Re: [PATCH nft] meta: introduce meta ibrhwdr support

[Pablo Neira Ayuso <pablo@netfilter.org>]

Hi Florian,

On Mon, Oct 13, 2025 at 09:47:05PM +0200, Florian Westphal wrote:
> Fernando Fernandez Mancera <fmancera@suse.de> wrote:
> > Can be used in bridge prerouting hook to redirect the packet to the
> > receiving physical device for processing.
> > 
> > table bridge nat {
> >         chain PREROUTING {
> >                 type filter hook prerouting priority 0; policy accept;
> >                 ether daddr de:ad:00:00:be:ef meta pkttype set host ether daddr set meta ibrhwdr accept
> >         }
> > }
> 
> Pablo, does the above ok to you?
> I am not sure about 'ibrhwdr'.

I'd suggest: ibrhwaddr, for consistency with other existing ibr
selectors and anything that relates to address uses the suffix 'addr'.

> Will there be an 'obrhwdr'?

No usecase for this so far.

> Or is it for consistency because its envisioned to be used in
> incoming direction?

Using the input device where this frame came from, which is a bridge
port, fetch the address of the upper bridge device on top of it.

It is a bit unix-like looking acronym, arguably not so intuitive, but
I don't have a better idea.

> Patch LGTM, I would apply this and the libnftnl dependency.