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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2e3d0692 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2013 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
a8fbdf54 TA |
21 | #include <dirent.h> |
22 | #include <errno.h> | |
2e3d0692 | 23 | #include <fcntl.h> |
a8fbdf54 TA |
24 | #include <limits.h> |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
cf0fbc49 | 27 | #include <string.h> |
a8fbdf54 | 28 | #include <sys/stat.h> |
cf0fbc49 | 29 | #include <unistd.h> |
2e3d0692 | 30 | |
a8fbdf54 TA |
31 | #include "sd-id128.h" |
32 | ||
b5efdb8a | 33 | #include "alloc-util.h" |
a0956174 | 34 | #include "dirent-util.h" |
3ffd4af2 LP |
35 | #include "efivars.h" |
36 | #include "fd-util.h" | |
c004493c | 37 | #include "io-util.h" |
a8fbdf54 | 38 | #include "macro.h" |
6bedfcbb | 39 | #include "parse-util.h" |
15a5e950 | 40 | #include "stdio-util.h" |
a8fbdf54 | 41 | #include "time-util.h" |
2e3d0692 | 42 | #include "utf8.h" |
3ffd4af2 | 43 | #include "util.h" |
5bdf2243 | 44 | #include "virt.h" |
2e3d0692 | 45 | |
349cc4a5 | 46 | #if ENABLE_EFI |
b872e9a0 | 47 | |
0974a682 KS |
48 | #define LOAD_OPTION_ACTIVE 0x00000001 |
49 | #define MEDIA_DEVICE_PATH 0x04 | |
50 | #define MEDIA_HARDDRIVE_DP 0x01 | |
51 | #define MEDIA_FILEPATH_DP 0x04 | |
52 | #define SIGNATURE_TYPE_GUID 0x02 | |
53 | #define MBR_TYPE_EFI_PARTITION_TABLE_HEADER 0x02 | |
54 | #define END_DEVICE_PATH_TYPE 0x7f | |
55 | #define END_ENTIRE_DEVICE_PATH_SUBTYPE 0xff | |
5bdf2243 | 56 | #define EFI_OS_INDICATIONS_BOOT_TO_FW_UI 0x0000000000000001 |
0974a682 KS |
57 | |
58 | struct boot_option { | |
59 | uint32_t attr; | |
60 | uint16_t path_len; | |
61 | uint16_t title[]; | |
885fdebc | 62 | } _packed_; |
0974a682 KS |
63 | |
64 | struct drive_path { | |
65 | uint32_t part_nr; | |
66 | uint64_t part_start; | |
67 | uint64_t part_size; | |
68 | char signature[16]; | |
69 | uint8_t mbr_type; | |
70 | uint8_t signature_type; | |
885fdebc | 71 | } _packed_; |
0974a682 KS |
72 | |
73 | struct device_path { | |
74 | uint8_t type; | |
75 | uint8_t sub_type; | |
76 | uint16_t length; | |
77 | union { | |
78 | uint16_t path[0]; | |
79 | struct drive_path drive; | |
80 | }; | |
885fdebc | 81 | } _packed_; |
0974a682 | 82 | |
9cde64ff | 83 | bool is_efi_boot(void) { |
34e5a31e LP |
84 | return access("/sys/firmware/efi", F_OK) >= 0; |
85 | } | |
86 | ||
bc6f2e7c KS |
87 | static int read_flag(const char *varname) { |
88 | int r; | |
b47d419c | 89 | _cleanup_free_ void *v = NULL; |
bc6f2e7c KS |
90 | size_t s; |
91 | uint8_t b; | |
92 | ||
93 | r = efi_get_variable(EFI_VENDOR_GLOBAL, varname, NULL, &v, &s); | |
94 | if (r < 0) | |
95 | return r; | |
96 | ||
b47d419c ZJS |
97 | if (s != 1) |
98 | return -EINVAL; | |
bc6f2e7c KS |
99 | |
100 | b = *(uint8_t *)v; | |
101 | r = b > 0; | |
bc6f2e7c KS |
102 | return r; |
103 | } | |
104 | ||
9df49b33 TG |
105 | bool is_efi_secure_boot(void) { |
