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Linux/lib/memory-notifier-error-inject.c

  1 #include <linux/kernel.h>
  2 #include <linux/module.h>
  3 #include <linux/memory.h>
  4 
  5 #include "notifier-error-inject.h"
  6 
  7 static int priority;
  8 module_param(priority, int, 0);
  9 MODULE_PARM_DESC(priority, "specify memory notifier priority");
 10 
 11 static 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 
 19 static struct dentry *dir;
 20 
 21 static 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 
 37 static void err_inject_exit(void)
 38 {
 39         unregister_memory_notifier(&memory_notifier_err_inject.nb);
 40         debugfs_remove_recursive(dir);
 41 }
 42 
 43 module_init(err_inject_init);
 44 module_exit(err_inject_exit);
 45 
 46 MODULE_DESCRIPTION("memory notifier error injection module");
 47 MODULE_LICENSE("GPL");
 48 MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
 49 

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