]>
Commit | Line | Data |
---|---|---|
1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | ||
3 | #include <stdio.h> | |
4 | #include <linux/magic.h> | |
5 | #include <unistd.h> | |
6 | ||
7 | #include "sd-device.h" | |
8 | #include "sd-id128.h" | |
9 | ||
10 | #include "alloc-util.h" | |
11 | #include "blkid-util.h" | |
12 | #include "bootspec.h" | |
13 | #include "conf-files.h" | |
14 | #include "def.h" | |
15 | #include "device-nodes.h" | |
16 | #include "dirent-util.h" | |
17 | #include "efivars.h" | |
18 | #include "env-file.h" | |
19 | #include "env-util.h" | |
20 | #include "fd-util.h" | |
21 | #include "fileio.h" | |
22 | #include "parse-util.h" | |
23 | #include "path-util.h" | |
24 | #include "pe-header.h" | |
25 | #include "sort-util.h" | |
26 | #include "stat-util.h" | |
27 | #include "string-table.h" | |
28 | #include "string-util.h" | |
29 | #include "strv.h" | |
30 | #include "unaligned.h" | |
31 | #include "util.h" | |
32 | #include "virt.h" | |
33 | ||
34 | static void boot_entry_free(BootEntry *entry) { | |
35 | assert(entry); | |
36 | ||
37 | free(entry->id); | |
38 | free(entry->path); | |
39 | free(entry->root); | |
40 | free(entry->title); | |
41 | free(entry->show_title); | |
42 | free(entry->version); | |
43 | free(entry->machine_id); | |
44 | free(entry->architecture); | |
45 | strv_free(entry->options); | |
46 | free(entry->kernel); | |
47 | free(entry->efi); | |
48 | strv_free(entry->initrd); | |
49 | free(entry->device_tree); | |
50 | } | |
51 | ||
52 | static int boot_entry_load( | |
53 | const char *root, | |
54 | const char *path, | |
55 | BootEntry *entry) { | |
56 | ||
57 | _cleanup_(boot_entry_free) BootEntry tmp = { | |
58 | .type = BOOT_ENTRY_CONF, | |
59 | }; | |
60 | ||
61 | _cleanup_fclose_ FILE *f = NULL; | |
62 | unsigned line = 1; | |
63 | char *b, *c; | |
64 | int r; | |
65 | ||
66 | assert(root); | |
67 | assert(path); | |
68 | assert(entry); | |
69 | ||
70 | c = endswith_no_case(path, ".conf"); | |
71 | if (!c) | |
72 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid loader entry file suffix: %s", path); | |
73 | ||
74 | b = basename(path); | |
75 | tmp.id = strndup(b, c - b); | |
76 | if (!tmp.id) | |
77 | return log_oom(); | |
78 | ||
79 | if (!efi_loader_entry_name_valid(tmp.id)) | |
80 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid loader entry filename: %s", path); | |
81 | ||
82 | tmp.path = strdup(path); | |
83 | if (!tmp.path) | |
84 | return log_oom(); | |
85 | ||
86 | tmp.root = strdup(root); | |
87 | if (!tmp.root) | |
88 | return log_oom(); | |
89 | ||
90 | f = fopen(path, "re"); | |
91 | if (!f) | |
92 | return log_error_errno(errno, "Failed to open \"%s\": %m", path); | |
93 | ||
94 | for (;;) { | |
95 | _cleanup_free_ char *buf = NULL, *field = NULL; | |
96 | const char *p; | |
97 | ||
98 | r = read_line(f, LONG_LINE_MAX, &buf); | |
99 | if (r == 0) | |
100 | break; | |
101 | if (r == -ENOBUFS) | |
102 | return log_error_errno(r, "%s:%u: Line too long", path, line); | |
103 | if (r < 0) | |
104 | return log_error_errno(r, "%s:%u: Error while reading: %m", path, line); | |
105 | ||
106 | line++; | |
107 | ||
108 | if (IN_SET(*strstrip(buf), '#', '\0')) | |
109 | continue; | |
110 | ||
111 | p = buf; | |
112 | r = extract_first_word(&p, &field, " \t", 0); | |
113 | if (r < 0) { | |
114 | log_error_errno(r, "Failed to parse config file %s line %u: %m", path, line); | |
115 | continue; | |
116 | } | |
117 | if (r == 0) { | |
118 | log_warning("%s:%u: Bad syntax", path, line); | |
119 | continue; | |
120 | } | |
121 | ||
122 | if (streq(field, "title")) | |
123 | r = free_and_strdup(&tmp.title, p); | |
124 | else if (streq(field, "version")) | |
125 | r = free_and_strdup(&tmp.version, p); | |
126 | else if (streq(field, "machine-id")) | |
127 | r = free_and_strdup(&tmp.machine_id, p); | |
128 | else if (streq(field, "architecture")) | |
129 | r = free_and_strdup(&tmp.architecture, p); | |
130 | else if (streq(field, "options")) | |
131 | r = strv_extend(&tmp.options, p); | |
132 | else if (streq(field, "linux")) | |
133 | r = free_and_strdup(&tmp.kernel, p); | |
134 | else if (streq(field, "efi")) | |
135 | r = free_and_strdup(&tmp.efi, p); | |
136 | else if (streq(field, "initrd")) | |
137 | r = strv_extend(&tmp.initrd, p); | |
138 | else if (streq(field, "devicetree")) | |
139 | r = free_and_strdup(&tmp.device_tree, p); | |
140 | else { | |
141 | log_notice("%s:%u: Unknown line \"%s\", ignoring.", path, line, field); | |
142 | continue; | |
143 | } | |
144 | if (r < 0) | |
145 | return log_error_errno(r, "%s:%u: Error while reading: %m", path, line); | |
146 | } | |
147 | ||
148 | *entry = tmp; | |
149 | tmp = (BootEntry) {}; | |
150 | return 0; | |
151 | } | |
152 | ||
153 | void boot_config_free(BootConfig *config) { | |
154 | size_t i; | |
155 | ||
156 | assert(config); | |
157 | ||
158 | free(config->default_pattern); | |
159 | free(config->timeout); | |
160 | free(config->editor); | |
161 | free(config->auto_entries); | |
162 | free(config->auto_firmware); | |
163 | free(config->console_mode); | |
164 | ||
165 | free(config->entry_oneshot); | |
166 | free(config->entry_default); | |
167 | ||
168 | for (i = 0; i < config->n_entries; i++) | |
169 | boot_entry_free(config->entries + i); | |
170 | free(config->entries); | |
171 | } | |
172 | ||
173 | static int boot_loader_read_conf(const char *path, BootConfig *config) { | |
174 | _cleanup_fclose_ FILE *f = NULL; | |
175 | unsigned line = 1; | |
176 | int r; | |
177 | ||
178 | assert(path); | |
179 | assert(config); | |
180 | ||
181 | f = fopen(path, "re"); | |
182 | if (!f) { | |
183 | if (errno == ENOENT) | |
184 | return 0; | |
185 | ||
186 | return log_error_errno(errno, "Failed to open \"%s\": %m", path); | |
187 | } | |
188 | ||
189 | for (;;) { | |
190 | _cleanup_free_ char *buf = NULL, *field = NULL; | |
191 | const char *p; | |
192 | ||
193 | r = read_line(f, LONG_LINE_MAX, &buf); | |
194 | if (r == 0) | |
195 | break; | |
196 | if (r == -ENOBUFS) | |
197 | return log_error_errno(r, "%s:%u: Line too long", path, line); | |
198 | if (r < 0) | |
199 | return log_error_errno(r, "%s:%u: Error while reading: %m", path, line); | |
200 | ||
201 | line++; | |
202 | ||
203 | if (IN_SET(*strstrip(buf), '#', '\0')) | |
204 | continue; | |
205 | ||
206 | p = buf; | |
207 | r = extract_first_word(&p, &field, " \t", 0); | |
208 | if (r < 0) { | |
209 | log_error_errno(r, "Failed to parse config file %s line %u: %m", path, line); | |
210 | continue; | |
211 | } | |
212 | if (r == 0) { | |
