X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Funit.c;h=66372f2a92a8e4b98f5302aa1ec5bb2a6f371882;hp=327444bba4d087f7b76b154506b498061111a4c5;hb=3b6fdb5b5afebc49a7e987e3e3bf7aa2615d1671;hpb=514f4ef52f91edb3741cad88d34572d162459346 diff --git a/src/unit.c b/src/unit.c index 327444bba..66372f2a9 100644 --- a/src/unit.c +++ b/src/unit.c @@ -39,6 +39,7 @@ #include "specifier.h" #include "dbus-unit.h" #include "special.h" +#include "cgroup-util.h" const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { [UNIT_SERVICE] = &service_vtable, @@ -69,6 +70,7 @@ Unit *unit_new(Manager *m) { u->meta.manager = m; u->meta.type = _UNIT_TYPE_INVALID; u->meta.deserialized_job = _JOB_TYPE_INVALID; + u->meta.default_dependencies = true; return u; } @@ -281,7 +283,8 @@ void unit_add_to_dbus_queue(Unit *u) { if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue) return; - if (set_isempty(u->meta.manager->subscribed)) { + /* Shortcut things if nobody cares */ + if (!bus_has_subscriber(u->meta.manager)) { u->meta.sent_dbus_new_signal = true; return; } @@ -365,8 +368,12 @@ void unit_free(Unit *u) { UnitActiveState unit_active_state(Unit *u) { assert(u); - if (u->meta.load_state != UNIT_LOADED) - return UNIT_INACTIVE; + if (u->meta.load_state == UNIT_MERGED) + return unit_active_state(unit_follow_merge(u)); + + /* After a reload it might happen that a unit is not correctly + * loaded but still has a process around. That's why we won't + * shortcut failed loading to UNIT_INACTIVE_MAINTENANCE. */ return UNIT_VTABLE(u)->active_state(u); } @@ -463,7 +470,7 @@ int unit_merge(Unit *u, Unit *other) { if (other->meta.job) return -EEXIST; - if (unit_active_state(other) != UNIT_INACTIVE) + if (!UNIT_IS_INACTIVE_OR_MAINTENANCE(unit_active_state(other))) return -EEXIST; /* Merge names */ @@ -542,7 +549,7 @@ int unit_add_exec_dependencies(Unit *u, ExecContext *c) { if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) return r; - if (u->meta.manager->running_as != MANAGER_SESSION) + if (u->meta.manager->running_as == MANAGER_SYSTEM) if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) return r; @@ -589,8 +596,7 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) { "%s\tActive Enter Timestamp: %s\n" "%s\tActive Exit Timestamp: %s\n" "%s\tInactive Enter Timestamp: %s\n" - "%s\tGC Check Good: %s\n" - "%s\tOnly By Dependency: %s\n", + "%s\tGC Check Good: %s\n", prefix, u->meta.id, prefix, unit_description(u), prefix, strna(u->meta.instance), @@ -600,8 +606,7 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) { prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)), prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)), prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)), - prefix, yes_no(unit_check_gc(u)), - prefix, yes_no(u->meta.only_by_dependency)); + prefix, yes_no(unit_check_gc(u))); SET_FOREACH(t, u->meta.names, i) fprintf(f, "%s\tName: %s\n", prefix, t); @@ -619,9 +624,15 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) { if (u->meta.load_state == UNIT_LOADED) { fprintf(f, "%s\tRecursive Stop: %s\n" - "%s\tStop When Unneeded: %s\n", + "%s\tStopWhenUnneeded: %s\n" + "%s\tOnlyByDependency: %s\n" + "%s\tDefaultDependencies: %s\n" + "%s\tIgnoreDependencyFailure: %s\n", prefix, yes_no(u->meta.recursive_stop), - prefix, yes_no(u->meta.stop_when_unneeded)); + prefix, yes_no(u->meta.stop_when_unneeded), + prefix, yes_no(u->meta.only_by_dependency), + prefix, yes_no(u->meta.default_dependencies), + prefix, yes_no(u->meta.ignore_dependency_failure)); LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings) fprintf(f, "%s\tControlGroup: %s:%s\n", @@ -730,7 +741,7 @@ fail: u->meta.load_state = UNIT_FAILED; unit_add_to_dbus_queue(u); - log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r)); + log_notice("Failed to load configuration for %s: %s", u->meta.id, strerror(-r)); return r; } @@ -746,6 +757,9 @@ int unit_start(Unit *u) { assert(u); + if (u->meta.load_state != UNIT_LOADED) + return -EINVAL; + /* If this is already (being) started, then this will * succeed. Note that this will even succeed if this unit is * not startable by the user. This is relied on to detect when @@ -765,6 +779,9 @@ int unit_start(Unit *u) { * before it will start again. */ unit_add_to_dbus_queue(u); + + unit_status_printf(u, "Starting %s...\n", unit_description(u)); + return UNIT_VTABLE(u)->start(u); } @@ -785,13 +802,16 @@ int unit_stop(Unit *u) { assert(u); state = unit_active_state(u); - if (state == UNIT_INACTIVE) + if (UNIT_IS_INACTIVE_OR_MAINTENANCE(state)) return -EALREADY; if (!UNIT_VTABLE(u)->stop) return -EBADR; unit_add_to_dbus_queue(u); + + unit_status_printf(u, "Stopping %s...