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 | { |
| 42 | struct nf_conn_counter *acct; |
| 43 | |
| 44 | acct = nf_conn_acct_find(ct); |
| 45 | if (!acct) |
| 46 | return 0; |
| 47 | |
| 48 | return seq_printf(s, "packets=%llu bytes=%llu ", |
Eric Dumazet | b3e0bfa | 2011-12-14 14:45:20 +0100 | [diff] [blame] | 49 | (unsigned long long)atomic64_read(&acct[dir].packets), |
| 50 | (unsigned long long)atomic64_read(&acct[dir].bytes)); |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 51 | }; |
| 52 | EXPORT_SYMBOL_GPL(seq_print_acct); |
| 53 | |
| 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]), |
| 57 | .id = NF_CT_EXT_ACCT, |
| 58 | }; |
| 59 | |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 60 | #ifdef CONFIG_SYSCTL |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 61 | static int nf_conntrack_acct_init_sysctl(struct net *net) |
| 62 | { |
| 63 | struct ctl_table *table; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 64 | |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 65 | table = kmemdup(acct_sysctl_table, sizeof(acct_sysctl_table), |
| 66 | GFP_KERNEL); |
| 67 | if (!table) |
| 68 | goto out; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 69 | |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 70 | table[0].data = &net->ct.sysctl_acct; |
| 71 | |
Eric W. Biederman | ec8f23c | 2012-04-19 13:44:49 +0000 | [diff] [blame] | 72 | net->ct.acct_sysctl_header = register_net_sysctl(net, "net/netfilter", |
| 73 | table); |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 74 | if (!net->ct.acct_sysctl_header) { |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 75 | printk(KERN_ERR "nf_conntrack_acct: can't register to sysctl.\n"); |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 76 | goto out_register; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 77 | } |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 78 | return 0; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 79 | |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 80 | out_register: |
| 81 | kfree(table); |
| 82 | out: |
| 83 | return -ENOMEM; |
| 84 | } |
| 85 | |
| 86 | static void nf_conntrack_acct_fini_sysctl(struct net *net) |
| 87 | { |
| 88 | struct ctl_table *table; |
| 89 | |
| 90 | table = net->ct.acct_sysctl_header->ctl_table_arg; |
| 91 | unregister_net_sysctl_table(net->ct.acct_sysctl_header); |
| 92 | kfree(table); |
| 93 | } |
| 94 | #else |
| 95 | static int nf_conntrack_acct_init_sysctl(struct net *net) |
| 96 | { |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 97 | return 0; |
| 98 | } |
| 99 | |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 100 | static void nf_conntrack_acct_fini_sysctl(struct net *net) |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 101 | { |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 102 | } |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 103 | #endif |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 104 | |
| 105 | int nf_conntrack_acct_init(struct net *net) |
| 106 | { |
| 107 | int ret; |
| 108 | |
| 109 | net->ct.sysctl_acct = nf_ct_acct; |
| 110 | |
| 111 | if (net_eq(net, &init_net)) { |
Alexey Dobriyan | d716a4d | 2008-10-08 11:35:09 +0200 | [diff] [blame] | 112 | ret = nf_ct_extend_register(&acct_extend); |
| 113 | if (ret < 0) { |
| 114 | printk(KERN_ERR "nf_conntrack_acct: Unable to register extension\n"); |
| 115 | goto out_extend_register; |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | ret = nf_conntrack_acct_init_sysctl(net); |
| 120 | if (ret < 0) |
| 121 | goto out_sysctl; |
| 122 | |
| 123 | return 0; |
| 124 | |
| 125 | out_sysctl: |
| 126 | if (net_eq(net, &init_net)) |
| 127 | nf_ct_extend_unregister(&acct_extend); |
| 128 | out_extend_register: |
| 129 | return ret; |
| 130 | } |
| 131 | |
| 132 | void nf_conntrack_acct_fini(struct net *net) |
| 133 | { |
| 134 | nf_conntrack_acct_fini_sysctl(net); |
| 135 | if (net_eq(net, &init_net)) |
| 136 | nf_ct_extend_unregister(&acct_extend); |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 137 | } |