diff options
Diffstat (limited to 'runsc/fsgofer/fsgofer_test.go')
| -rw-r--r-- | runsc/fsgofer/fsgofer_test.go | 1122 |
1 files changed, 0 insertions, 1122 deletions
diff --git a/runsc/fsgofer/fsgofer_test.go b/runsc/fsgofer/fsgofer_test.go deleted file mode 100644 index 99ea9bd32..000000000 --- a/runsc/fsgofer/fsgofer_test.go +++ /dev/null @@ -1,1122 +0,0 @@ -// Copyright 2018 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 fsgofer - -import ( - "fmt" - "io/ioutil" - "net" - "os" - "path" - "path/filepath" - "testing" - - "github.com/syndtr/gocapability/capability" - "golang.org/x/sys/unix" - "gvisor.dev/gvisor/pkg/fd" - "gvisor.dev/gvisor/pkg/log" - "gvisor.dev/gvisor/pkg/p9" - "gvisor.dev/gvisor/pkg/test/testutil" - "gvisor.dev/gvisor/runsc/specutils" -) - -// Nodoby is the standard UID/GID for the nobody user/group. -const nobody = 65534 - -var allOpenFlags = []p9.OpenFlags{p9.ReadOnly, p9.WriteOnly, p9.ReadWrite} - -var ( - allTypes = []uint32{unix.S_IFREG, unix.S_IFDIR, unix.S_IFLNK} - - // allConfs is set in init(). - allConfs []Config - - rwConfs = []Config{{ROMount: false}} - roConfs = []Config{{ROMount: true}} -) - -func init() { - log.SetLevel(log.Debug) - - allConfs = append(allConfs, rwConfs...) - allConfs = append(allConfs, roConfs...) - - if err := OpenProcSelfFD(); err != nil { - panic(err) - } -} - -func configTestName(conf *Config) string { - if conf.ROMount { - return "ROMount" - } - return "RWMount" -} - -func assertPanic(t *testing.T, f func()) { - defer func() { - if r := recover(); r == nil { - t.Errorf("function did not panic") - } - }() - f() -} - -func testReadWrite(f p9.File, flags p9.OpenFlags, content []byte) error { - want := make([]byte, len(content)) - copy(want, content) - - b := []byte("test-1-2-3") - w, err := f.WriteAt(b, uint64(len(content))) - if flags == p9.WriteOnly || flags == p9.ReadWrite { - if err != nil { - return fmt.Errorf("WriteAt(): %v", err) - } - if w != len(b) { - return fmt.Errorf("WriteAt() was partial, got: %d, want: %d", w, len(b)) - } - want = append(want, b...) - } else { - if e, ok := err.(unix.Errno); !ok || e != unix.EBADF { - return fmt.Errorf("WriteAt() should have failed, got: %d, want: EBADFD", err) - } - } - - rBuf := make([]byte, len(want)) - r, err := f.ReadAt(rBuf, 0) - if flags == p9.ReadOnly || flags == p9.ReadWrite { - if err != nil { - return fmt.Errorf("ReadAt(): %v", err) - } - if r != len(rBuf) { - return fmt.Errorf("ReadAt() was partial, got: %d, want: %d", r, len(rBuf)) - } - if string(rBuf) != string(want) { - return fmt.Errorf("ReadAt() wrong data, got: %s, want: %s", string(rBuf), want) - } - } else { - if e, ok := err.(unix.Errno); !ok || e != unix.EBADF { - return fmt.Errorf("ReadAt() should have failed, got: %d, want: EBADFD", err) - } - } - return nil -} - -type state struct { - root *localFile - file *localFile - conf Config - fileType uint32 -} - -func (s state) String() string { - return fmt.Sprintf("type(%v)", s.fileType) -} - -func typeName(fileType uint32) string { - switch fileType { - case unix.S_IFREG: - return "file" - case unix.S_IFDIR: - return "directory" - case unix.S_IFLNK: - return "symlink" - default: - panic(fmt.Sprintf("invalid file type for test: %d", fileType)) - } -} - -func runAll(t *testing.T, test func(*testing.T, state)) { - runCustom(t, allTypes, allConfs, test) -} - -func runCustom(t *testing.T, types []uint32, confs []Config, test func(*testing.T, state)) { - for _, c := range confs { - for _, ft := range types { - name := fmt.Sprintf("%s/%s", configTestName(&c), typeName(ft)) - t.Run(name, func(t *testing.T) { - path, name, err := setup(ft) - if err != nil { - t.Fatalf("%v", err) - } - defer os.RemoveAll(path) - - a, err := NewAttachPoint(path, c) - if err != nil { - t.Fatalf("NewAttachPoint failed: %v", err) - } - root, err := a.Attach() - if err != nil { - t.Fatalf("Attach failed, err: %v", err) - } - - _, file, err := root.Walk([]string{name}) - if err != nil { - root.Close() - t.Fatalf("root.Walk({%q}) failed, err: %v", "symlink", err) - } - - st := state{ - root: root.