+int dpif_execute(struct dpif *, const struct nlattr *actions,
+ size_t actions_len, const struct ofpbuf *);
+
+/* A packet passed up from the datapath to userspace.
+ *
+ * If 'key' or 'actions' is nonnull, then it points into data owned by
+ * 'packet', so their memory cannot be freed separately. (This is hardly a
+ * great way to do things but it works out OK for the dpif providers and
+ * clients that exist so far.)
+ */
+struct dpif_upcall {
+ uint32_t type; /* One of _ODPL_*_NR. */
+
+ /* All types. */
+ struct ofpbuf *packet; /* Packet data. */
+ struct nlattr *key; /* Flow key. */
+ size_t key_len; /* Length of 'key' in bytes. */
+
+ /* _ODPL_ACTION_NR only. */
+ uint64_t userdata; /* Argument to ODPAT_CONTROLLER. */
+
+ /* _ODPL_SFLOW_NR only. */
+ uint32_t sample_pool; /* # of sampling candidate packets so far. */
+ struct nlattr *actions; /* Associated flow actions. */
+ size_t actions_len;
+};
+
+int dpif_recv_get_mask(const struct dpif *, int *listen_mask);
+int dpif_recv_set_mask(struct dpif *, int listen_mask);
+int dpif_get_sflow_probability(const struct dpif *, uint32_t *probability);
+int dpif_set_sflow_probability(struct dpif *, uint32_t probability);
+int dpif_recv(struct dpif *, struct dpif_upcall *);
+void dpif_recv_purge(struct dpif *);