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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
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 | |
c2fa92e7 LP |
14 | #if HAVE_OPENSSL |
15 | #include <openssl/err.h> | |
16 | #include <openssl/pem.h> | |
17 | #include <openssl/x509.h> | |
18 | #endif | |
19 | ||
3c1f2cee | 20 | #include "sd-device.h" |
dccca82b LP |
21 | #include "sd-id128.h" |
22 | ||
8c1be37e | 23 | #include "architecture.h" |
18b5886e | 24 | #include "ask-password-api.h" |
8c1be37e | 25 | #include "blkid-util.h" |
18c528e9 | 26 | #include "blockdev-util.h" |
f4351959 | 27 | #include "chase-symlinks.h" |
c2fa92e7 | 28 | #include "conf-files.h" |
3b925504 | 29 | #include "copy.h" |
1e2f3230 | 30 | #include "cryptsetup-util.h" |
3b925504 | 31 | #include "def.h" |
553e15f2 | 32 | #include "device-nodes.h" |
8437c059 | 33 | #include "device-util.h" |
7718ac97 | 34 | #include "discover-image.h" |
8c1be37e | 35 | #include "dissect-image.h" |
a709a315 | 36 | #include "dm-util.h" |
686d13b9 | 37 | #include "env-file.h" |
88b3300f | 38 | #include "env-util.h" |
93f59701 | 39 | #include "extension-release.h" |
18b5886e | 40 | #include "fd-util.h" |
78ebe980 | 41 | #include "fileio.h" |
2eedfd2d | 42 | #include "fs-util.h" |
cf32c486 | 43 | #include "fsck-util.h" |
8c1be37e | 44 | #include "gpt.h" |
78ebe980 | 45 | #include "hexdecoct.h" |
e2054217 | 46 | #include "hostname-setup.h" |
3b925504 | 47 | #include "id128-util.h" |
593fe6c0 | 48 | #include "import-util.h" |
a4e0d617 | 49 | #include "io-util.h" |
35cd0ba5 | 50 | #include "mkdir-label.h" |
8c1be37e | 51 | #include "mount-util.h" |
e4de7287 | 52 | #include "mountpoint-util.h" |
6aa05ebd | 53 | #include "namespace-util.h" |
d8b4d14d | 54 | #include "nulstr-util.h" |
c2fa92e7 | 55 | #include "openssl-util.h" |
d58ad743 | 56 | #include "os-util.h" |
8c1be37e | 57 | #include "path-util.h" |
3b925504 LP |
58 | #include "process-util.h" |
59 | #include "raw-clone.h" | |
81939d9d | 60 | #include "resize-fs.h" |
3b925504 | 61 | #include "signal-util.h" |
8c1be37e | 62 | #include "stat-util.h" |
18b5886e | 63 | #include "stdio-util.h" |
8c1be37e LP |
64 | #include "string-table.h" |
65 | #include "string-util.h" | |
2eedfd2d | 66 | #include "strv.h" |
e4de7287 | 67 | #include "tmpfile-util.h" |
a8040b6d | 68 | #include "udev-util.h" |
2d3a5a73 | 69 | #include "user-util.h" |
41488e1f | 70 | #include "xattr-util.h" |
8c1be37e | 71 | |
28e2641a FF |
72 | /* how many times to wait for the device nodes to appear */ |
73 | #define N_DEVICE_NODE_LIST_ATTEMPTS 10 | |
74 | ||
c34b75a1 | 75 | int probe_filesystem(const char *node, char **ret_fstype) { |
7cc84b2c | 76 | /* Try to find device content type and return it in *ret_fstype. If nothing is found, |
5238e957 | 77 | * 0/NULL will be returned. -EUCLEAN will be returned for ambiguous results, and an |
7cc84b2c ZJS |
78 | * different error otherwise. */ |
79 | ||
349cc4a5 | 80 | #if HAVE_BLKID |
8e766630 | 81 | _cleanup_(blkid_free_probep) blkid_probe b = NULL; |
18b5886e LP |
82 | const char *fstype; |
83 | int r; | |
84 | ||
995fa2e5 | 85 | errno = 0; |
18b5886e LP |
86 | b = blkid_new_probe_from_filename(node); |
87 | if (!b) | |
66855de7 | 88 | return errno_or_else(ENOMEM); |
18b5886e LP |
89 | |
90 | blkid_probe_enable_superblocks(b, 1); | |
91 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE); | |
92 | ||
93 | errno = 0; | |
94 | r = blkid_do_safeprobe(b); | |
7cc84b2c ZJS |
95 | if (r == 1) { |
96 | log_debug("No type detected on partition %s", node); | |
18b5886e LP |
97 | goto not_found; |
98 | } | |
58dfbfbd LP |
99 | if (r == -2) |
100 | return log_debug_errno(SYNTHETIC_ERRNO(EUCLEAN), | |
101 | "Results ambiguous for partition %s", node); | |
b382db9f | 102 | if (r != 0) |
66855de7 | 103 | return errno_or_else(EIO); |
18b5886e LP |
104 | |
105 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
106 | ||
107 | if (fstype) { | |
108 | char *t; | |
109 | ||
110 | t = strdup(fstype); | |
111 | if (!t) | |
112 | return -ENOMEM; | |
113 | ||
114 | *ret_fstype = t; | |
115 | return 1; | |
116 | } | |
117 | ||
118 | not_found: | |
119 | *ret_fstype = NULL; | |
120 | return 0; | |
d1c536f5 ZJS |
121 | #else |
122 | return -EOPNOTSUPP; | |
a75e27eb | 123 | #endif |
d1c536f5 | 124 | } |
18b5886e | 125 | |
40c10d3f | 126 | #if HAVE_BLKID |
4ba86848 LP |
127 | static int enumerator_for_parent(sd_device *d, sd_device_enumerator **ret) { |
128 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
129 | int r; | |
aae22eb3 | 130 | |
f70e7f70 | 131 | assert(d); |
4ba86848 | 132 | assert(ret); |
f70e7f70 | 133 | |
4ba86848 LP |
134 | r = sd_device_enumerator_new(&e); |
135 | if (r < 0) | |
136 | return r; | |
3c1f2cee | 137 | |
210e1cd6 YW |
138 | r = sd_device_enumerator_add_match_subsystem(e, "block", true); |
139 | if (r < 0) | |
140 | return r; | |
141 | ||
4ba86848 LP |
142 | r = sd_device_enumerator_add_match_parent(e, d); |
143 | if (r < 0) | |
144 | return r; | |
145 | ||
210e1cd6 YW |
146 | r = sd_device_enumerator_add_match_sysattr(e, "partition", NULL, true); |
147 | if (r < 0) | |
148 | return r; | |
149 | ||
4ba86848 LP |
150 | *ret = TAKE_PTR(e); |
151 | return 0; | |
cde942f6 JPRV |
152 | } |
153 | ||
c1737506 LP |
154 | static int device_is_partition( |
155 | sd_device *d, | |
156 | sd_device *expected_parent, | |
157 | blkid_partition pp) { | |
158 | ||
0a8f9bc6 | 159 | const char *v, *parent_syspath, *expected_parent_syspath; |
4ba86848 LP |
160 | blkid_loff_t bsize, bstart; |
161 | uint64_t size, start; | |
162 | int partno, bpartno, r; | |
0a8f9bc6 | 163 | sd_device *parent; |
aae22eb3 | 164 | |
f70e7f70 | 165 | assert(d); |
0a8f9bc6 | 166 | assert(expected_parent); |
4ba86848 | 167 | assert(pp); |
f70e7f70 | 168 | |
11368b69 | 169 | r = sd_device_get_subsystem(d, &v); |
4ba86848 LP |
170 | if (r < 0) |
171 | return r; | |
11368b69 YW |
172 | if (!streq(v, "block")) |
173 | return false; | |
174 | ||
175 | if (sd_device_get_devtype(d, &v) < 0 || !streq(v, "partition")) | |
aae22eb3 LP |
176 | return false; |
177 | ||
0a8f9bc6 YW |
178 | r = sd_device_get_parent(d, &parent); |
179 | if (r < 0) | |
180 | return false; /* Doesn't have a parent? No relevant to us */ | |
181 | ||
182 | r = sd_device_get_syspath(parent, &parent_syspath); /* Check parent of device of this action */ | |
183 | if (r < 0) | |
184 | return r; | |
185 | ||
186 | r = sd_device_get_syspath(expected_parent, &expected_parent_syspath); /* Check parent of device we are looking for */ | |
187 | if (r < 0) | |
188 | return r; | |
189 | ||
190 | if (!path_equal(parent_syspath, expected_parent_syspath)) | |
191 | return false; /* Has a different parent than what we need, not interesting to us */ | |
192 | ||
7d25c246 LP |
193 | /* On kernel uevents we may find the partition number in the PARTN= field. Let's use that preferably, |
194 | * since it's cheaper and more importantly: the sysfs attribute "partition" appears to become | |
c1737506 LP |
195 | * available late, hence let's use the property instead, which is available at the moment we see the |
196 | * uevent. */ | |
197 | r = sd_device_get_property_value(d, "PARTN", &v); | |
198 | if (r == -ENOENT) | |
199 | r = sd_device_get_sysattr_value(d, "partition", &v); | |
4ba86848 LP |
200 | if (r < 0) |
201 | return r; | |
c1737506 | 202 | |
4ba86848 LP |
203 | r = safe_atoi(v, &partno); |
204 | if (r < 0) | |
205 | return r; | |
ea887be0 | 206 | |
4ba86848 LP |
207 | errno = 0; |
208 | bpartno = blkid_partition_get_partno(pp); | |
209 | if (bpartno < 0) | |
210 | return errno_or_else(EIO); | |
ea887be0 | 211 | |
4ba86848 LP |
212 | if (partno != bpartno) |
213 | return false; | |
f70e7f70 | 214 | |
4ba86848 | 215 | r = sd_device_get_sysattr_value(d, "start", &v); |
ea887be0 ZJS |
216 | if (r < 0) |
217 | return r; | |
4ba86848 | 218 | r = safe_atou64(v, &start); |
ea887be0 ZJS |
219 | if (r < 0) |
220 | return r; | |
221 | ||
4ba86848 LP |
222 | errno = 0; |
223 | bstart = blkid_partition_get_start(pp); | |
224 | if (bstart < 0) | |
225 | return errno_or_else(EIO); | |
226 | ||
227 | if (start != (uint64_t) bstart) | |
228 | return false; | |
229 | ||
230 | r = sd_device_get_sysattr_value(d, "size", &v); | |
231 | if (r < 0) | |
232 | return r; | |
233 | r = safe_atou64(v, &size); | |
ea887be0 ZJS |
234 | if (r < 0) |
235 | return r; | |
236 | ||
4ba86848 LP |
237 | errno = 0; |
238 | bsize = blkid_partition_get_size(pp); | |
239 | if (bsize < 0) | |
240 | return errno_or_else(EIO); | |
241 | ||
242 | if (size != (uint64_t) bsize) | |
243 | return false; | |
244 | ||
245 | return true; | |
ea887be0 ZJS |
246 | } |
247 | ||
4ba86848 LP |
248 | static int find_partition( |
249 | sd_device *parent, | |
250 | blkid_partition pp, | |
4a62257d | 251 | usec_t timestamp_not_before, |
3fe398ce | 252 | DissectImageFlags flags, |
4ba86848 | 253 | sd_device **ret) { |
ea887be0 ZJS |
254 | |
255 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
256 | sd_device *q; | |
ea887be0 ZJS |
257 | int r; |
258 | ||
4ba86848 LP |
259 | assert(parent); |
260 | assert(pp); | |
261 | assert(ret); | |
f70e7f70 | 262 | |
4ba86848 | 263 | r = enumerator_for_parent(parent, &e); |
ea887be0 ZJS |
264 | if (r < 0) |
265 | return r; | |
266 | ||
ea887be0 | 267 | FOREACH_DEVICE(e, q) { |
4a62257d LP |
268 | uint64_t usec; |
269 | ||
3fe398ce LP |
270 | if (!FLAGS_SET(flags, DISSECT_IMAGE_NO_UDEV)) { |
271 | r = sd_device_get_usec_initialized(q, &usec); | |
272 | if (r == -EBUSY) /* Not initialized yet */ | |
273 | continue; | |
274 | if (r < 0) | |
275 | return r; | |
4a62257d | 276 | |
3fe398ce LP |
277 | if (timestamp_not_before != USEC_INFINITY && |
278 | usec < timestamp_not_before) /* udev database entry older than our attachment? Then it's not ours */ | |
279 | continue; | |
280 | } | |
4a62257d | 281 | |
0a8f9bc6 | 282 | r = device_is_partition(q, parent, pp); |
4ba86848 LP |
283 | if (r < 0) |
284 | return r; | |
285 | if (r > 0) { | |
286 | *ret = sd_device_ref(q); | |
287 | return 0; | |
052eaf5c | 288 | } |
ea887be0 ZJS |
289 | } |
290 | ||
4ba86848 LP |
291 | return -ENXIO; |
292 | } | |
10c1b188 | 293 | |
4ba86848 LP |
294 | struct wait_data { |
295 | sd_device *parent_device; | |
296 | blkid_partition blkidp; | |
297 | sd_device *found; | |
a3642997 | 298 | uint64_t diskseq; |
75dc190d | 299 | uint64_t uevent_seqnum_not_before; |
05c3c620 YW |
300 | usec_t timestamp_not_before; |
301 | DissectImageFlags flags; | |
4ba86848 | 302 | }; |
ea887be0 | 303 | |
4ba86848 LP |
304 | static inline void wait_data_done(struct wait_data *d) { |
305 | sd_device_unref(d->found); | |
306 | } | |
ea887be0 | 307 | |
4ba86848 | 308 | static int device_monitor_handler(sd_device_monitor *monitor, sd_device *device, void *userdata) { |
4ba86848 | 309 | struct wait_data *w = userdata; |
4ba86848 LP |
310 | int r; |
311 | ||
312 | assert(w); | |
313 | ||
a1130022 | 314 | if (device_for_action(device, SD_DEVICE_REMOVE)) |
4ba86848 LP |
315 | return 0; |
316 | ||
a3642997 LB |
317 | if (w->diskseq != 0) { |
318 | uint64_t diskseq; | |
319 | ||
320 | /* If w->diskseq is non-zero, then we must have a disk seqnum */ | |
321 | r = sd_device_get_diskseq(device, &diskseq); | |
322 | if (r < 0) { | |
323 | log_debug_errno(r, "Dropping event because it has no diskseq, but waiting for %" PRIu64, w->diskseq); | |
324 | return 0; | |
325 | } | |
326 | if (diskseq < w->diskseq) { | |
327 | log_debug("Dropping event because diskseq too old (%" PRIu64 " < %" PRIu64 ")", | |
328 | diskseq, w->diskseq); | |
329 | return 0; | |
330 | } | |
331 | if (diskseq > w->diskseq) { | |
332 | r = -EBUSY; | |
333 | goto finish; /* Newer than what we were expecting, so we missed it, stop waiting */ | |
334 | } | |
335 | } else if (w->uevent_seqnum_not_before != UINT64_MAX) { | |
75dc190d LP |
336 | uint64_t seqnum; |
337 | ||
338 | r = sd_device_get_seqnum(device, &seqnum); | |
339 | if (r < 0) | |
340 | goto finish; | |
341 | ||
342 | if (seqnum <= w->uevent_seqnum_not_before) { /* From an older use of this loop device */ | |
343 | log_debug("Dropping event because seqnum too old (%" PRIu64 " <= %" PRIu64 ")", | |
344 | seqnum, w->uevent_seqnum_not_before); | |
345 | return 0; | |
346 | } | |
347 | } | |
348 | ||
0a8f9bc6 | 349 | r = device_is_partition(device, w->parent_device, w->blkidp); |
4ba86848 LP |
350 | if (r < 0) |
351 | goto finish; | |
352 | if (r == 0) /* Not the one we need */ | |
353 | return 0; | |
354 | ||
355 | /* It's the one we need! Yay! */ | |
356 | assert(!w->found); | |
357 | w->found = sd_device_ref(device); | |
358 | r = 0; | |
359 | ||
360 | finish: | |
361 | return sd_event_exit(sd_device_monitor_get_event(monitor), r); | |
ea887be0 ZJS |
362 | } |
363 | ||
05c3c620 YW |
364 | static int timeout_handler(sd_event_source *s, uint64_t usec, void *userdata) { |
365 | struct wait_data *w = userdata; | |
366 | int r; | |
367 | ||
368 | assert(w); | |
369 | ||
370 | /* Why partition not appeared within the timeout? We may lost some uevent, as some properties | |
371 | * were not ready when we received uevent... Not sure, but anyway, let's try to find the | |
372 | * partition again before give up. */ | |
373 | ||
374 | r = find_partition(w->parent_device, w->blkidp, w->timestamp_not_before, w->flags, &w->found); | |
375 | if (r == -ENXIO) | |
376 | return log_debug_errno(SYNTHETIC_ERRNO(ETIMEDOUT), | |
377 | "Partition still not appeared after timeout reached."); | |
378 | if (r < 0) | |
379 | return log_debug_errno(r, "Failed to find partition: %m"); | |
380 | ||
381 | log_debug("Partition appeared after timeout reached."); | |
382 | return sd_event_exit(sd_event_source_get_event(s), 0); | |
383 | } | |
384 | ||
61730746 YW |
385 | static int retry_handler(sd_event_source *s, uint64_t usec, void *userdata) { |
386 | struct wait_data *w = userdata; | |
387 | int r; | |
388 | ||
389 | assert(w); | |
390 | ||
391 | r = find_partition(w->parent_device, w->blkidp, w->timestamp_not_before, w->flags, &w->found); | |
392 | if (r != -ENXIO) { | |
393 | if (r < 0) | |
394 | return log_debug_errno(r, "Failed to find partition: %m"); | |
395 | ||
396 | log_debug("Partition found by a periodic search."); | |
397 | return sd_event_exit(sd_event_source_get_event(s), 0); | |
398 | } | |
399 | ||
400 | r = sd_event_source_set_time_relative(s, 500 * USEC_PER_MSEC); | |
401 | if (r < 0) | |
402 | return r; | |
403 | ||
404 | return sd_event_source_set_enabled(s, SD_EVENT_ONESHOT); | |
405 | } | |
406 | ||
4ba86848 LP |
407 | static int wait_for_partition_device( |
408 | sd_device *parent, | |
409 | blkid_partition pp, | |
410 | usec_t deadline, | |
a3642997 | 411 | uint64_t diskseq, |
75dc190d | 412 | uint64_t uevent_seqnum_not_before, |
4a62257d | 413 | usec_t timestamp_not_before, |
3fe398ce | 414 | DissectImageFlags flags, |
4ba86848 LP |
415 | sd_device **ret) { |
416 | ||
61730746 | 417 | _cleanup_(sd_event_source_unrefp) sd_event_source *timeout_source = NULL, *retry_source = NULL; |
4ba86848 LP |
418 | _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor = NULL; |
419 | _cleanup_(sd_event_unrefp) sd_event *event = NULL; | |
ea887be0 ZJS |
420 | int r; |
421 | ||
4ba86848 LP |
422 | assert(parent); |
423 | assert(pp); | |
424 | assert(ret); | |
425 | ||
3fe398ce | 426 | r = find_partition(parent, pp, timestamp_not_before, flags, ret); |
4ba86848 LP |
427 | if (r != -ENXIO) |
428 | return r; | |
429 | ||
430 | r = sd_event_new(&event); | |
431 | if (r < 0) | |
432 | return r; | |
433 | ||
434 | r = sd_device_monitor_new(&monitor); | |
435 | if (r < 0) | |
436 | return r; | |
437 | ||
438 | r = sd_device_monitor_filter_add_match_subsystem_devtype(monitor, "block", "partition"); | |
439 | if (r < 0) | |
440 | return r; | |
441 | ||
210e1cd6 YW |
442 | r = sd_device_monitor_filter_add_match_parent(monitor, parent, true); |
443 | if (r < 0) | |
444 | return r; | |
445 | ||
446 | r = sd_device_monitor_filter_add_match_sysattr(monitor, "partition", NULL, true); | |
447 | if (r < 0) | |
448 | return r; | |
449 | ||
4ba86848 LP |
450 | r = sd_device_monitor_attach_event(monitor, event); |
451 | if (r < 0) | |
452 | return r; | |
453 | ||
454 | _cleanup_(wait_data_done) struct wait_data w = { | |
455 | .parent_device = parent, | |
456 | .blkidp = pp, | |
a3642997 | 457 | .diskseq = diskseq, |
75dc190d | 458 | .uevent_seqnum_not_before = uevent_seqnum_not_before, |
05c3c620 YW |
459 | .timestamp_not_before = timestamp_not_before, |
460 | .flags = flags, | |
4ba86848 | 461 | }; |
f70e7f70 | 462 | |
4ba86848 LP |
463 | r = sd_device_monitor_start(monitor, device_monitor_handler, &w); |
464 | if (r < 0) | |
465 | return r; | |
a8040b6d | 466 | |
4ba86848 | 467 | /* Check again, the partition might have appeared in the meantime */ |
3fe398ce | 468 | r = find_partition(parent, pp, timestamp_not_before, flags, ret); |
4ba86848 LP |
469 | if (r != -ENXIO) |
470 | return r; | |
471 | ||
472 | if (deadline != USEC_INFINITY) { | |
473 | r = sd_event_add_time( | |
474 | event, &timeout_source, | |
475 | CLOCK_MONOTONIC, deadline, 0, | |
05c3c620 YW |
476 | timeout_handler, &w); |
477 | if (r < 0) | |
478 | return r; | |
479 | ||
480 | r = sd_event_source_set_exit_on_failure(timeout_source, true); | |
4ba86848 | 481 | if (r < 0) |
ea887be0 ZJS |
482 | return r; |
483 | } | |
484 | ||
a3642997 LB |
485 | /* If we don't have a disk sequence number then we cannot do exact matching, |
486 | * and we cannot know if we missed it or if it has not been sent yet, so set | |
487 | * up additional retries to increase the chances of receiving the event. */ | |
488 | if (diskseq == 0) { | |
489 | r = sd_event_add_time_relative( | |
490 | event, &retry_source, | |
491 | CLOCK_MONOTONIC, 500 * USEC_PER_MSEC, 0, | |
492 | retry_handler, &w); | |
493 | if (r < 0) | |
494 | return r; | |
61730746 | 495 | |
a3642997 LB |
496 | r = sd_event_source_set_exit_on_failure(retry_source, true); |
497 | if (r < 0) | |
498 | return r; | |
499 | } | |
61730746 | 500 | |
4ba86848 LP |
501 | r = sd_event_loop(event); |
502 | if (r < 0) | |
503 | return r; | |
504 | ||
505 | assert(w.found); | |
506 | *ret = TAKE_PTR(w.found); | |
507 | return 0; | |
ea887be0 ZJS |
508 | } |
509 | ||
0f7c9a3d LP |
510 | static void check_partition_flags( |
511 | const char *node, | |
512 | unsigned long long pflags, | |
513 | unsigned long long supported) { | |
514 | ||
515 | assert(node); | |
516 | ||
