-/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
#include <errno.h>
#include "unit.h"
+#include "unit-name.h"
#include "timer.h"
+#include "dbus-timer.h"
+#include "special.h"
+#include "bus-errors.h"
+
+static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = {
+ [TIMER_DEAD] = UNIT_INACTIVE,
+ [TIMER_WAITING] = UNIT_ACTIVE,
+ [TIMER_RUNNING] = UNIT_ACTIVE,
+ [TIMER_ELAPSED] = UNIT_ACTIVE,
+ [TIMER_FAILED] = UNIT_FAILED
+};
+
+static void timer_init(Unit *u) {
+ Timer *t = TIMER(u);
+
+ assert(u);
+ assert(u->meta.load_state == UNIT_STUB);
+
+ t->next_elapse = (usec_t) -1;
+}
static void timer_done(Unit *u) {
Timer *t = TIMER(u);
+ TimerValue *v;
+
+ assert(t);
+
+ while ((v = t->values)) {
+ LIST_REMOVE(TimerValue, value, t->values, v);
+ free(v);
+ }
+
+ unit_unwatch_timer(u, &t->timer_watch);
+}
+
+static int timer_verify(Timer *t) {
+ assert(t);
+
+ if (t->meta.load_state != UNIT_LOADED)
+ return 0;
+
+ if (!t->values) {
+ log_error("%s lacks value setting. Refusing.", t->meta.id);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int timer_add_default_dependencies(Timer *t) {
+ int r;
+
+ assert(t);
+
+ if (t->meta.manager->running_as == MANAGER_SYSTEM)
+ if ((r = unit_add_two_dependencies_by_name(UNIT(t), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
+ return r;
+
+ return unit_add_two_dependencies_by_name(UNIT(t), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_SHUTDOWN_TARGET, NULL, true);
+}
+
+static int timer_load(Unit *u) {
+ Timer *t = TIMER(u);
+ int r;
+
+ assert(u);
+ assert(u->meta.load_state == UNIT_STUB);
+
+ if ((r = unit_load_fragment_and_dropin(u)) < 0)
+ return r;
+
+ if (u->meta.load_state == UNIT_LOADED) {
+
+ if (!t->unit)
+ if ((r = unit_load_related_unit(u, ".service", &t->unit)))
+ return r;
+
+ if ((r = unit_add_dependency(u, UNIT_BEFORE, t->unit, true)) < 0)
+ return r;
+
+ if (t->meta.default_dependencies)
+ if ((r = timer_add_default_dependencies(t)) < 0)
+ return r;
+ }
+
+ return timer_verify(t);
+}
+
+static void timer_dump(Unit *u, FILE *f, const char *prefix) {
+ Timer *t = TIMER(u);
+ TimerValue *v;
+ char
+ timespan1[FORMAT_TIMESPAN_MAX];
+
+ fprintf(f,
+ "%sTimer State: %s\n"
+ "%sUnit: %s\n",
+ prefix, timer_state_to_string(t->state),
+ prefix, t->unit->meta.id);
+
+ LIST_FOREACH(value, v, t->values)
+ fprintf(f,
+ "%s%s: %s\n",
+ prefix,
+ timer_base_to_string(v->base),
+ strna(format_timespan(timespan1, sizeof(timespan1), v->value)));
+}
+
+static void timer_set_state(Timer *t, TimerState state) {
+ TimerState old_state;
+ assert(t);
+
+ old_state = t->state;
+ t->state = state;
+
+ if (state != TIMER_WAITING)
+ unit_unwatch_timer(UNIT(t), &t->timer_watch);
+
+ if (state != old_state)
+ log_debug("%s changed %s -> %s",
+ t->meta.id,
+ timer_state_to_string(old_state),
+ timer_state_to_string(state));
+
+ unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state]);
+}
+
+static void timer_enter_waiting(Timer *t, bool initial);
+
+static int timer_coldplug(Unit *u) {
+ Timer *t = TIMER(u);
assert(t);
+ assert(t->state == TIMER_DEAD);
+
+ if (t->deserialized_state != t->state) {
+
+ if (t->deserialized_state == TIMER_WAITING)
+ timer_enter_waiting(t, false);
+ else
+ timer_set_state(t, t->deserialized_state);
+ }
+
+ return 0;
+}
+
+static void timer_enter_dead(Timer *t, bool success) {
+ assert(t);
+
+ if (!success)
+ t->failure = true;
+
+ timer_set_state(t, t->failure ? TIMER_FAILED : TIMER_DEAD);
