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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 | |
3c1f2cee | 14 | #include "sd-device.h" |
dccca82b LP |
15 | #include "sd-id128.h" |
16 | ||
8c1be37e | 17 | #include "architecture.h" |
18b5886e | 18 | #include "ask-password-api.h" |
8c1be37e | 19 | #include "blkid-util.h" |
18c528e9 | 20 | #include "blockdev-util.h" |
3b925504 | 21 | #include "copy.h" |
1e2f3230 | 22 | #include "cryptsetup-util.h" |
3b925504 | 23 | #include "def.h" |
553e15f2 | 24 | #include "device-nodes.h" |
8437c059 | 25 | #include "device-util.h" |
7718ac97 | 26 | #include "discover-image.h" |
8c1be37e | 27 | #include "dissect-image.h" |
a709a315 | 28 | #include "dm-util.h" |
686d13b9 | 29 | #include "env-file.h" |
93f59701 | 30 | #include "extension-release.h" |
18b5886e | 31 | #include "fd-util.h" |
78ebe980 | 32 | #include "fileio.h" |
2eedfd2d | 33 | #include "fs-util.h" |
cf32c486 | 34 | #include "fsck-util.h" |
8c1be37e | 35 | #include "gpt.h" |
78ebe980 | 36 | #include "hexdecoct.h" |
e2054217 | 37 | #include "hostname-setup.h" |
3b925504 | 38 | #include "id128-util.h" |
593fe6c0 | 39 | #include "import-util.h" |
6aa05ebd | 40 | #include "mkdir.h" |
8c1be37e | 41 | #include "mount-util.h" |
e4de7287 | 42 | #include "mountpoint-util.h" |
6aa05ebd | 43 | #include "namespace-util.h" |
d8b4d14d | 44 | #include "nulstr-util.h" |
d58ad743 | 45 | #include "os-util.h" |
8c1be37e | 46 | #include "path-util.h" |
3b925504 LP |
47 | #include "process-util.h" |
48 | #include "raw-clone.h" | |
81939d9d | 49 | #include "resize-fs.h" |
3b925504 | 50 | #include "signal-util.h" |
8c1be37e | 51 | #include "stat-util.h" |
18b5886e | 52 | #include "stdio-util.h" |
8c1be37e LP |
53 | #include "string-table.h" |
54 | #include "string-util.h" | |
2eedfd2d | 55 | #include "strv.h" |
e4de7287 | 56 | #include "tmpfile-util.h" |
a8040b6d | 57 | #include "udev-util.h" |
2d3a5a73 | 58 | #include "user-util.h" |
41488e1f | 59 | #include "xattr-util.h" |
8c1be37e | 60 | |
28e2641a FF |
61 | /* how many times to wait for the device nodes to appear */ |
62 | #define N_DEVICE_NODE_LIST_ATTEMPTS 10 | |
63 | ||
c34b75a1 | 64 | int probe_filesystem(const char *node, char **ret_fstype) { |
7cc84b2c | 65 | /* Try to find device content type and return it in *ret_fstype. If nothing is found, |
5238e957 | 66 | * 0/NULL will be returned. -EUCLEAN will be returned for ambiguous results, and an |
7cc84b2c ZJS |
67 | * different error otherwise. */ |
68 | ||
349cc4a5 | 69 | #if HAVE_BLKID |
8e766630 | 70 | _cleanup_(blkid_free_probep) blkid_probe b = NULL; |
18b5886e LP |
71 | const char *fstype; |
72 | int r; | |
73 | ||
995fa2e5 | 74 | errno = 0; |
18b5886e LP |
75 | b = blkid_new_probe_from_filename(node); |
76 | if (!b) | |
66855de7 | 77 | return errno_or_else(ENOMEM); |
18b5886e LP |
78 | |
79 | blkid_probe_enable_superblocks(b, 1); | |
80 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE); | |
81 | ||
82 | errno = 0; | |
83 | r = blkid_do_safeprobe(b); | |
7cc84b2c ZJS |
84 | if (r == 1) { |
85 | log_debug("No type detected on partition %s", node); | |
18b5886e LP |
86 | goto not_found; |
87 | } | |
58dfbfbd LP |
88 | if (r == -2) |
89 | return log_debug_errno(SYNTHETIC_ERRNO(EUCLEAN), | |
90 | "Results ambiguous for partition %s", node); | |
b382db9f | 91 | if (r != 0) |
66855de7 | 92 | return errno_or_else(EIO); |
18b5886e LP |
93 | |
94 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
95 | ||
96 | if (fstype) { | |
97 | char *t; | |
98 | ||
99 | t = strdup(fstype); | |
100 | if (!t) | |
101 | return -ENOMEM; | |
102 | ||
103 | *ret_fstype = t; | |
104 | return 1; | |
105 | } | |
106 | ||
107 | not_found: | |
108 | *ret_fstype = NULL; | |
109 | return 0; | |
d1c536f5 ZJS |
110 | #else |
111 | return -EOPNOTSUPP; | |
a75e27eb | 112 | #endif |
d1c536f5 | 113 | } |
18b5886e | 114 | |
40c10d3f | 115 | #if HAVE_BLKID |
4ba86848 LP |
116 | static int enumerator_for_parent(sd_device *d, sd_device_enumerator **ret) { |
117 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
118 | int r; | |
aae22eb3 | 119 | |
f70e7f70 | 120 | assert(d); |
4ba86848 | 121 | assert(ret); |
f70e7f70 | 122 | |
4ba86848 LP |
123 | r = sd_device_enumerator_new(&e); |
124 | if (r < 0) | |
125 | return r; | |
3c1f2cee | 126 | |
210e1cd6 YW |
127 | r = sd_device_enumerator_add_match_subsystem(e, "block", true); |
128 | if (r < 0) | |
129 | return r; | |
130 | ||
4ba86848 LP |
131 | r = sd_device_enumerator_add_match_parent(e, d); |
132 | if (r < 0) | |
133 | return r; | |
134 | ||
210e1cd6 YW |
135 | r = sd_device_enumerator_add_match_sysattr(e, "partition", NULL, true); |
136 | if (r < 0) | |
137 | return r; | |
138 | ||
4ba86848 LP |
139 | *ret = TAKE_PTR(e); |
140 | return 0; | |
cde942f6 JPRV |
141 | } |
142 | ||
c1737506 LP |
143 | static int device_is_partition( |
144 | sd_device *d, | |
145 | sd_device *expected_parent, | |
146 | blkid_partition pp) { | |
147 | ||
0a8f9bc6 | 148 | const char *v, *parent_syspath, *expected_parent_syspath; |
4ba86848 LP |
149 | blkid_loff_t bsize, bstart; |
150 | uint64_t size, start; | |
151 | int partno, bpartno, r; | |
0a8f9bc6 | 152 | sd_device *parent; |
aae22eb3 | 153 | |
f70e7f70 | 154 | assert(d); |
0a8f9bc6 | 155 | assert(expected_parent); |
4ba86848 | 156 | assert(pp); |
f70e7f70 | 157 | |
11368b69 | 158 | r = sd_device_get_subsystem(d, &v); |
4ba86848 LP |
159 | if (r < 0) |
160 | return r; | |
11368b69 YW |
161 | if (!streq(v, "block")) |
162 | return false; | |
163 | ||
164 | if (sd_device_get_devtype(d, &v) < 0 || !streq(v, "partition")) | |
aae22eb3 LP |
165 | return false; |
166 | ||
0a8f9bc6 YW |
167 | r = sd_device_get_parent(d, &parent); |
168 | if (r < 0) | |
169 | return false; /* Doesn't have a parent? No relevant to us */ | |
170 | ||
171 | r = sd_device_get_syspath(parent, &parent_syspath); /* Check parent of device of this action */ | |
172 | if (r < 0) | |
173 | return r; | |
174 | ||
175 | r = sd_device_get_syspath(expected_parent, &expected_parent_syspath); /* Check parent of device we are looking for */ | |
176 | if (r < 0) | |
177 | return r; | |
178 | ||
179 | if (!path_equal(parent_syspath, expected_parent_syspath)) | |
180 | return false; /* Has a different parent than what we need, not interesting to us */ | |
181 | ||
7d25c246 LP |
182 | /* On kernel uevents we may find the partition number in the PARTN= field. Let's use that preferably, |
183 | * since it's cheaper and more importantly: the sysfs attribute "partition" appears to become | |
c1737506 LP |
184 | * available late, hence let's use the property instead, which is available at the moment we see the |
185 | * uevent. */ | |
186 | r = sd_device_get_property_value(d, "PARTN", &v); | |
187 | if (r == -ENOENT) | |
188 | r = sd_device_get_sysattr_value(d, "partition", &v); | |
4ba86848 LP |
189 | if (r < 0) |
190 | return r; | |
c1737506 | 191 | |
4ba86848 LP |
192 | r = safe_atoi(v, &partno); |
193 | if (r < 0) | |
194 | return r; | |
ea887be0 | 195 | |
4ba86848 LP |
196 | errno = 0; |
197 | bpartno = blkid_partition_get_partno(pp); | |
198 | if (bpartno < 0) | |
199 | return errno_or_else(EIO); | |
ea887be0 | 200 | |
4ba86848 LP |
201 | if (partno != bpartno) |
202 | return false; | |
f70e7f70 | 203 | |
4ba86848 | 204 | r = sd_device_get_sysattr_value(d, "start", &v); |
ea887be0 ZJS |
205 | if (r < 0) |
206 | return r; | |
4ba86848 | 207 | r = safe_atou64(v, &start); |
ea887be0 ZJS |
208 | if (r < 0) |
209 | return r; | |
210 | ||
4ba86848 LP |
211 | errno = 0; |
212 | bstart = blkid_partition_get_start(pp); | |
213 | if (bstart < 0) | |
214 | return errno_or_else(EIO); | |
215 | ||
216 | if (start != (uint64_t) bstart) | |
217 | return false; | |
218 | ||
219 | r = sd_device_get_sysattr_value(d, "size", &v); | |
220 | if (r < 0) | |
221 | return r; | |
222 | r = safe_atou64(v, &size); | |
ea887be0 ZJS |
223 | if (r < 0) |
224 | return r; | |
225 | ||
4ba86848 LP |
226 | errno = 0; |
227 | bsize = blkid_partition_get_size(pp); | |
228 | if (bsize < 0) | |
229 | return errno_or_else(EIO); | |
230 | ||
231 | if (size != (uint64_t) bsize) | |
232 | return false; | |
233 | ||
234 | return true; | |
ea887be0 ZJS |
235 | } |
236 | ||
4ba86848 LP |
237 | static int find_partition( |
238 | sd_device *parent, | |
239 | blkid_partition pp, | |
4a62257d | 240 | usec_t timestamp_not_before, |
4ba86848 | 241 | sd_device **ret) { |
ea887be0 ZJS |
242 | |
243 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; | |
244 | sd_device *q; | |
ea887be0 ZJS |
245 | int r; |
246 | ||
4ba86848 LP |
247 | assert(parent); |
248 | assert(pp); | |
249 | assert(ret); | |
f70e7f70 | 250 | |
4ba86848 | 251 | r = enumerator_for_parent(parent, &e); |
ea887be0 ZJS |
252 | if (r < 0) |
253 | return r; | |
254 | ||
ea887be0 | 255 | FOREACH_DEVICE(e, q) { |
4a62257d LP |
256 | uint64_t usec; |
257 | ||
258 | r = sd_device_get_usec_initialized(q, &usec); | |
259 | if (r == -EBUSY) /* Not initialized yet */ | |
260 | continue; | |
261 | if (r < 0) | |
262 | return r; | |
263 | ||
264 | if (timestamp_not_before != USEC_INFINITY && | |
265 | usec < timestamp_not_before) /* udev database entry older than our attachment? Then it's not ours */ | |
266 | continue; | |
267 | ||
0a8f9bc6 | 268 | r = device_is_partition(q, parent, pp); |
4ba86848 LP |
269 | if (r < 0) |
270 | return r; | |
271 | if (r > 0) { | |
272 | *ret = sd_device_ref(q); | |
273 | return 0; | |
052eaf5c | 274 | } |
ea887be0 ZJS |
275 | } |
276 | ||
4ba86848 LP |
277 | return -ENXIO; |
278 | } | |
10c1b188 | 279 | |
4ba86848 LP |
280 | struct wait_data { |
281 | sd_device *parent_device; | |
282 | blkid_partition blkidp; | |
283 | sd_device *found; | |
75dc190d | 284 | uint64_t uevent_seqnum_not_before; |
4ba86848 | 285 | }; |
ea887be0 | 286 | |
4ba86848 LP |
287 | static inline void wait_data_done(struct wait_data *d) { |
288 | sd_device_unref(d->found); | |
289 | } | |
ea887be0 | 290 | |
4ba86848 | 291 | static int device_monitor_handler(sd_device_monitor *monitor, sd_device *device, void *userdata) { |
4ba86848 | 292 | struct wait_data *w = userdata; |
4ba86848 LP |
293 | int r; |
294 | ||
295 | assert(w); | |
296 | ||
a1130022 | 297 | if (device_for_action(device, SD_DEVICE_REMOVE)) |
4ba86848 LP |
298 | return 0; |
299 | ||
75dc190d LP |
300 | if (w->uevent_seqnum_not_before != UINT64_MAX) { |
301 | uint64_t seqnum; | |
302 | ||
303 | r = sd_device_get_seqnum(device, &seqnum); | |
304 | if (r < 0) | |
305 | goto finish; | |
306 | ||
307 | if (seqnum <= w->uevent_seqnum_not_before) { /* From an older use of this loop device */ | |
308 | log_debug("Dropping event because seqnum too old (%" PRIu64 " <= %" PRIu64 ")", | |
309 | seqnum, w->uevent_seqnum_not_before); | |
310 | return 0; | |
311 | } | |
312 | } | |
313 | ||
0a8f9bc6 | 314 | r = device_is_partition(device, w->parent_device, w->blkidp); |
4ba86848 LP |
315 | if (r < 0) |
316 | goto finish; | |
317 | if (r == 0) /* Not the one we need */ | |
318 | return 0; | |
319 | ||
320 | /* It's the one we need! Yay! */ | |
321 | assert(!w->found); | |
322 | w->found = sd_device_ref(device); | |
323 | r = 0; | |
324 | ||
325 | finish: | |
326 | return sd_event_exit(sd_device_monitor_get_event(monitor), r); | |
ea887be0 ZJS |
327 | } |
328 | ||
4ba86848 LP |
329 | static int wait_for_partition_device( |
330 | sd_device *parent, | |
331 | blkid_partition pp, | |
332 | usec_t deadline, | |
75dc190d | 333 | uint64_t uevent_seqnum_not_before, |
4a62257d | 334 | usec_t timestamp_not_before, |
4ba86848 LP |
335 | sd_device **ret) { |
336 | ||
337 | _cleanup_(sd_event_source_unrefp) sd_event_source *timeout_source = NULL; | |
338 | _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor = NULL; | |
339 | _cleanup_(sd_event_unrefp) sd_event *event = NULL; | |
ea887be0 ZJS |
340 | int r; |
341 | ||
4ba86848 LP |
342 | assert(parent); |
343 | assert(pp); | |
344 | assert(ret); | |
345 | ||
4a62257d | 346 | r = find_partition(parent, pp, timestamp_not_before, ret); |
4ba86848 LP |
347 | if (r != -ENXIO) |
348 | return r; | |
349 | ||
350 | r = sd_event_new(&event); | |
351 | if (r < 0) | |
352 | return r; | |
353 | ||
354 | r = sd_device_monitor_new(&monitor); | |
355 | if (r < 0) | |
356 | return r; | |
357 | ||
358 | r = sd_device_monitor_filter_add_match_subsystem_devtype(monitor, "block", "partition"); | |
359 | if (r < 0) | |
360 | return r; | |
361 | ||
210e1cd6 YW |
362 | r = sd_device_monitor_filter_add_match_parent(monitor, parent, true); |
363 | if (r < 0) | |
364 | return r; | |
365 | ||
366 | r = sd_device_monitor_filter_add_match_sysattr(monitor, "partition", NULL, true); | |
367 | if (r < 0) | |
368 | return r; | |
369 | ||
4ba86848 LP |
370 | r = sd_device_monitor_attach_event(monitor, event); |
371 | if (r < 0) | |
372 | return r; | |
373 | ||
374 | _cleanup_(wait_data_done) struct wait_data w = { | |
375 | .parent_device = parent, | |
376 | .blkidp = pp, | |
75dc190d | 377 | .uevent_seqnum_not_before = uevent_seqnum_not_before, |
4ba86848 | 378 | }; |
f70e7f70 | 379 | |
4ba86848 LP |
380 | r = sd_device_monitor_start(monitor, device_monitor_handler, &w); |
381 | if (r < 0) | |
382 | return r; | |
a8040b6d | 383 | |
4ba86848 | 384 | /* Check again, the partition might have appeared in the meantime */ |
4a62257d | 385 | r = find_partition(parent, pp, timestamp_not_before, ret); |
4ba86848 LP |
386 | if (r != -ENXIO) |
387 | return r; | |
388 | ||
389 | if (deadline != USEC_INFINITY) { | |
390 | r = sd_event_add_time( | |
391 | event, &timeout_source, | |
392 | CLOCK_MONOTONIC, deadline, 0, | |
393 | NULL, INT_TO_PTR(-ETIMEDOUT)); | |
394 | if (r < 0) | |
ea887be0 ZJS |
395 | return r; |
396 | } | |
397 | ||
4ba86848 LP |
398 | r = sd_event_loop(event); |
399 | if (r < 0) | |
400 | return r; | |
401 | ||
402 | assert(w.found); | |
403 | *ret = TAKE_PTR(w.found); | |
404 | return 0; | |
ea887be0 ZJS |
405 | } |
406 | ||
0f7c9a3d LP |
407 | static void check_partition_flags( |
408 | const char *node, | |
409 | unsigned long long pflags, | |
410 | unsigned long long supported) { | |
411 | ||
412 | assert(node); | |
413 | ||
414 | /* Mask away all flags supported by this partition's type and the three flags the UEFI spec defines generically */ | |
415 | pflags &= ~(supported | GPT_FLAG_REQUIRED_PARTITION | GPT_FLAG_NO_BLOCK_IO_PROTOCOL | GPT_FLAG_LEGACY_BIOS_BOOTABLE); | |
416 | ||
417 | if (pflags == 0) | |
418 | return; | |
419 | ||
420 | /* If there are other bits set, then log about it, to make things discoverable */ | |
421 | for (unsigned i = 0; i < sizeof(pflags) * 8; i++) { | |
422 | unsigned long long bit = 1ULL << i; | |
423 | if (!FLAGS_SET(pflags, bit)) | |
424 | continue; | |
425 | ||
426 | log_debug("Unexpected partition flag %llu set on %s!", bit, node); | |
427 | } | |
428 | } | |
429 | ||
786e3a52 LP |
430 | static int device_wait_for_initialization_harder( |
431 | sd_device *device, | |
432 | const char *subsystem, | |
