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List:       openvswitch-discuss
Subject:    [ovs-discuss] unable to match VLAN ID with userspace datapath
From:       blp () nicira ! com (Ben Pfaff)
Date:       2014-06-27 17:13:52
Message-ID: 20140627171352.GA1962 () nicira ! com
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It looks like branch-2.1 didn't get the following commit that did make
it into branch-2.2.  It may fix the problem.  Can you try
cherry-picking it?  If that solves it then I'm willing to backport it.

commit b73c85181df9cc38231a42d6f8095dcb604d230a
Author: Simon Horman <horms at verge.net.au>
Date:   Wed Jan 15 17:17:02 2014 +0900

    netdev-linux: Read packet auxdata to obtain vlan_tid
    
    If VLAN acceleration is used when the kernel receives a packet
    then the outer-most VLAN tag will not be present in the packet
    when it is received by netdev-linux. Rather, it will be present
    in auxdata.
    
    This patch uses recvmsg() instead of recv() to read auxdata for
    each packet and if the vlan_tid is set then it is added to the packet.
    
    Adding the vlan_tid makes use of headroom available
    in the buffer parameter of rx_recv.
    
    Signed-off-by: Simon Horman <horms at verge.net.au>
    Co-authored-by: Ben Pfaff <blp at nicira.com>
    Signed-off-by: Ben Pfaff <blp at nicira.com>


On Fri, Jun 27, 2014 at 01:01:29PM -0400, Bob Cyphers wrote:
> I'm running
> 
> Ubuntu 12.04.4 with Linux 3.5.0-51-generic
> 
> Open vSwitch 2.1.2
> 
> Intel niantic driver ixgbe 3.21.2
> 
> 
> 
> 
> 
> On Fri, Jun 27, 2014 at 12:54 PM, Ben Pfaff <blp at nicira.com> wrote:
> 
> > On Thu, Jun 26, 2014 at 12:57:54PM -0400, Bob Cyphers wrote:
> > > I'm attempting to test OVS as a gateway between VLAN and MPLS networks,
> > > starting with forwarding frames from one physical port to another.  What
> > I
> > > have observed is that I can't make a rule that matches on VLAN ID (or
> > > dl_type=0x8100) when running userspace datapath.
> > >
> > > Is this the expected behavior with userspace datapath?
> >
> > I seem to recall that some old Linux kernels didn't properly pass
> > VLAN-tagged packets through to userspace.  What kernel version are you
> > using?
> >

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