diff mbox series

[v4,net-next,05/14] tcp: reorganize SYN ECN code

Message ID 20241021215910.59767-6-chia-yu.chang@nokia-bell-labs.com (mailing list archive)
State New
Headers show
Series AccECN protocol preparation patch series | expand

Commit Message

Chia-Yu Chang (Nokia) Oct. 21, 2024, 9:59 p.m. UTC 
From: Ilpo Järvinen <ij@kernel.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@kernel.org>
Signed-off-by: Chia-Yu Chang <chia-yu.chang@nokia-bell-labs.com>
---
 net/ipv4/tcp_output.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 45cb67c635be..64d47c18255f 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;
 	}
 }