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

Vladimir Oltean
2023-04-12T11:08:51Z

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.