LWTUNNEL_IP_OPT_ERSPAN_VER
[LWTUNNEL_IP_OPT_ERSPAN_VER] = { .type = NLA_U8 },
if (!tb[LWTUNNEL_IP_OPT_ERSPAN_VER])
ver = nla_get_u8(tb[LWTUNNEL_IP_OPT_ERSPAN_VER]);
if (nla_put_u8(skb, LWTUNNEL_IP_OPT_ERSPAN_VER, md->version))