[IPV6] IP6TUNNEL: Delete all tunnel device when unloading module.

Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 17 insertions, 1 deletions

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 84d7ebdb9d21..c8d4160385f6 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1149,6 +1149,20 @@ fail:
         return err;
 }
 
+static void __exit ip6ip6_destroy_tunnels(void)
+{
+        int h;
+        struct ip6_tnl *t;
+
+        for (h = 0; h < HASH_SIZE; h++) {
+                while ((t = tnls_r_l[h]) != NULL)
+                        unregister_netdevice(t->dev);
+        }
+
+        t = tnls_wc[0];
+        unregister_netdevice(t->dev);
+}
+
 /**
  * ip6_tunnel_cleanup - free resources and unregister protocol
  **/
@@ -1158,7 +1172,9 @@ static void __exit ip6_tunnel_cleanup(void)
         if (xfrm6_tunnel_deregister(&ip6ip6_handler))
                 printk(KERN_INFO "ip6ip6 close: can't deregister tunnel\n");
 
-        unregister_netdev(ip6ip6_fb_tnl_dev);
+        rtnl_lock();
+        ip6ip6_destroy_tunnels();
+        rtnl_unlock();
 }
 
 module_init(ip6_tunnel_init);