sysctl_net_llc.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * sysctl_net_llc.c: sysctl interface to LLC net subsystem.
 4 *
 5 * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 6 */
 7
 8#include <linux/mm.h>
 9#include <linux/init.h>
10#include <linux/sysctl.h>
11#include <net/net_namespace.h>
12#include <net/llc.h>
13
14static struct ctl_table llc2_timeout_table[] = {
15	{
16		.procname	= "ack",
17		.data		= &sysctl_llc2_ack_timeout,
18		.maxlen		= sizeof(sysctl_llc2_ack_timeout),
19		.mode		= 0644,
20		.proc_handler   = proc_dointvec_jiffies,
21	},
22	{
23		.procname	= "busy",
24		.data		= &sysctl_llc2_busy_timeout,
25		.maxlen		= sizeof(sysctl_llc2_busy_timeout),
26		.mode		= 0644,
27		.proc_handler   = proc_dointvec_jiffies,
28	},
29	{
30		.procname	= "p",
31		.data		= &sysctl_llc2_p_timeout,
32		.maxlen		= sizeof(sysctl_llc2_p_timeout),
33		.mode		= 0644,
34		.proc_handler   = proc_dointvec_jiffies,
35	},
36	{
37		.procname	= "rej",
38		.data		= &sysctl_llc2_rej_timeout,
39		.maxlen		= sizeof(sysctl_llc2_rej_timeout),
40		.mode		= 0644,
41		.proc_handler   = proc_dointvec_jiffies,
42	},
43};
44
45static struct ctl_table_header *llc2_timeout_header;
46static struct ctl_table_header *llc_station_header;
47
48int __init llc_sysctl_init(void)
49{
50	struct ctl_table empty[1] = {};
51	llc2_timeout_header = register_net_sysctl(&init_net, "net/llc/llc2/timeout", llc2_timeout_table);
52	llc_station_header = register_net_sysctl_sz(&init_net, "net/llc/station", empty, 0);
53
54	if (!llc2_timeout_header || !llc_station_header) {
55		llc_sysctl_exit();
56		return -ENOMEM;
57	}
58	return 0;
59}
60
61void llc_sysctl_exit(void)
62{
63	if (llc2_timeout_header) {
64		unregister_net_sysctl_table(llc2_timeout_header);
65		llc2_timeout_header = NULL;
66	}
67	if (llc_station_header) {
68		unregister_net_sysctl_table(llc_station_header);
69		llc_station_header = NULL;
70	}
71}