linux-kernel - [PATCH net-next 0/4] mptcp: pm: in-kernel: fullmesh endp nb + bind cases

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251101-net-next-mptcp-fm-endp-nb-bind-v1-0-b4166772d6bb@kernel.org>
Date: Sat, 01 Nov 2025 18:56:50 +0100
From: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
To: Mat Martineau <martineau@...nel.org>, Geliang Tang <geliang@...nel.org>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Simon Horman <horms@...nel.org>, Shuah Khan <shuah@...nel.org>
Cc: netdev@...r.kernel.org, mptcp@...ts.linux.dev, 
 linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
Subject: [PATCH net-next 0/4] mptcp: pm: in-kernel: fullmesh endp nb + bind
 cases

Here is a small optimisation for the in-kernel PM, joined by a small
behavioural change to avoid confusions, and followed by a few more
tests.

- Patch 1: record fullmesh endpoints numbers, not to iterate over all
  endpoints to check if one is marked as fullmesh.

- Patch 2: when at least one endpoint is marked as fullmesh, only use
  these endpoints when reacting to an ADD_ADDR, even if there are no
  endpoints for this IP family: this is less confusing.

- Patch 3: reduce duplicated code to prepare the next patch.

- Patch 4: extra "bind" cases: the listen socket restrict the bind to
  one IP address, not allowing MP_JOIN to extra IP addresses, except if
  another listening socket accepts them.

Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
---
Matthieu Baerts (NGI0) (4):
      mptcp: pm: in-kernel: record fullmesh endp nb
      mptcp: pm: in kernel: only use fullmesh endp if any
      selftests: mptcp: join: do_transfer: reduce code dup
      selftests: mptcp: join: validate extra bind cases

 include/uapi/linux/mptcp.h                        |   3 +-
 net/mptcp/pm_kernel.c                             |  36 ++++-
 net/mptcp/protocol.h                              |   1 +
 net/mptcp/sockopt.c                               |   2 +
 tools/testing/selftests/net/mptcp/mptcp_connect.c |  10 +-
 tools/testing/selftests/net/mptcp/mptcp_join.sh   | 187 +++++++++++++++++++---
 6 files changed, 213 insertions(+), 26 deletions(-)
---
base-commit: 01cc760632b875c4ad0d8fec0b0c01896b8a36d4
change-id: 20251101-net-next-mptcp-fm-endp-nb-bind-cf7ab688d9f1

Best regards,
-- 
Matthieu Baerts (NGI0) <matttbe@...nel.org>