213 | log_warning("%s:%u: Bad syntax", path, line); | |
214 | continue; | |
215 | } | |
216 | ||
217 | if (streq(field, "default")) | |
218 | r = free_and_strdup(&config->default_pattern, p); | |
219 | else if (streq(field, "timeout")) | |
220 | r = free_and_strdup(&config->timeout, p); | |
221 | else if (streq(field, "editor")) | |
222 | r = free_and_strdup(&config->editor, p); | |
223 | else if (streq(field, "auto-entries")) | |
224 | r = free_and_strdup(&config->auto_entries, p); | |
225 | else if (streq(field, "auto-firmware")) | |
226 | r = free_and_strdup(&config->auto_firmware, p); | |
227 | else if (streq(field, "console-mode")) | |
228 | r = free_and_strdup(&config->console_mode, p); | |
229 | else { | |
230 | log_notice("%s:%u: Unknown line \"%s\", ignoring.", path, line, field); | |
231 | continue; | |
232 | } | |
233 | if (r < 0) | |
234 | return log_error_errno(r, "%s:%u: Error while reading: %m", path, line); | |
235 | } | |
236 | ||
237 | return 1; | |
238 | } | |
239 | ||
240 | static int boot_entry_compare(const BootEntry *a, const BootEntry *b) { | |
241 | return str_verscmp(a->id, b->id); | |
242 | } | |
243 | ||
244 | static int boot_entries_find( | |
245 | const char *root, | |
246 | const char *dir, | |
247 | BootEntry **entries, | |
248 | size_t *n_entries) { | |
249 | ||
250 | _cleanup_strv_free_ char **files = NULL; | |
251 | size_t n_allocated = *n_entries; | |
252 | char **f; | |
253 | int r; | |
254 | ||
255 | assert(root); | |
256 | assert(dir); | |
257 | assert(entries); | |
258 | assert(n_entries); | |
259 | ||
260 | r = conf_files_list(&files, ".conf", NULL, 0, dir, NULL); | |
261 | if (r < 0) | |
262 | return log_error_errno(r, "Failed to list files in \"%s\": %m", dir); | |
263 | ||
264 | STRV_FOREACH(f, files) { | |
265 | if (!GREEDY_REALLOC0(*entries, n_allocated, *n_entries + 1)) | |
266 | return log_oom(); | |
267 | ||
268 | r = boot_entry_load(root, *f, *entries + *n_entries); | |
269 | if (r < 0) | |
270 | continue; | |
271 | ||
272 | (*n_entries) ++; | |
273 | } | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
278 | static int boot_entry_load_unified( | |
279 | const char *root, | |
280 | const char *path, | |
281 | const char *osrelease, | |
282 | const char *cmdline, | |
283 | BootEntry *ret) { | |
284 | ||
285 | _cleanup_free_ char *os_pretty_name = NULL, *os_id = NULL, *version_id = NULL, *build_id = NULL; | |
286 | _cleanup_(boot_entry_free) BootEntry tmp = { | |
287 | .type = BOOT_ENTRY_UNIFIED, | |
288 | }; | |
289 | _cleanup_fclose_ FILE *f = NULL; | |
290 | const char *k; | |
291 | int r; | |
292 | ||
293 | assert(root); | |
294 | assert(path); | |
295 | assert(osrelease); | |
296 | ||
297 | k = path_startswith(path, root); | |
298 | if (!k) | |
299 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Path is not below root: %s", path); | |
300 | ||
301 | f = fmemopen_unlocked((void*) osrelease, strlen(osrelease), "r"); | |
302 | if (!f) | |
303 | return log_error_errno(errno, "Failed to open os-release buffer: %m"); | |
304 | ||
305 | r = parse_env_file(f, "os-release", | |
306 | "PRETTY_NAME", &os_pretty_name, | |
307 | "ID", &os_id, | |
308 | "VERSION_ID", &version_id, | |
309 | "BUILD_ID", &build_id); | |
310 | if (r < 0) | |
311 | return log_error_errno(r, "Failed to parse os-release data from unified kernel image %s: %m", path); | |
312 | ||
313 | if (!os_pretty_name || !os_id || !(version_id || build_id)) | |
314 | return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Missing fields in os-release data from unified kernel image %s, refusing.", path); | |
315 | ||
316 | tmp.id = strjoin(os_id, "-", version_id ?: build_id); | |
317 | if (!tmp.id) | |
318 | return log_oom(); | |
319 | ||
320 | if (!efi_loader_entry_name_valid(tmp.id)) | |
321 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid loader entry: %s", tmp.id); | |
322 | ||
323 | tmp.path = strdup(path); | |
324 | if (!tmp.path) | |
325 | return log_oom(); | |
326 | ||
327 | tmp.root = strdup(root); | |
328 | if (!tmp.root) | |
329 | return log_oom(); | |
330 | ||
331 | tmp.kernel = strdup(skip_leading_chars(k, "/")); | |
332 | if (!tmp.kernel) | |
333 | return log_oom(); | |
334 | ||
335 | tmp.options = strv_new(skip_leading_chars(cmdline, WHITESPACE)); | |
336 | if (!tmp.options) | |
337 | return log_oom(); | |
338 | ||
339 | delete_trailing_chars(tmp.options[0], WHITESPACE); | |
340 | ||
341 | tmp.title = TAKE_PTR(os_pretty_name); | |
342 | ||
343 | *ret = tmp; | |
344 | tmp = (BootEntry) {}; | |
345 | return 0; | |
346 | } | |
347 | ||
348 | /* Maximum PE section we are willing to load (Note that sections we are not interested in may be larger, but | |
349 | * the ones we do care about and we are willing to load into memory have this size limit.) */ | |
350 | #define PE_SECTION_SIZE_MAX (4U*1024U*1024U) | |
351 | ||
352 | static int find_sections( | |
353 | int fd, | |
354 | char **ret_osrelease, | |
355 | char **ret_cmdline) { | |
356 | ||
357 | _cleanup_free_ struct PeSectionHeader *sections = NULL; | |
358 | _cleanup_free_ char *osrelease = NULL, *cmdline = NULL; | |
359 | size_t i, n_sections; | |
360 | struct DosFileHeader dos; | |
361 | struct PeHeader pe; | |
362 | uint64_t start; | |
363 | ssize_t n; | |
364 | ||
365 | n = pread(fd, &dos, sizeof(dos), 0); | |
366 | if (n < 0) | |
367 | return log_error_errno(errno, "Failed read DOS header: %m"); | |
368 | if (n != sizeof(dos)) | |
369 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading DOS header, refusing."); | |
370 | ||
371 | if (dos.Magic[0] != 'M' || dos.Magic[1] != 'Z') | |
372 | return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "DOS executable magic missing, refusing."); | |
373 | ||
374 | start = unaligned_read_le32(&dos.ExeHeader); | |
375 | n = pread(fd, &pe, sizeof(pe), start); | |
376 | if (n < 0) | |
377 | return log_error_errno(errno, "Failed to read PE header: %m"); | |
378 | if (n != sizeof(pe)) | |
379 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading PE header, refusing."); | |
380 | ||
381 | if (pe.Magic[0] != 'P' || pe.Magic[1] != 'E' || pe.Magic[2] != 0 || pe.Magic[3] != 0) | |
382 | return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "PE executable magic missing, refusing."); | |
383 | ||
384 | n_sections = unaligned_read_le16(&pe.FileHeader.NumberOfSections); | |
385 | if (n_sections > 96) | |
386 | return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "PE header has too many sections, refusing."); | |
387 | ||
388 | sections = new(struct PeSectionHeader, n_sections); | |
