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[thirdparty/systemd.git] / src / core / dbus-unit.c
1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include "sd-bus.h"
4
5 #include "alloc-util.h"
6 #include "bpf-firewall.h"
7 #include "bus-common-errors.h"
8 #include "bus-get-properties.h"
9 #include "bus-polkit.h"
10 #include "cgroup-util.h"
11 #include "condition.h"
12 #include "dbus-job.h"
13 #include "dbus-manager.h"
14 #include "dbus-unit.h"
15 #include "dbus-util.h"
16 #include "dbus.h"
17 #include "fd-util.h"
18 #include "install.h"
19 #include "locale-util.h"
20 #include "log.h"
21 #include "path-util.h"
22 #include "process-util.h"
23 #include "selinux-access.h"
24 #include "service.h"
25 #include "signal-util.h"
26 #include "special.h"
27 #include "string-table.h"
28 #include "string-util.h"
29 #include "strv.h"
30 #include "user-util.h"
31 #include "web-util.h"
32
33 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_collect_mode, collect_mode, CollectMode);
34 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_load_state, unit_load_state, UnitLoadState);
35 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_job_mode, job_mode, JobMode);
36 static BUS_DEFINE_PROPERTY_GET(property_get_description, "s", Unit, unit_description);
37 static BUS_DEFINE_PROPERTY_GET2(property_get_active_state, "s", Unit, unit_active_state, unit_active_state_to_string);
38 static BUS_DEFINE_PROPERTY_GET2(property_get_freezer_state, "s", Unit, unit_freezer_state, freezer_state_to_string);
39 static BUS_DEFINE_PROPERTY_GET(property_get_sub_state, "s", Unit, unit_sub_state_to_string);
40 static BUS_DEFINE_PROPERTY_GET2(property_get_unit_file_state, "s", Unit, unit_get_unit_file_state, unit_file_state_to_string);
41 static BUS_DEFINE_PROPERTY_GET(property_get_can_reload, "b", Unit, unit_can_reload);
42 static BUS_DEFINE_PROPERTY_GET(property_get_can_start, "b", Unit, unit_can_start_refuse_manual);
43 static BUS_DEFINE_PROPERTY_GET(property_get_can_stop, "b", Unit, unit_can_stop_refuse_manual);
44 static BUS_DEFINE_PROPERTY_GET(property_get_can_isolate, "b", Unit, unit_can_isolate_refuse_manual);
45 static BUS_DEFINE_PROPERTY_GET(property_get_can_freeze, "b", Unit, unit_can_freeze);
46 static BUS_DEFINE_PROPERTY_GET(property_get_need_daemon_reload, "b", Unit, unit_need_daemon_reload);
47 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_empty_strv, "as", 0);
48
49 static int property_get_can_clean(
50 sd_bus *bus,
51 const char *path,
52 const char *interface,
53 const char *property,
54 sd_bus_message *reply,
55 void *userdata,
56 sd_bus_error *error) {
57
58 Unit *u = userdata;
59 ExecCleanMask mask;
60 int r;
61
62 assert(bus);
63 assert(reply);
64
65 r = unit_can_clean(u, &mask);
66 if (r < 0)
67 return r;
68
69 r = sd_bus_message_open_container(reply, 'a', "s");
70 if (r < 0)
71 return r;
72
73 for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) {
74 if (!FLAGS_SET(mask, 1U << t))
75 continue;
76
77 r = sd_bus_message_append(reply, "s", exec_resource_type_to_string(t));
78 if (r < 0)
79 return r;
80 }
81
82 if (FLAGS_SET(mask, EXEC_CLEAN_FDSTORE)) {
83 r = sd_bus_message_append(reply, "s", "fdstore");
84 if (r < 0)
85 return r;
86 }
87
88 return sd_bus_message_close_container(reply);
89 }
90
91 static int property_get_names(
92 sd_bus *bus,
93 const char *path,
94 const char *interface,
95 const char *property,
96 sd_bus_message *reply,
97 void *userdata,
98 sd_bus_error *error) {
99
100 Unit *u = ASSERT_PTR(userdata);
101 const char *t;
102 int r;
103
104 assert(bus);
105 assert(reply);
106
107 r = sd_bus_message_open_container(reply, 'a', "s");
108 if (r < 0)
109 return r;
110
111 r = sd_bus_message_append(reply, "s", u->id);
112 if (r < 0)
113 return r;
114
115 SET_FOREACH(t, u->aliases) {
116 r = sd_bus_message_append(reply, "s", t);
117 if (r < 0)
118 return r;
119 }
120
121 return sd_bus_message_close_container(reply);
122 }
123
124 static int property_get_following(
125 sd_bus *bus,
126 const char *path,
127 const char *interface,
128 const char *property,
129 sd_bus_message *reply,
130 void *userdata,
131 sd_bus_error *error) {
132
133 Unit *u = userdata, *f;
134
135 assert(bus);
136 assert(reply);
137 assert(u);
138
139 f = unit_following(u);
140 return sd_bus_message_append(reply, "s", f ? f->id : NULL);
141 }
142
143 static int property_get_dependencies(
144 sd_bus *bus,
145 const char *path,
146 const char *interface,
147 const char *property,
148 sd_bus_message *reply,
149 void *userdata,
150 sd_bus_error *error) {
151
152 Unit *u = userdata, *other;
153 UnitDependency d;
154 Hashmap *deps;
155 void *v;
156 int r;
157
158 assert(bus);
159 assert(reply);
160 assert(u);
161
162 d = unit_dependency_from_string(property);
163 assert_se(d >= 0);
164
165 deps = unit_get_dependencies(u, d);
166
167 r = sd_bus_message_open_container(reply, 'a', "s");
168 if (r < 0)
169 return r;
170
171 HASHMAP_FOREACH_KEY(v, other, deps) {
172 r = sd_bus_message_append(reply, "s", other->id);
173 if (r < 0)
174 return r;
175 }
176
177 return sd_bus_message_close_container(reply);
178 }
179
180 static int property_get_mounts_for(
181 sd_bus *bus,
182 const char *path,
183 const char *interface,
184 const char *property,
185 sd_bus_message *reply,
186 void *userdata,
187 sd_bus_error *error) {
188
189 Hashmap **h = ASSERT_PTR(userdata);
190 const char *p;
191 void *v;
192 int r;
193
194 assert(bus);
195 assert(reply);
196
197 r = sd_bus_message_open_container(reply, 'a', "s");
198 if (r < 0)
199 return r;
200
201 HASHMAP_FOREACH_KEY(v, p, *h) {
202 r = sd_bus_message_append(reply, "s", p);
203 if (r < 0)
204 return r;
205 }
206
207 return sd_bus_message_close_container(reply);
208 }
209
210 static int property_get_unit_file_preset(
211 sd_bus *bus,
212 const char *path,
213 const char *interface,
214 const char *property,
215 sd_bus_message *reply,
216 void *userdata,
217 sd_bus_error *error) {
218
219 Unit *u = ASSERT_PTR(userdata);
220 int r;
221
222 assert(bus);
223 assert(reply);
224
225 r = unit_get_unit_file_preset(u);
226
227 return sd_bus_message_append(reply, "s", preset_action_past_tense_to_string(r));
228 }
229
230 static int property_get_job(
231 sd_bus *bus,
232 const char *path,
233 const char *interface,
234 const char *property,
235 sd_bus_message *reply,
236 void *userdata,
237 sd_bus_error *error) {
238
239 _cleanup_free_ char *p = NULL;
240 Job **j = ASSERT_PTR(userdata);
241
242 assert(bus);
243 assert(reply);
244
245 if (!*j)
246 return sd_bus_message_append(reply, "(uo)", 0, "/");
247
248 p = job_dbus_path(*j);
249 if (!p)
250 return -ENOMEM;
251
252 return sd_bus_message_append(reply, "(uo)", (*j)->id, p);
253 }
254
255 static int property_get_conditions(
256 sd_bus *bus,
257 const char *path,
258 const char *interface,
259 const char *property,
260 sd_bus_message *reply,
261 void *userdata,
262 sd_bus_error *error) {
263
264 const char *(*to_string)(ConditionType type) = NULL;
265 Condition **list = ASSERT_PTR(userdata);
266 int r;
267
268 assert(bus);
269 assert(reply);
270
271 to_string = streq(property, "Asserts") ? assert_type_to_string : condition_type_to_string;
272
273 r = sd_bus_message_open_container(reply, 'a', "(sbbsi)");
274 if (r < 0)
275 return r;
276
277 LIST_FOREACH(conditions, c, *list) {
278 int tristate;
279
280 tristate =
281 c->result == CONDITION_UNTESTED ? 0 :
282 c->result == CONDITION_SUCCEEDED ? 1 : -1;
283
284 r = sd_bus_message_append(reply, "(sbbsi)",
285 to_string(c->type),
286 c->trigger, c->negate,
287 c->parameter, tristate);
288 if (r < 0)
289 return r;
290
291 }
292
293 return sd_bus_message_close_container(reply);
294 }
295
296 static int property_get_load_error(
297 sd_bus *bus,
298 const char *path,
299 const char *interface,
300 const char *property,
301 sd_bus_message *reply,
302 void *userdata,
303 sd_bus_error *error) {
304
305 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
306 Unit *u = ASSERT_PTR(userdata);
307 int r;
308
309 assert(bus);
310 assert(reply);
311
312 r = bus_unit_validate_load_state(u, &e);
313 if (r < 0)
314 return sd_bus_message_append(reply, "(ss)", e.name, e.message);
315
316 return sd_bus_message_append(reply, "(ss)", NULL, NULL);
317 }
318
319 static int property_get_markers(
320 sd_bus *bus,
321 const char *path,
322 const char *interface,
323 const char *property,
324 sd_bus_message *reply,
325 void *userdata,
326 sd_bus_error *error) {
327
328 unsigned *markers = ASSERT_PTR(userdata);
329 int r;
330
331 assert(bus);
332 assert(reply);
333
334 r = sd_bus_message_open_container(reply, 'a', "s");
335 if (r < 0)
336 return r;
337
338 /* Make sure out values fit in the bitfield. */
339 assert_cc(_UNIT_MARKER_MAX <= sizeof(((Unit){}).markers) * 8);
340
341 for (UnitMarker m = 0; m < _UNIT_MARKER_MAX; m++)
342 if (FLAGS_SET(*markers, 1u << m)) {
343 r = sd_bus_message_append(reply, "s", unit_marker_to_string(m));
344 if (r < 0)
345 return r;
346 }
347
348 return sd_bus_message_close_container(reply);
349 }
350
351 static const char *const polkit_message_for_job[_JOB_TYPE_MAX] = {
352 [JOB_START] = N_("Authentication is required to start '$(unit)'."),
353 [JOB_STOP] = N_("Authentication is required to stop '$(unit)'."),
354 [JOB_RELOAD] = N_("Authentication is required to reload '$(unit)'."),
355 [JOB_RESTART] = N_("Authentication is required to restart '$(unit)'."),
356 [JOB_TRY_RESTART] = N_("Authentication is required to restart '$(unit)'."),
357 };
358
359 int bus_unit_method_start_generic(
360 sd_bus_message *message,
361 Unit *u,
362 JobType job_type,
363 bool reload_if_possible,
364 sd_bus_error *error) {
365
366 BusUnitQueueFlags job_flags = reload_if_possible ? BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE : 0;
367 const char *smode, *verb;
368 JobMode mode;
369 int r;
370
371 assert(message);
372 assert(u);
373 assert(job_type >= 0 && job_type < _JOB_TYPE_MAX);
374
375 r = mac_selinux_unit_access_check(
376 u, message,
377 job_type_to_access_method(job_type),
378 error);
379 if (r < 0)
380 return r;
381
382 r = sd_bus_message_read(message, "s", &smode);
383 if (r < 0)
384 return r;
385
386 mode = job_mode_from_string(smode);
387 if (mode < 0)
388 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job mode %s invalid", smode);
389
390 if (reload_if_possible)
391 verb = strjoina("reload-or-", job_type_to_string(job_type));
392 else
393 verb = job_type_to_string(job_type);
394
395 if (sd_bus_message_is_method_call(message, NULL, "StartUnitWithFlags")) {
396 uint64_t input_flags = 0;
397
398 r = sd_bus_message_read(message, "t", &input_flags);
399 if (r < 0)
400 return r;
401 /* Let clients know that this version doesn't support any flags at the moment. */
402 if (input_flags != 0)
403 return sd_bus_reply_method_errorf(message, SD_BUS_ERROR_INVALID_ARGS,
404 "Invalid 'flags' parameter '%" PRIu64 "'",
405 input_flags);
406 }
407
408 r = bus_verify_manage_units_async_full(
409 u,
410 verb,
411 polkit_message_for_job[job_type],
