Golang nodefs.MountFileSystem函數代碼示例

func setupCacheTest(t *testing.T) (string, *pathfs.PathNodeFs, func()) {
	dir, err := ioutil.TempDir("", "go-fuse-cachetest")
	if err != nil {
		t.Fatalf("TempDir failed: %v", err)
	}
	os.Mkdir(dir+"/mnt", 0755)
	os.Mkdir(dir+"/orig", 0755)

	fs := &cacheFs{
		pathfs.NewLoopbackFileSystem(dir + "/orig"),
	}
	pfs := pathfs.NewPathNodeFs(fs, nil)
	state, conn, err := nodefs.MountFileSystem(dir+"/mnt", pfs, nil)
	if err != nil {
		t.Fatalf("MountNodeFileSystem failed: %v", err)
	}
	state.SetDebug(VerboseTest())
	conn.SetDebug(VerboseTest())
	pfs.SetDebug(VerboseTest())
	go state.Serve()

	return dir, pfs, func() {
		err := state.Unmount()
		if err == nil {
			os.RemoveAll(dir)
		}
	}
}

func setupFAttrTest(t *testing.T, fs pathfs.FileSystem) (dir string, clean func()) {
	dir, err := ioutil.TempDir("", "go-fuse-fsetattr_test")
	if err != nil {
		t.Fatalf("TempDir failed: %v", err)
	}
	nfs := pathfs.NewPathNodeFs(fs, nil)
	state, _, err := nodefs.MountFileSystem(dir, nfs, nil)
	if err != nil {
		t.Fatalf("MountNodeFileSystem failed: %v", err)
	}
	state.SetDebug(VerboseTest())

	go state.Serve()

	// Trigger INIT.
	os.Lstat(dir)
	if state.KernelSettings().Flags&fuse.CAP_FILE_OPS == 0 {
		t.Log("Mount does not support file operations")
	}

	return dir, func() {
		if state.Unmount() == nil {
			os.RemoveAll(dir)
		}
	}
}

func setup(t *testing.T) (workdir string, cleanup func()) {
	wd, _ := ioutil.TempDir("", "")
	err := os.Mkdir(wd+"/mnt", 0700)
	if err != nil {
		t.Fatalf("Mkdir failed: %v", err)
	}

	err = os.Mkdir(wd+"/store", 0700)
	if err != nil {
		t.Fatalf("Mkdir failed: %v", err)
	}

	os.Mkdir(wd+"/ro", 0700)
	if err != nil {
		t.Fatalf("Mkdir failed: %v", err)
	}
	WriteFile(t, wd+"/ro/file1", "file1")
	WriteFile(t, wd+"/ro/file2", "file2")

	fs := NewAutoUnionFs(wd+"/store", testAOpts)

	nfs := pathfs.NewPathNodeFs(fs, nil)
	state, _, err := nodefs.MountFileSystem(wd+"/mnt", nfs, &testAOpts.Options)
	if err != nil {
		t.Fatalf("MountNodeFileSystem failed: %v", err)
	}
	fs.SetDebug(VerboseTest())
	go state.Serve()

	return wd, func() {
		state.Unmount()
		os.RemoveAll(wd)
	}
}

func setupFs(fs pathfs.FileSystem) (string, func()) {
	opts := &nodefs.Options{
		EntryTimeout:    0.0,
		AttrTimeout:     0.0,
		NegativeTimeout: 0.0,
	}
	mountPoint, _ := ioutil.TempDir("", "stat_test")
	nfs := pathfs.NewPathNodeFs(fs, nil)
	state, _, err := nodefs.MountFileSystem(mountPoint, nfs, opts)
	if err != nil {
		panic(fmt.Sprintf("cannot mount %v", err)) // ugh - benchmark has no error methods.
	}
	lmap := NewLatencyMap()

	state.RecordLatencies(lmap)
	// state.SetDebug(true)
	go state.Serve()

	return mountPoint, func() {
		lc, lns := lmap.Get("LOOKUP")
		gc, gns := lmap.Get("GETATTR")
		fmt.Printf("GETATTR %v/call n=%d, LOOKUP %v/call n=%d\n",
			gns/time.Duration(gc), gc,
			lns/time.Duration(lc), lc)

		err := state.Unmount()
		if err != nil {
			log.Println("error during unmount", err)
		} else {
			os.RemoveAll(mountPoint)
		}
	}
}

