bcachefs: Run scan_old_btree_nodes after version upgrade

In the recovery path, we scan for old btree nodes if we don't have
certain compat bits set. If we do this, we should be doing it after we
upgraded to the newest on disk format.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

diff --git a/fs/bcachefs/recovery.c b/fs/bcachefs/recovery.c
index ffa8ab9..f6dc557 100644 (file)
--- a/fs/bcachefs/recovery.c
+++ b/fs/bcachefs/recovery.c
@@ -1298,33 +1298,14 @@ use_clean:
                bch_verbose(c, "quotas done");
        }
 
-       if (!(c->sb.compat & (1ULL << BCH_COMPAT_extents_above_btree_updates_done)) ||
-           !(c->sb.compat & (1ULL << BCH_COMPAT_bformat_overflow_done)) ||
-           le16_to_cpu(c->sb.version_min) < bcachefs_metadata_version_btree_ptr_sectors_written) {
-               struct bch_move_stats stats;
-
-               bch_move_stats_init(&stats, "recovery");
-
-               bch_info(c, "scanning for old btree nodes");
-               ret = bch2_fs_read_write(c);
-               if (ret)
-                       goto err;
-
-               ret = bch2_scan_old_btree_nodes(c, &stats);
-               if (ret)
-                       goto err;
-               bch_info(c, "scanning for old btree nodes done");
-       }
-
        mutex_lock(&c->sb_lock);
        /*
         * With journal replay done, we can clear the journal seq blacklist
         * table:
         */
        BUG_ON(!test_bit(JOURNAL_REPLAY_DONE, &c->journal.flags));
-       BUG_ON(le16_to_cpu(c->sb.version_min) < bcachefs_metadata_version_btree_ptr_sectors_written);
-
-       bch2_sb_resize_journal_seq_blacklist(&c->disk_sb, 0);
+       if (le16_to_cpu(c->sb.version_min) >= bcachefs_metadata_version_btree_ptr_sectors_written)
+               bch2_sb_resize_journal_seq_blacklist(&c->disk_sb, 0);
 
        if (c->opts.version_upgrade) {
                c->disk_sb.sb->version = cpu_to_le16(bcachefs_metadata_version_current);
@@ -1349,6 +1330,24 @@ use_clean:
                bch2_write_super(c);
        mutex_unlock(&c->sb_lock);
 
+       if (!(c->sb.compat & (1ULL << BCH_COMPAT_extents_above_btree_updates_done)) ||
+           !(c->sb.compat & (1ULL << BCH_COMPAT_bformat_overflow_done)) ||
+           le16_to_cpu(c->sb.version_min) < bcachefs_metadata_version_btree_ptr_sectors_written) {
+               struct bch_move_stats stats;
+
+               bch_move_stats_init(&stats, "recovery");
+
+               bch_info(c, "scanning for old btree nodes");
+               ret = bch2_fs_read_write(c);
+               if (ret)
+                       goto err;
+
+               ret = bch2_scan_old_btree_nodes(c, &stats);
+               if (ret)
+                       goto err;
+               bch_info(c, "scanning for old btree nodes done");
+       }
+
        ret = 0;
 out:
        set_bit(BCH_FS_FSCK_DONE, &c->flags);