ax25: fix warning in net/ax25/sysctl_net_ax25.c
[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 #ifdef CONFIG_AX25_DAMA_SLAVE
28 static int min_ds_timeout[1],           max_ds_timeout[] = {65535000};
29 #endif
30
31 static struct ctl_table_header *ax25_table_header;
32
33 static ctl_table *ax25_table;
34 static int ax25_table_size;
35
36 static struct ctl_path ax25_path[] = {
37         { .procname = "net", .ctl_name = CTL_NET, },
38         { .procname = "ax25", .ctl_name = NET_AX25, },
39         { }
40 };
41
42 static const ctl_table ax25_param_table[] = {
43         {
44                 .ctl_name       = NET_AX25_IP_DEFAULT_MODE,
45                 .procname       = "ip_default_mode",
46                 .maxlen         = sizeof(int),
47                 .mode           = 0644,
48                 .proc_handler   = proc_dointvec_minmax,
49                 .strategy       = sysctl_intvec,
50                 .extra1         = &min_ipdefmode,
51                 .extra2         = &max_ipdefmode
52         },
53         {
54                 .ctl_name       = NET_AX25_DEFAULT_MODE,
55                 .procname       = "ax25_default_mode",
56                 .maxlen         = sizeof(int),
57                 .mode           = 0644,
58                 .proc_handler   = proc_dointvec_minmax,
59                 .strategy       = sysctl_intvec,
60                 .extra1         = &min_axdefmode,
61                 .extra2         = &max_axdefmode
62         },
63         {
64                 .ctl_name       = NET_AX25_BACKOFF_TYPE,
65                 .procname       = "backoff_type",
66                 .maxlen         = sizeof(int),
67                 .mode           = 0644,
68                 .proc_handler   = proc_dointvec_minmax,
69                 .strategy       = sysctl_intvec,
70                 .extra1         = &min_backoff,
71                 .extra2         = &max_backoff
72         },
73         {
74                 .ctl_name       = NET_AX25_CONNECT_MODE,
75                 .procname       = "connect_mode",
76                 .maxlen         = sizeof(int),
77                 .mode           = 0644,
78                 .proc_handler   = proc_dointvec_minmax,
79                 .strategy       = sysctl_intvec,
80                 .extra1         = &min_conmode,
81                 .extra2         = &max_conmode
82         },
83         {
84                 .ctl_name       = NET_AX25_STANDARD_WINDOW,
85                 .procname       = "standard_window_size",
86                 .maxlen         = sizeof(int),
87                 .mode           = 0644,
88                 .proc_handler   = proc_dointvec_minmax,
89                 .strategy       = sysctl_intvec,
90                 .extra1         = &min_window,
91                 .extra2         = &max_window
92         },
93         {
94                 .ctl_name       = NET_AX25_EXTENDED_WINDOW,
95                 .procname       = "extended_window_size",
96                 .maxlen         = sizeof(int),
97                 .mode           = 0644,
98                 .proc_handler   = proc_dointvec_minmax,
99                 .strategy       = sysctl_intvec,
100                 .extra1         = &min_ewindow,
101                 .extra2         = &max_ewindow
102         },
103         {
104                 .ctl_name       = NET_AX25_T1_TIMEOUT,
105                 .procname       = "t1_timeout",
106                 .maxlen         = sizeof(int),
107                 .mode           = 0644,
108                 .proc_handler   = proc_dointvec_minmax,
109                 .strategy       = sysctl_intvec,
110                 .extra1         = &min_t1,
111                 .extra2         = &max_t1
112         },
113         {
114                 .ctl_name       = NET_AX25_T2_TIMEOUT,
115                 .procname       = "t2_timeout",
116                 .maxlen         = sizeof(int),
117                 .mode           = 0644,
118                 .proc_handler   = proc_dointvec_minmax,
119                 .strategy       = sysctl_intvec,
120                 .extra1         = &min_t2,
121                 .extra2         = &max_t2
122         },
123         {
124                 .ctl_name       = NET_AX25_T3_TIMEOUT,
125                 .procname       = "t3_timeout",
126                 .maxlen         = sizeof(int),
127                 .mode           = 0644,
128                 .proc_handler   = proc_dointvec_minmax,
