+int lfsck_fid_alloc(const struct lu_env *env, struct lfsck_instance *lfsck,
+ struct lu_fid *fid, bool locked);
+int lfsck_create_lpf(const struct lu_env *env, struct lfsck_instance *lfsck);
+struct lfsck_instance *lfsck_instance_find(struct dt_device *key, bool ref,
+ bool unlink);
+struct lfsck_component *lfsck_component_find(struct lfsck_instance *lfsck,
+ __u16 type);