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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 | |
b2c23da8 | 112 | if (UNIT(t)->manager->running_as == MANAGER_SYSTEM) { |
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 | ||
b2c23da8 | 138 | if (UNIT(t)->manager->running_as == MANAGER_SYSTEM) { |
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) | |
bd34b310 | 150 | t->stamp_path = strjoin(e, "/systemd/timers/stamp-", UNIT(t)->id, NULL); |
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 LP |
158 | |
159 | t->stamp_path = strjoin(h, "/.local/share/systemd/timers/stamp-", UNIT(t)->id, NULL); | |
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 | ||
235 | calendar_spec_to_string(v->calendar_spec, &p); | |
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); | |
36697dc0 | 264 | } |
871d7de4 LP |
265 | |
266 | if (state != old_state) | |
f2341e0a | 267 | log_unit_debug(UNIT(t), "Changed %s -> %s", timer_state_to_string(old_state), timer_state_to_string(state)); |
871d7de4 | 268 | |
e2f3b44c | 269 | unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true); |
871d7de4 LP |
270 | } |
271 | ||
272 | static void timer_enter_waiting(Timer *t, bool initial); | |
273 | ||
be847e82 | 274 | static int timer_coldplug(Unit *u) { |
871d7de4 LP |
275 | Timer *t = TIMER(u); |
276 | ||
277 | assert(t); | |
278 | assert(t->state == TIMER_DEAD); | |
279 | ||
3e0c30ac LP |
280 | if (t->deserialized_state == t->state) |
281 | return 0; | |
871d7de4 | 282 | |
3e0c30ac LP |
283 | if (t->deserialized_state == TIMER_WAITING) |
284 | timer_enter_waiting(t, false); | |
285 | else | |
286 | timer_set_state(t, t->deserialized_state); | |
871d7de4 LP |
287 | |
288 | return 0; | |
289 | } | |
290 | ||
067d72c9 | 291 | static void timer_enter_dead(Timer *t, TimerResult f) { |
871d7de4 LP |
292 | assert(t); |
293 | ||
067d72c9 LP |
294 | if (f != TIMER_SUCCESS) |
295 | t->result = f; | |
871d7de4 | 296 | |
067d72c9 | 297 | timer_set_state(t, t->result != TIMER_SUCCESS ? TIMER_FAILED : TIMER_DEAD); |
871d7de4 LP |
298 | } |
299 | ||
3e0c30ac LP |
300 | static void timer_enter_elapsed(Timer *t, bool leave_around) { |
301 | assert(t); | |
302 | ||
303 | /* If a unit is marked with RemainAfterElapse=yes we leave it | |
304 | * around even after it elapsed once, so that starting it | |
305 | * later again does not necessarily mean immediate | |
306 | * retriggering. We unconditionally leave units with | |
307 | * TIMER_UNIT_ACTIVE or TIMER_UNIT_INACTIVE triggers around, | |
308 | * since they might be restarted automatically at any time | |
309 | * later on. */ | |
310 | ||
311 | if (t->remain_after_elapse || leave_around) | |
312 | timer_set_state(t, TIMER_ELAPSED); | |
313 | else | |
314 | timer_enter_dead(t, TIMER_SUCCESS); | |
315 | } | |
316 | ||
dedabea4 LP |
317 | static usec_t monotonic_to_boottime(usec_t t) { |
318 | usec_t a, b; | |
319 | ||
320 | if (t <= 0) | |
321 | return 0; | |
322 | ||
323 | a = now(CLOCK_BOOTTIME); | |
324 | b = now(CLOCK_MONOTONIC); | |
325 | ||
326 | if (t + a > b) | |
327 | return t + a - b; | |
