diff options
| -rw-r--r-- | net/ipv4/ip_tunnel.c | 38 |
1 files changed, 27 insertions, 11 deletions
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index 893f013d5369..2973067b831d 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -654,14 +654,17 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, const struct iphdr *tnl_params, u8 protocol) { struct ip_tunnel *tunnel = netdev_priv(dev); + struct ip_tunnel_info *tun_info = NULL; const struct iphdr *inner_iph; - struct flowi4 fl4; - u8 tos, ttl; - __be16 df; - struct rtable *rt; /* Route to the other host */ unsigned int max_headroom; /* The extra header space needed */ - __be32 dst; + struct rtable *rt = NULL; /* Route to the other host */ + bool use_cache = false; + struct flowi4 fl4; + bool md = false; bool connected; + u8 tos, ttl; + __be32 dst; + __be16 df; inner_iph = (const struct iphdr *)skb_inner_network_header(skb); connected = (tunnel->parms.iph.daddr != 0); @@ -671,7 +674,6 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, dst = tnl_params->daddr; if (dst == 0) { /* NBMA tunnel */ - struct ip_tunnel_info *tun_info; if (!skb_dst(skb)) { dev->stats.tx_fifo_errors++; @@ -681,8 +683,11 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, tun_info = skb_tunnel_info(skb); if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX) && ip_tunnel_info_af(tun_info) == AF_INET && - tun_info->key.u.ipv4.dst) + tun_info->key.u.ipv4.dst) { dst = tun_info->key.u.ipv4.dst; + md = true; + connected = true; + } else if (skb->protocol == htons(ETH_P_IP)) { rt = skb_rtable(skb); dst = rt_nexthop(rt, inner_iph->daddr); @@ -721,7 +726,8 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, else goto tx_error; - connected = false; + if (!md) + connected = false; } tos = tnl_params->tos; @@ -743,8 +749,15 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, if (ip_tunnel_encap(skb, tunnel, &protocol, &fl4) < 0) goto tx_error; - rt = connected ? dst_cache_get_ip4(&tunnel->dst_cache, &fl4.saddr) : - NULL; + if (connected && md) { + use_cache = ip_tunnel_dst_cache_usable(skb, tun_info); + if (use_cache) + rt = dst_cache_get_ip4(&tun_info->dst_cache, + &fl4.saddr); + } else { + rt = connected ? dst_cache_get_ip4(&tunnel->dst_cache, + &fl4.saddr) : NULL; + } if (!rt) { rt = ip_route_output_key(tunnel->net, &fl4); @@ -753,7 +766,10 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, dev->stats.tx_carrier_errors++; goto tx_error; } - if (connected) + if (use_cache) + dst_cache_set_ip4(&tun_info->dst_cache, &rt->dst, + fl4.saddr); + else if (!md && connected) dst_cache_set_ip4(&tunnel->dst_cache, &rt->dst, fl4.saddr); } |