Commit 54afaae3 authored by David Sterba's avatar David Sterba
Browse files

btrfs: zoned: fix types for u64 division in btrfs_reclaim_bgs_work 



The types in calculation of the used percentage in the reclaiming
messages are both u64, though bg->length is either 1GiB (non-zoned) or
the zone size in the zoned mode. The upper limit on zone size is 8GiB so
this could theoretically overflow in the future, right now the values
fit.

Fixes: 18bb8bbf ("btrfs: zoned: automatically reclaim zones")
CC: stable@vger.kernel.org # 5.13
Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 629e33a1

fs/btrfs/block-group.c

+1 −1
Original line number Diff line number Diff line
@@ -1540,7 +1540,7 @@ void btrfs_reclaim_bgs_work(struct work_struct *work) 
			goto next;



		btrfs_info(fs_info, "reclaiming chunk %llu with %llu%% used",

				bg->start, div_u64(bg->used * 100, bg->length));

				bg->start, div64_u64(bg->used * 100, bg->length));

		trace_btrfs_reclaim_block_group(bg);

		ret = btrfs_relocate_chunk(fs_info, bg->start);

		if (ret)