dpif: Only clear 'all_dps' argument in dp_enumerate().

Originally, the function dp_enumerate() initialized the 'all_dps'
argument.  This is inconsistent with most other functions that take an
svec argument, which would only clear the contents.  Further, if someone
were not careful when reusing the svec, it could lead to memory leaks.
With this change, the caller is expected to first call svec_init() on
the argument.

diff --git a/lib/dpif.c b/lib/dpif.c
index 14b424e..e823fa3 100644 (file)
--- a/lib/dpif.c
+++ b/lib/dpif.c
@@ -95,9 +95,9 @@ dp_wait(void)
     }
 }
 
-/* Initializes 'all_dps' and enumerates the names of all known created
- * datapaths, where possible, into it.  Returns 0 if successful, otherwise a
- * positive errno value.
+/* Clears 'all_dps' and enumerates the names of all known created datapaths, 
+ * where possible, into it.  The caller must first initialize 'all_dps'.
+ * Returns 0 if successful, otherwise a positive errno value.
  *
  * Some kinds of datapaths might not be practically enumerable.  This is not
  * considered an error. */
@@ -107,7 +107,7 @@ dp_enumerate(struct svec *all_dps)
     int error;
     int i;
 
-    svec_init(all_dps);
+    svec_clear(all_dps);
     error = 0;
     for (i = 0; i < N_DPIF_CLASSES; i++) {
         const struct dpif_class *class = dpif_classes[i];

diff --git a/vswitchd/bridge.c b/vswitchd/bridge.c
index 6b05d13..22fe19a 100644 (file)
--- a/vswitchd/bridge.c
+++ b/vswitchd/bridge.c
@@ -285,6 +285,7 @@ bridge_init(void)
 
     unixctl_command_register("fdb/show", bridge_unixctl_fdb_show);
 
+    svec_init(&dpif_names);
     dp_enumerate(&dpif_names);
     for (i = 0; i < dpif_names.n; i++) {
         const char *dpif_name = dpif_names.names[i];