Update bazil.org/fuse

vendor/manifest

@@ -4,8 +4,8 @@
 		{
 			"importpath": "bazil.org/fuse",
 			"repository": "https://github.com/bazil/fuse",
-			"revision": "18419ee53958df28fcfc9490fe6123bd59e237bb",
+			"revision": "371fbbdaa8987b715bdd21d6adc4c9b20155f748",
-			"branch": "HEAD"
+			"branch": "master"
 		},
 		{
 			"importpath": "github.com/elithrar/simple-scrypt",

vendor/src/bazil.org/fuse/examples/clockfs/clockfs.go

@@ -24,16 +24,7 @@ func usage() {
 	flag.PrintDefaults()
 }
 
-func main() {
+func run(mountpoint string) error {
-	flag.Usage = usage
-	flag.Parse()
-
-	if flag.NArg() != 1 {
-		usage()
-		os.Exit(2)
-	}
-	mountpoint := flag.Arg(0)
-
 	c, err := fuse.Mount(
 		mountpoint,
 		fuse.FSName("clock"),
@@ -42,10 +33,14 @@ func main() {
 		fuse.VolumeName("Clock filesystem"),
 	)
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
 	defer c.Close()
 
+	if p := c.Protocol(); !p.HasInvalidate() {
+		return fmt.Errorf("kernel FUSE support is too old to have invalidations: version %v", p)
+	}
+
 	srv := fs.New(c, nil)
 	filesys := &FS{
 		// We pre-create the clock node so that it's always the same
@@ -61,12 +56,28 @@ func main() {
 	// This goroutine never exits. That's fine for this example.
 	go filesys.clockFile.update()
 	if err := srv.Serve(filesys); err != nil {
-		log.Fatal(err)
+		return err
 	}
 
 	// Check if the mount process has an error to report.
 	<-c.Ready
 	if err := c.MountError; err != nil {
+		return err
+	}
+	return nil
+}
+
+func main() {
+	flag.Usage = usage
+	flag.Parse()
+
+	if flag.NArg() != 1 {
+		usage()
+		os.Exit(2)
+	}
+	mountpoint := flag.Arg(0)
+
+	if err := run(mountpoint); err != nil {
 		log.Fatal(err)
 	}
 }

vendor/src/bazil.org/fuse/examples/hellofs/hello.go

@@ -13,18 +13,18 @@ import (
 	"golang.org/x/net/context"
 )
 
-var Usage = func() {
+func usage() {
 	fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
 	fmt.Fprintf(os.Stderr, "  %s MOUNTPOINT\n", os.Args[0])
 	flag.PrintDefaults()
 }
 
 func main() {
-	flag.Usage = Usage
+	flag.Usage = usage
 	flag.Parse()
 
 	if flag.NArg() != 1 {
-		Usage()
+		usage()
 		os.Exit(2)
 	}
 	mountpoint := flag.Arg(0)

vendor/src/bazil.org/fuse/fs/bench/bench_create_test.go

@@ -0,0 +1,54 @@
+package bench_test
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"bazil.org/fuse"
+	"bazil.org/fuse/fs"
+	"bazil.org/fuse/fs/fstestutil"
+	"golang.org/x/net/context"
+)
+
+type dummyFile struct {
+	fstestutil.File
+}
+
+type benchCreateDir struct {
+	fstestutil.Dir
+}
+
+var _ fs.NodeCreater = (*benchCreateDir)(nil)
+
+func (f *benchCreateDir) Create(ctx context.Context, req *fuse.CreateRequest, resp *fuse.CreateResponse) (fs.Node, fs.Handle, error) {
+	child := &dummyFile{}
+	return child, child, nil
+}
+
+func BenchmarkCreate(b *testing.B) {
+	f := &benchCreateDir{}
+	mnt, err := fstestutil.MountedT(b, fstestutil.SimpleFS{f}, nil)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer mnt.Close()
+
+	// prepare file names to decrease test overhead
+	names := make([]string, 0, b.N)
+	for i := 0; i < b.N; i++ {
+		// zero-padded so cost stays the same on every iteration
+		names = append(names, mnt.Dir+"/"+fmt.Sprintf("%08x", i))
+	}
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		f, err := os.Create(names[i])
+		if err != nil {
+			b.Fatalf("WriteFile: %v", err)
+		}
+		f.Close()
+	}
+
+	b.StopTimer()
+}

vendor/src/bazil.org/fuse/fs/bench/bench_lookup_test.go

@@ -0,0 +1,42 @@
+package bench_test
+
+import (
+	"os"
+	"testing"
+
+	"golang.org/x/net/context"
+
+	"bazil.org/fuse"
+	"bazil.org/fuse/fs"
+	"bazil.org/fuse/fs/fstestutil"
+)
+
+type benchLookupDir struct {
+	fstestutil.Dir
+}
+
+var _ fs.NodeRequestLookuper = (*benchLookupDir)(nil)
+
+func (f *benchLookupDir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (fs.Node, error) {
+	return nil, fuse.ENOENT
+}
+
+func BenchmarkLookup(b *testing.B) {
+	f := &benchLookupDir{}
+	mnt, err := fstestutil.MountedT(b, fstestutil.SimpleFS{f}, nil)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer mnt.Close()
+
+	name := mnt.Dir + "/does-not-exist"
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		if _, err := os.Stat(name); !os.IsNotExist(err) {
+			b.Fatalf("Stat: wrong error: %v", err)
+		}
+	}
+
+	b.StopTimer()
+}

vendor/src/bazil.org/fuse/fs/fstestutil/checkdir.go

@@ -0,0 +1,70 @@
+package fstestutil
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+)
+
+// FileInfoCheck is a function that validates an os.FileInfo according
+// to some criteria.
+type FileInfoCheck func(fi os.FileInfo) error
+
+type checkDirError struct {
+	missing map[string]struct{}
+	extra   map[string]os.FileMode
+}
+
+func (e *checkDirError) Error() string {
+	return fmt.Sprintf("wrong directory contents: missing %v, extra %v", e.missing, e.extra)
+}
+
+// CheckDir checks the contents of the directory at path, making sure
+// every directory entry listed in want is present. If the check is
+// not nil, it must also pass.
+//
+// If want contains the impossible filename "", unexpected files are
+// checked with that. If the key is not in want, unexpected files are
+// an error.
+//
+// Missing entries, that are listed in want but not seen, are an
+// error.
+func CheckDir(path string, want map[string]FileInfoCheck) error {
+	problems := &checkDirError{
+		missing: make(map[string]struct{}, len(want)),
+		extra:   make(map[string]os.FileMode),
+	}
+	for k := range want {
+		if k == "" {
+			continue
+		}
+		problems.missing[k] = struct{}{}
+	}
+
+	fis, err := ioutil.ReadDir(path)
+	if err != nil {
+		return fmt.Errorf("cannot read directory: %v", err)
+	}
+
+	for _, fi := range fis {
+		check, ok := want[fi.Name()]
+		if !ok {
+			check, ok = want[""]
+		}
+		if !ok {
+			problems.extra[fi.Name()] = fi.Mode()
+			continue
+		}
+		delete(problems.missing, fi.Name())
+		if check != nil {
+			if err := check(fi); err != nil {
+				return fmt.Errorf("check failed: %v: %v", fi.Name(), err)
+			}
+		}
+	}
+
+	if len(problems.missing) > 0 || len(problems.extra) > 0 {
+		return problems
+	}
+	return nil
+}

vendor/src/bazil.org/fuse/fs/fstestutil/mounted.go

@@ -50,13 +50,15 @@ func (mnt *Mount) Close() {
 	os.Remove(mnt.Dir)
 }
 
-// Mounted mounts the fuse.Server at a temporary directory.
+// MountedFunc mounts a filesystem at a temporary directory. The
+// filesystem used is constructed by calling a function, to allow
+// storing fuse.Conn and fs.Server in the FS.
 //
 // It also waits until the filesystem is known to be visible (OS X
 // workaround).
 //
 // After successful return, caller must clean up by calling Close.
-func Mounted(filesys fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
+func MountedFunc(fn func(*Mount) fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
 	dir, err := ioutil.TempDir("", "fusetest")
 	if err != nil {
 		return nil, err
@@ -75,6 +77,7 @@ func Mounted(filesys fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Moun
 		Error:  serveErr,
 		done:   done,
 	}
+	filesys := fn(mnt)
 	go func() {
 		defer close(done)
 		serveErr <- server.Serve(filesys)
@@ -95,14 +98,25 @@ func Mounted(filesys fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Moun
 	}
 }
 
-// MountedT mounts the filesystem at a temporary directory,
+// Mounted mounts the fuse.Server at a temporary directory.
+//
+// It also waits until the filesystem is known to be visible (OS X
+// workaround).
+//
+// After successful return, caller must clean up by calling Close.
+func Mounted(filesys fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
+	fn := func(*Mount) fs.FS { return filesys }
+	return MountedFunc(fn, conf, options...)
+}
+
+// MountedFuncT mounts a filesystem at a temporary directory,
 // directing it's debug log to the testing logger.
 //
-// See Mounted for usage.
+// See MountedFunc for usage.
 //
 // The debug log is not enabled by default. Use `-fuse.debug` or call
 // DebugByDefault to enable.
-func MountedT(t testing.TB, filesys fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
+func MountedFuncT(t testing.TB, fn func(*Mount) fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
 	if conf == nil {
 		conf = &fs.Config{}
 	}
@@ -111,5 +125,17 @@ func MountedT(t testing.TB, filesys fs.FS, conf *fs.Config, options ...fuse.Moun
 			t.Logf("FUSE: %s", msg)
 		}
 	}
-	return Mounted(filesys, conf, options...)
+	return MountedFunc(fn, conf, options...)
+}
+
+// MountedT mounts the filesystem at a temporary directory,
+// directing it's debug log to the testing logger.
+//
+// See Mounted for usage.
+//
+// The debug log is not enabled by default. Use `-fuse.debug` or call
+// DebugByDefault to enable.
+func MountedT(t testing.TB, filesys fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
+	fn := func(*Mount) fs.FS { return filesys }
+	return MountedFuncT(t, fn, conf, options...)
 }

vendor/src/bazil.org/fuse/fs/fstestutil/record/record.go

@@ -382,3 +382,28 @@ func (r *Removexattrs) RecordedRemovexattr() fuse.RemovexattrRequest {
 	}
 	return *(val.(*fuse.RemovexattrRequest))
 }
+
+// Creates records a Create request and its fields.
+type Creates struct {
+	rec RequestRecorder
+}
+
+var _ = fs.NodeCreater(&Creates{})
+
+// Create records the request and returns an error. Most callers should
+// wrap this call in a function that returns a more useful result.
+func (r *Creates) Create(ctx context.Context, req *fuse.CreateRequest, resp *fuse.CreateResponse) (fs.Node, fs.Handle, error) {
+	tmp := *req
+	r.rec.RecordRequest(&tmp)
+	return nil, nil, fuse.EIO
+}
+
+// RecordedCreate returns information about the Create request.
+// If no request was seen, returns a zero value.
+func (r *Creates) RecordedCreate() fuse.CreateRequest {
+	val := r.rec.Recorded()
+	if val == nil {
+		return fuse.CreateRequest{}
+	}
+	return *(val.(*fuse.CreateRequest))
+}

vendor/src/bazil.org/fuse/fs/serve.go

@@ -18,6 +18,8 @@ import (
 )
 
 import (
+	"bytes"
+
 	"bazil.org/fuse"
 	"bazil.org/fuse/fuseutil"
 )
@@ -89,6 +91,13 @@ type FSInodeGenerator interface {
 // simple, read-only filesystem.
 type Node interface {
 	// Attr fills attr with the standard metadata for the node.
+	//
+	// Fields with reasonable defaults are prepopulated. For example,
+	// all times are set to a fixed moment when the program started.
+	//
+	// If Inode is left as 0, a dynamic inode number is chosen.
+	//
+	// The result may be cached for the duration set in Valid.
 	Attr(ctx context.Context, attr *fuse.Attr) error
 }
 
@@ -105,9 +114,7 @@ type NodeSetattrer interface {
 	// Setattr sets the standard metadata for the receiver.
 	//
 	// Note, this is also used to communicate changes in the size of
-	// the file. Not implementing Setattr causes writes to be unable
+	// the file, outside of Writes.
-	// to grow the file (except with OpenDirectIO, which bypasses that
-	// mechanism).
 	//
 	// req.Valid is a bitmask of what fields are actually being set.
 	// For example, the method should not change the mode of the file
@@ -297,16 +304,17 @@ type HandleReader interface {
 }
 
 type HandleWriter interface {
-	// Write requests to write data into the handle.
+	// Write requests to write data into the handle at the given offset.
+	// Store the amount of data written in resp.Size.
 	//
 	// There is a writeback page cache in the kernel that normally submits
 	// only page-aligned writes spanning one or more pages. However,
 	// you should not rely on this. To see individual requests as
 	// submitted by the file system clients, set OpenDirectIO.
 	//
-	// Note that file size changes are communicated through Setattr.
+	// Writes that grow the file are expected to update the file size
-	// Writes beyond the size of the file as reported by Attr are not
+	// (as seen through Attr). Note that file size changes are
-	// even attempted (except in OpenDirectIO mode).
+	// communicated also through Setattr.
 	Write(ctx context.Context, req *fuse.WriteRequest, resp *fuse.WriteResponse) error
 }
 
@@ -322,11 +330,13 @@ type Config struct {
 	// See fuse.Debug for the rules that log functions must follow.
 	Debug func(msg interface{})
 
-	// Function to create new contexts. If nil, use
+	// Function to put things into context for processing the request.
-	// context.Background.
+	// The returned context must have ctx as its parent.
 	//
 	// Note that changing this may not affect existing calls to Serve.
-	GetContext func() context.Context
+	//
+	// Must not retain req.
+	WithContext func(ctx context.Context, req fuse.Request) context.Context
 }
 
 // New returns a new FUSE server ready to serve this kernel FUSE
@@ -342,14 +352,11 @@ func New(conn *fuse.Conn, config *Config) *Server {
 	}
 	if config != nil {
 		s.debug = config.Debug
-		s.context = config.GetContext
+		s.context = config.WithContext
 	}
 	if s.debug == nil {
 		s.debug = fuse.Debug
 	}
-	if s.context == nil {
-		s.context = context.Background
-	}
 	return s
 }
 
@@ -357,7 +364,7 @@ type Server struct {
 	// set in New
 	conn    *fuse.Conn
 	debug   func(msg interface{})
-	context func() context.Context
+	context func(ctx context.Context, req fuse.Request) context.Context
 
