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Diffstat (limited to 'pkg/sentry/fsimpl/proc/tasks_sys.go')
-rw-r--r--pkg/sentry/fsimpl/proc/tasks_sys.go209
1 files changed, 0 insertions, 209 deletions
diff --git a/pkg/sentry/fsimpl/proc/tasks_sys.go b/pkg/sentry/fsimpl/proc/tasks_sys.go
deleted file mode 100644
index c7ce74883..000000000
--- a/pkg/sentry/fsimpl/proc/tasks_sys.go
+++ /dev/null
@@ -1,209 +0,0 @@
-// Copyright 2019 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 proc
-
-import (
- "bytes"
- "fmt"
-
- "gvisor.dev/gvisor/pkg/abi/linux"
- "gvisor.dev/gvisor/pkg/context"
- "gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs"
- "gvisor.dev/gvisor/pkg/sentry/inet"
- "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"
-)
-
-// newSysDir returns the dentry corresponding to /proc/sys directory.
-func newSysDir(root *auth.Credentials, inoGen InoGenerator, k *kernel.Kernel) *kernfs.Dentry {
- return kernfs.NewStaticDir(root, inoGen.NextIno(), 0555, map[string]*kernfs.Dentry{
- "kernel": kernfs.NewStaticDir(root, inoGen.NextIno(), 0555, map[string]*kernfs.Dentry{
- "hostname": newDentry(root, inoGen.NextIno(), 0444, &hostnameData{}),
- "shmall": newDentry(root, inoGen.NextIno(), 0444, shmData(linux.SHMALL)),
- "shmmax": newDentry(root, inoGen.NextIno(), 0444, shmData(linux.SHMMAX)),
- "shmmni": newDentry(root, inoGen.NextIno(), 0444, shmData(linux.SHMMNI)),
- }),
- "vm": kernfs.NewStaticDir(root, inoGen.NextIno(), 0555, map[string]*kernfs.Dentry{
- "mmap_min_addr": newDentry(root, inoGen.NextIno(), 0444, &mmapMinAddrData{}),
- "overcommit_memory": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0\n")),
- }),
- "net": newSysNetDir(root, inoGen, k),
- })
-}
-
-// newSysNetDir returns the dentry corresponding to /proc/sys/net directory.
-func newSysNetDir(root *auth.Credentials, inoGen InoGenerator, k *kernel.Kernel) *kernfs.Dentry {
- var contents map[string]*kernfs.Dentry
-
- if stack := k.NetworkStack(); stack != nil {
- contents = map[string]*kernfs.Dentry{
- "ipv4": kernfs.NewStaticDir(root, inoGen.NextIno(), 0555, map[string]*kernfs.Dentry{
- "tcp_sack": newDentry(root, inoGen.NextIno(), 0644, &tcpSackData{stack: stack}),
-
- // The following files are simple stubs until they are implemented in
- // netstack, most of these files are configuration related. We use the
- // value closest to the actual netstack behavior or any empty file, all
- // of these files will have mode 0444 (read-only for all users).
- "ip_local_port_range": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("16000 65535")),
- "ip_local_reserved_ports": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("")),
- "ipfrag_time": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("30")),
- "ip_nonlocal_bind": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "ip_no_pmtu_disc": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("1")),
-
- // tcp_allowed_congestion_control tell the user what they are able to
- // do as an unprivledged process so we leave it empty.
- "tcp_allowed_congestion_control": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("")),
- "tcp_available_congestion_control": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("reno")),
- "tcp_congestion_control": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("reno")),
-
- // Many of the following stub files are features netstack doesn't
- // support. The unsupported features return "0" to indicate they are
- // disabled.