func NewNotifyTest(t *testing.T) *NotifyTest {
	me := &NotifyTest{}
	me.fs = newNotifyFs()
	var err error
	me.dir, err = ioutil.TempDir("", "go-fuse-notify_test")
	if err != nil {
		t.Fatalf("TempDir failed: %v", err)
	}
	entryTtl := 100 * time.Millisecond
	opts := &nodefs.Options{
		EntryTimeout:    entryTtl,
		AttrTimeout:     entryTtl,
		NegativeTimeout: entryTtl,
	}

	me.pathfs = pathfs.NewPathNodeFs(me.fs, nil)
	me.state, me.connector, err = nodefs.MountFileSystem(me.dir, me.pathfs, opts)
	if err != nil {
		t.Fatalf("MountNodeFileSystem failed: %v", err)
	}
	me.state.SetDebug(VerboseTest())
	go me.state.Serve()

	return me
}

func TestNonseekable(t *testing.T) {
	fs := &nonseekFs{FileSystem: pathfs.NewDefaultFileSystem()}
	fs.Length = 200 * 1024

	dir, err := ioutil.TempDir("", "go-fuse-cache_test")
	if err != nil {
		t.Fatalf("failed: %v", err)
	}
	defer os.RemoveAll(dir)
	nfs := pathfs.NewPathNodeFs(fs, nil)
	state, _, err := nodefs.MountFileSystem(dir, nfs, nil)
	if err != nil {
		t.Fatalf("failed: %v", err)
	}
	state.SetDebug(VerboseTest())
	defer state.Unmount()

	go state.Serve()

	f, err := os.Open(dir + "/file")
	if err != nil {
		t.Fatalf("failed: %v", err)
	}
	defer f.Close()

	b := make([]byte, 200)
	n, err := f.ReadAt(b, 20)
	if err == nil || n > 0 {
		t.Errorf("file was opened nonseekable, but seek successful")
	}
}

// Creates 3 directories on a temporary dir: /mnt with the overlayed
// (unionfs) mount, rw with modifiable data, and ro on the bottom.
func setupUfs(t *testing.T) (workdir string, cleanup func()) {
	// Make sure system setting does not affect test.
	syscall.Umask(0)

	wd, _ := ioutil.TempDir("", "unionfs")
	err := os.Mkdir(wd+"/mnt", 0700)
	if err != nil {
		t.Fatalf("Mkdir failed: %v", err)
	}

	err = os.Mkdir(wd+"/rw", 0700)
	if err != nil {
		t.Fatalf("Mkdir failed: %v", err)
	}

	os.Mkdir(wd+"/ro", 0700)
	if err != nil {
		t.Fatalf("Mkdir failed: %v", err)
	}

	var fses []pathfs.FileSystem
	fses = append(fses, pathfs.NewLoopbackFileSystem(wd+"/rw"))
	fses = append(fses,
		NewCachingFileSystem(pathfs.NewLoopbackFileSystem(wd+"/ro"), 0))
	ufs, err := NewUnionFs(fses, testOpts)
	if err != nil {
		t.Fatalf("NewUnionFs: %v", err)
	}
	// We configure timeouts are smaller, so we can check for
	// UnionFs's cache consistency.
	opts := &nodefs.Options{
		EntryTimeout:    entryTtl / 2,
		AttrTimeout:     entryTtl / 2,
		NegativeTimeout: entryTtl / 2,
		PortableInodes:  true,
	}

	pathfs := pathfs.NewPathNodeFs(ufs,
		&pathfs.PathNodeFsOptions{ClientInodes: true})
	state, conn, err := nodefs.MountFileSystem(wd+"/mnt", pathfs, opts)
	if err != nil {
		t.Fatalf("MountNodeFileSystem failed: %v", err)
	}
	conn.SetDebug(VerboseTest())
	state.SetDebug(VerboseTest())
	pathfs.SetDebug(VerboseTest())
	go state.Serve()

	return wd, func() {
		err := state.Unmount()
		if err != nil {
			return
		}
		setRecursiveWritable(t, wd, true)
		os.RemoveAll(wd)
	}
}

