chiark / gitweb /
execute: talk directly to the journald, instead to the stdout-syslog-bridge
[elogind.git] / src / unit.c
index d4142098d1f4b742ca357f17aec42824d3efa61d..b31b92fc24ebb054ae1f898f097aec81e2821db2 100644 (file)
@@ -42,6 +42,7 @@
 #include "special.h"
 #include "cgroup-util.h"
 #include "missing.h"
+#include "cgroup-attr.h"
 
 const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = {
         [UNIT_SERVICE] = &service_vtable,
@@ -73,6 +74,7 @@ Unit *unit_new(Manager *m) {
         u->meta.type = _UNIT_TYPE_INVALID;
         u->meta.deserialized_job = _JOB_TYPE_INVALID;
         u->meta.default_dependencies = true;
+        u->meta.unit_file_state = _UNIT_FILE_STATE_INVALID;
 
         return u;
 }
@@ -371,6 +373,7 @@ void unit_free(Unit *u) {
         }
 
         cgroup_bonding_free_list(u->meta.cgroup_bondings, u->meta.manager->n_reloading <= 0);
+        cgroup_attribute_free_list(u->meta.cgroup_attributes);
 
         free(u->meta.description);
         free(u->meta.fragment_path);
@@ -561,8 +564,8 @@ int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
             c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE &&
             c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE &&
             c->std_error != EXEC_OUTPUT_KMSG &&
-            c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE &&
-            c->std_error != EXEC_OUTPUT_KMSG &&
+            c->std_error != EXEC_OUTPUT_SYSLOG &&
+            c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE &&
             c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE)
                 return 0;
 
@@ -570,7 +573,7 @@ int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
          * logging daemon is run first. */
 
         if (u->meta.manager->running_as == MANAGER_SYSTEM)
-                if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0)
+                if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true)) < 0)
                         return r;
 
         return 0;
@@ -591,7 +594,6 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
         Iterator i;
         char *p2;
         const char *prefix2;
-        CGroupBonding *b;
         char
                 timestamp1[FORMAT_TIMESTAMP_MAX],
                 timestamp2[FORMAT_TIMESTAMP_MAX],
@@ -661,6 +663,9 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
         }
 
         if (u->meta.load_state == UNIT_LOADED) {
+                CGroupBonding *b;
+                CGroupAttribute *a;
+
                 fprintf(f,
                         "%s\tStopWhenUnneeded: %s\n"
                         "%s\tRefuseManualStart: %s\n"
@@ -681,6 +686,18 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                         fprintf(f, "%s\tControlGroup: %s:%s\n",
                                 prefix, b->controller, b->path);
 
+                LIST_FOREACH(by_unit, a, u->meta.cgroup_attributes) {
+                        char *v = NULL;
+
+                        if (a->map_callback)
+                                a->map_callback(a->controller, a->name, a->value, &v);
+
+                        fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n",
+                                prefix, a->controller, a->name, v ? v : a->value);
+
+                        free(v);
+                }
+
                 if (UNIT_VTABLE(u)->dump)
                         UNIT_VTABLE(u)->dump(u, f, prefix2);
 
@@ -757,7 +774,7 @@ int unit_add_default_target_dependency(Unit *u, Unit *target) {
         /* If either side wants no automatic dependencies, then let's
          * skip this */
         if (!u->meta.default_dependencies ||
-            target->meta.default_dependencies)
+            !target->meta.default_dependencies)
                 return 0;
 
         /* Don't create loops */
@@ -841,6 +858,7 @@ fail:
         u->meta.load_state = UNIT_ERROR;
         u->meta.load_error = r;
         unit_add_to_dbus_queue(u);
+        unit_add_to_gc_queue(u);
 
         log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));
 
@@ -871,16 +889,20 @@ int unit_start(Unit *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
-         * we need to wait for units and when waiting is finished. */
+        /* If this is already 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 we need to
+         * wait for units and when waiting is finished. */
         state = unit_active_state(u);
         if (UNIT_IS_ACTIVE_OR_RELOADING(state))
                 return -EALREADY;
 
