NFTA_TUNNEL_KEY_OPTS_VXLAN
[NFTA_TUNNEL_KEY_OPTS_VXLAN] = { .type = NLA_NESTED, },
case NFTA_TUNNEL_KEY_OPTS_VXLAN:
inner = nla_nest_start_noflag(skb, NFTA_TUNNEL_KEY_OPTS_VXLAN);