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 
14 #ifndef CONFIG_SYSCTL
15 #error This file should not be compiled without CONFIG_SYSCTL defined
16 #endif
17 
18 static struct ctl_table llc2_timeout_table[] = {
19 	{
20 		.procname	= "ack",
21 		.data		= &sysctl_llc2_ack_timeout,
22 		.maxlen		= sizeof(sysctl_llc2_ack_timeout),
23 		.mode		= 0644,
24 		.proc_handler   = proc_dointvec_jiffies,
25 	},
26 	{
27 		.procname	= "busy",
28 		.data		= &sysctl_llc2_busy_timeout,
29 		.maxlen		= sizeof(sysctl_llc2_busy_timeout),
30 		.mode		= 0644,
31 		.proc_handler   = proc_dointvec_jiffies,
32 	},
33 	{
34 		.procname	= "p",
35 		.data		= &sysctl_llc2_p_timeout,
36 		.maxlen		= sizeof(sysctl_llc2_p_timeout),
37 		.mode		= 0644,
38 		.proc_handler   = proc_dointvec_jiffies,
39 	},
40 	{
41 		.procname	= "rej",
42 		.data		= &sysctl_llc2_rej_timeout,
43 		.maxlen		= sizeof(sysctl_llc2_rej_timeout),
44 		.mode		= 0644,
45 		.proc_handler   = proc_dointvec_jiffies,
46 	},
47 	{ },
48 };
49 
50 static struct ctl_table llc_station_table[] = {
51 	{ },
52 };
53 
54 static struct ctl_table_header *llc2_timeout_header;
55 static struct ctl_table_header *llc_station_header;
56 
llc_sysctl_init(void)57 int __init llc_sysctl_init(void)
58 {
59 	llc2_timeout_header = register_net_sysctl(&init_net, "net/llc/llc2/timeout", llc2_timeout_table);
60 	llc_station_header = register_net_sysctl(&init_net, "net/llc/station", llc_station_table);
61 
62 	if (!llc2_timeout_header || !llc_station_header) {
63 		llc_sysctl_exit();
64 		return -ENOMEM;
65 	}
66 	return 0;
67 }
68 
llc_sysctl_exit(void)69 void llc_sysctl_exit(void)
70 {
71 	if (llc2_timeout_header) {
72 		unregister_net_sysctl_table(llc2_timeout_header);
73 		llc2_timeout_header = NULL;
74 	}
75 	if (llc_station_header) {
76 		unregister_net_sysctl_table(llc_station_header);
77 		llc_station_header = NULL;
78 	}
79 }
80