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1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ | |
2 | ||
3 | #include <errno.h> | |
4 | #include <unistd.h> | |
5 | ||
6 | #include "alloc-util.h" | |
7 | #include "dbus-scope.h" | |
8 | #include "dbus-unit.h" | |
9 | #include "load-dropin.h" | |
10 | #include "log.h" | |
11 | #include "process-util.h" | |
12 | #include "scope.h" | |
13 | #include "serialize.h" | |
14 | #include "special.h" | |
15 | #include "string-table.h" | |
16 | #include "string-util.h" | |
17 | #include "strv.h" | |
18 | #include "unit-name.h" | |
19 | #include "unit.h" | |
20 | ||
21 | static const UnitActiveState state_translation_table[_SCOPE_STATE_MAX] = { | |
22 | [SCOPE_DEAD] = UNIT_INACTIVE, | |
23 | [SCOPE_RUNNING] = UNIT_ACTIVE, | |
24 | [SCOPE_ABANDONED] = UNIT_ACTIVE, | |
25 | [SCOPE_STOP_SIGTERM] = UNIT_DEACTIVATING, | |
26 | [SCOPE_STOP_SIGKILL] = UNIT_DEACTIVATING, | |
27 | [SCOPE_FAILED] = UNIT_FAILED | |
28 | }; | |
29 | ||
30 | static int scope_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); | |
31 | ||
32 | static void scope_init(Unit *u) { | |
33 | Scope *s = SCOPE(u); | |
34 | ||
35 | assert(u); | |
36 | assert(u->load_state == UNIT_STUB); | |
37 | ||
38 | s->runtime_max_usec = USEC_INFINITY; | |
39 | s->timeout_stop_usec = u->manager->default_timeout_stop_usec; | |
40 | u->ignore_on_isolate = true; | |
41 | } | |
42 | ||
43 | static void scope_done(Unit *u) { | |
44 | Scope *s = SCOPE(u); | |
45 | ||
46 | assert(u); | |
47 | ||
48 | s->controller = mfree(s->controller); | |
49 | s->controller_track = sd_bus_track_unref(s->controller_track); | |
50 | ||
51 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
52 | } | |
53 | ||
54 | static int scope_arm_timer(Scope *s, usec_t usec) { | |
55 | int r; | |
56 | ||
57 | assert(s); | |
58 | ||
59 | if (s->timer_event_source) { | |
60 | r = sd_event_source_set_time(s->timer_event_source, usec); | |
61 | if (r < 0) | |
62 | return r; | |
63 | ||
64 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
65 | } | |
66 | ||
67 | if (usec == USEC_INFINITY) | |
68 | return 0; | |
69 | ||
70 | r = sd_event_add_time( | |
71 | UNIT(s)->manager->event, | |
72 | &s->timer_event_source, | |
73 | CLOCK_MONOTONIC, | |
74 | usec, 0, | |
75 | scope_dispatch_timer, s); | |
76 | if (r < 0) | |
77 | return r; | |
78 | ||
79 | (void) sd_event_source_set_description(s->timer_event_source, "scope-timer"); | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
84 | static void scope_set_state(Scope *s, ScopeState state) { | |
85 | ScopeState old_state; | |
86 | assert(s); | |
87 | ||
88 | if (s->state != state) | |
89 | bus_unit_send_pending_change_signal(UNIT(s), false); | |
90 | ||
91 | old_state = s->state; | |
92 | s->state = state; | |
93 | ||
94 | if (!IN_SET(state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) | |
95 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
96 | ||
97 | if (IN_SET(state, SCOPE_DEAD, SCOPE_FAILED)) { | |
98 | unit_unwatch_all_pids(UNIT(s)); | |
99 | unit_dequeue_rewatch_pids(UNIT(s)); | |
100 | } | |
101 | ||
102 | if (state != old_state) | |
103 | log_debug("%s changed %s -> %s", UNIT(s)->id, scope_state_to_string(old_state), scope_state_to_string(state)); | |
104 | ||
105 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], 0); | |
106 | } | |
107 | ||
108 | static int scope_add_default_dependencies(Scope *s) { | |
109 | int r; | |
110 | ||
111 | assert(s); | |
112 | ||
113 | if (!UNIT(s)->default_dependencies) | |
114 | return 0; | |
115 | ||
116 | /* Make sure scopes are unloaded on shutdown */ | |
117 | r = unit_add_two_dependencies_by_name( | |
118 | UNIT(s), | |
