netdev - Re: [RFC PATCH net-next 6/7] net: ethtool: add a netlink command to get PHY information

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Message-ID: <20230908084606.5707e1b1@kernel.org>
Date: Fri, 8 Sep 2023 08:46:06 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Maxime Chevallier <maxime.chevallier@...tlin.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, Andrew Lunn <andrew@...n.ch>, Eric Dumazet
 <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Florian Fainelli
 <f.fainelli@...il.com>, Heiner Kallweit <hkallweit1@...il.com>, Russell
 King <linux@...linux.org.uk>, Vladimir Oltean <vladimir.oltean@....com>,
 Oleksij Rempel <linux@...pel-privat.de>, Nicolò Veronese
 <nicveronese@...il.com>, thomas.petazzoni@...tlin.com, Christophe Leroy
 <christophe.leroy@...roup.eu>
Subject: Re: [RFC PATCH net-next 6/7] net: ethtool: add a netlink command to
 get PHY information

On Thu,  7 Sep 2023 11:24:04 +0200 Maxime Chevallier wrote:
>  	ETHTOOL_MSG_PHY_LIST_GET,
> +	ETHTOOL_MSG_PHY_GET,

The distinction between LIST_GET and GET is a bit odd for netlink.
GET has a do and a dump. The dump is effectively LIST_GET.

The dump can accept filtering arguments, like ifindex, if you want 
to narrow down the results, that's perfectly fine (you may need to
give up some of the built-in ethtool scaffolding, but it shouldn't 
be all that bad).