chiark / gitweb /
dbus: make more cgroup attributes runtime settable
[elogind.git] / src / core / unit.c
index a1249dc093b47de9c172c571f200449c7fcb6fff..211704e230603882f78490ee314df5163a469252 100644 (file)
@@ -44,7 +44,6 @@
 #include "special.h"
 #include "cgroup-util.h"
 #include "missing.h"
-#include "cgroup-attr.h"
 #include "mkdir.h"
 #include "label.h"
 #include "fileio-label.h"
@@ -60,7 +59,8 @@ const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = {
         [UNIT_AUTOMOUNT] = &automount_vtable,
         [UNIT_SNAPSHOT] = &snapshot_vtable,
         [UNIT_SWAP] = &swap_vtable,
-        [UNIT_PATH] = &path_vtable
+        [UNIT_PATH] = &path_vtable,
+        [UNIT_SLICE] = &slice_vtable
 };
 
 Unit *unit_new(Manager *m, size_t size) {
@@ -401,19 +401,23 @@ void unit_free(Unit *u) {
                 u->manager->n_in_gc_queue--;
         }
 
-        cgroup_bonding_free_list(u->cgroup_bondings, u->manager->n_reloading <= 0);
-        cgroup_attribute_free_list(u->cgroup_attributes);
+        if (u->in_cgroup_queue)
+                LIST_REMOVE(Unit, cgroup_queue, u->manager->cgroup_queue, u);
 
+        free(u->cgroup_path);
         free(u->description);
         strv_free(u->documentation);
         free(u->fragment_path);
         free(u->source_path);
+        strv_free(u->dropin_paths);
         free(u->instance);
 
         set_free_free(u->names);
 
         condition_free_list(u->conditions);
 
+        unit_ref_unset(&u->slice);
+
         while (u->refs)
                 unit_ref_unset(u->refs);
 
@@ -668,7 +672,11 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                 "%s\tActive Exit Timestamp: %s\n"
                 "%s\tInactive Enter Timestamp: %s\n"
                 "%s\tGC Check Good: %s\n"
-                "%s\tNeed Daemon Reload: %s\n",
+                "%s\tNeed Daemon Reload: %s\n"
+                "%s\tSlice: %s\n"
+                "%s\tCGroup: %s\n"
+                "%s\tCGroup realized: %s\n"
+                "%s\tCGroup mask: 0x%x\n",
                 prefix, u->id,
                 prefix, unit_description(u),
                 prefix, strna(u->instance),
@@ -679,7 +687,11 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                 prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)),
                 prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)),
                 prefix, yes_no(unit_check_gc(u)),
-                prefix, yes_no(unit_need_daemon_reload(u)));
+                prefix, yes_no(unit_need_daemon_reload(u)),
+                prefix, strna(unit_slice_name(u)),
+                prefix, strna(u->cgroup_path),
+                prefix, yes_no(u->cgroup_realized),
+                prefix, u->cgroup_mask);
 
         SET_FOREACH(t, u->names, i)
                 fprintf(f, "%s\tName: %s\n", prefix, t);
@@ -696,8 +708,11 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
         if (u->source_path)
                 fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path);
 
+        STRV_FOREACH(j, u->dropin_paths)
+                fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j);
+
         if (u->job_timeout > 0)
-                fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout));
+                fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0));
 
         condition_dump_list(u->conditions, f, prefix);
 
@@ -726,8 +741,6 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
         }
 
         if (u->load_state == UNIT_LOADED) {
-                CGroupBonding *b;
-                CGroupAttribute *a;
 
                 fprintf(f,
                         "%s\tStopWhenUnneeded: %s\n"
@@ -745,20 +758,6 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                         prefix, yes_no(u->ignore_on_isolate),
                         prefix, yes_no(u->ignore_on_snapshot));
 
-                LIST_FOREACH(by_unit, b, u->cgroup_bondings)
-                        fprintf(f, "%s\tControlGroup: %s:%s\n",
-                                prefix, b->controller, b->path);
-
-                LIST_FOREACH(by_unit, a, u->cgroup_attributes) {
-                        _cleanup_free_ char *v = NULL;
-
-                        if (a->semantics && a->semantics->map_write)
-                                a->semantics->map_write(a->semantics, a->value, &v);
-
-                        fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n",
-                                prefix, a->controller, a->name, v ? v : a->value);
-                }
-
                 if (UNIT_VTABLE(u)->dump)
                         UNIT_VTABLE(u)->dump(u, f, prefix2);
 
