Re: [Xen-devel] Bug in usbdevices option handling when BusID=8

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Mon, Aug 5, 2013 at 8:20 PM, Gordan Bobic <gordan@xxxxxxxxxx> wrote:
> On 08/05/2013 02:22 PM, George Dunlap wrote:
>>
>> On Mon, Aug 5, 2013 at 8:29 AM, Ian Campbell <Ian.Campbell@xxxxxxxxxx>
>> wrote:
>>>
>>> On Sun, 2013-08-04 at 12:08 +0100, Gordan Bobic wrote:
>>>>
>>>> At a glance, this looks like something buggy happens when BusID=8. It
>>>> sees that the device is host:008.002, but then goes and tries to open
>>>> /dev/bus/usb/000/002 instead of /dev/bus/usb/008/002.
>>>
>>>
>>> Smells like a bitmask gone wrong somewhere, or something like that.
>>>
>>> xl/libxl doesn't really do much with the string which you passed in so
>>> it should be going straight to qemu unmodified. You ought to be able to
>>> see this in the logs I think.
>>
>>
>> Or using ps -ax -- what does that show the command-line to be?
>
>
> It looks like a qemu-traditional (qemu-dm) issue:
>
> # grep usb /var/log/xen/qemu-dm-edi.log
>
> husb: open device 0.2
> /dev/bus/usb/000/002: No such file or directory
>
> # ps auxw | grep qemu
> root      8364  4.4  0.0 239132  8880 ?        SLsl 20:16   0:07
> /usr/lib/xen/bin/qemu-dm -d 1 -domain-name edi -vnc 127.0.0.1:0 -vncunused
> -k en-gb -serial pty -videoram 8 -std-vga -boot c -usb -usbdevice
> host:008.002 -acpi -vcpus 8 -vcpu_avail 0xff -net
> nic,vlan=0,macaddr=00:16:3e:4e:c5:0c,model=e1000 -net
> tap,vlan=0,ifname=vif1.0-emu,bridge=br0,script=no,downscript=no -M xenfv

Could you test qemu-xen with configuration, to test to see if it
works?  If it doesn't we probably need to report this upstream --
otherwise it's just a matter of fixing it in our tree.

 -George

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