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Commit | Line | Data |
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a7334b09 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
a7334b09 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
d46de8a1 LP |
20 | #include <errno.h> |
21 | ||
b5efdb8a | 22 | #include "alloc-util.h" |
07630cea LP |
23 | #include "bus-error.h" |
24 | #include "bus-util.h" | |
871d7de4 | 25 | #include "dbus-timer.h" |
f4f15635 | 26 | #include "fs-util.h" |
6bedfcbb | 27 | #include "parse-util.h" |
744c7693 | 28 | #include "random-util.h" |
a40eb732 | 29 | #include "special.h" |
8b43440b | 30 | #include "string-table.h" |
07630cea | 31 | #include "string-util.h" |
b1d4f8e1 | 32 | #include "timer.h" |
07630cea LP |
33 | #include "unit-name.h" |
34 | #include "unit.h" | |
b1d4f8e1 | 35 | #include "user-util.h" |
c1d9ba99 | 36 | #include "virt.h" |
871d7de4 LP |
37 | |
38 | static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = { | |
39 | [TIMER_DEAD] = UNIT_INACTIVE, | |
40 | [TIMER_WAITING] = UNIT_ACTIVE, | |
41 | [TIMER_RUNNING] = UNIT_ACTIVE, | |
42 | [TIMER_ELAPSED] = UNIT_ACTIVE, | |
fdf20a31 | 43 | [TIMER_FAILED] = UNIT_FAILED |
871d7de4 LP |
44 | }; |
45 | ||
718db961 LP |
46 | static int timer_dispatch(sd_event_source *s, uint64_t usec, void *userdata); |
47 | ||
871d7de4 LP |
48 | static void timer_init(Unit *u) { |
49 | Timer *t = TIMER(u); | |
50 | ||
51 | assert(u); | |
ac155bb8 | 52 | assert(u->load_state == UNIT_STUB); |
871d7de4 | 53 | |
3a43da28 KS |
54 | t->next_elapse_monotonic_or_boottime = USEC_INFINITY; |
55 | t->next_elapse_realtime = USEC_INFINITY; | |
bd8f585b | 56 | t->accuracy_usec = u->manager->default_timer_accuracy_usec; |
3e0c30ac | 57 | t->remain_after_elapse = true; |
871d7de4 | 58 | } |
5cb5a6ff | 59 | |
74051b9b | 60 | void timer_free_values(Timer *t) { |
871d7de4 LP |
61 | TimerValue *v; |
62 | ||
63 | assert(t); | |
64 | ||
65 | while ((v = t->values)) { | |
71fda00f | 66 | LIST_REMOVE(value, t->values, v); |
3e044c49 | 67 | calendar_spec_free(v->calendar_spec); |
871d7de4 LP |
68 | free(v); |
69 | } | |
74051b9b LP |
70 | } |
71 | ||
72 | static void timer_done(Unit *u) { | |
73 | Timer *t = TIMER(u); | |
74 | ||
75 | assert(t); | |
76 | ||
77 | timer_free_values(t); | |
871d7de4 | 78 | |
718db961 LP |
79 | t->monotonic_event_source = sd_event_source_unref(t->monotonic_event_source); |
80 | t->realtime_event_source = sd_event_source_unref(t->realtime_event_source); | |
06642d17 LP |
81 | |
82 | free(t->stamp_path); | |
871d7de4 LP |
83 | } |
84 | ||
85 | static int timer_verify(Timer *t) { | |
86 | assert(t); | |
87 | ||
1124fe6f | 88 | if (UNIT(t)->load_state != UNIT_LOADED) |
871d7de4 LP |
89 | return 0; |
90 | ||
91 | if (!t->values) { | |
f2341e0a | 92 | log_unit_error(UNIT(t), "Timer unit lacks value setting. Refusing."); |
871d7de4 LP |
93 | return -EINVAL; |
94 | } | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
6c155fe3 LP |
99 | static int timer_add_default_dependencies(Timer *t) { |
100 | int r; | |
19f8d037 | 101 | TimerValue *v; |
6c155fe3 LP |
102 | |
103 | assert(t); | |
104 | ||
4c9ea260 LP |
105 | if (!UNIT(t)->default_dependencies) |
106 | return 0; | |
107 | ||
e3d84721 LP |
108 | r = unit_add_dependency_by_name(UNIT(t), UNIT_BEFORE, SPECIAL_TIMERS_TARGET, NULL, true); |
109 | if (r < 0) | |
110 | return r; | |
2a77d31d | 111 | |
463d0d15 | 112 | if (MANAGER_IS_SYSTEM(UNIT(t)->manager)) { |
36697dc0 LP |
113 | r = unit_add_two_dependencies_by_name(UNIT(t), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true); |
114 | if (r < 0) | |
6c155fe3 | 115 | return r; |
19f8d037 TGR |
116 | |
117 | LIST_FOREACH(value, v, t->values) { | |
118 | if (v->base == TIMER_CALENDAR) { | |
119 | r = unit_add_dependency_by_name(UNIT(t), UNIT_AFTER, SPECIAL_TIME_SYNC_TARGET, NULL, true); | |
120 | if (r < 0) | |
