2017-11-18 17:09:20 +01:00
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/* SPDX-License-Identifier: LGPL-2.1+ */
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2013-01-19 04:20:23 +01:00
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2015-12-03 21:13:37 +01:00
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#include <dirent.h>
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#include <errno.h>
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2013-01-19 04:20:23 +01:00
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#include <fcntl.h>
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2015-12-03 21:13:37 +01:00
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#include <limits.h>
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2018-06-25 20:12:00 +02:00
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#include <linux/fs.h>
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2015-12-03 21:13:37 +01:00
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#include <stdio.h>
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#include <stdlib.h>
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2015-11-16 22:09:36 +01:00
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#include <string.h>
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2015-12-03 21:13:37 +01:00
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#include <sys/stat.h>
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2015-11-16 22:09:36 +01:00
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#include <unistd.h>
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2013-01-19 04:20:23 +01:00
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2015-12-03 21:13:37 +01:00
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#include "sd-id128.h"
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2015-10-27 03:01:06 +01:00
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#include "alloc-util.h"
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2018-06-25 20:12:00 +02:00
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#include "chattr-util.h"
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2015-10-26 20:07:55 +01:00
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#include "dirent-util.h"
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2015-10-25 13:14:12 +01:00
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#include "efivars.h"
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#include "fd-util.h"
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2015-10-25 14:08:25 +01:00
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#include "io-util.h"
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2015-12-03 21:13:37 +01:00
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#include "macro.h"
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2015-10-26 16:18:16 +01:00
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#include "parse-util.h"
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2019-03-13 12:14:47 +01:00
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#include "sort-util.h"
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2015-10-27 01:26:31 +01:00
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#include "stdio-util.h"
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2018-06-25 21:09:37 +02:00
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#include "strv.h"
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2015-12-03 21:13:37 +01:00
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#include "time-util.h"
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2013-01-19 04:20:23 +01:00
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#include "utf8.h"
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2015-04-03 18:03:06 +02:00
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#include "virt.h"
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2013-01-19 04:20:23 +01:00
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2017-10-03 10:41:51 +02:00
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#if ENABLE_EFI
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2013-02-13 23:07:59 +01:00
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2015-02-08 17:18:30 +01:00
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#define LOAD_OPTION_ACTIVE 0x00000001
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#define MEDIA_DEVICE_PATH 0x04
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#define MEDIA_HARDDRIVE_DP 0x01
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#define MEDIA_FILEPATH_DP 0x04
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#define SIGNATURE_TYPE_GUID 0x02
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#define MBR_TYPE_EFI_PARTITION_TABLE_HEADER 0x02
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#define END_DEVICE_PATH_TYPE 0x7f
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#define END_ENTIRE_DEVICE_PATH_SUBTYPE 0xff
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2015-04-03 18:03:06 +02:00
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#define EFI_OS_INDICATIONS_BOOT_TO_FW_UI 0x0000000000000001
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2015-02-08 17:18:30 +01:00
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2019-02-05 17:05:56 +01:00
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#define boot_option__contents { \
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uint32_t attr; \
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uint16_t path_len; \
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uint16_t title[]; \
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}
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struct boot_option boot_option__contents;
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struct boot_option__packed boot_option__contents _packed_;
