X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Funit.c;h=6427f9137af3085944ddbcec69fc499d22b4e8af;hp=bfde08d68cf429ece1686ad5db35c750d915cbb5;hb=6294b8a92db8579210d4fc9ce74097a15005b3e6;hpb=a8833944647bfd10e43569646be954db5cbac54e

diff --git a/src/core/unit.c b/src/core/unit.c
index bfde08d68..6427f9137 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -29,8 +29,8 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
-#include "systemd/sd-id128.h"
-#include "systemd/sd-messages.h"
+#include "sd-id128.h"
+#include "sd-messages.h"
 #include "set.h"
 #include "unit.h"
 #include "macro.h"
@@ -48,17 +48,20 @@
 #include "label.h"
 #include "fileio-label.h"
 #include "bus-errors.h"
+#include "dbus.h"
+#include "execute.h"
 
 const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = {
         [UNIT_SERVICE] = &service_vtable,
-        [UNIT_TIMER] = &timer_vtable,
         [UNIT_SOCKET] = &socket_vtable,
+        [UNIT_BUSNAME] = &busname_vtable,
         [UNIT_TARGET] = &target_vtable,
+        [UNIT_SNAPSHOT] = &snapshot_vtable,
         [UNIT_DEVICE] = &device_vtable,
         [UNIT_MOUNT] = &mount_vtable,
         [UNIT_AUTOMOUNT] = &automount_vtable,
-        [UNIT_SNAPSHOT] = &snapshot_vtable,
         [UNIT_SWAP] = &swap_vtable,
+        [UNIT_TIMER] = &timer_vtable,
         [UNIT_PATH] = &path_vtable,
         [UNIT_SLICE] = &slice_vtable,
         [UNIT_SCOPE] = &scope_vtable
@@ -85,6 +88,7 @@ Unit *unit_new(Manager *m, size_t size) {
         u->deserialized_job = _JOB_TYPE_INVALID;
         u->default_dependencies = true;
         u->unit_file_state = _UNIT_FILE_STATE_INVALID;
+        u->on_failure_job_mode = JOB_REPLACE;
 
         return u;
 }
@@ -115,7 +119,7 @@ int unit_add_name(Unit *u, const char *text) {
         if (!s)
                 return -ENOMEM;
 
-        if (!unit_name_is_valid(s, false)) {
+        if (!unit_name_is_valid(s, TEMPLATE_INVALID)) {
                 r = -EINVAL;
                 goto fail;
         }
@@ -127,7 +131,8 @@ int unit_add_name(Unit *u, const char *text) {
                 goto fail;
         }
 
-        if ((r = unit_name_to_instance(s, &i)) < 0)
+        r = unit_name_to_instance(s, &i);
+        if (r < 0)
                 goto fail;
 
         if (i && unit_vtable[t]->no_instances) {
@@ -154,13 +159,15 @@ int unit_add_name(Unit *u, const char *text) {
                 goto fail;
         }
 
-        if ((r = set_put(u->names, s)) < 0) {
+        r = set_put(u->names, s);
+        if (r < 0) {
                 if (r == -EEXIST)
                         r = 0;
                 goto fail;
         }
 
-        if ((r = hashmap_put(u->manager->units, s, u)) < 0) {
+        r = hashmap_put(u->manager->units, s, u);
+        if (r < 0) {
                 set_remove(u->names, s);
                 goto fail;
         }
@@ -171,7 +178,7 @@ int unit_add_name(Unit *u, const char *text) {
                 u->id = s;
                 u->instance = i;
 
-                LIST_PREPEND(Unit, units_by_type, u->manager->units_by_type[t], u);
+                LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u);
 
                 if (UNIT_VTABLE(u)->init)
                         UNIT_VTABLE(u)->init(u);
@@ -189,7 +196,8 @@ fail:
 }
 
 int unit_choose_id(Unit *u, const char *name) {
-        char *s, *t = NULL, *i;
+        char *s, *i;
+        _cleanup_free_ char *t = NULL;
         int r;
 
         assert(u);
@@ -200,7 +208,8 @@ int unit_choose_id(Unit *u, const char *name) {
                 if (!u->instance)
                         return -EINVAL;
 
-                if (!(t = unit_name_replace_instance(name, u->instance)))
+                t = unit_name_replace_instance(name, u->instance);
+                if (!t)
                         return -ENOMEM;
 
                 name = t;
@@ -208,12 +217,12 @@ int unit_choose_id(Unit *u, const char *name) {
 
         /* Selects one of the names of this unit as the id */
         s = set_get(u->names, (char*) name);
-        free(t);
 
         if (!s)
                 return -ENOENT;
 
-        if ((r = unit_name_to_instance(s, &i)) < 0)
+        r = unit_name_to_instance(s, &i);
+        if (r < 0)
                 return r;
 
         u->id = s;
@@ -284,7 +293,7 @@ void unit_add_to_load_queue(Unit *u) {
         if (u->load_state != UNIT_STUB || u->in_load_queue)
                 return;
 
-        LIST_PREPEND(Unit, load_queue, u->manager->load_queue, u);
+        LIST_PREPEND(load_queue, u->manager->load_queue, u);
         u->in_load_queue = true;
 }
 
@@ -294,7 +303,7 @@ void unit_add_to_cleanup_queue(Unit *u) {
         if (u->in_cleanup_queue)
                 return;
 
-        LIST_PREPEND(Unit, cleanup_queue, u->manager->cleanup_queue, u);
+        LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u);
         u->in_cleanup_queue = true;
 }
 
@@ -307,7 +316,7 @@ void unit_add_to_gc_queue(Unit *u) {
         if (unit_check_gc(u))
                 return;
 