412 message,
413 error);
414 if (r < 0)
415 return r;
416 if (r == 0)
417 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
418
419 return bus_unit_queue_job(message, u, job_type, mode, job_flags, error);
420 }
421
422 static int bus_unit_method_start(sd_bus_message *message, void *userdata, sd_bus_error *error) {
423 return bus_unit_method_start_generic(message, userdata, JOB_START, false, error);
424 }
425
426 static int bus_unit_method_stop(sd_bus_message *message, void *userdata, sd_bus_error *error) {
427 return bus_unit_method_start_generic(message, userdata, JOB_STOP, false, error);
428 }
429
430 static int bus_unit_method_reload(sd_bus_message *message, void *userdata, sd_bus_error *error) {
431 return bus_unit_method_start_generic(message, userdata, JOB_RELOAD, false, error);
432 }
433
434 static int bus_unit_method_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
435 return bus_unit_method_start_generic(message, userdata, JOB_RESTART, false, error);
436 }
437
438 static int bus_unit_method_try_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
439 return bus_unit_method_start_generic(message, userdata, JOB_TRY_RESTART, false, error);
440 }
441
442 static int bus_unit_method_reload_or_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
443 return bus_unit_method_start_generic(message, userdata, JOB_RESTART, true, error);
444 }
445
446 static int bus_unit_method_reload_or_try_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
447 return bus_unit_method_start_generic(message, userdata, JOB_TRY_RESTART, true, error);
448 }
449
450 int bus_unit_method_enqueue_job(sd_bus_message *message, void *userdata, sd_bus_error *error) {
451 BusUnitQueueFlags flags = BUS_UNIT_QUEUE_VERBOSE_REPLY;
452 const char *jtype, *smode;
453 Unit *u = ASSERT_PTR(userdata);
454 JobType type;
455 JobMode mode;
456 int r;
457
458 assert(message);
459
460 r = sd_bus_message_read(message, "ss", &jtype, &smode);
461 if (r < 0)
462 return r;
463
464 /* Parse the two magic reload types "reload-or-…" manually */
465 if (streq(jtype, "reload-or-restart")) {
466 type = JOB_RESTART;
467 flags |= BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE;
468 } else if (streq(jtype, "reload-or-try-restart")) {
469 type = JOB_TRY_RESTART;
470 flags |= BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE;
471 } else {
472 /* And the rest generically */
473 type = job_type_from_string(jtype);
474 if (type < 0)
475 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job type %s invalid", jtype);
476 }
477
478 mode = job_mode_from_string(smode);
479 if (mode < 0)
480 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job mode %s invalid", smode);
481
482 r = mac_selinux_unit_access_check(
483 u, message,
484 job_type_to_access_method(type),
485 error);
486 if (r < 0)
487 return r;
488
489 r = bus_verify_manage_units_async_full(
490 u,
491 jtype,
492 polkit_message_for_job[type],
493 message,
494 error);
495 if (r < 0)
496 return r;
497 if (r == 0)
498 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
499
500 return bus_unit_queue_job(message, u, type, mode, flags, error);
501 }
502
503 int bus_unit_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) {
504 Unit *u = ASSERT_PTR(userdata);
505 int32_t value = 0;
506 const char *swho;
507 int32_t signo;
508 KillWho who;
509 int r, code;
510
511 assert(message);
512
513 r = mac_selinux_unit_access_check(u, message, "stop", error);
514 if (r < 0)
515 return r;
516
517 r = sd_bus_message_read(message, "si", &swho, &signo);
518 if (r < 0)
519 return r;
520
521 if (startswith(sd_bus_message_get_member(message), "QueueSignal")) {
522 r = sd_bus_message_read(message, "i", &value);
523 if (r < 0)
524 return r;
525
526 code = SI_QUEUE;
527 } else
528 code = SI_USER;
529
530 if (isempty(swho))
531 who = KILL_ALL;
532 else {
533 who = kill_who_from_string(swho);
534 if (who < 0)
535 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid who argument: %s", swho);
536 }
537
538 if (!SIGNAL_VALID(signo))
539 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Signal number out of range.");
540
541 if (code == SI_QUEUE && !((signo >= SIGRTMIN) && (signo <= SIGRTMAX)))
542 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
543 "Value parameter only accepted for realtime signals (SIGRTMIN…SIGRTMAX), refusing for signal SIG%s.", signal_to_string(signo));
544
545 r = bus_verify_manage_units_async_full(
546 u,
547 "kill",
548 N_("Authentication is required to send a UNIX signal to the processes of '$(unit)'."),
549 message,
550 error);
551 if (r < 0)
552 return r;
553 if (r == 0)
554 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
555
556 r = unit_kill(u, who, signo, code, value, error);
557 if (r < 0)
558 return r;
559
560 return sd_bus_reply_method_return(message, NULL);
561 }
562
563 int bus_unit_method_reset_failed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
564 Unit *u = ASSERT_PTR(userdata);
565 int r;
566
567 assert(message);
568
569 r = mac_selinux_unit_access_check(u, message, "reload", error);
570 if (r < 0)
571 return r;
572
573 r = bus_verify_manage_units_async_full(
574 u,
575 "reset-failed",
576 N_("Authentication is required to reset the \"failed\" state of '$(unit)'."),
577 message,
578 error);
579 if (r < 0)
580 return r;
581 if (r == 0)
582 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
583
584 unit_reset_failed(u);
585
586 return sd_bus_reply_method_return(message, NULL);
587 }
588
589 int bus_unit_method_set_properties(sd_bus_message *message, void *userdata, sd_bus_error *error) {
590 Unit *u = ASSERT_PTR(userdata);
591 int runtime, r;
592
593 assert(message);
594
595 r = mac_selinux_unit_access_check(u, message, "start", error);
596 if (r < 0)
597 return r;
598
599 r = sd_bus_message_read(message, "b", &runtime);
600 if (r < 0)
601 return r;
602
603 r = bus_verify_manage_units_async_full(
604 u,
605 "set-property",
606 N_("Authentication is required to set properties on '$(unit)'."),
607 message,
608 error);
609 if (r < 0)
610 return r;
611 if (r == 0)
612 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
613
614 r = bus_unit_set_properties(u, message, runtime ? UNIT_RUNTIME : UNIT_PERSISTENT, true, error);
615 if (r < 0)
616 return r;
617
618 return sd_bus_reply_method_return(message, NULL);
619 }
620
621 int bus_unit_method_ref(sd_bus_message *message, void *userdata, sd_bus_error *error) {
622 Unit *u = ASSERT_PTR(userdata);
623 int r;
624
625 assert(message);
626
627 r = mac_selinux_unit_access_check(u, message, "start", error);
628 if (r < 0)
629 return r;
630
631 r = bus_verify_manage_units_async_full(
632 u,
633 "ref",
634 /* polkit_message= */ NULL,
635 message,
636 error);
637 if (r < 0)
638 return r;
639 if (r == 0)
640 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
641
642 r = bus_unit_track_add_sender(u, message);
643 if (r < 0)
644 return r;
645
646 return sd_bus_reply_method_return(message, NULL);
647 }
648
649 int bus_unit_method_unref(sd_bus_message *message, void *userdata, sd_bus_error *error) {
650 Unit *u = ASSERT_PTR(userdata);
651 int r;
652
653 assert(message);
654
655 r = bus_unit_track_remove_sender(u, message);
656 if (r == -EUNATCH)
657 return sd_bus_error_set(error, BUS_ERROR_NOT_REFERENCED, "Unit has not been referenced yet.");
658 if (r < 0)
659 return r;
660
661 return sd_bus_reply_method_return(message, NULL);
662 }
663
664 int bus_unit_method_clean(sd_bus_message *message, void *userdata, sd_bus_error *error) {
665 ExecCleanMask mask = 0;
666 Unit *u = ASSERT_PTR(userdata);
667 int r;
668
669 assert(message);
670
671 r = mac_selinux_unit_access_check(u, message, "stop", error);
672 if (r < 0)
673 return r;
674
675 r = sd_bus_message_enter_container(message, 'a', "s");
676 if (r < 0)
677 return r;
678
679 for (;;) {
680 ExecCleanMask m;
681 const char *i;
682
683 r = sd_bus_message_read(message, "s", &i);
684 if (r < 0)
685 return r;
686 if (r == 0)
687 break;
688
689 m = exec_clean_mask_from_string(i);
690 if (m < 0)
691 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid resource type: %s", i);
692
693 mask |= m;
694 }
695
696 r = sd_bus_message_exit_container(message);
697 if (r < 0)
698 return r;
699
700 r = bus_verify_manage_units_async_full(
701 u,
702 "clean",
703 N_("Authentication is required to delete files and directories associated with '$(unit)'."),
704 message,
705 error);
706 if (r < 0)
707 return r;
708 if (r == 0)
709 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
710
711 r = unit_clean(u, mask);
712 if (r == -EOPNOTSUPP)
713 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Unit '%s' does not support cleaning.", u->id);
714 if (r == -EUNATCH)
715 return sd_bus_error_set(error, BUS_ERROR_NOTHING_TO_CLEAN, "No matching resources found.");
716 if (r == -EBUSY)
717 return sd_bus_error_set(error, BUS_ERROR_UNIT_BUSY, "Unit is not inactive or has pending job.");
718 if (r < 0)
719 return r;
720
721 return sd_bus_reply_method_return(message, NULL);
722 }
723
724 static int bus_unit_method_freezer_generic(sd_bus_message *message, void *userdata, sd_bus_error *error, FreezerAction action) {
725 const char* perm;
726 int (*method)(Unit*);
727 Unit *u = ASSERT_PTR(userdata);
728 bool reply_no_delay = false;
729 int r;
730
731 assert(message);
732 assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW));
733
734 if (action == FREEZER_FREEZE) {
735 perm = "stop";
736 method = unit_freeze;
737 } else {
738 perm = "start";
739 method = unit_thaw;
740 }
741
742 r = mac_selinux_unit_access_check(u, message, perm, error);
743 if (r < 0)
744 return r;
745
746 r = bus_verify_manage_units_async_full(
747 u,
748 perm,
749 N_("Authentication is required to freeze or thaw the processes of '$(unit)' unit."),
750 message,
751 error);
752 if (r < 0)
753 return r;
754 if (r == 0)
755 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
756
757 r = method(u);
758 if (r == -EOPNOTSUPP)
759 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Unit '%s' does not support freezing.", u->id);
760 if (r == -EBUSY)
761 return sd_bus_error_set(error, BUS_ERROR_UNIT_BUSY, "Unit has a pending job.");
762 if (r == -EHOSTDOWN)
763 return sd_bus_error_set(error, BUS_ERROR_UNIT_INACTIVE, "Unit is inactive.");
764 if (r == -EALREADY)
765 return sd_bus_error_setf(error, SD_BUS_ERROR_FAILED, "Previously requested freezer operation for unit '%s' is still in progress.", u->id);
766 if (r < 0)
767 return r;
768 if (r == 0)
769 reply_no_delay = true;
770
771 if (u->pending_freezer_invocation) {
772 bus_unit_send_pending_freezer_message(u, true);
773 assert(!u->pending_freezer_invocation);
774 }
775
776 u->pending_freezer_invocation = sd_bus_message_ref(message);
777
778 if (reply_no_delay) {
779 r = bus_unit_send_pending_freezer_message(u, false);
780 if (r < 0)
781 return r;
782 }
783
784 return 1;
785 }
786
787 int bus_unit_method_thaw(sd_bus_message *message, void *userdata, sd_bus_error *error) {
