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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
8c1be37e | 2 | |
10c1b188 LP |
3 | #if HAVE_VALGRIND_MEMCHECK_H |
4 | #include <valgrind/memcheck.h> | |
5 | #endif | |
6 | ||
01234e1f YW |
7 | #include <linux/dm-ioctl.h> |
8 | #include <linux/loop.h> | |
8c1be37e | 9 | #include <sys/mount.h> |
3b925504 LP |
10 | #include <sys/prctl.h> |
11 | #include <sys/wait.h> | |
f5ea63a5 | 12 | #include <sysexits.h> |
8c1be37e | 13 | |
3c1f2cee | 14 | #include "sd-device.h" |
dccca82b LP |
15 | #include "sd-id128.h" |
16 | ||
8c1be37e | 17 | #include "architecture.h" |
18b5886e | 18 | #include "ask-password-api.h" |
8c1be37e | 19 | #include "blkid-util.h" |
18c528e9 | 20 | #include "blockdev-util.h" |
3b925504 | 21 | #include "copy.h" |
1e2f3230 | 22 | #include "cryptsetup-util.h" |
3b925504 | 23 | #include "def.h" |
553e15f2 | 24 | #include "device-nodes.h" |
8437c059 | 25 | #include "device-util.h" |
8c1be37e | 26 | #include "dissect-image.h" |
a709a315 | 27 | #include "dm-util.h" |
686d13b9 | 28 | #include "env-file.h" |
18b5886e | 29 | #include "fd-util.h" |
78ebe980 | 30 | #include "fileio.h" |
2eedfd2d | 31 | #include "fs-util.h" |
cf32c486 | 32 | #include "fsck-util.h" |
8c1be37e | 33 | #include "gpt.h" |
78ebe980 | 34 | #include "hexdecoct.h" |
3b925504 LP |
35 | #include "hostname-util.h" |
36 | #include "id128-util.h" | |
6aa05ebd | 37 | #include "mkdir.h" |
8c1be37e | 38 | #include "mount-util.h" |
e4de7287 | 39 | #include "mountpoint-util.h" |
6aa05ebd | 40 | #include "namespace-util.h" |
d8b4d14d | 41 | #include "nulstr-util.h" |
d58ad743 | 42 | #include "os-util.h" |
8c1be37e | 43 | #include "path-util.h" |
3b925504 LP |
44 | #include "process-util.h" |
45 | #include "raw-clone.h" | |
46 | #include "signal-util.h" | |
8c1be37e | 47 | #include "stat-util.h" |
18b5886e | 48 | #include "stdio-util.h" |
8c1be37e LP |
49 | #include "string-table.h" |
50 | #include "string-util.h" | |
2eedfd2d | 51 | #include "strv.h" |
e4de7287 | 52 | #include "tmpfile-util.h" |
a8040b6d | 53 | #include "udev-util.h" |
2d3a5a73 | 54 | #include "user-util.h" |
41488e1f | 55 | #include "xattr-util.h" |
8c1be37e | 56 | |
28e2641a FF |
57 | /* how many times to wait for the device nodes to appear */ |
58 | #define N_DEVICE_NODE_LIST_ATTEMPTS 10 | |
59 | ||
c34b75a1 | 60 | int probe_filesystem(const char *node, char **ret_fstype) { |
7cc84b2c | 61 | /* Try to find device content type and return it in *ret_fstype. If nothing is found, |
5238e957 | 62 | * 0/NULL will be returned. -EUCLEAN will be returned for ambiguous results, and an |
7cc84b2c ZJS |
63 | * different error otherwise. */ |
64 | ||
349cc4a5 | 65 | #if HAVE_BLKID |
8e766630 | 66 | _cleanup_(blkid_free_probep) blkid_probe b = NULL; |
18b5886e LP |
67 | const char *fstype; |
68 | int r; | |
69 | ||
995fa2e5 | 70 | errno = 0; |
18b5886e LP |
71 | b = blkid_new_probe_from_filename(node); |
72 | if (!b) | |
66855de7 | 73 | return errno_or_else(ENOMEM); |
18b5886e LP |
74 | |
75 | blkid_probe_enable_superblocks(b, 1); | |
76 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE); | |
77 | ||
78 | errno = 0; | |
79 | r = blkid_do_safeprobe(b); | |
7cc84b2c ZJS |
80 | if (r == 1) { |
81 | log_debug("No type detected on partition %s", node); | |
18b5886e LP |
82 | goto not_found; |
83 | } | |
58dfbfbd LP |
84 | if (r == -2) |
85 | return log_debug_errno(SYNTHETIC_ERRNO(EUCLEAN), | |
86 | "Results ambiguous for partition %s", node); | |
b382db9f | 87 | if (r != 0) |
66855de7 | 88 | return errno_or_else(EIO); |
18b5886e LP |
89 | |
90 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
91 | ||
92 | if (fstype) { | |
93 | char *t; | |
94 | ||
95 | t = strdup(fstype); | |
96 | if (!t) | |
97 | return -ENOMEM; | |
98 | ||
99 | *ret_fstype = t; | |
100 | return 1; | |
101 | } | |
102 | ||
103 | not_found: | |
104 | *ret_fstype = NULL; | |
105 | return 0; | |
d1c536f5 ZJS |
106 | #else |
107 | return -EOPNOTSUPP; | |
a75e27eb | 108 | #endif |
d1c536f5 | 109 | } |
18b5886e | 110 | |
40c10d3f | 111 | #if HAVE_BLKID |
cde942f6 JPRV |
112 | /* Detect RPMB and Boot partitions, which are not listed by blkid. |
113 | * See https://github.com/systemd/systemd/issues/5806. */ | |
3c1f2cee | 114 | static bool device_is_mmc_special_partition(sd_device *d) { |
aae22eb3 LP |
115 | const char *sysname; |
116 | ||
f70e7f70 LP |
117 | assert(d); |
118 | ||
3c1f2cee YW |
119 | if (sd_device_get_sysname(d, &sysname) < 0) |
120 | return false; | |
121 | ||
122 | return startswith(sysname, "mmcblk") && | |
0cfa78dd | 123 | (endswith(sysname, "rpmb") || endswith(sysname, "boot0") || endswith(sysname, "boot1")); |
cde942f6 JPRV |
124 | } |
125 | ||
3c1f2cee | 126 | static bool device_is_block(sd_device *d) { |
aae22eb3 LP |
127 | const char *ss; |
128 | ||
f70e7f70 LP |
129 | assert(d); |
130 | ||
3c1f2cee | 131 | if (sd_device_get_subsystem(d, &ss) < 0) |
aae22eb3 LP |
132 | return false; |
133 | ||
134 | return streq(ss, "block"); | |
135 | } | |
ea887be0 ZJS |
136 | |
137 | static int enumerator_for_parent(sd_device *d, sd_device_enumerator **ret) { | |
138 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
139 | int r; | |
140 | ||
f70e7f70 LP |
141 | assert(d); |
142 | assert(ret); | |
143 | ||
ea887be0 ZJS |
144 | r = sd_device_enumerator_new(&e); |
145 | if (r < 0) | |
146 | return r; | |
147 | ||
148 | r = sd_device_enumerator_allow_uninitialized(e); | |
149 | if (r < 0) | |
150 | return r; | |
151 | ||
152 | r = sd_device_enumerator_add_match_parent(e, d); | |
153 | if (r < 0) | |
154 | return r; | |
155 | ||
156 | *ret = TAKE_PTR(e); | |
157 | return 0; | |
158 | } | |
159 | ||
ea887be0 ZJS |
160 | static int wait_for_partitions_to_appear( |
161 | int fd, | |
162 | sd_device *d, | |
163 | unsigned num_partitions, | |
052eaf5c | 164 | DissectImageFlags flags, |
ea887be0 ZJS |
165 | sd_device_enumerator **ret_enumerator) { |
166 | ||
167 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
168 | sd_device *q; | |
169 | unsigned n; | |
170 | int r; | |
171 | ||
f70e7f70 LP |
172 | assert(fd >= 0); |
173 | assert(d); | |
174 | assert(ret_enumerator); | |
175 | ||
ea887be0 ZJS |
176 | r = enumerator_for_parent(d, &e); |
177 | if (r < 0) | |
178 | return r; | |
179 | ||
180 | /* Count the partitions enumerated by the kernel */ | |
181 | n = 0; | |
182 | FOREACH_DEVICE(e, q) { | |
183 | if (sd_device_get_devnum(q, NULL) < 0) | |
184 | continue; | |
185 | if (!device_is_block(q)) | |
186 | continue; | |
187 | if (device_is_mmc_special_partition(q)) | |
188 | continue; | |
189 | ||
052eaf5c | 190 | if (!FLAGS_SET(flags, DISSECT_IMAGE_NO_UDEV)) { |
1b47436e | 191 | r = device_wait_for_initialization(q, "block", USEC_INFINITY, NULL); |
052eaf5c LP |
192 | if (r < 0) |
193 | return r; | |
194 | } | |
a8040b6d | 195 | |
ea887be0 ZJS |
196 | n++; |
197 | } | |
198 | ||
199 | if (n == num_partitions + 1) { | |
200 | *ret_enumerator = TAKE_PTR(e); | |
201 | return 0; /* success! */ | |
202 | } | |
203 | if (n > num_partitions + 1) | |
204 | return log_debug_errno(SYNTHETIC_ERRNO(EIO), | |
205 | "blkid and kernel partition lists do not match."); | |
206 | ||
207 | /* The kernel has probed fewer partitions than blkid? Maybe the kernel prober is still running or it | |
208 | * got EBUSY because udev already opened the device. Let's reprobe the device, which is a synchronous | |
209 | * call that waits until probing is complete. */ | |
210 | ||
211 | for (unsigned j = 0; ; j++) { | |
212 | if (j++ > 20) | |
213 | return -EBUSY; | |
214 | ||
215 | if (ioctl(fd, BLKRRPART, 0) >= 0) | |
216 | break; | |
217 | r = -errno; | |
218 | if (r == -EINVAL) { | |
834c15ec LP |
219 | /* If we are running on a block device that has partition scanning off, return an |
220 | * explicit recognizable error about this, so that callers can generate a proper | |
221 | * message explaining the situation. */ | |
ea887be0 | 222 | |
834c15ec LP |
223 | r = blockdev_partscan_enabled(fd); |
224 | if (r < 0) | |
225 | return r; | |
226 | if (r == 0) | |
227 | return log_debug_errno(EPROTONOSUPPORT, | |
228 | "Device is a loop device and partition scanning is off!"); | |
10c1b188 | 229 | |
834c15ec | 230 | return -EINVAL; /* original error */ |
ea887be0 ZJS |
231 | } |
232 | if (r != -EBUSY) | |
233 | return r; | |
234 | ||
235 | /* If something else has the device open, such as an udev rule, the ioctl will return | |
236 | * EBUSY. Since there's no way to wait until it isn't busy anymore, let's just wait a bit, | |
237 | * and try again. | |
238 | * | |
239 | * This is really something they should fix in the kernel! */ | |
240 | (void) usleep(50 * USEC_PER_MSEC); | |
241 | ||
242 | } | |
243 | ||
244 | return -EAGAIN; /* no success yet, try again */ | |
245 | } | |
246 | ||
247 | static int loop_wait_for_partitions_to_appear( | |
248 | int fd, | |
249 | sd_device *d, | |
250 | unsigned num_partitions, | |
052eaf5c | 251 | DissectImageFlags flags, |
ea887be0 | 252 | sd_device_enumerator **ret_enumerator) { |
a8040b6d | 253 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
ea887be0 ZJS |
254 | int r; |
255 | ||
f70e7f70 LP |
256 | assert(fd >= 0); |
257 | assert(d); | |
258 | assert(ret_enumerator); | |
259 | ||
b887c8b8 ZJS |
260 | log_debug("Waiting for device (parent + %d partitions) to appear...", num_partitions); |
261 | ||
052eaf5c | 262 | if (!FLAGS_SET(flags, DISSECT_IMAGE_NO_UDEV)) { |
1b47436e | 263 | r = device_wait_for_initialization(d, "block", USEC_INFINITY, &device); |
052eaf5c LP |
264 | if (r < 0) |
265 | return r; | |
266 | } else | |
267 | device = sd_device_ref(d); | |
a8040b6d | 268 | |
ea887be0 | 269 | for (unsigned i = 0; i < N_DEVICE_NODE_LIST_ATTEMPTS; i++) { |
052eaf5c | 270 | r = wait_for_partitions_to_appear(fd, device, num_partitions, flags, ret_enumerator); |
ea887be0 ZJS |
271 | if (r != -EAGAIN) |
272 | return r; | |
273 | } | |
274 | ||
275 | return log_debug_errno(SYNTHETIC_ERRNO(ENXIO), | |
276 | "Kernel partitions dit not appear within %d attempts", | |
277 | N_DEVICE_NODE_LIST_ATTEMPTS); | |
278 | } | |
279 | ||
0f7c9a3d LP |
280 | static void check_partition_flags( |
281 | const char *node, | |
282 | unsigned long long pflags, | |
283 | unsigned long long supported) { | |
284 | ||
285 | assert(node); | |
286 | ||
287 | /* Mask away all flags supported by this partition's type and the three flags the UEFI spec defines generically */ | |
288 | pflags &= ~(supported | GPT_FLAG_REQUIRED_PARTITION | GPT_FLAG_NO_BLOCK_IO_PROTOCOL | GPT_FLAG_LEGACY_BIOS_BOOTABLE); | |
