linux-kernel - Re: [RFC net-next v5 0/9] net: bridge: mrp: Add support for Media Redundancy Protocol(MRP)

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Message-ID: <59ccd697-3c97-207e-a89d-f73e594ec7eb@cumulusnetworks.com>
Date:   Sat, 18 Apr 2020 12:01:03 +0300
From:   Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:     Horatiu Vultur <horatiu.vultur@...rochip.com>, davem@...emloft.net,
        jiri@...nulli.us, ivecera@...hat.com, kuba@...nel.org,
        roopa@...ulusnetworks.com, olteanv@...il.com, andrew@...n.ch,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bridge@...ts.linux-foundation.org, UNGLinuxDriver@...rochip.com
Subject: Re: [RFC net-next v5 0/9] net: bridge: mrp: Add support for Media
 Redundancy Protocol(MRP)

On 14/04/2020 14:26, Horatiu Vultur wrote:
> Media Redundancy Protocol is a data network protocol standardized by
> International Electrotechnical Commission as IEC 62439-2. It allows rings of
> Ethernet switches to overcome any single failure with recovery time faster than
> STP. It is primarily used in Industrial Ethernet applications.
> 
> Based on the previous RFC[1][2][3][4], the MRP state machine and all the timers
> were moved to userspace, except for the timers used to generate MRP Test frames.
> In this way the userspace doesn't know and should not know if the HW or the
> kernel will generate the MRP Test frames. The following changes were added to
> the bridge to support the MRP:
> - the existing netlink interface was extended with MRP support,
> - allow to detect when a MRP frame was received on a MRP ring port
> - allow MRP instance to forward/terminate MRP frames
> - generate MRP Test frames in case the HW doesn't have support for this
> 
> To be able to offload MRP support to HW, the switchdev API  was extend.
> 

Hi Horatiu,
The set still has a few blocker issues (bisectability, sysfs error return, use of extack)
and a few other cleanup tasks as I've noted in my replies to the respective patches.
I think with those out of the way you can submit it for inclusion.

Cheers,
 Nik