[ovs-dev] Bug#763428: Bug#763428: Bug#763428: openvswitch-switch: openvswitch doesn't work anymore since kernel 3.16 update

[Ben Pfaff]

On Wed, Oct 08, 2014 at 11:51:25AM -0700, Madhu Challa wrote:
> I tried the latest ovs with linux-next openvswitch.ko and the one from
> latest ovs.
> 
> I see no errors in when I use the driver from latest ovs.
> 
> When I use the in kernel driver I see this error :
> 
> [ 2497.408140] openvswitch: netlink: Key attribute has unexpected length
> (type=21, length=4, expected=0).
> 
> when adding the bridge.
> 
> And this is because in the latest ovs attr 21 is OVS_KEY_ATTR_MPLS

This is an expected message.  It does not indicate a problem.  It is
suppressed on recent master via a special attribute.

> whereas with the openvswitch.ko coming from linux-next attr 21
> is OVS_KEY_ATTR_TUNNEL_INFO.
> 
> Note that in the latest ovs attr OVS_KEY_ATTR_TUNNEL_INFO is changed to 22.

OVS_KEY_ATTR_TUNNEL_INFO is only used within the kernel module.  It's
not exported to userspace.