netdev - [PATCH net-next 00/11] mptcp: PM listener events + selftests cleanup

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Date:   Wed, 30 Nov 2022 15:06:22 +0100
From:   Matthieu Baerts <matthieu.baerts@...sares.net>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        Matthieu Baerts <matthieu.baerts@...sares.net>,
        Paolo Abeni <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        mptcp@...ts.linux.dev, netdev@...r.kernel.org
Subject: [PATCH net-next 00/11] mptcp: PM listener events + selftests cleanup

Thanks to the patch 6/11, the MPTCP path manager now sends Netlink events when
MPTCP listening sockets are created and closed. The reason why it is needed is
explained in the linked ticket [1]:

  MPTCP for Linux, when not using the in-kernel PM, depends on the userspace PM
  to create extra listening sockets before announcing addresses and ports. Let's
  call these "PM listeners".

  With the existing MPTCP netlink events, a userspace PM can create PM listeners
  at startup time, or in response to an incoming connection. Creating sockets in
  response to connections is not optimal: ADD_ADDRs can't be sent until the
  sockets are created and listen()ed, and if all connections are closed then it
  may not be clear to the userspace PM daemon that PM listener sockets should be
  cleaned up.

  Hence this feature request: to add MPTCP netlink events for listening socket
  close & create, so PM listening sockets can be managed based on application
  activity.

  [1] https://github.com/multipath-tcp/mptcp_net-next/issues/313

Selftests for these new Netlink events have been added in patches 9,11/11.

The remaining patches introduce different cleanups and small improvements in
MPTCP selftests to ease the maintenance and the addition of new tests.

Geliang Tang (6):
  mptcp: add pm listener events
  selftests: mptcp: enhance userspace pm tests
  selftests: mptcp: make evts global in userspace_pm
  selftests: mptcp: listener test for userspace PM
  selftests: mptcp: make evts global in mptcp_join
  selftests: mptcp: listener test for in-kernel PM

Matthieu Baerts (5):
  selftests: mptcp: run mptcp_inq from a clean netns
  selftests: mptcp: removed defined but unused vars
  selftests: mptcp: uniform 'rndh' variable
  selftests: mptcp: clearly declare global ns vars
  selftests: mptcp: declare var as local

 include/uapi/linux/mptcp.h                    |   9 +
 net/mptcp/pm_netlink.c                        |  57 ++++
 net/mptcp/protocol.c                          |   3 +
 net/mptcp/protocol.h                          |   2 +
 tools/testing/selftests/net/mptcp/diag.sh     |   1 +
 .../selftests/net/mptcp/mptcp_connect.sh      |   6 +-
 .../testing/selftests/net/mptcp/mptcp_join.sh | 118 +++++--
 .../selftests/net/mptcp/mptcp_sockopt.sh      |  69 ++--
 .../selftests/net/mptcp/simult_flows.sh       |   4 +-
 .../selftests/net/mptcp/userspace_pm.sh       | 298 ++++++++++--------
 10 files changed, 375 insertions(+), 192 deletions(-)

base-commit: 91a7de85600d5dfa272cea3cef83052e067dc0ab
-- 
2.37.2