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2018-09-27Implement 'runsc kill --all'Fabricio Voznika
In order to implement kill --all correctly, the Sentry needs to track all tasks that belong to a given container. This change introduces ContainerID to the task, that gets inherited by all children. 'kill --all' then iterates over all tasks comparing the ContainerID field to find all processes that need to be signalled. PiperOrigin-RevId: 214841768 Change-Id: I693b2374be8692d88cc441ef13a0ae34abf73ac6
2018-09-27netstack: make go:linkname work for all architecturesAnton Gyllenberg
The //go:linkname directive requires the presence of assembly files in the package. Even an empty file will do. There was an empty assembly file commit_arm64.s, but that is limited to GOARCH=arm64. Renaming to empty.s will remove the unnecessary build constraint and allow building netstack for other architectures than amd64 and arm64. Without this, building directly with go (not bazel) for e.g., GOARCH=arm gives: sleep/sleep_unsafe.go:88:6: missing function body sleep/sleep_unsafe.go:91:6: missing function body Change-Id: I29d1d13e1ff31506a174d4595b8cd57fa58bf52b PiperOrigin-RevId: 214820299
2018-09-27sentry: export cpuTime function.Zhaozhong Ni
PiperOrigin-RevId: 214798278 Change-Id: Id59d1ceb35037cda0689d3a1c4844e96c6957615
2018-09-27Refactor 'runsc boot' to take container ID as argumentFabricio Voznika
This makes the flow slightly simpler (no need to call Loader.SetRootContainer). And this is required change to tag tasks with container ID inside the Sentry. PiperOrigin-RevId: 214795210 Change-Id: I6ff4af12e73bb07157f7058bb15fd5bb88760884
2018-09-27Move uds_test_app to common test_appFabricio Voznika
This was done so it's easier to add more functionality to this file for other tests. PiperOrigin-RevId: 214782043 Change-Id: I1f38b9ee1219b3ce7b789044ada8e52bdc1e6279
2018-09-26Return correct parent PIDFabricio Voznika
Old code was returning ID of the thread that created the child process. It should be returning the ID of the parent process instead. PiperOrigin-RevId: 214720910 Change-Id: I95715c535bcf468ecf1ae771cccd04a4cd345b36
2018-09-26runsc: fix pid file race condition in exec detach mode.Lantao Liu
PiperOrigin-RevId: 214700295 Change-Id: I73d8490572eebe5da584af91914650d1953aeb91
2018-09-26Use the ICMP target address in responsesTamir Duberstein
There is a subtle bug that is the result of two changes made when upstreaming ICMPv6 support from Fuchsia: 1) ipv6.endpoint.WritePacket writes the local address it was initialized with, rather than the provided route's local address 2) ipv6.endpoint.handleICMP doesn't set its route's local address to the ICMP target address before writing the response The result is that the ICMP response erroneously uses the target ipv6 address (rather than icmp) as its source address in the response. When trying to debug this by fixing (2), we ran into problems with bad ipv6 checksums because (1) didn't respect the local address of the route being passed to it. This fixes both problems. PiperOrigin-RevId: 214650822 Change-Id: Ib6148bf432e6428d760ef9da35faef8e4b610d69
2018-09-26Export ipv6 address helpersTamir Duberstein
This is useful for Fuchsia. PiperOrigin-RevId: 214619681 Change-Id: If5a60dd82365c2eae51a12bbc819e5aae8c76ee9
2018-09-24runsc: All non-root bind mounts should be shared.Nicolas Lacasse
This CL changes the semantics of the "--file-access" flag so that it only affects the root filesystem. The default remains "exclusive" which is the common use case, as neither Docker nor K8s supports sharing the root. Keeping the root fs as "exclusive" means that the fs-intensive work done during application startup will mostly be cacheable, and thus faster. Non-root bind mounts will always be shared. This CL also removes some redundant FSAccessType validations. We validate this flag in main(), so we can assume it is valid afterwards. PiperOrigin-RevId: 214359936 Change-Id: I7e75d7bf52dbd7fa834d0aacd4034868314f3b51
2018-09-21Remove unnecessary deferIan Gudger
PiperOrigin-RevId: 214073949 Change-Id: I8fab916cd77362c13dac2c9dcf2ecc1710d87a5e
2018-09-21Run gofmt -s on everythingIan Gudger
PiperOrigin-RevId: 214040901 Change-Id: I74d79497a053da3624921ad2b7c5193ca4a87942