func main() {
	debug := flag.Bool("debug", false, "debug on")
	hardlinks := flag.Bool("hardlinks", false, "support hardlinks")
	delcache_ttl := flag.Float64("deletion_cache_ttl", 5.0, "Deletion cache TTL in seconds.")
	branchcache_ttl := flag.Float64("branchcache_ttl", 5.0, "Branch cache TTL in seconds.")
	deldirname := flag.String(
		"deletion_dirname", "GOUNIONFS_DELETIONS", "Directory name to use for deletions.")
	hide_readonly_link := flag.Bool("hide_readonly_link", true,
		"Hides READONLY link from the top mountpoints. "+
			"Enabled by default.")
	portableInodes := flag.Bool("portable-inodes", false,
		"Use sequential 32-bit inode numbers.")

	flag.Parse()

	if len(flag.Args()) < 2 {
		fmt.Println("Usage:\n  main MOUNTPOINT BASEDIR")
		os.Exit(2)
	}
	ufsOptions := unionfs.UnionFsOptions{
		DeletionCacheTTL: time.Duration(*delcache_ttl * float64(time.Second)),
		BranchCacheTTL:   time.Duration(*branchcache_ttl * float64(time.Second)),
		DeletionDirName:  *deldirname,
	}
	options := unionfs.AutoUnionFsOptions{
		UnionFsOptions: ufsOptions,
		Options: nodefs.Options{
			EntryTimeout:    time.Second,
			AttrTimeout:     time.Second,
			NegativeTimeout: time.Second,
			Owner:           fuse.CurrentOwner(),
		},
		UpdateOnMount: true,
		PathNodeFsOptions: pathfs.PathNodeFsOptions{
			ClientInodes: *hardlinks,
		},
		HideReadonly: *hide_readonly_link,
	}
	fsOpts := nodefs.Options{
		PortableInodes: *portableInodes,
	}
	gofs := unionfs.NewAutoUnionFs(flag.Arg(1), options)
	pathfs := pathfs.NewPathNodeFs(gofs, nil)
	state, conn, err := nodefs.MountFileSystem(flag.Arg(0), pathfs, &fsOpts)
	if err != nil {
		fmt.Printf("Mount fail: %v\n", err)
		os.Exit(1)
	}

	pathfs.SetDebug(*debug)
	conn.SetDebug(*debug)
	state.SetDebug(*debug)

	state.Serve()
	time.Sleep(1 * time.Second)
}

func main() {
	flag.Parse()

	fs, err := cloudfs.New(*data, *raddr)
	if err != nil {
		log.Fatal("Cloudfs initialization error: ", err)
	}

	nfs := pathfs.NewPathNodeFs(fs, nil)
	server, _, err := nodefs.MountFileSystem(*mnt, nfs, nil)
	if err != nil {
		log.Fatal("Mount fail: ", err)
	}
	server.Serve()
}

func setupOwnerTest(t *testing.T, opts *nodefs.Options) (workdir string, cleanup func()) {
	wd, err := ioutil.TempDir("", "go-fuse-owner_test")

	fs := &ownerFs{NewDefaultFileSystem()}
	nfs := NewPathNodeFs(fs, nil)
	state, _, err := nodefs.MountFileSystem(wd, nfs, opts)
	if err != nil {
		t.Fatalf("MountNodeFileSystem failed: %v", err)
	}
	go state.Serve()
	return wd, func() {
		state.Unmount()
		os.RemoveAll(wd)
	}
}

func TestGetAttrRace(t *testing.T) {
	dir, err := ioutil.TempDir("", "go-fuse-cache_test")
	if err != nil {
		t.Fatalf("failed: %v", err)
	}
	defer os.RemoveAll(dir)
	os.Mkdir(dir+"/mnt", 0755)
	os.Mkdir(dir+"/orig", 0755)

	fs := pathfs.NewLoopbackFileSystem(dir + "/orig")
	pfs := pathfs.NewPathNodeFs(fs, nil)
	state, conn, err := nodefs.MountFileSystem(dir+"/mnt", pfs,
		&nodefs.Options{})
	if err != nil {
		t.Fatalf("MountNodeFileSystem failed: %v", err)
	}
	state.SetDebug(VerboseTest())
	conn.SetDebug(VerboseTest())
	pfs.SetDebug(VerboseTest())
	go state.Serve()

	defer state.Unmount()

