linux-kernel - [PATCH net 0/3] mptcp: userspace pm: create sockets for the right family

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Date:   Thu, 12 Jan 2023 18:42:51 +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>,
        Kishen Maloor <kishen.maloor@...el.com>,
        Florian Westphal <fw@...len.de>, Shuah Khan <shuah@...nel.org>
Cc:     netdev@...r.kernel.org, mptcp@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        Paolo Abeni <pabeni@...hat.com>,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        Matthieu Baerts <matthieu.baerts@...sares.net>,
        stable@...r.kernel.org
Subject: [PATCH net 0/3] mptcp: userspace pm: create sockets for the right family

Before these patches, the Userspace Path Manager would allow the
creation of subflows with wrong families: taking the one of the MPTCP
socket instead of the provided ones and resulting in the creation of
subflows with likely not the right source and/or destination IPs. It
would also allow the creation of subflows between different families or
not respecting v4/v6-only socket attributes.

Patch 1 lets the userspace PM select the proper family to avoid creating
subflows with the wrong source and/or destination addresses because the
family is not the expected one.

Patch 2 makes sure the userspace PM doesn't allow the userspace to
create subflows for a family that is not allowed.

Patch 3 validates scenarios with a mix of v4 and v6 subflows for the
same MPTCP connection.

These patches fix issues introduced in v5.19 when the userspace path
manager has been introduced.

To: "David S. Miller" <davem@...emloft.net>
To: Eric Dumazet <edumazet@...gle.com>
To: Jakub Kicinski <kuba@...nel.org>
To: Kishen Maloor <kishen.maloor@...el.com>
To: Florian Westphal <fw@...len.de>
To: Shuah Khan <shuah@...nel.org>
Cc: netdev@...r.kernel.org
Cc: mptcp@...ts.linux.dev
Cc: linux-kernel@...r.kernel.org
Cc: linux-kselftest@...r.kernel.org
Cc: Paolo Abeni <pabeni@...hat.com>
Cc: Mat Martineau <mathew.j.martineau@...ux.intel.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@...sares.net>

---
Matthieu Baerts (2):
      mptcp: netlink: respect v4/v6-only sockets
      selftests: mptcp: userspace: validate v4-v6 subflows mix

Paolo Abeni (1):
      mptcp: explicitly specify sock family at subflow creation time

 net/mptcp/pm.c                                    | 25 ++++++++++++
 net/mptcp/pm_userspace.c                          |  7 ++++
 net/mptcp/protocol.c                              |  2 +-
 net/mptcp/protocol.h                              |  6 ++-
 net/mptcp/subflow.c                               |  9 +++--
 tools/testing/selftests/net/mptcp/userspace_pm.sh | 47 +++++++++++++++++++++++
 6 files changed, 90 insertions(+), 6 deletions(-)
---
base-commit: be53771c87f4e322a9835d3faa9cd73a4ecdec5b
change-id: 20230112-upstream-net-20230112-netlink-v4-v6-b6b958039ee0

Best regards,
-- 
Matthieu Baerts <matthieu.baerts@...sares.net>