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[Qemu-devel] Re: [PATCH][RESPIN] QMP: Emit asynchronous events on all QM
From: |
Luiz Capitulino |
Subject: |
[Qemu-devel] Re: [PATCH][RESPIN] QMP: Emit asynchronous events on all QMP monitors |
Date: |
Fri, 15 Jan 2010 13:23:21 -0200 |
On Fri, 15 Jan 2010 09:16:03 -0600
Adam Litke <address@hidden> wrote:
> On Fri, 2010-01-15 at 13:00 -0200, Luiz Capitulino wrote:
> > The function will return on the first !QMP Monitor, the
> > right QLIST_FOREACH() body is:
> >
> > if (monitor_ctrl_mode(mon)) {
> > monitor_json_emitter(mon, QOBJECT(qmp));
> > }
> >
> > I'll ACK the respin.
>
> Ah right, of course. Thanks and here it is.
>
> When using a control/QMP monitor in tandem with a regular monitor,
> asynchronous
> messages can get lost depending on the order of the QEMU program arguments.
> QEMU events issued by monitor_protocol_event() always go to cur_mon. If the
> user monitor was specified on the command line first (or it has ,default), the
> message will be directed to the user monitor (not the QMP monitor).
> Additionally, only one QMP session is currently able to receive async
> messages.
>
> To avoid this confusion, scan through the list of monitors and emit the
> message
> on each QMP monitor.
>
> Signed-off-by: Adam Litke <address@hidden>
> Acked-by: Luiz Capitulino <address@hidden>
Now it's good, hope Anthony's script can get a patch from a thread,
this is probably good for stable too.
Btw, we have a lot of QMP tasks in case you're interested :-)
>
> diff --git a/monitor.c b/monitor.c
> index 134ed15..6a2c7fb 100644
> --- a/monitor.c
> +++ b/monitor.c
> @@ -334,13 +334,10 @@ void monitor_protocol_event(MonitorEvent event, QObject
> *data)
> {
> QDict *qmp;
> const char *event_name;
> - Monitor *mon = cur_mon;
> + Monitor *mon;
>
> assert(event < QEVENT_MAX);
>
> - if (!monitor_ctrl_mode(mon))
> - return;
> -
> switch (event) {
> case QEVENT_DEBUG:
> event_name = "DEBUG";
> @@ -373,7 +370,11 @@ void monitor_protocol_event(MonitorEvent event, QObject
> *data)
> qdict_put_obj(qmp, "data", data);
> }
>
> - monitor_json_emitter(mon, QOBJECT(qmp));
> + QLIST_FOREACH(mon, &mon_list, entry) {
> + if (monitor_ctrl_mode(mon)) {
> + monitor_json_emitter(mon, QOBJECT(qmp));
> + }
> + }
> QDECREF(qmp);
> }
>
>
>