netdev - Re: [PATCH 1/2] vdpa: support set mac address from vdpa tool

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Date: Thu, 13 Jun 2024 16:46:53 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Jakub Kicinski <kuba@...nel.org>, Cindy Lu <lulu@...hat.com>,
	dtatulea@...dia.com, jasowang@...hat.com,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] vdpa: support set mac address from vdpa tool

Thu, Jun 13, 2024 at 09:50:54AM CEST, mst@...hat.com wrote:
>On Thu, Jun 13, 2024 at 09:21:07AM +0200, Jiri Pirko wrote:
>> Thu, Jun 13, 2024 at 08:49:25AM CEST, mst@...hat.com wrote:
>> >On Wed, Jun 12, 2024 at 09:22:32AM +0200, Jiri Pirko wrote:
>> >> Wed, Jun 12, 2024 at 09:15:44AM CEST, mst@...hat.com wrote:
>> >> >On Wed, Jun 12, 2024 at 08:29:53AM +0200, Jiri Pirko wrote:
>> >> >> Wed, Jun 12, 2024 at 03:58:10AM CEST, kuba@...nel.org wrote:
>> >> >> >On Tue, 11 Jun 2024 13:32:32 +0800 Cindy Lu wrote:
>> >> >> >> Add new UAPI to support the mac address from vdpa tool
>> >> >> >> Function vdpa_nl_cmd_dev_config_set_doit() will get the
>> >> >> >> MAC address from the vdpa tool and then set it to the device.
>> >> >> >> 
>> >> >> >> The usage is: vdpa dev set name vdpa_name mac **:**:**:**:**:**
>> >> >> >
>> >> >> >Why don't you use devlink?
>> >> >> 
>> >> >> Fair question. Why does vdpa-specific uapi even exist? To have
>> >> >> driver-specific uapi Does not make any sense to me :/
>> >> >
>> >> >I am not sure which uapi do you refer to? The one this patch proposes or
>> >> >the existing one?
>> >> 
>> >> Sure, I'm sure pointing out, that devlink should have been the answer
>> >> instead of vdpa netlink introduction. That ship is sailed,
>> >
>> >> now we have
>> >> unfortunate api duplication which leads to questions like Jakub's one.
>> >> That's all :/
>> >
>> >
>> >
>> >Yea there's no point to argue now, there were arguments this and that
>> >way.  I don't think we currently have a lot
>> >of duplication, do we?
>> 
>> True. I think it would be good to establish guidelines for api
>> extensions in this area.
>> 
>> >
>> >-- 
>> >MST
>> >
>
>
>Guidelines are good, are there existing examples of such guidelines in
>Linux to follow though? Specifically after reviewing this some more, I

Documentation directory in general.


>think what Cindy is trying to do is actually provisioning as opposed to
>programming.
>
>-- 
>MST
>