[Weekly meetings] MoM - 22nd of April 2026
Matthieu Baerts <[email protected]>
| Newsgroups | dev.linux.lists.mptcp |
|---|---|
| Organization | NGI0 Core |
| Message-ID | <[email protected]> |
Hello everyone,
A few weeks ago, we had a meeting with Mat (Cruise), 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: David CARLIER, Jiayuan Chen, Matthieu Baerts):
14512596: [net,v2] mptcp: fix slab-use-after-free in __inet_lookup_established:
- Submitter: Jiayuan Chen
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
14513952: [net,v2] Revert "mptcp: add needs_id for netlink appending addr":
- Submitter: Matthieu Baerts
- URL: https://patchwork.kernel.org/project/mptcp/patch/20260407-net-mptcp-revert-pm-needs-id-v2-1-7a25cbc324f8@kernel.org/
14513956: [net-next,v2,1/2] mptcp: better mptcp-level RTT estimator
14513957: [net-next,v2,2/2] mptcp: add receive queue awareness in tcp_rcv_space_adjust():
- Series: mptcp: autotune related improvement
- Submitter: Matthieu Baerts
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1078013&state=*&archive=both
14514689: [v4,net-next] net: use get_random_u{16,32,64}() where appropriate:
- Submitter: David CARLIER
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
our repo (by: Gang Yan):
14521024: [mptcp-net,v4,1/2] mptcp: sync the msk->sndbuf at accept() time
14521025: [mptcp-net,v4,2/2] selftests: mptcp: add a check for sndbuf of S/C:
- Series: mptcp: sync the msk->sndbuf at accept() time
- Submitter: Gang Yan
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1080031&state=*&archive=both
14530420: [mptcp-net] mptcp: sockopt: set timestamp flags on subflow socket, not msk:
- Submitter: Gang Yan
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
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, Matthieu Baerts, Ren Wei, Shardul Bankar, Li Xiasong):
14509844: [5.15.y] MPTCP: fix lock class name family in pm_nl_create_listen_socket:
- Submitter: Matthieu Baerts
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
14525200: [net,1/1] mptcp: hold subflow request owners when cloning reqsk:
- Series: [net,1/1] mptcp: hold subflow request owners when cloning reqsk
- Submitter: Ren Wei
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1081484&state=*&archive=both
- v2 expected
14530439: [v2] selftests: harness: fix pidfd leak in __wait_for_test:
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/patch/a82e275ccfb2609a1984d90ab559fa3af78f1e81.1776678050.git.tanggeliang@kylinos.cn/
14531150: [net,1/2] mptcp: sync the msk->sndbuf at accept() time
14531151: [net,2/2] selftests: mptcp: add a check for sndbuf of S/C:
- Series: mptcp: sync the msk->sndbuf at accept() time
- Submitter: Matthieu Baerts
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1083422&state=*&archive=both
14533993: [v2] mptcp: do not drop partial packets:
- Submitter: Shardul Bankar
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
- v2 sent to netdev, too quickly + commit sha are not in net trees → TODO Matth: reply → done
14529269: [RFC,net] mptcp: pm: fix ADD_ADDR timer infinite retry on option space insufficient:
- State: New
- Submitter: Li Xiasong
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
- reviewed, looks good, but v2 needed
our repo (by: Christoph Paasch, David CARLIER, Gang Yan, Geliang Tang, Gregory Detal, Matthieu Baerts, Paolo Abeni, Shardul Bankar):
12282223: [RESEND,RFC,mptpcp-next] mptcp: add ooo prune support:
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: same as last time
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: same as last time
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: same as last time
13675217: [mptcp-next,RFC,1/4] mptcp: add push sched callback
13675218: [mptcp-next,RFC,2/4] mptcp: use new push callback to schedule chunks
13675219: [mptcp-next,RFC,3/4] mptcp: bpf: allow to write to mptcp_sched_chunk
