+EXPORT_SYMBOL_GPL(ovs_vport_deferred_free);
+
+int ovs_tunnel_get_egress_info(struct dp_upcall_info *upcall,
+ struct net *net,
+ struct sk_buff *skb,
+ u8 ipproto,
+ __be16 tp_src,
+ __be16 tp_dst)
+{
+ struct ip_tunnel_info *egress_tun_info = upcall->egress_tun_info;
+ struct ip_tunnel_info *tun_info = skb_tunnel_info(skb);
+ const struct ip_tunnel_key *tun_key;
+ u32 skb_mark = skb->mark;
+ struct rtable *rt;
+ struct flowi4 fl;
+
+ if (unlikely(!tun_info))
+ return -EINVAL;
+ if (ip_tunnel_info_af(tun_info) != AF_INET)
+ return -EINVAL;
+
+ tun_key = &tun_info->key;
+
+ /* Route lookup to get srouce IP address.
+ * The process may need to be changed if the corresponding process
+ * in vports ops changed.
+ */
+ rt = ovs_tunnel_route_lookup(net, tun_key, skb_mark, &fl, ipproto);
+ if (IS_ERR(rt))
+ return PTR_ERR(rt);
+
+ ip_rt_put(rt);
+
+ /* Generate egress_tun_info based on tun_info,
+ * saddr, tp_src and tp_dst
+ */
+ ip_tunnel_key_init(&egress_tun_info->key,
+ fl.saddr, tun_key->u.ipv4.dst,
+ tun_key->tos,
+ tun_key->ttl,
+ tp_src, tp_dst,
+ tun_key->tun_id,
+ tun_key->tun_flags);
+ egress_tun_info->options_len = tun_info->options_len;
+ egress_tun_info->mode = tun_info->mode;
+ upcall->egress_tun_opts = ip_tunnel_info_opts(tun_info);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ovs_tunnel_get_egress_info);
+
+int ovs_vport_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
+ struct dp_upcall_info *upcall)
+{
+ /* get_egress_tun_info() is only implemented on tunnel ports. */
+ if (unlikely(!vport->ops->get_egress_tun_info))
+ return -EINVAL;
+
+ return vport->ops->get_egress_tun_info(vport, skb, upcall);
+}
+
+static unsigned int packet_length(const struct sk_buff *skb)
+{
+ unsigned int length = skb->len - ETH_HLEN;
+
+ if (skb->protocol == htons(ETH_P_8021Q))
+ length -= VLAN_HLEN;
+
+ return length;
+}
+
+void ovs_vport_send(struct vport *vport, struct sk_buff *skb)
+{
+ int mtu = vport->dev->mtu;
+
+ if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) {
+ net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n",
+ vport->dev->name,
+ packet_length(skb), mtu);
+ vport->dev->stats.tx_errors++;
+ goto drop;
+ }
+
+ skb->dev = vport->dev;
+ vport->ops->send(skb);
+ return;
+
+drop:
+ kfree_skb(skb);
+}