121 | return r; | |
122 | break; | |
123 | } | |
124 | } | |
2a77d31d | 125 | } |
6c155fe3 | 126 | |
ead8e478 | 127 | return unit_add_two_dependencies_by_name(UNIT(t), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true); |
6c155fe3 LP |
128 | } |
129 | ||
06642d17 LP |
130 | static int timer_setup_persistent(Timer *t) { |
131 | int r; | |
132 | ||
133 | assert(t); | |
134 | ||
135 | if (!t->persistent) | |
136 | return 0; | |
137 | ||
463d0d15 | 138 | if (MANAGER_IS_SYSTEM(UNIT(t)->manager)) { |
06642d17 LP |
139 | |
140 | r = unit_require_mounts_for(UNIT(t), "/var/lib/systemd/timers"); | |
141 | if (r < 0) | |
142 | return r; | |
143 | ||
144 | t->stamp_path = strappend("/var/lib/systemd/timers/stamp-", UNIT(t)->id); | |
145 | } else { | |
146 | const char *e; | |
147 | ||
148 | e = getenv("XDG_DATA_HOME"); | |
149 | if (e) | |
605405c6 | 150 | t->stamp_path = strjoin(e, "/systemd/timers/stamp-", UNIT(t)->id); |
06642d17 LP |
151 | else { |
152 | ||
153 | _cleanup_free_ char *h = NULL; | |
154 | ||
155 | r = get_home_dir(&h); | |
23bbb0de | 156 | if (r < 0) |
f2341e0a | 157 | return log_unit_error_errno(UNIT(t), r, "Failed to determine home directory: %m"); |
06642d17 | 158 | |
605405c6 | 159 | t->stamp_path = strjoin(h, "/.local/share/systemd/timers/stamp-", UNIT(t)->id); |
06642d17 LP |
160 | } |
161 | } | |
162 | ||
163 | if (!t->stamp_path) | |
164 | return log_oom(); | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
871d7de4 LP |
169 | static int timer_load(Unit *u) { |
170 | Timer *t = TIMER(u); | |
171 | int r; | |
172 | ||
173 | assert(u); | |
ac155bb8 | 174 | assert(u->load_state == UNIT_STUB); |
871d7de4 | 175 | |
36697dc0 LP |
176 | r = unit_load_fragment_and_dropin(u); |
177 | if (r < 0) | |
871d7de4 LP |
178 | return r; |
179 | ||
ac155bb8 | 180 | if (u->load_state == UNIT_LOADED) { |
871d7de4 | 181 | |
3ecaa09b | 182 | if (set_isempty(u->dependencies[UNIT_TRIGGERS])) { |
57020a3a LP |
183 | Unit *x; |
184 | ||
185 | r = unit_load_related_unit(u, ".service", &x); | |
186 | if (r < 0) | |
871d7de4 LP |
187 | return r; |
188 | ||
3ecaa09b LP |
189 | r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, x, true); |
190 | if (r < 0) | |
191 | return r; | |
57020a3a LP |
192 | } |
193 | ||
06642d17 LP |
194 | r = timer_setup_persistent(t); |
195 | if (r < 0) | |
196 | return r; | |
197 | ||
4c9ea260 LP |
198 | r = timer_add_default_dependencies(t); |
199 | if (r < 0) | |
200 | return r; | |
871d7de4 LP |
201 | } |
202 | ||
203 | return timer_verify(t); | |
204 | } | |
205 | ||
206 | static void timer_dump(Unit *u, FILE *f, const char *prefix) { | |
9f5eb56a | 207 | char buf[FORMAT_TIMESPAN_MAX]; |
871d7de4 | 208 | Timer *t = TIMER(u); |
3ecaa09b | 209 | Unit *trigger; |
871d7de4 | 210 | TimerValue *v; |
034c6ed7 | 211 | |
3ecaa09b LP |
212 | trigger = UNIT_TRIGGER(u); |
213 | ||
871d7de4 LP |
214 | fprintf(f, |
215 | "%sTimer State: %s\n" | |
067d72c9 | 216 | "%sResult: %s\n" |
9f5eb56a | 217 | "%sUnit: %s\n" |
dedabea4 LP |
218 | "%sPersistent: %s\n" |
219 | "%sWakeSystem: %s\n" | |
3e0c30ac LP |
220 | "%sAccuracy: %s\n" |
221 | "%sRemainAfterElapse: %s\n", | |
871d7de4 | 222 | prefix, timer_state_to_string(t->state), |
067d72c9 | 223 | prefix, timer_result_to_string(t->result), |
9f5eb56a | 224 | prefix, trigger ? trigger->id : "n/a", |
dedabea4 LP |
225 | prefix, yes_no(t->persistent), |
226 | prefix, yes_no(t->wake_system), | |
3e0c30ac LP |
227 | prefix, format_timespan(buf, sizeof(buf), t->accuracy_usec, 1), |
228 | prefix, yes_no(t->remain_after_elapse)); | |
871d7de4 | 229 | |
36697dc0 LP |
230 | LIST_FOREACH(value, v, t->values) { |
231 | ||
232 | if (v->base == TIMER_CALENDAR) { | |
233 | _cleanup_free_ char *p = NULL; | |
234 | ||
25cb94d4 | 235 | (void) calendar_spec_to_string(v->calendar_spec, &p); |
36697dc0 LP |
236 | |
237 | fprintf(f, | |
238 | "%s%s: %s\n", | |
