netdev - [PATCH net-next 2/5] openvswitch: return NF_ACCEPT when OVS_CT

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Date:   Tue, 15 Nov 2022 10:50:54 -0500
From:   Xin Long <lucien.xin@...il.com>
To:     network dev <netdev@...r.kernel.org>, dev@...nvswitch.org
Cc:     davem@...emloft.net, kuba@...nel.org,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Pravin B Shelar <pshelar@....org>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Florian Westphal <fw@...len.de>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Davide Caratti <dcaratti@...hat.com>,
        Eelco Chaudron <echaudro@...hat.com>,
        Aaron Conole <aconole@...hat.com>
Subject: [PATCH net-next 2/5] openvswitch: return NF_ACCEPT when OVS_CT_NAT is net set in info nat

Either OVS_CT_SRC_NAT or OVS_CT_DST_NAT is set, OVS_CT_NAT must be
set in info->nat. Thus, if OVS_CT_NAT is not set in info->nat, it
will definitely not do NAT but returns NF_ACCEPT in ovs_ct_nat().

This patch changes nothing funcational but only makes this return
earlier in ovs_ct_nat() to keep consistent with TC's processing
in tcf_ct_act_nat().

Signed-off-by: Xin Long <lucien.xin@...il.com>
---
 net/openvswitch/conntrack.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c
index 4c5e5a6475af..cc643a556ea1 100644
--- a/net/openvswitch/conntrack.c
+++ b/net/openvswitch/conntrack.c
@@ -816,6 +816,9 @@ static int ovs_ct_nat(struct net *net, struct sw_flow_key *key,
 	enum nf_nat_manip_type maniptype;
 	int err;
 
+	if (!(info->nat & OVS_CT_NAT))
+		return NF_ACCEPT;
+
 	/* Add NAT extension if not confirmed yet. */
 	if (!nf_ct_is_confirmed(ct) && !nf_ct_nat_ext_add(ct))
 		return NF_ACCEPT;   /* Can't NAT. */
@@ -825,8 +828,7 @@ static int ovs_ct_nat(struct net *net, struct sw_flow_key *key,
 	 * Make sure new expected connections (IP_CT_RELATED) are NATted only
 	 * when committing.
 	 */
-	if (info->nat & OVS_CT_NAT && ctinfo != IP_CT_NEW &&
-	    ct->status & IPS_NAT_MASK &&
+	if (ctinfo != IP_CT_NEW && ct->status & IPS_NAT_MASK &&
 	    (ctinfo != IP_CT_RELATED || info->commit)) {
 		/* NAT an established or related connection like before. */
 		if (CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY)
-- 
2.31.1