328 | else | |
329 | return 0; | |
330 | } | |
331 | ||
744c7693 LP |
332 | static void add_random(Timer *t, usec_t *v) { |
333 | char s[FORMAT_TIMESPAN_MAX]; | |
334 | usec_t add; | |
335 | ||
336 | assert(t); | |
337 | assert(*v); | |
338 | ||
339 | if (t->random_usec == 0) | |
340 | return; | |
341 | if (*v == USEC_INFINITY) | |
342 | return; | |
343 | ||
344 | add = random_u64() % t->random_usec; | |
345 | ||
346 | if (*v + add < *v) /* overflow */ | |
347 | *v = (usec_t) -2; /* Highest possible value, that is not USEC_INFINITY */ | |
348 | else | |
349 | *v += add; | |
350 | ||
351 | log_unit_info(UNIT(t), "Adding %s random time.", format_timespan(s, sizeof(s), add, 0)); | |
352 | } | |
353 | ||
871d7de4 | 354 | static void timer_enter_waiting(Timer *t, bool initial) { |
36697dc0 | 355 | bool found_monotonic = false, found_realtime = false; |
dedabea4 LP |
356 | usec_t ts_realtime, ts_monotonic; |
357 | usec_t base = 0; | |
3e0c30ac | 358 | bool leave_around = false; |
dedabea4 | 359 | TimerValue *v; |
871d7de4 LP |
360 | int r; |
361 | ||
dedabea4 LP |
362 | /* If we shall wake the system we use the boottime clock |
363 | * rather than the monotonic clock. */ | |
364 | ||
365 | ts_realtime = now(CLOCK_REALTIME); | |
366 | ts_monotonic = now(t->wake_system ? CLOCK_BOOTTIME : CLOCK_MONOTONIC); | |
367 | t->next_elapse_monotonic_or_boottime = t->next_elapse_realtime = 0; | |
871d7de4 LP |
368 | |
369 | LIST_FOREACH(value, v, t->values) { | |
370 | ||
371 | if (v->disabled) | |
372 | continue; | |
373 | ||
36697dc0 | 374 | if (v->base == TIMER_CALENDAR) { |
06642d17 LP |
375 | usec_t b; |
376 | ||
377 | /* If we know the last time this was | |
378 | * triggered, schedule the job based relative | |
379 | * to that. If we don't just start from | |
380 | * now. */ | |
36697dc0 | 381 | |
dedabea4 | 382 | b = t->last_trigger.realtime > 0 ? t->last_trigger.realtime : ts_realtime; |
06642d17 LP |
383 | |
384 | r = calendar_spec_next_usec(v->calendar_spec, b, &v->next_elapse); | |
36697dc0 LP |
385 | if (r < 0) |
386 | continue; | |
387 | ||
36697dc0 LP |
388 | if (!found_realtime) |
389 | t->next_elapse_realtime = v->next_elapse; | |
10717a1a | 390 | else |
36697dc0 | 391 | t->next_elapse_realtime = MIN(t->next_elapse_realtime, v->next_elapse); |
871d7de4 | 392 | |
36697dc0 | 393 | found_realtime = true; |
871d7de4 | 394 | |
36697dc0 LP |
395 | } else { |
396 | switch (v->base) { | |
871d7de4 | 397 | |
36697dc0 LP |
398 | case TIMER_ACTIVE: |
399 | if (state_translation_table[t->state] == UNIT_ACTIVE) | |
400 | base = UNIT(t)->inactive_exit_timestamp.monotonic; | |
401 | else | |
dedabea4 | 402 | base = ts_monotonic; |
36697dc0 | 403 | break; |
871d7de4 | 404 | |
36697dc0 | 405 | case TIMER_BOOT: |
c1d9ba99 MS |
406 | if (detect_container() <= 0) { |
407 | /* CLOCK_MONOTONIC equals the uptime on Linux */ | |
408 | base = 0; | |
409 | break; | |
410 | } | |
411 | /* In a container we don't want to include the time the host | |
412 | * was already up when the container started, so count from | |
413 | * our own startup. Fall through. */ | |
36697dc0 LP |