106 | return read_flag("SecureBoot") > 0; | |
bc6f2e7c KS |
107 | } |
108 | ||
9df49b33 TG |
109 | bool is_efi_secure_boot_setup_mode(void) { |
110 | return read_flag("SetupMode") > 0; | |
bc6f2e7c KS |
111 | } |
112 | ||
5bdf2243 JJ |
113 | int efi_reboot_to_firmware_supported(void) { |
114 | int r; | |
115 | size_t s; | |
116 | uint64_t b; | |
117 | _cleanup_free_ void *v = NULL; | |
118 | ||
75f86906 | 119 | if (!is_efi_boot() || detect_container() > 0) |
5bdf2243 JJ |
120 | return -EOPNOTSUPP; |
121 | ||
122 | r = efi_get_variable(EFI_VENDOR_GLOBAL, "OsIndicationsSupported", NULL, &v, &s); | |
123 | if (r < 0) | |
124 | return r; | |
125 | else if (s != sizeof(uint64_t)) | |
126 | return -EINVAL; | |
127 | ||
128 | b = *(uint64_t *)v; | |
129 | b &= EFI_OS_INDICATIONS_BOOT_TO_FW_UI; | |
130 | return b > 0 ? 0 : -EOPNOTSUPP; | |
131 | } | |
132 | ||
133 | static int get_os_indications(uint64_t *os_indication) { | |
134 | int r; | |
135 | size_t s; | |
136 | _cleanup_free_ void *v = NULL; | |
137 | ||
138 | r = efi_reboot_to_firmware_supported(); | |
139 | if (r < 0) | |
140 | return r; | |
141 | ||
142 | r = efi_get_variable(EFI_VENDOR_GLOBAL, "OsIndications", NULL, &v, &s); | |
6b62bbbc LP |
143 | if (r == -ENOENT) { |
144 | /* Some firmware implementations that do support | |
145 | * OsIndications and report that with | |
146 | * OsIndicationsSupported will remove the | |
147 | * OsIndications variable when it is unset. Let's | |
148 | * pretend it's 0 then, to hide this implementation | |
149 | * detail. Note that this call will return -ENOENT | |
150 | * then only if the support for OsIndications is | |
151 | * missing entirely, as determined by | |
152 | * efi_reboot_to_firmware_supported() above. */ | |
153 | *os_indication = 0; | |
154 | return 0; | |
155 | } else if (r < 0) | |
5bdf2243 JJ |
156 | return r; |
157 | else if (s != sizeof(uint64_t)) | |
158 | return -EINVAL; | |
159 | ||
160 | *os_indication = *(uint64_t *)v; | |
161 | return 0; | |
162 | } | |
163 | ||
164 | int efi_get_reboot_to_firmware(void) { | |
165 | int r; | |
166 | uint64_t b; | |
167 | ||
168 | r = get_os_indications(&b); | |
169 | if (r < 0) | |
170 | return r; | |
171 | ||
172 | return !!(b & EFI_OS_INDICATIONS_BOOT_TO_FW_UI); | |
173 | } | |
174 | ||
175 | int efi_set_reboot_to_firmware(bool value) { | |
176 | int r; | |
177 | uint64_t b, b_new; | |
178 | ||
179 | r = get_os_indications(&b); | |
180 | if (r < 0) | |
181 | return r; | |
182 | ||
183 | if (value) | |
184 | b_new = b | EFI_OS_INDICATIONS_BOOT_TO_FW_UI; | |
185 | else | |
186 | b_new = b & ~EFI_OS_INDICATIONS_BOOT_TO_FW_UI; | |
187 | ||
188 | /* Avoid writing to efi vars store if we can due to firmware bugs. */ | |
189 | if (b != b_new) | |
190 | return efi_set_variable(EFI_VENDOR_GLOBAL, "OsIndications", &b_new, sizeof(uint64_t)); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
9cde64ff LP |
195 | int efi_get_variable( |