-        LIST_PREPEND(Unit, gc_queue, u->manager->gc_queue, u);
+        LIST_PREPEND(gc_queue, u->manager->gc_queue, u);
         u->in_gc_queue = true;
 
         u->manager->n_in_gc_queue ++;
@@ -321,12 +330,12 @@ void unit_add_to_dbus_queue(Unit *u) {
                 return;
 
         /* Shortcut things if nobody cares */
-        if (!bus_has_subscriber(u->manager)) {
+        if (set_isempty(u->manager->subscribed)) {
                 u->sent_dbus_new_signal = true;
                 return;
         }
 
-        LIST_PREPEND(Unit, dbus_queue, u->manager->dbus_unit_queue, u);
+        LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u);
         u->in_dbus_queue = true;
 }
 
@@ -374,6 +383,34 @@ static void unit_remove_transient(Unit *u) {
         }
 }
 
+static void unit_free_requires_mounts_for(Unit *u) {
+        char **j;
+
+        STRV_FOREACH(j, u->requires_mounts_for) {
+                char s[strlen(*j) + 1];
+
+                PATH_FOREACH_PREFIX_MORE(s, *j) {
+                        char *y;
+                        Set *x;
+
+                        x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y);
+                        if (!x)
+                                continue;
+
+                        set_remove(x, u);
+
+                        if (set_isempty(x)) {
+                                hashmap_remove(u->manager->units_requiring_mounts_for, y);
+                                free(y);
+                                set_free(x);
+                        }
+                }
+        }
+
+        strv_free(u->requires_mounts_for);
+        u->requires_mounts_for = NULL;
+}
+
 void unit_free(Unit *u) {
         UnitDependency d;
         Iterator i;
@@ -390,6 +427,8 @@ void unit_free(Unit *u) {
                 if (UNIT_VTABLE(u)->done)
                         UNIT_VTABLE(u)->done(u);
 
+        unit_free_requires_mounts_for(u);
+
         SET_FOREACH(t, u->names, i)
                 hashmap_remove_value(u->manager->units, t, u);
 
@@ -408,30 +447,25 @@ void unit_free(Unit *u) {
         for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
                 bidi_set_free(u, u->dependencies[d]);
 
-        if (u->requires_mounts_for) {
-                LIST_REMOVE(Unit, has_requires_mounts_for, u->manager->has_requires_mounts_for, u);
-                strv_free(u->requires_mounts_for);
-        }
-
         if (u->type != _UNIT_TYPE_INVALID)
-                LIST_REMOVE(Unit, units_by_type, u->manager->units_by_type[u->type], u);
+                LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u);
 
         if (u->in_load_queue)
-                LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u);
+                LIST_REMOVE(load_queue, u->manager->load_queue, u);
 
         if (u->in_dbus_queue)
-                LIST_REMOVE(Unit, dbus_queue, u->manager->dbus_unit_queue, u);
+                LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u);
 
         if (u->in_cleanup_queue)
-                LIST_REMOVE(Unit, cleanup_queue, u->manager->cleanup_queue, u);
+                LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u);
 
         if (u->in_gc_queue) {
-                LIST_REMOVE(Unit, gc_queue, u->manager->gc_queue, u);
+                LIST_REMOVE(gc_queue, u->manager->gc_queue, u);
                 u->manager->n_in_gc_queue--;
         }
 
         if (u->in_cgroup_queue)
-                LIST_REMOVE(Unit, cgroup_queue, u->manager->cgroup_queue, u);
+                LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u);
 
         if (u->cgroup_path) {
                 hashmap_remove(u->manager->cgroup_unit, u->cgroup_path);
@@ -521,14 +555,13 @@ static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) {
         SET_FOREACH(back, other->dependencies[d], i) {
                 UnitDependency k;
 
-                for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++)
-                        if ((r = set_remove_and_put(back->dependencies[k], other, u)) < 0) {
-
-                                if (r == -EEXIST)
-                                        set_remove(back->dependencies[k], other);
-                                else
-                                        assert(r == -ENOENT);
-                        }
+                for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) {
+                        r = set_remove_and_put(back->dependencies[k], other, u);
+                        if (r == -EEXIST)
+                                set_remove(back->dependencies[k], other);
+                        else
+                                assert(r >= 0 || r == -ENOENT);
+                }
         }
 
         complete_move(&u->dependencies[d], &other->dependencies[d]);
@@ -598,7 +631,7 @@ int unit_merge(Unit *u, Unit *other) {
 int unit_merge_by_name(Unit *u, const char *name) {
         Unit *other;
         int r;
-        char *s = NULL;
+        _cleanup_free_ char *s = NULL;
 
         assert(u);
         assert(name);
@@ -607,7 +640,8 @@ int unit_merge_by_name(Unit *u, const char *name) {
                 if (!u->instance)
                         return -EINVAL;
 
-                if (!(s = unit_name_replace_instance(name, u->instance)))
+                s = unit_name_replace_instance(name, u->instance);
+                if (!s)
                         return -ENOMEM;
 
                 name = s;
@@ -619,7 +653,6 @@ int unit_merge_by_name(Unit *u, const char *name) {
         else
                 r = unit_merge(u, other);
 
-        free(s);
         return r;
 }
 
@@ -638,6 +671,18 @@ int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
         assert(u);
         assert(c);
 
