Bug 1186928

Summary: libvirtd with virtio fails with virNetDevMacVLanCreateWithVPortProfile flag
Product: [Community] Virtualization Tools Reporter: Sergey Zemtsov <szemtsov>
Component: libvirtAssignee: Libvirt Maintainers <libvirt-maint>
Status: CLOSED NEXTRELEASE QA Contact:
Severity: urgent Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: jtomko, rbalakri
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Hardware: x86_64   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2015-01-29 13:21:15 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Sergey Zemtsov 2015-01-28 21:39:15 UTC 
Description of problem:

Cannot start domains with virtio driver defined using libvirtd version 1.2.9

With error message below:

Unable to complete install: 'unsupported flags (0x1) in function virNetDevMacVLanCreateWithVPortProfile'




Version-Release number of selected component (if applicable):
# libvirtd --version

 libvirtd (libvirt) 1.2.9

How reproducible:

To start any virtual machine 
using virtio driver, 
I.e selected from virt-manager network devices  drop-down list.



Steps to Reproduce:
1.
create virtual machine (domain) with network device using virtio driver
2.
virsh start <domain>



Actual results:

Unable to complete install: 'unsupported flags (0x1) in function virNetDevMacVLanCreateWithVPortProfile'

Expected results:

Domain running


Additional info:

the bug comes out from gplhost openstack juno repository after libvirt 1.2.8 version was changed to 1.2.9
Comment 1 Ján Tomko 2015-01-29 09:08:38 UTC 
That libvirt was compiled without macvtap support.

I have sent an upstream patch which should result in a better error message:
https://www.redhat.com/archives/libvir-list/2015-January/msg01041.html
Comment 2 Sergey Zemtsov 2015-01-29 11:46:32 UTC 
Thank you. I will try patch given. 

However error message comes out with binary libvirtd from gplhost repository. Was it built without macvtap? And other drivers from virt-manager list are working with macvtap but virtio.
Comment 3 Ján Tomko 2015-01-29 13:21:15 UTC 
The fix for the error message has been pushed upstream:
commit 08d1ae16d6d7264d5597fea61a87a9a3340cd43d
CommitDate: 2015-01-29 10:06:56 +0100

    Remove flag checking in MacVLanCreate helper stub
    
    When compiling without WITH_MACVTAP, we can get:
    'unsupported flags (0x1) in function
    virNetDevMacVLanCreateWithVPortProfile'
    on an attempt to start a domain.
    
    Remove the flag check to reach the more helpful error:
    Cannot create macvlan devices on this platform
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1186928

git describe: v1.2.12-40-g08d1ae1

This has no effect on functionality, there's no reason to try the patch.
The fix is to rebuild libvirt --with-macvtap
Comment 4 Sergey Zemtsov 2015-01-29 16:33:45 UTC 
This works for me. 

But 1st it means version in juno repository is compiled without macvtap. 2nd, in virt-manager 0.9.1 macvtap is missed after reinstallation of daemon. I do not care because it works as "source device Direct " , device model "virtio".  But certain confusion exists.