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 Troms� 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/irias_object.h>
33
34#define NET_IRDA 412 /* Random number */
35enum { DISCOVERY=1, DEVNAME, DEBUG, FAST_POLL, DISCOVERY_SLOTS,
36       DISCOVERY_TIMEOUT, SLOT_TIMEOUT, MAX_BAUD_RATE, MIN_TX_TURN_TIME,
37       MAX_TX_DATA_SIZE, MAX_TX_WINDOW, MAX_NOREPLY_TIME, WARN_NOREPLY_TIME,
38       LAP_KEEPALIVE_TIME };
39
40extern int  sysctl_discovery;
41extern int  sysctl_discovery_slots;
42extern int  sysctl_discovery_timeout;
43extern int  sysctl_slot_timeout;
44extern int  sysctl_fast_poll_increase;
45extern char sysctl_devname[];
46extern int  sysctl_max_baud_rate;
47extern int  sysctl_min_tx_turn_time;
48extern int  sysctl_max_tx_data_size;
49extern int  sysctl_max_tx_window;
50extern int  sysctl_max_noreply_time;
51extern int  sysctl_warn_noreply_time;
52extern int  sysctl_lap_keepalive_time;
53
54/* this is needed for the proc_dointvec_minmax - Jean II */
55static int max_discovery_slots = 16;		/* ??? */
56static int min_discovery_slots = 1;
57/* IrLAP 6.13.2 says 25ms to 10+70ms - allow higher since some devices
58 * seems to require it. (from Dag's comment) */
59static int max_slot_timeout = 160;
60static int min_slot_timeout = 20;
61static int max_max_baud_rate = 16000000;	/* See qos.c - IrLAP spec */
62static int min_max_baud_rate = 2400;
63static int max_min_tx_turn_time = 10000;	/* See qos.c - IrLAP spec */
64static int min_min_tx_turn_time;
65static int max_max_tx_data_size = 2048;		/* See qos.c - IrLAP spec */
66static int min_max_tx_data_size = 64;
67static int max_max_tx_window = 7;		/* See qos.c - IrLAP spec */
68static int min_max_tx_window = 1;
69static int max_max_noreply_time = 40;		/* See qos.c - IrLAP spec */
70static int min_max_noreply_time = 3;
71static int max_warn_noreply_time = 3;		/* 3s == standard */
72static int min_warn_noreply_time = 1;		/* 1s == min WD_TIMER */
73static int max_lap_keepalive_time = 10000;	/* 10s */
74static int min_lap_keepalive_time = 100;	/* 100us */
75/* For other sysctl, I've no idea of the range. Maybe Dag could help
76 * us on that - Jean II */
77
78static int do_devname(ctl_table *table, int write, struct file *filp,
79		      void __user *buffer, size_t *lenp, loff_t *ppos)
80{
81	int ret;
82
83	ret = proc_dostring(table, write, filp, buffer, lenp, ppos);
84	if (ret == 0 && write) {
85		struct ias_value *val;
86
87		val = irias_new_string_value(sysctl_devname);
88		if (val)
89			irias_object_change_attribute("Device", "DeviceName", val);
90	}
91	return ret;
92}
93
94/* One file */
95static ctl_table irda_table[] = {
96	{
97		.ctl_name	= DISCOVERY,
98		.procname	= "discovery",
99		.data		= &sysctl_discovery,
100		.maxlen		= sizeof(int),
101		.mode		= 0644,
102		.proc_handler	= &proc_dointvec
103	},
104	{
105		.ctl_name	= DEVNAME,
106		.procname	= "devname",
107		.data		= sysctl_devname,
108		.maxlen		= 65,
109		.mode		= 0644,
110		.proc_handler	= &do_devname,
111		.strategy	= &sysctl_string
112	},
113#ifdef CONFIG_IRDA_DEBUG
114	{
115		.ctl_name	= DEBUG,
116		.procname	= "debug",
117		.data		= &irda_debug,
118		.maxlen		= sizeof(int),
119		.mode		= 0644,
120		.proc_handler	= &proc_dointvec
121	},
122#endif
123#ifdef CONFIG_IRDA_FAST_RR
124	{
125		.ctl_name	= FAST_POLL,
126		.procname	= "fast_poll_increase",
127		.data		= &sysctl_fast_poll_increase,
128		.maxlen		= sizeof(int),
129		.mode		= 0644,
130		.proc_handler	= &proc_dointvec
131	},
132#endif
133	{
134		.ctl_name	= DISCOVERY_SLOTS,
135		.procname	= "discovery_slots",
136		.data		= &sysctl_discovery_slots,
137		.maxlen		= sizeof(int),
138		.mode		= 0644,
139		.proc_handler	= &proc_dointvec_minmax,
140		.strategy	= &sysctl_intvec,
141		.extra1		= &min_discovery_slots,
