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Diffstat (limited to 'pkg/sentry/fsimpl/proc/tasks_test.go')
-rw-r--r--pkg/sentry/fsimpl/proc/tasks_test.go456
1 files changed, 0 insertions, 456 deletions
diff --git a/pkg/sentry/fsimpl/proc/tasks_test.go b/pkg/sentry/fsimpl/proc/tasks_test.go
deleted file mode 100644
index 1bb9430c0..000000000
--- a/pkg/sentry/fsimpl/proc/tasks_test.go
+++ /dev/null
@@ -1,456 +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 (
- "fmt"
- "math"
- "path"
- "strconv"
- "testing"
-
- "gvisor.dev/gvisor/pkg/abi/linux"
- "gvisor.dev/gvisor/pkg/context"
- "gvisor.dev/gvisor/pkg/fspath"
- "gvisor.dev/gvisor/pkg/sentry/fsimpl/testutil"
- "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"
-)
-
-var (
- // Next offset 256 by convention. Adds 1 for the next offset.
- selfLink = vfs.Dirent{Type: linux.DT_LNK, NextOff: 256 + 0 + 1}
- threadSelfLink = vfs.Dirent{Type: linux.DT_LNK, NextOff: 256 + 1 + 1}
-
- // /proc/[pid] next offset starts at 256+2 (files above), then adds the
- // PID, and adds 1 for the next offset.
- proc1 = vfs.Dirent{Type: linux.DT_DIR, NextOff: 258 + 1 + 1}
- proc2 = vfs.Dirent{Type: linux.DT_DIR, NextOff: 258 + 2 + 1}
- proc3 = vfs.Dirent{Type: linux.DT_DIR, NextOff: 258 + 3 + 1}
-)
-
-var (
- tasksStaticFiles = map[string]testutil.DirentType{
- "cpuinfo": linux.DT_REG,
- "loadavg": linux.DT_REG,
- "meminfo": linux.DT_REG,
- "mounts": linux.DT_LNK,
- "net": linux.DT_LNK,
- "self": linux.DT_LNK,
- "stat": linux.DT_REG,
- "sys": linux.DT_DIR,
- "thread-self": linux.DT_LNK,
- "uptime": linux.DT_REG,
- "version": linux.DT_REG,
- }
- tasksStaticFilesNextOffs = map[string]int64{
- "self": selfLink.NextOff,
- "thread-self": threadSelfLink.NextOff,
- }
- taskStaticFiles = map[string]testutil.DirentType{
- "auxv": linux.DT_REG,
- "cgroup": linux.DT_REG,
- "cmdline": linux.DT_REG,
- "comm": linux.DT_REG,
- "environ": linux.DT_REG,
- "gid_map": linux.DT_REG,
- "io": linux.DT_REG,
- "maps": linux.DT_REG,
- "net": linux.DT_DIR,
- "ns": linux.DT_DIR,
- "oom_score": linux.DT_REG,
- "oom_score_adj": linux.DT_REG,
- "smaps": linux.DT_REG,
- "stat": linux.DT_REG,
- "statm": linux.DT_REG,
- "status": linux.DT_REG,
- "task": linux.DT_DIR,
- "uid_map": linux.DT_REG,
- }
-)
-
-func setup(t *testing.T) *testutil.System {
- k, err := testutil.Boot()
- if err != nil {
- t.Fatalf("Error creating kernel: %v", err)
- }
-
- ctx := k.SupervisorContext()
- creds := auth.CredentialsFromContext(ctx)
-
