[PATCH dpdk v4] net: fix VLAN packet type

[David Marchand]

On Mon, 27 Apr 2026 at 17:53, Thomas Monjalon <thomas at monjalon.net> wrote:
>
> 27/04/2026 12:47, Robin Jarry:
> > David Marchand, Apr 25, 2026 at 10:40:
> > > On Thu, 23 Apr 2026 at 13:25, Robin Jarry <rjarry at redhat.com> wrote:
> > > This is untested, but what do you think?
> >
> > That looks correct. But you don't impose a limit in the number of VLANs?
> >
> > I don't see any good reason to support more than 2 stacked tags.
>
> Look in the mailing list.
> I remember it was to limit a risk of infinite loop.

Defensive programming (iiuc why it was introduced) seems a bad idea.
It imposes a restriction for no good reason.
The same can be achieved by checking the offset vs packet length
(rte_pktmbuf_read), and no arbitrary limit needed.

I am for simply reverting the patch in LTS releases.
We can come up with a new change in main for Gregory usecase, but it
does not seem like something we want to backport in LTS.


-- 
David Marchand