func (s *NetServer) getOrOpenNetns(pod *corev1.Pod, netNs string) (Netns, error) {
	if netNs == "" {
		return s.getNetns(pod)
	}
	return s.openNetns(pod, netNs)
}

func (s *NetServer) openNetns(pod *corev1.Pod, netNs string) (Netns, error) {
	return s.currentPodSnapshot.UpsertPodCache(pod, netNs)
}

func (s *NetServer) getNetns(pod *corev1.Pod) (Netns, error) {
	openNetns := s.currentPodSnapshot.Get(string(pod.UID))

	}

	return nil
}

// The buffer must be at least a block long.
// refer https://github.com/golang/go/issues/24015
const blockSize = 8 << 10 // 8192

// By default at least 128 entries in single getdents call (1MiB buffer)
var (
	direntPool = sync.Pool{
		New: func() interface{} {
			buf := make([]byte, blockSize*128)
			return &buf
		},
	}

	direntNamePool = sync.Pool{