119 | UNIT_BEFORE, UNIT_CONFLICTS, | |
120 | SPECIAL_SHUTDOWN_TARGET, true, | |
121 | UNIT_DEPENDENCY_DEFAULT); | |
122 | if (r < 0) | |
123 | return r; | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
128 | static int scope_verify(Scope *s) { | |
129 | assert(s); | |
130 | assert(UNIT(s)->load_state == UNIT_LOADED); | |
131 | ||
132 | if (set_isempty(UNIT(s)->pids) && | |
133 | !MANAGER_IS_RELOADING(UNIT(s)->manager) && | |
134 | !unit_has_name(UNIT(s), SPECIAL_INIT_SCOPE)) | |
135 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOENT), "Scope has no PIDs. Refusing."); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static int scope_load_init_scope(Unit *u) { | |
141 | assert(u); | |
142 | ||
143 | if (!unit_has_name(u, SPECIAL_INIT_SCOPE)) | |
144 | return 0; | |
145 | ||
146 | u->transient = true; | |
147 | u->perpetual = true; | |
148 | ||
149 | /* init.scope is a bit special, as it has to stick around forever. Because of its special semantics we | |
150 | * synthesize it here, instead of relying on the unit file on disk. */ | |
151 | ||
152 | u->default_dependencies = false; | |
153 | ||
154 | /* Prettify things, if we can. */ | |
155 | if (!u->description) | |
156 | u->description = strdup("System and Service Manager"); | |
157 | if (!u->documentation) | |
158 | (void) strv_extend(&u->documentation, "man:systemd(1)"); | |
159 | ||
160 | return 1; | |
161 | } | |
162 | ||
163 | static int scope_add_extras(Scope *s) { | |
164 | int r; | |
165 | ||
166 | r = unit_patch_contexts(UNIT(s)); | |
167 | if (r < 0) | |
168 | return r; | |
169 | ||
170 | r = unit_set_default_slice(UNIT(s)); | |
171 | if (r < 0) | |
172 | return r; | |
173 | ||
174 | return scope_add_default_dependencies(s); | |
175 | } | |
176 | ||
177 | static int scope_load(Unit *u) { | |
178 | Scope *s = SCOPE(u); | |
179 | int r; | |
180 | ||
181 | assert(s); | |
182 | assert(u->load_state == UNIT_STUB); | |
183 | ||
184 | if (!u->transient && !MANAGER_IS_RELOADING(u->manager)) | |
185 | /* Refuse to load non-transient scope units, but allow them while reloading. */ | |
186 | return -ENOENT; | |
187 | ||
188 | r = scope_load_init_scope(u); | |
189 | if (r < 0) | |
190 | return r; | |
191 | ||
192 | r = unit_load_fragment_and_dropin(u, false); | |
193 | if (r < 0) | |
194 | return r; | |
195 | ||
196 | if (u->load_state != UNIT_LOADED) | |
197 | return 0; | |
198 | ||
199 | r = scope_add_extras(s); | |
200 | if (r < 0) | |
201 | return r; | |
202 | ||
203 | return scope_verify(s); | |
204 | } | |
205 | ||
206 | static usec_t scope_coldplug_timeout(Scope *s) { | |
207 | assert(s); | |
208 | ||
209 | switch (s->deserialized_state) { | |
210 | ||
211 | case SCOPE_RUNNING: | |
212 | return usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec); | |
213 | ||
214 | case SCOPE_STOP_SIGKILL: | |
215 | case SCOPE_STOP_SIGTERM: | |
216 | return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec); | |
217 | ||
218 | default: | |
219 | return USEC_INFINITY; | |
220 | } | |
221 | } | |
222 | ||
223 | static int scope_coldplug(Unit *u) { | |
224 | Scope *s = SCOPE(u); | |
225 | int r; | |
226 | ||
227 | assert(s); | |
228 | assert(s->state == SCOPE_DEAD); | |
229 | ||
230 | if (s->deserialized_state == s->state) | |
231 | return 0; | |
232 | ||
233 | r = scope_arm_timer(s, scope_coldplug_timeout(s)); | |
234 | if (r < 0) | |
235 | return r; | |
236 | ||
237 | if (!IN_SET(s->deserialized_state, SCOPE_DEAD, SCOPE_FAILED)) { | |
238 | if (u->pids) { | |
239 | void *pidp; | |
240 | ||
241 | SET_FOREACH(pidp, u->pids) { | |
242 | r = unit_watch_pid(u, PTR_TO_PID(pidp), false); | |
243 | if (r < 0 && r != -EEXIST) | |
244 | return r; | |
