cregit-Linux how code gets into the kernel

Release 4.11 net/netfilter/nf_conntrack_acct.c

Directory: net/netfilter
/* Accouting handling for netfilter. */

/*
 * (C) 2008 Krzysztof Piotr Oledzki <ole@ans.pl>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/netfilter.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/export.h>

#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_extend.h>
#include <net/netfilter/nf_conntrack_acct.h>


static bool nf_ct_acct __read_mostly;

module_param_named(acct, nf_ct_acct, bool, 0644);
MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");

#ifdef CONFIG_SYSCTL

static struct ctl_table acct_sysctl_table[] = {
	{
		.procname	= "nf_conntrack_acct",
		.data		= &init_net.ct.sysctl_acct,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
        },
	{}
};
#endif /* CONFIG_SYSCTL */


unsigned int seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir) { struct nf_conn_acct *acct; struct nf_conn_counter *counter; acct = nf_conn_acct_find(ct); if (!acct) return 0; counter = acct->counter; seq_printf(s, "packets=%llu bytes=%llu ", (unsigned long long)atomic64_read(&counter[dir].packets), (unsigned long long)atomic64_read(&counter[dir].bytes)); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Krzysztof Piotr Oledzki6873.12%125.00%
Holger Eitzenberger1415.05%125.00%
Eric Dumazet88.60%125.00%
Joe Perches33.23%125.00%
Total93100.00%4100.00%

; EXPORT_SYMBOL_GPL(seq_print_acct); static struct nf_ct_ext_type acct_extend __read_mostly = { .len = sizeof(struct nf_conn_acct), .align = __alignof__(struct nf_conn_acct), .id = NF_CT_EXT_ACCT, }; #ifdef CONFIG_SYSCTL
static int nf_conntrack_acct_init_sysctl(struct net *net) { struct ctl_table *table; table = kmemdup(acct_sysctl_table, sizeof(acct_sysctl_table), GFP_KERNEL); if (!table) goto out; table[0].data = &net->ct.sysctl_acct; /* Don't export sysctls to unprivileged users */ if (net->user_ns != &init_user_ns) table[0].procname = NULL; net->ct.acct_sysctl_header = register_net_sysctl(net, "net/netfilter", table); if (!net->ct.acct_sysctl_header) { printk(KERN_ERR "nf_conntrack_acct: can't register to sysctl.\n"); goto out_register; } return 0; out_register: kfree(table); out: return -ENOMEM; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan10182.79%133.33%
Eric W. Biedermann2117.21%266.67%
Total122100.00%3100.00%


static void nf_conntrack_acct_fini_sysctl(struct net *net) { struct ctl_table *table; table = net->ct.acct_sysctl_header->ctl_table_arg; unregister_net_sysctl_table(net->ct.acct_sysctl_header); kfree(table); }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan40100.00%1100.00%
Total40100.00%1100.00%

#else
static int nf_conntrack_acct_init_sysctl(struct net *net) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan14100.00%1100.00%
Total14100.00%1100.00%


static void nf_conntrack_acct_fini_sysctl(struct net *net) { }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan10100.00%1100.00%
Total10100.00%1100.00%

#endif
int nf_conntrack_acct_pernet_init(struct net *net) { net->ct.sysctl_acct = nf_ct_acct; return nf_conntrack_acct_init_sysctl(net); }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan1562.50%133.33%
Gao Feng520.83%133.33%
Krzysztof Piotr Oledzki416.67%133.33%
Total24100.00%3100.00%


void nf_conntrack_acct_pernet_fini(struct net *net) { nf_conntrack_acct_fini_sysctl(net); }

Contributors

PersonTokensPropCommitsCommitProp
Gao Feng1066.67%133.33%
Krzysztof Piotr Oledzki426.67%133.33%
Alexey Dobriyan16.67%133.33%
Total15100.00%3100.00%


int nf_conntrack_acct_init(void) { int ret = nf_ct_extend_register(&acct_extend); if (ret < 0) pr_err("nf_conntrack_acct: Unable to register extension\n"); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Gao Feng1446.67%133.33%
Krzysztof Piotr Oledzki1136.67%133.33%
Alexey Dobriyan516.67%133.33%
Total30100.00%3100.00%


void nf_conntrack_acct_fini(void) { nf_ct_extend_unregister(&acct_extend); }

Contributors

PersonTokensPropCommitsCommitProp
Krzysztof Piotr Oledzki1292.31%150.00%
Gao Feng17.69%150.00%
Total13100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Krzysztof Piotr Oledzki22243.87%19.09%
Alexey Dobriyan19939.33%19.09%
Gao Feng305.93%19.09%
Eric W. Biedermann214.15%218.18%
Holger Eitzenberger163.16%19.09%
Eric Dumazet81.58%19.09%
Joe Perches30.59%19.09%
Tejun Heo30.59%19.09%
Paul Gortmaker30.59%19.09%
Rusty Russell10.20%19.09%
Total506100.00%11100.00%
Directory: net/netfilter
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