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Merge pull request #22791 from keszybz/bootctl-invert-order
[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 "signal-util.h"
25 #include "special.h"
26 #include "string-table.h"
27 #include "string-util.h"
28 #include "strv.h"
29 #include "user-util.h"
30 #include "web-util.h"
31
32 static bool unit_can_start_refuse_manual(Unit *u) {
33 return unit_can_start(u) && !u->refuse_manual_start;
34 }
35
36 static bool unit_can_stop_refuse_manual(Unit *u) {
37 return unit_can_stop(u) && !u->refuse_manual_stop;
38 }
39
40 static bool unit_can_isolate_refuse_manual(Unit *u) {
41 return unit_can_isolate(u) && !u->refuse_manual_start;
42 }
43
44 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_collect_mode, collect_mode, CollectMode);
45 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_load_state, unit_load_state, UnitLoadState);
46 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_job_mode, job_mode, JobMode);
47 static BUS_DEFINE_PROPERTY_GET(property_get_description, "s", Unit, unit_description);
48 static BUS_DEFINE_PROPERTY_GET2(property_get_active_state, "s", Unit, unit_active_state, unit_active_state_to_string);
49 static BUS_DEFINE_PROPERTY_GET2(property_get_freezer_state, "s", Unit, unit_freezer_state, freezer_state_to_string);
50 static BUS_DEFINE_PROPERTY_GET(property_get_sub_state, "s", Unit, unit_sub_state_to_string);
51 static BUS_DEFINE_PROPERTY_GET2(property_get_unit_file_state, "s", Unit, unit_get_unit_file_state, unit_file_state_to_string);
52 static BUS_DEFINE_PROPERTY_GET(property_get_can_reload, "b", Unit, unit_can_reload);
53 static BUS_DEFINE_PROPERTY_GET(property_get_can_start, "b", Unit, unit_can_start_refuse_manual);
54 static BUS_DEFINE_PROPERTY_GET(property_get_can_stop, "b", Unit, unit_can_stop_refuse_manual);
55 static BUS_DEFINE_PROPERTY_GET(property_get_can_isolate, "b", Unit, unit_can_isolate_refuse_manual);
56 static BUS_DEFINE_PROPERTY_GET(property_get_can_freeze, "b", Unit, unit_can_freeze);
57 static BUS_DEFINE_PROPERTY_GET(property_get_need_daemon_reload, "b", Unit, unit_need_daemon_reload);
58 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_empty_strv, "as", 0);
59
60 static int property_get_can_clean(
61 sd_bus *bus,
62 const char *path,
63 const char *interface,
64 const char *property,
65 sd_bus_message *reply,
66 void *userdata,
67 sd_bus_error *error) {
68
69 Unit *u = userdata;
70 ExecCleanMask mask;
71 int r;
72
73 assert(bus);
74 assert(reply);
75
76 r = unit_can_clean(u, &mask);
77 if (r < 0)
78 return r;
79
80 r = sd_bus_message_open_container(reply, 'a', "s");
81 if (r < 0)
82 return r;
83
84 for (ExecDirectoryType t = 0; t < _EXEC_DIRECTORY_TYPE_MAX; t++) {
85 if (!FLAGS_SET(mask, 1U << t))
86 continue;
87
88 r = sd_bus_message_append(reply, "s", exec_resource_type_to_string(t));
89 if (r < 0)
90 return r;
91 }
92
93 return sd_bus_message_close_container(reply);
94 }
95
96 static int property_get_names(
97 sd_bus *bus,
98 const char *path,
99 const char *interface,
100 const char *property,
101 sd_bus_message *reply,
102 void *userdata,
103 sd_bus_error *error) {
104
105 Unit *u = userdata;
106 const char *t;
107 int r;
108
109 assert(bus);
110 assert(reply);
111 assert(u);
112
113 r = sd_bus_message_open_container(reply, 'a', "s");
114 if (r < 0)
115 return r;
116
117 r = sd_bus_message_append(reply, "s", u->id);
118 if (r < 0)
119 return r;
120
121 SET_FOREACH(t, u->aliases) {
122 r = sd_bus_message_append(reply, "s", t);
123 if (r < 0)
124 return r;
125 }
126
127 return sd_bus_message_close_container(reply);
128 }
129
130 static int property_get_following(
131 sd_bus *bus,
132 const char *path,
133 const char *interface,
134 const char *property,
135 sd_bus_message *reply,
136 void *userdata,
137 sd_bus_error *error) {
138
139 Unit *u = userdata, *f;
140
141 assert(bus);
142 assert(reply);
143 assert(u);
144
145 f = unit_following(u);
146 return sd_bus_message_append(reply, "s", f ? f->id : NULL);
147 }
148
149 static int property_get_dependencies(
150 sd_bus *bus,
151 const char *path,
152 const char *interface,
153 const char *property,
154 sd_bus_message *reply,
155 void *userdata,
156 sd_bus_error *error) {
157
158 Unit *u = userdata, *other;
159 UnitDependency d;
160 Hashmap *deps;
161 void *v;
162 int r;
163
164 assert(bus);
165 assert(reply);
166 assert(u);
167
168 d = unit_dependency_from_string(property);
169 assert_se(d >= 0);
170
171 deps = unit_get_dependencies(u, d);
172
173 r = sd_bus_message_open_container(reply, 'a', "s");
174 if (r < 0)
175 return r;
176
177 HASHMAP_FOREACH_KEY(v, other, deps) {
178 r = sd_bus_message_append(reply, "s", other->id);
179 if (r < 0)
180 return r;
181 }
182
183 return sd_bus_message_close_container(reply);
184 }
185
186 static int property_get_requires_mounts_for(
187 sd_bus *bus,
188 const char *path,
189 const char *interface,
190 const char *property,
191 sd_bus_message *reply,
192 void *userdata,
193 sd_bus_error *error) {
194
195 Hashmap **h = userdata;
196 const char *p;
197 void *v;
198 int r;
199
200 assert(bus);
201 assert(reply);
202 assert(h);
203
204 r = sd_bus_message_open_container(reply, 'a', "s");
205 if (r < 0)
206 return r;
207
208 HASHMAP_FOREACH_KEY(v, p, *h) {
209 r = sd_bus_message_append(reply, "s", p);
210 if (r < 0)
211 return r;
212 }
213
214 return sd_bus_message_close_container(reply);
215 }
216
217 static int property_get_unit_file_preset(
218 sd_bus *bus,
219 const char *path,
220 const char *interface,
221 const char *property,
222 sd_bus_message *reply,
223 void *userdata,
224 sd_bus_error *error) {
225
226 Unit *u = userdata;
227 int r;
228
229 assert(bus);
230 assert(reply);
231 assert(u);
232
233 r = unit_get_unit_file_preset(u);
234
235 return sd_bus_message_append(reply, "s",
236 r < 0 ? NULL:
237 r > 0 ? "enabled" : "disabled");
238 }
239
240 static int property_get_job(
241 sd_bus *bus,
242 const char *path,
243 const char *interface,
244 const char *property,
245 sd_bus_message *reply,
246 void *userdata,
247 sd_bus_error *error) {
248
249 _cleanup_free_ char *p = NULL;
250 Job **j = userdata;
251
252 assert(bus);
253 assert(reply);
254 assert(j);
255
256 if (!*j)
257 return sd_bus_message_append(reply, "(uo)", 0, "/");
258
259 p = job_dbus_path(*j);
260 if (!p)
261 return -ENOMEM;
262
263 return sd_bus_message_append(reply, "(uo)", (*j)->id, p);
264 }
265
266 static int property_get_conditions(
267 sd_bus *bus,
268 const char *path,
269 const char *interface,
270 const char *property,
271 sd_bus_message *reply,
272 void *userdata,
273 sd_bus_error *error) {
274
275 const char *(*to_string)(ConditionType type) = NULL;
276 Condition **list = userdata;
277 int r;
278
279 assert(bus);
280 assert(reply);
281 assert(list);
282
283 to_string = streq(property, "Asserts") ? assert_type_to_string : condition_type_to_string;
284
285 r = sd_bus_message_open_container(reply, 'a', "(sbbsi)");
286 if (r < 0)
287 return r;
288
289 LIST_FOREACH(conditions, c, *list) {
290 int tristate;
291
292 tristate =
293 c->result == CONDITION_UNTESTED ? 0 :
294 c->result == CONDITION_SUCCEEDED ? 1 : -1;
295
296 r = sd_bus_message_append(reply, "(sbbsi)",
297 to_string(c->type),
298 c->trigger, c->negate,
299 c->parameter, tristate);
300 if (r < 0)
301 return r;
302
303 }
304
305 return sd_bus_message_close_container(reply);
306 }
307
308 static int property_get_load_error(
309 sd_bus *bus,
310 const char *path,
311 const char *interface,
312 const char *property,
313 sd_bus_message *reply,
314 void *userdata,
315 sd_bus_error *error) {
316
317 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
318 Unit *u = userdata;
319 int r;
320
321 assert(bus);
322 assert(reply);
323 assert(u);
324
325 r = bus_unit_validate_load_state(u, &e);
326 if (r < 0)
327 return sd_bus_message_append(reply, "(ss)", e.name, e.message);
328
329 return sd_bus_message_append(reply, "(ss)", NULL, NULL);
330 }
331
332 static int property_get_markers(
333 sd_bus *bus,
334 const char *path,
335 const char *interface,
336 const char *property,
337 sd_bus_message *reply,
338 void *userdata,
339 sd_bus_error *error) {
340
341 unsigned *markers = userdata;
342 int r;
343
344 assert(bus);
345 assert(reply);
346 assert(markers);
347
348 r = sd_bus_message_open_container(reply, 'a', "s");
349 if (r < 0)
350 return r;
351
352 /* Make sure out values fit in the bitfield. */
353 assert_cc(_UNIT_MARKER_MAX <= sizeof(((Unit){}).markers) * 8);
354
355 for (UnitMarker m = 0; m < _UNIT_MARKER_MAX; m++)
356 if (FLAGS_SET(*markers, 1u << m)) {
357 r = sd_bus_message_append(reply, "s", unit_marker_to_string(m));
358 if (r < 0)
359 return r;
360 }
361
362 return sd_bus_message_close_container(reply);
363 }
364
365 static const char *const polkit_message_for_job[_JOB_TYPE_MAX] = {
366 [JOB_START] = N_("Authentication is required to start '$(unit)'."),
367 [JOB_STOP] = N_("Authentication is required to stop '$(unit)'."),
368 [JOB_RELOAD] = N_("Authentication is required to reload '$(unit)'."),
369 [JOB_RESTART] = N_("Authentication is required to restart '$(unit)'."),
370 [JOB_TRY_RESTART] = N_("Authentication is required to restart '$(unit)'."),
371 };
372
373 int bus_unit_method_start_generic(
374 sd_bus_message *message,
375 Unit *u,
376 JobType job_type,
377 bool reload_if_possible,
378 sd_bus_error *error) {
379
380 BusUnitQueueFlags job_flags = reload_if_possible ? BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE : 0;
381 const char *smode, *verb;
382 JobMode mode;
383 int r;
384
385 assert(message);
386 assert(u);
387 assert(job_type >= 0 && job_type < _JOB_TYPE_MAX);
388
389 r = mac_selinux_unit_access_check(
390 u, message,
391 job_type_to_access_method(job_type),
392 error);
393 if (r < 0)
394 return r;
395
396 r = sd_bus_message_read(message, "s", &smode);
397 if (r < 0)
398 return r;
399
400 mode = job_mode_from_string(smode);
401 if (mode < 0)
402 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job mode %s invalid", smode);
403
404 if (reload_if_possible)
405 verb = strjoina("reload-or-", job_type_to_string(job_type));
406 else
407 verb = job_type_to_string(job_type);
408
409 if (sd_bus_message_is_method_call(message, NULL, "StartUnitWithFlags")) {
410 uint64_t input_flags = 0;
411
412 r = sd_bus_message_read(message, "t", &input_flags);
413 if (r < 0)
414 return r;
415 /* Let clients know that this version doesn't support any flags at the moment. */
416 if (input_flags != 0)
417 return sd_bus_reply_method_errorf(message, SD_BUS_ERROR_INVALID_ARGS,
