def METHOD_NAME(self):
    self.ssh_command('bash /mnt/host/cleanup.sh /mnt/host/scratch')
    # It would be nice if the above was sufficient to make virtiofsd clear
    # all references to the mounted directories (so they can be unmounted
    # on the host), but unfortunately it is not.  To do so, we have to
    # resort to a remount.
    self.ssh_command('mount -o remount /mnt/host')
    scratch_dir = os.path.join(self.shared_dir, 'scratch')
    self.run(('bash', self.get_data('cleanup.sh'), scratch_dir))