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Bug 747619 - Host PCI device's original states are not honored anymore after deamon is restarted
Summary: Host PCI device's original states are not honored anymore after deamon is res...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: libvirt
Version: 6.3
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Osier Yang
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-10-20 14:17 UTC by Osier Yang
Modified: 2012-06-20 06:35 UTC (History)
7 users (show)

Fixed In Version: libvirt-0.9.9-1.el6
Doc Type: Bug Fix
Doc Text:
No documentation needed.
Clone Of:
Environment:
Last Closed: 2012-06-20 06:35:26 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2012:0748 0 normal SHIPPED_LIVE Low: libvirt security, bug fix, and enhancement update 2012-06-19 19:31:38 UTC

Description Osier Yang 2011-10-20 14:17:40 UTC 
Description of problem:
To support "managed" mode of host PCI device, we record the original
states (unbind_from_stub, remove_slot, and reprobe) so that could
reattach the device to host with original driver. But there is no XML
for theses attrs, and thus after daemon is restarted, we lose the
original states. It's easy to reproduce:

    1) virsh start domain
    2) virsh attach-device dom hostpci.xml (in 'managed' mode)
    3) service libvirtd restart
    4) virsh destroy domain

    You will see the device won't be bound to the original driver
if there was one.

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


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:
Comment 5 Alex Jia 2011-10-28 09:17:54 UTC 
Osier, if virsh attach-device support --persistent option, whether this issue can be resolved?
Comment 6 Alex Jia 2011-10-28 09:30:50 UTC 
I can reproduce this issue on rhel6.2 with libvirt-0.9.4-14.el6_x86_64, although managed mode is yes, the device can't be returned to host after destroying or shutting down the guest.
Comment 8 Osier Yang 2011-11-22 09:32:48 UTC 
patch committed to upstream.
Comment 9 Osier Yang 2012-01-09 08:35:43 UTC 
commit d84b36263c5c54df8ebfaebbe099afec78c14fac
Author: Osier Yang <jyang>
Date:   Thu Oct 20 17:50:10 2011 +0800

    qemu: Restore the original states of PCI device when restarting daemon
    
    To support "managed" mode of host PCI device, we record the original
    states (unbind_from_stub, remove_slot, and reprobe) so that could
    reattach the device to host with original driver. But there is no XML
    for theses attrs, and thus after daemon is restarted, we lose the
    original states. It's easy to reproduce:
    
        1) virsh start domain
        2) virsh attach-device dom hostpci.xml (in 'managed' mode)
        3) service libvirtd restart
        4) virsh destroy domain
    
        You will see the device won't be bound to the original driver
    if there was one.

    ......
Comment 11 weizhang 2012-01-10 09:11:20 UTC 
verify pass on
libvirt-0.9.9-1.el6.x86_64
kernel-2.6.32-225.el6.x86_64
qemu-kvm-0.12.1.2-2.213.el6.x86_64

After restart libvirtd and destroy guest, the pci device will return to host
Comment 12 Osier Yang 2012-05-04 10:03:49 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
No documentation needed.
Comment 14 errata-xmlrpc 2012-06-20 06:35:26 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2012-0748.html
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