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assert_cc(offsetof(struct boot_option, title) == offsetof(struct boot_option__packed, title));
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/* sizeof(struct boot_option) != sizeof(struct boot_option__packed), so
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* the *size* of the structure should not be used anywhere below. */
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2015-02-08 17:18:30 +01:00
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struct drive_path {
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uint32_t part_nr;
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uint64_t part_start;
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uint64_t part_size;
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char signature[16];
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uint8_t mbr_type;
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uint8_t signature_type;
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2015-03-09 00:07:44 +01:00
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} _packed_;
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2015-02-08 17:18:30 +01:00
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2019-02-05 17:35:39 +01:00
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#define device_path__contents { \
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uint8_t type; \
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uint8_t sub_type; \
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uint16_t length; \
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union { \
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uint16_t path[0]; \
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struct drive_path drive; \
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}; \
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}
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struct device_path device_path__contents;
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struct device_path__packed device_path__contents _packed_;
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assert_cc(sizeof(struct device_path) == sizeof(struct device_path__packed));
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2015-02-08 17:18:30 +01:00
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2013-02-13 00:07:55 +01:00
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bool is_efi_boot(void) {
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2018-06-22 18:40:43 +02:00
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if (detect_container() > 0)
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return false;
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return access("/sys/firmware/efi/", F_OK) >= 0;
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2013-01-19 04:41:33 +01:00
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}
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2013-03-10 22:47:56 +01:00
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static int read_flag(const char *varname) {
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2013-10-12 18:15:49 +02:00
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_cleanup_free_ void *v = NULL;
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2013-03-10 22:47:56 +01:00
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uint8_t b;
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2017-11-23 22:05:34 +01:00
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size_t s;
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int r;
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2013-03-10 22:47:56 +01:00
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2018-06-22 18:47:37 +02:00
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if (!is_efi_boot()) /* If this is not an EFI boot, assume the queried flags are zero */
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return 0;
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2013-03-10 22:47:56 +01:00
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r = efi_get_variable(EFI_VENDOR_GLOBAL, varname, NULL, &v, &s);
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if (r < 0)
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return r;
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2013-10-12 18:15:49 +02:00
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if (s != 1)
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return -EINVAL;
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2013-03-10 22:47:56 +01:00
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b = *(uint8_t *)v;
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2018-06-22 18:49:47 +02:00
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return !!b;
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2013-03-10 22:47:56 +01:00
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}
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2015-04-10 19:43:36 +02:00
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bool is_efi_secure_boot(void) {
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return read_flag("SecureBoot") > 0;
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2013-03-10 22:47:56 +01:00
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}
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2015-04-10 19:43:36 +02:00
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bool is_efi_secure_boot_setup_mode(void) {
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return read_flag("SetupMode") > 0;
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2013-03-10 22:47:56 +01:00
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}
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2015-04-03 18:03:06 +02:00
