1
/* Accouting handling for netfilter. */
4
* (C) 2008 Krzysztof Piotr Oledzki <ole@ans.pl>
6
* This program is free software; you can redistribute it and/or modify
7
* it under the terms of the GNU General Public License version 2 as
8
* published by the Free Software Foundation.
11
#include <linux/netfilter.h>
12
#include <linux/slab.h>
13
#include <linux/kernel.h>
14
#include <linux/moduleparam.h>
15
#include <linux/export.h>
17
#include <net/netfilter/nf_conntrack.h>
18
#include <net/netfilter/nf_conntrack_extend.h>
19
#include <net/netfilter/nf_conntrack_acct.h>
21
static int nf_ct_acct __read_mostly;
23
module_param_named(acct, nf_ct_acct, bool, 0644);
24
MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");
27
static struct ctl_table acct_sysctl_table[] = {
29
.procname = "nf_conntrack_acct",
30
.data = &init_net.ct.sysctl_acct,
31
.maxlen = sizeof(unsigned int),
33
.proc_handler = proc_dointvec,
37
#endif /* CONFIG_SYSCTL */
40
seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
42
struct nf_conn_counter *acct;
44
acct = nf_conn_acct_find(ct);
48
return seq_printf(s, "packets=%llu bytes=%llu ",
49
(unsigned long long)acct[dir].packets,
50
(unsigned long long)acct[dir].bytes);
52
EXPORT_SYMBOL_GPL(seq_print_acct);
54
static struct nf_ct_ext_type acct_extend __read_mostly = {
55
.len = sizeof(struct nf_conn_counter[IP_CT_DIR_MAX]),
56
.align = __alignof__(struct nf_conn_counter[IP_CT_DIR_MAX]),
61
static int nf_conntrack_acct_init_sysctl(struct net *net)
63
struct ctl_table *table;
65
table = kmemdup(acct_sysctl_table, sizeof(acct_sysctl_table),
70
table[0].data = &net->ct.sysctl_acct;
72
net->ct.acct_sysctl_header = register_net_sysctl_table(net,
73
nf_net_netfilter_sysctl_path, table);
74
if (!net->ct.acct_sysctl_header) {
75
printk(KERN_ERR "nf_conntrack_acct: can't register to sysctl.\n");
86
static void nf_conntrack_acct_fini_sysctl(struct net *net)
88
struct ctl_table *table;
90
table = net->ct.acct_sysctl_header->ctl_table_arg;
91
unregister_net_sysctl_table(net->ct.acct_sysctl_header);
95
static int nf_conntrack_acct_init_sysctl(struct net *net)
100
static void nf_conntrack_acct_fini_sysctl(struct net *net)
105
int nf_conntrack_acct_init(struct net *net)
109
net->ct.sysctl_acct = nf_ct_acct;
111
if (net_eq(net, &init_net)) {
112
ret = nf_ct_extend_register(&acct_extend);
114
printk(KERN_ERR "nf_conntrack_acct: Unable to register extension\n");
115
goto out_extend_register;
119
ret = nf_conntrack_acct_init_sysctl(net);
126
if (net_eq(net, &init_net))
127
nf_ct_extend_unregister(&acct_extend);
132
void nf_conntrack_acct_fini(struct net *net)
134
nf_conntrack_acct_fini_sysctl(net);
135
if (net_eq(net, &init_net))
136
nf_ct_extend_unregister(&acct_extend);