1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include "unit-name.h"
27 #include "dbus-timer.h"
29 #include "bus-errors.h"
31 static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = {
32 [TIMER_DEAD] = UNIT_INACTIVE,
33 [TIMER_WAITING] = UNIT_ACTIVE,
34 [TIMER_RUNNING] = UNIT_ACTIVE,
35 [TIMER_ELAPSED] = UNIT_ACTIVE,
36 [TIMER_FAILED] = UNIT_FAILED
39 static void timer_init(Unit *u) {
43 assert(u->meta.load_state == UNIT_STUB);
45 t->next_elapse = (usec_t) -1;
48 static void timer_done(Unit *u) {
54 while ((v = t->values)) {
55 LIST_REMOVE(TimerValue, value, t->values, v);
59 unit_unwatch_timer(u, &t->timer_watch);
61 unit_ref_unset(&t->unit);
64 static int timer_verify(Timer *t) {
67 if (t->meta.load_state != UNIT_LOADED)
71 log_error("%s lacks value setting. Refusing.", t->meta.id);
78 static int timer_add_default_dependencies(Timer *t) {
83 if (t->meta.manager->running_as == MANAGER_SYSTEM) {
84 if ((r = unit_add_dependency_by_name(UNIT(t), UNIT_BEFORE, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
87 if ((r = unit_add_two_dependencies_by_name(UNIT(t), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
91 return unit_add_two_dependencies_by_name(UNIT(t), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
94 static int timer_load(Unit *u) {
99 assert(u->meta.load_state == UNIT_STUB);
101 if ((r = unit_load_fragment_and_dropin(u)) < 0)
104 if (u->meta.load_state == UNIT_LOADED) {
106 if (!UNIT_DEREF(t->unit)) {
109 r = unit_load_related_unit(u, ".service", &x);
113 unit_ref_set(&t->unit, x);
116 r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(t->unit), true);
120 if (t->meta.default_dependencies)
121 if ((r = timer_add_default_dependencies(t)) < 0)
125 return timer_verify(t);
128 static void timer_dump(Unit *u, FILE *f, const char *prefix) {
132 timespan1[FORMAT_TIMESPAN_MAX];
135 "%sTimer State: %s\n"
137 prefix, timer_state_to_string(t->state),
138 prefix, UNIT_DEREF(t->unit)->meta.id);
140 LIST_FOREACH(value, v, t->values)
144 timer_base_to_string(v->base),
145 strna(format_timespan(timespan1, sizeof(timespan1), v->value)));
148 static void timer_set_state(Timer *t, TimerState state) {
149 TimerState old_state;
152 old_state = t->state;
155 if (state != TIMER_WAITING)
156 unit_unwatch_timer(UNIT(t), &t->timer_watch);
158 if (state != old_state)
159 log_debug("%s changed %s -> %s",
161 timer_state_to_string(old_state),
162 timer_state_to_string(state));
164 unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true);
167 static void timer_enter_waiting(Timer *t, bool initial);
169 static int timer_coldplug(Unit *u) {
173 assert(t->state == TIMER_DEAD);
175 if (t->deserialized_state != t->state) {
177 if (t->deserialized_state == TIMER_WAITING)
178 timer_enter_waiting(t, false);
180 timer_set_state(t, t->deserialized_state);
186 static void timer_enter_dead(Timer *t, bool success) {
192 timer_set_state(t, t->failure ? TIMER_FAILED : TIMER_DEAD);
195 static void timer_enter_waiting(Timer *t, bool initial) {
197 usec_t base = 0, delay, n;
201 n = now(CLOCK_MONOTONIC);
203 LIST_FOREACH(value, v, t->values) {
211 if (state_translation_table[t->state] == UNIT_ACTIVE)
212 base = t->meta.inactive_exit_timestamp.monotonic;
218 /* CLOCK_MONOTONIC equals the uptime on Linux */
223 base = t->meta.manager->startup_timestamp.monotonic;
226 case TIMER_UNIT_ACTIVE:
228 if (UNIT_DEREF(t->unit)->meta.inactive_exit_timestamp.monotonic <= 0)
231 base = UNIT_DEREF(t->unit)->meta.inactive_exit_timestamp.monotonic;
234 case TIMER_UNIT_INACTIVE:
236 if (UNIT_DEREF(t->unit)->meta.inactive_enter_timestamp.monotonic <= 0)
239 base = UNIT_DEREF(t->unit)->meta.inactive_enter_timestamp.monotonic;
243 assert_not_reached("Unknown timer base");
246 v->next_elapse = base + v->value;
248 if (!initial && v->next_elapse < n) {
254 t->next_elapse = v->next_elapse;
256 t->next_elapse = MIN(t->next_elapse, v->next_elapse);
262 timer_set_state(t, TIMER_ELAPSED);
