Btrfs: don't add a NULL extended attribute
Passing a null extended attribute value means to remove the attribute,
but we don't have to add a new NULL extended attribute.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index e9d3840..aef6bb3 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -122,6 +122,16 @@
*/
if (!value)
goto out;
+ } else {
+ di = btrfs_lookup_xattr(NULL, root, path, btrfs_ino(inode),
+ name, name_len, 0);
+ if (IS_ERR(di)) {
+ ret = PTR_ERR(di);
+ goto out;
+ }
+ if (!di && !value)
+ goto out;
+ btrfs_release_path(path);
}
again: