AccECN protocol preparation patch series

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

Hello,

Please find the v7 

v7 (03-Mar-2025)
- Move 2 new patches added in v6 to the next AccECN patch series

v6 (27-Dec-2024)
- Avoid removing removing the potential CA_ACK_WIN_UPDATE in ack_ev_flags of patch #1 (Eric Dumazet <edumazet@google.com>)
- Add reviewed-by tag in patches #2, #3, #4, #5, #6, #7, #8, #12, #14
- Foloiwng 2 new pathces are added after patch #9 (Patch that adds SKB_GSO_TCP_ACCECN)
  * New patch #10 to replace exisiting SKB_GSO_TCP_ECN with SKB_GSO_TCP_ACCECN in the driver to avoid CWR flag corruption
  * New patch #11 adds AccECN for virtio by adding new negotiation flag (VIRTIO_NET_F_HOST/GUEST_ACCECN) in feature handshake and translating Accurate ECN GSO flag between virtio_net_hdr (VIRTIO_NET_HDR_GSO_ACCECN) and skb header (SKB_GSO_TCP_ACCECN)
- Add detailed changelog and comments in #13 (Eric Dumazet <edumazet@google.com>)
- Move patch #14 to the next AccECN patch series (Eric Dumazet <edumazet@google.com>)

v5 (5-Nov-2024)
- Add helper function "tcp_flags_ntohs" to preserve last 2 bytes of TCP flags of patch #4 (Paolo Abeni <pabeni@redhat.com>)
- Fix reverse X-max tree order of patches #4, #11 (Paolo Abeni <pabeni@redhat.com>)
- Rename variable "delta" as "timestamp_delta" of patch #2 fo clariety
- Remove patch #14 in this series (Paolo Abeni <pabeni@redhat.com>, Joel Granados <joel.granados@kernel.org>)

v4 (21-Oct-2024)
- Fix line length warning of patches #2, #4, #8, #10, #11, #14
- Fix spaces preferred around '|' (ctx:VxV) warning of patch #7
- Add missing CC'ed of patches #4, #12, #14

v3 (19-Oct-2024)
- Fix build error in v2

v2 (18-Oct-2024)
- Fix warning caused by NETIF_F_GSO_ACCECN_BIT in patch #9 (Jakub Kicinski <kuba@kernel.org>)

The full patch series can be found in
https://github.com/L4STeam/linux-net-next/commits/upstrea...

The Accurate ECN draft can be found in
https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-acc...

Best regards,
Chia-Yu

Chia-Yu Chang (1):
  tcp: use BIT() macro in include/net/tcp.h

Ilpo Järvinen (11):
  tcp: reorganize tcp_in_ack_event() and tcp_count_delivered()
  tcp: create FLAG_TS_PROGRESS
  tcp: extend TCP flags to allow AE bit/ACE field
  tcp: reorganize SYN ECN code
  tcp: rework {__,}tcp_ecn_check_ce() -> tcp_data_ecn_check()
  tcp: helpers for ECN mode handling
  gso: AccECN support
  gro: prevent ACE field corruption & better AccECN handling
  tcp: AccECN support to tcp_add_backlog
  tcp: add new TCP_TW_ACK_OOW state and allow ECN bits in TOS
  tcp: Pass flags to __tcp_send_ack

 include/linux/netdev_features.h |   8 ++-
 include/linux/netdevice.h       |   2 +
 include/linux/skbuff.h          |   2 +
 include/net/tcp.h               |  81 ++++++++++++++++-----
 include/uapi/linux/tcp.h        |   9 ++-
 net/ethtool/common.c            |   1 +
 net/ipv4/bpf_tcp_ca.c           |   2 +-
 net/ipv4/ip_output.c            |   3 +-
 net/ipv4/tcp.c                  |   2 +-
 net/ipv4/tcp_dctcp.c            |   2 +-
 net/ipv4/tcp_dctcp.h            |   2 +-
 net/ipv4/tcp_input.c            | 120 +++++++++++++++++++-------------
 net/ipv4/tcp_ipv4.c             |  34 ++++++---
 net/ipv4/tcp_minisocks.c        |   6 +-
 net/ipv4/tcp_offload.c          |  10 ++-
 net/ipv4/tcp_output.c           |  23 +++---
 net/ipv6/tcp_ipv6.c             |  26 ++++---
 net/netfilter/nf_log_syslog.c   |   8 ++-
 18 files changed, 228 insertions(+), 113 deletions(-)

-- 
2.34.1