Btrfs: check duplicate backrefs for both data and metadata (85d4198e) · Commits · 戴 / test

fs/btrfs/extent-tree.c

+4 −11

Original line number	Diff line number	Diff line
		@@ -1056,7 +1056,6 @@ int lookup_inline_extent_backref(struct btrfs_trans_handle *trans,
		want = extent_ref_type(parent, owner);
		if (insert) {
		extra_size = btrfs_extent_inline_ref_size(want);
		if (owner >= BTRFS_FIRST_FREE_OBJECTID)
		path->keep_locks = 1;
		} else
		extra_size = -1;
		@@ -1087,12 +1086,6 @@ int lookup_inline_extent_backref(struct btrfs_trans_handle *trans,
		#endif
		BUG_ON(item_size < sizeof(*ei));

		if (owner < BTRFS_FIRST_FREE_OBJECTID && insert &&
		item_size + extra_size >= BTRFS_MAX_EXTENT_ITEM_SIZE(root)) {
		err = -EAGAIN;
		goto out;
		}

		ei = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
		flags = btrfs_extent_flags(leaf, ei);

		@@ -1165,15 +1158,15 @@ int lookup_inline_extent_backref(struct btrfs_trans_handle *trans,
		* For simplicity, we just do not add new inline back
		* ref if there is any kind of item for this block
		*/
		if (owner >= BTRFS_FIRST_FREE_OBJECTID &&
		find_next_key(path, &key) == 0 && key.objectid == bytenr) {
		if (find_next_key(path, &key) == 0 && key.objectid == bytenr &&
		key.type < BTRFS_BLOCK_GROUP_ITEM_KEY) {
		err = -EAGAIN;
		goto out;
		}
		}
		ref_ret = (struct btrfs_extent_inline_ref )ptr;
		out:
		if (insert && owner >= BTRFS_FIRST_FREE_OBJECTID) {
		if (insert) {
		path->keep_locks = 0;
		btrfs_unlock_up_safe(path, 1);
		}