245 | } | |
246 | } else | |
247 | (void) unit_enqueue_rewatch_pids(u); | |
248 | } | |
249 | ||
250 | bus_scope_track_controller(s); | |
251 | ||
252 | scope_set_state(s, s->deserialized_state); | |
253 | return 0; | |
254 | } | |
255 | ||
256 | static void scope_dump(Unit *u, FILE *f, const char *prefix) { | |
257 | Scope *s = SCOPE(u); | |
258 | char buf_runtime[FORMAT_TIMESPAN_MAX]; | |
259 | ||
260 | assert(s); | |
261 | assert(f); | |
262 | ||
263 | fprintf(f, | |
264 | "%sScope State: %s\n" | |
265 | "%sResult: %s\n" | |
266 | "%sRuntimeMaxSec: %s\n", | |
267 | prefix, scope_state_to_string(s->state), | |
268 | prefix, scope_result_to_string(s->result), | |
269 | prefix, format_timespan(buf_runtime, sizeof(buf_runtime), s->runtime_max_usec, USEC_PER_SEC)); | |
270 | ||
271 | cgroup_context_dump(UNIT(s), f, prefix); | |
272 | kill_context_dump(&s->kill_context, f, prefix); | |
273 | } | |
274 | ||
275 | static void scope_enter_dead(Scope *s, ScopeResult f) { | |
276 | assert(s); | |
277 | ||
278 | if (s->result == SCOPE_SUCCESS) | |
279 | s->result = f; | |
280 | ||
281 | unit_log_result(UNIT(s), s->result == SCOPE_SUCCESS, scope_result_to_string(s->result)); | |
282 | scope_set_state(s, s->result != SCOPE_SUCCESS ? SCOPE_FAILED : SCOPE_DEAD); | |
283 | } | |
284 | ||
285 | static void scope_enter_signal(Scope *s, ScopeState state, ScopeResult f) { | |
286 | bool skip_signal = false; | |
287 | int r; | |
288 | ||
289 | assert(s); | |
290 | ||
291 | if (s->result == SCOPE_SUCCESS) | |
292 | s->result = f; | |
293 | ||
294 | /* Before sending any signal, make sure we track all members of this cgroup */ | |
295 | (void) unit_watch_all_pids(UNIT(s)); | |
296 | ||
297 | /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have | |
298 | * died now */ | |
299 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
300 | ||
301 | /* If we have a controller set let's ask the controller nicely to terminate the scope, instead of us going | |
302 | * directly into SIGTERM berserk mode */ | |
303 | if (state == SCOPE_STOP_SIGTERM) | |
304 | skip_signal = bus_scope_send_request_stop(s) > 0; | |
305 | ||
306 | if (skip_signal) | |
307 | r = 1; /* wait */ | |
308 | else { | |
309 | r = unit_kill_context( | |
310 | UNIT(s), | |
311 | &s->kill_context, | |
312 | state != SCOPE_STOP_SIGTERM ? KILL_KILL : | |
313 | s->was_abandoned ? KILL_TERMINATE_AND_LOG : | |
314 | KILL_TERMINATE, | |
315 | -1, -1, false); | |
316 | if (r < 0) | |
317 | goto fail; | |
318 | } | |
319 | ||
320 | if (r > 0) { | |
321 | r = scope_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec)); | |
322 | if (r < 0) | |
323 | goto fail; | |
324 | ||
325 | scope_set_state(s, state); | |
326 | } else if (state == SCOPE_STOP_SIGTERM) | |
327 | scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_SUCCESS); | |
328 | else | |
329 | scope_enter_dead(s, SCOPE_SUCCESS); | |
330 | ||
331 | return; | |
332 | ||
333 | fail: | |
334 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); | |
335 | ||
336 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); | |
337 | } | |
338 | ||
339 | static int scope_start(Unit *u) { | |
340 | Scope *s = SCOPE(u); | |
341 | int r; | |
342 | ||
343 | assert(s); | |
344 | ||
345 | if (unit_has_name(u, SPECIAL_INIT_SCOPE)) | |
346 | return -EPERM; | |
347 | ||
348 | if (s->state == SCOPE_FAILED) | |
349 | return -EPERM; | |
350 | ||
351 | /* We can't fulfill this right now, please try again later */ | |
352 | if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) | |
353 | return -EAGAIN; | |
354 | ||
355 | assert(s->state == SCOPE_DEAD); | |
356 | ||
357 | if (!u->transient && !MANAGER_IS_RELOADING(u->manager)) | |
