Interesting unused file in repo with bridging trace

[Andrew Rybchenko]

On 9/15/25 10:40 AM, Christophe Fontaine wrote:
> 
> 
>> On 15 Sep 2025, at 08:17, Andrew Rybchenko <Andrew.Rybchenko at oktetlabs.ru> wrote:
>>
>> Hi,
>>
>> diving into Grout I found very interesting file modules/infra/control/xconnect.c
>> which contains trace of bridging support (bridge_domain, GR_L2_MODE_SET,
>> gr_l2_iface_mode_req). I'm really interested in this topic and would like to know
>> if you have plans on it. Do you have any WIP which you could share?
>> This bits already give some hints on how it could be added etc, but I'd like to
>> know more if it is possible.
> 
> Hi Andew,
> 
> I started to work on the boiler plate code [1], in a very rough (aka non working) state, just to understand how much work is needed to get a complete feature.
> 
> —> I may rewrite that completely when I’ll actually test it.
> Using a hash table may not be the most efficient for a mac learning switch, and using the lib rte_member may be better for that purpose, emulating a TCAM.
> I’ll try both implementations, the deciding factor being how many cycles per packet this will consume !
> 
> Here are the pending design decisions:
> - how to handle packets to a routing interface in a bridge
> - how does this bridge mode integrate in a potential VXLAN implementation, or in EVPN scenarios

Many thanks for the prompt reply. It is very helpful.

Andrew.

> 
> HTH,
> Christophe
> 
> [1] https://github.com/DPDK/grout/commit/fe8704bd4afed254a20f06538a5098df1d524f3d
> 
> 
> 
>>
>> Yes, the file is not actually used.  It is not built.
> 
> Indeed, that file isn’t included, my bad: I removed it as part of the commit.
> 
>>
>> Andrew.
>>
>