Commit | Line | Data |
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58401572 KPO |
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> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/moduleparam.h> | |
14 | ||
15 | #include <net/netfilter/nf_conntrack.h> | |
16 | #include <net/netfilter/nf_conntrack_extend.h> | |
17 | #include <net/netfilter/nf_conntrack_acct.h> | |
18 | ||
19 | #ifdef CONFIG_NF_CT_ACCT | |
20 | #define NF_CT_ACCT_DEFAULT 1 | |
21 | #else | |
22 | #define NF_CT_ACCT_DEFAULT 0 | |
23 | #endif | |
24 | ||
d716a4df | 25 | static int nf_ct_acct __read_mostly = NF_CT_ACCT_DEFAULT; |
58401572 KPO |
26 | |
27 | module_param_named(acct, nf_ct_acct, bool, 0644); | |
28 | MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting."); | |
29 | ||
30 | #ifdef CONFIG_SYSCTL | |
58401572 KPO |
31 | static struct ctl_table acct_sysctl_table[] = { |
32 | { | |
33 | .ctl_name = CTL_UNNUMBERED, | |
34 | .procname = "nf_conntrack_acct", | |
d716a4df | 35 | .data = &init_net.ct.sysctl_acct, |
58401572 KPO |
36 | .maxlen = sizeof(unsigned int), |
37 | .mode = 0644, | |
6d9f239a | 38 | .proc_handler = proc_dointvec, |
58401572 KPO |
39 | }, |
40 | {} | |
41 | }; | |
42 | #endif /* CONFIG_SYSCTL */ | |
43 | ||
44 | unsigned int | |
45 | seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir) | |
46 | { | |
47 | struct nf_conn_counter *acct; | |
48 | ||
49 | acct = nf_conn_acct_find(ct); | |
50 | if (!acct) | |
51 | return 0; | |
52 | ||
53 | return seq_printf(s, "packets=%llu bytes=%llu ", | |
54 | (unsigned long long)acct[dir].packets, | |
55 | (unsigned long long)acct[dir].bytes); | |
56 | }; | |
57 | EXPORT_SYMBOL_GPL(seq_print_acct); | |
58 | ||
59 | static struct nf_ct_ext_type acct_extend __read_mostly = { | |
60 | .len = sizeof(struct nf_conn_counter[IP_CT_DIR_MAX]), | |
61 | .align = __alignof__(struct nf_conn_counter[IP_CT_DIR_MAX]), | |
62 | .id = NF_CT_EXT_ACCT, | |
63 | }; | |
64 | ||
d716a4df AD |
65 | #ifdef CONFIG_SYSCTL |
66 | static int nf_conntrack_acct_init_sysctl(struct net *net) | |
58401572 | 67 | { |
d716a4df | 68 | struct ctl_table *table; |
58401572 | 69 | |
d716a4df AD |
70 | table = kmemdup(acct_sysctl_table, sizeof(acct_sysctl_table), |
71 | GFP_KERNEL); | |
72 | if (!table) | |
73 | goto out; | |
74 | ||
75 | table[0].data = &net->ct.sysctl_acct; | |
58401572 | 76 | |
d716a4df AD |
77 | net->ct.acct_sysctl_header = register_net_sysctl_table(net, |
78 | nf_net_netfilter_sysctl_path, table); | |
79 | if (!net->ct.acct_sysctl_header) { | |
80 | printk(KERN_ERR "nf_conntrack_acct: can't register to sysctl.\n"); | |
81 | goto out_register; | |
58401572 | 82 | } |
d716a4df | 83 | return 0; |
58401572 | 84 | |
d716a4df AD |
85 | out_register: |
86 | kfree(table); | |
87 | out: | |
88 | return -ENOMEM; | |
89 | } | |
58401572 | 90 | |
d716a4df AD |
91 | static void nf_conntrack_acct_fini_sysctl(struct net *net) |
92 | { | |
93 | struct ctl_table *table; | |
58401572 | 94 | |
d716a4df AD |
95 | table = net->ct.acct_sysctl_header->ctl_table_arg; |
96 | unregister_net_sysctl_table(net->ct.acct_sysctl_header); | |
97 | kfree(table); | |
98 | } | |
99 | #else | |
100 | static int nf_conntrack_acct_init_sysctl(struct net *net) | |
101 | { | |
102 | return 0; | |
103 | } | |
104 | ||
105 | static void nf_conntrack_acct_fini_sysctl(struct net *net) | |
106 | { | |
107 | } | |
108 | #endif | |
109 | ||
110 | int nf_conntrack_acct_init(struct net *net) | |
111 | { | |
112 | int ret; | |
113 | ||
114 | net->ct.sysctl_acct = nf_ct_acct; | |
115 | ||
116 | if (net_eq(net, &init_net)) { | |
117 | #ifdef CONFIG_NF_CT_ACCT | |
404d0ae2 | 118 | printk(KERN_WARNING "CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use\n"); |
6d60f9df | 119 | printk(KERN_WARNING "nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or\n"); |
d716a4df | 120 | printk(KERN_WARNING "sysctl net.netfilter.nf_conntrack_acct=1 to enable it.\n"); |
58401572 KPO |
121 | #endif |
122 | ||
d716a4df AD |
123 | ret = nf_ct_extend_register(&acct_extend); |
124 | if (ret < 0) { | |
125 | printk(KERN_ERR "nf_conntrack_acct: Unable to register extension\n"); | |
126 | goto out_extend_register; | |
127 | } | |
128 | } | |
129 | ||
130 | ret = nf_conntrack_acct_init_sysctl(net); | |
131 | if (ret < 0) | |
132 | goto out_sysctl; | |
133 | ||
58401572 | 134 | return 0; |
d716a4df AD |
135 | |
136 | out_sysctl: | |
137 | if (net_eq(net, &init_net)) | |
138 | nf_ct_extend_unregister(&acct_extend); | |
139 | out_extend_register: | |
140 | return ret; | |
58401572 KPO |
141 | } |
142 | ||
d716a4df | 143 | void nf_conntrack_acct_fini(struct net *net) |
58401572 | 144 | { |
d716a4df AD |
145 | nf_conntrack_acct_fini_sysctl(net); |
146 | if (net_eq(net, &init_net)) | |
147 | nf_ct_extend_unregister(&acct_extend); | |
58401572 | 148 | } |