qmp: Include 'abstract' field on 'qom-list-types' output

A client may be interested in getting the list of both abstract and
non-abstract types.  Instead of requiring them to make multiple queries
with different filter arguments, just return an 'abstract' field in
'qom-list-types'.

In addition to the new test code for validating this field, update the
abstract-interfaces test case to query for all 'interface' subtypes
(including abstract ones), and to look at the 'abstract' field directly.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20170707122215.8819-3-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/qmp.c b/qmp.c
index 2cd40c3080..7a9de06af4 100644
--- a/qmp.c
+++ b/qmp.c
@@ -433,6 +433,7 @@ static void qom_list_types_tramp(ObjectClass *klass, void *data)
 
     info = g_malloc0(sizeof(*info));
     info->name = g_strdup(object_class_get_name(klass));
+    info->has_abstract = info->abstract = object_class_is_abstract(klass);
 
     e = g_malloc0(sizeof(*e));
     e->value = info;