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};
24
25int __net_init unix_sysctl_register(struct net *net)
26{
27	struct ctl_table *table;
28
29	table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL);
30	if (table == NULL)
31		goto err_alloc;
32
33	/* Don't export sysctls to unprivileged users */
34	if (net->user_ns != &init_user_ns)
35		table[0].procname = NULL;
36
37	table[0].data = &net->unx.sysctl_max_dgram_qlen;
38	net->unx.ctl = register_net_sysctl(net, "net/unix", table);
 
 
 
39	if (net->unx.ctl == NULL)
40		goto err_reg;
41
42	return 0;
43
44err_reg:
45	kfree(table);
 
46err_alloc:
47	return -ENOMEM;
48}
49
50void unix_sysctl_unregister(struct net *net)
51{
52	struct ctl_table *table;
53
54	table = net->unx.ctl->ctl_table_arg;
55	unregister_net_sysctl_table(net->unx.ctl);
56	kfree(table);
 
57}

 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};
24
25int __net_init unix_sysctl_register(struct net *net)
26{
27	struct ctl_table *table;
28
29	if (net_eq(net, &init_net)) {
30		table = unix_table;
31	} else {
32		table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL);
33		if (!table)
34			goto err_alloc;
 
35
36		table[0].data = &net->unx.sysctl_max_dgram_qlen;
37	}
38
39	net->unx.ctl = register_net_sysctl_sz(net, "net/unix", table,
40					      ARRAY_SIZE(unix_table));
41	if (net->unx.ctl == NULL)
42		goto err_reg;
43
44	return 0;
45
46err_reg:
47	if (!net_eq(net, &init_net))
48		kfree(table);
49err_alloc:
50	return -ENOMEM;
51}
52
53void unix_sysctl_unregister(struct net *net)
54{
55	struct ctl_table *table;
56
57	table = net->unx.ctl->ctl_table_arg;
58	unregister_net_sysctl_table(net->unx.ctl);
59	if (!net_eq(net, &init_net))
60		kfree(table);
61}