-        /* If the conditions failed, don't do anything at all */
-        if (!unit_condition_test(u)) {
+        /* If the conditions failed, don't do anything at all. If we
+         * already are activating this call might still be useful to
+         * speed up activation in case there is some hold-off time,
+         * but we don't want to recheck the condition in that case. */
+        if (state != UNIT_ACTIVATING &&
+            !unit_condition_test(u)) {
                 log_debug("Starting of %s requested but condition failed. Ignoring.", u->meta.id);
                 return -EALREADY;
         }
@@ -903,7 +925,7 @@ int unit_start(Unit *u) {
 
         unit_add_to_dbus_queue(u);
 
-        unit_status_printf(u, "Starting %s...\n", unit_description(u));
+        unit_status_printf(u, NULL, "Starting %s...", unit_description(u));
         return UNIT_VTABLE(u)->start(u);
 }
 
@@ -945,7 +967,7 @@ int unit_stop(Unit *u) {
 
         unit_add_to_dbus_queue(u);
 
-        unit_status_printf(u, "Stopping %s...\n", unit_description(u));
+        unit_status_printf(u, NULL, "Stopping %s...", unit_description(u));
         return UNIT_VTABLE(u)->stop(u);
 }
 
@@ -1010,19 +1032,19 @@ static void unit_check_unneeded(Unit *u) {
                 return;
 
         SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
-                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
+                if (unit_pending_active(other))
                         return;
 
         SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
-                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
+                if (unit_pending_active(other))
                         return;
 
         SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i)
-                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
+                if (unit_pending_active(other))
                         return;
 
         SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i)
-                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
+                if (unit_pending_active(other))
                         return;
 
         log_info("Service %s is not needed anymore. Stopping.", u->meta.id);
@@ -1083,6 +1105,14 @@ static void retroactively_stop_dependencies(Unit *u) {
         SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_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, NULL);
+}
+
+static void check_unneeded_dependencies(Unit *u) {
+        Iterator i;
+        Unit *other;
+
+        assert(u);
+        assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));
 
         /* Garbage collect services that might not be needed anymore, if enabled */
         SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
@@ -1241,6 +1271,10 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
                                 retroactively_stop_dependencies(u);
                 }
 
+                /* stop unneeded units regardless if going down was expected or not */
+                if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
+                        check_unneeded_dependencies(u);
+
                 if (ns != os && ns == UNIT_FAILED) {
                         log_notice("Unit %s entered failed state.", u->meta.id);
                         unit_trigger_on_failure(u);
@@ -1771,22 +1805,22 @@ int unit_add_cgroup(Unit *u, CGroupBonding *b) {
 
 static char *default_cgroup_path(Unit *u) {
         char *p;
-        int r;
 
         assert(u);
 
         if (u->meta.instance) {
                 char *t;
 
-                if (!(t = unit_name_template(u->meta.id)))
+                t = unit_name_template(u->meta.id);
+                if (!t)
                         return NULL;
 
-                r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance);
+                p = join(u->meta.manager->cgroup_hierarchy, "/", t, "/", u->meta.instance, NULL);
                 free(t);
         } else
-                r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id);
+                p = join(u->meta.manager->cgroup_hierarchy, "/", u->meta.id, NULL);
 
-        return r < 0 ? NULL : p;
+        return p;
 }
 
 int unit_add_cgroup_from_text(Unit *u, const char *name) {
@@ -1884,8 +1918,10 @@ fail:
 }
 
 int unit_add_default_cgroups(Unit *u) {
+        CGroupAttribute *a;
         char **c;
         int r;
+
         assert(u);
 
         /* Adds in the default cgroups, if they weren't specified
@@ -1898,8 +1934,10 @@ int unit_add_default_cgroups(Unit *u) {
                 return r;
 
