Re: [Qemu-devel] [RfC PATCH 2/2] console: add screendump-device qmp cmd

[Eric Blake]

On 06/18/2013 03:24 AM, Gerd Hoffmann wrote:

>>>> >> > We have a job API in the block layer.  Would it make sense to have a
>>>> >> > QMP-level job interface?
>> > I'd agree with this.
> Something like the attached patch?  Which is just the bare minimum I'll
> need for screendump.  Basically a one-off bottom half with some monitor
> infrastructure (job id, error handling).  So it isn't for big jobs, but
> for small jobs which have to wait for something before they execute
> (spice-server, guest action, whatever).
> 
> If you wanna some more context: screendump on top of that is here:
> https://www.kraxel.org/cgit/qemu/log/?h=rebase/pixman
> 

> +
> +void monitor_job_cancel(monitor_job *job)
> +{
> +    monitor_job_event(job, "canceled", NULL);
> +    if (job->bh) {
> +        qemu_bh_delete(job->bh);
> +    }
> +    g_free(job);
> +}

What calls this command?

> diff --git a/qapi-schema.json b/qapi-schema.json
> index aced724..a449a43 100644
> --- a/qapi-schema.json
> +++ b/qapi-schema.json
> @@ -2515,6 +2515,16 @@
>      'str': 'str' } }
>  
>  ##
> +# @MonitorJob
> +#
> +# Monitor job id.
> +#

No mention of @job-id?

> +# Since 1.6
> +##
> +{ 'type': 'MonitorJob',
> +  'data': { 'job-id': 'int' } }

For a type, this looks okay; but where are the commands that use this
type?  I take it new commands (like screendump) would return a
MonitorJob, and that we need a query-monitor-jobs as well as a
monitor-job-cancel.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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