418 "Invalid 'flags' parameter '%" PRIu64 "'",
419 input_flags);
420 }
421
422 r = bus_verify_manage_units_async_full(
423 u,
424 verb,
425 CAP_SYS_ADMIN,
426 polkit_message_for_job[job_type],
427 true,
428 message,
429 error);
430 if (r < 0)
431 return r;
432 if (r == 0)
433 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
434
435 return bus_unit_queue_job(message, u, job_type, mode, job_flags, error);
436 }
437
438 static int bus_unit_method_start(sd_bus_message *message, void *userdata, sd_bus_error *error) {
439 return bus_unit_method_start_generic(message, userdata, JOB_START, false, error);
440 }
441
442 static int bus_unit_method_stop(sd_bus_message *message, void *userdata, sd_bus_error *error) {
443 return bus_unit_method_start_generic(message, userdata, JOB_STOP, false, error);
444 }
445
446 static int bus_unit_method_reload(sd_bus_message *message, void *userdata, sd_bus_error *error) {
447 return bus_unit_method_start_generic(message, userdata, JOB_RELOAD, false, error);
448 }
449
450 static int bus_unit_method_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
451 return bus_unit_method_start_generic(message, userdata, JOB_RESTART, false, error);
452 }
453
454 static int bus_unit_method_try_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
455 return bus_unit_method_start_generic(message, userdata, JOB_TRY_RESTART, false, error);
456 }
457
458 static int bus_unit_method_reload_or_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
459 return bus_unit_method_start_generic(message, userdata, JOB_RESTART, true, error);
460 }
461
462 static int bus_unit_method_reload_or_try_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
463 return bus_unit_method_start_generic(message, userdata, JOB_TRY_RESTART, true, error);
464 }
465
466 int bus_unit_method_enqueue_job(sd_bus_message *message, void *userdata, sd_bus_error *error) {
467 BusUnitQueueFlags flags = BUS_UNIT_QUEUE_VERBOSE_REPLY;
468 const char *jtype, *smode;
469 Unit *u = userdata;
470 JobType type;
471 JobMode mode;
472 int r;
473
474 assert(message);
475 assert(u);
476
477 r = sd_bus_message_read(message, "ss", &jtype, &smode);
478 if (r < 0)
479 return r;
480
481 /* Parse the two magic reload types "reload-or-…" manually */
482 if (streq(jtype, "reload-or-restart")) {
483 type = JOB_RESTART;
484 flags |= BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE;
485 } else if (streq(jtype, "reload-or-try-restart")) {
486 type = JOB_TRY_RESTART;
487 flags |= BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE;
488 } else {
489 /* And the rest generically */
490 type = job_type_from_string(jtype);
491 if (type < 0)
492 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job type %s invalid", jtype);
493 }
494
495 mode = job_mode_from_string(smode);
496 if (mode < 0)
497 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job mode %s invalid", smode);
498
499 r = mac_selinux_unit_access_check(
500 u, message,
501 job_type_to_access_method(type),
502 error);
503 if (r < 0)
504 return r;
505
506 r = bus_verify_manage_units_async_full(
507 u,
508 jtype,
509 CAP_SYS_ADMIN,
510 polkit_message_for_job[type],
511 true,
512 message,
513 error);
514 if (r < 0)
515 return r;
516 if (r == 0)
517 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
518
519 return bus_unit_queue_job(message, u, type, mode, flags, error);
520 }
521
522 int bus_unit_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) {
523 Unit *u = userdata;
524 const char *swho;
525 int32_t signo;
526 KillWho who;
527 int r;
528
529 assert(message);
530 assert(u);
531
532 r = mac_selinux_unit_access_check(u, message, "stop", error);
533 if (r < 0)
534 return r;
535
536 r = sd_bus_message_read(message, "si", &swho, &signo);
537 if (r < 0)
538 return r;
539
540 if (isempty(swho))
541 who = KILL_ALL;
542 else {
543 who = kill_who_from_string(swho);
544 if (who < 0)
545 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid who argument %s", swho);
546 }
547
548 if (!SIGNAL_VALID(signo))
549 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Signal number out of range.");
550
551 r = bus_verify_manage_units_async_full(
552 u,
553 "kill",
554 CAP_KILL,
555 N_("Authentication is required to send a UNIX signal to the processes of '$(unit)'."),
556 true,
557 message,
558 error);
559 if (r < 0)
560 return r;
561 if (r == 0)
562 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
563
564 r = unit_kill(u, who, signo, error);
565 if (r < 0)
566 return r;
567
568 return sd_bus_reply_method_return(message, NULL);
569 }
570
571 int bus_unit_method_reset_failed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
572 Unit *u = userdata;
573 int r;
574
575 assert(message);
576 assert(u);
577
578 r = mac_selinux_unit_access_check(u, message, "reload", error);
579 if (r < 0)
580 return r;
581
582 r = bus_verify_manage_units_async_full(
583 u,
584 "reset-failed",
585 CAP_SYS_ADMIN,
586 N_("Authentication is required to reset the \"failed\" state of '$(unit)'."),
587 true,
588 message,
589 error);
590 if (r < 0)
591 return r;
592 if (r == 0)
593 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
594
595 unit_reset_failed(u);
596
597 return sd_bus_reply_method_return(message, NULL);
598 }
599
600 int bus_unit_method_set_properties(sd_bus_message *message, void *userdata, sd_bus_error *error) {
601 Unit *u = userdata;
602 int runtime, r;
603
604 assert(message);
605 assert(u);
606
607 r = mac_selinux_unit_access_check(u, message, "start", error);
608 if (r < 0)
609 return r;
610
611 r = sd_bus_message_read(message, "b", &runtime);
612 if (r < 0)
613 return r;
614
615 r = bus_verify_manage_units_async_full(
616 u,
617 "set-property",
618 CAP_SYS_ADMIN,
619 N_("Authentication is required to set properties on '$(unit)'."),
620 true,
621 message,
622 error);
623 if (r < 0)
624 return r;
625 if (r == 0)
626 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
627
628 r = bus_unit_set_properties(u, message, runtime ? UNIT_RUNTIME : UNIT_PERSISTENT, true, error);
629 if (r < 0)
630 return r;
631
632 return sd_bus_reply_method_return(message, NULL);
633 }
634
635 int bus_unit_method_ref(sd_bus_message *message, void *userdata, sd_bus_error *error) {
636 Unit *u = userdata;
637 int r;
638
639 assert(message);
640 assert(u);
641
642 r = mac_selinux_unit_access_check(u, message, "start", error);
643 if (r < 0)
644 return r;
645
646 r = bus_verify_manage_units_async_full(
647 u,
648 "ref",
649 CAP_SYS_ADMIN,
650 NULL,
651 false,
652 message,
653 error);
654 if (r < 0)
655 return r;
656 if (r == 0)
657 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
658
659 r = bus_unit_track_add_sender(u, message);
660 if (r < 0)
661 return r;
662
663 return sd_bus_reply_method_return(message, NULL);
664 }
665
666 int bus_unit_method_unref(sd_bus_message *message, void *userdata, sd_bus_error *error) {
667 Unit *u = userdata;
668 int r;
669
670 assert(message);
671 assert(u);
672
673 r = bus_unit_track_remove_sender(u, message);
674 if (r == -EUNATCH)
675 return sd_bus_error_set(error, BUS_ERROR_NOT_REFERENCED, "Unit has not been referenced yet.");
676 if (r < 0)
677 return r;
678
679 return sd_bus_reply_method_return(message, NULL);
680 }
681
682 int bus_unit_method_clean(sd_bus_message *message, void *userdata, sd_bus_error *error) {
683 ExecCleanMask mask = 0;
684 Unit *u = userdata;
685 int r;
686
687 assert(message);
688 assert(u);
689
690 r = mac_selinux_unit_access_check(u, message, "stop", error);
691 if (r < 0)
692 return r;
693
694 r = sd_bus_message_enter_container(message, 'a', "s");
695 if (r < 0)
696 return r;
697
698 for (;;) {
699 const char *i;
700
701 r = sd_bus_message_read(message, "s", &i);
702 if (r < 0)
703 return r;
704 if (r == 0)
705 break;
706
707 if (streq(i, "all"))
708 mask |= EXEC_CLEAN_ALL;
709 else {
710 ExecDirectoryType t;
711
712 t = exec_resource_type_from_string(i);
713 if (t < 0)
714 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid resource type: %s", i);
715
716 mask |= 1U << t;
717 }
718 }
719
720 r = sd_bus_message_exit_container(message);
721 if (r < 0)
722 return r;
723
724 r = bus_verify_manage_units_async_full(
725 u,
726 "clean",
727 CAP_DAC_OVERRIDE,
728 N_("Authentication is required to delete files and directories associated with '$(unit)'."),
729 true,
730 message,
731 error);
732 if (r < 0)
733 return r;
734 if (r == 0)
735 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
736
737 r = unit_clean(u, mask);
738 if (r == -EOPNOTSUPP)
739 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Unit '%s' does not supporting cleaning.", u->id);
740 if (r == -EUNATCH)
741 return sd_bus_error_set(error, BUS_ERROR_NOTHING_TO_CLEAN, "No matching resources found.");
742 if (r == -EBUSY)
743 return sd_bus_error_set(error, BUS_ERROR_UNIT_BUSY, "Unit is not inactive or has pending job.");
744 if (r < 0)
745 return r;
746
747 return sd_bus_reply_method_return(message, NULL);
748 }
749
750 static int bus_unit_method_freezer_generic(sd_bus_message *message, void *userdata, sd_bus_error *error, FreezerAction action) {
751 const char* perm;
752 int (*method)(Unit*);
753 Unit *u = userdata;
754 bool reply_no_delay = false;
755 int r;
756
757 assert(message);
758 assert(u);
759 assert(IN_SET(action, FREEZER_FREEZE, FREEZER_THAW));
760
761 if (action == FREEZER_FREEZE) {
762 perm = "stop";
763 method = unit_freeze;
764 } else {
765 perm = "start";
766 method = unit_thaw;
767 }
768
769 r = mac_selinux_unit_access_check(u, message, perm, error);
770 if (r < 0)
771 return r;
772
773 r = bus_verify_manage_units_async_full(
774 u,
775 perm,
776 CAP_SYS_ADMIN,
777 N_("Authentication is required to freeze or thaw the processes of '$(unit)' unit."),
778 true,
779 message,
780 error);
781 if (r < 0)
782 return r;
783 if (r == 0)
784 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
785
786 r = method(u);
787 if (r == -EOPNOTSUPP)
788 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Unit '%s' does not support freezing.", u->id);
789 if (r == -EBUSY)
790 return sd_bus_error_set(error, BUS_ERROR_UNIT_BUSY, "Unit has a pending job.");
791 if (r == -EHOSTDOWN)
792 return sd_bus_error_set(error, BUS_ERROR_UNIT_INACTIVE, "Unit is inactive.");
793 if (r == -EALREADY)
794 return sd_bus_error_setf(error, SD_BUS_ERROR_FAILED, "Previously requested freezer operation for unit '%s' is still in progress.", u->id);
795 if (r < 0)
796 return r;
797 if (r == 0)
798 reply_no_delay = true;
799
800 assert(!u->pending_freezer_message);
