return errors.New(log("failed to delete volume path [%s]: %v", volPath, err))
		}
	}
	return nil
}

// makeVolumeHandle returns csi-<sha256(podUID,volSourceSpecName)>
func makeVolumeHandle(podUID, volSourceSpecName string) string {
	result := sha256.Sum256([]byte(fmt.Sprintf("%s%s", podUID, volSourceSpecName)))
	return fmt.Sprintf("csi-%x", result)
}

	if err != nil {
		return nil, err
	}

	var (
		driverName   string
		volumeHandle string
		readOnly     bool
	)

	switch {
	case volSrc != nil:
		volumeHandle = makeVolumeHandle(string(pod.UID), spec.Name())
		driverName = volSrc.Driver
		if volSrc.ReadOnly != nil {
			readOnly = *volSrc.ReadOnly
		}
	case pvSrc != nil:
		driverName = pvSrc.Driver

				t.Fatal("unexpected volume mode: ", csiMounter.volumeLifecycleMode)
			}

			if csiMounter.volumeLifecycleMode == storage.VolumeLifecycleEphemeral && csiMounter.volumeID != makeVolumeHandle(string(tc.podUID), csiMounter.specVolumeID) {
				t.Fatal("unexpected generated volumeHandle:", csiMounter.volumeID)
			}

			if csiMounter.volumeLifecycleMode == storage.VolumeLifecyclePersistent {