src/shared/efivars.h

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