358 | return -ENOENT; | |
359 | ||
360 | (void) bus_scope_track_controller(s); | |
361 | ||
362 | r = unit_acquire_invocation_id(u); | |
363 | if (r < 0) | |
364 | return r; | |
365 | ||
366 | (void) unit_realize_cgroup(u); | |
367 | (void) unit_reset_accounting(u); | |
368 | ||
369 | unit_export_state_files(u); | |
370 | ||
371 | r = unit_attach_pids_to_cgroup(u, u->pids, NULL); | |
372 | if (r < 0) { | |
373 | log_unit_warning_errno(u, r, "Failed to add PIDs to scope's control group: %m"); | |
374 | scope_enter_dead(s, SCOPE_FAILURE_RESOURCES); | |
375 | return r; | |
376 | } | |
377 | ||
378 | s->result = SCOPE_SUCCESS; | |
379 | ||
380 | scope_set_state(s, SCOPE_RUNNING); | |
381 | ||
382 | /* Set the maximum runtime timeout. */ | |
383 | scope_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec)); | |
384 | ||
385 | /* On unified we use proper notifications hence we can unwatch the PIDs | |
386 | * we just attached to the scope. This can also be done on legacy as | |
387 | * we're going to update the list of the processes we watch with the | |
388 | * PIDs currently in the scope anyway. */ | |
389 | unit_unwatch_all_pids(u); | |
390 | ||
391 | /* Start watching the PIDs currently in the scope (legacy hierarchy only) */ | |
392 | (void) unit_enqueue_rewatch_pids(u); | |
393 | return 1; | |
394 | } | |
395 | ||
396 | static int scope_stop(Unit *u) { | |
397 | Scope *s = SCOPE(u); | |
398 | ||
399 | assert(s); | |
400 | ||
401 | if (IN_SET(s->state, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) | |
402 | return 0; | |
403 | ||
404 | assert(IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED)); | |
405 | ||
406 | scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_SUCCESS); | |
407 | return 1; | |
408 | } | |
409 | ||
410 | static void scope_reset_failed(Unit *u) { | |
411 | Scope *s = SCOPE(u); | |
412 | ||
413 | assert(s); | |
414 | ||
415 | if (s->state == SCOPE_FAILED) | |
416 | scope_set_state(s, SCOPE_DEAD); | |
417 | ||
418 | s->result = SCOPE_SUCCESS; | |
419 | } | |
420 | ||
421 | static int scope_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { | |
422 | return unit_kill_common(u, who, signo, -1, -1, error); | |
423 | } | |
424 | ||
425 | static int scope_get_timeout(Unit *u, usec_t *timeout) { | |
426 | Scope *s = SCOPE(u); | |
427 | usec_t t; | |
428 | int r; | |
429 | ||
430 | if (!s->timer_event_source) | |
431 | return 0; | |
432 | ||
433 | r = sd_event_source_get_time(s->timer_event_source, &t); | |
434 | if (r < 0) | |
435 | return r; | |
436 | if (t == USEC_INFINITY) | |
437 | return 0; | |
438 | ||
439 | *timeout = t; | |
440 | return 1; | |
441 | } | |
442 | ||
443 | static int scope_serialize(Unit *u, FILE *f, FDSet *fds) { | |
444 | Scope *s = SCOPE(u); | |
445 | void *pidp; | |
446 | ||
447 | assert(s); | |
448 | assert(f); | |
449 | assert(fds); | |
450 | ||
451 | (void) serialize_item(f, "state", scope_state_to_string(s->state)); | |
452 | (void) serialize_bool(f, "was-abandoned", s->was_abandoned); | |
453 | ||
454 | if (s->controller) | |
455 | (void) serialize_item(f, "controller", s->controller); | |
456 | ||
457 | SET_FOREACH(pidp, u->pids) | |
458 | serialize_item_format(f, "pids", PID_FMT, PTR_TO_PID(pidp)); | |
459 | ||
460 | return 0; | |
461 | } | |
462 | ||
463 | static int scope_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
464 | Scope *s = SCOPE(u); | |
465 | int r; | |
466 | ||
467 | assert(u); | |
468 | assert(key); | |
469 | assert(value); | |
470 | assert(fds); | |
471 | ||
472 | if (streq(key, "state")) { | |
473 | ScopeState state; | |
474 | ||
475 | state = scope_state_from_string(value); | |
476 | if (state < 0) | |