 	// set once at Serve time
 	fs           FS
@@ -494,7 +501,7 @@ func (c *Server) saveNode(inode uint64, node Node) (id fuse.NodeID, gen uint64)
 	}
 	sn.generation = c.nodeGen
 	c.nodeRef[node] = id
-	return
+	return id, sn.generation
 }
 
 func (c *Server) saveHandle(handle Handle, nodeID fuse.NodeID) (id fuse.HandleID) {
@@ -601,7 +608,7 @@ type logResponseHeader struct {
 }
 
 func (m logResponseHeader) String() string {
-	return fmt.Sprintf("ID=%#x", m.ID)
+	return fmt.Sprintf("ID=%v", m.ID)
 }
 
 type response struct {
@@ -626,21 +633,21 @@ func (r response) errstr() string {
 func (r response) String() string {
 	switch {
 	case r.Errno != "" && r.Out != nil:
-		return fmt.Sprintf("-> %s error=%s %s", r.Request, r.errstr(), r.Out)
+		return fmt.Sprintf("-> [%v] %v error=%s", r.Request, r.Out, r.errstr())
 	case r.Errno != "":
-		return fmt.Sprintf("-> %s error=%s", r.Request, r.errstr())
+		return fmt.Sprintf("-> [%v] %s error=%s", r.Request, r.Op, r.errstr())
 	case r.Out != nil:
 		// make sure (seemingly) empty values are readable
 		switch r.Out.(type) {
 		case string:
-			return fmt.Sprintf("-> %s %q", r.Request, r.Out)
+			return fmt.Sprintf("-> [%v] %s %q", r.Request, r.Op, r.Out)
 		case []byte:
-			return fmt.Sprintf("-> %s [% x]", r.Request, r.Out)
+			return fmt.Sprintf("-> [%v] %s [% x]", r.Request, r.Op, r.Out)
 		default:
-			return fmt.Sprintf("-> %s %s", r.Request, r.Out)
+			return fmt.Sprintf("-> [%v] %v", r.Request, r.Out)
 		}
 	default:
-		return fmt.Sprintf("-> %s", r.Request)
+		return fmt.Sprintf("-> [%v] %s", r.Request, r.Op)
 	}
 }
 
@@ -652,20 +659,23 @@ type notification struct {
 }
 
 func (n notification) String() string {
-	switch {
+	var buf bytes.Buffer
-	case n.Out != nil:
+	fmt.Fprintf(&buf, "=> %s %v", n.Op, n.Node)
+	if n.Out != nil {
 		// make sure (seemingly) empty values are readable
 		switch n.Out.(type) {
 		case string:
-			return fmt.Sprintf("=> %s %d %q Err:%v", n.Op, n.Node, n.Out, n.Err)
+			fmt.Fprintf(&buf, " %q", n.Out)
 		case []byte:
-			return fmt.Sprintf("=> %s %d [% x] Err:%v", n.Op, n.Node, n.Out, n.Err)
+			fmt.Fprintf(&buf, " [% x]", n.Out)
 		default:
-			return fmt.Sprintf("=> %s %d %s Err:%v", n.Op, n.Node, n.Out, n.Err)
+			fmt.Fprintf(&buf, " %s", n.Out)
 		}
-	default:
-		return fmt.Sprintf("=> %s %d Err:%v", n.Op, n.Node, n.Err)
 	}
+	if n.Err != "" {
+		fmt.Fprintf(&buf, " Err:%v", n.Err)
+	}
+	return buf.String()
 }
 
 type logMissingNode struct {
@@ -685,7 +695,7 @@ type logLinkRequestOldNodeNotFound struct {
 }
 
 func (m *logLinkRequestOldNodeNotFound) String() string {
-	return fmt.Sprintf("In LinkRequest (request %#x), node %d not found", m.Request.Hdr().ID, m.In.OldNode)
+	return fmt.Sprintf("In LinkRequest (request %v), node %d not found", m.Request.Hdr().ID, m.In.OldNode)
 }
 
 type renameNewDirNodeNotFound struct {
@@ -694,7 +704,7 @@ type renameNewDirNodeNotFound struct {
 }
 
 func (m *renameNewDirNodeNotFound) String() string {
-	return fmt.Sprintf("In RenameRequest (request %#x), node %d not found", m.Request.Hdr().ID, m.In.NewDir)
+	return fmt.Sprintf("In RenameRequest (request %v), node %d not found", m.Request.Hdr().ID, m.In.NewDir)
 }
 
 type handlerPanickedError struct {
@@ -717,13 +727,52 @@ func (h handlerPanickedError) Errno() fuse.Errno {
 	return fuse.DefaultErrno
 }
 
+// handlerTerminatedError happens when a handler terminates itself
+// with runtime.Goexit. This is most commonly because of incorrect use
+// of testing.TB.FailNow, typically via t.Fatal.
+type handlerTerminatedError struct {
+	Request interface{}
+}
+
+var _ error = handlerTerminatedError{}
+
+func (h handlerTerminatedError) Error() string {
+	return fmt.Sprintf("handler terminated (called runtime.Goexit)")
+}
+
+var _ fuse.ErrorNumber = handlerTerminatedError{}
+
+func (h handlerTerminatedError) Errno() fuse.Errno {
+	return fuse.DefaultErrno
+}
+
+type handleNotReaderError struct {
+	handle Handle
+}
+
+var _ error = handleNotReaderError{}
+
+func (e handleNotReaderError) Error() string {
+	return fmt.Sprintf("handle has no Read: %T", e.handle)
+}
+
+var _ fuse.ErrorNumber = handleNotReaderError{}
+
+func (e handleNotReaderError) Errno() fuse.Errno {
+	return fuse.ENOTSUP
+}
+
 func initLookupResponse(s *fuse.LookupResponse) {
 	s.EntryValid = entryValidTime
 }
 
 func (c *Server) serve(r fuse.Request) {
-	ctx, cancel := context.WithCancel(c.context())
+	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
+	parentCtx := ctx
+	if c.context != nil {
+		ctx = c.context(ctx, r)
+	}
 
 	req := &serveRequest{Request: r, cancel: cancel}
 
@@ -800,6 +849,7 @@ func (c *Server) serve(r fuse.Request) {
 		c.meta.Unlock()
 	}
 
+	var responded bool
 	defer func() {
 		if rec := recover(); rec != nil {
 			const size = 1 << 16
@@ -813,114 +863,132 @@ func (c *Server) serve(r fuse.Request) {
 			}
 			done(err)
 			r.RespondError(err)
+			return
+		}
+
+		if !responded {
+			err := handlerTerminatedError{
+				Request: r,
+			}
+			done(err)
+			r.RespondError(err)
 		}
 	}()
 
+	if err := c.handleRequest(ctx, node, snode, r, done); err != nil {
+		if err == context.Canceled {
+			select {
+			case <-parentCtx.Done():
+				// We canceled the parent context because of an
+				// incoming interrupt request, so return EINTR
+				// to trigger the right behavior in the client app.
+				//
+				// Only do this when it's the parent context that was
+				// canceled, not a context controlled by the program
+				// using this library, so we don't return EINTR too
+				// eagerly -- it might cause busy loops.
+				//
+				// Decent write-up on role of EINTR:
+				// http://250bpm.com/blog:12
+				err = fuse.EINTR
+			default:
+				// nothing
+			}
+		}
+		done(err)
+		r.RespondError(err)
+	}
+
+	// disarm runtime.Goexit protection
+	responded = true
+}
+
+// handleRequest will either a) call done(s) and r.Respond(s) OR b) return an error.
+func (c *Server) handleRequest(ctx context.Context, node Node, snode *serveNode, r fuse.Request, done func(resp interface{})) error {
 	switch r := r.(type) {
 	default:
 		// Note: To FUSE, ENOSYS means "this server never implements this request."
 		// It would be inappropriate to return ENOSYS for other operations in this
 		// switch that might only be unavailable in some contexts, not all.
-		done(fuse.ENOSYS)
+		return fuse.ENOSYS
-		r.RespondError(fuse.ENOSYS)
 
 	case *fuse.StatfsRequest:
 		s := &fuse.StatfsResponse{}
 		if fs, ok := c.fs.(FSStatfser); ok {
 			if err := fs.Statfs(ctx, r, s); err != nil {
-				done(err)
+				return err
-				r.RespondError(err)
-				break
 			}
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	// Node operations.
 	case *fuse.GetattrRequest:
 		s := &fuse.GetattrResponse{}
 		if n, ok := node.(NodeGetattrer); ok {
 			if err := n.Getattr(ctx, r, s); err != nil {
-				done(err)
+				return err
-				r.RespondError(err)
-				break
 			}
 		} else {
 			if err := snode.attr(ctx, &s.Attr); err != nil {
-				done(err)
+				return err
-				r.RespondError(err)
-				break
 			}
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.SetattrRequest:
 		s := &fuse.SetattrResponse{}
 		if n, ok := node.(NodeSetattrer); ok {
 			if err := n.Setattr(ctx, r, s); err != nil {
-				done(err)
+				return err
-				r.RespondError(err)
-				break
 			}
-			done(s)
-			r.Respond(s)
-			break
 		}
 
 		if err := snode.attr(ctx, &s.Attr); err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.SymlinkRequest:
 		s := &fuse.SymlinkResponse{}
 		initLookupResponse(&s.LookupResponse)
 		n, ok := node.(NodeSymlinker)
 		if !ok {
-			done(fuse.EIO) // XXX or EPERM like Mkdir?
+			return fuse.EIO // XXX or EPERM like Mkdir?
-			r.RespondError(fuse.EIO)
-			break
 		}
 		n2, err := n.Symlink(ctx, r)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		if err := c.saveLookup(ctx, &s.LookupResponse, snode, r.NewName, n2); err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.ReadlinkRequest:
 		n, ok := node.(NodeReadlinker)
 		if !ok {
-			done(fuse.EIO) /// XXX or EPERM?
+			return fuse.EIO /// XXX or EPERM?
-			r.RespondError(fuse.EIO)
-			break
 		}
 		target, err := n.Readlink(ctx, r)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(target)
 		r.Respond(target)
+		return nil
 
 	case *fuse.LinkRequest:
 		n, ok := node.(NodeLinker)
 		if !ok {
-			done(fuse.EIO) /// XXX or EPERM?
+			return fuse.EIO /// XXX or EPERM?
-			r.RespondError(fuse.EIO)
-			break
 		}
 		c.meta.Lock()
 		var oldNode *serveNode
@@ -933,52 +1001,43 @@ func (c *Server) serve(r fuse.Request) {
 				Request: r.Hdr(),
 				In:      r,
 			})
-			done(fuse.EIO)
+			return fuse.EIO
-			r.RespondError(fuse.EIO)
-			break
 		}
 		n2, err := n.Link(ctx, r, oldNode.node)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		s := &fuse.LookupResponse{}
 		initLookupResponse(s)
 		if err := c.saveLookup(ctx, s, snode, r.NewName, n2); err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.RemoveRequest:
 		n, ok := node.(NodeRemover)
 		if !ok {
-			done(fuse.EIO) /// XXX or EPERM?
+			return fuse.EIO /// XXX or EPERM?
-			r.RespondError(fuse.EIO)
-			break
 		}
 		err := n.Remove(ctx, r)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(nil)
 		r.Respond()
+		return nil
 
 	case *fuse.AccessRequest:
 		if n, ok := node.(NodeAccesser); ok {
 			if err := n.Access(ctx, r); err != nil {
-				done(err)
+				return err
-				r.RespondError(err)
-				break
 			}
 		}
 		done(nil)
 		r.Respond()
+		return nil
 
 	case *fuse.LookupRequest:
 		var n2 Node
@@ -990,45 +1049,35 @@ func (c *Server) serve(r fuse.Request) {
 		} else if n, ok := node.(NodeRequestLookuper); ok {
 			n2, err = n.Lookup(ctx, r, s)
 		} else {
-			done(fuse.ENOENT)
+			return fuse.ENOENT
-			r.RespondError(fuse.ENOENT)
-			break
 		}
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		if err := c.saveLookup(ctx, s, snode, r.Name, n2); err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.MkdirRequest:
 		s := &fuse.MkdirResponse{}
 		initLookupResponse(&s.LookupResponse)
 		n, ok := node.(NodeMkdirer)
 		if !ok {
-			done(fuse.EPERM)
+			return fuse.EPERM
-			r.RespondError(fuse.EPERM)
-			break
 		}
 		n2, err := n.Mkdir(ctx, r)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		if err := c.saveLookup(ctx, &s.LookupResponse, snode, r.Name, n2); err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.OpenRequest:
 		s := &fuse.OpenResponse{}
@@ -1036,121 +1085,99 @@ func (c *Server) serve(r fuse.Request) {
 		if n, ok := node.(NodeOpener); ok {
 			hh, err := n.Open(ctx, r, s)
 			if err != nil {
-				done(err)
+				return err
-				r.RespondError(err)
-				break
 			}
 			h2 = hh
 		} else {
 			h2 = node
 		}
-		s.Handle = c.saveHandle(h2, hdr.Node)
+		s.Handle = c.saveHandle(h2, r.Hdr().Node)
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.CreateRequest:
 		n, ok := node.(NodeCreater)
 		if !ok {
 			// If we send back ENOSYS, FUSE will try mknod+open.
-			done(fuse.EPERM)
+			return fuse.EPERM
-			r.RespondError(fuse.EPERM)
-			break
 		}
 		s := &fuse.CreateResponse{OpenResponse: fuse.OpenResponse{}}
 		initLookupResponse(&s.LookupResponse)
 		n2, h2, err := n.Create(ctx, r, s)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		if err := c.saveLookup(ctx, &s.LookupResponse, snode, r.Name, n2); err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
-		s.Handle = c.saveHandle(h2, hdr.Node)
+		s.Handle = c.saveHandle(h2, r.Hdr().Node)
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.GetxattrRequest:
 		n, ok := node.(NodeGetxattrer)
 		if !ok {
-			done(fuse.ENOTSUP)
+			return fuse.ENOTSUP
-			r.RespondError(fuse.ENOTSUP)
-			break
 		}
 		s := &fuse.GetxattrResponse{}
 		err := n.Getxattr(ctx, r, s)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		if r.Size != 0 && uint64(len(s.Xattr)) > uint64(r.Size) {
-			done(fuse.ERANGE)
+			return fuse.ERANGE
-			r.RespondError(fuse.ERANGE)
-			break
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.ListxattrRequest:
 		n, ok := node.(NodeListxattrer)
 		if !ok {
-			done(fuse.ENOTSUP)
+			return fuse.ENOTSUP
-			r.RespondError(fuse.ENOTSUP)
-			break
 		}
 		s := &fuse.ListxattrResponse{}
 		err := n.Listxattr(ctx, r, s)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		if r.Size != 0 && uint64(len(s.Xattr)) > uint64(r.Size) {
-			done(fuse.ERANGE)
+			return fuse.ERANGE
-			r.RespondError(fuse.ERANGE)
-			break
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.SetxattrRequest:
 		n, ok := node.(NodeSetxattrer)
 		if !ok {
-			done(fuse.ENOTSUP)
+			return fuse.ENOTSUP
-			r.RespondError(fuse.ENOTSUP)
-			break
 		}
 		err := n.Setxattr(ctx, r)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(nil)
 		r.Respond()
+		return nil
 
 	case *fuse.RemovexattrRequest:
 		n, ok := node.(NodeRemovexattrer)
 		if !ok {
-			done(fuse.ENOTSUP)
+			return fuse.ENOTSUP
-			r.RespondError(fuse.ENOTSUP)
-			break
 		}
 		err := n.Removexattr(ctx, r)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(nil)
 		r.Respond()
+		return nil
 
 	case *fuse.ForgetRequest:
-		forget := c.dropNode(hdr.Node, r.N)
+		forget := c.dropNode(r.Hdr().Node, r.N)
 		if forget {
 			n, ok := node.(NodeForgetter)
 			if ok {
@@ -1159,26 +1186,29 @@ func (c *Server) serve(r fuse.Request) {
 		}
 		done(nil)
 		r.Respond()
+		return nil
 
