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/sysctl.h>
11 #include <linux/spinlock.h>
12 #include <net/ax25.h>
13
14 static int min_ipdefmode[1], max_ipdefmode[] = {1};
15 static int min_axdefmode[1], max_axdefmode[] = {1};
16 static int min_backoff[1], max_backoff[] = {2};
17 static int min_conmode[1], max_conmode[] = {2};
18 static int min_window[] = {1}, max_window[] = {7};
19 static int min_ewindow[] = {1}, max_ewindow[] = {63};
20 static int min_t1[] = {1}, max_t1[] = {30000};
21 static int min_t2[] = {1}, max_t2[] = {20000};
22 static int min_t3[1], max_t3[] = {3600000};
23 static int min_idle[1], max_idle[] = {65535000};
24 static int min_n2[] = {1}, max_n2[] = {31};
25 static int min_paclen[] = {1}, max_paclen[] = {512};
26 static int min_proto[1], max_proto[] = { AX25_PROTO_MAX };
27 static int min_ds_timeout[1], max_ds_timeout[] = {65535000};
28
29 static struct ctl_table_header *ax25_table_header;
30
31 static ctl_table *ax25_table;
32 static int ax25_table_size;
33
34 static struct ctl_path ax25_path[] = {
35 { .procname = "net", .ctl_name = CTL_NET, },
36 { .procname = "ax25", .ctl_name = NET_AX25, },
37 { }
38 };
39 static const ctl_table ax25_param_table[] = {
40 {
41 .ctl_name = NET_AX25_IP_DEFAULT_MODE,
42 .procname = "ip_default_mode",
43 .maxlen = sizeof(int),
44 .mode = 0644,
45 .proc_handler = &proc_dointvec_minmax,
46 .strategy = &sysctl_intvec,
47 .extra1 = &min_ipdefmode,
48 .extra2 = &max_ipdefmode
49 },
50 {
51 .ctl_name = NET_AX25_DEFAULT_MODE,
52 .procname = "ax25_default_mode",
53 .maxlen = sizeof(int),
54 .mode = 0644,
55 .proc_handler = &proc_dointvec_minmax,
56 .strategy = &sysctl_intvec,
57 .extra1 = &min_axdefmode,
58 .extra2 = &max_axdefmode
59 },
60 {
61 .ctl_name = NET_AX25_BACKOFF_TYPE,
62 .procname = "backoff_type",
63 .maxlen = sizeof(int),
64 .mode = 0644,
65 .proc_handler = &proc_dointvec_minmax,
66 .strategy = &sysctl_intvec,
67 .extra1 = &min_backoff,
68 .extra2 = &max_backoff
69 },
70 {
71 .ctl_name = NET_AX25_CONNECT_MODE,
72 .procname = "connect_mode",
73 .maxlen = sizeof(int),
74 .mode = 0644,
75 .proc_handler = &proc_dointvec_minmax,
76 .strategy = &sysctl_intvec,
77 .extra1 = &min_conmode,
78 .extra2 = &max_conmode
79 },
80 {
81 .ctl_name = NET_AX25_STANDARD_WINDOW,
82 .procname = "standard_window_size",
83 .maxlen = sizeof(int),
84 .mode = 0644,
85 .proc_handler = &proc_dointvec_minmax,
86 .strategy = &sysctl_intvec,
87 .extra1 = &min_window,
88 .extra2 = &max_window
89 },
90 {
91 .ctl_name = NET_AX25_EXTENDED_WINDOW,
92 .procname = "extended_window_size",
93 .maxlen = sizeof(int),
94 .mode = 0644,
95 .proc_handler = &proc_dointvec_minmax,
96 .strategy = &sysctl_intvec,
97 .extra1 = &min_ewindow,
98 .extra2 = &max_ewindow
99 },
100 {
101 .ctl_name = NET_AX25_T1_TIMEOUT,
102 .procname = "t1_timeout",
103 .maxlen = sizeof(int),
104 .mode = 0644,
105 .proc_handler = &proc_dointvec_minmax,
106 .strategy = &sysctl_intvec,
107 .extra1 = &min_t1,
108 .extra2 = &max_t1
109 },
110 {
111 .ctl_name = NET_AX25_T2_TIMEOUT,
112 .procname = "t2_timeout",
113 .maxlen = sizeof(int),
114 .mode = 0644,
115 .proc_handler = &proc_dointvec_minmax,
116 .strategy = &sysctl_intvec,
117 .extra1 = &min_t2,
118 .extra2 = &max_t2
119 },
120 {
