netdev - Re: Genetlink per cmd policies

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Message-ID: <20200930160303.uymslyt5isgzcl67@lion.mk-sys.cz>
Date:   Wed, 30 Sep 2020 18:03:03 +0200
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Jiri Pirko <jiri@...nulli.us>, johannes@...solutions.net,
        dsahern@...nel.org, pablo@...filter.org, netdev@...r.kernel.org
Subject: Re: Genetlink per cmd policies

On Wed, Sep 30, 2020 at 08:49:55AM -0700, Jakub Kicinski wrote:
> Hi!
> 
> I'd like to be able to dump ethtool nl policies, but right now policy
> dumping is only supported for "global" family policies.
> 
> Is there any reason not to put the policy in struct genl_ops, 
> or just nobody got to it, yet?
> 
> I get the feeling that this must have been discussed before...

It used to be per-cmd but with common maxattr which didn't make much
sense. In 5.2 cycle, commit 3b0f31f2b8c9 ("genetlink: make policy common
to family") changed it to common policy for each family.

Michal