @@ func TestAddAddress(t *testing.T) { } expectedAddresses = append(expectedAddresses, tcpip.ProtocolAddress{ Protocol: fakeNetNumber, - AddressWithPrefix: tcpip.AddressWithPrefix{address, fakeDefaultPrefixLen}, + AddressWithPrefix: tcpip.AddressWithPrefix{Address: address, PrefixLen: fakeDefaultPrefixLen}, }) } @@ -2117,7 +2109,7 @@ func TestAddAddressWithOptions(t *testing.T) { } expectedAddresses = append(expectedAddresses, tcpip.ProtocolAddress{ Protocol: fakeNetNumber, - AddressWithPrefix: tcpip.AddressWithPrefix{address, fakeDefaultPrefixLen}, + AddressWithPrefix: tcpip.AddressWithPrefix{Address: address, PrefixLen: fakeDefaultPrefixLen}, }) } } @@ -2238,7 +2230,7 @@ func TestCreateNICWithOptions(t *testing.T) { for _, test := range tests { t.Run(test.desc, func(t *testing.T) { s := stack.New(stack.Options{}) - ep := channel.New(0, 0, tcpip.LinkAddress("\x00\x00\x00\x00\x00\x00")) + ep := channel.New(0, 0, "\x00\x00\x00\x00\x00\x00") for _, call := range test.calls { if got, want := s.CreateNICWithOptions(call.nicID, ep, call.opts), call.err; got != want { t.Fatalf("CreateNICWithOptions(%v, _, %+v) = %v, want %v", call.nicID, call.opts, got, want) @@ -2252,46 +2244,87 @@ func TestNICStats(t *testing.T) { s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{fakeNetFactory}, }) - ep1 := channel.New(10, defaultMTU, "") - if err := s.CreateNIC(1, ep1); err != nil { - t.Fatal("CreateNIC failed: ", err) - } - if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil { - t.Fatal("AddAddress failed:", err) + + nics := []struct { + addr tcpip.Address + txByteCount int + rxByteCount int + }{ + { + addr: "\x01", + txByteCount: 30, + rxByteCount: 10, + }, + { + addr: "\x02", + txByteCount: 50, + rxByteCount: 20, + }, } - // Route all packets for address \x01 to NIC 1. - { - subnet, err := tcpip.NewSubnet("\x01", "\xff") - if err != nil { - t.Fatal(err) + + var txBytesTotal, rxBytesTotal, txPacketsTotal, rxPacketsTotal int + for i, nic := range nics { + nicid := tcpip.NICID(i) + ep := channel.New(1, defaultMTU, "") + if err := s.CreateNIC(nicid, ep); err != nil { + t.Fatal("CreateNIC failed: ", err) + } + if err := s.AddAddress(nicid, fakeNetNumber, nic.addr); err != nil { + t.Fatal("AddAddress failed:", err) } - s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}}) - } - // Send a packet to address 1. - buf := buffer.NewView(30) - ep1.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{ - Data: buf.ToVectorisedView(), - })) - if got, want := s.NICInfo()[1].Stats.Rx.Packets.Value(), uint64(1); got != want { - t.Errorf("got Rx.Packets.Value() = %d, want = %d", got, want) - } + { + subnet, err := tcpip.NewSubnet(nic.addr, "\xff") + if err != nil { + t.Fatal(err) + } + s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: nicid}}) + } - if got, want := s.NICInfo()[1].Stats.Rx.Bytes.Value(), uint64(len(buf)); got != want { - t.Errorf("got Rx.Bytes.Value() = %d, want = %d", got, want) + nicStats := s.NICInfo()[nicid].Stats + + // Inbound packet. + rxBuffer := buffer.NewView(nic.rxByteCount) + ep.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{ + Data: rxBuffer.ToVectorisedView(), + })) + if got, want := nicStats.Rx.Packets.Value(), uint64(1); got != want { + t.Errorf("got Rx.Packets.Value() = %d, want = %d", got, want) + } + if got, want := nicStats.Rx.Bytes.Value(), uint64(nic.rxByteCount); got != want { + t.Errorf("got Rx.Bytes.Value() = %d, want = %d", got, want) + } + rxPacketsTotal++ + rxBytesTotal += nic.rxByteCount + + // Outbound packet. + txBuffer := buffer.NewView(nic.txByteCount) + actualTxLength := nic.txByteCount + fakeNetHeaderLen + if err := sendTo(s, nic.addr, txBuffer); err != nil { + t.Fatal("sendTo failed: ", err) + } + want := ep.Drain() + if got := nicStats.Tx.Packets.Value(); got != uint64(want) { + t.Errorf("got Tx.Packets.Value() = %d, ep.Drain() = %d", got, want) + } + if got, want := nicStats.Tx.Bytes.Value(), uint64(actualTxLength); got != want { + t.Errorf("got Tx.Bytes.Value() = %d, want = %d", got, want) + } + txPacketsTotal += want + txBytesTotal += actualTxLength } - payload := buffer.NewView(10) - // Write a packet out via the address for NIC 1 - if err := sendTo(s, "\x01", payload); err != nil { - t.Fatal("sendTo failed: ", err) + // Now verify that each NIC stats was correctly aggregated at the stack level. + if got, want := s.Stats().NICs.Rx.Packets.Value(), uint64(rxPacketsTotal); got != want { + t.Errorf("got s.Stats().NIC.Rx.Packets.Value() = %d, want = %d", got, want) } - want := uint64(ep1.Drain()) - if got := s.NICInfo()[1].Stats.Tx.Packets.Value(); got != want { - t.Errorf("got Tx.Packets.Value() = %d, ep1.Drain() = %d", got, want) + if got, want := s.Stats().NICs.Rx.Bytes.Value(), uint64(rxBytesTotal); got != want { + t.Errorf("got s.Stats().Rx.Bytes.Value() = %d, want = %d", got, want) } - - if got, want := s.NICInfo()[1].Stats.Tx.Bytes.Value(), uint64(len(payload)+fakeNetHeaderLen); got != want { + if got, want := s.Stats().NICs.Tx.Packets.Value(), uint64(txPacketsTotal); got != want { + t.Errorf("got Tx.Packets.Value() = %d, ep.Drain() = %d", got, want) + } + if got, want := s.Stats().NICs.Tx.Bytes.Value(), uint64(txBytesTotal); got != want { t.Errorf("got Tx.Bytes.Value() = %d, want = %d", got, want) } } @@ -2320,7 +2353,7 @@ func TestNICContextPreservation(t *testing.T) { t.Run(test.name, func(t *testing.T) { s := stack.New(stack.Options{}) id := tcpip.NICID(1) - ep := channel.New(0, 0, tcpip.LinkAddress("\x00\x00\x00\x00\x00\x00")) + ep := channel.New(0, 0, "\x00\x00\x00\x00\x00\x00") if err := s.CreateNICWithOptions(id, ep, test.opts); err != nil { t.Fatalf("got stack.CreateNICWithOptions(%d, %+v, %+v) = %s, want nil", id, ep, test.opts, err) } @@ -2607,15 +2640,17 @@ func TestNICAutoGenAddrDoesDAD(t *testing.T) { const nicID = 1 ndpDisp := ndpDispatcher{ - dadC: make(chan ndpDADEvent), + dadC: make(chan ndpDADEvent, 1), } dadConfigs := stack.DefaultDADConfigurations() + clock := faketime.NewManualClock() opts := stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ AutoGenLinkLocal: true, NDPDisp: &ndpDisp, DADConfigs: dadConfigs, })}, + Clock: clock, } e := channel.New(int(dadConfigs.DupAddrDetectTransmits), 1280, linkAddr1) @@ -2633,17 +2668,18 @@ func TestNICAutoGenAddrDoesDAD(t *testing.T) { linkLocalAddr := header.LinkLocalAddr(linkAddr1) // Wait for DAD to resolve. + clock.Advance(time.Duration(dadConfigs.DupAddrDetectTransmits) * dadConfigs.RetransmitTimer) select { - case <-time.After(time.Duration(dadConfigs.DupAddrDetectTransmits)*dadConfigs.RetransmitTimer + time.Second): + case e := <-ndpDisp.dadC: + if diff := checkDADEvent(e, nicID, linkLocalAddr, &stack.DADSucceeded{}); diff != "" { + t.Errorf("dad event mismatch (-want +got):\n%s", diff) + } + default: // We should get a resolution event after 1s (default time to // resolve as per default NDP configurations). Waiting for that // resolution time + an extra 1s without a resolution event // means something is wrong. t.Fatal("timed out waiting for DAD resolution") - case e := <-ndpDisp.dadC: - if diff := checkDADEvent(e, nicID, linkLocalAddr, &stack.DADSucceeded{}); diff != "" { - t.Errorf("dad event mismatch (-want +got):\n%s", diff) - } } if err := checkGetMainNICAddress(s, nicID, header.IPv6ProtocolNumber, tcpip.AddressWithPrefix{Address: linkLocalAddr, PrefixLen: header.IPv6LinkLocalPrefix.PrefixLen}); err != nil { t.Fatal(err) @@ -3274,8 +3310,9 @@ func TestDoDADWhenNICEnabled(t *testing.T) { const nicID = 1 ndpDisp := ndpDispatcher{ - dadC: make(chan ndpDADEvent), + dadC: make(chan ndpDADEvent, 1), } + clock := faketime.NewManualClock() opts := stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ DADConfigs: stack.DADConfigurations{ @@ -3284,6 +3321,7 @@ func TestDoDADWhenNICEnabled(t *testing.T) { }, NDPDisp: &ndpDisp, })}, + Clock: clock, } e := channel.New(dadTransmits, 1280, linkAddr1) @@ -3328,13 +3366,14 @@ func TestDoDADWhenNICEnabled(t *testing.T) { } // Wait for DAD to resolve. + clock.Advance(dadTransmits * retransmitTimer) select { - case <-time.After(dadTransmits*retransmitTimer + defaultAsyncPositiveEventTimeout): - t.Fatal("timed out waiting for DAD resolution") case e := <-ndpDisp.dadC: if diff := checkDADEvent(e, nicID, addr.AddressWithPrefix.Address, &stack.DADSucceeded{}); diff != "" { t.Errorf("dad event mismatch (-want +got):\n%s", diff) } + default: + t.Fatal("timed out waiting for DAD resolution") } if addrs := s.AllAddresses()[nicID]; !containsV6Addr(addrs, addr.AddressWithPrefix) { t.Fatalf("got s.AllAddresses()[%d] = %+v, want = %+v", nicID, addrs, addr) @@ -3841,8 +3880,6 @@ func TestGetMainNICAddressWhenNICDisabled(t *testing.T) { // TestAddRoute tests Stack.AddRoute func TestAddRoute(t *testing.T) { - const nicID = 1 - s := stack.New(stack.Options{}) subnet1, err := tcpip.NewSubnet("\x00", "\x00") @@ -3879,8 +3916,6 @@ func TestAddRoute(t *testing.T) { // TestRemoveRoutes tests Stack.RemoveRoutes func TestRemoveRoutes(t *testing.T) { - const nicID = 1 - s := stack.New(stack.Options{}) addressToRemove := tcpip.Address("\x01") @@ -4227,7 +4262,7 @@ func TestFindRouteWithForwarding(t *testing.T) { s.SetRouteTable([]tcpip.Route{{Destination: test.netCfg.remoteAddr.WithPrefix().Subnet(), NIC: nicID2}}) r, err := s.FindRoute(test.addrNIC, test.localAddr, test.netCfg.remoteAddr, test.netCfg.proto, false /* multicastLoop */) - if r != nil { + if err == nil { defer r.Release() } if diff := cmp.Diff(test.findRouteErr, err); diff != "" { @@ -4398,7 +4433,7 @@ func TestClearNeighborCacheOnNICDisable(t *testing.T) { if neighbors, err := s.Neighbors(nicID, addr.proto); err != nil { t.Fatalf("s.Neighbors(%d, %d): %s", nicID, addr.proto, err) } else if diff := cmp.Diff( - []stack.NeighborEntry{{Addr: addr.addr, LinkAddr: linkAddr, State: stack.Static, UpdatedAtNanos: clock.NowNanoseconds()}}, + []stack.NeighborEntry{{Addr: addr.addr, LinkAddr: linkAddr, State: stack.Static, UpdatedAt: clock.Now()}}, neighbors, ); diff != "" { t.Fatalf("proto=%d neighbors mismatch (-want +got):\n%s", addr.proto, diff) diff --git a/pkg/tcpip/stack/tcp.go b/pkg/tcpip/stack/tcp.go index ddff6e2d6..e90c1a770 100644 --- a/pkg/tcpip/stack/tcp.go +++ b/pkg/tcpip/stack/tcp.go @@ -39,7 +39,7 @@ type TCPCubicState struct { WMax float64 // T is the time when the current congestion avoidance was entered. - T time.Time `state:".(unixTime)"` + T tcpip.MonotonicTime // TimeSinceLastCongestion denotes the time since the current // congestion avoidance was entered. @@ -78,7 +78,7 @@ type TCPCubicState struct { type TCPRACKState struct { // XmitTime is the transmission timestamp of the most recent // acknowledged segment. - XmitTime time.Time `state:".(unixTime)"` + XmitTime tcpip.MonotonicTime // EndSequence is the ending TCP sequence number of the most recent // acknowledged segment. @@ -216,7 +216,7 @@ type TCPRTTState struct { // +stateify savable type TCPSenderState struct { // LastSendTime is the timestamp at which we sent the last segment. - LastSendTime time.Time `state:".(unixTime)"` + LastSendTime tcpip.MonotonicTime // DupAckCount is the number of Duplicate ACKs received. It is used for // fast retransmit. @@ -256,7 +256,7 @@ type TCPSenderState struct { RTTMeasureSeqNum seqnum.Value // RTTMeasureTime is the time when the RTTMeasureSeqNum was sent. - RTTMeasureTime time.Time `state:".(unixTime)"` + RTTMeasureTime tcpip.MonotonicTime // Closed indicates that the caller has closed the endpoint for // sending. @@ -313,7 +313,7 @@ type TCPSACKInfo struct { type RcvBufAutoTuneParams struct { // MeasureTime is the time at which the current measurement was // started. - MeasureTime time.Time `state:".(unixTime)"` + MeasureTime tcpip.MonotonicTime // CopiedBytes is the number of bytes copied to user space since this // measure began. @@ -341,7 +341,7 @@ type RcvBufAutoTuneParams struct { // RTTMeasureTime is the absolute time at which the current RTT // measurement period began. - RTTMeasureTime time.Time `state:".(unixTime)"` + RTTMeasureTime tcpip.MonotonicTime // Disabled is true if an explicit receive buffer is set for the // endpoint. @@ -429,7 +429,7 @@ type TCPEndpointState struct { ID TCPEndpointID // SegTime denotes the absolute time when this segment was received. - SegTime time.Time `state:".(unixTime)"` + SegTime tcpip.MonotonicTime // RcvBufState contains information about the state of the endpoint's // receive socket buffer. diff --git a/pkg/tcpip/stack/transport_demuxer.go b/pkg/tcpip/stack/transport_demuxer.go index 80ad1a9d4..8a8454a6a 100644 --- a/pkg/tcpip/stack/transport_demuxer.go +++ b/pkg/tcpip/stack/transport_demuxer.go @@ -16,8 +16,6 @@ package stack import ( "fmt" - "math/rand" - "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/hash/jenkins" @@ -223,7 +221,7 @@ func (epsByNIC *endpointsByNIC) registerEndpoint(d *transportDemuxer, netProto t return multiPortEp.singleRegisterEndpoint(t, flags) } -func (epsByNIC *endpointsByNIC) checkEndpoint(d *transportDemuxer, netProto tcpip.NetworkProtocolNumber, transProto tcpip.TransportProtocolNumber, flags ports.Flags, bindToDevice tcpip.NICID) tcpip.Error { +func (epsByNIC *endpointsByNIC) checkEndpoint(flags ports.Flags, bindToDevice tcpip.NICID) tcpip.Error { epsByNIC.mu.RLock() defer epsByNIC.mu.RUnlock() @@ -475,7 +473,7 @@ func (d *transportDemuxer) singleRegisterEndpoint(netProto tcpip.NetworkProtocol if !ok { epsByNIC = &endpointsByNIC{ endpoints: make(map[tcpip.NICID]*multiPortEndpoint), - seed: rand.Uint32(), + seed: d.stack.Seed(), } eps.endpoints[id] = epsByNIC } @@ -502,7 +500,7 @@ func (d *transportDemuxer) singleCheckEndpoint(netProto tcpip.NetworkProtocolNum return nil } - return epsByNIC.checkEndpoint(d, netProto, protocol, flags, bindToDevice) + return epsByNIC.checkEndpoint(flags, bindToDevice) } // unregisterEndpoint unregisters the endpoint with the given id such that it diff --git a/pkg/tcpip/stack/transport_demuxer_test.go b/pkg/tcpip/stack/transport_demuxer_test.go index 4848495c9..0972c94de 100644 --- a/pkg/tcpip/stack/transport_demuxer_test.go +++ b/pkg/tcpip/stack/transport_demuxer_test.go @@ -18,6 +18,7 @@ import ( "io/ioutil" "math" "math/rand" + "strconv" "testing" "gvisor.dev/gvisor/pkg/tcpip" @@ -84,7 +85,8 @@ func newDualTestContextMultiNIC(t *testing.T, mtu uint32, linkEpIDs []tcpip.NICI } type headers struct { - srcPort, dstPort uint16 + srcPort uint16 + dstPort uint16 } func newPayload() []byte { @@ -208,7 +210,7 @@ func TestBindToDeviceDistribution(t *testing.T) { reuse bool bindToDevice tcpip.NICID } - for _, test := range []struct { + tcs := []struct { name string // endpoints will received the inject packets. endpoints []endpointSockopts @@ -217,29 +219,29 @@ func TestBindToDeviceDistribution(t *testing.T) { wantDistributions map[tcpip.NICID][]float64 }{ { - "BindPortReuse", + name: "BindPortReuse", // 5 endpoints that all have reuse set. - []endpointSockopts{ + endpoints: []endpointSockopts{ {reuse: true, bindToDevice: 0}, {reuse: true, bindToDevice: 0}, {reuse: true, bindToDevice: 0}, {reuse: true, bindToDevice: 0}, {reuse: true, bindToDevice: 0}, }, - map[tcpip.NICID][]float64{ + wantDistributions: map[tcpip.NICID][]float64{ // Injected packets on dev0 get distributed evenly. 1: {0.2, 0.2, 0.2, 0.2, 0.2}, }, }, { - "BindToDevice", + name: "BindToDevice", // 3 endpoints with various bindings. - []endpointSockopts{ + endpoints: []endpointSockopts{ {reuse: false, bindToDevice: 1}, {reuse: false, bindToDevice: 2}, {reuse: false, bindToDevice: 3}, }, - map[tcpip.NICID][]float64{ + wantDistributions: map[tcpip.NICID][]float64{ // Injected packets on dev0 go only to the endpoint bound to dev0. 1: {1, 0, 0}, // Injected packets on dev1 go only to the endpoint bound to dev1. @@ -249,9 +251,9 @@ func TestBindToDeviceDistribution(t *testing.T) { }, }, { - "ReuseAndBindToDevice", + name: "ReuseAndBindToDevice", // 6 endpoints with various bindings. - []endpointSockopts{ + endpoints: []endpointSockopts{ {reuse: true, bindToDevice: 1}, {reuse: true, bindToDevice: 1}, {reuse: true, bindToDevice: 2}, @@ -259,7 +261,7 @@ func TestBindToDeviceDistribution(t *testing.T) { {reuse: true, bindToDevice: 2}, {reuse: true, bindToDevice: 0}, }, - map[tcpip.NICID][]float64{ + wantDistributions: map[tcpip.NICID][]float64{ // Injected packets on dev0 get distributed among endpoints bound to // dev0. 1: {0.5, 0.5, 0, 0, 0, 0}, @@ -270,35 +272,42 @@ func TestBindToDeviceDistribution(t *testing.T) { 1000: {0, 0, 0, 0, 0, 1}, }, }, - } { - for protoName, netProtoNum := range map[string]tcpip.NetworkProtocolNumber{ - "IPv4": ipv4.ProtocolNumber, - "IPv6": ipv6.ProtocolNumber, - } { + } + protos := map[string]tcpip.NetworkProtocolNumber{ + "IPv4": ipv4.ProtocolNumber, + "IPv6": ipv6.ProtocolNumber, + } + + for _, test := range tcs { + for protoName, protoNum := range protos { for device, wantDistribution := range test.wantDistributions { - t.Run(test.name+protoName+string(device), func(t *testing.T) { + t.Run(test.name+protoName+"-"+strconv.Itoa(int(device)), func(t *testing.T) { + // Create the NICs. var devices []tcpip.NICID for d := range test.wantDistributions { devices = append(devices, d) } c := newDualTestContextMultiNIC(t, defaultMTU, devices) + // Create endpoints and bind each to a NIC, sometimes reusing ports. eps := make(map[tcpip.Endpoint]int) - pollChannel := make(chan tcpip.Endpoint) for i, endpoint := range test.endpoints { // Try to receive the data. wq := waiter.Queue{} we, ch := waiter.NewChannelEntry(nil) wq.EventRegister(&we, waiter.ReadableEvents) - defer wq.EventUnregister(&we) - defer close(ch) + t.Cleanup(func() { + wq.EventUnregister(&we) + close(ch) + }) var err tcpip.Error - ep, err := c.s.NewEndpoint(udp.ProtocolNumber, netProtoNum, &wq) + ep, err := c.s.NewEndpoint(udp.ProtocolNumber, protoNum, &wq) if err != nil { t.Fatalf("NewEndpoint failed: %s", err) } + t.Cleanup(ep.Close) eps[ep] = i go func(ep tcpip.Endpoint) { @@ -307,32 +316,34 @@ func TestBindToDeviceDistribution(t *testing.T) { } }(ep) - defer ep.Close() ep.SocketOptions().SetReusePort(endpoint.reuse) if err := ep.SocketOptions().SetBindToDevice(int32(endpoint.bindToDevice)); err != nil { t.Fatalf("SetSockOpt(&%T(%d)) on endpoint %d failed: %s", endpoint.bindToDevice, endpoint.bindToDevice, i, err) } var dstAddr tcpip.Address - switch netProtoNum { + switch protoNum { case ipv4.ProtocolNumber: dstAddr = testDstAddrV4 case ipv6.ProtocolNumber: dstAddr = testDstAddrV6 default: - t.Fatalf("unexpected protocol number: %d", netProtoNum) + t.Fatalf("unexpected protocol number: %d", protoNum) } if err := ep.Bind(tcpip.FullAddress{Addr: dstAddr, Port: testDstPort}); err != nil { t.Fatalf("ep.Bind(...) on endpoint %d failed: %s", i, err) } } - npackets := 100000 - nports := 10000 + // Send packets across a range of ports, checking that packets from + // the same source port are always demultiplexed to the same + // destination endpoint. + npackets := 10_000 + nports := 1_000 if got, want := len(test.endpoints), len(wantDistribution); got != want { t.Fatalf("got len(test.endpoints) = %d, want %d", got, want) } - ports := make(map[uint16]tcpip.Endpoint) + endpoints := make(map[uint16]tcpip.Endpoint) stats := make(map[tcpip.Endpoint]int) for i := 0; i < npackets; i++ { // Send a packet. @@ -342,13 +353,13 @@ func TestBindToDeviceDistribution(t *testing.T) { srcPort: testSrcPort + port, dstPort: testDstPort, } - switch netProtoNum { + switch protoNum { case ipv4.ProtocolNumber: c.sendV4Packet(payload, hdrs, device) case ipv6.ProtocolNumber: c.sendV6Packet(payload, hdrs, device) default: - t.Fatalf("unexpected protocol number: %d", netProtoNum) + t.Fatalf("unexpected protocol number: %d", protoNum) } ep := <-pollChannel @@ -357,11 +368,11 @@ func TestBindToDeviceDistribution(t *testing.T) { } stats[ep]++ if i < nports { - ports[uint16(i)] = ep + endpoints[uint16(i)] = ep } else { // Check that all packets from one client are handled by the same // socket. - if want, got := ports[port], ep; want != got { + if want, got := endpoints[port], ep; want != got { t.Fatalf("Packet sent on port %d expected on endpoint %d but received on endpoint %d", port, eps[want], eps[got]) } } diff --git a/pkg/tcpip/stdclock.go b/pkg/tcpip/stdclock.go index 7ce43a68e..371da2f40 100644 --- a/pkg/tcpip/stdclock.go +++ b/pkg/tcpip/stdclock.go @@ -60,11 +60,11 @@ type stdClock struct { // monotonicOffset is assigned maxMonotonic after restore so that the // monotonic time will continue from where it "left off" before saving as part // of S/R. - monotonicOffset int64 `state:"nosave"` + monotonicOffset MonotonicTime `state:"nosave"` // monotonicMU protects maxMonotonic. monotonicMU sync.Mutex `state:"nosave"` - maxMonotonic int64 + maxMonotonic MonotonicTime } // NewStdClock returns an instance of a clock that uses the time package. @@ -76,25 +76,25 @@ func NewStdClock() Clock { var _ Clock = (*stdClock)(nil) -// NowNanoseconds implements Clock.NowNanoseconds. -func (*stdClock) NowNanoseconds() int64 { - return time.Now().UnixNano() +// Now implements Clock.Now. +func (*stdClock) Now() time.Time { + return time.Now() } // NowMonotonic implements Clock.NowMonotonic. -func (s *stdClock) NowMonotonic() int64 { +func (s *stdClock) NowMonotonic() MonotonicTime { sinceBase := time.Since(s.baseTime) if sinceBase < 0 { panic(fmt.Sprintf("got negative duration = %s since base time = %s", sinceBase, s.baseTime)) } - monotonicValue := sinceBase.Nanoseconds() + s.monotonicOffset + monotonicValue := s.monotonicOffset.Add(sinceBase) s.monotonicMU.Lock() defer s.monotonicMU.Unlock() // Monotonic time values must never decrease. - if monotonicValue > s.maxMonotonic { + if s.maxMonotonic.Before(monotonicValue) { s.maxMonotonic = monotonicValue } diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go index 797778e08..8f2658f64 100644 --- a/pkg/tcpip/tcpip.go +++ b/pkg/tcpip/tcpip.go @@ -64,17 +64,47 @@ func (e *ErrSaveRejection) Error() string { return "save rejected due to unsupported networking state: " + e.Err.Error() } +// MonotonicTime is a monotonic clock reading. +// +// +stateify savable +type MonotonicTime struct { + nanoseconds int64 +} + +// Before reports whether the monotonic clock reading mt is before u. +func (mt MonotonicTime) Before(u MonotonicTime) bool { + return mt.nanoseconds < u.nanoseconds +} + +// After reports whether the monotonic clock reading mt is after u. +func (mt MonotonicTime) After(u MonotonicTime) bool { + return mt.nanoseconds > u.nanoseconds +} + +// Add returns the monotonic clock reading mt+d. +func (mt MonotonicTime) Add(d time.Duration) MonotonicTime { + return MonotonicTime{ + nanoseconds: time.Unix(0, mt.nanoseconds).Add(d).Sub(time.Unix(0, 0)).Nanoseconds(), + } +} + +// Sub returns the duration mt-u. If the result exceeds the maximum (or minimum) +// value that can be stored in a Duration, the maximum (or minimum) duration +// will be returned. To compute t-d for a duration d, use t.Add(-d). +func (mt MonotonicTime) Sub(u MonotonicTime) time.Duration { + return time.Unix(0, mt.nanoseconds).Sub(time.Unix(0, u.nanoseconds)) +} + // A Clock provides the current time and schedules work for execution. // // Times returned by a Clock should always be used for application-visible // time. Only monotonic times should be used for netstack internal timekeeping. type Clock interface { - // NowNanoseconds returns the current real time as a number of - // nanoseconds since the Unix epoch. - NowNanoseconds() int64 + // Now returns the current local time. + Now() time.Time - // NowMonotonic returns a monotonic time value at nanosecond resolution. - NowMonotonic() int64 + // NowMonotonic returns the current monotonic clock reading. + NowMonotonic() MonotonicTime // AfterFunc waits for the duration to elapse and then calls f in its own // goroutine. It returns a Timer that can be used to cancel the call using @@ -435,11 +465,11 @@ type ControlMessages struct { // PacketOwner is used to get UID and GID of the packet. type PacketOwner interface { - // UID returns UID of the packet. - UID() uint32 + // UID returns KUID of the packet. + KUID() uint32 - // GID returns GID of the packet. - GID() uint32 + // GID returns KGID of the packet. + KGID() uint32 } // ReadOptions contains options for Endpoint.Read. @@ -861,6 +891,9 @@ type SettableSocketOption interface { isSettableSocketOption() } +// EndpointState represents the state of an endpoint. +type EndpointState uint8 + // CongestionControlState indicates the current congestion control state for // TCP sender. type CongestionControlState int @@ -897,6 +930,9 @@ type TCPInfoOption struct { // RTO is the retransmission timeout for the endpoint. RTO time.Duration + // State is the current endpoint protocol state. + State EndpointState + // CcState is the congestion control state. CcState CongestionControlState @@ -1552,6 +1588,10 @@ type IPForwardingStats struct { // were too big for the outgoing MTU. PacketTooBig *StatCounter + // HostUnreachable is the number of IP packets received which could not be + // successfully forwarded due to an unresolvable next hop. + HostUnreachable *StatCounter + // ExtensionHeaderProblem is the number of IP packets which were dropped // because of a problem encountered when processing an IPv6 extension // header. @@ -1835,37 +1875,104 @@ type UDPStats struct { ChecksumErrors *StatCounter } +// NICNeighborStats holds metrics for the neighbor table. +type NICNeighborStats struct { + // LINT.IfChange(NICNeighborStats) + + // UnreachableEntryLookups counts the number of lookups performed on an + // entry in Unreachable state. + UnreachableEntryLookups *StatCounter + + // LINT.ThenChange(stack/nic_stats.go:multiCounterNICNeighborStats) +} + +// NICPacketStats holds basic packet statistics. +type NICPacketStats struct { + // LINT.IfChange(NICPacketStats) + + // Packets is the number of packets counted. + Packets *StatCounter + + // Bytes is the number of bytes counted. + Bytes *StatCounter + + // LINT.ThenChange(stack/nic_stats.go:multiCounterNICPacketStats) +} + +// NICStats holds NIC statistics. +type NICStats struct { + // LINT.IfChange(NICStats) + + // UnknownL3ProtocolRcvdPackets is the number of packets received that were + // for an unknown or unsupported network protocol. + UnknownL3ProtocolRcvdPackets *StatCounter + + // UnknownL4ProtocolRcvdPackets is the number of packets received that were + // for an unknown or unsupported transport protocol. + UnknownL4ProtocolRcvdPackets *StatCounter + + // MalformedL4RcvdPackets is the number of packets received by a NIC that + // could not be delivered to a transport endpoint because the L4 header could + // not be parsed. + MalformedL4RcvdPackets *StatCounter + + // Tx contains statistics about transmitted packets. + Tx NICPacketStats + + // Rx contains statistics about received packets. + Rx NICPacketStats + + // DisabledRx contains statistics about received packets on disabled NICs. + DisabledRx NICPacketStats + + // Neighbor contains statistics about neighbor entries. + Neighbor NICNeighborStats + + // LINT.ThenChange(stack/nic_stats.go:multiCounterNICStats) +} + +// FillIn returns a copy of s with nil fields initialized to new StatCounters. +func (s NICStats) FillIn() NICStats { + InitStatCounters(reflect.ValueOf(&s).Elem()) + return s +} + // Stats holds statistics about the networking stack. -// -// All fields are optional. type Stats struct { - // UnknownProtocolRcvdPackets is the number of packets received by the - // stack that were for an unknown or unsupported protocol. - UnknownProtocolRcvdPackets *StatCounter + // TODO(https://gvisor.dev/issues/5986): Make the DroppedPackets stat less + // ambiguous. - // MalformedRcvdPackets is the number of packets received by the stack - // that were deemed malformed. - MalformedRcvdPackets *StatCounter - - // DroppedPackets is the number of packets dropped due to full queues. + // DroppedPackets is the number of packets dropped at the transport layer. DroppedPackets *StatCounter - // ICMP breaks out ICMP-specific stats (both v4 and v6). + // NICs is an aggregation of every NIC's statistics. These should not be + // incremented using this field, but using the relevant NIC multicounters. + NICs NICStats + + // ICMP is an aggregation of every NetworkEndpoint's ICMP statistics (both v4 + // and v6). These should not be incremented using this field, but using the + // relevant NetworkEndpoint ICMP multicounters. ICMP ICMPStats - // IGMP breaks out IGMP-specific stats. + // IGMP is an aggregation of every NetworkEndpoint's IGMP statistics. These + // should not be incremented using this field, but using the relevant + // NetworkEndpoint IGMP multicounters. IGMP IGMPStats - // IP breaks out IP-specific stats (both v4 and v6). + // IP is an aggregation of every NetworkEndpoint's IP statistics. These should + // not be incremented using this field, but using the relevant NetworkEndpoint + // IP multicounters. IP IPStats - // ARP breaks out ARP-specific stats. + // ARP is an aggregation of every NetworkEndpoint's ARP statistics. These + // should not be incremented using this field, but using the relevant + // NetworkEndpoint ARP multicounters. ARP ARPStats - // TCP breaks out TCP-specific stats. + // TCP holds TCP-specific stats. TCP TCPStats - // UDP breaks out UDP-specific stats. + // UDP holds UDP-specific stats. UDP UDPStats } diff --git a/pkg/tcpip/tcpip_test.go b/pkg/tcpip/tcpip_test.go index 269081ff8..c96ae2f02 100644 --- a/pkg/tcpip/tcpip_test.go +++ b/pkg/tcpip/tcpip_test.go @@ -19,7 +19,6 @@ import ( "fmt" "io" "net" - "strings" "testing" "github.com/google/go-cmp/cmp" @@ -210,26 +209,6 @@ func TestAddressString(t *testing.T) { } } -func TestStatsString(t *testing.T) { - got := fmt.Sprintf("%+v", Stats{}.FillIn()) - - matchers := []string{ - // Print root-level stats correctly. - "UnknownProtocolRcvdPackets:0", - // Print protocol-specific stats correctly. - "TCP:{ActiveConnectionOpenings:0", - } - - for _, m := range matchers { - if !strings.Contains(got, m) { - t.Errorf("string.Contains(got, %q) = false", m) - } - } - if t.Failed() { - t.Logf(`got = fmt.Sprintf("%%+v", Stats{}.FillIn()) = %q`, got) - } -} - func TestAddressWithPrefixSubnet(t *testing.T) { tests := []struct { addr Address diff --git a/pkg/tcpip/tests/integration/BUILD b/pkg/tcpip/tests/integration/BUILD index ab2dab60c..181ef799e 100644 --- a/pkg/tcpip/tests/integration/BUILD +++ b/pkg/tcpip/tests/integration/BUILD @@ -53,12 +53,14 @@ go_test( "//pkg/tcpip/checker", "//pkg/tcpip/faketime", "//pkg/tcpip/header", + "//pkg/tcpip/link/channel", "//pkg/tcpip/link/pipe", "//pkg/tcpip/network/arp", "//pkg/tcpip/network/ipv4", "//pkg/tcpip/network/ipv6", "//pkg/tcpip/stack", "//pkg/tcpip/tests/utils", + "//pkg/tcpip/testutil", "//pkg/tcpip/transport/icmp", "//pkg/tcpip/transport/tcp", "//pkg/tcpip/transport/udp", diff --git a/pkg/tcpip/tests/integration/forward_test.go b/pkg/tcpip/tests/integration/forward_test.go index 42bc53328..92fa6257d 100644 --- a/pkg/tcpip/tests/integration/forward_test.go +++ b/pkg/tcpip/tests/integration/forward_test.go @@ -16,6 +16,7 @@ package forward_test import ( "bytes" + "fmt" "testing" "github.com/google/go-cmp/cmp" @@ -34,6 +35,39 @@ import ( "gvisor.dev/gvisor/pkg/waiter" ) +const ttl = 64 + +var ( + ipv4GlobalMulticastAddr = testutil.MustParse4("224.0.1.10") + ipv6GlobalMulticastAddr = testutil.MustParse6("ff0e::a") +) + +func rxICMPv4EchoRequest(e *channel.Endpoint, src, dst tcpip.Address) { + utils.RxICMPv4EchoRequest(e, src, dst, ttl) +} + +func rxICMPv6EchoRequest(e *channel.Endpoint, src, dst tcpip.Address) { + utils.RxICMPv6EchoRequest(e, src, dst, ttl) +} + +func forwardedICMPv4EchoRequestChecker(t *testing.T, b []byte, src, dst tcpip.Address) { + checker.IPv4(t, b, + checker.SrcAddr(src), + checker.DstAddr(dst), + checker.TTL(ttl-1), + checker.ICMPv4( + checker.ICMPv4Type(header.ICMPv4Echo))) +} + +func forwardedICMPv6EchoRequestChecker(t *testing.T, b []byte, src, dst tcpip.Address) { + checker.IPv6(t, b, + checker.SrcAddr(src), + checker.DstAddr(dst), + checker.TTL(ttl-1), + checker.ICMPv6( + checker.ICMPv6Type(header.ICMPv6EchoRequest))) +} + func TestForwarding(t *testing.T) { const listenPort = 8080 @@ -320,45 +354,16 @@ func TestMulticastForwarding(t *testing.T) { const ( nicID1 = 1 nicID2 = 2 - ttl = 64 ) var ( ipv4LinkLocalUnicastAddr = testutil.MustParse4("169.254.0.10") ipv4LinkLocalMulticastAddr = testutil.MustParse4("224.0.0.10") - ipv4GlobalMulticastAddr = testutil.MustParse4("224.0.1.10") ipv6LinkLocalUnicastAddr = testutil.MustParse6("fe80::a") ipv6LinkLocalMulticastAddr = testutil.MustParse6("ff02::a") - ipv6GlobalMulticastAddr = testutil.MustParse6("ff0e::a") ) - rxICMPv4EchoRequest := func(e *channel.Endpoint, src, dst tcpip.Address) { - utils.RxICMPv4EchoRequest(e, src, dst, ttl) - } - - rxICMPv6EchoRequest := func(e *channel.Endpoint, src, dst tcpip.Address) { - utils.RxICMPv6EchoRequest(e, src, dst, ttl) - } - - v4Checker := func(t *testing.T, b []byte, src, dst tcpip.Address) { - checker.IPv4(t, b, - checker.SrcAddr(src), - checker.DstAddr(dst), - checker.TTL(ttl-1), - checker.ICMPv4( - checker.ICMPv4Type(header.ICMPv4Echo))) - } - - v6Checker := func(t *testing.T, b []byte, src, dst tcpip.Address) { - checker.IPv6(t, b, - checker.SrcAddr(src), - checker.DstAddr(dst), - checker.TTL(ttl-1), - checker.ICMPv6( - checker.ICMPv6Type(header.ICMPv6EchoRequest))) - } - tests := []struct { name string srcAddr, dstAddr tcpip.Address @@ -394,7 +399,7 @@ func TestMulticastForwarding(t *testing.T) { rx: rxICMPv4EchoRequest, expectForward: true, checker: func(t *testing.T, b []byte) { - v4Checker(t, b, utils.RemoteIPv4Addr, utils.Ipv4Addr2.AddressWithPrefix.Address) + forwardedICMPv4EchoRequestChecker(t, b, utils.RemoteIPv4Addr, utils.Ipv4Addr2.AddressWithPrefix.Address) }, }, { @@ -404,7 +409,7 @@ func TestMulticastForwarding(t *testing.T) { rx: rxICMPv4EchoRequest, expectForward: true, checker: func(t *testing.T, b []byte) { - v4Checker(t, b, utils.RemoteIPv4Addr, ipv4GlobalMulticastAddr) + forwardedICMPv4EchoRequestChecker(t, b, utils.RemoteIPv4Addr, ipv4GlobalMulticastAddr) }, }, @@ -436,7 +441,7 @@ func TestMulticastForwarding(t *testing.T) { rx: rxICMPv6EchoRequest, expectForward: true, checker: func(t *testing.T, b []byte) { - v6Checker(t, b, utils.RemoteIPv6Addr, utils.Ipv6Addr2.AddressWithPrefix.Address) + forwardedICMPv6EchoRequestChecker(t, b, utils.RemoteIPv6Addr, utils.Ipv6Addr2.AddressWithPrefix.Address) }, }, { @@ -446,7 +451,7 @@ func TestMulticastForwarding(t *testing.T) { rx: rxICMPv6EchoRequest, expectForward: true, checker: func(t *testing.T, b []byte) { - v6Checker(t, b, utils.RemoteIPv6Addr, ipv6GlobalMulticastAddr) + forwardedICMPv6EchoRequestChecker(t, b, utils.RemoteIPv6Addr, ipv6GlobalMulticastAddr) }, }, } @@ -506,3 +511,180 @@ func TestMulticastForwarding(t *testing.T) { }) } } + +func TestPerInterfaceForwarding(t *testing.T) { + const ( + nicID1 = 1 + nicID2 = 2 + ) + + tests := []struct { + name string + srcAddr, dstAddr tcpip.Address + rx func(*channel.Endpoint, tcpip.Address, tcpip.Address) + checker func(*testing.T, []byte) + }{ + { + name: "IPv4 unicast", + srcAddr: utils.RemoteIPv4Addr, + dstAddr: utils.Ipv4Addr2.AddressWithPrefix.Address, + rx: rxICMPv4EchoRequest, + checker: func(t *testing.T, b []byte) { + forwardedICMPv4EchoRequestChecker(t, b, utils.RemoteIPv4Addr, utils.Ipv4Addr2.AddressWithPrefix.Address) + }, + }, + { + name: "IPv4 multicast", + srcAddr: utils.RemoteIPv4Addr, + dstAddr: ipv4GlobalMulticastAddr, + rx: rxICMPv4EchoRequest, + checker: func(t *testing.T, b []byte) { + forwardedICMPv4EchoRequestChecker(t, b, utils.RemoteIPv4Addr, ipv4GlobalMulticastAddr) + }, + }, + + { + name: "IPv6 unicast", + srcAddr: utils.RemoteIPv6Addr, + dstAddr: utils.Ipv6Addr2.AddressWithPrefix.Address, + rx: rxICMPv6EchoRequest, + checker: func(t *testing.T, b []byte) { + forwardedICMPv6EchoRequestChecker(t, b, utils.RemoteIPv6Addr, utils.Ipv6Addr2.AddressWithPrefix.Address) + }, + }, + { + name: "IPv6 multicast", + srcAddr: utils.RemoteIPv6Addr, + dstAddr: ipv6GlobalMulticastAddr, + rx: rxICMPv6EchoRequest, + checker: func(t *testing.T, b []byte) { + forwardedICMPv6EchoRequestChecker(t, b, utils.RemoteIPv6Addr, ipv6GlobalMulticastAddr) + }, + }, + } + + netProtos := [...]tcpip.NetworkProtocolNumber{ipv4.ProtocolNumber, ipv6.ProtocolNumber} + + for _, test := range tests { + t.Run(test.name, func(t *testing.T) { + s := stack.New(stack.Options{ + NetworkProtocols: []stack.NetworkProtocolFactory{ + // ARP is not used in this test but it is a network protocol that does + // not support forwarding. We install the protocol to make sure that + // forwarding information for a NIC is only reported for network + // protocols that support forwarding. + arp.NewProtocol, + + ipv4.NewProtocol, + ipv6.NewProtocol, + }, + TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol}, + }) + + e1 := channel.New(1, header.IPv6MinimumMTU, "") + if err := s.CreateNIC(nicID1, e1); err != nil { + t.Fatalf("s.CreateNIC(%d, _): %s", nicID1, err) + } + + e2 := channel.New(1, header.IPv6MinimumMTU, "") + if err := s.CreateNIC(nicID2, e2); err != nil { + t.Fatalf("s.CreateNIC(%d, _): %s", nicID2, err) + } + + for _, add := range [...]struct { + nicID tcpip.NICID + addr tcpip.ProtocolAddress + }{ + { + nicID: nicID1, + addr: utils.RouterNIC1IPv4Addr, + }, + { + nicID: nicID1, + addr: utils.RouterNIC1IPv6Addr, + }, + { + nicID: nicID2, + addr: utils.RouterNIC2IPv4Addr, + }, + { + nicID: nicID2, + addr: utils.RouterNIC2IPv6Addr, + }, + } { + if err := s.AddProtocolAddress(add.nicID, add.addr); err != nil { + t.Fatalf("s.AddProtocolAddress(%d, %#v): %s", add.nicID, add.addr, err) + } + } + + // Only enable forwarding on NIC1 and make sure that only packets arriving + // on NIC1 are forwarded. + for _, netProto := range netProtos { + if err := s.SetNICForwarding(nicID1, netProto, true); err != nil { + t.Fatalf("s.SetNICForwarding(%d, %d, true): %s", nicID1, netProtos, err) + } + } + + nicsInfo := s.NICInfo() + for _, subTest := range [...]struct { + nicID tcpip.NICID + nicEP *channel.Endpoint + otherNICID tcpip.NICID + otherNICEP *channel.Endpoint + expectForwarding bool + }{ + { + nicID: nicID1, + nicEP: e1, + otherNICID: nicID2, + otherNICEP: e2, + expectForwarding: true, + }, + { + nicID: nicID2, + nicEP: e2, + otherNICID: nicID2, + otherNICEP: e1, + expectForwarding: false, + }, + } { + t.Run(fmt.Sprintf("Packet arriving at NIC%d", subTest.nicID), func(t *testing.T) { + nicInfo, ok := nicsInfo[subTest.nicID] + if !ok { + t.Errorf("expected NIC info for NIC %d; got = %#v", subTest.nicID, nicsInfo) + } else { + forwarding := make(map[tcpip.NetworkProtocolNumber]bool) + for _, netProto := range netProtos { + forwarding[netProto] = subTest.expectForwarding + } + + if diff := cmp.Diff(forwarding, nicInfo.Forwarding); diff != "" { + t.Errorf("nicsInfo[%d].Forwarding mismatch (-want +got):\n%s", subTest.nicID, diff) + } + } + + s.SetRouteTable([]tcpip.Route{ + { + Destination: header.IPv4EmptySubnet, + NIC: subTest.otherNICID, + }, + { + Destination: header.IPv6EmptySubnet, + NIC: subTest.otherNICID, + }, + }) + + test.rx(subTest.nicEP, test.srcAddr, test.dstAddr) + if p, ok := subTest.nicEP.Read(); ok { + t.Errorf("unexpectedly got a response from the interface the packet arrived on: %#v", p) + } + if p, ok := subTest.otherNICEP.Read(); ok != subTest.expectForwarding { + t.Errorf("got otherNICEP.Read() = (%#v, %t), want = (_, %t)", p, ok, subTest.expectForwarding) + } else if subTest.expectForwarding { + test.checker(t, stack.PayloadSince(p.Pkt.NetworkHeader())) + } + }) + } + }) + } +} diff --git a/pkg/tcpip/tests/integration/iptables_test.go b/pkg/tcpip/tests/integration/iptables_test.go index 07ba2b837..f9ab7d0af 100644 --- a/pkg/tcpip/tests/integration/iptables_test.go +++ b/pkg/tcpip/tests/integration/iptables_test.go @@ -166,7 +166,7 @@ func TestIPTablesStatsForInput(t *testing.T) { // Make sure the packet is not dropped by the next rule. filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{} if err := ipt.ReplaceTable(stack.FilterID, filter, true /* ipv6 */); err != nil { - t.Fatalf("ipt.RelaceTable(%d, _, %t): %s", stack.FilterID, true, err) + t.Fatalf("ipt.ReplaceTable(%d, _, %t): %s", stack.FilterID, true, err) } }, genPacket: genPacketV6, @@ -187,7 +187,7 @@ func TestIPTablesStatsForInput(t *testing.T) { filter.Rules[ruleIdx].Matchers = []stack.Matcher{&inputIfNameMatcher{nicName}} filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{} if err := ipt.ReplaceTable(stack.FilterID, filter, false /* ipv6 */); err != nil { - t.Fatalf("ipt.RelaceTable(%d, _, %t): %s", stack.FilterID, false, err) + t.Fatalf("ipt.ReplaceTable(%d, _, %t): %s", stack.FilterID, false, err) } }, genPacket: genPacketV4, @@ -207,7 +207,7 @@ func TestIPTablesStatsForInput(t *testing.T) { filter.Rules[ruleIdx].Target = &stack.DropTarget{} filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{} if err := ipt.ReplaceTable(stack.FilterID, filter, true /* ipv6 */); err != nil { - t.Fatalf("ipt.RelaceTable(%d, _, %t): %s", stack.FilterID, true, err) + t.Fatalf("ipt.ReplaceTable(%d, _, %t): %s", stack.FilterID, true, err) } }, genPacket: genPacketV6, @@ -227,7 +227,7 @@ func TestIPTablesStatsForInput(t *testing.T) { filter.Rules[ruleIdx].Target = &stack.DropTarget{} filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{} if err := ipt.ReplaceTable(stack.FilterID, filter, false /* ipv6 */); err != nil { - t.Fatalf("ipt.RelaceTable(%d, _, %t): %s", stack.FilterID, false, err) + t.Fatalf("ipt.ReplaceTable(%d, _, %t): %s", stack.FilterID, false, err) } }, genPacket: genPacketV4, @@ -250,7 +250,7 @@ func TestIPTablesStatsForInput(t *testing.T) { filter.Rules[ruleIdx].Target = &stack.DropTarget{} filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{} if err := ipt.ReplaceTable(stack.FilterID, filter, true /* ipv6 */); err != nil { - t.Fatalf("ipt.RelaceTable(%d, _, %t): %s", stack.FilterID, true, err) + t.Fatalf("ipt.ReplaceTable(%d, _, %t): %s", stack.FilterID, true, err) } }, genPacket: genPacketV6, @@ -273,7 +273,7 @@ func TestIPTablesStatsForInput(t *testing.T) { filter.Rules[ruleIdx].Target = &stack.DropTarget{} filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{} if err := ipt.ReplaceTable(stack.FilterID, filter, false /* ipv6 */); err != nil { - t.Fatalf("ipt.RelaceTable(%d, _, %t): %s", stack.FilterID, false, err) + t.Fatalf("ipt.ReplaceTable(%d, _, %t): %s", stack.FilterID, false, err) } }, genPacket: genPacketV4, @@ -293,7 +293,7 @@ func TestIPTablesStatsForInput(t *testing.T) { filter.Rules[ruleIdx].Matchers = []stack.Matcher{&inputIfNameMatcher{anotherNicName}} filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{} if err := ipt.ReplaceTable(stack.FilterID, filter, true /* ipv6 */); err != nil { - t.Fatalf("ipt.RelaceTable(%d, _, %t): %s", stack.FilterID, true, err) + t.Fatalf("ipt.ReplaceTable(%d, _, %t): %s", stack.FilterID, true, err) } }, genPacket: genPacketV6, @@ -313,7 +313,7 @@ func TestIPTablesStatsForInput(t *testing.T) { filter.Rules[ruleIdx].Matchers = []stack.Matcher{&inputIfNameMatcher{anotherNicName}} filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{} if err := ipt.ReplaceTable(stack.FilterID, filter, false /* ipv6 */); err != nil { - t.Fatalf("ipt.RelaceTable(%d, _, %t): %s", stack.FilterID, false, err) + t.Fatalf("ipt.ReplaceTable(%d, _, %t): %s", stack.FilterID, false, err) } }, genPacket: genPacketV4, @@ -465,7 +465,7 @@ func TestIPTableWritePackets(t *testing.T) { } if err := s.IPTables().ReplaceTable(stack.FilterID, table, false /* ipv4 */); err != nil { - t.Fatalf("RelaceTable(%d, _, false): %s", stack.FilterID, err) + t.Fatalf("ReplaceTable(%d, _, false): %s", stack.FilterID, err) } }, genPacket: func(r *stack.Route) stack.PacketBufferList { @@ -556,7 +556,7 @@ func TestIPTableWritePackets(t *testing.T) { } if err := s.IPTables().ReplaceTable(stack.FilterID, table, true /* ipv6 */); err != nil { - t.Fatalf("RelaceTable(%d, _, true): %s", stack.FilterID, err) + t.Fatalf("ReplaceTable(%d, _, true): %s", stack.FilterID, err) } }, genPacket: func(r *stack.Route) stack.PacketBufferList { @@ -681,6 +681,32 @@ func forwardedICMPv6EchoReplyChecker(t *testing.T, b []byte, src, dst tcpip.Addr checker.ICMPv6Type(header.ICMPv6EchoReply))) } +func boolToInt(v bool) uint64 { + if v { + return 1 + } + return 0 +} + +func setupDropFilter(hook stack.Hook, f stack.IPHeaderFilter) func(*testing.T, *stack.Stack, tcpip.NetworkProtocolNumber) { + return func(t *testing.T, s *stack.Stack, netProto tcpip.NetworkProtocolNumber) { + t.Helper() + + ipv6 := netProto == ipv6.ProtocolNumber + + ipt := s.IPTables() + filter := ipt.GetTable(stack.FilterID, ipv6) + ruleIdx := filter.BuiltinChains[hook] + filter.Rules[ruleIdx].Filter = f + filter.Rules[ruleIdx].Target = &stack.DropTarget{NetworkProtocol: netProto} + // Make sure the packet is not dropped by the next rule. + filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{NetworkProtocol: netProto} + if err := ipt.ReplaceTable(stack.FilterID, filter, ipv6); err != nil { + t.Fatalf("ipt.ReplaceTable(%d, _, %t): %s", stack.FilterID, ipv6, err) + } + } +} + func TestForwardingHook(t *testing.T) { const ( nicID1 = 1 @@ -740,32 +766,6 @@ func TestForwardingHook(t *testing.T) { }, } - setupDropFilter := func(f stack.IPHeaderFilter) func(*testing.T, *stack.Stack, tcpip.NetworkProtocolNumber) { - return func(t *testing.T, s *stack.Stack, netProto tcpip.NetworkProtocolNumber) { - t.Helper() - - ipv6 := netProto == ipv6.ProtocolNumber - - ipt := s.IPTables() - filter := ipt.GetTable(stack.FilterID, ipv6) - ruleIdx := filter.BuiltinChains[stack.Forward] - filter.Rules[ruleIdx].Filter = f - filter.Rules[ruleIdx].Target = &stack.DropTarget{NetworkProtocol: netProto} - // Make sure the packet is not dropped by the next rule. - filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{NetworkProtocol: netProto} - if err := ipt.ReplaceTable(stack.FilterID, filter, ipv6); err != nil { - t.Fatalf("ipt.RelaceTable(%d, _, %t): %s", stack.FilterID, ipv6, err) - } - } - } - - boolToInt := func(v bool) uint64 { - if v { - return 1 - } - return 0 - } - subTests := []struct { name string setupFilter func(*testing.T, *stack.Stack, tcpip.NetworkProtocolNumber) @@ -779,59 +779,59 @@ func TestForwardingHook(t *testing.T) { { name: "Drop", - setupFilter: setupDropFilter(stack.IPHeaderFilter{}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{}), expectForward: false, }, { name: "Drop with input NIC filtering", - setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: nic1Name}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{InputInterface: nic1Name}), expectForward: false, }, { name: "Drop with output NIC filtering", - setupFilter: setupDropFilter(stack.IPHeaderFilter{OutputInterface: nic2Name}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{OutputInterface: nic2Name}), expectForward: false, }, { name: "Drop with input and output NIC filtering", - setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: nic1Name, OutputInterface: nic2Name}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{InputInterface: nic1Name, OutputInterface: nic2Name}), expectForward: false, }, { name: "Drop with other input NIC filtering", - setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: otherNICName}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{InputInterface: otherNICName}), expectForward: true, }, { name: "Drop with other output NIC filtering", - setupFilter: setupDropFilter(stack.IPHeaderFilter{OutputInterface: otherNICName}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{OutputInterface: otherNICName}), expectForward: true, }, { name: "Drop with other input and output NIC filtering", - setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: otherNICName, OutputInterface: nic2Name}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{InputInterface: otherNICName, OutputInterface: nic2Name}), expectForward: true, }, { name: "Drop with input and other output NIC filtering", - setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: nic1Name, OutputInterface: otherNICName}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{InputInterface: nic1Name, OutputInterface: otherNICName}), expectForward: true, }, { name: "Drop with other input and other output NIC filtering", - setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: otherNICName, OutputInterface: otherNICName}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{InputInterface: otherNICName, OutputInterface: otherNICName}), expectForward: true, }, { name: "Drop with inverted input NIC filtering", - setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: nic1Name, InputInterfaceInvert: true}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{InputInterface: nic1Name, InputInterfaceInvert: true}), expectForward: true, }, { name: "Drop with inverted output NIC filtering", - setupFilter: setupDropFilter(stack.IPHeaderFilter{OutputInterface: nic2Name, OutputInterfaceInvert: true}), + setupFilter: setupDropFilter(stack.Forward, stack.IPHeaderFilter{OutputInterface: nic2Name, OutputInterfaceInvert: true}), expectForward: true, }, } @@ -941,3 +941,194 @@ func TestForwardingHook(t *testing.T) { }) } } + +func TestInputHookWithLocalForwarding(t *testing.T) { + const ( + nicID1 = 1 + nicID2 = 2 + + nic1Name = "nic1" + nic2Name = "nic2" + + otherNICName = "otherNIC" + ) + + tests := []struct { + name string + netProto tcpip.NetworkProtocolNumber + rx func(*channel.Endpoint) + checker func(*testing.T, []byte) + }{ + { + name: "IPv4", + netProto: ipv4.ProtocolNumber, + rx: func(e *channel.Endpoint) { + utils.RxICMPv4EchoRequest(e, utils.RemoteIPv4Addr, utils.Ipv4Addr2.AddressWithPrefix.Address, ttl) + }, + checker: func(t *testing.T, b []byte) { + checker.IPv4(t, b, + checker.SrcAddr(utils.Ipv4Addr2.AddressWithPrefix.Address), + checker.DstAddr(utils.RemoteIPv4Addr), + checker.ICMPv4( + checker.ICMPv4Type(header.ICMPv4EchoReply))) + }, + }, + { + name: "IPv6", + netProto: ipv6.ProtocolNumber, + rx: func(e *channel.Endpoint) { + utils.RxICMPv6EchoRequest(e, utils.RemoteIPv6Addr, utils.Ipv6Addr2.AddressWithPrefix.Address, ttl) + }, + checker: func(t *testing.T, b []byte) { + checker.IPv6(t, b, + checker.SrcAddr(utils.Ipv6Addr2.AddressWithPrefix.Address), + checker.DstAddr(utils.RemoteIPv6Addr), + checker.ICMPv6( + checker.ICMPv6Type(header.ICMPv6EchoReply))) + }, + }, + } + + subTests := []struct { + name string + setupFilter func(*testing.T, *stack.Stack, tcpip.NetworkProtocolNumber) + expectDrop bool + }{ + { + name: "Accept", + setupFilter: func(*testing.T, *stack.Stack, tcpip.NetworkProtocolNumber) { /* no filter */ }, + expectDrop: false, + }, + + { + name: "Drop", + setupFilter: setupDropFilter(stack.Input, stack.IPHeaderFilter{}), + expectDrop: true, + }, + { + name: "Drop with input NIC filtering on arrival NIC", + setupFilter: setupDropFilter(stack.Input, stack.IPHeaderFilter{InputInterface: nic1Name}), + expectDrop: true, + }, + { + name: "Drop with input NIC filtering on delivered NIC", + setupFilter: setupDropFilter(stack.Input, stack.IPHeaderFilter{InputInterface: nic2Name}), + expectDrop: false, + }, + + { + name: "Drop with input NIC filtering on other NIC", + setupFilter: setupDropFilter(stack.Input, stack.IPHeaderFilter{InputInterface: otherNICName}), + expectDrop: false, + }, + } + + for _, test := range tests { + t.Run(test.name, func(t *testing.T) { + for _, subTest := range subTests { + t.Run(subTest.name, func(t *testing.T) { + s := stack.New(stack.Options{ + NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol}, + }) + + subTest.setupFilter(t, s, test.netProto) + + e1 := channel.New(1, header.IPv6MinimumMTU, "") + if err := s.CreateNICWithOptions(nicID1, e1, stack.NICOptions{Name: nic1Name}); err != nil { + t.Fatalf("s.CreateNICWithOptions(%d, _, _): %s", nicID1, err) + } + if err := s.AddProtocolAddress(nicID1, utils.Ipv4Addr1); err != nil { + t.Fatalf("s.AddProtocolAddress(%d, %#v): %s", nicID1, utils.Ipv4Addr1, err) + } + if err := s.AddProtocolAddress(nicID1, utils.Ipv6Addr1); err != nil { + t.Fatalf("s.AddProtocolAddress(%d, %#v): %s", nicID1, utils.Ipv6Addr1, err) + } + + e2 := channel.New(1, header.IPv6MinimumMTU, "") + if err := s.CreateNICWithOptions(nicID2, e2, stack.NICOptions{Name: nic2Name}); err != nil { + t.Fatalf("s.CreateNICWithOptions(%d, _, _): %s", nicID2, err) + } + if err := s.AddProtocolAddress(nicID2, utils.Ipv4Addr2); err != nil { + t.Fatalf("s.AddProtocolAddress(%d, %#v): %s", nicID2, utils.Ipv4Addr2, err) + } + if err := s.AddProtocolAddress(nicID2, utils.Ipv6Addr2); err != nil { + t.Fatalf("s.AddProtocolAddress(%d, %#v): %s", nicID2, utils.Ipv6Addr2, err) + } + + if err := s.SetForwardingDefaultAndAllNICs(ipv4.ProtocolNumber, true); err != nil { + t.Fatalf("s.SetForwardingDefaultAndAllNICs(%d, true): %s", ipv4.ProtocolNumber, err) + } + if err := s.SetForwardingDefaultAndAllNICs(ipv6.ProtocolNumber, true); err != nil { + t.Fatalf("s.SetForwardingDefaultAndAllNICs(%d, true): %s", ipv6.ProtocolNumber, err) + } + + s.SetRouteTable([]tcpip.Route{ + { + Destination: header.IPv4EmptySubnet, + NIC: nicID1, + }, + { + Destination: header.IPv6EmptySubnet, + NIC: nicID1, + }, + }) + + test.rx(e1) + + ep1, err := s.GetNetworkEndpoint(nicID1, test.netProto) + if err != nil { + t.Fatalf("s.GetNetworkEndpoint(%d, %d): %s", nicID1, test.netProto, err) + } + ep1Stats := ep1.Stats() + ipEP1Stats, ok := ep1Stats.(stack.IPNetworkEndpointStats) + if !ok { + t.Fatalf("got ep1Stats = %T, want = stack.IPNetworkEndpointStats", ep1Stats) + } + ip1Stats := ipEP1Stats.IPStats() + + if got := ip1Stats.PacketsReceived.Value(); got != 1 { + t.Errorf("got ip1Stats.PacketsReceived.Value() = %d, want = 1", got) + } + if got := ip1Stats.ValidPacketsReceived.Value(); got != 1 { + t.Errorf("got ip1Stats.ValidPacketsReceived.Value() = %d, want = 1", got) + } + if got, want := ip1Stats.PacketsSent.Value(), boolToInt(!subTest.expectDrop); got != want { + t.Errorf("got ip1Stats.PacketsSent.Value() = %d, want = %d", got, want) + } + + ep2, err := s.GetNetworkEndpoint(nicID2, test.netProto) + if err != nil { + t.Fatalf("s.GetNetworkEndpoint(%d, %d): %s", nicID2, test.netProto, err) + } + ep2Stats := ep2.Stats() + ipEP2Stats, ok := ep2Stats.