801
802 r = sd_bus_message_new_method_return(message, &u->pending_freezer_message);
803 if (r < 0)
804 return r;
805
806 if (reply_no_delay) {
807 r = bus_unit_send_pending_freezer_message(u);
808 if (r < 0)
809 return r;
810 }
811
812 return 1;
813 }
814
815 int bus_unit_method_thaw(sd_bus_message *message, void *userdata, sd_bus_error *error) {
816 return bus_unit_method_freezer_generic(message, userdata, error, FREEZER_THAW);
817 }
818
819 int bus_unit_method_freeze(sd_bus_message *message, void *userdata, sd_bus_error *error) {
820 return bus_unit_method_freezer_generic(message, userdata, error, FREEZER_FREEZE);
821 }
822
823 static int property_get_refs(
824 sd_bus *bus,
825 const char *path,
826 const char *interface,
827 const char *property,
828 sd_bus_message *reply,
829 void *userdata,
830 sd_bus_error *error) {
831
832 Unit *u = userdata;
833 int r;
834
835 assert(bus);
836 assert(reply);
837
838 r = sd_bus_message_open_container(reply, 'a', "s");
839 if (r < 0)
840 return r;
841
842 for (const char *i = sd_bus_track_first(u->bus_track); i; i = sd_bus_track_next(u->bus_track)) {
843 int c;
844
845 c = sd_bus_track_count_name(u->bus_track, i);
846 if (c < 0)
847 return c;
848
849 /* Add the item multiple times if the ref count for each is above 1 */
850 for (int k = 0; k < c; k++) {
851 r = sd_bus_message_append(reply, "s", i);
852 if (r < 0)
853 return r;
854 }
855 }
856
857 return sd_bus_message_close_container(reply);
858 }
859
860 const sd_bus_vtable bus_unit_vtable[] = {
861 SD_BUS_VTABLE_START(0),
862
863 SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Unit, id), SD_BUS_VTABLE_PROPERTY_CONST),
864 SD_BUS_PROPERTY("Names", "as", property_get_names, 0, SD_BUS_VTABLE_PROPERTY_CONST),
865 SD_BUS_PROPERTY("Following", "s", property_get_following, 0, 0),
866 SD_BUS_PROPERTY("Requires", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
867 SD_BUS_PROPERTY("Requisite", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
868 SD_BUS_PROPERTY("Wants", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
869 SD_BUS_PROPERTY("BindsTo", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
870 SD_BUS_PROPERTY("PartOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
871 SD_BUS_PROPERTY("Upholds", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
872 SD_BUS_PROPERTY("RequiredBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
873 SD_BUS_PROPERTY("RequisiteOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
874 SD_BUS_PROPERTY("WantedBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
875 SD_BUS_PROPERTY("BoundBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
876 SD_BUS_PROPERTY("UpheldBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
877 SD_BUS_PROPERTY("ConsistsOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
878 SD_BUS_PROPERTY("Conflicts", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
879 SD_BUS_PROPERTY("ConflictedBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
880 SD_BUS_PROPERTY("Before", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
881 SD_BUS_PROPERTY("After", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
882 SD_BUS_PROPERTY("OnSuccess", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
883 SD_BUS_PROPERTY("OnSuccessOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
884 SD_BUS_PROPERTY("OnFailure", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
885 SD_BUS_PROPERTY("OnFailureOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
886 SD_BUS_PROPERTY("Triggers", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
887 SD_BUS_PROPERTY("TriggeredBy", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
888 SD_BUS_PROPERTY("PropagatesReloadTo", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
889 SD_BUS_PROPERTY("ReloadPropagatedFrom", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
890 SD_BUS_PROPERTY("PropagatesStopTo", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
891 SD_BUS_PROPERTY("StopPropagatedFrom", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
892 SD_BUS_PROPERTY("JoinsNamespaceOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
893 SD_BUS_PROPERTY("SliceOf", "as", property_get_dependencies, 0, SD_BUS_VTABLE_PROPERTY_CONST),
894 SD_BUS_PROPERTY("RequiresMountsFor", "as", property_get_requires_mounts_for, offsetof(Unit, requires_mounts_for), SD_BUS_VTABLE_PROPERTY_CONST),
895 SD_BUS_PROPERTY("Documentation", "as", NULL, offsetof(Unit, documentation), SD_BUS_VTABLE_PROPERTY_CONST),
896 SD_BUS_PROPERTY("Description", "s", property_get_description, 0, SD_BUS_VTABLE_PROPERTY_CONST),
897 SD_BUS_PROPERTY("LoadState", "s", property_get_load_state, offsetof(Unit, load_state), SD_BUS_VTABLE_PROPERTY_CONST),
898 SD_BUS_PROPERTY("ActiveState", "s", property_get_active_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
899 SD_BUS_PROPERTY("FreezerState", "s", property_get_freezer_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
900 SD_BUS_PROPERTY("SubState", "s", property_get_sub_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
901 SD_BUS_PROPERTY("FragmentPath", "s", NULL, offsetof(Unit, fragment_path), SD_BUS_VTABLE_PROPERTY_CONST),
902 SD_BUS_PROPERTY("SourcePath", "s", NULL, offsetof(Unit, source_path), SD_BUS_VTABLE_PROPERTY_CONST),
903 SD_BUS_PROPERTY("DropInPaths", "as", NULL, offsetof(Unit, dropin_paths), SD_BUS_VTABLE_PROPERTY_CONST),
904 SD_BUS_PROPERTY("UnitFileState", "s", property_get_unit_file_state, 0, 0),
905 SD_BUS_PROPERTY("UnitFilePreset", "s", property_get_unit_file_preset, 0, 0),
906 BUS_PROPERTY_DUAL_TIMESTAMP("StateChangeTimestamp", offsetof(Unit, state_change_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
907 BUS_PROPERTY_DUAL_TIMESTAMP("InactiveExitTimestamp", offsetof(Unit, inactive_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
908 BUS_PROPERTY_DUAL_TIMESTAMP("ActiveEnterTimestamp", offsetof(Unit, active_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
909 BUS_PROPERTY_DUAL_TIMESTAMP("ActiveExitTimestamp", offsetof(Unit, active_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
910 BUS_PROPERTY_DUAL_TIMESTAMP("InactiveEnterTimestamp", offsetof(Unit, inactive_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
911 SD_BUS_PROPERTY("CanStart", "b", property_get_can_start, 0, SD_BUS_VTABLE_PROPERTY_CONST),
912 SD_BUS_PROPERTY("CanStop", "b", property_get_can_stop, 0, SD_BUS_VTABLE_PROPERTY_CONST),
913 SD_BUS_PROPERTY("CanReload", "b", property_get_can_reload, 0, SD_BUS_VTABLE_PROPERTY_CONST),
914 SD_BUS_PROPERTY("CanIsolate", "b", property_get_can_isolate, 0, SD_BUS_VTABLE_PROPERTY_CONST),
915 SD_BUS_PROPERTY("CanClean", "as", property_get_can_clean, 0, SD_BUS_VTABLE_PROPERTY_CONST),
916 SD_BUS_PROPERTY("CanFreeze", "b", property_get_can_freeze, 0, SD_BUS_VTABLE_PROPERTY_CONST),
917 SD_BUS_PROPERTY("Job", "(uo)", property_get_job, offsetof(Unit, job), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
918 SD_BUS_PROPERTY("StopWhenUnneeded", "b", bus_property_get_bool, offsetof(Unit, stop_when_unneeded), SD_BUS_VTABLE_PROPERTY_CONST),
919 SD_BUS_PROPERTY("RefuseManualStart", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_start), SD_BUS_VTABLE_PROPERTY_CONST),
920 SD_BUS_PROPERTY("RefuseManualStop", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_stop), SD_BUS_VTABLE_PROPERTY_CONST),
921 SD_BUS_PROPERTY("AllowIsolate", "b", bus_property_get_bool, offsetof(Unit, allow_isolate), SD_BUS_VTABLE_PROPERTY_CONST),
922 SD_BUS_PROPERTY("DefaultDependencies", "b", bus_property_get_bool, offsetof(Unit, default_dependencies), SD_BUS_VTABLE_PROPERTY_CONST),
923 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 */
924 SD_BUS_PROPERTY("OnSuccessJobMode", "s", property_get_job_mode, offsetof(Unit, on_success_job_mode), SD_BUS_VTABLE_PROPERTY_CONST),
925 SD_BUS_PROPERTY("OnFailureJobMode", "s", property_get_job_mode, offsetof(Unit, on_failure_job_mode), SD_BUS_VTABLE_PROPERTY_CONST),
926 SD_BUS_PROPERTY("IgnoreOnIsolate", "b", bus_property_get_bool, offsetof(Unit, ignore_on_isolate), SD_BUS_VTABLE_PROPERTY_CONST),
927 SD_BUS_PROPERTY("NeedDaemonReload", "b", property_get_need_daemon_reload, 0, 0),
928 SD_BUS_PROPERTY("Markers", "as", property_get_markers, offsetof(Unit, markers), 0),
929 SD_BUS_PROPERTY("JobTimeoutUSec", "t", bus_property_get_usec, offsetof(Unit, job_timeout), SD_BUS_VTABLE_PROPERTY_CONST),
930 SD_BUS_PROPERTY("JobRunningTimeoutUSec", "t", bus_property_get_usec, offsetof(Unit, job_running_timeout), SD_BUS_VTABLE_PROPERTY_CONST),
931 SD_BUS_PROPERTY("JobTimeoutAction", "s", bus_property_get_emergency_action, offsetof(Unit, job_timeout_action), SD_BUS_VTABLE_PROPERTY_CONST),
932 SD_BUS_PROPERTY("JobTimeoutRebootArgument", "s", NULL, offsetof(Unit, job_timeout_reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST),
933 SD_BUS_PROPERTY("ConditionResult", "b", bus_property_get_bool, offsetof(Unit, condition_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
934 SD_BUS_PROPERTY("AssertResult", "b", bus_property_get_bool, offsetof(Unit, assert_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
935 BUS_PROPERTY_DUAL_TIMESTAMP("ConditionTimestamp", offsetof(Unit, condition_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
936 BUS_PROPERTY_DUAL_TIMESTAMP("AssertTimestamp", offsetof(Unit, assert_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
937 SD_BUS_PROPERTY("Conditions", "a(sbbsi)", property_get_conditions, offsetof(Unit, conditions), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
938 SD_BUS_PROPERTY("Asserts", "a(sbbsi)", property_get_conditions, offsetof(Unit, asserts), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
939 SD_BUS_PROPERTY("LoadError", "(ss)", property_get_load_error, 0, SD_BUS_VTABLE_PROPERTY_CONST),
940 SD_BUS_PROPERTY("Transient", "b", bus_property_get_bool, offsetof(Unit, transient), SD_BUS_VTABLE_PROPERTY_CONST),
941 SD_BUS_PROPERTY("Perpetual", "b", bus_property_get_bool, offsetof(Unit, perpetual), SD_BUS_VTABLE_PROPERTY_CONST),
942 SD_BUS_PROPERTY("StartLimitIntervalUSec", "t", bus_property_get_usec, offsetof(Unit, start_ratelimit.interval), SD_BUS_VTABLE_PROPERTY_CONST),
943 SD_BUS_PROPERTY("StartLimitBurst", "u", bus_property_get_unsigned, offsetof(Unit, start_ratelimit.burst), SD_BUS_VTABLE_PROPERTY_CONST),
944 SD_BUS_PROPERTY("StartLimitAction", "s", bus_property_get_emergency_action, offsetof(Unit, start_limit_action), SD_BUS_VTABLE_PROPERTY_CONST),
945 SD_BUS_PROPERTY("FailureAction", "s", bus_property_get_emergency_action, offsetof(Unit, failure_action), SD_BUS_VTABLE_PROPERTY_CONST),