414 | case TIMER_STARTUP: |
415 | base = UNIT(t)->manager->userspace_timestamp.monotonic; | |
416 | break; | |
871d7de4 | 417 | |
36697dc0 | 418 | case TIMER_UNIT_ACTIVE: |
3e0c30ac | 419 | leave_around = true; |
e41e1943 LP |
420 | base = UNIT_TRIGGER(UNIT(t))->inactive_exit_timestamp.monotonic; |
421 | ||
422 | if (base <= 0) | |
06642d17 | 423 | base = t->last_trigger.monotonic; |
e41e1943 LP |
424 | |
425 | if (base <= 0) | |
36697dc0 | 426 | continue; |
871d7de4 | 427 | |
36697dc0 | 428 | break; |
871d7de4 | 429 | |
36697dc0 | 430 | case TIMER_UNIT_INACTIVE: |
3e0c30ac | 431 | leave_around = true; |
e41e1943 LP |
432 | base = UNIT_TRIGGER(UNIT(t))->inactive_enter_timestamp.monotonic; |
433 | ||
434 | if (base <= 0) | |
06642d17 | 435 | base = t->last_trigger.monotonic; |
e41e1943 LP |
436 | |
437 | if (base <= 0) | |
36697dc0 | 438 | continue; |
871d7de4 | 439 | |
36697dc0 | 440 | break; |
871d7de4 | 441 | |
36697dc0 LP |
442 | default: |
443 | assert_not_reached("Unknown timer base"); | |
444 | } | |
871d7de4 | 445 | |
dedabea4 LP |
446 | if (t->wake_system) |
447 | base = monotonic_to_boottime(base); | |
448 | ||
36697dc0 LP |
449 | v->next_elapse = base + v->value; |
450 | ||
dedabea4 | 451 | if (!initial && v->next_elapse < ts_monotonic && IN_SET(v->base, TIMER_ACTIVE, TIMER_BOOT, TIMER_STARTUP)) { |
e41e1943 | 452 | /* This is a one time trigger, disable it now */ |
36697dc0 LP |
453 | v->disabled = true; |
454 | continue; | |
455 | } | |
456 | ||
457 | if (!found_monotonic) | |
dedabea4 | 458 | t->next_elapse_monotonic_or_boottime = v->next_elapse; |
36697dc0 | 459 | else |
dedabea4 | 460 | t->next_elapse_monotonic_or_boottime = MIN(t->next_elapse_monotonic_or_boottime, v->next_elapse); |
36697dc0 LP |
461 | |
462 | found_monotonic = true; | |
463 | } | |
871d7de4 LP |
464 | } |
465 | ||
36697dc0 | 466 | if (!found_monotonic && !found_realtime) { |
f2341e0a | 467 | log_unit_debug(UNIT(t), "Timer is elapsed."); |
3e0c30ac | 468 | timer_enter_elapsed(t, leave_around); |
871d7de4 LP |
469 | return; |
470 | } | |
471 | ||
36697dc0 LP |
472 | if (found_monotonic) { |
473 | char buf[FORMAT_TIMESPAN_MAX]; | |
3e0c30ac | 474 | usec_t left; |
dedabea4 | 475 | |
744c7693 LP |
476 | add_random(t, &t->next_elapse_monotonic_or_boottime); |
477 | ||
3e0c30ac LP |
478 | left = t->next_elapse_monotonic_or_boottime > ts_monotonic ? t->next_elapse_monotonic_or_boottime - ts_monotonic : 0; |
479 | log_unit_debug(UNIT(t), "Monotonic timer elapses in %s.", format_timespan(buf, sizeof(buf), left, 0)); | |
871d7de4 | 480 | |
718db961 | 481 | if (t->monotonic_event_source) { |
dedabea4 | 482 | r = sd_event_source_set_time(t->monotonic_event_source, t->next_elapse_monotonic_or_boottime); |
718db961 LP |
483 | if (r < 0) |
484 | goto fail; | |
485 | ||
486 | r = sd_event_source_set_enabled(t->monotonic_event_source, SD_EVENT_ONESHOT); | |
cbf60d0a LP |
487 | if (r < 0) |
488 | goto fail; | |
489 | } else { | |
490 | ||
6a0f1f6d LP |
491 | r = sd_event_add_time( |
492 | UNIT(t)->manager->event, | |
493 | &t->monotonic_event_source, | |
dedabea4 LP |
