add disableXAttr in mount option

weed/mount/weedfs.go

@@ -40,6 +40,7 @@ type Option struct {
 	DataCenter         string
 	Umask              os.FileMode
 	Quota              int64
+	DisableXAttr       bool
 
 	MountUid         uint32
 	MountGid         uint32

weed/mount/weedfs_xattr.go

@@ -20,6 +20,10 @@ const (
 // with the required buffer size.
 func (wfs *WFS) GetXAttr(cancel <-chan struct{}, header *fuse.InHeader, attr string, dest []byte) (size uint32, code fuse.Status) {
 
+	if wfs.option.DisableXAttr {
+		return 0, fuse.Status(syscall.ENOTSUP)
+	}
+
 	//validate attr name
 	if len(attr) > MAX_XATTR_NAME_SIZE {
 		if runtime.GOOS == "darwin" {
@@ -70,6 +74,10 @@ func (wfs *WFS) GetXAttr(cancel <-chan struct{}, header *fuse.InHeader, attr str
 //              attribute does not already exist.
 func (wfs *WFS) SetXAttr(cancel <-chan struct{}, input *fuse.SetXAttrIn, attr string, data []byte) fuse.Status {
 
+	if wfs.option.DisableXAttr {
+		return fuse.Status(syscall.ENOTSUP)
+	}
+
 	if wfs.IsOverQuota {
 		return fuse.Status(syscall.ENOSPC)
 	}
@@ -127,6 +135,11 @@ func (wfs *WFS) SetXAttr(cancel <-chan struct{}, input *fuse.SetXAttrIn, attr st
 // slice, and return the number of bytes. If the buffer is too
 // small, return ERANGE, with the required buffer size.
 func (wfs *WFS) ListXAttr(cancel <-chan struct{}, header *fuse.InHeader, dest []byte) (n uint32, code fuse.Status) {
+
+	if wfs.option.DisableXAttr {
+		return 0, fuse.Status(syscall.ENOTSUP)
+	}
+
 	_, _, entry, status := wfs.maybeReadEntry(header.NodeId)
 	if status != fuse.OK {
 		return 0, status
@@ -156,6 +169,11 @@ func (wfs *WFS) ListXAttr(cancel <-chan struct{}, header *fuse.InHeader, dest []
 
 // RemoveXAttr removes an extended attribute.
 func (wfs *WFS) RemoveXAttr(cancel <-chan struct{}, header *fuse.InHeader, attr string) fuse.Status {
+
+	if wfs.option.DisableXAttr {
+		return fuse.Status(syscall.ENOTSUP)
+	}
+
 	if len(attr) == 0 {
 		return fuse.EINVAL
 	}