[Qemu-devel] [PATCH] monitor: fix expected qmp_capabilities error description regression

[Marc-André Lureau]

Fix regression introduced in commit cf869d53172920536a14180a83292b240e9d0545:

Before:
{"execute":"foo"}
{"error": {"class": "CommandNotFound", "desc": "Expecting capabilities 
negotiation with 'qmp_capabilities'"}}

After:
{"execute":"foo"}
{"error": {"class": "CommandNotFound", "desc": "The command foo has not been 
found"}}

Because qmp_cmd_oob_check() happens before
monitor_qmp_dispatch_one(). Move the error manipulation code to
monitor_qmp_respond() instead.

Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
 monitor.c | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/monitor.c b/monitor.c
index 6ccd2fc089..d57bbbb134 100644
--- a/monitor.c
+++ b/monitor.c
@@ -3997,6 +3997,18 @@ static void monitor_qmp_respond(Monitor *mon, QObject 
*rsp,
             qdict_put_obj(qobject_to(QDict, rsp), "id", id);
         }
 
+        if (mon->qmp.commands == &qmp_cap_negotiation_commands) {
+            qdict = qdict_get_qdict(qobject_to(QDict, rsp), "error");
+            if (qdict
+                && !g_strcmp0(qdict_get_try_str(qdict, "class"),
+                          QapiErrorClass_str(ERROR_CLASS_COMMAND_NOT_FOUND))) {
+                /* Provide a more useful error message */
+                qdict_del(qdict, "desc");
+                qdict_put_str(qdict, "desc", "Expecting capabilities"
+                              " negotiation with 'qmp_capabilities'");
+            }
+        }
+
         monitor_json_emitter(mon, rsp);
     }
 
@@ -4028,7 +4040,6 @@ static void monitor_qmp_dispatch_one(QMPRequest *req_obj)
 {
     Monitor *mon, *old_mon;
     QObject *req, *rsp = NULL, *id;
-    QDict *qdict = NULL;
     bool need_resume;
 
     req = req_obj->req;
@@ -4051,18 +4062,6 @@ static void monitor_qmp_dispatch_one(QMPRequest *req_obj)
 
     cur_mon = old_mon;
 
-    if (mon->qmp.commands == &qmp_cap_negotiation_commands) {
-        qdict = qdict_get_qdict(qobject_to(QDict, rsp), "error");
-        if (qdict
-            && !g_strcmp0(qdict_get_try_str(qdict, "class"),
-                    QapiErrorClass_str(ERROR_CLASS_COMMAND_NOT_FOUND))) {
-            /* Provide a more useful error message */
-            qdict_del(qdict, "desc");
-            qdict_put_str(qdict, "desc", "Expecting capabilities negotiation"
-                          " with 'qmp_capabilities'");
-        }
-    }
-
     /* Respond if necessary */
     monitor_qmp_respond(mon, rsp, NULL, id);
 
-- 
2.17.0.rc1.1.g4c4f2b46a3