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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5cb5a6ff | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
d46de8a1 LP |
22 | #include <errno.h> |
23 | ||
b5efdb8a | 24 | #include "alloc-util.h" |
07630cea LP |
25 | #include "bus-error.h" |
26 | #include "bus-util.h" | |
871d7de4 | 27 | #include "dbus-timer.h" |
f4f15635 | 28 | #include "fs-util.h" |
6bedfcbb | 29 | #include "parse-util.h" |
a40eb732 | 30 | #include "special.h" |
8b43440b | 31 | #include "string-table.h" |
07630cea | 32 | #include "string-util.h" |
b1d4f8e1 | 33 | #include "timer.h" |
07630cea LP |
34 | #include "unit-name.h" |
35 | #include "unit.h" | |
b1d4f8e1 | 36 | #include "user-util.h" |
c1d9ba99 | 37 | #include "virt.h" |
871d7de4 LP |
38 | |
39 | static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = { | |
40 | [TIMER_DEAD] = UNIT_INACTIVE, | |
41 | [TIMER_WAITING] = UNIT_ACTIVE, | |
42 | [TIMER_RUNNING] = UNIT_ACTIVE, | |
43 | [TIMER_ELAPSED] = UNIT_ACTIVE, | |
fdf20a31 | 44 | [TIMER_FAILED] = UNIT_FAILED |
871d7de4 LP |
45 | }; |
46 | ||
718db961 LP |
47 | static int timer_dispatch(sd_event_source *s, uint64_t usec, void *userdata); |
48 | ||
871d7de4 LP |
49 | static void timer_init(Unit *u) { |
50 | Timer *t = TIMER(u); | |
51 | ||
52 | assert(u); | |
ac155bb8 | 53 | assert(u->load_state == UNIT_STUB); |
871d7de4 | 54 | |
3a43da28 KS |
55 | t->next_elapse_monotonic_or_boottime = USEC_INFINITY; |
56 | t->next_elapse_realtime = USEC_INFINITY; | |
bd8f585b | 57 | t->accuracy_usec = u->manager->default_timer_accuracy_usec; |
3e0c30ac | 58 | t->remain_after_elapse = true; |
871d7de4 | 59 | } |
5cb5a6ff | 60 | |
74051b9b | 61 | void timer_free_values(Timer *t) { |
871d7de4 LP |
62 | TimerValue *v; |
63 | ||
64 | assert(t); | |
65 | ||
66 | while ((v = t->values)) { | |
71fda00f | 67 | LIST_REMOVE(value, t->values, v); |
3e044c49 | 68 | calendar_spec_free(v->calendar_spec); |
871d7de4 LP |
69 | free(v); |
70 | } | |
74051b9b LP |
71 | } |
72 | ||
73 | static void timer_done(Unit *u) { | |
74 | Timer *t = TIMER(u); | |
75 | ||
76 | assert(t); | |
77 | ||
78 | timer_free_values(t); | |
871d7de4 | 79 | |
718db961 LP |
80 | t->monotonic_event_source = sd_event_source_unref(t->monotonic_event_source); |
81 | t->realtime_event_source = sd_event_source_unref(t->realtime_event_source); | |
06642d17 LP |
82 | |
83 | free(t->stamp_path); | |
871d7de4 LP |
84 | } |
85 | ||
86 | static int timer_verify(Timer *t) { | |
87 | assert(t); | |
88 | ||
1124fe6f | 89 | if (UNIT(t)->load_state != UNIT_LOADED) |
871d7de4 LP |
90 | return 0; |
91 | ||
92 | if (!t->values) { | |
f2341e0a | 93 | log_unit_error(UNIT(t), "Timer unit lacks value setting. Refusing."); |
871d7de4 LP |
94 | return -EINVAL; |
95 | } | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
6c155fe3 LP |
100 | static int timer_add_default_dependencies(Timer *t) { |
101 | int r; | |
19f8d037 | 102 | TimerValue *v; |
6c155fe3 LP |
103 | |
104 | assert(t); | |
105 | ||
4c9ea260 LP |
106 | if (!UNIT(t)->default_dependencies) |
107 | return 0; | |
108 | ||
e3d84721 LP |
109 | r = unit_add_dependency_by_name(UNIT(t), UNIT_BEFORE, SPECIAL_TIMERS_TARGET, NULL, true); |
110 | if (r < 0) | |
111 | return r; | |
2a77d31d | 112 | |
b2c23da8 | 113 | if (UNIT(t)->manager->running_as == MANAGER_SYSTEM) { |
36697dc0 LP |
114 | r = unit_add_two_dependencies_by_name(UNIT(t), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true); |
115 | if (r < 0) | |
6c155fe3 | 116 | return r; |
19f8d037 TGR |
117 | |
