+
+/* If a particular netdev class does not support offloading flows, all
+these
+ * function pointers must be NULL. */
+
+ /* Deleting all offloaded flows from netdev */
+ int (*flow_flush)(struct netdev *);
+ /* Dumping interface:
+ * Usage is as with dpif_port_dump api (create, next, destory).
+ * Create sets dump on success or returns error status on failure. */
+ int (*flow_dump_create)(struct netdev *, struct netdev_flow_dump
**dump);
+ int (*flow_dump_destroy)(struct netdev_flow_dump *);
+ /* rbuffer is for use of the implementation (e.g using nl_dump),
+ * and is usually shared for the given thread that runs flow_dump_next.
+ * wbuffer is the buffer that dumped actions will be stored in, and given
+ * pointers to. */
+ bool (*flow_dump_next)(struct netdev_flow_dump *, struct match *,
+ struct nlattr **actions,
+ struct dpif_flow_stats *stats, ovs_u128 *ufid,
+ struct ofpbuf *rbuffer, struct ofpbuf
+ *wbuffer);
+
+ /* Offload the given flow (match, actions, stats, ufid) on netdev.
+ * If stats isn't null, sets the given stats for that flow.
+ * To modify the flow, use the same ufid.
+ * actions are in netlink format, as with struct dpif_flow_put.
+ * info is anything else that is need to offload the flow. */
+ int (*flow_put)(struct netdev *, struct match *, struct nlattr *actions,
+ size_t actions_len, struct dpif_flow_stats *,
+ const ovs_u128 *ufid, struct offload_info *info);
+ /* Queries the flow with specified ufid on netdev.
+ * Fills match, actions, stats as with flow_dump_next */
+ int (*flow_get)(struct netdev *, struct match *, struct nlattr **actions,
+ struct dpif_flow_stats *, const ovs_u128 *ufid,
+ struct ofpbuf *);
+ /* Deletes the given flow specified by ufid from netdev.
+ * If stats is not null, fills it with flow stats. */
+ int (*flow_del)(struct netdev *, struct dpif_flow_stats *,
+ const ovs_u128 *ufid);
+ /* Initializies the netdev flow api. */
+ int (*init_flow_api)(struct netdev *);
};
