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home: add new systemd-homed service that can manage LUKS homes
[thirdparty/systemd.git] / src / home / homed-home.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2
3 #if HAVE_LINUX_MEMFD_H
4 #include <linux/memfd.h>
5 #endif
6
7 #include <sys/mman.h>
8 #include <sys/quota.h>
9 #include <sys/vfs.h>
10
11 #include "blockdev-util.h"
12 #include "btrfs-util.h"
13 #include "bus-common-errors.h"
14 #include "env-util.h"
15 #include "errno-list.h"
16 #include "errno-util.h"
17 #include "fd-util.h"
18 #include "fileio.h"
19 #include "home-util.h"
20 #include "homed-home-bus.h"
21 #include "homed-home.h"
22 #include "missing_syscall.h"
23 #include "mkdir.h"
24 #include "path-util.h"
25 #include "process-util.h"
26 #include "pwquality-util.h"
27 #include "quota-util.h"
28 #include "resize-fs.h"
29 #include "set.h"
30 #include "signal-util.h"
31 #include "stat-util.h"
32 #include "string-table.h"
33 #include "strv.h"
34 #include "user-record-sign.h"
35 #include "user-record-util.h"
36 #include "user-record.h"
37 #include "user-util.h"
38
39 #define HOME_USERS_MAX 500
40 #define PENDING_OPERATIONS_MAX 100
41
42 assert_cc(HOME_UID_MIN <= HOME_UID_MAX);
43 assert_cc(HOME_USERS_MAX <= (HOME_UID_MAX - HOME_UID_MIN + 1));
44
45 static int home_start_work(Home *h, const char *verb, UserRecord *hr, UserRecord *secret);
46
47 DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(operation_hash_ops, void, trivial_hash_func, trivial_compare_func, Operation, operation_unref);
48
49 static int suitable_home_record(UserRecord *hr) {
50 int r;
51
52 assert(hr);
53
54 if (!hr->user_name)
55 return -EUNATCH;
56
57 /* We are a bit more restrictive with what we accept as homed-managed user than what we accept in
58 * home records in general. Let's enforce the stricter rule here. */
59 if (!suitable_user_name(hr->user_name))
60 return -EINVAL;
61 if (!uid_is_valid(hr->uid))
62 return -EINVAL;
63
64 /* Insist we are outside of the dynamic and system range */
65 if (uid_is_system(hr->uid) || gid_is_system(user_record_gid(hr)) ||
66 uid_is_dynamic(hr->uid) || gid_is_dynamic(user_record_gid(hr)))
67 return -EADDRNOTAVAIL;
68
69 /* Insist that GID and UID match */
70 if (user_record_gid(hr) != (gid_t) hr->uid)
71 return -EBADSLT;
72
73 /* Similar for the realm */
74 if (hr->realm) {
75 r = suitable_realm(hr->realm);
76 if (r < 0)
77 return r;
78 if (r == 0)
79 return -EINVAL;
80 }
81
82 return 0;
83 }
84
85 int home_new(Manager *m, UserRecord *hr, const char *sysfs, Home **ret) {
86 _cleanup_(home_freep) Home *home = NULL;
87 _cleanup_free_ char *nm = NULL, *ns = NULL;
88 int r;
89
90 assert(m);
91 assert(hr);
92
93 r = suitable_home_record(hr);
94 if (r < 0)
95 return r;
96
97 if (hashmap_contains(m->homes_by_name, hr->user_name))
98 return -EBUSY;
99
100 if (hashmap_contains(m->homes_by_uid, UID_TO_PTR(hr->uid)))
101 return -EBUSY;
102
103 if (sysfs && hashmap_contains(m->homes_by_sysfs, sysfs))
104 return -EBUSY;
105
106 if (hashmap_size(m->homes_by_name) >= HOME_USERS_MAX)
107 return -EUSERS;
108
109 nm = strdup(hr->user_name);
110 if (!nm)
111 return -ENOMEM;
112
113 if (sysfs) {
114 ns = strdup(sysfs);
115 if (!ns)
116 return -ENOMEM;
117 }
118
119 home = new(Home, 1);
120 if (!home)
121 return -ENOMEM;
122
123 *home = (Home) {
124 .manager = m,
125 .user_name = TAKE_PTR(nm),
126 .uid = hr->uid,
127 .state = _HOME_STATE_INVALID,
128 .worker_stdout_fd = -1,
129 .sysfs = TAKE_PTR(ns),
130 .signed_locally = -1,
131 };
132
133 r = hashmap_put(m->homes_by_name, home->user_name, home);
134 if (r < 0)
135 return r;
136
137 r = hashmap_put(m->homes_by_uid, UID_TO_PTR(home->uid), home);
138 if (r < 0)
139 return r;
140
141 if (home->sysfs) {
142 r = hashmap_put(m->homes_by_sysfs, home->sysfs, home);
143 if (r < 0)
144 return r;
145 }
146
147 r = user_record_clone(hr, USER_RECORD_LOAD_MASK_SECRET, &home->record);
148 if (r < 0)
149 return r;
150
151 (void) bus_manager_emit_auto_login_changed(m);
152 (void) bus_home_emit_change(home);
153
154 if (ret)
155 *ret = TAKE_PTR(home);
156 else
157 TAKE_PTR(home);
158
159 return 0;
160 }
161
162 Home *home_free(Home *h) {
163
164 if (!h)
165 return NULL;
166
167 if (h->manager) {
168 (void) bus_home_emit_remove(h);
169 (void) bus_manager_emit_auto_login_changed(h->manager);
170
171 if (h->user_name)
172 (void) hashmap_remove_value(h->manager->homes_by_name, h->user_name, h);
173
174 if (uid_is_valid(h->uid))
175 (void) hashmap_remove_value(h->manager->homes_by_uid, UID_TO_PTR(h->uid), h);
176
177 if (h->sysfs)
178 (void) hashmap_remove_value(h->manager->homes_by_sysfs, h->sysfs, h);
179
180 if (h->worker_pid > 0)
181 (void) hashmap_remove_value(h->manager->homes_by_worker_pid, PID_TO_PTR(h->worker_pid), h);
182
183 if (h->manager->gc_focus == h)
184 h->manager->gc_focus = NULL;
185 }
186
187 user_record_unref(h->record);
188 user_record_unref(h->secret);
189
190 h->worker_event_source = sd_event_source_unref(h->worker_event_source);
191 safe_close(h->worker_stdout_fd);
192 free(h->user_name);
193 free(h->sysfs);
194
195 h->ref_event_source_please_suspend = sd_event_source_unref(h->ref_event_source_please_suspend);
196 h->ref_event_source_dont_suspend = sd_event_source_unref(h->ref_event_source_dont_suspend);
197
198 h->pending_operations = ordered_set_free(h->pending_operations);
199 h->pending_event_source = sd_event_source_unref(h->pending_event_source);
200 h->deferred_change_event_source = sd_event_source_unref(h->deferred_change_event_source);
201
202 h->current_operation = operation_unref(h->current_operation);
203
204 return mfree(h);
205 }
206
207 int home_set_record(Home *h, UserRecord *hr) {
208 _cleanup_(user_record_unrefp) UserRecord *new_hr = NULL;
209 Home *other;
210 int r;
211
212 assert(h);
213 assert(h->user_name);
214 assert(h->record);
215 assert(hr);
216
217 if (user_record_equal(h->record, hr))
218 return 0;
219
220 r = suitable_home_record(hr);
221 if (r < 0)
222 return r;
223
224 if (!user_record_compatible(h->record, hr))
225 return -EREMCHG;
226
227 if (!FLAGS_SET(hr->mask, USER_RECORD_REGULAR) ||
228 FLAGS_SET(hr->mask, USER_RECORD_SECRET))
229 return -EINVAL;
230
231 if (FLAGS_SET(h->record->mask, USER_RECORD_STATUS)) {
232 _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
233
234 /* Hmm, the existing record has status fields? If so, copy them over */
235
236 v = json_variant_ref(hr->json);
237 r = json_variant_set_field(&v, "status", json_variant_by_key(h->record->json, "status"));
238 if (r < 0)
239 return r;
240
241 new_hr = user_record_new();
242 if (!new_hr)
243 return -ENOMEM;
244
245 r = user_record_load(new_hr, v, USER_RECORD_LOAD_REFUSE_SECRET);
246 if (r < 0)
247 return r;
248
249 hr = new_hr;
250 }
251
252 other = hashmap_get(h->manager->homes_by_uid, UID_TO_PTR(hr->uid));
253 if (other && other != h)
254 return -EBUSY;
255
256 if (h->uid != hr->uid) {
257 r = hashmap_remove_and_replace(h->manager->homes_by_uid, UID_TO_PTR(h->uid), UID_TO_PTR(hr->uid), h);
258 if (r < 0)
259 return r;
260 }
261
262 user_record_unref(h->record);
263 h->record = user_record_ref(hr);
264 h->uid = h->record->uid;
265
266 /* The updated record might have a different autologin setting, trigger a PropertiesChanged event for it */
267 (void) bus_manager_emit_auto_login_changed(h->manager);
268 (void) bus_home_emit_change(h);
269
270 return 0;
271 }
272
273 int home_save_record(Home *h) {
274 _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
275 _cleanup_free_ char *text = NULL;
276 const char *fn;
277 int r;
278
279 assert(h);
280
281 v = json_variant_ref(h->record->json);
282 r = json_variant_normalize(&v);
283 if (r < 0)
284 log_warning_errno(r, "User record could not be normalized.");
285
286 r = json_variant_format(v, JSON_FORMAT_PRETTY|JSON_FORMAT_NEWLINE, &text);
287 if (r < 0)
288 return r;
289
290 (void) mkdir("/var/lib/systemd/", 0755);
291 (void) mkdir("/var/lib/systemd/home/", 0700);
292
293 fn = strjoina("/var/lib/systemd/home/", h->user_name, ".identity");
294
295 r = write_string_file(fn, text, WRITE_STRING_FILE_ATOMIC|WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_MODE_0600);
296 if (r < 0)
297 return r;
298
299 return 0;
300 }
301
302 int home_unlink_record(Home *h) {
303 const char *fn;
304
305 assert(h);
306
307 fn = strjoina("/var/lib/systemd/home/", h->user_name, ".identity");
308 if (unlink(fn) < 0 && errno != ENOENT)
309 return -errno;
310
311 fn = strjoina("/run/systemd/home/", h->user_name, ".ref");
312 if (unlink(fn) < 0 && errno != ENOENT)
313 return -errno;
314
315 return 0;
316 }
317
318 static void home_set_state(Home *h, HomeState state) {
319 HomeState old_state, new_state;
320
321 assert(h);
322
323 old_state = home_get_state(h);
324 h->state = state;
325 new_state = home_get_state(h); /* Query the new state, since the 'state' variable might be set to -1,
326 * in which case we synthesize an high-level state on demand */
327
328 log_info("%s: changing state %s → %s", h->user_name,
329 home_state_to_string(old_state),
330 home_state_to_string(new_state));
331
332 if (HOME_STATE_IS_EXECUTING_OPERATION(old_state) && !HOME_STATE_IS_EXECUTING_OPERATION(new_state)) {
333 /* If we just finished executing some operation, process the queue of pending operations. And
334 * enqueue it for GC too. */
335
336 home_schedule_operation(h, NULL, NULL);
337 manager_enqueue_gc(h->manager, h);
338 }
339 }
340
341 static int home_parse_worker_stdout(int _fd, UserRecord **ret) {
342 _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
343 _cleanup_close_ int fd = _fd; /* take possession, even on failure */
344 _cleanup_(user_record_unrefp) UserRecord *hr = NULL;
345 _cleanup_fclose_ FILE *f = NULL;
346 unsigned line, column;
347 struct stat st;
348 int r;
349
350 if (fstat(fd, &st) < 0)
351 return log_error_errno(errno, "Failed to stat stdout fd: %m");
352
353 assert(S_ISREG(st.st_mode));
354
355 if (st.st_size == 0) { /* empty record */
356 *ret = NULL;
357 return 0;
358 }
359
360 if (lseek(fd, SEEK_SET, 0) == (off_t) -1)
361 return log_error_errno(errno, "Failed to seek to beginning of memfd: %m");
362
363 f = fdopen(fd, "r");
364 if (!f)
365 return log_error_errno(errno, "Failed to reopen memfd: %m");
366
367 TAKE_FD(fd);
368
369 if (DEBUG_LOGGING) {
370 _cleanup_free_ char *text = NULL;
371
372 r = read_full_stream(f, &text, NULL);
