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