fault-inject-usercopy.c 823 B

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