Commit 0181e58f authored by Yan's avatar Yan Committed by Chris Mason
Browse files

btrfs_drop_extent fixe for inline items > 8K 



When truncating a inline extent, btrfs_drop_extents doesn't properly
handle the case "key.offset > inline_limit". This bug can only happen
when max line size is larger than 8K.

Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 1b0f7c29

fs/btrfs/file.c

+3 −5
Original line number Diff line number Diff line
@@ -591,8 +591,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, 
				}

			}

			bookend = 1;

			if (found_inline && start <= key.offset &&

			    inline_limit < extent_end)

			if (found_inline && start <= key.offset)

				keep = 1;

		}

		/* truncate existing extent */
@@ -672,11 +671,10 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, 
			if (!bookend)

				continue;

		}

		if (bookend && found_inline && start <= key.offset &&

		    inline_limit < extent_end && key.offset <= inline_limit) {

		if (bookend && found_inline && start <= key.offset) {

			u32 new_size;

			new_size = btrfs_file_extent_calc_inline_size(

						   extent_end - inline_limit);

						   extent_end - end);

			btrfs_truncate_item(trans, root, path, new_size, 0);

		}

		/* create bookend, splitting the extent in two */