From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: Re: VLAN test cases in 2.6.38.7 Date: Tue, 24 May 2011 15:52:52 -0700 Message-ID: <4DDC36C4.80408@candelatech.com> References: <4DDBFDD6.4060903@candelatech.com> <4DDC0236.4090800@candelatech.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: netdev Return-path: Received: from mail.candelatech.com ([208.74.158.172]:36814 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932757Ab1EXWwx (ORCPT ); Tue, 24 May 2011 18:52:53 -0400 Received: from [192.168.100.195] (firewall.candelatech.com [70.89.124.249]) (authenticated bits=0) by ns3.lanforge.com (8.14.2/8.14.2) with ESMTP id p4OMqqMv021632 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 24 May 2011 15:52:52 -0700 In-Reply-To: <4DDC0236.4090800@candelatech.com> Sender: netdev-owner@vger.kernel.org List-ID: On 05/24/2011 12:08 PM, Ben Greear wrote: > 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? Either my ubridge code is broken, or 2.6.38.7+ doesn't send tp_vlan_tci properly. All I ever see is zero for that field. Test case is: set up VLAN traffic generator on VLAN 7 on separate machine. udp traffic, 56kbps, 1024 byte udp payload. Set up ubridge on test machine: ifconfig eth1 promisc ifconfig eth3 promisc # Make NIC go into stripping mode. ip link add link eth1 up name eth1.9 type vlan id 9 ./do_test.pl eth1 eth3 Expect that at least tci is != 0. The ubridge code is here: http://www.candelatech.com/~greearb/misc/ubridge.tar.gz Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com