693 lines
21 KiB
Go
693 lines
21 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package fsgofer
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import (
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"path"
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"path/filepath"
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"syscall"
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"testing"
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"gvisor.dev/gvisor/pkg/log"
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"gvisor.dev/gvisor/pkg/p9"
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)
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func init() {
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log.SetLevel(log.Debug)
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allConfs = append(allConfs, rwConfs...)
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allConfs = append(allConfs, roConfs...)
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if err := OpenProcSelfFD(); err != nil {
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panic(err)
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}
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}
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func assertPanic(t *testing.T, f func()) {
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defer func() {
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if r := recover(); r == nil {
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t.Errorf("function did not panic")
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}
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}()
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f()
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}
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func testReadWrite(f p9.File, flags p9.OpenFlags, content []byte) error {
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want := make([]byte, len(content))
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copy(want, content)
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b := []byte("test-1-2-3")
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w, err := f.WriteAt(b, uint64(len(content)))
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if flags == p9.WriteOnly || flags == p9.ReadWrite {
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if err != nil {
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return fmt.Errorf("WriteAt(): %v", err)
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}
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if w != len(b) {
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return fmt.Errorf("WriteAt() was partial, got: %d, want: %d", w, len(b))
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}
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want = append(want, b...)
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} else {
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if e, ok := err.(syscall.Errno); !ok || e != syscall.EBADF {
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return fmt.Errorf("WriteAt() should have failed, got: %d, want: EBADFD", err)
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}
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}
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rBuf := make([]byte, len(want))
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r, err := f.ReadAt(rBuf, 0)
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if flags == p9.ReadOnly || flags == p9.ReadWrite {
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if err != nil {
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return fmt.Errorf("ReadAt(): %v", err)
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}
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if r != len(rBuf) {
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return fmt.Errorf("ReadAt() was partial, got: %d, want: %d", r, len(rBuf))
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}
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if string(rBuf) != string(want) {
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return fmt.Errorf("ReadAt() wrong data, got: %s, want: %s", string(rBuf), want)
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}
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} else {
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if e, ok := err.(syscall.Errno); !ok || e != syscall.EBADF {
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return fmt.Errorf("ReadAt() should have failed, got: %d, want: EBADFD", err)
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}
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}
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return nil
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}
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var allOpenFlags = []p9.OpenFlags{p9.ReadOnly, p9.WriteOnly, p9.ReadWrite}
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var (
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allTypes = []fileType{regular, directory, symlink}
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// allConfs is set in init() above.
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allConfs []Config
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rwConfs = []Config{{ROMount: false}}
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roConfs = []Config{{ROMount: true}}
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)
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type state struct {
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root *localFile
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file *localFile
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conf Config
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ft fileType
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}
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func (s state) String() string {
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return fmt.Sprintf("type(%v)", s.ft)
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}
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func runAll(t *testing.T, test func(*testing.T, state)) {
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runCustom(t, allTypes, allConfs, test)
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}
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func runCustom(t *testing.T, types []fileType, confs []Config, test func(*testing.T, state)) {
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for _, c := range confs {
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t.Logf("Config: %+v", c)
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for _, ft := range types {
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t.Logf("File type: %v", ft)
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path, name, err := setup(ft)
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if err != nil {
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t.Fatalf("%v", err)
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}
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defer os.RemoveAll(path)
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a, err := NewAttachPoint(path, c)
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if err != nil {
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t.Fatalf("NewAttachPoint failed: %v", err)
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}
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root, err := a.Attach()
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if err != nil {
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t.Fatalf("Attach failed, err: %v", err)
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}
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_, file, err := root.Walk([]string{name})
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if err != nil {
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root.Close()
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t.Fatalf("root.Walk({%q}) failed, err: %v", "symlink", err)
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}
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st := state{root: root.(*localFile), file: file.(*localFile), conf: c, ft: ft}
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test(t, st)
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file.Close()
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root.Close()
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}
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}
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}
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func setup(ft fileType) (string, string, error) {
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path, err := ioutil.TempDir("", "root-")
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if err != nil {
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return "", "", fmt.Errorf("ioutil.TempDir() failed, err: %v", err)
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}
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// First attach with writable configuration to setup tree.
