Description of problem:

Problem with clone virtual machine, which have attached disk image stored on gluster volume

Version-Release number of selected component (if applicable):
virt-manager 1.3.2

How reproducible:
+ configure new storage with type gluster and name gluster.

Steps to Reproduce:
1. Right click on machine
2. Select clone
3. Enter new name
4. Click storage in section 'Storage'
5. Check new image file location, for example: I have gluster://localhost/vol1/wm32.qcow2
6. Click Ok
7. Click Clone

Actual results:

Uncaught error validating input: [Errno 2] No such file or directory: 'gluster://localhost/vol1'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/clone.py", line 802, in finish
    if not self.validate():
  File "/usr/share/virt-manager/virtManager/clone.py", line 781, in validate
    cd.setup_clone()
  File "/usr/share/virt-manager/virtinst/cloner.py", line 408, in setup_clone
    self._setup_disk_clone_destination(orig_disk, clone_disk)
  File "/usr/share/virt-manager/virtinst/cloner.py", line 361, in _setup_disk_clone_destination
    clone_disk.validate()
  File "/usr/share/virt-manager/virtinst/devicedisk.py", line 848, in validate
    self._storage_backend.validate(self)
  File "/usr/share/virt-manager/virtinst/diskbackend.py", line 292, in validate
    err, msg = self.is_size_conflict()
  File "/usr/share/virt-manager/virtinst/diskbackend.py", line 329, in is_size_conflict
    vfs = os.statvfs(os.path.dirname(self._path))
OSError: [Errno 2] No such file or directory: 'gluster://localhost/vol1'


Expected results:

Expected is create disk image on gluster volume successfully


Additional info:

none