239 | prefix, | |
240 | timer_base_to_string(v->base), | |
241 | strna(p)); | |
242 | } else { | |
243 | char timespan1[FORMAT_TIMESPAN_MAX]; | |
244 | ||
245 | fprintf(f, | |
246 | "%s%s: %s\n", | |
247 | prefix, | |
248 | timer_base_to_string(v->base), | |
b1d6dcf5 | 249 | format_timespan(timespan1, sizeof(timespan1), v->value, 0)); |
36697dc0 LP |
250 | } |
251 | } | |
871d7de4 LP |
252 | } |
253 | ||
254 | static void timer_set_state(Timer *t, TimerState state) { | |
255 | TimerState old_state; | |
034c6ed7 | 256 | assert(t); |
871d7de4 LP |
257 | |
258 | old_state = t->state; | |
259 | t->state = state; | |
260 | ||
36697dc0 | 261 | if (state != TIMER_WAITING) { |
718db961 LP |
262 | t->monotonic_event_source = sd_event_source_unref(t->monotonic_event_source); |
263 | t->realtime_event_source = sd_event_source_unref(t->realtime_event_source); | |
6e2c9ce1 ZJS |
264 | t->next_elapse_monotonic_or_boottime = USEC_INFINITY; |
265 | t->next_elapse_realtime = USEC_INFINITY; | |
36697dc0 | 266 | } |
871d7de4 LP |
267 | |
268 | if (state != old_state) | |
f2341e0a | 269 | log_unit_debug(UNIT(t), "Changed %s -> %s", timer_state_to_string(old_state), timer_state_to_string(state)); |
871d7de4 | 270 | |
e2f3b44c | 271 | unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true); |
871d7de4 LP |
272 | } |
273 | ||
274 | static void timer_enter_waiting(Timer *t, bool initial); | |
275 | ||
be847e82 | 276 | static int timer_coldplug(Unit *u) { |
871d7de4 LP |
277 | Timer *t = TIMER(u); |
278 | ||
279 | assert(t); | |
280 | assert(t->state == TIMER_DEAD); | |
281 | ||
3e0c30ac LP |
282 | if (t->deserialized_state == t->state) |
283 | return 0; | |
871d7de4 | 284 | |
3e0c30ac LP |
285 | if (t->deserialized_state == TIMER_WAITING) |
286 | timer_enter_waiting(t, false); | |
287 | else | |
288 | timer_set_state(t, t->deserialized_state); | |
871d7de4 LP |
289 | |
290 | return 0; | |
291 | } | |
292 | ||
067d72c9 | 293 | static void timer_enter_dead(Timer *t, TimerResult f) { |
871d7de4 LP |
294 | assert(t); |
295 | ||
a0fef983 | 296 | if (t->result == TIMER_SUCCESS) |
067d72c9 | 297 | t->result = f; |
871d7de4 | 298 | |
ed77d407 LP |
299 | if (t->result != TIMER_SUCCESS) |
300 | log_unit_warning(UNIT(t), "Failed with result '%s'.", timer_result_to_string(t->result)); | |
301 | ||
067d72c9 | 302 | timer_set_state(t, t->result != TIMER_SUCCESS ? TIMER_FAILED : TIMER_DEAD); |
871d7de4 LP |
303 | } |
304 | ||
3e0c30ac LP |
305 | static void timer_enter_elapsed(Timer *t, bool leave_around) { |
306 | assert(t); | |
307 | ||
308 | /* If a unit is marked with RemainAfterElapse=yes we leave it | |
309 | * around even after it elapsed once, so that starting it | |
310 | * later again does not necessarily mean immediate | |
311 | * retriggering. We unconditionally leave units with | |
312 | * TIMER_UNIT_ACTIVE or TIMER_UNIT_INACTIVE triggers around, | |
313 | * since they might be restarted automatically at any time | |
314 | * later on. */ | |
315 | ||
316 | if (t->remain_after_elapse || leave_around) | |
317 | timer_set_state(t, TIMER_ELAPSED); | |
318 | else | |
319 | timer_enter_dead(t, TIMER_SUCCESS); | |
320 | } | |
321 | ||
744c7693 LP |
322 | static void add_random(Timer *t, usec_t *v) { |
323 | char s[FORMAT_TIMESPAN_MAX]; | |
324 | usec_t add; | |
325 | ||
326 | assert(t); | |
3f51aec8 | 327 | assert(v); |
744c7693 LP |
328 | |
329 | if (t->random_usec == 0) | |
330 | return; | |
331 | if (*v == USEC_INFINITY) | |
332 | return; | |
333 | ||
334 | add = random_u64() % t->random_usec; | |
335 | ||
336 | if (*v + add < *v) /* overflow */ | |
337 | *v = (usec_t) -2; /* Highest possible value, that is not USEC_INFINITY */ | |
338 | else | |
339 | *v += add; | |
340 | ||
382852fd | 341 | log_unit_debug(UNIT(t), "Adding %s random time.", format_timespan(s, sizeof(s), add, 0)); |
744c7693 LP |
342 | } |
343 | ||
