Re: [Xen-devel] Error connecting USB-device to DomU, kernel 2.6.32-5-xen-amd64, Xen 4.0.1

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Mar 01, 2011 at 09:07:08AM +0100, Hans van Zijst wrote:
> Hi,
> 
> When trying to connect my USB printer to the DomU that has CUPS
> installed, I run into an error:
> 
> Unexpected error: <class 'xen.util.vusb_util.UsbDeviceParseError'>
> 
> Please report to xen-devel@xxxxxxxxxxxxxxxxxxx
> Traceback (most recent call last):
>   File "/usr/lib/xen-4.0/bin/xm", line 8, in <module>
>     main.main(sys.argv)
>   File "/usr/lib/xen-4.0/lib/python/xen/xm/main.py", line 3620, in main
>     _, rc = _run_cmd(cmd, cmd_name, args)
>   File "/usr/lib/xen-4.0/lib/python/xen/xm/main.py", line 3644, in _run_cmd
>     return True, cmd(args)
>   File "/usr/lib/xen-4.0/lib/python/xen/xm/main.py", line 2868, in
> xm_usb_attach
>     if vusb_util.bus_is_assigned(bus):
>   File "/usr/lib/xen-4.0/lib/python/xen/util/vusb_util.py", line 275, in
> bus_is_assigned
>     raise UsbDeviceParseError("Can't get assignment status: (%s)." % bus)
> xen.util.vusb_util.UsbDeviceParseError: vusb: Error parsing USB device
> info: Can't get assignment status: (5-2).
> 
> 
> I'm running Xen 4.0.1 on Debian Wheezy, kernel 2.6.32-5-xen-amd64, both
> on Dom0 and the DomU.
> 
> I tried adding this line to the DomU's configuration:
> 
> vusb = [ 'usbver=2,numports=2,port_1=5-2,port_2=5-3' ]
> 
> which supposedly creates 2 USB ports on the DomU (I found a document on
> the Internet describing PV-USB, but I can't find it anymore...). The
> first port, 5-2, is the one to which the printer is connected.
> 
> After the DomU has booted, I issue "xm list-usb domu" on Dom0, which
> gives me:
> 
> Idx BE  state usb-ver  BE-path
> 0   0   1     USB2.0  /local/domain/0/backend/vusb/14/0
> port 1: 5-2 [ID 03f0:5511 HP Deskjet F300 series]
> port 2: 5-3
> 
> So far, so good. The Dom0 seems to hand the printer to the DomU.
> However, DomU doesn't seem to notice anything. When I do "lsusb" on it,
> it bails out with:
> 
> unable to initialize libusb: -99
> 
> Manually loading the usbcore module and its friends doesn't help.
> 
> Now, if I explicitly connect this thing with:
> 
> xm usb-attach DomU 0 1 5-2
> 
> I get the error mentioned above.
> 
> Any ideas?
> 

I don't think Debian Squeeze 2.6.32 kernel includes Xen PVUSB support/patches.

-- Pasi


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