bcachefs: Add version check for bch_btree_ptr_v2.sectors_written validate

A user popped up with a very old (0.11) filesystem that needed repair
and wasn't recently backed up.

Reported-by: Manoa <manoa@mail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/extents.c b/fs/bcachefs/extents.c
index 37e3d69bec06ad21944dfabd6e02b797abcd6fab..85b98c782e1b67a5b4c064df02e613ce6a0fd378 100644 (file)
--- a/fs/bcachefs/extents.c
+++ b/fs/bcachefs/extents.c
@@ -203,7 +203,8 @@ int bch2_btree_ptr_v2_validate(struct bch_fs *c, struct bkey_s_c k,
                         c, btree_ptr_v2_min_key_bad,
                         "min_key > key");
 
-       if (flags & BCH_VALIDATE_write)
+       if ((flags & BCH_VALIDATE_write) &&
+           c->sb.version_min >= bcachefs_metadata_version_btree_ptr_sectors_written)
                bkey_fsck_err_on(!bp.v->sectors_written,
                                 c, btree_ptr_v2_written_0,
                                 "sectors_written == 0");