+ /* Retrieves spanning tree protocol (STP) port statistics of 'ofport'.
+ *
+ * Stores STP state for 'ofport' in 's'. If the 'enabled' member is
+ * false, the other member values are not meaningful.
+ *
+ * EOPNOTSUPP as a return value indicates that this ofproto_class does not
+ * support STP, as does a null pointer. */
+ int (*get_stp_port_stats)(struct ofport *ofport,
+ struct ofproto_port_stp_stats *s);
+