373 if (r < 0)
374 return log_error_errno(r, "Failed to read from client: %m");
375
376 log_debug("Got from worker: %s", text);
377 rewind(f);
378 }
379
380 r = json_parse_file(f, "stdout", JSON_PARSE_SENSITIVE, &v, &line, &column);
381 if (r < 0)
382 return log_error_errno(r, "Failed to parse identity at %u:%u: %m", line, column);
383
384 hr = user_record_new();
385 if (!hr)
386 return log_oom();
387
388 r = user_record_load(hr, v, USER_RECORD_LOAD_REFUSE_SECRET);
389 if (r < 0)
390 return log_error_errno(r, "Failed to load home record identity: %m");
391
392 *ret = TAKE_PTR(hr);
393 return 1;
394 }
395
396 static int home_verify_user_record(Home *h, UserRecord *hr, bool *ret_signed_locally, sd_bus_error *ret_error) {
397 int is_signed;
398
399 assert(h);
400 assert(hr);
401 assert(ret_signed_locally);
402
403 is_signed = manager_verify_user_record(h->manager, hr);
404 switch (is_signed) {
405
406 case USER_RECORD_SIGNED_EXCLUSIVE:
407 log_info("Home %s is signed exclusively by our key, accepting.", hr->user_name);
408 *ret_signed_locally = true;
409 return 0;
410
411 case USER_RECORD_SIGNED:
412 log_info("Home %s is signed by our key (and others), accepting.", hr->user_name);
413 *ret_signed_locally = false;
414 return 0;
415
416 case USER_RECORD_FOREIGN:
417 log_info("Home %s is signed by foreign key we like, accepting.", hr->user_name);
418 *ret_signed_locally = false;
419 return 0;
420
421 case USER_RECORD_UNSIGNED:
422 sd_bus_error_setf(ret_error, BUS_ERROR_BAD_SIGNATURE, "User record %s is not signed at all, refusing.", hr->user_name);
423 return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Home %s contains user record that is not signed at all, refusing.", hr->user_name);
424
425 case -ENOKEY:
426 sd_bus_error_setf(ret_error, BUS_ERROR_BAD_SIGNATURE, "User record %s is not signed by any known key, refusing.", hr->user_name);
427 return log_error_errno(is_signed, "Home %s contians user record that is not signed by any known key, refusing.", hr->user_name);
428
429 default:
430 assert(is_signed < 0);
431 return log_error_errno(is_signed, "Failed to verify signature on user record for %s, refusing fixation: %m", hr->user_name);
432 }
433 }
434
435 static int convert_worker_errno(Home *h, int e, sd_bus_error *error) {
436 /* Converts the error numbers the worker process returned into somewhat sensible dbus errors */
437
438 switch (e) {
439
440 case -EMSGSIZE:
441 return sd_bus_error_setf(error, BUS_ERROR_BAD_HOME_SIZE, "File systems of this type cannot shrinked");
442 case -ETXTBSY:
443 return sd_bus_error_setf(error, BUS_ERROR_BAD_HOME_SIZE, "File systems of this type can only be shrinked offline");
444 case -ERANGE:
445 return sd_bus_error_setf(error, BUS_ERROR_BAD_HOME_SIZE, "File system size too small");
446 case -ENOLINK:
447 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "System does not support selected storage backend");
448 case -EPROTONOSUPPORT:
449 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "System does not support selected file system");
450 case -ENOTTY:
451 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Operation not supported on storage backend");
452 case -ESOCKTNOSUPPORT:
453 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Operation not supported on file system");
454 case -ENOKEY:
455 return sd_bus_error_setf(error, BUS_ERROR_BAD_PASSWORD, "Password for home %s is incorrect or not sufficient for authentication.", h->user_name);
456 case -EBADSLT:
457 return sd_bus_error_setf(error, BUS_ERROR_BAD_PASSWORD_AND_NO_TOKEN, "Password for home %s is incorrect or not sufficient, and configured security token not found either.", h->user_name);
458 case -ENOANO:
459 return sd_bus_error_setf(error, BUS_ERROR_TOKEN_PIN_NEEDED, "PIN for security token required.");
460 case -ERFKILL:
461 return sd_bus_error_setf(error, BUS_ERROR_TOKEN_PROTECTED_AUTHENTICATION_PATH_NEEDED, "Security token requires protected authentication path.");
462 case -EOWNERDEAD:
463 return sd_bus_error_setf(error, BUS_ERROR_TOKEN_PIN_LOCKED, "PIN of security token locked.");
464 case -ENOLCK:
465 return sd_bus_error_setf(error, BUS_ERROR_TOKEN_BAD_PIN, "Bad PIN of security token.");
466 case -ETOOMANYREFS:
467 return sd_bus_error_setf(error, BUS_ERROR_TOKEN_BAD_PIN_FEW_TRIES_LEFT, "Bad PIN of security token, and only a few tries left.");
468 case -EUCLEAN:
469 return sd_bus_error_setf(error, BUS_ERROR_TOKEN_BAD_PIN_ONE_TRY_LEFT, "Bad PIN of security token, and only one try left.");
470 case -EBUSY:
471 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "Home %s is currently being used, or an operation on home %s is currently being executed.", h->user_name, h->user_name);
472 case -ENOEXEC:
473 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_ACTIVE, "Home %s is currently not active", h->user_name);
474 case -ENOSPC:
475 return sd_bus_error_setf(error, BUS_ERROR_NO_DISK_SPACE, "Not enough disk space for home %s", h->user_name);
476 }
477
478 return 0;
479 }
480
481 static void home_count_bad_authentication(Home *h, bool save) {
482 int r;
483
484 assert(h);
485
486 r = user_record_bad_authentication(h->record);
487 if (r < 0) {
488 log_warning_errno(r, "Failed to increase bad authentication counter, ignoring: %m");
489 return;
490 }
491
492 if (save) {
493 r = home_save_record(h);
494 if (r < 0)
495 log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
496 }
497 }
498
499 static void home_fixate_finish(Home *h, int ret, UserRecord *hr) {
500 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
501 _cleanup_(user_record_unrefp) UserRecord *secret = NULL;
502 bool signed_locally;
503 int r;
504
505 assert(h);
506 assert(IN_SET(h->state, HOME_FIXATING, HOME_FIXATING_FOR_ACTIVATION, HOME_FIXATING_FOR_ACQUIRE));
507
508 secret = TAKE_PTR(h->secret); /* Take possession */
509
510 if (ret < 0) {
511 if (ret == -ENOKEY)
512 (void) home_count_bad_authentication(h, false);
513
514 (void) convert_worker_errno(h, ret, &error);
515 r = log_error_errno(ret, "Fixation failed: %m");
516 goto fail;
517 }
518 if (!hr) {
519 r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Did not receive user record from worker process, fixation failed.");
520 goto fail;
521 }
522
523 r = home_verify_user_record(h, hr, &signed_locally, &error);
524 if (r < 0)
525 goto fail;
526
527 r = home_set_record(h, hr);
528 if (r < 0) {
529 log_error_errno(r, "Failed to update home record: %m");
530 goto fail;
531 }
532
533 h->signed_locally = signed_locally;
534
535 /* When we finished fixating (and don't follow-up with activation), let's count this as good authentication */
536 if (h->state == HOME_FIXATING) {
537 r = user_record_good_authentication(h->record);
538 if (r < 0)
539 log_warning_errno(r, "Failed to increase good authentication counter, ignoring: %m");
540 }
541
542 r = home_save_record(h);
543 if (r < 0)
544 log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
545
546 if (IN_SET(h->state, HOME_FIXATING_FOR_ACTIVATION, HOME_FIXATING_FOR_ACQUIRE)) {
547
548 r = home_start_work(h, "activate", h->record, secret);
549 if (r < 0) {
550 h->current_operation = operation_result_unref(h->current_operation, r, NULL);
551 home_set_state(h, _HOME_STATE_INVALID);
552 } else
553 home_set_state(h, h->state == HOME_FIXATING_FOR_ACTIVATION ? HOME_ACTIVATING : HOME_ACTIVATING_FOR_ACQUIRE);
554
555 return;
556 }
557
558 log_debug("Fixation of %s completed.", h->user_name);
559
560 h->current_operation = operation_result_unref(h->current_operation, 0, NULL);
561
562 /* Reset the state to "invalid", which makes home_get_state() test if the image exists and returns
563 * HOME_ABSENT vs. HOME_INACTIVE as necessary. */
564 home_set_state(h, _HOME_STATE_INVALID);
565 return;
566
567 fail:
568 /* If fixation fails, we stay in unfixated state! */
569 h->current_operation = operation_result_unref(h->current_operation, r, &error);
570 home_set_state(h, HOME_UNFIXATED);
571 }
572
573 static void home_activate_finish(Home *h, int ret, UserRecord *hr) {
574 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
575 int r;
576
577 assert(h);
578 assert(IN_SET(h->state, HOME_ACTIVATING, HOME_ACTIVATING_FOR_ACQUIRE));
579
580 if (ret < 0) {
581 if (ret == -ENOKEY)
582 home_count_bad_authentication(h, true);
583
584 (void) convert_worker_errno(h, ret, &error);
585 r = log_error_errno(ret, "Activation failed: %m");
586 goto finish;
587 }
588
589 if (hr) {
590 bool signed_locally;
591
592 r = home_verify_user_record(h, hr, &signed_locally, &error);
593 if (r < 0)
594 goto finish;
595
596 r = home_set_record(h, hr);
597 if (r < 0) {
598 log_error_errno(r, "Failed to update home record, ignoring: %m");
599 goto finish;
600 }
601
602 h->signed_locally = signed_locally;
603
604 r = user_record_good_authentication(h->record);
605 if (r < 0)
606 log_warning_errno(r, "Failed to increase good authentication counter, ignoring: %m");
607
608 r = home_save_record(h);
609 if (r < 0)
610 log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
611 }
612
613 log_debug("Activation of %s completed.", h->user_name);
614 r = 0;
615
616 finish:
617 h->current_operation = operation_result_unref(h->current_operation, r, &error);
618 home_set_state(h, _HOME_STATE_INVALID);
619 }
620
621 static void home_deactivate_finish(Home *h, int ret, UserRecord *hr) {
622 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
623 int r;
624
625 assert(h);
626 assert(h->state == HOME_DEACTIVATING);
627 assert(!hr); /* We don't expect a record on this operation */
628
629 if (ret < 0) {
630 (void) convert_worker_errno(h, ret, &error);
631 r = log_error_errno(ret, "Deactivation of %s failed: %m", h->user_name);
632 goto finish;
633 }
634
635 log_debug("Deactivation of %s completed.", h->user_name);
636 r = 0;
637
638 finish:
639 h->current_operation = operation_result_unref(h->current_operation, r, &error);
640 home_set_state(h, _HOME_STATE_INVALID);
641 }
642
643 static void home_remove_finish(Home *h, int ret, UserRecord *hr) {
644 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
645 Manager *m;
646 int r;
647
648 assert(h);
649 assert(h->state == HOME_REMOVING);
650 assert(!hr); /* We don't expect a record on this operation */
651
652 m = h->manager;
653
654 if (ret < 0 && ret != -EALREADY) {
655 (void) convert_worker_errno(h, ret, &error);
656 r = log_error_errno(ret, "Removing %s failed: %m", h->user_name);
