This series includes several changes to the MPTCP RX path. The main goals are improving the RX performances, and increase the long term maintainability.
Some changes reflects recent(ish) improvements introduced in the TCP stack: patch 1, 2 and 3 are the MPTCP counter part of SKB deferral free and auto-tuning improvements. Note that patch 3 could possibly fix additional issues, and overall such patch should protect from similar issues to arise in the future. Patches 4-7 are aimed at introducing the socket backlog usage which will be done in a later series to process the packets received by the different subflows while the msk socket is owned. Patch 8 is not related to the RX path, but it contains additional tests for new features recently introduced in net-next. Signed-off-by: Matthieu Baerts (NGI0) <[email protected]> --- Notes: - Sorry for sending this series that late, we had quite a few patches to upstream during this cycle. This is the last batch, and it has been heavily tested the last 2 weeks. - If there are some issues with some patches, but not with 1-3, it would be nice, if possible, if these 3 first patches can be accepted, to reduce the recently introduced gap with TCP. - Patches can be grouped like this if needed: 1-3, 4-5, 6-7, 8. 6-7 are preparing the ground for future on-going work, they can be dropped if there are issues with them. --- Matthieu Baerts (NGI0) (1): selftests: mptcp: join: validate new laminar endp Paolo Abeni (7): mptcp: leverage skb deferral free tcp: make tcp_rcvbuf_grow() accessible to mptcp code mptcp: rcvbuf auto-tuning improvement mptcp: introduce the mptcp_init_skb helper mptcp: remove unneeded mptcp_move_skb() mptcp: factor out a basic skb coalesce helper mptcp: minor move_skbs_to_msk() cleanup include/net/tcp.h | 1 + net/ipv4/tcp_input.c | 2 +- net/mptcp/protocol.c | 187 ++++++++++++------------ net/mptcp/protocol.h | 4 +- tools/testing/selftests/net/mptcp/mptcp_join.sh | 69 +++++++++ tools/testing/selftests/net/mptcp/pm_nl_ctl.c | 9 ++ 6 files changed, 177 insertions(+), 95 deletions(-) --- base-commit: 1493c18fe8696bfc758a97130a485fc4e08387f5 change-id: 20250927-net-next-mptcp-rcv-path-imp-192d8c24c9c7 Best regards, -- Matthieu Baerts (NGI0) <[email protected]>
