1// SPDX-License-Identifier: GPL-2.0-or-later
 2/* Error injection handling.
 3 *
 4 * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
 5 * Written by David Howells (dhowells@redhat.com)
 6 */
 7
 8#include <linux/sysctl.h>
 9#include "internal.h"
10
11unsigned int cachefiles_error_injection_state;
12
13static struct ctl_table_header *cachefiles_sysctl;
14static struct ctl_table cachefiles_sysctls[] = {
15	{
16		.procname	= "error_injection",
17		.data		= &cachefiles_error_injection_state,
18		.maxlen		= sizeof(unsigned int),
19		.mode		= 0644,
20		.proc_handler	= proc_douintvec,
21	},
22	{}
23};
24
25static struct ctl_table cachefiles_sysctls_root[] = {
26	{
27		.procname	= "cachefiles",
28		.mode		= 0555,
29		.child		= cachefiles_sysctls,
30	},
31	{}
32};
33
34int __init cachefiles_register_error_injection(void)
35{
36	cachefiles_sysctl = register_sysctl_table(cachefiles_sysctls_root);
37	if (!cachefiles_sysctl)
38		return -ENOMEM;
39	return 0;
40
41}
42
43void cachefiles_unregister_error_injection(void)
44{
45	unregister_sysctl_table(cachefiles_sysctl);
46}