def make_udf(self, user=None, path=None, status=STATUS_LIVE):
"""Create a UDF node."""
if user is None:
user = self.make_user()
if path is None:
path = '~/' + self.get_unique_unicode()
udf = UserVolume.create(self.store, user.id, path)
udf.status = status
return udf