289 | ||
290 | if (pflags == 0) | |
291 | return; | |
292 | ||
293 | /* If there are other bits set, then log about it, to make things discoverable */ | |
294 | for (unsigned i = 0; i < sizeof(pflags) * 8; i++) { | |
295 | unsigned long long bit = 1ULL << i; | |
296 | if (!FLAGS_SET(pflags, bit)) | |
297 | continue; | |
298 | ||
299 | log_debug("Unexpected partition flag %llu set on %s!", bit, node); | |
300 | } | |
301 | } | |
302 | ||
40c10d3f | 303 | #endif |
aae22eb3 | 304 | |
4526113f LP |
305 | int dissect_image( |
306 | int fd, | |
89e62e0b | 307 | const VeritySettings *verity, |
18d73705 | 308 | const MountOptions *mount_options, |
4526113f LP |
309 | DissectImageFlags flags, |
310 | DissectedImage **ret) { | |
8c1be37e | 311 | |
349cc4a5 | 312 | #if HAVE_BLKID |
4623e8e6 | 313 | sd_id128_t root_uuid = SD_ID128_NULL, verity_uuid = SD_ID128_NULL; |
3c1f2cee | 314 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; |
8c1be37e | 315 | bool is_gpt, is_mbr, generic_rw, multiple_generic = false; |
3c1f2cee | 316 | _cleanup_(sd_device_unrefp) sd_device *d = NULL; |
8c1be37e | 317 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; |
8e766630 | 318 | _cleanup_(blkid_free_probep) blkid_probe b = NULL; |
8c1be37e | 319 | _cleanup_free_ char *generic_node = NULL; |
be30ad41 | 320 | sd_id128_t generic_uuid = SD_ID128_NULL; |
9b6deb03 | 321 | const char *pttype = NULL; |
8c1be37e LP |
322 | blkid_partlist pl; |
323 | int r, generic_nr; | |
324 | struct stat st; | |
3c1f2cee | 325 | sd_device *q; |
8c1be37e LP |
326 | |
327 | assert(fd >= 0); | |
328 | assert(ret); | |
89e62e0b | 329 | assert(!verity || verity->root_hash || verity->root_hash_size == 0); |
e7cbe5cb | 330 | assert(!((flags & DISSECT_IMAGE_GPT_ONLY) && (flags & DISSECT_IMAGE_NO_PARTITION_TABLE))); |
8c1be37e LP |
331 | |
332 | /* Probes a disk image, and returns information about what it found in *ret. | |
333 | * | |
4623e8e6 LP |
334 | * Returns -ENOPKG if no suitable partition table or file system could be found. |
335 | * Returns -EADDRNOTAVAIL if a root hash was specified but no matching root/verity partitions found. */ | |
336 | ||
89e62e0b | 337 | if (verity && verity->root_hash) { |
4623e8e6 LP |
338 | /* If a root hash is supplied, then we use the root partition that has a UUID that match the first |
339 | * 128bit of the root hash. And we use the verity partition that has a UUID that match the final | |
340 | * 128bit. */ | |
341 | ||
89e62e0b | 342 | if (verity->root_hash_size < sizeof(sd_id128_t)) |
4623e8e6 LP |
343 | return -EINVAL; |
344 | ||
89e62e0b LP |
345 | memcpy(&root_uuid, verity->root_hash, sizeof(sd_id128_t)); |
346 | memcpy(&verity_uuid, (const uint8_t*) verity->root_hash + verity->root_hash_size - sizeof(sd_id128_t), sizeof(sd_id128_t)); | |
4623e8e6 LP |
347 | |
348 | if (sd_id128_is_null(root_uuid)) | |
349 | return -EINVAL; | |
350 | if (sd_id128_is_null(verity_uuid)) | |
351 | return -EINVAL; | |
352 | } | |
8c1be37e LP |
353 | |
354 | if (fstat(fd, &st) < 0) | |
355 | return -errno; | |
356 | ||
357 | if (!S_ISBLK(st.st_mode)) | |
358 | return -ENOTBLK; | |
359 | ||
360 | b = blkid_new_probe(); | |
361 | if (!b) | |
362 | return -ENOMEM; | |
363 | ||
364 | errno = 0; | |
365 | r = blkid_probe_set_device(b, fd, 0, 0); | |
b382db9f | 366 | if (r != 0) |
66855de7 | 367 | return errno_or_else(ENOMEM); |
8c1be37e | 368 | |
9b6deb03 LP |
369 | if ((flags & DISSECT_IMAGE_GPT_ONLY) == 0) { |
370 | /* Look for file system superblocks, unless we only shall look for GPT partition tables */ | |
371 | blkid_probe_enable_superblocks(b, 1); | |
372 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE|BLKID_SUBLKS_USAGE); | |
373 | } | |
374 | ||
8c1be37e LP |
375 | blkid_probe_enable_partitions(b, 1); |
376 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
377 | ||
378 | errno = 0; | |
379 | r = blkid_do_safeprobe(b); | |
59ba6d0c LP |
380 | if (IN_SET(r, -2, 1)) |
381 | return log_debug_errno(SYNTHETIC_ERRNO(ENOPKG), "Failed to identify any partition table."); | |
b382db9f | 382 | if (r != 0) |
66855de7 | 383 | return errno_or_else(EIO); |
8c1be37e LP |
384 | |
385 | m = new0(DissectedImage, 1); | |
386 | if (!m) | |
387 | return -ENOMEM; | |
388 | ||
b887c8b8 ZJS |
389 | r = sd_device_new_from_devnum(&d, 'b', st.st_rdev); |
390 | if (r < 0) | |
391 | return r; | |
392 | ||
e7cbe5cb LB |
393 | if ((!(flags & DISSECT_IMAGE_GPT_ONLY) && |
394 | (flags & DISSECT_IMAGE_REQUIRE_ROOT)) || | |
395 | (flags & DISSECT_IMAGE_NO_PARTITION_TABLE)) { | |
9b6deb03 | 396 | const char *usage = NULL; |
8c1be37e | 397 | |
9b6deb03 LP |
398 | (void) blkid_probe_lookup_value(b, "USAGE", &usage, NULL); |
399 | if (STRPTR_IN_SET(usage, "filesystem", "crypto")) { | |
18d73705 LB |
400 | _cleanup_free_ char *t = NULL, *n = NULL, *o = NULL; |
401 | const char *fstype = NULL, *options = NULL; | |
8c1be37e | 402 | |
9b6deb03 LP |
403 | /* OK, we have found a file system, that's our root partition then. */ |
404 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
8c1be37e | 405 | |
9b6deb03 LP |
406 | if (fstype) { |
407 | t = strdup(fstype); | |
408 | if (!t) | |
409 | return -ENOMEM; | |
410 | } | |
411 | ||
54b22b26 LP |
412 | r = device_path_make_major_minor(st.st_mode, st.st_rdev, &n); |
413 | if (r < 0) | |
414 | return r; | |
8c1be37e | 415 | |
e7cbe5cb | 416 | m->single_file_system = true; |
89e62e0b LP |
417 | m->verity = verity && verity->root_hash && verity->data_path; |
418 | m->can_verity = verity && verity->data_path; | |
e7cbe5cb | 419 | |
f5215bc8 | 420 | options = mount_options_from_designator(mount_options, PARTITION_ROOT); |
18d73705 LB |
421 | if (options) { |
422 | o = strdup(options); | |
423 | if (!o) | |
424 | return -ENOMEM; | |
425 | } | |
426 | ||
9b6deb03 LP |
427 | m->partitions[PARTITION_ROOT] = (DissectedPartition) { |
428 | .found = true, | |
e7cbe5cb | 429 | .rw = !m->verity, |
9b6deb03 LP |
430 | .partno = -1, |
431 | .architecture = _ARCHITECTURE_INVALID, | |
1cc6c93a YW |
432 | .fstype = TAKE_PTR(t), |
433 | .node = TAKE_PTR(n), | |
18d73705 | 434 | .mount_options = TAKE_PTR(o), |
9b6deb03 | 435 | }; |
8c1be37e | 436 | |
4db1879a | 437 | m->encrypted = streq_ptr(fstype, "crypto_LUKS"); |
18b5886e | 438 | |
b1806441 LB |
439 | /* Even on a single partition we need to wait for udev to create the |
440 | * /dev/block/X:Y symlink to /dev/loopZ */ | |
441 | r = loop_wait_for_partitions_to_appear(fd, d, 0, flags, &e); | |
442 | if (r < 0) | |
443 | return r; | |
1cc6c93a | 444 | *ret = TAKE_PTR(m); |
8c1be37e | 445 | |
9b6deb03 LP |
446 | return 0; |
447 | } | |
8c1be37e LP |
448 | } |
449 | ||
450 | (void) blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL); | |
451 | if (!pttype) | |
452 | return -ENOPKG; | |
453 | ||
454 | is_gpt = streq_ptr(pttype, "gpt"); | |
455 | is_mbr = streq_ptr(pttype, "dos"); | |
456 | ||
9b6deb03 | 457 | if (!is_gpt && ((flags & DISSECT_IMAGE_GPT_ONLY) || !is_mbr)) |
8c1be37e LP |
458 | return -ENOPKG; |
459 | ||
460 | errno = 0; | |
461 | pl = blkid_probe_get_partitions(b); | |
b382db9f | 462 | if (!pl) |
66855de7 | 463 | return errno_or_else(ENOMEM); |
8c1be37e | 464 | |
052eaf5c | 465 | r = loop_wait_for_partitions_to_appear(fd, d, blkid_partlist_numof_partitions(pl), flags, &e); |
ea887be0 ZJS |
466 | if (r < 0) |
467 | return r; | |
8c1be37e | 468 | |
8437c059 | 469 | FOREACH_DEVICE(e, q) { |
9b6deb03 | 470 | unsigned long long pflags; |
8c1be37e | 471 | blkid_partition pp; |
cde942f6 | 472 | const char *node; |
8c1be37e LP |
473 | dev_t qn; |
474 | int nr; | |
475 | ||
3c1f2cee YW |
476 | r = sd_device_get_devnum(q, &qn); |
477 | if (r < 0) | |
8c1be37e LP |
478 | continue; |
479 | ||
480 | if (st.st_rdev == qn) | |
481 | continue; | |
482 | ||
aae22eb3 LP |
483 | if (!device_is_block(q)) |
484 | continue; | |
485 | ||
cde942f6 | 486 | if (device_is_mmc_special_partition(q)) |
7be1420f LP |
487 | continue; |
488 | ||
3c1f2cee YW |
489 | r = sd_device_get_devname(q, &node); |
490 | if (r < 0) | |
8c1be37e LP |
491 | continue; |
492 | ||
493 | pp = blkid_partlist_devno_to_partition(pl, qn); | |
494 | if (!pp) | |
495 | continue; | |
496 | ||
9b6deb03 | 497 | pflags = blkid_partition_get_flags(pp); |
8c1be37e LP |
498 | |
499 | nr = blkid_partition_get_partno(pp); | |
500 | if (nr < 0) | |
501 | continue; | |
502 | ||
503 | if (is_gpt) { | |
569a0e42 LP |
504 | PartitionDesignator designator = _PARTITION_DESIGNATOR_INVALID; |
505 | int architecture = _ARCHITECTURE_INVALID; | |
4623e8e6 LP |
506 | const char *stype, *sid, *fstype = NULL; |
507 | sd_id128_t type_id, id; | |
8c1be37e LP |
508 | bool rw = true; |
509 | ||
4623e8e6 LP |
510 | sid = blkid_partition_get_uuid(pp); |
511 | if (!sid) | |
512 | continue; | |
513 | if (sd_id128_from_string(sid, &id) < 0) | |
514 | continue; | |
515 | ||
8c1be37e LP |
516 | stype = blkid_partition_get_type_string(pp); |
517 | if (!stype) | |
518 | continue; | |
8c1be37e LP |
519 | if (sd_id128_from_string(stype, &type_id) < 0) |
520 | continue; | |
521 | ||
522 | if (sd_id128_equal(type_id, GPT_HOME)) { | |
a48dd347 | 523 | |
0f7c9a3d LP |
524 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
525 | ||
a48dd347 LP |
526 | if (pflags & GPT_FLAG_NO_AUTO) |
527 | continue; | |
528 | ||
8c1be37e | 529 | designator = PARTITION_HOME; |
9b6deb03 | 530 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
8c1be37e | 531 | } else if (sd_id128_equal(type_id, GPT_SRV)) { |
a48dd347 | 532 | |
0f7c9a3d LP |
533 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
534 | ||
a48dd347 LP |
535 | if (pflags & GPT_FLAG_NO_AUTO) |
536 | continue; | |
537 | ||
8c1be37e | 538 | designator = PARTITION_SRV; |
9b6deb03 | 539 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
8c1be37e | 540 | } else if (sd_id128_equal(type_id, GPT_ESP)) { |
a48dd347 LP |
541 | |
542 | /* Note that we don't check the GPT_FLAG_NO_AUTO flag for the ESP, as it is not defined | |
543 | * there. We instead check the GPT_FLAG_NO_BLOCK_IO_PROTOCOL, as recommended by the | |
544 | * UEFI spec (See "12.3.3 Number and Location of System Partitions"). */ | |
545 | ||
546 | if (pflags & GPT_FLAG_NO_BLOCK_IO_PROTOCOL) | |
547 | continue; | |
548 | ||
8c1be37e LP |
549 | designator = PARTITION_ESP; |
550 | fstype = "vfat"; | |
a8c47660 LP |
551 | |
552 | } else if (sd_id128_equal(type_id, GPT_XBOOTLDR)) { | |
553 | ||
0f7c9a3d LP |
554 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
555 | ||
a8c47660 LP |
556 | if (pflags & GPT_FLAG_NO_AUTO) |
