]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 | 2 | |
ca78ad1d ZJS |
3 | #include <sys/stat.h> |
4 | #include <sys/types.h> | |
5 | #include <unistd.h> | |
6 | ||
d46de8a1 LP |
7 | #include <errno.h> |
8 | ||
b5efdb8a | 9 | #include "alloc-util.h" |
07630cea LP |
10 | #include "bus-error.h" |
11 | #include "bus-util.h" | |
871d7de4 | 12 | #include "dbus-timer.h" |
6fcbec6f | 13 | #include "dbus-unit.h" |
f4f15635 | 14 | #include "fs-util.h" |
6bedfcbb | 15 | #include "parse-util.h" |
744c7693 | 16 | #include "random-util.h" |
d68c645b | 17 | #include "serialize.h" |
a40eb732 | 18 | #include "special.h" |
8b43440b | 19 | #include "string-table.h" |
07630cea | 20 | #include "string-util.h" |
b1d4f8e1 | 21 | #include "timer.h" |
07630cea LP |
22 | #include "unit-name.h" |
23 | #include "unit.h" | |
b1d4f8e1 | 24 | #include "user-util.h" |
c1d9ba99 | 25 | #include "virt.h" |
871d7de4 LP |
26 | |
27 | static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = { | |
28 | [TIMER_DEAD] = UNIT_INACTIVE, | |
29 | [TIMER_WAITING] = UNIT_ACTIVE, | |
30 | [TIMER_RUNNING] = UNIT_ACTIVE, | |
31 | [TIMER_ELAPSED] = UNIT_ACTIVE, | |
fdf20a31 | 32 | [TIMER_FAILED] = UNIT_FAILED |
871d7de4 LP |
33 | }; |
34 | ||
718db961 LP |
35 | static int timer_dispatch(sd_event_source *s, uint64_t usec, void *userdata); |
36 | ||
871d7de4 LP |
37 | static void timer_init(Unit *u) { |
38 | Timer *t = TIMER(u); | |
39 | ||
40 | assert(u); | |
ac155bb8 | 41 | assert(u->load_state == UNIT_STUB); |
871d7de4 | 42 | |
3a43da28 KS |
43 | t->next_elapse_monotonic_or_boottime = USEC_INFINITY; |
44 | t->next_elapse_realtime = USEC_INFINITY; | |
bd8f585b | 45 | t->accuracy_usec = u->manager->default_timer_accuracy_usec; |
3e0c30ac | 46 | t->remain_after_elapse = true; |
871d7de4 | 47 | } |
5cb5a6ff | 48 | |
74051b9b | 49 | void timer_free_values(Timer *t) { |
871d7de4 LP |
50 | TimerValue *v; |
51 | ||
52 | assert(t); | |
53 | ||
54 | while ((v = t->values)) { | |
71fda00f | 55 | LIST_REMOVE(value, t->values, v); |
3e044c49 | 56 | calendar_spec_free(v->calendar_spec); |
871d7de4 LP |
57 | free(v); |
58 | } | |
74051b9b LP |
59 | } |
60 | ||
61 | static void timer_done(Unit *u) { | |
62 | Timer *t = TIMER(u); | |
63 | ||
64 | assert(t); | |
65 | ||
66 | timer_free_values(t); | |
871d7de4 | 67 | |
718db961 LP |
68 | t->monotonic_event_source = sd_event_source_unref(t->monotonic_event_source); |
69 | t->realtime_event_source = sd_event_source_unref(t->realtime_event_source); | |
06642d17 LP |
70 | |
71 | free(t->stamp_path); | |
871d7de4 LP |
72 | } |
73 | ||
74 | static int timer_verify(Timer *t) { | |
75 | assert(t); | |
76 | ||
1124fe6f | 77 | if (UNIT(t)->load_state != UNIT_LOADED) |
871d7de4 LP |
78 | return 0; |
79 | ||
80 | if (!t->values) { | |
f2341e0a | 81 | log_unit_error(UNIT(t), "Timer unit lacks value setting. Refusing."); |
6f40aa45 | 82 | return -ENOEXEC; |
871d7de4 LP |
83 | } |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
6c155fe3 LP |
88 | static int timer_add_default_dependencies(Timer *t) { |
89 | int r; | |
19f8d037 | 90 | TimerValue *v; |
6c155fe3 LP |
91 | |
92 | assert(t); | |
93 | ||
4c9ea260 LP |
94 | if (!UNIT(t)->default_dependencies) |
95 | return 0; | |
96 | ||
35d8c19a | 97 | r = unit_add_dependency_by_name(UNIT(t), UNIT_BEFORE, SPECIAL_TIMERS_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
e3d84721 LP |
98 | if (r < 0) |
99 | return r; | |
2a77d31d | 100 | |
463d0d15 | 101 | if (MANAGER_IS_SYSTEM(UNIT(t)->manager)) { |
5a724170 | 102 | r = unit_add_two_dependencies_by_name(UNIT(t), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
36697dc0 | 103 | if (r < 0) |
6c155fe3 | 104 | return r; |
19f8d037 TGR |
105 | |
106 | LIST_FOREACH(value, v, t->values) { | |
107 | if (v->base == TIMER_CALENDAR) { | |
35d8c19a | 108 | r = unit_add_dependency_by_name(UNIT(t), UNIT_AFTER, SPECIAL_TIME_SYNC_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
19f8d037 TGR |
109 | if (r < 0) |
