Btrfs: Add back pointers from extents to the btree or file referencing them

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

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c
index 3994795edfeb..5c58630dce03 100644
--- a/fs/btrfs/tree-defrag.c
+++ b/fs/btrfs/tree-defrag.c
@@ -78,6 +78,8 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
                         break;
 
                 if (*level == 1) {
+                        WARN_ON(btrfs_header_generation(path->nodes[*level]) !=
+                                                        trans->transid);
                         ret = btrfs_realloc_node(trans, root,
                                                  path->nodes[*level],
                                                  path->slots[*level],