871d7de4 | 344 | static void timer_enter_waiting(Timer *t, bool initial) { |
36697dc0 | 345 | bool found_monotonic = false, found_realtime = false; |
3e0c30ac | 346 | bool leave_around = false; |
c54be90b LP |
347 | triple_timestamp ts; |
348 | usec_t base = 0; | |
dedabea4 | 349 | TimerValue *v; |
e903182e | 350 | Unit *trigger; |
871d7de4 LP |
351 | int r; |
352 | ||
e903182e LP |
353 | assert(t); |
354 | ||
355 | trigger = UNIT_TRIGGER(UNIT(t)); | |
356 | if (!trigger) { | |
357 | log_unit_error(UNIT(t), "Unit to trigger vanished."); | |
358 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); | |
359 | return; | |
360 | } | |
361 | ||
c54be90b | 362 | triple_timestamp_get(&ts); |
dedabea4 | 363 | t->next_elapse_monotonic_or_boottime = t->next_elapse_realtime = 0; |
871d7de4 LP |
364 | |
365 | LIST_FOREACH(value, v, t->values) { | |
366 | ||
367 | if (v->disabled) | |
368 | continue; | |
369 | ||
36697dc0 | 370 | if (v->base == TIMER_CALENDAR) { |
06642d17 LP |
371 | usec_t b; |
372 | ||
373 | /* If we know the last time this was | |
374 | * triggered, schedule the job based relative | |
375 | * to that. If we don't just start from | |
376 | * now. */ | |
36697dc0 | 377 | |
c54be90b | 378 | b = t->last_trigger.realtime > 0 ? t->last_trigger.realtime : ts.realtime; |
06642d17 LP |
379 | |
380 | r = calendar_spec_next_usec(v->calendar_spec, b, &v->next_elapse); | |
36697dc0 LP |
381 | if (r < 0) |
382 | continue; | |
383 | ||
36697dc0 LP |
384 | if (!found_realtime) |
385 | t->next_elapse_realtime = v->next_elapse; | |
10717a1a | 386 | else |
36697dc0 | 387 | t->next_elapse_realtime = MIN(t->next_elapse_realtime, v->next_elapse); |
871d7de4 | 388 | |
36697dc0 | 389 | found_realtime = true; |
871d7de4 | 390 | |
36697dc0 | 391 | } else { |
c54be90b | 392 | |
36697dc0 | 393 | switch (v->base) { |
871d7de4 | 394 | |
36697dc0 LP |
395 | case TIMER_ACTIVE: |
396 | if (state_translation_table[t->state] == UNIT_ACTIVE) | |
397 | base = UNIT(t)->inactive_exit_timestamp.monotonic; | |
398 | else | |
c54be90b | 399 | base = ts.monotonic; |
36697dc0 | 400 | break; |
871d7de4 | 401 | |
36697dc0 | 402 | case TIMER_BOOT: |
c1d9ba99 MS |
403 | if (detect_container() <= 0) { |
404 | /* CLOCK_MONOTONIC equals the uptime on Linux */ | |
405 | base = 0; | |
406 | break; | |
407 | } | |
408 | /* In a container we don't want to include the time the host | |
409 | * was already up when the container started, so count from | |
ec251fe7 ZJS |
410 | * our own startup. */ |
411 | /* fall through */ | |
36697dc0 LP |
412 | case TIMER_STARTUP: |
413 | base = UNIT(t)->manager->userspace_timestamp.monotonic; | |
414 | break; | |
871d7de4 | 415 | |
36697dc0 | 416 | case TIMER_UNIT_ACTIVE: |
3e0c30ac | 417 | leave_around = true; |
e903182e | 418 | base = trigger->inactive_exit_timestamp.monotonic; |
e41e1943 LP |
419 | |
420 | if (base <= 0) | |
06642d17 | 421 | base = t->last_trigger.monotonic; |
e41e1943 LP |
422 | |
423 | if (base <= 0) | |
36697dc0 | 424 | continue; |
871d7de4 | 425 | |
36697dc0 | 426 | break; |
871d7de4 | 427 | |
36697dc0 | 428 | case TIMER_UNIT_INACTIVE: |
3e0c30ac | 429 | leave_around = true; |
e903182e | 430 | base = trigger->inactive_enter_timestamp.monotonic; |
e41e1943 LP |
431 | |
432 | if (base <= 0) | |
06642d17 | 433 | base = t->last_trigger.monotonic; |
e41e1943 LP |
434 | |
435 | if (base <= 0) | |
36697dc0 | 436 | continue; |
871d7de4 | 437 | |
36697dc0 | 438 | break; |
871d7de4 | 439 | |
36697dc0 LP |
440 | default: |
441 | assert_not_reached("Unknown timer base"); | |
442 | } | |
871d7de4 | 443 | |
c54be90b | 444 | v->next_elapse = usec_add(usec_shift_clock(base, CLOCK_MONOTONIC, TIMER_MONOTONIC_CLOCK(t)), v->value); |
36697dc0 | 445 | |
c54be90b LP |
446 | if (!initial && |
447 | v->next_elapse < triple_timestamp_by_clock(&ts, TIMER_MONOTONIC_CLOCK(t)) && | |
448 | IN_SET(v->base, TIMER_ACTIVE, TIMER_BOOT, TIMER_STARTUP)) { | |
