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
->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
->load_state
== UNIT_STUB
);
101 if ((r
= unit_load_fragment_and_dropin(u
)) < 0)
104 if (u
->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
)->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
)->inactive_exit_timestamp
.monotonic
<= 0)
231 base
= UNIT_DEREF(t
->unit
)->inactive_exit_timestamp
.monotonic
;
234 case TIMER_UNIT_INACTIVE
:
236 if (UNIT_DEREF(t
->unit
)->inactive_enter_timestamp
.monotonic
<= 0)
239 base
= UNIT_DEREF(t
->unit
)->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
)->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
->id
);
382 timer_enter_running(t
);
385 void timer_unit_notify(Unit
*u
, UnitActiveState new_state
) {
389 if (u
->type
== UNIT_TIMER
)
392 SET_FOREACH(k
, u
->dependencies
[UNIT_TRIGGERED_BY
], i
) {
396 if (k
->type
!= UNIT_TIMER
)
399 if (k
->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
= {
471 .object_size
= sizeof(Timer
),
481 .coldplug
= timer_coldplug
,
485 .start
= timer_start
,
488 .serialize
= timer_serialize
,
489 .deserialize_item
= timer_deserialize_item
,
491 .active_state
= timer_active_state
,
492 .sub_state_to_string
= timer_sub_state_to_string
,
494 .timer_event
= timer_timer_event
,
496 .reset_failed
= timer_reset_failed
,
498 .bus_interface
= "org.freedesktop.systemd1.Timer",
499 .bus_message_handler
= bus_timer_message_handler
,
500 .bus_invalidating_properties
= bus_timer_invalidating_properties