 	// Handle operations.
 	case *fuse.ReadRequest:
 		shandle := c.getHandle(r.Handle)
 		if shandle == nil {
-			done(fuse.ESTALE)
+			return fuse.ESTALE
-			r.RespondError(fuse.ESTALE)
-			return
 		}
 		handle := shandle.handle
 
 		s := &fuse.ReadResponse{Data: make([]byte, 0, r.Size)}
 		if r.Dir {
 			if h, ok := handle.(HandleReadDirAller); ok {
+				// detect rewinddir(3) or similar seek and refresh
+				// contents
+				if r.Offset == 0 {
+					shandle.readData = nil
+				}
+
 				if shandle.readData == nil {
 					dirs, err := h.ReadDirAll(ctx)
 					if err != nil {
-						done(err)
+						return err
-						r.RespondError(err)
-						break
 					}
 					var data []byte
 					for _, dir := range dirs {
@@ -1192,16 +1222,14 @@ func (c *Server) serve(r fuse.Request) {
 				fuseutil.HandleRead(r, s, shandle.readData)
 				done(s)
 				r.Respond(s)
-				break
+				return nil
 			}
 		} else {
 			if h, ok := handle.(HandleReadAller); ok {
 				if shandle.readData == nil {
 					data, err := h.ReadAll(ctx)
 					if err != nil {
-						done(err)
+						return err
-						r.RespondError(err)
-						break
 					}
 					if data == nil {
 						data = []byte{}
@@ -1211,71 +1239,58 @@ func (c *Server) serve(r fuse.Request) {
 				fuseutil.HandleRead(r, s, shandle.readData)
 				done(s)
 				r.Respond(s)
-				break
+				return nil
 			}
 			h, ok := handle.(HandleReader)
 			if !ok {
-				fmt.Printf("NO READ FOR %T\n", handle)
+				err := handleNotReaderError{handle: handle}
-				done(fuse.EIO)
+				return err
-				r.RespondError(fuse.EIO)
-				break
 			}
 			if err := h.Read(ctx, r, s); err != nil {
-				done(err)
+				return err
-				r.RespondError(err)
-				break
 			}
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.WriteRequest:
 		shandle := c.getHandle(r.Handle)
 		if shandle == nil {
-			done(fuse.ESTALE)
+			return fuse.ESTALE
-			r.RespondError(fuse.ESTALE)
-			return
 		}
 
 		s := &fuse.WriteResponse{}
 		if h, ok := shandle.handle.(HandleWriter); ok {
 			if err := h.Write(ctx, r, s); err != nil {
-				done(err)
+				return err
-				r.RespondError(err)
-				break
 			}
 			done(s)
 			r.Respond(s)
-			break
+			return nil
 		}
-		done(fuse.EIO)
+		return fuse.EIO
-		r.RespondError(fuse.EIO)
 
 	case *fuse.FlushRequest:
 		shandle := c.getHandle(r.Handle)
 		if shandle == nil {
-			done(fuse.ESTALE)
+			return fuse.ESTALE
-			r.RespondError(fuse.ESTALE)
-			return
 		}
 		handle := shandle.handle
 
 		if h, ok := handle.(HandleFlusher); ok {
 			if err := h.Flush(ctx, r); err != nil {
-				done(err)
+				return err
-				r.RespondError(err)
-				break
 			}
 		}
 		done(nil)
 		r.Respond()
+		return nil
 
 	case *fuse.ReleaseRequest:
 		shandle := c.getHandle(r.Handle)
 		if shandle == nil {
-			done(fuse.ESTALE)
+			return fuse.ESTALE
-			r.RespondError(fuse.ESTALE)
-			return
 		}
 		handle := shandle.handle
 
@@ -1284,13 +1299,12 @@ func (c *Server) serve(r fuse.Request) {
 
 		if h, ok := handle.(HandleReleaser); ok {
 			if err := h.Release(ctx, r); err != nil {
-				done(err)
+				return err
-				r.RespondError(err)
-				break
 			}
 		}
 		done(nil)
 		r.Respond()
+		return nil
 
 	case *fuse.DestroyRequest:
 		if fs, ok := c.fs.(FSDestroyer); ok {
@@ -1298,6 +1312,7 @@ func (c *Server) serve(r fuse.Request) {
 		}
 		done(nil)
 		r.Respond()
+		return nil
 
 	case *fuse.RenameRequest:
 		c.meta.Lock()
@@ -1311,63 +1326,50 @@ func (c *Server) serve(r fuse.Request) {
 				Request: r.Hdr(),
 				In:      r,
 			})
-			done(fuse.EIO)
+			return fuse.EIO
-			r.RespondError(fuse.EIO)
-			break
 		}
 		n, ok := node.(NodeRenamer)
 		if !ok {
-			done(fuse.EIO) // XXX or EPERM like Mkdir?
+			return fuse.EIO // XXX or EPERM like Mkdir?
-			r.RespondError(fuse.EIO)
-			break
 		}
 		err := n.Rename(ctx, r, newDirNode.node)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(nil)
 		r.Respond()
+		return nil
 
 	case *fuse.MknodRequest:
 		n, ok := node.(NodeMknoder)
 		if !ok {
-			done(fuse.EIO)
+			return fuse.EIO
-			r.RespondError(fuse.EIO)
-			break
 		}
 		n2, err := n.Mknod(ctx, r)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		s := &fuse.LookupResponse{}
 		initLookupResponse(s)
 		if err := c.saveLookup(ctx, s, snode, r.Name, n2); err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(s)
 		r.Respond(s)
+		return nil
 
 	case *fuse.FsyncRequest:
 		n, ok := node.(NodeFsyncer)
 		if !ok {
-			done(fuse.EIO)
+			return fuse.EIO
-			r.RespondError(fuse.EIO)
-			break
 		}
 		err := n.Fsync(ctx, r)
 		if err != nil {
-			done(err)
+			return err
-			r.RespondError(err)
-			break
 		}
 		done(nil)
 		r.Respond()
+		return nil
 
 	case *fuse.InterruptRequest:
 		c.meta.Lock()
@@ -1379,24 +1381,23 @@ func (c *Server) serve(r fuse.Request) {
 		c.meta.Unlock()
 		done(nil)
 		r.Respond()
+		return nil
 
 		/*	case *FsyncdirRequest:
-				done(ENOSYS)
+				return ENOSYS
-				r.RespondError(ENOSYS)
 
 			case *GetlkRequest, *SetlkRequest, *SetlkwRequest:
-				done(ENOSYS)
+				return ENOSYS
-				r.RespondError(ENOSYS)
 
 			case *BmapRequest:
-				done(ENOSYS)
+				return ENOSYS
-				r.RespondError(ENOSYS)
 
 			case *SetvolnameRequest, *GetxtimesRequest, *ExchangeRequest:
-				done(ENOSYS)
+				return ENOSYS
-				r.RespondError(ENOSYS)
 		*/
 	}
+
+	panic("not reached")
 }
 
 func (c *Server) saveLookup(ctx context.Context, s *fuse.LookupResponse, snode *serveNode, elem string, n2 Node) error {

vendor/src/bazil.org/fuse/fs/serve_darwin_test.go

@@ -0,0 +1,30 @@
+package fs_test
+
+import (
+	"testing"
+
+	"bazil.org/fuse/fs/fstestutil"
+	"golang.org/x/sys/unix"
+)
+
+type exchangeData struct {
+	fstestutil.File
+	// this struct cannot be zero size or multiple instances may look identical
+	_ int
+}
+
+func TestExchangeDataNotSupported(t *testing.T) {
+	t.Parallel()
+	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{&fstestutil.ChildMap{
+		"one": &exchangeData{},
+		"two": &exchangeData{},
+	}}, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mnt.Close()
+
+	if err := unix.Exchangedata(mnt.Dir+"/one", mnt.Dir+"/two", 0); err != unix.ENOTSUP {
+		t.Fatalf("expected ENOTSUP from exchangedata: %v", err)
+	}
+}

vendor/src/bazil.org/fuse/fs/serve_test.go

@@ -7,10 +7,11 @@ import (
 	"io/ioutil"
 	"log"
 	"os"
-	"os/exec"
+	"path"
 	"runtime"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"syscall"
 	"testing"
 	"time"
@@ -56,6 +57,25 @@ func (f fifo) Attr(ctx context.Context, a *fuse.Attr) error {
 	return nil
 }
 
+func TestMountpointDoesNotExist(t *testing.T) {
+	t.Parallel()
+	tmp, err := ioutil.TempDir("", "fusetest")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.Remove(tmp)
+
+	mountpoint := path.Join(tmp, "does-not-exist")
+	conn, err := fuse.Mount(mountpoint)
+	if err == nil {
+		conn.Close()
+		t.Fatalf("expected error with non-existent mountpoint")
+	}
+	if _, ok := err.(*fuse.MountpointDoesNotExistError); !ok {
+		t.Fatalf("wrong error from mount: %T: %v", err, err)
+	}
+}
+
 type badRootFS struct{}
 
 func (badRootFS) Root() (fs.Node, error) {
@@ -277,12 +297,18 @@ func (readAll) ReadAll(ctx context.Context) ([]byte, error) {
 }
 
 func testReadAll(t *testing.T, path string) {
-	data, err := ioutil.ReadFile(path)
+	f, err := os.Open(path)
 	if err != nil {
-		t.Fatalf("readAll: %v", err)
+		t.Fatal(err)
 	}
-	if string(data) != hi {
+	defer f.Close()
-		t.Errorf("readAll = %q, want %q", data, hi)
+	data := make([]byte, 4096)
+	n, err := f.Read(data)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if g, e := string(data[:n]), hi; g != e {
+		t.Errorf("readAll = %q, want %q", g, e)
 	}
 }
 
@@ -366,6 +392,15 @@ func TestReadFileFlags(t *testing.T) {
 	_ = f.Close()
 
 	want := fuse.OpenReadWrite | fuse.OpenAppend
+	if runtime.GOOS == "darwin" {
+		// OSXFUSE shares one read and one write handle for all
+		// clients, so it uses a OpenReadOnly handle for performing
+		// our read.
+		//
+		// If this test starts failing in the future, that probably
+		// means they added the feature, and we want to notice that!
+		want = fuse.OpenReadOnly
+	}
 	if g, e := r.fileFlags.Recorded().(fuse.OpenFlags), want; g != e {
 		t.Errorf("read saw file flags %+v, want %+v", g, e)
 	}
@@ -382,6 +417,13 @@ func (r *writeFlags) Attr(ctx context.Context, a *fuse.Attr) error {
 	return nil
 }
 
+func (r *writeFlags) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
+	// OSXFUSE 3.0.4 does a read-modify-write cycle even when the
+	// write was for 4096 bytes.
+	fuseutil.HandleRead(req, resp, []byte(hi))
+	return nil
+}
+
 func (r *writeFlags) Write(ctx context.Context, req *fuse.WriteRequest, resp *fuse.WriteResponse) error {
 	r.fileFlags.Record(req.FileFlags)
 	resp.Size = len(req.Data)
@@ -412,6 +454,15 @@ func TestWriteFileFlags(t *testing.T) {
 	_ = f.Close()
 
 	want := fuse.OpenReadWrite | fuse.OpenAppend
+	if runtime.GOOS == "darwin" {
+		// OSXFUSE shares one read and one write handle for all
+		// clients, so it uses a OpenWriteOnly handle for performing
+		// our read.
+		//
+		// If this test starts failing in the future, that probably
+		// means they added the feature, and we want to notice that!
+		want = fuse.OpenWriteOnly
+	}
 	if g, e := r.fileFlags.Recorded().(fuse.OpenFlags), want; g != e {
 		t.Errorf("write saw file flags %+v, want %+v", g, e)
 	}
@@ -582,7 +633,6 @@ func (f *mkdir1) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, er
 }
 
 func TestMkdir(t *testing.T) {
-	t.Parallel()
 	f := &mkdir1{}
 	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{f}, nil)
 	if err != nil {
@@ -601,6 +651,10 @@ func TestMkdir(t *testing.T) {
 	if mnt.Conn.Protocol().HasUmask() {
 		want.Umask = 0022
 	}
+	if runtime.GOOS == "darwin" {
+		// https://github.com/osxfuse/osxfuse/issues/225
+		want.Umask = 0
+	}
 	if g, e := f.RecordedMkdir(), want; g != e {
 		t.Errorf("mkdir saw %+v, want %+v", g, e)
 	}
@@ -610,6 +664,7 @@ func TestMkdir(t *testing.T) {
 
 type create1file struct {
 	fstestutil.File
+	record.Creates
 	record.Fsyncs
 }
 
@@ -623,31 +678,12 @@ func (f *create1) Create(ctx context.Context, req *fuse.CreateRequest, resp *fus
 		log.Printf("ERROR create1.Create unexpected name: %q\n", req.Name)
 		return nil, nil, fuse.EPERM
 	}
-	flags := req.Flags
 
-	// OS X does not pass O_TRUNC here, Linux does; as this is a
+	_, _, _ = f.f.Creates.Create(ctx, req, resp)
-	// Create, that's acceptable
-	flags &^= fuse.OpenTruncate
-
-	if runtime.GOOS == "linux" {
-		// Linux <3.7 accidentally leaks O_CLOEXEC through to FUSE;
-		// avoid spurious test failures
-		flags &^= fuse.OpenFlags(syscall.O_CLOEXEC)
-	}
-
-	if g, e := flags, fuse.OpenReadWrite|fuse.OpenCreate; g != e {
-		log.Printf("ERROR create1.Create unexpected flags: %v != %v\n", g, e)
-		return nil, nil, fuse.EPERM
-	}
-	if g, e := req.Mode, os.FileMode(0644); g != e {
-		log.Printf("ERROR create1.Create unexpected mode: %v != %v\n", g, e)
-		return nil, nil, fuse.EPERM
-	}
 	return &f.f, &f.f, nil
 }
 
 func TestCreate(t *testing.T) {
-	t.Parallel()
 	f := &create1{}
 	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{f}, nil)
 	if err != nil {
@@ -658,12 +694,38 @@ func TestCreate(t *testing.T) {
 	// uniform umask needed to make os.Create's 0666 into something
 	// reproducible
 	defer syscall.Umask(syscall.Umask(0022))
-	ff, err := os.Create(mnt.Dir + "/foo")
+	ff, err := os.OpenFile(mnt.Dir+"/foo", os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0640)
 	if err != nil {
 		t.Fatalf("create1 WriteFile: %v", err)
 	}
 	defer ff.Close()
 
