From: wenxu <we...@ucloud.cn>
The lwtunnel_state 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 <we...@ucloud.cn>
---
net/ipv4/ip_tunnel_core.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 9a0e67b..6168b90 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -252,6 +252,12 @@ static int ip_tun_build_state(struct nlattr *attr,
tun_info = lwt_tun_info(new_state);
+ err = dst_cache_init(&tun_info->dst_cache, GFP_ATOMIC);
+ if (err) {
+ lwtstate_free(new_state);
+ return err;
+ }
+
if (tb[LWTUNNEL_IP_ID])
tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP_ID]);
@@ -278,6 +284,13 @@ static int ip_tun_build_state(struct nlattr *attr,
return 0;
}
+static int ip_tun_destroy_state(struct lwtunnel_state *lwtstate)
+{
+ struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate);
+
+ dst_cache_destroy(&tun_info->dst_cache);
+}
+
static int ip_tun_fill_encap_info(struct sk_buff *skb,
struct lwtunnel_state *lwtstate)
{
@@ -313,6 +326,7 @@ static int ip_tun_cmp_encap(struct lwtunnel_state *a,
struct lwtunnel_state *b)
static const struct lwtunnel_encap_ops ip_tun_lwt_ops = {
.build_state = ip_tun_build_state,
+ .destroy_state = ip_tun_destroy_state,
.fill_encap = ip_tun_fill_encap_info,
.get_encap_size = ip_tun_encap_nlsize,
.cmp_encap = ip_tun_cmp_encap,
--
1.8.3.1
