klog.V(5).InfoS(attachedVolume.GenerateMsgDetailed("Starting operationExecutor.UnmountDevice", ""))
				err := rc.operationExecutor.UnmountDevice(
					attachedVolume.AttachedVolume, rc.actualStateOfWorld, rc.hostutil)
				if err != nil && !isExpectedError(err) {
					klog.ErrorS(err, attachedVolume.GenerateErrorDetailed(fmt.Sprintf("operationExecutor.UnmountDevice failed (controllerAttachDetachEnabled %v)", rc.controllerAttachDetachEnabled), err).Error())

}

// DeviceUnmounter can unmount a block volume from the global path.
type DeviceUnmounter interface {
	// UnmountDevice unmounts the global mount of the disk. This
	// should only be called once all bind mounts have been
	// unmounted.
	UnmountDevice(deviceMountPath string) error

	pdName := "pd-volume"

	// Act
	for i := range attachedVolumes {
		attachedVolumes[i] = AttachedVolume{
			VolumeName: v1.UniqueVolumeName(pdName),
			NodeName:   "node-name",
		}
		oe.UnmountDevice(attachedVolumes[i], nil /* actualStateOfWorldMounterUpdater */, nil /* mount.Interface */)
	}

	// Assert
	if !isOperationRunSerially(ch, quit) {
		t.Fatalf("Unmount device operations should not start concurrently")

	UnmountVolume(volumeToUnmount MountedVolume, actualStateOfWorld ActualStateOfWorldMounterUpdater, podsDir string) error

	// If a volume has 'Filesystem' volumeMode, UnmountDevice unmounts the
	// volumes global mount path from the device (for attachable volumes only,
	// freeing it for detach. It then updates the actual state of the world to
	// reflect that.
	//

	mounter := plugin.host.GetMounter(plugin.GetPluginName())
	return mounter.GetMountRefs(deviceMountPath)
}

var _ volume.DeviceUnmounter = &deviceMounter{}

func (dm *deviceMounter) UnmountDevice(deviceMountPath string) error {
	// If the local PV is a block device,
	// The deviceMountPath is generated to the format like :/var/lib/kubelet/plugins/kubernetes.io/local-volume/mounts/localpv.spec.Name;

		// pod B with context beta_t is already scheduled on the same node,
		// using the same volumes
		// The volumes from Pod A must be fully unmounted (incl. UnmountDevice)
		// and mounted with new SELinux mount options for pod B.
		// Without SELinux, kubelet can (and often does) reuse device mounted
		// for A.
		return vol.effectiveSELinuxMountFileLabel == seLinuxMountContext
	}