Re: [PATCH] s390 - mark IPv6 support for QETH as broken

[YOSHIFUJI Hideaki / 吉藤英明]

In article <200407092115.18097.linux-kernel@xxxxxxxxxxxxxxx> (at Fri, 9 Jul 2004 21:15:17 +0200), Christian Borntraeger <linux-kernel@xxxxxxxxxxxxxxx> says:

> Andrew Morton wrote:
> > Bastian Blank <bastian@xxxxxxxxxxxx> wrote:
> > >  The attached patch marks IPv6 support for QETH broken, it is known to
> > >  need an extra patch to compile which was submitted one year ago but
> > >  never accepted.
> >
> > Well fixing it would be the preferable approach.  Where is the "extra
> > patch" and what was the complaint?
> 
> http://oss.sgi.com/projects/netdev/archive/2003-02/msg00061.html

I don't see why it does NOT compile as you said.
It tried to add scheme for driver-specific interface identifier 
(including EUI-64 based on hardware address) generation scheme 
(in addition to the current ont; device-type-specific one).

> The problem is that on s390 several virtual servers share the PHY and MAC 
> part of the card and therefore have the same MAC address. Unfortunately 
> IPv6 uses this MAC address to build an address. Now all virtual servers 
> have the same auto configured IPv6 address - which is bad.
> The proposed solution was to enable network card drivers to define their own 
> ipv6 address auto configuration. 

I think it would be good to store interface identifier when
initializing interface, by RTM_NEWLINK attribute probably.

-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@xxxxxxxxxxxxxx>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA
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