196 | sd_id128_t vendor, | |
197 | const char *name, | |
198 | uint32_t *attribute, | |
199 | void **value, | |
200 | size_t *size) { | |
201 | ||
2e3d0692 LP |
202 | _cleanup_close_ int fd = -1; |
203 | _cleanup_free_ char *p = NULL; | |
204 | uint32_t a; | |
205 | ssize_t n; | |
206 | struct stat st; | |
ad7bcf52 | 207 | _cleanup_free_ void *buf = NULL; |
2e3d0692 LP |
208 | |
209 | assert(name); | |
210 | assert(value); | |
211 | assert(size); | |
212 | ||
213 | if (asprintf(&p, | |
214 | "/sys/firmware/efi/efivars/%s-%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", | |
215 | name, SD_ID128_FORMAT_VAL(vendor)) < 0) | |
216 | return -ENOMEM; | |
217 | ||
218 | fd = open(p, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
219 | if (fd < 0) | |
220 | return -errno; | |
221 | ||
222 | if (fstat(fd, &st) < 0) | |
223 | return -errno; | |
224 | if (st.st_size < 4) | |
225 | return -EIO; | |
226 | if (st.st_size > 4*1024*1024 + 4) | |
227 | return -E2BIG; | |
228 | ||
229 | n = read(fd, &a, sizeof(a)); | |
230 | if (n < 0) | |
9cde64ff | 231 | return -errno; |
2e3d0692 LP |
232 | if (n != sizeof(a)) |
233 | return -EIO; | |
234 | ||
0797f232 ZJS |
235 | buf = malloc(st.st_size - 4 + 2); |
236 | if (!buf) | |
2e3d0692 LP |
237 | return -ENOMEM; |
238 | ||
0797f232 ZJS |
239 | n = read(fd, buf, (size_t) st.st_size - 4); |
240 | if (n < 0) | |
742af54a | 241 | return -errno; |
0797f232 | 242 | if (n != (ssize_t) st.st_size - 4) |
2e3d0692 | 243 | return -EIO; |
2e3d0692 LP |
244 | |
245 | /* Always NUL terminate (2 bytes, to protect UTF-16) */ | |
0797f232 ZJS |
246 | ((char*) buf)[st.st_size - 4] = 0; |
247 | ((char*) buf)[st.st_size - 4 + 1] = 0; | |
2e3d0692 | 248 | |
0797f232 ZJS |
249 | *value = buf; |
250 | buf = NULL; | |
ff47c895 | 251 | *size = (size_t) st.st_size - 4; |
2e3d0692 LP |
252 | |
253 | if (attribute) | |
254 | *attribute = a; | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
0974a682 KS |
259 | int efi_set_variable( |
260 | sd_id128_t vendor, | |
261 | const char *name, | |
262 | const void *value, | |
263 | size_t size) { | |
264 | ||
265 | struct var { | |
266 | uint32_t attr; | |
267 | char buf[]; | |
b7749eb5 ZJS |
268 | } _packed_ * _cleanup_free_ buf = NULL; |
269 | _cleanup_free_ char *p = NULL; | |
270 | _cleanup_close_ int fd = -1; | |
0974a682 KS |
271 | |
272 | assert(name); | |
e1e26566 | 273 | assert(value || size == 0); |
0974a682 KS |
274 | |
275 | if (asprintf(&p, | |
276 | "/sys/firmware/efi/efivars/%s-%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", | |
277 | name, SD_ID128_FORMAT_VAL(vendor)) < 0) | |
278 | return -ENOMEM; | |
279 | ||
280 | if (size == 0) { | |
b7749eb5 ZJS |
281 | if (unlink(p) < 0) |
282 | return -errno; | |
283 | return 0; | |
0974a682 KS |
284 | } |
285 | ||
286 | fd = open(p, O_WRONLY|O_CREAT|O_NOCTTY|O_CLOEXEC, 0644); | |
b7749eb5 ZJS |
287 | if (fd < 0) |
288 | return -errno; | |
0974a682 KS |
289 | |