110 | return r; | |
111 | break; | |
112 | } | |
113 | } | |
2a77d31d | 114 | } |
6c155fe3 | 115 | |
5a724170 | 116 | return unit_add_two_dependencies_by_name(UNIT(t), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
eef85c4a LP |
117 | } |
118 | ||
119 | static int timer_add_trigger_dependencies(Timer *t) { | |
120 | Unit *x; | |
121 | int r; | |
122 | ||
123 | assert(t); | |
124 | ||
125 | if (!hashmap_isempty(UNIT(t)->dependencies[UNIT_TRIGGERS])) | |
126 | return 0; | |
127 | ||
128 | r = unit_load_related_unit(UNIT(t), ".service", &x); | |
129 | if (r < 0) | |
130 | return r; | |
131 | ||
132 | return unit_add_two_dependencies(UNIT(t), UNIT_BEFORE, UNIT_TRIGGERS, x, true, UNIT_DEPENDENCY_IMPLICIT); | |
6c155fe3 LP |
133 | } |
134 | ||
06642d17 LP |
135 | static int timer_setup_persistent(Timer *t) { |
136 | int r; | |
137 | ||
138 | assert(t); | |
139 | ||
140 | if (!t->persistent) | |
141 | return 0; | |
142 | ||
463d0d15 | 143 | if (MANAGER_IS_SYSTEM(UNIT(t)->manager)) { |
06642d17 | 144 | |
eef85c4a | 145 | r = unit_require_mounts_for(UNIT(t), "/var/lib/systemd/timers", UNIT_DEPENDENCY_FILE); |
06642d17 LP |
146 | if (r < 0) |
147 | return r; | |
148 | ||
149 | t->stamp_path = strappend("/var/lib/systemd/timers/stamp-", UNIT(t)->id); | |
150 | } else { | |
151 | const char *e; | |
152 | ||
153 | e = getenv("XDG_DATA_HOME"); | |
154 | if (e) | |
605405c6 | 155 | t->stamp_path = strjoin(e, "/systemd/timers/stamp-", UNIT(t)->id); |
06642d17 LP |
156 | else { |
157 | ||
158 | _cleanup_free_ char *h = NULL; | |
159 | ||
160 | r = get_home_dir(&h); | |
23bbb0de | 161 | if (r < 0) |
f2341e0a | 162 | return log_unit_error_errno(UNIT(t), r, "Failed to determine home directory: %m"); |
06642d17 | 163 | |
605405c6 | 164 | t->stamp_path = strjoin(h, "/.local/share/systemd/timers/stamp-", UNIT(t)->id); |
06642d17 LP |
165 | } |
166 | } | |
167 | ||
168 | if (!t->stamp_path) | |
169 | return log_oom(); | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
871d7de4 LP |
174 | static int timer_load(Unit *u) { |
175 | Timer *t = TIMER(u); | |
176 | int r; | |
177 | ||
178 | assert(u); | |
ac155bb8 | 179 | assert(u->load_state == UNIT_STUB); |
871d7de4 | 180 | |
36697dc0 LP |
181 | r = unit_load_fragment_and_dropin(u); |
182 | if (r < 0) | |
871d7de4 LP |
183 | return r; |
184 | ||
ac155bb8 | 185 | if (u->load_state == UNIT_LOADED) { |
871d7de4 | 186 | |
eef85c4a LP |
187 | r = timer_add_trigger_dependencies(t); |
188 | if (r < 0) | |
189 | return r; | |
57020a3a | 190 | |
06642d17 LP |
191 | r = timer_setup_persistent(t); |
192 | if (r < 0) | |
193 | return r; | |
194 | ||
4c9ea260 LP |
195 | r = timer_add_default_dependencies(t); |
196 | if (r < 0) | |
197 | return r; | |
871d7de4 LP |
198 | } |
199 | ||
200 | return timer_verify(t); | |
201 | } | |
202 | ||
203 | static void timer_dump(Unit *u, FILE *f, const char *prefix) { | |
9f5eb56a | 204 | char buf[FORMAT_TIMESPAN_MAX]; |
871d7de4 | 205 | Timer *t = TIMER(u); |
3ecaa09b | 206 | Unit *trigger; |
871d7de4 | 207 | TimerValue *v; |
034c6ed7 | 208 | |
3ecaa09b LP |
209 | trigger = UNIT_TRIGGER(u); |
210 | ||
871d7de4 LP |
211 | fprintf(f, |
212 | "%sTimer State: %s\n" | |
067d72c9 | 213 | "%sResult: %s\n" |
9f5eb56a | 214 | "%sUnit: %s\n" |
dedabea4 LP |
215 | "%sPersistent: %s\n" |
216 | "%sWakeSystem: %s\n" | |
3e0c30ac LP |
217 | "%sAccuracy: %s\n" |
218 | "%sRemainAfterElapse: %s\n", | |
871d7de4 | 219 | prefix, timer_state_to_string(t->state), |
067d72c9 | 220 | prefix, timer_result_to_string(t->result), |
9f5eb56a | 221 | prefix, trigger ? trigger->id : "n/a", |
dedabea4 LP |
222 | prefix, yes_no(t->persistent), |
223 | prefix, yes_no(t->wake_system), | |
3e0c30ac LP |
224 | prefix, format_timespan(buf, sizeof(buf), t->accuracy_usec, 1), |
225 | prefix, yes_no(t->remain_after_elapse)); | |
871d7de4 | 226 | |
36697dc0 LP |
227 | LIST_FOREACH(value, v, t->values) { |
228 | ||
229 | if (v->base == TIMER_CALENDAR) { | |
230 | _cleanup_free_ char *p = NULL; | |