118 | LIST_FOREACH(value, v, t->values) { | |
119 | if (v->base == TIMER_CALENDAR) { | |
120 | r = unit_add_dependency_by_name(UNIT(t), UNIT_AFTER, SPECIAL_TIME_SYNC_TARGET, NULL, true); | |
121 | if (r < 0) | |
122 | return r; | |
123 | break; | |
124 | } | |
125 | } | |
2a77d31d | 126 | } |
6c155fe3 | 127 | |
ead8e478 | 128 | return unit_add_two_dependencies_by_name(UNIT(t), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true); |
6c155fe3 LP |
129 | } |
130 | ||
06642d17 LP |
131 | static int timer_setup_persistent(Timer *t) { |
132 | int r; | |
133 | ||
134 | assert(t); | |
135 | ||
136 | if (!t->persistent) | |
137 | return 0; | |
138 | ||
b2c23da8 | 139 | if (UNIT(t)->manager->running_as == MANAGER_SYSTEM) { |
06642d17 LP |
140 | |
141 | r = unit_require_mounts_for(UNIT(t), "/var/lib/systemd/timers"); | |
142 | if (r < 0) | |
143 | return r; | |
144 | ||
145 | t->stamp_path = strappend("/var/lib/systemd/timers/stamp-", UNIT(t)->id); | |
146 | } else { | |
147 | const char *e; | |
148 | ||
149 | e = getenv("XDG_DATA_HOME"); | |
150 | if (e) | |
bd34b310 | 151 | t->stamp_path = strjoin(e, "/systemd/timers/stamp-", UNIT(t)->id, NULL); |
06642d17 LP |
152 | else { |
153 | ||
154 | _cleanup_free_ char *h = NULL; | |
155 | ||
156 | r = get_home_dir(&h); | |
23bbb0de | 157 | if (r < 0) |
f2341e0a | 158 | return log_unit_error_errno(UNIT(t), r, "Failed to determine home directory: %m"); |
06642d17 LP |
159 | |
160 | t->stamp_path = strjoin(h, "/.local/share/systemd/timers/stamp-", UNIT(t)->id, NULL); | |
161 | } | |
162 | } | |
163 | ||
164 | if (!t->stamp_path) | |
165 | return log_oom(); | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
871d7de4 LP |
170 | static int timer_load(Unit *u) { |
171 | Timer *t = TIMER(u); | |
172 | int r; | |
173 | ||
174 | assert(u); | |
ac155bb8 | 175 | assert(u->load_state == UNIT_STUB); |
871d7de4 | 176 | |
36697dc0 LP |
177 | r = unit_load_fragment_and_dropin(u); |
178 | if (r < 0) | |
871d7de4 LP |
179 | return r; |
180 | ||
ac155bb8 | 181 | if (u->load_state == UNIT_LOADED) { |
871d7de4 | 182 | |
3ecaa09b | 183 | if (set_isempty(u->dependencies[UNIT_TRIGGERS])) { |
57020a3a LP |
184 | Unit *x; |
185 | ||
186 | r = unit_load_related_unit(u, ".service", &x); | |
187 | if (r < 0) | |
871d7de4 LP |
188 | return r; |
189 | ||
3ecaa09b LP |
190 | r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, x, true); |
191 | if (r < 0) | |
192 | return r; | |
57020a3a LP |
193 | } |
194 | ||
06642d17 LP |
195 | r = timer_setup_persistent(t); |
196 | if (r < 0) | |
197 | return r; | |
198 | ||
4c9ea260 LP |
199 | r = timer_add_default_dependencies(t); |
200 | if (r < 0) | |
201 | return r; | |
871d7de4 LP |
202 | } |
203 | ||
204 | return timer_verify(t); | |
205 | } | |
206 | ||
207 | static void timer_dump(Unit *u, FILE *f, const char *prefix) { | |
9f5eb56a | 208 | char buf[FORMAT_TIMESPAN_MAX]; |
871d7de4 | 209 | Timer *t = TIMER(u); |
3ecaa09b | 210 | Unit *trigger; |
871d7de4 | 211 | TimerValue *v; |
034c6ed7 | 212 | |
3ecaa09b LP |
213 | trigger = UNIT_TRIGGER(u); |
214 | ||
871d7de4 LP |
215 | fprintf(f, |
216 | "%sTimer State: %s\n" | |
067d72c9 | 217 | "%sResult: %s\n" |
9f5eb56a | 218 | "%sUnit: %s\n" |
dedabea4 LP |
219 | "%sPersistent: %s\n" |
220 | "%sWakeSystem: %s\n" | |
3e0c30ac LP |
221 | "%sAccuracy: %s\n" |
222 | "%sRemainAfterElapse: %s\n", | |
871d7de4 | 223 | prefix, timer_state_to_string(t->state), |
067d72c9 | 224 | prefix, timer_result_to_string(t->result), |
9f5eb56a | 225 | prefix, trigger ? trigger->id : "n/a", |
dedabea4 LP |
226 | prefix, yes_no(t->persistent), |
