OVS_PACKET_ATTR_PACKET
if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) {
if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
[OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },