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smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Gz3M+GMp; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Gz3M+GMp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2DCDC433F1 for ; Thu, 28 Mar 2024 18:31:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711650702; bh=mplz6gTIdWw+hlGqKp+b5cD4iUm9J22kLInIO1Tl0lA=; h=Date:From:To:Subject:From; b=Gz3M+GMp97Xrd/zFq9hB1+VeAMj+QRqRMF5sN+RHZothjHkCDgQF9dCV82Hm56m1I tWl6jtiI1KQ+9aY63dctwOJHhSS7LOyK/mTKdyitDQi38AfIksjeBUm1eapgXz+66y vbbDd4nS9ahUUiVz6bRkMLR/H6RI7xmJoF2xw+PH9UBJILOicl/E3PnGwWgOsDJKVi AXHLJl8J5MSlGSuB4pSRdJn/iWdhv/BT3x3iBktY1epkIYcbOEK1mGlcVLkDq53gLI 4O0W5XmaQSzDWUm1O7HBvtJa4q7DaYPZC/G1zZ49+DUDMWWPCEGYLOzJOIo8x+dW6C zzH/pQsWKp4gw== Message-ID: <149da177-014a-4c4b-984b-d2aff74edf19@kernel.org> Date: Thu, 28 Mar 2024 19:31:39 +0100 Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta Content-Language: en-GB From: Matthieu Baerts Autocrypt: addr=matttbe@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit Hello everyone, This week, we had our new meeting with Mat (Cruise), Paolo and Davide (Red Hat), and myself (NGI0 Core). Thanks again for this new good meeting! Here are the minutes of the meeting: Accepted patches: - The list of accepted patches can be seen on PatchWork: https://patchwork.kernel.org/project/mptcp/list/?state=3 netdev (if mptcp ML is in cc) (by: Geliang Tang): 13601195: selftests/bpf: Use start_server in bpf_tcp_ca: - Submitter: Geliang Tang - URL: https://patchwork.kernel.org/project/mptcp/patch/9926a79118db27dd6d91c4854db011c599cabd0e.1711331517.git.tanggeliang@kylinos.cn/ - For the BPF tree our repo (by: Davide Caratti): 13597481: [mptcp-net,v4] mptcp: don't account accept() of non-MPC client as fallback to TCP: - Submitter: Davide Caratti - URL: https://patchwork.kernel.org/project/mptcp/patch/054bcffde84b87f588f788b30dce2b702a532f64.1710923679.git.dcaratti@redhat.com/ Pending patches: - The list of pending patches can be seen on PatchWork: https://patchwork.kernel.org/project/mptcp/list/?state=* netdev (if mptcp ML is in cc) (by: Geliang Tang): 13603810: [bpf-next,v4,1/2] selftests/bpf: Use connect_fd_to_fd in bpf_tcp_ca 13603811: [bpf-next,v4,2/2] selftests/bpf: Drop settimeo in do_test: - Series: Use start_server and connect_fd_to_fd - Submitter: Geliang Tang - URL: https://patchwork.kernel.org/project/mptcp/list/?series=838305&state=*&archive=both - For the BPF tree our repo (by: Geliang Tang, Matthieu Baerts): 12282219: [RESEND,RFC,2/4] tcp: move selected mptcp helpers to tcp.h/mptcp.h 12282221: [RESEND,RFC,4/4] tcp: parse tcp options contained in reset packets: 12282223: [RESEND,RFC,mptpcp-next] mptcp: add ooo prune support: 12282225: [RESEND,1/5] tcp: make two mptcp helpers available to tcp stack 12282227: [RESEND,5/5] mptcp: send fastclose if userspace closes socket with unread data: 13070467: [mptcp-next,v4,1/2] mptcp: update mptcp_push_release 13070468: [mptcp-next,v4,2/2] mptcp: retrans for redundant sends: - State: Changes requested - Series: BPF redundant scheduler, part 3 - Submitter: Geliang Tang - URL: https://patchwork.kernel.org/project/mptcp/list/?series=703615&state=*&archive=both - status is the same 13305089: [mptcp-next,1/6] mptcp: sockopt: move tcp_inq code to a dedicated function 13305091: [mptcp-next,2/6] mptcp: sockopt: update supported list 13305093: [mptcp-next,3/6] mptcp: sockopt: get val in a generic way 13305090: [mptcp-next,4/6] mptcp: sockopt: add missing getsockopt() options 13305094: [mptcp-next,5/6] mptcp: sockopt: set val in a generic way 13305092: [mptcp-next,6/6] mptcp: sockopt: support IP_TTL & IPV6_UNICAST_HOPS: - State: Changes requested - Series: mptcp: sockopt: uniform code to get/set values - Submitter: Matthieu Baerts - URL: https://patchwork.kernel.org/project/mptcp/list/?series=763505&state=*&archive=both - status is the same 13566825: [mptcp-next,v2,6/7] mptcp: add check_id for lookup_anno_list_by_saddr 13566826: [mptcp-next,v2,7/7] selftests: mptcp: flush userspace addrs list: - State: Changes requested - Series: some cleanups - Submitter: Geliang Tang - URL: https://patchwork.kernel.org/project/mptcp/list/?series=828557&state=*&archive=both - 7/7: we can probably drop it - TODO: Matth: ask Geliang what to do with them? → Done 13583230: [RFC] mptcp: react scheduler when subflow events pop up: - State: Changes requested - Submitter: Geliang Tang - URL: https://patchwork.kernel.org/project/mptcp/patch/433320c3a9db77bea53a34fc9c43a3c7e3320399.1709693691.git.tanggeliang@kylinos.cn/ - status is the same - would be good to have a plan, no need to go into the details (or not too much) - we can organise a meeting at a different time to discuss it, it will be easier for Geliang 13595081: [mptcp-next,1/3] mptcp: add last time fields in mptcp_sock 13595082: [mptcp-next,2/3] mptcp: add last time fields in mptcp_info 13595083: [mptcp-next,3/3] selftests: mptcp: add last time actions tests: - State: Changes requested - Series: display "last time" actions info - Submitter: Geliang Tang - URL: https://patchwork.kernel.org/project/mptcp/list/?series=836000&state=*&archive=both - Mat did a review, a few things to change 13605983: [mptcp-next,v4,01/11] Squash to "selftests/bpf: Add bpf scheduler test" fix 13605984: [mptcp-next,v4,02/11] selftests/bpf: Add RUN_MPTCP_TEST macro 13605985: [mptcp-next,v4,03/11] selftests/bpf: Add mptcp subflow example 13605986: [mptcp-next,v4,04/11] selftests/bpf: Add mptcp subflow subtest 13605987: [mptcp-next,v4,05/11] Squash to "selftests/bpf: Add bpf scheduler test" - cleanups 13605988: [mptcp-next,v4,06/11] Squash to "selftests/bpf: Add bpf scheduler test" - add send_data_and_verify 13605989: [mptcp-next,v4,07/11] Squash to "selftests/bpf: Add bpf_first test" 13605990: [mptcp-next,v4,08/11] Squash to "selftests/bpf: Add bpf_bkup test" 13605991: [mptcp-next,v4,09/11] Squash to "selftests/bpf: Add bpf_rr test" 13605992: [mptcp-next,v4,10/11] Squash to "selftests/bpf: Add bpf_red test" 13605993: [mptcp-next,v4,11/11] Squash to "selftests/bpf: Add bpf_burst test": - State: New - Series: setsockopt per subflow: BPF - Submitter: Geliang Tang - URL: https://patchwork.kernel.org/project/mptcp/list/?series=838784&state=*&archive=both - Matth can look at it: TODO Issues on Github: https://github.com/multipath-tcp/mptcp_net-next/issues/ Recently opened (latest from the last meeting: 480): / Bugs (opened, flagged as "bug" and assigned) 477 Client: fallback to TCP after X MPC [bug] @matttbe: - that seems important if MPTCP is used by default on the client side - but probably hard to have it backported - important to have a sysctl to control the blackhole + an easy way to