[IP6TUNNEL]: Make the fallback tunnel device per-net.

All the code, that reference it already has the ip6_tnl_net pointer,
so s/ip6_fb_tnl_dev/ip6n->fb_tnl_dev/ and move creation/releasing
code into net init/exit ops.

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

1 files changed, 24 insertions, 24 deletions

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 72485a3ac9f..511a6c41688 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -82,12 +82,10 @@ 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 */
+        struct net_device *fb_tnl_dev;
 };
 
-/* the IPv6 tunnel fallback device */
-static struct net_device *ip6_fb_tnl_dev;
-
-
 /* lists for storing tunnels in use */
 static struct ip6_tnl *tnls_r_l[HASH_SIZE];
 static struct ip6_tnl *tnls_wc[1];
@@ -314,7 +312,7 @@ ip6_tnl_dev_uninit(struct net_device *dev)
         struct net *net = dev_net(dev);
         struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
 
-        if (dev == ip6_fb_tnl_dev) {
+        if (dev == ip6n->fb_tnl_dev) {
                 write_lock_bh(&ip6_tnl_lock);
                 tnls_wc[0] = NULL;
                 write_unlock_bh(&ip6_tnl_lock);
@@ -1209,7 +1207,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 
         switch (cmd) {
         case SIOCGETTUNNEL:
-                if (dev == ip6_fb_tnl_dev) {
+                if (dev == ip6n->fb_tnl_dev) {
                         if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) {
                                 err = -EFAULT;
                                 break;
@@ -1236,7 +1234,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
                     p.proto != 0)
                         break;
                 t = ip6_tnl_locate(net, &p, cmd == SIOCADDTUNNEL);
-                if (dev != ip6_fb_tnl_dev && cmd == SIOCCHGTUNNEL) {
+                if (dev != ip6n->fb_tnl_dev && cmd == SIOCCHGTUNNEL) {
                         if (t != NULL) {
                                 if (t->dev != dev) {
                                         err = -EEXIST;
@@ -1263,7 +1261,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
                 if (!capable(CAP_NET_ADMIN))
                         break;
 
-                if (dev == ip6_fb_tnl_dev) {
+                if (dev == ip6n->fb_tnl_dev) {
                         err = -EFAULT;
                         if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p)))
                                 break;
@@ -1271,7 +1269,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
                         if ((t = ip6_tnl_locate(net, &p, 0)) == NULL)
                                 break;
                         err = -EPERM;
-                        if (t->dev == ip6_fb_tnl_dev)
+                        if (t->dev == ip6n->fb_tnl_dev)
                                 break;
                         dev = t->dev;
                 }
@@ -1413,8 +1411,25 @@ static int ip6_tnl_init_net(struct net *net)
         if (err < 0)
                 goto err_assign;
 
+        err = -ENOMEM;
+        ip6n->fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0",
+                                      ip6_tnl_dev_setup);
+
+        if (!ip6n->fb_tnl_dev)
+                goto err_alloc_dev;
+
+        ip6n->fb_tnl_dev->init = ip6_fb_tnl_dev_init;
+        dev_net_set(ip6n->fb_tnl_dev, net);
+
+        err = register_netdev(ip6n->fb_tnl_dev);
+        if (err < 0)
+                goto err_register;
         return 0;
 
+err_register:
+        free_netdev(ip6n->fb_tnl_dev);
+err_alloc_dev:
+        /* nothing */
 err_assign:
         kfree(ip6n);
 err_alloc:
@@ -1455,27 +1470,12 @@ static int __init ip6_tunnel_init(void)
                 err = -EAGAIN;
                 goto unreg_ip4ip6;
         }
-        ip6_fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0",
-                                      ip6_tnl_dev_setup);
-
-        if (!ip6_fb_tnl_dev) {
-                err = -ENOMEM;
-                goto fail;
-        }
-        ip6_fb_tnl_dev->init = ip6_fb_tnl_dev_init;
-
-        if ((err = register_netdev(ip6_fb_tnl_dev))) {
-                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:
         xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET);