1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * NET4:	Sysctl interface to net af_unix subsystem.
 4 *
 5 * Authors:	Mike Shaver.
 
 
 
 
 
 6 */
 7
 8#include <linux/mm.h>
 9#include <linux/slab.h>
10#include <linux/sysctl.h>
11
12#include <net/af_unix.h>
13
14static struct ctl_table unix_table[] = {
15	{
16		.procname	= "max_dgram_qlen",
17		.data		= &init_net.unx.sysctl_max_dgram_qlen,
18		.maxlen		= sizeof(int),
19		.mode		= 0644,
20		.proc_handler	= proc_dointvec
21	},
 
22};
23
24int __net_init unix_sysctl_register(struct net *net)
25{
26	struct ctl_table *table;
27
28	if (net_eq(net, &init_net)) {
29		table = unix_table;
30	} else {
31		table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL);
32		if (!table)
33			goto err_alloc;
34
35		table[0].data = &net->unx.sysctl_max_dgram_qlen;
36	}
37
38	net->unx.ctl = register_net_sysctl_sz(net, "net/unix", table,
39					      ARRAY_SIZE(unix_table));
40	if (net->unx.ctl == NULL)
41		goto err_reg;
42
43	return 0;
44
45err_reg:
46	if (!net_eq(net, &init_net))
47		kfree(table);
48err_alloc:
49	return -ENOMEM;
50}
51
52void unix_sysctl_unregister(struct net *net)
53{
54	const struct ctl_table *table;
55
56	table = net->unx.ctl->ctl_table_arg;
57	unregister_net_sysctl_table(net->unx.ctl);
58	if (!net_eq(net, &init_net))
59		kfree(table);
60}

 
 1/*
 2 * NET4:	Sysctl interface to net af_unix subsystem.
 3 *
 4 * Authors:	Mike Shaver.
 5 *
 6 *		This program is free software; you can redistribute it and/or
 7 *		modify it under the terms of the GNU General Public License
 8 *		as published by the Free Software Foundation; either version
 9 *		2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/mm.h>
13#include <linux/slab.h>
14#include <linux/sysctl.h>
15
16#include <net/af_unix.h>
17
18static struct ctl_table unix_table[] = {
19	{
20		.procname	= "max_dgram_qlen",
21		.data		= &init_net.unx.sysctl_max_dgram_qlen,
22		.maxlen		= sizeof(int),
23		.mode		= 0644,
24		.proc_handler	= proc_dointvec
25	},
26	{ }
27};
28
29int __net_init unix_sysctl_register(struct net *net)
30{
31	struct ctl_table *table;
32
33	table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL);
34	if (table == NULL)
35		goto err_alloc;
36
37	/* Don't export sysctls to unprivileged users */
38	if (net->user_ns != &init_user_ns)
39		table[0].procname = NULL;
 
 
40
41	table[0].data = &net->unx.sysctl_max_dgram_qlen;
42	net->unx.ctl = register_net_sysctl(net, "net/unix", table);
43	if (net->unx.ctl == NULL)
44		goto err_reg;
45
46	return 0;
47
48err_reg:
49	kfree(table);
 
50err_alloc:
51	return -ENOMEM;
52}
53
54void unix_sysctl_unregister(struct net *net)
55{
56	struct ctl_table *table;
57
58	table = net->unx.ctl->ctl_table_arg;
59	unregister_net_sysctl_table(net->unx.ctl);
60	kfree(table);
 
61}