Release 4.14 net/phonet/sysctl.c

/*
 * File: sysctl.c
 *
 * Phonet /proc/sys/net/phonet interface implementation
 *
 * Copyright (C) 2008 Nokia Corporation.
 *
 * Author: Rémi Denis-Courmont
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */

#include <linux/seqlock.h>
#include <linux/sysctl.h>
#include <linux/errno.h>
#include <linux/init.h>

#include <net/sock.h>
#include <linux/phonet.h>
#include <net/phonet/phonet.h>


#define DYNAMIC_PORT_MIN	0x40

#define DYNAMIC_PORT_MAX	0x7f

static DEFINE_SEQLOCK(local_port_range_lock);

static int local_port_range_min[2] = {0, 0};

static int local_port_range_max[2] = {1023, 1023};

static int local_port_range[2] = {DYNAMIC_PORT_MIN, DYNAMIC_PORT_MAX};

static struct ctl_table_header *phonet_table_hrd;



static void set_local_port_range(int range[2])
{
	write_seqlock(&local_port_range_lock);
	local_port_range[0] = range[0];
	local_port_range[1] = range[1];
	write_sequnlock(&local_port_range_lock);
}

Contributors
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CommitProp
Rémi Denis-Courmont
44
100.00%
1
100.00%
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44
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1
100.00%



void phonet_get_local_port_range(int *min, int *max)
{
	unsigned int seq;

	do {
		seq = read_seqbegin(&local_port_range_lock);
		if (min)
			*min = local_port_range[0];
		if (max)
			*max = local_port_range[1];
	} while (read_seqretry(&local_port_range_lock, seq));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rémi Denis-Courmont
62
98.41%
1
50.00%
Eric Dumazet
1
1.59%
1
50.00%
Total
63
100.00%
2
100.00%



static int proc_local_port_range(struct ctl_table *table, int write,
				void __user *buffer,
				size_t *lenp, loff_t *ppos)
{
	int ret;
	int range[2] = {local_port_range[0], local_port_range[1]};
	struct ctl_table tmp = {
		.data = &range,
		.maxlen = sizeof(range),
		.mode = table->mode,
		.extra1 = &local_port_range_min,
		.extra2 = &local_port_range_max,
        };

	ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);

	if (write && ret == 0) {
		if (range[1] < range[0])
			ret = -EINVAL;
		else
			set_local_port_range(range);
	}

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rémi Denis-Courmont
137
98.56%
1
50.00%
Joe Perches
2
1.44%
1
50.00%
Total
139
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2
100.00%


static struct ctl_table phonet_table[] = {
	{
		.procname	= "local_port_range",
		.data		= &local_port_range,
		.maxlen		= sizeof(local_port_range),
		.mode		= 0644,
		.proc_handler	= proc_local_port_range,
        },
	{ }
};



int __init phonet_sysctl_init(void)
{
	phonet_table_hrd = register_net_sysctl(&init_net, "net/phonet", phonet_table);
	return phonet_table_hrd == NULL ? -ENOMEM : 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rémi Denis-Courmont
25
83.33%
1
33.33%
Eric W. Biedermann
5
16.67%
2
66.67%
Total
30
100.00%
3
100.00%



void phonet_sysctl_exit(void)
{
	unregister_net_sysctl_table(phonet_table_hrd);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Rémi Denis-Courmont
11
91.67%
1
50.00%
Eric W. Biedermann
1
8.33%
1
50.00%
Total
12
100.00%
2
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Rémi Denis-Courmont
400
97.56%
3
37.50%
Eric W. Biedermann
7
1.71%
3
37.50%
Joe Perches
2
0.49%
1
12.50%
Eric Dumazet
1
0.24%
1
12.50%
Total
410
100.00%
8
100.00%
Directory: net/phonet

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