qmp qemu-ga: Revert change that accidentally made qemu-ga accept "id"

Commit cf869d53172 "qmp: support out-of-band (oob) execution" changed
how we check "id":

    Note that in the patch I exported qmp_dispatch_check_obj() to be
    used to check the request earlier, and at the same time allowed
    "id" field to be there since actually we always allow that.

The part after "and" is ill-advised: it makes qemu-ga accept and
ignore "id".  Revert.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180703085358.13941-10-armbru@redhat.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/monitor.c b/monitor.c
index 0dd6e22463..7245ee37ce 100644
--- a/monitor.c
+++ b/monitor.c
@@ -4264,7 +4264,7 @@ static void monitor_qmp_bh_dispatcher(void *data)
 static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens)
 {
     QObject *req, *id = NULL;
-    QDict *qdict = NULL;
+    QDict *qdict;
     MonitorQMP *mon_qmp = container_of(parser, MonitorQMP, parser);
     Monitor *mon = container_of(mon_qmp, Monitor, qmp);
     Error *err = NULL;
@@ -4279,6 +4279,12 @@ static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens)
         goto err;
     }
 
+    qdict = qobject_to(QDict, req);
+    if (qdict) {
+        id = qobject_ref(qdict_get(qdict, "id"));
+        qdict_del(qdict, "id");
+    } /* else will fail qmp_dispatch() */
+
     /* Check against the request in general layout */
     qdict = qmp_dispatch_check_obj(req, &err);
     if (!qdict) {
@@ -4290,16 +4296,12 @@ static void handle_qmp_command(JSONMessageParser *parser, GQueue *tokens)
         goto err;
     }
 
-    id = qdict_get(qdict, "id");
-
     req_obj = g_new0(QMPRequest, 1);
     req_obj->mon = mon;
-    req_obj->id = qobject_ref(id);
+    req_obj->id = id;
     req_obj->req = req;
     req_obj->need_resume = false;
 
-    qdict_del(qdict, "id");
-
     if (qmp_is_oob(qdict)) {
         /* Out-of-band (OOB) requests are executed directly in parser. */
         trace_monitor_qmp_cmd_out_of_band(qobject_get_try_str(req_obj->id)