(stack.IPNetworkEndpointStats) + if !ok { + t.Fatalf("got ep2Stats = %T, want = stack.IPNetworkEndpointStats", ep2Stats) + } + ip2Stats := ipEP2Stats.IPStats() + if got := ip2Stats.PacketsReceived.Value(); got != 0 { + t.Errorf("got ip2Stats.PacketsReceived.Value() = %d, want = 0", got) + } + if got := ip2Stats.ValidPacketsReceived.Value(); got != 1 { + t.Errorf("got ip2Stats.ValidPacketsReceived.Value() = %d, want = 1", got) + } + if got, want := ip2Stats.IPTablesInputDropped.Value(), boolToInt(subTest.expectDrop); got != want { + t.Errorf("got ip2Stats.IPTablesInputDropped.Value() = %d, want = %d", got, want) + } + if got := ip2Stats.PacketsSent.Value(); got != 0 { + t.Errorf("got ip2Stats.PacketsSent.Value() = %d, want = 0", got) + } + + if p, ok := e1.Read(); ok == subTest.expectDrop { + t.Errorf("got e1.Read() = (%#v, %t), want = (_, %t)", p, ok, !subTest.expectDrop) + } else if !subTest.expectDrop { + test.checker(t, stack.PayloadSince(p.Pkt.NetworkHeader())) + } + if p, ok := e2.Read(); ok { + t.Errorf("got e1.Read() = (%#v, true), want = (_, false)", p) + } + }) + } + }) + } +} diff --git a/pkg/tcpip/tests/integration/link_resolution_test.go b/pkg/tcpip/tests/integration/link_resolution_test.go index c657714ba..27caa0c28 100644 --- a/pkg/tcpip/tests/integration/link_resolution_test.go +++ b/pkg/tcpip/tests/integration/link_resolution_test.go @@ -17,6 +17,8 @@ package link_resolution_test import ( "bytes" "fmt" + "net" + "runtime" "testing" "time" @@ -27,12 +29,14 @@ import ( "gvisor.dev/gvisor/pkg/tcpip/checker" "gvisor.dev/gvisor/pkg/tcpip/faketime" "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/pkg/tcpip/link/channel" "gvisor.dev/gvisor/pkg/tcpip/link/pipe" "gvisor.dev/gvisor/pkg/tcpip/network/arp" "gvisor.dev/gvisor/pkg/tcpip/network/ipv4" "gvisor.dev/gvisor/pkg/tcpip/network/ipv6" "gvisor.dev/gvisor/pkg/tcpip/stack" "gvisor.dev/gvisor/pkg/tcpip/tests/utils" + tcptestutil "gvisor.dev/gvisor/pkg/tcpip/testutil" "gvisor.dev/gvisor/pkg/tcpip/transport/icmp" "gvisor.dev/gvisor/pkg/tcpip/transport/tcp" "gvisor.dev/gvisor/pkg/tcpip/transport/udp" @@ -283,9 +287,11 @@ func TestTCPLinkResolutionFailure(t *testing.T) { for _, test := range tests { t.Run(test.name, func(t *testing.T) { + clock := faketime.NewManualClock() stackOpts := stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{arp.NewProtocol, ipv4.NewProtocol, ipv6.NewProtocol}, TransportProtocols: []stack.TransportProtocolFactory{tcp.NewProtocol}, + Clock: clock, } host1Stack, host2Stack := setupStack(t, stackOpts, host1NICID, host2NICID) @@ -329,7 +335,17 @@ func TestTCPLinkResolutionFailure(t *testing.T) { // Wait for an error due to link resolution failing, or the endpoint to be // writable. + if test.expectedWriteErr != nil { + nudConfigs, err := host1Stack.NUDConfigurations(host1NICID, test.netProto) + if err != nil { + t.Fatalf("host1Stack.NUDConfigurations(%d, %d): %s", host1NICID, test.netProto, err) + } + clock.Advance(time.Duration(nudConfigs.MaxMulticastProbes) * nudConfigs.RetransmitTimer) + } else { + clock.RunImmediatelyScheduledJobs() + } <-ch + { var r bytes.Reader r.Reset([]byte{0}) @@ -395,6 +411,242 @@ func TestTCPLinkResolutionFailure(t *testing.T) { } } +func TestForwardingWithLinkResolutionFailure(t *testing.T) { + const ( + incomingNICID = 1 + outgoingNICID = 2 + ttl = 2 + expectedHostUnreachableErrorCount = 1 + ) + outgoingLinkAddr := tcptestutil.MustParseLink("02:03:03:04:05:06") + + rxICMPv4EchoRequest := func(e *channel.Endpoint, src, dst tcpip.Address) { + utils.RxICMPv4EchoRequest(e, src, dst, ttl) + } + + rxICMPv6EchoRequest := func(e *channel.Endpoint, src, dst tcpip.Address) { + utils.RxICMPv6EchoRequest(e, src, dst, ttl) + } + + arpChecker := func(t *testing.T, request channel.PacketInfo, src, dst tcpip.Address) { + if request.Proto != arp.ProtocolNumber { + t.Errorf("got request.Proto = %d, want = %d", request.Proto, arp.ProtocolNumber) + } + if request.Route.RemoteLinkAddress != header.EthernetBroadcastAddress { + t.Errorf("got request.Route.RemoteLinkAddress = %s, want = %s", request.Route.RemoteLinkAddress, header.EthernetBroadcastAddress) + } + rep := header.ARP(request.Pkt.NetworkHeader().View()) + if got := rep.Op(); got != header.ARPRequest { + t.Errorf("got Op() = %d, want = %d", got, header.ARPRequest) + } + if got := tcpip.LinkAddress(rep.HardwareAddressSender()); got != outgoingLinkAddr { + t.Errorf("got HardwareAddressSender = %s, want = %s", got, outgoingLinkAddr) + } + if got := tcpip.Address(rep.ProtocolAddressSender()); got != src { + t.Errorf("got ProtocolAddressSender = %s, want = %s", got, src) + } + if got := tcpip.Address(rep.ProtocolAddressTarget()); got != dst { + t.Errorf("got ProtocolAddressTarget = %s, want = %s", got, dst) + } + } + + ndpChecker := func(t *testing.T, request channel.PacketInfo, src, dst tcpip.Address) { + if request.Proto != header.IPv6ProtocolNumber { + t.Fatalf("got Proto = %d, want = %d", request.Proto, header.IPv6ProtocolNumber) + } + + snmc := header.SolicitedNodeAddr(dst) + if want := header.EthernetAddressFromMulticastIPv6Address(snmc); request.Route.RemoteLinkAddress != want { + t.Errorf("got remote link address = %s, want = %s", request.Route.RemoteLinkAddress, want) + } + + checker.IPv6(t, stack.PayloadSince(request.Pkt.NetworkHeader()), + checker.SrcAddr(src), + checker.DstAddr(snmc), + checker.TTL(header.NDPHopLimit), + checker.NDPNS( + checker.NDPNSTargetAddress(dst), + )) + } + + icmpv4Checker := func(t *testing.T, b []byte, src, dst tcpip.Address) { + checker.IPv4(t, b, + checker.SrcAddr(src), + checker.DstAddr(dst), + checker.TTL(ipv4.DefaultTTL), + checker.ICMPv4( + checker.ICMPv4Checksum(), + checker.ICMPv4Type(header.ICMPv4DstUnreachable), + checker.ICMPv4Code(header.ICMPv4HostUnreachable), + ), + ) + } + + icmpv6Checker := func(t *testing.T, b []byte, src, dst tcpip.Address) { + checker.IPv6(t, b, + checker.SrcAddr(src), + checker.DstAddr(dst), + checker.TTL(ipv6.DefaultTTL), + checker.ICMPv6( + checker.ICMPv6Type(header.ICMPv6DstUnreachable), + checker.ICMPv6Code(header.ICMPv6AddressUnreachable), + ), + ) + } + + tests := []struct { + name string + networkProtocolFactory []stack.NetworkProtocolFactory + networkProtocolNumber tcpip.NetworkProtocolNumber + sourceAddr tcpip.Address + destAddr tcpip.Address + incomingAddr tcpip.AddressWithPrefix + outgoingAddr tcpip.AddressWithPrefix + transportProtocol func(*stack.Stack) stack.TransportProtocol + rx func(*channel.Endpoint, tcpip.Address, tcpip.Address) + linkResolutionRequestChecker func(*testing.T, channel.PacketInfo, tcpip.Address, tcpip.Address) + icmpReplyChecker func(*testing.T, []byte, tcpip.Address, tcpip.Address) + mtu uint32 + }{ + { + name: "IPv4 Host unreachable", + networkProtocolFactory: []stack.NetworkProtocolFactory{arp.NewProtocol, ipv4.NewProtocol}, + networkProtocolNumber: header.IPv4ProtocolNumber, + sourceAddr: tcptestutil.MustParse4("10.0.0.2"), + destAddr: tcptestutil.MustParse4("11.0.0.2"), + incomingAddr: tcpip.AddressWithPrefix{ + Address: tcpip.Address(net.ParseIP("10.0.0.1").To4()), + PrefixLen: 8, + }, + outgoingAddr: tcpip.AddressWithPrefix{ + Address: tcpip.Address(net.ParseIP("11.0.0.1").To4()), + PrefixLen: 8, + }, + transportProtocol: icmp.NewProtocol4, + linkResolutionRequestChecker: arpChecker, + icmpReplyChecker: icmpv4Checker, + rx: rxICMPv4EchoRequest, + mtu: ipv4.MaxTotalSize, + }, + { + name: "IPv6 Host unreachable", + networkProtocolFactory: []stack.NetworkProtocolFactory{ipv6.NewProtocol}, + networkProtocolNumber: header.IPv6ProtocolNumber, + sourceAddr: tcptestutil.MustParse6("10::2"), + destAddr: tcptestutil.MustParse6("11::2"), + incomingAddr: tcpip.AddressWithPrefix{ + Address: tcpip.Address(net.ParseIP("10::1").To16()), + PrefixLen: 64, + }, + outgoingAddr: tcpip.AddressWithPrefix{ + Address: tcpip.Address(net.ParseIP("11::1").To16()), + PrefixLen: 64, + }, + transportProtocol: icmp.NewProtocol6, + linkResolutionRequestChecker: ndpChecker, + icmpReplyChecker: icmpv6Checker, + rx: rxICMPv6EchoRequest, + mtu: header.IPv6MinimumMTU, + }, + } + for _, test := range tests { + t.Run(test.name, func(t *testing.T) { + clock := faketime.NewManualClock() + + s := stack.New(stack.Options{ + NetworkProtocols: test.networkProtocolFactory, + TransportProtocols: []stack.TransportProtocolFactory{test.transportProtocol}, + Clock: clock, + }) + + // Set up endpoint through which we will receive packets. + incomingEndpoint := channel.New(1, test.mtu, "") + if err := s.CreateNIC(incomingNICID, incomingEndpoint); err != nil { + t.Fatalf("CreateNIC(%d, _): %s", incomingNICID, err) + } + incomingProtoAddr := tcpip.ProtocolAddress{ + Protocol: test.networkProtocolNumber, + AddressWithPrefix: test.incomingAddr, + } + if err := s.AddProtocolAddress(incomingNICID, incomingProtoAddr); err != nil { + t.Fatalf("AddProtocolAddress(%d, %#v): %s", incomingNICID, incomingProtoAddr, err) + } + + // Set up endpoint through which we will attempt to forward packets. + outgoingEndpoint := channel.New(1, test.mtu, outgoingLinkAddr) + outgoingEndpoint.LinkEPCapabilities |= stack.CapabilityResolutionRequired + if err := s.CreateNIC(outgoingNICID, outgoingEndpoint); err != nil { + t.Fatalf("CreateNIC(%d, _): %s", outgoingNICID, err) + } + outgoingProtoAddr := tcpip.ProtocolAddress{ + Protocol: test.networkProtocolNumber, + AddressWithPrefix: test.outgoingAddr, + } + if err := s.AddProtocolAddress(outgoingNICID, outgoingProtoAddr); err != nil { + t.Fatalf("AddProtocolAddress(%d, %#v): %s", outgoingNICID, outgoingProtoAddr, err) + } + + s.SetRouteTable([]tcpip.Route{ + { + Destination: test.incomingAddr.Subnet(), + NIC: incomingNICID, + }, + { + Destination: test.outgoingAddr.Subnet(), + NIC: outgoingNICID, + }, + }) + + if err := s.SetForwardingDefaultAndAllNICs(test.networkProtocolNumber, true); err != nil { + t.Fatalf("SetForwardingDefaultAndAllNICs(%d, true): %s", test.networkProtocolNumber, err) + } + + test.rx(incomingEndpoint, test.sourceAddr, test.destAddr) + + nudConfigs, err := s.NUDConfigurations(outgoingNICID, test.networkProtocolNumber) + if err != nil { + t.Fatalf("s.NUDConfigurations(%d, %d): %s", outgoingNICID, test.networkProtocolNumber, err) + } + // Trigger the first packet on the endpoint. + clock.RunImmediatelyScheduledJobs() + + for i := 0; i < int(nudConfigs.MaxMulticastProbes); i++ { + request, ok := outgoingEndpoint.Read() + if !ok { + t.Fatal("expected ARP packet through outgoing NIC") + } + + test.linkResolutionRequestChecker(t, request, test.outgoingAddr.Address, test.destAddr) + + // Advance the clock the span of one request timeout. + clock.Advance(nudConfigs.RetransmitTimer) + } + + // Next, we make a blocking read to retrieve the error packet. This is + // necessary because outgoing packets are dequeued asynchronously when + // link resolution fails, and this dequeue is what triggers the ICMP + // error. + reply, ok := incomingEndpoint.Read() + if !ok { + t.Fatal("expected ICMP packet through incoming NIC") + } + + test.icmpReplyChecker(t, stack.PayloadSince(reply.Pkt.NetworkHeader()), test.incomingAddr.Address, test.sourceAddr) + + // Since link resolution failed, we don't expect the packet to be + // forwarded. + forwardedPacket, ok := outgoingEndpoint.Read() + if ok { + t.Fatalf("expected no ICMP Echo packet through outgoing NIC, instead found: %#v", forwardedPacket) + } + + if got, want := s.Stats().IP.Forwarding.HostUnreachable.Value(), expectedHostUnreachableErrorCount; int(got) != want { + t.Errorf("got rt.Stats().IP.Forwarding.HostUnreachable.Value() = %d, want = %d", got, want) + } + }) + } +} + func TestGetLinkAddress(t *testing.T) { const ( host1NICID = 1 @@ -449,8 +701,10 @@ func TestGetLinkAddress(t *testing.T) { for _, test := range tests { t.Run(test.name, func(t *testing.T) { + clock := faketime.NewManualClock() stackOpts := stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{arp.NewProtocol, ipv4.NewProtocol, ipv6.NewProtocol}, + Clock: clock, } host1Stack, _ := setupStack(t, stackOpts, host1NICID, host2NICID) @@ -466,8 +720,20 @@ func TestGetLinkAddress(t *testing.T) { if test.expectedErr == nil { wantRes.LinkAddress = utils.LinkAddr2 } - if diff := cmp.Diff(wantRes, <-ch); diff != "" { - t.Fatalf("link resolution result mismatch (-want +got):\n%s", diff) + + nudConfigs, err := host1Stack.NUDConfigurations(host1NICID, test.netProto) + if err != nil { + t.Fatalf("host1Stack.NUDConfigurations(%d, %d): %s", host1NICID, test.netProto, err) + } + + clock.Advance(time.Duration(nudConfigs.MaxMulticastProbes) * nudConfigs.RetransmitTimer) + select { + case got := <-ch: + if diff := cmp.Diff(wantRes, got); diff != "" { + t.Fatalf("link resolution result mismatch (-want +got):\n%s", diff) + } + default: + t.Fatal("event didn't arrive") } }) } @@ -544,8 +810,10 @@ func TestRouteResolvedFields(t *testing.T) { for _, test := range tests { t.Run(test.name, func(t *testing.T) { + clock := faketime.NewManualClock() stackOpts := stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{arp.NewProtocol, ipv4.NewProtocol, ipv6.NewProtocol}, + Clock: clock, } host1Stack, _ := setupStack(t, stackOpts, host1NICID, host2NICID) @@ -575,8 +843,20 @@ func TestRouteResolvedFields(t *testing.T) { if _, ok := err.(*tcpip.ErrWouldBlock); !ok { t.Errorf("got r.ResolvedFields(_) = %s, want = %s", err, &tcpip.ErrWouldBlock{}) } - if diff := cmp.Diff(stack.ResolvedFieldsResult{RouteInfo: wantRouteInfo, Err: test.expectedErr}, <-ch, cmp.AllowUnexported(stack.RouteInfo{})); diff != "" { - t.Errorf("route resolve result mismatch (-want +got):\n%s", diff) + + nudConfigs, err := host1Stack.NUDConfigurations(host1NICID, test.netProto) + if err != nil { + t.Fatalf("host1Stack.NUDConfigurations(%d, %d): %s", host1NICID, test.netProto, err) + } + clock.Advance(time.Duration(nudConfigs.MaxMulticastProbes) * nudConfigs.RetransmitTimer) + + select { + case got := <-ch: + if diff := cmp.Diff(stack.ResolvedFieldsResult{RouteInfo: wantRouteInfo, Err: test.expectedErr}, got, cmp.AllowUnexported(stack.RouteInfo{})); diff != "" { + t.Errorf("route resolve result mismatch (-want +got):\n%s", diff) + } + default: + t.Fatalf("event didn't arrive") } if test.expectedErr != nil { @@ -789,11 +1069,16 @@ func (d *nudDispatcher) OnNeighborRemoved(nicID tcpip.NICID, entry stack.Neighbo d.c <- e } -func (d *nudDispatcher) waitForEvent(want eventInfo) error { - if diff := cmp.Diff(want, <-d.c, cmp.AllowUnexported(eventInfo{}), cmpopts.IgnoreFields(stack.NeighborEntry{}, "UpdatedAtNanos")); diff != "" { - return fmt.Errorf("got invalid event (-want +got):\n%s", diff) +func (d *nudDispatcher) expectEvent(want eventInfo) error { + select { + case got := <-d.c: + if diff := cmp.Diff(want, got, cmp.AllowUnexported(eventInfo{}), cmpopts.IgnoreFields(stack.NeighborEntry{}, "UpdatedAt")); diff != "" { + return fmt.Errorf("got invalid event (-want +got):\n%s", diff) + } + return nil + default: + return fmt.Errorf("event didn't arrive") } - return nil } // TestTCPConfirmNeighborReachability tests that TCP informs layers beneath it @@ -804,7 +1089,7 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { netProto tcpip.NetworkProtocolNumber remoteAddr tcpip.Address neighborAddr tcpip.Address - getEndpoints func(*testing.T, *stack.Stack, *stack.Stack, *stack.Stack) (tcpip.Endpoint, tcpip.Endpoint, <-chan struct{}) + getEndpoints func(*testing.T, *stack.Stack, *stack.Stack, *stack.Stack) (tcpip.Endpoint, <-chan struct{}, tcpip.Endpoint, <-chan struct{}) isHost1Listener bool }{ { @@ -812,23 +1097,25 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { netProto: ipv4.ProtocolNumber, remoteAddr: utils.Host2IPv4Addr.AddressWithPrefix.Address, neighborAddr: utils.RouterNIC1IPv4Addr.AddressWithPrefix.Address, - getEndpoints: func(t *testing.T, host1Stack, _, host2Stack *stack.Stack) (tcpip.Endpoint, tcpip.Endpoint, <-chan struct{}) { + getEndpoints: func(t *testing.T, host1Stack, _, host2Stack *stack.Stack) (tcpip.Endpoint, <-chan struct{}, tcpip.Endpoint, <-chan struct{}) { var listenerWQ waiter.Queue + listenerWE, listenerCH := waiter.NewChannelEntry(nil) + listenerWQ.EventRegister(&listenerWE, waiter.EventIn) listenerEP, err := host2Stack.NewEndpoint(tcp.ProtocolNumber, ipv4.ProtocolNumber, &listenerWQ) if err != nil { t.Fatalf("host2Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv4.ProtocolNumber, err) } + t.Cleanup(listenerEP.Close) var clientWQ waiter.Queue clientWE, clientCH := waiter.NewChannelEntry(nil) - clientWQ.EventRegister(&clientWE, waiter.WritableEvents) + clientWQ.EventRegister(&clientWE, waiter.ReadableEvents|waiter.WritableEvents) clientEP, err := host1Stack.NewEndpoint(tcp.ProtocolNumber, ipv4.ProtocolNumber, &clientWQ) if err != nil { - listenerEP.Close() t.Fatalf("host1Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv4.ProtocolNumber, err) } - return listenerEP, clientEP, clientCH + return listenerEP, listenerCH, clientEP, clientCH }, }, { @@ -836,23 +1123,25 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { netProto: ipv6.ProtocolNumber, remoteAddr: utils.Host2IPv6Addr.AddressWithPrefix.Address, neighborAddr: utils.RouterNIC1IPv6Addr.AddressWithPrefix.Address, - getEndpoints: func(t *testing.T, host1Stack, _, host2Stack *stack.Stack) (tcpip.Endpoint, tcpip.Endpoint, <-chan struct{}) { + getEndpoints: func(t *testing.T, host1Stack, _, host2Stack *stack.Stack) (tcpip.Endpoint, <-chan struct{}, tcpip.Endpoint, <-chan struct{}) { var listenerWQ waiter.Queue + listenerWE, listenerCH := waiter.NewChannelEntry(nil) + listenerWQ.EventRegister(&listenerWE, waiter.EventIn) listenerEP, err := host2Stack.NewEndpoint(tcp.ProtocolNumber, ipv6.ProtocolNumber, &listenerWQ) if err != nil { t.Fatalf("host2Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv6.ProtocolNumber, err) } + t.Cleanup(listenerEP.Close) var clientWQ waiter.Queue clientWE, clientCH := waiter.NewChannelEntry(nil) - clientWQ.EventRegister(&clientWE, waiter.WritableEvents) + clientWQ.EventRegister(&clientWE, waiter.ReadableEvents|waiter.WritableEvents) clientEP, err := host1Stack.NewEndpoint(tcp.ProtocolNumber, ipv6.ProtocolNumber, &clientWQ) if err != nil { - listenerEP.Close() t.Fatalf("host1Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv6.ProtocolNumber, err) } - return listenerEP, clientEP, clientCH + return listenerEP, listenerCH, clientEP, clientCH }, }, { @@ -860,23 +1149,25 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { netProto: ipv4.ProtocolNumber, remoteAddr: utils.RouterNIC1IPv4Addr.AddressWithPrefix.Address, neighborAddr: utils.RouterNIC1IPv4Addr.AddressWithPrefix.Address, - getEndpoints: func(t *testing.T, host1Stack, routerStack, _ *stack.Stack) (tcpip.Endpoint, tcpip.Endpoint, <-chan struct{}) { + getEndpoints: func(t *testing.T, host1Stack, routerStack, _ *stack.Stack) (tcpip.Endpoint, <-chan struct{}, tcpip.Endpoint, <-chan struct{}) { var listenerWQ waiter.Queue + listenerWE, listenerCH := waiter.NewChannelEntry(nil) + listenerWQ.EventRegister(&listenerWE, waiter.EventIn) listenerEP, err := routerStack.NewEndpoint(tcp.ProtocolNumber, ipv4.ProtocolNumber, &listenerWQ) if err != nil { t.Fatalf("routerStack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv4.ProtocolNumber, err) } + t.Cleanup(listenerEP.Close) var clientWQ waiter.Queue clientWE, clientCH := waiter.NewChannelEntry(nil) - clientWQ.EventRegister(&clientWE, waiter.WritableEvents) + clientWQ.EventRegister(&clientWE, waiter.ReadableEvents|waiter.WritableEvents) clientEP, err := host1Stack.NewEndpoint(tcp.ProtocolNumber, ipv4.ProtocolNumber, &clientWQ) if err != nil { - listenerEP.Close() t.Fatalf("host1Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv4.ProtocolNumber, err) } - return listenerEP, clientEP, clientCH + return listenerEP, listenerCH, clientEP, clientCH }, }, { @@ -884,23 +1175,25 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { netProto: ipv6.ProtocolNumber, remoteAddr: utils.RouterNIC1IPv6Addr.AddressWithPrefix.Address, neighborAddr: utils.RouterNIC1IPv6Addr.AddressWithPrefix.Address, - getEndpoints: func(t *testing.T, host1Stack, routerStack, _ *stack.Stack) (tcpip.Endpoint, tcpip.Endpoint, <-chan struct{}) { + getEndpoints: func(t *testing.T, host1Stack, routerStack, _ *stack.Stack) (tcpip.Endpoint, <-chan struct{}, tcpip.Endpoint, <-chan struct{}) { var listenerWQ waiter.Queue + listenerWE, listenerCH := waiter.NewChannelEntry(nil) + listenerWQ.EventRegister(&listenerWE, waiter.EventIn) listenerEP, err := routerStack.NewEndpoint(tcp.ProtocolNumber, ipv6.ProtocolNumber, &listenerWQ) if err != nil { t.Fatalf("routerStack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv6.ProtocolNumber, err) } + t.Cleanup(listenerEP.Close) var clientWQ waiter.Queue clientWE, clientCH := waiter.NewChannelEntry(nil) - clientWQ.EventRegister(&clientWE, waiter.WritableEvents) + clientWQ.EventRegister(&clientWE, waiter.ReadableEvents|waiter.WritableEvents) clientEP, err := host1Stack.NewEndpoint(tcp.ProtocolNumber, ipv6.ProtocolNumber, &clientWQ) if err != nil { - listenerEP.Close() t.Fatalf("host1Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv6.ProtocolNumber, err) } - return listenerEP, clientEP, clientCH + return listenerEP, listenerCH, clientEP, clientCH }, }, { @@ -908,23 +1201,25 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { netProto: ipv4.ProtocolNumber, remoteAddr: utils.Host1IPv4Addr.AddressWithPrefix.Address, neighborAddr: utils.RouterNIC1IPv4Addr.AddressWithPrefix.Address, - getEndpoints: func(t *testing.T, host1Stack, routerStack, _ *stack.Stack) (tcpip.Endpoint, tcpip.Endpoint, <-chan struct{}) { + getEndpoints: func(t *testing.T, host1Stack, routerStack, _ *stack.Stack) (tcpip.Endpoint, <-chan struct{}, tcpip.Endpoint, <-chan struct{}) { var listenerWQ waiter.Queue + listenerWE, listenerCH := waiter.NewChannelEntry(nil) + listenerWQ.EventRegister(&listenerWE, waiter.EventIn) listenerEP, err := host1Stack.NewEndpoint(tcp.ProtocolNumber, ipv4.ProtocolNumber, &listenerWQ) if err != nil { t.Fatalf("host1Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv4.ProtocolNumber, err) } + t.Cleanup(listenerEP.Close) var clientWQ waiter.Queue clientWE, clientCH := waiter.NewChannelEntry(nil) - clientWQ.EventRegister(&clientWE, waiter.WritableEvents) + clientWQ.EventRegister(&clientWE, waiter.ReadableEvents|waiter.WritableEvents) clientEP, err := routerStack.NewEndpoint(tcp.ProtocolNumber, ipv4.ProtocolNumber, &clientWQ) if err != nil { - listenerEP.Close() t.Fatalf("routerStack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv4.ProtocolNumber, err) } - return listenerEP, clientEP, clientCH + return listenerEP, listenerCH, clientEP, clientCH }, isHost1Listener: true, }, @@ -933,23 +1228,25 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { netProto: ipv6.ProtocolNumber, remoteAddr: utils.Host1IPv6Addr.AddressWithPrefix.Address, neighborAddr: utils.RouterNIC1IPv6Addr.AddressWithPrefix.Address, - getEndpoints: func(t *testing.T, host1Stack, routerStack, _ *stack.Stack) (tcpip.Endpoint, tcpip.Endpoint, <-chan struct{}) { + getEndpoints: func(t *testing.T, host1Stack, routerStack, _ *stack.Stack) (tcpip.Endpoint, <-chan struct{}, tcpip.Endpoint, <-chan struct{}) { var listenerWQ waiter.Queue + listenerWE, listenerCH := waiter.NewChannelEntry(nil) + listenerWQ.EventRegister(&listenerWE, waiter.EventIn) listenerEP, err := host1Stack.NewEndpoint(tcp.ProtocolNumber, ipv6.ProtocolNumber, &listenerWQ) if err != nil { t.Fatalf("host1Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv6.ProtocolNumber, err) } + t.Cleanup(listenerEP.Close) var clientWQ waiter.Queue clientWE, clientCH := waiter.NewChannelEntry(nil) - clientWQ.EventRegister(&clientWE, waiter.WritableEvents) + clientWQ.EventRegister(&clientWE, waiter.ReadableEvents|waiter.WritableEvents) clientEP, err := routerStack.NewEndpoint(tcp.ProtocolNumber, ipv6.ProtocolNumber, &clientWQ) if err != nil { - listenerEP.Close() t.Fatalf("routerStack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv6.ProtocolNumber, err) } - return listenerEP, clientEP, clientCH + return listenerEP, listenerCH, clientEP, clientCH }, isHost1Listener: true, }, @@ -958,23 +1255,25 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { netProto: ipv4.ProtocolNumber, remoteAddr: utils.Host1IPv4Addr.AddressWithPrefix.Address, neighborAddr: utils.RouterNIC1IPv4Addr.AddressWithPrefix.Address, - getEndpoints: func(t *testing.T, host1Stack, _, host2Stack *stack.Stack) (tcpip.Endpoint, tcpip.Endpoint, <-chan struct{}) { + getEndpoints: func(t *testing.T, host1Stack, _, host2Stack *stack.Stack) (tcpip.Endpoint, <-chan struct{}, tcpip.Endpoint, <-chan struct{}) { var listenerWQ waiter.Queue + listenerWE, listenerCH := waiter.NewChannelEntry(nil) + listenerWQ.EventRegister(&listenerWE, waiter.EventIn) listenerEP, err := host1Stack.NewEndpoint(tcp.ProtocolNumber, ipv4.ProtocolNumber, &listenerWQ) if err != nil { t.Fatalf("host1Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv4.ProtocolNumber, err) } + t.Cleanup(listenerEP.Close) var clientWQ waiter.Queue clientWE, clientCH := waiter.NewChannelEntry(nil) - clientWQ.EventRegister(&clientWE, waiter.WritableEvents) + clientWQ.EventRegister(&clientWE, waiter.ReadableEvents|waiter.WritableEvents) clientEP, err := host2Stack.NewEndpoint(tcp.ProtocolNumber, ipv4.ProtocolNumber, &clientWQ) if err != nil { - listenerEP.Close() t.Fatalf("host2Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv4.ProtocolNumber, err) } - return listenerEP, clientEP, clientCH + return listenerEP, listenerCH, clientEP, clientCH }, isHost1Listener: true, }, @@ -983,23 +1282,25 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { netProto: ipv6.ProtocolNumber, remoteAddr: utils.Host1IPv6Addr.AddressWithPrefix.Address, neighborAddr: utils.RouterNIC1IPv6Addr.AddressWithPrefix.Address, - getEndpoints: func(t *testing.T, host1Stack, _, host2Stack *stack.Stack) (tcpip.Endpoint, tcpip.Endpoint, <-chan struct{}) { + getEndpoints: func(t *testing.T, host1Stack, _, host2Stack *stack.Stack) (tcpip.Endpoint, <-chan struct{}, tcpip.Endpoint, <-chan struct{}) { var listenerWQ waiter.Queue + listenerWE, listenerCH := waiter.NewChannelEntry(nil) + listenerWQ.EventRegister(&listenerWE, waiter.EventIn) listenerEP, err := host1Stack.NewEndpoint(tcp.ProtocolNumber, ipv6.ProtocolNumber, &listenerWQ) if err != nil { t.Fatalf("host1Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv6.ProtocolNumber, err) } + t.Cleanup(listenerEP.Close) var clientWQ waiter.Queue clientWE, clientCH := waiter.NewChannelEntry(nil) - clientWQ.EventRegister(&clientWE, waiter.WritableEvents) + clientWQ.EventRegister(&clientWE, waiter.ReadableEvents|waiter.WritableEvents) clientEP, err := host2Stack.NewEndpoint(tcp.ProtocolNumber, ipv6.ProtocolNumber, &clientWQ) if err != nil { - listenerEP.Close() t.Fatalf("host2Stack.NewEndpoint(%d, %d, _): %s", tcp.ProtocolNumber, ipv6.ProtocolNumber, err) } - return listenerEP, clientEP, clientCH + return listenerEP, listenerCH, clientEP, clientCH }, isHost1Listener: true, }, @@ -1037,14 +1338,14 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { t.Fatalf("link resolution mismatch (-want +got):\n%s", diff) } } - if err := nudDisp.waitForEvent(eventInfo{ + if err := nudDisp.expectEvent(eventInfo{ eventType: entryAdded, nicID: utils.Host1NICID, entry: stack.NeighborEntry{State: stack.Incomplete, Addr: test.neighborAddr}, }); err != nil { t.Fatalf("error waiting for initial NUD event: %s", err) } - if err := nudDisp.waitForEvent(eventInfo{ + if err := nudDisp.expectEvent(eventInfo{ eventType: entryChanged, nicID: utils.Host1NICID, entry: stack.NeighborEntry{State: stack.Reachable, Addr: test.neighborAddr, LinkAddr: utils.LinkAddr2}, @@ -1064,7 +1365,7 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { // See NUDConfigurations.BaseReachableTime for more information. maxReachableTime := time.Duration(float32(nudConfigs.BaseReachableTime) * nudConfigs.MaxRandomFactor) clock.Advance(maxReachableTime) - if err := nudDisp.waitForEvent(eventInfo{ + if err := nudDisp.expectEvent(eventInfo{ eventType: entryChanged, nicID: utils.Host1NICID, entry: stack.NeighborEntry{State: stack.Stale, Addr: test.neighborAddr, LinkAddr: utils.LinkAddr2}, @@ -1072,8 +1373,7 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { t.Fatalf("error waiting for stale NUD event: %s", err) } - listenerEP, clientEP, clientCH := test.getEndpoints(t, host1Stack, routerStack, host2Stack) - defer listenerEP.Close() + listenerEP, listenerCH, clientEP, clientCH := test.getEndpoints(t, host1Stack, routerStack, host2Stack) defer clientEP.Close() listenerAddr := tcpip.FullAddress{Addr: test.remoteAddr, Port: 1234} if err := listenerEP.Bind(listenerAddr); err != nil { @@ -1094,14 +1394,15 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { // with confirmation that the neighbor is reachable (indicated by a // successful 3-way handshake). <-clientCH - if err := nudDisp.waitForEvent(eventInfo{ + if err := nudDisp.expectEvent(eventInfo{ eventType: entryChanged, nicID: utils.Host1NICID, entry: stack.NeighborEntry{State: stack.Delay, Addr: test.neighborAddr, LinkAddr: utils.LinkAddr2}, }); err != nil { t.Fatalf("error waiting for delay NUD event: %s", err) } - if err := nudDisp.waitForEvent(eventInfo{ + <-listenerCH + if err := nudDisp.expectEvent(eventInfo{ eventType: entryChanged, nicID: utils.Host1NICID, entry: stack.NeighborEntry{State: stack.Reachable, Addr: test.neighborAddr, LinkAddr: utils.LinkAddr2}, @@ -1109,26 +1410,55 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { t.Fatalf("error waiting for reachable NUD event: %s", err) } + peerEP, peerWQ, err := listenerEP.Accept(nil) + if err != nil { + t.Fatalf("listenerEP.Accept(): %s", err) + } + defer peerEP.Close() + peerWE, peerCH := waiter.NewChannelEntry(nil) + peerWQ.EventRegister(&peerWE, waiter.ReadableEvents) + // Wait for the neighbor to be stale again then send data to the remote. // // On successful transmission, the neighbor should become reachable // without probing the neighbor as a TCP ACK would be received which is an // indication of the neighbor being reachable. clock.Advance(maxReachableTime) - if err := nudDisp.waitForEvent(eventInfo{ + if err := nudDisp.expectEvent(eventInfo{ eventType: entryChanged, nicID: utils.Host1NICID, entry: stack.NeighborEntry{State: stack.Stale, Addr: test.neighborAddr, LinkAddr: utils.LinkAddr2}, }); err != nil { t.Fatalf("error waiting for stale NUD event: %s", err) } - var r bytes.Reader - r.Reset([]byte{0}) - var wOpts tcpip.WriteOptions - if _, err := clientEP.Write(&r, wOpts); err != nil { - t.Errorf("clientEP.Write(_, %#v): %s", wOpts, err) + { + var r bytes.Reader + r.Reset([]byte{0}) + var wOpts tcpip.WriteOptions + if _, err := clientEP.Write(&r, wOpts); err != nil { + t.Errorf("clientEP.Write(_, %#v): %s", wOpts, err) + } + } + // Heads up, there is a race here. + // + // Incoming TCP segments are handled in + // tcp.(*endpoint).handleSegmentLocked: + // + // - tcp.(*endpoint).rcv.handleRcvdSegment puts the segment on the + // segment queue and notifies waiting readers (such as this channel) + // + // - tcp.(*endpoint).snd.handleRcvdSegment sends an ACK for the segment + // and notifies the NUD machinery that the peer is reachable + // + // Thus we must permit a delay between the readable signal and the + // expected NUD event. + // + // At the time of writing, this race is reliably hit with gotsan. + <-peerCH + for len(nudDisp.c) == 0 { + runtime.Gosched() } - if err := nudDisp.waitForEvent(eventInfo{ + if err := nudDisp.expectEvent(eventInfo{ eventType: entryChanged, nicID: utils.Host1NICID, entry: stack.NeighborEntry{State: stack.Delay, Addr: test.neighborAddr, LinkAddr: utils.LinkAddr2}, @@ -1141,7 +1471,7 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { // TCP should not mark the route reachable and NUD should go through the // probe state. clock.Advance(nudConfigs.DelayFirstProbeTime) - if err := nudDisp.waitForEvent(eventInfo{ + if err := nudDisp.expectEvent(eventInfo{ eventType: entryChanged, nicID: utils.Host1NICID, entry: stack.NeighborEntry{State: stack.Probe, Addr: test.neighborAddr, LinkAddr: utils.LinkAddr2}, @@ -1149,7 +1479,16 @@ func TestTCPConfirmNeighborReachability(t *testing.T) { t.Fatalf("error waiting for probe NUD event: %s", err) } } - if err := nudDisp.waitForEvent(eventInfo{ + { + var r bytes.Reader + r.Reset([]byte{0}) + var wOpts tcpip.WriteOptions + if _, err := peerEP.Write(&r, wOpts); err != nil { + t.Errorf("peerEP.Write(_, %#v): %s", wOpts, err) + } + } + <-clientCH + if err := nudDisp.expectEvent(eventInfo{ eventType: entryChanged, nicID: utils.Host1NICID, entry: stack.NeighborEntry{State: stack.Reachable, Addr: test.neighborAddr, LinkAddr: utils.LinkAddr2}, diff --git a/pkg/tcpip/tests/integration/loopback_test.go b/pkg/tcpip/tests/integration/loopback_test.go index 87d36e1dd..b4b2ec723 100644 --- a/pkg/tcpip/tests/integration/loopback_test.go +++ b/pkg/tcpip/tests/integration/loopback_test.go @@ -44,20 +44,17 @@ type ndpDispatcher struct{} func (*ndpDispatcher) OnDuplicateAddressDetectionResult(tcpip.NICID, tcpip.Address, stack.DADResult) { } -func (*ndpDispatcher) OnDefaultRouterDiscovered(tcpip.NICID, tcpip.Address) bool { - return false +func (*ndpDispatcher) OnOffLinkRouteUpdated(tcpip.NICID, tcpip.Subnet, tcpip.Address) { } -func (*ndpDispatcher) OnDefaultRouterInvalidated(tcpip.NICID, tcpip.Address) {} +func (*ndpDispatcher) OnOffLinkRouteInvalidated(tcpip.NICID, tcpip.Subnet, tcpip.Address) {} -func (*ndpDispatcher) OnOnLinkPrefixDiscovered(tcpip.NICID, tcpip.Subnet) bool { - return false +func (*ndpDispatcher) OnOnLinkPrefixDiscovered(tcpip.NICID, tcpip.Subnet) { } func (*ndpDispatcher) OnOnLinkPrefixInvalidated(tcpip.NICID, tcpip.Subnet) {} -func (*ndpDispatcher) OnAutoGenAddress(tcpip.NICID, tcpip.AddressWithPrefix) bool { - return true +func (*ndpDispatcher) OnAutoGenAddress(tcpip.NICID, tcpip.AddressWithPrefix) { } func (*ndpDispatcher) OnAutoGenAddressDeprecated(tcpip.NICID, tcpip.AddressWithPrefix) {} diff --git a/pkg/tcpip/testutil/testutil.go b/pkg/tcpip/testutil/testutil.go index f84d399fb..94b580a70 100644 --- a/pkg/tcpip/testutil/testutil.go +++ b/pkg/tcpip/testutil/testutil.go @@ -109,3 +109,15 @@ func ValidateMultiCounterStats(multi reflect.Value, counters []reflect.Value) er return nil } + +// MustParseLink parses a Link string into a tcpip.LinkAddress, panicking on +// error. +// +// The string must be in the format aa:bb:cc:dd:ee:ff or aa-bb-cc-dd-ee-ff. +func MustParseLink(addr string) tcpip.LinkAddress { + parsed, err := tcpip.ParseMACAddress(addr) + if err != nil { + panic(fmt.Sprintf("tcpip.ParseMACAddress(%s): %s", addr, err)) + } + return parsed +} diff --git a/pkg/tcpip/timer_test.go b/pkg/tcpip/timer_test.go index 1633d0aeb..ed1ed8ac6 100644 --- a/pkg/tcpip/timer_test.go +++ b/pkg/tcpip/timer_test.go @@ -15,6 +15,7 @@ package tcpip_test import ( + "math" "sync" "testing" "time" @@ -22,10 +23,85 @@ import ( "gvisor.dev/gvisor/pkg/tcpip" ) +func TestMonotonicTimeBefore(t *testing.T) { + var mt tcpip.MonotonicTime + if mt.Before(mt) { + t.Errorf("%#v.Before(%#v)", mt, mt) + } + + one := mt.Add(1) + if one.Before(mt) { + t.Errorf("%#v.Before(%#v)", one, mt) + } + if !mt.Before(one) { + t.Errorf("!%#v.Before(%#v)", mt, one) + } +} + +func TestMonotonicTimeAfter(t *testing.T) { + var mt tcpip.MonotonicTime + if mt.After(mt) { + t.Errorf("%#v.After(%#v)", mt, mt) + } + + one := mt.Add(1) + if mt.After(one) { + t.Errorf("%#v.After(%#v)", mt, one) + } + if !one.After(mt) { + t.Errorf("!%#v.After(%#v)", one, mt) + } +} + +func TestMonotonicTimeAddSub(t *testing.T) { + var mt tcpip.MonotonicTime + if one, two := mt.Add(2), mt.Add(1).Add(1); one != two { + t.Errorf("mt.Add(2) != mt.Add(1).Add(1) (%#v != %#v)", one, two) + } + + min := mt.Add(math.MinInt64) + max := mt.Add(math.MaxInt64) + + if overflow := mt.Add(1).Add(math.MaxInt64); overflow != max { + t.Errorf("mt.Add(math.MaxInt64) != mt.Add(1).Add(math.MaxInt64) (%#v != %#v)", max, overflow) + } + if underflow := mt.Add(-1).Add(math.MinInt64); underflow != min { + t.Errorf("mt.Add(math.MinInt64) != mt.Add(-1).Add(math.MinInt64) (%#v != %#v)", min, underflow) + } + + if got, want := min.Sub(min), time.Duration(0); want != got { + t.Errorf("got min.Sub(min) = %d, want %d", got, want) + } + if got, want := max.Sub(max), time.Duration(0); want != got { + t.Errorf("got max.Sub(max) = %d, want %d", got, want) + } + + if overflow, want := max.Sub(min), time.Duration(math.MaxInt64); overflow != want { + t.Errorf("mt.Add(math.MaxInt64).Sub(mt.Add(math.MinInt64) != %s (%#v)", want, overflow) + } + if underflow, want := min.Sub(max), time.Duration(math.MinInt64); underflow != want { + t.Errorf("mt.Add(math.MinInt64).Sub(mt.Add(math.MaxInt64) != %s (%#v)", want, underflow) + } +} + +func TestMonotonicTimeSub(t *testing.T) { + var mt tcpip.MonotonicTime + + if one, two := mt.Add(2), mt.Add(1).Add(1); one != two { + t.Errorf("mt.Add(2) != mt.Add(1).Add(1) (%#v != %#v)", one, two) + } + + if max, overflow := mt.Add(math.MaxInt64), mt.Add(1).Add(math.MaxInt64); max != overflow { + t.Errorf("mt.Add(math.MaxInt64) != mt.Add(1).Add(math.MaxInt64) (%#v != %#v)", max, overflow) + } + if max, underflow := mt.Add(math.MinInt64), mt.Add(-1).Add(math.MinInt64); max != underflow { + t.Errorf("mt.Add(math.MinInt64) != mt.Add(-1).Add(math.MinInt64) (%#v != %#v)", max, underflow) + } +} + const ( shortDuration = 1 * time.Nanosecond middleDuration = 100 * time.Millisecond - longDuration = 1 * time.Second ) func TestJobReschedule(t *testing.T) { @@ -53,10 +129,14 @@ func TestJobReschedule(t *testing.T) { wg.Wait() } +func stdClockWithAfter() (tcpip.Clock, func(time.Duration) <-chan time.Time) { + return tcpip.NewStdClock(), time.After +} + func TestJobExecution(t *testing.T) { t.Parallel() - clock := tcpip.NewStdClock() + clock, after := stdClockWithAfter() var lock sync.Mutex ch := make(chan struct{}) @@ -68,7 +148,7 @@ func TestJobExecution(t *testing.T) { // Wait for timer to fire. select { case <-ch: - case <-time.After(middleDuration): + case <-after(middleDuration): t.Fatal("timed out waiting for timer to fire") } @@ -76,14 +156,14 @@ func TestJobExecution(t *testing.T) { select { case <-ch: t.Fatal("no other timers should have fired") - case <-time.After(middleDuration): + case <-after(middleDuration): } } func TestCancellableTimerResetFromLongDuration(t *testing.T) { t.Parallel() - clock := tcpip.NewStdClock() + clock, after := stdClockWithAfter() var lock sync.Mutex ch := make(chan struct{}) @@ -99,7 +179,7 @@ func TestCancellableTimerResetFromLongDuration(t *testing.T) { // Wait for timer to fire. select { case <-ch: - case <-time.After(middleDuration): + case <-after(middleDuration): t.Fatal("timed out waiting for timer to fire") } @@ -107,14 +187,14 @@ func TestCancellableTimerResetFromLongDuration(t *testing.T) { select { case <-ch: t.Fatal("no other timers should have fired") - case <-time.After(middleDuration): + case <-after(middleDuration): } } func TestJobRescheduleFromShortDuration(t *testing.T) { t.Parallel() - clock := tcpip.NewStdClock() + clock, after := stdClockWithAfter() var lock sync.Mutex ch := make(chan struct{}) @@ -128,7 +208,7 @@ func TestJobRescheduleFromShortDuration(t *testing.T) { select { case <-ch: t.Fatal("timer fired after being stopped") - case <-time.After(middleDuration): + case <-after(middleDuration): } job.Schedule(shortDuration) @@ -136,7 +216,7 @@ func TestJobRescheduleFromShortDuration(t *testing.T) { // Wait for timer to fire. select { case <-ch: - case <-time.After(middleDuration): + case <-after(middleDuration): t.Fatal("timed out waiting for timer to fire") } @@ -144,14 +224,14 @@ func TestJobRescheduleFromShortDuration(t *testing.T) { select { case <-ch: t.Fatal("no other timers should have fired") - case <-time.After(middleDuration): + case <-after(middleDuration): } } func TestJobImmediatelyCancel(t *testing.T) { t.Parallel() - clock := tcpip.NewStdClock() + clock, after := stdClockWithAfter() var lock sync.Mutex ch := make(chan struct{}) @@ -167,14 +247,19 @@ func TestJobImmediatelyCancel(t *testing.T) { select { case <-ch: t.Fatal("timer fired after being stopped") - case <-time.After(middleDuration): + case <-after(middleDuration): } } +func stdClockWithAfterAndSleep() (tcpip.Clock, func(time.Duration) <-chan time.Time, func(time.Duration)) { + clock, after := stdClockWithAfter() + return clock, after, time.Sleep +} + func TestJobCancelledRescheduleWithoutLock(t *testing.T) { t.Parallel() - clock := tcpip.NewStdClock() + clock, after, sleep := stdClockWithAfterAndSleep() var lock sync.Mutex ch := make(chan struct{}) @@ -189,7 +274,7 @@ func TestJobCancelledRescheduleWithoutLock(t *testing.T) { lock.Lock() // Sleep until the timer fires and gets blocked trying to take the lock. - time.Sleep(middleDuration * 2) + sleep(middleDuration * 2) job.Cancel() lock.Unlock() } @@ -199,14 +284,14 @@ func TestJobCancelledRescheduleWithoutLock(t *testing.T) { select { case <-ch: t.Fatal("timer fired after being stopped") - case <-time.After(middleDuration * 2): + case <-after(middleDuration * 2): } } func TestManyCancellableTimerResetAfterBlockedOnLock(t *testing.T) { t.Parallel() - clock := tcpip.NewStdClock() + clock, after, sleep := stdClockWithAfterAndSleep() var lock sync.Mutex ch := make(chan struct{}) @@ -215,7 +300,7 @@ func TestManyCancellableTimerResetAfterBlockedOnLock(t *testing.T) { job.Schedule(shortDuration) for i := 0; i < 10; i++ { // Sleep until the timer fires and gets blocked trying to take the lock. - time.Sleep(middleDuration) + sleep(middleDuration) job.Cancel() job.Schedule(shortDuration) } @@ -224,7 +309,7 @@ func TestManyCancellableTimerResetAfterBlockedOnLock(t *testing.T) { // Wait for double the duration for the last timer to fire. select { case <-ch: - case <-time.After(middleDuration): + case <-after(middleDuration): t.Fatal("timed out waiting for timer to fire") } @@ -232,14 +317,14 @@ func TestManyCancellableTimerResetAfterBlockedOnLock(t *testing.T) { select { case <-ch: t.Fatal("no other timers should have fired") - case <-time.After(middleDuration): + case <-after(middleDuration): } } func TestManyJobReschedulesUnderLock(t *testing.T) { t.Parallel() - clock := tcpip.NewStdClock() + clock, after := stdClockWithAfter() var lock sync.Mutex ch := make(chan struct{}) @@ -255,7 +340,7 @@ func TestManyJobReschedulesUnderLock(t *testing.T) { // Wait for double the duration for the last timer to fire. select { case <-ch: - case <-time.After(middleDuration): + case <-after(middleDuration): t.Fatal("timed out waiting for timer to fire") } @@ -263,6 +348,6 @@ func TestManyJobReschedulesUnderLock(t *testing.T) { select { case <-ch: t.Fatal("no other timers should have fired") - case <-time.After(middleDuration): + case <-after(middleDuration): } } diff --git a/pkg/tcpip/transport/icmp/BUILD b/pkg/tcpip/transport/icmp/BUILD index 7e5c79776..bbc0e3ecc 100644 --- a/pkg/tcpip/transport/icmp/BUILD +++ b/pkg/tcpip/transport/icmp/BUILD @@ -1,4 +1,4 @@ -load("//tools:defs.bzl", "go_library") +load("//tools:defs.bzl", "go_library", "go_test") load("//tools/go_generics:defs.bzl", "go_template_instance") package(licenses = ["notice"]) @@ -38,3 +38,22 @@ go_library( "//pkg/waiter", ], ) + +go_test( + name = "icmp_x_test", + size = "small", + srcs = ["icmp_test.go"], + deps = [ + ":icmp", + "//pkg/tcpip", + "//pkg/tcpip/buffer", + "//pkg/tcpip/checker", + "//pkg/tcpip/header", + "//pkg/tcpip/link/channel", + "//pkg/tcpip/link/sniffer", + "//pkg/tcpip/network/ipv4", + "//pkg/tcpip/stack", + "//pkg/tcpip/testutil", + "//pkg/waiter", + ], +) diff --git a/pkg/tcpip/transport/icmp/endpoint.go b/pkg/tcpip/transport/icmp/endpoint.go index 8afde7fca..cb316d27a 100644 --- a/pkg/tcpip/transport/icmp/endpoint.go +++ b/pkg/tcpip/transport/icmp/endpoint.go @@ -16,6 +16,7 @@ package icmp import ( "io" + "time" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" @@ -26,14 +27,12 @@ import ( "gvisor.dev/gvisor/pkg/waiter" ) -// TODO(https://gvisor.dev/issues/5623): Unit test this package. - // +stateify savable type icmpPacket struct { icmpPacketEntry senderAddress tcpip.FullAddress data buffer.VectorisedView `state:".(buffer.VectorisedView)"` - timestamp int64 + receivedAt time.Time `state:".(int64)"` } type endpointState int @@ -133,7 +132,8 @@ func (e *endpoint) Close() { e.shutdownFlags = tcpip.ShutdownRead | tcpip.ShutdownWrite switch e.state { case stateBound, stateConnected: - e.stack.UnregisterTransportEndpoint([]tcpip.NetworkProtocolNumber{e.NetProto}, e.TransProto, e.ID, e, ports.Flags{}, 0 /* bindToDevice */) + bindToDevice := tcpip.NICID(e.ops.GetBindToDevice()) + e.stack.UnregisterTransportEndpoint([]tcpip.NetworkProtocolNumber{e.NetProto}, e.TransProto, e.ID, e, ports.Flags{}, bindToDevice) } // Close the receive list and drain it. @@ -160,7 +160,7 @@ func (e *endpoint) Close() { } // ModerateRecvBuf implements tcpip.Endpoint.ModerateRecvBuf. -func (e *endpoint) ModerateRecvBuf(copied int) {} +func (*endpoint) ModerateRecvBuf(int) {} // SetOwner implements tcpip.Endpoint.SetOwner. func (e *endpoint) SetOwner(owner tcpip.PacketOwner) { @@ -193,7 +193,7 @@ func (e *endpoint) Read(dst io.Writer, opts tcpip.ReadOptions) (tcpip.ReadResult Total: p.data.Size(), ControlMessages: tcpip.ControlMessages{ HasTimestamp: true, - Timestamp: p.timestamp, + Timestamp: p.receivedAt.UnixNano(), }, } if opts.NeedRemoteAddr { @@ -304,6 +304,9 @@ func (e *endpoint) write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, tcp // Reject destination address if it goes through a different // NIC than the endpoint was bound to. nicID := to.NIC + if nicID == 0 { + nicID = tcpip.NICID(e.ops.GetBindToDevice()) + } if e.BindNICID != 0 { if nicID != 0 && nicID != e.BindNICID { return 0, &tcpip.ErrNoRoute{} @@ -348,8 +351,15 @@ func (e *endpoint) write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, tcp return int64(len(v)), nil } +var _ tcpip.SocketOptionsHandler = (*endpoint)(nil) + +// HasNIC implements tcpip.SocketOptionsHandler. +func (e *endpoint) HasNIC(id int32) bool { + return e.stack.HasNIC(tcpip.NICID(id)) +} + // SetSockOpt sets a socket option. -func (e *endpoint) SetSockOpt(opt tcpip.SettableSocketOption) tcpip.Error { +func (*endpoint) SetSockOpt(tcpip.SettableSocketOption) tcpip.Error { return nil } @@ -390,7 +400,7 @@ func (e *endpoint) GetSockOptInt(opt tcpip.SockOptInt) (int, tcpip.Error) { } // GetSockOpt implements tcpip.Endpoint.GetSockOpt. -func (e *endpoint) GetSockOpt(opt tcpip.GettableSocketOption) tcpip.Error { +func (*endpoint) GetSockOpt(tcpip.GettableSocketOption) tcpip.Error { return &tcpip.ErrUnknownProtocolOption{} } @@ -606,18 +616,19 @@ func (*endpoint) Accept(*tcpip.FullAddress) (tcpip.Endpoint, *waiter.Queue, tcpi return nil, nil, &tcpip.ErrNotSupported{} } -func (e *endpoint) registerWithStack(nicID tcpip.NICID, netProtos []tcpip.NetworkProtocolNumber, id stack.TransportEndpointID) (stack.TransportEndpointID, tcpip.Error) { +func (e *endpoint) registerWithStack(_ tcpip.NICID, netProtos []tcpip.NetworkProtocolNumber, id stack.TransportEndpointID) (stack.TransportEndpointID, tcpip.Error) { + bindToDevice := tcpip.NICID(e.ops.GetBindToDevice()) if id.LocalPort != 0 { // The endpoint already has a local port, just attempt to // register it. - err := e.stack.RegisterTransportEndpoint(netProtos, e.TransProto, id, e, ports.Flags{}, 0 /* bindToDevice */) + err := e.stack.RegisterTransportEndpoint(netProtos, e.TransProto, id, e, ports.Flags{}, bindToDevice) return id, err } // We need to find a port for the endpoint. - _, err := e.stack.PickEphemeralPort(func(p uint16) (bool, tcpip.Error) { + _, err := e.stack.PickEphemeralPort(e.stack.Rand(), func(p uint16) (bool, tcpip.Error) { id.LocalPort = p - err := e.stack.RegisterTransportEndpoint(netProtos, e.TransProto, id, e, ports.Flags{}, 0 /* bindtodevice */) + err := e.stack.RegisterTransportEndpoint(netProtos, e.TransProto, id, e, ports.Flags{}, bindToDevice) switch err.(type) { case nil: return true, nil @@ -747,8 +758,6 @@ func (e *endpoint) HandlePacket(id stack.TransportEndpointID, pkt *stack.PacketB switch e.NetProto { case header.IPv4ProtocolNumber: h := header.ICMPv4(pkt.TransportHeader().View()) - // TODO(gvisor.dev/issue/170): Determine if len(h) check is still needed - // after early parsing. if len(h) < header.ICMPv4MinimumSize || h.Type() != header.ICMPv4EchoReply { e.stack.Stats().DroppedPackets.Increment() e.stats.ReceiveErrors.MalformedPacketsReceived.Increment() @@ -756,8 +765,6 @@ func (e *endpoint) HandlePacket(id stack.TransportEndpointID, pkt *stack.PacketB } case header.IPv6ProtocolNumber: h := header.ICMPv6(pkt.TransportHeader().View()) - // TODO(gvisor.dev/issue/170): Determine if len(h) check is still needed - // after early parsing. if len(h) < header.ICMPv6MinimumSize || h.Type() != header.ICMPv6EchoReply { e.stack.Stats().DroppedPackets.Increment() e.stats.ReceiveErrors.MalformedPacketsReceived.Increment() @@ -800,7 +807,7 @@ func (e *endpoint) HandlePacket(id stack.TransportEndpointID, pkt *stack.PacketB e.rcvList.PushBack(packet) e.rcvBufSize += packet.data.Size() - packet.timestamp = e.stack.Clock().NowNanoseconds() + packet.receivedAt = e.stack.Clock().Now() e.rcvMu.Unlock() e.stats.PacketsReceived.Increment() diff --git a/pkg/tcpip/transport/icmp/endpoint_state.go b/pkg/tcpip/transport/icmp/endpoint_state.go index 28a56a2d5..b8b839e4a 100644 --- a/pkg/tcpip/transport/icmp/endpoint_state.go +++ b/pkg/tcpip/transport/icmp/endpoint_state.go @@ -15,11 +15,23 @@ package icmp import ( + "time" + "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" "gvisor.dev/gvisor/pkg/tcpip/stack" ) +// saveReceivedAt is invoked by stateify. +func (p *icmpPacket) saveReceivedAt() int64 { + return p.receivedAt.UnixNano() +} + +// loadReceivedAt is invoked by stateify. +func (p *icmpPacket) loadReceivedAt(nsec int64) { + p.receivedAt = time.Unix(0, nsec) +} + // saveData saves icmpPacket.data field. func (p *icmpPacket) saveData() buffer.VectorisedView { // We cannot save p.data directly as p.data.views may alias to p.views, diff --git a/pkg/tcpip/transport/icmp/icmp_test.go b/pkg/tcpip/transport/icmp/icmp_test.go new file mode 100644 index 000000000..cc950cbde --- /dev/null +++ b/pkg/tcpip/transport/icmp/icmp_test.go @@ -0,0 +1,235 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package icmp_test + +import ( + "testing" + + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/tcpip/buffer" + "gvisor.dev/gvisor/pkg/tcpip/checker" + "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/pkg/tcpip/link/channel" + "gvisor.dev/gvisor/pkg/tcpip/link/sniffer" + "gvisor.dev/gvisor/pkg/tcpip/network/ipv4" + "gvisor.dev/gvisor/pkg/tcpip/stack" + "gvisor.dev/gvisor/pkg/tcpip/testutil" + "gvisor.dev/gvisor/pkg/tcpip/transport/icmp" + "gvisor.dev/gvisor/pkg/waiter" +) + +// TODO(https://gvisor.dev/issues/5623): Finish unit testing the icmp package. +// See the issue for remaining areas of work. + +var ( + localV4Addr1 = testutil.MustParse4("10.0.0.1") + localV4Addr2 = testutil.MustParse4("10.0.0.2") + remoteV4Addr = testutil.MustParse4("10.0.0.3") +) + +func addNICWithDefaultRoute(t *testing.T, s *stack.Stack, id tcpip.NICID, name string, addrV4 tcpip.Address) *channel.Endpoint { + t.Helper() + + ep := channel.New(1 /* size */, header.IPv4MinimumMTU, "" /* linkAddr */) + t.Cleanup(ep.Close) + + wep := stack.LinkEndpoint(ep) + if testing.Verbose() { + wep = sniffer.New(ep) + } + + opts := stack.NICOptions{Name: name} + if err := s.CreateNICWithOptions(id, wep, opts); err != nil { + t.Fatalf("s.CreateNIC(%d, _) = %s", id, err) + } + + if err := s.AddAddress(id, ipv4.ProtocolNumber, addrV4); err != nil { + t.Fatalf("s.AddAddress(%d, %d, %s) = %s", id, ipv4.ProtocolNumber, addrV4, err) + } + + s.AddRoute(tcpip.Route{ + Destination: header.IPv4EmptySubnet, + NIC: id, + }) + + return ep +} + +func writePayload(buf []byte) { + for i := range buf { + buf[i] = byte(i) + } +} + +func newICMPv4EchoRequest(payloadSize uint32) buffer.View { + buf := buffer.NewView(header.ICMPv4MinimumSize + int(payloadSize)) + writePayload(buf[header.ICMPv4MinimumSize:]) + + icmp := header.ICMPv4(buf) + icmp.SetType(header.ICMPv4Echo) + // No need to set the checksum; it is reset by the socket before the packet + // is sent. + + return buf +} + +// TestWriteUnboundWithBindToDevice exercises writing to an unbound ICMP socket +// when SO_BINDTODEVICE is set to the non-default NIC for that subnet. +// +// Only IPv4 is tested. The logic to determine which NIC to use is agnostic to +// the version of IP. +func TestWriteUnboundWithBindToDevice(t *testing.T) { + s := stack.New(stack.Options{ + NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol}, + TransportProtocols: []stack.TransportProtocolFactory{icmp.NewProtocol4}, + HandleLocal: true, + }) + + // Add two NICs, both with default routes on the same subnet. The first NIC + // added will be the default NIC for that subnet. + defaultEP := addNICWithDefaultRoute(t, s, 1, "default", localV4Addr1) + alternateEP := addNICWithDefaultRoute(t, s, 2, "alternate", localV4Addr2) + + socket, err := s.NewEndpoint(icmp.ProtocolNumber4, ipv4.ProtocolNumber, &waiter.Queue{}) + if err != nil { + t.Fatalf("s.NewEndpoint(%d, %d, _) = %s", icmp.ProtocolNumber4, ipv4.ProtocolNumber, err) + } + defer socket.Close() + + echoPayloadSize := defaultEP.MTU() - header.IPv4MinimumSize - header.ICMPv4MinimumSize + + // Send a packet without SO_BINDTODEVICE. This verifies that the first NIC + // to be added is the default NIC to send packets when not explicitly bound. + { + buf := newICMPv4EchoRequest(echoPayloadSize) + r := buf.Reader() + n, err := socket.Write(&r, tcpip.WriteOptions{ + To: &tcpip.FullAddress{Addr: remoteV4Addr}, + }) + if err != nil { + t.Fatalf("socket.Write(_, {To:%s}) = %s", remoteV4Addr, err) + } + if n != int64(len(buf)) { + t.Fatalf("got n = %d, want n = %d", n, len(buf)) + } + + // Verify the packet was sent out the default NIC. + p, ok := defaultEP.Read() + if !ok { + t.Fatalf("got defaultEP.Read(_) = _, false; want = _, true (packet wasn't written out)") + } + + vv := buffer.NewVectorisedView(p.Pkt.Size(), p.Pkt.Views()) + b := vv.ToView() + + checker.IPv4(t, b, []checker.NetworkChecker{ + checker.SrcAddr(localV4Addr1), + checker.DstAddr(remoteV4Addr), + checker.ICMPv4( + checker.ICMPv4Type(header.ICMPv4Echo), + checker.ICMPv4Payload(buf[header.ICMPv4MinimumSize:]), + ), + }...) + + // Verify the packet was not sent out the alternate NIC. + if p, ok := alternateEP.Read(); ok { + t.Fatalf("got alternateEP.Read(_) = %+v, true; want = _, false", p) + } + } + + // Send a packet with SO_BINDTODEVICE. This exercises reliance on + // SO_BINDTODEVICE to route the packet to the alternate NIC. + { + // Use SO_BINDTODEVICE to send over the alternate NIC by default. + socket.SocketOptions().SetBindToDevice(2) + + buf := newICMPv4EchoRequest(echoPayloadSize) + r := buf.Reader() + n, err := socket.Write(&r, tcpip.WriteOptions{ + To: &tcpip.FullAddress{Addr: remoteV4Addr}, + }) + if err != nil { + t.Fatalf("socket.Write(_, {To:%s}) = %s", tcpip.Address(remoteV4Addr), err) + } + if n != int64(len(buf)) { + t.Fatalf("got n = %d, want n = %d", n, len(buf)) + } + + // Verify the packet was not sent out the default NIC. + if p, ok := defaultEP.Read(); ok { + t.Fatalf("got defaultEP.Read(_) = %+v, true; want = _, false", p) + } + + // Verify the packet was sent out the alternate NIC. + p, ok := alternateEP.Read() + if !ok { + t.Fatalf("got alternateEP.Read(_) = _, false; want = _, true (packet wasn't written out)") + } + + vv := buffer.NewVectorisedView(p.Pkt.Size(), p.Pkt.Views()) + b := vv.ToView() + + checker.IPv4(t, b, []checker.NetworkChecker{ + checker.SrcAddr(localV4Addr2), + checker.DstAddr(remoteV4Addr), + checker.ICMPv4( + checker.ICMPv4Type(header.ICMPv4Echo), + checker.ICMPv4Payload(buf[header.ICMPv4MinimumSize:]), + ), + }...) + } + + // Send a packet with SO_BINDTODEVICE cleared. This verifies that clearing + // the device binding will fallback to using the default NIC to send + // packets. + { + socket.SocketOptions().SetBindToDevice(0) + + buf := newICMPv4EchoRequest(echoPayloadSize) + r := buf.Reader() + n, err := socket.Write(&r, tcpip.WriteOptions{ + To: &tcpip.FullAddress{Addr: remoteV4Addr}, + }) + if err != nil { + t.Fatalf("socket.Write(_, {To:%s}) = %s", tcpip.Address(remoteV4Addr), err) + } + if n != int64(len(buf)) { + t.Fatalf("got n = %d, want n = %d", n, len(buf)) + } + + // Verify the packet was sent out the default NIC. + p, ok := defaultEP.Read() + if !ok { + t.Fatalf("got defaultEP.Read(_) = _, false; want = _, true (packet wasn't written out)") + } + + vv := buffer.NewVectorisedView(p.Pkt.Size(), p.Pkt.Views()) + b := vv.ToView() + + checker.IPv4(t, b, []checker.NetworkChecker{ + checker.SrcAddr(localV4Addr1), + checker.DstAddr(remoteV4Addr), + checker.ICMPv4( + checker.ICMPv4Type(header.ICMPv4Echo), + checker.ICMPv4Payload(buf[header.ICMPv4MinimumSize:]), + ), + }...) + + // Verify the packet was not sent out the alternate NIC. + if p, ok := alternateEP.Read(); ok { + t.Fatalf("got alternateEP.Read(_) = %+v, true; want = _, false", p) + } + } +} diff --git a/pkg/tcpip/transport/icmp/protocol.go b/pkg/tcpip/transport/icmp/protocol.go index 47f7dd1cb..fa82affc1 100644 --- a/pkg/tcpip/transport/icmp/protocol.go +++ b/pkg/tcpip/transport/icmp/protocol.go @@ -123,8 +123,6 @@ func (*protocol) Wait() {} // Parse implements stack.TransportProtocol.Parse. func (*protocol) Parse(pkt *stack.PacketBuffer) bool { - // TODO(gvisor.dev/issue/170): Implement parsing of ICMP. - // // Right now, the Parse() method is tied to enabled protocols passed into // stack.New. This works for UDP and TCP, but we handle ICMP traffic even // when netstack users don't pass ICMP as a supported protocol. diff --git a/pkg/tcpip/transport/packet/endpoint.go b/pkg/tcpip/transport/packet/endpoint.go index 496eca581..cd8c99d41 100644 --- a/pkg/tcpip/transport/packet/endpoint.go +++ b/pkg/tcpip/transport/packet/endpoint.go @@ -27,6 +27,7 @@ package packet import ( "fmt" "io" + "time" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" @@ -41,9 +42,8 @@ type packet struct { packetEntry // data holds the actual packet data, including any headers and // payload. - data buffer.VectorisedView `state:".