290 | buf = malloc(sizeof(uint32_t) + size); | |
b7749eb5 ZJS |
291 | if (!buf) |
292 | return -ENOMEM; | |
0974a682 KS |
293 | |
294 | buf->attr = EFI_VARIABLE_NON_VOLATILE|EFI_VARIABLE_BOOTSERVICE_ACCESS|EFI_VARIABLE_RUNTIME_ACCESS; | |
295 | memcpy(buf->buf, value, size); | |
296 | ||
b7749eb5 | 297 | return loop_write(fd, buf, sizeof(uint32_t) + size, false); |
0974a682 KS |
298 | } |
299 | ||
9cde64ff | 300 | int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p) { |
7b4d7cc0 | 301 | _cleanup_free_ void *s = NULL; |
39883f62 | 302 | size_t ss = 0; |
9cde64ff LP |
303 | int r; |
304 | char *x; | |
7b4d7cc0 | 305 | |
9cde64ff LP |
306 | r = efi_get_variable(vendor, name, NULL, &s, &ss); |
307 | if (r < 0) | |
308 | return r; | |
309 | ||
310 | x = utf16_to_utf8(s, ss); | |
311 | if (!x) | |
312 | return -ENOMEM; | |
313 | ||
314 | *p = x; | |
315 | return 0; | |
7b4d7cc0 KS |
316 | } |
317 | ||
318 | static size_t utf16_size(const uint16_t *s) { | |
319 | size_t l = 0; | |
320 | ||
321 | while (s[l] > 0) | |
322 | l++; | |
9cde64ff | 323 | |
7b4d7cc0 KS |
324 | return (l+1) * sizeof(uint16_t); |
325 | } | |
326 | ||
327 | static void efi_guid_to_id128(const void *guid, sd_id128_t *id128) { | |
328 | struct uuid { | |
329 | uint32_t u1; | |
330 | uint16_t u2; | |
331 | uint16_t u3; | |
332 | uint8_t u4[8]; | |
333 | } _packed_; | |
334 | const struct uuid *uuid = guid; | |
335 | ||
336 | id128->bytes[0] = (uuid->u1 >> 24) & 0xff; | |
337 | id128->bytes[1] = (uuid->u1 >> 16) & 0xff; | |
338 | id128->bytes[2] = (uuid->u1 >> 8) & 0xff; | |
339 | id128->bytes[3] = (uuid->u1) & 0xff; | |
340 | id128->bytes[4] = (uuid->u2 >> 8) & 0xff; | |
341 | id128->bytes[5] = (uuid->u2) & 0xff; | |
342 | id128->bytes[6] = (uuid->u3 >> 8) & 0xff; | |
343 | id128->bytes[7] = (uuid->u3) & 0xff; | |
344 | memcpy(&id128->bytes[8], uuid->u4, sizeof(uuid->u4)); | |
345 | } | |
346 | ||
9cde64ff LP |
347 | int efi_get_boot_option( |
348 | uint16_t id, | |
349 | char **title, | |
350 | sd_id128_t *part_uuid, | |
0974a682 KS |
351 | char **path, |
352 | bool *active) { | |
7b4d7cc0 | 353 | |
9cde64ff LP |
354 | char boot_id[9]; |
355 | _cleanup_free_ uint8_t *buf = NULL; | |
7b4d7cc0 KS |
356 | size_t l; |
357 | struct boot_option *header; | |
358 | size_t title_size; | |
b7749eb5 | 359 | _cleanup_free_ char *s = NULL, *p = NULL; |
7b4d7cc0 | 360 | sd_id128_t p_uuid = SD_ID128_NULL; |
a8436474 | 361 | int r; |
7b4d7cc0 | 362 | |
b7749eb5 | 363 | xsprintf(boot_id, "Boot%04X", id); |
a8436474 ZJS |
364 | r = efi_get_variable(EFI_VENDOR_GLOBAL, boot_id, NULL, (void **)&buf, &l); |
365 | if (r < 0) | |
366 | return r; | |
7b4d7cc0 KS |
367 | if (l < sizeof(struct boot_option)) |
368 | return -ENOENT; | |
369 | ||
370 | header = (struct boot_option *)buf; | |
371 | title_size = utf16_size(header->title); | |
372 | if (title_size > l - offsetof(struct boot_option, title)) | |
373 | return -EINVAL; | |
374 | ||
5483a186 ZJS |