517 | /* Mask away all flags supported by this partition's type and the three flags the UEFI spec defines generically */ | |
518 | pflags &= ~(supported | GPT_FLAG_REQUIRED_PARTITION | GPT_FLAG_NO_BLOCK_IO_PROTOCOL | GPT_FLAG_LEGACY_BIOS_BOOTABLE); | |
519 | ||
520 | if (pflags == 0) | |
521 | return; | |
522 | ||
523 | /* If there are other bits set, then log about it, to make things discoverable */ | |
524 | for (unsigned i = 0; i < sizeof(pflags) * 8; i++) { | |
525 | unsigned long long bit = 1ULL << i; | |
526 | if (!FLAGS_SET(pflags, bit)) | |
527 | continue; | |
528 | ||
529 | log_debug("Unexpected partition flag %llu set on %s!", bit, node); | |
530 | } | |
531 | } | |
532 | ||
786e3a52 LP |
533 | static int device_wait_for_initialization_harder( |
534 | sd_device *device, | |
535 | const char *subsystem, | |
536 | usec_t deadline, | |
537 | sd_device **ret) { | |
538 | ||
786e3a52 LP |
539 | usec_t start, left, retrigger_timeout; |
540 | int r; | |
541 | ||
542 | start = now(CLOCK_MONOTONIC); | |
543 | left = usec_sub_unsigned(deadline, start); | |
544 | ||
545 | if (DEBUG_LOGGING) { | |
786e3a52 LP |
546 | const char *sn = NULL; |
547 | ||
548 | (void) sd_device_get_sysname(device, &sn); | |
b64c4ece | 549 | log_device_debug(device, |
cc7ac73d | 550 | "Will wait up to %s for '%s' to initialize…", FORMAT_TIMESPAN(left, 0), strna(sn)); |
786e3a52 LP |
551 | } |
552 | ||
553 | if (left != USEC_INFINITY) | |
554 | retrigger_timeout = CLAMP(left / 4, 1 * USEC_PER_SEC, 5 * USEC_PER_SEC); /* A fourth of the total timeout, but let's clamp to 1s…5s range */ | |
555 | else | |
556 | retrigger_timeout = 2 * USEC_PER_SEC; | |
557 | ||
558 | for (;;) { | |
559 | usec_t local_deadline, n; | |
560 | bool last_try; | |
561 | ||
562 | n = now(CLOCK_MONOTONIC); | |
563 | assert(n >= start); | |
564 | ||
565 | /* Find next deadline, when we'll retrigger */ | |
566 | local_deadline = start + | |
567 | DIV_ROUND_UP(n - start, retrigger_timeout) * retrigger_timeout; | |
568 | ||
569 | if (deadline != USEC_INFINITY && deadline <= local_deadline) { | |
570 | local_deadline = deadline; | |
571 | last_try = true; | |
572 | } else | |
573 | last_try = false; | |
574 | ||
575 | r = device_wait_for_initialization(device, subsystem, local_deadline, ret); | |
576 | if (r >= 0 && DEBUG_LOGGING) { | |
786e3a52 LP |
577 | const char *sn = NULL; |
578 | ||
579 | (void) sd_device_get_sysname(device, &sn); | |
b64c4ece LP |
580 | log_device_debug(device, |
581 | "Successfully waited for device '%s' to initialize for %s.", | |
582 | strna(sn), | |
5291f26d | 583 | FORMAT_TIMESPAN(usec_sub_unsigned(now(CLOCK_MONOTONIC), start), 0)); |
786e3a52 LP |
584 | |
585 | } | |
586 | if (r != -ETIMEDOUT || last_try) | |
587 | return r; | |
588 | ||
5291f26d | 589 | if (DEBUG_LOGGING) |
b64c4ece LP |
590 | log_device_debug(device, |
591 | "Device didn't initialize within %s, assuming lost event. Retriggering device.", | |
5291f26d | 592 | FORMAT_TIMESPAN(usec_sub_unsigned(now(CLOCK_MONOTONIC), start), 0)); |
786e3a52 | 593 | |
b64c4ece | 594 | r = sd_device_trigger(device, SD_DEVICE_CHANGE); |
786e3a52 LP |
595 | if (r < 0) |
596 | return r; | |
597 | } | |
598 | } | |
40c10d3f | 599 | #endif |
aae22eb3 | 600 | |
4ba86848 LP |
601 | #define DEVICE_TIMEOUT_USEC (45 * USEC_PER_SEC) |
602 | ||
08fe0a53 LP |
603 | static void dissected_partition_done(DissectedPartition *p) { |
604 | assert(p); | |
605 | ||
606 | free(p->fstype); | |
607 | free(p->node); | |
608 | free(p->label); | |
609 | free(p->decrypted_fstype); | |
610 | free(p->decrypted_node); | |
611 | free(p->mount_options); | |
612 | ||
613 | *p = (DissectedPartition) { | |
614 | .partno = -1, | |
615 | .architecture = -1 | |
616 | }; | |
617 | } | |
618 | ||
4526113f LP |
619 | int dissect_image( |
620 | int fd, | |
89e62e0b | 621 | const VeritySettings *verity, |
18d73705 | 622 | const MountOptions *mount_options, |
a3642997 | 623 | uint64_t diskseq, |
75dc190d | 624 | uint64_t uevent_seqnum_not_before, |
4a62257d | 625 | usec_t timestamp_not_before, |
4526113f LP |
626 | DissectImageFlags flags, |
627 | DissectedImage **ret) { | |
8c1be37e | 628 | |
349cc4a5 | 629 | #if HAVE_BLKID |
62ea0ed0 LP |
630 | #ifdef GPT_ROOT_NATIVE |
631 | sd_id128_t root_uuid = SD_ID128_NULL, root_verity_uuid = SD_ID128_NULL; | |
632 | #endif | |
633 | #ifdef GPT_USR_NATIVE | |
634 | sd_id128_t usr_uuid = SD_ID128_NULL, usr_verity_uuid = SD_ID128_NULL; | |
635 | #endif | |
1f8fb21c | 636 | bool is_gpt, is_mbr, multiple_generic = false, |
de98f631 LP |
637 | generic_rw = false, /* initialize to appease gcc */ |
638 | generic_growfs = false; | |
3c1f2cee | 639 | _cleanup_(sd_device_unrefp) sd_device *d = NULL; |
8c1be37e | 640 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; |
8e766630 | 641 | _cleanup_(blkid_free_probep) blkid_probe b = NULL; |
8c1be37e | 642 | _cleanup_free_ char *generic_node = NULL; |
be30ad41 | 643 | sd_id128_t generic_uuid = SD_ID128_NULL; |
593fe6c0 | 644 | const char *pttype = NULL, *sysname = NULL; |
8c1be37e | 645 | blkid_partlist pl; |
1f8fb21c | 646 | int r, generic_nr = -1, n_partitions; |
8c1be37e | 647 | struct stat st; |
4ba86848 | 648 | usec_t deadline; |
8c1be37e LP |
649 | |
650 | assert(fd >= 0); | |
651 | assert(ret); | |
a0bff7ea | 652 | assert(!verity || verity->designator < 0 || IN_SET(verity->designator, PARTITION_ROOT, PARTITION_USR)); |
89e62e0b | 653 | assert(!verity || verity->root_hash || verity->root_hash_size == 0); |
a0bff7ea LP |
654 | assert(!verity || verity->root_hash_sig || verity->root_hash_sig_size == 0); |
655 | assert(!verity || (verity->root_hash || !verity->root_hash_sig)); | |
e7cbe5cb | 656 | assert(!((flags & DISSECT_IMAGE_GPT_ONLY) && (flags & DISSECT_IMAGE_NO_PARTITION_TABLE))); |
8c1be37e LP |
657 | |
658 | /* Probes a disk image, and returns information about what it found in *ret. | |
659 | * | |
4623e8e6 | 660 | * Returns -ENOPKG if no suitable partition table or file system could be found. |
2679f407 LP |
661 | * Returns -EADDRNOTAVAIL if a root hash was specified but no matching root/verity partitions found. |
662 | * Returns -ENXIO if we couldn't find any partition suitable as root or /usr partition | |
663 | * Returns -ENOTUNIQ if we only found multiple generic partitions and thus don't know what to do with that */ | |
4623e8e6 | 664 | |
89e62e0b | 665 | if (verity && verity->root_hash) { |
aee36b4e LP |
666 | sd_id128_t fsuuid, vuuid; |
667 | ||
668 | /* If a root hash is supplied, then we use the root partition that has a UUID that match the | |
669 | * first 128bit of the root hash. And we use the verity partition that has a UUID that match | |
670 | * the final 128bit. */ | |
4623e8e6 | 671 | |
89e62e0b | 672 | if (verity->root_hash_size < sizeof(sd_id128_t)) |
4623e8e6 LP |
673 | return -EINVAL; |
674 | ||
aee36b4e LP |
675 | memcpy(&fsuuid, verity->root_hash, sizeof(sd_id128_t)); |
676 | memcpy(&vuuid, (const uint8_t*) verity->root_hash + verity->root_hash_size - sizeof(sd_id128_t), sizeof(sd_id128_t)); | |
4623e8e6 | 677 | |
aee36b4e | 678 | if (sd_id128_is_null(fsuuid)) |
4623e8e6 | 679 | return -EINVAL; |
aee36b4e | 680 | if (sd_id128_is_null(vuuid)) |
4623e8e6 | 681 | return -EINVAL; |
aee36b4e LP |
682 | |
683 | /* If the verity data declares it's for the /usr partition, then search for that, in all | |
684 | * other cases assume it's for the root partition. */ | |
62ea0ed0 | 685 | #ifdef GPT_USR_NATIVE |
aee36b4e LP |
686 | if (verity->designator == PARTITION_USR) { |
687 | usr_uuid = fsuuid; | |
688 | usr_verity_uuid = vuuid; | |
689 | } else { | |
62ea0ed0 LP |
690 | #endif |
691 | #ifdef GPT_ROOT_NATIVE | |
aee36b4e LP |
692 | root_uuid = fsuuid; |
693 | root_verity_uuid = vuuid; | |
62ea0ed0 LP |
694 | #endif |
695 | #ifdef GPT_USR_NATIVE | |
aee36b4e | 696 | } |
62ea0ed0 | 697 | #endif |
4623e8e6 | 698 | } |
8c1be37e LP |
699 | |
700 | if (fstat(fd, &st) < 0) | |
701 | return -errno; | |
702 | ||
703 | if (!S_ISBLK(st.st_mode)) | |
704 | return -ENOTBLK; | |
705 | ||
930aa88f | 706 | r = sd_device_new_from_stat_rdev(&d, &st); |
6c544d14 LP |
707 | if (r < 0) |
708 | return r; | |
709 | ||
710 | if (!FLAGS_SET(flags, DISSECT_IMAGE_NO_UDEV)) { | |
711 | _cleanup_(sd_device_unrefp) sd_device *initialized = NULL; | |
712 | ||
713 | /* If udev support is enabled, then let's wait for the device to be initialized before we doing anything. */ | |
714 | ||
786e3a52 LP |
715 | r = device_wait_for_initialization_harder( |
716 | d, | |
717 | "block", | |
718 | usec_add(now(CLOCK_MONOTONIC), DEVICE_TIMEOUT_USEC), | |
719 | &initialized); | |
6c544d14 LP |
720 | if (r < 0) |
721 | return r; | |
722 | ||
723 | sd_device_unref(d); | |
724 | d = TAKE_PTR(initialized); | |
725 | } | |
726 | ||
8c1be37e LP |
727 | b = blkid_new_probe(); |
728 | if (!b) | |
729 | return -ENOMEM; | |
730 | ||
731 | errno = 0; | |
732 | r = blkid_probe_set_device(b, fd, 0, 0); | |
b382db9f | 733 | if (r != 0) |
66855de7 | 734 | return errno_or_else(ENOMEM); |
8c1be37e | 735 | |
9b6deb03 LP |
736 | if ((flags & DISSECT_IMAGE_GPT_ONLY) == 0) { |
737 | /* Look for file system superblocks, unless we only shall look for GPT partition tables */ | |
738 | blkid_probe_enable_superblocks(b, 1); | |
739 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE|BLKID_SUBLKS_USAGE); | |
740 | } | |
741 | ||
8c1be37e LP |
742 | blkid_probe_enable_partitions(b, 1); |
743 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
744 | ||
745 | errno = 0; | |
746 | r = blkid_do_safeprobe(b); | |
59ba6d0c LP |
747 | if (IN_SET(r, -2, 1)) |
748 | return log_debug_errno(SYNTHETIC_ERRNO(ENOPKG), "Failed to identify any partition table."); | |
b382db9f | 749 | if (r != 0) |
66855de7 | 750 | return errno_or_else(EIO); |
8c1be37e | 751 | |
a4e0d617 | 752 | m = new(DissectedImage, 1); |
8c1be37e LP |
753 | if (!m) |
754 | return -ENOMEM; | |
755 | ||
a4e0d617 LP |
756 | *m = (DissectedImage) { |
757 | .has_init_system = -1, | |
758 | }; | |
759 | ||
593fe6c0 LB |
760 | r = sd_device_get_sysname(d, &sysname); |
761 | if (r < 0) | |
762 | return log_debug_errno(r, "Failed to get device sysname: %m"); | |
763 | if (startswith(sysname, "loop")) { | |
764 | _cleanup_free_ char *name_stripped = NULL; | |
765 | const char *full_path; | |
766 | ||
767 | r = sd_device_get_sysattr_value(d, "loop/backing_file", &full_path); | |
768 | if (r < 0) | |
769 | log_debug_errno(r, "Failed to lookup image name via loop device backing file sysattr, ignoring: %m"); | |
770 | else { | |
771 | r = raw_strip_suffixes(basename(full_path), &name_stripped); | |
772 | if (r < 0) | |
773 | return r; | |
774 | } | |
775 | ||
776 | free_and_replace(m->image_name, name_stripped); | |
777 | } else { | |
778 | r = free_and_strdup(&m->image_name, sysname); | |
779 | if (r < 0) | |
780 | return r; | |
781 | } | |
782 | ||
783 | if (!image_name_is_valid(m->image_name)) { | |
784 | log_debug("Image name %s is not valid, ignoring", strempty(m->image_name)); | |
785 | m->image_name = mfree(m->image_name); | |
786 | } | |
787 | ||
e7cbe5cb | 788 | if ((!(flags & DISSECT_IMAGE_GPT_ONLY) && |
4b5de5dd | 789 | (flags & DISSECT_IMAGE_GENERIC_ROOT)) || |
e7cbe5cb | 790 | (flags & DISSECT_IMAGE_NO_PARTITION_TABLE)) { |
9b6deb03 | 791 | const char *usage = NULL; |
8c1be37e | 792 | |
aee36b4e LP |
793 | /* If flags permit this, also allow using non-partitioned single-filesystem images */ |
794 | ||
9b6deb03 LP |
795 | (void) blkid_probe_lookup_value(b, "USAGE", &usage, NULL); |
796 | if (STRPTR_IN_SET(usage, "filesystem", "crypto")) { | |
6c544d14 | 797 | const char *fstype = NULL, *options = NULL, *devname = NULL; |
18d73705 | 798 | _cleanup_free_ char *t = NULL, *n = NULL, *o = NULL; |
8c1be37e | 799 | |
9b6deb03 LP |
800 | /* OK, we have found a file system, that's our root partition then. */ |
801 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
8c1be37e | 802 | |
9b6deb03 LP |
803 | if (fstype) { |
804 | t = strdup(fstype); | |
805 | if (!t) | |
806 | return -ENOMEM; | |
807 | } | |
808 | ||
6c544d14 | 809 | r = sd_device_get_devname(d, &devname); |
54b22b26 LP |
810 | if (r < 0) |
811 | return r; | |
8c1be37e | 812 | |
6c544d14 LP |
813 | n = strdup(devname); |
814 | if (!n) | |
815 | return -ENOMEM; | |
816 | ||
e7cbe5cb | 817 | m->single_file_system = true; |
c3c88d67 LP |
818 | m->encrypted = streq_ptr(fstype, "crypto_LUKS"); |
819 | ||
820 | m->has_verity = verity && verity->data_path; | |
821 | m->verity_ready = m->has_verity && | |
822 | verity->root_hash && | |
823 | (verity->designator < 0 || verity->designator == PARTITION_ROOT); | |
e7cbe5cb | 824 | |
8ee9615e LP |
825 | m->has_verity_sig = false; /* signature not embedded, must be specified */ |
826 | m->verity_sig_ready = m->verity_ready && | |
827 | verity->root_hash_sig; | |
828 | ||
f5215bc8 | 829 | options = mount_options_from_designator(mount_options, PARTITION_ROOT); |
18d73705 LB |
830 | if (options) { |
831 | o = strdup(options); | |
832 | if (!o) | |
833 | return -ENOMEM; | |
834 | } | |
835 | ||
9b6deb03 LP |
836 | m->partitions[PARTITION_ROOT] = (DissectedPartition) { |
837 | .found = true, | |
e0d53d52 | 838 | .rw = !m->verity_ready && !fstype_is_ro(fstype), |
9b6deb03 LP |
839 | .partno = -1, |
840 | .architecture = _ARCHITECTURE_INVALID, | |
1cc6c93a YW |
841 | .fstype = TAKE_PTR(t), |
842 | .node = TAKE_PTR(n), | |
18d73705 | 843 | .mount_options = TAKE_PTR(o), |
88b3300f LP |
844 | .offset = 0, |
845 | .size = UINT64_MAX, | |
9b6deb03 | 846 | }; |
8c1be37e | 847 | |
1cc6c93a | 848 | *ret = TAKE_PTR(m); |
9b6deb03 LP |
849 | return 0; |
850 | } | |
8c1be37e LP |
851 | } |
852 | ||
853 | (void) blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL); | |
854 | if (!pttype) | |
855 | return -ENOPKG; | |
856 | ||
857 | is_gpt = streq_ptr(pttype, "gpt"); | |
858 | is_mbr = streq_ptr(pttype, "dos"); | |
859 | ||
9b6deb03 | 860 | if (!is_gpt && ((flags & DISSECT_IMAGE_GPT_ONLY) || !is_mbr)) |
8c1be37e LP |
861 | return -ENOPKG; |
862 | ||
0903fd26 LP |
863 | /* We support external verity data partitions only if the image has no partition table */ |
864 | if (verity && verity->data_path) | |
865 | return -EBADR; | |
866 | ||
4ba86848 LP |
867 | /* Safety check: refuse block devices that carry a partition table but for which the kernel doesn't |
868 | * do partition scanning. */ | |
869 | r = blockdev_partscan_enabled(fd); | |
870 | if (r < 0) | |
871 | return r; | |
872 | if (r == 0) | |
873 | return -EPROTONOSUPPORT; | |
874 | ||
8c1be37e LP |
875 | errno = 0; |
876 | pl = blkid_probe_get_partitions(b); | |
b382db9f | 877 | if (!pl) |
66855de7 | 878 | return errno_or_else(ENOMEM); |
8c1be37e | 879 | |
4ba86848 LP |
880 | errno = 0; |
881 | n_partitions = blkid_partlist_numof_partitions(pl); | |
882 | if (n_partitions < 0) | |
883 | return errno_or_else(EIO); | |
8c1be37e | 884 | |
4ba86848 LP |
885 | deadline = usec_add(now(CLOCK_MONOTONIC), DEVICE_TIMEOUT_USEC); |
886 | for (int i = 0; i < n_partitions; i++) { | |
887 | _cleanup_(sd_device_unrefp) sd_device *q = NULL; | |
9b6deb03 | 888 | unsigned long long pflags; |
88b3300f | 889 | blkid_loff_t start, size; |
8c1be37e | 890 | blkid_partition pp; |
cde942f6 | 891 | const char *node; |
8c1be37e LP |
892 | int nr; |
893 | ||
4ba86848 LP |
894 | errno = 0; |
895 | pp = blkid_partlist_get_partition(pl, i); | |
896 | if (!pp) | |
897 | return errno_or_else(EIO); | |
aae22eb3 | 898 | |
a3642997 | 899 | r = wait_for_partition_device(d, pp, deadline, diskseq, uevent_seqnum_not_before, timestamp_not_before, flags, &q); |
4ba86848 LP |
900 | if (r < 0) |
901 | return r; | |
7be1420f | 902 | |
3c1f2cee YW |
903 | r = sd_device_get_devname(q, &node); |
904 | if (r < 0) | |
4ba86848 | 905 | return r; |
8c1be37e | 906 | |
9b6deb03 | 907 | pflags = blkid_partition_get_flags(pp); |
8c1be37e | 908 | |
4ba86848 | 909 | errno = 0; |
8c1be37e LP |
910 | nr = blkid_partition_get_partno(pp); |
911 | if (nr < 0) | |
4ba86848 | 912 | return errno_or_else(EIO); |
8c1be37e | 913 | |
88b3300f LP |
914 | errno = 0; |
915 | start = blkid_partition_get_start(pp); | |
916 | if (start < 0) | |
917 | return errno_or_else(EIO); | |
918 | ||
919 | assert((uint64_t) start < UINT64_MAX/512); | |
920 | ||
921 | errno = 0; | |
922 | size = blkid_partition_get_size(pp); | |
923 | if (size < 0) | |
924 | return errno_or_else(EIO); | |
925 | ||
926 | assert((uint64_t) size < UINT64_MAX/512); | |
927 | ||
8c1be37e | 928 | if (is_gpt) { |
569a0e42 LP |
929 | PartitionDesignator designator = _PARTITION_DESIGNATOR_INVALID; |
930 | int architecture = _ARCHITECTURE_INVALID; | |
08fe0a53 | 931 | const char *stype, *sid, *fstype = NULL, *label; |
4623e8e6 | 932 | sd_id128_t type_id, id; |
de98f631 | 933 | bool rw = true, growfs = false; |
8c1be37e | 934 | |
4623e8e6 LP |
935 | sid = blkid_partition_get_uuid(pp); |
936 | if (!sid) | |
937 | continue; | |
938 | if (sd_id128_from_string(sid, &id) < 0) | |
939 | continue; | |
940 | ||
8c1be37e LP |
941 | stype = blkid_partition_get_type_string(pp); |
942 | if (!stype) | |
943 | continue; | |
8c1be37e LP |
944 | if (sd_id128_from_string(stype, &type_id) < 0) |
945 | continue; | |
946 | ||
08fe0a53 LP |
947 | label = blkid_partition_get_name(pp); /* libblkid returns NULL here if empty */ |
948 | ||
8c1be37e | 949 | if (sd_id128_equal(type_id, GPT_HOME)) { |
a48dd347 | 950 | |
de98f631 | 951 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 952 | |
a48dd347 LP |
953 | if (pflags & GPT_FLAG_NO_AUTO) |
954 | continue; | |
955 | ||
8c1be37e | 956 | designator = PARTITION_HOME; |
9b6deb03 | 957 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
de98f631 | 958 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e | 959 | |
8c1be37e | 960 | } else if (sd_id128_equal(type_id, GPT_SRV)) { |
a48dd347 | 961 | |
de98f631 | 962 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 963 | |
a48dd347 LP |
964 | if (pflags & GPT_FLAG_NO_AUTO) |
965 | continue; | |
966 | ||
8c1be37e | 967 | designator = PARTITION_SRV; |
9b6deb03 | 968 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
de98f631 | 969 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e | 970 | |
8c1be37e | 971 | } else if (sd_id128_equal(type_id, GPT_ESP)) { |
a48dd347 | 972 | |
aee36b4e LP |
973 | /* Note that we don't check the GPT_FLAG_NO_AUTO flag for the ESP, as it is |
974 | * not defined there. We instead check the GPT_FLAG_NO_BLOCK_IO_PROTOCOL, as | |
975 | * recommended by the UEFI spec (See "12.3.3 Number and Location of System | |