+	want := fuse.CreateRequest{
+		Name:  "foo",
+		Flags: fuse.OpenReadWrite | fuse.OpenCreate | fuse.OpenTruncate,
+		Mode:  0640,
+	}
+	if mnt.Conn.Protocol().HasUmask() {
+		want.Umask = 0022
+	}
+	if runtime.GOOS == "darwin" {
+		// OS X does not pass O_TRUNC here, Linux does; as this is a
+		// Create, that's acceptable
+		want.Flags &^= fuse.OpenTruncate
+
+		// https://github.com/osxfuse/osxfuse/issues/225
+		want.Umask = 0
+	}
+	got := f.f.RecordedCreate()
+	if runtime.GOOS == "linux" {
+		// Linux <3.7 accidentally leaks O_CLOEXEC through to FUSE;
+		// avoid spurious test failures
+		got.Flags &^= fuse.OpenFlags(syscall.O_CLOEXEC)
+	}
+	if g, e := got, want; g != e {
+		t.Fatalf("create saw %+v, want %+v", g, e)
+	}
+
 	err = syscall.Fsync(int(ff.Fd()))
 	if err != nil {
 		t.Fatalf("Fsync = %v", err)
@@ -895,7 +957,6 @@ func (f *mknod1) Mknod(ctx context.Context, r *fuse.MknodRequest) (fs.Node, erro
 }
 
 func TestMknod(t *testing.T) {
-	t.Parallel()
 	if os.Getuid() != 0 {
 		t.Skip("skipping unless root")
 	}
@@ -907,15 +968,15 @@ func TestMknod(t *testing.T) {
 	}
 	defer mnt.Close()
 
-	defer syscall.Umask(syscall.Umask(0))
+	defer syscall.Umask(syscall.Umask(0022))
-	err = syscall.Mknod(mnt.Dir+"/node", syscall.S_IFIFO|0666, 123)
+	err = syscall.Mknod(mnt.Dir+"/node", syscall.S_IFIFO|0660, 123)
 	if err != nil {
-		t.Fatalf("Mknod: %v", err)
+		t.Fatalf("mknod: %v", err)
 	}
 
 	want := fuse.MknodRequest{
 		Name: "node",
-		Mode: os.FileMode(os.ModeNamedPipe | 0666),
+		Mode: os.FileMode(os.ModeNamedPipe | 0640),
 		Rdev: uint32(123),
 	}
 	if runtime.GOOS == "linux" {
@@ -924,6 +985,13 @@ func TestMknod(t *testing.T) {
 		// bit is portable.)
 		want.Rdev = 0
 	}
+	if mnt.Conn.Protocol().HasUmask() {
+		want.Umask = 0022
+	}
+	if runtime.GOOS == "darwin" {
+		// https://github.com/osxfuse/osxfuse/issues/225
+		want.Umask = 0
+	}
 	if g, e := f.RecordedMknod(), want; g != e {
 		t.Fatalf("mknod saw %+v, want %+v", g, e)
 	}
@@ -985,7 +1053,38 @@ func (it *interrupt) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse
 	default:
 	}
 	<-ctx.Done()
-	return fuse.EINTR
+	return ctx.Err()
+}
+
+func helperInterrupt() {
+	log.SetPrefix("interrupt child: ")
+	log.SetFlags(0)
+
+	log.Printf("starting...")
+
+	f, err := os.Open("child")
+	if err != nil {
+		log.Fatalf("cannot open file: %v", err)
+	}
+	defer f.Close()
+
+	log.Printf("reading...")
+	buf := make([]byte, 4096)
+	n, err := syscall.Read(int(f.Fd()), buf)
+	switch err {
+	case nil:
+		log.Fatalf("read: expected error, got data: %q", buf[:n])
+	case syscall.EINTR:
+		log.Printf("read: saw EINTR, all good")
+	default:
+		log.Fatalf("read: wrong error: %v", err)
+	}
+
+	log.Printf("exiting...")
+}
+
+func init() {
+	childHelpers["interrupt"] = helperInterrupt
 }
 
 func TestInterrupt(t *testing.T) {
@@ -999,46 +1098,71 @@ func TestInterrupt(t *testing.T) {
 	defer mnt.Close()
 
 	// start a subprocess that can hang until signaled
-	cmd := exec.Command("cat", mnt.Dir+"/child")
+	child, err := childCmd("interrupt")
-
-	err = cmd.Start()
 	if err != nil {
-		t.Errorf("interrupt: cannot start cat: %v", err)
+		t.Fatal(err)
+	}
+	child.Dir = mnt.Dir
+
+	if err := child.Start(); err != nil {
+		t.Errorf("cannot start child: %v", err)
 		return
 	}
 
 	// try to clean up if child is still alive when returning
-	defer cmd.Process.Kill()
+	defer child.Process.Kill()
 
 	// wait till we're sure it's hanging in read
 	<-f.hanging
 
-	err = cmd.Process.Signal(os.Interrupt)
+	//	err = child.Process.Signal(os.Interrupt)
+	var sig os.Signal = syscall.SIGIO
+	if runtime.GOOS == "darwin" {
+		// I can't get OSXFUSE 3.2.0 to trigger EINTR return from
+		// read(2), at least in a Go application. Works on Linux. So,
+		// on OS X, we just check that the signal at least kills the
+		// child, aborting the read, so operations on hanging FUSE
+		// filesystems can be aborted.
+		sig = os.Interrupt
+	}
+
+	err = child.Process.Signal(sig)
 	if err != nil {
-		t.Errorf("interrupt: cannot interrupt cat: %v", err)
+		t.Errorf("cannot interrupt child: %v", err)
 		return
 	}
 
-	p, err := cmd.Process.Wait()
+	p, err := child.Process.Wait()
 	if err != nil {
-		t.Errorf("interrupt: cat bork: %v", err)
+		t.Errorf("child failed: %v", err)
 		return
 	}
 	switch ws := p.Sys().(type) {
 	case syscall.WaitStatus:
 		if ws.CoreDump() {
-			t.Errorf("interrupt: didn't expect cat to dump core: %v", ws)
+			t.Fatalf("interrupt: didn't expect child to dump core: %v", ws)
 		}
-
+		switch runtime.GOOS {
+		case "darwin":
+			// see comment above about EINTR on OS X
 			if ws.Exited() {
-			t.Errorf("interrupt: didn't expect cat to exit normally: %v", ws)
+				t.Fatalf("interrupt: expected child to die from signal, got exit status: %v", ws.ExitStatus())
 			}
-
 			if !ws.Signaled() {
-			t.Errorf("interrupt: expected cat to get a signal: %v", ws)
+				t.Fatalf("interrupt: expected child to die from signal: %v", ws)
-		} else {
+			}
-			if ws.Signal() != os.Interrupt {
+			if got := ws.Signal(); got != sig {
-				t.Errorf("interrupt: cat got wrong signal: %v", ws)
+				t.Errorf("interrupt: child failed: signal %d", got)
+			}
+		default:
+			if ws.Signaled() {
+				t.Fatalf("interrupt: didn't expect child to exit with a signal: %v", ws)
+			}
+			if !ws.Exited() {
+				t.Fatalf("interrupt: expected child to exit normally: %v", ws)
+			}
+			if status := ws.ExitStatus(); status != 0 {
+				t.Errorf("interrupt: child failed: exit status %d", status)
 			}
 		}
 	default:
@@ -1046,6 +1170,51 @@ func TestInterrupt(t *testing.T) {
 	}
 }
 
+// Test deadline
+
+type deadline struct {
+	fstestutil.File
+}
+
+var _ fs.NodeOpener = (*deadline)(nil)
+
+func (it *deadline) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) {
+	<-ctx.Done()
+	return nil, ctx.Err()
+}
+
+func TestDeadline(t *testing.T) {
+	t.Parallel()
+	child := &deadline{}
+	config := &fs.Config{
+		WithContext: func(ctx context.Context, req fuse.Request) context.Context {
+			// return a context that has already deadlined
+
+			// Server.serve will cancel the parent context, which will
+			// cancel this one, so discarding cancel here should be
+			// safe.
+			ctx, _ = context.WithDeadline(ctx, time.Unix(0, 0))
+			return ctx
+		},
+	}
+	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{&fstestutil.ChildMap{"child": child}}, config)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mnt.Close()
+
+	f, err := os.Open(mnt.Dir + "/child")
+	if err == nil {
+		f.Close()
+	}
+
+	// not caused by signal -> should not get EINTR;
+	// context.DeadlineExceeded will be translated into EIO
+	if nerr, ok := err.(*os.PathError); !ok || nerr.Err != syscall.EIO {
+		t.Fatalf("wrong error from deadline open: %T: %v", err, err)
+	}
+}
+
 // Test truncate
 
 type truncate struct {
@@ -1224,6 +1393,58 @@ func TestReadDirAll(t *testing.T) {
 	}
 }
 
+type readDirAllBad struct {
+	fstestutil.Dir
+}
+
+func (d *readDirAllBad) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
+	r := []fuse.Dirent{
+		{Name: "one", Inode: 11, Type: fuse.DT_Dir},
+		{Name: "three", Inode: 13},
+		{Name: "two", Inode: 12, Type: fuse.DT_File},
+	}
+	// pick a really distinct error, to identify it later
+	return r, fuse.Errno(syscall.ENAMETOOLONG)
+}
+
+func TestReadDirAllBad(t *testing.T) {
+	t.Parallel()
+	f := &readDirAllBad{}
+	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{f}, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mnt.Close()
+
+	fil, err := os.Open(mnt.Dir)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	defer fil.Close()
+
+	var names []string
+	for {
+		n, err := fil.Readdirnames(1)
+		if err != nil {
+			if nerr, ok := err.(*os.SyscallError); !ok || nerr.Err != syscall.ENAMETOOLONG {
+				t.Fatalf("wrong error: %v", err)
+			}
+			break
+		}
+		names = append(names, n...)
+	}
+
+	t.Logf("Got readdir: %q", names)
+
+	// TODO could serve partial results from ReadDirAll but the
+	// shandle.readData mechanism makes that awkward.
+	if len(names) != 0 {
+		t.Errorf(`expected 0 entries, got: %q`, names)
+		return
+	}
+}
+
 // Test readdir without any ReadDir methods implemented.
 
 type readDirNotImplemented struct {
@@ -1255,6 +1476,73 @@ func TestReadDirNotImplemented(t *testing.T) {
 	}
 }
 
+type readDirAllRewind struct {
+	fstestutil.Dir
+	entries atomic.Value
+}
+
+func (d *readDirAllRewind) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
+	entries := d.entries.Load().([]fuse.Dirent)
+	return entries, nil
+}
+
+func TestReadDirAllRewind(t *testing.T) {
+	t.Parallel()
+	f := &readDirAllRewind{}
+	f.entries.Store([]fuse.Dirent{
+		{Name: "one", Inode: 11, Type: fuse.DT_Dir},
+	})
+	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{f}, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mnt.Close()
+
+	fil, err := os.Open(mnt.Dir)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	defer fil.Close()
+
+	{
+		names, err := fil.Readdirnames(100)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+		t.Logf("Got readdir: %q", names)
+		if len(names) != 1 ||
+			names[0] != "one" {
+			t.Errorf(`expected  entry of "one", got: %q`, names)
+			return
+		}
+	}
+
+	f.entries.Store([]fuse.Dirent{
+		{Name: "two", Inode: 12, Type: fuse.DT_File},
+		{Name: "one", Inode: 11, Type: fuse.DT_Dir},
+	})
+	if _, err := fil.Seek(0, os.SEEK_SET); err != nil {
+		t.Fatal(err)
+	}
+
+	{
+		names, err := fil.Readdirnames(100)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+		t.Logf("Got readdir: %q", names)
+		if len(names) != 2 ||
+			names[0] != "two" ||
+			names[1] != "one" {
+			t.Errorf(`expected 2 entries of "two", "one", got: %q`, names)
+			return
+		}
+	}
+}
+
 // Test Chmod.
 
 type chmod struct {
@@ -1364,6 +1652,10 @@ func (f *openNonSeekable) Open(ctx context.Context, req *fuse.OpenRequest, resp
 }
 
 func TestOpenNonSeekable(t *testing.T) {
+	if runtime.GOOS == "darwin" {
+		t.Skip("OSXFUSE shares one read and one write handle for all clients, does not support open modes")
+	}
+
 	t.Parallel()
 	f := &openNonSeekable{}
 	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{&fstestutil.ChildMap{"child": f}}, nil)
@@ -2109,8 +2401,20 @@ func TestInvalidateNodeAttr(t *testing.T) {
 			t.Fatalf("stat error: %v", err)
 		}
 	}
-	if g, e := a.attr.Count(), uint32(1); g != e {
+	// With OSXFUSE 3.0.4, we seem to see typically two Attr calls by
-		t.Errorf("wrong Attr call count: %d != %d", g, e)
+	// this point; something not populating the in-kernel cache
+	// properly? Cope with it; we care more about seeing a new Attr
+	// call after the invalidation.
+	//
+	// We still enforce a max number here so that we know that the
+	// invalidate actually did something, and it's not just that every
+	// Stat results in an Attr.
+	before := a.attr.Count()
+	if before == 0 {
+		t.Error("no Attr call seen")
+	}
+	if g, e := before, uint32(3); g > e {
+		t.Errorf("too many Attr calls seen: %d > %d", g, e)
 	}
 
 	t.Logf("invalidating...")
@@ -2123,7 +2427,7 @@ func TestInvalidateNodeAttr(t *testing.T) {
 			t.Fatalf("stat error: %v", err)
 		}
 	}
-	if g, e := a.attr.Count(), uint32(2); g != e {
+	if g, e := a.attr.Count(), before+1; g != e {
 		t.Errorf("wrong Attr call count: %d != %d", g, e)
 	}
 }
@@ -2133,9 +2437,13 @@ type invalidateData struct {
 	t    testing.TB
 	attr record.Counter
 	read record.Counter
+	data atomic.Value
 }
 
-const invalidateDataContent = "hello, world\n"
+const (
+	invalidateDataContent1 = "hello, world\n"
+	invalidateDataContent2 = "so long!\n"
+)
 
 var _ fs.Node = (*invalidateData)(nil)
 
@@ -2143,7 +2451,7 @@ func (i *invalidateData) Attr(ctx context.Context, a *fuse.Attr) error {
 	i.attr.Inc()
 	i.t.Logf("Attr called, #%d", i.attr.Count())
 	a.Mode = 0600
-	a.Size = uint64(len(invalidateDataContent))
+	a.Size = uint64(len(i.data.Load().(string)))
 	return nil
 }
 
@@ -2152,17 +2460,18 @@ var _ fs.HandleReader = (*invalidateData)(nil)
 func (i *invalidateData) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
 	i.read.Inc()
 	i.t.Logf("Read called, #%d", i.read.Count())
-	fuseutil.HandleRead(req, resp, []byte(invalidateDataContent))
+	fuseutil.HandleRead(req, resp, []byte(i.data.Load().(string)))
 	return nil
 }
 
-func TestInvalidateNodeData(t *testing.T) {
+func TestInvalidateNodeDataInvalidatesAttr(t *testing.T) {
 	// This test may see false positive failures when run under
 	// extreme memory pressure.
 	t.Parallel()
 	a := &invalidateData{
 		t: t,
 	}
+	a.data.Store(invalidateDataContent1)
 	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{&fstestutil.ChildMap{"child": a}}, nil)
 	if err != nil {
 		t.Fatal(err)
@@ -2179,31 +2488,93 @@ func TestInvalidateNodeData(t *testing.T) {
 	}
 	defer f.Close()
 
