+ /* Gets the MPIDs of the remote maintenance points broadcasting to
+ * 'ofport'. Populates 'rmps' with a provider owned array of MPIDs, and
+ * 'n_rmps' with the number of MPIDs in 'rmps'. Returns a number less than
+ * 0 if CFM is not enabled of 'ofport'.
+ *
+ * This function may be a null pointer if the ofproto implementation does
+ * not support CFM. */
+ int (*get_cfm_remote_mpids)(const struct ofport *ofport,
+ const uint64_t **rmps, size_t *n_rmps);
+
+ /* Configures spanning tree protocol (STP) on 'ofproto' using the
+ * settings defined in 's'.
+ *
+ * If 's' is nonnull, configures STP according to its members.
+ *
+ * If 's' is null, removes any STP configuration from 'ofproto'.
+ *
+ * EOPNOTSUPP as a return value indicates that this ofproto_class does not
+ * support STP, as does a null pointer. */
+ int (*set_stp)(struct ofproto *ofproto,
+ const struct ofproto_stp_settings *s);
+
+ /* Retrieves state of spanning tree protocol (STP) on 'ofproto'.
+ *
+ * Stores STP state for 'ofproto' 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_status)(struct ofproto *ofproto,
+ struct ofproto_stp_status *s);
+
+ /* Configures spanning tree protocol (STP) on 'ofport' using the
+ * settings defined in 's'.
+ *
+ * If 's' is nonnull, configures STP according to its members. The
+ * caller is responsible for assigning STP port numbers (using the
+ * 'port_num' member in the range of 1 through 255, inclusive) and
+ * ensuring there are no duplicates.
+ *
+ * If 's' is null, removes any STP configuration from 'ofport'.
+ *
+ * EOPNOTSUPP as a return value indicates that this ofproto_class does not
+ * support STP, as does a null pointer. */
+ int (*set_stp_port)(struct ofport *ofport,
+ const struct ofproto_port_stp_settings *s);
+
+ /* Retrieves spanning tree protocol (STP) port status 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_status)(struct ofport *ofport,
+ struct ofproto_port_stp_status *s);
+