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[linux-2.6.git] / net / ax25 / sysctl_net_ax25.c
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
40 static const ctl_table ax25_param_table[] = {
41         {
42                 .ctl_name       = NET_AX25_IP_DEFAULT_MODE,
43                 .procname       = "ip_default_mode",
44                 .maxlen         = sizeof(int),
45                 .mode           = 0644,
46                 .proc_handler   = proc_dointvec_minmax,
47                 .strategy       = sysctl_intvec,
48                 .extra1         = &min_ipdefmode,
49                 .extra2         = &max_ipdefmode
50         },
51         {
52                 .ctl_name       = NET_AX25_DEFAULT_MODE,
53                 .procname       = "ax25_default_mode",
54                 .maxlen         = sizeof(int),
55                 .mode           = 0644,
56                 .proc_handler   = proc_dointvec_minmax,
57                 .strategy       = sysctl_intvec,
58                 .extra1         = &min_axdefmode,
59                 .extra2         = &max_axdefmode
60         },
61         {
62                 .ctl_name       = NET_AX25_BACKOFF_TYPE,
63                 .procname       = "backoff_type",
64                 .maxlen         = sizeof(int),
65                 .mode           = 0644,
66                 .proc_handler   = proc_dointvec_minmax,
67                 .strategy       = sysctl_intvec,
68                 .extra1         = &min_backoff,
69                 .extra2         = &max_backoff
70         },
71         {
72                 .ctl_name       = NET_AX25_CONNECT_MODE,
73                 .procname       = "connect_mode",
74                 .maxlen         = sizeof(int),
75                 .mode           = 0644,
76                 .proc_handler   = proc_dointvec_minmax,
77                 .strategy       = sysctl_intvec,
78                 .extra1         = &min_conmode,
79                 .extra2         = &max_conmode
80         },
81         {
82                 .ctl_name       = NET_AX25_STANDARD_WINDOW,
83                 .procname       = "standard_window_size",
84                 .maxlen         = sizeof(int),
85                 .mode           = 0644,
86                 .proc_handler   = proc_dointvec_minmax,
87                 .strategy       = sysctl_intvec,
88                 .extra1         = &min_window,
89                 .extra2         = &max_window
90         },
91         {
92                 .ctl_name       = NET_AX25_EXTENDED_WINDOW,
93                 .procname       = "extended_window_size",
94                 .maxlen         = sizeof(int),
95                 .mode           = 0644,
96                 .proc_handler   = proc_dointvec_minmax,
97                 .strategy       = sysctl_intvec,
98                 .extra1         = &min_ewindow,
99                 .extra2         = &max_ewindow
100         },
101         {
102                 .ctl_name       = NET_AX25_T1_TIMEOUT,
103                 .procname       = "t1_timeout",
104                 .maxlen         = sizeof(int),
105                 .mode           = 0644,
106                 .proc_handler   = proc_dointvec_minmax,
107                 .strategy       = sysctl_intvec,
108                 .extra1         = &min_t1,
109                 .extra2         = &max_t1
110         },
111         {
112                 .ctl_name       = NET_AX25_T2_TIMEOUT,
113                 .procname       = "t2_timeout",
114                 .maxlen         = sizeof(int),
115                 .mode           = 0644,
116                 .proc_handler   = proc_dointvec_minmax,
117                 .strategy       = sysctl_intvec,
118                 .extra1         = &min_t2,
119                 .extra2         = &max_t2
120         },
121         {
122                 .ctl_name       = NET_AX25_T3_TIMEOUT,
123                 .procname       = "t3_timeout",
124                 .maxlen         = sizeof(int),
125                 .mode           = 0644,
126                 .proc_handler   = proc_dointvec_minmax,
127                 .strategy       = sysctl_intvec,
128                 .extra1         = &min_t3,
129                 .extra2         = &max_t3
130         },
131         {
