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Date: Tue, 15 Apr 2008 16:58:48 +0400
From: Pavel Emelyanov <xemul@...nvz.org>
To: David Miller <davem@...emloft.net>
CC: Linux Netdev List <netdev@...r.kernel.org>
Subject: [PATCH net-2.6.26 5/8][GRE]: Make tunnels hashes per-net.
Very similar to what was done for the IPIP code.
Signed-off-by: Pavel Emelyanov <xemul@...nvz.org>
---
net/ipv4/ip_gre.c | 65 +++++++++++++++++++++++++---------------------------
1 files changed, 31 insertions(+), 34 deletions(-)
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index a8ec090..74d4c51 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -124,8 +124,12 @@ static void ipgre_tunnel_setup(struct net_device *dev);
static int ipgre_fb_tunnel_init(struct net_device *dev);
+#define HASH_SIZE 16
+
static int ipgre_net_id;
struct ipgre_net {
+ struct ip_tunnel *tunnels[4][HASH_SIZE];
+
struct net_device *fb_tunnel_dev;
};
@@ -147,15 +151,12 @@ struct ipgre_net {
will match fallback tunnel.
*/
-#define HASH_SIZE 16
#define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF)
-static struct ip_tunnel *tunnels[4][HASH_SIZE];
-
-#define tunnels_r_l (tunnels[3])
-#define tunnels_r (tunnels[2])
-#define tunnels_l (tunnels[1])
-#define tunnels_wc (tunnels[0])
+#define tunnels_r_l tunnels[3]
+#define tunnels_r tunnels[2]
+#define tunnels_l tunnels[1]
+#define tunnels_wc tunnels[0]
static DEFINE_RWLOCK(ipgre_lock);
@@ -169,19 +170,19 @@ static struct ip_tunnel * ipgre_tunnel_lookup(struct net *net,
struct ip_tunnel *t;
struct ipgre_net *ign = net_generic(net, ipgre_net_id);
- for (t = tunnels_r_l[h0^h1]; t; t = t->next) {
+ for (t = ign->tunnels_r_l[h0^h1]; t; t = t->next) {
if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr) {
if (t->parms.i_key == key && (t->dev->flags&IFF_UP))
return t;
}
}
- for (t = tunnels_r[h0^h1]; t; t = t->next) {
+ for (t = ign->tunnels_r[h0^h1]; t; t = t->next) {
if (remote == t->parms.iph.daddr) {
if (t->parms.i_key == key && (t->dev->flags&IFF_UP))
return t;
}
}
- for (t = tunnels_l[h1]; t; t = t->next) {
+ for (t = ign->tunnels_l[h1]; t; t = t->next) {
if (local == t->parms.iph.saddr ||
(local == t->parms.iph.daddr &&
ipv4_is_multicast(local))) {
@@ -189,7 +190,7 @@ static struct ip_tunnel * ipgre_tunnel_lookup(struct net *net,
return t;
}
}
- for (t = tunnels_wc[h1]; t; t = t->next) {
+ for (t = ign->tunnels_wc[h1]; t; t = t->next) {
if (t->parms.i_key == key && (t->dev->flags&IFF_UP))
return t;
}
@@ -215,7 +216,7 @@ static struct ip_tunnel **__ipgre_bucket(struct ipgre_net *ign,
h ^= HASH(remote);
}
- return &tunnels[prio][h];
+ return &ign->tunnels[prio][h];
}
static inline struct ip_tunnel **ipgre_bucket(struct ipgre_net *ign,
@@ -1274,6 +1275,7 @@ static int ipgre_fb_tunnel_init(struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
struct iphdr *iph = &tunnel->parms.iph;
+ struct ipgre_net *ign = net_generic(dev_net(dev), ipgre_net_id);
tunnel->dev = dev;
strcpy(tunnel->parms.name, dev->name);
@@ -1284,7 +1286,7 @@ static int ipgre_fb_tunnel_init(struct net_device *dev)
tunnel->hlen = sizeof(struct iphdr) + 4;
dev_hold(dev);
- tunnels_wc[0] = tunnel;
+ ign->tunnels_wc[0] = tunnel;
return 0;
}
@@ -1294,13 +1296,27 @@ static struct net_protocol ipgre_protocol = {
.err_handler = ipgre_err,
};
+static void ipgre_destroy_tunnels(struct ipgre_net *ign)
+{
+ int prio;
+
+ for (prio = 0; prio < 4; prio++) {
+ int h;
+ for (h = 0; h < HASH_SIZE; h++) {
+ struct ip_tunnel *t;
+ while ((t = ign->tunnels[prio][h]) != NULL)
+ unregister_netdevice(t->dev);
+ }
+ }
+}
+
static int ipgre_init_net(struct net *net)
{
int err;
struct ipgre_net *ign;
err = -ENOMEM;
- ign = kmalloc(sizeof(struct ipgre_net), GFP_KERNEL);
+ ign = kzalloc(sizeof(struct ipgre_net), GFP_KERNEL);
if (ign == NULL)
goto err_alloc;
@@ -1339,8 +1355,7 @@ static void ipgre_exit_net(struct net *net)
ign = net_generic(net, ipgre_net_id);
rtnl_lock();
- if (net != &init_net)
- unregister_netdevice(ign->fb_tunnel_dev);
+ ipgre_destroy_tunnels(ign);
rtnl_unlock();
kfree(ign);
}
@@ -1372,29 +1387,11 @@ static int __init ipgre_init(void)
return err;
}
-static void __exit ipgre_destroy_tunnels(void)
-{
- int prio;
-
- for (prio = 0; prio < 4; prio++) {
- int h;
- for (h = 0; h < HASH_SIZE; h++) {
- struct ip_tunnel *t;
- while ((t = tunnels[prio][h]) != NULL)
- unregister_netdevice(t->dev);
- }
- }
-}
-
static void __exit ipgre_fini(void)
{
if (inet_del_protocol(&ipgre_protocol, IPPROTO_GRE) < 0)
printk(KERN_INFO "ipgre close: can't remove protocol\n");
- rtnl_lock();
- ipgre_destroy_tunnels();
- rtnl_unlock();
-
unregister_pernet_gen_device(ipgre_net_id, &ipgre_net_ops);
}
--
1.5.3.4
--
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