#include "alloc-util.h"
#include "bootspec.h"
+#include "efi-api.h"
#include "efi-loader.h"
#include "efivars.h"
#include "fd-util.h"
#include "bootspec.h"
#include "copy.h"
#include "dirent-util.h"
+#include "efi-api.h"
#include "efi-loader.h"
#include "efivars.h"
#include "env-file.h"
#include "cryptsetup-tpm2.h"
#include "cryptsetup-util.h"
#include "device-util.h"
-#include "efi-loader.h"
+#include "efi-api.h"
#include "env-util.h"
#include "escape.h"
#include "fileio.h"
#include "cgroup-util.h"
#include "device-util.h"
#include "dirent-util.h"
+#include "efi-api.h"
#include "efi-loader.h"
#include "efivars.h"
#include "env-file.h"
#include "cgroup-util.h"
#include "condition.h"
#include "cpu-set-util.h"
-#include "efi-loader.h"
+#include "efi-api.h"
#include "env-file.h"
#include "env-util.h"
#include "extract-word.h"
--- /dev/null
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "dirent-util.h"
+#include "efi-api.h"
+#include "efivars.h"
+#include "fd-util.h"
+#include "sort-util.h"
+#include "stat-util.h"
+#include "stdio-util.h"
+#include "utf8.h"
+
+#if ENABLE_EFI
+
+#define LOAD_OPTION_ACTIVE 0x00000001
+#define MEDIA_DEVICE_PATH 0x04
+#define MEDIA_HARDDRIVE_DP 0x01
+#define MEDIA_FILEPATH_DP 0x04
+#define SIGNATURE_TYPE_GUID 0x02
+#define MBR_TYPE_EFI_PARTITION_TABLE_HEADER 0x02
+#define END_DEVICE_PATH_TYPE 0x7f
+#define END_ENTIRE_DEVICE_PATH_SUBTYPE 0xff
+
+#define EFI_OS_INDICATIONS_BOOT_TO_FW_UI UINT64_C(0x0000000000000001)
+
+#define boot_option__contents \
+ { \
+ uint32_t attr; \
+ uint16_t path_len; \
+ uint16_t title[]; \
+ }
+
+struct boot_option boot_option__contents;
+struct boot_option__packed boot_option__contents _packed_;
+assert_cc(offsetof(struct boot_option, title) == offsetof(struct boot_option__packed, title));
+/* sizeof(struct boot_option) != sizeof(struct boot_option__packed), so
+ * the *size* of the structure should not be used anywhere below. */
+
+struct drive_path {
+ uint32_t part_nr;
+ uint64_t part_start;
+ uint64_t part_size;
+ char signature[16];
+ uint8_t mbr_type;
+ uint8_t signature_type;
+} _packed_;
+
+#define device_path__contents \
+ { \
+ uint8_t type; \
+ uint8_t sub_type; \
+ uint16_t length; \
+ union { \
+ uint16_t path[0]; \
+ struct drive_path drive; \
+ }; \
+ }
+
+struct device_path device_path__contents;
+struct device_path__packed device_path__contents _packed_;
+assert_cc(sizeof(struct device_path) == sizeof(struct device_path__packed));
+
+int efi_reboot_to_firmware_supported(void) {
+ _cleanup_free_ void *v = NULL;
+ static int cache = -1;
+ uint64_t b;
+ size_t s;
+ int r;
+
+ if (cache > 0)
+ return 0;
+ if (cache == 0)
+ return -EOPNOTSUPP;
+
+ if (!is_efi_boot())
+ goto not_supported;
+
+ r = efi_get_variable(EFI_GLOBAL_VARIABLE(OsIndicationsSupported), NULL, &v, &s);
+ if (r == -ENOENT)
+ goto not_supported; /* variable doesn't exist? it's not supported then */
+ if (r < 0)
+ return r;
+ if (s != sizeof(uint64_t))
+ return -EINVAL;
+
+ b = *(uint64_t*) v;
+ if (!(b & EFI_OS_INDICATIONS_BOOT_TO_FW_UI))
+ goto not_supported; /* bit unset? it's not supported then */
+
+ cache = 1;
+ return 0;
+
+not_supported:
+ cache = 0;
+ return -EOPNOTSUPP;
+}
+
+static int get_os_indications(uint64_t *ret) {
+ static struct stat cache_stat = {};
+ _cleanup_free_ void *v = NULL;
+ static uint64_t cache;
+ struct stat new_stat;
+ size_t s;
+ int r;
+
+ assert(ret);
+
+ /* Let's verify general support first */
+ r = efi_reboot_to_firmware_supported();
+ if (r < 0)
+ return r;
+
+ /* stat() the EFI variable, to see if the mtime changed. If it did we need to cache again. */
+ if (stat(EFIVAR_PATH(EFI_GLOBAL_VARIABLE(OsIndications)), &new_stat) < 0) {
+ if (errno != ENOENT)
+ return -errno;
+
+ /* Doesn't exist? Then we can exit early (also see below) */
+ *ret = 0;
+ return 0;
+
+ } else if (stat_inode_unmodified(&new_stat, &cache_stat)) {
+ /* inode didn't change, we can return the cached value */
+ *ret = cache;
+ return 0;
+ }
+
+ r = efi_get_variable(EFI_GLOBAL_VARIABLE(OsIndications), NULL, &v, &s);
+ if (r == -ENOENT) {
+ /* Some firmware implementations that do support OsIndications and report that with
+ * OsIndicationsSupported will remove the OsIndications variable when it is unset. Let's
