Bug 720905

Summary: Unable to add another hadrware after adding PCI device for eth0 to a virt guest
Product: Red Hat Enterprise Linux 6 Reporter: Eduard Benes <ebenes>
Component: virt-managerAssignee: Cole Robinson <crobinso>
Status: CLOSED INSUFFICIENT_DATA QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: high    
Version: 6.1CC: mzhan, rwu
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-09-22 15:05:46 UTC Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Eduard Benes 2011-07-13 08:11:25 UTC 
Description of problem:
It is not possible to add a new hardware to a virt guest after PCI device for eth0 has been assigned already to a virt guest. The system is configure for PCI device assignement [1], so far untested on a system without active VT-d extensions.

Version-Release number of selected component (if applicable):
virt-manager-0.8.6-4.el6.noarch
libvirt-0.8.7-18.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1. Configure system for PCI device assignement by enabling VT-d extensions [1]
2. Add PCI device for eth0 to a virt guest (details -> Add Hardware ...)
3. Try to add another hadware
  
Actual results:
Not able to "add hardware" to a virt guest.
Error messages in /var/log/messages:

Jul 12 08:58:03 dhcp-25-23 libvirtd: 08:58:03.346: 1935: error : interfaceGetXMLDesc:355 : internal error could not get interface XML description (netcf: NETLINK socket operation failed - couldn't find ifindex for interface `eth0`)

Expected results:
Able to "add hardware" to a virt guest.

Additional info:

http://documentation-stage.bne.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html-single/Virtualization/index.html#chap-Virtualization-PCI_passthrough
Comment 1 Cole Robinson 2011-07-20 23:53:50 UTC 
Are you seeing an explicit error message raised? If so please provide it.

Better yet, please provide the full output of virt-manager --debug when reproducing this issue. If the error is occuring when trying to start an existing VM, please provide the contents of /var/log/libvirt/qemu/$vmname.log
Comment 2 Cole Robinson 2011-09-22 15:05:46 UTC 
No info for 2 months, closing as INSUFFICIENT_DATA. If you are still hitting this issue with latest packages, please reopen with the info requested in comment 1.