btrfs: zoned: use zone aware sb location for scrub

At the moment scrub_supers() doesn't grab the super block's location via
the zoned device aware btrfs_sb_log_location() but via btrfs_sb_offset().

This leads to checksum errors on 'scrub' as we're not accessing the
correct location of the super block.

So use btrfs_sb_log_location() for getting the super blocks location on
scrub.

Reported-by: WA AM <waautomata@gmail.com>
Link: http://lore.kernel.org/linux-btrfs/CANU2Z0EvUzfYxczLgGUiREoMndE9WdQnbaawV5Fv5gNXptPUKw@mail.gmail.com
CC: stable@vger.kernel.org # 5.15+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index c4bd0e60db59253f280236740d23ed1c5b7b92f7..fa25004ab04e7b28d73dee024303c0dab4077db6 100644 (file)
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -2812,7 +2812,17 @@ static noinline_for_stack int scrub_supers(struct scrub_ctx *sctx,
                gen = btrfs_get_last_trans_committed(fs_info);
 
        for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
-               bytenr = btrfs_sb_offset(i);
+               ret = btrfs_sb_log_location(scrub_dev, i, 0, &bytenr);
+               if (ret == -ENOENT)
+                       break;
+
+               if (ret) {
+                       spin_lock(&sctx->stat_lock);
+                       sctx->stat.super_errors++;
+                       spin_unlock(&sctx->stat_lock);
+                       continue;
+               }
+
                if (bytenr + BTRFS_SUPER_INFO_SIZE >
                    scrub_dev->commit_total_bytes)
                        break;