(*localFile), - file: file.(*localFile), - conf: c, - fileType: ft, - } - test(t, st) - file.Close() - root.Close() - }) - } - } -} - -func setup(fileType uint32) (string, string, error) { - path, err := ioutil.TempDir(testutil.TmpDir(), "root-") - if err != nil { - return "", "", fmt.Errorf("ioutil.TempDir() failed, err: %v", err) - } - - // First attach with writable configuration to setup tree. - a, err := NewAttachPoint(path, Config{}) - if err != nil { - return "", "", err - } - root, err := a.Attach() - if err != nil { - return "", "", fmt.Errorf("Attach failed, err: %v", err) - } - defer root.Close() - - var name string - switch fileType { - case unix.S_IFREG: - name = "file" - fd, f, _, _, err := root.Create(name, p9.ReadWrite, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())) - if err != nil { - return "", "", fmt.Errorf("createFile(root, %q) failed, err: %v", "test", err) - } - if fd != nil { - fd.Close() - } - defer f.Close() - case unix.S_IFDIR: - name = "dir" - if _, err := root.Mkdir(name, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil { - return "", "", fmt.Errorf("root.MkDir(%q) failed, err: %v", name, err) - } - case unix.S_IFLNK: - name = "symlink" - if _, err := root.Symlink("/some/target", name, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil { - return "", "", fmt.Errorf("root.Symlink(%q) failed, err: %v", name, err) - } - default: - panic(fmt.Sprintf("unknown file type %v", fileType)) - } - return path, name, nil -} - -func createFile(dir *localFile, name string) (*localFile, error) { - _, f, _, _, err := dir.Create(name, p9.ReadWrite, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())) - if err != nil { - return nil, err - } - return f.(*localFile), nil -} - -func TestReadWrite(t *testing.T) { - runCustom(t, []uint32{unix.S_IFDIR}, rwConfs, func(t *testing.T, s state) { - child, err := createFile(s.file, "test") - if err != nil { - t.Fatalf("%v: createFile() failed, err: %v", s, err) - } - defer child.Close() - want := []byte("foobar") - w, err := child.WriteAt(want, 0) - if err != nil { - t.Fatalf("%v: Write() failed, err: %v", s, err) - } - if w != len(want) { - t.Fatalf("%v: Write() was partial, got: %d, expected: %d", s, w, len(want)) - } - for _, flags := range allOpenFlags { - _, l, err := s.file.Walk([]string{"test"}) - if err != nil { - t.Fatalf("%v: Walk(%s) failed, err: %v", s, "test", err) - } - fd, _, _, err := l.Open(flags) - if err != nil { - t.Fatalf("%v: Open(%v) failed, err: %v", s, flags, err) - } - if fd != nil { - defer fd.Close() - } - if err := testReadWrite(l, flags, want); err != nil { - t.Fatalf("%v: testReadWrite(%v) failed: %v", s, flags, err) - } - } - }) -} - -func TestCreate(t *testing.T) { - runCustom(t, []uint32{unix.S_IFDIR}, rwConfs, func(t *testing.T, s state) { - for i, flags := range allOpenFlags { - _, l, _, _, err := s.file.Create(fmt.Sprintf("test-%d", i), flags, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())) - if err != nil { - t.Fatalf("%v, %v: WriteAt() failed, err: %v", s, flags, err) - } - - if err := testReadWrite(l, flags, nil); err != nil { - t.Fatalf("%v: testReadWrite(%v) failed: %v", s, flags, err) - } - } - }) -} - -func checkIDs(f p9.File, uid, gid int) error { - _, _, stat, err := f.GetAttr(p9.AttrMask{UID: true, GID: true}) - if err != nil { - return fmt.Errorf("GetAttr() failed, err: %v", err) - } - if want := p9.UID(uid); stat.UID != want { - return fmt.Errorf("Wrong UID, want: %v, got: %v", want, stat.UID) - } - if want := p9.GID(gid); stat.GID != want { - return fmt.Errorf("Wrong GID, want: %v, got: %v", want, stat.GID) - } - return nil -} - -// TestCreateSetGID checks files/dirs/symlinks are created with the proper -// owner when the parent directory has setgid set, -func TestCreateSetGID(t *testing.T) { - if !specutils.HasCapabilities(capability.CAP_CHOWN) { - t.Skipf("Test