netdev - Re: [PATCH net-next 05/10] docs: bridge: add STP doc

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Date: Fri, 24 Nov 2023 15:18:19 +0200
From: Nikolay Aleksandrov <razor@...ckwall.org>
To: Hangbin Liu <liuhangbin@...il.com>
Cc: netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>,
 David Ahern <dsahern@...nel.org>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Ido Schimmel <idosch@...sch.org>, Vladimir Oltean <olteanv@...il.com>,
 Roopa Prabhu <roopa@...dia.com>,
 Stephen Hemminger <stephen@...workplumber.org>,
 Florian Westphal <fw@...len.de>, Andrew Lunn <andrew@...n.ch>,
 Florian Fainelli <f.fainelli@...il.com>, Jiri Pirko <jiri@...nulli.us>,
 Marc Muehlfeld <mmuehlfe@...hat.com>
Subject: Re: [PATCH net-next 05/10] docs: bridge: add STP doc

On 11/21/23 05:02, Hangbin Liu wrote:
> On Mon, Nov 20, 2023 at 01:39:47PM +0200, Vladimir Oltean wrote:
>> On Fri, Nov 17, 2023 at 05:31:40PM +0800, Hangbin Liu wrote:
>>> +STP
>>> +===
>>
>> I think it would be very good to say a few words about the user space
>> STP helper at /sbin/bridge-stp, and that the kernel only has full support
>> for the legacy STP, whereas newer protocols are all handled in user
>> space. But I don't know a lot of technical details about it, so I would
>> hope somebody else chimes in with a paragraph inserted here somewhere :)
> 
> Hmm, I google searched but can't find this tool. Nikolay, is this tool still
> widely used? Do you know where I can find the source code/doc of it?
> 
> Thanks
> Hangbin

Man.. you're documenting the bridge, please check its source code and
you'll have your answer. "bridge-stp" is not a single tool, rather than
a device for the bridge to start/stop user-space stp when requested.
As an example here's the first google result:
https://github.com/mstpd/mstpd/blob/master/bridge-stp.in