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
  10 #if ! ENABLE_EFI
  11 #include <errno.h>
  12 #endif
  13 #include <stdbool.h>
  14 #include <stddef.h>
  15 #include <stdint.h>
  16
  17 #include "sd-id128.h"
  18
  19 #include "time-util.h"
  20
  21 #define EFI_VENDOR_LOADER SD_ID128_MAKE(4a,67,b0,82,0a,4c,41,cf,b6,c7,44,0b,29,bb,8c,4f)
  22 #define EFI_VENDOR_GLOBAL SD_ID128_MAKE(8b,e4,df,61,93,ca,11,d2,aa,0d,00,e0,98,03,2b,8c)
  23 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
  24 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
  25 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
  26
  27 #if ENABLE_EFI
  28
  29 bool is_efi_boot(void);
  30 bool is_efi_secure_boot(void);
  31 bool is_efi_secure_boot_setup_mode(void);
  32 int efi_reboot_to_firmware_supported(void);
  33 int efi_get_reboot_to_firmware(void);
  34 int efi_set_reboot_to_firmware(bool value);
  35
  36 int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size);
  37 int efi_set_variable(sd_id128_t vendor, const char *name, const void *value, size_t size);
  38 int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p);
  39
  40 int efi_get_boot_option(uint16_t nr, char **title, sd_id128_t *part_uuid, char **path, bool *active);
  41 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);
  42 int efi_remove_boot_option(uint16_t id);
  43 int efi_get_boot_order(uint16_t **order);
  44 int efi_set_boot_order(uint16_t *order, size_t n);
  45 int efi_get_boot_options(uint16_t **options);
  46
  47 int efi_loader_get_device_part_uuid(sd_id128_t *u);
  48 int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader);
  49
  50 #else
  51
  52 static inline bool is_efi_boot(void) {
  53         return false;
  54 }
  55
  56 static inline bool is_efi_secure_boot(void) {
  57         return false;
  58 }
  59
  60 static inline bool is_efi_secure_boot_setup_mode(void) {
  61         return false;
  62 }
  63
  64 static inline int efi_reboot_to_firmware_supported(void) {
  65         return -EOPNOTSUPP;
  66 }
  67
  68 static inline int efi_get_reboot_to_firmware(void) {
  69         return -EOPNOTSUPP;
  70 }
  71
  72 static inline int efi_set_reboot_to_firmware(bool value) {
  73         return -EOPNOTSUPP;
  74 }
  75
  76 static inline int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size) {
  77         return -EOPNOTSUPP;
  78 }
  79
  80 static inline int efi_set_variable(sd_id128_t vendor, const char *name, const void *value, size_t size) {
  81         return -EOPNOTSUPP;
  82 }
  83
  84 static inline int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p) {
  85         return -EOPNOTSUPP;
  86 }
  87
  88 static inline int efi_get_boot_option(uint16_t nr, char **title, sd_id128_t *part_uuid, char **path, bool *active) {
  89         return -EOPNOTSUPP;
  90 }
  91
  92 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) {
  93         return -EOPNOTSUPP;
  94 }
  95
  96 static inline int efi_remove_boot_option(uint16_t id) {
  97         return -EOPNOTSUPP;
  98 }
  99
 100 static inline int efi_get_boot_order(uint16_t **order) {
 101         return -EOPNOTSUPP;
 102 }
 103
 104 static inline int efi_set_boot_order(uint16_t *order, size_t n) {
 105         return -EOPNOTSUPP;
 106 }
 107
 108 static inline int efi_get_boot_options(uint16_t **options) {
 109         return -EOPNOTSUPP;
 110 }
 111
 112 static inline int efi_loader_get_device_part_uuid(sd_id128_t *u) {
 113         return -EOPNOTSUPP;
 114 }
 115
 116 static inline int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader) {
 117         return -EOPNOTSUPP;
 118 }
 119
 120 #endif
 121
 122 char *efi_tilt_backslashes(char *s);