path: root/ctree.c
diff options
authorYan <>2008-02-01 14:58:07 -0500
committerDavid Woodhouse <>2008-02-01 14:58:07 -0500
commitece29db27976fb78f0294ebe69a2b50161cc98a3 (patch)
tree72218ba7b1b1be95cb07774d2553b0b638c49187 /ctree.c
parentd2255c7c2f20bc5fc953317d851da8e38da92563 (diff)
Call btrfs_cow_block while lowering tree level.
When freeing root block of a tree, btrfs_free_extent' parameter 'ref_generation' is from root block itseft. When freeing non-root block, 'ref_generation' is from its parent. so when converting a non-root block to root block, we must guarantee its generation is equal to its parent's generation.
Diffstat (limited to 'ctree.c')
1 files changed, 3 insertions, 0 deletions
diff --git a/ctree.c b/ctree.c
index 4f7e6d0e..0e2fe7f6 100644
--- a/ctree.c
+++ b/ctree.c
@@ -686,6 +686,9 @@ static int balance_level(struct btrfs_trans_handle *trans,
/* promote the child to a root */
child = read_node_slot(root, mid, 0);
+ ret = btrfs_cow_block(trans, root, child, mid, 0, &child);
+ BUG_ON(ret);
root->node = child;
path->nodes[level] = NULL;
clean_tree_block(trans, root, mid);