557 | continue; | |
558 | ||
559 | designator = PARTITION_XBOOTLDR; | |
560 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
8c1be37e LP |
561 | } |
562 | #ifdef GPT_ROOT_NATIVE | |
563 | else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE)) { | |
4623e8e6 | 564 | |
0f7c9a3d LP |
565 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
566 | ||
a48dd347 LP |
567 | if (pflags & GPT_FLAG_NO_AUTO) |
568 | continue; | |
569 | ||
4623e8e6 LP |
570 | /* If a root ID is specified, ignore everything but the root id */ |
571 | if (!sd_id128_is_null(root_uuid) && !sd_id128_equal(root_uuid, id)) | |
572 | continue; | |
573 | ||
8c1be37e LP |
574 | designator = PARTITION_ROOT; |
575 | architecture = native_architecture(); | |
9b6deb03 | 576 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
4f8b86e3 | 577 | } else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE_VERITY)) { |
4623e8e6 | 578 | |
0f7c9a3d LP |
579 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
580 | ||
a48dd347 LP |
581 | if (pflags & GPT_FLAG_NO_AUTO) |
582 | continue; | |
583 | ||
4623e8e6 LP |
584 | m->can_verity = true; |
585 | ||
586 | /* Ignore verity unless a root hash is specified */ | |
587 | if (sd_id128_is_null(verity_uuid) || !sd_id128_equal(verity_uuid, id)) | |
588 | continue; | |
589 | ||
590 | designator = PARTITION_ROOT_VERITY; | |
591 | fstype = "DM_verity_hash"; | |
592 | architecture = native_architecture(); | |
593 | rw = false; | |
594 | } | |
595 | #endif | |
8c1be37e LP |
596 | #ifdef GPT_ROOT_SECONDARY |
597 | else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY)) { | |
4623e8e6 | 598 | |
0f7c9a3d LP |
599 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
600 | ||
a48dd347 LP |
601 | if (pflags & GPT_FLAG_NO_AUTO) |
602 | continue; | |
603 | ||
4623e8e6 LP |
604 | /* If a root ID is specified, ignore everything but the root id */ |
605 | if (!sd_id128_is_null(root_uuid) && !sd_id128_equal(root_uuid, id)) | |
606 | continue; | |
607 | ||
8c1be37e LP |
608 | designator = PARTITION_ROOT_SECONDARY; |
609 | architecture = SECONDARY_ARCHITECTURE; | |
9b6deb03 | 610 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
4f8b86e3 | 611 | } else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY_VERITY)) { |
a48dd347 | 612 | |
0f7c9a3d LP |
613 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
614 | ||
a48dd347 LP |
615 | if (pflags & GPT_FLAG_NO_AUTO) |
616 | continue; | |
617 | ||
4623e8e6 LP |
618 | m->can_verity = true; |
619 | ||
620 | /* Ignore verity unless root has is specified */ | |
621 | if (sd_id128_is_null(verity_uuid) || !sd_id128_equal(verity_uuid, id)) | |
622 | continue; | |
623 | ||
624 | designator = PARTITION_ROOT_SECONDARY_VERITY; | |
625 | fstype = "DM_verity_hash"; | |
626 | architecture = SECONDARY_ARCHITECTURE; | |
627 | rw = false; | |
628 | } | |
8c1be37e LP |
629 | #endif |
630 | else if (sd_id128_equal(type_id, GPT_SWAP)) { | |
a48dd347 | 631 | |
0f7c9a3d LP |
632 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO); |
633 | ||
a48dd347 LP |
634 | if (pflags & GPT_FLAG_NO_AUTO) |
635 | continue; | |
636 | ||
8c1be37e LP |
637 | designator = PARTITION_SWAP; |
638 | fstype = "swap"; | |
639 | } else if (sd_id128_equal(type_id, GPT_LINUX_GENERIC)) { | |
640 | ||
0f7c9a3d LP |
641 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
642 | ||
a48dd347 LP |
643 | if (pflags & GPT_FLAG_NO_AUTO) |
644 | continue; | |
645 | ||
8c1be37e LP |
646 | if (generic_node) |
647 | multiple_generic = true; | |
648 | else { | |
649 | generic_nr = nr; | |
9b6deb03 | 650 | generic_rw = !(pflags & GPT_FLAG_READ_ONLY); |
be30ad41 | 651 | generic_uuid = id; |
8c1be37e LP |
652 | generic_node = strdup(node); |
653 | if (!generic_node) | |
654 | return -ENOMEM; | |
655 | } | |
d4dffb85 LP |
656 | |
657 | } else if (sd_id128_equal(type_id, GPT_TMP)) { | |
658 | ||
0f7c9a3d LP |
659 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
660 | ||
d4dffb85 LP |
661 | if (pflags & GPT_FLAG_NO_AUTO) |
662 | continue; | |
663 | ||
664 | designator = PARTITION_TMP; | |
665 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
666 | ||
667 | } else if (sd_id128_equal(type_id, GPT_VAR)) { | |
668 | ||
0f7c9a3d LP |
669 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
670 | ||
d4dffb85 LP |
671 | if (pflags & GPT_FLAG_NO_AUTO) |
672 | continue; | |
673 | ||
674 | if (!FLAGS_SET(flags, DISSECT_IMAGE_RELAX_VAR_CHECK)) { | |
675 | sd_id128_t var_uuid; | |
676 | ||
677 | /* For /var we insist that the uuid of the partition matches the | |
678 | * HMAC-SHA256 of the /var GPT partition type uuid, keyed by machine | |
679 | * ID. Why? Unlike the other partitions /var is inherently | |
680 | * installation specific, hence we need to be careful not to mount it | |
681 | * in the wrong installation. By hashing the partition UUID from | |
682 | * /etc/machine-id we can securely bind the partition to the | |
683 | * installation. */ | |
684 | ||
685 | r = sd_id128_get_machine_app_specific(GPT_VAR, &var_uuid); | |
686 | if (r < 0) | |
687 | return r; | |
688 | ||
689 | if (!sd_id128_equal(var_uuid, id)) { | |
690 | log_debug("Found a /var/ partition, but its UUID didn't match our expectations, ignoring."); | |
691 | continue; | |
692 | } | |
693 | } | |
694 | ||
695 | designator = PARTITION_VAR; | |
696 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
8c1be37e LP |
697 | } |
698 | ||
699 | if (designator != _PARTITION_DESIGNATOR_INVALID) { | |
18d73705 LB |
700 | _cleanup_free_ char *t = NULL, *n = NULL, *o = NULL; |
701 | const char *options = NULL; | |
8c1be37e LP |
702 | |
703 | /* First one wins */ | |
704 | if (m->partitions[designator].found) | |
705 | continue; | |
706 | ||
707 | if (fstype) { | |
708 | t = strdup(fstype); | |
709 | if (!t) | |
710 | return -ENOMEM; | |
711 | } | |
712 | ||
713 | n = strdup(node); | |
714 | if (!n) | |
715 | return -ENOMEM; | |
716 | ||
f5215bc8 | 717 | options = mount_options_from_designator(mount_options, designator); |
18d73705 LB |
718 | if (options) { |
719 | o = strdup(options); | |
720 | if (!o) | |
721 | return -ENOMEM; | |
722 | } | |
723 | ||
8c1be37e LP |
724 | m->partitions[designator] = (DissectedPartition) { |
725 | .found = true, | |
726 | .partno = nr, | |
727 | .rw = rw, | |
728 | .architecture = architecture, | |
1cc6c93a YW |
729 | .node = TAKE_PTR(n), |
730 | .fstype = TAKE_PTR(t), | |
be30ad41 | 731 | .uuid = id, |
18d73705 | 732 | .mount_options = TAKE_PTR(o), |
8c1be37e | 733 | }; |
8c1be37e LP |
734 | } |
735 | ||
736 | } else if (is_mbr) { | |
737 | ||
a8c47660 | 738 | switch (blkid_partition_get_type(pp)) { |
8c1be37e | 739 | |
a8c47660 LP |
740 | case 0x83: /* Linux partition */ |
741 | ||
742 | if (pflags != 0x80) /* Bootable flag */ | |
743 | continue; | |
8c1be37e | 744 | |
a8c47660 LP |
745 | if (generic_node) |
746 | multiple_generic = true; | |
747 | else { | |
748 | generic_nr = nr; | |
749 | generic_rw = true; | |
750 | generic_node = strdup(node); | |
751 | if (!generic_node) | |
752 | return -ENOMEM; | |
753 | } | |
754 | ||
755 | break; | |
756 | ||
757 | case 0xEA: { /* Boot Loader Spec extended $BOOT partition */ | |
18d73705 | 758 | _cleanup_free_ char *n = NULL, *o = NULL; |
a8c47660 | 759 | sd_id128_t id = SD_ID128_NULL; |
18d73705 | 760 | const char *sid, *options = NULL; |
a8c47660 LP |
761 | |
762 | /* First one wins */ | |
763 | if (m->partitions[PARTITION_XBOOTLDR].found) | |
764 | continue; | |
765 | ||
766 | sid = blkid_partition_get_uuid(pp); | |
767 | if (sid) | |
768 | (void) sd_id128_from_string(sid, &id); | |
769 | ||
770 | n = strdup(node); | |
771 | if (!n) | |
8c1be37e | 772 | return -ENOMEM; |
a8c47660 | 773 | |
f5215bc8 | 774 | options = mount_options_from_designator(mount_options, PARTITION_XBOOTLDR); |
18d73705 LB |
775 | if (options) { |
776 | o = strdup(options); | |
777 | if (!o) | |
778 | return -ENOMEM; | |
779 | } | |
780 | ||
a8c47660 LP |
781 | m->partitions[PARTITION_XBOOTLDR] = (DissectedPartition) { |
782 | .found = true, | |
783 | .partno = nr, | |
784 | .rw = true, | |
785 | .architecture = _ARCHITECTURE_INVALID, | |
786 | .node = TAKE_PTR(n), | |
787 | .uuid = id, | |
18d73705 | 788 | .mount_options = TAKE_PTR(o), |
a8c47660 LP |
789 | }; |
790 | ||
791 | break; | |
792 | }} | |
8c1be37e LP |
793 | } |
794 | } | |
795 | ||
74cb2db9 LP |
796 | if (m->partitions[PARTITION_ROOT].found) { |
797 | /* If we found the primary arch, then invalidate the secondary arch to avoid any ambiguities, | |
798 | * since we never want to mount the secondary arch in this case. */ | |
799 | m->partitions[PARTITION_ROOT_SECONDARY].found = false; | |
800 | m->partitions[PARTITION_ROOT_SECONDARY_VERITY].found = false; | |
801 | } else { | |
8c1be37e LP |
802 | /* No root partition found? Then let's see if ther's one for the secondary architecture. And if not |
803 | * either, then check if there's a single generic one, and use that. */ | |
804 | ||
4623e8e6 | 805 | if (m->partitions[PARTITION_ROOT_VERITY].found) |
e0f9e7bd | 806 | return -EADDRNOTAVAIL; |
4623e8e6 | 807 | |
8c1be37e LP |
808 | if (m->partitions[PARTITION_ROOT_SECONDARY].found) { |
809 | m->partitions[PARTITION_ROOT] = m->partitions[PARTITION_ROOT_SECONDARY]; | |
810 | zero(m->partitions[PARTITION_ROOT_SECONDARY]); | |
4623e8e6 LP |
811 | |
812 | m->partitions[PARTITION_ROOT_VERITY] = m->partitions[PARTITION_ROOT_SECONDARY_VERITY]; | |
813 | zero(m->partitions[PARTITION_ROOT_SECONDARY_VERITY]); | |
814 | ||
e0f9e7bd | 815 | } else if (flags & DISSECT_IMAGE_REQUIRE_ROOT) { |
18d73705 LB |
816 | _cleanup_free_ char *o = NULL; |
817 | const char *options = NULL; | |
e0f9e7bd | 818 | |
2aed63f4 ZJS |
819 | /* If the root hash was set, then we won't fall back to a generic node, because the |
820 | * root hash decides. */ | |
89e62e0b | 821 | if (verity && verity->root_hash) |
e0f9e7bd | 822 | return -EADDRNOTAVAIL; |
8c1be37e | 823 | |
e0f9e7bd LP |
824 | /* If we didn't find a generic node, then we can't fix this up either */ |
825 | if (!generic_node) | |
826 | return -ENXIO; | |
827 | ||
828 | /* If we didn't find a properly marked root partition, but we did find a single suitable | |
829 | * generic Linux partition, then use this as root partition, if the caller asked for it. */ | |
8c1be37e LP |
830 | if (multiple_generic) |
831 | return -ENOTUNIQ; | |
832 | ||
f5215bc8 | 833 | options = mount_options_from_designator(mount_options, PARTITION_ROOT); |
18d73705 LB |
834 | if (options) { |
835 | o = strdup(options); | |