657 goto fail;
658 }
659
660 /* For a couple of storage types we can't delete the actual data storage when called (such as LUKS on
661 * partitions like USB sticks, or so). Sometimes these storage locations are among those we normally
662 * automatically discover in /home or in udev. When such a home is deleted let's hence issue a rescan
663 * after completion, so that "unfixated" entries are rediscovered. */
664 if (!IN_SET(user_record_test_image_path(h->record), USER_TEST_UNDEFINED, USER_TEST_ABSENT))
665 manager_enqueue_rescan(m);
666
667 /* The image is now removed from disk. Now also remove our stored record */
668 r = home_unlink_record(h);
669 if (r < 0) {
670 log_error_errno(r, "Removing record file failed: %m");
671 goto fail;
672 }
673
674 log_debug("Removal of %s completed.", h->user_name);
675 h->current_operation = operation_result_unref(h->current_operation, 0, NULL);
676
677 /* Unload this record from memory too now. */
678 h = home_free(h);
679 return;
680
681 fail:
682 h->current_operation = operation_result_unref(h->current_operation, r, &error);
683 home_set_state(h, _HOME_STATE_INVALID);
684 }
685
686 static void home_create_finish(Home *h, int ret, UserRecord *hr) {
687 int r;
688
689 assert(h);
690 assert(h->state == HOME_CREATING);
691
692 if (ret < 0) {
693 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
694
695 (void) convert_worker_errno(h, ret, &error);
696 log_error_errno(ret, "Operation on %s failed: %m", h->user_name);
697 h->current_operation = operation_result_unref(h->current_operation, ret, &error);
698
699 if (h->unregister_on_failure) {
700 (void) home_unlink_record(h);
701 h = home_free(h);
702 return;
703 }
704
705 home_set_state(h, _HOME_STATE_INVALID);
706 return;
707 }
708
709 if (hr) {
710 r = home_set_record(h, hr);
711 if (r < 0)
712 log_warning_errno(r, "Failed to update home record, ignoring: %m");
713 }
714
715 r = home_save_record(h);
716 if (r < 0)
717 log_warning_errno(r, "Failed to save record to disk, ignoring: %m");
718
719 log_debug("Creation of %s completed.", h->user_name);
720
721 h->current_operation = operation_result_unref(h->current_operation, 0, NULL);
722 home_set_state(h, _HOME_STATE_INVALID);
723 }
724
725 static void home_change_finish(Home *h, int ret, UserRecord *hr) {
726 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
727 int r;
728
729 assert(h);
730
731 if (ret < 0) {
732 if (ret == -ENOKEY)
733 (void) home_count_bad_authentication(h, true);
734
735 (void) convert_worker_errno(h, ret, &error);
736 r = log_error_errno(ret, "Change operation failed: %m");
737 goto finish;
738 }
739
740 if (hr) {
741 r = home_set_record(h, hr);
742 if (r < 0)
743 log_warning_errno(r, "Failed to update home record, ignoring: %m");
744 else {
745 r = user_record_good_authentication(h->record);
746 if (r < 0)
747 log_warning_errno(r, "Failed to increase good authentication counter, ignoring: %m");
748
749 r = home_save_record(h);
750 if (r < 0)
751 log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
752 }
753 }
754
755 log_debug("Change operation of %s completed.", h->user_name);
756 r = 0;
757
758 finish:
759 h->current_operation = operation_result_unref(h->current_operation, r, &error);
760 home_set_state(h, _HOME_STATE_INVALID);
761 }
762
763 static void home_locking_finish(Home *h, int ret, UserRecord *hr) {
764 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
765 int r;
766
767 assert(h);
768 assert(h->state == HOME_LOCKING);
769
770 if (ret < 0) {
771 (void) convert_worker_errno(h, ret, &error);
772 r = log_error_errno(ret, "Locking operation failed: %m");
773 goto finish;
774 }
775
776 log_debug("Locking operation of %s completed.", h->user_name);
777 h->current_operation = operation_result_unref(h->current_operation, 0, NULL);
778 home_set_state(h, HOME_LOCKED);
779 return;
780
781 finish:
782 /* If a specific home doesn't know the concept of locking, then that's totally OK, don't propagate
783 * the error if we are executing a LockAllHomes() operation. */
784
785 if (h->current_operation->type == OPERATION_LOCK_ALL && r == -ENOTTY)
786 h->current_operation = operation_result_unref(h->current_operation, 0, NULL);
787 else
788 h->current_operation = operation_result_unref(h->current_operation, r, &error);
789
790 home_set_state(h, _HOME_STATE_INVALID);
791 }
792
793 static void home_unlocking_finish(Home *h, int ret, UserRecord *hr) {
794 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
795 int r;
796
797 assert(h);
798 assert(IN_SET(h->state, HOME_UNLOCKING, HOME_UNLOCKING_FOR_ACQUIRE));
799
800 if (ret < 0) {
801 if (ret == -ENOKEY)
802 (void) home_count_bad_authentication(h, true);
803
804 (void) convert_worker_errno(h, ret, &error);
805 r = log_error_errno(ret, "Unlocking operation failed: %m");
806
807 /* Revert to locked state */
808 home_set_state(h, HOME_LOCKED);
809 h->current_operation = operation_result_unref(h->current_operation, r, &error);
810 return;
811 }
812
813 r = user_record_good_authentication(h->record);
814 if (r < 0)
815 log_warning_errno(r, "Failed to increase good authentication counter, ignoring: %m");
816 else {
817 r = home_save_record(h);
818 if (r < 0)
819 log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
820 }
821
822 log_debug("Unlocking operation of %s completed.", h->user_name);
823
824 h->current_operation = operation_result_unref(h->current_operation, r, &error);
825 home_set_state(h, _HOME_STATE_INVALID);
826 return;
827 }
828
829 static void home_authenticating_finish(Home *h, int ret, UserRecord *hr) {
830 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
831 int r;
832
833 assert(h);
834 assert(IN_SET(h->state, HOME_AUTHENTICATING, HOME_AUTHENTICATING_WHILE_ACTIVE, HOME_AUTHENTICATING_FOR_ACQUIRE));
835
836 if (ret < 0) {
837 if (ret == -ENOKEY)
838 (void) home_count_bad_authentication(h, true);
839
840 (void) convert_worker_errno(h, ret, &error);
841 r = log_error_errno(ret, "Authentication failed: %m");
842 goto finish;
843 }
844
845 if (hr) {
846 r = home_set_record(h, hr);
847 if (r < 0)
848 log_warning_errno(r, "Failed to update home record, ignoring: %m");
849 else {
850 r = user_record_good_authentication(h->record);
851 if (r < 0)
852 log_warning_errno(r, "Failed to increase good authentication counter, ignoring: %m");
853
854 r = home_save_record(h);
855 if (r < 0)
856 log_warning_errno(r, "Failed to write home record to disk, ignoring: %m");
857 }
858 }
859
860 log_debug("Authentication of %s completed.", h->user_name);
861 r = 0;
862
863 finish:
864 h->current_operation = operation_result_unref(h->current_operation, r, &error);
865 home_set_state(h, _HOME_STATE_INVALID);
866 }
867
868 static int home_on_worker_process(sd_event_source *s, const siginfo_t *si, void *userdata) {
869 _cleanup_(user_record_unrefp) UserRecord *hr = NULL;
870 Home *h = userdata;
871 int ret;
872
873 assert(s);
874 assert(si);
875 assert(h);
876
877 assert(h->worker_pid == si->si_pid);
878 assert(h->worker_event_source);
879 assert(h->worker_stdout_fd >= 0);
880
881 (void) hashmap_remove_value(h->manager->homes_by_worker_pid, PID_TO_PTR(h->worker_pid), h);
882
883 h->worker_pid = 0;
884 h->worker_event_source = sd_event_source_unref(h->worker_event_source);
885
886 if (si->si_code != CLD_EXITED) {
887 assert(IN_SET(si->si_code, CLD_KILLED, CLD_DUMPED));
888 ret = log_debug_errno(SYNTHETIC_ERRNO(EPROTO), "Worker process died abnormally with signal %s.", signal_to_string(si->si_status));
889 } else if (si->si_status != EXIT_SUCCESS) {
890 /* If we received an error code via sd_notify(), use it */
891 if (h->worker_error_code != 0)
892 ret = log_debug_errno(h->worker_error_code, "Worker reported error code %s.", errno_to_name(h->worker_error_code));
893 else
894 ret = log_debug_errno(SYNTHETIC_ERRNO(EPROTO), "Worker exited with exit code %i.", si->si_status);
895 } else
896 ret = home_parse_worker_stdout(TAKE_FD(h->worker_stdout_fd), &hr);
897
898 h->worker_stdout_fd = safe_close(h->worker_stdout_fd);
899
900 switch (h->state) {
901
902 case HOME_FIXATING:
903 case HOME_FIXATING_FOR_ACTIVATION:
904 case HOME_FIXATING_FOR_ACQUIRE:
905 home_fixate_finish(h, ret, hr);
906 break;
907
908 case HOME_ACTIVATING:
909 case HOME_ACTIVATING_FOR_ACQUIRE:
910 home_activate_finish(h, ret, hr);
911 break;
912
913 case HOME_DEACTIVATING:
914 home_deactivate_finish(h, ret, hr);
915 break;
916
917 case HOME_LOCKING:
918 home_locking_finish(h, ret, hr);
919 break;
920
921 case HOME_UNLOCKING:
922 case HOME_UNLOCKING_FOR_ACQUIRE:
923 home_unlocking_finish(h, ret, hr);
924 break;
925
926 case HOME_CREATING:
927 home_create_finish(h, ret, hr);
928 break;
929
930 case HOME_REMOVING:
931 home_remove_finish(h, ret, hr);
932 break;
933
934 case HOME_UPDATING:
935 case HOME_UPDATING_WHILE_ACTIVE:
936 case HOME_RESIZING:
937 case HOME_RESIZING_WHILE_ACTIVE:
938 case HOME_PASSWD:
939 case HOME_PASSWD_WHILE_ACTIVE:
940 home_change_finish(h, ret, hr);
941 break;
942
943 case HOME_AUTHENTICATING:
944 case HOME_AUTHENTICATING_WHILE_ACTIVE:
945 case HOME_AUTHENTICATING_FOR_ACQUIRE:
946 home_authenticating_finish(h, ret, hr);
947 break;
948
949 default:
950 assert_not_reached("Unexpected state after worker exited");
951 }
952
953 return 0;
954 }
955
956 static int home_start_work(Home *h, const char *verb, UserRecord *hr, UserRecord *secret) {
957 _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
958 _cleanup_(erase_and_freep) char *formatted = NULL;
959 _cleanup_close_ int stdin_fd = -1, stdout_fd = -1;
960 pid_t pid = 0;
961 int r;
962
963 assert(h);
964 assert(verb);
965 assert(hr);
966
967 if (h->worker_pid != 0)
968 return -EBUSY;
969
970 assert(h->worker_stdout_fd < 0);
971 assert(!h->worker_event_source);
972
973 v = json_variant_ref(hr->json);
974
975 if (secret) {
976 JsonVariant *sub = NULL;
977
978 sub = json_variant_by_key(secret->json, "secret");
979 if (!sub)
980 return -ENOKEY;
981
982 r = json_variant_set_field(&v, "secret", sub);
983 if (r < 0)
984 return r;
985 }
986
987 r = json_variant_format(v, 0, &formatted);
988 if (r < 0)
989 return r;
990
991 stdin_fd = acquire_data_fd(formatted, strlen(formatted), 0);
992 if (stdin_fd < 0)
993 return stdin_fd;
994
995 log_debug("Sending to worker: %s", formatted);
996
997 stdout_fd = memfd_create("homework-stdout", MFD_CLOEXEC);
998 if (stdout_fd < 0)
999 return -errno;
1000