@@ -786,14 +785,16 @@ int unit_load_fragment_and_dropin(Unit *u) {
         assert(u);
 
         /* Load a .service file */
-        if ((r = unit_load_fragment(u)) < 0)
+        r = unit_load_fragment(u);
+        if (r < 0)
                 return r;
 
         if (u->load_state == UNIT_STUB)
                 return -ENOENT;
 
         /* Load drop-in directory data */
-        if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
+        r = unit_load_dropin(unit_follow_merge(u));
+        if (r < 0)
                 return r;
 
         return 0;
@@ -809,14 +810,16 @@ int unit_load_fragment_and_dropin_optional(Unit *u) {
          * something can be loaded or not doesn't matter. */
 
         /* Load a .service file */
-        if ((r = unit_load_fragment(u)) < 0)
+        r = unit_load_fragment(u);
+        if (r < 0)
                 return r;
 
         if (u->load_state == UNIT_STUB)
                 u->load_state = UNIT_LOADED;
 
         /* Load drop-in directory data */
-        if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
+        r = unit_load_dropin(unit_follow_merge(u));
+        if (r < 0)
                 return r;
 
         return 0;
@@ -849,6 +852,7 @@ int unit_add_default_target_dependency(Unit *u, Unit *target) {
 }
 
 static int unit_add_default_dependencies(Unit *u) {
+
         static const UnitDependency deps[] = {
                 UNIT_REQUIRED_BY,
                 UNIT_REQUIRED_BY_OVERRIDABLE,
@@ -864,9 +868,21 @@ static int unit_add_default_dependencies(Unit *u) {
         assert(u);
 
         for (k = 0; k < ELEMENTSOF(deps); k++)
-                SET_FOREACH(target, u->dependencies[deps[k]], i)
-                        if ((r = unit_add_default_target_dependency(u, target)) < 0)
+                SET_FOREACH(target, u->dependencies[deps[k]], i) {
+                        r = unit_add_default_target_dependency(u, target);
+                        if (r < 0)
                                 return r;
+                }
+
+        if (u->default_dependencies && unit_get_cgroup_context(u)) {
+                if (UNIT_ISSET(u->slice))
+                        r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true);
+                else
+                        r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true);
+
+                if (r < 0)
+                        return r;
+        }
 
         return 0;
 }
@@ -910,8 +926,8 @@ int unit_load(Unit *u) {
         if (u->on_failure_isolate &&
             set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) {
 
-                log_error("More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.",
-                          u->id);
+                log_error_unit(u->id,
+                               "More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.", u->id);
 
                 r = -EINVAL;
                 goto fail;
@@ -930,7 +946,8 @@ fail:
         unit_add_to_dbus_queue(u);
         unit_add_to_gc_queue(u);
 
-        log_debug("Failed to load configuration for %s: %s", u->id, strerror(-r));
+        log_debug_unit(u->id, "Failed to load configuration for %s: %s",
+                       u->id, strerror(-r));
 
         return r;
 }
@@ -944,7 +961,7 @@ bool unit_condition_test(Unit *u) {
         return u->condition_result;
 }
 
-static const char* unit_get_status_message_format(Unit *u, JobType t) {
+_pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) {
         const UnitStatusMessageFormats *format_table;
 
         assert(u);
@@ -961,7 +978,7 @@ static const char* unit_get_status_message_format(Unit *u, JobType t) {
         return format_table->starting_stopping[t == JOB_STOP];
 }
 
-static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) {
+_pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) {
         const char *format;
 
         assert(u);
@@ -1027,10 +1044,10 @@ static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) {
                                SD_MESSAGE_UNIT_RELOADING;
 
         log_struct_unit(LOG_INFO,
-                   u->id,
-                   MESSAGE_ID(mid),
-                   "MESSAGE=%s", buf,
-                   NULL);
+                        u->id,
+                        MESSAGE_ID(mid),
+                        "MESSAGE=%s", buf,
+                        NULL);
 }
 #pragma GCC diagnostic pop
 
@@ -1063,13 +1080,14 @@ int unit_start(Unit *u) {
          * 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->id);
+                log_debug_unit(u->id, "Starting of %s requested but condition failed. Ignoring.", u->id);
                 return -EALREADY;
         }
 