2018-09-21Extend tcpip.Address.String to ipv6 addressesTamir Duberstein
PiperOrigin-RevId: 214039349 Change-Id: Ia7d09c5f85eddd1e5634f3c21b0bd60b10be6bd2
2018-09-21The "action" in container.Signal should be "signal".Nicolas Lacasse
PiperOrigin-RevId: 214038776 Change-Id: I4ad212540ec4ef4fb5ab5fdcb7f0865c4f746895
2018-09-21Deflake TestSimpleReceiveTamir Duberstein
...by increasing the allotted timeout and using direct comparison rather than reflect.DeepEqual (which should be faster). PiperOrigin-RevId: 214027024 Change-Id: I0a2690e65c7e14b4cc118c7312dbbf5267dc78bc
2018-09-21Export read-only tcpip.Subnet.MaskTamir Duberstein
PiperOrigin-RevId: 214023383 Change-Id: I5a7572f949840fb68a3ffb7342e6a3524bd00864
2018-09-21runsc: Synchronize container metadata changes with a file lock.Nicolas Lacasse
Each container has associated metadata (particularly the container status) that is manipulated by various runsc commands. This metadata is stored in a file identified by the container id. Different runsc processes may manipulate the same container metadata, and each will read/write to the metadata file. This CL adds a file lock per container which must be held when reading the container metadata file, and when modifying and writing the container metadata. PiperOrigin-RevId: 214019179 Change-Id: Ice4390ad233bc7f216c9a9a6cf05fb456c9ec0ad
2018-09-20Set Sandbox.Chroot so it gets cleaned up upon destructionFabricio Voznika
I've made several attempts to create a test, but the lack of permission from the test user makes it nearly impossible to test anything useful. PiperOrigin-RevId: 213922174 Change-Id: I5b502ca70cb7a6645f8836f028fb203354b4c625
2018-09-20runsc: allow `runsc wait` on a container for multiple times.Lantao Liu
PiperOrigin-RevId: 213908919 Change-Id: I74eff99a5360bb03511b946f4cb5658bb5fc40c7
2018-09-20Wait for all async fs operations to complete before returning from Destroy.Nicolas Lacasse
Destroy flushes dirent references, which triggers many async close operations. We must wait for those to finish before returning from Destroy, otherwise we may kill the gofer, causing a cascade of failing RPCs and leading to an inconsistent FS state. PiperOrigin-RevId: 213884637 Change-Id: Id054b47fc0f97adc5e596d747c08d3b97a1d1f71
2018-09-20runsc: Fix a bug that `runsc wait` doesn't work after container exits.Lantao Liu
PiperOrigin-RevId: 213849165 Change-Id: I5120b2f568850c0c42a08e8706e7f8653ef1bd94
2018-09-19runsc: Fix stdin/stdout/stderr in multi-container mode.Kevin Krakauer
The issue with the previous change was that the stdin/stdout/stderr passed to the sentry were dup'd by host.ImportFile. This left a dangling FD that by never closing caused containerd to timeout waiting on container stop. PiperOrigin-RevId: 213753032 Change-Id: Ia5e4c0565c42c8610d3b59f65599a5643b0901e4
2018-09-19Add container.Destroy urpc method.Nicolas Lacasse
This method will: 1. Stop the container process if it is still running. 2. Unmount all sanadbox-internal mounts for the container. 3. Delete the contaner root directory inside the sandbox. Destroy is idempotent, and safe to call concurrantly. This fixes a bug where after stopping a container, we cannot unmount the container root directory on the host. This bug occured because the sandbox dirent cache was holding a dirent with a host fd corresponding to a file inside the container root on the host. The dirent cache did not know that the container had exited, and kept the FD open, preventing us from unmounting on the host. Now that we unmount (and flush) all container mounts inside the sandbox, any host FDs donated by the gofer will be closed, and we can unmount the container root on the host. PiperOrigin-RevId: 213737693 Change-Id: I28c0ff4cd19a08014cdd72fec5154497e92aacc9
2018-09-19Update gocapability commit to get bug fixFabricio Voznika
PiperOrigin-RevId: 213734203 Change-Id: I9cf5d3885fb88b41444c686168d4cab00f09988a
2018-09-19runsc: Mark container_test flaky.Kevin Krakauer
PiperOrigin-RevId: 213732520 Change-Id: Ife292987ec8b1de4c2e7e3b7d4452b00c1582e91
2018-09-19Fix data race on tcp.endpoint.hardError in tcp.(*endpoint).ReadIan Gudger
