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_two_dependencies_by_name(UNIT(t
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, NULL
, true)) < 0)
85 return unit_add_two_dependencies_by_name(UNIT(t
), UNIT_BEFORE
, UNIT_CONFLICTED_BY
, SPECIAL_SHUTDOWN_TARGET
, NULL
, true);
88 static int timer_load(Unit
*u
) {
93 assert(u
->meta
.load_state
== UNIT_STUB
);
95 if ((r
= unit_load_fragment_and_dropin(u
)) < 0)
98 if (u
->meta
.load_state
== UNIT_LOADED
) {
101 if ((r
= unit_load_related_unit(u
, ".service", &t
->unit
)))
104 if ((r
= unit_add_dependency(u
, UNIT_BEFORE
, t
->unit
, true)) < 0)
107 if (t
->meta
.default_dependencies
)
108 if ((r
= timer_add_default_dependencies(t
)) < 0)
112 return timer_verify(t
);
115 static void timer_dump(Unit
*u
, FILE *f
, const char *prefix
) {
119 timespan1
[FORMAT_TIMESPAN_MAX
];
122 "%sTimer State: %s\n"
124 prefix
, timer_state_to_string(t
->state
),
125 prefix
, t
->unit
->meta
.id
);
127 LIST_FOREACH(value
, v
, t
->values
)
131 timer_base_to_string(v
->base
),
132 strna(format_timespan(timespan1
, sizeof(timespan1
), v
->value
)));
135 static void timer_set_state(Timer
*t
, TimerState state
) {
136 TimerState old_state
;
139 old_state
= t
->state
;
142 if (state
!= TIMER_WAITING
)
143 unit_unwatch_timer(UNIT(t
), &t
->timer_watch
);
145 if (state
!= old_state
)
146 log_debug("%s changed %s -> %s",
148 timer_state_to_string(old_state
),
149 timer_state_to_string(state
));
151 unit_notify(UNIT(t
), state_translation_table
[old_state
], state_translation_table
[state
]);
154 static void timer_enter_waiting(Timer
*t
, bool initial
);
156 static int timer_coldplug(Unit
*u
) {
160 assert(t
->state
== TIMER_DEAD
);
162 if (t
->deserialized_state
!= t
->state
) {
164 if (t
->deserialized_state
== TIMER_WAITING
||
165 t
->deserialized_state
== TIMER_RUNNING
||
166 t
->deserialized_state
== TIMER_ELAPSED
)
167 timer_enter_waiting(t
, false);
169 timer_set_state(t
, t
->deserialized_state
);
175 static void timer_enter_dead(Timer
*t
, bool success
) {
181 timer_set_state(t
, t
->failure
? TIMER_FAILED
: TIMER_DEAD
);
184 static void timer_enter_waiting(Timer
*t
, bool initial
) {
186 usec_t base
= 0, delay
, n
;
190 n
= now(CLOCK_MONOTONIC
);
192 LIST_FOREACH(value
, v
, t
->values
) {
200 if (state_translation_table
[t
->state
] == UNIT_ACTIVE
)
201 base
= t
->meta
.inactive_exit_timestamp
.monotonic
;
207 /* CLOCK_MONOTONIC equals the uptime on Linux */
212 base
= t
->meta
.manager
->startup_timestamp
.monotonic
;
215 case TIMER_UNIT_ACTIVE
:
217 if (t
->unit
->meta
.inactive_exit_timestamp
.monotonic
<= 0)
220 base
= t
->unit
->meta
.inactive_exit_timestamp
.monotonic
;
223 case TIMER_UNIT_INACTIVE
:
225 if (t
->unit
->meta
.inactive_enter_timestamp
.monotonic
<= 0)
228 base
= t
->unit
->meta
.inactive_enter_timestamp
.monotonic
;
232 assert_not_reached("Unknown timer base");
235 v
->next_elapse
= base
+ v
->value
;
237 if (!initial
&& v
->next_elapse
< n
) {
243 t
->next_elapse
= v
->next_elapse
;
245 t
->next_elapse
= MIN(t
->next_elapse
, v
->next_elapse
);
251 timer_set_state(t
, TIMER_ELAPSED
);
255 delay
= n
< t
->next_elapse
? t
->next_elapse
- n
: 0;
257 if ((r
= unit_watch_timer(UNIT(t
), delay
, &t
->timer_watch
)) < 0)
260 timer_set_state(t
, TIMER_WAITING
);
264 log_warning("%s failed to enter waiting state: %s", t
->meta
.id
, strerror(-r
));
265 timer_enter_dead(t
, false);
268 static void timer_enter_running(Timer
*t
) {
273 dbus_error_init(&error
);
275 /* Don't start job if we are supposed to go down */
276 if (t
->meta
.job
&& t
->meta
.job
->type
== JOB_STOP
)
279 if ((r
= manager_add_job(t
->meta
.manager
