LS_NLA_TYPE_DGID
memcpy(&gid, nla_data(tb[LS_NLA_TYPE_DGID]), sizeof(gid));
[LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
if (!tb[LS_NLA_TYPE_DGID])
[LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,