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Refactor verity test for readability 

1. Add getD/getDentry methods to avoid long casting line in each test
2. Factor all calls to vfs.OpenAt/UnlinkAt/RenameAt on lower filesystem
   to their own method (for both lower file and lower Merkle file) so
   the tests are more readable
3. Add descriptive test names for delete/remove tests

PiperOrigin-RevId: 343540202
This commit is contained in:
Chong Cai 2020-11-20 12:13:59 -08:00 committed by gVisor bot
parent ed8185fc75
commit 60ae6c4d83
1 changed files with 144 additions and 164 deletions
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308
pkg/sentry/fsimpl/verity/verity_test.go
View File

@ -41,6 +41,16 @@ const rootMerkleFilename = "root.verity"
// maxDataSize is the maximum data size written to the file for test.
const maxDataSize = 100000
// getD returns a *dentry corresponding to VD.
func getD(t *testing.T, vd vfs.VirtualDentry) *dentry {
t.Helper()
d, ok := vd.Dentry().Impl().(*dentry)
if !ok {
t.Fatalf("can't assert %T as a *dentry", vd)
}
return d
}
// newVerityRoot creates a new verity mount, and returns the root. The
// underlying file system is tmpfs. If the error is not nil, then cleanup
// should be called when the root is no longer needed.
@ -100,21 +110,101 @@ func newVerityRoot(t *testing.T, hashAlg HashAlgorithm) (*vfs.VirtualFilesystem,
return vfsObj, root, task, nil
}
// openVerityAt opens a verity file.
func openVerityAt(ctx context.Context, vfsObj *vfs.VirtualFilesystem, vd vfs.VirtualDentry, path string, flags uint32, mode linux.FileMode) (*vfs.FileDescription, error) {
return vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: vd,
Start: vd,
Path: fspath.Parse(path),
}, &vfs.OpenOptions{
Flags: flags,
Mode: mode,
})
}
// openLowerAt opens the file in the underlying file system.
func (d *dentry) openLowerAt(ctx context.Context, vfsObj *vfs.VirtualFilesystem, path string, flags uint32, mode linux.FileMode) (*vfs.FileDescription, error) {
return vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: d.lowerVD,
Start: d.lowerVD,
Path: fspath.Parse(path),
}, &vfs.OpenOptions{
Flags: flags,
Mode: mode,
})
}
// openLowerMerkleAt opens the Merkle file in the underlying file system.
func (d *dentry) openLowerMerkleAt(ctx context.Context, vfsObj *vfs.VirtualFilesystem, flags uint32, mode linux.FileMode) (*vfs.FileDescription, error) {
return vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: d.lowerMerkleVD,
Start: d.lowerMerkleVD,
}, &vfs.OpenOptions{
Flags: flags,
Mode: mode,
})
}
// unlinkLowerAt deletes the file in the underlying file system.
func (d *dentry) unlinkLowerAt(ctx context.Context, vfsObj *vfs.VirtualFilesystem, path string) error {
return vfsObj.UnlinkAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: d.lowerVD,
Start: d.lowerVD,
Path: fspath.Parse(path),
})
}
// unlinkLowerMerkleAt deletes the Merkle file in the underlying file system.
func (d *dentry) unlinkLowerMerkleAt(ctx context.Context, vfsObj *vfs.VirtualFilesystem, path string) error {
return vfsObj.UnlinkAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: d.lowerVD,
Start: d.lowerVD,
Path: fspath.Parse(merklePrefix + path),
})
}
// renameLowerAt renames file name to newName in the underlying file system.
func (d *dentry) renameLowerAt(ctx context.Context, vfsObj *vfs.VirtualFilesystem, name string, newName string) error {
return vfsObj.RenameAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: d.lowerVD,
Start: d.lowerVD,
Path: fspath.Parse(name),
}, &vfs.PathOperation{
Root: d.lowerVD,
Start: d.lowerVD,
Path: fspath.Parse(newName),
}, &vfs.RenameOptions{})
}
// renameLowerMerkleAt renames Merkle file name to newName in the underlying
// file system.
