EIB_IPHDR_ALIGN_ROOM
mtu + EIB_GRH_SZ + EIB_IPHDR_ALIGN_ROOM, EIB_WP_TYPE_RX);
wqe->qe_bufsz = mtu + EIB_GRH_SZ + EIB_IPHDR_ALIGN_ROOM;
buf += (mtu + EIB_GRH_SZ + EIB_IPHDR_ALIGN_ROOM);