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

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Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2008-04-16 01:22:02 -07:00 committed by David S. Miller
parent b0970c428b
commit 13eeb8e92c
1 changed files with 49 additions and 0 deletions
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49
net/ipv6/ip6_tunnel.c
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@ -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);