1001 r = safe_fork_full("(sd-homework)",
1002 (int[]) { stdin_fd, stdout_fd }, 2,
1003 FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_LOG, &pid);
1004 if (r < 0)
1005 return r;
1006 if (r == 0) {
1007 /* Child */
1008
1009 if (setenv("NOTIFY_SOCKET", "/run/systemd/home/notify", 1) < 0) {
1010 log_error_errno(errno, "Failed to set $NOTIFY_SOCKET: %m");
1011 _exit(EXIT_FAILURE);
1012 }
1013
1014 r = rearrange_stdio(stdin_fd, stdout_fd, STDERR_FILENO);
1015 if (r < 0) {
1016 log_error_errno(r, "Failed to rearrange stdin/stdout/stderr: %m");
1017 _exit(EXIT_FAILURE);
1018 }
1019
1020 stdin_fd = stdout_fd = -1; /* have been invalidated by rearrange_stdio() */
1021
1022 execl(SYSTEMD_HOMEWORK_PATH, SYSTEMD_HOMEWORK_PATH, verb, NULL);
1023 log_error_errno(errno, "Failed to invoke " SYSTEMD_HOMEWORK_PATH ": %m");
1024 _exit(EXIT_FAILURE);
1025 }
1026
1027 r = sd_event_add_child(h->manager->event, &h->worker_event_source, pid, WEXITED, home_on_worker_process, h);
1028 if (r < 0)
1029 return r;
1030
1031 (void) sd_event_source_set_description(h->worker_event_source, "worker");
1032
1033 r = hashmap_put(h->manager->homes_by_worker_pid, PID_TO_PTR(pid), h);
1034 if (r < 0) {
1035 h->worker_event_source = sd_event_source_unref(h->worker_event_source);
1036 return r;
1037 }
1038
1039 h->worker_stdout_fd = TAKE_FD(stdout_fd);
1040 h->worker_pid = pid;
1041 h->worker_error_code = 0;
1042
1043 return 0;
1044 }
1045
1046 static int home_ratelimit(Home *h, sd_bus_error *error) {
1047 int r, ret;
1048
1049 assert(h);
1050
1051 ret = user_record_ratelimit(h->record);
1052 if (ret < 0)
1053 return ret;
1054
1055 if (h->state != HOME_UNFIXATED) {
1056 r = home_save_record(h);
1057 if (r < 0)
1058 log_warning_errno(r, "Failed to save updated record, ignoring: %m");
1059 }
1060
1061 if (ret == 0) {
1062 char buf[FORMAT_TIMESPAN_MAX];
1063 usec_t t, n;
1064
1065 n = now(CLOCK_REALTIME);
1066 t = user_record_ratelimit_next_try(h->record);
1067
1068 if (t != USEC_INFINITY && t > n)
1069 return sd_bus_error_setf(error, BUS_ERROR_AUTHENTICATION_LIMIT_HIT, "Too many login attempts, please try again in %s!",
1070 format_timespan(buf, sizeof(buf), t - n, USEC_PER_SEC));
1071
1072 return sd_bus_error_setf(error, BUS_ERROR_AUTHENTICATION_LIMIT_HIT, "Too many login attempts, please try again later.");
1073 }
1074
1075 return 0;
1076 }
1077
1078 static int home_fixate_internal(
1079 Home *h,
1080 UserRecord *secret,
1081 HomeState for_state,
1082 sd_bus_error *error) {
1083
1084 int r;
1085
1086 assert(h);
1087 assert(IN_SET(for_state, HOME_FIXATING, HOME_FIXATING_FOR_ACTIVATION, HOME_FIXATING_FOR_ACQUIRE));
1088
1089 r = home_start_work(h, "inspect", h->record, secret);
1090 if (r < 0)
1091 return r;
1092
1093 if (for_state == HOME_FIXATING_FOR_ACTIVATION) {
1094 /* Remember the secret data, since we need it for the activation again, later on. */
1095 user_record_unref(h->secret);
1096 h->secret = user_record_ref(secret);
1097 }
1098
1099 home_set_state(h, for_state);
1100 return 0;
1101 }
1102
1103 int home_fixate(Home *h, UserRecord *secret, sd_bus_error *error) {
1104 int r;
1105
1106 assert(h);
1107
1108 switch (home_get_state(h)) {
1109 case HOME_ABSENT:
1110 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1111 case HOME_INACTIVE:
1112 case HOME_ACTIVE:
1113 case HOME_LOCKED:
1114 return sd_bus_error_setf(error, BUS_ERROR_HOME_ALREADY_FIXATED, "Home %s is already fixated.", h->user_name);
1115 case HOME_UNFIXATED:
1116 break;
1117 default:
1118 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1119 }
1120
1121 r = home_ratelimit(h, error);
1122 if (r < 0)
1123 return r;
1124
1125 return home_fixate_internal(h, secret, HOME_FIXATING, error);
1126 }
1127
1128 static int home_activate_internal(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) {
1129 int r;
1130
1131 assert(h);
1132 assert(IN_SET(for_state, HOME_ACTIVATING, HOME_ACTIVATING_FOR_ACQUIRE));
1133
1134 r = home_start_work(h, "activate", h->record, secret);
1135 if (r < 0)
1136 return r;
1137
1138 home_set_state(h, for_state);
1139 return 0;
1140 }
1141
1142 int home_activate(Home *h, UserRecord *secret, sd_bus_error *error) {
1143 int r;
1144
1145 assert(h);
1146
1147 switch (home_get_state(h)) {
1148 case HOME_UNFIXATED:
1149 return home_fixate_internal(h, secret, HOME_FIXATING_FOR_ACTIVATION, error);
1150 case HOME_ABSENT:
1151 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1152 case HOME_ACTIVE:
1153 return sd_bus_error_setf(error, BUS_ERROR_HOME_ALREADY_ACTIVE, "Home %s is already active.", h->user_name);
1154 case HOME_LOCKED:
1155 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1156 case HOME_INACTIVE:
1157 break;
1158 default:
1159 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1160 }
1161
1162 r = home_ratelimit(h, error);
1163 if (r < 0)
1164 return r;
1165
1166 return home_activate_internal(h, secret, HOME_ACTIVATING, error);
1167 }
1168
1169 static int home_authenticate_internal(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) {
1170 int r;
1171
1172 assert(h);
1173 assert(IN_SET(for_state, HOME_AUTHENTICATING, HOME_AUTHENTICATING_WHILE_ACTIVE, HOME_AUTHENTICATING_FOR_ACQUIRE));
1174
1175 r = home_start_work(h, "inspect", h->record, secret);
1176 if (r < 0)
1177 return r;
1178
1179 home_set_state(h, for_state);
1180 return 0;
1181 }
1182
1183 int home_authenticate(Home *h, UserRecord *secret, sd_bus_error *error) {
1184 HomeState state;
1185 int r;
1186
1187 assert(h);
1188
1189 state = home_get_state(h);
1190 switch (state) {
1191 case HOME_ABSENT:
1192 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1193 case HOME_LOCKED:
1194 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1195 case HOME_UNFIXATED:
1196 case HOME_INACTIVE:
1197 case HOME_ACTIVE:
1198 break;
1199 default:
1200 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1201 }
1202
1203 r = home_ratelimit(h, error);
1204 if (r < 0)
1205 return r;
1206
1207 return home_authenticate_internal(h, secret, state == HOME_ACTIVE ? HOME_AUTHENTICATING_WHILE_ACTIVE : HOME_AUTHENTICATING, error);
1208 }
1209
1210 static int home_deactivate_internal(Home *h, bool force, sd_bus_error *error) {
1211 int r;
1212
1213 assert(h);
1214
1215 r = home_start_work(h, force ? "deactivate-force" : "deactivate", h->record, NULL);
1216 if (r < 0)
1217 return r;
1218
1219 home_set_state(h, HOME_DEACTIVATING);
1220 return 0;
1221 }
1222
1223 int home_deactivate(Home *h, bool force, sd_bus_error *error) {
1224 assert(h);
1225
1226 switch (home_get_state(h)) {
1227 case HOME_UNFIXATED:
1228 case HOME_ABSENT:
1229 case HOME_INACTIVE:
1230 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_ACTIVE, "Home %s not active.", h->user_name);
1231 case HOME_LOCKED:
1232 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1233 case HOME_ACTIVE:
1234 break;
1235 default:
1236 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1237 }
1238
1239 return home_deactivate_internal(h, force, error);
1240 }
1241
1242 int home_create(Home *h, UserRecord *secret, sd_bus_error *error) {
1243 int r;
1244
1245 assert(h);
1246
1247 switch (home_get_state(h)) {
1248 case HOME_INACTIVE:
1249 if (h->record->storage < 0)
1250 break; /* if no storage is defined we don't know what precisely to look for, hence
1251 * HOME_INACTIVE is OK in that case too. */
1252
1253 if (IN_SET(user_record_test_image_path(h->record), USER_TEST_MAYBE, USER_TEST_UNDEFINED))
1254 break; /* And if the image path test isn't conclusive, let's also go on */
1255
1256 _fallthrough_;
1257 case HOME_UNFIXATED:
1258 return sd_bus_error_setf(error, BUS_ERROR_HOME_EXISTS, "Home of user %s already exists.", h->user_name);
1259 case HOME_ABSENT:
1260 break;
1261 case HOME_ACTIVE:
1262 case HOME_LOCKED:
1263 default:
1264 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "Home %s is currently being used, or an operation on home %s is currently being executed.", h->user_name, h->user_name);
1265 }
1266
1267 if (h->record->enforce_password_policy == false)
1268 log_debug("Password quality check turned off for account, skipping.");
1269 else {
1270 r = quality_check_password(h->record, secret, error);
1271 if (r < 0)
1272 return r;
1273 }
1274
1275 r = home_start_work(h, "create", h->record, secret);
1276 if (r < 0)
1277 return r;
1278
1279 home_set_state(h, HOME_CREATING);
1280 return 0;
1281 }
1282
1283 int home_remove(Home *h, sd_bus_error *error) {
1284 HomeState state;
1285 int r;
1286
1287 assert(h);
1288
1289 state = home_get_state(h);
1290 switch (state) {
1291 case HOME_ABSENT: /* If the home directory is absent, then this is just like unregistering */
1292 return home_unregister(h, error);
1293 case HOME_LOCKED:
1294 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1295 case HOME_UNFIXATED:
1296 case HOME_INACTIVE:
1297 break;
1298 case HOME_ACTIVE:
1299 default:
1300 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "Home %s is currently being used, or an operation on home %s is currently being executed.", h->user_name, h->user_name);
1301 }
1302
1303 r = home_start_work(h, "remove", h->record, NULL);
1304 if (r < 0)
1305 return r;
1306
1307 home_set_state(h, HOME_REMOVING);
1308 return 0;
1309 }
1310
1311 static int user_record_extend_with_binding(UserRecord *hr, UserRecord *with_binding, UserRecordLoadFlags flags, UserRecord **ret) {
1312 _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
1313 _cleanup_(user_record_unrefp) UserRecord *nr = NULL;
1314 JsonVariant *binding;
1315 int r;
1316
1317 assert(hr);
1318 assert(with_binding);
1319 assert(ret);
1320
1321 assert_se(v = json_variant_ref(hr->json));
1322
1323 binding = json_variant_by_key(with_binding->json, "binding");
1324 if (binding) {
1325 r = json_variant_set_field(&v, "binding", binding);
1326 if (r < 0)
1327 return r;
1328 }
1329
1330 nr = user_record_new();
1331 if (!nr)
1332 return -ENOMEM;
1333
1334 r = user_record_load(nr, v, flags);
1335 if (r < 0)
1336 return r;
1337
1338 *ret = TAKE_PTR(nr);
1339 return 0;
1340 }
1341
1342 static int home_update_internal(Home *h, const char *verb, UserRecord *hr, UserRecord *secret, sd_bus_error *error) {
1343 _cleanup_(user_record_unrefp) UserRecord *new_hr = NULL, *saved_secret = NULL, *signed_hr = NULL;
1344 int r, c;
1345
1346 assert(h);
1347 assert(verb);
1348 assert(hr);
1349
1350 if (!user_record_compatible(hr, h->record))