-	buf := make([]byte, 4)
+	attrBefore := a.attr.Count()
+	if g, min := attrBefore, uint32(1); g < min {
+		t.Errorf("wrong Attr call count: %d < %d", g, min)
+	}
+
+	t.Logf("invalidating...")
+	a.data.Store(invalidateDataContent2)
+	if err := mnt.Server.InvalidateNodeData(a); err != nil {
+		t.Fatalf("invalidate error: %v", err)
+	}
+
+	// on OSXFUSE 3.0.6, the Attr has already triggered here, so don't
+	// check the count at this point
+
+	if _, err := f.Stat(); err != nil {
+		t.Errorf("stat error: %v", err)
+	}
+	if g, prev := a.attr.Count(), attrBefore; g <= prev {
+		t.Errorf("did not see Attr call after invalidate: %d <= %d", g, prev)
+	}
+}
+
+func TestInvalidateNodeDataInvalidatesData(t *testing.T) {
+	// This test may see false positive failures when run under
+	// extreme memory pressure.
+	t.Parallel()
+	a := &invalidateData{
+		t: t,
+	}
+	a.data.Store(invalidateDataContent1)
+	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{&fstestutil.ChildMap{"child": a}}, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mnt.Close()
+
+	if !mnt.Conn.Protocol().HasInvalidate() {
+		t.Skip("Old FUSE protocol")
+	}
+
+	f, err := os.Open(mnt.Dir + "/child")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+
+	{
+		buf := make([]byte, 100)
 		for i := 0; i < 10; i++ {
-		if _, err := f.ReadAt(buf, 0); err != nil {
+			n, err := f.ReadAt(buf, 0)
+			if err != nil && err != io.EOF {
 				t.Fatalf("readat error: %v", err)
 			}
+			if g, e := string(buf[:n]), invalidateDataContent1; g != e {
+				t.Errorf("wrong content: %q != %q", g, e)
+			}
 		}
-	if g, e := a.attr.Count(), uint32(1); g != e {
-		t.Errorf("wrong Attr call count: %d != %d", g, e)
 	}
 	if g, e := a.read.Count(), uint32(1); g != e {
 		t.Errorf("wrong Read call count: %d != %d", g, e)
 	}
 
 	t.Logf("invalidating...")
+	a.data.Store(invalidateDataContent2)
 	if err := mnt.Server.InvalidateNodeData(a); err != nil {
 		t.Fatalf("invalidate error: %v", err)
 	}
 
+	if g, e := a.read.Count(), uint32(1); g != e {
+		t.Errorf("wrong Read call count: %d != %d", g, e)
+	}
+
+	{
+		// explicitly don't cross the EOF, to trigger more edge cases
+		// (Linux will always do Getattr if you cross what it believes
+		// the EOF to be)
+		const bufSize = len(invalidateDataContent2) - 3
+		buf := make([]byte, bufSize)
 		for i := 0; i < 10; i++ {
-		if _, err := f.ReadAt(buf, 0); err != nil {
+			n, err := f.ReadAt(buf, 0)
+			if err != nil && err != io.EOF {
 				t.Fatalf("readat error: %v", err)
 			}
+			if g, e := string(buf[:n]), invalidateDataContent2[:bufSize]; g != e {
+				t.Errorf("wrong content: %q != %q", g, e)
+			}
 		}
-	if g, e := a.attr.Count(), uint32(1); g != e {
-		t.Errorf("wrong Attr call count: %d != %d", g, e)
 	}
 	if g, e := a.read.Count(), uint32(2); g != e {
 		t.Errorf("wrong Read call count: %d != %d", g, e)
@@ -2238,7 +2609,7 @@ func (i *invalidateDataPartial) Read(ctx context.Context, req *fuse.ReadRequest,
 	return nil
 }
 
-func TestInvalidateNodeDataRange(t *testing.T) {
+func TestInvalidateNodeDataRangeMiss(t *testing.T) {
 	// This test may see false positive failures when run under
 	// extreme memory pressure.
 	t.Parallel()
@@ -2267,14 +2638,11 @@ func TestInvalidateNodeDataRange(t *testing.T) {
 			t.Fatalf("readat error: %v", err)
 		}
 	}
-	if g, e := a.attr.Count(), uint32(1); g != e {
-		t.Errorf("wrong Attr call count: %d != %d", g, e)
-	}
 	if g, e := a.read.Count(), uint32(1); g != e {
 		t.Errorf("wrong Read call count: %d != %d", g, e)
 	}
 
-	t.Logf("invalidating...")
+	t.Logf("invalidating an uninteresting block...")
 	if err := mnt.Server.InvalidateNodeDataRange(a, 4096, 4096); err != nil {
 		t.Fatalf("invalidate error: %v", err)
 	}
@@ -2284,9 +2652,6 @@ func TestInvalidateNodeDataRange(t *testing.T) {
 			t.Fatalf("readat error: %v", err)
 		}
 	}
-	if g, e := a.attr.Count(), uint32(1); g != e {
-		t.Errorf("wrong Attr call count: %d != %d", g, e)
-	}
 	// The page invalidated is not the page we're reading, so it
 	// should stay in cache.
 	if g, e := a.read.Count(), uint32(1); g != e {
@@ -2294,6 +2659,56 @@ func TestInvalidateNodeDataRange(t *testing.T) {
 	}
 }
 
+func TestInvalidateNodeDataRangeHit(t *testing.T) {
+	// This test may see false positive failures when run under
+	// extreme memory pressure.
+	t.Parallel()
+	a := &invalidateDataPartial{
+		t: t,
+	}
+	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{&fstestutil.ChildMap{"child": a}}, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mnt.Close()
+
+	if !mnt.Conn.Protocol().HasInvalidate() {
+		t.Skip("Old FUSE protocol")
+	}
+
+	f, err := os.Open(mnt.Dir + "/child")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+
+	const offset = 4096
+	buf := make([]byte, 4)
+	for i := 0; i < 10; i++ {
+		if _, err := f.ReadAt(buf, offset); err != nil {
+			t.Fatalf("readat error: %v", err)
+		}
+	}
+	if g, e := a.read.Count(), uint32(1); g != e {
+		t.Errorf("wrong Read call count: %d != %d", g, e)
+	}
+
+	t.Logf("invalidating where the reads are...")
+	if err := mnt.Server.InvalidateNodeDataRange(a, offset, 4096); err != nil {
+		t.Fatalf("invalidate error: %v", err)
+	}
+
+	for i := 0; i < 10; i++ {
+		if _, err := f.ReadAt(buf, offset); err != nil {
+			t.Fatalf("readat error: %v", err)
+		}
+	}
+	// One new read
+	if g, e := a.read.Count(), uint32(2); g != e {
+		t.Errorf("wrong Read call count: %d != %d", g, e)
+	}
+}
+
 type invalidateEntryRoot struct {
 	fs.NodeRef
 	t      testing.TB
@@ -2380,13 +2795,13 @@ func (contextFile) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.O
 
 func TestContext(t *testing.T) {
 	t.Parallel()
-	ctx := context.Background()
 	const input = "kilroy was here"
-	ctx = context.WithValue(ctx, &contextFileSentinel, input)
 	mnt, err := fstestutil.MountedT(t,
 		fstestutil.SimpleFS{&fstestutil.ChildMap{"child": contextFile{}}},
 		&fs.Config{
-			GetContext: func() context.Context { return ctx },
+			WithContext: func(ctx context.Context, req fuse.Request) context.Context {
+				return context.WithValue(ctx, &contextFileSentinel, input)
+			},
 		})
 	if err != nil {
 		t.Fatal(err)
@@ -2401,3 +2816,28 @@ func TestContext(t *testing.T) {
 		t.Errorf("read wrong data: %q != %q", g, e)
 	}
 }
+
+type goexitFile struct {
+	fstestutil.File
+}
+
+func (goexitFile) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) {
+	log.Println("calling runtime.Goexit...")
+	runtime.Goexit()
+	panic("not reached")
+}
+
+func TestGoexit(t *testing.T) {
+	t.Parallel()
+	mnt, err := fstestutil.MountedT(t,
+		fstestutil.SimpleFS{&fstestutil.ChildMap{"child": goexitFile{}}}, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mnt.Close()
+
+	_, err = ioutil.ReadFile(mnt.Dir + "/child")
+	if nerr, ok := err.(*os.PathError); !ok || nerr.Err != syscall.EIO {
+		t.Fatalf("wrong error from exiting handler: %T: %v", err, err)
+	}
+}

vendor/src/bazil.org/fuse/fuse.go

@@ -132,6 +132,18 @@ type Conn struct {
 	proto Protocol
 }
 
+// MountpointDoesNotExistError is an error returned when the
+// mountpoint does not exist.
+type MountpointDoesNotExistError struct {
+	Path string
+}
+
+var _ error = (*MountpointDoesNotExistError)(nil)
+
+func (e *MountpointDoesNotExistError) Error() string {
+	return fmt.Sprintf("mountpoint does not exist: %v", e.Path)
+}
+
 // Mount mounts a new FUSE connection on the named directory
 // and returns a connection for reading and writing FUSE messages.
 //
@@ -164,6 +176,13 @@ func Mount(dir string, options ...MountOption) (*Conn, error) {
 
 	if err := initMount(c, &conf); err != nil {
 		c.Close()
+		if err == ErrClosedWithoutInit {
+			// see if we can provide a better error
+			<-c.Ready
+			if err := c.MountError; err != nil {
+				return nil, err
+			}
+		}
 		return nil, err
 	}
 
@@ -179,11 +198,15 @@ func (e *OldVersionError) Error() string {
 	return fmt.Sprintf("kernel FUSE version is too old: %v < %v", e.Kernel, e.LibraryMin)
 }
 
+var (
+	ErrClosedWithoutInit = errors.New("fuse connection closed without init")
+)
+
 func initMount(c *Conn, conf *mountConfig) error {
 	req, err := c.ReadRequest()
 	if err != nil {
 		if err == io.EOF {
-			return fmt.Errorf("missing init, got EOF")
+			return ErrClosedWithoutInit
 		}
 		return err
 	}
@@ -212,7 +235,7 @@ func initMount(c *Conn, conf *mountConfig) error {
 	s := &InitResponse{
 		Library:      proto,
 		MaxReadahead: conf.maxReadahead,
-		MaxWrite:     128 * 1024,
+		MaxWrite:     maxWrite,
 		Flags:        InitBigWrites | conf.initFlags,
 	}
 	r.Respond(s)
@@ -235,15 +258,27 @@ type Request interface {
 // A RequestID identifies an active FUSE request.
 type RequestID uint64
 
+func (r RequestID) String() string {
+	return fmt.Sprintf("%#x", uint64(r))
+}
+
 // A NodeID is a number identifying a directory or file.
 // It must be unique among IDs returned in LookupResponses
 // that have not yet been forgotten by ForgetRequests.
 type NodeID uint64
 
+func (n NodeID) String() string {
+	return fmt.Sprintf("%#x", uint64(n))
+}
+
 // A HandleID is a number identifying an open directory or file.
 // It only needs to be unique while the directory or file is open.
 type HandleID uint64
 
+func (h HandleID) String() string {
+	return fmt.Sprintf("%#x", uint64(h))
+}
+
 // The RootID identifies the root directory of a FUSE file system.
 const RootID NodeID = rootID
 
@@ -261,7 +296,7 @@ type Header struct {
 }
 
 func (h *Header) String() string {
-	return fmt.Sprintf("ID=%#x Node=%#x Uid=%d Gid=%d Pid=%d", h.ID, h.Node, h.Uid, h.Gid, h.Pid)
+	return fmt.Sprintf("ID=%v Node=%v Uid=%d Gid=%d Pid=%d", h.ID, h.Node, h.Uid, h.Gid, h.Pid)
 }
 
 func (h *Header) Hdr() *Header {
@@ -368,9 +403,6 @@ func (h *Header) RespondError(err error) {
 	h.respond(buf)
 }
 
-// Maximum file write size we are prepared to receive from the kernel.
-const maxWrite = 16 * 1024 * 1024
-
 // All requests read from the kernel, without data, are shorter than
 // this.
 var maxRequestSize = syscall.Getpagesize()
@@ -985,7 +1017,33 @@ loop:
 	case opGetxtimes:
 		panic("opGetxtimes")
 	case opExchange:
-		panic("opExchange")
+		in := (*exchangeIn)(m.data())
+		if m.len() < unsafe.Sizeof(*in) {
+			goto corrupt
+		}
+		oldDirNodeID := NodeID(in.Olddir)
+		newDirNodeID := NodeID(in.Newdir)
+		oldNew := m.bytes()[unsafe.Sizeof(*in):]
+		// oldNew should be "oldname\x00newname\x00"
+		if len(oldNew) < 4 {
+			goto corrupt
+		}
+		if oldNew[len(oldNew)-1] != '\x00' {
+			goto corrupt
+		}
+		i := bytes.IndexByte(oldNew, '\x00')
+		if i < 0 {
+			goto corrupt
+		}
+		oldName, newName := string(oldNew[:i]), string(oldNew[i+1:len(oldNew)-1])
+		req = &ExchangeDataRequest{
+			Header:  m.Header(),
+			OldDir:  oldDirNodeID,
+			NewDir:  newDirNodeID,
+			OldName: oldName,
+			NewName: newName,
+			// TODO options
+		}
 	}
 
 	return req, nil
@@ -1147,7 +1205,7 @@ type InitRequest struct {
 var _ = Request(&InitRequest{})
 
 func (r *InitRequest) String() string {
-	return fmt.Sprintf("Init [%s] %v ra=%d fl=%v", &r.Header, r.Kernel, r.MaxReadahead, r.Flags)
+	return fmt.Sprintf("Init [%v] %v ra=%d fl=%v", &r.Header, r.Kernel, r.MaxReadahead, r.Flags)
 }
 
 // An InitResponse is the response to an InitRequest.
@@ -1163,7 +1221,7 @@ type InitResponse struct {
 }
 
 func (r *InitResponse) String() string {
-	return fmt.Sprintf("Init %+v", *r)
+	return fmt.Sprintf("Init %v ra=%d fl=%v w=%d", r.Library, r.MaxReadahead, r.Flags, r.MaxWrite)
 }
 
 // Respond replies to the request with the given response.
@@ -1224,7 +1282,13 @@ type StatfsResponse struct {
 }
 
 func (r *StatfsResponse) String() string {
-	return fmt.Sprintf("Statfs %+v", *r)
+	return fmt.Sprintf("Statfs blocks=%d/%d/%d files=%d/%d bsize=%d frsize=%d namelen=%d",
+		r.Bavail, r.Bfree, r.Blocks,
+		r.Ffree, r.Files,
+		r.Bsize,
+		r.Frsize,
+		r.Namelen,
+	)
 }
 
 // An AccessRequest asks whether the file can be accessed
@@ -1259,7 +1323,7 @@ type Attr struct {
 	Ctime     time.Time   // time of last inode change
 	Crtime    time.Time   // time of creation (OS X only)
 	Mode      os.FileMode // file mode
-	Nlink     uint32      // number of links
+	Nlink     uint32      // number of links (usually 1)
 	Uid       uint32      // owner uid
 	Gid       uint32      // group gid
 	Rdev      uint32      // device numbers
@@ -1267,6 +1331,10 @@ type Attr struct {
 	BlockSize uint32      // preferred blocksize for filesystem I/O
 }
 
+func (a Attr) String() string {
+	return fmt.Sprintf("valid=%v ino=%v size=%d mode=%v", a.Valid, a.Inode, a.Size, a.Mode)
+}
+
 func unix(t time.Time) (sec uint64, nsec uint32) {
 	nano := t.UnixNano()
 	sec = uint64(nano / 1e9)
@@ -1329,7 +1397,7 @@ type GetattrRequest struct {
 var _ = Request(&GetattrRequest{})
 
 func (r *GetattrRequest) String() string {
-	return fmt.Sprintf("Getattr [%s] %#x fl=%v", &r.Header, r.Handle, r.Flags)
+	return fmt.Sprintf("Getattr [%s] %v fl=%v", &r.Header, r.Handle, r.Flags)
 }
 
