core: make RuntimeDirectoryPreserve= works with non-service units

src/core/mount.c

@@ -826,7 +826,7 @@ static void mount_enter_dead(Mount *m, MountResult f) {
 
         m->exec_runtime = exec_runtime_unref(m->exec_runtime, true);
 
-        exec_context_destroy_runtime_directory(&m->exec_context, UNIT(m)->manager->prefix[EXEC_DIRECTORY_RUNTIME]);
+        unit_destroy_runtime_directory(UNIT(m), &m->exec_context);
 
         unit_unref_uid_gid(UNIT(m), true);
 
@@ -1996,6 +1996,8 @@ const UnitVTable mount_vtable = {
         .active_state = mount_active_state,
         .sub_state_to_string = mount_sub_state_to_string,
 
+        .will_restart = unit_will_restart_default,
+
         .may_gc = mount_may_gc,
 
         .sigchld_event = mount_sigchld_event,

src/core/service.c

@@ -1721,12 +1721,8 @@ static bool service_will_restart(Unit *u) {
                 return true;
         if (s->state == SERVICE_AUTO_RESTART)
                 return true;
-        if (!UNIT(s)->job)
-                return false;
-        if (UNIT(s)->job->type == JOB_START)
-                return true;
 
-        return false;
+        return unit_will_restart_default(u);
 }
 
 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {

src/core/socket.c

@@ -2035,7 +2035,7 @@ static void socket_enter_dead(Socket *s, SocketResult f) {
 
         s->exec_runtime = exec_runtime_unref(s->exec_runtime, true);
 
-        exec_context_destroy_runtime_directory(&s->exec_context, UNIT(s)->manager->prefix[EXEC_DIRECTORY_RUNTIME]);
+        unit_destroy_runtime_directory(UNIT(s), &s->exec_context);
 
         unit_unref_uid_gid(UNIT(s), true);
 
@@ -3353,6 +3353,8 @@ const UnitVTable socket_vtable = {
         .active_state = socket_active_state,
         .sub_state_to_string = socket_sub_state_to_string,
 
+        .will_restart = unit_will_restart_default,
+
         .may_gc = socket_may_gc,
 
         .sigchld_event = socket_sigchld_event,

src/core/swap.c

@@ -683,7 +683,7 @@ static void swap_enter_dead(Swap *s, SwapResult f) {
 
         s->exec_runtime = exec_runtime_unref(s->exec_runtime, true);
 
-        exec_context_destroy_runtime_directory(&s->exec_context, UNIT(s)->manager->prefix[EXEC_DIRECTORY_RUNTIME]);
+        unit_destroy_runtime_directory(UNIT(s), &s->exec_context);
 
         unit_unref_uid_gid(UNIT(s), true);
 
@@ -1529,6 +1529,8 @@ const UnitVTable swap_vtable = {
         .active_state = swap_active_state,
         .sub_state_to_string = swap_sub_state_to_string,
 
+        .will_restart = unit_will_restart_default,
+
         .may_gc = swap_may_gc,
 
         .sigchld_event = swap_sigchld_event,

src/core/unit.c

@@ -4069,6 +4069,17 @@ bool unit_active_or_pending(Unit *u) {
         return false;
 }
 
+bool unit_will_restart_default(Unit *u) {
+        assert(u);
+
+        if (!u->job)
+                return false;
+        if (u->job->type == JOB_START)
+                return true;
+
+        return false;
+}
+
 bool unit_will_restart(Unit *u) {
         assert(u);
 

src/core/unit.h

@@ -752,6 +752,7 @@ const char *unit_slice_name(Unit *u);
 bool unit_stop_pending(Unit *u) _pure_;
 bool unit_inactive_or_pending(Unit *u) _pure_;
 bool unit_active_or_pending(Unit *u);
+bool unit_will_restart_default(Unit *u);
 bool unit_will_restart(Unit *u);
 
 int unit_add_default_target_dependency(Unit *u, Unit *target);