         /* Forward to the main object, if we aren't it. */
         if ((following = unit_following(u))) {
-                log_debug("Redirecting start request from %s to %s.", u->id, following->id);
+                log_debug_unit(u->id, "Redirecting start request from %s to %s.",
+                               u->id, following->id);
                 return unit_start(following);
         }
 
@@ -1120,7 +1138,8 @@ int unit_stop(Unit *u) {
                 return -EALREADY;
 
         if ((following = unit_following(u))) {
-                log_debug("Redirecting stop request from %s to %s.", u->id, following->id);
+                log_debug_unit(u->id, "Redirecting stop request from %s to %s.",
+                               u->id, following->id);
                 return unit_stop(following);
         }
 
@@ -1160,7 +1179,8 @@ int unit_reload(Unit *u) {
                 return -ENOEXEC;
 
         if ((following = unit_following(u))) {
-                log_debug("Redirecting reload request from %s to %s.", u->id, following->id);
+                log_debug_unit(u->id, "Redirecting reload request from %s to %s.",
+                               u->id, following->id);
                 return unit_reload(following);
         }
 
@@ -1198,22 +1218,22 @@ static void unit_check_unneeded(Unit *u) {
                 return;
 
         SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i)
-                if (unit_pending_active(other))
+                if (unit_active_or_pending(other))
                         return;
 
         SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
-                if (unit_pending_active(other))
+                if (unit_active_or_pending(other))
                         return;
 
         SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i)
-                if (unit_pending_active(other))
+                if (unit_active_or_pending(other))
                         return;
 
         SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i)
-                if (unit_pending_active(other))
+                if (unit_active_or_pending(other))
                         return;
 
-        log_info("Service %s is not needed anymore. Stopping.", u->id);
+        log_info_unit(u->id, "Service %s is not needed anymore. Stopping.", u->id);
 
         /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
         manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL);
@@ -1241,11 +1261,6 @@ static void retroactively_start_dependencies(Unit *u) {
                     !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
                         manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
 
-        SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i)
-                if (!set_get(u->dependencies[UNIT_AFTER], other) &&
-                    !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
-                        manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
-
         SET_FOREACH(other, u->dependencies[UNIT_WANTS], i)
                 if (!set_get(u->dependencies[UNIT_AFTER], other) &&
                     !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
@@ -1301,7 +1316,7 @@ static void check_unneeded_dependencies(Unit *u) {
                         unit_check_unneeded(other);
 }
 
-void unit_trigger_on_failure(Unit *u) {
+void unit_start_on_failure(Unit *u) {
         Unit *other;
         Iterator i;
 
@@ -1310,16 +1325,28 @@ void unit_trigger_on_failure(Unit *u) {
         if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0)
                 return;
 
-        log_info("Triggering OnFailure= dependencies of %s.", u->id);
+        log_info_unit(u->id, "Triggering OnFailure= dependencies of %s.", u->id);
 
         SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) {
                 int r;
 
-                if ((r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL)) < 0)
-                        log_error("Failed to enqueue OnFailure= job: %s", strerror(-r));
+                r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL);
+                if (r < 0)
+                        log_error_unit(u->id, "Failed to enqueue OnFailure= job: %s", strerror(-r));
         }
 }
 
+void unit_trigger_notify(Unit *u) {
+        Unit *other;
+        Iterator i;
+
+        assert(u);
+
+        SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i)
+                if (UNIT_VTABLE(other)->trigger_notify)
+                        UNIT_VTABLE(other)->trigger_notify(other, u);
+}
+
 void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) {
         Manager *m;
         bool unexpected;
@@ -1350,13 +1377,10 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
                         u->active_enter_timestamp = ts;
                 else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns))
                         u->active_exit_timestamp = ts;
-
-                timer_unit_notify(u, ns);
-                path_unit_notify(u, ns);
         }
 
         if (UNIT_IS_INACTIVE_OR_FAILED(ns))
-                cgroup_bonding_trim_list(u->cgroup_bondings, true);
+                unit_destroy_cgroup(u);
 
         if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) {
                 ExecContext *ec = unit_get_exec_context(u);
@@ -1455,11 +1479,9 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
                         check_unneeded_dependencies(u);
 
                 if (ns != os && ns == UNIT_FAILED) {
-                        log_struct_unit(LOG_NOTICE,
-                                   u->id,
-                                   "MESSAGE=Unit %s entered failed state", u->id,
-                                   NULL);
-                        unit_trigger_on_failure(u);
+                        log_notice_unit(u->id,
+                                        "Unit %s entered failed state.", u->id);
+                        unit_start_on_failure(u);
                 }
         }
 
