[libvirt-users] Hotplug of disk devices in LXC failed with libvirt of version 1.0.2

Hi Daniel, I noticed that the patch "Add support for hotplug/unplug of disk devices in LXC" you wrote had been merged into libvirt of version 1.0.2. But when I used this function, it report an error with details as following: ubuntu@lxc:~$ vir attach-device instance-0000002c disk.xml --config error: Failed to attach device from disk.xml error: Unable to create device /proc/18377/root/dev/sdb: Permission denied ubuntu@lxc:~$ vir attach-device instance-0000002c disk.xml error: Failed to attach device from disk.xml error: Unable to create device /proc/18377/root/dev/sdb: Permission denied ubuntu@lxc:~$ cat disk.xml <disk type='block' device='disk'> <driver type='raw' cache='none'/> <source dev='/dev/dm-0'/> <target dev='sdb' bus='scsi'/> </disk> ubuntu@lxc:~$ ll /dev/dm-0 brw-rw---- 1 root disk 252, 0 Jul 15 03:39 /dev/dm-0 ubuntu@lxc:~$ dpkg -l|grep libvirt ii libvirt-bin 1.0.2-0ubuntu11 programs for the libvirt library ii libvirt0 1.0.2-0ubuntu11 library for interfacing with different virtualization systems ii python-libvirt 1.0.2-0ubuntu11 libvirt Python bindings And in this lxc vm, through dmesg the following information can be seen: ubuntu@lxc2:~$ dmesg [433287.227288] type=1400 audit(1373874475.861:55): apparmor="DENIED" operation="mknod" info="Failed name lookup" error=-13 parent=1 profile="/usr/sbin/libvirtd" name="dev/sdb" pid=1541 comm="libvirtd" requested_mask="c" denied_mask="c" fsuid=0 ouid=0 What's the real problem and How can I fix it. I really appreciate your help. Thanks! -------------- Best regards! GuanQiang 2013-07-15