},
	mremap: mremap,
}

func (m *mremapMmapper) Mremap(oldData []byte, newLength int, flags int) (data []byte, err error) {
	if newLength <= 0 || len(oldData) == 0 || len(oldData) != cap(oldData) || flags&mremapFixed != 0 {
		return nil, EINVAL
	}

	pOld := &oldData[cap(oldData)-1]
	m.Lock()
	defer m.Unlock()
	bOld := m.active[pOld]
	if bOld == nil || &bOld[0] != &oldData[0] {
		return nil, EINVAL
	}

	}

	writeIfNotEqual := func(fileName string, newData []byte) error {
		if newData == nil {
			return nil
		}
		oldData, _ := os.ReadFile(path.Join(dir, fileName))
		if !bytes.Equal(oldData, newData) {
			if err := file.AtomicWrite(path.Join(dir, fileName), newData, certFileMode); err != nil {
				return fmt.Errorf("failed to write data to file %v: %v", fileName, err)
			}
		}

	objCopy := obj.DeepCopyObject()
	if err := r.Record(objCopy); err != nil {
		return nil, err
	}

	oldData, err := json.Marshal(obj)
	if err != nil {
		return nil, err
	}
	newData, err := json.Marshal(objCopy)
	if err != nil {
		return nil, err
	}

	return jsonpatch.CreateMergePatch(oldData, newData)
}

	if newStatus == nil {
		return nil
	}

	oldData, err := json.Marshal(v1.Pod{Status: old.Status})
	if err != nil {
		return err
	}

	newData, err := json.Marshal(v1.Pod{Status: *newStatus})
	if err != nil {
		return err
	}
	patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, &v1.Pod{})
	if err != nil {

	oldData, err := json.Marshal(node)
	if err != nil {
		return err
	}
	setIntAnnotation(node, annotationKey, value)
	newData, err := json.Marshal(node)
	if err != nil {
		return err
	}
	patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, &v1.Node{})
	if err != nil {
		return err
	}

		}

		// The node may appear to have no labels at first,
		// so we wait for it to get hostname label.
		if _, found := n.ObjectMeta.Labels[v1.LabelHostname]; !found {
			return false, nil
		}

		oldData, err := json.Marshal(n)
		if err != nil {
			*lastError = errors.Wrapf(err, "failed to marshal unmodified node %q into JSON", n.Name)
			return false, *lastError
		}

		// Execute the mutating function

		}

		oldData, err := json.Marshal(node)
		if err != nil {
			return fmt.Errorf("failed to marshal the existing node %#v: %v", node, err)
		}
		newData, err := json.Marshal(newNode)
		if err != nil {
			return fmt.Errorf("failed to marshal the new node %#v: %v", newNode, err)
		}
		patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, &v1.Node{})
		if err != nil {

		return ret, nil
	}

	ret.Spec = p.constructPVSourceSpec(volData[volDataKey.specVolID], volData[volDataKey.driverName], volData[volDataKey.volHandle])
	return ret, nil
}

// constructVolSourceSpec constructs volume.Spec with CSIVolumeSource
func (p *csiPlugin) constructVolSourceSpec(volSpecName, driverName string) *volume.Spec {
	vol := &api.Volume{

	}
	return &defaultFile{file}, nil
}

// Rename via os.Rename
func (fs *DefaultFs) Rename(oldpath, newpath string) error {
	if !strings.HasPrefix(oldpath, fs.root) {
		oldpath = fs.prefix(oldpath)
	}
	if !strings.HasPrefix(newpath, fs.root) {
		newpath = fs.prefix(newpath)
	}
	return os.Rename(oldpath, newpath)
}

// MkdirAll via os.MkdirAll
func (fs *DefaultFs) MkdirAll(path string, perm os.FileMode) error {

	if pod == nil {
		return nil
	}

	var (
		oldSpec *api.PodSpec
		oldMeta *metav1.ObjectMeta
	)
	if oldPod != nil {
		oldSpec = &oldPod.Spec
		oldMeta = &oldPod.ObjectMeta
	}
	return warningsForPodSpecAndMeta(nil, &pod.Spec, &pod.ObjectMeta, oldSpec, oldMeta)
}