Re: [PATCH net-next v2] mptcp: sockopt: implement IPV6_TCLASS

[Geliang Tang <geliang@kernel.org>]

Hi David, Matt,

On Tue, 2026-07-14 at 11:53 +0200, Matthieu Baerts wrote:
> Hi David, Geliang,
> 
> On 14/07/2026 11:48, David 'equinox' Lamparter wrote:
> > On Tue, Jul 14, 2026 at 10:22:12AM +0800, Geliang Tang wrote:
> > > Thanks for your patch. However there is already a version under
> > > review
> > > on the MPTCP mailing list that adds IPV6_TCLASS [1] (as well as
> > > IP_TTL
> > > and IPV6_UNICAST_HOPS).
> > > 
> > > https://patchwork.kernel.org/project/mptcp/patch/2617b8684039574734b8622936ef126d6a7cd519.1754986785.git.tanggeliang@kylinos.cn/
> > 
> > Darn, I looked for patches for this & didn't find any, but I've
> > also
> > been carrying this locally for a bit.
> > 
> > Anything I can do to help get your patch moving?
> I was hoping to do some refactoring around Geliang's code, but I
> didn't
> manage to do that so far. I will to see if it is fine to apply
> Geliang's
> patch (after netdevconf) and do the refactoring after.
> 
> @Geliang: do you mind rebasing this series, please? No hurry, I can
> also
> check later on. (And sorry for the delay on that)

I finally had time to do this IPV6_TCLASS refactoring. I merged my
changes into David's patch, keeping David as the patch author and
adding "Co-developed-by" tag for myself.

To verify the correctness of IPV6_TCLASS, I added IPV6_TCLASS support
to "NVMe over MPTCP" feature I'm currently working on, and all the
tests passed.

I will include this IPV6_TCLASS patch in my upcoming v3 of "Fix socket
options used by NVMe over MPTCP" soon.

Thanks,
-Geliang

> 
> Cheers,
> Matt