the-tree/lib/fault-inject-usercopy.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 #include <linux/fault-inject.h>
0003 #include <linux/fault-inject-usercopy.h>
0004
0005 static struct {
0006     struct fault_attr attr;
0007 } fail_usercopy = {
0008     .attr = FAULT_ATTR_INITIALIZER,
0009 };
0010
0011 static int __init setup_fail_usercopy(char *str)
0012 {
0013     return setup_fault_attr(&fail_usercopy.attr, str);
0014 }
0015 __setup("fail_usercopy=", setup_fail_usercopy);
0016
0017 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
0018
0019 static int __init fail_usercopy_debugfs(void)
0020 {
0021     struct dentry *dir;
0022
0023     dir = fault_create_debugfs_attr("fail_usercopy", NULL,
0024                     &fail_usercopy.attr);
0025     if (IS_ERR(dir))
0026         return PTR_ERR(dir);
0027
0028     return 0;
0029 }
0030
0031 late_initcall(fail_usercopy_debugfs);
0032
0033 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
0034
0035 bool should_fail_usercopy(void)
0036 {
0037     return should_fail(&fail_usercopy.attr, 1);
0038 }
0039 EXPORT_SYMBOL_GPL(should_fail_usercopy);