Bug 1006650

Summary:	qemu should give a more friendly prompt when didn't specify read-only for VHDX format disk
Product:	Red Hat Enterprise Linux 6	Reporter:	Sibiao Luo <sluo>
Component:	qemu-kvm	Assignee:	Jeff Cody <jcody>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	low	Docs Contact:
Priority:	low
Version:	6.5	CC:	bsarathy, chayang, flang, jcody, juzhang, kwolf, michen, mkenneth, qzhang, rbalakri, virt-maint, xfu
Target Milestone:	rc	Keywords:	TestOnly
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	1006651 (view as bug list)		Environment:
Last Closed:	2014-10-14 06:51:01 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:
Bug Blocks:	1006651

Description Sibiao Luo 2013-09-11 03:15:02 UTC

Description of problem:
boot guest with a VHDX format disk which did not specify read-only, qemu will quit with a "'vhdx' invalid format" prompt, I suggest that QEMU should give a more friendly prompt for users, like: VHDX should use a read-only drive.

Version-Release number of selected component (if applicable):
host info:
2.6.32-414.el6.x86_64
qemu-kvm-0.12.1.2-2.400.el6.x86_64
guet info:
2.6.32-414.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1.create a VHDX image via hyper-V.
2.copy the vhdx image into localhost and boot guest with this VHDX image as a data disk which did not specify read-only for it.
e.g:...-drive file=/home/sluo-win2012-64bit.vhdx,if=none,format=vhdx,id=drive-data-disk,cache=none,werror=stop,rerror=stop -device virtio-blk-pci,bus=pci.0,addr=0x7,drive=drive-data-disk,id=data-disk
qemu-kvm: -drive file=/home/sluo-win2012-64bit.vhdx,if=none,format=vhdx,id=drive-data-disk,cache=none,werror=stop,rerror=stop: 'vhdx' invalid format
/etc/qemu-ifdown: could not launch network script

Actual results:
after step 2, qemu will quit with a "'vhdx' invalid format" prompt.

Expected results:
I suggest that QEMU should give a more friendly prompt for users, like: VHDX should use a read-only drive(just like bug 999788).

Additional info:

Comment 5 Sibiao Luo 2014-07-28 09:19:14 UTC

Verify this issue on qemu-kvm-rhev-0.12.1.2-2.431.el6.x86_64.

host info:
# uname -r && rpm -q qemu-kvm-rhev
2.6.32-493.el6.x86_64
qemu-kvm-rhev-0.12.1.2-2.431.el6.x86_64

e.g.:...-drive file=/home/my-data-disk.vhdx,if=none,format=vhdx,id=drive-data-disk,cache=none,werror=stop,rerror=stop -device virtio-blk-pci,bus=pci.0,addr=0x7,drive=drive-data-disk,id=data-disk
qemu-kvm: -drive file=/home/my-data-disk.vhdx,if=none,format=vhdx,id=drive-data-disk,cache=none,werror=stop,rerror=stop: 'vhdx' can be only used as read-only device.

Best Regards,
sluo

Comment 6 errata-xmlrpc 2014-10-14 06:51:01 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/RHBA-2014-1490.html