Re: [PATCH net-next 0/5] PTP support for the SJA1105 DSA driver

From: Richard Cochran
Date: Sat Jun 01 2019 - 22:22:49 EST

On Sat, Jun 01, 2019 at 03:06:59PM +0300, Vladimir Oltean wrote:
> PTP frames will reconstruct the full timestamp without waiting for any
> meta (they are the meta), while other MAC-trapped frames (STP etc)
> will just carry a meaningless skb->cb when passed up the stack.
> In retrospect, it would have been amazing if the switch gave me the
> meta frames *before* the actual link-local frames that needed the
> timestamp.

I didn't follow everything you wrote, but it sounds like you are on
the right track!