diff options
Diffstat (limited to 'src/shared')
| -rw-r--r-- | src/shared/boot-timestamps.c | 66 | ||||
| -rw-r--r-- | src/shared/boot-timestamps.h | 27 | ||||
| -rw-r--r-- | src/shared/efivars.c | 617 | ||||
| -rw-r--r-- | src/shared/efivars.h | 53 |
4 files changed, 0 insertions, 763 deletions
diff --git a/src/shared/boot-timestamps.c b/src/shared/boot-timestamps.c deleted file mode 100644 index 68419595fb..0000000000 --- a/src/shared/boot-timestamps.c +++ /dev/null @@ -1,66 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2012 Lennart Poettering - Copyright 2013 Kay Sievers - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include "boot-timestamps.h" -#include "acpi-fpdt.h" -#include "efivars.h" - -int boot_timestamps(const dual_timestamp *n, dual_timestamp *firmware, dual_timestamp *loader) { - usec_t x = 0, y = 0, a; - int r; - dual_timestamp _n; - - assert(firmware); - assert(loader); - - if (!n) { - dual_timestamp_get(&_n); - n = &_n; - } - - r = acpi_get_boot_usec(&x, &y); - if (r < 0) { -#ifdef ENABLE_EFI - r = efi_loader_get_boot_usec(&x, &y); - if (r < 0) -#endif - return r; - } - - /* Let's convert this to timestamps where the firmware - * began/loader began working. To make this more confusing: - * since usec_t is unsigned and the kernel's monotonic clock - * begins at kernel initialization we'll actually initialize - * the monotonic timestamps here as negative of the actual - * value. */ - - firmware->monotonic = y; - loader->monotonic = y - x; - - a = n->monotonic + firmware->monotonic; - firmware->realtime = n->realtime > a ? n->realtime - a : 0; - - a = n->monotonic + loader->monotonic; - loader->realtime = n->realtime > a ? n->realtime - a : 0; - - return 0; -} diff --git a/src/shared/boot-timestamps.h b/src/shared/boot-timestamps.h deleted file mode 100644 index a3d2405b56..0000000000 --- a/src/shared/boot-timestamps.h +++ /dev/null @@ -1,27 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -#pragma once - -/*** - This file is part of systemd. - - Copyright 2012 Lennart Poettering - Copyright 2013 Kay Sievers - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <time-util.h> - -int boot_timestamps(const dual_timestamp *n, dual_timestamp *firmware, dual_timestamp *loader); diff --git a/src/shared/efivars.c b/src/shared/efivars.c deleted file mode 100644 index 20067c601a..0000000000 --- a/src/shared/efivars.c +++ /dev/null @@ -1,617 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2013 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <unistd.h> -#include <string.h> -#include <fcntl.h> - -#include "util.h" -#include "utf8.h" -#include "efivars.h" - -#ifdef 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 - -struct boot_option { - uint32_t attr; - uint16_t path_len; - uint16_t title[]; -} _packed_; - -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_; - -struct device_path { - uint8_t type; - uint8_t sub_type; - uint16_t length; - union { - uint16_t path[0]; - struct drive_path drive; - }; -} _packed_; - -bool is_efi_boot(void) { - return access("/sys/firmware/efi", F_OK) >= 0; -} - -static int read_flag(const char *varname) { - int r; - _cleanup_free_ void *v = NULL; - size_t s; - uint8_t b; - - r = efi_get_variable(EFI_VENDOR_GLOBAL, varname, NULL, &v, &s); - if (r < 0) - return r; - - if (s != 1) - return -EINVAL; - - b = *(uint8_t *)v; - r = b > 0; - return r; -} - -int is_efi_secure_boot(void) { - return read_flag("SecureBoot"); -} - -int is_efi_secure_boot_setup_mode(void) { - return read_flag("SetupMode"); -} - -int efi_get_variable( - sd_id128_t vendor, - const char *name, - uint32_t *attribute, - void **value, - size_t *size) { - - _cleanup_close_ int fd = -1; - _cleanup_free_ char *p = NULL; - uint32_t a; - ssize_t n; - struct stat st; - _cleanup_free_ void *buf = NULL; - - assert(name); - assert(value); - assert(size); - - if (asprintf(&p, - "/sys/firmware/efi/efivars/%s-%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", - name, SD_ID128_FORMAT_VAL(vendor)) < 0) - return -ENOMEM; - - fd = open(p, O_RDONLY|O_NOCTTY|O_CLOEXEC); - if (fd < 0) - return -errno; - - if (fstat(fd, &st) < 0) - return -errno; - if (st.st_size < 4) - return -EIO; - if (st.st_size > 4*1024*1024 + 4) - return -E2BIG; - - n = read(fd, &a, sizeof(a)); - if (n < 0) - return -errno; - if (n != sizeof(a)) - return -EIO; - - buf = malloc(st.st_size - 4 + 2); - if (!buf) - return -ENOMEM; - - n = read(fd, buf, (size_t) st.st_size - 4); - if (n < 0) - return -errno; - if (n != (ssize_t) st.st_size - 4) - return -EIO; - - /* Always NUL terminate (2 bytes, to protect UTF-16) */ - ((char*) buf)[st.st_size - 4] = 0; - ((char*) buf)[st.st_size - 4 + 1] = 0; - - *value = buf; - buf = NULL; - *size = (size_t) st.st_size - 4; - - if (attribute) - *attribute = a; - - return 0; -} - -int efi_set_variable( - sd_id128_t vendor, - const char *name, - const void *value, - size_t size) { - - struct var { - uint32_t attr; - char buf[]; - } _packed_ * _cleanup_free_ buf = NULL; - _cleanup_free_ char *p = NULL; - _cleanup_close_ int fd = -1; - - assert(name); - - if (asprintf(&p, - "/sys/firmware/efi/efivars/%s-%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", - name, SD_ID128_FORMAT_VAL(vendor)) < 0) - return -ENOMEM; - - if (size == 0) { - if (unlink(p) < 0) - return -errno; - return 0; - } - - fd = open(p, O_WRONLY|O_CREAT|O_NOCTTY|O_CLOEXEC, 0644); - if (fd < 0) - return -errno; - - buf = malloc(sizeof(uint32_t) + size); - if (!buf) - return -ENOMEM; - - buf->attr = EFI_VARIABLE_NON_VOLATILE|EFI_VARIABLE_BOOTSERVICE_ACCESS|EFI_VARIABLE_RUNTIME_ACCESS; - memcpy(buf->buf, value, size); - - return loop_write(fd, buf, sizeof(uint32_t) + size, false); -} - -int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p) { - _cleanup_free_ void *s = NULL; - size_t ss = 0; - int r; - char *x; - - r = efi_get_variable(vendor, name, NULL, &s, &ss); - if (r < 0) - return r; - - x = utf16_to_utf8(s, ss); - if (!x) - return -ENOMEM; - - *p = x; - return 0; -} - -static size_t utf16_size(const uint16_t *s) { - size_t l = 0; - - while (s[l] > 0) - l++; - - return (l+1) * sizeof(uint16_t); -} - -static void efi_guid_to_id128(const void *guid, sd_id128_t *id128) { - struct uuid { - uint32_t u1; - uint16_t u2; - uint16_t u3; - uint8_t u4[8]; - } _packed_; - const struct uuid *uuid = guid; - - id128->bytes[0] = (uuid->u1 >> 24) & 0xff; - id128->bytes[1] = (uuid->u1 >> 16) & 0xff; - id128->bytes[2] = (uuid->u1 >> 8) & 0xff; - id128->bytes[3] = (uuid->u1) & 0xff; - id128->bytes[4] = (uuid->u2 >> 8) & 0xff; - id128->bytes[5] = (uuid->u2) & 0xff; - id128->bytes[6] = (uuid->u3 >> 8) & 0xff; - id128->bytes[7] = (uuid->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 boot_id[9]; - _cleanup_free_ uint8_t *buf = NULL; - size_t l; - struct boot_option *header; - size_t title_size; - _cleanup_free_ char *s = NULL, *p = NULL; - sd_id128_t p_uuid = SD_ID128_NULL; - int r; - - xsprintf(boot_id, "Boot%04X", id); - r = efi_get_variable(EFI_VENDOR_GLOBAL, boot_id, NULL, (void **)&buf, &l); - if (r < 0) - return r; - if (l < sizeof(struct boot_option)) - return -ENOENT; - - header = (struct boot_option *)buf; - title_size = utf16_size(header->title); - if (title_size > l - offsetof(struct boot_option, title)) - return -EINVAL; - - 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; - - dbuf = buf + offsetof(struct boot_option, title) + title_size; - 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); - efi_tilt_backslashes(p); - continue; - } - } - } - - if (title) { - *title = s; - s = NULL; - } - if (part_uuid) - *part_uuid = p_uuid; - if (path) { - *path = p; - p = NULL; - } - 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'; -} - -struct guid { - uint32_t u1; - uint16_t u2; - uint16_t u3; - uint8_t u4[8]; -} _packed_; - -static void id128_to_efi_guid(sd_id128_t id, void *guid) { - struct guid *uuid = guid; - - uuid->u1 = id.bytes[0] << 24 | id.bytes[1] << 16 | id.bytes[2] << 8 | id.bytes[3]; - uuid->u2 = id.bytes[4] << 8 | id.bytes[5]; - uuid->u3 = id.bytes[6] << 8 | id.bytes[7]; - memcpy(uuid->u4, id.bytes+8, sizeof(uuid->u4)); -} - -static uint16_t *tilt_slashes(uint16_t *s) { - uint16_t *p; - - for (p = s; *p; p++) - if (*p == '/') - *p = '\\'; - - return s; -} - -char *efi_tilt_backslashes(char *s) { - char *p; - - for (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) { - char boot_id[9]; - size_t size; - size_t title_len; - size_t path_len; - struct boot_option *option; - struct device_path *devicep; - _cleanup_free_ char *buf = NULL; - - title_len = (strlen(title)+1) * 2; - path_len = (strlen(path)+1) * 2; - - buf = calloc(sizeof(struct boot_option) + title_len + - sizeof(struct drive_path) + - sizeof(struct device_path) + path_len, 1); - 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); - devicep->drive.part_nr = part; - devicep->drive.part_start = pstart; - devicep->drive.part_size = psize; - devicep->drive.signature_type = SIGNATURE_TYPE_GUID; - devicep->drive.mbr_type = MBR_TYPE_EFI_PARTITION_TABLE_HEADER; - id128_to_efi_guid(part_uuid, devicep->drive.signature); - 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(boot_id, "Boot%04X", id); - return efi_set_variable(EFI_VENDOR_GLOBAL, boot_id, buf, size); -} - -int efi_remove_boot_option(uint16_t id) { - char boot_id[9]; - - xsprintf(boot_id, "Boot%04X", id); - return efi_set_variable(EFI_VENDOR_GLOBAL, boot_id, NULL, 0); -} - -int efi_get_boot_order(uint16_t **order) { - _cleanup_free_ void *buf = NULL; - size_t l; - int r; - - r = efi_get_variable(EFI_VENDOR_GLOBAL, "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 = buf; - buf = NULL; - return (int) (l / sizeof(uint16_t)); -} - -int efi_set_boot_order(uint16_t *order, size_t n) { - return efi_set_variable(EFI_VENDOR_GLOBAL, "BootOrder", order, n * sizeof(uint16_t)); -} - -static int boot_id_hex(const char s[4]) { - int i; - int id = 0; - - for (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 void *_a, const void *_b) { - const uint16_t *a = _a, *b = _b; - - return (int)*a - (int)*b; -} - -int efi_get_boot_options(uint16_t **options) { - _cleanup_closedir_ DIR *dir = NULL; - struct dirent *de; - _cleanup_free_ uint16_t *list = NULL; - size_t alloc = 0; - int count = 0; - - assert(options); - - dir = opendir("/sys/firmware/efi/efivars/"); - 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, "-8be4df61-93ca-11d2-aa0d-00e098032b8c") != 0) - continue; - - id = boot_id_hex(de->d_name + 4); - if (id < 0) - continue; - - if (!GREEDY_REALLOC(list, alloc, count + 1)) - return -ENOMEM; - - list[count++] = id; - } - - qsort_safe(list, count, sizeof(uint16_t), cmp_uint16); - - *options = list; - list = NULL; - return count; -} - -static int read_usec(sd_id128_t vendor, const char *name, usec_t *u) { - _cleanup_free_ char *j = NULL; - int r; - uint64_t x = 0; - - assert(name); - assert(u); - - r = efi_get_variable_string(EFI_VENDOR_LOADER, name, &j); - if (r < 0) - return r; - - r = safe_atou64(j, &x); - if (r < 0) - return r; - - *u = x; - return 0; -} - -int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader) { - uint64_t x, y; - int r; - - assert(firmware); - assert(loader); - - r = read_usec(EFI_VENDOR_LOADER, "LoaderTimeInitUSec", &x); - if (r < 0) - return r; - - r = read_usec(EFI_VENDOR_LOADER, "LoaderTimeExecUSec", &y); - if (r < 0) - return r; - - if (y == 0 || y < x) - return -EIO; - - if (y > USEC_PER_HOUR) - return -EIO; - - *firmware = x; - *loader = y; - - return 0; -} - -int efi_loader_get_device_part_uuid(sd_id128_t *u) { - _cleanup_free_ char *p = NULL; - int r, parsed[16]; - - r = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderDevicePartUUID", &p); - if (r < 0) - return r; - - if (sscanf(p, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", - &parsed[0], &parsed[1], &parsed[2], &parsed[3], - &parsed[4], &parsed[5], &parsed[6], &parsed[7], - &parsed[8], &parsed[9], &parsed[10], &parsed[11], - &parsed[12], &parsed[13], &parsed[14], &parsed[15]) != 16) - return -EIO; - - if (u) { - unsigned i; - - for (i = 0; i < ELEMENTSOF(parsed); i++) - u->bytes[i] = parsed[i]; - } - - return 0; -} - -#endif diff --git a/src/shared/efivars.h b/src/shared/efivars.h deleted file mode 100644 index 2492893718..0000000000 --- a/src/shared/efivars.h +++ /dev/null @@ -1,53 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -#pragma once - -/*** - This file is part of systemd. - - Copyright 2013 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <stdbool.h> - -#include "sd-id128.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_GLOBAL SD_ID128_MAKE(8b,e4,df,61,93,ca,11,d2,aa,0d,00,e0,98,03,2b,8c) -#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 -#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 -#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 - -bool is_efi_boot(void); -int is_efi_secure_boot(void); -int is_efi_secure_boot_setup_mode(void); - -int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size); -int efi_set_variable(sd_id128_t vendor, const char *name, const void *value, size_t size); -int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p); - -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); - -int efi_loader_get_device_part_uuid(sd_id128_t *u); -int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader); - -char *efi_tilt_backslashes(char *s); |