- k.VFS().MustRegisterFilesystemType(Name, &FilesystemType{}, &vfs.RegisterFilesystemTypeOptions{
- AllowUserMount: true,
- })
- fsOpts := vfs.GetFilesystemOptions{
- InternalData: &InternalData{
- Cgroups: map[string]string{
- "cpuset": "/foo/cpuset",
- "memory": "/foo/memory",
- },
- },
- }
- mntns, err := k.VFS().NewMountNamespace(ctx, creds, "", Name, &fsOpts)
- if err != nil {
- t.Fatalf("NewMountNamespace(): %v", err)
- }
- return testutil.NewSystem(ctx, t, k.VFS(), mntns)
-}
-
-func TestTasksEmpty(t *testing.T) {
- s := setup(t)
- defer s.Destroy()
-
- collector := s.ListDirents(s.PathOpAtRoot("/"))
- s.AssertAllDirentTypes(collector, tasksStaticFiles)
- s.AssertDirentOffsets(collector, tasksStaticFilesNextOffs)
-}
-
-func TestTasks(t *testing.T) {
- s := setup(t)
- defer s.Destroy()
-
- expectedDirents := make(map[string]testutil.DirentType)
- for n, d := range tasksStaticFiles {
- expectedDirents[n] = d
- }
-
- k := kernel.KernelFromContext(s.Ctx)
- var tasks []*kernel.Task
- for i := 0; i < 5; i++ {
- tc := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, k.GlobalInit().Limits())
- task, err := testutil.CreateTask(s.Ctx, fmt.Sprintf("name-%d", i), tc, s.MntNs, s.Root, s.Root)
- if err != nil {
- t.Fatalf("CreateTask(): %v", err)
- }
- tasks = append(tasks, task)
- expectedDirents[fmt.Sprintf("%d", i+1)] = linux.DT_DIR
- }
-
- collector := s.ListDirents(s.PathOpAtRoot("/"))
- s.AssertAllDirentTypes(collector, expectedDirents)
- s.AssertDirentOffsets(collector, tasksStaticFilesNextOffs)
-
- lastPid := 0
- dirents := collector.OrderedDirents()
- doneSkippingNonTaskDirs := false
- for _, d := range dirents {
- pid, err := strconv.Atoi(d.Name)
- if err != nil {
- if !doneSkippingNonTaskDirs {
- // We haven't gotten to the task dirs yet.
- continue
- }
- t.Fatalf("Invalid process directory %q", d.Name)
- }
- doneSkippingNonTaskDirs = true
- if lastPid > pid {
- t.Errorf("pids not in order: %v", dirents)
- }
- found := false
- for _, t := range tasks {
- if k.TaskSet().Root.IDOfTask(t) == kernel.ThreadID(pid) {
- found = true
- }
- }
- if !found {
- t.Errorf("Additional task ID %d listed: %v", pid, tasks)
- }
- // Next offset starts at 256+2 ('self' and 'thread-self'), then adds the
- // PID, and adds 1 for the next offset.
- if want := int64(256 + 2 + pid + 1); d.NextOff != want {
- t.Errorf("Wrong dirent offset want: %d got: %d: %+v", want, d.NextOff, d)
- }
- }
- if !doneSkippingNonTaskDirs {
- t.Fatalf("Never found any process directories.")
- }
-
- // Test lookup.
