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Commit | Line | Data |
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cae681fc AK |
1 | /* Inject a hwpoison memory failure on a arbitary pfn */ |
2 | #include <linux/module.h> | |
3 | #include <linux/debugfs.h> | |
4 | #include <linux/kernel.h> | |
5 | #include <linux/mm.h> | |
6 | ||
7 | static struct dentry *hwpoison_dir, *corrupt_pfn; | |
8 | ||
9 | static int hwpoison_inject(void *data, u64 val) | |
10 | { | |
11 | if (!capable(CAP_SYS_ADMIN)) | |
12 | return -EPERM; | |
13 | printk(KERN_INFO "Injecting memory failure at pfn %Lx\n", val); | |
14 | return __memory_failure(val, 18, 0); | |
15 | } | |
16 | ||
17 | DEFINE_SIMPLE_ATTRIBUTE(hwpoison_fops, NULL, hwpoison_inject, "%lli\n"); | |
18 | ||
19 | static void pfn_inject_exit(void) | |
20 | { | |
21 | if (hwpoison_dir) | |
22 | debugfs_remove_recursive(hwpoison_dir); | |
23 | } | |
24 | ||
25 | static int pfn_inject_init(void) | |
26 | { | |
27 | hwpoison_dir = debugfs_create_dir("hwpoison", NULL); | |
28 | if (hwpoison_dir == NULL) | |
29 | return -ENOMEM; | |
30 | corrupt_pfn = debugfs_create_file("corrupt-pfn", 0600, hwpoison_dir, | |
31 | NULL, &hwpoison_fops); | |
32 | if (corrupt_pfn == NULL) { | |
33 | pfn_inject_exit(); | |
34 | return -ENOMEM; | |
35 | } | |
36 | return 0; | |
37 | } | |
38 | ||
39 | module_init(pfn_inject_init); | |
40 | module_exit(pfn_inject_exit); | |
41 | MODULE_LICENSE("GPL"); |