[thirdparty/systemd.git] / src / timer.c

/*-*- Mode: C; c-basic-offset: 8 -*-*/

/***
  This file is part of systemd.

  Copyright 2010 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <errno.h>

#include "unit.h"
#include "unit-name.h"
#include "timer.h"
#include "dbus-timer.h"
#include "special.h"

static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = {
        [TIMER_DEAD] = UNIT_INACTIVE,
        [TIMER_WAITING] = UNIT_ACTIVE,
        [TIMER_RUNNING] = UNIT_ACTIVE,
        [TIMER_ELAPSED] = UNIT_ACTIVE,
        [TIMER_MAINTENANCE] = UNIT_MAINTENANCE
};

static void timer_init(Unit *u) {
        Timer *t = TIMER(u);

        assert(u);
        assert(u->meta.load_state == UNIT_STUB);

        t->next_elapse = (usec_t) -1;
}

static void timer_done(Unit *u) {
        Timer *t = TIMER(u);
        TimerValue *v;

        assert(t);

        while ((v = t->values)) {
                LIST_REMOVE(TimerValue, value, t->values, v);
                free(v);
        }

        unit_unwatch_timer(u, &t->timer_watch);
}

static int timer_verify(Timer *t) {
        assert(t);

        if (t->meta.load_state != UNIT_LOADED)
                return 0;

        if (!t->values) {
                log_error("%s lacks value setting. Refusing.", t->meta.id);
                return -EINVAL;
        }

        return 0;
}

static int timer_load(Unit *u) {
        Timer *t = TIMER(u);
        int r;

        assert(u);
        assert(u->meta.load_state == UNIT_STUB);

        if ((r = unit_load_fragment_and_dropin(u)) < 0)
                return r;

        if (u->meta.load_state == UNIT_LOADED) {

                if (!t->unit)
                        if ((r = unit_load_related_unit(u, ".service", &t->unit)))
                                return r;

                if ((r = unit_add_dependency(u, UNIT_BEFORE, t->unit, true)) < 0)
                        return r;

                /* Timers shouldn't stay around on shutdown */
                if (t->meta.default_dependencies)
                        if ((r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
                                return r;
        }

        return timer_verify(t);
}

static void timer_dump(Unit *u, FILE *f, const char *prefix) {
        Timer *t = TIMER(u);
        const char *prefix2;
        char *p2;
        TimerValue *v;
        char
                timespan1[FORMAT_TIMESPAN_MAX];

        p2 = strappend(prefix, "\t");
        prefix2 = p2 ? p2 : prefix;

        fprintf(f,
                "%sTimer State: %s\n"
                "%sUnit: %s\n",
                prefix, timer_state_to_string(t->state),
                prefix, t->unit->meta.id);

        LIST_FOREACH(value, v, t->values)
                fprintf(f,
                        "%s%s: %s\n",
                        prefix,
                        timer_base_to_string(v->base),
                        strna(format_timespan(timespan1, sizeof(timespan1), v->value)));

        free(p2);
}

static void timer_set_state(Timer *t, TimerState state) {
        TimerState old_state;
        assert(t);

        old_state = t->state;
        t->state = state;

        if (state != TIMER_WAITING)
                unit_unwatch_timer(UNIT(t), &t->timer_watch);

        if (state != old_state)
                log_debug("%s changed %s -> %s",
                          t->meta.id,
                          timer_state_to_string(old_state),
                          timer_state_to_string(state));

        unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state]);
}

static void timer_enter_waiting(Timer *t, bool initial);

static int timer_coldplug(Unit *u) {
        Timer *t = TIMER(u);

        assert(t);
        assert(t->state == TIMER_DEAD);

        if (t->deserialized_state != t->state) {

                if (t->deserialized_state == TIMER_WAITING ||
                    t->deserialized_state == TIMER_RUNNING ||
                    t->deserialized_state == TIMER_ELAPSED)
                        timer_enter_waiting(t, false);
                else
                        timer_set_state(t, t->deserialized_state);
        }

        return 0;
}

static void timer_enter_dead(Timer *t, bool success) {
        assert(t);

        if (!success)
                t->failure = true;

        timer_set_state(t, t->failure ? TIMER_MAINTENANCE : TIMER_DEAD);
}

static void timer_enter_waiting(Timer *t, bool initial) {
        TimerValue *v;
        usec_t base = 0, delay, n;
        bool found = false;
        int r;

        n = now(CLOCK_MONOTONIC);