tcp.endpoint.hardError is protected by tcp.endpoint.mu. PiperOrigin-RevId: 213730698 Change-Id: I4e4f322ac272b145b500b1a652fbee0c7b985be2
2018-09-19Fix sandbox and gofer capabilitiesFabricio Voznika
Capabilities.Set() adds capabilities, but doesn't remove existing ones that might have been loaded. Fixed the code and added tests. PiperOrigin-RevId: 213726369 Change-Id: Id7fa6fce53abf26c29b13b9157bb4c6616986fba
2018-09-19runsc: Don't create __runsc_containers__ unless we are in multi-container mode.Nicolas Lacasse
PiperOrigin-RevId: 213715511 Change-Id: I3e41b583c6138edbdeba036dfb9df4864134fc12
2018-09-19Pass local link address to DeliverNetworkPacketBert Muthalaly
This allows a NetworkDispatcher to implement transparent bridging, assuming all implementations of LinkEndpoint.WritePacket call eth.Encode with header.EthernetFields.SrcAddr set to the passed Route.LocalLinkAddress, if it is provided. PiperOrigin-RevId: 213686651 Change-Id: I446a4ac070970202f0724ef796ff1056ae4dd72a
2018-09-19Add docker command line args support for --cpuset-cpus and --cpusLingfu
`docker run --cpuset-cpus=/--cpus=` will generate cpu resource info in config.json (runtime spec file). When nginx worker_connections is configured as auto, the worker is generated according to the number of CPUs. If the cgroup is already set on the host, but it is not displayed correctly in the sandbox, performance may be degraded. This patch can get cpus info from spec file and apply to sentry on bootup, so the /proc/cpuinfo can show the correct cpu numbers. `lscpu` and other commands rely on `/sys/devices/system/cpu/online` are also affected by this patch. e.g. --cpuset-cpus=2,3 -> cpu number:2 --cpuset-cpus=4-7 -> cpu number:4 --cpus=2.8 -> cpu number:3 --cpus=0.5 -> cpu number:1 Change-Id: Ideb22e125758d4322a12be7c51795f8018e3d316 PiperOrigin-RevId: 213685199
2018-09-19Fix RTT estimation when timestamp option is enabled.Bhasker Hariharan
From RFC7323#Section-4 The [RFC6298] RTT estimator has weighting factors, alpha and beta, based on an implicit assumption that at most one RTTM will be sampled per RTT. When multiple RTTMs per RTT are available to update the RTT estimator, an implementation SHOULD try to adhere to the spirit of the history specified in [RFC6298]. An implementation suggestion is detailed in Appendix G. From RFC7323#appendix-G Appendix G. RTO Calculation Modification Taking multiple RTT samples per window would shorten the history calculated by the RTO mechanism in [RFC6298], and the below algorithm aims to maintain a similar history as originally intended by [RFC6298]. It is roughly known how many samples a congestion window worth of data will yield, not accounting for ACK compression, and ACK losses. Such events will result in more history of the path being reflected in the final value for RTO, and are uncritical. This modification will ensure that a similar amount of time is taken into account for the RTO estimation, regardless of how many samples are taken per window: ExpectedSamples = ceiling(FlightSize / (SMSS * 2)) alpha' = alpha / ExpectedSamples beta' = beta / ExpectedSamples Note that the factor 2 in ExpectedSamples is due to "Delayed ACKs". Instead of using alpha and beta in the algorithm of [RFC6298], use alpha' and beta' instead: RTTVAR <- (1 - beta') * RTTVAR + beta' * |SRTT - R'| SRTT <- (1 - alpha') * SRTT + alpha' * R' (for each sample R') PiperOrigin-RevId: 213644795 Change-Id: I52278b703540408938a8edb8c38be97b37f4a10e
2018-09-18Added state machine checks for Container.StatusFabricio Voznika
For my own sanitity when thinking about possible transitions and state. PiperOrigin-RevId: 213559482 Change-Id: I25588c86cf6098be4eda01f4e7321c102ceef33c
2018-09-18Short-circuit Readdir calls on overlay files when the dirent is frozen.Nicolas Lacasse
If we have an overlay file whose corresponding Dirent is frozen, then we should not bother calling Readdir on the upper or lower files, since DirentReaddir will calculate children based on the frozen Dirent tree. A test was added that fails without this change. PiperOrigin-RevId: 213531215 Change-Id: I4d6c98f1416541a476a34418f664ba58f936a81d
2018-09-18Handle children processes better in testsFabricio Voznika
