cpu-notifier-error-inject.c 1.2 KB
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#include <linux/kernel.h>
#include <linux/module.h>
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#include <linux/cpu.h>
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#include "notifier-error-inject.h"
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static int priority;
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module_param(priority, int, 0);
MODULE_PARM_DESC(priority, "specify cpu notifier priority");

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static struct notifier_err_inject cpu_notifier_err_inject = {
	.actions = {
		{ NOTIFIER_ERR_INJECT_ACTION(CPU_UP_PREPARE) },
		{ NOTIFIER_ERR_INJECT_ACTION(CPU_UP_PREPARE_FROZEN) },
		{ NOTIFIER_ERR_INJECT_ACTION(CPU_DOWN_PREPARE) },
		{ NOTIFIER_ERR_INJECT_ACTION(CPU_DOWN_PREPARE_FROZEN) },
		{}
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	}
};

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static struct dentry *dir;

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static int err_inject_init(void)
{
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	int err;

	dir = notifier_err_inject_init("cpu", notifier_err_inject_dir,
					&cpu_notifier_err_inject, priority);
	if (IS_ERR(dir))
		return PTR_ERR(dir);

	err = register_hotcpu_notifier(&cpu_notifier_err_inject.nb);
	if (err)
		debugfs_remove_recursive(dir);
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	return err;
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}

static void err_inject_exit(void)
{
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	unregister_hotcpu_notifier(&cpu_notifier_err_inject.nb);
	debugfs_remove_recursive(dir);
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}

module_init(err_inject_init);
module_exit(err_inject_exit);

MODULE_DESCRIPTION("CPU notifier error injection module");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
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