976 | * Partitions"). */ | |
a48dd347 LP |
977 | |
978 | if (pflags & GPT_FLAG_NO_BLOCK_IO_PROTOCOL) | |
979 | continue; | |
980 | ||
8c1be37e LP |
981 | designator = PARTITION_ESP; |
982 | fstype = "vfat"; | |
a8c47660 LP |
983 | |
984 | } else if (sd_id128_equal(type_id, GPT_XBOOTLDR)) { | |
985 | ||
de98f631 | 986 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 987 | |
a8c47660 LP |
988 | if (pflags & GPT_FLAG_NO_AUTO) |
989 | continue; | |
990 | ||
991 | designator = PARTITION_XBOOTLDR; | |
992 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
de98f631 | 993 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
8c1be37e LP |
994 | } |
995 | #ifdef GPT_ROOT_NATIVE | |
996 | else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE)) { | |
4623e8e6 | 997 | |
de98f631 | 998 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 999 | |
a48dd347 LP |
1000 | if (pflags & GPT_FLAG_NO_AUTO) |
1001 | continue; | |
1002 | ||
4623e8e6 LP |
1003 | /* If a root ID is specified, ignore everything but the root id */ |
1004 | if (!sd_id128_is_null(root_uuid) && !sd_id128_equal(root_uuid, id)) | |
1005 | continue; | |
1006 | ||
8c1be37e LP |
1007 | designator = PARTITION_ROOT; |
1008 | architecture = native_architecture(); | |
9b6deb03 | 1009 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
de98f631 | 1010 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e | 1011 | |
4f8b86e3 | 1012 | } else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE_VERITY)) { |
4623e8e6 | 1013 | |
0f7c9a3d LP |
1014 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
1015 | ||
a48dd347 LP |
1016 | if (pflags & GPT_FLAG_NO_AUTO) |
1017 | continue; | |
1018 | ||
c3c88d67 | 1019 | m->has_verity = true; |
4623e8e6 | 1020 | |
8ee9615e LP |
1021 | /* If no verity configuration is specified, then don't do verity */ |
1022 | if (!verity) | |
1023 | continue; | |
1024 | if (verity->designator >= 0 && verity->designator != PARTITION_ROOT) | |
1025 | continue; | |
1026 | ||
1027 | /* If root hash is specified, then ignore everything but the root id */ | |
1028 | if (!sd_id128_is_null(root_verity_uuid) && !sd_id128_equal(root_verity_uuid, id)) | |
4623e8e6 LP |
1029 | continue; |
1030 | ||
1031 | designator = PARTITION_ROOT_VERITY; | |
1032 | fstype = "DM_verity_hash"; | |
1033 | architecture = native_architecture(); | |
1034 | rw = false; | |
8ee9615e LP |
1035 | |
1036 | } else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE_VERITY_SIG)) { | |
1037 | ||
1038 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); | |
1039 | ||
1040 | if (pflags & GPT_FLAG_NO_AUTO) | |
1041 | continue; | |
1042 | ||
1043 | m->has_verity_sig = true; | |
1044 | ||
1045 | /* If root hash is specified explicitly, then ignore any embedded signature */ | |
1046 | if (!verity) | |
1047 | continue; | |
1048 | if (verity->designator >= 0 && verity->designator != PARTITION_ROOT) | |
1049 | continue; | |
1050 | if (verity->root_hash) | |
1051 | continue; | |
1052 | ||
1053 | designator = PARTITION_ROOT_VERITY_SIG; | |
1054 | fstype = "verity_hash_signature"; | |
1055 | architecture = native_architecture(); | |
1056 | rw = false; | |
4623e8e6 LP |
1057 | } |
1058 | #endif | |
8c1be37e LP |
1059 | #ifdef GPT_ROOT_SECONDARY |
1060 | else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY)) { | |
4623e8e6 | 1061 | |
de98f631 | 1062 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 1063 | |
a48dd347 LP |
1064 | if (pflags & GPT_FLAG_NO_AUTO) |
1065 | continue; | |
1066 | ||
4623e8e6 LP |
1067 | /* If a root ID is specified, ignore everything but the root id */ |
1068 | if (!sd_id128_is_null(root_uuid) && !sd_id128_equal(root_uuid, id)) | |
1069 | continue; | |
1070 | ||
8c1be37e LP |
1071 | designator = PARTITION_ROOT_SECONDARY; |
1072 | architecture = SECONDARY_ARCHITECTURE; | |
9b6deb03 | 1073 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
de98f631 | 1074 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e | 1075 | |
4f8b86e3 | 1076 | } else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY_VERITY)) { |
a48dd347 | 1077 | |
0f7c9a3d LP |
1078 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
1079 | ||
a48dd347 LP |
1080 | if (pflags & GPT_FLAG_NO_AUTO) |
1081 | continue; | |
1082 | ||
c3c88d67 | 1083 | m->has_verity = true; |
4623e8e6 | 1084 | |
8ee9615e LP |
1085 | /* Don't do verity if no verity config is passed in */ |
1086 | if (!verity) | |
1087 | continue; | |
1088 | if (verity->designator >= 0 && verity->designator != PARTITION_ROOT) | |
1089 | continue; | |
1090 | ||
1091 | /* If root hash is specified, then ignore everything but the root id */ | |
1092 | if (!sd_id128_is_null(root_verity_uuid) && !sd_id128_equal(root_verity_uuid, id)) | |
4623e8e6 LP |
1093 | continue; |
1094 | ||
1095 | designator = PARTITION_ROOT_SECONDARY_VERITY; | |
1096 | fstype = "DM_verity_hash"; | |
1097 | architecture = SECONDARY_ARCHITECTURE; | |
1098 | rw = false; | |
8ee9615e LP |
1099 | |
1100 | } else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY_VERITY_SIG)) { | |
1101 | ||
1102 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); | |
1103 | ||
1104 | if (pflags & GPT_FLAG_NO_AUTO) | |
1105 | continue; | |
1106 | ||
1107 | m->has_verity_sig = true; | |
1108 | ||
1109 | /* If root hash is specified explicitly, then ignore any embedded signature */ | |
1110 | if (!verity) | |
1111 | continue; | |
1112 | if (verity->designator >= 0 && verity->designator != PARTITION_ROOT) | |
1113 | continue; | |
1114 | if (verity->root_hash) | |
1115 | continue; | |
1116 | ||
1117 | designator = PARTITION_ROOT_SECONDARY_VERITY_SIG; | |
1118 | fstype = "verity_hash_signature"; | |
1119 | architecture = native_architecture(); | |
1120 | rw = false; | |
4623e8e6 | 1121 | } |
aee36b4e LP |
1122 | #endif |
1123 | #ifdef GPT_USR_NATIVE | |
1124 | else if (sd_id128_equal(type_id, GPT_USR_NATIVE)) { | |
1125 | ||
de98f631 | 1126 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
aee36b4e LP |
1127 | |
1128 | if (pflags & GPT_FLAG_NO_AUTO) | |
1129 | continue; | |
1130 | ||
1131 | /* If a usr ID is specified, ignore everything but the usr id */ | |
1132 | if (!sd_id128_is_null(usr_uuid) && !sd_id128_equal(usr_uuid, id)) | |
1133 | continue; | |
1134 | ||
1135 | designator = PARTITION_USR; | |
1136 | architecture = native_architecture(); | |
1137 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
de98f631 | 1138 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e LP |
1139 | |
1140 | } else if (sd_id128_equal(type_id, GPT_USR_NATIVE_VERITY)) { | |
1141 | ||
1142 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); | |
1143 | ||
1144 | if (pflags & GPT_FLAG_NO_AUTO) | |
1145 | continue; | |
1146 | ||
c3c88d67 | 1147 | m->has_verity = true; |
aee36b4e | 1148 | |
8ee9615e LP |
1149 | if (!verity) |
1150 | continue; | |
1151 | if (verity->designator >= 0 && verity->designator != PARTITION_USR) | |
1152 | continue; | |
1153 | ||
1154 | /* If usr hash is specified, then ignore everything but the usr id */ | |
1155 | if (!sd_id128_is_null(usr_verity_uuid) && !sd_id128_equal(usr_verity_uuid, id)) | |
aee36b4e LP |
1156 | continue; |
1157 | ||
1158 | designator = PARTITION_USR_VERITY; | |
1159 | fstype = "DM_verity_hash"; | |
1160 | architecture = native_architecture(); | |
1161 | rw = false; | |
8ee9615e LP |
1162 | |
1163 | } else if (sd_id128_equal(type_id, GPT_USR_NATIVE_VERITY_SIG)) { | |
1164 | ||
1165 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); | |
1166 | ||
1167 | if (pflags & GPT_FLAG_NO_AUTO) | |
1168 | continue; | |
1169 | ||
1170 | m->has_verity_sig = true; | |
1171 | ||
1172 | /* If usr hash is specified explicitly, then ignore any embedded signature */ | |
1173 | if (!verity) | |
1174 | continue; | |
1175 | if (verity->designator >= 0 && verity->designator != PARTITION_USR) | |
1176 | continue; | |
1177 | if (verity->root_hash) | |
1178 | continue; | |
1179 | ||
1180 | designator = PARTITION_USR_VERITY_SIG; | |
1181 | fstype = "verity_hash_signature"; | |
1182 | architecture = native_architecture(); | |
1183 | rw = false; | |
aee36b4e LP |
1184 | } |
1185 | #endif | |
1186 | #ifdef GPT_USR_SECONDARY | |
1187 | else if (sd_id128_equal(type_id, GPT_USR_SECONDARY)) { | |
1188 | ||
de98f631 | 1189 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
aee36b4e LP |
1190 | |
1191 | if (pflags & GPT_FLAG_NO_AUTO) | |
1192 | continue; | |
1193 | ||
1194 | /* If a usr ID is specified, ignore everything but the usr id */ | |
1195 | if (!sd_id128_is_null(usr_uuid) && !sd_id128_equal(usr_uuid, id)) | |
1196 | continue; | |
1197 | ||
1198 | designator = PARTITION_USR_SECONDARY; | |
1199 | architecture = SECONDARY_ARCHITECTURE; | |
1200 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
de98f631 | 1201 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e LP |
1202 | |
1203 | } else if (sd_id128_equal(type_id, GPT_USR_SECONDARY_VERITY)) { | |
1204 | ||
1205 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); | |
1206 | ||
1207 | if (pflags & GPT_FLAG_NO_AUTO) | |
1208 | continue; | |
1209 | ||
c3c88d67 | 1210 | m->has_verity = true; |
aee36b4e | 1211 | |
8ee9615e LP |
1212 | if (!verity) |
1213 | continue; | |
1214 | if (verity->designator >= 0 && verity->designator != PARTITION_USR) | |
1215 | continue; | |
1216 | ||
1217 | /* If usr hash is specified, then ignore everything but the root id */ | |
1218 | if (!sd_id128_is_null(usr_verity_uuid) && !sd_id128_equal(usr_verity_uuid, id)) | |
aee36b4e LP |
1219 | continue; |
1220 | ||
1221 | designator = PARTITION_USR_SECONDARY_VERITY; | |
1222 | fstype = "DM_verity_hash"; | |
1223 | architecture = SECONDARY_ARCHITECTURE; | |
1224 | rw = false; | |
8ee9615e LP |
1225 | |
1226 | } else if (sd_id128_equal(type_id, GPT_USR_SECONDARY_VERITY_SIG)) { | |
1227 | ||
1228 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); | |
1229 | ||
1230 | if (pflags & GPT_FLAG_NO_AUTO) | |
1231 | continue; | |
1232 | ||
1233 | m->has_verity_sig = true; | |
1234 | ||
1235 | /* If usr hash is specified explicitly, then ignore any embedded signature */ | |
1236 | if (!verity) | |
1237 | continue; | |
1238 | if (verity->designator >= 0 && verity->designator != PARTITION_USR) | |
1239 | continue; | |
1240 | if (verity->root_hash) | |
1241 | continue; | |
1242 | ||
1243 | designator = PARTITION_USR_SECONDARY_VERITY_SIG; | |
1244 | fstype = "verity_hash_signature"; | |
1245 | architecture = native_architecture(); | |
1246 | rw = false; | |
aee36b4e | 1247 | } |
8c1be37e LP |
1248 | #endif |
1249 | else if (sd_id128_equal(type_id, GPT_SWAP)) { | |
a48dd347 | 1250 | |
0f7c9a3d LP |
1251 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO); |
1252 | ||
a48dd347 LP |
1253 | if (pflags & GPT_FLAG_NO_AUTO) |
1254 | continue; | |
1255 | ||
8c1be37e | 1256 | designator = PARTITION_SWAP; |
aee36b4e | 1257 | |
8c1be37e LP |
1258 | } else if (sd_id128_equal(type_id, GPT_LINUX_GENERIC)) { |
1259 | ||
de98f631 | 1260 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 1261 | |
a48dd347 LP |
1262 | if (pflags & GPT_FLAG_NO_AUTO) |
1263 | continue; | |
1264 | ||
8c1be37e LP |
1265 | if (generic_node) |
1266 | multiple_generic = true; | |
1267 | else { | |
1268 | generic_nr = nr; | |
9b6deb03 | 1269 | generic_rw = !(pflags & GPT_FLAG_READ_ONLY); |
de98f631 | 1270 | generic_growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
be30ad41 | 1271 | generic_uuid = id; |
8c1be37e LP |
1272 | generic_node = strdup(node); |
1273 | if (!generic_node) | |
1274 | return -ENOMEM; | |
1275 | } | |
d4dffb85 LP |
1276 | |
1277 | } else if (sd_id128_equal(type_id, GPT_TMP)) { | |
1278 | ||
de98f631 | 1279 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 1280 | |
d4dffb85 LP |
1281 | if (pflags & GPT_FLAG_NO_AUTO) |
1282 | continue; | |
1283 | ||
1284 | designator = PARTITION_TMP; | |
1285 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
de98f631 | 1286 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
d4dffb85 LP |
1287 | |
1288 | } else if (sd_id128_equal(type_id, GPT_VAR)) { | |
1289 | ||
de98f631 | 1290 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 1291 | |
d4dffb85 LP |
1292 | if (pflags & GPT_FLAG_NO_AUTO) |
1293 | continue; | |
1294 | ||
1295 | if (!FLAGS_SET(flags, DISSECT_IMAGE_RELAX_VAR_CHECK)) { | |
1296 | sd_id128_t var_uuid; | |
1297 | ||
1298 | /* For /var we insist that the uuid of the partition matches the | |
1299 | * HMAC-SHA256 of the /var GPT partition type uuid, keyed by machine | |
1300 | * ID. Why? Unlike the other partitions /var is inherently | |
1301 | * installation specific, hence we need to be careful not to mount it | |
1302 | * in the wrong installation. By hashing the partition UUID from | |
1303 | * /etc/machine-id we can securely bind the partition to the | |
1304 | * installation. */ | |
1305 | ||
1306 | r = sd_id128_get_machine_app_specific(GPT_VAR, &var_uuid); | |
1307 | if (r < 0) | |
1308 | return r; | |
1309 | ||
1310 | if (!sd_id128_equal(var_uuid, id)) { | |
1311 | log_debug("Found a /var/ partition, but its UUID didn't match our expectations, ignoring."); | |
1312 | continue; | |
1313 | } | |
1314 | } | |
1315 | ||
1316 | designator = PARTITION_VAR; | |
1317 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
de98f631 | 1318 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
8c1be37e LP |
1319 | } |
1320 | ||
1321 | if (designator != _PARTITION_DESIGNATOR_INVALID) { | |
08fe0a53 | 1322 | _cleanup_free_ char *t = NULL, *n = NULL, *o = NULL, *l = NULL; |
18d73705 | 1323 | const char *options = NULL; |
8c1be37e | 1324 | |
08fe0a53 LP |
1325 | if (m->partitions[designator].found) { |
1326 | /* For most partition types the first one we see wins. Except for the | |
1327 | * rootfs and /usr, where we do a version compare of the label, and | |
1328 | * let the newest version win. This permits a simple A/B versioning | |
1329 | * scheme in OS images. */ | |
1330 | ||
1331 | if (!PARTITION_DESIGNATOR_VERSIONED(designator) || | |
1332 | strverscmp_improved(m->partitions[designator].label, label) >= 0) | |
1333 | continue; | |
1334 | ||
1335 | dissected_partition_done(m->partitions + designator); | |
1336 | } | |
8c1be37e LP |
1337 | |
1338 | if (fstype) { | |
1339 | t = strdup(fstype); | |
1340 | if (!t) | |
1341 | return -ENOMEM; | |
1342 | } | |
1343 | ||
1344 | n = strdup(node); | |
1345 | if (!n) | |
1346 | return -ENOMEM; | |
1347 | ||
08fe0a53 LP |
1348 | if (label) { |
1349 | l = strdup(label); | |
1350 | if (!l) | |
1351 | return -ENOMEM; | |
1352 | } | |
1353 | ||
f5215bc8 | 1354 | options = mount_options_from_designator(mount_options, designator); |
18d73705 LB |
1355 | if (options) { |
1356 | o = strdup(options); | |
1357 | if (!o) | |
1358 | return -ENOMEM; | |
1359 | } | |
1360 | ||
8c1be37e LP |
1361 | m->partitions[designator] = (DissectedPartition) { |
1362 | .found = true, | |
1363 | .partno = nr, | |
1364 | .rw = rw, | |
de98f631 | 1365 | .growfs = growfs, |
8c1be37e | 1366 | .architecture = architecture, |
1cc6c93a YW |
1367 | .node = TAKE_PTR(n), |
1368 | .fstype = TAKE_PTR(t), | |
08fe0a53 | 1369 | .label = TAKE_PTR(l), |
be30ad41 | 1370 | .uuid = id, |
18d73705 | 1371 | .mount_options = TAKE_PTR(o), |
88b3300f LP |
1372 | .offset = (uint64_t) start * 512, |
1373 | .size = (uint64_t) size * 512, | |
8c1be37e | 1374 | }; |
8c1be37e LP |
1375 | } |
1376 | ||
1377 | } else if (is_mbr) { | |
1378 | ||
a8c47660 | 1379 | switch (blkid_partition_get_type(pp)) { |
8c1be37e | 1380 | |
a8c47660 LP |
1381 | case 0x83: /* Linux partition */ |
1382 | ||
1383 | if (pflags != 0x80) /* Bootable flag */ | |
1384 | continue; | |
8c1be37e | 1385 | |
a8c47660 LP |
1386 | if (generic_node) |
1387 | multiple_generic = true; | |
1388 | else { | |
1389 | generic_nr = nr; | |
1390 | generic_rw = true; | |
de98f631 | 1391 | generic_growfs = false; |
a8c47660 LP |
1392 | generic_node = strdup(node); |
1393 | if (!generic_node) | |
1394 | return -ENOMEM; | |
1395 | } | |
1396 | ||
1397 | break; | |
1398 | ||
1399 | case 0xEA: { /* Boot Loader Spec extended $BOOT partition */ | |
18d73705 | 1400 | _cleanup_free_ char *n = NULL, *o = NULL; |
a8c47660 | 1401 | sd_id128_t id = SD_ID128_NULL; |
18d73705 | 1402 | const char *sid, *options = NULL; |
a8c47660 LP |
1403 | |
1404 | /* First one wins */ | |
1405 | if (m->partitions[PARTITION_XBOOTLDR].found) | |
1406 | continue; | |
1407 | ||
1408 | sid = blkid_partition_get_uuid(pp); | |
1409 | if (sid) | |
1410 | (void) sd_id128_from_string(sid, &id); | |
1411 | ||
1412 | n = strdup(node); | |
1413 | if (!n) | |
8c1be37e | 1414 | return -ENOMEM; |
a8c47660 | 1415 | |
f5215bc8 | 1416 | options = mount_options_from_designator(mount_options, PARTITION_XBOOTLDR); |
18d73705 LB |
1417 | if (options) { |
1418 | o = strdup(options); | |
1419 | if (!o) | |
1420 | return -ENOMEM; | |
1421 | } | |
1422 | ||
a8c47660 LP |
1423 | m->partitions[PARTITION_XBOOTLDR] = (DissectedPartition) { |
1424 | .found = true, | |
1425 | .partno = nr, | |
1426 | .rw = true, | |
de98f631 | 1427 | .growfs = false, |
a8c47660 LP |
1428 | .architecture = _ARCHITECTURE_INVALID, |
1429 | .node = TAKE_PTR(n), | |
1430 | .uuid = id, | |
18d73705 | 1431 | .mount_options = TAKE_PTR(o), |
88b3300f LP |
1432 | .offset = (uint64_t) start * 512, |
1433 | .size = (uint64_t) size * 512, | |
a8c47660 LP |
1434 | }; |
1435 | ||
1436 | break; | |
1437 | }} | |
8c1be37e LP |
1438 | } |
1439 | } | |
1440 | ||
74cb2db9 LP |
1441 | if (m->partitions[PARTITION_ROOT].found) { |
1442 | /* If we found the primary arch, then invalidate the secondary arch to avoid any ambiguities, | |
1443 | * since we never want to mount the secondary arch in this case. */ | |
1444 | m->partitions[PARTITION_ROOT_SECONDARY].found = false; | |
1445 | m->partitions[PARTITION_ROOT_SECONDARY_VERITY].found = false; | |
8ee9615e | 1446 | m->partitions[PARTITION_ROOT_SECONDARY_VERITY_SIG].found = false; |
aee36b4e LP |
1447 | m->partitions[PARTITION_USR_SECONDARY].found = false; |
1448 | m->partitions[PARTITION_USR_SECONDARY_VERITY].found = false; | |
8ee9615e | 1449 | m->partitions[PARTITION_USR_SECONDARY_VERITY_SIG].found = false; |
8c1be37e | 1450 | |
8ee9615e LP |
1451 | } else if (m->partitions[PARTITION_ROOT_VERITY].found || |
1452 | m->partitions[PARTITION_ROOT_VERITY_SIG].found) | |
7cf66030 | 1453 | return -EADDRNOTAVAIL; /* Verity found but no matching rootfs? Something is off, refuse. */ |
4623e8e6 | 1454 | |
