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Commit | Line | Data |
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8c1be37e LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2016 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
18b5886e LP |
20 | #ifdef HAVE_LIBCRYPTSETUP |
21 | #include <libcryptsetup.h> | |
22 | #endif | |
23 | #include <linux/dm-ioctl.h> | |
8c1be37e LP |
24 | #include <sys/mount.h> |
25 | ||
26 | #include "architecture.h" | |
18b5886e | 27 | #include "ask-password-api.h" |
8c1be37e LP |
28 | #include "blkid-util.h" |
29 | #include "dissect-image.h" | |
18b5886e | 30 | #include "fd-util.h" |
78ebe980 | 31 | #include "fileio.h" |
2eedfd2d | 32 | #include "fs-util.h" |
8c1be37e | 33 | #include "gpt.h" |
78ebe980 | 34 | #include "hexdecoct.h" |
8c1be37e LP |
35 | #include "mount-util.h" |
36 | #include "path-util.h" | |
37 | #include "stat-util.h" | |
18b5886e | 38 | #include "stdio-util.h" |
8c1be37e LP |
39 | #include "string-table.h" |
40 | #include "string-util.h" | |
2eedfd2d | 41 | #include "strv.h" |
8c1be37e | 42 | #include "udev-util.h" |
41488e1f | 43 | #include "xattr-util.h" |
8c1be37e | 44 | |
18b5886e LP |
45 | static int probe_filesystem(const char *node, char **ret_fstype) { |
46 | #ifdef HAVE_BLKID | |
47 | _cleanup_blkid_free_probe_ blkid_probe b = NULL; | |
48 | const char *fstype; | |
49 | int r; | |
50 | ||
51 | b = blkid_new_probe_from_filename(node); | |
52 | if (!b) | |
53 | return -ENOMEM; | |
54 | ||
55 | blkid_probe_enable_superblocks(b, 1); | |
56 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE); | |
57 | ||
58 | errno = 0; | |
59 | r = blkid_do_safeprobe(b); | |
60 | if (r == -2 || r == 1) { | |
61 | log_debug("Failed to identify any partition type on partition %s", node); | |
62 | goto not_found; | |
63 | } | |
b382db9f ZJS |
64 | if (r != 0) |
65 | return -errno ?: -EIO; | |
18b5886e LP |
66 | |
67 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
68 | ||
69 | if (fstype) { | |
70 | char *t; | |
71 | ||
72 | t = strdup(fstype); | |
73 | if (!t) | |
74 | return -ENOMEM; | |
75 | ||
76 | *ret_fstype = t; | |
77 | return 1; | |
78 | } | |
79 | ||
80 | not_found: | |
81 | *ret_fstype = NULL; | |
82 | return 0; | |
83 | #else | |
84 | return -EOPNOTSUPP; | |
85 | #endif | |
86 | } | |
87 | ||
9b6deb03 | 88 | int dissect_image(int fd, const void *root_hash, size_t root_hash_size, DissectImageFlags flags, DissectedImage **ret) { |
8c1be37e LP |
89 | |
90 | #ifdef HAVE_BLKID | |
4623e8e6 | 91 | sd_id128_t root_uuid = SD_ID128_NULL, verity_uuid = SD_ID128_NULL; |
8c1be37e LP |
92 | _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; |
93 | bool is_gpt, is_mbr, generic_rw, multiple_generic = false; | |
94 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; | |
95 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; | |
96 | _cleanup_blkid_free_probe_ blkid_probe b = NULL; | |
97 | _cleanup_udev_unref_ struct udev *udev = NULL; | |
98 | _cleanup_free_ char *generic_node = NULL; | |
be30ad41 | 99 | sd_id128_t generic_uuid = SD_ID128_NULL; |
9b6deb03 | 100 | const char *pttype = NULL; |
8c1be37e LP |
101 | struct udev_list_entry *first, *item; |
102 | blkid_partlist pl; | |
103 | int r, generic_nr; | |
104 | struct stat st; | |
105 | unsigned i; | |
106 | ||
107 | assert(fd >= 0); | |
108 | assert(ret); | |
4623e8e6 | 109 | assert(root_hash || root_hash_size == 0); |
8c1be37e LP |
110 | |
111 | /* Probes a disk image, and returns information about what it found in *ret. | |
112 | * | |
4623e8e6 LP |
113 | * Returns -ENOPKG if no suitable partition table or file system could be found. |
114 | * Returns -EADDRNOTAVAIL if a root hash was specified but no matching root/verity partitions found. */ | |
115 | ||
116 | if (root_hash) { | |
117 | /* If a root hash is supplied, then we use the root partition that has a UUID that match the first | |
118 | * 128bit of the root hash. And we use the verity partition that has a UUID that match the final | |
119 | * 128bit. */ | |
120 | ||
121 | if (root_hash_size < sizeof(sd_id128_t)) | |
122 | return -EINVAL; | |
123 | ||
124 | memcpy(&root_uuid, root_hash, sizeof(sd_id128_t)); | |
125 | memcpy(&verity_uuid, (const uint8_t*) root_hash + root_hash_size - sizeof(sd_id128_t), sizeof(sd_id128_t)); | |
126 | ||
127 | if (sd_id128_is_null(root_uuid)) | |
128 | return -EINVAL; | |
129 | if (sd_id128_is_null(verity_uuid)) | |
130 | return -EINVAL; | |
131 | } | |
8c1be37e LP |
132 | |
133 | if (fstat(fd, &st) < 0) | |
134 | return -errno; | |
135 | ||
136 | if (!S_ISBLK(st.st_mode)) | |
137 | return -ENOTBLK; | |
138 | ||
139 | b = blkid_new_probe(); | |
140 | if (!b) | |
141 | return -ENOMEM; | |
142 | ||
143 | errno = 0; | |
144 | r = blkid_probe_set_device(b, fd, 0, 0); | |