Reap children more systematically in container tests. Previously, container_test was taking ~5 mins to run because constainer.Destroy() would timeout waiting for the sandbox process to exit. Now the test running in less than a minute. Also made the contract around Container and Sandbox destroy clearer. PiperOrigin-RevId: 213527471 Change-Id: Icca84ee1212bbdcb62bdfc9cc7b71b12c6d1688d
2018-09-18Increase state test timeoutMichael Pratt
PiperOrigin-RevId: 213519378 Change-Id: Iffdb987da3a7209a297ea2df171d2ae5fa9b2b34
2018-09-18Automated rollback of changelist 213307171Kevin Krakauer
PiperOrigin-RevId: 213504354 Change-Id: Iadd42f0ca4b7e7a9eae780bee9900c7233fb4f3f
2018-09-18Allow for MSG_CTRUNC in input flags for recv.Brian Geffon
PiperOrigin-RevId: 213481363 Change-Id: I8150ea20cebeb207afe031ed146244de9209e745
2018-09-18Provide better message when memfd_create fails with ENOSYSFabricio Voznika
Updates #100 PiperOrigin-RevId: 213414821 Change-Id: I90c2e6c18c54a6afcd7ad6f409f670aa31577d37
2018-09-17Remove memory usage static initFabricio Voznika
panic() during init() can be hard to debug. Updates #100 PiperOrigin-RevId: 213391932 Change-Id: Ic103f1981c5b48f1e12da3b42e696e84ffac02a9
2018-09-17Rename container in testFabricio Voznika
's' used to stand for sandbox, before container exited. PiperOrigin-RevId: 213390641 Change-Id: I7bda94a50398c46721baa92227e32a7a1d817412
2018-09-17Prevent TCP connect from picking bound portsTamir Duberstein
PiperOrigin-RevId: 213387851 Change-Id: Icc6850761bc11afd0525f34863acd77584155140
2018-09-17runsc: Enable waiting on exited processes.Kevin Krakauer
This makes `runsc wait` behave more like waitpid()/wait4() in that: - Once a process has run to completion, you can wait on it and get its exit code. - Processes not waited on will consume memory (like a zombie process) PiperOrigin-RevId: 213358916 Change-Id: I5b5eca41ce71eea68e447380df8c38361a4d1558
2018-09-17Allow kernel.(*Task).Block to accept an extract only channelIan Gudger
PiperOrigin-RevId: 213328293 Change-Id: I4164133e6f709ecdb89ffbb5f7df3324c273860a
2018-09-17Add empty .s file to allow `//go:linkname`Tamir Duberstein
This was previously broken in 212917409, resulting in "missing function body" compilation errors. PiperOrigin-RevId: 213323695 Change-Id: I32a95b76a1c73fd731f223062ec022318b979bd4
2018-09-17Implement packet forwarding to enable NATTamir Duberstein
PiperOrigin-RevId: 213323501 Change-Id: I0996ddbdcf097588745efe35481085d42dbaf446
2018-09-17Allow NULL data in mount(2)Michael Pratt
PiperOrigin-RevId: 213315267 Change-Id: I7562bcd81fb22e90aa9c7dd9eeb94803fcb8c5af
2018-09-17runsc: Fix stdin/out/err in multi-container mode.Kevin Krakauer
Stdin/out/err weren't being sent to the sentry. PiperOrigin-RevId: 213307171 Change-Id: Ie4b634a58b1b69aa934ce8597e5cc7a47a2bcda2
2018-09-14Avoid reuse of pending SignalInfo objectsnewmanwang
runApp.execute -> Task.SendSignal -> sendSignalLocked -> sendSignalTimerLocked -> pendingSignals.enqueue assumes that it owns the arch.SignalInfo returned from platform.Context.Switch. On the other hand, ptrace.context.Switch assumes that it owns the returned SignalInfo and can safely reuse it on the next call to Switch. The KVM platform always returns a unique SignalInfo. This becomes a problem when the returned signal is not immediately delivered, allowing a future signal in Switch to change the previous pending SignalInfo. This is noticeable in #38 when external SIGINTs are delivered from the PTY slave FD. Note that the ptrace stubs are in the same process group as the sentry, so they are eligible to receive the PTY signals. This should probably change, but is not the only possible cause of this bug. Updates #38 Original change by newmanwang <wcs1011@gmail.com>, updated by Michael Pratt <mpratt@google.com>. Change-Id: I5383840272309df70a29f67b25e8221f933622cd PiperOrigin-RevId: 213071072
2018-09-14Remove buffer.Prependable.UsedBytesTamir Duberstein
It is the same as buffer.Prependable.View. PiperOrigin-RevId: 213064166 Change-Id: Ib33b8a2c4da864209d9a0be0a1c113be10b520d3
2018-09-14Reuse readlink parameter, add sockaddr max.Michael Pratt
PiperOrigin-RevId: 213058623 Change-Id: I522598c655d633b9330990951ff1c54d1023ec29
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