1351 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_MISMATCH, "Updated user record is not compatible with existing one.");
1352 c = user_record_compare_last_change(hr, h->record); /* refuse downgrades */
1353 if (c < 0)
1354 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_DOWNGRADE, "Refusing to update to older home record.");
1355
1356 if (!secret && FLAGS_SET(hr->mask, USER_RECORD_SECRET)) {
1357 r = user_record_clone(hr, USER_RECORD_EXTRACT_SECRET, &saved_secret);
1358 if (r < 0)
1359 return r;
1360
1361 secret = saved_secret;
1362 }
1363
1364 r = manager_verify_user_record(h->manager, hr);
1365 switch (r) {
1366
1367 case USER_RECORD_UNSIGNED:
1368 if (h->signed_locally <= 0) /* If the existing record is not owned by us, don't accept an
1369 * unsigned new record. i.e. only implicitly sign new records
1370 * that where previously signed by us too. */
1371 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_SIGNED, "Home %s is signed and cannot be modified locally.", h->user_name);
1372
1373 /* The updated record is not signed, then do so now */
1374 r = manager_sign_user_record(h->manager, hr, &signed_hr, error);
1375 if (r < 0)
1376 return r;
1377
1378 hr = signed_hr;
1379 break;
1380
1381 case USER_RECORD_SIGNED_EXCLUSIVE:
1382 case USER_RECORD_SIGNED:
1383 case USER_RECORD_FOREIGN:
1384 /* Has already been signed. Great! */
1385 break;
1386
1387 case -ENOKEY:
1388 default:
1389 return r;
1390 }
1391
1392 r = user_record_extend_with_binding(hr, h->record, USER_RECORD_LOAD_MASK_SECRET, &new_hr);
1393 if (r < 0)
1394 return r;
1395
1396 if (c == 0) {
1397 /* different payload but same lastChangeUSec field? That's not cool! */
1398
1399 r = user_record_masked_equal(new_hr, h->record, USER_RECORD_REGULAR|USER_RECORD_PRIVILEGED|USER_RECORD_PER_MACHINE);
1400 if (r < 0)
1401 return r;
1402 if (r == 0)
1403 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_MISMATCH, "Home record different but timestamp remained the same, refusing.");
1404 }
1405
1406 r = home_start_work(h, verb, new_hr, secret);
1407 if (r < 0)
1408 return r;
1409
1410 return 0;
1411 }
1412
1413 int home_update(Home *h, UserRecord *hr, sd_bus_error *error) {
1414 HomeState state;
1415 int r;
1416
1417 assert(h);
1418 assert(hr);
1419
1420 state = home_get_state(h);
1421 switch (state) {
1422 case HOME_UNFIXATED:
1423 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s has not been fixated yet.", h->user_name);
1424 case HOME_ABSENT:
1425 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1426 case HOME_LOCKED:
1427 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1428 case HOME_INACTIVE:
1429 case HOME_ACTIVE:
1430 break;
1431 default:
1432 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1433 }
1434
1435 r = home_ratelimit(h, error);
1436 if (r < 0)
1437 return r;
1438
1439 r = home_update_internal(h, "update", hr, NULL, error);
1440 if (r < 0)
1441 return r;
1442
1443 home_set_state(h, state == HOME_ACTIVE ? HOME_UPDATING_WHILE_ACTIVE : HOME_UPDATING);
1444 return 0;
1445 }
1446
1447 int home_resize(Home *h, uint64_t disk_size, UserRecord *secret, sd_bus_error *error) {
1448 _cleanup_(user_record_unrefp) UserRecord *c = NULL;
1449 HomeState state;
1450 int r;
1451
1452 assert(h);
1453
1454 state = home_get_state(h);
1455 switch (state) {
1456 case HOME_UNFIXATED:
1457 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s has not been fixated yet.", h->user_name);
1458 case HOME_ABSENT:
1459 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1460 case HOME_LOCKED:
1461 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1462 case HOME_INACTIVE:
1463 case HOME_ACTIVE:
1464 break;
1465 default:
1466 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1467 }
1468
1469 r = home_ratelimit(h, error);
1470 if (r < 0)
1471 return r;
1472
1473 if (disk_size == UINT64_MAX || disk_size == h->record->disk_size) {
1474 if (h->record->disk_size == UINT64_MAX)
1475 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Not disk size to resize to specified.");
1476
1477 c = user_record_ref(h->record); /* Shortcut if size is unspecified or matches the record */
1478 } else {
1479 _cleanup_(user_record_unrefp) UserRecord *signed_c = NULL;
1480
1481 if (h->signed_locally <= 0) /* Don't allow changing of records not signed only by us */
1482 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_SIGNED, "Home %s is signed and cannot be modified locally.", h->user_name);
1483
1484 r = user_record_clone(h->record, USER_RECORD_LOAD_REFUSE_SECRET, &c);
1485 if (r < 0)
1486 return r;
1487
1488 r = user_record_set_disk_size(c, disk_size);
1489 if (r == -ERANGE)
1490 return sd_bus_error_setf(error, BUS_ERROR_BAD_HOME_SIZE, "Requested size for home %s out of acceptable range.", h->user_name);
1491 if (r < 0)
1492 return r;
1493
1494 r = user_record_update_last_changed(c, false);
1495 if (r == -ECHRNG)
1496 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_MISMATCH, "Record last change time of %s is newer than current time, cannot update.", h->user_name);
1497 if (r < 0)
1498 return r;
1499
1500 r = manager_sign_user_record(h->manager, c, &signed_c, error);
1501 if (r < 0)
1502 return r;
1503
1504 user_record_unref(c);
1505 c = TAKE_PTR(signed_c);
1506 }
1507
1508 r = home_update_internal(h, "resize", c, secret, error);
1509 if (r < 0)
1510 return r;
1511
1512 home_set_state(h, state == HOME_ACTIVE ? HOME_RESIZING_WHILE_ACTIVE : HOME_RESIZING);
1513 return 0;
1514 }
1515
1516 static int home_may_change_password(
1517 Home *h,
1518 sd_bus_error *error) {
1519
1520 int r;
1521
1522 assert(h);
1523
1524 r = user_record_test_password_change_required(h->record);
1525 if (IN_SET(r, -EKEYREVOKED, -EOWNERDEAD, -EKEYEXPIRED))
1526 return 0; /* expired in some form, but chaning is allowed */
1527 if (IN_SET(r, -EKEYREJECTED, -EROFS))
1528 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Expiration settings of account %s do not allow changing of password.", h->user_name);
1529 if (r < 0)
1530 return log_error_errno(r, "Failed to test password expiry: %m");
1531
1532 return 0; /* not expired */
1533 }
1534
1535 int home_passwd(Home *h,
1536 UserRecord *new_secret,
1537 UserRecord *old_secret,
1538 sd_bus_error *error) {
1539
1540 _cleanup_(user_record_unrefp) UserRecord *c = NULL, *merged_secret = NULL, *signed_c = NULL;
1541 HomeState state;
1542 int r;
1543
1544 assert(h);
1545
1546 if (h->signed_locally <= 0) /* Don't allow changing of records not signed only by us */
1547 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_SIGNED, "Home %s is signed and cannot be modified locally.", h->user_name);
1548
1549 state = home_get_state(h);
1550 switch (state) {
1551 case HOME_UNFIXATED:
1552 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s has not been fixated yet.", h->user_name);
1553 case HOME_ABSENT:
1554 return sd_bus_error_setf(error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
1555 case HOME_LOCKED:
1556 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1557 case HOME_INACTIVE:
1558 case HOME_ACTIVE:
1559 break;
1560 default:
1561 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1562 }
1563
1564 r = home_ratelimit(h, error);
1565 if (r < 0)
1566 return r;
1567
1568 r = home_may_change_password(h, error);
1569 if (r < 0)
1570 return r;
1571
1572 r = user_record_clone(h->record, USER_RECORD_LOAD_REFUSE_SECRET, &c);
1573 if (r < 0)
1574 return r;
1575
1576 merged_secret = user_record_new();
1577 if (!merged_secret)
1578 return -ENOMEM;
1579
1580 r = user_record_merge_secret(merged_secret, old_secret);
1581 if (r < 0)
1582 return r;
1583
1584 r = user_record_merge_secret(merged_secret, new_secret);
1585 if (r < 0)
1586 return r;
1587
1588 if (!strv_isempty(new_secret->password)) {
1589 /* Update the password only if one is specified, otherwise let's just reuse the old password
1590 * data. This is useful as a way to propagate updated user records into the LUKS backends
1591 * properly. */
1592
1593 r = user_record_make_hashed_password(c, new_secret->password, /* extend = */ false);
1594 if (r < 0)
1595 return r;
1596
1597 r = user_record_set_password_change_now(c, -1 /* remove */);
1598 if (r < 0)
1599 return r;
1600 }
1601
1602 r = user_record_update_last_changed(c, true);
1603 if (r == -ECHRNG)
1604 return sd_bus_error_setf(error, BUS_ERROR_HOME_RECORD_MISMATCH, "Record last change time of %s is newer than current time, cannot update.", h->user_name);
1605 if (r < 0)
1606 return r;
1607
1608 r = manager_sign_user_record(h->manager, c, &signed_c, error);
1609 if (r < 0)
1610 return r;
1611
1612 if (c->enforce_password_policy == false)
1613 log_debug("Password quality check turned off for account, skipping.");
1614 else {
1615 r = quality_check_password(c, merged_secret, error);
1616 if (r < 0)
1617 return r;
1618 }
1619
1620 r = home_update_internal(h, "passwd", signed_c, merged_secret, error);
1621 if (r < 0)
1622 return r;
1623
1624 home_set_state(h, state == HOME_ACTIVE ? HOME_PASSWD_WHILE_ACTIVE : HOME_PASSWD);
1625 return 0;
1626 }
1627
1628 int home_unregister(Home *h, sd_bus_error *error) {
1629 int r;
1630
1631 assert(h);
1632
1633 switch (home_get_state(h)) {
1634 case HOME_UNFIXATED:
1635 return sd_bus_error_setf(error, BUS_ERROR_HOME_UNFIXATED, "Home %s is not registered.", h->user_name);
1636 case HOME_LOCKED:
1637 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
1638 case HOME_ABSENT:
1639 case HOME_INACTIVE:
1640 break;
1641 case HOME_ACTIVE:
1642 default:
1643 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "Home %s is currently being used, or an operation on home %s is currently being executed.", h->user_name, h->user_name);
1644 }
1645
1646 r = home_unlink_record(h);
1647 if (r < 0)
1648 return r;
1649
1650 /* And destroy the whole entry. The caller needs to be prepared for that. */
1651 h = home_free(h);
1652 return 1;
1653 }
1654
1655 int home_lock(Home *h, sd_bus_error *error) {
1656 int r;
1657
1658 assert(h);
1659
1660 switch (home_get_state(h)) {
1661 case HOME_UNFIXATED:
1662 case HOME_ABSENT:
1663 case HOME_INACTIVE:
1664 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_ACTIVE, "Home %s is not active.", h->user_name);
1665 case HOME_LOCKED:
1666 return sd_bus_error_setf(error, BUS_ERROR_HOME_LOCKED, "Home %s is already locked.", h->user_name);
1667 case HOME_ACTIVE:
1668 break;
1669 default:
1670 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1671 }
