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 #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_MAINTENANCE
] = UNIT_MAINTENANCE
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_load(Unit
*u
) {
81 assert(u
->meta
.load_state
== UNIT_STUB
);
83 if ((r
= unit_load_fragment_and_dropin(u
)) < 0)
86 if (u
->meta
.load_state
== UNIT_LOADED
) {
89 if ((r
= unit_load_related_unit(u
, ".service", &t
->unit
)))
92 if ((r
= unit_add_dependency(u
, UNIT_BEFORE
, t
->unit
, true)) < 0)
95 /* Timers shouldn't stay around on shutdown */
96 if (t
->meta
.default_dependencies
)
97 if ((r
= unit_add_two_dependencies_by_name(u
, UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, NULL
, true)) < 0)
101 return timer_verify(t
);
104 static void timer_dump(Unit
*u
, FILE *f
, const char *prefix
) {
110 timespan1
[FORMAT_TIMESPAN_MAX
];
112 p2
= strappend(prefix
, "\t");
113 prefix2
= p2
? p2
: prefix
;
116 "%sTimer State: %s\n"
118 prefix
, timer_state_to_string(t
->state
),
119 prefix
, t
->unit
->meta
.id
);
121 LIST_FOREACH(value
, v
, t
->values
)
125 timer_base_to_string(v
->base
),
126 strna(format_timespan(timespan1
, sizeof(timespan1
), v
->value
)));
131 static void timer_set_state(Timer
*t
, TimerState state
) {
132 TimerState old_state
;
135 old_state
= t
->state
;
138 if (state
!= TIMER_WAITING
)
139 unit_unwatch_timer(UNIT(t
), &t
->timer_watch
);
141 if (state
!= old_state
)
142 log_debug("%s changed %s -> %s",
144 timer_state_to_string(old_state
),
145 timer_state_to_string(state
));
147 unit_notify(UNIT(t
), state_translation_table
[old_state
], state_translation_table
[state
]);
150 static void timer_enter_waiting(Timer
*t
, bool initial
);
152 static int timer_coldplug(Unit
*u
) {
156 assert(t
->state
== TIMER_DEAD
);
158 if (t
->deserialized_state
!= t
->state
) {
160 if (t
->deserialized_state
== TIMER_WAITING
||
161 t
->deserialized_state
== TIMER_RUNNING
||
162 t
->deserialized_state
== TIMER_ELAPSED
)
163 timer_enter_waiting(t
, false);
165 timer_set_state(t
, t
->deserialized_state
);
171 static void timer_enter_dead(Timer
*t
, bool success
) {
177 timer_set_state(t
, t
->failure
? TIMER_MAINTENANCE
: TIMER_DEAD
);
180 static void timer_enter_waiting(Timer
*t
, bool initial
) {
182 usec_t base
= 0, delay
, n
;
186 n
= now(CLOCK_MONOTONIC
);
188 LIST_FOREACH(value
, v
, t
->values
) {
196 if (state_translation_table
[t
->state
] == UNIT_ACTIVE
) {
197 base
= t
->meta
.inactive_exit_timestamp
.monotonic
;
203 /* CLOCK_MONOTONIC equals the uptime on Linux */
208 base
= t
->meta
.manager
->startup_timestamp
.monotonic
;
211 case TIMER_UNIT_ACTIVE
:
213 if (t
->unit
->meta
.inactive_exit_timestamp
.monotonic
<= 0)
216 base
= t
->unit
->meta
.inactive_exit_timestamp
.monotonic
;
219 case TIMER_UNIT_INACTIVE
:
221 if (t
->unit
->meta
.inactive_enter_timestamp
.monotonic
<= 0)
224 base
= t
->unit
->meta
.inactive_enter_timestamp
.monotonic
;
228 assert_not_reached("Unknown timer base");
231 v
->next_elapse
= base
+ v
->value
;
233 if (!initial
&& v
->next_elapse
< n
) {
239 t
->next_elapse
= v
->next_elapse
;
241 t
->next_elapse
= MIN(t
->next_elapse
, v
->next_elapse
);
247 timer_set_state(t
, TIMER_ELAPSED
);
251 delay
= n
< t
->next_elapse
? t
->next_elapse
- n
: 0;
253 if ((r
= unit_watch_timer(UNIT(t
), delay
, &t
->timer_watch
)) < 0)
256 timer_set_state(t
, TIMER_WAITING
);
260 log_warning("%s failed to enter waiting state: %s", t
->meta
.id
, strerror(-r
));
261 timer_enter_dead(t
, false);
264 static void timer_enter_running(Timer