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a, err := NewAttachPoint(path, Config{})
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if err != nil {
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return "", "", err
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}
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root, err := a.Attach()
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if err != nil {
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return "", "", fmt.Errorf("Attach failed, err: %v", err)
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}
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defer root.Close()
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var name string
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switch ft {
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case regular:
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name = "file"
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_, f, _, _, err := root.Create(name, p9.ReadWrite, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid()))
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if err != nil {
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return "", "", fmt.Errorf("createFile(root, %q) failed, err: %v", "test", err)
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}
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defer f.Close()
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case directory:
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name = "dir"
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if _, err := root.Mkdir(name, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil {
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return "", "", fmt.Errorf("root.MkDir(%q) failed, err: %v", name, err)
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}
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case symlink:
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name = "symlink"
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if _, err := root.Symlink("/some/target", name, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil {
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return "", "", fmt.Errorf("root.Symlink(%q) failed, err: %v", name, err)
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}
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default:
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panic(fmt.Sprintf("unknown file type %v", ft))
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}
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return path, name, nil
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}
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func createFile(dir *localFile, name string) (*localFile, error) {
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_, f, _, _, err := dir.Create(name, p9.ReadWrite, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid()))
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if err != nil {
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return nil, err
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}
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return f.(*localFile), nil
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}
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func TestReadWrite(t *testing.T) {
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runCustom(t, []fileType{directory}, rwConfs, func(t *testing.T, s state) {
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child, err := createFile(s.file, "test")
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if err != nil {
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t.Fatalf("%v: createFile() failed, err: %v", s, err)
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}
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defer child.Close()
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want := []byte("foobar")
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w, err := child.WriteAt(want, 0)
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if err != nil {
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t.Fatalf("%v: Write() failed, err: %v", s, err)
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}
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if w != len(want) {
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t.Fatalf("%v: Write() was partial, got: %d, expected: %d", s, w, len(want))
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}
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for _, flags := range allOpenFlags {
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_, l, err := s.file.Walk([]string{"test"})
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if err != nil {
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t.Fatalf("%v: Walk(%s) failed, err: %v", s, "test", err)
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}
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if _, _, _, err := l.Open(flags); err != nil {
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t.Fatalf("%v: Open(%v) failed, err: %v", s, flags, err)
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}
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if err := testReadWrite(l, flags, want); err != nil {
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t.Fatalf("%v: testReadWrite(%v) failed: %v", s, flags, err)
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}
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}
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})
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}
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func TestCreate(t *testing.T) {
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runCustom(t, []fileType{directory}, rwConfs, func(t *testing.T, s state) {
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for i, flags := range allOpenFlags {
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_, l, _, _, err := s.file.Create(fmt.Sprintf("test-%d", i), flags, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid()))
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if err != nil {
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t.Fatalf("%v, %v: WriteAt() failed, err: %v", s, flags, err)
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}
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if err := testReadWrite(l, flags, []byte{}); err != nil {
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t.Fatalf("%v: testReadWrite(%v) failed: %v", s, flags, err)
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}
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}
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})
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}
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// TestReadWriteDup tests that a file opened in any mode can be dup'ed and
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// reopened in any other mode.
