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-rw-r--r--pkg/sentry/fsimpl/devtmpfs/BUILD37
-rw-r--r--pkg/sentry/fsimpl/devtmpfs/devtmpfs_state_autogen.go41
-rw-r--r--pkg/sentry/fsimpl/devtmpfs/devtmpfs_test.go230
3 files changed, 41 insertions, 267 deletions
diff --git a/pkg/sentry/fsimpl/devtmpfs/BUILD b/pkg/sentry/fsimpl/devtmpfs/BUILD
deleted file mode 100644
index e49a04c1b..000000000
--- a/pkg/sentry/fsimpl/devtmpfs/BUILD
+++ /dev/null
@@ -1,37 +0,0 @@
-load("//tools:defs.bzl", "go_library", "go_test")
-
-licenses(["notice"])
-
-go_library(
- name = "devtmpfs",
- srcs = [
- "devtmpfs.go",
- "save_restore.go",
- ],
- visibility = ["//pkg/sentry:internal"],
- deps = [
- "//pkg/abi/linux",
- "//pkg/context",
- "//pkg/fspath",
- "//pkg/sentry/fsimpl/tmpfs",
- "//pkg/sentry/kernel/auth",
- "//pkg/sentry/vfs",
- "//pkg/sync",
- ],
-)
-
-go_test(
- name = "devtmpfs_test",
- size = "small",
- srcs = ["devtmpfs_test.go"],
- library = ":devtmpfs",
- deps = [
- "//pkg/abi/linux",
- "//pkg/context",
- "//pkg/fspath",
- "//pkg/sentry/contexttest",
- "//pkg/sentry/fsimpl/tmpfs",
- "//pkg/sentry/kernel/auth",
- "//pkg/sentry/vfs",
- ],
-)
diff --git a/pkg/sentry/fsimpl/devtmpfs/devtmpfs_state_autogen.go b/pkg/sentry/fsimpl/devtmpfs/devtmpfs_state_autogen.go
new file mode 100644
index 000000000..900c7d8fe
--- /dev/null
+++ b/pkg/sentry/fsimpl/devtmpfs/devtmpfs_state_autogen.go
@@ -0,0 +1,41 @@
+// automatically generated by stateify.
+
+package devtmpfs
+
+import (
+ "gvisor.dev/gvisor/pkg/state"
+)
+
+func (fst *FilesystemType) StateTypeName() string {
+ return "pkg/sentry/fsimpl/devtmpfs.FilesystemType"
+}
+
+func (fst *FilesystemType) StateFields() []string {
+ return []string{
+ "initErr",
+ "fs",
+ "root",
+ }
+}
+
+func (fst *FilesystemType) beforeSave() {}
+
+// +checklocksignore
+func (fst *FilesystemType) StateSave(stateSinkObject state.Sink) {
+ fst.beforeSave()
+ stateSinkObject.Save(0, &fst.initErr)
+ stateSinkObject.Save(1, &fst.fs)
+ stateSinkObject.Save(2, &fst.root)
+}
+
+// +checklocksignore
+func (fst *FilesystemType) StateLoad(stateSourceObject state.Source) {
+ stateSourceObject.Load(0, &fst.initErr)
+ stateSourceObject.Load(1, &fst.fs)
+ stateSourceObject.Load(2, &fst.root)
+ stateSourceObject.AfterLoad(fst.afterLoad)
+}
+
+func init() {
+ state.Register((*FilesystemType)(nil))
+}
diff --git a/pkg/sentry/fsimpl/devtmpfs/devtmpfs_test.go b/pkg/sentry/fsimpl/devtmpfs/devtmpfs_test.go
deleted file mode 100644
index e058eda7a..000000000
--- a/pkg/sentry/fsimpl/devtmpfs/devtmpfs_test.go
+++ /dev/null
@@ -1,230 +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 devtmpfs
-
-import (
- "path"
- "testing"
-
- "gvisor.dev/gvisor/pkg/abi/linux"
- "gvisor.dev/gvisor/pkg/context"
- "gvisor.dev/gvisor/pkg/fspath"
- "gvisor.dev/gvisor/pkg/sentry/contexttest"
- "gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs"
- "gvisor.dev/gvisor/pkg/sentry/kernel/auth"
- "gvisor.dev/gvisor/pkg/sentry/vfs"
-)
-
-const devPath = "/dev"
-
-func setupDevtmpfs(t *testing.T) (context.Context, *auth.Credentials, *vfs.VirtualFilesystem, vfs.VirtualDentry, func()) {
- t.Helper()
-
- ctx := contexttest.Context(t)
- creds := auth.CredentialsFromContext(ctx)
- vfsObj := &vfs.VirtualFilesystem{}
- if err := vfsObj.Init(ctx); err != nil {
- t.Fatalf("VFS init: %v", err)
- }
- // Register tmpfs just so that we can have a root filesystem that isn't
- // devtmpfs.
- vfsObj.MustRegisterFilesystemType("tmpfs", tmpfs.FilesystemType{}, &vfs.RegisterFilesystemTypeOptions{
- AllowUserMount: true,
- })
- vfsObj.MustRegisterFilesystemType("devtmpfs", &FilesystemType{}, &vfs.RegisterFilesystemTypeOptions{
- AllowUserMount: true,
- })
-
- // Create a test mount namespace with devtmpfs mounted at "/dev".