(buffer.VectorisedView)"` - // timestampNS is the unix time at which the packet was received. - timestampNS int64 + data buffer.VectorisedView `state:".(buffer.VectorisedView)"` + receivedAt time.Time `state:".(int64)"` // senderAddr is the network address of the sender. senderAddr tcpip.FullAddress // packetInfo holds additional information like the protocol @@ -159,7 +159,7 @@ func (ep *endpoint) Close() { } // ModerateRecvBuf implements tcpip.Endpoint.ModerateRecvBuf. -func (ep *endpoint) ModerateRecvBuf(copied int) {} +func (*endpoint) ModerateRecvBuf(int) {} // Read implements tcpip.Endpoint.Read. func (ep *endpoint) Read(dst io.Writer, opts tcpip.ReadOptions) (tcpip.ReadResult, tcpip.Error) { @@ -189,7 +189,7 @@ func (ep *endpoint) Read(dst io.Writer, opts tcpip.ReadOptions) (tcpip.ReadResul Total: packet.data.Size(), ControlMessages: tcpip.ControlMessages{ HasTimestamp: true, - Timestamp: packet.timestampNS, + Timestamp: packet.receivedAt.UnixNano(), }, } if opts.NeedRemoteAddr { @@ -220,19 +220,19 @@ func (*endpoint) Disconnect() tcpip.Error { // Connect implements tcpip.Endpoint.Connect. Packet sockets cannot be // connected, and this function always returnes *tcpip.ErrNotSupported. -func (*endpoint) Connect(addr tcpip.FullAddress) tcpip.Error { +func (*endpoint) Connect(tcpip.FullAddress) tcpip.Error { return &tcpip.ErrNotSupported{} } // Shutdown implements tcpip.Endpoint.Shutdown. Packet sockets cannot be used // with Shutdown, and this function always returns *tcpip.ErrNotSupported. -func (*endpoint) Shutdown(flags tcpip.ShutdownFlags) tcpip.Error { +func (*endpoint) Shutdown(tcpip.ShutdownFlags) tcpip.Error { return &tcpip.ErrNotSupported{} } // Listen implements tcpip.Endpoint.Listen. Packet sockets cannot be used with // Listen, and this function always returns *tcpip.ErrNotSupported. -func (*endpoint) Listen(backlog int) tcpip.Error { +func (*endpoint) Listen(int) tcpip.Error { return &tcpip.ErrNotSupported{} } @@ -318,7 +318,7 @@ func (ep *endpoint) SetSockOpt(opt tcpip.SettableSocketOption) tcpip.Error { } // SetSockOptInt implements tcpip.Endpoint.SetSockOptInt. -func (ep *endpoint) SetSockOptInt(opt tcpip.SockOptInt, v int) tcpip.Error { +func (*endpoint) SetSockOptInt(tcpip.SockOptInt, int) tcpip.Error { return &tcpip.ErrUnknownProtocolOption{} } @@ -339,7 +339,7 @@ func (ep *endpoint) UpdateLastError(err tcpip.Error) { } // GetSockOpt implements tcpip.Endpoint.GetSockOpt. -func (ep *endpoint) GetSockOpt(opt tcpip.GettableSocketOption) tcpip.Error { +func (*endpoint) GetSockOpt(tcpip.GettableSocketOption) tcpip.Error { return &tcpip.ErrNotSupported{} } @@ -451,7 +451,7 @@ func (ep *endpoint) HandlePacket(nicID tcpip.NICID, localAddr tcpip.LinkAddress, packet.data = buffer.NewVectorisedView(pkt.Size(), pkt.Views()) } } - packet.timestampNS = ep.stack.Clock().NowNanoseconds() + packet.receivedAt = ep.stack.Clock().Now() ep.rcvList.PushBack(&packet) ep.rcvBufSize += packet.data.Size() @@ -484,7 +484,7 @@ func (ep *endpoint) Stats() tcpip.EndpointStats { } // SetOwner implements tcpip.Endpoint.SetOwner. -func (ep *endpoint) SetOwner(owner tcpip.PacketOwner) {} +func (*endpoint) SetOwner(tcpip.PacketOwner) {} // SocketOptions implements tcpip.Endpoint.SocketOptions. func (ep *endpoint) SocketOptions() *tcpip.SocketOptions { diff --git a/pkg/tcpip/transport/packet/endpoint_state.go b/pkg/tcpip/transport/packet/endpoint_state.go index 5bd860d20..e729921db 100644 --- a/pkg/tcpip/transport/packet/endpoint_state.go +++ b/pkg/tcpip/transport/packet/endpoint_state.go @@ -15,11 +15,23 @@ package packet import ( + "time" + "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" "gvisor.dev/gvisor/pkg/tcpip/stack" ) +// saveReceivedAt is invoked by stateify. +func (p *packet) saveReceivedAt() int64 { + return p.receivedAt.UnixNano() +} + +// loadReceivedAt is invoked by stateify. +func (p *packet) loadReceivedAt(nsec int64) { + p.receivedAt = time.Unix(0, nsec) +} + // saveData saves packet.data field. func (p *packet) saveData() buffer.VectorisedView { // We cannot save p.data directly as p.data.views may alias to p.views, diff --git a/pkg/tcpip/transport/raw/endpoint.go b/pkg/tcpip/transport/raw/endpoint.go index bcec3d2e7..1bce2769a 100644 --- a/pkg/tcpip/transport/raw/endpoint.go +++ b/pkg/tcpip/transport/raw/endpoint.go @@ -27,6 +27,7 @@ package raw import ( "io" + "time" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" @@ -41,9 +42,8 @@ type rawPacket struct { rawPacketEntry // data holds the actual packet data, including any headers and // payload. - data buffer.VectorisedView `state:".(buffer.VectorisedView)"` - // timestampNS is the unix time at which the packet was received. - timestampNS int64 + data buffer.VectorisedView `state:".(buffer.VectorisedView)"` + receivedAt time.Time `state:".(int64)"` // senderAddr is the network address of the sender. senderAddr tcpip.FullAddress } @@ -183,7 +183,7 @@ func (e *endpoint) Close() { } // ModerateRecvBuf implements tcpip.Endpoint.ModerateRecvBuf. -func (e *endpoint) ModerateRecvBuf(copied int) {} +func (*endpoint) ModerateRecvBuf(int) {} func (e *endpoint) SetOwner(owner tcpip.PacketOwner) { e.mu.Lock() @@ -219,7 +219,7 @@ func (e *endpoint) Read(dst io.Writer, opts tcpip.ReadOptions) (tcpip.ReadResult Total: pkt.data.Size(), ControlMessages: tcpip.ControlMessages{ HasTimestamp: true, - Timestamp: pkt.timestampNS, + Timestamp: pkt.receivedAt.UnixNano(), }, } if opts.NeedRemoteAddr { @@ -402,7 +402,7 @@ func (e *endpoint) Connect(addr tcpip.FullAddress) tcpip.Error { } // Find a route to the destination. - route, err := e.stack.FindRoute(nic, tcpip.Address(""), addr.Addr, e.NetProto, false) + route, err := e.stack.FindRoute(nic, "", addr.Addr, e.NetProto, false) if err != nil { return err } @@ -428,7 +428,7 @@ func (e *endpoint) Connect(addr tcpip.FullAddress) tcpip.Error { } // Shutdown implements tcpip.Endpoint.Shutdown. It's a noop for raw sockets. -func (e *endpoint) Shutdown(flags tcpip.ShutdownFlags) tcpip.Error { +func (e *endpoint) Shutdown(tcpip.ShutdownFlags) tcpip.Error { e.mu.Lock() defer e.mu.Unlock() @@ -439,7 +439,7 @@ func (e *endpoint) Shutdown(flags tcpip.ShutdownFlags) tcpip.Error { } // Listen implements tcpip.Endpoint.Listen. -func (*endpoint) Listen(backlog int) tcpip.Error { +func (*endpoint) Listen(int) tcpip.Error { return &tcpip.ErrNotSupported{} } @@ -513,12 +513,12 @@ func (e *endpoint) SetSockOpt(opt tcpip.SettableSocketOption) tcpip.Error { } } -func (e *endpoint) SetSockOptInt(opt tcpip.SockOptInt, v int) tcpip.Error { +func (*endpoint) SetSockOptInt(tcpip.SockOptInt, int) tcpip.Error { return &tcpip.ErrUnknownProtocolOption{} } // GetSockOpt implements tcpip.Endpoint.GetSockOpt. -func (e *endpoint) GetSockOpt(opt tcpip.GettableSocketOption) tcpip.Error { +func (*endpoint) GetSockOpt(tcpip.GettableSocketOption) tcpip.Error { return &tcpip.ErrUnknownProtocolOption{} } @@ -621,7 +621,7 @@ func (e *endpoint) HandlePacket(pkt *stack.PacketBuffer) { } combinedVV.Append(pkt.Data().ExtractVV()) packet.data = combinedVV - packet.timestampNS = e.stack.Clock().NowNanoseconds() + packet.receivedAt = e.stack.Clock().Now() e.rcvList.PushBack(packet) e.rcvBufSize += packet.data.Size() diff --git a/pkg/tcpip/transport/raw/endpoint_state.go b/pkg/tcpip/transport/raw/endpoint_state.go index 5d6f2709c..39669b445 100644 --- a/pkg/tcpip/transport/raw/endpoint_state.go +++ b/pkg/tcpip/transport/raw/endpoint_state.go @@ -15,11 +15,23 @@ package raw import ( + "time" + "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" "gvisor.dev/gvisor/pkg/tcpip/stack" ) +// saveReceivedAt is invoked by stateify. +func (p *rawPacket) saveReceivedAt() int64 { + return p.receivedAt.UnixNano() +} + +// loadReceivedAt is invoked by stateify. +func (p *rawPacket) loadReceivedAt(nsec int64) { + p.receivedAt = time.Unix(0, nsec) +} + // saveData saves rawPacket.data field. func (p *rawPacket) saveData() buffer.VectorisedView { // We cannot save p.data directly as p.data.views may alias to p.views, diff --git a/pkg/tcpip/transport/tcp/BUILD b/pkg/tcpip/transport/tcp/BUILD index 0f20d3856..8436d2cf0 100644 --- a/pkg/tcpip/transport/tcp/BUILD +++ b/pkg/tcpip/transport/tcp/BUILD @@ -41,7 +41,6 @@ go_library( "protocol.go", "rack.go", "rcv.go", - "rcv_state.go", "reno.go", "reno_recovery.go", "sack.go", @@ -53,7 +52,6 @@ go_library( "segment_state.go", "segment_unsafe.go", "snd.go", - "snd_state.go", "tcp_endpoint_list.go", "tcp_segment_list.go", "timer.go", @@ -134,6 +132,7 @@ go_test( deps = [ "//pkg/sleep", "//pkg/tcpip/buffer", + "//pkg/tcpip/faketime", "//pkg/tcpip/stack", "@com_github_google_go_cmp//cmp:go_default_library", ], diff --git a/pkg/tcpip/transport/tcp/accept.go b/pkg/tcpip/transport/tcp/accept.go index d4bd4e80e..d807b13b7 100644 --- a/pkg/tcpip/transport/tcp/accept.go +++ b/pkg/tcpip/transport/tcp/accept.go @@ -114,8 +114,8 @@ type listenContext struct { } // timeStamp returns an 8-bit timestamp with a granularity of 64 seconds. -func timeStamp() uint32 { - return uint32(time.Now().Unix()>>6) & tsMask +func timeStamp(clock tcpip.Clock) uint32 { + return uint32(clock.NowMonotonic().Sub(tcpip.MonotonicTime{}).Seconds()) >> 6 & tsMask } // newListenContext creates a new listen context. @@ -171,7 +171,7 @@ func (l *listenContext) cookieHash(id stack.TransportEndpointID, ts uint32, nonc // createCookie creates a SYN cookie for the given id and incoming sequence // number. func (l *listenContext) createCookie(id stack.TransportEndpointID, seq seqnum.Value, data uint32) seqnum.Value { - ts := timeStamp() + ts := timeStamp(l.stack.Clock()) v := l.cookieHash(id, 0, 0) + uint32(seq) + (ts << tsOffset) v += (l.cookieHash(id, ts, 1) + data) & hashMask return seqnum.Value(v) @@ -181,7 +181,7 @@ func (l *listenContext) createCookie(id stack.TransportEndpointID, seq seqnum.Va // sequence number. If it is, it also returns the data originally encoded in the // cookie when createCookie was called. func (l *listenContext) isCookieValid(id stack.TransportEndpointID, cookie seqnum.Value, seq seqnum.Value) (uint32, bool) { - ts := timeStamp() + ts := timeStamp(l.stack.Clock()) v := uint32(cookie) - l.cookieHash(id, 0, 0) - uint32(seq) cookieTS := v >> tsOffset if ((ts - cookieTS) & tsMask) > maxTSDiff { @@ -247,7 +247,7 @@ func (l *listenContext) createConnectingEndpoint(s *segment, rcvdSynOpts *header func (l *listenContext) startHandshake(s *segment, opts *header.TCPSynOptions, queue *waiter.Queue, owner tcpip.PacketOwner) (*handshake, tcpip.Error) { // Create new endpoint. irs := s.sequenceNumber - isn := generateSecureISN(s.id, l.stack.Seed()) + isn := generateSecureISN(s.id, l.stack.Clock(), l.stack.Seed()) ep, err := l.createConnectingEndpoint(s, opts, queue) if err != nil { return nil, err @@ -550,7 +550,7 @@ func (e *endpoint) handleListenSegment(ctx *listenContext, s *segment) tcpip.Err e.rcvQueueInfo.rcvQueueMu.Lock() rcvClosed := e.rcvQueueInfo.RcvClosed e.rcvQueueInfo.rcvQueueMu.Unlock() - if rcvClosed || s.flagsAreSet(header.TCPFlagSyn|header.TCPFlagAck) { + if rcvClosed || s.flags.Contains(header.TCPFlagSyn|header.TCPFlagAck) { // If the endpoint is shutdown, reply with reset. // // RFC 793 section 3.4 page 35 (figure 12) outlines that a RST @@ -560,6 +560,10 @@ func (e *endpoint) handleListenSegment(ctx *listenContext, s *segment) tcpip.Err } switch { + case s.flags.Contains(header.TCPFlagRst): + e.stack.Stats().DroppedPackets.Increment() + return nil + case s.flags == header.TCPFlagSyn: if e.acceptQueueIsFull() { e.stack.Stats().TCP.ListenOverflowSynDrop.Increment() @@ -591,7 +595,7 @@ func (e *endpoint) handleListenSegment(ctx *listenContext, s *segment) tcpip.Err synOpts := header.TCPSynOptions{ WS: -1, TS: opts.TS, - TSVal: tcpTimeStamp(time.Now(), timeStampOffset()), + TSVal: tcpTimeStamp(e.stack.Clock().NowMonotonic(), timeStampOffset(e.stack.Rand())), TSEcr: opts.TSVal, MSS: calculateAdvertisedMSS(e.userMSS, route), } @@ -611,7 +615,7 @@ func (e *endpoint) handleListenSegment(ctx *listenContext, s *segment) tcpip.Err e.stack.Stats().TCP.ListenOverflowSynCookieSent.Increment() return nil - case (s.flags & header.TCPFlagAck) != 0: + case s.flags.Contains(header.TCPFlagAck): if e.acceptQueueIsFull() { // Silently drop the ack as the application can't accept // the connection at this point. The ack will be @@ -736,6 +740,13 @@ func (e *endpoint) handleListenSegment(ctx *listenContext, s *segment) tcpip.Err mss: rcvdSynOptions.MSS, }) + // Requeue the segment if the ACK completing the handshake has more info + // to be procesed by the newly established endpoint. + if (s.flags.Contains(header.TCPFlagFin) || s.data.Size() > 0) && n.enqueueSegment(s) { + s.incRef() + n.newSegmentWaker.Assert() + } + // Do the delivery in a separate goroutine so // that we don't block the listen loop in case // the application is slow to accept or stops @@ -753,6 +764,7 @@ func (e *endpoint) handleListenSegment(ctx *listenContext, s *segment) tcpip.Err return nil default: + e.stack.Stats().DroppedPackets.Increment() return nil } } diff --git a/pkg/tcpip/transport/tcp/connect.go b/pkg/tcpip/transport/tcp/connect.go index 5e03e7715..2137ebc25 100644 --- a/pkg/tcpip/transport/tcp/connect.go +++ b/pkg/tcpip/transport/tcp/connect.go @@ -19,7 +19,6 @@ import ( "math" "time" - "gvisor.dev/gvisor/pkg/rand" "gvisor.dev/gvisor/pkg/sleep" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" @@ -92,7 +91,7 @@ type handshake struct { rcvWndScale int // startTime is the time at which the first SYN/SYN-ACK was sent. - startTime time.Time + startTime tcpip.MonotonicTime // deferAccept if non-zero will drop the final ACK for a passive // handshake till an ACK segment with data is received or the timeout is @@ -147,21 +146,16 @@ func FindWndScale(wnd seqnum.Size) int { // resetState resets the state of the handshake object such that it becomes // ready for a new 3-way handshake. func (h *handshake) resetState() { - b := make([]byte, 4) - if _, err := rand.Read(b); err != nil { - panic(err) - } - h.state = handshakeSynSent h.flags = header.TCPFlagSyn h.ackNum = 0 h.mss = 0 - h.iss = generateSecureISN(h.ep.TransportEndpointInfo.ID, h.ep.stack.Seed()) + h.iss = generateSecureISN(h.ep.TransportEndpointInfo.ID, h.ep.stack.Clock(), h.ep.stack.Seed()) } // generateSecureISN generates a secure Initial Sequence number based on the // recommendation here https://tools.ietf.org/html/rfc6528#page-3. -func generateSecureISN(id stack.TransportEndpointID, seed uint32) seqnum.Value { +func generateSecureISN(id stack.TransportEndpointID, clock tcpip.Clock, seed uint32) seqnum.Value { isnHasher := jenkins.Sum32(seed) isnHasher.Write([]byte(id.LocalAddress)) isnHasher.Write([]byte(id.RemoteAddress)) @@ -180,7 +174,7 @@ func generateSecureISN(id stack.TransportEndpointID, seed uint32) seqnum.Value { // // Which sort of guarantees that we won't reuse the ISN for a new // connection for the same tuple for at least 274s. - isn := isnHasher.Sum32() + uint32(time.Now().UnixNano()>>6) + isn := isnHasher.Sum32() + uint32(clock.NowMonotonic().Sub(tcpip.MonotonicTime{}).Nanoseconds()>>6) return seqnum.Value(isn) } @@ -212,7 +206,7 @@ func (h *handshake) resetToSynRcvd(iss seqnum.Value, irs seqnum.Value, opts *hea // a TCP 3-way handshake is valid. If it's not, a RST segment is sent back in // response. func (h *handshake) checkAck(s *segment) bool { - if s.flagIsSet(header.TCPFlagAck) && s.ackNumber != h.iss+1 { + if s.flags.Contains(header.TCPFlagAck) && s.ackNumber != h.iss+1 { // RFC 793, page 36, states that a reset must be generated when // the connection is in any non-synchronized state and an // incoming segment acknowledges something not yet sent. The @@ -230,8 +224,8 @@ func (h *handshake) checkAck(s *segment) bool { func (h *handshake) synSentState(s *segment) tcpip.Error { // RFC 793, page 37, states that in the SYN-SENT state, a reset is // acceptable if the ack field acknowledges the SYN. - if s.flagIsSet(header.TCPFlagRst) { - if s.flagIsSet(header.TCPFlagAck) && s.ackNumber == h.iss+1 { + if s.flags.Contains(header.TCPFlagRst) { + if s.flags.Contains(header.TCPFlagAck) && s.ackNumber == h.iss+1 { // RFC 793, page 67, states that "If the RST bit is set [and] If the ACK // was acceptable then signal the user "error: connection reset", drop // the segment, enter CLOSED state, delete TCB, and return." @@ -249,7 +243,7 @@ func (h *handshake) synSentState(s *segment) tcpip.Error { // We are in the SYN-SENT state. We only care about segments that have // the SYN flag. - if !s.flagIsSet(header.TCPFlagSyn) { + if !s.flags.Contains(header.TCPFlagSyn) { return nil } @@ -270,7 +264,7 @@ func (h *handshake) synSentState(s *segment) tcpip.Error { // If this is a SYN ACK response, we only need to acknowledge the SYN // and the handshake is completed. - if s.flagIsSet(header.TCPFlagAck) { + if s.flags.Contains(header.TCPFlagAck) { h.state = handshakeCompleted h.ep.transitionToStateEstablishedLocked(h) @@ -316,7 +310,7 @@ func (h *handshake) synSentState(s *segment) tcpip.Error { // synRcvdState handles a segment received when the TCP 3-way handshake is in // the SYN-RCVD state. func (h *handshake) synRcvdState(s *segment) tcpip.Error { - if s.flagIsSet(header.TCPFlagRst) { + if s.flags.Contains(header.TCPFlagRst) { // RFC 793, page 37, states that in the SYN-RCVD state, a reset // is acceptable if the sequence number is in the window. if s.sequenceNumber.InWindow(h.ackNum, h.rcvWnd) { @@ -340,13 +334,13 @@ func (h *handshake) synRcvdState(s *segment) tcpip.Error { return nil } - if s.flagIsSet(header.TCPFlagSyn) && s.sequenceNumber != h.ackNum-1 { + if s.flags.Contains(header.TCPFlagSyn) && s.sequenceNumber != h.ackNum-1 { // We received two SYN segments with different sequence // numbers, so we reset this and restart the whole // process, except that we don't reset the timer. ack := s.sequenceNumber.Add(s.logicalLen()) seq := seqnum.Value(0) - if s.flagIsSet(header.TCPFlagAck) { + if s.flags.Contains(header.TCPFlagAck) { seq = s.ackNumber } h.ep.sendRaw(buffer.VectorisedView{}, header.TCPFlagRst|header.TCPFlagAck, seq, ack, 0) @@ -378,10 +372,10 @@ func (h *handshake) synRcvdState(s *segment) tcpip.Error { // We have previously received (and acknowledged) the peer's SYN. If the // peer acknowledges our SYN, the handshake is completed. - if s.flagIsSet(header.TCPFlagAck) { + if s.flags.Contains(header.TCPFlagAck) { // If deferAccept is not zero and this is a bare ACK and the // timeout is not hit then drop the ACK. - if h.deferAccept != 0 && s.data.Size() == 0 && time.Since(h.startTime) < h.deferAccept { + if h.deferAccept != 0 && s.data.Size() == 0 && h.ep.stack.Clock().NowMonotonic().Sub(h.startTime) < h.deferAccept { h.acked = true h.ep.stack.Stats().DroppedPackets.Increment() return nil @@ -412,11 +406,11 @@ func (h *handshake) synRcvdState(s *segment) tcpip.Error { h.ep.transitionToStateEstablishedLocked(h) - // If the segment has data then requeue it for the receiver - // to process it again once main loop is started. - if s.data.Size() > 0 { + // Requeue the segment if the ACK completing the handshake has more info + // to be procesed by the newly established endpoint. + if (s.flags.Contains(header.TCPFlagFin) || s.data.Size() > 0) && h.ep.enqueueSegment(s) { s.incRef() - h.ep.enqueueSegment(s) + h.ep.newSegmentWaker.Assert() } return nil } @@ -426,7 +420,7 @@ func (h *handshake) synRcvdState(s *segment) tcpip.Error { func (h *handshake) handleSegment(s *segment) tcpip.Error { h.sndWnd = s.window - if !s.flagIsSet(header.TCPFlagSyn) && h.sndWndScale > 0 { + if !s.flags.Contains(header.TCPFlagSyn) && h.sndWndScale > 0 { h.sndWnd <<= uint8(h.sndWndScale) } @@ -474,7 +468,7 @@ func (h *handshake) processSegments() tcpip.Error { // start sends the first SYN/SYN-ACK. It does not block, even if link address // resolution is required. func (h *handshake) start() { - h.startTime = time.Now() + h.startTime = h.ep.stack.Clock().NowMonotonic() h.ep.amss = calculateAdvertisedMSS(h.ep.userMSS, h.ep.route) var sackEnabled tcpip.TCPSACKEnabled if err := h.ep.stack.TransportProtocolOption(ProtocolNumber, &sackEnabled); err != nil { @@ -527,7 +521,7 @@ func (h *handshake) complete() tcpip.Error { defer s.Done() // Initialize the resend timer. - timer, err := newBackoffTimer(time.Second, MaxRTO, resendWaker.Assert) + timer, err := newBackoffTimer(h.ep.stack.Clock(), time.Second, MaxRTO, resendWaker.Assert) if err != nil { return err } @@ -552,7 +546,7 @@ func (h *handshake) complete() tcpip.Error { // The last is required to provide a way for the peer to complete // the connection with another ACK or data (as ACKs are never // retransmitted on their own). - if h.active || !h.acked || h.deferAccept != 0 && time.Since(h.startTime) > h.deferAccept { + if h.active || !h.acked || h.deferAccept != 0 && h.ep.stack.Clock().NowMonotonic().Sub(h.startTime) > h.deferAccept { h.ep.sendSynTCP(h.ep.route, tcpFields{ id: h.ep.TransportEndpointInfo.ID, ttl: h.ep.ttl, @@ -608,15 +602,15 @@ func (h *handshake) complete() tcpip.Error { type backoffTimer struct { timeout time.Duration maxTimeout time.Duration - t *time.Timer + t tcpip.Timer } -func newBackoffTimer(timeout, maxTimeout time.Duration, f func()) (*backoffTimer, tcpip.Error) { +func newBackoffTimer(clock tcpip.Clock, timeout, maxTimeout time.Duration, f func()) (*backoffTimer, tcpip.Error) { if timeout > maxTimeout { return nil, &tcpip.ErrTimeout{} } bt := &backoffTimer{timeout: timeout, maxTimeout: maxTimeout} - bt.t = time.AfterFunc(timeout, f) + bt.t = clock.AfterFunc(timeout, f) return bt, nil } @@ -634,7 +628,7 @@ func (bt *backoffTimer) stop() { } func parseSynSegmentOptions(s *segment) header.TCPSynOptions { - synOpts := header.ParseSynOptions(s.options, s.flagIsSet(header.TCPFlagAck)) + synOpts := header.ParseSynOptions(s.options, s.flags.Contains(header.TCPFlagAck)) if synOpts.TS { s.parsedOptions.TSVal = synOpts.TSVal s.parsedOptions.TSEcr = synOpts.TSEcr @@ -1188,11 +1182,11 @@ func (e *endpoint) handleSegmentLocked(s *segment) (cont bool, err tcpip.Error) // the TCPEndpointState after the segment is processed. defer e.probeSegmentLocked() - if s.flagIsSet(header.TCPFlagRst) { + if s.flags.Contains(header.TCPFlagRst) { if ok, err := e.handleReset(s); !ok { return false, err } - } else if s.flagIsSet(header.TCPFlagSyn) { + } else if s.flags.Contains(header.TCPFlagSyn) { // See: https://tools.ietf.org/html/rfc5961#section-4.1 // 1) If the SYN bit is set, irrespective of the sequence number, TCP // MUST send an ACK (also referred to as challenge ACK) to the remote @@ -1216,7 +1210,7 @@ func (e *endpoint) handleSegmentLocked(s *segment) (cont bool, err tcpip.Error) // should then rely on SYN retransmission from the remote end to // re-establish the connection. e.snd.maybeSendOutOfWindowAck(s) - } else if s.flagIsSet(header.TCPFlagAck) { + } else if s.flags.Contains(header.TCPFlagAck) { // Patch the window size in the segment according to the // send window scale. s.window <<= e.snd.SndWndScale @@ -1235,7 +1229,7 @@ func (e *endpoint) handleSegmentLocked(s *segment) (cont bool, err tcpip.Error) // Now check if the received segment has caused us to transition // to a CLOSED state, if yes then terminate processing and do // not invoke the sender. - state := e.state + state := e.EndpointState() if state == StateClose { // When we get into StateClose while processing from the queue, // return immediately and let the protocolMainloop handle it. @@ -1267,7 +1261,7 @@ func (e *endpoint) keepaliveTimerExpired() tcpip.Error { // If a userTimeout is set then abort the connection if it is // exceeded. - if userTimeout != 0 && time.Since(e.rcv.lastRcvdAckTime) >= userTimeout && e.keepalive.unacked > 0 { + if userTimeout != 0 && e.stack.Clock().NowMonotonic().Sub(e.rcv.lastRcvdAckTime) >= userTimeout && e.keepalive.unacked > 0 { e.keepalive.Unlock() e.stack.Stats().TCP.EstablishedTimedout.Increment() return &tcpip.ErrTimeout{} @@ -1322,7 +1316,7 @@ func (e *endpoint) disableKeepaliveTimer() { // segments. func (e *endpoint) protocolMainLoop(handshake bool, wakerInitDone chan<- struct{}) tcpip.Error { e.mu.Lock() - var closeTimer *time.Timer + var closeTimer tcpip.Timer var closeWaker sleep.Waker epilogue := func() { @@ -1480,11 +1474,19 @@ func (e *endpoint) protocolMainLoop(handshake bool, wakerInitDone chan<- struct{ return &tcpip.ErrConnectionReset{} } - if n¬ifyClose != 0 && closeTimer == nil { - if e.EndpointState() == StateFinWait2 && e.closed { + if n¬ifyClose != 0 && e.closed { + switch e.EndpointState() { + case StateEstablished: + // Perform full shutdown if the endpoint is still + // established. This can occur when notifyClose + // was asserted just before becoming established. + e.shutdownLocked(tcpip.ShutdownWrite | tcpip.ShutdownRead) + case StateFinWait2: // The socket has been closed and we are in FIN_WAIT2 // so start the FIN_WAIT2 timer. - closeTimer = time.AfterFunc(e.tcpLingerTimeout, closeWaker.Assert) + if closeTimer == nil { + closeTimer = e.stack.Clock().AfterFunc(e.tcpLingerTimeout, closeWaker.Assert) + } } } @@ -1721,7 +1723,7 @@ func (e *endpoint) doTimeWait() (twReuse func()) { var timeWaitWaker sleep.Waker s.AddWaker(&timeWaitWaker, timeWaitDone) - timeWaitTimer := time.AfterFunc(timeWaitDuration, timeWaitWaker.Assert) + timeWaitTimer := e.stack.Clock().AfterFunc(timeWaitDuration, timeWaitWaker.Assert) defer timeWaitTimer.Stop() for { diff --git a/pkg/tcpip/transport/tcp/cubic.go b/pkg/tcpip/transport/tcp/cubic.go index 962f1d687..6985194bb 100644 --- a/pkg/tcpip/transport/tcp/cubic.go +++ b/pkg/tcpip/transport/tcp/cubic.go @@ -41,7 +41,7 @@ type cubicState struct { func newCubicCC(s *sender) *cubicState { return &cubicState{ TCPCubicState: stack.TCPCubicState{ - T: time.Now(), + T: s.ep.stack.Clock().NowMonotonic(), Beta: 0.7, C: 0.4, }, @@ -60,7 +60,7 @@ func (c *cubicState) enterCongestionAvoidance() { // https://tools.ietf.org/html/rfc8312#section-4.8 if c.numCongestionEvents == 0 { c.K = 0 - c.T = time.Now() + c.T = c.s.ep.stack.Clock().NowMonotonic() c.WLastMax = c.WMax c.WMax = float64(c.s.SndCwnd) } @@ -115,14 +115,15 @@ func (c *cubicState) cubicCwnd(t float64) float64 { // getCwnd returns the current congestion window as computed by CUBIC. // Refer: https://tools.ietf.org/html/rfc8312#section-4 func (c *cubicState) getCwnd(packetsAcked, sndCwnd int, srtt time.Duration) int { - elapsed := time.Since(c.T).Seconds() + elapsed := c.s.ep.stack.Clock().NowMonotonic().Sub(c.T) + elapsedSeconds := elapsed.Seconds() // Compute the window as per Cubic after 'elapsed' time // since last congestion event. - c.WC = c.cubicCwnd(elapsed - c.K) + c.WC = c.cubicCwnd(elapsedSeconds - c.K) // Compute the TCP friendly estimate of the congestion window. - c.WEst = c.WMax*c.Beta + (3.0*((1.0-c.Beta)/(1.0+c.Beta)))*(elapsed/srtt.Seconds()) + c.WEst = c.WMax*c.Beta + (3.0*((1.0-c.Beta)/(1.0+c.Beta)))*(elapsedSeconds/srtt.Seconds()) // Make sure in the TCP friendly region CUBIC performs at least // as well as Reno. @@ -134,7 +135,7 @@ func (c *cubicState) getCwnd(packetsAcked, sndCwnd int, srtt time.Duration) int // In Concave/Convex region of CUBIC, calculate what CUBIC window // will be after 1 RTT and use that to grow congestion window // for every ack. - tEst := (time.Since(c.T) + srtt).Seconds() + tEst := (elapsed + srtt).Seconds() wtRtt := c.cubicCwnd(tEst - c.K) // As per 4.3 for each received ACK cwnd must be incremented // by (w_cubic(t+RTT) - cwnd/cwnd. @@ -151,7 +152,7 @@ func (c *cubicState) getCwnd(packetsAcked, sndCwnd int, srtt time.Duration) int func (c *cubicState) HandleLossDetected() { // See: https://tools.ietf.org/html/rfc8312#section-4.5 c.numCongestionEvents++ - c.T = time.Now() + c.T = c.s.ep.stack.Clock().NowMonotonic() c.WLastMax = c.WMax c.WMax = float64(c.s.SndCwnd) @@ -162,7 +163,7 @@ func (c *cubicState) HandleLossDetected() { // HandleRTOExpired implements congestionContrl.HandleRTOExpired. func (c *cubicState) HandleRTOExpired() { // See: https://tools.ietf.org/html/rfc8312#section-4.6 - c.T = time.Now() + c.T = c.s.ep.stack.Clock().NowMonotonic() c.numCongestionEvents = 0 c.WLastMax = c.WMax c.WMax = float64(c.s.SndCwnd) @@ -193,7 +194,7 @@ func (c *cubicState) fastConvergence() { // PostRecovery implemements congestionControl.PostRecovery. func (c *cubicState) PostRecovery() { - c.T = time.Now() + c.T = c.s.ep.stack.Clock().NowMonotonic() } // reduceSlowStartThreshold returns new SsThresh as described in diff --git a/pkg/tcpip/transport/tcp/dispatcher.go b/pkg/tcpip/transport/tcp/dispatcher.go index 512053a04..dff7cb89c 100644 --- a/pkg/tcpip/transport/tcp/dispatcher.go +++ b/pkg/tcpip/transport/tcp/dispatcher.go @@ -16,10 +16,11 @@ package tcp import ( "encoding/binary" + "math/rand" - "gvisor.dev/gvisor/pkg/rand" "gvisor.dev/gvisor/pkg/sleep" "gvisor.dev/gvisor/pkg/sync" + "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/hash/jenkins" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/pkg/tcpip/stack" @@ -141,15 +142,16 @@ func (p *processor) start(wg *sync.WaitGroup) { // in-order. type dispatcher struct { processors []processor - seed uint32 - wg sync.WaitGroup + // seed is a random secret for a jenkins hash. + seed uint32 + wg sync.WaitGroup } -func (d *dispatcher) init(nProcessors int) { +func (d *dispatcher) init(rng *rand.Rand, nProcessors int) { d.close() d.wait() d.processors = make([]processor, nProcessors) - d.seed = generateRandUint32() + d.seed = rng.Uint32() for i := range d.processors { p := &d.processors[i] p.sleeper.AddWaker(&p.newEndpointWaker, newEndpointWaker) @@ -172,12 +174,11 @@ func (d *dispatcher) wait() { d.wg.Wait() } -func (d *dispatcher) queuePacket(stackEP stack.TransportEndpoint, id stack.TransportEndpointID, pkt *stack.PacketBuffer) { +func (d *dispatcher) queuePacket(stackEP stack.TransportEndpoint, id stack.TransportEndpointID, clock tcpip.Clock, pkt *stack.PacketBuffer) { ep := stackEP.(*endpoint) - s := newIncomingSegment(id, pkt) + s := newIncomingSegment(id, clock, pkt) if !s.parse(pkt.RXTransportChecksumValidated) { - ep.stack.Stats().MalformedRcvdPackets.Increment() ep.stack.Stats().TCP.InvalidSegmentsReceived.Increment() ep.stats.ReceiveErrors.MalformedPacketsReceived.Increment() s.decRef() @@ -185,7 +186,6 @@ func (d *dispatcher) queuePacket(stackEP stack.TransportEndpoint, id stack.Trans } if !s.csumValid { - ep.stack.Stats().MalformedRcvdPackets.Increment() ep.stack.Stats().TCP.ChecksumErrors.Increment() ep.stats.ReceiveErrors.ChecksumErrors.Increment() s.decRef() @@ -213,14 +213,6 @@ func (d *dispatcher) queuePacket(stackEP stack.TransportEndpoint, id stack.Trans d.selectProcessor(id).queueEndpoint(ep) } -func generateRandUint32() uint32 { - b := make([]byte, 4) - if _, err := rand.Read(b); err != nil { - panic(err) - } - return binary.LittleEndian.Uint32(b) -} - func (d *dispatcher) selectProcessor(id stack.TransportEndpointID) *processor { var payload [4]byte binary.LittleEndian.PutUint16(payload[0:], id.LocalPort) diff --git a/pkg/tcpip/transport/tcp/dual_stack_test.go b/pkg/tcpip/transport/tcp/dual_stack_test.go index f148d505d..5342aacfd 100644 --- a/pkg/tcpip/transport/tcp/dual_stack_test.go +++ b/pkg/tcpip/transport/tcp/dual_stack_test.go @@ -421,7 +421,7 @@ func testV4Accept(t *testing.T, c *context.Context) { r.Reset(data) nep.Write(&r, tcpip.WriteOptions{}) b = c.GetPacket() - tcp = header.TCP(header.IPv4(b).Payload()) + tcp = header.IPv4(b).Payload() if string(tcp.Payload()) != data { t.Fatalf("Unexpected data: got %v, want %v", string(tcp.Payload()), data) } diff --git a/pkg/tcpip/transport/tcp/endpoint.go b/pkg/tcpip/transport/tcp/endpoint.go index 50d39cbad..a27e2110b 100644 --- a/pkg/tcpip/transport/tcp/endpoint.go +++ b/pkg/tcpip/transport/tcp/endpoint.go @@ -20,12 +20,12 @@ import ( "fmt" "io" "math" + "math/rand" "runtime" "strings" "sync/atomic" "time" - "gvisor.dev/gvisor/pkg/rand" "gvisor.dev/gvisor/pkg/sleep" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" @@ -38,19 +38,15 @@ import ( ) // EndpointState represents the state of a TCP endpoint. -type EndpointState uint32 +type EndpointState tcpip.EndpointState // Endpoint states. Note that are represented in a netstack-specific manner and // may not be meaningful externally. Specifically, they need to be translated to // Linux's representation for these states if presented to userspace. const ( - // Endpoint states internal to netstack. These map to the TCP state CLOSED. - StateInitial EndpointState = iota - StateBound - StateConnecting // Connect() called, but the initial SYN hasn't been sent. - StateError - - // TCP protocol states. + _ EndpointState = iota + // TCP protocol states in sync with the definitions in + // https://github.com/torvalds/linux/blob/7acac4b3196/include/net/tcp_states.h#L13 StateEstablished StateSynSent StateSynRecv @@ -62,6 +58,12 @@ const ( StateLastAck StateListen StateClosing + + // Endpoint states internal to netstack. + StateInitial + StateBound + StateConnecting // Connect() called, but the initial SYN hasn't been sent. + StateError ) const ( @@ -97,6 +99,16 @@ func (s EndpointState) connecting() bool { } } +// internal returns true when the state is netstack internal. +func (s EndpointState) internal() bool { + switch s { + case StateInitial, StateBound, StateConnecting, StateError: + return true + default: + return false + } +} + // handshake returns true when s is one of the states representing an endpoint // in the middle of a TCP handshake. func (s EndpointState) handshake() bool { @@ -422,12 +434,12 @@ type endpoint struct { // state must be read/set using the EndpointState()/setEndpointState() // methods. - state EndpointState `state:".(EndpointState)"` + state uint32 `state:".(EndpointState)"` // origEndpointState is only used during a restore phase to save the // endpoint state at restore time as the socket is moved to it's correct // state. - origEndpointState EndpointState `state:"nosave"` + origEndpointState uint32 `state:"nosave"` isPortReserved bool `state:"manual"` isRegistered bool `state:"manual"` @@ -468,7 +480,7 @@ type endpoint struct { // recentTSTime is the unix time when we last updated // TCPEndpointStateInner.RecentTS. - recentTSTime time.Time `state:".(unixTime)"` + recentTSTime tcpip.MonotonicTime // shutdownFlags represent the current shutdown state of the endpoint. shutdownFlags tcpip.ShutdownFlags @@ -626,7 +638,7 @@ type endpoint struct { // lastOutOfWindowAckTime is the time at which the an ACK was sent in response // to an out of window segment being received by this endpoint. - lastOutOfWindowAckTime time.Time `state:".(unixTime)"` + lastOutOfWindowAckTime tcpip.MonotonicTime } // UniqueID implements stack.TransportEndpoint.UniqueID. @@ -747,7 +759,7 @@ func (e *endpoint) ResumeWork() { // // Precondition: e.mu must be held to call this method. func (e *endpoint) setEndpointState(state EndpointState) { - oldstate := EndpointState(atomic.LoadUint32((*uint32)(&e.state))) + oldstate := EndpointState(atomic.LoadUint32(&e.state)) switch state { case StateEstablished: e.stack.Stats().TCP.CurrentEstablished.Increment() @@ -764,18 +776,18 @@ func (e *endpoint) setEndpointState(state EndpointState) { e.stack.Stats().TCP.CurrentEstablished.Decrement() } } - atomic.StoreUint32((*uint32)(&e.state), uint32(state)) + atomic.StoreUint32(&e.state, uint32(state)) } // EndpointState returns the current state of the endpoint. func (e *endpoint) EndpointState() EndpointState { - return EndpointState(atomic.LoadUint32((*uint32)(&e.state))) + return EndpointState(atomic.LoadUint32(&e.state)) } // setRecentTimestamp sets the recentTS field to the provided value. func (e *endpoint) setRecentTimestamp(recentTS uint32) { e.RecentTS = recentTS - e.recentTSTime = time.Now() + e.recentTSTime = e.stack.Clock().NowMonotonic() } // recentTimestamp returns the value of the recentTS field. @@ -806,11 +818,11 @@ func newEndpoint(s *stack.Stack, netProto tcpip.NetworkProtocolNumber, waiterQue }, sndQueueInfo: sndQueueInfo{ TCPSndBufState: stack.TCPSndBufState{ - SndMTU: int(math.MaxInt32), + SndMTU: math.MaxInt32, }, }, waiterQueue: waiterQueue, - state: StateInitial, + state: uint32(StateInitial), keepalive: keepalive{ // Linux defaults. idle: 2 * time.Hour, @@ -870,9 +882,9 @@ func newEndpoint(s *stack.Stack, netProto tcpip.NetworkProtocolNumber, waiterQue } e.segmentQueue.ep = e - e.TSOffset = timeStampOffset() + e.TSOffset = timeStampOffset(e.stack.Rand()) e.acceptCond = sync.NewCond(&e.acceptMu) - e.keepalive.timer.init(&e.keepalive.waker) + e.keepalive.timer.init(e.stack.Clock(), &e.keepalive.waker) return e } @@ -1189,7 +1201,7 @@ func (e *endpoint) ModerateRecvBuf(copied int) { e.rcvQueueInfo.rcvQueueMu.Unlock() return } - now := time.Now() + now := e.stack.Clock().NowMonotonic() if rtt := e.rcvQueueInfo.RcvAutoParams.RTT; rtt == 0 || now.Sub(e.rcvQueueInfo.RcvAutoParams.MeasureTime) < rtt { e.rcvQueueInfo.RcvAutoParams.CopiedBytes += copied e.rcvQueueInfo.rcvQueueMu.Unlock() @@ -1544,7 +1556,7 @@ func (e *endpoint) Write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, tcp } // Add data to the send queue. - s := newOutgoingSegment(e.TransportEndpointInfo.ID, v) + s := newOutgoingSegment(e.TransportEndpointInfo.ID, e.stack.Clock(), v) e.sndQueueInfo.SndBufUsed += len(v) e.sndQueueInfo.SndBufInQueue += seqnum.Size(len(v)) e.sndQueueInfo.sndQueue.PushBack(s) @@ -1956,6 +1968,11 @@ func (e *endpoint) GetSockOptInt(opt tcpip.SockOptInt) (int, tcpip.Error) { func (e *endpoint) getTCPInfo() tcpip.TCPInfoOption { info := tcpip.TCPInfoOption{} e.LockUser() + if state := e.EndpointState(); state.internal() { + info.State = tcpip.EndpointState(StateClose) + } else { + info.State = tcpip.EndpointState(state) + } snd := e.snd if snd != nil { // We do not calculate RTT before sending the data packets. If @@ -2198,7 +2215,7 @@ func (e *endpoint) connect(addr tcpip.FullAddress, handshake bool, run bool) tcp BindToDevice: bindToDevice, Dest: addr, } - if _, err := e.stack.ReservePort(portRes, nil /* testPort */); err != nil { + if _, err := e.stack.ReservePort(e.stack.Rand(), portRes, nil /* testPort */); err != nil { if _, ok := err.(*tcpip.ErrPortInUse); !ok || !reuse { return false, nil } @@ -2224,7 +2241,7 @@ func (e *endpoint) connect(addr tcpip.FullAddress, handshake bool, run bool) tcp // If the endpoint is not in TIME-WAIT or if it is in TIME-WAIT but // less than 1 second has elapsed since its recentTS was updated then // we cannot reuse the port. - if tcpEP.EndpointState() != StateTimeWait || time.Since(tcpEP.recentTSTime) < 1*time.Second { + if tcpEP.EndpointState() != StateTimeWait || e.stack.Clock().NowMonotonic().Sub(tcpEP.recentTSTime) < 1*time.Second { tcpEP.UnlockUser() return false, nil } @@ -2245,7 +2262,7 @@ func (e *endpoint) connect(addr tcpip.FullAddress, handshake bool, run bool) tcp BindToDevice: bindToDevice, Dest: addr, } - if _, err := e.stack.ReservePort(portRes, nil /* testPort */); err != nil { + if _, err := e.stack.ReservePort(e.stack.Rand(), portRes, nil /* testPort */); err != nil { return false, nil } } @@ -2370,7 +2387,7 @@ func (e *endpoint) shutdownLocked(flags tcpip.ShutdownFlags) tcpip.Error { } // Queue fin segment. - s := newOutgoingSegment(e.TransportEndpointInfo.ID, nil) + s := newOutgoingSegment(e.TransportEndpointInfo.ID, e.stack.Clock(), nil) e.sndQueueInfo.sndQueue.PushBack(s) e.sndQueueInfo.SndBufInQueue++ // Mark endpoint as closed. @@ -2581,7 +2598,7 @@ func (e *endpoint) bindLocked(addr tcpip.FullAddress) (err tcpip.Error) { BindToDevice: bindToDevice, Dest: tcpip.FullAddress{}, } - port, err := e.stack.ReservePort(portRes, func(p uint16) (bool, tcpip.Error) { + port, err := e.stack.ReservePort(e.stack.Rand(), portRes, func(p uint16) (bool, tcpip.Error) { id := e.TransportEndpointInfo.ID id.LocalPort = p // CheckRegisterTransportEndpoint should only return an error if there is a @@ -2731,7 +2748,7 @@ func (e *endpoint) updateSndBufferUsage(v int) { // We only notify when there is half the sendBufferSize available after // a full buffer event occurs. This ensures that we don't wake up // writers to queue just 1-2 segments and go back to sleep. - notify = notify && e.sndQueueInfo.SndBufUsed < int(sendBufferSize)>>1 + notify = notify && e.sndQueueInfo.SndBufUsed < sendBufferSize>>1 e.sndQueueInfo.sndQueueMu.Unlock() if notify { @@ -2848,23 +2865,20 @@ func (e *endpoint) maybeEnableTimestamp(synOpts *header.TCPSynOptions) { // timestamp returns the timestamp value to be used in the TSVal field of the // timestamp option for outgoing TCP segments for a given endpoint. func (e *endpoint) timestamp() uint32 { - return tcpTimeStamp(time.Now(), e.TSOffset) + return tcpTimeStamp(e.stack.Clock().NowMonotonic(), e.TSOffset) } // tcpTimeStamp returns a timestamp offset by the provided offset. This is // not inlined above as it's used when SYN cookies are in use and endpoint // is not created at the time when the SYN cookie is sent. -func tcpTimeStamp(curTime time.Time, offset uint32) uint32 { - return uint32(curTime.Unix()*1000+int64(curTime.Nanosecond()/1e6)) + offset +func tcpTimeStamp(curTime tcpip.MonotonicTime, offset uint32) uint32 { + d := curTime.Sub(tcpip.MonotonicTime{}) + return uint32(d.Milliseconds()) + offset } // timeStampOffset returns a randomized timestamp offset to be used when sending // timestamp values in a timestamp option for a TCP segment. -func timeStampOffset() uint32 { - b := make([]byte, 4) - if _, err := rand.Read(b); err != nil { - panic(err) - } +func timeStampOffset(rng *rand.Rand) uint32 { // Initialize a random tsOffset that will be added to the recentTS // everytime the timestamp is sent when the Timestamp option is enabled. // @@ -2874,7 +2888,7 @@ func timeStampOffset() uint32 { // NOTE: This is not completely to spec as normally this should be // initialized in a manner analogous to how sequence numbers are // randomized per connection basis. But for now this is sufficient. - return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 + return rng.Uint32() } // maybeEnableSACKPermitted marks the SACKPermitted option enabled for this endpoint @@ -2909,7 +2923,7 @@ func (e *endpoint) completeStateLocked() stack.TCPEndpointState { s := stack.TCPEndpointState{ TCPEndpointStateInner: e.TCPEndpointStateInner, ID: stack.TCPEndpointID(e.TransportEndpointInfo.ID), - SegTime: time.Now(), + SegTime: e.stack.Clock().NowMonotonic(), Receiver: e.rcv.TCPReceiverState, Sender: e.snd.TCPSenderState, } @@ -2937,7 +2951,7 @@ func (e *endpoint) completeStateLocked() stack.TCPEndpointState { if cubic, ok := e.snd.cc.(*cubicState); ok { s.Sender.Cubic = cubic.TCPCubicState - s.Sender.Cubic.TimeSinceLastCongestion = time.Since(s.Sender.Cubic.T) + s.Sender.Cubic.TimeSinceLastCongestion = e.stack.Clock().NowMonotonic().Sub(s.Sender.Cubic.T) } s.Sender.RACKState = e.snd.rc.TCPRACKState @@ -3029,14 +3043,16 @@ func GetTCPSendBufferLimits(s tcpip.StackHandler) tcpip.SendBufferSizeOption { // allowOutOfWindowAck returns true if an out-of-window ACK can be sent now. func (e *endpoint) allowOutOfWindowAck() bool { - var limit stack.TCPInvalidRateLimitOption - if err := e.stack.Option(&limit); err != nil { - panic(fmt.Sprintf("e.stack.Option(%+v) failed with error: %s", limit, err)) - } + now := e.stack.Clock().NowMonotonic() - now := time.Now() - if now.Sub(e.lastOutOfWindowAckTime) < time.Duration(limit) { - return false + if e.lastOutOfWindowAckTime != (tcpip.MonotonicTime{}) { + var limit stack.TCPInvalidRateLimitOption + if err := e.stack.Option(&limit); err != nil { + panic(fmt.Sprintf("e.stack.Option(%+v) failed with error: %s", limit, err)) + } + if now.Sub(e.lastOutOfWindowAckTime) < time.Duration(limit) { + return false + } } e.lastOutOfWindowAckTime = now diff --git a/pkg/tcpip/transport/tcp/endpoint_state.go b/pkg/tcpip/transport/tcp/endpoint_state.go index 6e9777fe4..952ccacdd 100644 --- a/pkg/tcpip/transport/tcp/endpoint_state.go +++ b/pkg/tcpip/transport/tcp/endpoint_state.go @@ -154,20 +154,25 @@ func (e *endpoint) afterLoad() { e.origEndpointState = e.state // Restore the endpoint to InitialState as it will be moved to // its origEndpointState during Resume. - e.state = StateInitial + e.state = uint32(StateInitial) // Condition variables and mutexs are not S/R'ed so reinitialize // acceptCond with e.acceptMu. e.acceptCond = sync.NewCond(&e.acceptMu) - e.keepalive.timer.init(&e.keepalive.waker) stack.StackFromEnv.RegisterRestoredEndpoint(e) } // Resume implements tcpip.ResumableEndpoint.Resume. func (e *endpoint) Resume(s *stack.Stack) { + e.keepalive.timer.init(s.Clock(), &e.keepalive.waker) + if snd := e.snd; snd != nil { + snd.resendTimer.init(s.Clock(), &snd.resendWaker) + snd.reorderTimer.init(s.Clock(), &snd.reorderWaker) + snd.probeTimer.init(s.Clock(), &snd.probeWaker) + } e.stack = s e.ops.InitHandler(e, e.stack, GetTCPSendBufferLimits, GetTCPReceiveBufferLimits) e.segmentQueue.thaw() - epState := e.origEndpointState + epState := EndpointState(e.origEndpointState) switch epState { case StateInitial, StateBound, StateListen, StateConnecting, StateEstablished: var ss tcpip.TCPSendBufferSizeRangeOption @@ -281,32 +286,12 @@ func (e *endpoint) Resume(s *stack.Stack) { }() case epState == StateClose: e.isPortReserved = false - e.state = StateClose + e.state = uint32(StateClose) e.stack.CompleteTransportEndpointCleanup(e) tcpip.DeleteDanglingEndpoint(e) case epState == StateError: - e.state = StateError + e.state = uint32(StateError) e.stack.CompleteTransportEndpointCleanup(e) tcpip.DeleteDanglingEndpoint(e) } } - -// saveRecentTSTime is invoked by stateify. -func (e *endpoint) saveRecentTSTime() unixTime { - return unixTime{e.recentTSTime.Unix(), e.recentTSTime.UnixNano()} -} - -// loadRecentTSTime is invoked by stateify. -func (e *endpoint) loadRecentTSTime(unix unixTime) { - e.recentTSTime = time.Unix(unix.second, unix.nano) -} - -// saveLastOutOfWindowAckTime is invoked by stateify. -func (e *endpoint) saveLastOutOfWindowAckTime() unixTime { - return unixTime{e.lastOutOfWindowAckTime.Unix(), e.lastOutOfWindowAckTime.UnixNano()} -} - -// loadLastOutOfWindowAckTime is invoked by stateify. -func (e *endpoint) loadLastOutOfWindowAckTime(unix unixTime) { - e.lastOutOfWindowAckTime = time.Unix(unix.second, unix.nano) -} diff --git a/pkg/tcpip/transport/tcp/forwarder.go b/pkg/tcpip/transport/tcp/forwarder.go index 2f9fe7ee0..65c86823a 100644 --- a/pkg/tcpip/transport/tcp/forwarder.go +++ b/pkg/tcpip/transport/tcp/forwarder.go @@ -65,7 +65,7 @@ func NewForwarder(s *stack.Stack, rcvWnd, maxInFlight int, handler func(*Forward // This function is expected to be passed as an argument to the // stack.SetTransportProtocolHandler function. func (f *Forwarder) HandlePacket(id stack.TransportEndpointID, pkt *stack.PacketBuffer) bool { - s := newIncomingSegment(id, pkt) + s := newIncomingSegment(id, f.stack.Clock(), pkt) defer s.decRef() // We only care about well-formed SYN packets. diff --git a/pkg/tcpip/transport/tcp/protocol.go b/pkg/tcpip/transport/tcp/protocol.go index a3d1aa1a3..2fc282e73 100644 --- a/pkg/tcpip/transport/tcp/protocol.go +++ b/pkg/tcpip/transport/tcp/protocol.go @@ -131,7 +131,7 @@ func (*protocol) ParsePorts(v buffer.View) (src, dst uint16, err tcpip.Error) { // goroutine which is responsible for dequeuing and doing full TCP dispatch of // the packet. func (p *protocol) QueuePacket(ep stack.TransportEndpoint, id stack.TransportEndpointID, pkt *stack.PacketBuffer) { - p.dispatcher.queuePacket(ep, id, pkt) + p.dispatcher.queuePacket(ep, id, p.stack.Clock(), pkt) } // HandleUnknownDestinationPacket handles packets targeted at this protocol but @@ -142,14 +142,14 @@ func (p *protocol) QueuePacket(ep stack.TransportEndpoint, id stack.TransportEnd // particular, SYNs addressed to a non-existent connection are rejected by this // means." func (p *protocol) HandleUnknownDestinationPacket(id stack.TransportEndpointID, pkt *stack.PacketBuffer) stack.UnknownDestinationPacketDisposition { - s := newIncomingSegment(id, pkt) + s := newIncomingSegment(id, p.stack.Clock(), pkt) defer s.decRef() if !s.parse(pkt.RXTransportChecksumValidated) || !s.csumValid { return stack.UnknownDestinationPacketMalformed } - if !s.flagIsSet(header.TCPFlagRst) { + if !s.flags.Contains(header.TCPFlagRst) { replyWithReset(p.stack, s, stack.DefaultTOS, 0) } @@ -181,7 +181,7 @@ func replyWithReset(st *stack.Stack, s *segment, tos, ttl uint8) tcpip.Error { // reset has sequence number zero and the ACK field is set to the sum // of the sequence number and segment length of the incoming segment. // The connection remains in the CLOSED state. - if s.flagIsSet(header.TCPFlagAck) { + if s.flags.Contains(header.TCPFlagAck) { seq = s.ackNumber } else { flags |= header.TCPFlagAck @@ -401,7 +401,7 @@ func (p *protocol) Option(option tcpip.GettableTransportProtocolOption) tcpip.Er case *tcpip.TCPTimeWaitReuseOption: p.mu.RLock() - *v = tcpip.TCPTimeWaitReuseOption(p.timeWaitReuse) + *v = p.timeWaitReuse p.mu.RUnlock() return nil @@ -481,6 +481,6 @@ func NewProtocol(s *stack.Stack) stack.TransportProtocol { // TODO(gvisor.dev/issue/5243): Set recovery to tcpip.TCPRACKLossDetection. recovery: 0, } - p.dispatcher.init(runtime.GOMAXPROCS(0)) + p.dispatcher.init(s.Rand(), runtime.GOMAXPROCS(0)) return &p } diff --git a/pkg/tcpip/transport/tcp/rack.go b/pkg/tcpip/transport/tcp/rack.go index 9e332dcf7..0da4eafaa 100644 --- a/pkg/tcpip/transport/tcp/rack.go +++ b/pkg/tcpip/transport/tcp/rack.go @@ -79,7 +79,7 @@ func (rc *rackControl) init(snd *sender, iss seqnum.Value) { // update will update the RACK related fields when an ACK has been received. // See: https://tools.ietf.org/html/draft-ietf-tcpm-rack-09#section-6.2 func (rc *rackControl) update(seg *segment, ackSeg *segment) { - rtt := time.Now().Sub(seg.xmitTime) + rtt := rc.snd.ep.stack.Clock().NowMonotonic().Sub(seg.xmitTime) tsOffset := rc.snd.ep.TSOffset // If the ACK is for a retransmitted packet, do not update if it is a @@ -115,7 +115,7 @@ func (rc *rackControl) update(seg *segment, ackSeg *segment) { // ending sequence number of the packet which has been acknowledged // most recently. endSeq := seg.sequenceNumber.Add(seqnum.Size(seg.data.Size())) - if rc.XmitTime.Before(seg.xmitTime) || (seg.xmitTime.Equal(rc.XmitTime) && rc.EndSequence.LessThan(endSeq)) { + if rc.XmitTime.Before(seg.xmitTime) || (seg.xmitTime == rc.XmitTime && rc.EndSequence.LessThan(endSeq)) { rc.XmitTime = seg.xmitTime rc.EndSequence = endSeq } @@ -174,7 +174,7 @@ func (s *sender) schedulePTO() { } s.rtt.Unlock() - now := time.Now() + now := s.ep.stack.Clock().NowMonotonic() if s.resendTimer.enabled() { if now.Add(pto).After(s.resendTimer.target) { pto = s.resendTimer.target.Sub(now) @@ -279,7 +279,7 @@ func (s *sender) detectTLPRecovery(ack seqnum.Value, rcvdSeg *segment) { // been observed RACK uses reo_wnd of zero during loss recovery, in order to // retransmit quickly, or when the number of DUPACKs exceeds the classic // DUPACKthreshold. -func (rc *rackControl) updateRACKReorderWindow(ackSeg *segment) { +func (rc *rackControl) updateRACKReorderWindow() { dsackSeen := rc.DSACKSeen snd := rc.snd @@ -352,7 +352,7 @@ func (rc *rackControl) exitRecovery() { // detectLoss marks the segment as lost if the reordering window has elapsed // and the ACK is not received. It will also arm the reorder timer. // See: https://tools.ietf.org/html/draft-ietf-tcpm-rack-08#section-7.2 Step 5. -func (rc *rackControl) detectLoss(rcvTime time.Time) int { +func (rc *rackControl) detectLoss(rcvTime tcpip.MonotonicTime) int { var timeout time.Duration numLost := 0 for seg := rc.snd.writeList.Front(); seg != nil && seg.xmitCount != 0; seg = seg.Next() { @@ -366,7 +366,7 @@ func (rc *rackControl) detectLoss(rcvTime time.Time) int { } endSeq := seg.sequenceNumber.Add(seqnum.Size(seg.data.Size())) - if seg.xmitTime.Before(rc.XmitTime) || (seg.xmitTime.Equal(rc.XmitTime) && rc.EndSequence.LessThan(endSeq)) { + if seg.xmitTime.Before(rc.XmitTime) || (seg.xmitTime == rc.XmitTime && rc.EndSequence.LessThan(endSeq)) { timeRemaining := seg.xmitTime.Sub(rcvTime) + rc.RTT + rc.ReoWnd if timeRemaining <= 0 { seg.lost = true @@ -392,7 +392,7 @@ func (rc *rackControl) reorderTimerExpired() tcpip.Error { return nil } - numLost := rc.detectLoss(time.Now()) + numLost := rc.detectLoss(rc.snd.ep.stack.Clock().NowMonotonic()) if numLost == 0 { return nil } diff --git a/pkg/tcpip/transport/tcp/rcv.go b/pkg/tcpip/transport/tcp/rcv.go index 133371455..661ca604a 100644 --- a/pkg/tcpip/transport/tcp/rcv.go +++ b/pkg/tcpip/transport/tcp/rcv.go @@ -17,7 +17,6 @@ package tcp import ( "container/heap" "math" - "time" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/header" @@ -50,7 +49,7 @@ type receiver struct { pendingRcvdSegments segmentHeap // Time when the last ack was received. - lastRcvdAckTime time.Time `state:".