Commit 9ce49a0b authored Apr 24, 2014 by Filipe Manana Committed by Chris Mason Apr 24, 2014

Btrfs: use correct key when repeating search for extent item



If skinny metadata is enabled and our first tree search fails to find a
skinny extent item, we may repeat a tree search for a "fat" extent item
(if the previous item in the leaf is not the "fat" extent we're looking
for). However we were not setting the new key's objectid to the right
value, as we previously used the same key variable to peek at the previous
item in the leaf, which has a different objectid. So just set the right
objectid to avoid modifying/deleting a wrong item if we repeat the tree
search.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>

parent 1c70d8fb

fs/btrfs/extent-tree.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1542,6 +1542,7 @@ int lookup_inline_extent_backref(struct btrfs_trans_handle *trans,
		ret = 0;
		}
		if (ret) {
		key.objectid = bytenr;
		key.type = BTRFS_EXTENT_ITEM_KEY;
		key.offset = num_bytes;
		btrfs_release_path(path);
		@@ -5719,6 +5720,7 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,

		if (ret > 0 && skinny_metadata) {
		skinny_metadata = false;
		key.objectid = bytenr;
		key.type = BTRFS_EXTENT_ITEM_KEY;
		key.offset = num_bytes;
		btrfs_release_path(path);