375 | if (title) { |
376 | s = utf16_to_utf8(header->title, title_size); | |
b7749eb5 ZJS |
377 | if (!s) |
378 | return -ENOMEM; | |
7b4d7cc0 KS |
379 | } |
380 | ||
381 | if (header->path_len > 0) { | |
9cde64ff | 382 | uint8_t *dbuf; |
7b4d7cc0 KS |
383 | size_t dnext; |
384 | ||
385 | dbuf = buf + offsetof(struct boot_option, title) + title_size; | |
386 | dnext = 0; | |
387 | while (dnext < header->path_len) { | |
388 | struct device_path *dpath; | |
389 | ||
390 | dpath = (struct device_path *)(dbuf + dnext); | |
391 | if (dpath->length < 4) | |
392 | break; | |
393 | ||
394 | /* Type 0x7F – End of Hardware Device Path, Sub-Type 0xFF – End Entire Device Path */ | |
0974a682 | 395 | if (dpath->type == END_DEVICE_PATH_TYPE && dpath->sub_type == END_ENTIRE_DEVICE_PATH_SUBTYPE) |
7b4d7cc0 KS |
396 | break; |
397 | ||
398 | dnext += dpath->length; | |
399 | ||
400 | /* Type 0x04 – Media Device Path */ | |
0974a682 | 401 | if (dpath->type != MEDIA_DEVICE_PATH) |
7b4d7cc0 KS |
402 | continue; |
403 | ||
404 | /* Sub-Type 1 – Hard Drive */ | |
0974a682 | 405 | if (dpath->sub_type == MEDIA_HARDDRIVE_DP) { |
7b4d7cc0 | 406 | /* 0x02 – GUID Partition Table */ |
0974a682 | 407 | if (dpath->drive.mbr_type != MBR_TYPE_EFI_PARTITION_TABLE_HEADER) |
7b4d7cc0 KS |
408 | continue; |
409 | ||
410 | /* 0x02 – GUID signature */ | |
0974a682 | 411 | if (dpath->drive.signature_type != SIGNATURE_TYPE_GUID) |
7b4d7cc0 KS |
412 | continue; |
413 | ||
5483a186 ZJS |
414 | if (part_uuid) |
415 | efi_guid_to_id128(dpath->drive.signature, &p_uuid); | |
7b4d7cc0 KS |
416 | continue; |
417 | } | |
418 | ||
419 | /* Sub-Type 4 – File Path */ | |
0974a682 | 420 | if (dpath->sub_type == MEDIA_FILEPATH_DP && !p && path) { |
7b4d7cc0 | 421 | p = utf16_to_utf8(dpath->path, dpath->length-4); |
0974a682 | 422 | efi_tilt_backslashes(p); |
7b4d7cc0 KS |
423 | continue; |
424 | } | |
425 | } | |
426 | } | |
427 | ||
b7749eb5 | 428 | if (title) { |
9cde64ff | 429 | *title = s; |
b7749eb5 ZJS |
430 | s = NULL; |
431 | } | |
7b4d7cc0 KS |
432 | if (part_uuid) |
433 | *part_uuid = p_uuid; | |
b7749eb5 | 434 | if (path) { |
7b4d7cc0 | 435 | *path = p; |
b7749eb5 ZJS |
436 | p = NULL; |
437 | } | |
0974a682 | 438 | if (active) |
0aa3b783 | 439 | *active = !!(header->attr & LOAD_OPTION_ACTIVE); |
9cde64ff | 440 | |
7b4d7cc0 | 441 | return 0; |
7b4d7cc0 KS |
442 | } |
443 | ||
0974a682 KS |
444 | static void to_utf16(uint16_t *dest, const char *src) { |
445 | int i; | |
446 | ||
447 | for (i = 0; src[i] != '\0'; i++) | |
448 | dest[i] = src[i]; | |
449 | dest[i] = '\0'; | |
450 | } | |
451 | ||
452 | struct guid { | |
453 | uint32_t u1; | |
454 | uint16_t u2; | |
455 | uint16_t u3; | |
456 | uint8_t u4[8]; | |
885fdebc | 457 | } _packed_; |
0974a682 KS |
458 | |
459 | static void id128_to_efi_guid(sd_id128_t id, void *guid) { | |
460 | struct guid *uuid = guid; | |
461 | ||
462 | uuid->u1 = id.bytes[0] << 24 | id.bytes[1] << 16 | id.bytes[2] << 8 | id.bytes[3]; | |