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int efi_reboot_to_firmware_supported(void) {
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_cleanup_free_ void *v = NULL;
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2017-11-23 22:05:34 +01:00
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uint64_t b;
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size_t s;
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int r;
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2015-04-03 18:03:06 +02:00
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2018-06-22 18:40:43 +02:00
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if (!is_efi_boot())
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2015-04-03 18:03:06 +02:00
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return -EOPNOTSUPP;
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r = efi_get_variable(EFI_VENDOR_GLOBAL, "OsIndicationsSupported", NULL, &v, &s);
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2017-11-23 22:05:46 +01:00
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if (r == -ENOENT) /* variable doesn't exist? it's not supported then */
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return -EOPNOTSUPP;
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2015-04-03 18:03:06 +02:00
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if (r < 0)
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return r;
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2017-11-23 22:05:34 +01:00
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if (s != sizeof(uint64_t))
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2015-04-03 18:03:06 +02:00
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return -EINVAL;
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2017-11-23 22:05:34 +01:00
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b = *(uint64_t*) v;
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if (!(b & EFI_OS_INDICATIONS_BOOT_TO_FW_UI))
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return -EOPNOTSUPP; /* bit unset? it's not supported then */
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return 0;
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2015-04-03 18:03:06 +02:00
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}
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static int get_os_indications(uint64_t *os_indication) {
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_cleanup_free_ void *v = NULL;
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2017-11-23 22:05:34 +01:00
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size_t s;
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int r;
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2015-04-03 18:03:06 +02:00
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2018-06-22 18:49:47 +02:00
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/* Let's verify general support first */
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2015-04-03 18:03:06 +02:00
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r = efi_reboot_to_firmware_supported();
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if (r < 0)
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return r;
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r = efi_get_variable(EFI_VENDOR_GLOBAL, "OsIndications", NULL, &v, &s);
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2015-07-11 22:29:48 +02:00
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if (r == -ENOENT) {
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2018-06-22 18:49:47 +02:00
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/* Some firmware implementations that do support OsIndications and report that with
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* OsIndicationsSupported will remove the OsIndications variable when it is unset. Let's pretend it's 0
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* then, to hide this implementation detail. Note that this call will return -ENOENT then only if the
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* support for OsIndications is missing entirely, as determined by efi_reboot_to_firmware_supported()
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* above. */
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2015-07-11 22:29:48 +02:00
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*os_indication = 0;
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return 0;
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} else if (r < 0)
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2015-04-03 18:03:06 +02:00
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return r;
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else if (s != sizeof(uint64_t))
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return -EINVAL;
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*os_indication = *(uint64_t *)v;
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return 0;
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}
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int efi_get_reboot_to_firmware(void) {
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int r;
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uint64_t b;
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r = get_os_indications(&b);
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if (r < 0)
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return r;
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return !!(b & EFI_OS_INDICATIONS_BOOT_TO_FW_UI);
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}
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int efi_set_reboot_to_firmware(bool value) {
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int r;
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uint64_t b, b_new;
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r = get_os_indications(&b);