477 | log_unit_debug(u, "Failed to parse state value: %s", value); | |
478 | else | |
479 | s->deserialized_state = state; | |
480 | ||
481 | } else if (streq(key, "was-abandoned")) { | |
482 | int k; | |
483 | ||
484 | k = parse_boolean(value); | |
485 | if (k < 0) | |
486 | log_unit_debug(u, "Failed to parse boolean value: %s", value); | |
487 | else | |
488 | s->was_abandoned = k; | |
489 | } else if (streq(key, "controller")) { | |
490 | ||
491 | r = free_and_strdup(&s->controller, value); | |
492 | if (r < 0) | |
493 | return log_oom(); | |
494 | ||
495 | } else if (streq(key, "pids")) { | |
496 | pid_t pid; | |
497 | ||
498 | if (parse_pid(value, &pid) < 0) | |
499 | log_unit_debug(u, "Failed to parse pids value: %s", value); | |
500 | else { | |
501 | r = set_ensure_put(&u->pids, NULL, PID_TO_PTR(pid)); | |
502 | if (r < 0) | |
503 | return r; | |
504 | } | |
505 | } else | |
506 | log_unit_debug(u, "Unknown serialization key: %s", key); | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
511 | static void scope_notify_cgroup_empty_event(Unit *u) { | |
512 | Scope *s = SCOPE(u); | |
513 | assert(u); | |
514 | ||
515 | log_unit_debug(u, "cgroup is empty"); | |
516 | ||
517 | if (IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED, SCOPE_STOP_SIGTERM, SCOPE_STOP_SIGKILL)) | |
518 | scope_enter_dead(s, SCOPE_SUCCESS); | |
519 | ||
520 | /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean | |
521 | * up the cgroup earlier and should do it now. */ | |
522 | if (IN_SET(s->state, SCOPE_DEAD, SCOPE_FAILED)) | |
523 | unit_prune_cgroup(u); | |
524 | } | |
525 | ||
526 | static void scope_sigchld_event(Unit *u, pid_t pid, int code, int status) { | |
527 | assert(u); | |
528 | ||
529 | /* If we get a SIGCHLD event for one of the processes we were interested in, then we look for others to | |
530 | * watch, under the assumption that we'll sooner or later get a SIGCHLD for them, as the original | |
531 | * process we watched was probably the parent of them, and they are hence now our children. */ | |
532 | ||
533 | (void) unit_enqueue_rewatch_pids(u); | |
534 | } | |
535 | ||
536 | static int scope_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { | |
537 | Scope *s = SCOPE(userdata); | |
538 | ||
539 | assert(s); | |
540 | assert(s->timer_event_source == source); | |
541 | ||
542 | switch (s->state) { | |
543 | ||
544 | case SCOPE_RUNNING: | |
545 | log_unit_warning(UNIT(s), "Scope reached runtime time limit. Stopping."); | |
546 | scope_enter_signal(s, SCOPE_STOP_SIGTERM, SCOPE_FAILURE_TIMEOUT); | |
547 | break; | |
548 | ||
549 | case SCOPE_STOP_SIGTERM: | |
550 | if (s->kill_context.send_sigkill) { | |
551 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); | |
552 | scope_enter_signal(s, SCOPE_STOP_SIGKILL, SCOPE_FAILURE_TIMEOUT); | |
553 | } else { | |
554 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL."); | |
555 | scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT); | |
556 | } | |
557 | ||
558 | break; | |
559 | ||
560 | case SCOPE_STOP_SIGKILL: | |
561 | log_unit_warning(UNIT(s), "Still around after SIGKILL. Ignoring."); | |
562 | scope_enter_dead(s, SCOPE_FAILURE_TIMEOUT); | |
563 | break; | |
564 | ||
565 | default: | |
566 | assert_not_reached("Timeout at wrong time."); | |
567 | } | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
572 | int scope_abandon(Scope *s) { | |
573 | assert(s); | |
574 | ||
575 | if (unit_has_name(UNIT(s), SPECIAL_INIT_SCOPE)) | |
576 | return -EPERM; | |
577 | ||
578 | if (!IN_SET(s->state, SCOPE_RUNNING, SCOPE_ABANDONED)) | |
579 | return -ESTALE; | |
580 | ||
581 | s->was_abandoned = true; | |
582 | ||
