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qmp: fix qmp_capabilities error regression 

When someone sends a command before QMP handshake, the error used to be
like this:

 {"execute": "query-cpus"}
 {"error": {"class": "CommandNotFound", "desc":
            "Expecting capabilities negotiation with 'qmp_capabilities'"}}

While after cf869d5317 it becomes:

 {"execute": "query-cpus"}
 {"error": {"class": "CommandNotFound", "desc":
            "The command query-cpus has not been found"}}

Fix it back to the nicer one.

Fixes: cf869d5317 ("qmp: support out-of-band (oob) execution", 2018-03-19)
Reported-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180326063901.27425-2-peterx@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: commit message grammar tweaks]
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Peter Xu 2018-03-26 14:38:54 +08:00 committed by Eric Blake
parent 625eaca9e5
commit 9ddb7456c8
1 changed files with 8 additions and 15 deletions
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23
monitor.c
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@ -1203,8 +1203,14 @@ static bool qmp_cmd_oob_check(Monitor *mon, QDict *req, Error **errp)
cmd = qmp_find_command(mon->qmp.commands, command);
if (!cmd) {
error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND,
"The command %s has not been found", command);
if (mon->qmp.commands == &qmp_cap_negotiation_commands) {
error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND,
"Expecting capabilities negotiation "
"with 'qmp_capabilities'");
} else {
error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND,
"The command %s has not been found", command);
}
return false;
}
@ -4027,7 +4033,6 @@ 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;
@ -4050,18 +4055,6 @@ 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);