fs/cachefiles/error_inject.c

   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
  11 unsigned int cachefiles_error_injection_state;
  12
  13 static struct ctl_table_header *cachefiles_sysctl;
  14 static 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
  25 static struct ctl_table cachefiles_sysctls_root[] = {
  26         {
  27                 .procname       = "cachefiles",
  28                 .mode           = 0555,
  29                 .child          = cachefiles_sysctls,
  30         },
  31         {}
  32 };
  33
  34 int __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
  43 void cachefiles_unregister_error_injection(void)
  44 {
  45         unregister_sysctl_table(cachefiles_sysctl);
  46 }