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-rw-r--r--pkg/sentry/fs/ext/ext_test.go621
1 files changed, 0 insertions, 621 deletions
diff --git a/pkg/sentry/fs/ext/ext_test.go b/pkg/sentry/fs/ext/ext_test.go
deleted file mode 100644
index 0b8311544..000000000
--- a/pkg/sentry/fs/ext/ext_test.go
+++ /dev/null
@@ -1,621 +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 ext
-
-import (
- "fmt"
- "io"
- "os"
- "path"
- "sort"
- "testing"
-
- "github.com/google/go-cmp/cmp"
- "gvisor.dev/gvisor/pkg/abi/linux"
- "gvisor.dev/gvisor/pkg/sentry/context"
- "gvisor.dev/gvisor/pkg/sentry/context/contexttest"
- "gvisor.dev/gvisor/pkg/sentry/fs/ext/disklayout"
- "gvisor.dev/gvisor/pkg/sentry/kernel/auth"
- "gvisor.dev/gvisor/pkg/sentry/usermem"
- "gvisor.dev/gvisor/pkg/sentry/vfs"
-
- "gvisor.dev/gvisor/runsc/test/testutil"
-)
-
-const (
- assetsDir = "pkg/sentry/fs/ext/assets"
-)
-
-var (
- ext2ImagePath = path.Join(assetsDir, "tiny.ext2")
- ext3ImagePath = path.Join(assetsDir, "tiny.ext3")
- ext4ImagePath = path.Join(assetsDir, "tiny.ext4")
-)
-
-// setUp opens imagePath as an ext Filesystem and returns all necessary
-// elements required to run tests. If error is non-nil, it also returns a tear
-// down function which must be called after the test is run for clean up.
-func setUp(t *testing.T, imagePath string) (context.Context, *vfs.VirtualFilesystem, *vfs.VirtualDentry, func(), error) {
- localImagePath, err := testutil.FindFile(imagePath)
- if err != nil {
- return nil, nil, nil, nil, fmt.Errorf("failed to open local image at path %s: %v", imagePath, err)
- }
-
- f, err := os.Open(localImagePath)
- if err != nil {
- return nil, nil, nil, nil, err
- }
-
- ctx := contexttest.Context(t)
- creds := auth.CredentialsFromContext(ctx)
-
- // Create VFS.
- vfsObj := vfs.New()
- vfsObj.MustRegisterFilesystemType("extfs", filesystemType{})
- mntns, err := vfsObj.NewMountNamespace(ctx, creds, localImagePath, "extfs", &vfs.NewFilesystemOptions{InternalData: int(f.Fd())})
- if err != nil {
- f.Close()
- return nil, nil, nil, nil, err
- }
-
- root := mntns.Root()
-
- tearDown := func() {
- root.DecRef()
-
- if err := f.Close(); err != nil {
- t.Fatalf("tearDown failed: %v", err)
- }
- }
- return ctx, vfsObj, &root, tearDown, nil
-}
-
-// TestRead tests the read functionality for vfs file descriptions.
-func TestRead(t *testing.T) {
- type readTest struct {
- name string
- image string
- absPath string
- }
-
- tests := []readTest{
- {
- name: "ext4 read small file",
- image: ext4ImagePath,
- absPath: "/file.txt",
- },
- {
- name: "ext3 read small file",
- image: ext3ImagePath,
- absPath: "/file.txt",
- },
- {
- name: "ext2 read small file",
- image: ext2ImagePath,
- absPath: "/file.txt",
- },
- {
- name: "ext4 read big file",
- image: ext4ImagePath,
- absPath: "/bigfile.txt",
- },
- {
- name: "ext3 read big file",
- image: ext3ImagePath,
- absPath: "/bigfile.txt",
- },
- {
- name: "ext2 read big file",
- image: ext2ImagePath,
- absPath: "/bigfile.txt",
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ctx, vfsfs, root, tearDown, err := setUp(t, test.image)
- if err != nil {
- t.Fatalf("setUp failed: %v", err)
- }
- defer tearDown()
-
- fd, err := vfsfs.OpenAt(
- ctx,
- auth.CredentialsFromContext(ctx),
- &vfs.PathOperation{Root: *root, Start: *root, Pathname: test.absPath},
- &vfs.OpenOptions{},
- )
- if err != nil {
- t.Fatalf("vfsfs.OpenAt failed: %v", err)
- }
-
- // Get a local file descriptor and compare its functionality with a vfs file
- // description for the same file.
