+ /** This method is used to compare a requested layout to an existing
+ * layout (struct lov_mds_md_v1/3 vs struct lov_mds_md_v1/3) */
+ int (*mdo_lum_lmm_cmp)(const struct lu_env *env,
+ struct md_object *cobj,
+ const struct md_op_spec *spec,
+ struct md_attr *ma);
+