diff mbox series

[nf,1/3] netfilter: nf_flow_table_offload: fix dst_neigh lookup for dnat

Message ID 1576145237-20290-2-git-send-email-wenxu@ucloud.cn
State Superseded
Delegated to: Pablo Neira
Headers show
Series netfilter: nf_flow_table_offload: something fixes | expand

Commit Message

wenxu Dec. 12, 2019, 10:07 a.m. UTC 
From: wenxu <wenxu@ucloud.cn>

Get the dst_neigh through dst_ip, The dst_ip should get
through peer tuple.src_v4 fix for dnat case.

Fixes: c29f74e0df7a ("netfilter: nf_flow_table: hardware offload support")
Signed-off-by: wenxu <wenxu@ucloud.cn>
---
 net/netfilter/nf_flow_table_offload.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
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Patch

diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
index de7a0d1..91dd6eb 100644
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -166,14 +166,16 @@  static int flow_offload_eth_dst(struct net *net,
 				enum flow_offload_tuple_dir dir,
 				struct nf_flow_rule *flow_rule)
 {
-	const struct flow_offload_tuple *tuple = &flow->tuplehash[dir].tuple;
 	struct flow_action_entry *entry0 = flow_action_entry_next(flow_rule);
 	struct flow_action_entry *entry1 = flow_action_entry_next(flow_rule);
+	const void *daddr = &flow->tuplehash[!dir].tuple.src_v4;
+	const struct dst_entry *dst_cache;
 	struct neighbour *n;
 	u32 mask, val;
 	u16 val16;
 
-	n = dst_neigh_lookup(tuple->dst_cache, &tuple->dst_v4);
+	dst_cache = flow->tuplehash[dir].tuple.dst_cache;
+	n = dst_neigh_lookup(dst_cache, daddr);
 	if (!n)
 		return -ENOENT;