kernel: add a small xfrm related performance optimization

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

Backport of r41950

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42008 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2014-08-06 10:30:14 +00:00
parent 8c11c916df
commit ca6cac962a
1 changed files with 13 additions and 0 deletions

View File

@ -0,0 +1,13 @@
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -89,6 +89,9 @@ int nf_xfrm_me_harder(struct sk_buff *sk
struct dst_entry *dst;
int err;
+ if (!dev_net(skb->dev)->xfrm.policy_count[XFRM_POLICY_OUT])
+ return 0;
+
err = xfrm_decode_session(skb, &fl, family);
if (err < 0)
return err;