to_srv_con
err = post_recv_io(to_srv_con(srv_path->s.con[cid]), q_size);
struct rtrs_srv_con *con = to_srv_con(wc->qp->qp_context);
struct rtrs_srv_con *con = to_srv_con(wc->qp->qp_context);
con = to_srv_con(srv_path->s.con[i]);
con = to_srv_con(srv_path->s.con[i]);
struct rtrs_srv_con *con = to_srv_con(wc->qp->qp_context);
struct rtrs_srv_con *con = to_srv_con(wc->qp->qp_context);
struct rtrs_srv_con *con = to_srv_con(wc->qp->qp_context);