+        if (c->working_directory) {
+                r = unit_require_mounts_for(u, c->working_directory);
+                if (r < 0)
+                        return r;
+        }
+
+        if (c->root_directory) {
+                r = unit_require_mounts_for(u, c->root_directory);
+                if (r < 0)
+                        return r;
+        }
+
         if (c->std_output != EXEC_OUTPUT_KMSG &&
             c->std_output != EXEC_OUTPUT_SYSLOG &&
             c->std_output != EXEC_OUTPUT_JOURNAL &&
@@ -677,7 +722,7 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
         char *t, **j;
         UnitDependency d;
         Iterator i;
-        char *p2;
+        _cleanup_free_ char *p2 = NULL;
         const char *prefix2;
         char
                 timestamp1[FORMAT_TIMESTAMP_MAX],
@@ -686,6 +731,8 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                 timestamp4[FORMAT_TIMESTAMP_MAX],
                 timespan[FORMAT_TIMESPAN_MAX];
         Unit *following;
+        _cleanup_set_free_ Set *following_set = NULL;
+        int r;
 
         assert(u);
         assert(u->type >= 0);
@@ -711,7 +758,8 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                 "%s\tSlice: %s\n"
                 "%s\tCGroup: %s\n"
                 "%s\tCGroup realized: %s\n"
-                "%s\tCGroup mask: 0x%x\n",
+                "%s\tCGroup mask: 0x%x\n"
+                "%s\tCGroup members mask: 0x%x\n",
                 prefix, u->id,
                 prefix, unit_description(u),
                 prefix, strna(u->instance),
@@ -727,7 +775,8 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                 prefix, strna(unit_slice_name(u)),
                 prefix, strna(u->cgroup_path),
                 prefix, yes_no(u->cgroup_realized),
-                prefix, u->cgroup_mask);
+                prefix, u->cgroup_mask,
+                prefix, u->cgroup_members_mask);
 
         SET_FOREACH(t, u->names, i)
                 fprintf(f, "%s\tName: %s\n", prefix, t);
@@ -735,9 +784,18 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
         STRV_FOREACH(j, u->documentation)
                 fprintf(f, "%s\tDocumentation: %s\n", prefix, *j);
 
-        if ((following = unit_following(u)))
+        following = unit_following(u);
+        if (following)
                 fprintf(f, "%s\tFollowing: %s\n", prefix, following->id);
 
+        r = unit_following_set(u, &following_set);
+        if (r >= 0) {
+                Unit *other;
+
+                SET_FOREACH(other, following_set, i)
+                        fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id);
+        }
+
         if (u->fragment_path)
                 fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path);
 
@@ -783,14 +841,14 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
                         "%s\tRefuseManualStart: %s\n"
                         "%s\tRefuseManualStop: %s\n"
                         "%s\tDefaultDependencies: %s\n"
-                        "%s\tOnFailureIsolate: %s\n"
+                        "%s\tOnFailureJobMode: %s\n"
                         "%s\tIgnoreOnIsolate: %s\n"
                         "%s\tIgnoreOnSnapshot: %s\n",
                         prefix, yes_no(u->stop_when_unneeded),
                         prefix, yes_no(u->refuse_manual_start),
                         prefix, yes_no(u->refuse_manual_stop),
                         prefix, yes_no(u->default_dependencies),
-                        prefix, yes_no(u->on_failure_isolate),
+                        prefix, job_mode_to_string(u->on_failure_job_mode),
                         prefix, yes_no(u->ignore_on_isolate),
                         prefix, yes_no(u->ignore_on_snapshot));
 
@@ -811,7 +869,6 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
         if (u->nop_job)
                 job_dump(u->nop_job, f, prefix2);
 
-        free(p2);
 }
 
 /* Common implementation for multiple backends */
@@ -820,7 +877,7 @@ int unit_load_fragment_and_dropin(Unit *u) {
 
         assert(u);
 
-        /* Load a .service file */
+        /* Load a .{service,socket,...} file */
         r = unit_load_fragment(u);
         if (r < 0)
                 return r;
@@ -923,13 +980,51 @@ static int unit_add_default_dependencies(Unit *u) {
         return 0;
 }
 
+static int unit_add_mount_links(Unit *u) {
+        char **i;
+        int r;
+
+        assert(u);
+
+        STRV_FOREACH(i, u->requires_mounts_for) {
+                char prefix[strlen(*i) + 1];
+
+                PATH_FOREACH_PREFIX_MORE(prefix, *i) {
+                        Unit *m;
+
+                        r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m);
+                        if (r < 0)
+                                return r;
+                        if (r == 0)
+                                continue;
+                        if (m == u)
+                                continue;
+
+                        if (m->load_state != UNIT_LOADED)
+                                continue;
+
+                        r = unit_add_dependency(u, UNIT_AFTER, m, true);
+                        if (r < 0)
+                                return r;
+
+                        if (m->fragment_path) {
+                                r = unit_add_dependency(u, UNIT_REQUIRES, m, true);
+                                if (r < 0)
+                                        return r;
+                        }
+                }
+        }
+
+        return 0;
+}
+
 int unit_load(Unit *u) {
         int r;
 
         assert(u);
 
         if (u->in_load_queue) {
-                LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u);
+                LIST_REMOVE(load_queue, u->manager->load_queue, u);
                 u->in_load_queue = false;
         }
 
@@ -958,15 +1053,17 @@ int unit_load(Unit *u) {
                                 goto fail;
                 }
 
+                unit_update_member_masks(u);
+
                 r = unit_add_mount_links(u);
                 if (r < 0)
                         goto fail;
 
-                if (u->on_failure_isolate &&
+                if (u->on_failure_job_mode == JOB_ISOLATE &&
                     set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) {
 
                         log_error_unit(u->id,
-                                       "More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.", u->id);
+                                       "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id);
 
                         r = -EINVAL;
                         goto fail;
@@ -992,11 +1089,11 @@ fail:
         return r;
 }
 
-bool unit_condition_test(Unit *u) {
+static bool unit_condition_test(Unit *u) {
         assert(u);
 
         dual_timestamp_get(&u->condition_timestamp);
-        u->condition_result = condition_test_list(u->conditions);
+        u->condition_result = condition_test_list(u->id, u->conditions);
 
         return u->condition_result;
 }
@@ -1040,6 +1137,8 @@ _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, Job
         return NULL;
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-nonliteral"
 static void unit_status_print_starting_stopping(Unit *u, JobType t) {
         const char *format;
 
