Bug 1016360 - Better error message for using read only driver as read-write with format probing
Better error message for using read only driver as read-write with format pro...
Status: CLOSED DEFERRED
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm (Show other bugs)
6.6
Unspecified Unspecified
medium Severity medium
: rc
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Assigned To: Fam Zheng
Virtualization Bugs
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Reported: 2013-10-07 23:04 EDT by Fam Zheng
Modified: 2014-12-15 04:34 EST (History)
9 users (show)

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Last Closed: 2014-12-15 04:34:47 EST
Type: Bug
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Description Fam Zheng 2013-10-07 23:04:57 EDT
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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