netdev - Re: [PATCH net-next v9 06/13] net: Add struct kernel_ethtool_ts

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Message-ID: <20240229101739.2b1cdecb@kmaincent-XPS-13-7390>
Date: Thu, 29 Feb 2024 10:17:39 +0100
From: Köry Maincent <kory.maincent@...tlin.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Florian Fainelli <florian.fainelli@...adcom.com>, Broadcom internal
 kernel review list <bcm-kernel-feedback-list@...adcom.com>, Andrew Lunn
 <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, Russell King
 <linux@...linux.org.uk>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Richard
 Cochran <richardcochran@...il.com>, Radu Pirea
 <radu-nicolae.pirea@....nxp.com>, Jay Vosburgh <j.vosburgh@...il.com>, Andy
 Gospodarek <andy@...yhouse.net>, Nicolas Ferre
 <nicolas.ferre@...rochip.com>, Claudiu Beznea <claudiu.beznea@...on.dev>,
 Willem de Bruijn <willemdebruijn.kernel@...il.com>, Jonathan Corbet
 <corbet@....net>, Horatiu Vultur <horatiu.vultur@...rochip.com>,
 UNGLinuxDriver@...rochip.com, Simon Horman <horms@...nel.org>, Vladimir
 Oltean <vladimir.oltean@....com>, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org, Maxime Chevallier
 <maxime.chevallier@...tlin.com>, Rahul Rameshbabu <rrameshbabu@...dia.com>
Subject: Re: [PATCH net-next v9 06/13] net: Add struct
 kernel_ethtool_ts_info

On Tue, 27 Feb 2024 19:27:37 -0800
Jakub Kicinski <kuba@...nel.org> wrote:

> On Mon, 26 Feb 2024 14:39:57 +0100 Kory Maincent wrote:
> > In prevision to add new UAPI for hwtstamp we will be limited to the struct
> > ethtool_ts_info that is currently passed in fixed binary format through the
> > ETHTOOL_GET_TS_INFO ethtool ioctl. It would be good if new kernel code
> > already started operating on an extensible kernel variant of that
> > structure, similar in concept to struct kernel_hwtstamp_config vs struct
> > hwtstamp_config.
> > 
> > Since struct ethtool_ts_info is in include/uapi/linux/ethtool.h, here
> > we introduce the kernel-only structure in include/linux/ethtool.h.
> > The manual copy is then made in the function called by ETHTOOL_GET_TS_INFO.
> >  
> 
> This one doesn't apply.
> It's going to be a pain to keep rebasing it, since its a nop AFAICT -
> do you want to post it separately to get it merged quickly?

Weird, it does on my side on net-next.
It would be great to have a review on the core of the new implementation
beforehand. I don't want this patch to be merged but not used at all if the
implementation does not fit what is expected. What do you think?

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