121 .ctl_name = NET_AX25_T3_TIMEOUT,
122 .procname = "t3_timeout",
123 .maxlen = sizeof(int),
124 .mode = 0644,
125 .proc_handler = &proc_dointvec_minmax,
126 .strategy = &sysctl_intvec,
127 .extra1 = &min_t3,
128 .extra2 = &max_t3
129 },
130 {
131 .ctl_name = NET_AX25_IDLE_TIMEOUT,
132 .procname = "idle_timeout",
133 .maxlen = sizeof(int),
134 .mode = 0644,
135 .proc_handler = &proc_dointvec_minmax,
136 .strategy = &sysctl_intvec,
137 .extra1 = &min_idle,
138 .extra2 = &max_idle
139 },
140 {
141 .ctl_name = NET_AX25_N2,
142 .procname = "maximum_retry_count",
143 .maxlen = sizeof(int),
144 .mode = 0644,
145 .proc_handler = &proc_dointvec_minmax,
146 .strategy = &sysctl_intvec,
147 .extra1 = &min_n2,
148 .extra2 = &max_n2
149 },
150 {
151 .ctl_name = NET_AX25_PACLEN,
152 .procname = "maximum_packet_length",
153 .maxlen = sizeof(int),
154 .mode = 0644,
155 .proc_handler = &proc_dointvec_minmax,
156 .strategy = &sysctl_intvec,
157 .extra1 = &min_paclen,
158 .extra2 = &max_paclen
159 },
160 {
161 .ctl_name = NET_AX25_PROTOCOL,
162 .procname = "protocol",
163 .maxlen = sizeof(int),
164 .mode = 0644,
165 .proc_handler = &proc_dointvec_minmax,
166 .strategy = &sysctl_intvec,
167 .extra1 = &min_proto,
168 .extra2 = &max_proto
169 },
170 {
171 .ctl_name = NET_AX25_DAMA_SLAVE_TIMEOUT,
172 .procname = "dama_slave_timeout",
173 .maxlen = sizeof(int),
174 .mode = 0644,
175 .proc_handler = &proc_dointvec_minmax,
176 .strategy = &sysctl_intvec,
177 .extra1 = &min_ds_timeout,
178 .extra2 = &max_ds_timeout
179 },
180 { .ctl_name = 0 } /* that's all, folks! */
181 };
182
183 void ax25_register_sysctl(void)
184 {
185 ax25_dev *ax25_dev;
186 int n, k;
187
188 spin_lock_bh(&ax25_dev_lock);
189 for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
190 ax25_table_size += sizeof(ctl_table);
191
192 if ((ax25_table = kzalloc(ax25_table_size, GFP_ATOMIC)) == NULL) {
193 spin_unlock_bh(&ax25_dev_lock);
194 return;
195 }
196
197 for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) {
198 struct ctl_table *child = kmemdup(ax25_param_table,
199 sizeof(ax25_param_table),
200 GFP_ATOMIC);
201 if (!child) {
202 while (n--)
203 kfree(ax25_table[n].child);
204 kfree(ax25_table);
205 spin_unlock_bh(&ax25_dev_lock);
206 return;
207 }
208 ax25_table[n].child = ax25_dev->systable = child;
209 ax25_table[n].ctl_name = n + 1;
210 ax25_table[n].procname = ax25_dev->dev->name;
211 ax25_table[n].mode = 0555;
212
213 #ifndef CONFIG_AX25_DAMA_SLAVE
214 /*
215 * We do not wish to have a representation of this parameter
216 * in /proc/sys/ when configured *not* to include the
217 * AX.25 DAMA slave code, do we?
218 */
219
220 child[AX25_VALUES_DS_TIMEOUT].procname = NULL;
221 #endif
222
223 child[AX25_MAX_VALUES].ctl_name = 0; /* just in case... */
224
225 for (k = 0; k < AX25_MAX_VALUES; k++)
226 child[k].data = &ax25_dev->values[k];
227
228 n++;
229 }
230 spin_unlock_bh(&ax25_dev_lock);
231
232 ax25_table_header = register_sysctl_paths(ax25_path, ax25_table);
233 }
234
235 void ax25_unregister_sysctl(void)
236 {
237 ctl_table *p;
238 unregister_sysctl_table(ax25_table_header);
239
240 for (p = ax25_table; p->ctl_name; p++)
241 kfree(p->child);
242 kfree(ax25_table);
243 }
244
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