b382db9f ZJS |
145 | if (r != 0) |
146 | return -errno ?: -ENOMEM; | |
8c1be37e | 147 | |
9b6deb03 LP |
148 | if ((flags & DISSECT_IMAGE_GPT_ONLY) == 0) { |
149 | /* Look for file system superblocks, unless we only shall look for GPT partition tables */ | |
150 | blkid_probe_enable_superblocks(b, 1); | |
151 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE|BLKID_SUBLKS_USAGE); | |
152 | } | |
153 | ||
8c1be37e LP |
154 | blkid_probe_enable_partitions(b, 1); |
155 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
156 | ||
157 | errno = 0; | |
158 | r = blkid_do_safeprobe(b); | |
159 | if (r == -2 || r == 1) { | |
160 | log_debug("Failed to identify any partition table."); | |
161 | return -ENOPKG; | |
162 | } | |
b382db9f ZJS |
163 | if (r != 0) |
164 | return -errno ?: -EIO; | |
8c1be37e LP |
165 | |
166 | m = new0(DissectedImage, 1); | |
167 | if (!m) | |
168 | return -ENOMEM; | |
169 | ||
e0f9e7bd LP |
170 | if (!(flags & DISSECT_IMAGE_GPT_ONLY) && |
171 | (flags & DISSECT_IMAGE_REQUIRE_ROOT)) { | |
9b6deb03 | 172 | const char *usage = NULL; |
8c1be37e | 173 | |
9b6deb03 LP |
174 | (void) blkid_probe_lookup_value(b, "USAGE", &usage, NULL); |
175 | if (STRPTR_IN_SET(usage, "filesystem", "crypto")) { | |
176 | _cleanup_free_ char *t = NULL, *n = NULL; | |
177 | const char *fstype = NULL; | |
8c1be37e | 178 | |
9b6deb03 LP |
179 | /* OK, we have found a file system, that's our root partition then. */ |
180 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
8c1be37e | 181 | |
9b6deb03 LP |
182 | if (fstype) { |
183 | t = strdup(fstype); | |
184 | if (!t) | |
185 | return -ENOMEM; | |
186 | } | |
187 | ||
188 | if (asprintf(&n, "/dev/block/%u:%u", major(st.st_rdev), minor(st.st_rdev)) < 0) | |
189 | return -ENOMEM; | |
8c1be37e | 190 | |
9b6deb03 LP |
191 | m->partitions[PARTITION_ROOT] = (DissectedPartition) { |
192 | .found = true, | |
193 | .rw = true, | |
194 | .partno = -1, | |
195 | .architecture = _ARCHITECTURE_INVALID, | |
196 | .fstype = t, | |
197 | .node = n, | |
198 | }; | |
8c1be37e | 199 | |
9b6deb03 | 200 | t = n = NULL; |
8c1be37e | 201 | |
9b6deb03 | 202 | m->encrypted = streq(fstype, "crypto_LUKS"); |
18b5886e | 203 | |
9b6deb03 LP |
204 | *ret = m; |
205 | m = NULL; | |
8c1be37e | 206 | |
9b6deb03 LP |
207 | return 0; |
208 | } | |
8c1be37e LP |
209 | } |
210 | ||
211 | (void) blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL); | |
212 | if (!pttype) | |
213 | return -ENOPKG; | |
214 | ||
215 | is_gpt = streq_ptr(pttype, "gpt"); | |
216 | is_mbr = streq_ptr(pttype, "dos"); | |
217 | ||
9b6deb03 | 218 | if (!is_gpt && ((flags & DISSECT_IMAGE_GPT_ONLY) || !is_mbr)) |
8c1be37e LP |
219 | return -ENOPKG; |
220 | ||
221 | errno = 0; | |
222 | pl = blkid_probe_get_partitions(b); | |
b382db9f ZJS |
223 | if (!pl) |
224 | return -errno ?: -ENOMEM; | |
8c1be37e LP |
225 | |
226 | udev = udev_new(); | |
227 | if (!udev) | |
228 | return -errno; | |
229 | ||
230 | d = udev_device_new_from_devnum(udev, 'b', st.st_rdev); | |
231 | if (!d) | |
232 | return -ENOMEM; | |
233 | ||
234 | for (i = 0;; i++) { | |
235 | int n, z; | |
236 | ||
237 | if (i >= 10) { | |
238 | log_debug("Kernel partitions never appeared."); | |
239 | return -ENXIO; | |
240 | } | |
241 | ||
242 | e = udev_enumerate_new(udev); | |
243 | if (!e) | |
244 | return -errno; | |
245 | ||
246 | r = udev_enumerate_add_match_parent(e, d); | |
247 | if (r < 0) | |
248 | return r; | |
249 | ||
250 | r = udev_enumerate_scan_devices(e); | |
251 | if (r < 0) | |
252 | return r; | |
253 | ||
254 | /* Count the partitions enumerated by the kernel */ | |
255 | n = 0; | |
256 | first = udev_enumerate_get_list_entry(e); | |
257 | udev_list_entry_foreach(item, first) | |
258 | n++; | |
259 | ||
260 | /* Count the partitions enumerated by blkid */ | |
261 | z = blkid_partlist_numof_partitions(pl); | |
262 | if (n == z + 1) | |
263 | break; | |
264 | if (n > z + 1) { | |
265 | log_debug("blkid and kernel partition list do not match."); | |
266 | return -EIO; | |
267 | } | |
268 | if (n < z + 1) { | |
269 | unsigned j; | |
270 | ||
271 | /* The kernel has probed fewer partitions than blkid? Maybe the kernel prober is still running | |
272 | * or it got EBUSY because udev already opened the device. Let's reprobe the device, which is a | |
273 | * synchronous call that waits until probing is complete. */ | |
274 | ||
275 | for (j = 0; j < 20; j++) { | |
276 | ||
277 | r = ioctl(fd, BLKRRPART, 0); | |
278 | if (r < 0) | |
279 | r = -errno; | |
280 | if (r >= 0 || r != -EBUSY) | |
281 | break; | |
282 | ||
283 | /* If something else has the device open, such as an udev rule, the ioctl will return | |
284 | * EBUSY. Since there's no way to wait until it isn't busy anymore, let's just wait a | |
