netdev - [PATCH net-next 0/4] Cascaded management xmit for SJA1105 DSA driver

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: <20240913131507.2760966-1-vladimir.oltean@nxp.com>
Date: Fri, 13 Sep 2024 16:15:03 +0300
From: Vladimir Oltean <vladimir.oltean@....com>
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Andrew Lunn <andrew@...n.ch>,
	Florian Fainelli <f.fainelli@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next 0/4] Cascaded management xmit for SJA1105 DSA driver

This patch set adds support for simple daisy chain topologies in the
sja1105 DSA driver:

 +------------+
 |    eth0    |
 |  (conduit) |
 +------------+
       |
       | Switch #1
 +------------+
 |    cpu     |--- user
 |            |--- user
 |    dsa     |--- user
 +------------+
       |
       | Switch #2
 +------------+
 |    dsa     |--- user
 |            |--- user
 |            |--- user
 |            |--- user
 +------------+

Previously we did support multi-switch trees, but not the simple kind.

What is special here is that sending PTP/STP packets out through
switch #2's user ports requires the programming of management routes in
switch #1 as well. Patch 4/4 does that. It requires some extra infra in
the DSA core, handled by patch 3/4. The extra infra requires documenting
an assumption in the dt-bindings: patch 2/4. And patch 1/4 is fixing a
bug I noticed while reviewing the code, but which is pretty hard to
meaningfully trigger, so I am not considering it a 'stable' candidate.

I do not actually have a board with a switch topology as described
above. This patch set was confirmed working by customers on their
boards. I have just regression-tested it on simple, single-switch trees.

Vladimir Oltean (4):
  net: dsa: free routing table on probe failure
  dt-bindings: net: dsa: the adjacent DSA port must appear first in
    "link" property
  net: dsa: populate dp->link_dp for cascade ports
  net: dsa: sja1105: implement management routes for cascaded switches

 .../devicetree/bindings/net/dsa/dsa-port.yaml |   9 +-
 drivers/net/dsa/sja1105/sja1105.h             |  43 ++-
 drivers/net/dsa/sja1105/sja1105_main.c        | 253 ++++++++++++++++--
 include/net/dsa.h                             |   9 +-
 net/dsa/dsa.c                                 |  43 ++-
 5 files changed, 307 insertions(+), 50 deletions(-)

-- 
2.34.1