227 | prefix, yes_no(t->wake_system), | |
3e0c30ac LP |
228 | prefix, format_timespan(buf, sizeof(buf), t->accuracy_usec, 1), |
229 | prefix, yes_no(t->remain_after_elapse)); | |
871d7de4 | 230 | |
36697dc0 LP |
231 | LIST_FOREACH(value, v, t->values) { |
232 | ||
233 | if (v->base == TIMER_CALENDAR) { | |
234 | _cleanup_free_ char *p = NULL; | |
235 | ||
236 | calendar_spec_to_string(v->calendar_spec, &p); | |
237 | ||
238 | fprintf(f, | |
239 | "%s%s: %s\n", | |
240 | prefix, | |
241 | timer_base_to_string(v->base), | |
242 | strna(p)); | |
243 | } else { | |
244 | char timespan1[FORMAT_TIMESPAN_MAX]; | |
245 | ||
246 | fprintf(f, | |
247 | "%s%s: %s\n", | |
248 | prefix, | |
249 | timer_base_to_string(v->base), | |
b1d6dcf5 | 250 | format_timespan(timespan1, sizeof(timespan1), v->value, 0)); |
36697dc0 LP |
251 | } |
252 | } | |
871d7de4 LP |
253 | } |
254 | ||
255 | static void timer_set_state(Timer *t, TimerState state) { | |
256 | TimerState old_state; | |
034c6ed7 | 257 | assert(t); |
871d7de4 LP |
258 | |
259 | old_state = t->state; | |
260 | t->state = state; | |
261 | ||
36697dc0 | 262 | if (state != TIMER_WAITING) { |
718db961 LP |
263 | t->monotonic_event_source = sd_event_source_unref(t->monotonic_event_source); |
264 | t->realtime_event_source = sd_event_source_unref(t->realtime_event_source); | |
36697dc0 | 265 | } |
871d7de4 LP |
266 | |
267 | if (state != old_state) | |
f2341e0a | 268 | log_unit_debug(UNIT(t), "Changed %s -> %s", timer_state_to_string(old_state), timer_state_to_string(state)); |
871d7de4 | 269 | |
e2f3b44c | 270 | unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true); |
871d7de4 LP |
271 | } |
272 | ||
273 | static void timer_enter_waiting(Timer *t, bool initial); | |
274 | ||
be847e82 | 275 | static int timer_coldplug(Unit *u) { |
871d7de4 LP |
276 | Timer *t = TIMER(u); |
277 | ||
278 | assert(t); | |
279 | assert(t->state == TIMER_DEAD); | |
280 | ||
3e0c30ac LP |
281 | if (t->deserialized_state == t->state) |
282 | return 0; | |
871d7de4 | 283 | |
3e0c30ac LP |
284 | if (t->deserialized_state == TIMER_WAITING) |
285 | timer_enter_waiting(t, false); | |
286 | else | |
287 | timer_set_state(t, t->deserialized_state); | |
871d7de4 LP |
288 | |
289 | return 0; | |
290 | } | |
291 | ||
067d72c9 | 292 | static void timer_enter_dead(Timer *t, TimerResult f) { |
871d7de4 LP |
293 | assert(t); |
294 | ||
067d72c9 LP |
295 | if (f != TIMER_SUCCESS) |
296 | t->result = f; | |
871d7de4 | 297 | |
067d72c9 | 298 | timer_set_state(t, t->result != TIMER_SUCCESS ? TIMER_FAILED : TIMER_DEAD); |
871d7de4 LP |
299 | } |
300 | ||
3e0c30ac LP |
301 | static void timer_enter_elapsed(Timer *t, bool leave_around) { |
302 | assert(t); | |
303 | ||
304 | /* If a unit is marked with RemainAfterElapse=yes we leave it | |
305 | * around even after it elapsed once, so that starting it | |
306 | * later again does not necessarily mean immediate | |
307 | * retriggering. We unconditionally leave units with | |
308 | * TIMER_UNIT_ACTIVE or TIMER_UNIT_INACTIVE triggers around, | |
309 | * since they might be restarted automatically at any time | |
310 | * later on. */ | |
311 | ||
312 | if (t->remain_after_elapse || leave_around) | |
313 | timer_set_state(t, TIMER_ELAPSED); | |
314 | else | |
315 | timer_enter_dead(t, TIMER_SUCCESS); | |
316 | } | |
317 | ||
dedabea4 LP |
318 | static usec_t monotonic_to_boottime(usec_t t) { |
319 | usec_t a, b; | |
320 | ||
321 | if (t <= 0) | |
322 | return 0; | |
323 | ||
324 | a = now(CLOCK_BOOTTIME); | |
325 | b = now(CLOCK_MONOTONIC); | |
