extern struct lu_object_operations osp_lu_obj_ops;
extern const struct dt_device_operations osp_dt_ops;
extern struct dt_object_operations osp_md_obj_ops;
extern struct lu_object_operations osp_lu_obj_ops;
extern const struct dt_device_operations osp_dt_ops;
extern struct dt_object_operations osp_md_obj_ops;