13675220: [mptcp-next,RFC,4/4] selftests/bpf: mptcp RR: send 1 MSS on each subflow:
- State: RFC
- Series: mptcp: update scheduler API
- Submitter: Gregory Detal
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=856158&state=*&archive=both
- Status: same as last time
13932555: [1/3] mptcp: fix invalid addr occupy 'add_addr_accepted'
13932556: [2/3] selftests: mptcp: relax conditions in SYN_TX validation
13932546: [3/3] selftests: mptcp: add a testcase for invalid addr timeout:
- State: Changes requested
- Series: [1/3] mptcp: fix invalid addr occupy 'add_addr_accepted'
- Submitter: Gang Yan
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=923771&state=*&archive=both
- Status: same as last time
14024767: [mptcp-next,v1,1/4] bpf: Add mptcp path manager struct_ops
14024768: [mptcp-next,v1,2/4] bpf: Export mptcp path manager kfuncs
14024769: [mptcp-next,v1,3/4] selftests/bpf: Add mptcp netlink pm subtest
14024770: [mptcp-next,v1,4/4] selftests/bpf: Add mptcp bpf_netlink pm subtest:
- State: Changes requested
- Series: BPF path manager, part 7
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=946095&state=*&archive=both
- Status: same as last time
14167004: [mptcp-next] mptcp: remove redundant orig_offset in carve_data_frag:
- State: Changes requested
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/patch/9c663fc37767d9036379afdbc83cd8874a7b2fc9.1753337130.git.tanggeliang@kylinos.cn/
- Status: same as last time
14175678: [mptcp-next,1/2] mptcp: Add support for SO_MAX_PACING_RATE
14175679: [mptcp-next,2/2] selftests: Add tests for SO_MAX_PACING_RATE:
- State: Changes requested
- Series: mptcp: Add support for SO_MAX_PACING_RATE
- Submitter: Christoph Paasch
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=987909&state=*&archive=both
- Status: same as last time
14185125: [mptcp-next,1/6] mptcp: add helper for setsockopt on first subflow only
14185126: [mptcp-next,2/6] mptcp: handle SOL_SOCKET options on first subflow only
14185128: [mptcp-next,3/6] mptcp: refactor IP socket option handling for first subflow
14185127: [mptcp-next,4/6] mptcp: extract IPv6 socket option handling for first subflow
14185129: [mptcp-next,5/6] mptcp: handle SOL_TCP options on all subflows
14185130: [mptcp-next,6/6] mptcp: handle IP socket options on all subflows:
- State: Needs ack
- Series: refactor MPTCP socket option handling
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=990414&state=*&archive=both
- Status: same as last time
14185142: [mptcp-next,v2,1/3] mptcp: add IPV6_TCLASS socket option support
14185143: [mptcp-next,v2,2/3] mptcp: add IP_TTL socket option support
14185144: [mptcp-next,v2,3/3] mptcp: add IPV6_UNICAST_HOPS socket option support:
- State: Needs ack
- Series: mptcp: add more sockopts
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=990418&state=*&archive=both
- Status: same as last time
14197780: [mptcp-next,v2,01/10] selftests: mptcp: sockopt: improve test output clarity
14197781: [mptcp-next,v2,02/10] selftests: mptcp: sockopt: add SO_REUSEADDR test helper
14197782: [mptcp-next,v2,03/10] selftests: mptcp: sockopt: add SO_REUSEPORT test
14197783: [mptcp-next,v2,04/10] selftests: mptcp: sockopt: add SO_BINDTODEVICE test
14197784: [mptcp-next,v2,05/10] selftests: mptcp: sockopt: add SO_BINDTOIFINDEX test
14197785: [mptcp-next,v2,06/10] selftests: mptcp: sockopt: add IP_FREEBIND tests
14197786: [mptcp-next,v2,07/10] selftests: mptcp: sockopt: add IP_TRANSPARENT tests
14197787: [mptcp-next,v2,08/10] selftests: mptcp: sockopt: add IP_BIND_ADDRESS_NO_PORT test
14197788: [mptcp-next,v2,09/10] selftests: mptcp: sockopt: add IP_LOCAL_PORT_RANGE test
14197789: [mptcp-next,v2,10/10] selftests: mptcp: sockopt: add IPV6_V6ONLY test:
14529269: [RFC,net] mptcp: pm: fix ADD_ADDR timer infinite retry on option space insufficient:
- State: New
- Submitter: Li Xiasong
