PathIsDevice(pathname string) (bool, error)
	// GetDeviceNameFromMount finds the device name by checking the mount path
	// to get the global mount path within its plugin directory.
	// TODO: Remove this method once the rbd and vsphere plugins are removed from in-tree.
	GetDeviceNameFromMount(mounter mount.Interface, mountPath, pluginMountDir string) (string, error)
	// MakeRShared checks that given path is on a mount with 'rshared' mount