2024-12-10 06:44:25 +03:00
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From 1fe2a421fbf80580ad76f528c6489633667e5851 Mon Sep 17 00:00:00 2001
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2024-10-29 05:12:06 +03:00
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From: Neal Cardwell <ncardwell@google.com>
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Date: Mon, 19 Nov 2018 13:48:36 -0500
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Subject: [PATCH 05/19] net-tcp_bbr: v2: export FLAG_ECE in rate_sample.is_ece
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For understanding the relationship between inflight and ECN signals,
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to try to find the highest inflight value that has acceptable levels
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ECN marking.
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Effort: net-tcp_bbr
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Origin-9xx-SHA1: 3eba998f2898541406c2666781182200934965a8
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Change-Id: I3a964e04cee83e11649a54507043d2dfe769a3b3
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Signed-off-by: Alexandre Frade <kernel@xanmod.org>
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---
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include/net/tcp.h | 1 +
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net/ipv4/tcp_input.c | 1 +
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2 files changed, 2 insertions(+)
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--- a/include/net/tcp.h
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+++ b/include/net/tcp.h
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2024-12-10 06:44:25 +03:00
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@@ -1158,6 +1158,7 @@ struct rate_sample {
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2024-10-29 05:12:06 +03:00
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bool is_app_limited; /* is sample from packet with bubble in pipe? */
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bool is_retrans; /* is sample from retransmission? */
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bool is_ack_delayed; /* is this (likely) a delayed ACK? */
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+ bool is_ece; /* did this ACK have ECN marked? */
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};
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struct tcp_congestion_ops {
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--- a/net/ipv4/tcp_input.c
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+++ b/net/ipv4/tcp_input.c
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@@ -4060,6 +4060,7 @@ static int tcp_ack(struct sock *sk, cons
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delivered = tcp_newly_delivered(sk, delivered, flag);
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lost = tp->lost - lost; /* freshly marked lost */
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rs.is_ack_delayed = !!(flag & FLAG_ACK_MAYBE_DELAYED);
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+ rs.is_ece = !!(flag & FLAG_ECE);
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tcp_rate_gen(sk, delivered, lost, is_sack_reneg, sack_state.rate);
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tcp_cong_control(sk, ack, delivered, flag, sack_state.rate);
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tcp_xmit_recovery(sk, rexmit);
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