[libvirt] [PATCH 0/6] add qemu usb-scsi controller support

[Guannan Ren]

On 01/14/2013 05:04 PM, Guannan Ren wrote:
> This patchset tries to add usb-scsi model for SCSI controller.
> http://lists.gnu.org/archive/html/qemu-devel/2012-06/msg03382.html
>
> "usb-uas is a pure UAS (usb attached scsi) emulation.
> The emulation works like any other scsi hba emulation (eps, lsi, virtio,
> megasas, ...).  It provides just the HBA where you can attach scsi
> devices as you like using '-device'.  A single scsi target with up to
> 256 luns is supported. For now only usb 2.0 transport is supported."
>
> libvirt XML snip
>   <devices>
>     <controller type='usb' index='2' model='ehci'>
>     </controller>
>     <controller type='scsi' index='0' model='usb-scsi'>
>       <address type='usb' bus='2' port='1'/>
>     </controller>
>   </devices>
>
> qemu commandline:
> qemu ${other_vm_args}              \
>       -device usb-ehci,id=usb2,bus=pci.0,addr=0x8 \
>       -device usb-uas,id=scsi0,bus=usb2.0,port=1
>
> When a scsi disk is attached to usb-scsi controller, the target
> id must 0(usb-scsi only provide one scsi target). The unit value
> must in range of 0~255 for its lun number.
>
> As for the guest, the kernel with CONFIG_USB_UAS=y is necessary to have it show up
> scsi disk attached to UAS. Fedora has the kernel driver disabled by default though.
> (thanks to Gerd Hoffmann's suggestion)
> I grabbed linux-3.7.1 version from kernel website. It works after compiling.
>
>

       There is no good chipset or vendor name for usb-uas virtual device.
       idVendor is QEMU. ( 46f4)
       idProduct is "USB Attached SCSI HBA" (0003)

       For the name of this scsi model in XML, any opinion is welcome.
       If no other opinion, the usb-uas will be chosen (usb-scsi in this 
patchset)
       I am going to send a v2 with this fix.

       Guannan
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