1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
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 static const UnitActiveState state_translation_table
[_TIMER_STATE_MAX
] = {
30 [TIMER_DEAD
] = UNIT_INACTIVE
,
31 [TIMER_WAITING
] = UNIT_ACTIVE
,
32 [TIMER_RUNNING
] = UNIT_ACTIVE
,
33 [TIMER_ELAPSED
] = UNIT_ACTIVE
,
34 [TIMER_MAINTAINANCE
] = UNIT_INACTIVE
37 static void timer_init(Unit
*u
) {
41 assert(u
->meta
.load_state
== UNIT_STUB
);
43 t
->next_elapse
= (usec_t
) -1;
46 static void timer_done(Unit
*u
) {
52 while ((v
= t
->values
)) {
53 LIST_REMOVE(TimerValue
, value
, t
->values
, v
);
57 unit_unwatch_timer(u
, &t
->timer_watch
);
60 static int timer_verify(Timer
*t
) {
63 if (UNIT(t
)->meta
.load_state
!= UNIT_LOADED
)
67 log_error("%s lacks value setting. Refusing.", t
->meta
.id
);
74 static int timer_load(Unit
*u
) {
79 assert(u
->meta
.load_state
== UNIT_STUB
);
81 if ((r
= unit_load_fragment_and_dropin(u
)) < 0)
84 if (u
->meta
.load_state
== UNIT_LOADED
) {
87 if ((r
= unit_load_related_unit(u
, ".service", &t
->unit
)))
90 if ((r
= unit_add_dependency(u
, UNIT_BEFORE
, t
->unit
, true)) < 0)
94 return timer_verify(t
);
97 static void timer_dump(Unit
*u
, FILE *f
, const char *prefix
) {
103 timespan1
[FORMAT_TIMESPAN_MAX
];
105 p2
= strappend(prefix
, "\t");
106 prefix2
= p2
? p2
: prefix
;
109 "%sTimer State: %s\n"
111 prefix
, timer_state_to_string(t
->state
),
112 prefix
, t
->unit
->meta
.id
);
114 LIST_FOREACH(value
, v
, t
->values
)
118 timer_base_to_string(v
->base
),
119 strna(format_timespan(timespan1
, sizeof(timespan1
), v
->value
)));
124 static void timer_set_state(Timer
*t
, TimerState state
) {
125 TimerState old_state
;
128 old_state
= t
->state
;
131 if (state
!= TIMER_WAITING
)
132 unit_unwatch_timer(UNIT(t
), &t
->timer_watch
);
134 if (state
!= old_state
)
135 log_debug("%s changed %s -> %s",
137 timer_state_to_string(old_state
),
138 timer_state_to_string(state
));
140 unit_notify(UNIT(t
), state_translation_table
[old_state
], state_translation_table
[state
]);
143 static void timer_enter_waiting(Timer
*t
, bool initial
);
145 static int timer_coldplug(Unit
*u
) {
149 assert(t
->state
== TIMER_DEAD
);
151 if (t
->deserialized_state
!= t
->state
) {
153 if (t
->deserialized_state
== TIMER_WAITING
||
154 t
->deserialized_state
== TIMER_RUNNING
||
155 t
->deserialized_state
== TIMER_ELAPSED
)
156 timer_enter_waiting(t
, false);
158 timer_set_state(t
, t
->deserialized_state
);
164 static void timer_enter_dead(Timer
*t
, bool success
) {
170 timer_set_state(t
, t
->failure
? TIMER_MAINTAINANCE
: TIMER_DEAD
);
173 static void timer_enter_waiting(Timer
*t
, bool initial
) {
175 usec_t base
= 0, delay
, n
;
179 n
= now(CLOCK_MONOTONIC
);
181 LIST_FOREACH(value
, v
, t
->values
) {
189 if (state_translation_table
[t
->state
] == UNIT_ACTIVE
) {
190 base
= t
->meta
.inactive_exit_timestamp
.monotonic
;
196 /* CLOCK_MONOTONIC equals the uptime on Linux */
201 base
= t
->meta
.manager
->startup_timestamp
.monotonic
;
204 case TIMER_UNIT_ACTIVE
:
206 if (t
->unit
->meta
.inactive_exit_timestamp
.monotonic
<= 0)
209 base
= t
->unit
->meta
.inactive_exit_timestamp
.monotonic
;
212 case TIMER_UNIT_INACTIVE
:
214 if (t
->unit
->meta
.inactive_enter_timestamp
.monotonic
<= 0)
217 base
= t
->unit
->meta
.inactive_enter_timestamp
.monotonic
;
221 assert_not_reached("Unknown timer base");
224 v
->next_elapse
= base
+ v
->value
;
226 if (!initial
&& v
->next_elapse
< n
) {
232 t
->next_elapse
= v
->next_elapse
;
234 t
->next_elapse
= MIN(t
->next_elapse
, v
->next_elapse
);
240 timer_set_state(t
, TIMER_ELAPSED
);
244 delay
= n
< t
->next_elapse
? t
->next_elapse
- n
