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Date:   Tue, 17 Sep 2019 22:55:05 +0200
From:   Andrew Lunn <>
To:     Iwan R Timmer <>
Cc:     Vivien Didelot <>,
        Florian Fainelli <>,
        "David S. Miller" <>,
Subject: Re: [PATCH net-next] net: dsa: mv88e6xxx: Add support for port

On Tue, Sep 17, 2019 at 10:23:01PM +0200, Iwan R Timmer wrote:
> Add support for configuring port mirroring through the cls_matchall
> classifier. We do a full ingress and/or egress capture towards the
> capture port, configured with set_egress_port.

Hi Iwan

This looks good as far as it goes.

Have you tried adding/deleting multiple port mirrors? Do we need to
limit how many are added. A quick look at the datasheet, you can
define one egress mirror port and one ingress mirror port. I think you
can have multiple ports mirroring ingress to that one ingress mirror
port. And you can have multiple port mirroring egress to the one
egress mirror port. We should add code to check this, and return
-EBUSY if the existing configuration prevents a new mirror being


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