requires CAP_CHOWN") - } - - runCustom(t, []uint32{unix.S_IFDIR}, rwConfs, func(t *testing.T, s state) { - // Change group and set setgid to the parent dir. - if err := unix.Chown(s.file.hostPath, os.Getuid(), nobody); err != nil { - t.Fatalf("Chown() failed: %v", err) - } - if err := unix.Chmod(s.file.hostPath, 02777); err != nil { - t.Fatalf("Chmod() failed: %v", err) - } - - t.Run("create", func(t *testing.T) { - _, l, _, _, err := s.file.Create("test", p9.ReadOnly, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())) - if err != nil { - t.Fatalf("WriteAt() failed: %v", err) - } - defer l.Close() - if err := checkIDs(l, os.Getuid(), os.Getgid()); err != nil { - t.Error(err) - } - }) - - t.Run("mkdir", func(t *testing.T) { - _, err := s.file.Mkdir("test-dir", 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())) - if err != nil { - t.Fatalf("WriteAt() failed: %v", err) - } - _, l, err := s.file.Walk([]string{"test-dir"}) - if err != nil { - t.Fatalf("Walk() failed: %v", err) - } - defer l.Close() - if err := checkIDs(l, os.Getuid(), os.Getgid()); err != nil { - t.Error(err) - } - }) - - t.Run("symlink", func(t *testing.T) { - if _, err := s.file.Symlink("/some/target", "symlink", p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil { - t.Fatalf("Symlink() failed: %v", err) - } - _, l, err := s.file.Walk([]string{"symlink"}) - if err != nil { - t.Fatalf("Walk() failed, err: %v", err) - } - defer l.Close() - if err := checkIDs(l, os.Getuid(), os.Getgid()); err != nil { - t.Error(err) - } - }) - - t.Run("mknod", func(t *testing.T) { - if _, err := s.file.Mknod("nod", p9.ModeRegular|0777, 0, 0, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil { - t.Fatalf("Mknod() failed: %v", err) - } - _, l, err := s.file.Walk([]string{"nod"}) - if err != nil { - t.Fatalf("Walk() failed, err: %v", err) - } - defer l.Close() - if err := checkIDs(l, os.Getuid(), os.Getgid()); err != nil { - t.Error(err) - } - }) - }) -} - -// TestReadWriteDup tests that a file opened in any mode can be dup'ed and -// reopened in any other mode. -func TestReadWriteDup(t *testing.T) { - runCustom(t, []uint32{unix.S_IFDIR}, rwConfs, func(t *testing.T, s state) { - child, err := createFile(s.file, "test") - if err != nil { - t.Fatalf("%v: createFile() failed, err: %v", s, err) - } - defer child.Close() - want := []byte("foobar") - w, err := child.WriteAt(want, 0) - if err != nil { - t.Fatalf("%v: Write() failed, err: %v", s, err) - } - if w != len(want) { - t.Fatalf("%v: Write() was partial, got: %d, expected: %d", s, w, len(want)) - } - for _, flags := range allOpenFlags { - _, l, err := s.file.Walk([]string{"test"}) - if err != nil { - t.Fatalf("%v: Walk(%s) failed, err: %v", s, "test", err) - } - defer l.Close() - if _, _, _, err := l.Open(flags); err != nil { - t.Fatalf("%v: Open(%v) failed, err: %v", s, flags, err) - } - for _, dupFlags := range allOpenFlags { - t.Logf("Original flags: %v, dup flags: %v", flags, dupFlags) - _, dup, err := l.Walk([]string{}) - if err != nil { - t.Fatalf("%v: Walk(<empty>) failed: %v", s, err) - } - defer dup.Close() - fd, _, _, err := dup.Open(dupFlags) - if err != nil { - t.Fatalf("%v: Open(%v) failed: %v", s, flags, err) - } - if fd != nil { - defer fd.Close() - } - if err := testReadWrite(dup, dupFlags, want); err != nil { - t.Fatalf("%v: testReadWrite(%v) failed: %v", s, dupFlags, err) - } - } - } - }) -} - -func TestUnopened(t *testing.T) { - runCustom(t, []uint32{unix.S_IFREG}, allConfs, func(t *testing.T, s state) { - b := []byte("foobar") - if _, err := s.file.WriteAt(b, 0); err != unix.EBADF { - t.Errorf("%v: WriteAt() should have failed, got: %v, expected: unix.EBADF", s, err) - } - if _, err := s.file.ReadAt(b, 0); err != unix.EBADF { - t.Errorf("%v: ReadAt() should have failed, got: %v, expected: unix.EBADF", s, err) - } - if _, err := s.file.Readdir(0, 100); err != unix.EBADF { - t.Errorf("%v: Readdir() should have failed, got: %v, expected: unix.EBADF", s, err) - } - if