463 | uuid->u2 = id.bytes[4] << 8 | id.bytes[5]; | |
464 | uuid->u3 = id.bytes[6] << 8 | id.bytes[7]; | |
465 | memcpy(uuid->u4, id.bytes+8, sizeof(uuid->u4)); | |
466 | } | |
467 | ||
468 | static uint16_t *tilt_slashes(uint16_t *s) { | |
469 | uint16_t *p; | |
470 | ||
471 | for (p = s; *p; p++) | |
472 | if (*p == '/') | |
473 | *p = '\\'; | |
474 | ||
475 | return s; | |
476 | } | |
477 | ||
0974a682 KS |
478 | int efi_add_boot_option(uint16_t id, const char *title, |
479 | uint32_t part, uint64_t pstart, uint64_t psize, | |
480 | sd_id128_t part_uuid, const char *path) { | |
481 | char boot_id[9]; | |
0974a682 KS |
482 | size_t size; |
483 | size_t title_len; | |
484 | size_t path_len; | |
485 | struct boot_option *option; | |
486 | struct device_path *devicep; | |
b7749eb5 | 487 | _cleanup_free_ char *buf = NULL; |
0974a682 KS |
488 | |
489 | title_len = (strlen(title)+1) * 2; | |
490 | path_len = (strlen(path)+1) * 2; | |
491 | ||
492 | buf = calloc(sizeof(struct boot_option) + title_len + | |
493 | sizeof(struct drive_path) + | |
494 | sizeof(struct device_path) + path_len, 1); | |
b7749eb5 ZJS |
495 | if (!buf) |
496 | return -ENOMEM; | |
0974a682 KS |
497 | |
498 | /* header */ | |
499 | option = (struct boot_option *)buf; | |
500 | option->attr = LOAD_OPTION_ACTIVE; | |
501 | option->path_len = offsetof(struct device_path, drive) + sizeof(struct drive_path) + | |
502 | offsetof(struct device_path, path) + path_len + | |
503 | offsetof(struct device_path, path); | |
504 | to_utf16(option->title, title); | |
505 | size = offsetof(struct boot_option, title) + title_len; | |
506 | ||
507 | /* partition info */ | |
508 | devicep = (struct device_path *)(buf + size); | |
509 | devicep->type = MEDIA_DEVICE_PATH; | |
510 | devicep->sub_type = MEDIA_HARDDRIVE_DP; | |
511 | devicep->length = offsetof(struct device_path, drive) + sizeof(struct drive_path); | |
512 | devicep->drive.part_nr = part; | |
513 | devicep->drive.part_start = pstart; | |
920b52e4 | 514 | devicep->drive.part_size = psize; |
0974a682 KS |
515 | devicep->drive.signature_type = SIGNATURE_TYPE_GUID; |
516 | devicep->drive.mbr_type = MBR_TYPE_EFI_PARTITION_TABLE_HEADER; | |
517 | id128_to_efi_guid(part_uuid, devicep->drive.signature); | |
518 | size += devicep->length; | |
519 | ||
520 | /* path to loader */ | |
521 | devicep = (struct device_path *)(buf + size); | |
522 | devicep->type = MEDIA_DEVICE_PATH; | |
523 | devicep->sub_type = MEDIA_FILEPATH_DP; | |
524 | devicep->length = offsetof(struct device_path, path) + path_len; | |
525 | to_utf16(devicep->path, path); | |
526 | tilt_slashes(devicep->path); | |
527 | size += devicep->length; | |
528 | ||
529 | /* end of path */ | |
530 | devicep = (struct device_path *)(buf + size); | |
531 | devicep->type = END_DEVICE_PATH_TYPE; | |
532 | devicep->sub_type = END_ENTIRE_DEVICE_PATH_SUBTYPE; | |
533 | devicep->length = offsetof(struct device_path, path); | |