433 | usec_t deadline, | |
434 | sd_device **ret) { | |
435 | ||
786e3a52 LP |
436 | usec_t start, left, retrigger_timeout; |
437 | int r; | |
438 | ||
439 | start = now(CLOCK_MONOTONIC); | |
440 | left = usec_sub_unsigned(deadline, start); | |
441 | ||
442 | if (DEBUG_LOGGING) { | |
443 | char buf[FORMAT_TIMESPAN_MAX]; | |
444 | const char *sn = NULL; | |
445 | ||
446 | (void) sd_device_get_sysname(device, &sn); | |
b64c4ece LP |
447 | log_device_debug(device, |
448 | "Waiting for device '%s' to initialize for %s.", strna(sn), format_timespan(buf, sizeof(buf), left, 0)); | |
786e3a52 LP |
449 | } |
450 | ||
451 | if (left != USEC_INFINITY) | |
452 | 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 */ | |
453 | else | |
454 | retrigger_timeout = 2 * USEC_PER_SEC; | |
455 | ||
456 | for (;;) { | |
457 | usec_t local_deadline, n; | |
458 | bool last_try; | |
459 | ||
460 | n = now(CLOCK_MONOTONIC); | |
461 | assert(n >= start); | |
462 | ||
463 | /* Find next deadline, when we'll retrigger */ | |
464 | local_deadline = start + | |
465 | DIV_ROUND_UP(n - start, retrigger_timeout) * retrigger_timeout; | |
466 | ||
467 | if (deadline != USEC_INFINITY && deadline <= local_deadline) { | |
468 | local_deadline = deadline; | |
469 | last_try = true; | |
470 | } else | |
471 | last_try = false; | |
472 | ||
473 | r = device_wait_for_initialization(device, subsystem, local_deadline, ret); | |
474 | if (r >= 0 && DEBUG_LOGGING) { | |
475 | char buf[FORMAT_TIMESPAN_MAX]; | |
476 | const char *sn = NULL; | |
477 | ||
478 | (void) sd_device_get_sysname(device, &sn); | |
b64c4ece LP |
479 | log_device_debug(device, |
480 | "Successfully waited for device '%s' to initialize for %s.", | |
481 | strna(sn), | |
482 | format_timespan(buf, sizeof(buf), usec_sub_unsigned(now(CLOCK_MONOTONIC), start), 0)); | |
786e3a52 LP |
483 | |
484 | } | |
485 | if (r != -ETIMEDOUT || last_try) | |
486 | return r; | |
487 | ||
786e3a52 LP |
488 | if (DEBUG_LOGGING) { |
489 | char buf[FORMAT_TIMESPAN_MAX]; | |
490 | ||
b64c4ece LP |
491 | log_device_debug(device, |
492 | "Device didn't initialize within %s, assuming lost event. Retriggering device.", | |
493 | format_timespan(buf, sizeof(buf), usec_sub_unsigned(now(CLOCK_MONOTONIC), start), 0)); | |
786e3a52 LP |
494 | } |
495 | ||
b64c4ece | 496 | r = sd_device_trigger(device, SD_DEVICE_CHANGE); |
786e3a52 LP |
497 | if (r < 0) |
498 | return r; | |
499 | } | |
500 | } | |
40c10d3f | 501 | #endif |
aae22eb3 | 502 | |
4ba86848 LP |
503 | #define DEVICE_TIMEOUT_USEC (45 * USEC_PER_SEC) |
504 | ||
08fe0a53 LP |
505 | static void dissected_partition_done(DissectedPartition *p) { |
506 | assert(p); | |
507 | ||
508 | free(p->fstype); | |
509 | free(p->node); | |
510 | free(p->label); | |
511 | free(p->decrypted_fstype); | |
512 | free(p->decrypted_node); | |
513 | free(p->mount_options); | |
514 | ||
515 | *p = (DissectedPartition) { | |
516 | .partno = -1, | |
517 | .architecture = -1 | |
518 | }; | |
519 | } | |
520 | ||
4526113f LP |
521 | int dissect_image( |
522 | int fd, | |
89e62e0b | 523 | const VeritySettings *verity, |
18d73705 | 524 | const MountOptions *mount_options, |
75dc190d | 525 | uint64_t uevent_seqnum_not_before, |
4a62257d | 526 | usec_t timestamp_not_before, |
4526113f LP |
527 | DissectImageFlags flags, |
528 | DissectedImage **ret) { | |
8c1be37e | 529 | |
349cc4a5 | 530 | #if HAVE_BLKID |
62ea0ed0 LP |
531 | #ifdef GPT_ROOT_NATIVE |
532 | sd_id128_t root_uuid = SD_ID128_NULL, root_verity_uuid = SD_ID128_NULL; | |
533 | #endif | |
534 | #ifdef GPT_USR_NATIVE | |
535 | sd_id128_t usr_uuid = SD_ID128_NULL, usr_verity_uuid = SD_ID128_NULL; | |
536 | #endif | |
1f8fb21c | 537 | bool is_gpt, is_mbr, multiple_generic = false, |
de98f631 LP |
538 | generic_rw = false, /* initialize to appease gcc */ |
539 | generic_growfs = false; | |
3c1f2cee | 540 | _cleanup_(sd_device_unrefp) sd_device *d = NULL; |
8c1be37e | 541 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; |
8e766630 | 542 | _cleanup_(blkid_free_probep) blkid_probe b = NULL; |
8c1be37e | 543 | _cleanup_free_ char *generic_node = NULL; |
be30ad41 | 544 | sd_id128_t generic_uuid = SD_ID128_NULL; |
593fe6c0 | 545 | const char *pttype = NULL, *sysname = NULL; |
8c1be37e | 546 | blkid_partlist pl; |
1f8fb21c | 547 | int r, generic_nr = -1, n_partitions; |
8c1be37e | 548 | struct stat st; |
4ba86848 | 549 | usec_t deadline; |
8c1be37e LP |
550 | |
551 | assert(fd >= 0); | |
552 | assert(ret); | |
89e62e0b | 553 | assert(!verity || verity->root_hash || verity->root_hash_size == 0); |
e7cbe5cb | 554 | assert(!((flags & DISSECT_IMAGE_GPT_ONLY) && (flags & DISSECT_IMAGE_NO_PARTITION_TABLE))); |
8c1be37e LP |
555 | |
556 | /* Probes a disk image, and returns information about what it found in *ret. | |
557 | * | |
4623e8e6 | 558 | * Returns -ENOPKG if no suitable partition table or file system could be found. |
2679f407 LP |
559 | * Returns -EADDRNOTAVAIL if a root hash was specified but no matching root/verity partitions found. |
560 | * Returns -ENXIO if we couldn't find any partition suitable as root or /usr partition | |
561 | * Returns -ENOTUNIQ if we only found multiple generic partitions and thus don't know what to do with that */ | |
4623e8e6 | 562 | |
89e62e0b | 563 | if (verity && verity->root_hash) { |
aee36b4e LP |
564 | sd_id128_t fsuuid, vuuid; |
565 | ||
566 | /* If a root hash is supplied, then we use the root partition that has a UUID that match the | |
567 | * first 128bit of the root hash. And we use the verity partition that has a UUID that match | |
568 | * the final 128bit. */ | |
4623e8e6 | 569 | |
89e62e0b | 570 | if (verity->root_hash_size < sizeof(sd_id128_t)) |
4623e8e6 LP |
571 | return -EINVAL; |
572 | ||
aee36b4e LP |
573 | memcpy(&fsuuid, verity->root_hash, sizeof(sd_id128_t)); |
574 | memcpy(&vuuid, (const uint8_t*) verity->root_hash + verity->root_hash_size - sizeof(sd_id128_t), sizeof(sd_id128_t)); | |
4623e8e6 | 575 | |
aee36b4e | 576 | if (sd_id128_is_null(fsuuid)) |
4623e8e6 | 577 | return -EINVAL; |
aee36b4e | 578 | if (sd_id128_is_null(vuuid)) |
4623e8e6 | 579 | return -EINVAL; |
aee36b4e LP |
580 | |
581 | /* If the verity data declares it's for the /usr partition, then search for that, in all | |
582 | * other cases assume it's for the root partition. */ | |
62ea0ed0 | 583 | #ifdef GPT_USR_NATIVE |
aee36b4e LP |
584 | if (verity->designator == PARTITION_USR) { |
585 | usr_uuid = fsuuid; | |
586 | usr_verity_uuid = vuuid; | |
587 | } else { | |
62ea0ed0 LP |
588 | #endif |
589 | #ifdef GPT_ROOT_NATIVE | |
aee36b4e LP |
590 | root_uuid = fsuuid; |
591 | root_verity_uuid = vuuid; | |
62ea0ed0 LP |
592 | #endif |
593 | #ifdef GPT_USR_NATIVE | |
aee36b4e | 594 | } |
62ea0ed0 | 595 | #endif |
4623e8e6 | 596 | } |
8c1be37e LP |
597 | |
598 | if (fstat(fd, &st) < 0) | |
599 | return -errno; | |
600 | ||
601 | if (!S_ISBLK(st.st_mode)) | |
602 | return -ENOTBLK; | |
603 | ||
930aa88f | 604 | r = sd_device_new_from_stat_rdev(&d, &st); |
6c544d14 LP |
605 | if (r < 0) |
606 | return r; | |
607 | ||
608 | if (!FLAGS_SET(flags, DISSECT_IMAGE_NO_UDEV)) { | |
609 | _cleanup_(sd_device_unrefp) sd_device *initialized = NULL; | |
610 | ||
611 | /* If udev support is enabled, then let's wait for the device to be initialized before we doing anything. */ | |
612 | ||
786e3a52 LP |
613 | r = device_wait_for_initialization_harder( |
614 | d, | |
615 | "block", | |
616 | usec_add(now(CLOCK_MONOTONIC), DEVICE_TIMEOUT_USEC), | |
617 | &initialized); | |
6c544d14 LP |
618 | if (r < 0) |
619 | return r; | |
620 | ||
621 | sd_device_unref(d); | |
622 | d = TAKE_PTR(initialized); | |
623 | } | |
624 | ||
8c1be37e LP |
625 | b = blkid_new_probe(); |
626 | if (!b) | |
627 | return -ENOMEM; | |
628 | ||
629 | errno = 0; | |
630 | r = blkid_probe_set_device(b, fd, 0, 0); | |
b382db9f | 631 | if (r != 0) |
66855de7 | 632 | return errno_or_else(ENOMEM); |
8c1be37e | 633 | |
9b6deb03 LP |
634 | if ((flags & DISSECT_IMAGE_GPT_ONLY) == 0) { |
635 | /* Look for file system superblocks, unless we only shall look for GPT partition tables */ | |
636 | blkid_probe_enable_superblocks(b, 1); | |
637 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE|BLKID_SUBLKS_USAGE); | |
638 | } | |
639 | ||
8c1be37e LP |
640 | blkid_probe_enable_partitions(b, 1); |
641 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
642 | ||
643 | errno = 0; | |
644 | r = blkid_do_safeprobe(b); | |
59ba6d0c LP |
645 | if (IN_SET(r, -2, 1)) |
646 | return log_debug_errno(SYNTHETIC_ERRNO(ENOPKG), "Failed to identify any partition table."); | |
b382db9f | 647 | if (r != 0) |
66855de7 | 648 | return errno_or_else(EIO); |
8c1be37e LP |
649 | |
650 | m = new0(DissectedImage, 1); | |
651 | if (!m) | |
652 | return -ENOMEM; | |
653 | ||
593fe6c0 LB |
654 | r = sd_device_get_sysname(d, &sysname); |
655 | if (r < 0) | |
656 | return log_debug_errno(r, "Failed to get device sysname: %m"); | |
657 | if (startswith(sysname, "loop")) { | |
658 | _cleanup_free_ char *name_stripped = NULL; | |
659 | const char *full_path; | |
660 | ||
661 | r = sd_device_get_sysattr_value(d, "loop/backing_file", &full_path); | |
662 | if (r < 0) | |
663 | log_debug_errno(r, "Failed to lookup image name via loop device backing file sysattr, ignoring: %m"); | |
664 | else { | |
665 | r = raw_strip_suffixes(basename(full_path), &name_stripped); | |
666 | if (r < 0) | |
667 | return r; | |
668 | } | |
669 | ||
670 | free_and_replace(m->image_name, name_stripped); | |
671 | } else { | |
672 | r = free_and_strdup(&m->image_name, sysname); | |
673 | if (r < 0) | |
674 | return r; | |
675 | } | |
676 | ||
677 | if (!image_name_is_valid(m->image_name)) { | |
678 | log_debug("Image name %s is not valid, ignoring", strempty(m->image_name)); | |
679 | m->image_name = mfree(m->image_name); | |
680 | } | |
681 | ||
e7cbe5cb | 682 | if ((!(flags & DISSECT_IMAGE_GPT_ONLY) && |
4b5de5dd | 683 | (flags & DISSECT_IMAGE_GENERIC_ROOT)) || |
e7cbe5cb | 684 | (flags & DISSECT_IMAGE_NO_PARTITION_TABLE)) { |
9b6deb03 | 685 | const char *usage = NULL; |
8c1be37e | 686 | |
aee36b4e LP |
687 | /* If flags permit this, also allow using non-partitioned single-filesystem images */ |
688 | ||
9b6deb03 LP |
689 | (void) blkid_probe_lookup_value(b, "USAGE", &usage, NULL); |
690 | if (STRPTR_IN_SET(usage, "filesystem", "crypto")) { | |
6c544d14 | 691 | const char *fstype = NULL, *options = NULL, *devname = NULL; |
18d73705 | 692 | _cleanup_free_ char *t = NULL, *n = NULL, *o = NULL; |
8c1be37e | 693 | |
9b6deb03 LP |
694 | /* OK, we have found a file system, that's our root partition then. */ |
695 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
8c1be37e | 696 | |
9b6deb03 LP |
697 | if (fstype) { |
698 | t = strdup(fstype); | |
699 | if (!t) | |
700 | return -ENOMEM; | |
701 | } | |
702 | ||
6c544d14 | 703 | r = sd_device_get_devname(d, &devname); |
54b22b26 LP |
704 | if (r < 0) |
705 | return r; | |
8c1be37e | 706 | |
6c544d14 LP |
707 | n = strdup(devname); |
708 | if (!n) | |
709 | return -ENOMEM; | |
710 | ||
e7cbe5cb | 711 | m->single_file_system = true; |
aee36b4e | 712 | m->verity = verity && verity->root_hash && verity->data_path && (verity->designator < 0 || verity->designator == PARTITION_ROOT); |
89e62e0b | 713 | m->can_verity = verity && verity->data_path; |
e7cbe5cb | 714 | |
f5215bc8 | 715 | options = mount_options_from_designator(mount_options, PARTITION_ROOT); |
18d73705 LB |
716 | if (options) { |
717 | o = strdup(options); | |
718 | if (!o) | |
719 | return -ENOMEM; | |
720 | } | |
721 | ||
9b6deb03 LP |
722 | m->partitions[PARTITION_ROOT] = (DissectedPartition) { |
723 | .found = true, | |
e7cbe5cb | 724 | .rw = !m->verity, |
9b6deb03 LP |
725 | .partno = -1, |
726 | .architecture = _ARCHITECTURE_INVALID, | |
1cc6c93a YW |
727 | .fstype = TAKE_PTR(t), |
728 | .node = TAKE_PTR(n), | |
18d73705 | 729 | .mount_options = TAKE_PTR(o), |
9b6deb03 | 730 | }; |
8c1be37e | 731 | |
4db1879a | 732 | m->encrypted = streq_ptr(fstype, "crypto_LUKS"); |
18b5886e | 733 | |
1cc6c93a | 734 | *ret = TAKE_PTR(m); |
9b6deb03 LP |
735 | return 0; |
736 | } | |
8c1be37e LP |
737 | } |
738 | ||
739 | (void) blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL); | |
740 | if (!pttype) | |
741 | return -ENOPKG; | |
742 | ||
743 | is_gpt = streq_ptr(pttype, "gpt"); | |
744 | is_mbr = streq_ptr(pttype, "dos"); | |
745 | ||
9b6deb03 | 746 | if (!is_gpt && ((flags & DISSECT_IMAGE_GPT_ONLY) || !is_mbr)) |
8c1be37e LP |
747 | return -ENOPKG; |
748 | ||
4ba86848 LP |
749 | /* Safety check: refuse block devices that carry a partition table but for which the kernel doesn't |
750 | * do partition scanning. */ | |
751 | r = blockdev_partscan_enabled(fd); | |
752 | if (r < 0) | |
753 | return r; | |
754 | if (r == 0) | |
755 | return -EPROTONOSUPPORT; | |
756 | ||
8c1be37e LP |
757 | errno = 0; |
758 | pl = blkid_probe_get_partitions(b); | |
b382db9f | 759 | if (!pl) |
66855de7 | 760 | return errno_or_else(ENOMEM); |
8c1be37e | 761 | |
4ba86848 LP |
762 | errno = 0; |
763 | n_partitions = blkid_partlist_numof_partitions(pl); | |
764 | if (n_partitions < 0) | |
765 | return errno_or_else(EIO); | |
8c1be37e | 766 | |
4ba86848 LP |
767 | deadline = usec_add(now(CLOCK_MONOTONIC), DEVICE_TIMEOUT_USEC); |
768 | for (int i = 0; i < n_partitions; i++) { | |
769 | _cleanup_(sd_device_unrefp) sd_device *q = NULL; | |
9b6deb03 | 770 | unsigned long long pflags; |
8c1be37e | 771 | blkid_partition pp; |
cde942f6 | 772 | const char *node; |
8c1be37e LP |
773 | int nr; |
774 | ||
4ba86848 LP |
775 | errno = 0; |
776 | pp = blkid_partlist_get_partition(pl, i); | |
777 | if (!pp) | |
778 | return errno_or_else(EIO); | |
aae22eb3 | 779 | |
4a62257d | 780 | r = wait_for_partition_device(d, pp, deadline, uevent_seqnum_not_before, timestamp_not_before, &q); |
4ba86848 LP |
781 | if (r < 0) |
782 | return r; | |
7be1420f | 783 | |
3c1f2cee YW |
784 | r = sd_device_get_devname(q, &node); |
785 | if (r < 0) | |
4ba86848 | 786 | return r; |
8c1be37e | 787 | |
9b6deb03 | 788 | pflags = blkid_partition_get_flags(pp); |
8c1be37e | 789 | |
4ba86848 | 790 | errno = 0; |
8c1be37e LP |
791 | nr = blkid_partition_get_partno(pp); |
792 | if (nr < 0) | |
4ba86848 | 793 | return errno_or_else(EIO); |
8c1be37e LP |
794 | |
795 | if (is_gpt) { | |
569a0e42 LP |
796 | PartitionDesignator designator = _PARTITION_DESIGNATOR_INVALID; |
797 | int architecture = _ARCHITECTURE_INVALID; | |
08fe0a53 | 798 | const char *stype, *sid, *fstype = NULL, *label; |
4623e8e6 | 799 | sd_id128_t type_id, id; |
de98f631 | 800 | bool rw = true, growfs = false; |
8c1be37e | 801 | |
4623e8e6 LP |
802 | sid = blkid_partition_get_uuid(pp); |
803 | if (!sid) | |
804 | continue; | |
805 | if (sd_id128_from_string(sid, &id) < 0) | |
806 | continue; | |
807 | ||
8c1be37e LP |
808 | stype = blkid_partition_get_type_string(pp); |
809 | if (!stype) | |
810 | continue; | |
8c1be37e LP |
811 | if (sd_id128_from_string(stype, &type_id) < 0) |