@@ -1054,6 +1153,7 @@ static void unit_status_print_starting_stopping(Unit *u, JobType t) {
 
         unit_status_printf(u, "", format);
 }
+#pragma GCC diagnostic pop
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
@@ -1125,7 +1225,8 @@ int unit_start(Unit *u) {
         }
 
         /* Forward to the main object, if we aren't it. */
-        if ((following = unit_following(u))) {
+        following = unit_following(u);
+        if (following) {
                 log_debug_unit(u->id, "Redirecting start request from %s to %s.",
                                u->id, following->id);
                 return unit_start(following);
@@ -1215,10 +1316,14 @@ int unit_reload(Unit *u) {
         if (state == UNIT_RELOADING)
                 return -EALREADY;
 
-        if (state != UNIT_ACTIVE)
+        if (state != UNIT_ACTIVE) {
+                log_warning_unit(u->id, "Unit %s cannot be reloaded because it is inactive.",
+                                 u->id);
                 return -ENOEXEC;
+        }
 
-        if ((following = unit_following(u))) {
+        following = unit_following(u);
+        if (following) {
                 log_debug_unit(u->id, "Redirecting reload request from %s to %s.",
                                u->id, following->id);
                 return unit_reload(following);
@@ -1370,7 +1475,7 @@ void unit_start_on_failure(Unit *u) {
         SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) {
                 int r;
 
-                r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL);
+                r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL);
                 if (r < 0)
                         log_error_unit(u->id, "Failed to enqueue OnFailure= job: %s", strerror(-r));
         }
@@ -1422,13 +1527,20 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
         if (UNIT_IS_INACTIVE_OR_FAILED(ns))
                 unit_destroy_cgroup(u);
 
+        /* Note that this doesn't apply to RemainAfterExit services exiting
+         * sucessfully, since there's no change of state in that case. Which is
+         * why it is handled in service_set_state() */
         if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) {
                 ExecContext *ec = unit_get_exec_context(u);
                 if (ec && exec_context_may_touch_console(ec)) {
-                        if (UNIT_IS_INACTIVE_OR_FAILED(ns))
-                                m->n_on_console--;
-                        else
-                                m->n_on_console++;
+                        if (UNIT_IS_INACTIVE_OR_FAILED(ns)) {
+                                m->n_on_console --;
+
+                                if (m->n_on_console == 0)
+                                        /* unset no_console_output flag, since the console is free */
+                                        m->no_console_output = false;
+                        } else
+                                m->n_on_console ++;
                 }
         }
 
@@ -1583,46 +1695,6 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_su
         unit_add_to_gc_queue(u);
 }
 
-int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
-        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));
-
-        if (epoll_ctl(u->manager->epoll_fd,
-                      w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD,
-                      fd,
-                      &ev) < 0)
-                return -errno;
-
-        w->fd = fd;
-        w->type = WATCH_FD;
-        w->data.unit = u;
-
-        return 0;
-}
-
-void unit_unwatch_fd(Unit *u, Watch *w) {
-        assert(u);
-        assert(w);
-
-        if (w->type == WATCH_INVALID)
-                return;
-
-        assert(w->type == WATCH_FD);
-        assert(w->data.unit == u);
-        assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
-
-        w->fd = -1;
-        w->type = WATCH_INVALID;
-        w->data.unit = NULL;
-}
-
 int unit_watch_pid(Unit *u, pid_t pid) {
         assert(u);
         assert(pid >= 1);
@@ -1640,90 +1712,6 @@ void unit_unwatch_pid(Unit *u, pid_t pid) {
         hashmap_remove_value(u->manager->watch_pids, LONG_TO_PTR(pid), u);
 }
 
-int unit_watch_timer(Unit *u, clockid_t clock_id, bool relative, usec_t usec, Watch *w) {
-        struct itimerspec its = {};
-        int flags, fd;
-        bool ours;
-
-        assert(u);
-        assert(w);
-        assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u));
-
-        /* This will try to reuse the old timer if there is one */
-
-        if (w->type == WATCH_UNIT_TIMER) {
-                assert(w->data.unit == u);
-                assert(w->fd >= 0);
-
-                ours = false;
-                fd = w->fd;
-        } else if (w->type == WATCH_INVALID) {
-
-                ours = true;
-                fd = timerfd_create(clock_id, TFD_NONBLOCK|TFD_CLOEXEC);
-                if (fd < 0)
-                        return -errno;
-        } else
-                assert_not_reached("Invalid watch type");
-
-        if (usec <= 0) {
-                /* Set absolute time in the past, but not 0, since we
-                 * don't want to disarm the timer */
-                its.it_value.tv_sec = 0;
-                its.it_value.tv_nsec = 1;
-
-                flags = TFD_TIMER_ABSTIME;
-        } else {
-                timespec_store(&its.it_value, usec);
-                flags = relative ? 0 : TFD_TIMER_ABSTIME;
-        }
-
-        /* This will also flush the elapse counter */
-        if (timerfd_settime(fd, flags, &its, NULL) < 0)
-                goto fail;
-
-        if (w->type == WATCH_INVALID) {
-                struct epoll_event ev = {
-                        .data.ptr = w,
-                        .events = EPOLLIN,
-                };
-
-                if (epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0)
-                        goto fail;
-        }
-
-        w->type = WATCH_UNIT_TIMER;
-        w->fd = fd;
-        w->data.unit = u;
-
-        return 0;
-
-fail:
-        if (ours)
-                close_nointr_nofail(fd);
-
-        return -errno;
-}
-
-void unit_unwatch_timer(Unit *u, Watch *w) {
-        assert(u);
-        assert(w);
-
-        if (w->type == WATCH_INVALID)
-                return;
-
-        assert(w->type == WATCH_UNIT_TIMER);
-        assert(w->data.unit == u);
-        assert(w->fd >= 0);
-
-        assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
-        close_nointr_nofail(w->fd);
-
-        w->fd = -1;
-        w->type = WATCH_INVALID;
-        w->data.unit = NULL;
-}
-
 bool unit_job_is_applicable(Unit *u, JobType j) {
         assert(u);
         assert(j >= 0 && j < _JOB_TYPE_MAX);
@@ -1777,6 +1765,7 @@ int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_referen
                 [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS,
                 [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM,
                 [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO,
+                [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF,
         };
         int r, q = 0, v = 0, w = 0;
 