- for _, path := range []string{"/1", "/2"} {
- fd, err := s.VFS.OpenAt(
- s.Ctx,
- s.Creds,
- s.PathOpAtRoot(path),
- &vfs.OpenOptions{},
- )
- if err != nil {
- t.Fatalf("vfsfs.OpenAt(%q) failed: %v", path, err)
- }
- buf := make([]byte, 1)
- bufIOSeq := usermem.BytesIOSequence(buf)
- if _, err := fd.Read(s.Ctx, bufIOSeq, vfs.ReadOptions{}); err != syserror.EISDIR {
- t.Errorf("wrong error reading directory: %v", err)
- }
- }
-
- if _, err := s.VFS.OpenAt(
- s.Ctx,
- s.Creds,
- s.PathOpAtRoot("/9999"),
- &vfs.OpenOptions{},
- ); err != syserror.ENOENT {
- t.Fatalf("wrong error from vfsfs.OpenAt(/9999): %v", err)
- }
-}
-
-func TestTasksOffset(t *testing.T) {
- s := setup(t)
- defer s.Destroy()
-
- k := kernel.KernelFromContext(s.Ctx)
- for i := 0; i < 3; i++ {
- tc := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, k.GlobalInit().Limits())
- if _, err := testutil.CreateTask(s.Ctx, fmt.Sprintf("name-%d", i), tc, s.MntNs, s.Root, s.Root); err != nil {
- t.Fatalf("CreateTask(): %v", err)
- }
- }
-
- for _, tc := range []struct {
- name string
- offset int64
- wants map[string]vfs.Dirent
- }{
- {
- name: "small offset",
- offset: 100,
- wants: map[string]vfs.Dirent{
- "self": selfLink,
- "thread-self": threadSelfLink,
- "1": proc1,
- "2": proc2,
- "3": proc3,
- },
- },
- {
- name: "offset at start",
- offset: 256,
- wants: map[string]vfs.Dirent{
- "self": selfLink,
- "thread-self": threadSelfLink,
- "1": proc1,
- "2": proc2,
- "3": proc3,
- },
- },
- {
- name: "skip /proc/self",
- offset: 257,
- wants: map[string]vfs.Dirent{
- "thread-self": threadSelfLink,
- "1": proc1,
- "2": proc2,
- "3": proc3,
- },
- },
- {
- name: "skip symlinks",
- offset: 258,
- wants: map[string]vfs.Dirent{
- "1": proc1,
- "2": proc2,
- "3": proc3,
- },
- },
- {
- name: "skip first process",
- offset: 260,
- wants: map[string]vfs.Dirent{
- "2": proc2,
- "3": proc3,
- },
- },
- {
- name: "last process",
- offset: 261,
- wants: map[string]vfs.Dirent{
- "3": proc3,
- },
- },
- {
- name: "after last",
- offset: 262,
- wants: nil,
- },
- {
- name: "TaskLimit+1",
- offset: kernel.TasksLimit + 1,
- wants: nil,
- },
- {
- name: "max",
- offset: math.MaxInt64,
- wants: nil,
- },
- } {
- t.Run(tc.name, func(t *testing.T) {
- s := s.WithSubtest(t)
- fd, err := s.VFS.OpenAt(
- s.Ctx,
- s.Creds,
- s.PathOpAtRoot("/"),
- &vfs.OpenOptions{},
- )
- if err != nil {
- t.Fatalf("vfsfs.OpenAt(/) failed: %v", err)
- }
- if _, err := fd.Seek(s.Ctx, tc.offset, linux.SEEK_SET); err != nil {
- t.Fatalf("Seek(%d, SEEK_SET): %v", tc.offset, err)
- }
-
- var collector testutil.DirentCollector
- if err := fd.IterDirents(s.Ctx, &collector); err != nil {
- t.Fatalf("IterDirent(): %v", err)
- }
-
- expectedTypes := make(map[string]testutil.DirentType)
- expectedOffsets := make(map[string]int64)
- for name, want := range tc.wants {
- expectedTypes[name] = want.Type
- if want.NextOff != 0 {
- expectedOffsets[name] = want.NextOff
- }
- }
-
- collector.SkipDotsChecks(true) // We seek()ed past the dots.