@@ -1510,6 +1532,7 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
         }
 
         manager_recheck_journal(m);
+        unit_trigger_notify(u);
 
         /* Maybe we finished startup and are now ready for being
          * stopped because unneeded? */
@@ -1521,17 +1544,16 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
 }
 
 int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
-        struct epoll_event ev;
+        struct epoll_event ev = {
+                .data.ptr = w,
+                .events = events,
+        };
 
         assert(u);
         assert(fd >= 0);
         assert(w);
         assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u));
 
-        zero(ev);
-        ev.data.ptr = w;
-        ev.events = events;
-
         if (epoll_ctl(u->manager->epoll_fd,
                       w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD,
                       fd,
@@ -1579,7 +1601,7 @@ void unit_unwatch_pid(Unit *u, pid_t pid) {
 }
 
 int unit_watch_timer(Unit *u, clockid_t clock_id, bool relative, usec_t usec, Watch *w) {
-        struct itimerspec its;
+        struct itimerspec its = {};
         int flags, fd;
         bool ours;
 
@@ -1604,8 +1626,6 @@ int unit_watch_timer(Unit *u, clockid_t clock_id, bool relative, usec_t usec, Wa
         } else
                 assert_not_reached("Invalid watch type");
 
-        zero(its);
-
         if (usec <= 0) {
                 /* Set absolute time in the past, but not 0, since we
                  * don't want to disarm the timer */
@@ -1623,11 +1643,10 @@ int unit_watch_timer(Unit *u, clockid_t clock_id, bool relative, usec_t usec, Wa
                 goto fail;
 
         if (w->type == WATCH_INVALID) {
-                struct epoll_event ev;
-
-                zero(ev);
-                ev.data.ptr = w;
-                ev.events = EPOLLIN;
+                struct epoll_event ev = {
+                        .data.ptr = w,
+                        .events = EPOLLIN,
+                };
 
                 if (epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0)
                         goto fail;
@@ -1812,14 +1831,13 @@ static const char *resolve_template(Unit *u, const char *name, const char*path,
         if (u->instance)
                 s = unit_name_replace_instance(name, u->instance);
         else {
-                char *i;
+                _cleanup_free_ char *i = NULL;
 
                 i = unit_name_to_prefix(u->id);
                 if (!i)
                         return NULL;
 
                 s = unit_name_replace_instance(name, i);
-                free(i);
         }
 
         if (!s)
@@ -1932,365 +1950,108 @@ char *unit_dbus_path(Unit *u) {
         return unit_dbus_path_from_name(u->id);
 }
 
-int unit_add_cgroup(Unit *u, CGroupBonding *b) {
+char *unit_default_cgroup_path(Unit *u) {
+        _cleanup_free_ char *escaped_instance = NULL, *slice = NULL;
         int r;
 
         assert(u);
-        assert(b);
-
-        assert(b->path);
-
-        if (!b->controller) {
-                b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER);
-                if (!b->controller)
-                        return log_oom();
-
-                b->ours = true;
-        }
-
-        /* Ensure this hasn't been added yet */
-        assert(!b->unit);
 
-        if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) {
-                CGroupBonding *l;
+        if (unit_has_name(u, SPECIAL_ROOT_SLICE))
+                return strdup(u->manager->cgroup_root);
 
-                l = hashmap_get(u->manager->cgroup_bondings, b->path);
-                LIST_PREPEND(CGroupBonding, by_path, l, b);
-
-                r = hashmap_replace(u->manager->cgroup_bondings, b->path, l);
-                if (r < 0) {
-                        LIST_REMOVE(CGroupBonding, by_path, l, b);
-                        return r;
-                }
+        if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) {
+                r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice);
+                if (r < 0)
+                        return NULL;
         }
 
