netdev - Re: [PATCH] vlan_dev: VLAN 0 should be treated as "no vlan tag" (802.1p packet)

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Date:	Wed, 16 Jun 2010 16:24:11 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Pedro Garcia <pedro.netdev@...devamos.com>
Cc:	netdev@...r.kernel.org, Eric Dumazet <eric.dumazet@...il.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: [PATCH] vlan_dev: VLAN 0 should be treated as "no vlan tag" (802.1p packet)

On Wednesday 16 June 2010, Pedro Garcia wrote:
> Probably a definitive fix would be not to allow the definition of VLAN 0 
> in 802.1q module and provide some other way to tag priority packets without
> using a subinterface (maybe in the same module or a new 8021p one). I am 
> having a look at the kernel to see what happens if we load two modules for 
> the same protocol. 

On a related note, we will also need to support 802.1Qad provider bridges
at some point, which use yet another variation of the VLAN header (actually
two nested VLAN tags) with a different ethertype.
I need this for 802.1Qbg multi-channel VEPA (possibly also 802.1Qbh
port extenders), but I have not yet investigated how to implement this
in the VLAN module.

> By the way, the changelog I have to write is just the text before the 
> patch?

Yes.

	Arnd
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