231 | ||
25cb94d4 | 232 | (void) calendar_spec_to_string(v->calendar_spec, &p); |
36697dc0 LP |
233 | |
234 | fprintf(f, | |
235 | "%s%s: %s\n", | |
236 | prefix, | |
237 | timer_base_to_string(v->base), | |
238 | strna(p)); | |
239 | } else { | |
240 | char timespan1[FORMAT_TIMESPAN_MAX]; | |
241 | ||
242 | fprintf(f, | |
243 | "%s%s: %s\n", | |
244 | prefix, | |
245 | timer_base_to_string(v->base), | |
b1d6dcf5 | 246 | format_timespan(timespan1, sizeof(timespan1), v->value, 0)); |
36697dc0 LP |
247 | } |
248 | } | |
871d7de4 LP |
249 | } |
250 | ||
251 | static void timer_set_state(Timer *t, TimerState state) { | |
252 | TimerState old_state; | |
034c6ed7 | 253 | assert(t); |
871d7de4 | 254 | |
6fcbec6f LP |
255 | if (t->state != state) |
256 | bus_unit_send_pending_change_signal(UNIT(t), false); | |
257 | ||
871d7de4 LP |
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 | |
2ad2e41a | 271 | unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], 0); |
871d7de4 LP |
272 | } |
273 | ||
aa1f95d2 | 274 | static void timer_enter_waiting(Timer *t, bool time_change); |
871d7de4 | 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 | 285 | if (t->deserialized_state == TIMER_WAITING) |
aa1f95d2 | 286 | timer_enter_waiting(t, false); |
3e0c30ac LP |
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 | |
aac99f30 | 299 | unit_log_result(UNIT(t), t->result == TIMER_SUCCESS, timer_result_to_string(t->result)); |
067d72c9 | 300 | timer_set_state(t, t->result != TIMER_SUCCESS ? TIMER_FAILED : TIMER_DEAD); |
871d7de4 LP |
301 | } |
302 | ||
3e0c30ac LP |
303 | static void timer_enter_elapsed(Timer *t, bool leave_around) { |
304 | assert(t); | |
305 | ||
306 | /* If a unit is marked with RemainAfterElapse=yes we leave it | |
307 | * around even after it elapsed once, so that starting it | |
308 | * later again does not necessarily mean immediate | |
309 | * retriggering. We unconditionally leave units with | |
310 | * TIMER_UNIT_ACTIVE or TIMER_UNIT_INACTIVE triggers around, | |
311 | * since they might be restarted automatically at any time | |
312 | * later on. */ | |
313 | ||
314 | if (t->remain_after_elapse || leave_around) | |
315 | timer_set_state(t, TIMER_ELAPSED); | |
316 | else | |
317 | timer_enter_dead(t, TIMER_SUCCESS); | |
318 | } | |
319 | ||
744c7693 LP |
320 | static void add_random(Timer *t, usec_t *v) { |
321 | char s[FORMAT_TIMESPAN_MAX]; | |
322 | usec_t add; | |
323 | ||
324 | assert(t); | |
3f51aec8 | 325 | assert(v); |
744c7693 LP |
326 | |
327 | if (t->random_usec == 0) | |
328 | return; | |
329 | if (*v == USEC_INFINITY) | |
330 | return; | |
331 | ||
332 | add = random_u64() % t->random_usec; | |
333 | ||
334 | if (*v + add < *v) /* overflow */ | |
335 | *v = (usec_t) -2; /* Highest possible value, that is not USEC_INFINITY */ | |
336 | else | |
337 | *v += add; | |
338 | ||
382852fd | 339 | log_unit_debug(UNIT(t), "Adding %s random time.", format_timespan(s, sizeof(s), add, 0)); |
744c7693 LP |
340 | } |
341 | ||
aa1f95d2 | 342 | static void timer_enter_waiting(Timer *t, bool time_change) { |
36697dc0 | 343 | bool found_monotonic = false, found_realtime = false; |
3e0c30ac | 344 | bool leave_around = false; |
c54be90b | 345 | triple_timestamp ts; |
dedabea4 | 346 | TimerValue *v; |
e903182e | 347 | Unit *trigger; |
871d7de4 LP |
348 | int r; |
349 | ||
e903182e LP |
350 | assert(t); |
351 | ||
352 | trigger = UNIT_TRIGGER(UNIT(t)); | |
353 | if (!trigger) { | |
354 | log_unit_error(UNIT(t), "Unit to trigger vanished."); | |
355 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); | |
356 | return; | |
357 | } | |
358 | ||
c54be90b | 359 | triple_timestamp_get(&ts); |
dedabea4 | 360 | t->next_elapse_monotonic_or_boottime = t->next_elapse_realtime = 0; |
871d7de4 LP |
361 | |
362 | LIST_FOREACH(value, v, t->values) { | |
871d7de4 LP |
363 | if (v->disabled) |
364 | continue; | |
365 | ||
36697dc0 | 366 | if (v->base == TIMER_CALENDAR) { |
06642d17 LP |