func (d *dentry) renameLowerMerkleAt(ctx context.Context, vfsObj *vfs.VirtualFilesystem, name string, newName string) error {
return vfsObj.RenameAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: d.lowerVD,
Start: d.lowerVD,
Path: fspath.Parse(merklePrefix + name),
}, &vfs.PathOperation{
Root: d.lowerVD,
Start: d.lowerVD,
Path: fspath.Parse(merklePrefix + newName),
}, &vfs.RenameOptions{})
}
// getDentry returns a *dentry corresponds to fd.
func getDentry(t *testing.T, fd *vfs.FileDescription) *dentry {
t.Helper()
f, ok := fd.Impl().(*fileDescription)
if !ok {
t.Fatalf("can't assert %T as a *fileDescription", fd)
}
return f.d
}
// newFileFD creates a new file in the verity mount, and returns the FD. The FD
// points to a file that has random data generated.
func newFileFD(ctx context.Context, vfsObj *vfs.VirtualFilesystem, root vfs.VirtualDentry, filePath string, mode linux.FileMode) (*vfs.FileDescription, int, error) {
creds := auth.CredentialsFromContext(ctx)
lowerRoot := root.Dentry().Impl().(*dentry).lowerVD
func newFileFD(ctx context.Context, t *testing.T, vfsObj *vfs.VirtualFilesystem, root vfs.VirtualDentry, filePath string, mode linux.FileMode) (*vfs.FileDescription, int, error) {
// Create the file in the underlying file system.
lowerFD, err := vfsObj.OpenAt(ctx, creds, &vfs.PathOperation{
Root: lowerRoot,
Start: lowerRoot,
Path: fspath.Parse(filePath),
}, &vfs.OpenOptions{
Flags: linux.O_RDWR | linux.O_CREAT | linux.O_EXCL,
Mode: linux.ModeRegular | mode,
})
lowerFD, err := getD(t, root).openLowerAt(ctx, vfsObj, filePath, linux.O_RDWR|linux.O_CREAT|linux.O_EXCL, linux.ModeRegular|mode)
if err != nil {
return nil, 0, err
}
@ -137,14 +227,7 @@ func newFileFD(ctx context.Context, vfsObj *vfs.VirtualFilesystem, root vfs.Virt
lowerFD.DecRef(ctx)
// Now open the verity file descriptor.
fd, err := vfsObj.OpenAt(ctx, creds, &vfs.PathOperation{
Root: root,
Start: root,
Path: fspath.Parse(filePath),
}, &vfs.OpenOptions{
Flags: linux.O_RDONLY,
Mode: linux.ModeRegular | mode,
})
fd, err := openVerityAt(ctx, vfsObj, root, filePath, linux.O_RDONLY, mode)
return fd, dataSize, err
}
@ -175,30 +258,18 @@ func TestOpen(t *testing.T) {
}
filename := "verity-test-file"
if _, _, err := newFileFD(ctx, vfsObj, root, filename, 0644); err != nil {
fd, _, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
// Ensure that the corresponding Merkle tree file is created.
lowerRoot := root.Dentry().Impl().(*dentry).lowerVD
if _, err = vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: lowerRoot,
Start: lowerRoot,
Path: fspath.Parse(merklePrefix + filename),
}, &vfs.OpenOptions{
Flags: linux.O_RDONLY,
}); err != nil {
if _, err = getDentry(t, fd).openLowerMerkleAt(ctx, vfsObj, linux.O_RDONLY, linux.ModeRegular); err != nil {
t.Errorf("OpenAt Merkle tree file %s: %v", merklePrefix+filename, err)
}
// Ensure the root merkle tree file is created.
if _, err = vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: lowerRoot,
Start: lowerRoot,
Path: fspath.Parse(merklePrefix + rootMerkleFilename),
}, &vfs.OpenOptions{
Flags: linux.O_RDONLY,
}); err != nil {
if _, err = getD(t, root).openLowerMerkleAt(ctx, vfsObj, linux.O_RDONLY, linux.ModeRegular); err != nil {
t.Errorf("OpenAt root Merkle tree file %s: %v", merklePrefix+rootMerkleFilename, err)
}
}
@ -214,7 +285,7 @@ func TestPReadUnmodifiedFileSucceeds(t *testing.T) {
}
filename := "verity-test-file"
fd, size, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, size, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -248,7 +319,7 @@ func TestReadUnmodifiedFileSucceeds(t *testing.T) {
}
filename := "verity-test-file"
fd, size, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, size, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -282,7 +353,7 @@ func TestReopenUnmodifiedFileSucceeds(t *testing.T) {
}
filename := "verity-test-file"
fd, _, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, _, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -295,14 +366,7 @@ func TestReopenUnmodifiedFileSucceeds(t *testing.T) {
}
// Ensure reopening the verity enabled file succeeds.