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if (r < 0)
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return r;
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if (value)
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b_new = b | EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
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else
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b_new = b & ~EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
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/* Avoid writing to efi vars store if we can due to firmware bugs. */
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if (b != b_new)
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return efi_set_variable(EFI_VENDOR_GLOBAL, "OsIndications", &b_new, sizeof(uint64_t));
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return 0;
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}
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2019-04-04 22:07:17 +02:00
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char* efi_variable_path(sd_id128_t vendor, const char *name) {
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char *p;
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if (asprintf(&p,
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"/sys/firmware/efi/efivars/%s-" SD_ID128_UUID_FORMAT_STR,
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name, SD_ID128_FORMAT_VAL(vendor)) < 0)
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return NULL;
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return p;
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}
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2013-02-13 00:07:55 +01:00
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int efi_get_variable(
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sd_id128_t vendor,
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const char *name,
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uint32_t *attribute,
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void **value,
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size_t *size) {
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2013-01-19 04:20:23 +01:00
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_cleanup_close_ int fd = -1;
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_cleanup_free_ char *p = NULL;
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uint32_t a;
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ssize_t n;
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struct stat st;
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2015-03-10 01:41:00 +01:00
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_cleanup_free_ void *buf = NULL;
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2013-01-19 04:20:23 +01:00
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assert(name);
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assert(value);
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assert(size);
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2019-04-04 22:07:17 +02:00
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p = efi_variable_path(vendor, name);
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if (!p)
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2013-01-19 04:20:23 +01:00
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return -ENOMEM;
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fd = open(p, O_RDONLY|O_NOCTTY|O_CLOEXEC);
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if (fd < 0)
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return -errno;
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if (fstat(fd, &st) < 0)
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return -errno;
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if (st.st_size < 4)
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2019-03-06 22:45:37 +01:00
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return -ENODATA;
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2013-01-19 04:20:23 +01:00
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if (st.st_size > 4*1024*1024 + 4)
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return -E2BIG;
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n = read(fd, &a, sizeof(a));
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if (n < 0)
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2013-02-13 00:07:55 +01:00
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return -errno;
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2013-01-19 04:20:23 +01:00
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if (n != sizeof(a))
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return -EIO;
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2015-03-09 21:04:42 +01:00
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buf = malloc(st.st_size - 4 + 2);
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if (!buf)
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2013-01-19 04:20:23 +01:00
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return -ENOMEM;
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2015-03-09 21:04:42 +01:00
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n = read(fd, buf, (size_t) st.st_size - 4);
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if (n < 0)
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2013-03-22 01:55:17 +01:00
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return -errno;
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2015-03-09 21:04:42 +01:00
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if (n != (ssize_t) st.st_size - 4)
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2013-01-19 04:20:23 +01:00
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return -EIO;