	var wg sync.WaitGroup

	n := 100
	wg.Add(n)
	var statErr error
	for i := 0; i < n; i++ {
		go func() {
			defer wg.Done()
			fn := dir + "/mnt/file"
			err := ioutil.WriteFile(fn, []byte{42}, 0644)
			if err != nil {
				statErr = err
				return
			}
			_, err = os.Lstat(fn)
			if err != nil {
				statErr = err
			}
		}()
	}
	wg.Wait()
	if statErr != nil {
		t.Error(statErr)
	}
}

func setupZipfs(t *testing.T) (mountPoint string, cleanup func()) {
	zfs, err := NewArchiveFileSystem(testZipFile())
	if err != nil {
		t.Fatalf("NewArchiveFileSystem failed: %v", err)
	}

	mountPoint, _ = ioutil.TempDir("", "")
	state, _, err := nodefs.MountFileSystem(mountPoint, zfs, nil)

	state.SetDebug(VerboseTest())
	go state.Serve()

	return mountPoint, func() {
		state.Unmount()
		os.RemoveAll(mountPoint)
	}
}

func main() {

	var commandLine = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
	var kafkaAddrs = commandLine.String("kafkaAddrs", "localhost:9092",
		"Kafka server addresses host1:port1[;host2:port2...]")
	var metadataRetries = commandLine.Int("metadataRetries", 10,
		"Max times to attempt metadata refresh from Kafka before failing")
	var waitForElectionMs = commandLine.Int("waitForElectionMs", 250,
		"Max milliseconds to wait for Kafka leader election before failing")
	var maxMsgBytes = commandLine.Int("maxMsgBytes", 1024*1024*10,
		"Max bytes to pull for a single message")

	commandLine.Parse(os.Args[1:])

	commandLine.Usage = func() {
		fmt.Fprintf(os.Stderr, "usage: kafkafs [options] mountpoint\n")
		commandLine.PrintDefaults()
		os.Exit(2)
	}

	if commandLine.NArg() != 1 {
		commandLine.Usage()
	}

	mountpoint := commandLine.Arg(0)

	addrs := strings.Split(*kafkaAddrs, ";")
	client, err := sarama.NewClient("kafkafs", addrs,
		&sarama.ClientConfig{MetadataRetries: *metadataRetries,
			WaitForElection: time.Duration(*waitForElectionMs) * time.Millisecond})
	if err != nil {
		log.Fatalf("Error from client %s", err)
	}

	kClient := kafkafs.NewKafkaClient(client, int32(*maxMsgBytes))

	nfs := pathfs.NewPathNodeFs(kafkafs.NewKafkaRoFs(kClient), nil)

	server, _, err := nodefs.MountFileSystem(mountpoint, nfs, nil)

	c := make(chan os.Signal, 1)
	signal.Notify(c, os.Interrupt)

	go unmountOnInt(c, server, client)
	server.Serve()
}

func setupMzfs(t *testing.T) (mountPoint string, cleanup func()) {
	fs := NewMultiZipFs()
	mountPoint, _ = ioutil.TempDir("", "")
	nfs := pathfs.NewPathNodeFs(fs, nil)
	state, _, err := nodefs.MountFileSystem(mountPoint, nfs, &nodefs.Options{
		EntryTimeout:    testTtl,
		AttrTimeout:     testTtl,
		NegativeTimeout: 0.0,
	})
	if err != nil {
		t.Fatalf("MountNodeFileSystem failed: %v", err)
	}
	state.SetDebug(VerboseTest())
	go state.Serve()

	return mountPoint, func() {
		state.Unmount()
		os.RemoveAll(mountPoint)
	}
}

func xattrTestCase(t *testing.T, nm string) (mountPoint string, cleanup func()) {
	xfs := NewXAttrFs(nm, xattrGolden)
	xfs.tester = t
	mountPoint, err := ioutil.TempDir("", "go-fuse-xattr_test")
	if err != nil {
		t.Fatalf("TempDir failed: %v", err)
	}

	nfs := NewPathNodeFs(xfs, nil)
	state, _, err := nodefs.MountFileSystem(mountPoint, nfs, nil)
	if err != nil {
		t.Fatalf("TempDir failed: %v", err)
	}
	state.SetDebug(VerboseTest())

	go state.Serve()
	return mountPoint, func() {
		state.Unmount()
		os.RemoveAll(mountPoint)
	}
}