def unmap_volume(name, **kwargs):
if not loaded_module("blktap"):
raise Error("blktap module not loaded")
device = name
try:
if is_device_mapped(device) is not None:
busy = VlmcTapdisk.busy_pid(device)
mounted = VlmcTapdisk.is_mounted(device)
if not busy and not mounted:
VlmcTapdisk.destroy(device)
else:
if busy:
raise Error("Device is busy (PID: %s)." % busy)
elif mounted:
raise Error("Device is mounted. Cannot unmap device.")
return
raise Error("Device doesn't exist")
except Exception, reason:
raise Error(device + ': ' + str(reason))