788 return bus_unit_method_freezer_generic(message, userdata, error, FREEZER_THAW);
789 }
790
791 int bus_unit_method_freeze(sd_bus_message *message, void *userdata, sd_bus_error *error) {
792 return bus_unit_method_freezer_generic(message, userdata, error, FREEZER_FREEZE);
793 }
794
795 static int property_get_refs(
796 sd_bus *bus,
797 const char *path,
798 const char *interface,
799 const char *property,
800 sd_bus_message *reply,
801 void *userdata,
802 sd_bus_error *error) {
803
804 Unit *u = userdata;
805 int r;
806
807 assert(bus);
808 assert(reply);
809
810 r = sd_bus_message_open_container(reply, 'a', "s");
811 if (r < 0)
812 return r;
813
814 for (const char *i = sd_bus_track_first(u->bus_track); i; i = sd_bus_track_next(u->bus_track)) {
815 int c;
816
817 c = sd_bus_track_count_name(u->bus_track, i);
818 if (c < 0)
819 return c;
820
821 /* Add the item multiple times if the ref count for each is above 1 */
822 for (int k = 0; k < c; k++) {
823 r = sd_bus_message_append(reply, "s", i);
824 if (r < 0)
825 return r;
826 }
827 }
828
829 return sd_bus_message_close_container(reply);
830 }
831
832 const sd_bus_vtable bus_unit_vtable[] = {
833 SD_BUS_VTABLE_START(0),
834
835 SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Unit, id), SD_BUS_VTABLE_PROPERTY_CONST),
836 SD_BUS_PROPERTY("Names", "as", property_get_names, 0, SD_BUS_VTABLE_PROPERTY_CONST),
837 SD_BUS_PROPERTY("Following", "s", property_get_following, 0, 0),
838 SD_BUS_PROPERTY("Requires", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
839 SD_BUS_PROPERTY("Requisite", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
840 SD_BUS_PROPERTY("Wants", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
841 SD_BUS_PROPERTY("BindsTo", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
842 SD_BUS_PROPERTY("PartOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
843 SD_BUS_PROPERTY("Upholds", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
844 SD_BUS_PROPERTY("RequiredBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
845 SD_BUS_PROPERTY("RequisiteOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
846 SD_BUS_PROPERTY("WantedBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
847 SD_BUS_PROPERTY("BoundBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
848 SD_BUS_PROPERTY("UpheldBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
849 SD_BUS_PROPERTY("ConsistsOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
850 SD_BUS_PROPERTY("Conflicts", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
851 SD_BUS_PROPERTY("ConflictedBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
852 SD_BUS_PROPERTY("Before", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
853 SD_BUS_PROPERTY("After", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
854 SD_BUS_PROPERTY("OnSuccess", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
855 SD_BUS_PROPERTY("OnSuccessOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
856 SD_BUS_PROPERTY("OnFailure", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
857 SD_BUS_PROPERTY("OnFailureOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
858 SD_BUS_PROPERTY("Triggers", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
859 SD_BUS_PROPERTY("TriggeredBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
860 SD_BUS_PROPERTY("PropagatesReloadTo", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
861 SD_BUS_PROPERTY("ReloadPropagatedFrom", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
862 SD_BUS_PROPERTY("PropagatesStopTo", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
863 SD_BUS_PROPERTY("StopPropagatedFrom", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
864 SD_BUS_PROPERTY("JoinsNamespaceOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
865 SD_BUS_PROPERTY("SliceOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
866 SD_BUS_PROPERTY("RequiresMountsFor", "as", property_get_mounts_for, offsetof(Unit, mounts_for[UNIT_MOUNT_REQUIRES]), SD_BUS_VTABLE_PROPERTY_CONST),
867 SD_BUS_PROPERTY("WantsMountsFor", "as", property_get_mounts_for, offsetof(Unit, mounts_for[UNIT_MOUNT_WANTS]), SD_BUS_VTABLE_PROPERTY_CONST),
868 SD_BUS_PROPERTY("Documentation", "as", NULL, offsetof(Unit, documentation), SD_BUS_VTABLE_PROPERTY_CONST),
869 SD_BUS_PROPERTY("Description", "s", property_get_description, 0, SD_BUS_VTABLE_PROPERTY_CONST),
870 SD_BUS_PROPERTY("AccessSELinuxContext", "s", NULL, offsetof(Unit, access_selinux_context), SD_BUS_VTABLE_PROPERTY_CONST),
871 SD_BUS_PROPERTY("LoadState", "s", property_get_load_state, offsetof(Unit, load_state), SD_BUS_VTABLE_PROPERTY_CONST),
872 SD_BUS_PROPERTY("ActiveState", "s", property_get_active_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
873 SD_BUS_PROPERTY("FreezerState", "s", property_get_freezer_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
874 SD_BUS_PROPERTY("SubState", "s", property_get_sub_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
875 SD_BUS_PROPERTY("FragmentPath", "s", NULL, offsetof(Unit, fragment_path), SD_BUS_VTABLE_PROPERTY_CONST),
876 SD_BUS_PROPERTY("SourcePath", "s", NULL, offsetof(Unit, source_path), SD_BUS_VTABLE_PROPERTY_CONST),
877 SD_BUS_PROPERTY("DropInPaths", "as", NULL, offsetof(Unit, dropin_paths), SD_BUS_VTABLE_PROPERTY_CONST),
878 SD_BUS_PROPERTY("UnitFileState", "s", property_get_unit_file_state, 0, 0),
879 SD_BUS_PROPERTY("UnitFilePreset", "s", property_get_unit_file_preset, 0, 0),
880 BUS_PROPERTY_DUAL_TIMESTAMP("StateChangeTimestamp", offsetof(Unit, state_change_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
881 BUS_PROPERTY_DUAL_TIMESTAMP("InactiveExitTimestamp", offsetof(Unit, inactive_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
882 BUS_PROPERTY_DUAL_TIMESTAMP("ActiveEnterTimestamp", offsetof(Unit, active_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
883 BUS_PROPERTY_DUAL_TIMESTAMP("ActiveExitTimestamp", offsetof(Unit, active_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
884 BUS_PROPERTY_DUAL_TIMESTAMP("InactiveEnterTimestamp", offsetof(Unit, inactive_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
885 SD_BUS_PROPERTY("CanStart", "b", property_get_can_start, 0, SD_BUS_VTABLE_PROPERTY_CONST),
886 SD_BUS_PROPERTY("CanStop", "b", property_get_can_stop, 0, SD_BUS_VTABLE_PROPERTY_CONST),
887 SD_BUS_PROPERTY("CanReload", "b", property_get_can_reload, 0, SD_BUS_VTABLE_PROPERTY_CONST),
888 SD_BUS_PROPERTY("CanIsolate", "b", property_get_can_isolate, 0, SD_BUS_VTABLE_PROPERTY_CONST),
889 SD_BUS_PROPERTY("CanClean", "as", property_get_can_clean, 0, SD_BUS_VTABLE_PROPERTY_CONST),
890 SD_BUS_PROPERTY("CanFreeze", "b", property_get_can_freeze, 0, SD_BUS_VTABLE_PROPERTY_CONST),
891 SD_BUS_PROPERTY("Job", "(uo)", property_get_job, offsetof(Unit, job), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
892 SD_BUS_PROPERTY("StopWhenUnneeded", "b", bus_property_get_bool, offsetof(Unit, stop_when_unneeded), SD_BUS_VTABLE_PROPERTY_CONST),
893 SD_BUS_PROPERTY("RefuseManualStart", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_start), SD_BUS_VTABLE_PROPERTY_CONST),
894 SD_BUS_PROPERTY("RefuseManualStop", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_stop), SD_BUS_VTABLE_PROPERTY_CONST),
895 SD_BUS_PROPERTY("AllowIsolate", "b", bus_property_get_bool, offsetof(Unit, allow_isolate), SD_BUS_VTABLE_PROPERTY_CONST),
896 SD_BUS_PROPERTY("DefaultDependencies", "b", bus_property_get_bool, offsetof(Unit, default_dependencies), SD_BUS_VTABLE_PROPERTY_CONST),
897 SD_BUS_PROPERTY("SurviveFinalKillSignal", "b", bus_property_get_bool, offsetof(Unit, survive_final_kill_signal), SD_BUS_VTABLE_PROPERTY_CONST),
898 SD_BUS_PROPERTY("OnSuccesJobMode", "s", property_get_job_mode, offsetof(Unit, on_success_job_mode), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN), /* deprecated */
899 SD_BUS_PROPERTY("OnSuccessJobMode", "s", property_get_job_mode, offsetof(Unit, on_success_job_mode), SD_BUS_VTABLE_PROPERTY_CONST),
900 SD_BUS_PROPERTY("OnFailureJobMode", "s", property_get_job_mode, offsetof(Unit, on_failure_job_mode), SD_BUS_VTABLE_PROPERTY_CONST),
901 SD_BUS_PROPERTY("IgnoreOnIsolate", "b", bus_property_get_bool, offsetof(Unit, ignore_on_isolate), SD_BUS_VTABLE_PROPERTY_CONST),
902 SD_BUS_PROPERTY("NeedDaemonReload", "b", property_get_need_daemon_reload, 0, 0),
903 SD_BUS_PROPERTY("Markers", "as", property_get_markers, offsetof(Unit, markers), 0),
904 SD_BUS_PROPERTY("JobTimeoutUSec", "t", bus_property_get_usec, offsetof(Unit, job_timeout), SD_BUS_VTABLE_PROPERTY_CONST),
905 SD_BUS_PROPERTY("JobRunningTimeoutUSec", "t", bus_property_get_usec, offsetof(Unit, job_running_timeout), SD_BUS_VTABLE_PROPERTY_CONST),
906 SD_BUS_PROPERTY("JobTimeoutAction", "s", bus_property_get_emergency_action, offsetof(Unit, job_timeout_action), SD_BUS_VTABLE_PROPERTY_CONST),
907 SD_BUS_PROPERTY("JobTimeoutRebootArgument", "s", NULL, offsetof(Unit, job_timeout_reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST),
908 SD_BUS_PROPERTY("ConditionResult", "b", bus_property_get_bool, offsetof(Unit, condition_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
909 SD_BUS_PROPERTY("AssertResult", "b", bus_property_get_bool, offsetof(Unit, assert_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
910 BUS_PROPERTY_DUAL_TIMESTAMP("ConditionTimestamp", offsetof(Unit, condition_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
911 BUS_PROPERTY_DUAL_TIMESTAMP("AssertTimestamp", offsetof(Unit, assert_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
912 SD_BUS_PROPERTY("Conditions", "a(sbbsi)", property_get_conditions, offsetof(Unit, conditions), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
913 SD_BUS_PROPERTY("Asserts", "a(sbbsi)", property_get_conditions, offsetof(Unit, asserts), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
914 SD_BUS_PROPERTY("LoadError", "(ss)", property_get_load_error, 0, SD_BUS_VTABLE_PROPERTY_CONST),
915 SD_BUS_PROPERTY("Transient", "b", bus_property_get_bool, offsetof(Unit, transient), SD_BUS_VTABLE_PROPERTY_CONST),
916 SD_BUS_PROPERTY("Perpetual", "b", bus_property_get_bool, offsetof(Unit, perpetual), SD_BUS_VTABLE_PROPERTY_CONST),
917 SD_BUS_PROPERTY("StartLimitIntervalUSec", "t", bus_property_get_usec, offsetof(Unit, start_ratelimit.interval), SD_BUS_VTABLE_PROPERTY_CONST),
918 SD_BUS_PROPERTY("StartLimitBurst", "u", bus_property_get_unsigned, offsetof(Unit, start_ratelimit.burst), SD_BUS_VTABLE_PROPERTY_CONST),
919 SD_BUS_PROPERTY("StartLimitAction", "s", bus_property_get_emergency_action, offsetof(Unit, start_limit_action), SD_BUS_VTABLE_PROPERTY_CONST),
920 SD_BUS_PROPERTY("FailureAction", "s", bus_property_get_emergency_action, offsetof(Unit, failure_action), SD_BUS_VTABLE_PROPERTY_CONST),
921 SD_BUS_PROPERTY("FailureActionExitStatus", "i", bus_property_get_int, offsetof(Unit, failure_action_exit_status), SD_BUS_VTABLE_PROPERTY_CONST),
922 SD_BUS_PROPERTY("SuccessAction", "s", bus_property_get_emergency_action, offsetof(Unit, success_action), SD_BUS_VTABLE_PROPERTY_CONST),
