src/shared/efivars.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2013 Lennart Poettering
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU Lesser General Public License as published by
  11   the Free Software Foundation; either version 2.1 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <stdbool.h>
  24 #include <stddef.h>
  25 #include <stdint.h>
  26
  27 #include "sd-id128.h"
  28
  29 #include "time-util.h"
  30
  31 #define EFI_VENDOR_LOADER SD_ID128_MAKE(4a,67,b0,82,0a,4c,41,cf,b6,c7,44,0b,29,bb,8c,4f)
  32 #define EFI_VENDOR_GLOBAL SD_ID128_MAKE(8b,e4,df,61,93,ca,11,d2,aa,0d,00,e0,98,03,2b,8c)
  33 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
  34 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
  35 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
  36
  37 #if ENABLE_EFI
  38
  39 bool is_efi_boot(void);
  40 bool is_efi_secure_boot(void);
  41 bool is_efi_secure_boot_setup_mode(void);
  42 int efi_reboot_to_firmware_supported(void);
  43 int efi_get_reboot_to_firmware(void);
  44 int efi_set_reboot_to_firmware(bool value);
  45
  46 int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size);
  47 int efi_set_variable(sd_id128_t vendor, const char *name, const void *value, size_t size);
  48 int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p);
  49
  50 int efi_get_boot_option(uint16_t nr, char **title, sd_id128_t *part_uuid, char **path, bool *active);
  51 int efi_add_boot_option(uint16_t id, const char *title, uint32_t part, uint64_t pstart, uint64_t psize, sd_id128_t part_uuid, const char *path);
  52 int efi_remove_boot_option(uint16_t id);
  53 int efi_get_boot_order(uint16_t **order);
  54 int efi_set_boot_order(uint16_t *order, size_t n);
  55 int efi_get_boot_options(uint16_t **options);
  56
  57 int efi_loader_get_device_part_uuid(sd_id128_t *u);
  58 int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader);
  59
  60 #else
  61
  62 static inline bool is_efi_boot(void) {
  63         return false;
  64 }
  65
  66 static inline bool is_efi_secure_boot(void) {
  67         return false;
  68 }
  69
  70 static inline bool is_efi_secure_boot_setup_mode(void) {
  71         return false;
  72 }
  73
  74 static inline int efi_reboot_to_firmware_supported(void) {
  75         return -EOPNOTSUPP;
  76 }
  77
  78 static inline int efi_get_reboot_to_firmware(void) {
  79         return -EOPNOTSUPP;
  80 }
  81
  82 static inline int efi_set_reboot_to_firmware(bool value) {
  83         return -EOPNOTSUPP;
  84 }
  85
  86 static inline int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size) {
  87         return -EOPNOTSUPP;
  88 }
  89
  90 static inline int efi_set_variable(sd_id128_t vendor, const char *name, const void *value, size_t size) {
  91         return -EOPNOTSUPP;
  92 }
  93
  94 static inline int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p) {
  95         return -EOPNOTSUPP;
  96 }
  97
  98 static inline int efi_get_boot_option(uint16_t nr, char **title, sd_id128_t *part_uuid, char **path, bool *active) {
  99         return -EOPNOTSUPP;
 100 }
 101
 102 static inline int efi_add_boot_option(uint16_t id, const char *title, uint32_t part, uint64_t pstart, uint64_t psize, sd_id128_t part_uuid, const char *path) {
 103         return -EOPNOTSUPP;
 104 }
 105
 106 static inline int efi_remove_boot_option(uint16_t id) {
 107         return -EOPNOTSUPP;
 108 }
 109
 110 static inline int efi_get_boot_order(uint16_t **order) {
 111         return -EOPNOTSUPP;
 112 }
 113
 114 static inline int efi_set_boot_order(uint16_t *order, size_t n) {
 115         return -EOPNOTSUPP;
 116 }
 117
 118 static inline int efi_get_boot_options(uint16_t **options) {
 119         return -EOPNOTSUPP;
 120 }
 121
 122 static inline int efi_loader_get_device_part_uuid(sd_id128_t *u) {
 123         return -EOPNOTSUPP;
 124 }
 125
 126 static inline int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader) {
 127         return -EOPNOTSUPP;
 128 }
 129
 130 #endif
 131
 132 char *efi_tilt_backslashes(char *s);