chiark / gitweb /
target: add default unit ordering deps from the unit not the target
[elogind.git] / src / unit.c
index 50f3b8fabd5f76266e0c50d66618763c197b17d6..d28a0a8cf7637b461ebbe8334bc6f82a22e7ce46 100644 (file)
@@ -1,4 +1,4 @@
-/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
 /***
   This file is part of systemd.
@@ -41,6 +41,7 @@
 #include "dbus-unit.h"
 #include "special.h"
 #include "cgroup-util.h"
+#include "missing.h"
 
 const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = {
         [UNIT_SERVICE] = &service_vtable,
@@ -235,6 +236,9 @@ bool unit_check_gc(Unit *u) {
         if (UNIT_VTABLE(u)->no_gc)
                 return true;
 
+        if (u->meta.no_gc)
+                return true;
+
         if (u->meta.job)
                 return true;
 
@@ -384,7 +388,7 @@ UnitActiveState unit_active_state(Unit *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. */
+         * shortcut failed loading to UNIT_INACTIVE_FAILED. */
 
         return UNIT_VTABLE(u)->active_state(u);
 }
@@ -475,13 +479,13 @@ int unit_merge(Unit *u, Unit *other) {
                 return -EINVAL;
 
         if (other->meta.load_state != UNIT_STUB &&
-            other->meta.load_state != UNIT_FAILED)
+            other->meta.load_state != UNIT_ERROR)
                 return -EEXIST;
 
         if (other->meta.job)
                 return -EEXIST;
 
-        if (!UNIT_IS_INACTIVE_OR_MAINTENANCE(unit_active_state(other)))
+        if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
                 return -EEXIST;
 
         /* Merge names */
@@ -589,6 +593,7 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                 timestamp3[FORMAT_TIMESTAMP_MAX],
                 timestamp4[FORMAT_TIMESTAMP_MAX],
                 timespan[FORMAT_TIMESPAN_MAX];
+        Unit *following;
 
         assert(u);
         assert(u->meta.type >= 0);
@@ -625,8 +630,8 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
         SET_FOREACH(t, u->meta.names, i)
                 fprintf(f, "%s\tName: %s\n", prefix, t);
 
-        if (u->meta.following)
-                fprintf(f, "%s\tFollowing: %s\n", prefix, u->meta.following->meta.id);
+        if ((following = unit_following(u)))
+                fprintf(f, "%s\tFollowing: %s\n", prefix, following->meta.id);
 
         if (u->meta.fragment_path)
                 fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path);
@@ -645,12 +650,14 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                 fprintf(f,
                         "%s\tRecursive Stop: %s\n"
                         "%s\tStopWhenUnneeded: %s\n"
-                        "%s\tOnlyByDependency: %s\n"
+                        "%s\tRefuseManualStart: %s\n"
+                        "%s\tRefuseManualStop: %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.only_by_dependency),
+                        prefix, yes_no(u->meta.refuse_manual_start),
+                        prefix, yes_no(u->meta.refuse_manual_stop),
                         prefix, yes_no(u->meta.default_dependencies),
                         prefix, yes_no(u->meta.ignore_dependency_failure));
 
@@ -665,6 +672,9 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                 fprintf(f,
                         "%s\tMerged into: %s\n",
                         prefix, u->meta.merged_into->meta.id);
+        else if (u->meta.load_state == UNIT_ERROR)
+                fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->meta.load_error));
+
 
         if (u->meta.job)
                 job_dump(u->meta.job, f, prefix2);
@@ -715,12 +725,38 @@ int unit_load_fragment_and_dropin_optional(Unit *u) {
         return 0;
 }
 
-/* Common implementation for multiple backends */
-int unit_load_nop(Unit *u) {
+static int unit_add_one_default_dependency(Unit *u, Unit *target) {
         assert(u);
+        assert(target);
 
