bcachefs: On missing backpointer to interior node, flush interior updates

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/backpointers.c b/fs/bcachefs/backpointers.c
index 2fb96fa99f42716fb7f681477400b37d3cb84b29..eb826457ff6bc6052a805b8d4560d8659801e995 100644 (file)
--- a/fs/bcachefs/backpointers.c
+++ b/fs/bcachefs/backpointers.c
@@ -441,6 +441,11 @@ static int check_bp_exists(struct btree_trans *trans,
            memcmp(bkey_s_c_to_backpointer(bp_k).v, &bp, sizeof(bp))) {
                if (last_flushed->level != bp.level ||
                    !bpos_eq(last_flushed->pos, orig_k.k->p)) {
+                       if (bp.level) {
+                               bch2_trans_unlock(trans);
+                               bch2_btree_interior_updates_flush(c);
+                       }
+
                        ret = bch2_btree_write_buffer_flush_sync(trans);
                        if (ret)
                                goto err;