1 /*********************************************************************
2 *
3 * Filename: irsysctl.c
4 * Version: 1.0
5 * Description: Sysctl interface for IrDA
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
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 <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1997, 1999 Dag Brattli, All Rights Reserved.
13 * Copyright (c) 2000-2001 Jean Tourrilhes <jt@hpl.hp.com>
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(struct 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(struct 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 struct 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_FAST_RR
130 {
131 .procname = "fast_poll_increase",
132 .data = &sysctl_fast_poll_increase,
133 .maxlen = sizeof(int),
134 .mode = 0644,
135 .proc_handler = proc_dointvec
136 },
137 #endif
138 {
139 .procname = "discovery_slots",
140 .data = &sysctl_discovery_slots,
141 .maxlen = sizeof(int),
142 .mode = 0644,
143 .proc_handler = proc_dointvec_minmax,
144 .extra1 = &min_discovery_slots,
145 .extra2 = &max_discovery_slots
146 },
147 {
148 .procname = "discovery_timeout",
149 .data = &sysctl_discovery_timeout,
150 .maxlen = sizeof(int),
151 .mode = 0644,
152 .proc_handler = proc_dointvec
153 },
154 {
155 .procname = "slot_timeout",
156 .data = &sysctl_slot_timeout,
157 .maxlen = sizeof(int),
158 .mode = 0644,
159 .proc_handler = proc_dointvec_minmax,
160 .extra1 = &min_slot_timeout,
161 .extra2 = &max_slot_timeout
162 },
163 {
164 .procname = "max_baud_rate",
165 .data = &sysctl_max_baud_rate,
166 .maxlen = sizeof(int),
167 .mode = 0644,
168 .proc_handler = proc_dointvec_minmax,
169 .extra1 = &min_max_baud_rate,
170 .extra2 = &max_max_baud_rate
171 },
172 {
173 .procname = "min_tx_turn_time",
174 .data = &sysctl_min_tx_turn_time,
175 .maxlen = sizeof(int),
176 .mode = 0644,
177 .proc_handler = proc_dointvec_minmax,
178 .extra1 = &min_min_tx_turn_time,
179 .extra2 = &max_min_tx_turn_time
180 },
181 {
182 .procname = "max_tx_data_size",
183 .data = &sysctl_max_tx_data_size,
184 .maxlen = sizeof(int),
185 .mode = 0644,
186 .proc_handler = proc_dointvec_minmax,
187 .extra1 = &min_max_tx_data_size,
188 .extra2 = &max_max_tx_data_size
189 },
190 {
191 .procname = "max_tx_window",
192 .data = &sysctl_max_tx_window,
193 .maxlen = sizeof(int),
194 .mode = 0644,
195 .proc_handler = proc_dointvec_minmax,
196 .extra1 = &min_max_tx_window,
197 .extra2 = &max_max_tx_window
198 },
199 {
200 .procname = "max_noreply_time",
201 .data = &sysctl_max_noreply_time,
202 .maxlen = sizeof(int),
203 .mode = 0644,
204 .proc_handler = proc_dointvec_minmax,
205 .extra1 = &min_max_noreply_time,
206 .extra2 = &max_max_noreply_time
207 },
208 {
209 .procname = "warn_noreply_time",
210 .data = &sysctl_warn_noreply_time,
211 .maxlen = sizeof(int),
212 .mode = 0644,
213 .proc_handler = proc_dointvec_minmax,
214 .extra1 = &min_warn_noreply_time,
215 .extra2 = &max_warn_noreply_time
216 },
217 {
218 .procname = "lap_keepalive_time",
219 .data = &sysctl_lap_keepalive_time,
220 .maxlen = sizeof(int),
221 .mode = 0644,
222 .proc_handler = proc_dointvec_minmax,
223 .extra1 = &min_lap_keepalive_time,
224 .extra2 = &max_lap_keepalive_time
225 },
226 { }
227 };
228
229 static struct ctl_table_header *irda_table_header;
230
231 /*
232 * Function irda_sysctl_register (void)
233 *
234 * Register our sysctl interface
235 *
236 */
237 int __init irda_sysctl_register(void)
238 {
239 irda_table_header = register_net_sysctl(&init_net, "net/irda", irda_table);
240 if (!irda_table_header)
241 return -ENOMEM;
242
243 return 0;
244 }
245
246 /*
247 * Function irda_sysctl_unregister (void)
248 *
249 * Unregister our sysctl interface
250 *
251 */
252 void irda_sysctl_unregister(void)
253 {
254 unregister_net_sysctl_table(irda_table_header);
255 }
256
257
258
259
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