libvirt - Permission Denied

Errors encountered while removing certain storage devices.

cannot unlink file '/var/lib/libvirt/images/openfiler.qcow2': Permission denied
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/delete.py", line 182, in _async_delete
    self._async_delete_path(conn, path, meter)
  File "/usr/share/virt-manager/virtManager/delete.py", line 228, in _async_delete_path
    vol.delete(0)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3359, in delete
    if ret == -1: raise libvirtError ('virStorageVolDelete() failed', vol=self)
libvirtError: cannot unlink file '/var/lib/libvirt/images/openfiler.qcow2': Permission denied

cannot unlink file '/var/lib/libvirt/images/openfiler-1.qcow2': Permission denied
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/delete.py", line 182, in _async_delete
    self._async_delete_path(conn, path, meter)
  File "/usr/share/virt-manager/virtManager/delete.py", line 228, in _async_delete_path
    vol.delete(0)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3359, in delete
    if ret == -1: raise libvirtError ('virStorageVolDelete() failed', vol=self)
libvirtError: cannot unlink file '/var/lib/libvirt/images/openfiler-1.qcow2': Permission denied

cannot unlink file '/var/lib/libvirt/images/openfiler-4.qcow2': Permission denied
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/delete.py", line 182, in _async_delete
    self._async_delete_path(conn, path, meter)
  File "/usr/share/virt-manager/virtManager/delete.py", line 228, in _async_delete_path
    vol.delete(0)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3359, in delete
    if ret == -1: raise libvirtError ('virStorageVolDelete() failed', vol=self)
libvirtError: cannot unlink file '/var/lib/libvirt/images/openfiler-4.qcow2': Permission denied

cannot unlink file '/var/lib/libvirt/images/openfiler-5.qcow2': Permission denied
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/delete.py", line 182, in _async_delete
    self._async_delete_path(conn, path, meter)
  File "/usr/share/virt-manager/virtManager/delete.py", line 228, in _async_delete_path
    vol.delete(0)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3359, in delete
    if ret == -1: raise libvirtError ('virStorageVolDelete() failed', vol=self)
libvirtError: cannot unlink file '/var/lib/libvirt/images/openfiler-5.qcow2': Permission denied