1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
8 */
9 #include <linux/mm.h>
10 #include <linux/slab.h>
11 #include <linux/sysctl.h>
12 #include <linux/spinlock.h>
13 #include <net/ax25.h>
14
15 static int min_ipdefmode[1], max_ipdefmode[] = {1};
16 static int min_axdefmode[1], max_axdefmode[] = {1};
17 static int min_backoff[1], max_backoff[] = {2};
18 static int min_conmode[1], max_conmode[] = {2};
19 static int min_window[] = {1}, max_window[] = {7};
20 static int min_ewindow[] = {1}, max_ewindow[] = {63};
21 static int min_t1[] = {1}, max_t1[] = {30000};
22 static int min_t2[] = {1}, max_t2[] = {20000};
23 static int min_t3[1], max_t3[] = {3600000};
24 static int min_idle[1], max_idle[] = {65535000};
25 static int min_n2[] = {1}, max_n2[] = {31};
26 static int min_paclen[] = {1}, max_paclen[] = {512};
27 static int min_proto[1], max_proto[] = { AX25_PROTO_MAX };
28 #ifdef CONFIG_AX25_DAMA_SLAVE
29 static int min_ds_timeout[1], max_ds_timeout[] = {65535000};
30 #endif
31
32 static const struct ctl_table ax25_param_table[] = {
33 {
34 .procname = "ip_default_mode",
35 .maxlen = sizeof(int),
36 .mode = 0644,
37 .proc_handler = proc_dointvec_minmax,
38 .extra1 = &min_ipdefmode,
39 .extra2 = &max_ipdefmode
40 },
41 {
42 .procname = "ax25_default_mode",
43 .maxlen = sizeof(int),
44 .mode = 0644,
45 .proc_handler = proc_dointvec_minmax,
46 .extra1 = &min_axdefmode,
47 .extra2 = &max_axdefmode
48 },
49 {
50 .procname = "backoff_type",
51 .maxlen = sizeof(int),
52 .mode = 0644,
53 .proc_handler = proc_dointvec_minmax,
54 .extra1 = &min_backoff,
55 .extra2 = &max_backoff
56 },
57 {
58 .procname = "connect_mode",
59 .maxlen = sizeof(int),
60 .mode = 0644,
61 .proc_handler = proc_dointvec_minmax,
62 .extra1 = &min_conmode,
63 .extra2 = &max_conmode
64 },
65 {
66 .procname = "standard_window_size",
67 .maxlen = sizeof(int),
68 .mode = 0644,
69 .proc_handler = proc_dointvec_minmax,
70 .extra1 = &min_window,
71 .extra2 = &max_window
72 },
73 {
74 .procname = "extended_window_size",
75 .maxlen = sizeof(int),
76 .mode = 0644,
77 .proc_handler = proc_dointvec_minmax,
78 .extra1 = &min_ewindow,
79 .extra2 = &max_ewindow
80 },
81 {
82 .procname = "t1_timeout",
83 .maxlen = sizeof(int),
84 .mode = 0644,
85 .proc_handler = proc_dointvec_minmax,
86 .extra1 = &min_t1,
87 .extra2 = &max_t1
88 },
89 {
90 .procname = "t2_timeout",
91 .maxlen = sizeof(int),
92 .mode = 0644,
93 .proc_handler = proc_dointvec_minmax,
94 .extra1 = &min_t2,
95 .extra2 = &max_t2
96 },
97 {
98 .procname = "t3_timeout",
99 .maxlen = sizeof(int),
100 .mode = 0644,
101 .proc_handler = proc_dointvec_minmax,
102 .extra1 = &min_t3,
103 .extra2 = &max_t3
104 },
105 {
106 .procname = "idle_timeout",
107 .maxlen = sizeof(int),
108 .mode = 0644,
109 .proc_handler = proc_dointvec_minmax,
110 .extra1 = &min_idle,
111 .extra2 = &max_idle
112 },
113 {
114 .procname = "maximum_retry_count",
115 .maxlen = sizeof(int),
116 .mode = 0644,
117 .proc_handler = proc_dointvec_minmax,
118 .extra1 = &min_n2,
119 .extra2 = &max_n2
120 },
121 {
122 .procname = "maximum_packet_length",
123 .maxlen = sizeof(int),
124 .mode = 0644,
125 .proc_handler = proc_dointvec_minmax,
126 .extra1 = &min_paclen,
127 .extra2 = &max_paclen
128 },
129 {
130 .procname = "protocol",
131 .maxlen = sizeof(int),
132 .mode = 0644,
133 .proc_handler = proc_dointvec_minmax,
134 .extra1 = &min_proto,
135 .extra2 = &max_proto
136 },
137 #ifdef CONFIG_AX25_DAMA_SLAVE
138 {
139 .procname = "dama_slave_timeout",
140 .maxlen = sizeof(int),
141 .mode = 0644,
142 .proc_handler = proc_dointvec_minmax,
143 .extra1 = &min_ds_timeout,
144 .extra2 = &max_ds_timeout
145 },
146 #endif
147
148 { } /* that's all, folks! */
149 };
150
ax25_register_dev_sysctl(ax25_dev * ax25_dev)151 int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
152 {
153 char path[sizeof("net/ax25/") + IFNAMSIZ];
154 int k;
155 struct ctl_table *table;
156
157 table = kmemdup(ax25_param_table, sizeof(ax25_param_table), GFP_KERNEL);
158 if (!table)
159 return -ENOMEM;
160
161 for (k = 0; k < AX25_MAX_VALUES; k++)
162 table[k].data = &ax25_dev->values[k];
163
164 snprintf(path, sizeof(path), "net/ax25/%s", ax25_dev->dev->name);
165 ax25_dev->sysheader = register_net_sysctl(&init_net, path, table);
166 if (!ax25_dev->sysheader) {
167 kfree(table);
168 return -ENOMEM;
169 }
170 return 0;
171 }
172
ax25_unregister_dev_sysctl(ax25_dev * ax25_dev)173 void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev)
174 {
175 struct ctl_table_header *header = ax25_dev->sysheader;
176 struct ctl_table *table;
177
178 if (header) {
179 ax25_dev->sysheader = NULL;
180 table = header->ctl_table_arg;
181 unregister_net_sysctl_table(header);
182 kfree(table);
183 }
184 }
185