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func TestReadWriteDup(t *testing.T) {
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runCustom(t, []fileType{directory}, rwConfs, func(t *testing.T, s state) {
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child, err := createFile(s.file, "test")
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if err != nil {
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t.Fatalf("%v: createFile() failed, err: %v", s, err)
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}
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defer child.Close()
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want := []byte("foobar")
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w, err := child.WriteAt(want, 0)
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if err != nil {
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t.Fatalf("%v: Write() failed, err: %v", s, err)
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}
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if w != len(want) {
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t.Fatalf("%v: Write() was partial, got: %d, expected: %d", s, w, len(want))
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}
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for _, flags := range allOpenFlags {
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_, l, err := s.file.Walk([]string{"test"})
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if err != nil {
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t.Fatalf("%v: Walk(%s) failed, err: %v", s, "test", err)
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}
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defer l.Close()
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if _, _, _, err := l.Open(flags); err != nil {
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t.Fatalf("%v: Open(%v) failed, err: %v", s, flags, err)
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}
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for _, dupFlags := range allOpenFlags {
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t.Logf("Original flags: %v, dup flags: %v", flags, dupFlags)
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_, dup, err := l.Walk([]string{})
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if err != nil {
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t.Fatalf("%v: Walk(<empty>) failed: %v", s, err)
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}
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defer dup.Close()
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if _, _, _, err := dup.Open(dupFlags); err != nil {
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t.Fatalf("%v: Open(%v) failed: %v", s, flags, err)
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}
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if err := testReadWrite(dup, dupFlags, want); err != nil {
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t.Fatalf("%v: testReadWrite(%v) failed: %v", s, dupFlags, err)
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}
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}
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}
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})
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}
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func TestUnopened(t *testing.T) {
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runCustom(t, []fileType{regular}, allConfs, func(t *testing.T, s state) {
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b := []byte("foobar")
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if _, err := s.file.WriteAt(b, 0); err != syscall.EBADF {
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t.Errorf("%v: WriteAt() should have failed, got: %v, expected: syscall.EBADF", s, err)
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}
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if _, err := s.file.ReadAt(b, 0); err != syscall.EBADF {
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t.Errorf("%v: ReadAt() should have failed, got: %v, expected: syscall.EBADF", s, err)
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}
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if _, err := s.file.Readdir(0, 100); err != syscall.EBADF {
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t.Errorf("%v: Readdir() should have failed, got: %v, expected: syscall.EBADF", s, err)
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}
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if err := s.file.FSync(); err != syscall.EBADF {
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t.Errorf("%v: FSync() should have failed, got: %v, expected: syscall.EBADF", s, err)
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}
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})
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}
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func SetGetAttr(l *localFile, valid p9.SetAttrMask, attr p9.SetAttr) (p9.Attr, error) {
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if err := l.SetAttr(valid, attr); err != nil {
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return p9.Attr{}, err
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}
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_, _, a, err := l.GetAttr(p9.AttrMask{})
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if err != nil {
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return p9.Attr{}, err
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}
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return a, nil
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}
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func TestSetAttrPerm(t *testing.T) {
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runCustom(t, allTypes, rwConfs, func(t *testing.T, s state) {
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valid := p9.SetAttrMask{Permissions: true}
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attr := p9.SetAttr{Permissions: 0777}
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got, err := SetGetAttr(s.file, valid, attr)
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if s.ft == symlink {
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if err == nil {
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t.Fatalf("%v: SetGetAttr(valid, %v) should have failed", s, attr.Permissions)
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}
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} else {
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if err != nil {
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t.Fatalf("%v: SetGetAttr(valid, %v) failed, err: %v", s, attr.Permissions, err)
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}
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if got.Mode.Permissions() != attr.Permissions {
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t.Errorf("%v: wrong permission, got: %v, expected: %v", s, got.Mode.Permissions(), attr.Permissions)
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}
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}
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})
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}
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func TestSetAttrSize(t *testing.T) {
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runCustom(t, allTypes, rwConfs, func(t *testing.T, s state) {
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for _, size := range []uint64{1024, 0, 1024 * 1024} {
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valid := p9.SetAttrMask{Size: true}
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attr := p9.SetAttr{Size: size}
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got, err := SetGetAttr(s.file, valid, attr)
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if s.ft == symlink || s.ft == directory {
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if err == nil {
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t.Fatalf("%v: SetGetAttr(valid, %v) should have failed", s, attr.Permissions)
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}
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// Run for one size only, they will all fail the same way.
