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

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 -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


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