285 | * bit, and try again. | |
286 | * | |
287 | * This is really something they should fix in the kernel! */ | |
288 | ||
289 | usleep(50 * USEC_PER_MSEC); | |
290 | } | |
291 | ||
292 | if (r < 0) | |
293 | return r; | |
294 | } | |
295 | ||
296 | e = udev_enumerate_unref(e); | |
297 | } | |
298 | ||
299 | first = udev_enumerate_get_list_entry(e); | |
300 | udev_list_entry_foreach(item, first) { | |
301 | _cleanup_udev_device_unref_ struct udev_device *q; | |
9b6deb03 | 302 | unsigned long long pflags; |
8c1be37e LP |
303 | blkid_partition pp; |
304 | const char *node; | |
305 | dev_t qn; | |
306 | int nr; | |
307 | ||
308 | q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)); | |
309 | if (!q) | |
310 | return -errno; | |
311 | ||
312 | qn = udev_device_get_devnum(q); | |
313 | if (major(qn) == 0) | |
314 | continue; | |
315 | ||
316 | if (st.st_rdev == qn) | |
317 | continue; | |
318 | ||
319 | node = udev_device_get_devnode(q); | |
320 | if (!node) | |
321 | continue; | |
322 | ||
323 | pp = blkid_partlist_devno_to_partition(pl, qn); | |
324 | if (!pp) | |
325 | continue; | |
326 | ||
9b6deb03 | 327 | pflags = blkid_partition_get_flags(pp); |
8c1be37e LP |
328 | |
329 | nr = blkid_partition_get_partno(pp); | |
330 | if (nr < 0) | |
331 | continue; | |
332 | ||
333 | if (is_gpt) { | |
334 | int designator = _PARTITION_DESIGNATOR_INVALID, architecture = _ARCHITECTURE_INVALID; | |
4623e8e6 LP |
335 | const char *stype, *sid, *fstype = NULL; |
336 | sd_id128_t type_id, id; | |
8c1be37e LP |
337 | bool rw = true; |
338 | ||
4623e8e6 LP |
339 | sid = blkid_partition_get_uuid(pp); |
340 | if (!sid) | |
341 | continue; | |
342 | if (sd_id128_from_string(sid, &id) < 0) | |
343 | continue; | |
344 | ||
8c1be37e LP |
345 | stype = blkid_partition_get_type_string(pp); |
346 | if (!stype) | |
347 | continue; | |
8c1be37e LP |
348 | if (sd_id128_from_string(stype, &type_id) < 0) |
349 | continue; | |
350 | ||
351 | if (sd_id128_equal(type_id, GPT_HOME)) { | |
a48dd347 LP |
352 | |
353 | if (pflags & GPT_FLAG_NO_AUTO) | |
354 | continue; | |
355 | ||
8c1be37e | 356 | designator = PARTITION_HOME; |
9b6deb03 | 357 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
8c1be37e | 358 | } else if (sd_id128_equal(type_id, GPT_SRV)) { |
a48dd347 LP |
359 | |
360 | if (pflags & GPT_FLAG_NO_AUTO) | |
361 | continue; | |
362 | ||
8c1be37e | 363 | designator = PARTITION_SRV; |
9b6deb03 | 364 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
8c1be37e | 365 | } else if (sd_id128_equal(type_id, GPT_ESP)) { |
a48dd347 LP |
366 | |
367 | /* Note that we don't check the GPT_FLAG_NO_AUTO flag for the ESP, as it is not defined | |
368 | * there. We instead check the GPT_FLAG_NO_BLOCK_IO_PROTOCOL, as recommended by the | |
369 | * UEFI spec (See "12.3.3 Number and Location of System Partitions"). */ | |
370 | ||
371 | if (pflags & GPT_FLAG_NO_BLOCK_IO_PROTOCOL) | |
372 | continue; | |
373 | ||
8c1be37e LP |
374 | designator = PARTITION_ESP; |
375 | fstype = "vfat"; | |
376 | } | |
377 | #ifdef GPT_ROOT_NATIVE | |
378 | else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE)) { | |
4623e8e6 | 379 | |
a48dd347 LP |
380 | if (pflags & GPT_FLAG_NO_AUTO) |
381 | continue; | |
382 | ||
4623e8e6 LP |
383 | /* If a root ID is specified, ignore everything but the root id */ |
384 | if (!sd_id128_is_null(root_uuid) && !sd_id128_equal(root_uuid, id)) | |
385 | continue; | |
386 | ||
8c1be37e LP |
387 | designator = PARTITION_ROOT; |
388 | architecture = native_architecture(); | |
9b6deb03 | 389 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
4f8b86e3 | 390 | } else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE_VERITY)) { |
4623e8e6 | 391 | |
a48dd347 LP |
392 | if (pflags & GPT_FLAG_NO_AUTO) |
393 | continue; | |
394 | ||
4623e8e6 LP |
395 | m->can_verity = true; |
396 | ||
397 | /* Ignore verity unless a root hash is specified */ | |
398 | if (sd_id128_is_null(verity_uuid) || !sd_id128_equal(verity_uuid, id)) | |
399 | continue; | |
400 | ||
401 | designator = PARTITION_ROOT_VERITY; | |
402 | fstype = "DM_verity_hash"; | |
403 | architecture = native_architecture(); | |
404 | rw = false; | |
405 | } | |
406 | #endif | |
8c1be37e LP |
407 | #ifdef GPT_ROOT_SECONDARY |
408 | else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY)) { | |
4623e8e6 | 409 | |
a48dd347 LP |
410 | if (pflags & GPT_FLAG_NO_AUTO) |
411 | continue; | |
412 | ||
4623e8e6 LP |
413 | /* If a root ID is specified, ignore everything but the root id */ |
414 | if (!sd_id128_is_null(root_uuid) && !sd_id128_equal(root_uuid, id)) | |
415 | continue; | |
416 | ||
8c1be37e LP |
417 | designator = PARTITION_ROOT_SECONDARY; |
418 | architecture = SECONDARY_ARCHITECTURE; | |
9b6deb03 | 419 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