583 | s->controller = mfree(s->controller); | |
584 | s->controller_track = sd_bus_track_unref(s->controller_track); | |
585 | ||
586 | scope_set_state(s, SCOPE_ABANDONED); | |
587 | ||
588 | /* The client is no longer watching the remaining processes, so let's step in here, under the assumption that | |
589 | * the remaining processes will be sooner or later reassigned to us as parent. */ | |
590 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
591 | ||
592 | return 0; | |
593 | } | |
594 | ||
595 | _pure_ static UnitActiveState scope_active_state(Unit *u) { | |
596 | assert(u); | |
597 | ||
598 | return state_translation_table[SCOPE(u)->state]; | |
599 | } | |
600 | ||
601 | _pure_ static const char *scope_sub_state_to_string(Unit *u) { | |
602 | assert(u); | |
603 | ||
604 | return scope_state_to_string(SCOPE(u)->state); | |
605 | } | |
606 | ||
607 | static void scope_enumerate_perpetual(Manager *m) { | |
608 | Unit *u; | |
609 | int r; | |
610 | ||
611 | assert(m); | |
612 | ||
613 | /* Let's unconditionally add the "init.scope" special unit | |
614 | * that encapsulates PID 1. Note that PID 1 already is in the | |
615 | * cgroup for this, we hence just need to allocate the object | |
616 | * for it and that's it. */ | |
617 | ||
618 | u = manager_get_unit(m, SPECIAL_INIT_SCOPE); | |
619 | if (!u) { | |
620 | r = unit_new_for_name(m, sizeof(Scope), SPECIAL_INIT_SCOPE, &u); | |
621 | if (r < 0) { | |
622 | log_error_errno(r, "Failed to allocate the special " SPECIAL_INIT_SCOPE " unit: %m"); | |
623 | return; | |
624 | } | |
625 | } | |
626 | ||
627 | u->transient = true; | |
628 | u->perpetual = true; | |
629 | SCOPE(u)->deserialized_state = SCOPE_RUNNING; | |
630 | ||
631 | unit_add_to_load_queue(u); | |
632 | unit_add_to_dbus_queue(u); | |
633 | } | |
634 | ||
635 | static const char* const scope_result_table[_SCOPE_RESULT_MAX] = { | |
636 | [SCOPE_SUCCESS] = "success", | |
637 | [SCOPE_FAILURE_RESOURCES] = "resources", | |
638 | [SCOPE_FAILURE_TIMEOUT] = "timeout", | |
639 | }; | |
640 | ||
641 | DEFINE_STRING_TABLE_LOOKUP(scope_result, ScopeResult); | |
642 | ||
643 | const UnitVTable scope_vtable = { | |
644 | .object_size = sizeof(Scope), | |
645 | .cgroup_context_offset = offsetof(Scope, cgroup_context), | |
646 | .kill_context_offset = offsetof(Scope, kill_context), | |
647 | ||
648 | .sections = | |
649 | "Unit\0" | |
650 | "Scope\0" | |
651 | "Install\0", | |
652 | .private_section = "Scope", | |
653 | ||
654 | .can_transient = true, | |
655 | .can_delegate = true, | |
656 | .can_fail = true, | |
657 | .once_only = true, | |
658 | .can_set_managed_oom = true, | |
659 | ||
660 | .init = scope_init, | |
661 | .load = scope_load, | |
662 | .done = scope_done, | |
663 | ||
664 | .coldplug = scope_coldplug, | |
665 | ||
666 | .dump = scope_dump, | |
667 | ||
668 | .start = scope_start, | |
669 | .stop = scope_stop, | |
670 | ||
671 | .kill = scope_kill, | |
672 | ||
673 | .freeze = unit_freeze_vtable_common, | |
674 | .thaw = unit_thaw_vtable_common, | |
675 | ||
676 | .get_timeout = scope_get_timeout, | |
677 | ||
678 | .serialize = scope_serialize, | |
679 | .deserialize_item = scope_deserialize_item, | |
680 | ||
681 | .active_state = scope_active_state, | |
682 | .sub_state_to_string = scope_sub_state_to_string, | |
683 | ||
684 | .sigchld_event = scope_sigchld_event, | |
685 | ||
686 | .reset_failed = scope_reset_failed, | |
687 | ||
688 | .notify_cgroup_empty = scope_notify_cgroup_empty_event, | |
689 | ||
690 | .bus_set_property = bus_scope_set_property, | |
691 | .bus_commit_properties = bus_scope_commit_properties, | |
692 | ||
693 | .enumerate_perpetual = scope_enumerate_perpetual, | |
694 | }; |