        LIST_FOREACH(value, v, t->values) {

                if (v->disabled)
                        continue;

                switch (v->base) {

                case TIMER_ACTIVE:
                        if (state_translation_table[t->state] == UNIT_ACTIVE) {
                                base = t->meta.inactive_exit_timestamp.monotonic;
                        } else
                                base = n;
                        break;

                case TIMER_BOOT:
                        /* CLOCK_MONOTONIC equals the uptime on Linux */
                        base = 0;
                        break;

                case TIMER_STARTUP:
                        base = t->meta.manager->startup_timestamp.monotonic;
                        break;

                case TIMER_UNIT_ACTIVE:

                        if (t->unit->meta.inactive_exit_timestamp.monotonic <= 0)
                                continue;

                        base = t->unit->meta.inactive_exit_timestamp.monotonic;
                        break;

                case TIMER_UNIT_INACTIVE:

                        if (t->unit->meta.inactive_enter_timestamp.monotonic <= 0)
                                continue;

                        base = t->unit->meta.inactive_enter_timestamp.monotonic;
                        break;

                default:
                        assert_not_reached("Unknown timer base");
                }

                v->next_elapse = base + v->value;

                if (!initial && v->next_elapse < n) {
                        v->disabled = true;
                        continue;
                }

                if (!found)
                        t->next_elapse = v->next_elapse;
                else
                        t->next_elapse = MIN(t->next_elapse, v->next_elapse);

                found = true;
        }

        if (!found) {
                timer_set_state(t, TIMER_ELAPSED);
                return;
        }

        delay = n < t->next_elapse ? t->next_elapse - n : 0;

        if ((r = unit_watch_timer(UNIT(t), delay, &t->timer_watch)) < 0)
                goto fail;

        timer_set_state(t, TIMER_WAITING);
        return;

fail:
        log_warning("%s failed to enter waiting state: %s", t->meta.id, strerror(-r));
        timer_enter_dead(t, false);
}

static void timer_enter_running(Timer *t) {
        int r;
        assert(t);

        if ((r = manager_add_job(t->meta.manager, JOB_START, t->unit, JOB_REPLACE, true, NULL)) < 0)
                goto fail;

        timer_set_state(t, TIMER_RUNNING);
        return;

fail:
        log_warning("%s failed to queue unit startup job: %s", t->meta.id, strerror(-r));
        timer_enter_dead(t, false);
}

static int timer_start(Unit *u) {
        Timer *t = TIMER(u);

        assert(t);
        assert(t->state == TIMER_DEAD || t->state == TIMER_MAINTENANCE);

        if (t->unit->meta.load_state != UNIT_LOADED)
                return -ENOENT;

        t->failure = false;
        timer_enter_waiting(t, true);
        return 0;
}

static int timer_stop(Unit *u) {
        Timer *t = TIMER(u);

        assert(t);
        assert(t->state == TIMER_WAITING || t->state == TIMER_RUNNING || t->state == TIMER_ELAPSED);

        timer_enter_dead(t, true);
        return 0;
}

static int timer_serialize(Unit *u, FILE *f, FDSet *fds) {
        Timer *t = TIMER(u);

        assert(u);
        assert(f);
        assert(fds);

        unit_serialize_item(u, f, "state", timer_state_to_string(t->state));

        return 0;
}

static int timer_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
        Timer *t = TIMER(u);

        assert(u);
        assert(key);
        assert(value);
        assert(fds);

        if (streq(key, "state")) {
                TimerState state;

