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From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Tue, 23 Mar 2021 00:56:26 +0100
Subject: [PATCH] netfilter: flowtable: call dst_check() to fall back to
classic forwarding
In case the route is stale, pass up the packet to the classic forwarding
path for re-evaluation and schedule this flow entry for removal.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
--- a/net/netfilter/nf_flow_table_ip.c
+++ b/net/netfilter/nf_flow_table_ip.c
@@ -197,14 +197,6 @@ static bool nf_flow_exceeds_mtu(const st
return true;
}
-static int nf_flow_offload_dst_check(struct dst_entry *dst)
-{
- if (unlikely(dst_xfrm(dst)))
- return dst_check(dst, 0) ? 0 : -1;
-
- return 0;
-}
-
static unsigned int nf_flow_xmit_xfrm(struct sk_buff *skb,
const struct nf_hook_state *state,
struct dst_entry *dst)
@@ -256,7 +248,7 @@ nf_flow_offload_ip_hook(void *priv, stru
flow_offload_refresh(flow_table, flow);
- if (nf_flow_offload_dst_check(&rt->dst)) {
+ if (!dst_check(&rt->dst, 0)) {
flow_offload_teardown(flow);
return NF_ACCEPT;
}
@@ -476,7 +468,7 @@ nf_flow_offload_ipv6_hook(void *priv, st
flow_offload_refresh(flow_table, flow);
- if (nf_flow_offload_dst_check(&rt->dst)) {
+ if (!dst_check(&rt->dst, 0)) {
flow_offload_teardown(flow);
return NF_ACCEPT;
}
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