326 | ||
327 | if (t + a > b) | |
328 | return t + a - b; | |
329 | else | |
330 | return 0; | |
331 | } | |
332 | ||
871d7de4 | 333 | static void timer_enter_waiting(Timer *t, bool initial) { |
36697dc0 | 334 | bool found_monotonic = false, found_realtime = false; |
dedabea4 LP |
335 | usec_t ts_realtime, ts_monotonic; |
336 | usec_t base = 0; | |
3e0c30ac | 337 | bool leave_around = false; |
dedabea4 | 338 | TimerValue *v; |
871d7de4 LP |
339 | int r; |
340 | ||
dedabea4 LP |
341 | /* If we shall wake the system we use the boottime clock |
342 | * rather than the monotonic clock. */ | |
343 | ||
344 | ts_realtime = now(CLOCK_REALTIME); | |
345 | ts_monotonic = now(t->wake_system ? CLOCK_BOOTTIME : CLOCK_MONOTONIC); | |
346 | t->next_elapse_monotonic_or_boottime = t->next_elapse_realtime = 0; | |
871d7de4 LP |
347 | |
348 | LIST_FOREACH(value, v, t->values) { | |
349 | ||
350 | if (v->disabled) | |
351 | continue; | |
352 | ||
36697dc0 | 353 | if (v->base == TIMER_CALENDAR) { |
06642d17 LP |
354 | usec_t b; |
355 | ||
356 | /* If we know the last time this was | |
357 | * triggered, schedule the job based relative | |
358 | * to that. If we don't just start from | |
359 | * now. */ | |
36697dc0 | 360 | |
dedabea4 | 361 | b = t->last_trigger.realtime > 0 ? t->last_trigger.realtime : ts_realtime; |
06642d17 LP |
362 | |
363 | r = calendar_spec_next_usec(v->calendar_spec, b, &v->next_elapse); | |
36697dc0 LP |
364 | if (r < 0) |
365 | continue; | |
366 | ||
36697dc0 LP |
367 | if (!found_realtime) |
368 | t->next_elapse_realtime = v->next_elapse; | |
10717a1a | 369 | else |
36697dc0 | 370 | t->next_elapse_realtime = MIN(t->next_elapse_realtime, v->next_elapse); |
871d7de4 | 371 | |
36697dc0 | 372 | found_realtime = true; |
871d7de4 | 373 | |
36697dc0 LP |
374 | } else { |
375 | switch (v->base) { | |
871d7de4 | 376 | |
36697dc0 LP |
377 | case TIMER_ACTIVE: |
378 | if (state_translation_table[t->state] == UNIT_ACTIVE) | |
379 | base = UNIT(t)->inactive_exit_timestamp.monotonic; | |
380 | else | |
dedabea4 | 381 | base = ts_monotonic; |
36697dc0 | 382 | break; |
871d7de4 | 383 | |
36697dc0 | 384 | case TIMER_BOOT: |
c1d9ba99 MS |
385 | if (detect_container() <= 0) { |
386 | /* CLOCK_MONOTONIC equals the uptime on Linux */ | |
387 | base = 0; | |
388 | break; | |
389 | } | |
390 | /* In a container we don't want to include the time the host | |
391 | * was already up when the container started, so count from | |
392 | * our own startup. Fall through. */ | |
36697dc0 LP |
393 | case TIMER_STARTUP: |
394 | base = UNIT(t)->manager->userspace_timestamp.monotonic; | |
395 | break; | |
871d7de4 | 396 | |
36697dc0 | 397 | case TIMER_UNIT_ACTIVE: |
3e0c30ac | 398 | leave_around = true; |
e41e1943 LP |
399 | base = UNIT_TRIGGER(UNIT(t))->inactive_exit_timestamp.monotonic; |
400 | ||
401 | if (base <= 0) | |
06642d17 | 402 | base = t->last_trigger.monotonic; |
e41e1943 LP |
403 | |
404 | if (base <= 0) | |
36697dc0 | 405 | continue; |
871d7de4 | 406 | |
36697dc0 | 407 | break; |
871d7de4 | 408 | |
36697dc0 | 409 | case TIMER_UNIT_INACTIVE: |
3e0c30ac | 410 | leave_around = true; |
e41e1943 LP |
411 | base = UNIT_TRIGGER(UNIT(t))->inactive_enter_timestamp.monotonic; |
412 | ||
413 | if (base <= 0) | |
06642d17 | 414 | base = t->last_trigger.monotonic; |
e41e1943 LP |
415 | |
416 | if (base <= 0) | |
36697dc0 | 417 | continue; |
871d7de4 | 418 | |
36697dc0 | 419 | break; |
871d7de4 | 420 | |
36697dc0 LP |
421 | default: |
422 | assert_not_reached("Unknown timer base"); | |
423 | } | |
871d7de4 | 424 | |
dedabea4 LP |