(unixTime)"` + lastRcvdAckTime tcpip.MonotonicTime } func newReceiver(ep *endpoint, irs seqnum.Value, rcvWnd seqnum.Size, rcvWndScale uint8) *receiver { @@ -63,7 +62,7 @@ func newReceiver(ep *endpoint, irs seqnum.Value, rcvWnd seqnum.Size, rcvWndScale }, rcvWnd: rcvWnd, rcvWUP: irs + 1, - lastRcvdAckTime: time.Now(), + lastRcvdAckTime: ep.stack.Clock().NowMonotonic(), } } @@ -137,9 +136,9 @@ func (r *receiver) getSendParams() (RcvNxt seqnum.Value, rcvWnd seqnum.Size) { // rcvWUP RcvNxt RcvAcc new RcvAcc // <=====curWnd ===> // <========= newWnd > curWnd ========= > - if r.RcvNxt.Add(seqnum.Size(curWnd)).LessThan(r.RcvNxt.Add(seqnum.Size(newWnd))) && toGrow { + if r.RcvNxt.Add(curWnd).LessThan(r.RcvNxt.Add(newWnd)) && toGrow { // If the new window moves the right edge, then update RcvAcc. - r.RcvAcc = r.RcvNxt.Add(seqnum.Size(newWnd)) + r.RcvAcc = r.RcvNxt.Add(newWnd) } else { if newWnd == 0 { // newWnd is zero but we can't advertise a zero as it would cause window @@ -245,7 +244,7 @@ func (r *receiver) consumeSegment(s *segment, segSeq seqnum.Value, segLen seqnum TrimSACKBlockList(&r.ep.sack, r.RcvNxt) // Handle FIN or FIN-ACK. - if s.flagIsSet(header.TCPFlagFin) { + if s.flags.Contains(header.TCPFlagFin) { r.RcvNxt++ // Send ACK immediately. @@ -261,7 +260,7 @@ func (r *receiver) consumeSegment(s *segment, segSeq seqnum.Value, segLen seqnum case StateEstablished: r.ep.setEndpointState(StateCloseWait) case StateFinWait1: - if s.flagIsSet(header.TCPFlagAck) && s.ackNumber == r.ep.snd.SndNxt { + if s.flags.Contains(header.TCPFlagAck) && s.ackNumber == r.ep.snd.SndNxt { // FIN-ACK, transition to TIME-WAIT. r.ep.setEndpointState(StateTimeWait) } else { @@ -296,7 +295,7 @@ func (r *receiver) consumeSegment(s *segment, segSeq seqnum.Value, segLen seqnum // Handle ACK (not FIN-ACK, which we handled above) during one of the // shutdown states. - if s.flagIsSet(header.TCPFlagAck) && s.ackNumber == r.ep.snd.SndNxt { + if s.flags.Contains(header.TCPFlagAck) && s.ackNumber == r.ep.snd.SndNxt { switch r.ep.EndpointState() { case StateFinWait1: r.ep.setEndpointState(StateFinWait2) @@ -325,9 +324,9 @@ func (r *receiver) updateRTT() { // is first acknowledged and the receipt of data that is at least one // window beyond the sequence number that was acknowledged. r.ep.rcvQueueInfo.rcvQueueMu.Lock() - if r.ep.rcvQueueInfo.RcvAutoParams.RTTMeasureTime.IsZero() { + if r.ep.rcvQueueInfo.RcvAutoParams.RTTMeasureTime == (tcpip.MonotonicTime{}) { // New measurement. - r.ep.rcvQueueInfo.RcvAutoParams.RTTMeasureTime = time.Now() + r.ep.rcvQueueInfo.RcvAutoParams.RTTMeasureTime = r.ep.stack.Clock().NowMonotonic() r.ep.rcvQueueInfo.RcvAutoParams.RTTMeasureSeqNumber = r.RcvNxt.Add(r.rcvWnd) r.ep.rcvQueueInfo.rcvQueueMu.Unlock() return @@ -336,14 +335,14 @@ func (r *receiver) updateRTT() { r.ep.rcvQueueInfo.rcvQueueMu.Unlock() return } - rtt := time.Since(r.ep.rcvQueueInfo.RcvAutoParams.RTTMeasureTime) + rtt := r.ep.stack.Clock().NowMonotonic().Sub(r.ep.rcvQueueInfo.RcvAutoParams.RTTMeasureTime) // We only store the minimum observed RTT here as this is only used in // absence of a SRTT available from either timestamps or a sender // measurement of RTT. if r.ep.rcvQueueInfo.RcvAutoParams.RTT == 0 || rtt < r.ep.rcvQueueInfo.RcvAutoParams.RTT { r.ep.rcvQueueInfo.RcvAutoParams.RTT = rtt } - r.ep.rcvQueueInfo.RcvAutoParams.RTTMeasureTime = time.Now() + r.ep.rcvQueueInfo.RcvAutoParams.RTTMeasureTime = r.ep.stack.Clock().NowMonotonic() r.ep.rcvQueueInfo.RcvAutoParams.RTTMeasureSeqNumber = r.RcvNxt.Add(r.rcvWnd) r.ep.rcvQueueInfo.rcvQueueMu.Unlock() } @@ -424,7 +423,7 @@ func (r *receiver) handleRcvdSegmentClosing(s *segment, state EndpointState, clo // while the FIN is considered to occur after // the last actual data octet in a segment in // which it occurs. - if closed && (!s.flagIsSet(header.TCPFlagFin) || s.sequenceNumber.Add(s.logicalLen()) != r.RcvNxt+1) { + if closed && (!s.flags.Contains(header.TCPFlagFin) || s.sequenceNumber.Add(s.logicalLen()) != r.RcvNxt+1) { return true, &tcpip.ErrConnectionAborted{} } } @@ -467,11 +466,11 @@ func (r *receiver) handleRcvdSegment(s *segment) (drop bool, err tcpip.Error) { } // Store the time of the last ack. - r.lastRcvdAckTime = time.Now() + r.lastRcvdAckTime = r.ep.stack.Clock().NowMonotonic() // Defer segment processing if it can't be consumed now. if !r.consumeSegment(s, segSeq, segLen) { - if segLen > 0 || s.flagIsSet(header.TCPFlagFin) { + if segLen > 0 || s.flags.Contains(header.TCPFlagFin) { // We only store the segment if it's within our buffer size limit. // // Only use 75% of the receive buffer queue for out-of-order @@ -539,7 +538,7 @@ func (r *receiver) handleTimeWaitSegment(s *segment) (resetTimeWait bool, newSyn // // As we do not yet support PAWS, we are being conservative in ignoring // RSTs by default. - if s.flagIsSet(header.TCPFlagRst) { + if s.flags.Contains(header.TCPFlagRst) { return false, false } @@ -559,13 +558,13 @@ func (r *receiver) handleTimeWaitSegment(s *segment) (resetTimeWait bool, newSyn // (2) returns to TIME-WAIT state if the SYN turns out // to be an old duplicate". - if s.flagIsSet(header.TCPFlagSyn) && r.RcvNxt.LessThan(segSeq) { + if s.flags.Contains(header.TCPFlagSyn) && r.RcvNxt.LessThan(segSeq) { return false, true } // Drop the segment if it does not contain an ACK. - if !s.flagIsSet(header.TCPFlagAck) { + if !s.flags.Contains(header.TCPFlagAck) { return false, false } @@ -574,7 +573,7 @@ func (r *receiver) handleTimeWaitSegment(s *segment) (resetTimeWait bool, newSyn r.ep.updateRecentTimestamp(s.parsedOptions.TSVal, r.ep.snd.MaxSentAck, segSeq) } - if segSeq.Add(1) == r.RcvNxt && s.flagIsSet(header.TCPFlagFin) { + if segSeq.Add(1) == r.RcvNxt && s.flags.Contains(header.TCPFlagFin) { // If it's a FIN-ACK then resetTimeWait and send an ACK, as it // indicates our final ACK could have been lost. r.ep.snd.sendAck() diff --git a/pkg/tcpip/transport/tcp/segment.go b/pkg/tcpip/transport/tcp/segment.go index 7e5ba6ef7..ca78c96f2 100644 --- a/pkg/tcpip/transport/tcp/segment.go +++ b/pkg/tcpip/transport/tcp/segment.go @@ -17,7 +17,6 @@ package tcp import ( "fmt" "sync/atomic" - "time" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" @@ -73,9 +72,9 @@ type segment struct { parsedOptions header.TCPOptions options []byte `state:".([]byte)"` hasNewSACKInfo bool - rcvdTime time.Time `state:".(unixTime)"` + rcvdTime tcpip.MonotonicTime // xmitTime is the last transmit time of this segment. - xmitTime time.Time `state:".(unixTime)"` + xmitTime tcpip.MonotonicTime xmitCount uint32 // acked indicates if the segment has already been SACKed. @@ -88,7 +87,7 @@ type segment struct { lost bool } -func newIncomingSegment(id stack.TransportEndpointID, pkt *stack.PacketBuffer) *segment { +func newIncomingSegment(id stack.TransportEndpointID, clock tcpip.Clock, pkt *stack.PacketBuffer) *segment { netHdr := pkt.Network() s := &segment{ refCnt: 1, @@ -100,17 +99,17 @@ func newIncomingSegment(id stack.TransportEndpointID, pkt *stack.PacketBuffer) * } s.data = pkt.Data().ExtractVV().Clone(s.views[:]) s.hdr = header.TCP(pkt.TransportHeader().View()) - s.rcvdTime = time.Now() + s.rcvdTime = clock.NowMonotonic() s.dataMemSize = s.data.Size() return s } -func newOutgoingSegment(id stack.TransportEndpointID, v buffer.View) *segment { +func newOutgoingSegment(id stack.TransportEndpointID, clock tcpip.Clock, v buffer.View) *segment { s := &segment{ refCnt: 1, id: id, } - s.rcvdTime = time.Now() + s.rcvdTime = clock.NowMonotonic() if len(v) != 0 { s.views[0] = v s.data = buffer.NewVectorisedView(len(v), s.views[:1]) @@ -149,16 +148,6 @@ func (s *segment) merge(oth *segment) { oth.dataMemSize = oth.data.Size() } -// flagIsSet checks if at least one flag in flags is set in s.flags. -func (s *segment) flagIsSet(flags header.TCPFlags) bool { - return s.flags&flags != 0 -} - -// flagsAreSet checks if all flags in flags are set in s.flags. -func (s *segment) flagsAreSet(flags header.TCPFlags) bool { - return s.flags&flags == flags -} - // setOwner sets the owning endpoint for this segment. Its required // to be called to ensure memory accounting for receive/send buffer // queues is done properly. @@ -198,10 +187,10 @@ func (s *segment) incRef() { // as the data length plus one for each of the SYN and FIN bits set. func (s *segment) logicalLen() seqnum.Size { l := seqnum.Size(s.data.Size()) - if s.flagIsSet(header.TCPFlagSyn) { + if s.flags.Contains(header.TCPFlagSyn) { l++ } - if s.flagIsSet(header.TCPFlagFin) { + if s.flags.Contains(header.TCPFlagFin) { l++ } return l @@ -243,7 +232,7 @@ func (s *segment) parse(skipChecksumValidation bool) bool { return false } - s.options = []byte(s.hdr[header.TCPMinimumSize:]) + s.options = s.hdr[header.TCPMinimumSize:] s.parsedOptions = header.ParseTCPOptions(s.options) if skipChecksumValidation { s.csumValid = true @@ -262,5 +251,5 @@ func (s *segment) parse(skipChecksumValidation bool) bool { // sackBlock returns a header.SACKBlock that represents this segment. func (s *segment) sackBlock() header.SACKBlock { - return header.SACKBlock{s.sequenceNumber, s.sequenceNumber.Add(s.logicalLen())} + return header.SACKBlock{Start: s.sequenceNumber, End: s.sequenceNumber.Add(s.logicalLen())} } diff --git a/pkg/tcpip/transport/tcp/segment_state.go b/pkg/tcpip/transport/tcp/segment_state.go index 7422d8c02..dcfa80f95 100644 --- a/pkg/tcpip/transport/tcp/segment_state.go +++ b/pkg/tcpip/transport/tcp/segment_state.go @@ -15,8 +15,6 @@ package tcp import ( - "time" - "gvisor.dev/gvisor/pkg/tcpip/buffer" ) @@ -55,23 +53,3 @@ func (s *segment) loadOptions(options []byte) { // allocated so there is no cost here. s.options = options } - -// saveRcvdTime is invoked by stateify. -func (s *segment) saveRcvdTime() unixTime { - return unixTime{s.rcvdTime.Unix(), s.rcvdTime.UnixNano()} -} - -// loadRcvdTime is invoked by stateify. -func (s *segment) loadRcvdTime(unix unixTime) { - s.rcvdTime = time.Unix(unix.second, unix.nano) -} - -// saveXmitTime is invoked by stateify. -func (s *segment) saveXmitTime() unixTime { - return unixTime{s.rcvdTime.Unix(), s.rcvdTime.UnixNano()} -} - -// loadXmitTime is invoked by stateify. -func (s *segment) loadXmitTime(unix unixTime) { - s.rcvdTime = time.Unix(unix.second, unix.nano) -} diff --git a/pkg/tcpip/transport/tcp/segment_test.go b/pkg/tcpip/transport/tcp/segment_test.go index 486016fc0..2e6ea06f5 100644 --- a/pkg/tcpip/transport/tcp/segment_test.go +++ b/pkg/tcpip/transport/tcp/segment_test.go @@ -19,6 +19,7 @@ import ( "github.com/google/go-cmp/cmp" "gvisor.dev/gvisor/pkg/tcpip/buffer" + "gvisor.dev/gvisor/pkg/tcpip/faketime" "gvisor.dev/gvisor/pkg/tcpip/stack" ) @@ -39,10 +40,11 @@ func checkSegmentSize(t *testing.T, name string, seg *segment, want segmentSizeW } func TestSegmentMerge(t *testing.T) { + var clock faketime.NullClock id := stack.TransportEndpointID{} - seg1 := newOutgoingSegment(id, buffer.NewView(10)) + seg1 := newOutgoingSegment(id, &clock, buffer.NewView(10)) defer seg1.decRef() - seg2 := newOutgoingSegment(id, buffer.NewView(20)) + seg2 := newOutgoingSegment(id, &clock, buffer.NewView(20)) defer seg2.decRef() checkSegmentSize(t, "seg1", seg1, segmentSizeWants{ diff --git a/pkg/tcpip/transport/tcp/snd.go b/pkg/tcpip/transport/tcp/snd.go index f43e86677..72d58dcff 100644 --- a/pkg/tcpip/transport/tcp/snd.go +++ b/pkg/tcpip/transport/tcp/snd.go @@ -94,7 +94,7 @@ type sender struct { // firstRetransmittedSegXmitTime is the original transmit time of // the first segment that was retransmitted due to RTO expiration. - firstRetransmittedSegXmitTime time.Time `state:".(unixTime)"` + firstRetransmittedSegXmitTime tcpip.MonotonicTime // zeroWindowProbing is set if the sender is currently probing // for zero receive window. @@ -169,7 +169,7 @@ func newSender(ep *endpoint, iss, irs seqnum.Value, sndWnd seqnum.Size, mss uint SndUna: iss + 1, SndNxt: iss + 1, RTTMeasureSeqNum: iss + 1, - LastSendTime: time.Now(), + LastSendTime: ep.stack.Clock().NowMonotonic(), MaxPayloadSize: maxPayloadSize, MaxSentAck: irs + 1, FastRecovery: stack.TCPFastRecoveryState{ @@ -197,9 +197,9 @@ func newSender(ep *endpoint, iss, irs seqnum.Value, sndWnd seqnum.Size, mss uint s.SndWndScale = uint8(sndWndScale) } - s.resendTimer.init(&s.resendWaker) - s.reorderTimer.init(&s.reorderWaker) - s.probeTimer.init(&s.probeWaker) + s.resendTimer.init(s.ep.stack.Clock(), &s.resendWaker) + s.reorderTimer.init(s.ep.stack.Clock(), &s.reorderWaker) + s.probeTimer.init(s.ep.stack.Clock(), &s.probeWaker) s.updateMaxPayloadSize(int(ep.route.MTU()), 0) @@ -441,7 +441,7 @@ func (s *sender) retransmitTimerExpired() bool { // timeout since the first retransmission. uto := s.ep.userTimeout - if s.firstRetransmittedSegXmitTime.IsZero() { + if s.firstRetransmittedSegXmitTime == (tcpip.MonotonicTime{}) { // We store the original xmitTime of the segment that we are // about to retransmit as the retransmission time. This is // required as by the time the retransmitTimer has expired the @@ -450,7 +450,7 @@ func (s *sender) retransmitTimerExpired() bool { s.firstRetransmittedSegXmitTime = s.writeList.Front().xmitTime } - elapsed := time.Since(s.firstRetransmittedSegXmitTime) + elapsed := s.ep.stack.Clock().NowMonotonic().Sub(s.firstRetransmittedSegXmitTime) remaining := s.maxRTO if uto != 0 { // Cap to the user specified timeout if one is specified. @@ -616,7 +616,7 @@ func (s *sender) NextSeg(nextSegHint *segment) (nextSeg, hint *segment, rescueRt // 'S2' that meets the following 3 criteria for determinig // loss, the sequence range of one segment of up to SMSS // octects starting with S2 MUST be returned. - if !s.ep.scoreboard.IsSACKED(header.SACKBlock{segSeq, segSeq.Add(1)}) { + if !s.ep.scoreboard.IsSACKED(header.SACKBlock{Start: segSeq, End: segSeq.Add(1)}) { // NextSeg(): // // (1.a) S2 is greater than HighRxt @@ -866,8 +866,8 @@ func (s *sender) enableZeroWindowProbing() { // We piggyback the probing on the retransmit timer with the // current retranmission interval, as we may start probing while // segment retransmissions. - if s.firstRetransmittedSegXmitTime.IsZero() { - s.firstRetransmittedSegXmitTime = time.Now() + if s.firstRetransmittedSegXmitTime == (tcpip.MonotonicTime{}) { + s.firstRetransmittedSegXmitTime = s.ep.stack.Clock().NowMonotonic() } s.resendTimer.enable(s.RTO) } @@ -875,7 +875,7 @@ func (s *sender) enableZeroWindowProbing() { func (s *sender) disableZeroWindowProbing() { s.zeroWindowProbing = false s.unackZeroWindowProbes = 0 - s.firstRetransmittedSegXmitTime = time.Time{} + s.firstRetransmittedSegXmitTime = tcpip.MonotonicTime{} s.resendTimer.disable() } @@ -925,7 +925,7 @@ func (s *sender) sendData() { // "A TCP SHOULD set cwnd to no more than RW before beginning // transmission if the TCP has not sent data in the interval exceeding // the retrasmission timeout." - if !s.FastRecovery.Active && s.state != tcpip.RTORecovery && time.Now().Sub(s.LastSendTime) > s.RTO { + if !s.FastRecovery.Active && s.state != tcpip.RTORecovery && s.ep.stack.Clock().NowMonotonic().Sub(s.LastSendTime) > s.RTO { if s.SndCwnd > InitialCwnd { s.SndCwnd = InitialCwnd } @@ -1024,7 +1024,7 @@ func (s *sender) SetPipe() { if segEnd.LessThan(endSeq) { endSeq = segEnd } - sb := header.SACKBlock{startSeq, endSeq} + sb := header.SACKBlock{Start: startSeq, End: endSeq} // SetPipe(): // // After initializing pipe to zero, the following steps are @@ -1132,7 +1132,7 @@ func (s *sender) isDupAck(seg *segment) bool { // (b) The incoming acknowledgment carries no data. seg.logicalLen() == 0 && // (c) The SYN and FIN bits are both off. - !seg.flagIsSet(header.TCPFlagFin) && !seg.flagIsSet(header.TCPFlagSyn) && + !seg.flags.Intersects(header.TCPFlagFin|header.TCPFlagSyn) && // (d) the ACK number is equal to the greatest acknowledgment received on // the given connection (TCP.UNA from RFC793). seg.ackNumber == s.SndUna && @@ -1234,7 +1234,7 @@ func checkDSACK(rcvdSeg *segment) bool { func (s *sender) handleRcvdSegment(rcvdSeg *segment) { // Check if we can extract an RTT measurement from this ack. if !rcvdSeg.parsedOptions.TS && s.RTTMeasureSeqNum.LessThan(rcvdSeg.ackNumber) { - s.updateRTO(time.Now().Sub(s.RTTMeasureTime)) + s.updateRTO(s.ep.stack.Clock().NowMonotonic().Sub(s.RTTMeasureTime)) s.RTTMeasureSeqNum = s.SndNxt } @@ -1444,7 +1444,7 @@ func (s *sender) handleRcvdSegment(rcvdSeg *segment) { if s.SndUna == s.SndNxt { s.Outstanding = 0 // Reset firstRetransmittedSegXmitTime to the zero value. - s.firstRetransmittedSegXmitTime = time.Time{} + s.firstRetransmittedSegXmitTime = tcpip.MonotonicTime{} s.resendTimer.disable() s.probeTimer.disable() } @@ -1455,7 +1455,7 @@ func (s *sender) handleRcvdSegment(rcvdSeg *segment) { // See: https://tools.ietf.org/html/draft-ietf-tcpm-rack-08#section-7.2 // * Upon receiving an ACK: // * Step 4: Update RACK reordering window - s.rc.updateRACKReorderWindow(rcvdSeg) + s.rc.updateRACKReorderWindow() // After the reorder window is calculated, detect any loss by checking // if the time elapsed after the segments are sent is greater than the @@ -1502,7 +1502,7 @@ func (s *sender) sendSegment(seg *segment) tcpip.Error { s.ep.stack.Stats().TCP.SlowStartRetransmits.Increment() } } - seg.xmitTime = time.Now() + seg.xmitTime = s.ep.stack.Clock().NowMonotonic() seg.xmitCount++ seg.lost = false err := s.sendSegmentFromView(seg.data, seg.flags, seg.sequenceNumber) @@ -1527,7 +1527,7 @@ func (s *sender) sendSegment(seg *segment) tcpip.Error { // sendSegmentFromView sends a new segment containing the given payload, flags // and sequence number. func (s *sender) sendSegmentFromView(data buffer.VectorisedView, flags header.TCPFlags, seq seqnum.Value) tcpip.Error { - s.LastSendTime = time.Now() + s.LastSendTime = s.ep.stack.Clock().NowMonotonic() if seq == s.RTTMeasureSeqNum { s.RTTMeasureTime = s.LastSendTime } diff --git a/pkg/tcpip/transport/tcp/snd_state.go b/pkg/tcpip/transport/tcp/snd_state.go deleted file mode 100644 index 2f805d8ce..000000000 --- a/pkg/tcpip/transport/tcp/snd_state.go +++ /dev/null @@ -1,42 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package tcp - -import ( - "time" -) - -// +stateify savable -type unixTime struct { - second int64 - nano int64 -} - -// afterLoad is invoked by stateify. -func (s *sender) afterLoad() { - s.resendTimer.init(&s.resendWaker) - s.reorderTimer.init(&s.reorderWaker) - s.probeTimer.init(&s.probeWaker) -} - -// saveFirstRetransmittedSegXmitTime is invoked by stateify. -func (s *sender) saveFirstRetransmittedSegXmitTime() unixTime { - return unixTime{s.firstRetransmittedSegXmitTime.Unix(), s.firstRetransmittedSegXmitTime.UnixNano()} -} - -// loadFirstRetransmittedSegXmitTime is invoked by stateify. -func (s *sender) loadFirstRetransmittedSegXmitTime(unix unixTime) { - s.firstRetransmittedSegXmitTime = time.Unix(unix.second, unix.nano) -} diff --git a/pkg/tcpip/transport/tcp/tcp_rack_test.go b/pkg/tcpip/transport/tcp/tcp_rack_test.go index c58361bc1..d6cf786a1 100644 --- a/pkg/tcpip/transport/tcp/tcp_rack_test.go +++ b/pkg/tcpip/transport/tcp/tcp_rack_test.go @@ -38,7 +38,7 @@ const ( func setStackRACKPermitted(t *testing.T, c *context.Context) { t.Helper() - opt := tcpip.TCPRecovery(tcpip.TCPRACKLossDetection) + opt := tcpip.TCPRACKLossDetection if err := c.Stack().SetTransportProtocolOption(header.TCPProtocolNumber, &opt); err != nil { t.Fatalf("c.s.SetTransportProtocolOption(%d, &%v(%v)): %s", header.TCPProtocolNumber, opt, opt, err) } @@ -50,7 +50,7 @@ func TestRACKUpdate(t *testing.T) { c := context.New(t, uint32(mtu)) defer c.Cleanup() - var xmitTime time.Time + var xmitTime tcpip.MonotonicTime probeDone := make(chan struct{}) c.Stack().AddTCPProbe(func(state stack.TCPEndpointState) { // Validate that the endpoint Sender.RACKState is what we expect. @@ -79,7 +79,7 @@ func TestRACKUpdate(t *testing.T) { } // Write the data. - xmitTime = time.Now() + xmitTime = c.Stack().Clock().NowMonotonic() var r bytes.Reader r.Reset(data) if _, err := c.EP.Write(&r, tcpip.WriteOptions{}); err != nil { diff --git a/pkg/tcpip/transport/tcp/tcp_test.go b/pkg/tcpip/transport/tcp/tcp_test.go index 9916182e3..9bbe9bc3e 100644 --- a/pkg/tcpip/transport/tcp/tcp_test.go +++ b/pkg/tcpip/transport/tcp/tcp_test.go @@ -4259,7 +4259,7 @@ func TestReceivedInvalidSegmentCountIncrement(t *testing.T) { SrcPort: context.TestPort, DstPort: c.Port, Flags: header.TCPFlagAck, - SeqNum: seqnum.Value(iss), + SeqNum: iss, AckNum: c.IRS.Add(1), RcvWnd: 30000, }) @@ -5335,7 +5335,7 @@ func TestKeepalive(t *testing.T) { checker.IPv4(t, b, checker.TCP( checker.DstPort(context.TestPort), - checker.TCPSeqNum(uint32(next-1)), + checker.TCPSeqNum(next-1), checker.TCPAckNum(uint32(iss)), checker.TCPFlags(header.TCPFlagAck), ), @@ -5360,12 +5360,7 @@ func TestKeepalive(t *testing.T) { }) checker.IPv4(t, c.GetPacket(), - checker.TCP( - checker.DstPort(context.TestPort), - checker.TCPSeqNum(uint32(next)), - checker.TCPAckNum(uint32(0)), - checker.TCPFlags(header.TCPFlagRst), - ), + checker.TCP(checker.DstPort(context.TestPort), checker.TCPSeqNum(next), checker.TCPAckNum(uint32(0)), checker.TCPFlags(header.TCPFlagRst)), ) if got := c.Stack().Stats().TCP.EstablishedTimedout.Value(); got != 1 { @@ -5507,7 +5502,7 @@ func TestListenBacklogFull(t *testing.T) { // Now execute send one more SYN. The stack should not respond as the backlog // is full at this point. c.SendPacket(nil, &context.Headers{ - SrcPort: context.TestPort + uint16(lastPortOffset), + SrcPort: context.TestPort + lastPortOffset, DstPort: context.StackPort, Flags: header.TCPFlagSyn, SeqNum: seqnum.Value(context.TestInitialSequenceNumber), @@ -5884,7 +5879,7 @@ func TestListenSynRcvdQueueFull(t *testing.T) { r.Reset(data) newEP.Write(&r, tcpip.WriteOptions{}) pkt := c.GetPacket() - tcp = header.TCP(header.IPv4(pkt).Payload()) + tcp = header.IPv4(pkt).Payload() if string(tcp.Payload()) != data { t.Fatalf("unexpected data: got %s, want %s", string(tcp.Payload()), data) } @@ -6118,7 +6113,7 @@ func TestSynRcvdBadSeqNumber(t *testing.T) { } pkt := c.GetPacket() - tcpHdr = header.TCP(header.IPv4(pkt).Payload()) + tcpHdr = header.IPv4(pkt).Payload() if string(tcpHdr.Payload()) != data { t.Fatalf("unexpected data: got %s, want %s", string(tcpHdr.Payload()), data) } @@ -6243,6 +6238,54 @@ func TestPassiveFailedConnectionAttemptIncrement(t *testing.T) { } } +func TestListenDropIncrement(t *testing.T) { + c := context.New(t, defaultMTU) + defer c.Cleanup() + + stats := c.Stack().Stats() + c.Create(-1 /*epRcvBuf*/) + + if err := c.EP.Bind(tcpip.FullAddress{Addr: context.StackAddr, Port: context.StackPort}); err != nil { + t.Fatalf("Bind failed: %s", err) + } + if err := c.EP.Listen(1 /*backlog*/); err != nil { + t.Fatalf("Listen failed: %s", err) + } + + initialDropped := stats.DroppedPackets.Value() + + // Send RST, FIN segments, that are expected to be dropped by the listener. + c.SendPacket(nil, &context.Headers{ + SrcPort: context.TestPort, + DstPort: context.StackPort, + Flags: header.TCPFlagRst, + }) + c.SendPacket(nil, &context.Headers{ + SrcPort: context.TestPort, + DstPort: context.StackPort, + Flags: header.TCPFlagFin, + }) + + // To ensure that the RST, FIN sent earlier are indeed received and ignored + // by the listener, send a SYN and wait for the SYN to be ACKd. + irs := seqnum.Value(context.TestInitialSequenceNumber) + c.SendPacket(nil, &context.Headers{ + SrcPort: context.TestPort, + DstPort: context.StackPort, + Flags: header.TCPFlagSyn, + SeqNum: irs, + }) + checker.IPv4(t, c.GetPacket(), checker.TCP(checker.SrcPort(context.StackPort), + checker.DstPort(context.TestPort), + checker.TCPFlags(header.TCPFlagAck|header.TCPFlagSyn), + checker.TCPAckNum(uint32(irs)+1), + )) + + if got, want := stats.DroppedPackets.Value(), initialDropped+2; got != want { + t.Fatalf("got stats.DroppedPackets.Value() = %d, want = %d", got, want) + } +} + func TestEndpointBindListenAcceptState(t *testing.T) { c := context.New(t, defaultMTU) defer c.Cleanup() @@ -6375,7 +6418,7 @@ func TestReceiveBufferAutoTuningApplicationLimited(t *testing.T) { // Allocate a large enough payload for the test. payloadSize := receiveBufferSize * 2 - b := make([]byte, int(payloadSize)) + b := make([]byte, payloadSize) worker := (c.EP).(interface { StopWork() @@ -6429,7 +6472,7 @@ func TestReceiveBufferAutoTuningApplicationLimited(t *testing.T) { // ack, 1 for the non-zero window p := c.GetPacket() checker.IPv4(t, p, checker.TCP( - checker.TCPAckNum(uint32(wantAckNum)), + checker.TCPAckNum(wantAckNum), func(t *testing.T, h header.Transport) { tcp, ok := h.(header.TCP) if !ok { @@ -6484,14 +6527,14 @@ func TestReceiveBufferAutoTuning(t *testing.T) { c.WindowScale = uint8(tcp.FindWndScale(maxReceiveBufferSize)) rawEP := c.CreateConnectedWithOptions(header.TCPSynOptions{TS: true, WS: 4}) - tsVal := uint32(rawEP.TSVal) + tsVal := rawEP.TSVal rawEP.NextSeqNum-- rawEP.SendPacketWithTS(nil, tsVal) rawEP.NextSeqNum++ pkt := rawEP.VerifyAndReturnACKWithTS(tsVal) curRcvWnd := int(header.TCP(header.IPv4(pkt).Payload()).WindowSize()) << c.WindowScale scaleRcvWnd := func(rcvWnd int) uint16 { - return uint16(rcvWnd >> uint16(c.WindowScale)) + return uint16(rcvWnd >> c.WindowScale) } // Allocate a large array to send to the endpoint. b := make([]byte, receiveBufferSize*48) @@ -6619,19 +6662,16 @@ func TestDelayEnabled(t *testing.T) { defer c.Cleanup() checkDelayOption(t, c, false, false) // Delay is disabled by default. - for _, v := range []struct { - delayEnabled tcpip.TCPDelayEnabled - wantDelayOption bool - }{ - {delayEnabled: false, wantDelayOption: false}, - {delayEnabled: true, wantDelayOption: true}, - } { - c := context.New(t, defaultMTU) - defer c.Cleanup() - if err := c.Stack().SetTransportProtocolOption(tcp.ProtocolNumber, &v.delayEnabled); err != nil { - t.Fatalf("SetTransportProtocolOption(%d, &%T(%t)): %s", tcp.ProtocolNumber, v.delayEnabled, v.delayEnabled, err) - } - checkDelayOption(t, c, v.delayEnabled, v.wantDelayOption) + for _, delayEnabled := range []bool{false, true} { + t.Run(fmt.Sprintf("delayEnabled=%t", delayEnabled), func(t *testing.T) { + c := context.New(t, defaultMTU) + defer c.Cleanup() + opt := tcpip.TCPDelayEnabled(delayEnabled) + if err := c.Stack().SetTransportProtocolOption(tcp.ProtocolNumber, &opt); err != nil { + t.Fatalf("SetTransportProtocolOption(%d, &%T(%t)): %s", tcp.ProtocolNumber, opt, delayEnabled, err) + } + checkDelayOption(t, c, opt, delayEnabled) + }) } } @@ -7042,7 +7082,7 @@ func TestTCPTimeWaitNewSyn(t *testing.T) { // Receive the SYN-ACK reply. b = c.GetPacket() - tcpHdr = header.TCP(header.IPv4(b).Payload()) + tcpHdr = header.IPv4(b).Payload() c.IRS = seqnum.Value(tcpHdr.SequenceNumber()) ackHeaders = &context.Headers{ @@ -7467,7 +7507,7 @@ func TestTCPUserTimeout(t *testing.T) { checker.IPv4(t, c.GetPacket(), checker.TCP( checker.DstPort(context.TestPort), - checker.TCPSeqNum(uint32(next)), + checker.TCPSeqNum(next), checker.TCPAckNum(uint32(0)), checker.TCPFlags(header.TCPFlagRst), ), @@ -7545,7 +7585,7 @@ func TestKeepaliveWithUserTimeout(t *testing.T) { DstPort: c.Port, Flags: header.TCPFlagAck, SeqNum: iss, - AckNum: seqnum.Value(c.IRS + 1), + AckNum: c.IRS + 1, RcvWnd: 30000, }) diff --git a/pkg/tcpip/transport/tcp/timer.go b/pkg/tcpip/transport/tcp/timer.go index 38a335840..5645c772e 100644 --- a/pkg/tcpip/transport/tcp/timer.go +++ b/pkg/tcpip/transport/tcp/timer.go @@ -15,21 +15,29 @@ package tcp import ( + "math" "time" "gvisor.dev/gvisor/pkg/sleep" + "gvisor.dev/gvisor/pkg/tcpip" ) type timerState int const ( + // The timer is disabled. timerStateDisabled timerState = iota + // The timer is enabled, but the clock timer may be set to an earlier + // expiration time due to a previous orphaned state. timerStateEnabled + // The timer is disabled, but the clock timer is enabled, which means that + // it will cause a spurious wakeup unless the timer is enabled before the + // clock timer fires. timerStateOrphaned ) // timer is a timer implementation that reduces the interactions with the -// runtime timer infrastructure by letting timers run (and potentially +// clock timer infrastructure by letting timers run (and potentially // eventually expire) even if they are stopped. It makes it cheaper to // disable/reenable timers at the expense of spurious wakes. This is useful for // cases when the same timer is disabled/reenabled repeatedly with relatively @@ -39,44 +47,37 @@ const ( // (currently at least 200ms), and get disabled when acks are received, and // reenabled when new pending segments are sent. // -// It is advantageous to avoid interacting with the runtime because it acquires +// It is advantageous to avoid interacting with the clock because it acquires // a global mutex and performs O(log n) operations, where n is the global number // of timers, whenever a timer is enabled or disabled, and may make a syscall. // // This struct is thread-compatible. type timer struct { - // state is the current state of the timer, it can be one of the - // following values: - // disabled - the timer is disabled. - // orphaned - the timer is disabled, but the runtime timer is - // enabled, which means that it will evetually cause a - // spurious wake (unless it gets enabled again before - // then). - // enabled - the timer is enabled, but the runtime timer may be set - // to an earlier expiration time due to a previous - // orphaned state. state timerState + clock tcpip.Clock + // target is the expiration time of the current timer. It is only // meaningful in the enabled state. - target time.Time + target tcpip.MonotonicTime - // runtimeTarget is the expiration time of the runtime timer. It is + // clockTarget is the expiration time of the clock timer. It is // meaningful in the enabled and orphaned states. - runtimeTarget time.Time + clockTarget tcpip.MonotonicTime - // timer is the runtime timer used to wait on. - timer *time.Timer + // timer is the clock timer used to wait on. + timer tcpip.Timer } // init initializes the timer. Once it expires, it the given waker will be // asserted. -func (t *timer) init(w *sleep.Waker) { +func (t *timer) init(clock tcpip.Clock, w *sleep.Waker) { t.state = timerStateDisabled + t.clock = clock - // Initialize a runtime timer that will assert the waker, then + // Initialize a clock timer that will assert the waker, then // immediately stop it. - t.timer = time.AfterFunc(time.Hour, func() { + t.timer = t.clock.AfterFunc(math.MaxInt64, func() { w.Assert() }) t.timer.Stop() @@ -106,9 +107,9 @@ func (t *timer) checkExpiration() bool { // The timer is enabled, but it may have expired early. Check if that's // the case, and if so, reset the runtime timer to the correct time. - now := time.Now() + now := t.clock.NowMonotonic() if now.Before(t.target) { - t.runtimeTarget = t.target + t.clockTarget = t.target t.timer.Reset(t.target.Sub(now)) return false } @@ -134,11 +135,11 @@ func (t *timer) enabled() bool { // enable enables the timer, programming the runtime timer if necessary. func (t *timer) enable(d time.Duration) { - t.target = time.Now().Add(d) + t.target = t.clock.NowMonotonic().Add(d) // Check if we need to set the runtime timer. - if t.state == timerStateDisabled || t.target.Before(t.runtimeTarget) { - t.runtimeTarget = t.target + if t.state == timerStateDisabled || t.target.Before(t.clockTarget) { + t.clockTarget = t.target t.timer.Reset(d) } diff --git a/pkg/tcpip/transport/tcp/timer_test.go b/pkg/tcpip/transport/tcp/timer_test.go index dbd6dff54..479752de7 100644 --- a/pkg/tcpip/transport/tcp/timer_test.go +++ b/pkg/tcpip/transport/tcp/timer_test.go @@ -19,6 +19,7 @@ import ( "time" "gvisor.dev/gvisor/pkg/sleep" + "gvisor.dev/gvisor/pkg/tcpip/faketime" ) func TestCleanup(t *testing.T) { @@ -27,9 +28,11 @@ func TestCleanup(t *testing.T) { isAssertedTimeoutSeconds = timerDurationSeconds + 1 ) + clock := faketime.NewManualClock() + tmr := timer{} w := sleep.Waker{} - tmr.init(&w) + tmr.init(clock, &w) tmr.enable(timerDurationSeconds * time.Second) tmr.cleanup() @@ -39,7 +42,7 @@ func TestCleanup(t *testing.T) { // The waker should not be asserted. for i := 0; i < isAssertedTimeoutSeconds; i++ { - time.Sleep(time.Second) + clock.Advance(time.Second) if w.IsAsserted() { t.Fatalf("waker asserted unexpectedly") } diff --git a/pkg/tcpip/transport/udp/BUILD b/pkg/tcpip/transport/udp/BUILD index dd5c910ae..cdc344ab7 100644 --- a/pkg/tcpip/transport/udp/BUILD +++ b/pkg/tcpip/transport/udp/BUILD @@ -49,6 +49,7 @@ go_test( "//pkg/tcpip", "//pkg/tcpip/buffer", "//pkg/tcpip/checker", + "//pkg/tcpip/faketime", "//pkg/tcpip/header", "//pkg/tcpip/link/channel", "//pkg/tcpip/link/loopback", diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go index f7dd50d35..def9d7186 100644 --- a/pkg/tcpip/transport/udp/endpoint.go +++ b/pkg/tcpip/transport/udp/endpoint.go @@ -17,6 +17,7 @@ package udp import ( "io" "sync/atomic" + "time" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" @@ -34,25 +35,26 @@ type udpPacket struct { destinationAddress tcpip.FullAddress packetInfo tcpip.IPPacketInfo data buffer.VectorisedView `state:".(buffer.VectorisedView)"` - timestamp int64 + receivedAt time.Time `state:".(int64)"` // tos stores either the receiveTOS or receiveTClass value. tos uint8 } // EndpointState represents the state of a UDP endpoint. -type EndpointState uint32 +type EndpointState tcpip.EndpointState // Endpoint states. Note that are represented in a netstack-specific manner and // may not be meaningful externally. Specifically, they need to be translated to // Linux's representation for these states if presented to userspace. const ( - StateInitial EndpointState = iota + _ EndpointState = iota + StateInitial StateBound StateConnected StateClosed ) -// String implements fmt.Stringer.String. +// String implements fmt.Stringer. func (s EndpointState) String() string { switch s { case StateInitial: @@ -98,7 +100,7 @@ type endpoint struct { mu sync.RWMutex `state:"nosave"` // state must be read/set using the EndpointState()/setEndpointState() // methods. - state EndpointState + state uint32 route *stack.Route `state:"manual"` dstPort uint16 ttl uint8 @@ -176,7 +178,7 @@ func newEndpoint(s *stack.Stack, netProto tcpip.NetworkProtocolNumber, waiterQue // Linux defaults to TTL=1. multicastTTL: 1, multicastMemberships: make(map[multicastMembership]struct{}), - state: StateInitial, + state: uint32(StateInitial), uniqueID: s.UniqueID(), } e.ops.InitHandler(e, e.stack, tcpip.GetStackSendBufferLimits, tcpip.GetStackReceiveBufferLimits) @@ -204,15 +206,15 @@ func newEndpoint(s *stack.Stack, netProto tcpip.NetworkProtocolNumber, waiterQue // // Precondition: e.mu must be held to call this method. func (e *endpoint) setEndpointState(state EndpointState) { - atomic.StoreUint32((*uint32)(&e.state), uint32(state)) + atomic.StoreUint32(&e.state, uint32(state)) } // EndpointState() returns the current state of the endpoint. func (e *endpoint) EndpointState() EndpointState { - return EndpointState(atomic.LoadUint32((*uint32)(&e.state))) + return EndpointState(atomic.LoadUint32(&e.state)) } -// UniqueID implements stack.TransportEndpoint.UniqueID. +// UniqueID implements stack.TransportEndpoint. func (e *endpoint) UniqueID() uint64 { return e.uniqueID } @@ -226,14 +228,14 @@ func (e *endpoint) LastError() tcpip.Error { return err } -// UpdateLastError implements tcpip.SocketOptionsHandler.UpdateLastError. +// UpdateLastError implements tcpip.SocketOptionsHandler. func (e *endpoint) UpdateLastError(err tcpip.Error) { e.lastErrorMu.Lock() e.lastError = err e.lastErrorMu.Unlock() } -// Abort implements stack.TransportEndpoint.Abort. +// Abort implements stack.TransportEndpoint. func (e *endpoint) Abort() { e.Close() } @@ -289,10 +291,10 @@ func (e *endpoint) Close() { e.waiterQueue.Notify(waiter.EventHUp | waiter.EventErr | waiter.ReadableEvents | waiter.WritableEvents) } -// ModerateRecvBuf implements tcpip.Endpoint.ModerateRecvBuf. -func (e *endpoint) ModerateRecvBuf(copied int) {} +// ModerateRecvBuf implements tcpip.Endpoint. +func (*endpoint) ModerateRecvBuf(int) {} -// Read implements tcpip.Endpoint.Read. +// Read implements tcpip.Endpoint. func (e *endpoint) Read(dst io.Writer, opts tcpip.ReadOptions) (tcpip.ReadResult, tcpip.Error) { if err := e.LastError(); err != nil { return tcpip.ReadResult{}, err @@ -320,7 +322,7 @@ func (e *endpoint) Read(dst io.Writer, opts tcpip.ReadOptions) (tcpip.ReadResult // Control Messages cm := tcpip.ControlMessages{ HasTimestamp: true, - Timestamp: p.timestamp, + Timestamp: p.receivedAt.UnixNano(), } if e.ops.GetReceiveTOS() { cm.HasTOS = true @@ -581,21 +583,21 @@ func (e *endpoint) write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, tcp return int64(len(v)), nil } -// OnReuseAddressSet implements tcpip.SocketOptionsHandler.OnReuseAddressSet. +// OnReuseAddressSet implements tcpip.SocketOptionsHandler. func (e *endpoint) OnReuseAddressSet(v bool) { e.mu.Lock() e.portFlags.MostRecent = v e.mu.Unlock() } -// OnReusePortSet implements tcpip.SocketOptionsHandler.OnReusePortSet. +// OnReusePortSet implements tcpip.SocketOptionsHandler. func (e *endpoint) OnReusePortSet(v bool) { e.mu.Lock() e.portFlags.LoadBalanced = v e.mu.Unlock() } -// SetSockOptInt implements tcpip.Endpoint.SetSockOptInt. +// SetSockOptInt implements tcpip.Endpoint. func (e *endpoint) SetSockOptInt(opt tcpip.SockOptInt, v int) tcpip.Error { switch opt { case tcpip.MTUDiscoverOption: @@ -629,11 +631,14 @@ func (e *endpoint) SetSockOptInt(opt tcpip.SockOptInt, v int) tcpip.Error { return nil } +var _ tcpip.SocketOptionsHandler = (*endpoint)(nil) + +// HasNIC implements tcpip.SocketOptionsHandler. func (e *endpoint) HasNIC(id int32) bool { - return id == 0 || e.stack.HasNIC(tcpip.NICID(id)) + return e.stack.HasNIC(tcpip.NICID(id)) } -// SetSockOpt implements tcpip.Endpoint.SetSockOpt. +// SetSockOpt implements tcpip.Endpoint. func (e *endpoint) SetSockOpt(opt tcpip.SettableSocketOption) tcpip.Error { switch v := opt.(type) { case *tcpip.MulticastInterfaceOption: @@ -749,7 +754,7 @@ func (e *endpoint) SetSockOpt(opt tcpip.SettableSocketOption) tcpip.Error { return nil } -// GetSockOptInt implements tcpip.Endpoint.GetSockOptInt. +// GetSockOptInt implements tcpip.Endpoint. func (e *endpoint) GetSockOptInt(opt tcpip.SockOptInt) (int, tcpip.Error) { switch opt { case tcpip.IPv4TOSOption: @@ -795,14 +800,14 @@ func (e *endpoint) GetSockOptInt(opt tcpip.SockOptInt) (int, tcpip.Error) { } } -// GetSockOpt implements tcpip.Endpoint.GetSockOpt. +// GetSockOpt implements tcpip.Endpoint. func (e *endpoint) GetSockOpt(opt tcpip.GettableSocketOption) tcpip.Error { switch o := opt.(type) { case *tcpip.MulticastInterfaceOption: e.mu.Lock() *o = tcpip.MulticastInterfaceOption{ - e.multicastNICID, - e.multicastAddr, + NIC: e.multicastNICID, + InterfaceAddr: e.multicastAddr, } e.mu.Unlock() @@ -872,7 +877,7 @@ func (e *endpoint) checkV4MappedLocked(addr tcpip.FullAddress) (tcpip.FullAddres return unwrapped, netProto, nil } -// Disconnect implements tcpip.Endpoint.Disconnect. +// Disconnect implements tcpip.Endpoint. func (e *endpoint) Disconnect() tcpip.Error { e.mu.Lock() defer e.mu.Unlock() @@ -1075,7 +1080,7 @@ func (e *endpoint) registerWithStack(netProtos []tcpip.NetworkProtocolNumber, id BindToDevice: bindToDevice, Dest: tcpip.FullAddress{}, } - port, err := e.stack.ReservePort(portRes, nil /* testPort */) + port, err := e.stack.ReservePort(e.stack.Rand(), portRes, nil /* testPort */) if err != nil { return id, bindToDevice, err } @@ -1301,12 +1306,12 @@ func (e *endpoint) HandlePacket(id stack.TransportEndpointID, pkt *stack.PacketB senderAddress: tcpip.FullAddress{ NIC: pkt.NICID, Addr: id.RemoteAddress, - Port: header.UDP(hdr).SourcePort(), + Port: hdr.SourcePort(), }, destinationAddress: tcpip.FullAddress{ NIC: pkt.NICID, Addr: id.LocalAddress, - Port: header.UDP(hdr).DestinationPort(), + Port: hdr.DestinationPort(), }, data: pkt.Data().ExtractVV(), } @@ -1328,7 +1333,7 @@ func (e *endpoint) HandlePacket(id stack.TransportEndpointID, pkt *stack.PacketB packet.packetInfo.LocalAddr = localAddr packet.packetInfo.DestinationAddr = localAddr packet.packetInfo.NIC = pkt.NICID - packet.timestamp = e.stack.Clock().NowNanoseconds() + packet.receivedAt = e.stack.Clock().Now() e.rcvMu.Unlock() @@ -1386,7 +1391,7 @@ func (e *endpoint) HandleError(transErr stack.TransportError, pkt *stack.PacketB } } -// State implements tcpip.Endpoint.State. +// State implements tcpip.Endpoint. func (e *endpoint) State() uint32 { return uint32(e.EndpointState()) } @@ -1405,19 +1410,19 @@ func (e *endpoint) Stats() tcpip.EndpointStats { return &e.stats } -// Wait implements tcpip.Endpoint.Wait. +// Wait implements tcpip.Endpoint. func (*endpoint) Wait() {} func (e *endpoint) isBroadcastOrMulticast(nicID tcpip.NICID, netProto tcpip.NetworkProtocolNumber, addr tcpip.Address) bool { return addr == header.IPv4Broadcast || header.IsV4MulticastAddress(addr) || header.IsV6MulticastAddress(addr) || e.stack.IsSubnetBroadcast(nicID, netProto, addr) } -// SetOwner implements tcpip.Endpoint.SetOwner. +// SetOwner implements tcpip.Endpoint. func (e *endpoint) SetOwner(owner tcpip.PacketOwner) { e.owner = owner } -// SocketOptions implements tcpip.Endpoint.SocketOptions. +// SocketOptions implements tcpip.Endpoint. func (e *endpoint) SocketOptions() *tcpip.SocketOptions { return &e.ops } diff --git a/pkg/tcpip/transport/udp/endpoint_state.go b/pkg/tcpip/transport/udp/endpoint_state.go index 4aba68b21..1f638c3f6 100644 --- a/pkg/tcpip/transport/udp/endpoint_state.go +++ b/pkg/tcpip/transport/udp/endpoint_state.go @@ -15,26 +15,38 @@ package udp import ( + "time" + "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/pkg/tcpip/stack" ) +// saveReceivedAt is invoked by stateify. +func (p *udpPacket) saveReceivedAt() int64 { + return p.receivedAt.UnixNano() +} + +// loadReceivedAt is invoked by stateify. +func (p *udpPacket) loadReceivedAt(nsec int64) { + p.receivedAt = time.Unix(0, nsec) +} + // saveData saves udpPacket.data field. -func (u *udpPacket) saveData() buffer.VectorisedView { - // We cannot save u.data directly as u.data.views may alias to u.views, +func (p *udpPacket) saveData() buffer.VectorisedView { + // We cannot save p.data directly as p.data.views may alias to p.views, // which is not allowed by state framework (in-struct pointer). - return u.data.Clone(nil) + return p.data.Clone(nil) } // loadData loads udpPacket.data field. -func (u *udpPacket) loadData(data buffer.VectorisedView) { - // NOTE: We cannot do the u.data = data.Clone(u.views[:]) optimization +func (p *udpPacket) loadData(data buffer.VectorisedView) { + // NOTE: We cannot do the p.data = data.Clone(p.views[:]) optimization // here because data.views is not guaranteed to be loaded by now. Plus, // data.views will be allocated anyway so there really is little point - // of utilizing u.views for data.views. - u.data = data + // of utilizing p.views for data.views. + p.data = data } // afterLoad is invoked by stateify. diff --git a/pkg/tcpip/transport/udp/forwarder.go b/pkg/tcpip/transport/udp/forwarder.go index 705ad1f64..7c357cb09 100644 --- a/pkg/tcpip/transport/udp/forwarder.go +++ b/pkg/tcpip/transport/udp/forwarder.go @@ -90,7 +90,7 @@ func (r *ForwarderRequest) CreateEndpoint(queue *waiter.Queue) (tcpip.Endpoint, ep.RegisterNICID = r.pkt.NICID ep.boundPortFlags = ep.portFlags - ep.state = StateConnected + ep.state = uint32(StateConnected) ep.rcvMu.Lock() ep.rcvReady = true diff --git a/pkg/tcpip/transport/udp/udp_test.go b/pkg/tcpip/transport/udp/udp_test.go index dc2e3f493..4008cacf2 100644 --- a/pkg/tcpip/transport/udp/udp_test.go +++ b/pkg/tcpip/transport/udp/udp_test.go @@ -16,17 +16,16 @@ package udp_test import ( "bytes" - "context" "fmt" "io/ioutil" "math/rand" "testing" - "time" "github.com/google/go-cmp/cmp" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/buffer" "gvisor.dev/gvisor/pkg/tcpip/checker" + "gvisor.dev/gvisor/pkg/tcpip/faketime" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/pkg/tcpip/link/channel" "gvisor.dev/gvisor/pkg/tcpip/link/loopback" @@ -298,16 +297,18 @@ type testContext struct { func newDualTestContext(t *testing.T, mtu uint32) *testContext { t.Helper() - return newDualTestContextWithOptions(t, mtu, stack.Options{ - NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol}, - TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol, icmp.NewProtocol6, icmp.NewProtocol4}, - HandleLocal: true, - }) + return newDualTestContextWithHandleLocal(t, mtu, true) } -func newDualTestContextWithOptions(t *testing.T, mtu uint32, options stack.Options) *testContext { +func newDualTestContextWithHandleLocal(t *testing.T, mtu uint32, handleLocal bool) *testContext { t.Helper() + options := stack.Options{ + NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol}, + TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol, icmp.NewProtocol6, icmp.NewProtocol4}, + HandleLocal: handleLocal, + Clock: &faketime.NullClock{}, + } s := stack.New(options) ep := channel.New(256, mtu, "") wep := stack.LinkEndpoint(ep) @@ -378,9 +379,7 @@ func (c *testContext) createEndpointForFlow(flow testFlow) { func (c *testContext) getPacketAndVerify(flow testFlow, checkers ...checker.NetworkChecker) []byte { c.t.Helper() - ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second) - defer cancel() - p, ok := c.linkEP.ReadContext(ctx) + p, ok := c.linkEP.Read() if !ok { c.t.Fatalf("Packet wasn't written out") return nil @@ -534,7 +533,9 @@ func newMinPayload(minSize int) []byte { func TestBindToDeviceOption(t *testing.T) { s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol}, - TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol}}) + TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol}, + Clock: &faketime.NullClock{}, + }) ep, err := s.NewEndpoint(udp.ProtocolNumber, ipv4.ProtocolNumber, &waiter.Queue{}) if err != nil { @@ -606,7 +607,7 @@ func testReadInternal(c *testContext, flow testFlow, packetShouldBeDropped, expe case <-ch: res, err = c.ep.Read(&buf, tcpip.ReadOptions{NeedRemoteAddr: true}) - case <-time.After(300 * time.Millisecond): + default: if packetShouldBeDropped { return // expected to time out } @@ -820,11 +821,7 @@ func TestV4ReadSelfSource(t *testing.T) { {"NoHandleLocal", true, &tcpip.ErrWouldBlock{}, 1}, } { t.Run(tt.name, func(t *testing.T) { - c := newDualTestContextWithOptions(t, defaultMTU, stack.Options{ - NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol}, - TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol}, - HandleLocal: tt.handleLocal, - }) + c := newDualTestContextWithHandleLocal(t, defaultMTU, tt.handleLocal) defer c.cleanup() c.createEndpointForFlow(unicastV4) @@ -1034,17 +1031,17 @@ func testWriteAndVerifyInternal(c *testContext, flow testFlow, setDest bool, che payload := testWriteNoVerify(c, flow, setDest) // Received the packet and check the payload. b := c.getPacketAndVerify(flow, checkers...) - var udp header.UDP + var udpH header.UDP if flow.isV4() { - udp = header.UDP(header.IPv4(b).Payload()) + udpH = header.IPv4(b).Payload() } else { - udp = header.UDP(header.IPv6(b).Payload()) + udpH = header.IPv6(b).Payload() } - if !bytes.Equal(payload, udp.Payload()) { - c.t.Fatalf("Bad payload: got %x, want %x", udp.Payload(), payload) + if !bytes.Equal(payload, udpH.Payload()) { + c.t.Fatalf("Bad payload: got %x, want %x", udpH.Payload(), payload) } - return udp.SourcePort() + return udpH.SourcePort() } func testDualWrite(c *testContext) uint16 { @@ -1198,7 +1195,7 @@ func TestWriteOnConnectedInvalidPort(t *testing.T) { r.Reset(payload) n, err := c.ep.Write(&r, writeOpts) if err != nil { - c.t.Fatalf("c.ep.Write(...) = %+s, want nil", err) + c.t.Fatalf("c.ep.Write(...) = %s, want nil", err) } if got, want := n, int64(len(payload)); got != want { c.t.Fatalf("c.ep.Write(...) wrote %d bytes, want %d bytes", got, want) @@ -1462,7 +1459,7 @@ func TestReadRecvOriginalDstAddr(t *testing.T) { name: "IPv4 unicast", proto: header.IPv4ProtocolNumber, flow: unicastV4, - expectedOriginalDstAddr: tcpip.FullAddress{1, stackAddr, stackPort}, + expectedOriginalDstAddr: tcpip.FullAddress{NIC: 1, Addr: stackAddr, Port: stackPort}, }, { name: "IPv4 multicast", @@ -1474,7 +1471,7 @@ func TestReadRecvOriginalDstAddr(t *testing.T) { // behaviour. We still include the test so that once the bug is // resolved, this test will start to fail and the individual tasked // with fixing this bug knows to also fix this test :). - expectedOriginalDstAddr: tcpip.FullAddress{1, multicastAddr, stackPort}, + expectedOriginalDstAddr: tcpip.FullAddress{NIC: 1, Addr: multicastAddr, Port: stackPort}, }, { name: "IPv4 broadcast", @@ -1486,13 +1483,13 @@ func TestReadRecvOriginalDstAddr(t *testing.T) { // behaviour. We still include the test so that once the bug is // resolved, this test will start to fail and the individual tasked // with fixing this bug knows to also fix this test :). - expectedOriginalDstAddr: tcpip.FullAddress{1, broadcastAddr, stackPort}, + expectedOriginalDstAddr: tcpip.FullAddress{NIC: 1, Addr: broadcastAddr, Port: stackPort}, }, { name: "IPv6 unicast", proto: header.IPv6ProtocolNumber, flow: unicastV6, - expectedOriginalDstAddr: tcpip.FullAddress{1, stackV6Addr, stackPort}, + expectedOriginalDstAddr: tcpip.FullAddress{NIC: 1, Addr: stackV6Addr, Port: stackPort}, }, { name: "IPv6 multicast", @@ -1504,7 +1501,7 @@ func TestReadRecvOriginalDstAddr(t *testing.T) { // behaviour. We still include the test so that once the bug is // resolved, this test will start to fail and the individual tasked // with fixing this bug knows to also fix this test :). - expectedOriginalDstAddr: tcpip.FullAddress{1, multicastV6Addr, stackPort}, + expectedOriginalDstAddr: tcpip.FullAddress{NIC: 1, Addr: multicastV6Addr, Port: stackPort}, }, } @@ -1614,6 +1611,7 @@ func TestTTL(t *testing.T) { } s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{p}, + Clock: &faketime.NullClock{}, }) ep := s.NetworkProtocolInstance(n).NewEndpoint(&testInterface{}, nil) wantTTL = ep.DefaultTTL() @@ -1759,7 +1757,7 @@ func TestReceiveTosTClass(t *testing.T) { c.t.Errorf("got GetSockOptBool(%s) = %t, want = %t", name, v, false) } - want := true + const want = true optionSetter(want) got := optionGetter() @@ -1889,18 +1887,14 @@ func TestV4UnknownDestination(t *testing.T) { } } if !tc.icmpRequired { - ctx, cancel := context.WithTimeout(context.Background(), time.Second) - defer cancel() - if p, ok := c.linkEP.ReadContext(ctx); ok { + if p, ok := c.linkEP.Read(); ok { t.Fatalf("unexpected packet received: %+v", p) } return } // ICMP required. - ctx, cancel := context.WithTimeout(context.Background(), time.Second) - defer cancel() - p, ok := c.linkEP.ReadContext(ctx) + p, ok := c.linkEP.Read() if !ok { t.Fatalf("packet wasn't written out") return @@ -1987,18 +1981,14 @@ func TestV6UnknownDestination(t *testing.T) { } } if !tc.icmpRequired { - ctx, cancel := context.WithTimeout(context.Background(), time.Second) - defer cancel() - if p, ok := c.linkEP.ReadContext(ctx); ok { + if p, ok := c.linkEP.Read(); ok { t.Fatalf("unexpected packet received: %+v", p) } return } // ICMP required. - ctx, cancel := context.WithTimeout(context.Background(), time.Second) - defer cancel() - p, ok := c.linkEP.ReadContext(ctx) + p, ok := c.linkEP.Read() if !ok { t.Fatalf("packet wasn't written out") return @@ -2115,8 +2105,8 @@ func TestShortHeader(t *testing.T) { Data: buf.ToVectorisedView(), })) - if got, want := c.s.Stats().MalformedRcvdPackets.Value(), uint64(1); got != want { - t.Errorf("got c.s.Stats().MalformedRcvdPackets.Value() = %d, want = %d", got, want) + if got, want := c.s.Stats().NICs.MalformedL4RcvdPackets.Value(), uint64(1); got != want { + t.Errorf("got c.s.Stats().NIC.MalformedL4RcvdPackets.Value() = %d, want = %d", got, want) } } @@ -2124,25 +2114,27 @@ func TestShortHeader(t *testing.T) { // global and endpoint stats are incremented. func TestBadChecksumErrors(t *testing.T) { for _, flow := range []testFlow{unicastV4, unicastV6} { - c := newDualTestContext(t, defaultMTU) - defer c.cleanup() + t.Run(flow.String(), func(t *testing.T) { + c := newDualTestContext(t, defaultMTU) + defer c.cleanup() - c.createEndpoint(flow.sockProto()) - // Bind to wildcard. - if err := c.ep.Bind(tcpip.FullAddress{Port: stackPort}); err != nil { - c.t.Fatalf("Bind failed: %s", err) - } + c.createEndpoint(flow.sockProto()) + // Bind to wildcard. + if err := c.ep.Bind(tcpip.FullAddress{Port: stackPort}); err != nil { + c.t.Fatalf("Bind failed: %s", err) + } - payload := newPayload() - c.injectPacket(flow, payload, true /* badChecksum */) + payload := newPayload() + c.injectPacket(flow, payload, true /* badChecksum */) - const want = 1 - if got := c.s.Stats().UDP.ChecksumErrors.Value(); got != want { - t.Errorf("got stats.UDP.ChecksumErrors.Value() = %d, want = %d", got, want) - } - if got := c.ep.Stats().