@@ -1792,34 +1781,47 @@ int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_referen
         if (u == other)
                 return 0;
 
-        if ((r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func)) < 0)
+        r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func);
+        if (r < 0)
                 return r;
 
-        if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
-                if ((r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0)
+        if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) {
+                r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func);
+                if (r < 0)
                         return r;
+        }
 
-        if (add_reference)
-                if ((r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 ||
-                    (r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0)
+        if (add_reference) {
+                r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func);
+                if (r < 0)
                         return r;
 
-        if ((q = set_put(u->dependencies[d], other)) < 0)
+                r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func);
+                if (r < 0)
+                        return r;
+        }
+
+        q = set_put(u->dependencies[d], other);
+        if (q < 0)
                 return q;
 
-        if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
-                if ((v = set_put(other->dependencies[inverse_table[d]], u)) < 0) {
+        if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) {
+                v = set_put(other->dependencies[inverse_table[d]], u);
+                if (v < 0) {
                         r = v;
                         goto fail;
                 }
+        }
 
         if (add_reference) {
-                if ((w = set_put(u->dependencies[UNIT_REFERENCES], other)) < 0) {
+                w = set_put(u->dependencies[UNIT_REFERENCES], other);
+                if (w < 0) {
                         r = w;
                         goto fail;
                 }
 
-                if ((r = set_put(other->dependencies[UNIT_REFERENCED_BY], u)) < 0)
+                r = set_put(other->dependencies[UNIT_REFERENCED_BY], u);
+                if (r < 0)
                         goto fail;
         }
 
@@ -1861,7 +1863,7 @@ static const char *resolve_template(Unit *u, const char *name, const char*path,
         assert(p);
 
         if (!name)
-                name = path_get_file_name(path);
+                name = basename(path);
 
         if (!unit_name_is_template(name)) {
                 *p = NULL;
@@ -1909,7 +1911,7 @@ int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, con
 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;
+        _cleanup_free_ char *s = NULL;
 
         assert(u);
         assert(name || path);
@@ -1918,19 +1920,17 @@ int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency
                 return -ENOMEM;
 
         if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
-                goto finish;
+                return r;
 
         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;
-        char *s;
+        _cleanup_free_ char *s = NULL;
 
         assert(u);
         assert(name || path);
@@ -1939,19 +1939,17 @@ int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *n
                 return -ENOMEM;
 
         if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
-                goto finish;
+                return r;
 
         r = unit_add_dependency(other, d, u, add_reference);
 
-finish:
-        free(s);
         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;
+        _cleanup_free_ char *s = NULL;
 
         assert(u);
         assert(name || path);
@@ -1960,13 +1958,11 @@ int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDep
                 return -ENOMEM;
 
         if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
-                goto finish;
+                return r;
 
         if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0)
-                goto finish;
+                return r;
 
-finish:
-        free(s);
         return r;
 }
 
@@ -1991,7 +1987,7 @@ char *unit_dbus_path(Unit *u) {
 }
 
 char *unit_default_cgroup_path(Unit *u) {
-        _cleanup_free_ char *escaped_instance = NULL, *slice = NULL;
+        _cleanup_free_ char *escaped = NULL, *slice = NULL;
         int r;
 
         assert(u);
@@ -2005,28 +2001,14 @@ char *unit_default_cgroup_path(Unit *u) {
                         return NULL;
         }
 
-        escaped_instance = cg_escape(u->id);
-        if (!escaped_instance)
+        escaped = cg_escape(u->id);
+        if (!escaped)
                 return NULL;
 
-        if (u->instance) {
-                _cleanup_free_ char *t = NULL, *escaped_template = NULL;
-
-                t = unit_name_template(u->id);
-                if (!t)
-                        return 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_root, "/",
-                               slice ? slice : "", slice ? "/" : "",
-                               escaped_instance, NULL);
+        if (slice)
+                return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL);
+        else
+                return strjoin(u->manager->cgroup_root, "/", escaped, NULL);
 }
 
 int unit_add_default_slice(Unit *u) {
@@ -2045,7 +2027,7 @@ int unit_add_default_slice(Unit *u) {
 
         if (u->instance) {
                 _cleanup_free_ char *prefix = NULL, *escaped = NULL;
-                        ;
+
                 /* Implicitly place all instantiated units in their
                  * own per-template slice */
 
@@ -2110,28 +2092,6 @@ int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
         return r;
 }
 
-int unit_get_related_unit(Unit *u, const char *type, Unit **_found) {
-        _cleanup_free_ char *t = NULL;
-        Unit *found;
-
-        assert(u);
-        assert(type);
-        assert(_found);
-
-        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);
-        if (!found)
-                return -ENOENT;
-
-        *_found = found;
-        return 0;
-}
-
 int unit_watch_bus_name(Unit *u, const char *name) {
         assert(u);
         assert(name);
@@ -2156,6 +2116,7 @@ bool unit_can_serialize(Unit *u) {
 }
 
 int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) {
+        ExecRuntime *rt;
         int r;
 
         assert(u);
@@ -2169,17 +2130,11 @@ int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) {
         if (r < 0)
                 return r;
 
