On 12/17/2013 02:47 AM, Jianwei Hu wrote:
Hi guys,
I want to attach a few USB disks to specified USB controller in domain on libvirt layer, but I didn't find any method to deal with it. Anyone can help me on that?
I added some USB type disk to my domain, started it, I found all USB disk had been attached to same USB controller automatically, I want to assign some USB disks to another controller manually but I can't find the entry. qemu-kvm has provided command line to support it by using "bus" argument.(like: device_add usb-storage,id=my_usb_disk,drive=my_usb_disk,bus=usb.0 )
Action steps: 1. Add some USB disks to domain xml, <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/usb-img/usb-1.img'/> <target dev='sda' bus='usb'/> <alias name='usb-disk0'/> </disk>
To force the guest to see the device under a particular UBS controller, you need to include an <address> designation in your XML. Check the 'virsh dumpxml' output to see what <address> got autogenerated for your use case, then adjust the bus number in that address to instead point to the controller number you want it associated with. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org