 // Respond replies to the request with the given response.
@@ -1349,7 +1417,7 @@ type GetattrResponse struct {
 }
 
 func (r *GetattrResponse) String() string {
-	return fmt.Sprintf("Getattr %+v", *r)
+	return fmt.Sprintf("Getattr %v", r.Attr)
 }
 
 // A GetxattrRequest asks for the extended attributes associated with r.Node.
@@ -1540,8 +1608,12 @@ type LookupResponse struct {
 	Attr       Attr
 }
 
+func (r *LookupResponse) string() string {
+	return fmt.Sprintf("%v gen=%d valid=%v attr={%v}", r.Node, r.Generation, r.EntryValid, r.Attr)
+}
+
 func (r *LookupResponse) String() string {
-	return fmt.Sprintf("Lookup %+v", *r)
+	return fmt.Sprintf("Lookup %s", r.string())
 }
 
 // An OpenRequest asks to open a file or directory
@@ -1572,8 +1644,12 @@ type OpenResponse struct {
 	Flags  OpenResponseFlags
 }
 
+func (r *OpenResponse) string() string {
+	return fmt.Sprintf("%v fl=%v", r.Handle, r.Flags)
+}
+
 func (r *OpenResponse) String() string {
-	return fmt.Sprintf("Open %+v", *r)
+	return fmt.Sprintf("Open %s", r.string())
 }
 
 // A CreateRequest asks to create and open a file (not a directory).
@@ -1582,6 +1658,7 @@ type CreateRequest struct {
 	Name   string
 	Flags  OpenFlags
 	Mode   os.FileMode
+	// Umask of the request. Not supported on OS X.
 	Umask os.FileMode
 }
 
@@ -1620,7 +1697,7 @@ type CreateResponse struct {
 }
 
 func (r *CreateResponse) String() string {
-	return fmt.Sprintf("Create %+v", *r)
+	return fmt.Sprintf("Create {%s} {%s}", r.LookupResponse.string(), r.OpenResponse.string())
 }
 
 // A MkdirRequest asks to create (but not open) a directory.
@@ -1628,6 +1705,7 @@ type MkdirRequest struct {
 	Header `json:"-"`
 	Name   string
 	Mode   os.FileMode
+	// Umask of the request. Not supported on OS X.
 	Umask os.FileMode
 }
 
@@ -1658,7 +1736,7 @@ type MkdirResponse struct {
 }
 
 func (r *MkdirResponse) String() string {
-	return fmt.Sprintf("Mkdir %+v", *r)
+	return fmt.Sprintf("Mkdir %v", r.LookupResponse.string())
 }
 
 // A ReadRequest asks to read from an open file.
@@ -1676,7 +1754,7 @@ type ReadRequest struct {
 var _ = Request(&ReadRequest{})
 
 func (r *ReadRequest) String() string {
-	return fmt.Sprintf("Read [%s] %#x %d @%#x dir=%v fl=%v lock=%d ffl=%v", &r.Header, r.Handle, r.Size, r.Offset, r.Dir, r.Flags, r.LockOwner, r.FileFlags)
+	return fmt.Sprintf("Read [%s] %v %d @%#x dir=%v fl=%v lock=%d ffl=%v", &r.Header, r.Handle, r.Size, r.Offset, r.Dir, r.Flags, r.LockOwner, r.FileFlags)
 }
 
 // Respond replies to the request with the given response.
@@ -1719,7 +1797,7 @@ type ReleaseRequest struct {
 var _ = Request(&ReleaseRequest{})
 
 func (r *ReleaseRequest) String() string {
-	return fmt.Sprintf("Release [%s] %#x fl=%v rfl=%v owner=%#x", &r.Header, r.Handle, r.Flags, r.ReleaseFlags, r.LockOwner)
+	return fmt.Sprintf("Release [%s] %v fl=%v rfl=%v owner=%#x", &r.Header, r.Handle, r.Flags, r.ReleaseFlags, r.LockOwner)
 }
 
 // Respond replies to the request, indicating that the handle has been released.
@@ -1861,7 +1939,7 @@ type WriteRequest struct {
 var _ = Request(&WriteRequest{})
 
 func (r *WriteRequest) String() string {
-	return fmt.Sprintf("Write [%s] %#x %d @%d fl=%v lock=%d ffl=%v", &r.Header, r.Handle, len(r.Data), r.Offset, r.Flags, r.LockOwner, r.FileFlags)
+	return fmt.Sprintf("Write [%s] %v %d @%d fl=%v lock=%d ffl=%v", &r.Header, r.Handle, len(r.Data), r.Offset, r.Flags, r.LockOwner, r.FileFlags)
 }
 
 type jsonWriteRequest struct {
@@ -1895,7 +1973,7 @@ type WriteResponse struct {
 }
 
 func (r *WriteResponse) String() string {
-	return fmt.Sprintf("Write %+v", *r)
+	return fmt.Sprintf("Write %d", r.Size)
 }
 
 // A SetattrRequest asks to change one or more attributes associated with a file,
@@ -1948,9 +2026,9 @@ func (r *SetattrRequest) String() string {
 		fmt.Fprintf(&buf, " mtime=now")
 	}
 	if r.Valid.Handle() {
-		fmt.Fprintf(&buf, " handle=%#x", r.Handle)
+		fmt.Fprintf(&buf, " handle=%v", r.Handle)
 	} else {
-		fmt.Fprintf(&buf, " handle=INVALID-%#x", r.Handle)
+		fmt.Fprintf(&buf, " handle=INVALID-%v", r.Handle)
 	}
 	if r.Valid.LockOwner() {
 		fmt.Fprintf(&buf, " lockowner")
@@ -1965,7 +2043,7 @@ func (r *SetattrRequest) String() string {
 		fmt.Fprintf(&buf, " bkuptime=%v", r.Bkuptime)
 	}
 	if r.Valid.Flags() {
-		fmt.Fprintf(&buf, " flags=%#x", r.Flags)
+		fmt.Fprintf(&buf, " flags=%v", r.Flags)
 	}
 	return buf.String()
 }
@@ -1988,7 +2066,7 @@ type SetattrResponse struct {
 }
 
 func (r *SetattrResponse) String() string {
-	return fmt.Sprintf("Setattr %+v", *r)
+	return fmt.Sprintf("Setattr %v", r.Attr)
 }
 
 // A FlushRequest asks for the current state of an open file to be flushed
@@ -2004,7 +2082,7 @@ type FlushRequest struct {
 var _ = Request(&FlushRequest{})
 
 func (r *FlushRequest) String() string {
-	return fmt.Sprintf("Flush [%s] %#x fl=%#x lk=%#x", &r.Header, r.Handle, r.Flags, r.LockOwner)
+	return fmt.Sprintf("Flush [%s] %v fl=%#x lk=%#x", &r.Header, r.Handle, r.Flags, r.LockOwner)
 }
 
 // Respond replies to the request, indicating that the flush succeeded.
@@ -2065,6 +2143,10 @@ type SymlinkResponse struct {
 	LookupResponse
 }
 
+func (r *SymlinkResponse) String() string {
+	return fmt.Sprintf("Symlink %v", r.LookupResponse.string())
+}
+
 // A ReadlinkRequest is a request to read a symlink's target.
 type ReadlinkRequest struct {
 	Header `json:"-"`
@@ -2119,7 +2201,7 @@ type RenameRequest struct {
 var _ = Request(&RenameRequest{})
 
 func (r *RenameRequest) String() string {
-	return fmt.Sprintf("Rename [%s] from %q to dirnode %d %q", &r.Header, r.OldName, r.NewDir, r.NewName)
+	return fmt.Sprintf("Rename [%s] from %q to dirnode %v %q", &r.Header, r.OldName, r.NewDir, r.NewName)
 }
 
 func (r *RenameRequest) Respond() {
@@ -2132,6 +2214,7 @@ type MknodRequest struct {
 	Name   string
 	Mode   os.FileMode
 	Rdev   uint32
+	// Umask of the request. Not supported on OS X.
 	Umask os.FileMode
 }
 
@@ -2191,3 +2274,30 @@ func (r *InterruptRequest) Respond() {
 func (r *InterruptRequest) String() string {
 	return fmt.Sprintf("Interrupt [%s] ID %v", &r.Header, r.IntrID)
 }
+
+// An ExchangeDataRequest is a request to exchange the contents of two
+// files, while leaving most metadata untouched.
+//
+// This request comes from OS X exchangedata(2) and represents its
+// specific semantics. Crucially, it is very different from Linux
+// renameat(2) RENAME_EXCHANGE.
+//
+// https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man2/exchangedata.2.html
+type ExchangeDataRequest struct {
+	Header           `json:"-"`
+	OldDir, NewDir   NodeID
+	OldName, NewName string
+	// TODO options
+}
+
+var _ = Request(&ExchangeDataRequest{})
+
+func (r *ExchangeDataRequest) String() string {
+	// TODO options
+	return fmt.Sprintf("ExchangeData [%s] %v %q and %v %q", &r.Header, r.OldDir, r.OldName, r.NewDir, r.NewName)
+}
+
+func (r *ExchangeDataRequest) Respond() {
+	buf := newBuffer(0)
+	r.respond(buf)
+}

vendor/src/bazil.org/fuse/fuse_darwin.go

@@ -0,0 +1,9 @@
+package fuse
+
+// Maximum file write size we are prepared to receive from the kernel.
+//
+// This value has to be >=16MB or OSXFUSE (3.4.0 observed) will
+// forcibly close the /dev/fuse file descriptor on a Setxattr with a
+// 16MB value. See TestSetxattr16MB and
+// https://github.com/bazil/fuse/issues/42
+const maxWrite = 16 * 1024 * 1024

vendor/src/bazil.org/fuse/fuse_freebsd.go

@@ -0,0 +1,6 @@
+package fuse
+
+// Maximum file write size we are prepared to receive from the kernel.
+//
+// This number is just a guess.
+const maxWrite = 128 * 1024

vendor/src/bazil.org/fuse/fuse_kernel.go

@@ -62,7 +62,7 @@ type kstatfs struct {
 	Bsize   uint32
 	Namelen uint32
 	Frsize  uint32
-	Padding uint32
+	_       uint32
 	Spare   [6]uint32
 }
 
@@ -159,9 +159,13 @@ const (
 	OpenWriteOnly OpenFlags = syscall.O_WRONLY
 	OpenReadWrite OpenFlags = syscall.O_RDWR
 
+	// File was opened in append-only mode, all writes will go to end
+	// of file. OS X does not provide this information.
 	OpenAppend    OpenFlags = syscall.O_APPEND
 	OpenCreate    OpenFlags = syscall.O_CREAT
+	OpenDirectory OpenFlags = syscall.O_DIRECTORY
 	OpenExclusive OpenFlags = syscall.O_EXCL
+	OpenNonblock  OpenFlags = syscall.O_NONBLOCK
 	OpenSync      OpenFlags = syscall.O_SYNC
 	OpenTruncate  OpenFlags = syscall.O_TRUNC
 )
@@ -213,11 +217,13 @@ func accModeName(flags OpenFlags) string {
 }
 
 var openFlagNames = []flagName{
-	{uint32(OpenCreate), "OpenCreate"},
-	{uint32(OpenExclusive), "OpenExclusive"},
-	{uint32(OpenTruncate), "OpenTruncate"},
 	{uint32(OpenAppend), "OpenAppend"},
+	{uint32(OpenCreate), "OpenCreate"},
+	{uint32(OpenDirectory), "OpenDirectory"},
+	{uint32(OpenExclusive), "OpenExclusive"},
+	{uint32(OpenNonblock), "OpenNonblock"},
 	{uint32(OpenSync), "OpenSync"},
+	{uint32(OpenTruncate), "OpenTruncate"},
 }
 
 // The OpenResponseFlags are returned in the OpenResponse.
@@ -254,6 +260,7 @@ const (
 	InitAtomicTrunc   InitFlags = 1 << 3
 	InitExportSupport InitFlags = 1 << 4
 	InitBigWrites     InitFlags = 1 << 5
+	// Do not mask file access modes with umask. Not supported on OS X.
 	InitDontMask        InitFlags = 1 << 6
 	InitSpliceWrite     InitFlags = 1 << 7
 	InitSpliceMove      InitFlags = 1 << 8
@@ -412,14 +419,14 @@ type forgetIn struct {
 
 type getattrIn struct {
 	GetattrFlags uint32
-	dummy        uint32
+	_            uint32
 	Fh           uint64
 }
 
 type attrOut struct {
 	AttrValid     uint64 // Cache timeout for the attributes
 	AttrValidNsec uint32
-	Dummy         uint32
+	_             uint32
 	Attr          attr
 }
 
@@ -444,7 +451,7 @@ type mknodIn struct {
 	Mode  uint32
 	Rdev  uint32
 	Umask uint32
-	padding uint32
+	_     uint32
 	// "filename\x00" follows.
 }
 
@@ -482,6 +489,7 @@ type exchangeIn struct {
 	Olddir  uint64
 	Newdir  uint64
 	Options uint64
+	// "oldname\x00newname\x00" follows
 }
 
 type linkIn struct {
@@ -490,7 +498,7 @@ type linkIn struct {
 
 type setattrInCommon struct {
 	Valid     uint32
-	Padding   uint32
+	_         uint32
 	Fh        uint64
 	Size      uint64
 	LockOwner uint64 // unused on OS X?
@@ -515,14 +523,14 @@ type openIn struct {
 type openOut struct {
 	Fh        uint64
 	OpenFlags uint32
-	Padding   uint32
+	_         uint32
 }
 
 type createIn struct {
 	Flags uint32
 	Mode  uint32
 	Umask uint32
-	padding uint32
+	_     uint32
 }
 
 func createInSize(p Protocol) uintptr {
@@ -544,7 +552,7 @@ type releaseIn struct {
 type flushIn struct {
 	Fh         uint64
 	FlushFlags uint32
-	Padding    uint32
+	_          uint32
 	LockOwner  uint64
 }
 