367 | usec_t b; |
368 | ||
369 | /* If we know the last time this was | |
370 | * triggered, schedule the job based relative | |
9ea9faff AJ |
371 | * to that. If we don't, just start from |
372 | * the activation time. */ | |
373 | ||
374 | if (t->last_trigger.realtime > 0) | |
375 | b = t->last_trigger.realtime; | |
376 | else { | |
377 | if (state_translation_table[t->state] == UNIT_ACTIVE) | |
378 | b = UNIT(t)->inactive_exit_timestamp.realtime; | |
379 | else | |
380 | b = ts.realtime; | |
381 | } | |
06642d17 LP |
382 | |
383 | r = calendar_spec_next_usec(v->calendar_spec, b, &v->next_elapse); | |
36697dc0 LP |
384 | if (r < 0) |
385 | continue; | |
386 | ||
a87c1d3a TY |
387 | /* To make the delay due to RandomizedDelaySec= work even at boot, |
388 | * if the scheduled time has already passed, set the time when systemd | |
389 | * first started as the scheduled time. | |
390 | * Also, we don't have to check t->persistent since the logic implicitly express true. */ | |
391 | if (v->next_elapse < UNIT(t)->manager->timestamps[MANAGER_TIMESTAMP_USERSPACE].realtime) | |
392 | v->next_elapse = UNIT(t)->manager->timestamps[MANAGER_TIMESTAMP_USERSPACE].realtime; | |
393 | ||
36697dc0 LP |
394 | if (!found_realtime) |
395 | t->next_elapse_realtime = v->next_elapse; | |
10717a1a | 396 | else |
36697dc0 | 397 | t->next_elapse_realtime = MIN(t->next_elapse_realtime, v->next_elapse); |
871d7de4 | 398 | |
36697dc0 | 399 | found_realtime = true; |
871d7de4 | 400 | |
60933bb8 AJ |
401 | } else { |
402 | usec_t base; | |
c54be90b | 403 | |
36697dc0 | 404 | switch (v->base) { |
871d7de4 | 405 | |
36697dc0 LP |
406 | case TIMER_ACTIVE: |
407 | if (state_translation_table[t->state] == UNIT_ACTIVE) | |
408 | base = UNIT(t)->inactive_exit_timestamp.monotonic; | |
409 | else | |
c54be90b | 410 | base = ts.monotonic; |
36697dc0 | 411 | break; |
871d7de4 | 412 | |
36697dc0 | 413 | case TIMER_BOOT: |
c1d9ba99 MS |
414 | if (detect_container() <= 0) { |
415 | /* CLOCK_MONOTONIC equals the uptime on Linux */ | |
416 | base = 0; | |
417 | break; | |
418 | } | |
419 | /* In a container we don't want to include the time the host | |
420 | * was already up when the container started, so count from | |
ec251fe7 | 421 | * our own startup. */ |
4831981d | 422 | _fallthrough_; |
36697dc0 | 423 | case TIMER_STARTUP: |
9f9f0342 | 424 | base = UNIT(t)->manager->timestamps[MANAGER_TIMESTAMP_USERSPACE].monotonic; |
36697dc0 | 425 | break; |
871d7de4 | 426 | |
36697dc0 | 427 | case TIMER_UNIT_ACTIVE: |
3e0c30ac | 428 | leave_around = true; |
e903182e | 429 | base = trigger->inactive_exit_timestamp.monotonic; |
e41e1943 LP |
430 | |
431 | if (base <= 0) | |
06642d17 | 432 | base = t->last_trigger.monotonic; |
e41e1943 LP |
433 | |
434 | if (base <= 0) | |
36697dc0 | 435 | continue; |
204d140c | 436 | base = MAX(base, t->last_trigger.monotonic); |
871d7de4 | 437 | |
36697dc0 | 438 | break; |
871d7de4 | 439 | |
36697dc0 | 440 | case TIMER_UNIT_INACTIVE: |
3e0c30ac | 441 | leave_around = true; |
e903182e | 442 | base = trigger->inactive_enter_timestamp.monotonic; |
e41e1943 LP |
443 | |
444 | if (base <= 0) | |
06642d17 | 445 | base = t->last_trigger.monotonic; |
e41e1943 LP |
446 | |
447 | if (base <= 0) | |
36697dc0 | 448 | continue; |
204d140c | 449 | base = MAX(base, t->last_trigger.monotonic); |
871d7de4 | 450 | |
36697dc0 | 451 | break; |
871d7de4 | 452 | |
36697dc0 LP |
453 | default: |
454 | assert_not_reached("Unknown timer base"); | |
455 | } | |
871d7de4 | 456 | |
c54be90b | 457 | v->next_elapse = usec_add(usec_shift_clock(base, CLOCK_MONOTONIC, TIMER_MONOTONIC_CLOCK(t)), v->value); |
36697dc0 | 458 | |
aa1f95d2 MK |
459 | if (dual_timestamp_is_set(&t->last_trigger) && |
460 | !time_change && | |
c54be90b LP |
461 | v->next_elapse < triple_timestamp_by_clock(&ts, TIMER_MONOTONIC_CLOCK(t)) && |
462 | IN_SET(v->base, TIMER_ACTIVE, TIMER_BOOT, TIMER_STARTUP)) { | |
e41e1943 | 463 | /* This is a one time trigger, disable it now */ |