812 | continue; | |
813 | ||
08fe0a53 LP |
814 | label = blkid_partition_get_name(pp); /* libblkid returns NULL here if empty */ |
815 | ||
8c1be37e | 816 | if (sd_id128_equal(type_id, GPT_HOME)) { |
a48dd347 | 817 | |
de98f631 | 818 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 819 | |
a48dd347 LP |
820 | if (pflags & GPT_FLAG_NO_AUTO) |
821 | continue; | |
822 | ||
8c1be37e | 823 | designator = PARTITION_HOME; |
9b6deb03 | 824 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
de98f631 | 825 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e | 826 | |
8c1be37e | 827 | } else if (sd_id128_equal(type_id, GPT_SRV)) { |
a48dd347 | 828 | |
de98f631 | 829 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 830 | |
a48dd347 LP |
831 | if (pflags & GPT_FLAG_NO_AUTO) |
832 | continue; | |
833 | ||
8c1be37e | 834 | designator = PARTITION_SRV; |
9b6deb03 | 835 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
de98f631 | 836 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e | 837 | |
8c1be37e | 838 | } else if (sd_id128_equal(type_id, GPT_ESP)) { |
a48dd347 | 839 | |
aee36b4e LP |
840 | /* Note that we don't check the GPT_FLAG_NO_AUTO flag for the ESP, as it is |
841 | * not defined there. We instead check the GPT_FLAG_NO_BLOCK_IO_PROTOCOL, as | |
842 | * recommended by the UEFI spec (See "12.3.3 Number and Location of System | |
843 | * Partitions"). */ | |
a48dd347 LP |
844 | |
845 | if (pflags & GPT_FLAG_NO_BLOCK_IO_PROTOCOL) | |
846 | continue; | |
847 | ||
8c1be37e LP |
848 | designator = PARTITION_ESP; |
849 | fstype = "vfat"; | |
a8c47660 LP |
850 | |
851 | } else if (sd_id128_equal(type_id, GPT_XBOOTLDR)) { | |
852 | ||
de98f631 | 853 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 854 | |
a8c47660 LP |
855 | if (pflags & GPT_FLAG_NO_AUTO) |
856 | continue; | |
857 | ||
858 | designator = PARTITION_XBOOTLDR; | |
859 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
de98f631 | 860 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
8c1be37e LP |
861 | } |
862 | #ifdef GPT_ROOT_NATIVE | |
863 | else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE)) { | |
4623e8e6 | 864 | |
de98f631 | 865 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 866 | |
a48dd347 LP |
867 | if (pflags & GPT_FLAG_NO_AUTO) |
868 | continue; | |
869 | ||
4623e8e6 LP |
870 | /* If a root ID is specified, ignore everything but the root id */ |
871 | if (!sd_id128_is_null(root_uuid) && !sd_id128_equal(root_uuid, id)) | |
872 | continue; | |
873 | ||
8c1be37e LP |
874 | designator = PARTITION_ROOT; |
875 | architecture = native_architecture(); | |
9b6deb03 | 876 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
de98f631 | 877 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e | 878 | |
4f8b86e3 | 879 | } else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE_VERITY)) { |
4623e8e6 | 880 | |
0f7c9a3d LP |
881 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
882 | ||
a48dd347 LP |
883 | if (pflags & GPT_FLAG_NO_AUTO) |
884 | continue; | |
885 | ||
4623e8e6 LP |
886 | m->can_verity = true; |
887 | ||
888 | /* Ignore verity unless a root hash is specified */ | |
aee36b4e | 889 | if (sd_id128_is_null(root_verity_uuid) || !sd_id128_equal(root_verity_uuid, id)) |
4623e8e6 LP |
890 | continue; |
891 | ||
892 | designator = PARTITION_ROOT_VERITY; | |
893 | fstype = "DM_verity_hash"; | |
894 | architecture = native_architecture(); | |
895 | rw = false; | |
896 | } | |
897 | #endif | |
8c1be37e LP |
898 | #ifdef GPT_ROOT_SECONDARY |
899 | else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY)) { | |
4623e8e6 | 900 | |
de98f631 | 901 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 902 | |
a48dd347 LP |
903 | if (pflags & GPT_FLAG_NO_AUTO) |
904 | continue; | |
905 | ||
4623e8e6 LP |
906 | /* If a root ID is specified, ignore everything but the root id */ |
907 | if (!sd_id128_is_null(root_uuid) && !sd_id128_equal(root_uuid, id)) | |
908 | continue; | |
909 | ||
8c1be37e LP |
910 | designator = PARTITION_ROOT_SECONDARY; |
911 | architecture = SECONDARY_ARCHITECTURE; | |
9b6deb03 | 912 | rw = !(pflags & GPT_FLAG_READ_ONLY); |
de98f631 | 913 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e | 914 | |
4f8b86e3 | 915 | } else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY_VERITY)) { |
a48dd347 | 916 | |
0f7c9a3d LP |
917 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); |
918 | ||
a48dd347 LP |
919 | if (pflags & GPT_FLAG_NO_AUTO) |
920 | continue; | |
921 | ||
4623e8e6 LP |
922 | m->can_verity = true; |
923 | ||
924 | /* Ignore verity unless root has is specified */ | |
aee36b4e | 925 | if (sd_id128_is_null(root_verity_uuid) || !sd_id128_equal(root_verity_uuid, id)) |
4623e8e6 LP |
926 | continue; |
927 | ||
928 | designator = PARTITION_ROOT_SECONDARY_VERITY; | |
929 | fstype = "DM_verity_hash"; | |
930 | architecture = SECONDARY_ARCHITECTURE; | |
931 | rw = false; | |
932 | } | |
aee36b4e LP |
933 | #endif |
934 | #ifdef GPT_USR_NATIVE | |
935 | else if (sd_id128_equal(type_id, GPT_USR_NATIVE)) { | |
936 | ||
de98f631 | 937 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
aee36b4e LP |
938 | |
939 | if (pflags & GPT_FLAG_NO_AUTO) | |
940 | continue; | |
941 | ||
942 | /* If a usr ID is specified, ignore everything but the usr id */ | |
943 | if (!sd_id128_is_null(usr_uuid) && !sd_id128_equal(usr_uuid, id)) | |
944 | continue; | |
945 | ||
946 | designator = PARTITION_USR; | |
947 | architecture = native_architecture(); | |
948 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
de98f631 | 949 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e LP |
950 | |
951 | } else if (sd_id128_equal(type_id, GPT_USR_NATIVE_VERITY)) { | |
952 | ||
953 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); | |
954 | ||
955 | if (pflags & GPT_FLAG_NO_AUTO) | |
956 | continue; | |
957 | ||
958 | m->can_verity = true; | |
959 | ||
960 | /* Ignore verity unless a usr hash is specified */ | |
961 | if (sd_id128_is_null(usr_verity_uuid) || !sd_id128_equal(usr_verity_uuid, id)) | |
962 | continue; | |
963 | ||
964 | designator = PARTITION_USR_VERITY; | |
965 | fstype = "DM_verity_hash"; | |
966 | architecture = native_architecture(); | |
967 | rw = false; | |
968 | } | |
969 | #endif | |
970 | #ifdef GPT_USR_SECONDARY | |
971 | else if (sd_id128_equal(type_id, GPT_USR_SECONDARY)) { | |
972 | ||
de98f631 | 973 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
aee36b4e LP |
974 | |
975 | if (pflags & GPT_FLAG_NO_AUTO) | |
976 | continue; | |
977 | ||
978 | /* If a usr ID is specified, ignore everything but the usr id */ | |
979 | if (!sd_id128_is_null(usr_uuid) && !sd_id128_equal(usr_uuid, id)) | |
980 | continue; | |
981 | ||
982 | designator = PARTITION_USR_SECONDARY; | |
983 | architecture = SECONDARY_ARCHITECTURE; | |
984 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
de98f631 | 985 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
aee36b4e LP |
986 | |
987 | } else if (sd_id128_equal(type_id, GPT_USR_SECONDARY_VERITY)) { | |
988 | ||
989 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY); | |
990 | ||
991 | if (pflags & GPT_FLAG_NO_AUTO) | |
992 | continue; | |
993 | ||
994 | m->can_verity = true; | |
995 | ||
996 | /* Ignore verity unless usr has is specified */ | |
997 | if (sd_id128_is_null(usr_verity_uuid) || !sd_id128_equal(usr_verity_uuid, id)) | |
998 | continue; | |
999 | ||
1000 | designator = PARTITION_USR_SECONDARY_VERITY; | |
1001 | fstype = "DM_verity_hash"; | |
1002 | architecture = SECONDARY_ARCHITECTURE; | |
1003 | rw = false; | |
1004 | } | |
8c1be37e LP |
1005 | #endif |
1006 | else if (sd_id128_equal(type_id, GPT_SWAP)) { | |
a48dd347 | 1007 | |
0f7c9a3d LP |
1008 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO); |
1009 | ||
a48dd347 LP |
1010 | if (pflags & GPT_FLAG_NO_AUTO) |
1011 | continue; | |
1012 | ||
8c1be37e LP |
1013 | designator = PARTITION_SWAP; |
1014 | fstype = "swap"; | |
aee36b4e | 1015 | |
8c1be37e LP |
1016 | } else if (sd_id128_equal(type_id, GPT_LINUX_GENERIC)) { |
1017 | ||
de98f631 | 1018 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 1019 | |
a48dd347 LP |
1020 | if (pflags & GPT_FLAG_NO_AUTO) |
1021 | continue; | |
1022 | ||
8c1be37e LP |
1023 | if (generic_node) |
1024 | multiple_generic = true; | |
1025 | else { | |
1026 | generic_nr = nr; | |
9b6deb03 | 1027 | generic_rw = !(pflags & GPT_FLAG_READ_ONLY); |
de98f631 | 1028 | generic_growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
be30ad41 | 1029 | generic_uuid = id; |
8c1be37e LP |
1030 | generic_node = strdup(node); |
1031 | if (!generic_node) | |
1032 | return -ENOMEM; | |
1033 | } | |
d4dffb85 LP |
1034 | |
1035 | } else if (sd_id128_equal(type_id, GPT_TMP)) { | |
1036 | ||
de98f631 | 1037 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 1038 | |
d4dffb85 LP |
1039 | if (pflags & GPT_FLAG_NO_AUTO) |
1040 | continue; | |
1041 | ||
1042 | designator = PARTITION_TMP; | |
1043 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
de98f631 | 1044 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
d4dffb85 LP |
1045 | |
1046 | } else if (sd_id128_equal(type_id, GPT_VAR)) { | |
1047 | ||
de98f631 | 1048 | check_partition_flags(node, pflags, GPT_FLAG_NO_AUTO|GPT_FLAG_READ_ONLY|GPT_FLAG_GROWFS); |
0f7c9a3d | 1049 | |
d4dffb85 LP |
1050 | if (pflags & GPT_FLAG_NO_AUTO) |
1051 | continue; | |
1052 | ||
1053 | if (!FLAGS_SET(flags, DISSECT_IMAGE_RELAX_VAR_CHECK)) { | |
1054 | sd_id128_t var_uuid; | |
1055 | ||
1056 | /* For /var we insist that the uuid of the partition matches the | |
1057 | * HMAC-SHA256 of the /var GPT partition type uuid, keyed by machine | |
1058 | * ID. Why? Unlike the other partitions /var is inherently | |
1059 | * installation specific, hence we need to be careful not to mount it | |
1060 | * in the wrong installation. By hashing the partition UUID from | |
1061 | * /etc/machine-id we can securely bind the partition to the | |
1062 | * installation. */ | |
1063 | ||
1064 | r = sd_id128_get_machine_app_specific(GPT_VAR, &var_uuid); | |
1065 | if (r < 0) | |
1066 | return r; | |
1067 | ||
1068 | if (!sd_id128_equal(var_uuid, id)) { | |
1069 | log_debug("Found a /var/ partition, but its UUID didn't match our expectations, ignoring."); | |
1070 | continue; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | designator = PARTITION_VAR; | |
1075 | rw = !(pflags & GPT_FLAG_READ_ONLY); | |
de98f631 | 1076 | growfs = FLAGS_SET(pflags, GPT_FLAG_GROWFS); |
8c1be37e LP |
1077 | } |
1078 | ||
1079 | if (designator != _PARTITION_DESIGNATOR_INVALID) { | |
08fe0a53 | 1080 | _cleanup_free_ char *t = NULL, *n = NULL, *o = NULL, *l = NULL; |
18d73705 | 1081 | const char *options = NULL; |
8c1be37e | 1082 | |
08fe0a53 LP |
1083 | if (m->partitions[designator].found) { |
1084 | /* For most partition types the first one we see wins. Except for the | |
1085 | * rootfs and /usr, where we do a version compare of the label, and | |
1086 | * let the newest version win. This permits a simple A/B versioning | |
1087 | * scheme in OS images. */ | |
1088 | ||
1089 | if (!PARTITION_DESIGNATOR_VERSIONED(designator) || | |
1090 | strverscmp_improved(m->partitions[designator].label, label) >= 0) | |
1091 | continue; | |
1092 | ||
1093 | dissected_partition_done(m->partitions + designator); | |
1094 | } | |
8c1be37e LP |
1095 | |
1096 | if (fstype) { | |
1097 | t = strdup(fstype); | |
1098 | if (!t) | |
1099 | return -ENOMEM; | |
1100 | } | |
1101 | ||
1102 | n = strdup(node); | |
1103 | if (!n) | |
1104 | return -ENOMEM; | |
1105 | ||
08fe0a53 LP |
1106 | if (label) { |
1107 | l = strdup(label); | |
1108 | if (!l) | |
1109 | return -ENOMEM; | |
1110 | } | |
1111 | ||
f5215bc8 | 1112 | options = mount_options_from_designator(mount_options, designator); |
18d73705 LB |
1113 | if (options) { |
1114 | o = strdup(options); | |
1115 | if (!o) | |
1116 | return -ENOMEM; | |
1117 | } | |
1118 | ||
8c1be37e LP |
1119 | m->partitions[designator] = (DissectedPartition) { |
1120 | .found = true, | |
1121 | .partno = nr, | |
1122 | .rw = rw, | |
de98f631 | 1123 | .growfs = growfs, |
8c1be37e | 1124 | .architecture = architecture, |
1cc6c93a YW |
1125 | .node = TAKE_PTR(n), |
1126 | .fstype = TAKE_PTR(t), | |
08fe0a53 | 1127 | .label = TAKE_PTR(l), |
be30ad41 | 1128 | .uuid = id, |
18d73705 | 1129 | .mount_options = TAKE_PTR(o), |
8c1be37e | 1130 | }; |
8c1be37e LP |
1131 | } |
1132 | ||
1133 | } else if (is_mbr) { | |
1134 | ||
a8c47660 | 1135 | switch (blkid_partition_get_type(pp)) { |
8c1be37e | 1136 | |
a8c47660 LP |
1137 | case 0x83: /* Linux partition */ |
1138 | ||
1139 | if (pflags != 0x80) /* Bootable flag */ | |
1140 | continue; | |
8c1be37e | 1141 | |
a8c47660 LP |
1142 | if (generic_node) |
1143 | multiple_generic = true; | |
1144 | else { | |
1145 | generic_nr = nr; | |
1146 | generic_rw = true; | |
de98f631 | 1147 | generic_growfs = false; |
a8c47660 LP |
1148 | generic_node = strdup(node); |
1149 | if (!generic_node) | |
1150 | return -ENOMEM; | |
1151 | } | |
1152 | ||
1153 | break; | |
1154 | ||
1155 | case 0xEA: { /* Boot Loader Spec extended $BOOT partition */ | |
18d73705 | 1156 | _cleanup_free_ char *n = NULL, *o = NULL; |
a8c47660 | 1157 | sd_id128_t id = SD_ID128_NULL; |
18d73705 | 1158 | const char *sid, *options = NULL; |
a8c47660 LP |
1159 | |
1160 | /* First one wins */ | |
1161 | if (m->partitions[PARTITION_XBOOTLDR].found) | |
1162 | continue; | |
1163 | ||
1164 | sid = blkid_partition_get_uuid(pp); | |
1165 | if (sid) | |
1166 | (void) sd_id128_from_string(sid, &id); | |
1167 | ||
1168 | n = strdup(node); | |
1169 | if (!n) | |
8c1be37e | 1170 | return -ENOMEM; |
a8c47660 | 1171 | |
f5215bc8 | 1172 | options = mount_options_from_designator(mount_options, PARTITION_XBOOTLDR); |
18d73705 LB |
1173 | if (options) { |
1174 | o = strdup(options); | |
1175 | if (!o) | |
1176 | return -ENOMEM; | |
1177 | } | |
1178 | ||
a8c47660 LP |
1179 | m->partitions[PARTITION_XBOOTLDR] = (DissectedPartition) { |
1180 | .found = true, | |
1181 | .partno = nr, | |
1182 | .rw = true, | |
de98f631 | 1183 | .growfs = false, |
a8c47660 LP |
1184 | .architecture = _ARCHITECTURE_INVALID, |
1185 | .node = TAKE_PTR(n), | |
1186 | .uuid = id, | |
18d73705 | 1187 | .mount_options = TAKE_PTR(o), |
a8c47660 LP |
1188 | }; |
1189 | ||
1190 | break; | |
1191 | }} | |
8c1be37e LP |
1192 | } |
1193 | } | |
1194 | ||
74cb2db9 LP |
1195 | if (m->partitions[PARTITION_ROOT].found) { |
1196 | /* If we found the primary arch, then invalidate the secondary arch to avoid any ambiguities, | |
1197 | * since we never want to mount the secondary arch in this case. */ | |
1198 | m->partitions[PARTITION_ROOT_SECONDARY].found = false; | |
1199 | m->partitions[PARTITION_ROOT_SECONDARY_VERITY].found = false; | |
aee36b4e LP |
1200 | m->partitions[PARTITION_USR_SECONDARY].found = false; |
1201 | m->partitions[PARTITION_USR_SECONDARY_VERITY].found = false; | |
8c1be37e | 1202 | |