@@ -555,7 +563,7 @@ type readIn struct {
 	ReadFlags uint32
 	LockOwner uint64
 	Flags     uint32
-	padding   uint32
+	_         uint32
 }
 
 func readInSize(p Protocol) uintptr {
@@ -590,7 +598,7 @@ type writeIn struct {
 	WriteFlags uint32
 	LockOwner  uint64
 	Flags      uint32
-	padding    uint32
+	_          uint32
 }
 
 func writeInSize(p Protocol) uintptr {
@@ -604,7 +612,7 @@ func writeInSize(p Protocol) uintptr {
 
 type writeOut struct {
 	Size uint32
-	Padding uint32
+	_    uint32
 }
 
 // The WriteFlags are passed in WriteRequest.
@@ -634,7 +642,7 @@ type statfsOut struct {
 type fsyncIn struct {
 	Fh         uint64
 	FsyncFlags uint32
-	Padding    uint32
+	_          uint32
 }
 
 type setxattrInCommon struct {
@@ -648,7 +656,7 @@ func (setxattrInCommon) position() uint32 {
 
 type getxattrInCommon struct {
 	Size uint32
-	Padding uint32
+	_    uint32
 }
 
 func (getxattrInCommon) position() uint32 {
@@ -657,7 +665,7 @@ func (getxattrInCommon) position() uint32 {
 
 type getxattrOut struct {
 	Size uint32
-	Padding uint32
+	_    uint32
 }
 
 type lkIn struct {
@@ -665,7 +673,7 @@ type lkIn struct {
 	Owner   uint64
 	Lk      fileLock
 	LkFlags uint32
-	padding uint32
+	_       uint32
 }
 
 func lkInSize(p Protocol) uintptr {
@@ -683,7 +691,7 @@ type lkOut struct {
 
 type accessIn struct {
 	Mask uint32
-	Padding uint32
+	_    uint32
 }
 
 type initIn struct {
@@ -711,7 +719,7 @@ type interruptIn struct {
 type bmapIn struct {
 	Block     uint64
 	BlockSize uint32
-	Padding   uint32
+	_         uint32
 }
 
 type bmapOut struct {
@@ -726,7 +734,7 @@ type inHeader struct {
 	Uid    uint32
 	Gid    uint32
 	Pid    uint32
-	Padding uint32
+	_      uint32
 }
 
 const inHeaderSize = int(unsafe.Sizeof(inHeader{}))
@@ -762,5 +770,5 @@ type notifyInvalInodeOut struct {
 type notifyInvalEntryOut struct {
 	Parent  uint64
 	Namelen uint32
-	padding uint32
+	_       uint32
 }

vendor/src/bazil.org/fuse/fuse_kernel_test.go

@@ -7,7 +7,7 @@ import (
 	"bazil.org/fuse"
 )
 
-func TestOpenFlagsAccmodeMask(t *testing.T) {
+func TestOpenFlagsAccmodeMaskReadWrite(t *testing.T) {
 	var f = fuse.OpenFlags(os.O_RDWR | os.O_SYNC)
 	if g, e := f&fuse.OpenAccessModeMask, fuse.OpenReadWrite; g != e {
 		t.Fatalf("OpenAccessModeMask behaves wrong: %v: %o != %o", f, g, e)
@@ -23,6 +23,38 @@ func TestOpenFlagsAccmodeMask(t *testing.T) {
 	}
 }
 
+func TestOpenFlagsAccmodeMaskReadOnly(t *testing.T) {
+	var f = fuse.OpenFlags(os.O_RDONLY | os.O_SYNC)
+	if g, e := f&fuse.OpenAccessModeMask, fuse.OpenReadOnly; g != e {
+		t.Fatalf("OpenAccessModeMask behaves wrong: %v: %o != %o", f, g, e)
+	}
+	if !f.IsReadOnly() {
+		t.Fatalf("IsReadOnly is wrong: %v", f)
+	}
+	if f.IsWriteOnly() {
+		t.Fatalf("IsWriteOnly is wrong: %v", f)
+	}
+	if f.IsReadWrite() {
+		t.Fatalf("IsReadWrite is wrong: %v", f)
+	}
+}
+
+func TestOpenFlagsAccmodeMaskWriteOnly(t *testing.T) {
+	var f = fuse.OpenFlags(os.O_WRONLY | os.O_SYNC)
+	if g, e := f&fuse.OpenAccessModeMask, fuse.OpenWriteOnly; g != e {
+		t.Fatalf("OpenAccessModeMask behaves wrong: %v: %o != %o", f, g, e)
+	}
+	if f.IsReadOnly() {
+		t.Fatalf("IsReadOnly is wrong: %v", f)
+	}
+	if !f.IsWriteOnly() {
+		t.Fatalf("IsWriteOnly is wrong: %v", f)
+	}
+	if f.IsReadWrite() {
+		t.Fatalf("IsReadWrite is wrong: %v", f)
+	}
+}
+
 func TestOpenFlagsString(t *testing.T) {
 	var f = fuse.OpenFlags(os.O_RDWR | os.O_SYNC | os.O_APPEND)
 	if g, e := f.String(), "OpenReadWrite+OpenAppend+OpenSync"; g != e {

vendor/src/bazil.org/fuse/fuse_linux.go

@@ -0,0 +1,7 @@
+package fuse
+
+// Maximum file write size we are prepared to receive from the kernel.
+//
+// Linux 4.2.0 has been observed to cap this value at 128kB
+// (FUSE_MAX_PAGES_PER_REQ=32, 4kB pages).
+const maxWrite = 128 * 1024

vendor/src/bazil.org/fuse/mount.go

@@ -0,0 +1,38 @@
+package fuse
+
+import (
+	"bufio"
+	"errors"
+	"io"
+	"log"
+	"sync"
+)
+
+var (
+	// ErrOSXFUSENotFound is returned from Mount when the OSXFUSE
+	// installation is not detected.
+	//
+	// Only happens on OS X. Make sure OSXFUSE is installed, or see
+	// OSXFUSELocations for customization.
+	ErrOSXFUSENotFound = errors.New("cannot locate OSXFUSE")
+)
+
+func neverIgnoreLine(line string) bool {
+	return false
+}
+
+func lineLogger(wg *sync.WaitGroup, prefix string, ignore func(line string) bool, r io.ReadCloser) {
+	defer wg.Done()
+
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if ignore(line) {
+			continue
+		}
+		log.Printf("%s: %s", prefix, line)
+	}
+	if err := scanner.Err(); err != nil {
+		log.Printf("%s, error reading: %v", prefix, err)
+	}
+}

vendor/src/bazil.org/fuse/mount_darwin.go

@@ -1,22 +1,25 @@
 package fuse
 
 import (
-	"bytes"
 	"errors"
 	"fmt"
+	"log"
 	"os"
 	"os/exec"
+	"path"
 	"strconv"
 	"strings"
+	"sync"
 	"syscall"
 )
 
-var errNoAvail = errors.New("no available fuse devices")
+var (
+	errNoAvail   = errors.New("no available fuse devices")
+	errNotLoaded = errors.New("osxfuse is not loaded")
+)
 
-var errNotLoaded = errors.New("osxfusefs is not loaded")
+func loadOSXFUSE(bin string) error {
-
+	cmd := exec.Command(bin)
-func loadOSXFUSE() error {
-	cmd := exec.Command("/Library/Filesystems/osxfusefs.fs/Support/load_osxfusefs")
 	cmd.Dir = "/"
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
@@ -24,11 +27,11 @@ func loadOSXFUSE() error {
 	return err
 }
 
-func openOSXFUSEDev() (*os.File, error) {
+func openOSXFUSEDev(devPrefix string) (*os.File, error) {
 	var f *os.File
 	var err error
 	for i := uint64(0); ; i++ {
-		path := "/dev/osxfuse" + strconv.FormatUint(i, 10)
+		path := devPrefix + strconv.FormatUint(i, 10)
 		f, err = os.OpenFile(path, os.O_RDWR, 0000)
 		if os.IsNotExist(err) {
 			if i == 0 {
@@ -52,9 +55,42 @@ func openOSXFUSEDev() (*os.File, error) {
 	}
 }
 
-func callMount(dir string, conf *mountConfig, f *os.File, ready chan<- struct{}, errp *error) error {
+func handleMountOSXFUSE(helperName string, errCh chan<- error) func(line string) (ignore bool) {
-	bin := "/Library/Filesystems/osxfusefs.fs/Support/mount_osxfusefs"
+	var noMountpointPrefix = helperName + `: `
+	const noMountpointSuffix = `: No such file or directory`
+	return func(line string) (ignore bool) {
+		if strings.HasPrefix(line, noMountpointPrefix) && strings.HasSuffix(line, noMountpointSuffix) {
+			// re-extract it from the error message in case some layer
+			// changed the path
+			mountpoint := line[len(noMountpointPrefix) : len(line)-len(noMountpointSuffix)]
+			err := &MountpointDoesNotExistError{
+				Path: mountpoint,
+			}
+			select {
+			case errCh <- err:
+				return true
+			default:
+				// not the first error; fall back to logging it
+				return false
+			}
+		}
 
+		return false
+	}
+}
+
+// isBoringMountOSXFUSEError returns whether the Wait error is
+// uninteresting; exit status 64 is.
+func isBoringMountOSXFUSEError(err error) bool {
+	if err, ok := err.(*exec.ExitError); ok && err.Exited() {
+		if status, ok := err.Sys().(syscall.WaitStatus); ok && status.ExitStatus() == 64 {
+			return true
+		}
+	}
+	return false
+}
+
+func callMount(bin string, daemonVar string, dir string, conf *mountConfig, f *os.File, ready chan<- struct{}, errp *error) error {
 	for k, v := range conf.options {
 		if strings.Contains(k, ",") || strings.Contains(v, ",") {
 			// Silly limitation but the mount helper does not
@@ -77,50 +113,96 @@ func callMount(dir string, conf *mountConfig, f *os.File, ready chan<- struct{},
 	)
 	cmd.ExtraFiles = []*os.File{f}
 	cmd.Env = os.Environ()
+	// OSXFUSE <3.3.0
 	cmd.Env = append(cmd.Env, "MOUNT_FUSEFS_CALL_BY_LIB=")
-	// TODO this is used for fs typenames etc, let app influence it
+	// OSXFUSE >=3.3.0
-	cmd.Env = append(cmd.Env, "MOUNT_FUSEFS_DAEMON_PATH="+bin)
+	cmd.Env = append(cmd.Env, "MOUNT_OSXFUSE_CALL_BY_LIB=")
-	var buf bytes.Buffer
-	cmd.Stdout = &buf
-	cmd.Stderr = &buf
 
-	err := cmd.Start()
+	daemon := os.Args[0]
-	if err != nil {
+	if daemonVar != "" {
-		return err
+		cmd.Env = append(cmd.Env, daemonVar+"="+daemon)
 	}
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return fmt.Errorf("setting up mount_osxfusefs stderr: %v", err)
+	}
+	stderr, err := cmd.StderrPipe()
+	if err != nil {
+		return fmt.Errorf("setting up mount_osxfusefs stderr: %v", err)
+	}
+
+	if err := cmd.Start(); err != nil {
+		return fmt.Errorf("mount_osxfusefs: %v", err)
+	}
+	helperErrCh := make(chan error, 1)
 	go func() {
-		err := cmd.Wait()
+		var wg sync.WaitGroup
-		if err != nil {
+		wg.Add(2)
-			if buf.Len() > 0 {
+		go lineLogger(&wg, "mount helper output", neverIgnoreLine, stdout)
-				output := buf.Bytes()
+		helperName := path.Base(bin)
-				output = bytes.TrimRight(output, "\n")
+		go lineLogger(&wg, "mount helper error", handleMountOSXFUSE(helperName, helperErrCh), stderr)
-				msg := err.Error() + ": " + string(output)
+		wg.Wait()
-				err = errors.New(msg)
+		if err := cmd.Wait(); err != nil {
+			// see if we have a better error to report
+			select {
+			case helperErr := <-helperErrCh:
+				// log the Wait error if it's not what we expected
+				if !isBoringMountOSXFUSEError(err) {
+					log.Printf("mount helper failed: %v", err)
 				}
+				// and now return what we grabbed from stderr as the real
+				// error
+				*errp = helperErr
+				close(ready)
+				return
+			default:
+				// nope, fall back to generic message
 			}
-		*errp = err
+
+			*errp = fmt.Errorf("mount_osxfusefs: %v", err)
+			close(ready)
+			return
+		}
+
+		*errp = nil
 		close(ready)
 	}()
-	return err
+	return nil
 }
 
 func mount(dir string, conf *mountConfig, ready chan<- struct{}, errp *error) (*os.File, error) {
-	f, err := openOSXFUSEDev()
+	locations := conf.osxfuseLocations
+	if locations == nil {
+		locations = []OSXFUSEPaths{
+			OSXFUSELocationV3,
+			OSXFUSELocationV2,
+		}
+	}
+	for _, loc := range locations {
+		if _, err := os.Stat(loc.Mount); os.IsNotExist(err) {
+			// try the other locations
+			continue
+		}
+
+		f, err := openOSXFUSEDev(loc.DevicePrefix)
 		if err == errNotLoaded {
-		err = loadOSXFUSE()
+			err = loadOSXFUSE(loc.Load)
 			if err != nil {
 				return nil, err
 			}
 			// try again
-		f, err = openOSXFUSEDev()
+			f, err = openOSXFUSEDev(loc.DevicePrefix)
 		}
 		if err != nil {
 			return nil, err
 		}
-	err = callMount(dir, conf, f, ready, errp)
+		err = callMount(loc.Mount, loc.DaemonVar, dir, conf, f, ready, errp)
 		if err != nil {
 			f.Close()
 			return nil, err
 		}
 		return f, nil
 	}
+	return nil, ErrOSXFUSENotFound
+}

vendor/src/bazil.org/fuse/mount_freebsd.go

@@ -2,11 +2,51 @@ package fuse
 
 import (
 	"fmt"
+	"log"
 	"os"
 	"os/exec"
 	"strings"
+	"sync"
+	"syscall"
 )
 
+func handleMountFusefsStderr(errCh chan<- error) func(line string) (ignore bool) {
+	return func(line string) (ignore bool) {
+		const (
+			noMountpointPrefix = `mount_fusefs: `
+			noMountpointSuffix = `: No such file or directory`
+		)
+		if strings.HasPrefix(line, noMountpointPrefix) && strings.HasSuffix(line, noMountpointSuffix) {
+			// re-extract it from the error message in case some layer
+			// changed the path
+			mountpoint := line[len(noMountpointPrefix) : len(line)-len(noMountpointSuffix)]
+			err := &MountpointDoesNotExistError{
+				Path: mountpoint,
+			}
+			select {
+			case errCh <- err:
+				return true
+			default:
+				// not the first error; fall back to logging it
+				return false
+			}
+		}
+
+		return false
+	}
+}
+
+// isBoringMountFusefsError returns whether the Wait error is
+// uninteresting; exit status 1 is.
+func isBoringMountFusefsError(err error) bool {
+	if err, ok := err.(*exec.ExitError); ok && err.Exited() {
+		if status, ok := err.Sys().(syscall.WaitStatus); ok && status.ExitStatus() == 1 {
+			return true
+		}
+	}
+	return false
+}
+
 func mount(dir string, conf *mountConfig, ready chan<- struct{}, errp *error) (*os.File, error) {
 	for k, v := range conf.options {
 		if strings.Contains(k, ",") || strings.Contains(v, ",") {
@@ -31,9 +71,39 @@ func mount(dir string, conf *mountConfig, ready chan<- struct{}, errp *error) (*
 	)
 	cmd.ExtraFiles = []*os.File{f}
 
