[libvirt] [PATCH]: Fix Qemu CD-ROM with no source

[Daniel P. Berrange]

On Tue, Jul 29, 2008 at 11:14:07AM +0100, Daniel P. Berrange wrote:
> On Tue, Jul 29, 2008 at 12:07:37PM +0200, Chris Lalancette wrote:
> > The new generic domain re-factor introduced a small regression into the drive
> > handling code.  In particular, if you had a section of XML like:
> > 
> >     <disk type='file' device='cdrom'>
> >       <target dev='hdc' bus='ide'/>
> >       <readonly/>
> >     </disk>
> > 
> > This used to work with older libvirt, but now fails.  This is because we are
> > actually passing the literal string (null) to the qemu command-line, which qemu
> > barfs on.  This patch fixes it up by making it blank, which allows qemu to
> > continue on it's merry way.
> > 
> > Signed-off-by: Chris Lalancette <clalance at redhat.com>
> 
> ACK, looks fine. The other branch for QEMU without -drive, will simply
> omit the '-cdrom' arg, which is correct behaviour because QEMU adds an
> implicit CDROM device in that case.

Oh, btw, if you have the time, could you also cook up the data files
for tests/qemuxml2argvdata/  to allow us to validate this behaviour
in the test suite.


Daniel
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