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Bug 852973 - Migration should not be allowed if the device properties are mismatched between src and dst hosts
Summary: Migration should not be allowed if the device properties are mismatched betwe...
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.4
Hardware: Unspecified
OS: Unspecified
low
low
Target Milestone: rc
: ---
Assignee: Orit Wasserman
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-08-30 07:09 UTC by Qunfang Zhang
Modified: 2014-03-04 00:24 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-09-02 07:37:49 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Qunfang Zhang 2012-08-30 07:09:18 UTC 
Description of problem:
Migration should not be allowed if the device properties are mismatched between src and dst hosts.
For example:
On src host: 
/usr/libexec/qemu-kvm ...  -drive file=/mnt/test.qcow2,if=none,id=drive-virtio-disk1,format=qcow2,cache=none,werror=stop,rerror=stop,aio=native -device virtio-blk-pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk1,id=virtio-disk1

But on dst host: 
... -drive file=/mnt/test.qcow2,if=none,id=drive-virtio-disk2,format=qcow2,cache=none,werror=stop,rerror=stop,aio=native -device virtio-blk-pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk2,id=virtio-disk2 

After migration finished successfully, hot unplug the secondary disk "test.qcow2", failed.
(qemu) device_del drive-virtio-disk2
Device 'drive-virtio-disk2' not found

Version-Release number of selected component (if applicable):
qemu-kvm-0.12.1.2-2.307.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Boot a guest on src host with a system disk and a secondary disk "test.qcow2"
/usr/libexec/qemu-kvm ...  -drive file=/mnt/test.qcow2,if=none,id=drive-virtio-disk1,format=qcow2,cache=none,werror=stop,rerror=stop,aio=native -device virtio-blk-pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk1,id=virtio-disk1

2.Boot the guest on dst host with listening mode but with mismatched device property of the disk "test.qcow2"

... -drive file=/mnt/test.qcow2,if=none,id=drive-virtio-disk2,format=qcow2,cache=none,werror=stop,rerror=stop,aio=native -device virtio-blk-pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk2,id=virtio-disk2 

3. Migrate guest to dst host.
(qemu)migrate -d tcp:$dst_host_ip:5800

4. After migration finished, hot unplug the test.qcow2 disk.
(qemu) info block
drive-virtio-disk0: removable=0 io-status=ok file=/mnt/rhel5.9-32-lcov-2.qcow2 ro=0 drv=qcow2 encrypted=0
drive-virtio-disk2: removable=0 io-status=ok file=/mnt/test.qcow2 ro=0 drv=qcow2 encrypted=0
ide1-cd0: removable=1 locked=0 tray-open=0 io-status=ok [not inserted]
floppy0: removable=1 locked=0 tray-open=0 [not inserted]
sd0: removable=1 locked=0 tray-open=0 [not inserted]

(qemu) device_del drive-virtio-disk2
Device 'drive-virtio-disk2' not found

  
Actual results:
Can not hot unplug the "test.qcow2" disk because the device id is mismatched with src host and can not be found.

Expected results:
Should prompt error before migration if the device property is mismatched. 

Additional info:
Comment 3 Orit Wasserman 2012-09-02 07:37:06 UTC 
We don't support migration when the command line on src and dest are not the same.
Currently in QEMU we can't enforce it, it is management rule to enforce it.
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