- "tcp_base_mss": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("1280")),
- "tcp_dsack": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "tcp_early_retrans": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "tcp_fack": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "tcp_fastopen": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "tcp_fastopen_key": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("")),
- "tcp_invalid_ratelimit": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "tcp_keepalive_intvl": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "tcp_keepalive_probes": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "tcp_keepalive_time": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("7200")),
- "tcp_mtu_probing": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "tcp_no_metrics_save": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("1")),
- "tcp_probe_interval": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "tcp_probe_threshold": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "tcp_retries1": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("3")),
- "tcp_retries2": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("15")),
- "tcp_rfc1337": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("1")),
- "tcp_slow_start_after_idle": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("1")),
- "tcp_synack_retries": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("5")),
- "tcp_syn_retries": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("3")),
- "tcp_timestamps": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("1")),
- }),
- "core": kernfs.NewStaticDir(root, inoGen.NextIno(), 0555, map[string]*kernfs.Dentry{
- "default_qdisc": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("pfifo_fast")),
- "message_burst": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("10")),
- "message_cost": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("5")),
- "optmem_max": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("0")),
- "rmem_default": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("212992")),
- "rmem_max": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("212992")),
- "somaxconn": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("128")),
- "wmem_default": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("212992")),
- "wmem_max": newDentry(root, inoGen.NextIno(), 0444, newStaticFile("212992")),
- }),
- }
- }
-
- return kernfs.NewStaticDir(root, inoGen.NextIno(), 0555, map[string]*kernfs.Dentry{
- "net": kernfs.NewStaticDir(root, inoGen.NextIno(), 0555, contents),
- })
-}
-
-// mmapMinAddrData implements vfs.DynamicBytesSource for
-// /proc/sys/vm/mmap_min_addr.
-//
-// +stateify savable
-type mmapMinAddrData struct {
- kernfs.DynamicBytesFile
-
- k *kernel.Kernel
-}
-
-var _ dynamicInode = (*mmapMinAddrData)(nil)
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (d *mmapMinAddrData) Generate(ctx context.Context, buf *bytes.Buffer) error {
- fmt.Fprintf(buf, "%d\n", d.k.Platform.MinUserAddress())
- return nil
-}
-
-// hostnameData implements vfs.DynamicBytesSource for /proc/sys/kernel/hostname.
-//
-// +stateify savable
-type hostnameData struct {
- kernfs.DynamicBytesFile
-}
-
-var _ dynamicInode = (*hostnameData)(nil)
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (*hostnameData) Generate(ctx context.Context, buf *bytes.Buffer) error {
- utsns := kernel.UTSNamespaceFromContext(ctx)
- buf.WriteString(utsns.HostName())
- buf.WriteString("\n")
- return nil
-}
-
-// tcpSackData implements vfs.WritableDynamicBytesSource for
-// /proc/sys/net/tcp_sack.
-//
-// +stateify savable
-type tcpSackData struct {
- kernfs.DynamicBytesFile
-
- stack inet.Stack `state:"wait"`
- enabled *bool
-}
-
-var _ vfs.WritableDynamicBytesSource = (*tcpSackData)(nil)
-
-// Generate implements vfs.DynamicBytesSource.
-func (d *tcpSackData) Generate(ctx context.Context, buf *bytes.Buffer) error {
- if d.enabled == nil {
- sack, err := d.stack.TCPSACKEnabled()
- if err != nil {
- return err
- }
- d.enabled = &sack
- }
-
- val := "0\n"
- if *d.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.
- val = "1\n"
- }
- buf.WriteString(val)
- return nil
-}
-
-func (d *tcpSackData) Write(ctx context.Context, src usermem.IOSequence, offset int64) (int64, error) {
- if offset != 0 {
- // No need to handle partial writes thus far.
- return 0, syserror.EINVAL
- }
- if src.NumBytes() == 0 {
- return 0, nil
- }
-
- // Limit the amount of memory allocated.
- src = src.TakeFirst(usermem.PageSize - 1)
-
- var v int32
- n, err := usermem.CopyInt32StringInVec(ctx, src.IO, src.Addrs, &v, src.Opts)
- if err != nil {
- return n, err
- }
- if d.enabled == nil {
- d.enabled = new(bool)
- }
- *d.enabled = v != 0
- return n, d.stack.SetTCPSACKEnabled(*d.enabled)
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 13:39:30 +0000