ofproto: Avoid user->kernel->user round-trip for many controller actions.

[sliver-openvswitch.git] / lib / dpif.h

diff --git a/lib/dpif.h b/lib/dpif.h
index 216c099..1496c22 100644 (file)
--- a/lib/dpif.h
+++ b/lib/dpif.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,28 +18,39 @@
 #ifndef DPIF_H
 #define DPIF_H 1
 
-/* Operations for the datapath running in the local kernel.  The interface can
- * generalize to multiple types of local datapaths, but the implementation only
- * supports the openflow kernel module. */
-
-#include "openvswitch/datapath-protocol.h"
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
+#include "openflow/openflow.h"
+#include "openvswitch/datapath-protocol.h"
+#include "util.h"
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
 
 struct dpif;
 struct ofpbuf;
 struct svec;
+struct dpif_class;
 
 void dp_run(void);
 void dp_wait(void);
-int dp_enumerate(struct svec *);
 
-int dpif_open(const char *name, struct dpif **);
-int dpif_create(const char *name, struct dpif **);
+int dp_register_provider(const struct dpif_class *);
+int dp_unregister_provider(const char *type);
+void dp_enumerate_types(struct svec *types);
+
+int dp_enumerate_names(const char *type, struct svec *names);
+void dp_parse_name(const char *datapath_name, char **name, char **type);
+
+int dpif_open(const char *name, const char *type, struct dpif **);
+int dpif_create(const char *name, const char *type, struct dpif **);
+int dpif_create_and_open(const char *name, const char *type, struct dpif **);
 void dpif_close(struct dpif *);
 
 const char *dpif_name(const struct dpif *);
+const char *dpif_base_name(const struct dpif *);
 int dpif_get_all_names(const struct dpif *, struct svec *);
 
 int dpif_delete(struct dpif *);
@@ -81,8 +92,18 @@ int dpif_execute(struct dpif *, uint16_t in_port,
                  const union odp_action[], size_t n_actions,
                  const struct ofpbuf *);
 
+/* Minimum number of bytes of headroom for a packet returned by dpif_recv()
+ * member function.  This headroom allows "struct odp_msg" to be replaced by
+ * "struct ofp_packet_in" without copying the buffer. */
+#define DPIF_RECV_MSG_PADDING (sizeof(struct ofp_packet_in) \
+                               - sizeof(struct odp_msg))
+BUILD_ASSERT_DECL(sizeof(struct ofp_packet_in) > sizeof(struct odp_msg));
+BUILD_ASSERT_DECL(DPIF_RECV_MSG_PADDING % 4 == 0);
+
 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 ofpbuf **);
 int dpif_recv_purge(struct dpif *);
 void dpif_recv_wait(struct dpif *);
@@ -90,4 +111,11 @@ void dpif_recv_wait(struct dpif *);
 void dpif_get_netflow_ids(const struct dpif *,
                           uint8_t *engine_type, uint8_t *engine_id);
 
+int dpif_queue_to_priority(const struct dpif *, uint32_t queue_id,
+                           uint32_t *priority);
+
+#ifdef  __cplusplus
+}
+#endif
+
 #endif /* dpif.h */