132                 .ctl_name       = NET_AX25_IDLE_TIMEOUT,
133                 .procname       = "idle_timeout",
134                 .maxlen         = sizeof(int),
135                 .mode           = 0644,
136                 .proc_handler   = proc_dointvec_minmax,
137                 .strategy       = sysctl_intvec,
138                 .extra1         = &min_idle,
139                 .extra2         = &max_idle
140         },
141         {
142                 .ctl_name       = NET_AX25_N2,
143                 .procname       = "maximum_retry_count",
144                 .maxlen         = sizeof(int),
145                 .mode           = 0644,
146                 .proc_handler   = proc_dointvec_minmax,
147                 .strategy       = sysctl_intvec,
148                 .extra1         = &min_n2,
149                 .extra2         = &max_n2
150         },
151         {
152                 .ctl_name       = NET_AX25_PACLEN,
153                 .procname       = "maximum_packet_length",
154                 .maxlen         = sizeof(int),
155                 .mode           = 0644,
156                 .proc_handler   = proc_dointvec_minmax,
157                 .strategy       = sysctl_intvec,
158                 .extra1         = &min_paclen,
159                 .extra2         = &max_paclen
160         },
161         {
162                 .ctl_name       = NET_AX25_PROTOCOL,
163                 .procname       = "protocol",
164                 .maxlen         = sizeof(int),
165                 .mode           = 0644,
166                 .proc_handler   = proc_dointvec_minmax,
167                 .strategy       = sysctl_intvec,
168                 .extra1         = &min_proto,
169                 .extra2         = &max_proto
170         },
171 #ifdef CONFIG_AX25_DAMA_SLAVE
172         {
173                 .ctl_name       = NET_AX25_DAMA_SLAVE_TIMEOUT,
174                 .procname       = "dama_slave_timeout",
175                 .maxlen         = sizeof(int),
176                 .mode           = 0644,
177                 .proc_handler   = proc_dointvec_minmax,
178                 .strategy       = sysctl_intvec,
179                 .extra1         = &min_ds_timeout,
180                 .extra2         = &max_ds_timeout
181         },
182 #endif
183
184         { .ctl_name = 0 }       /* that's all, folks! */
185 };
186
187 void ax25_register_sysctl(void)
188 {
189         ax25_dev *ax25_dev;
190         int n, k;
191
192         spin_lock_bh(&ax25_dev_lock);
193         for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
194                 ax25_table_size += sizeof(ctl_table);
195
196         if ((ax25_table = kzalloc(ax25_table_size, GFP_ATOMIC)) == NULL) {
197                 spin_unlock_bh(&ax25_dev_lock);
198                 return;
199         }
200
201         for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) {
202                 struct ctl_table *child = kmemdup(ax25_param_table,
203                                                   sizeof(ax25_param_table),
204                                                   GFP_ATOMIC);
205                 if (!child) {
206                         while (n--)
207                                 kfree(ax25_table[n].child);
208                         kfree(ax25_table);
209                         spin_unlock_bh(&ax25_dev_lock);
210                         return;
211                 }
212                 ax25_table[n].child = ax25_dev->systable = child;
213                 ax25_table[n].ctl_name     = n + 1;
214                 ax25_table[n].procname     = ax25_dev->dev->name;
215                 ax25_table[n].mode         = 0555;
216
217                 child[AX25_MAX_VALUES].ctl_name = 0;    /* just in case... */
218
219                 for (k = 0; k < AX25_MAX_VALUES; k++)
220                         child[k].data = &ax25_dev->values[k];
221
222                 n++;
223         }
224         spin_unlock_bh(&ax25_dev_lock);
225
226         ax25_table_header = register_sysctl_paths(ax25_path, ax25_table);
227 }
228
229 void ax25_unregister_sysctl(void)
230 {
231         ctl_table *p;
232         unregister_sysctl_table(ax25_table_header);
233
234         for (p = ax25_table; p->ctl_name; p++)
235                 kfree(p->child);
236         kfree(ax25_table);
237 }