+ * pretend it's 0 then, to hide this implementation detail. Note that this call will return
+ * -ENOENT then only if the support for OsIndications is missing entirely, as determined by
+ * efi_reboot_to_firmware_supported() above. */
+ *ret = 0;
+ return 0;
+ }
+ if (r < 0)
+ return r;
+ if (s != sizeof(uint64_t))
+ return -EINVAL;
+
+ cache_stat = new_stat;
+ *ret = cache = *(uint64_t *)v;
+ return 0;
+}
+
+int efi_get_reboot_to_firmware(void) {
+ int r;
+ uint64_t b;
+
+ r = get_os_indications(&b);
+ if (r < 0)
+ return r;
+
+ return !!(b & EFI_OS_INDICATIONS_BOOT_TO_FW_UI);
+}
+
+int efi_set_reboot_to_firmware(bool value) {
+ int r;
+ uint64_t b, b_new;
+
+ r = get_os_indications(&b);
+ if (r < 0)
+ return r;
+
+ b_new = UPDATE_FLAG(b, EFI_OS_INDICATIONS_BOOT_TO_FW_UI, value);
+
+ /* Avoid writing to efi vars store if we can due to firmware bugs. */
+ if (b != b_new)
+ return efi_set_variable(EFI_GLOBAL_VARIABLE(OsIndications), &b_new, sizeof(uint64_t));
+
+ return 0;
+}
+
+static ssize_t utf16_size(const uint16_t *s, size_t buf_len_bytes) {
+ size_t l = 0;
+
+ /* Returns the size of the string in bytes without the terminating two zero bytes */
+
+ if (buf_len_bytes % sizeof(uint16_t) != 0)
+ return -EINVAL;
+
+ while (l < buf_len_bytes / sizeof(uint16_t)) {
+ if (s[l] == 0)
+ return (l + 1) * sizeof(uint16_t);
+ l++;
+ }
+
+ return -EINVAL; /* The terminator was not found */
+}
+
+struct guid {
+ uint32_t u1;
+ uint16_t u2;
+ uint16_t u3;
+ uint8_t u4[8];
+} _packed_;
+
+static void efi_guid_to_id128(const void *guid, sd_id128_t *id128) {
+ uint32_t u1;
+ uint16_t u2, u3;
+ const struct guid *uuid = guid;
+
+ memcpy(&u1, &uuid->u1, sizeof(uint32_t));
+ id128->bytes[0] = (u1 >> 24) & 0xff;
+ id128->bytes[1] = (u1 >> 16) & 0xff;
+ id128->bytes[2] = (u1 >> 8) & 0xff;
+ id128->bytes[3] = u1 & 0xff;
+ memcpy(&u2, &uuid->u2, sizeof(uint16_t));
+ id128->bytes[4] = (u2 >> 8) & 0xff;
+ id128->bytes[5] = u2 & 0xff;
+ memcpy(&u3, &uuid->u3, sizeof(uint16_t));
+ id128->bytes[6] = (u3 >> 8) & 0xff;
+ id128->bytes[7] = u3 & 0xff;
+ memcpy(&id128->bytes[8], uuid->u4, sizeof(uuid->u4));
+}
+
+int efi_get_boot_option(
+ uint16_t id,
+ char **ret_title,
+ sd_id128_t *ret_part_uuid,
+ char **ret_path,
+ bool *ret_active) {
+
+ char variable[STRLEN(EFI_GLOBAL_VARIABLE_STR("Boot")) + 4 + 1];
+ _cleanup_free_ uint8_t *buf = NULL;
+ size_t l;
+ struct boot_option *header;
+ ssize_t title_size;
+ _cleanup_free_ char *s = NULL, *p = NULL;
+ sd_id128_t p_uuid = SD_ID128_NULL;
+ int r;
+
+ if (!is_efi_boot())
+ return -EOPNOTSUPP;
+
+ xsprintf(variable, EFI_GLOBAL_VARIABLE_STR("Boot%04X"), id);
+ r = efi_get_variable(variable, NULL, (void **)&buf, &l);
+ if (r < 0)
+ return r;
+ if (l < offsetof(struct boot_option, title))
+ return -ENOENT;
+
+ header = (struct boot_option *)buf;
+ title_size = utf16_size(header->title, l - offsetof(struct boot_option, title));
+ if (title_size < 0)
+ return title_size;
+
+ if (ret_title) {
+ s = utf16_to_utf8(header->title, title_size);
+ if (!s)
+ return -ENOMEM;
+ }
+
+ if (header->path_len > 0) {
+ uint8_t *dbuf;
+ size_t dnext, doff;
+
+ doff = offsetof(struct boot_option, title) + title_size;
+ dbuf = buf + doff;
+ if (header->path_len > l - doff)
+ return -EINVAL;
+
+ dnext = 0;
+ while (dnext < header->path_len) {
+ struct device_path *dpath;
+
+ dpath = (struct device_path *)(dbuf + dnext);
+ if (dpath->length < 4)
+ break;
+
+ /* Type 0x7F – End of Hardware Device Path, Sub-Type 0xFF – End Entire Device Path */
+ if (dpath->type == END_DEVICE_PATH_TYPE && dpath->sub_type == END_ENTIRE_DEVICE_PATH_SUBTYPE)
+ break;
+
+ dnext += dpath->length;
+
+ /* Type 0x04 – Media Device Path */
+ if (dpath->type != MEDIA_DEVICE_PATH)
+ continue;
+
+ /* Sub-Type 1 – Hard Drive */
+ if (dpath->sub_type == MEDIA_HARDDRIVE_DP) {
+ /* 0x02 – GUID Partition Table */
+ if (dpath->drive.mbr_type != MBR_TYPE_EFI_PARTITION_TABLE_HEADER)
+ continue;
+
+ /* 0x02 – GUID signature */
+ if (dpath->drive.signature_type != SIGNATURE_TYPE_GUID)
+ continue;
+
+ if (ret_part_uuid)
+ efi_guid_to_id128(dpath->drive.signature, &p_uuid);
+ continue;
+ }
+
+ /* Sub-Type 4 – File Path */
+ if (dpath->sub_type == MEDIA_FILEPATH_DP && !p && ret_path) {
+ p = utf16_to_utf8(dpath->path, dpath->length-4);
+ if (!p)
+ return -ENOMEM;
+