7cf66030 LP |
1203 | } else if (m->partitions[PARTITION_ROOT_VERITY].found) |
1204 | return -EADDRNOTAVAIL; /* Verity found but no matching rootfs? Something is off, refuse. */ | |
4623e8e6 | 1205 | |
7cf66030 | 1206 | else if (m->partitions[PARTITION_ROOT_SECONDARY].found) { |
aee36b4e | 1207 | |
7cf66030 LP |
1208 | /* No root partition found but there's one for the secondary architecture? Then upgrade |
1209 | * secondary arch to first */ | |
4623e8e6 | 1210 | |
7cf66030 LP |
1211 | m->partitions[PARTITION_ROOT] = m->partitions[PARTITION_ROOT_SECONDARY]; |
1212 | zero(m->partitions[PARTITION_ROOT_SECONDARY]); | |
1213 | m->partitions[PARTITION_ROOT_VERITY] = m->partitions[PARTITION_ROOT_SECONDARY_VERITY]; | |
1214 | zero(m->partitions[PARTITION_ROOT_SECONDARY_VERITY]); | |
aee36b4e | 1215 | |
7cf66030 LP |
1216 | m->partitions[PARTITION_USR] = m->partitions[PARTITION_USR_SECONDARY]; |
1217 | zero(m->partitions[PARTITION_USR_SECONDARY]); | |
1218 | m->partitions[PARTITION_USR_VERITY] = m->partitions[PARTITION_USR_SECONDARY_VERITY]; | |
1219 | zero(m->partitions[PARTITION_USR_SECONDARY_VERITY]); | |
e0f9e7bd | 1220 | |
7cf66030 LP |
1221 | } else if (m->partitions[PARTITION_ROOT_SECONDARY_VERITY].found) |
1222 | return -EADDRNOTAVAIL; /* as above */ | |
18d73705 | 1223 | |
7cf66030 LP |
1224 | else if (m->partitions[PARTITION_USR].found) { |
1225 | ||
1226 | /* Invalidate secondary arch /usr/ if we found the primary arch */ | |
1227 | m->partitions[PARTITION_USR_SECONDARY].found = false; | |
1228 | m->partitions[PARTITION_USR_SECONDARY_VERITY].found = false; | |
1229 | ||
1230 | } else if (m->partitions[PARTITION_USR_VERITY].found) | |
1231 | return -EADDRNOTAVAIL; /* as above */ | |
8c1be37e | 1232 | |
7cf66030 | 1233 | else if (m->partitions[PARTITION_USR_SECONDARY].found) { |
e0f9e7bd | 1234 | |
7cf66030 LP |
1235 | /* Upgrade secondary arch to primary */ |
1236 | m->partitions[PARTITION_USR] = m->partitions[PARTITION_USR_SECONDARY]; | |
1237 | zero(m->partitions[PARTITION_USR_SECONDARY]); | |
1238 | m->partitions[PARTITION_USR_VERITY] = m->partitions[PARTITION_USR_SECONDARY_VERITY]; | |
1239 | zero(m->partitions[PARTITION_USR_SECONDARY_VERITY]); | |
1240 | ||
1241 | } else if (m->partitions[PARTITION_USR_SECONDARY_VERITY].found) | |
1242 | return -EADDRNOTAVAIL; /* as above */ | |
1243 | ||
4b5de5dd LP |
1244 | else if ((flags & DISSECT_IMAGE_GENERIC_ROOT) && |
1245 | (!verity || !verity->root_hash)) { | |
7cf66030 LP |
1246 | |
1247 | /* OK, we found nothing usable, then check if there's a single generic one distro, and use | |
4b5de5dd LP |
1248 | * that. If the root hash was set however, then we won't fall back to a generic node, because |
1249 | * the root hash decides. */ | |
7cf66030 LP |
1250 | |
1251 | /* If we didn't find a properly marked root partition, but we did find a single suitable | |
1252 | * generic Linux partition, then use this as root partition, if the caller asked for it. */ | |
1253 | if (multiple_generic) | |
1254 | return -ENOTUNIQ; | |
1255 | ||
4b5de5dd LP |
1256 | /* If we didn't find a generic node, then we can't fix this up either */ |
1257 | if (generic_node) { | |
1258 | _cleanup_free_ char *o = NULL; | |
1259 | const char *options; | |
8c1be37e | 1260 | |
f5215bc8 | 1261 | options = mount_options_from_designator(mount_options, PARTITION_ROOT); |
18d73705 LB |
1262 | if (options) { |
1263 | o = strdup(options); | |
1264 | if (!o) | |
1265 | return -ENOMEM; | |
1266 | } | |
1267 | ||
1f8fb21c | 1268 | assert(generic_nr >= 0); |
8c1be37e LP |
1269 | m->partitions[PARTITION_ROOT] = (DissectedPartition) { |
1270 | .found = true, | |
1271 | .rw = generic_rw, | |
de98f631 | 1272 | .growfs = generic_growfs, |
8c1be37e LP |
1273 | .partno = generic_nr, |
1274 | .architecture = _ARCHITECTURE_INVALID, | |
1cc6c93a | 1275 | .node = TAKE_PTR(generic_node), |
be30ad41 | 1276 | .uuid = generic_uuid, |
18d73705 | 1277 | .mount_options = TAKE_PTR(o), |
8c1be37e | 1278 | }; |
e0f9e7bd | 1279 | } |
8c1be37e LP |
1280 | } |
1281 | ||
4b5de5dd LP |
1282 | /* 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 */ |
1283 | if (FLAGS_SET(flags, DISSECT_IMAGE_REQUIRE_ROOT) && | |
1284 | !(m->partitions[PARTITION_ROOT].found || (m->partitions[PARTITION_USR].found && FLAGS_SET(flags, DISSECT_IMAGE_USR_NO_ROOT)))) | |
1285 | return -ENXIO; | |
1286 | ||
aee36b4e LP |
1287 | /* Refuse if we found a verity partition for /usr but no matching file system partition */ |
1288 | if (!m->partitions[PARTITION_USR].found && m->partitions[PARTITION_USR_VERITY].found) | |
1289 | return -EADDRNOTAVAIL; | |
1290 | ||
1291 | /* Combinations of verity /usr with verity-less root is OK, but the reverse is not */ | |
c848516f | 1292 | if (m->partitions[PARTITION_ROOT_VERITY].found && m->partitions[PARTITION_USR].found && !m->partitions[PARTITION_USR_VERITY].found) |
aee36b4e LP |
1293 | return -EADDRNOTAVAIL; |
1294 | ||
89e62e0b | 1295 | if (verity && verity->root_hash) { |
aee36b4e LP |
1296 | if (verity->designator < 0 || verity->designator == PARTITION_ROOT) { |
1297 | if (!m->partitions[PARTITION_ROOT_VERITY].found || !m->partitions[PARTITION_ROOT].found) | |
1298 | return -EADDRNOTAVAIL; | |
1299 | ||
1300 | /* If we found a verity setup, then the root partition is necessarily read-only. */ | |
1301 | m->partitions[PARTITION_ROOT].rw = false; | |
1302 | m->verity = true; | |
1303 | } | |
4623e8e6 | 1304 | |
aee36b4e LP |
1305 | if (verity->designator == PARTITION_USR) { |
1306 | if (!m->partitions[PARTITION_USR_VERITY].found || !m->partitions[PARTITION_USR].found) | |
1307 | return -EADDRNOTAVAIL; | |
4623e8e6 | 1308 | |
aee36b4e LP |
1309 | m->partitions[PARTITION_USR].rw = false; |
1310 | m->verity = true; | |
1311 | } | |
4623e8e6 LP |
1312 | } |
1313 | ||
18b5886e LP |
1314 | blkid_free_probe(b); |
1315 | b = NULL; | |
1316 | ||
8c1be37e | 1317 | /* Fill in file system types if we don't know them yet. */ |
569a0e42 | 1318 | for (PartitionDesignator i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) { |
18b5886e | 1319 | DissectedPartition *p = m->partitions + i; |
8c1be37e | 1320 | |
18b5886e | 1321 | if (!p->found) |
8c1be37e LP |
1322 | continue; |
1323 | ||
18b5886e LP |
1324 | if (!p->fstype && p->node) { |
1325 | r = probe_filesystem(p->node, &p->fstype); | |
7cc84b2c | 1326 | if (r < 0 && r != -EUCLEAN) |
18b5886e | 1327 | return r; |
8c1be37e LP |
1328 | } |
1329 | ||
18b5886e LP |
1330 | if (streq_ptr(p->fstype, "crypto_LUKS")) |
1331 | m->encrypted = true; | |
896f937f LP |
1332 | |
1333 | if (p->fstype && fstype_is_ro(p->fstype)) | |
1334 | p->rw = false; | |
de98f631 LP |
1335 | |
1336 | if (!p->rw) | |
1337 | p->growfs = false; | |
8c1be37e LP |
1338 | } |
1339 | ||
1cc6c93a | 1340 | *ret = TAKE_PTR(m); |
8c1be37e LP |
1341 | return 0; |
1342 | #else | |
1343 | return -EOPNOTSUPP; | |
1344 | #endif | |
1345 | } | |
1346 | ||
1347 | DissectedImage* dissected_image_unref(DissectedImage *m) { | |
8c1be37e LP |
1348 | if (!m) |
1349 | return NULL; | |
1350 | ||
08fe0a53 LP |
1351 | for (PartitionDesignator i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) |
1352 | dissected_partition_done(m->partitions + i); | |
8c1be37e | 1353 | |
593fe6c0 | 1354 | free(m->image_name); |
3b925504 LP |
1355 | free(m->hostname); |
1356 | strv_free(m->machine_info); | |
1357 | strv_free(m->os_release); | |
7718ac97 | 1358 | strv_free(m->extension_release); |
3b925504 | 1359 | |
5fecf46d | 1360 | return mfree(m); |
8c1be37e LP |
1361 | } |
1362 | ||
18b5886e | 1363 | static int is_loop_device(const char *path) { |
553e15f2 | 1364 | char s[SYS_BLOCK_PATH_MAX("/../loop/")]; |
18b5886e LP |
1365 | struct stat st; |
1366 | ||
1367 | assert(path); | |
1368 | ||
1369 | if (stat(path, &st) < 0) | |
1370 | return -errno; | |
1371 | ||
1372 | if (!S_ISBLK(st.st_mode)) | |
1373 | return -ENOTBLK; | |
1374 | ||
553e15f2 | 1375 | xsprintf_sys_block_path(s, "/loop/", st.st_dev); |
18b5886e LP |
1376 | if (access(s, F_OK) < 0) { |
1377 | if (errno != ENOENT) | |
1378 | return -errno; | |
1379 | ||
1380 | /* The device itself isn't a loop device, but maybe it's a partition and its parent is? */ | |
553e15f2 | 1381 | xsprintf_sys_block_path(s, "/../loop/", st.st_dev); |
18b5886e LP |
1382 | if (access(s, F_OK) < 0) |
1383 | return errno == ENOENT ? false : -errno; | |
1384 | } | |
1385 | ||
1386 | return true; | |
1387 | } | |
1388 | ||
cf32c486 LP |
1389 | static int run_fsck(const char *node, const char *fstype) { |
1390 | int r, exit_status; | |
1391 | pid_t pid; | |
1392 | ||
1393 | assert(node); | |
1394 | assert(fstype); | |
1395 | ||
1396 | r = fsck_exists(fstype); | |
1397 | if (r < 0) { | |
1398 | log_debug_errno(r, "Couldn't determine whether fsck for %s exists, proceeding anyway.", fstype); | |
1399 | return 0; | |
1400 | } | |
1401 | if (r == 0) { | |
1402 | log_debug("Not checking partition %s, as fsck for %s does not exist.", node, fstype); | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | r = safe_fork("(fsck)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_DEATHSIG|FORK_NULL_STDIO, &pid); | |
1407 | if (r < 0) | |
1408 | return log_debug_errno(r, "Failed to fork off fsck: %m"); | |
1409 | if (r == 0) { | |
1410 | /* Child */ | |
1411 | execl("/sbin/fsck", "/sbin/fsck", "-aT", node, NULL); | |
7e0ed2e9 | 1412 | log_open(); |
cf32c486 LP |
1413 | log_debug_errno(errno, "Failed to execl() fsck: %m"); |
1414 | _exit(FSCK_OPERATIONAL_ERROR); | |
1415 | } | |
1416 | ||
1417 | exit_status = wait_for_terminate_and_check("fsck", pid, 0); | |
1418 | if (exit_status < 0) | |
1419 | return log_debug_errno(exit_status, "Failed to fork off /sbin/fsck: %m"); | |
1420 | ||
1421 | if ((exit_status & ~FSCK_ERROR_CORRECTED) != FSCK_SUCCESS) { | |
1422 | log_debug("fsck failed with exit status %i.", exit_status); | |
1423 | ||
1424 | if ((exit_status & (FSCK_SYSTEM_SHOULD_REBOOT|FSCK_ERRORS_LEFT_UNCORRECTED)) != 0) | |
1425 | return log_debug_errno(SYNTHETIC_ERRNO(EUCLEAN), "File system is corrupted, refusing."); | |
1426 | ||
1427 | log_debug("Ignoring fsck error."); | |
1428 | } | |
1429 | ||
1430 | return 0; | |
1431 | } | |
1432 | ||
81939d9d LP |
1433 | static int fs_grow(const char *node_path, const char *mount_path) { |
1434 | _cleanup_close_ int mount_fd = -1, node_fd = -1; | |
1435 | char fb[FORMAT_BYTES_MAX]; | |
1436 | uint64_t size, newsize; | |
1437 | int r; | |
1438 | ||
1439 | node_fd = open(node_path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY); | |
1440 | if (node_fd < 0) | |
1441 | return log_debug_errno(errno, "Failed to open node device %s: %m", node_path); | |
1442 | ||
1443 | if (ioctl(node_fd, BLKGETSIZE64, &size) != 0) | |
1444 | return log_debug_errno(errno, "Failed to get block device size of %s: %m", node_path); | |
1445 | ||
1446 | mount_fd = open(mount_path, O_RDONLY|O_DIRECTORY|O_CLOEXEC); | |
1447 | if (mount_fd < 0) | |
1448 | return log_debug_errno(errno, "Failed to open mountd file system %s: %m", mount_path); | |
1449 | ||
1450 | log_debug("Resizing \"%s\" to %"PRIu64" bytes...", mount_path, size); | |
1451 | r = resize_fs(mount_fd, size, &newsize); | |
1452 | if (r < 0) | |
1453 | return log_debug_errno(r, "Failed to resize \"%s\" to %"PRIu64" bytes: %m", mount_path, size); | |
1454 | ||
1455 | if (newsize == size) | |
1456 | log_debug("Successfully resized \"%s\" to %s bytes.", | |
1457 | mount_path, | |
1458 | format_bytes(fb, sizeof fb, newsize)); | |
1459 | else { | |
1460 | assert(newsize < size); | |
1461 | log_debug("Successfully resized \"%s\" to %s bytes (%"PRIu64" bytes lost due to blocksize).", | |
1462 | mount_path, | |
1463 | format_bytes(fb, sizeof fb, newsize), | |
1464 | size - newsize); | |
1465 | } | |
1466 | ||
1467 | return 0; | |
1468 | } | |
1469 | ||
18b5886e LP |
1470 | static int mount_partition( |
1471 | DissectedPartition *m, | |
1472 | const char *where, | |
1473 | const char *directory, | |
2d3a5a73 | 1474 | uid_t uid_shift, |
21b61b1d | 1475 | uid_t uid_range, |
18b5886e LP |
1476 | DissectImageFlags flags) { |
1477 | ||
2d3a5a73 LP |
1478 | _cleanup_free_ char *chased = NULL, *options = NULL; |
1479 | const char *p, *node, *fstype; | |
21b61b1d | 1480 | bool rw, remap_uid_gid = false; |
2eedfd2d | 1481 | int r; |
8c1be37e LP |
1482 | |
1483 | assert(m); | |
1484 | assert(where); | |
1485 | ||
4dc28665 | 1486 | /* Use decrypted node and matching fstype if available, otherwise use the original device */ |
18b5886e | 1487 | node = m->decrypted_node ?: m->node; |
4dc28665 | 1488 | fstype = m->decrypted_node ? m->decrypted_fstype: m->fstype; |
18b5886e | 1489 | |
4dc28665 | 1490 | if (!m->found || !node) |
8c1be37e | 1491 | return 0; |
4dc28665 LP |
1492 | if (!fstype) |
1493 | return -EAFNOSUPPORT; | |
8c1be37e | 1494 | |
fa45d12c | 1495 | /* 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 | 1496 | if (streq(fstype, "crypto_LUKS")) |
fa45d12c | 1497 | return -EUNATCH; |
18b5886e | 1498 | |
ef9c184d | 1499 | rw = m->rw && !(flags & DISSECT_IMAGE_MOUNT_READ_ONLY); |
8c1be37e | 1500 | |
cf32c486 LP |
1501 | if (FLAGS_SET(flags, DISSECT_IMAGE_FSCK) && rw) { |
1502 | r = run_fsck(node, fstype); | |
1503 | if (r < 0) | |
1504 | return r; | |
1505 | } | |
1506 | ||
2eedfd2d | 1507 | if (directory) { |
334eb5b0 LP |
1508 | /* Automatically create missing mount points inside the image, if necessary. */ |
1509 | r = mkdir_p_root(where, directory, uid_shift, (gid_t) uid_shift, 0755); | |
1510 | if (r < 0 && r != -EROFS) | |
1511 | return r; | |
1f0f82f1 | 1512 | |
a5648b80 | 1513 | r = chase_symlinks(directory, where, CHASE_PREFIX_ROOT, &chased, NULL); |
2eedfd2d LP |
1514 | if (r < 0) |
1515 | return r; | |
1516 | ||
1517 | p = chased; | |
9842905e LP |
1518 | } else { |
1519 | /* Create top-level mount if missing – but only if this is asked for. This won't modify the | |
1520 | * image (as the branch above does) but the host hierarchy, and the created directory might | |
1521 | * survive our mount in the host hierarchy hence. */ | |
1522 | if (FLAGS_SET(flags, DISSECT_IMAGE_MKDIR)) { | |
1523 | r = mkdir_p(where, 0755); | |
1524 | if (r < 0) | |
1525 | return r; | |
1526 | } | |
1527 | ||
8c1be37e | 1528 | p = where; |
9842905e | 1529 | } |
8c1be37e | 1530 | |
18b5886e | 1531 | /* If requested, turn on discard support. */ |
154d2269 | 1532 | if (fstype_can_discard(fstype) && |
18b5886e | 1533 | ((flags & DISSECT_IMAGE_DISCARD) || |
3afda7c7 | 1534 | ((flags & DISSECT_IMAGE_DISCARD_ON_LOOP) && is_loop_device(m->node) > 0))) { |
2d3a5a73 LP |
1535 | options = strdup("discard"); |
1536 | if (!options) | |
1537 | return -ENOMEM; | |
1538 | } | |
1539 | ||
21b61b1d | 1540 | if (uid_is_valid(uid_shift) && uid_shift != 0) { |
2d3a5a73 | 1541 | |
21b61b1d LP |
1542 | if (fstype_can_uid_gid(fstype)) { |
1543 | _cleanup_free_ char *uid_option = NULL; | |
2d3a5a73 | 1544 | |
21b61b1d LP |
1545 | if (asprintf(&uid_option, "uid=" UID_FMT ",gid=" GID_FMT, uid_shift, (gid_t) uid_shift) < 0) |