389 | if (!sections) | |
390 | return log_oom(); | |
391 | ||
392 | n = pread(fd, sections, | |
393 | n_sections * sizeof(struct PeSectionHeader), | |
394 | start + sizeof(pe) + unaligned_read_le16(&pe.FileHeader.SizeOfOptionalHeader)); | |
395 | if (n < 0) | |
396 | return log_error_errno(errno, "Failed to read section data: %m"); | |
397 | if ((size_t) n != n_sections * sizeof(struct PeSectionHeader)) | |
398 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading sections, refusing."); | |
399 | ||
400 | for (i = 0; i < n_sections; i++) { | |
401 | _cleanup_free_ char *k = NULL; | |
402 | uint32_t offset, size; | |
403 | char **b; | |
404 | ||
405 | if (strneq((char*) sections[i].Name, ".osrel", sizeof(sections[i].Name))) | |
406 | b = &osrelease; | |
407 | else if (strneq((char*) sections[i].Name, ".cmdline", sizeof(sections[i].Name))) | |
408 | b = &cmdline; | |
409 | else | |
410 | continue; | |
411 | ||
412 | if (*b) | |
413 | return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Duplicate section %s, refusing.", sections[i].Name); | |
414 | ||
415 | offset = unaligned_read_le32(§ions[i].PointerToRawData); | |
416 | size = unaligned_read_le32(§ions[i].VirtualSize); | |
417 | ||
418 | if (size > PE_SECTION_SIZE_MAX) | |
419 | return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Section %s too large, refusing.", sections[i].Name); | |
420 | ||
421 | k = new(char, size+1); | |
422 | if (!k) | |
423 | return log_oom(); | |
424 | ||
425 | n = pread(fd, k, size, offset); | |
426 | if (n < 0) | |
427 | return log_error_errno(errno, "Failed to read section payload: %m"); | |
428 | if ((size_t) n != size) | |
429 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short read while reading section payload, refusing:"); | |
430 | ||
431 | /* Allow one trailing NUL byte, but nothing more. */ | |
432 | if (size > 0 && memchr(k, 0, size - 1)) | |
433 | return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Section contains embedded NUL byte: %m"); | |
434 | ||
435 | k[size] = 0; | |
436 | *b = TAKE_PTR(k); | |
437 | } | |
438 | ||
439 | if (!osrelease) | |
440 | return log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Image lacks .osrel section, refusing."); | |
441 | ||
442 | if (ret_osrelease) | |
443 | *ret_osrelease = TAKE_PTR(osrelease); | |
444 | if (ret_cmdline) | |
445 | *ret_cmdline = TAKE_PTR(cmdline); | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | static int boot_entries_find_unified( | |
451 | const char *root, | |
452 | const char *dir, | |
453 | BootEntry **entries, | |
454 | size_t *n_entries) { | |
455 | ||
456 | _cleanup_(closedirp) DIR *d = NULL; | |
457 | size_t n_allocated = *n_entries; | |
458 | struct dirent *de; | |
459 | int r; | |
460 | ||
461 | assert(root); | |
462 | assert(dir); | |
463 | assert(entries); | |
464 | assert(n_entries); | |
465 | ||
466 | d = opendir(dir); | |
467 | if (!d) { | |
468 | if (errno == ENOENT) | |
469 | return 0; | |
470 | ||
471 | return log_error_errno(errno, "Failed to open %s: %m", dir); | |
472 | } | |
473 | ||
474 | FOREACH_DIRENT(de, d, return log_error_errno(errno, "Failed to read %s: %m", dir)) { | |
475 | _cleanup_free_ char *j = NULL, *osrelease = NULL, *cmdline = NULL; | |
476 | _cleanup_close_ int fd = -1; | |
477 | ||
478 | if (!dirent_is_file(de)) | |
479 | continue; | |
480 | ||
481 | if (!endswith_no_case(de->d_name, ".efi")) | |
482 | continue; | |
483 | ||
484 | if (!GREEDY_REALLOC0(*entries, n_allocated, *n_entries + 1)) | |
485 | return log_oom(); | |
486 | ||
487 | fd = openat(dirfd(d), de->d_name, O_RDONLY|O_CLOEXEC|O_NONBLOCK); | |
488 | if (fd < 0) { | |
489 | log_warning_errno(errno, "Failed to open %s/%s, ignoring: %m", dir, de->d_name); | |
490 | continue; | |
491 | } | |
492 | ||
493 | r = fd_verify_regular(fd); | |
494 | if (r < 0) { | |
495 | log_warning_errno(r, "File %s/%s is not regular, ignoring: %m", dir, de->d_name); | |
496 | continue; | |
497 | } | |
498 | ||
499 | r = find_sections(fd, &osrelease, &cmdline); | |
500 | if (r < 0) | |
501 | continue; | |
502 | ||
503 | j = path_join(dir, de->d_name); | |
504 | if (!j) | |
505 | return log_oom(); | |
506 | ||
507 | r = boot_entry_load_unified(root, j, osrelease, cmdline, *entries + *n_entries); | |
508 | if (r < 0) | |
509 | continue; | |
510 | ||
511 | (*n_entries) ++; | |
512 | } | |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
517 | static bool find_nonunique(BootEntry *entries, size_t n_entries, bool *arr) { | |
518 | size_t i, j; | |
519 | bool non_unique = false; | |
520 | ||
521 | assert(entries || n_entries == 0); | |
522 | assert(arr || n_entries == 0); | |
523 | ||
524 | for (i = 0; i < n_entries; i++) | |
525 | arr[i] = false; | |
526 | ||
527 | for (i = 0; i < n_entries; i++) | |
528 | for (j = 0; j < n_entries; j++) | |
529 | if (i != j && streq(boot_entry_title(entries + i), | |
530 | boot_entry_title(entries + j))) | |
531 | non_unique = arr[i] = arr[j] = true; | |
532 | ||
533 | return non_unique; | |
534 | } | |
535 | ||
536 | static int boot_entries_uniquify(BootEntry *entries, size_t n_entries) { | |
537 | char *s; | |
538 | size_t i; | |
539 | int r; | |
540 | bool arr[n_entries]; | |
541 | ||
542 | assert(entries || n_entries == 0); | |
543 | ||
544 | /* Find _all_ non-unique titles */ | |
545 | if (!find_nonunique(entries, n_entries, arr)) | |
546 | return 0; | |
547 | ||
548 | /* Add version to non-unique titles */ | |
549 | for (i = 0; i < n_entries; i++) | |
550 | if (arr[i] && entries[i].version) { | |
551 | r = asprintf(&s, "%s (%s)", boot_entry_title(entries + i), entries[i].version); | |
552 | if (r < 0) | |
553 | return -ENOMEM; | |
554 | ||
555 | free_and_replace(entries[i].show_title, s); | |
556 | } | |
557 | ||
558 | if (!find_nonunique(entries, n_entries, arr)) | |
559 | return 0; | |
560 | ||
561 | /* Add machine-id to non-unique titles */ | |
562 | for (i = 0; i < n_entries; i++) | |
563 | if (arr[i] && entries[i].machine_id) { | |
564 | r = asprintf(&s, "%s (%s)", boot_entry_title(entries + i), entries[i].machine_id); | |
565 | if (r < 0) | |
566 | return -ENOMEM; | |
567 | ||
568 | free_and_replace(entries[i].show_title, s); | |
569 | } | |
570 | ||
571 | if (!find_nonunique(entries, n_entries, arr)) | |
572 | return 0; | |
573 | ||
574 | /* Add file name to non-unique titles */ | |
575 | for (i = 0; i < n_entries; i++) | |
576 | if (arr[i]) { | |
577 | r = asprintf(&s, "%s (%s)", boot_entry_title(entries + i), entries[i].id); | |
578 | if (r < 0) | |
