netdev - Re: [PATCH RFC v6 1/6] dpll: spec: Add Netlink spec in YAML

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Date:   Mon, 20 Mar 2023 21:13:54 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     "Kubalewski, Arkadiusz" <arkadiusz.kubalewski@...el.com>
Cc:     Jiri Pirko <jiri@...nulli.us>, Vadim Fedorenko <vadfed@...a.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Vadim Fedorenko <vadim.fedorenko@...ux.dev>,
        poros <poros@...hat.com>, mschmidt <mschmidt@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "Michalik, Michal" <michal.michalik@...el.com>
Subject: Re: [PATCH RFC v6 1/6] dpll: spec: Add Netlink spec in YAML

On Mon, 20 Mar 2023 21:05:49 -0700 Jakub Kicinski wrote:
> > Actually this particular one is not needed (also value: 12 on pin above),
> > I will remove those.
> > But the others you are refering to (the ones in nested attribute list),
> > are required because of cli.py parser issue, maybe Kuba knows a better way to
> > prevent the issue?
> > Basically, without those values, cli.py brakes on parsing responses, after
> > every "jump" to nested attribute list it is assigning first attribute there
> > with value=0, thus there is a need to assign a proper value, same as it is on
> > 'main' attribute list.  
> 
> Are you saying the parser gets confused after returning from nested
> parsing? Can you still repro this problem? I don't see any global
> state in _decode()..

Oh, I grokked the attr structure. This should be fixed now.
Commit 7cf93538e087 ("tools: ynl: fully inherit attrs in subsets")

The entire attr structure is a bit off (/ inspired by devlink?)
Why create one huge attribute space with all attributes in it?
Try to find something in the devlink attrs, it's pages long with 
little to no reuse :| Can't pins and devices have their own spaces?

If one has to carry a link to the other you should create a subset
so there is no circular dependency. That's the only potentially tricky
thing I can think of...