836 | if (!o) | |
837 | return -ENOMEM; | |
838 | } | |
839 | ||
8c1be37e LP |
840 | m->partitions[PARTITION_ROOT] = (DissectedPartition) { |
841 | .found = true, | |
842 | .rw = generic_rw, | |
843 | .partno = generic_nr, | |
844 | .architecture = _ARCHITECTURE_INVALID, | |
1cc6c93a | 845 | .node = TAKE_PTR(generic_node), |
be30ad41 | 846 | .uuid = generic_uuid, |
18d73705 | 847 | .mount_options = TAKE_PTR(o), |
8c1be37e | 848 | }; |
e0f9e7bd | 849 | } |
8c1be37e LP |
850 | } |
851 | ||
89e62e0b | 852 | if (verity && verity->root_hash) { |
e0f9e7bd | 853 | if (!m->partitions[PARTITION_ROOT_VERITY].found || !m->partitions[PARTITION_ROOT].found) |
4623e8e6 | 854 | return -EADDRNOTAVAIL; |
4623e8e6 LP |
855 | |
856 | /* If we found a verity setup, then the root partition is necessarily read-only. */ | |
857 | m->partitions[PARTITION_ROOT].rw = false; | |
858 | ||
859 | m->verity = true; | |
860 | } | |
861 | ||
18b5886e LP |
862 | blkid_free_probe(b); |
863 | b = NULL; | |
864 | ||
8c1be37e | 865 | /* Fill in file system types if we don't know them yet. */ |
569a0e42 | 866 | for (PartitionDesignator i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) { |
18b5886e | 867 | DissectedPartition *p = m->partitions + i; |
8c1be37e | 868 | |
18b5886e | 869 | if (!p->found) |
8c1be37e LP |
870 | continue; |
871 | ||
18b5886e LP |
872 | if (!p->fstype && p->node) { |
873 | r = probe_filesystem(p->node, &p->fstype); | |
7cc84b2c | 874 | if (r < 0 && r != -EUCLEAN) |
18b5886e | 875 | return r; |
8c1be37e LP |
876 | } |
877 | ||
18b5886e LP |
878 | if (streq_ptr(p->fstype, "crypto_LUKS")) |
879 | m->encrypted = true; | |
896f937f LP |
880 | |
881 | if (p->fstype && fstype_is_ro(p->fstype)) | |
882 | p->rw = false; | |
8c1be37e LP |
883 | } |
884 | ||
1cc6c93a | 885 | *ret = TAKE_PTR(m); |
8c1be37e LP |
886 | |
887 | return 0; | |
888 | #else | |
889 | return -EOPNOTSUPP; | |
890 | #endif | |
891 | } | |
892 | ||
893 | DissectedImage* dissected_image_unref(DissectedImage *m) { | |
8c1be37e LP |
894 | if (!m) |
895 | return NULL; | |
896 | ||
569a0e42 | 897 | for (PartitionDesignator i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) { |
8c1be37e LP |
898 | free(m->partitions[i].fstype); |
899 | free(m->partitions[i].node); | |
18b5886e LP |
900 | free(m->partitions[i].decrypted_fstype); |
901 | free(m->partitions[i].decrypted_node); | |
18d73705 | 902 | free(m->partitions[i].mount_options); |
8c1be37e LP |
903 | } |
904 | ||
3b925504 LP |
905 | free(m->hostname); |
906 | strv_free(m->machine_info); | |
907 | strv_free(m->os_release); | |
908 | ||
5fecf46d | 909 | return mfree(m); |
8c1be37e LP |
910 | } |
911 | ||
18b5886e | 912 | static int is_loop_device(const char *path) { |
553e15f2 | 913 | char s[SYS_BLOCK_PATH_MAX("/../loop/")]; |
18b5886e LP |
914 | struct stat st; |
915 | ||
916 | assert(path); | |
917 | ||
918 | if (stat(path, &st) < 0) | |
919 | return -errno; | |
920 | ||
921 | if (!S_ISBLK(st.st_mode)) | |
922 | return -ENOTBLK; | |
923 | ||
553e15f2 | 924 | xsprintf_sys_block_path(s, "/loop/", st.st_dev); |
18b5886e LP |
925 | if (access(s, F_OK) < 0) { |
926 | if (errno != ENOENT) | |
927 | return -errno; | |
928 | ||
929 | /* The device itself isn't a loop device, but maybe it's a partition and its parent is? */ | |
553e15f2 | 930 | xsprintf_sys_block_path(s, "/../loop/", st.st_dev); |
18b5886e LP |
931 | if (access(s, F_OK) < 0) |
932 | return errno == ENOENT ? false : -errno; | |
933 | } | |
934 | ||
935 | return true; | |
936 | } | |
937 | ||
cf32c486 LP |
938 | static int run_fsck(const char *node, const char *fstype) { |
939 | int r, exit_status; | |
940 | pid_t pid; | |
941 | ||
942 | assert(node); | |
943 | assert(fstype); | |
944 | ||
945 | r = fsck_exists(fstype); | |
946 | if (r < 0) { | |
947 | log_debug_errno(r, "Couldn't determine whether fsck for %s exists, proceeding anyway.", fstype); | |
948 | return 0; | |
949 | } | |
950 | if (r == 0) { | |
951 | log_debug("Not checking partition %s, as fsck for %s does not exist.", node, fstype); | |
952 | return 0; | |
953 | } | |
954 | ||
955 | r = safe_fork("(fsck)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_DEATHSIG|FORK_NULL_STDIO, &pid); | |
956 | if (r < 0) | |
957 | return log_debug_errno(r, "Failed to fork off fsck: %m"); | |
958 | if (r == 0) { | |
959 | /* Child */ | |
960 | execl("/sbin/fsck", "/sbin/fsck", "-aT", node, NULL); | |
961 | log_debug_errno(errno, "Failed to execl() fsck: %m"); | |
962 | _exit(FSCK_OPERATIONAL_ERROR); | |
963 | } | |
964 | ||
965 | exit_status = wait_for_terminate_and_check("fsck", pid, 0); | |
966 | if (exit_status < 0) | |
967 | return log_debug_errno(exit_status, "Failed to fork off /sbin/fsck: %m"); | |
968 | ||
969 | if ((exit_status & ~FSCK_ERROR_CORRECTED) != FSCK_SUCCESS) { | |
970 | log_debug("fsck failed with exit status %i.", exit_status); | |
971 | ||
972 | if ((exit_status & (FSCK_SYSTEM_SHOULD_REBOOT|FSCK_ERRORS_LEFT_UNCORRECTED)) != 0) | |
973 | return log_debug_errno(SYNTHETIC_ERRNO(EUCLEAN), "File system is corrupted, refusing."); | |
974 | ||
975 | log_debug("Ignoring fsck error."); | |
976 | } | |
977 | ||
978 | return 0; | |
979 | } | |
980 | ||
18b5886e LP |
981 | static int mount_partition( |
982 | DissectedPartition *m, | |
983 | const char *where, | |
984 | const char *directory, | |
2d3a5a73 | 985 | uid_t uid_shift, |
18b5886e LP |
986 | DissectImageFlags flags) { |
987 | ||
2d3a5a73 LP |
988 | _cleanup_free_ char *chased = NULL, *options = NULL; |
989 | const char *p, *node, *fstype; | |
8c1be37e | 990 | bool rw; |
2eedfd2d | 991 | int r; |
8c1be37e LP |
992 | |
993 | assert(m); | |
994 | assert(where); | |
995 | ||
4dc28665 | 996 | /* Use decrypted node and matching fstype if available, otherwise use the original device */ |
18b5886e | 997 | node = m->decrypted_node ?: m->node; |
4dc28665 | 998 | fstype = m->decrypted_node ? m->decrypted_fstype: m->fstype; |
18b5886e | 999 | |
4dc28665 | 1000 | if (!m->found || !node) |
8c1be37e | 1001 | return 0; |
4dc28665 LP |
1002 | if (!fstype) |
1003 | return -EAFNOSUPPORT; | |
8c1be37e | 1004 | |
fa45d12c | 1005 | /* We are looking at an encrypted partition? This either means stacked encryption, or the caller didn't call dissected_image_decrypt() beforehand. Let's return a recognizable error for this case. */ |
4dc28665 | 1006 | if (streq(fstype, "crypto_LUKS")) |
fa45d12c | 1007 | return -EUNATCH; |
18b5886e LP |
1008 | |
1009 | rw = m->rw && !(flags & DISSECT_IMAGE_READ_ONLY); | |
8c1be37e | 1010 | |
cf32c486 LP |
1011 | if (FLAGS_SET(flags, DISSECT_IMAGE_FSCK) && rw) { |
1012 | r = run_fsck(node, fstype); | |
1013 | if (r < 0) | |
1014 | return r; | |
1015 | } | |
1016 | ||
2eedfd2d | 1017 | if (directory) { |
1f0f82f1 LP |
1018 | if (!FLAGS_SET(flags, DISSECT_IMAGE_READ_ONLY)) { |
1019 | /* Automatically create missing mount points, if necessary. */ | |
1020 | r = mkdir_p_root(where, directory, uid_shift, (gid_t) uid_shift, 0755); | |
1021 | if (r < 0) | |
1022 | return r; | |
1023 | } | |
1024 | ||
a5648b80 | 1025 | r = chase_symlinks(directory, where, CHASE_PREFIX_ROOT, &chased, NULL); |
2eedfd2d LP |
1026 | if (r < 0) |
1027 | return r; | |
1028 | ||
1029 | p = chased; | |
1030 | } else | |
8c1be37e LP |
1031 | p = where; |
1032 | ||
18b5886e | 1033 | /* If requested, turn on discard support. */ |
154d2269 | 1034 | if (fstype_can_discard(fstype) && |
18b5886e | 1035 | ((flags & DISSECT_IMAGE_DISCARD) || |
3afda7c7 | 1036 | ((flags & DISSECT_IMAGE_DISCARD_ON_LOOP) && is_loop_device(m->node) > 0))) { |
2d3a5a73 LP |
1037 | options = strdup("discard"); |
1038 | if (!options) | |
1039 | return -ENOMEM; | |
1040 | } | |
1041 | ||
1042 | if (uid_is_valid(uid_shift) && uid_shift != 0 && fstype_can_uid_gid(fstype)) { | |
1043 | _cleanup_free_ char *uid_option = NULL; | |
1044 | ||
1045 | if (asprintf(&uid_option, "uid=" UID_FMT ",gid=" GID_FMT, uid_shift, (gid_t) uid_shift) < 0) | |
1046 | return -ENOMEM; | |
1047 | ||
1048 | if (!strextend_with_separator(&options, ",", uid_option, NULL)) | |
1049 | return -ENOMEM; | |
1050 | } | |
8c1be37e | 1051 | |
18d73705 LB |
1052 | if (!isempty(m->mount_options)) |
1053 | if (!strextend_with_separator(&options, ",", m->mount_options, NULL)) | |
1054 | return -ENOMEM; | |
1055 | ||
5c05f062 LP |
1056 | if (FLAGS_SET(flags, DISSECT_IMAGE_MKDIR)) { |
1057 | r = mkdir_p(p, 0755); | |
1058 | if (r < 0) | |
1059 | return r; | |
1060 | } | |
1061 | ||
d9223c07 LP |
1062 | r = mount_verbose(LOG_DEBUG, node, p, fstype, MS_NODEV|(rw ? 0 : MS_RDONLY), options); |
1063 | if (r < 0) | |
1064 | return r; | |
1065 | ||
1066 | return 1; | |
8c1be37e LP |
1067 | } |
1068 | ||
2d3a5a73 | 1069 | int dissected_image_mount(DissectedImage *m, const char *where, uid_t uid_shift, DissectImageFlags flags) { |
1f0f82f1 | 1070 | int r, xbootldr_mounted; |
8c1be37e LP |
1071 | |
1072 | assert(m); | |
1073 | assert(where); | |
1074 | ||
fa45d12c LP |
1075 | /* Returns: |
1076 | * | |
1077 | * -ENXIO → No root partition found | |
1078 | * -EMEDIUMTYPE → DISSECT_IMAGE_VALIDATE_OS set but no os-release file found | |
1079 | * -EUNATCH → Encrypted partition found for which no dm-crypt was set up yet | |
1080 | * -EUCLEAN → fsck for file system failed | |
1081 | * -EBUSY → File system already mounted/used elsewhere (kernel) | |
4dc28665 | 1082 | * -EAFNOSUPPORT → File system type not supported or not known |
fa45d12c LP |
1083 | */ |
1084 | ||
8c1be37e LP |
1085 | if (!m->partitions[PARTITION_ROOT].found) |
1086 | return -ENXIO; | |
1087 | ||
2d3a5a73 LP |
1088 | if ((flags & DISSECT_IMAGE_MOUNT_NON_ROOT_ONLY) == 0) { |
1089 | r = mount_partition(m->partitions + PARTITION_ROOT, where, NULL, uid_shift, flags); | |
1090 | if (r < 0) | |
1091 | return r; | |
03bcb6d4 LP |
1092 | |
1093 | if (flags & DISSECT_IMAGE_VALIDATE_OS) { | |
1094 | r = path_is_os_tree(where); | |
1095 | if (r < 0) | |
1096 | return r; | |
1097 | if (r == 0) | |
1098 | return -EMEDIUMTYPE; | |
1099 | } | |
2d3a5a73 LP |
1100 | } |
1101 | ||
705727fd | 1102 | if (flags & DISSECT_IMAGE_MOUNT_ROOT_ONLY) |
2d3a5a73 | 1103 | return 0; |
8c1be37e | 1104 | |
5c05f062 LP |
1105 | /* Mask DISSECT_IMAGE_MKDIR for all subdirs: the idea is that only the top-level mount point is |
1106 | * created if needed, but the image itself not modified. */ | |
1107 | flags &= ~DISSECT_IMAGE_MKDIR; | |
1108 | ||
2d3a5a73 | 1109 | r = mount_partition(m->partitions + PARTITION_HOME, where, "/home", uid_shift, flags); |
8c1be37e LP |
1110 | if (r < 0) |
1111 | return r; | |