                if ((state = timer_state_from_string(value)) < 0)
                        log_debug("Failed to parse state value %s", value);
                else
                        t->deserialized_state = state;
        } else
                log_debug("Unknown serialization key '%s'", key);

        return 0;
}

static UnitActiveState timer_active_state(Unit *u) {
        assert(u);

        return state_translation_table[TIMER(u)->state];
}

static const char *timer_sub_state_to_string(Unit *u) {
        assert(u);

        return timer_state_to_string(TIMER(u)->state);
}

static void timer_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
        Timer *t = TIMER(u);

        assert(t);
        assert(elapsed == 1);

        if (t->state != TIMER_WAITING)
                return;

        log_debug("Timer elapsed on %s", u->meta.id);
        timer_enter_running(t);
}

void timer_unit_notify(Unit *u, UnitActiveState new_state) {
        char *n;
        int r;
        Iterator i;

        if (u->meta.type == UNIT_TIMER)
                return;

        SET_FOREACH(n, u->meta.names, i) {
                char *k;
                Unit *p;
                Timer *t;
                TimerValue *v;

                if (!(k = unit_name_change_suffix(n, ".timer"))) {
                        r = -ENOMEM;
                        goto fail;
                }

                p = manager_get_unit(u->meta.manager, k);
                free(k);

                if (!p)
                        continue;

                if (p->meta.load_state != UNIT_LOADED)
                        continue;

                t = TIMER(p);

                if (t->unit != u)
                        continue;

                /* Reenable all timers that depend on unit state */
                LIST_FOREACH(value, v, t->values)
                        if (v->base == TIMER_UNIT_ACTIVE ||
                            v->base == TIMER_UNIT_INACTIVE)
                                v->disabled = false;

                switch (t->state) {

                case TIMER_WAITING:
                case TIMER_ELAPSED:

                        /* Recalculate sleep time */
                        timer_enter_waiting(t, false);
                        break;

                case TIMER_RUNNING:

                        if (UNIT_IS_INACTIVE_OR_MAINTENANCE(new_state)) {
                                log_debug("%s got notified about unit deactivation.", t->meta.id);
                                timer_enter_waiting(t, false);
                        }

                        break;

                case TIMER_DEAD:
                case TIMER_MAINTENANCE:
                        ;

                default:
                        assert_not_reached("Unknown timer state");
                }
        }

        return;

fail:
        log_error("Failed find timer unit: %s", strerror(-r));
}

static const char* const timer_state_table[_TIMER_STATE_MAX] = {
        [TIMER_DEAD] = "dead",
        [TIMER_WAITING] = "waiting",
        [TIMER_RUNNING] = "running",
        [TIMER_ELAPSED] = "elapsed",
        [TIMER_MAINTENANCE] = "maintenance"
};

DEFINE_STRING_TABLE_LOOKUP(timer_state, TimerState);

static const char* const timer_base_table[_TIMER_BASE_MAX] = {
        [TIMER_ACTIVE] = "OnActiveSec",
        [TIMER_BOOT] = "OnBootSec",
        [TIMER_STARTUP] = "OnStartupSec",
        [TIMER_UNIT_ACTIVE] = "OnUnitActiveSec",
        [TIMER_UNIT_INACTIVE] = "OnUnitInactiveSec"
};

DEFINE_STRING_TABLE_LOOKUP(timer_base, TimerBase);

const UnitVTable timer_vtable = {
        .suffix = ".timer",

        .init = timer_init,
        .done = timer_done,
        .load = timer_load,

        .coldplug = timer_coldplug,

        .dump = timer_dump,

        .start = timer_start,
        .stop = timer_stop,

        .serialize = timer_serialize,
        .deserialize_item = timer_deserialize_item,

        .active_state = timer_active_state,
        .sub_state_to_string = timer_sub_state_to_string,

        .timer_event = timer_timer_event,

        .bus_message_handler = bus_timer_message_handler
};
Commit	Line	Data
5cb5a6ff LP	1	/-- Mode: C; c-basic-offset: 8 --/
5cb5a6ff LP	2
a7334b09 LP	3	/***
	4	This file is part of systemd.
	5
	6	Copyright 2010 Lennart Poettering
	7
	8	systemd is free software; you can redistribute it and/or modify it
	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.
	12
	13	systemd is distributed in the hope that it will be useful, but
	14	WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	General Public License for more details.
	17
	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/>.
	20	***/
	21
d46de8a1 LP	22	#include <errno.h>
d46de8a1 LP	23
87f0e418	24	#include "unit.h"
871d7de4	25	#include "unit-name.h"
5cb5a6ff	26	#include "timer.h"
871d7de4	27	#include "dbus-timer.h"
a40eb732	28	#include "special.h"
871d7de4 LP	29
	30	static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = {
	31	[TIMER_DEAD] = UNIT_INACTIVE,
	32	[TIMER_WAITING] = UNIT_ACTIVE,
	33	[TIMER_RUNNING] = UNIT_ACTIVE,
	34	[TIMER_ELAPSED] = UNIT_ACTIVE,
032ff4af	35	[TIMER_MAINTENANCE] = UNIT_MAINTENANCE
871d7de4 LP	36	};
	37
	38	static void timer_init(Unit *u) {
	39	Timer *t = TIMER(u);
	40
	41	assert(u);
	42	assert(u->meta.load_state == UNIT_STUB);
	43
	44	t->next_elapse = (usec_t) -1;
871d7de4	45	}
5cb5a6ff	46
87f0e418 LP	47	static void timer_done(Unit *u) {
87f0e418 LP	48	Timer *t = TIMER(u);
871d7de4 LP	49	TimerValue *v;
	50
	51	assert(t);
	52
	53	while ((v = t->values)) {
	54	LIST_REMOVE(TimerValue, value, t->values, v);
	55	free(v);
	56	}
	57
	58	unit_unwatch_timer(u, &t->timer_watch);
	59	}
	60
	61	static int timer_verify(Timer *t) {
	62	assert(t);
	63
4cd1fbcc	64	if (t->meta.load_state != UNIT_LOADED)
871d7de4 LP	65	return 0;
	66
	67	if (!t->values) {
	68	log_error("%s lacks value setting. Refusing.", t->meta.id);
	69	return -EINVAL;
	70	}
	71
	72	return 0;
	73	}
	74
	75	static int timer_load(Unit *u) {
	76	Timer *t = TIMER(u);
	77	int r;
	78
	79	assert(u);
	80	assert(u->meta.load_state == UNIT_STUB);
	81
	82	if ((r = unit_load_fragment_and_dropin(u)) < 0)
	83	return r;
	84
	85	if (u->meta.load_state == UNIT_LOADED) {
	86
	87	if (!t->unit)
	88	if ((r = unit_load_related_unit(u, ".service", &t->unit)))
	89	return r;
	90
	91	if ((r = unit_add_dependency(u, UNIT_BEFORE, t->unit, true)) < 0)
	92	return r;
a40eb732 LP	93
	94	/* Timers shouldn't stay around on shutdown */
	95	if (t->meta.default_dependencies)
	96	if ((r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
	97	return r;
871d7de4 LP	98	}
	99
	100	return timer_verify(t);
	101	}
	102
	103	static void timer_dump(Unit u, FILE f, const char *prefix) {
	104	Timer *t = TIMER(u);
	105	const char *prefix2;
	106	char *p2;
	107	TimerValue *v;
	108	char
	109	timespan1[FORMAT_TIMESPAN_MAX];
034c6ed7	110
871d7de4 LP	111	p2 = strappend(prefix, "\t");
	112	prefix2 = p2 ? p2 : prefix;
	113
	114	fprintf(f,
	115	"%sTimer State: %s\n"
	116	"%sUnit: %s\n",