- s.AssertAllDirentTypes(&collector, expectedTypes)
- s.AssertDirentOffsets(&collector, expectedOffsets)
- })
- }
-}
-
-func TestTask(t *testing.T) {
- s := setup(t)
- defer s.Destroy()
-
- k := kernel.KernelFromContext(s.Ctx)
- tc := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, k.GlobalInit().Limits())
- _, err := testutil.CreateTask(s.Ctx, "name", tc, s.MntNs, s.Root, s.Root)
- if err != nil {
- t.Fatalf("CreateTask(): %v", err)
- }
-
- collector := s.ListDirents(s.PathOpAtRoot("/1"))
- s.AssertAllDirentTypes(collector, taskStaticFiles)
-}
-
-func TestProcSelf(t *testing.T) {
- s := setup(t)
- defer s.Destroy()
-
- k := kernel.KernelFromContext(s.Ctx)
- tc := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, k.GlobalInit().Limits())
- task, err := testutil.CreateTask(s.Ctx, "name", tc, s.MntNs, s.Root, s.Root)
- if err != nil {
- t.Fatalf("CreateTask(): %v", err)
- }
-
- collector := s.WithTemporaryContext(task).ListDirents(&vfs.PathOperation{
- Root: s.Root,
- Start: s.Root,
- Path: fspath.Parse("/self/"),
- FollowFinalSymlink: true,
- })
- s.AssertAllDirentTypes(collector, taskStaticFiles)
-}
-
-func iterateDir(ctx context.Context, t *testing.T, s *testutil.System, fd *vfs.FileDescription) {
- t.Logf("Iterating: /proc%s", fd.MappedName(ctx))
-
- var collector testutil.DirentCollector
- if err := fd.IterDirents(ctx, &collector); err != nil {
- t.Fatalf("IterDirents(): %v", err)
- }
- if err := collector.Contains(".", linux.DT_DIR); err != nil {
- t.Error(err.Error())
- }
- if err := collector.Contains("..", linux.DT_DIR); err != nil {
- t.Error(err.Error())
- }
-
- for _, d := range collector.Dirents() {
- if d.Name == "." || d.Name == ".." {
- continue
- }
- childPath := path.Join(fd.MappedName(ctx), d.Name)
- if d.Type == linux.DT_LNK {
- link, err := s.VFS.ReadlinkAt(
- ctx,
- auth.CredentialsFromContext(ctx),
- &vfs.PathOperation{Root: s.Root, Start: s.Root, Path: fspath.Parse(childPath)},
- )
- if err != nil {
- t.Errorf("vfsfs.ReadlinkAt(%v) failed: %v", childPath, err)
- } else {
- t.Logf("Skipping symlink: /proc%s => %s", childPath, link)
- }
- continue
- }
-
- t.Logf("Opening: /proc%s", childPath)
- child, err := s.VFS.OpenAt(
- ctx,
- auth.CredentialsFromContext(ctx),
- &vfs.PathOperation{Root: s.Root, Start: s.Root, Path: fspath.Parse(childPath)},
- &vfs.OpenOptions{},
- )
- if err != nil {
- t.Errorf("vfsfs.OpenAt(%v) failed: %v", childPath, err)
- continue
- }
- stat, err := child.Stat(ctx, vfs.StatOptions{})
- if err != nil {
- t.Errorf("Stat(%v) failed: %v", childPath, err)
- }
- if got := linux.FileMode(stat.Mode).DirentType(); got != d.Type {
- t.Errorf("wrong file mode, stat: %v, dirent: %v", got, d.Type)
- }
- if d.Type == linux.DT_DIR {
- // Found another dir, let's do it again!
- iterateDir(ctx, t, s, child)
- }
- }
-}
-
-// TestTree iterates all directories and stats every file.
-func TestTree(t *testing.T) {
- s := setup(t)
- defer s.Destroy()
-
- k := kernel.KernelFromContext(s.Ctx)
- var tasks []*kernel.Task
- for i := 0; i < 5; i++ {
- tc := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, k.GlobalInit().Limits())
- task, err := testutil.CreateTask(s.Ctx, fmt.Sprintf("name-%d", i), tc, s.MntNs, s.Root, s.Root)
- if err != nil {
- t.Fatalf("CreateTask(): %v", err)
- }
- tasks = append(tasks, task)
- }
-
- ctx := tasks[0]
- fd, err := s.VFS.OpenAt(
- ctx,
- auth.CredentialsFromContext(s.Ctx),
- &vfs.PathOperation{Root: s.Root, Start: s.Root, Path: fspath.Parse("/")},
- &vfs.OpenOptions{},
- )
- if err != nil {
- t.Fatalf("vfsfs.OpenAt(/) failed: %v", err)
- }
- iterateDir(ctx, t, s, fd)
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 13:37:01 +0000