923 SD_BUS_PROPERTY("SuccessActionExitStatus", "i", bus_property_get_int, offsetof(Unit, success_action_exit_status), SD_BUS_VTABLE_PROPERTY_CONST),
924 SD_BUS_PROPERTY("RebootArgument", "s", NULL, offsetof(Unit, reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST),
925 SD_BUS_PROPERTY("InvocationID", "ay", bus_property_get_id128, offsetof(Unit, invocation_id), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
926 SD_BUS_PROPERTY("CollectMode", "s", property_get_collect_mode, offsetof(Unit, collect_mode), SD_BUS_VTABLE_PROPERTY_CONST),
927 SD_BUS_PROPERTY("Refs", "as", property_get_refs, 0, 0),
928 SD_BUS_PROPERTY("ActivationDetails", "a(ss)", bus_property_get_activation_details, offsetof(Unit, activation_details), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
929
930 SD_BUS_METHOD_WITH_ARGS("Start",
931 SD_BUS_ARGS("s", mode),
932 SD_BUS_RESULT("o", job),
933 bus_unit_method_start,
934 SD_BUS_VTABLE_UNPRIVILEGED),
935 SD_BUS_METHOD_WITH_ARGS("Stop",
936 SD_BUS_ARGS("s", mode),
937 SD_BUS_RESULT("o", job),
938 bus_unit_method_stop,
939 SD_BUS_VTABLE_UNPRIVILEGED),
940 SD_BUS_METHOD_WITH_ARGS("Reload",
941 SD_BUS_ARGS("s", mode),
942 SD_BUS_RESULT("o", job),
943 bus_unit_method_reload,
944 SD_BUS_VTABLE_UNPRIVILEGED),
945 SD_BUS_METHOD_WITH_ARGS("Restart",
946 SD_BUS_ARGS("s", mode),
947 SD_BUS_RESULT("o", job),
948 bus_unit_method_restart,
949 SD_BUS_VTABLE_UNPRIVILEGED),
950 SD_BUS_METHOD_WITH_ARGS("TryRestart",
951 SD_BUS_ARGS("s", mode),
952 SD_BUS_RESULT("o", job),
953 bus_unit_method_try_restart,
954 SD_BUS_VTABLE_UNPRIVILEGED),
955 SD_BUS_METHOD_WITH_ARGS("ReloadOrRestart",
956 SD_BUS_ARGS("s", mode),
957 SD_BUS_RESULT("o", job),
958 bus_unit_method_reload_or_restart,
959 SD_BUS_VTABLE_UNPRIVILEGED),
960 SD_BUS_METHOD_WITH_ARGS("ReloadOrTryRestart",
961 SD_BUS_ARGS("s", mode),
962 SD_BUS_RESULT("o", job),
963 bus_unit_method_reload_or_try_restart,
964 SD_BUS_VTABLE_UNPRIVILEGED),
965 SD_BUS_METHOD_WITH_ARGS("EnqueueJob",
966 SD_BUS_ARGS("s", job_type, "s", job_mode),
967 SD_BUS_RESULT("u", job_id, "o", job_path, "s", unit_id, "o", unit_path, "s", job_type, "a(uosos)", affected_jobs),
968 bus_unit_method_enqueue_job,
969 SD_BUS_VTABLE_UNPRIVILEGED),
970 SD_BUS_METHOD_WITH_ARGS("Kill",
971 SD_BUS_ARGS("s", whom, "i", signal),
972 SD_BUS_NO_RESULT,
973 bus_unit_method_kill,
974 SD_BUS_VTABLE_UNPRIVILEGED),
975 SD_BUS_METHOD_WITH_ARGS("QueueSignal",
976 SD_BUS_ARGS("s", whom, "i", signal, "i", value),
977 SD_BUS_NO_RESULT,
978 bus_unit_method_kill,
979 SD_BUS_VTABLE_UNPRIVILEGED),
980 SD_BUS_METHOD("ResetFailed",
981 NULL,
982 NULL,
983 bus_unit_method_reset_failed,
984 SD_BUS_VTABLE_UNPRIVILEGED),
985 SD_BUS_METHOD_WITH_ARGS("SetProperties",
986 SD_BUS_ARGS("b", runtime, "a(sv)", properties),
987 SD_BUS_NO_RESULT,
988 bus_unit_method_set_properties,
989 SD_BUS_VTABLE_UNPRIVILEGED),
990 SD_BUS_METHOD("Ref",
991 NULL,
992 NULL,
993 bus_unit_method_ref,
994 SD_BUS_VTABLE_UNPRIVILEGED),
995 SD_BUS_METHOD("Unref",
996 NULL,
997 NULL,
998 bus_unit_method_unref,
999 SD_BUS_VTABLE_UNPRIVILEGED),
1000 SD_BUS_METHOD_WITH_ARGS("Clean",
1001 SD_BUS_ARGS("as", mask),
1002 SD_BUS_NO_RESULT,
1003 bus_unit_method_clean,
1004 SD_BUS_VTABLE_UNPRIVILEGED),
1005 SD_BUS_METHOD("Freeze",
1006 NULL,
1007 NULL,
1008 bus_unit_method_freeze,
1009 SD_BUS_VTABLE_UNPRIVILEGED),
1010 SD_BUS_METHOD("Thaw",
1011 NULL,
1012 NULL,
1013 bus_unit_method_thaw,
1014 SD_BUS_VTABLE_UNPRIVILEGED),
1015
1016 /* For dependency types we don't support anymore always return an empty array */
1017 SD_BUS_PROPERTY("RequiresOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN),
1018 SD_BUS_PROPERTY("RequisiteOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN),
1019 SD_BUS_PROPERTY("RequiredByOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN),
1020 SD_BUS_PROPERTY("RequisiteOfOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN),
1021 /* Obsolete alias names */
1022 SD_BUS_PROPERTY("StartLimitInterval", "t", bus_property_get_usec, offsetof(Unit, start_ratelimit.interval), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
1023 SD_BUS_PROPERTY("StartLimitIntervalSec", "t", bus_property_get_usec, offsetof(Unit, start_ratelimit.interval), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
1024
1025 SD_BUS_VTABLE_END
1026 };
1027
1028 static int property_get_slice(
1029 sd_bus *bus,
1030 const char *path,
1031 const char *interface,
1032 const char *property,
1033 sd_bus_message *reply,
1034 void *userdata,
1035 sd_bus_error *error) {
1036
1037 Unit *u = ASSERT_PTR(userdata);
1038
1039 assert(bus);
1040 assert(reply);
1041
1042 return sd_bus_message_append(reply, "s", unit_slice_name(u));
1043 }
1044
1045 static int property_get_current_memory(
1046 sd_bus *bus,
1047 const char *path,
1048 const char *interface,
1049 const char *property,
1050 sd_bus_message *reply,
1051 void *userdata,
1052 sd_bus_error *error) {
1053
1054 uint64_t sz = UINT64_MAX;
1055 Unit *u = ASSERT_PTR(userdata);
1056 int r;
1057
1058 assert(bus);
1059 assert(reply);
1060
1061 r = unit_get_memory_current(u, &sz);
1062 if (r < 0 && r != -ENODATA)
1063 log_unit_warning_errno(u, r, "Failed to get current memory usage from cgroup: %m");
1064
1065 return sd_bus_message_append(reply, "t", sz);
1066 }
1067
1068 static int property_get_available_memory(
1069 sd_bus *bus,
1070 const char *path,
1071 const char *interface,
1072 const char *property,
1073 sd_bus_message *reply,
1074 void *userdata,
1075 sd_bus_error *error) {
1076
1077 uint64_t sz = UINT64_MAX;
1078 Unit *u = ASSERT_PTR(userdata);
1079 int r;
1080
1081 assert(bus);
1082 assert(reply);
1083
1084 r = unit_get_memory_available(u, &sz);
1085 if (r < 0 && r != -ENODATA)
1086 log_unit_warning_errno(u, r, "Failed to get total available memory from cgroup: %m");
1087
1088 return sd_bus_message_append(reply, "t", sz);
1089 }
1090
1091 static int property_get_memory_accounting(
1092 sd_bus *bus,
1093 const char *path,
1094 const char *interface,
1095 const char *property,
1096 sd_bus_message *reply,
1097 void *userdata,
1098 sd_bus_error *error) {
1099
1100 Unit *u = ASSERT_PTR(userdata);
1101 CGroupMemoryAccountingMetric metric;
1102 uint64_t sz = UINT64_MAX;
1103
1104 assert(bus);
1105 assert(reply);
1106
1107 assert_se((metric = cgroup_memory_accounting_metric_from_string(property)) >= 0);
1108 (void) unit_get_memory_accounting(u, metric, &sz);
1109 return sd_bus_message_append(reply, "t", sz);
1110 }
1111
1112 static int property_get_current_tasks(
1113 sd_bus *bus,
1114 const char *path,
1115 const char *interface,
1116 const char *property,
1117 sd_bus_message *reply,
1118 void *userdata,
1119 sd_bus_error *error) {
1120
1121 uint64_t cn = UINT64_MAX;
1122 Unit *u = ASSERT_PTR(userdata);
1123 int r;
1124
1125 assert(bus);
1126 assert(reply);
1127
1128 r = unit_get_tasks_current(u, &cn);
1129 if (r < 0 && r != -ENODATA)
1130 log_unit_warning_errno(u, r, "Failed to get pids.current attribute: %m");
1131
1132 return sd_bus_message_append(reply, "t", cn);
1133 }
1134
1135 static int property_get_cpu_usage(
1136 sd_bus *bus,
1137 const char *path,
1138 const char *interface,
1139 const char *property,
1140 sd_bus_message *reply,
1141 void *userdata,
1142 sd_bus_error *error) {
1143
1144 nsec_t ns = NSEC_INFINITY;
1145 Unit *u = ASSERT_PTR(userdata);
1146 int r;
1147
1148 assert(bus);
1149 assert(reply);
1150
1151 r = unit_get_cpu_usage(u, &ns);
1152 if (r < 0 && r != -ENODATA)
1153 log_unit_warning_errno(u, r, "Failed to get cpuacct.usage attribute: %m");
1154
1155 return sd_bus_message_append(reply, "t", ns);
1156 }
1157
1158 static int property_get_cpuset_cpus(
1159 sd_bus *bus,
1160 const char *path,
1161 const char *interface,
1162 const char *property,
1163 sd_bus_message *reply,
1164 void *userdata,
1165 sd_bus_error *error) {
1166
1167 Unit *u = ASSERT_PTR(userdata);
1168 _cleanup_(cpu_set_reset) CPUSet cpus = {};
1169 _cleanup_free_ uint8_t *array = NULL;
1170 size_t allocated;
1171
1172 assert(bus);
1173 assert(reply);
1174
1175 (void) unit_get_cpuset(u, &cpus, "cpuset.cpus.effective");
1176 (void) cpu_set_to_dbus(&cpus, &array, &allocated);
1177 return sd_bus_message_append_array(reply, 'y', array, allocated);
1178 }
1179
1180 static int property_get_cpuset_mems(
1181 sd_bus *bus,
1182 const char *path,
1183 const char *interface,
1184 const char *property,
1185 sd_bus_message *reply,
1186 void *userdata,
1187 sd_bus_error *error) {
1188
1189 Unit *u = ASSERT_PTR(userdata);
1190 _cleanup_(cpu_set_reset) CPUSet mems = {};
1191 _cleanup_free_ uint8_t *array = NULL;
1192 size_t allocated;
1193
1194 assert(bus);
1195 assert(reply);
1196
1197 (void) unit_get_cpuset(u, &mems, "cpuset.mems.effective");
1198 (void) cpu_set_to_dbus(&mems, &array, &allocated);
1199 return sd_bus_message_append_array(reply, 'y', array, allocated);
1200 }
1201
1202 static int property_get_cgroup(
1203 sd_bus *bus,
1204 const char *path,
1205 const char *interface,
1206 const char *property,
1207 sd_bus_message *reply,
1208 void *userdata,
1209 sd_bus_error *error) {
1210
1211 Unit *u = ASSERT_PTR(userdata);
1212 const char *t = NULL;
1213
1214 assert(bus);
1215 assert(reply);
1216
1217 /* Three cases: a) u->cgroup_path is NULL, in which case the
1218 * unit has no control group, which we report as the empty
1219 * string. b) u->cgroup_path is the empty string, which
1220 * indicates the root cgroup, which we report as "/". c) all
1221 * other cases we report as-is. */
1222
1223 if (u->cgroup_path)
1224 t = empty_to_root(u->cgroup_path);
1225
1226 return sd_bus_message_append(reply, "s", t);
1227 }
1228
1229 static int append_process(sd_bus_message *reply, const char *p, PidRef *pid, Set *pids) {
1230 _cleanup_free_ char *buf = NULL, *cmdline = NULL;
1231 int r;
1232
1233 assert(reply);
1234 assert(pidref_is_set(pid));
1235
1236 r = set_put(pids, PID_TO_PTR(pid->pid));
1237 if (IN_SET(r, 0, -EEXIST))
1238 return 0;
1239 if (r < 0)
1240 return r;
1241
1242 if (!p) {
1243 r = cg_pidref_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &buf);
1244 if (r == -ESRCH)
1245 return 0;
1246 if (r < 0)
1247 return r;
1248
1249 p = buf;
1250 }
1251
1252 (void) pidref_get_cmdline(
1253 pid,
1254 SIZE_MAX,
1255 PROCESS_CMDLINE_COMM_FALLBACK | PROCESS_CMDLINE_QUOTE,
1256 &cmdline);
1257
1258 return sd_bus_message_append(reply,
1259 "(sus)",
1260 p,
1261 (uint32_t) pid->pid,
1262 cmdline);
1263 }
1264
1265 static int append_cgroup(sd_bus_message *reply, const char *p, Set *pids) {
1266 _cleanup_closedir_ DIR *d = NULL;
1267 _cleanup_fclose_ FILE *f = NULL;
1268 int r;
1269
1270 assert(reply);
1271 assert(p);
1272
1273 r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, p, &f);
1274 if (r == -ENOENT)
1275 return 0;
1276 if (r < 0)
1277 return r;
1278
1279 for (;;) {
1280 _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL;
1281
1282 /* libvirt / qemu uses threaded mode and cgroup.procs cannot be read at the lower levels.