\n", unit_description(u)); + return UNIT_VTABLE(u)->stop(u); } @@ -805,11 +825,14 @@ int unit_reload(Unit *u) { assert(u); + if (u->meta.load_state != UNIT_LOADED) + return -EINVAL; + if (!unit_can_reload(u)) return -EBADR; state = unit_active_state(u); - if (unit_active_state(u) == UNIT_ACTIVE_RELOADING) + if (unit_active_state(u) == UNIT_RELOADING) return -EALREADY; if (unit_active_state(u) != UNIT_ACTIVE) @@ -858,10 +881,10 @@ static void unit_check_uneeded(Unit *u) { if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) return; - log_debug("Service %s is not needed anymore. Stopping.", u->meta.id); + log_info("Service %s is not needed anymore. Stopping.", u->meta.id); /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ - manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL); + manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); } static void retroactively_start_dependencies(Unit *u) { @@ -873,23 +896,23 @@ static void retroactively_start_dependencies(Unit *u) { SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) - manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL); + manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) - manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL); + manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) - manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL); + manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) - manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL); + manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i) if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) - manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL); + manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); } static void retroactively_stop_dependencies(Unit *u) { @@ -903,7 +926,7 @@ static void retroactively_stop_dependencies(Unit *u) { /* Pull down units need us recursively if enabled */ SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) - manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL); + manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); } /* Garbage collect services that might not be needed anymore, if enabled */ @@ -925,8 +948,7 @@ static void retroactively_stop_dependencies(Unit *u) { } void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { - bool unexpected = false; - timestamp ts; + dual_timestamp ts; assert(u); assert(os < _UNIT_ACTIVE_STATE_MAX); @@ -939,11 +961,11 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { * this function will be called too and the utmp code below * relies on that! */ - timestamp_get(&ts); + dual_timestamp_get(&ts); - if (os == UNIT_INACTIVE && ns != UNIT_INACTIVE) + if (UNIT_IS_INACTIVE_OR_MAINTENANCE(os) && !UNIT_IS_INACTIVE_OR_MAINTENANCE(ns)) u->meta.inactive_exit_timestamp = ts; - else if (os != UNIT_INACTIVE && ns == UNIT_INACTIVE) + else if (!UNIT_IS_INACTIVE_OR_MAINTENANCE(os) && UNIT_IS_INACTIVE_OR_MAINTENANCE(ns)) u->meta.inactive_enter_timestamp = ts; if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) @@ -951,10 +973,17 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) u->meta.active_exit_timestamp = ts; + if (ns != os && ns == UNIT_MAINTENANCE) + log_notice("Unit %s entered maintenance state.", u->meta.id); + + if (UNIT_IS_INACTIVE_OR_MAINTENANCE(ns)) + cgroup_bonding_trim_list(u->meta.cgroup_bondings, true); + timer_unit_notify(u, ns); path_unit_notify(u, ns); if (u->meta.job) { + bool unexpected = false; if (u->meta.job->state == JOB_WAITING) @@ -988,7 +1017,7 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { if (u->meta.job->state == JOB_RUNNING) { if (ns == UNIT_ACTIVE) job_finish_and_invalidate(u->meta.job, true); - else if (ns != UNIT_ACTIVATING && ns != UNIT_ACTIVE_RELOADING) { + else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { unexpected = true; job_finish_and_invalidate(u->meta.job, false); } @@ -1000,7 +1029,7 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { case JOB_RESTART: case JOB_TRY_RESTART: - if (ns == UNIT_INACTIVE) + if (ns == UNIT_INACTIVE || ns == UNIT_MAINTENANCE) job_finish_and_invalidate(u->meta.job, true); else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { unexpected = true; @@ -1012,16 +1041,17 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { default: assert_not_reached("Job type unknown"); } - } - /* If this state change happened without being requested by a - * job, then let's retroactively start or stop dependencies */ + /* If this state change happened without being + * requested by a job, then let's retroactively start + * or stop dependencies */ - if (unexpected) { - if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) - retroactively_start_dependencies(u); - else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) - retroactively_stop_dependencies(u); + if (unexpected) { + if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) + retroactively_start_dependencies(u); + else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) + retroactively_stop_dependencies(u); + } } /* Some names are special */ @@ -1030,8 +1060,7 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { /* The bus just might have become available, * hence try to connect to it, if we aren't * yet connected. */ - bus_init_system(u->meta.manager); - bus_init_api(u->meta.manager); + bus_init(u->meta.manager); } if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) @@ -1118,14 +1147,14 @@ int unit_watch_pid(Unit *u, pid_t pid) { /* Watch a specific PID. We only support one unit watching * each PID for now. */ - return hashmap_put(u->meta.manager->watch_pids, UINT32_TO_PTR(pid), u); + return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); } void unit_unwatch_pid(Unit *u, pid_t pid) { assert(u); assert(pid >= 1); - hashmap_remove_value(u->meta.manager->watch_pids, UINT32_TO_PTR(pid), u); + hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); } int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { @@ -1313,6 +1342,20 @@ fail: return r; } +int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { + int r; + + assert(u); + + if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) + return r; + + if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) + return r; + + return 0; +} + static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { char *s; @@ -1357,7 +1400,7 @@ int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, con if (!