Add String() to the File API.

fuse/api.go

@@ -143,6 +143,9 @@ type File interface {
 	// Called upon registering the filehandle in the inode.
 	SetInode(*Inode)
 
+	// The String method is for debug printing.
+	String() string
+
 	// Wrappers around other File implementations, should return
 	// the inner file here.
 	InnerFile() File

fuse/defaultfile.go

@@ -14,6 +14,10 @@ func (me *DefaultFile) InnerFile() File {
 	return nil
 }
 
+func (me *DefaultFile) String() string {
+	return "DefaultFile"
+}
+
 func (me *DefaultFile) Read(*ReadIn, BufferPool) ([]byte, Status) {
 	return []byte(""), ENOSYS
 }

fuse/files.go

@@ -42,6 +42,11 @@ func NewDevNullFile() *DevNullFile {
 	return new(DevNullFile)
 }
 
+func (me *DevNullFile) String() string {
+	return "DevNullFile"
+}
+
+
 func (me *DevNullFile) Read(input *ReadIn, bp BufferPool) ([]byte, Status) {
 	return []byte{}, OK
 }
@@ -71,6 +76,10 @@ type LoopbackFile struct {
 	DefaultFile
 }
 
+func (me *LoopbackFile) String() string {
+	return fmt.Sprintf("LoopbackFile(%s)", me.File.Name())
+}
+
 func (me *LoopbackFile) Read(input *ReadIn, buffers BufferPool) ([]byte, Status) {
 	slice := buffers.AllocBuffer(input.Size)
 
@@ -124,6 +133,10 @@ type ReadOnlyFile struct {
 	File
 }
 
+func (me *ReadOnlyFile) String() string {
+	return fmt.Sprintf("ReadOnlyFile(%s)", me.File.String())
+}
+
 func (me *ReadOnlyFile) Write(input *WriteIn, data []byte) (uint32, Status) {
 	return 0, EPERM
 }

fuse/memnode.go

@@ -140,6 +140,10 @@ type memNodeFile struct {
 	node *memNode
 }
 
+func (me *memNodeFile) String() string {
+	return fmt.Sprintf("memNodeFile(%s)", me.LoopbackFile.String())
+}
+
 func (me *memNodeFile) InnerFile() File {
 	return &me.LoopbackFile
 }

unionfs/memunionfs.go

@@ -202,7 +202,7 @@ func (me *MemUnionFs) getFilename() string {
 	id := me.nextFree
 	me.nextFree++
 	if me.nextFree % 1000 == 0 {
-		go me.gc()
+		// go me.gc()
 	}
 	return fmt.Sprintf("%s/%d", me.backingStore, id)
 }
@@ -435,6 +435,10 @@ type memNodeFile struct {
 	node     *memNode
 }
 
+func (me *memNodeFile) String() string {
+	return fmt.Sprintf("memUfsFile(%s)", me.File.String())
+}
+
 func (me *memNodeFile) InnerFile() fuse.File {
 	return me.File
 }

unionfs/unionfs.go

@@ -971,6 +971,10 @@ type unionFsFile struct {
 	layer int
 }
 
+func (me *unionFsFile) String() string {
+	return fmt.Sprintf("unionFsFile(%s)", me.File.String())
+}
+
 func (me *UnionFs) newUnionFsFile(f fuse.File, branch int) *unionFsFile {
 	return &unionFsFile{
 		File:  f,