IFLA_MAP
if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
[IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
if (tb[IFLA_MAP]) {
u_map = nla_data(tb[IFLA_MAP]);
if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])