pid1: also encode whether to send plymouth notifications in UnitVTable

src/core/manager.c

@@ -3386,7 +3386,7 @@ void manager_send_unit_plymouth(Manager *m, Unit *u) {
         if (detect_container() > 0)
                 return;
 
-        if (!IN_SET(u->type, UNIT_SERVICE, UNIT_MOUNT, UNIT_SWAP))
+        if (!UNIT_VTABLE(u)->notify_plymouth)
                 return;
 
         /* We set SOCK_NONBLOCK here so that we rather drop the

src/core/mount.c

@@ -2398,4 +2398,6 @@ const UnitVTable mount_vtable = {
         },
 
         .can_start = mount_can_start,
+
+        .notify_plymouth = true,
 };

src/core/service.c

@@ -5168,6 +5168,8 @@ const UnitVTable service_vtable = {
 
         .can_start = service_can_start,
 
+        .notify_plymouth = true,
+
         .audit_start_message_type = AUDIT_SERVICE_START,
         .audit_stop_message_type = AUDIT_SERVICE_STOP,
 };

src/core/swap.c

@@ -1687,4 +1687,6 @@ const UnitVTable swap_vtable = {
         },
 
         .can_start = swap_can_start,
+
+        .notify_plymouth = true,
 };

src/core/unit.h

@@ -783,6 +783,9 @@ typedef struct UnitVTable {
         /* True if systemd-oomd can monitor and act on this unit's recursive children's cgroups  */
         bool can_set_managed_oom;
 
+        /* If true, we'll notify plymouth about this unit */
+        bool notify_plymouth;
+
         /* The audit events to generate on start + stop (or 0 if none shall be generated) */
         int audit_start_message_type;
         int audit_stop_message_type;