netdev - [PATCH net-next v2 2/7] netfilter: flowtable: fixup UDP timeout depending on ct state

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Message-ID: <20230113165548.2692720-3-vladbu@nvidia.com>
Date:   Fri, 13 Jan 2023 17:55:43 +0100
From:   Vlad Buslov <vladbu@...dia.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <pablo@...filter.org>
CC:     <netdev@...r.kernel.org>, <netfilter-devel@...r.kernel.org>,
        <jhs@...atatu.com>, <xiyou.wangcong@...il.com>, <jiri@...nulli.us>,
        <ozsh@...dia.com>, <marcelo.leitner@...il.com>,
        <simon.horman@...igine.com>, Vlad Buslov <vladbu@...dia.com>
Subject: [PATCH net-next v2 2/7] netfilter: flowtable: fixup UDP timeout depending on ct state

Currently flow_offload_fixup_ct() function assumes that only replied UDP
connections can be offloaded and hardcodes UDP_CT_REPLIED timeout value. To
enable UDP NEW connection offload in following patches extract the actual
connections state from ct->status and set the timeout according to it.

Signed-off-by: Vlad Buslov <vladbu@...dia.com>
---
 net/netfilter/nf_flow_table_core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
index 81c26a96c30b..04bd0ed4d2ae 100644
--- a/net/netfilter/nf_flow_table_core.c
+++ b/net/netfilter/nf_flow_table_core.c
@@ -193,8 +193,11 @@ static void flow_offload_fixup_ct(struct nf_conn *ct)
 		timeout -= tn->offload_timeout;
 	} else if (l4num == IPPROTO_UDP) {
 		struct nf_udp_net *tn = nf_udp_pernet(net);
+		enum udp_conntrack state =
+			test_bit(IPS_SEEN_REPLY_BIT, &ct->status) ?
+			UDP_CT_REPLIED : UDP_CT_UNREPLIED;
 
-		timeout = tn->timeouts[UDP_CT_REPLIED];
+		timeout = tn->timeouts[state];
 		timeout -= tn->offload_timeout;
 	} else {
 		return;
-- 
2.38.1