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
nr_register_sysctl(void)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
nr_unregister_sysctl(void)154 void nr_unregister_sysctl(void)
155 {
156 unregister_net_sysctl_table(nr_table_header);
157 }
158