qemu-io: Use user_creatable_process_cmdline() for --object

This switches qemu-io from a QemuOpts-based parser for --object to
user_creatable_process_cmdline() which uses a keyval parser and enforces
the QAPI schema.

Apart from being a cleanup, this makes non-scalar properties accessible.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

qemu-io.c

@@ -477,23 +477,6 @@ enum {
     OPTION_IMAGE_OPTS = 257,
 };
 
-static QemuOptsList qemu_object_opts = {
-    .name = "object",
-    .implied_opt_name = "qom-type",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head),
-    .desc = {
-        { }
-    },
-};
-
-static bool qemu_io_object_print_help(const char *type, QemuOpts *opts)
-{
-    if (user_creatable_print_help(type, opts)) {
-        exit(0);
-    }
-    return true;
-}
-
 static QemuOptsList file_opts = {
     .name = "file",
     .implied_opt_name = "file",
@@ -550,7 +533,6 @@ int main(int argc, char **argv)
     qcrypto_init(&error_fatal);
 
     module_call_init(MODULE_INIT_QOM);
-    qemu_add_opts(&qemu_object_opts);
     qemu_add_opts(&qemu_trace_opts);
     bdrv_init();
 
@@ -612,14 +594,9 @@ int main(int argc, char **argv)
         case 'U':
             force_share = true;
             break;
-        case OPTION_OBJECT: {
-            QemuOpts *qopts;
-            qopts = qemu_opts_parse_noisily(&qemu_object_opts,
-                                            optarg, true);
-            if (!qopts) {
-                exit(1);
-            }
-        }   break;
+        case OPTION_OBJECT:
+            user_creatable_process_cmdline(optarg);
+            break;
         case OPTION_IMAGE_OPTS:
             imageOpts = true;
             break;
@@ -644,10 +621,6 @@ int main(int argc, char **argv)
         exit(1);
     }
 
-    qemu_opts_foreach(&qemu_object_opts,
-                      user_creatable_add_opts_foreach,
-                      qemu_io_object_print_help, &error_fatal);
-
     if (!trace_init_backends()) {
         exit(1);
     }