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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
0bb2f0f1 ZJS |
2 | #pragma once |
3 | ||
4 | #if !ENABLE_EFI | |
5 | # include <errno.h> | |
6 | #endif | |
7 | #include <stdbool.h> | |
8 | #include <stddef.h> | |
9 | #include <stdint.h> | |
10 | ||
11 | #include "sd-id128.h" | |
12 | ||
c4964512 | 13 | #include "efivars-fundamental.h" |
0bb2f0f1 ZJS |
14 | #include "time-util.h" |
15 | ||
e6f055cb ZJS |
16 | #define EFI_VENDOR_LOADER SD_ID128_MAKE(4a,67,b0,82,0a,4c,41,cf,b6,c7,44,0b,29,bb,8c,4f) |
17 | #define EFI_VENDOR_LOADER_STR SD_ID128_MAKE_UUID_STR(4a,67,b0,82,0a,4c,41,cf,b6,c7,44,0b,29,bb,8c,4f) | |
18 | #define EFI_VENDOR_GLOBAL SD_ID128_MAKE(8b,e4,df,61,93,ca,11,d2,aa,0d,00,e0,98,03,2b,8c) | |
19 | #define EFI_VENDOR_GLOBAL_STR SD_ID128_MAKE_UUID_STR(8b,e4,df,61,93,ca,11,d2,aa,0d,00,e0,98,03,2b,8c) | |
20 | #define EFI_VENDOR_SYSTEMD SD_ID128_MAKE(8c,f2,64,4b,4b,0b,42,8f,93,87,6d,87,60,50,dc,67) | |
21 | #define EFI_VENDOR_SYSTEMD_STR SD_ID128_MAKE_UUID_STR(8c,f2,64,4b,4b,0b,42,8f,93,87,6d,87,60,50,dc,67) | |
8fc5c444 LP |
22 | |
23 | #define EFI_VARIABLE_NON_VOLATILE UINT32_C(0x00000001) | |
24 | #define EFI_VARIABLE_BOOTSERVICE_ACCESS UINT32_C(0x00000002) | |
25 | #define EFI_VARIABLE_RUNTIME_ACCESS UINT32_C(0x00000004) | |
0bb2f0f1 | 26 | |
e6f055cb ZJS |
27 | /* Note that the <lowercaseuuid>-<varname> naming scheme is an efivarfs convention, i.e. part of the Linux |
28 | * API file system implementation for EFI. EFI itself processes UIDS in binary form. | |
29 | */ | |
30 | ||
31 | #define EFI_VENDOR_VARIABLE_STR(vendor, name) name "-" vendor | |
32 | ||
33 | #define EFI_GLOBAL_VARIABLE_STR(name) EFI_VENDOR_VARIABLE_STR(EFI_VENDOR_GLOBAL_STR, name) | |
34 | #define EFI_LOADER_VARIABLE_STR(name) EFI_VENDOR_VARIABLE_STR(EFI_VENDOR_LOADER_STR, name) | |
35 | #define EFI_SYSTEMD_VARIABLE_STR(name) EFI_VENDOR_VARIABLE_STR(EFI_VENDOR_SYSTEMD_STR, name) | |
36 | ||
37 | #define EFI_GLOBAL_VARIABLE(name) EFI_GLOBAL_VARIABLE_STR(STRINGIFY(name)) | |
38 | #define EFI_LOADER_VARIABLE(name) EFI_LOADER_VARIABLE_STR(STRINGIFY(name)) | |
39 | #define EFI_SYSTEMD_VARIABLE(name) EFI_SYSTEMD_VARIABLE_STR(STRINGIFY(name)) | |
40 | ||
41 | #define EFIVAR_PATH(variable) "/sys/firmware/efi/efivars/" variable | |
42 | #define EFIVAR_CACHE_PATH(variable) "/run/systemd/efivars/" variable | |
43 | ||
0bb2f0f1 ZJS |
44 | #if ENABLE_EFI |
45 | ||
187513fd LP |
46 | int efi_get_variable(const char *variable, uint32_t *attribute, void **ret_value, size_t *ret_size); |
47 | int efi_get_variable_string(const char *variable, char **ret); | |
e6f055cb ZJS |
48 | int efi_set_variable(const char *variable, const void *value, size_t size); |
49 | int efi_set_variable_string(const char *variable, const char *p); | |
0bb2f0f1 | 50 | |
c7d26acc AP |
51 | bool is_efi_boot(void); |
52 | bool is_efi_secure_boot(void); | |
c4964512 | 53 | SecureBootMode efi_get_secure_boot_mode(void); |
c7d26acc | 54 | |
209b2592 | 55 | int cache_efi_options_variable(void); |
187513fd LP |
56 | int systemd_efi_options_variable(char **ret); |
57 | int systemd_efi_options_efivarfs_if_newer(char **ret); | |
53aa0d02 | 58 | |
0bb2f0f1 ZJS |
59 | #else |
60 | ||
e6f055cb | 61 | static inline int efi_get_variable(const char *variable, uint32_t *attribute, void **value, size_t *size) { |
0bb2f0f1 ZJS |
62 | return -EOPNOTSUPP; |
63 | } | |
64 | ||
187513fd | 65 | static inline int efi_get_variable_string(const char *variable, char **ret) { |
0bb2f0f1 ZJS |
66 | return -EOPNOTSUPP; |
67 | } | |
68 | ||
e6f055cb | 69 | static inline int efi_set_variable(const char *variable, const void *value, size_t size) { |
0bb2f0f1 ZJS |
70 | return -EOPNOTSUPP; |
71 | } | |
72 | ||
e6f055cb | 73 | static inline int efi_set_variable_string(const char *variable, const char *p) { |
0bb2f0f1 ZJS |
74 | return -EOPNOTSUPP; |
75 | } | |
76 | ||
c7d26acc AP |
77 | static inline bool is_efi_boot(void) { |
78 | return false; | |
79 | } | |
80 | ||
81 | static inline bool is_efi_secure_boot(void) { | |
82 | return false; | |
83 | } | |
84 | ||
c4964512 JJ |
85 | static inline SecureBootMode efi_get_secure_boot_mode(void) { |
86 | return SECURE_BOOT_UNKNOWN; | |
c7d26acc AP |
87 | } |
88 | ||
8d2d6416 LB |
89 | static inline int cache_efi_options_variable(void) { |
90 | return -EOPNOTSUPP; | |
91 | } | |
92 | ||
2536752d | 93 | static inline int systemd_efi_options_variable(char **line) { |
53aa0d02 ZJS |
94 | return -ENODATA; |
95 | } | |
ad2d6880 ZJS |
96 | |
97 | static inline int systemd_efi_options_efivarfs_if_newer(char **line) { | |
98 | return -ENODATA; | |
99 | } | |
0bb2f0f1 | 100 | #endif |