d626b50b9d
Enable the hardclock-based watchdog previously conditional on the SW_WATCHDOG option whenever hardware watchdogs are not found, and watchdogd attempts to enable the watchdog. The SW_WATCHDOG option still causes the sofware watchdog to be enabled even if there is a hardware watchdog. This does not change the other software-based watchdog enabled by the --softtimeout option to watchdogd. Note that the code to reprime the watchdog during kernel core dumps is no longer conditional on SW_WATCHDOG. I think this was previously a bug. Reviewed by: imp alfred bjk MFC after: 1 week Relnotes: yes Differential Revision: https://reviews.freebsd.org/D13713
126 lines
4.2 KiB
C
126 lines
4.2 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2003 Poul-Henning Kamp
|
|
* Copyright (c) 2013 iXsystems.com,
|
|
* author: Alfred Perlstein <alfred@freebsd.org>
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#ifndef _SYS_WATCHDOG_H
|
|
#define _SYS_WATCHDOG_H
|
|
|
|
#include <sys/ioccom.h>
|
|
|
|
#define _PATH_WATCHDOG "fido"
|
|
|
|
#define WDIOCPATPAT _IOW('W', 42, u_int) /* pat the watchdog */
|
|
#define WDIOC_SETTIMEOUT _IOW('W', 43, int) /* set/reset the timer */
|
|
#define WDIOC_GETTIMEOUT _IOR('W', 44, int) /* get total timeout */
|
|
#define WDIOC_GETTIMELEFT _IOR('W', 45, int) /* get time left */
|
|
#define WDIOC_GETPRETIMEOUT _IOR('W', 46, int) /* get the pre-timeout */
|
|
#define WDIOC_SETPRETIMEOUT _IOW('W', 47, int) /* set the pre-timeout */
|
|
/* set the action when a pre-timeout occurs see: WD_SOFT_* */
|
|
#define WDIOC_SETPRETIMEOUTACT _IOW('W', 48, int)
|
|
|
|
/* use software watchdog instead of hardware */
|
|
#define WDIOC_SETSOFT _IOW('W', 49, int)
|
|
#define WDIOC_SETSOFTTIMEOUTACT _IOW('W', 50, int)
|
|
|
|
#define WD_ACTIVE 0x8000000
|
|
/*
|
|
* Watchdog reset, timeout set to value in WD_INTERVAL field.
|
|
* The kernel will arm the watchdog and unless the userland
|
|
* program calls WDIOCPATPAT again before the timer expires
|
|
* the system will reinitialize.
|
|
*/
|
|
|
|
#define WD_PASSIVE 0x0400000
|
|
/*
|
|
* Set the watchdog in passive mode.
|
|
* The kernel will chose an appropriate timeout duration and
|
|
* periodically reset the timer provided everything looks all
|
|
* right to the kernel.
|
|
*/
|
|
|
|
#define WD_LASTVAL 0x0200000
|
|
/*
|
|
* Use the already last used timeout value.
|
|
* The kernel will use as timeout the last valid timeout provided.
|
|
*/
|
|
|
|
#define WD_INTERVAL 0x00000ff
|
|
/*
|
|
* Mask for duration bits.
|
|
* The watchdog will have a nominal patience of 2^N * nanoseconds.
|
|
* Example: N == 30 gives a patience of 2^30 nanoseconds ~= 1 second.
|
|
* NB: Expect variance in the +/- 10-20% range.
|
|
*/
|
|
|
|
/* Handy macros for humans not used to power of two nanoseconds */
|
|
#define WD_TO_NEVER 0
|
|
#define WD_TO_1MS 20
|
|
#define WD_TO_125MS 27
|
|
#define WD_TO_250MS 28
|
|
#define WD_TO_500MS 29
|
|
#define WD_TO_1SEC 30
|
|
#define WD_TO_2SEC 31
|
|
#define WD_TO_4SEC 32
|
|
#define WD_TO_8SEC 33
|
|
#define WD_TO_16SEC 34
|
|
#define WD_TO_32SEC 35
|
|
#define WD_TO_64SEC 36
|
|
#define WD_TO_128SEC 37
|
|
|
|
/* action on pre-timeout trigger */
|
|
#define WD_SOFT_PANIC 0x01 /* panic */
|
|
#define WD_SOFT_DDB 0x02 /* enter debugger */
|
|
#define WD_SOFT_LOG 0x04 /* log(9) */
|
|
#define WD_SOFT_PRINTF 0x08 /* printf(9) */
|
|
#define WD_SOFT_MASK 0x0f /* all of the above */
|
|
|
|
#ifdef _KERNEL
|
|
|
|
#include <sys/eventhandler.h>
|
|
|
|
typedef void (*watchdog_fn)(void *, u_int, int *);
|
|
|
|
EVENTHANDLER_DECLARE(watchdog_list, watchdog_fn);
|
|
|
|
u_int wdog_kern_last_timeout(void);
|
|
int wdog_kern_pat(u_int utim);
|
|
|
|
/*
|
|
* The following function pointer is used to attach a software watchdog
|
|
* if no hardware watchdog has been attached, and if the software module
|
|
* has initialized the function pointer.
|
|
*/
|
|
|
|
extern void (*wdog_software_attach)(void);
|
|
#endif
|
|
|
|
#endif /* _SYS_WATCHDOG_H */
|