946 SD_BUS_PROPERTY("FailureActionExitStatus", "i", bus_property_get_int, offsetof(Unit, failure_action_exit_status), SD_BUS_VTABLE_PROPERTY_CONST),
947 SD_BUS_PROPERTY("SuccessAction", "s", bus_property_get_emergency_action, offsetof(Unit, success_action), SD_BUS_VTABLE_PROPERTY_CONST),
948 SD_BUS_PROPERTY("SuccessActionExitStatus", "i", bus_property_get_int, offsetof(Unit, success_action_exit_status), SD_BUS_VTABLE_PROPERTY_CONST),
949 SD_BUS_PROPERTY("RebootArgument", "s", NULL, offsetof(Unit, reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST),
950 SD_BUS_PROPERTY("InvocationID", "ay", bus_property_get_id128, offsetof(Unit, invocation_id), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
951 SD_BUS_PROPERTY("CollectMode", "s", property_get_collect_mode, offsetof(Unit, collect_mode), SD_BUS_VTABLE_PROPERTY_CONST),
952 SD_BUS_PROPERTY("Refs", "as", property_get_refs, 0, 0),
953
954 SD_BUS_METHOD_WITH_NAMES("Start",
955 "s",
956 SD_BUS_PARAM(mode),
957 "o",
958 SD_BUS_PARAM(job),
959 bus_unit_method_start,
960 SD_BUS_VTABLE_UNPRIVILEGED),
961 SD_BUS_METHOD_WITH_NAMES("Stop",
962 "s",
963 SD_BUS_PARAM(mode),
964 "o",
965 SD_BUS_PARAM(job),
966 bus_unit_method_stop,
967 SD_BUS_VTABLE_UNPRIVILEGED),
968 SD_BUS_METHOD_WITH_NAMES("Reload",
969 "s",
970 SD_BUS_PARAM(mode),
971 "o",
972 SD_BUS_PARAM(job),
973 bus_unit_method_reload,
974 SD_BUS_VTABLE_UNPRIVILEGED),
975 SD_BUS_METHOD_WITH_NAMES("Restart",
976 "s",
977 SD_BUS_PARAM(mode),
978 "o",
979 SD_BUS_PARAM(job),
980 bus_unit_method_restart,
981 SD_BUS_VTABLE_UNPRIVILEGED),
982 SD_BUS_METHOD_WITH_NAMES("TryRestart",
983 "s",
984 SD_BUS_PARAM(mode),
985 "o",
986 SD_BUS_PARAM(job),
987 bus_unit_method_try_restart,
988 SD_BUS_VTABLE_UNPRIVILEGED),
989 SD_BUS_METHOD_WITH_NAMES("ReloadOrRestart",
990 "s",
991 SD_BUS_PARAM(mode),
992 "o",
993 SD_BUS_PARAM(job),
994 bus_unit_method_reload_or_restart,
995 SD_BUS_VTABLE_UNPRIVILEGED),
996 SD_BUS_METHOD_WITH_NAMES("ReloadOrTryRestart",
997 "s",
998 SD_BUS_PARAM(mode),
999 "o",
1000 SD_BUS_PARAM(job),
1001 bus_unit_method_reload_or_try_restart,
1002 SD_BUS_VTABLE_UNPRIVILEGED),
1003 SD_BUS_METHOD_WITH_NAMES("EnqueueJob",
1004 "ss",
1005 SD_BUS_PARAM(job_type)
1006 SD_BUS_PARAM(job_mode),
1007 "uososa(uosos)",
1008 SD_BUS_PARAM(job_id)
1009 SD_BUS_PARAM(job_path)
1010 SD_BUS_PARAM(unit_id)
1011 SD_BUS_PARAM(unit_path)
1012 SD_BUS_PARAM(job_type)
1013 SD_BUS_PARAM(affected_jobs),
1014 bus_unit_method_enqueue_job,
1015 SD_BUS_VTABLE_UNPRIVILEGED),
1016 SD_BUS_METHOD_WITH_NAMES("Kill",
1017 "si",
1018 SD_BUS_PARAM(whom)
1019 SD_BUS_PARAM(signal),
1020 NULL,,
1021 bus_unit_method_kill,
1022 SD_BUS_VTABLE_UNPRIVILEGED),
1023 SD_BUS_METHOD("ResetFailed",
1024 NULL,
1025 NULL,
1026 bus_unit_method_reset_failed,
1027 SD_BUS_VTABLE_UNPRIVILEGED),
1028 SD_BUS_METHOD_WITH_NAMES("SetProperties",
1029 "ba(sv)",
1030 SD_BUS_PARAM(runtime)
1031 SD_BUS_PARAM(properties),
1032 NULL,,
1033 bus_unit_method_set_properties,
1034 SD_BUS_VTABLE_UNPRIVILEGED),
1035 SD_BUS_METHOD("Ref",
1036 NULL,
1037 NULL,
1038 bus_unit_method_ref,
1039 SD_BUS_VTABLE_UNPRIVILEGED),
1040 SD_BUS_METHOD("Unref",
1041 NULL,
1042 NULL,
1043 bus_unit_method_unref,
1044 SD_BUS_VTABLE_UNPRIVILEGED),
1045 SD_BUS_METHOD_WITH_NAMES("Clean",
1046 "as",
1047 SD_BUS_PARAM(mask),
1048 NULL,,
1049 bus_unit_method_clean,
1050 SD_BUS_VTABLE_UNPRIVILEGED),
1051 SD_BUS_METHOD("Freeze",
1052 NULL,
1053 NULL,
1054 bus_unit_method_freeze,
1055 SD_BUS_VTABLE_UNPRIVILEGED),
1056 SD_BUS_METHOD("Thaw",
1057 NULL,
1058 NULL,
1059 bus_unit_method_thaw,
1060 SD_BUS_VTABLE_UNPRIVILEGED),
1061
1062 /* For dependency types we don't support anymore always return an empty array */
1063 SD_BUS_PROPERTY("RequiresOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN),
1064 SD_BUS_PROPERTY("RequisiteOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN),
1065 SD_BUS_PROPERTY("RequiredByOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN),
1066 SD_BUS_PROPERTY("RequisiteOfOverridable", "as", property_get_empty_strv, 0, SD_BUS_VTABLE_HIDDEN),
1067 /* Obsolete alias names */
1068 SD_BUS_PROPERTY("StartLimitInterval", "t", bus_property_get_usec, offsetof(Unit, start_ratelimit.interval), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
1069 SD_BUS_PROPERTY("StartLimitIntervalSec", "t", bus_property_get_usec, offsetof(Unit, start_ratelimit.interval), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
1070
1071 SD_BUS_VTABLE_END
1072 };
1073
1074 static int property_get_slice(
1075 sd_bus *bus,
1076 const char *path,
1077 const char *interface,
1078 const char *property,
1079 sd_bus_message *reply,
1080 void *userdata,
1081 sd_bus_error *error) {
1082
1083 Unit *u = userdata;
1084
1085 assert(bus);
1086 assert(reply);
1087 assert(u);
1088
1089 return sd_bus_message_append(reply, "s", unit_slice_name(u));
1090 }
1091
1092 static int property_get_current_memory(
1093 sd_bus *bus,
1094 const char *path,
1095 const char *interface,
1096 const char *property,
1097 sd_bus_message *reply,
1098 void *userdata,
1099 sd_bus_error *error) {
1100
1101 uint64_t sz = UINT64_MAX;
1102 Unit *u = userdata;
1103 int r;
1104
1105 assert(bus);
1106 assert(reply);
1107 assert(u);
1108
1109 r = unit_get_memory_current(u, &sz);
1110 if (r < 0 && r != -ENODATA)
1111 log_unit_warning_errno(u, r, "Failed to get memory.usage_in_bytes attribute: %m");
1112
1113 return sd_bus_message_append(reply, "t", sz);
1114 }
1115
1116 static int property_get_available_memory(
1117 sd_bus *bus,
1118 const char *path,
1119 const char *interface,
1120 const char *property,
1121 sd_bus_message *reply,
1122 void *userdata,
1123 sd_bus_error *error) {
1124
1125 uint64_t sz = UINT64_MAX;
1126 Unit *u = userdata;
1127 int r;
1128
1129 assert(bus);
1130 assert(reply);
1131 assert(u);
1132
1133 r = unit_get_memory_available(u, &sz);
1134 if (r < 0 && r != -ENODATA)
1135 log_unit_warning_errno(u, r, "Failed to get total available memory from cgroup: %m");
1136
1137 return sd_bus_message_append(reply, "t", sz);
1138 }
1139
1140 static int property_get_current_tasks(
1141 sd_bus *bus,
1142 const char *path,
1143 const char *interface,
1144 const char *property,
1145 sd_bus_message *reply,
1146 void *userdata,
1147 sd_bus_error *error) {
1148
1149 uint64_t cn = UINT64_MAX;
1150 Unit *u = userdata;
1151 int r;
1152
1153 assert(bus);
1154 assert(reply);
1155 assert(u);
1156
1157 r = unit_get_tasks_current(u, &cn);
1158 if (r < 0 && r != -ENODATA)
1159 log_unit_warning_errno(u, r, "Failed to get pids.current attribute: %m");
1160
1161 return sd_bus_message_append(reply, "t", cn);
1162 }
1163
1164 static int property_get_cpu_usage(
1165 sd_bus *bus,
1166 const char *path,
1167 const char *interface,
1168 const char *property,
1169 sd_bus_message *reply,
1170 void *userdata,
1171 sd_bus_error *error) {
1172
1173 nsec_t ns = NSEC_INFINITY;
1174 Unit *u = userdata;
1175 int r;
1176
1177 assert(bus);
1178 assert(reply);
1179 assert(u);
1180
1181 r = unit_get_cpu_usage(u, &ns);
1182 if (r < 0 && r != -ENODATA)
1183 log_unit_warning_errno(u, r, "Failed to get cpuacct.usage attribute: %m");
1184
1185 return sd_bus_message_append(reply, "t", ns);
1186 }
1187
1188 static int property_get_cpuset_cpus(
1189 sd_bus *bus,
1190 const char *path,
1191 const char *interface,
1192 const char *property,
1193 sd_bus_message *reply,
1194 void *userdata,
1195 sd_bus_error *error) {
1196
1197 Unit *u = userdata;
1198 _cleanup_(cpu_set_reset) CPUSet cpus = {};
1199 _cleanup_free_ uint8_t *array = NULL;
1200 size_t allocated;
1201
1202 assert(bus);
1203 assert(reply);
1204 assert(u);
1205
1206 (void) unit_get_cpuset(u, &cpus, "cpuset.cpus.effective");
1207 (void) cpu_set_to_dbus(&cpus, &array, &allocated);
1208 return sd_bus_message_append_array(reply, 'y', array, allocated);
1209 }
1210
1211 static int property_get_cpuset_mems(
1212 sd_bus *bus,
1213 const char *path,
1214 const char *interface,
1215 const char *property,
1216 sd_bus_message *reply,
1217 void *userdata,
1218 sd_bus_error *error) {
1219
1220 Unit *u = userdata;
1221 _cleanup_(cpu_set_reset) CPUSet mems = {};
1222 _cleanup_free_ uint8_t *array = NULL;
1223 size_t allocated;
1224
1225 assert(bus);
1226 assert(reply);
1227 assert(u);
1228
1229 (void) unit_get_cpuset(u, &mems, "cpuset.mems.effective");
1230 (void) cpu_set_to_dbus(&mems, &array, &allocated);
1231 return sd_bus_message_append_array(reply, 'y', array, allocated);
1232 }
1233
1234 static int property_get_cgroup(
1235 sd_bus *bus,
1236 const char *path,
1237 const char *interface,
1238 const char *property,
1239 sd_bus_message *reply,
1240 void *userdata,
1241 sd_bus_error *error) {
1242
1243 Unit *u = userdata;
1244 const char *t = NULL;
1245
1246 assert(bus);
1247 assert(reply);
1248 assert(u);
1249
1250 /* Three cases: a) u->cgroup_path is NULL, in which case the
1251 * unit has no control group, which we report as the empty
1252 * string. b) u->cgroup_path is the empty string, which
1253 * indicates the root cgroup, which we report as "/". c) all
1254 * other cases we report as-is. */
1255
1256 if (u->cgroup_path)
1257 t = empty_to_root(u->cgroup_path);
1258
1259 return sd_bus_message_append(reply, "s", t);
1260 }
1261
1262 static int append_process(sd_bus_message *reply, const char *p, pid_t pid, Set *pids) {
1263 _cleanup_free_ char *buf = NULL, *cmdline = NULL;
1264 int r;
1265
1266 assert(reply);
1267 assert(pid > 0);
1268
1269 r = set_put(pids, PID_TO_PTR(pid));
1270 if (IN_SET(r, 0, -EEXIST))
1271 return 0;
1272 if (r < 0)
1273 return r;
1274
1275 if (!p) {
1276 r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &buf);
1277 if (r == -ESRCH)
1278 return 0;
1279 if (r < 0)
1280 return r;
1281
1282 p = buf;
1283 }
1284
1285 (void) get_process_cmdline(pid, SIZE_MAX,
1286 PROCESS_CMDLINE_COMM_FALLBACK | PROCESS_CMDLINE_QUOTE,
1287 &cmdline);
1288
1289 return sd_bus_message_append(reply,
1290 "(sus)",
1291 p,
1292 (uint32_t) pid,
1293 cmdline);
1294 }
1295
1296 static int append_cgroup(sd_bus_message *reply, const char *p, Set *pids) {
1297 _cleanup_closedir_ DIR *d = NULL;
1298 _cleanup_fclose_ FILE *f = NULL;
1299 int r;
1300
1301 assert(reply);
1302 assert(p);
1303
1304 r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, p, &f);
1305 if (r == -ENOENT)
1306 return 0;
1307 if (r < 0)
1308 return r;
1309
1310 for (;;) {
1311 pid_t pid;
1312
1313 /* libvirt / qemu uses threaded mode and cgroup.procs cannot be read at the lower levels.