36697dc0 LP |
464 | v->disabled = true; |
465 | continue; | |
466 | } | |
467 | ||
468 | if (!found_monotonic) | |
dedabea4 | 469 | t->next_elapse_monotonic_or_boottime = v->next_elapse; |
36697dc0 | 470 | else |
dedabea4 | 471 | t->next_elapse_monotonic_or_boottime = MIN(t->next_elapse_monotonic_or_boottime, v->next_elapse); |
36697dc0 LP |
472 | |
473 | found_monotonic = true; | |
474 | } | |
871d7de4 LP |
475 | } |
476 | ||
36697dc0 | 477 | if (!found_monotonic && !found_realtime) { |
f2341e0a | 478 | log_unit_debug(UNIT(t), "Timer is elapsed."); |
3e0c30ac | 479 | timer_enter_elapsed(t, leave_around); |
871d7de4 LP |
480 | return; |
481 | } | |
482 | ||
36697dc0 LP |
483 | if (found_monotonic) { |
484 | char buf[FORMAT_TIMESPAN_MAX]; | |
3e0c30ac | 485 | usec_t left; |
dedabea4 | 486 | |
744c7693 LP |
487 | add_random(t, &t->next_elapse_monotonic_or_boottime); |
488 | ||
c54be90b | 489 | left = usec_sub_unsigned(t->next_elapse_monotonic_or_boottime, triple_timestamp_by_clock(&ts, TIMER_MONOTONIC_CLOCK(t))); |
3e0c30ac | 490 | log_unit_debug(UNIT(t), "Monotonic timer elapses in %s.", format_timespan(buf, sizeof(buf), left, 0)); |
871d7de4 | 491 | |
718db961 | 492 | if (t->monotonic_event_source) { |
dedabea4 | 493 | r = sd_event_source_set_time(t->monotonic_event_source, t->next_elapse_monotonic_or_boottime); |
718db961 LP |
494 | if (r < 0) |
495 | goto fail; | |
496 | ||
497 | r = sd_event_source_set_enabled(t->monotonic_event_source, SD_EVENT_ONESHOT); | |
cbf60d0a LP |
498 | if (r < 0) |
499 | goto fail; | |
500 | } else { | |
501 | ||
6a0f1f6d LP |
502 | r = sd_event_add_time( |
503 | UNIT(t)->manager->event, | |
504 | &t->monotonic_event_source, | |
dedabea4 LP |
505 | t->wake_system ? CLOCK_BOOTTIME_ALARM : CLOCK_MONOTONIC, |
506 | t->next_elapse_monotonic_or_boottime, t->accuracy_usec, | |
6a0f1f6d | 507 | timer_dispatch, t); |
cbf60d0a LP |
508 | if (r < 0) |
509 | goto fail; | |
718db961 | 510 | |
cbf60d0a LP |
511 | (void) sd_event_source_set_description(t->monotonic_event_source, "timer-monotonic"); |
512 | } | |
7dfbe2e3 | 513 | |
718db961 | 514 | } else if (t->monotonic_event_source) { |
718db961 | 515 | |
06642d17 | 516 | r = sd_event_source_set_enabled(t->monotonic_event_source, SD_EVENT_OFF); |
718db961 LP |
517 | if (r < 0) |
518 | goto fail; | |
519 | } | |
36697dc0 LP |
520 | |
521 | if (found_realtime) { | |
522 | char buf[FORMAT_TIMESTAMP_MAX]; | |
744c7693 LP |
523 | |
524 | add_random(t, &t->next_elapse_realtime); | |
525 | ||
f2341e0a | 526 | log_unit_debug(UNIT(t), "Realtime timer elapses at %s.", format_timestamp(buf, sizeof(buf), t->next_elapse_realtime)); |
36697dc0 | 527 | |
718db961 LP |
528 | if (t->realtime_event_source) { |
529 | r = sd_event_source_set_time(t->realtime_event_source, t->next_elapse_realtime); | |
530 | if (r < 0) | |
531 | goto fail; | |
532 | ||
533 | r = sd_event_source_set_enabled(t->realtime_event_source, SD_EVENT_ONESHOT); | |
cbf60d0a LP |
534 | if (r < 0) |
535 | goto fail; | |
536 | } else { | |
6a0f1f6d LP |
537 | r = sd_event_add_time( |
538 | UNIT(t)->manager->event, | |
539 | &t->realtime_event_source, | |
dedabea4 | 540 | t->wake_system ? CLOCK_REALTIME_ALARM : CLOCK_REALTIME, |
6a0f1f6d LP |
541 | t->next_elapse_realtime, t->accuracy_usec, |
542 | timer_dispatch, t); | |
cbf60d0a LP |
543 | if (r < 0) |
544 | goto fail; | |
718db961 | 545 | |
cbf60d0a LP |
546 | (void) sd_event_source_set_description(t->realtime_event_source, "timer-realtime"); |
547 | } | |
7dfbe2e3 | 548 | |
718db961 | 549 | } else if (t->realtime_event_source) { |
718db961 | 550 | |
06642d17 | 551 | r = sd_event_source_set_enabled(t->realtime_event_source, SD_EVENT_OFF); |
718db961 LP |
552 | if (r < 0) |
553 | goto fail; | |
554 | } | |
871d7de4 LP |
555 | |
556 | timer_set_state(t, TIMER_WAITING); | |
557 | return; | |
558 | ||
559 | fail: | |
f2341e0a | 560 | log_unit_warning_errno(UNIT(t), r, "Failed to enter waiting state: %m"); |
067d72c9 | 561 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); |
871d7de4 LP |
562 | } |
563 | ||
564 | static void timer_enter_running(Timer *t) { | |
4afd3348 | 565 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
e903182e | 566 | Unit *trigger; |
871d7de4 | 567 | int r; |
398ef8ba | 568 | |
871d7de4 LP |
569 | assert(t); |
570 | ||
ba3e67a7 | 571 | /* Don't start job if we are supposed to go down */ |
31afa0a4 | 572 | if (unit_stop_pending(UNIT(t))) |
ba3e67a7 LP |
573 | return; |
574 | ||
e903182e LP |
575 | trigger = UNIT_TRIGGER(UNIT(t)); |
576 | if (!trigger) { | |
577 | log_unit_error(UNIT(t), "Unit to trigger vanished."); | |
578 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); | |
579 | return; | |
580 | } | |
581 | ||
582 | r = manager_add_job(UNIT(t)->manager, JOB_START, trigger, JOB_REPLACE, &error, NULL); | |
36697dc0 | 583 | if (r < 0) |
871d7de4 LP |
584 | goto fail; |
585 | ||
06642d17 LP |
586 | dual_timestamp_get(&t->last_trigger); |
587 | ||
472fc28f | 588 | if (t->stamp_path) |
ee735086 | 589 | touch_file(t->stamp_path, true, t->last_trigger.realtime, UID_INVALID, GID_INVALID, MODE_INVALID); |
e41e1943 | 590 | |
871d7de4 LP |
591 | timer_set_state(t, TIMER_RUNNING); |
592 | return; | |
593 | ||
594 | fail: | |
f2341e0a | 595 | log_unit_warning(UNIT(t), "Failed to queue unit startup job: %s", bus_error_message(&error, r)); |
067d72c9 | 596 | timer_enter_dead(t, TIMER_FAILURE_RESOURCES); |
871d7de4 LP |
597 | } |
598 | ||
599 | static int timer_start(Unit *u) { | |
600 | Timer *t = TIMER(u); | |
779042e7 | 601 | TimerValue *v; |
07299350 | 602 | int r; |
871d7de4 LP |
603 | |
604 | assert(t); | |
3742095b | 605 | assert(IN_SET(t->state, TIMER_DEAD, TIMER_FAILED)); |
01f78473 | 606 | |
a4191c9f LP |
607 | r = unit_test_trigger_loaded(u); |
608 | if (r < 0) | |
609 | return r; | |
871d7de4 | 610 | |
97a3f4ee | 611 | r = unit_test_start_limit(u); |
07299350 LP |
612 | if (r < 0) { |
613 | timer_enter_dead(t, TIMER_FAILURE_START_LIMIT_HIT); | |
614 | return r; | |
615 | } | |
616 | ||
4b58153d LP |
617 | r = unit_acquire_invocation_id(u); |
618 | if (r < 0) | |
619 | return r; | |
620 | ||
06642d17 LP |
621 | t->last_trigger = DUAL_TIMESTAMP_NULL; |
622 | ||
779042e7 MC |
623 | /* Reenable all timers that depend on unit activation time */ |
624 | LIST_FOREACH(value, v, t->values) | |
625 | if (v->base == TIMER_ACTIVE) | |
626 | v->disabled = false; | |
627 | ||
06642d17 LP |
628 | if (t->stamp_path) { |
629 | struct stat st; | |
630 | ||
77542a79 LP |
631 | if (stat(t->stamp_path, &st) >= 0) { |
632 | usec_t ft; | |
633 | ||
634 | /* Load the file timestamp, but only if it is actually in the past. If it is in the future, | |
635 | * something is wrong with the system clock. */ | |
636 | ||
637 | ft = timespec_load(&st.st_mtim); | |
638 | if (ft < now(CLOCK_REALTIME)) | |
639 | t->last_trigger.realtime = ft; | |
640 | else { | |
641 | char z[FORMAT_TIMESTAMP_MAX]; | |
642 | ||
643 | log_unit_warning(u, "Not using persistent file timestamp %s as it is in the future.", | |
644 | format_timestamp(z, sizeof(z), ft)); | |
645 | } | |
646 | ||
647 | } else if (errno == ENOENT) | |
472fc28f TB |
648 | /* The timer has never run before, |
649 | * make sure a stamp file exists. | |
650 | */ | |
4b58153d | 651 | (void) touch_file(t->stamp_path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, MODE_INVALID); |
06642d17 LP |
652 | } |
653 | ||
067d72c9 | 654 | t->result = TIMER_SUCCESS; |
aa1f95d2 | 655 | timer_enter_waiting(t, false); |
82a2b6bb | 656 | return 1; |
871d7de4 LP |
657 | } |
658 | ||
659 | static int timer_stop(Unit *u) { | |
660 | Timer *t = TIMER(u); | |
661 | ||
662 | assert(t); | |
3742095b | 663 | assert(IN_SET(t->state, TIMER_WAITING, TIMER_RUNNING, TIMER_ELAPSED)); |
871d7de4 | 664 | |
067d72c9 | 665 | timer_enter_dead(t, TIMER_SUCCESS); |
82a2b6bb | 666 | return 1; |
871d7de4 LP |
667 | } |
668 | ||
669 | static int timer_serialize(Unit *u, FILE *f, FDSet *fds) { | |
