netdev - [PATCH v3 net-next 00/12] AccECN protocol case handling series

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Message-Id: <20250927084803.17784-1-chia-yu.chang@nokia-bell-labs.com>
Date: Sat, 27 Sep 2025 10:47:51 +0200
From: chia-yu.chang@...ia-bell-labs.com
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Cc: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>
Subject: [PATCH v3 net-next 00/12] AccECN protocol case handling series

From: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>

Hello,

Plesae find the v2 AccECN case handling patch series, which covers
several excpetional case handling of Accurate ECN spec (RFC9768),
adds new identifiers to be used by CC modules, adds ecn_delta into
rate_sample, and keeps the ACE counter for computation, etc.

This patch series is part of the full AccECN patch series, which is available at
https://github.com/L4STeam/linux-net-next/commits/upstream_l4steam/

Best regards,
Chia-Yu

---
v3:
- Add additional min() check if pkts_acked_ewma is not initialized in #1.
- Change TCP_CONG_WANTS_ECT_1 into individual flag add helper function INET_ECN_xmit_wants_ect_1() in #3.
- Add empty line between variable declarations and code in #4.
- Update commit message to fix old AccECN commits in #5.
- Remove unnecessary brackets in #10.
- Move patch #3 in v2 to a later Prague patch serise and remove patch #13 in v2.

---
Chia-Yu Chang (10):
  tcp: L4S ECT(1) identifier and NEEDS_ACCECN for CC modules
  tcp: disable RFC3168 fallback identifier for CC modules
  tcp: accecn: handle unexpected AccECN negotiation feedback
  tcp: accecn: retransmit downgraded SYN in AccECN negotiation
  tcp: move increment of num_retrans
  tcp: accecn: retransmit SYN/ACK without AccECN option or non-AccECN
    SYN/ACK
  tcp: accecn: unset ECT if receive or send ACE=0 in AccECN negotiaion
  tcp: accecn: fallback outgoing half link to non-AccECN
  tcp: accecn: verify ACE counter in 1st ACK after AccECN negotiation
  tcp: accecn: enable AccECN

Ilpo Järvinen (2):
  tcp: try to avoid safer when ACKs are thinned
  gro: flushing when CWR is set negatively affects AccECN

 .../networking/net_cachelines/tcp_sock.rst    |  1 +
 include/linux/tcp.h                           |  1 +
 include/net/inet_ecn.h                        | 20 ++++-
 include/net/tcp.h                             | 32 ++++++-
 include/net/tcp_ecn.h                         | 90 +++++++++++++------
 net/ipv4/sysctl_net_ipv4.c                    |  2 +-
 net/ipv4/tcp.c                                |  2 +
 net/ipv4/tcp_cong.c                           | 10 ++-
 net/ipv4/tcp_input.c                          | 49 ++++++++--
 net/ipv4/tcp_minisocks.c                      | 40 ++++++---
 net/ipv4/tcp_offload.c                        |  3 +-
 net/ipv4/tcp_output.c                         | 35 +++++---
 12 files changed, 218 insertions(+), 67 deletions(-)

-- 
2.34.1