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()
91 	/* A valid entry must be at least 8 bytes */  in validate_load_option()
101 	desclength = ucs2_strsize((efi_char16_t *)(buffer + 6), len - 6) + 2;  in validate_load_option()
103 	/* Each boot entry must have a descriptor */  in validate_load_option()
126 	/* A single 16-bit integer */  in validate_uint16()
152 	char *name;  member
165  * Note that it's sorted by {vendor,name}, but globbed names must come after
166  * any other name with the same prefix.
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()
232 	char *name;  in efivar_get_utf8name()  local
234 	/* name, plus '-', plus GUID, plus NUL*/  in efivar_get_utf8name()
235 	name = kmalloc(len + 1 + EFI_VARIABLE_GUID_LEN + 1, GFP_KERNEL);  in efivar_get_utf8name()
236 	if (!name)  in efivar_get_utf8name()
239 	ucs2_as_utf8(name, name16, len);  in efivar_get_utf8name()
241 	name[len] = '-';  in efivar_get_utf8name()
243 	efi_guid_to_str(vendor, name + len + 1);  in efivar_get_utf8name()
245 	name[len + EFI_VARIABLE_GUID_LEN+1] = '\0';  in efivar_get_utf8name()
248 	strreplace(name, '/', '!');  in efivar_get_utf8name()
250 	return name;  in efivar_get_utf8name()
269 	for (i = 0; variable_validate[i].name[0] != '\0'; i++) {  in efivar_validate()
270 		const char *name = variable_validate[i].name;  in efivar_validate()  local
276 		if (variable_matches(utf8_name, utf8_size+1, name, &match)) {  in efivar_validate()
299 	for (i = 0; variable_validate[i].name[0] != '\0'; i++) {  in efivar_variable_is_removable()
304 				     variable_validate[i].name, &match)) {  in efivar_variable_is_removable()
328 	 * The variable name is, by definition, a NULL-terminated  in var_name_strnsize()
333 		c = variable_name[(len / sizeof(c)) - 1];  in var_name_strnsize()
358 	printk(KERN_WARNING "efivars: duplicate variable: %s-%pUl\n",  in dup_variable_bug()
364  * efivar_init - build the initial list of EFI variables
366  * @data: function-specific data to pass to @func
386 		return -ENOMEM;  in efivar_init()
413 			 * same variable name on multiple calls to  in efivar_init()
416 			 * we'll ever see a different variable name,  in efivar_init()
433 			err = -EOPNOTSUPP;  in efivar_init()
439 			pr_warn("efivars: Variable name size exceeds maximum (%lu > 512)\n",  in efivar_init()
459  * efivar_entry_delete - delete variable
460  * @entry: entry containing variable to delete
463  * responsibility to free @entry (by deleting the dentry/inode) once
466  * Returns 0 on success, -EINTR if we can't grab the semaphore,
469 int efivar_entry_delete(struct efivar_entry *entry)  in efivar_entry_delete()  argument
478 	status = efivar_set_variable_locked(entry->var.VariableName,  in efivar_entry_delete()
479 					    &entry->var.VendorGuid,  in efivar_entry_delete()
489  * efivar_entry_size - obtain the size of a variable
490  * @entry: entry for this variable
493 int efivar_entry_size(struct efivar_entry *entry, unsigned long *size)  in efivar_entry_size()  argument
504 	status = efivar_get_variable(entry->var.VariableName,  in efivar_entry_size()
505 				     &entry->var.VendorGuid, NULL, size, NULL);  in efivar_entry_size()
515  * __efivar_entry_get - call get_variable()
516  * @entry: read data for this variable
525 int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,  in __efivar_entry_get()  argument
530 	status = efivar_get_variable(entry->var.VariableName,  in __efivar_entry_get()
531 				     &entry->var.VendorGuid,  in __efivar_entry_get()
538  * efivar_entry_get - call get_variable()
539  * @entry: read data for this variable
544 int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,  in efivar_entry_get()  argument
552 	err = __efivar_entry_get(entry, attributes, size, data);  in efivar_entry_get()
559  * efivar_entry_set_get_size - call set_variable() and get new size (atomic)
560  * @entry: entry containing variable to set and get
568  * Atomically call set_variable() for @entry and if the call is
572  * Returns 0 on success, -EINVAL if the variable data is invalid,
573  * -ENOSPC if the firmware does not have enough available space, or a
580 int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,  in efivar_entry_set_get_size()  argument
583 	efi_char16_t *name = entry->var.VariableName;  in efivar_entry_set_get_size()  local
584 	efi_guid_t *vendor = &entry->var.VendorGuid;  in efivar_entry_set_get_size()
590 	if (efivar_validate(*vendor, name, data, *size) == false)  in efivar_entry_set_get_size()
591 		return -EINVAL;  in efivar_entry_set_get_size()
601 	status = efivar_set_variable_locked(name, vendor, attributes, *size,  in efivar_entry_set_get_size()
617 	status = efivar_get_variable(entry->var.VariableName,  in efivar_entry_set_get_size()
618 				    &entry->var.VendorGuid,  in efivar_entry_set_get_size()