e41e1943 | 449 | /* This is a one time trigger, disable it now */ |
36697dc0 LP |
450 | v->disabled = true; |
451 | continue; | |
452 | } | |
453 | ||
454 | if (!found_monotonic) | |
dedabea4 | 455 | t->next_elapse_monotonic_or_boottime = v->next_elapse; |
36697dc0 | 456 | else |
dedabea4 | 457 | t->next_elapse_monotonic_or_boottime = MIN(t->next_elapse_monotonic_or_boottime, v->next_elapse); |
36697dc0 LP |
458 | |
459 | found_monotonic = true; | |
460 | } | |
871d7de4 LP |
461 | } |
462 | ||
36697dc0 | 463 | if (!found_monotonic && !found_realtime) { |
f2341e0a | 464 | log_unit_debug(UNIT(t), "Timer is elapsed."); |
3e0c30ac | 465 | timer_enter_elapsed(t, leave_around); |
871d7de4 LP |
466 | return; |
467 | } | |
468 | ||
36697dc0 LP |
469 | if (found_monotonic) { |
470 | char buf[FORMAT_TIMESPAN_MAX]; | |
3e0c30ac | 471 | usec_t left; |
dedabea4 | 472 | |
744c7693 LP |
473 | add_random(t, &t->next_elapse_monotonic_or_boottime); |
474 | ||
c54be90b | 475 | left = usec_sub_unsigned(t->next_elapse_monotonic_or_boottime, triple_timestamp_by_clock(&ts, TIMER_MONOTONIC_CLOCK(t))); |
3e0c30ac | 476 | log_unit_debug(UNIT(t), "Monotonic timer elapses in %s.", format_timespan(buf, sizeof(buf), left, 0)); |
871d7de4 | 477 | |
718db961 | 478 | if (t->monotonic_event_source) { |
dedabea4 | 479 | r = sd_event_source_set_time(t->monotonic_event_source, t->next_elapse_monotonic_or_boottime); |
718db961 LP |
480 | if (r < 0) |
481 | goto fail; | |
482 | ||
483 | r = sd_event_source_set_enabled(t->monotonic_event_source, SD_EVENT_ONESHOT); | |
cbf60d0a LP |
484 | if (r < 0) |
485 | goto fail; | |
486 | } else { | |
487 | ||
6a0f1f6d LP |
488 | r = sd_event_add_time( |
489 | UNIT(t)->manager->event, | |
490 | &t->monotonic_event_source, | |
dedabea4 LP |
491 | t->wake_system ? CLOCK_BOOTTIME_ALARM : CLOCK_MONOTONIC, |
492 | t->next_elapse_monotonic_or_boottime, t->accuracy_usec, | |
6a0f1f6d | 493 | timer_dispatch, t); |
cbf60d0a LP |
494 | if (r < 0) |
495 | goto fail; | |
718db961 | 496 | |
cbf60d0a LP |
497 | (void) sd_event_source_set_description(t->monotonic_event_source, "timer-monotonic"); |
498 | } | |
7dfbe2e3 | 499 | |
718db961 | 500 | } else if (t->monotonic_event_source) { |
718db961 | 501 | |
06642d17 | 502 | r = sd_event_source_set_enabled(t->monotonic_event_source, SD_EVENT_OFF); |
718db961 LP |
503 | if (r < 0) |
504 | goto fail; | |
505 | } | |
36697dc0 LP |
506 | |
507 | if (found_realtime) { | |
508 | char buf[FORMAT_TIMESTAMP_MAX]; | |
744c7693 LP |
509 | |
510 | add_random(t, &t->next_elapse_realtime); | |
511 | ||
f2341e0a | 512 | log_unit_debug(UNIT(t), "Realtime timer elapses at %s.", format_timestamp(buf, sizeof(buf), t->next_elapse_realtime)); |
36697dc0 | 513 | |
718db961 LP |
514 | if (t->realtime_event_source) { |
515 | r = sd_event_source_set_time(t->realtime_event_source, t->next_elapse_realtime); | |
516 | if (r < 0) | |
517 | goto fail; | |
518 | ||
519 | r = sd_event_source_set_enabled(t->realtime_event_source, SD_EVENT_ONESHOT); | |
cbf60d0a LP |
520 | if (r < 0) |
521 | goto fail; | |
522 | } else { | |
6a0f1f6d LP |
523 | r = sd_event_add_time( |
524 | UNIT(t)->manager->event, | |
525 | &t->realtime_event_source, | |
dedabea4 | 526 | t->wake_system ? CLOCK_REALTIME_ALARM : CLOCK_REALTIME, |
6a0f1f6d LP |
527 | t->next_elapse_realtime, t->accuracy_usec, |
528 | timer_dispatch, t); | |
cbf60d0a LP |
529 | if (r < 0) |
530 | goto fail; | |
718db961 | 531 | |
cbf60d0a LP |
532 | (void) sd_event_source_set_description(t->realtime_event_source, "timer-realtime"); |
533 | } | |
7dfbe2e3 | 534 | |
718db961 | 535 | } else if (t->realtime_event_source) { |
718db961 | 536 | |
06642d17 | 537 | r = sd_event_source_set_enabled(t->realtime_event_source, SD_EVENT_OFF); |
718db961 LP |
538 | if (r < 0) |
539 | goto fail; | |
540 | } | |
871d7de4 LP |
541 | |
542 | timer_set_state(t, TIMER_WAITING); | |
