Bug 1016360 - Better error message for using read only driver as read-write with format probing
Summary: Better error message for using read only driver as read-write with format pro...
Keywords:
Status: CLOSED DEFERRED
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.6
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: ---
Assignee: Fam Zheng
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-10-08 03:04 UTC by Fam Zheng
Modified: 2014-12-15 09:34 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-12-15 09:34:47 UTC
Target Upstream Version:

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Description Fam Zheng 2013-10-08 03:04:57 UTC 
If qemu tries to use a block driver as read write, but it is whitelisted for read-only, the error message is obscure and not instructive.

Actual results:

(configure with --block-drv-ro-whitelist=vmdk and build qemu)
$ qemu-kvm -nodefaults --enable-kvm -S -m 512 -vnc :0 -readconfig test.cfg -drive if=none,file=foo.vmdk
    qemu-kvm: -drive if=none,file=foo.vmdk: could not open disk image foo.vmdk: Operation not supported

A better message should be:

qemu-kvm: -drive if=none,file=foo.vmdk: format 'vmdk' is only supported read-only
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