Add encap_proto (AF_INET or AF_INET6) to struct flow_offload_tunnel to allow its use as part of the hash table key during flowtable entry lookup. This is a preliminary change to support IPv4 over IPv6 tunneling via the flowtable infrastructure for software acceleration. Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@oss.qualcomm.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>