	117	prefix, timer_state_to_string(t->state),
	118	prefix, t->unit->meta.id);
	119
	120	LIST_FOREACH(value, v, t->values)
	121	fprintf(f,
	122	"%s%s: %s\n",
	123	prefix,
	124	timer_base_to_string(v->base),
	125	strna(format_timespan(timespan1, sizeof(timespan1), v->value)));
	126
	127	free(p2);
	128	}
	129
	130	static void timer_set_state(Timer *t, TimerState state) {
	131	TimerState old_state;
034c6ed7	132	assert(t);
871d7de4 LP	133
	134	old_state = t->state;
	135	t->state = state;
	136
	137	if (state != TIMER_WAITING)
	138	unit_unwatch_timer(UNIT(t), &t->timer_watch);
	139
	140	if (state != old_state)
	141	log_debug("%s changed %s -> %s",
	142	t->meta.id,
	143	timer_state_to_string(old_state),
	144	timer_state_to_string(state));
	145
	146	unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state]);
	147	}
	148
	149	static void timer_enter_waiting(Timer *t, bool initial);
	150
	151	static int timer_coldplug(Unit *u) {
	152	Timer *t = TIMER(u);
	153
	154	assert(t);
	155	assert(t->state == TIMER_DEAD);
	156
	157	if (t->deserialized_state != t->state) {
	158
	159	if (t->deserialized_state == TIMER_WAITING \|\|
	160	t->deserialized_state == TIMER_RUNNING \|\|
	161	t->deserialized_state == TIMER_ELAPSED)
	162	timer_enter_waiting(t, false);
	163	else
	164	timer_set_state(t, t->deserialized_state);
	165	}
	166
	167	return 0;
	168	}
	169
	170	static void timer_enter_dead(Timer *t, bool success) {
	171	assert(t);
	172
	173	if (!success)
	174	t->failure = true;
	175
18c78fb1	176	timer_set_state(t, t->failure ? TIMER_MAINTENANCE : TIMER_DEAD);
871d7de4 LP	177	}
	178
	179	static void timer_enter_waiting(Timer *t, bool initial) {
	180	TimerValue *v;
	181	usec_t base = 0, delay, n;
	182	bool found = false;
	183	int r;
	184
	185	n = now(CLOCK_MONOTONIC);
	186
	187	LIST_FOREACH(value, v, t->values) {
	188
	189	if (v->disabled)
	190	continue;
	191
	192	switch (v->base) {
	193
	194	case TIMER_ACTIVE:
	195	if (state_translation_table[t->state] == UNIT_ACTIVE) {
	196	base = t->meta.inactive_exit_timestamp.monotonic;
	197	} else
	198	base = n;
	199	break;
	200
	201	case TIMER_BOOT:
	202	/* CLOCK_MONOTONIC equals the uptime on Linux */
	203	base = 0;
	204	break;
	205
	206	case TIMER_STARTUP:
	207	base = t->meta.manager->startup_timestamp.monotonic;
	208	break;
	209
	210	case TIMER_UNIT_ACTIVE:
	211
	212	if (t->unit->meta.inactive_exit_timestamp.monotonic <= 0)
	213	continue;
	214
	215	base = t->unit->meta.inactive_exit_timestamp.monotonic;
	216	break;
	217
	218	case TIMER_UNIT_INACTIVE:
	219
	220	if (t->unit->meta.inactive_enter_timestamp.monotonic <= 0)
	221	continue;
	222
	223	base = t->unit->meta.inactive_enter_timestamp.monotonic;
	224	break;
	225
	226	default:
	227	assert_not_reached("Unknown timer base");
	228	}
	229
	230	v->next_elapse = base + v->value;
	231
	232	if (!initial && v->next_elapse < n) {
	233	v->disabled = true;
	234	continue;
	235	}
	236
	237	if (!found)
	238	t->next_elapse = v->next_elapse;
	239	else