check if this feature is available - fallback cannot be too "optimised"/smart because the userspace can already interract with the MPTCP socket at that point - we can change the ULP ops - to do something smart, the MPTCP socket should inherit from the TCP one: waste of memory, etc. just for the client side and to support fallbacks, probably not worth it. - Matth will look at that 445 MPTCP Info counters: start seq numbers ones from 0 [bug] @geliangtang 403 userspace pm: only remove entry from `local_addr_list` when sending a `REMOVE_ADDR` [bug] [pm] @geliangtang 343 scheduler: react when subflow-level events pop up (ACK/RTO) [bug] [sched] @geliangtang Bugs (opened and flagged as "bug" and not assigned) 476 packetdrill: coalescing feature doesn't take into account MPTCP options [bug] [packetdrill] 475 `simult_flows`: unbalanced bwidth tests are unstable [bug] [selftests] 463 syzkaller: INFO: task hung in `lock_sock_nested` [bug] [syzkaller] 439 mptcp vs net.ipv4.tcp_shrink_window [bug] 416 No new subflow when removing an endpoint and adding a new one [bug] 336 Issues with BPF packet scheduler [bug] [sched] [bpf] 325 selftests: `mptcp_join`: test 18 `signal addresses race test` is sometimes failing [bug] [selftests] 324 selftests: `mptcp_join`: tests `fastclose test` & `fastclose server test` are sometimes failing [bug] [selftests] 318 selftests: `mptcp_connect.sh` sometimes fails when validating SYN cookies [bug] [selftests] 315 Issues with backup flow [bug] In Progress (opened, new feature and assigned) 446 MPTCP Info counters: display "last time" actions info [enhancement] @geliangtang 383 TCP_KEEPIDLE, TCP_KEEPINTVL, TCP_KEEPCNT are not implemented in mptcp_setsockopt_sol_tcp [enhancement] @matttbe 353 sockopt: uniform code to get/set values [enhancement] @matttbe 349 scheduler: (un)mark a subflow as "stale" [enhancement] [sched] @geliangtang 296 Support IP_TTL & IPV6_UNICAST_HOPS [enhancement] @matttbe 234 Packetdrill: Support MPC+DATA+checksum error [enhancement] [packetdrill] @spoorva 167 packetdrill: add coverage for RM_ADDR [enhancement] [packetdrill] @dcaratti 76 [gs]etsockopt per subflow: BPF [enhancement] [bpf] @geliangtang 75 BPF: packet scheduler [enhancement] [sched] [bpf] @geliangtang 74 BPF: path manager [enhancement] [pm] [bpf] @geliangtang Assigned Questions (opened, questions and assigned) None. Open questions (opened, questions and not assigned) 479 when using openvpn in tcp with dco, we have a bug [question] 459 Are the endpoint flags `signal` and `subflow` meant to be exclusive? or how to get MPTCP to work for both directions? [question] 452 mptcp causes the network to become very slow [question] 412 shadowsocks-libev not working, need guidance for PM configuration [question] 411 Problem with IPROTO [question] For later (opened and not assigned assigned) 480 MPTCP and KTLS support [enhancement] 469 CI: add code coverage support [enhancement] [CI] 467 Scheduler: add redundant scheduler support in BPF [enhancement] [sched] 462 selftests: print (and set?) random seed [enhancement] [selftests] 461 Protocol: extend Data-Level Length field [enhancement] [protocol] 448 Allow sending ADD_ADDR IPv6 with port-number if TCP-timestamps are enabled [enhancement] 441 optimize established options generation [enhancement] 440 in-kernel PM: re-establish subflows after "network" errors [enhancement] [pm] 426 selftests: validate listener sockets with multiple accepts [enhancement] [selftests] 397 Doc and guidance for users [enhancement] [documentation] 396 ci: periodically run selftests from the export branch on stable kernels [enhancement] [selftests] 394 selftests: ability to track subtests [enhancement] [selftests] 389 packetdrill: increase coverage for "early `close()`" cases [enhancement] [packetdrill] 350 scheduler: API changes (tasks) [enhancement] [sched] 348 scheduler: frequently probe "stale" subflow with reinjected data [enhancement] [sched] 345 scheduler: "penalise" some subflows by sending less than their cwnd [enhancement] [sched] 344 scheduler: new callback to initiate optimisations [enhancement] [sched] 337 in-kernel PM: listen socket: support "behind a NAT" use case [enhancement] [pm] 335 Server to Client subflows: option to allow joining the initial address and port [enhancement] [pm] 334 PM: in-kernel: send >1 ADD_ADDR before the establishment of a new subflow [enhancement] [pm] 333 New MIBs to help understanding issues when PM cannot create new subflows [enhancement] [pm] 332 scheduler: implement a "opportunistic retransmission" [enhancement] [sched] 298 CG Memory accounting for passive MPTCP socket [enhancement] 289 mptcp: audit comments for non inclusive language [enhancement] 273 Packetdrill: test outgoing MP_FASTCLOSE [enhancement] [packetdrill] 266 Packetdrill: add MP_FAIL coverage [packetdrill] 236 Review supported sockopts list [enhancement] 222 Netlink event API: add SUBFLOW_CREATED event [enhancement] 215 TCP Urgent pointer and MPTCP [enhancement] 213 add MPTCP man page [enhancement] 208 better handing of ssk memory pressure in the TX path [enhancement] 202 Add sendmsg support for ancillary data [enhancement] 197 more mibs needed [enhancement] 180 Get an update when MPTCP fall back to TCP [enhancement] 177 improve retransmit subflow selection [enhancement] 169 packetdrill: add coverage for ADD_ADDR and MP_JOIN on a different port [enhancement] [packetdrill] 150 remove completely workqueue usage [enhancement] 141 avoid acquiring mptcp_data_lock() twice in the receive path [enhancement] 133 PM: Closing the MPTCP connection when last subflow is not the initial one and its IP address is removed [enhancement] 128 When the last subflow is closed without DATA_FIN and msk Established, close msk (after a timeout) [enhancement] 78 notify the application (userspace) when a subflow is added/removed [enhancement] 77 [gs]etsockopt: forward to new/existing SF [enhancement] 57 After a few attempts of failed MPTCP, directly fallback to TCP for new connections [enhancement] 43 [syzkaller] Change syzkaller to exercise MPTCP inet_diag interface [enhancement] [syzkaller] 41 reduce indirect call usage [enhancement] 24 Revisit layout of struct mptcp_subflow_context [enhancement] Recently closed (since 2024-03-20) 478 A hypothesis [question] @geliangtang 473 CI: tracking: publish tests results to Kernel CI [enhancement] [CI] 449 `MPTcpExtMPCapableFallbackACK` - looks surprising [bug] @dcaratti FYI: Current Roadmap: - Bugs: https://github.com/multipath-tcp/mptcp_net-next/issues?q=is%3Aissue+is%3Aopen+label%3Abug - Current/Coming merge window (6.10): https://github.com/orgs/multipath-tcp/projects/8 - For later: https://github.com/orgs/multipath-tcp/projects/1 Patches