534 | size += devicep->length; | |
535 | ||
b7749eb5 ZJS |
536 | xsprintf(boot_id, "Boot%04X", id); |
537 | return efi_set_variable(EFI_VENDOR_GLOBAL, boot_id, buf, size); | |
0974a682 KS |
538 | } |
539 | ||
540 | int efi_remove_boot_option(uint16_t id) { | |
541 | char boot_id[9]; | |
542 | ||
b7749eb5 | 543 | xsprintf(boot_id, "Boot%04X", id); |
0974a682 KS |
544 | return efi_set_variable(EFI_VENDOR_GLOBAL, boot_id, NULL, 0); |
545 | } | |
546 | ||
9cde64ff | 547 | int efi_get_boot_order(uint16_t **order) { |
0797f232 | 548 | _cleanup_free_ void *buf = NULL; |
7b4d7cc0 | 549 | size_t l; |
9cde64ff | 550 | int r; |
7b4d7cc0 | 551 | |
9cde64ff LP |
552 | r = efi_get_variable(EFI_VENDOR_GLOBAL, "BootOrder", NULL, &buf, &l); |
553 | if (r < 0) | |
554 | return r; | |
7b4d7cc0 | 555 | |
0797f232 | 556 | if (l <= 0) |
7b4d7cc0 | 557 | return -ENOENT; |
7b4d7cc0 | 558 | |
0797f232 ZJS |
559 | if (l % sizeof(uint16_t) > 0 || |
560 | l / sizeof(uint16_t) > INT_MAX) | |
7b4d7cc0 | 561 | return -EINVAL; |
7b4d7cc0 KS |
562 | |
563 | *order = buf; | |
0797f232 | 564 | buf = NULL; |
9cde64ff LP |
565 | return (int) (l / sizeof(uint16_t)); |
566 | } | |
567 | ||
0974a682 KS |
568 | int efi_set_boot_order(uint16_t *order, size_t n) { |
569 | return efi_set_variable(EFI_VENDOR_GLOBAL, "BootOrder", order, n * sizeof(uint16_t)); | |
570 | } | |
571 | ||
4d34c495 KS |
572 | static int boot_id_hex(const char s[4]) { |
573 | int i; | |
574 | int id = 0; | |
575 | ||
576 | for (i = 0; i < 4; i++) | |
577 | if (s[i] >= '0' && s[i] <= '9') | |
578 | id |= (s[i] - '0') << (3 - i) * 4; | |
579 | else if (s[i] >= 'A' && s[i] <= 'F') | |
580 | id |= (s[i] - 'A' + 10) << (3 - i) * 4; | |
581 | else | |
7e8185ef | 582 | return -EINVAL; |
4d34c495 KS |
583 | |
584 | return id; | |
585 | } | |
586 | ||
9db11a99 LP |
587 | static int cmp_uint16(const void *_a, const void *_b) { |
588 | const uint16_t *a = _a, *b = _b; | |
589 | ||
02a6fc3e | 590 | return (int)*a - (int)*b; |
9db11a99 LP |
591 | } |
592 | ||
9cde64ff LP |
593 | int efi_get_boot_options(uint16_t **options) { |
594 | _cleanup_closedir_ DIR *dir = NULL; | |
595 | struct dirent *de; | |
b7749eb5 | 596 | _cleanup_free_ uint16_t *list = NULL; |
7432b24b | 597 | size_t alloc = 0; |
b7749eb5 | 598 | int count = 0; |
9cde64ff LP |
599 | |
600 | assert(options); | |
601 | ||
602 | dir = opendir("/sys/firmware/efi/efivars/"); | |
603 | if (!dir) | |
604 | return -errno; | |
605 | ||
b7749eb5 | 606 | FOREACH_DIRENT(de, dir, return -errno) { |
4d34c495 | 607 | int id; |
9cde64ff LP |
608 | |
609 | if (strncmp(de->d_name, "Boot", 4) != 0) | |
610 | continue; | |
611 | ||
4d34c495 | 612 | if (strlen(de->d_name) != 45) |
9cde64ff LP |
613 | continue; |
614 | ||
615 | if (strcmp(de->d_name + 8, "-8be4df61-93ca-11d2-aa0d-00e098032b8c") != 0) | |
616 | continue; | |
617 | ||
4d34c495 KS |
618 | id = boot_id_hex(de->d_name + 4); |
619 | if (id < 0) | |
9cde64ff LP |
