struct ip_tunnel_info *tun_info;
const struct ip_tunnel_key *key;
const struct iphdr *inner_iph;
- struct rtable *rt;
+ struct rtable *rt = NULL;
struct flowi4 fl4;
__be16 df = 0;
u8 tos, ttl;
+ bool use_cache;
tun_info = skb_tunnel_info(skb);
if (unlikely(!tun_info || !(tun_info->mode & IP_TUNNEL_INFO_TX) ||
RT_TOS(tos), tunnel->parms.link, tunnel->fwmark);
if (tunnel->encap.type != TUNNEL_ENCAP_NONE)
goto tx_error;
- rt = ip_route_output_key(tunnel->net, &fl4);
- if (IS_ERR(rt)) {
- dev->stats.tx_carrier_errors++;
- goto tx_error;
+
+ use_cache = ip_tunnel_dst_cache_usable(skb, tun_info);
+ if (use_cache)
+ rt = dst_cache_get_ip4(&tun_info->dst_cache, &fl4.saddr);
+ if (!rt) {
+ rt = ip_route_output_key(tunnel->net, &fl4);
+ if (IS_ERR(rt)) {
+ dev->stats.tx_carrier_errors++;
+ goto tx_error;
+ }
+ if (use_cache)
+ dst_cache_set_ip4(&tun_info->dst_cache, &rt->dst,
+ fl4.saddr);
}
if (rt->dst.dev == dev) {
ip_rt_put(rt);