3 files changed, 26 insertions, 3 deletions
diff --git a/src/core/dbus-manager.c b/src/core/dbus-manager.c
index 4d730290b2..2562396180 100644
--- a/src/core/dbus-manager.c
+++ b/src/core/dbus-manager.c
@@ -630,9 +630,13 @@ static int method_set_unit_properties(sd_bus_message *message, void *userdata, s
         if (r < 0)
                 return r;
 
-        u = manager_get_unit(m, name);
-        if (!u)
-                return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
+        r = manager_load_unit(m, name, NULL, error, &u);
+        if (r < 0)
+                return r;
+
+        r = bus_unit_check_load_state(u, error);
+        if (r < 0)
+                return r;
 
         return bus_unit_method_set_properties(message, u, error);
 }
diff --git a/src/core/dbus-unit.c b/src/core/dbus-unit.c
index d9b7382c82..66b465a0b7 100644
--- a/src/core/dbus-unit.c
+++ b/src/core/dbus-unit.c
@@ -1251,3 +1251,20 @@ int bus_unit_set_properties(
 
         return n;
 }
+
+int bus_unit_check_load_state(Unit *u, sd_bus_error *error) {
+
+        if (u->load_state == UNIT_LOADED)
+                return 0;
+
+        /* Give a better description of the unit error when
+         * possible. Note that in the case of UNIT_MASKED, load_error
+         * is not set. */
+        if (u->load_state == UNIT_MASKED)
+                return sd_bus_error_setf(error, BUS_ERROR_UNIT_MASKED, "Unit is masked.");
+
+        if (u->load_state == UNIT_NOT_FOUND)
+                return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit not found.");
+
+        return sd_bus_error_set_errnof(error, u->load_error, "Unit is not loaded properly: %m.");
+}
diff --git a/src/core/dbus-unit.h b/src/core/dbus-unit.h
index b8c6ec398a..ac9ee2d6b8 100644
--- a/src/core/dbus-unit.h
+++ b/src/core/dbus-unit.h
@@ -38,3 +38,5 @@ int bus_unit_method_reset_failed(sd_bus_message *message, void *userdata, sd_bus
 int bus_unit_queue_job(sd_bus_message *message, Unit *u, JobType type, JobMode mode, bool reload_if_possible, sd_bus_error *error);
 int bus_unit_set_properties(Unit *u, sd_bus_message *message, UnitSetPropertiesMode mode, bool commit, sd_bus_error *error);
 int bus_unit_method_set_properties(sd_bus_message *message, void *userdata, sd_bus_error *error);
+
+int bus_unit_check_load_state(Unit *u, sd_bus_error *error);