extern int device_get_timeout(struct udev_device *udev_device);
extern int device_set_timeout(struct udev_device *udev_device, int timeout);
extern int device_set_devnum(struct udev_device *udev_device, dev_t devnum);
extern int device_get_timeout(struct udev_device *udev_device);
extern int device_set_timeout(struct udev_device *udev_device, int timeout);
extern int device_set_devnum(struct udev_device *udev_device, dev_t devnum);