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Date: Sun, 22 Jun 2008 05:19:23 +0400
From: Alexey Dobriyan <adobriyan@...il.com>
To: kaber@...sh.net
Cc: netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
den@...nvz.org, xemul@...nvz.org, ebiederm@...ssion.com,
benjamin.thery@...l.net, dlezcano@...ibm.com
Subject: [PATCH 22/25] netns ct: per-netns nf_conntrack_max
Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---
include/net/netfilter/nf_conntrack.h | 1 -
include/net/netns/conntrack.h | 3 ++-
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 2 +-
net/netfilter/nf_conntrack_core.c | 12 ++++--------
net/netfilter/nf_conntrack_standalone.c | 4 ++--
5 files changed, 9 insertions(+), 13 deletions(-)
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -291,7 +291,6 @@ static inline int nf_ct_is_untracked(const struct sk_buff *skb)
extern int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp);
extern unsigned int nf_conntrack_htable_size;
extern int nf_conntrack_checksum;
-extern int nf_conntrack_max;
DECLARE_PER_CPU(struct ip_conntrack_stat, nf_conntrack_stat);
#define NF_CT_STAT_INC(count) (__get_cpu_var(nf_conntrack_stat).count++)
--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -5,7 +5,8 @@
#include <asm/atomic.h>
struct netns_ct {
- atomic_t count;
+ atomic_t count;
+ int max;
struct hlist_head *hash;
int hash_vmalloc;
unsigned int expect_count;
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -246,7 +246,7 @@ static ctl_table ip_ct_sysctl_table[] = {
{
.ctl_name = NET_IPV4_NF_CONNTRACK_MAX,
.procname = "ip_conntrack_max",
- .data = &nf_conntrack_max,
+ .data = &init_net.ct.max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -46,9 +46,6 @@ EXPORT_SYMBOL_GPL(nf_conntrack_lock);
unsigned int nf_conntrack_htable_size __read_mostly;
EXPORT_SYMBOL_GPL(nf_conntrack_htable_size);
-int nf_conntrack_max __read_mostly;
-EXPORT_SYMBOL_GPL(nf_conntrack_max);
-
struct nf_conn nf_conntrack_untracked __read_mostly;
EXPORT_SYMBOL_GPL(nf_conntrack_untracked);
@@ -473,8 +470,8 @@ struct nf_conn *nf_conntrack_alloc(struct net *net,
/* We don't want any race condition at early drop stage */
atomic_inc(&net->ct.count);
- if (nf_conntrack_max &&
- unlikely(atomic_read(&net->ct.count) > nf_conntrack_max)) {
+ if (net->ct.max &&
+ unlikely(atomic_read(&net->ct.count) > net->ct.max)) {
unsigned int hash = hash_conntrack(orig);
if (!early_drop(net, hash)) {
atomic_dec(&net->ct.count);
@@ -1160,12 +1157,11 @@ int nf_conntrack_init(struct net *net)
}
INIT_HLIST_HEAD(&net->ct.unconfirmed);
+ net->ct.max = max_factor * nf_conntrack_htable_size;
if (net == &init_net) {
- nf_conntrack_max = max_factor * nf_conntrack_htable_size;
-
printk("nf_conntrack version %s (%u buckets, %d max)\n",
NF_CONNTRACK_VERSION, nf_conntrack_htable_size,
- nf_conntrack_max);
+ net->ct.max);
nf_conntrack_cachep = kmem_cache_create("nf_conntrack",
sizeof(struct nf_conn),
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -344,7 +344,7 @@ static ctl_table nf_ct_sysctl_table[] = {
{
.ctl_name = NET_NF_CONNTRACK_MAX,
.procname = "nf_conntrack_max",
- .data = &nf_conntrack_max,
+ .data = &init_net.ct.max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
@@ -407,7 +407,7 @@ static ctl_table nf_ct_netfilter_table[] = {
{
.ctl_name = NET_NF_CONNTRACK_MAX,
.procname = "nf_conntrack_max",
- .data = &nf_conntrack_max,
+ .data = &init_net.ct.max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
--
1.5.4.5
--
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