[libvirt] Problem with USB pass-through

[Carlos Rodrigues]

Thank you for you answer.

In /proc/bus/usb there is a 002/012 but no 002/014.
I will try upgrade kvm and libvirt and see if that solve my problem.

About now, after reboot physical machine, i can do pass-through USB to
virtual machine without a problems.

But i will keep testing if kvm and libvirt solve the problem.

Many thanks,

Best Regards,

-- 
Carlos Rodrigues <cmar at eurotux.com>
 Investigação e Desenvolvimento
 Eurotux Informática, S.A. [http://eurotux.com]



On Thu, 2012-04-19 at 11:49 -0400, Laine Stump wrote:
> On 04/19/2012 10:44 AM, Carlos Rodrigues wrote:
> > Hello,
> >
> > I have a problem with USB pass-through.
> >
> > I can see the USB device in host machine, i see it in libvirt but when
> > attach to VM i get an error:
> >
> > # lsusb 
> > ...
> > Bus 002 Device 014: ID 0529:0001 Aladdin Knowledge Systems HASP v0.06
> > ...
> >
> > # virsh nodedev-list
> > ...
> > usb_device_529_1_noserial
> > usb_device_529_1_noserial_if0
> > usb_device_529_1_noserial_usbraw
> > ...
> >
> > # virsh dumpxml vm
> > ...
> >
> >     <hostdev mode='subsystem' type='usb' managed='no'>
> >       <source>
> >         <vendor id='0x0529'/>
> >         <product id='0x0001'/>
> >       </source>
> >     </hostdev>
> > ...
> >
> > # cat /var/log/libvirt/qemu/vm.log
> > ...
> > LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin HOME=/
> > QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -S -M pc -m 3800 -smp 4 -name vm
> > -uuid 056dad8b-22a4-4472-cb5e-8cf60215a41b -monitor
> > unix:/var/lib/libvirt/qemu/v,.monitor,server,nowait -boot c -drive
> > file=/dev/vg_sata2/vol_vm,if=virtio,boot=on,format=raw -net
> > nic,macaddr=00:00:00:0b:5b:ec,vlan=0,model=virtio,name=net0 -net
> > tap,fd=21,vlan=0,name=hostnet0 -serial none -parallel none -usb
> > -usbdevice tablet -vnc 0.0.0.0:4 -k pt -vga cirrus -usbdevice
> > host:002.014 -balloon virtio 
> > husb: open device 2.12
> > /proc/bus/usb/002/012: No such file or directory
> > Warning: could not add USB device host:002.014
> > ...
> >
> > I'm using libvirt 0.8.3 with kvm 88.
> >
> > Anyone have see this problem?
> 
> That sounds like this problem:
> 
>   commit 823a684f8d0495bd5e7b413e1a81fd5a600abef7
>   Author: Daniel P. Berrange <berrange at redhat.com>
>   Date:   Thu Feb 11 14:39:13 2010 +0000
> 
>       Fix USB device path formatting mixup
>    
>       * src/util/hostusb.c: The device path for a USB device wants the
>         bus/device IDs in decimal not octal
> 
> but the fix was included in libvirt 0.7.7. What is the output of "find
> /proc/bus/usb"?  I'm guessing that there *is* a 002/014, but no 002/012.
> Since kvm-88's error message lists both, my next guess is that kvm-88
> really *is* expecting the USB device to be given as octal. Are you able
> to upgrade to newer kvm or libvirt? (note that there may be a newer kvm
> available under the package name "qemu-kvm" or even "qemu", depending on
> your distro).
> 
> --
> libvir-list mailing list
> libvir-list at redhat.com
> https://www.redhat.com/mailman/listinfo/libvir-list
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