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
- reviewed, looks good, but v2 needed
- State: Changes requested
- Series: selftests: cover more MPTCP socket options
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=993905&state=*&archive=both
- Status: same as last time
14215849: [mptcp-net,v2,1/3] selftests: mptcp: close server file descriptor
14215850: [mptcp-net,v2,2/3] selftests: mptcp: close IPC descriptor on server side
14229120: [mptcp-next,v4,1/9] selftests: mptcp: sockopt: replace /dev/urandom with getrandom
14229121: [mptcp-next,v4,2/9] selftests: mptcp: sockopt: add protocol arguments
14229122: [mptcp-next,v4,3/9] selftests: mptcp: sockopt: add inq argument
14229123: [mptcp-next,v4,4/9] selftests: mptcp: sockopt: rename pipefd to ipcfd
14229124: [mptcp-next,v4,5/9] selftests: mptcp: sockopt: set TCP_INQ sockopt
14229125: [mptcp-next,v4,6/9] selftests: mptcp: sockopt: handle INQ on server side
14229126: [mptcp-next,v4,7/9] selftests: mptcp: sockopt: handle INQ on client side
14229127: [mptcp-next,v4,8/9] selftests: mptcp: sockopt: replace mptcp_inq with sockopt
14229128: [mptcp-next,v4,9/9] selftests: mptcp: sockopt: remove obsolete mptcp_inq:
- State: Changes requested
- Series: selftests: consolidate TCP_INQ testing into sockopt
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1001827&state=*&archive=both
- Status: same as last time
14332026: [RFC,mptcp-next] mptcp: support net.ipv4.tcp_rcvbuf_low_rtt:
- State: Changes requested
- Submitter: Matthieu Baerts
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
- Status: same as last time
14413156: [mptcp-net,1/3] mptcp: add backlog_list bug reproducer test
14413157: [mptcp-net,2/3] mptcp: fix receive stalls when 'ack_seq' in backlog_list
14478733: [RESEND,mptcp-next,v2,1/3] tcp: export do_tcp_splice_eof
14478734: [RESEND,mptcp-next,v2,2/3] mptcp: implement .splice_eof
14478735: [RESEND,mptcp-next,v2,3/3] selftests: mptcp: connect: trigger splice_eof:
- State: Changes requested
- Series: implement .splice_eof
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1067870&state=*&archive=both
- Status: same as last time
14478884: [mptcp-net,v2] mptcp: fix data-race in __mptcp_retrans / mptcp_incoming_options:
- State: Queued
- Submitter: Matthieu Baerts
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
- Status: same as last time
14481348: [mptcp-next,v3,1/2] mptcp: implement psock_update_sk_prot
14481349: [mptcp-next,v3,2/2] selftests/bpf: Update sockmap tests for MPTCP:
- State: Changes requested
- Series: implement psock_update_sk_prot
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1068551&state=*&archive=both
- Status: same as last time
14506449: [mptcp-net,v5,1/5] mptcp: replace backlog_list with backlog_queue
14506450: [mptcp-net,v5,2/5] mptcp: fix the stall problems using backlog_queue
14506451: [mptcp-net,v5,3/5] mptcp: fix the stall problems with data_ready
14506452: [mptcp-net,v5,4/5] mptcp: fix the dead_lock in mptcp_data_ready
14506453: [mptcp-net,v5,5/5] selftests: mptcp: test transmission with small rcvbuf:
- State: Needs ack
- Series: mptcp: fix stall because of data_ready
- Submitter: Gang Yan
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1075676&state=*&archive=both
- Replaced by Paolo's series
14507171: [RFC,mptcp-next,v8,1/7] nvmet-tcp: define target tcp_proto struct
14507172: [RFC,mptcp-next,v8,2/7] nvmet-tcp: register target mptcp transport
14507173: [RFC,mptcp-next,v8,3/7] nvmet-tcp: implement target mptcp proto
14507174: [RFC,mptcp-next,v8,4/7] nvme-tcp: define host tcp_proto struct
14507175: [RFC,mptcp-next,v8,5/7] nvme-tcp: register host mptcp transport
14507176: [RFC,mptcp-next,v8,6/7] nvme-tcp: implement host mptcp proto
14507177: [RFC,mptcp-next,v8,7/7] selftests: mptcp: add NVMe over MPTCP test:
- State: Needs ack
- Series: NVME over MPTCP