1283 * From https://docs.kernel.org/admin-guide/cgroup-v2.html#threads, “cgroup.procs” in a
1284 * threaded domain cgroup contains the PIDs of all processes in the subtree and is not
1285 * readable in the subtree proper. */
1286
1287 r = cg_read_pidref(f, &pidref);
1288 if (IN_SET(r, 0, -EOPNOTSUPP))
1289 break;
1290 if (r < 0)
1291 return r;
1292
1293 r = pidref_is_kernel_thread(&pidref);
1294 if (r == -ESRCH) /* gone by now */
1295 continue;
1296 if (r < 0)
1297 log_debug_errno(r, "Failed to determine if " PID_FMT " is a kernel thread, assuming not: %m", pidref.pid);
1298 if (r > 0)
1299 continue;
1300
1301 r = append_process(reply, p, &pidref, pids);
1302 if (r < 0)
1303 return r;
1304 }
1305
1306 r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, p, &d);
1307 if (r == -ENOENT)
1308 return 0;
1309 if (r < 0)
1310 return r;
1311
1312 for (;;) {
1313 _cleanup_free_ char *g = NULL, *j = NULL;
1314
1315 r = cg_read_subgroup(d, &g);
1316 if (r < 0)
1317 return r;
1318 if (r == 0)
1319 break;
1320
1321 j = path_join(empty_to_root(p), g);
1322 if (!j)
1323 return -ENOMEM;
1324
1325 r = append_cgroup(reply, j, pids);
1326 if (r < 0)
1327 return r;
1328 }
1329
1330 return 0;
1331 }
1332
1333 int bus_unit_method_get_processes(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1334 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1335 _cleanup_set_free_ Set *pids = NULL;
1336 Unit *u = userdata;
1337 int r;
1338
1339 assert(message);
1340
1341 r = mac_selinux_unit_access_check(u, message, "status", error);
1342 if (r < 0)
1343 return r;
1344
1345 pids = set_new(NULL);
1346 if (!pids)
1347 return -ENOMEM;
1348
1349 r = sd_bus_message_new_method_return(message, &reply);
1350 if (r < 0)
1351 return r;
1352
1353 r = sd_bus_message_open_container(reply, 'a', "(sus)");
1354 if (r < 0)
1355 return r;
1356
1357 if (u->cgroup_path) {
1358 r = append_cgroup(reply, u->cgroup_path, pids);
1359 if (r < 0)
1360 return r;
1361 }
1362
1363 /* The main and control pids might live outside of the cgroup, hence fetch them separately */
1364 PidRef *pid = unit_main_pid(u);
1365 if (pidref_is_set(pid)) {
1366 r = append_process(reply, NULL, pid, pids);
1367 if (r < 0)
1368 return r;
1369 }
1370
1371 pid = unit_control_pid(u);
1372 if (pidref_is_set(pid)) {
1373 r = append_process(reply, NULL, pid, pids);
1374 if (r < 0)
1375 return r;
1376 }
1377
1378 r = sd_bus_message_close_container(reply);
1379 if (r < 0)
1380 return r;
1381
1382 return sd_bus_send(NULL, reply, NULL);
1383 }
1384
1385 static int property_get_ip_counter(
1386 sd_bus *bus,
1387 const char *path,
1388 const char *interface,
1389 const char *property,
1390 sd_bus_message *reply,
1391 void *userdata,
1392 sd_bus_error *error) {
1393
1394 uint64_t value = UINT64_MAX;
1395 Unit *u = ASSERT_PTR(userdata);
1396 CGroupIPAccountingMetric metric;
1397
1398 assert(bus);
1399 assert(reply);
1400 assert(property);
1401
1402 assert_se((metric = cgroup_ip_accounting_metric_from_string(property)) >= 0);
1403 (void) unit_get_ip_accounting(u, metric, &value);
1404 return sd_bus_message_append(reply, "t", value);
1405 }
1406
1407 static int property_get_io_counter(
1408 sd_bus *bus,
1409 const char *path,
1410 const char *interface,
1411 const char *property,
1412 sd_bus_message *reply,
1413 void *userdata,
1414 sd_bus_error *error) {
1415
1416 uint64_t value = UINT64_MAX;
1417 Unit *u = ASSERT_PTR(userdata);
1418 ssize_t metric;
1419
1420 assert(bus);
1421 assert(reply);
1422 assert(property);
1423
1424 assert_se((metric = cgroup_io_accounting_metric_from_string(property)) >= 0);
1425 (void) unit_get_io_accounting(u, metric, /* allow_cache= */ false, &value);
1426 return sd_bus_message_append(reply, "t", value);
1427 }
1428
1429 int bus_unit_method_attach_processes(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1430 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1431 _cleanup_set_free_ Set *pids = NULL;
1432 Unit *u = userdata;
1433 const char *path;
1434 int r;
1435
1436 assert(message);
1437
1438 /* This migrates the processes with the specified PIDs into the cgroup of this unit, optionally below a
1439 * specified cgroup path. Obviously this only works for units that actually maintain a cgroup
1440 * representation. If a process is already in the cgroup no operation is executed – in this case the specified
1441 * subcgroup path has no effect! */
1442
1443 r = mac_selinux_unit_access_check(u, message, "start", error);
1444 if (r < 0)
1445 return r;
1446
1447 r = sd_bus_message_read(message, "s", &path);
1448 if (r < 0)
1449 return r;
1450
1451 path = empty_to_null(path);
1452 if (path) {
1453 if (!path_is_absolute(path))
1454 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Control group path is not absolute: %s", path);
1455
1456 if (!path_is_normalized(path))
1457 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Control group path is not normalized: %s", path);
1458 }
1459
1460 if (!unit_cgroup_delegate(u))
1461 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Process migration not available on non-delegated units.");
1462
1463 if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)))
1464 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Unit is not active, refusing.");
1465
1466 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
1467 if (r < 0)
1468 return r;
1469
1470 r = sd_bus_message_enter_container(message, 'a', "u");
1471 if (r < 0)
1472 return r;
1473 for (;;) {
1474 _cleanup_(pidref_freep) PidRef *pidref = NULL;
1475 uid_t process_uid, sender_uid;
1476 uint32_t upid;
1477 pid_t pid;
1478
1479 r = sd_bus_message_read(message, "u", &upid);
1480 if (r < 0)
1481 return r;
1482 if (r == 0)
1483 break;
1484
1485 if (upid == 0) {
1486 r = sd_bus_creds_get_pid(creds, &pid);
1487 if (r < 0)
1488 return r;
1489 } else
1490 pid = (uid_t) upid;
1491
1492 r = pidref_new_from_pid(pid, &pidref);
1493 if (r < 0)
1494 return r;
1495
1496 /* Filter out duplicates */
1497 if (set_contains(pids, pidref))
1498 continue;
1499
1500 /* Check if this process is suitable for attaching to this unit */
1501 r = unit_pid_attachable(u, pidref, error);
1502 if (r < 0)
1503 return r;
1504
1505 /* Let's query the sender's UID, so that we can make our security decisions */
1506 r = sd_bus_creds_get_euid(creds, &sender_uid);
1507 if (r < 0)
1508 return r;
1509
1510 /* Let's validate security: if the sender is root, then all is OK. If the sender is any other unit,
1511 * then the process' UID and the target unit's UID have to match the sender's UID */
1512 if (sender_uid != 0 && sender_uid != getuid()) {
1513 r = pidref_get_uid(pidref, &process_uid);
1514 if (r < 0)
1515 return sd_bus_error_set_errnof(error, r, "Failed to retrieve process UID: %m");
1516
1517 if (process_uid != sender_uid)
1518 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Process " PID_FMT " not owned by client's UID. Refusing.", pid);
1519 if (process_uid != u->ref_uid)
1520 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Process " PID_FMT " not owned by target unit's UID. Refusing.", pid);
1521 }
1522
1523 r = set_ensure_consume(&pids, &pidref_hash_ops_free, TAKE_PTR(pidref));
1524 if (r < 0)
1525 return r;
1526 }
1527
1528 r = sd_bus_message_exit_container(message);
1529 if (r < 0)
1530 return r;
1531
1532 r = unit_attach_pids_to_cgroup(u, pids, path);
1533 if (r < 0)
1534 return sd_bus_error_set_errnof(error, r, "Failed to attach processes to control group: %m");
1535
1536 return sd_bus_reply_method_return(message, NULL);
1537 }
1538
1539 const sd_bus_vtable bus_unit_cgroup_vtable[] = {
1540 SD_BUS_VTABLE_START(0),
1541 SD_BUS_PROPERTY("Slice", "s", property_get_slice, 0, 0),
1542 SD_BUS_PROPERTY("ControlGroup", "s", property_get_cgroup, 0, 0),
1543 SD_BUS_PROPERTY("ControlGroupId", "t", NULL, offsetof(Unit, cgroup_id), 0),
1544 SD_BUS_PROPERTY("MemoryCurrent", "t", property_get_current_memory, 0, 0),
1545 SD_BUS_PROPERTY("MemoryPeak", "t", property_get_memory_accounting, 0, 0),
1546 SD_BUS_PROPERTY("MemorySwapCurrent", "t", property_get_memory_accounting, 0, 0),
1547 SD_BUS_PROPERTY("MemorySwapPeak", "t", property_get_memory_accounting, 0, 0),
1548 SD_BUS_PROPERTY("MemoryZSwapCurrent", "t", property_get_memory_accounting, 0, 0),
1549 SD_BUS_PROPERTY("MemoryAvailable", "t", property_get_available_memory, 0, 0),
1550 SD_BUS_PROPERTY("CPUUsageNSec", "t", property_get_cpu_usage, 0, 0),
1551 SD_BUS_PROPERTY("EffectiveCPUs", "ay", property_get_cpuset_cpus, 0, 0),
1552 SD_BUS_PROPERTY("EffectiveMemoryNodes", "ay", property_get_cpuset_mems, 0, 0),
1553 SD_BUS_PROPERTY("TasksCurrent", "t", property_get_current_tasks, 0, 0),
1554 SD_BUS_PROPERTY("IPIngressBytes", "t", property_get_ip_counter, 0, 0),
1555 SD_BUS_PROPERTY("IPIngressPackets", "t", property_get_ip_counter, 0, 0),
1556 SD_BUS_PROPERTY("IPEgressBytes", "t", property_get_ip_counter, 0, 0),
1557 SD_BUS_PROPERTY("IPEgressPackets", "t", property_get_ip_counter, 0, 0),
1558 SD_BUS_PROPERTY("IOReadBytes", "t", property_get_io_counter, 0, 0),
1559 SD_BUS_PROPERTY("IOReadOperations", "t", property_get_io_counter, 0, 0),
1560 SD_BUS_PROPERTY("IOWriteBytes", "t", property_get_io_counter, 0, 0),
1561 SD_BUS_PROPERTY("IOWriteOperations", "t", property_get_io_counter, 0, 0),
1562
1563 SD_BUS_METHOD_WITH_ARGS("GetProcesses",
1564 SD_BUS_NO_ARGS,
1565 SD_BUS_ARGS("a(sus)", processes),
1566 bus_unit_method_get_processes,
1567 SD_BUS_VTABLE_UNPRIVILEGED),
1568
1569 SD_BUS_METHOD_WITH_ARGS("AttachProcesses",
1570 SD_BUS_ARGS("s", subcgroup, "au", pids),
1571 SD_BUS_NO_RESULT,
1572 bus_unit_method_attach_processes,
1573 SD_BUS_VTABLE_UNPRIVILEGED),
1574
1575 SD_BUS_VTABLE_END
1576 };
1577
1578 static int send_new_signal(sd_bus *bus, void *userdata) {
1579 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1580 _cleanup_free_ char *p = NULL;
1581 Unit *u = ASSERT_PTR(userdata);
1582 int r;
1583
1584 assert(bus);
1585
1586 p = unit_dbus_path(u);
1587 if (!p)
1588 return -ENOMEM;
1589
1590 r = sd_bus_message_new_signal(
1591 bus,
1592 &m,
1593 "/org/freedesktop/systemd1",
1594 "org.freedesktop.systemd1.Manager",
1595 "UnitNew");
1596 if (r < 0)
1597 return r;
1598
1599 r = sd_bus_message_append(m, "so", u->id, p);
1600 if (r < 0)
1601 return r;
1602
1603 return sd_bus_send(bus, m, NULL);
1604 }
1605
1606 static int send_changed_signal(sd_bus *bus, void *userdata) {
1607 _cleanup_free_ char *p = NULL;