1112 | ||
2d3a5a73 | 1113 | r = mount_partition(m->partitions + PARTITION_SRV, where, "/srv", uid_shift, flags); |
8c1be37e LP |
1114 | if (r < 0) |
1115 | return r; | |
1116 | ||
d4dffb85 LP |
1117 | r = mount_partition(m->partitions + PARTITION_VAR, where, "/var", uid_shift, flags); |
1118 | if (r < 0) | |
1119 | return r; | |
1120 | ||
1121 | r = mount_partition(m->partitions + PARTITION_TMP, where, "/var/tmp", uid_shift, flags); | |
1122 | if (r < 0) | |
1123 | return r; | |
1124 | ||
1f0f82f1 LP |
1125 | xbootldr_mounted = mount_partition(m->partitions + PARTITION_XBOOTLDR, where, "/boot", uid_shift, flags); |
1126 | if (xbootldr_mounted < 0) | |
1127 | return xbootldr_mounted; | |
d9223c07 | 1128 | |
8c1be37e | 1129 | if (m->partitions[PARTITION_ESP].found) { |
1f0f82f1 LP |
1130 | int esp_done = false; |
1131 | ||
d9223c07 LP |
1132 | /* Mount the ESP to /efi if it exists. If it doesn't exist, use /boot instead, but only if it |
1133 | * exists and is empty, and we didn't already mount the XBOOTLDR partition into it. */ | |
8c1be37e | 1134 | |
a5648b80 | 1135 | r = chase_symlinks("/efi", where, CHASE_PREFIX_ROOT, NULL, NULL); |
1f0f82f1 LP |
1136 | if (r < 0) { |
1137 | if (r != -ENOENT) | |
d9223c07 | 1138 | return r; |
8c1be37e | 1139 | |
1f0f82f1 LP |
1140 | /* /efi doesn't exist. Let's see if /boot is suitable then */ |
1141 | ||
1142 | if (!xbootldr_mounted) { | |
1143 | _cleanup_free_ char *p = NULL; | |
2eedfd2d | 1144 | |
1f0f82f1 LP |
1145 | r = chase_symlinks("/boot", where, CHASE_PREFIX_ROOT, &p, NULL); |
1146 | if (r < 0) { | |
1147 | if (r != -ENOENT) | |
1148 | return r; | |
1149 | } else if (dir_is_empty(p) > 0) { | |
1150 | /* It exists and is an empty directory. Let's mount the ESP there. */ | |
1151 | r = mount_partition(m->partitions + PARTITION_ESP, where, "/boot", uid_shift, flags); | |
1152 | if (r < 0) | |
1153 | return r; | |
1154 | ||
1155 | esp_done = true; | |
1156 | } | |
2eedfd2d | 1157 | } |
8c1be37e | 1158 | } |
1f0f82f1 LP |
1159 | |
1160 | if (!esp_done) { | |
1161 | /* OK, let's mount the ESP now to /efi (possibly creating the dir if missing) */ | |
1162 | ||
1163 | r = mount_partition(m->partitions + PARTITION_ESP, where, "/efi", uid_shift, flags); | |
1164 | if (r < 0) | |
1165 | return r; | |
1166 | } | |
8c1be37e LP |
1167 | } |
1168 | ||
1169 | return 0; | |
1170 | } | |
1171 | ||
af187ab2 LP |
1172 | int dissected_image_mount_and_warn(DissectedImage *m, const char *where, uid_t uid_shift, DissectImageFlags flags) { |
1173 | int r; | |
1174 | ||
1175 | assert(m); | |
1176 | assert(where); | |
1177 | ||
1178 | r = dissected_image_mount(m, where, uid_shift, flags); | |
1179 | if (r == -ENXIO) | |
1180 | return log_error_errno(r, "Not root file system found in image."); | |
1181 | if (r == -EMEDIUMTYPE) | |
1182 | return log_error_errno(r, "No suitable os-release file in image found."); | |
1183 | if (r == -EUNATCH) | |
1184 | return log_error_errno(r, "Encrypted file system discovered, but decryption not requested."); | |
1185 | if (r == -EUCLEAN) | |
1186 | return log_error_errno(r, "File system check on image failed."); | |
1187 | if (r == -EBUSY) | |
1188 | return log_error_errno(r, "File system already mounted elsewhere."); | |
4dc28665 LP |
1189 | if (r == -EAFNOSUPPORT) |
1190 | return log_error_errno(r, "File system type not supported or not known."); | |
af187ab2 LP |
1191 | if (r < 0) |
1192 | return log_error_errno(r, "Failed to mount image: %m"); | |
1193 | ||
1194 | return r; | |
1195 | } | |
1196 | ||
349cc4a5 | 1197 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
1198 | typedef struct DecryptedPartition { |
1199 | struct crypt_device *device; | |
1200 | char *name; | |
1201 | bool relinquished; | |
1202 | } DecryptedPartition; | |
1203 | ||
1204 | struct DecryptedImage { | |
1205 | DecryptedPartition *decrypted; | |
1206 | size_t n_decrypted; | |
1207 | size_t n_allocated; | |
1208 | }; | |
1209 | #endif | |
1210 | ||
1211 | DecryptedImage* decrypted_image_unref(DecryptedImage* d) { | |
349cc4a5 | 1212 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
1213 | size_t i; |
1214 | int r; | |
1215 | ||
1216 | if (!d) | |
1217 | return NULL; | |
1218 | ||
1219 | for (i = 0; i < d->n_decrypted; i++) { | |
1220 | DecryptedPartition *p = d->decrypted + i; | |
1221 | ||
1222 | if (p->device && p->name && !p->relinquished) { | |
0d12936d | 1223 | r = sym_crypt_deactivate_by_name(p->device, p->name, 0); |
18b5886e LP |
1224 | if (r < 0) |
1225 | log_debug_errno(r, "Failed to deactivate encrypted partition %s", p->name); | |
1226 | } | |
1227 | ||
1228 | if (p->device) | |
0d12936d | 1229 | sym_crypt_free(p->device); |
18b5886e LP |
1230 | free(p->name); |
1231 | } | |
1232 | ||
1233 | free(d); | |
1234 | #endif | |
1235 | return NULL; | |
1236 | } | |
1237 | ||
349cc4a5 | 1238 | #if HAVE_LIBCRYPTSETUP |
4623e8e6 LP |
1239 | |
1240 | static int make_dm_name_and_node(const void *original_node, const char *suffix, char **ret_name, char **ret_node) { | |
1241 | _cleanup_free_ char *name = NULL, *node = NULL; | |
1242 | const char *base; | |
1243 | ||
1244 | assert(original_node); | |
1245 | assert(suffix); | |
1246 | assert(ret_name); | |
1247 | assert(ret_node); | |
1248 | ||
1249 | base = strrchr(original_node, '/'); | |
1250 | if (!base) | |
ac1f3ad0 LB |
1251 | base = original_node; |
1252 | else | |
1253 | base++; | |
4623e8e6 LP |
1254 | if (isempty(base)) |
1255 | return -EINVAL; | |
1256 | ||
1257 | name = strjoin(base, suffix); | |
1258 | if (!name) | |
1259 | return -ENOMEM; | |
1260 | if (!filename_is_valid(name)) | |
1261 | return -EINVAL; | |
1262 | ||
0d12936d | 1263 | node = path_join(sym_crypt_get_dir(), name); |
4623e8e6 LP |
1264 | if (!node) |
1265 | return -ENOMEM; | |
1266 | ||
1cc6c93a YW |
1267 | *ret_name = TAKE_PTR(name); |
1268 | *ret_node = TAKE_PTR(node); | |
4623e8e6 | 1269 | |
4623e8e6 LP |
1270 | return 0; |
1271 | } | |
1272 | ||
18b5886e LP |
1273 | static int decrypt_partition( |
1274 | DissectedPartition *m, | |
1275 | const char *passphrase, | |
1276 | DissectImageFlags flags, | |
1277 | DecryptedImage *d) { | |
1278 | ||
1279 | _cleanup_free_ char *node = NULL, *name = NULL; | |
0d12936d | 1280 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
18b5886e LP |
1281 | int r; |
1282 | ||
1283 | assert(m); | |
1284 | assert(d); | |
1285 | ||
1286 | if (!m->found || !m->node || !m->fstype) | |
1287 | return 0; | |
1288 | ||
1289 | if (!streq(m->fstype, "crypto_LUKS")) | |
1290 | return 0; | |
1291 | ||
bdd73ac5 ZJS |
1292 | if (!passphrase) |
1293 | return -ENOKEY; | |
1294 | ||
0d12936d LP |
1295 | r = dlopen_cryptsetup(); |
1296 | if (r < 0) | |
1297 | return r; | |
1298 | ||
4623e8e6 LP |
1299 | r = make_dm_name_and_node(m->node, "-decrypted", &name, &node); |
1300 | if (r < 0) | |
1301 | return r; | |
18b5886e LP |
1302 | |
1303 | if (!GREEDY_REALLOC0(d->decrypted, d->n_allocated, d->n_decrypted + 1)) | |
1304 | return -ENOMEM; | |
1305 | ||
0d12936d | 1306 | r = sym_crypt_init(&cd, m->node); |
18b5886e | 1307 | if (r < 0) |
715cbb81 | 1308 | return log_debug_errno(r, "Failed to initialize dm-crypt: %m"); |
18b5886e | 1309 | |
efc3b12f | 1310 | cryptsetup_enable_logging(cd); |
1887032f | 1311 | |
0d12936d | 1312 | r = sym_crypt_load(cd, CRYPT_LUKS, NULL); |
294bd454 ZJS |
1313 | if (r < 0) |
1314 | return log_debug_errno(r, "Failed to load LUKS metadata: %m"); | |
18b5886e | 1315 | |
0d12936d LP |
1316 | r = sym_crypt_activate_by_passphrase(cd, name, CRYPT_ANY_SLOT, passphrase, strlen(passphrase), |
1317 | ((flags & DISSECT_IMAGE_READ_ONLY) ? CRYPT_ACTIVATE_READONLY : 0) | | |
1318 | ((flags & DISSECT_IMAGE_DISCARD_ON_CRYPTO) ? CRYPT_ACTIVATE_ALLOW_DISCARDS : 0)); | |
294bd454 | 1319 | if (r < 0) { |
715cbb81 | 1320 | log_debug_errno(r, "Failed to activate LUKS device: %m"); |
294bd454 | 1321 | return r == -EPERM ? -EKEYREJECTED : r; |
18b5886e | 1322 | } |
18b5886e | 1323 | |
94344385 LP |
1324 | d->decrypted[d->n_decrypted++] = (DecryptedPartition) { |
1325 | .name = TAKE_PTR(name), | |
1326 | .device = TAKE_PTR(cd), | |
1327 | }; | |
18b5886e | 1328 | |
1cc6c93a | 1329 | m->decrypted_node = TAKE_PTR(node); |
18b5886e LP |
1330 | |
1331 | return 0; | |
4623e8e6 LP |
1332 | } |
1333 | ||
89e62e0b LP |
1334 | static int verity_can_reuse( |
1335 | const VeritySettings *verity, | |
1336 | const char *name, | |
1337 | struct crypt_device **ret_cd) { | |
1338 | ||
ac1f3ad0 LB |
1339 | /* If the same volume was already open, check that the root hashes match, and reuse it if they do */ |
1340 | _cleanup_free_ char *root_hash_existing = NULL; | |
0d12936d | 1341 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
ac1f3ad0 | 1342 | struct crypt_params_verity crypt_params = {}; |
89e62e0b | 1343 | size_t root_hash_existing_size; |
ac1f3ad0 LB |
1344 | int r; |
1345 | ||
89e62e0b LP |
1346 | assert(verity); |
1347 | assert(name); | |
ac1f3ad0 LB |
1348 | assert(ret_cd); |
1349 | ||
0d12936d | 1350 | r = sym_crypt_init_by_name(&cd, name); |
ac1f3ad0 LB |
1351 | if (r < 0) |
1352 | return log_debug_errno(r, "Error opening verity device, crypt_init_by_name failed: %m"); | |
0d12936d LP |
1353 | |
1354 | r = sym_crypt_get_verity_info(cd, &crypt_params); | |
ac1f3ad0 LB |
1355 | if (r < 0) |
1356 | return log_debug_errno(r, "Error opening verity device, crypt_get_verity_info failed: %m"); | |
0d12936d | 1357 | |
89e62e0b LP |
1358 | root_hash_existing_size = verity->root_hash_size; |
1359 | root_hash_existing = malloc0(root_hash_existing_size); | |
ac1f3ad0 LB |
1360 | if (!root_hash_existing) |
1361 | return -ENOMEM; | |
0d12936d LP |
1362 | |
1363 | r = sym_crypt_volume_key_get(cd, CRYPT_ANY_SLOT, root_hash_existing, &root_hash_existing_size, NULL, 0); | |
ac1f3ad0 LB |
1364 | if (r < 0) |
1365 | return log_debug_errno(r, "Error opening verity device, crypt_volume_key_get failed: %m"); | |
89e62e0b LP |
1366 | if (verity->root_hash_size != root_hash_existing_size || |
1367 | memcmp(root_hash_existing, verity->root_hash, verity->root_hash_size) != 0) | |
ac1f3ad0 | 1368 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Error opening verity device, it already exists but root hashes are different."); |
89e62e0b | 1369 | |
ac1f3ad0 | 1370 | #if HAVE_CRYPT_ACTIVATE_BY_SIGNED_KEY |
89e62e0b LP |
1371 | /* Ensure that, if signatures are supported, we only reuse the device if the previous mount used the |
1372 | * same settings, so that a previous unsigned mount will not be reused if the user asks to use | |
