if pod.Spec.NodeName == "" {
			continue
		}

		for _, v := range pod.Spec.Volumes {
			if v.PersistentVolumeClaim == nil {
				continue
			}

			key := framework.GetNamespacedName(pod.Namespace, v.PersistentVolumeClaim.ClaimName)
			usedPVCSet.Insert(key)
		}
	}
	return usedPVCSet
}

// getNodeImageStates returns the given node's image states based on the given imageExistence map.

	uid := string(pod.UID)
	if len(uid) == 0 {
		return "", errors.New("cannot get cache key for pod with empty UID")
	}
	return uid, nil
}

// GetNamespacedName returns the string format of a namespaced resource name.
func GetNamespacedName(namespace, name string) string {
	return fmt.Sprintf("%s/%s", namespace, name)
}

// DefaultBindAllHostIP defines the default ip address used to bind to all host.

func (pl *VolumeRestrictions) calPreFilterState(ctx context.Context, pod *v1.Pod, pvcs sets.Set[string]) (*preFilterState, error) {
	conflictingPVCRefCount := 0
	for pvc := range pvcs {
		key := framework.GetNamespacedName(pod.Namespace, pvc)
		if pl.sharedLister.StorageInfos().IsPVCUsedByPods(key) {
			// There can only be at most one pod using the ReadWriteOncePod PVC.
			conflictingPVCRefCount += 1
		}
	}