7cf66030 | 1455 | else if (m->partitions[PARTITION_ROOT_SECONDARY].found) { |
aee36b4e | 1456 | |
7cf66030 LP |
1457 | /* No root partition found but there's one for the secondary architecture? Then upgrade |
1458 | * secondary arch to first */ | |
4623e8e6 | 1459 | |
7cf66030 LP |
1460 | m->partitions[PARTITION_ROOT] = m->partitions[PARTITION_ROOT_SECONDARY]; |
1461 | zero(m->partitions[PARTITION_ROOT_SECONDARY]); | |
1462 | m->partitions[PARTITION_ROOT_VERITY] = m->partitions[PARTITION_ROOT_SECONDARY_VERITY]; | |
1463 | zero(m->partitions[PARTITION_ROOT_SECONDARY_VERITY]); | |
8ee9615e LP |
1464 | m->partitions[PARTITION_ROOT_VERITY_SIG] = m->partitions[PARTITION_ROOT_SECONDARY_VERITY_SIG]; |
1465 | zero(m->partitions[PARTITION_ROOT_SECONDARY_VERITY_SIG]); | |
aee36b4e | 1466 | |
7cf66030 LP |
1467 | m->partitions[PARTITION_USR] = m->partitions[PARTITION_USR_SECONDARY]; |
1468 | zero(m->partitions[PARTITION_USR_SECONDARY]); | |
1469 | m->partitions[PARTITION_USR_VERITY] = m->partitions[PARTITION_USR_SECONDARY_VERITY]; | |
1470 | zero(m->partitions[PARTITION_USR_SECONDARY_VERITY]); | |
8ee9615e LP |
1471 | m->partitions[PARTITION_USR_VERITY_SIG] = m->partitions[PARTITION_USR_SECONDARY_VERITY_SIG]; |
1472 | zero(m->partitions[PARTITION_USR_SECONDARY_VERITY_SIG]); | |
e0f9e7bd | 1473 | |
8ee9615e LP |
1474 | } else if (m->partitions[PARTITION_ROOT_SECONDARY_VERITY].found || |
1475 | m->partitions[PARTITION_ROOT_SECONDARY_VERITY_SIG].found) | |
7cf66030 | 1476 | return -EADDRNOTAVAIL; /* as above */ |
18d73705 | 1477 | |
8ee9615e LP |
1478 | /* Hmm, we found a signature partition but no Verity data? Something is off. */ |
1479 | if (m->partitions[PARTITION_ROOT_VERITY_SIG].found && !m->partitions[PARTITION_ROOT_VERITY].found) | |
1480 | return -EADDRNOTAVAIL; | |
7cf66030 | 1481 | |
8ee9615e | 1482 | if (m->partitions[PARTITION_USR].found) { |
7cf66030 LP |
1483 | /* Invalidate secondary arch /usr/ if we found the primary arch */ |
1484 | m->partitions[PARTITION_USR_SECONDARY].found = false; | |
1485 | m->partitions[PARTITION_USR_SECONDARY_VERITY].found = false; | |
8ee9615e | 1486 | m->partitions[PARTITION_USR_SECONDARY_VERITY_SIG].found = false; |
7cf66030 | 1487 | |
8ee9615e LP |
1488 | } else if (m->partitions[PARTITION_USR_VERITY].found || |
1489 | m->partitions[PARTITION_USR_VERITY_SIG].found) | |
7cf66030 | 1490 | return -EADDRNOTAVAIL; /* as above */ |
8c1be37e | 1491 | |
7cf66030 | 1492 | else if (m->partitions[PARTITION_USR_SECONDARY].found) { |
e0f9e7bd | 1493 | |
7cf66030 LP |
1494 | /* Upgrade secondary arch to primary */ |
1495 | m->partitions[PARTITION_USR] = m->partitions[PARTITION_USR_SECONDARY]; | |
1496 | zero(m->partitions[PARTITION_USR_SECONDARY]); | |
1497 | m->partitions[PARTITION_USR_VERITY] = m->partitions[PARTITION_USR_SECONDARY_VERITY]; | |
1498 | zero(m->partitions[PARTITION_USR_SECONDARY_VERITY]); | |
8ee9615e LP |
1499 | m->partitions[PARTITION_USR_VERITY_SIG] = m->partitions[PARTITION_USR_SECONDARY_VERITY_SIG]; |
1500 | zero(m->partitions[PARTITION_USR_SECONDARY_VERITY_SIG]); | |
7cf66030 | 1501 | |
8ee9615e LP |
1502 | } else if (m->partitions[PARTITION_USR_SECONDARY_VERITY].found || |
1503 | m->partitions[PARTITION_USR_SECONDARY_VERITY_SIG].found) | |
7cf66030 LP |
1504 | return -EADDRNOTAVAIL; /* as above */ |
1505 | ||
8ee9615e LP |
1506 | /* Hmm, we found a signature partition but no Verity data? Something is off. */ |
1507 | if (m->partitions[PARTITION_USR_VERITY_SIG].found && !m->partitions[PARTITION_USR_VERITY].found) | |
1508 | return -EADDRNOTAVAIL; | |
1509 | ||
cb241a69 LP |
1510 | /* If root and /usr are combined then insist that the architecture matches */ |
1511 | if (m->partitions[PARTITION_ROOT].found && | |
1512 | m->partitions[PARTITION_USR].found && | |
1513 | (m->partitions[PARTITION_ROOT].architecture >= 0 && | |
1514 | m->partitions[PARTITION_USR].architecture >= 0 && | |
1515 | m->partitions[PARTITION_ROOT].architecture != m->partitions[PARTITION_USR].architecture)) | |
1516 | return -EADDRNOTAVAIL; | |
1517 | ||
4ab51780 LP |
1518 | if (!m->partitions[PARTITION_ROOT].found && |
1519 | !m->partitions[PARTITION_USR].found && | |
1520 | (flags & DISSECT_IMAGE_GENERIC_ROOT) && | |
00a8b34f | 1521 | (!verity || !verity->root_hash || verity->designator != PARTITION_USR)) { |
7cf66030 LP |
1522 | |
1523 | /* OK, we found nothing usable, then check if there's a single generic one distro, and use | |
4b5de5dd LP |
1524 | * that. If the root hash was set however, then we won't fall back to a generic node, because |
1525 | * the root hash decides. */ | |
7cf66030 LP |
1526 | |
1527 | /* If we didn't find a properly marked root partition, but we did find a single suitable | |
1528 | * generic Linux partition, then use this as root partition, if the caller asked for it. */ | |
1529 | if (multiple_generic) | |
1530 | return -ENOTUNIQ; | |
1531 | ||
4b5de5dd LP |
1532 | /* If we didn't find a generic node, then we can't fix this up either */ |
1533 | if (generic_node) { | |
1534 | _cleanup_free_ char *o = NULL; | |
1535 | const char *options; | |
8c1be37e | 1536 | |
f5215bc8 | 1537 | options = mount_options_from_designator(mount_options, PARTITION_ROOT); |
18d73705 LB |
1538 | if (options) { |
1539 | o = strdup(options); | |
1540 | if (!o) | |
1541 | return -ENOMEM; | |
1542 | } | |
1543 | ||
1f8fb21c | 1544 | assert(generic_nr >= 0); |
8c1be37e LP |
1545 | m->partitions[PARTITION_ROOT] = (DissectedPartition) { |
1546 | .found = true, | |
1547 | .rw = generic_rw, | |
de98f631 | 1548 | .growfs = generic_growfs, |
8c1be37e LP |
1549 | .partno = generic_nr, |
1550 | .architecture = _ARCHITECTURE_INVALID, | |
1cc6c93a | 1551 | .node = TAKE_PTR(generic_node), |
be30ad41 | 1552 | .uuid = generic_uuid, |
18d73705 | 1553 | .mount_options = TAKE_PTR(o), |
88b3300f LP |
1554 | .offset = UINT64_MAX, |
1555 | .size = UINT64_MAX, | |
8c1be37e | 1556 | }; |
e0f9e7bd | 1557 | } |
8c1be37e LP |
1558 | } |
1559 | ||
4b5de5dd LP |
1560 | /* Check if we have a root fs if we are told to do check. /usr alone is fine too, but only if appropriate flag for that is set too */ |
1561 | if (FLAGS_SET(flags, DISSECT_IMAGE_REQUIRE_ROOT) && | |
1562 | !(m->partitions[PARTITION_ROOT].found || (m->partitions[PARTITION_USR].found && FLAGS_SET(flags, DISSECT_IMAGE_USR_NO_ROOT)))) | |
1563 | return -ENXIO; | |
1564 | ||
7b32164f LP |
1565 | if (m->partitions[PARTITION_ROOT_VERITY].found) { |
1566 | /* We only support one verity partition per image, i.e. can't do for both /usr and root fs */ | |
1567 | if (m->partitions[PARTITION_USR_VERITY].found) | |
1568 | return -ENOTUNIQ; | |
1569 | ||
1570 | /* We don't support verity enabled root with a split out /usr. Neither with nor without | |
1571 | * verity there. (Note that we do support verity-less root with verity-full /usr, though.) */ | |
1572 | if (m->partitions[PARTITION_USR].found) | |
1573 | return -EADDRNOTAVAIL; | |
1574 | } | |
aee36b4e | 1575 | |
1903defc LP |
1576 | if (verity) { |
1577 | /* If a verity designator is specified, then insist that the matching partition exists */ | |
1578 | if (verity->designator >= 0 && !m->partitions[verity->designator].found) | |
1579 | return -EADDRNOTAVAIL; | |
aee36b4e | 1580 | |
1903defc | 1581 | if (verity->root_hash) { |
8ee9615e LP |
1582 | /* If we have an explicit root hash and found the partitions for it, then we are ready to use |
1583 | * Verity, set things up for it */ | |
1584 | ||
1903defc LP |
1585 | if (verity->designator < 0 || verity->designator == PARTITION_ROOT) { |
1586 | if (!m->partitions[PARTITION_ROOT_VERITY].found || !m->partitions[PARTITION_ROOT].found) | |
1587 | return -EADDRNOTAVAIL; | |
4623e8e6 | 1588 | |
1903defc LP |
1589 | /* If we found a verity setup, then the root partition is necessarily read-only. */ |
1590 | m->partitions[PARTITION_ROOT].rw = false; | |
1591 | m->verity_ready = true; | |
1903defc | 1592 | |
f9e0bb61 LP |
1593 | } else { |
1594 | assert(verity->designator == PARTITION_USR); | |
1595 | ||
1903defc LP |
1596 | if (!m->partitions[PARTITION_USR_VERITY].found || !m->partitions[PARTITION_USR].found) |
1597 | return -EADDRNOTAVAIL; | |
4623e8e6 | 1598 | |
1903defc LP |
1599 | m->partitions[PARTITION_USR].rw = false; |
1600 | m->verity_ready = true; | |
1601 | } | |
8ee9615e LP |
1602 | |
1603 | if (m->verity_ready) | |
b98416e1 | 1604 | m->verity_sig_ready = verity->root_hash_sig; |
8ee9615e LP |
1605 | |
1606 | } else if (m->partitions[verity->designator == PARTITION_USR ? PARTITION_USR_VERITY_SIG : PARTITION_ROOT_VERITY_SIG].found) { | |
1607 | ||
1608 | /* If we found an embedded signature partition, we are ready, too. */ | |
1609 | ||
1610 | m->verity_ready = m->verity_sig_ready = true; | |
1611 | m->partitions[verity->designator == PARTITION_USR ? PARTITION_USR : PARTITION_ROOT].rw = false; | |
aee36b4e | 1612 | } |
4623e8e6 LP |
1613 | } |
1614 | ||
18b5886e LP |
1615 | blkid_free_probe(b); |
1616 | b = NULL; | |
1617 | ||
8c1be37e | 1618 | /* Fill in file system types if we don't know them yet. */ |
569a0e42 | 1619 | for (PartitionDesignator i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) { |
18b5886e | 1620 | DissectedPartition *p = m->partitions + i; |
8c1be37e | 1621 | |
18b5886e | 1622 | if (!p->found) |
8c1be37e LP |
1623 | continue; |
1624 | ||
18b5886e LP |
1625 | if (!p->fstype && p->node) { |
1626 | r = probe_filesystem(p->node, &p->fstype); | |
7cc84b2c | 1627 | if (r < 0 && r != -EUCLEAN) |
18b5886e | 1628 | return r; |
8c1be37e LP |
1629 | } |
1630 | ||
18b5886e LP |
1631 | if (streq_ptr(p->fstype, "crypto_LUKS")) |
1632 | m->encrypted = true; | |
896f937f LP |
1633 | |
1634 | if (p->fstype && fstype_is_ro(p->fstype)) | |
1635 | p->rw = false; | |
de98f631 LP |
1636 | |
1637 | if (!p->rw) | |
1638 | p->growfs = false; | |
8c1be37e LP |
1639 | } |
1640 | ||
1cc6c93a | 1641 | *ret = TAKE_PTR(m); |
8c1be37e LP |
1642 | return 0; |
1643 | #else | |
1644 | return -EOPNOTSUPP; | |
1645 | #endif | |
1646 | } | |
1647 | ||
1648 | DissectedImage* dissected_image_unref(DissectedImage *m) { | |
8c1be37e LP |
1649 | if (!m) |
1650 | return NULL; | |
1651 | ||
08fe0a53 LP |
1652 | for (PartitionDesignator i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) |
1653 | dissected_partition_done(m->partitions + i); | |
8c1be37e | 1654 | |
593fe6c0 | 1655 | free(m->image_name); |
3b925504 LP |
1656 | free(m->hostname); |
1657 | strv_free(m->machine_info); | |
1658 | strv_free(m->os_release); | |
7718ac97 | 1659 | strv_free(m->extension_release); |
3b925504 | 1660 | |
5fecf46d | 1661 | return mfree(m); |
8c1be37e LP |
1662 | } |
1663 | ||
18b5886e | 1664 | static int is_loop_device(const char *path) { |
553e15f2 | 1665 | char s[SYS_BLOCK_PATH_MAX("/../loop/")]; |
18b5886e LP |
1666 | struct stat st; |
1667 | ||
1668 | assert(path); | |
1669 | ||
1670 | if (stat(path, &st) < 0) | |
1671 | return -errno; | |
1672 | ||
1673 | if (!S_ISBLK(st.st_mode)) | |
1674 | return -ENOTBLK; | |
1675 | ||
553e15f2 | 1676 | xsprintf_sys_block_path(s, "/loop/", st.st_dev); |
18b5886e LP |
1677 | if (access(s, F_OK) < 0) { |
1678 | if (errno != ENOENT) | |
1679 | return -errno; | |
1680 | ||
1681 | /* The device itself isn't a loop device, but maybe it's a partition and its parent is? */ | |
553e15f2 | 1682 | xsprintf_sys_block_path(s, "/../loop/", st.st_dev); |
18b5886e LP |
1683 | if (access(s, F_OK) < 0) |
1684 | return errno == ENOENT ? false : -errno; | |
1685 | } | |
1686 | ||
1687 | return true; | |
1688 | } | |
1689 | ||
cf32c486 LP |
1690 | static int run_fsck(const char *node, const char *fstype) { |
1691 | int r, exit_status; | |
1692 | pid_t pid; | |
1693 | ||
1694 | assert(node); | |
1695 | assert(fstype); | |
1696 | ||
1697 | r = fsck_exists(fstype); | |
1698 | if (r < 0) { | |
1699 | log_debug_errno(r, "Couldn't determine whether fsck for %s exists, proceeding anyway.", fstype); | |
1700 | return 0; | |
1701 | } | |
1702 | if (r == 0) { | |
1703 | log_debug("Not checking partition %s, as fsck for %s does not exist.", node, fstype); | |
1704 | return 0; | |
1705 | } | |
1706 | ||
1707 | r = safe_fork("(fsck)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_DEATHSIG|FORK_NULL_STDIO, &pid); | |
1708 | if (r < 0) | |
1709 | return log_debug_errno(r, "Failed to fork off fsck: %m"); | |
1710 | if (r == 0) { | |
1711 | /* Child */ | |
1712 | execl("/sbin/fsck", "/sbin/fsck", "-aT", node, NULL); | |
7e0ed2e9 | 1713 | log_open(); |
cf32c486 LP |
1714 | log_debug_errno(errno, "Failed to execl() fsck: %m"); |
1715 | _exit(FSCK_OPERATIONAL_ERROR); | |
1716 | } | |
1717 | ||
1718 | exit_status = wait_for_terminate_and_check("fsck", pid, 0); | |
1719 | if (exit_status < 0) | |
1720 | return log_debug_errno(exit_status, "Failed to fork off /sbin/fsck: %m"); | |
1721 | ||
1722 | if ((exit_status & ~FSCK_ERROR_CORRECTED) != FSCK_SUCCESS) { | |
1723 | log_debug("fsck failed with exit status %i.", exit_status); | |
1724 | ||
1725 | if ((exit_status & (FSCK_SYSTEM_SHOULD_REBOOT|FSCK_ERRORS_LEFT_UNCORRECTED)) != 0) | |
1726 | return log_debug_errno(SYNTHETIC_ERRNO(EUCLEAN), "File system is corrupted, refusing."); | |
1727 | ||
1728 | log_debug("Ignoring fsck error."); | |
1729 | } | |
1730 | ||
1731 | return 0; | |
1732 | } | |
1733 | ||
81939d9d LP |
1734 | static int fs_grow(const char *node_path, const char *mount_path) { |
1735 | _cleanup_close_ int mount_fd = -1, node_fd = -1; | |
81939d9d LP |
1736 | uint64_t size, newsize; |
1737 | int r; | |
1738 | ||
1739 | node_fd = open(node_path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY); | |
1740 | if (node_fd < 0) | |
1741 | return log_debug_errno(errno, "Failed to open node device %s: %m", node_path); | |
1742 | ||
1743 | if (ioctl(node_fd, BLKGETSIZE64, &size) != 0) | |
1744 | return log_debug_errno(errno, "Failed to get block device size of %s: %m", node_path); | |
1745 | ||
1746 | mount_fd = open(mount_path, O_RDONLY|O_DIRECTORY|O_CLOEXEC); | |
1747 | if (mount_fd < 0) | |
1748 | return log_debug_errno(errno, "Failed to open mountd file system %s: %m", mount_path); | |
1749 | ||
1750 | log_debug("Resizing \"%s\" to %"PRIu64" bytes...", mount_path, size); | |
1751 | r = resize_fs(mount_fd, size, &newsize); | |
1752 | if (r < 0) | |
1753 | return log_debug_errno(r, "Failed to resize \"%s\" to %"PRIu64" bytes: %m", mount_path, size); | |
1754 | ||
1755 | if (newsize == size) | |
1756 | log_debug("Successfully resized \"%s\" to %s bytes.", | |
2b59bf51 | 1757 | mount_path, FORMAT_BYTES(newsize)); |
81939d9d LP |
1758 | else { |
1759 | assert(newsize < size); | |
1760 | log_debug("Successfully resized \"%s\" to %s bytes (%"PRIu64" bytes lost due to blocksize).", | |
2b59bf51 | 1761 | mount_path, FORMAT_BYTES(newsize), size - newsize); |
81939d9d LP |
1762 | } |
1763 | ||
1764 | return 0; | |
1765 | } | |
1766 | ||
18b5886e LP |
1767 | static int mount_partition( |
1768 | DissectedPartition *m, | |
1769 | const char *where, | |
1770 | const char *directory, | |
2d3a5a73 | 1771 | uid_t uid_shift, |
21b61b1d | 1772 | uid_t uid_range, |
18b5886e LP |
1773 | DissectImageFlags flags) { |
1774 | ||
2d3a5a73 LP |
1775 | _cleanup_free_ char *chased = NULL, *options = NULL; |
1776 | const char *p, *node, *fstype; | |
21b61b1d | 1777 | bool rw, remap_uid_gid = false; |
2eedfd2d | 1778 | int r; |
8c1be37e LP |
1779 | |
1780 | assert(m); | |
1781 | assert(where); | |
1782 | ||
4dc28665 | 1783 | /* Use decrypted node and matching fstype if available, otherwise use the original device */ |
18b5886e | 1784 | node = m->decrypted_node ?: m->node; |
4dc28665 | 1785 | fstype = m->decrypted_node ? m->decrypted_fstype: m->fstype; |
18b5886e | 1786 | |
4dc28665 | 1787 | if (!m->found || !node) |
8c1be37e | 1788 | return 0; |
4dc28665 LP |
1789 | if (!fstype) |
1790 | return -EAFNOSUPPORT; | |
8c1be37e | 1791 | |
fa45d12c | 1792 | /* 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 | 1793 | if (streq(fstype, "crypto_LUKS")) |
fa45d12c | 1794 | return -EUNATCH; |
18b5886e | 1795 | |
ef9c184d | 1796 | rw = m->rw && !(flags & DISSECT_IMAGE_MOUNT_READ_ONLY); |
8c1be37e | 1797 | |
cf32c486 LP |
1798 | if (FLAGS_SET(flags, DISSECT_IMAGE_FSCK) && rw) { |
1799 | r = run_fsck(node, fstype); | |
1800 | if (r < 0) | |
1801 | return r; | |
1802 | } | |
1803 | ||
2eedfd2d | 1804 | if (directory) { |
334eb5b0 LP |
1805 | /* Automatically create missing mount points inside the image, if necessary. */ |
1806 | r = mkdir_p_root(where, directory, uid_shift, (gid_t) uid_shift, 0755); | |
1807 | if (r < 0 && r != -EROFS) | |
1808 | return r; | |
1f0f82f1 | 1809 | |
a5648b80 | 1810 | r = chase_symlinks(directory, where, CHASE_PREFIX_ROOT, &chased, NULL); |
2eedfd2d LP |
1811 | if (r < 0) |
1812 | return r; | |
1813 | ||
1814 | p = chased; | |
9842905e LP |
1815 | } else { |
1816 | /* Create top-level mount if missing – but only if this is asked for. This won't modify the | |
1817 | * image (as the branch above does) but the host hierarchy, and the created directory might | |
1818 | * survive our mount in the host hierarchy hence. */ | |
1819 | if (FLAGS_SET(flags, DISSECT_IMAGE_MKDIR)) { | |
1820 | r = mkdir_p(where, 0755); | |
1821 | if (r < 0) | |
1822 | return r; | |
1823 | } | |
1824 | ||
8c1be37e | 1825 | p = where; |
9842905e | 1826 | } |
8c1be37e | 1827 | |
18b5886e | 1828 | /* If requested, turn on discard support. */ |
154d2269 | 1829 | if (fstype_can_discard(fstype) && |
18b5886e | 1830 | ((flags & DISSECT_IMAGE_DISCARD) || |
3afda7c7 | 1831 | ((flags & DISSECT_IMAGE_DISCARD_ON_LOOP) && is_loop_device(m->node) > 0))) { |
2d3a5a73 LP |
1832 | options = strdup("discard"); |
1833 | if (!options) | |
1834 | return -ENOMEM; | |
1835 | } | |
1836 | ||
21b61b1d | 1837 | if (uid_is_valid(uid_shift) && uid_shift != 0) { |
2d3a5a73 | 1838 | |
21b61b1d LP |
1839 | if (fstype_can_uid_gid(fstype)) { |
1840 | _cleanup_free_ char *uid_option = NULL; | |
2d3a5a73 | 1841 | |
21b61b1d LP |
1842 | if (asprintf(&uid_option, "uid=" UID_FMT ",gid=" GID_FMT, uid_shift, (gid_t) uid_shift) < 0) |
1843 | return -ENOMEM; | |
1844 | ||
1845 | if (!strextend_with_separator(&options, ",", uid_option)) | |
1846 | return -ENOMEM; | |
1847 | } else if (FLAGS_SET(flags, DISSECT_IMAGE_MOUNT_IDMAPPED)) | |
1848 | remap_uid_gid = true; | |
2d3a5a73 | 1849 | } |
8c1be37e | 1850 | |
18d73705 | 1851 | if (!isempty(m->mount_options)) |
c2bc710b | 1852 | if (!strextend_with_separator(&options, ",", m->mount_options)) |
18d73705 LB |
1853 | return -ENOMEM; |
1854 | ||