129                 .strategy       = sysctl_intvec,
130                 .extra1         = &min_t3,
131                 .extra2         = &max_t3
132         },
133         {
134                 .ctl_name       = NET_AX25_IDLE_TIMEOUT,
135                 .procname       = "idle_timeout",
136                 .maxlen         = sizeof(int),
137                 .mode           = 0644,
138                 .proc_handler   = proc_dointvec_minmax,
139                 .strategy       = sysctl_intvec,
140                 .extra1         = &min_idle,
141                 .extra2         = &max_idle
142         },
143         {
144                 .ctl_name       = NET_AX25_N2,
145                 .procname       = "maximum_retry_count",
146                 .maxlen         = sizeof(int),
147                 .mode           = 0644,
148                 .proc_handler   = proc_dointvec_minmax,
149                 .strategy       = sysctl_intvec,
150                 .extra1         = &min_n2,
151                 .extra2         = &max_n2
152         },
153         {
154                 .ctl_name       = NET_AX25_PACLEN,
155                 .procname       = "maximum_packet_length",
156                 .maxlen         = sizeof(int),
157                 .mode           = 0644,
158                 .proc_handler   = proc_dointvec_minmax,
159                 .strategy       = sysctl_intvec,
160                 .extra1         = &min_paclen,
161                 .extra2         = &max_paclen
162         },
163         {
164                 .ctl_name       = NET_AX25_PROTOCOL,
165                 .procname       = "protocol",
166                 .maxlen         = sizeof(int),
167                 .mode           = 0644,
168                 .proc_handler   = proc_dointvec_minmax,
169                 .strategy       = sysctl_intvec,
170                 .extra1         = &min_proto,
171                 .extra2         = &max_proto
172         },
173 #ifdef CONFIG_AX25_DAMA_SLAVE
174         {
175                 .ctl_name       = NET_AX25_DAMA_SLAVE_TIMEOUT,
176                 .procname       = "dama_slave_timeout",
177                 .maxlen         = sizeof(int),
178                 .mode           = 0644,
179                 .proc_handler   = proc_dointvec_minmax,
180                 .strategy       = sysctl_intvec,
181                 .extra1         = &min_ds_timeout,
182                 .extra2         = &max_ds_timeout
183         },
184 #endif
185
186         { .ctl_name = 0 }       /* that's all, folks! */
187 };
188
189 void ax25_register_sysctl(void)
190 {
191         ax25_dev *ax25_dev;
192         int n, k;
193
194         spin_lock_bh(&ax25_dev_lock);
195         for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
196                 ax25_table_size += sizeof(ctl_table);
197
198         if ((ax25_table = kzalloc(ax25_table_size, GFP_ATOMIC)) == NULL) {
199                 spin_unlock_bh(&ax25_dev_lock);
200                 return;
201         }
202
203         for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) {
204                 struct ctl_table *child = kmemdup(ax25_param_table,
205                                                   sizeof(ax25_param_table),
206                                                   GFP_ATOMIC);
207                 if (!child) {
208                         while (n--)
209                                 kfree(ax25_table[n].child);
210                         kfree(ax25_table);
211                         spin_unlock_bh(&ax25_dev_lock);
212                         return;
213                 }
214                 ax25_table[n].child = ax25_dev->systable = child;
215                 ax25_table[n].ctl_name     = n + 1;
216                 ax25_table[n].procname     = ax25_dev->dev->name;
217                 ax25_table[n].mode         = 0555;
218
219                 child[AX25_MAX_VALUES].ctl_name = 0;    /* just in case... */
220
221                 for (k = 0; k < AX25_MAX_VALUES; k++)
222                         child[k].data = &ax25_dev->values[k];
223
224                 n++;
225         }
226         spin_unlock_bh(&ax25_dev_lock);
227
228         ax25_table_header = register_sysctl_paths(ax25_path, ax25_table);
229 }
230
231 void ax25_unregister_sysctl(void)
232 {
233         ctl_table *p;
234         unregister_sysctl_table(ax25_table_header);
235
236         for (p = ax25_table; p->ctl_name; p++)
237                 kfree(p->child);
238         kfree(ax25_table);
239 }