4f8b86e3 | 420 | } else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY_VERITY)) { |
a48dd347 LP |
421 | |
422 | if (pflags & GPT_FLAG_NO_AUTO) | |
423 | continue; | |
424 | ||
4623e8e6 LP |
425 | m->can_verity = true; |
426 | ||
427 | /* Ignore verity unless root has is specified */ | |
428 | if (sd_id128_is_null(verity_uuid) || !sd_id128_equal(verity_uuid, id)) | |
429 | continue; | |
430 | ||
431 | designator = PARTITION_ROOT_SECONDARY_VERITY; | |
432 | fstype = "DM_verity_hash"; | |
433 | architecture = SECONDARY_ARCHITECTURE; | |
434 | rw = false; | |
435 | } | |
8c1be37e LP |
436 | #endif |
437 | else if (sd_id128_equal(type_id, GPT_SWAP)) { | |
a48dd347 LP |
438 | |
439 | if (pflags & GPT_FLAG_NO_AUTO) | |
440 | continue; | |
441 | ||
8c1be37e LP |
442 | designator = PARTITION_SWAP; |
443 | fstype = "swap"; | |
444 | } else if (sd_id128_equal(type_id, GPT_LINUX_GENERIC)) { | |
445 | ||
a48dd347 LP |
446 | if (pflags & GPT_FLAG_NO_AUTO) |
447 | continue; | |
448 | ||
8c1be37e LP |
449 | if (generic_node) |
450 | multiple_generic = true; | |
451 | else { | |
452 | generic_nr = nr; | |
9b6deb03 | 453 | generic_rw = !(pflags & GPT_FLAG_READ_ONLY); |
be30ad41 | 454 | generic_uuid = id; |
8c1be37e LP |
455 | generic_node = strdup(node); |
456 | if (!generic_node) | |
457 | return -ENOMEM; | |
458 | } | |
459 | } | |
460 | ||
461 | if (designator != _PARTITION_DESIGNATOR_INVALID) { | |
462 | _cleanup_free_ char *t = NULL, *n = NULL; | |
463 | ||
464 | /* First one wins */ | |
465 | if (m->partitions[designator].found) | |
466 | continue; | |
467 | ||
468 | if (fstype) { | |
469 | t = strdup(fstype); | |
470 | if (!t) | |
471 | return -ENOMEM; | |
472 | } | |
473 | ||
474 | n = strdup(node); | |
475 | if (!n) | |
476 | return -ENOMEM; | |
477 | ||
478 | m->partitions[designator] = (DissectedPartition) { | |
479 | .found = true, | |
480 | .partno = nr, | |
481 | .rw = rw, | |
482 | .architecture = architecture, | |
483 | .node = n, | |
484 | .fstype = t, | |
be30ad41 | 485 | .uuid = id, |
8c1be37e LP |
486 | }; |
487 | ||
488 | n = t = NULL; | |
489 | } | |
490 | ||
491 | } else if (is_mbr) { | |
492 | ||
9b6deb03 | 493 | if (pflags != 0x80) /* Bootable flag */ |
8c1be37e LP |
494 | continue; |
495 | ||
496 | if (blkid_partition_get_type(pp) != 0x83) /* Linux partition */ | |
497 | continue; | |
498 | ||
499 | if (generic_node) | |
500 | multiple_generic = true; | |
501 | else { | |
502 | generic_nr = nr; | |
503 | generic_rw = true; | |
504 | generic_node = strdup(node); | |
505 | if (!generic_node) | |
506 | return -ENOMEM; | |
507 | } | |
508 | } | |
509 | } | |
510 | ||
511 | if (!m->partitions[PARTITION_ROOT].found) { | |
512 | /* No root partition found? Then let's see if ther's one for the secondary architecture. And if not | |
513 | * either, then check if there's a single generic one, and use that. */ | |
514 | ||
4623e8e6 | 515 | if (m->partitions[PARTITION_ROOT_VERITY].found) |
e0f9e7bd | 516 | return -EADDRNOTAVAIL; |
4623e8e6 | 517 | |
8c1be37e LP |
518 | if (m->partitions[PARTITION_ROOT_SECONDARY].found) { |
519 | m->partitions[PARTITION_ROOT] = m->partitions[PARTITION_ROOT_SECONDARY]; | |
520 | zero(m->partitions[PARTITION_ROOT_SECONDARY]); | |
4623e8e6 LP |
521 | |
522 | m->partitions[PARTITION_ROOT_VERITY] = m->partitions[PARTITION_ROOT_SECONDARY_VERITY]; | |
523 | zero(m->partitions[PARTITION_ROOT_SECONDARY_VERITY]); | |
524 | ||
e0f9e7bd LP |
525 | } else if (flags & DISSECT_IMAGE_REQUIRE_ROOT) { |
526 | ||
527 | /* If the root has was set, then we won't fallback to a generic node, because the root hash | |
528 | * decides */ | |
529 | if (root_hash) | |
530 | return -EADDRNOTAVAIL; | |
8c1be37e | 531 | |
e0f9e7bd LP |
532 | /* If we didn't find a generic node, then we can't fix this up either */ |
533 | if (!generic_node) | |
534 | return -ENXIO; | |
535 | ||
536 | /* If we didn't find a properly marked root partition, but we did find a single suitable | |
537 | * generic Linux partition, then use this as root partition, if the caller asked for it. */ | |
8c1be37e LP |
538 | if (multiple_generic) |
539 | return -ENOTUNIQ; | |
540 | ||
541 | m->partitions[PARTITION_ROOT] = (DissectedPartition) { | |
542 | .found = true, | |
543 | .rw = generic_rw, | |
544 | .partno = generic_nr, | |
545 | .architecture = _ARCHITECTURE_INVALID, | |
546 | .node = generic_node, | |
be30ad41 | 547 | .uuid = generic_uuid, |
8c1be37e LP |
548 | }; |
549 | ||
550 | generic_node = NULL; | |
e0f9e7bd | 551 | } |
8c1be37e LP |
552 | } |
553 | ||
4623e8e6 | 554 | if (root_hash) { |
e0f9e7bd | 555 | if (!m->partitions[PARTITION_ROOT_VERITY].found || !m->partitions[PARTITION_ROOT].found) |
4623e8e6 LP |
556 | return -EADDRNOTAVAIL; |
557 | ||