-
-        if (serialize_jobs) {
-                if (u->job) {
-                        fprintf(f, "job\n");
-                        job_serialize(u->job, f, fds);
-                }
-
-                if (u->nop_job) {
-                        fprintf(f, "job\n");
-                        job_serialize(u->nop_job, f, fds);
-                }
+        rt = unit_get_exec_runtime(u);
+        if (rt) {
+                r = exec_runtime_serialize(rt, u, f, fds);
+                if (r < 0)
+                        return r;
         }
 
         dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp);
@@ -2196,6 +2151,18 @@ int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) {
         if (u->cgroup_path)
                 unit_serialize_item(u, f, "cgroup", u->cgroup_path);
 
+        if (serialize_jobs) {
+                if (u->job) {
+                        fprintf(f, "job\n");
+                        job_serialize(u->job, f, fds);
+                }
+
+                if (u->nop_job) {
+                        fprintf(f, "job\n");
+                        job_serialize(u->nop_job, f, fds);
+                }
+        }
+
         /* End marker */
         fputc('\n', f);
         return 0;
@@ -2229,6 +2196,8 @@ void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) {
 }
 
 int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
+        size_t offset;
+        ExecRuntime **rt = NULL;
         int r;
 
         assert(u);
@@ -2238,6 +2207,10 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
         if (!unit_can_serialize(u))
                 return 0;
 
+        offset = UNIT_VTABLE(u)->exec_runtime_offset;
+        if (offset > 0)
+                rt = (ExecRuntime**) ((uint8_t*) u + offset);
+
         for (;;) {
                 char line[LINE_MAX], *l, *v;
                 size_t k;
@@ -2340,16 +2313,24 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
                         char *s;
 
                         s = strdup(v);
-                        if (!v)
+                        if (!s)
                                 return -ENOMEM;
 
                         free(u->cgroup_path);
                         u->cgroup_path = s;
 
-                        hashmap_put(u->manager->cgroup_unit, s, u);
+                        assert(hashmap_put(u->manager->cgroup_unit, s, u) == 1);
                         continue;
                 }
 
+                if (rt) {
+                        r = exec_runtime_deserialize_item(rt, u, l, v, fds);
+                        if (r < 0)
+                                return r;
+                        if (r > 0)
+                                continue;
+                }
+
                 r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds);
                 if (r < 0)
                         return r;
@@ -2358,7 +2339,7 @@ int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
 
 int unit_add_node_link(Unit *u, const char *what, bool wants) {
         Unit *device;
-        char *e;
+        _cleanup_free_ char *e = NULL;
         int r;
 
         assert(u);
@@ -2376,7 +2357,7 @@ int unit_add_node_link(Unit *u, const char *what, bool wants) {
                 return -ENOMEM;
 
         r = manager_load_unit(u->manager, e, NULL, NULL, &device);
-        free(e);
+
         if (r < 0)
                 return r;
 
@@ -2539,7 +2520,7 @@ bool unit_active_or_pending(Unit *u) {
         return false;
 }
 
-int unit_kill(Unit *u, KillWho w, int signo, DBusError *error) {
+int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) {
         assert(u);
         assert(w >= 0 && w < _KILL_WHO_MAX);
         assert(signo > 0);
@@ -2551,29 +2532,57 @@ int unit_kill(Unit *u, KillWho w, int signo, DBusError *error) {
         return UNIT_VTABLE(u)->kill(u, w, signo, error);
 }
 
+static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) {
+        Set *pid_set;
+        int r;
+
+        pid_set = set_new(trivial_hash_func, trivial_compare_func);
+        if (!pid_set)
+                return NULL;
+
+        /* Exclude the main/control pids from being killed via the cgroup */
+        if (main_pid > 0) {
+                r = set_put(pid_set, LONG_TO_PTR(main_pid));
+                if (r < 0)
+                        goto fail;
+        }
+
+        if (control_pid > 0) {
+                r = set_put(pid_set, LONG_TO_PTR(control_pid));
+                if (r < 0)
+                        goto fail;
+        }
+
+        return pid_set;
+
+fail:
+        set_free(pid_set);
+        return NULL;
+}
+
 int unit_kill_common(
                 Unit *u,
                 KillWho who,
                 int signo,
                 pid_t main_pid,
                 pid_t control_pid,
-                DBusError *error) {
+                sd_bus_error *error) {
 
         int r = 0;
 
         if (who == KILL_MAIN && main_pid <= 0) {
                 if (main_pid < 0)
-                        dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type));
+                        sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type));
                 else
-                        dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
+                        sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
                 return -ESRCH;
         }
 
         if (who == KILL_CONTROL && control_pid <= 0) {
                 if (control_pid < 0)
-                        dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type));
+                        sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type));
                 else
-                        dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
+                        sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
                 return -ESRCH;
         }
 
@@ -2591,23 +2600,11 @@ int unit_kill_common(
                 _cleanup_set_free_ Set *pid_set = NULL;
                 int q;
 
-                pid_set = set_new(trivial_hash_func, trivial_compare_func);
+                /* Exclude the main/control pids from being killed via the cgroup */
+                pid_set = unit_pid_set(main_pid, control_pid);
                 if (!pid_set)
                         return -ENOMEM;
 
-                /* Exclude the control/main pid from being killed via the cgroup */
-                if (control_pid > 0) {
-                        q = set_put(pid_set, LONG_TO_PTR(control_pid));
-                        if (q < 0)
-                                return q;
-                }
-
-                if (main_pid > 0) {
-                        q = set_put(pid_set, LONG_TO_PTR(main_pid));
-                        if (q < 0)
-                                return q;
-                }
-
                 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;
@@ -2633,7 +2630,7 @@ UnitFileState unit_get_unit_file_state(Unit *u) {
         if (u->unit_file_state < 0 && u->fragment_path)
                 u->unit_file_state = unit_file_get_state(
                                 u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER,
-                                NULL, path_get_file_name(u->fragment_path));
+                                NULL, basename(u->fragment_path));
 
         return u->unit_file_state;
 }
@@ -2646,7 +2643,7 @@ Unit* unit_ref_set(UnitRef *ref, Unit *u) {
                 unit_ref_unset(ref);
 
         ref->unit = u;
-        LIST_PREPEND(UnitRef, refs, u->refs, ref);
+        LIST_PREPEND(refs, u->refs, ref);
         return u;
 }
 