+ efi_tilt_backslashes(p);
+ continue;
+ }
+ }
+ }
+
+ if (ret_title)
+ *ret_title = TAKE_PTR(s);
+ if (ret_part_uuid)
+ *ret_part_uuid = p_uuid;
+ if (ret_path)
+ *ret_path = TAKE_PTR(p);
+ if (ret_active)
+ *ret_active = header->attr & LOAD_OPTION_ACTIVE;
+
+ return 0;
+}
+
+static void to_utf16(uint16_t *dest, const char *src) {
+ int i;
+
+ for (i = 0; src[i] != '\0'; i++)
+ dest[i] = src[i];
+ dest[i] = '\0';
+}
+
+static void id128_to_efi_guid(sd_id128_t id, void *guid) {
+ struct guid uuid = {
+ .u1 = id.bytes[0] << 24 | id.bytes[1] << 16 | id.bytes[2] << 8 | id.bytes[3],
+ .u2 = id.bytes[4] << 8 | id.bytes[5],
+ .u3 = id.bytes[6] << 8 | id.bytes[7],
+ };
+ memcpy(uuid.u4, id.bytes+8, sizeof(uuid.u4));
+ memcpy(guid, &uuid, sizeof(uuid));
+}
+
+static uint16_t *tilt_slashes(uint16_t *s) {
+ for (uint16_t *p = s; *p; p++)
+ if (*p == '/')
+ *p = '\\';
+
+ return s;
+}
+
+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) {
+
+ size_t size, title_len, path_len;
+ _cleanup_free_ char *buf = NULL;
+ struct boot_option *option;
+ struct device_path *devicep;
+ char variable[STRLEN(EFI_GLOBAL_VARIABLE_STR("Boot")) + 4 + 1];
+
+ if (!is_efi_boot())
+ return -EOPNOTSUPP;
+
+ title_len = (strlen(title)+1) * 2;
+ path_len = (strlen(path)+1) * 2;
+
+ buf = malloc0(offsetof(struct boot_option, title) + title_len +
+ sizeof(struct drive_path) +
+ sizeof(struct device_path) + path_len);
+ if (!buf)
+ return -ENOMEM;
+
+ /* header */
+ option = (struct boot_option *)buf;
+ option->attr = LOAD_OPTION_ACTIVE;
+ option->path_len = offsetof(struct device_path, drive) + sizeof(struct drive_path) +
+ offsetof(struct device_path, path) + path_len +
+ offsetof(struct device_path, path);
+ to_utf16(option->title, title);
+ size = offsetof(struct boot_option, title) + title_len;
+
+ /* partition info */
+ devicep = (struct device_path *)(buf + size);
+ devicep->type = MEDIA_DEVICE_PATH;
+ devicep->sub_type = MEDIA_HARDDRIVE_DP;
+ devicep->length = offsetof(struct device_path, drive) + sizeof(struct drive_path);
+ memcpy(&devicep->drive.part_nr, &part, sizeof(uint32_t));
+ memcpy(&devicep->drive.part_start, &pstart, sizeof(uint64_t));
+ memcpy(&devicep->drive.part_size, &psize, sizeof(uint64_t));
+ id128_to_efi_guid(part_uuid, devicep->drive.signature);
+ devicep->drive.mbr_type = MBR_TYPE_EFI_PARTITION_TABLE_HEADER;
+ devicep->drive.signature_type = SIGNATURE_TYPE_GUID;
+ size += devicep->length;
+
+ /* path to loader */
+ devicep = (struct device_path *)(buf + size);
+ devicep->type = MEDIA_DEVICE_PATH;
+ devicep->sub_type = MEDIA_FILEPATH_DP;
+ devicep->length = offsetof(struct device_path, path) + path_len;
+ to_utf16(devicep->path, path);
+ tilt_slashes(devicep->path);
+ size += devicep->length;
+
+ /* end of path */
+ devicep = (struct device_path *)(buf + size);
+ devicep->type = END_DEVICE_PATH_TYPE;
+ devicep->sub_type = END_ENTIRE_DEVICE_PATH_SUBTYPE;
+ devicep->length = offsetof(struct device_path, path);
+ size += devicep->length;
+
+ xsprintf(variable, EFI_GLOBAL_VARIABLE_STR("Boot%04X"), id);
+ return efi_set_variable(variable, buf, size);
+}
+
+int efi_remove_boot_option(uint16_t id) {
+ char variable[STRLEN(EFI_GLOBAL_VARIABLE_STR("Boot")) + 4 + 1];
+
+ if (!is_efi_boot())
+ return -EOPNOTSUPP;
+
+ xsprintf(variable, EFI_GLOBAL_VARIABLE_STR("Boot%04X"), id);
+ return efi_set_variable(variable, NULL, 0);
+}
+
+int efi_get_boot_order(uint16_t **ret_order) {
+ _cleanup_free_ void *buf = NULL;
+ size_t l;
+ int r;
+
+ assert(ret_order);
+
+ if (!is_efi_boot())
+ return -EOPNOTSUPP;
+
+ r = efi_get_variable(EFI_GLOBAL_VARIABLE(BootOrder), NULL, &buf, &l);
+ if (r < 0)
+ return r;
+
+ if (l <= 0)
+ return -ENOENT;
+
+ if (l % sizeof(uint16_t) > 0 ||
+ l / sizeof(uint16_t) > INT_MAX)
+ return -EINVAL;
+
+ *ret_order = TAKE_PTR(buf);
+ return (int) (l / sizeof(uint16_t));
+}
+
+int efi_set_boot_order(const uint16_t *order, size_t n) {
+
+ if (!is_efi_boot())
+ return -EOPNOTSUPP;
+
+ return efi_set_variable(EFI_GLOBAL_VARIABLE(BootOrder), order, n * sizeof(uint16_t));
+}
+
+static int boot_id_hex(const char s[static 4]) {
+ int id = 0;
+
+ assert(s);
+
+ for (int i = 0; i < 4; i++)
+ if (s[i] >= '0' && s[i] <= '9')
+ id |= (s[i] - '0') << (3 - i) * 4;
+ else if (s[i] >= 'A' && s[i] <= 'F')
