Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #include <linux/fault-inject.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <linux/fault-inject-usercopy.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) static struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 	struct fault_attr attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) } fail_usercopy = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	.attr = FAULT_ATTR_INITIALIZER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) static int __init setup_fail_usercopy(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	return setup_fault_attr(&fail_usercopy.attr, str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) __setup("fail_usercopy=", setup_fail_usercopy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static int __init fail_usercopy_debugfs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	struct dentry *dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	dir = fault_create_debugfs_attr("fail_usercopy", NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 					&fail_usercopy.attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	if (IS_ERR(dir))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		return PTR_ERR(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) late_initcall(fail_usercopy_debugfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) bool should_fail_usercopy(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	return should_fail(&fail_usercopy.attr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) EXPORT_SYMBOL_GPL(should_fail_usercopy);