(*tcpip.TransportEndpointStats).ReceiveErrors.ChecksumErrors.Value(); got != want { - t.Errorf("got EP Stats.ReceiveErrors.ChecksumErrors stats = %d, want = %d", got, want) - } + const want = 1 + if got := c.s.Stats().UDP.ChecksumErrors.Value(); got != want { + t.Errorf("got stats.UDP.ChecksumErrors.Value() = %d, want = %d", got, want) + } + if got := c.ep.Stats().(*tcpip.TransportEndpointStats).ReceiveErrors.ChecksumErrors.Value(); got != want { + t.Errorf("got EP Stats.ReceiveErrors.ChecksumErrors stats = %d, want = %d", got, want) + } + }) } } @@ -2484,6 +2476,7 @@ func TestOutgoingSubnetBroadcast(t *testing.T) { s := stack.New(stack.Options{ NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol}, TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol}, + Clock: &faketime.NullClock{}, }) e := channel.New(0, defaultMTU, "") if err := s.CreateNIC(nicID1, e); err != nil { diff --git a/pkg/test/testutil/BUILD b/pkg/test/testutil/BUILD index a789c246e..7ff13cf12 100644 --- a/pkg/test/testutil/BUILD +++ b/pkg/test/testutil/BUILD @@ -12,6 +12,7 @@ go_library( ], visibility = ["//:sandbox"], deps = [ + "//pkg/sentry/watchdog", "//pkg/sync", "//runsc/config", "//runsc/specutils", diff --git a/pkg/test/testutil/testutil.go b/pkg/test/testutil/testutil.go index 663c83679..f6a3e34c7 100644 --- a/pkg/test/testutil/testutil.go +++ b/pkg/test/testutil/testutil.go @@ -42,6 +42,7 @@ import ( "github.com/cenkalti/backoff" specs "github.com/opencontainers/runtime-spec/specs-go" "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/sentry/watchdog" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/runsc/config" "gvisor.dev/gvisor/runsc/specutils" @@ -184,6 +185,7 @@ func TestConfig(t *testing.T) *config.Config { conf.Network = config.NetworkNone conf.Strace = true conf.TestOnlyAllowRunAsCurrentUserWithoutChroot = true + conf.WatchdogAction = watchdog.Panic return conf } diff --git a/pkg/usermem/BUILD b/pkg/usermem/BUILD index 3dba36f12..d7decd78a 100644 --- a/pkg/usermem/BUILD +++ b/pkg/usermem/BUILD @@ -7,6 +7,7 @@ go_library( srcs = [ "bytes_io.go", "bytes_io_unsafe.go", + "marshal.go", "usermem.go", ], visibility = ["//:sandbox"], diff --git a/pkg/usermem/marshal.go b/pkg/usermem/marshal.go new file mode 100644 index 000000000..5b5a662dc --- /dev/null +++ b/pkg/usermem/marshal.go @@ -0,0 +1,43 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package usermem + +import ( + "gvisor.dev/gvisor/pkg/context" + "gvisor.dev/gvisor/pkg/hostarch" +) + +// IOCopyContext wraps an object implementing hostarch.IO to implement +// marshal.CopyContext. +type IOCopyContext struct { + Ctx context.Context + IO IO + Opts IOOpts +} + +// CopyScratchBuffer implements marshal.CopyContext.CopyScratchBuffer. +func (i *IOCopyContext) CopyScratchBuffer(size int) []byte { + return make([]byte, size) +} + +// CopyOutBytes implements marshal.CopyContext.CopyOutBytes. +func (i *IOCopyContext) CopyOutBytes(addr hostarch.Addr, b []byte) (int, error) { + return i.IO.CopyOut(i.Ctx, addr, b, i.Opts) +} + +// CopyInBytes implements marshal.CopyContext.CopyInBytes. +func (i *IOCopyContext) CopyInBytes(addr hostarch.Addr, b []byte) (int, error) { + return i.IO.CopyIn(i.Ctx, addr, b, i.Opts) +} diff --git a/runsc/boot/BUILD b/runsc/boot/BUILD index d51347fe1..a79afbdc4 100644 --- a/runsc/boot/BUILD +++ b/runsc/boot/BUILD @@ -38,7 +38,6 @@ go_library( "//pkg/fspath", "//pkg/log", "//pkg/memutil", - "//pkg/metric", "//pkg/rand", "//pkg/refs", "//pkg/refsvfs2", diff --git a/runsc/boot/filter/config.go b/runsc/boot/filter/config.go index 49b503f99..752fea0e1 100644 --- a/runsc/boot/filter/config.go +++ b/runsc/boot/filter/config.go @@ -200,6 +200,12 @@ var allowedSyscalls = seccomp.SyscallRules{ seccomp.MatchAny{}, seccomp.MatchAny{}, seccomp.MatchAny{}, + seccomp.EqualTo(unix.MAP_SHARED | unix.MAP_FIXED), + }, + { + seccomp.MatchAny{}, + seccomp.MatchAny{}, + seccomp.MatchAny{}, seccomp.EqualTo(unix.MAP_PRIVATE), }, { @@ -265,7 +271,6 @@ var allowedSyscalls = seccomp.SyscallRules{ seccomp.MatchAny{}, seccomp.MatchAny{}, seccomp.EqualTo(unix.MSG_DONTWAIT), - seccomp.EqualTo(0), }, }, unix.SYS_RESTART_SYSCALL: {}, diff --git a/runsc/boot/fs.go b/runsc/boot/fs.go index bf4a41f77..c4590aab1 100644 --- a/runsc/boot/fs.go +++ b/runsc/boot/fs.go @@ -763,12 +763,10 @@ func (c *containerMounter) createRootMount(ctx context.Context, conf *config.Con p9FS := mustFindFilesystem("9p") opts := p9MountData(fd, conf.FileAccess, false /* vfs2 */) - if conf.OverlayfsStaleRead { - // We can't check for overlayfs here because sandbox is chroot'ed and gofer - // can only send mount options for specs.Mounts (specs.Root is missing - // Options field). So assume root is always on top of overlayfs. - opts = append(opts, "overlayfs_stale_read") - } + // We can't check for overlayfs here because sandbox is chroot'ed and gofer + // can only send mount options for specs.Mounts (specs.Root is missing + // Options field). So assume root is always on top of overlayfs. + opts = append(opts, "overlayfs_stale_read") rootInode, err := p9FS.Mount(ctx, rootDevice, mf, strings.Join(opts, ","), nil) if err != nil { diff --git a/runsc/boot/loader.go b/runsc/boot/loader.go index 10f2d3d35..ad4d50008 100644 --- a/runsc/boot/loader.go +++ b/runsc/boot/loader.go @@ -34,11 +34,9 @@ import ( "gvisor.dev/gvisor/pkg/fd" "gvisor.dev/gvisor/pkg/log" "gvisor.dev/gvisor/pkg/memutil" - "gvisor.dev/gvisor/pkg/metric" "gvisor.dev/gvisor/pkg/rand" "gvisor.dev/gvisor/pkg/refs" "gvisor.dev/gvisor/pkg/refsvfs2" - "gvisor.dev/gvisor/pkg/sentry/arch" "gvisor.dev/gvisor/pkg/sentry/control" "gvisor.dev/gvisor/pkg/sentry/fdimport" "gvisor.dev/gvisor/pkg/sentry/fs" @@ -211,15 +209,13 @@ func New(args Args) (*Loader, error) { // We initialize the rand package now to make sure /dev/urandom is pre-opened // on kernels that do not support getrandom(2). if err := rand.Init(); err != nil { - return nil, fmt.Errorf("setting up rand: %v", err) + return nil, fmt.Errorf("setting up rand: %w", err) } if err := usage.Init(); err != nil { - return nil, fmt.Errorf("setting up memory usage: %v", err) + return nil, fmt.Errorf("setting up memory usage: %w", err) } - metric.CreateSentryMetrics() - // Is this a VFSv2 kernel? if args.Conf.VFS2 { kernel.VFS2Enabled = true @@ -260,7 +256,7 @@ func New(args Args) (*Loader, error) { // Create kernel and platform. p, err := createPlatform(args.Conf, args.Device) if err != nil { - return nil, fmt.Errorf("creating platform: %v", err) + return nil, fmt.Errorf("creating platform: %w", err) } k := &kernel.Kernel{ Platform: p, @@ -269,7 +265,7 @@ func New(args Args) (*Loader, error) { // Create memory file. mf, err := createMemoryFile() if err != nil { - return nil, fmt.Errorf("creating memory file: %v", err) + return nil, fmt.Errorf("creating memory file: %w", err) } k.SetMemoryFile(mf) @@ -278,30 +274,31 @@ func New(args Args) (*Loader, error) { // Pass k as the platform since it is savable, unlike the actual platform. vdso, err := loader.PrepareVDSO(k) if err != nil { - return nil, fmt.Errorf("creating vdso: %v", err) + return nil, fmt.Errorf("creating vdso: %w", err) } // Create timekeeper. tk, err := kernel.NewTimekeeper(k, vdso.ParamPage.FileRange()) if err != nil { - return nil, fmt.Errorf("creating timekeeper: %v", err) + return nil, fmt.Errorf("creating timekeeper: %w", err) } tk.SetClocks(time.NewCalibratedClocks()) + k.SetTimekeeper(tk) if err := enableStrace(args.Conf); err != nil { - return nil, fmt.Errorf("enabling strace: %v", err) + return nil, fmt.Errorf("enabling strace: %w", err) } // Create root network namespace/stack. netns, err := newRootNetworkNamespace(args.Conf, k, k) if err != nil { - return nil, fmt.Errorf("creating network: %v", err) + return nil, fmt.Errorf("creating network: %w", err) } // Create capabilities. caps, err := specutils.Capabilities(args.Conf.EnableRaw, args.Spec.Process.Capabilities) if err != nil { - return nil, fmt.Errorf("converting capabilities: %v", err) + return nil, fmt.Errorf("converting capabilities: %w", err) } // Convert the spec's additional GIDs to KGIDs. @@ -335,7 +332,6 @@ func New(args Args) (*Loader, error) { // to createVFS in order to mount (among other things) procfs. if err = k.Init(kernel.InitKernelArgs{ FeatureSet: cpuid.HostFeatureSet(), - Timekeeper: tk, RootUserNamespace: creds.UserNamespace, RootNetworkNamespace: netns, ApplicationCores: uint(args.NumCPU), @@ -345,7 +341,7 @@ func New(args Args) (*Loader, error) { RootAbstractSocketNamespace: kernel.NewAbstractSocketNamespace(), PIDNamespace: kernel.NewRootPIDNamespace(creds.UserNamespace), }); err != nil { - return nil, fmt.Errorf("initializing kernel: %v", err) + return nil, fmt.Errorf("initializing kernel: %w", err) } if kernel.VFS2Enabled { @@ -374,17 +370,17 @@ func New(args Args) (*Loader, error) { procArgs, err := createProcessArgs(args.ID, args.Spec, creds, k, k.RootPIDNamespace()) if err != nil { - return nil, fmt.Errorf("creating init process for root container: %v", err) + return nil, fmt.Errorf("creating init process for root container: %w", err) } info.procArgs = procArgs if err := initCompatLogs(args.UserLogFD); err != nil { - return nil, fmt.Errorf("initializing compat logs: %v", err) + return nil, fmt.Errorf("initializing compat logs: %w", err) } mountHints, err := newPodMountHints(args.Spec) if err != nil { - return nil, fmt.Errorf("creating pod mount hints: %v", err) + return nil, fmt.Errorf("creating pod mount hints: %w", err) } info.conf = args.Conf @@ -394,12 +390,12 @@ func New(args Args) (*Loader, error) { // Set up host mount that will be used for imported fds. hostFilesystem, err := hostvfs2.NewFilesystem(k.VFS()) if err != nil { - return nil, fmt.Errorf("failed to create hostfs filesystem: %v", err) + return nil, fmt.Errorf("failed to create hostfs filesystem: %w", err) } defer hostFilesystem.DecRef(k.SupervisorContext()) hostMount, err := k.VFS().NewDisconnectedMount(hostFilesystem, nil, &vfs.MountOptions{}) if err != nil { - return nil, fmt.Errorf("failed to create hostfs mount: %v", err) + return nil, fmt.Errorf("failed to create hostfs mount: %w", err) } k.SetHostMount(hostMount) } @@ -417,7 +413,7 @@ func New(args Args) (*Loader, error) { // We don't care about child signals; some platforms can generate a // tremendous number of useless ones (I'm looking at you, ptrace). if err := sighandling.IgnoreChildStop(); err != nil { - return nil, fmt.Errorf("ignore child stop signals failed: %v", err) + return nil, fmt.Errorf("ignore child stop signals failed: %w", err) } // Create the control server using the provided FD. @@ -426,14 +422,14 @@ func New(args Args) (*Loader, error) { // controller is used to configure the kernel's network stack. ctrl, err := newController(args.ControllerFD, l) if err != nil { - return nil, fmt.Errorf("creating control server: %v", err) + return nil, fmt.Errorf("creating control server: %w", err) } l.ctrl = ctrl // Only start serving after Loader is set to controller and controller is set // to Loader, because they are both used in the urpc methods. if err := ctrl.srv.StartServing(); err != nil { - return nil, fmt.Errorf("starting control server: %v", err) + return nil, fmt.Errorf("starting control server: %w", err) } return l, nil @@ -444,7 +440,7 @@ func createProcessArgs(id string, spec *specs.Spec, creds *auth.Credentials, k * // Create initial limits. ls, err := createLimitSet(spec) if err != nil { - return kernel.CreateProcessArgs{}, fmt.Errorf("creating limits: %v", err) + return kernel.CreateProcessArgs{}, fmt.Errorf("creating limits: %w", err) } env, err := specutils.ResolveEnvs(spec.Process.Env) if err != nil { @@ -498,18 +494,18 @@ func (l *Loader) Destroy() { // In the success case, stdioFDs and goferFDs will only contain // released/closed FDs that ownership has been passed over to host FDs and // gofer sessions. Close them here in case of failure. - for _, fd := range l.root.stdioFDs { - _ = fd.Close() + for _, f := range l.root.stdioFDs { + _ = f.Close() } - for _, fd := range l.root.goferFDs { - _ = fd.Close() + for _, f := range l.root.goferFDs { + _ = f.Close() } } func createPlatform(conf *config.Config, deviceFile *os.File) (platform.Platform, error) { p, err := platform.Lookup(conf.Platform) if err != nil { - panic(fmt.Sprintf("invalid platform %v: %v", conf.Platform, err)) + panic(fmt.Sprintf("invalid platform %s: %s", conf.Platform, err)) } log.Infof("Platform: %s", conf.Platform) return p.New(deviceFile) @@ -519,7 +515,7 @@ func createMemoryFile() (*pgalloc.MemoryFile, error) { const memfileName = "runsc-memory" memfd, err := memutil.CreateMemFD(memfileName, 0) if err != nil { - return nil, fmt.Errorf("error creating memfd: %v", err) + return nil, fmt.Errorf("error creating memfd: %w", err) } memfile := os.NewFile(uintptr(memfd), memfileName) // We can't enable pgalloc.MemoryFileOpts.UseHostMemcgPressure even if @@ -527,8 +523,8 @@ func createMemoryFile() (*pgalloc.MemoryFile, error) { // in a mount namespace in which the relevant cgroupfs is not visible. mf, err := pgalloc.NewMemoryFile(memfile, pgalloc.MemoryFileOpts{}) if err != nil { - memfile.Close() - return nil, fmt.Errorf("error creating pgalloc.MemoryFile: %v", err) + _ = memfile.Close() + return nil, fmt.Errorf("error creating pgalloc.MemoryFile: %w", err) } return mf, nil } @@ -545,7 +541,7 @@ func (l *Loader) installSeccompFilters() error { ControllerFD: l.ctrl.srv.FD(), } if err := filter.Install(opts); err != nil { - return fmt.Errorf("installing seccomp filters: %v", err) + return fmt.Errorf("installing seccomp filters: %w", err) } } return nil @@ -571,8 +567,8 @@ func (l *Loader) run() error { // Delay host network configuration to this point because network namespace // is configured after the loader is created and before Run() is called. log.Debugf("Configuring host network") - stack := l.k.RootNetworkNamespace().Stack().(*hostinet.Stack) - if err := stack.Configure(); err != nil { + s := l.k.RootNetworkNamespace().Stack().(*hostinet.Stack) + if err := s.Configure(); err != nil { return err } } @@ -629,9 +625,9 @@ func (l *Loader) run() error { // be handled properly. deliveryMode = DeliverToForegroundProcessGroup } - log.Infof("Received external signal %d, mode: %v", sig, deliveryMode) + log.Infof("Received external signal %d, mode: %s", sig, deliveryMode) if err := l.signal(l.sandboxID, 0, int32(sig), deliveryMode); err != nil { - log.Warningf("error sending signal %v to container %q: %v", sig, l.sandboxID, err) + log.Warningf("error sending signal %s to container %q: %s", sig, l.sandboxID, err) } }) @@ -660,7 +656,7 @@ func (l *Loader) startContainer(spec *specs.Spec, conf *config.Config, cid strin // Create capabilities. caps, err := specutils.Capabilities(conf.EnableRaw, spec.Process.Capabilities) if err != nil { - return fmt.Errorf("creating capabilities: %v", err) + return fmt.Errorf("creating capabilities: %w", err) } l.mu.Lock() @@ -713,16 +709,16 @@ func (l *Loader) startContainer(spec *specs.Spec, conf *config.Config, cid strin } info.procArgs, err = createProcessArgs(cid, spec, creds, l.k, pidns) if err != nil { - return fmt.Errorf("creating new process: %v", err) + return fmt.Errorf("creating new process: %w", err) } // Use stdios or TTY depending on the spec configuration. if spec.Process.Terminal { - if len(stdioFDs) > 0 { - return fmt.Errorf("using TTY, stdios not expected: %v", stdioFDs) + if l := len(stdioFDs); l != 0 { + return fmt.Errorf("using TTY, stdios not expected: %d", l) } if ep.hostTTY == nil { - return fmt.Errorf("terminal enabled but no TTY provided. Did you set --console-socket on create?") + return fmt.Errorf("terminal enabled but no TTY provided (--console-socket possibly passed)") } info.stdioFDs = []*fd.FD{ep.hostTTY, ep.hostTTY, ep.hostTTY} ep.hostTTY = nil @@ -743,7 +739,7 @@ func (l *Loader) createContainerProcess(root bool, cid string, info *containerIn ctx := info.procArgs.NewContext(l.k) fdTable, ttyFile, ttyFileVFS2, err := createFDTable(ctx, info.spec.Process.Terminal, info.stdioFDs) if err != nil { - return nil, nil, nil, fmt.Errorf("importing fds: %v", err) + return nil, nil, nil, fmt.Errorf("importing fds: %w", err) } // CreateProcess takes a reference on fdTable if successful. We won't need // ours either way. @@ -780,7 +776,7 @@ func (l *Loader) createContainerProcess(root bool, cid string, info *containerIn // Create and start the new process. tg, _, err := l.k.CreateProcess(info.procArgs) if err != nil { - return nil, nil, nil, fmt.Errorf("creating process: %v", err) + return nil, nil, nil, fmt.Errorf("creating process: %w", err) } // CreateProcess takes a reference on FDTable if successful. info.procArgs.FDTable.DecRef(ctx) @@ -799,7 +795,7 @@ func (l *Loader) createContainerProcess(root bool, cid string, info *containerIn if info.spec.Linux != nil && info.spec.Linux.Seccomp != nil { program, err := seccomp.BuildProgram(info.spec.Linux.Seccomp) if err != nil { - return nil, nil, nil, fmt.Errorf("building seccomp program: %v", err) + return nil, nil, nil, fmt.Errorf("building seccomp program: %w", err) } if log.IsLogging(log.Debug) { @@ -810,7 +806,7 @@ func (l *Loader) createContainerProcess(root bool, cid string, info *containerIn task := tg.Leader() // NOTE: It seems Flags are ignored by runc so we ignore them too. if err := task.AppendSyscallFilter(program, true); err != nil { - return nil, nil, nil, fmt.Errorf("appending seccomp filters: %v", err) + return nil, nil, nil, fmt.Errorf("appending seccomp filters: %w", err) } } } else { @@ -841,7 +837,7 @@ func (l *Loader) startGoferMonitor(cid string, goferFDs []*fd.FD) { return uintptr(n), 0, err }) if err != nil { - panic(fmt.Sprintf("Error monitoring gofer FDs: %v", err)) + panic(fmt.Sprintf("Error monitoring gofer FDs: %s", err)) } l.mu.Lock() @@ -852,7 +848,7 @@ func (l *Loader) startGoferMonitor(cid string, goferFDs []*fd.FD) { if tg, _ := l.tryThreadGroupFromIDLocked(execID{cid: cid}); tg != nil { log.Infof("Gofer socket disconnected, killing container %q", cid) if err := l.signalAllProcesses(cid, int32(linux.SIGKILL)); err != nil { - log.Warningf("Error killing container %q after gofer stopped: %v", cid, err) + log.Warningf("Error killing container %q after gofer stopped: %s", cid, err) } } }() @@ -873,7 +869,7 @@ func (l *Loader) destroyContainer(cid string) error { // The container exists, but has it been started? if tg != nil { if err := l.signalAllProcesses(cid, int32(linux.SIGKILL)); err != nil { - return fmt.Errorf("sending SIGKILL to all container processes: %v", err) + return fmt.Errorf("sending SIGKILL to all container processes: %w", err) } // Wait for all processes that belong to the container to exit (including // exec'd processes). @@ -967,10 +963,15 @@ func (l *Loader) executeAsync(args *control.ExecArgs) (kernel.ThreadID, error) { } args.Envv = envv } + args.PIDNamespace = tg.PIDNamespace() + + args.Limits, err = createLimitSet(l.root.spec) + if err != nil { + return 0, fmt.Errorf("creating limits: %w", err) + } // Start the process. proc := control.Proc{Kernel: l.k} - args.PIDNamespace = tg.PIDNamespace() newTG, tgid, ttyFile, ttyFileVFS2, err := control.ExecAsync(&proc, args) if err != nil { return 0, err @@ -982,7 +983,7 @@ func (l *Loader) executeAsync(args *control.ExecArgs) (kernel.ThreadID, error) { tty: ttyFile, ttyVFS2: ttyFileVFS2, } - log.Debugf("updated processes: %v", l.processes) + log.Debugf("updated processes: %s", l.processes) return tgid, nil } @@ -993,7 +994,7 @@ func (l *Loader) waitContainer(cid string, waitStatus *uint32) error { // multiple clients to wait on the same container. tg, err := l.threadGroupFromID(execID{cid: cid}) if err != nil { - return fmt.Errorf("can't wait for container %q: %v", cid, err) + return fmt.Errorf("can't wait for container %q: %w", cid, err) } // If the thread either has already exited or exits during waiting, @@ -1007,7 +1008,7 @@ func (l *Loader) waitContainer(cid string, waitStatus *uint32) error { if l.root.procArgs.ContainerID == cid { // All sentry-created resources should have been released at this point. refsvfs2.DoLeakCheck() - coverage.Report() + _ = coverage.Report() } return nil } @@ -1026,7 +1027,7 @@ func (l *Loader) waitPID(tgid kernel.ThreadID, cid string, waitStatus *uint32) e l.mu.Lock() delete(l.processes, eid) - log.Debugf("updated processes (removal): %v", l.processes) + log.Debugf("updated processes (removal): %s", l.processes) l.mu.Unlock() return nil } @@ -1035,7 +1036,7 @@ func (l *Loader) waitPID(tgid kernel.ThreadID, cid string, waitStatus *uint32) e // In this case, find the process in the container's PID namespace. initTG, err := l.threadGroupFromID(execID{cid: cid}) if err != nil { - return fmt.Errorf("waiting for PID %d: %v", tgid, err) + return fmt.Errorf("waiting for PID %d: %w", tgid, err) } tg := initTG.PIDNamespace().ThreadGroupWithID(tgid) if tg == nil { @@ -1094,7 +1095,7 @@ func newRootNetworkNamespace(conf *config.Config, clock tcpip.Clock, uniqueID st return inet.NewRootNamespace(s, creator), nil default: - panic(fmt.Sprintf("invalid network configuration: %v", conf.Network)) + panic(fmt.Sprintf("invalid network configuration: %d", conf.Network)) } } @@ -1107,7 +1108,7 @@ func newEmptySandboxNetworkStack(clock tcpip.Clock, uniqueID stack.UniqueID) (in icmp.NewProtocol4, icmp.NewProtocol6, } - s := netstack.Stack{stack.New(stack.Options{ + s := netstack.Stack{Stack: stack.New(stack.Options{ NetworkProtocols: netProtos, TransportProtocols: transProtos, Clock: clock, @@ -1115,9 +1116,9 @@ func newEmptySandboxNetworkStack(clock tcpip.Clock, uniqueID stack.UniqueID) (in HandleLocal: true, // Enable raw sockets for users with sufficient // privileges. - RawFactory: raw.EndpointFactory{}, - UniqueID: uniqueID, - IPTables: netfilter.DefaultLinuxTables(), + RawFactory: raw.EndpointFactory{}, + UniqueID: uniqueID, + DefaultIPTables: netfilter.DefaultLinuxTables, })} // Enable SACK Recovery. @@ -1190,13 +1191,13 @@ func (l *Loader) signal(cid string, pid, signo int32, mode SignalDeliveryMode) e switch mode { case DeliverToProcess: if err := l.signalProcess(cid, kernel.ThreadID(pid), signo); err != nil { - return fmt.Errorf("signaling process in container %q PID %d: %v", cid, pid, err) + return fmt.Errorf("signaling process in container %q PID %d: %w", cid, pid, err) } return nil case DeliverToForegroundProcessGroup: if err := l.signalForegrondProcessGroup(cid, kernel.ThreadID(pid), signo); err != nil { - return fmt.Errorf("signaling foreground process group in container %q PID %d: %v", cid, pid, err) + return fmt.Errorf("signaling foreground process group in container %q PID %d: %w", cid, pid, err) } return nil @@ -1209,12 +1210,12 @@ func (l *Loader) signal(cid string, pid, signo int32, mode SignalDeliveryMode) e return err } if err := l.signalAllProcesses(cid, signo); err != nil { - return fmt.Errorf("signaling all processes in container %q: %v", cid, err) + return fmt.Errorf("signaling all processes in container %q: %w", cid, err) } return nil default: - panic(fmt.Sprintf("unknown signal delivery mode %v", mode)) + panic(fmt.Sprintf("unknown signal delivery mode %s", mode)) } } @@ -1224,7 +1225,7 @@ func (l *Loader) signalProcess(cid string, tgid kernel.ThreadID, signo int32) er execTG, err := l.threadGroupFromID(execID{cid: cid, pid: tgid}) if err == nil { // Send signal directly to the identified process. - return l.k.SendExternalSignalThreadGroup(execTG, &arch.SignalInfo{Signo: signo}) + return l.k.SendExternalSignalThreadGroup(execTG, &linux.SignalInfo{Signo: signo}) } // The caller may be signaling a process not started directly via exec. @@ -1237,7 +1238,7 @@ func (l *Loader) signalProcess(cid string, tgid kernel.ThreadID, signo int32) er if tg.Leader().ContainerID() != cid { return fmt.Errorf("process %d belongs to a different container: %q", tgid, tg.Leader().ContainerID()) } - return l.k.SendExternalSignalThreadGroup(tg, &arch.SignalInfo{Signo: signo}) + return l.k.SendExternalSignalThreadGroup(tg, &linux.SignalInfo{Signo: signo}) } // signalForegrondProcessGroup looks up foreground process group from the TTY @@ -1247,7 +1248,7 @@ func (l *Loader) signalForegrondProcessGroup(cid string, tgid kernel.ThreadID, s tg, err := l.tryThreadGroupFromIDLocked(execID{cid: cid, pid: tgid}) if err != nil { l.mu.Unlock() - return fmt.Errorf("no thread group found: %v", err) + return fmt.Errorf("no thread group found: %w", err) } if tg == nil { l.mu.Unlock() @@ -1257,7 +1258,7 @@ func (l *Loader) signalForegrondProcessGroup(cid string, tgid kernel.ThreadID, s tty, ttyVFS2, err := l.ttyFromIDLocked(execID{cid: cid, pid: tgid}) l.mu.Unlock() if err != nil { - return fmt.Errorf("no thread group found: %v", err) + return fmt.Errorf("no thread group found: %w", err) } var pg *kernel.ProcessGroup @@ -1273,7 +1274,7 @@ func (l *Loader) signalForegrondProcessGroup(cid string, tgid kernel.ThreadID, s // No foreground process group has been set. Signal the // original thread group. log.Warningf("No foreground process group for container %q and PID %d. Sending signal directly to PID %d.", cid, tgid, tgid) - return l.k.SendExternalSignalThreadGroup(tg, &arch.SignalInfo{Signo: signo}) + return l.k.SendExternalSignalThreadGroup(tg, &linux.SignalInfo{Signo: signo}) } // Send the signal to all processes in the process group. var lastErr error @@ -1281,7 +1282,7 @@ func (l *Loader) signalForegrondProcessGroup(cid string, tgid kernel.ThreadID, s if tg.ProcessGroup() != pg { continue } - if err := l.k.SendExternalSignalThreadGroup(tg, &arch.SignalInfo{Signo: signo}); err != nil { + if err := l.k.SendExternalSignalThreadGroup(tg, &linux.SignalInfo{Signo: signo}); err != nil { lastErr = err } } @@ -1296,7 +1297,7 @@ func (l *Loader) signalAllProcesses(cid string, signo int32) error { // sent to the entire container. l.k.Pause() defer l.k.Unpause() - return l.k.SendContainerSignal(cid, &arch.SignalInfo{Signo: signo}) + return l.k.SendContainerSignal(cid, &linux.SignalInfo{Signo: signo}) } // threadGroupFromID is similar to tryThreadGroupFromIDLocked except that it diff --git a/runsc/boot/vfs.go b/runsc/boot/vfs.go index c1828bd3d..52aa33529 100644 --- a/runsc/boot/vfs.go +++ b/runsc/boot/vfs.go @@ -210,12 +210,10 @@ func (c *containerMounter) createMountNamespaceVFS2(ctx context.Context, conf *c fd := c.fds.remove() data := p9MountData(fd, conf.FileAccess, true /* vfs2 */) - if conf.OverlayfsStaleRead { - // We can't check for overlayfs here because sandbox is chroot'ed and gofer - // can only send mount options for specs.Mounts (specs.Root is missing - // Options field). So assume root is always on top of overlayfs. - data = append(data, "overlayfs_stale_read") - } + // We can't check for overlayfs here because sandbox is chroot'ed and gofer + // can only send mount options for specs.Mounts (specs.Root is missing + // Options field). So assume root is always on top of overlayfs. + data = append(data, "overlayfs_stale_read") log.Infof("Mounting root over 9P, ioFD: %d", fd) opts := &vfs.MountOptions{ @@ -657,7 +655,6 @@ func (c *containerMounter) mountTmpVFS2(ctx context.Context, conf *config.Config Start: root, Path: fspath.Parse("/tmp"), } - // TODO(gvisor.dev/issue/2782): Use O_PATH when available. fd, err := c.k.VFS().OpenAt(ctx, creds, &pop, &vfs.OpenOptions{Flags: linux.O_RDONLY | linux.O_DIRECTORY}) switch err { case nil: diff --git a/runsc/cmd/gofer.go b/runsc/cmd/gofer.go index 6a755ecb6..5ded7b946 100644 --- a/runsc/cmd/gofer.go +++ b/runsc/cmd/gofer.go @@ -473,14 +473,12 @@ func adjustMountOptions(conf *config.Config, path string, opts []string) ([]stri rv := make([]string, len(opts)) copy(rv, opts) - if conf.OverlayfsStaleRead { - statfs := unix.Statfs_t{} - if err := unix.Statfs(path, &statfs); err != nil { - return nil, err - } - if statfs.Type == unix.OVERLAYFS_SUPER_MAGIC { - rv = append(rv, "overlayfs_stale_read") - } + statfs := unix.Statfs_t{} + if err := unix.Statfs(path, &statfs); err != nil { + return nil, err + } + if statfs.Type == unix.OVERLAYFS_SUPER_MAGIC { + rv = append(rv, "overlayfs_stale_read") } return rv, nil } diff --git a/runsc/config/config.go b/runsc/config/config.go index fa550ebf7..3d8c7a0ab 100644 --- a/runsc/config/config.go +++ b/runsc/config/config.go @@ -151,12 +151,6 @@ type Config struct { // ReferenceLeakMode sets reference leak check mode ReferenceLeak refs.LeakMode `flag:"ref-leak-mode"` - // OverlayfsStaleRead instructs the sandbox to assume that the root mount - // is on a Linux overlayfs mount, which does not necessarily preserve - // coherence between read-only and subsequent writable file descriptors - // representing the "same" file. - OverlayfsStaleRead bool `flag:"overlayfs-stale-read"` - // CPUNumFromQuota sets CPU number count to available CPU quota, using // least integer value greater than or equal to quota. // @@ -245,14 +239,14 @@ func (f *FileAccessType) Get() interface{} { } // String implements flag.Value. -func (f *FileAccessType) String() string { - switch *f { +func (f FileAccessType) String() string { + switch f { case FileAccessShared: return "shared" case FileAccessExclusive: return "exclusive" } - panic(fmt.Sprintf("Invalid file access type %v", *f)) + panic(fmt.Sprintf("Invalid file access type %d", f)) } // NetworkType tells which network stack to use. @@ -294,8 +288,8 @@ func (n *NetworkType) Get() interface{} { } // String implements flag.Value. -func (n *NetworkType) String() string { - switch *n { +func (n NetworkType) String() string { + switch n { case NetworkSandbox: return "sandbox" case NetworkHost: @@ -303,7 +297,7 @@ func (n *NetworkType) String() string { case NetworkNone: return "none" } - panic(fmt.Sprintf("Invalid network type %v", *n)) + panic(fmt.Sprintf("Invalid network type %d", n)) } // QueueingDiscipline is used to specify the kind of Queueing Discipline to @@ -341,14 +335,14 @@ func (q *QueueingDiscipline) Get() interface{} { } // String implements flag.Value. -func (q *QueueingDiscipline) String() string { - switch *q { +func (q QueueingDiscipline) String() string { + switch q { case QDiscNone: return "none" case QDiscFIFO: return "fifo" } - panic(fmt.Sprintf("Invalid qdisc %v", *q)) + panic(fmt.Sprintf("Invalid qdisc %d", q)) } func leakModePtr(v refs.LeakMode) *refs.LeakMode { diff --git a/runsc/config/flags.go b/runsc/config/flags.go index c3dca2352..6f1b5927a 100644 --- a/runsc/config/flags.go +++ b/runsc/config/flags.go @@ -72,7 +72,6 @@ func RegisterFlags() { flag.Var(fileAccessTypePtr(FileAccessShared), "file-access-mounts", "specifies which filesystem validation to use for volumes other than the root mount: shared (default), exclusive.") flag.Bool("overlay", false, "wrap filesystem mounts with writable overlay. All modifications are stored in memory inside the sandbox.") flag.Bool("verity", false, "specifies whether a verity file system will be mounted.") - flag.Bool("overlayfs-stale-read", true, "assume root mount is an overlay filesystem") flag.Bool("fsgofer-host-uds", false, "allow the gofer to mount Unix Domain Sockets.") flag.Bool("vfs2", false, "enables VFSv2. This uses the new VFS layer that is faster than the previous one.") flag.Bool("fuse", false, "TEST ONLY; use while FUSE in VFSv2 is landing. This allows the use of the new experimental FUSE filesystem.") diff --git a/runsc/container/container_test.go b/runsc/container/container_test.go index 0e79877b7..249324c5a 100644 --- a/runsc/container/container_test.go +++ b/runsc/container/container_test.go @@ -47,6 +47,62 @@ import ( "gvisor.dev/gvisor/runsc/specutils" ) +func TestMain(m *testing.M) { + log.SetLevel(log.Debug) + flag.Parse() + if err := testutil.ConfigureExePath(); err != nil { + panic(err.Error()) + } + specutils.MaybeRunAsRoot() + os.Exit(m.Run()) +} + +func execute(cont *Container, name string, arg ...string) (unix.WaitStatus, error) { + args := &control.ExecArgs{ + Filename: name, + Argv: append([]string{name}, arg...), + } + return cont.executeSync(args) +} + +func executeCombinedOutput(cont *Container, name string, arg ...string) ([]byte, error) { + r, w, err := os.Pipe() + if err != nil { + return nil, err + } + defer r.Close() + + args := &control.ExecArgs{ + Filename: name, + Argv: append([]string{name}, arg...), + FilePayload: urpc.FilePayload{Files: []*os.File{os.Stdin, w, w}}, + } + ws, err := cont.executeSync(args) + w.Close() + if err != nil { + return nil, err + } + if ws != 0 { + return nil, fmt.Errorf("exec failed, status: %v", ws) + } + + out, err := ioutil.ReadAll(r) + return out, err +} + +// executeSync synchronously executes a new process. +func (c *Container) executeSync(args *control.ExecArgs) (unix.WaitStatus, error) { + pid, err := c.Execute(args) + if err != nil { + return 0, fmt.Errorf("error executing: %v", err) + } + ws, err := c.WaitPID(pid) + if err != nil { + return 0, fmt.Errorf("error waiting: %v", err) + } + return ws, nil +} + // waitForProcessList waits for the given process list to show up in the container. func waitForProcessList(cont *Container, want []*control.Process) error { cb := func() error { @@ -2470,58 +2526,67 @@ func TestBindMountByOption(t *testing.T) { } } -func execute(cont *Container, name string, arg ...string) (unix.WaitStatus, error) { - args := &control.ExecArgs{ - Filename: name, - Argv: append([]string{name}, arg...), +// TestRlimits sets limit to number of open files and checks that the limit +// is propagated to the container. +func TestRlimits(t *testing.T) { + file, err := ioutil.TempFile(testutil.TmpDir(), "ulimit") + if err != nil { + t.Fatal(err) } - return cont.executeSync(args) -} + cmd := fmt.Sprintf("ulimit -n > %q", file.Name()) -func executeCombinedOutput(cont *Container, name string, arg ...string) ([]byte, error) { - r, w, err := os.Pipe() - if err != nil { - return nil, err + spec := testutil.NewSpecWithArgs("sh", "-c", cmd) + spec.Process.Rlimits = []specs.POSIXRlimit{ + {Type: "RLIMIT_NOFILE", Hard: 1000, Soft: 100}, } - defer r.Close() - args := &control.ExecArgs{ - Filename: name, - Argv: append([]string{name}, arg...), - FilePayload: urpc.FilePayload{Files: []*os.File{os.Stdin, w, w}}, + conf := testutil.TestConfig(t) + if err := run(spec, conf); err != nil { + t.Fatalf("Error running container: %v", err) } - ws, err := cont.executeSync(args) - w.Close() + got, err := ioutil.ReadFile(file.Name()) if err != nil { - return nil, err + t.Fatal(err) } - if ws != 0 { - return nil, fmt.Errorf("exec failed, status: %v", ws) + if want := "100\n"; string(got) != want { + t.Errorf("ulimit result, got: %q, want: %q", got, want) } - - out, err := ioutil.ReadAll(r) - return out, err } -// executeSync synchronously executes a new process. -func (c *Container) executeSync(args *control.ExecArgs) (unix.WaitStatus, error) { - pid, err := c.Execute(args) +// TestRlimitsExec sets limit to number of open files and checks that the limit +// is propagated to exec'd processes. +func TestRlimitsExec(t *testing.T) { + spec := testutil.NewSpecWithArgs("sleep", "100") + spec.Process.Rlimits = []specs.POSIXRlimit{ + {Type: "RLIMIT_NOFILE", Hard: 1000, Soft: 100}, + } + + conf := testutil.TestConfig(t) + _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) if err != nil { - return 0, fmt.Errorf("error executing: %v", err) + t.Fatalf("error setting up container: %v", err) } - ws, err := c.WaitPID(pid) + defer cleanup() + + args := Args{ + ID: testutil.RandomContainerID(), + Spec: spec, + BundleDir: bundleDir, + } + cont, err := New(conf, args) if err != nil { - return 0, fmt.Errorf("error waiting: %v", err) + t.Fatalf("error creating container: %v", err) + } + defer cont.Destroy() + if err := cont.Start(conf); err != nil { + t.Fatalf("error starting container: %v", err) } - return ws, nil -} -func TestMain(m *testing.M) { - log.SetLevel(log.Debug) - flag.Parse() - if err := testutil.ConfigureExePath(); err != nil { - panic(err.Error()) + got, err := executeCombinedOutput(cont, "/bin/sh", "-c", "ulimit -n") + if err != nil { + t.Fatal(err) + } + if want := "100\n"; string(got) != want { + t.Errorf("ulimit result, got: %q, want: %q", got, want) } - specutils.MaybeRunAsRoot() - os.Exit(m.Run()) } diff --git a/runsc/sandbox/sandbox.go b/runsc/sandbox/sandbox.go index 8d31e33b2..29e202b7d 100644 --- a/runsc/sandbox/sandbox.go +++ b/runsc/sandbox/sandbox.go @@ -131,8 +131,9 @@ func New(conf *config.Config, args *Args) (*Sandbox, error) { // The Cleanup object cleans up partially created sandboxes when an error // occurs. Any errors occurring during cleanup itself are ignored. c := cleanup.Make(func() { - err := s.destroy() - log.Warningf("error destroying sandbox: %v", err) + if err := s.destroy(); err != nil { + log.Warningf("error destroying sandbox: %v", err) + } }) defer c.Clean() diff --git a/runsc/specutils/specutils.go b/runsc/specutils/specutils.go index 11b476690..c228d6299 100644 --- a/runsc/specutils/specutils.go +++ b/runsc/specutils/specutils.go @@ -246,7 +246,7 @@ func Capabilities(enableRaw bool, specCaps *specs.LinuxCapabilities) (*auth.Task if caps.PermittedCaps, err = capsFromNames(specCaps.Permitted, skipSet); err != nil { return nil, err } - // TODO(nlacasse): Support ambient capabilities. + // TODO(gvisor.dev/issue/3166): Support ambient capabilities. } return &caps, nil } diff --git a/test/benchmarks/database/redis_test.go b/test/benchmarks/database/redis_test.go index f3c4522ac..7497f69b3 100644 --- a/test/benchmarks/database/redis_test.go +++ b/test/benchmarks/database/redis_test.go @@ -1,6 +1,6 @@ -// Copyright 2020 The gVisor Authors. +// Copyright 2021 The gVisor Authors. // -// Licensed under the Apache License, Version 2.0 (the "License"); +// Licensed under the Apache License, Version 3.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // @@ -17,6 +17,7 @@ package database import ( "context" "os" + "strings" "testing" "time" @@ -65,6 +66,34 @@ func BenchmarkRedis(b *testing.B) { // Redis runs on port 6379 by default. port := 6379 ctx := context.Background() + server := serverMachine.GetContainer(ctx, b) + defer server.CleanUp(ctx) + + // The redis docker container takes no arguments to run a redis server. + if err := server.Spawn(ctx, dockerutil.RunOpts{ + Image: "benchmarks/redis", + Ports: []int{port}, + }); err != nil { + b.Fatalf("failed to start redis server with: %v", err) + } + + if out, err := server.WaitForOutput(ctx, "Ready to accept connections", 3*time.Second); err != nil { + b.Fatalf("failed to start redis server: %v %s", err, out) + } + + ip, err := serverMachine.IPAddress() + if err != nil { + b.Fatalf("failed to get IP from server: %v", err) + } + + serverPort, err := server.FindPort(ctx, port) + if err != nil { + b.Fatalf("failed to get IP from server: %v", err) + } + + if err = harness.WaitUntilServing(ctx, clientMachine, ip, serverPort); err != nil { + b.Fatalf("failed to start redis with: %v", err) + } for _, operation := range operations { param := tools.Parameter{ Name: "operation", @@ -74,49 +103,30 @@ func BenchmarkRedis(b *testing.B) { if err != nil { b.Fatalf("Failed to parse paramaters: %v", err) } - b.Run(name, func(b *testing.B) { - server := serverMachine.GetContainer(ctx, b) - defer server.CleanUp(ctx) - - // The redis docker container takes no arguments to run a redis server. - if err := server.Spawn(ctx, dockerutil.RunOpts{ - Image: "benchmarks/redis", - Ports: []int{port}, - }); err != nil { - b.Fatalf("failed to start redis server with: %v", err) - } - if out, err := server.WaitForOutput(ctx, "Ready to accept connections", 3*time.Second); err != nil { - b.Fatalf("failed to start redis server: %v %s", err, out) + b.Run(name, func(b *testing.B) { + redis := tools.Redis{ + Operation: operation, } - ip, err := serverMachine.IPAddress() - if err != nil { - b.Fatalf("failed to get IP from server: %v", err) - } + // Sometimes, the connection between the redis client and server can be + // flaky such that the client returns infinity as the QPS measurement for + // a give operation. If this happens, retry the client up to 3 times. + out := "inf" + for retries := 0; strings.Contains(out, "inf") && retries < 3; retries++ { + b.ResetTimer() + client := clientMachine.GetNativeContainer(ctx, b) + defer client.CleanUp(ctx) - serverPort, err := server.FindPort(ctx, port) - if err != nil { - b.Fatalf("failed to get IP from server: %v", err) + out, err = client.Run(ctx, dockerutil.RunOpts{ + Image: "benchmarks/redis", + }, redis.MakeCmd(ip, serverPort, b.N /*requests*/)...) } - if err = harness.WaitUntilServing(ctx, clientMachine, ip, serverPort); err != nil { - b.Fatalf("failed to start redis with: %v", err) - } - - client := clientMachine.GetNativeContainer(ctx, b) - defer client.CleanUp(ctx) - - redis := tools.Redis{ - Operation: operation, - } - b.ResetTimer() - out, err := client.Run(ctx, dockerutil.RunOpts{ - Image: "benchmarks/redis", - }, redis.MakeCmd(ip, serverPort, b.N /*requests*/)...) if err != nil { b.Fatalf("redis-benchmark failed with: %v", err) } + b.StopTimer() redis.Report(b, out) }) diff --git a/test/cmd/test_app/BUILD b/test/cmd/test_app/BUILD index 98ba5a3d9..7b8b23b4d 100644 --- a/test/cmd/test_app/BUILD +++ b/test/cmd/test_app/BUILD @@ -7,7 +7,7 @@ go_binary( testonly = 1, srcs = [ "fds.go", - "test_app.go", + "main.go", ], pure = True, visibility = ["//runsc/container:__pkg__"], diff --git a/test/cmd/test_app/test_app.go b/test/cmd/test_app/main.go index 3ba4f38f8..2d08ce2db 100644 --- a/test/cmd/test_app/test_app.go +++ b/test/cmd/test_app/main.go @@ -160,14 +160,17 @@ func (c *taskTree) SetFlags(f *flag.FlagSet) { // Execute implements subcommands.Command. func (c *taskTree) Execute(ctx context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { - stop := testutil.StartReaper() - defer stop() - if c.depth == 0 { log.Printf("Child sleeping, PID: %d\n", os.Getpid()) - select {} + for { + time.Sleep(time.Hour) + } } - log.Printf("Parent %d sleeping, PID: %d\n", c.depth, os.Getpid()) + + log.Printf("Parent %d creating %d children, PID: %d\n", c.depth, c.width, os.Getpid()) + + stop := testutil.StartReaper() + defer stop() var cmds []*exec.Cmd for i := 0; i < c.width; i++ { @@ -175,7 +178,7 @@ func (c *taskTree) Execute(ctx context.Context, f *flag.FlagSet, args ...interfa "/proc/self/exe", c.Name(), "--depth", strconv.Itoa(c.depth-1), "--width", strconv.Itoa(c.width), - "--pause", strconv.FormatBool(c.pause)) + fmt.Sprintf("--pause=%t", c.pause)) cmd.Stdout = os.Stdout cmd.Stderr = os.Stderr @@ -190,7 +193,10 @@ func (c *taskTree) Execute(ctx context.Context, f *flag.FlagSet, args ...interfa } if c.pause { - select {} + log.Printf("Parent %d sleeping, PID: %d\n", c.depth, os.Getpid()) + for { + time.Sleep(time.Hour) + } } return subcommands.ExitSuccess diff --git a/test/fuse/BUILD b/test/fuse/BUILD index 74500ec84..2885ffdb2 100644 --- a/test/fuse/BUILD +++ b/test/fuse/BUILD @@ -2,75 +2,77 @@ load("//test/runner:defs.bzl", "syscall_test") package(licenses = ["notice"]) -syscall_test( - fuse = "True", - test = "//test/fuse/linux:stat_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:open_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:release_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:mknod_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:symlink_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:readlink_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:mkdir_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:read_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:write_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:rmdir_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:readdir_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:create_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:unlink_test", -) - -syscall_test( - fuse = "True", - test = "//test/fuse/linux:setstat_test", -) +# FIXME(b/190750110) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:stat_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:open_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:release_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:mknod_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:symlink_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:readlink_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:mkdir_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:read_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:write_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:rmdir_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:readdir_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:create_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:unlink_test", +# ) +# +# syscall_test( +# fuse = "True", +# test = "//test/fuse/linux:setstat_test", +# ) syscall_test( fuse = "True", diff --git a/test/packetimpact/runner/defs.bzl b/test/packetimpact/runner/defs.bzl index afe73a69a..19f6cc0e0 100644 --- a/test/packetimpact/runner/defs.bzl +++ b/test/packetimpact/runner/defs.bzl @@ -115,7 +115,7 @@ def packetimpact_netstack_test( **kwargs ) -def packetimpact_go_test(name, expect_native_failure = False, expect_netstack_failure = False, num_duts = 1): +def packetimpact_go_test(name, expect_native_failure = False, expect_netstack_failure = False, num_duts = 1, **kwargs): """Add packetimpact tests written in go. Args: @@ -123,6 +123,7 @@ def packetimpact_go_test(name, expect_native_failure = False, expect_netstack_fa expect_native_failure: the test must fail natively expect_netstack_failure: the test must fail for Netstack num_duts: how many DUTs are needed for the test + **kwargs: all the other args, forwarded to packetimpact_native_test and packetimpact_netstack_test """ testbench_binary = name + "_test" packetimpact_native_test( @@ -130,12 +131,14 @@ def packetimpact_go_test(name, expect_native_failure = False, expect_netstack_fa expect_failure = expect_native_failure, num_duts = num_duts, testbench_binary = testbench_binary, + **kwargs ) packetimpact_netstack_test( name = name, expect_failure = expect_netstack_failure, num_duts = num_duts, testbench_binary = testbench_binary, + **kwargs ) def packetimpact_testbench(name, size = "small", pure = True, **kwargs): @@ -163,6 +166,7 @@ PacketimpactTestInfo = provider( doc = "Provide information for packetimpact tests", fields = [ "name", + "timeout", "expect_netstack_failure", "num_duts", ], @@ -271,9 +275,6 @@ ALL_TESTS = [ num_duts = 3, ), PacketimpactTestInfo( - name = "udp_send_recv_dgram", - ), - PacketimpactTestInfo( name = "tcp_linger", ), PacketimpactTestInfo( @@ -289,6 +290,10 @@ ALL_TESTS = [ PacketimpactTestInfo( name = "tcp_fin_retransmission", ), + PacketimpactTestInfo( + name = "generic_dgram_socket_send_recv", + timeout = "long", + ), ] def validate_all_tests(): diff --git a/test/packetimpact/runner/dut.go b/test/packetimpact/runner/dut.go index 4fb2f5c4b..02678a76a 100644 --- a/test/packetimpact/runner/dut.go +++ b/test/packetimpact/runner/dut.go @@ -363,6 +363,9 @@ func TestWithDUT(ctx context.Context, t *testing.T, mkDevice func(*dockerutil.Co // and receives packets and also sends POSIX socket commands to the // posix_server to be executed on the DUT. testArgs := []string{containerTestbenchBinary} + if testing.Verbose() { + testArgs = append(testArgs, "-test.v") + } testArgs = append(testArgs, extraTestArgs...) testArgs = append(testArgs, fmt.Sprintf("--native=%t", native), @@ -395,6 +398,8 @@ func TestWithDUT(ctx context.Context, t *testing.T, mkDevice func(*dockerutil.Co } else if expectFailure { t.Logf(`test failed as expected: %v %s`, err, testLogs) + } else if testing.Verbose() { + t.Log(testLogs) } } diff --git a/test/packetimpact/testbench/BUILD b/test/packetimpact/testbench/BUILD index 616215dc3..d8059ab98 100644 --- a/test/packetimpact/testbench/BUILD +++ b/test/packetimpact/testbench/BUILD @@ -16,6 +16,8 @@ go_library( ], visibility = ["//test/packetimpact:__subpackages__"], deps = [ + "//pkg/abi/linux", + "//pkg/binary", "//pkg/hostarch", "//pkg/tcpip", "//pkg/tcpip/buffer", diff --git a/test/packetimpact/testbench/connections.go b/test/packetimpact/testbench/connections.go index 8ad9040ff..ed56f9ac7 100644 --- a/test/packetimpact/testbench/connections.go +++ b/test/packetimpact/testbench/connections.go @@ -594,32 +594,50 @@ func (conn *Connection) Expect(t *testing.T, layer Layer, timeout time.Duration) func (conn *Connection) ExpectFrame(t *testing.T, layers Layers, timeout time.Duration) (Layers, error) { t.Helper() - deadline := time.Now().Add(timeout) + frames, ok := conn.ListenForFrame(t, layers, timeout) + if ok { + return frames[len(frames)-1], nil + } + if len(frames) == 0 { + return nil, fmt.Errorf("got no frames matching %s during %s", layers, timeout) + } + var errs error + for _, got := range frames { + want := conn.incoming(layers) + if err := want.merge(layers); err != nil { + errs = multierr.Combine(errs, err) + } else { + errs = multierr.Combine(errs, &layersError{got: got, want: want}) + } + } + return nil, fmt.Errorf("got frames:\n%w want %s during %s", errs, layers, timeout) +} + +// ListenForFrame captures all frames until a frame matches the provided Layers, +// or until the timeout specified. Returns all captured frames, including the +// matched frame, and true if the desired frame was found. +func (conn *Connection) ListenForFrame(t *testing.T, layers Layers, timeout time.Duration) ([]Layers, bool) { + t.Helper() + + deadline := time.Now().Add(timeout) + var frames []Layers for { - var gotLayers Layers + var got Layers if timeout := time.Until(deadline); timeout > 0 { - gotLayers = conn.recvFrame(t, timeout) + got = conn.recvFrame(t, timeout) } - if gotLayers == nil { - if errs == nil { - return nil, fmt.Errorf("got no frames matching %s during %s", layers, timeout) - } - return nil, fmt.Errorf("got frames:\n%w want %s during %s", errs, layers, timeout) + if got == nil { + return frames, false } - if conn.match(layers, gotLayers) { + frames = append(frames, got) + if conn.match(layers, got) { for i, s := range conn.layerStates { - if err := s.received(gotLayers[i]); err != nil { + if err := s.received(got[i]); err != nil { t.Fatalf("failed to update test connection's layer states based on received frame: %s", err) } } - return gotLayers, nil - } - want := conn.incoming(layers) - if err := want.merge(layers); err != nil { - errs = multierr.Combine(errs, err) - } else { - errs = multierr.Combine(errs, &layersError{got: gotLayers, want: want}) + return frames, true } } } @@ -1025,6 +1043,8 @@ func (conn *UDPIPv4) SendIP(t *testing.T, ip IPv4, udp UDP, additionalLayers ... // SendFrame sends a frame on the wire and updates the state of all layers. func (conn *UDPIPv4) SendFrame(t *testing.T, overrideLayers Layers, additionalLayers ...Layer) { + t.Helper() + conn.send(t, overrideLayers, additionalLayers...) } diff --git a/test/packetimpact/testbench/dut.go b/test/packetimpact/testbench/dut.go index eabdc8cb3..0cac0bf1b 100644 --- a/test/packetimpact/testbench/dut.go +++ b/test/packetimpact/testbench/dut.go @@ -22,11 +22,13 @@ import ( "testing" "time" - pb "gvisor.dev/gvisor/test/packetimpact/proto/posix_server_go_proto" - "golang.org/x/sys/unix" "google.golang.org/grpc" "google.golang.org/grpc/keepalive" + "gvisor.dev/gvisor/pkg/abi/linux" + bin "gvisor.dev/gvisor/pkg/binary" + "gvisor.dev/gvisor/pkg/hostarch" + pb "gvisor.dev/gvisor/test/packetimpact/proto/posix_server_go_proto" ) // DUT communicates with the DUT to force it to make POSIX calls. @@ -428,6 +430,33 @@ func (dut *DUT) GetSockOptTimevalWithErrno(ctx context.Context, t *testing.T, so return ret, timeval, errno } +// GetSockOptTCPInfo retreives TCPInfo for the given socket descriptor. +func (dut *DUT) GetSockOptTCPInfo(t *testing.T, sockfd int32) linux.TCPInfo { + t.Helper() + + ctx, cancel := context.WithTimeout(context.Background(), RPCTimeout) + defer cancel() + ret, info, err := dut.GetSockOptTCPInfoWithErrno(ctx, t, sockfd) + if ret != 0 || err != unix.Errno(0) { + t.Fatalf("failed to GetSockOptTCPInfo: %s", err) + } + return info +} + +// GetSockOptTCPInfoWithErrno retreives TCPInfo with any errno. +func (dut *DUT) GetSockOptTCPInfoWithErrno(ctx context.Context, t *testing.T, sockfd int32) (int32, linux.TCPInfo, error) { + t.Helper() + + info := linux.TCPInfo{} + ret, infoBytes, errno := dut.GetSockOptWithErrno(ctx, t, sockfd, unix.SOL_TCP, unix.TCP_INFO, int32(linux.SizeOfTCPInfo)) + if got, want := len(infoBytes), linux.SizeOfTCPInfo; got != want { + t.Fatalf("expected %T, got %d bytes want %d bytes", info, got, want) + } + bin.Unmarshal(infoBytes, hostarch.ByteOrder, &info) + + return ret, info, errno +} + // Listen calls listen on the DUT and causes a fatal test failure if it doesn't // succeed. If more control over the timeout or error handling is needed, use // ListenWithErrno. @@ -469,8 +498,8 @@ func (dut *DUT) PollOne(t *testing.T, fd int32, events int16, timeout time.Durat if readyFd := pfds[0].Fd; readyFd != fd { t.Fatalf("Poll returned an fd %d that was not requested (%d)", readyFd, fd) } - if got, want := pfds[0].Revents, int16(events); got&want == 0 { - t.Fatalf("Poll returned no events in our interest, got: %#b, want: %#b", got, want) + if got, want := pfds[0].Revents, int16(events); got&want != want { + t.Fatalf("Poll returned events does not include all of the interested events, got: %#b, want: %#b", got, want) } } diff --git a/test/packetimpact/testbench/layers.go b/test/packetimpact/testbench/layers.go index 2311f7686..2644b3248 100644 --- a/test/packetimpact/testbench/layers.go +++ b/test/packetimpact/testbench/layers.go @@ -357,7 +357,7 @@ func (l *IPv4) ToBytes() ([]byte, error) { case *ICMPv4: fields.Protocol = uint8(header.ICMPv4ProtocolNumber) default: - // TODO(b/150301488): Support more protocols as needed. + // We can add support for more protocols as needed. return nil, fmt.Errorf("ipv4 header's next layer is unrecognized: %#v", n) } } @@ -824,6 +824,8 @@ type ICMPv6 struct { Type *header.ICMPv6Type Code *header.ICMPv6Code Checksum *uint16 + Ident *uint16 // Only in Echo Request/Reply. + Pointer *uint32 // Only in Parameter Problem. Payload []byte } @@ -835,7 +837,7 @@ func (l *ICMPv6) String() string { // ToBytes implements Layer.ToBytes. func (l *ICMPv6) ToBytes() ([]byte, error) { - b := make([]byte, header.ICMPv6HeaderSize+len(l.Payload)) + b := make([]byte, header.ICMPv6MinimumSize+len(l.Payload)) h := header.ICMPv6(b) if l.Type != nil { h.SetType(*l.Type) @@ -843,27 +845,34 @@ func (l *ICMPv6) ToBytes() ([]byte, error) { if l.Code != nil { h.SetCode(*l.Code) } - if n := copy(h.MessageBody(), l.Payload); n != len(l.Payload) { + if n := copy(h.Payload(), l.Payload); n != len(l.Payload) { panic(fmt.Sprintf("copied %d bytes, expected to copy %d bytes", n, len(l.Payload))) } + typ := h.Type() + switch typ { + case header.ICMPv6EchoRequest, header.ICMPv6EchoReply: + if l.Ident != nil { + h.SetIdent(*l.Ident) + } + case header.ICMPv6ParamProblem: + if l.Pointer != nil { + h.SetTypeSpecific(*l.Pointer) + } + } if l.Checksum != nil { h.SetChecksum(*l.Checksum) } else { // It is possible that the ICMPv6 header does not follow the IPv6 header // immediately, there could be one or more extension headers in between. - // We need to search forward to find the IPv6 header. - for prev := l.Prev(); prev != nil; prev = prev.Prev() { - if ipv6, ok := prev.