netdev - Re: [RFC:] struct net_device_ops: Add function pointer to fill device specific ndisc information

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Date:	Mon, 21 Jan 2013 22:16:41 +0100
From:	Stephan Gatzka <stephan.gatzka@...il.com>
To:	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
CC:	Stefan Richter <stefanr@...6.in-berlin.de>,
	netdev <netdev@...r.kernel.org>,
	linux1394-devel@...ts.sourceforge.net,
	David Miller <davem@...emloft.net>
Subject: Re: [RFC:] struct net_device_ops: Add function pointer to fill device
 specific ndisc information

>> Full ack. And that's the reason why I feel very uncomfortable with a Yoshifujis hardware address extensions by fifo_addr, spd, and max_rec.
>>
>> This seems possible with a single netdevice for IPv4/6 only if we _always_ use the same fifo address for both IPv4 and IPv6. Do we all agree on that?
>
> I do not understand what "that" and "this" mean here.
> Do you want to have different FIFO on single net_device? If yes, for what?
>

Oh, I'm sorry for being mixed-up. I meant that your proposal for 
enhancing the hardware address seems to be a feasible solution, if we 
_never_ want to have distinct fifo addresses for IPv4 and IPv6. This 
will be just impossible with a single netdevice.

But I have to admit that I have no good use case for different fifo 
addresses...

So overall, your proposal seems to be a possible solution. Nevertheless, 
I can't help that I find it a bit awkward to have speed, max_rec and 
fifo address in the hardware address of the network device. For me, 
that's just the GUID.

I want to have an ack from Stefan Richter before I'm going to implement 
your solution.

Regards,

Stephan
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