	240	t->next_elapse = MIN(t->next_elapse, v->next_elapse);
241
242	found = true;
243	}
244
245	if (!found) {
246	timer_set_state(t, TIMER_ELAPSED);
247	return;
248	}
249
250	delay = n < t->next_elapse ? t->next_elapse - n : 0;
251
252	if ((r = unit_watch_timer(UNIT(t), delay, &t->timer_watch)) < 0)
253	goto fail;
254
255	timer_set_state(t, TIMER_WAITING);
256	return;
257
258	fail:
259	log_warning("%s failed to enter waiting state: %s", t->meta.id, strerror(-r));
260	timer_enter_dead(t, false);
261	}
262
263	static void timer_enter_running(Timer *t) {
264	int r;
265	assert(t);
266
4cd1fbcc	267	if ((r = manager_add_job(t->meta.manager, JOB_START, t->unit, JOB_REPLACE, true, NULL)) < 0)
871d7de4 LP	268	goto fail;
	269
	270	timer_set_state(t, TIMER_RUNNING);
	271	return;
	272
	273	fail:
	274	log_warning("%s failed to queue unit startup job: %s", t->meta.id, strerror(-r));
	275	timer_enter_dead(t, false);
	276	}
	277
	278	static int timer_start(Unit *u) {
	279	Timer *t = TIMER(u);
	280
	281	assert(t);
18c78fb1	282	assert(t->state == TIMER_DEAD \|\| t->state == TIMER_MAINTENANCE);
01f78473 LP	283
	284	if (t->unit->meta.load_state != UNIT_LOADED)
	285	return -ENOENT;
871d7de4	286
01f78473	287	t->failure = false;
871d7de4 LP	288	timer_enter_waiting(t, true);
	289	return 0;
	290	}
	291
	292	static int timer_stop(Unit *u) {
	293	Timer *t = TIMER(u);
	294
	295	assert(t);
	296	assert(t->state == TIMER_WAITING \|\| t->state == TIMER_RUNNING \|\| t->state == TIMER_ELAPSED);
	297
	298	timer_enter_dead(t, true);
	299	return 0;
	300	}
	301
	302	static int timer_serialize(Unit u, FILE f, FDSet *fds) {
	303	Timer *t = TIMER(u);
	304
	305	assert(u);
	306	assert(f);
	307	assert(fds);
	308
	309	unit_serialize_item(u, f, "state", timer_state_to_string(t->state));
	310
	311	return 0;
	312	}
	313
	314	static int timer_deserialize_item(Unit u, const char key, const char value, FDSet fds) {
	315	Timer *t = TIMER(u);
	316
	317	assert(u);
	318	assert(key);
	319	assert(value);
	320	assert(fds);
	321
	322	if (streq(key, "state")) {
	323	TimerState state;
	324
	325	if ((state = timer_state_from_string(value)) < 0)
	326	log_debug("Failed to parse state value %s", value);
	327	else
	328	t->deserialized_state = state;
	329	} else
	330	log_debug("Unknown serialization key '%s'", key);
	331
	332	return 0;
034c6ed7 LP	333	}
034c6ed7 LP	334
87f0e418	335	static UnitActiveState timer_active_state(Unit *u) {
871d7de4 LP	336	assert(u);
	337
	338	return state_translation_table[TIMER(u)->state];
	339	}
	340
	341	static const char timer_sub_state_to_string(Unit u) {
	342	assert(u);
	343
	344	return timer_state_to_string(TIMER(u)->state);
	345	}
	346
	347	static void timer_timer_event(Unit u, uint64_t elapsed, Watch w) {
	348	Timer *t = TIMER(u);
	349
	350	assert(t);
	351	assert(elapsed == 1);
5cb5a6ff	352
871d7de4 LP	353	if (t->state != TIMER_WAITING)
871d7de4 LP	354	return;
5cb5a6ff	355
871d7de4 LP	356	log_debug("Timer elapsed on %s", u->meta.id);