+ id |= (s[i] - 'A' + 10) << (3 - i) * 4;
+ else
+ return -EINVAL;
+
+ return id;
+}
+
+static int cmp_uint16(const uint16_t *a, const uint16_t *b) {
+ return CMP(*a, *b);
+}
+
+int efi_get_boot_options(uint16_t **ret_options) {
+ _cleanup_closedir_ DIR *dir = NULL;
+ _cleanup_free_ uint16_t *list = NULL;
+ int count = 0;
+
+ assert(ret_options);
+
+ if (!is_efi_boot())
+ return -EOPNOTSUPP;
+
+ dir = opendir(EFIVAR_PATH("."));
+ if (!dir)
+ return -errno;
+
+ FOREACH_DIRENT(de, dir, return -errno) {
+ int id;
+
+ if (strncmp(de->d_name, "Boot", 4) != 0)
+ continue;
+
+ if (strlen(de->d_name) != 45)
+ continue;
+
+ if (strcmp(de->d_name + 8, EFI_GLOBAL_VARIABLE_STR("")) != 0) /* generate variable suffix using macro */
+ continue;
+
+ id = boot_id_hex(de->d_name + 4);
+ if (id < 0)
+ continue;
+
+ if (!GREEDY_REALLOC(list, count + 1))
+ return -ENOMEM;
+
+ list[count++] = id;
+ }
+
+ typesafe_qsort(list, count, cmp_uint16);
+
+ *ret_options = TAKE_PTR(list);
+
+ return count;
+}
+
+bool efi_has_tpm2(void) {
+ static int cache = -1;
+
+ /* Returns whether the system has a TPM2 chip which is known to the EFI firmware. */
+
+ if (cache < 0) {
+
+ /* First, check if we are on an EFI boot at all. */
+ if (!is_efi_boot())
+ cache = false;
+ else {
+ /* Then, check if the ACPI table "TPM2" exists, which is the TPM2 event log table, see:
+ * https://trustedcomputinggroup.org/wp-content/uploads/TCG_ACPIGeneralSpecification_v1.20_r8.pdf
+ * This table exists whenever the firmware is hooked up to TPM2. */
+ cache = access("/sys/firmware/acpi/tables/TPM2", F_OK) >= 0;
+ if (!cache && errno != ENOENT)
+ log_debug_errno(errno, "Unable to test whether /sys/firmware/acpi/tables/TPM2 exists, assuming it doesn't: %m");
+ }
+ }
+
+ return cache;
+}
+
+#endif
+
+char *efi_tilt_backslashes(char *s) {
+ for (char *p = s; *p; p++)
+ if (*p == '\\')
+ *p = '/';
+
+ return s;
+}
--- /dev/null
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "efivars-fundamental.h"
+#include "efivars.h"
+
+/* Various calls for interfacing with EFI variables from the official UEFI specs. */
+
+#if ENABLE_EFI
+
+int efi_reboot_to_firmware_supported(void);
+int efi_get_reboot_to_firmware(void);
+int efi_set_reboot_to_firmware(bool value);
+
+int efi_get_boot_option(uint16_t nr, char **ret_title, sd_id128_t *ret_part_uuid, char **ret_path, bool *ret_active);
+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);
+int efi_remove_boot_option(uint16_t id);
+int efi_get_boot_order(uint16_t **ret_order);
+int efi_set_boot_order(const uint16_t *order, size_t n);
+int efi_get_boot_options(uint16_t **ret_options);
+
+bool efi_has_tpm2(void);
+
+#else
+
+static inline int efi_reboot_to_firmware_supported(void) {
+ return -EOPNOTSUPP;
+}
+
+static inline int efi_get_reboot_to_firmware(void) {
+ return -EOPNOTSUPP;
+}
+
+static inline int efi_set_reboot_to_firmware(bool value) {
+ return -EOPNOTSUPP;
+}
+
+static inline int efi_get_boot_option(uint16_t nr, char **ret_title, sd_id128_t *ret_part_uuid, char **ret_path, bool *ret_active) {
+ return -EOPNOTSUPP;
+}
+
+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) {
+ return -EOPNOTSUPP;
+}
+
+static inline int efi_remove_boot_option(uint16_t id) {
+ return -EOPNOTSUPP;
+}
+
+static inline int efi_get_boot_order(uint16_t **ret_order) {
+ return -EOPNOTSUPP;
+}
+
+static inline int efi_set_boot_order(const uint16_t *order, size_t n) {
+ return -EOPNOTSUPP;
+}
+
+static inline int efi_get_boot_options(uint16_t **ret_options) {
+ return -EOPNOTSUPP;
+}
+
+static inline bool efi_has_tpm2(void) {
+ return false;
+}
+
+#endif
+
+char *efi_tilt_backslashes(char *s);
/* SPDX-License-Identifier: LGPL-2.1-or-later */
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
#include "alloc-util.h"
-#include "dirent-util.h"
#include "efi-loader.h"
-#include "efivars.h"
-#include "fd-util.h"
-#include "io-util.h"
#include "parse-util.h"
-#include "sort-util.h"
+#include "path-util.h"
#include "stat-util.h"
-#include "stdio-util.h"
-#include "string-util.h"
+#include "strv.h"
#include "utf8.h"
-#include "virt.h"
#if ENABLE_EFI
-#define LOAD_OPTION_ACTIVE 0x00000001
-#define MEDIA_DEVICE_PATH 0x04
-#define MEDIA_HARDDRIVE_DP 0x01
-#define MEDIA_FILEPATH_DP 0x04
-#define SIGNATURE_TYPE_GUID 0x02
