static void ipip_tunnel_uninit(struct net_device *dev)
{
if (dev == ipip_fb_tunnel_dev) {
write_lock_bh(&ipip_lock);
tunnels_wc[0] = NULL;
write_unlock_bh(&ipip_lock);
} else
ipip_tunnel_unlink((struct ip_tunnel*)dev->priv);
dev_put(dev);
}
static void ipip_tunnel_destroy(struct device *dev)
{
if (dev == &ipip_fb_tunnel_dev) {
tunnels_wc[0] = NULL;
synchronize_bh();
} else {
ipip_tunnel_unlink((struct ip_tunnel*)dev->priv);
kfree(dev);
MOD_DEC_USE_COUNT;
}
}
static void ipip_tunnel_uninit(struct net_device *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);
ipn->tunnels_wc[0] = NULL;
write_unlock_bh(&ipip_lock);
} else
ipip_tunnel_unlink(ipn, netdev_priv(dev));
dev_put(dev);
}
static int
ipip_tunnel_ioctl (struct device *dev, struct ifreq *ifr, int cmd)
{
int err = 0;
struct ip_tunnel_parm p;
struct ip_tunnel *t;
MOD_INC_USE_COUNT;
switch (cmd) {
case SIOCGETTUNNEL:
t = NULL;
if (dev == &ipip_fb_tunnel_dev) {
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
err = -EFAULT;
break;
}
t = ipip_tunnel_locate(&p, 0);
}
if (t == NULL)
t = (struct ip_tunnel*)dev->priv;
memcpy(&p, &t->parms, sizeof(p));
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
err = -EFAULT;
break;
case SIOCADDTUNNEL:
case SIOCCHGTUNNEL:
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
goto done;
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
goto done;
err = -EINVAL;
if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP ||
p.iph.ihl != 5 || (p.iph.frag_off&__constant_htons(~IP_DF)))
goto done;
if (p.iph.ttl)
p.iph.frag_off |= __constant_htons(IP_DF);
t = ipip_tunnel_locate(&p, cmd == SIOCADDTUNNEL);
if (dev != &ipip_fb_tunnel_dev && cmd == SIOCCHGTUNNEL &&
t != &ipip_fb_tunnel) {
if (t != NULL) {
if (t->dev != dev) {
err = -EEXIST;
break;
}
} else {
if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) ||
(!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) {
err = -EINVAL;
break;
}
t = (struct ip_tunnel*)dev->priv;
start_bh_atomic();
ipip_tunnel_unlink(t);
t->parms.iph.saddr = p.iph.saddr;
t->parms.iph.daddr = p.iph.daddr;
memcpy(dev->dev_addr, &p.iph.saddr, 4);
memcpy(dev->broadcast, &p.iph.daddr, 4);
ipip_tunnel_link(t);
end_bh_atomic();
netdev_state_change(dev);
}
}
if (t) {
err = 0;
if (cmd == SIOCCHGTUNNEL) {
t->parms.iph.ttl = p.iph.ttl;
t->parms.iph.tos = p.iph.tos;
t->parms.iph.frag_off = p.iph.frag_off;
}
if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p)))
err = -EFAULT;
} else
err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT);
break;
case SIOCDELTUNNEL:
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
goto done;
if (dev == &ipip_fb_tunnel_dev) {
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
goto done;
err = -ENOENT;
if ((t = ipip_tunnel_locate(&p, 0)) == NULL)
goto done;
err = -EPERM;
if (t == &ipip_fb_tunnel)
goto done;
}
err = unregister_netdevice(dev);
break;
default:
err = -EINVAL;
}
done:
MOD_DEC_USE_COUNT;
return err;
}