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
);
62 static int timer_verify(Timer
*t
) {
65 if (t
->meta
.load_state
!= UNIT_LOADED
)
69 log_error("%s lacks value setting. Refusing.", t
->meta
.id
);
76 static int timer_add_default_dependencies(Timer
*t
) {
81 if (t
->meta
.manager
->running_as
== MANAGER_SYSTEM
) {
82 if ((r
= unit_add_dependency_by_name(UNIT(t
), UNIT_BEFORE
, SPECIAL_BASIC_TARGET
, NULL
, true)) < 0)
85 if ((r
= unit_add_two_dependencies_by_name(UNIT(t
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, NULL
, true)) < 0)
89 return unit_add_two_dependencies_by_name(UNIT(t
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, NULL
, true);
92 static int timer_load(Unit
*u
) {
97 assert(u
->meta
.load_state
== UNIT_STUB
);
99 if ((r
= unit_load_fragment_and_dropin(u
)) < 0)
102 if (u
->meta
.load_state
== UNIT_LOADED
) {
105 if ((r
= unit_load_related_unit(u
, ".service", &t
->unit
)))
108 if ((r
= unit_add_dependency(u
, UNIT_BEFORE
, t
->unit
, true)) < 0)
111 if (t
->meta
.default_dependencies
)
112 if ((r
= timer_add_default_dependencies(t
)) < 0)
116 return timer_verify(t
);
119 static void timer_dump(Unit
*u
, FILE *f
, const char *prefix
) {
123 timespan1
[FORMAT_TIMESPAN_MAX
];
126 "%sTimer State: %s\n"
128 prefix
, timer_state_to_string(t
->state
),
129 prefix
, t
->unit
->meta
.id
);
131 LIST_FOREACH(value
, v
, t
->values
)
135 timer_base_to_string(v
->base
),
136 strna(format_timespan(timespan1
, sizeof(timespan1
), v
->value
)));
139 static void timer_set_state(Timer
*t
, TimerState state
) {
140 TimerState old_state
;
143 old_state
= t
->state
;
146 if (state
!= TIMER_WAITING
)
147 unit_unwatch_timer(UNIT(t
), &t
->timer_watch
);
149 if (state
!= old_state
)
150 log_debug("%s changed %s -> %s",
152 timer_state_to_string(old_state
),
153 timer_state_to_string(state
));
155 unit_notify(UNIT(t
), state_translation_table
[old_state
], state_translation_table
[state
], true);
158 static void timer_enter_waiting(Timer
*t
, bool initial
);
160 static int timer_coldplug(Unit
*u
) {
164 assert(t
->state
== TIMER_DEAD
);
166 if (t
->deserialized_state
!= t
->state
) {
168 if (t
->deserialized_state
== TIMER_WAITING
)
169 timer_enter_waiting(t
, false);
171 timer_set_state(t
, t
->deserialized_state
);
177 static void timer_enter_dead(Timer
*t
, bool success
) {
183 timer_set_state(t
, t
->failure
? TIMER_FAILED
: TIMER_DEAD
);
186 static void timer_enter_waiting(Timer
*t
, bool initial
) {
188 usec_t base
= 0, delay
, n
;
192 n
= now(CLOCK_MONOTONIC
);
194 LIST_FOREACH(value
, v
, t
->values
) {
202 if (state_translation_table
[t
->state
] == UNIT_ACTIVE
)
203 base
= t
->meta
.inactive_exit_timestamp
.monotonic
;
209 /* CLOCK_MONOTONIC equals the uptime on Linux */
214 base
= t
->meta
.manager
->startup_timestamp
.monotonic
;
217 case TIMER_UNIT_ACTIVE
:
219 if (t
->unit
->meta
.inactive_exit_timestamp
.monotonic
<= 0)
222 base
= t
->unit
->meta
.inactive_exit_timestamp
.monotonic
;
225 case TIMER_UNIT_INACTIVE
:
227 if (t
->unit
->meta
.inactive_enter_timestamp
.monotonic
<= 0)
230 base
= t
->unit
->meta
.inactive_enter_timestamp
.monotonic
;
234 assert_not_reached("Unknown timer base");
237 v
->next_elapse
= base
+ v
->value
;
239 if (!initial
&& v
->next_elapse
< n
) {
245 t
->next_elapse
= v
->next_elapse
;
247 t
->next_elapse
= MIN(t
->next_elapse
, v
->next_elapse
);
253 timer_set_state(t
, TIMER_ELAPSED
);
257 delay
= n
< t
->next_elapse
? t
->next_elapse
- n
: 0;
259 if ((r
= unit_watch_timer(UNIT(t
), delay
, &t
->timer_watch
)) < 0)
262 timer_set_state(t
, TIMER_WAITING
);
266 log_warning("%s failed to enter waiting state: %s", t
->meta
.id
, strerror(-r
));
267 timer_enter_dead(t
, false);
270 static void timer_enter_running(Timer
*t
) {
275 dbus_error_init(&error
);