-#define MBR_TYPE_EFI_PARTITION_TABLE_HEADER 0x02
-#define END_DEVICE_PATH_TYPE 0x7f
-#define END_ENTIRE_DEVICE_PATH_SUBTYPE 0xff
-#define EFI_OS_INDICATIONS_BOOT_TO_FW_UI 0x0000000000000001
-
-#define boot_option__contents \
- { \
- uint32_t attr; \
- uint16_t path_len; \
- uint16_t title[]; \
- }
-
-struct boot_option boot_option__contents;
-struct boot_option__packed boot_option__contents _packed_;
-assert_cc(offsetof(struct boot_option, title) == offsetof(struct boot_option__packed, title));
-/* sizeof(struct boot_option) != sizeof(struct boot_option__packed), so
- * the *size* of the structure should not be used anywhere below. */
-
-struct drive_path {
- uint32_t part_nr;
- uint64_t part_start;
- uint64_t part_size;
- char signature[16];
- uint8_t mbr_type;
- uint8_t signature_type;
-} _packed_;
-
-#define device_path__contents \
- { \
- uint8_t type; \
- uint8_t sub_type; \
- uint16_t length; \
- union { \
- uint16_t path[0]; \
- struct drive_path drive; \
- }; \
- }
-
-struct device_path device_path__contents;
-struct device_path__packed device_path__contents _packed_;
-assert_cc(sizeof(struct device_path) == sizeof(struct device_path__packed));
-
-int efi_reboot_to_firmware_supported(void) {
- _cleanup_free_ void *v = NULL;
- static int cache = -1;
- uint64_t b;
- size_t s;
- int r;
-
- if (cache > 0)
- return 0;
- if (cache == 0)
- return -EOPNOTSUPP;
-
- if (!is_efi_boot())
- goto not_supported;
-
- r = efi_get_variable(EFI_GLOBAL_VARIABLE(OsIndicationsSupported), NULL, &v, &s);
- if (r == -ENOENT)
- goto not_supported; /* variable doesn't exist? it's not supported then */
- if (r < 0)
- return r;
- if (s != sizeof(uint64_t))
- return -EINVAL;
-
- b = *(uint64_t*) v;
- if (!(b & EFI_OS_INDICATIONS_BOOT_TO_FW_UI))
- goto not_supported; /* bit unset? it's not supported then */
-
- cache = 1;
- return 0;
-
-not_supported:
- cache = 0;
- return -EOPNOTSUPP;
-}
-
-static int get_os_indications(uint64_t *ret) {
- static struct stat cache_stat = {};
- _cleanup_free_ void *v = NULL;
- static uint64_t cache;
- struct stat new_stat;
- size_t s;
- int r;
-
- assert(ret);
-
- /* Let's verify general support first */
- r = efi_reboot_to_firmware_supported();
- if (r < 0)
- return r;
-
- /* stat() the EFI variable, to see if the mtime changed. If it did we need to cache again. */
- if (stat(EFIVAR_PATH(EFI_GLOBAL_VARIABLE(OsIndications)), &new_stat) < 0) {
- if (errno != ENOENT)
- return -errno;
-
- /* Doesn't exist? Then we can exit early (also see below) */
- *ret = 0;
- return 0;
-
- } else if (stat_inode_unmodified(&new_stat, &cache_stat)) {
- /* inode didn't change, we can return the cached value */
- *ret = cache;
- return 0;
- }
-
- r = efi_get_variable(EFI_GLOBAL_VARIABLE(OsIndications), NULL, &v, &s);
- if (r == -ENOENT) {
- /* Some firmware implementations that do support OsIndications and report that with
- * OsIndicationsSupported will remove the OsIndications variable when it is unset. Let's
- * pretend it's 0 then, to hide this implementation detail. Note that this call will return
- * -ENOENT then only if the support for OsIndications is missing entirely, as determined by
- * efi_reboot_to_firmware_supported() above. */
- *ret = 0;
- return 0;
- }
- if (r < 0)
- return r;
- if (s != sizeof(uint64_t))
- return -EINVAL;
-
- cache_stat = new_stat;
- *ret = cache = *(uint64_t *)v;
- return 0;
-}
-
-int efi_get_reboot_to_firmware(void) {
- int r;
- uint64_t b;
-
- r = get_os_indications(&b);
- if (r < 0)
- return r;
-
- return !!(b & EFI_OS_INDICATIONS_BOOT_TO_FW_UI);
-}
-
-int efi_set_reboot_to_firmware(bool value) {
- int r;
- uint64_t b, b_new;
-
- r = get_os_indications(&b);
- if (r < 0)
- return r;
-
- b_new = UPDATE_FLAG(b, EFI_OS_INDICATIONS_BOOT_TO_FW_UI, value);
-
- /* Avoid writing to efi vars store if we can due to firmware bugs. */
- if (b != b_new)
- return efi_set_variable(EFI_GLOBAL_VARIABLE(OsIndications), &b_new, sizeof(uint64_t));
-
- return 0;
-}
-
-static ssize_t utf16_size(const uint16_t *s, size_t buf_len_bytes) {
- size_t l = 0;
-
- /* Returns the size of the string in bytes without the terminating two zero bytes */
-
- if (buf_len_bytes % sizeof(uint16_t) != 0)
- return -EINVAL;
-
- while (l < buf_len_bytes / sizeof(uint16_t)) {
- if (s[l] == 0)
- return (l + 1) * sizeof(uint16_t);
