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