-        if (u->meta.load_state == UNIT_STUB)
-                u->meta.load_state = UNIT_LOADED;
+        if (target->meta.type != UNIT_TARGET)
+                return 0;
+
+        /* Don't create loops */
+        if (set_get(target->meta.dependencies[UNIT_BEFORE], u))
+                return 0;
+
+        return unit_add_dependency(target, UNIT_AFTER, u, true);
+}
+
+static int unit_add_default_dependencies(Unit *u) {
+        Unit *other;
+        Iterator i;
+        int r;
+
+        assert(u);
+
+        SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
+                if ((r = unit_add_one_default_dependency(u, other)) < 0)
+                        return r;
+
+        SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
+                if ((r = unit_add_one_default_dependency(u, other)) < 0)
+                        return r;
+
+        SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i)
+                if ((r = unit_add_one_default_dependency(u, other)) < 0)
+                        return r;
 
         return 0;
 }
@@ -750,6 +786,11 @@ int unit_load(Unit *u) {
                 goto fail;
         }
 
+        if (u->meta.load_state == UNIT_LOADED &&
+            u->meta.default_dependencies)
+                if ((r = unit_add_default_dependencies(u)) < 0)
+                        goto fail;
+
         assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into);
 
         unit_add_to_dbus_queue(unit_follow_merge(u));
@@ -758,10 +799,11 @@ int unit_load(Unit *u) {
         return 0;
 
 fail:
-        u->meta.load_state = UNIT_FAILED;
+        u->meta.load_state = UNIT_ERROR;
+        u->meta.load_error = r;
         unit_add_to_dbus_queue(u);
 
-        log_notice("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));
+        log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));
 
         return r;
 }
@@ -811,6 +853,13 @@ bool unit_can_start(Unit *u) {
         return !!UNIT_VTABLE(u)->start;
 }
 
+bool unit_can_isolate(Unit *u) {
+        assert(u);
+
+        return unit_can_start(u) &&
+                u->meta.allow_isolate;
+}
+
 /* Errors:
  *         -EBADR:    This unit type does not support stopping.
  *         -EALREADY: Unit is already stopped.
@@ -822,7 +871,7 @@ int unit_stop(Unit *u) {
         assert(u);
 
         state = unit_active_state(u);
-        if (UNIT_IS_INACTIVE_OR_MAINTENANCE(state))
+        if (UNIT_IS_INACTIVE_OR_FAILED(state))
                 return -EALREADY;
 
         if (!UNIT_VTABLE(u)->stop)
@@ -852,10 +901,10 @@ int unit_reload(Unit *u) {
                 return -EBADR;
 
         state = unit_active_state(u);
-        if (unit_active_state(u) == UNIT_RELOADING)
+        if (state == UNIT_RELOADING)
                 return -EALREADY;
 
-        if (unit_active_state(u) != UNIT_ACTIVE)
+        if (state != UNIT_ACTIVE)
                 return -ENOEXEC;
 
         unit_add_to_dbus_queue(u);
@@ -933,6 +982,10 @@ static void retroactively_start_dependencies(Unit *u) {
         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, NULL);
+
+        SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTED_BY], i)
+                if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
+                        manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
 }
 
 static void retroactively_stop_dependencies(Unit *u) {
@@ -979,14 +1032,13 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
          * even if they might map to the same high-level
          * UnitActiveState! That means that ns == os is OK an expected
          * behaviour here. For example: if a mount point is remounted
-         * this function will be called too and the utmp code below
-         * relies on that! */
+         * this function will be called too! */
 
         dual_timestamp_get(&ts);
 