- localFile, err := testutil.FindFile(path.Join(assetsDir, test.absPath))
- if err != nil {
- t.Fatalf("testutil.FindFile failed for %s: %v", test.absPath, err)
- }
-
- f, err := os.Open(localFile)
- if err != nil {
- t.Fatalf("os.Open failed for %s: %v", localFile, err)
- }
- defer f.Close()
-
- // Read the entire file by reading one byte repeatedly. Doing this stress
- // tests the underlying file reader implementation.
- got := make([]byte, 1)
- want := make([]byte, 1)
- for {
- n, err := f.Read(want)
- fd.Impl().Read(ctx, usermem.BytesIOSequence(got), vfs.ReadOptions{})
-
- if diff := cmp.Diff(got, want); diff != "" {
- t.Errorf("file data mismatch (-want +got):\n%s", diff)
- }
-
- // Make sure there is no more file data left after getting EOF.
- if n == 0 || err == io.EOF {
- if n, _ := fd.Impl().Read(ctx, usermem.BytesIOSequence(got), vfs.ReadOptions{}); n != 0 {
- t.Errorf("extra unexpected file data in file %s in image %s", test.absPath, test.image)
- }
-
- break
- }
-
- if err != nil {
- t.Fatalf("read failed: %v", err)
- }
- }
- })
- }
-}
-
-// iterDirentsCb is a simple callback which just keeps adding the dirents to an
-// internal list. Implements vfs.IterDirentsCallback.
-type iterDirentsCb struct {
- dirents []vfs.Dirent
-}
-
-// Compiles only if iterDirentCb implements vfs.IterDirentsCallback.
-var _ vfs.IterDirentsCallback = (*iterDirentsCb)(nil)
-
-// newIterDirentsCb is the iterDirent
-func newIterDirentCb() *iterDirentsCb {
- return &iterDirentsCb{dirents: make([]vfs.Dirent, 0)}
-}
-
-// Handle implements vfs.IterDirentsCallback.Handle.
-func (cb *iterDirentsCb) Handle(dirent vfs.Dirent) bool {
- cb.dirents = append(cb.dirents, dirent)
- return true
-}
-
-// TestIterDirents tests the FileDescriptionImpl.IterDirents functionality.
-func TestIterDirents(t *testing.T) {
- type iterDirentTest struct {
- name string
- image string
- path string
- want []vfs.Dirent
- }
-
- wantDirents := []vfs.Dirent{
- vfs.Dirent{
- Name: ".",
- Type: linux.DT_DIR,
- },
- vfs.Dirent{
- Name: "..",
- Type: linux.DT_DIR,
- },
- vfs.Dirent{
- Name: "lost+found",
- Type: linux.DT_DIR,
- },
- vfs.Dirent{
- Name: "file.txt",
- Type: linux.DT_REG,
- },
- vfs.Dirent{
- Name: "bigfile.txt",
- Type: linux.DT_REG,
- },
- vfs.Dirent{
- Name: "symlink.txt",
- Type: linux.DT_LNK,
- },
- }
- tests := []iterDirentTest{
- {
- name: "ext4 root dir iteration",
- image: ext4ImagePath,
- path: "/",
- want: wantDirents,
- },
- {
- name: "ext3 root dir iteration",
- image: ext3ImagePath,
- path: "/",
- want: wantDirents,
- },
- {
- name: "ext2 root dir iteration",
- image: ext2ImagePath,
- path: "/",
- want: wantDirents,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ctx, vfsfs, root, tearDown, err := setUp(t, test.image)
- if err != nil {
- t.Fatalf("setUp failed: %v", err)
- }
- defer tearDown()
-
- fd, err := vfsfs.OpenAt(
- ctx,
- auth.CredentialsFromContext(ctx),
- &vfs.PathOperation{Root: *root, Start: *root, Pathname: test.path},
- &vfs.OpenOptions{},
- )
- if err != nil {
- t.Fatalf("vfsfs.OpenAt failed: %v", err)
- }
-
- cb := &iterDirentsCb{}
- if err = fd.Impl().IterDirents(ctx, cb); err != nil {
- t.Fatalf("dir fd.IterDirents() failed: %v", err)
- }
-
- sort.Slice(cb.dirents, func(i int, j int) bool { return cb.dirents[i].Name < cb.dirents[j].Name })
- sort.Slice(test.want, func(i int, j int) bool { return test.want[i].Name < test.want[j].Name })
-
- // Ignore the inode number and offset of dirents because those are likely to
- // change as the underlying image changes.