1373 | * signing for the new one, and viceversa. */ | |
1374 | if (!!verity->root_hash_sig != !!(crypt_params.flags & CRYPT_VERITY_ROOT_HASH_SIGNATURE)) | |
ac1f3ad0 LB |
1375 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Error opening verity device, it already exists but signature settings are not the same."); |
1376 | #endif | |
1377 | ||
1378 | *ret_cd = TAKE_PTR(cd); | |
1379 | return 0; | |
1380 | } | |
1381 | ||
1382 | static inline void dm_deferred_remove_clean(char *name) { | |
1383 | if (!name) | |
1384 | return; | |
0d12936d LP |
1385 | |
1386 | (void) sym_crypt_deactivate_by_name(NULL, name, CRYPT_DEACTIVATE_DEFERRED); | |
ac1f3ad0 LB |
1387 | free(name); |
1388 | } | |
1389 | DEFINE_TRIVIAL_CLEANUP_FUNC(char *, dm_deferred_remove_clean); | |
1390 | ||
4623e8e6 LP |
1391 | static int verity_partition( |
1392 | DissectedPartition *m, | |
1393 | DissectedPartition *v, | |
89e62e0b | 1394 | const VeritySettings *verity, |
4623e8e6 LP |
1395 | DissectImageFlags flags, |
1396 | DecryptedImage *d) { | |
1397 | ||
0d12936d | 1398 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
ac1f3ad0 | 1399 | _cleanup_(dm_deferred_remove_cleanp) char *restore_deferred_remove = NULL; |
89e62e0b | 1400 | _cleanup_free_ char *node = NULL, *name = NULL; |
4623e8e6 LP |
1401 | int r; |
1402 | ||
1403 | assert(m); | |
89e62e0b | 1404 | assert(v || (verity && verity->data_path)); |
4623e8e6 | 1405 | |
89e62e0b | 1406 | if (!verity || !verity->root_hash) |
4623e8e6 LP |
1407 | return 0; |
1408 | ||
1409 | if (!m->found || !m->node || !m->fstype) | |
1410 | return 0; | |
89e62e0b | 1411 | if (!verity->data_path) { |
e7cbe5cb LB |
1412 | if (!v->found || !v->node || !v->fstype) |
1413 | return 0; | |
4623e8e6 | 1414 | |
e7cbe5cb LB |
1415 | if (!streq(v->fstype, "DM_verity_hash")) |
1416 | return 0; | |
1417 | } | |
4623e8e6 | 1418 | |
0d12936d LP |
1419 | r = dlopen_cryptsetup(); |
1420 | if (r < 0) | |
1421 | return r; | |
1422 | ||
ac1f3ad0 LB |
1423 | if (FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) { |
1424 | /* Use the roothash, which is unique per volume, as the device node name, so that it can be reused */ | |
1425 | _cleanup_free_ char *root_hash_encoded = NULL; | |
0d12936d | 1426 | |
89e62e0b | 1427 | root_hash_encoded = hexmem(verity->root_hash, verity->root_hash_size); |
ac1f3ad0 | 1428 | if (!root_hash_encoded) |
0d12936d | 1429 | |
ac1f3ad0 LB |
1430 | return -ENOMEM; |
1431 | r = make_dm_name_and_node(root_hash_encoded, "-verity", &name, &node); | |
1432 | } else | |
1433 | r = make_dm_name_and_node(m->node, "-verity", &name, &node); | |
4623e8e6 LP |
1434 | if (r < 0) |
1435 | return r; | |
1436 | ||
89e62e0b | 1437 | r = sym_crypt_init(&cd, verity->data_path ?: v->node); |
4623e8e6 LP |
1438 | if (r < 0) |
1439 | return r; | |
1440 | ||
efc3b12f | 1441 | cryptsetup_enable_logging(cd); |
1887032f | 1442 | |
0d12936d | 1443 | r = sym_crypt_load(cd, CRYPT_VERITY, NULL); |
4623e8e6 | 1444 | if (r < 0) |
294bd454 | 1445 | return r; |
4623e8e6 | 1446 | |
0d12936d | 1447 | r = sym_crypt_set_data_device(cd, m->node); |
4623e8e6 | 1448 | if (r < 0) |
294bd454 | 1449 | return r; |
4623e8e6 | 1450 | |
ac1f3ad0 LB |
1451 | if (!GREEDY_REALLOC0(d->decrypted, d->n_allocated, d->n_decrypted + 1)) |
1452 | return -ENOMEM; | |
1453 | ||
1454 | /* If activating fails because the device already exists, check the metadata and reuse it if it matches. | |
1455 | * In case of ENODEV/ENOENT, which can happen if another process is activating at the exact same time, | |
1456 | * retry a few times before giving up. */ | |
1457 | for (unsigned i = 0; i < N_DEVICE_NODE_LIST_ATTEMPTS; i++) { | |
89e62e0b | 1458 | if (verity->root_hash_sig) { |
c2923fdc | 1459 | #if HAVE_CRYPT_ACTIVATE_BY_SIGNED_KEY |
89e62e0b LP |
1460 | r = sym_crypt_activate_by_signed_key( |
1461 | cd, | |
1462 | name, | |
1463 | verity->root_hash, | |
1464 | verity->root_hash_size, | |
1465 | verity->root_hash_sig, | |
1466 | verity->root_hash_sig_size, | |
1467 | CRYPT_ACTIVATE_READONLY); | |
ac1f3ad0 | 1468 | #else |
22043172 LP |
1469 | r = log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), |
1470 | "Activation of verity device with signature requested, but not supported by %s due to missing crypt_activate_by_signed_key().", program_invocation_short_name); | |
ac1f3ad0 LB |
1471 | #endif |
1472 | } else | |
89e62e0b LP |
1473 | r = sym_crypt_activate_by_volume_key( |
1474 | cd, | |
1475 | name, | |
1476 | verity->root_hash, | |
1477 | verity->root_hash_size, | |
1478 | CRYPT_ACTIVATE_READONLY); | |
ac1f3ad0 LB |
1479 | /* libdevmapper can return EINVAL when the device is already in the activation stage. |
1480 | * There's no way to distinguish this situation from a genuine error due to invalid | |
2aed63f4 | 1481 | * parameters, so immediately fall back to activating the device with a unique name. |
89e62e0b LP |
1482 | * Improvements in libcrypsetup can ensure this never happens: |
1483 | * https://gitlab.com/cryptsetup/cryptsetup/-/merge_requests/96 */ | |
ac1f3ad0 | 1484 | if (r == -EINVAL && FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) |
89e62e0b | 1485 | return verity_partition(m, v, verity, flags & ~DISSECT_IMAGE_VERITY_SHARE, d); |
9ecb5c10 | 1486 | if (!IN_SET(r, |
22043172 | 1487 | 0, /* Success */ |
9ecb5c10 | 1488 | -EEXIST, /* Volume is already open and ready to be used */ |
22043172 LP |
1489 | -EBUSY, /* Volume is being opened but not ready, crypt_init_by_name can fetch details */ |
1490 | -ENODEV /* Volume is being opened but not ready, crypt_init_by_name would fail, try to open again */)) | |
ac1f3ad0 | 1491 | return r; |
9ecb5c10 | 1492 | if (IN_SET(r, -EEXIST, -EBUSY)) { |
ac1f3ad0 | 1493 | struct crypt_device *existing_cd = NULL; |
c2923fdc | 1494 | |
ac1f3ad0 LB |
1495 | if (!restore_deferred_remove){ |
1496 | /* To avoid races, disable automatic removal on umount while setting up the new device. Restore it on failure. */ | |
1497 | r = dm_deferred_remove_cancel(name); | |
9ecb5c10 LB |
1498 | /* If activation returns EBUSY there might be no deferred removal to cancel, that's fine */ |
1499 | if (r < 0 && r != -ENXIO) | |
ac1f3ad0 | 1500 | return log_debug_errno(r, "Disabling automated deferred removal for verity device %s failed: %m", node); |
9ecb5c10 LB |
1501 | if (r == 0) { |
1502 | restore_deferred_remove = strdup(name); | |
1503 | if (!restore_deferred_remove) | |
1504 | return -ENOMEM; | |
1505 | } | |
ac1f3ad0 | 1506 | } |
c2923fdc | 1507 | |
89e62e0b | 1508 | r = verity_can_reuse(verity, name, &existing_cd); |
ac1f3ad0 LB |
1509 | /* Same as above, -EINVAL can randomly happen when it actually means -EEXIST */ |
1510 | if (r == -EINVAL && FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) | |
89e62e0b | 1511 | return verity_partition(m, v, verity, flags & ~DISSECT_IMAGE_VERITY_SHARE, d); |
9ecb5c10 | 1512 | if (!IN_SET(r, 0, -ENODEV, -ENOENT, -EBUSY)) |
ac1f3ad0 LB |
1513 | return log_debug_errno(r, "Checking whether existing verity device %s can be reused failed: %m", node); |
1514 | if (r == 0) { | |
c419b6f0 LB |
1515 | /* devmapper might say that the device exists, but the devlink might not yet have been |
1516 | * created. Check and wait for the udev event in that case. */ | |
1517 | r = device_wait_for_devlink(node, "block", 100 * USEC_PER_MSEC, NULL); | |
1518 | /* Fallback to activation with a unique device if it's taking too long */ | |
1519 | if (r == -ETIMEDOUT) | |
1520 | break; | |
1521 | if (r < 0) | |
1522 | return r; | |
1523 | ||
ac1f3ad0 | 1524 | if (cd) |
0d12936d | 1525 | sym_crypt_free(cd); |
ac1f3ad0 LB |
1526 | cd = existing_cd; |
1527 | } | |
c2923fdc | 1528 | } |
ac1f3ad0 LB |
1529 | if (r == 0) |
1530 | break; | |
ecab4c47 LB |
1531 | |
1532 | /* Device is being opened by another process, but it has not finished yet, yield for 2ms */ | |
1533 | (void) usleep(2 * USEC_PER_MSEC); | |
ac1f3ad0 LB |
1534 | } |
1535 | ||
ac1f3ad0 LB |
1536 | /* An existing verity device was reported by libcryptsetup/libdevmapper, but we can't use it at this time. |
1537 | * Fall back to activating it with a unique device name. */ | |
1538 | if (r != 0 && FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) | |
89e62e0b | 1539 | return verity_partition(m, v, verity, flags & ~DISSECT_IMAGE_VERITY_SHARE, d); |
ac1f3ad0 LB |
1540 | |
1541 | /* Everything looks good and we'll be able to mount the device, so deferred remove will be re-enabled at that point. */ | |
1542 | restore_deferred_remove = mfree(restore_deferred_remove); | |
4623e8e6 | 1543 | |
94344385 LP |
1544 | d->decrypted[d->n_decrypted++] = (DecryptedPartition) { |
1545 | .name = TAKE_PTR(name), | |
1546 | .device = TAKE_PTR(cd), | |
1547 | }; | |
4623e8e6 | 1548 | |
1cc6c93a | 1549 | m->decrypted_node = TAKE_PTR(node); |
4623e8e6 LP |
1550 | |
1551 | return 0; | |
18b5886e LP |
1552 | } |
1553 | #endif | |
1554 | ||
1555 | int dissected_image_decrypt( | |
1556 | DissectedImage *m, | |
1557 | const char *passphrase, | |
89e62e0b | 1558 | const VeritySettings *verity, |
18b5886e LP |
1559 | DissectImageFlags flags, |
1560 | DecryptedImage **ret) { | |
1561 | ||
349cc4a5 | 1562 | #if HAVE_LIBCRYPTSETUP |
49b5b3b4 | 1563 | _cleanup_(decrypted_image_unrefp) DecryptedImage *d = NULL; |
18b5886e LP |
1564 | int r; |
1565 | #endif | |
1566 | ||
1567 | assert(m); | |
89e62e0b | 1568 | assert(!verity || verity->root_hash || verity->root_hash_size == 0); |
18b5886e LP |
1569 | |
1570 | /* Returns: | |
1571 | * | |
1572 | * = 0 → There was nothing to decrypt | |
1573 | * > 0 → Decrypted successfully | |
d1c536f5 | 1574 | * -ENOKEY → There's something to decrypt but no key was supplied |
18b5886e LP |
1575 | * -EKEYREJECTED → Passed key was not correct |
1576 | */ | |
1577 | ||
89e62e0b | 1578 | if (verity && verity->root_hash && verity->root_hash_size < sizeof(sd_id128_t)) |
4623e8e6 LP |
1579 | return -EINVAL; |
1580 | ||
1581 | if (!m->encrypted && !m->verity) { | |
18b5886e LP |
1582 | *ret = NULL; |
1583 | return 0; | |
1584 | } | |
1585 | ||
349cc4a5 | 1586 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
1587 | d = new0(DecryptedImage, 1); |
1588 | if (!d) | |
1589 | return -ENOMEM; | |
1590 | ||
569a0e42 | 1591 | for (PartitionDesignator i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) { |
18b5886e | 1592 | DissectedPartition *p = m->partitions + i; |
22043172 | 1593 | PartitionDesignator k; |
18b5886e LP |
1594 | |
1595 | if (!p->found) | |
1596 | continue; | |
1597 | ||
1598 | r = decrypt_partition(p, passphrase, flags, d); | |