to send to netdev: - Fixes for other trees: / - Fixes for -net: - [d77e1fabd2a3] selftests: mptcp: simult flows: re-adapt BW (Matthieu Baerts (NGI0)): - wait? see ticket #475 - [bf549689f799] selftests: mptcp: join: fix dev in check_endpoint (Geliang Tang) - [ef2cf0903681] mptcp: don't account accept() of non-MPC client as fallback to TCP (Davide Caratti): - can be sent: Matthieu: TODO - Fixes for net-next: / - Features for net-next: - [357aafce6700] selftests: mptcp: add tc check for check_tools (Geliang Tang) - [fafd042ca65d] selftests: mptcp: add ms units for tc-netem delay (Geliang Tang) - [1acf0b96bfc6] selftests: mptcp: export ip_mptcp to mptcp_lib (Geliang Tang) - [fe2ca44df599] selftests: mptcp: netlink: add 'limits' helpers (Geliang Tang) - [943b718a98b6] selftests: mptcp: add {get,format}_endpoint(s) helpers (Geliang Tang) - [a3a3980be5b0] selftests: mptcp: netlink: add change_address helper (Geliang Tang) - [9ff15866aee4] selftests: mptcp: join: update endpoint ops (Geliang Tang) - [c571d08983eb] selftests: mptcp: export pm_nl endpoint ops (Geliang Tang) - [87454fc58146] selftests: mptcp: use pm_nl endpoint ops (Geliang Tang) - [59e438967a6e] selftests: mptcp: ip_mptcp option for more scripts (Geliang Tang) - [fb4885b9d787] selftests: mptcp: netlink: drop disable=SC2086 (Geliang Tang): - can be sent, but depends on 'selftests: mptcp: join: fix dev in check_endpoint' → wait one more week - Features for net-next (next): / - Features for other trees: - [1e7d4453a1b8] mptcp: add sched_data helpers (Geliang Tang) - [6355bc241440] bpf: Add bpf_mptcp_sched_ops (Geliang Tang) - [c99425a72fc2] bpf: Add bpf_mptcp_sched_kfunc_set (Geliang Tang) - [2c0f62f2513d] selftests/bpf: Add mptcp sched structs (Geliang Tang) - [9f4027bfffa8] selftests/bpf: Add bpf scheduler test (Geliang Tang) - [caa604b19b49] selftests/bpf: Add bpf_first scheduler (Geliang Tang) - [494a5ac68bfd] selftests/bpf: Add bpf_first test (Geliang Tang) - [4d475fbbcaae] selftests/bpf: Add bpf_bkup scheduler (Geliang Tang) - [87e4bb8394c5] selftests/bpf: Add bpf_bkup test (Geliang Tang) - [56a41da85c63] selftests/bpf: Add bpf_rr scheduler (Geliang Tang) - [1d558e623fee] selftests/bpf: Add bpf_rr test (Geliang Tang) - [5c9488418a02] selftests/bpf: Add bpf_red scheduler (Geliang Tang) - [a765a991a016] selftests/bpf: Add bpf_red test (Geliang Tang) - [44ecbd95a992] bpf: Export more bpf_burst related functions (Geliang Tang) - [cadaaf9019c8] selftests/bpf: Add bpf_burst scheduler (Geliang Tang) - [74200af950de] selftests/bpf: Add bpf_burst test (Geliang Tang): - wait for new sched API Extra tests: - news about Syzkaller? (Christoph): - / - news about interop with mptcp.org/other stacks? (?): - / - packetdrill (Davide): - We are now tracking all individual tests with TAP, not just per directory https://github.com/multipath-tcp/packetdrill/pull/135/ - Patchew (Davide): - / - CI (Matth): - https://ci-results.mptcp.dev/flakes.html - quite stable for the moment Next meeting: - Next one on *Wednesday*, the 3rd of April. - /!\ at a different UTC time! - 1*7*:30 UTC (*8*.30am PDT, 5.30pm CE*S*T, 1*1*.30pm CST) - Still open to everyone! - https://annuel2.framapad.org/p/mptcp_upstreaming_20240403 Feel free to comment on these topics and suggest new ones for the next meeting! Talk to you on Wednesday, Matt -- Sponsored by the NGI0 Core fund.