425 | if (t->wake_system) |
426 | base = monotonic_to_boottime(base); | |
427 | ||
36697dc0 LP |
428 | v->next_elapse = base + v->value; |
429 | ||
dedabea4 | 430 | if (!initial && v->next_elapse < ts_monotonic && IN_SET(v->base, TIMER_ACTIVE, TIMER_BOOT, TIMER_STARTUP)) { |
e41e1943 | 431 | /* This is a one time trigger, disable it now */ |
36697dc0 LP |
432 | v->disabled = true; |
433 | continue; | |
434 | } | |
435 | ||
436 | if (!found_monotonic) | |
dedabea4 | 437 | t->next_elapse_monotonic_or_boottime = v->next_elapse; |
36697dc0 | 438 | else |
dedabea4 | 439 | t->next_elapse_monotonic_or_boottime = MIN(t->next_elapse_monotonic_or_boottime, v->next_elapse); |
36697dc0 LP |
440 | |
441 | found_monotonic = true; | |
442 | } | |
871d7de4 LP |
443 | } |
444 | ||
36697dc0 | 445 | if (!found_monotonic && !found_realtime) { |
f2341e0a | 446 | log_unit_debug(UNIT(t), "Timer is elapsed."); |
3e0c30ac | 447 | timer_enter_elapsed(t, leave_around); |
871d7de4 LP |
448 | return; |
449 | } | |
450 | ||
36697dc0 LP |
451 | if (found_monotonic) { |
452 | char buf[FORMAT_TIMESPAN_MAX]; | |
3e0c30ac | 453 | usec_t left; |
dedabea4 | 454 | |
3e0c30ac LP |
455 | left = t->next_elapse_monotonic_or_boottime > ts_monotonic ? t->next_elapse_monotonic_or_boottime - ts_monotonic : 0; |
456 | log_unit_debug(UNIT(t), "Monotonic timer elapses in %s.", format_timespan(buf, sizeof(buf), left, 0)); | |
871d7de4 | 457 | |
718db961 | 458 | if (t->monotonic_event_source) { |
dedabea4 | 459 | r = sd_event_source_set_time(t->monotonic_event_source, t->next_elapse_monotonic_or_boottime); |
718db961 LP |
460 | if (r < 0) |
461 | goto fail; | |
462 | ||
463 | r = sd_event_source_set_enabled(t->monotonic_event_source, SD_EVENT_ONESHOT); | |
cbf60d0a LP |
464 | if (r < 0) |
465 | goto fail; | |
466 | } else { | |
467 | ||
6a0f1f6d LP |
468 | r = sd_event_add_time( |
469 | UNIT(t)->manager->event, | |
470 | &t->monotonic_event_source, | |
dedabea4 LP |
471 | t->wake_system ? CLOCK_BOOTTIME_ALARM : CLOCK_MONOTONIC, |
472 | t->next_elapse_monotonic_or_boottime, t->accuracy_usec, | |
6a0f1f6d | 473 | timer_dispatch, t); |
cbf60d0a LP |
474 | if (r < 0) |
475 | goto fail; | |
718db961 | 476 | |
cbf60d0a LP |
477 | (void) sd_event_source_set_description(t->monotonic_event_source, "timer-monotonic"); |
478 | } | |
7dfbe2e3 | 479 | |
718db961 | 480 | } else if (t->monotonic_event_source) { |
718db961 | 481 | |
06642d17 | 482 | r = sd_event_source_set_enabled(t->monotonic_event_source, SD_EVENT_OFF); |
718db961 LP |
483 | if (r < 0) |
484 | goto fail; | |
485 | } | |
36697dc0 LP |
486 | |
487 | if (found_realtime) { | |
488 | char buf[FORMAT_TIMESTAMP_MAX]; | |
f2341e0a | 489 | log_unit_debug(UNIT(t), "Realtime timer elapses at %s.", format_timestamp(buf, sizeof(buf), t->next_elapse_realtime)); |
36697dc0 | 490 | |
718db961 LP |
491 | if (t->realtime_event_source) { |
492 | r = sd_event_source_set_time(t->realtime_event_source, t->next_elapse_realtime); | |
493 | if (r < 0) | |
494 | goto fail; | |
495 | ||
496 | r = sd_event_source_set_enabled(t->realtime_event_source, SD_EVENT_ONESHOT); | |
cbf60d0a LP |
497 | if (r < 0) |
498 | goto fail; | |
499 | } else { | |
6a0f1f6d LP |
500 | r = sd_event_add_time( |
501 | UNIT(t)->manager->event, | |
502 | &t->realtime_event_source, | |
dedabea4 | 503 | t->wake_system ? CLOCK_REALTIME_ALARM : CLOCK_REALTIME, |
6a0f1f6d LP |
504 | t->next_elapse_realtime, t->accuracy_usec, |
505 | timer_dispatch, t); | |
cbf60d0a LP |
506 | if (r < 0) |
507 | goto fail; | |
718db961 | 508 | |
cbf60d0a LP |
