1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *
4  * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
5  */
6 #include <linux/mm.h>
7 #include <linux/sysctl.h>
8 #include <linux/init.h>
9 #include <net/ax25.h>
10 #include <net/netrom.h>
11 
12 /*
13  *	Values taken from NET/ROM documentation.
14  */
15 static int min_quality[] = {0}, max_quality[] = {255};
16 static int min_obs[]     = {0}, max_obs[]     = {255};
17 static int min_ttl[]     = {0}, max_ttl[]     = {255};
18 static int min_t1[]      = {5 * HZ};
19 static int max_t1[]      = {600 * HZ};
20 static int min_n2[]      = {2}, max_n2[]      = {127};
21 static int min_t2[]      = {1 * HZ};
22 static int max_t2[]      = {60 * HZ};
23 static int min_t4[]      = {1 * HZ};
24 static int max_t4[]      = {1000 * HZ};
25 static int min_window[]  = {1}, max_window[]  = {127};
26 static int min_idle[]    = {0 * HZ};
27 static int max_idle[]    = {65535 * HZ};
28 static int min_route[]   = {0}, max_route[]   = {1};
29 static int min_fails[]   = {1}, max_fails[]   = {10};
30 static int min_reset[]   = {0}, max_reset[]   = {1};
31 
32 static struct ctl_table_header *nr_table_header;
33 
34 static struct ctl_table nr_table[] = {
35 	{
36 		.procname	= "default_path_quality",
37 		.data		= &sysctl_netrom_default_path_quality,
38 		.maxlen		= sizeof(int),
39 		.mode		= 0644,
40 		.proc_handler	= proc_dointvec_minmax,
41 		.extra1		= &min_quality,
42 		.extra2		= &max_quality
43 	},
44 	{
45 		.procname	= "obsolescence_count_initialiser",
46 		.data		= &sysctl_netrom_obsolescence_count_initialiser,
47 		.maxlen		= sizeof(int),
48 		.mode		= 0644,
49 		.proc_handler	= proc_dointvec_minmax,
50 		.extra1		= &min_obs,
51 		.extra2		= &max_obs
52 	},
53 	{
54 		.procname	= "network_ttl_initialiser",
55 		.data		= &sysctl_netrom_network_ttl_initialiser,
56 		.maxlen		= sizeof(int),
57 		.mode		= 0644,
58 		.proc_handler	= proc_dointvec_minmax,
59 		.extra1		= &min_ttl,
60 		.extra2		= &max_ttl
61 	},
62 	{
63 		.procname	= "transport_timeout",
64 		.data		= &sysctl_netrom_transport_timeout,
65 		.maxlen		= sizeof(int),
66 		.mode		= 0644,
67 		.proc_handler	= proc_dointvec_minmax,
68 		.extra1		= &min_t1,
69 		.extra2		= &max_t1
70 	},
71 	{
72 		.procname	= "transport_maximum_tries",
73 		.data		= &sysctl_netrom_transport_maximum_tries,
74 		.maxlen		= sizeof(int),
75 		.mode		= 0644,
76 		.proc_handler	= proc_dointvec_minmax,
77 		.extra1		= &min_n2,
78 		.extra2		= &max_n2
79 	},
80 	{
81 		.procname	= "transport_acknowledge_delay",
82 		.data		= &sysctl_netrom_transport_acknowledge_delay,
83 		.maxlen		= sizeof(int),
84 		.mode		= 0644,
85 		.proc_handler	= proc_dointvec_minmax,
86 		.extra1		= &min_t2,
87 		.extra2		= &max_t2
88 	},
89 	{
90 		.procname	= "transport_busy_delay",
91 		.data		= &sysctl_netrom_transport_busy_delay,
92 		.maxlen		= sizeof(int),
93 		.mode		= 0644,
94 		.proc_handler	= proc_dointvec_minmax,
95 		.extra1		= &min_t4,
96 		.extra2		= &max_t4
97 	},
98 	{
99 		.procname	= "transport_requested_window_size",
100 		.data		= &sysctl_netrom_transport_requested_window_size,
101 		.maxlen		= sizeof(int),
102 		.mode		= 0644,
103 		.proc_handler	= proc_dointvec_minmax,
104 		.extra1		= &min_window,
105 		.extra2		= &max_window
106 	},
107 	{
108 		.procname	= "transport_no_activity_timeout",
109 		.data		= &sysctl_netrom_transport_no_activity_timeout,
110 		.maxlen		= sizeof(int),
111 		.mode		= 0644,
112 		.proc_handler	= proc_dointvec_minmax,
113 		.extra1		= &min_idle,
114 		.extra2		= &max_idle
115 	},
116 	{
117 		.procname	= "routing_control",
118 		.data		= &sysctl_netrom_routing_control,
119 		.maxlen		= sizeof(int),
120 		.mode		= 0644,
121 		.proc_handler	= proc_dointvec_minmax,
122 		.extra1		= &min_route,
123 		.extra2		= &max_route
124 	},
125 	{
126 		.procname	= "link_fails_count",
127 		.data		= &sysctl_netrom_link_fails_count,
128 		.maxlen		= sizeof(int),
129 		.mode		= 0644,
130 		.proc_handler	= proc_dointvec_minmax,
131 		.extra1		= &min_fails,
132 		.extra2		= &max_fails
133 	},
134 	{
135 		.procname	= "reset",
136 		.data		= &sysctl_netrom_reset_circuit,
137 		.maxlen		= sizeof(int),
138 		.mode		= 0644,
139 		.proc_handler	= proc_dointvec_minmax,
140 		.extra1		= &min_reset,
141 		.extra2		= &max_reset
142 	},
143 	{ }
144 };
145 
146 int __init nr_register_sysctl(void)
147 {
148 	nr_table_header = register_net_sysctl(&init_net, "net/netrom", nr_table);
149 	if (!nr_table_header)
150 		return -ENOMEM;
151 	return 0;
152 }
153 
154 void nr_unregister_sysctl(void)
155 {
156 	unregister_net_sysctl_table(nr_table_header);
157 }
158