1672
1673 r = home_start_work(h, "lock", h->record, NULL);
1674 if (r < 0)
1675 return r;
1676
1677 home_set_state(h, HOME_LOCKING);
1678 return 0;
1679 }
1680
1681 static int home_unlock_internal(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) {
1682 int r;
1683
1684 assert(h);
1685 assert(IN_SET(for_state, HOME_UNLOCKING, HOME_UNLOCKING_FOR_ACQUIRE));
1686
1687 r = home_start_work(h, "unlock", h->record, secret);
1688 if (r < 0)
1689 return r;
1690
1691 home_set_state(h, for_state);
1692 return 0;
1693 }
1694
1695 int home_unlock(Home *h, UserRecord *secret, sd_bus_error *error) {
1696 int r;
1697 assert(h);
1698
1699 r = home_ratelimit(h, error);
1700 if (r < 0)
1701 return r;
1702
1703 switch (home_get_state(h)) {
1704 case HOME_UNFIXATED:
1705 case HOME_ABSENT:
1706 case HOME_INACTIVE:
1707 case HOME_ACTIVE:
1708 return sd_bus_error_setf(error, BUS_ERROR_HOME_NOT_LOCKED, "Home %s is not locked.", h->user_name);
1709 case HOME_LOCKED:
1710 break;
1711 default:
1712 return sd_bus_error_setf(error, BUS_ERROR_HOME_BUSY, "An operation on home %s is currently being executed.", h->user_name);
1713 }
1714
1715 return home_unlock_internal(h, secret, HOME_UNLOCKING, error);
1716 }
1717
1718 HomeState home_get_state(Home *h) {
1719 assert(h);
1720
1721 /* When the state field is initialized, it counts. */
1722 if (h->state >= 0)
1723 return h->state;
1724
1725 /* Otherwise, let's see if the home directory is mounted. If so, we assume for sure the home
1726 * directory is active */
1727 if (user_record_test_home_directory(h->record) == USER_TEST_MOUNTED)
1728 return HOME_ACTIVE;
1729
1730 /* And if we see the image being gone, we report this as absent */
1731 if (user_record_test_image_path(h->record) == USER_TEST_ABSENT)
1732 return HOME_ABSENT;
1733
1734 /* And for all other cases we return "inactive". */
1735 return HOME_INACTIVE;
1736 }
1737
1738 void home_process_notify(Home *h, char **l) {
1739 const char *e;
1740 int error;
1741 int r;
1742
1743 assert(h);
1744
1745 e = strv_env_get(l, "ERRNO");
1746 if (!e) {
1747 log_debug("Got notify message lacking ERRNO= field, ignoring.");
1748 return;
1749 }
1750
1751 r = safe_atoi(e, &error);
1752 if (r < 0) {
1753 log_debug_errno(r, "Failed to parse receieved error number, ignoring: %s", e);
1754 return;
1755 }
1756 if (error <= 0) {
1757 log_debug("Error number is out of range: %i", error);
1758 return;
1759 }
1760
1761 h->worker_error_code = error;
1762 }
1763
1764 int home_killall(Home *h) {
1765 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1766 _cleanup_free_ char *unit = NULL;
1767 int r;
1768
1769 assert(h);
1770
1771 if (!uid_is_valid(h->uid))
1772 return 0;
1773
1774 assert(h->uid > 0); /* We never should be UID 0 */
1775
1776 /* Let's kill everything matching the specified UID */
1777 r = safe_fork("(sd-killer)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_WAIT|FORK_LOG, NULL);
1778 if (r < 0)
1779 return r;
1780 if (r == 0) {
1781 gid_t gid;
1782
1783 /* Child */
1784
1785 gid = user_record_gid(h->record);
1786 if (setresgid(gid, gid, gid) < 0) {
1787 log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid);
1788 _exit(EXIT_FAILURE);
1789 }
1790
1791 if (setgroups(0, NULL) < 0) {
1792 log_error_errno(errno, "Failed to reset auxiliary groups list: %m");
1793 _exit(EXIT_FAILURE);
1794 }
1795
1796 if (setresuid(h->uid, h->uid, h->uid) < 0) {
1797 log_error_errno(errno, "Failed to change UID to " UID_FMT ": %m", h->uid);
1798 _exit(EXIT_FAILURE);
1799 }
1800
1801 if (kill(-1, SIGKILL) < 0) {
1802 log_error_errno(errno, "Failed to kill all processes of UID " UID_FMT ": %m", h->uid);
1803 _exit(EXIT_FAILURE);
1804 }
1805
1806 _exit(EXIT_SUCCESS);
1807 }
1808
1809 /* Let's also kill everything in the user's slice */
1810 if (asprintf(&unit, "user-" UID_FMT ".slice", h->uid) < 0)
1811 return log_oom();
1812
1813 r = sd_bus_call_method(
1814 h->manager->bus,
1815 "org.freedesktop.systemd1",
1816 "/org/freedesktop/systemd1",
1817 "org.freedesktop.systemd1.Manager",
1818 "KillUnit",
1819 &error,
1820 NULL,
1821 "ssi", unit, "all", SIGKILL);
1822 if (r < 0)
1823 log_full_errno(sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ? LOG_DEBUG : LOG_WARNING,
1824 r, "Failed to kill login processes of user, ignoring: %s", bus_error_message(&error, r));
1825
1826 return 1;
1827 }
1828
1829 static int home_get_disk_status_luks(
1830 Home *h,
1831 HomeState state,
1832 uint64_t *ret_disk_size,
1833 uint64_t *ret_disk_usage,
1834 uint64_t *ret_disk_free,
1835 uint64_t *ret_disk_ceiling,
1836 uint64_t *ret_disk_floor) {
1837
1838 uint64_t disk_size = UINT64_MAX, disk_usage = UINT64_MAX, disk_free = UINT64_MAX,
1839 disk_ceiling = UINT64_MAX, disk_floor = UINT64_MAX,
1840 stat_used = UINT64_MAX, fs_size = UINT64_MAX, header_size = 0;
1841
1842 struct statfs sfs;
1843 const char *hd;
1844 int r;
1845
1846 assert(h);
1847 assert(ret_disk_size);
1848 assert(ret_disk_usage);
1849 assert(ret_disk_free);
1850 assert(ret_disk_ceiling);
1851
1852 if (state != HOME_ABSENT) {
1853 const char *ip;
1854
1855 ip = user_record_image_path(h->record);
1856 if (ip) {
1857 struct stat st;
1858
1859 if (stat(ip, &st) < 0)
1860 log_debug_errno(errno, "Failed to stat() %s, ignoring: %m", ip);
1861 else if (S_ISREG(st.st_mode)) {
1862 _cleanup_free_ char *parent = NULL;
1863
1864 disk_size = st.st_size;
1865 stat_used = st.st_blocks * 512;
1866
1867 parent = dirname_malloc(ip);
1868 if (!parent)
1869 return log_oom();
1870
1871 if (statfs(parent, &sfs) < 0)
1872 log_debug_errno(errno, "Failed to statfs() %s, ignoring: %m", parent);
1873 else
1874 disk_ceiling = stat_used + sfs.f_bsize * sfs.f_bavail;
1875
1876 } else if (S_ISBLK(st.st_mode)) {
1877 _cleanup_free_ char *szbuf = NULL;
1878 char p[SYS_BLOCK_PATH_MAX("/size")];
1879
1880 /* Let's read the size off sysfs, so that we don't have to open the device */
1881 xsprintf_sys_block_path(p, "/size", st.st_rdev);
1882 r = read_one_line_file(p, &szbuf);
1883 if (r < 0)
1884 log_debug_errno(r, "Failed to read %s, ignoring: %m", p);
1885 else {
1886 uint64_t sz;
1887
1888 r = safe_atou64(szbuf, &sz);
1889 if (r < 0)
1890 log_debug_errno(r, "Failed to parse %s, ignoring: %s", p, szbuf);
1891 else
1892 disk_size = sz * 512;
1893 }
1894 } else
1895 log_debug("Image path is not a block device or regular file, not able to acquire size.");
1896 }
1897 }
1898
1899 if (!HOME_STATE_IS_ACTIVE(state))
1900 goto finish;
1901
1902 hd = user_record_home_directory(h->record);
1903 if (!hd)
1904 goto finish;
1905
1906 if (statfs(hd, &sfs) < 0) {
1907 log_debug_errno(errno, "Failed to statfs() %s, ignoring: %m", hd);
1908 goto finish;
1909 }
1910
1911 disk_free = sfs.f_bsize * sfs.f_bavail;
1912 fs_size = sfs.f_bsize * sfs.f_blocks;
1913 if (disk_size != UINT64_MAX && disk_size > fs_size)
1914 header_size = disk_size - fs_size;
1915
1916 /* We take a perspective from the user here (as opposed to from the host): the used disk space is the
1917 * difference from the limit and what's free. This makes a difference if sparse mode is not used: in
1918 * that case the image is pre-allocated and thus appears all used from the host PoV but is not used
1919 * up at all yet from the user's PoV.
1920 *
1921 * That said, we use use the stat() reported loopback file size as upper boundary: our footprint can
1922 * never be larger than what we take up on the lowest layers. */
1923
1924 if (disk_size != UINT64_MAX && disk_size > disk_free) {
1925 disk_usage = disk_size - disk_free;
1926
1927 if (stat_used != UINT64_MAX && disk_usage > stat_used)
1928 disk_usage = stat_used;
1929 } else
1930 disk_usage = stat_used;
1931
1932 /* If we have the magic, determine floor preferably by magic */
1933 disk_floor = minimal_size_by_fs_magic(sfs.f_type) + header_size;
1934
1935 finish:
1936 /* If we don't know the magic, go by file system name */
1937 if (disk_floor == UINT64_MAX)
1938 disk_floor = minimal_size_by_fs_name(user_record_file_system_type(h->record));
1939
1940 *ret_disk_size = disk_size;
1941 *ret_disk_usage = disk_usage;
1942 *ret_disk_free = disk_free;
1943 *ret_disk_ceiling = disk_ceiling;
1944 *ret_disk_floor = disk_floor;
1945
1946 return 0;
1947 }
1948
1949 static int home_get_disk_status_directory(
1950 Home *h,
1951 HomeState state,
1952 uint64_t *ret_disk_size,
1953 uint64_t *ret_disk_usage,
1954 uint64_t *ret_disk_free,
1955 uint64_t *ret_disk_ceiling,
1956 uint64_t *ret_disk_floor) {
1957
1958 uint64_t disk_size = UINT64_MAX, disk_usage = UINT64_MAX, disk_free = UINT64_MAX,
1959 disk_ceiling = UINT64_MAX, disk_floor = UINT64_MAX;
1960 struct statfs sfs;
1961 struct dqblk req;
1962 const char *path = NULL;
1963 int r;
1964
1965 assert(ret_disk_size);
1966 assert(ret_disk_usage);
1967 assert(ret_disk_free);
1968 assert(ret_disk_ceiling);
1969 assert(ret_disk_floor);
1970
1971 if (HOME_STATE_IS_ACTIVE(state))
1972 path = user_record_home_directory(h->record);
1973
1974 if (!path) {
1975 if (state == HOME_ABSENT)
1976 goto finish;
1977
1978 path = user_record_image_path(h->record);
1979 }
1980
1981 if (!path)
1982 goto finish;
1983
1984 if (statfs(path, &sfs) < 0)
1985 log_debug_errno(errno, "Failed to statfs() %s, ignoring: %m", path);
1986 else {
1987 disk_free = sfs.f_bsize * sfs.f_bavail;
1988 disk_size = sfs.f_bsize * sfs.f_blocks;
1989
1990 /* We don't initialize disk_usage from statfs() data here, since the device is likely not used
1991 * by us alone, and disk_usage should only reflect our own use. */
1992 }
1993
1994 if (IN_SET(h->record->storage, USER_CLASSIC, USER_DIRECTORY, USER_SUBVOLUME)) {
1995
1996 r = btrfs_is_subvol(path);
1997 if (r < 0)
1998 log_debug_errno(r, "Failed to determine whether %s is a btrfs subvolume: %m", path);
1999 else if (r > 0) {
2000 BtrfsQuotaInfo qi;
2001
2002 r = btrfs_subvol_get_subtree_quota(path, 0, &qi);
2003 if (r < 0)
2004 log_debug_errno(r, "Failed to query btrfs subtree quota, ignoring: %m");
2005 else {
2006 disk_usage = qi.referenced;
2007
2008 if (disk_free != UINT64_MAX) {
2009 disk_ceiling = qi.referenced + disk_free;
2010
2011 if (disk_size != UINT64_MAX && disk_ceiling > disk_size)
2012 disk_ceiling = disk_size;
2013 }
2014
2015 if (qi.referenced_max != UINT64_MAX) {
2016 if (disk_size != UINT64_MAX)
2017 disk_size = MIN(qi.referenced_max, disk_size);
2018 else
2019 disk_size = qi.referenced_max;
2020 }
