tests: Rewrite unit tests to not expect bridge with odp zero.

A future commit will make all bridges of a particular type share a
single backing datapath.  That backing datapath will have a datapath
port number of zero and bridges will be assigned other numbers.  This
commit modifies the tests so that they don't expect port zero.

It adopts the convention that bridges of type "dummy" with a name of the
form "br<n>" will be assigned a port number of 100+<n>.

Signed-off-by: Justin Pettit <jpettit@nicira.com>

1 files changed, 44 insertions, 35 deletions

diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index 08f3abf5..7f91f48b 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -198,10 +198,50 @@ create_dpif_netdev(struct dp_netdev *dp)
 }
 
 static int
+choose_port(struct dp_netdev *dp, const char *name)
+{
+    int port_no;
+
+    if (dp->class != &dpif_netdev_class) {
+        const char *p;
+        int start_no = 0;
+
+        /* If the port name begins with "br", start the number search at
+         * 100 to make writing tests easier. */
+        if (!strncmp(name, "br", 2)) {
+            start_no = 100;
+        }
+
+        /* If the port name contains a number, try to assign that port number.
+         * This can make writing unit tests easier because port numbers are
+         * predictable. */
+        for (p = name; *p != '\0'; p++) {
+            if (isdigit((unsigned char) *p)) {
+                port_no = start_no + strtol(p, NULL, 10);
+                if (port_no > 0 && port_no < MAX_PORTS
+                    && !dp->ports[port_no]) {
+                    return port_no;
+                }
+                break;
+            }
+        }
+    }
+
+    for (port_no = 1; port_no < MAX_PORTS; port_no++) {
+        if (!dp->ports[port_no]) {
+            return port_no;
+        }
+    }
+
+    return -1;
+}
+
+static int
 create_dp_netdev(const char *name, const struct dpif_class *class,
                  struct dp_netdev **dpp)
 {
     struct dp_netdev *dp;
+    int port_no;
     int error;
     int i;
 
@@ -214,7 +254,9 @@ create_dp_netdev(const char *name, const struct dpif_class *class,
     }
     hmap_init(&dp->flow_table);
     list_init(&dp->port_list);
-    error = do_add_port(dp, name, "internal", OVSP_LOCAL);
+
+    port_no = !strncmp(name, "br", 2) ? choose_port(dp, name) : OVSP_LOCAL;
+    error = do_add_port(dp, name, "internal", port_no);
     if (error) {
         dp_netdev_free(dp);
         return error;
@@ -371,39 +413,6 @@ do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
 }
 
 static int
-choose_port(struct dpif *dpif, struct netdev *netdev)
-{
-    struct dp_netdev *dp = get_dp_netdev(dpif);
-    int port_no;
-
-    if (dpif->dpif_class != &dpif_netdev_class) {
-        /* If the port name contains a number, try to assign that port number.
-         * This can make writing unit tests easier because port numbers are
-         * predictable. */
-        const char *p;
-
-        for (p = netdev_get_name(netdev); *p != '\0'; p++) {
-            if (isdigit((unsigned char) *p)) {
-                port_no = strtol(p, NULL, 10);
-                if (port_no > 0 && port_no < MAX_PORTS
-                    && !dp->ports[port_no]) {
-                    return port_no;
-                }
-                break;
-            }
-        }
-    }
-
-    for (port_no = 0; port_no < MAX_PORTS; port_no++) {
-        if (!dp->ports[port_no]) {
-            return port_no;
-        }
-    }
-
-    return -1;
-}
-
-static int
 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
                      uint32_t *port_nop)
 {
@@ -418,7 +427,7 @@ dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
         }
         port_no = *port_nop;
     } else {
-        port_no = choose_port(dpif, netdev);
+        port_no = choose_port(dp, netdev_get_name(netdev));
     }
     if (port_no >= 0) {
         *port_nop = port_no;