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/* Always NUL terminate (2 bytes, to protect UTF-16) */
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2015-03-09 21:04:42 +01:00
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((char*) buf)[st.st_size - 4] = 0;
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((char*) buf)[st.st_size - 4 + 1] = 0;
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2013-01-19 04:20:23 +01:00
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2018-03-22 16:53:26 +01:00
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*value = TAKE_PTR(buf);
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2013-02-11 06:20:55 +01:00
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*size = (size_t) st.st_size - 4;
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2013-01-19 04:20:23 +01:00
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if (attribute)
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*attribute = a;
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return 0;
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}
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2018-10-22 19:58:26 +02:00
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int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p) {
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_cleanup_free_ void *s = NULL;
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size_t ss = 0;
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int r;
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|
|
|
|
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;
|
|
|
|
|
}
|
|
|
|
|
|
2015-02-08 17:18:30 +01:00
|
|
|
|
int efi_set_variable(
|
|
|
|
|
sd_id128_t vendor,
|
|
|
|
|
const char *name,
|
|
|
|
|
const void *value,
|
|
|
|
|
size_t size) {
|
|
|
|
|
|
|
|
|
|
struct var {
|
|
|
|
|
uint32_t attr;
|
|
|
|
|
char buf[];
|
2015-03-09 20:54:39 +01:00
|
|
|
|
} _packed_ * _cleanup_free_ buf = NULL;
|
|
|
|
|
_cleanup_free_ char *p = NULL;
|
|
|
|
|
_cleanup_close_ int fd = -1;
|
2018-06-25 20:12:00 +02:00
|
|
|
|
bool saved_flags_valid = false;
|
|
|
|
|
unsigned saved_flags;
|
|
|
|
|
int r;
|
2015-02-08 17:18:30 +01:00
|
|
|
|
|
|
|
|
|
assert(name);
|
2017-09-08 17:34:11 +02:00
|
|
|
|
assert(value || size == 0);
|
2015-02-08 17:18:30 +01:00
|
|
|
|
|
2019-04-04 22:07:17 +02:00
|
|
|
|
p = efi_variable_path(vendor, name);
|
|
|
|
|
if (!p)
|
2015-02-08 17:18:30 +01:00
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
2018-06-25 20:12:00 +02:00
|
|
|
|
/* Newer efivarfs protects variables that are not in a whitelist with FS_IMMUTABLE_FL by default, to protect
|
|
|
|
|
* them for accidental removal and modification. We are not changing these variables accidentally however,
|
|
|
|
|
* hence let's unset the bit first. */
|
|
|
|
|
|
|
|
|
|
r = chattr_path(p, 0, FS_IMMUTABLE_FL, &saved_flags);
|
|
|
|
|
if (r < 0 && r != -ENOENT)
|
|
|
|
|
log_debug_errno(r, "Failed to drop FS_IMMUTABLE_FL flag from '%s', ignoring: %m", p);
|
|
|
|
|
|
|
|
|
|
saved_flags_valid = r >= 0;
|
|
|
|
|
|
2015-02-08 17:18:30 +01:00
|
|
|
|
if (size == 0) {
|
2018-06-25 20:12:00 +02:00
|
|
|
|
if (unlink(p) < 0) {
|
|
|
|
|
r = -errno;
|
|
|
|
|
goto finish;
|
|
|
|
|
}
|
|
|
|
|
|
2015-03-09 20:54:39 +01:00
|
|
|
|
return 0;
|
2015-02-08 17:18:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fd = open(p, O_WRONLY|O_CREAT|O_NOCTTY|O_CLOEXEC, 0644);
|
2018-06-25 20:12:00 +02:00
|
|
|
|
if (fd < 0) {
|
|
|
|
|
r = -errno;
|
|
|
|
|
goto finish;
|
|
|
|
|
}
|
2015-02-08 17:18:30 +01:00
|
|
|
|
|
|
|
|
|
buf = malloc(sizeof(uint32_t) + size);
|
2018-06-25 20:12:00 +02:00
|
|
|
|
if (!buf) {
|
|
|
|
|
r = -ENOMEM;
|
|
|
|
|
goto finish;
|
|
|
|
|
}
|
2015-02-08 17:18:30 +01:00
|
|
|
|
|
|
|
|
|
buf->attr = EFI_VARIABLE_NON_VOLATILE|EFI_VARIABLE_BOOTSERVICE_ACCESS|EFI_VARIABLE_RUNTIME_ACCESS;
|
|
|
|
|
memcpy(buf->buf, value, size);
|
|
|
|
|
|
2018-06-25 20:12:00 +02:00
|
|
|
|
r = loop_write(fd, buf, sizeof(uint32_t) + size, false);
|
|
|
|
|
if (r < 0)
|
|
|
|
|
goto finish;
|
|
|
|
|
|
|
|
|
|
r = 0;
|
|
|
|
|
|
|
|
|
|
finish:
|
|
|
|
|
if (saved_flags_valid) {
|
|
|
|
|
int q;
|
|
|
|
|
|
|
|
|
|
/* Restore the original flags field, just in case */
|
|
|
|
|
if (fd < 0)
|
|
|
|
|
q = chattr_path(p, saved_flags, FS_IMMUTABLE_FL, NULL);
|
|
|
|
|
else
|
|
|
|
|
q = chattr_fd(fd, saved_flags, FS_IMMUTABLE_FL, NULL);
|
|
|
|
|
if (q < 0)
|
|
|
|
|
log_debug_errno(q, "Failed to restore FS_IMMUTABLE_FL on '%s', ignoring: %m", p);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return r;
|
2015-02-08 17:18:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
2018-10-22 19:58:26 +02:00
|
|
|
|
int efi_set_variable_string(sd_id128_t vendor, const char *name, const char *v) {
|
|
|
|
|
_cleanup_free_ char16_t *u16 = NULL;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
|
2018-10-22 19:58:26 +02:00
|
|
|
|
u16 = utf8_to_utf16(v, strlen(v));
|
|
|
|
|
if (!u16)
|
2013-02-13 00:07:55 +01:00
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
2018-10-22 19:58:26 +02:00
|
|
|
|
return efi_set_variable(vendor, name, u16, (char16_strlen(u16) + 1) * sizeof(char16_t));
|
2013-02-08 17:24:43 +01:00
|
|
|
|
}
|
|
|
|
|
|
2019-02-05 17:05:56 +01:00
|
|
|
|
static ssize_t utf16_size(const uint16_t *s, size_t buf_len_bytes) {
|
2013-02-08 17:24:43 +01:00
|
|
|
|
size_t l = 0;
|
|
|
|
|
|
2019-02-05 17:05:56 +01:00
|
|
|
|
/* 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);
|
2013-02-08 17:24:43 +01:00
|
|
|
|
l++;
|
2019-02-05 17:05:56 +01:00
|
|
|
|
}
|
2013-02-13 00:07:55 +01:00
|
|
|
|
|
2019-02-05 17:05:56 +01:00
|
|
|
|
return -EINVAL; /* The terminator was not found */
|
2013-02-08 17:24:43 +01:00
|
|
|
|
}
|
|
|
|
|
|
2019-02-05 17:35:39 +01:00
|
|
|
|
struct guid {
|
|
|
|
|
uint32_t u1;
|
|
|
|
|
uint16_t u2;
|
|
|
|
|
uint16_t u3;
|
|
|
|
|
uint8_t u4[8];
|
|
|
|
|
