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