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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: 18bb8bbf13 ("btrfs: zoned: automatically reclaim zones")
CC: stable@vger.kernel.org # 5.13
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2021-06-23 17:54:54 +02:00
parent 629e33a168
commit 54afaae34e
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/block-group.c
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@ -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)