RDMA_READ
status = RDMA_READ(conn, cllong, WAIT);
status = RDMA_READ(*conn, &cl, WAIT);
status = RDMA_READ(*conn, &cl, NOWAIT);
status = RDMA_READ(xdrp->xp_conn, &cl, WAIT);
status = RDMA_READ(xdrp->xp_conn, &cl, NOWAIT);