494 | t->wake_system ? CLOCK_BOOTTIME_ALARM : CLOCK_MONOTONIC, |
495 | t->next_elapse_monotonic_or_boottime, t->accuracy_usec, | |
6a0f1f6d | 496 | timer_dispatch, t); |
cbf60d0a LP |
497 | if (r < 0) |
498 | goto fail; | |
718db961 | 499 | |
cbf60d0a LP |
500 | (void) sd_event_source_set_description(t->monotonic_event_source, "timer-monotonic"); |
501 | } | |
7dfbe2e3 | 502 | |
718db961 | 503 | } else if (t->monotonic_event_source) { |
718db961 | 504 | |
06642d17 | 505 | r = sd_event_source_set_enabled(t->monotonic_event_source, SD_EVENT_OFF); |
718db961 LP |
506 | if (r < 0) |
507 | goto fail; | |
508 | } | |
36697dc0 LP |
509 | |
510 | if (found_realtime) { | |
511 | char buf[FORMAT_TIMESTAMP_MAX]; | |
744c7693 LP |
512 | |
513 | add_random(t, &t->next_elapse_realtime); | |
514 | ||
f2341e0a | 515 | log_unit_debug(UNIT(t), "Realtime timer elapses at %s.", format_timestamp(buf, sizeof(buf), t->next_elapse_realtime)); |
36697dc0 | 516 | |
718db961 LP |
517 | if (t->realtime_event_source) { |
518 | r = sd_event_source_set_time(t->realtime_event_source, t->next_elapse_realtime); | |
519 | if (r < 0) | |
520 | goto fail; | |
521 | ||
522 | r = sd_event_source_set_enabled(t->realtime_event_source, SD_EVENT_ONESHOT); | |
cbf60d0a LP |
523 | if (r < 0) |
524 | goto fail; | |
525 | } else { | |
6a0f1f6d LP |
526 | r = sd_event_add_time( |
527 | UNIT(t)->manager->event, | |
528 | &t->realtime_event_source, | |
dedabea4 | 529 | t->wake_system ? CLOCK_REALTIME_ALARM : CLOCK_REALTIME, |
6a0f1f6d LP |
530 | t->next_elapse_realtime, t->accuracy_usec, |
531 | timer_dispatch, t); | |
cbf60d0a LP |
532 | if (r < 0) |
533 | goto fail; | |
718db961 | 534 | |
cbf60d0a LP |
535 | (void) sd_event_source_set_description(t->realtime_event_source, "timer-realtime"); |
536 | } | |
7dfbe2e3 | 537 | |
718db961 | 538 | } else if (t->realtime_event_source) { |
718db961 | 539 | |
06642d17 | 540 | r = sd_event_source_set_enabled(t->realtime_event_source, SD_EVENT_OFF); |
718db961 LP |
541 | if (r < 0) |
542 | goto fail; | |
543 | } | |
871d7de4 LP |
544 | |
545 | timer_set_state(t, TIMER_WAITING); | |
546 | return; | |
547 | ||
548 | fail: | |
f2341e0a | 549 | log_unit_warning_errno(UNIT(t), r, "Failed to enter waiting state: %m"); |
067d72c9 | 550 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); |
871d7de4 LP |
551 | } |
552 | ||
553 | static void timer_enter_running(Timer *t) { | |
4afd3348 | 554 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
871d7de4 | 555 | int r; |
398ef8ba | 556 | |
871d7de4 LP |
557 | assert(t); |
558 | ||
ba3e67a7 | 559 | /* Don't start job if we are supposed to go down */ |
31afa0a4 | 560 | if (unit_stop_pending(UNIT(t))) |
ba3e67a7 LP |
561 | return; |
562 | ||
4bd29fe5 | 563 | r = manager_add_job(UNIT(t)->manager, JOB_START, UNIT_TRIGGER(UNIT(t)), JOB_REPLACE, &error, NULL); |
36697dc0 | 564 | if (r < 0) |
871d7de4 LP |
565 | goto fail; |
566 | ||
06642d17 LP |
567 | dual_timestamp_get(&t->last_trigger); |
568 | ||
472fc28f | 569 | if (t->stamp_path) |
ee735086 | 570 | touch_file(t->stamp_path, true, t->last_trigger.realtime, UID_INVALID, GID_INVALID, MODE_INVALID); |
