[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>
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 511a6c4..7d2aa6e 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -84,13 +84,12 @@
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 @@
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 @@
prio = 1;
h = HASH(remote) ^ HASH(local);
}
- return &tnls[prio][h];
+ return &ip6n->tnls[prio][h];
}
/**
@@ -314,7 +314,7 @@
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 @@
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 @@
.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 @@
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 @@
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 @@
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 @@
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);
}