From: Chia-Yu Chang chia-yu.chang@nokia-bell-labs.com
Hello,
Plesae find the v5 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
--- v5: - Move previous #11 in v4 in latter patch after discussion with RFC author. - Add #3 to update the comments for SKB_GSO_TCP_ECN and SKB_GSO_TCP_ACCECN. (Parav Pandit parav@nvidia.com) - Add gro self-test for TCP CWR flag in #4. (Eric Dumazet edumazet@google.com) - Add fixes: tag into #7 (Paolo Abeni pabeni@redhat.com) - Update commit message of #8 and if condition check (Paolo Abeni pabeni@redhat.com) - Add empty line between variable declarations and code in #13 (Paolo Abeni pabeni@redhat.com)
v4: - Add previous #13 in v2 back after dicussion with the RFC author. - Add TCP_ACCECN_OPTION_PERSIST to tcp_ecn_option sysctl to ignore AccECN fallback policy on sending AccECN option.
v3: - Add additional min() check if pkts_acked_ewma is not initialized in #1. (Paolo Abeni pabeni@redhat.com) - Change TCP_CONG_WANTS_ECT_1 into individual flag add helper function INET_ECN_xmit_wants_ect_1() in #3. (Paolo Abeni pabeni@redhat.com) - Add empty line between variable declarations and code in #4. (Paolo Abeni pabeni@redhat.com) - Update commit message to fix old AccECN commits in #5. (Paolo Abeni pabeni@redhat.com) - Remove unnecessary brackets in #10. (Paolo Abeni pabeni@redhat.com) - Move patch #3 in v2 to a later Prague patch serise and remove patch #13 in v2. (Paolo Abeni pabeni@redhat.com)
--- Chia-Yu Chang (12): net: update commnets for SKB_GSO_TCP_ECN and SKB_GSO_TCP_ACCECN selftests/net: gro: add self-test for TCP CWR flag 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: detect loss ACK w/ AccECN option and add TCP_ACCECN_OPTION_PERSIST 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
Documentation/networking/ip-sysctl.rst | 4 +- .../networking/net_cachelines/tcp_sock.rst | 1 + include/linux/skbuff.h | 13 ++- include/linux/tcp.h | 4 +- include/net/inet_ecn.h | 20 +++- include/net/tcp.h | 32 ++++++- include/net/tcp_ecn.h | 92 ++++++++++++++----- net/ipv4/sysctl_net_ipv4.c | 4 +- net/ipv4/tcp.c | 2 + net/ipv4/tcp_cong.c | 10 +- net/ipv4/tcp_input.c | 37 +++++++- net/ipv4/tcp_minisocks.c | 40 +++++--- net/ipv4/tcp_offload.c | 3 +- net/ipv4/tcp_output.c | 42 ++++++--- tools/testing/selftests/net/gro.c | 80 +++++++++++----- 15 files changed, 294 insertions(+), 90 deletions(-)