+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#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->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);
-
- unit_ref_unset(&t->unit);
-}
-
-static int timer_verify(Timer *t) {
- assert(t);
-
- if (UNIT(t)->load_state != UNIT_LOADED)
- return 0;
-
- if (!t->values) {
- log_error("%s lacks value setting. Refusing.", UNIT(t)->id);
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int timer_add_default_dependencies(Timer *t) {
- int r;
-
- assert(t);
-
- if (UNIT(t)->manager->running_as == MANAGER_SYSTEM) {
- if ((r = unit_add_dependency_by_name(UNIT(t), UNIT_BEFORE, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
- return r;
-
- 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_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
-}
-
-static int timer_load(Unit *u) {
- Timer *t = TIMER(u);
- int r;
-
- assert(u);
- assert(u->load_state == UNIT_STUB);
-
- if ((r = unit_load_fragment_and_dropin(u)) < 0)
- return r;
-
- if (u->load_state == UNIT_LOADED) {
-
- if (!UNIT_DEREF(t->unit)) {
- Unit *x;
-
- r = unit_load_related_unit(u, ".service", &x);
- if (r < 0)
- return r;
-
- unit_ref_set(&t->unit, x);
- }
-
- r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(t->unit), true);
- if (r < 0)
- return r;
-
- if (UNIT(t)->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"
- "%sResult: %s\n"
- "%sUnit: %s\n",
- prefix, timer_state_to_string(t->state),
- prefix, timer_result_to_string(t->result),
- prefix, UNIT_DEREF(t->unit)->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",
- UNIT(t)->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], true);
-}
-
-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, TimerResult f) {
- assert(t);
-
- if (f != TIMER_SUCCESS)
- t->result = f;
-
- timer_set_state(t, t->result != TIMER_SUCCESS ? 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 = UNIT(t)->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 = UNIT(t)->manager->startup_timestamp.monotonic;
- break;
-
- case TIMER_UNIT_ACTIVE:
-
- if (UNIT_DEREF(t->unit)->inactive_exit_timestamp.monotonic <= 0)
- continue;
-
- base = UNIT_DEREF(t->unit)->inactive_exit_timestamp.monotonic;
- break;
-
- case TIMER_UNIT_INACTIVE:
-
- if (UNIT_DEREF(t->unit)->inactive_enter_timestamp.monotonic <= 0)
- continue;
-
- base = UNIT_DEREF(t->unit)->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", UNIT(t)->id, strerror(-r));
- timer_enter_dead(t, TIMER_FAILURE_RESOURCES);
-}
-
-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 (UNIT(t)->job && UNIT(t)->job->type == JOB_STOP)
- return;
-
- if ((r = manager_add_job(UNIT(t)->manager, JOB_START, UNIT_DEREF(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", UNIT(t)->id, bus_error(&error, r));
- timer_enter_dead(t, TIMER_FAILURE_RESOURCES);
-
- 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 (UNIT_DEREF(t->unit)->load_state != UNIT_LOADED)
- return -ENOENT;
-
- t->result = TIMER_SUCCESS;
- 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, TIMER_SUCCESS);
- 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));
- unit_serialize_item(u, f, "result", timer_result_to_string(t->result));
-
- 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 if (streq(key, "result")) {
- TimerResult f;
-
- f = timer_result_from_string(value);
- if (f < 0)
- log_debug("Failed to parse result value %s", value);
- else if (f != TIMER_SUCCESS)
- t->result = f;
-
- } 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);
-
- if (t->state != TIMER_WAITING)
- return;
-
- log_debug("Timer elapsed on %s", u->id);
- timer_enter_running(t);
-}
-
-void timer_unit_notify(Unit *u, UnitActiveState new_state) {
- Iterator i;
- Unit *k;
-
- if (u->type == UNIT_TIMER)
- return;
-
- SET_FOREACH(k, u->dependencies[UNIT_TRIGGERED_BY], i) {
- Timer *t;
- TimerValue *v;
-
- if (k->type != UNIT_TIMER)
- continue;
-
- if (k->load_state != UNIT_LOADED)
- continue;
-
- t = TIMER(k);
-
- /* 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.", UNIT(t)->id);
- timer_enter_waiting(t, false);
- }
-
- break;
-
- case TIMER_DEAD:
- case TIMER_FAILED:
- break;
-
- default:
- assert_not_reached("Unknown timer state");
- }
- }
-}
-
-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->result = TIMER_SUCCESS;
-}
-
-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);
-
-static const char* const timer_result_table[_TIMER_RESULT_MAX] = {
- [TIMER_SUCCESS] = "success",
- [TIMER_FAILURE_RESOURCES] = "resources"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(timer_result, TimerResult);
-
-const UnitVTable timer_vtable = {
- .suffix = ".timer",
- .object_size = sizeof(Timer),
- .sections =
- "Unit\0"
- "Timer\0"
- "Install\0",
-
- .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,
-
- .bus_interface = "org.freedesktop.systemd1.Timer",
- .bus_message_handler = bus_timer_message_handler,
- .bus_invalidating_properties = bus_timer_invalidating_properties
-};
~ianmdlvl / elogind.git / blobdiff