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From: Felix Fietkau <nbd@nbd.name>
Subject: kernel: add a small xfrm related performance optimization
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
net/netfilter/nf_nat_core.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -93,6 +93,9 @@ int nf_xfrm_me_harder(struct net *net, s
struct dst_entry *dst;
int err;
+ if (skb->dev && !dev_net(skb->dev)->xfrm.policy_count[XFRM_POLICY_OUT])
+ return 0;
+
err = xfrm_decode_session(skb, &fl, family);
if (err < 0)
return err;
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