lib/fault-inject-usercopy.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 #include <linux/fault-inject.h>
   3 #include <linux/fault-inject-usercopy.h>
   4
   5 static struct {
   6         struct fault_attr attr;
   7 } fail_usercopy = {
   8         .attr = FAULT_ATTR_INITIALIZER,
   9 };
  10
  11 static 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_FS
  18
  19 static 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
  31 late_initcall(fail_usercopy_debugfs);
  32
  33 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
  34
  35 bool should_fail_usercopy(void)
  36 {
  37         return should_fail(&fail_usercopy.attr, 1);
  38 }
  39 EXPORT_SYMBOL_GPL(should_fail_usercopy);