b620bf33 LP |
1855 | /* So, when you request MS_RDONLY from ext4, then this means nothing. It happily still writes to the |
1856 | * backing storage. What's worse, the BLKRO[GS]ET flag and (in case of loopback devices) | |
1857 | * LO_FLAGS_READ_ONLY don't mean anything, they affect userspace accesses only, and write accesses | |
1858 | * from the upper file system still get propagated through to the underlying file system, | |
1859 | * unrestricted. To actually get ext4/xfs/btrfs to stop writing to the device we need to specify | |
1860 | * "norecovery" as mount option, in addition to MS_RDONLY. Yes, this sucks, since it means we need to | |
1861 | * carry a per file system table here. | |
1862 | * | |
1863 | * Note that this means that we might not be able to mount corrupted file systems as read-only | |
1864 | * anymore (since in some cases the kernel implementations will refuse mounting when corrupted, | |
1865 | * read-only and "norecovery" is specified). But I think for the case of automatically determined | |
1866 | * mount options for loopback devices this is the right choice, since otherwise using the same | |
1867 | * loopback file twice even in read-only mode, is going to fail badly sooner or later. The usecase of | |
1868 | * making reuse of the immutable images "just work" is more relevant to us than having read-only | |
1869 | * access that actually modifies stuff work on such image files. Or to say this differently: if | |
1870 | * people want their file systems to be fixed up they should just open them in writable mode, where | |
1871 | * all these problems don't exist. */ | |
1872 | if (!rw && STRPTR_IN_SET(fstype, "ext3", "ext4", "xfs", "btrfs")) | |
1873 | if (!strextend_with_separator(&options, ",", "norecovery")) | |
1874 | return -ENOMEM; | |
1875 | ||
511a8cfe | 1876 | r = mount_nofollow_verbose(LOG_DEBUG, node, p, fstype, MS_NODEV|(rw ? 0 : MS_RDONLY), options); |
d9223c07 LP |
1877 | if (r < 0) |
1878 | return r; | |
1879 | ||
81939d9d LP |
1880 | if (rw && m->growfs && FLAGS_SET(flags, DISSECT_IMAGE_GROWFS)) |
1881 | (void) fs_grow(node, p); | |
1882 | ||
21b61b1d LP |
1883 | if (remap_uid_gid) { |
1884 | r = remount_idmap(p, uid_shift, uid_range); | |
1885 | if (r < 0) | |
1886 | return r; | |
1887 | } | |
1888 | ||
d9223c07 | 1889 | return 1; |
8c1be37e LP |
1890 | } |
1891 | ||
7cf66030 LP |
1892 | static int mount_root_tmpfs(const char *where, uid_t uid_shift, DissectImageFlags flags) { |
1893 | _cleanup_free_ char *options = NULL; | |
1894 | int r; | |
1895 | ||
1896 | assert(where); | |
1897 | ||
1898 | /* For images that contain /usr/ but no rootfs, let's mount rootfs as tmpfs */ | |
1899 | ||
1900 | if (FLAGS_SET(flags, DISSECT_IMAGE_MKDIR)) { | |
1901 | r = mkdir_p(where, 0755); | |
1902 | if (r < 0) | |
1903 | return r; | |
1904 | } | |
1905 | ||
1906 | if (uid_is_valid(uid_shift)) { | |
1907 | if (asprintf(&options, "uid=" UID_FMT ",gid=" GID_FMT, uid_shift, (gid_t) uid_shift) < 0) | |
1908 | return -ENOMEM; | |
1909 | } | |
1910 | ||
1911 | r = mount_nofollow_verbose(LOG_DEBUG, "rootfs", where, "tmpfs", MS_NODEV, options); | |
1912 | if (r < 0) | |
1913 | return r; | |
1914 | ||
1915 | return 1; | |
1916 | } | |
1917 | ||
21b61b1d LP |
1918 | int dissected_image_mount( |
1919 | DissectedImage *m, | |
1920 | const char *where, | |
1921 | uid_t uid_shift, | |
1922 | uid_t uid_range, | |
1923 | DissectImageFlags flags) { | |
1924 | ||
1f0f82f1 | 1925 | int r, xbootldr_mounted; |
8c1be37e LP |
1926 | |
1927 | assert(m); | |
1928 | assert(where); | |
1929 | ||
fa45d12c LP |
1930 | /* Returns: |
1931 | * | |
1932 | * -ENXIO → No root partition found | |
7718ac97 | 1933 | * -EMEDIUMTYPE → DISSECT_IMAGE_VALIDATE_OS set but no os-release/extension-release file found |
fa45d12c LP |
1934 | * -EUNATCH → Encrypted partition found for which no dm-crypt was set up yet |
1935 | * -EUCLEAN → fsck for file system failed | |
1936 | * -EBUSY → File system already mounted/used elsewhere (kernel) | |
4dc28665 | 1937 | * -EAFNOSUPPORT → File system type not supported or not known |
fa45d12c LP |
1938 | */ |
1939 | ||
7cf66030 LP |
1940 | if (!(m->partitions[PARTITION_ROOT].found || |
1941 | (m->partitions[PARTITION_USR].found && FLAGS_SET(flags, DISSECT_IMAGE_USR_NO_ROOT)))) | |
1942 | return -ENXIO; /* Require a root fs or at least a /usr/ fs (the latter is subject to a flag of its own) */ | |
8c1be37e | 1943 | |
2d3a5a73 | 1944 | if ((flags & DISSECT_IMAGE_MOUNT_NON_ROOT_ONLY) == 0) { |
7cf66030 LP |
1945 | |
1946 | /* First mount the root fs. If there's none we use a tmpfs. */ | |
1947 | if (m->partitions[PARTITION_ROOT].found) | |
21b61b1d | 1948 | r = mount_partition(m->partitions + PARTITION_ROOT, where, NULL, uid_shift, uid_range, flags); |
7cf66030 LP |
1949 | else |
1950 | r = mount_root_tmpfs(where, uid_shift, flags); | |
2d3a5a73 LP |
1951 | if (r < 0) |
1952 | return r; | |
aee36b4e | 1953 | |
aee36b4e | 1954 | /* For us mounting root always means mounting /usr as well */ |
21b61b1d | 1955 | r = mount_partition(m->partitions + PARTITION_USR, where, "/usr", uid_shift, uid_range, flags); |
aee36b4e LP |
1956 | if (r < 0) |
1957 | return r; | |
03bcb6d4 | 1958 | |
9ccb531a LB |
1959 | if ((flags & (DISSECT_IMAGE_VALIDATE_OS|DISSECT_IMAGE_VALIDATE_OS_EXT)) != 0) { |
1960 | /* If either one of the validation flags are set, ensure that the image qualifies | |
1961 | * as one or the other (or both). */ | |
1962 | bool ok = false; | |
1963 | ||
1964 | if (FLAGS_SET(flags, DISSECT_IMAGE_VALIDATE_OS)) { | |
1965 | r = path_is_os_tree(where); | |
1966 | if (r < 0) | |
1967 | return r; | |
1968 | if (r > 0) | |
1969 | ok = true; | |
1970 | } | |
1971 | if (!ok && FLAGS_SET(flags, DISSECT_IMAGE_VALIDATE_OS_EXT)) { | |
7718ac97 LB |
1972 | r = path_is_extension_tree(where, m->image_name); |
1973 | if (r < 0) | |
1974 | return r; | |
9ccb531a LB |
1975 | if (r > 0) |
1976 | ok = true; | |
7718ac97 | 1977 | } |
9ccb531a LB |
1978 | |
1979 | if (!ok) | |
1980 | return -ENOMEDIUM; | |
03bcb6d4 | 1981 | } |
2d3a5a73 LP |
1982 | } |
1983 | ||
705727fd | 1984 | if (flags & DISSECT_IMAGE_MOUNT_ROOT_ONLY) |
2d3a5a73 | 1985 | return 0; |
8c1be37e | 1986 | |
21b61b1d | 1987 | r = mount_partition(m->partitions + PARTITION_HOME, where, "/home", uid_shift, uid_range, flags); |
8c1be37e LP |
1988 | if (r < 0) |
1989 | return r; | |
1990 | ||
21b61b1d | 1991 | r = mount_partition(m->partitions + PARTITION_SRV, where, "/srv", uid_shift, uid_range, flags); |
8c1be37e LP |
1992 | if (r < 0) |
1993 | return r; | |
1994 | ||
21b61b1d | 1995 | r = mount_partition(m->partitions + PARTITION_VAR, where, "/var", uid_shift, uid_range, flags); |
d4dffb85 LP |
1996 | if (r < 0) |
1997 | return r; | |
1998 | ||
21b61b1d | 1999 | r = mount_partition(m->partitions + PARTITION_TMP, where, "/var/tmp", uid_shift, uid_range, flags); |
d4dffb85 LP |
2000 | if (r < 0) |
2001 | return r; | |
2002 | ||
21b61b1d | 2003 | xbootldr_mounted = mount_partition(m->partitions + PARTITION_XBOOTLDR, where, "/boot", uid_shift, uid_range, flags); |
1f0f82f1 LP |
2004 | if (xbootldr_mounted < 0) |
2005 | return xbootldr_mounted; | |
d9223c07 | 2006 | |
8c1be37e | 2007 | if (m->partitions[PARTITION_ESP].found) { |
1f0f82f1 LP |
2008 | int esp_done = false; |
2009 | ||
d9223c07 LP |
2010 | /* Mount the ESP to /efi if it exists. If it doesn't exist, use /boot instead, but only if it |
2011 | * exists and is empty, and we didn't already mount the XBOOTLDR partition into it. */ | |
8c1be37e | 2012 | |
a5648b80 | 2013 | r = chase_symlinks("/efi", where, CHASE_PREFIX_ROOT, NULL, NULL); |
1f0f82f1 LP |
2014 | if (r < 0) { |
2015 | if (r != -ENOENT) | |
d9223c07 | 2016 | return r; |
8c1be37e | 2017 | |
1f0f82f1 LP |
2018 | /* /efi doesn't exist. Let's see if /boot is suitable then */ |
2019 | ||
2020 | if (!xbootldr_mounted) { | |
2021 | _cleanup_free_ char *p = NULL; | |
2eedfd2d | 2022 | |
1f0f82f1 LP |
2023 | r = chase_symlinks("/boot", where, CHASE_PREFIX_ROOT, &p, NULL); |
2024 | if (r < 0) { | |
2025 | if (r != -ENOENT) | |
2026 | return r; | |
2027 | } else if (dir_is_empty(p) > 0) { | |
2028 | /* It exists and is an empty directory. Let's mount the ESP there. */ | |
21b61b1d | 2029 | r = mount_partition(m->partitions + PARTITION_ESP, where, "/boot", uid_shift, uid_range, flags); |
1f0f82f1 LP |
2030 | if (r < 0) |
2031 | return r; | |
2032 | ||
2033 | esp_done = true; | |
2034 | } | |
2eedfd2d | 2035 | } |
8c1be37e | 2036 | } |
1f0f82f1 LP |
2037 | |
2038 | if (!esp_done) { | |
2039 | /* OK, let's mount the ESP now to /efi (possibly creating the dir if missing) */ | |
2040 | ||
21b61b1d | 2041 | r = mount_partition(m->partitions + PARTITION_ESP, where, "/efi", uid_shift, uid_range, flags); |
1f0f82f1 LP |
2042 | if (r < 0) |
2043 | return r; | |
2044 | } | |
8c1be37e LP |
2045 | } |
2046 | ||
2047 | return 0; | |
2048 | } | |
2049 | ||
21b61b1d LP |
2050 | int dissected_image_mount_and_warn( |
2051 | DissectedImage *m, | |
2052 | const char *where, | |
2053 | uid_t uid_shift, | |
2054 | uid_t uid_range, | |
2055 | DissectImageFlags flags) { | |
2056 | ||
af187ab2 LP |
2057 | int r; |
2058 | ||
2059 | assert(m); | |
2060 | assert(where); | |
2061 | ||
21b61b1d | 2062 | r = dissected_image_mount(m, where, uid_shift, uid_range, flags); |
af187ab2 LP |
2063 | if (r == -ENXIO) |
2064 | return log_error_errno(r, "Not root file system found in image."); | |
2065 | if (r == -EMEDIUMTYPE) | |
7718ac97 | 2066 | return log_error_errno(r, "No suitable os-release/extension-release file in image found."); |
af187ab2 LP |
2067 | if (r == -EUNATCH) |
2068 | return log_error_errno(r, "Encrypted file system discovered, but decryption not requested."); | |
2069 | if (r == -EUCLEAN) | |
2070 | return log_error_errno(r, "File system check on image failed."); | |
2071 | if (r == -EBUSY) | |
2072 | return log_error_errno(r, "File system already mounted elsewhere."); | |
4dc28665 LP |
2073 | if (r == -EAFNOSUPPORT) |
2074 | return log_error_errno(r, "File system type not supported or not known."); | |
af187ab2 LP |
2075 | if (r < 0) |
2076 | return log_error_errno(r, "Failed to mount image: %m"); | |
2077 | ||
2078 | return r; | |
2079 | } | |
2080 | ||
349cc4a5 | 2081 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
2082 | typedef struct DecryptedPartition { |
2083 | struct crypt_device *device; | |
2084 | char *name; | |
2085 | bool relinquished; | |
2086 | } DecryptedPartition; | |
2087 | ||
2088 | struct DecryptedImage { | |
2089 | DecryptedPartition *decrypted; | |
2090 | size_t n_decrypted; | |
18b5886e LP |
2091 | }; |
2092 | #endif | |
2093 | ||
2094 | DecryptedImage* decrypted_image_unref(DecryptedImage* d) { | |
349cc4a5 | 2095 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
2096 | int r; |
2097 | ||
2098 | if (!d) | |
2099 | return NULL; | |
2100 | ||
67f63ee5 | 2101 | for (size_t i = 0; i < d->n_decrypted; i++) { |
18b5886e LP |
2102 | DecryptedPartition *p = d->decrypted + i; |
2103 | ||
2104 | if (p->device && p->name && !p->relinquished) { | |
0d12936d | 2105 | r = sym_crypt_deactivate_by_name(p->device, p->name, 0); |
18b5886e LP |
2106 | if (r < 0) |
2107 | log_debug_errno(r, "Failed to deactivate encrypted partition %s", p->name); | |
2108 | } | |
2109 | ||
2110 | if (p->device) | |
0d12936d | 2111 | sym_crypt_free(p->device); |
18b5886e LP |
2112 | free(p->name); |
2113 | } | |
2114 | ||
f91861e4 | 2115 | free(d->decrypted); |
18b5886e LP |
2116 | free(d); |
2117 | #endif | |
2118 | return NULL; | |
2119 | } | |
2120 | ||
349cc4a5 | 2121 | #if HAVE_LIBCRYPTSETUP |
4623e8e6 LP |
2122 | |
2123 | static int make_dm_name_and_node(const void *original_node, const char *suffix, char **ret_name, char **ret_node) { | |
2124 | _cleanup_free_ char *name = NULL, *node = NULL; | |
2125 | const char *base; | |
2126 | ||
2127 | assert(original_node); | |
2128 | assert(suffix); | |
2129 | assert(ret_name); | |
2130 | assert(ret_node); | |
2131 | ||
2132 | base = strrchr(original_node, '/'); | |
2133 | if (!base) | |
ac1f3ad0 LB |
2134 | base = original_node; |
2135 | else | |
2136 | base++; | |
4623e8e6 LP |
2137 | if (isempty(base)) |
2138 | return -EINVAL; | |
2139 | ||
2140 | name = strjoin(base, suffix); | |
2141 | if (!name) | |
2142 | return -ENOMEM; | |
2143 | if (!filename_is_valid(name)) | |
2144 | return -EINVAL; | |
2145 | ||
0d12936d | 2146 | node = path_join(sym_crypt_get_dir(), name); |
4623e8e6 LP |
2147 | if (!node) |
2148 | return -ENOMEM; | |
2149 | ||
1cc6c93a YW |
2150 | *ret_name = TAKE_PTR(name); |
2151 | *ret_node = TAKE_PTR(node); | |
4623e8e6 | 2152 | |
4623e8e6 LP |
2153 | return 0; |
2154 | } | |
2155 | ||
18b5886e LP |
2156 | static int decrypt_partition( |
2157 | DissectedPartition *m, | |
2158 | const char *passphrase, | |
2159 | DissectImageFlags flags, | |
2160 | DecryptedImage *d) { | |
2161 | ||
2162 | _cleanup_free_ char *node = NULL, *name = NULL; | |
0d12936d | 2163 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
18b5886e LP |
2164 | int r; |
2165 | ||
2166 | assert(m); | |
2167 | assert(d); | |
2168 | ||
2169 | if (!m->found || !m->node || !m->fstype) | |
2170 | return 0; | |
2171 | ||
2172 | if (!streq(m->fstype, "crypto_LUKS")) | |
2173 | return 0; | |
2174 | ||
bdd73ac5 ZJS |
2175 | if (!passphrase) |
2176 | return -ENOKEY; | |
2177 | ||
0d12936d LP |
2178 | r = dlopen_cryptsetup(); |
2179 | if (r < 0) | |
2180 | return r; | |
2181 | ||
4623e8e6 LP |
2182 | r = make_dm_name_and_node(m->node, "-decrypted", &name, &node); |
2183 | if (r < 0) | |
2184 | return r; | |
18b5886e | 2185 | |
319a4f4b | 2186 | if (!GREEDY_REALLOC0(d->decrypted, d->n_decrypted + 1)) |
18b5886e LP |
2187 | return -ENOMEM; |
2188 | ||
0d12936d | 2189 | r = sym_crypt_init(&cd, m->node); |
18b5886e | 2190 | if (r < 0) |
715cbb81 | 2191 | return log_debug_errno(r, "Failed to initialize dm-crypt: %m"); |
18b5886e | 2192 | |
efc3b12f | 2193 | cryptsetup_enable_logging(cd); |
1887032f | 2194 | |
0d12936d | 2195 | r = sym_crypt_load(cd, CRYPT_LUKS, NULL); |
294bd454 ZJS |
2196 | if (r < 0) |
2197 | return log_debug_errno(r, "Failed to load LUKS metadata: %m"); | |
18b5886e | 2198 | |
0d12936d | 2199 | r = sym_crypt_activate_by_passphrase(cd, name, CRYPT_ANY_SLOT, passphrase, strlen(passphrase), |
ef9c184d | 2200 | ((flags & DISSECT_IMAGE_DEVICE_READ_ONLY) ? CRYPT_ACTIVATE_READONLY : 0) | |
0d12936d | 2201 | ((flags & DISSECT_IMAGE_DISCARD_ON_CRYPTO) ? CRYPT_ACTIVATE_ALLOW_DISCARDS : 0)); |
294bd454 | 2202 | if (r < 0) { |
715cbb81 | 2203 | log_debug_errno(r, "Failed to activate LUKS device: %m"); |
294bd454 | 2204 | return r == -EPERM ? -EKEYREJECTED : r; |
18b5886e | 2205 | } |
18b5886e | 2206 | |
94344385 LP |
2207 | d->decrypted[d->n_decrypted++] = (DecryptedPartition) { |
2208 | .name = TAKE_PTR(name), | |
2209 | .device = TAKE_PTR(cd), | |
2210 | }; | |
18b5886e | 2211 | |
1cc6c93a | 2212 | m->decrypted_node = TAKE_PTR(node); |
18b5886e LP |
2213 | |
2214 | return 0; | |
4623e8e6 LP |
2215 | } |
2216 | ||
89e62e0b LP |
2217 | static int verity_can_reuse( |
2218 | const VeritySettings *verity, | |
2219 | const char *name, | |
2220 | struct crypt_device **ret_cd) { | |
2221 | ||
ac1f3ad0 LB |
2222 | /* If the same volume was already open, check that the root hashes match, and reuse it if they do */ |
2223 | _cleanup_free_ char *root_hash_existing = NULL; | |
0d12936d | 2224 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
ac1f3ad0 | 2225 | struct crypt_params_verity crypt_params = {}; |
89e62e0b | 2226 | size_t root_hash_existing_size; |
ac1f3ad0 LB |
2227 | int r; |
2228 | ||
89e62e0b LP |
2229 | assert(verity); |
2230 | assert(name); | |
ac1f3ad0 LB |
2231 | assert(ret_cd); |
2232 | ||
0d12936d | 2233 | r = sym_crypt_init_by_name(&cd, name); |
ac1f3ad0 LB |
2234 | if (r < 0) |
2235 | return log_debug_errno(r, "Error opening verity device, crypt_init_by_name failed: %m"); | |
0d12936d | 2236 | |
c719805e LP |
2237 | cryptsetup_enable_logging(cd); |
2238 | ||
0d12936d | 2239 | r = sym_crypt_get_verity_info(cd, &crypt_params); |
ac1f3ad0 LB |
2240 | if (r < 0) |
2241 | return log_debug_errno(r, "Error opening verity device, crypt_get_verity_info failed: %m"); | |
0d12936d | 2242 | |
89e62e0b LP |
2243 | root_hash_existing_size = verity->root_hash_size; |
2244 | root_hash_existing = malloc0(root_hash_existing_size); | |
ac1f3ad0 LB |
2245 | if (!root_hash_existing) |
2246 | return -ENOMEM; | |
0d12936d LP |
2247 | |
2248 | r = sym_crypt_volume_key_get(cd, CRYPT_ANY_SLOT, root_hash_existing, &root_hash_existing_size, NULL, 0); | |
ac1f3ad0 LB |
2249 | if (r < 0) |
2250 | return log_debug_errno(r, "Error opening verity device, crypt_volume_key_get failed: %m"); | |
89e62e0b LP |
2251 | if (verity->root_hash_size != root_hash_existing_size || |
2252 | memcmp(root_hash_existing, verity->root_hash, verity->root_hash_size) != 0) | |
ac1f3ad0 | 2253 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Error opening verity device, it already exists but root hashes are different."); |
89e62e0b | 2254 | |
ac1f3ad0 | 2255 | #if HAVE_CRYPT_ACTIVATE_BY_SIGNED_KEY |
89e62e0b LP |
2256 | /* Ensure that, if signatures are supported, we only reuse the device if the previous mount used the |
2257 | * same settings, so that a previous unsigned mount will not be reused if the user asks to use | |
28423d9a | 2258 | * signing for the new one, and vice versa. */ |
89e62e0b | 2259 | if (!!verity->root_hash_sig != !!(crypt_params.flags & CRYPT_VERITY_ROOT_HASH_SIGNATURE)) |
ac1f3ad0 LB |
2260 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Error opening verity device, it already exists but signature settings are not the same."); |
2261 | #endif | |
2262 | ||
2263 | *ret_cd = TAKE_PTR(cd); | |
2264 | return 0; | |
2265 | } | |
2266 | ||
75db809a | 2267 | static inline char* dm_deferred_remove_clean(char *name) { |
ac1f3ad0 | 2268 | if (!name) |
75db809a | 2269 | return NULL; |
0d12936d LP |
2270 | |
2271 | (void) sym_crypt_deactivate_by_name(NULL, name, CRYPT_DEACTIVATE_DEFERRED); | |
75db809a | 2272 | return mfree(name); |
ac1f3ad0 LB |
2273 | } |
2274 | DEFINE_TRIVIAL_CLEANUP_FUNC(char *, dm_deferred_remove_clean); | |
2275 | ||
c2fa92e7 LP |
2276 | static int validate_signature_userspace(const VeritySettings *verity) { |
2277 | #if HAVE_OPENSSL | |
2278 | _cleanup_(sk_X509_free_allp) STACK_OF(X509) *sk = NULL; | |
2279 | _cleanup_strv_free_ char **certs = NULL; | |
2280 | _cleanup_(PKCS7_freep) PKCS7 *p7 = NULL; | |