-        LIST_PREPEND(CGroupBonding, by_unit, u->cgroup_bondings, b);
-        b->unit = u;
-
-        return 0;
-}
-
-char *unit_default_cgroup_path(Unit *u) {
-        assert(u);
+        escaped_instance = cg_escape(u->id);
+        if (!escaped_instance)
+                return NULL;
 
         if (u->instance) {
-                _cleanup_free_ char *t = NULL;
+                _cleanup_free_ char *t = NULL, *escaped_template = NULL;
 
                 t = unit_name_template(u->id);
                 if (!t)
                         return NULL;
 
-                return strjoin(u->manager->cgroup_hierarchy, "/", t, "/", u->instance, NULL);
+                escaped_template = cg_escape(t);
+                if (!escaped_template)
+                        return NULL;
+
+                return strjoin(u->manager->cgroup_root, "/",
+                               slice ? slice : "", slice ? "/" : "",
+                               escaped_template, "/", escaped_instance, NULL);
         } else
-                return strjoin(u->manager->cgroup_hierarchy, "/", u->id, NULL);
+                return strjoin(u->manager->cgroup_root, "/",
+                               slice ? slice : "", slice ? "/" : "",
+                               escaped_instance, NULL);
 }
 
-int unit_add_cgroup_from_text(Unit *u, const char *name, bool overwrite, CGroupBonding **ret) {
-        char *controller = NULL, *path = NULL;
-        CGroupBonding *b = NULL;
-        bool ours = false;
+int unit_add_default_slice(Unit *u) {
+        Unit *slice;
         int r;
 
-        assert(u);
-        assert(name);
-
-        r = cg_split_spec(name, &controller, &path);
-        if (r < 0)
-                return r;
-
-        if (!path) {
-                path = unit_default_cgroup_path(u);
-                ours = true;
-        }
-
-        if (!controller) {
-                controller = strdup(SYSTEMD_CGROUP_CONTROLLER);
-                ours = true;
-        }
-
-        if (!path || !controller) {
-                free(path);
-                free(controller);
-                return log_oom();
-        }
-
-        b = cgroup_bonding_find_list(u->cgroup_bondings, controller);
-        if (b) {
-                if (streq(path, b->path)) {
-                        free(path);
-                        free(controller);
-
-                        if (ret)
-                                *ret = b;
-                        return 0;
-                }
-
-                if (overwrite && !b->essential) {
-                        free(controller);
-
-                        free(b->path);
-                        b->path = path;
-
-                        b->ours = ours;
-                        b->realized = false;
-
-                        if (ret)
-                                *ret = b;
-
-                        return 1;
-                }
-
-                r = -EEXIST;
-                b = NULL;
-                goto fail;
-        }
-
-        b = new0(CGroupBonding, 1);
-        if (!b) {
-                r = -ENOMEM;
-                goto fail;
-        }
-
-        b->controller = controller;
-        b->path = path;
-        b->ours = ours;
-        b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER);
-
-        r = unit_add_cgroup(u, b);
-        if (r < 0)
-                goto fail;
-
-        if (ret)
-                *ret = b;
-
-        return 1;
-
-fail:
-        free(path);
-        free(controller);
-        free(b);
-
-        return r;
-}
-
-static int unit_add_one_default_cgroup(Unit *u, const char *controller) {
-        CGroupBonding *b = NULL;
-        int r = -ENOMEM;
-
         assert(u);
 
-        if (!controller)
-                controller = SYSTEMD_CGROUP_CONTROLLER;
-
-        if (cgroup_bonding_find_list(u->cgroup_bondings, controller))
+        if (UNIT_ISSET(u->slice))
                 return 0;
 
-        b = new0(CGroupBonding, 1);
-        if (!b)
-                return -ENOMEM;
-
-        b->controller = strdup(controller);
-        if (!b->controller)
-                goto fail;
-
-        b->path = unit_default_cgroup_path(u);
-        if (!b->path)
-                goto fail;
-
-        b->ours = true;
-        b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER);
-
-        r = unit_add_cgroup(u, b);
-        if (r < 0)
-                goto fail;
-
-        return 1;
-
-fail:
-        free(b->path);
-        free(b->controller);
-        free(b);
-
-        return r;
-}
-
-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
-         * otherwise. */
-
-        if (!u->manager->cgroup_hierarchy)
+        if (!unit_get_cgroup_context(u))
                 return 0;
 
