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irsysctl.c
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1 /*********************************************************************
2  *
3  * Filename: irsysctl.c
4  * Version: 1.0
5  * Description: Sysctl interface for IrDA
6  * Status: Experimental.
7  * Author: Dag Brattli <[email protected]>
8  * Created at: Sun May 24 22:12:06 1998
9  * Modified at: Fri Jun 4 02:50:15 1999
10  * Modified by: Dag Brattli <[email protected]>
11  *
12  * Copyright (c) 1997, 1999 Dag Brattli, All Rights Reserved.
13  * Copyright (c) 2000-2001 Jean Tourrilhes <[email protected]>
14  *
15  * This program is free software; you can redistribute it and/or
16  * modify it under the terms of the GNU General Public License as
17  * published by the Free Software Foundation; either version 2 of
18  * the License, or (at your option) any later version.
19  *
20  * Neither Dag Brattli nor University of Tromsø admit liability nor
21  * provide warranty for any of this software. This material is
22  * provided "AS-IS" and at no charge.
23  *
24  ********************************************************************/
25 
26 #include <linux/mm.h>
27 #include <linux/ctype.h>
28 #include <linux/sysctl.h>
29 #include <linux/init.h>
30 
31 #include <net/irda/irda.h> /* irda_debug */
32 #include <net/irda/irlmp.h>
33 #include <net/irda/timer.h>
34 #include <net/irda/irias_object.h>
35 
36 extern int sysctl_discovery;
37 extern int sysctl_discovery_slots;
38 extern int sysctl_discovery_timeout;
39 extern int sysctl_slot_timeout;
40 extern int sysctl_fast_poll_increase;
41 extern char sysctl_devname[];
42 extern int sysctl_max_baud_rate;
43 extern unsigned int sysctl_min_tx_turn_time;
44 extern unsigned int sysctl_max_tx_data_size;
45 extern unsigned int sysctl_max_tx_window;
46 extern int sysctl_max_noreply_time;
47 extern int sysctl_warn_noreply_time;
48 extern int sysctl_lap_keepalive_time;
49 
50 extern struct irlmp_cb *irlmp;
51 
52 /* this is needed for the proc_dointvec_minmax - Jean II */
53 static int max_discovery_slots = 16; /* ??? */
54 static int min_discovery_slots = 1;
55 /* IrLAP 6.13.2 says 25ms to 10+70ms - allow higher since some devices
56  * seems to require it. (from Dag's comment) */
57 static int max_slot_timeout = 160;
58 static int min_slot_timeout = 20;
59 static int max_max_baud_rate = 16000000; /* See qos.c - IrLAP spec */
60 static int min_max_baud_rate = 2400;
61 static int max_min_tx_turn_time = 10000; /* See qos.c - IrLAP spec */
62 static int min_min_tx_turn_time;
63 static int max_max_tx_data_size = 2048; /* See qos.c - IrLAP spec */
64 static int min_max_tx_data_size = 64;
65 static int max_max_tx_window = 7; /* See qos.c - IrLAP spec */
66 static int min_max_tx_window = 1;
67 static int max_max_noreply_time = 40; /* See qos.c - IrLAP spec */
68 static int min_max_noreply_time = 3;
69 static int max_warn_noreply_time = 3; /* 3s == standard */
70 static int min_warn_noreply_time = 1; /* 1s == min WD_TIMER */
71 static int max_lap_keepalive_time = 10000; /* 10s */
72 static int min_lap_keepalive_time = 100; /* 100us */
73 /* For other sysctl, I've no idea of the range. Maybe Dag could help
74  * us on that - Jean II */
75 
76 static int do_devname(ctl_table *table, int write,
77  void __user *buffer, size_t *lenp, loff_t *ppos)
78 {
79  int ret;
80 
81  ret = proc_dostring(table, write, buffer, lenp, ppos);
82  if (ret == 0 && write) {
83  struct ias_value *val;
84 
85  val = irias_new_string_value(sysctl_devname);
86  if (val)
87  irias_object_change_attribute("Device", "DeviceName", val);
88  }
89  return ret;
90 }
91 
92 
93 static int do_discovery(ctl_table *table, int write,
94  void __user *buffer, size_t *lenp, loff_t *ppos)
95 {
96  int ret;
97 
98  ret = proc_dointvec(table, write, buffer, lenp, ppos);
99  if (ret)
100  return ret;
101 
102  if (irlmp == NULL)
103  return -ENODEV;
104 
105  if (sysctl_discovery)
106  irlmp_start_discovery_timer(irlmp, sysctl_discovery_timeout*HZ);