1608 Unit *u = ASSERT_PTR(userdata);
1609 int r;
1610
1611 assert(bus);
1612
1613 p = unit_dbus_path(u);
1614 if (!p)
1615 return -ENOMEM;
1616
1617 /* Send a properties changed signal. First for the specific
1618 * type, then for the generic unit. The clients may rely on
1619 * this order to get atomic behavior if needed. */
1620
1621 r = sd_bus_emit_properties_changed_strv(
1622 bus, p,
1623 unit_dbus_interface_from_type(u->type),
1624 NULL);
1625 if (r < 0)
1626 return r;
1627
1628 return sd_bus_emit_properties_changed_strv(
1629 bus, p,
1630 "org.freedesktop.systemd1.Unit",
1631 NULL);
1632 }
1633
1634 void bus_unit_send_change_signal(Unit *u) {
1635 int r;
1636 assert(u);
1637
1638 if (u->in_dbus_queue) {
1639 LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u);
1640 u->in_dbus_queue = false;
1641
1642 /* The unit might be good to be GC once its pending signals have been sent */
1643 unit_add_to_gc_queue(u);
1644 }
1645
1646 if (!u->id)
1647 return;
1648
1649 r = bus_foreach_bus(u->manager, u->bus_track, u->sent_dbus_new_signal ? send_changed_signal : send_new_signal, u);
1650 if (r < 0)
1651 log_unit_debug_errno(u, r, "Failed to send unit change signal for %s: %m", u->id);
1652
1653 u->sent_dbus_new_signal = true;
1654 }
1655
1656 void bus_unit_send_pending_change_signal(Unit *u, bool including_new) {
1657
1658 /* Sends out any pending change signals, but only if they really are pending. This call is used when we are
1659 * about to change state in order to force out a PropertiesChanged signal beforehand if there was one pending
1660 * so that clients can follow the full state transition */
1661
1662 if (!u->in_dbus_queue) /* If not enqueued, don't bother */
1663 return;
1664
1665 if (!u->sent_dbus_new_signal && !including_new) /* If the unit was never announced, don't bother, it's fine if
1666 * the unit appears in the new state right-away (except if the
1667 * caller explicitly asked us to send it anyway) */
1668 return;
1669
1670 if (MANAGER_IS_RELOADING(u->manager)) /* Don't generate unnecessary PropertiesChanged signals for the same unit
1671 * when we are reloading. */
1672 return;
1673
1674 bus_unit_send_change_signal(u);
1675 }
1676
1677 int bus_unit_send_pending_freezer_message(Unit *u, bool cancelled) {
1678 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1679 int r;
1680
1681 assert(u);
1682
1683 if (!u->pending_freezer_invocation)
1684 return 0;
1685
1686 if (cancelled)
1687 r = sd_bus_message_new_method_error(
1688 u->pending_freezer_invocation,
1689 &reply,
1690 &SD_BUS_ERROR_MAKE_CONST(
1691 BUS_ERROR_FREEZE_CANCELLED, "Freeze operation aborted"));
1692 else
1693 r = sd_bus_message_new_method_return(u->pending_freezer_invocation, &reply);
1694 if (r < 0)
1695 return r;
1696
1697 r = sd_bus_send(NULL, reply, NULL);
1698 if (r < 0)
1699 log_warning_errno(r, "Failed to send queued message, ignoring: %m");
1700
1701 u->pending_freezer_invocation = sd_bus_message_unref(u->pending_freezer_invocation);
1702
1703 return 0;
1704 }
1705
1706 static int send_removed_signal(sd_bus *bus, void *userdata) {
1707 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1708 _cleanup_free_ char *p = NULL;
1709 Unit *u = ASSERT_PTR(userdata);
1710 int r;
1711
1712 assert(bus);
1713
1714 p = unit_dbus_path(u);
1715 if (!p)
1716 return -ENOMEM;
1717
1718 r = sd_bus_message_new_signal(
1719 bus,
1720 &m,
1721 "/org/freedesktop/systemd1",
1722 "org.freedesktop.systemd1.Manager",
1723 "UnitRemoved");
1724 if (r < 0)
1725 return r;
1726
1727 r = sd_bus_message_append(m, "so", u->id, p);
1728 if (r < 0)
1729 return r;
1730
1731 return sd_bus_send(bus, m, NULL);
1732 }
1733
1734 void bus_unit_send_removed_signal(Unit *u) {
1735 int r;
1736 assert(u);
1737
1738 if (!u->sent_dbus_new_signal || u->in_dbus_queue)
1739 bus_unit_send_change_signal(u);
1740
1741 if (!u->id)
1742 return;
1743
1744 r = bus_foreach_bus(u->manager, u->bus_track, send_removed_signal, u);
1745 if (r < 0)
1746 log_unit_debug_errno(u, r, "Failed to send unit remove signal for %s: %m", u->id);
1747 }
1748
1749 int bus_unit_queue_job_one(
1750 sd_bus_message *message,
1751 Unit *u,
1752 JobType type,
1753 JobMode mode,
1754 BusUnitQueueFlags flags,
1755 sd_bus_message *reply,
1756 sd_bus_error *error) {
1757
1758 _cleanup_set_free_ Set *affected = NULL;
1759 _cleanup_free_ char *job_path = NULL, *unit_path = NULL;
1760 Job *j, *a;
1761 int r;
1762
1763 if (FLAGS_SET(flags, BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE) && unit_can_reload(u)) {
1764 if (type == JOB_RESTART)
1765 type = JOB_RELOAD_OR_START;
1766 else if (type == JOB_TRY_RESTART)
1767 type = JOB_TRY_RELOAD;
1768 }
1769
1770 if (type == JOB_STOP &&
1771 IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_ERROR, UNIT_BAD_SETTING) &&
1772 unit_active_state(u) == UNIT_INACTIVE)
1773 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not loaded.", u->id);
1774
1775 if ((type == JOB_START && u->refuse_manual_start) ||
1776 (type == JOB_STOP && u->refuse_manual_stop) ||
1777 (IN_SET(type, JOB_RESTART, JOB_TRY_RESTART) && (u->refuse_manual_start || u->refuse_manual_stop)) ||
1778 (type == JOB_RELOAD_OR_START && job_type_collapse(type, u) == JOB_START && u->refuse_manual_start))
1779 return sd_bus_error_setf(error,
1780 BUS_ERROR_ONLY_BY_DEPENDENCY,
1781 "Operation refused, unit %s may be requested by dependency only (it is configured to refuse manual start/stop).",
1782 u->id);
1783
1784 /* dbus-broker issues StartUnit for activation requests, and Type=dbus services automatically
1785 * gain dependency on dbus.socket. Therefore, if dbus has a pending stop job, the new start
1786 * job that pulls in dbus again would cause job type conflict. Let's avoid that by rejecting
1787 * job enqueuing early.
1788 *
1789 * Note that unlike signal_activation_request(), we can't use unit_inactive_or_pending()
1790 * here. StartUnit is a more generic interface, and thus users are allowed to use e.g. systemctl
1791 * to start Type=dbus services even when dbus is inactive. */
1792 if (type == JOB_START && u->type == UNIT_SERVICE && SERVICE(u)->type == SERVICE_DBUS)
1793 FOREACH_STRING(dbus_unit, SPECIAL_DBUS_SOCKET, SPECIAL_DBUS_SERVICE) {
1794 Unit *dbus;
1795
1796 dbus = manager_get_unit(u->manager, dbus_unit);
1797 if (dbus && unit_stop_pending(dbus))
1798 return sd_bus_error_setf(error,
1799 BUS_ERROR_SHUTTING_DOWN,
1800 "Operation for unit %s refused, D-Bus is shutting down.",
1801 u->id);
1802 }
1803
1804 if (FLAGS_SET(flags, BUS_UNIT_QUEUE_VERBOSE_REPLY)) {
1805 affected = set_new(NULL);
1806 if (!affected)
1807 return -ENOMEM;
1808 }
1809
1810 r = manager_add_job(u->manager, type, u, mode, affected, error, &j);
1811 if (r < 0)
1812 return r;
1813
1814 r = bus_job_track_sender(j, message);
1815 if (r < 0)
1816 return r;
1817
1818 /* Before we send the method reply, force out the announcement JobNew for this job */
1819 bus_job_send_pending_change_signal(j, true);
1820
1821 job_path = job_dbus_path(j);
1822 if (!job_path)
1823 return -ENOMEM;
1824
1825 /* The classic response is just a job object path */
1826 if (!FLAGS_SET(flags, BUS_UNIT_QUEUE_VERBOSE_REPLY))
1827 return sd_bus_message_append(reply, "o", job_path);
1828
1829 /* In verbose mode respond with the anchor job plus everything that has been affected */
1830
1831 unit_path = unit_dbus_path(j->unit);
1832 if (!unit_path)
1833 return -ENOMEM;
1834
1835 r = sd_bus_message_append(reply, "uosos",
1836 j->id, job_path,
1837 j->unit->id, unit_path,
1838 job_type_to_string(j->type));
1839 if (r < 0)
1840 return r;
1841
1842 r = sd_bus_message_open_container(reply, 'a', "(uosos)");
1843 if (r < 0)
1844 return r;
1845
1846 SET_FOREACH(a, affected) {
1847 if (a->id == j->id)
1848 continue;
1849
1850 /* Free paths from previous iteration */
1851 job_path = mfree(job_path);
1852 unit_path = mfree(unit_path);
1853
1854 job_path = job_dbus_path(a);
1855 if (!job_path)
1856 return -ENOMEM;
1857
1858 unit_path = unit_dbus_path(a->unit);
1859 if (!unit_path)
1860 return -ENOMEM;
1861
1862 r = sd_bus_message_append(reply, "(uosos)",
1863 a->id, job_path,
1864 a->unit->id, unit_path,
1865 job_type_to_string(a->type));
1866 if (r < 0)
1867 return r;
1868 }
1869
1870 return sd_bus_message_close_container(reply);
1871 }
1872
1873 int bus_unit_queue_job(
1874 sd_bus_message *message,
1875 Unit *u,
1876 JobType type,
1877 JobMode mode,
1878 BusUnitQueueFlags flags,
1879 sd_bus_error *error) {
1880
1881 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1882 int r;
1883
1884 assert(message);
1885 assert(u);
1886 assert(type >= 0 && type < _JOB_TYPE_MAX);
1887 assert(mode >= 0 && mode < _JOB_MODE_MAX);
1888
1889 r = mac_selinux_unit_access_check(
1890 u, message,
1891 job_type_to_access_method(type),
1892 error);
1893 if (r < 0)
1894 return r;
1895
1896 r = sd_bus_message_new_method_return(message, &reply);
1897 if (r < 0)
1898 return r;
1899
1900 r = bus_unit_queue_job_one(message, u, type, mode, flags, reply, error);
1901 if (r < 0)
1902 return r;
1903
1904 return sd_bus_send(NULL, reply, NULL);
1905 }
1906
1907 static int bus_unit_set_live_property(
1908 Unit *u,
1909 const char *name,
1910 sd_bus_message *message,
1911 UnitWriteFlags flags,
1912 sd_bus_error *error) {
1913
1914 int r;
1915
1916 assert(u);
1917 assert(name);
1918 assert(message);
1919
1920 /* Handles setting properties both "live" (i.e. at any time during runtime), and during creation (for
1921 * transient units that are being created). */
1922
1923 if (streq(name, "Description")) {
1924 const char *d;
1925
1926 r = sd_bus_message_read(message, "s", &d);
1927 if (r < 0)
1928 return r;
1929
1930 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
1931 r = unit_set_description(u, d);
1932 if (r < 0)
1933 return r;
1934
1935 unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "Description=%s", d);
1936 }
1937
1938 return 1;
1939 }
1940
1941 /* A setting that only applies to active units. We don't actually write this to /run, this state is
1942 * managed internally. "+foo" sets flag foo, "-foo" unsets flag foo, just "foo" resets flags to
1943 * foo. The last type cannot be mixed with "+" or "-". */
1944
1945 if (streq(name, "Markers")) {
1946 unsigned settings = 0, mask = 0;
1947 bool some_plus_minus = false, some_absolute = false;
1948
1949 r = sd_bus_message_enter_container(message, 'a', "s");
1950 if (r < 0)
1951 return r;
1952
