netdev - Re: [PATCH net-2.6][NEIGH] Updating affected neighbours when about MAC address change

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Date:	Sun, 23 Dec 2007 22:04:47 +0900 (JST)
From:	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>
To:	hadi@...erus.ca
Cc:	dshwatrz@...il.com, davem@...emloft.net, netdev@...r.kernel.org,
	kaber@...sh.net, yoshfuji@...ux-ipv6.org
Subject: Re: [PATCH net-2.6][NEIGH] Updating affected neighbours when about
 MAC address change

In article <1198413975.4423.65.camel@...alhost> (at Sun, 23 Dec 2007 07:46:15 -0500), jamal <hadi@...erus.ca> says:

> On Sun, 2007-23-12 at 21:38 +0900, YOSHIFUJI Hideaki / 吉藤英明 wrote:
> > In article <31436f4a0712230424n1cfaeb27o463e62093af41090@...l.gmail.com> (at Sun, 23 Dec 2007 14:24:00 +0200), "David Shwatrz" <dshwatrz@...il.com> says:
> > 
> > > Regarding your answer;  I accept it and I will soon send a revised
> > > version of this patch (making changes to
> > >  arp_netdev_event() and ndisc_netdev_event().)
> > > I had  IPv4 in mind, there is no reason that it will no be also in IPv6.
> > 
> > You should iterate all of ifa_list (for IPv4) / addr_list (for IPv6).
> > For IPv6, we also have anycast (maintained by ac_list) as well.
> > 
> 
> Hrm, how is this going to work for the case of multiple MACs on a
> device? 
> Changing one MAC address doesnt equate to issuing a grat arp with _the
> new MAC_ for all ifa (given each MAC may be map to a different ifa) 

If the secondary MACs are used with ARP/NDP, we should take care of
that, but I think we use the primary MAC for ARP/NDP, no?
(In other words, we always use primary MAC for ARP reply / NA, no?)

--yoshfuji
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