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

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Message-ID: <CALe+Z03R_MPcgUSa8xoMeT5Sv3z8KwFhrtoYYzON=prfR-7hxQ@mail.gmail.com>
Date:	Thu, 9 Jul 2015 17:36:55 +0200
From:	Jan Blunck <jblunck@...radead.org>
To:	Jiri Pirko <jiri@...nulli.us>
Cc:	LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH] team: set IFF_SLAVE on team ports

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.

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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