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Message-Id: <20241105100647.117346-6-chia-yu.chang@nokia-bell-labs.com>
Date: Tue, 5 Nov 2024 11:06:39 +0100
From: chia-yu.chang@...ia-bell-labs.com
To: netdev@...r.kernel.org, dsahern@...il.com, davem@...emloft.net,
edumazet@...gle.com, dsahern@...nel.org, pabeni@...hat.com,
joel.granados@...nel.org, kuba@...nel.org, andrew+netdev@...n.ch,
horms@...nel.org, pablo@...filter.org, kadlec@...filter.org,
netfilter-devel@...r.kernel.org, coreteam@...filter.org, ij@...nel.org,
ncardwell@...gle.com, koen.de_schepper@...ia-bell-labs.com,
g.white@...leLabs.com, ingemar.s.johansson@...csson.com,
mirja.kuehlewind@...csson.com, cheshire@...le.com, rs.ietf@....at,
Jason_Livingood@...cast.com, vidhi_goel@...le.com
Cc: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>
Subject: [PATCH v5 net-next 05/13] tcp: reorganize SYN ECN code
From: Ilpo Järvinen <ij@...nel.org>
Prepare for AccECN that needs to have access here on IP ECN
field value which is only available after INET_ECN_xmit().
No functional changes.
Signed-off-by: Ilpo Järvinen <ij@...nel.org>
Signed-off-by: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>
---
net/ipv4/tcp_output.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 1b2f4a2e7332..9c47b46aa14d 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -347,10 +347,11 @@ static void tcp_ecn_send_syn(struct sock *sk, struct sk_buff *skb)
tp->ecn_flags = 0;
if (use_ecn) {
- TCP_SKB_CB(skb)->tcp_flags |= TCPHDR_ECE | TCPHDR_CWR;
- tp->ecn_flags = TCP_ECN_OK;
if (tcp_ca_needs_ecn(sk) || bpf_needs_ecn)
INET_ECN_xmit(sk);
+
+ TCP_SKB_CB(skb)->tcp_flags |= TCPHDR_ECE | TCPHDR_CWR;
+ tp->ecn_flags = TCP_ECN_OK;
}
}
--
2.34.1
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