} _packed_;
|
|
|
|
|
|
2013-02-08 17:24:43 +01:00
|
|
|
|
static void efi_guid_to_id128(const void *guid, sd_id128_t *id128) {
|
2019-02-05 17:35:39 +01:00
|
|
|
|
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;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
memcpy(&id128->bytes[8], uuid->u4, sizeof(uuid->u4));
|
|
|
|
|
}
|
|
|
|
|
|
2013-02-13 00:07:55 +01:00
|
|
|
|
int efi_get_boot_option(
|
|
|
|
|
uint16_t id,
|
|
|
|
|
char **title,
|
|
|
|
|
sd_id128_t *part_uuid,
|
2015-02-08 17:18:30 +01:00
|
|
|
|
char **path,
|
|
|
|
|
bool *active) {
|
2013-02-08 17:24:43 +01:00
|
|
|
|
|
2013-02-13 00:07:55 +01:00
|
|
|
|
char boot_id[9];
|
|
|
|
|
_cleanup_free_ uint8_t *buf = NULL;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
size_t l;
|
|
|
|
|
struct boot_option *header;
|
2019-02-05 17:05:56 +01:00
|
|
|
|
ssize_t title_size;
|
2015-03-09 20:54:39 +01:00
|
|
|
|
_cleanup_free_ char *s = NULL, *p = NULL;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
sd_id128_t p_uuid = SD_ID128_NULL;
|
2015-03-09 20:55:24 +01:00
|
|
|
|
int r;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
|
2018-06-22 18:47:37 +02:00
|
|
|
|
if (!is_efi_boot())
|
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
2015-03-09 20:54:39 +01:00
|
|
|
|
xsprintf(boot_id, "Boot%04X", id);
|
2015-03-09 20:55:24 +01:00
|
|
|
|
r = efi_get_variable(EFI_VENDOR_GLOBAL, boot_id, NULL, (void **)&buf, &l);
|
|
|
|
|
if (r < 0)
|
|
|
|
|
return r;
|
2019-02-05 17:05:56 +01:00
|
|
|
|
if (l < offsetof(struct boot_option, title))
|
2013-02-08 17:24:43 +01:00
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
|
|
header = (struct boot_option *)buf;
|
2019-02-05 17:05:56 +01:00
|
|
|
|
title_size = utf16_size(header->title, l - offsetof(struct boot_option, title));
|
|
|
|
|
if (title_size < 0)
|
|
|
|
|
return title_size;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
|
2013-04-03 22:32:01 +02:00
|
|
|
|
if (title) {
|
|
|
|
|
s = utf16_to_utf8(header->title, title_size);
|
2015-03-09 20:54:39 +01:00
|
|
|
|
if (!s)
|
|
|
|
|
return -ENOMEM;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (header->path_len > 0) {
|
2013-02-13 00:07:55 +01:00
|
|
|
|
uint8_t *dbuf;
|
2018-10-10 14:54:05 +02:00
|
|
|
|
size_t dnext, doff;
|
|
|
|
|
|
|
|
|
|
doff = offsetof(struct boot_option, title) + title_size;
|
|
|
|
|
dbuf = buf + doff;
|
|
|
|
|
if (header->path_len > l - doff)
|
|
|
|
|
return -EINVAL;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
|
|
|
|
|
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 */
|
2015-02-08 17:18:30 +01:00
|
|
|
|
if (dpath->type == END_DEVICE_PATH_TYPE && dpath->sub_type == END_ENTIRE_DEVICE_PATH_SUBTYPE)
|
2013-02-08 17:24:43 +01:00
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
dnext += dpath->length;
|
|
|
|
|
|
|
|
|
|
/* Type 0x04 – Media Device Path */
|
2015-02-08 17:18:30 +01:00
|
|
|
|
if (dpath->type != MEDIA_DEVICE_PATH)
|
2013-02-08 17:24:43 +01:00
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
/* Sub-Type 1 – Hard Drive */
|
2015-02-08 17:18:30 +01:00
|
|
|
|
if (dpath->sub_type == MEDIA_HARDDRIVE_DP) {
|
2013-02-08 17:24:43 +01:00
|
|
|
|
/* 0x02 – GUID Partition Table */
|
2015-02-08 17:18:30 +01:00
|
|
|
|
if (dpath->drive.mbr_type != MBR_TYPE_EFI_PARTITION_TABLE_HEADER)
|
2013-02-08 17:24:43 +01:00
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
/* 0x02 – GUID signature */
|
2015-02-08 17:18:30 +01:00
|
|
|
|
if (dpath->drive.signature_type != SIGNATURE_TYPE_GUID)
|
2013-02-08 17:24:43 +01:00
|
|
|
|
continue;
|
|
|
|
|
|
2013-04-03 22:32:01 +02:00
|
|
|
|
if (part_uuid)
|
|
|
|
|
efi_guid_to_id128(dpath->drive.signature, &p_uuid);
|
2013-02-08 17:24:43 +01:00
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Sub-Type 4 – File Path */
|
2015-02-08 17:18:30 +01:00
|
|
|
|
if (dpath->sub_type == MEDIA_FILEPATH_DP && !p && path) {
|
2013-02-08 17:24:43 +01:00
|
|
|
|
p = utf16_to_utf8(dpath->path, dpath->length-4);
|
2018-10-12 18:50:46 +02:00
|
|
|
|
if (!p)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
2015-02-08 17:18:30 +01:00
|
|
|
|
efi_tilt_backslashes(p);
|
2013-02-08 17:24:43 +01:00
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2018-04-05 07:26:26 +02:00
|
|
|
|
if (title)
|
|
|
|
|
*title = TAKE_PTR(s);
|
2013-02-08 17:24:43 +01:00
|
|
|
|
if (part_uuid)
|
|
|
|
|
*part_uuid = p_uuid;
|
2018-04-05 07:26:26 +02:00
|
|
|
|
if (path)
|
|
|
|
|
*path = TAKE_PTR(p);
|
2015-02-08 17:18:30 +01:00
|
|
|
|
if (active)
|
2015-03-09 20:57:56 +01:00
|
|
|
|
*active = !!(header->attr & LOAD_OPTION_ACTIVE);
|
2013-02-13 00:07:55 +01:00
|
|
|
|
|
2013-02-08 17:24:43 +01:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2015-02-08 17:18:30 +01:00
|
|
|
|
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) {
|
2019-02-05 17:35:39 +01:00
|
|
|
|
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));
|
2015-02-08 17:18:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static uint16_t *tilt_slashes(uint16_t *s) {
|
|
|
|
|
uint16_t *p;
|
|
|
|
|
|
|
|
|
|
for (p = s; *p; p++)
|
|
|
|
|
if (*p == '/')
|
|
|
|
|
*p = '\\';
|
|
|
|
|
|
|
|
|
|
return s;
|
|
|
|
|
}
|
|
|
|
|
|
2018-06-22 18:47:37 +02:00
|
|
|
|
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;
|
2015-02-08 17:18:30 +01:00
|
|
|
|
struct boot_option *option;
|
|
|
|
|
struct device_path *devicep;
|
2018-06-22 18:47:37 +02:00
|
|
|
|
char boot_id[9];
|
|
|
|
|
|
|
|
|
|
if (!is_efi_boot())
|
|
|
|
|
return -EOPNOTSUPP;
|
2015-02-08 17:18:30 +01:00
|
|
|
|
|
|
|
|
|
title_len = (strlen(title)+1) * 2;
|
|
|
|
|
path_len = (strlen(path)+1) * 2;
|
|
|
|
|
|
2019-02-05 17:05:56 +01:00
|
|
|
|
buf = malloc0(offsetof(struct boot_option, title) + title_len +
|
2018-06-22 18:49:47 +02:00
|
|
|
|
sizeof(struct drive_path) +
|
|
|
|
|
sizeof(struct device_path) + path_len);
|
2015-03-09 20:54:39 +01:00
|
|
|
|
if (!buf)
|
|
|
|
|
return -ENOMEM;
|