(*IPv6); ok { - payload, err := payload(l) - if err != nil { - return nil, err - } + // We need to search backwards to find the IPv6 header. + for layer := l.Prev(); layer != nil; layer = layer.Prev() { + if ipv6, ok := layer.(*IPv6); ok { h.SetChecksum(header.ICMPv6Checksum(header.ICMPv6ChecksumParams{ - Header: h, + Header: h[:header.ICMPv6PayloadOffset], Src: *ipv6.SrcAddr, Dst: *ipv6.DstAddr, - PayloadCsum: header.ChecksumVV(payload, 0 /* initial */), - PayloadLen: payload.Size(), + PayloadCsum: header.Checksum(l.Payload, 0 /* initial */), + PayloadLen: len(l.Payload), })) break } @@ -884,20 +893,21 @@ func ICMPv6Code(v header.ICMPv6Code) *header.ICMPv6Code { return &v } -// Byte is a helper routine that allocates a new byte value to store -// v and returns a pointer to it. -func Byte(v byte) *byte { - return &v -} - // parseICMPv6 parses the bytes assuming that they start with an ICMPv6 header. func parseICMPv6(b []byte) (Layer, layerParser) { h := header.ICMPv6(b) + msgType := h.Type() icmpv6 := ICMPv6{ - Type: ICMPv6Type(h.Type()), + Type: ICMPv6Type(msgType), Code: ICMPv6Code(h.Code()), Checksum: Uint16(h.Checksum()), - Payload: h.MessageBody(), + Payload: h.Payload(), + } + switch msgType { + case header.ICMPv6EchoRequest, header.ICMPv6EchoReply: + icmpv6.Ident = Uint16(h.Ident()) + case header.ICMPv6ParamProblem: + icmpv6.Pointer = Uint32(h.TypeSpecific()) } return &icmpv6, nil } @@ -907,7 +917,7 @@ func (l *ICMPv6) match(other Layer) bool { } func (l *ICMPv6) length() int { - return header.ICMPv6HeaderSize + len(l.Payload) + return header.ICMPv6MinimumSize + len(l.Payload) } // merge overrides the values in l with the values from other but only in fields @@ -954,8 +964,8 @@ func (l *ICMPv4) ToBytes() ([]byte, error) { if l.Code != nil { h.SetCode(*l.Code) } - if copied := copy(h.Payload(), l.Payload); copied != len(l.Payload) { - panic(fmt.Sprintf("wrong number of bytes copied into h.Payload(): got = %d, want = %d", len(h.Payload()), len(l.Payload))) + if n := copy(h.Payload(), l.Payload); n != len(l.Payload) { + panic(fmt.Sprintf("wrong number of bytes copied into h.Payload(): got = %d, want = %d", n, len(l.Payload))) } typ := h.Type() switch typ { @@ -977,16 +987,7 @@ func (l *ICMPv4) ToBytes() ([]byte, error) { if l.Checksum != nil { h.SetChecksum(*l.Checksum) } else { - // Compute the checksum based on the ICMPv4.Payload and also the subsequent - // layers. - payload, err := payload(l) - if err != nil { - return nil, err - } - var vv buffer.VectorisedView - vv.AppendView(buffer.View(l.Payload)) - vv.Append(payload) - h.SetChecksum(header.ICMPv4Checksum(h, header.ChecksumVV(vv, 0 /* initial */))) + h.SetChecksum(^header.Checksum(h, 0)) } return h, nil @@ -1019,7 +1020,7 @@ func (l *ICMPv4) match(other Layer) bool { } func (l *ICMPv4) length() int { - return header.ICMPv4MinimumSize + return header.ICMPv4MinimumSize + len(l.Payload) } // merge overrides the values in l with the values from other but only in fields diff --git a/test/packetimpact/testbench/layers_test.go b/test/packetimpact/testbench/layers_test.go index 614a5de1e..bc96e0c88 100644 --- a/test/packetimpact/testbench/layers_test.go +++ b/test/packetimpact/testbench/layers_test.go @@ -596,7 +596,7 @@ func TestIPv6ExtHdrOptions(t *testing.T) { Type: ICMPv6Type(header.ICMPv6ParamProblem), Code: ICMPv6Code(header.ICMPv6ErroneousHeader), Checksum: Uint16(0x5f98), - Payload: []byte{0x00, 0x00, 0x00, 0x06}, + Pointer: Uint32(6), }, }, }, diff --git a/test/packetimpact/testbench/rawsockets.go b/test/packetimpact/testbench/rawsockets.go index feeb0888a..6d95c033d 100644 --- a/test/packetimpact/testbench/rawsockets.go +++ b/test/packetimpact/testbench/rawsockets.go @@ -17,7 +17,6 @@ package testbench import ( "encoding/binary" "fmt" - "math" "net" "testing" "time" @@ -81,19 +80,20 @@ func (s *Sniffer) Recv(t *testing.T, timeout time.Duration) []byte { deadline := time.Now().Add(timeout) for { - timeout = deadline.Sub(time.Now()) + timeout = time.Until(deadline) if timeout <= 0 { return nil } - whole, frac := math.Modf(timeout.Seconds()) - tv := unix.Timeval{ - Sec: int64(whole), - Usec: int64(frac * float64(time.Second/time.Microsecond)), + usec := timeout.Microseconds() + if usec == 0 { + // Timeout is less than a microsecond; set usec to 1 to avoid + // blocking indefinitely. + usec = 1 } - // The following should never happen, but having this guard here is better - // than blocking indefinitely in the future. - if tv.Sec == 0 && tv.Usec == 0 { - t.Fatal("setting SO_RCVTIMEO to 0 means blocking indefinitely") + const microsInOne = 1e6 + tv := unix.Timeval{ + Sec: usec / microsInOne, + Usec: usec % microsInOne, } if err := unix.SetsockoptTimeval(s.fd, unix.SOL_SOCKET, unix.SO_RCVTIMEO, &tv); err != nil { t.Fatalf("can't setsockopt SO_RCVTIMEO: %s", err) diff --git a/test/packetimpact/testbench/testbench.go b/test/packetimpact/testbench/testbench.go index 37d02365a..caa389780 100644 --- a/test/packetimpact/testbench/testbench.go +++ b/test/packetimpact/testbench/testbench.go @@ -57,11 +57,21 @@ type DUTUname struct { OperatingSystem string } -// IsLinux returns true if we are running natively on Linux. +// IsLinux returns true if the DUT is running Linux. func (n *DUTUname) IsLinux() bool { return Native && n.OperatingSystem == "GNU/Linux" } +// IsGvisor returns true if the DUT is running gVisor. +func (*DUTUname) IsGvisor() bool { + return !Native +} + +// IsFuchsia returns true if the DUT is running Fuchsia. +func (n *DUTUname) IsFuchsia() bool { + return Native && n.OperatingSystem == "Fuchsia" +} + // DUTTestNet describes the test network setup on dut and how the testbench // should connect with an existing DUT. type DUTTestNet struct { @@ -99,6 +109,16 @@ type DUTTestNet struct { POSIXServerPort uint16 } +// SubnetBroadcast returns the test network's subnet broadcast address. +func (n *DUTTestNet) SubnetBroadcast() net.IP { + addr := append([]byte(nil), n.RemoteIPv4...) + mask := net.CIDRMask(n.IPv4PrefixLength, net.IPv4len*8) + for i := range addr { + addr[i] |= ^mask[i] + } + return addr +} + // registerFlags defines flags and associates them with the package-level // exported variables above. It should be called by tests in their init // functions. @@ -112,6 +132,7 @@ func registerFlags(fs *flag.FlagSet) { // Initialize initializes the testbench, it parse the flags and sets up the // pool of test networks for testbench's later use. func Initialize(fs *flag.FlagSet) { + testing.Init() registerFlags(fs) flag.Parse() if err := loadDUTInfos(); err != nil { diff --git a/test/packetimpact/tests/BUILD b/test/packetimpact/tests/BUILD index c4fe293e0..4cff0cf4c 100644 --- a/test/packetimpact/tests/BUILD +++ b/test/packetimpact/tests/BUILD @@ -104,8 +104,6 @@ packetimpact_testbench( srcs = ["tcp_retransmits_test.go"], deps = [ "//pkg/abi/linux", - "//pkg/binary", - "//pkg/hostarch", "//pkg/tcpip/header", "//test/packetimpact/testbench", "@org_golang_x_sys//unix:go_default_library", @@ -189,6 +187,7 @@ packetimpact_testbench( name = "tcp_synsent_reset", srcs = ["tcp_synsent_reset_test.go"], deps = [ + "//pkg/abi/linux", "//pkg/tcpip/header", "//test/packetimpact/testbench", "@org_golang_x_sys//unix:go_default_library", @@ -307,18 +306,6 @@ packetimpact_testbench( ) packetimpact_testbench( - name = "udp_send_recv_dgram", - srcs = ["udp_send_recv_dgram_test.go"], - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@com_github_google_go_cmp//cmp:go_default_library", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_testbench( name = "tcp_linger", srcs = ["tcp_linger_test.go"], deps = [ @@ -353,8 +340,6 @@ packetimpact_testbench( srcs = ["tcp_rack_test.go"], deps = [ "//pkg/abi/linux", - "//pkg/binary", - "//pkg/hostarch", "//pkg/tcpip/header", "//pkg/tcpip/seqnum", "//test/packetimpact/testbench", @@ -367,8 +352,6 @@ packetimpact_testbench( srcs = ["tcp_info_test.go"], deps = [ "//pkg/abi/linux", - "//pkg/binary", - "//pkg/hostarch", "//pkg/tcpip/header", "//test/packetimpact/testbench", "@org_golang_x_sys//unix:go_default_library", @@ -401,6 +384,7 @@ packetimpact_testbench( deps = [ "//pkg/tcpip/header", "//test/packetimpact/testbench", + "@com_github_google_go_cmp//cmp:go_default_library", "@org_golang_x_sys//unix:go_default_library", ], ) @@ -415,10 +399,23 @@ packetimpact_testbench( ], ) +packetimpact_testbench( + name = "generic_dgram_socket_send_recv", + srcs = ["generic_dgram_socket_send_recv_test.go"], + deps = [ + "//pkg/tcpip", + "//pkg/tcpip/header", + "//test/packetimpact/testbench", + "@com_github_google_go_cmp//cmp:go_default_library", + "@org_golang_x_sys//unix:go_default_library", + ], +) + validate_all_tests() [packetimpact_go_test( name = t.name, + timeout = t.timeout if hasattr(t, "timeout") else "moderate", expect_netstack_failure = hasattr(t, "expect_netstack_failure"), num_duts = t.num_duts if hasattr(t, "num_duts") else 1, ) for t in ALL_TESTS] diff --git a/test/packetimpact/tests/generic_dgram_socket_send_recv_test.go b/test/packetimpact/tests/generic_dgram_socket_send_recv_test.go new file mode 100644 index 000000000..00e0f7690 --- /dev/null +++ b/test/packetimpact/tests/generic_dgram_socket_send_recv_test.go @@ -0,0 +1,786 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package generic_dgram_socket_send_recv_test + +import ( + "context" + "flag" + "fmt" + "net" + "testing" + "time" + + "github.com/google/go-cmp/cmp" + "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/tcpip" + "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/test/packetimpact/testbench" +) + +const ( + // Even though sockets allow larger datagrams we don't test it here as they + // need to be fragmented and written out as individual frames. + + maxICMPv4PayloadSize = header.IPv4MinimumMTU - header.EthernetMinimumSize - header.IPv4MinimumSize - header.ICMPv4MinimumSize + maxICMPv6PayloadSize = header.IPv6MinimumMTU - header.EthernetMinimumSize - header.IPv6MinimumSize - header.ICMPv6MinimumSize + maxUDPv4PayloadSize = header.IPv4MinimumMTU - header.EthernetMinimumSize - header.IPv4MinimumSize - header.UDPMinimumSize + maxUDPv6PayloadSize = header.IPv6MinimumMTU - header.EthernetMinimumSize - header.IPv6MinimumSize - header.UDPMinimumSize +) + +func maxUDPPayloadSize(addr net.IP) int { + if addr.To4() != nil { + return maxUDPv4PayloadSize + } + return maxUDPv6PayloadSize +} + +func init() { + testbench.Initialize(flag.CommandLine) + testbench.RPCTimeout = 500 * time.Millisecond +} + +func expectedEthLayer(t *testing.T, dut testbench.DUT, socketFD int32, sendTo net.IP) testbench.Layer { + t.Helper() + dst := func() tcpip.LinkAddress { + if isBroadcast(dut, sendTo) { + dut.SetSockOptInt(t, socketFD, unix.SOL_SOCKET, unix.SO_BROADCAST, 1) + + // When sending to broadcast (subnet or limited), the expected ethernet + // address is also broadcast. + return header.EthernetBroadcastAddress + } + if sendTo.IsMulticast() { + if sendTo4 := sendTo.To4(); sendTo4 != nil { + return header.EthernetAddressFromMulticastIPv4Address(tcpip.Address(sendTo4)) + } + return header.EthernetAddressFromMulticastIPv6Address(tcpip.Address(sendTo.To16())) + } + return "" + }() + var ether testbench.Ether + if len(dst) != 0 { + ether.DstAddr = &dst + } + return ðer +} + +type protocolTest interface { + Name() string + Send(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) + Receive(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) +} + +func TestSocket(t *testing.T) { + dut := testbench.NewDUT(t) + subnetBroadcast := dut.Net.SubnetBroadcast() + + for _, proto := range []protocolTest{ + &icmpV4Test{}, + &icmpV6Test{}, + &udpTest{}, + } { + t.Run(proto.Name(), func(t *testing.T) { + // Test every combination of bound/unbound, broadcast/multicast/unicast + // bound/destination address, and bound/not-bound to device. + for _, bindTo := range []net.IP{ + nil, // Do not bind. + net.IPv4zero, + net.IPv4bcast, + net.IPv4allsys, + net.IPv6zero, + subnetBroadcast, + dut.Net.RemoteIPv4, + dut.Net.RemoteIPv6, + } { + t.Run(fmt.Sprintf("bindTo=%s", bindTo), func(t *testing.T) { + for _, sendTo := range []net.IP{ + net.IPv4bcast, + net.IPv4allsys, + subnetBroadcast, + dut.Net.LocalIPv4, + dut.Net.LocalIPv6, + dut.Net.RemoteIPv4, + dut.Net.RemoteIPv6, + } { + t.Run(fmt.Sprintf("sendTo=%s", sendTo), func(t *testing.T) { + for _, bindToDevice := range []bool{true, false} { + t.Run(fmt.Sprintf("bindToDevice=%t", bindToDevice), func(t *testing.T) { + t.Run("Send", func(t *testing.T) { + proto.Send(t, dut, bindTo, sendTo, bindToDevice) + }) + t.Run("Receive", func(t *testing.T) { + proto.Receive(t, dut, bindTo, sendTo, bindToDevice) + }) + }) + } + }) + } + }) + } + }) + } +} + +type icmpV4TestEnv struct { + socketFD int32 + ident uint16 + conn testbench.IPv4Conn + layers testbench.Layers +} + +type icmpV4Test struct{} + +func (test *icmpV4Test) setup(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) icmpV4TestEnv { + t.Helper() + + // Tell the DUT to create a socket. + var socketFD int32 + var ident uint16 + + if bindTo != nil { + socketFD, ident = dut.CreateBoundSocket(t, unix.SOCK_DGRAM, unix.IPPROTO_ICMP, bindTo) + } else { + // An unbound socket will auto-bind to INADDR_ANY. + socketFD = dut.Socket(t, unix.AF_INET, unix.SOCK_DGRAM, unix.IPPROTO_ICMP) + } + t.Cleanup(func() { + dut.Close(t, socketFD) + }) + + if bindToDevice { + dut.SetSockOpt(t, socketFD, unix.SOL_SOCKET, unix.SO_BINDTODEVICE, []byte(dut.Net.RemoteDevName)) + } + + // Create a socket on the test runner. + conn := dut.Net.NewIPv4Conn(t, testbench.IPv4{}, testbench.IPv4{}) + t.Cleanup(func() { + conn.Close(t) + }) + + return icmpV4TestEnv{ + socketFD: socketFD, + ident: ident, + conn: conn, + layers: testbench.Layers{ + expectedEthLayer(t, dut, socketFD, sendTo), + &testbench.IPv4{ + DstAddr: testbench.Address(tcpip.Address(sendTo.To4())), + }, + }, + } +} + +var _ protocolTest = (*icmpV4Test)(nil) + +func (*icmpV4Test) Name() string { return "icmpv4" } + +func (test *icmpV4Test) Send(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) { + if bindTo.To4() == nil || isBroadcastOrMulticast(dut, bindTo) { + // ICMPv4 sockets cannot bind to IPv6, broadcast, or multicast + // addresses. + return + } + + isV4 := sendTo.To4() != nil + + // TODO(gvisor.dev/issue/5681): Remove this case once ICMP sockets allow + // sending to broadcast and multicast addresses. + if (dut.Uname.IsGvisor() || dut.Uname.IsFuchsia()) && isV4 && isBroadcastOrMulticast(dut, sendTo) { + // expectPacket cannot be false. In some cases the packet will send, but + // with IPv4 destination incorrectly set to RemoteIPv4. It's all bad and + // not worth the effort to create a special case when this occurs. + t.Skip("TODO(gvisor.dev/issue/5681): Allow sending to broadcast and multicast addresses with ICMP sockets.") + } + + expectPacket := isV4 && !sendTo.Equal(dut.Net.RemoteIPv4) + switch { + case bindTo.Equal(dut.Net.RemoteIPv4): + // If we're explicitly bound to an interface's unicast address, + // packets are always sent on that interface. + case bindToDevice: + // If we're explicitly bound to an interface, packets are always + // sent on that interface. + case !sendTo.Equal(net.IPv4bcast) && !sendTo.IsMulticast(): + // If we're not sending to limited broadcast or multicast, the route + // table will be consulted and packets will be sent on the correct + // interface. + default: + expectPacket = false + } + + env := test.setup(t, dut, bindTo, sendTo, bindToDevice) + + for name, payload := range map[string][]byte{ + "empty": nil, + "small": []byte("hello world"), + "random1k": testbench.GenerateRandomPayload(t, maxICMPv4PayloadSize), + } { + t.Run(name, func(t *testing.T) { + icmpLayer := &testbench.ICMPv4{ + Type: testbench.ICMPv4Type(header.ICMPv4Echo), + Payload: payload, + } + bytes, err := icmpLayer.ToBytes() + if err != nil { + t.Fatalf("icmpLayer.ToBytes() = %s", err) + } + destSockaddr := unix.SockaddrInet4{} + copy(destSockaddr.Addr[:], sendTo.To4()) + + // Tell the DUT to send a packet out the ICMP socket. + if got, want := dut.SendTo(t, env.socketFD, bytes, 0, &destSockaddr), len(bytes); int(got) != want { + t.Fatalf("got dut.SendTo = %d, want %d", got, want) + } + + // Verify the test runner received an ICMP packet with the correctly + // set "ident". + if env.ident != 0 { + icmpLayer.Ident = &env.ident + } + want := append(env.layers, icmpLayer) + if got, ok := env.conn.ListenForFrame(t, want, time.Second); !ok && expectPacket { + t.Fatalf("did not receive expected frame matching %s\nGot frames: %s", want, got) + } else if ok && !expectPacket { + matchedFrame := got[len(got)-1] + t.Fatalf("got unexpected frame matching %s\nGot frame: %s", want, matchedFrame) + } + }) + } +} + +func (test *icmpV4Test) Receive(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) { + if bindTo.To4() == nil || isBroadcastOrMulticast(dut, bindTo) { + // ICMPv4 sockets cannot bind to IPv6, broadcast, or multicast + // addresses. + return + } + + expectPacket := (bindTo.Equal(dut.Net.RemoteIPv4) || bindTo.Equal(net.IPv4zero)) && sendTo.Equal(dut.Net.RemoteIPv4) + + // TODO(gvisor.dev/issue/5763): Remove this if statement once gVisor + // restricts ICMP sockets to receive only from unicast addresses. + if (dut.Uname.IsGvisor() || dut.Uname.IsFuchsia()) && bindTo.Equal(net.IPv4zero) && isBroadcastOrMulticast(dut, sendTo) { + expectPacket = true + } + + env := test.setup(t, dut, bindTo, sendTo, bindToDevice) + + for name, payload := range map[string][]byte{ + "empty": nil, + "small": []byte("hello world"), + "random1k": testbench.GenerateRandomPayload(t, maxICMPv4PayloadSize), + } { + t.Run(name, func(t *testing.T) { + icmpLayer := &testbench.ICMPv4{ + Type: testbench.ICMPv4Type(header.ICMPv4EchoReply), + Payload: payload, + } + if env.ident != 0 { + icmpLayer.Ident = &env.ident + } + + // Send an ICMPv4 packet from the test runner to the DUT. + frame := env.conn.CreateFrame(t, env.layers, icmpLayer) + env.conn.SendFrame(t, frame) + + // Verify the behavior of the ICMP socket on the DUT. + if expectPacket { + payload, err := icmpLayer.ToBytes() + if err != nil { + t.Fatalf("icmpLayer.ToBytes() = %s", err) + } + + // Receive one extra byte to assert the length of the + // packet received in the case where the packet contains + // more data than expected. + len := int32(len(payload)) + 1 + got, want := dut.Recv(t, env.socketFD, len, 0), payload + if diff := cmp.Diff(want, got); diff != "" { + t.Errorf("received payload does not match sent payload, diff (-want, +got):\n%s", diff) + } + } else { + // Expected receive error, set a short receive timeout. + dut.SetSockOptTimeval( + t, + env.socketFD, + unix.SOL_SOCKET, + unix.SO_RCVTIMEO, + &unix.Timeval{ + Sec: 1, + Usec: 0, + }, + ) + ret, recvPayload, errno := dut.RecvWithErrno(context.Background(), t, env.socketFD, maxICMPv4PayloadSize, 0) + if errno != unix.EAGAIN || errno != unix.EWOULDBLOCK { + t.Errorf("Recv got unexpected result, ret=%d, payload=%q, errno=%s", ret, recvPayload, errno) + } + } + }) + } +} + +type icmpV6TestEnv struct { + socketFD int32 + ident uint16 + conn testbench.IPv6Conn + layers testbench.Layers +} + +// icmpV6Test and icmpV4Test look substantially similar at first look, but have +// enough subtle differences in setup and test expectations to discourage +// refactoring: +// - Different IP layers +// - Different testbench.Connections +// - Different UNIX domain and proto arguments +// - Different expectPacket and wantErrno for send and receive +type icmpV6Test struct{} + +func (test *icmpV6Test) setup(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) icmpV6TestEnv { + t.Helper() + + // Tell the DUT to create a socket. + var socketFD int32 + var ident uint16 + + if bindTo != nil { + socketFD, ident = dut.CreateBoundSocket(t, unix.SOCK_DGRAM, unix.IPPROTO_ICMPV6, bindTo) + } else { + // An unbound socket will auto-bind to IN6ADDR_ANY_INIT. + socketFD = dut.Socket(t, unix.AF_INET6, unix.SOCK_DGRAM, unix.IPPROTO_ICMPV6) + } + t.Cleanup(func() { + dut.Close(t, socketFD) + }) + + if bindToDevice { + dut.SetSockOpt(t, socketFD, unix.SOL_SOCKET, unix.SO_BINDTODEVICE, []byte(dut.Net.RemoteDevName)) + } + + // Create a socket on the test runner. + conn := dut.Net.NewIPv6Conn(t, testbench.IPv6{}, testbench.IPv6{}) + t.Cleanup(func() { + conn.Close(t) + }) + + return icmpV6TestEnv{ + socketFD: socketFD, + ident: ident, + conn: conn, + layers: testbench.Layers{ + expectedEthLayer(t, dut, socketFD, sendTo), + &testbench.IPv6{ + DstAddr: testbench.Address(tcpip.Address(sendTo.To16())), + }, + }, + } +} + +var _ protocolTest = (*icmpV6Test)(nil) + +func (*icmpV6Test) Name() string { return "icmpv6" } + +func (test *icmpV6Test) Send(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) { + if bindTo.To4() != nil || bindTo.IsMulticast() { + // ICMPv6 sockets cannot bind to IPv4 or multicast addresses. + return + } + + expectPacket := sendTo.Equal(dut.Net.LocalIPv6) + wantErrno := unix.Errno(0) + + if sendTo.To4() != nil { + wantErrno = unix.EINVAL + } + + // TODO(gvisor.dev/issue/5966): Remove this if statement once ICMPv6 sockets + // return EINVAL after calling sendto with an IPv4 address. + if (dut.Uname.IsGvisor() || dut.Uname.IsFuchsia()) && sendTo.To4() != nil { + switch { + case bindTo.Equal(dut.Net.RemoteIPv6): + wantErrno = unix.ENETUNREACH + case bindTo.Equal(net.IPv6zero) || bindTo == nil: + wantErrno = unix.Errno(0) + } + } + + env := test.setup(t, dut, bindTo, sendTo, bindToDevice) + + for name, payload := range map[string][]byte{ + "empty": nil, + "small": []byte("hello world"), + "random1k": testbench.GenerateRandomPayload(t, maxICMPv6PayloadSize), + } { + t.Run(name, func(t *testing.T) { + icmpLayer := &testbench.ICMPv6{ + Type: testbench.ICMPv6Type(header.ICMPv6EchoRequest), + Payload: payload, + } + bytes, err := icmpLayer.ToBytes() + if err != nil { + t.Fatalf("icmpLayer.ToBytes() = %s", err) + } + destSockaddr := unix.SockaddrInet6{ + ZoneId: dut.Net.RemoteDevID, + } + copy(destSockaddr.Addr[:], sendTo.To16()) + + // Tell the DUT to send a packet out the ICMPv6 socket. + ctx, cancel := context.WithTimeout(context.Background(), testbench.RPCTimeout) + defer cancel() + gotRet, gotErrno := dut.SendToWithErrno(ctx, t, env.socketFD, bytes, 0, &destSockaddr) + + if gotErrno != wantErrno { + t.Fatalf("got dut.SendToWithErrno(_, _, %d, _, _, %s) = (_, %s), want = (_, %s)", env.socketFD, sendTo, gotErrno, wantErrno) + } + if wantErrno != 0 { + return + } + if got, want := int(gotRet), len(bytes); got != want { + t.Fatalf("got dut.SendToWithErrno(_, _, %d, _, _, %s) = (%d, _), want = (%d, _)", env.socketFD, sendTo, got, want) + } + + // Verify the test runner received an ICMPv6 packet with the + // correctly set "ident". + if env.ident != 0 { + icmpLayer.Ident = &env.ident + } + want := append(env.layers, icmpLayer) + if got, ok := env.conn.ListenForFrame(t, want, time.Second); !ok && expectPacket { + t.Fatalf("did not receive expected frame matching %s\nGot frames: %s", want, got) + } else if ok && !expectPacket { + matchedFrame := got[len(got)-1] + t.Fatalf("got unexpected frame matching %s\nGot frame: %s", want, matchedFrame) + } + }) + } +} + +func (test *icmpV6Test) Receive(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) { + if bindTo.To4() != nil || bindTo.IsMulticast() { + // ICMPv6 sockets cannot bind to IPv4 or multicast addresses. + return + } + + expectPacket := true + switch { + case bindTo.Equal(dut.Net.RemoteIPv6) && sendTo.Equal(dut.Net.RemoteIPv6): + case bindTo.Equal(net.IPv6zero) && sendTo.Equal(dut.Net.RemoteIPv6): + case bindTo.Equal(net.IPv6zero) && sendTo.Equal(net.IPv6linklocalallnodes): + default: + expectPacket = false + } + + // TODO(gvisor.dev/issue/5763): Remove this if statement once gVisor + // restricts ICMP sockets to receive only from unicast addresses. + if (dut.Uname.IsGvisor() || dut.Uname.IsFuchsia()) && bindTo.Equal(net.IPv6zero) && isBroadcastOrMulticast(dut, sendTo) { + expectPacket = false + } + + env := test.setup(t, dut, bindTo, sendTo, bindToDevice) + + for name, payload := range map[string][]byte{ + "empty": nil, + "small": []byte("hello world"), + "random1k": testbench.GenerateRandomPayload(t, maxICMPv6PayloadSize), + } { + t.Run(name, func(t *testing.T) { + icmpLayer := &testbench.ICMPv6{ + Type: testbench.ICMPv6Type(header.ICMPv6EchoReply), + Payload: payload, + } + if env.ident != 0 { + icmpLayer.Ident = &env.ident + } + + // Send an ICMPv6 packet from the test runner to the DUT. + frame := env.conn.CreateFrame(t, env.layers, icmpLayer) + env.conn.SendFrame(t, frame) + + // Verify the behavior of the ICMPv6 socket on the DUT. + if expectPacket { + payload, err := icmpLayer.ToBytes() + if err != nil { + t.Fatalf("icmpLayer.ToBytes() = %s", err) + } + + // Receive one extra byte to assert the length of the + // packet received in the case where the packet contains + // more data than expected. + len := int32(len(payload)) + 1 + got, want := dut.Recv(t, env.socketFD, len, 0), payload + if diff := cmp.Diff(want, got); diff != "" { + t.Errorf("received payload does not match sent payload, diff (-want, +got):\n%s", diff) + } + } else { + // Expected receive error, set a short receive timeout. + dut.SetSockOptTimeval( + t, + env.socketFD, + unix.SOL_SOCKET, + unix.SO_RCVTIMEO, + &unix.Timeval{ + Sec: 1, + Usec: 0, + }, + ) + ret, recvPayload, errno := dut.RecvWithErrno(context.Background(), t, env.socketFD, maxICMPv6PayloadSize, 0) + if errno != unix.EAGAIN || errno != unix.EWOULDBLOCK { + t.Errorf("Recv got unexpected result, ret=%d, payload=%q, errno=%s", ret, recvPayload, errno) + } + } + }) + } +} + +type udpConn interface { + SrcPort(*testing.T) uint16 + SendFrame(*testing.T, testbench.Layers, ...testbench.Layer) + ListenForFrame(*testing.T, testbench.Layers, time.Duration) ([]testbench.Layers, bool) + Close(*testing.T) +} + +type udpTestEnv struct { + socketFD int32 + conn udpConn + layers testbench.Layers +} + +type udpTest struct{} + +func (test *udpTest) setup(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) udpTestEnv { + t.Helper() + + var ( + socketFD int32 + outgoingUDP, incomingUDP testbench.UDP + ) + + // Tell the DUT to create a socket. + if bindTo != nil { + var remotePort uint16 + socketFD, remotePort = dut.CreateBoundSocket(t, unix.SOCK_DGRAM, unix.IPPROTO_UDP, bindTo) + outgoingUDP.DstPort = &remotePort + incomingUDP.SrcPort = &remotePort + } else { + // An unbound socket will auto-bind to INADDR_ANY. + socketFD = dut.Socket(t, unix.AF_INET6, unix.SOCK_DGRAM, unix.IPPROTO_UDP) + } + t.Cleanup(func() { + dut.Close(t, socketFD) + }) + + if bindToDevice { + dut.SetSockOpt(t, socketFD, unix.SOL_SOCKET, unix.SO_BINDTODEVICE, []byte(dut.Net.RemoteDevName)) + } + + // Create a socket on the test runner. + var conn udpConn + var ipLayer testbench.Layer + if addr := sendTo.To4(); addr != nil { + udpConn := dut.Net.NewUDPIPv4(t, outgoingUDP, incomingUDP) + conn = &udpConn + ipLayer = &testbench.IPv4{ + DstAddr: testbench.Address(tcpip.Address(addr)), + } + } else { + udpConn := dut.Net.NewUDPIPv6(t, outgoingUDP, incomingUDP) + conn = &udpConn + ipLayer = &testbench.IPv6{ + DstAddr: testbench.Address(tcpip.Address(sendTo.To16())), + } + } + t.Cleanup(func() { + conn.Close(t) + }) + + return udpTestEnv{ + socketFD: socketFD, + conn: conn, + layers: testbench.Layers{ + expectedEthLayer(t, dut, socketFD, sendTo), + ipLayer, + &incomingUDP, + }, + } +} + +var _ protocolTest = (*udpTest)(nil) + +func (*udpTest) Name() string { return "udp" } + +func (test *udpTest) Send(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) { + canSend := bindTo == nil || bindTo.Equal(net.IPv6zero) || sameIPVersion(sendTo, bindTo) + expectPacket := canSend && !isRemoteAddr(dut, sendTo) + switch { + case bindTo.Equal(dut.Net.RemoteIPv4): + // If we're explicitly bound to an interface's unicast address, + // packets are always sent on that interface. + case bindToDevice: + // If we're explicitly bound to an interface, packets are always + // sent on that interface. + case !sendTo.Equal(net.IPv4bcast) && !sendTo.IsMulticast(): + // If we're not sending to limited broadcast, multicast, or local, the + // route table will be consulted and packets will be sent on the correct + // interface. + default: + expectPacket = false + } + + wantErrno := unix.Errno(0) + switch { + case !canSend && bindTo.To4() != nil: + wantErrno = unix.EAFNOSUPPORT + case !canSend && bindTo.To4() == nil: + wantErrno = unix.ENETUNREACH + } + + // TODO(gvisor.dev/issue/5967): Remove this if statement once UDPv4 sockets + // returns EAFNOSUPPORT after calling sendto with an IPv6 address. + if dut.Uname.IsGvisor() && !canSend && bindTo.To4() != nil { + wantErrno = unix.EINVAL + } + + env := test.setup(t, dut, bindTo, sendTo, bindToDevice) + + for name, payload := range map[string][]byte{ + "empty": nil, + "small": []byte("hello world"), + "random1k": testbench.GenerateRandomPayload(t, maxUDPPayloadSize(bindTo)), + } { + t.Run(name, func(t *testing.T) { + var destSockaddr unix.Sockaddr + if sendTo4 := sendTo.To4(); sendTo4 != nil { + addr := unix.SockaddrInet4{ + Port: int(env.conn.SrcPort(t)), + } + copy(addr.Addr[:], sendTo4) + destSockaddr = &addr + } else { + addr := unix.SockaddrInet6{ + Port: int(env.conn.SrcPort(t)), + ZoneId: dut.Net.RemoteDevID, + } + copy(addr.Addr[:], sendTo.To16()) + destSockaddr = &addr + } + + // Tell the DUT to send a packet out the UDP socket. + ctx, cancel := context.WithTimeout(context.Background(), testbench.RPCTimeout) + defer cancel() + gotRet, gotErrno := dut.SendToWithErrno(ctx, t, env.socketFD, payload, 0, destSockaddr) + + if gotErrno != wantErrno { + t.Fatalf("got dut.SendToWithErrno(_, _, %d, _, _, %s) = (_, %s), want = (_, %s)", env.socketFD, sendTo, gotErrno, wantErrno) + } + if wantErrno != 0 { + return + } + if got, want := int(gotRet), len(payload); got != want { + t.Fatalf("got dut.SendToWithErrno(_, _, %d, _, _, %s) = (%d, _), want = (%d, _)", env.socketFD, sendTo, got, want) + } + + // Verify the test runner received a UDP packet with the + // correct payload. + want := append(env.layers, &testbench.Payload{ + Bytes: payload, + }) + if got, ok := env.conn.ListenForFrame(t, want, time.Second); !ok && expectPacket { + t.Fatalf("did not receive expected frame matching %s\nGot frames: %s", want, got) + } else if ok && !expectPacket { + matchedFrame := got[len(got)-1] + t.Fatalf("got unexpected frame matching %s\nGot frame: %s", want, matchedFrame) + } + }) + } +} + +func (test *udpTest) Receive(t *testing.T, dut testbench.DUT, bindTo, sendTo net.IP, bindToDevice bool) { + subnetBroadcast := dut.Net.SubnetBroadcast() + + expectPacket := true + switch { + case bindTo.Equal(sendTo): + case bindTo.Equal(net.IPv4zero) && sameIPVersion(bindTo, sendTo) && !sendTo.Equal(dut.Net.LocalIPv4): + case bindTo.Equal(net.IPv6zero) && isBroadcast(dut, sendTo): + case bindTo.Equal(net.IPv6zero) && isRemoteAddr(dut, sendTo): + case bindTo.Equal(subnetBroadcast) && sendTo.Equal(subnetBroadcast): + default: + expectPacket = false + } + + // TODO(gvisor.dev/issue/5956): Remove this if statement once gVisor + // restricts ICMP sockets to receive only from unicast addresses. + if (dut.Uname.IsGvisor() || dut.Uname.IsFuchsia()) && bindTo.Equal(net.IPv6zero) && sendTo.Equal(net.IPv4allsys) { + expectPacket = true + } + + env := test.setup(t, dut, bindTo, sendTo, bindToDevice) + maxPayloadSize := maxUDPPayloadSize(bindTo) + + for name, payload := range map[string][]byte{ + "empty": nil, + "small": []byte("hello world"), + "random1k": testbench.GenerateRandomPayload(t, maxPayloadSize), + } { + t.Run(name, func(t *testing.T) { + // Send a UDP packet from the test runner to the DUT. + env.conn.SendFrame(t, env.layers, &testbench.Payload{Bytes: payload}) + + // Verify the behavior of the ICMP socket on the DUT. + if expectPacket { + // Receive one extra byte to assert the length of the + // packet received in the case where the packet contains + // more data than expected. + len := int32(len(payload)) + 1 + got, want := dut.Recv(t, env.socketFD, len, 0), payload + if diff := cmp.Diff(want, got); diff != "" { + t.Errorf("received payload does not match sent payload, diff (-want, +got):\n%s", diff) + } + } else { + // Expected receive error, set a short receive timeout. + dut.SetSockOptTimeval( + t, + env.socketFD, + unix.SOL_SOCKET, + unix.SO_RCVTIMEO, + &unix.Timeval{ + Sec: 1, + Usec: 0, + }, + ) + ret, recvPayload, errno := dut.RecvWithErrno(context.Background(), t, env.socketFD, int32(maxPayloadSize), 0) + if errno != unix.EAGAIN || errno != unix.EWOULDBLOCK { + t.Errorf("Recv got unexpected result, ret=%d, payload=%q, errno=%s", ret, recvPayload, errno) + } + } + }) + } +} + +func isBroadcast(dut testbench.DUT, ip net.IP) bool { + return ip.Equal(net.IPv4bcast) || ip.Equal(dut.Net.SubnetBroadcast()) +} + +func isBroadcastOrMulticast(dut testbench.DUT, ip net.IP) bool { + return isBroadcast(dut, ip) || ip.IsMulticast() +} + +func sameIPVersion(a, b net.IP) bool { + return (a.To4() == nil) == (b.To4() == nil) +} + +func isRemoteAddr(dut testbench.DUT, ip net.IP) bool { + return ip.Equal(dut.Net.RemoteIPv4) || ip.Equal(dut.Net.RemoteIPv6) +} diff --git a/test/packetimpact/tests/icmpv6_param_problem_test.go b/test/packetimpact/tests/icmpv6_param_problem_test.go index 1beccb6cf..fdabcf1ad 100644 --- a/test/packetimpact/tests/icmpv6_param_problem_test.go +++ b/test/packetimpact/tests/icmpv6_param_problem_test.go @@ -15,7 +15,6 @@ package icmpv6_param_problem_test import ( - "encoding/binary" "flag" "testing" "time" @@ -56,13 +55,11 @@ func TestICMPv6ParamProblemTest(t *testing.T) { t.Fatalf("can't convert %s to bytes: %s", ipv6Sent, err) } - // The problematic field is the NextHeader. - b := make([]byte, 4) - binary.BigEndian.PutUint32(b, header.IPv6NextHeaderOffset) - expectedPayload = append(b, expectedPayload...) expectedICMPv6 := testbench.ICMPv6{ Type: testbench.ICMPv6Type(header.ICMPv6ParamProblem), Payload: expectedPayload, + // The problematic field is the NextHeader. + Pointer: testbench.Uint32(header.IPv6NextHeaderOffset), } paramProblem := testbench.Layers{ diff --git a/test/packetimpact/tests/ipv6_unknown_options_action_test.go b/test/packetimpact/tests/ipv6_unknown_options_action_test.go index f999d13d2..d762c43a7 100644 --- a/test/packetimpact/tests/ipv6_unknown_options_action_test.go +++ b/test/packetimpact/tests/ipv6_unknown_options_action_test.go @@ -15,7 +15,6 @@ package ipv6_unknown_options_action_test import ( - "encoding/binary" "flag" "net" "testing" @@ -154,23 +153,22 @@ func TestIPv6UnknownOptionAction(t *testing.T) { outgoing := conn.CreateFrame(t, outgoingOverride, tt.mkExtHdr(optionTypeFromAction(tt.action))) conn.SendFrame(t, outgoing) ipv6Sent := outgoing[1:] - invokingPacket, err := ipv6Sent.ToBytes() + icmpv6Payload, err := ipv6Sent.ToBytes() if err != nil { t.Fatalf("failed to serialize the outgoing packet: %s", err) } - icmpv6Payload := make([]byte, 4) - // The pointer in the ICMPv6 parameter problem message should point to - // the option type of the unknown option. In our test case, it is the - // first option in the extension header whose option type is 2 bytes - // after the IPv6 header (after NextHeader and ExtHdrLen). - binary.BigEndian.PutUint32(icmpv6Payload, header.IPv6MinimumSize+2) - icmpv6Payload = append(icmpv6Payload, invokingPacket...) gotICMPv6, err := conn.ExpectFrame(t, testbench.Layers{ &testbench.Ether{}, &testbench.IPv6{}, &testbench.ICMPv6{ - Type: testbench.ICMPv6Type(header.ICMPv6ParamProblem), - Code: testbench.ICMPv6Code(header.ICMPv6UnknownOption), + Type: testbench.ICMPv6Type(header.ICMPv6ParamProblem), + Code: testbench.ICMPv6Code(header.ICMPv6UnknownOption), + // The pointer in the ICMPv6 parameter problem message + // should point to the option type of the unknown option. In + // our test case, it is the first option in the extension + // header whose option type is 2 bytes after the IPv6 header + // (after NextHeader and ExtHdrLen). + Pointer: testbench.Uint32(header.IPv6MinimumSize + 2), Payload: icmpv6Payload, }, }, time.Second) diff --git a/test/packetimpact/tests/tcp_connect_icmp_error_test.go b/test/packetimpact/tests/tcp_connect_icmp_error_test.go index 79bfe9eb7..3b4c4cd63 100644 --- a/test/packetimpact/tests/tcp_connect_icmp_error_test.go +++ b/test/packetimpact/tests/tcp_connect_icmp_error_test.go @@ -33,17 +33,18 @@ func init() { func sendICMPError(t *testing.T, conn *testbench.TCPIPv4, tcp *testbench.TCP) { t.Helper() - layers := conn.CreateFrame(t, nil) - layers = layers[:len(layers)-1] - ip, ok := tcp.Prev().(*testbench.IPv4) - if !ok { - t.Fatalf("expected %s to be IPv4", tcp.Prev()) + icmpPayload := testbench.Layers{tcp.Prev(), tcp} + bytes, err := icmpPayload.ToBytes() + if err != nil { + t.Fatalf("got icmpPayload.ToBytes() = (_, %s), want = (_, nil)", err) } - icmpErr := &testbench.ICMPv4{ - Type: testbench.ICMPv4Type(header.ICMPv4DstUnreachable), - Code: testbench.ICMPv4Code(header.ICMPv4HostUnreachable)} - layers = append(layers, icmpErr, ip, tcp) + layers := conn.CreateFrame(t, nil) + layers[len(layers)-1] = &testbench.ICMPv4{ + Type: testbench.ICMPv4Type(header.ICMPv4DstUnreachable), + Code: testbench.ICMPv4Code(header.ICMPv4HostUnreachable), + Payload: bytes, + } conn.SendFrameStateless(t, layers) } diff --git a/test/packetimpact/tests/tcp_info_test.go b/test/packetimpact/tests/tcp_info_test.go index 93f58ec49..b7514e846 100644 --- a/test/packetimpact/tests/tcp_info_test.go +++ b/test/packetimpact/tests/tcp_info_test.go @@ -21,8 +21,6 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/binary" - "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/test/packetimpact/testbench" ) @@ -53,13 +51,10 @@ func TestTCPInfo(t *testing.T) { } conn.Send(t, testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagAck)}) - info := linux.TCPInfo{} - infoBytes := dut.GetSockOpt(t, acceptFD, unix.SOL_TCP, unix.TCP_INFO, int32(linux.SizeOfTCPInfo)) - if got, want := len(infoBytes), linux.SizeOfTCPInfo; got != want { - t.Fatalf("expected %T, got %d bytes want %d bytes", info, got, want) + info := dut.GetSockOptTCPInfo(t, acceptFD) + if got, want := uint32(info.State), linux.TCP_ESTABLISHED; got != want { + t.Fatalf("got %d want %d", got, want) } - binary.Unmarshal(infoBytes, hostarch.ByteOrder, &info) - rtt := time.Duration(info.RTT) * time.Microsecond rttvar := time.Duration(info.RTTVar) * time.Microsecond rto := time.Duration(info.RTO) * time.Microsecond @@ -94,12 +89,7 @@ func TestTCPInfo(t *testing.T) { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } - info = linux.TCPInfo{} - infoBytes = dut.GetSockOpt(t, acceptFD, unix.SOL_TCP, unix.TCP_INFO, int32(linux.SizeOfTCPInfo)) - if got, want := len(infoBytes), linux.SizeOfTCPInfo; got != want { - t.Fatalf("expected %T, got %d bytes want %d bytes", info, got, want) - } - binary.Unmarshal(infoBytes, hostarch.ByteOrder, &info) + info = dut.GetSockOptTCPInfo(t, acceptFD) if info.CaState != linux.TCP_CA_Loss { t.Errorf("expected the connection to be in loss recovery, got: %v want: %v", info.CaState, linux.TCP_CA_Loss) } diff --git a/test/packetimpact/tests/tcp_listen_backlog_test.go b/test/packetimpact/tests/tcp_listen_backlog_test.go index 26c812d0a..fea7d5b6f 100644 --- a/test/packetimpact/tests/tcp_listen_backlog_test.go +++ b/test/packetimpact/tests/tcp_listen_backlog_test.go @@ -55,15 +55,23 @@ func TestTCPListenBacklog(t *testing.T) { // Send the ACK to complete handshake. establishedConn.Send(t, testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagAck)}) + + // Poll for the established connection ready for accept. dut.PollOne(t, listenFd, unix.POLLIN, time.Second) - // Send the ACK to complete handshake, expect this to be ignored by the - // listener. + // Send the ACK to complete handshake, expect this to be dropped by the + // listener as the accept queue would be full because of the previous + // handshake. incompleteConn.Send(t, testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagAck)}) + // Let the test wait for sometime so that the ACK is indeed dropped by + // the listener. Without such a wait, the DUT accept can race with + // ACK handling (dropping) causing the test to be flaky. + time.Sleep(100 * time.Millisecond) // Drain the accept queue to enable poll for subsequent connections on the // listener. - dut.Accept(t, listenFd) + fd, _ := dut.Accept(t, listenFd) + dut.Close(t, fd) // The ACK for the incomplete connection should be ignored by the // listening endpoint and the poll on listener should now time out. diff --git a/test/packetimpact/tests/tcp_network_unreachable_test.go b/test/packetimpact/tests/tcp_network_unreachable_test.go index 5168450ad..60a2dbf3d 100644 --- a/test/packetimpact/tests/tcp_network_unreachable_test.go +++ b/test/packetimpact/tests/tcp_network_unreachable_test.go @@ -50,30 +50,24 @@ func TestTCPSynSentUnreachable(t *testing.T) { } // Get the SYN. - tcpLayers, err := conn.ExpectData(t, &testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagSyn)}, nil, time.Second) + tcp, err := conn.Expect(t, testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagSyn)}, time.Second) if err != nil { t.Fatalf("expected SYN: %s", err) } // Send a host unreachable message. - layers := conn.CreateFrame(t, nil) - layers = layers[:len(layers)-1] - const ipLayer = 1 - const tcpLayer = ipLayer + 1 - ip, ok := tcpLayers[ipLayer].(*testbench.IPv4) - if !ok { - t.Fatalf("expected %s to be IPv4", tcpLayers[ipLayer]) - } - tcp, ok := tcpLayers[tcpLayer].(*testbench.TCP) - if !ok { - t.Fatalf("expected %s to be TCP", tcpLayers[tcpLayer]) - } - var icmpv4 testbench.ICMPv4 = testbench.ICMPv4{ - Type: testbench.ICMPv4Type(header.ICMPv4DstUnreachable), - Code: testbench.ICMPv4Code(header.ICMPv4HostUnreachable), + icmpPayload := testbench.Layers{tcp.Prev(), tcp} + bytes, err := icmpPayload.ToBytes() + if err != nil { + t.Fatalf("got icmpPayload.ToBytes() = (_, %s), want = (_, nil)", err) } - layers = append(layers, &icmpv4, ip, tcp) + layers := conn.CreateFrame(t, nil) + layers[len(layers)-1] = &testbench.ICMPv4{ + Type: testbench.ICMPv4Type(header.ICMPv4DstUnreachable), + Code: testbench.ICMPv4Code(header.ICMPv4HostUnreachable), + Payload: bytes, + } conn.SendFrameStateless(t, layers) if err := getConnectError(t, &dut, clientFD); err != unix.EHOSTUNREACH { @@ -104,31 +98,24 @@ func TestTCPSynSentUnreachable6(t *testing.T) { } // Get the SYN. - tcpLayers, err := conn.ExpectData(t, &testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagSyn)}, nil, time.Second) + tcp, err := conn.Expect(t, &testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagSyn)}, time.Second) if err != nil { t.Fatalf("expected SYN: %s", err) } // Send a host unreachable message. - layers := conn.CreateFrame(t, nil) - layers = layers[:len(layers)-1] - const ipLayer = 1 - const tcpLayer = ipLayer + 1 - ip, ok := tcpLayers[ipLayer].(*testbench.IPv6) - if !ok { - t.Fatalf("expected %s to be IPv6", tcpLayers[ipLayer]) - } - tcp, ok := tcpLayers[tcpLayer].(*testbench.TCP) - if !ok { - t.Fatalf("expected %s to be TCP", tcpLayers[tcpLayer]) + icmpPayload := testbench.Layers{tcp.Prev(), tcp} + bytes, err := icmpPayload.ToBytes() + if err != nil { + t.Fatalf("got icmpPayload.ToBytes() = (_, %s), want = (_, nil)", err) } - var icmpv6 testbench.ICMPv6 = testbench.ICMPv6{ - Type: testbench.ICMPv6Type(header.ICMPv6DstUnreachable), - Code: testbench.ICMPv6Code(header.ICMPv6NetworkUnreachable), - // Per RFC 4443 3.1, the payload contains 4 zeroed bytes. - Payload: []byte{0, 0, 0, 0}, + + layers := conn.CreateFrame(t, nil) + layers[len(layers)-1] = &testbench.ICMPv6{ + Type: testbench.ICMPv6Type(header.ICMPv6DstUnreachable), + Code: testbench.ICMPv6Code(header.ICMPv6NetworkUnreachable), + Payload: bytes, } - layers = append(layers, &icmpv6, ip, tcp) conn.SendFrameStateless(t, layers) if err := getConnectError(t, &dut, clientFD); err != unix.ENETUNREACH { diff --git a/test/packetimpact/tests/tcp_rack_test.go b/test/packetimpact/tests/tcp_rack_test.go index ff1431bbf..5a60bf712 100644 --- a/test/packetimpact/tests/tcp_rack_test.go +++ b/test/packetimpact/tests/tcp_rack_test.go @@ -21,8 +21,6 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/binary" - "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/pkg/tcpip/seqnum" "gvisor.dev/gvisor/test/packetimpact/testbench" @@ -69,12 +67,7 @@ func closeSACKConnection(t *testing.T, dut testbench.DUT, conn testbench.TCPIPv4 } func getRTTAndRTO(t *testing.T, dut testbench.DUT, acceptFd int32) (rtt, rto time.Duration) { - info := linux.TCPInfo{} - infoBytes := dut.GetSockOpt(t, acceptFd, unix.SOL_TCP, unix.TCP_INFO, int32(linux.SizeOfTCPInfo)) - if got, want := len(infoBytes), linux.SizeOfTCPInfo; got != want { - t.Fatalf("expected %T, got %d bytes want %d bytes", info, got, want) - } - binary.Unmarshal(infoBytes, hostarch.ByteOrder, &info) + info := dut.GetSockOptTCPInfo(t, acceptFd) return time.Duration(info.RTT) * time.Microsecond, time.Duration(info.RTO) * time.Microsecond } @@ -402,12 +395,7 @@ func TestRACKWithLostRetransmission(t *testing.T) { } // Check the congestion control state. - info := linux.TCPInfo{} - infoBytes := dut.GetSockOpt(t, acceptFd, unix.SOL_TCP, unix.TCP_INFO, int32(linux.SizeOfTCPInfo)) - if got, want := len(infoBytes), linux.SizeOfTCPInfo; got != want { - t.Fatalf("expected %T, got %d bytes want %d bytes", info, got, want) - } - binary.Unmarshal(infoBytes, hostarch.ByteOrder, &info) + info := dut.GetSockOptTCPInfo(t, acceptFd) if info.CaState != linux.TCP_CA_Recovery { t.Fatalf("expected connection to be in fast recovery, want: %v got: %v", linux.TCP_CA_Recovery, info.CaState) } diff --git a/test/packetimpact/tests/tcp_retransmits_test.go b/test/packetimpact/tests/tcp_retransmits_test.go index 1eafe20c3..d3fb789f4 100644 --- a/test/packetimpact/tests/tcp_retransmits_test.go +++ b/test/packetimpact/tests/tcp_retransmits_test.go @@ -21,9 +21,6 @@ import ( "time" "golang.org/x/sys/unix" - "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/binary" - "gvisor.dev/gvisor/pkg/hostarch" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/test/packetimpact/testbench" ) @@ -33,12 +30,7 @@ func init() { } func getRTO(t *testing.T, dut testbench.DUT, acceptFd int32) (rto time.Duration) { - info := linux.TCPInfo{} - infoBytes := dut.GetSockOpt(t, acceptFd, unix.SOL_TCP, unix.TCP_INFO, int32(linux.SizeOfTCPInfo)) - if got, want := len(infoBytes), linux.SizeOfTCPInfo; got != want { - t.Fatalf("unexpected size for TCP_INFO, got %d bytes want %d bytes", got, want) - } - binary.Unmarshal(infoBytes, hostarch.ByteOrder, &info) + info := dut.GetSockOptTCPInfo(t, acceptFd) return time.Duration(info.RTO) * time.Microsecond } diff --git a/test/packetimpact/tests/tcp_syncookie_test.go b/test/packetimpact/tests/tcp_syncookie_test.go index 1c21c62ff..6be09996b 100644 --- a/test/packetimpact/tests/tcp_syncookie_test.go +++ b/test/packetimpact/tests/tcp_syncookie_test.go @@ -16,9 +16,12 @@ package tcp_syncookie_test import ( "flag" + "fmt" + "math" "testing" "time" + "github.com/google/go-cmp/cmp" "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/test/packetimpact/testbench" @@ -28,43 +31,121 @@ func init() { testbench.Initialize(flag.CommandLine) } -// TestSynCookie test if the DUT listener is replying back using syn cookies. -// The test does not complete the handshake by not sending the ACK to SYNACK. -// When syncookies are not used, this forces the listener to retransmit SYNACK. -// And when syncookies are being used, there is no such retransmit. +// TestTCPSynCookie tests for ACK handling for connections in SYNRCVD state +// connections with and without syncookies. It verifies if the passive open +// connection is indeed using syncookies before proceeding. func TestTCPSynCookie(t *testing.T) { dut := testbench.NewDUT(t) + for _, tt := range []struct { + accept bool + flags header.TCPFlags + }{ + {accept: true, flags: header.TCPFlagAck}, + {accept: true, flags: header.TCPFlagAck | header.TCPFlagPsh}, + {accept: false, flags: header.TCPFlagAck | header.TCPFlagSyn}, + {accept: true, flags: header.TCPFlagAck | header.TCPFlagFin}, + {accept: false, flags: header.TCPFlagAck | header.TCPFlagRst}, + {accept: false, flags: header.TCPFlagRst}, + } { + t.Run(fmt.Sprintf("flags=%s", tt.flags), func(t *testing.T) { + // Make a copy before parallelizing the test and refer to that + // within the test. Otherwise, the test reference could be pointing + // to an incorrect variant based on how it is scheduled. + test := tt - // Listening endpoint accepts one more connection than the listen backlog. - _, remotePort := dut.CreateListener(t, unix.SOCK_STREAM, unix.IPPROTO_TCP, 1 /*backlog*/) + t.Parallel() - var withoutSynCookieConn testbench.TCPIPv4 - var withSynCookieConn testbench.TCPIPv4 + // Listening endpoint accepts one more connection than the listen + // backlog. Listener starts using syncookies when it sees a new SYN + // and has backlog size of connections in SYNRCVD state. Keep the + // listen backlog 1, so that the test can define 2 connections + // without and with using syncookies. + listenFD, remotePort := dut.CreateListener(t, unix.SOCK_STREAM, unix.IPPROTO_TCP, 1 /*backlog*/) + defer dut.Close(t, listenFD) - // Test if the DUT listener replies to more SYNs than listen backlog+1 - for _, conn := range []*testbench.TCPIPv4{&withoutSynCookieConn, &withSynCookieConn} { - *conn = dut.Net.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) - } - defer withoutSynCookieConn.Close(t) - defer withSynCookieConn.Close(t) + var withoutSynCookieConn testbench.TCPIPv4 + var withSynCookieConn testbench.TCPIPv4 - checkSynAck := func(t *testing.T, conn *testbench.TCPIPv4, expectRetransmit bool) { - // Expect dut connection to have transitioned to SYN-RCVD state. - conn.Send(t, testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagSyn)}) - if _, err := conn.ExpectData(t, &testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagSyn | header.TCPFlagAck)}, nil, time.Second); err != nil { - t.Fatalf("expected SYN-ACK, but got %s", err) - } + for _, conn := range []*testbench.TCPIPv4{&withoutSynCookieConn, &withSynCookieConn} { + *conn = dut.Net.