2021
2022 if (disk_size != UINT64_MAX) {
2023 if (disk_size > disk_usage)
2024 disk_free = disk_size - disk_usage;
2025 else
2026 disk_free = 0;
2027 }
2028 }
2029
2030 goto finish;
2031 }
2032 }
2033
2034 if (IN_SET(h->record->storage, USER_CLASSIC, USER_DIRECTORY, USER_FSCRYPT)) {
2035 r = quotactl_path(QCMD_FIXED(Q_GETQUOTA, USRQUOTA), path, h->uid, &req);
2036 if (r < 0) {
2037 if (ERRNO_IS_NOT_SUPPORTED(r)) {
2038 log_debug_errno(r, "No UID quota support on %s.", path);
2039 goto finish;
2040 }
2041
2042 if (r != -ESRCH) {
2043 log_debug_errno(r, "Failed to query disk quota for UID " UID_FMT ": %m", h->uid);
2044 goto finish;
2045 }
2046
2047 disk_usage = 0; /* No record of this user? then nothing was used */
2048 } else {
2049 if (FLAGS_SET(req.dqb_valid, QIF_SPACE) && disk_free != UINT64_MAX) {
2050 disk_ceiling = req.dqb_curspace + disk_free;
2051
2052 if (disk_size != UINT64_MAX && disk_ceiling > disk_size)
2053 disk_ceiling = disk_size;
2054 }
2055
2056 if (FLAGS_SET(req.dqb_valid, QIF_BLIMITS)) {
2057 uint64_t q;
2058
2059 /* Take the minimum of the quota and the available disk space here */
2060 q = req.dqb_bhardlimit * QIF_DQBLKSIZE;
2061 if (disk_size != UINT64_MAX)
2062 disk_size = MIN(disk_size, q);
2063 else
2064 disk_size = q;
2065 }
2066 if (FLAGS_SET(req.dqb_valid, QIF_SPACE)) {
2067 disk_usage = req.dqb_curspace;
2068
2069 if (disk_size != UINT64_MAX) {
2070 if (disk_size > disk_usage)
2071 disk_free = disk_size - disk_usage;
2072 else
2073 disk_free = 0;
2074 }
2075 }
2076 }
2077 }
2078
2079 finish:
2080 *ret_disk_size = disk_size;
2081 *ret_disk_usage = disk_usage;
2082 *ret_disk_free = disk_free;
2083 *ret_disk_ceiling = disk_ceiling;
2084 *ret_disk_floor = disk_floor;
2085
2086 return 0;
2087 }
2088
2089 int home_augment_status(
2090 Home *h,
2091 UserRecordLoadFlags flags,
2092 UserRecord **ret) {
2093
2094 uint64_t disk_size = UINT64_MAX, disk_usage = UINT64_MAX, disk_free = UINT64_MAX, disk_ceiling = UINT64_MAX, disk_floor = UINT64_MAX;
2095 _cleanup_(json_variant_unrefp) JsonVariant *j = NULL, *v = NULL, *m = NULL, *status = NULL;
2096 _cleanup_(user_record_unrefp) UserRecord *ur = NULL;
2097 char ids[SD_ID128_STRING_MAX];
2098 HomeState state;
2099 sd_id128_t id;
2100 int r;
2101
2102 assert(h);
2103 assert(ret);
2104
2105 /* We are supposed to add this, this can't be on hence. */
2106 assert(!FLAGS_SET(flags, USER_RECORD_STRIP_STATUS));
2107
2108 r = sd_id128_get_machine(&id);
2109 if (r < 0)
2110 return r;
2111
2112 state = home_get_state(h);
2113
2114 switch (h->record->storage) {
2115
2116 case USER_LUKS:
2117 r = home_get_disk_status_luks(h, state, &disk_size, &disk_usage, &disk_free, &disk_ceiling, &disk_floor);
2118 if (r < 0)
2119 return r;
2120
2121 break;
2122
2123 case USER_CLASSIC:
2124 case USER_DIRECTORY:
2125 case USER_SUBVOLUME:
2126 case USER_FSCRYPT:
2127 case USER_CIFS:
2128 r = home_get_disk_status_directory(h, state, &disk_size, &disk_usage, &disk_free, &disk_ceiling, &disk_floor);
2129 if (r < 0)
2130 return r;
2131
2132 break;
2133
2134 default:
2135 ; /* unset */
2136 }
2137
2138 if (disk_floor == UINT64_MAX || (disk_usage != UINT64_MAX && disk_floor < disk_usage))
2139 disk_floor = disk_usage;
2140 if (disk_floor == UINT64_MAX || disk_floor < USER_DISK_SIZE_MIN)
2141 disk_floor = USER_DISK_SIZE_MIN;
2142 if (disk_ceiling == UINT64_MAX || disk_ceiling > USER_DISK_SIZE_MAX)
2143 disk_ceiling = USER_DISK_SIZE_MAX;
2144
2145 r = json_build(&status,
2146 JSON_BUILD_OBJECT(
2147 JSON_BUILD_PAIR("state", JSON_BUILD_STRING(home_state_to_string(state))),
2148 JSON_BUILD_PAIR("service", JSON_BUILD_STRING("io.systemd.Home")),
2149 JSON_BUILD_PAIR_CONDITION(disk_size != UINT64_MAX, "diskSize", JSON_BUILD_UNSIGNED(disk_size)),
2150 JSON_BUILD_PAIR_CONDITION(disk_usage != UINT64_MAX, "diskUsage", JSON_BUILD_UNSIGNED(disk_usage)),
2151 JSON_BUILD_PAIR_CONDITION(disk_free != UINT64_MAX, "diskFree", JSON_BUILD_UNSIGNED(disk_free)),
2152 JSON_BUILD_PAIR_CONDITION(disk_ceiling != UINT64_MAX, "diskCeiling", JSON_BUILD_UNSIGNED(disk_ceiling)),
2153 JSON_BUILD_PAIR_CONDITION(disk_floor != UINT64_MAX, "diskFloor", JSON_BUILD_UNSIGNED(disk_floor)),
2154 JSON_BUILD_PAIR_CONDITION(h->signed_locally >= 0, "signedLocally", JSON_BUILD_BOOLEAN(h->signed_locally))
2155 ));
2156 if (r < 0)
2157 return r;
2158
2159 j = json_variant_ref(h->record->json);
2160 v = json_variant_ref(json_variant_by_key(j, "status"));
2161 m = json_variant_ref(json_variant_by_key(v, sd_id128_to_string(id, ids)));
2162
2163 r = json_variant_filter(&m, STRV_MAKE("diskSize", "diskUsage", "diskFree", "diskCeiling", "diskFloor", "signedLocally"));
2164 if (r < 0)
2165 return r;
2166
2167 r = json_variant_merge(&m, status);
2168 if (r < 0)
2169 return r;
2170
2171 r = json_variant_set_field(&v, ids, m);
2172 if (r < 0)
2173 return r;
2174
2175 r = json_variant_set_field(&j, "status", v);
2176 if (r < 0)
2177 return r;
2178
2179 ur = user_record_new();
2180 if (!ur)
2181 return -ENOMEM;
2182
2183 r = user_record_load(ur, j, flags);
2184 if (r < 0)
2185 return r;
2186
2187 ur->incomplete =
2188 FLAGS_SET(h->record->mask, USER_RECORD_PRIVILEGED) &&
2189 !FLAGS_SET(ur->mask, USER_RECORD_PRIVILEGED);
2190
2191 *ret = TAKE_PTR(ur);
2192 return 0;
2193 }
2194
2195 static int on_home_ref_eof(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
2196 _cleanup_(operation_unrefp) Operation *o = NULL;
2197 Home *h = userdata;
2198
2199 assert(s);
2200 assert(h);
2201
2202 if (h->ref_event_source_please_suspend == s)
2203 h->ref_event_source_please_suspend = sd_event_source_disable_unref(h->ref_event_source_please_suspend);
2204
2205 if (h->ref_event_source_dont_suspend == s)
2206 h->ref_event_source_dont_suspend = sd_event_source_disable_unref(h->ref_event_source_dont_suspend);
2207
2208 if (h->ref_event_source_dont_suspend || h->ref_event_source_please_suspend)
2209 return 0;
2210
2211 log_info("Got notification that all sessions of user %s ended, deactivating automatically.", h->user_name);
2212
2213 o = operation_new(OPERATION_PIPE_EOF, NULL);
2214 if (!o) {
2215 log_oom();
2216 return 0;
2217 }
2218
2219 home_schedule_operation(h, o, NULL);
2220 return 0;
2221 }
2222
2223 int home_create_fifo(Home *h, bool please_suspend) {
2224 _cleanup_close_ int ret_fd = -1;
2225 sd_event_source **ss;
2226 const char *fn, *suffix;
2227 int r;
2228
2229 assert(h);
2230
2231 if (please_suspend) {
2232 suffix = ".please-suspend";
2233 ss = &h->ref_event_source_please_suspend;
2234 } else {
2235 suffix = ".dont-suspend";
2236 ss = &h->ref_event_source_dont_suspend;
2237 }
2238
2239 fn = strjoina("/run/systemd/home/", h->user_name, suffix);
2240
2241 if (!*ss) {
2242 _cleanup_close_ int ref_fd = -1;
2243
2244 (void) mkdir("/run/systemd/home/", 0755);
2245 if (mkfifo(fn, 0600) < 0 && errno != EEXIST)
2246 return log_error_errno(errno, "Failed to create FIFO %s: %m", fn);
2247
2248 ref_fd = open(fn, O_RDONLY|O_CLOEXEC|O_NONBLOCK);
2249 if (ref_fd < 0)
2250 return log_error_errno(errno, "Failed to open FIFO %s for reading: %m", fn);
2251
2252 r = sd_event_add_io(h->manager->event, ss, ref_fd, 0, on_home_ref_eof, h);
2253 if (r < 0)
2254 return log_error_errno(r, "Failed to allocate reference FIFO event source: %m");
2255
2256 (void) sd_event_source_set_description(*ss, "acquire-ref");
2257
2258 r = sd_event_source_set_priority(*ss, SD_EVENT_PRIORITY_IDLE-1);
2259 if (r < 0)
2260 return r;
2261
2262 r = sd_event_source_set_io_fd_own(*ss, true);
2263 if (r < 0)
2264 return log_error_errno(r, "Failed to pass ownership of FIFO event fd to event source: %m");
2265
2266 TAKE_FD(ref_fd);
2267 }
2268
2269 ret_fd = open(fn, O_WRONLY|O_CLOEXEC|O_NONBLOCK);
2270 if (ret_fd < 0)
2271 return log_error_errno(errno, "Failed to open FIFO %s for writing: %m", fn);
2272
2273 return TAKE_FD(ret_fd);
2274 }
2275
2276 static int home_dispatch_acquire(Home *h, Operation *o) {
2277 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2278 int (*call)(Home *h, UserRecord *secret, HomeState for_state, sd_bus_error *error) = NULL;
2279 HomeState for_state;
2280 int r;
2281
2282 assert(h);
2283 assert(o);
2284 assert(o->type == OPERATION_ACQUIRE);
2285
2286 switch (home_get_state(h)) {
2287
2288 case HOME_UNFIXATED:
2289 for_state = HOME_FIXATING_FOR_ACQUIRE;
2290 call = home_fixate_internal;
2291 break;
2292
2293 case HOME_ABSENT:
2294 r = sd_bus_error_setf(&error, BUS_ERROR_HOME_ABSENT, "Home %s is currently missing or not plugged in.", h->user_name);
2295 break;
2296
2297 case HOME_INACTIVE:
2298 for_state = HOME_ACTIVATING_FOR_ACQUIRE;
2299 call = home_activate_internal;
2300 break;
2301
2302 case HOME_ACTIVE:
2303 for_state = HOME_AUTHENTICATING_FOR_ACQUIRE;
2304 call = home_authenticate_internal;
2305 break;
2306
2307 case HOME_LOCKED:
2308 for_state = HOME_UNLOCKING_FOR_ACQUIRE;
2309 call = home_unlock_internal;
2310 break;
2311
2312 default:
2313 /* All other cases means we are currently executing an operation, which means the job remains
2314 * pending. */
2315 return 0;
2316 }
2317
2318 assert(!h->current_operation);
2319
2320 if (call) {
2321 r = home_ratelimit(h, &error);
2322 if (r >= 0)
2323 r = call(h, o->secret, for_state, &error);
2324 }
2325
2326 if (r != 0) /* failure or completed */
2327 operation_result(o, r, &error);
2328 else /* ongoing */
2329 h->current_operation = operation_ref(o);
2330
2331 return 1;
2332 }
2333
2334 static int home_dispatch_release(Home *h, Operation *o) {
2335 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2336 int r;
2337
2338 assert(h);
2339 assert(o);
2340 assert(o->type == OPERATION_RELEASE);
2341
2342 if (h->ref_event_source_dont_suspend || h->ref_event_source_please_suspend)
2343 /* If there's now a reference again, then let's abort the release attempt */
2344 r = sd_bus_error_setf(&error, BUS_ERROR_HOME_BUSY, "Home %s is currently referenced.", h->user_name);
2345 else {
2346 switch (home_get_state(h)) {
2347
2348 case HOME_UNFIXATED:
2349 case HOME_ABSENT:
2350 case HOME_INACTIVE:
2351 r = 0; /* done */
2352 break;
2353
2354 case HOME_LOCKED:
2355 r = sd_bus_error_setf(&error, BUS_ERROR_HOME_LOCKED, "Home %s is currently locked.", h->user_name);
2356 break;
2357
2358 case HOME_ACTIVE:
2359 r = home_deactivate_internal(h, false, &error);
2360 break;
2361
2362 default:
2363 /* All other cases means we are currently executing an operation, which means the job remains