2015-02-08 17:18:30 +01:00
|
|
|
|
|
|
|
|
|
/* 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);
|
2019-02-05 17:35:39 +01:00
|
|
|
|
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));
|
2015-02-08 17:18:30 +01:00
|
|
|
|
id128_to_efi_guid(part_uuid, devicep->drive.signature);
|
2019-02-05 17:35:39 +01:00
|
|
|
|
devicep->drive.mbr_type = MBR_TYPE_EFI_PARTITION_TABLE_HEADER;
|
|
|
|
|
devicep->drive.signature_type = SIGNATURE_TYPE_GUID;
|
2015-02-08 17:18:30 +01:00
|
|
|
|
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;
|
|
|
|
|
|
2015-03-09 20:54:39 +01:00
|
|
|
|
xsprintf(boot_id, "Boot%04X", id);
|
|
|
|
|
return efi_set_variable(EFI_VENDOR_GLOBAL, boot_id, buf, size);
|
2015-02-08 17:18:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int efi_remove_boot_option(uint16_t id) {
|
|
|
|
|
char boot_id[9];
|
|
|
|
|
|
2018-06-22 18:47:37 +02:00
|
|
|
|
if (!is_efi_boot())
|
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
2015-03-09 20:54:39 +01:00
|
|
|
|
xsprintf(boot_id, "Boot%04X", id);
|
2015-02-08 17:18:30 +01:00
|
|
|
|
return efi_set_variable(EFI_VENDOR_GLOBAL, boot_id, NULL, 0);
|
|
|
|
|
}
|
|
|
|
|
|
2013-02-13 00:07:55 +01:00
|
|
|
|
int efi_get_boot_order(uint16_t **order) {
|
2015-03-09 21:04:42 +01:00
|
|
|
|
_cleanup_free_ void *buf = NULL;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
size_t l;
|
2013-02-13 00:07:55 +01:00
|
|
|
|
int r;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
|
2018-06-22 18:47:37 +02:00
|
|
|
|
if (!is_efi_boot())
|
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
2013-02-13 00:07:55 +01:00
|
|
|
|
r = efi_get_variable(EFI_VENDOR_GLOBAL, "BootOrder", NULL, &buf, &l);
|
|
|
|
|
if (r < 0)
|
|
|
|
|
return r;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
|
2015-03-09 21:04:42 +01:00
|
|
|
|
if (l <= 0)
|
2013-02-08 17:24:43 +01:00
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
2015-03-09 21:04:42 +01:00
|
|
|
|
if (l % sizeof(uint16_t) > 0 ||
|
|
|
|
|
l / sizeof(uint16_t) > INT_MAX)
|
2013-02-08 17:24:43 +01:00
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
2018-03-22 16:53:26 +01:00
|
|
|
|
*order = TAKE_PTR(buf);
|
2013-02-13 00:07:55 +01:00
|
|
|
|
return (int) (l / sizeof(uint16_t));
|
|
|
|
|
}
|
|
|
|
|
|
2015-02-08 17:18:30 +01:00
|
|
|
|
int efi_set_boot_order(uint16_t *order, size_t n) {
|
2018-06-22 18:47:37 +02:00
|
|
|
|
|
|
|
|
|
if (!is_efi_boot())
|
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
2015-02-08 17:18:30 +01:00
|
|
|
|
return efi_set_variable(EFI_VENDOR_GLOBAL, "BootOrder", order, n * sizeof(uint16_t));
|
|
|
|
|
}
|
|
|
|
|
|
2019-01-04 12:30:45 +01:00
|
|
|
|
static int boot_id_hex(const char s[static 4]) {
|
2018-06-22 18:49:47 +02:00
|
|
|
|
int id = 0, i;
|
2013-02-13 17:34:57 +01:00
|
|
|
|
|
|
|
|
|
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
|
2014-08-11 18:35:54 +02:00
|
|
|
|
return -EINVAL;
|
2013-02-13 17:34:57 +01:00
|
|
|
|
|
|
|
|
|
return id;
|
|
|
|
|
}
|
|
|
|
|
|
2018-09-18 01:39:24 +02:00
|
|
|
|
static int cmp_uint16(const uint16_t *a, const uint16_t *b) {
|
|
|
|
|
return CMP(*a, *b);
|
2013-02-13 22:02:40 +01:00
|
|
|
|
}
|
|
|
|
|
|
2013-02-13 00:07:55 +01:00
|
|
|
|
int efi_get_boot_options(uint16_t **options) {
|
|
|
|
|
_cleanup_closedir_ DIR *dir = NULL;
|
2015-03-09 20:54:39 +01:00
|
|
|
|
_cleanup_free_ uint16_t *list = NULL;
|
2018-06-22 18:49:47 +02:00
|
|
|
|
struct dirent *de;
|
2015-03-09 21:09:16 +01:00
|
|
|
|
size_t alloc = 0;
|
2015-03-09 20:54:39 +01:00
|
|
|
|
int count = 0;
|
2013-02-13 00:07:55 +01:00
|
|
|
|
|
|
|
|
|
assert(options);
|
|
|
|
|
|
2018-06-22 18:47:37 +02:00
|
|
|
|
if (!is_efi_boot())
|
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
2013-02-13 00:07:55 +01:00
|
|
|
|
dir = opendir("/sys/firmware/efi/efivars/");
|
|
|
|
|
if (!dir)
|
|
|
|
|
return -errno;
|
|
|
|
|
|
2015-03-09 20:54:39 +01:00
|
|
|
|
FOREACH_DIRENT(de, dir, return -errno) {
|
2013-02-13 17:34:57 +01:00
|
|
|
|
int id;
|
2013-02-13 00:07:55 +01:00
|
|
|
|
|
|
|
|
|
if (strncmp(de->d_name, "Boot", 4) != 0)
|
|
|
|
|
continue;
|
|
|
|
|
|
2013-02-13 17:34:57 +01:00
|
|
|
|
if (strlen(de->d_name) != 45)
|
2013-02-13 00:07:55 +01:00
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
if (strcmp(de->d_name + 8, "-8be4df61-93ca-11d2-aa0d-00e098032b8c") != 0)
|
|
|
|
|
continue;
|
|
|
|
|
|
2013-02-13 17:34:57 +01:00
|
|
|
|
id = boot_id_hex(de->d_name + 4);
|
|
|
|
|
if (id < 0)
|
2013-02-13 00:07:55 +01:00
|
|
|
|
continue;
|
|
|
|
|
|
2015-03-09 21:09:16 +01:00
|
|
|
|
if (!GREEDY_REALLOC(list, alloc, count + 1))
|
2015-03-09 20:54:39 +01:00
|
|
|
|
return -ENOMEM;
|
2013-02-13 00:07:55 +01:00
|
|
|
|
|
2015-03-09 21:09:16 +01:00
|
|
|
|
list[count++] = id;
|
2013-02-13 00:07:55 +01:00
|
|
|
|
}
|
|
|
|
|
|
2018-09-18 01:39:24 +02:00
|
|
|
|
typesafe_qsort(list, count, cmp_uint16);
|
2013-02-13 22:02:40 +01:00
|
|
|
|
|
2018-04-05 07:26:26 +02:00
|
|
|
|
*options = TAKE_PTR(list);
|
|
|
|
|
|
2013-02-13 00:07:55 +01:00
|
|
|
|
return count;
|
2013-02-08 17:24:43 +01:00
|
|
|
|
}
|
|
|
|
|
|
2013-01-23 02:16:11 +01:00
|
|
|
|
static int read_usec(sd_id128_t vendor, const char *name, usec_t *u) {
|
2013-01-19 04:20:23 +01:00
|
|
|
|
_cleanup_free_ char *j = NULL;
|
|
|
|
|
int r;
|
2014-02-19 17:47:11 +01:00
|
|
|
|
uint64_t x = 0;
|
2013-01-19 04:20:23 +01:00
|
|
|
|
|
|
|
|
|
assert(name);
|
|
|
|
|
assert(u);
|
|
|
|
|
|
2013-02-13 21:24:10 +01:00
|
|
|
|
r = efi_get_variable_string(EFI_VENDOR_LOADER, name, &j);
|
2013-01-19 04:20:23 +01:00
|
|
|
|
if (r < 0)
|
|
|
|
|
return r;
|
|
|
|
|
|
|
|
|
|
r = safe_atou64(j, &x);
|
|
|
|
|
if (r < 0)
|
|
|
|
|
return r;
|
|
|
|
|
|
2013-01-23 02:16:11 +01:00
|
|
|
|
*u = x;
|
2013-01-19 04:20:23 +01:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2013-09-24 00:23:35 +02:00
|
|
|
|
int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader) {
|
2013-01-19 04:20:23 +01:00
|
|
|
