netdev - Re: [PATCH net-next 3/4] bridge: Consider the Nearest Customer Bridge group addresses

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Message-ID: <5396AE23.80808@lab.ntt.co.jp>
Date:	Tue, 10 Jun 2014 16:05:07 +0900
From:	Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
To:	vyasevic@...hat.com, Toshiaki Makita <toshiaki.makita1@...il.com>,
	Stephen Hemminger <stephen@...workplumber.org>
CC:	netdev@...r.kernel.org, bridge@...ts.linux-foundation.org,
	"David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH net-next 3/4] bridge: Consider the Nearest Customer Bridge
 group addresses

(2014/06/10 7:33), Vlad Yasevich wrote:
...
>>> Rather than special casing this around vlan filtering, I would prefer
>>> the code always forward these packets, or manipulate group_fwd_mask
>>> to allow it that way.
>>
>> These addresses must be forwarded only if the bridge is an S-VLAN
>> bridge. When it is a C-VLAN bridge or a .1D bridge, they may not be
>> forwarded. So, I don't think we can forward them always.
>>
>> Using group_fwd_mask is a bit complicated. If we use it to forward them,
>> user can optionally turn off forwarding ability of those addresses...
>> but we maybe need another information (named like group_fwd_mask_set)
>> that indicates which bit is set by user. (We have to set group_fwd_mask
>> automatically when we set vlan_proto to 88a8.)
>> Is this way acceptable?
> 
> May be separate it into required mask and user mask.  Set required
> mask when this is an S-VLAN bridge.

Sounds like a good idea.
I'll give it a try, thank you for your suggestion.

Thanks,
Toshiaki Makita

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