2364 * pending. */
2365 return 0;
2366 }
2367 }
2368
2369 assert(!h->current_operation);
2370
2371 if (r <= 0) /* failure or completed */
2372 operation_result(o, r, &error);
2373 else /* ongoing */
2374 h->current_operation = operation_ref(o);
2375
2376 return 1;
2377 }
2378
2379 static int home_dispatch_lock_all(Home *h, Operation *o) {
2380 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2381 int r;
2382
2383 assert(h);
2384 assert(o);
2385 assert(o->type == OPERATION_LOCK_ALL);
2386
2387 switch (home_get_state(h)) {
2388
2389 case HOME_UNFIXATED:
2390 case HOME_ABSENT:
2391 case HOME_INACTIVE:
2392 log_info("Home %s is not active, no locking necessary.", h->user_name);
2393 r = 0; /* done */
2394 break;
2395
2396 case HOME_LOCKED:
2397 log_info("Home %s is already locked.", h->user_name);
2398 r = 0; /* done */
2399 break;
2400
2401 case HOME_ACTIVE:
2402 log_info("Locking home %s.", h->user_name);
2403 r = home_lock(h, &error);
2404 break;
2405
2406 default:
2407 /* All other cases means we are currently executing an operation, which means the job remains
2408 * pending. */
2409 return 0;
2410 }
2411
2412 assert(!h->current_operation);
2413
2414 if (r != 0) /* failure or completed */
2415 operation_result(o, r, &error);
2416 else /* ongoing */
2417 h->current_operation = operation_ref(o);
2418
2419 return 1;
2420 }
2421
2422 static int home_dispatch_pipe_eof(Home *h, Operation *o) {
2423 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2424 int r;
2425
2426 assert(h);
2427 assert(o);
2428 assert(o->type == OPERATION_PIPE_EOF);
2429
2430 if (h->ref_event_source_please_suspend || h->ref_event_source_dont_suspend)
2431 return 1; /* Hmm, there's a reference again, let's cancel this */
2432
2433 switch (home_get_state(h)) {
2434
2435 case HOME_UNFIXATED:
2436 case HOME_ABSENT:
2437 case HOME_INACTIVE:
2438 log_info("Home %s already deactivated, no automatic deactivation needed.", h->user_name);
2439 break;
2440
2441 case HOME_DEACTIVATING:
2442 log_info("Home %s is already being deactivated, automatic deactivated unnecessary.", h->user_name);
2443 break;
2444
2445 case HOME_ACTIVE:
2446 r = home_deactivate_internal(h, false, &error);
2447 if (r < 0)
2448 log_warning_errno(r, "Failed to deactivate %s, ignoring: %s", h->user_name, bus_error_message(&error, r));
2449 break;
2450
2451 case HOME_LOCKED:
2452 default:
2453 /* If the device is locked or any operation is being executed, let's leave this pending */
2454 return 0;
2455 }
2456
2457 /* Note that we don't call operation_fail() or operation_success() here, because this kind of
2458 * operation has no message associated with it, and thus there's no need to propagate success. */
2459
2460 assert(!o->message);
2461 return 1;
2462 }
2463
2464 static int home_dispatch_deactivate_force(Home *h, Operation *o) {
2465 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2466 int r;
2467
2468 assert(h);
2469 assert(o);
2470 assert(o->type == OPERATION_DEACTIVATE_FORCE);
2471
2472 switch (home_get_state(h)) {
2473
2474 case HOME_UNFIXATED:
2475 case HOME_ABSENT:
2476 case HOME_INACTIVE:
2477 log_debug("Home %s already deactivated, no forced deactivation due to unplug needed.", h->user_name);
2478 break;
2479
2480 case HOME_DEACTIVATING:
2481 log_debug("Home %s is already being deactivated, forced deactivation due to unplug unnecessary.", h->user_name);
2482 break;
2483
2484 case HOME_ACTIVE:
2485 case HOME_LOCKED:
2486 r = home_deactivate_internal(h, true, &error);
2487 if (r < 0)
2488 log_warning_errno(r, "Failed to forcibly deactivate %s, ignoring: %s", h->user_name, bus_error_message(&error, r));
2489 break;
2490
2491 default:
2492 /* If any operation is being executed, let's leave this pending */
2493 return 0;
2494 }
2495
2496 /* Note that we don't call operation_fail() or operation_success() here, because this kind of
2497 * operation has no message associated with it, and thus there's no need to propagate success. */
2498
2499 assert(!o->message);
2500 return 1;
2501 }
2502
2503 static int on_pending(sd_event_source *s, void *userdata) {
2504 Home *h = userdata;
2505 Operation *o;
2506 int r;
2507
2508 assert(s);
2509 assert(h);
2510
2511 o = ordered_set_first(h->pending_operations);
2512 if (o) {
2513 static int (* const operation_table[_OPERATION_MAX])(Home *h, Operation *o) = {
2514 [OPERATION_ACQUIRE] = home_dispatch_acquire,
2515 [OPERATION_RELEASE] = home_dispatch_release,
2516 [OPERATION_LOCK_ALL] = home_dispatch_lock_all,
2517 [OPERATION_PIPE_EOF] = home_dispatch_pipe_eof,
2518 [OPERATION_DEACTIVATE_FORCE] = home_dispatch_deactivate_force,
2519 };
2520
2521 assert(operation_table[o->type]);
2522 r = operation_table[o->type](h, o);
2523 if (r != 0) {
2524 /* The operation completed, let's remove it from the pending list, and exit while
2525 * leaving the event source enabled as it is. */
2526 assert_se(ordered_set_remove(h->pending_operations, o) == o);
2527 operation_unref(o);
2528 return 0;
2529 }
2530 }
2531
2532 /* Nothing to do anymore, let's turn off this event source */
2533 r = sd_event_source_set_enabled(s, SD_EVENT_OFF);
2534 if (r < 0)
2535 return log_error_errno(r, "Failed to disable event source: %m");
2536
2537 return 0;
2538 }
2539
2540 int home_schedule_operation(Home *h, Operation *o, sd_bus_error *error) {
2541 int r;
2542
2543 assert(h);
2544
2545 if (o) {
2546 if (ordered_set_size(h->pending_operations) >= PENDING_OPERATIONS_MAX)
2547 return sd_bus_error_setf(error, BUS_ERROR_TOO_MANY_OPERATIONS, "Too many client operations requested");
2548
2549 r = ordered_set_ensure_allocated(&h->pending_operations, &operation_hash_ops);
2550 if (r < 0)
2551 return r;
2552
2553 r = ordered_set_put(h->pending_operations, o);
2554 if (r < 0)
2555 return r;
2556
2557 operation_ref(o);
2558 }
2559
2560 if (!h->pending_event_source) {
2561 r = sd_event_add_defer(h->manager->event, &h->pending_event_source, on_pending, h);
2562 if (r < 0)
2563 return log_error_errno(r, "Failed to allocate pending defer event source: %m");
2564
2565 (void) sd_event_source_set_description(h->pending_event_source, "pending");
2566
2567 r = sd_event_source_set_priority(h->pending_event_source, SD_EVENT_PRIORITY_IDLE);
2568 if (r < 0)
2569 return r;
2570 }
2571
2572 r = sd_event_source_set_enabled(h->pending_event_source, SD_EVENT_ON);
2573 if (r < 0)
2574 return log_error_errno(r, "Failed to trigger pending event source: %m");
2575
2576 return 0;
2577 }
2578
2579 static int home_get_image_path_seat(Home *h, char **ret) {
2580 _cleanup_(sd_device_unrefp) sd_device *d = NULL;
2581 _cleanup_free_ char *c = NULL;
2582 const char *ip, *seat;
2583 struct stat st;
2584 int r;
2585
2586 assert(h);
2587
2588 if (user_record_storage(h->record) != USER_LUKS)
2589 return -ENXIO;
2590
2591 ip = user_record_image_path(h->record);
2592 if (!ip)
2593 return -ENXIO;
2594
2595 if (!path_startswith(ip, "/dev/"))
2596 return -ENXIO;
2597
2598 if (stat(ip, &st) < 0)
2599 return -errno;
2600
2601 if (!S_ISBLK(st.st_mode))
2602 return -ENOTBLK;
2603
2604 r = sd_device_new_from_devnum(&d, 'b', st.st_rdev);
2605 if (r < 0)
2606 return r;
2607
2608 r = sd_device_get_property_value(d, "ID_SEAT", &seat);
2609 if (r == -ENOENT) /* no property means seat0 */
2610 seat = "seat0";
2611 else if (r < 0)
2612 return r;
2613
2614 c = strdup(seat);
2615 if (!c)
2616 return -ENOMEM;
2617
2618 *ret = TAKE_PTR(c);
2619 return 0;
2620 }
2621
2622 int home_auto_login(Home *h, char ***ret_seats) {
2623 _cleanup_free_ char *seat = NULL, *seat2 = NULL;
2624
2625 assert(h);
2626 assert(ret_seats);
2627
2628 (void) home_get_image_path_seat(h, &seat);
2629
2630 if (h->record->auto_login > 0 && !streq_ptr(seat, "seat0")) {
2631 /* For now, when the auto-login boolean is set for a user, let's make it mean
2632 * "seat0". Eventually we can extend the concept and allow configuration of any kind of seat,
2633 * but let's keep simple initially, most likely the feature is interesting on single-user
2634 * systems anyway, only.
2635 *
2636 * We filter out users marked for auto-login in we know for sure their home directory is
2637 * absent. */
2638
2639 if (user_record_test_image_path(h->record) != USER_TEST_ABSENT) {
2640 seat2 = strdup("seat0");
2641 if (!seat2)
2642 return -ENOMEM;
2643 }
2644 }
2645
2646 if (seat || seat2) {
2647 _cleanup_strv_free_ char **list = NULL;
2648 size_t i = 0;
2649
2650 list = new(char*, 3);
2651 if (!list)
2652 return -ENOMEM;
2653
2654 if (seat)
2655 list[i++] = TAKE_PTR(seat);
2656 if (seat2)
2657 list[i++] = TAKE_PTR(seat2);
2658
2659 list[i] = NULL;
2660 *ret_seats = TAKE_PTR(list);
2661 return 1;
2662 }
2663
2664 *ret_seats = NULL;
2665 return 0;
2666 }
2667
2668 int home_set_current_message(Home *h, sd_bus_message *m) {
2669 assert(h);
2670
2671 if (!m)
2672 return 0;
2673
2674 if (h->current_operation)
2675 return -EBUSY;
2676
2677 h->current_operation = operation_new(OPERATION_IMMEDIATE, m);
2678 if (!h->current_operation)
2679 return -ENOMEM;
2680
2681 return 1;
2682 }
2683
2684 static const char* const home_state_table[_HOME_STATE_MAX] = {
2685 [HOME_UNFIXATED] = "unfixated",
2686 [HOME_ABSENT] = "absent",
2687 [HOME_INACTIVE] = "inactive",
2688 [HOME_FIXATING] = "fixating",
2689 [HOME_FIXATING_FOR_ACTIVATION] = "fixating-for-activation",
2690 [HOME_FIXATING_FOR_ACQUIRE] = "fixating-for-acquire",
2691 [HOME_ACTIVATING] = "activating",
2692 [HOME_ACTIVATING_FOR_ACQUIRE] = "activating-for-acquire",
2693 [HOME_DEACTIVATING] = "deactivating",
2694 [HOME_ACTIVE] = "active",
2695 [HOME_LOCKING] = "locking",
2696 [HOME_LOCKED] = "locked",
2697 [HOME_UNLOCKING] = "unlocking",
2698 [HOME_UNLOCKING_FOR_ACQUIRE] = "unlocking-for-acquire",
2699 [HOME_CREATING] = "creating",
2700 [HOME_REMOVING] = "removing",
2701 [HOME_UPDATING] = "updating",
2702 [HOME_UPDATING_WHILE_ACTIVE] = "updating-while-active",
2703 [HOME_RESIZING] = "resizing",
2704 [HOME_RESIZING_WHILE_ACTIVE] = "resizing-while-active",
2705 [HOME_PASSWD] = "passwd",
2706 [HOME_PASSWD_WHILE_ACTIVE] = "passwd-while-active",
2707 [HOME_AUTHENTICATING] = "authenticating",
2708 [HOME_AUTHENTICATING_WHILE_ACTIVE] = "authenticating-while-active",
2709 [HOME_AUTHENTICATING_FOR_ACQUIRE] = "authenticating-for-acquire",
2710 };
2711
2712 DEFINE_STRING_TABLE_LOOKUP(home_state, HomeState);
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