107  else
108  del_timer_sync(&irlmp->discovery_timer);
109 
110  return ret;
111 }
112 
113 /* One file */
114 static ctl_table irda_table[] = {
115  {
116  .procname = "discovery",
117  .data = &sysctl_discovery,
118  .maxlen = sizeof(int),
119  .mode = 0644,
120  .proc_handler = do_discovery,
121  },
122  {
123  .procname = "devname",
124  .data = sysctl_devname,
125  .maxlen = 65,
126  .mode = 0644,
127  .proc_handler = do_devname,
128  },
129 #ifdef CONFIG_IRDA_DEBUG
130  {
131  .procname = "debug",
132  .data = &irda_debug,
133  .maxlen = sizeof(int),
134  .mode = 0644,
135  .proc_handler = proc_dointvec
136  },
137 #endif
138 #ifdef CONFIG_IRDA_FAST_RR
139  {
140  .procname = "fast_poll_increase",
141  .data = &sysctl_fast_poll_increase,
142  .maxlen = sizeof(int),
143  .mode = 0644,
144  .proc_handler = proc_dointvec
145  },
146 #endif
147  {
148  .procname = "discovery_slots",
149  .data = &sysctl_discovery_slots,
150  .maxlen = sizeof(int),
151  .mode = 0644,
152  .proc_handler = proc_dointvec_minmax,
153  .extra1 = &min_discovery_slots,
154  .extra2 = &max_discovery_slots
155  },
156  {
157  .procname = "discovery_timeout",
158  .data = &sysctl_discovery_timeout,
159  .maxlen = sizeof(int),
160  .mode = 0644,
161  .proc_handler = proc_dointvec
162  },
163  {
164  .procname = "slot_timeout",
165  .data = &sysctl_slot_timeout,
166  .maxlen = sizeof(int),
167  .mode = 0644,
168  .proc_handler = proc_dointvec_minmax,
169  .extra1 = &min_slot_timeout,
170  .extra2 = &max_slot_timeout
171  },
172  {
173  .procname = "max_baud_rate",
174  .data = &sysctl_max_baud_rate,
175  .maxlen = sizeof(int),
176  .mode = 0644,
177  .proc_handler = proc_dointvec_minmax,
178  .extra1 = &min_max_baud_rate,
179  .extra2 = &max_max_baud_rate
180  },
181  {
182  .procname = "min_tx_turn_time",
183  .data = &sysctl_min_tx_turn_time,
184  .maxlen = sizeof(int),
185  .mode = 0644,
186  .proc_handler = proc_dointvec_minmax,
187  .extra1 = &min_min_tx_turn_time,
188  .extra2 = &max_min_tx_turn_time
189  },
190  {
191  .procname = "max_tx_data_size",
192  .data = &sysctl_max_tx_data_size,
193  .maxlen = sizeof(int),
194  .mode = 0644,
195  .proc_handler = proc_dointvec_minmax,
196  .extra1 = &min_max_tx_data_size,
197  .extra2 = &max_max_tx_data_size
198  },
199  {
200  .procname = "max_tx_window",
201  .data = &sysctl_max_tx_window,
202  .maxlen = sizeof(int),
203  .mode = 0644,
204  .proc_handler = proc_dointvec_minmax,
205  .extra1 = &min_max_tx_window,
206  .extra2 = &max_max_tx_window
207  },
208  {
209  .procname = "max_noreply_time",
210  .data = &sysctl_max_noreply_time,
211  .maxlen = sizeof(int),
212  .mode = 0644,
213  .proc_handler = proc_dointvec_minmax,
214  .extra1 = &min_max_noreply_time,
215  .extra2 = &max_max_noreply_time
216  },
217  {
218  .procname = "warn_noreply_time",
219  .data = &sysctl_warn_noreply_time,
220  .maxlen = sizeof(int),
221  .mode = 0644,
222  .proc_handler = proc_dointvec_minmax,
223  .extra1 = &min_warn_noreply_time,
224  .extra2 = &max_warn_noreply_time
225  },
226  {
227  .procname = "lap_keepalive_time",
228  .data = &sysctl_lap_keepalive_time,
229  .maxlen = sizeof(int),
230  .mode = 0644,
231  .proc_handler = proc_dointvec_minmax,
232  .extra1 = &min_lap_keepalive_time,
233  .extra2 = &max_lap_keepalive_time
234  },
235  { }
236 };
237 
238 static struct ctl_table_header *irda_table_header;
239 
240 /*
241  * Function irda_sysctl_register (void)
242  *
243  * Register our sysctl interface
244  *
245  */
246 int __init irda_sysctl_register(void)
247 {
248  irda_table_header = register_net_sysctl(&init_net, "net/irda", irda_table);
249  if (!irda_table_header)
250  return -ENOMEM;
251 
252  return 0;
253 }
254 
255 /*
256  * Function irda_sysctl_unregister (void)
257  *
258  * Unregister our sysctl interface
259  *
260  */
261 void irda_sysctl_unregister(void)
262 {
263  unregister_net_sysctl_table(irda_table_header);
264 }
265 
266 
267 
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