TCA_BPF_FLAGS_GEN
if (tb[TCA_BPF_FLAGS_GEN]) {
gen_flags = nla_get_u32(tb[TCA_BPF_FLAGS_GEN]);
[TCA_BPF_FLAGS_GEN] = { .type = NLA_U32 },
nla_put_u32(skb, TCA_BPF_FLAGS_GEN, prog->gen_flags))