X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fdpif.c;h=793eaa1189a9533ce7f469a8d720107165660af2;hb=0b0544d706d10516d3122fbcce8f1dc1dec6cb92;hp=649c2464c8aae38a11a3f0e7f23ab10640ad448f;hpb=39fb08818bbd9c438dbf23caa89937c663451b5a;p=sliver-openvswitch.git

diff --git a/lib/dpif.c b/lib/dpif.c
index 649c2464c..793eaa118 100644
--- a/lib/dpif.c
+++ b/lib/dpif.c
@@ -169,13 +169,35 @@ dpif_open(const char *name, struct dpif **dpifp)
 /* Tries to create and open a new datapath with the given 'name'.  Will fail if
  * a datapath named 'name' already exists.  Returns 0 if successful, otherwise
  * a positive errno value.  On success stores a pointer to the datapath in
- * '*dpifp', otherwise a null pointer.*/
+ * '*dpifp', otherwise a null pointer. */
 int
 dpif_create(const char *name, struct dpif **dpifp)
 {
     return do_open(name, true, dpifp);
 }
 
+/* Tries to open a datapath with the given 'name', creating it if it does not
+ * exist.  Returns 0 if successful, otherwise a positive errno value.  On
+ * success stores a pointer to the datapath in '*dpifp', otherwise a null
+ * pointer. */
+int
+dpif_create_and_open(const char *name, struct dpif **dpifp)
+{
+    int error;
+
+    error = dpif_create(name, dpifp);
+    if (error == EEXIST || error == EBUSY) {
+        error = dpif_open(name, dpifp);
+        if (error) {
+            VLOG_WARN("datapath %s already exists but cannot be opened: %s",
+                      name, strerror(error));
+        }
+    } else if (error) {
+        VLOG_WARN("failed to create datapath %s: %s", name, strerror(error));
+    }
+    return error;
+}
+
 /* Closes and frees the connection to 'dpif'.  Does not destroy the datapath
  * itself; call dpif_delete() first, instead, if that is desirable. */
 void