err := s.file.FSync(); err != unix.EBADF { - t.Errorf("%v: FSync() should have failed, got: %v, expected: unix.EBADF", s, err) - } - }) -} - -// TestOpenOPath is a regression test to ensure that a file that cannot be open -// for read is allowed to be open. This was happening because the control file -// was open with O_PATH, but Open() was not checking for it and allowing the -// control file to be reused. -func TestOpenOPath(t *testing.T) { - runCustom(t, []uint32{unix.S_IFREG}, rwConfs, func(t *testing.T, s state) { - // Fist remove all permissions on the file. - if err := s.file.SetAttr(p9.SetAttrMask{Permissions: true}, p9.SetAttr{Permissions: p9.FileMode(0)}); err != nil { - t.Fatalf("SetAttr(): %v", err) - } - // Then walk to the file again to open a new control file. - filename := filepath.Base(s.file.hostPath) - _, newFile, err := s.root.Walk([]string{filename}) - if err != nil { - t.Fatalf("root.Walk(%q): %v", filename, err) - } - - if newFile.(*localFile).controlReadable { - t.Fatalf("control file didn't open with O_PATH: %+v", newFile) - } - if _, _, _, err := newFile.Open(p9.ReadOnly); err != unix.EACCES { - t.Fatalf("Open() should have failed, got: %v, wanted: EACCES", err) - } - }) -} - -func SetGetAttr(l *localFile, valid p9.SetAttrMask, attr p9.SetAttr) (p9.Attr, error) { - if err := l.SetAttr(valid, attr); err != nil { - return p9.Attr{}, err - } - _, _, a, err := l.GetAttr(p9.AttrMask{}) - if err != nil { - return p9.Attr{}, err - } - return a, nil -} - -func TestSetAttrPerm(t *testing.T) { - runCustom(t, allTypes, rwConfs, func(t *testing.T, s state) { - valid := p9.SetAttrMask{Permissions: true} - attr := p9.SetAttr{Permissions: 0777} - got, err := SetGetAttr(s.file, valid, attr) - if s.fileType == unix.S_IFLNK { - if err == nil { - t.Fatalf("%v: SetGetAttr(valid, %v) should have failed", s, attr.Permissions) - } - } else { - if err != nil { - t.Fatalf("%v: SetGetAttr(valid, %v) failed, err: %v", s, attr.Permissions, err) - } - if got.Mode.Permissions() != attr.Permissions { - t.Errorf("%v: wrong permission, got: %v, expected: %v", s, got.Mode.Permissions(), attr.Permissions) - } - } - }) -} - -func TestSetAttrSize(t *testing.T) { - runCustom(t, allTypes, rwConfs, func(t *testing.T, s state) { - for _, size := range []uint64{1024, 0, 1024 * 1024} { - valid := p9.SetAttrMask{Size: true} - attr := p9.SetAttr{Size: size} - got, err := SetGetAttr(s.file, valid, attr) - if s.fileType == unix.S_IFLNK || s.fileType == unix.S_IFDIR { - if err == nil { - t.Fatalf("%v: SetGetAttr(valid, %v) should have failed", s, attr.Permissions) - } - // Run for one size only, they will all fail the same way. - return - } - if err != nil { - t.Fatalf("%v: SetGetAttr(valid, %v) failed, err: %v", s, attr.Size, err) - } - if got.Size != size { - t.Errorf("%v: wrong size, got: %v, expected: %v", s, got.Size, size) - } - } - }) -} - -func TestSetAttrTime(t *testing.T) { - runCustom(t, allTypes, rwConfs, func(t *testing.T, s state) { - valid := p9.SetAttrMask{ATime: true, ATimeNotSystemTime: true} - attr := p9.SetAttr{ATimeSeconds: 123, ATimeNanoSeconds: 456} - got, err := SetGetAttr(s.file, valid, attr) - if err != nil { - t.Fatalf("%v: SetGetAttr(valid, %v:%v) failed, err: %v", s, attr.ATimeSeconds, attr.ATimeNanoSeconds, err) - } - if got.ATimeSeconds != 123 { - t.Errorf("%v: wrong ATimeSeconds, got: %v, expected: %v", s, got.ATimeSeconds, 123) - } - if got.ATimeNanoSeconds != 456 { - t.Errorf("%v: wrong ATimeNanoSeconds, got: %v, expected: %v", s, got.ATimeNanoSeconds, 456) - } - - valid = p9.SetAttrMask{MTime: true, MTimeNotSystemTime: true} - attr = p9.SetAttr{MTimeSeconds: 789, MTimeNanoSeconds: 012} - got, err = SetGetAttr(s.file, valid, attr) - if err != nil { - t.Fatalf("%v: SetGetAttr(valid, %v:%v) failed, err: %v", s, attr.MTimeSeconds, attr.MTimeNanoSeconds, err) - } - if got.MTimeSeconds != 789 { - t.Errorf("%v: wrong MTimeSeconds, got: %v, expected: %v", s, got.MTimeSeconds, 