netdev - Re: [PATCH net-next RFC v4 2/5] net: Expose available time stamping layers to user space.

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Date:   Wed, 12 Apr 2023 14:19:10 +0200
From:   Köry Maincent <kory.maincent@...tlin.com>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     Michael Walle <michael@...le.cc>, kuba@...nel.org,
        gerhard@...leder-embedded.com, glipus@...il.com,
        krzysztof.kozlowski+dt@...aro.org, linux@...linux.org.uk,
        maxime.chevallier@...tlin.com, netdev@...r.kernel.org,
        richardcochran@...il.com, robh+dt@...nel.org,
        thomas.petazzoni@...tlin.com, vadim.fedorenko@...ux.dev
Subject: Re: [PATCH net-next RFC v4 2/5] net: Expose available time stamping
 layers to user space.

On Wed, 12 Apr 2023 14:08:40 +0300
Vladimir Oltean <vladimir.oltean@....com> wrote:

> On Wed, Apr 12, 2023 at 12:50:34PM +0200, Michael Walle wrote:
> > >> +/* Hardware layer of the SO_TIMESTAMPING provider */
> > >> +enum timestamping_layer {
> > >> +	SOF_MAC_TIMESTAMPING =3D (1<<0),
> > >> +	SOF_PHY_TIMESTAMPING =3D (1<<1),  
> > >
> > > What does SOF_ stand for?  
> > 
> > I'd guess start of frame. The timestamp will be taken at the
> > beginning of the frame.  
> 
> I would suggest (with all due respect) that it was an inapt adaptation
> of the Socket Option Flags that can be seen in
> Documentation/networking/timestamping.rst.
> 
> These are not socket option flags (because these settings are not per
> socket), so the namespace/prefix is not really correctly used here.

As Jakub said, who knows maybe one day it will be per socket information,
but indeed for now it is not the case.
I will stick to whatever name the community prefer.