1314 * From https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#threads,
1315 * “cgroup.procs” in a threaded domain cgroup contains the PIDs of all processes in
1316 * the subtree and is not readable in the subtree proper. */
1317 r = cg_read_pid(f, &pid);
1318 if (IN_SET(r, 0, -EOPNOTSUPP))
1319 break;
1320 if (r < 0)
1321 return r;
1322
1323 if (is_kernel_thread(pid) > 0)
1324 continue;
1325
1326 r = append_process(reply, p, pid, pids);
1327 if (r < 0)
1328 return r;
1329 }
1330
1331 r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, p, &d);
1332 if (r == -ENOENT)
1333 return 0;
1334 if (r < 0)
1335 return r;
1336
1337 for (;;) {
1338 _cleanup_free_ char *g = NULL, *j = NULL;
1339
1340 r = cg_read_subgroup(d, &g);
1341 if (r < 0)
1342 return r;
1343 if (r == 0)
1344 break;
1345
1346 j = path_join(empty_to_root(p), g);
1347 if (!j)
1348 return -ENOMEM;
1349
1350 r = append_cgroup(reply, j, pids);
1351 if (r < 0)
1352 return r;
1353 }
1354
1355 return 0;
1356 }
1357
1358 int bus_unit_method_get_processes(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1359 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1360 _cleanup_set_free_ Set *pids = NULL;
1361 Unit *u = userdata;
1362 pid_t pid;
1363 int r;
1364
1365 assert(message);
1366
1367 r = mac_selinux_unit_access_check(u, message, "status", error);
1368 if (r < 0)
1369 return r;
1370
1371 pids = set_new(NULL);
1372 if (!pids)
1373 return -ENOMEM;
1374
1375 r = sd_bus_message_new_method_return(message, &reply);
1376 if (r < 0)
1377 return r;
1378
1379 r = sd_bus_message_open_container(reply, 'a', "(sus)");
1380 if (r < 0)
1381 return r;
1382
1383 if (u->cgroup_path) {
1384 r = append_cgroup(reply, u->cgroup_path, pids);
1385 if (r < 0)
1386 return r;
1387 }
1388
1389 /* The main and control pids might live outside of the cgroup, hence fetch them separately */
1390 pid = unit_main_pid(u);
1391 if (pid > 0) {
1392 r = append_process(reply, NULL, pid, pids);
1393 if (r < 0)
1394 return r;
1395 }
1396
1397 pid = unit_control_pid(u);
1398 if (pid > 0) {
1399 r = append_process(reply, NULL, pid, pids);
1400 if (r < 0)
1401 return r;
1402 }
1403
1404 r = sd_bus_message_close_container(reply);
1405 if (r < 0)
1406 return r;
1407
1408 return sd_bus_send(NULL, reply, NULL);
1409 }
1410
1411 static int property_get_ip_counter(
1412 sd_bus *bus,
1413 const char *path,
1414 const char *interface,
1415 const char *property,
1416 sd_bus_message *reply,
1417 void *userdata,
1418 sd_bus_error *error) {
1419
1420 static const char *const table[_CGROUP_IP_ACCOUNTING_METRIC_MAX] = {
1421 [CGROUP_IP_INGRESS_BYTES] = "IPIngressBytes",
1422 [CGROUP_IP_EGRESS_BYTES] = "IPEgressBytes",
1423 [CGROUP_IP_INGRESS_PACKETS] = "IPIngressPackets",
1424 [CGROUP_IP_EGRESS_PACKETS] = "IPEgressPackets",
1425 };
1426
1427 uint64_t value = UINT64_MAX;
1428 Unit *u = userdata;
1429 ssize_t metric;
1430
1431 assert(bus);
1432 assert(reply);
1433 assert(property);
1434 assert(u);
1435
1436 assert_se((metric = string_table_lookup(table, ELEMENTSOF(table), property)) >= 0);
1437 (void) unit_get_ip_accounting(u, metric, &value);
1438 return sd_bus_message_append(reply, "t", value);
1439 }
1440
1441 static int property_get_io_counter(
1442 sd_bus *bus,
1443 const char *path,
1444 const char *interface,
1445 const char *property,
1446 sd_bus_message *reply,
1447 void *userdata,
1448 sd_bus_error *error) {
1449
1450 static const char *const table[_CGROUP_IO_ACCOUNTING_METRIC_MAX] = {
1451 [CGROUP_IO_READ_BYTES] = "IOReadBytes",
1452 [CGROUP_IO_WRITE_BYTES] = "IOWriteBytes",
1453 [CGROUP_IO_READ_OPERATIONS] = "IOReadOperations",
1454 [CGROUP_IO_WRITE_OPERATIONS] = "IOWriteOperations",
1455 };
1456
1457 uint64_t value = UINT64_MAX;
1458 Unit *u = userdata;
1459 ssize_t metric;
1460
1461 assert(bus);
1462 assert(reply);
1463 assert(property);
1464 assert(u);
1465
1466 assert_se((metric = string_table_lookup(table, ELEMENTSOF(table), property)) >= 0);
1467 (void) unit_get_io_accounting(u, metric, false, &value);
1468 return sd_bus_message_append(reply, "t", value);
1469 }
1470
1471 int bus_unit_method_attach_processes(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1472
1473 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1474 _cleanup_set_free_ Set *pids = NULL;
1475 Unit *u = userdata;
1476 const char *path;
1477 int r;
1478
1479 assert(message);
1480
1481 /* This migrates the processes with the specified PIDs into the cgroup of this unit, optionally below a
1482 * specified cgroup path. Obviously this only works for units that actually maintain a cgroup
1483 * representation. If a process is already in the cgroup no operation is executed – in this case the specified
1484 * subcgroup path has no effect! */
1485
1486 r = mac_selinux_unit_access_check(u, message, "start", error);
1487 if (r < 0)
1488 return r;
1489
1490 r = sd_bus_message_read(message, "s", &path);
1491 if (r < 0)
1492 return r;
1493
1494 path = empty_to_null(path);
1495 if (path) {
1496 if (!path_is_absolute(path))
1497 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Control group path is not absolute: %s", path);
1498
1499 if (!path_is_normalized(path))
1500 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Control group path is not normalized: %s", path);
1501 }
1502
1503 if (!unit_cgroup_delegate(u))
1504 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Process migration not available on non-delegated units.");
1505
1506 if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)))
1507 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Unit is not active, refusing.");
1508
1509 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
1510 if (r < 0)
1511 return r;
1512
1513 r = sd_bus_message_enter_container(message, 'a', "u");
1514 if (r < 0)
1515 return r;
1516 for (;;) {
1517 uid_t process_uid, sender_uid;
1518 uint32_t upid;
1519 pid_t pid;
1520
1521 r = sd_bus_message_read(message, "u", &upid);
1522 if (r < 0)
1523 return r;
1524 if (r == 0)
1525 break;
1526
1527 if (upid == 0) {
1528 r = sd_bus_creds_get_pid(creds, &pid);
1529 if (r < 0)
1530 return r;
1531 } else
1532 pid = (uid_t) upid;
1533
1534 /* Filter out duplicates */
1535 if (set_contains(pids, PID_TO_PTR(pid)))
1536 continue;
1537
1538 /* Check if this process is suitable for attaching to this unit */
1539 r = unit_pid_attachable(u, pid, error);
1540 if (r < 0)
1541 return r;
1542
1543 /* Let's query the sender's UID, so that we can make our security decisions */
1544 r = sd_bus_creds_get_euid(creds, &sender_uid);
1545 if (r < 0)
1546 return r;
1547
1548 /* Let's validate security: if the sender is root, then all is OK. If the sender is any other unit,
1549 * then the process' UID and the target unit's UID have to match the sender's UID */
1550 if (sender_uid != 0 && sender_uid != getuid()) {
1551 r = get_process_uid(pid, &process_uid);
1552 if (r < 0)
1553 return sd_bus_error_set_errnof(error, r, "Failed to retrieve process UID: %m");
1554
1555 if (process_uid != sender_uid)
1556 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Process " PID_FMT " not owned by client's UID. Refusing.", pid);
1557 if (process_uid != u->ref_uid)
1558 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Process " PID_FMT " not owned by target unit's UID. Refusing.", pid);
1559 }
1560
1561 if (!pids) {
1562 pids = set_new(NULL);
1563 if (!pids)
1564 return -ENOMEM;
1565 }
1566
1567 r = set_put(pids, PID_TO_PTR(pid));
1568 if (r < 0)
1569 return r;
1570 }
1571
1572 r = sd_bus_message_exit_container(message);
1573 if (r < 0)
1574 return r;
1575
1576 r = unit_attach_pids_to_cgroup(u, pids, path);
1577 if (r < 0)
1578 return sd_bus_error_set_errnof(error, r, "Failed to attach processes to control group: %m");
1579
1580 return sd_bus_reply_method_return(message, NULL);
1581 }
1582
1583 const sd_bus_vtable bus_unit_cgroup_vtable[] = {
1584 SD_BUS_VTABLE_START(0),
1585 SD_BUS_PROPERTY("Slice", "s", property_get_slice, 0, 0),
1586 SD_BUS_PROPERTY("ControlGroup", "s", property_get_cgroup, 0, 0),
1587 SD_BUS_PROPERTY("ControlGroupId", "t", NULL, offsetof(Unit, cgroup_id), 0),
1588 SD_BUS_PROPERTY("MemoryCurrent", "t", property_get_current_memory, 0, 0),
1589 SD_BUS_PROPERTY("MemoryAvailable", "t", property_get_available_memory, 0, 0),
1590 SD_BUS_PROPERTY("CPUUsageNSec", "t", property_get_cpu_usage, 0, 0),
1591 SD_BUS_PROPERTY("EffectiveCPUs", "ay", property_get_cpuset_cpus, 0, 0),
1592 SD_BUS_PROPERTY("EffectiveMemoryNodes", "ay", property_get_cpuset_mems, 0, 0),
1593 SD_BUS_PROPERTY("TasksCurrent", "t", property_get_current_tasks, 0, 0),
1594 SD_BUS_PROPERTY("IPIngressBytes", "t", property_get_ip_counter, 0, 0),
1595 SD_BUS_PROPERTY("IPIngressPackets", "t", property_get_ip_counter, 0, 0),
1596 SD_BUS_PROPERTY("IPEgressBytes", "t", property_get_ip_counter, 0, 0),
1597 SD_BUS_PROPERTY("IPEgressPackets", "t", property_get_ip_counter, 0, 0),
1598 SD_BUS_PROPERTY("IOReadBytes", "t", property_get_io_counter, 0, 0),
1599 SD_BUS_PROPERTY("IOReadOperations", "t", property_get_io_counter, 0, 0),
1600 SD_BUS_PROPERTY("IOWriteBytes", "t", property_get_io_counter, 0, 0),
1601 SD_BUS_PROPERTY("IOWriteOperations", "t", property_get_io_counter, 0, 0),
1602
1603 SD_BUS_METHOD_WITH_NAMES("GetProcesses",
1604 NULL,,
1605 "a(sus)",
1606 SD_BUS_PARAM(processes),
1607 bus_unit_method_get_processes,
1608 SD_BUS_VTABLE_UNPRIVILEGED),
1609
1610 SD_BUS_METHOD_WITH_NAMES("AttachProcesses",
1611 "sau",
1612 SD_BUS_PARAM(subcgroup)
1613 SD_BUS_PARAM(pids),
1614 NULL,,
1615 bus_unit_method_attach_processes,
1616 SD_BUS_VTABLE_UNPRIVILEGED),
1617
1618 SD_BUS_VTABLE_END
1619 };
1620
1621 static int send_new_signal(sd_bus *bus, void *userdata) {
1622 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1623 _cleanup_free_ char *p = NULL;
1624 Unit *u = userdata;
1625 int r;
1626
1627 assert(bus);
1628 assert(u);
1629
1630 p = unit_dbus_path(u);
1631 if (!p)