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1075844&state=*&archive=both
- Status: same as last time
14525252: [mptcp-net,v5,01/20] mptcp: pm: kernel: correctly retransmit ADD_ADDR ID 0
14525253: [mptcp-net,v5,02/20] mptcp: pm: ADD_ADDR rtx: fix potential data-race
14525254: [mptcp-net,v5,03/20] mptcp: pm: ADD_ADDR rtx: allow ID 0
14525255: [mptcp-net,v5,04/20] mptcp: pm: ADD_ADDR rtx: always decrease sk refcount
14525256: [mptcp-net,v5,05/20] mptcp: pm: ADD_ADDR rtx: free sk if last
14525257: [mptcp-net,v5,06/20] mptcp: pm: ADD_ADDR rtx: resched blocked ADD_ADDR quicker
14525258: [mptcp-net,v5,07/20] mptcp: pm: ADD_ADDR rtx: skip inactive subflows
14525259: [mptcp-net,v5,08/20] mptcp: pm: retrans ADD_ADDR: return early if no retrans
14525260: [mptcp-net,v5,09/20] mptcp: pm: prio: skip closed subflows
14525261: [mptcp-net,v5,10/20] selftests: mptcp: check output: catch cmd errors
14525262: [mptcp-net,v5,11/20] selftests: mptcp: pm: restrict 'unknown' check to pm_nl_ctl
14525263: [mptcp-net,v5,12/20] mptcp: pm: in-kernel: explicitly limit batches to array size
14525264: [mptcp-net,v5,13/20] mptcp: pm: in-kernel: increase all limits to 64
14525265: [mptcp-net,v5,14/20] mptcp: pm: kernel: allow flushing more than 8 endpoints
14525266: [mptcp-net,v5,15/20] mptcp: pm: in-kernel: increase endpoints limit
14525267: [mptcp-net,v5,16/20] selftests: mptcp: join: allow changing ifaces nr per test
14525268: [mptcp-net,v5,17/20] selftests: mptcp: join: validate 8x8 subflows
14525269: [mptcp-net,v5,18/20] selftests: mptcp: pm: validate new limits
14525270: [mptcp-net,v5,19/20] selftests: mptcp: pm: use simpler send/recv forms
14525271: [mptcp-net,v5,20/20] mptcp: pm: clearer ADD_ADDR related helpers names:
- State: Changes requested
- Series: mptcp: pm: increase limits, and related fixes and cleanup
- Submitter: Matthieu Baerts
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1081499&state=*&archive=both
- TODO: Matth: send v6 with all patches but the refactoring and new ones → done
14529011: [mptcp-next,v4,1/3] mptcp: pm: userspace: drop delete_local_addr helper
14529012: [mptcp-next,v4,2/3] selftests: mptcp: join: update userspace dump_addr outputs
14529013: [mptcp-next,v4,3/3] selftests: mptcp: userspace: send RM_ADDR between server and client:
- State: New
- Series: only remove entry from local_addr_list when sending a REMOVE_ADDR
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1082700&state=*&archive=both
- TODO: review → done
14529050: [RFC,mptcp-next,v15,01/15] tls: add per-protocol cache to support mptcp
14529051: [RFC,mptcp-next,v15,02/15] tls: introduce struct tls_prot_ops
14529052: [RFC,mptcp-next,v15,03/15] tls: add tls_prot_ops pointer to tls_proto
14529053: [RFC,mptcp-next,v15,04/15] mptcp: update mptcp_check_readable
14529054: [RFC,mptcp-next,v15,05/15] mptcp: implement tls_mptcp_ops
14529055: [RFC,mptcp-next,v15,06/15] tls: disable device offload for mptcp sockets
14529056: [RFC,mptcp-next,v15,07/15] mptcp: update ulp getsockopt for tls support
14529057: [RFC,mptcp-next,v15,08/15] mptcp: enable ulp setsockopt for tls support
14529058: [RFC,mptcp-next,v15,09/15] selftests: mptcp: connect: use espintcp for ulp test
14529059: [RFC,mptcp-next,v15,10/15] selftests: tls: add mptcp variant for testing
14529060: [RFC,mptcp-next,v15,11/15] selftests: tls: increase pollin timeouts for mptcp
14529061: [RFC,mptcp-next,v15,12/15] selftests: tls: increase nonblocking data size for mptcp
14529062: [RFC,mptcp-next,v15,13/15] selftests: tls: wait close in shutdown_reuse for mptcp
14529063: [RFC,mptcp-next,v15,14/15] selftests: tls: add mptcp test cases
14529064: [RFC,mptcp-next,v15,15/15] selftests: mptcp: cover mptcp tls tests:
- State: New
- Series: MPTCP KTLS support
- Submitter: Geliang Tang
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1082710&state=*&archive=both
- To be reviewed
- Is it still a RFC type series?