670 | Timer *t = TIMER(u); | |
671 | ||
672 | assert(u); | |
673 | assert(f); | |
674 | assert(fds); | |
675 | ||
d68c645b LP |
676 | (void) serialize_item(f, "state", timer_state_to_string(t->state)); |
677 | (void) serialize_item(f, "result", timer_result_to_string(t->result)); | |
871d7de4 | 678 | |
06642d17 | 679 | if (t->last_trigger.realtime > 0) |
d68c645b | 680 | (void) serialize_usec(f, "last-trigger-realtime", t->last_trigger.realtime); |
06642d17 LP |
681 | |
682 | if (t->last_trigger.monotonic > 0) | |
d68c645b | 683 | (void) serialize_usec(f, "last-trigger-monotonic", t->last_trigger.monotonic); |
06642d17 | 684 | |
871d7de4 LP |
685 | return 0; |
686 | } | |
687 | ||
688 | static int timer_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
689 | Timer *t = TIMER(u); | |
690 | ||
691 | assert(u); | |
692 | assert(key); | |
693 | assert(value); | |
694 | assert(fds); | |
695 | ||
696 | if (streq(key, "state")) { | |
697 | TimerState state; | |
698 | ||
36697dc0 LP |
699 | state = timer_state_from_string(value); |
700 | if (state < 0) | |
f2341e0a | 701 | log_unit_debug(u, "Failed to parse state value: %s", value); |
871d7de4 LP |
702 | else |
703 | t->deserialized_state = state; | |
d68c645b | 704 | |
067d72c9 LP |
705 | } else if (streq(key, "result")) { |
706 | TimerResult f; | |
707 | ||
708 | f = timer_result_from_string(value); | |
709 | if (f < 0) | |
f2341e0a | 710 | log_unit_debug(u, "Failed to parse result value: %s", value); |
067d72c9 LP |
711 | else if (f != TIMER_SUCCESS) |
712 | t->result = f; | |
06642d17 | 713 | |
d68c645b LP |
714 | } else if (streq(key, "last-trigger-realtime")) |
715 | (void) deserialize_usec(value, &t->last_trigger.realtime); | |
716 | else if (streq(key, "last-trigger-monotonic")) | |
717 | (void) deserialize_usec(value, &t->last_trigger.monotonic); | |
718 | else | |
f2341e0a | 719 | log_unit_debug(u, "Unknown serialization key: %s", key); |
871d7de4 LP |
720 | |
721 | return 0; | |
034c6ed7 LP |
722 | } |
723 | ||
44a6b1b6 | 724 | _pure_ static UnitActiveState timer_active_state(Unit *u) { |
871d7de4 LP |
725 | assert(u); |
726 | ||
727 | return state_translation_table[TIMER(u)->state]; | |
728 | } | |
729 | ||
44a6b1b6 | 730 | _pure_ static const char *timer_sub_state_to_string(Unit *u) { |
871d7de4 LP |
731 | assert(u); |
732 | ||
733 | return timer_state_to_string(TIMER(u)->state); | |
734 | } | |
735 | ||
718db961 LP |
736 | static int timer_dispatch(sd_event_source *s, uint64_t usec, void *userdata) { |
737 | Timer *t = TIMER(userdata); | |
871d7de4 LP |
738 | |
739 | assert(t); | |
5cb5a6ff | 740 | |
871d7de4 | 741 | if (t->state != TIMER_WAITING) |
718db961 | 742 | return 0; |
5cb5a6ff | 743 | |
f2341e0a | 744 | log_unit_debug(UNIT(t), "Timer elapsed."); |
871d7de4 | 745 | timer_enter_running(t); |
718db961 | 746 | return 0; |
5cb5a6ff LP |
747 | } |
748 | ||
3ecaa09b LP |
749 | static void timer_trigger_notify(Unit *u, Unit *other) { |
750 | Timer *t = TIMER(u); | |
751 | TimerValue *v; | |
871d7de4 | 752 | |
3ecaa09b LP |
753 | assert(u); |
754 | assert(other); | |
871d7de4 | 755 | |
3ecaa09b LP |
756 | if (other->load_state != UNIT_LOADED) |
757 | return; | |
871d7de4 | 758 | |
3ecaa09b LP |
759 | /* Reenable all timers that depend on unit state */ |
760 | LIST_FOREACH(value, v, t->values) | |
3742095b | 761 | if (IN_SET(v->base, TIMER_UNIT_ACTIVE, TIMER_UNIT_INACTIVE)) |
3ecaa09b | 762 | v->disabled = false; |
01f78473 | 763 | |
3ecaa09b | 764 | switch (t->state) { |
871d7de4 | 765 | |
3ecaa09b LP |
766 | case TIMER_WAITING: |
767 | case TIMER_ELAPSED: | |
871d7de4 | 768 | |
3ecaa09b | 769 | /* Recalculate sleep time */ |
aa1f95d2 | 770 | timer_enter_waiting(t, false); |
3ecaa09b | 771 | break; |
871d7de4 | 772 | |
3ecaa09b | 773 | case TIMER_RUNNING: |
871d7de4 | 774 | |
3ecaa09b | 775 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { |
f2341e0a | 776 | log_unit_debug(UNIT(t), "Got notified about unit deactivation."); |