558 | /* If we found the primary root with the hash, then we definitely want to suppress any secondary root | |
559 | * (which would be weird, after all the root hash should only be assigned to one pair of | |
560 | * partitions... */ | |
561 | m->partitions[PARTITION_ROOT_SECONDARY].found = false; | |
562 | m->partitions[PARTITION_ROOT_SECONDARY_VERITY].found = false; | |
563 | ||
564 | /* If we found a verity setup, then the root partition is necessarily read-only. */ | |
565 | m->partitions[PARTITION_ROOT].rw = false; | |
566 | ||
567 | m->verity = true; | |
568 | } | |
569 | ||
18b5886e LP |
570 | blkid_free_probe(b); |
571 | b = NULL; | |
572 | ||
8c1be37e LP |
573 | /* Fill in file system types if we don't know them yet. */ |
574 | for (i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) { | |
18b5886e | 575 | DissectedPartition *p = m->partitions + i; |
8c1be37e | 576 | |
18b5886e | 577 | if (!p->found) |
8c1be37e LP |
578 | continue; |
579 | ||
18b5886e LP |
580 | if (!p->fstype && p->node) { |
581 | r = probe_filesystem(p->node, &p->fstype); | |
582 | if (r < 0) | |
583 | return r; | |
8c1be37e LP |
584 | } |
585 | ||
18b5886e LP |
586 | if (streq_ptr(p->fstype, "crypto_LUKS")) |
587 | m->encrypted = true; | |
8c1be37e LP |
588 | } |
589 | ||
590 | *ret = m; | |
591 | m = NULL; | |
592 | ||
593 | return 0; | |
594 | #else | |
595 | return -EOPNOTSUPP; | |
596 | #endif | |
597 | } | |
598 | ||
599 | DissectedImage* dissected_image_unref(DissectedImage *m) { | |
600 | unsigned i; | |
601 | ||
602 | if (!m) | |
603 | return NULL; | |
604 | ||
605 | for (i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) { | |
606 | free(m->partitions[i].fstype); | |
607 | free(m->partitions[i].node); | |
18b5886e LP |
608 | free(m->partitions[i].decrypted_fstype); |
609 | free(m->partitions[i].decrypted_node); | |
8c1be37e LP |
610 | } |
611 | ||
612 | free(m); | |
613 | return NULL; | |
614 | } | |
615 | ||
18b5886e LP |
616 | static int is_loop_device(const char *path) { |
617 | char s[strlen("/sys/dev/block/") + DECIMAL_STR_MAX(dev_t) + 1 + DECIMAL_STR_MAX(dev_t) + strlen("/../loop/")]; | |
618 | struct stat st; | |
619 | ||
620 | assert(path); | |
621 | ||
622 | if (stat(path, &st) < 0) | |
623 | return -errno; | |
624 | ||
625 | if (!S_ISBLK(st.st_mode)) | |
626 | return -ENOTBLK; | |
627 | ||
628 | xsprintf(s, "/sys/dev/block/%u:%u/loop/", major(st.st_rdev), minor(st.st_rdev)); | |
629 | if (access(s, F_OK) < 0) { | |
630 | if (errno != ENOENT) | |
631 | return -errno; | |
632 | ||
633 | /* The device itself isn't a loop device, but maybe it's a partition and its parent is? */ | |
634 | xsprintf(s, "/sys/dev/block/%u:%u/../loop/", major(st.st_rdev), minor(st.st_rdev)); | |
635 | if (access(s, F_OK) < 0) | |
636 | return errno == ENOENT ? false : -errno; | |
637 | } | |
638 | ||
639 | return true; | |
640 | } | |
641 | ||
642 | static int mount_partition( | |
643 | DissectedPartition *m, | |
644 | const char *where, | |
645 | const char *directory, | |
646 | DissectImageFlags flags) { | |
647 | ||
648 | const char *p, *options = NULL, *node, *fstype; | |
2eedfd2d | 649 | _cleanup_free_ char *chased = NULL; |
8c1be37e | 650 | bool rw; |
2eedfd2d | 651 | int r; |
8c1be37e LP |
652 | |
653 | assert(m); | |
654 | assert(where); | |
655 | ||
18b5886e LP |
656 | node = m->decrypted_node ?: m->node; |
657 | fstype = m->decrypted_fstype ?: m->fstype; | |
658 | ||
659 | if (!m->found || !node || !fstype) | |
8c1be37e LP |
660 | return 0; |
661 | ||
18b5886e LP |
662 | /* Stacked encryption? Yuck */ |
663 | if (streq_ptr(fstype, "crypto_LUKS")) | |
664 | return -ELOOP; | |
665 | ||
666 | rw = m->rw && !(flags & DISSECT_IMAGE_READ_ONLY); | |
8c1be37e | 667 | |
2eedfd2d LP |
668 | if (directory) { |
669 | r = chase_symlinks(directory, where, CHASE_PREFIX_ROOT, &chased); | |
670 | if (r < 0) | |
671 | return r; | |
672 | ||
673 | p = chased; | |
674 | } else | |
8c1be37e LP |
675 | p = where; |
676 | ||
18b5886e LP |
677 | /* If requested, turn on discard support. */ |
678 | if (STR_IN_SET(fstype, "btrfs", "ext4", "vfat", "xfs") && | |
679 | ((flags & DISSECT_IMAGE_DISCARD) || | |
680 | ((flags & DISSECT_IMAGE_DISCARD_ON_LOOP) && is_loop_device(m->node)))) | |
681 | options = "discard"; | |
8c1be37e | 682 | |
18b5886e | 683 | return mount_verbose(LOG_DEBUG, node, p, fstype, MS_NODEV|(rw ? 0 : MS_RDONLY), options); |
8c1be37e LP |
684 | } |
685 | ||
18b5886e | 686 | int dissected_image_mount(DissectedImage *m, const char *where, DissectImageFlags flags) { |
8c1be37e LP |
687 | int r; |
688 | ||
689 | assert(m); | |
690 | assert(where); | |
691 | ||
692 | if (!m->partitions[PARTITION_ROOT].found) | |
693 | return -ENXIO; | |
694 | ||
695 | r = mount_partition(m->partitions + PARTITION_ROOT, where, NULL, flags); | |