1546 | return -ENOMEM; | |
1547 | ||
1548 | if (!strextend_with_separator(&options, ",", uid_option)) | |
1549 | return -ENOMEM; | |
1550 | } else if (FLAGS_SET(flags, DISSECT_IMAGE_MOUNT_IDMAPPED)) | |
1551 | remap_uid_gid = true; | |
2d3a5a73 | 1552 | } |
8c1be37e | 1553 | |
18d73705 | 1554 | if (!isempty(m->mount_options)) |
c2bc710b | 1555 | if (!strextend_with_separator(&options, ",", m->mount_options)) |
18d73705 LB |
1556 | return -ENOMEM; |
1557 | ||
b620bf33 LP |
1558 | /* So, when you request MS_RDONLY from ext4, then this means nothing. It happily still writes to the |
1559 | * backing storage. What's worse, the BLKRO[GS]ET flag and (in case of loopback devices) | |
1560 | * LO_FLAGS_READ_ONLY don't mean anything, they affect userspace accesses only, and write accesses | |
1561 | * from the upper file system still get propagated through to the underlying file system, | |
1562 | * unrestricted. To actually get ext4/xfs/btrfs to stop writing to the device we need to specify | |
1563 | * "norecovery" as mount option, in addition to MS_RDONLY. Yes, this sucks, since it means we need to | |
1564 | * carry a per file system table here. | |
1565 | * | |
1566 | * Note that this means that we might not be able to mount corrupted file systems as read-only | |
1567 | * anymore (since in some cases the kernel implementations will refuse mounting when corrupted, | |
1568 | * read-only and "norecovery" is specified). But I think for the case of automatically determined | |
1569 | * mount options for loopback devices this is the right choice, since otherwise using the same | |
1570 | * loopback file twice even in read-only mode, is going to fail badly sooner or later. The usecase of | |
1571 | * making reuse of the immutable images "just work" is more relevant to us than having read-only | |
1572 | * access that actually modifies stuff work on such image files. Or to say this differently: if | |
1573 | * people want their file systems to be fixed up they should just open them in writable mode, where | |
1574 | * all these problems don't exist. */ | |
1575 | if (!rw && STRPTR_IN_SET(fstype, "ext3", "ext4", "xfs", "btrfs")) | |
1576 | if (!strextend_with_separator(&options, ",", "norecovery")) | |
1577 | return -ENOMEM; | |
1578 | ||
511a8cfe | 1579 | r = mount_nofollow_verbose(LOG_DEBUG, node, p, fstype, MS_NODEV|(rw ? 0 : MS_RDONLY), options); |
d9223c07 LP |
1580 | if (r < 0) |
1581 | return r; | |
1582 | ||
81939d9d LP |
1583 | if (rw && m->growfs && FLAGS_SET(flags, DISSECT_IMAGE_GROWFS)) |
1584 | (void) fs_grow(node, p); | |
1585 | ||
21b61b1d LP |
1586 | if (remap_uid_gid) { |
1587 | r = remount_idmap(p, uid_shift, uid_range); | |
1588 | if (r < 0) | |
1589 | return r; | |
1590 | } | |
1591 | ||
d9223c07 | 1592 | return 1; |
8c1be37e LP |
1593 | } |
1594 | ||
7cf66030 LP |
1595 | static int mount_root_tmpfs(const char *where, uid_t uid_shift, DissectImageFlags flags) { |
1596 | _cleanup_free_ char *options = NULL; | |
1597 | int r; | |
1598 | ||
1599 | assert(where); | |
1600 | ||
1601 | /* For images that contain /usr/ but no rootfs, let's mount rootfs as tmpfs */ | |
1602 | ||
1603 | if (FLAGS_SET(flags, DISSECT_IMAGE_MKDIR)) { | |
1604 | r = mkdir_p(where, 0755); | |
1605 | if (r < 0) | |
1606 | return r; | |
1607 | } | |
1608 | ||
1609 | if (uid_is_valid(uid_shift)) { | |
1610 | if (asprintf(&options, "uid=" UID_FMT ",gid=" GID_FMT, uid_shift, (gid_t) uid_shift) < 0) | |
1611 | return -ENOMEM; | |
1612 | } | |
1613 | ||
1614 | r = mount_nofollow_verbose(LOG_DEBUG, "rootfs", where, "tmpfs", MS_NODEV, options); | |
1615 | if (r < 0) | |
1616 | return r; | |
1617 | ||
1618 | return 1; | |
1619 | } | |
1620 | ||
21b61b1d LP |
1621 | int dissected_image_mount( |
1622 | DissectedImage *m, | |
1623 | const char *where, | |
1624 | uid_t uid_shift, | |
1625 | uid_t uid_range, | |
1626 | DissectImageFlags flags) { | |
1627 | ||
1f0f82f1 | 1628 | int r, xbootldr_mounted; |
8c1be37e LP |
1629 | |
1630 | assert(m); | |
1631 | assert(where); | |
1632 | ||
fa45d12c LP |
1633 | /* Returns: |
1634 | * | |
1635 | * -ENXIO → No root partition found | |
7718ac97 | 1636 | * -EMEDIUMTYPE → DISSECT_IMAGE_VALIDATE_OS set but no os-release/extension-release file found |
fa45d12c LP |
1637 | * -EUNATCH → Encrypted partition found for which no dm-crypt was set up yet |
1638 | * -EUCLEAN → fsck for file system failed | |
1639 | * -EBUSY → File system already mounted/used elsewhere (kernel) | |
4dc28665 | 1640 | * -EAFNOSUPPORT → File system type not supported or not known |
fa45d12c LP |
1641 | */ |
1642 | ||
7cf66030 LP |
1643 | if (!(m->partitions[PARTITION_ROOT].found || |
1644 | (m->partitions[PARTITION_USR].found && FLAGS_SET(flags, DISSECT_IMAGE_USR_NO_ROOT)))) | |
1645 | return -ENXIO; /* Require a root fs or at least a /usr/ fs (the latter is subject to a flag of its own) */ | |
8c1be37e | 1646 | |
2d3a5a73 | 1647 | if ((flags & DISSECT_IMAGE_MOUNT_NON_ROOT_ONLY) == 0) { |
7cf66030 LP |
1648 | |
1649 | /* First mount the root fs. If there's none we use a tmpfs. */ | |
1650 | if (m->partitions[PARTITION_ROOT].found) | |
21b61b1d | 1651 | r = mount_partition(m->partitions + PARTITION_ROOT, where, NULL, uid_shift, uid_range, flags); |
7cf66030 LP |
1652 | else |
1653 | r = mount_root_tmpfs(where, uid_shift, flags); | |
2d3a5a73 LP |
1654 | if (r < 0) |
1655 | return r; | |
aee36b4e | 1656 | |
aee36b4e | 1657 | /* For us mounting root always means mounting /usr as well */ |
21b61b1d | 1658 | r = mount_partition(m->partitions + PARTITION_USR, where, "/usr", uid_shift, uid_range, flags); |
aee36b4e LP |
1659 | if (r < 0) |
1660 | return r; | |
03bcb6d4 LP |
1661 | |
1662 | if (flags & DISSECT_IMAGE_VALIDATE_OS) { | |
1663 | r = path_is_os_tree(where); | |
1664 | if (r < 0) | |
1665 | return r; | |
7718ac97 LB |
1666 | if (r == 0) { |
1667 | r = path_is_extension_tree(where, m->image_name); | |
1668 | if (r < 0) | |
1669 | return r; | |
1670 | if (r == 0) | |
1671 | return -EMEDIUMTYPE; | |
1672 | } | |
03bcb6d4 | 1673 | } |
2d3a5a73 LP |
1674 | } |
1675 | ||
705727fd | 1676 | if (flags & DISSECT_IMAGE_MOUNT_ROOT_ONLY) |
2d3a5a73 | 1677 | return 0; |
8c1be37e | 1678 | |
21b61b1d | 1679 | r = mount_partition(m->partitions + PARTITION_HOME, where, "/home", uid_shift, uid_range, flags); |
8c1be37e LP |
1680 | if (r < 0) |
1681 | return r; | |
1682 | ||
21b61b1d | 1683 | r = mount_partition(m->partitions + PARTITION_SRV, where, "/srv", uid_shift, uid_range, flags); |
8c1be37e LP |
1684 | if (r < 0) |
1685 | return r; | |
1686 | ||
21b61b1d | 1687 | r = mount_partition(m->partitions + PARTITION_VAR, where, "/var", uid_shift, uid_range, flags); |
d4dffb85 LP |
1688 | if (r < 0) |
1689 | return r; | |
1690 | ||
21b61b1d | 1691 | r = mount_partition(m->partitions + PARTITION_TMP, where, "/var/tmp", uid_shift, uid_range, flags); |
d4dffb85 LP |
1692 | if (r < 0) |
1693 | return r; | |
1694 | ||
21b61b1d | 1695 | xbootldr_mounted = mount_partition(m->partitions + PARTITION_XBOOTLDR, where, "/boot", uid_shift, uid_range, flags); |
1f0f82f1 LP |
1696 | if (xbootldr_mounted < 0) |
1697 | return xbootldr_mounted; | |
d9223c07 | 1698 | |
8c1be37e | 1699 | if (m->partitions[PARTITION_ESP].found) { |
1f0f82f1 LP |
1700 | int esp_done = false; |
1701 | ||
d9223c07 LP |
1702 | /* Mount the ESP to /efi if it exists. If it doesn't exist, use /boot instead, but only if it |
1703 | * exists and is empty, and we didn't already mount the XBOOTLDR partition into it. */ | |
8c1be37e | 1704 | |
a5648b80 | 1705 | r = chase_symlinks("/efi", where, CHASE_PREFIX_ROOT, NULL, NULL); |
1f0f82f1 LP |
1706 | if (r < 0) { |
1707 | if (r != -ENOENT) | |
d9223c07 | 1708 | return r; |
8c1be37e | 1709 | |
1f0f82f1 LP |
1710 | /* /efi doesn't exist. Let's see if /boot is suitable then */ |
1711 | ||
1712 | if (!xbootldr_mounted) { | |
1713 | _cleanup_free_ char *p = NULL; | |
2eedfd2d | 1714 | |
1f0f82f1 LP |
1715 | r = chase_symlinks("/boot", where, CHASE_PREFIX_ROOT, &p, NULL); |
1716 | if (r < 0) { | |
1717 | if (r != -ENOENT) | |
1718 | return r; | |
1719 | } else if (dir_is_empty(p) > 0) { | |
1720 | /* It exists and is an empty directory. Let's mount the ESP there. */ | |
21b61b1d | 1721 | r = mount_partition(m->partitions + PARTITION_ESP, where, "/boot", uid_shift, uid_range, flags); |
1f0f82f1 LP |
1722 | if (r < 0) |
1723 | return r; | |
1724 | ||
1725 | esp_done = true; | |
1726 | } | |
2eedfd2d | 1727 | } |
8c1be37e | 1728 | } |
1f0f82f1 LP |
1729 | |
1730 | if (!esp_done) { | |
1731 | /* OK, let's mount the ESP now to /efi (possibly creating the dir if missing) */ | |
1732 | ||
21b61b1d | 1733 | r = mount_partition(m->partitions + PARTITION_ESP, where, "/efi", uid_shift, uid_range, flags); |
1f0f82f1 LP |
1734 | if (r < 0) |
1735 | return r; | |
1736 | } | |
8c1be37e LP |
1737 | } |
1738 | ||
1739 | return 0; | |
1740 | } | |
1741 | ||
21b61b1d LP |
1742 | int dissected_image_mount_and_warn( |
1743 | DissectedImage *m, | |
1744 | const char *where, | |
1745 | uid_t uid_shift, | |
1746 | uid_t uid_range, | |
1747 | DissectImageFlags flags) { | |
1748 | ||
af187ab2 LP |
1749 | int r; |
1750 | ||
1751 | assert(m); | |
1752 | assert(where); | |
1753 | ||
21b61b1d | 1754 | r = dissected_image_mount(m, where, uid_shift, uid_range, flags); |
af187ab2 LP |
1755 | if (r == -ENXIO) |
1756 | return log_error_errno(r, "Not root file system found in image."); | |
1757 | if (r == -EMEDIUMTYPE) | |
7718ac97 | 1758 | return log_error_errno(r, "No suitable os-release/extension-release file in image found."); |
af187ab2 LP |
1759 | if (r == -EUNATCH) |
1760 | return log_error_errno(r, "Encrypted file system discovered, but decryption not requested."); | |
1761 | if (r == -EUCLEAN) | |
1762 | return log_error_errno(r, "File system check on image failed."); | |
1763 | if (r == -EBUSY) | |
1764 | return log_error_errno(r, "File system already mounted elsewhere."); | |
4dc28665 LP |
1765 | if (r == -EAFNOSUPPORT) |
1766 | return log_error_errno(r, "File system type not supported or not known."); | |
af187ab2 LP |
1767 | if (r < 0) |
1768 | return log_error_errno(r, "Failed to mount image: %m"); | |
1769 | ||
1770 | return r; | |
1771 | } | |
1772 | ||
349cc4a5 | 1773 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
1774 | typedef struct DecryptedPartition { |
1775 | struct crypt_device *device; | |
1776 | char *name; | |
1777 | bool relinquished; | |
1778 | } DecryptedPartition; | |
1779 | ||
1780 | struct DecryptedImage { | |
1781 | DecryptedPartition *decrypted; | |
1782 | size_t n_decrypted; | |
18b5886e LP |
1783 | }; |
1784 | #endif | |
1785 | ||
1786 | DecryptedImage* decrypted_image_unref(DecryptedImage* d) { | |
349cc4a5 | 1787 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
1788 | int r; |
1789 | ||
1790 | if (!d) | |
1791 | return NULL; | |
1792 | ||
67f63ee5 | 1793 | for (size_t i = 0; i < d->n_decrypted; i++) { |
18b5886e LP |
1794 | DecryptedPartition *p = d->decrypted + i; |
1795 | ||
1796 | if (p->device && p->name && !p->relinquished) { | |
0d12936d | 1797 | r = sym_crypt_deactivate_by_name(p->device, p->name, 0); |
18b5886e LP |
1798 | if (r < 0) |
1799 | log_debug_errno(r, "Failed to deactivate encrypted partition %s", p->name); | |
1800 | } | |
1801 | ||
1802 | if (p->device) | |
0d12936d | 1803 | sym_crypt_free(p->device); |
18b5886e LP |
1804 | free(p->name); |
1805 | } | |
1806 | ||
f91861e4 | 1807 | free(d->decrypted); |
18b5886e LP |
1808 | free(d); |
1809 | #endif | |
1810 | return NULL; | |
1811 | } | |
1812 | ||
349cc4a5 | 1813 | #if HAVE_LIBCRYPTSETUP |
4623e8e6 LP |
1814 | |
1815 | static int make_dm_name_and_node(const void *original_node, const char *suffix, char **ret_name, char **ret_node) { | |
1816 | _cleanup_free_ char *name = NULL, *node = NULL; | |
1817 | const char *base; | |
1818 | ||
1819 | assert(original_node); | |
1820 | assert(suffix); | |
1821 | assert(ret_name); | |
1822 | assert(ret_node); | |
1823 | ||
1824 | base = strrchr(original_node, '/'); | |
1825 | if (!base) | |
ac1f3ad0 LB |
1826 | base = original_node; |
1827 | else | |
1828 | base++; | |
4623e8e6 LP |
1829 | if (isempty(base)) |
1830 | return -EINVAL; | |
1831 | ||
1832 | name = strjoin(base, suffix); | |
1833 | if (!name) | |
1834 | return -ENOMEM; | |
1835 | if (!filename_is_valid(name)) | |
1836 | return -EINVAL; | |
1837 | ||
0d12936d | 1838 | node = path_join(sym_crypt_get_dir(), name); |
4623e8e6 LP |
1839 | if (!node) |
1840 | return -ENOMEM; | |
1841 | ||
1cc6c93a YW |
1842 | *ret_name = TAKE_PTR(name); |
1843 | *ret_node = TAKE_PTR(node); | |
4623e8e6 | 1844 | |
4623e8e6 LP |
1845 | return 0; |
1846 | } | |
1847 | ||
18b5886e LP |
1848 | static int decrypt_partition( |
1849 | DissectedPartition *m, | |
1850 | const char *passphrase, | |
1851 | DissectImageFlags flags, | |
1852 | DecryptedImage *d) { | |
1853 | ||
1854 | _cleanup_free_ char *node = NULL, *name = NULL; | |
0d12936d | 1855 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
18b5886e LP |
1856 | int r; |
1857 | ||
1858 | assert(m); | |
1859 | assert(d); | |
1860 | ||
1861 | if (!m->found || !m->node || !m->fstype) | |
1862 | return 0; | |
1863 | ||
1864 | if (!streq(m->fstype, "crypto_LUKS")) | |
1865 | return 0; | |
1866 | ||
bdd73ac5 ZJS |
1867 | if (!passphrase) |
1868 | return -ENOKEY; | |
1869 | ||
0d12936d LP |
1870 | r = dlopen_cryptsetup(); |
1871 | if (r < 0) | |
1872 | return r; | |
1873 | ||
4623e8e6 LP |
1874 | r = make_dm_name_and_node(m->node, "-decrypted", &name, &node); |
1875 | if (r < 0) | |
1876 | return r; | |
18b5886e | 1877 | |
319a4f4b | 1878 | if (!GREEDY_REALLOC0(d->decrypted, d->n_decrypted + 1)) |
18b5886e LP |
1879 | return -ENOMEM; |
1880 | ||
0d12936d | 1881 | r = sym_crypt_init(&cd, m->node); |
18b5886e | 1882 | if (r < 0) |
715cbb81 | 1883 | return log_debug_errno(r, "Failed to initialize dm-crypt: %m"); |
18b5886e | 1884 | |
efc3b12f | 1885 | cryptsetup_enable_logging(cd); |
1887032f | 1886 | |
0d12936d | 1887 | r = sym_crypt_load(cd, CRYPT_LUKS, NULL); |
294bd454 ZJS |
1888 | if (r < 0) |
1889 | return log_debug_errno(r, "Failed to load LUKS metadata: %m"); | |
18b5886e | 1890 | |
0d12936d | 1891 | r = sym_crypt_activate_by_passphrase(cd, name, CRYPT_ANY_SLOT, passphrase, strlen(passphrase), |
ef9c184d | 1892 | ((flags & DISSECT_IMAGE_DEVICE_READ_ONLY) ? CRYPT_ACTIVATE_READONLY : 0) | |
0d12936d | 1893 | ((flags & DISSECT_IMAGE_DISCARD_ON_CRYPTO) ? CRYPT_ACTIVATE_ALLOW_DISCARDS : 0)); |
294bd454 | 1894 | if (r < 0) { |
715cbb81 | 1895 | log_debug_errno(r, "Failed to activate LUKS device: %m"); |
294bd454 | 1896 | return r == -EPERM ? -EKEYREJECTED : r; |
18b5886e | 1897 | } |
18b5886e | 1898 | |
94344385 LP |
1899 | d->decrypted[d->n_decrypted++] = (DecryptedPartition) { |
1900 | .name = TAKE_PTR(name), | |
1901 | .device = TAKE_PTR(cd), | |
1902 | }; | |
18b5886e | 1903 | |
1cc6c93a | 1904 | m->decrypted_node = TAKE_PTR(node); |
18b5886e LP |
1905 | |
1906 | return 0; | |