142		.extra2		= &max_discovery_slots
143	},
144	{
145		.ctl_name	= DISCOVERY_TIMEOUT,
146		.procname	= "discovery_timeout",
147		.data		= &sysctl_discovery_timeout,
148		.maxlen		= sizeof(int),
149		.mode		= 0644,
150		.proc_handler	= &proc_dointvec
151	},
152	{
153		.ctl_name	= SLOT_TIMEOUT,
154		.procname	= "slot_timeout",
155		.data		= &sysctl_slot_timeout,
156		.maxlen		= sizeof(int),
157		.mode		= 0644,
158		.proc_handler	= &proc_dointvec_minmax,
159		.strategy	= &sysctl_intvec,
160		.extra1		= &min_slot_timeout,
161		.extra2		= &max_slot_timeout
162	},
163	{
164		.ctl_name	= MAX_BAUD_RATE,
165		.procname	= "max_baud_rate",
166		.data		= &sysctl_max_baud_rate,
167		.maxlen		= sizeof(int),
168		.mode		= 0644,
169		.proc_handler	= &proc_dointvec_minmax,
170		.strategy	= &sysctl_intvec,
171		.extra1		= &min_max_baud_rate,
172		.extra2		= &max_max_baud_rate
173	},
174	{
175		.ctl_name	= MIN_TX_TURN_TIME,
176		.procname	= "min_tx_turn_time",
177		.data		= &sysctl_min_tx_turn_time,
178		.maxlen		= sizeof(int),
179		.mode		= 0644,
180		.proc_handler	= &proc_dointvec_minmax,
181		.strategy	= &sysctl_intvec,
182		.extra1		= &min_min_tx_turn_time,
183		.extra2		= &max_min_tx_turn_time
184	},
185	{
186		.ctl_name	= MAX_TX_DATA_SIZE,
187		.procname	= "max_tx_data_size",
188		.data		= &sysctl_max_tx_data_size,
189		.maxlen		= sizeof(int),
190		.mode		= 0644,
191		.proc_handler	= &proc_dointvec_minmax,
192		.strategy	= &sysctl_intvec,
193		.extra1		= &min_max_tx_data_size,
194		.extra2		= &max_max_tx_data_size
195	},
196	{
197		.ctl_name	= MAX_TX_WINDOW,
198		.procname	= "max_tx_window",
199		.data		= &sysctl_max_tx_window,
200		.maxlen		= sizeof(int),
201		.mode		= 0644,
202		.proc_handler	= &proc_dointvec_minmax,
203		.strategy	= &sysctl_intvec,
204		.extra1		= &min_max_tx_window,
205		.extra2		= &max_max_tx_window
206	},
207	{
208		.ctl_name	= MAX_NOREPLY_TIME,
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		.strategy	= &sysctl_intvec,
215		.extra1		= &min_max_noreply_time,
216		.extra2		= &max_max_noreply_time
217	},
218	{
219		.ctl_name	= WARN_NOREPLY_TIME,
220		.procname	= "warn_noreply_time",
221		.data		= &sysctl_warn_noreply_time,
222		.maxlen		= sizeof(int),
223		.mode		= 0644,
224		.proc_handler	= &proc_dointvec_minmax,
225		.strategy	= &sysctl_intvec,
226		.extra1		= &min_warn_noreply_time,
227		.extra2		= &max_warn_noreply_time
228	},
229	{
230		.ctl_name	= LAP_KEEPALIVE_TIME,
231		.procname	= "lap_keepalive_time",
232		.data		= &sysctl_lap_keepalive_time,
233		.maxlen		= sizeof(int),
234		.mode		= 0644,
235		.proc_handler	= &proc_dointvec_minmax,
236		.strategy	= &sysctl_intvec,
237		.extra1		= &min_lap_keepalive_time,
238		.extra2		= &max_lap_keepalive_time
239	},
240	{ .ctl_name = 0 }
241};
242
243/* One directory */
244static ctl_table irda_net_table[] = {
245	{
246		.ctl_name	= NET_IRDA,
247		.procname	= "irda",
248		.maxlen		= 0,
249		.mode		= 0555,
250		.child		= irda_table
251	},
252	{ .ctl_name = 0 }
253};
254
255/* The parent directory */
256static ctl_table irda_root_table[] = {
257	{
258		.ctl_name	= CTL_NET,
259		.procname	= "net",
260		.maxlen		= 0,
261		.mode		= 0555,
262		.child		= irda_net_table
263	},
264	{ .ctl_name = 0 }
265};
266
267static struct ctl_table_header *irda_table_header;
268
269/*
270 * Function irda_sysctl_register (void)
271 *
272 *    Register our sysctl interface
273 *
274 */
275int __init irda_sysctl_register(void)
276{
277	irda_table_header = register_sysctl_table(irda_root_table);
278	if (!irda_table_header)
279		return -ENOMEM;
280
281	return 0;
282}
283
284/*
285 * Function irda_sysctl_unregister (void)
286 *
287 *    Unregister our sysctl interface
288 *
289 */
290void __exit irda_sysctl_unregister(void)
291{
292	unregister_sysctl_table(irda_table_header);
293}
294