696 | if (r < 0) | |
697 | return r; | |
698 | ||
699 | r = mount_partition(m->partitions + PARTITION_HOME, where, "/home", flags); | |
700 | if (r < 0) | |
701 | return r; | |
702 | ||
703 | r = mount_partition(m->partitions + PARTITION_SRV, where, "/srv", flags); | |
704 | if (r < 0) | |
705 | return r; | |
706 | ||
707 | if (m->partitions[PARTITION_ESP].found) { | |
2eedfd2d | 708 | const char *mp; |
8c1be37e LP |
709 | |
710 | /* Mount the ESP to /efi if it exists and is empty. If it doesn't exist, use /boot instead. */ | |
711 | ||
2eedfd2d LP |
712 | FOREACH_STRING(mp, "/efi", "/boot") { |
713 | _cleanup_free_ char *p = NULL; | |
714 | ||
715 | r = chase_symlinks(mp, where, CHASE_PREFIX_ROOT, &p); | |
8c1be37e | 716 | if (r < 0) |
2eedfd2d LP |
717 | continue; |
718 | ||
719 | r = dir_is_empty(p); | |
720 | if (r > 0) { | |
721 | r = mount_partition(m->partitions + PARTITION_ESP, where, mp, flags); | |
722 | if (r < 0) | |
723 | return r; | |
724 | } | |
8c1be37e LP |
725 | } |
726 | } | |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
18b5886e LP |
731 | #ifdef HAVE_LIBCRYPTSETUP |
732 | typedef struct DecryptedPartition { | |
733 | struct crypt_device *device; | |
734 | char *name; | |
735 | bool relinquished; | |
736 | } DecryptedPartition; | |
737 | ||
738 | struct DecryptedImage { | |
739 | DecryptedPartition *decrypted; | |
740 | size_t n_decrypted; | |
741 | size_t n_allocated; | |
742 | }; | |
743 | #endif | |
744 | ||
745 | DecryptedImage* decrypted_image_unref(DecryptedImage* d) { | |
746 | #ifdef HAVE_LIBCRYPTSETUP | |
747 | size_t i; | |
748 | int r; | |
749 | ||
750 | if (!d) | |
751 | return NULL; | |
752 | ||
753 | for (i = 0; i < d->n_decrypted; i++) { | |
754 | DecryptedPartition *p = d->decrypted + i; | |
755 | ||
756 | if (p->device && p->name && !p->relinquished) { | |
757 | r = crypt_deactivate(p->device, p->name); | |
758 | if (r < 0) | |
759 | log_debug_errno(r, "Failed to deactivate encrypted partition %s", p->name); | |
760 | } | |
761 | ||
762 | if (p->device) | |
763 | crypt_free(p->device); | |
764 | free(p->name); | |
765 | } | |
766 | ||
767 | free(d); | |
768 | #endif | |
769 | return NULL; | |
770 | } | |
771 | ||
772 | #ifdef HAVE_LIBCRYPTSETUP | |
4623e8e6 LP |
773 | |
774 | static int make_dm_name_and_node(const void *original_node, const char *suffix, char **ret_name, char **ret_node) { | |
775 | _cleanup_free_ char *name = NULL, *node = NULL; | |
776 | const char *base; | |
777 | ||
778 | assert(original_node); | |
779 | assert(suffix); | |
780 | assert(ret_name); | |
781 | assert(ret_node); | |
782 | ||
783 | base = strrchr(original_node, '/'); | |
784 | if (!base) | |
785 | return -EINVAL; | |
786 | base++; | |
787 | if (isempty(base)) | |
788 | return -EINVAL; | |
789 | ||
790 | name = strjoin(base, suffix); | |
791 | if (!name) | |
792 | return -ENOMEM; | |
793 | if (!filename_is_valid(name)) | |
794 | return -EINVAL; | |
795 | ||
796 | node = strjoin(crypt_get_dir(), "/", name); | |
797 | if (!node) | |
798 | return -ENOMEM; | |
799 | ||
800 | *ret_name = name; | |
801 | *ret_node = node; | |
802 | ||
803 | name = node = NULL; | |
804 | return 0; | |
805 | } | |
806 | ||
18b5886e LP |
807 | static int decrypt_partition( |
808 | DissectedPartition *m, | |
809 | const char *passphrase, | |
810 | DissectImageFlags flags, | |
811 | DecryptedImage *d) { | |
812 | ||
813 | _cleanup_free_ char *node = NULL, *name = NULL; | |
814 | struct crypt_device *cd; | |
18b5886e LP |
815 | int r; |
816 | ||
817 | assert(m); | |
818 | assert(d); | |
819 | ||
820 | if (!m->found || !m->node || !m->fstype) | |
821 | return 0; | |
822 | ||
823 | if (!streq(m->fstype, "crypto_LUKS")) | |
824 | return 0; | |
825 | ||
4623e8e6 LP |
826 | r = make_dm_name_and_node(m->node, "-decrypted", &name, &node); |
827 | if (r < 0) | |
828 | return r; | |
18b5886e LP |
829 | |
830 | if (!GREEDY_REALLOC0(d->decrypted, d->n_allocated, d->n_decrypted + 1)) | |
831 | return -ENOMEM; | |
832 | ||
833 | r = crypt_init(&cd, m->node); | |
834 | if (r < 0) | |
835 | return r; | |
836 | ||
837 | r = crypt_load(cd, CRYPT_LUKS1, NULL); | |
838 | if (r < 0) | |
839 | goto fail; | |
840 | ||
841 | r = crypt_activate_by_passphrase(cd, name, CRYPT_ANY_SLOT, passphrase, strlen(passphrase), | |
842 | ((flags & DISSECT_IMAGE_READ_ONLY) ? CRYPT_ACTIVATE_READONLY : 0) | | |
843 | ((flags & DISSECT_IMAGE_DISCARD_ON_CRYPTO) ? CRYPT_ACTIVATE_ALLOW_DISCARDS : 0)); | |
844 | if (r == -EPERM) { | |
845 | r = -EKEYREJECTED; | |
846 | goto fail; | |
847 | } | |
848 | if (r < 0) | |
849 | goto fail; | |
850 | ||
851 | d->decrypted[d->n_decrypted].name = name; | |
852 | name = NULL; | |
853 | ||
854 | d->decrypted[d->n_decrypted].device = cd; | |