277 /* Don't start job if we are supposed to go down */
278 if (t
->meta
.job
&& t
->meta
.job
->type
== JOB_STOP
)
281 if ((r
= manager_add_job(t
->meta
.manager
, JOB_START
, t
->unit
, JOB_REPLACE
, true, &error
, NULL
)) < 0)
284 timer_set_state(t
, TIMER_RUNNING
);
288 log_warning("%s failed to queue unit startup job: %s", t
->meta
.id
, bus_error(&error
, r
));
289 timer_enter_dead(t
, false);
291 dbus_error_free(&error
);
294 static int timer_start(Unit
*u
) {
298 assert(t
->state
== TIMER_DEAD
|| t
->state
== TIMER_FAILED
);
300 if (t
->unit
->meta
.load_state
!= UNIT_LOADED
)
304 timer_enter_waiting(t
, true);
308 static int timer_stop(Unit
*u
) {
312 assert(t
->state
== TIMER_WAITING
|| t
->state
== TIMER_RUNNING
|| t
->state
== TIMER_ELAPSED
);
314 timer_enter_dead(t
, true);
318 static int timer_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
325 unit_serialize_item(u
, f
, "state", timer_state_to_string(t
->state
));
330 static int timer_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
338 if (streq(key
, "state")) {
341 if ((state
= timer_state_from_string(value
)) < 0)
342 log_debug("Failed to parse state value %s", value
);
344 t
->deserialized_state
= state
;
346 log_debug("Unknown serialization key '%s'", key
);
351 static UnitActiveState
timer_active_state(Unit
*u
) {
354 return state_translation_table
[TIMER(u
)->state
];
357 static const char *timer_sub_state_to_string(Unit
*u
) {
360 return timer_state_to_string(TIMER(u
)->state
);
363 static void timer_timer_event(Unit
*u
, uint64_t elapsed
, Watch
*w
) {
367 assert(elapsed
== 1);
369 if (t
->state
!= TIMER_WAITING
)
372 log_debug("Timer elapsed on %s", u
->meta
.id
);
373 timer_enter_running(t
);
376 void timer_unit_notify(Unit
*u
, UnitActiveState new_state
) {
381 if (u
->meta
.type
== UNIT_TIMER
)
384 SET_FOREACH(n
, u
->meta
.names
, i
) {
390 if (!(k
= unit_name_change_suffix(n
, ".timer"))) {
395 p
= manager_get_unit(u
->meta
.manager
, k
);
401 if (p
->meta
.load_state
!= UNIT_LOADED
)
409 /* Reenable all timers that depend on unit state */
410 LIST_FOREACH(value
, v
, t
->values
)
411 if (v
->base
== TIMER_UNIT_ACTIVE
||
412 v
->base
== TIMER_UNIT_INACTIVE
)
420 /* Recalculate sleep time */
421 timer_enter_waiting(t
, false);
426 if (UNIT_IS_INACTIVE_OR_FAILED(new_state
)) {
427 log_debug("%s got notified about unit deactivation.", t
->meta
.id
);
428 timer_enter_waiting(t
, false);
438 assert_not_reached("Unknown timer state");
445 log_error("Failed find timer unit: %s", strerror(-r
));
448 static void timer_reset_failed(Unit
*u
) {
453 if (t
->state
== TIMER_FAILED
)
454 timer_set_state(t
, TIMER_DEAD
);
459 static const char* const timer_state_table
[_TIMER_STATE_MAX
] = {
460 [TIMER_DEAD
] = "dead",
461 [TIMER_WAITING
] = "waiting",
462 [TIMER_RUNNING
] = "running",
463 [TIMER_ELAPSED
] = "elapsed",
464 [TIMER_FAILED
] = "failed"
467 DEFINE_STRING_TABLE_LOOKUP(timer_state
, TimerState
);
469 static const char* const timer_base_table
[_TIMER_BASE_MAX
] = {
470 [TIMER_ACTIVE
] = "OnActiveSec",
471 [TIMER_BOOT
] = "OnBootSec",
472 [TIMER_STARTUP
] = "OnStartupSec",
473 [TIMER_UNIT_ACTIVE
] = "OnUnitActiveSec",
474 [TIMER_UNIT_INACTIVE
] = "OnUnitInactiveSec"
477 DEFINE_STRING_TABLE_LOOKUP(timer_base
, TimerBase
);
479 const UnitVTable timer_vtable
= {
490 .coldplug
= timer_coldplug
,
494 .start
= timer_start
,
497 .serialize
= timer_serialize
,
498 .deserialize_item
= timer_deserialize_item
,
500 .active_state
= timer_active_state
,
501 .sub_state_to_string
= timer_sub_state_to_string
,
503 .timer_event
= timer_timer_event
,
505 .reset_failed
= timer_reset_failed
,
507 .bus_interface
= "org.freedesktop.systemd1.Timer",
508 .bus_message_handler
= bus_timer_message_handler
,
509 .bus_invalidating_properties
= bus_timer_invalidating_properties