         STRV_FOREACH(c, u->meta.manager->default_controllers)
-                if ((r = unit_add_one_default_cgroup(u, *c)) < 0)
-                        return r;
+                unit_add_one_default_cgroup(u, *c);
+
+        LIST_FOREACH(by_unit, a, u->meta.cgroup_attributes)
+                unit_add_one_default_cgroup(u, a->controller);
 
         return 0;
 }
@@ -1910,6 +1948,69 @@ CGroupBonding* unit_get_default_cgroup(Unit *u) {
         return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER);
 }
 
+int unit_add_cgroup_attribute(Unit *u, const char *controller, const char *name, const char *value, CGroupAttributeMapCallback map_callback) {
+        int r;
+        char *c = NULL;
+        CGroupAttribute *a;
+
+        assert(u);
+        assert(name);
+        assert(value);
+
+        if (!controller) {
+                const char *dot;
+
+                dot = strchr(name, '.');
+                if (!dot)
+                        return -EINVAL;
+
+                c = strndup(name, dot - name);
+                if (!c)
+                        return -ENOMEM;
+
+                controller = c;
+        }
+
+        if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)) {
+                r = -EINVAL;
+                goto finish;
+        }
+
+        a = new0(CGroupAttribute, 1);
+        if (!a) {
+                r = -ENOMEM;
+                goto finish;
+        }
+
+        if (c) {
+                a->controller = c;
+                c = NULL;
+        } else
+                a->controller = strdup(controller);
+
+        a->name = strdup(name);
+        a->value = strdup(value);
+
+        if (!a->controller || !a->name || !a->value) {
+                free(a->controller);
+                free(a->name);
+                free(a->value);
+                free(a);
+
+                return -ENOMEM;
+        }
+
+        a->map_callback = map_callback;
+
+        LIST_PREPEND(CGroupAttribute, by_unit, u->meta.cgroup_attributes, a);
+
+        r = 0;
+
+finish:
+        free(c);
+        return r;
+}
+
 int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
         char *t;
         int r;
@@ -2338,7 +2439,7 @@ int unit_coldplug(Unit *u) {
         return 0;
 }
 
-void unit_status_printf(Unit *u, const char *format, ...) {
+void unit_status_printf(Unit *u, const char *status, const char *format, ...) {
         va_list ap;
 
         assert(u);
@@ -2347,20 +2448,14 @@ void unit_status_printf(Unit *u, const char *format, ...) {
         if (!UNIT_VTABLE(u)->show_status)
                 return;
 
-        if (u->meta.manager->running_as != MANAGER_SYSTEM)
-                return;
-
-        /* If Plymouth is running make sure we show the status, so
-         * that there's something nice to see when people press Esc */
-
-        if (!u->meta.manager->show_status && !plymouth_running())
+        if (!manager_get_show_status(u->meta.manager))
                 return;
 
         if (!manager_is_booting_or_shutting_down(u->meta.manager))
                 return;
 
         va_start(ap, format);
-        status_vprintf(format, ap);
+        status_vprintf(status, true, format, ap);
         va_end(ap);
 }
 
@@ -2419,7 +2514,7 @@ bool unit_pending_inactive(Unit *u) {
 bool unit_pending_active(Unit *u) {
         assert(u);
 
-        /* Returns true if the unit is inactive or going down */
+        /* Returns true if the unit is active or going up */
 
         if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
                 return true;
@@ -2482,6 +2577,17 @@ int unit_following_set(Unit *u, Set **s) {
         return 0;
 }
 
+UnitFileState unit_get_unit_file_state(Unit *u) {
+        assert(u);
+
+        if (u->meta.unit_file_state < 0 && u->meta.fragment_path)
+                u->meta.unit_file_state = unit_file_get_state(
+                                u->meta.manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER,
+                                NULL, file_name_from_path(u->meta.fragment_path));
+
+        return u->meta.unit_file_state;
+}
+
 static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
         [UNIT_STUB] = "stub",
         [UNIT_LOADED] = "loaded",