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Date:   Mon, 16 Mar 2020 12:39:44 +0300
From:   Sergei Shtylyov <>
To:     Michal Kubecek <>,
        David Miller <>,
        Jakub Kicinski <>,
Cc:     Johannes Berg <>,
Subject: Re: [PATCH net 3/3] ethtool: reject unrecognized request flags


On 15.03.2020 20:17, Michal Kubecek wrote:

> As pointed out by Jakub Kicinski, we ethtool netlink code should respond


> with an error if request head has flags set which are not recognized by
> kernel, either as a mistake or because it expects functionality introduced
> in later kernel versions.
> To avoid unnecessary roundtrips, use extack cookie to  provide the
> information about supported request flags.
> Signed-off-by: Michal Kubecek <>

MBR, Sergei

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