netdev - Re: [RFC PATCH 6/9] net: dsa: hellcreek: Add debugging mechanisms

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Message-ID: <CA+h21hokLntfn7sDW-6boJ+=_q2CGUM6aXLg68O7moMyLH=41w@mail.gmail.com>
Date:   Mon, 22 Jun 2020 17:14:36 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Kurt Kanzenbach <kurt@...utronix.de>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        netdev <netdev@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Richard Cochran <richardcochran@...il.com>,
        Kamil Alkhouri <kamil.alkhouri@...offenburg.de>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>
Subject: Re: [RFC PATCH 6/9] net: dsa: hellcreek: Add debugging mechanisms

Hi Kurt,

On Mon, 22 Jun 2020 at 15:34, Kurt Kanzenbach <kurt@...utronix.de> wrote:
>
>  * Re-prioritization of packets based on the ether type (not mac address)

This can be done by offloading a tc skbedit priority action, and a
"protocol" key (even though I don't understand why you need to mention
"not mac address".

>  * Packet logging (-> retrieval of packet time stamps) based on port, traffic class and direction

What does this mean? tcpdump can give you this, for traffic destined
to the CPU. Do you want to mirror/sample traffic to the CPU for debug?

>
> What API would be useful for these mechanisms?
>
> Thanks,
> Kurt

Thanks,
-Vladimir