1632 return -ENOMEM;
1633
1634 r = sd_bus_message_new_signal(
1635 bus,
1636 &m,
1637 "/org/freedesktop/systemd1",
1638 "org.freedesktop.systemd1.Manager",
1639 "UnitNew");
1640 if (r < 0)
1641 return r;
1642
1643 r = sd_bus_message_append(m, "so", u->id, p);
1644 if (r < 0)
1645 return r;
1646
1647 return sd_bus_send(bus, m, NULL);
1648 }
1649
1650 static int send_changed_signal(sd_bus *bus, void *userdata) {
1651 _cleanup_free_ char *p = NULL;
1652 Unit *u = userdata;
1653 int r;
1654
1655 assert(bus);
1656 assert(u);
1657
1658 p = unit_dbus_path(u);
1659 if (!p)
1660 return -ENOMEM;
1661
1662 /* Send a properties changed signal. First for the specific
1663 * type, then for the generic unit. The clients may rely on
1664 * this order to get atomic behavior if needed. */
1665
1666 r = sd_bus_emit_properties_changed_strv(
1667 bus, p,
1668 unit_dbus_interface_from_type(u->type),
1669 NULL);
1670 if (r < 0)
1671 return r;
1672
1673 return sd_bus_emit_properties_changed_strv(
1674 bus, p,
1675 "org.freedesktop.systemd1.Unit",
1676 NULL);
1677 }
1678
1679 void bus_unit_send_change_signal(Unit *u) {
1680 int r;
1681 assert(u);
1682
1683 if (u->in_dbus_queue) {
1684 LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u);
1685 u->in_dbus_queue = false;
1686 }
1687
1688 if (!u->id)
1689 return;
1690
1691 r = bus_foreach_bus(u->manager, u->bus_track, u->sent_dbus_new_signal ? send_changed_signal : send_new_signal, u);
1692 if (r < 0)
1693 log_unit_debug_errno(u, r, "Failed to send unit change signal for %s: %m", u->id);
1694
1695 u->sent_dbus_new_signal = true;
1696 }
1697
1698 void bus_unit_send_pending_change_signal(Unit *u, bool including_new) {
1699
1700 /* Sends out any pending change signals, but only if they really are pending. This call is used when we are
1701 * about to change state in order to force out a PropertiesChanged signal beforehand if there was one pending
1702 * so that clients can follow the full state transition */
1703
1704 if (!u->in_dbus_queue) /* If not enqueued, don't bother */
1705 return;
1706
1707 if (!u->sent_dbus_new_signal && !including_new) /* If the unit was never announced, don't bother, it's fine if
1708 * the unit appears in the new state right-away (except if the
1709 * caller explicitly asked us to send it anyway) */
1710 return;
1711
1712 if (MANAGER_IS_RELOADING(u->manager)) /* Don't generate unnecessary PropertiesChanged signals for the same unit
1713 * when we are reloading. */
1714 return;
1715
1716 bus_unit_send_change_signal(u);
1717 }
1718
1719 int bus_unit_send_pending_freezer_message(Unit *u) {
1720 int r;
1721
1722 assert(u);
1723
1724 if (!u->pending_freezer_message)
1725 return 0;
1726
1727 r = sd_bus_send(NULL, u->pending_freezer_message, NULL);
1728 if (r < 0)
1729 log_warning_errno(r, "Failed to send queued message, ignoring: %m");
1730
1731 u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message);
1732
1733 return 0;
1734 }
1735
1736 static int send_removed_signal(sd_bus *bus, void *userdata) {
1737 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1738 _cleanup_free_ char *p = NULL;
1739 Unit *u = userdata;
1740 int r;
1741
1742 assert(bus);
1743 assert(u);
1744
1745 p = unit_dbus_path(u);
1746 if (!p)
1747 return -ENOMEM;
1748
1749 r = sd_bus_message_new_signal(
1750 bus,
1751 &m,
1752 "/org/freedesktop/systemd1",
1753 "org.freedesktop.systemd1.Manager",
1754 "UnitRemoved");
1755 if (r < 0)
1756 return r;
1757
1758 r = sd_bus_message_append(m, "so", u->id, p);
1759 if (r < 0)
1760 return r;
1761
1762 return sd_bus_send(bus, m, NULL);
1763 }
1764
1765 void bus_unit_send_removed_signal(Unit *u) {
1766 int r;
1767 assert(u);
1768
1769 if (!u->sent_dbus_new_signal || u->in_dbus_queue)
1770 bus_unit_send_change_signal(u);
1771
1772 if (!u->id)
1773 return;
1774
1775 r = bus_foreach_bus(u->manager, u->bus_track, send_removed_signal, u);
1776 if (r < 0)
1777 log_unit_debug_errno(u, r, "Failed to send unit remove signal for %s: %m", u->id);
1778 }
1779
1780 int bus_unit_queue_job_one(
1781 sd_bus_message *message,
1782 Unit *u,
1783 JobType type,
1784 JobMode mode,
1785 BusUnitQueueFlags flags,
1786 sd_bus_message *reply,
1787 sd_bus_error *error) {
1788
1789 _cleanup_set_free_ Set *affected = NULL;
1790 _cleanup_free_ char *job_path = NULL, *unit_path = NULL;
1791 Job *j, *a;
1792 int r;
1793
1794 if (FLAGS_SET(flags, BUS_UNIT_QUEUE_VERBOSE_REPLY)) {
1795 affected = set_new(NULL);
1796 if (!affected)
1797 return -ENOMEM;
1798 }
1799
1800 r = manager_add_job(u->manager, type, u, mode, affected, error, &j);
1801 if (r < 0)
1802 return r;
1803
1804 if (FLAGS_SET(flags, BUS_UNIT_QUEUE_RETURN_SKIP_ON_CONDITION_FAIL))
1805 j->return_skip_on_cond_failure = true;
1806
1807 r = bus_job_track_sender(j, message);
1808 if (r < 0)
1809 return r;
1810
1811 /* Before we send the method reply, force out the announcement JobNew for this job */
1812 bus_job_send_pending_change_signal(j, true);
1813
1814 job_path = job_dbus_path(j);
1815 if (!job_path)
1816 return -ENOMEM;
1817
1818 /* The classic response is just a job object path */
1819 if (!FLAGS_SET(flags, BUS_UNIT_QUEUE_VERBOSE_REPLY))
1820 return sd_bus_message_append(reply, "o", job_path);
1821
1822 /* In verbose mode respond with the anchor job plus everything that has been affected */
1823
1824 unit_path = unit_dbus_path(j->unit);
1825 if (!unit_path)
1826 return -ENOMEM;
1827
1828 r = sd_bus_message_append(reply, "uosos",
1829 j->id, job_path,
1830 j->unit->id, unit_path,
1831 job_type_to_string(j->type));
1832 if (r < 0)
1833 return r;
1834
1835 r = sd_bus_message_open_container(reply, 'a', "(uosos)");
1836 if (r < 0)
1837 return r;
1838
1839 SET_FOREACH(a, affected) {
1840 if (a->id == j->id)
1841 continue;
1842
1843 /* Free paths from previous iteration */
1844 job_path = mfree(job_path);
1845 unit_path = mfree(unit_path);
1846
1847 job_path = job_dbus_path(a);
1848 if (!job_path)
1849 return -ENOMEM;
1850
1851 unit_path = unit_dbus_path(a->unit);
1852 if (!unit_path)
1853 return -ENOMEM;
1854
1855 r = sd_bus_message_append(reply, "(uosos)",
1856 a->id, job_path,
1857 a->unit->id, unit_path,
1858 job_type_to_string(a->type));
1859 if (r < 0)
1860 return r;
1861 }
1862
1863 return sd_bus_message_close_container(reply);
1864 }
1865
1866 int bus_unit_queue_job(
1867 sd_bus_message *message,
1868 Unit *u,
1869 JobType type,
1870 JobMode mode,
1871 BusUnitQueueFlags flags,
1872 sd_bus_error *error) {
1873
1874 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1875 int r;
1876
1877 assert(message);
1878 assert(u);
1879 assert(type >= 0 && type < _JOB_TYPE_MAX);
1880 assert(mode >= 0 && mode < _JOB_MODE_MAX);
1881
1882 r = mac_selinux_unit_access_check(
1883 u, message,
1884 job_type_to_access_method(type),
1885 error);
1886 if (r < 0)
1887 return r;
1888
1889 if (FLAGS_SET(flags, BUS_UNIT_QUEUE_RELOAD_IF_POSSIBLE) && unit_can_reload(u)) {
1890 if (type == JOB_RESTART)
1891 type = JOB_RELOAD_OR_START;
1892 else if (type == JOB_TRY_RESTART)
1893 type = JOB_TRY_RELOAD;
1894 }
1895
1896 if (type == JOB_STOP &&
1897 IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_ERROR, UNIT_BAD_SETTING) &&
1898 unit_active_state(u) == UNIT_INACTIVE)
1899 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not loaded.", u->id);
1900
1901 if ((type == JOB_START && u->refuse_manual_start) ||
1902 (type == JOB_STOP && u->refuse_manual_stop) ||
1903 (IN_SET(type, JOB_RESTART, JOB_TRY_RESTART) && (u->refuse_manual_start || u->refuse_manual_stop)) ||
1904 (type == JOB_RELOAD_OR_START && job_type_collapse(type, u) == JOB_START && u->refuse_manual_start))
1905 return sd_bus_error_setf(error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, unit %s may be requested by dependency only (it is configured to refuse manual start/stop).", u->id);
1906
1907 r = sd_bus_message_new_method_return(message, &reply);
1908 if (r < 0)
1909 return r;
1910
1911 r = bus_unit_queue_job_one(message, u, type, mode, flags, reply, error);
1912 if (r < 0)
1913 return r;
1914
1915 return sd_bus_send(NULL, reply, NULL);
1916 }
1917
1918 static int bus_unit_set_live_property(
1919 Unit *u,
1920 const char *name,
1921 sd_bus_message *message,
1922 UnitWriteFlags flags,
1923 sd_bus_error *error) {
1924
1925 int r;
1926
1927 assert(u);
1928 assert(name);
1929 assert(message);
1930
1931 /* Handles setting properties both "live" (i.e. at any time during runtime), and during creation (for
1932 * transient units that are being created). */
1933
1934 if (streq(name, "Description")) {
1935 const char *d;
1936
1937 r = sd_bus_message_read(message, "s", &d);
1938 if (r < 0)
1939 return r;
1940
1941 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
1942 r = unit_set_description(u, d);
1943 if (r < 0)
1944 return r;
1945
1946 unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, "Description=%s", d);
1947 }
1948
1949 return 1;
1950 }
1951
1952 /* A setting that only applies to active units. We don't actually write this to /run, this state is
1953 * managed internally. "+foo" sets flag foo, "-foo" unsets flag foo, just "foo" resets flags to
1954 * foo. The last type cannot be mixed with "+" or "-". */
1955
1956 if (streq(name, "Markers")) {
1957 unsigned settings = 0, mask = 0;
1958 bool some_plus_minus = false, some_absolute = false;
1959
1960 r = sd_bus_message_enter_container(message, 'a', "s");
1961 if (r < 0)
1962 return r;
1963
1964 for (;;) {
1965 const char *word;
1966 bool b;
1967
1968 r = sd_bus_message_read(message, "s", &word);
1969 if (r < 0)
1970 return r;
1971 if (r == 0)
1972 break;
1973
1974 if (IN_SET(word[0], '+', '-')) {
1975 b = word[0] == '+';
1976 word++;
1977 some_plus_minus = true;
1978 } else {
1979 b = true;
1980 some_absolute = true;
1981 }
1982
1983 UnitMarker m = unit_marker_from_string(word);
1984 if (m < 0)
1985 return sd_bus_error_setf(error, BUS_ERROR_BAD_UNIT_SETTING,
1986 "Unknown marker \"%s\".", word);