@@ -2656,49 +2653,10 @@ void unit_ref_unset(UnitRef *ref) {
         if (!ref->unit)
                 return;
 
-        LIST_REMOVE(UnitRef, refs, ref->unit->refs, ref);
+        LIST_REMOVE(refs, ref->unit->refs, ref);
         ref->unit = NULL;
 }
 
-int unit_add_one_mount_link(Unit *u, Mount *m) {
-        char **i;
-
-        assert(u);
-        assert(m);
-
-        if (u->load_state != UNIT_LOADED ||
-            UNIT(m)->load_state != UNIT_LOADED)
-                return 0;
-
-        STRV_FOREACH(i, u->requires_mounts_for) {
-
-                if (UNIT(m) == u)
-                        continue;
-
-                if (!path_startswith(*i, m->where))
-                        continue;
-
-                return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
-        }
-
-        return 0;
-}
-
-int unit_add_mount_links(Unit *u) {
-        Unit *other;
-        int r;
-
-        assert(u);
-
-        LIST_FOREACH(units_by_type, other, u->manager->units_by_type[UNIT_MOUNT]) {
-                r = unit_add_one_mount_link(u, MOUNT(other));
-                if (r < 0)
-                        return r;
-        }
-
-        return 0;
-}
-
 int unit_exec_context_defaults(Unit *u, ExecContext *c) {
         unsigned i;
         int r;
@@ -2736,6 +2694,17 @@ ExecContext *unit_get_exec_context(Unit *u) {
         return (ExecContext*) ((uint8_t*) u + offset);
 }
 
+KillContext *unit_get_kill_context(Unit *u) {
+        size_t offset;
+        assert(u);
+
+        offset = UNIT_VTABLE(u)->kill_context_offset;
+        if (offset <= 0)
+                return NULL;
+
+        return (KillContext*) ((uint8_t*) u + offset);
+}
+
 CGroupContext *unit_get_cgroup_context(Unit *u) {
         size_t offset;
 
@@ -2746,7 +2715,18 @@ CGroupContext *unit_get_cgroup_context(Unit *u) {
         return (CGroupContext*) ((uint8_t*) u + offset);
 }
 
+ExecRuntime *unit_get_exec_runtime(Unit *u) {
+        size_t offset;
+
+        offset = UNIT_VTABLE(u)->exec_runtime_offset;
+        if (offset <= 0)
+                return NULL;
+
+        return *(ExecRuntime**) ((uint8_t*) u + offset);
+}
+
 static int drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, char **_p, char **_q) {
+        _cleanup_free_ char *b = NULL;
         char *p, *q;
         int r;
 
@@ -2756,7 +2736,11 @@ static int drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, c
         assert(_q);
         assert(mode & (UNIT_PERSISTENT|UNIT_RUNTIME));
 
-        if (!filename_is_safe(name))
+        b = xescape(name, "/.");
+        if (!b)
+                return -ENOMEM;
+
+        if (!filename_is_safe(b))
                 return -EINVAL;
 
         if (u->manager->running_as == SYSTEMD_USER) {
@@ -2776,7 +2760,7 @@ static int drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, c
         if (!p)
                 return -ENOMEM;
 
-        q = strjoin(p, "/90-", name, ".conf", NULL);
+        q = strjoin(p, "/90-", b, ".conf", NULL);
         if (!q) {
                 free(p);
                 return -ENOMEM;
@@ -2806,7 +2790,29 @@ int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, co
         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) {
+int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) {
+        _cleanup_free_ char *p = NULL;
+        va_list ap;
+        int r;
+
+        assert(u);
+        assert(name);
+        assert(format);
+
+        if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)))
+                return 0;
+
+        va_start(ap, format);
+        r = vasprintf(&p, format, ap);
+        va_end(ap);
+
+        if (r < 0)
+                return -ENOMEM;
+
+        return unit_write_drop_in(u, mode, name, p);
+}
+
+int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) {
         _cleanup_free_ char *ndata = NULL;
 
         assert(u);
@@ -2816,6 +2822,9 @@ int unit_write_drop_in_private_section(Unit *u, UnitSetPropertiesMode mode, cons
         if (!UNIT_VTABLE(u)->private_section)
                 return -EINVAL;
 
+        if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)))
+                return 0;
+
         ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL);
         if (!ndata)
                 return -ENOMEM;
@@ -2823,6 +2832,28 @@ int unit_write_drop_in_private_section(Unit *u, UnitSetPropertiesMode mode, cons
         return unit_write_drop_in(u, mode, name, ndata);
 }
 
+int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) {
+        _cleanup_free_ char *p = NULL;
+        va_list ap;
+        int r;
+
+        assert(u);
+        assert(name);
+        assert(format);
+
+        if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)))
+                return 0;
+
+        va_start(ap, format);
+        r = vasprintf(&p, format, ap);
+        va_end(ap);
+
+        if (r < 0)
+                return -ENOMEM;
+
+        return unit_write_drop_in_private(u, mode, name, p);
+}
+
 int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) {
         _cleanup_free_ char *p = NULL, *q = NULL;
         int r;
@@ -2833,6 +2864,9 @@ int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) {
                 return 0;
 
         r = drop_in_file(u, mode, name, &p, &q);
+        if (r < 0)
+                return r;
+
         if (unlink(q) < 0)
                 r = errno == ENOENT ? 0 : -errno;
         else
@@ -2904,10 +2938,13 @@ int unit_kill_context(
                         _cleanup_free_ char *comm = NULL;
                         get_process_comm(main_pid, &comm);
 
