Catalli's threaded switch

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

diff --git a/lib/dpif.c b/lib/dpif.c
index 01e905d..28b936b 100644 (file)
--- a/lib/dpif.c
+++ b/lib/dpif.c
@@ -37,6 +37,7 @@
 #include "svec.h"
 #include "util.h"
 #include "valgrind.h"
+#include "fatal-signal.h"
 #include "vlog.h"
 
 VLOG_DEFINE_THIS_MODULE(dpif)
@@ -54,6 +55,7 @@ struct registered_dpif_class {
 };
 static struct shash dpif_classes = SHASH_INITIALIZER(&dpif_classes);
 
+
 /* Rate limit for individual messages going to or from the datapath, output at
  * DBG level.  This is very high because, if these are enabled, it is because
  * we really need to see them. */
@@ -78,14 +80,30 @@ dp_initialize(void)
 
     if (status < 0) {
         int i;
+#ifdef THREADED
+        struct shash_node *node;
+#endif
 
         status = 0;
         for (i = 0; i < ARRAY_SIZE(base_dpif_classes); i++) {
             dp_register_provider(base_dpif_classes[i]);
         }
+        
+#ifdef THREADED
+        /* register an exit handler for the registered classes */
+        SHASH_FOR_EACH(node, &dpif_classes) {
+            const struct registered_dpif_class *registered_class = node->data;
+            if (registered_class->dpif_class.exit_hook) {
+                fatal_signal_add_hook(registered_class->dpif_class.exit_hook,
+                        NULL, NULL, true);
+            }
+        }
+#endif
     }
 }
 
+
+
 /* Performs periodic work needed by all the various kinds of dpifs.
  *
  * If your program opens any dpifs, it must call both this function and
@@ -118,13 +136,34 @@ dp_wait(void)
     }
 }
 
+#ifdef THREADED
+/* Start the datapath management.
+ * 
+ * This function has been thought for a scenario in which the management of the
+ * datapath module and the ofproto module are performed in separate
+ * threads/processes module. */
+void
+dp_start(void)
+{
+    struct shash_node *node;
+
+    SHASH_FOR_EACH(node, &dpif_classes) {
+        const struct registered_dpif_class *registered_class = node->data;
+        if (registered_class->dpif_class.start) {
+            registered_class->dpif_class.start();
+        }
+    }
+}
+#endif
+
+
 /* Registers a new datapath provider.  After successful registration, new
  * datapaths of that type can be opened using dpif_open(). */
 int
 dp_register_provider(const struct dpif_class *new_class)
 {
     struct registered_dpif_class *registered_class;
-
+       
     if (shash_find(&dpif_classes, new_class->type)) {
         VLOG_WARN("attempted to register duplicate datapath provider: %s",
                   new_class->type);