1953 for (;;) {
1954 const char *word;
1955 bool b;
1956
1957 r = sd_bus_message_read(message, "s", &word);
1958 if (r < 0)
1959 return r;
1960 if (r == 0)
1961 break;
1962
1963 if (IN_SET(word[0], '+', '-')) {
1964 b = word[0] == '+';
1965 word++;
1966 some_plus_minus = true;
1967 } else {
1968 b = true;
1969 some_absolute = true;
1970 }
1971
1972 UnitMarker m = unit_marker_from_string(word);
1973 if (m < 0)
1974 return sd_bus_error_setf(error, BUS_ERROR_BAD_UNIT_SETTING,
1975 "Unknown marker \"%s\".", word);
1976
1977 SET_FLAG(settings, 1u << m, b);
1978 SET_FLAG(mask, 1u << m, true);
1979 }
1980
1981 r = sd_bus_message_exit_container(message);
1982 if (r < 0)
1983 return r;
1984
1985 if (some_plus_minus && some_absolute)
1986 return sd_bus_error_set(error, BUS_ERROR_BAD_UNIT_SETTING, "Bad marker syntax.");
1987
1988 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
1989 if (some_absolute)
1990 u->markers = settings;
1991 else
1992 u->markers = settings | (u->markers & ~mask);
1993 }
1994
1995 return 1;
1996 }
1997
1998 return 0;
1999 }
2000
2001 static int bus_set_transient_emergency_action(
2002 Unit *u,
2003 const char *name,
2004 EmergencyAction *p,
2005 sd_bus_message *message,
2006 UnitWriteFlags flags,
2007 sd_bus_error *error) {
2008
2009 const char *s;
2010 EmergencyAction v;
2011 int r;
2012
2013 assert(p);
2014
2015 r = sd_bus_message_read(message, "s", &s);
2016 if (r < 0)
2017 return r;
2018
2019 r = parse_emergency_action(s, u->manager->runtime_scope, &v);
2020 if (r < 0)
2021 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
2022 r == -EOPNOTSUPP ? "%s setting invalid for manager type: %s"
2023 : "Invalid %s setting: %s",
2024 name, s);
2025
2026 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2027 *p = v;
2028 unit_write_settingf(u, flags, name,
2029 "%s=%s", name, s);
2030 }
2031
2032 return 1;
2033 }
2034
2035 static int bus_set_transient_exit_status(
2036 Unit *u,
2037 const char *name,
2038 int *p,
2039 sd_bus_message *message,
2040 UnitWriteFlags flags,
2041 sd_bus_error *error) {
2042
2043 int32_t k;
2044 int r;
2045
2046 assert(p);
2047
2048 r = sd_bus_message_read(message, "i", &k);
2049 if (r < 0)
2050 return r;
2051
2052 if (k > 255)
2053 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Exit status must be in range 0…255 or negative.");
2054
2055 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2056 *p = k < 0 ? -1 : k;
2057
2058 if (k < 0)
2059 unit_write_settingf(u, flags, name, "%s=", name);
2060 else
2061 unit_write_settingf(u, flags, name, "%s=%i", name, k);
2062 }
2063
2064 return 1;
2065 }
2066
2067 static BUS_DEFINE_SET_TRANSIENT_PARSE(collect_mode, CollectMode, collect_mode_from_string);
2068 static BUS_DEFINE_SET_TRANSIENT_PARSE(job_mode, JobMode, job_mode_from_string);
2069
2070 static int bus_set_transient_conditions(
2071 Unit *u,
2072 const char *name,
2073 Condition **list,
2074 bool is_condition,
2075 sd_bus_message *message,
2076 UnitWriteFlags flags,
2077 sd_bus_error *error) {
2078
2079 const char *type_name, *param;
2080 int trigger, negate, r;
2081 bool empty = true;
2082
2083 assert(list);
2084
2085 r = sd_bus_message_enter_container(message, 'a', "(sbbs)");
2086 if (r < 0)
2087 return r;
2088
2089 while ((r = sd_bus_message_read(message, "(sbbs)", &type_name, &trigger, &negate, &param)) > 0) {
2090 ConditionType t;
2091
2092 t = is_condition ? condition_type_from_string(type_name) : assert_type_from_string(type_name);
2093 if (t < 0)
2094 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid condition type: %s", type_name);
2095
2096 if (isempty(param))
2097 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Condition parameter in %s is empty", type_name);
2098
2099 if (condition_takes_path(t) && !path_is_absolute(param))
2100 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path in condition %s is not absolute: %s", type_name, param);
2101
2102 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2103 Condition *c;
2104
2105 c = condition_new(t, param, trigger, negate);
2106 if (!c)
2107 return -ENOMEM;
2108
2109 LIST_PREPEND(conditions, *list, c);
2110
2111 unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name,
2112 "%s=%s%s%s", type_name,
2113 trigger ? "|" : "", negate ? "!" : "", param);
2114 }
2115
2116 empty = false;
2117 }
2118 if (r < 0)
2119 return r;
2120
2121 r = sd_bus_message_exit_container(message);
2122 if (r < 0)
2123 return r;
2124
2125 if (!UNIT_WRITE_FLAGS_NOOP(flags) && empty) {
2126 *list = condition_free_list(*list);
2127 unit_write_settingf(u, flags, name, "%sNull=", is_condition ? "Condition" : "Assert");
2128 }
2129
2130 return 1;
2131 }
2132
2133 static int bus_unit_set_transient_property(
2134 Unit *u,
2135 const char *name,
2136 sd_bus_message *message,
2137 UnitWriteFlags flags,
2138 sd_bus_error *error) {
2139
2140 UnitDependency d;
2141 int r;
2142
2143 assert(u);
2144 assert(name);
2145 assert(message);
2146
2147 /* Handles settings when transient units are created. This settings cannot be altered anymore after
2148 * the unit has been created. */
2149
2150 if (streq(name, "SourcePath"))
2151 return bus_set_transient_path(u, name, &u->source_path, message, flags, error);
2152
2153 if (streq(name, "StopWhenUnneeded"))
2154 return bus_set_transient_bool(u, name, &u->stop_when_unneeded, message, flags, error);
2155
2156 if (streq(name, "RefuseManualStart"))
2157 return bus_set_transient_bool(u, name, &u->refuse_manual_start, message, flags, error);
2158
2159 if (streq(name, "RefuseManualStop"))
2160 return bus_set_transient_bool(u, name, &u->refuse_manual_stop, message, flags, error);
2161
2162 if (streq(name, "AllowIsolate"))
2163 return bus_set_transient_bool(u, name, &u->allow_isolate, message, flags, error);
2164
2165 if (streq(name, "DefaultDependencies"))
2166 return bus_set_transient_bool(u, name, &u->default_dependencies, message, flags, error);
2167
2168 if (streq(name, "SurviveFinalKillSignal"))
2169 return bus_set_transient_bool(u, name, &u->survive_final_kill_signal, message, flags, error);
2170
2171 if (streq(name, "OnSuccessJobMode"))
2172 return bus_set_transient_job_mode(u, name, &u->on_success_job_mode, message, flags, error);
2173
2174 if (streq(name, "OnFailureJobMode"))
2175 return bus_set_transient_job_mode(u, name, &u->on_failure_job_mode, message, flags, error);
2176
2177 if (streq(name, "IgnoreOnIsolate"))
2178 return bus_set_transient_bool(u, name, &u->ignore_on_isolate, message, flags, error);
2179
2180 if (streq(name, "JobTimeoutUSec")) {
2181 r = bus_set_transient_usec_fix_0(u, name, &u->job_timeout, message, flags, error);
2182 if (r >= 0 && !UNIT_WRITE_FLAGS_NOOP(flags) && !u->job_running_timeout_set)
2183 u->job_running_timeout = u->job_timeout;
2184 }
2185
2186 if (streq(name, "JobRunningTimeoutUSec")) {
2187 r = bus_set_transient_usec_fix_0(u, name, &u->job_running_timeout, message, flags, error);
2188 if (r >= 0 && !UNIT_WRITE_FLAGS_NOOP(flags))
2189 u->job_running_timeout_set = true;
2190
2191 return r;
2192 }
2193
2194 if (streq(name, "JobTimeoutAction"))
2195 return bus_set_transient_emergency_action(u, name, &u->job_timeout_action, message, flags, error);
2196
2197 if (streq(name, "JobTimeoutRebootArgument"))
2198 return bus_set_transient_string(u, name, &u->job_timeout_reboot_arg, message, flags, error);
2199
2200 if (streq(name, "StartLimitIntervalUSec"))
2201 return bus_set_transient_usec(u, name, &u->start_ratelimit.interval, message, flags, error);
2202
2203 if (streq(name, "StartLimitBurst"))
2204 return bus_set_transient_unsigned(u, name, &u->start_ratelimit.burst, message, flags, error);
2205
2206 if (streq(name, "StartLimitAction"))
2207 return bus_set_transient_emergency_action(u, name, &u->start_limit_action, message, flags, error);
2208
2209 if (streq(name, "FailureAction"))
2210 return bus_set_transient_emergency_action(u, name, &u->failure_action, message, flags, error);
2211
2212 if (streq(name, "SuccessAction"))
2213 return bus_set_transient_emergency_action(u, name, &u->success_action, message, flags, error);
2214
2215 if (streq(name, "FailureActionExitStatus"))
2216 return bus_set_transient_exit_status(u, name, &u->failure_action_exit_status, message, flags, error);
2217
2218 if (streq(name, "SuccessActionExitStatus"))
2219 return bus_set_transient_exit_status(u, name, &u->success_action_exit_status, message, flags, error);
2220
2221 if (streq(name, "RebootArgument"))
2222 return bus_set_transient_string(u, name, &u->reboot_arg, message, flags, error);
2223
2224 if (streq(name, "CollectMode"))
2225 return bus_set_transient_collect_mode(u, name, &u->collect_mode, message, flags, error);
2226
2227 if (streq(name, "Conditions"))
2228 return bus_set_transient_conditions(u, name, &u->conditions, true, message, flags, error);
2229
2230 if (streq(name, "Asserts"))
2231 return bus_set_transient_conditions(u, name, &u->asserts, false, message, flags, error);
2232
2233 if (streq(name, "Documentation")) {
2234 _cleanup_strv_free_ char **l = NULL;
2235
2236 r = sd_bus_message_read_strv(message, &l);
2237 if (r < 0)
2238 return r;
2239
2240 STRV_FOREACH(p, l)
2241 if (!documentation_url_is_valid(*p))
2242 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid URL in %s: %s", name, *p);
2243
2244 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2245 if (strv_isempty(l)) {
2246 u->documentation = strv_free(u->documentation);
2247 unit_write_settingf(u, flags, name, "%s=", name);
2248 } else {
2249 strv_extend_strv(&u->documentation, l, false);
2250
2251 STRV_FOREACH(p, l)
2252 unit_write_settingf(u, flags, name, "%s=%s", name, *p);
2253 }
2254 }
2255
2256 return 1;
2257
2258 } else if (streq(name, "Slice")) {
2259 Unit *slice;
2260 const char *s;
2261
2262 if (!UNIT_HAS_CGROUP_CONTEXT(u))
2263 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "The slice property is only available for units with control groups.");
2264 if (u->type == UNIT_SLICE)
2265 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Slice may not be set for slice units.");
2266 if (unit_has_name(u, SPECIAL_INIT_SCOPE))
2267 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot set slice for init.scope");
2268
2269 r = sd_bus_message_read(message, "s", &s);
2270 if (r < 0)
2271 return r;
2272
2273 if (!unit_name_is_valid(s, UNIT_NAME_PLAIN))
2274 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name '%s'", s);
2275