855 | d->n_decrypted++; | |
856 | ||
857 | m->decrypted_node = node; | |
858 | node = NULL; | |
859 | ||
860 | return 0; | |
861 | ||
4623e8e6 LP |
862 | fail: |
863 | crypt_free(cd); | |
864 | return r; | |
865 | } | |
866 | ||
867 | static int verity_partition( | |
868 | DissectedPartition *m, | |
869 | DissectedPartition *v, | |
870 | const void *root_hash, | |
871 | size_t root_hash_size, | |
872 | DissectImageFlags flags, | |
873 | DecryptedImage *d) { | |
874 | ||
875 | _cleanup_free_ char *node = NULL, *name = NULL; | |
876 | struct crypt_device *cd; | |
877 | int r; | |
878 | ||
879 | assert(m); | |
880 | assert(v); | |
881 | ||
882 | if (!root_hash) | |
883 | return 0; | |
884 | ||
885 | if (!m->found || !m->node || !m->fstype) | |
886 | return 0; | |
887 | if (!v->found || !v->node || !v->fstype) | |
888 | return 0; | |
889 | ||
890 | if (!streq(v->fstype, "DM_verity_hash")) | |
891 | return 0; | |
892 | ||
893 | r = make_dm_name_and_node(m->node, "-verity", &name, &node); | |
894 | if (r < 0) | |
895 | return r; | |
896 | ||
897 | if (!GREEDY_REALLOC0(d->decrypted, d->n_allocated, d->n_decrypted + 1)) | |
898 | return -ENOMEM; | |
899 | ||
900 | r = crypt_init(&cd, v->node); | |
901 | if (r < 0) | |
902 | return r; | |
903 | ||
904 | r = crypt_load(cd, CRYPT_VERITY, NULL); | |
905 | if (r < 0) | |
906 | goto fail; | |
907 | ||
908 | r = crypt_set_data_device(cd, m->node); | |
909 | if (r < 0) | |
910 | goto fail; | |
911 | ||
912 | r = crypt_activate_by_volume_key(cd, name, root_hash, root_hash_size, CRYPT_ACTIVATE_READONLY); | |
913 | if (r < 0) | |
914 | goto fail; | |
915 | ||
916 | d->decrypted[d->n_decrypted].name = name; | |
917 | name = NULL; | |
918 | ||
919 | d->decrypted[d->n_decrypted].device = cd; | |
920 | d->n_decrypted++; | |
921 | ||
922 | m->decrypted_node = node; | |
923 | node = NULL; | |
924 | ||
925 | return 0; | |
926 | ||
18b5886e LP |
927 | fail: |
928 | crypt_free(cd); | |
929 | return r; | |
930 | } | |
931 | #endif | |
932 | ||
933 | int dissected_image_decrypt( | |
934 | DissectedImage *m, | |
935 | const char *passphrase, | |
4623e8e6 LP |
936 | const void *root_hash, |
937 | size_t root_hash_size, | |
18b5886e LP |
938 | DissectImageFlags flags, |
939 | DecryptedImage **ret) { | |
940 | ||
941 | _cleanup_(decrypted_image_unrefp) DecryptedImage *d = NULL; | |
942 | #ifdef HAVE_LIBCRYPTSETUP | |
943 | unsigned i; | |
944 | int r; | |
945 | #endif | |
946 | ||
947 | assert(m); | |
4623e8e6 | 948 | assert(root_hash || root_hash_size == 0); |
18b5886e LP |
949 | |
950 | /* Returns: | |
951 | * | |
952 | * = 0 → There was nothing to decrypt | |
953 | * > 0 → Decrypted successfully | |
954 | * -ENOKEY → There's some to decrypt but no key was supplied | |
955 | * -EKEYREJECTED → Passed key was not correct | |
956 | */ | |
957 | ||
4623e8e6 LP |
958 | if (root_hash && root_hash_size < sizeof(sd_id128_t)) |
959 | return -EINVAL; | |
960 | ||
961 | if (!m->encrypted && !m->verity) { | |
18b5886e LP |
962 | *ret = NULL; |
963 | return 0; | |
964 | } | |
965 | ||
966 | #ifdef HAVE_LIBCRYPTSETUP | |
4623e8e6 | 967 | if (m->encrypted && !passphrase) |
18b5886e LP |
968 | return -ENOKEY; |
969 | ||
970 | d = new0(DecryptedImage, 1); | |
971 | if (!d) | |
972 | return -ENOMEM; | |
973 | ||
974 | for (i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) { | |
975 | DissectedPartition *p = m->partitions + i; | |
4623e8e6 | 976 | int k; |
18b5886e LP |
977 | |
978 | if (!p->found) | |
979 | continue; | |
980 | ||
981 | r = decrypt_partition(p, passphrase, flags, d); | |
982 | if (r < 0) | |
983 | return r; | |
984 | ||
4623e8e6 LP |
985 | k = PARTITION_VERITY_OF(i); |
986 | if (k >= 0) { | |
987 | r = verity_partition(p, m->partitions + k, root_hash, root_hash_size, flags, d); | |
988 | if (r < 0) | |
989 | return r; | |
990 | } | |
991 | ||
18b5886e LP |
992 | if (!p->decrypted_fstype && p->decrypted_node) { |
993 | r = probe_filesystem(p->decrypted_node, &p->decrypted_fstype); | |
994 | if (r < 0) | |
995 | return r; | |
996 | } | |
997 | } | |
998 | ||
999 | *ret = d; | |
1000 | d = NULL; | |
1001 | ||
1002 | return 1; | |
1003 | #else | |
1004 | return -EOPNOTSUPP; | |
1005 | #endif | |
1006 | } | |
1007 | ||
1008 | int dissected_image_decrypt_interactively( | |
1009 | DissectedImage *m, | |
1010 | const char *passphrase, | |
4623e8e6 LP |
1011 | const void *root_hash, |
1012 | size_t root_hash_size, | |
18b5886e LP |
1013 | DissectImageFlags flags, |
1014 | DecryptedImage **ret) { | |
1015 | ||
1016 | _cleanup_strv_free_erase_ char **z = NULL; | |
1017 | int n = 3, r; | |
1018 | ||
1019 | if (passphrase) | |
1020 | n--; | |
1021 | ||
1022 | for (;;) { | |
4623e8e6 | 1023 | r = dissected_image_decrypt(m, passphrase, root_hash, root_hash_size, flags, ret); |
