[libvirt] [PATCHv2 1/4] VMX: Add cdrom-raw dev type from VMWare Fusion

[Doug Goldstein]

On Tue, Aug 27, 2013 at 8:56 AM, Paolo Bonzini <pbonzini at redhat.com> wrote:

> Il 27/08/2013 15:50, Daniel P. Berrange ha scritto:
> > On Thu, Aug 22, 2013 at 08:53:06PM -0500, Doug Goldstein wrote:
> >> According to VMWare's documentation 'cdrom-raw' is an acceptable value
> >> for deviceType for a CD-ROM drive. The documentation states that the VMX
> >> configuration for a CD-ROM deviceType is as follows:
> >>
> >> ide|scsi(n):(n).deviceType = "cdrom-raw|atapi-cdrom|cdrom-image"
> >>
> >> >From the documentation it appears the following is true:
> >> - cdrom-image = Provides the ISO to the VM
> >> - atapi-cdrom = Provides a NEC emulated ATAPI CD-ROM on top of the host
> >>   CD-ROM
> >> - cdrom-raw = Passthru for a host CD-ROM drive. Allows CD-R burning from
> >>   within the guest.
> >>
> >> A CD-ROM prior to this patch would always provide an 'atapi-cdrom' is
> >> modeled as:
> >>   <disk type='block' device='cdrom'>
> >>     <source dev='/dev/scd0'/>
> >>     <target dev='hda' bus='ide'/>
> >>     <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> >>   </disk>
> >>
> >> This patch allows an optional element as:
> >>     <driver name='atapi'/>
> >> that would maintain existing behavior. While:
> >>     <driver name='raw'/>
> >> would provide a 'cdrom-raw' to the VM.
> >
> >
> > The 'cdrom-raw' case sounds very similar to the scenario we addressed
> > in QEMU, by adding support for a 'lun' value in the device attribute.
> >
> > eg I think 'cdrom-raw' could be addressed by supporting
> >
> >    <disk type='block' device='lun'>
> >      <source dev='/dev/scd0'/>
> >      <target dev='hda' bus='ide'/>
> >      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> >    </disk>
> >
> > rather than using <driver>
> >
> > Paolo, you added the 'lun' support - do you agree with this ?
>
> Yes, 100%.
>
> - cdrom-image is type='file' device='cdrom'
> - atapi-cdrom is type='block' device='cdrom'
> - cdrom-raw is type='block' device='lun'
>
> Paolo
>
>
Thanks guys. I'll respin it to device='lun'.

-- 
Doug Goldstein
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