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return
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}
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if err != nil {
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t.Fatalf("%v: SetGetAttr(valid, %v) failed, err: %v", s, attr.Size, err)
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}
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if got.Size != size {
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t.Errorf("%v: wrong size, got: %v, expected: %v", s, got.Size, size)
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}
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}
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})
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}
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func TestSetAttrTime(t *testing.T) {
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runCustom(t, allTypes, rwConfs, func(t *testing.T, s state) {
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valid := p9.SetAttrMask{ATime: true, ATimeNotSystemTime: true}
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attr := p9.SetAttr{ATimeSeconds: 123, ATimeNanoSeconds: 456}
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got, err := SetGetAttr(s.file, valid, attr)
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if err != nil {
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t.Fatalf("%v: SetGetAttr(valid, %v:%v) failed, err: %v", s, attr.ATimeSeconds, attr.ATimeNanoSeconds, err)
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}
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if got.ATimeSeconds != 123 {
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t.Errorf("%v: wrong ATimeSeconds, got: %v, expected: %v", s, got.ATimeSeconds, 123)
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}
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if got.ATimeNanoSeconds != 456 {
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t.Errorf("%v: wrong ATimeNanoSeconds, got: %v, expected: %v", s, got.ATimeNanoSeconds, 456)
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}
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valid = p9.SetAttrMask{MTime: true, MTimeNotSystemTime: true}
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attr = p9.SetAttr{MTimeSeconds: 789, MTimeNanoSeconds: 012}
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got, err = SetGetAttr(s.file, valid, attr)
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if err != nil {
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t.Fatalf("%v: SetGetAttr(valid, %v:%v) failed, err: %v", s, attr.MTimeSeconds, attr.MTimeNanoSeconds, err)
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}
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if got.MTimeSeconds != 789 {
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t.Errorf("%v: wrong MTimeSeconds, got: %v, expected: %v", s, got.MTimeSeconds, 789)
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}
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if got.MTimeNanoSeconds != 012 {
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t.Errorf("%v: wrong MTimeNanoSeconds, got: %v, expected: %v", s, got.MTimeNanoSeconds, 012)
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}
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})
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}
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func TestSetAttrOwner(t *testing.T) {
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if os.Getuid() != 0 {
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t.Skipf("SetAttr(owner) test requires CAP_CHOWN, running as %d", os.Getuid())
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}
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runCustom(t, allTypes, rwConfs, func(t *testing.T, s state) {
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newUID := os.Getuid() + 1
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valid := p9.SetAttrMask{UID: true}
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attr := p9.SetAttr{UID: p9.UID(newUID)}
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got, err := SetGetAttr(s.file, valid, attr)
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if err != nil {
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t.Fatalf("%v: SetGetAttr(valid, %v) failed, err: %v", s, attr.UID, err)
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}
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if got.UID != p9.UID(newUID) {
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t.Errorf("%v: wrong uid, got: %v, expected: %v", s, got.UID, newUID)
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}
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})
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}
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func TestLink(t *testing.T) {
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if os.Getuid() != 0 {
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t.Skipf("Link test requires CAP_DAC_READ_SEARCH, running as %d", os.Getuid())
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}
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runCustom(t, allTypes, rwConfs, func(t *testing.T, s state) {
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const dirName = "linkdir"
