![Arushi Singhal](/assets/img/avatar_default.png)
Using pr_<loglevel>() is more concise than printk(KERN_<LOGLEVEL>). This patch: * Replace printks having a log level with the appropriate pr_*() macros. * Define pr_fmt() to include relevant name. * Remove redundant prefixes from pr_*() calls. * Indent the code where possible. * Remove the useless output messages. * Remove periods from messages. Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
138 lines
3 KiB
C
138 lines
3 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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/netfilter.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/moduleparam.h>
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#include <linux/export.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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static bool nf_ct_acct __read_mostly;
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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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.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_acct *acct;
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struct nf_conn_counter *counter;
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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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counter = acct->counter;
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seq_printf(s, "packets=%llu bytes=%llu ",
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(unsigned long long)atomic64_read(&counter[dir].packets),
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(unsigned long long)atomic64_read(&counter[dir].bytes));
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return 0;
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};
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EXPORT_SYMBOL_GPL(seq_print_acct);
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static const struct nf_ct_ext_type acct_extend = {
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.len = sizeof(struct nf_conn_acct),
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.align = __alignof__(struct nf_conn_acct),
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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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/* Don't export sysctls to unprivileged users */
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if (net->user_ns != &init_user_ns)
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table[0].procname = NULL;
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net->ct.acct_sysctl_header = register_net_sysctl(net, "net/netfilter",
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table);
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if (!net->ct.acct_sysctl_header) {
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pr_err("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_pernet_init(struct net *net)
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{
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net->ct.sysctl_acct = nf_ct_acct;
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return nf_conntrack_acct_init_sysctl(net);
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}
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void nf_conntrack_acct_pernet_fini(struct net *net)
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{
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nf_conntrack_acct_fini_sysctl(net);
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}
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int nf_conntrack_acct_init(void)
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{
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int ret = nf_ct_extend_register(&acct_extend);
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if (ret < 0)
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pr_err("Unable to register extension\n");
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return ret;
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}
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void nf_conntrack_acct_fini(void)
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{
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nf_ct_extend_unregister(&acct_extend);
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}
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