if _, err = vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: root,
Start: root,
Path: fspath.Parse(filename),
}, &vfs.OpenOptions{
Flags: linux.O_RDONLY,
Mode: linux.ModeRegular,
}); err != nil {
if _, err = openVerityAt(ctx, vfsObj, root, filename, linux.O_RDONLY, linux.ModeRegular); err != nil {
t.Errorf("reopen enabled file failed: %v", err)
}
}
@ -317,7 +381,7 @@ func TestOpenNonexistentFile(t *testing.T) {
}
filename := "verity-test-file"
fd, _, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, _, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -330,12 +394,7 @@ func TestOpenNonexistentFile(t *testing.T) {
}
// Enable verity on the parent directory.
parentFD, err := vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: root,
Start: root,
}, &vfs.OpenOptions{
Flags: linux.O_RDONLY,
})
parentFD, err := openVerityAt(ctx, vfsObj, root, "", linux.O_RDONLY, linux.ModeRegular)
if err != nil {
t.Fatalf("OpenAt: %v", err)
}
@ -346,14 +405,7 @@ func TestOpenNonexistentFile(t *testing.T) {
// Ensure open an unexpected file in the parent directory fails with
// ENOENT rather than verification failure.
if _, err = vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: root,
Start: root,
Path: fspath.Parse(filename + "abc"),
}, &vfs.OpenOptions{
Flags: linux.O_RDONLY,
Mode: linux.ModeRegular,
}); err != syserror.ENOENT {
if _, err = openVerityAt(ctx, vfsObj, root, filename+"abc", linux.O_RDONLY, linux.ModeRegular); err != syserror.ENOENT {
t.Errorf("OpenAt unexpected error: %v", err)
}
}
@ -368,7 +420,7 @@ func TestPReadModifiedFileFails(t *testing.T) {
}
filename := "verity-test-file"
fd, size, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, size, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -381,14 +433,7 @@ func TestPReadModifiedFileFails(t *testing.T) {
}
// Open a new lowerFD that's read/writable.
lowerVD := fd.Impl().(*fileDescription).d.lowerVD
lowerFD, err := vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: lowerVD,
Start: lowerVD,
}, &vfs.OpenOptions{
Flags: linux.O_RDWR,
})
lowerFD, err := getDentry(t, fd).openLowerAt(ctx, vfsObj, "", linux.O_RDWR, linux.ModeRegular)
if err != nil {
t.Fatalf("OpenAt: %v", err)
}
@ -415,7 +460,7 @@ func TestReadModifiedFileFails(t *testing.T) {
}
filename := "verity-test-file"
fd, size, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, size, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -428,14 +473,7 @@ func TestReadModifiedFileFails(t *testing.T) {
}
// Open a new lowerFD that's read/writable.
lowerVD := fd.Impl().(*fileDescription).d.lowerVD
lowerFD, err := vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: lowerVD,
Start: lowerVD,
}, &vfs.OpenOptions{
Flags: linux.O_RDWR,
})
lowerFD, err := getDentry(t, fd).openLowerAt(ctx, vfsObj, "", linux.O_RDWR, linux.ModeRegular)
if err != nil {
t.Fatalf("OpenAt: %v", err)
}
@ -462,7 +500,7 @@ func TestModifiedMerkleFails(t *testing.T) {
}
filename := "verity-test-file"
fd, size, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, size, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -475,14 +513,7 @@ func TestModifiedMerkleFails(t *testing.T) {
}
// Open a new lowerMerkleFD that's read/writable.
