netdev - RE: [net-next PATCH 1/2] devlink: add dry run attribute to flash update

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Date:   Fri, 5 Aug 2022 19:50:37 +0000
From:   "Keller, Jacob E" <jacob.e.keller@...el.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     Jiri Pirko <jiri@...nulli.us>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [net-next PATCH 1/2] devlink: add dry run attribute to flash
 update



> -----Original Message-----
> From: Jakub Kicinski <kuba@...nel.org>
> Sent: Friday, August 05, 2022 11:51 AM
> To: Keller, Jacob E <jacob.e.keller@...el.com>
> Cc: Jiri Pirko <jiri@...nulli.us>; netdev@...r.kernel.org
> Subject: Re: [net-next PATCH 1/2] devlink: add dry run attribute to flash update
> 
> On Fri, 5 Aug 2022 16:32:30 +0000 Keller, Jacob E wrote:
> > > Hm, yes. Don't invest too much effort into rendering per-cmd policies
> > > right now, tho. I've started working on putting the parsing policies
> > > in YAML last Friday. This way we can auto-gen the policy for the kernel
> > > and user space can auto-gen the parser/nl TLV writer. Long story short
> > > we can kill two birds with one stone if you hold off until I have the
> > > format ironed out. For now maybe just fork the policies into two -
> > > with and without dry run attr. We'll improve the granularity later
> > > when doing the YAML conversion.
> >
> > Any update on this?
> >
> > FWIW I started looking at iproute2 code to dump policy and check
> > whether a specific attribute is accepted by the kernel.
> 
> Yes and no, I coded a little bit of it up, coincidentally I have a YAML
> policy for genetlink policy querying if that's helpful:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/kuba/linux.git/tree/tools/net/ynl
> /samples/nlctrl.c?h=gnl-gen-dpll
> 

I'll take a look at this.

> I'll try to wrap up the YAML format by today / tomorrow and send an
> early RFC, but the codegen part (and everything else really) still
> requires much work.

I'd like to see it and provide some early review.

> Probably another month until I can post the first
> non-RFC with error checking, kernel policy generation, uAPI generation
> etc.

Ya, I figured this would take quite a lot of effort to get to completion.