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btrfs: scrub: run relocation repair when/only needed

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commit 7192833c4e55b26e8f15ef58577867a1bc808036 upstream.

When btrfs scrub finds an error, it reads mirrors to find correct data. If
all the errors are fixed, sctx->error_bitmap is cleared for the stripe
range. However, in the zoned mode, it runs relocation to repair scrub
errors when the bitmap is *not* empty, which is a flipped condition.

Also, it runs the relocation even if the scrub is read-only. This was
missed by a fix in commit 1f2030ff6e49 ("btrfs: scrub: respect the
read-only flag during repair").

The repair is only necessary when there is a repaired sector and should be
done on read-write scrub. So, tweak the condition for both regular and
zoned case.

Fixes: 54765392a1b9 ("btrfs: scrub: introduce helper to queue a stripe for scrub")
Fixes: 1f2030ff6e49 ("btrfs: scrub: respect the read-only flag during repair")
CC: stable@vger.kernel.org # 6.6+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Naohiro Aota 2024-04-09 23:18:52 +09:00 committed by Greg Kroah-Hartman
parent 73aa8ea03a
commit e498cc00e6
1 changed files with 9 additions and 9 deletions
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18
fs/btrfs/scrub.c
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@ -1013,6 +1013,7 @@ static void scrub_stripe_read_repair_worker(struct work_struct *work)
struct btrfs_fs_info *fs_info = sctx->fs_info;
int num_copies = btrfs_num_copies(fs_info, stripe->bg->start,
stripe->bg->length);
unsigned long repaired;
int mirror;
int i;
@ -1079,16 +1080,15 @@ out:
* Submit the repaired sectors. For zoned case, we cannot do repair
* in-place, but queue the bg to be relocated.
*/
if (btrfs_is_zoned(fs_info)) {
if (!bitmap_empty(&stripe->error_bitmap, stripe->nr_sectors))
bitmap_andnot(&repaired, &stripe->init_error_bitmap, &stripe->error_bitmap,
stripe->nr_sectors);
if (!sctx->readonly && !bitmap_empty(&repaired, stripe->nr_sectors)) {
if (btrfs_is_zoned(fs_info)) {
btrfs_repair_one_zone(fs_info, sctx->stripes[0].bg->start);
} else if (!sctx->readonly) {
unsigned long repaired;
bitmap_andnot(&repaired, &stripe->init_error_bitmap,
&stripe->error_bitmap, stripe->nr_sectors);
scrub_write_sectors(sctx, stripe, repaired, false);
wait_scrub_stripe_io(stripe);
} else {
scrub_write_sectors(sctx, stripe, repaired, false);
wait_scrub_stripe_io(stripe);
}
}
scrub_stripe_report_errors(sctx, stripe);