X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Ftimer.c;h=5bc01a26ff796d23ce7e65514c5e3abafa72af5b;hp=e318fee2010eb927f32d538fa6bd872221bd265a;hb=718db96199eb307751264e4163555662c9a389fa;hpb=b30e2f4c18ad81b04e4314fd191a5d458553773c diff --git a/src/core/timer.c b/src/core/timer.c index e318fee20..5bc01a26f 100644 --- a/src/core/timer.c +++ b/src/core/timer.c @@ -6,16 +6,16 @@ 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 + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 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. + Lesser General Public License for more details. - You should have received a copy of the GNU General Public License + You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see . ***/ @@ -26,7 +26,8 @@ #include "timer.h" #include "dbus-timer.h" #include "special.h" -#include "bus-errors.h" +#include "bus-util.h" +#include "bus-error.h" static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = { [TIMER_DEAD] = UNIT_INACTIVE, @@ -36,29 +37,42 @@ static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = { [TIMER_FAILED] = UNIT_FAILED }; +static int timer_dispatch(sd_event_source *s, uint64_t usec, void *userdata); + static void timer_init(Unit *u) { Timer *t = TIMER(u); assert(u); assert(u->load_state == UNIT_STUB); - t->next_elapse = (usec_t) -1; + t->next_elapse_monotonic = (usec_t) -1; + t->next_elapse_realtime = (usec_t) -1; } -static void timer_done(Unit *u) { - Timer *t = TIMER(u); +void timer_free_values(Timer *t) { TimerValue *v; assert(t); while ((v = t->values)) { - LIST_REMOVE(TimerValue, value, t->values, v); + LIST_REMOVE(value, t->values, v); + + if (v->calendar_spec) + calendar_spec_free(v->calendar_spec); + free(v); } +} - unit_unwatch_timer(u, &t->timer_watch); +static void timer_done(Unit *u) { + Timer *t = TIMER(u); + + assert(t); - unit_ref_unset(&t->unit); + timer_free_values(t); + + t->monotonic_event_source = sd_event_source_unref(t->monotonic_event_source); + t->realtime_event_source = sd_event_source_unref(t->realtime_event_source); } static int timer_verify(Timer *t) { @@ -68,7 +82,8 @@ static int timer_verify(Timer *t) { return 0; if (!t->values) { - log_error("%s lacks value setting. Refusing.", UNIT(t)->id); + log_error_unit(UNIT(t)->id, + "%s lacks value setting. Refusing.", UNIT(t)->id); return -EINVAL; } @@ -80,11 +95,13 @@ static int timer_add_default_dependencies(Timer *t) { 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; + r = unit_add_dependency_by_name(UNIT(t), UNIT_BEFORE, SPECIAL_TIMERS_TARGET, NULL, true); + if (r < 0) + return r; - if ((r = unit_add_two_dependencies_by_name(UNIT(t), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0) + if (UNIT(t)->manager->running_as == SYSTEMD_SYSTEM) { + r = unit_add_two_dependencies_by_name(UNIT(t), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true); + if (r < 0) return r; } @@ -98,28 +115,29 @@ static int timer_load(Unit *u) { assert(u); assert(u->load_state == UNIT_STUB); - if ((r = unit_load_fragment_and_dropin(u)) < 0) + r = unit_load_fragment_and_dropin(u); + if (r < 0) return r; if (u->load_state == UNIT_LOADED) { - if (!UNIT_DEREF(t->unit)) { + if (set_isempty(u->dependencies[UNIT_TRIGGERS])) { 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, x, true); + if (r < 0) + return r; } - 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) + if (UNIT(t)->default_dependencies) { + r = timer_add_default_dependencies(t); + if (r < 0) return r; + } } return timer_verify(t); @@ -127,9 +145,10 @@ static int timer_load(Unit *u) { static void timer_dump(Unit *u, FILE *f, const char *prefix) { Timer *t = TIMER(u); + Unit *trigger; TimerValue *v; - char - timespan1[FORMAT_TIMESPAN_MAX]; + + trigger = UNIT_TRIGGER(u); fprintf(f, "%sTimer State: %s\n" @@ -137,14 +156,30 @@ static void timer_dump(Unit *u, FILE *f, const char *prefix) { "%sUnit: %s\n", prefix, timer_state_to_string(t->state), prefix, timer_result_to_string(t->result), - prefix, UNIT_DEREF(t->unit)->id); + prefix, trigger ? trigger->id : "n/a"); - 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))); + LIST_FOREACH(value, v, t->values) { + + if (v->base == TIMER_CALENDAR) { + _cleanup_free_ char *p = NULL; + + calendar_spec_to_string(v->calendar_spec, &p); + + fprintf(f, + "%s%s: %s\n", + prefix, + timer_base_to_string(v->base), + strna(p)); + } else { + char timespan1[FORMAT_TIMESPAN_MAX]; + + fprintf(f, + "%s%s: %s\n", + prefix, + timer_base_to_string(v->base), + strna(format_timespan(timespan1, sizeof(timespan1), v->value, 0))); + } + } } static void timer_set_state(Timer *t, TimerState state) { @@ -154,14 +189,16 @@ static void timer_set_state(Timer *t, TimerState state) { old_state = t->state; t->state = state; - if (state != TIMER_WAITING) - unit_unwatch_timer(UNIT(t), &t->timer_watch); + if (state != TIMER_WAITING) { + t->monotonic_event_source = sd_event_source_unref(t->monotonic_event_source); + t->realtime_event_source = sd_event_source_unref(t->realtime_event_source); + } if (state != old_state) - log_debug("%s changed %s -> %s", - UNIT(t)->id, - timer_state_to_string(old_state), - timer_state_to_string(state)); + log_debug_unit(UNIT(t)->id, + "%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); } @@ -194,112 +231,194 @@ static void timer_enter_dead(Timer *t, TimerResult 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; + usec_t base = 0; + dual_timestamp ts; + bool found_monotonic = false, found_realtime = false; int r; - n = now(CLOCK_MONOTONIC); + dual_timestamp_get(&ts); + t->next_elapse_monotonic = t->next_elapse_realtime = 0; LIST_FOREACH(value, v, t->values) { if (v->disabled) continue; - switch (v->base) { + if (v->base == TIMER_CALENDAR) { - case TIMER_ACTIVE: - if (state_translation_table[t->state] == UNIT_ACTIVE) - base = UNIT(t)->inactive_exit_timestamp.monotonic; + r = calendar_spec_next_usec(v->calendar_spec, ts.realtime, &v->next_elapse); + if (r < 0) + continue; + + if (!found_realtime) + t->next_elapse_realtime = v->next_elapse; else - base = n; - break; + t->next_elapse_realtime = MIN(t->next_elapse_realtime, v->next_elapse); - case TIMER_BOOT: - /* CLOCK_MONOTONIC equals the uptime on Linux */ - base = 0; - break; + found_realtime = true; - case TIMER_STARTUP: - base = UNIT(t)->manager->startup_timestamp.monotonic; - break; + } else { + switch (v->base) { - case TIMER_UNIT_ACTIVE: + case TIMER_ACTIVE: + if (state_translation_table[t->state] == UNIT_ACTIVE) + base = UNIT(t)->inactive_exit_timestamp.monotonic; + else + base = ts.monotonic; + break; - if (UNIT_DEREF(t->unit)->inactive_exit_timestamp.monotonic <= 0) - continue; + case TIMER_BOOT: + /* CLOCK_MONOTONIC equals the uptime on Linux */ + base = 0; + break; - base = UNIT_DEREF(t->unit)->inactive_exit_timestamp.monotonic; - break; + case TIMER_STARTUP: + base = UNIT(t)->manager->userspace_timestamp.monotonic; + break; - case TIMER_UNIT_INACTIVE: + case TIMER_UNIT_ACTIVE: - if (UNIT_DEREF(t->unit)->inactive_enter_timestamp.monotonic <= 0) - continue; + base = UNIT_TRIGGER(UNIT(t))->inactive_exit_timestamp.monotonic; - base = UNIT_DEREF(t->unit)->inactive_enter_timestamp.monotonic; - break; + if (base <= 0) + base = t->last_trigger_monotonic; - default: - assert_not_reached("Unknown timer base"); - } + if (base <= 0) + continue; - v->next_elapse = base + v->value; + break; - if (!initial && v->next_elapse < n) { - v->disabled = true; - continue; - } + case TIMER_UNIT_INACTIVE: - if (!found) - t->next_elapse = v->next_elapse; - else - t->next_elapse = MIN(t->next_elapse, v->next_elapse); + base = UNIT_TRIGGER(UNIT(t))->inactive_enter_timestamp.monotonic; + + if (base <= 0) + base = t->last_trigger_monotonic; + + if (base <= 0) + continue; + + break; + + default: + assert_not_reached("Unknown timer base"); + } + + v->next_elapse = base + v->value; + + if (!initial && + v->next_elapse < ts.monotonic && + (v->base == TIMER_ACTIVE || v->base == TIMER_BOOT || v->base == TIMER_STARTUP)) { + /* This is a one time trigger, disable it now */ + v->disabled = true; + continue; + } + + if (!found_monotonic) + t->next_elapse_monotonic = v->next_elapse; + else + t->next_elapse_monotonic = MIN(t->next_elapse_monotonic, v->next_elapse); - found = true; + found_monotonic = true; + } } - if (!found) { + if (!found_monotonic && !found_realtime) { + log_debug_unit(UNIT(t)->id, "%s: Timer is elapsed.", UNIT(t)->id); timer_set_state(t, TIMER_ELAPSED); return; } - delay = n < t->next_elapse ? t->next_elapse - n : 0; + if (found_monotonic) { + char buf[FORMAT_TIMESPAN_MAX]; + log_debug_unit(UNIT(t)->id, + "%s: Monotonic timer elapses in %s.", + UNIT(t)->id, + format_timespan(buf, sizeof(buf), t->next_elapse_monotonic > ts.monotonic ? t->next_elapse_monotonic - ts.monotonic : 0, 0)); - if ((r = unit_watch_timer(UNIT(t), delay, &t->timer_watch)) < 0) - goto fail; + if (t->monotonic_event_source) { + r = sd_event_source_set_time(t->monotonic_event_source, t->next_elapse_monotonic); + if (r < 0) + goto fail; + + r = sd_event_source_set_enabled(t->monotonic_event_source, SD_EVENT_ONESHOT); + } else + r = sd_event_add_monotonic(UNIT(t)->manager->event, t->next_elapse_monotonic, 0, timer_dispatch, t, &t->monotonic_event_source); + + if (r < 0) + goto fail; + + } else if (t->monotonic_event_source) { + r = sd_event_source_set_enabled(t->monotonic_event_source, SD_EVENT_OFF); + + if (r < 0) + goto fail; + } + + if (found_realtime) { + char buf[FORMAT_TIMESTAMP_MAX]; + log_debug_unit(UNIT(t)->id, + "%s: Realtime timer elapses at %s.", + UNIT(t)->id, + format_timestamp(buf, sizeof(buf), t->next_elapse_realtime)); + + if (t->realtime_event_source) { + r = sd_event_source_set_time(t->realtime_event_source, t->next_elapse_realtime); + if (r < 0) + goto fail; + + r = sd_event_source_set_enabled(t->realtime_event_source, SD_EVENT_ONESHOT); + } else + r = sd_event_add_realtime(UNIT(t)->manager->event, t->next_elapse_realtime, 0, timer_dispatch, t, &t->realtime_event_source); + + if (r < 0) + goto fail; + + } else if (t->realtime_event_source) { + r = sd_event_source_set_enabled(t->realtime_event_source, SD_EVENT_OFF); + + if (r < 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)); + log_warning_unit(UNIT(t)->id, + "%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; + _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; 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) + if (unit_stop_pending(UNIT(t))) return; - if ((r = manager_add_job(UNIT(t)->manager, JOB_START, UNIT_DEREF(t->unit), JOB_REPLACE, true, &error, NULL)) < 0) + r = manager_add_job(UNIT(t)->manager, JOB_START, UNIT_TRIGGER(UNIT(t)), + JOB_REPLACE, true, &error, NULL); + if (r < 0) goto fail; + t->last_trigger_monotonic = now(CLOCK_MONOTONIC); + 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)); + log_warning_unit(UNIT(t)->id, + "%s failed to queue unit startup job: %s", + UNIT(t)->id, bus_error_message(&error, r)); timer_enter_dead(t, TIMER_FAILURE_RESOURCES); - - dbus_error_free(&error); } static int timer_start(Unit *u) { @@ -308,7 +427,7 @@ static int timer_start(Unit *u) { assert(t); assert(t->state == TIMER_DEAD || t->state == TIMER_FAILED); - if (UNIT_DEREF(t->unit)->load_state != UNIT_LOADED) + if (UNIT_TRIGGER(u)->load_state != UNIT_LOADED) return -ENOENT; t->result = TIMER_SUCCESS; @@ -350,8 +469,9 @@ static int timer_deserialize_item(Unit *u, const char *key, const char *value, F if (streq(key, "state")) { TimerState state; - if ((state = timer_state_from_string(value)) < 0) - log_debug("Failed to parse state value %s", value); + state = timer_state_from_string(value); + if (state < 0) + log_debug_unit(u->id, "Failed to parse state value %s", value); else t->deserialized_state = state; } else if (streq(key, "result")) { @@ -359,91 +479,82 @@ static int timer_deserialize_item(Unit *u, const char *key, const char *value, F f = timer_result_from_string(value); if (f < 0) - log_debug("Failed to parse result value %s", value); + log_debug_unit(u->id, "Failed to parse result value %s", value); else if (f != TIMER_SUCCESS) t->result = f; } else - log_debug("Unknown serialization key '%s'", key); + log_debug_unit(u->id, "Unknown serialization key '%s'", key); return 0; } -static UnitActiveState timer_active_state(Unit *u) { +_pure_ 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) { +_pure_ 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); +static int timer_dispatch(sd_event_source *s, uint64_t usec, void *userdata) { + Timer *t = TIMER(userdata); assert(t); - assert(elapsed == 1); if (t->state != TIMER_WAITING) - return; + return 0; - log_debug("Timer elapsed on %s", u->id); + log_debug_unit(UNIT(t)->id, "Timer elapsed on %s", UNIT(t)->id); timer_enter_running(t); + return 0; } -void timer_unit_notify(Unit *u, UnitActiveState new_state) { - Iterator i; - Unit *k; - - if (u->type == UNIT_TIMER) - return; +static void timer_trigger_notify(Unit *u, Unit *other) { + Timer *t = TIMER(u); + TimerValue *v; - SET_FOREACH(k, u->dependencies[UNIT_TRIGGERED_BY], i) { - Timer *t; - TimerValue *v; + assert(u); + assert(other); - if (k->type != UNIT_TIMER) - continue; + if (other->load_state != UNIT_LOADED) + return; - if (k->load_state != UNIT_LOADED) - 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; - t = TIMER(k); + switch (t->state) { - /* 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; + case TIMER_WAITING: + case TIMER_ELAPSED: - switch (t->state) { + /* Recalculate sleep time */ + timer_enter_waiting(t, false); + break; - case TIMER_WAITING: - case TIMER_ELAPSED: + case TIMER_RUNNING: - /* Recalculate sleep time */ + if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) { + log_debug_unit(UNIT(t)->id, + "%s got notified about unit deactivation.", + UNIT(t)->id); 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; + } + break; - case TIMER_DEAD: - case TIMER_FAILED: - break; + case TIMER_DEAD: + case TIMER_FAILED: + break; - default: - assert_not_reached("Unknown timer state"); - } + default: + assert_not_reached("Unknown timer state"); } } @@ -458,6 +569,19 @@ static void timer_reset_failed(Unit *u) { t->result = TIMER_SUCCESS; } +static void timer_time_change(Unit *u) { + Timer *t = TIMER(u); + + assert(u); + + if (t->state != TIMER_WAITING) + return; + + log_debug_unit(u->id, + "%s: time change, recalculating next elapse.", u->id); + timer_enter_waiting(t, false); +} + static const char* const timer_state_table[_TIMER_STATE_MAX] = { [TIMER_DEAD] = "dead", [TIMER_WAITING] = "waiting", @@ -473,7 +597,8 @@ static const char* const timer_base_table[_TIMER_BASE_MAX] = { [TIMER_BOOT] = "OnBootSec", [TIMER_STARTUP] = "OnStartupSec", [TIMER_UNIT_ACTIVE] = "OnUnitActiveSec", - [TIMER_UNIT_INACTIVE] = "OnUnitInactiveSec" + [TIMER_UNIT_INACTIVE] = "OnUnitInactiveSec", + [TIMER_CALENDAR] = "OnCalendar" }; DEFINE_STRING_TABLE_LOOKUP(timer_base, TimerBase); @@ -486,8 +611,8 @@ static const char* const timer_result_table[_TIMER_RESULT_MAX] = { DEFINE_STRING_TABLE_LOOKUP(timer_result, TimerResult); const UnitVTable timer_vtable = { - .suffix = ".timer", .object_size = sizeof(Timer), + .sections = "Unit\0" "Timer\0" @@ -510,11 +635,12 @@ const UnitVTable timer_vtable = { .active_state = timer_active_state, .sub_state_to_string = timer_sub_state_to_string, - .timer_event = timer_timer_event, + .trigger_notify = timer_trigger_notify, .reset_failed = timer_reset_failed, + .time_change = timer_time_change, .bus_interface = "org.freedesktop.systemd1.Timer", - .bus_message_handler = bus_timer_message_handler, - .bus_invalidating_properties = bus_timer_invalidating_properties + .bus_vtable = bus_timer_vtable, + .bus_changing_properties = bus_timer_changing_properties, };