14530390: [RESEDN,mptcp-net] mptcp: update window_clamp on subflows when SO_RCVBUF is set:
- State: New
- Submitter: Gang Yan
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
- TODO: Matth: review → done
14530482: [RFC,1/6] mptcp: move checks vs rcvbuf size earlier in the RX path
14530486: [RFC,2/6] mptcp: sync mptcp skb cb layout with tcp one
14530483: [RFC,3/6] tcp: expose the tcp_collapse_ofo_queue() helper to mptcp usage, too
14530484: [RFC,4/6] mptcp: implemented OoO queue pruning
14530485: [RFC,5/6] mptcp: refine coalescing conditions
14530487: [RFC,6/6] mptcp: unclone skbs before coalescing them, when needed:
- State: New
- Series: mptcp: address stall under memory pressure
- Submitter: Paolo Abeni
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1083242&state=*&archive=both
- replacing "mptcp: fix stall because of data_ready", Gang will take over
- looks important when we are in memory pressure and packets in the OoO queue
- Selftest from Gang series needed here
- and/or ideally a packetdrill test
14532336: mptcp: add per-reason MIB counters for MPTCP_RST_EMPTCP resets:
- State: New
- Series: mptcp: add per-reason MIB counters for MPTCP_RST_EMPTCP resets
- Submitter: Shardul Bankar
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1083751&state=*&archive=both
- TODO: Matth: review: → done
- selftests
- one case not set
- Mat: maybe a helper to set the reason and the MIB counter?
14532727: [mptcp-net] mptcp: fastclose msk when linger time is 0:
- State: New
- Submitter: Matthieu Baerts
- URL: https://patchwork.kernel.org/project/mptcp/patch/[email protected]/
- Reviewed, can be applied
14533173: [mptcp-next,v3,1/3] mptcp: propagate RECVERR sockopts to subflows
14533174: [mptcp-next,v3,2/3] mptcp: support MSG_ERRQUEUE on the parent socket
14533175: [mptcp-next,v3,3/3] selftests: mptcp: cover IP_RECVERR sockopt propagation:
- State: New
- Series: mptcp: MSG_ERRQUEUE support on the parent socket
- Submitter: David CARLIER
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1084059&state=*&archive=both
- probably some messages needs to be filtered, not to tell the app that there is an issue just because one subflow has been disconnected. Maybe more MPTCP specific messages could be passed somehow (+ new subflows, etc.).
14533469: [mptcp-net,1/2] mptcp: fix scheduling with atomic in timestamp sockopt
14533470: [mptcp-next,2/2] mptcp: use sockopt_lock(release)_sock in sockopt:
- State: New
- Series: mptcp: replace lock_sock_fast with sleepable lock
- Submitter: Gang Yan
- URL: https://patchwork.kernel.org/project/mptcp/list/?series=1084186&state=*&archive=both
- maybe the patch 2/2 is also for net? → Needs to check when this helper has been introduced, but likely it should be covered the MPTCP case
Extra, just in case
Issues on GitHub:
https://github.com/multipath-tcp/mptcp_net-next/issues/
Recently opened (latest from the last meeting: 618):
621 [syzkaller] WARNING in `inet_sock_destruct`: `atomic_read(&sk->sk_rmem_alloc)` [bug] [syzkaller]:
- Also happening with TCP, maybe not due to MPTCP?
- (but some code has been "recently" modified on that side)
620 [syzkaller] WARNING in `mptcp_pm_alloc_anno_list` [bug] [syzkaller]:
- Doesn't look like an urgent bug: probably an ADD_ADDR got removed at re-added in //
619 mptcp: update window_clamp when `SO_RCVBUF` is set [bug]:
- see patches from Gang ↑
Recently discussed:
599 [syzbot] possible deadlock in `mptcp_subflow_create_socket`: `nbd` has a lockdep dependency between `reclaim` and `af_socket` [bug] [syzkaller]:
- forbid nbd to create MPTCP in-kernel sockets?