1599 | if (r < 0) | |
1600 | return r; | |
1601 | ||
4623e8e6 LP |
1602 | k = PARTITION_VERITY_OF(i); |
1603 | if (k >= 0) { | |
89e62e0b | 1604 | r = verity_partition(p, m->partitions + k, verity, flags | DISSECT_IMAGE_VERITY_SHARE, d); |
4623e8e6 LP |
1605 | if (r < 0) |
1606 | return r; | |
1607 | } | |
1608 | ||
18b5886e LP |
1609 | if (!p->decrypted_fstype && p->decrypted_node) { |
1610 | r = probe_filesystem(p->decrypted_node, &p->decrypted_fstype); | |
7cc84b2c | 1611 | if (r < 0 && r != -EUCLEAN) |
18b5886e LP |
1612 | return r; |
1613 | } | |
1614 | } | |
1615 | ||
1cc6c93a | 1616 | *ret = TAKE_PTR(d); |
18b5886e LP |
1617 | |
1618 | return 1; | |
1619 | #else | |
1620 | return -EOPNOTSUPP; | |
1621 | #endif | |
1622 | } | |
1623 | ||
1624 | int dissected_image_decrypt_interactively( | |
1625 | DissectedImage *m, | |
1626 | const char *passphrase, | |
89e62e0b | 1627 | const VeritySettings *verity, |
18b5886e LP |
1628 | DissectImageFlags flags, |
1629 | DecryptedImage **ret) { | |
1630 | ||
1631 | _cleanup_strv_free_erase_ char **z = NULL; | |
1632 | int n = 3, r; | |
1633 | ||
1634 | if (passphrase) | |
1635 | n--; | |
1636 | ||
1637 | for (;;) { | |
89e62e0b | 1638 | r = dissected_image_decrypt(m, passphrase, verity, flags, ret); |
18b5886e LP |
1639 | if (r >= 0) |
1640 | return r; | |
1641 | if (r == -EKEYREJECTED) | |
1642 | log_error_errno(r, "Incorrect passphrase, try again!"); | |
fc95c359 YW |
1643 | else if (r != -ENOKEY) |
1644 | return log_error_errno(r, "Failed to decrypt image: %m"); | |
18b5886e | 1645 | |
baaa35ad ZJS |
1646 | if (--n < 0) |
1647 | return log_error_errno(SYNTHETIC_ERRNO(EKEYREJECTED), | |
1648 | "Too many retries."); | |
18b5886e LP |
1649 | |
1650 | z = strv_free(z); | |
1651 | ||
a1c111c2 | 1652 | r = ask_password_auto("Please enter image passphrase:", NULL, "dissect", "dissect", USEC_INFINITY, 0, &z); |
18b5886e LP |
1653 | if (r < 0) |
1654 | return log_error_errno(r, "Failed to query for passphrase: %m"); | |
1655 | ||
1656 | passphrase = z[0]; | |
1657 | } | |
1658 | } | |
1659 | ||
18b5886e LP |
1660 | int decrypted_image_relinquish(DecryptedImage *d) { |
1661 | ||
349cc4a5 | 1662 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
1663 | size_t i; |
1664 | int r; | |
1665 | #endif | |
1666 | ||
1667 | assert(d); | |
1668 | ||
1669 | /* Turns on automatic removal after the last use ended for all DM devices of this image, and sets a boolean so | |
1670 | * that we don't clean it up ourselves either anymore */ | |
1671 | ||
349cc4a5 | 1672 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
1673 | for (i = 0; i < d->n_decrypted; i++) { |
1674 | DecryptedPartition *p = d->decrypted + i; | |
1675 | ||
1676 | if (p->relinquished) | |
1677 | continue; | |
1678 | ||
0d12936d | 1679 | r = sym_crypt_deactivate_by_name(NULL, p->name, CRYPT_DEACTIVATE_DEFERRED); |
18b5886e LP |
1680 | if (r < 0) |
1681 | return log_debug_errno(r, "Failed to mark %s for auto-removal: %m", p->name); | |
1682 | ||
1683 | p->relinquished = true; | |
1684 | } | |
1685 | #endif | |
1686 | ||
1687 | return 0; | |
1688 | } | |
1689 | ||
89e62e0b LP |
1690 | static char *build_auxiliary_path(const char *image, const char *suffix) { |
1691 | const char *e; | |
1692 | char *n; | |
1693 | ||
1694 | assert(image); | |
1695 | assert(suffix); | |
1696 | ||
1697 | e = endswith(image, ".raw"); | |
1698 | if (!e) | |
1699 | return strjoin(e, suffix); | |
1700 | ||
1701 | n = new(char, e - image + strlen(suffix) + 1); | |
1702 | if (!n) | |
1703 | return NULL; | |
1704 | ||
1705 | strcpy(mempcpy(n, image, e - image), suffix); | |
1706 | return n; | |
1707 | } | |
1708 | ||
1709 | void verity_settings_done(VeritySettings *v) { | |
1710 | assert(v); | |
1711 | ||
1712 | v->root_hash = mfree(v->root_hash); | |
1713 | v->root_hash_size = 0; | |
1714 | ||
1715 | v->root_hash_sig = mfree(v->root_hash_sig); | |
1716 | v->root_hash_sig_size = 0; | |
1717 | ||
1718 | v->data_path = mfree(v->data_path); | |
1719 | } | |
1720 | ||
1721 | int verity_settings_load( | |
1722 | VeritySettings *verity, | |
f5ea63a5 LP |
1723 | const char *image, |
1724 | const char *root_hash_path, | |
89e62e0b LP |
1725 | const char *root_hash_sig_path) { |
1726 | ||
1727 | _cleanup_free_ void *root_hash = NULL, *root_hash_sig = NULL; | |
1728 | size_t root_hash_size = 0, root_hash_sig_size = 0; | |
1729 | _cleanup_free_ char *verity_data_path = NULL; | |
78ebe980 LP |
1730 | int r; |
1731 | ||
89e62e0b | 1732 | assert(verity); |
78ebe980 | 1733 | assert(image); |
78ebe980 | 1734 | |
89e62e0b LP |
1735 | /* If we are asked to load the root hash for a device node, exit early */ |
1736 | if (is_device_path(image)) | |
78ebe980 | 1737 | return 0; |
78ebe980 | 1738 | |
89e62e0b | 1739 | /* We only fill in what isn't already filled in */ |
c2923fdc | 1740 | |
89e62e0b | 1741 | if (!verity->root_hash) { |
e7cbe5cb | 1742 | _cleanup_free_ char *text = NULL; |
e7cbe5cb | 1743 | |
0389f4fa | 1744 | if (root_hash_path) { |
0389f4fa LB |
1745 | r = read_one_line_file(root_hash_path, &text); |
1746 | if (r < 0) | |
e7cbe5cb | 1747 | return r; |
0389f4fa LB |
1748 | } else { |
1749 | r = getxattr_malloc(image, "user.verity.roothash", &text, true); | |
1750 | if (r < 0) { | |
89e62e0b | 1751 | _cleanup_free_ char *p = NULL; |
0389f4fa | 1752 | |
89e62e0b | 1753 | if (!IN_SET(r, -ENODATA, -ENOENT) && !ERRNO_IS_NOT_SUPPORTED(r)) |
0389f4fa | 1754 | return r; |
78ebe980 | 1755 | |
89e62e0b LP |
1756 | p = build_auxiliary_path(image, ".roothash"); |
1757 | if (!p) | |
1758 | return -ENOMEM; | |
e7cbe5cb | 1759 | |
89e62e0b | 1760 | r = read_one_line_file(p, &text); |
0389f4fa LB |
1761 | if (r < 0 && r != -ENOENT) |
1762 | return r; | |
1763 | } | |
e7cbe5cb LB |
1764 | } |
1765 | ||
1766 | if (text) { | |
89e62e0b | 1767 | r = unhexmem(text, strlen(text), &root_hash, &root_hash_size); |
e7cbe5cb LB |
1768 | if (r < 0) |
1769 | return r; | |
89e62e0b | 1770 | if (root_hash_size < sizeof(sd_id128_t)) |
e7cbe5cb LB |
1771 | return -EINVAL; |
1772 | } | |
1773 | } | |
1774 | ||
89e62e0b LP |
1775 | if (!verity->root_hash_sig) { |
1776 | _cleanup_free_ char *p = NULL; | |
1777 | ||
1778 | if (!root_hash_sig_path) { | |
1779 | /* Follow naming convention recommended by the relevant RFC: | |
1780 | * https://tools.ietf.org/html/rfc5751#section-3.2.1 */ | |
1781 | p = build_auxiliary_path(image, ".roothash.p7s"); | |
1782 | if (!p) | |
1783 | return -ENOMEM; | |
1784 | ||
1785 | root_hash_sig_path = p; | |
1786 | } | |
1787 | ||
1788 | r = read_full_file_full(AT_FDCWD, root_hash_sig_path, 0, (char**) &root_hash_sig, &root_hash_sig_size); | |
1789 | if (r < 0) { | |
1790 | if (r != -ENOENT) | |
1791 | return r; | |
1792 | } else if (root_hash_sig_size == 0) /* refuse empty size signatures */ | |
1793 | return -EINVAL; | |
1794 | } | |
1795 | ||
1796 | if (!verity->data_path) { | |
1797 | _cleanup_free_ char *p = NULL; | |
1798 | ||
1799 | p = build_auxiliary_path(image, ".verity"); | |
1800 | if (!p) | |
1801 | return -ENOMEM; | |
1802 | ||
1803 | if (access(p, F_OK) < 0) { | |
1804 | if (errno != ENOENT) | |
1805 | return -errno; | |
1806 | } else | |
1807 | verity_data_path = TAKE_PTR(p); | |
1808 | } | |
1809 | ||
1810 | if (root_hash) { | |
1811 | verity->root_hash = TAKE_PTR(root_hash); | |
1812 | verity->root_hash_size = root_hash_size; | |
1813 | } | |
1814 | ||
1815 | if (root_hash_sig) { | |
1816 | verity->root_hash_sig = TAKE_PTR(root_hash_sig); | |
1817 | verity->root_hash_sig_size = root_hash_sig_size; | |
e7cbe5cb | 1818 | } |
89e62e0b LP |
1819 | |
1820 | if (verity_data_path) | |
1821 | verity->data_path = TAKE_PTR(verity_data_path); | |
78ebe980 | 1822 | |
78ebe980 LP |
1823 | return 1; |
1824 | } | |
1825 | ||
3b925504 LP |
1826 | int dissected_image_acquire_metadata(DissectedImage *m) { |
1827 | ||
1828 | enum { | |
1829 | META_HOSTNAME, | |
1830 | META_MACHINE_ID, | |
1831 | META_MACHINE_INFO, | |
1832 | META_OS_RELEASE, | |
1833 | _META_MAX, | |
1834 | }; | |
1835 | ||
1836 | static const char *const paths[_META_MAX] = { | |
1837 | [META_HOSTNAME] = "/etc/hostname\0", | |
1838 | [META_MACHINE_ID] = "/etc/machine-id\0", | |
1839 | [META_MACHINE_INFO] = "/etc/machine-info\0", | |
d4dffb85 LP |
1840 | [META_OS_RELEASE] = "/etc/os-release\0" |
1841 | "/usr/lib/os-release\0", | |
3b925504 LP |
1842 | }; |
1843 | ||
1844 | _cleanup_strv_free_ char **machine_info = NULL, **os_release = NULL; | |
af8219d5 | 1845 | _cleanup_close_pair_ int error_pipe[2] = { -1, -1 }; |
3b925504 LP |
1846 | _cleanup_(rmdir_and_freep) char *t = NULL; |
1847 | _cleanup_(sigkill_waitp) pid_t child = 0; | |
1848 | sd_id128_t machine_id = SD_ID128_NULL; | |
1849 | _cleanup_free_ char *hostname = NULL; | |
1850 | unsigned n_meta_initialized = 0, k; | |
af8219d5 LP |
1851 | int fds[2 * _META_MAX], r, v; |
1852 | ssize_t n; | |
3b925504 LP |
1853 | |
1854 | BLOCK_SIGNALS(SIGCHLD); | |
1855 | ||
1856 | assert(m); | |
1857 | ||
1858 | for (; n_meta_initialized < _META_MAX; n_meta_initialized ++) | |
1859 | if (pipe2(fds + 2*n_meta_initialized, O_CLOEXEC) < 0) { | |
1860 | r = -errno; | |
1861 | goto finish; | |
1862 | } | |
1863 | ||
1864 | r = mkdtemp_malloc("/tmp/dissect-XXXXXX", &t); | |
1865 | if (r < 0) | |
1866 | goto finish; | |
1867 | ||
af8219d5 LP |
1868 | if (pipe2(error_pipe, O_CLOEXEC) < 0) { |
1869 | r = -errno; | |
1870 | goto finish; | |
1871 | } | |
1872 | ||
e2047ba9 | 1873 | r = safe_fork("(sd-dissect)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_NEW_MOUNTNS|FORK_MOUNTNS_SLAVE, &child); |
be39f6ee | 1874 | if (r < 0) |
3b925504 | 1875 | goto finish; |
be39f6ee | 1876 | if (r == 0) { |
af8219d5 LP |
1877 | error_pipe[0] = safe_close(error_pipe[0]); |
1878 | ||
03bcb6d4 | 1879 | r = dissected_image_mount(m, t, UID_INVALID, DISSECT_IMAGE_READ_ONLY|DISSECT_IMAGE_MOUNT_ROOT_ONLY|DISSECT_IMAGE_VALIDATE_OS); |
429d4e41 | 1880 | if (r < 0) { |
af8219d5 LP |
1881 | /* Let parent know the error */ |
1882 | (void) write(error_pipe[1], &r, sizeof(r)); | |
1883 | ||
429d4e41 | 1884 | log_debug_errno(r, "Failed to mount dissected image: %m"); |
3b925504 | 1885 | _exit(EXIT_FAILURE); |
429d4e41 | 1886 | } |
3b925504 LP |
1887 | |
1888 | for (k = 0; k < _META_MAX; k++) { | |
37e44c3f | 1889 | _cleanup_close_ int fd = -ENOENT; |
3b925504 LP |
1890 | const char *p; |
1891 | ||
1892 | fds[2*k] = safe_close(fds[2*k]); | |
1893 | ||
1894 | NULSTR_FOREACH(p, paths[k]) { | |
