116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/*-
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* Copyright (c) 2003 Poul-Henning Kamp
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* Copyright (c) 2013 iXsystems.com,
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* author: Alfred Perlstein <alfred@freebsd.org>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_WATCHDOG_H
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#define _SYS_WATCHDOG_H
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#include <sys/ioccom.h>
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#define _PATH_WATCHDOG "fido"
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#define WDIOCPATPAT _IOW('W', 42, u_int) /* pat the watchdog */
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#define WDIOC_SETTIMEOUT _IOW('W', 43, int) /* set/reset the timer */
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#define WDIOC_GETTIMEOUT _IOR('W', 44, int) /* get total timeout */
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#define WDIOC_GETTIMELEFT _IOR('W', 45, int) /* get time left */
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#define WDIOC_GETPRETIMEOUT _IOR('W', 46, int) /* get the pre-timeout */
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#define WDIOC_SETPRETIMEOUT _IOW('W', 47, int) /* set the pre-timeout */
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/* set the action when a pre-timeout occurs see: WD_SOFT_* */
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#define WDIOC_SETPRETIMEOUTACT _IOW('W', 48, int)
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/* use software watchdog instead of hardware */
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#define WDIOC_SETSOFT _IOW('W', 49, int)
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#define WDIOC_SETSOFTTIMEOUTACT _IOW('W', 50, int)
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#define WD_ACTIVE 0x8000000
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/*
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* Watchdog reset, timeout set to value in WD_INTERVAL field.
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* The kernel will arm the watchdog and unless the userland
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* program calls WDIOCPATPAT again before the timer expires
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* the system will reinitialize.
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*/
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#define WD_PASSIVE 0x0400000
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/*
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* Set the watchdog in passive mode.
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* The kernel will chose an appropriate timeout duration and
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* periodically reset the timer provided everything looks all
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* right to the kernel.
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*/
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#define WD_LASTVAL 0x0200000
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/*
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* Use the already last used timeout value.
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* The kernel will use as timeout the last valid timeout provided.
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*/
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#define WD_INTERVAL 0x00000ff
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/*
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* Mask for duration bits.
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* The watchdog will have a nominal patience of 2^N * nanoseconds.
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* Example: N == 30 gives a patience of 2^30 nanoseconds ~= 1 second.
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* NB: Expect variance in the +/- 10-20% range.
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*/
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/* Handy macros for humans not used to power of two nanoseconds */
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#define WD_TO_NEVER 0
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#define WD_TO_1MS 20
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#define WD_TO_125MS 27
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#define WD_TO_250MS 28
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#define WD_TO_500MS 29
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#define WD_TO_1SEC 30
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#define WD_TO_2SEC 31
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#define WD_TO_4SEC 32
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#define WD_TO_8SEC 33
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#define WD_TO_16SEC 34
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#define WD_TO_32SEC 35
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#define WD_TO_64SEC 36
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#define WD_TO_128SEC 37
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/* action on pre-timeout trigger */
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#define WD_SOFT_PANIC 0x01 /* panic */
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#define WD_SOFT_DDB 0x02 /* enter debugger */
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#define WD_SOFT_LOG 0x04 /* log(9) */
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#define WD_SOFT_PRINTF 0x08 /* printf(9) */
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#define WD_SOFT_MASK 0x0f /* all of the above */
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#ifdef _KERNEL
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#include <sys/eventhandler.h>
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typedef void (*watchdog_fn)(void *, u_int, int *);
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EVENTHANDLER_DECLARE(watchdog_list, watchdog_fn);
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u_int wdog_kern_last_timeout(void);
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int wdog_kern_pat(u_int utim);
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#endif
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#endif /* _SYS_WATCHDOG_H */
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