543 | return; | |
544 | ||
545 | fail: | |
f2341e0a | 546 | log_unit_warning_errno(UNIT(t), r, "Failed to enter waiting state: %m"); |
067d72c9 | 547 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); |
871d7de4 LP |
548 | } |
549 | ||
550 | static void timer_enter_running(Timer *t) { | |
4afd3348 | 551 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
e903182e | 552 | Unit *trigger; |
871d7de4 | 553 | int r; |
398ef8ba | 554 | |
871d7de4 LP |
555 | assert(t); |
556 | ||
ba3e67a7 | 557 | /* Don't start job if we are supposed to go down */ |
31afa0a4 | 558 | if (unit_stop_pending(UNIT(t))) |
ba3e67a7 LP |
559 | return; |
560 | ||
e903182e LP |
561 | trigger = UNIT_TRIGGER(UNIT(t)); |
562 | if (!trigger) { | |
563 | log_unit_error(UNIT(t), "Unit to trigger vanished."); | |
564 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); | |
565 | return; | |
566 | } | |
567 | ||
568 | r = manager_add_job(UNIT(t)->manager, JOB_START, trigger, JOB_REPLACE, &error, NULL); | |
36697dc0 | 569 | if (r < 0) |
871d7de4 LP |
570 | goto fail; |
571 | ||
06642d17 LP |
572 | dual_timestamp_get(&t->last_trigger); |
573 | ||
472fc28f | 574 | if (t->stamp_path) |
ee735086 | 575 | touch_file(t->stamp_path, true, t->last_trigger.realtime, UID_INVALID, GID_INVALID, MODE_INVALID); |
e41e1943 | 576 | |
871d7de4 LP |
577 | timer_set_state(t, TIMER_RUNNING); |
578 | return; | |
579 | ||
580 | fail: | |
f2341e0a | 581 | log_unit_warning(UNIT(t), "Failed to queue unit startup job: %s", bus_error_message(&error, r)); |
067d72c9 | 582 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); |
871d7de4 LP |
583 | } |
584 | ||
585 | static int timer_start(Unit *u) { | |
586 | Timer *t = TIMER(u); | |
779042e7 | 587 | TimerValue *v; |
e903182e | 588 | Unit *trigger; |
07299350 | 589 | int r; |
871d7de4 LP |
590 | |
591 | assert(t); | |
3742095b | 592 | assert(IN_SET(t->state, TIMER_DEAD, TIMER_FAILED)); |
01f78473 | 593 | |
e903182e LP |
594 | trigger = UNIT_TRIGGER(u); |
595 | if (!trigger || trigger->load_state != UNIT_LOADED) { | |
596 | log_unit_error(u, "Refusing to start, unit to trigger not loaded."); | |
01f78473 | 597 | return -ENOENT; |
e903182e | 598 | } |
871d7de4 | 599 | |
07299350 LP |
600 | r = unit_start_limit_test(u); |
601 | if (r < 0) { | |
602 | timer_enter_dead(t, TIMER_FAILURE_START_LIMIT_HIT); | |
603 | return r; | |
604 | } | |
605 | ||
4b58153d LP |
606 | r = unit_acquire_invocation_id(u); |
607 | if (r < 0) | |
608 | return r; | |
609 | ||
06642d17 LP |
610 | t->last_trigger = DUAL_TIMESTAMP_NULL; |
611 | ||
779042e7 MC |
612 | /* Reenable all timers that depend on unit activation time */ |
613 | LIST_FOREACH(value, v, t->values) | |
614 | if (v->base == TIMER_ACTIVE) | |
615 | v->disabled = false; | |
616 | ||
06642d17 LP |
617 | if (t->stamp_path) { |
618 | struct stat st; | |
619 | ||
77542a79 LP |
620 | if (stat(t->stamp_path, &st) >= 0) { |
621 | usec_t ft; | |
622 | ||
623 | /* Load the file timestamp, but only if it is actually in the past. If it is in the future, | |
624 | * something is wrong with the system clock. */ | |
625 | ||
626 | ft = timespec_load(&st.st_mtim); | |
627 | if (ft < now(CLOCK_REALTIME)) | |
628 | t->last_trigger.realtime = ft; | |
629 | else { | |
630 | char z[FORMAT_TIMESTAMP_MAX]; | |
631 | ||
632 | log_unit_warning(u, "Not using persistent file timestamp %s as it is in the future.", | |
633 | format_timestamp(z, sizeof(z), ft)); | |
634 | } | |
635 | ||
636 | } else if (errno == ENOENT) | |
472fc28f TB |
637 | /* The timer has never run before, |
638 | * make sure a stamp file exists. | |
639 | */ | |
4b58153d | 640 | (void) touch_file(t->stamp_path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, MODE_INVALID); |
06642d17 LP |
641 | } |
642 | ||
067d72c9 | 643 | t->result = TIMER_SUCCESS; |
871d7de4 | 644 | timer_enter_waiting(t, true); |
