netdev - Re: [patch net-next-2.6 v2] net: vlan: make non-hw-accel rx path similar to hw-accel

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Message-ID: <BANLkTinEnHLx1CVh8p0ejLkcaqoLHw2nOA@mail.gmail.com>
Date:	Sun, 22 May 2011 16:38:45 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Jiri Pirko <jpirko@...hat.com>
Cc:	Nicolas de Pesloüan 
	<nicolas.2p.debian@...il.com>, Jesse Gross <jesse@...ira.com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	shemminger@...ux-foundation.org, kaber@...sh.net, fubar@...ibm.com,
	eric.dumazet@...il.com, andy@...yhouse.net, ebiederm@...ssion.com
Subject: Re: [patch net-next-2.6 v2] net: vlan: make non-hw-accel rx path
 similar to hw-accel

On Sun, May 22, 2011 at 2:29 PM, Jiri Pirko <jpirko@...hat.com> wrote:
> Sun, May 22, 2011 at 04:59:49AM CEST, nicolas.2p.debian@...il.com wrote:
>
> <snip>
>>
>>And because some setups may still require the skb not to be untagged,
>>may be we need the ability to re-tag the skb in some situations...
>>When a protocol handler or rx_handler is explicitly registered on a
>>net_device which expect to receive tagged skb, we should deliver
>>tagged skb to it... Arguably, this may sound incredible for the
>>general case, but may be required for not-so-special cases like
>>bridge or protocol analyzer.
>
> Wait, what setups/code require the skb not to be untagged? If there's
> such, it should be fixed.
>

For a transparent bridge with ports: eth0 and eth1, the vlan tags
need to be preserved.

-- 
Regards,
Changli Gao(xiaosuo@...il.com)
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