266 delay = n < t->next_elapse ? t->next_elapse - n : 0;
268 if ((r = unit_watch_timer(UNIT(t), delay, &t->timer_watch)) < 0)
271 timer_set_state(t, TIMER_WAITING);
275 log_warning("%s failed to enter waiting state: %s", t->meta.id, strerror(-r));
276 timer_enter_dead(t, false);
279 static void timer_enter_running(Timer *t) {
284 dbus_error_init(&error);
286 /* Don't start job if we are supposed to go down */
287 if (t->meta.job && t->meta.job->type == JOB_STOP)
290 if ((r = manager_add_job(t->meta.manager, JOB_START, UNIT_DEREF(t->unit), JOB_REPLACE, true, &error, NULL)) < 0)
293 timer_set_state(t, TIMER_RUNNING);
297 log_warning("%s failed to queue unit startup job: %s", t->meta.id, bus_error(&error, r));
298 timer_enter_dead(t, false);
300 dbus_error_free(&error);
303 static int timer_start(Unit *u) {
307 assert(t->state == TIMER_DEAD || t->state == TIMER_FAILED);
309 if (UNIT_DEREF(t->unit)->meta.load_state != UNIT_LOADED)
313 timer_enter_waiting(t, true);
317 static int timer_stop(Unit *u) {
321 assert(t->state == TIMER_WAITING || t->state == TIMER_RUNNING || t->state == TIMER_ELAPSED);
323 timer_enter_dead(t, true);
327 static int timer_serialize(Unit *u, FILE *f, FDSet *fds) {
334 unit_serialize_item(u, f, "state", timer_state_to_string(t->state));
339 static int timer_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
347 if (streq(key, "state")) {
350 if ((state = timer_state_from_string(value)) < 0)
351 log_debug("Failed to parse state value %s", value);
353 t->deserialized_state = state;
355 log_debug("Unknown serialization key '%s'", key);
360 static UnitActiveState timer_active_state(Unit *u) {
363 return state_translation_table[TIMER(u)->state];
366 static const char *timer_sub_state_to_string(Unit *u) {
369 return timer_state_to_string(TIMER(u)->state);
372 static void timer_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
376 assert(elapsed == 1);
378 if (t->state != TIMER_WAITING)
381 log_debug("Timer elapsed on %s", u->meta.id);
382 timer_enter_running(t);
385 void timer_unit_notify(Unit *u, UnitActiveState new_state) {
389 if (u->meta.type == UNIT_TIMER)
392 SET_FOREACH(k, u->meta.dependencies[UNIT_TRIGGERED_BY], i) {
396 if (k->meta.type != UNIT_TIMER)
399 if (k->meta.load_state != UNIT_LOADED)
404 /* Reenable all timers that depend on unit state */
405 LIST_FOREACH(value, v, t->values)
406 if (v->base == TIMER_UNIT_ACTIVE ||
407 v->base == TIMER_UNIT_INACTIVE)
415 /* Recalculate sleep time */
416 timer_enter_waiting(t, false);
421 if (UNIT_IS_INACTIVE_OR_FAILED(new_state)) {
422 log_debug("%s got notified about unit deactivation.", t->meta.id);
423 timer_enter_waiting(t, false);
433 assert_not_reached("Unknown timer state");
438 static void timer_reset_failed(Unit *u) {
443 if (t->state == TIMER_FAILED)
444 timer_set_state(t, TIMER_DEAD);
449 static const char* const timer_state_table[_TIMER_STATE_MAX] = {
450 [TIMER_DEAD] = "dead",
451 [TIMER_WAITING] = "waiting",
452 [TIMER_RUNNING] = "running",
453 [TIMER_ELAPSED] = "elapsed",
454 [TIMER_FAILED] = "failed"
457 DEFINE_STRING_TABLE_LOOKUP(timer_state, TimerState);
459 static const char* const timer_base_table[_TIMER_BASE_MAX] = {
460 [TIMER_ACTIVE] = "OnActiveSec",
461 [TIMER_BOOT] = "OnBootSec",
462 [TIMER_STARTUP] = "OnStartupSec",
463 [TIMER_UNIT_ACTIVE] = "OnUnitActiveSec",
464 [TIMER_UNIT_INACTIVE] = "OnUnitInactiveSec"
467 DEFINE_STRING_TABLE_LOOKUP(timer_base, TimerBase);
469 const UnitVTable timer_vtable = {
480 .coldplug = timer_coldplug,
484 .start = timer_start,
487 .serialize = timer_serialize,
488 .deserialize_item = timer_deserialize_item,
490 .active_state = timer_active_state,
491 .sub_state_to_string = timer_sub_state_to_string,
493 .timer_event = timer_timer_event,
495 .reset_failed = timer_reset_failed,
497 .bus_interface = "org.freedesktop.systemd1.Timer",
498 .bus_message_handler = bus_timer_message_handler,
499 .bus_invalidating_properties = bus_timer_invalidating_properties