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![Alexey Dobriyan](/assets/img/avatar_default.png)
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
148 lines
3.4 KiB
C
148 lines
3.4 KiB
C
/* Accouting handling for netfilter. */
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/*
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* (C) 2008 Krzysztof Piotr Oledzki <ole@ans.pl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/netfilter.h>
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#include <linux/kernel.h>
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#include <linux/moduleparam.h>
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#include <net/netfilter/nf_conntrack.h>
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#include <net/netfilter/nf_conntrack_extend.h>
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#include <net/netfilter/nf_conntrack_acct.h>
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#ifdef CONFIG_NF_CT_ACCT
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#define NF_CT_ACCT_DEFAULT 1
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#else
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#define NF_CT_ACCT_DEFAULT 0
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#endif
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static int nf_ct_acct __read_mostly = NF_CT_ACCT_DEFAULT;
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module_param_named(acct, nf_ct_acct, bool, 0644);
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MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");
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#ifdef CONFIG_SYSCTL
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static struct ctl_table acct_sysctl_table[] = {
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "nf_conntrack_acct",
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.data = &init_net.ct.sysctl_acct,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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{}
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};
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#endif /* CONFIG_SYSCTL */
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unsigned int
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seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
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{
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struct nf_conn_counter *acct;
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acct = nf_conn_acct_find(ct);
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if (!acct)
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return 0;
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return seq_printf(s, "packets=%llu bytes=%llu ",
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(unsigned long long)acct[dir].packets,
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(unsigned long long)acct[dir].bytes);
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};
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EXPORT_SYMBOL_GPL(seq_print_acct);
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static struct nf_ct_ext_type acct_extend __read_mostly = {
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.len = sizeof(struct nf_conn_counter[IP_CT_DIR_MAX]),
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.align = __alignof__(struct nf_conn_counter[IP_CT_DIR_MAX]),
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.id = NF_CT_EXT_ACCT,
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};
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#ifdef CONFIG_SYSCTL
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static int nf_conntrack_acct_init_sysctl(struct net *net)
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{
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struct ctl_table *table;
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table = kmemdup(acct_sysctl_table, sizeof(acct_sysctl_table),
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GFP_KERNEL);
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if (!table)
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goto out;
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table[0].data = &net->ct.sysctl_acct;
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net->ct.acct_sysctl_header = register_net_sysctl_table(net,
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nf_net_netfilter_sysctl_path, table);
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if (!net->ct.acct_sysctl_header) {
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printk(KERN_ERR "nf_conntrack_acct: can't register to sysctl.\n");
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goto out_register;
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}
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return 0;
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out_register:
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kfree(table);
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out:
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return -ENOMEM;
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}
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static void nf_conntrack_acct_fini_sysctl(struct net *net)
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{
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struct ctl_table *table;
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table = net->ct.acct_sysctl_header->ctl_table_arg;
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unregister_net_sysctl_table(net->ct.acct_sysctl_header);
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kfree(table);
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}
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#else
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static int nf_conntrack_acct_init_sysctl(struct net *net)
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{
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return 0;
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}
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static void nf_conntrack_acct_fini_sysctl(struct net *net)
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{
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}
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#endif
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int nf_conntrack_acct_init(struct net *net)
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{
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int ret;
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net->ct.sysctl_acct = nf_ct_acct;
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if (net_eq(net, &init_net)) {
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#ifdef CONFIG_NF_CT_ACCT
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printk(KERN_WARNING "CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Plase use\n");
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printk(KERN_WARNING "nf_conntrack.acct=1 kernel paramater, acct=1 nf_conntrack module option or\n");
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printk(KERN_WARNING "sysctl net.netfilter.nf_conntrack_acct=1 to enable it.\n");
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#endif
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ret = nf_ct_extend_register(&acct_extend);
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if (ret < 0) {
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printk(KERN_ERR "nf_conntrack_acct: Unable to register extension\n");
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goto out_extend_register;
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}
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}
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ret = nf_conntrack_acct_init_sysctl(net);
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if (ret < 0)
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goto out_sysctl;
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return 0;
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out_sysctl:
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if (net_eq(net, &init_net))
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nf_ct_extend_unregister(&acct_extend);
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out_extend_register:
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return ret;
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}
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void nf_conntrack_acct_fini(struct net *net)
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{
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nf_conntrack_acct_fini_sysctl(net);
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if (net_eq(net, &init_net))
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nf_ct_extend_unregister(&acct_extend);
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}
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