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