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const linkFile = "link"
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if _, err := s.root.Mkdir(dirName, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != nil {
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t.Fatalf("%v: MkDir(%s) failed, err: %v", s, dirName, err)
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}
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_, dir, err := s.root.Walk([]string{dirName})
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if err != nil {
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t.Fatalf("%v: Walk({%s}) failed, err: %v", s, dirName, err)
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}
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err = dir.Link(s.file, linkFile)
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if s.ft == directory {
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if err != syscall.EPERM {
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t.Errorf("%v: Link(target, %s) should have failed, got: %v, expected: syscall.EPERM", s, linkFile, err)
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}
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return
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}
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if err != nil {
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t.Errorf("%v: Link(target, %s) failed, err: %v", s, linkFile, err)
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}
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})
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}
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func TestROMountChecks(t *testing.T) {
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runCustom(t, allTypes, roConfs, func(t *testing.T, s state) {
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if _, _, _, _, err := s.file.Create("some_file", p9.ReadWrite, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != syscall.EBADF {
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t.Errorf("%v: Create() should have failed, got: %v, expected: syscall.EBADF", s, err)
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}
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if _, err := s.file.Mkdir("some_dir", 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != syscall.EBADF {
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t.Errorf("%v: MkDir() should have failed, got: %v, expected: syscall.EBADF", s, err)
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}
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if err := s.file.RenameAt("some_file", s.file, "other_file"); err != syscall.EBADF {
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t.Errorf("%v: Rename() should have failed, got: %v, expected: syscall.EBADF", s, err)
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}
|
|
if _, err := s.file.Symlink("some_place", "some_symlink", p9.UID(os.Getuid()), p9.GID(os.Getgid())); err != syscall.EBADF {
|
|
t.Errorf("%v: Symlink() should have failed, got: %v, expected: syscall.EBADF", s, err)
|
|
}
|
|
if err := s.file.UnlinkAt("some_file", 0); err != syscall.EBADF {
|
|
t.Errorf("%v: UnlinkAt() should have failed, got: %v, expected: syscall.EBADF", s, err)
|
|
}
|
|
if err := s.file.Link(s.file, "some_link"); err != syscall.EBADF {
|
|
t.Errorf("%v: Link() should have failed, got: %v, expected: syscall.EBADF", s, err)
|
|
}
|
|
|
|
valid := p9.SetAttrMask{Size: true}
|
|
attr := p9.SetAttr{Size: 0}
|
|
if err := s.file.SetAttr(valid, attr); err != syscall.EBADF {
|
|
t.Errorf("%v: SetAttr() should have failed, got: %v, expected: syscall.EBADF", s, err)
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestROMountPanics(t *testing.T) {
|
|
conf := Config{ROMount: true, PanicOnWrite: true}
|
|
runCustom(t, allTypes, []Config{conf}, func(t *testing.T, s state) {
|
|
assertPanic(t, func() { s.file.Create("some_file", p9.ReadWrite, 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())) })
|
|
assertPanic(t, func() { s.file.Mkdir("some_dir", 0777, p9.UID(os.Getuid()), p9.GID(os.Getgid())) })
|
|
assertPanic(t, func() { s.file.RenameAt("some_file", s.file, "other_file") })
|
|
assertPanic(t, func() { s.file.Symlink("some_place", "some_symlink", p9.UID(os.Getuid()), p9.GID(os.Getgid())) })
|
|
assertPanic(t, func() { s.file.UnlinkAt("some_file", 0) })
|
|
assertPanic(t, func() { s.file.Link(s.file, "some_link") })
|
|
|
|
valid := p9.SetAttrMask{Size: true}
|
|
attr := p9.SetAttr{Size: 0}
|
|
assertPanic(t, func() { s.file.SetAttr(valid, attr) })
|
|
})
|
|
}
|
|
|
|
func TestWalkNotFound(t *testing.T) {
|
|
runCustom(t, []fileType{directory}, allConfs, func(t *testing.T, s state) {
|
|
if _, _, err := s.file.Walk([]string{"nobody-here"}); err != syscall.ENOENT {
|
|
t.Errorf("%v: Walk(%q) should have failed, got: %v, expected: syscall.ENOENT", s, "nobody-here", err)
|
|
}
|
|
})
|
|
}
|
|
|
|
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 TestReaddir(t *testing.T) {
|
|
runCustom(t, []fileType{directory}, 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 := syscall.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, nil)", f)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
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)
|
|
}
|
|
}
|