1 // SPDX-License-Identifier: GPL-2.0+
39 	while (offset <= len - sizeof(*node) &&  in validate_device_path()
40 	       node->length >= sizeof(*node) &&  in validate_device_path()
41 		node->length <= len - offset) {  in validate_device_path()
42 		offset += node->length;  in validate_device_path()
44 		if ((node->type == EFI_DEV_END_PATH ||  in validate_device_path()
45 		     node->type == EFI_DEV_END_PATH2) &&  in validate_device_path()
46 		    node->sub_type == EFI_DEV_END_ENTIRE)  in validate_device_path()
53 	 * If we're here then either node->length pointed past the end  in validate_device_path()
64 	/* An array of 16-bit integers */  in validate_boot_order()
101 	desclength = ucs2_strsize((efi_char16_t *)(buffer + 6), len - 6) + 2;  in validate_load_option()
126 	/* A single 16-bit integer */  in validate_uint16()
191  * @var_name: an array of @len non-NUL characters.
192  * @match_name: a NUL-terminated pattern string, optionally ending in "*". A
195  * @match: on output, the number of non-wildcard characters in @match_name
217 			 * We've reached a non-wildcard char in @match_name.  in variable_matches()
300 		strsize2 = ucs2_strsize(entry->var.VariableName, EFI_VAR_NAME_LEN);  in variable_is_present()
302 			!memcmp(variable_name, &(entry->var.VariableName),  in variable_is_present()
304 			!efi_guidcmp(entry->var.VendorGuid,  in variable_is_present()
325 	 * The variable name is, by definition, a NULL-terminated  in var_name_strnsize()
330 		c = variable_name[(len / sizeof(c)) - 1];  in var_name_strnsize()
340  * disable the sysfs workqueue since the firmware is buggy.
355 	printk(KERN_WARNING "efivars: duplicate variable: %s-%pUl\n",  in dup_variable_bug()
361  * efivar_init - build the initial list of EFI variables
363  * @data: function-specific data to pass to @func
364  * @head: initialised head of variable list
366  * Get every EFI variable from the firmware and invoke @func. @func
384 		return -ENOMEM;  in efivar_init()
410 			 * Some firmware implementations return the  in efivar_init()
430 			err = -EOPNOTSUPP;  in efivar_init()
456  * efivar_entry_add - add entry to variable list
469 	list_add(&entry->list, head);  in efivar_entry_add()
476  * __efivar_entry_add - add entry to variable list
482 	list_add(&entry->list, head);  in __efivar_entry_add()
486  * efivar_entry_remove - remove entry from variable list
493 	list_del(&entry->list);  in efivar_entry_remove()
497  * efivar_entry_list_del_unlock - remove entry from variable list
502  * NOTE: slightly weird locking semantics here - we expect to be
509 	list_del(&entry->list);  in efivar_entry_list_del_unlock()
514  * efivar_entry_delete - delete variable and remove entry from list
517  * Delete the variable from the firmware and remove @entry from the
521  * Returns 0 on success, -EINTR if we can't grab the semaphore,
533 	status = efivar_set_variable_locked(entry->var.VariableName,  in efivar_entry_delete()
534 					    &entry->var.VendorGuid,  in efivar_entry_delete()
546  * efivar_entry_size - obtain the size of a variable
561 	status = efivar_get_variable(entry->var.VariableName,  in efivar_entry_size()
562 				     &entry->var.VendorGuid, NULL, size, NULL);  in efivar_entry_size()
572  * __efivar_entry_get - call get_variable()
587 	status = efivar_get_variable(entry->var.VariableName,  in __efivar_entry_get()
588 				     &entry->var.VendorGuid,  in __efivar_entry_get()
595  * efivar_entry_get - call get_variable()
616  * efivar_entry_set_get_size - call set_variable() and get new size (atomic)
629  * Returns 0 on success, -EINVAL if the variable data is invalid,
630  * -ENOSPC if the firmware does not have enough available space, or a
640 	efi_char16_t *name = entry->var.VariableName;  in efivar_entry_set_get_size()
641 	efi_guid_t *vendor = &entry->var.VendorGuid;  in efivar_entry_set_get_size()
648 		return -EINVAL;  in efivar_entry_set_get_size()
675 	status = efivar_get_variable(entry->var.VariableName,  in efivar_entry_set_get_size()
676 				    &entry->var.VendorGuid,  in efivar_entry_set_get_size()
696  * efivar_entry_iter - iterate over variable list
699  * @data: function-specific data to pass to callback
706  *  - a non-zero return value indicates an error and terminates the loop
707  *  - @func is called from atomic context