Linux Ethernet Bridging - Jan 2020 - [Bridge] [RFC net-next Patch 0/3] net: bridge: mrp: Add support for Media Redundancy Protocol(MRP)

From: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
Date: Fri, 10 Jan 2020 16:13:36 +0200
> I agree with Stephen here, IMO you have to take note of how STP has
progressed
> and that bringing it in the kernel was a mistake, these days mstpd has an
active
> community and much better support which is being extended. This looks best
implemented
> in user-space in my opinion with minimal kernel changes to support it. You
could simply
> open a packet socket with a filter and work through that, you don't
need new netlink
> sockets. I'm not familiar with the protocol so can't really be the
judge of that, if
> you present a good argument for needing a new netlink socket for these
packets - then
> sure, ok.
With a userland implementation, what approach do you suggest for DSA/switchdev
offload
of this stuff?

On 10 January 2020 21:27:36 EET, David Miller <davem at davemloft.net>
wrote:
>From: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
>Date: Fri, 10 Jan 2020 16:13:36 +0200
>
>> I agree with Stephen here, IMO you have to take note of how STP has
>progressed
>> and that bringing it in the kernel was a mistake, these days mstpd
>has an active
>> community and much better support which is being extended. This looks
>best implemented
>> in user-space in my opinion with minimal kernel changes to support
>it. You could simply
>> open a packet socket with a filter and work through that, you don't
>need new netlink
>> sockets. I'm not familiar with the protocol so can't really be
the
>judge of that, if
>> you present a good argument for needing a new netlink socket for
>these packets - then
>> sure, ok.
>
>With a userland implementation, what approach do you suggest for
>DSA/switchdev offload
>of this stuff?
Good question, there was no mention of that initially, or I missed it at least. 
There aren't many details about what/how will be offloaded right now.
We need more information about what will be offloaded and how it will fit. 



l