(name = resolve_template(u, name, path, &s))) return -ENOMEM; - if ((r = manager_load_unit(u->meta.manager, name, path, &other)) < 0) + if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) goto finish; r = unit_add_dependency(u, d, other, add_reference); @@ -1367,6 +1410,27 @@ finish: return r; } +int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { + Unit *other; + int r; + char *s; + + assert(u); + assert(name || path); + + if (!(name = resolve_template(u, name, path, &s))) + return -ENOMEM; + + if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) + goto finish; + + r = unit_add_two_dependencies(u, d, e, other, add_reference); + +finish: + free(s); + return r; +} + int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { Unit *other; int r; @@ -1378,7 +1442,7 @@ int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *n if (!(name = resolve_template(u, name, path, &s))) return -ENOMEM; - if ((r = manager_load_unit(u->meta.manager, name, path, &other)) < 0) + if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) goto finish; r = unit_add_dependency(other, d, u, add_reference); @@ -1388,6 +1452,28 @@ finish: return r; } +int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { + Unit *other; + int r; + char *s; + + assert(u); + assert(name || path); + + if (!(name = resolve_template(u, name, path, &s))) + return -ENOMEM; + + if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) + goto finish; + + if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) + goto finish; + +finish: + free(s); + return r; +} + int set_unit_path(const char *p) { char *cwd, *c; int r; @@ -1515,7 +1601,7 @@ int unit_add_cgroup_from_text(Unit *u, const char *name) { if (n > 0) controller = strndup(name, n); else - controller = strdup(u->meta.manager->cgroup_controller); + controller = strdup(SYSTEMD_CGROUP_CONTROLLER); if (!controller) { r = -ENOMEM; @@ -1564,7 +1650,7 @@ int unit_add_default_cgroup(Unit *u) { if (!(b = new0(CGroupBonding, 1))) return -ENOMEM; - if (!(b->controller = strdup(u->meta.manager->cgroup_controller))) + if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER))) goto fail; if (!(b->path = default_cgroup_path(u))) @@ -1589,7 +1675,7 @@ fail: CGroupBonding* unit_get_default_cgroup(Unit *u) { assert(u); - return cgroup_bonding_find_list(u->meta.cgroup_bondings, u->meta.manager->cgroup_controller); + return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER); } int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { @@ -1605,7 +1691,7 @@ int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { assert(!unit_has_name(u, t)); - r = manager_load_unit(u->meta.manager, t, NULL, _found); + r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found); free(t); assert(r < 0 || *_found != u); @@ -1890,16 +1976,13 @@ int unit_add_node_link(Unit *u, const char *what, bool wants) { if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) return -ENOMEM; - r = manager_load_unit(u->meta.manager, e, NULL, &device); + r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device); free(e); if (r < 0) return r; - if ((r = unit_add_dependency(u, UNIT_AFTER, device, true)) < 0) - return r; - - if ((r = unit_add_dependency(u, UNIT_REQUIRES, device, true)) < 0) + if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, device, true)) < 0) return r; if (wants) @@ -1919,7 +2002,7 @@ int unit_coldplug(Unit *u) { return r; if (u->meta.deserialized_job >= 0) { - if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL)) < 0) + if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL, NULL)) < 0) return r; u->meta.deserialized_job = _JOB_TYPE_INVALID; @@ -1928,6 +2011,29 @@ int unit_coldplug(Unit *u) { return 0; } +void unit_status_printf(Unit *u, const char *format, ...) { + va_list ap; + + assert(u); + assert(format); + + if (!UNIT_VTABLE(u)->show_status) + return; + + if (u->meta.manager->running_as != MANAGER_SYSTEM) + return; + + if (!u->meta.manager->show_status) + return; + + if (!manager_is_booting_or_shutting_down(u->meta.manager)) + return; + + va_start(ap, format); + status_vprintf(format, ap); + va_end(ap); +} + static const char* const unit_type_table[_UNIT_TYPE_MAX] = { [UNIT_SERVICE] = "service", [UNIT_TIMER] = "timer", @@ -1953,7 +2059,9 @@ DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { [UNIT_ACTIVE] = "active", + [UNIT_RELOADING] = "reloading", [UNIT_INACTIVE] = "inactive", + [UNIT_MAINTENANCE] = "maintenance", [UNIT_ACTIVATING] = "activating", [UNIT_DEACTIVATING] = "deactivating" };