aa1f95d2 | 777 | timer_enter_waiting(t, false); |
3ecaa09b LP |
778 | } |
779 | break; | |
871d7de4 | 780 | |
3ecaa09b LP |
781 | case TIMER_DEAD: |
782 | case TIMER_FAILED: | |
783 | break; | |
871d7de4 | 784 | |
3ecaa09b LP |
785 | default: |
786 | assert_not_reached("Unknown timer state"); | |
871d7de4 | 787 | } |
871d7de4 LP |
788 | } |
789 | ||
fdf20a31 | 790 | static void timer_reset_failed(Unit *u) { |
5632e374 LP |
791 | Timer *t = TIMER(u); |
792 | ||
793 | assert(t); | |
794 | ||
fdf20a31 | 795 | if (t->state == TIMER_FAILED) |
5632e374 LP |
796 | timer_set_state(t, TIMER_DEAD); |
797 | ||
067d72c9 | 798 | t->result = TIMER_SUCCESS; |
5632e374 LP |
799 | } |
800 | ||
8742514c LP |
801 | static void timer_time_change(Unit *u) { |
802 | Timer *t = TIMER(u); | |
13f512d3 | 803 | usec_t ts; |
8742514c LP |
804 | |
805 | assert(u); | |
806 | ||
807 | if (t->state != TIMER_WAITING) | |
808 | return; | |
809 | ||
13f512d3 AJ |
810 | /* If we appear to have triggered in the future, the system clock must |
811 | * have been set backwards. So let's rewind our own clock and allow | |
812 | * the future trigger(s) to happen again :). Exactly the same as when | |
813 | * you start a timer unit with Persistent=yes. */ | |
814 | ts = now(CLOCK_REALTIME); | |
815 | if (t->last_trigger.realtime > ts) | |
816 | t->last_trigger.realtime = ts; | |
817 | ||
f2341e0a | 818 | log_unit_debug(u, "Time change, recalculating next elapse."); |
aa1f95d2 | 819 | timer_enter_waiting(t, true); |
8742514c LP |
820 | } |
821 | ||
bbf5fd8e LP |
822 | static void timer_timezone_change(Unit *u) { |
823 | Timer *t = TIMER(u); | |
824 | ||
825 | assert(u); | |
826 | ||
827 | if (t->state != TIMER_WAITING) | |
828 | return; | |
829 | ||
830 | log_unit_debug(u, "Timezone change, recalculating next elapse."); | |
aa1f95d2 | 831 | timer_enter_waiting(t, false); |
bbf5fd8e LP |
832 | } |
833 | ||
871d7de4 | 834 | static const char* const timer_base_table[_TIMER_BASE_MAX] = { |
03fae018 LP |
835 | [TIMER_ACTIVE] = "OnActiveSec", |
836 | [TIMER_BOOT] = "OnBootSec", | |
837 | [TIMER_STARTUP] = "OnStartupSec", | |
838 | [TIMER_UNIT_ACTIVE] = "OnUnitActiveSec", | |
36697dc0 LP |
839 | [TIMER_UNIT_INACTIVE] = "OnUnitInactiveSec", |
840 | [TIMER_CALENDAR] = "OnCalendar" | |
871d7de4 LP |
841 | }; |
842 | ||
843 | DEFINE_STRING_TABLE_LOOKUP(timer_base, TimerBase); | |
844 | ||
067d72c9 LP |
845 | static const char* const timer_result_table[_TIMER_RESULT_MAX] = { |
846 | [TIMER_SUCCESS] = "success", | |
07299350 LP |
847 | [TIMER_FAILURE_RESOURCES] = "resources", |
848 | [TIMER_FAILURE_START_LIMIT_HIT] = "start-limit-hit", | |
067d72c9 LP |
849 | }; |
850 | ||
851 | DEFINE_STRING_TABLE_LOOKUP(timer_result, TimerResult); | |
852 | ||
87f0e418 | 853 | const UnitVTable timer_vtable = { |
7d17cfbc | 854 | .object_size = sizeof(Timer), |
718db961 | 855 | |
f975e971 LP |
856 | .sections = |
857 | "Unit\0" | |
858 | "Timer\0" | |
859 | "Install\0", | |
d8a812d1 | 860 | .private_section = "Timer", |
5cb5a6ff | 861 | |
871d7de4 | 862 | .init = timer_init, |
034c6ed7 | 863 | .done = timer_done, |
871d7de4 LP |
864 | .load = timer_load, |
865 | ||
866 | .coldplug = timer_coldplug, | |
867 | ||
868 | .dump = timer_dump, | |
869 | ||
870 | .start = timer_start, | |
871 | .stop = timer_stop, | |
872 | ||
873 | .serialize = timer_serialize, | |
874 | .deserialize_item = timer_deserialize_item, | |
875 | ||
876 | .active_state = timer_active_state, | |
877 | .sub_state_to_string = timer_sub_state_to_string, | |
878 | ||
3ecaa09b LP |
879 | .trigger_notify = timer_trigger_notify, |
880 | ||
fdf20a31 | 881 | .reset_failed = timer_reset_failed, |
8742514c | 882 | .time_change = timer_time_change, |
bbf5fd8e | 883 | .timezone_change = timer_timezone_change, |
5632e374 | 884 | |
718db961 | 885 | .bus_vtable = bus_timer_vtable, |
d8a812d1 WC |
886 | .bus_set_property = bus_timer_set_property, |
887 | ||
888 | .can_transient = true, | |
5cb5a6ff | 889 | }; |