4623e8e6 LP |
1907 | } |
1908 | ||
89e62e0b LP |
1909 | static int verity_can_reuse( |
1910 | const VeritySettings *verity, | |
1911 | const char *name, | |
1912 | struct crypt_device **ret_cd) { | |
1913 | ||
ac1f3ad0 LB |
1914 | /* If the same volume was already open, check that the root hashes match, and reuse it if they do */ |
1915 | _cleanup_free_ char *root_hash_existing = NULL; | |
0d12936d | 1916 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
ac1f3ad0 | 1917 | struct crypt_params_verity crypt_params = {}; |
89e62e0b | 1918 | size_t root_hash_existing_size; |
ac1f3ad0 LB |
1919 | int r; |
1920 | ||
89e62e0b LP |
1921 | assert(verity); |
1922 | assert(name); | |
ac1f3ad0 LB |
1923 | assert(ret_cd); |
1924 | ||
0d12936d | 1925 | r = sym_crypt_init_by_name(&cd, name); |
ac1f3ad0 LB |
1926 | if (r < 0) |
1927 | return log_debug_errno(r, "Error opening verity device, crypt_init_by_name failed: %m"); | |
0d12936d LP |
1928 | |
1929 | r = sym_crypt_get_verity_info(cd, &crypt_params); | |
ac1f3ad0 LB |
1930 | if (r < 0) |
1931 | return log_debug_errno(r, "Error opening verity device, crypt_get_verity_info failed: %m"); | |
0d12936d | 1932 | |
89e62e0b LP |
1933 | root_hash_existing_size = verity->root_hash_size; |
1934 | root_hash_existing = malloc0(root_hash_existing_size); | |
ac1f3ad0 LB |
1935 | if (!root_hash_existing) |
1936 | return -ENOMEM; | |
0d12936d LP |
1937 | |
1938 | r = sym_crypt_volume_key_get(cd, CRYPT_ANY_SLOT, root_hash_existing, &root_hash_existing_size, NULL, 0); | |
ac1f3ad0 LB |
1939 | if (r < 0) |
1940 | return log_debug_errno(r, "Error opening verity device, crypt_volume_key_get failed: %m"); | |
89e62e0b LP |
1941 | if (verity->root_hash_size != root_hash_existing_size || |
1942 | memcmp(root_hash_existing, verity->root_hash, verity->root_hash_size) != 0) | |
ac1f3ad0 | 1943 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Error opening verity device, it already exists but root hashes are different."); |
89e62e0b | 1944 | |
ac1f3ad0 | 1945 | #if HAVE_CRYPT_ACTIVATE_BY_SIGNED_KEY |
89e62e0b LP |
1946 | /* Ensure that, if signatures are supported, we only reuse the device if the previous mount used the |
1947 | * same settings, so that a previous unsigned mount will not be reused if the user asks to use | |
28423d9a | 1948 | * signing for the new one, and vice versa. */ |
89e62e0b | 1949 | if (!!verity->root_hash_sig != !!(crypt_params.flags & CRYPT_VERITY_ROOT_HASH_SIGNATURE)) |
ac1f3ad0 LB |
1950 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Error opening verity device, it already exists but signature settings are not the same."); |
1951 | #endif | |
1952 | ||
1953 | *ret_cd = TAKE_PTR(cd); | |
1954 | return 0; | |
1955 | } | |
1956 | ||
75db809a | 1957 | static inline char* dm_deferred_remove_clean(char *name) { |
ac1f3ad0 | 1958 | if (!name) |
75db809a | 1959 | return NULL; |
0d12936d LP |
1960 | |
1961 | (void) sym_crypt_deactivate_by_name(NULL, name, CRYPT_DEACTIVATE_DEFERRED); | |
75db809a | 1962 | return mfree(name); |
ac1f3ad0 LB |
1963 | } |
1964 | DEFINE_TRIVIAL_CLEANUP_FUNC(char *, dm_deferred_remove_clean); | |
1965 | ||
4623e8e6 | 1966 | static int verity_partition( |
aee36b4e | 1967 | PartitionDesignator designator, |
4623e8e6 LP |
1968 | DissectedPartition *m, |
1969 | DissectedPartition *v, | |
89e62e0b | 1970 | const VeritySettings *verity, |
4623e8e6 LP |
1971 | DissectImageFlags flags, |
1972 | DecryptedImage *d) { | |
1973 | ||
0d12936d | 1974 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
ac1f3ad0 | 1975 | _cleanup_(dm_deferred_remove_cleanp) char *restore_deferred_remove = NULL; |
89e62e0b | 1976 | _cleanup_free_ char *node = NULL, *name = NULL; |
4623e8e6 LP |
1977 | int r; |
1978 | ||
1979 | assert(m); | |
89e62e0b | 1980 | assert(v || (verity && verity->data_path)); |
4623e8e6 | 1981 | |
89e62e0b | 1982 | if (!verity || !verity->root_hash) |
4623e8e6 | 1983 | return 0; |
aee36b4e LP |
1984 | if (!((verity->designator < 0 && designator == PARTITION_ROOT) || |
1985 | (verity->designator == designator))) | |
1986 | return 0; | |
4623e8e6 LP |
1987 | |
1988 | if (!m->found || !m->node || !m->fstype) | |
1989 | return 0; | |
89e62e0b | 1990 | if (!verity->data_path) { |
e7cbe5cb LB |
1991 | if (!v->found || !v->node || !v->fstype) |
1992 | return 0; | |
4623e8e6 | 1993 | |
e7cbe5cb LB |
1994 | if (!streq(v->fstype, "DM_verity_hash")) |
1995 | return 0; | |
1996 | } | |
4623e8e6 | 1997 | |
0d12936d LP |
1998 | r = dlopen_cryptsetup(); |
1999 | if (r < 0) | |
2000 | return r; | |
2001 | ||
ac1f3ad0 LB |
2002 | if (FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) { |
2003 | /* Use the roothash, which is unique per volume, as the device node name, so that it can be reused */ | |
2004 | _cleanup_free_ char *root_hash_encoded = NULL; | |
0d12936d | 2005 | |
89e62e0b | 2006 | root_hash_encoded = hexmem(verity->root_hash, verity->root_hash_size); |
ac1f3ad0 LB |
2007 | if (!root_hash_encoded) |
2008 | return -ENOMEM; | |
aee36b4e | 2009 | |
ac1f3ad0 LB |
2010 | r = make_dm_name_and_node(root_hash_encoded, "-verity", &name, &node); |
2011 | } else | |
2012 | r = make_dm_name_and_node(m->node, "-verity", &name, &node); | |
4623e8e6 LP |
2013 | if (r < 0) |
2014 | return r; | |
2015 | ||
89e62e0b | 2016 | r = sym_crypt_init(&cd, verity->data_path ?: v->node); |
4623e8e6 LP |
2017 | if (r < 0) |
2018 | return r; | |
2019 | ||
efc3b12f | 2020 | cryptsetup_enable_logging(cd); |
1887032f | 2021 | |
0d12936d | 2022 | r = sym_crypt_load(cd, CRYPT_VERITY, NULL); |
4623e8e6 | 2023 | if (r < 0) |
294bd454 | 2024 | return r; |
4623e8e6 | 2025 | |
0d12936d | 2026 | r = sym_crypt_set_data_device(cd, m->node); |
4623e8e6 | 2027 | if (r < 0) |
294bd454 | 2028 | return r; |
4623e8e6 | 2029 | |
319a4f4b | 2030 | if (!GREEDY_REALLOC0(d->decrypted, d->n_decrypted + 1)) |
ac1f3ad0 LB |
2031 | return -ENOMEM; |
2032 | ||
2033 | /* If activating fails because the device already exists, check the metadata and reuse it if it matches. | |
2034 | * In case of ENODEV/ENOENT, which can happen if another process is activating at the exact same time, | |
2035 | * retry a few times before giving up. */ | |
2036 | for (unsigned i = 0; i < N_DEVICE_NODE_LIST_ATTEMPTS; i++) { | |
89e62e0b | 2037 | if (verity->root_hash_sig) { |
c2923fdc | 2038 | #if HAVE_CRYPT_ACTIVATE_BY_SIGNED_KEY |
89e62e0b LP |
2039 | r = sym_crypt_activate_by_signed_key( |
2040 | cd, | |
2041 | name, | |
2042 | verity->root_hash, | |
2043 | verity->root_hash_size, | |
2044 | verity->root_hash_sig, | |
2045 | verity->root_hash_sig_size, | |
2046 | CRYPT_ACTIVATE_READONLY); | |
ac1f3ad0 | 2047 | #else |
22043172 LP |
2048 | r = log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), |
2049 | "Activation of verity device with signature requested, but not supported by %s due to missing crypt_activate_by_signed_key().", program_invocation_short_name); | |
ac1f3ad0 LB |
2050 | #endif |
2051 | } else | |
89e62e0b LP |
2052 | r = sym_crypt_activate_by_volume_key( |
2053 | cd, | |
2054 | name, | |
2055 | verity->root_hash, | |
2056 | verity->root_hash_size, | |
2057 | CRYPT_ACTIVATE_READONLY); | |
ac1f3ad0 LB |
2058 | /* libdevmapper can return EINVAL when the device is already in the activation stage. |
2059 | * There's no way to distinguish this situation from a genuine error due to invalid | |
2aed63f4 | 2060 | * parameters, so immediately fall back to activating the device with a unique name. |
89e62e0b LP |
2061 | * Improvements in libcrypsetup can ensure this never happens: |
2062 | * https://gitlab.com/cryptsetup/cryptsetup/-/merge_requests/96 */ | |
ac1f3ad0 | 2063 | if (r == -EINVAL && FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) |
aee36b4e | 2064 | return verity_partition(designator, m, v, verity, flags & ~DISSECT_IMAGE_VERITY_SHARE, d); |
9ecb5c10 | 2065 | if (!IN_SET(r, |
22043172 | 2066 | 0, /* Success */ |
9ecb5c10 | 2067 | -EEXIST, /* Volume is already open and ready to be used */ |
22043172 LP |
2068 | -EBUSY, /* Volume is being opened but not ready, crypt_init_by_name can fetch details */ |
2069 | -ENODEV /* Volume is being opened but not ready, crypt_init_by_name would fail, try to open again */)) | |
ac1f3ad0 | 2070 | return r; |
9ecb5c10 | 2071 | if (IN_SET(r, -EEXIST, -EBUSY)) { |
ac1f3ad0 | 2072 | struct crypt_device *existing_cd = NULL; |
c2923fdc | 2073 | |
ac1f3ad0 LB |
2074 | if (!restore_deferred_remove){ |
2075 | /* To avoid races, disable automatic removal on umount while setting up the new device. Restore it on failure. */ | |
2076 | r = dm_deferred_remove_cancel(name); | |
9ecb5c10 LB |
2077 | /* If activation returns EBUSY there might be no deferred removal to cancel, that's fine */ |
2078 | if (r < 0 && r != -ENXIO) | |
ac1f3ad0 | 2079 | return log_debug_errno(r, "Disabling automated deferred removal for verity device %s failed: %m", node); |
9ecb5c10 LB |
2080 | if (r == 0) { |
2081 | restore_deferred_remove = strdup(name); | |
2082 | if (!restore_deferred_remove) | |
2083 | return -ENOMEM; | |
2084 | } | |
ac1f3ad0 | 2085 | } |
c2923fdc | 2086 | |
89e62e0b | 2087 | r = verity_can_reuse(verity, name, &existing_cd); |
ac1f3ad0 LB |
2088 | /* Same as above, -EINVAL can randomly happen when it actually means -EEXIST */ |
2089 | if (r == -EINVAL && FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) | |
aee36b4e | 2090 | return verity_partition(designator, m, v, verity, flags & ~DISSECT_IMAGE_VERITY_SHARE, d); |
9ecb5c10 | 2091 | if (!IN_SET(r, 0, -ENODEV, -ENOENT, -EBUSY)) |
ac1f3ad0 LB |
2092 | return log_debug_errno(r, "Checking whether existing verity device %s can be reused failed: %m", node); |
2093 | if (r == 0) { | |
c419b6f0 LB |
2094 | /* devmapper might say that the device exists, but the devlink might not yet have been |
2095 | * created. Check and wait for the udev event in that case. */ | |
9e3d9067 | 2096 | r = device_wait_for_devlink(node, "block", usec_add(now(CLOCK_MONOTONIC), 100 * USEC_PER_MSEC), NULL); |
c419b6f0 LB |
2097 | /* Fallback to activation with a unique device if it's taking too long */ |
2098 | if (r == -ETIMEDOUT) | |
2099 | break; | |
2100 | if (r < 0) | |
2101 | return r; | |
2102 | ||
ac1f3ad0 | 2103 | if (cd) |
0d12936d | 2104 | sym_crypt_free(cd); |
ac1f3ad0 LB |
2105 | cd = existing_cd; |
2106 | } | |
c2923fdc | 2107 | } |
ac1f3ad0 LB |
2108 | if (r == 0) |
2109 | break; | |
ecab4c47 LB |
2110 | |
2111 | /* Device is being opened by another process, but it has not finished yet, yield for 2ms */ | |
2112 | (void) usleep(2 * USEC_PER_MSEC); | |
ac1f3ad0 LB |
2113 | } |
2114 | ||
ac1f3ad0 LB |
2115 | /* An existing verity device was reported by libcryptsetup/libdevmapper, but we can't use it at this time. |
2116 | * Fall back to activating it with a unique device name. */ | |
2117 | if (r != 0 && FLAGS_SET(flags, DISSECT_IMAGE_VERITY_SHARE)) | |
aee36b4e | 2118 | return verity_partition(designator, m, v, verity, flags & ~DISSECT_IMAGE_VERITY_SHARE, d); |
ac1f3ad0 LB |
2119 | |
2120 | /* Everything looks good and we'll be able to mount the device, so deferred remove will be re-enabled at that point. */ | |
2121 | restore_deferred_remove = mfree(restore_deferred_remove); | |
4623e8e6 | 2122 | |
94344385 LP |
2123 | d->decrypted[d->n_decrypted++] = (DecryptedPartition) { |
2124 | .name = TAKE_PTR(name), | |
2125 | .device = TAKE_PTR(cd), | |
2126 | }; | |
4623e8e6 | 2127 | |
1cc6c93a | 2128 | m->decrypted_node = TAKE_PTR(node); |
4623e8e6 LP |
2129 | |
2130 | return 0; | |
18b5886e LP |
2131 | } |
2132 | #endif | |
2133 | ||
2134 | int dissected_image_decrypt( | |
2135 | DissectedImage *m, | |
2136 | const char *passphrase, | |
89e62e0b | 2137 | const VeritySettings *verity, |
18b5886e LP |
2138 | DissectImageFlags flags, |
2139 | DecryptedImage **ret) { | |
2140 | ||
349cc4a5 | 2141 | #if HAVE_LIBCRYPTSETUP |
49b5b3b4 | 2142 | _cleanup_(decrypted_image_unrefp) DecryptedImage *d = NULL; |
18b5886e LP |
2143 | int r; |
2144 | #endif | |
2145 | ||
2146 | assert(m); | |
89e62e0b | 2147 | assert(!verity || verity->root_hash || verity->root_hash_size == 0); |
18b5886e LP |
2148 | |
2149 | /* Returns: | |
2150 | * | |
2151 | * = 0 → There was nothing to decrypt | |
2152 | * > 0 → Decrypted successfully | |
d1c536f5 | 2153 | * -ENOKEY → There's something to decrypt but no key was supplied |
18b5886e LP |
2154 | * -EKEYREJECTED → Passed key was not correct |
2155 | */ | |
2156 | ||
89e62e0b | 2157 | if (verity && verity->root_hash && verity->root_hash_size < sizeof(sd_id128_t)) |
4623e8e6 LP |
2158 | return -EINVAL; |
2159 | ||
2160 | if (!m->encrypted && !m->verity) { | |
18b5886e LP |
2161 | *ret = NULL; |
2162 | return 0; | |
2163 | } | |
2164 | ||
349cc4a5 | 2165 | #if HAVE_LIBCRYPTSETUP |
18b5886e LP |
2166 | d = new0(DecryptedImage, 1); |
2167 | if (!d) | |
2168 | return -ENOMEM; | |
2169 | ||
569a0e42 | 2170 | for (PartitionDesignator i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) { |
18b5886e | 2171 | DissectedPartition *p = m->partitions + i; |
22043172 | 2172 | PartitionDesignator k; |
18b5886e LP |
2173 | |
2174 | if (!p->found) | |
2175 | continue; | |
2176 | ||
2177 | r = decrypt_partition(p, passphrase, flags, d); | |
2178 | if (r < 0) | |
2179 | return r; | |
2180 | ||
4623e8e6 LP |
2181 | k = PARTITION_VERITY_OF(i); |
2182 | if (k >= 0) { | |
aee36b4e | 2183 | r = verity_partition(i, p, m->partitions + k, verity, flags | DISSECT_IMAGE_VERITY_SHARE, d); |
4623e8e6 LP |
2184 | if (r < 0) |
2185 | return r; | |
2186 | } | |
2187 | ||
18b5886e LP |
2188 | if (!p->decrypted_fstype && p->decrypted_node) { |
2189 | r = probe_filesystem(p->decrypted_node, &p->decrypted_fstype); | |
7cc84b2c | 2190 | if (r < 0 && r != -EUCLEAN) |
18b5886e LP |
2191 | return r; |
2192 | } | |
2193 | } | |
2194 | ||
1cc6c93a | 2195 | *ret = TAKE_PTR(d); |
18b5886e LP |
2196 | |
2197 | return 1; | |
2198 | #else | |
2199 | return -EOPNOTSUPP; | |
2200 | #endif | |
2201 | } | |
2202 | ||
2203 | int dissected_image_decrypt_interactively( | |
2204 | DissectedImage *m, | |
2205 | const char *passphrase, | |
89e62e0b | 2206 | const VeritySettings *verity, |
18b5886e LP |
2207 | DissectImageFlags flags, |
2208 | DecryptedImage **ret) { | |
2209 | ||
2210 | _cleanup_strv_free_erase_ char **z = NULL; | |
2211 | int n = 3, r; | |
2212 | ||
2213 | if (passphrase) | |
2214 | n--; | |
2215 | ||
2216 | for (;;) { | |
89e62e0b | 2217 | r = dissected_image_decrypt(m, passphrase, verity, flags, ret); |
18b5886e LP |
2218 | if (r >= 0) |
2219 | return r; | |
2220 | if (r == -EKEYREJECTED) | |
2221 | log_error_errno(r, "Incorrect passphrase, try again!"); | |
fc95c359 YW |
2222 | else if (r != -ENOKEY) |
2223 | return log_error_errno(r, "Failed to decrypt image: %m"); | |
18b5886e | 2224 | |
baaa35ad ZJS |
2225 | if (--n < 0) |
2226 | return log_error_errno(SYNTHETIC_ERRNO(EKEYREJECTED), | |
2227 | "Too many retries."); | |
18b5886e LP |
2228 | |
2229 | z = strv_free(z); | |