789) - } - if got.MTimeNanoSeconds != 012 { - t.Errorf("%v: wrong MTimeNanoSeconds, got: %v, expected: %v", s, got.MTimeNanoSeconds, 012) - } - }) -} - -func TestSetAttrOwner(t *testing.T) { - if !specutils.HasCapabilities(capability.CAP_CHOWN) { - t.Skipf("SetAttr(owner) test requires CAP_CHOWN, running as %d", os.Getuid()) - } - - runCustom(t, allTypes, rwConfs, func(t *testing.T, s state) { - newUID := os.Getuid() + 1 - valid := p9.SetAttrMask{UID: true} - attr := p9.SetAttr{UID: p9.UID(newUID)} - got, err := SetGetAttr(s.file, valid, attr) - if err != nil { - t.Fatalf("%v: SetGetAttr(valid, %v) failed, err: %v", s, attr.UID, err) - } - if got.UID != p9.UID(newUID) { - t.Errorf("%v: wrong uid, got: %v, expected: %v", s, got.UID, newUID) - } - }) -} - -func TestLink(t *testing.T) { - if !specutils.HasCapabilities(capability.CAP_DAC_READ_SEARCH) { - t.Skipf("Link test requires CAP_DAC_READ_SEARCH, running as %d", os.Getuid()) - } - runCustom(t, allTypes, rwConfs, func(t *testing.T, s state) { - const dirName = "linkdir" - const linkFile = "link" - if _, err := s.root.Mkdir(dirName, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil { - t.Fatalf("%v: MkDir(%s) failed, err: %v", s, dirName, err) - } - _, dir, err := s.root.Walk([]string{dirName}) - if err != nil { - t.Fatalf("%v: Walk({%s}) failed, err: %v", s, dirName, err) - } - - err = dir.Link(s.file, linkFile) - if s.fileType == unix.S_IFDIR { - if err != unix.EPERM { - t.Errorf("%v: Link(target, %s) should have failed, got: %v, expected: unix.EPERM", s, linkFile, err) - } - return - } - if err != nil { - t.Errorf("%v: Link(target, %s) failed, err: %v", s, linkFile, err) - } - }) -} - -func TestROMountChecks(t *testing.T) { - const want = unix.EROFS - uid := p9.UID(os.Getuid()) - gid := p9.GID(os.Getgid()) - - runCustom(t, allTypes, roConfs, func(t *testing.T, s state) { - if s.fileType != unix.S_IFLNK { - if _, _, _, err := s.file.Open(p9.WriteOnly); err != want { - t.Errorf("Open() should have failed, got: %v, expected: %v", err, want) - } - if _, _, _, err := s.file.Open(p9.ReadWrite); err != want { - t.Errorf("Open() should have failed, got: %v, expected: %v", err, want) - } - if _, _, _, err := s.file.Open(p9.ReadOnly | p9.OpenTruncate); err != want { - t.Errorf("Open() should have failed, got: %v, expected: %v", err, want) - } - f, _, _, err := s.file.Open(p9.ReadOnly) - if err != nil { - t.Errorf("Open() failed: %v", err) - } - if f != nil { - _ = f.Close() - } - } - - if _, _, _, _, err := s.file.Create("some_file", p9.ReadWrite, 0777, uid, gid); err != want { - t.Errorf("Create() should have failed, got: %v, expected: %v", err, want) - } - if _, err := s.file.Mkdir("some_dir", 0777, uid, gid); err != want { - t.Errorf("MkDir() should have failed, got: %v, expected: %v", err, want) - } - if err := s.file.RenameAt("some_file", s.file, "other_file"); err != want { - t.Errorf("Rename() should have failed, got: %v, expected: %v", err, want) - } - if _, err := s.file.Symlink("some_place", "some_symlink", uid, gid); err != want { - t.Errorf("Symlink() should have failed, got: %v, expected: %v", err, want) - } - if err := s.file.UnlinkAt("some_file", 0); err != want { - t.Errorf("UnlinkAt() should have failed, got: %v, expected: %v", err, want) - } - if err := s.file.Link(s.file, "some_link"); err != want { - t.Errorf("Link() should have failed, got: %v, expected: %v", err, want) - } - if _, err := s.file.Mknod("some-nod", 0777, 1, 2, uid, gid); err != want { - t.Errorf("Mknod() should have failed, got: %v, expected: %v", err, want) - } - - valid := p9.SetAttrMask{Size: true} - attr := p9.SetAttr{Size: 0} - if err := s.file.SetAttr(valid, attr); err != want { - t.Errorf("SetAttr() should have failed, got: %v, expected: %v", err, want) - } - }) -} - -func TestWalkNotFound(t *testing.T) { - runCustom(t, []uint32{unix.S_IFDIR}, allConfs, func(t *testing.T, s state) { - if _, _, err := s.file.Walk([]string{"nobody-here"}); err != unix.ENOENT { - t.Errorf("Walk(%q) should have failed, got: %v, expected: unix.ENOENT", "nobody-here", err) - } - if _, _, err := s.file.Walk([]string{"nobody", "here"}); err != unix.ENOENT { - t.Errorf("Walk(%q) should have failed, got: %v, expected: unix.ENOENT", "nobody/here", err) - } - if !s.conf.ROMount { - if _, err := s.file.Mkdir("dir", 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil { - t.Fatalf("MkDir(dir) failed, err: %v", err) - } - if _, _, err := s.file.Walk([]string{"dir", "nobody-here"}); err != unix.ENOENT { - t.Errorf("Walk(%q) should have failed, got: %v, expected: unix.ENOENT", "dir/nobody-here", err) - } - } - }) -} - -func TestWalkPanic(t *testing.T) { - runCustom(t, []uint32{unix.S_IFDIR}, allConfs, func(t *testing.T, s state) { - for _, name := range []string{".", ".."} { - assertPanic(t, func() { - s.file.Walk([]string{name}) - }) - } - }) -} - -func TestWalkDup(t *testing.T) { - runAll(t, func(t *testing.T, s state) { - _, dup, err := s.file.Walk([]string{}) - if err != nil { - t.Fatalf("%v: Walk(nil) failed, err: %v", s, err) - } - // Check that 'dup' is usable. - if _, _, _, err := dup.GetAttr(p9.AttrMask{}); err != nil { - t.Errorf("%v: GetAttr() failed, err: %v", s, err) - } - }) -} - -func TestWalkMultiple(t *testing.T) { - runCustom(t, []uint32{unix.S_IFDIR}, rwConfs, func(t *testing.T, s state) { - var names []string - var parent p9.File = s.file - for i := 0; i < 5; i++ { - name := fmt.Sprintf("dir%d", i) - names = append(names, name) - - if _, err := parent.Mkdir(name, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil { - t.Fatalf("MkDir(%q) failed, err: %v", name, err) - } - - var err error - _, parent, err = s.file.Walk(names) - if err != nil { - t.Errorf("Walk(%q): %v", name, err) - } - } - }) -} - -func TestReaddir(t *testing.T) { - runCustom(t, []uint32{unix.S_IFDIR}, rwConfs, func(t *testing.T, s state) { - name := "dir" - if _, err := s.file.Mkdir(name, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil { - t.Fatalf("%v: MkDir(%s) failed, err: %v", s, name, err) - } - name = "symlink" - if _, err := s.file.Symlink("/some/target", name, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil { - t.Fatalf("%v: Symlink(%q) failed, err: %v", s, name, err) - } - name = "file" - _, f, _, _, err := s.file.Create(name, p9.ReadWrite, 0555, p9.UID(os.Getuid()), p9.GID(os.Getgid())) - if err != nil { - t.Fatalf("%v: createFile(root, %q) failed, err: %v", s, name, err) - } - f.Close() - - if _, _, _, err := s.file.Open(p9.ReadOnly); err != nil { - t.Fatalf("%v: Open(ReadOnly) failed, err: %v", s, err) - } - - dirents, err := s.file.Readdir(0, 10) - if err != nil { - t.Fatalf("%v: Readdir(0, 10) failed, err: %v", s, err) - } - if len(dirents) != 3 { - t.Fatalf("%v: Readdir(0, 10) wrong number of items, got: %v, expected: 3", s, len(dirents)) - } - var dir, symlink, file bool - for _, d := range dirents { - switch d.Name { - case "dir": - if d.Type != p9.TypeDir { - t.Errorf("%v: dirent.Type got: %v, expected: %v", s, d.Type, p9.TypeDir) - } - dir = true - case "symlink": - if d.Type != p9.TypeSymlink { - t.Errorf("%v: dirent.Type got: %v, expected: %v", s, d.Type, p9.TypeSymlink) - } - symlink = true - case "file": - if d.Type != p9.TypeRegular { - t.Errorf("%v: dirent.Type got: %v, expected: %v", s, d.Type, p9.TypeRegular) - } - file = true - default: - t.Errorf("%v: dirent.Name got: %v", s, d.Name) - } - - _, f, err := s.file.Walk([]string{d.Name}) - if err != nil { - t.Fatalf("%v: Walk({%s}) failed, err: %v", s, d.Name, err) - } - _, _, a, err := f.GetAttr(p9.AttrMask{}) - if err != nil { - t.Fatalf("%v: GetAttr() failed, err: %v", s, err) - } - if d.Type != a.Mode.QIDType() { - t.Errorf("%v: dirent.Type different than GetAttr().Mode.QIDType(), got: %v, expected: %v", s, d.Type, a.Mode.QIDType()) - } - } - if !dir || !symlink || !file { - t.Errorf("%v: Readdir(0, 10) wrong files returned, dir: %v, symlink: %v, file: %v", s, dir, symlink, file) - } - }) -} - -// Test