82a2b6bb | 645 | return 1; |
871d7de4 LP |
646 | } |
647 | ||
648 | static int timer_stop(Unit *u) { | |
649 | Timer *t = TIMER(u); | |
650 | ||
651 | assert(t); | |
3742095b | 652 | assert(IN_SET(t->state, TIMER_WAITING, TIMER_RUNNING, TIMER_ELAPSED)); |
871d7de4 | 653 | |
067d72c9 | 654 | timer_enter_dead(t, TIMER_SUCCESS); |
82a2b6bb | 655 | return 1; |
871d7de4 LP |
656 | } |
657 | ||
658 | static int timer_serialize(Unit *u, FILE *f, FDSet *fds) { | |
659 | Timer *t = TIMER(u); | |
660 | ||
661 | assert(u); | |
662 | assert(f); | |
663 | assert(fds); | |
664 | ||
665 | unit_serialize_item(u, f, "state", timer_state_to_string(t->state)); | |
067d72c9 | 666 | unit_serialize_item(u, f, "result", timer_result_to_string(t->result)); |
871d7de4 | 667 | |
06642d17 LP |
668 | if (t->last_trigger.realtime > 0) |
669 | unit_serialize_item_format(u, f, "last-trigger-realtime", "%" PRIu64, t->last_trigger.realtime); | |
670 | ||
671 | if (t->last_trigger.monotonic > 0) | |
672 | unit_serialize_item_format(u, f, "last-trigger-monotonic", "%" PRIu64, t->last_trigger.monotonic); | |
673 | ||
871d7de4 LP |
674 | return 0; |
675 | } | |
676 | ||
677 | static int timer_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
678 | Timer *t = TIMER(u); | |
06642d17 | 679 | int r; |
871d7de4 LP |
680 | |
681 | assert(u); | |
682 | assert(key); | |
683 | assert(value); | |
684 | assert(fds); | |
685 | ||
686 | if (streq(key, "state")) { | |
687 | TimerState state; | |
688 | ||
36697dc0 LP |
689 | state = timer_state_from_string(value); |
690 | if (state < 0) | |
f2341e0a | 691 | log_unit_debug(u, "Failed to parse state value: %s", value); |
871d7de4 LP |
692 | else |
693 | t->deserialized_state = state; | |
067d72c9 LP |
694 | } else if (streq(key, "result")) { |
695 | TimerResult f; | |
696 | ||
697 | f = timer_result_from_string(value); | |
698 | if (f < 0) | |
f2341e0a | 699 | log_unit_debug(u, "Failed to parse result value: %s", value); |
067d72c9 LP |
700 | else if (f != TIMER_SUCCESS) |
701 | t->result = f; | |
06642d17 LP |
702 | } else if (streq(key, "last-trigger-realtime")) { |
703 | ||
704 | r = safe_atou64(value, &t->last_trigger.realtime); | |
705 | if (r < 0) | |
f2341e0a | 706 | log_unit_debug(u, "Failed to parse last-trigger-realtime value: %s", value); |
06642d17 LP |
707 | |
708 | } else if (streq(key, "last-trigger-monotonic")) { | |
709 | ||
710 | r = safe_atou64(value, &t->last_trigger.monotonic); | |
711 | if (r < 0) | |
f2341e0a | 712 | log_unit_debug(u, "Failed to parse last-trigger-monotonic value: %s", value); |
067d72c9 | 713 | |
871d7de4 | 714 | } else |
f2341e0a | 715 | log_unit_debug(u, "Unknown serialization key: %s", key); |
871d7de4 LP |
716 | |
717 | return 0; | |
034c6ed7 LP |
718 | } |
719 | ||
44a6b1b6 | 720 | _pure_ static UnitActiveState timer_active_state(Unit *u) { |
871d7de4 LP |
721 | assert(u); |
722 | ||
723 | return state_translation_table[TIMER(u)->state]; | |
724 | } | |
725 | ||
44a6b1b6 | 726 | _pure_ static const char *timer_sub_state_to_string(Unit *u) { |
871d7de4 LP |
727 | assert(u); |
728 | ||
729 | return timer_state_to_string(TIMER(u)->state); | |
730 | } | |
731 | ||
718db961 LP |
732 | static int timer_dispatch(sd_event_source *s, uint64_t usec, void *userdata) { |
733 | Timer *t = TIMER(userdata); | |
871d7de4 LP |
734 | |
735 | assert(t); | |
5cb5a6ff | 736 | |
871d7de4 | 737 | if (t->state != TIMER_WAITING) |
718db961 | 738 | return 0; |
5cb5a6ff | 739 | |
f2341e0a | 740 | log_unit_debug(UNIT(t), "Timer elapsed."); |
871d7de4 | 741 | timer_enter_running(t); |
718db961 | 742 | return 0; |
5cb5a6ff LP |
743 | } |
744 | ||
3ecaa09b LP |
745 | static void timer_trigger_notify(Unit *u, Unit *other) { |
746 | Timer *t = TIMER(u); | |
747 | TimerValue *v; | |
871d7de4 | 748 | |
3ecaa09b LP |
749 | assert(u); |
750 | assert(other); | |
871d7de4 | 751 | |
3ecaa09b LP |
