Btrfs: snapshot progress

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 7c21f63f1b93..efc604eea0b0 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -77,6 +77,12 @@ static int lookup_block_ref(struct btrfs_trans_handle *trans, struct btrfs_root
         return 0;
 }
 
+int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
+                       struct btrfs_root *root)
+{
+        return inc_block_ref(trans, root, root->node->b_blocknr, 1);
+}
+
 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
                   struct buffer_head *buf)
 {