bcachefs: Fix infinite loop in propagate_key_to_snapshot_leaves()

As we iterate we need to mark that we no longer need iterators -
otherwise we'll infinite loop via the "too many iters" check when
there's many snapshots.

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

diff --git a/fs/bcachefs/snapshot.c b/fs/bcachefs/snapshot.c
index dff83ebbd912c2183729683a41cbeba886a56cc2..1809442b00ee44699c9ca7f9b509ed3d3e01f7c2 100644 (file)
--- a/fs/bcachefs/snapshot.c
+++ b/fs/bcachefs/snapshot.c
@@ -1784,6 +1784,7 @@ static int bch2_propagate_key_to_snapshot_leaf(struct btree_trans *trans,
        new->k.p.snapshot = leaf_id;
        ret = bch2_trans_update(trans, &iter, new, 0);
 out:
+       bch2_set_btree_iter_dontneed(&iter);
        bch2_trans_iter_exit(trans, &iter);
        return ret;
 }