[libvirt] [PATCH/RFC]: file backed usb massstorage #2

Hi, attached is a second version of the usb massstorage patch: Changes are: * use sd* dummy dev names instead of usbdisk * move the check for the "subtype" (hard disk/cdrom/...) into the driver An example is: <disk type='file' device='disk'> <target dev="sda" bus='usb'/> <source file='/foo/bar/usbmass.img'/> </disk> Patch is on top of the hostdev passthrough patch. Cheers, -- Guido