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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
9579f5bd AM |
2 | #include <linux/kernel.h> |
3 | #include <linux/module.h> | |
4 | #include <linux/memory.h> | |
5 | ||
6 | #include "notifier-error-inject.h" | |
7 | ||
8 | static int priority; | |
9 | module_param(priority, int, 0); | |
10 | MODULE_PARM_DESC(priority, "specify memory notifier priority"); | |
11 | ||
12 | static struct notifier_err_inject memory_notifier_err_inject = { | |
13 | .actions = { | |
14 | { NOTIFIER_ERR_INJECT_ACTION(MEM_GOING_ONLINE) }, | |
15 | { NOTIFIER_ERR_INJECT_ACTION(MEM_GOING_OFFLINE) }, | |
16 | {} | |
17 | } | |
18 | }; | |
19 | ||
20 | static struct dentry *dir; | |
21 | ||
22 | static int err_inject_init(void) | |
23 | { | |
24 | int err; | |
25 | ||
26 | dir = notifier_err_inject_init("memory", notifier_err_inject_dir, | |
27 | &memory_notifier_err_inject, priority); | |
28 | if (IS_ERR(dir)) | |
29 | return PTR_ERR(dir); | |
30 | ||
31 | err = register_memory_notifier(&memory_notifier_err_inject.nb); | |
32 | if (err) | |
33 | debugfs_remove_recursive(dir); | |
34 | ||
35 | return err; | |
36 | } | |
37 | ||
38 | static void err_inject_exit(void) | |
39 | { | |
40 | unregister_memory_notifier(&memory_notifier_err_inject.nb); | |
41 | debugfs_remove_recursive(dir); | |
42 | } | |
43 | ||
44 | module_init(err_inject_init); | |
45 | module_exit(err_inject_exit); | |
46 | ||
47 | MODULE_DESCRIPTION("memory notifier error injection module"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | MODULE_AUTHOR("Akinobu Mita <[email protected]>"); |