- mntns, err := vfsObj.NewMountNamespace(ctx, creds, "tmpfs" /* source */, "tmpfs" /* fsTypeName */, &vfs.MountOptions{})
- if err != nil {
- t.Fatalf("failed to create tmpfs root mount: %v", err)
- }
- root := mntns.Root()
- root.IncRef()
- devpop := vfs.PathOperation{
- Root: root,
- Start: root,
- Path: fspath.Parse(devPath),
- }
- if err := vfsObj.MkdirAt(ctx, creds, &devpop, &vfs.MkdirOptions{
- Mode: 0755,
- }); err != nil {
- t.Fatalf("failed to create mount point: %v", err)
- }
- if _, err := vfsObj.MountAt(ctx, creds, "devtmpfs" /* source */, &devpop, "devtmpfs" /* fsTypeName */, &vfs.MountOptions{}); err != nil {
- t.Fatalf("failed to mount devtmpfs: %v", err)
- }
-
- return ctx, creds, vfsObj, root, func() {
- root.DecRef(ctx)
- mntns.DecRef(ctx)
- }
-}
-
-func TestUserspaceInit(t *testing.T) {
- ctx, creds, vfsObj, root, cleanup := setupDevtmpfs(t)
- defer cleanup()
-
- a, err := NewAccessor(ctx, vfsObj, creds, "devtmpfs")
- if err != nil {
- t.Fatalf("failed to create devtmpfs.Accessor: %v", err)
- }
- defer a.Release(ctx)
-
- // Create "userspace-initialized" files using a devtmpfs.Accessor.
- if err := a.UserspaceInit(ctx); err != nil {
- t.Fatalf("failed to userspace-initialize devtmpfs: %v", err)
- }
-
- // Created files should be visible in the test mount namespace.
- links := []struct {
- source string
- target string
- }{
- {
- source: "fd",
- target: "/proc/self/fd",
- },
- {
- source: "stdin",
- target: "/proc/self/fd/0",
- },
- {
- source: "stdout",
- target: "/proc/self/fd/1",
- },
- {
- source: "stderr",
- target: "/proc/self/fd/2",
- },
- {
- source: "ptmx",
- target: "pts/ptmx",
- },
- }
-
- for _, link := range links {
- abspath := path.Join(devPath, link.source)
- if gotTarget, err := vfsObj.ReadlinkAt(ctx, creds, &vfs.PathOperation{
- Root: root,
- Start: root,
- Path: fspath.Parse(abspath),
- }); err != nil || gotTarget != link.target {
- t.Errorf("readlink(%q): got (%q, %v), wanted (%q, nil)", abspath, gotTarget, err, link.target)
- }
- }
-
- dirs := []string{"shm", "pts"}
- for _, dir := range dirs {
- abspath := path.Join(devPath, dir)
- statx, err := vfsObj.StatAt(ctx, creds, &vfs.PathOperation{
- Root: root,
- Start: root,
- Path: fspath.Parse(abspath),
- }, &vfs.StatOptions{
- Mask: linux.STATX_MODE,
- })
- if err != nil {
- t.Errorf("stat(%q): got error %v ", abspath, err)
- continue
- }
- if want := uint16(0755) | linux.S_IFDIR; statx.Mode != want {
- t.Errorf("stat(%q): got mode %x, want %x", abspath, statx.Mode, want)
- }
- }
-}
-
-func TestCreateDeviceFile(t *testing.T) {
- ctx, creds, vfsObj, root, cleanup := setupDevtmpfs(t)
- defer cleanup()
-
- a, err := NewAccessor(ctx, vfsObj, creds, "devtmpfs")
- if err != nil {
- t.Fatalf("failed to create devtmpfs.Accessor: %v", err)
- }
- defer a.Release(ctx)
-
- devFiles := []struct {
- path string
- kind vfs.DeviceKind
- major uint32
- minor uint32
- perms uint16
- }{
- {
- path: "dummy",
- kind: vfs.CharDevice,
- major: 12,
- minor: 34,
- perms: 0600,
- },
- {
- path: "foo/bar",
- kind: vfs.BlockDevice,
- major: 13,
- minor: 35,
- perms: 0660,
- },
- {
- path: "foo/baz",
- kind: vfs.CharDevice,
- major: 12,
- minor: 40,
- perms: 0666,
- },
- {
- path: "a/b/c/d/e",
- kind: vfs.BlockDevice,
- major: 12,
- minor: 34,
- perms: 0600,
- },
- }
-
- for _, f := range devFiles {
- if err := a.CreateDeviceFile(ctx, f.path, f.kind, f.major, f.minor, f.perms); err != nil {
- t.Fatalf("failed to create device file: %v", err)
- }
- // The device special file should be visible in the test mount namespace.
- abspath := path.Join(devPath, f.path)
- stat, err := vfsObj.StatAt(ctx, creds, &vfs.PathOperation{
- Root: root,
- Start: root,
- Path: fspath.Parse(abspath),
- }, &vfs.StatOptions{
- Mask: linux.STATX_TYPE | linux.STATX_MODE,
- })
- if err != nil {
- t.Fatalf("failed to stat device file at %q: %v", abspath, err)
- }
- if stat.RdevMajor != f.major {
- t.Errorf("major device number: got %v, wanted %v", stat.RdevMajor, f.major)
- }
- if stat.RdevMinor != f.minor {
- t.Errorf("minor device number: got %v, wanted %v", stat.RdevMinor, f.minor)
- }
- wantMode := f.perms
- switch f.kind {
- case vfs.CharDevice:
- wantMode |= linux.S_IFCHR
- case vfs.BlockDevice:
- wantMode |= linux.S_IFBLK
- }
- if stat.Mode != wantMode {
- t.Errorf("device file mode: got %v, wanted %v", stat.Mode, wantMode)
- }
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 09:56:21 +0000