From a483fb59a8dd908a3e4b20d62410d022d511eaa8 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Mon, 1 Feb 2016 16:01:25 +0100 Subject: core: store for each unit when the last low-level unit state change took place This adds a new timestamp field to the Unit struct, storing when the last low-level state change took place, and make sure this is restored after a daemon reload. This new field is useful to allow restarting of per-state timers exactly where they originally started. --- src/core/dbus-unit.c | 1 + src/core/unit.c | 32 ++++++++++++++++++++++++-------- src/core/unit.h | 4 ++++ 3 files changed, 29 insertions(+), 8 deletions(-) (limited to 'src') diff --git a/src/core/dbus-unit.c b/src/core/dbus-unit.c index dca9f77528..d7929e5566 100644 --- a/src/core/dbus-unit.c +++ b/src/core/dbus-unit.c @@ -674,6 +674,7 @@ const sd_bus_vtable bus_unit_vtable[] = { SD_BUS_PROPERTY("DropInPaths", "as", NULL, offsetof(Unit, dropin_paths), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("UnitFileState", "s", property_get_unit_file_state, 0, 0), SD_BUS_PROPERTY("UnitFilePreset", "s", property_get_unit_file_preset, 0, 0), + BUS_PROPERTY_DUAL_TIMESTAMP("StateChangeTimestamp", offsetof(Unit, state_change_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), BUS_PROPERTY_DUAL_TIMESTAMP("InactiveExitTimestamp", offsetof(Unit, inactive_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), BUS_PROPERTY_DUAL_TIMESTAMP("ActiveEnterTimestamp", offsetof(Unit, active_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), BUS_PROPERTY_DUAL_TIMESTAMP("ActiveExitTimestamp", offsetof(Unit, active_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), diff --git a/src/core/unit.c b/src/core/unit.c index b6fbf4e785..05466a84f9 100644 --- a/src/core/unit.c +++ b/src/core/unit.c @@ -869,6 +869,7 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) { Iterator i; const char *prefix2; char + timestamp0[FORMAT_TIMESTAMP_MAX], timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX], timestamp3[FORMAT_TIMESTAMP_MAX], @@ -890,6 +891,7 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) { "%s\tInstance: %s\n" "%s\tUnit Load State: %s\n" "%s\tUnit Active State: %s\n" + "%s\nState Change Timestamp: %s\n" "%s\tInactive Exit Timestamp: %s\n" "%s\tActive Enter Timestamp: %s\n" "%s\tActive Exit Timestamp: %s\n" @@ -907,6 +909,7 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) { prefix, strna(u->instance), prefix, unit_load_state_to_string(u->load_state), prefix, unit_active_state_to_string(unit_active_state(u)), + prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), @@ -1821,19 +1824,17 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su /* Update timestamps for state changes */ if (m->n_reloading <= 0) { - dual_timestamp ts; - - dual_timestamp_get(&ts); + dual_timestamp_get(&u->state_change_timestamp); if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) - u->inactive_exit_timestamp = ts; + u->inactive_exit_timestamp = u->state_change_timestamp; else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) - u->inactive_enter_timestamp = ts; + u->inactive_enter_timestamp = u->state_change_timestamp; if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) - u->active_enter_timestamp = ts; + u->active_enter_timestamp = u->state_change_timestamp; else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) - u->active_exit_timestamp = ts; + u->active_exit_timestamp = u->state_change_timestamp; } /* Keep track of failed units */ @@ -2553,10 +2554,13 @@ int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { } } + dual_timestamp_serialize(f, "state-change-timestamp", &u->state_change_timestamp); + dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); + dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); @@ -2695,7 +2699,7 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { /* End marker */ if (isempty(l)) - return 0; + break; k = strcspn(l, "="); @@ -2735,6 +2739,9 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { } else /* legacy for pre-44 */ log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); continue; + } else if (streq(l, "state-change-timestamp")) { + dual_timestamp_deserialize(v, &u->state_change_timestamp); + continue; } else if (streq(l, "inactive-exit-timestamp")) { dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); continue; @@ -2841,6 +2848,15 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); } } + + /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is + * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from + * before 228 where the base for timeouts was not peristet across reboots. */ + + if (!dual_timestamp_is_set(&u->state_change_timestamp)) + dual_timestamp_get(&u->state_change_timestamp); + + return 0; } int unit_add_node_link(Unit *u, const char *what, bool wants, UnitDependency dep) { diff --git a/src/core/unit.h b/src/core/unit.h index 3eb3484fb7..f86a0f687b 100644 --- a/src/core/unit.h +++ b/src/core/unit.h @@ -121,6 +121,10 @@ struct Unit { dual_timestamp condition_timestamp; dual_timestamp assert_timestamp; + /* Updated whenever the low-level state changes */ + dual_timestamp state_change_timestamp; + + /* Updated whenever the (high-level) active state enters or leaves the active or inactive states */ dual_timestamp inactive_exit_timestamp; dual_timestamp active_enter_timestamp; dual_timestamp active_exit_timestamp; -- cgit v1.2.3-54-g00ecf