- l++;
- }
-
- return -EINVAL; /* The terminator was not found */
-}
-
-struct guid {
- uint32_t u1;
- uint16_t u2;
- uint16_t u3;
- uint8_t u4[8];
-} _packed_;
-
-static void efi_guid_to_id128(const void *guid, sd_id128_t *id128) {
- uint32_t u1;
- uint16_t u2, u3;
- const struct guid *uuid = guid;
-
- memcpy(&u1, &uuid->u1, sizeof(uint32_t));
- id128->bytes[0] = (u1 >> 24) & 0xff;
- id128->bytes[1] = (u1 >> 16) & 0xff;
- id128->bytes[2] = (u1 >> 8) & 0xff;
- id128->bytes[3] = u1 & 0xff;
- memcpy(&u2, &uuid->u2, sizeof(uint16_t));
- id128->bytes[4] = (u2 >> 8) & 0xff;
- id128->bytes[5] = u2 & 0xff;
- memcpy(&u3, &uuid->u3, sizeof(uint16_t));
- id128->bytes[6] = (u3 >> 8) & 0xff;
- id128->bytes[7] = u3 & 0xff;
- memcpy(&id128->bytes[8], uuid->u4, sizeof(uuid->u4));
-}
-
-int efi_get_boot_option(
- uint16_t id,
- char **title,
- sd_id128_t *part_uuid,
- char **path,
- bool *active) {
-
- char variable[STRLEN(EFI_GLOBAL_VARIABLE_STR("Boot")) + 4 + 1];
- _cleanup_free_ uint8_t *buf = NULL;
- size_t l;
- struct boot_option *header;
- ssize_t title_size;
- _cleanup_free_ char *s = NULL, *p = NULL;
- sd_id128_t p_uuid = SD_ID128_NULL;
- int r;
-
- if (!is_efi_boot())
- return -EOPNOTSUPP;
-
- xsprintf(variable, EFI_GLOBAL_VARIABLE_STR("Boot%04X"), id);
- r = efi_get_variable(variable, NULL, (void **)&buf, &l);
- if (r < 0)
- return r;
- if (l < offsetof(struct boot_option, title))
- return -ENOENT;
-
- header = (struct boot_option *)buf;
- title_size = utf16_size(header->title, l - offsetof(struct boot_option, title));
- if (title_size < 0)
- return title_size;
-
- if (title) {
- s = utf16_to_utf8(header->title, title_size);
- if (!s)
- return -ENOMEM;
- }
-
- if (header->path_len > 0) {
- uint8_t *dbuf;
- size_t dnext, doff;
-
- doff = offsetof(struct boot_option, title) + title_size;
- dbuf = buf + doff;
- if (header->path_len > l - doff)
- return -EINVAL;
-
- dnext = 0;
- while (dnext < header->path_len) {
- struct device_path *dpath;
-
- dpath = (struct device_path *)(dbuf + dnext);
- if (dpath->length < 4)
- break;
-
- /* Type 0x7F – End of Hardware Device Path, Sub-Type 0xFF – End Entire Device Path */
- if (dpath->type == END_DEVICE_PATH_TYPE && dpath->sub_type == END_ENTIRE_DEVICE_PATH_SUBTYPE)
- break;
-
- dnext += dpath->length;
-
- /* Type 0x04 – Media Device Path */
- if (dpath->type != MEDIA_DEVICE_PATH)
- continue;
-
- /* Sub-Type 1 – Hard Drive */
- if (dpath->sub_type == MEDIA_HARDDRIVE_DP) {
- /* 0x02 – GUID Partition Table */
- if (dpath->drive.mbr_type != MBR_TYPE_EFI_PARTITION_TABLE_HEADER)
- continue;
-
- /* 0x02 – GUID signature */
- if (dpath->drive.signature_type != SIGNATURE_TYPE_GUID)
- continue;
-
- if (part_uuid)
- efi_guid_to_id128(dpath->drive.signature, &p_uuid);
- continue;
- }
-
- /* Sub-Type 4 – File Path */
- if (dpath->sub_type == MEDIA_FILEPATH_DP && !p && path) {
- p = utf16_to_utf8(dpath->path, dpath->length-4);
- if (!p)
- return -ENOMEM;
-
- efi_tilt_backslashes(p);
- continue;
- }
- }
- }
-
- if (title)
- *title = TAKE_PTR(s);
- if (part_uuid)
- *part_uuid = p_uuid;
- if (path)
- *path = TAKE_PTR(p);
- if (active)
- *active = header->attr & LOAD_OPTION_ACTIVE;
-
- return 0;
-}
-
-static void to_utf16(uint16_t *dest, const char *src) {
- int i;
-
- for (i = 0; src[i] != '\0'; i++)
- dest[i] = src[i];
- dest[i] = '\0';
-}
-
-static void id128_to_efi_guid(sd_id128_t id, void *guid) {
- struct guid uuid = {
- .u1 = id.bytes[0] << 24 | id.bytes[1] << 16 | id.bytes[2] << 8 | id.bytes[3],
- .u2 = id.bytes[4] << 8 | id.bytes[5],
- .u3 = id.bytes[6] << 8 | id.bytes[7],
- };
- memcpy(uuid.u4, id.bytes+8, sizeof(uuid.u4));
- memcpy(guid, &uuid, sizeof(uuid));
-}
-
-static uint16_t *tilt_slashes(uint16_t *s) {
- for (uint16_t *p = s; *p; p++)
- if (*p == '/')
- *p = '\\';
-
- return s;
-}
-
-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) {
-
- size_t size, title_len, path_len;
- _cleanup_free_ char *buf = NULL;
- struct boot_option *option;
- struct device_path *devicep;
- char variable[STRLEN(EFI_GLOBAL_VARIABLE_STR("Boot")) + 4 + 1];
-
- if (!is_efi_boot())
- return -EOPNOTSUPP;
-
- title_len = (strlen(title)+1) * 2;
- path_len = (strlen(path)+1) * 2;
-
- buf = malloc0(offsetof(struct boot_option, title) + title_len +
- sizeof(struct drive_path) +
