Bug 1012829

Summary:	libvirt should choose the available vf for assignment automatically if the fore vfs are unavaliable
Product:	Red Hat Enterprise Linux 6	Reporter:	Xuesong Zhang <xuzhang>
Component:	libvirt	Assignee:	Laine Stump <laine>
Status:	CLOSED WONTFIX	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.5	CC:	acathrow, dyuan, honzhang
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	1012820	Environment:
Last Closed:	2014-04-04 20:56:50 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1012820
Bug Blocks:

Description Xuesong Zhang 2013-09-27 08:43:22 UTC

+++ This bug was initially created as a clone of Bug #1012820 +++

Description
While the fore VF in the VFpool is not available for assignment, libvirt should choose the next available vf for assignment automatically.

Version:
libvirt-1.1.1-5.el7.x86_64
qemu-kvm-1.5.3-3.el7.x86_64
kernel-3.10.0-23.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1. prepare one hostdev network like the following one:
# virsh net-dumpxml hostnet
<network>
  <name>hostnet</name>
  <uuid>c1fb4ead-21b8-4d69-8ad9-669c55b3dfc7</uuid>
  <forward mode='hostdev' managed='yes'>
    <address type='pci' domain='0x0000' bus='0x03' slot='0x10' function='0x1'/>
    <address type='pci' domain='0x0000' bus='0x03' slot='0x10' function='0x0'/>
  </forward>
</network>

2. prepare one VF xml, the VF is the 1st VF in the vfpool.
# cat vf-hostdev-1.xml
<hostdev mode='subsystem' type='pci' managed='yes'>
  <source>
    <address bus='0x03' slot='0x10' function='0x1'/>
  </source>
</hostdev>

3. hot-plug the vf to the running guest.
# virsh attach-device a vf-hostdev-1.xml 
Device attached successfully

4. prepare one xml like following. 
# cat vf-vfpool.xml 
<interface type='network'>
 <source network='hostnet'/>
</interface>

5. hot-plug the vf in vfpool to guest.
# virsh attach-device a vf-vfpool.xml 
error: Failed to attach device from vf-vfpool.xml
error: Requested operation is not valid: PCI device 0000:03:10.1 is in use by domain a

# virsh attach-device a vf-vfpool.xml 
error: Failed to attach device from vf-vfpool.xml
error: Requested operation is not valid: PCI device 0000:03:10.1 is in use by domain a


Actual results:
in step5, libvirt can't hot-plug other available vf to the guest.


Expected results:
in step5, while the fore vf of the vfpool is not available for hot-plug, libvirt should choose other available vf from the vfpool automatically.


Additional info:

Comment 5 RHEL Program Management 2014-04-04 20:56:50 UTC

Development Management has reviewed and declined this request.
You may appeal this decision by reopening this request.