Ceph » CephFS

`fs subvolume rm` fails when subvolume dir attempted to move to a different dir where the following code fails in src/mds/Server.cc:Server::handle_client_rename

    if (src_realm != dest_realm &&
        src_realm->get_subvolume_ino() != dest_realm->get_subvolume_ino()) {
      respond_to_request(mdr, -CEPHFS_EXDEV);
      return;
    }