2230 | ||
8806bb4b | 2231 | r = ask_password_auto("Please enter image passphrase:", NULL, "dissect", "dissect", "dissect.passphrase", USEC_INFINITY, 0, &z); |
18b5886e LP |
2232 | if (r < 0) |
2233 | return log_error_errno(r, "Failed to query for passphrase: %m"); | |
2234 | ||
2235 | passphrase = z[0]; | |
2236 | } | |
2237 | } | |
2238 | ||
18b5886e | 2239 | int decrypted_image_relinquish(DecryptedImage *d) { |
18b5886e LP |
2240 | assert(d); |
2241 | ||
67f63ee5 ZJS |
2242 | /* Turns on automatic removal after the last use ended for all DM devices of this image, and sets a |
2243 | * boolean so that we don't clean it up ourselves either anymore */ | |
18b5886e | 2244 | |
349cc4a5 | 2245 | #if HAVE_LIBCRYPTSETUP |
67f63ee5 ZJS |
2246 | int r; |
2247 | ||
2248 | for (size_t i = 0; i < d->n_decrypted; i++) { | |
18b5886e LP |
2249 | DecryptedPartition *p = d->decrypted + i; |
2250 | ||
2251 | if (p->relinquished) | |
2252 | continue; | |
2253 | ||
0d12936d | 2254 | r = sym_crypt_deactivate_by_name(NULL, p->name, CRYPT_DEACTIVATE_DEFERRED); |
18b5886e LP |
2255 | if (r < 0) |
2256 | return log_debug_errno(r, "Failed to mark %s for auto-removal: %m", p->name); | |
2257 | ||
2258 | p->relinquished = true; | |
2259 | } | |
2260 | #endif | |
2261 | ||
2262 | return 0; | |
2263 | } | |
2264 | ||
89e62e0b LP |
2265 | static char *build_auxiliary_path(const char *image, const char *suffix) { |
2266 | const char *e; | |
2267 | char *n; | |
2268 | ||
2269 | assert(image); | |
2270 | assert(suffix); | |
2271 | ||
2272 | e = endswith(image, ".raw"); | |
2273 | if (!e) | |
2274 | return strjoin(e, suffix); | |
2275 | ||
2276 | n = new(char, e - image + strlen(suffix) + 1); | |
2277 | if (!n) | |
2278 | return NULL; | |
2279 | ||
2280 | strcpy(mempcpy(n, image, e - image), suffix); | |
2281 | return n; | |
2282 | } | |
2283 | ||
2284 | void verity_settings_done(VeritySettings *v) { | |
2285 | assert(v); | |
2286 | ||
2287 | v->root_hash = mfree(v->root_hash); | |
2288 | v->root_hash_size = 0; | |
2289 | ||
2290 | v->root_hash_sig = mfree(v->root_hash_sig); | |
2291 | v->root_hash_sig_size = 0; | |
2292 | ||
2293 | v->data_path = mfree(v->data_path); | |
2294 | } | |
2295 | ||
2296 | int verity_settings_load( | |
2297 | VeritySettings *verity, | |
f5ea63a5 LP |
2298 | const char *image, |
2299 | const char *root_hash_path, | |
89e62e0b LP |
2300 | const char *root_hash_sig_path) { |
2301 | ||
2302 | _cleanup_free_ void *root_hash = NULL, *root_hash_sig = NULL; | |
2303 | size_t root_hash_size = 0, root_hash_sig_size = 0; | |
2304 | _cleanup_free_ char *verity_data_path = NULL; | |
aee36b4e | 2305 | PartitionDesignator designator; |
78ebe980 LP |
2306 | int r; |
2307 | ||
89e62e0b | 2308 | assert(verity); |
78ebe980 | 2309 | assert(image); |
aee36b4e | 2310 | assert(verity->designator < 0 || IN_SET(verity->designator, PARTITION_ROOT, PARTITION_USR)); |
78ebe980 | 2311 | |
89e62e0b LP |
2312 | /* If we are asked to load the root hash for a device node, exit early */ |
2313 | if (is_device_path(image)) | |
78ebe980 | 2314 | return 0; |
78ebe980 | 2315 | |
aee36b4e LP |
2316 | designator = verity->designator; |
2317 | ||
89e62e0b | 2318 | /* We only fill in what isn't already filled in */ |
c2923fdc | 2319 | |
89e62e0b | 2320 | if (!verity->root_hash) { |
e7cbe5cb | 2321 | _cleanup_free_ char *text = NULL; |
e7cbe5cb | 2322 | |
0389f4fa | 2323 | if (root_hash_path) { |
aee36b4e | 2324 | /* If explicitly specified it takes precedence */ |
0389f4fa LB |
2325 | r = read_one_line_file(root_hash_path, &text); |
2326 | if (r < 0) | |
e7cbe5cb | 2327 | return r; |
aee36b4e LP |
2328 | |
2329 | if (designator < 0) | |
2330 | designator = PARTITION_ROOT; | |
0389f4fa | 2331 | } else { |
aee36b4e LP |
2332 | /* Otherwise look for xattr and separate file, and first for the data for root and if |
2333 | * that doesn't exist for /usr */ | |
0389f4fa | 2334 | |
aee36b4e LP |
2335 | if (designator < 0 || designator == PARTITION_ROOT) { |
2336 | r = getxattr_malloc(image, "user.verity.roothash", &text, true); | |
2337 | if (r < 0) { | |
2338 | _cleanup_free_ char *p = NULL; | |
78ebe980 | 2339 | |
aee36b4e LP |
2340 | if (!IN_SET(r, -ENODATA, -ENOENT) && !ERRNO_IS_NOT_SUPPORTED(r)) |
2341 | return r; | |
e7cbe5cb | 2342 | |
aee36b4e LP |
2343 | p = build_auxiliary_path(image, ".roothash"); |
2344 | if (!p) | |
2345 | return -ENOMEM; | |
2346 | ||
2347 | r = read_one_line_file(p, &text); | |
2348 | if (r < 0 && r != -ENOENT) | |
2349 | return r; | |
2350 | } | |
2351 | ||
2352 | if (text) | |
2353 | designator = PARTITION_ROOT; | |
2354 | } | |
2355 | ||
2356 | if (!text && (designator < 0 || designator == PARTITION_USR)) { | |
2357 | /* So in the "roothash" xattr/file name above the "root" of course primarily | |
2358 | * refers to the root of the Verity Merkle tree. But coincidentally it also | |
2359 | * is the hash for the *root* file system, i.e. the "root" neatly refers to | |
2360 | * two distinct concepts called "root". Taking benefit of this happy | |
2361 | * coincidence we call the file with the root hash for the /usr/ file system | |
2362 | * `usrhash`, because `usrroothash` or `rootusrhash` would just be too | |
2363 | * confusing. We thus drop the reference to the root of the Merkle tree, and | |
2364 | * just indicate which file system it's about. */ | |
2365 | r = getxattr_malloc(image, "user.verity.usrhash", &text, true); | |
2366 | if (r < 0) { | |
2367 | _cleanup_free_ char *p = NULL; | |
2368 | ||
2369 | if (!IN_SET(r, -ENODATA, -ENOENT) && !ERRNO_IS_NOT_SUPPORTED(r)) | |
2370 | return r; | |
2371 | ||
2372 | p = build_auxiliary_path(image, ".usrhash"); | |
2373 | if (!p) | |
2374 | return -ENOMEM; | |
2375 | ||
2376 | r = read_one_line_file(p, &text); | |
2377 | if (r < 0 && r != -ENOENT) | |
2378 | return r; | |
2379 | } | |
2380 | ||
2381 | if (text) | |
2382 | designator = PARTITION_USR; | |
0389f4fa | 2383 | } |
e7cbe5cb LB |
2384 | } |
2385 | ||
2386 | if (text) { | |
89e62e0b | 2387 | r = unhexmem(text, strlen(text), &root_hash, &root_hash_size); |
e7cbe5cb LB |
2388 | if (r < 0) |
2389 | return r; | |
89e62e0b | 2390 | if (root_hash_size < sizeof(sd_id128_t)) |
e7cbe5cb LB |
2391 | return -EINVAL; |
2392 | } | |
2393 | } | |
2394 | ||
90f98986 | 2395 | if ((root_hash || verity->root_hash) && !verity->root_hash_sig) { |
aee36b4e | 2396 | if (root_hash_sig_path) { |
ae9cf30b | 2397 | r = read_full_file(root_hash_sig_path, (char**) &root_hash_sig, &root_hash_sig_size); |
aee36b4e LP |
2398 | if (r < 0 && r != -ENOENT) |
2399 | return r; | |
2400 | ||
2401 | if (designator < 0) | |
2402 | designator = PARTITION_ROOT; | |
2403 | } else { | |
2404 | if (designator < 0 || designator == PARTITION_ROOT) { | |
2405 | _cleanup_free_ char *p = NULL; | |
2406 | ||
2407 | /* Follow naming convention recommended by the relevant RFC: | |
2408 | * https://tools.ietf.org/html/rfc5751#section-3.2.1 */ | |
2409 | p = build_auxiliary_path(image, ".roothash.p7s"); | |
2410 | if (!p) | |
2411 | return -ENOMEM; | |
89e62e0b | 2412 | |
ae9cf30b | 2413 | r = read_full_file(p, (char**) &root_hash_sig, &root_hash_sig_size); |
aee36b4e LP |
2414 | if (r < 0 && r != -ENOENT) |
2415 | return r; | |
2416 | if (r >= 0) | |
2417 | designator = PARTITION_ROOT; | |
2418 | } | |
2419 | ||
2420 | if (!root_hash_sig && (designator < 0 || designator == PARTITION_USR)) { | |
2421 | _cleanup_free_ char *p = NULL; | |
2422 | ||
2423 | p = build_auxiliary_path(image, ".usrhash.p7s"); | |
2424 | if (!p) | |
2425 | return -ENOMEM; | |
89e62e0b | 2426 | |
ae9cf30b | 2427 | r = read_full_file(p, (char**) &root_hash_sig, &root_hash_sig_size); |
aee36b4e LP |
2428 | if (r < 0 && r != -ENOENT) |
2429 | return r; | |
2430 | if (r >= 0) | |
2431 | designator = PARTITION_USR; | |
2432 | } | |
89e62e0b LP |
2433 | } |
2434 | ||
aee36b4e | 2435 | if (root_hash_sig && root_hash_sig_size == 0) /* refuse empty size signatures */ |
89e62e0b LP |
2436 | return -EINVAL; |
2437 | } | |
2438 | ||
2439 | if (!verity->data_path) { | |
2440 | _cleanup_free_ char *p = NULL; | |
2441 | ||
2442 | p = build_auxiliary_path(image, ".verity"); | |
2443 | if (!p) | |
2444 | return -ENOMEM; | |
2445 | ||
2446 | if (access(p, F_OK) < 0) { | |
2447 | if (errno != ENOENT) | |
2448 | return -errno; | |
2449 | } else | |
2450 | verity_data_path = TAKE_PTR(p); | |
2451 | } | |
2452 | ||
2453 | if (root_hash) { | |
2454 | verity->root_hash = TAKE_PTR(root_hash); | |
2455 | verity->root_hash_size = root_hash_size; | |
2456 | } | |
2457 | ||
2458 | if (root_hash_sig) { | |
2459 | verity->root_hash_sig = TAKE_PTR(root_hash_sig); | |
2460 | verity->root_hash_sig_size = root_hash_sig_size; | |
e7cbe5cb | 2461 | } |
89e62e0b LP |
2462 | |
2463 | if (verity_data_path) | |
2464 | verity->data_path = TAKE_PTR(verity_data_path); | |
78ebe980 | 2465 | |
aee36b4e LP |
2466 | if (verity->designator < 0) |
2467 | verity->designator = designator; | |
2468 | ||
78ebe980 LP |
2469 | return 1; |
2470 | } | |
2471 | ||
3b925504 LP |
2472 | int dissected_image_acquire_metadata(DissectedImage *m) { |
2473 | ||
2474 | enum { | |
2475 | META_HOSTNAME, | |
2476 | META_MACHINE_ID, | |
2477 | META_MACHINE_INFO, | |
2478 | META_OS_RELEASE, | |
7718ac97 | 2479 | META_EXTENSION_RELEASE, |
3b925504 LP |
2480 | _META_MAX, |
2481 | }; | |
2482 | ||
7718ac97 LB |
2483 | static const char *paths[_META_MAX] = { |
2484 | [META_HOSTNAME] = "/etc/hostname\0", | |
2485 | [META_MACHINE_ID] = "/etc/machine-id\0", | |
2486 | [META_MACHINE_INFO] = "/etc/machine-info\0", | |
7533a33b LP |
2487 | [META_OS_RELEASE] = "/etc/os-release\0" |
2488 | "/usr/lib/os-release\0", | |
7718ac97 | 2489 | [META_EXTENSION_RELEASE] = NULL, |
3b925504 LP |
2490 | }; |
2491 | ||
7718ac97 | 2492 | _cleanup_strv_free_ char **machine_info = NULL, **os_release = NULL, **extension_release = NULL; |
af8219d5 | 2493 | _cleanup_close_pair_ int error_pipe[2] = { -1, -1 }; |
3b925504 LP |
2494 | _cleanup_(rmdir_and_freep) char *t = NULL; |
2495 | _cleanup_(sigkill_waitp) pid_t child = 0; | |
2496 | sd_id128_t machine_id = SD_ID128_NULL; | |
2497 | _cleanup_free_ char *hostname = NULL; | |
67f63ee5 | 2498 | unsigned n_meta_initialized = 0; |
af8219d5 LP |
2499 | int fds[2 * _META_MAX], r, v; |
2500 | ssize_t n; | |
3b925504 LP |
2501 | |
2502 | BLOCK_SIGNALS(SIGCHLD); | |
2503 | ||
2504 | assert(m); | |
2505 | ||
7718ac97 LB |
2506 | /* As per the os-release spec, if the image is an extension it will have a file |
2507 | * named after the image name in extension-release.d/ */ | |
4f67a5d9 | 2508 | if (m->image_name) { |
794a579f LP |
2509 | char *ext; |
2510 | ||
2511 | ext = strjoina("/usr/lib/extension-release.d/extension-release.", m->image_name, "0"); | |
4f67a5d9 LB |
2512 | ext[strlen(ext) - 1] = '\0'; /* Extra \0 for NULSTR_FOREACH using placeholder from above */ |
2513 | paths[META_EXTENSION_RELEASE] = ext; | |
2514 | } else | |
7718ac97 LB |
2515 | log_debug("No image name available, will skip extension-release metadata"); |
2516 | ||
2517 | for (; n_meta_initialized < _META_MAX; n_meta_initialized ++) { | |
d9119c00 LP |
2518 | if (!paths[n_meta_initialized]) { |
2519 | fds[2*n_meta_initialized] = fds[2*n_meta_initialized+1] = -1; | |
7718ac97 | 2520 | continue; |
d9119c00 LP |
2521 | } |
2522 | ||
3b925504 LP |
2523 | if (pipe2(fds + 2*n_meta_initialized, O_CLOEXEC) < 0) { |
2524 | r = -errno; | |
2525 | goto finish; | |
2526 | } | |
7718ac97 | 2527 | } |
3b925504 LP |
2528 | |
2529 | r = mkdtemp_malloc("/tmp/dissect-XXXXXX", &t); | |
2530 | if (r < 0) | |
2531 | goto finish; | |
2532 | ||
af8219d5 LP |
2533 | if (pipe2(error_pipe, O_CLOEXEC) < 0) { |
2534 | r = -errno; | |
2535 | goto finish; | |
2536 | } | |
2537 | ||
e2047ba9 | 2538 | r = safe_fork("(sd-dissect)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_NEW_MOUNTNS|FORK_MOUNTNS_SLAVE, &child); |
be39f6ee | 2539 | if (r < 0) |
3b925504 | 2540 | goto finish; |
be39f6ee | 2541 | if (r == 0) { |
af8219d5 LP |
2542 | error_pipe[0] = safe_close(error_pipe[0]); |
2543 | ||
7cf66030 LP |
2544 | r = dissected_image_mount( |
2545 | m, | |
2546 | t, | |
2547 | UID_INVALID, | |
21b61b1d | 2548 | UID_INVALID, |
7cf66030 LP |
2549 | DISSECT_IMAGE_READ_ONLY| |
2550 | DISSECT_IMAGE_MOUNT_ROOT_ONLY| | |
2551 | DISSECT_IMAGE_VALIDATE_OS| | |
2552 | DISSECT_IMAGE_USR_NO_ROOT); | |
429d4e41 | 2553 | if (r < 0) { |
af8219d5 LP |
2554 | /* Let parent know the error */ |
2555 | (void) write(error_pipe[1], &r, sizeof(r)); | |
2556 | ||
429d4e41 | 2557 | log_debug_errno(r, "Failed to mount dissected image: %m"); |
3b925504 | 2558 | _exit(EXIT_FAILURE); |
429d4e41 | 2559 | } |
3b925504 | 2560 | |
67f63ee5 | 2561 | for (unsigned k = 0; k < _META_MAX; k++) { |
37e44c3f | 2562 | _cleanup_close_ int fd = -ENOENT; |
3b925504 LP |
2563 | const char *p; |
2564 | ||
7718ac97 LB |
2565 | if (!paths[k]) |
2566 | continue; | |
2567 | ||
3b925504 LP |
2568 | fds[2*k] = safe_close(fds[2*k]); |
2569 | ||
2570 | NULSTR_FOREACH(p, paths[k]) { | |
36952d19 | 2571 | fd = chase_symlinks_and_open(p, t, CHASE_PREFIX_ROOT, O_RDONLY|O_CLOEXEC|O_NOCTTY, NULL); |
3b925504 LP |
2572 | if (fd >= 0) |
2573 | break; | |
2574 | } | |
36952d19 LP |
2575 | if (fd < 0) { |
2576 | log_debug_errno(fd, "Failed to read %s file of image, ignoring: %m", paths[k]); | |
37e44c3f | 2577 | fds[2*k+1] = safe_close(fds[2*k+1]); |
3b925504 | 2578 | continue; |
36952d19 | 2579 | } |
3b925504 | 2580 | |
f5fbe71d | 2581 | r = copy_bytes(fd, fds[2*k+1], UINT64_MAX, 0); |
af8219d5 LP |
2582 | if (r < 0) { |
2583 | (void) write(error_pipe[1], &r, sizeof(r)); | |
3b925504 | 2584 | _exit(EXIT_FAILURE); |
af8219d5 | 2585 | } |
3b925504 LP |
2586 | |
2587 | fds[2*k+1] = safe_close(fds[2*k+1]); | |
2588 | } | |
2589 | ||
2590 | _exit(EXIT_SUCCESS); | |
2591 | } | |
2592 | ||
af8219d5 LP |
2593 | error_pipe[1] = safe_close(error_pipe[1]); |
2594 | ||
67f63ee5 | 2595 | for (unsigned k = 0; k < _META_MAX; k++) { |
3b925504 LP |
2596 | _cleanup_fclose_ FILE *f = NULL; |
2597 | ||
7718ac97 LB |
2598 | if (!paths[k]) |
2599 | continue; | |
2600 | ||
3b925504 LP |
2601 | fds[2*k+1] = safe_close(fds[2*k+1]); |
2602 | ||
4fa744a3 | 2603 | f = take_fdopen(&fds[2*k], "r"); |
3b925504 LP |
2604 | if (!f) { |
2605 | r = -errno; | |
2606 | goto finish; | |
2607 | } | |
2608 | ||
3b925504 LP |
2609 | switch (k) { |
2610 | ||
2611 | case META_HOSTNAME: | |
2612 | r = read_etc_hostname_stream(f, &hostname); | |
2613 | if (r < 0) | |
2614 | log_debug_errno(r, "Failed to read /etc/hostname: %m"); | |
2615 | ||
2616 | break; | |
2617 | ||
2618 | case META_MACHINE_ID: { | |
2619 | _cleanup_free_ char *line = NULL; | |
2620 | ||
2621 | r = read_line(f, LONG_LINE_MAX, &line); | |
2622 | if (r < 0) | |
2623 | log_debug_errno(r, "Failed to read /etc/machine-id: %m"); | |
2624 | else if (r == 33) { | |
2625 | r = sd_id128_from_string(line, &machine_id); | |
2626 | if (r < 0) | |