- sizeof(struct device_path) + path_len);
- if (!buf)
- return -ENOMEM;
-
- /* header */
- option = (struct boot_option *)buf;
- option->attr = LOAD_OPTION_ACTIVE;
- option->path_len = offsetof(struct device_path, drive) + sizeof(struct drive_path) +
- offsetof(struct device_path, path) + path_len +
- offsetof(struct device_path, path);
- to_utf16(option->title, title);
- size = offsetof(struct boot_option, title) + title_len;
-
- /* partition info */
- devicep = (struct device_path *)(buf + size);
- devicep->type = MEDIA_DEVICE_PATH;
- devicep->sub_type = MEDIA_HARDDRIVE_DP;
- devicep->length = offsetof(struct device_path, drive) + sizeof(struct drive_path);
- memcpy(&devicep->drive.part_nr, &part, sizeof(uint32_t));
- memcpy(&devicep->drive.part_start, &pstart, sizeof(uint64_t));
- memcpy(&devicep->drive.part_size, &psize, sizeof(uint64_t));
- id128_to_efi_guid(part_uuid, devicep->drive.signature);
- devicep->drive.mbr_type = MBR_TYPE_EFI_PARTITION_TABLE_HEADER;
- devicep->drive.signature_type = SIGNATURE_TYPE_GUID;
- size += devicep->length;
-
- /* path to loader */
- devicep = (struct device_path *)(buf + size);
- devicep->type = MEDIA_DEVICE_PATH;
- devicep->sub_type = MEDIA_FILEPATH_DP;
- devicep->length = offsetof(struct device_path, path) + path_len;
- to_utf16(devicep->path, path);
- tilt_slashes(devicep->path);
- size += devicep->length;
-
- /* end of path */
- devicep = (struct device_path *)(buf + size);
- devicep->type = END_DEVICE_PATH_TYPE;
- devicep->sub_type = END_ENTIRE_DEVICE_PATH_SUBTYPE;
- devicep->length = offsetof(struct device_path, path);
- size += devicep->length;
-
- xsprintf(variable, EFI_GLOBAL_VARIABLE_STR("Boot%04X"), id);
- return efi_set_variable(variable, buf, size);
-}
-
-int efi_remove_boot_option(uint16_t id) {
- char variable[STRLEN(EFI_GLOBAL_VARIABLE_STR("Boot")) + 4 + 1];
-
- if (!is_efi_boot())
- return -EOPNOTSUPP;
-
- xsprintf(variable, EFI_GLOBAL_VARIABLE_STR("Boot%04X"), id);
- return efi_set_variable(variable, NULL, 0);
-}
-
-int efi_get_boot_order(uint16_t **order) {
- _cleanup_free_ void *buf = NULL;
- size_t l;
- int r;
-
- if (!is_efi_boot())
- return -EOPNOTSUPP;
-
- r = efi_get_variable(EFI_GLOBAL_VARIABLE(BootOrder), NULL, &buf, &l);
- if (r < 0)
- return r;
-
- if (l <= 0)
- return -ENOENT;
-
- if (l % sizeof(uint16_t) > 0 ||
- l / sizeof(uint16_t) > INT_MAX)
- return -EINVAL;
-
- *order = TAKE_PTR(buf);
- return (int) (l / sizeof(uint16_t));
-}
-
-int efi_set_boot_order(uint16_t *order, size_t n) {
-
- if (!is_efi_boot())
- return -EOPNOTSUPP;
-
- return efi_set_variable(EFI_GLOBAL_VARIABLE(BootOrder), order, n * sizeof(uint16_t));
-}
-
-static int boot_id_hex(const char s[static 4]) {
- int id = 0;
-
- assert(s);
-
- for (int i = 0; i < 4; i++)
- if (s[i] >= '0' && s[i] <= '9')
- id |= (s[i] - '0') << (3 - i) * 4;
- else if (s[i] >= 'A' && s[i] <= 'F')
- id |= (s[i] - 'A' + 10) << (3 - i) * 4;
- else
- return -EINVAL;
-
- return id;
-}
-
-static int cmp_uint16(const uint16_t *a, const uint16_t *b) {
- return CMP(*a, *b);
-}
-
-int efi_get_boot_options(uint16_t **options) {
- _cleanup_closedir_ DIR *dir = NULL;
- _cleanup_free_ uint16_t *list = NULL;
- int count = 0;
-
- assert(options);
-
- if (!is_efi_boot())
- return -EOPNOTSUPP;
-
- dir = opendir(EFIVAR_PATH("."));
- if (!dir)
- return -errno;
-
- FOREACH_DIRENT(de, dir, return -errno) {
- int id;
-
- if (strncmp(de->d_name, "Boot", 4) != 0)
- continue;
-
- if (strlen(de->d_name) != 45)
- continue;
-
- if (strcmp(de->d_name + 8, EFI_GLOBAL_VARIABLE_STR("")) != 0) /* generate variable suffix using macro */
- continue;
-
- id = boot_id_hex(de->d_name + 4);
- if (id < 0)
- continue;
-
- if (!GREEDY_REALLOC(list, count + 1))
- return -ENOMEM;
-
- list[count++] = id;
- }
-
- typesafe_qsort(list, count, cmp_uint16);
-
- *options = TAKE_PTR(list);
-
- return count;
-}
-
-static int read_usec(const char *variable, usec_t *u) {
+static int read_usec(const char *variable, usec_t *ret) {
_cleanup_free_ char *j = NULL;
- int r;
uint64_t x = 0;
+ int r;
assert(variable);
- assert(u);
+ assert(ret);
r = efi_get_variable_string(variable, &j);
if (r < 0)
if (r < 0)
return r;
- *u = x;
+ *ret = x;
return 0;
}
-int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader) {