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) + } + defer withoutSynCookieConn.Close(t) + defer withSynCookieConn.Close(t) - // If the DUT listener is using syn cookies, it will not retransmit SYNACK - got, err := conn.ExpectData(t, &testbench.TCP{SeqNum: testbench.Uint32(uint32(*conn.RemoteSeqNum(t) - 1)), Flags: testbench.TCPFlags(header.TCPFlagSyn | header.TCPFlagAck)}, nil, 2*time.Second) - if expectRetransmit && err != nil { - t.Fatalf("expected retransmitted SYN-ACK, but got %s", err) - } - if !expectRetransmit && err == nil { - t.Fatalf("expected no retransmitted SYN-ACK, but got %s", got) - } - } + // Setup the 2 connections in SYNRCVD state and verify if one of the + // connection is indeed using syncookies by checking for absence of + // SYNACK retransmits. + for _, c := range []struct { + desc string + conn *testbench.TCPIPv4 + expectRetransmit bool + }{ + {desc: "without syncookies", conn: &withoutSynCookieConn, expectRetransmit: true}, + {desc: "with syncookies", conn: &withSynCookieConn, expectRetransmit: false}, + } { + t.Run(c.desc, func(t *testing.T) { + // Expect dut connection to have transitioned to SYNRCVD state. + c.conn.Send(t, testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagSyn)}) + if _, err := c.conn.ExpectData(t, &testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagSyn | header.TCPFlagAck)}, nil, time.Second); err != nil { + t.Fatalf("expected SYNACK, but got %s", err) + } + + // If the DUT listener is using syn cookies, it will not retransmit SYNACK. + got, err := c.conn.ExpectData(t, &testbench.TCP{SeqNum: testbench.Uint32(uint32(*c.conn.RemoteSeqNum(t) - 1)), Flags: testbench.TCPFlags(header.TCPFlagSyn | header.TCPFlagAck)}, nil, 2*time.Second) + if c.expectRetransmit && err != nil { + t.Fatalf("expected retransmitted SYNACK, but got %s", err) + } + if !c.expectRetransmit && err == nil { + t.Fatalf("expected no retransmitted SYNACK, but got %s", got) + } + }) + } - t.Run("without syncookies", func(t *testing.T) { checkSynAck(t, &withoutSynCookieConn, true /*expectRetransmit*/) }) - t.Run("with syncookies", func(t *testing.T) { checkSynAck(t, &withSynCookieConn, false /*expectRetransmit*/) }) + // Check whether ACKs with the given flags completes the handshake. + for _, c := range []struct { + desc string + conn *testbench.TCPIPv4 + }{ + {desc: "with syncookies", conn: &withSynCookieConn}, + {desc: "without syncookies", conn: &withoutSynCookieConn}, + } { + t.Run(c.desc, func(t *testing.T) { + pfds := dut.Poll(t, []unix.PollFd{{Fd: listenFD, Events: math.MaxInt16}}, 0 /*timeout*/) + if got, want := len(pfds), 0; got != want { + t.Fatalf("dut.Poll(...) = %d, want = %d", got, want) + } + + sampleData := []byte("Sample Data") + samplePayload := &testbench.Payload{Bytes: sampleData} + + c.conn.Send(t, testbench.TCP{Flags: testbench.TCPFlags(test.flags)}, samplePayload) + pfds = dut.Poll(t, []unix.PollFd{{Fd: listenFD, Events: unix.POLLIN}}, time.Second) + want := 0 + if test.accept { + want = 1 + } + if got := len(pfds); got != want { + t.Fatalf("got dut.Poll(...) = %d, want = %d", got, want) + } + // Accept the connection to enable poll on any subsequent connection. + if test.accept { + fd, _ := dut.Accept(t, listenFD) + if test.flags.Contains(header.TCPFlagFin) { + if dut.Uname.IsLinux() { + dut.PollOne(t, fd, unix.POLLIN|unix.POLLRDHUP, time.Second) + } else { + // TODO(gvisor.dev/issue/6015): Notify POLLIN|POLLRDHUP on incoming FIN. + dut.PollOne(t, fd, unix.POLLIN, time.Second) + } + } + got := dut.Recv(t, fd, int32(len(sampleData)), 0) + if diff := cmp.Diff(got, sampleData); diff != "" { + t.Fatalf("dut.Recv: data mismatch (-want +got):\n%s", diff) + } + dut.Close(t, fd) + } + }) + } + }) + } } diff --git a/test/packetimpact/tests/tcp_synsent_reset_test.go b/test/packetimpact/tests/tcp_synsent_reset_test.go index cccb0abc6..fe53e7061 100644 --- a/test/packetimpact/tests/tcp_synsent_reset_test.go +++ b/test/packetimpact/tests/tcp_synsent_reset_test.go @@ -20,6 +20,7 @@ import ( "time" "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/test/packetimpact/testbench" ) @@ -29,7 +30,7 @@ func init() { } // dutSynSentState sets up the dut connection in SYN-SENT state. -func dutSynSentState(t *testing.T) (*testbench.DUT, *testbench.TCPIPv4, uint16, uint16) { +func dutSynSentState(t *testing.T) (*testbench.DUT, *testbench.TCPIPv4, int32, uint16, uint16) { t.Helper() dut := testbench.NewDUT(t) @@ -46,26 +47,29 @@ func dutSynSentState(t *testing.T) (*testbench.DUT, *testbench.TCPIPv4, uint16, t.Fatalf("expected SYN\n") } - return &dut, &conn, port, clientPort + return &dut, &conn, clientFD, port, clientPort } // TestTCPSynSentReset tests RFC793, p67: SYN-SENT to CLOSED transition. func TestTCPSynSentReset(t *testing.T) { - _, conn, _, _ := dutSynSentState(t) + dut, conn, fd, _, _ := dutSynSentState(t) defer conn.Close(t) conn.Send(t, testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagRst | header.TCPFlagAck)}) // Expect the connection to have closed. - // TODO(gvisor.dev/issue/478): Check for TCP_INFO on the dut side. conn.Send(t, testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagAck)}) if _, err := conn.ExpectData(t, &testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagRst)}, nil, time.Second); err != nil { t.Fatalf("expected a TCP RST") } + info := dut.GetSockOptTCPInfo(t, fd) + if got, want := uint32(info.State), linux.TCP_CLOSE; got != want { + t.Fatalf("got %d want %d", got, want) + } } // TestTCPSynSentRcvdReset tests RFC793, p70, SYN-SENT to SYN-RCVD to CLOSED // transitions. func TestTCPSynSentRcvdReset(t *testing.T) { - dut, c, remotePort, clientPort := dutSynSentState(t) + dut, c, fd, remotePort, clientPort := dutSynSentState(t) defer c.Close(t) conn := dut.Net.NewTCPIPv4(t, testbench.TCP{SrcPort: &remotePort, DstPort: &clientPort}, testbench.TCP{SrcPort: &clientPort, DstPort: &remotePort}) @@ -79,9 +83,12 @@ func TestTCPSynSentRcvdReset(t *testing.T) { } conn.Send(t, testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagRst)}) // Expect the connection to have transitioned SYN-RCVD to CLOSED. - // TODO(gvisor.dev/issue/478): Check for TCP_INFO on the dut side. conn.Send(t, testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagAck)}) if _, err := conn.ExpectData(t, &testbench.TCP{Flags: testbench.TCPFlags(header.TCPFlagRst)}, nil, time.Second); err != nil { t.Fatalf("expected a TCP RST") } + info := dut.GetSockOptTCPInfo(t, fd) + if got, want := uint32(info.State), linux.TCP_CLOSE; got != want { + t.Fatalf("got %d want %d", got, want) + } } diff --git a/test/packetimpact/tests/udp_icmp_error_propagation_test.go b/test/packetimpact/tests/udp_icmp_error_propagation_test.go index 3159d5b89..087aeb66e 100644 --- a/test/packetimpact/tests/udp_icmp_error_propagation_test.go +++ b/test/packetimpact/tests/udp_icmp_error_propagation_test.go @@ -58,16 +58,20 @@ func (e icmpError) String() string { return "Unknown ICMP error" } -func (e icmpError) ToICMPv4() *testbench.ICMPv4 { +func (e icmpError) ToICMPv4(payload []byte) *testbench.ICMPv4 { switch e { case portUnreachable: return &testbench.ICMPv4{ - Type: testbench.ICMPv4Type(header.ICMPv4DstUnreachable), - Code: testbench.ICMPv4Code(header.ICMPv4PortUnreachable)} + Type: testbench.ICMPv4Type(header.ICMPv4DstUnreachable), + Code: testbench.ICMPv4Code(header.ICMPv4PortUnreachable), + Payload: payload, + } case timeToLiveExceeded: return &testbench.ICMPv4{ - Type: testbench.ICMPv4Type(header.ICMPv4TimeExceeded), - Code: testbench.ICMPv4Code(header.ICMPv4TTLExceeded)} + Type: testbench.ICMPv4Type(header.ICMPv4TimeExceeded), + Code: testbench.ICMPv4Code(header.ICMPv4TTLExceeded), + Payload: payload, + } } return nil } @@ -101,8 +105,6 @@ func wantErrno(c connectionMode, icmpErr icmpError) unix.Errno { func sendICMPError(t *testing.T, conn *testbench.UDPIPv4, icmpErr icmpError, udp *testbench.UDP) { t.Helper() - layers := conn.CreateFrame(t, nil) - layers = layers[:len(layers)-1] ip, ok := udp.Prev().(*testbench.IPv4) if !ok { t.Fatalf("expected %s to be IPv4", udp.Prev()) @@ -113,12 +115,15 @@ func sendICMPError(t *testing.T, conn *testbench.UDPIPv4, icmpErr icmpError, udp // to 1. ip.Checksum = nil } - // Note that the ICMP payload is valid in this case because the UDP - // payload is empty. If the UDP payload were not empty, the packet - // length during serialization may not be calculated correctly, - // resulting in a mal-formed packet. - layers = append(layers, icmpErr.ToICMPv4(), ip, udp) + icmpPayload := testbench.Layers{ip, udp} + bytes, err := icmpPayload.ToBytes() + if err != nil { + t.Fatalf("got icmpPayload.ToBytes() = (_, %s), want = (_, nil)", err) + } + + layers := conn.CreateFrame(t, nil) + layers[len(layers)-1] = icmpErr.ToICMPv4(bytes) conn.SendFrameStateless(t, layers) } diff --git a/test/packetimpact/tests/udp_send_recv_dgram_test.go b/test/packetimpact/tests/udp_send_recv_dgram_test.go deleted file mode 100644 index 230b012c7..000000000 --- a/test/packetimpact/tests/udp_send_recv_dgram_test.go +++ /dev/null @@ -1,329 +0,0 @@ -// Copyright 2020 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package udp_send_recv_dgram_test - -import ( - "context" - "flag" - "fmt" - "net" - "testing" - "time" - - "github.com/google/go-cmp/cmp" - "golang.org/x/sys/unix" - "gvisor.dev/gvisor/pkg/tcpip" - "gvisor.dev/gvisor/pkg/tcpip/header" - "gvisor.dev/gvisor/test/packetimpact/testbench" -) - -func init() { - testbench.Initialize(flag.CommandLine) - testbench.RPCTimeout = 500 * time.Millisecond -} - -type udpConn interface { - SrcPort(*testing.T) uint16 - SendFrame(*testing.T, testbench.Layers, ...testbench.Layer) - ExpectFrame(*testing.T, testbench.Layers, time.Duration) (testbench.Layers, error) - Close(*testing.T) -} - -type testCase struct { - bindTo, sendTo net.IP - sendToBroadcast, bindToDevice, expectData bool -} - -func TestUDP(t *testing.T) { - dut := testbench.NewDUT(t) - subnetBcast := func() net.IP { - subnet := (&tcpip.AddressWithPrefix{ - Address: tcpip.Address(dut.Net.RemoteIPv4.To4()), - PrefixLen: dut.Net.IPv4PrefixLength, - }).Subnet() - return net.IP(subnet.Broadcast()) - }() - - t.Run("Send", func(t *testing.T) { - var testCases []testCase - // Test every valid combination of bound/unbound, broadcast/multicast/unicast - // bound/destination address, and bound/not-bound to device. - for _, bindTo := range []net.IP{ - nil, // Do not bind. - net.IPv4zero, - net.IPv4bcast, - net.IPv4allsys, - subnetBcast, - dut.Net.RemoteIPv4, - dut.Net.RemoteIPv6, - } { - for _, sendTo := range []net.IP{ - net.IPv4bcast, - net.IPv4allsys, - subnetBcast, - dut.Net.LocalIPv4, - dut.Net.LocalIPv6, - } { - // Cannot send to an IPv4 address from a socket bound to IPv6 (except for IPv4-mapped IPv6), - // and viceversa. - if bindTo != nil && ((bindTo.To4() == nil) != (sendTo.To4() == nil)) { - continue - } - for _, bindToDevice := range []bool{true, false} { - expectData := true - switch { - case bindTo.Equal(dut.Net.RemoteIPv4): - // If we're explicitly bound to an interface's unicast address, - // packets are always sent on that interface. - case bindToDevice: - // If we're explicitly bound to an interface, packets are always - // sent on that interface. - case !sendTo.Equal(net.IPv4bcast) && !sendTo.IsMulticast(): - // If we're not sending to limited broadcast or multicast, the route table - // will be consulted and packets will be sent on the correct interface. - default: - expectData = false - } - testCases = append( - testCases, - testCase{ - bindTo: bindTo, - sendTo: sendTo, - sendToBroadcast: sendTo.Equal(subnetBcast) || sendTo.Equal(net.IPv4bcast), - bindToDevice: bindToDevice, - expectData: expectData, - }, - ) - } - } - } - for _, tc := range testCases { - boundTestCaseName := "unbound" - if tc.bindTo != nil { - boundTestCaseName = fmt.Sprintf("bindTo=%s", tc.bindTo) - } - t.Run(fmt.Sprintf("%s/sendTo=%s/bindToDevice=%t/expectData=%t", boundTestCaseName, tc.sendTo, tc.bindToDevice, tc.expectData), func(t *testing.T) { - runTestCase( - t, - dut, - tc, - func(t *testing.T, dut testbench.DUT, conn udpConn, socketFD int32, tc testCase, payload []byte, layers testbench.Layers) { - var destSockaddr unix.Sockaddr - if sendTo4 := tc.sendTo.To4(); sendTo4 != nil { - addr := unix.SockaddrInet4{ - Port: int(conn.SrcPort(t)), - } - copy(addr.Addr[:], sendTo4) - destSockaddr = &addr - } else { - addr := unix.SockaddrInet6{ - Port: int(conn.SrcPort(t)), - ZoneId: dut.Net.RemoteDevID, - } - copy(addr.Addr[:], tc.sendTo.To16()) - destSockaddr = &addr - } - if got, want := dut.SendTo(t, socketFD, payload, 0, destSockaddr), len(payload); int(got) != want { - t.Fatalf("got dut.SendTo = %d, want %d", got, want) - } - layers = append(layers, &testbench.Payload{ - Bytes: payload, - }) - _, err := conn.ExpectFrame(t, layers, time.Second) - - if !tc.expectData && err == nil { - t.Fatal("received unexpected packet, socket is not bound to device") - } - if err != nil && tc.expectData { - t.Fatal(err) - } - }, - ) - }) - } - }) - t.Run("Recv", func(t *testing.T) { - // Test every valid combination of broadcast/multicast/unicast - // bound/destination address, and bound/not-bound to device. - var testCases []testCase - for _, addr := range []net.IP{ - net.IPv4bcast, - net.IPv4allsys, - dut.Net.RemoteIPv4, - dut.Net.RemoteIPv6, - } { - for _, bindToDevice := range []bool{true, false} { - testCases = append( - testCases, - testCase{ - bindTo: addr, - sendTo: addr, - sendToBroadcast: addr.Equal(subnetBcast) || addr.Equal(net.IPv4bcast), - bindToDevice: bindToDevice, - expectData: true, - }, - ) - } - } - for _, bindTo := range []net.IP{ - net.IPv4zero, - subnetBcast, - dut.Net.RemoteIPv4, - } { - for _, sendTo := range []net.IP{ - subnetBcast, - net.IPv4bcast, - net.IPv4allsys, - } { - // TODO(gvisor.dev/issue/4896): Add bindTo=subnetBcast/sendTo=IPv4bcast - // and bindTo=subnetBcast/sendTo=IPv4allsys test cases. - if bindTo.Equal(subnetBcast) && (sendTo.Equal(net.IPv4bcast) || sendTo.IsMulticast()) { - continue - } - // Expect that a socket bound to a unicast address does not receive - // packets sent to an address other than the bound unicast address. - // - // Note: we cannot use net.IP.IsGlobalUnicast to test this condition - // because IsGlobalUnicast does not check whether the address is the - // subnet broadcast, and returns true in that case. - expectData := !bindTo.Equal(dut.Net.RemoteIPv4) || sendTo.Equal(dut.Net.RemoteIPv4) - for _, bindToDevice := range []bool{true, false} { - testCases = append( - testCases, - testCase{ - bindTo: bindTo, - sendTo: sendTo, - sendToBroadcast: sendTo.Equal(subnetBcast) || sendTo.Equal(net.IPv4bcast), - bindToDevice: bindToDevice, - expectData: expectData, - }, - ) - } - } - } - for _, tc := range testCases { - t.Run(fmt.Sprintf("bindTo=%s/sendTo=%s/bindToDevice=%t/expectData=%t", tc.bindTo, tc.sendTo, tc.bindToDevice, tc.expectData), func(t *testing.T) { - runTestCase( - t, - dut, - tc, - func(t *testing.T, dut testbench.DUT, conn udpConn, socketFD int32, tc testCase, payload []byte, layers testbench.Layers) { - conn.SendFrame(t, layers, &testbench.Payload{Bytes: payload}) - - if tc.expectData { - got, want := dut.Recv(t, socketFD, int32(len(payload)+1), 0), payload - if diff := cmp.Diff(want, got); diff != "" { - t.Errorf("received payload does not match sent payload, diff (-want, +got):\n%s", diff) - } - } else { - // Expected receive error, set a short receive timeout. - dut.SetSockOptTimeval( - t, - socketFD, - unix.SOL_SOCKET, - unix.SO_RCVTIMEO, - &unix.Timeval{ - Sec: 1, - Usec: 0, - }, - ) - ret, recvPayload, errno := dut.RecvWithErrno(context.Background(), t, socketFD, 100, 0) - if errno != unix.EAGAIN || errno != unix.EWOULDBLOCK { - t.Errorf("Recv got unexpected result, ret=%d, payload=%q, errno=%s", ret, recvPayload, errno) - } - } - }, - ) - }) - } - }) -} - -func runTestCase( - t *testing.T, - dut testbench.DUT, - tc testCase, - runTc func(t *testing.T, dut testbench.DUT, conn udpConn, socketFD int32, tc testCase, payload []byte, layers testbench.Layers), -) { - var ( - socketFD int32 - outgoingUDP, incomingUDP testbench.UDP - ) - if tc.bindTo != nil { - var remotePort uint16 - socketFD, remotePort = dut.CreateBoundSocket(t, unix.SOCK_DGRAM, unix.IPPROTO_UDP, tc.bindTo) - outgoingUDP.DstPort = &remotePort - incomingUDP.SrcPort = &remotePort - } else { - // An unbound socket will auto-bind to INNADDR_ANY and a random - // port on sendto. - socketFD = dut.Socket(t, unix.AF_INET6, unix.SOCK_DGRAM, unix.IPPROTO_UDP) - } - defer dut.Close(t, socketFD) - if tc.bindToDevice { - dut.SetSockOpt(t, socketFD, unix.SOL_SOCKET, unix.SO_BINDTODEVICE, []byte(dut.Net.RemoteDevName)) - } - - var ethernetLayer testbench.Ether - if tc.sendToBroadcast { - dut.SetSockOptInt(t, socketFD, unix.SOL_SOCKET, unix.SO_BROADCAST, 1) - - // When sending to broadcast (subnet or limited), the expected ethernet - // address is also broadcast. - ethernetBroadcastAddress := header.EthernetBroadcastAddress - ethernetLayer.DstAddr = ðernetBroadcastAddress - } else if tc.sendTo.IsMulticast() { - ethernetMulticastAddress := header.EthernetAddressFromMulticastIPv4Address(tcpip.Address(tc.sendTo.To4())) - ethernetLayer.DstAddr = ðernetMulticastAddress - } - expectedLayers := testbench.Layers{ðernetLayer} - - var conn udpConn - if sendTo4 := tc.sendTo.To4(); sendTo4 != nil { - v4Conn := dut.Net.NewUDPIPv4(t, outgoingUDP, incomingUDP) - conn = &v4Conn - expectedLayers = append( - expectedLayers, - &testbench.IPv4{ - DstAddr: testbench.Address(tcpip.Address(sendTo4)), - }, - ) - } else { - v6Conn := dut.Net.NewUDPIPv6(t, outgoingUDP, incomingUDP) - conn = &v6Conn - expectedLayers = append( - expectedLayers, - &testbench.IPv6{ - DstAddr: testbench.Address(tcpip.Address(tc.sendTo)), - }, - ) - } - defer conn.Close(t) - - expectedLayers = append(expectedLayers, &incomingUDP) - for _, v := range []struct { - name string - payload []byte - }{ - {"emptypayload", nil}, - {"small payload", []byte("hello world")}, - {"1kPayload", testbench.GenerateRandomPayload(t, 1<<10)}, - // Even though UDP allows larger dgrams we don't test it here as - // they need to be fragmented and written out as individual - // frames. - } { - runTc(t, dut, conn, socketFD, tc, v.payload, expectedLayers) - } -} diff --git a/test/runner/BUILD b/test/runner/BUILD index 582d2946d..f9f788726 100644 --- a/test/runner/BUILD +++ b/test/runner/BUILD @@ -5,7 +5,7 @@ package(licenses = ["notice"]) go_binary( name = "runner", testonly = 1, - srcs = ["runner.go"], + srcs = ["main.go"], data = [ "//runsc", ], diff --git a/test/runner/defs.bzl b/test/runner/defs.bzl index 2a0ef2cec..416f51935 100644 --- a/test/runner/defs.bzl +++ b/test/runner/defs.bzl @@ -88,6 +88,12 @@ def _syscall_test( tags = list(tags) tags += [full_platform, "file_" + file_access] + # Hash this target into one of 15 buckets. This can be used to + # randomly split targets between different workflows. + hash15 = hash(native.package_name() + name) % 15 + tags.append("hash15:" + str(hash15)) + tags.append("hash15") + # Disable off-host networking. tags.append("requires-net:loopback") tags.append("requires-net:ipv4") diff --git a/test/runner/runner.go b/test/runner/main.go index 7e8e88ba2..7e8e88ba2 100644 --- a/test/runner/runner.go +++ b/test/runner/main.go diff --git a/test/syscalls/BUILD b/test/syscalls/BUILD index 0435f61a2..99743b14a 100644 --- a/test/syscalls/BUILD +++ b/test/syscalls/BUILD @@ -216,6 +216,10 @@ syscall_test( ) syscall_test( + test = "//test/syscalls/linux:verity_getdents_test", +) + +syscall_test( test = "//test/syscalls/linux:getrandom_test", ) @@ -313,6 +317,10 @@ syscall_test( ) syscall_test( + test = "//test/syscalls/linux:verity_mmap_test", +) + +syscall_test( add_overlay = True, test = "//test/syscalls/linux:mount_test", ) diff --git a/test/syscalls/linux/BUILD b/test/syscalls/linux/BUILD index 94a582256..d8b562e9d 100644 --- a/test/syscalls/linux/BUILD +++ b/test/syscalls/linux/BUILD @@ -1,4 +1,4 @@ -load("//tools:defs.bzl", "cc_binary", "cc_library", "default_net_util", "gtest", "select_arch", "select_system") +load("//tools:defs.bzl", "cc_binary", "cc_library", "default_net_util", "gbenchmark", "gtest", "select_arch", "select_system") package( default_visibility = ["//:sandbox"], @@ -520,13 +520,14 @@ cc_binary( srcs = ["concurrency.cc"], linkstatic = 1, deps = [ - "@com_google_absl//absl/strings", - "@com_google_absl//absl/time", + gbenchmark, gtest, "//test/util:platform_util", "//test/util:test_main", "//test/util:test_util", "//test/util:thread_util", + "@com_google_absl//absl/strings", + "@com_google_absl//absl/time", ], ) @@ -961,6 +962,22 @@ cc_binary( ) cc_binary( + name = "verity_getdents_test", + testonly = 1, + srcs = ["verity_getdents.cc"], + linkstatic = 1, + deps = [ + "//test/util:capability_util", + gtest, + "//test/util:fs_util", + "//test/util:temp_path", + "//test/util:test_main", + "//test/util:test_util", + "//test/util:verity_util", + ], +) + +cc_binary( name = "getrandom_test", testonly = 1, srcs = ["getrandom.cc"], @@ -1024,6 +1041,7 @@ cc_binary( "//test/util:temp_path", "//test/util:test_main", "//test/util:test_util", + "//test/util:verity_util", ], ) @@ -1294,6 +1312,23 @@ cc_binary( ) cc_binary( + name = "verity_mmap_test", + testonly = 1, + srcs = ["verity_mmap.cc"], + linkstatic = 1, + deps = [ + "//test/util:capability_util", + gtest, + "//test/util:fs_util", + "//test/util:memory_util", + "//test/util:temp_path", + "//test/util:test_main", + "//test/util:test_util", + "//test/util:verity_util", + ], +) + +cc_binary( name = "mount_test", testonly = 1, srcs = ["mount.cc"], @@ -1327,6 +1362,7 @@ cc_binary( "//test/util:temp_path", "//test/util:test_main", "//test/util:test_util", + "//test/util:verity_util", ], ) @@ -1471,6 +1507,7 @@ cc_binary( "//test/util:cleanup", "//test/util:posix_error", "//test/util:pty_util", + "//test/util:signal_util", "//test/util:test_main", "//test/util:test_util", "//test/util:thread_util", @@ -1497,7 +1534,8 @@ cc_binary( cc_binary( name = "partial_bad_buffer_test", testonly = 1, - srcs = ["partial_bad_buffer.cc"], + # Android does not support preadv or pwritev in r22. + srcs = select_system(linux = ["partial_bad_buffer.cc"]), linkstatic = 1, deps = [ ":socket_test_util", @@ -1534,10 +1572,13 @@ cc_binary( srcs = ["ping_socket.cc"], linkstatic = 1, deps = [ + ":ip_socket_test_util", ":socket_test_util", "//test/util:file_descriptor", + "@com_google_absl//absl/algorithm:container", + "@com_google_absl//absl/strings", + "@com_google_absl//absl/types:optional", gtest, - "//test/util:save_util", "//test/util:test_main", "//test/util:test_util", ], @@ -1556,6 +1597,7 @@ cc_binary( "@com_google_absl//absl/time", gtest, "//test/util:posix_error", + "//test/util:signal_util", "//test/util:temp_path", "//test/util:test_main", "//test/util:test_util", @@ -3653,7 +3695,8 @@ cc_binary( cc_binary( name = "sync_test", testonly = 1, - srcs = ["sync.cc"], + # Android does not support syncfs in r22. + srcs = select_system(linux = ["sync.cc"]), linkstatic = 1, deps = [ gtest, @@ -3766,10 +3809,9 @@ cc_binary( srcs = ["timers.cc"], linkstatic = 1, deps = [ - "//test/util:cleanup", - "@com_google_absl//absl/flags:flag", - "@com_google_absl//absl/time", + gbenchmark, gtest, + "//test/util:cleanup", "//test/util:logging", "//test/util:multiprocess_util", "//test/util:posix_error", @@ -3777,6 +3819,8 @@ cc_binary( "//test/util:test_util", "//test/util:thread_util", "//test/util:timer_util", + "@com_google_absl//absl/flags:flag", + "@com_google_absl//absl/time", ], ) @@ -3948,7 +3992,8 @@ cc_binary( cc_binary( name = "utimes_test", testonly = 1, - srcs = ["utimes.cc"], + # Android does not support futimesat in r22. + srcs = select_system(linux = ["utimes.cc"]), linkstatic = 1, deps = [ "//test/util:file_descriptor", @@ -4064,7 +4109,8 @@ cc_binary( cc_binary( name = "semaphore_test", testonly = 1, - srcs = ["semaphore.cc"], + # Android does not support XSI semaphores in r22. + srcs = select_system(linux = ["semaphore.cc"]), linkstatic = 1, deps = [ "//test/util:capability_util", @@ -4247,10 +4293,12 @@ cc_binary( "//test/util:mount_util", "@com_google_absl//absl/strings", gtest, + "//test/util:cleanup", "//test/util:posix_error", "//test/util:temp_path", "//test/util:test_main", "//test/util:test_util", + "//test/util:thread_util", "@com_google_absl//absl/container:flat_hash_map", "@com_google_absl//absl/container:flat_hash_set", ], diff --git a/test/syscalls/linux/accept_bind.cc b/test/syscalls/linux/accept_bind.cc index fe560cfc5..aa13e9f84 100644 --- a/test/syscalls/linux/accept_bind.cc +++ b/test/syscalls/linux/accept_bind.cc @@ -37,7 +37,8 @@ TEST_P(AllSocketPairTest, Listen) { sockets->first_addr_size()), SyscallSucceeds()); - ASSERT_THAT(listen(sockets->first_fd(), /* backlog = */ 5), + ASSERT_THAT(listen(sockets->first_fd(), + /* backlog = */ 5), // NOLINT(bugprone-argument-comment) SyscallSucceeds()); } diff --git a/test/syscalls/linux/cgroup.cc b/test/syscalls/linux/cgroup.cc index 70ad5868f..f29891571 100644 --- a/test/syscalls/linux/cgroup.cc +++ b/test/syscalls/linux/cgroup.cc @@ -25,9 +25,11 @@ #include "absl/strings/str_split.h" #include "test/util/capability_util.h" #include "test/util/cgroup_util.h" +#include "test/util/cleanup.h" #include "test/util/mount_util.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" +#include "test/util/thread_util.h" namespace gvisor { namespace testing { @@ -192,6 +194,91 @@ TEST(Cgroup, MoptAllMustBeExclusive) { SyscallFailsWithErrno(EINVAL)); } +TEST(Cgroup, MountRace) { + SKIP_IF(!CgroupsAvailable()); + + TempPath mountpoint = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + + const DisableSave ds; // Too many syscalls. + + auto mount_thread = [&mountpoint]() { + for (int i = 0; i < 100; ++i) { + mount("none", mountpoint.path().c_str(), "cgroup", 0, 0); + } + }; + std::list<ScopedThread> threads; + for (int i = 0; i < 10; ++i) { + threads.emplace_back(mount_thread); + } + for (auto& t : threads) { + t.Join(); + } + + auto cleanup = Cleanup([&mountpoint] { + // We need 1 umount call per successful mount. If some of the mount calls + // were unsuccessful, their corresponding umount will silently fail. + for (int i = 0; i < (10 * 100) + 1; ++i) { + umount(mountpoint.path().c_str()); + } + }); + + Cgroup c = Cgroup(mountpoint.path()); + // c should be a valid cgroup. + EXPECT_NO_ERRNO(c.ContainsCallingProcess()); +} + +TEST(Cgroup, MountUnmountRace) { + SKIP_IF(!CgroupsAvailable()); + + TempPath mountpoint = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + + const DisableSave ds; // Too many syscalls. + + auto mount_thread = [&mountpoint]() { + for (int i = 0; i < 100; ++i) { + mount("none", mountpoint.path().c_str(), "cgroup", 0, 0); + } + }; + auto unmount_thread = [&mountpoint]() { + for (int i = 0; i < 100; ++i) { + umount(mountpoint.path().c_str()); + } + }; + std::list<ScopedThread> threads; + for (int i = 0; i < 10; ++i) { + threads.emplace_back(mount_thread); + } + for (int i = 0; i < 10; ++i) { + threads.emplace_back(unmount_thread); + } + for (auto& t : threads) { + t.Join(); + } + + // We don't know how many mount refs are remaining, since the count depends on + // the ordering of mount and umount calls. Keep calling unmount until it + // returns an error. + while (umount(mountpoint.path().c_str()) == 0) { + } +} + +TEST(Cgroup, UnmountRepeated) { + SKIP_IF(!CgroupsAvailable()); + + const DisableSave ds; // Too many syscalls. + + Mounter m(ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir())); + Cgroup c = ASSERT_NO_ERRNO_AND_VALUE(m.MountCgroupfs("")); + + // First unmount should succeed. + EXPECT_THAT(umount(c.Path().c_str()), SyscallSucceeds()); + + // We just manually unmounted, so release managed resources. + m.release(c); + + EXPECT_THAT(umount(c.Path().c_str()), SyscallFailsWithErrno(EINVAL)); +} + TEST(MemoryCgroup, MemoryUsageInBytes) { SKIP_IF(!CgroupsAvailable()); diff --git a/test/syscalls/linux/concurrency.cc b/test/syscalls/linux/concurrency.cc index 7cd6a75bd..f2daf49ee 100644 --- a/test/syscalls/linux/concurrency.cc +++ b/test/syscalls/linux/concurrency.cc @@ -20,6 +20,7 @@ #include "absl/strings/string_view.h" #include "absl/time/clock.h" #include "absl/time/time.h" +#include "benchmark/benchmark.h" #include "test/util/platform_util.h" #include "test/util/test_util.h" #include "test/util/thread_util.h" @@ -106,6 +107,8 @@ TEST(ConcurrencyTest, MultiProcessConcurrency) { pid_t child_pid = fork(); if (child_pid == 0) { while (true) { + int x = 0; + benchmark::DoNotOptimize(x); // Don't optimize this loop away. } } ASSERT_THAT(child_pid, SyscallSucceeds()); diff --git a/test/syscalls/linux/epoll.cc b/test/syscalls/linux/epoll.cc index af3d27894..3ef8b0327 100644 --- a/test/syscalls/linux/epoll.cc +++ b/test/syscalls/linux/epoll.cc @@ -230,6 +230,8 @@ TEST(EpollTest, WaitThenUnblock) { EXPECT_THAT(pthread_detach(thread), SyscallSucceeds()); } +#ifndef ANDROID // Android does not support pthread_cancel + void sighandler(int s) {} void* signaler(void* arg) { @@ -272,6 +274,8 @@ TEST(EpollTest, UnblockWithSignal) { EXPECT_THAT(pthread_detach(thread), SyscallSucceeds()); } +#endif // ANDROID + TEST(EpollTest, TimeoutNoFds) { auto epollfd = ASSERT_NO_ERRNO_AND_VALUE(NewEpollFD()); struct epoll_event result[kFDsPerEpoll]; diff --git a/test/syscalls/linux/exec.cc b/test/syscalls/linux/exec.cc index c5acfc794..a0016146a 100644 --- a/test/syscalls/linux/exec.cc +++ b/test/syscalls/linux/exec.cc @@ -283,7 +283,7 @@ TEST(ExecTest, InterpreterScriptTrailingWhitespace) { TempPath::CreateSymlinkTo("/tmp", RunfilePath(kBasicWorkload))); TempPath script = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( - GetAbsoluteTestTmpdir(), absl::StrCat("#!", link.path(), " "), 0755)); + GetAbsoluteTestTmpdir(), absl::StrCat("#!", link.path(), " \n"), 0755)); CheckExec(script.path(), {script.path()}, {}, ArgEnvExitStatus(1, 0), absl::StrCat(link.path(), "\n", script.path(), "\n")); @@ -304,7 +304,7 @@ TEST(ExecTest, InterpreterScriptArgWhitespace) { TEST(ExecTest, InterpreterScriptNoPath) { TempPath script = ASSERT_NO_ERRNO_AND_VALUE( - TempPath::CreateFileWith(GetAbsoluteTestTmpdir(), "#!", 0755)); + TempPath::CreateFileWith(GetAbsoluteTestTmpdir(), "#!\n\n", 0755)); int execve_errno; ASSERT_NO_ERRNO_AND_VALUE( diff --git a/test/syscalls/linux/exec_state_workload.cc b/test/syscalls/linux/exec_state_workload.cc index 028902b14..eafdc2bfa 100644 --- a/test/syscalls/linux/exec_state_workload.cc +++ b/test/syscalls/linux/exec_state_workload.cc @@ -26,6 +26,8 @@ #include "absl/strings/numbers.h" +#ifndef ANDROID // Conflicts with existing operator<< on Android. + // Pretty-print a sigset_t. std::ostream& operator<<(std::ostream& out, const sigset_t& s) { out << "{ "; @@ -40,6 +42,8 @@ std::ostream& operator<<(std::ostream& out, const sigset_t& s) { return out; } +#endif + // Verify that the signo handler is handler. int CheckSigHandler(uint32_t signo, uintptr_t handler) { struct sigaction sa; diff --git a/test/syscalls/linux/fcntl.cc b/test/syscalls/linux/fcntl.cc index 4fa6751ff..91526572b 100644 --- a/test/syscalls/linux/fcntl.cc +++ b/test/syscalls/linux/fcntl.cc @@ -390,9 +390,7 @@ TEST_F(FcntlLockTest, SetLockDir) { } TEST_F(FcntlLockTest, SetLockSymlink) { - // TODO(gvisor.dev/issue/2782): Replace with IsRunningWithVFS1() when O_PATH - // is supported. - SKIP_IF(IsRunningOnGvisor()); + SKIP_IF(IsRunningWithVFS1()); auto file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); auto symlink = ASSERT_NO_ERRNO_AND_VALUE( diff --git a/test/syscalls/linux/flock.cc b/test/syscalls/linux/flock.cc index fd387aa45..10dad042f 100644 --- a/test/syscalls/linux/flock.cc +++ b/test/syscalls/linux/flock.cc @@ -662,9 +662,7 @@ TEST(FlockTestNoFixture, FlockDir) { } TEST(FlockTestNoFixture, FlockSymlink) { - // TODO(gvisor.dev/issue/2782): Replace with IsRunningWithVFS1() when O_PATH - // is supported. - SKIP_IF(IsRunningOnGvisor()); + SKIP_IF(IsRunningWithVFS1()); auto file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); auto symlink = ASSERT_NO_ERRNO_AND_VALUE( diff --git a/test/syscalls/linux/ip_socket_test_util.cc b/test/syscalls/linux/ip_socket_test_util.cc index 98d07ae85..e90a7e411 100644 --- a/test/syscalls/linux/ip_socket_test_util.cc +++ b/test/syscalls/linux/ip_socket_test_util.cc @@ -140,6 +140,22 @@ SocketPairKind IPv4UDPUnboundSocketPair(int type) { /* dual_stack = */ false)}; } +SocketKind ICMPUnboundSocket(int type) { + std::string description = + absl::StrCat(DescribeSocketType(type), "ICMP socket"); + return SocketKind{ + description, AF_INET, type | SOCK_DGRAM, IPPROTO_ICMP, + UnboundSocketCreator(AF_INET, type | SOCK_DGRAM, IPPROTO_ICMP)}; +} + +SocketKind ICMPv6UnboundSocket(int type) { + std::string description = + absl::StrCat(DescribeSocketType(type), "ICMPv6 socket"); + return SocketKind{ + description, AF_INET6, type | SOCK_DGRAM, IPPROTO_ICMPV6, + UnboundSocketCreator(AF_INET6, type | SOCK_DGRAM, IPPROTO_ICMPV6)}; +} + SocketKind IPv4UDPUnboundSocket(int type) { std::string description = absl::StrCat(DescribeSocketType(type), "IPv4 UDP socket"); @@ -174,13 +190,21 @@ SocketKind IPv6TCPUnboundSocket(int type) { PosixError IfAddrHelper::Load() { Release(); +#ifndef ANDROID RETURN_ERROR_IF_SYSCALL_FAIL(getifaddrs(&ifaddr_)); +#else + // Android does not support getifaddrs in r22. + return PosixError(ENOSYS, "getifaddrs"); +#endif return NoError(); } void IfAddrHelper::Release() { if (ifaddr_) { +#ifndef ANDROID + // Android does not support freeifaddrs in r22. freeifaddrs(ifaddr_); +#endif ifaddr_ = nullptr; } } diff --git a/test/syscalls/linux/ip_socket_test_util.h b/test/syscalls/linux/ip_socket_test_util.h index 9c3859fcd..bde481f7e 100644 --- a/test/syscalls/linux/ip_socket_test_util.h +++ b/test/syscalls/linux/ip_socket_test_util.h @@ -84,20 +84,28 @@ SocketPairKind DualStackUDPBidirectionalBindSocketPair(int type); // SocketPairs created with AF_INET and the given type. SocketPairKind IPv4UDPUnboundSocketPair(int type); +// ICMPUnboundSocket returns a SocketKind that represents a SimpleSocket created +// with AF_INET, SOCK_DGRAM, IPPROTO_ICMP, and the given type. +SocketKind ICMPUnboundSocket(int type); + +// ICMPv6UnboundSocket returns a SocketKind that represents a SimpleSocket +// created with AF_INET6, SOCK_DGRAM, IPPROTO_ICMPV6, and the given type. +SocketKind ICMPv6UnboundSocket(int type); + // IPv4UDPUnboundSocket returns a SocketKind that represents a SimpleSocket -// created with AF_INET, SOCK_DGRAM, and the given type. +// created with AF_INET, SOCK_DGRAM, IPPROTO_UDP, and the given type. SocketKind IPv4UDPUnboundSocket(int type); // IPv6UDPUnboundSocket returns a SocketKind that represents a SimpleSocket -// created with AF_INET6, SOCK_DGRAM, and the given type. +// created with AF_INET6, SOCK_DGRAM, IPPROTO_UDP, and the given type. SocketKind IPv6UDPUnboundSocket(int type); // IPv4TCPUnboundSocket returns a SocketKind that represents a SimpleSocket -// created with AF_INET, SOCK_STREAM and the given type. +// created with AF_INET, SOCK_STREAM, IPPROTO_TCP and the given type. SocketKind IPv4TCPUnboundSocket(int type); // IPv6TCPUnboundSocket returns a SocketKind that represents a SimpleSocket -// created with AF_INET6, SOCK_STREAM and the given type. +// created with AF_INET6, SOCK_STREAM, IPPROTO_TCP and the given type. SocketKind IPv6TCPUnboundSocket(int type); // IfAddrHelper is a helper class that determines the local interfaces present diff --git a/test/syscalls/linux/lseek.cc b/test/syscalls/linux/lseek.cc index 6ce1e6cc3..d4f89527c 100644 --- a/test/syscalls/linux/lseek.cc +++ b/test/syscalls/linux/lseek.cc @@ -150,7 +150,7 @@ TEST(LseekTest, SeekCurrentDir) { // From include/linux/fs.h. constexpr loff_t MAX_LFS_FILESIZE = 0x7fffffffffffffff; - char* dir = get_current_dir_name(); + char* dir = getcwd(NULL, 0); const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(dir, O_RDONLY)); ASSERT_THAT(lseek(fd.get(), 0, SEEK_CUR), SyscallSucceeds()); diff --git a/test/syscalls/linux/ping_socket.cc b/test/syscalls/linux/ping_socket.cc index 8b78e4b16..8268e91da 100644 --- a/test/syscalls/linux/ping_socket.cc +++ b/test/syscalls/linux/ping_socket.cc @@ -12,6 +12,7 @@ // See the License for the specific language governing permissions and // limitations under the License. +#include <errno.h> #include <netinet/in.h> #include <netinet/ip.h> #include <netinet/ip_icmp.h> @@ -19,14 +20,22 @@ #include <sys/types.h> #include <unistd.h> +#include <cctype> +#include <cstring> #include <vector> #include "gtest/gtest.h" +#include "absl/algorithm/container.h" +#include "absl/strings/str_join.h" +#include "absl/types/optional.h" +#include "test/syscalls/linux/ip_socket_test_util.h" #include "test/syscalls/linux/socket_test_util.h" #include "test/util/file_descriptor.h" -#include "test/util/save_util.h" #include "test/util/test_util.h" +// Note: These tests require /proc/sys/net/ipv4/ping_group_range to be +// configured to allow the tester to create ping sockets (see icmp(7)). + namespace gvisor { namespace testing { namespace { @@ -42,7 +51,8 @@ TEST(PingSocket, ICMPPortExhaustion) { auto s = Socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP); if (!s.ok()) { ASSERT_EQ(s.error().errno_value(), EACCES); - GTEST_SKIP(); + GTEST_SKIP() << "TODO(gvisor.dev/issue/6126): Buildkite does not allow " + "creation of ICMP or ICMPv6 sockets"; } } @@ -70,7 +80,212 @@ TEST(PingSocket, ICMPPortExhaustion) { } } -} // namespace +struct BindTestCase { + TestAddress bind_to; + int want = 0; + absl::optional<int> want_gvisor; +}; + +// Test fixture for socket binding. +class Fixture + : public ::testing::TestWithParam<std::tuple<SocketKind, BindTestCase>> {}; + +TEST_P(Fixture, Bind) { + auto [socket_factory, test_case] = GetParam(); + auto socket = socket_factory.Create(); + if (!socket.ok()) { + ASSERT_EQ(socket.error().errno_value(), EACCES); + GTEST_SKIP() << "TODO(gvisor.dev/issue/6126): Buildkite does not allow " + "creation of ICMP or ICMPv6 sockets"; + } + auto socket_fd = std::move(socket).ValueOrDie(); + + const int want = test_case.want_gvisor.has_value() && IsRunningOnGvisor() + ? *test_case.want_gvisor + : test_case.want; + if (want == 0) { + EXPECT_THAT(bind(socket_fd->get(), AsSockAddr(&test_case.bind_to.addr), + test_case.bind_to.addr_len), + SyscallSucceeds()); + } else { + EXPECT_THAT(bind(socket_fd->get(), AsSockAddr(&test_case.bind_to.addr), + test_case.bind_to.addr_len), + SyscallFailsWithErrno(want)); + } +} + +std::vector<std::tuple<SocketKind, BindTestCase>> ICMPTestCases() { + return ApplyVec<std::tuple<SocketKind, BindTestCase>>( + [](const BindTestCase& test_case) { + return std::make_tuple(ICMPUnboundSocket(0), test_case); + }, + std::vector<BindTestCase>{ + { + .bind_to = V4Any(), + .want = 0, + .want_gvisor = 0, + }, + { + .bind_to = V4Broadcast(), + .want = EADDRNOTAVAIL, + // TODO(gvisor.dev/issue/5711): Remove want_gvisor once ICMP + // sockets are no longer allowed to bind to broadcast addresses. + .want_gvisor = 0, + }, + { + .bind_to = V4Loopback(), + .want = 0, + }, + { + .bind_to = V4LoopbackSubnetBroadcast(), + .want = EADDRNOTAVAIL, + // TODO(gvisor.dev/issue/5711): Remove want_gvisor once ICMP + // sockets are no longer allowed to bind to broadcast addresses. + .want_gvisor = 0, + }, + { + .bind_to = V4Multicast(), + .want = EADDRNOTAVAIL, + }, + { + .bind_to = V4MulticastAllHosts(), + .want = EADDRNOTAVAIL, + }, + { + .bind_to = V4AddrStr("IPv4UnknownUnicast", "192.168.1.1"), + .want = EADDRNOTAVAIL, + }, + // TODO(gvisor.dev/issue/6021): Remove want_gvisor from all the test + // cases below once ICMP sockets return EAFNOSUPPORT when binding to + // IPv6 addresses. + { + .bind_to = V6Any(), + .want = EAFNOSUPPORT, + .want_gvisor = EINVAL, + }, + { + .bind_to = V6Loopback(), + .want = EAFNOSUPPORT, + .want_gvisor = EINVAL, + }, + { + .bind_to = V6Multicast(), + .want = EAFNOSUPPORT, + .want_gvisor = EINVAL, + }, + { + .bind_to = V6MulticastInterfaceLocalAllNodes(), + .want = EAFNOSUPPORT, + .want_gvisor = EINVAL, + }, + { + .bind_to = V6MulticastLinkLocalAllNodes(), + .want = EAFNOSUPPORT, + .want_gvisor = EINVAL, + }, + { + .bind_to = V6MulticastLinkLocalAllRouters(), + .want = EAFNOSUPPORT, + .want_gvisor = EINVAL, + }, + { + .bind_to = V6AddrStr("IPv6UnknownUnicast", "fc00::1"), + .want = EAFNOSUPPORT, + .want_gvisor = EINVAL, + }, + }); +} +std::vector<std::tuple<SocketKind, BindTestCase>> ICMPv6TestCases() { + return ApplyVec<std::tuple<SocketKind, BindTestCase>>( + [](const BindTestCase& test_case) { + return std::make_tuple(ICMPv6UnboundSocket(0), test_case); + }, + std::vector<BindTestCase>{ + { + .bind_to = V4Any(), + .want = EINVAL, + }, + { + .bind_to = V4Broadcast(), + .want = EINVAL, + }, + { + .bind_to = V4Loopback(), + .want = EINVAL, + }, + { + .bind_to = V4LoopbackSubnetBroadcast(), + .want = EINVAL, + }, + { + .bind_to = V4Multicast(), + .want = EINVAL, + }, + { + .bind_to = V4MulticastAllHosts(), + .want = EINVAL, + }, + { + .bind_to = V4AddrStr("IPv4UnknownUnicast", "192.168.1.1"), + .want = EINVAL, + }, + { + .bind_to = V6Any(), + .want = 0, + }, + { + .bind_to = V6Loopback(), + .want = 0, + }, + // TODO(gvisor.dev/issue/6021): Remove want_gvisor from all the + // multicast test cases below once ICMPv6 sockets return EINVAL when + // binding to IPv6 multicast addresses. + { + .bind_to = V6Multicast(), + .want = EINVAL, + .want_gvisor = EADDRNOTAVAIL, + }, + { + .bind_to = V6MulticastInterfaceLocalAllNodes(), + .want = EINVAL, + .want_gvisor = EADDRNOTAVAIL, + }, + { + .bind_to = V6MulticastLinkLocalAllNodes(), + .want = EINVAL, + .want_gvisor = EADDRNOTAVAIL, + }, + { + .bind_to = V6MulticastLinkLocalAllRouters(), + .want = EINVAL, + .want_gvisor = EADDRNOTAVAIL, + }, + { + .bind_to = V6AddrStr("IPv6UnknownUnicast", "fc00::1"), + .want = EADDRNOTAVAIL, + }, + }); +} + +std::vector<std::tuple<SocketKind, BindTestCase>> AllTestCases() { + return VecCat<std::tuple<SocketKind, BindTestCase>>(ICMPTestCases(), + ICMPv6TestCases()); +} + +std::string TestDescription( + const ::testing::TestParamInfo<Fixture::ParamType>& info) { + auto [socket_factory, test_case] = info.param; + std::string name = absl::StrJoin( + {socket_factory.description, test_case.bind_to.description}, "_"); + absl::c_replace_if( + name, [](char c) { return !std::isalnum(c); }, '_'); + return name; +} + +INSTANTIATE_TEST_SUITE_P(PingSockets, Fixture, + ::testing::ValuesIn(AllTestCases()), TestDescription); + +} // namespace } // namespace testing } // namespace gvisor diff --git a/test/syscalls/linux/pipe.cc b/test/syscalls/linux/pipe.cc index 96c454485..0bba86846 100644 --- a/test/syscalls/linux/pipe.cc +++ b/test/syscalls/linux/pipe.cc @@ -14,6 +14,7 @@ #include <fcntl.h> /* Obtain O_* constant definitions */ #include <linux/magic.h> +#include <signal.h> #include <sys/ioctl.h> #include <sys/statfs.h> #include <sys/uio.h> @@ -29,6 +30,7 @@ #include "test/util/file_descriptor.h" #include "test/util/fs_util.h" #include "test/util/posix_error.h" +#include "test/util/signal_util.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" #include "test/util/thread_util.h" @@ -44,6 +46,29 @@ constexpr int kTestValue = 0x12345678; // Used for synchronization in race tests. const absl::Duration syncDelay = absl::Seconds(2); +std::atomic<int> global_num_signals_received = 0; +void SigRecordingHandler(int signum, siginfo_t* siginfo, + void* unused_ucontext) { + global_num_signals_received++; +} + +PosixErrorOr<Cleanup> RegisterSignalHandler(int signum) { + global_num_signals_received = 0; + struct sigaction handler; + handler.sa_sigaction = SigRecordingHandler; + sigemptyset(&handler.sa_mask); + handler.sa_flags = SA_SIGINFO; + return ScopedSigaction(signum, handler); +} + +void WaitForSignalDelivery(absl::Duration timeout, int max_expected) { + absl::Time wait_start = absl::Now(); + while (global_num_signals_received < max_expected && + absl::Now() - wait_start < timeout) { + absl::SleepFor(absl::Milliseconds(10)); + } +} + struct PipeCreator { std::string name_; @@ -267,6 +292,9 @@ TEST_P(PipeTest, Seek) { } } +#ifndef ANDROID +// Android does not support preadv or pwritev in r22. + TEST_P(PipeTest, OffsetCalls) { SKIP_IF(!CreateBlocking()); @@ -283,6 +311,8 @@ TEST_P(PipeTest, OffsetCalls) { EXPECT_THAT(pwritev(rfd_.get(), &iov, 1, 0), SyscallFailsWithErrno(ESPIPE)); } +#endif // ANDROID + TEST_P(PipeTest, WriterSideCloses) { SKIP_IF(!CreateBlocking()); @@ -333,10 +363,16 @@ TEST_P(PipeTest, WriterSideClosesReadDataFirst) { TEST_P(PipeTest, ReaderSideCloses) { SKIP_IF(!CreateBlocking()); + const auto signal_cleanup = + ASSERT_NO_ERRNO_AND_VALUE(RegisterSignalHandler(SIGPIPE)); + ASSERT_THAT(close(rfd_.release()), SyscallSucceeds()); int buf = kTestValue; EXPECT_THAT(write(wfd_.get(), &buf, sizeof(buf)), SyscallFailsWithErrno(EPIPE)); + + WaitForSignalDelivery(absl::Seconds(1), 1); + ASSERT_EQ(global_num_signals_received, 1); } TEST_P(PipeTest, CloseTwice) { @@ -355,6 +391,9 @@ TEST_P(PipeTest, CloseTwice) { TEST_P(PipeTest, BlockWriteClosed) { SKIP_IF(!CreateBlocking()); + const auto signal_cleanup = + ASSERT_NO_ERRNO_AND_VALUE(RegisterSignalHandler(SIGPIPE)); + absl::Notification notify; ScopedThread t([this, ¬ify]() { std::vector<char> buf(Size()); @@ -371,6 +410,10 @@ TEST_P(PipeTest, BlockWriteClosed) { notify.WaitForNotification(); ASSERT_THAT(close(rfd_.release()), SyscallSucceeds()); + + WaitForSignalDelivery(absl::Seconds(1), 1); + ASSERT_EQ(global_num_signals_received, 1); + t.Join(); } @@ -379,6 +422,9 @@ TEST_P(PipeTest, BlockWriteClosed) { TEST_P(PipeTest, BlockPartialWriteClosed) { SKIP_IF(!CreateBlocking()); + const auto signal_cleanup = + ASSERT_NO_ERRNO_AND_VALUE(RegisterSignalHandler(SIGPIPE)); + ScopedThread t([this]() { const int pipe_size = Size(); std::vector<char> buf(2 * pipe_size); @@ -396,6 +442,10 @@ TEST_P(PipeTest, BlockPartialWriteClosed) { // Unblock the above. ASSERT_THAT(close(rfd_.release()), SyscallSucceeds()); + + WaitForSignalDelivery(absl::Seconds(1), 2); + ASSERT_EQ(global_num_signals_received, 2); + t.Join(); } diff --git a/test/syscalls/linux/poll.cc b/test/syscalls/linux/poll.cc index 5ce7e8c8d..ccd084244 100644 --- a/test/syscalls/linux/poll.cc +++ b/test/syscalls/linux/poll.cc @@ -116,7 +116,7 @@ void BlockingReadableTest(int16_t mask) { }); notify.WaitForNotification(); - absl::SleepFor(absl::Seconds(1.0)); + absl::SleepFor(absl::Seconds(1)); // Write some data to the pipe. char s[] = "foo\n"; @@ -221,7 +221,7 @@ TEST_F(PollTest, BlockingEventPOLLHUP) { }); notify.WaitForNotification(); - absl::SleepFor(absl::Seconds(1.0)); + absl::SleepFor(absl::Seconds(1)); // Write some data and close the writer fd. fd1.reset(); diff --git a/test/syscalls/linux/prctl.cc b/test/syscalls/linux/prctl.cc index 19a57d353..25b0e63d4 100644 --- a/test/syscalls/linux/prctl.cc +++ b/test/syscalls/linux/prctl.cc @@ -101,11 +101,11 @@ TEST(PrctlTest, NoNewPrivsPreservedAcrossCloneForkAndExecve) { int no_new_privs; ASSERT_THAT(no_new_privs = prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0), SyscallSucceeds()); - ScopedThread([] { + ScopedThread thread = ScopedThread([] { ASSERT_THAT(prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0), SyscallSucceeds()); EXPECT_THAT(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0), SyscallSucceedsWithValue(1)); - ScopedThread([] { + ScopedThread threadInner = ScopedThread([] { EXPECT_THAT(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0), SyscallSucceedsWithValue(1)); // Note that these ASSERT_*s failing will only return from this thread, @@ -129,9 +129,11 @@ TEST(PrctlTest, NoNewPrivsPreservedAcrossCloneForkAndExecve) { EXPECT_THAT(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0), SyscallSucceedsWithValue(1)); }); + threadInner.Join(); EXPECT_THAT(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0), SyscallSucceedsWithValue(1)); }); + thread.Join(); EXPECT_THAT(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0), SyscallSucceedsWithValue(no_new_privs)); } @@ -141,7 +143,7 @@ TEST(PrctlTest, PDeathSig) { // Make the new process' parent a separate thread since the parent death // signal fires when the parent *thread* exits. - ScopedThread([&] { + ScopedThread thread = ScopedThread([&] { child_pid = fork(); TEST_CHECK(child_pid >= 0); if (child_pid == 0) { @@ -172,6 +174,7 @@ TEST(PrctlTest, PDeathSig) { // Suppress the SIGSTOP and detach from the child. ASSERT_THAT(ptrace(PTRACE_DETACH, child_pid, 0, 0), SyscallSucceeds()); }); + thread.Join(); // The child should have been killed by its parent death SIGKILL. int status; diff --git a/test/syscalls/linux/priority.cc b/test/syscalls/linux/priority.cc index 1d9bdfa70..e381248e4 100644 --- a/test/syscalls/linux/priority.cc +++ b/test/syscalls/linux/priority.cc @@ -72,7 +72,8 @@ TEST(SetpriorityTest, Implemented) { // No need to clear errno for setpriority(): // "The setpriority() call returns 0 if there is no error, or -1 if there is" - EXPECT_THAT(setpriority(PRIO_PROCESS, /*who=*/0, /*nice=*/16), + EXPECT_THAT(setpriority(PRIO_PROCESS, /*who=*/0, + /*nice=*/16), // NOLINT(bugprone-argument-comment) SyscallSucceeds()); } @@ -80,7 +81,8 @@ TEST(SetpriorityTest, Implemented) { TEST(Setpriority, InvalidWhich) { SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_NICE))); - EXPECT_THAT(setpriority(/*which=*/3, /*who=*/0, /*nice=*/16), + EXPECT_THAT(setpriority(/*which=*/3, /*who=*/0, + /*nice=*/16), // NOLINT(bugprone-argument-comment) SyscallFailsWithErrno(EINVAL)); } @@ -88,7 +90,8 @@ TEST(Setpriority, InvalidWhich) { TEST(SetpriorityTest, ValidWho) { SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_NICE))); - EXPECT_THAT(setpriority(PRIO_PROCESS, getpid(), /*nice=*/16), + EXPECT_THAT(setpriority(PRIO_PROCESS, getpid(), + /*nice=*/16), // NOLINT(bugprone-argument-comment) SyscallSucceeds()); } @@ -142,22 +145,26 @@ TEST(SetpriorityTest, OutsideRange) { SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_NICE))); // Set niceval > 19 - EXPECT_THAT(setpriority(PRIO_PROCESS, getpid(), /*nice=*/100), + EXPECT_THAT(setpriority(PRIO_PROCESS, getpid(), + /*nice=*/100), // NOLINT(bugprone-argument-comment) SyscallSucceeds()); errno = 0; // Test niceval truncated to 19 EXPECT_THAT(getpriority(PRIO_PROCESS, getpid()), - SyscallSucceedsWithValue(/*maxnice=*/19)); + SyscallSucceedsWithValue( + /*maxnice=*/19)); // NOLINT(bugprone-argument-comment) // Set niceval < -20 - EXPECT_THAT(setpriority(PRIO_PROCESS, getpid(), /*nice=*/-100), + EXPECT_THAT(setpriority(PRIO_PROCESS, getpid(), + /*nice=*/-100), // NOLINT(bugprone-argument-comment) SyscallSucceeds()); errno = 0; // Test niceval truncated to -20 EXPECT_THAT(getpriority(PRIO_PROCESS, getpid()), - SyscallSucceedsWithValue(/*minnice=*/-20)); + SyscallSucceedsWithValue( + /*minnice=*/-20)); // NOLINT(bugprone-argument-comment) } // Process is not found when which=PRIO_PROCESS @@ -167,7 +174,7 @@ TEST(SetpriorityTest, InvalidWho) { // Flaky, but it's tough to avoid a race condition when finding an unused pid EXPECT_THAT(setpriority(PRIO_PROCESS, /*who=*/INT_MAX - 1, - /*nice=*/16), + /*nice=*/16), // NOLINT(bugprone-argument-comment) SyscallFailsWithErrno(ESRCH)); } diff --git a/test/syscalls/linux/proc.cc b/test/syscalls/linux/proc.cc index 24928d876..78aa73edc 100644 --- a/test/syscalls/linux/proc.cc +++ b/test/syscalls/linux/proc.cc @@ -2364,6 +2364,15 @@ TEST(ProcSysKernelHostname, MatchesUname) { EXPECT_EQ(procfs_hostname, hostname); } +TEST(ProcSysVmMaxmapCount, HasNumericValue) { + const std::string val_str = + ASSERT_NO_ERRNO_AND_VALUE(GetContents("/proc/sys/vm/max_map_count")); + int32_t val; + EXPECT_TRUE(absl::SimpleAtoi(val_str, &val)) + << "/proc/sys/vm/max_map_count does not contain a numeric value: " + << val_str; +} + TEST(ProcSysVmMmapMinAddr, HasNumericValue) { const std::string mmap_min_addr_str = ASSERT_NO_ERRNO_AND_VALUE(GetContents("/proc/sys/vm/mmap_min_addr")); diff --git a/test/syscalls/linux/pty.cc b/test/syscalls/linux/pty.cc index 8d15c491e..5ff1f12a0 100644 --- a/test/syscalls/linux/pty.cc +++ b/test/syscalls/linux/pty.cc @@ -40,6 +40,7 @@ #include "test/util/file_descriptor.h" #include "test/util/posix_error.h" #include "test/util/pty_util.h" +#include "test/util/signal_util.h" #include "test/util/test_util.h" #include "test/util/thread_util.h" @@ -387,6 +388,22 @@ PosixErrorOr<size_t> PollAndReadFd(int fd, void* buf, size_t count, } TEST(PtyTrunc, Truncate) { + SKIP_IF(IsRunningWithVFS1()); + + // setsid either puts us in a new session or fails because we're already the + // session leader. Either way, this ensures we're the session leader and have + // no controlling terminal. + ASSERT_THAT(setsid(), AnyOf(SyscallSucceeds(), SyscallFailsWithErrno(EPERM))); + + // Make sure we're ignoring SIGHUP, which will be sent to this process once we + // disconnect the TTY. + struct sigaction sa = {}; + sa.sa_handler = SIG_IGN; + sa.sa_flags = 0; + sigemptyset(&sa.sa_mask); + const Cleanup cleanup = + ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(SIGHUP, sa)); + // Opening PTYs with O_TRUNC shouldn't cause an error, but calls to // (f)truncate should. FileDescriptor master = @@ -395,6 +412,7 @@ TEST(PtyTrunc, Truncate) { std::string spath = absl::StrCat("/dev/pts/", n); FileDescriptor replica = ASSERT_NO_ERRNO_AND_VALUE(Open(spath, O_RDWR | O_NONBLOCK | O_TRUNC)); + ASSERT_THAT(ioctl(replica.get(), TIOCNOTTY), SyscallSucceeds()); EXPECT_THAT(truncate(kMasterPath, 0), SyscallFailsWithErrno(EINVAL)); EXPECT_THAT(truncate(spath.c_str(), 0), SyscallFailsWithErrno(EINVAL)); @@ -464,10 +482,10 @@ TEST(BasicPtyTest, OpenSetsControllingTTY) { SKIP_IF(IsRunningWithVFS1()); // setsid either puts us in a new session or fails because we're already the // session leader. Either way, this ensures we're the session leader. - setsid(); + ASSERT_THAT(setsid(), AnyOf(SyscallSucceeds(), SyscallFailsWithErrno(EPERM))); // Make sure we're ignoring SIGHUP, which will be sent to this process once we - // disconnect they TTY. + // disconnect the TTY. struct sigaction sa = {}; sa.sa_handler = SIG_IGN; sa.sa_flags = 0; @@ -491,7 +509,7 @@ TEST(BasicPtyTest, OpenMasterDoesNotSetsControllingTTY) { SKIP_IF(IsRunningWithVFS1()); // setsid either puts us in a new session or fails because we're already the // session leader. Either way, this ensures we're the session leader. - setsid(); + ASSERT_THAT(setsid(), AnyOf(SyscallSucceeds(), SyscallFailsWithErrno(EPERM))); FileDescriptor master = ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/ptmx", O_RDWR)); // Opening master does not set the controlling TTY, and therefore we are @@ -503,7 +521,7 @@ TEST(BasicPtyTest, OpenNOCTTY) { SKIP_IF(IsRunningWithVFS1()); // setsid either puts us in a new session or fails because we're already the // session leader. Either way, this ensures we're the session leader. - setsid(); + ASSERT_THAT(setsid(), AnyOf(SyscallSucceeds(), SyscallFailsWithErrno(EPERM))); FileDescriptor master = ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/ptmx", O_RDWR)); FileDescriptor replica = ASSERT_NO_ERRNO_AND_VALUE( OpenReplica(master, O_NOCTTY | O_NONBLOCK | O_RDWR)); @@ -1405,7 +1423,7 @@ TEST_F(JobControlTest, ReleaseTTY) { ASSERT_THAT(ioctl(replica_.get(), TIOCSCTTY, 0), SyscallSucceeds()); // Make sure we're ignoring SIGHUP, which will be sent to this process once we - // disconnect they TTY. + // disconnect the TTY. struct sigaction sa = {}; sa.sa_handler = SIG_IGN; sa.sa_flags = 0; @@ -1526,7 +1544,7 @@ TEST_F(JobControlTest, ReleaseTTYSignals) { EXPECT_THAT(setpgid(diff_pgrp_child, diff_pgrp_child), SyscallSucceeds()); // Make sure we're ignoring SIGHUP, which will be sent to this process once we - // disconnect they TTY. + // disconnect the TTY. struct sigaction sighup_sa = {}; sighup_sa.sa_handler = SIG_IGN; sighup_sa.sa_flags = 0; diff --git a/test/syscalls/linux/read.cc b/test/syscalls/linux/read.cc index 7056342d7..7756af24d 100644 --- a/test/syscalls/linux/read.cc +++ b/test/syscalls/linux/read.cc @@ -157,7 +157,8 @@ TEST_F(ReadTest, PartialReadSIGSEGV) { .iov_len = size, }, }; - EXPECT_THAT(preadv(fd.get(), iov, ABSL_ARRAYSIZE(iov), 0), + EXPECT_THAT(lseek(fd.get(), 0, SEEK_SET), SyscallSucceeds()); + EXPECT_THAT(readv(fd.get(), iov, ABSL_ARRAYSIZE(iov)), SyscallSucceedsWithValue(size)); } diff --git a/test/syscalls/linux/rename.cc b/test/syscalls/linux/rename.cc index 76a8da65f..561eed99f 100644 --- a/test/syscalls/linux/rename.cc +++ b/test/syscalls/linux/rename.cc @@ -26,6 +26,8 @@ #include "test/util/temp_path.h" #include "test/util/test_util.h" +using ::testing::AnyOf; + namespace gvisor { namespace testing { @@ -438,6 +440,60 @@ TEST(RenameTest, SysfsDirectoryToSelf) { EXPECT_THAT(rename(path.c_str(), path.c_str()), SyscallSucceeds()); } +#ifndef SYS_renameat2 +#if defined(__x86_64__) +#define SYS_renameat2 316 +#elif defined(__aarch64__) +#define SYS_renameat2 276 +#else +#error "Unknown architecture" +#endif +#endif // SYS_renameat2 + +#ifndef RENAME_NOREPLACE +#define RENAME_NOREPLACE (1 << 0) +#endif // RENAME_NOREPLACE + +int renameat2(int olddirfd, const