752 | if (other->load_state != UNIT_LOADED) |
753 | return; | |
871d7de4 | 754 | |
3ecaa09b LP |
755 | /* Reenable all timers that depend on unit state */ |
756 | LIST_FOREACH(value, v, t->values) | |
3742095b | 757 | if (IN_SET(v->base, TIMER_UNIT_ACTIVE, TIMER_UNIT_INACTIVE)) |
3ecaa09b | 758 | v->disabled = false; |
01f78473 | 759 | |
3ecaa09b | 760 | switch (t->state) { |
871d7de4 | 761 | |
3ecaa09b LP |
762 | case TIMER_WAITING: |
763 | case TIMER_ELAPSED: | |
871d7de4 | 764 | |
3ecaa09b LP |
765 | /* Recalculate sleep time */ |
766 | timer_enter_waiting(t, false); | |
767 | break; | |
871d7de4 | 768 | |
3ecaa09b | 769 | case TIMER_RUNNING: |
871d7de4 | 770 | |
3ecaa09b | 771 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { |
f2341e0a | 772 | log_unit_debug(UNIT(t), "Got notified about unit deactivation."); |
871d7de4 | 773 | timer_enter_waiting(t, false); |
3ecaa09b LP |
774 | } |
775 | break; | |
871d7de4 | 776 | |
3ecaa09b LP |
777 | case TIMER_DEAD: |
778 | case TIMER_FAILED: | |
779 | break; | |
871d7de4 | 780 | |
3ecaa09b LP |
781 | default: |
782 | assert_not_reached("Unknown timer state"); | |
871d7de4 | 783 | } |
871d7de4 LP |
784 | } |
785 | ||
fdf20a31 | 786 | static void timer_reset_failed(Unit *u) { |
5632e374 LP |
787 | Timer *t = TIMER(u); |
788 | ||
789 | assert(t); | |
790 | ||
fdf20a31 | 791 | if (t->state == TIMER_FAILED) |
5632e374 LP |
792 | timer_set_state(t, TIMER_DEAD); |
793 | ||
067d72c9 | 794 | t->result = TIMER_SUCCESS; |
5632e374 LP |
795 | } |
796 | ||
8742514c LP |
797 | static void timer_time_change(Unit *u) { |
798 | Timer *t = TIMER(u); | |
799 | ||
800 | assert(u); | |
801 | ||
802 | if (t->state != TIMER_WAITING) | |
803 | return; | |
804 | ||
f2341e0a | 805 | log_unit_debug(u, "Time change, recalculating next elapse."); |
8742514c LP |
806 | timer_enter_waiting(t, false); |
807 | } | |
808 | ||
871d7de4 | 809 | static const char* const timer_base_table[_TIMER_BASE_MAX] = { |
03fae018 LP |
810 | [TIMER_ACTIVE] = "OnActiveSec", |
811 | [TIMER_BOOT] = "OnBootSec", | |
812 | [TIMER_STARTUP] = "OnStartupSec", | |
813 | [TIMER_UNIT_ACTIVE] = "OnUnitActiveSec", | |
36697dc0 LP |
814 | [TIMER_UNIT_INACTIVE] = "OnUnitInactiveSec", |
815 | [TIMER_CALENDAR] = "OnCalendar" | |
871d7de4 LP |
816 | }; |
817 | ||
818 | DEFINE_STRING_TABLE_LOOKUP(timer_base, TimerBase); | |
819 | ||
067d72c9 LP |
820 | static const char* const timer_result_table[_TIMER_RESULT_MAX] = { |
821 | [TIMER_SUCCESS] = "success", | |
07299350 LP |
822 | [TIMER_FAILURE_RESOURCES] = "resources", |
823 | [TIMER_FAILURE_START_LIMIT_HIT] = "start-limit-hit", | |
067d72c9 LP |
824 | }; |
825 | ||
826 | DEFINE_STRING_TABLE_LOOKUP(timer_result, TimerResult); | |
827 | ||
87f0e418 | 828 | const UnitVTable timer_vtable = { |
7d17cfbc | 829 | .object_size = sizeof(Timer), |
718db961 | 830 | |
f975e971 LP |
831 | .sections = |
832 | "Unit\0" | |
833 | "Timer\0" | |
834 | "Install\0", | |
d8a812d1 | 835 | .private_section = "Timer", |
5cb5a6ff | 836 | |
871d7de4 | 837 | .init = timer_init, |
034c6ed7 | 838 | .done = timer_done, |
871d7de4 LP |
839 | .load = timer_load, |
840 | ||
841 | .coldplug = timer_coldplug, | |
842 | ||
843 | .dump = timer_dump, | |
844 | ||
845 | .start = timer_start, | |
846 | .stop = timer_stop, | |
847 | ||
848 | .serialize = timer_serialize, | |
849 | .deserialize_item = timer_deserialize_item, | |
850 | ||
851 | .active_state = timer_active_state, | |
852 | .sub_state_to_string = timer_sub_state_to_string, | |
853 | ||
3ecaa09b LP |
854 | .trigger_notify = timer_trigger_notify, |
855 | ||
fdf20a31 | 856 | .reset_failed = timer_reset_failed, |
8742514c | 857 | .time_change = timer_time_change, |
5632e374 | 858 | |
718db961 | 859 | .bus_vtable = bus_timer_vtable, |
d8a812d1 WC |
860 | .bus_set_property = bus_timer_set_property, |
861 | ||
862 | .can_transient = true, | |
5cb5a6ff | 863 | }; |