mode:   storage.VolumeLifecyclePersistent,
			fsType: "zfs",
			spec: func(fsType string, options []string) *volume.Spec {
				pvSrc := makeTestPV("pv1", 20, testDriver, "vol1")
				pvSrc.Spec.CSI.FSType = fsType
				pvSrc.Spec.MountOptions = options
				return volume.NewSpecFromPersistentVolume(pvSrc, false)
			},
		},
		{
			name:   "setup with persistent source without unspecified fstype and options",

}

// GetCSIDriverName returns the csi driver name
func GetCSIDriverName(spec *volume.Spec) (string, error) {
	volSrc, pvSrc, err := getSourceFromSpec(spec)
	if err != nil {
		return "", err
	}

	switch {
	case volSrc != nil:
		return volSrc.Driver, nil
	case pvSrc != nil:
		return pvSrc.Driver, nil
	default:
		return "", errors.New(log("volume source not found in volume.Spec"))
	}
}

		klog.Error(log("attacher.Attach missing volume.Spec"))
		return "", errors.New("missing spec")
	}

	pvSrc, err := getPVSourceFromSpec(spec)
	if err != nil {
		return "", errors.New(log("attacher.Attach failed to get CSIPersistentVolumeSource: %v", err))
	}

	node := string(nodeName)
	attachID := getAttachmentName(pvSrc.VolumeHandle, pvSrc.Driver, node)

	attachment, err := c.plugin.volumeAttachmentLister.Get(attachID)

		}
	case pvSrc != nil:
		if c.volumeLifecycleMode != storage.VolumeLifecyclePersistent {
			return fmt.Errorf("unexpected driver mode: %s", c.volumeLifecycleMode)
		}

		fsType = pvSrc.FSType

		volAttribs = pvSrc.VolumeAttributes

		if pvSrc.NodePublishSecretRef != nil {
			secretRef = pvSrc.NodePublishSecretRef
		}

		driverName = volSrc.Driver
		if volSrc.ReadOnly != nil {
			readOnly = *volSrc.ReadOnly
		}
	case pvSrc != nil:
		driverName = pvSrc.Driver
		volumeHandle = pvSrc.VolumeHandle
		readOnly = spec.ReadOnly
	default:
		return nil, errors.New(log("volume source not found in volume.Spec"))
	}

	volumeLifecycleMode, err := p.getVolumeLifecycleMode(spec)
	if err != nil {

		shouldFail          bool
	}{
		{
			name:       "mounter with missing spec",
			shouldFail: true,
		},
		{
			name: "mounter with spec with both volSrc and pvSrc",
			spec: &volume.Spec{
				Volume:           makeTestVol("test-vol1", testDriver),
				PersistentVolume: makeTestPV("test-pv1", 20, testDriver, testVol),
				ReadOnly:         true,
			},
			shouldFail: true,