- cmpIgnoreFields := cmp.FilterPath(func(p cmp.Path) bool {
- return p.String() == "Ino" || p.String() == "Off"
- }, cmp.Ignore())
- if diff := cmp.Diff(cb.dirents, test.want, cmpIgnoreFields); diff != "" {
- t.Errorf("dirents mismatch (-want +got):\n%s", diff)
- }
- })
- }
-}
-
-// TestRootDir tests that the root directory inode is correctly initialized and
-// returned from setUp.
-func TestRootDir(t *testing.T) {
- type inodeProps struct {
- Mode linux.FileMode
- UID auth.KUID
- GID auth.KGID
- Size uint64
- InodeSize uint16
- Links uint16
- Flags disklayout.InodeFlags
- }
-
- type rootDirTest struct {
- name string
- image string
- wantInode inodeProps
- }
-
- tests := []rootDirTest{
- {
- name: "ext4 root dir",
- image: ext4ImagePath,
- wantInode: inodeProps{
- Mode: linux.ModeDirectory | 0755,
- Size: 0x400,
- InodeSize: 0x80,
- Links: 3,
- Flags: disklayout.InodeFlags{Extents: true},
- },
- },
- {
- name: "ext3 root dir",
- image: ext3ImagePath,
- wantInode: inodeProps{
- Mode: linux.ModeDirectory | 0755,
- Size: 0x400,
- InodeSize: 0x80,
- Links: 3,
- },
- },
- {
- name: "ext2 root dir",
- image: ext2ImagePath,
- wantInode: inodeProps{
- Mode: linux.ModeDirectory | 0755,
- Size: 0x400,
- InodeSize: 0x80,
- Links: 3,
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- _, _, vd, tearDown, err := setUp(t, test.image)
- if err != nil {
- t.Fatalf("setUp failed: %v", err)
- }
- defer tearDown()
-
- d, ok := vd.Dentry().Impl().(*dentry)
- if !ok {
- t.Fatalf("ext dentry of incorrect type: %T", vd.Dentry().Impl())
- }
-
- // Offload inode contents into local structs for comparison.
- gotInode := inodeProps{
- Mode: d.inode.diskInode.Mode(),
- UID: d.inode.diskInode.UID(),
- GID: d.inode.diskInode.GID(),
- Size: d.inode.diskInode.Size(),
- InodeSize: d.inode.diskInode.InodeSize(),
- Links: d.inode.diskInode.LinksCount(),
- Flags: d.inode.diskInode.Flags(),
- }
-
- if diff := cmp.Diff(gotInode, test.wantInode); diff != "" {
- t.Errorf("inode mismatch (-want +got):\n%s", diff)
- }
- })
- }
-}
-
-// TestFilesystemInit tests that the filesystem superblock and block group
-// descriptors are correctly read in and initialized.
-func TestFilesystemInit(t *testing.T) {
- // sb only contains the immutable properties of the superblock.
