-#ifdef __BIG_ENDIAN
- return (__force __be32)x;
-#else
- return (__force __be32)((__force u64)x >> 32);
-#endif
-}
-
-static __be16 filter_tnl_flags(__be16 flags)
-{
- return flags & (TUNNEL_CSUM | TUNNEL_KEY);
-}
-
-static struct sk_buff *__build_header(struct sk_buff *skb,
- int tunnel_hlen)
-{
- struct tnl_ptk_info tpi;
- const struct ovs_key_ipv4_tunnel *tun_key;
-
- tun_key = &OVS_CB(skb)->egress_tun_info->tunnel;
-
- skb = gre_handle_offloads(skb, !!(tun_key->tun_flags & TUNNEL_CSUM));
- if (IS_ERR(skb))
- return skb;
-
- tpi.flags = filter_tnl_flags(tun_key->tun_flags);
- tpi.proto = htons(ETH_P_TEB);
- tpi.key = be64_get_low32(tun_key->tun_id);
- tpi.seq = 0;
- gre_build_header(skb, &tpi, tunnel_hlen);
-
- return skb;
-}
-
-static __be64 key_to_tunnel_id(__be32 key, __be32 seq)
-{
-#ifdef __BIG_ENDIAN
- return (__force __be64)((__force u64)seq << 32 | (__force u32)key);
-#else
- return (__force __be64)((__force u64)key << 32 | (__force u32)seq);
-#endif
-}
-
-/* Called with rcu_read_lock and BH disabled. */
-static int gre_rcv(struct sk_buff *skb,
- const struct tnl_ptk_info *tpi)
-{
- struct ovs_tunnel_info tun_info;
- struct ovs_net *ovs_net;
- struct vport *vport;
- __be64 key;
-
- ovs_net = net_generic(dev_net(skb->dev), ovs_net_id);
- vport = rcu_dereference(ovs_net->vport_net.gre_vport);
- if (unlikely(!vport))
- return PACKET_REJECT;
-
- key = key_to_tunnel_id(tpi->key, tpi->seq);
- ovs_flow_tun_info_init(&tun_info, ip_hdr(skb), 0, 0, key,
- filter_tnl_flags(tpi->flags), NULL, 0);
-
- ovs_vport_receive(vport, skb, &tun_info);
- return PACKET_RCVD;
-}
-
-/* Called with rcu_read_lock and BH disabled. */
-static int gre_err(struct sk_buff *skb, u32 info,
- const struct tnl_ptk_info *tpi)
-{
- struct ovs_net *ovs_net;