err = dm.mounter.FormatAndMount(devicePath, deviceMountPath, fstype, mountOptions)
	if err != nil {
		if rmErr := os.Remove(deviceMountPath); rmErr != nil {
			klog.Warningf("local: failed to remove %s: %v", deviceMountPath, rmErr)
		}
		return fmt.Errorf("local: failed to mount device %s at %s (fstype: %s), error %w", devicePath, deviceMountPath, fstype, err)
	}

	pwx, readOnly, err := getVolumeSource(spec)
	if err != nil {
		return nil, err
	}

	volumeID := pwx.VolumeID
	fsType := pwx.FSType

	return &portworxVolumeMounter{
		portworxVolume: &portworxVolume{
			podUID:          podUID,
			volName:         spec.Name(),
			volumeID:        volumeID,
			manager:         manager,

		//Add volume metrics
		iscsiDisk.MetricsProvider = volume.NewMetricsStatFS(iscsiDisk.GetPath())
	}
	return &iscsiDiskMounter{
		iscsiDisk:    iscsiDisk,
		fsType:       fsType,
		readOnly:     readOnly,
		mounter:      &mount.SafeFormatAndMount{Interface: mounter, Exec: exec},
		exec:         exec,
		deviceUtil:   ioutil.NewDeviceHandler(ioutil.NewIOHandler()),
		mountOptions: ioutil.MountOptionFromSpec(spec),
	}, nil

	if err != nil {
		return nil, err
	}

	klog.V(5).Infof("fc: newMounterInternal volumeMode %s", volumeMode)
	return &fcDiskMounter{
		fcDisk:       fcDisk,
		fsType:       fc.FSType,
		volumeMode:   volumeMode,
		readOnly:     readOnly,
		mounter:      &mount.SafeFormatAndMount{Interface: mounter, Exec: exec},
		deviceUtil:   util.NewDeviceHandler(util.NewIOHandler()),

// On success a sorted meta cache stream will be returned.
// Metadata has data stripped, if any.
func (s *xlStorage) WalkDir(ctx context.Context, opts WalkDirOptions, wr io.Writer) (err error) {
	legacyFS := !(s.fsType == xfs || s.fsType == ext4)

	s.RLock()
	legacy := s.formatLegacy
	s.RUnlock()

	// Verify if volume is valid and it exists.
	volumeDir, err := s.getVolDir(opts.Bucket)
	if err != nil {
		return err
	}

}

//sys	mount(source string, target string, fstype string, flags uintptr, data *byte) (err error)

func Mount(source string, target string, fstype string, flags uintptr, data string) (err error) {
	// Certain file systems get rather angry and EINVAL if you give
	// them an empty string of data, rather than NULL.
	if data == "" {
		return mount(source, target, fstype, flags, nil)
	}
	datap, err := BytePtrFromString(data)

	// to determine if Kubernetes should modify ownership and permissions of the volume.
	// With the default policy the defined fsGroup will only be applied
	// if a fstype is defined and the volume's access mode contains ReadWriteOnce.
	//
	// +optional
	FSGroupPolicy *FSGroupPolicy `json:"fsGroupPolicy,omitempty" protobuf:"bytes,5,opt,name=fsGroupPolicy"`

		t.Errorf("Expected %v physicalMounter calls during setup, got %v", e, a)
	} else if config.expectedSetupMounts == 1 &&
		(log[0].Action != mount.FakeActionMount || (log[0].FSType != "tmpfs" && log[0].FSType != "hugetlbfs")) {
		t.Errorf("Unexpected physicalMounter action during setup: %#v", log[0])
	}
	physicalMounter.ResetLog()

	// Make an unmounter for the volume

//
//msgp:tuple DiskInfo
type DiskInfo struct {
	Total      uint64
	Free       uint64
	Used       uint64
	UsedInodes uint64
	FreeInodes uint64
	Major      uint32
	Minor      uint32
	NRRequests uint64
	FSType     string
	RootDisk   bool
	Healing    bool
	Scanning   bool
	Endpoint   string
	MountPath  string
	ID         string
	Rotational bool
	Metrics    DiskMetrics

}

const (
	// Common parameter which can be specified in StorageClass to specify the desired FSType
	// Provisioners SHOULD implement support for this if they are block device based
	// Must be a filesystem type supported by the host operating system.
	// Ex. "ext4", "xfs", "ntfs". Default value depends on the provisioner
	VolumeParameterFSType = "fstype"

	ProbeAddOrUpdate ProbeOperation = 1 << iota
	ProbeRemove
)