[ovs-discuss] Confusing errors in response to incorrectly formed OFPGroupMod

Ben Pfaff blp at ovn.org
Wed Jan 9 20:43:00 UTC 2019

On Tue, Jan 08, 2019 at 04:04:37PM +0300, Artem Gromov wrote:
> Hi,
> OVS sends confusing error message to incorrectly formed OFPGroupMod message
> with OFPGC_ADD command and command_bucket_id set.
> This condition (absence of else keyword and body) is probably the main
> cause:
> https://github.com/openvswitch/ovs/blob/master/lib/ofp-group.c#L2188
> It should be possibly something like "bad groupmod msg" instead of this:
> > 2019-01-08T11:25:17.476Z|00184|ofp_group|WARN|group command bucket id (1)
> > is out of range
> > 2019-01-08T11:25:17.476Z|00185|connmgr|INFO|br0<->tcp:
> > sending OFPGMFC_BAD_BUCKET error reply to OFPT_GROUP_MOD message

I'd like to help, but I don't understand the complaint yet.  It seems to
me that the problem in the group_mod message is the command_bucket_id,
and that both logs messages point that out.  Can you explain why a less
specific message would be more helpful?



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