871d7de4 LP	357	timer_enter_running(t);
5cb5a6ff LP	358	}
5cb5a6ff LP	359
871d7de4 LP	360	void timer_unit_notify(Unit *u, UnitActiveState new_state) {
	361	char *n;
	362	int r;
	363	Iterator i;
	364
	365	if (u->meta.type == UNIT_TIMER)
	366	return;
	367
	368	SET_FOREACH(n, u->meta.names, i) {
	369	char *k;
	370	Unit *p;
	371	Timer *t;
	372	TimerValue *v;
	373
	374	if (!(k = unit_name_change_suffix(n, ".timer"))) {
	375	r = -ENOMEM;
	376	goto fail;
	377	}
	378
	379	p = manager_get_unit(u->meta.manager, k);
	380	free(k);
	381
	382	if (!p)
	383	continue;
	384
01f78473 LP	385	if (p->meta.load_state != UNIT_LOADED)
	386	continue;
	387
871d7de4 LP	388	t = TIMER(p);
871d7de4 LP	389
01f78473	390	if (t->unit != u)
871d7de4 LP	391	continue;
	392
	393	/* Reenable all timers that depend on unit state */
	394	LIST_FOREACH(value, v, t->values)
	395	if (v->base == TIMER_UNIT_ACTIVE \|\|
	396	v->base == TIMER_UNIT_INACTIVE)
	397	v->disabled = false;
	398
	399	switch (t->state) {
	400
	401	case TIMER_WAITING:
	402	case TIMER_ELAPSED:
	403
	404	/* Recalculate sleep time */
	405	timer_enter_waiting(t, false);
	406	break;
	407
	408	case TIMER_RUNNING:
	409
6124958c	410	if (UNIT_IS_INACTIVE_OR_MAINTENANCE(new_state)) {
871d7de4 LP	411	log_debug("%s got notified about unit deactivation.", t->meta.id);
	412	timer_enter_waiting(t, false);
	413	}
	414
	415	break;
	416
	417	case TIMER_DEAD:
18c78fb1	418	case TIMER_MAINTENANCE:
871d7de4 LP	419	;
	420
	421	default:
	422	assert_not_reached("Unknown timer state");
	423	}
	424	}
	425
	426	return;
	427
	428	fail:
	429	log_error("Failed find timer unit: %s", strerror(-r));
	430	}
	431
	432	static const char* const timer_state_table[_TIMER_STATE_MAX] = {
	433	[TIMER_DEAD] = "dead",
	434	[TIMER_WAITING] = "waiting",
	435	[TIMER_RUNNING] = "running",
	436	[TIMER_ELAPSED] = "elapsed",
18c78fb1	437	[TIMER_MAINTENANCE] = "maintenance"
871d7de4 LP	438	};
	439
	440	DEFINE_STRING_TABLE_LOOKUP(timer_state, TimerState);
	441
	442	static const char* const timer_base_table[_TIMER_BASE_MAX] = {
03fae018 LP	443	[TIMER_ACTIVE] = "OnActiveSec",
	444	[TIMER_BOOT] = "OnBootSec",
	445	[TIMER_STARTUP] = "OnStartupSec",
	446	[TIMER_UNIT_ACTIVE] = "OnUnitActiveSec",
	447	[TIMER_UNIT_INACTIVE] = "OnUnitInactiveSec"
871d7de4 LP	448	};
	449
	450	DEFINE_STRING_TABLE_LOOKUP(timer_base, TimerBase);
	451
87f0e418	452	const UnitVTable timer_vtable = {
5cb5a6ff LP	453	.suffix = ".timer",
5cb5a6ff LP	454
871d7de4	455	.init = timer_init,
034c6ed7	456	.done = timer_done,
871d7de4 LP	457	.load = timer_load,
	458
	459	.coldplug = timer_coldplug,
	460
	461	.dump = timer_dump,
	462
	463	.start = timer_start,
	464	.stop = timer_stop,
	465
	466	.serialize = timer_serialize,
	467	.deserialize_item = timer_deserialize_item,
	468
	469	.active_state = timer_active_state,
	470	.sub_state_to_string = timer_sub_state_to_string,
	471
	472	.timer_event = timer_timer_event,
5cb5a6ff	473
871d7de4	474	.bus_message_handler = bus_timer_message_handler
5cb5a6ff	475	};