|
uint64_t x, y;
|
|
|
|
|
int r;
|
|
|
|
|
|
|
|
|
|
assert(firmware);
|
|
|
|
|
assert(loader);
|
|
|
|
|
|
2018-06-22 18:47:37 +02:00
|
|
|
|
if (!is_efi_boot())
|
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
2013-01-24 10:32:21 +01:00
|
|
|
|
r = read_usec(EFI_VENDOR_LOADER, "LoaderTimeInitUSec", &x);
|
2013-01-19 04:20:23 +01:00
|
|
|
|
if (r < 0)
|
|
|
|
|
return r;
|
|
|
|
|
|
2013-01-24 10:32:21 +01:00
|
|
|
|
r = read_usec(EFI_VENDOR_LOADER, "LoaderTimeExecUSec", &y);
|
2013-01-19 04:20:23 +01:00
|
|
|
|
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;
|
|
|
|
|
}
|
|
|
|
|
|
2013-09-24 00:23:35 +02:00
|
|
|
|
int efi_loader_get_device_part_uuid(sd_id128_t *u) {
|
2013-01-21 01:02:53 +01:00
|
|
|
|
_cleanup_free_ char *p = NULL;
|
|
|
|
|
int r, parsed[16];
|
|
|
|
|
|
2018-06-22 18:47:37 +02:00
|
|
|
|
if (!is_efi_boot())
|
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
2013-02-13 21:24:10 +01:00
|
|
|
|
r = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderDevicePartUUID", &p);
|
2013-01-21 01:02:53 +01:00
|
|
|
|
if (r < 0)
|
|
|
|
|
return r;
|
|
|
|
|
|
2019-04-05 12:13:44 +02:00
|
|
|
|
if (sscanf(p, SD_ID128_UUID_FORMAT_STR,
|
2013-01-21 01:02:53 +01:00
|
|
|
|
&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;
|
|
|
|
|
|
2014-03-07 04:31:26 +01:00
|
|
|
|
if (u) {
|
|
|
|
|
unsigned i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ELEMENTSOF(parsed); i++)
|
|
|
|
|
u->bytes[i] = parsed[i];
|
|
|
|
|
}
|
2013-01-21 01:02:53 +01:00
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
2013-02-13 23:07:59 +01:00
|
|
|
|
|
2018-06-25 21:09:37 +02:00
|
|
|
|
int efi_loader_get_entries(char ***ret) {
|
|
|
|
|
_cleanup_free_ char16_t *entries = NULL;
|
|
|
|
|
_cleanup_strv_free_ char **l = NULL;
|
|
|
|
|
size_t size, i, start;
|
|
|
|
|
int r;
|
|
|
|
|
|
|
|
|
|
assert(ret);
|
|
|
|
|
|
|
|
|
|
if (!is_efi_boot())
|
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
|
|
|
|
r = efi_get_variable(EFI_VENDOR_LOADER, "LoaderEntries", NULL, (void**) &entries, &size);
|
|
|
|
|
if (r < 0)
|
|
|
|
|
return r;
|
|
|
|
|
|
|
|
|
|
/* The variable contains a series of individually NUL terminated UTF-16 strings. */
|
|
|
|
|
|
|
|
|
|
for (i = 0, start = 0;; i++) {
|
2018-10-22 19:59:45 +02:00
|
|
|
|
_cleanup_free_ char *decoded = NULL;
|
2018-06-25 21:09:37 +02:00
|
|
|
|
bool end;
|
|
|
|
|
|
|
|
|
|
/* Is this the end of the variable's data? */
|
|
|
|
|
end = i * sizeof(char16_t) >= size;
|
|
|
|
|
|
|
|
|
|
/* Are we in the middle of a string? (i.e. not at the end of the variable, nor at a NUL terminator?) If
|
|
|
|
|
* so, let's go to the next entry. */
|
|
|
|
|
if (!end && entries[i] != 0)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
/* We reached the end of a string, let's decode it into UTF-8 */
|
|
|
|
|
decoded = utf16_to_utf8(entries + start, (i - start) * sizeof(char16_t));
|
|
|
|
|
if (!decoded)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
2018-10-22 19:59:45 +02:00
|
|
|
|
if (efi_loader_entry_name_valid(decoded)) {
|
|
|
|
|
r = strv_consume(&l, TAKE_PTR(decoded));
|
|
|
|
|
if (r < 0)
|
|
|
|
|
return r;
|
|
|
|
|
} else
|
|
|
|
|
log_debug("Ignoring invalid loader entry '%s'.", decoded);
|
2018-06-25 21:09:37 +02:00
|
|
|
|
|
|
|
|
|
/* We reached the end of the variable */
|
|
|
|
|
if (end)
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* Continue after the NUL byte */
|
|
|
|
|
start = i + 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
*ret = TAKE_PTR(l);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2018-10-22 16:52:57 +02:00
|
|
|
|
int efi_loader_get_features(uint64_t *ret) {
|
|
|
|
|
_cleanup_free_ void *v = NULL;
|
|
|
|
|
size_t s;
|
|
|
|
|
int r;
|
|
|
|
|
|
|
|
|
|
if (!is_efi_boot()) {
|
|
|
|
|
*ret = 0;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
r = efi_get_variable(EFI_VENDOR_LOADER, "LoaderFeatures", NULL, &v, &s);
|
|
|
|
|
if (r == -ENOENT) {
|
|
|
|
|
_cleanup_free_ char *info = NULL;
|
|
|
|
|
|
|
|
|
|
/* The new (v240+) LoaderFeatures variable is not supported, let's see if it's systemd-boot at all */
|
|
|
|
|
r = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderInfo", &info);
|
|
|
|
|
if (r < 0) {
|
|
|
|
|
if (r != -ENOENT)
|
|
|
|
|
return r;
|
|
|
|
|
|
|
|
|
|
/* Variable not set, definitely means not systemd-boot */
|
|
|
|
|
|
|
|
|
|
} else if (first_word(info, "systemd-boot")) {
|
|
|
|
|
|
|
|
|
|
/* An older systemd-boot version. Let's hardcode the feature set, since it was pretty
|
|
|
|
|
* static in all its versions. */
|
|
|
|
|
|
|
|
|
|
*ret = EFI_LOADER_FEATURE_CONFIG_TIMEOUT |
|
|
|
|
|
EFI_LOADER_FEATURE_ENTRY_DEFAULT |
|
|
|
|
|
EFI_LOADER_FEATURE_ENTRY_ONESHOT;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* No features supported */
|
|
|
|
|
*ret = 0;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
if (r < 0)
|
|
|
|
|
return r;
|
|
|
|
|
|
2018-11-20 23:40:44 +01:00
|
|
|
|
if (s != sizeof(uint64_t))
|
|
|
|
|
return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
|
|
|
"LoaderFeatures EFI variable doesn't have the right size.");
|
2018-10-22 16:52:57 +02:00
|
|
|
|
|
|
|
|
|
memcpy(ret, v, sizeof(uint64_t));
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
2018-11-16 20:02:00 +01:00
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
2019-03-11 15:58:52 +01:00
|
|
|
|
bool efi_loader_entry_name_valid(const char *s) {
|
|
|
|
|
if (isempty(s))
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
if (strlen(s) > FILENAME_MAX) /* Make sure entry names fit in filenames */
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
return in_charset(s, ALPHANUMERICAL "-_.");
|
|
|
|
|
}
|
|
|
|
|
|
2018-11-16 20:02:00 +01:00
|
|
|
|
char *efi_tilt_backslashes(char *s) {
|
|
|
|
|
char *p;
|
|
|
|
|
|
|
|
|
|
for (p = s; *p; p++)
|
|
|
|
|
if (*p == '\\')
|
|
|
|
|
*p = '/';
|
|
|
|
|
|
|
|
|
|
return s;
|
|
|
|
|
}
|