[virt-tools-list] [PATCH 0/2] add USB redirection support in virt-manager

[Guannan Ren]

On 06/25/2013 01:52 AM, Hans de Goede wrote:


>> Add "Select USB devices to redirect" option in console viewer
>> Initialize and embed UsbDeviceWidget object from SpiceClientGtk into
>> a dialog to let user choose available USB devices for redirection.
>> Throw an error message if USB connection failed.
>>
>> These feature works well if running virt-manager application with
>> super root privilege. But if running it with non-root user, libusb
>> will report Permission problem as follows.
>>
>> libusbx: error [op_open] libusbx couldn't open USB device 
>> /dev/bus/usb/002/010: Permission denied.
>> libusbx: error [op_open] libusbx requires write access to USB device 
>> nodes.
>>
>> I am not sure about this, the error explains itself. In this case 
>> virt-manager
>> will popup a dialog to show related error from spice-client library.
>
> That should not happen, spice-gtk will invoke
> /usr/libexec/spice-gtk-x86_64/spice-client-glib-usb-acl-helper
>
> Which is a suid root binary, that will call into pollkit to ask if it 
> is ok to
> change rights on the device node, and then change the rights on the 
> device node
> (the default polkit policy is allow local).
>
> If this is not working for you something is wrong with your spice-gtk 
> installation,
> for starters check the helper binary is properly suid-root.
>
> And if you compiled from source, re-run ./configure and ensure that 
> nothing
> is missing.
>

      Yeah. I missed polkit-devel, so the helper program didn't compile.
      After recompiling spice-gtk, it works well. Thanks.

      Guannan