that attach point can be written to when it points to a file, e.g. -// /etc/hosts. -func TestAttachFile(t *testing.T) { - conf := Config{ROMount: false} - dir, err := ioutil.TempDir("", "root-") - if err != nil { - t.Fatalf("ioutil.TempDir() failed, err: %v", err) - } - defer os.RemoveAll(dir) - - path := path.Join(dir, "test") - if _, err := os.Create(path); err != nil { - t.Fatalf("os.Create(%q) failed, err: %v", path, err) - } - - a, err := NewAttachPoint(path, conf) - if err != nil { - t.Fatalf("NewAttachPoint failed: %v", err) - } - root, err := a.Attach() - if err != nil { - t.Fatalf("Attach failed, err: %v", err) - } - - if _, _, _, err := root.Open(p9.ReadWrite); err != nil { - t.Fatalf("Open(ReadWrite) failed, err: %v", err) - } - defer root.Close() - - b := []byte("foobar") - w, err := root.WriteAt(b, 0) - if err != nil { - t.Fatalf("Write() failed, err: %v", err) - } - if w != len(b) { - t.Fatalf("Write() was partial, got: %d, expected: %d", w, len(b)) - } - rBuf := make([]byte, len(b)) - r, err := root.ReadAt(rBuf, 0) - if err != nil { - t.Fatalf("ReadAt() failed, err: %v", err) - } - if r != len(rBuf) { - t.Fatalf("ReadAt() was partial, got: %d, expected: %d", r, len(rBuf)) - } - if string(rBuf) != "foobar" { - t.Fatalf("ReadAt() wrong data, got: %s, expected: %s", string(rBuf), "foobar") - } -} - -func TestAttachInvalidType(t *testing.T) { - dir, err := ioutil.TempDir("", "attach-") - if err != nil { - t.Fatalf("ioutil.TempDir() failed, err: %v", err) - } - defer os.RemoveAll(dir) - - fifo := filepath.Join(dir, "fifo") - if err := unix.Mkfifo(fifo, 0755); err != nil { - t.Fatalf("Mkfifo(%q): %v", fifo, err) - } - - dirFile, err := os.Open(dir) - if err != nil { - t.Fatalf("Open(%s): %v", dir, err) - } - defer dirFile.Close() - - // Bind a socket via /proc to be sure that a length of a socket path - // is less than UNIX_PATH_MAX. - socket := filepath.Join(fmt.Sprintf("/proc/self/fd/%d", dirFile.Fd()), "socket") - l, err := net.Listen("unix", socket) - if err != nil { - t.Fatalf("net.Listen(unix, %q): %v", socket, err) - } - defer l.Close() - - for _, tc := range []struct { - name string - path string - }{ - {name: "fifo", path: fifo}, - {name: "socket", path: socket}, - } { - t.Run(tc.name, func(t *testing.T) { - conf := Config{ROMount: false} - a, err := NewAttachPoint(tc.path, conf) - if err != nil { - t.Fatalf("NewAttachPoint failed: %v", err) - } - f, err := a.Attach() - if f != nil || err == nil { - t.Fatalf("Attach should have failed, got (%v, %v)", f, err) - } - }) - } -} - -func TestDoubleAttachError(t *testing.T) { - conf := Config{ROMount: false} - root, err := ioutil.TempDir("", "root-") - if err != nil { - t.Fatalf("ioutil.TempDir() failed, err: %v", err) - } - defer os.RemoveAll(root) - a, err := NewAttachPoint(root, conf) - if err != nil { - t.Fatalf("NewAttachPoint failed: %v", err) - } - - if _, err := a.Attach(); err != nil { - t.Fatalf("Attach failed: %v", err) - } - if _, err := a.Attach(); err == nil { - t.Fatalf("Attach should have failed, got %v want non-nil", err) - } -} - -func TestTruncate(t *testing.T) { - runCustom(t, []uint32{unix.S_IFDIR}, rwConfs, func(t *testing.T, s state) { - child, err := createFile(s.file, "test") - if err != nil { - t.Fatalf("createFile() failed: %v", err) - } - defer child.Close() - want := []byte("foobar") - w, err := child.WriteAt(want, 0) - if err != nil { - t.Fatalf("Write() failed: %v", err) - } - if w != len(want) { - t.Fatalf("Write() was partial, got: %d, expected: %d", w, len(want)) - } - - _, l, err := s.file.Walk([]string{"test"}) - if err != nil { - t.Fatalf("Walk(%s) failed: %v", "test", err) - } - if _, _, _, err := l.Open(p9.ReadOnly | p9.OpenTruncate); err != nil { - t.Fatalf("Open() failed: %v", err) - } - _, mask, attr, err := l.GetAttr(p9.AttrMask{Size: true}) - if err != nil { - t.Fatalf("GetAttr() failed: %v", err) - } - if !mask.Size { - t.Fatalf("GetAttr() didn't return size: %+v", mask) - } - if