netdev - [PATCH v3 net-next 0/3] ECN offload handling for AccECN series

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Message-Id: <20260203161126.2436-1-chia-yu.chang@nokia-bell-labs.com>
Date: Tue,  3 Feb 2026 17:11:23 +0100
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 0/3] ECN offload handling for AccECN series

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

Hello,

Please find the v3 ECN offload handling for AccECN patch series. It aims
to avoid potential CWR flag corruption due to RFC3168 ECN offload, because
this flag is part of ACE signal used for Accurate ECN protocol (RFC9768).

This corresponds to discussions in virtio mailing list:
https://lore.kernel.org/all/20250814120118.81787-1-chia-yu.chang@nokia-bell-labs.com/
And it was suggested to clarify documents of SKB_GSO_TCP_ECN and SKB_GSO_TCP_ACCECN first.

Best regards,
Chia-Yu

---
v3:
- Update commit messages for clarity (Michael S. Tsirkin <mst@...hat.com>)
- Update commit title for clarity (Michael S. Tsirkin <mst@...hat.com>)
- Update cover letter to include discussion in virtio mailing list (Michael S. Tsirkin <mst@...hat.com>)

v2:
- Replace VIRTIO_NET_HDR_GSO_ECN with VIRTIO_NET_HDR_GSO_ECN_FLAGS

---
Chia-Yu Chang (3):
  net: update comments for SKB_GSO_TCP_ECN and SKB_GSO_TCP_ACCECN
  net: hns3/mls5e: fix CWR handling in drivers to preserve ACE signal
  virtio_net: add AccECN feature negotiation and correct ECN flag
    handling

 .../net/ethernet/hisilicon/hns3/hns3_enet.c    |  2 +-
 .../net/ethernet/mellanox/mlx5/core/en_rx.c    |  4 ++--
 drivers/net/virtio_net.c                       | 14 +++++++++++---
 drivers/vdpa/pds/debugfs.c                     |  6 ++++++
 include/linux/skbuff.h                         | 15 ++++++++++++++-
 include/linux/virtio_net.h                     | 18 +++++++++++-------
 include/uapi/linux/virtio_net.h                |  5 +++++
 7 files changed, 50 insertions(+), 14 deletions(-)

-- 
2.34.1