+}
+
+static void timer_enter_waiting(Timer *t, bool initial) {
+ TimerValue *v;
+ usec_t base = 0, delay, n;
+ bool found = false;
+ int r;
+
+ n = now(CLOCK_MONOTONIC);
+
+ LIST_FOREACH(value, v, t->values) {
+
+ if (v->disabled)
+ continue;
+
+ switch (v->base) {
+
+ case TIMER_ACTIVE:
+ if (state_translation_table[t->state] == UNIT_ACTIVE)
+ base = t->meta.inactive_exit_timestamp.monotonic;
+ else
+ base = n;
+ break;
+
+ case TIMER_BOOT:
+ /* CLOCK_MONOTONIC equals the uptime on Linux */
+ base = 0;
+ break;
+
+ case TIMER_STARTUP:
+ base = t->meta.manager->startup_timestamp.monotonic;
+ break;
+
+ case TIMER_UNIT_ACTIVE:
+
+ if (t->unit->meta.inactive_exit_timestamp.monotonic <= 0)
+ continue;
+
+ base = t->unit->meta.inactive_exit_timestamp.monotonic;
+ break;
+
+ case TIMER_UNIT_INACTIVE:
+
+ if (t->unit->meta.inactive_enter_timestamp.monotonic <= 0)
+ continue;
+
+ base = t->unit->meta.inactive_enter_timestamp.monotonic;
+ break;
+
+ default:
+ assert_not_reached("Unknown timer base");
+ }
+
+ v->next_elapse = base + v->value;
+
+ if (!initial && v->next_elapse < n) {
+ v->disabled = true;
+ continue;
+ }
+
+ if (!found)
+ t->next_elapse = v->next_elapse;
+ else
+ t->next_elapse = MIN(t->next_elapse, v->next_elapse);
+
+ found = true;
+ }
+
+ if (!found) {
+ timer_set_state(t, TIMER_ELAPSED);
+ return;
+ }
+
+ delay = n < t->next_elapse ? t->next_elapse - n : 0;
+
+ if ((r = unit_watch_timer(UNIT(t), delay, &t->timer_watch)) < 0)
+ goto fail;
+
+ timer_set_state(t, TIMER_WAITING);
+ return;
+
+fail:
+ log_warning("%s failed to enter waiting state: %s", t->meta.id, strerror(-r));
+ timer_enter_dead(t, false);
+}
+
+static void timer_enter_running(Timer *t) {
+ DBusError error;
+ int r;
+
+ assert(t);
+ dbus_error_init(&error);
+
+ /* Don't start job if we are supposed to go down */
+ if (t->meta.job && t->meta.job->type == JOB_STOP)
+ return;
+
+ if ((r = manager_add_job(t->meta.manager, JOB_START, t->unit, JOB_REPLACE, true, &error, NULL)) < 0)
+ goto fail;
+
+ timer_set_state(t, TIMER_RUNNING);
+ return;
+
+fail:
+ log_warning("%s failed to queue unit startup job: %s", t->meta.id, bus_error(&error, r));
+ timer_enter_dead(t, false);
+
+ dbus_error_free(&error);
+}
+
+static int timer_start(Unit *u) {
+ Timer *t = TIMER(u);
+
+ assert(t);
+ assert(t->state == TIMER_DEAD || t->state == TIMER_FAILED);
+
+ if (t->unit->meta.load_state != UNIT_LOADED)
+ return -ENOENT;
+
+ t->failure = false;
+ timer_enter_waiting(t, true);
+ return 0;
+}
+
+static int timer_stop(Unit *u) {
+ Timer *t = TIMER(u);
+
+ assert(t);
+ assert(t->state == TIMER_WAITING || t->state == TIMER_RUNNING || t->state == TIMER_ELAPSED);
+
+ timer_enter_dead(t, true);
+ return 0;
+}
+
+static int timer_serialize(Unit *u, FILE *f, FDSet *fds) {
+ Timer *t = TIMER(u);
+
+ assert(u);
+ assert(f);
+ assert(fds);
+
+ unit_serialize_item(u, f, "state", timer_state_to_string(t->state));
+
+ return 0;
+}
+
+static int timer_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
+ Timer *t = TIMER(u);
+
+ assert(u);
+ assert(key);
+ assert(value);
+ assert(fds);
+
+ if (streq(key, "state")) {
+ TimerState state;
+
+ if ((state = timer_state_from_string(value)) < 0)
+ log_debug("Failed to parse state value %s", value);
+ else
+ t->deserialized_state = state;
+ } else
+ log_debug("Unknown serialization key '%s'", key);
+
+ return 0;
}
static UnitActiveState timer_active_state(Unit *u) {
+ assert(u);
+