579 | return -ENOMEM; | |
580 | ||
581 | free_and_replace(entries[i].show_title, s); | |
582 | } | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | static int boot_entries_select_default(const BootConfig *config) { | |
588 | int i; | |
589 | ||
590 | assert(config); | |
591 | assert(config->entries || config->n_entries == 0); | |
592 | ||
593 | if (config->n_entries == 0) { | |
594 | log_debug("Found no default boot entry :("); | |
595 | return -1; /* -1 means "no default" */ | |
596 | } | |
597 | ||
598 | if (config->entry_oneshot) | |
599 | for (i = config->n_entries - 1; i >= 0; i--) | |
600 | if (streq(config->entry_oneshot, config->entries[i].id)) { | |
601 | log_debug("Found default: id \"%s\" is matched by LoaderEntryOneShot", | |
602 | config->entries[i].id); | |
603 | return i; | |
604 | } | |
605 | ||
606 | if (config->entry_default) | |
607 | for (i = config->n_entries - 1; i >= 0; i--) | |
608 | if (streq(config->entry_default, config->entries[i].id)) { | |
609 | log_debug("Found default: id \"%s\" is matched by LoaderEntryDefault", | |
610 | config->entries[i].id); | |
611 | return i; | |
612 | } | |
613 | ||
614 | if (config->default_pattern) | |
615 | for (i = config->n_entries - 1; i >= 0; i--) | |
616 | if (fnmatch(config->default_pattern, config->entries[i].id, FNM_CASEFOLD) == 0) { | |
617 | log_debug("Found default: id \"%s\" is matched by pattern \"%s\"", | |
618 | config->entries[i].id, config->default_pattern); | |
619 | return i; | |
620 | } | |
621 | ||
622 | log_debug("Found default: last entry \"%s\"", config->entries[config->n_entries - 1].id); | |
623 | return config->n_entries - 1; | |
624 | } | |
625 | ||
626 | int boot_entries_load_config( | |
627 | const char *esp_path, | |
628 | const char *xbootldr_path, | |
629 | BootConfig *config) { | |
630 | ||
631 | const char *p; | |
632 | int r; | |
633 | ||
634 | assert(config); | |
635 | ||
636 | if (esp_path) { | |
637 | p = strjoina(esp_path, "/loader/loader.conf"); | |
638 | r = boot_loader_read_conf(p, config); | |
639 | if (r < 0) | |
640 | return r; | |
641 | ||
642 | p = strjoina(esp_path, "/loader/entries"); | |
643 | r = boot_entries_find(esp_path, p, &config->entries, &config->n_entries); | |
644 | if (r < 0) | |
645 | return r; | |
646 | ||
647 | p = strjoina(esp_path, "/EFI/Linux/"); | |
648 | r = boot_entries_find_unified(esp_path, p, &config->entries, &config->n_entries); | |
649 | if (r < 0) | |
650 | return r; | |
651 | } | |
652 | ||
653 | if (xbootldr_path) { | |
654 | p = strjoina(xbootldr_path, "/loader/entries"); | |
655 | r = boot_entries_find(xbootldr_path, p, &config->entries, &config->n_entries); | |
656 | if (r < 0) | |
657 | return r; | |
658 | ||
659 | p = strjoina(xbootldr_path, "/EFI/Linux/"); | |
660 | r = boot_entries_find_unified(xbootldr_path, p, &config->entries, &config->n_entries); | |
661 | if (r < 0) | |
662 | return r; | |
663 | } | |
664 | ||
665 | typesafe_qsort(config->entries, config->n_entries, boot_entry_compare); | |
666 | ||
667 | r = boot_entries_uniquify(config->entries, config->n_entries); | |
668 | if (r < 0) | |
669 | return log_error_errno(r, "Failed to uniquify boot entries: %m"); | |
670 | ||
671 | if (is_efi_boot()) { | |
672 | r = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderEntryOneShot", &config->entry_oneshot); | |
673 | if (r < 0 && !IN_SET(r, -ENOENT, -ENODATA)) { | |
674 | log_warning_errno(r, "Failed to read EFI variable \"LoaderEntryOneShot\": %m"); | |
675 | if (r == -ENOMEM) | |
676 | return r; | |
677 | } | |
678 | ||
679 | r = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderEntryDefault", &config->entry_default); | |
680 | if (r < 0 && !IN_SET(r, -ENOENT, -ENODATA)) { | |
681 | log_warning_errno(r, "Failed to read EFI variable \"LoaderEntryDefault\": %m"); | |
682 | if (r == -ENOMEM) | |
683 | return r; | |
684 | } | |
685 | } | |
686 | ||
687 | config->default_entry = boot_entries_select_default(config); | |
688 | return 0; | |
689 | } | |
690 | ||
691 | int boot_entries_load_config_auto( | |
692 | const char *override_esp_path, | |
693 | const char *override_xbootldr_path, | |
694 | BootConfig *config) { | |
695 | ||
696 | _cleanup_free_ char *esp_where = NULL, *xbootldr_where = NULL; | |
697 | int r; | |
698 | ||
699 | assert(config); | |
700 | ||
701 | /* This function is similar to boot_entries_load_config(), however we automatically search for the | |
702 | * ESP and the XBOOTLDR partition unless it is explicitly specified. Also, if the user did not pass | |
703 | * an ESP or XBOOTLDR path directly, let's see if /run/boot-loader-entries/ exists. If so, let's | |
704 | * read data from there, as if it was an ESP (i.e. loading both entries and loader.conf data from | |
705 | * it). This allows other boot loaders to pass boot loader entry information to our tools if they | |
706 | * want to. */ | |
707 | ||
708 | if (!override_esp_path && !override_xbootldr_path) { | |
709 | if (access("/run/boot-loader-entries/", F_OK) >= 0) | |
710 | return boot_entries_load_config("/run/boot-loader-entries/", NULL, config); | |
711 | ||
712 | if (errno != ENOENT) | |
713 | return log_error_errno(errno, | |
714 | "Failed to determine whether /run/boot-loader-entries/ exists: %m"); | |
715 | } | |
716 | ||
717 | r = find_esp_and_warn(override_esp_path, false, &esp_where, NULL, NULL, NULL, NULL); | |
718 | if (r < 0) /* we don't log about ENOKEY here, but propagate it, leaving it to the caller to log */ | |
719 | return r; | |
720 | ||
721 | r = find_xbootldr_and_warn(override_xbootldr_path, false, &xbootldr_where, NULL); | |
722 | if (r < 0 && r != -ENOKEY) | |
723 | return r; /* It's fine if the XBOOTLDR partition doesn't exist, hence we ignore ENOKEY here */ | |
724 | ||
725 | return boot_entries_load_config(esp_where, xbootldr_where, config); | |
726 | } | |
727 | ||
728 | int boot_entries_augment_from_loader(BootConfig *config, bool only_auto) { | |
729 | ||
730 | static const char * const title_table[] = { | |
731 | /* Pretty names for a few well-known automatically discovered entries. */ | |
732 | "auto-osx", "macOS", | |
733 | "auto-windows", "Windows Boot Manager", | |
734 | "auto-efi-shell", "EFI Shell", | |
735 | "auto-efi-default", "EFI Default Loader", | |
736 | "auto-reboot-to-firmware-setup", "Reboot Into Firmware Interface", | |
737 | }; | |
738 | ||
739 | _cleanup_strv_free_ char **found_by_loader = NULL; | |
740 | size_t n_allocated; | |
741 | char **i; | |
742 | int r; | |
743 | ||
744 | assert(config); | |
745 | ||
