ofproto: Querying port stats for individual ports (OpenFlow 1.0)

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

diff --git a/lib/dpif-provider.h b/lib/dpif-provider.h
index 35f6c74..1d41eaf 100644 (file)
--- a/lib/dpif-provider.h
+++ b/lib/dpif-provider.h
@@ -23,11 +23,15 @@
 #include <assert.h>
 #include "dpif.h"
 
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
 /* Open vSwitch datapath interface.
  *
  * This structure should be treated as opaque by dpif implementations. */
 struct dpif {
-    const struct dpif_class *class;
+    const struct dpif_class *dpif_class;
     char *name;
     uint8_t netflow_engine_type;
     uint8_t netflow_engine_id;
@@ -36,13 +40,13 @@ struct dpif {
 void dpif_init(struct dpif *, const struct dpif_class *, const char *name,
                uint8_t netflow_engine_type, uint8_t netflow_engine_id);
 static inline void dpif_assert_class(const struct dpif *dpif,
-                                     const struct dpif_class *class)
+                                     const struct dpif_class *dpif_class)
 {
-    assert(dpif->class == class);
+    assert(dpif->dpif_class == dpif_class);
 }
 
 /* Datapath interface class structure, to be defined by each implementation of
- * a datapath interface
+ * a datapath interface.
  *
  * These functions return 0 if successful or a positive errno value on failure,
  * except where otherwise noted.
@@ -52,7 +56,7 @@ static inline void dpif_assert_class(const struct dpif *dpif,
  * EWOULDBLOCK or EINPROGRESS.  We may relax this requirement in the future if
  * and when we encounter performance problems. */
 struct dpif_class {
-    /* Prefix for names of dpifs in this class, e.g. "udatapath:".
+    /* Prefix for names of dpifs in this class, e.g. "netdev:".
      *
      * One dpif class may have the empty string "" as its prefix, in which case
      * that dpif class is associated with dpif names that don't match any other
@@ -70,6 +74,17 @@ struct dpif_class {
      * to be called. */
     void (*wait)(void);
 
+    /* Enumerates the names of all known created datapaths, if possible, into
+     * 'all_dps'.  The caller has already initialized 'all_dps' and other dpif
+     * classes might already have added names to it.
+     *
+     * This is used by the vswitch at startup, so that it can delete any
+     * datapaths that are not configured.
+     *
+     * Some kinds of datapaths might not be practically enumerable, in which
+     * case this function may be a null pointer. */
+    int (*enumerate)(struct svec *all_dps);
+
     /* Attempts to open an existing dpif, if 'create' is false, or to open an
      * existing dpif or create a new one, if 'create' is true.  'name' is the
      * full dpif name provided by the user, e.g. "udatapath:/var/run/mypath".
@@ -85,11 +100,28 @@ struct dpif_class {
     /* Closes 'dpif' and frees associated memory. */
     void (*close)(struct dpif *dpif);
 
+    /* Enumerates all names that may be used to open 'dpif' into 'all_names'.
+     * The Linux datapath, for example, supports opening a datapath both by
+     * number, e.g. "dp0", and by the name of the datapath's local port.  For
+     * some datapaths, this might be an infinite set (e.g. in a file name,
+     * slashes may be duplicated any number of times), in which case only the
+     * names most likely to be used should be enumerated.
+     *
+     * The caller has already initialized 'all_names' and might already have
+     * added some names to it.  This function should not disturb any existing
+     * names in 'all_names'.
+     *
+     * If a datapath class does not support multiple names for a datapath, this
+     * function may be a null pointer.
+     *
+     * This is used by the vswitch at startup, */
+    int (*get_all_names)(const struct dpif *dpif, struct svec *all_names);
+
     /* Attempts to destroy the dpif underlying 'dpif'.
      *
      * If successful, 'dpif' will not be used again except as an argument for
      * the 'close' member function. */
-    int (*delete)(struct dpif *dpif);
+    int (*destroy)(struct dpif *dpif);
 
     /* Retrieves statistics for 'dpif' into 'stats'. */
     int (*get_stats)(const struct dpif *dpif, struct odp_stats *stats);
@@ -265,5 +297,10 @@ struct dpif_class {
 };
 
 extern const struct dpif_class dpif_linux_class;
+extern const struct dpif_class dpif_netdev_class;
+
+#ifdef  __cplusplus
+}
+#endif
 
 #endif /* dpif-provider.h */