route-table: Remove Unregister.

Since dpif registering for routing table at initialization
there is no need to unregister it. Following patch removes
support for turning routing table notifications on and off.
Due to this change OVS always listens for these
notifications.

Reported-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>

diff --git a/lib/dpif.c b/lib/dpif.c
index e39d7cd..49432f2 100644 (file)
--- a/lib/dpif.c
+++ b/lib/dpif.c
@@ -120,7 +120,7 @@ dp_initialize(void)
         dpctl_unixctl_register();
         tnl_port_map_init();
         tnl_arp_cache_init();
-        route_table_register();
+        route_table_init();
 
         for (i = 0; i < ARRAY_SIZE(base_dpif_classes); i++) {
             dp_register_provider(base_dpif_classes[i]);

diff --git a/lib/netdev-vport.c b/lib/netdev-vport.c
index 3825a09..e6b97fa 100644 (file)
--- a/lib/netdev-vport.c
+++ b/lib/netdev-vport.c
@@ -262,7 +262,6 @@ netdev_vport_destruct(struct netdev *netdev_)
 {
     struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 
-    route_table_unregister();
     free(netdev->peer);
     ovs_mutex_destroy(&netdev->mutex);
 }

diff --git a/lib/route-table-bsd.c b/lib/route-table-bsd.c
index 9793931..b28ab33 100644 (file)
--- a/lib/route-table-bsd.c
+++ b/lib/route-table-bsd.c
@@ -33,7 +33,6 @@
 #include "util.h"
 
 static int pid;
-static unsigned int register_count = 0;
 
 bool
 ovs_router_lookup(ovs_be32 ip, char name[], ovs_be32 *gw)
@@ -116,20 +115,9 @@ route_table_get_change_seq(void)
 }
 
 void
-route_table_register(void)
+route_table_init(void)
 {
-    if (!register_count)
-    {
-        pid = getpid();
-    }
-
-    register_count++;
-}
-
-void
-route_table_unregister(void)
-{
-    register_count--;
+    pid = getpid();
 }
 
 void

diff --git a/lib/route-table-stub.c b/lib/route-table-stub.c
index f91c6c7..afbd79d 100644 (file)
--- a/lib/route-table-stub.c
+++ b/lib/route-table-stub.c
@@ -38,12 +38,7 @@ route_table_get_change_seq(void)
 }
 
 void
-route_table_register(void)
-{
-}
-
-void
-route_table_unregister(void)
+route_table_init(void)
 {
 }
 

diff --git a/lib/route-table.c b/lib/route-table.c
index 63a9bd3..a1bc887 100644 (file)
--- a/lib/route-table.c
+++ b/lib/route-table.c
@@ -61,7 +61,6 @@ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
  * every time route_table_reset() is called.  */
 static uint64_t rt_change_seq;
 
-static unsigned int register_count = 0;
 static struct nln *nln = NULL;
 static struct route_table_msg rtmsg;
 static struct nln_notifier *route_notifier = NULL;
@@ -76,7 +75,6 @@ static void route_table_change(const struct route_table_msg *, void *);
 static void route_map_clear(void);
 
 static void name_table_init(void);
-static void name_table_uninit(void);
 static void name_table_change(const struct rtnetlink_link_change *, void *);
 
 uint64_t
@@ -88,49 +86,24 @@ route_table_get_change_seq(void)
 /* Users of the route_table module should register themselves with this
  * function before making any other route_table function calls. */
 void
-route_table_register(void)
+route_table_init(void)
     OVS_EXCLUDED(route_table_mutex)
 {
     ovs_mutex_lock(&route_table_mutex);
-    if (!register_count) {
-        ovs_assert(!nln);
-        ovs_assert(!route_notifier);
+    ovs_assert(!nln);
+    ovs_assert(!route_notifier);
 
-        ovs_router_init();
-        nln = nln_create(NETLINK_ROUTE, RTNLGRP_IPV4_ROUTE,
-                         (nln_parse_func *) route_table_parse, &rtmsg);
+    ovs_router_init();
+    nln = nln_create(NETLINK_ROUTE, RTNLGRP_IPV4_ROUTE,
+                     (nln_parse_func *) route_table_parse, &rtmsg);
 
-        route_notifier =
-            nln_notifier_create(nln, (nln_notify_func *) route_table_change,
-                                NULL);
+    route_notifier =
+        nln_notifier_create(nln, (nln_notify_func *) route_table_change,
+                            NULL);
 
-        route_table_reset();
-        name_table_init();
-    }
-
-    register_count++;
-    ovs_mutex_unlock(&route_table_mutex);
-}
-
-/* Users of the route_table module should unregister themselves with this
- * function when they will no longer be making any more route_table fuction
- * calls. */
-void
-route_table_unregister(void)
-    OVS_EXCLUDED(route_table_mutex)
-{
-    ovs_mutex_lock(&route_table_mutex);
-    register_count--;
+    route_table_reset();
+    name_table_init();
 
-    if (!register_count) {
-        nln_notifier_destroy(route_notifier);
-        route_notifier = NULL;
-        nln_destroy(nln);
-        nln = NULL;
-
-        route_map_clear();
-        name_table_uninit();
-    }
     ovs_mutex_unlock(&route_table_mutex);
 }
 
@@ -300,12 +273,6 @@ name_table_init(void)
     name_notifier = rtnetlink_link_notifier_create(name_table_change, NULL);
 }
 
-static void
-name_table_uninit(void)
-{
-    rtnetlink_link_notifier_destroy(name_notifier);
-    name_notifier = NULL;
-}
 
 static void
 name_table_change(const struct rtnetlink_link_change *change OVS_UNUSED,

diff --git a/lib/route-table.h b/lib/route-table.h
index 709dfb0..5dac29e 100644 (file)
--- a/lib/route-table.h
+++ b/lib/route-table.h
@@ -26,8 +26,7 @@
 #include "openvswitch/types.h"
 
 uint64_t route_table_get_change_seq(void);
-void route_table_register(void);
-void route_table_unregister(void);
+void route_table_init(void);
 void route_table_run(void);
 void route_table_wait(void);
 

diff --git a/ofproto/ofproto-dpif-sflow.c b/ofproto/ofproto-dpif-sflow.c
index 60b65a3..35667ca 100644 (file)
--- a/ofproto/ofproto-dpif-sflow.c
+++ b/ofproto/ofproto-dpif-sflow.c
@@ -390,7 +390,6 @@ dpif_sflow_create(void)
     ds->next_tick = time_now() + 1;
     hmap_init(&ds->ports);
     ds->probability = 0;
-    route_table_register();
     ovs_refcount_init(&ds->ref_cnt);
 
     return ds;
@@ -425,7 +424,6 @@ dpif_sflow_unref(struct dpif_sflow *ds) OVS_EXCLUDED(mutex)
     if (ds && ovs_refcount_unref_relaxed(&ds->ref_cnt) == 1) {
         struct dpif_sflow_port *dsp, *next;
 
-        route_table_unregister();
         dpif_sflow_clear(ds);
         HMAP_FOR_EACH_SAFE (dsp, next, hmap_node, &ds->ports) {
             dpif_sflow_del_port__(ds, dsp);