18b5886e LP |
1024 | if (r >= 0) |
1025 | return r; | |
1026 | if (r == -EKEYREJECTED) | |
1027 | log_error_errno(r, "Incorrect passphrase, try again!"); | |
1028 | else if (r != -ENOKEY) { | |
1029 | log_error_errno(r, "Failed to decrypt image: %m"); | |
1030 | return r; | |
1031 | } | |
1032 | ||
1033 | if (--n < 0) { | |
1034 | log_error("Too many retries."); | |
1035 | return -EKEYREJECTED; | |
1036 | } | |
1037 | ||
1038 | z = strv_free(z); | |
1039 | ||
1040 | r = ask_password_auto("Please enter image passphrase!", NULL, "dissect", "dissect", USEC_INFINITY, 0, &z); | |
1041 | if (r < 0) | |
1042 | return log_error_errno(r, "Failed to query for passphrase: %m"); | |
1043 | ||
1044 | passphrase = z[0]; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | #ifdef HAVE_LIBCRYPTSETUP | |
1049 | static int deferred_remove(DecryptedPartition *p) { | |
1050 | ||
1051 | struct dm_ioctl dm = { | |
1052 | .version = { | |
1053 | DM_VERSION_MAJOR, | |
1054 | DM_VERSION_MINOR, | |
1055 | DM_VERSION_PATCHLEVEL | |
1056 | }, | |
1057 | .data_size = sizeof(dm), | |
1058 | .flags = DM_DEFERRED_REMOVE, | |
1059 | }; | |
1060 | ||
1061 | _cleanup_close_ int fd = -1; | |
1062 | ||
1063 | assert(p); | |
1064 | ||
1065 | /* Unfortunately, libcryptsetup doesn't provide a proper API for this, hence call the ioctl() directly. */ | |
1066 | ||
1067 | fd = open("/dev/mapper/control", O_RDWR|O_CLOEXEC); | |
1068 | if (fd < 0) | |
1069 | return -errno; | |
1070 | ||
1071 | strncpy(dm.name, p->name, sizeof(dm.name)); | |
1072 | ||
1073 | if (ioctl(fd, DM_DEV_REMOVE, &dm)) | |
1074 | return -errno; | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | #endif | |
1079 | ||
1080 | int decrypted_image_relinquish(DecryptedImage *d) { | |
1081 | ||
1082 | #ifdef HAVE_LIBCRYPTSETUP | |
1083 | size_t i; | |
1084 | int r; | |
1085 | #endif | |
1086 | ||
1087 | assert(d); | |
1088 | ||
1089 | /* Turns on automatic removal after the last use ended for all DM devices of this image, and sets a boolean so | |
1090 | * that we don't clean it up ourselves either anymore */ | |
1091 | ||
1092 | #ifdef HAVE_LIBCRYPTSETUP | |
1093 | for (i = 0; i < d->n_decrypted; i++) { | |
1094 | DecryptedPartition *p = d->decrypted + i; | |
1095 | ||
1096 | if (p->relinquished) | |
1097 | continue; | |
1098 | ||
1099 | r = deferred_remove(p); | |
1100 | if (r < 0) | |
1101 | return log_debug_errno(r, "Failed to mark %s for auto-removal: %m", p->name); | |
1102 | ||
1103 | p->relinquished = true; | |
1104 | } | |
1105 | #endif | |
1106 | ||
1107 | return 0; | |
1108 | } | |
1109 | ||
78ebe980 LP |
1110 | int root_hash_load(const char *image, void **ret, size_t *ret_size) { |
1111 | _cleanup_free_ char *text = NULL; | |
1112 | _cleanup_free_ void *k = NULL; | |
78ebe980 LP |
1113 | size_t l; |
1114 | int r; | |
1115 | ||
1116 | assert(image); | |
1117 | assert(ret); | |
1118 | assert(ret_size); | |
1119 | ||
1120 | if (is_device_path(image)) { | |
1121 | /* If we are asked to load the root hash for a device node, exit early */ | |
1122 | *ret = NULL; | |
1123 | *ret_size = 0; | |
1124 | return 0; | |
1125 | } | |
1126 | ||
41488e1f LP |
1127 | r = getxattr_malloc(image, "user.verity.roothash", &text, true); |
1128 | if (r < 0) { | |
1129 | char *fn, *e, *n; | |
78ebe980 | 1130 | |
41488e1f LP |
1131 | if (!IN_SET(r, -ENODATA, -EOPNOTSUPP, -ENOENT)) |
1132 | return r; | |
78ebe980 | 1133 | |
41488e1f LP |
1134 | fn = newa(char, strlen(image) + strlen(".roothash") + 1); |
1135 | n = stpcpy(fn, image); | |
1136 | e = endswith(fn, ".raw"); | |
1137 | if (e) | |
1138 | n = e; | |
1139 | ||
1140 | strcpy(n, ".roothash"); | |
1141 | ||
1142 | r = read_one_line_file(fn, &text); | |
1143 | if (r == -ENOENT) { | |
1144 | *ret = NULL; | |
1145 | *ret_size = 0; | |
1146 | return 0; | |
1147 | } | |
1148 | if (r < 0) | |
1149 | return r; | |
78ebe980 | 1150 | } |
78ebe980 LP |
1151 | |
1152 | r = unhexmem(text, strlen(text), &k, &l); | |
1153 | if (r < 0) | |
1154 | return r; | |
1155 | if (l < sizeof(sd_id128_t)) | |
1156 | return -EINVAL; | |
1157 | ||
1158 | *ret = k; | |
1159 | *ret_size = l; | |
1160 | ||
1161 | k = NULL; | |
1162 | ||
1163 | return 1; | |
1164 | } | |
1165 | ||
8c1be37e LP |
1166 | static const char *const partition_designator_table[] = { |
1167 | [PARTITION_ROOT] = "root", | |
1168 | [PARTITION_ROOT_SECONDARY] = "root-secondary", | |
1169 | [PARTITION_HOME] = "home", | |
1170 | [PARTITION_SRV] = "srv", | |
1171 | [PARTITION_ESP] = "esp", | |
1172 | [PARTITION_SWAP] = "swap", | |
4623e8e6 LP |
1173 | [PARTITION_ROOT_VERITY] = "root-verity", |
1174 | [PARTITION_ROOT_SECONDARY_VERITY] = "root-secondary-verity", | |
8c1be37e LP |
1175 | }; |
1176 | ||
1177 | DEFINE_STRING_TABLE_LOOKUP(partition_designator, int); |