netdev - Re: VLAN test cases in 2.6.38.7

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Date:	Tue, 24 May 2011 12:08:38 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	netdev <netdev@...r.kernel.org>
Subject: Re: VLAN test cases in 2.6.38.7

On 05/24/2011 11:49 AM, Ben Greear wrote:
>
> I wrote a simple bridge that uses packet sockets to read/write
> from network devices. I'll upload this code somewhere when
> I get it a bit more presentable.
>
> Machine info:
>
> Linux lf0300-demo 2.6.38.7+ #14 SMP Mon May 23 10:31:45 PDT 2011 i686
> i686 i386 GNU/Linux
>
> Interface A: eth1
> driver: igb
> version: 3.0.19
> firmware-version: 1.2-1
> bus-info: 0000:01:00.0
>
> Interface B: eth3:
> driver: igb
> version: 3.0.19
> firmware-version: 1.2-1
> bus-info: 0000:01:00.1
>
>
> If no vlans are on eth1 and eth3, then it bridges fine, with vlan
> headers inline. But, if you add a VLAN to eth1, it stops working,
> probably because pkt tag is then un-stripped. I was generating on
> vlan 7, and created vlan 9, btw.
>
> I'll see if I can figure out how to use aux-data next...

Why does the aux-data mask out the CFI bit?  Shouldn't
we just pass the 16-bit VLAN tag un-modified to user-space?

Thanks,
Ben

>
> Thanks,
> Ben
>


-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

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