-        if (UNIT_IS_INACTIVE_OR_MAINTENANCE(os) && !UNIT_IS_INACTIVE_OR_MAINTENANCE(ns))
+        if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns))
                 u->meta.inactive_exit_timestamp = ts;
-        else if (!UNIT_IS_INACTIVE_OR_MAINTENANCE(os) && UNIT_IS_INACTIVE_OR_MAINTENANCE(ns))
+        else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns))
                 u->meta.inactive_enter_timestamp = ts;
 
         if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns))
@@ -994,7 +1046,7 @@ 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 (UNIT_IS_INACTIVE_OR_MAINTENANCE(ns))
+        if (UNIT_IS_INACTIVE_OR_FAILED(ns))
                 cgroup_bonding_trim_list(u->meta.cgroup_bondings, true);
 
         timer_unit_notify(u, ns);
@@ -1023,7 +1075,9 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
                                 job_finish_and_invalidate(u->meta.job, true);
                         else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) {
                                 unexpected = true;
-                                job_finish_and_invalidate(u->meta.job, false);
+
+                                if (UNIT_IS_INACTIVE_OR_FAILED(ns))
+                                        job_finish_and_invalidate(u->meta.job, ns != UNIT_FAILED);
                         }
 
                         break;
@@ -1036,7 +1090,9 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
                                         job_finish_and_invalidate(u->meta.job, true);
                                 else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) {
                                         unexpected = true;
-                                        job_finish_and_invalidate(u->meta.job, false);
+
+                                        if (UNIT_IS_INACTIVE_OR_FAILED(ns))
+                                                job_finish_and_invalidate(u->meta.job, ns != UNIT_FAILED);
                                 }
                         }
 
@@ -1046,7 +1102,7 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
                 case JOB_RESTART:
                 case JOB_TRY_RESTART:
 
-                        if (ns == UNIT_INACTIVE || ns == UNIT_MAINTENANCE)
+                        if (UNIT_IS_INACTIVE_OR_FAILED(ns))
                                 job_finish_and_invalidate(u->meta.job, true);
                         else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) {
                                 unexpected = true;
@@ -1069,30 +1125,29 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
          * something is already activated. */
 
         if (unexpected && u->meta.manager->n_deserializing <= 0) {
-                if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns))
+                if (UNIT_IS_INACTIVE_OR_FAILED(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 (ns != os && ns == UNIT_MAINTENANCE) {
+        if (ns != os && ns == UNIT_FAILED) {
                 Iterator i;
                 Unit *other;
 
                 SET_FOREACH(other, u->meta.dependencies[UNIT_ON_FAILURE], i)
                         manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
 
-                log_notice("Unit %s entered maintenance state.", u->meta.id);
+                log_notice("Unit %s entered failed state.", u->meta.id);
         }
 
         /* Some names are special */
         if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
-                if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) {
+                if (unit_has_name(u, SPECIAL_DBUS_SERVICE))
                         /* The bus just might have become available,
                          * hence try to connect to it, if we aren't
                          * yet connected. */
                         bus_init(u->meta.manager);
-                }
 
                 if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
                         /* The syslog daemon just might have become
@@ -1100,17 +1155,14 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
                          * we aren't yet connected. */
                         log_open();
 
-                if (u->meta.type == UNIT_MOUNT)
-                        /* Another directory became available, let's
-                         * check if that is enough to write our utmp
-                         * entry. */
-                        manager_write_utmp_reboot(u->meta.manager);
-
-                if (u->meta.type == UNIT_TARGET)
-                        /* A target got activated, maybe this is a runlevel? */
-                        manager_write_utmp_runlevel(u->meta.manager, u);
+                if (u->meta.type == UNIT_SERVICE &&
+                    !UNIT_IS_ACTIVE_OR_RELOADING(os)) {
+                        /* Write audit record if we have just finished starting up */
+                        manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, 1);
+                        u->meta.in_audit = true;
+                }
 
-        } else if (!UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
+        } else {
 
                 if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
                         /* The syslog daemon might just have
@@ -1120,6 +1172,25 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
 
