netdev - Re: [patch net-next v2 1/2] rtnetlink: allow to register ops without ops->setup set

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Date:	Thu, 26 Jun 2014 09:46:31 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	Stephen Hemminger <stephen@...workplumber.org>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, pshelar@...ira.com,
	cwang@...pensource.com, nicolas.dichtel@...nd.com,
	ebiederm@...ssion.com, david@...son.dropbear.id.au,
	sfeldma@...ulusnetworks.com, sucheta.chakraborty@...gic.com
Subject: Re: [patch net-next v2 1/2] rtnetlink: allow to register ops without
 ops->setup set

Wed, Jun 25, 2014 at 08:45:00PM CEST, stephen@...workplumber.org wrote:
>On Wed, 25 Jun 2014 18:58:22 +0200
>Jiri Pirko <jiri@...nulli.us> wrote:
>
>> So far, it is assumed that ops->setup is filled up. But there might be
>> case that ops might make sense even without ->setup. In that case,
>> forbid to newlink and dellink.
>> 
>> This allows to register simple rtnl link ops containing only ->kind.
>> That allows consistent way of passing device kind (either device-kind or
>> slave-kind) to userspace.
>> 
>> Signed-off-by: Jiri Pirko <jiri@...nulli.us>
>
>Can't we fix these kind of devices to all create/delete. At least
>allow delete.
>

Well it is not that easy to create openvswitch device. To do that you
have to have info specified in vport_params (see ovs_vport_alloc).

Delete could be implemented. But looking at the code, it could be a bit
tricky. But would that make sense to implement del and don't implement
add? I think it's better to leave both out.
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