netdev - Re: [PATCH net-next v8 08/13] netlink: specs: add ethnl PHY

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Message-ID: <20240221170023.452a01ca@kernel.org>
Date: Wed, 21 Feb 2024 17:00:23 -0800
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, thomas.petazzoni@...tlin.com, Andrew Lunn
 <andrew@...n.ch>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Russell King <linux@...linux.org.uk>,
 linux-arm-kernel@...ts.infradead.org, Christophe Leroy
 <christophe.leroy@...roup.eu>, Herve Codina <herve.codina@...tlin.com>,
 Florian Fainelli <f.fainelli@...il.com>, Heiner Kallweit
 <hkallweit1@...il.com>, Vladimir Oltean <vladimir.oltean@....com>,
 Köry Maincent <kory.maincent@...tlin.com>, Jesse Brandeburg
 <jesse.brandeburg@...el.com>, Jonathan Corbet <corbet@....net>, Marek
 Behún <kabel@...nel.org>, Piergiorgio Beruto
 <piergiorgio.beruto@...il.com>, Oleksij Rempel <o.rempel@...gutronix.de>,
 Nicolò Veronese <nicveronese@...il.com>, Simon Horman
 <horms@...nel.org>, mwojtas@...omium.org
Subject: Re: [PATCH net-next v8 08/13] netlink: specs: add ethnl PHY_GET
 command set

On Tue, 20 Feb 2024 19:42:11 +0100 Maxime Chevallier wrote:
> +      -
> +        name: upstream-phy-index
> +        type: u32

The C define appears to be called:

	ETHTOOL_A_PHY_UPSTREAM_INDEX,		/* u32 */

either it needs to gain the PHY_ or the spec needs to lose the phy-,
otherwise C code gen gets upset:

ethtool-user.c:689:10: error: ‘ETHTOOL_A_PHY_UPSTREAM_PHY_INDEX’ undeclared here (not in a function); did you mean ‘ETHTOOL_A_PHY_UPSTREAM_INDEX’?
  689 |         [ETHTOOL_A_PHY_UPSTREAM_PHY_INDEX] = { .name = "upstream-phy-index", .type = YNL_PT_U32, },
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |          ETHTOOL_A_PHY_UPSTREAM_INDEX

Unfortunately ethtool in the in-between state where we can auto-gen
user space code (or rather most of it) but the uAPI header is not
auto-generated so we need to take extra care to keep things in sync :(