From 1755ffd1f3e1cf31ff2ce1b934f8e61c8d26a517 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Thu, 3 May 2018 09:15:32 +0100
Subject: [PATCH] mount: make Get/List/Set/Remove xattr return ENOSYS #2287

By default bazil fuse will return ENOTSUPP for these.  However if we
return ENOSYS then OSXFUSE (at least) will never call them again
saving round trips though fuse.
---
 cmd/mount/file.go | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/cmd/mount/file.go b/cmd/mount/file.go
index 29fbbed02..d03d52d0b 100644
--- a/cmd/mount/file.go
+++ b/cmd/mount/file.go
@@ -92,3 +92,37 @@ func (f *File) Fsync(ctx context.Context, req *fuse.FsyncRequest) (err error) {
 	defer log.Trace(f, "")("err=%v", &err)
 	return nil
 }
+
+// Getxattr gets an extended attribute by the given name from the
+// node.
+//
+// If there is no xattr by that name, returns fuse.ErrNoXattr.
+func (f *File) Getxattr(ctx context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
+	return fuse.ENOSYS // we never implement this
+}
+
+var _ fusefs.NodeGetxattrer = (*File)(nil)
+
+// Listxattr lists the extended attributes recorded for the node.
+func (f *File) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
+	return fuse.ENOSYS // we never implement this
+}
+
+var _ fusefs.NodeListxattrer = (*File)(nil)
+
+// Setxattr sets an extended attribute with the given name and
+// value for the node.
+func (f *File) Setxattr(ctx context.Context, req *fuse.SetxattrRequest) error {
+	return fuse.ENOSYS // we never implement this
+}
+
+var _ fusefs.NodeSetxattrer = (*File)(nil)
+
+// Removexattr removes an extended attribute for the name.
+//
+// If there is no xattr by that name, returns fuse.ErrNoXattr.
+func (f *File) Removexattr(ctx context.Context, req *fuse.RemovexattrRequest) error {
+	return fuse.ENOSYS // we never implement this
+}
+
+var _ fusefs.NodeRemovexattrer = (*File)(nil)