netdev - Re: [PATCH] ipv6: addrconf: clear IPv6 addresses and routes when losing link

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Message-ID: <AANLkTik2Q=fF9j6eiBQx33e2JU7EG3Sc5hnXyDH24+mt@mail.gmail.com>
Date:	Tue, 26 Oct 2010 15:53:50 -0700
From:	Lorenzo Colitti <lorenzo@...gle.com>
To:	David Miller <davem@...emloft.net>
Cc:	brian.haley@...com, shemminger@...tta.com, netdev@...r.kernel.org
Subject: Re: [PATCH] ipv6: addrconf: clear IPv6 addresses and routes when
 losing link

On Tue, Oct 26, 2010 at 11:23 AM, David Miller <davem@...emloft.net> wrote:
>> This works pretty well. Why not do the same for IPv6? The only
>> difference in IPv6 is that the kernel is the one doing
>> autoconfiguration, so it's the kernel that should be doing the asking.
>
> That should be fine, but if I have static IPv6 addresses assigned to
> an interface I really don't want them changing on a simple link flap.

As the patch stands, they don't. Only autoconfigured addresses will be
cleared, because addrconf_ifdown() does not remove any addresses that
are permanent (unless they are link-local, in which case they are
recreated as soon as link comes back).
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