                 /* We don't care about D-Bus here, since we'll get an
                  * asynchronous notification for it anyway. */
+
+                if (u->meta.type == UNIT_SERVICE &&
+                    UNIT_IS_INACTIVE_OR_FAILED(ns) &&
+                    !UNIT_IS_INACTIVE_OR_FAILED(os)) {
+
+                        /* Hmm, if there was no start record written
+                         * write it now, so that we always have a nice
+                         * pair */
+                        if (!u->meta.in_audit) {
+                                manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE);
+
+                                if (ns == UNIT_INACTIVE)
+                                        manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, true);
+                        } else
+                                /* Write audit record if we have just finished shutting down */
+                                manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE);
+
+                        u->meta.in_audit = false;
+                }
         }
 
         /* Maybe we finished startup and are now ready for being
@@ -1311,7 +1382,8 @@ int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_referen
                 [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID,
                 [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID,
                 [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID,
-                [UNIT_CONFLICTS] = UNIT_CONFLICTS,
+                [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY,
+                [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS,
                 [UNIT_BEFORE] = UNIT_AFTER,
                 [UNIT_AFTER] = UNIT_BEFORE,
                 [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID,
@@ -1550,6 +1622,9 @@ char *unit_dbus_path(Unit *u) {
 
         assert(u);
 
+        if (!u->meta.id)
+                return NULL;
+
         if (!(e = bus_path_escape(u->meta.id)))
                 return NULL;
 
@@ -1950,6 +2025,7 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
                         return -errno;
                 }
 
+                char_array_0(line);
                 l = strstrip(line);
 
                 /* End marker */
@@ -2074,31 +2150,40 @@ bool unit_need_daemon_reload(Unit *u) {
                 timespec_load(&st.st_mtim) != u->meta.fragment_mtime;
 }
 
-void unit_reset_maintenance(Unit *u) {
+void unit_reset_failed(Unit *u) {
         assert(u);
 
-        if (UNIT_VTABLE(u)->reset_maintenance)
-                UNIT_VTABLE(u)->reset_maintenance(u);
+        if (UNIT_VTABLE(u)->reset_failed)
+                UNIT_VTABLE(u)->reset_failed(u);
 }
 
-static const char* const unit_type_table[_UNIT_TYPE_MAX] = {
-        [UNIT_SERVICE] = "service",
-        [UNIT_TIMER] = "timer",
-        [UNIT_SOCKET] = "socket",
-        [UNIT_TARGET] = "target",
-        [UNIT_DEVICE] = "device",
-        [UNIT_MOUNT] = "mount",
-        [UNIT_AUTOMOUNT] = "automount",
-        [UNIT_SNAPSHOT] = "snapshot",
-        [UNIT_SWAP] = "swap"
-};
+Unit *unit_following(Unit *u) {
+        assert(u);
+
+        if (UNIT_VTABLE(u)->following)
+                return UNIT_VTABLE(u)->following(u);
+
+        return NULL;
+}
+
+bool unit_pending_inactive(Unit *u) {
+        assert(u);
+
+        /* Returns true if the unit is inactive or going down */
 
-DEFINE_STRING_TABLE_LOOKUP(unit_type, UnitType);
+        if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)))
+                return true;
+
+        if (u->meta.job && u->meta.job->type == JOB_STOP)
+                return true;
+
+        return false;
+}
 
 static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
         [UNIT_STUB] = "stub",
         [UNIT_LOADED] = "loaded",
-        [UNIT_FAILED] = "failed",
+        [UNIT_ERROR] = "error",
         [UNIT_MERGED] = "merged"
 };
 
@@ -2108,7 +2193,7 @@ 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_FAILED] = "failed",
         [UNIT_ACTIVATING] = "activating",
         [UNIT_DEACTIVATING] = "deactivating"
 };
@@ -2125,6 +2210,7 @@ static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = {
         [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable",
         [UNIT_WANTED_BY] = "WantedBy",
         [UNIT_CONFLICTS] = "Conflicts",
+        [UNIT_CONFLICTED_BY] = "ConflictedBy",
         [UNIT_BEFORE] = "Before",
         [UNIT_AFTER] = "After",
         [UNIT_REFERENCES] = "References",