448 Allow sending ADD_ADDR IPv6 with port-number if TCP-timestamps are enabled [enhancement] @matttbe
Bugs (opened, flagged as "bug" and assigned)
575 sockopt: support `TCP_MD5SIG` and `TCP_MD5SIG_EXT` for transparent integrations [bug] @geliangtang
498 in-kernel PM: closed subflows before `RM_ADDR` will not decrement `add_addr_accepted` [bug] [pm] @geliangtang
484 BPF: `setsockopt` on an MPTCP socket: check support [bug] [bpf] @geliangtang
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)
621 [syzkaller] WARNING in `inet_sock_destruct`: `atomic_read(&sk->sk_rmem_alloc)` [bug] [syzkaller]
620 [syzkaller] WARNING in `mptcp_pm_alloc_anno_list` [bug] [syzkaller]
619 mptcp: update window_clamp when `SO_RCVBUF` is set [bug]
600 mptcp: avoid dropping partial packets [bug]
599 [syzbot] possible deadlock in `mptcp_subflow_create_socket`: `nbd` has a lockdep dependency between `reclaim` and `af_socket` [bug] [syzkaller]
592 Lower throughput with MPTCP vs TCP [bug]
587 in-kernel PM: Server is only using single IP to establish subflows [bug]
583 KMemLeak: from `mptcp_sk_clone_init()` [bug] [selftests]
581 Default scheduler under-utilizes newly restored subflows on long-lived flows after WAN failback [bug]
572 [syzkaller] WARNING in `skb_try_coalesce` [bug] [syzkaller]
549 pm: in-kernel: set `msk->pm.work_pending` back to `true` [bug] [pm]
492 userspace pm: subflows counter: not updated when a subflows is removed from the other end [bug]
491 selftests: `mptcp_join`: tests `Infinite map` & `MP_FAIL MP_RST` are unstable [bug] [selftests]
483 [6.1] selftests: `mptcp_connect.sh` failures with `copyfd_io_poll: poll timed out` errors [bug] [selftests]
475 `simult_flows`: unbalanced bwidth tests are unstable [bug] [selftests]
439 mptcp vs net.ipv4.tcp_shrink_window [bug]
336 Issues with BPF packet scheduler [bug] [sched] [bpf]
In Progress (opened, new feature and assigned)
568 socket option: support `IPV6_TCLASS` [enhancement] @geliangtang
521 Implement psock_update_sk_prot, for eBPF SOCKMAP support [enhancement] [bpf] @geliangtang
480 MPTCP and KTLS support [enhancement] @geliangtang
448 Allow sending ADD_ADDR IPv6 with port-number if TCP-timestamps are enabled [enhancement] @matttbe
434 in-kernel PM: increase subflows limit [enhancement] [pm] @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
167 packetdrill: add coverage for RM_ADDR [enhancement] [packetdrill] @dcaratti
75 BPF: packet scheduler [enhancement] [sched] [bpf] @geliangtang
74 BPF: path manager [enhancement] [pm] [bpf] @geliangtang
Assigned Questions (opened, questions and assigned)
548 disable mptcp for an interface [question] @matttbe
Open questions (opened, questions and not assigned)
562 [performance] How much is the overhead of MPTCP？ [question]
For later (opened and not assigned)
618 `TCP_RTO_MIN`/`MAX`: used configured values if any [enhancement]
610 MPTCP tree in `linux-next` [enhancement]
590 in-kernel PM: use either `subflow` or `signal` depending on connector/listener app [enhancement]
588 in-kernel PM: support NUMA awareness [enhancement] [feedback-needed]
584 [syzkaller] improve coverage [syzkaller]
578 sockopt: support `SO_MAX_PACING_RATE` to limit the whole MPTCP connection [enhancement]
566 pm: use `signal` + `subflow` + `fullmesh` [enhancement] [pm]
556 Implement all required bits to C/R MPTCP connections from user-space (CRIU) [enhancement]
552 pm: in-kernel: delay before creating new subflows [enhancement]
545 Deal with multiple pure TCP ACK without MPTCP options [enhancement]
543 TCPDump: display `MP_TCPRST` info [enhancement]
542 in-kernel PM: limit to one subflow per network interface for each connection [enhancement] [pm]
535 TCPDump: display `MP_CAPABLE` C flag [enhancement]
525 tests: cover more MPTCP socket options [enhancement] [packetdrill] [selftests]
519 Reset the connection once "MPTCP has been verified" instead of a fallback [enhancement]
511 Add MIB counters for sent `MPTCP_RST_EMPTCP` [enhancement]
497 in-kernel PM: check to create new subflows when some are destroyed [enhancement] [pm]