-        r = unit_add_one_default_cgroup(u, NULL);
+        r = manager_load_unit(u->manager, u->manager->running_as == SYSTEMD_SYSTEM ? SPECIAL_SYSTEM_SLICE : SPECIAL_ROOT_SLICE, NULL, NULL, &slice);
         if (r < 0)
                 return r;
 
-        STRV_FOREACH(c, u->manager->default_controllers)
-                unit_add_one_default_cgroup(u, *c);
-
-        LIST_FOREACH(by_unit, a, u->cgroup_attributes)
-                unit_add_one_default_cgroup(u, a->controller);
-
+        unit_ref_set(&u->slice, slice);
         return 0;
 }
 
-CGroupBonding* unit_get_default_cgroup(Unit *u) {
-        assert(u);
-
-        return cgroup_bonding_find_list(u->cgroup_bondings, NULL);
-}
-
-int unit_add_cgroup_attribute(
-                Unit *u,
-                const CGroupSemantics *semantics,
-                const char *controller,
-                const char *name,
-                const char *value,
-                CGroupAttribute **ret) {
-
-        _cleanup_free_ char *c = NULL;
-        CGroupAttribute *a;
-        int r;
-
+const char *unit_slice_name(Unit *u) {
         assert(u);
-        assert(value);
-
-        if (semantics) {
-                /* Semantics always take precedence */
-                if (semantics->name)
-                        name = semantics->name;
-
-                if (semantics->controller)
-                        controller = semantics->controller;
-        }
-
-        if (!name)
-                return -EINVAL;
-
-        if (!controller) {
-                r = cg_controller_from_attr(name, &c);
-                if (r < 0)
-                        return -EINVAL;
-
-                controller = c;
-        }
-
-        if (!controller || streq(controller, SYSTEMD_CGROUP_CONTROLLER))
-                return -EINVAL;
-
-        if (!filename_is_safe(name))
-                return -EINVAL;
-
-        if (!filename_is_safe(controller))
-                return -EINVAL;
-
-        /* Check if this attribute already exists. Note that we will
-         * explicitly check for the value here too, as there are
-         * attributes which accept multiple values. */
-        a = cgroup_attribute_find_list(u->cgroup_attributes, controller, name);
-        if (a) {
-                if (streq(value, a->value)) {
-                        /* Exactly the same value is always OK, let's ignore this */
-                        if (ret)
-                                *ret = a;
-
-                        return 0;
-                }
-
-                if (semantics && !semantics->multiple) {
-                        char *v;
-
-                        /* If this is a single-item entry, we can
-                         * simply patch the existing attribute */
-
-                        v = strdup(value);
-                        if (!v)
-                                return -ENOMEM;
-
-                        free(a->value);
-                        a->value = v;
-
-                        if (ret)
-                                *ret = a;
-                        return 1;
-                }
-        }
-
-        a = new0(CGroupAttribute, 1);
-        if (!a)
-                return -ENOMEM;
-
-        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->semantics = semantics;
-        a->unit = u;
 
-        LIST_PREPEND(CGroupAttribute, by_unit, u->cgroup_attributes, a);
-
-        if (ret)
-                *ret = a;
+        if (!UNIT_ISSET(u->slice))
+                return NULL;
 
-        return 1;
+        return UNIT_DEREF(u->slice)->id;
 }
 
 int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
-        char *t;
+        _cleanup_free_ char *t = NULL;
         int r;
 
         assert(u);
         assert(type);
         assert(_found);
 
-        if (!(t = unit_name_change_suffix(u->id, type)))
+        t = unit_name_change_suffix(u->id, type);
+        if (!t)
                 return -ENOMEM;
 
         assert(!unit_has_name(u, t));
 
         r = manager_load_unit(u->manager, t, NULL, NULL, _found);
-        free(t);
-
         assert(r < 0 || *_found != u);
-
         return r;
 }
 
 int unit_get_related_unit(Unit *u, const char *type, Unit **_found) {
+        _cleanup_free_ char *t = NULL;
         Unit *found;
-        char *t;
 
         assert(u);
         assert(type);
         assert(_found);
 
-        if (!(t = unit_name_change_suffix(u->id, type)))
+        t = unit_name_change_suffix(u->id, type);
+        if (!t)
                 return -ENOMEM;
 
         assert(!unit_has_name(u, t));
 
         found = manager_get_unit(u->manager, t);
-        free(t);
-
         if (!found)
                 return -ENOENT;
 