- type sb struct {
- InodesCount uint32
- BlocksCount uint64
- MaxMountCount uint16
- FirstDataBlock uint32
- BlockSize uint64
- BlocksPerGroup uint32
- ClusterSize uint64
- ClustersPerGroup uint32
- InodeSize uint16
- InodesPerGroup uint32
- BgDescSize uint16
- Magic uint16
- Revision disklayout.SbRevision
- CompatFeatures disklayout.CompatFeatures
- IncompatFeatures disklayout.IncompatFeatures
- RoCompatFeatures disklayout.RoCompatFeatures
- }
-
- // bg only contains the immutable properties of the block group descriptor.
- type bg struct {
- InodeTable uint64
- BlockBitmap uint64
- InodeBitmap uint64
- ExclusionBitmap uint64
- Flags disklayout.BGFlags
- }
-
- type fsInitTest struct {
- name string
- image string
- wantSb sb
- wantBgs []bg
- }
-
- tests := []fsInitTest{
- {
- name: "ext4 filesystem init",
- image: ext4ImagePath,
- wantSb: sb{
- InodesCount: 0x10,
- BlocksCount: 0x40,
- MaxMountCount: 0xffff,
- FirstDataBlock: 0x1,
- BlockSize: 0x400,
- BlocksPerGroup: 0x2000,
- ClusterSize: 0x400,
- ClustersPerGroup: 0x2000,
- InodeSize: 0x80,
- InodesPerGroup: 0x10,
- BgDescSize: 0x40,
- Magic: linux.EXT_SUPER_MAGIC,
- Revision: disklayout.DynamicRev,
- CompatFeatures: disklayout.CompatFeatures{
- ExtAttr: true,
- ResizeInode: true,
- DirIndex: true,
- },
- IncompatFeatures: disklayout.IncompatFeatures{
- DirentFileType: true,
- Extents: true,
- Is64Bit: true,
- FlexBg: true,
- },
- RoCompatFeatures: disklayout.RoCompatFeatures{
- Sparse: true,
- LargeFile: true,
- HugeFile: true,
- DirNlink: true,
- ExtraIsize: true,
- MetadataCsum: true,
- },
- },
- wantBgs: []bg{
- {
- InodeTable: 0x23,
- BlockBitmap: 0x3,
- InodeBitmap: 0x13,
- Flags: disklayout.BGFlags{
- InodeZeroed: true,
- },
- },
- },
- },
- {
- name: "ext3 filesystem init",
- image: ext3ImagePath,
- wantSb: sb{
- InodesCount: 0x10,
- BlocksCount: 0x40,
- MaxMountCount: 0xffff,
- FirstDataBlock: 0x1,
- BlockSize: 0x400,
- BlocksPerGroup: 0x2000,
- ClusterSize: 0x400,
- ClustersPerGroup: 0x2000,
- InodeSize: 0x80,
- InodesPerGroup: 0x10,
- BgDescSize: 0x20,
- Magic: linux.EXT_SUPER_MAGIC,
- Revision: disklayout.DynamicRev,
- CompatFeatures: disklayout.CompatFeatures{
- ExtAttr: true,
- ResizeInode: true,
- DirIndex: true,
- },
- IncompatFeatures: disklayout.IncompatFeatures{
- DirentFileType: true,
- },
- RoCompatFeatures: disklayout.RoCompatFeatures{
- Sparse: true,
- LargeFile: true,
- },
- },
- wantBgs: []bg{
- {
- InodeTable: 0x5,
- BlockBitmap: 0x3,
- InodeBitmap: 0x4,
- Flags: disklayout.BGFlags{
- InodeZeroed: true,
- },
- },
- },
- },
- {
- name: "ext2 filesystem init",
- image: ext2ImagePath,
- wantSb: sb{
- InodesCount: 0x10,
- BlocksCount: 0x40,
- MaxMountCount: 0xffff,
- FirstDataBlock: 0x1,
- BlockSize: 0x400,
- BlocksPerGroup: 0x2000,
- ClusterSize: 0x400,