746 | /* Let's add the entries discovered by the boot loader to the end of our list, unless they are | |
747 | * already included there. */ | |
748 | ||
749 | r = efi_loader_get_entries(&found_by_loader); | |
750 | if (IN_SET(r, -ENOENT, -EOPNOTSUPP)) | |
751 | return log_debug_errno(r, "Boot loader reported no entries."); | |
752 | if (r < 0) | |
753 | return log_error_errno(r, "Failed to determine entries reported by boot loader: %m"); | |
754 | ||
755 | n_allocated = config->n_entries; | |
756 | ||
757 | STRV_FOREACH(i, found_by_loader) { | |
758 | _cleanup_free_ char *c = NULL, *t = NULL, *p = NULL; | |
759 | char **a, **b; | |
760 | ||
761 | if (boot_config_has_entry(config, *i)) | |
762 | continue; | |
763 | ||
764 | if (only_auto && !startswith(*i, "auto-")) | |
765 | continue; | |
766 | ||
767 | c = strdup(*i); | |
768 | if (!c) | |
769 | return log_oom(); | |
770 | ||
771 | STRV_FOREACH_PAIR(a, b, (char**) title_table) | |
772 | if (streq(*a, *i)) { | |
773 | t = strdup(*b); | |
774 | if (!t) | |
775 | return log_oom(); | |
776 | break; | |
777 | } | |
778 | ||
779 | p = efi_variable_path(EFI_VENDOR_LOADER, "LoaderEntries"); | |
780 | if (!p) | |
781 | return log_oom(); | |
782 | ||
783 | if (!GREEDY_REALLOC0(config->entries, n_allocated, config->n_entries + 1)) | |
784 | return log_oom(); | |
785 | ||
786 | config->entries[config->n_entries++] = (BootEntry) { | |
787 | .type = BOOT_ENTRY_LOADER, | |
788 | .id = TAKE_PTR(c), | |
789 | .title = TAKE_PTR(t), | |
790 | .path = TAKE_PTR(p), | |
791 | }; | |
792 | } | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
797 | /********************************************************************************/ | |
798 | ||
799 | static int verify_esp_blkid( | |
800 | dev_t devid, | |
801 | bool searching, | |
802 | uint32_t *ret_part, | |
803 | uint64_t *ret_pstart, | |
804 | uint64_t *ret_psize, | |
805 | sd_id128_t *ret_uuid) { | |
806 | ||
807 | sd_id128_t uuid = SD_ID128_NULL; | |
808 | uint64_t pstart = 0, psize = 0; | |
809 | uint32_t part = 0; | |
810 | ||
811 | #if HAVE_BLKID | |
812 | _cleanup_(blkid_free_probep) blkid_probe b = NULL; | |
813 | _cleanup_free_ char *node = NULL; | |
814 | const char *v; | |
815 | int r; | |
816 | ||
817 | r = device_path_make_major_minor(S_IFBLK, devid, &node); | |
818 | if (r < 0) | |
819 | return log_error_errno(r, "Failed to format major/minor device path: %m"); | |
820 | ||
821 | errno = 0; | |
822 | b = blkid_new_probe_from_filename(node); | |
823 | if (!b) | |
824 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(ENOMEM), "Failed to open file system \"%s\": %m", node); | |
825 | ||
826 | blkid_probe_enable_superblocks(b, 1); | |
827 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE); | |
828 | blkid_probe_enable_partitions(b, 1); | |
829 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
830 | ||
831 | errno = 0; | |
832 | r = blkid_do_safeprobe(b); | |
833 | if (r == -2) | |
834 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "File system \"%s\" is ambiguous.", node); | |
835 | else if (r == 1) | |
836 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "File system \"%s\" does not contain a label.", node); | |
837 | else if (r != 0) | |
838 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe file system \"%s\": %m", node); | |
839 | ||
840 | errno = 0; | |
841 | r = blkid_probe_lookup_value(b, "TYPE", &v, NULL); | |
842 | if (r != 0) | |
843 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe file system type of \"%s\": %m", node); | |
844 | if (!streq(v, "vfat")) | |
845 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
846 | SYNTHETIC_ERRNO(searching ? EADDRNOTAVAIL : ENODEV), | |
847 | "File system \"%s\" is not FAT.", node); | |
848 | ||
849 | errno = 0; | |
850 | r = blkid_probe_lookup_value(b, "PART_ENTRY_SCHEME", &v, NULL); | |
851 | if (r != 0) | |
852 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe partition scheme of \"%s\": %m", node); | |
853 | if (!streq(v, "gpt")) | |
854 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
855 | SYNTHETIC_ERRNO(searching ? EADDRNOTAVAIL : ENODEV), | |
856 | "File system \"%s\" is not on a GPT partition table.", node); | |
857 | ||
858 | errno = 0; | |
859 | r = blkid_probe_lookup_value(b, "PART_ENTRY_TYPE", &v, NULL); | |
860 | if (r != 0) | |
861 | return log_error_errno(errno ?: EIO, "Failed to probe partition type UUID of \"%s\": %m", node); | |
862 | if (!streq(v, "c12a7328-f81f-11d2-ba4b-00a0c93ec93b")) | |
863 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
864 | SYNTHETIC_ERRNO(searching ? EADDRNOTAVAIL : ENODEV), | |
865 | "File system \"%s\" has wrong type for an EFI System Partition (ESP).", node); | |
866 | ||
867 | errno = 0; | |
868 | r = blkid_probe_lookup_value(b, "PART_ENTRY_UUID", &v, NULL); | |
869 | if (r != 0) | |
870 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe partition entry UUID of \"%s\": %m", node); | |
871 | r = sd_id128_from_string(v, &uuid); | |
872 | if (r < 0) | |
873 | return log_error_errno(r, "Partition \"%s\" has invalid UUID \"%s\".", node, v); | |
874 | ||
875 | errno = 0; | |
876 | r = blkid_probe_lookup_value(b, "PART_ENTRY_NUMBER", &v, NULL); | |
877 | if (r != 0) | |
878 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe partition number of \"%s\": m", node); | |
879 | r = safe_atou32(v, &part); | |
880 | if (r < 0) | |
881 | return log_error_errno(r, "Failed to parse PART_ENTRY_NUMBER field."); | |
882 | ||
883 | errno = 0; | |
884 | r = blkid_probe_lookup_value(b, "PART_ENTRY_OFFSET", &v, NULL); | |
885 | if (r != 0) | |
886 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe partition offset of \"%s\": %m", node); | |
887 | r = safe_atou64(v, &pstart); | |
888 | if (r < 0) | |
889 | return log_error_errno(r, "Failed to parse PART_ENTRY_OFFSET field."); | |
890 | ||
891 | errno = 0; | |
892 | r = blkid_probe_lookup_value(b, "PART_ENTRY_SIZE", &v, NULL); | |
893 | if (r != 0) | |
894 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe partition size of \"%s\": %m", node); | |
895 | r = safe_atou64(v, &psize); | |
896 | if (r < 0) | |
897 | return log_error_errno(r, "Failed to parse PART_ENTRY_SIZE field."); | |
898 | #endif | |
899 | ||
900 | if (ret_part) | |
901 | *ret_part = part; | |
902 | if (ret_pstart) | |
903 | *ret_pstart = pstart; | |
904 | if (ret_psize) | |
905 | *ret_psize = psize; | |
906 | if (ret_uuid) | |
907 | *ret_uuid = uuid; | |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
912 | static int verify_esp_udev( | |
913 | dev_t devid, | |
