librenms-librenms/html/includes/graphs/storage/auth.inc.php

<?php

if (is_numeric($vars['id'])) {
    $storage = dbFetchRow('SELECT * FROM `storage` WHERE `storage_id` = ?', array($vars['id']));

    if (is_numeric($storage['device_id']) && ($auth || device_permitted($storage['device_id']))) {
        $device       = device_by_id_cache($storage['device_id']);
        $rrd_filename = $config['rrd_dir'].'/'.$device['hostname'].'/'.safename('storage-'.$storage['storage_mib'].'-'.$storage['storage_descr'].'.rrd');

        $title  = generate_device_link($device);
        $title .= ' :: Storage :: '.htmlentities($storage['storage_descr']);
        $auth   = true;
    }
}