2281 | _cleanup_free_ char *s = NULL; | |
2282 | _cleanup_(BIO_freep) BIO *bio = NULL; /* 'bio' must be freed first, 's' second, hence keep this order | |
2283 | * of declaration in place, please */ | |
2284 | const unsigned char *d; | |
2285 | char **i; | |
2286 | int r; | |
2287 | ||
2288 | assert(verity); | |
2289 | assert(verity->root_hash); | |
2290 | assert(verity->root_hash_sig); | |
2291 | ||
2292 | /* Because installing a signature certificate into the kernel chain is so messy, let's optionally do | |
2293 | * userspace validation. */ | |
2294 | ||
2295 | r = conf_files_list_nulstr(&certs, ".crt", NULL, CONF_FILES_REGULAR|CONF_FILES_FILTER_MASKED, CONF_PATHS_NULSTR("verity.d")); | |
2296 | if (r < 0) | |
2297 | return log_debug_errno(r, "Failed to enumerate certificates: %m"); | |
2298 | if (strv_isempty(certs)) { | |
2299 | log_debug("No userspace dm-verity certificates found."); | |
2300 | return 0; | |
2301 | } | |
2302 | ||
2303 | d = verity->root_hash_sig; | |
2304 | p7 = d2i_PKCS7(NULL, &d, (long) verity->root_hash_sig_size); | |
2305 | if (!p7) | |
2306 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to parse PKCS7 DER signature data."); | |
2307 | ||
2308 | s = hexmem(verity->root_hash, verity->root_hash_size); | |
2309 | if (!s) | |
2310 | return log_oom_debug(); | |
2311 | ||
2312 | bio = BIO_new_mem_buf(s, strlen(s)); | |
2313 | if (!bio) | |
2314 | return log_oom_debug(); | |
2315 | ||
2316 | sk = sk_X509_new_null(); | |
2317 | if (!sk) | |
2318 | return log_oom_debug(); | |
2319 | ||
2320 | STRV_FOREACH(i, certs) { | |
2321 | _cleanup_(X509_freep) X509 *c = NULL; | |
2322 | _cleanup_fclose_ FILE *f = NULL; | |
2323 | ||
2324 | f = fopen(*i, "re"); | |
2325 | if (!f) { | |
2326 | log_debug_errno(errno, "Failed to open '%s', ignoring: %m", *i); | |
2327 | continue; | |
2328 | } | |
2329 | ||
2330 | c = PEM_read_X509(f, NULL, NULL, NULL); | |
2331 | if (!c) { | |
2332 | log_debug("Failed to load X509 certificate '%s', ignoring.", *i); | |
2333 | continue; | |
2334 | } | |
2335 | ||
2336 | if (sk_X509_push(sk, c) == 0) | |
2337 | return log_oom_debug(); | |
2338 | ||
2339 | TAKE_PTR(c); | |
2340 | } | |
2341 | ||
2342 | r = PKCS7_verify(p7, sk, NULL, bio, NULL, PKCS7_NOINTERN|PKCS7_NOVERIFY); | |
2343 | if (r) | |
2344 | log_debug("Userspace PKCS#7 validation succeeded."); | |
2345 | else | |
2346 | log_debug("Userspace PKCS#7 validation failed: %s", ERR_error_string(ERR_get_error(), NULL)); | |
2347 | ||
2348 | return r; | |
2349 | #else | |
2350 | log_debug("Not doing client-side validation of dm-verity root hash signatures, OpenSSL support disabled."); | |
2351 | return 0; | |
2352 | #endif | |
2353 | } | |
2354 | ||
2355 | static int do_crypt_activate_verity( | |
2356 | struct crypt_device *cd, | |
2357 | const char *name, | |
2358 | const VeritySettings *verity) { | |
2359 | ||
2360 | bool check_signature; | |
2361 | int r; | |
2362 | ||
2363 | assert(cd); | |
2364 | assert(name); | |
2365 | assert(verity); | |
2366 | ||
2367 | if (verity->root_hash_sig) { | |
2368 | r = getenv_bool_secure("SYSTEMD_DISSECT_VERITY_SIGNATURE"); | |
2369 | if (r < 0 && r != -ENXIO) | |
2370 | log_debug_errno(r, "Failed to parse $SYSTEMD_DISSECT_VERITY_SIGNATURE"); | |
2371 | ||
2372 | check_signature = r != 0; | |
2373 | } else | |
2374 | check_signature = false; | |
2375 | ||
2376 | if (check_signature) { | |
2377 | ||
2378 | #if HAVE_CRYPT_ACTIVATE_BY_SIGNED_KEY | |
2379 | /* First, if we have support for signed keys in the kernel, then try that first. */ | |
2380 | r = sym_crypt_activate_by_signed_key( | |
2381 | cd, | |
2382 | name, | |
2383 | verity->root_hash, | |
2384 | verity->root_hash_size, | |
2385 | verity->root_hash_sig, | |
2386 | verity->root_hash_sig_size, | |
2387 | CRYPT_ACTIVATE_READONLY); | |
2388 | if (r >= 0) | |
2389 | return r; | |
2390 | ||
2391 | log_debug("Validation of dm-verity signature failed via the kernel, trying userspace validation instead."); | |
2392 | #else | |
2393 | log_debug("Activation of verity device with signature requested, but not supported via the kernel by %s due to missing crypt_activate_by_signed_key(), trying userspace validation instead.", | |
2394 | program_invocation_short_name); | |
2395 | #endif | |
2396 | ||
2397 | /* So this didn't work via the kernel, then let's try userspace validation instead. If that | |
2398 | * works we'll try to activate without telling the kernel the signature. */ | |
2399 | ||
2400 | r = validate_signature_userspace(verity); | |
2401 | if (r < 0) | |
2402 | return r; | |
2403 | if (r == 0) | |
2404 | return log_debug_errno(SYNTHETIC_ERRNO(ENOKEY), | |
2405 | "Activation of signed Verity volume worked neither via the kernel nor in userspace, can't activate."); | |
2406 | } | |
2407 | ||
2408 | return sym_crypt_activate_by_volume_key( | |
2409 | cd, | |
2410 | name, | |
2411 | verity->root_hash, | |
2412 | verity->root_hash_size, | |
2413 | CRYPT_ACTIVATE_READONLY); | |
2414 | } | |
2415 | ||
4623e8e6 | 2416 | static int verity_partition( |
aee36b4e | 2417 | PartitionDesignator designator, |
4623e8e6 LP |
2418 | DissectedPartition *m, |
2419 | DissectedPartition *v, | |
89e62e0b | 2420 | const VeritySettings *verity, |
4623e8e6 LP |
2421 | DissectImageFlags flags, |
2422 | DecryptedImage *d) { | |
2423 | ||
0d12936d | 2424 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
ac1f3ad0 | 2425 | _cleanup_(dm_deferred_remove_cleanp) char *restore_deferred_remove = NULL; |
89e62e0b | 2426 | _cleanup_free_ char *node = NULL, *name = NULL; |
4623e8e6 LP |
2427 | int r; |
2428 | ||
2429 | assert(m); | |
89e62e0b | 2430 | assert(v || (verity && verity->data_path)); |
4623e8e6 | 2431 | |
89e62e0b | 2432 | if (!verity || !verity->root_hash) |
4623e8e6 | 2433 | return 0; |
aee36b4e LP |
2434 | if (!((verity->designator < 0 && designator == PARTITION_ROOT) || |
2435 | (verity->designator == designator))) | |
2436 | return 0; | |
4623e8e6 LP |
2437 | |
2438 | if (!m->found || !m->node || !m->fstype) | |
2439 | return 0; | |
89e62e0b | 2440 | if (!verity->data_path) { |
e7cbe5cb LB |
2441 | if (!v->found || !v->node || !v->fstype) |
2442 | return 0; | |
4623e8e6 | 2443 | |
e7cbe5cb LB |
2444 | if (!streq(v->fstype, "DM_verity_hash")) |
2445 | return 0; | |
2446 | } | |
4623e8e6 | 2447 | |
0d12936d LP |
2448 | r = dlopen_cryptsetup(); |
2449 | if (r < 0) | |
2450 | return r; | |
2451 | ||
ac1f3ad0 LB |
2452 | if (FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) { |
2453 | /* Use the roothash, which is unique per volume, as the device node name, so that it can be reused */ | |
2454 | _cleanup_free_ char *root_hash_encoded = NULL; | |
0d12936d | 2455 | |
89e62e0b | 2456 | root_hash_encoded = hexmem(verity->root_hash, verity->root_hash_size); |
ac1f3ad0 LB |
2457 | if (!root_hash_encoded) |
2458 | return -ENOMEM; | |
aee36b4e | 2459 | |
ac1f3ad0 LB |
2460 | r = make_dm_name_and_node(root_hash_encoded, "-verity", &name, &node); |
2461 | } else | |
2462 | r = make_dm_name_and_node(m->node, "-verity", &name, &node); | |
4623e8e6 LP |
2463 | if (r < 0) |
2464 | return r; | |
2465 | ||
89e62e0b | 2466 | r = sym_crypt_init(&cd, verity->data_path ?: v->node); |
4623e8e6 LP |
2467 | if (r < 0) |
2468 | return r; | |
2469 | ||
efc3b12f | 2470 | cryptsetup_enable_logging(cd); |
1887032f | 2471 | |
0d12936d | 2472 | r = sym_crypt_load(cd, CRYPT_VERITY, NULL); |
4623e8e6 | 2473 | if (r < 0) |
294bd454 | 2474 | return r; |
4623e8e6 | 2475 | |
0d12936d | 2476 | r = sym_crypt_set_data_device(cd, m->node); |
4623e8e6 | 2477 | if (r < 0) |
294bd454 | 2478 | return r; |
4623e8e6 | 2479 | |
319a4f4b | 2480 | if (!GREEDY_REALLOC0(d->decrypted, d->n_decrypted + 1)) |
ac1f3ad0 LB |
2481 | return -ENOMEM; |
2482 | ||
2483 | /* If activating fails because the device already exists, check the metadata and reuse it if it matches. | |
2484 | * In case of ENODEV/ENOENT, which can happen if another process is activating at the exact same time, | |
2485 | * retry a few times before giving up. */ | |
2486 | for (unsigned i = 0; i < N_DEVICE_NODE_LIST_ATTEMPTS; i++) { | |
c2fa92e7 LP |
2487 | |
2488 | r = do_crypt_activate_verity(cd, name, verity); | |
ac1f3ad0 LB |
2489 | /* libdevmapper can return EINVAL when the device is already in the activation stage. |
2490 | * There's no way to distinguish this situation from a genuine error due to invalid | |
2aed63f4 | 2491 | * parameters, so immediately fall back to activating the device with a unique name. |
89e62e0b LP |
2492 | * Improvements in libcrypsetup can ensure this never happens: |
2493 | * https://gitlab.com/cryptsetup/cryptsetup/-/merge_requests/96 */ | |
ac1f3ad0 | 2494 | if (r == -EINVAL && FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) |
aee36b4e | 2495 | return verity_partition(designator, m, v, verity, flags & ~DISSECT_IMAGE_VERITY_SHARE, d); |
9ecb5c10 | 2496 | if (!IN_SET(r, |
22043172 | 2497 | 0, /* Success */ |
9ecb5c10 | 2498 | -EEXIST, /* Volume is already open and ready to be used */ |
22043172 LP |
2499 | -EBUSY, /* Volume is being opened but not ready, crypt_init_by_name can fetch details */ |
2500 | -ENODEV /* Volume is being opened but not ready, crypt_init_by_name would fail, try to open again */)) | |
ac1f3ad0 | 2501 | return r; |
9ecb5c10 | 2502 | if (IN_SET(r, -EEXIST, -EBUSY)) { |
ac1f3ad0 | 2503 | struct crypt_device *existing_cd = NULL; |
c2923fdc | 2504 | |
ac1f3ad0 LB |
2505 | if (!restore_deferred_remove){ |
2506 | /* To avoid races, disable automatic removal on umount while setting up the new device. Restore it on failure. */ | |
2507 | r = dm_deferred_remove_cancel(name); | |
9ecb5c10 LB |
2508 | /* If activation returns EBUSY there might be no deferred removal to cancel, that's fine */ |
2509 | if (r < 0 && r != -ENXIO) | |
ac1f3ad0 | 2510 | return log_debug_errno(r, "Disabling automated deferred removal for verity device %s failed: %m", node); |
9ecb5c10 LB |
2511 | if (r == 0) { |
2512 | restore_deferred_remove = strdup(name); | |
2513 | if (!restore_deferred_remove) | |
2514 | return -ENOMEM; | |
2515 | } | |
ac1f3ad0 | 2516 | } |
c2923fdc | 2517 | |
89e62e0b | 2518 | r = verity_can_reuse(verity, name, &existing_cd); |
ac1f3ad0 LB |
2519 | /* Same as above, -EINVAL can randomly happen when it actually means -EEXIST */ |
2520 | if (r == -EINVAL && FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) | |
aee36b4e | 2521 | return verity_partition(designator, m, v, verity, flags & ~DISSECT_IMAGE_VERITY_SHARE, d); |
9ecb5c10 | 2522 | if (!IN_SET(r, 0, -ENODEV, -ENOENT, -EBUSY)) |
ac1f3ad0 LB |
2523 | return log_debug_errno(r, "Checking whether existing verity device %s can be reused failed: %m", node); |
2524 | if (r == 0) { | |
c419b6f0 LB |
2525 | /* devmapper might say that the device exists, but the devlink might not yet have been |
2526 | * created. Check and wait for the udev event in that case. */ | |
9e3d9067 | 2527 | r = device_wait_for_devlink(node, "block", usec_add(now(CLOCK_MONOTONIC), 100 * USEC_PER_MSEC), NULL); |
c419b6f0 LB |
2528 | /* Fallback to activation with a unique device if it's taking too long */ |
2529 | if (r == -ETIMEDOUT) | |
2530 | break; | |
2531 | if (r < 0) | |
2532 | return r; | |
2533 | ||
ac1f3ad0 | 2534 | if (cd) |
0d12936d | 2535 | sym_crypt_free(cd); |
ac1f3ad0 LB |
2536 | cd = existing_cd; |
2537 | } | |
c2923fdc | 2538 | } |
ac1f3ad0 LB |
2539 | if (r == 0) |
2540 | break; | |
ecab4c47 LB |
2541 | |
2542 | /* Device is being opened by another process, but it has not finished yet, yield for 2ms */ | |
2543 | (void) usleep(2 * USEC_PER_MSEC); | |
ac1f3ad0 LB |
2544 | } |
2545 | ||
ac1f3ad0 LB |
2546 | /* An existing verity device was reported by libcryptsetup/libdevmapper, but we can't use it at this time. |
2547 | * Fall back to activating it with a unique device name. */ | |
2548 | if (r != 0 && FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) | |
aee36b4e | 2549 | return verity_partition(designator, m, v, verity, flags & ~DISSECT_IMAGE_VERITY_SHARE, d); |
ac1f3ad0 LB |
2550 | |
2551 | /* Everything looks good and we'll be able to mount the device, so deferred remove will be re-enabled at that point. */ | |
2552 | restore_deferred_remove = mfree(restore_deferred_remove); | |
4623e8e6 | 2553 | |
94344385 LP |
2554 | d->decrypted[d->n_decrypted++] = (DecryptedPartition) { |
2555 | .name = TAKE_PTR(name), | |
2556 | .device = TAKE_PTR(cd), | |
2557 | }; | |
4623e8e6 | 2558 | |
1cc6c93a | 2559 | m->decrypted_node = TAKE_PTR(node); |
4623e8e6 LP |
2560 | |
2561 | return 0; | |
18b5886e LP |
2562 | } |
2563 | #endif | |
2564 | ||
2565 | int dissected_image_decrypt( | |
2566 | DissectedImage *m, | |
2567 | const char *passphrase, | |
89e62e0b | 2568 | const VeritySettings *verity, |
18b5886e LP |
2569 | DissectImageFlags flags, |
2570 | DecryptedImage **ret) { | |
2571 | ||
349cc4a5 | 2572 | #if HAVE_LIBCRYPTSETUP |
49b5b3b4 | 2573 | _cleanup_(decrypted_image_unrefp) DecryptedImage *d = NULL; |
18b5886e LP |
2574 | int r; |
2575 | #endif | |
2576 | ||
2577 | assert(m); | |
89e62e0b | 2578 | assert(!verity || verity->root_hash || verity->root_hash_size == 0); |
18b5886e LP |
2579 | |
2580 | /* Returns: | |
2581 | * | |
2582 | * = 0 → There was nothing to decrypt | |
2583 | * > 0 → Decrypted successfully | |
d1c536f5 | 2584 | * -ENOKEY → There's something to decrypt but no key was supplied |
18b5886e LP |
2585 | * -EKEYREJECTED → Passed key was not correct |
2586 | */ | |
2587 | ||
89e62e0b | 2588 | if (verity && verity->root_hash && verity->root_hash_size < sizeof(sd_id128_t)) |
4623e8e6 LP |
2589 | return -EINVAL; |
2590 | ||
c3c88d67 | 2591 | if (!m->encrypted && !m->verity_ready) { |
18b5886e LP |
2592 | *ret = NULL; |
2593 | return 0; | |
2594 | } | |
2595 | ||
349cc4a5 | 2596 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
2597 | d = new0(DecryptedImage, 1); |
2598 | if (!d) | |
2599 | return -ENOMEM; | |
2600 | ||
569a0e42 | 2601 | for (PartitionDesignator i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) { |
18b5886e | 2602 | DissectedPartition *p = m->partitions + i; |
22043172 | 2603 | PartitionDesignator k; |
18b5886e LP |
2604 | |
2605 | if (!p->found) | |
2606 | continue; | |
2607 | ||
2608 | r = decrypt_partition(p, passphrase, flags, d); | |
2609 | if (r < 0) | |
2610 | return r; | |
2611 | ||
4623e8e6 LP |
2612 | k = PARTITION_VERITY_OF(i); |
2613 | if (k >= 0) { | |
aee36b4e | 2614 | r = verity_partition(i, p, m->partitions + k, verity, flags | DISSECT_IMAGE_VERITY_SHARE, d); |
4623e8e6 LP |
2615 | if (r < 0) |
2616 | return r; | |
2617 | } | |
2618 | ||
18b5886e LP |
2619 | if (!p->decrypted_fstype && p->decrypted_node) { |
2620 | r = probe_filesystem(p->decrypted_node, &p->decrypted_fstype); | |
7cc84b2c | 2621 | if (r < 0 && r != -EUCLEAN) |
18b5886e LP |
2622 | return r; |
2623 | } | |
2624 | } | |
2625 | ||
1cc6c93a | 2626 | *ret = TAKE_PTR(d); |
18b5886e LP |
2627 | |
2628 | return 1; | |
2629 | #else | |
2630 | return -EOPNOTSUPP; | |
2631 | #endif | |
2632 | } | |
2633 | ||
2634 | int dissected_image_decrypt_interactively( | |
2635 | DissectedImage *m, | |
2636 | const char *passphrase, | |
89e62e0b | 2637 | const VeritySettings *verity, |
18b5886e LP |
2638 | DissectImageFlags flags, |
2639 | DecryptedImage **ret) { | |
2640 | ||
2641 | _cleanup_strv_free_erase_ char **z = NULL; | |
2642 | int n = 3, r; | |
2643 | ||
2644 | if (passphrase) | |
2645 | n--; | |
2646 | ||
2647 | for (;;) { | |
89e62e0b | 2648 | r = dissected_image_decrypt(m, passphrase, verity, flags, ret); |
18b5886e LP |
2649 | if (r >= 0) |
2650 | return r; | |
2651 | if (r == -EKEYREJECTED) | |
2652 | log_error_errno(r, "Incorrect passphrase, try again!"); | |
fc95c359 YW |
2653 | else if (r != -ENOKEY) |
2654 | return log_error_errno(r, "Failed to decrypt image: %m"); | |
18b5886e | 2655 | |
baaa35ad ZJS |
2656 | if (--n < 0) |
2657 | return log_error_errno(SYNTHETIC_ERRNO(EKEYREJECTED), | |
2658 | "Too many retries."); | |
18b5886e LP |
2659 | |
2660 | z = strv_free(z); | |
2661 | ||
8806bb4b | 2662 | r = ask_password_auto("Please enter image passphrase:", NULL, "dissect", "dissect", "dissect.passphrase", USEC_INFINITY, 0, &z); |
18b5886e LP |
2663 | if (r < 0) |
2664 | return log_error_errno(r, "Failed to query for passphrase: %m"); | |
2665 | ||
2666 | passphrase = z[0]; | |
2667 | } | |
2668 | } | |
2669 | ||
18b5886e | 2670 | int decrypted_image_relinquish(DecryptedImage *d) { |
18b5886e LP |
2671 | assert(d); |
2672 | ||
67f63ee5 ZJS |
2673 | /* Turns on automatic removal after the last use ended for all DM devices of this image, and sets a |
2674 | * boolean so that we don't clean it up ourselves either anymore */ | |
18b5886e | 2675 | |
349cc4a5 | 2676 | #if HAVE_LIBCRYPTSETUP |
67f63ee5 ZJS |
2677 | int r; |
2678 | ||
2679 | for (size_t i = 0; i < d->n_decrypted; i++) { | |
18b5886e LP |
2680 | DecryptedPartition *p = d->decrypted + i; |
2681 | ||
2682 | if (p->relinquished) | |
2683 | continue; | |
2684 | ||
0d12936d | 2685 | r = sym_crypt_deactivate_by_name(NULL, p->name, CRYPT_DEACTIVATE_DEFERRED); |
18b5886e LP |
2686 | if (r < 0) |
2687 | return log_debug_errno(r, "Failed to mark %s for auto-removal: %m", p->name); | |
2688 | ||
2689 | p->relinquished = true; | |
2690 | } | |
2691 | #endif | |
2692 | ||
2693 | return 0; | |
2694 | } | |
2695 | ||
89e62e0b LP |
2696 | static char *build_auxiliary_path(const char *image, const char *suffix) { |
2697 | const char *e; | |
2698 | char *n; | |
2699 | ||
2700 | assert(image); | |
2701 | assert(suffix); | |
2702 | ||
2703 | e = endswith(image, ".raw"); | |
2704 | if (!e) | |
2705 | return strjoin(e, suffix); | |
2706 | ||
2707 | n = new(char, e - image + strlen(suffix) + 1); | |
2708 | if (!n) | |
2709 | return NULL; | |
2710 | ||
2711 | strcpy(mempcpy(n, image, e - image), suffix); | |
2712 | return n; | |
2713 | } | |
2714 | ||
2715 | void verity_settings_done(VeritySettings *v) { | |
2716 | assert(v); | |
2717 | ||
2718 | v->root_hash = mfree(v->root_hash); | |
2719 | v->root_hash_size = 0; | |
2720 | ||
2721 | v->root_hash_sig = mfree(v->root_hash_sig); | |
2722 | v->root_hash_sig_size = 0; | |
2723 | ||
2724 | v->data_path = mfree(v->data_path); | |
2725 | } | |
2726 | ||
2727 | int verity_settings_load( | |
2728 | VeritySettings *verity, | |
f5ea63a5 LP |
2729 | const char *image, |
2730 | const char *root_hash_path, | |
89e62e0b LP |
2731 | const char *root_hash_sig_path) { |
2732 | ||
