Commit 0ae79c6f authored by Naohiro Aota's avatar Naohiro Aota Committed by David Sterba
Browse files

btrfs: zoned: fix block group alloc_offset calculation 



alloc_offset is offset from the start of a block group and @offset is
actually an address in logical space. Thus, we need to consider
block_group->start when calculating them.

Fixes: 011b41bf ("btrfs: zoned: advance allocation pointer after tree log node")
CC: stable@vger.kernel.org # 5.12+
Signed-off-by: default avatarNaohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent ba86dd9f

fs/btrfs/free-space-cache.c

+5 −2
Original line number Diff line number Diff line
@@ -2647,8 +2647,11 @@ int btrfs_remove_free_space(struct btrfs_block_group *block_group, 
		 * btrfs_pin_extent_for_log_replay() when replaying the log.

		 * Advance the pointer not to overwrite the tree-log nodes.

		 */

		if (block_group->alloc_offset < offset + bytes)

			block_group->alloc_offset = offset + bytes;

		if (block_group->start + block_group->alloc_offset <

		    offset + bytes) {

			block_group->alloc_offset =

				offset + bytes - block_group->start;

		}

		return 0;

	}