+int efi_loader_get_boot_usec(usec_t *ret_firmware, usec_t *ret_loader) {
uint64_t x, y;
int r;
- assert(firmware);
- assert(loader);
+ assert(ret_firmware);
+ assert(ret_loader);
if (!is_efi_boot())
return -EOPNOTSUPP;
"Bad LoaderTimeInitUSec=%"PRIu64", LoaderTimeExecUSec=%" PRIu64"; refusing.",
x, y);
- *firmware = x;
- *loader = y;
-
+ *ret_firmware = x;
+ *ret_loader = y;
return 0;
}
-int efi_loader_get_device_part_uuid(sd_id128_t *u) {
+int efi_loader_get_device_part_uuid(sd_id128_t *ret) {
_cleanup_free_ char *p = NULL;
int r, parsed[16];
+ assert(ret);
+
if (!is_efi_boot())
return -EOPNOTSUPP;
&parsed[12], &parsed[13], &parsed[14], &parsed[15]) != 16)
return -EIO;
- if (u)
+ if (ret)
for (unsigned i = 0; i < ELEMENTSOF(parsed); i++)
- u->bytes[i] = parsed[i];
+ ret->bytes[i] = parsed[i];
return 0;
}
size_t s;
int r;
+ assert(ret);
+
if (!is_efi_boot()) {
*ret = 0;
return 0;
return 0;
}
-bool efi_has_tpm2(void) {
- static int cache = -1;
-
- /* Returns whether the system has a TPM2 chip which is known to the EFI firmware. */
-
- if (cache < 0) {
-
- /* First, check if we are on an EFI boot at all. */
- if (!is_efi_boot())
- cache = false;
- else {
- /* Then, check if the ACPI table "TPM2" exists, which is the TPM2 event log table, see:
- * https://trustedcomputinggroup.org/wp-content/uploads/TCG_ACPIGeneralSpecification_v1.20_r8.pdf
- * This table exists whenever the firmware is hooked up to TPM2. */
- cache = access("/sys/firmware/acpi/tables/TPM2", F_OK) >= 0;
- if (!cache && errno != ENOENT)
- log_debug_errno(errno, "Unable to test whether /sys/firmware/acpi/tables/TPM2 exists, assuming it doesn't: %m");
- }
- }
-
- return cache;
-}
-
#endif
bool efi_loader_entry_name_valid(const char *s) {
return in_charset(s, ALPHANUMERICAL "+-_.");
}
-
-char *efi_tilt_backslashes(char *s) {
- for (char *p = s; *p; p++)
- if (*p == '\\')
- *p = '/';
-
- return s;
-}
#include "efivars-fundamental.h"
#include "efivars.h"
-#if ENABLE_EFI
-
-int efi_reboot_to_firmware_supported(void);
-int efi_get_reboot_to_firmware(void);
-int efi_set_reboot_to_firmware(bool value);
+/* Various calls that interface with EFI variables implementing https://systemd.io/BOOT_LOADER_INTERFACE */
-int efi_get_boot_option(uint16_t nr, char **title, sd_id128_t *part_uuid, char **path, bool *active);
-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);
-int efi_remove_boot_option(uint16_t id);
-int efi_get_boot_order(uint16_t **order);
-int efi_set_boot_order(uint16_t *order, size_t n);
-int efi_get_boot_options(uint16_t **options);
+#if ENABLE_EFI
-int efi_loader_get_device_part_uuid(sd_id128_t *u);
-int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader);
+int efi_loader_get_device_part_uuid(sd_id128_t *ret);
+int efi_loader_get_boot_usec(usec_t *ret_firmware, usec_t *ret_loader);
int efi_loader_get_entries(char ***ret);
int efi_loader_get_config_timeout_one_shot(usec_t *ret);
int efi_loader_update_entry_one_shot_cache(char **cache, struct stat *cache_stat);
-bool efi_has_tpm2(void);
-
#else
-static inline int efi_reboot_to_firmware_supported(void) {
- return -EOPNOTSUPP;
-}
-
-static inline int efi_get_reboot_to_firmware(void) {
- return -EOPNOTSUPP;
-}
-
-static inline int efi_set_reboot_to_firmware(bool value) {
- return -EOPNOTSUPP;
-}
-
-static inline int efi_get_boot_option(uint16_t nr, char **title, sd_id128_t *part_uuid, char **path, bool *active) {
- return -EOPNOTSUPP;
-}
-
-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) {
- return -EOPNOTSUPP;
-}
-
-static inline int efi_remove_boot_option(uint16_t id) {
- return -EOPNOTSUPP;
-}
-
-static inline int efi_get_boot_order(uint16_t **order) {
- return -EOPNOTSUPP;
-}
-
-static inline int efi_set_boot_order(uint16_t *order, size_t n) {
- return -EOPNOTSUPP;
-}
-
-static inline int efi_get_boot_options(uint16_t **options) {
- return -EOPNOTSUPP;
-}
-
static inline int efi_loader_get_device_part_uuid(sd_id128_t *u) {
return -EOPNOTSUPP;
}
return -EOPNOTSUPP;
}
-static inline bool efi_has_tpm2(void) {
- return false;
-}
-
#endif
bool efi_loader_entry_name_valid(const char *s);
-
-char *efi_tilt_backslashes(char *s);
'dns-domain.h',
'dropin.c',
'dropin.h',
+ 'efi-api.c',
+ 'efi-api.h',
'efi-loader.c',
'efi-loader.h',
'elf-util.c',
projects / thirdparty / systemd.git / commitdiff
