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