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ip_tunnel: Add dst_cache support in lwtunnel_state of ip tunnel

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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 <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
wenxu 2019-02-23 21:32:54 +08:00 committed by David S. Miller
parent 2b794c4098
commit 3d25eabbbf
2 changed files with 26 additions and 8 deletions
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16
net/core/lwtunnel.c
View File

@ -122,18 +122,18 @@ int lwtunnel_build_state(u16 encap_type,
ret = -EOPNOTSUPP;
rcu_read_lock();
ops = rcu_dereference(lwtun_encaps[encap_type]);
if (likely(ops && ops->build_state && try_module_get(ops->owner))) {
if (likely(ops && ops->build_state && try_module_get(ops->owner)))
found = true;
rcu_read_unlock();
if (found) {
ret = ops->build_state(encap, family, cfg, lws, extack);
if (ret)
module_put(ops->owner);
}
rcu_read_unlock();
/* don't rely on -EOPNOTSUPP to detect match as build_state
* handlers could return it
*/
if (!found) {
} else {
/* don't rely on -EOPNOTSUPP to detect match as build_state
* handlers could return it
*/
NL_SET_ERR_MSG_ATTR(extack, encap,
"LWT encapsulation type not supported");
}

18
net/ipv4/ip_tunnel_core.c
View File

@ -252,6 +252,14 @@ static int ip_tun_build_state(struct nlattr *attr,
tun_info = lwt_tun_info(new_state);
#ifdef CONFIG_DST_CACHE
err = dst_cache_init(&tun_info->dst_cache, GFP_KERNEL);
if (err) {
lwtstate_free(new_state);
return err;
}
#endif
if (tb[LWTUNNEL_IP_ID])
tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP_ID]);
@ -278,6 +286,15 @@ static int ip_tun_build_state(struct nlattr *attr,
return 0;
}
static void ip_tun_destroy_state(struct lwtunnel_state *lwtstate)
{
#ifdef CONFIG_DST_CACHE
struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate);
dst_cache_destroy(&tun_info->dst_cache);
#endif
}
static int ip_tun_fill_encap_info(struct sk_buff *skb,
struct lwtunnel_state *lwtstate)
{
@ -313,6 +330,7 @@ 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,