if len(filename) == 0 {
			filename = "YYY-istio-cni.conf"
		}
		return filepath.Join(cfg.mountedCNINetDir, filename), nil
	}

	watcher, err := util.CreateFileWatcher(cfg.mountedCNINetDir)
	if err != nil {
		return "", err
	}
	defer watcher.Close()

	for len(filename) == 0 {
		filename, err = getDefaultCNINetwork(cfg.mountedCNINetDir)
		if err == nil {
			break
		}