net/sched: act_tunnel_key: Add dst_cache support

The metadata_dst is not init the dst_cache which make the
ip_md_tunnel_xmit can't use the dst_cache. It will lookup
route table every packets.

Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/act_tunnel_key.c b/net/sched/act_tunnel_key.c
index 9104b8e..3404af7 100644 (file)
--- a/net/sched/act_tunnel_key.c
+++ b/net/sched/act_tunnel_key.c
@@ -321,12 +321,18 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
                        goto err_out;
                }
 
+#ifdef CONFIG_DST_CACHE
+               ret = dst_cache_init(&metadata->u.tun_info.dst_cache, GFP_KERNEL);
+               if (ret)
+                       goto release_tun_meta;
+#endif
+
                if (opts_len) {
                        ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
                                                  &metadata->u.tun_info,
                                                  opts_len, extack);
                        if (ret < 0)
-                               goto release_tun_meta;
+                               goto release_dst_cache;
                }
 
                metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX;
@@ -342,14 +348,14 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
                                     &act_tunnel_key_ops, bind, true);
                if (ret) {
                        NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
-                       goto release_tun_meta;
+                       goto release_dst_cache;
                }
 
                ret = ACT_P_CREATED;
        } else if (!ovr) {
                NL_SET_ERR_MSG(extack, "TC IDR already exists");
                ret = -EEXIST;
-               goto release_tun_meta;
+               goto release_dst_cache;
        }
 
        t = to_tunnel_key(*a);
@@ -359,7 +365,7 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
                NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
                ret = -ENOMEM;
                exists = true;
-               goto release_tun_meta;
+               goto release_dst_cache;
        }
        params_new->tcft_action = parm->t_action;
        params_new->tcft_enc_metadata = metadata;
@@ -376,6 +382,10 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 
        return ret;
 
+release_dst_cache:
+#ifdef CONFIG_DST_CACHE
+       dst_cache_destroy(&metadata->u.tun_info.dst_cache);
+#endif
 release_tun_meta:
        dst_release(&metadata->dst);
 
@@ -391,8 +401,15 @@ static void tunnel_key_release(struct tc_action *a)
 {
        struct tcf_tunnel_key *t = to_tunnel_key(a);
        struct tcf_tunnel_key_params *params;
+#ifdef CONFIG_DST_CACHE
+       struct ip_tunnel_info *info;
+#endif
 
        params = rcu_dereference_protected(t->params, 1);
+#ifdef CONFIG_DST_CACHE
+       info = &params->tcft_enc_metadata->u.tun_info;
+       dst_cache_destroy(&info->dst_cache);
+#endif
        tunnel_key_release_params(params);
 }