2276 /* Note that we do not dispatch the load queue here yet, as we don't want our own transient unit to be
2277 * loaded while we are still setting it up. Or in other words, we use manager_load_unit_prepare()
2278 * instead of manager_load_unit() on purpose, here. */
2279 r = manager_load_unit_prepare(u->manager, s, NULL, error, &slice);
2280 if (r < 0)
2281 return r;
2282
2283 if (slice->type != UNIT_SLICE)
2284 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unit name '%s' is not a slice", s);
2285
2286 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2287 r = unit_set_slice(u, slice);
2288 if (r < 0)
2289 return r;
2290
2291 unit_write_settingf(u, flags|UNIT_PRIVATE, name, "Slice=%s", s);
2292 }
2293
2294 return 1;
2295
2296 } else if (STR_IN_SET(name, "RequiresMountsFor", "WantsMountsFor")) {
2297 _cleanup_strv_free_ char **l = NULL;
2298
2299 r = sd_bus_message_read_strv(message, &l);
2300 if (r < 0)
2301 return r;
2302
2303 STRV_FOREACH(p, l) {
2304 path_simplify(*p);
2305
2306 if (!path_is_absolute(*p))
2307 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path specified in %s is not absolute: %s", name, *p);
2308
2309 if (!path_is_valid(*p))
2310 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path specified in %s has invalid length: %s", name, *p);
2311
2312 if (!path_is_normalized(*p))
2313 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path specified in %s is not normalized: %s", name, *p);
2314
2315 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2316 r = unit_add_mounts_for(u, *p, UNIT_DEPENDENCY_FILE, unit_mount_dependency_type_from_string(name));
2317 if (r < 0)
2318 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Failed to add requested mount \"%s\": %m", *p);
2319
2320 unit_write_settingf(u, flags, name, "%s=%s", name, *p);
2321 }
2322 }
2323
2324 return 1;
2325 }
2326
2327 if (streq(name, "RequiresOverridable"))
2328 d = UNIT_REQUIRES; /* redirect for obsolete unit dependency type */
2329 else if (streq(name, "RequisiteOverridable"))
2330 d = UNIT_REQUISITE; /* same here */
2331 else
2332 d = unit_dependency_from_string(name);
2333
2334 if (d >= 0) {
2335 const char *other;
2336
2337 if (!IN_SET(d,
2338 UNIT_REQUIRES,
2339 UNIT_REQUISITE,
2340 UNIT_WANTS,
2341 UNIT_BINDS_TO,
2342 UNIT_PART_OF,
2343 UNIT_UPHOLDS,
2344 UNIT_CONFLICTS,
2345 UNIT_BEFORE,
2346 UNIT_AFTER,
2347 UNIT_ON_SUCCESS,
2348 UNIT_ON_FAILURE,
2349 UNIT_PROPAGATES_RELOAD_TO,
2350 UNIT_RELOAD_PROPAGATED_FROM,
2351 UNIT_PROPAGATES_STOP_TO,
2352 UNIT_STOP_PROPAGATED_FROM,
2353 UNIT_JOINS_NAMESPACE_OF))
2354 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Dependency type %s may not be created transiently.", unit_dependency_to_string(d));
2355
2356 r = sd_bus_message_enter_container(message, 'a', "s");
2357 if (r < 0)
2358 return r;
2359
2360 while ((r = sd_bus_message_read(message, "s", &other)) > 0) {
2361 if (!unit_name_is_valid(other, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE))
2362 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name %s", other);
2363
2364 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2365 _cleanup_free_ char *label = NULL;
2366
2367 r = unit_add_dependency_by_name(u, d, other, true, UNIT_DEPENDENCY_FILE);
2368 if (r < 0)
2369 return r;
2370
2371 label = strjoin(name, "-", other);
2372 if (!label)
2373 return -ENOMEM;
2374
2375 unit_write_settingf(u, flags, label, "%s=%s", unit_dependency_to_string(d), other);
2376 }
2377
2378 }
2379 if (r < 0)
2380 return r;
2381
2382 r = sd_bus_message_exit_container(message);
2383 if (r < 0)
2384 return r;
2385
2386 return 1;
2387
2388 } else if (streq(name, "AddRef")) {
2389
2390 int b;
2391
2392 /* Why is this called "AddRef" rather than just "Ref", or "Reference"? There's already a "Ref()" method
2393 * on the Unit interface, and it's probably not a good idea to expose a property and a method on the
2394 * same interface (well, strictly speaking AddRef isn't exposed as full property, we just read it for
2395 * transient units, but still). And "References" and "ReferencedBy" is already used as unit reference
2396 * dependency type, hence let's not confuse things with that.
2397 *
2398 * Note that we don't actually add the reference to the bus track. We do that only after the setup of
2399 * the transient unit is complete, so that setting this property multiple times in the same transient
2400 * unit creation call doesn't count as individual references. */
2401
2402 r = sd_bus_message_read(message, "b", &b);
2403 if (r < 0)
2404 return r;
2405
2406 if (!UNIT_WRITE_FLAGS_NOOP(flags))
2407 u->bus_track_add = b;
2408
2409 return 1;
2410 }
2411
2412 return 0;
2413 }
2414
2415 int bus_unit_set_properties(
2416 Unit *u,
2417 sd_bus_message *message,
2418 UnitWriteFlags flags,
2419 bool commit,
2420 sd_bus_error *error) {
2421
2422 bool for_real = false;
2423 unsigned n = 0;
2424 int r;
2425
2426 assert(u);
2427 assert(message);
2428
2429 /* We iterate through the array twice. First run just checks if all passed data is valid, second run
2430 * actually applies it. This implements transaction-like behaviour without actually providing full
2431 * transactions. */
2432
2433 r = sd_bus_message_enter_container(message, 'a', "(sv)");
2434 if (r < 0)
2435 goto error;
2436
2437 for (;;) {
2438 const char *name;
2439 UnitWriteFlags f;
2440
2441 r = sd_bus_message_enter_container(message, 'r', "sv");
2442 if (r < 0)
2443 goto error;
2444 if (r == 0) {
2445 if (for_real || UNIT_WRITE_FLAGS_NOOP(flags))
2446 break;
2447
2448 /* Reached EOF. Let's try again, and this time for realz... */
2449 r = sd_bus_message_rewind(message, false);
2450 if (r < 0)
2451 goto error;
2452
2453 for_real = true;
2454 continue;
2455 }
2456
2457 r = sd_bus_message_read(message, "s", &name);
2458 if (r < 0)
2459 goto error;
2460
2461 r = sd_bus_message_enter_container(message, 'v', NULL);
2462 if (r < 0)
2463 goto error;
2464
2465 /* If not for real, then mask out the two target flags */
2466 f = for_real ? flags : (flags & ~(UNIT_RUNTIME|UNIT_PERSISTENT));
2467
2468 if (UNIT_VTABLE(u)->bus_set_property)
2469 r = UNIT_VTABLE(u)->bus_set_property(u, name, message, f, error);
2470 else
2471 r = 0;
2472 if (r == 0 && u->transient && u->load_state == UNIT_STUB)
2473 r = bus_unit_set_transient_property(u, name, message, f, error);
2474 if (r == 0)
2475 r = bus_unit_set_live_property(u, name, message, f, error);
2476 if (r < 0)
2477 goto error;
2478
2479 if (r == 0)
2480 return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY,
2481 "Cannot set property %s, or unknown property.", name);
2482
2483 r = sd_bus_message_exit_container(message);
2484 if (r < 0)
2485 goto error;
2486
2487 r = sd_bus_message_exit_container(message);
2488 if (r < 0)
2489 goto error;
2490
2491 n += for_real;
2492 }
2493
2494 r = sd_bus_message_exit_container(message);
2495 if (r < 0)
2496 goto error;
2497
2498 if (commit && n > 0 && UNIT_VTABLE(u)->bus_commit_properties)
2499 UNIT_VTABLE(u)->bus_commit_properties(u);
2500
2501 return n;
2502
2503 error:
2504 /* Pretty much any of the calls above can fail if the message is not formed properly
2505 * or if it has unexpected contents. Fill in a more informative error message here. */
2506 if (sd_bus_error_is_set(error))
2507 return r;
2508 return sd_bus_error_set_errnof(error, r,
2509 r == -ENXIO ? "Failed to set unit properties: Unexpected message contents"
2510 : "Failed to set unit properties: %m");
2511 }
2512
2513 int bus_unit_validate_load_state(Unit *u, sd_bus_error *error) {
2514 assert(u);
2515
2516 /* Generates a pretty error if a unit isn't properly loaded. */
2517
2518 switch (u->load_state) {
2519
2520 case UNIT_LOADED:
2521 return 0;
2522
2523 case UNIT_NOT_FOUND:
2524 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not found.", u->id);
2525
2526 case UNIT_BAD_SETTING:
2527 return sd_bus_error_setf(error, BUS_ERROR_BAD_UNIT_SETTING, "Unit %s has a bad unit file setting.", u->id);
2528
2529 case UNIT_ERROR: /* Only show .load_error in UNIT_ERROR state */
2530 return sd_bus_error_set_errnof(error, u->load_error,
2531 "Unit %s failed to load properly, please adjust/correct and reload service manager: %m", u->id);
2532
2533 case UNIT_MASKED:
2534 return sd_bus_error_setf(error, BUS_ERROR_UNIT_MASKED, "Unit %s is masked.", u->id);
2535
2536 case UNIT_STUB:
2537 case UNIT_MERGED:
2538 default:
2539 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unexpected load state of unit %s", u->id);
2540 }
2541 }
2542
2543 static int bus_unit_track_handler(sd_bus_track *t, void *userdata) {
2544 Unit *u = ASSERT_PTR(userdata);
2545
2546 assert(t);
2547
2548 u->bus_track = sd_bus_track_unref(u->bus_track); /* make sure we aren't called again */
2549
2550 /* If the client that tracks us disappeared, then there's reason to believe that the cgroup is empty now too,
2551 * let's see */
2552 unit_add_to_cgroup_empty_queue(u);
2553
2554 /* Also add the unit to the GC queue, after all if the client left it might be time to GC this unit */
2555 unit_add_to_gc_queue(u);
2556
2557 return 0;
2558 }
2559
2560 static int bus_unit_allocate_bus_track(Unit *u) {
2561 int r;
2562
2563 assert(u);
2564
2565 if (u->bus_track)
2566 return 0;
2567
2568 r = sd_bus_track_new(u->manager->api_bus, &u->bus_track, bus_unit_track_handler, u);
2569 if (r < 0)
2570 return r;
2571
2572 r = sd_bus_track_set_recursive(u->bus_track, true);
2573 if (r < 0) {
2574 u->bus_track = sd_bus_track_unref(u->bus_track);
2575 return r;
2576 }
2577
2578 return 0;
2579 }
2580
2581 int bus_unit_track_add_name(Unit *u, const char *name) {
2582 int r;
2583
2584 assert(u);
2585
2586 r = bus_unit_allocate_bus_track(u);
2587 if (r < 0)
2588 return r;
2589
2590 return sd_bus_track_add_name(u->bus_track, name);
2591 }
2592
2593 int bus_unit_track_add_sender(Unit *u, sd_bus_message *m) {
2594 int r;
2595
2596 assert(u);
2597
2598 r = bus_unit_allocate_bus_track(u);
2599 if (r < 0)
2600 return r;
2601
2602 return sd_bus_track_add_sender(u->bus_track, m);
2603 }
2604
2605 int bus_unit_track_remove_sender(Unit *u, sd_bus_message *m) {
2606 assert(u);
2607
2608 /* If we haven't allocated the bus track object yet, then there's definitely no reference taken yet,
2609 * return an error */
2610 if (!u->bus_track)
2611 return -EUNATCH;
2612
2613 return sd_bus_track_remove_sender(u->bus_track, m);
2614 }
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