e41e1943 | 571 | |
871d7de4 LP |
572 | timer_set_state(t, TIMER_RUNNING); |
573 | return; | |
574 | ||
575 | fail: | |
f2341e0a | 576 | log_unit_warning(UNIT(t), "Failed to queue unit startup job: %s", bus_error_message(&error, r)); |
067d72c9 | 577 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); |
871d7de4 LP |
578 | } |
579 | ||
580 | static int timer_start(Unit *u) { | |
581 | Timer *t = TIMER(u); | |
779042e7 | 582 | TimerValue *v; |
871d7de4 LP |
583 | |
584 | assert(t); | |
fdf20a31 | 585 | assert(t->state == TIMER_DEAD || t->state == TIMER_FAILED); |
01f78473 | 586 | |
3ecaa09b | 587 | if (UNIT_TRIGGER(u)->load_state != UNIT_LOADED) |
01f78473 | 588 | return -ENOENT; |
871d7de4 | 589 | |
06642d17 LP |
590 | t->last_trigger = DUAL_TIMESTAMP_NULL; |
591 | ||
779042e7 MC |
592 | /* Reenable all timers that depend on unit activation time */ |
593 | LIST_FOREACH(value, v, t->values) | |
594 | if (v->base == TIMER_ACTIVE) | |
595 | v->disabled = false; | |
596 | ||
06642d17 LP |
597 | if (t->stamp_path) { |
598 | struct stat st; | |
599 | ||
600 | if (stat(t->stamp_path, &st) >= 0) | |
601 | t->last_trigger.realtime = timespec_load(&st.st_atim); | |
472fc28f TB |
602 | else if (errno == ENOENT) |
603 | /* The timer has never run before, | |
604 | * make sure a stamp file exists. | |
605 | */ | |
ee735086 | 606 | touch_file(t->stamp_path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, MODE_INVALID); |
06642d17 LP |
607 | } |
608 | ||
067d72c9 | 609 | t->result = TIMER_SUCCESS; |
871d7de4 | 610 | timer_enter_waiting(t, true); |
82a2b6bb | 611 | return 1; |
871d7de4 LP |
612 | } |
613 | ||
614 | static int timer_stop(Unit *u) { | |
615 | Timer *t = TIMER(u); | |
616 | ||
617 | assert(t); | |
618 | assert(t->state == TIMER_WAITING || t->state == TIMER_RUNNING || t->state == TIMER_ELAPSED); | |
619 | ||
067d72c9 | 620 | timer_enter_dead(t, TIMER_SUCCESS); |
82a2b6bb | 621 | return 1; |
871d7de4 LP |
622 | } |
623 | ||
624 | static int timer_serialize(Unit *u, FILE *f, FDSet *fds) { | |
625 | Timer *t = TIMER(u); | |
626 | ||
627 | assert(u); | |
628 | assert(f); | |
629 | assert(fds); | |
630 | ||
631 | unit_serialize_item(u, f, "state", timer_state_to_string(t->state)); | |
067d72c9 | 632 | unit_serialize_item(u, f, "result", timer_result_to_string(t->result)); |
871d7de4 | 633 | |
06642d17 LP |
634 | if (t->last_trigger.realtime > 0) |
635 | unit_serialize_item_format(u, f, "last-trigger-realtime", "%" PRIu64, t->last_trigger.realtime); | |
636 | ||
637 | if (t->last_trigger.monotonic > 0) | |
638 | unit_serialize_item_format(u, f, "last-trigger-monotonic", "%" PRIu64, t->last_trigger.monotonic); | |
639 | ||
871d7de4 LP |
640 | return 0; |
641 | } | |
642 | ||
643 | static int timer_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
644 | Timer *t = TIMER(u); | |
06642d17 | 645 | int r; |
871d7de4 LP |
646 | |
647 | assert(u); | |
648 | assert(key); | |
649 | assert(value); | |
650 | assert(fds); | |
651 | ||
652 | if (streq(key, "state")) { | |
653 | TimerState state; | |
654 | ||
