40 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2#include <linux/fault-inject.h>3#include <linux/fault-inject-usercopy.h>4 5static struct {6 struct fault_attr attr;7} fail_usercopy = {8 .attr = FAULT_ATTR_INITIALIZER,9};10 11static int __init setup_fail_usercopy(char *str)12{13 return setup_fault_attr(&fail_usercopy.attr, str);14}15__setup("fail_usercopy=", setup_fail_usercopy);16 17#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS18 19static int __init fail_usercopy_debugfs(void)20{21 struct dentry *dir;22 23 dir = fault_create_debugfs_attr("fail_usercopy", NULL,24 &fail_usercopy.attr);25 if (IS_ERR(dir))26 return PTR_ERR(dir);27 28 return 0;29}30 31late_initcall(fail_usercopy_debugfs);32 33#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */34 35bool should_fail_usercopy(void)36{37 return should_fail(&fail_usercopy.attr, 1);38}39EXPORT_SYMBOL_GPL(should_fail_usercopy);40