*t
) {
269 dbus_error_init(&error
);
271 if ((r
= manager_add_job(t
->meta
.manager
, JOB_START
, t
->unit
, JOB_REPLACE
, true, &error
, NULL
)) < 0)
274 timer_set_state(t
, TIMER_RUNNING
);
278 log_warning("%s failed to queue unit startup job: %s", t
->meta
.id
, bus_error(&error
, r
));
279 timer_enter_dead(t
, false);
281 dbus_error_free(&error
);
284 static int timer_start(Unit
*u
) {
288 assert(t
->state
== TIMER_DEAD
|| t
->state
== TIMER_MAINTENANCE
);
290 if (t
->unit
->meta
.load_state
!= UNIT_LOADED
)
294 timer_enter_waiting(t
, true);
298 static int timer_stop(Unit
*u
) {
302 assert(t
->state
== TIMER_WAITING
|| t
->state
== TIMER_RUNNING
|| t
->state
== TIMER_ELAPSED
);
304 timer_enter_dead(t
, true);
308 static int timer_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
315 unit_serialize_item(u
, f
, "state", timer_state_to_string(t
->state
));
320 static int timer_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
328 if (streq(key
, "state")) {
331 if ((state
= timer_state_from_string(value
)) < 0)
332 log_debug("Failed to parse state value %s", value
);
334 t
->deserialized_state
= state
;
336 log_debug("Unknown serialization key '%s'", key
);
341 static UnitActiveState
timer_active_state(Unit
*u
) {
344 return state_translation_table
[TIMER(u
)->state
];
347 static const char *timer_sub_state_to_string(Unit
*u
) {
350 return timer_state_to_string(TIMER(u
)->state
);
353 static void timer_timer_event(Unit
*u
, uint64_t elapsed
, Watch
*w
) {
357 assert(elapsed
== 1);
359 if (t
->state
!= TIMER_WAITING
)
362 log_debug("Timer elapsed on %s", u
->meta
.id
);
363 timer_enter_running(t
);
366 void timer_unit_notify(Unit
*u
, UnitActiveState new_state
) {
371 if (u
->meta
.type
== UNIT_TIMER
)
374 SET_FOREACH(n
, u
->meta
.names
, i
) {
380 if (!(k
= unit_name_change_suffix(n
, ".timer"))) {
385 p
= manager_get_unit(u
->meta
.manager
, k
);
391 if (p
->meta
.load_state
!= UNIT_LOADED
)
399 /* Reenable all timers that depend on unit state */
400 LIST_FOREACH(value
, v
, t
->values
)
401 if (v
->base
== TIMER_UNIT_ACTIVE
||
402 v
->base
== TIMER_UNIT_INACTIVE
)
410 /* Recalculate sleep time */
411 timer_enter_waiting(t
, false);
416 if (UNIT_IS_INACTIVE_OR_MAINTENANCE(new_state
)) {
417 log_debug("%s got notified about unit deactivation.", t
->meta
.id
);
418 timer_enter_waiting(t
, false);
424 case TIMER_MAINTENANCE
:
428 assert_not_reached("Unknown timer state");
435 log_error("Failed find timer unit: %s", strerror(-r
));
438 static const char* const timer_state_table
[_TIMER_STATE_MAX
] = {
439 [TIMER_DEAD
] = "dead",
440 [TIMER_WAITING
] = "waiting",
441 [TIMER_RUNNING
] = "running",
442 [TIMER_ELAPSED
] = "elapsed",
443 [TIMER_MAINTENANCE
] = "maintenance"
446 DEFINE_STRING_TABLE_LOOKUP(timer_state
, TimerState
);
448 static const char* const timer_base_table
[_TIMER_BASE_MAX
] = {
449 [TIMER_ACTIVE
] = "OnActiveSec",
450 [TIMER_BOOT
] = "OnBootSec",
451 [TIMER_STARTUP
] = "OnStartupSec",
452 [TIMER_UNIT_ACTIVE
] = "OnUnitActiveSec",
453 [TIMER_UNIT_INACTIVE
] = "OnUnitInactiveSec"
456 DEFINE_STRING_TABLE_LOOKUP(timer_base
, TimerBase
);
458 const UnitVTable timer_vtable
= {
465 .coldplug
= timer_coldplug
,
469 .start
= timer_start
,
472 .serialize
= timer_serialize
,
473 .deserialize_item
= timer_deserialize_item
,
475 .active_state
= timer_active_state
,
476 .sub_state_to_string
= timer_sub_state_to_string
,
478 .timer_event
= timer_timer_event
,
480 .bus_message_handler
= bus_timer_message_handler