36697dc0 LP |
655 | state = timer_state_from_string(value); |
656 | if (state < 0) | |
f2341e0a | 657 | log_unit_debug(u, "Failed to parse state value: %s", value); |
871d7de4 LP |
658 | else |
659 | t->deserialized_state = state; | |
067d72c9 LP |
660 | } else if (streq(key, "result")) { |
661 | TimerResult f; | |
662 | ||
663 | f = timer_result_from_string(value); | |
664 | if (f < 0) | |
f2341e0a | 665 | log_unit_debug(u, "Failed to parse result value: %s", value); |
067d72c9 LP |
666 | else if (f != TIMER_SUCCESS) |
667 | t->result = f; | |
06642d17 LP |
668 | } else if (streq(key, "last-trigger-realtime")) { |
669 | ||
670 | r = safe_atou64(value, &t->last_trigger.realtime); | |
671 | if (r < 0) | |
f2341e0a | 672 | log_unit_debug(u, "Failed to parse last-trigger-realtime value: %s", value); |
06642d17 LP |
673 | |
674 | } else if (streq(key, "last-trigger-monotonic")) { | |
675 | ||
676 | r = safe_atou64(value, &t->last_trigger.monotonic); | |
677 | if (r < 0) | |
f2341e0a | 678 | log_unit_debug(u, "Failed to parse last-trigger-monotonic value: %s", value); |
067d72c9 | 679 | |
871d7de4 | 680 | } else |
f2341e0a | 681 | log_unit_debug(u, "Unknown serialization key: %s", key); |
871d7de4 LP |
682 | |
683 | return 0; | |
034c6ed7 LP |
684 | } |
685 | ||
44a6b1b6 | 686 | _pure_ static UnitActiveState timer_active_state(Unit *u) { |
871d7de4 LP |
687 | assert(u); |
688 | ||
689 | return state_translation_table[TIMER(u)->state]; | |
690 | } | |
691 | ||
44a6b1b6 | 692 | _pure_ static const char *timer_sub_state_to_string(Unit *u) { |
871d7de4 LP |
693 | assert(u); |
694 | ||
695 | return timer_state_to_string(TIMER(u)->state); | |
696 | } | |
697 | ||
718db961 LP |
698 | static int timer_dispatch(sd_event_source *s, uint64_t usec, void *userdata) { |
699 | Timer *t = TIMER(userdata); | |
871d7de4 LP |
700 | |
701 | assert(t); | |
5cb5a6ff | 702 | |
871d7de4 | 703 | if (t->state != TIMER_WAITING) |
718db961 | 704 | return 0; |
5cb5a6ff | 705 | |
f2341e0a | 706 | log_unit_debug(UNIT(t), "Timer elapsed."); |
871d7de4 | 707 | timer_enter_running(t); |
718db961 | 708 | return 0; |
5cb5a6ff LP |
709 | } |
710 | ||
3ecaa09b LP |
711 | static void timer_trigger_notify(Unit *u, Unit *other) { |
712 | Timer *t = TIMER(u); | |
713 | TimerValue *v; | |
871d7de4 | 714 | |
3ecaa09b LP |
715 | assert(u); |
716 | assert(other); | |
871d7de4 | 717 | |
3ecaa09b LP |
718 | if (other->load_state != UNIT_LOADED) |
719 | return; | |
871d7de4 | 720 | |
3ecaa09b LP |
721 | /* Reenable all timers that depend on unit state */ |
722 | LIST_FOREACH(value, v, t->values) | |
723 | if (v->base == TIMER_UNIT_ACTIVE || | |
724 | v->base == TIMER_UNIT_INACTIVE) | |
725 | v->disabled = false; | |
01f78473 | 726 | |
3ecaa09b | 727 | switch (t->state) { |
871d7de4 | 728 | |
3ecaa09b LP |
729 | case TIMER_WAITING: |
730 | case TIMER_ELAPSED: | |
871d7de4 | 731 | |
3ecaa09b LP |
732 | /* Recalculate sleep time */ |
733 | timer_enter_waiting(t, false); | |
734 | break; | |
871d7de4 | 735 | |
3ecaa09b | 736 | case TIMER_RUNNING: |
871d7de4 | 737 | |