914 | bool searching, | |
915 | uint32_t *ret_part, | |
916 | uint64_t *ret_pstart, | |
917 | uint64_t *ret_psize, | |
918 | sd_id128_t *ret_uuid) { | |
919 | ||
920 | _cleanup_(sd_device_unrefp) sd_device *d = NULL; | |
921 | _cleanup_free_ char *node = NULL; | |
922 | sd_id128_t uuid = SD_ID128_NULL; | |
923 | uint64_t pstart = 0, psize = 0; | |
924 | uint32_t part = 0; | |
925 | const char *v; | |
926 | int r; | |
927 | ||
928 | r = device_path_make_major_minor(S_IFBLK, devid, &node); | |
929 | if (r < 0) | |
930 | return log_error_errno(r, "Failed to format major/minor device path: %m"); | |
931 | ||
932 | r = sd_device_new_from_devnum(&d, 'b', devid); | |
933 | if (r < 0) | |
934 | return log_error_errno(r, "Failed to get device from device number: %m"); | |
935 | ||
936 | r = sd_device_get_property_value(d, "ID_FS_TYPE", &v); | |
937 | if (r < 0) | |
938 | return log_error_errno(r, "Failed to get device property: %m"); | |
939 | if (!streq(v, "vfat")) | |
940 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
941 | SYNTHETIC_ERRNO(searching ? EADDRNOTAVAIL : ENODEV), | |
942 | "File system \"%s\" is not FAT.", node ); | |
943 | ||
944 | r = sd_device_get_property_value(d, "ID_PART_ENTRY_SCHEME", &v); | |
945 | if (r < 0) | |
946 | return log_error_errno(r, "Failed to get device property: %m"); | |
947 | if (!streq(v, "gpt")) | |
948 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
949 | SYNTHETIC_ERRNO(searching ? EADDRNOTAVAIL : ENODEV), | |
950 | "File system \"%s\" is not on a GPT partition table.", node); | |
951 | ||
952 | r = sd_device_get_property_value(d, "ID_PART_ENTRY_TYPE", &v); | |
953 | if (r < 0) | |
954 | return log_error_errno(r, "Failed to get device property: %m"); | |
955 | if (!streq(v, "c12a7328-f81f-11d2-ba4b-00a0c93ec93b")) | |
956 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
957 | SYNTHETIC_ERRNO(searching ? EADDRNOTAVAIL : ENODEV), | |
958 | "File system \"%s\" has wrong type for an EFI System Partition (ESP).", node); | |
959 | ||
960 | r = sd_device_get_property_value(d, "ID_PART_ENTRY_UUID", &v); | |
961 | if (r < 0) | |
962 | return log_error_errno(r, "Failed to get device property: %m"); | |
963 | r = sd_id128_from_string(v, &uuid); | |
964 | if (r < 0) | |
965 | return log_error_errno(r, "Partition \"%s\" has invalid UUID \"%s\".", node, v); | |
966 | ||
967 | r = sd_device_get_property_value(d, "ID_PART_ENTRY_NUMBER", &v); | |
968 | if (r < 0) | |
969 | return log_error_errno(r, "Failed to get device property: %m"); | |
970 | r = safe_atou32(v, &part); | |
971 | if (r < 0) | |
972 | return log_error_errno(r, "Failed to parse PART_ENTRY_NUMBER field."); | |
973 | ||
974 | r = sd_device_get_property_value(d, "ID_PART_ENTRY_OFFSET", &v); | |
975 | if (r < 0) | |
976 | return log_error_errno(r, "Failed to get device property: %m"); | |
977 | r = safe_atou64(v, &pstart); | |
978 | if (r < 0) | |
979 | return log_error_errno(r, "Failed to parse PART_ENTRY_OFFSET field."); | |
980 | ||
981 | r = sd_device_get_property_value(d, "ID_PART_ENTRY_SIZE", &v); | |
982 | if (r < 0) | |
983 | return log_error_errno(r, "Failed to get device property: %m"); | |
984 | r = safe_atou64(v, &psize); | |
985 | if (r < 0) | |
986 | return log_error_errno(r, "Failed to parse PART_ENTRY_SIZE field."); | |
987 | ||
988 | if (ret_part) | |
989 | *ret_part = part; | |
990 | if (ret_pstart) | |
991 | *ret_pstart = pstart; | |
992 | if (ret_psize) | |
993 | *ret_psize = psize; | |
994 | if (ret_uuid) | |
995 | *ret_uuid = uuid; | |
996 | ||
997 | return 0; | |
998 | } | |
999 | ||
1000 | static int verify_fsroot_dir( | |
1001 | const char *path, | |
1002 | bool searching, | |
1003 | bool unprivileged_mode, | |
1004 | dev_t *ret_dev) { | |
1005 | ||
1006 | struct stat st, st2; | |
1007 | const char *t2, *trigger; | |
1008 | int r; | |
1009 | ||
1010 | assert(path); | |
1011 | assert(ret_dev); | |
1012 | ||
1013 | /* So, the ESP and XBOOTLDR partition are commonly located on an autofs mount. stat() on the | |
1014 | * directory won't trigger it, if it is not mounted yet. Let's hence explicitly trigger it here, | |
1015 | * before stat()ing */ | |
1016 | trigger = strjoina(path, "/trigger"); /* Filename doesn't matter... */ | |
1017 | (void) access(trigger, F_OK); | |
1018 | ||
1019 | if (stat(path, &st) < 0) | |
1020 | return log_full_errno((searching && errno == ENOENT) || | |
1021 | (unprivileged_mode && errno == EACCES) ? LOG_DEBUG : LOG_ERR, errno, | |
1022 | "Failed to determine block device node of \"%s\": %m", path); | |
1023 | ||
1024 | if (major(st.st_dev) == 0) | |
1025 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
1026 | SYNTHETIC_ERRNO(searching ? EADDRNOTAVAIL : ENODEV), | |
1027 | "Block device node of \"%s\" is invalid.", path); | |
1028 | ||
1029 | t2 = strjoina(path, "/.."); | |
1030 | if (stat(t2, &st2) < 0) { | |
1031 | if (errno != EACCES) | |
1032 | r = -errno; | |
1033 | else { | |
1034 | _cleanup_free_ char *parent = NULL; | |
1035 | ||
1036 | /* If going via ".." didn't work due to EACCESS, then let's determine the parent path | |
1037 | * directly instead. It's not as good, due to symlinks and such, but we can't do | |
1038 | * anything better here. */ | |
1039 | ||
1040 | parent = dirname_malloc(path); | |
1041 | if (!parent) | |
1042 | return log_oom(); | |
1043 | ||
1044 | if (stat(parent, &st2) < 0) | |
1045 | r = -errno; | |
1046 | else | |
1047 | r = 0; | |
1048 | } | |
1049 | ||
1050 | if (r < 0) | |
1051 | return log_full_errno(unprivileged_mode && r == -EACCES ? LOG_DEBUG : LOG_ERR, r, | |
1052 | "Failed to determine block device node of parent of \"%s\": %m", path); | |
1053 | } | |
1054 | ||
1055 | if (st.st_dev == st2.st_dev) | |
1056 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
1057 | SYNTHETIC_ERRNO(searching ? EADDRNOTAVAIL : ENODEV), | |
1058 | "Directory \"%s\" is not the root of the file system.", path); | |
1059 | ||
1060 | if (ret_dev) | |
1061 | *ret_dev = st.st_dev; | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | static int verify_esp( | |
1067 | const char *p, | |
1068 | bool searching, | |
1069 | bool unprivileged_mode, | |
1070 | uint32_t *ret_part, | |
1071 | uint64_t *ret_pstart, | |
1072 | uint64_t *ret_psize, | |
1073 | sd_id128_t *ret_uuid) { | |
1074 | ||
1075 | bool relax_checks; | |
1076 | dev_t devid; | |
1077 | int r; | |
1078 | ||
1079 | assert(p); | |
1080 | ||
1081 | /* This logs about all errors, except: | |
1082 | * | |
1083 | * -ENOENT → if 'searching' is set, and the dir doesn't exist | |
