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 int __init cachefiles_register_error_injection(void) 26 { 27 cachefiles_sysctl = register_sysctl("cachefiles", cachefiles_sysctls); 28 if (!cachefiles_sysctl) 29 return -ENOMEM; 30 return 0; 31 32 } 33 34 void cachefiles_unregister_error_injection(void) 35 { 36 unregister_sysctl_table(cachefiles_sysctl); 37 } 38