@@ -2553,12 +2314,18 @@ int unit_coldplug(Unit *u) {
         return 0;
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-nonliteral"
 void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) {
         manager_status_printf(u->manager, false, status, unit_status_msg_format, unit_description(u));
 }
+#pragma GCC diagnostic pop
 
 bool unit_need_daemon_reload(Unit *u) {
+        _cleanup_strv_free_ char **t = NULL;
+        char **path;
         struct stat st;
+        unsigned loaded_cnt, current_cnt;
 
         assert(u);
 
@@ -2583,7 +2350,30 @@ bool unit_need_daemon_reload(Unit *u) {
                         return true;
         }
 
-        return false;
+        t = unit_find_dropin_paths(u);
+        loaded_cnt = strv_length(t);
+        current_cnt = strv_length(u->dropin_paths);
+
+        if (loaded_cnt == current_cnt) {
+                if (loaded_cnt == 0)
+                        return false;
+
+                if (strv_overlap(u->dropin_paths, t)) {
+                        STRV_FOREACH(path, u->dropin_paths) {
+                                zero(st);
+                                if (stat(*path, &st) < 0)
+                                        return true;
+
+                                if (u->dropin_mtime > 0 &&
+                                    timespec_load(&st.st_mtim) > u->dropin_mtime)
+                                        return true;
+                        }
+
+                        return false;
+                } else
+                        return true;
+        } else
+                return true;
 }
 
 void unit_reset_failed(Unit *u) {
@@ -2602,7 +2392,19 @@ Unit *unit_following(Unit *u) {
         return NULL;
 }
 
-bool unit_pending_inactive(Unit *u) {
+bool unit_stop_pending(Unit *u) {
+        assert(u);
+
+        /* This call does check the current state of the unit. It's
+         * hence useful to be called from state change calls of the
+         * unit itself, where the state isn't updated yet. This is
+         * different from unit_inactive_or_pending() which checks both
+         * the current state and for a queued job. */
+
+        return u->job && u->job->type == JOB_STOP;
+}
+
+bool unit_inactive_or_pending(Unit *u) {
         assert(u);
 
         /* Returns true if the unit is inactive or going down */
@@ -2610,13 +2412,13 @@ bool unit_pending_inactive(Unit *u) {
         if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)))
                 return true;
 
-        if (u->job && u->job->type == JOB_STOP)
+        if (unit_stop_pending(u))
                 return true;
 
         return false;
 }
 
-bool unit_pending_active(Unit *u) {
+bool unit_active_or_pending(Unit *u) {
         assert(u);
 
         /* Returns true if the unit is active or going up */
@@ -2645,7 +2447,14 @@ int unit_kill(Unit *u, KillWho w, int signo, DBusError *error) {
         return UNIT_VTABLE(u)->kill(u, w, signo, error);
 }
 
-int unit_kill_common(Unit *u, KillWho who, int signo, pid_t main_pid, pid_t control_pid, DBusError *error) {
+int unit_kill_common(
+                Unit *u,
+                KillWho who,
+                int signo,
+                pid_t main_pid,
+                pid_t control_pid,
+                DBusError *error) {
+
         int r = 0;
 
         if (who == KILL_MAIN && main_pid <= 0) {
@@ -2674,7 +2483,7 @@ int unit_kill_common(Unit *u, KillWho who, int signo, pid_t main_pid, pid_t cont
                         if (kill(main_pid, signo) < 0)
                                 r = -errno;
 
-        if (who == KILL_ALL) {
+        if (who == KILL_ALL && u->cgroup_path) {
                 _cleanup_set_free_ Set *pid_set = NULL;
                 int q;
 
@@ -2695,7 +2504,7 @@ int unit_kill_common(Unit *u, KillWho who, int signo, pid_t main_pid, pid_t cont
                                 return q;
                 }
 
-                q = cgroup_bonding_kill_list(u->cgroup_bondings, signo, false, false, pid_set, NULL);
+                q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set);
                 if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT)
                         r = q;
         }
@@ -2794,7 +2603,6 @@ int unit_exec_context_defaults(Unit *u, ExecContext *c) {
         assert(c);
 