1084 | * -EADDRNOTAVAIL → if 'searching' is set, and the dir doesn't look like an ESP | |
1085 | * -EACESS → if 'unprivileged_mode' is set, and we have trouble acessing the thing | |
1086 | */ | |
1087 | ||
1088 | relax_checks = getenv_bool("SYSTEMD_RELAX_ESP_CHECKS") > 0; | |
1089 | ||
1090 | /* Non-root user can only check the status, so if an error occured in the following, it does not cause any | |
1091 | * issues. Let's also, silence the error messages. */ | |
1092 | ||
1093 | if (!relax_checks) { | |
1094 | struct statfs sfs; | |
1095 | ||
1096 | if (statfs(p, &sfs) < 0) | |
1097 | /* If we are searching for the mount point, don't generate a log message if we can't find the path */ | |
1098 | return log_full_errno((searching && errno == ENOENT) || | |
1099 | (unprivileged_mode && errno == EACCES) ? LOG_DEBUG : LOG_ERR, errno, | |
1100 | "Failed to check file system type of \"%s\": %m", p); | |
1101 | ||
1102 | if (!F_TYPE_EQUAL(sfs.f_type, MSDOS_SUPER_MAGIC)) | |
1103 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
1104 | SYNTHETIC_ERRNO(searching ? EADDRNOTAVAIL : ENODEV), | |
1105 | "File system \"%s\" is not a FAT EFI System Partition (ESP) file system.", p); | |
1106 | } | |
1107 | ||
1108 | r = verify_fsroot_dir(p, searching, unprivileged_mode, &devid); | |
1109 | if (r < 0) | |
1110 | return r; | |
1111 | ||
1112 | /* In a container we don't have access to block devices, skip this part of the verification, we trust | |
1113 | * the container manager set everything up correctly on its own. */ | |
1114 | if (detect_container() > 0 || relax_checks) | |
1115 | goto finish; | |
1116 | ||
1117 | /* If we are unprivileged we ask udev for the metadata about the partition. If we are privileged we | |
1118 | * use blkid instead. Why? Because this code is called from 'bootctl' which is pretty much an | |
1119 | * emergency recovery tool that should also work when udev isn't up (i.e. from the emergency shell), | |
1120 | * however blkid can't work if we have no privileges to access block devices directly, which is why | |
1121 | * we use udev in that case. */ | |
1122 | if (unprivileged_mode) | |
1123 | return verify_esp_udev(devid, searching, ret_part, ret_pstart, ret_psize, ret_uuid); | |
1124 | else | |
1125 | return verify_esp_blkid(devid, searching, ret_part, ret_pstart, ret_psize, ret_uuid); | |
1126 | ||
1127 | finish: | |
1128 | if (ret_part) | |
1129 | *ret_part = 0; | |
1130 | if (ret_pstart) | |
1131 | *ret_pstart = 0; | |
1132 | if (ret_psize) | |
1133 | *ret_psize = 0; | |
1134 | if (ret_uuid) | |
1135 | *ret_uuid = SD_ID128_NULL; | |
1136 | ||
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | int find_esp_and_warn( | |
1141 | const char *path, | |
1142 | bool unprivileged_mode, | |
1143 | char **ret_path, | |
1144 | uint32_t *ret_part, | |
1145 | uint64_t *ret_pstart, | |
1146 | uint64_t *ret_psize, | |
1147 | sd_id128_t *ret_uuid) { | |
1148 | ||
1149 | int r; | |
1150 | ||
1151 | /* This logs about all errors except: | |
1152 | * | |
1153 | * -ENOKEY → when we can't find the partition | |
1154 | * -EACCESS → when unprivileged_mode is true, and we can't access something | |
1155 | */ | |
1156 | ||
1157 | if (path) { | |
1158 | r = verify_esp(path, false, unprivileged_mode, ret_part, ret_pstart, ret_psize, ret_uuid); | |
1159 | if (r < 0) | |
1160 | return r; | |
1161 | ||
1162 | goto found; | |
1163 | } | |
1164 | ||
1165 | path = getenv("SYSTEMD_ESP_PATH"); | |
1166 | if (path) { | |
1167 | if (!path_is_valid(path) || !path_is_absolute(path)) | |
1168 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1169 | "$SYSTEMD_ESP_PATH does not refer to absolute path, refusing to use it: %s", | |
1170 | path); | |
1171 | ||
1172 | /* Note: when the user explicitly configured things with an env var we won't validate the mount | |
1173 | * point. After all we want this to be useful for testing. */ | |
1174 | goto found; | |
1175 | } | |
1176 | ||
1177 | FOREACH_STRING(path, "/efi", "/boot", "/boot/efi") { | |
1178 | ||
1179 | r = verify_esp(path, true, unprivileged_mode, ret_part, ret_pstart, ret_psize, ret_uuid); | |
1180 | if (r >= 0) | |
1181 | goto found; | |
1182 | if (!IN_SET(r, -ENOENT, -EADDRNOTAVAIL)) /* This one is not it */ | |
1183 | return r; | |
1184 | } | |
1185 | ||
1186 | /* No logging here */ | |
1187 | return -ENOKEY; | |
1188 | ||
1189 | found: | |
1190 | if (ret_path) { | |
1191 | char *c; | |
1192 | ||
1193 | c = strdup(path); | |
1194 | if (!c) | |
1195 | return log_oom(); | |
1196 | ||
1197 | *ret_path = c; | |
1198 | } | |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | static int verify_xbootldr_blkid( | |
1204 | dev_t devid, | |
1205 | bool searching, | |
1206 | sd_id128_t *ret_uuid) { | |
1207 | ||
1208 | sd_id128_t uuid = SD_ID128_NULL; | |
1209 | ||
1210 | #if HAVE_BLKID | |
1211 | _cleanup_(blkid_free_probep) blkid_probe b = NULL; | |
1212 | _cleanup_free_ char *node = NULL; | |
1213 | const char *v; | |
1214 | int r; | |
1215 | ||
1216 | r = device_path_make_major_minor(S_IFBLK, devid, &node); | |
1217 | if (r < 0) | |
1218 | return log_error_errno(r, "Failed to format major/minor device path: %m"); | |
1219 | errno = 0; | |
1220 | b = blkid_new_probe_from_filename(node); | |
1221 | if (!b) | |
1222 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(ENOMEM), "Failed to open file system \"%s\": %m", node); | |
1223 | ||
1224 | blkid_probe_enable_partitions(b, 1); | |
1225 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
1226 | ||
1227 | errno = 0; | |
1228 | r = blkid_do_safeprobe(b); | |
1229 | if (r == -2) | |
1230 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "File system \"%s\" is ambiguous.", node); | |
1231 | else if (r == 1) | |
1232 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "File system \"%s\" does not contain a label.", node); | |
1233 | else if (r != 0) | |
1234 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe file system \"%s\": %m", node); | |
1235 | ||
1236 | errno = 0; | |
1237 | r = blkid_probe_lookup_value(b, "PART_ENTRY_SCHEME", &v, NULL); | |
1238 | if (r != 0) | |
1239 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe partition scheme of \"%s\": %m", node); | |
1240 | if (streq(v, "gpt")) { | |
1241 | ||
1242 | errno = 0; | |
1243 | r = blkid_probe_lookup_value(b, "PART_ENTRY_TYPE", &v, NULL); | |
1244 | if (r != 0) | |
1245 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe partition type UUID of \"%s\": %m", node); | |
1246 | if (!streq(v, "bc13c2ff-59e6-4262-a352-b275fd6f7172")) | |
