Release 4.8 drivers/watchdog/softdog.c
/*
* SoftDog: A Software Watchdog Device
*
* (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>,
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
* warranty for any of this software. This material is provided
* "AS-IS" and at no charge.
*
* (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
*
* Software only watchdog driver. Unlike its big brother the WDT501P
* driver this won't always recover a failed machine.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/reboot.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/watchdog.h>
#define TIMER_MARGIN 60
/* Default is 60 seconds */
static unsigned int soft_margin = TIMER_MARGIN;
/* in seconds */
module_param(soft_margin, uint, 0);
MODULE_PARM_DESC(soft_margin,
"Watchdog soft_margin in seconds. (0 < soft_margin < 65536, default="
__MODULE_STRING(TIMER_MARGIN) ")");
static bool nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, bool, 0);
MODULE_PARM_DESC(nowayout,
"Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static int soft_noboot;
module_param(soft_noboot, int, 0);
MODULE_PARM_DESC(soft_noboot,
"Softdog action, set to 1 to ignore reboots, 0 to reboot (default=0)");
static int soft_panic;
module_param(soft_panic, int, 0);
MODULE_PARM_DESC(soft_panic,
"Softdog action, set to 1 to panic, 0 to reboot (default=0)");
static void softdog_fire(unsigned long data)
{
module_put(THIS_MODULE);
if (soft_noboot) {
pr_crit("Triggered - Reboot ignored\n");
} else if (soft_panic) {
pr_crit("Initiating panic\n");
panic("Software Watchdog Timer expired");
} else {
pr_crit("Initiating system reboot\n");
emergency_restart();
pr_crit("Reboot didn't ?????\n");
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 14 | 23.73% | 3 | 25.00% |
| anithra p janakiraman | anithra p janakiraman | 13 | 22.03% | 1 | 8.33% |
| joe perches | joe perches | 12 | 20.34% | 1 | 8.33% |
| dave jones | dave jones | 6 | 10.17% | 1 | 8.33% |
| li rongqing | li rongqing | 5 | 8.47% | 1 | 8.33% |
| wim van sebroeck | wim van sebroeck | 4 | 6.78% | 1 | 8.33% |
| wolfram sang | wolfram sang | 3 | 5.08% | 2 | 16.67% |
| eric w. biederman | eric w. biederman | 1 | 1.69% | 1 | 8.33% |
| andrew morton | andrew morton | 1 | 1.69% | 1 | 8.33% |
| Total | 59 | 100.00% | 12 | 100.00% |
static struct timer_list softdog_ticktock =
TIMER_INITIALIZER(softdog_fire, 0, 0);
static int softdog_ping(struct watchdog_device *w)
{
if (!mod_timer(&softdog_ticktock, jiffies + (w->timeout * HZ)))
__module_get(THIS_MODULE);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| wim van sebroeck | wim van sebroeck | 18 | 47.37% | 1 | 16.67% |
| li rongqing | li rongqing | 8 | 21.05% | 1 | 16.67% |
| alan cox | alan cox | 8 | 21.05% | 1 | 16.67% |
| pre-git | pre-git | 2 | 5.26% | 1 | 16.67% |
| wolfram sang | wolfram sang | 1 | 2.63% | 1 | 16.67% |
| dave jones | dave jones | 1 | 2.63% | 1 | 16.67% |
| Total | 38 | 100.00% | 6 | 100.00% |
static int softdog_stop(struct watchdog_device *w)
{
if (del_timer(&softdog_ticktock))
module_put(THIS_MODULE);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| wim van sebroeck | wim van sebroeck | 15 | 55.56% | 1 | 25.00% |
| li rongqing | li rongqing | 7 | 25.93% | 1 | 25.00% |
| alan cox | alan cox | 4 | 14.81% | 1 | 25.00% |
| wolfram sang | wolfram sang | 1 | 3.70% | 1 | 25.00% |
| Total | 27 | 100.00% | 4 | 100.00% |
static struct watchdog_info softdog_info = {
.identity = "Software Watchdog",
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
};
static struct watchdog_ops softdog_ops = {
.owner = THIS_MODULE,
.start = softdog_ping,
.stop = softdog_stop,
};
static struct watchdog_device softdog_dev = {
.info = &softdog_info,
.ops = &softdog_ops,
.min_timeout = 1,
.max_timeout = 65535,
.timeout = TIMER_MARGIN,
};
static int __init softdog_init(void)
{
int ret;
watchdog_init_timeout(&softdog_dev, soft_margin, NULL);
watchdog_set_nowayout(&softdog_dev, nowayout);
watchdog_stop_on_reboot(&softdog_dev);
ret = watchdog_register_device(&softdog_dev);
if (ret)
return ret;
pr_info("initialized. soft_noboot=%d soft_margin=%d sec soft_panic=%d (nowayout=%d)\n",
soft_noboot, softdog_dev.timeout, soft_panic, nowayout);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 31 | 44.93% | 4 | 33.33% |
| alan cox | alan cox | 13 | 18.84% | 1 | 8.33% |
| wolfram sang | wolfram sang | 11 | 15.94% | 2 | 16.67% |
| wim van sebroeck | wim van sebroeck | 6 | 8.70% | 1 | 8.33% |
| joe perches | joe perches | 2 | 2.90% | 1 | 8.33% |
| damien riegel | damien riegel | 2 | 2.90% | 1 | 8.33% |
| anithra p janakiraman | anithra p janakiraman | 2 | 2.90% | 1 | 8.33% |
| dave jones | dave jones | 2 | 2.90% | 1 | 8.33% |
| Total | 69 | 100.00% | 12 | 100.00% |
module_init(softdog_init);
static void __exit softdog_exit(void)
{
watchdog_unregister_device(&softdog_dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 12 | 80.00% | 3 | 60.00% |
| alan cox | alan cox | 2 | 13.33% | 1 | 20.00% |
| wolfram sang | wolfram sang | 1 | 6.67% | 1 | 20.00% |
| Total | 15 | 100.00% | 5 | 100.00% |
module_exit(softdog_exit);
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("Software Watchdog Device Driver");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 101 | 21.96% | 11 | 31.43% |
| wim van sebroeck | wim van sebroeck | 101 | 21.96% | 4 | 11.43% |
| alan cox | alan cox | 75 | 16.30% | 2 | 5.71% |
| wolfram sang | wolfram sang | 53 | 11.52% | 6 | 17.14% |
| anithra p janakiraman | anithra p janakiraman | 35 | 7.61% | 1 | 2.86% |
| dave jones | dave jones | 27 | 5.87% | 2 | 5.71% |
| joe perches | joe perches | 21 | 4.57% | 1 | 2.86% |
| li rongqing | li rongqing | 20 | 4.35% | 1 | 2.86% |
| andrew morton | andrew morton | 11 | 2.39% | 2 | 5.71% |
| art haas | art haas | 10 | 2.17% | 1 | 2.86% |
| tim schmielau | tim schmielau | 2 | 0.43% | 1 | 2.86% |
| damien riegel | damien riegel | 2 | 0.43% | 1 | 2.86% |
| andrey panin | andrey panin | 1 | 0.22% | 1 | 2.86% |
| eric w. biederman | eric w. biederman | 1 | 0.22% | 1 | 2.86% |
| Total | 460 | 100.00% | 35 | 100.00% |
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