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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13 #include <linux/netfilter.h>
14 #include <linux/slab.h>
15 #include <linux/kernel.h>
16 #include <linux/moduleparam.h>
17 #include <linux/export.h>
19 #include <net/netfilter/nf_conntrack.h>
20 #include <net/netfilter/nf_conntrack_extend.h>
21 #include <net/netfilter/nf_conntrack_acct.h>
23 static bool nf_ct_acct __read_mostly;
25 module_param_named(acct, nf_ct_acct, bool, 0644);
26 MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");
29 static struct ctl_table acct_sysctl_table[] = {
31 .procname = "nf_conntrack_acct",
32 .data = &init_net.ct.sysctl_acct,
33 .maxlen = sizeof(unsigned int),
35 .proc_handler = proc_dointvec,
39 #endif /* CONFIG_SYSCTL */
41 static const struct nf_ct_ext_type acct_extend = {
42 .len = sizeof(struct nf_conn_acct),
43 .align = __alignof__(struct nf_conn_acct),
48 static int nf_conntrack_acct_init_sysctl(struct net *net)
50 struct ctl_table *table;
52 table = kmemdup(acct_sysctl_table, sizeof(acct_sysctl_table),
57 table[0].data = &net->ct.sysctl_acct;
59 /* Don't export sysctls to unprivileged users */
60 if (net->user_ns != &init_user_ns)
61 table[0].procname = NULL;
63 net->ct.acct_sysctl_header = register_net_sysctl(net, "net/netfilter",
65 if (!net->ct.acct_sysctl_header) {
66 pr_err("can't register to sysctl\n");
77 static void nf_conntrack_acct_fini_sysctl(struct net *net)
79 struct ctl_table *table;
81 table = net->ct.acct_sysctl_header->ctl_table_arg;
82 unregister_net_sysctl_table(net->ct.acct_sysctl_header);
86 static int nf_conntrack_acct_init_sysctl(struct net *net)
91 static void nf_conntrack_acct_fini_sysctl(struct net *net)
96 int nf_conntrack_acct_pernet_init(struct net *net)
98 net->ct.sysctl_acct = nf_ct_acct;
99 return nf_conntrack_acct_init_sysctl(net);
102 void nf_conntrack_acct_pernet_fini(struct net *net)
104 nf_conntrack_acct_fini_sysctl(net);
107 int nf_conntrack_acct_init(void)
109 int ret = nf_ct_extend_register(&acct_extend);
111 pr_err("Unable to register extension\n");
115 void nf_conntrack_acct_fini(void)
117 nf_ct_extend_unregister(&acct_extend);