1247 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
1248 | searching ? SYNTHETIC_ERRNO(EADDRNOTAVAIL) : SYNTHETIC_ERRNO(ENODEV), | |
1249 | "File system \"%s\" has wrong type for extended boot loader partition.", node); | |
1250 | ||
1251 | errno = 0; | |
1252 | r = blkid_probe_lookup_value(b, "PART_ENTRY_UUID", &v, NULL); | |
1253 | if (r != 0) | |
1254 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe partition entry UUID of \"%s\": %m", node); | |
1255 | r = sd_id128_from_string(v, &uuid); | |
1256 | if (r < 0) | |
1257 | return log_error_errno(r, "Partition \"%s\" has invalid UUID \"%s\".", node, v); | |
1258 | ||
1259 | } else if (streq(v, "dos")) { | |
1260 | ||
1261 | errno = 0; | |
1262 | r = blkid_probe_lookup_value(b, "PART_ENTRY_TYPE", &v, NULL); | |
1263 | if (r != 0) | |
1264 | return log_error_errno(errno ?: SYNTHETIC_ERRNO(EIO), "Failed to probe partition type UUID of \"%s\": %m", node); | |
1265 | if (!streq(v, "0xea")) | |
1266 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
1267 | searching ? SYNTHETIC_ERRNO(EADDRNOTAVAIL) : SYNTHETIC_ERRNO(ENODEV), | |
1268 | "File system \"%s\" has wrong type for extended boot loader partition.", node); | |
1269 | ||
1270 | } else | |
1271 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
1272 | searching ? SYNTHETIC_ERRNO(EADDRNOTAVAIL) : SYNTHETIC_ERRNO(ENODEV), | |
1273 | "File system \"%s\" is not on a GPT or DOS partition table.", node); | |
1274 | #endif | |
1275 | ||
1276 | if (ret_uuid) | |
1277 | *ret_uuid = uuid; | |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | static int verify_xbootldr_udev( | |
1283 | dev_t devid, | |
1284 | bool searching, | |
1285 | sd_id128_t *ret_uuid) { | |
1286 | ||
1287 | _cleanup_(sd_device_unrefp) sd_device *d = NULL; | |
1288 | _cleanup_free_ char *node = NULL; | |
1289 | sd_id128_t uuid = SD_ID128_NULL; | |
1290 | const char *v; | |
1291 | int r; | |
1292 | ||
1293 | r = device_path_make_major_minor(S_IFBLK, devid, &node); | |
1294 | if (r < 0) | |
1295 | return log_error_errno(r, "Failed to format major/minor device path: %m"); | |
1296 | ||
1297 | r = sd_device_new_from_devnum(&d, 'b', devid); | |
1298 | if (r < 0) | |
1299 | return log_error_errno(r, "Failed to get device from device number: %m"); | |
1300 | ||
1301 | r = sd_device_get_property_value(d, "ID_PART_ENTRY_SCHEME", &v); | |
1302 | if (r < 0) | |
1303 | return log_error_errno(r, "Failed to get device property: %m"); | |
1304 | ||
1305 | if (streq(v, "gpt")) { | |
1306 | ||
1307 | r = sd_device_get_property_value(d, "ID_PART_ENTRY_TYPE", &v); | |
1308 | if (r < 0) | |
1309 | return log_error_errno(r, "Failed to get device property: %m"); | |
1310 | if (!streq(v, "bc13c2ff-59e6-4262-a352-b275fd6f7172")) | |
1311 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
1312 | searching ? SYNTHETIC_ERRNO(EADDRNOTAVAIL) : SYNTHETIC_ERRNO(ENODEV), | |
1313 | "File system \"%s\" has wrong type for extended boot loader partition.", node); | |
1314 | ||
1315 | r = sd_device_get_property_value(d, "ID_PART_ENTRY_UUID", &v); | |
1316 | if (r < 0) | |
1317 | return log_error_errno(r, "Failed to get device property: %m"); | |
1318 | r = sd_id128_from_string(v, &uuid); | |
1319 | if (r < 0) | |
1320 | return log_error_errno(r, "Partition \"%s\" has invalid UUID \"%s\".", node, v); | |
1321 | ||
1322 | } else if (streq(v, "dos")) { | |
1323 | ||
1324 | r = sd_device_get_property_value(d, "ID_PART_ENTRY_TYPE", &v); | |
1325 | if (r < 0) | |
1326 | return log_error_errno(r, "Failed to get device property: %m"); | |
1327 | if (!streq(v, "0xea")) | |
1328 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
1329 | searching ? SYNTHETIC_ERRNO(EADDRNOTAVAIL) : SYNTHETIC_ERRNO(ENODEV), | |
1330 | "File system \"%s\" has wrong type for extended boot loader partition.", node); | |
1331 | } else | |
1332 | return log_full_errno(searching ? LOG_DEBUG : LOG_ERR, | |
1333 | searching ? SYNTHETIC_ERRNO(EADDRNOTAVAIL) : SYNTHETIC_ERRNO(ENODEV), | |
1334 | "File system \"%s\" is not on a GPT or DOS partition table.", node); | |
1335 | ||
1336 | if (ret_uuid) | |
1337 | *ret_uuid = uuid; | |
1338 | ||
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | static int verify_xbootldr( | |
1343 | const char *p, | |
1344 | bool searching, | |
1345 | bool unprivileged_mode, | |
1346 | sd_id128_t *ret_uuid) { | |
1347 | ||
1348 | bool relax_checks; | |
1349 | dev_t devid; | |
1350 | int r; | |
1351 | ||
1352 | assert(p); | |
1353 | ||
1354 | relax_checks = getenv_bool("SYSTEMD_RELAX_XBOOTLDR_CHECKS") > 0; | |
1355 | ||
1356 | r = verify_fsroot_dir(p, searching, unprivileged_mode, &devid); | |
1357 | if (r < 0) | |
1358 | return r; | |
1359 | ||
1360 | if (detect_container() > 0 || relax_checks) | |
1361 | goto finish; | |
1362 | ||
1363 | if (unprivileged_mode) | |
1364 | return verify_xbootldr_udev(devid, searching, ret_uuid); | |
1365 | else | |
1366 | return verify_xbootldr_blkid(devid, searching, ret_uuid); | |
1367 | ||
1368 | finish: | |
1369 | if (ret_uuid) | |
1370 | *ret_uuid = SD_ID128_NULL; | |
1371 | ||
1372 | return 0; | |
1373 | } | |
1374 | ||
1375 | int find_xbootldr_and_warn( | |
1376 | const char *path, | |
1377 | bool unprivileged_mode, | |
1378 | char **ret_path, | |
1379 | sd_id128_t *ret_uuid) { | |
1380 | ||
1381 | int r; | |
1382 | ||
1383 | /* Similar to find_esp_and_warn(), but finds the XBOOTLDR partition. Returns the same errors. */ | |
1384 | ||
1385 | if (path) { | |
1386 | r = verify_xbootldr(path, false, unprivileged_mode, ret_uuid); | |
1387 | if (r < 0) | |
1388 | return r; | |
1389 | ||
1390 | goto found; | |
1391 | } | |
1392 | ||
1393 | path = getenv("SYSTEMD_XBOOTLDR_PATH"); | |
1394 | if (path) { | |
1395 | if (!path_is_valid(path) || !path_is_absolute(path)) | |
1396 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1397 | "$SYSTEMD_XBOOTLDR_PATH does not refer to absolute path, refusing to use it: %s", | |
1398 | path); | |
1399 | ||
1400 | goto found; | |
1401 | } | |
1402 | ||
1403 | r = verify_xbootldr("/boot", true, unprivileged_mode, ret_uuid); | |
1404 | if (r >= 0) { | |
1405 | path = "/boot"; | |
1406 | goto found; | |
1407 | } | |
1408 | if (!IN_SET(r, -ENOENT, -EADDRNOTAVAIL)) /* This one is not it */ | |
1409 | return r; | |
1410 | ||
1411 | return -ENOKEY; | |
1412 | ||
1413 | found: | |
1414 | if (ret_path) { | |
1415 | char *c; | |
1416 | ||
1417 | c = strdup(path); | |
1418 | if (!c) | |
1419 | return log_oom(); | |
1420 | ||
1421 | *ret_path = c; | |
1422 | } | |
1423 | ||
1424 | return 0; | |
1425 | } |