diff options
Diffstat (limited to 'net/netfilter/nf_conntrack_acct.c')
-rw-r--r-- | net/netfilter/nf_conntrack_acct.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/net/netfilter/nf_conntrack_acct.c b/net/netfilter/nf_conntrack_acct.c new file mode 100644 index 0000000..59bd8b9 --- /dev/null +++ b/net/netfilter/nf_conntrack_acct.c @@ -0,0 +1,104 @@ +/* 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); +} |