netdev - Re: [PATCH RFC v2 net-next 03/28] net/sched: act_api: increase TCA_ID

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Message-ID: <CAM0EoMmQNjt=rkBntFPSEAe5RWHNMKzZEkZtyOZ_dK7q3zC3KA@mail.gmail.com>
Date: Sat, 3 Jun 2023 09:03:23 -0400
From: Jamal Hadi Salim <jhs@...atatu.com>
To: Marcelo Ricardo Leitner <mleitner@...hat.com>
Cc: netdev@...r.kernel.org, deb.chatterjee@...el.com, anjali.singhai@...el.com, 
	namrata.limaye@...el.com, tom@...anda.io, p4tc-discussions@...devconf.info, 
	Mahesh.Shirshyad@....com, Vipin.Jain@....com, tomasz.osinski@...el.com, 
	jiri@...nulli.us, xiyou.wangcong@...il.com, davem@...emloft.net, 
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, vladbu@...dia.com, 
	simon.horman@...igine.com, khalidm@...dia.com, toke@...hat.com
Subject: Re: [PATCH RFC v2 net-next 03/28] net/sched: act_api: increase TCA_ID_MAX

On Fri, Jun 2, 2023 at 10:19 AM Marcelo Ricardo Leitner
<mleitner@...hat.com> wrote:
>
> On Wed, May 17, 2023 at 07:02:07AM -0400, Jamal Hadi Salim wrote:
> > --- a/include/uapi/linux/pkt_cls.h
> > +++ b/include/uapi/linux/pkt_cls.h
> > @@ -140,9 +140,9 @@ enum tca_id {
> >       TCA_ID_MPLS,
> >       TCA_ID_CT,
> >       TCA_ID_GATE,
> > -     TCA_ID_DYN,
> > +     TCA_ID_DYN = 256,
> >       /* other actions go here */
> > -     __TCA_ID_MAX = 255
> > +     __TCA_ID_MAX = 1023
> >  };
>
> It feels that this patch should go together with the 1st one, when
> dynamic actions were introduced. When I was reading that patch, I was
> wondering about possible conflicts with a new loaded dynamic action
> and some userspace app using a new tca_id definition (it is UAPI,
> after all) that overlaps with it.

Good catch. We'll make this change in the next update.

cheers,
jamal