: 0;
246 if ((r
= unit_watch_timer(UNIT(t
), delay
, &t
->timer_watch
)) < 0)
249 timer_set_state(t
, TIMER_WAITING
);
253 log_warning("%s failed to enter waiting state: %s", t
->meta
.id
, strerror(-r
));
254 timer_enter_dead(t
, false);
257 static void timer_enter_running(Timer
*t
) {
261 if ((r
= manager_add_job(UNIT(t
)->meta
.manager
, JOB_START
, t
->unit
, JOB_REPLACE
, true, NULL
)) < 0)
264 timer_set_state(t
, TIMER_RUNNING
);
268 log_warning("%s failed to queue unit startup job: %s", t
->meta
.id
, strerror(-r
));
269 timer_enter_dead(t
, false);
272 static int timer_start(Unit
*u
) {
276 assert(t
->state
== TIMER_DEAD
|| t
->state
== TIMER_MAINTAINANCE
);
278 if (t
->unit
->meta
.load_state
!= UNIT_LOADED
)
282 timer_enter_waiting(t
, true);
286 static int timer_stop(Unit
*u
) {
290 assert(t
->state
== TIMER_WAITING
|| t
->state
== TIMER_RUNNING
|| t
->state
== TIMER_ELAPSED
);
292 timer_enter_dead(t
, true);
296 static int timer_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
303 unit_serialize_item(u
, f
, "state", timer_state_to_string(t
->state
));
308 static int timer_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
316 if (streq(key
, "state")) {
319 if ((state
= timer_state_from_string(value
)) < 0)
320 log_debug("Failed to parse state value %s", value
);
322 t
->deserialized_state
= state
;
324 log_debug("Unknown serialization key '%s'", key
);
329 static UnitActiveState
timer_active_state(Unit
*u
) {
332 return state_translation_table
[TIMER(u
)->state
];
335 static const char *timer_sub_state_to_string(Unit
*u
) {
338 return timer_state_to_string(TIMER(u
)->state
);
341 static void timer_timer_event(Unit
*u
, uint64_t elapsed
, Watch
*w
) {
345 assert(elapsed
== 1);
347 if (t
->state
!= TIMER_WAITING
)
350 log_debug("Timer elapsed on %s", u
->meta
.id
);
351 timer_enter_running(t
);
354 void timer_unit_notify(Unit
*u
, UnitActiveState new_state
) {
359 if (u
->meta
.type
== UNIT_TIMER
)
362 SET_FOREACH(n
, u
->meta
.names
, i
) {
368 if (!(k
= unit_name_change_suffix(n
, ".timer"))) {
373 p
= manager_get_unit(u
->meta
.manager
, k
);
379 if (p
->meta
.load_state
!= UNIT_LOADED
)
387 /* Reenable all timers that depend on unit state */
388 LIST_FOREACH(value
, v
, t
->values
)
389 if (v
->base
== TIMER_UNIT_ACTIVE
||
390 v
->base
== TIMER_UNIT_INACTIVE
)
398 /* Recalculate sleep time */
399 timer_enter_waiting(t
, false);
404 if (new_state
== UNIT_INACTIVE
) {
405 log_debug("%s got notified about unit deactivation.", t
->meta
.id
);
406 timer_enter_waiting(t
, false);
412 case TIMER_MAINTAINANCE
:
416 assert_not_reached("Unknown timer state");
423 log_error("Failed find timer unit: %s", strerror(-r
));
426 static const char* const timer_state_table
[_TIMER_STATE_MAX
] = {
427 [TIMER_DEAD
] = "dead",
428 [TIMER_WAITING
] = "waiting",
429 [TIMER_RUNNING
] = "running",
430 [TIMER_ELAPSED
] = "elapsed",
431 [TIMER_MAINTAINANCE
] = "maintainance"
434 DEFINE_STRING_TABLE_LOOKUP(timer_state
, TimerState
);
436 static const char* const timer_base_table
[_TIMER_BASE_MAX
] = {
437 [TIMER_ACTIVE
] = "OnActive",
438 [TIMER_BOOT
] = "OnBoot",
439 [TIMER_STARTUP
] = "OnStartup",
440 [TIMER_UNIT_ACTIVE
] = "OnUnitActive",
441 [TIMER_UNIT_INACTIVE
] = "OnUnitInactive"
444 DEFINE_STRING_TABLE_LOOKUP(timer_base
, TimerBase
);
446 const UnitVTable timer_vtable
= {
453 .coldplug
= timer_coldplug
,
457 .start
= timer_start
,
460 .serialize
= timer_serialize
,
461 .deserialize_item
= timer_deserialize_item
,
463 .active_state
= timer_active_state
,
464 .sub_state_to_string
= timer_sub_state_to_string
,
466 .timer_event
= timer_timer_event
,
468 .bus_message_handler
= bus_timer_message_handler