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[IP6TUNNEL]: Make tunnels hashes per-net. 

Move hashes in the struct ip6_tnl_net, replace tnls_xxx[] with 
ip6n->tnlx_xxx[] and handle init and exit appropriately.

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 01:23:22 -07:00 committed by David S. Miller
parent 15820e1290
commit 3e6c9fb5f5
1 changed files with 34 additions and 29 deletions
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63
net/ipv6/ip6_tunnel.c
View File

@ -84,13 +84,12 @@ static int ip6_tnl_net_id;
struct ip6_tnl_net {
/* the IPv6 tunnel fallback device */
struct net_device *fb_tnl_dev;
/* lists for storing tunnels in use */
struct ip6_tnl *tnls_r_l[HASH_SIZE];
struct ip6_tnl *tnls_wc[1];
struct ip6_tnl **tnls[2];
};
/* lists for storing tunnels in use */
static struct ip6_tnl *tnls_r_l[HASH_SIZE];
static struct ip6_tnl *tnls_wc[1];
static struct ip6_tnl **tnls[2] = { tnls_wc, tnls_r_l };
/* lock for the tunnel lists */
static DEFINE_RWLOCK(ip6_tnl_lock);
@ -139,14 +138,15 @@ ip6_tnl_lookup(struct net *net, struct in6_addr *remote, struct in6_addr *local)
unsigned h0 = HASH(remote);
unsigned h1 = HASH(local);
struct ip6_tnl *t;
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
for (t = tnls_r_l[h0 ^ h1]; t; t = t->next) {
for (t = ip6n->tnls_r_l[h0 ^ h1]; t; t = t->next) {
if (ipv6_addr_equal(local, &t->parms.laddr) &&
ipv6_addr_equal(remote, &t->parms.raddr) &&
(t->dev->flags & IFF_UP))
return t;
}
if ((t = tnls_wc[0]) != NULL && (t->dev->flags & IFF_UP))
if ((t = ip6n->tnls_wc[0]) != NULL && (t->dev->flags & IFF_UP))
return t;
return NULL;
@ -175,7 +175,7 @@ ip6_tnl_bucket(struct ip6_tnl_net *ip6n, struct ip6_tnl_parm *p)
prio = 1;
h = HASH(remote) ^ HASH(local);
}
return &tnls[prio][h];
return &ip6n->tnls[prio][h];
}
/**
@ -314,7 +314,7 @@ ip6_tnl_dev_uninit(struct net_device *dev)
if (dev == ip6n->fb_tnl_dev) {
write_lock_bh(&ip6_tnl_lock);
tnls_wc[0] = NULL;
ip6n->tnls_wc[0] = NULL;
write_unlock_bh(&ip6_tnl_lock);
} else {
ip6_tnl_unlink(ip6n, t);
@ -1378,10 +1378,13 @@ static int
ip6_fb_tnl_dev_init(struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
struct net *net = dev_net(dev);
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
ip6_tnl_dev_init_gen(dev);
t->parms.proto = IPPROTO_IPV6;
dev_hold(dev);
tnls_wc[0] = t;
ip6n->tnls_wc[0] = t;
return 0;
}
@ -1397,13 +1400,27 @@ static struct xfrm6_tunnel ip6ip6_handler = {
.priority = 1,
};
static void ip6_tnl_destroy_tunnels(struct ip6_tnl_net *ip6n)
{
int h;
struct ip6_tnl *t;
for (h = 0; h < HASH_SIZE; h++) {
while ((t = ip6n->tnls_r_l[h]) != NULL)
unregister_netdevice(t->dev);
}
t = ip6n->tnls_wc[0];
unregister_netdevice(t->dev);
}
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);
ip6n = kzalloc(sizeof(struct ip6_tnl_net), GFP_KERNEL);
if (ip6n == NULL)
goto err_alloc;
@ -1411,6 +1428,9 @@ static int ip6_tnl_init_net(struct net *net)
if (err < 0)
goto err_assign;
ip6n->tnls[0] = ip6n->tnls_wc;
ip6n->tnls[1] = ip6n->tnls_r_l;
err = -ENOMEM;
ip6n->fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0",
ip6_tnl_dev_setup);
@ -1441,6 +1461,9 @@ static void ip6_tnl_exit_net(struct net *net)
struct ip6_tnl_net *ip6n;
ip6n = net_generic(net, ip6_tnl_net_id);
rtnl_lock();
ip6_tnl_destroy_tunnels(ip6n);
rtnl_unlock();
kfree(ip6n);
}
@ -1483,20 +1506,6 @@ out:
return err;
}
static void __exit ip6_tnl_destroy_tunnels(void)
{
int h;
struct ip6_tnl *t;
for (h = 0; h < HASH_SIZE; h++) {
while ((t = tnls_r_l[h]) != NULL)
unregister_netdevice(t->dev);
}
t = tnls_wc[0];
unregister_netdevice(t->dev);
}
/**
* ip6_tunnel_cleanup - free resources and unregister protocol
**/
@ -1509,10 +1518,6 @@ static void __exit ip6_tunnel_cleanup(void)
if (xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6))
printk(KERN_INFO "ip6_tunnel close: can't deregister ip6ip6\n");
rtnl_lock();
ip6_tnl_destroy_tunnels();
rtnl_unlock();
unregister_pernet_gen_device(ip6_tnl_net_id, &ip6_tnl_net_ops);
}