36952d19 | 1895 | fd = chase_symlinks_and_open(p, t, CHASE_PREFIX_ROOT, O_RDONLY|O_CLOEXEC|O_NOCTTY, NULL); |
3b925504 LP |
1896 | if (fd >= 0) |
1897 | break; | |
1898 | } | |
36952d19 LP |
1899 | if (fd < 0) { |
1900 | log_debug_errno(fd, "Failed to read %s file of image, ignoring: %m", paths[k]); | |
37e44c3f | 1901 | fds[2*k+1] = safe_close(fds[2*k+1]); |
3b925504 | 1902 | continue; |
36952d19 | 1903 | } |
3b925504 LP |
1904 | |
1905 | r = copy_bytes(fd, fds[2*k+1], (uint64_t) -1, 0); | |
af8219d5 LP |
1906 | if (r < 0) { |
1907 | (void) write(error_pipe[1], &r, sizeof(r)); | |
3b925504 | 1908 | _exit(EXIT_FAILURE); |
af8219d5 | 1909 | } |
3b925504 LP |
1910 | |
1911 | fds[2*k+1] = safe_close(fds[2*k+1]); | |
1912 | } | |
1913 | ||
1914 | _exit(EXIT_SUCCESS); | |
1915 | } | |
1916 | ||
af8219d5 LP |
1917 | error_pipe[1] = safe_close(error_pipe[1]); |
1918 | ||
3b925504 LP |
1919 | for (k = 0; k < _META_MAX; k++) { |
1920 | _cleanup_fclose_ FILE *f = NULL; | |
1921 | ||
1922 | fds[2*k+1] = safe_close(fds[2*k+1]); | |
1923 | ||
4fa744a3 | 1924 | f = take_fdopen(&fds[2*k], "r"); |
3b925504 LP |
1925 | if (!f) { |
1926 | r = -errno; | |
1927 | goto finish; | |
1928 | } | |
1929 | ||
3b925504 LP |
1930 | switch (k) { |
1931 | ||
1932 | case META_HOSTNAME: | |
1933 | r = read_etc_hostname_stream(f, &hostname); | |
1934 | if (r < 0) | |
1935 | log_debug_errno(r, "Failed to read /etc/hostname: %m"); | |
1936 | ||
1937 | break; | |
1938 | ||
1939 | case META_MACHINE_ID: { | |
1940 | _cleanup_free_ char *line = NULL; | |
1941 | ||
1942 | r = read_line(f, LONG_LINE_MAX, &line); | |
1943 | if (r < 0) | |
1944 | log_debug_errno(r, "Failed to read /etc/machine-id: %m"); | |
1945 | else if (r == 33) { | |
1946 | r = sd_id128_from_string(line, &machine_id); | |
1947 | if (r < 0) | |
1948 | log_debug_errno(r, "Image contains invalid /etc/machine-id: %s", line); | |
1949 | } else if (r == 0) | |
1950 | log_debug("/etc/machine-id file is empty."); | |
1951 | else | |
1952 | log_debug("/etc/machine-id has unexpected length %i.", r); | |
1953 | ||
1954 | break; | |
1955 | } | |
1956 | ||
1957 | case META_MACHINE_INFO: | |
aa8fbc74 | 1958 | r = load_env_file_pairs(f, "machine-info", &machine_info); |
3b925504 LP |
1959 | if (r < 0) |
1960 | log_debug_errno(r, "Failed to read /etc/machine-info: %m"); | |
1961 | ||
1962 | break; | |
1963 | ||
1964 | case META_OS_RELEASE: | |
aa8fbc74 | 1965 | r = load_env_file_pairs(f, "os-release", &os_release); |
3b925504 LP |
1966 | if (r < 0) |
1967 | log_debug_errno(r, "Failed to read OS release file: %m"); | |
1968 | ||
1969 | break; | |
1970 | } | |
1971 | } | |
1972 | ||
2e87a1fd | 1973 | r = wait_for_terminate_and_check("(sd-dissect)", child, 0); |
3b925504 | 1974 | child = 0; |
2e87a1fd | 1975 | if (r < 0) |
af8219d5 LP |
1976 | return r; |
1977 | ||
1978 | n = read(error_pipe[0], &v, sizeof(v)); | |
1979 | if (n < 0) | |
1980 | return -errno; | |
1981 | if (n == sizeof(v)) | |
1982 | return v; /* propagate error sent to us from child */ | |
1983 | if (n != 0) | |
1984 | return -EIO; | |
1985 | ||
2e87a1fd LP |
1986 | if (r != EXIT_SUCCESS) |
1987 | return -EPROTO; | |
3b925504 LP |
1988 | |
1989 | free_and_replace(m->hostname, hostname); | |
1990 | m->machine_id = machine_id; | |
1991 | strv_free_and_replace(m->machine_info, machine_info); | |
1992 | strv_free_and_replace(m->os_release, os_release); | |
1993 | ||
1994 | finish: | |
1995 | for (k = 0; k < n_meta_initialized; k++) | |
1996 | safe_close_pair(fds + 2*k); | |
1997 | ||
1998 | return r; | |
1999 | } | |
2000 | ||
4526113f LP |
2001 | int dissect_image_and_warn( |
2002 | int fd, | |
2003 | const char *name, | |
89e62e0b | 2004 | const VeritySettings *verity, |
18d73705 | 2005 | const MountOptions *mount_options, |
4526113f LP |
2006 | DissectImageFlags flags, |
2007 | DissectedImage **ret) { | |
2008 | ||
2009 | _cleanup_free_ char *buffer = NULL; | |
2010 | int r; | |
2011 | ||
2012 | if (!name) { | |
2013 | r = fd_get_path(fd, &buffer); | |
2014 | if (r < 0) | |
2015 | return r; | |
2016 | ||
2017 | name = buffer; | |
2018 | } | |
2019 | ||
89e62e0b | 2020 | r = dissect_image(fd, verity, mount_options, flags, ret); |
4526113f LP |
2021 | |
2022 | switch (r) { | |
2023 | ||
2024 | case -EOPNOTSUPP: | |
2025 | return log_error_errno(r, "Dissecting images is not supported, compiled without blkid support."); | |
2026 | ||
2027 | case -ENOPKG: | |
2028 | return log_error_errno(r, "Couldn't identify a suitable partition table or file system in '%s'.", name); | |
2029 | ||
2030 | case -EADDRNOTAVAIL: | |
2031 | return log_error_errno(r, "No root partition for specified root hash found in '%s'.", name); | |
2032 | ||
2033 | case -ENOTUNIQ: | |
2034 | return log_error_errno(r, "Multiple suitable root partitions found in image '%s'.", name); | |
2035 | ||
2036 | case -ENXIO: | |
2037 | return log_error_errno(r, "No suitable root partition found in image '%s'.", name); | |
2038 | ||
2039 | case -EPROTONOSUPPORT: | |
2040 | return log_error_errno(r, "Device '%s' is loopback block device with partition scanning turned off, please turn it on.", name); | |
2041 | ||
2042 | default: | |
2043 | if (r < 0) | |
2044 | return log_error_errno(r, "Failed to dissect image '%s': %m", name); | |
2045 | ||
2046 | return r; | |
2047 | } | |
2048 | } | |
2049 | ||
569a0e42 | 2050 | bool dissected_image_can_do_verity(const DissectedImage *image, PartitionDesignator partition_designator) { |
e7cbe5cb LB |
2051 | if (image->single_file_system) |
2052 | return partition_designator == PARTITION_ROOT && image->can_verity; | |
2053 | ||
2054 | return PARTITION_VERITY_OF(partition_designator) >= 0; | |
2055 | } | |
2056 | ||
569a0e42 | 2057 | bool dissected_image_has_verity(const DissectedImage *image, PartitionDesignator partition_designator) { |
e7cbe5cb LB |
2058 | int k; |
2059 | ||
2060 | if (image->single_file_system) | |
2061 | return partition_designator == PARTITION_ROOT && image->verity; | |
2062 | ||
2063 | k = PARTITION_VERITY_OF(partition_designator); | |
2064 | return k >= 0 && image->partitions[k].found; | |
2065 | } | |
2066 | ||
18d73705 LB |
2067 | MountOptions* mount_options_free_all(MountOptions *options) { |
2068 | MountOptions *m; | |
2069 | ||
2070 | while ((m = options)) { | |
2071 | LIST_REMOVE(mount_options, options, m); | |
2072 | free(m->options); | |
2073 | free(m); | |
2074 | } | |
2075 | ||
2076 | return NULL; | |
2077 | } | |
2078 | ||
569a0e42 | 2079 | const char* mount_options_from_designator(const MountOptions *options, PartitionDesignator designator) { |
f5215bc8 | 2080 | const MountOptions *m; |
18d73705 | 2081 | |
f5215bc8 | 2082 | LIST_FOREACH(mount_options, m, options) |
9ece6444 | 2083 | if (designator == m->partition_designator && !isempty(m->options)) |
18d73705 | 2084 | return m->options; |
6aa05ebd | 2085 | |
18d73705 LB |
2086 | return NULL; |
2087 | } | |
2088 | ||
6aa05ebd LP |
2089 | int mount_image_privately_interactively( |
2090 | const char *image, | |
2091 | DissectImageFlags flags, | |
2092 | char **ret_directory, | |
2093 | LoopDevice **ret_loop_device, | |
2094 | DecryptedImage **ret_decrypted_image) { | |
2095 | ||
2096 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; | |
2097 | _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL; | |
2098 | _cleanup_(dissected_image_unrefp) DissectedImage *dissected_image = NULL; | |
2099 | _cleanup_(rmdir_and_freep) char *created_dir = NULL; | |
2100 | _cleanup_free_ char *temp = NULL; | |
2101 | int r; | |
2102 | ||
2103 | /* Mounts an OS image at a temporary place, inside a newly created mount namespace of our own. This | |
2104 | * is used by tools such as systemd-tmpfiles or systemd-firstboot to operate on some disk image | |
2105 | * easily. */ | |
2106 | ||
2107 | assert(image); | |
2108 | assert(ret_directory); | |
2109 | assert(ret_loop_device); | |
2110 | assert(ret_decrypted_image); | |
2111 | ||
2112 | r = tempfn_random_child(NULL, program_invocation_short_name, &temp); | |
2113 | if (r < 0) | |
2114 | return log_error_errno(r, "Failed to generate temporary mount directory: %m"); | |
2115 | ||
2116 | r = loop_device_make_by_path( | |
2117 | image, | |
2118 | FLAGS_SET(flags, DISSECT_IMAGE_READ_ONLY) ? O_RDONLY : O_RDWR, | |
2119 | FLAGS_SET(flags, DISSECT_IMAGE_NO_PARTITION_TABLE) ? 0 : LO_FLAGS_PARTSCAN, | |
2120 | &d); | |
2121 | if (r < 0) | |
2122 | return log_error_errno(r, "Failed to set up loopback device: %m"); | |
2123 | ||
89e62e0b | 2124 | r = dissect_image_and_warn(d->fd, image, NULL, NULL, flags, &dissected_image); |
6aa05ebd LP |
2125 | if (r < 0) |
2126 | return r; | |
2127 | ||
89e62e0b | 2128 | r = dissected_image_decrypt_interactively(dissected_image, NULL, NULL, flags, &decrypted_image); |
6aa05ebd LP |
2129 | if (r < 0) |
2130 | return r; | |
2131 | ||
2132 | r = detach_mount_namespace(); | |
2133 | if (r < 0) | |
2134 | return log_error_errno(r, "Failed to detach mount namespace: %m"); | |
2135 | ||
2136 | r = mkdir_p(temp, 0700); | |
2137 | if (r < 0) | |
2138 | return log_error_errno(r, "Failed to create mount point: %m"); | |
2139 | ||
2140 | created_dir = TAKE_PTR(temp); | |
2141 | ||
af187ab2 | 2142 | r = dissected_image_mount_and_warn(dissected_image, created_dir, UID_INVALID, flags); |
6aa05ebd | 2143 | if (r < 0) |
af187ab2 | 2144 | return r; |
6aa05ebd LP |
2145 | |
2146 | if (decrypted_image) { | |
2147 | r = decrypted_image_relinquish(decrypted_image); | |
2148 | if (r < 0) | |
2149 | return log_error_errno(r, "Failed to relinquish DM devices: %m"); | |
2150 | } | |
2151 | ||
2152 | loop_device_relinquish(d); | |
2153 | ||
2154 | *ret_directory = TAKE_PTR(created_dir); | |
2155 | *ret_loop_device = TAKE_PTR(d); | |
2156 | *ret_decrypted_image = TAKE_PTR(decrypted_image); | |
2157 | ||
2158 | return 0; | |
2159 | } | |
2160 | ||
8c1be37e LP |
2161 | static const char *const partition_designator_table[] = { |
2162 | [PARTITION_ROOT] = "root", | |
2163 | [PARTITION_ROOT_SECONDARY] = "root-secondary", | |
2164 | [PARTITION_HOME] = "home", | |
2165 | [PARTITION_SRV] = "srv", | |
2166 | [PARTITION_ESP] = "esp", | |
a8c47660 | 2167 | [PARTITION_XBOOTLDR] = "xbootldr", |
8c1be37e | 2168 | [PARTITION_SWAP] = "swap", |
4623e8e6 LP |
2169 | [PARTITION_ROOT_VERITY] = "root-verity", |
2170 | [PARTITION_ROOT_SECONDARY_VERITY] = "root-secondary-verity", | |
d4dffb85 LP |
2171 | [PARTITION_TMP] = "tmp", |
2172 | [PARTITION_VAR] = "var", | |
8c1be37e LP |
2173 | }; |
2174 | ||
569a0e42 | 2175 | DEFINE_STRING_TABLE_LOOKUP(partition_designator, PartitionDesignator); |