509 | (void) sd_event_source_set_description(t->realtime_event_source, "timer-realtime"); |
510 | } | |
7dfbe2e3 | 511 | |
718db961 | 512 | } else if (t->realtime_event_source) { |
718db961 | 513 | |
06642d17 | 514 | r = sd_event_source_set_enabled(t->realtime_event_source, SD_EVENT_OFF); |
718db961 LP |
515 | if (r < 0) |
516 | goto fail; | |
517 | } | |
871d7de4 LP |
518 | |
519 | timer_set_state(t, TIMER_WAITING); | |
520 | return; | |
521 | ||
522 | fail: | |
f2341e0a | 523 | log_unit_warning_errno(UNIT(t), r, "Failed to enter waiting state: %m"); |
067d72c9 | 524 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); |
871d7de4 LP |
525 | } |
526 | ||
527 | static void timer_enter_running(Timer *t) { | |
718db961 | 528 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
871d7de4 | 529 | int r; |
398ef8ba | 530 | |
871d7de4 LP |
531 | assert(t); |
532 | ||
ba3e67a7 | 533 | /* Don't start job if we are supposed to go down */ |
31afa0a4 | 534 | if (unit_stop_pending(UNIT(t))) |
ba3e67a7 LP |
535 | return; |
536 | ||
4bd29fe5 | 537 | r = manager_add_job(UNIT(t)->manager, JOB_START, UNIT_TRIGGER(UNIT(t)), JOB_REPLACE, &error, NULL); |
36697dc0 | 538 | if (r < 0) |
871d7de4 LP |
539 | goto fail; |
540 | ||
06642d17 LP |
541 | dual_timestamp_get(&t->last_trigger); |
542 | ||
472fc28f | 543 | if (t->stamp_path) |
ee735086 | 544 | touch_file(t->stamp_path, true, t->last_trigger.realtime, UID_INVALID, GID_INVALID, MODE_INVALID); |
e41e1943 | 545 | |
871d7de4 LP |
546 | timer_set_state(t, TIMER_RUNNING); |
547 | return; | |
548 | ||
549 | fail: | |
f2341e0a | 550 | log_unit_warning(UNIT(t), "Failed to queue unit startup job: %s", bus_error_message(&error, r)); |
067d72c9 | 551 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); |
871d7de4 LP |
552 | } |
553 | ||
554 | static int timer_start(Unit *u) { | |
555 | Timer *t = TIMER(u); | |
779042e7 | 556 | TimerValue *v; |
871d7de4 LP |
557 | |
558 | assert(t); | |
fdf20a31 | 559 | assert(t->state == TIMER_DEAD || t->state == TIMER_FAILED); |
01f78473 | 560 | |
3ecaa09b | 561 | if (UNIT_TRIGGER(u)->load_state != UNIT_LOADED) |
01f78473 | 562 | return -ENOENT; |
871d7de4 | 563 | |
06642d17 LP |
564 | t->last_trigger = DUAL_TIMESTAMP_NULL; |
565 | ||
779042e7 MC |
566 | /* Reenable all timers that depend on unit activation time */ |
567 | LIST_FOREACH(value, v, t->values) | |
568 | if (v->base == TIMER_ACTIVE) | |
569 | v->disabled = false; | |
570 | ||
06642d17 LP |
571 | if (t->stamp_path) { |
572 | struct stat st; | |
573 | ||
574 | if (stat(t->stamp_path, &st) >= 0) | |
575 | t->last_trigger.realtime = timespec_load(&st.st_atim); | |
472fc28f TB |
576 | else if (errno == ENOENT) |
577 | /* The timer has never run before, | |
578 | * make sure a stamp file exists. | |
579 | */ | |
ee735086 | 580 | touch_file(t->stamp_path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, MODE_INVALID); |
06642d17 LP |
581 | } |
582 | ||
067d72c9 | 583 | t->result = TIMER_SUCCESS; |
871d7de4 | 584 | timer_enter_waiting(t, true); |
82a2b6bb | 585 | return 1; |
871d7de4 LP |
586 | } |
587 | ||
588 | static int timer_stop(Unit *u) { | |
589 | Timer *t = TIMER(u); | |
590 | ||
591 | assert(t); | |
592 | assert(t->state == TIMER_WAITING || t->state == TIMER_RUNNING || t->state == TIMER_ELAPSED); | |
593 | ||
067d72c9 | 594 | timer_enter_dead(t, TIMER_SUCCESS); |
82a2b6bb | 595 | return 1; |
871d7de4 LP |
596 | } |
597 | ||
598 | static int timer_serialize(Unit *u, FILE *f, FDSet *fds) { | |
599 | Timer *t = TIMER(u); | |
600 | ||
601 | assert(u); | |
602 | assert(f); | |