         /* This only copies in the ones that need memory */
-
         for (i = 0; i < RLIMIT_NLIMITS; i++)
                 if (u->manager->rlimit[i] && !c->rlimit[i]) {
                         c->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1);
@@ -2824,7 +2632,17 @@ ExecContext *unit_get_exec_context(Unit *u) {
         return (ExecContext*) ((uint8_t*) u + offset);
 }
 
-static int drop_in_file(Unit *u, bool runtime, const char *name, char **_p, char **_q) {
+CGroupContext *unit_get_cgroup_context(Unit *u) {
+        size_t offset;
+
+        offset = UNIT_VTABLE(u)->cgroup_context_offset;
+        if (offset <= 0)
+                return NULL;
+
+        return (CGroupContext*) ((uint8_t*) u + offset);
+}
+
+static int drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, char **_p, char **_q) {
         char *p, *q;
         int r;
 
@@ -2832,8 +2650,9 @@ static int drop_in_file(Unit *u, bool runtime, const char *name, char **_p, char
         assert(name);
         assert(_p);
         assert(_q);
+        assert(mode & (UNIT_PERSISTENT|UNIT_RUNTIME));
 
-        if (u->manager->running_as == SYSTEMD_USER && runtime)
+        if (u->manager->running_as == SYSTEMD_USER && !(mode & UNIT_PERSISTENT))
                 return -ENOTSUP;
 
         if (!filename_is_safe(name))
@@ -2849,10 +2668,10 @@ static int drop_in_file(Unit *u, bool runtime, const char *name, char **_p, char
                         return -ENOENT;
 
                 p = strjoin(c, "/", u->id, ".d", NULL);
-        } else  if (runtime)
-                p = strjoin("/run/systemd/system/", u->id, ".d", NULL);
-        else
+        } else  if (mode & UNIT_PERSISTENT)
                 p = strjoin("/etc/systemd/system/", u->id, ".d", NULL);
+        else
+                p = strjoin("/run/systemd/system/", u->id, ".d", NULL);
         if (!p)
                 return -ENOMEM;
 
@@ -2867,27 +2686,52 @@ static int drop_in_file(Unit *u, bool runtime, const char *name, char **_p, char
         return 0;
 }
 
-int unit_write_drop_in(Unit *u, bool runtime, const char *name, const char *data) {
+int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) {
         _cleanup_free_ char *p = NULL, *q = NULL;
         int r;
 
         assert(u);
+        assert(name);
+        assert(data);
 
-        r = drop_in_file(u, runtime, name, &p, &q);
+        if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)))
+                return 0;
+
+        r = drop_in_file(u, mode, name, &p, &q);
         if (r < 0)
                 return r;
 
         mkdir_p(p, 0755);
-        return write_one_line_file_atomic_label(q, data);
+        return write_string_file_atomic_label(q, data);
+}
+
+int unit_write_drop_in_private_section(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) {
+        _cleanup_free_ char *ndata = NULL;
+
+        assert(u);
+        assert(name);
+        assert(data);
+
+        if (!UNIT_VTABLE(u)->private_section)
+                return -EINVAL;
+
+        ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL);
+        if (!ndata)
+                return -ENOMEM;
+
+        return unit_write_drop_in(u, mode, name, ndata);
 }
 
-int unit_remove_drop_in(Unit *u, bool runtime, const char *name) {
+int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) {
         _cleanup_free_ char *p = NULL, *q = NULL;
         int r;
 
         assert(u);
 
-        r = drop_in_file(u, runtime, name, &p, &q);
+        if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)))
+                return 0;
+
+        r = drop_in_file(u, mode, name, &p, &q);
         if (unlink(q) < 0)
                 r = -errno;
         else
@@ -2942,7 +2786,7 @@ int unit_kill_context(
                         wait_for_exit = true;
         }
 
-        if (c->kill_mode == KILL_CONTROL_GROUP) {
+        if (c->kill_mode == KILL_CONTROL_GROUP && u->cgroup_path) {
                 _cleanup_set_free_ Set *pid_set = NULL;
 
                 pid_set = set_new(trivial_hash_func, trivial_compare_func);
@@ -2962,7 +2806,7 @@ int unit_kill_context(
                                 return r;
                 }
 
-                r = cgroup_bonding_kill_list(u->cgroup_bondings, sig, true, false, pid_set, NULL);
+                r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set);
                 if (r < 0) {
                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
                                 log_warning_unit(u->id, "Failed to kill control group: %s", strerror(-r));