2733 | _cleanup_free_ void *root_hash = NULL, *root_hash_sig = NULL; | |
2734 | size_t root_hash_size = 0, root_hash_sig_size = 0; | |
2735 | _cleanup_free_ char *verity_data_path = NULL; | |
aee36b4e | 2736 | PartitionDesignator designator; |
78ebe980 LP |
2737 | int r; |
2738 | ||
89e62e0b | 2739 | assert(verity); |
78ebe980 | 2740 | assert(image); |
aee36b4e | 2741 | assert(verity->designator < 0 || IN_SET(verity->designator, PARTITION_ROOT, PARTITION_USR)); |
78ebe980 | 2742 | |
89e62e0b LP |
2743 | /* If we are asked to load the root hash for a device node, exit early */ |
2744 | if (is_device_path(image)) | |
78ebe980 | 2745 | return 0; |
78ebe980 | 2746 | |
d5fcc5b0 LP |
2747 | r = getenv_bool_secure("SYSTEMD_DISSECT_VERITY_SIDECAR"); |
2748 | if (r < 0 && r != -ENXIO) | |
2749 | log_debug_errno(r, "Failed to parse $SYSTEMD_DISSECT_VERITY_SIDECAR, ignoring: %m"); | |
2750 | if (r == 0) | |
2751 | return 0; | |
2752 | ||
aee36b4e LP |
2753 | designator = verity->designator; |
2754 | ||
89e62e0b | 2755 | /* We only fill in what isn't already filled in */ |
c2923fdc | 2756 | |
89e62e0b | 2757 | if (!verity->root_hash) { |
e7cbe5cb | 2758 | _cleanup_free_ char *text = NULL; |
e7cbe5cb | 2759 | |
0389f4fa | 2760 | if (root_hash_path) { |
aee36b4e | 2761 | /* If explicitly specified it takes precedence */ |
0389f4fa LB |
2762 | r = read_one_line_file(root_hash_path, &text); |
2763 | if (r < 0) | |
e7cbe5cb | 2764 | return r; |
aee36b4e LP |
2765 | |
2766 | if (designator < 0) | |
2767 | designator = PARTITION_ROOT; | |
0389f4fa | 2768 | } else { |
aee36b4e LP |
2769 | /* Otherwise look for xattr and separate file, and first for the data for root and if |
2770 | * that doesn't exist for /usr */ | |
0389f4fa | 2771 | |
aee36b4e | 2772 | if (designator < 0 || designator == PARTITION_ROOT) { |
c53e07e2 | 2773 | r = getxattr_malloc(image, "user.verity.roothash", &text); |
aee36b4e LP |
2774 | if (r < 0) { |
2775 | _cleanup_free_ char *p = NULL; | |
78ebe980 | 2776 | |
aee36b4e LP |
2777 | if (!IN_SET(r, -ENODATA, -ENOENT) && !ERRNO_IS_NOT_SUPPORTED(r)) |
2778 | return r; | |
e7cbe5cb | 2779 | |
aee36b4e LP |
2780 | p = build_auxiliary_path(image, ".roothash"); |
2781 | if (!p) | |
2782 | return -ENOMEM; | |
2783 | ||
2784 | r = read_one_line_file(p, &text); | |
2785 | if (r < 0 && r != -ENOENT) | |
2786 | return r; | |
2787 | } | |
2788 | ||
2789 | if (text) | |
2790 | designator = PARTITION_ROOT; | |
2791 | } | |
2792 | ||
2793 | if (!text && (designator < 0 || designator == PARTITION_USR)) { | |
2794 | /* So in the "roothash" xattr/file name above the "root" of course primarily | |
2795 | * refers to the root of the Verity Merkle tree. But coincidentally it also | |
2796 | * is the hash for the *root* file system, i.e. the "root" neatly refers to | |
2797 | * two distinct concepts called "root". Taking benefit of this happy | |
2798 | * coincidence we call the file with the root hash for the /usr/ file system | |
2799 | * `usrhash`, because `usrroothash` or `rootusrhash` would just be too | |
2800 | * confusing. We thus drop the reference to the root of the Merkle tree, and | |
2801 | * just indicate which file system it's about. */ | |
c53e07e2 | 2802 | r = getxattr_malloc(image, "user.verity.usrhash", &text); |
aee36b4e LP |
2803 | if (r < 0) { |
2804 | _cleanup_free_ char *p = NULL; | |
2805 | ||
2806 | if (!IN_SET(r, -ENODATA, -ENOENT) && !ERRNO_IS_NOT_SUPPORTED(r)) | |
2807 | return r; | |
2808 | ||
2809 | p = build_auxiliary_path(image, ".usrhash"); | |
2810 | if (!p) | |
2811 | return -ENOMEM; | |
2812 | ||
2813 | r = read_one_line_file(p, &text); | |
2814 | if (r < 0 && r != -ENOENT) | |
2815 | return r; | |
2816 | } | |
2817 | ||
2818 | if (text) | |
2819 | designator = PARTITION_USR; | |
0389f4fa | 2820 | } |
e7cbe5cb LB |
2821 | } |
2822 | ||
2823 | if (text) { | |
89e62e0b | 2824 | r = unhexmem(text, strlen(text), &root_hash, &root_hash_size); |
e7cbe5cb LB |
2825 | if (r < 0) |
2826 | return r; | |
89e62e0b | 2827 | if (root_hash_size < sizeof(sd_id128_t)) |
e7cbe5cb LB |
2828 | return -EINVAL; |
2829 | } | |
2830 | } | |
2831 | ||
90f98986 | 2832 | if ((root_hash || verity->root_hash) && !verity->root_hash_sig) { |
aee36b4e | 2833 | if (root_hash_sig_path) { |
ae9cf30b | 2834 | r = read_full_file(root_hash_sig_path, (char**) &root_hash_sig, &root_hash_sig_size); |
aee36b4e LP |
2835 | if (r < 0 && r != -ENOENT) |
2836 | return r; | |
2837 | ||
2838 | if (designator < 0) | |
2839 | designator = PARTITION_ROOT; | |
2840 | } else { | |
2841 | if (designator < 0 || designator == PARTITION_ROOT) { | |
2842 | _cleanup_free_ char *p = NULL; | |
2843 | ||
2844 | /* Follow naming convention recommended by the relevant RFC: | |
2845 | * https://tools.ietf.org/html/rfc5751#section-3.2.1 */ | |
2846 | p = build_auxiliary_path(image, ".roothash.p7s"); | |
2847 | if (!p) | |
2848 | return -ENOMEM; | |
89e62e0b | 2849 | |
ae9cf30b | 2850 | r = read_full_file(p, (char**) &root_hash_sig, &root_hash_sig_size); |
aee36b4e LP |
2851 | if (r < 0 && r != -ENOENT) |
2852 | return r; | |
2853 | if (r >= 0) | |
2854 | designator = PARTITION_ROOT; | |
2855 | } | |
2856 | ||
2857 | if (!root_hash_sig && (designator < 0 || designator == PARTITION_USR)) { | |
2858 | _cleanup_free_ char *p = NULL; | |
2859 | ||
2860 | p = build_auxiliary_path(image, ".usrhash.p7s"); | |
2861 | if (!p) | |
2862 | return -ENOMEM; | |
89e62e0b | 2863 | |
ae9cf30b | 2864 | r = read_full_file(p, (char**) &root_hash_sig, &root_hash_sig_size); |
aee36b4e LP |
2865 | if (r < 0 && r != -ENOENT) |
2866 | return r; | |
2867 | if (r >= 0) | |
2868 | designator = PARTITION_USR; | |
2869 | } | |
89e62e0b LP |
2870 | } |
2871 | ||
aee36b4e | 2872 | if (root_hash_sig && root_hash_sig_size == 0) /* refuse empty size signatures */ |
89e62e0b LP |
2873 | return -EINVAL; |
2874 | } | |
2875 | ||
2876 | if (!verity->data_path) { | |
2877 | _cleanup_free_ char *p = NULL; | |
2878 | ||
2879 | p = build_auxiliary_path(image, ".verity"); | |
2880 | if (!p) | |
2881 | return -ENOMEM; | |
2882 | ||
2883 | if (access(p, F_OK) < 0) { | |
2884 | if (errno != ENOENT) | |
2885 | return -errno; | |
2886 | } else | |
2887 | verity_data_path = TAKE_PTR(p); | |
2888 | } | |
2889 | ||
2890 | if (root_hash) { | |
2891 | verity->root_hash = TAKE_PTR(root_hash); | |
2892 | verity->root_hash_size = root_hash_size; | |
2893 | } | |
2894 | ||
2895 | if (root_hash_sig) { | |
2896 | verity->root_hash_sig = TAKE_PTR(root_hash_sig); | |
2897 | verity->root_hash_sig_size = root_hash_sig_size; | |
e7cbe5cb | 2898 | } |
89e62e0b LP |
2899 | |
2900 | if (verity_data_path) | |
2901 | verity->data_path = TAKE_PTR(verity_data_path); | |
78ebe980 | 2902 | |
aee36b4e LP |
2903 | if (verity->designator < 0) |
2904 | verity->designator = designator; | |
2905 | ||
78ebe980 LP |
2906 | return 1; |
2907 | } | |
2908 | ||
88b3300f LP |
2909 | int dissected_image_load_verity_sig_partition( |
2910 | DissectedImage *m, | |
2911 | int fd, | |
2912 | VeritySettings *verity) { | |
2913 | ||
2914 | _cleanup_free_ void *root_hash = NULL, *root_hash_sig = NULL; | |
2915 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
2916 | size_t root_hash_size, root_hash_sig_size; | |
2917 | _cleanup_free_ char *buf = NULL; | |
2918 | PartitionDesignator d; | |
2919 | DissectedPartition *p; | |
2920 | JsonVariant *rh, *sig; | |
2921 | ssize_t n; | |
2922 | char *e; | |
2923 | int r; | |
2924 | ||
2925 | assert(m); | |
2926 | assert(fd >= 0); | |
2927 | assert(verity); | |
2928 | ||
2929 | if (verity->root_hash && verity->root_hash_sig) /* Already loaded? */ | |
2930 | return 0; | |
2931 | ||
2932 | r = getenv_bool_secure("SYSTEMD_DISSECT_VERITY_EMBEDDED"); | |
2933 | if (r < 0 && r != -ENXIO) | |
2934 | log_debug_errno(r, "Failed to parse $SYSTEMD_DISSECT_VERITY_EMBEDDED, ignoring: %m"); | |
2935 | if (r == 0) | |
2936 | return 0; | |
2937 | ||
2938 | d = PARTITION_VERITY_SIG_OF(verity->designator < 0 ? PARTITION_ROOT : verity->designator); | |
2939 | assert(d >= 0); | |
2940 | ||
2941 | p = m->partitions + d; | |
2942 | if (!p->found) | |
2943 | return 0; | |
2944 | if (p->offset == UINT64_MAX || p->size == UINT64_MAX) | |
2945 | return -EINVAL; | |
2946 | ||
2947 | if (p->size > 4*1024*1024) /* Signature data cannot possible be larger than 4M, refuse that */ | |
2948 | return -EFBIG; | |
2949 | ||
2950 | buf = new(char, p->size+1); | |
2951 | if (!buf) | |
2952 | return -ENOMEM; | |
2953 | ||
2954 | n = pread(fd, buf, p->size, p->offset); | |
2955 | if (n < 0) | |
2956 | return -ENOMEM; | |
2957 | if ((uint64_t) n != p->size) | |
2958 | return -EIO; | |
2959 | ||
2960 | e = memchr(buf, 0, p->size); | |
2961 | if (e) { | |
2962 | /* If we found a NUL byte then the rest of the data must be NUL too */ | |
2963 | if (!memeqzero(e, p->size - (e - buf))) | |
2964 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Signature data contains embedded NUL byte."); | |
2965 | } else | |
2966 | buf[p->size] = 0; | |
2967 | ||
2968 | r = json_parse(buf, 0, &v, NULL, NULL); | |
2969 | if (r < 0) | |
2970 | return log_debug_errno(r, "Failed to parse signature JSON data: %m"); | |
2971 | ||
2972 | rh = json_variant_by_key(v, "rootHash"); | |
2973 | if (!rh) | |
2974 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Signature JSON object lacks 'rootHash' field."); | |
2975 | if (!json_variant_is_string(rh)) | |
2976 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "'rootHash' field of signature JSON object is not a string."); | |
2977 | ||
2978 | r = unhexmem(json_variant_string(rh), SIZE_MAX, &root_hash, &root_hash_size); | |
2979 | if (r < 0) | |
2980 | return log_debug_errno(r, "Failed to parse root hash field: %m"); | |
2981 | ||
2982 | /* Check if specified root hash matches if it is specified */ | |
2983 | if (verity->root_hash && | |
2984 | memcmp_nn(verity->root_hash, verity->root_hash_size, root_hash, root_hash_size) != 0) { | |
2985 | _cleanup_free_ char *a = NULL, *b = NULL; | |
2986 | ||
2987 | a = hexmem(root_hash, root_hash_size); | |
2988 | b = hexmem(verity->root_hash, verity->root_hash_size); | |
2989 | ||
2990 | return log_debug_errno(r, "Root hash in signature JSON data (%s) doesn't match configured hash (%s).", strna(a), strna(b)); | |
2991 | } | |
2992 | ||
2993 | sig = json_variant_by_key(v, "signature"); | |
2994 | if (!sig) | |
2995 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Signature JSON object lacks 'signature' field."); | |
2996 | if (!json_variant_is_string(sig)) | |
2997 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "'signature' field of signature JSON object is not a string."); | |
2998 | ||
2999 | r = unbase64mem(json_variant_string(sig), SIZE_MAX, &root_hash_sig, &root_hash_sig_size); | |
3000 | if (r < 0) | |
3001 | return log_debug_errno(r, "Failed to parse signature field: %m"); | |
3002 | ||
3003 | free_and_replace(verity->root_hash, root_hash); | |
3004 | verity->root_hash_size = root_hash_size; | |
3005 | ||
3006 | free_and_replace(verity->root_hash_sig, root_hash_sig); | |
3007 | verity->root_hash_sig_size = root_hash_sig_size; | |
3008 | ||
3009 | return 1; | |
3010 | } | |
3011 | ||
3b925504 LP |
3012 | int dissected_image_acquire_metadata(DissectedImage *m) { |
3013 | ||
3014 | enum { | |
3015 | META_HOSTNAME, | |
3016 | META_MACHINE_ID, | |
3017 | META_MACHINE_INFO, | |
3018 | META_OS_RELEASE, | |
7718ac97 | 3019 | META_EXTENSION_RELEASE, |
a4e0d617 | 3020 | META_HAS_INIT_SYSTEM, |
3b925504 LP |
3021 | _META_MAX, |
3022 | }; | |
3023 | ||
9a4b883b | 3024 | static const char *const paths[_META_MAX] = { |
7718ac97 LB |
3025 | [META_HOSTNAME] = "/etc/hostname\0", |
3026 | [META_MACHINE_ID] = "/etc/machine-id\0", | |
3027 | [META_MACHINE_INFO] = "/etc/machine-info\0", | |
9a4b883b LB |
3028 | [META_OS_RELEASE] = ("/etc/os-release\0" |
3029 | "/usr/lib/os-release\0"), | |
a4e0d617 LP |
3030 | [META_EXTENSION_RELEASE] = "extension-release\0", /* Used only for logging. */ |
3031 | [META_HAS_INIT_SYSTEM] = "has-init-system\0", /* ditto */ | |
3b925504 LP |
3032 | }; |
3033 | ||
7718ac97 | 3034 | _cleanup_strv_free_ char **machine_info = NULL, **os_release = NULL, **extension_release = NULL; |
af8219d5 | 3035 | _cleanup_close_pair_ int error_pipe[2] = { -1, -1 }; |
3b925504 LP |
3036 | _cleanup_(rmdir_and_freep) char *t = NULL; |
3037 | _cleanup_(sigkill_waitp) pid_t child = 0; | |
3038 | sd_id128_t machine_id = SD_ID128_NULL; | |
3039 | _cleanup_free_ char *hostname = NULL; | |
67f63ee5 | 3040 | unsigned n_meta_initialized = 0; |
af8219d5 | 3041 | int fds[2 * _META_MAX], r, v; |
a4e0d617 | 3042 | int has_init_system = -1; |
af8219d5 | 3043 | ssize_t n; |
3b925504 LP |
3044 | |
3045 | BLOCK_SIGNALS(SIGCHLD); | |
3046 | ||
3047 | assert(m); | |
3048 | ||
7718ac97 | 3049 | for (; n_meta_initialized < _META_MAX; n_meta_initialized ++) { |
d9119c00 LP |
3050 | if (!paths[n_meta_initialized]) { |
3051 | fds[2*n_meta_initialized] = fds[2*n_meta_initialized+1] = -1; | |
7718ac97 | 3052 | continue; |
d9119c00 LP |
3053 | } |
3054 | ||
3b925504 LP |
3055 | if (pipe2(fds + 2*n_meta_initialized, O_CLOEXEC) < 0) { |
3056 | r = -errno; | |
3057 | goto finish; | |
3058 | } | |
7718ac97 | 3059 | } |
3b925504 LP |
3060 | |
3061 | r = mkdtemp_malloc("/tmp/dissect-XXXXXX", &t); | |
3062 | if (r < 0) | |
3063 | goto finish; | |
3064 | ||
af8219d5 LP |
3065 | if (pipe2(error_pipe, O_CLOEXEC) < 0) { |
3066 | r = -errno; | |
3067 | goto finish; | |
3068 | } | |
3069 | ||
e2047ba9 | 3070 | r = safe_fork("(sd-dissect)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_NEW_MOUNTNS|FORK_MOUNTNS_SLAVE, &child); |
be39f6ee | 3071 | if (r < 0) |
3b925504 | 3072 | goto finish; |
be39f6ee | 3073 | if (r == 0) { |
a4e0d617 | 3074 | /* Child in a new mount namespace */ |
af8219d5 LP |
3075 | error_pipe[0] = safe_close(error_pipe[0]); |
3076 | ||
7cf66030 LP |
3077 | r = dissected_image_mount( |
3078 | m, | |
3079 | t, | |
3080 | UID_INVALID, | |
21b61b1d | 3081 | UID_INVALID, |
7cf66030 LP |
3082 | DISSECT_IMAGE_READ_ONLY| |
3083 | DISSECT_IMAGE_MOUNT_ROOT_ONLY| | |
3084 | DISSECT_IMAGE_VALIDATE_OS| | |
9ccb531a | 3085 | DISSECT_IMAGE_VALIDATE_OS_EXT| |
7cf66030 | 3086 | DISSECT_IMAGE_USR_NO_ROOT); |
429d4e41 | 3087 | if (r < 0) { |
af8219d5 LP |
3088 | /* Let parent know the error */ |
3089 | (void) write(error_pipe[1], &r, sizeof(r)); | |
3090 | ||
429d4e41 | 3091 | log_debug_errno(r, "Failed to mount dissected image: %m"); |
3b925504 | 3092 | _exit(EXIT_FAILURE); |
429d4e41 | 3093 | } |
3b925504 | 3094 | |
67f63ee5 | 3095 | for (unsigned k = 0; k < _META_MAX; k++) { |
37e44c3f | 3096 | _cleanup_close_ int fd = -ENOENT; |
3b925504 LP |
3097 | const char *p; |
3098 | ||
7718ac97 LB |
3099 | if (!paths[k]) |
3100 | continue; | |
3101 | ||
3b925504 LP |
3102 | fds[2*k] = safe_close(fds[2*k]); |
3103 | ||
a4e0d617 LP |
3104 | switch (k) { |
3105 | ||
3106 | case META_EXTENSION_RELEASE: | |
9a4b883b LB |
3107 | /* As per the os-release spec, if the image is an extension it will have a file |
3108 | * named after the image name in extension-release.d/ - we use the image name | |
3109 | * and try to resolve it with the extension-release helpers, as sometimes | |
3110 | * the image names are mangled on deployment and do not match anymore. | |
3111 | * Unlike other paths this is not fixed, and the image name | |
3112 | * can be mangled on deployment, so by calling into the helper | |
3113 | * we allow a fallback that matches on the first extension-release | |
3114 | * file found in the directory, if one named after the image cannot | |
3115 | * be found first. */ | |
3116 | r = open_extension_release(t, m->image_name, NULL, &fd); | |
3117 | if (r < 0) | |
3118 | fd = r; /* Propagate the error. */ | |
a4e0d617 LP |
3119 | break; |
3120 | ||
3121 | case META_HAS_INIT_SYSTEM: { | |
3122 | bool found = false; | |
3123 | const char *init; | |
3124 | ||
3125 | FOREACH_STRING(init, | |
3126 | "/usr/lib/systemd/systemd", /* systemd on /usr merged system */ | |
3127 | "/lib/systemd/systemd", /* systemd on /usr non-merged systems */ | |
3128 | "/sbin/init") { /* traditional path the Linux kernel invokes */ | |
3129 | ||
3130 | r = chase_symlinks(init, t, CHASE_PREFIX_ROOT, NULL, NULL); | |
3131 | if (r < 0) { | |
3132 | if (r != -ENOENT) | |
3133 | log_debug_errno(r, "Failed to resolve %s, ignoring: %m", init); | |
3134 | } else { | |
3135 | found = true; | |
3136 | break; | |
3137 | } | |
3138 | } | |
3139 | ||
3140 | r = loop_write(fds[2*k+1], &found, sizeof(found), false); | |
3141 | if (r < 0) | |
3142 | goto inner_fail; | |
3143 | ||
3144 | continue; | |
3145 | } | |
3146 | ||
3147 | default: | |
9a4b883b LB |
3148 | NULSTR_FOREACH(p, paths[k]) { |
3149 | fd = chase_symlinks_and_open(p, t, CHASE_PREFIX_ROOT, O_RDONLY|O_CLOEXEC|O_NOCTTY, NULL); | |
3150 | if (fd >= 0) | |
3151 | break; | |
3152 | } | |
a4e0d617 LP |
3153 | } |
3154 | ||
36952d19 LP |
3155 | if (fd < 0) { |
3156 | log_debug_errno(fd, "Failed to read %s file of image, ignoring: %m", paths[k]); | |
37e44c3f | 3157 | fds[2*k+1] = safe_close(fds[2*k+1]); |
3b925504 | 3158 | continue; |
36952d19 | 3159 | } |
3b925504 | 3160 | |
f5fbe71d | 3161 | r = copy_bytes(fd, fds[2*k+1], UINT64_MAX, 0); |
a4e0d617 LP |
3162 | if (r < 0) |
3163 | goto inner_fail; | |
3b925504 LP |
3164 | |
3165 | fds[2*k+1] = safe_close(fds[2*k+1]); | |
3166 | } | |
3167 | ||
3168 | _exit(EXIT_SUCCESS); | |
a4e0d617 LP |
3169 | |
3170 | inner_fail: | |
3171 | (void) write(error_pipe[1], &r, sizeof(r)); | |
3172 | _exit(EXIT_FAILURE); | |
3b925504 LP |
3173 | } |
3174 | ||
af8219d5 LP |
3175 | error_pipe[1] = safe_close(error_pipe[1]); |
3176 | ||
67f63ee5 | 3177 | for (unsigned k = 0; k < _META_MAX; k++) { |
3b925504 LP |
3178 | _cleanup_fclose_ FILE *f = NULL; |
3179 | ||
7718ac97 LB |
3180 | if (!paths[k]) |
3181 | continue; | |
3182 | ||
3b925504 LP |
3183 | fds[2*k+1] = safe_close(fds[2*k+1]); |
3184 | ||
4fa744a3 | 3185 | f = take_fdopen(&fds[2*k], "r"); |
3b925504 LP |
3186 | if (!f) { |
3187 | r = -errno; | |
3188 | goto finish; | |
3189 | } | |
3190 | ||
3b925504 LP |
3191 | switch (k) { |
3192 | ||
3193 | case META_HOSTNAME: | |
3194 | r = read_etc_hostname_stream(f, &hostname); | |
3195 | if (r < 0) | |
3196 | log_debug_errno(r, "Failed to read /etc/hostname: %m"); | |
3197 | ||
3198 | break; | |
3199 | ||
3200 | case META_MACHINE_ID: { | |
3201 | _cleanup_free_ char *line = NULL; | |
3202 | ||
3203 | r = read_line(f, LONG_LINE_MAX, &line); | |