603 | assert(fds); | |
604 | ||
605 | unit_serialize_item(u, f, "state", timer_state_to_string(t->state)); | |
067d72c9 | 606 | unit_serialize_item(u, f, "result", timer_result_to_string(t->result)); |
871d7de4 | 607 | |
06642d17 LP |
608 | if (t->last_trigger.realtime > 0) |
609 | unit_serialize_item_format(u, f, "last-trigger-realtime", "%" PRIu64, t->last_trigger.realtime); | |
610 | ||
611 | if (t->last_trigger.monotonic > 0) | |
612 | unit_serialize_item_format(u, f, "last-trigger-monotonic", "%" PRIu64, t->last_trigger.monotonic); | |
613 | ||
871d7de4 LP |
614 | return 0; |
615 | } | |
616 | ||
617 | static int timer_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
618 | Timer *t = TIMER(u); | |
06642d17 | 619 | int r; |
871d7de4 LP |
620 | |
621 | assert(u); | |
622 | assert(key); | |
623 | assert(value); | |
624 | assert(fds); | |
625 | ||
626 | if (streq(key, "state")) { | |
627 | TimerState state; | |
628 | ||
36697dc0 LP |
629 | state = timer_state_from_string(value); |
630 | if (state < 0) | |
f2341e0a | 631 | log_unit_debug(u, "Failed to parse state value: %s", value); |
871d7de4 LP |
632 | else |
633 | t->deserialized_state = state; | |
067d72c9 LP |
634 | } else if (streq(key, "result")) { |
635 | TimerResult f; | |
636 | ||
637 | f = timer_result_from_string(value); | |
638 | if (f < 0) | |
f2341e0a | 639 | log_unit_debug(u, "Failed to parse result value: %s", value); |
067d72c9 LP |
640 | else if (f != TIMER_SUCCESS) |
641 | t->result = f; | |
06642d17 LP |
642 | } else if (streq(key, "last-trigger-realtime")) { |
643 | ||
644 | r = safe_atou64(value, &t->last_trigger.realtime); | |
645 | if (r < 0) | |
f2341e0a | 646 | log_unit_debug(u, "Failed to parse last-trigger-realtime value: %s", value); |
06642d17 LP |
647 | |
648 | } else if (streq(key, "last-trigger-monotonic")) { | |
649 | ||
650 | r = safe_atou64(value, &t->last_trigger.monotonic); | |
651 | if (r < 0) | |
f2341e0a | 652 | log_unit_debug(u, "Failed to parse last-trigger-monotonic value: %s", value); |
067d72c9 | 653 | |
871d7de4 | 654 | } else |
f2341e0a | 655 | log_unit_debug(u, "Unknown serialization key: %s", key); |
871d7de4 LP |
656 | |
657 | return 0; | |
034c6ed7 LP |
658 | } |
659 | ||
44a6b1b6 | 660 | _pure_ static UnitActiveState timer_active_state(Unit *u) { |
871d7de4 LP |
661 | assert(u); |
662 | ||
663 | return state_translation_table[TIMER(u)->state]; | |
664 | } | |
665 | ||
44a6b1b6 | 666 | _pure_ static const char *timer_sub_state_to_string(Unit *u) { |
871d7de4 LP |
667 | assert(u); |
668 | ||
669 | return timer_state_to_string(TIMER(u)->state); | |
670 | } | |
671 | ||
718db961 LP |
672 | static int timer_dispatch(sd_event_source *s, uint64_t usec, void *userdata) { |
673 | Timer *t = TIMER(userdata); | |
871d7de4 LP |
674 | |
675 | assert(t); | |
5cb5a6ff | 676 | |
871d7de4 | 677 | if (t->state != TIMER_WAITING) |
718db961 | 678 | return 0; |
5cb5a6ff | 679 | |
f2341e0a | 680 | log_unit_debug(UNIT(t), "Timer elapsed."); |
871d7de4 | 681 | timer_enter_running(t); |
718db961 | 682 | return 0; |
5cb5a6ff LP |
683 | } |
684 | ||
3ecaa09b LP |
685 | static void timer_trigger_notify(Unit *u, Unit *other) { |
686 | Timer *t = TIMER(u); | |
687 | TimerValue *v; | |
871d7de4 | 688 | |
3ecaa09b LP |
689 | assert(u); |
690 | assert(other); | |
871d7de4 | 691 | |
3ecaa09b LP |
692 | if (other->load_state != UNIT_LOADED) |
693 | return; | |
871d7de4 | 694 | |
3ecaa09b LP |
695 | /* Reenable all timers that depend on unit state */ |
696 | LIST_FOREACH(value, v, t->values) | |
697 | if (v->base == TIMER_UNIT_ACTIVE || | |