, JOB_START
, t
->unit
, JOB_REPLACE
, true, &error
, NULL
)) < 0)
282 timer_set_state(t
, TIMER_RUNNING
);
286 log_warning("%s failed to queue unit startup job: %s", t
->meta
.id
, bus_error(&error
, r
));
287 timer_enter_dead(t
, false);
289 dbus_error_free(&error
);
292 static int timer_start(Unit
*u
) {
296 assert(t
->state
== TIMER_DEAD
|| t
->state
== TIMER_FAILED
);
298 if (t
->unit
->meta
.load_state
!= UNIT_LOADED
)
302 timer_enter_waiting(t
, true);
306 static int timer_stop(Unit
*u
) {
310 assert(t
->state
== TIMER_WAITING
|| t
->state
== TIMER_RUNNING
|| t
->state
== TIMER_ELAPSED
);
312 timer_enter_dead(t
, true);
316 static int timer_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
323 unit_serialize_item(u
, f
, "state", timer_state_to_string(t
->state
));
328 static int timer_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
336 if (streq(key
, "state")) {
339 if ((state
= timer_state_from_string(value
)) < 0)
340 log_debug("Failed to parse state value %s", value
);
342 t
->deserialized_state
= state
;
344 log_debug("Unknown serialization key '%s'", key
);
349 static UnitActiveState
timer_active_state(Unit
*u
) {
352 return state_translation_table
[TIMER(u
)->state
];
355 static const char *timer_sub_state_to_string(Unit
*u
) {
358 return timer_state_to_string(TIMER(u
)->state
);
361 static void timer_timer_event(Unit
*u
, uint64_t elapsed
, Watch
*w
) {
365 assert(elapsed
== 1);
367 if (t
->state
!= TIMER_WAITING
)
370 log_debug("Timer elapsed on %s", u
->meta
.id
);
371 timer_enter_running(t
);
374 void timer_unit_notify(Unit
*u
, UnitActiveState new_state
) {
379 if (u
->meta
.type
== UNIT_TIMER
)
382 SET_FOREACH(n
, u
->meta
.names
, i
) {
388 if (!(k
= unit_name_change_suffix(n
, ".timer"))) {
393 p
= manager_get_unit(u
->meta
.manager
, k
);
399 if (p
->meta
.load_state
!= UNIT_LOADED
)
407 /* Reenable all timers that depend on unit state */
408 LIST_FOREACH(value
, v
, t
->values
)
409 if (v
->base
== TIMER_UNIT_ACTIVE
||
410 v
->base
== TIMER_UNIT_INACTIVE
)
418 /* Recalculate sleep time */
419 timer_enter_waiting(t
, false);
424 if (UNIT_IS_INACTIVE_OR_FAILED(new_state
)) {
425 log_debug("%s got notified about unit deactivation.", t
->meta
.id
);
426 timer_enter_waiting(t
, false);
436 assert_not_reached("Unknown timer state");
443 log_error("Failed find timer unit: %s", strerror(-r
));
446 static void timer_reset_failed(Unit
*u
) {
451 if (t
->state
== TIMER_FAILED
)
452 timer_set_state(t
, TIMER_DEAD
);
457 static const char* const timer_state_table
[_TIMER_STATE_MAX
] = {
458 [TIMER_DEAD
] = "dead",
459 [TIMER_WAITING
] = "waiting",
460 [TIMER_RUNNING
] = "running",
461 [TIMER_ELAPSED
] = "elapsed",
462 [TIMER_FAILED
] = "failed"
465 DEFINE_STRING_TABLE_LOOKUP(timer_state
, TimerState
);
467 static const char* const timer_base_table
[_TIMER_BASE_MAX
] = {
468 [TIMER_ACTIVE
] = "OnActiveSec",
469 [TIMER_BOOT
] = "OnBootSec",
470 [TIMER_STARTUP
] = "OnStartupSec",
471 [TIMER_UNIT_ACTIVE
] = "OnUnitActiveSec",
472 [TIMER_UNIT_INACTIVE
] = "OnUnitInactiveSec"
475 DEFINE_STRING_TABLE_LOOKUP(timer_base
, TimerBase
);
477 const UnitVTable timer_vtable
= {
484 .coldplug
= timer_coldplug
,
488 .start
= timer_start
,
491 .serialize
= timer_serialize
,
492 .deserialize_item
= timer_deserialize_item
,
494 .active_state
= timer_active_state
,
495 .sub_state_to_string
= timer_sub_state_to_string
,
497 .timer_event
= timer_timer_event
,
499 .reset_failed
= timer_reset_failed
,
501 .bus_interface
= "org.freedesktop.systemd1.Timer",
502 .bus_message_handler
= bus_timer_message_handler
,
503 .bus_invalidating_properties
= bus_timer_invalidating_properties