From: Chia-Yu Chang chia-yu.chang@nokia-bell-labs.com
Hello,
Plesae find the v7 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
--- v7: - Update comments in #3 (Paolo Abeni pabeni@redhat.com) - Update comments and use synack_type TCP_SYNACK_RETRANS and num_timeout in #9. (Paolo Abeni pabeni@redhat.com)
v6: - Update comment in #3 to highlight RX path is only used for virtio-net (Paolo Abeni pabeni@redhat.com) - Rename TCP_CONG_WANTS_ECT_1 to TCP_CONG_ECT_1_NEGOTIATION to distiguish from TCP_CONG_ECT_1_ESTABLISH (Paolo Abeni pabeni@redhat.com) - Move TCP_CONG_ECT_1_ESTABLISH in #6 to latter patch series (Paolo Abeni pabeni@redhat.com) - Add new synack_type instead of moving the increment of num_retran in #9 (Paolo Abeni pabeni@redhat.com) - Use new synack_type TCP_SYNACK_RETRANS and num_retrans for SYN/ACK retx fallbackk for AccECN in #10 (Paolo Abeni pabeni@redhat.com) - Do not cast const struct into non-const in #11, and set AccECN fail mode after tcp_rtx_synack() (Paolo Abeni pabeni@redhat.com)
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 (11): selftests/net: gro: add self-test for TCP CWR flag tcp: ECT_1_NEGOTIATION and NEEDS_ACCECN identifiers tcp: disable RFC3168 fallback identifier for CC modules tcp: accecn: handle unexpected AccECN negotiation feedback tcp: accecn: retransmit downgraded SYN in AccECN negotiation tcp: add TCP_SYNACK_RETRANS synack_type 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/tcp.h | 4 +- include/net/inet_ecn.h | 20 +++- include/net/tcp.h | 32 ++++++- include/net/tcp_ecn.h | 92 ++++++++++++++----- net/ipv4/inet_connection_sock.c | 4 + net/ipv4/sysctl_net_ipv4.c | 4 +- net/ipv4/tcp.c | 2 + net/ipv4/tcp_cong.c | 5 +- net/ipv4/tcp_input.c | 37 +++++++- net/ipv4/tcp_minisocks.c | 46 +++++++--- net/ipv4/tcp_offload.c | 3 +- net/ipv4/tcp_output.c | 32 ++++--- net/ipv4/tcp_timer.c | 3 + tools/testing/selftests/drivers/net/gro.c | 81 +++++++++++----- 16 files changed, 284 insertions(+), 86 deletions(-)