Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[linux-2.6-omap-h63xx.git] / net / ipv6 / addrconf.c

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index f8f76d6e21cbe3d212a6d6d830ce3a9cc46c1c03..e83852ab4dc8fb2d6a7eb3644b3fabc3e9f9d14a 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -493,15 +493,17 @@ static void addrconf_forward_change(struct net *net, __s32 newf)
        read_unlock(&dev_base_lock);
 }
 
-static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
+static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
 {
        struct net *net;
 
        net = (struct net *)table->extra2;
        if (p == &net->ipv6.devconf_dflt->forwarding)
-               return;
+               return 0;
+
+       if (!rtnl_trylock())
+               return -ERESTARTSYS;
 
-       rtnl_lock();
        if (p == &net->ipv6.devconf_all->forwarding) {
                __s32 newf = net->ipv6.devconf_all->forwarding;
                net->ipv6.devconf_dflt->forwarding = newf;
@@ -512,6 +514,7 @@ static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
 
        if (*p)
                rt6_purge_dflt_routers(net);
+       return 1;
 }
 #endif
 
@@ -2599,9 +2602,6 @@ static int addrconf_ifdown(struct net_device *dev, int how)
 
        ASSERT_RTNL();
 
-       if ((dev->flags & IFF_LOOPBACK) && how == 1)
-               how = 0;
-
        rt6_ifdown(net, dev);
        neigh_ifdown(&nd_tbl, dev);
 
@@ -3977,7 +3977,7 @@ int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
        ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
 
        if (write)
-               addrconf_fixup_forwarding(ctl, valp, val);
+               ret = addrconf_fixup_forwarding(ctl, valp, val);
        return ret;
 }
 
@@ -4013,8 +4013,7 @@ static int addrconf_sysctl_forward_strategy(ctl_table *table,
        }
 
        *valp = new;
-       addrconf_fixup_forwarding(table, valp, val);
-       return 1;
+       return addrconf_fixup_forwarding(table, valp, val);
 }
 
 static struct addrconf_sysctl_table
@@ -4440,25 +4439,6 @@ int unregister_inet6addr_notifier(struct notifier_block *nb)
 
 EXPORT_SYMBOL(unregister_inet6addr_notifier);
 
-static void addrconf_net_exit(struct net *net)
-{
-       struct net_device *dev;
-
-       rtnl_lock();
-       /* clean dev list */
-       for_each_netdev(net, dev) {
-               if (__in6_dev_get(dev) == NULL)
-                       continue;
-               addrconf_ifdown(dev, 1);
-       }
-       addrconf_ifdown(net->loopback_dev, 2);
-       rtnl_unlock();
-}
-
-static struct pernet_operations addrconf_net_ops = {
-       .exit = addrconf_net_exit,
-};
-
 /*
  *     Init / cleanup code
  */
@@ -4500,10 +4480,6 @@ int __init addrconf_init(void)
        if (err)
                goto errlo;
 
-       err = register_pernet_device(&addrconf_net_ops);
-       if (err)
-               return err;
-
        register_netdevice_notifier(&ipv6_dev_notf);
 
        addrconf_verify(0);
@@ -4533,15 +4509,22 @@ errlo:
 void addrconf_cleanup(void)
 {
        struct inet6_ifaddr *ifa;
+       struct net_device *dev;
        int i;
 
        unregister_netdevice_notifier(&ipv6_dev_notf);
-       unregister_pernet_device(&addrconf_net_ops);
-
        unregister_pernet_subsys(&addrconf_ops);
 
        rtnl_lock();
 
+       /* clean dev list */
+       for_each_netdev(&init_net, dev) {
+               if (__in6_dev_get(dev) == NULL)
+                       continue;
+               addrconf_ifdown(dev, 1);
+       }
+       addrconf_ifdown(init_net.loopback_dev, 2);
+
        /*
         *      Check hash table.
         */
@@ -4562,6 +4545,4 @@ void addrconf_cleanup(void)
 
        del_timer(&addr_chk_timer);
        rtnl_unlock();
-
-       unregister_pernet_subsys(&addrconf_net_ops);
 }