-                        log_warning_unit(u->id, "Failed to kill main process %li (%s): %s",
-                                         (long) main_pid, strna(comm), strerror(-r));
-                } else
+                        log_warning_unit(u->id, "Failed to kill main process " PID_FMT " (%s): %s", main_pid, strna(comm), strerror(-r));
+                } else {
                         wait_for_exit = !main_pid_alien;
+
+                        if (c->send_sighup)
+                                kill(main_pid, SIGHUP);
+                }
         }
 
         if (control_pid > 0) {
@@ -2917,44 +2954,150 @@ int unit_kill_context(
                         _cleanup_free_ char *comm = NULL;
                         get_process_comm(control_pid, &comm);
 
-                        log_warning_unit(u->id,
-                                         "Failed to kill control process %li (%s): %s",
-                                         (long) control_pid, strna(comm), strerror(-r));
-                } else
+                        log_warning_unit(u->id, "Failed to kill control process " PID_FMT " (%s): %s", control_pid, strna(comm), strerror(-r));
+                } else {
                         wait_for_exit = true;
+
+                        if (c->send_sighup)
+                                kill(control_pid, SIGHUP);
+                }
         }
 
-        if (c->kill_mode == KILL_CONTROL_GROUP && u->cgroup_path) {
+        if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && sigkill)) && u->cgroup_path) {
                 _cleanup_set_free_ Set *pid_set = NULL;
 
-                pid_set = set_new(trivial_hash_func, trivial_compare_func);
+                /* Exclude the main/control pids from being killed via the cgroup */
+                pid_set = unit_pid_set(main_pid, control_pid);
                 if (!pid_set)
                         return -ENOMEM;
 
-                /* Exclude the main/control pids from being killed via the cgroup */
-                if (main_pid > 0) {
-                        r = set_put(pid_set, LONG_TO_PTR(main_pid));
-                        if (r < 0)
-                                return r;
-                }
-
-                if (control_pid > 0) {
-                        r = set_put(pid_set, LONG_TO_PTR(control_pid));
-                        if (r < 0)
-                                return r;
-                }
-
                 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));
-                } else if (r > 0)
+                } else if (r > 0) {
                         wait_for_exit = true;
+
+                        if (c->send_sighup) {
+                                set_free(pid_set);
+
+                                pid_set = unit_pid_set(main_pid, control_pid);
+                                if (!pid_set)
+                                        return -ENOMEM;
+
+                                cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, true, true, false, pid_set);
+                        }
+                }
         }
 
         return wait_for_exit;
 }
 
+int unit_require_mounts_for(Unit *u, const char *path) {
+        char prefix[strlen(path) + 1], *p;
+        int r;
+
+        assert(u);
+        assert(path);
+
+        /* Registers a unit for requiring a certain path and all its
+         * prefixes. We keep a simple array of these paths in the
+         * unit, since its usually short. However, we build a prefix
+         * table for all possible prefixes so that new appearing mount
+         * units can easily determine which units to make themselves a
+         * dependency of. */
+
+        if (!path_is_absolute(path))
+                return -EINVAL;
+
+        p = strdup(path);
+        if (!p)
+                return -ENOMEM;
+
+        path_kill_slashes(p);
+
+        if (!path_is_safe(p)) {
+                free(p);
+                return -EPERM;
+        }
+
+        if (strv_contains(u->requires_mounts_for, p)) {
+                free(p);
+                return 0;
+        }
+
+        r = strv_push(&u->requires_mounts_for, p);
+        if (r < 0) {
+                free(p);
+                return r;
+        }
+
+        PATH_FOREACH_PREFIX_MORE(prefix, p) {
+                Set *x;
+
+                x = hashmap_get(u->manager->units_requiring_mounts_for, prefix);
+                if (!x) {
+                        char *q;
+
+                        if (!u->manager->units_requiring_mounts_for) {
+                                u->manager->units_requiring_mounts_for = hashmap_new(string_hash_func, string_compare_func);
+                                if (!u->manager->units_requiring_mounts_for)
+                                        return -ENOMEM;
+                        }
+
+                        q = strdup(prefix);
+                        if (!q)
+                                return -ENOMEM;
+
+                        x = set_new(NULL, NULL);
+                        if (!x) {
+                                free(q);
+                                return -ENOMEM;
+                        }
+
+                        r = hashmap_put(u->manager->units_requiring_mounts_for, q, x);
+                        if (r < 0) {
+                                free(q);
+                                set_free(x);
+                                return r;
+                        }
+                }
+
+                r = set_put(x, u);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int unit_setup_exec_runtime(Unit *u) {
+        ExecRuntime **rt;
+        size_t offset;
+        Iterator i;
+        Unit *other;
+
+        offset = UNIT_VTABLE(u)->exec_runtime_offset;
+        assert(offset > 0);
+
+        /* Check if ther already is an ExecRuntime for this unit? */
+        rt = (ExecRuntime**) ((uint8_t*) u + offset);
+        if (*rt)
+                return 0;
+
+        /* Try to get it from somebody else */
+        SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) {
+
+                *rt = unit_get_exec_runtime(other);
+                if (*rt) {
+                        exec_runtime_ref(*rt);
+                        return 0;
+                }
+        }
+
+        return exec_runtime_make(rt, unit_get_exec_context(u), u->id);
+}
+
 static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = {
         [UNIT_ACTIVE] = "active",
         [UNIT_RELOADING] = "reloading",
@@ -2990,6 +3133,7 @@ static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = {
         [UNIT_RELOAD_PROPAGATED_FROM] = "ReloadPropagatedFrom",
         [UNIT_REFERENCES] = "References",
         [UNIT_REFERENCED_BY] = "ReferencedBy",
+        [UNIT_JOINS_NAMESPACE_OF] = "JoinsNamespaceOf",
 };
 
 DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);