3204 | if (r < 0) | |
3205 | log_debug_errno(r, "Failed to read /etc/machine-id: %m"); | |
3206 | else if (r == 33) { | |
3207 | r = sd_id128_from_string(line, &machine_id); | |
3208 | if (r < 0) | |
3209 | log_debug_errno(r, "Image contains invalid /etc/machine-id: %s", line); | |
3210 | } else if (r == 0) | |
3211 | log_debug("/etc/machine-id file is empty."); | |
ab763cb2 HS |
3212 | else if (streq(line, "uninitialized")) |
3213 | log_debug("/etc/machine-id file is uninitialized (likely aborted first boot)."); | |
3b925504 LP |
3214 | else |
3215 | log_debug("/etc/machine-id has unexpected length %i.", r); | |
3216 | ||
3217 | break; | |
3218 | } | |
3219 | ||
3220 | case META_MACHINE_INFO: | |
aa8fbc74 | 3221 | r = load_env_file_pairs(f, "machine-info", &machine_info); |
3b925504 LP |
3222 | if (r < 0) |
3223 | log_debug_errno(r, "Failed to read /etc/machine-info: %m"); | |
3224 | ||
3225 | break; | |
3226 | ||
3227 | case META_OS_RELEASE: | |
aa8fbc74 | 3228 | r = load_env_file_pairs(f, "os-release", &os_release); |
3b925504 LP |
3229 | if (r < 0) |
3230 | log_debug_errno(r, "Failed to read OS release file: %m"); | |
3231 | ||
3232 | break; | |
7718ac97 LB |
3233 | |
3234 | case META_EXTENSION_RELEASE: | |
3235 | r = load_env_file_pairs(f, "extension-release", &extension_release); | |
3236 | if (r < 0) | |
3237 | log_debug_errno(r, "Failed to read extension release file: %m"); | |
3238 | ||
3239 | break; | |
a4e0d617 LP |
3240 | |
3241 | case META_HAS_INIT_SYSTEM: { | |
3242 | bool b = false; | |
3243 | size_t nr; | |
3244 | ||
3245 | errno = 0; | |
3246 | nr = fread(&b, 1, sizeof(b), f); | |
3247 | if (nr != sizeof(b)) | |
3248 | log_debug_errno(errno_or_else(EIO), "Failed to read has-init-system boolean: %m"); | |
3249 | else | |
3250 | has_init_system = b; | |
3251 | ||
3252 | break; | |
3253 | }} | |
3b925504 LP |
3254 | } |
3255 | ||
2e87a1fd | 3256 | r = wait_for_terminate_and_check("(sd-dissect)", child, 0); |
3b925504 | 3257 | child = 0; |
2e87a1fd | 3258 | if (r < 0) |
af8219d5 LP |
3259 | return r; |
3260 | ||
3261 | n = read(error_pipe[0], &v, sizeof(v)); | |
3262 | if (n < 0) | |
3263 | return -errno; | |
3264 | if (n == sizeof(v)) | |
3265 | return v; /* propagate error sent to us from child */ | |
3266 | if (n != 0) | |
3267 | return -EIO; | |
3268 | ||
2e87a1fd LP |
3269 | if (r != EXIT_SUCCESS) |
3270 | return -EPROTO; | |
3b925504 LP |
3271 | |
3272 | free_and_replace(m->hostname, hostname); | |
3273 | m->machine_id = machine_id; | |
3274 | strv_free_and_replace(m->machine_info, machine_info); | |
3275 | strv_free_and_replace(m->os_release, os_release); | |
7718ac97 | 3276 | strv_free_and_replace(m->extension_release, extension_release); |
a4e0d617 | 3277 | m->has_init_system = has_init_system; |
3b925504 LP |
3278 | |
3279 | finish: | |
67f63ee5 | 3280 | for (unsigned k = 0; k < n_meta_initialized; k++) |
3b925504 LP |
3281 | safe_close_pair(fds + 2*k); |
3282 | ||
3283 | return r; | |
3284 | } | |
3285 | ||
4526113f LP |
3286 | int dissect_image_and_warn( |
3287 | int fd, | |
3288 | const char *name, | |
89e62e0b | 3289 | const VeritySettings *verity, |
18d73705 | 3290 | const MountOptions *mount_options, |
a3642997 | 3291 | uint64_t diskseq, |
75dc190d | 3292 | uint64_t uevent_seqnum_not_before, |
4a62257d | 3293 | usec_t timestamp_not_before, |
4526113f LP |
3294 | DissectImageFlags flags, |
3295 | DissectedImage **ret) { | |
3296 | ||
3297 | _cleanup_free_ char *buffer = NULL; | |
3298 | int r; | |
3299 | ||
3300 | if (!name) { | |
3301 | r = fd_get_path(fd, &buffer); | |
3302 | if (r < 0) | |
3303 | return r; | |
3304 | ||
3305 | name = buffer; | |
3306 | } | |
3307 | ||
a3642997 | 3308 | r = dissect_image(fd, verity, mount_options, diskseq, uevent_seqnum_not_before, timestamp_not_before, flags, ret); |
4526113f LP |
3309 | switch (r) { |
3310 | ||
3311 | case -EOPNOTSUPP: | |
3312 | return log_error_errno(r, "Dissecting images is not supported, compiled without blkid support."); | |
3313 | ||
3314 | case -ENOPKG: | |
3315 | return log_error_errno(r, "Couldn't identify a suitable partition table or file system in '%s'.", name); | |
3316 | ||
3317 | case -EADDRNOTAVAIL: | |
3318 | return log_error_errno(r, "No root partition for specified root hash found in '%s'.", name); | |
3319 | ||
3320 | case -ENOTUNIQ: | |
3321 | return log_error_errno(r, "Multiple suitable root partitions found in image '%s'.", name); | |
3322 | ||
3323 | case -ENXIO: | |
3324 | return log_error_errno(r, "No suitable root partition found in image '%s'.", name); | |
3325 | ||
3326 | case -EPROTONOSUPPORT: | |
3327 | return log_error_errno(r, "Device '%s' is loopback block device with partition scanning turned off, please turn it on.", name); | |
3328 | ||
a94aa2b9 LP |
3329 | case -EBADR: |
3330 | return log_error_errno(r, | |
3331 | "Combining partitioned images (such as '%s') with external Verity data (such as '%s') not supported. " | |
3332 | "(Consider setting $SYSTEMD_DISSECT_VERITY_SIDECAR=0 to disable automatic discovery of external Verity data.)", | |
3333 | name, strna(verity ? verity->data_path : NULL)); | |
3334 | ||
3335 | case -ENOTBLK: | |
3336 | return log_error_errno(r, "Specified image '%s' is not a block device.", name); | |
3337 | ||
4526113f LP |
3338 | default: |
3339 | if (r < 0) | |
3340 | return log_error_errno(r, "Failed to dissect image '%s': %m", name); | |
3341 | ||
3342 | return r; | |
3343 | } | |
3344 | } | |
3345 | ||
49536766 LP |
3346 | bool dissected_image_verity_candidate(const DissectedImage *image, PartitionDesignator partition_designator) { |
3347 | assert(image); | |
3348 | ||
3349 | /* Checks if this partition could theoretically do Verity. For non-partitioned images this only works | |
3350 | * if there's an external verity file supplied, for which we can consult .has_verity. For partitioned | |
3351 | * images we only check the partition type. | |
3352 | * | |
3353 | * This call is used to decide whether to suppress or show a verity column in tabular output of the | |
3354 | * image. */ | |
3355 | ||
e7cbe5cb | 3356 | if (image->single_file_system) |
c3c88d67 | 3357 | return partition_designator == PARTITION_ROOT && image->has_verity; |
e7cbe5cb LB |
3358 | |
3359 | return PARTITION_VERITY_OF(partition_designator) >= 0; | |
3360 | } | |
3361 | ||
49536766 LP |
3362 | bool dissected_image_verity_ready(const DissectedImage *image, PartitionDesignator partition_designator) { |
3363 | PartitionDesignator k; | |
3364 | ||
3365 | assert(image); | |
3366 | ||
3367 | /* Checks if this partition has verity data available that we can activate. For non-partitioned this | |
3368 | * works for the root partition, for others only if the associated verity partition was found. */ | |
3369 | ||
3370 | if (!image->verity_ready) | |
3371 | return false; | |
e7cbe5cb LB |
3372 | |
3373 | if (image->single_file_system) | |
49536766 | 3374 | return partition_designator == PARTITION_ROOT; |
e7cbe5cb LB |
3375 | |
3376 | k = PARTITION_VERITY_OF(partition_designator); | |
3377 | return k >= 0 && image->partitions[k].found; | |
3378 | } | |
3379 | ||
8ee9615e LP |
3380 | bool dissected_image_verity_sig_ready(const DissectedImage *image, PartitionDesignator partition_designator) { |
3381 | PartitionDesignator k; | |
3382 | ||
3383 | assert(image); | |
3384 | ||
3385 | /* Checks if this partition has verity signature data available that we can use. */ | |
3386 | ||
3387 | if (!image->verity_sig_ready) | |
3388 | return false; | |
3389 | ||
3390 | if (image->single_file_system) | |
3391 | return partition_designator == PARTITION_ROOT; | |
3392 | ||
3393 | k = PARTITION_VERITY_SIG_OF(partition_designator); | |
3394 | return k >= 0 && image->partitions[k].found; | |
3395 | } | |
3396 | ||
18d73705 LB |
3397 | MountOptions* mount_options_free_all(MountOptions *options) { |
3398 | MountOptions *m; | |
3399 | ||
3400 | while ((m = options)) { | |
3401 | LIST_REMOVE(mount_options, options, m); | |
3402 | free(m->options); | |
3403 | free(m); | |
3404 | } | |
3405 | ||
3406 | return NULL; | |
3407 | } | |
3408 | ||
569a0e42 | 3409 | const char* mount_options_from_designator(const MountOptions *options, PartitionDesignator designator) { |
f5215bc8 | 3410 | const MountOptions *m; |
18d73705 | 3411 | |
f5215bc8 | 3412 | LIST_FOREACH(mount_options, m, options) |
9ece6444 | 3413 | if (designator == m->partition_designator && !isempty(m->options)) |
18d73705 | 3414 | return m->options; |
6aa05ebd | 3415 | |
18d73705 LB |
3416 | return NULL; |
3417 | } | |
3418 | ||
6aa05ebd LP |
3419 | int mount_image_privately_interactively( |
3420 | const char *image, | |
3421 | DissectImageFlags flags, | |
3422 | char **ret_directory, | |
3423 | LoopDevice **ret_loop_device, | |
3424 | DecryptedImage **ret_decrypted_image) { | |
3425 | ||
27ec815e | 3426 | _cleanup_(verity_settings_done) VeritySettings verity = VERITY_SETTINGS_DEFAULT; |
6aa05ebd LP |
3427 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; |
3428 | _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL; | |
3429 | _cleanup_(dissected_image_unrefp) DissectedImage *dissected_image = NULL; | |
3430 | _cleanup_(rmdir_and_freep) char *created_dir = NULL; | |
3431 | _cleanup_free_ char *temp = NULL; | |
3432 | int r; | |
3433 | ||
3434 | /* Mounts an OS image at a temporary place, inside a newly created mount namespace of our own. This | |
3435 | * is used by tools such as systemd-tmpfiles or systemd-firstboot to operate on some disk image | |
3436 | * easily. */ | |
3437 | ||
3438 | assert(image); | |
3439 | assert(ret_directory); | |
3440 | assert(ret_loop_device); | |
3441 | assert(ret_decrypted_image); | |
3442 | ||
27ec815e LP |
3443 | r = verity_settings_load(&verity, image, NULL, NULL); |
3444 | if (r < 0) | |
3445 | return log_error_errno(r, "Failed to load root hash data: %m"); | |
3446 | ||
6aa05ebd LP |
3447 | r = tempfn_random_child(NULL, program_invocation_short_name, &temp); |
3448 | if (r < 0) | |
3449 | return log_error_errno(r, "Failed to generate temporary mount directory: %m"); | |
3450 | ||
3451 | r = loop_device_make_by_path( | |
3452 | image, | |
ef9c184d | 3453 | FLAGS_SET(flags, DISSECT_IMAGE_DEVICE_READ_ONLY) ? O_RDONLY : O_RDWR, |
6aa05ebd LP |
3454 | FLAGS_SET(flags, DISSECT_IMAGE_NO_PARTITION_TABLE) ? 0 : LO_FLAGS_PARTSCAN, |
3455 | &d); | |
3456 | if (r < 0) | |
7b87fe4c | 3457 | return log_error_errno(r, "Failed to set up loopback device for %s: %m", image); |
6aa05ebd | 3458 | |
a3642997 | 3459 | r = dissect_image_and_warn(d->fd, image, &verity, NULL, d->diskseq, d->uevent_seqnum_not_before, d->timestamp_not_before, flags, &dissected_image); |
6aa05ebd LP |
3460 | if (r < 0) |
3461 | return r; | |
3462 | ||
88b3300f LP |
3463 | r = dissected_image_load_verity_sig_partition(dissected_image, d->fd, &verity); |
3464 | if (r < 0) | |
3465 | return r; | |
3466 | ||
27ec815e | 3467 | r = dissected_image_decrypt_interactively(dissected_image, NULL, &verity, flags, &decrypted_image); |
6aa05ebd LP |
3468 | if (r < 0) |
3469 | return r; | |
3470 | ||
3471 | r = detach_mount_namespace(); | |
3472 | if (r < 0) | |
3473 | return log_error_errno(r, "Failed to detach mount namespace: %m"); | |
3474 | ||
3475 | r = mkdir_p(temp, 0700); | |
3476 | if (r < 0) | |
3477 | return log_error_errno(r, "Failed to create mount point: %m"); | |
3478 | ||
3479 | created_dir = TAKE_PTR(temp); | |
3480 | ||
21b61b1d | 3481 | r = dissected_image_mount_and_warn(dissected_image, created_dir, UID_INVALID, UID_INVALID, flags); |
6aa05ebd | 3482 | if (r < 0) |
af187ab2 | 3483 | return r; |
6aa05ebd LP |
3484 | |
3485 | if (decrypted_image) { | |
3486 | r = decrypted_image_relinquish(decrypted_image); | |
3487 | if (r < 0) | |
3488 | return log_error_errno(r, "Failed to relinquish DM devices: %m"); | |
3489 | } | |
3490 | ||
3491 | loop_device_relinquish(d); | |
3492 | ||
3493 | *ret_directory = TAKE_PTR(created_dir); | |
3494 | *ret_loop_device = TAKE_PTR(d); | |
3495 | *ret_decrypted_image = TAKE_PTR(decrypted_image); | |
3496 | ||
3497 | return 0; | |
3498 | } | |
3499 | ||
8c1be37e LP |
3500 | static const char *const partition_designator_table[] = { |
3501 | [PARTITION_ROOT] = "root", | |
3502 | [PARTITION_ROOT_SECONDARY] = "root-secondary", | |
aee36b4e LP |
3503 | [PARTITION_USR] = "usr", |
3504 | [PARTITION_USR_SECONDARY] = "usr-secondary", | |
8c1be37e LP |
3505 | [PARTITION_HOME] = "home", |
3506 | [PARTITION_SRV] = "srv", | |
3507 | [PARTITION_ESP] = "esp", | |
a8c47660 | 3508 | [PARTITION_XBOOTLDR] = "xbootldr", |
8c1be37e | 3509 | [PARTITION_SWAP] = "swap", |
4623e8e6 LP |
3510 | [PARTITION_ROOT_VERITY] = "root-verity", |
3511 | [PARTITION_ROOT_SECONDARY_VERITY] = "root-secondary-verity", | |
aee36b4e LP |
3512 | [PARTITION_USR_VERITY] = "usr-verity", |
3513 | [PARTITION_USR_SECONDARY_VERITY] = "usr-secondary-verity", | |
8ee9615e LP |
3514 | [PARTITION_ROOT_VERITY_SIG] = "root-verity-sig", |
3515 | [PARTITION_ROOT_SECONDARY_VERITY_SIG] = "root-secondary-verity-sig", | |
3516 | [PARTITION_USR_VERITY_SIG] = "usr-verity-sig", | |
3517 | [PARTITION_USR_SECONDARY_VERITY_SIG] = "usr-secondary-verity-sig", | |
d4dffb85 LP |
3518 | [PARTITION_TMP] = "tmp", |
3519 | [PARTITION_VAR] = "var", | |
8c1be37e LP |
3520 | }; |
3521 | ||
93f59701 LB |
3522 | int verity_dissect_and_mount( |
3523 | const char *src, | |
3524 | const char *dest, | |
3525 | const MountOptions *options, | |
3526 | const char *required_host_os_release_id, | |
3527 | const char *required_host_os_release_version_id, | |
3528 | const char *required_host_os_release_sysext_level) { | |
3529 | ||
4beda316 LB |
3530 | _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL; |
3531 | _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL; | |
3532 | _cleanup_(dissected_image_unrefp) DissectedImage *dissected_image = NULL; | |
3533 | _cleanup_(verity_settings_done) VeritySettings verity = VERITY_SETTINGS_DEFAULT; | |
3534 | DissectImageFlags dissect_image_flags; | |
3535 | int r; | |
3536 | ||
3537 | assert(src); | |
3538 | assert(dest); | |
3539 | ||
3540 | r = verity_settings_load(&verity, src, NULL, NULL); | |
3541 | if (r < 0) | |
3542 | return log_debug_errno(r, "Failed to load root hash: %m"); | |
3543 | ||
3544 | dissect_image_flags = verity.data_path ? DISSECT_IMAGE_NO_PARTITION_TABLE : 0; | |
3545 | ||
3546 | r = loop_device_make_by_path( | |
3547 | src, | |
3548 | -1, | |
3549 | verity.data_path ? 0 : LO_FLAGS_PARTSCAN, | |
3550 | &loop_device); | |
3551 | if (r < 0) | |
3552 | return log_debug_errno(r, "Failed to create loop device for image: %m"); | |
3553 | ||
3554 | r = dissect_image( | |
3555 | loop_device->fd, | |
3556 | &verity, | |
3557 | options, | |
a3642997 | 3558 | loop_device->diskseq, |
75dc190d | 3559 | loop_device->uevent_seqnum_not_before, |
4a62257d | 3560 | loop_device->timestamp_not_before, |
4beda316 LB |
3561 | dissect_image_flags, |
3562 | &dissected_image); | |
3563 | /* No partition table? Might be a single-filesystem image, try again */ | |
3564 | if (!verity.data_path && r == -ENOPKG) | |
3565 | r = dissect_image( | |
3566 | loop_device->fd, | |
3567 | &verity, | |
3568 | options, | |
a3642997 | 3569 | loop_device->diskseq, |
75dc190d | 3570 | loop_device->uevent_seqnum_not_before, |
4a62257d | 3571 | loop_device->timestamp_not_before, |
75dc190d | 3572 | dissect_image_flags | DISSECT_IMAGE_NO_PARTITION_TABLE, |
4beda316 LB |
3573 | &dissected_image); |
3574 | if (r < 0) | |
3575 | return log_debug_errno(r, "Failed to dissect image: %m"); | |
3576 | ||
88b3300f LP |
3577 | r = dissected_image_load_verity_sig_partition(dissected_image, loop_device->fd, &verity); |
3578 | if (r < 0) | |
3579 | return r; | |
3580 | ||
4beda316 LB |
3581 | r = dissected_image_decrypt( |
3582 | dissected_image, | |
3583 | NULL, | |
3584 | &verity, | |
3585 | dissect_image_flags, | |
3586 | &decrypted_image); | |
3587 | if (r < 0) | |
3588 | return log_debug_errno(r, "Failed to decrypt dissected image: %m"); | |
3589 | ||
3590 | r = mkdir_p_label(dest, 0755); | |
3591 | if (r < 0) | |
3592 | return log_debug_errno(r, "Failed to create destination directory %s: %m", dest); | |
3593 | r = umount_recursive(dest, 0); | |
3594 | if (r < 0) | |
3595 | return log_debug_errno(r, "Failed to umount under destination directory %s: %m", dest); | |
3596 | ||
21b61b1d | 3597 | r = dissected_image_mount(dissected_image, dest, UID_INVALID, UID_INVALID, dissect_image_flags); |
4beda316 LB |
3598 | if (r < 0) |
3599 | return log_debug_errno(r, "Failed to mount image: %m"); | |
3600 | ||
93f59701 LB |
3601 | /* If we got os-release values from the caller, then we need to match them with the image's |
3602 | * extension-release.d/ content. Return -EINVAL if there's any mismatch. | |
3603 | * First, check the distro ID. If that matches, then check the new SYSEXT_LEVEL value if | |
3604 | * available, or else fallback to VERSION_ID. */ | |
3605 | if (required_host_os_release_id && | |
3606 | (required_host_os_release_version_id || required_host_os_release_sysext_level)) { | |
3607 | _cleanup_strv_free_ char **extension_release = NULL; | |
3608 | ||
3609 | r = load_extension_release_pairs(dest, dissected_image->image_name, &extension_release); | |
3610 | if (r < 0) | |
3611 | return log_debug_errno(r, "Failed to parse image %s extension-release metadata: %m", dissected_image->image_name); | |
3612 | ||
3613 | r = extension_release_validate( | |
3614 | dissected_image->image_name, | |
3615 | required_host_os_release_id, | |
3616 | required_host_os_release_version_id, | |
3617 | required_host_os_release_sysext_level, | |
3618 | extension_release); | |
3619 | if (r == 0) | |
3620 | return log_debug_errno(SYNTHETIC_ERRNO(ESTALE), "Image %s extension-release metadata does not match the root's", dissected_image->image_name); | |
3621 | if (r < 0) | |
3622 | return log_debug_errno(r, "Failed to compare image %s extension-release metadata with the root's os-release: %m", dissected_image->image_name); | |
3623 | } | |
3624 | ||
4beda316 LB |
3625 | if (decrypted_image) { |
3626 | r = decrypted_image_relinquish(decrypted_image); | |
3627 | if (r < 0) | |
3628 | return log_debug_errno(r, "Failed to relinquish decrypted image: %m"); | |
3629 | } | |
3630 | ||
3631 | loop_device_relinquish(loop_device); | |
3632 | ||
3633 | return 0; | |
3634 | } | |
3635 | ||
569a0e42 | 3636 | DEFINE_STRING_TABLE_LOOKUP(partition_designator, PartitionDesignator); |