LWTUNNEL_IP_OPT_ERSPAN_MAX
erspan_opt_policy[LWTUNNEL_IP_OPT_ERSPAN_MAX + 1] = {
struct nlattr *tb[LWTUNNEL_IP_OPT_ERSPAN_MAX + 1];
err = nla_parse_nested(tb, LWTUNNEL_IP_OPT_ERSPAN_MAX, attr,