Btrfs: bugfix in btrfs_find_parent_nodes (dadcaf78) · Commits · 戴 / test

That one has been around since the addition of backref.c. Due to the way we calculate our slot numbers, after adding inline refs we're missing one keyed ref unless it's located at the beginning of a new leaf. Reported-by:

Alexander Block <ablock84@googlemail.com> Signed-off-by:

Jan Schmidt <list.btrfs@jan-o-sch.net>

fs/btrfs/backref.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -413,7 +413,7 @@ static int __add_inline_refs(struct btrfs_fs_info *fs_info,
		* enumerate all inline refs
		*/
		leaf = path->nodes[0];
		slot = path->slots[0] - 1;
		slot = path->slots[0];

		item_size = btrfs_item_size_nr(leaf, slot);
		BUG_ON(item_size < sizeof(*ei));
		@@ -661,8 +661,9 @@ again:
		struct extent_buffer *leaf;
		int slot;

		path->slots[0]--;
		leaf = path->nodes[0];
		slot = path->slots[0] - 1;
		slot = path->slots[0];
		btrfs_item_key_to_cpu(leaf, &key, slot);
		if (key.objectid == bytenr &&
		key.type == BTRFS_EXTENT_ITEM_KEY) {

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