1987
1988 SET_FLAG(settings, 1u << m, b);
1989 SET_FLAG(mask, 1u << m, true);
1990 }
1991
1992 r = sd_bus_message_exit_container(message);
1993 if (r < 0)
1994 return r;
1995
1996 if (some_plus_minus && some_absolute)
1997 return sd_bus_error_set(error, BUS_ERROR_BAD_UNIT_SETTING, "Bad marker syntax.");
1998
1999 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2000 if (some_absolute)
2001 u->markers = settings;
2002 else
2003 u->markers = settings | (u->markers & ~mask);
2004 }
2005
2006 return 1;
2007 }
2008
2009 return 0;
2010 }
2011
2012 static int bus_set_transient_emergency_action(
2013 Unit *u,
2014 const char *name,
2015 EmergencyAction *p,
2016 sd_bus_message *message,
2017 UnitWriteFlags flags,
2018 sd_bus_error *error) {
2019
2020 const char *s;
2021 EmergencyAction v;
2022 int r;
2023 bool system;
2024
2025 assert(p);
2026
2027 r = sd_bus_message_read(message, "s", &s);
2028 if (r < 0)
2029 return r;
2030
2031 system = MANAGER_IS_SYSTEM(u->manager);
2032 r = parse_emergency_action(s, system, &v);
2033 if (r < 0)
2034 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
2035 r == -EOPNOTSUPP ? "%s setting invalid for manager type: %s"
2036 : "Invalid %s setting: %s",
2037 name, s);
2038
2039 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2040 *p = v;
2041 unit_write_settingf(u, flags, name,
2042 "%s=%s", name, s);
2043 }
2044
2045 return 1;
2046 }
2047
2048 static int bus_set_transient_exit_status(
2049 Unit *u,
2050 const char *name,
2051 int *p,
2052 sd_bus_message *message,
2053 UnitWriteFlags flags,
2054 sd_bus_error *error) {
2055
2056 int32_t k;
2057 int r;
2058
2059 assert(p);
2060
2061 r = sd_bus_message_read(message, "i", &k);
2062 if (r < 0)
2063 return r;
2064
2065 if (k > 255)
2066 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Exit status must be in range 0…255 or negative.");
2067
2068 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2069 *p = k < 0 ? -1 : k;
2070
2071 if (k < 0)
2072 unit_write_settingf(u, flags, name, "%s=", name);
2073 else
2074 unit_write_settingf(u, flags, name, "%s=%i", name, k);
2075 }
2076
2077 return 1;
2078 }
2079
2080 static BUS_DEFINE_SET_TRANSIENT_PARSE(collect_mode, CollectMode, collect_mode_from_string);
2081 static BUS_DEFINE_SET_TRANSIENT_PARSE(job_mode, JobMode, job_mode_from_string);
2082
2083 static int bus_set_transient_conditions(
2084 Unit *u,
2085 const char *name,
2086 Condition **list,
2087 bool is_condition,
2088 sd_bus_message *message,
2089 UnitWriteFlags flags,
2090 sd_bus_error *error) {
2091
2092 const char *type_name, *param;
2093 int trigger, negate, r;
2094 bool empty = true;
2095
2096 assert(list);
2097
2098 r = sd_bus_message_enter_container(message, 'a', "(sbbs)");
2099 if (r < 0)
2100 return r;
2101
2102 while ((r = sd_bus_message_read(message, "(sbbs)", &type_name, &trigger, &negate, &param)) > 0) {
2103 ConditionType t;
2104
2105 t = is_condition ? condition_type_from_string(type_name) : assert_type_from_string(type_name);
2106 if (t < 0)
2107 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid condition type: %s", type_name);
2108
2109 if (isempty(param))
2110 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Condition parameter in %s is empty", type_name);
2111
2112 if (condition_takes_path(t) && !path_is_absolute(param))
2113 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path in condition %s is not absolute: %s", type_name, param);
2114
2115 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2116 Condition *c;
2117
2118 c = condition_new(t, param, trigger, negate);
2119 if (!c)
2120 return -ENOMEM;
2121
2122 LIST_PREPEND(conditions, *list, c);
2123
2124 unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name,
2125 "%s=%s%s%s", type_name,
2126 trigger ? "|" : "", negate ? "!" : "", param);
2127 }
2128
2129 empty = false;
2130 }
2131 if (r < 0)
2132 return r;
2133
2134 r = sd_bus_message_exit_container(message);
2135 if (r < 0)
2136 return r;
2137
2138 if (!UNIT_WRITE_FLAGS_NOOP(flags) && empty) {
2139 *list = condition_free_list(*list);
2140 unit_write_settingf(u, flags, name, "%sNull=", is_condition ? "Condition" : "Assert");
2141 }
2142
2143 return 1;
2144 }
2145
2146 static int bus_unit_set_transient_property(
2147 Unit *u,
2148 const char *name,
2149 sd_bus_message *message,
2150 UnitWriteFlags flags,
2151 sd_bus_error *error) {
2152
2153 UnitDependency d;
2154 int r;
2155
2156 assert(u);
2157 assert(name);
2158 assert(message);
2159
2160 /* Handles settings when transient units are created. This settings cannot be altered anymore after
2161 * the unit has been created. */
2162
2163 if (streq(name, "SourcePath"))
2164 return bus_set_transient_path(u, name, &u->source_path, message, flags, error);
2165
2166 if (streq(name, "StopWhenUnneeded"))
2167 return bus_set_transient_bool(u, name, &u->stop_when_unneeded, message, flags, error);
2168
2169 if (streq(name, "RefuseManualStart"))
2170 return bus_set_transient_bool(u, name, &u->refuse_manual_start, message, flags, error);
2171
2172 if (streq(name, "RefuseManualStop"))
2173 return bus_set_transient_bool(u, name, &u->refuse_manual_stop, message, flags, error);
2174
2175 if (streq(name, "AllowIsolate"))
2176 return bus_set_transient_bool(u, name, &u->allow_isolate, message, flags, error);
2177
2178 if (streq(name, "DefaultDependencies"))
2179 return bus_set_transient_bool(u, name, &u->default_dependencies, message, flags, error);
2180
2181 if (streq(name, "OnSuccessJobMode"))
2182 return bus_set_transient_job_mode(u, name, &u->on_success_job_mode, message, flags, error);
2183
2184 if (streq(name, "OnFailureJobMode"))
2185 return bus_set_transient_job_mode(u, name, &u->on_failure_job_mode, message, flags, error);
2186
2187 if (streq(name, "IgnoreOnIsolate"))
2188 return bus_set_transient_bool(u, name, &u->ignore_on_isolate, message, flags, error);
2189
2190 if (streq(name, "JobTimeoutUSec")) {
2191 r = bus_set_transient_usec_fix_0(u, name, &u->job_timeout, message, flags, error);
2192 if (r >= 0 && !UNIT_WRITE_FLAGS_NOOP(flags) && !u->job_running_timeout_set)
2193 u->job_running_timeout = u->job_timeout;
2194 }
2195
2196 if (streq(name, "JobRunningTimeoutUSec")) {
2197 r = bus_set_transient_usec_fix_0(u, name, &u->job_running_timeout, message, flags, error);
2198 if (r >= 0 && !UNIT_WRITE_FLAGS_NOOP(flags))
2199 u->job_running_timeout_set = true;
2200
2201 return r;
2202 }
2203
2204 if (streq(name, "JobTimeoutAction"))
2205 return bus_set_transient_emergency_action(u, name, &u->job_timeout_action, message, flags, error);
2206
2207 if (streq(name, "JobTimeoutRebootArgument"))
2208 return bus_set_transient_string(u, name, &u->job_timeout_reboot_arg, message, flags, error);
2209
2210 if (streq(name, "StartLimitIntervalUSec"))
2211 return bus_set_transient_usec(u, name, &u->start_ratelimit.interval, message, flags, error);
2212
2213 if (streq(name, "StartLimitBurst"))
2214 return bus_set_transient_unsigned(u, name, &u->start_ratelimit.burst, message, flags, error);
2215
2216 if (streq(name, "StartLimitAction"))
2217 return bus_set_transient_emergency_action(u, name, &u->start_limit_action, message, flags, error);
2218
2219 if (streq(name, "FailureAction"))
2220 return bus_set_transient_emergency_action(u, name, &u->failure_action, message, flags, error);
2221
2222 if (streq(name, "SuccessAction"))
2223 return bus_set_transient_emergency_action(u, name, &u->success_action, message, flags, error);
2224
2225 if (streq(name, "FailureActionExitStatus"))
2226 return bus_set_transient_exit_status(u, name, &u->failure_action_exit_status, message, flags, error);
2227
2228 if (streq(name, "SuccessActionExitStatus"))
2229 return bus_set_transient_exit_status(u, name, &u->success_action_exit_status, message, flags, error);
2230
2231 if (streq(name, "RebootArgument"))
2232 return bus_set_transient_string(u, name, &u->reboot_arg, message, flags, error);
2233
2234 if (streq(name, "CollectMode"))
2235 return bus_set_transient_collect_mode(u, name, &u->collect_mode, message, flags, error);
2236
2237 if (streq(name, "Conditions"))
2238 return bus_set_transient_conditions(u, name, &u->conditions, true, message, flags, error);
2239
2240 if (streq(name, "Asserts"))
2241 return bus_set_transient_conditions(u, name, &u->asserts, false, message, flags, error);
2242
2243 if (streq(name, "Documentation")) {
2244 _cleanup_strv_free_ char **l = NULL;
2245
2246 r = sd_bus_message_read_strv(message, &l);
2247 if (r < 0)
2248 return r;
2249
2250 STRV_FOREACH(p, l)
2251 if (!documentation_url_is_valid(*p))
2252 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid URL in %s: %s", name, *p);
2253
2254 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2255 if (strv_isempty(l)) {
2256 u->documentation = strv_free(u->documentation);
2257 unit_write_settingf(u, flags, name, "%s=", name);
2258 } else {
2259 strv_extend_strv(&u->documentation, l, false);
2260
2261 STRV_FOREACH(p, l)
2262 unit_write_settingf(u, flags, name, "%s=%s", name, *p);
2263 }
2264 }
2265
2266 return 1;
2267
2268 } else if (streq(name, "Slice")) {
2269 Unit *slice;
2270 const char *s;
2271
2272 if (!UNIT_HAS_CGROUP_CONTEXT(u))
2273 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "The slice property is only available for units with control groups.");
2274 if (u->type == UNIT_SLICE)
2275 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Slice may not be set for slice units.");
2276 if (unit_has_name(u, SPECIAL_INIT_SCOPE))
2277 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot set slice for init.scope");
2278
2279 r = sd_bus_message_read(message, "s", &s);
2280 if (r < 0)
2281 return r;
2282
2283 if (!unit_name_is_valid(s, UNIT_NAME_PLAIN))
2284 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name '%s'", s);
2285
2286 /* Note that we do not dispatch the load queue here yet, as we don't want our own transient unit to be