lowerMerkleVD := fd.Impl().(*fileDescription).d.lowerMerkleVD
lowerMerkleFD, err := vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: lowerMerkleVD,
Start: lowerMerkleVD,
}, &vfs.OpenOptions{
Flags: linux.O_RDWR,
})
lowerMerkleFD, err := getDentry(t, fd).openLowerMerkleAt(ctx, vfsObj, linux.O_RDWR, linux.ModeRegular)
if err != nil {
t.Fatalf("OpenAt: %v", err)
}
@ -517,7 +548,7 @@ func TestModifiedParentMerkleFails(t *testing.T) {
}
filename := "verity-test-file"
fd, _, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, _, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -530,12 +561,7 @@ func TestModifiedParentMerkleFails(t *testing.T) {
}
// Enable verity on the parent directory.
parentFD, err := vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: root,
Start: root,
}, &vfs.OpenOptions{
Flags: linux.O_RDONLY,
})
parentFD, err := openVerityAt(ctx, vfsObj, root, "", linux.O_RDONLY, linux.ModeRegular)
if err != nil {
t.Fatalf("OpenAt: %v", err)
}
@ -545,14 +571,7 @@ func TestModifiedParentMerkleFails(t *testing.T) {
}
// Open a new lowerMerkleFD that's read/writable.
parentLowerMerkleVD := fd.Impl().(*fileDescription).d.parent.lowerMerkleVD
parentLowerMerkleFD, err := vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: parentLowerMerkleVD,
Start: parentLowerMerkleVD,
}, &vfs.OpenOptions{
Flags: linux.O_RDWR,
})
parentLowerMerkleFD, err := getDentry(t, fd).parent.openLowerMerkleAt(ctx, vfsObj, linux.O_RDWR, linux.ModeRegular)
if err != nil {
t.Fatalf("OpenAt: %v", err)
}
@ -579,14 +598,7 @@ func TestModifiedParentMerkleFails(t *testing.T) {
parentLowerMerkleFD.DecRef(ctx)
// Ensure reopening the verity enabled file fails.
if _, err = vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: root,
Start: root,
Path: fspath.Parse(filename),
}, &vfs.OpenOptions{
Flags: linux.O_RDONLY,
Mode: linux.ModeRegular,
}); err == nil {
if _, err = openVerityAt(ctx, vfsObj, root, filename, linux.O_RDONLY, linux.ModeRegular); err == nil {
t.Errorf("OpenAt file with modified parent Merkle succeeded")
}
}
@ -602,7 +614,7 @@ func TestUnmodifiedStatSucceeds(t *testing.T) {
}
filename := "verity-test-file"
fd, _, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, _, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -630,7 +642,7 @@ func TestModifiedStatFails(t *testing.T) {
}
filename := "verity-test-file"
fd, _, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, _, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -663,33 +675,37 @@ func TestModifiedStatFails(t *testing.T) {
// and/or the corresponding Merkle tree file fails with the verity error.
func TestOpenDeletedFileFails(t *testing.T) {
testCases := []struct {
name string
// The original file is removed if changeFile is true.
changeFile bool
// The Merkle tree file is removed if changeMerkleFile is true.
changeMerkleFile bool
}{
{
name: "FileOnly",
changeFile: true,
changeMerkleFile: false,
},
{
name: "MerkleOnly",
changeFile: false,
changeMerkleFile: true,
},
{
name: "FileAndMerkle",
changeFile: true,
changeMerkleFile: true,
},
}
for _, tc := range testCases {
t.Run(fmt.Sprintf("changeFile:%t, changeMerkleFile:%t", tc.changeFile, tc.changeMerkleFile), func(t *testing.T) {
t.Run(tc.name, func(t *testing.T) {
vfsObj, root, ctx, err := newVerityRoot(t, SHA256)
if err != nil {
t.Fatalf("newVerityRoot: %v", err)
}
filename := "verity-test-file"
fd, _, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, _, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -701,35 +717,19 @@ func TestOpenDeletedFileFails(t *testing.T) {
t.Fatalf("Ioctl: %v", err)
}
rootLowerVD := root.Dentry().Impl().(*dentry).lowerVD
if tc.changeFile {
if err := vfsObj.UnlinkAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: rootLowerVD,
Start: rootLowerVD,
Path: fspath.Parse(filename),
}); err != nil {
if err := getD(t, root).unlinkLowerAt(ctx, vfsObj, filename); err != nil {
t.Fatalf("UnlinkAt: %v", err)
}
}
if tc.changeMerkleFile {
if err := vfsObj.UnlinkAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: rootLowerVD,
Start: rootLowerVD,
Path: fspath.Parse(merklePrefix + filename),
}); err != nil {
if err := getD(t, root).unlinkLowerMerkleAt(ctx, vfsObj, filename); err != nil {
t.Fatalf("UnlinkAt: %v", err)
}
}
// Ensure reopening the verity enabled file fails.