+ return state_translation_table[TIMER(u)->state];
+}
+
+static const char *timer_sub_state_to_string(Unit *u) {
+ assert(u);
+
+ return timer_state_to_string(TIMER(u)->state);
+}
+
+static void timer_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
+ Timer *t = TIMER(u);
+
+ assert(t);
+ assert(elapsed == 1);
- static const UnitActiveState table[_TIMER_STATE_MAX] = {
- [TIMER_DEAD] = UNIT_INACTIVE,
- [TIMER_WAITING] = UNIT_ACTIVE,
- [TIMER_RUNNING] = UNIT_ACTIVE
- };
+ if (t->state != TIMER_WAITING)
+ return;
- return table[TIMER(u)->state];
+ log_debug("Timer elapsed on %s", u->meta.id);
+ timer_enter_running(t);
}
+void timer_unit_notify(Unit *u, UnitActiveState new_state) {
+ char *n;
+ int r;
+ Iterator i;
+
+ if (u->meta.type == UNIT_TIMER)
+ return;
+
+ SET_FOREACH(n, u->meta.names, i) {
+ char *k;
+ Unit *p;
+ Timer *t;
+ TimerValue *v;
+
+ if (!(k = unit_name_change_suffix(n, ".timer"))) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ p = manager_get_unit(u->meta.manager, k);
+ free(k);
+
+ if (!p)
+ continue;
+
+ if (p->meta.load_state != UNIT_LOADED)
+ continue;
+
+ t = TIMER(p);
+
+ if (t->unit != u)
+ continue;
+
+ /* Reenable all timers that depend on unit state */
+ LIST_FOREACH(value, v, t->values)
+ if (v->base == TIMER_UNIT_ACTIVE ||
+ v->base == TIMER_UNIT_INACTIVE)
+ v->disabled = false;
+
+ switch (t->state) {
+
+ case TIMER_WAITING:
+ case TIMER_ELAPSED:
+
+ /* Recalculate sleep time */
+ timer_enter_waiting(t, false);
+ break;
+
+ case TIMER_RUNNING:
+
+ if (UNIT_IS_INACTIVE_OR_FAILED(new_state)) {
+ log_debug("%s got notified about unit deactivation.", t->meta.id);
+ timer_enter_waiting(t, false);
+ }
+
+ break;
+
+ case TIMER_DEAD:
+ case TIMER_FAILED:
+ break;
+
+ default:
+ assert_not_reached("Unknown timer state");
+ }
+ }
+
+ return;
+
+fail:
+ log_error("Failed find timer unit: %s", strerror(-r));
+}
+
+static void timer_reset_failed(Unit *u) {
+ Timer *t = TIMER(u);
+
+ assert(t);
+
+ if (t->state == TIMER_FAILED)
+ timer_set_state(t, TIMER_DEAD);
+
+ t->failure = false;
+}
+
+static const char* const timer_state_table[_TIMER_STATE_MAX] = {
+ [TIMER_DEAD] = "dead",
+ [TIMER_WAITING] = "waiting",
+ [TIMER_RUNNING] = "running",
+ [TIMER_ELAPSED] = "elapsed",
+ [TIMER_FAILED] = "failed"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(timer_state, TimerState);
+
+static const char* const timer_base_table[_TIMER_BASE_MAX] = {
+ [TIMER_ACTIVE] = "OnActiveSec",
+ [TIMER_BOOT] = "OnBootSec",
+ [TIMER_STARTUP] = "OnStartupSec",
+ [TIMER_UNIT_ACTIVE] = "OnUnitActiveSec",
+ [TIMER_UNIT_INACTIVE] = "OnUnitInactiveSec"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(timer_base, TimerBase);
+
const UnitVTable timer_vtable = {
.suffix = ".timer",
- .load = unit_load_fragment_and_dropin,
+ .init = timer_init,
.done = timer_done,
+ .load = timer_load,
+
+ .coldplug = timer_coldplug,
+
+ .dump = timer_dump,
+
+ .start = timer_start,
+ .stop = timer_stop,
+
+ .serialize = timer_serialize,
+ .deserialize_item = timer_deserialize_item,
+
+ .active_state = timer_active_state,
+ .sub_state_to_string = timer_sub_state_to_string,
+
+ .timer_event = timer_timer_event,
+
+ .reset_failed = timer_reset_failed,
- .active_state = timer_active_state
+ .bus_interface = "org.freedesktop.systemd1.Timer",
+ .bus_message_handler = bus_timer_message_handler,
+ .bus_invalidating_properties = bus_timer_invalidating_properties
};
~ianmdlvl / elogind.git / blobdiff