FreeBSD/Linux Kernel Cross Reference
sys/sys/wdog.h
1 /*
2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Alex Hornung <ahornung@gmail.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34 #ifndef _SYS_WDOG_H_
35 #define _SYS_WDOG_H_
36
37 #include <sys/ioccom.h>
38
39 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
40
41 #ifndef _SYS_QUEUE_H_
42 #include <sys/queue.h>
43 #endif
44
45 typedef int (wdog_fn)(void *, int);
46
47 struct watchdog {
48 const char *name;
49 wdog_fn *wdog_fn;
50 void *arg;
51 int period_max;
52
53 /* Internal fields, don't touch! */
54 int period;
55 LIST_ENTRY(watchdog) link;
56 };
57 void wdog_register(struct watchdog *);
58 void wdog_unregister(struct watchdog *);
59 void wdog_disable(void);
60 #endif /* KERNEL */
61
62 #define WDIOCRESET _IOW('W', 42, u_int)
63 #define WDOG_DEFAULT_PERIOD 30 /* 30 seconds */
64
65 #endif /* _SYS_WDOG_H_ */
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