netns: make rt_secret_rebuild timer per namespace

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 32 insertions, 10 deletions

diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index a29adf1ba0ff..356617f81beb 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -46,5 +46,7 @@ struct netns_ipv4 {
         int sysctl_icmp_ratelimit;
         int sysctl_icmp_ratemask;
         int sysctl_icmp_errors_use_inbound_ifaddr;
+
+        struct timer_list rt_secret_timer;
 };
 #endif
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 6fe799de9b96..f99d9dbb7720 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -132,7 +132,6 @@ static int ip_rt_secret_interval __read_mostly	= 10 * 60 * HZ;
 
 static void rt_worker_func(struct work_struct *work);
 static DECLARE_DELAYED_WORK(expires_work, rt_worker_func);
-static struct timer_list rt_secret_timer;
 
 /*
  *      Interface to generic destination cache.
@@ -801,10 +800,11 @@ void rt_cache_flush(struct net *net, int delay)
 /*
  * We change rt_genid and let gc do the cleanup
  */
-static void rt_secret_rebuild(unsigned long dummy)
+static void rt_secret_rebuild(unsigned long __net)
 {
+        struct net *net = (struct net *)__net;
         rt_cache_invalidate();
-        mod_timer(&rt_secret_timer, jiffies + ip_rt_secret_interval);
+        mod_timer(&net->ipv4.rt_secret_timer, jiffies + ip_rt_secret_interval);
 }
 
 /*
@@ -3072,6 +3072,31 @@ static __net_initdata struct pernet_operations sysctl_route_ops = {
 };
 #endif
 
+
+static __net_init int rt_secret_timer_init(struct net *net)
+{
+        net->ipv4.rt_secret_timer.function = rt_secret_rebuild;
+        net->ipv4.rt_secret_timer.data = (unsigned long)net;
+        init_timer_deferrable(&net->ipv4.rt_secret_timer);
+
+        net->ipv4.rt_secret_timer.expires =
+                jiffies + net_random() % ip_rt_secret_interval +
+                ip_rt_secret_interval;
+        add_timer(&net->ipv4.rt_secret_timer);
+        return 0;
+}
+
+static __net_exit void rt_secret_timer_exit(struct net *net)
+{
+        del_timer_sync(&net->ipv4.rt_secret_timer);
+}
+
+static __net_initdata struct pernet_operations rt_secret_timer_ops = {
+        .init = rt_secret_timer_init,
+        .exit = rt_secret_timer_exit,
+};
+
+
 #ifdef CONFIG_NET_CLS_ROUTE
 struct ip_rt_acct *ip_rt_acct __read_mostly;
 #endif /* CONFIG_NET_CLS_ROUTE */
@@ -3124,19 +3149,14 @@ int __init ip_rt_init(void)
         devinet_init();
         ip_fib_init();
 
-        rt_secret_timer.function = rt_secret_rebuild;
-        rt_secret_timer.data = 0;
-        init_timer_deferrable(&rt_secret_timer);
-
         /* All the timers, started at system startup tend
            to synchronize. Perturb it a bit.
          */
         schedule_delayed_work(&expires_work,
                 net_random() % ip_rt_gc_interval + ip_rt_gc_interval);
 
-        rt_secret_timer.expires = jiffies + net_random() % ip_rt_secret_interval +
-                ip_rt_secret_interval;
-        add_timer(&rt_secret_timer);
+        if (register_pernet_subsys(&rt_secret_timer_ops))
+                printk(KERN_ERR "Unable to setup rt_secret_timer\n");
 
         if (ip_rt_proc_init())
                 printk(KERN_ERR "Unable to create route proc files\n");