[PATCH 16/25] qom: do not modify QDict argument in user_creatable_add_dict

[Paolo Bonzini <pbonzini@redhat.com>]

-object will process its QDicts in two steps, first for the "early" objects and
then for the "late" objects.  If qom-type is removed by the "early" pass, the
late pass fails.  So just create a shallow copy of the QDict in
user_creatable_add_dict.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/qom/object_interfaces.h |  2 +-
 qom/object_interfaces.c         | 11 +++++++----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h
index abb23eaea3..ed0d7d663b 100644
--- a/include/qom/object_interfaces.h
+++ b/include/qom/object_interfaces.h
@@ -102,7 +102,7 @@ Object *user_creatable_add_type(const char *type, const char *id,
  *
  * Returns: %true on success, %false on failure.
  */
-bool user_creatable_add_dict(QDict *qdict, bool keyval, Error **errp);
+bool user_creatable_add_dict(const QDict *qdict, bool keyval, Error **errp);
 
 /**
  * user_creatable_add_opts:
diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c
index 97bf88908e..fbbf5e8ad3 100644
--- a/qom/object_interfaces.c
+++ b/qom/object_interfaces.c
@@ -105,24 +105,25 @@ out:
     return obj;
 }
 
-bool user_creatable_add_dict(QDict *qdict, bool keyval, Error **errp)
+bool user_creatable_add_dict(const QDict *dict, bool keyval, Error **errp)
 {
     Visitor *v;
-    Object *obj;
+    Object *obj = NULL;
+    QDict *qdict = qdict_clone_shallow(dict);
     g_autofree char *type = NULL;
     g_autofree char *id = NULL;
 
     type = g_strdup(qdict_get_try_str(qdict, "qom-type"));
     if (!type) {
         error_setg(errp, QERR_MISSING_PARAMETER, "qom-type");
-        return false;
+        goto out;
     }
     qdict_del(qdict, "qom-type");
 
     id = g_strdup(qdict_get_try_str(qdict, "id"));
     if (!id) {
         error_setg(errp, QERR_MISSING_PARAMETER, "id");
-        return false;
+        goto out;
     }
     qdict_del(qdict, "id");
 
@@ -134,6 +135,8 @@ bool user_creatable_add_dict(QDict *qdict, bool keyval, Error **errp)
     obj = user_creatable_add_type(type, id, qdict, v, errp);
     visit_free(v);
     object_unref(obj);
+out:
+    qobject_unref(qdict);
     return !!obj;
 }
 
-- 
2.26.2