linux-kernel - Re: [PATCH] team: set IFF

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Message-ID: <20150710064147.GA2204@nanopsycho.orion>
Date:	Fri, 10 Jul 2015 08:41:47 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	Jan Blunck <jblunck@...radead.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH] team: set IFF_SLAVE on team ports

Thu, Jul 09, 2015 at 05:36:55PM CEST, jblunck@...radead.org wrote:
>On Thu, Jul 9, 2015 at 12:07 PM, Jiri Pirko <jiri@...nulli.us> wrote:
>> Thu, Jul 09, 2015 at 11:58:34AM CEST, jblunck@...radead.org wrote:
>>>The code in net/ipv6/addrconf.c:addrconf_notify() tests for IFF_SLAVE to
>>>decide if it should start the address configuration. Since team ports
>>>shouldn't get link-local addresses assigned lets set IFF_SLAVE when linking
>>>a port to the team master.
>>
>> I don't want to use IFF_SLAVE in team. Other master-slave devices are
>> not using that as well, for example bridge, ovs, etc.
>>
>
>Maybe they need to get fixed too. I've used that flag because it is
>documented as
>a "slave of a load balancer" which describes what a team port is.
>
>
>> I think that this should be fixed in addrconf_notify. It should lookup
>> if there is a master on top and bail out in that case.
>
>There are other virtual interfaces that have a master assigned and want to
>participate in IPv6 address configuration.

Can you give me an example?


>
>Unless we want to have a cascade of conditionals testing the priv_flags in
>addrconf_notify() this is asking for a new net_device_flags flag.
>Maybe something
>generic like IFF_L2PORT ?
>
>Thanks,
>Jan
>
>[ Jiri, sorry for getting that mail twice ]
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