2627 | log_debug_errno(r, "Image contains invalid /etc/machine-id: %s", line); | |
2628 | } else if (r == 0) | |
2629 | log_debug("/etc/machine-id file is empty."); | |
ab763cb2 HS |
2630 | else if (streq(line, "uninitialized")) |
2631 | log_debug("/etc/machine-id file is uninitialized (likely aborted first boot)."); | |
3b925504 LP |
2632 | else |
2633 | log_debug("/etc/machine-id has unexpected length %i.", r); | |
2634 | ||
2635 | break; | |
2636 | } | |
2637 | ||
2638 | case META_MACHINE_INFO: | |
aa8fbc74 | 2639 | r = load_env_file_pairs(f, "machine-info", &machine_info); |
3b925504 LP |
2640 | if (r < 0) |
2641 | log_debug_errno(r, "Failed to read /etc/machine-info: %m"); | |
2642 | ||
2643 | break; | |
2644 | ||
2645 | case META_OS_RELEASE: | |
aa8fbc74 | 2646 | r = load_env_file_pairs(f, "os-release", &os_release); |
3b925504 LP |
2647 | if (r < 0) |
2648 | log_debug_errno(r, "Failed to read OS release file: %m"); | |
2649 | ||
2650 | break; | |
7718ac97 LB |
2651 | |
2652 | case META_EXTENSION_RELEASE: | |
2653 | r = load_env_file_pairs(f, "extension-release", &extension_release); | |
2654 | if (r < 0) | |
2655 | log_debug_errno(r, "Failed to read extension release file: %m"); | |
2656 | ||
2657 | break; | |
3b925504 LP |
2658 | } |
2659 | } | |
2660 | ||
2e87a1fd | 2661 | r = wait_for_terminate_and_check("(sd-dissect)", child, 0); |
3b925504 | 2662 | child = 0; |
2e87a1fd | 2663 | if (r < 0) |
af8219d5 LP |
2664 | return r; |
2665 | ||
2666 | n = read(error_pipe[0], &v, sizeof(v)); | |
2667 | if (n < 0) | |
2668 | return -errno; | |
2669 | if (n == sizeof(v)) | |
2670 | return v; /* propagate error sent to us from child */ | |
2671 | if (n != 0) | |
2672 | return -EIO; | |
2673 | ||
2e87a1fd LP |
2674 | if (r != EXIT_SUCCESS) |
2675 | return -EPROTO; | |
3b925504 LP |
2676 | |
2677 | free_and_replace(m->hostname, hostname); | |
2678 | m->machine_id = machine_id; | |
2679 | strv_free_and_replace(m->machine_info, machine_info); | |
2680 | strv_free_and_replace(m->os_release, os_release); | |
7718ac97 | 2681 | strv_free_and_replace(m->extension_release, extension_release); |
3b925504 LP |
2682 | |
2683 | finish: | |
67f63ee5 | 2684 | for (unsigned k = 0; k < n_meta_initialized; k++) |
3b925504 LP |
2685 | safe_close_pair(fds + 2*k); |
2686 | ||
2687 | return r; | |
2688 | } | |
2689 | ||
4526113f LP |
2690 | int dissect_image_and_warn( |
2691 | int fd, | |
2692 | const char *name, | |
89e62e0b | 2693 | const VeritySettings *verity, |
18d73705 | 2694 | const MountOptions *mount_options, |
75dc190d | 2695 | uint64_t uevent_seqnum_not_before, |
4a62257d | 2696 | usec_t timestamp_not_before, |
4526113f LP |
2697 | DissectImageFlags flags, |
2698 | DissectedImage **ret) { | |
2699 | ||
2700 | _cleanup_free_ char *buffer = NULL; | |
2701 | int r; | |
2702 | ||
2703 | if (!name) { | |
2704 | r = fd_get_path(fd, &buffer); | |
2705 | if (r < 0) | |
2706 | return r; | |
2707 | ||
2708 | name = buffer; | |
2709 | } | |
2710 | ||
4a62257d | 2711 | r = dissect_image(fd, verity, mount_options, uevent_seqnum_not_before, timestamp_not_before, flags, ret); |
4526113f LP |
2712 | switch (r) { |
2713 | ||
2714 | case -EOPNOTSUPP: | |
2715 | return log_error_errno(r, "Dissecting images is not supported, compiled without blkid support."); | |
2716 | ||
2717 | case -ENOPKG: | |
2718 | return log_error_errno(r, "Couldn't identify a suitable partition table or file system in '%s'.", name); | |
2719 | ||
2720 | case -EADDRNOTAVAIL: | |
2721 | return log_error_errno(r, "No root partition for specified root hash found in '%s'.", name); | |
2722 | ||
2723 | case -ENOTUNIQ: | |
2724 | return log_error_errno(r, "Multiple suitable root partitions found in image '%s'.", name); | |
2725 | ||
2726 | case -ENXIO: | |
2727 | return log_error_errno(r, "No suitable root partition found in image '%s'.", name); | |
2728 | ||
2729 | case -EPROTONOSUPPORT: | |
2730 | return log_error_errno(r, "Device '%s' is loopback block device with partition scanning turned off, please turn it on.", name); | |
2731 | ||
2732 | default: | |
2733 | if (r < 0) | |
2734 | return log_error_errno(r, "Failed to dissect image '%s': %m", name); | |
2735 | ||
2736 | return r; | |
2737 | } | |
2738 | } | |
2739 | ||
569a0e42 | 2740 | bool dissected_image_can_do_verity(const DissectedImage *image, PartitionDesignator partition_designator) { |
e7cbe5cb LB |
2741 | if (image->single_file_system) |
2742 | return partition_designator == PARTITION_ROOT && image->can_verity; | |
2743 | ||
2744 | return PARTITION_VERITY_OF(partition_designator) >= 0; | |
2745 | } | |
2746 | ||
569a0e42 | 2747 | bool dissected_image_has_verity(const DissectedImage *image, PartitionDesignator partition_designator) { |
e7cbe5cb LB |
2748 | int k; |
2749 | ||
2750 | if (image->single_file_system) | |
2751 | return partition_designator == PARTITION_ROOT && image->verity; | |
2752 | ||
2753 | k = PARTITION_VERITY_OF(partition_designator); | |
2754 | return k >= 0 && image->partitions[k].found; | |
2755 | } | |
2756 | ||
18d73705 LB |
2757 | MountOptions* mount_options_free_all(MountOptions *options) { |
2758 | MountOptions *m; | |
2759 | ||
2760 | while ((m = options)) { | |
2761 | LIST_REMOVE(mount_options, options, m); | |
2762 | free(m->options); | |
2763 | free(m); | |
2764 | } | |
2765 | ||
2766 | return NULL; | |
2767 | } | |
2768 | ||
569a0e42 | 2769 | const char* mount_options_from_designator(const MountOptions *options, PartitionDesignator designator) { |
f5215bc8 | 2770 | const MountOptions *m; |
18d73705 | 2771 | |
f5215bc8 | 2772 | LIST_FOREACH(mount_options, m, options) |
9ece6444 | 2773 | if (designator == m->partition_designator && !isempty(m->options)) |
18d73705 | 2774 | return m->options; |
6aa05ebd | 2775 | |
18d73705 LB |
2776 | return NULL; |
2777 | } | |
2778 | ||
6aa05ebd LP |
2779 | int mount_image_privately_interactively( |
2780 | const char *image, | |
2781 | DissectImageFlags flags, | |
2782 | char **ret_directory, | |
2783 | LoopDevice **ret_loop_device, | |
2784 | DecryptedImage **ret_decrypted_image) { | |
2785 | ||
27ec815e | 2786 | _cleanup_(verity_settings_done) VeritySettings verity = VERITY_SETTINGS_DEFAULT; |
6aa05ebd LP |
2787 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; |
2788 | _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL; | |
2789 | _cleanup_(dissected_image_unrefp) DissectedImage *dissected_image = NULL; | |
2790 | _cleanup_(rmdir_and_freep) char *created_dir = NULL; | |
2791 | _cleanup_free_ char *temp = NULL; | |
2792 | int r; | |
2793 | ||
2794 | /* Mounts an OS image at a temporary place, inside a newly created mount namespace of our own. This | |
2795 | * is used by tools such as systemd-tmpfiles or systemd-firstboot to operate on some disk image | |
2796 | * easily. */ | |
2797 | ||
2798 | assert(image); | |
2799 | assert(ret_directory); | |
2800 | assert(ret_loop_device); | |
2801 | assert(ret_decrypted_image); | |
2802 | ||
27ec815e LP |
2803 | r = verity_settings_load(&verity, image, NULL, NULL); |
2804 | if (r < 0) | |
2805 | return log_error_errno(r, "Failed to load root hash data: %m"); | |
2806 | ||
6aa05ebd LP |
2807 | r = tempfn_random_child(NULL, program_invocation_short_name, &temp); |
2808 | if (r < 0) | |
2809 | return log_error_errno(r, "Failed to generate temporary mount directory: %m"); | |
2810 | ||
2811 | r = loop_device_make_by_path( | |
2812 | image, | |
ef9c184d | 2813 | FLAGS_SET(flags, DISSECT_IMAGE_DEVICE_READ_ONLY) ? O_RDONLY : O_RDWR, |
6aa05ebd LP |
2814 | FLAGS_SET(flags, DISSECT_IMAGE_NO_PARTITION_TABLE) ? 0 : LO_FLAGS_PARTSCAN, |
2815 | &d); | |
2816 | if (r < 0) | |
7b87fe4c | 2817 | return log_error_errno(r, "Failed to set up loopback device for %s: %m", image); |
6aa05ebd | 2818 | |
4a62257d | 2819 | r = dissect_image_and_warn(d->fd, image, &verity, NULL, d->uevent_seqnum_not_before, d->timestamp_not_before, flags, &dissected_image); |
6aa05ebd LP |
2820 | if (r < 0) |
2821 | return r; | |
2822 | ||
27ec815e | 2823 | r = dissected_image_decrypt_interactively(dissected_image, NULL, &verity, flags, &decrypted_image); |
6aa05ebd LP |
2824 | if (r < 0) |
2825 | return r; | |
2826 | ||
2827 | r = detach_mount_namespace(); | |
2828 | if (r < 0) | |
2829 | return log_error_errno(r, "Failed to detach mount namespace: %m"); | |
2830 | ||
2831 | r = mkdir_p(temp, 0700); | |
2832 | if (r < 0) | |
2833 | return log_error_errno(r, "Failed to create mount point: %m"); | |
2834 | ||
2835 | created_dir = TAKE_PTR(temp); | |
2836 | ||
21b61b1d | 2837 | r = dissected_image_mount_and_warn(dissected_image, created_dir, UID_INVALID, UID_INVALID, flags); |
6aa05ebd | 2838 | if (r < 0) |
af187ab2 | 2839 | return r; |
6aa05ebd LP |
2840 | |
2841 | if (decrypted_image) { | |
2842 | r = decrypted_image_relinquish(decrypted_image); | |
2843 | if (r < 0) | |
2844 | return log_error_errno(r, "Failed to relinquish DM devices: %m"); | |
2845 | } | |
2846 | ||
2847 | loop_device_relinquish(d); | |
2848 | ||
2849 | *ret_directory = TAKE_PTR(created_dir); | |
2850 | *ret_loop_device = TAKE_PTR(d); | |
2851 | *ret_decrypted_image = TAKE_PTR(decrypted_image); | |
2852 | ||
2853 | return 0; | |
2854 | } | |
2855 | ||
8c1be37e LP |
2856 | static const char *const partition_designator_table[] = { |
2857 | [PARTITION_ROOT] = "root", | |
2858 | [PARTITION_ROOT_SECONDARY] = "root-secondary", | |
aee36b4e LP |
2859 | [PARTITION_USR] = "usr", |
2860 | [PARTITION_USR_SECONDARY] = "usr-secondary", | |
8c1be37e LP |
2861 | [PARTITION_HOME] = "home", |
2862 | [PARTITION_SRV] = "srv", | |
2863 | [PARTITION_ESP] = "esp", | |
a8c47660 | 2864 | [PARTITION_XBOOTLDR] = "xbootldr", |
8c1be37e | 2865 | [PARTITION_SWAP] = "swap", |
4623e8e6 LP |
2866 | [PARTITION_ROOT_VERITY] = "root-verity", |
2867 | [PARTITION_ROOT_SECONDARY_VERITY] = "root-secondary-verity", | |
aee36b4e LP |
2868 | [PARTITION_USR_VERITY] = "usr-verity", |
2869 | [PARTITION_USR_SECONDARY_VERITY] = "usr-secondary-verity", | |
d4dffb85 LP |
2870 | [PARTITION_TMP] = "tmp", |
2871 | [PARTITION_VAR] = "var", | |
8c1be37e LP |
2872 | }; |
2873 | ||
93f59701 LB |
2874 | int verity_dissect_and_mount( |
2875 | const char *src, | |
2876 | const char *dest, | |
2877 | const MountOptions *options, | |
2878 | const char *required_host_os_release_id, | |
2879 | const char *required_host_os_release_version_id, | |
2880 | const char *required_host_os_release_sysext_level) { | |
2881 | ||
4beda316 LB |
2882 | _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL; |
2883 | _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL; | |
2884 | _cleanup_(dissected_image_unrefp) DissectedImage *dissected_image = NULL; | |
2885 | _cleanup_(verity_settings_done) VeritySettings verity = VERITY_SETTINGS_DEFAULT; | |
2886 | DissectImageFlags dissect_image_flags; | |
2887 | int r; | |
2888 | ||
2889 | assert(src); | |
2890 | assert(dest); | |
2891 | ||
2892 | r = verity_settings_load(&verity, src, NULL, NULL); | |
2893 | if (r < 0) | |
2894 | return log_debug_errno(r, "Failed to load root hash: %m"); | |
2895 | ||
2896 | dissect_image_flags = verity.data_path ? DISSECT_IMAGE_NO_PARTITION_TABLE : 0; | |
2897 | ||
2898 | r = loop_device_make_by_path( | |
2899 | src, | |
2900 | -1, | |
2901 | verity.data_path ? 0 : LO_FLAGS_PARTSCAN, | |
2902 | &loop_device); | |
2903 | if (r < 0) | |
2904 | return log_debug_errno(r, "Failed to create loop device for image: %m"); | |
2905 | ||
2906 | r = dissect_image( | |
2907 | loop_device->fd, | |
2908 | &verity, | |
2909 | options, | |
75dc190d | 2910 | loop_device->uevent_seqnum_not_before, |
4a62257d | 2911 | loop_device->timestamp_not_before, |
4beda316 LB |
2912 | dissect_image_flags, |
2913 | &dissected_image); | |
2914 | /* No partition table? Might be a single-filesystem image, try again */ | |
2915 | if (!verity.data_path && r == -ENOPKG) | |
2916 | r = dissect_image( | |
2917 | loop_device->fd, | |
2918 | &verity, | |
2919 | options, | |
75dc190d | 2920 | loop_device->uevent_seqnum_not_before, |
4a62257d | 2921 | loop_device->timestamp_not_before, |
75dc190d | 2922 | dissect_image_flags | DISSECT_IMAGE_NO_PARTITION_TABLE, |
4beda316 LB |
2923 | &dissected_image); |
2924 | if (r < 0) | |
2925 | return log_debug_errno(r, "Failed to dissect image: %m"); | |
2926 | ||
2927 | r = dissected_image_decrypt( | |
2928 | dissected_image, | |
2929 | NULL, | |
2930 | &verity, | |
2931 | dissect_image_flags, | |
2932 | &decrypted_image); | |
2933 | if (r < 0) | |
2934 | return log_debug_errno(r, "Failed to decrypt dissected image: %m"); | |
2935 | ||
2936 | r = mkdir_p_label(dest, 0755); | |
2937 | if (r < 0) | |
2938 | return log_debug_errno(r, "Failed to create destination directory %s: %m", dest); | |
2939 | r = umount_recursive(dest, 0); | |
2940 | if (r < 0) | |
2941 | return log_debug_errno(r, "Failed to umount under destination directory %s: %m", dest); | |
2942 | ||
21b61b1d | 2943 | r = dissected_image_mount(dissected_image, dest, UID_INVALID, UID_INVALID, dissect_image_flags); |
4beda316 LB |
2944 | if (r < 0) |
2945 | return log_debug_errno(r, "Failed to mount image: %m"); | |
2946 | ||
93f59701 LB |
2947 | /* If we got os-release values from the caller, then we need to match them with the image's |
2948 | * extension-release.d/ content. Return -EINVAL if there's any mismatch. | |
2949 | * First, check the distro ID. If that matches, then check the new SYSEXT_LEVEL value if | |
2950 | * available, or else fallback to VERSION_ID. */ | |
2951 | if (required_host_os_release_id && | |
2952 | (required_host_os_release_version_id || required_host_os_release_sysext_level)) { | |
2953 | _cleanup_strv_free_ char **extension_release = NULL; | |
2954 | ||
2955 | r = load_extension_release_pairs(dest, dissected_image->image_name, &extension_release); | |
2956 | if (r < 0) | |
2957 | return log_debug_errno(r, "Failed to parse image %s extension-release metadata: %m", dissected_image->image_name); | |
2958 | ||
2959 | r = extension_release_validate( | |
2960 | dissected_image->image_name, | |
2961 | required_host_os_release_id, | |
2962 | required_host_os_release_version_id, | |
2963 | required_host_os_release_sysext_level, | |
2964 | extension_release); | |
2965 | if (r == 0) | |
2966 | return log_debug_errno(SYNTHETIC_ERRNO(ESTALE), "Image %s extension-release metadata does not match the root's", dissected_image->image_name); | |
2967 | if (r < 0) | |
2968 | return log_debug_errno(r, "Failed to compare image %s extension-release metadata with the root's os-release: %m", dissected_image->image_name); | |
2969 | } | |
2970 | ||
4beda316 LB |
2971 | if (decrypted_image) { |
2972 | r = decrypted_image_relinquish(decrypted_image); | |
2973 | if (r < 0) | |
2974 | return log_debug_errno(r, "Failed to relinquish decrypted image: %m"); | |
2975 | } | |
2976 | ||
2977 | loop_device_relinquish(loop_device); | |
2978 | ||
2979 | return 0; | |
2980 | } | |
2981 | ||
569a0e42 | 2982 | DEFINE_STRING_TABLE_LOOKUP(partition_designator, PartitionDesignator); |