netdev - Re: [RFC PATCH v2 0/3] Create common DPLL/clock configuration API

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Date:   Sat, 1 Oct 2022 07:47:24 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Vadim Fedorenko <vfedorenko@...ek.ru>,
        Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Vadim Fedorenko <vadfed@...com>, Aya Levin <ayal@...dia.com>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org
Subject: Re: [RFC PATCH v2 0/3] Create common DPLL/clock configuration API

Fri, Sep 30, 2022 at 04:33:12PM CEST, kuba@...nel.org wrote:
>On Fri, 30 Sep 2022 10:33:57 +0200 Jiri Pirko wrote:
>> >> Also, did you consider usage of sysfs? Why it isn't a better fit than
>> >> netlink?  
>> >
>> >We already have sysfs implemented in the ptp_ocp driver. But it looks like
>> >more hardware is going to be available soon with almost the same functions,
>> >so it would be great to have common protocol to configure such devices.  
>> 
>> Sure, but more hw does not mean you can't use sysfs. Take netdev as an
>> example. The sysfs exposed for it is implemented net/core/net-sysfs.c
>> and is exposed for all netdev instances, no matter what the
>> driver/hardware is.
>
>Wait, *you* are suggesting someone uses sysfs instead of netlink?
>
>Could you say more because I feel like that's kicking the absolute.

I don't understand why that would be a problem. What I'm trying to say
is, perhaps sysfs is a better API for this purpose. The API looks very
neat and there is no probabilito of huge grow. Also, with sysfs, you
don't need userspace app to do basic work with the api. In this case, I
don't see why the app is needed. These are 2 biggest arguments for sysfs
in this case as I see it.