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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | /* Accouting handling for netfilter. */
/*
* (C) 2008 Krzysztof Piotr Oledzki <ole@ans.pl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/netfilter.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_extend.h>
#include <net/netfilter/nf_conntrack_acct.h>
#ifdef CONFIG_NF_CT_ACCT
#define NF_CT_ACCT_DEFAULT 1
#else
#define NF_CT_ACCT_DEFAULT 0
#endif
int nf_ct_acct __read_mostly = NF_CT_ACCT_DEFAULT;
EXPORT_SYMBOL_GPL(nf_ct_acct);
module_param_named(acct, nf_ct_acct, bool, 0644);
MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");
#ifdef CONFIG_SYSCTL
static struct ctl_table_header *acct_sysctl_header;
static struct ctl_table acct_sysctl_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_acct",
.data = &nf_ct_acct,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{}
};
#endif /* CONFIG_SYSCTL */
unsigned int
seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
{
struct nf_conn_counter *acct;
acct = nf_conn_acct_find(ct);
if (!acct)
return 0;
return seq_printf(s, "packets=%llu bytes=%llu ",
(unsigned long long)acct[dir].packets,
(unsigned long long)acct[dir].bytes);
};
EXPORT_SYMBOL_GPL(seq_print_acct);
static struct nf_ct_ext_type acct_extend __read_mostly = {
.len = sizeof(struct nf_conn_counter[IP_CT_DIR_MAX]),
.align = __alignof__(struct nf_conn_counter[IP_CT_DIR_MAX]),
.id = NF_CT_EXT_ACCT,
};
int nf_conntrack_acct_init(void)
{
int ret;
#ifdef CONFIG_NF_CT_ACCT
printk(KERN_WARNING "CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Plase use\n");
printk(KERN_WARNING "nf_conntrack.acct=1 kernel paramater, acct=1 nf_conntrack module option or\n");
printk(KERN_WARNING "sysctl net.netfilter.nf_conntrack_acct=1 to enable it.\n");
#endif
ret = nf_ct_extend_register(&acct_extend);
if (ret < 0) {
printk(KERN_ERR "nf_conntrack_acct: Unable to register extension\n");
return ret;
}
#ifdef CONFIG_SYSCTL
acct_sysctl_header = register_sysctl_paths(nf_net_netfilter_sysctl_path,
acct_sysctl_table);
if (!acct_sysctl_header) {
nf_ct_extend_unregister(&acct_extend);
printk(KERN_ERR "nf_conntrack_acct: can't register to sysctl.\n");
return -ENOMEM;
}
#endif
return 0;
}
void nf_conntrack_acct_fini(void)
{
#ifdef CONFIG_SYSCTL
unregister_sysctl_table(acct_sysctl_header);
#endif
nf_ct_extend_unregister(&acct_extend);
}
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