if _, err = vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: root,
Start: root,
Path: fspath.Parse(filename),
}, &vfs.OpenOptions{
Flags: linux.O_RDONLY,
Mode: linux.ModeRegular,
}); err != syserror.EIO {
if _, err = openVerityAt(ctx, vfsObj, root, filename, linux.O_RDONLY, linux.ModeRegular); err != syserror.EIO {
t.Errorf("got OpenAt error: %v, expected EIO", err)
}
})
@ -740,33 +740,37 @@ func TestOpenDeletedFileFails(t *testing.T) {
// and/or the corresponding Merkle tree file fails with the verity error.
func TestOpenRenamedFileFails(t *testing.T) {
testCases := []struct {
name string
// The original file is renamed if changeFile is true.
changeFile bool
// The Merkle tree file is renamed if changeMerkleFile is true.
changeMerkleFile bool
}{
{
name: "FileOnly",
changeFile: true,
changeMerkleFile: false,
},
{
name: "MerkleOnly",
changeFile: false,
changeMerkleFile: true,
},
{
name: "FileAndMerkle",
changeFile: true,
changeMerkleFile: true,
},
}
for _, tc := range testCases {
t.Run(fmt.Sprintf("changeFile:%t, changeMerkleFile:%t", tc.changeFile, tc.changeMerkleFile), func(t *testing.T) {
t.Run(tc.name, func(t *testing.T) {
vfsObj, root, ctx, err := newVerityRoot(t, SHA256)
if err != nil {
t.Fatalf("newVerityRoot: %v", err)
}
filename := "verity-test-file"
fd, _, err := newFileFD(ctx, vfsObj, root, filename, 0644)
fd, _, err := newFileFD(ctx, t, vfsObj, root, filename, 0644)
if err != nil {
t.Fatalf("newFileFD: %v", err)
}
@ -778,44 +782,20 @@ func TestOpenRenamedFileFails(t *testing.T) {
t.Fatalf("Ioctl: %v", err)
}
rootLowerVD := root.Dentry().Impl().(*dentry).lowerVD
newFilename := "renamed-test-file"
if tc.changeFile {
if err := vfsObj.RenameAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: rootLowerVD,
Start: rootLowerVD,
Path: fspath.Parse(filename),
}, &vfs.PathOperation{
Root: rootLowerVD,
Start: rootLowerVD,
Path: fspath.Parse(newFilename),
}, &vfs.RenameOptions{}); err != nil {
if err := getD(t, root).renameLowerAt(ctx, vfsObj, filename, newFilename); err != nil {
t.Fatalf("RenameAt: %v", err)
}
}
if tc.changeMerkleFile {
if err := vfsObj.RenameAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: rootLowerVD,
Start: rootLowerVD,
Path: fspath.Parse(merklePrefix + filename),
}, &vfs.PathOperation{
Root: rootLowerVD,
Start: rootLowerVD,
Path: fspath.Parse(merklePrefix + newFilename),
}, &vfs.RenameOptions{}); err != nil {
if err := getD(t, root).renameLowerMerkleAt(ctx, vfsObj, filename, newFilename); err != nil {
t.Fatalf("UnlinkAt: %v", err)
}
}
// Ensure reopening the verity enabled file fails.
if _, err = vfsObj.OpenAt(ctx, auth.CredentialsFromContext(ctx), &vfs.PathOperation{
Root: root,
Start: root,
Path: fspath.Parse(filename),
}, &vfs.OpenOptions{
Flags: linux.O_RDONLY,
Mode: linux.ModeRegular,
}); err != syserror.EIO {
if _, err = openVerityAt(ctx, vfsObj, root, filename, linux.O_RDONLY, linux.ModeRegular); err != syserror.EIO {
t.Errorf("got OpenAt error: %v, expected EIO", err)
}
})