attr.Size != 0 { - t.Fatalf("truncate didn't work, want: 0, got: %d", attr.Size) - } - }) -} - -func TestMknod(t *testing.T) { - runCustom(t, []uint32{unix.S_IFDIR}, rwConfs, func(t *testing.T, s state) { - _, err := s.file.Mknod("test", p9.ModeRegular|0777, 1, 2, p9.UID(os.Getuid()), p9.GID(os.Getgid())) - if err != nil { - t.Fatalf("Mknod() failed: %v", err) - } - - _, f, err := s.file.Walk([]string{"test"}) - if err != nil { - t.Fatalf("Walk() failed: %v", err) - } - fd, _, _, err := f.Open(p9.ReadWrite) - if err != nil { - t.Fatalf("Open() failed: %v", err) - } - if fd != nil { - defer fd.Close() - } - if err := testReadWrite(f, p9.ReadWrite, nil); err != nil { - t.Fatalf("testReadWrite() failed: %v", err) - } - }) -} - -func BenchmarkWalkOne(b *testing.B) { - path, name, err := setup(unix.S_IFDIR) - if err != nil { - b.Fatalf("%v", err) - } - defer os.RemoveAll(path) - - a, err := NewAttachPoint(path, Config{}) - if err != nil { - b.Fatalf("NewAttachPoint failed: %v", err) - } - root, err := a.Attach() - if err != nil { - b.Fatalf("Attach failed, err: %v", err) - } - defer root.Close() - - names := []string{name} - files := make([]p9.File, 0, 1000) - - b.ResetTimer() - for i := 0; i < b.N; i++ { - _, file, err := root.Walk(names) - if err != nil { - b.Fatalf("Walk(%q): %v", name, err) - } - files = append(files, file) - - // Avoid running out of FDs. - if len(files) == cap(files) { - b.StopTimer() - for _, file := range files { - file.Close() - } - files = files[:0] - b.StartTimer() - } - } - - b.StopTimer() - for _, file := range files { - file.Close() - } -} - -func BenchmarkCreate(b *testing.B) { - path, _, err := setup(unix.S_IFDIR) - if err != nil { - b.Fatalf("%v", err) - } - defer os.RemoveAll(path) - - a, err := NewAttachPoint(path, Config{}) - if err != nil { - b.Fatalf("NewAttachPoint failed: %v", err) - } - root, err := a.Attach() - if err != nil { - b.Fatalf("Attach failed, err: %v", err) - } - defer root.Close() - - files := make([]p9.File, 0, 500) - fds := make([]*fd.FD, 0, 500) - uid := p9.UID(os.Getuid()) - gid := p9.GID(os.Getgid()) - - b.ResetTimer() - for i := 0; i < b.N; i++ { - name := fmt.Sprintf("same-%d", i) - fd, file, _, _, err := root.Create(name, p9.ReadOnly, 0777, uid, gid) - if err != nil { - b.Fatalf("Create(%q): %v", name, err) - } - files = append(files, file) - if fd != nil { - fds = append(fds, fd) - } - - // Avoid running out of FDs. - if len(files) == cap(files) { - b.StopTimer() - for _, file := range files { - file.Close() - } - files = files[:0] - for _, fd := range fds { - fd.Close() - } - fds = fds[:0] - b.StartTimer() - } - } - - b.StopTimer() - for _, file := range files { - file.Close() - } - for _, fd := range fds { - fd.Close() - } -} - -func BenchmarkCreateDiffOwner(b *testing.B) { - if !specutils.HasCapabilities(capability.CAP_CHOWN) { - b.Skipf("Test requires CAP_CHOWN") - } - - path, _, err := setup(unix.S_IFDIR) - if err != nil { - b.Fatalf("%v", err) - } - defer os.RemoveAll(path) - - a, err := NewAttachPoint(path, Config{}) - if err != nil { - b.Fatalf("NewAttachPoint failed: %v", err) - } - root, err := a.Attach() - if err != nil { - b.Fatalf("Attach failed, err: %v", err) - } - defer root.Close() - - files := make([]p9.File, 0, 500) - fds := make([]*fd.FD, 0, 500) - gid := p9.GID(os.Getgid()) - - b.ResetTimer() - for i := 0; i < b.N; i++ { - name := fmt.Sprintf("diff-%d", i) - fd, file, _, _, err := root.Create(name, p9.ReadOnly, 0777, nobody, gid) - if err != nil { - b.Fatalf("Create(%q): %v", name, err) - } - files = append(files, file) - if fd != nil { - fds = append(fds, fd) - } - - // Avoid running out of FDs. - if len(files) == cap(files) { - b.StopTimer() - for _, file := range files { - file.Close() - } - files = files[:0] - for _, fd := range fds { - fd.Close() - } - fds = fds[:0] - b.StartTimer() - } - } - - b.StopTimer() - for _, file := range files { - file.Close() - } - for _, fd := range fds { - fd.Close() - } -} |