2287 * loaded while we are still setting it up. Or in other words, we use manager_load_unit_prepare()
2288 * instead of manager_load_unit() on purpose, here. */
2289 r = manager_load_unit_prepare(u->manager, s, NULL, error, &slice);
2290 if (r < 0)
2291 return r;
2292
2293 if (slice->type != UNIT_SLICE)
2294 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unit name '%s' is not a slice", s);
2295
2296 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2297 r = unit_set_slice(u, slice);
2298 if (r < 0)
2299 return r;
2300
2301 unit_write_settingf(u, flags|UNIT_PRIVATE, name, "Slice=%s", s);
2302 }
2303
2304 return 1;
2305
2306 } else if (streq(name, "RequiresMountsFor")) {
2307 _cleanup_strv_free_ char **l = NULL;
2308
2309 r = sd_bus_message_read_strv(message, &l);
2310 if (r < 0)
2311 return r;
2312
2313 STRV_FOREACH(p, l) {
2314 path_simplify(*p);
2315
2316 if (!path_is_absolute(*p))
2317 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path specified in %s is not absolute: %s", name, *p);
2318
2319 if (!path_is_valid(*p))
2320 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path specified in %s has invalid length: %s", name, *p);
2321
2322 if (!path_is_normalized(*p))
2323 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path specified in %s is not normalized: %s", name, *p);
2324
2325 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2326 r = unit_require_mounts_for(u, *p, UNIT_DEPENDENCY_FILE);
2327 if (r < 0)
2328 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Failed to add required mount \"%s\": %m", *p);
2329
2330 unit_write_settingf(u, flags, name, "%s=%s", name, *p);
2331 }
2332 }
2333
2334 return 1;
2335 }
2336
2337 if (streq(name, "RequiresOverridable"))
2338 d = UNIT_REQUIRES; /* redirect for obsolete unit dependency type */
2339 else if (streq(name, "RequisiteOverridable"))
2340 d = UNIT_REQUISITE; /* same here */
2341 else
2342 d = unit_dependency_from_string(name);
2343
2344 if (d >= 0) {
2345 const char *other;
2346
2347 if (!IN_SET(d,
2348 UNIT_REQUIRES,
2349 UNIT_REQUISITE,
2350 UNIT_WANTS,
2351 UNIT_BINDS_TO,
2352 UNIT_PART_OF,
2353 UNIT_UPHOLDS,
2354 UNIT_CONFLICTS,
2355 UNIT_BEFORE,
2356 UNIT_AFTER,
2357 UNIT_ON_SUCCESS,
2358 UNIT_ON_FAILURE,
2359 UNIT_PROPAGATES_RELOAD_TO,
2360 UNIT_RELOAD_PROPAGATED_FROM,
2361 UNIT_PROPAGATES_STOP_TO,
2362 UNIT_STOP_PROPAGATED_FROM,
2363 UNIT_JOINS_NAMESPACE_OF))
2364 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Dependency type %s may not be created transiently.", unit_dependency_to_string(d));
2365
2366 r = sd_bus_message_enter_container(message, 'a', "s");
2367 if (r < 0)
2368 return r;
2369
2370 while ((r = sd_bus_message_read(message, "s", &other)) > 0) {
2371 if (!unit_name_is_valid(other, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE))
2372 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name %s", other);
2373
2374 if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
2375 _cleanup_free_ char *label = NULL;
2376
2377 r = unit_add_dependency_by_name(u, d, other, true, UNIT_DEPENDENCY_FILE);
2378 if (r < 0)
2379 return r;
2380
2381 label = strjoin(name, "-", other);
2382 if (!label)
2383 return -ENOMEM;
2384
2385 unit_write_settingf(u, flags, label, "%s=%s", unit_dependency_to_string(d), other);
2386 }
2387
2388 }
2389 if (r < 0)
2390 return r;
2391
2392 r = sd_bus_message_exit_container(message);
2393 if (r < 0)
2394 return r;
2395
2396 return 1;
2397
2398 } else if (streq(name, "AddRef")) {
2399
2400 int b;
2401
2402 /* Why is this called "AddRef" rather than just "Ref", or "Reference"? There's already a "Ref()" method
2403 * on the Unit interface, and it's probably not a good idea to expose a property and a method on the
2404 * same interface (well, strictly speaking AddRef isn't exposed as full property, we just read it for
2405 * transient units, but still). And "References" and "ReferencedBy" is already used as unit reference
2406 * dependency type, hence let's not confuse things with that.
2407 *
2408 * Note that we don't actually add the reference to the bus track. We do that only after the setup of
2409 * the transient unit is complete, so that setting this property multiple times in the same transient
2410 * unit creation call doesn't count as individual references. */
2411
2412 r = sd_bus_message_read(message, "b", &b);
2413 if (r < 0)
2414 return r;
2415
2416 if (!UNIT_WRITE_FLAGS_NOOP(flags))
2417 u->bus_track_add = b;
2418
2419 return 1;
2420 }
2421
2422 return 0;
2423 }
2424
2425 int bus_unit_set_properties(
2426 Unit *u,
2427 sd_bus_message *message,
2428 UnitWriteFlags flags,
2429 bool commit,
2430 sd_bus_error *error) {
2431
2432 bool for_real = false;
2433 unsigned n = 0;
2434 int r;
2435
2436 assert(u);
2437 assert(message);
2438
2439 /* We iterate through the array twice. First run we just check
2440 * if all passed data is valid, second run actually applies
2441 * it. This is to implement transaction-like behaviour without
2442 * actually providing full transactions. */
2443
2444 r = sd_bus_message_enter_container(message, 'a', "(sv)");
2445 if (r < 0)
2446 return r;
2447
2448 for (;;) {
2449 const char *name;
2450 UnitWriteFlags f;
2451
2452 r = sd_bus_message_enter_container(message, 'r', "sv");
2453 if (r < 0)
2454 return r;
2455 if (r == 0) {
2456 if (for_real || UNIT_WRITE_FLAGS_NOOP(flags))
2457 break;
2458
2459 /* Reached EOF. Let's try again, and this time for realz... */
2460 r = sd_bus_message_rewind(message, false);
2461 if (r < 0)
2462 return r;
2463
2464 for_real = true;
2465 continue;
2466 }
2467
2468 r = sd_bus_message_read(message, "s", &name);
2469 if (r < 0)
2470 return r;
2471
2472 if (!UNIT_VTABLE(u)->bus_set_property)
2473 return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY,
2474 "Objects of this type do not support setting properties.");
2475
2476 r = sd_bus_message_enter_container(message, 'v', NULL);
2477 if (r < 0)
2478 return r;
2479
2480 /* If not for real, then mask out the two target flags */
2481 f = for_real ? flags : (flags & ~(UNIT_RUNTIME|UNIT_PERSISTENT));
2482
2483 r = UNIT_VTABLE(u)->bus_set_property(u, name, message, f, error);
2484 if (r == 0 && u->transient && u->load_state == UNIT_STUB)
2485 r = bus_unit_set_transient_property(u, name, message, f, error);
2486 if (r == 0)
2487 r = bus_unit_set_live_property(u, name, message, f, error);
2488 if (r < 0)
2489 return r;
2490
2491 if (r == 0)
2492 return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY,
2493 "Cannot set property %s, or unknown property.", name);
2494
2495 r = sd_bus_message_exit_container(message);
2496 if (r < 0)
2497 return r;
2498
2499 r = sd_bus_message_exit_container(message);
2500 if (r < 0)
2501 return r;
2502
2503 n += for_real;
2504 }
2505
2506 r = sd_bus_message_exit_container(message);
2507 if (r < 0)
2508 return r;
2509
2510 if (commit && n > 0 && UNIT_VTABLE(u)->bus_commit_properties)
2511 UNIT_VTABLE(u)->bus_commit_properties(u);
2512
2513 return n;
2514 }
2515
2516 int bus_unit_validate_load_state(Unit *u, sd_bus_error *error) {
2517 assert(u);
2518
2519 /* Generates a pretty error if a unit isn't properly loaded. */
2520
2521 switch (u->load_state) {
2522
2523 case UNIT_LOADED:
2524 return 0;
2525
2526 case UNIT_NOT_FOUND:
2527 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not found.", u->id);
2528
2529 case UNIT_BAD_SETTING:
2530 return sd_bus_error_setf(error, BUS_ERROR_BAD_UNIT_SETTING, "Unit %s has a bad unit file setting.", u->id);
2531
2532 case UNIT_ERROR: /* Only show .load_error in UNIT_ERROR state */
2533 return sd_bus_error_set_errnof(error, u->load_error,
2534 "Unit %s failed to load properly, please adjust/correct and reload service manager: %m", u->id);
2535
2536 case UNIT_MASKED:
2537 return sd_bus_error_setf(error, BUS_ERROR_UNIT_MASKED, "Unit %s is masked.", u->id);
2538
2539 case UNIT_STUB:
2540 case UNIT_MERGED:
2541 default:
2542 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unexpected load state of unit %s", u->id);
2543 }
2544 }
2545
2546 static int bus_unit_track_handler(sd_bus_track *t, void *userdata) {
2547 Unit *u = userdata;
2548
2549 assert(t);
2550 assert(u);
2551
2552 u->bus_track = sd_bus_track_unref(u->bus_track); /* make sure we aren't called again */
2553
2554 /* If the client that tracks us disappeared, then there's reason to believe that the cgroup is empty now too,
2555 * let's see */
2556 unit_add_to_cgroup_empty_queue(u);
2557
2558 /* Also add the unit to the GC queue, after all if the client left it might be time to GC this unit */
2559 unit_add_to_gc_queue(u);
2560
2561 return 0;
2562 }
2563
2564 static int bus_unit_allocate_bus_track(Unit *u) {
2565 int r;
2566
2567 assert(u);
2568
2569 if (u->bus_track)
2570 return 0;
2571
2572 r = sd_bus_track_new(u->manager->api_bus, &u->bus_track, bus_unit_track_handler, u);
2573 if (r < 0)
2574 return r;
2575
2576 r = sd_bus_track_set_recursive(u->bus_track, true);
2577 if (r < 0) {
2578 u->bus_track = sd_bus_track_unref(u->bus_track);
2579 return r;
2580 }
2581
2582 return 0;
2583 }
2584
2585 int bus_unit_track_add_name(Unit *u, const char *name) {
2586 int r;
2587
2588 assert(u);
2589
2590 r = bus_unit_allocate_bus_track(u);
2591 if (r < 0)
2592 return r;
2593
2594 return sd_bus_track_add_name(u->bus_track, name);
2595 }
2596
2597 int bus_unit_track_add_sender(Unit *u, sd_bus_message *m) {
2598 int r;
2599
2600 assert(u);
2601
2602 r = bus_unit_allocate_bus_track(u);
2603 if (r < 0)
2604 return r;
2605
2606 return sd_bus_track_add_sender(u->bus_track, m);
2607 }
2608
2609 int bus_unit_track_remove_sender(Unit *u, sd_bus_message *m) {
2610 assert(u);
2611
2612 /* If we haven't allocated the bus track object yet, then there's definitely no reference taken yet,
2613 * return an error */
2614 if (!u->bus_track)
2615 return -EUNATCH;
2616
2617 return sd_bus_track_remove_sender(u->bus_track, m);
2618 }
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