Commit b9855c54 authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by David S. Miller

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

Create on in ipip_init_net(), use it all over the code (the
proper place to get the net from already exists) and destroy
in ipip_net_exit().
Signed-off-by: default avatarPavel Emelyanov <xemul@openvz.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 10dc4c7b
......@@ -123,14 +123,13 @@
static int ipip_net_id;
struct ipip_net {
struct net_device *fb_tunnel_dev;
};
static int ipip_fb_tunnel_init(struct net_device *dev);
static int ipip_tunnel_init(struct net_device *dev);
static void ipip_tunnel_setup(struct net_device *dev);
static struct net_device *ipip_fb_tunnel_dev;
static struct ip_tunnel *tunnels_r_l[HASH_SIZE];
static struct ip_tunnel *tunnels_r[HASH_SIZE];
static struct ip_tunnel *tunnels_l[HASH_SIZE];
......@@ -257,7 +256,10 @@ static struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int c
static void ipip_tunnel_uninit(struct net_device *dev)
{
if (dev == ipip_fb_tunnel_dev) {
struct net *net = dev_net(dev);
struct ipip_net *ipn = net_generic(net, ipip_net_id);
if (dev == ipn->fb_tunnel_dev) {
write_lock_bh(&ipip_lock);
tunnels_wc[0] = NULL;
write_unlock_bh(&ipip_lock);
......@@ -693,11 +695,13 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
int err = 0;
struct ip_tunnel_parm p;
struct ip_tunnel *t;
struct net *net = dev_net(dev);
struct ipip_net *ipn = net_generic(net, ipip_net_id);
switch (cmd) {
case SIOCGETTUNNEL:
t = NULL;
if (dev == ipip_fb_tunnel_dev) {
if (dev == ipn->fb_tunnel_dev) {
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
err = -EFAULT;
break;
......@@ -730,7 +734,7 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
t = ipip_tunnel_locate(&p, cmd == SIOCADDTUNNEL);
if (dev != ipip_fb_tunnel_dev && cmd == SIOCCHGTUNNEL) {
if (dev != ipn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) {
if (t != NULL) {
if (t->dev != dev) {
err = -EEXIST;
......@@ -776,7 +780,7 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
if (!capable(CAP_NET_ADMIN))
goto done;
if (dev == ipip_fb_tunnel_dev) {
if (dev == ipn->fb_tunnel_dev) {
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
goto done;
......@@ -784,7 +788,7 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
if ((t = ipip_tunnel_locate(&p, 0)) == NULL)
goto done;
err = -EPERM;
if (t->dev == ipip_fb_tunnel_dev)
if (t->dev == ipn->fb_tunnel_dev)
goto done;
dev = t->dev;
}
......@@ -847,7 +851,7 @@ static int ipip_tunnel_init(struct net_device *dev)
return 0;
}
static int __init ipip_fb_tunnel_init(struct net_device *dev)
static int ipip_fb_tunnel_init(struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
struct iphdr *iph = &tunnel->parms.iph;
......@@ -887,8 +891,26 @@ static int ipip_init_net(struct net *net)
if (err < 0)
goto err_assign;
ipn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel),
"tunl0",
ipip_tunnel_setup);
if (!ipn->fb_tunnel_dev) {
err = -ENOMEM;
goto err_alloc_dev;
}
ipn->fb_tunnel_dev->init = ipip_fb_tunnel_init;
dev_net_set(ipn->fb_tunnel_dev, net);
if ((err = register_netdev(ipn->fb_tunnel_dev)))
goto err_reg_dev;
return 0;
err_reg_dev:
free_netdev(ipn->fb_tunnel_dev);
err_alloc_dev:
/* nothing */
err_assign:
kfree(ipn);
err_alloc:
......@@ -900,6 +922,9 @@ static void ipip_exit_net(struct net *net)
struct ipip_net *ipn;
ipn = net_generic(net, ipip_net_id);
rtnl_lock();
unregister_netdevice(ipn->fb_tunnel_dev);
rtnl_unlock();
kfree(ipn);
}
......@@ -919,32 +944,11 @@ static int __init ipip_init(void)
return -EAGAIN;
}
ipip_fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel),
"tunl0",
ipip_tunnel_setup);
if (!ipip_fb_tunnel_dev) {
err = -ENOMEM;
goto err1;
}
ipip_fb_tunnel_dev->init = ipip_fb_tunnel_init;
if ((err = register_netdev(ipip_fb_tunnel_dev)))
goto err2;
err = register_pernet_gen_device(&ipip_net_id, &ipip_net_ops);
if (err)
goto err3;
out:
return err;
err2:
free_netdev(ipip_fb_tunnel_dev);
err1:
xfrm4_tunnel_deregister(&ipip_handler, AF_INET);
goto out;
err3:
unregister_netdevice(ipip_fb_tunnel_dev);
goto err1;
return err;
}
static void __exit ipip_destroy_tunnels(void)
......@@ -968,7 +972,6 @@ static void __exit ipip_fini(void)
rtnl_lock();
ipip_destroy_tunnels();
unregister_netdevice(ipip_fb_tunnel_dev);
rtnl_unlock();
unregister_pernet_gen_device(ipip_net_id, &ipip_net_ops);
......
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