linux-kernel - Re: [PATCH net-next v4 05/17] net: pse-pd: Introduce PSE types enumeration

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Date: Wed, 21 Feb 2024 15:40:06 +0100
From: Köry Maincent <kory.maincent@...tlin.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Jakub Kicinski <kuba@...nel.org>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Jonathan Corbet <corbet@....net>, Luis Chamberlain
 <mcgrof@...nel.org>, Russ Weight <russ.weight@...ux.dev>, Greg
 Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki"
 <rafael@...nel.org>, Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
 Oleksij Rempel <o.rempel@...gutronix.de>, Mark Brown <broonie@...nel.org>,
 Frank Rowand <frowand.list@...il.com>, Heiner Kallweit
 <hkallweit1@...il.com>, Russell King <linux@...linux.org.uk>, Thomas
 Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
 devicetree@...r.kernel.org, Dent Project <dentproject@...uxfoundation.org>
Subject: Re: [PATCH net-next v4 05/17] net: pse-pd: Introduce PSE types
 enumeration

On Mon, 19 Feb 2024 16:44:34 +0100
Andrew Lunn <andrew@...n.ch> wrote:

> On Mon, Feb 19, 2024 at 04:04:56PM +0100, Köry Maincent wrote:
> > On Fri, 16 Feb 2024 17:36:38 -0800
> > Jakub Kicinski <kuba@...nel.org> wrote:  
> > > > > but why the separate header? Is it going to be used in other parts of
> > > > > uAPI than just in ethtool?      
> > > > 
> > > > We might use it in pse core if capabilities between PoE and PoDL differ
> > > > but I am not sure about it.
> > > > Do you prefer to move it to ethtool header and add prefix ETHTOOL_ to
> > > > the enum values?    
> > > 
> > > I don't know enough to have an opinion :) Whatever you end up doing,
> > > it's probably worth documenting the reason for the choice in the commit
> > > message?  
> > 
> > Mmh, I am still not sure of the best choice on this. I think I will move it
> > to ethtool as you suggested.  
> 
> kAPI is hard to change. So it is worth thinking about it.
> 
> Can you think of any possible kAPI not using ethtool netlink? Its not
> going to be ioctl. We generally don't export new things in /sysfs if
> we have netlink, etc.
> 
> So to me, it is only going to be used be the ethtool API, so i would
> follow the usual conventions for ethtool.

Oops sorry forgot to reply to you.
Indeed I reached to the same conclusion on my side.

Regards,
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com