-	out, err := cmd.CombinedOutput()
+	stdout, err := cmd.StdoutPipe()
 	if err != nil {
-		return nil, fmt.Errorf("mount_fusefs: %q, %v", out, err)
+		return nil, fmt.Errorf("setting up mount_fusefs stderr: %v", err)
+	}
+	stderr, err := cmd.StderrPipe()
+	if err != nil {
+		return nil, fmt.Errorf("setting up mount_fusefs stderr: %v", err)
+	}
+
+	if err := cmd.Start(); err != nil {
+		return nil, fmt.Errorf("mount_fusefs: %v", err)
+	}
+	helperErrCh := make(chan error, 1)
+	var wg sync.WaitGroup
+	wg.Add(2)
+	go lineLogger(&wg, "mount helper output", neverIgnoreLine, stdout)
+	go lineLogger(&wg, "mount helper error", handleMountFusefsStderr(helperErrCh), stderr)
+	wg.Wait()
+	if err := cmd.Wait(); err != nil {
+		// see if we have a better error to report
+		select {
+		case helperErr := <-helperErrCh:
+			// log the Wait error if it's not what we expected
+			if !isBoringMountFusefsError(err) {
+				log.Printf("mount helper failed: %v", err)
+			}
+			// and now return what we grabbed from stderr as the real
+			// error
+			return nil, helperErr
+		default:
+			// nope, fall back to generic message
+		}
+		return nil, fmt.Errorf("mount_fusefs: %v", err)
 	}
 
 	close(ready)

vendor/src/bazil.org/fuse/mount_linux.go

@@ -1,37 +1,60 @@
 package fuse
 
 import (
-	"bufio"
 	"fmt"
-	"io"
 	"log"
 	"net"
 	"os"
 	"os/exec"
+	"strings"
 	"sync"
 	"syscall"
 )
 
-func lineLogger(wg *sync.WaitGroup, prefix string, r io.ReadCloser) {
+func handleFusermountStderr(errCh chan<- error) func(line string) (ignore bool) {
-	defer wg.Done()
+	return func(line string) (ignore bool) {
-
+		if line == `fusermount: failed to open /etc/fuse.conf: Permission denied` {
-	scanner := bufio.NewScanner(r)
-	for scanner.Scan() {
-		switch line := scanner.Text(); line {
-		case `fusermount: failed to open /etc/fuse.conf: Permission denied`:
 			// Silence this particular message, it occurs way too
 			// commonly and isn't very relevant to whether the mount
 			// succeeds or not.
-			continue
+			return true
+		}
+
+		const (
+			noMountpointPrefix = `fusermount: failed to access mountpoint `
+			noMountpointSuffix = `: No such file or directory`
+		)
+		if strings.HasPrefix(line, noMountpointPrefix) && strings.HasSuffix(line, noMountpointSuffix) {
+			// re-extract it from the error message in case some layer
+			// changed the path
+			mountpoint := line[len(noMountpointPrefix) : len(line)-len(noMountpointSuffix)]
+			err := &MountpointDoesNotExistError{
+				Path: mountpoint,
+			}
+			select {
+			case errCh <- err:
+				return true
 			default:
-			log.Printf("%s: %s", prefix, line)
+				// not the first error; fall back to logging it
+				return false
 			}
 		}
-	if err := scanner.Err(); err != nil {
+
-		log.Printf("%s, error reading: %v", prefix, err)
+		return false
 	}
 }
 
+// isBoringFusermountError returns whether the Wait error is
+// uninteresting; exit status 1 is.
+func isBoringFusermountError(err error) bool {
+	if err, ok := err.(*exec.ExitError); ok && err.Exited() {
+		if status, ok := err.Sys().(syscall.WaitStatus); ok && status.ExitStatus() == 1 {
+			return true
+		}
+	}
+	return false
+}
+
 func mount(dir string, conf *mountConfig, ready chan<- struct{}, errp *error) (fusefd *os.File, err error) {
 	// linux mount is never delayed
 	close(ready)
@@ -70,11 +93,26 @@ func mount(dir string, conf *mountConfig, ready chan<- struct{}, errp *error) (f
 	if err := cmd.Start(); err != nil {
 		return nil, fmt.Errorf("fusermount: %v", err)
 	}
+	helperErrCh := make(chan error, 1)
 	wg.Add(2)
-	go lineLogger(&wg, "mount helper output", stdout)
+	go lineLogger(&wg, "mount helper output", neverIgnoreLine, stdout)
-	go lineLogger(&wg, "mount helper error", stderr)
+	go lineLogger(&wg, "mount helper error", handleFusermountStderr(helperErrCh), stderr)
 	wg.Wait()
 	if err := cmd.Wait(); err != nil {
+		// see if we have a better error to report
+		select {
+		case helperErr := <-helperErrCh:
+			// log the Wait error if it's not what we expected
+			if !isBoringFusermountError(err) {
+				log.Printf("mount helper failed: %v", err)
+			}
+			// and now return what we grabbed from stderr as the real
+			// error
+			return nil, helperErr
+		default:
+			// nope, fall back to generic message
+		}
+
 		return nil, fmt.Errorf("fusermount: %v", err)
 	}
 

vendor/src/bazil.org/fuse/options.go

@@ -15,6 +15,7 @@ type mountConfig struct {
 	options          map[string]string
 	maxReadahead     uint32
 	initFlags        InitFlags
+	osxfuseLocations []OSXFUSEPaths
 }
 
 func escapeComma(s string) string {
@@ -82,6 +83,63 @@ func VolumeName(name string) MountOption {
 	return volumeName(name)
 }
 
+// NoAppleDouble makes OSXFUSE disallow files with names used by OS X
+// to store extended attributes on file systems that do not support
+// them natively.
+//
+// Such file names are:
+//
+//     ._*
+//     .DS_Store
+//
+// OS X only.  Others ignore this option.
+func NoAppleDouble() MountOption {
+	return noAppleDouble
+}
+
+// NoAppleXattr makes OSXFUSE disallow extended attributes with the
+// prefix "com.apple.". This disables persistent Finder state and
+// other such information.
+//
+// OS X only.  Others ignore this option.
+func NoAppleXattr() MountOption {
+	return noAppleXattr
+}
+
+// ExclCreate causes O_EXCL flag to be set for only "truly" exclusive creates,
+// i.e. create calls for which the initiator explicitly set the O_EXCL flag.
+//
+// OSXFUSE expects all create calls to return EEXIST in case the file
+// already exists, regardless of whether O_EXCL was specified or not.
+// To ensure this behavior, it normally sets OpenExclusive for all
+// Create calls, regardless of whether the original call had it set.
+// For distributed filesystems, that may force every file create to be
+// a distributed consensus action, causing undesirable delays.
+//
+// This option makes the FUSE filesystem see the original flag value,
+// and better decide when to ensure global consensus.
+//
+// Note that returning EEXIST on existing file create is still
+// expected with OSXFUSE, regardless of the presence of the
+// OpenExclusive flag.
+//
+// For more information, see
+// https://github.com/osxfuse/osxfuse/issues/209
+//
+// OS X only. Others ignore this options.
+// Requires OSXFUSE 3.4.1 or newer.
+func ExclCreate() MountOption {
+	return exclCreate
+}
+
+// DaemonTimeout sets the time in seconds between a request and a reply before
+// the FUSE mount is declared dead.
+//
+// OS X and FreeBSD only. Others ignore this option.
+func DaemonTimeout(name string) MountOption {
+	return daemonTimeout(name)
+}
+
 var ErrCannotCombineAllowOtherAndAllowRoot = errors.New("cannot combine AllowOther and AllowRoot")
 
 // AllowOther allows other users to access the file system.
@@ -112,6 +170,24 @@ func AllowRoot() MountOption {
 	}
 }
 
+// AllowDev enables interpreting character or block special devices on the
+// filesystem.
+func AllowDev() MountOption {
+	return func(conf *mountConfig) error {
+		conf.options["dev"] = ""
+		return nil
+	}
+}
+
+// AllowSUID allows set-user-identifier or set-group-identifier bits to take
+// effect.
+func AllowSUID() MountOption {
+	return func(conf *mountConfig) error {
+		conf.options["suid"] = ""
+		return nil
+	}
+}
+
 // DefaultPermissions makes the kernel enforce access control based on
 // the file mode (as in chmod).
 //
@@ -168,3 +244,67 @@ func WritebackCache() MountOption {
 		return nil
 	}
 }
+
+// OSXFUSEPaths describes the paths used by an installed OSXFUSE
+// version. See OSXFUSELocationV3 for typical values.
+type OSXFUSEPaths struct {
+	// Prefix for the device file. At mount time, an incrementing
+	// number is suffixed until a free FUSE device is found.
+	DevicePrefix string
+	// Path of the load helper, used to load the kernel extension if
+	// no device files are found.
+	Load string
+	// Path of the mount helper, used for the actual mount operation.
+	Mount string
+	// Environment variable used to pass the path to the executable
+	// calling the mount helper.
+	DaemonVar string
+}
+
+// Default paths for OSXFUSE. See OSXFUSELocations.
+var (
+	OSXFUSELocationV3 = OSXFUSEPaths{
+		DevicePrefix: "/dev/osxfuse",
+		Load:         "/Library/Filesystems/osxfuse.fs/Contents/Resources/load_osxfuse",
+		Mount:        "/Library/Filesystems/osxfuse.fs/Contents/Resources/mount_osxfuse",
+		DaemonVar:    "MOUNT_OSXFUSE_DAEMON_PATH",
+	}
+	OSXFUSELocationV2 = OSXFUSEPaths{
+		DevicePrefix: "/dev/osxfuse",
+		Load:         "/Library/Filesystems/osxfusefs.fs/Support/load_osxfusefs",
+		Mount:        "/Library/Filesystems/osxfusefs.fs/Support/mount_osxfusefs",
+		DaemonVar:    "MOUNT_FUSEFS_DAEMON_PATH",
+	}
+)
+
+// OSXFUSELocations sets where to look for OSXFUSE files. The
+// arguments are all the possible locations. The previous locations
+// are replaced.
+//
+// Without this option, OSXFUSELocationV3 and OSXFUSELocationV2 are
+// used.
+//
+// OS X only. Others ignore this option.
+func OSXFUSELocations(paths ...OSXFUSEPaths) MountOption {
+	return func(conf *mountConfig) error {
+		if len(paths) == 0 {
+			return errors.New("must specify at least one location for OSXFUSELocations")
+		}
+		// replace previous values, but make a copy so there's no
+		// worries about caller mutating their slice
+		conf.osxfuseLocations = append(conf.osxfuseLocations[:0], paths...)
+		return nil
+	}
+}
+
+// AllowNonEmptyMount allows the mounting over a non-empty directory.
+//
+// The files in it will be shadowed by the freshly created mount. By
+// default these mounts are rejected to prevent accidental covering up
+// of data, which could for example prevent automatic backup.
+func AllowNonEmptyMount() MountOption {
+	return func(conf *mountConfig) error {
+		conf.options["nonempty"] = ""
+		return nil
+	}
+}

vendor/src/bazil.org/fuse/options_daemon_timeout_test.go

@@ -0,0 +1,64 @@
+// Test for adjustable timeout between a FUSE request and the daemon's response.
+//
+// +build darwin freebsd
+
+package fuse_test
+
+import (
+	"os"
+	"runtime"
+	"syscall"
+	"testing"
+	"time"
+
+	"bazil.org/fuse"
+	"bazil.org/fuse/fs"
+	"bazil.org/fuse/fs/fstestutil"
+	"golang.org/x/net/context"
+)
+
+type slowCreaterDir struct {
+	fstestutil.Dir
+}
+
+var _ fs.NodeCreater = slowCreaterDir{}
+
+func (c slowCreaterDir) Create(ctx context.Context, req *fuse.CreateRequest, resp *fuse.CreateResponse) (fs.Node, fs.Handle, error) {
+	time.Sleep(10 * time.Second)
+	// pick a really distinct error, to identify it later
+	return nil, nil, fuse.Errno(syscall.ENAMETOOLONG)
+}
+
+func TestMountOptionDaemonTimeout(t *testing.T) {
+	if runtime.GOOS != "darwin" && runtime.GOOS != "freebsd" {
+		return
+	}
+	if testing.Short() {
+		t.Skip("skipping time-based test in short mode")
+	}
+	t.Parallel()
+
+	mnt, err := fstestutil.MountedT(t,
+		fstestutil.SimpleFS{slowCreaterDir{}},
+		nil,
+		fuse.DaemonTimeout("2"),
+	)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mnt.Close()
+
+	// This should fail by the kernel timing out the request.
+	f, err := os.Create(mnt.Dir + "/child")
+	if err == nil {
+		f.Close()
+		t.Fatal("expected an error")
+	}
+	perr, ok := err.(*os.PathError)
+	if !ok {
+		t.Fatalf("expected PathError, got %T: %v", err, err)
+	}
+	if perr.Err == syscall.ENAMETOOLONG {
+		t.Fatalf("expected other than ENAMETOOLONG, got %T: %v", err, err)
+	}
+}

vendor/src/bazil.org/fuse/options_darwin.go

@@ -11,3 +11,25 @@ func volumeName(name string) MountOption {
 		return nil
 	}
 }
+
+func daemonTimeout(name string) MountOption {
+	return func(conf *mountConfig) error {
+		conf.options["daemon_timeout"] = name
+		return nil
+	}
+}
+
+func noAppleXattr(conf *mountConfig) error {
+	conf.options["noapplexattr"] = ""
+	return nil
+}
+
+func noAppleDouble(conf *mountConfig) error {
+	conf.options["noappledouble"] = ""
+	return nil
+}
+
+func exclCreate(conf *mountConfig) error {
+	conf.options["excl_create"] = ""
+	return nil
+}

vendor/src/bazil.org/fuse/options_freebsd.go

@@ -7,3 +7,22 @@ func localVolume(conf *mountConfig) error {
 func volumeName(name string) MountOption {
 	return dummyOption
 }
+
+func daemonTimeout(name string) MountOption {
+	return func(conf *mountConfig) error {
+		conf.options["timeout"] = name
+		return nil
+	}
+}
+
+func noAppleXattr(conf *mountConfig) error {
+	return nil
+}
+
+func noAppleDouble(conf *mountConfig) error {
+	return nil
+}
+
+func exclCreate(conf *mountConfig) error {
+	return nil
+}

vendor/src/bazil.org/fuse/options_linux.go

@@ -7,3 +7,19 @@ func localVolume(conf *mountConfig) error {
 func volumeName(name string) MountOption {
 	return dummyOption
 }
+
+func daemonTimeout(name string) MountOption {
+	return dummyOption
+}
+
+func noAppleXattr(conf *mountConfig) error {
+	return nil
+}
+
+func noAppleDouble(conf *mountConfig) error {
+	return nil
+}
+
+func exclCreate(conf *mountConfig) error {
+	return nil
+}

vendor/src/bazil.org/fuse/options_test.go

@@ -165,6 +165,7 @@ func TestMountOptionDefaultPermissions(t *testing.T) {
 		t.Skip("FreeBSD does not support DefaultPermissions")
 	}
 	t.Parallel()
+
 	mnt, err := fstestutil.MountedT(t,
 		fstestutil.SimpleFS{
 			&fstestutil.ChildMap{"child": unwritableFile{}},
@@ -172,7 +173,6 @@ func TestMountOptionDefaultPermissions(t *testing.T) {
 		nil,
 		fuse.DefaultPermissions(),
 	)
-
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -203,12 +203,12 @@ func (createrDir) Create(ctx context.Context, req *fuse.CreateRequest, resp *fus
 
 func TestMountOptionReadOnly(t *testing.T) {
 	t.Parallel()
+
 	mnt, err := fstestutil.MountedT(t,
 		fstestutil.SimpleFS{createrDir{}},
 		nil,
 		fuse.ReadOnly(),
 	)
-
 	if err != nil {
 		t.Fatal(err)
 	}