Re: [PATCH 3/3] qemu: Auto-generate controller for hotplugged hostdev

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On 10/08/2013 02:45 PM, Eric Farman wrote:
> If a SCSI hostdev is included in an initial domain XML, without a
> corresponding controller statement, one is created silently when the
> guest is booted.
> 
> When hotplugging a SCSI hostdev, a presumption is that the controller
> is already present in the domain either from the original XML, or via
> an earlier hotplug.
> 
>   [root@xxxxxxxx ~]# cat disk.xml
>   <hostdev mode='subsystem' type='scsi'>
>     <source>
>       <adapter name='scsi_host0'/>
>       <address bus='0' target='3' unit='1088438288'/>
>     </source>
>   </hostdev>
>   [root@xxxxxxxx ~]# virsh attach-device guest01 disk.xml
>   error: Failed to attach device from disk.xml
>   error: internal error: unable to execute QEMU command 'device_add': Bus 'scsi0.0' not found
> 
> Since the infrastructure is in place, we can also create a controller
> silently for use by the hotplugged hostdev device.
> 
> Signed-off-by: Eric Farman <farman@xxxxxxxxxxxxxxxxxx>
> ---
>  src/qemu/qemu_hotplug.c |    5 +++++
>  1 file changed, 5 insertions(+)
> 

ACK

Jan


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