char* oldpath, int newdirfd, + const char* newpath, unsigned int flags) { + return syscall(SYS_renameat2, olddirfd, oldpath, newdirfd, newpath, flags); +} + +TEST(Renameat2Test, NoReplaceSuccess) { + auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); + std::string const newpath = NewTempAbsPath(); + // renameat2 may fail with ENOSYS (if the syscall is unsupported) or EINVAL + // (if flags are unsupported), or succeed (if RENAME_NOREPLACE is operating + // correctly). + EXPECT_THAT( + renameat2(AT_FDCWD, f.path().c_str(), AT_FDCWD, newpath.c_str(), + RENAME_NOREPLACE), + AnyOf(SyscallFailsWithErrno(AnyOf(ENOSYS, EINVAL)), SyscallSucceeds())); +} + +TEST(Renameat2Test, NoReplaceExisting) { + auto f1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); + auto f2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); + // renameat2 may fail with ENOSYS (if the syscall is unsupported), EINVAL (if + // flags are unsupported), or EEXIST (if RENAME_NOREPLACE is operating + // correctly). + EXPECT_THAT(renameat2(AT_FDCWD, f1.path().c_str(), AT_FDCWD, + f2.path().c_str(), RENAME_NOREPLACE), + SyscallFailsWithErrno(AnyOf(ENOSYS, EINVAL, EEXIST))); +} + +TEST(Renameat2Test, NoReplaceDot) { + auto d1 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + auto d2 = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + // renameat2 may fail with ENOSYS (if the syscall is unsupported), EINVAL (if + // flags are unsupported), or EEXIST (if RENAME_NOREPLACE is operating + // correctly). + EXPECT_THAT( + renameat2(AT_FDCWD, d1.path().c_str(), AT_FDCWD, + absl::StrCat(d2.path(), "/.").c_str(), RENAME_NOREPLACE), + SyscallFailsWithErrno(AnyOf(ENOSYS, EINVAL, EEXIST))); +} + } // namespace } // namespace testing diff --git a/test/syscalls/linux/semaphore.cc b/test/syscalls/linux/semaphore.cc index 2ce8f836c..f72957f89 100644 --- a/test/syscalls/linux/semaphore.cc +++ b/test/syscalls/linux/semaphore.cc @@ -49,6 +49,9 @@ constexpr int kSemAem = 32767; class AutoSem { public: + // Creates a new private semaphore. + AutoSem() : id_(semget(IPC_PRIVATE, 1, 0)) {} + explicit AutoSem(int id) : id_(id) {} ~AutoSem() { if (id_ >= 0) { @@ -101,6 +104,20 @@ TEST(SemaphoreTest, SemGet) { EXPECT_NE(sem3.get(), sem2.get()); } +// Tests system-wide limits for semget. +TEST(SemaphoreTest, SemGetSystemLimits) { + // Disable save so that we don't trigger save/restore too many times. + const DisableSave ds; + + // Exceed number of semaphores per set. + EXPECT_THAT(semget(IPC_PRIVATE, kSemMsl + 1, 0), + SyscallFailsWithErrno(EINVAL)); + + // Exceed system-wide limit for semaphore sets by 1. + AutoSem sems[kSemMni]; + EXPECT_THAT(semget(IPC_PRIVATE, 1, 0), SyscallFailsWithErrno(ENOSPC)); +} + // Tests simple operations that shouldn't block in a single-thread. TEST(SemaphoreTest, SemOpSingleNoBlock) { AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT)); diff --git a/test/syscalls/linux/setgid.cc b/test/syscalls/linux/setgid.cc index ce61bc36d..6278c4fab 100644 --- a/test/syscalls/linux/setgid.cc +++ b/test/syscalls/linux/setgid.cc @@ -115,8 +115,6 @@ class SetgidDirTest : public ::testing::Test { void SetUp() override { original_gid_ = getegid(); - SKIP_IF(IsRunningWithVFS1()); - // If we can't find two usable groups, we're in an unsupporting environment. // Skip the test. PosixErrorOr<std::pair<gid_t, gid_t>> groups = Groups(); @@ -294,8 +292,8 @@ TEST_F(SetgidDirTest, ChownFileClears) { EXPECT_EQ(stats.st_mode & (S_ISUID | S_ISGID), 0); } -// Chowning a file with setgid enabled, but not the group exec bit, does not -// clear the setgid bit. Such files are mandatory locked. +// Chowning a file with setgid enabled, but not the group exec bit, clears the +// setuid bit and not the setgid bit. Such files are mandatory locked. TEST_F(SetgidDirTest, ChownNoExecFileDoesNotClear) { // Set group to G1, create a directory, and enable setgid. auto g1owned = JoinPath(temp_dir_.path(), "g1owned/"); @@ -345,7 +343,6 @@ struct FileModeTestcase { class FileModeTest : public ::testing::TestWithParam<FileModeTestcase> {}; TEST_P(FileModeTest, WriteToFile) { - SKIP_IF(IsRunningWithVFS1()); PosixErrorOr<std::pair<gid_t, gid_t>> groups = Groups(); SKIP_IF(!groups.ok()); @@ -372,7 +369,6 @@ TEST_P(FileModeTest, WriteToFile) { } TEST_P(FileModeTest, TruncateFile) { - SKIP_IF(IsRunningWithVFS1()); PosixErrorOr<std::pair<gid_t, gid_t>> groups = Groups(); SKIP_IF(!groups.ok()); diff --git a/test/syscalls/linux/sigstop.cc b/test/syscalls/linux/sigstop.cc index b2fcedd62..8de03b4dc 100644 --- a/test/syscalls/linux/sigstop.cc +++ b/test/syscalls/linux/sigstop.cc @@ -123,6 +123,55 @@ void SleepIgnoreStopped(absl::Duration d) { } } +TEST(SigstopTest, RestartSyscall) { + pid_t pid; + constexpr absl::Duration kStopDelay = absl::Seconds(5); + constexpr absl::Duration kSleepDelay = absl::Seconds(15); + constexpr absl::Duration kStartupDelay = absl::Seconds(5); + constexpr absl::Duration kErrorDelay = absl::Seconds(3); + + const DisableSave ds; // Timing-related. + + pid = fork(); + if (pid == 0) { + struct timespec ts = {.tv_sec = kSleepDelay / absl::Seconds(1)}; + auto start = absl::Now(); + TEST_CHECK(nanosleep(&ts, nullptr) == 0); + auto finish = absl::Now(); + // Check that time spent stopped is counted as time spent sleeping. + TEST_CHECK(finish - start >= kSleepDelay); + TEST_CHECK(finish - start < kSleepDelay + kErrorDelay); + _exit(kChildMainThreadExitCode); + } + ASSERT_THAT(pid, SyscallSucceeds()); + + // Wait for the child subprocess to start sleeping before stopping it. + absl::SleepFor(kStartupDelay); + ASSERT_THAT(kill(pid, SIGSTOP), SyscallSucceeds()); + int status; + EXPECT_THAT(RetryEINTR(waitpid)(pid, &status, WUNTRACED), + SyscallSucceedsWithValue(pid)); + EXPECT_TRUE(WIFSTOPPED(status)); + EXPECT_EQ(SIGSTOP, WSTOPSIG(status)); + + // Sleep for shorter than the sleep in the child subprocess. + absl::SleepFor(kStopDelay); + ASSERT_THAT(RetryEINTR(waitpid)(pid, &status, WNOHANG), + SyscallSucceedsWithValue(0)); + + // Resume the child. + ASSERT_THAT(kill(pid, SIGCONT), SyscallSucceeds()); + + EXPECT_THAT(RetryEINTR(waitpid)(pid, &status, WCONTINUED), + SyscallSucceedsWithValue(pid)); + EXPECT_TRUE(WIFCONTINUED(status)); + + // Expect it to die. + ASSERT_THAT(RetryEINTR(waitpid)(pid, &status, 0), SyscallSucceeds()); + ASSERT_TRUE(WIFEXITED(status)); + ASSERT_EQ(WEXITSTATUS(status), kChildMainThreadExitCode); +} + void RunChild() { // Start another thread that attempts to call exit_group with a different // error code, in order to verify that SIGSTOP stops this thread as well. diff --git a/test/syscalls/linux/socket_bind_to_device_util.cc b/test/syscalls/linux/socket_bind_to_device_util.cc index f4ee775bd..ce5f63938 100644 --- a/test/syscalls/linux/socket_bind_to_device_util.cc +++ b/test/syscalls/linux/socket_bind_to_device_util.cc @@ -58,8 +58,10 @@ PosixErrorOr<std::unique_ptr<Tunnel>> Tunnel::New(string tunnel_name) { } std::unordered_set<string> GetInterfaceNames() { - struct if_nameindex* interfaces = if_nameindex(); std::unordered_set<string> names; +#ifndef ANDROID + // Android does not support if_nameindex in r22. + struct if_nameindex* interfaces = if_nameindex(); if (interfaces == nullptr) { return names; } @@ -68,6 +70,7 @@ std::unordered_set<string> GetInterfaceNames() { names.insert(interface->if_name); } if_freenameindex(interfaces); +#endif return names; } diff --git a/test/syscalls/linux/socket_inet_loopback.cc b/test/syscalls/linux/socket_inet_loopback.cc index 9a6b089f6..6b369d5b7 100644 --- a/test/syscalls/linux/socket_inet_loopback.cc +++ b/test/syscalls/linux/socket_inet_loopback.cc @@ -368,7 +368,8 @@ TEST_P(SocketInetLoopbackTest, TCPListenShutdown) { TestAddress const& connector = param.connector; constexpr int kBacklog = 2; - constexpr int kFDs = kBacklog + 1; + // See the comment in TCPBacklog for why this isn't kBacklog + 1. + constexpr int kFDs = kBacklog; // Create the listening socket. FileDescriptor listen_fd = ASSERT_NO_ERRNO_AND_VALUE( @@ -454,6 +455,8 @@ TEST_P(SocketInetLoopbackTest, TCPListenClose) { uint16_t const port = ASSERT_NO_ERRNO_AND_VALUE(AddrPort(listener.family(), listen_addr)); + // Connect repeatedly, keeping each connection open. After kBacklog + // connections, we'll start getting EINPROGRESS. sockaddr_storage conn_addr = connector.addr; ASSERT_NO_ERRNO(SetAddrPort(connector.family(), &conn_addr, port)); std::vector<FileDescriptor> clients; @@ -472,6 +475,77 @@ TEST_P(SocketInetLoopbackTest, TCPListenClose) { } } +// Test the protocol state information returned by TCPINFO. +TEST_P(SocketInetLoopbackTest, TCPInfoState) { + auto const& param = GetParam(); + TestAddress const& listener = param.listener; + TestAddress const& connector = param.connector; + + // Create the listening socket. + FileDescriptor const listen_fd = ASSERT_NO_ERRNO_AND_VALUE( + Socket(listener.family(), SOCK_STREAM, IPPROTO_TCP)); + + auto state = [](int fd) -> int { + struct tcp_info opt = {}; + socklen_t optLen = sizeof(opt); + EXPECT_THAT(getsockopt(fd, SOL_TCP, TCP_INFO, &opt, &optLen), + SyscallSucceeds()); + return opt.tcpi_state; + }; + ASSERT_EQ(state(listen_fd.get()), TCP_CLOSE); + + sockaddr_storage listen_addr = listener.addr; + ASSERT_THAT( + bind(listen_fd.get(), AsSockAddr(&listen_addr), listener.addr_len), + SyscallSucceeds()); + ASSERT_EQ(state(listen_fd.get()), TCP_CLOSE); + + ASSERT_THAT(listen(listen_fd.get(), SOMAXCONN), SyscallSucceeds()); + ASSERT_EQ(state(listen_fd.get()), TCP_LISTEN); + + // Get the port bound by the listening socket. + socklen_t addrlen = listener.addr_len; + ASSERT_THAT(getsockname(listen_fd.get(), AsSockAddr(&listen_addr), &addrlen), + SyscallSucceeds()); + uint16_t const port = + ASSERT_NO_ERRNO_AND_VALUE(AddrPort(listener.family(), listen_addr)); + + // Connect to the listening socket. + FileDescriptor conn_fd = ASSERT_NO_ERRNO_AND_VALUE( + Socket(connector.family(), SOCK_STREAM, IPPROTO_TCP)); + sockaddr_storage conn_addr = connector.addr; + ASSERT_NO_ERRNO(SetAddrPort(connector.family(), &conn_addr, port)); + ASSERT_EQ(state(conn_fd.get()), TCP_CLOSE); + ASSERT_THAT(RetryEINTR(connect)(conn_fd.get(), AsSockAddr(&conn_addr), + connector.addr_len), + SyscallSucceeds()); + ASSERT_EQ(state(conn_fd.get()), TCP_ESTABLISHED); + + auto accepted = + ASSERT_NO_ERRNO_AND_VALUE(Accept(listen_fd.get(), nullptr, nullptr)); + ASSERT_EQ(state(accepted.get()), TCP_ESTABLISHED); + + ASSERT_THAT(close(accepted.release()), SyscallSucceeds()); + + struct pollfd pfd = { + .fd = conn_fd.get(), + .events = POLLIN | POLLRDHUP, + }; + constexpr int kTimeout = 10000; + int n = poll(&pfd, 1, kTimeout); + ASSERT_GE(n, 0) << strerror(errno); + ASSERT_EQ(n, 1); + if (IsRunningOnGvisor() && GvisorPlatform() != Platform::kFuchsia) { + // TODO(gvisor.dev/issue/6015): Notify POLLRDHUP on incoming FIN. + ASSERT_EQ(pfd.revents, POLLIN); + } else { + ASSERT_EQ(pfd.revents, POLLIN | POLLRDHUP); + } + + ASSERT_THAT(state(conn_fd.get()), TCP_CLOSE_WAIT); + ASSERT_THAT(close(conn_fd.release()), SyscallSucceeds()); +} + void TestHangupDuringConnect(const TestParam& param, void (*hangup)(FileDescriptor&)) { TestAddress const& listener = param.listener; @@ -537,6 +611,8 @@ TEST_P(SocketInetLoopbackTest, TCPListenShutdownDuringConnect) { void TestListenHangupConnectingRead(const TestParam& param, void (*hangup)(FileDescriptor&)) { + constexpr int kTimeout = 10000; + TestAddress const& listener = param.listener; TestAddress const& connector = param.connector; @@ -566,14 +642,33 @@ void TestListenHangupConnectingRead(const TestParam& param, sockaddr_storage conn_addr = connector.addr; ASSERT_NO_ERRNO(SetAddrPort(connector.family(), &conn_addr, port)); FileDescriptor established_client = ASSERT_NO_ERRNO_AND_VALUE( - Socket(connector.family(), SOCK_STREAM, IPPROTO_TCP)); - ASSERT_THAT(connect(established_client.get(), AsSockAddr(&conn_addr), - connector.addr_len), - SyscallSucceeds()); + Socket(connector.family(), SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP)); + int ret = connect(established_client.get(), AsSockAddr(&conn_addr), + connector.addr_len); + if (ret != 0) { + EXPECT_THAT(ret, SyscallFailsWithErrno(EINPROGRESS)); + } - // Ensure that the accept queue has the completed connection. - constexpr int kTimeout = 10000; + // On some kernels a backlog of 0 means no backlog, while on others it means a + // backlog of 1. See commit c609e6aae4efcf383fe86b195d1b060befcb3666 for more + // explanation. + // + // If we timeout connecting to loopback, we're on a kernel with no backlog. pollfd pfd = { + .fd = established_client.get(), + .events = POLLIN | POLLOUT, + }; + if (!poll(&pfd, 1, kTimeout)) { + // We're on one of those kernels. It should be impossible to establish the + // connection, so connect will always return EALREADY. + EXPECT_THAT(connect(established_client.get(), AsSockAddr(&conn_addr), + connector.addr_len), + SyscallFailsWithErrno(EALREADY)); + return; + } + + // Ensure that the accept queue has the completed connection. + pfd = { .fd = listen_fd.get(), .events = POLLIN, }; @@ -583,8 +678,8 @@ void TestListenHangupConnectingRead(const TestParam& param, FileDescriptor connecting_client = ASSERT_NO_ERRNO_AND_VALUE( Socket(connector.family(), SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP)); // Keep the last client in connecting state. - int ret = connect(connecting_client.get(), AsSockAddr(&conn_addr), - connector.addr_len); + ret = connect(connecting_client.get(), AsSockAddr(&conn_addr), + connector.addr_len); if (ret != 0) { EXPECT_THAT(ret, SyscallFailsWithErrno(EINPROGRESS)); } @@ -621,6 +716,78 @@ TEST_P(SocketInetLoopbackTest, TCPListenShutdownConnectingRead) { }); } +// Test close of a non-blocking connecting socket. +TEST_P(SocketInetLoopbackTest, TCPNonBlockingConnectClose) { + TestParam const& param = GetParam(); + TestAddress const& listener = param.listener; + TestAddress const& connector = param.connector; + + // Create the listening socket. + FileDescriptor listen_fd = ASSERT_NO_ERRNO_AND_VALUE( + Socket(listener.family(), SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP)); + sockaddr_storage listen_addr = listener.addr; + ASSERT_THAT( + bind(listen_fd.get(), AsSockAddr(&listen_addr), listener.addr_len), + SyscallSucceeds()); + ASSERT_THAT(listen(listen_fd.get(), 0), SyscallSucceeds()); + + // Get the port bound by the listening socket. + socklen_t addrlen = listener.addr_len; + ASSERT_THAT(getsockname(listen_fd.get(), AsSockAddr(&listen_addr), &addrlen), + SyscallSucceeds()); + ASSERT_EQ(addrlen, listener.addr_len); + uint16_t const port = + ASSERT_NO_ERRNO_AND_VALUE(AddrPort(listener.family(), listen_addr)); + + sockaddr_storage conn_addr = connector.addr; + ASSERT_NO_ERRNO(SetAddrPort(connector.family(), &conn_addr, port)); + + // Try many iterations to catch a race with socket close and handshake + // completion. + for (int i = 0; i < 1000; ++i) { + FileDescriptor client = ASSERT_NO_ERRNO_AND_VALUE( + Socket(connector.family(), SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP)); + ASSERT_THAT( + connect(client.get(), AsSockAddr(&conn_addr), connector.addr_len), + SyscallFailsWithErrno(EINPROGRESS)); + ASSERT_THAT(close(client.release()), SyscallSucceeds()); + + // Accept any connections and check if they were closed from the peer. Not + // all client connects would result in an acceptable connection as the + // client handshake might never complete if the socket close was processed + // sooner than the non-blocking connect OR the accept queue is full. We are + // only interested in the case where we do have an acceptable completed + // connection. The accept is non-blocking here, which means that at the time + // of listener close (after the loop ends), we could still have a completed + // connection (from connect of any previous iteration) in the accept queue. + // The listener close would clean up the accept queue. + int accepted_fd; + ASSERT_THAT(accepted_fd = accept(listen_fd.get(), nullptr, nullptr), + AnyOf(SyscallSucceeds(), SyscallFailsWithErrno(EWOULDBLOCK))); + if (accepted_fd < 0) { + continue; + } + FileDescriptor accepted(accepted_fd); + struct pollfd pfd = { + .fd = accepted.get(), + .events = POLLIN | POLLRDHUP, + }; + // Use a large timeout to accomodate for retransmitted FINs. + constexpr int kTimeout = 30000; + int n = poll(&pfd, 1, kTimeout); + ASSERT_GE(n, 0) << strerror(errno); + ASSERT_EQ(n, 1); + + if (IsRunningOnGvisor() && GvisorPlatform() != Platform::kFuchsia) { + // TODO(gvisor.dev/issue/6015): Notify POLLRDHUP on incoming FIN. + ASSERT_EQ(pfd.revents, POLLIN); + } else { + ASSERT_EQ(pfd.revents, POLLIN | POLLRDHUP); + } + ASSERT_THAT(close(accepted.release()), SyscallSucceeds()); + } +} + // TODO(b/157236388): Remove once bug is fixed. Test fails w/ // random save as established connections which can't be delivered to the accept // queue because the queue is full are not correctly delivered after restore @@ -652,7 +819,8 @@ TEST_P(SocketInetLoopbackTest, TCPAcceptBacklogSizes) { if (backlog < 0) { expected_accepts = 1024; } else { - expected_accepts = backlog + 1; + // See the comment in TCPBacklog for why this isn't backlog + 1. + expected_accepts = backlog; } for (int i = 0; i < expected_accepts; i++) { SCOPED_TRACE(absl::StrCat("i=", i)); @@ -753,7 +921,11 @@ TEST_P(SocketInetLoopbackTest, TCPBacklog) { // enqueuing established connections to the accept queue, newer SYNs could // still be replied to causing those client connections would be accepted as // we start dequeuing the queue. - ASSERT_GE(accepted_conns, kBacklogSize + 1); + // + // On some kernels this can value can be off by one, so we don't add 1 to + // kBacklogSize. See commit c609e6aae4efcf383fe86b195d1b060befcb3666 for more + // explanation. + ASSERT_GE(accepted_conns, kBacklogSize); ASSERT_GE(client_conns, accepted_conns); } @@ -788,7 +960,9 @@ TEST_P(SocketInetLoopbackTest, TCPBacklogAcceptAll) { // Fill up the accept queue and trigger more client connections which would be // waiting to be accepted. - std::array<FileDescriptor, kBacklog + 1> established_clients; + // + // See the comment in TCPBacklog for why this isn't backlog + 1. + std::array<FileDescriptor, kBacklog> established_clients; for (auto& fd : established_clients) { fd = ASSERT_NO_ERRNO_AND_VALUE( Socket(connector.family(), SOCK_STREAM, IPPROTO_TCP)); diff --git a/test/syscalls/linux/socket_ip_tcp_generic.cc b/test/syscalls/linux/socket_ip_tcp_generic.cc index 59b56dc1a..2f5743cda 100644 --- a/test/syscalls/linux/socket_ip_tcp_generic.cc +++ b/test/syscalls/linux/socket_ip_tcp_generic.cc @@ -1155,7 +1155,7 @@ TEST_P(TCPSocketPairTest, IpMulticastLoopDefault) { TEST_P(TCPSocketPairTest, TCPResetDuringClose) { DisableSave ds; // Too many syscalls. - constexpr int kThreadCount = 1000; + constexpr int kThreadCount = 100; std::unique_ptr<ScopedThread> instances[kThreadCount]; for (int i = 0; i < kThreadCount; i++) { instances[i] = absl::make_unique<ScopedThread>([&]() { diff --git a/test/syscalls/linux/socket_ipv6_udp_unbound_external_networking.cc b/test/syscalls/linux/socket_ipv6_udp_unbound_external_networking.cc index 8390f7c3b..09f070797 100644 --- a/test/syscalls/linux/socket_ipv6_udp_unbound_external_networking.cc +++ b/test/syscalls/linux/socket_ipv6_udp_unbound_external_networking.cc @@ -38,8 +38,8 @@ TEST_P(IPv6UDPUnboundExternalNetworkingSocketTest, TestJoinLeaveMulticast) { ipv6_mreq group_req = { .ipv6mr_multiaddr = reinterpret_cast<sockaddr_in6*>(&multicast_addr.addr)->sin6_addr, - .ipv6mr_interface = - (unsigned int)ASSERT_NO_ERRNO_AND_VALUE(InterfaceIndex("lo")), + .ipv6mr_interface = static_cast<decltype(ipv6_mreq::ipv6mr_interface)>( + ASSERT_NO_ERRNO_AND_VALUE(InterfaceIndex("lo"))), }; ASSERT_THAT(setsockopt(receiver->get(), IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &group_req, sizeof(group_req)), diff --git a/test/syscalls/linux/socket_test_util.cc b/test/syscalls/linux/socket_test_util.cc index 9e3a129cf..83c33ec8d 100644 --- a/test/syscalls/linux/socket_test_util.cc +++ b/test/syscalls/linux/socket_test_util.cc @@ -15,6 +15,7 @@ #include "test/syscalls/linux/socket_test_util.h" #include <arpa/inet.h> +#include <netinet/in.h> #include <poll.h> #include <sys/socket.h> @@ -84,7 +85,8 @@ Creator<SocketPair> AcceptBindSocketPairCreator(bool abstract, int domain, RETURN_ERROR_IF_SYSCALL_FAIL( bind(bound, AsSockAddr(&bind_addr), sizeof(bind_addr))); MaybeSave(); // Successful bind. - RETURN_ERROR_IF_SYSCALL_FAIL(listen(bound, /* backlog = */ 5)); + RETURN_ERROR_IF_SYSCALL_FAIL( + listen(bound, /* backlog = */ 5)); // NOLINT(bugprone-argument-comment) MaybeSave(); // Successful listen. int connected; @@ -315,7 +317,8 @@ PosixErrorOr<T> BindIP(int fd, bool dual_stack) { template <typename T> PosixErrorOr<T> TCPBindAndListen(int fd, bool dual_stack) { ASSIGN_OR_RETURN_ERRNO(T addr, BindIP<T>(fd, dual_stack)); - RETURN_ERROR_IF_SYSCALL_FAIL(listen(fd, /* backlog = */ 5)); + RETURN_ERROR_IF_SYSCALL_FAIL( + listen(fd, /* backlog = */ 5)); // NOLINT(bugprone-argument-comment) return addr; } @@ -798,84 +801,82 @@ TestAddress TestAddress::WithPort(uint16_t port) const { return addr; } -TestAddress V4Any() { - TestAddress t("V4Any"); - t.addr.ss_family = AF_INET; - t.addr_len = sizeof(sockaddr_in); - reinterpret_cast<sockaddr_in*>(&t.addr)->sin_addr.s_addr = htonl(INADDR_ANY); - return t; -} +namespace { -TestAddress V4Loopback() { - TestAddress t("V4Loopback"); +TestAddress V4Addr(std::string description, in_addr_t addr) { + TestAddress t(std::move(description)); t.addr.ss_family = AF_INET; t.addr_len = sizeof(sockaddr_in); - reinterpret_cast<sockaddr_in*>(&t.addr)->sin_addr.s_addr = - htonl(INADDR_LOOPBACK); + reinterpret_cast<sockaddr_in*>(&t.addr)->sin_addr.s_addr = addr; return t; } -TestAddress V4MappedAny() { - TestAddress t("V4MappedAny"); +TestAddress V6Addr(std::string description, const in6_addr& addr) { + TestAddress t(std::move(description)); t.addr.ss_family = AF_INET6; t.addr_len = sizeof(sockaddr_in6); - inet_pton(AF_INET6, "::ffff:0.0.0.0", - reinterpret_cast<sockaddr_in6*>(&t.addr)->sin6_addr.s6_addr); + reinterpret_cast<sockaddr_in6*>(&t.addr)->sin6_addr = addr; return t; } +} // namespace + +TestAddress V4AddrStr(std::string description, const char* addr) { + in_addr_t s_addr; + inet_pton(AF_INET, addr, &s_addr); + return V4Addr(description, s_addr); +} + +TestAddress V6AddrStr(std::string description, const char* addr) { + struct in6_addr s_addr; + inet_pton(AF_INET6, addr, &s_addr); + return V6Addr(description, s_addr); +} + +TestAddress V4Any() { return V4Addr("V4Any", htonl(INADDR_ANY)); } + +TestAddress V4Broadcast() { + return V4Addr("V4Broadcast", htonl(INADDR_BROADCAST)); +} + +TestAddress V4Loopback() { + return V4Addr("V4Loopback", htonl(INADDR_LOOPBACK)); +} + +TestAddress V4LoopbackSubnetBroadcast() { + return V4AddrStr("V4LoopbackSubnetBroadcast", "127.255.255.255"); +} + +TestAddress V4MappedAny() { return V6AddrStr("V4MappedAny", "::ffff:0.0.0.0"); } + TestAddress V4MappedLoopback() { - TestAddress t("V4MappedLoopback"); - t.addr.ss_family = AF_INET6; - t.addr_len = sizeof(sockaddr_in6); - inet_pton(AF_INET6, "::ffff:127.0.0.1", - reinterpret_cast<sockaddr_in6*>(&t.addr)->sin6_addr.s6_addr); - return t; + return V6AddrStr("V4MappedLoopback", "::ffff:127.0.0.1"); } TestAddress V4Multicast() { - TestAddress t("V4Multicast"); - t.addr.ss_family = AF_INET; - t.addr_len = sizeof(sockaddr_in); - reinterpret_cast<sockaddr_in*>(&t.addr)->sin_addr.s_addr = - inet_addr(kMulticastAddress); - return t; + return V4Addr("V4Multicast", inet_addr(kMulticastAddress)); } -TestAddress V4Broadcast() { - TestAddress t("V4Broadcast"); - t.addr.ss_family = AF_INET; - t.addr_len = sizeof(sockaddr_in); - reinterpret_cast<sockaddr_in*>(&t.addr)->sin_addr.s_addr = - htonl(INADDR_BROADCAST); - return t; +TestAddress V4MulticastAllHosts() { + return V4Addr("V4MulticastAllHosts", htonl(INADDR_ALLHOSTS_GROUP)); } -TestAddress V6Any() { - TestAddress t("V6Any"); - t.addr.ss_family = AF_INET6; - t.addr_len = sizeof(sockaddr_in6); - reinterpret_cast<sockaddr_in6*>(&t.addr)->sin6_addr = in6addr_any; - return t; +TestAddress V6Any() { return V6Addr("V6Any", in6addr_any); } + +TestAddress V6Loopback() { return V6Addr("V6Loopback", in6addr_loopback); } + +TestAddress V6Multicast() { return V6AddrStr("V6Multicast", "ff05::1234"); } + +TestAddress V6MulticastInterfaceLocalAllNodes() { + return V6AddrStr("V6MulticastInterfaceLocalAllNodes", "ff01::1"); } -TestAddress V6Loopback() { - TestAddress t("V6Loopback"); - t.addr.ss_family = AF_INET6; - t.addr_len = sizeof(sockaddr_in6); - reinterpret_cast<sockaddr_in6*>(&t.addr)->sin6_addr = in6addr_loopback; - return t; +TestAddress V6MulticastLinkLocalAllNodes() { + return V6AddrStr("V6MulticastLinkLocalAllNodes", "ff02::1"); } -TestAddress V6Multicast() { - TestAddress t("V6Multicast"); - t.addr.ss_family = AF_INET6; - t.addr_len = sizeof(sockaddr_in6); - EXPECT_EQ( - 1, - inet_pton(AF_INET6, "ff05::1234", - reinterpret_cast<sockaddr_in6*>(&t.addr)->sin6_addr.s6_addr)); - return t; +TestAddress V6MulticastLinkLocalAllRouters() { + return V6AddrStr("V6MulticastLinkLocalAllRouters", "ff02::2"); } // Checksum computes the internet checksum of a buffer. diff --git a/test/syscalls/linux/socket_test_util.h b/test/syscalls/linux/socket_test_util.h index f7ba90130..76dc090e0 100644 --- a/test/syscalls/linux/socket_test_util.h +++ b/test/syscalls/linux/socket_test_util.h @@ -499,15 +499,45 @@ struct TestAddress { constexpr char kMulticastAddress[] = "224.0.2.1"; constexpr char kBroadcastAddress[] = "255.255.255.255"; +// Returns a TestAddress with `addr` parsed as an IPv4 address described by +// `description`. +TestAddress V4AddrStr(std::string description, const char* addr); +// Returns a TestAddress with `addr` parsed as an IPv6 address described by +// `description`. +TestAddress V6AddrStr(std::string description, const char* addr); + +// Returns a TestAddress for the IPv4 any address. TestAddress V4Any(); +// Returns a TestAddress for the IPv4 limited broadcast address. TestAddress V4Broadcast(); +// Returns a TestAddress for the IPv4 loopback address. TestAddress V4Loopback(); +// Returns a TestAddress for the subnet broadcast of the IPv4 loopback address. +TestAddress V4LoopbackSubnetBroadcast(); +// Returns a TestAddress for the IPv4-mapped IPv6 any address. TestAddress V4MappedAny(); +// Returns a TestAddress for the IPv4-mapped IPv6 loopback address. TestAddress V4MappedLoopback(); +// Returns a TestAddress for a IPv4 multicast address. TestAddress V4Multicast(); +// Returns a TestAddress for the IPv4 all-hosts multicast group address. +TestAddress V4MulticastAllHosts(); + +// Returns a TestAddress for the IPv6 any address. TestAddress V6Any(); +// Returns a TestAddress for the IPv6 loopback address. TestAddress V6Loopback(); +// Returns a TestAddress for a IPv6 multicast address. TestAddress V6Multicast(); +// Returns a TestAddress for the IPv6 interface-local all-nodes multicast group +// address. +TestAddress V6MulticastInterfaceLocalAllNodes(); +// Returns a TestAddress for the IPv6 link-local all-nodes multicast group +// address. +TestAddress V6MulticastLinkLocalAllNodes(); +// Returns a TestAddress for the IPv6 link-local all-routers multicast group +// address. +TestAddress V6MulticastLinkLocalAllRouters(); // Compute the internet checksum of an IP header. uint16_t IPChecksum(struct iphdr ip); diff --git a/test/syscalls/linux/timers.cc b/test/syscalls/linux/timers.cc index 93a98adb1..bc12dd4af 100644 --- a/test/syscalls/linux/timers.cc +++ b/test/syscalls/linux/timers.cc @@ -26,6 +26,7 @@ #include "absl/flags/flag.h" #include "absl/time/clock.h" #include "absl/time/time.h" +#include "benchmark/benchmark.h" #include "test/util/cleanup.h" #include "test/util/logging.h" #include "test/util/multiprocess_util.h" @@ -92,6 +93,8 @@ TEST(TimerTest, ProcessKilledOnCPUSoftLimit) { TEST_PCHECK(setrlimit(RLIMIT_CPU, &cpu_limits) == 0); MaybeSave(); for (;;) { + int x = 0; + benchmark::DoNotOptimize(x); // Don't optimize this loop away. } } ASSERT_THAT(pid, SyscallSucceeds()); @@ -151,6 +154,8 @@ TEST(TimerTest, ProcessPingedRepeatedlyAfterCPUSoftLimit) { TEST_PCHECK(setrlimit(RLIMIT_CPU, &cpu_limits) == 0); MaybeSave(); for (;;) { + int x = 0; + benchmark::DoNotOptimize(x); // Don't optimize this loop away. } } ASSERT_THAT(pid, SyscallSucceeds()); @@ -197,6 +202,8 @@ TEST(TimerTest, ProcessKilledOnCPUHardLimit) { TEST_PCHECK(setrlimit(RLIMIT_CPU, &cpu_limits) == 0); MaybeSave(); for (;;) { + int x = 0; + benchmark::DoNotOptimize(x); // Don't optimize this loop away. } } ASSERT_THAT(pid, SyscallSucceeds()); diff --git a/test/syscalls/linux/udp_socket.cc b/test/syscalls/linux/udp_socket.cc index 29e174f71..2b687c198 100644 --- a/test/syscalls/linux/udp_socket.cc +++ b/test/syscalls/linux/udp_socket.cc @@ -791,14 +791,14 @@ TEST_P(UdpSocketTest, RecvErrorConnRefused) { iov.iov_len = kBufLen; size_t control_buf_len = CMSG_SPACE(sizeof(sock_extended_err) + addrlen_); - char* control_buf = static_cast<char*>(calloc(1, control_buf_len)); + std::vector<char> control_buf(control_buf_len); struct sockaddr_storage remote; memset(&remote, 0, sizeof(remote)); struct msghdr msg = {}; msg.msg_iov = &iov; msg.msg_iovlen = 1; msg.msg_flags = 0; - msg.msg_control = control_buf; + msg.msg_control = control_buf.data(); msg.msg_controllen = control_buf_len; msg.msg_name = reinterpret_cast<void*>(&remote); msg.msg_namelen = addrlen_; diff --git a/test/syscalls/linux/uidgid.cc b/test/syscalls/linux/uidgid.cc index 4139a18d8..d95a3e010 100644 --- a/test/syscalls/linux/uidgid.cc +++ b/test/syscalls/linux/uidgid.cc @@ -170,7 +170,9 @@ TEST(UidGidRootTest, SetgidNotFromThreadGroupLeader) { const gid_t gid = absl::GetFlag(FLAGS_scratch_gid1); // NOTE(b/64676707): Do setgid in a separate thread so that we can test if // info.si_pid is set correctly. - ScopedThread([gid] { ASSERT_THAT(setgid(gid), SyscallSucceeds()); }); + ScopedThread thread = + ScopedThread([gid] { ASSERT_THAT(setgid(gid), SyscallSucceeds()); }); + thread.Join(); EXPECT_NO_ERRNO(CheckGIDs(gid, gid, gid)); #pragma pop_macro("allow_setgid") diff --git a/test/syscalls/linux/uname.cc b/test/syscalls/linux/uname.cc index 759ea4f53..c52abef5c 100644 --- a/test/syscalls/linux/uname.cc +++ b/test/syscalls/linux/uname.cc @@ -88,7 +88,7 @@ TEST(UnameTest, UnshareUTS) { struct utsname init; ASSERT_THAT(uname(&init), SyscallSucceeds()); - ScopedThread([&]() { + ScopedThread thread = ScopedThread([&]() { EXPECT_THAT(unshare(CLONE_NEWUTS), SyscallSucceeds()); constexpr char kHostname[] = "wubbalubba"; @@ -97,6 +97,7 @@ TEST(UnameTest, UnshareUTS) { char hostname[65]; EXPECT_THAT(gethostname(hostname, sizeof(hostname)), SyscallSucceeds()); }); + thread.Join(); struct utsname after; EXPECT_THAT(uname(&after), SyscallSucceeds()); diff --git a/test/syscalls/linux/verity_getdents.cc b/test/syscalls/linux/verity_getdents.cc new file mode 100644 index 000000000..093595dd3 --- /dev/null +++ b/test/syscalls/linux/verity_getdents.cc @@ -0,0 +1,95 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include <dirent.h> +#include <stdint.h> +#include <stdlib.h> +#include <sys/mount.h> +#include <sys/syscall.h> + +#include <string> +#include <vector> + +#include "gmock/gmock.h" +#include "gtest/gtest.h" +#include "test/util/capability_util.h" +#include "test/util/fs_util.h" +#include "test/util/temp_path.h" +#include "test/util/test_util.h" +#include "test/util/verity_util.h" + +namespace gvisor { +namespace testing { + +namespace { + +class GetDentsTest : public ::testing::Test { + protected: + void SetUp() override { + // Verity is implemented in VFS2. + SKIP_IF(IsRunningWithVFS1()); + + SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_ADMIN))); + // Mount a tmpfs file system, to be wrapped by a verity fs. + tmpfs_dir_ = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + ASSERT_THAT(mount("", tmpfs_dir_.path().c_str(), "tmpfs", 0, ""), + SyscallSucceeds()); + + // Create a new file in the tmpfs mount. + file_ = ASSERT_NO_ERRNO_AND_VALUE( + TempPath::CreateFileWith(tmpfs_dir_.path(), kContents, 0777)); + filename_ = Basename(file_.path()); + } + + TempPath tmpfs_dir_; + TempPath file_; + std::string filename_; +}; + +TEST_F(GetDentsTest, GetDents) { + std::string verity_dir = + ASSERT_NO_ERRNO_AND_VALUE(MountVerity(tmpfs_dir_.path(), filename_)); + + std::vector<std::string> expect = {".", "..", filename_}; + EXPECT_NO_ERRNO(DirContains(verity_dir, expect, /*exclude=*/{})); +} + +TEST_F(GetDentsTest, Deleted) { + std::string verity_dir = + ASSERT_NO_ERRNO_AND_VALUE(MountVerity(tmpfs_dir_.path(), filename_)); + + EXPECT_THAT(unlink(JoinPath(tmpfs_dir_.path(), filename_).c_str()), + SyscallSucceeds()); + + EXPECT_THAT(DirContains(verity_dir, /*expect=*/{}, /*exclude=*/{}), + PosixErrorIs(EIO, ::testing::_)); +} + +TEST_F(GetDentsTest, Renamed) { + std::string verity_dir = + ASSERT_NO_ERRNO_AND_VALUE(MountVerity(tmpfs_dir_.path(), filename_)); + + std::string new_file_name = "renamed-" + filename_; + EXPECT_THAT(rename(JoinPath(tmpfs_dir_.path(), filename_).c_str(), + JoinPath(tmpfs_dir_.path(), new_file_name).c_str()), + SyscallSucceeds()); + + EXPECT_THAT(DirContains(verity_dir, /*expect=*/{}, /*exclude=*/{}), + PosixErrorIs(EIO, ::testing::_)); +} + +} // namespace + +} // namespace testing +} // namespace gvisor diff --git a/test/syscalls/linux/verity_ioctl.cc b/test/syscalls/linux/verity_ioctl.cc index 822e16f3c..be91b23d0 100644 --- a/test/syscalls/linux/verity_ioctl.cc +++ b/test/syscalls/linux/verity_ioctl.cc @@ -28,40 +28,13 @@ #include "test/util/mount_util.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" +#include "test/util/verity_util.h" namespace gvisor { namespace testing { namespace { -#ifndef FS_IOC_ENABLE_VERITY -#define FS_IOC_ENABLE_VERITY 1082156677 -#endif - -#ifndef FS_IOC_MEASURE_VERITY -#define FS_IOC_MEASURE_VERITY 3221513862 -#endif - -#ifndef FS_VERITY_FL -#define FS_VERITY_FL 1048576 -#endif - -#ifndef FS_IOC_GETFLAGS -#define FS_IOC_GETFLAGS 2148034049 -#endif - -struct fsverity_digest { - __u16 digest_algorithm; - __u16 digest_size; /* input/output */ - __u8 digest[]; -}; - -constexpr int kMaxDigestSize = 64; -constexpr int kDefaultDigestSize = 32; -constexpr char kContents[] = "foobarbaz"; -constexpr char kMerklePrefix[] = ".merkle.verity."; -constexpr char kMerkleRootPrefix[] = ".merkleroot.verity."; - class IoctlTest : public ::testing::Test { protected: void SetUp() override { @@ -85,80 +58,6 @@ class IoctlTest : public ::testing::Test { std::string filename_; }; -// Provide a function to convert bytes to hex string, since -// absl::BytesToHexString does not seem to be compatible with golang -// hex.DecodeString used in verity due to zero-padding. -std::string BytesToHexString(uint8_t bytes[], int size) { - std::stringstream ss; - ss << std::hex; - for (int i = 0; i < size; ++i) { - ss << std::setw(2) << std::setfill('0') << static_cast<int>(bytes[i]); - } - return ss.str(); -} - -std::string MerklePath(absl::string_view path) { - return JoinPath(Dirname(path), - std::string(kMerklePrefix) + std::string(Basename(path))); -} - -std::string MerkleRootPath(absl::string_view path) { - return JoinPath(Dirname(path), - std::string(kMerkleRootPrefix) + std::string(Basename(path))); -} - -// Flip a random bit in the file represented by fd. -PosixError FlipRandomBit(int fd, int size) { - // Generate a random offset in the file. - srand(time(nullptr)); - unsigned int seed = 0; - int random_offset = rand_r(&seed) % size; - - // Read a random byte and flip a bit in it. - char buf[1]; - RETURN_ERROR_IF_SYSCALL_FAIL(PreadFd(fd, buf, 1, random_offset)); - buf[0] ^= 1; - RETURN_ERROR_IF_SYSCALL_FAIL(PwriteFd(fd, buf, 1, random_offset)); - return NoError(); -} - -// Mount a verity on the tmpfs and enable both the file and the direcotry. Then -// mount a new verity with measured root hash. -PosixErrorOr<std::string> MountVerity(std::string tmpfs_dir, - std::string filename) { - // Mount a verity fs on the existing tmpfs mount. - std::string mount_opts = "lower_path=" + tmpfs_dir; - ASSIGN_OR_RETURN_ERRNO(TempPath verity_dir, TempPath::CreateDir()); - RETURN_ERROR_IF_SYSCALL_FAIL( - mount("", verity_dir.path().c_str(), "verity", 0, mount_opts.c_str())); - - // Enable both the file and the directory. - ASSIGN_OR_RETURN_ERRNO( - auto fd, Open(JoinPath(verity_dir.path(), filename), O_RDONLY, 0777)); - RETURN_ERROR_IF_SYSCALL_FAIL(ioctl(fd.get(), FS_IOC_ENABLE_VERITY)); - ASSIGN_OR_RETURN_ERRNO(auto dir_fd, Open(verity_dir.path(), O_RDONLY, 0777)); - RETURN_ERROR_IF_SYSCALL_FAIL(ioctl(dir_fd.get(), FS_IOC_ENABLE_VERITY)); - - // Measure the root hash. - uint8_t digest_array[sizeof(struct fsverity_digest) + kMaxDigestSize] = {0}; - struct fsverity_digest* digest = - reinterpret_cast<struct fsverity_digest*>(digest_array); - digest->digest_size = kMaxDigestSize; - RETURN_ERROR_IF_SYSCALL_FAIL( - ioctl(dir_fd.get(), FS_IOC_MEASURE_VERITY, digest)); - - // Mount a verity fs with specified root hash. - mount_opts += - ",root_hash=" + BytesToHexString(digest->digest, digest->digest_size); - ASSIGN_OR_RETURN_ERRNO(TempPath verity_with_hash_dir, TempPath::CreateDir()); - RETURN_ERROR_IF_SYSCALL_FAIL(mount("", verity_with_hash_dir.path().c_str(), - "verity", 0, mount_opts.c_str())); - // Verity directories should not be deleted. Release the TempPath objects to - // prevent those directories from being deleted by the destructor. - verity_dir.release(); - return verity_with_hash_dir.release(); -} - TEST_F(IoctlTest, Enable) { // Mount a verity fs on the existing tmpfs mount. std::string mount_opts = "lower_path=" + tmpfs_dir_.path(); diff --git a/test/syscalls/linux/verity_mmap.cc b/test/syscalls/linux/verity_mmap.cc new file mode 100644 index 000000000..dde74cc91 --- /dev/null +++ b/test/syscalls/linux/verity_mmap.cc @@ -0,0 +1,158 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include <stdint.h> +#include <stdlib.h> +#include <sys/mman.h> +#include <sys/mount.h> + +#include <string> + +#include "gmock/gmock.h" +#include "gtest/gtest.h" +#include "test/util/capability_util.h" +#include "test/util/fs_util.h" +#include "test/util/memory_util.h" +#include "test/util/temp_path.h" +#include "test/util/test_util.h" +#include "test/util/verity_util.h" + +namespace gvisor { +namespace testing { + +namespace { + +class MmapTest : public ::testing::Test { + protected: + void SetUp() override { + // Verity is implemented in VFS2. + SKIP_IF(IsRunningWithVFS1()); + + SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_ADMIN))); + // Mount a tmpfs file system, to be wrapped by a verity fs. + tmpfs_dir_ = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); + ASSERT_THAT(mount("", tmpfs_dir_.path().c_str(), "tmpfs", 0, ""), + SyscallSucceeds()); + + // Create a new file in the tmpfs mount. + file_ = ASSERT_NO_ERRNO_AND_VALUE( + TempPath::CreateFileWith(tmpfs_dir_.path(), kContents, 0777)); + filename_ = Basename(file_.path()); + } + + TempPath tmpfs_dir_; + TempPath file_; + std::string filename_; +}; + +TEST_F(MmapTest, MmapRead) { + std::string verity_dir = + ASSERT_NO_ERRNO_AND_VALUE(MountVerity(tmpfs_dir_.path(), filename_)); + + // Make sure the file can be open and mmapped in the mounted verity fs. + auto const verity_fd = ASSERT_NO_ERRNO_AND_VALUE( + Open(JoinPath(verity_dir, filename_), O_RDONLY, 0777)); + + Mapping const m = + ASSERT_NO_ERRNO_AND_VALUE(Mmap(nullptr, sizeof(kContents) - 1, PROT_READ, + MAP_SHARED, verity_fd.get(), 0)); + EXPECT_THAT(std::string(m.view()), ::testing::StrEq(kContents)); +} + +TEST_F(MmapTest, ModifiedBeforeMmap) { + std::string verity_dir = + ASSERT_NO_ERRNO_AND_VALUE(MountVerity(tmpfs_dir_.path(), filename_)); + + // Modify the file and check verification failure upon mmapping. + auto const fd = ASSERT_NO_ERRNO_AND_VALUE( + Open(JoinPath(tmpfs_dir_.path(), filename_), O_RDWR, 0777)); + ASSERT_NO_ERRNO(FlipRandomBit(fd.get(), sizeof(kContents) - 1)); + + auto const verity_fd = ASSERT_NO_ERRNO_AND_VALUE( + Open(JoinPath(verity_dir, filename_), O_RDONLY, 0777)); + Mapping const m = + ASSERT_NO_ERRNO_AND_VALUE(Mmap(nullptr, sizeof(kContents) - 1, PROT_READ, + MAP_SHARED, verity_fd.get(), 0)); + + // Memory fault is expected when Translate fails. + EXPECT_EXIT(std::string(m.view()), ::testing::KilledBySignal(SIGSEGV), ""); +} + +TEST_F(MmapTest, ModifiedAfterMmap) { + std::string verity_dir = + ASSERT_NO_ERRNO_AND_VALUE(MountVerity(tmpfs_dir_.path(), filename_)); + + auto const verity_fd = ASSERT_NO_ERRNO_AND_VALUE( + Open(JoinPath(verity_dir, filename_), O_RDONLY, 0777)); + Mapping const m = + ASSERT_NO_ERRNO_AND_VALUE(Mmap(nullptr, sizeof(kContents) - 1, PROT_READ, + MAP_SHARED, verity_fd.get(), 0)); + + // Modify the file after mapping and check verification failure upon mmapping. + auto const fd = ASSERT_NO_ERRNO_AND_VALUE( + Open(JoinPath(tmpfs_dir_.path(), filename_), O_RDWR, 0777)); + ASSERT_NO_ERRNO(FlipRandomBit(fd.get(), sizeof(kContents) - 1)); + + // Memory fault is expected when Translate fails. + EXPECT_EXIT(std::string(m.view()), ::testing::KilledBySignal(SIGSEGV), ""); +} + +class MmapParamTest + : public MmapTest, + public ::testing::WithParamInterface<std::tuple<int, int>> { + protected: + int prot() const { return std::get<0>(GetParam()); } + int flags() const { return std::get<1>(GetParam()); } +}; + +INSTANTIATE_TEST_SUITE_P( + WriteExecNoneSharedPrivate, MmapParamTest, + ::testing::Combine(::testing::ValuesIn({ + PROT_WRITE, + PROT_EXEC, + PROT_NONE, + }), + ::testing::ValuesIn({MAP_SHARED, MAP_PRIVATE}))); + +TEST_P(MmapParamTest, Mmap) { + std::string verity_dir = + ASSERT_NO_ERRNO_AND_VALUE(MountVerity(tmpfs_dir_.path(), filename_)); + + // Make sure the file can be open and mmapped in the mounted verity fs. + auto const verity_fd = ASSERT_NO_ERRNO_AND_VALUE( + Open(JoinPath(verity_dir, filename_), O_RDONLY, 0777)); + + if (prot() == PROT_WRITE && flags() == MAP_SHARED) { + // Verity file system is read-only. + EXPECT_THAT( + reinterpret_cast<intptr_t>(mmap(nullptr, sizeof(kContents) - 1, prot(), + flags(), verity_fd.get(), 0)), + SyscallFailsWithErrno(EACCES)); + } else { + Mapping const m = ASSERT_NO_ERRNO_AND_VALUE(Mmap( + nullptr, sizeof(kContents) - 1, prot(), flags(), verity_fd.get(), 0)); + if (prot() == PROT_NONE) { + // Memory mapped by MAP_NONE cannot be accessed. + EXPECT_EXIT(std::string(m.view()), ::testing::KilledBySignal(SIGSEGV), + ""); + } else { + EXPECT_THAT(std::string(m.view()), ::testing::StrEq(kContents)); + } + } +} + +} // namespace + +} // namespace testing +} // namespace gvisor diff --git a/test/syscalls/linux/verity_mount.cc b/test/syscalls/linux/verity_mount.cc index e73dd5599..d6bfcb46d 100644 --- a/test/syscalls/linux/verity_mount.cc +++ b/test/syscalls/linux/verity_mount.cc @@ -22,13 +22,14 @@ #include "test/util/capability_util.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" +#include "test/util/verity_util.h" namespace gvisor { namespace testing { namespace { -// Mount verity file system on an existing gofer mount. +// Mount verity file system on an existing tmpfs mount. TEST(MountTest, MountExisting) { // Verity is implemented in VFS2. SKIP_IF(IsRunningWithVFS1()); @@ -43,8 +44,11 @@ TEST(MountTest, MountExisting) { // Mount a verity file system on the existing gofer mount. auto const verity_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); std::string opts = "lower_path=" + tmpfs_dir.path(); - EXPECT_THAT(mount("", verity_dir.path().c_str(), "verity", 0, opts.c_str()), + ASSERT_THAT(mount("", verity_dir.path().c_str(), "verity", 0, opts.c_str()), SyscallSucceeds()); + auto const fd = + ASSERT_NO_ERRNO_AND_VALUE(Open(verity_dir.path(), O_RDONLY, 0777)); + EXPECT_THAT(ioctl(fd.get(), FS_IOC_ENABLE_VERITY), SyscallSucceeds()); } } // namespace diff --git a/test/util/BUILD b/test/util/BUILD index 8985b54af..cc83221ea 100644 --- a/test/util/BUILD +++ b/test/util/BUILD @@ -401,3 +401,16 @@ cc_library( "@com_google_absl//absl/strings", ], ) + +cc_library( + name = "verity_util", + testonly = 1, + srcs = ["verity_util.cc"], + hdrs = ["verity_util.h"], + deps = [ + ":fs_util", + ":mount_util", + ":posix_error", + ":temp_path", + ], +) diff --git a/test/util/cgroup_util.cc b/test/util/cgroup_util.cc index 04d4f8de0..977993f41 100644 --- a/test/util/cgroup_util.cc +++ b/test/util/cgroup_util.cc @@ -142,6 +142,20 @@ PosixError Mounter::Unmount(const Cgroup& c) { return NoError(); } +void Mounter::release(const Cgroup& c) { + auto mp = mountpoints_.find(c.id()); + if (mp != mountpoints_.end()) { + mp->second.release(); + mountpoints_.erase(mp); + } + + auto m = mounts_.find(c.id()); + if (m != mounts_.end()) { + m->second.Release(); + mounts_.erase(m); + } +} + constexpr char kProcCgroupsHeader[] = "#subsys_name\thierarchy\tnum_cgroups\tenabled"; diff --git a/test/util/cgroup_util.h b/test/util/cgroup_util.h index b797a8b24..e3f696a89 100644 --- a/test/util/cgroup_util.h +++ b/test/util/cgroup_util.h @@ -83,6 +83,8 @@ class Mounter { PosixError Unmount(const Cgroup& c); + void release(const Cgroup& c); + private: // The destruction order of these members avoids errors during cleanup. We // first unmount (by executing the mounts_ cleanups), then delete the diff --git a/test/util/verity_util.cc b/test/util/verity_util.cc new file mode 100644 index 000000000..f1b4c251b --- /dev/null +++ b/test/util/verity_util.cc @@ -0,0 +1,93 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "test/util/verity_util.h" + +#include "test/util/fs_util.h" +#include "test/util/mount_util.h" +#include "test/util/temp_path.h" + +namespace gvisor { +namespace testing { + +std::string BytesToHexString(uint8_t bytes[], int size) { + std::stringstream ss; + ss << std::hex; + for (int i = 0; i < size; ++i) { + ss << std::setw(2) << std::setfill('0') << static_cast<int>(bytes[i]); + } + return ss.str(); +} + +std::string MerklePath(absl::string_view path) { + return JoinPath(Dirname(path), + std::string(kMerklePrefix) + std::string(Basename(path))); +} + +std::string MerkleRootPath(absl::string_view path) { + return JoinPath(Dirname(path), + std::string(kMerkleRootPrefix) + std::string(Basename(path))); +} + +PosixError FlipRandomBit(int fd, int size) { + // Generate a random offset in the file. + srand(time(nullptr)); + unsigned int seed = 0; + int random_offset = rand_r(&seed) % size; + + // Read a random byte and flip a bit in it. + char buf[1]; + RETURN_ERROR_IF_SYSCALL_FAIL(PreadFd(fd, buf, 1, random_offset)); + buf[0] ^= 1; + RETURN_ERROR_IF_SYSCALL_FAIL(PwriteFd(fd, buf, 1, random_offset)); + return NoError(); +} + +PosixErrorOr<std::string> MountVerity(std::string tmpfs_dir, + std::string filename) { + // Mount a verity fs on the existing tmpfs mount. + std::string mount_opts = "lower_path=" + tmpfs_dir; + ASSIGN_OR_RETURN_ERRNO(TempPath verity_dir, TempPath::CreateDir()); + RETURN_ERROR_IF_SYSCALL_FAIL( + mount("", verity_dir.path().c_str(), "verity", 0, mount_opts.c_str())); + + // Enable both the file and the directory. + ASSIGN_OR_RETURN_ERRNO( + auto fd, Open(JoinPath(verity_dir.path(), filename), O_RDONLY, 0777)); + RETURN_ERROR_IF_SYSCALL_FAIL(ioctl(fd.get(), FS_IOC_ENABLE_VERITY)); + ASSIGN_OR_RETURN_ERRNO(auto dir_fd, Open(verity_dir.path(), O_RDONLY, 0777)); + RETURN_ERROR_IF_SYSCALL_FAIL(ioctl(dir_fd.get(), FS_IOC_ENABLE_VERITY)); + + // Measure the root hash. + uint8_t digest_array[sizeof(struct fsverity_digest) + kMaxDigestSize] = {0}; + struct fsverity_digest* digest = + reinterpret_cast<struct fsverity_digest*>(digest_array); + digest->digest_size = kMaxDigestSize; + RETURN_ERROR_IF_SYSCALL_FAIL( + ioctl(dir_fd.get(), FS_IOC_MEASURE_VERITY, digest)); + + // Mount a verity fs with specified root hash. + mount_opts += + ",root_hash=" + BytesToHexString(digest->digest, digest->digest_size); + ASSIGN_OR_RETURN_ERRNO(TempPath verity_with_hash_dir, TempPath::CreateDir()); + RETURN_ERROR_IF_SYSCALL_FAIL(mount("", verity_with_hash_dir.path().c_str(), + "verity", 0, mount_opts.c_str())); + // Verity directories should not be deleted. Release the TempPath objects to + // prevent those directories from being deleted by the destructor. + verity_dir.release(); + return verity_with_hash_dir.release(); +} + +} // namespace testing +} // namespace gvisor diff --git a/test/util/verity_util.h b/test/util/verity_util.h new file mode 100644 index 000000000..18743ecd6 --- /dev/null +++ b/test/util/verity_util.h @@ -0,0 +1,75 @@ +// Copyright 2021 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#ifndef GVISOR_TEST_UTIL_VERITY_UTIL_H_ +#define GVISOR_TEST_UTIL_VERITY_UTIL_H_ + +#include <stdint.h> + +#include "test/util/posix_error.h" + +namespace gvisor { +namespace testing { + +#ifndef FS_IOC_ENABLE_VERITY +#define FS_IOC_ENABLE_VERITY 1082156677 +#endif + +#ifndef FS_IOC_MEASURE_VERITY +#define FS_IOC_MEASURE_VERITY 3221513862 +#endif + +#ifndef FS_VERITY_FL +#define FS_VERITY_FL 1048576 +#endif + +#ifndef FS_IOC_GETFLAGS +#define FS_IOC_GETFLAGS 2148034049 +#endif + +struct fsverity_digest { + unsigned short digest_algorithm; + unsigned short digest_size; /* input/output */ + unsigned char digest[]; +}; + +constexpr int kMaxDigestSize = 64; +constexpr int kDefaultDigestSize = 32; +constexpr char kContents[] = "foobarbaz"; +constexpr char kMerklePrefix[] = ".merkle.verity."; +constexpr char kMerkleRootPrefix[] = ".merkleroot.verity."; + +// Get the Merkle tree file path for |path|. +std::string MerklePath(absl::string_view path); + +// Get the root Merkle tree file path for |path|. +std::string MerkleRootPath(absl::string_view path); + +// Provide a function to convert bytes to hex string, since +// absl::BytesToHexString does not seem to be compatible with golang +// hex.DecodeString used in verity due to zero-padding. +std::string BytesToHexString(uint8_t bytes[], int size); + +// Flip a random bit in the file represented by fd. +PosixError FlipRandomBit(int fd, int size); + +// Mount a verity on the tmpfs and enable both the file and the direcotry. Then +// mount a new verity with measured root hash. +PosixErrorOr<std::string> MountVerity(std::string tmpfs_dir, + std::string filename); + +} // namespace testing +} // namespace gvisor + +#endif // GVISOR_TEST_UTIL_VERITY_UTIL_H_ diff --git a/tools/checkescape/checkescape.go b/tools/checkescape/checkescape.go index 8eeabbc3d..c788654a8 100644 --- a/tools/checkescape/checkescape.go +++ b/tools/checkescape/checkescape.go @@ -709,8 +709,13 @@ func run(pass *analysis.Pass, localEscapes bool) (interface{}, error) { return } - // Recursively collect information from - // the other analyzers. + // If this package is the atomic package, the implementation + // may be replaced by instrinsics that don't have analysis. + if x.Pkg.Pkg.Path() == "sync/atomic" { + return + } + + // Recursively collect information. var imp packageEscapeFacts if !pass.ImportPackageFact(x.Pkg.Pkg, &imp) { // Unable to import the dependency; we must diff --git a/tools/github/BUILD b/tools/github/BUILD index a345debf6..9c94bbc63 100644 --- a/tools/github/BUILD +++ b/tools/github/BUILD @@ -8,7 +8,7 @@ go_binary( nogo = False, deps = [ "//tools/github/reviver", - "@com_github_google_go_github_v32//github:go_default_library", + "@com_github_google_go_github_v35//github:go_default_library", "@org_golang_x_oauth2//:go_default_library", ], ) diff --git a/tools/github/reviver/BUILD b/tools/github/reviver/BUILD index fc54782f5..aac1c18bf 100644 --- a/tools/github/reviver/BUILD +++ b/tools/github/reviver/BUILD @@ -12,7 +12,7 @@ go_library( visibility = [ "//tools/github:__subpackages__", ], - deps = ["@com_github_google_go_github_v32//github:go_default_library"], + deps = ["@com_github_google_go_github_v35//github:go_default_library"], ) go_test( diff --git a/tools/go_generics/BUILD b/tools/go_generics/BUILD index 807c08ead..78b636130 100644 --- a/tools/go_generics/BUILD +++ b/tools/go_generics/BUILD @@ -5,8 +5,8 @@ package(licenses = ["notice"]) go_binary( name = "go_generics", srcs = [ - "generics.go", "imports.go", + "main.go", "remove.go", ], visibility = ["//:sandbox"], diff --git a/tools/go_generics/generics.go b/tools/go_generics/main.go index 30584006c..30584006c 100644 --- a/tools/go_generics/generics.go +++ b/tools/go_generics/main.go diff --git a/tools/make_release.sh b/tools/make_release.sh index 10742dd54..e125c7e96 100755 --- a/tools/make_release.sh +++ b/tools/make_release.sh @@ -22,8 +22,10 @@ if [[ "$#" -le 2 ]]; then fi set -xeo pipefail -declare -r private_key="$1"; shift -declare -r root="$1"; shift +declare -r private_key="$1" +shift +declare -r root="$1" +shift declare -a binaries declare -a pkgs @@ -44,7 +46,7 @@ install_raw() { name=$(basename "${binary}") mkdir -p "${root}/$1/${arch}" cp -f "${binary}" "${root}/$1/${arch}" - (cd "${root}/$1/${arch}" && sha512sum "${name}" > "${name}.sha512") + (cd "${root}/$1/${arch}" && sha512sum "${name}" >"${name}.sha512") done } @@ -55,7 +57,8 @@ install_apt() { # If nightly, install only nightly artifacts. if [[ "${NIGHTLY:-false}" == "true" ]]; then - # The "latest" directory and current date. + # Install the nightly release. + # https://gvisor.dev/docs/user_guide/install/#nightly stamp="$(date -Idate)" install_raw "nightly/latest" install_raw "nightly/${stamp}" @@ -69,13 +72,23 @@ else for tag in ${tags}; do name=$(echo "${tag}" | cut -d'-' -f2) base=$(echo "${name}" | cut -d'.' -f1) + # Install the "specific" release. This is the latest release with the + # given date. + # https://gvisor.dev/docs/user_guide/install/#specific-release + install_raw "release/${base}" + # Install the "point release". + # https://gvisor.dev/docs/user_guide/install/#point-release install_raw "release/${name}" + # Install the latest release. + # https://gvisor.dev/docs/user_guide/install/#latest-release install_raw "release/latest" + install_apt "release" install_apt "${base}" done else # Otherwise, assume it is a raw master commit. + # https://gvisor.dev/docs/user_guide/install/#head install_raw "master/latest" install_apt "master" fi diff --git a/website/BUILD b/website/BUILD index 6f52e9208..1a38967e5 100644 --- a/website/BUILD +++ b/website/BUILD @@ -165,6 +165,7 @@ docs( "//g3doc/user_guide/tutorials:cni", "//g3doc/user_guide/tutorials:docker", "//g3doc/user_guide/tutorials:docker_compose", + "//g3doc/user_guide/tutorials:knative", "//g3doc/user_guide/tutorials:kubernetes", ], ) |