netdev - [PATCH 28/31] netfilter: nf_flow_table: remove unnecessary nat flag check code

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Date:   Tue,  9 Oct 2018 01:01:22 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     netfilter-devel@...r.kernel.org
Cc:     davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 28/31] netfilter: nf_flow_table: remove unnecessary nat flag check code

From: Taehee Yoo <ap420073@...il.com>

nf_flow_offload_{ip/ipv6}_hook() check nat flag then, call
nf_flow_nat_{ip/ipv6} but that also check nat flag. so that
nat flag check code in nf_flow_offload_{ip/ipv6}_hook() are unnecessary.

Signed-off-by: Taehee Yoo <ap420073@...il.com>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
 net/netfilter/nf_flow_table_ip.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c
index 15ed91309992..1d291a51cd45 100644
--- a/net/netfilter/nf_flow_table_ip.c
+++ b/net/netfilter/nf_flow_table_ip.c
@@ -254,8 +254,7 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
 	if (nf_flow_state_check(flow, ip_hdr(skb)->protocol, skb, thoff))
 		return NF_ACCEPT;
 
-	if (flow->flags & (FLOW_OFFLOAD_SNAT | FLOW_OFFLOAD_DNAT) &&
-	    nf_flow_nat_ip(flow, skb, thoff, dir) < 0)
+	if (nf_flow_nat_ip(flow, skb, thoff, dir) < 0)
 		return NF_DROP;
 
 	flow->timeout = (u32)jiffies + NF_FLOW_TIMEOUT;
@@ -471,8 +470,7 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
 	if (skb_try_make_writable(skb, sizeof(*ip6h)))
 		return NF_DROP;
 
-	if (flow->flags & (FLOW_OFFLOAD_SNAT | FLOW_OFFLOAD_DNAT) &&
-	    nf_flow_nat_ipv6(flow, skb, dir) < 0)
+	if (nf_flow_nat_ipv6(flow, skb, dir) < 0)
 		return NF_DROP;
 
 	flow->timeout = (u32)jiffies + NF_FLOW_TIMEOUT;
-- 
2.11.0