496 in-kernel PM: store received `ADD_ADDR` [enhancement] [pm]
481 remove refcount on TCP sockets for the timers [enhancement]
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]
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]
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 in-kernel PM: send >1 ADD_ADDR before the establishment of a new subflow [enhancement] [pm]
332 scheduler: implement a "opportunistic retransmission" [enhancement] [sched]
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]
234 Packetdrill: Support MPC+DATA+checksum error [enhancement] [packetdrill]
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]
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]
78 notify the application (userspace) when a subflow is added/removed [enhancement]
41 reduce indirect call usage [enhancement]
24 Revisit layout of struct mptcp_subflow_context [enhancement]
Recently closed (since 2026-04-08)
602 A query about the update of 'msk->sk_sndbuf' [bug]
Packetdrill PRs
194 6 days ago Dwyane-Yan packetdrill: mptcp: add SO_RCVBUF window_clamp test:
- Matth will look at that
162 2 months ago geliangtang mptcp: add splice test
52 1 year ago dcaratti Add initial coverage for RM_ADDR
mptcp.dev PRs: /
mptcp-upstream-virtme-docker PRs: /
mptcpd PRs: /
FYI: Current Roadmap:
- Bugs: https://github.com/multipath-tcp/mptcp_net-next/issues?q=is%3Aissue+is%3Aopen+label%3Abug
- Current/Coming merge window (7.2): https://github.com/orgs/multipath-tcp/projects/20
- For later: https://github.com/orgs/multipath-tcp/projects/1
- ChangeLog has been updated: https://github.com/multipath-tcp/mptcp_net-next/wiki#changelog
Patches to send to NetDev:
- Fixes for other trees: /
- Fixes for -net:
- [e514cf82e760] mptcp: sync the msk->sndbuf at accept() time (Gang Yan)
- [571d5ec7d37d] selftests: mptcp: add a check for sndbuf of S/C (Gang Yan):
- sent
- [7b3128255ae2] mptcp: sockopt: set timestamp flags on subflow socket, not msk (Gang Yan):
- to be sent on Monday, probably with other ones
- Fixes for net-next: /
- Features for net-next:
- [500ce5b4370b] mptcp: pm: init and release mptcp_pm_ops (Geliang Tang)
- [c332486b930b] mptcp: pm: add get_local_id() interface (Geliang Tang)
- [120682a0b8b3] mptcp: pm: add get_priority() interface (Geliang Tang):
- closed + waiting for pm->lock refatoring
- Features for net-next (next):
- Features for other trees:
- [0e84bd9b1465] bpf: Add mptcp_subflow bpf_iter (Geliang Tang)
- [c5756629a523] selftests/bpf: More endpoints for endpoint_init (Geliang Tang)
- [49912a0ca539] selftests/bpf: Drop cgroup_fd of run_mptcpify (Geliang Tang)
- [210b864f5c12] bpf: Add mptcp packet scheduler struct_ops (Geliang Tang)
- [25c4205ffad6] bpf: Export mptcp packet scheduler helpers (Geliang Tang)
- [d5aec14c08b5] selftests/bpf: Add bpf scheduler test (Geliang Tang)
- [6451b3b1c444] selftests/bpf: Add bpf_first scheduler & test (Geliang Tang)
- [1e67e3ff965d] selftests/bpf: Add bpf_bkup scheduler & test (Geliang Tang)
- [8f34aa06e34f] selftests/bpf: Add bpf_rr scheduler & test (Geliang Tang)
- [ef3c03279978] selftests/bpf: Add bpf_red scheduler & test (Geliang Tang)
- [6abfb48b79aa] selftests/bpf: Add bpf_burst scheduler & test (Geliang Tang):
- waiting for sched API refactoring
Extra tests:
- news about Syzkaller? (Matth):
- found some issues, now the UI is showing to which subsystems an issue is linked to
- Packetdrill (Davide):
- /
- Patchew (Davide):
- /
- CI (Matth):
- https://ci-results.mptcp.dev/flakes.html
- https://netdev.bots.linux.dev/flakes.html?tn-needle=mptcp
- some issues with packetdrill, especially with the debug mode
- some tests stall, probably a bug in the CPU sched or related, due to Linus' merge window
Next meeting:
- Every two weeks, on Wednesday.
- 15:30 UTC (8.30am PST, 5.30pm CEST, 12.30am CST)
- Still open to everyone!
- https://github.com/multipath-tcp/mptcp_net-next/wiki/Meetings
Feel free to comment on these topics and suggest new ones for the next
meeting!
Talk to you soon,
Matt
--
Sponsored by the NGI0 Core fund.