'Retrieve stats info from vserver.'

def _update_volume_stats(self):

    self._ensure_shares_mounted()
    LOG.debug('Updating    volume    stats')
    data = {}
    backend_name = self.configuration.safe_get('volume_backend_name')
    data['volume_backend_name'] = (backend_name or self.driver_name)
    data['vendor_name'] = 'NetApp'
    data['driver_version'] = self.VERSION
    data['storage_protocol'] = 'nfs'
    data['pools'] = self._get_pool_stats(filter_function=self.get_filter_function(), goodness_function=self.get_goodness_function())
    data['sparse_copy_volume'] = True
    self._spawn_clean_cache_job()
    self._stats = data