620 | continue; |
621 | ||
7432b24b | 622 | if (!GREEDY_REALLOC(list, alloc, count + 1)) |
b7749eb5 | 623 | return -ENOMEM; |
9cde64ff | 624 | |
7432b24b | 625 | list[count++] = id; |
9cde64ff LP |
626 | } |
627 | ||
7ff7394d | 628 | qsort_safe(list, count, sizeof(uint16_t), cmp_uint16); |
9db11a99 | 629 | |
9cde64ff | 630 | *options = list; |
b7749eb5 | 631 | list = NULL; |
9cde64ff | 632 | return count; |
7b4d7cc0 KS |
633 | } |
634 | ||
5dbe9f53 | 635 | static int read_usec(sd_id128_t vendor, const char *name, usec_t *u) { |
2e3d0692 | 636 | _cleanup_free_ char *j = NULL; |
2e3d0692 | 637 | int r; |
39883f62 | 638 | uint64_t x = 0; |
2e3d0692 LP |
639 | |
640 | assert(name); | |
641 | assert(u); | |
642 | ||
61cc634b | 643 | r = efi_get_variable_string(EFI_VENDOR_LOADER, name, &j); |
2e3d0692 LP |
644 | if (r < 0) |
645 | return r; | |
646 | ||
2e3d0692 LP |
647 | r = safe_atou64(j, &x); |
648 | if (r < 0) | |
649 | return r; | |
650 | ||
5dbe9f53 | 651 | *u = x; |
2e3d0692 LP |
652 | return 0; |
653 | } | |
654 | ||
c51d84dc | 655 | int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader) { |
2e3d0692 LP |
656 | uint64_t x, y; |
657 | int r; | |
2e3d0692 LP |
658 | |
659 | assert(firmware); | |
660 | assert(loader); | |
661 | ||
e9cea16d | 662 | r = read_usec(EFI_VENDOR_LOADER, "LoaderTimeInitUSec", &x); |
2e3d0692 LP |
663 | if (r < 0) |
664 | return r; | |
665 | ||
e9cea16d | 666 | r = read_usec(EFI_VENDOR_LOADER, "LoaderTimeExecUSec", &y); |
2e3d0692 LP |
667 | if (r < 0) |
668 | return r; | |
669 | ||
670 | if (y == 0 || y < x) | |
671 | return -EIO; | |
672 | ||
673 | if (y > USEC_PER_HOUR) | |
674 | return -EIO; | |
675 | ||
676 | *firmware = x; | |
677 | *loader = y; | |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
c51d84dc | 682 | int efi_loader_get_device_part_uuid(sd_id128_t *u) { |
f4ce2b3e | 683 | _cleanup_free_ char *p = NULL; |
f4ce2b3e | 684 | int r, parsed[16]; |
f4ce2b3e | 685 | |
61cc634b | 686 | r = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderDevicePartUUID", &p); |
f4ce2b3e LP |
687 | if (r < 0) |
688 | return r; | |
689 | ||
f4ce2b3e LP |
690 | if (sscanf(p, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", |
691 | &parsed[0], &parsed[1], &parsed[2], &parsed[3], | |
692 | &parsed[4], &parsed[5], &parsed[6], &parsed[7], | |
693 | &parsed[8], &parsed[9], &parsed[10], &parsed[11], | |
694 | &parsed[12], &parsed[13], &parsed[14], &parsed[15]) != 16) | |
695 | return -EIO; | |
696 | ||
73b80ec2 LP |
697 | if (u) { |
698 | unsigned i; | |
699 | ||
700 | for (i = 0; i < ELEMENTSOF(parsed); i++) | |
701 | u->bytes[i] = parsed[i]; | |
702 | } | |
f4ce2b3e LP |
703 | |
704 | return 0; | |
705 | } | |
b872e9a0 LP |
706 | |
707 | #endif | |
b28ce7c6 TG |
708 | |
709 | char *efi_tilt_backslashes(char *s) { | |
710 | char *p; | |
711 | ||
712 | for (p = s; *p; p++) | |
713 | if (*p == '\\') | |
714 | *p = '/'; | |
715 | ||
716 | return s; | |
717 | } |