- ClustersPerGroup: 0x2000,
- InodeSize: 0x80,
- InodesPerGroup: 0x10,
- BgDescSize: 0x20,
- Magic: linux.EXT_SUPER_MAGIC,
- Revision: disklayout.DynamicRev,
- CompatFeatures: disklayout.CompatFeatures{
- ExtAttr: true,
- ResizeInode: true,
- DirIndex: true,
- },
- IncompatFeatures: disklayout.IncompatFeatures{
- DirentFileType: true,
- },
- RoCompatFeatures: disklayout.RoCompatFeatures{
- Sparse: true,
- LargeFile: true,
- },
- },
- wantBgs: []bg{
- {
- InodeTable: 0x5,
- BlockBitmap: 0x3,
- InodeBitmap: 0x4,
- Flags: disklayout.BGFlags{
- InodeZeroed: true,
- },
- },
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- _, _, vd, tearDown, err := setUp(t, test.image)
- if err != nil {
- t.Fatalf("setUp failed: %v", err)
- }
- defer tearDown()
-
- fs, ok := vd.Mount().Filesystem().Impl().(*filesystem)
- if !ok {
- t.Fatalf("ext filesystem of incorrect type: %T", vd.Mount().Filesystem().Impl())
- }
-
- // Offload superblock and block group descriptors contents into
- // local structs for comparison.
- totalFreeInodes := uint32(0)
- totalFreeBlocks := uint64(0)
- gotSb := sb{
- InodesCount: fs.sb.InodesCount(),
- BlocksCount: fs.sb.BlocksCount(),
- MaxMountCount: fs.sb.MaxMountCount(),
- FirstDataBlock: fs.sb.FirstDataBlock(),
- BlockSize: fs.sb.BlockSize(),
- BlocksPerGroup: fs.sb.BlocksPerGroup(),
- ClusterSize: fs.sb.ClusterSize(),
- ClustersPerGroup: fs.sb.ClustersPerGroup(),
- InodeSize: fs.sb.InodeSize(),
- InodesPerGroup: fs.sb.InodesPerGroup(),
- BgDescSize: fs.sb.BgDescSize(),
- Magic: fs.sb.Magic(),
- Revision: fs.sb.Revision(),
- CompatFeatures: fs.sb.CompatibleFeatures(),
- IncompatFeatures: fs.sb.IncompatibleFeatures(),
- RoCompatFeatures: fs.sb.ReadOnlyCompatibleFeatures(),
- }
- gotNumBgs := len(fs.bgs)
- gotBgs := make([]bg, gotNumBgs)
- for i := 0; i < gotNumBgs; i++ {
- gotBgs[i].InodeTable = fs.bgs[i].InodeTable()
- gotBgs[i].BlockBitmap = fs.bgs[i].BlockBitmap()
- gotBgs[i].InodeBitmap = fs.bgs[i].InodeBitmap()
- gotBgs[i].ExclusionBitmap = fs.bgs[i].ExclusionBitmap()
- gotBgs[i].Flags = fs.bgs[i].Flags()
-
- totalFreeInodes += fs.bgs[i].FreeInodesCount()
- totalFreeBlocks += uint64(fs.bgs[i].FreeBlocksCount())
- }
-
- if diff := cmp.Diff(gotSb, test.wantSb); diff != "" {
- t.Errorf("superblock mismatch (-want +got):\n%s", diff)
- }
-
- if diff := cmp.Diff(gotBgs, test.wantBgs); diff != "" {
- t.Errorf("block group descriptors mismatch (-want +got):\n%s", diff)
- }
-
- if diff := cmp.Diff(totalFreeInodes, fs.sb.FreeInodesCount()); diff != "" {
- t.Errorf("total free inodes mismatch (-want +got):\n%s", diff)
- }
-
- if diff := cmp.Diff(totalFreeBlocks, fs.sb.FreeBlocksCount()); diff != "" {
- t.Errorf("total free blocks mismatch (-want +got):\n%s", diff)
- }
- })
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-01 19:50:07 +0000