Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 1 | /* Accouting handling for netfilter. */ |
| 2 | |
| 3 | /* |
| 4 | * (C) 2008 Krzysztof Piotr Oledzki <ole@ans.pl> |
| 5 | * |
| 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. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/netfilter.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 12 | #include <linux/slab.h> |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 13 | #include <linux/kernel.h> |
| 14 | #include <linux/moduleparam.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 15 | #include <linux/export.h> |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 16 | |
| 17 | #include <net/netfilter/nf_conntrack.h> |
| 18 | #include <net/netfilter/nf_conntrack_extend.h> |
| 19 | #include <net/netfilter/nf_conntrack_acct.h> |
| 20 | |
Rusty Russell | eb93992 | 2011-12-19 14:08:01 +0000 | [diff] [blame] | 21 | static bool nf_ct_acct __read_mostly; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 22 | |
| 23 | module_param_named(acct, nf_ct_acct, bool, 0644); |
| 24 | MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting."); |
| 25 | |
| 26 | #ifdef CONFIG_SYSCTL |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 27 | static struct ctl_table acct_sysctl_table[] = { |
| 28 | { |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 29 | .procname = "nf_conntrack_acct", |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 30 | .data = &init_net.ct.sysctl_acct, |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 31 | .maxlen = sizeof(unsigned int), |
| 32 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 33 | .proc_handler = proc_dointvec, |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 34 | }, |
| 35 | {} |
| 36 | }; |
| 37 | #endif /* CONFIG_SYSCTL */ |
| 38 | |
| 39 | unsigned int |
| 40 | seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir) |
| 41 | { |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame] | 42 | struct nf_conn_acct *acct; |
| 43 | struct nf_conn_counter *counter; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 44 | |
| 45 | acct = nf_conn_acct_find(ct); |
| 46 | if (!acct) |
| 47 | return 0; |
| 48 | |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame] | 49 | counter = acct->counter; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 50 | return seq_printf(s, "packets=%llu bytes=%llu ", |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame] | 51 | (unsigned long long)atomic64_read(&counter[dir].packets), |
| 52 | (unsigned long long)atomic64_read(&counter[dir].bytes)); |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 53 | }; |
| 54 | EXPORT_SYMBOL_GPL(seq_print_acct); |
| 55 | |
| 56 | static struct nf_ct_ext_type acct_extend __read_mostly = { |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame] | 57 | .len = sizeof(struct nf_conn_acct), |
| 58 | .align = __alignof__(struct nf_conn_acct), |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 59 | .id = NF_CT_EXT_ACCT, |
| 60 | }; |
| 61 | |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 62 | #ifdef CONFIG_SYSCTL |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 63 | static int nf_conntrack_acct_init_sysctl(struct net *net) |
| 64 | { |
| 65 | struct ctl_table *table; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 66 | |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 67 | table = kmemdup(acct_sysctl_table, sizeof(acct_sysctl_table), |
| 68 | GFP_KERNEL); |
| 69 | if (!table) |
| 70 | goto out; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 71 | |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 72 | table[0].data = &net->ct.sysctl_acct; |
| 73 | |
Eric W. Biederman | 464dc80 | 2012-11-16 03:02:59 +0000 | [diff] [blame] | 74 | /* Don't export sysctls to unprivileged users */ |
| 75 | if (net->user_ns != &init_user_ns) |
| 76 | table[0].procname = NULL; |
| 77 | |
Eric W. Biederman | ec8f23c | 2012-04-19 13:44:49 +0000 | [diff] [blame] | 78 | net->ct.acct_sysctl_header = register_net_sysctl(net, "net/netfilter", |
| 79 | table); |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 80 | if (!net->ct.acct_sysctl_header) { |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 81 | printk(KERN_ERR "nf_conntrack_acct: can't register to sysctl.\n"); |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 82 | goto out_register; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 83 | } |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 84 | return 0; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 85 | |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 86 | out_register: |
| 87 | kfree(table); |
| 88 | out: |
| 89 | return -ENOMEM; |
| 90 | } |
| 91 | |
| 92 | static void nf_conntrack_acct_fini_sysctl(struct net *net) |
| 93 | { |
| 94 | struct ctl_table *table; |
| 95 | |
| 96 | table = net->ct.acct_sysctl_header->ctl_table_arg; |
| 97 | unregister_net_sysctl_table(net->ct.acct_sysctl_header); |
| 98 | kfree(table); |
| 99 | } |
| 100 | #else |
| 101 | static int nf_conntrack_acct_init_sysctl(struct net *net) |
| 102 | { |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 103 | return 0; |
| 104 | } |
| 105 | |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 106 | static void nf_conntrack_acct_fini_sysctl(struct net *net) |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 107 | { |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 108 | } |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 109 | #endif |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 110 | |
Gao feng | b7ff3a1 | 2013-01-21 22:10:26 +0000 | [diff] [blame] | 111 | int nf_conntrack_acct_pernet_init(struct net *net) |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 112 | { |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 113 | net->ct.sysctl_acct = nf_ct_acct; |
Gao feng | b7ff3a1 | 2013-01-21 22:10:26 +0000 | [diff] [blame] | 114 | return nf_conntrack_acct_init_sysctl(net); |
| 115 | } |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 116 | |
Gao feng | b7ff3a1 | 2013-01-21 22:10:26 +0000 | [diff] [blame] | 117 | void nf_conntrack_acct_pernet_fini(struct net *net) |
| 118 | { |
| 119 | nf_conntrack_acct_fini_sysctl(net); |
| 120 | } |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 121 | |
Gao feng | b7ff3a1 | 2013-01-21 22:10:26 +0000 | [diff] [blame] | 122 | int nf_conntrack_acct_init(void) |
| 123 | { |
| 124 | int ret = nf_ct_extend_register(&acct_extend); |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 125 | if (ret < 0) |
Gao feng | b7ff3a1 | 2013-01-21 22:10:26 +0000 | [diff] [blame] | 126 | pr_err("nf_conntrack_acct: Unable to register extension\n"); |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 127 | return ret; |
| 128 | } |
| 129 | |
Gao feng | b7ff3a1 | 2013-01-21 22:10:26 +0000 | [diff] [blame] | 130 | void nf_conntrack_acct_fini(void) |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 131 | { |
Gao feng | b7ff3a1 | 2013-01-21 22:10:26 +0000 | [diff] [blame] | 132 | nf_ct_extend_unregister(&acct_extend); |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 133 | } |