698 | v->base == TIMER_UNIT_INACTIVE) | |
699 | v->disabled = false; | |
01f78473 | 700 | |
3ecaa09b | 701 | switch (t->state) { |
871d7de4 | 702 | |
3ecaa09b LP |
703 | case TIMER_WAITING: |
704 | case TIMER_ELAPSED: | |
871d7de4 | 705 | |
3ecaa09b LP |
706 | /* Recalculate sleep time */ |
707 | timer_enter_waiting(t, false); | |
708 | break; | |
871d7de4 | 709 | |
3ecaa09b | 710 | case TIMER_RUNNING: |
871d7de4 | 711 | |
3ecaa09b | 712 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { |
f2341e0a | 713 | log_unit_debug(UNIT(t), "Got notified about unit deactivation."); |
871d7de4 | 714 | timer_enter_waiting(t, false); |
3ecaa09b LP |
715 | } |
716 | break; | |
871d7de4 | 717 | |
3ecaa09b LP |
718 | case TIMER_DEAD: |
719 | case TIMER_FAILED: | |
720 | break; | |
871d7de4 | 721 | |
3ecaa09b LP |
722 | default: |
723 | assert_not_reached("Unknown timer state"); | |
871d7de4 | 724 | } |
871d7de4 LP |
725 | } |
726 | ||
fdf20a31 | 727 | static void timer_reset_failed(Unit *u) { |
5632e374 LP |
728 | Timer *t = TIMER(u); |
729 | ||
730 | assert(t); | |
731 | ||
fdf20a31 | 732 | if (t->state == TIMER_FAILED) |
5632e374 LP |
733 | timer_set_state(t, TIMER_DEAD); |
734 | ||
067d72c9 | 735 | t->result = TIMER_SUCCESS; |
5632e374 LP |
736 | } |
737 | ||
8742514c LP |
738 | static void timer_time_change(Unit *u) { |
739 | Timer *t = TIMER(u); | |
740 | ||
741 | assert(u); | |
742 | ||
743 | if (t->state != TIMER_WAITING) | |
744 | return; | |
745 | ||
f2341e0a | 746 | log_unit_debug(u, "Time change, recalculating next elapse."); |
8742514c LP |
747 | timer_enter_waiting(t, false); |
748 | } | |
749 | ||
871d7de4 | 750 | static const char* const timer_base_table[_TIMER_BASE_MAX] = { |
03fae018 LP |
751 | [TIMER_ACTIVE] = "OnActiveSec", |
752 | [TIMER_BOOT] = "OnBootSec", | |
753 | [TIMER_STARTUP] = "OnStartupSec", | |
754 | [TIMER_UNIT_ACTIVE] = "OnUnitActiveSec", | |
36697dc0 LP |
755 | [TIMER_UNIT_INACTIVE] = "OnUnitInactiveSec", |
756 | [TIMER_CALENDAR] = "OnCalendar" | |
871d7de4 LP |
757 | }; |
758 | ||
759 | DEFINE_STRING_TABLE_LOOKUP(timer_base, TimerBase); | |
760 | ||
067d72c9 LP |
761 | static const char* const timer_result_table[_TIMER_RESULT_MAX] = { |
762 | [TIMER_SUCCESS] = "success", | |
763 | [TIMER_FAILURE_RESOURCES] = "resources" | |
764 | }; | |
765 | ||
766 | DEFINE_STRING_TABLE_LOOKUP(timer_result, TimerResult); | |
767 | ||
87f0e418 | 768 | const UnitVTable timer_vtable = { |
7d17cfbc | 769 | .object_size = sizeof(Timer), |
718db961 | 770 | |
f975e971 LP |
771 | .sections = |
772 | "Unit\0" | |
773 | "Timer\0" | |
774 | "Install\0", | |
d8a812d1 | 775 | .private_section = "Timer", |
5cb5a6ff | 776 | |
871d7de4 | 777 | .init = timer_init, |
034c6ed7 | 778 | .done = timer_done, |
871d7de4 LP |
779 | .load = timer_load, |
780 | ||
781 | .coldplug = timer_coldplug, | |
782 | ||
783 | .dump = timer_dump, | |
784 | ||
785 | .start = timer_start, | |
786 | .stop = timer_stop, | |
787 | ||
788 | .serialize = timer_serialize, | |
789 | .deserialize_item = timer_deserialize_item, | |
790 | ||
791 | .active_state = timer_active_state, | |
792 | .sub_state_to_string = timer_sub_state_to_string, | |
793 | ||
3ecaa09b LP |
794 | .trigger_notify = timer_trigger_notify, |
795 | ||
fdf20a31 | 796 | .reset_failed = timer_reset_failed, |
8742514c | 797 | .time_change = timer_time_change, |
5632e374 | 798 | |
718db961 | 799 | .bus_vtable = bus_timer_vtable, |
d8a812d1 WC |
800 | .bus_set_property = bus_timer_set_property, |
801 | ||
802 | .can_transient = true, | |
5cb5a6ff | 803 | }; |