linux/lib/memory-notifier-error-inject.c
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   1#include <linux/kernel.h>
   2#include <linux/module.h>
   3#include <linux/memory.h>
   4
   5#include "notifier-error-inject.h"
   6
   7static int priority;
   8module_param(priority, int, 0);
   9MODULE_PARM_DESC(priority, "specify memory notifier priority");
  10
  11static struct notifier_err_inject memory_notifier_err_inject = {
  12        .actions = {
  13                { NOTIFIER_ERR_INJECT_ACTION(MEM_GOING_ONLINE) },
  14                { NOTIFIER_ERR_INJECT_ACTION(MEM_GOING_OFFLINE) },
  15                {}
  16        }
  17};
  18
  19static struct dentry *dir;
  20
  21static int err_inject_init(void)
  22{
  23        int err;
  24
  25        dir = notifier_err_inject_init("memory", notifier_err_inject_dir,
  26                                        &memory_notifier_err_inject, priority);
  27        if (IS_ERR(dir))
  28                return PTR_ERR(dir);
  29
  30        err = register_memory_notifier(&memory_notifier_err_inject.nb);
  31        if (err)
  32                debugfs_remove_recursive(dir);
  33
  34        return err;
  35}
  36
  37static void err_inject_exit(void)
  38{
  39        unregister_memory_notifier(&memory_notifier_err_inject.nb);
  40        debugfs_remove_recursive(dir);
  41}
  42
  43module_init(err_inject_init);
  44module_exit(err_inject_exit);
  45
  46MODULE_DESCRIPTION("memory notifier error injection module");
  47MODULE_LICENSE("GPL");
  48MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
  49
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