[IP6TUNNEL]: Introduce empty ip6_tnl_net structure and net ops.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 49 insertions, 0 deletions

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 61517fe0c57c..2365eb0fb6a4 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -52,6 +52,8 @@
 #include <net/xfrm.h>
 #include <net/dsfield.h>
 #include <net/inet_ecn.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
 
 MODULE_AUTHOR("Ville Nuorvala");
 MODULE_DESCRIPTION("IPv6 tunneling device");
@@ -78,6 +80,10 @@ static int ip6_fb_tnl_dev_init(struct net_device *dev);
 static int ip6_tnl_dev_init(struct net_device *dev);
 static void ip6_tnl_dev_setup(struct net_device *dev);
 
+static int ip6_tnl_net_id;
+struct ip6_tnl_net {
+};
+
 /* the IPv6 tunnel fallback device */
 static struct net_device *ip6_fb_tnl_dev;
 
@@ -1384,6 +1390,41 @@ static struct xfrm6_tunnel ip6ip6_handler = {
         .priority       =       1,
 };
 
+static int ip6_tnl_init_net(struct net *net)
+{
+        int err;
+        struct ip6_tnl_net *ip6n;
+
+        err = -ENOMEM;
+        ip6n = kmalloc(sizeof(struct ip6_tnl_net), GFP_KERNEL);
+        if (ip6n == NULL)
+                goto err_alloc;
+
+        err = net_assign_generic(net, ip6_tnl_net_id, ip6n);
+        if (err < 0)
+                goto err_assign;
+
+        return 0;
+
+err_assign:
+        kfree(ip6n);
+err_alloc:
+        return err;
+}
+
+static void ip6_tnl_exit_net(struct net *net)
+{
+        struct ip6_tnl_net *ip6n;
+
+        ip6n = net_generic(net, ip6_tnl_net_id);
+        kfree(ip6n);
+}
+
+static struct pernet_operations ip6_tnl_net_ops = {
+        .init = ip6_tnl_init_net,
+        .exit = ip6_tnl_exit_net,
+};
+
 /**
  * ip6_tunnel_init - register protocol and reserve needed resources
  *
@@ -1418,7 +1459,13 @@ static int __init ip6_tunnel_init(void)
                 free_netdev(ip6_fb_tnl_dev);
                 goto fail;
         }
+
+        err = register_pernet_gen_device(&ip6_tnl_net_id, &ip6_tnl_net_ops);
+        if (err < 0)
+                goto err_pernet;
         return 0;
+err_pernet:
+        unregister_netdevice(ip6_fb_tnl_dev);
 fail:
         xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6);
 unreg_ip4ip6:
@@ -1456,6 +1503,8 @@ static void __exit ip6_tunnel_cleanup(void)
         rtnl_lock();
         ip6_tnl_destroy_tunnels();
         rtnl_unlock();
+
+        unregister_pernet_gen_device(ip6_tnl_net_id, &ip6_tnl_net_ops);
 }
 
 module_init(ip6_tunnel_init);