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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
commit | b750101eb236130cf056c675997decbac904cc49 (patch) | |
tree | a5df1a06754bdd014cb975c051c83b01c9a97532 /src/basic/efivars.h | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.zip |
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/basic/efivars.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/basic/efivars.h b/src/basic/efivars.h new file mode 100644 index 0000000..bafe2d3 --- /dev/null +++ b/src/basic/efivars.h @@ -0,0 +1,100 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#if !ENABLE_EFI +# include <errno.h> +#endif +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> + +#include "sd-id128.h" + +#include "efivars-fundamental.h" +#include "time-util.h" + +#define EFI_VENDOR_LOADER SD_ID128_MAKE(4a,67,b0,82,0a,4c,41,cf,b6,c7,44,0b,29,bb,8c,4f) +#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) +#define EFI_VENDOR_GLOBAL SD_ID128_MAKE(8b,e4,df,61,93,ca,11,d2,aa,0d,00,e0,98,03,2b,8c) +#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) +#define EFI_VENDOR_SYSTEMD SD_ID128_MAKE(8c,f2,64,4b,4b,0b,42,8f,93,87,6d,87,60,50,dc,67) +#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) + +#define EFI_VARIABLE_NON_VOLATILE UINT32_C(0x00000001) +#define EFI_VARIABLE_BOOTSERVICE_ACCESS UINT32_C(0x00000002) +#define EFI_VARIABLE_RUNTIME_ACCESS UINT32_C(0x00000004) + +/* Note that the <lowercaseuuid>-<varname> naming scheme is an efivarfs convention, i.e. part of the Linux + * API file system implementation for EFI. EFI itself processes UIDS in binary form. + */ + +#define EFI_VENDOR_VARIABLE_STR(vendor, name) name "-" vendor + +#define EFI_GLOBAL_VARIABLE_STR(name) EFI_VENDOR_VARIABLE_STR(EFI_VENDOR_GLOBAL_STR, name) +#define EFI_LOADER_VARIABLE_STR(name) EFI_VENDOR_VARIABLE_STR(EFI_VENDOR_LOADER_STR, name) +#define EFI_SYSTEMD_VARIABLE_STR(name) EFI_VENDOR_VARIABLE_STR(EFI_VENDOR_SYSTEMD_STR, name) + +#define EFI_GLOBAL_VARIABLE(name) EFI_GLOBAL_VARIABLE_STR(STRINGIFY(name)) +#define EFI_LOADER_VARIABLE(name) EFI_LOADER_VARIABLE_STR(STRINGIFY(name)) +#define EFI_SYSTEMD_VARIABLE(name) EFI_SYSTEMD_VARIABLE_STR(STRINGIFY(name)) + +#define EFIVAR_PATH(variable) "/sys/firmware/efi/efivars/" variable +#define EFIVAR_CACHE_PATH(variable) "/run/systemd/efivars/" variable + +#if ENABLE_EFI + +int efi_get_variable(const char *variable, uint32_t *attribute, void **ret_value, size_t *ret_size); +int efi_get_variable_string(const char *variable, char **ret); +int efi_set_variable(const char *variable, const void *value, size_t size); +int efi_set_variable_string(const char *variable, const char *p); + +bool is_efi_boot(void); +bool is_efi_secure_boot(void); +SecureBootMode efi_get_secure_boot_mode(void); + +int cache_efi_options_variable(void); +int systemd_efi_options_variable(char **ret); +int systemd_efi_options_efivarfs_if_newer(char **ret); + +#else + +static inline int efi_get_variable(const char *variable, uint32_t *attribute, void **value, size_t *size) { + return -EOPNOTSUPP; +} + +static inline int efi_get_variable_string(const char *variable, char **ret) { + return -EOPNOTSUPP; +} + +static inline int efi_set_variable(const char *variable, const void *value, size_t size) { + return -EOPNOTSUPP; +} + +static inline int efi_set_variable_string(const char *variable, const char *p) { + return -EOPNOTSUPP; +} + +static inline bool is_efi_boot(void) { + return false; +} + +static inline bool is_efi_secure_boot(void) { + return false; +} + +static inline SecureBootMode efi_get_secure_boot_mode(void) { + return SECURE_BOOT_UNKNOWN; +} + +static inline int cache_efi_options_variable(void) { + return -EOPNOTSUPP; +} + +static inline int systemd_efi_options_variable(char **line) { + return -ENODATA; +} + +static inline int systemd_efi_options_efivarfs_if_newer(char **line) { + return -ENODATA; +} +#endif |