3ecaa09b | 738 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { |
f2341e0a | 739 | log_unit_debug(UNIT(t), "Got notified about unit deactivation."); |
871d7de4 | 740 | timer_enter_waiting(t, false); |
3ecaa09b LP |
741 | } |
742 | break; | |
871d7de4 | 743 | |
3ecaa09b LP |
744 | case TIMER_DEAD: |
745 | case TIMER_FAILED: | |
746 | break; | |
871d7de4 | 747 | |
3ecaa09b LP |
748 | default: |
749 | assert_not_reached("Unknown timer state"); | |
871d7de4 | 750 | } |
871d7de4 LP |
751 | } |
752 | ||
fdf20a31 | 753 | static void timer_reset_failed(Unit *u) { |
5632e374 LP |
754 | Timer *t = TIMER(u); |
755 | ||
756 | assert(t); | |
757 | ||
fdf20a31 | 758 | if (t->state == TIMER_FAILED) |
5632e374 LP |
759 | timer_set_state(t, TIMER_DEAD); |
760 | ||
067d72c9 | 761 | t->result = TIMER_SUCCESS; |
5632e374 LP |
762 | } |
763 | ||
8742514c LP |
764 | static void timer_time_change(Unit *u) { |
765 | Timer *t = TIMER(u); | |
766 | ||
767 | assert(u); | |
768 | ||
769 | if (t->state != TIMER_WAITING) | |
770 | return; | |
771 | ||
f2341e0a | 772 | log_unit_debug(u, "Time change, recalculating next elapse."); |
8742514c LP |
773 | timer_enter_waiting(t, false); |
774 | } | |
775 | ||
871d7de4 | 776 | static const char* const timer_base_table[_TIMER_BASE_MAX] = { |
03fae018 LP |
777 | [TIMER_ACTIVE] = "OnActiveSec", |
778 | [TIMER_BOOT] = "OnBootSec", | |
779 | [TIMER_STARTUP] = "OnStartupSec", | |
780 | [TIMER_UNIT_ACTIVE] = "OnUnitActiveSec", | |
36697dc0 LP |
781 | [TIMER_UNIT_INACTIVE] = "OnUnitInactiveSec", |
782 | [TIMER_CALENDAR] = "OnCalendar" | |
871d7de4 LP |
783 | }; |
784 | ||
785 | DEFINE_STRING_TABLE_LOOKUP(timer_base, TimerBase); | |
786 | ||
067d72c9 LP |
787 | static const char* const timer_result_table[_TIMER_RESULT_MAX] = { |
788 | [TIMER_SUCCESS] = "success", | |
789 | [TIMER_FAILURE_RESOURCES] = "resources" | |
790 | }; | |
791 | ||
792 | DEFINE_STRING_TABLE_LOOKUP(timer_result, TimerResult); | |
793 | ||
87f0e418 | 794 | const UnitVTable timer_vtable = { |
7d17cfbc | 795 | .object_size = sizeof(Timer), |
718db961 | 796 | |
f975e971 LP |
797 | .sections = |
798 | "Unit\0" | |
799 | "Timer\0" | |
800 | "Install\0", | |
d8a812d1 | 801 | .private_section = "Timer", |
5cb5a6ff | 802 | |
871d7de4 | 803 | .init = timer_init, |
034c6ed7 | 804 | .done = timer_done, |
871d7de4 LP |
805 | .load = timer_load, |
806 | ||
807 | .coldplug = timer_coldplug, | |
808 | ||
809 | .dump = timer_dump, | |
810 | ||
811 | .start = timer_start, | |
812 | .stop = timer_stop, | |
813 | ||
814 | .serialize = timer_serialize, | |
815 | .deserialize_item = timer_deserialize_item, | |
816 | ||
817 | .active_state = timer_active_state, | |
818 | .sub_state_to_string = timer_sub_state_to_string, | |
819 | ||
3ecaa09b LP |
820 | .trigger_notify = timer_trigger_notify, |
821 | ||
fdf20a31 | 822 | .reset_failed = timer_reset_failed, |
8742514c | 823 | .time_change = timer_time_change, |
5632e374 | 824 | |
718db961 | 825 | .bus_vtable = bus_timer_vtable, |
d8a812d1 WC |
826 | .bus_set_property = bus_timer_set_property, |
827 | ||
828 | .can_transient = true, | |
5cb5a6ff | 829 | }; |