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Date: Fri, 12 Oct 2018 11:28:23 +0100
From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= <berrange@redhat.com>
Message-ID: <20181012102823.GW16720@redhat.com>
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References: <20180914135230.15178-1-marcandre.lureau@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH v2] vhost-user: define conventions for
 vhost-user backends
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To: Gerd Hoffmann <kraxel@redhat.com>
Cc: =?utf-8?Q?Marc-Andr=C3=A9?= Lureau <marcandre.lureau@redhat.com>, Victor Kaplansky <victork@redhat.com>, "Michael S . Tsirkin" <mst@redhat.com>, libvir-list@redhat.com, Markus Armbruster <armbru@redhat.com>, qemu-devel@nongnu.org, "Dr . David Alan Gilbert" <dgilbert@redhat.com>, Maxime Coquelin <maxime.coquelin@redhat.com>, Gonglei <arei.gonglei@huawei.com>, Felipe Franciosi <felipe@nutanix.com>, Changpeng Liu <changpeng.liu@intel.com>

On Fri, Oct 12, 2018 at 12:23:11PM +0200, Gerd Hoffmann wrote:
>   Hi,
> 
> > Note, I can't remember what Markus had proposed for CLI arguments in
> > QAPI, so I invented something arbitary but plausible.
> 
> Using qapi visitors to parse the command line.  Used by -blockdev and
> -display (and maybe others meanwhile).  See parse_display_qapi().
> 
> I think Daniels suggestion was to do that in the backends ...

More than just that - I was thinking of this series:

   http://lists.gnu.org/archive/html/qemu-devel/2017-10/msg00209.html

In that there is no QemuOpts, or getopt(), etc. You end up using QAPI
for the entire argv parsing procss:

    QAPIOption *qopt;

    qopt = qapi_options_parse(argc, argv);

    for (i = 0; !qopt[i].cnt; i++) {
       switch (qopt[i].type) {
       case QAPI_OPTION_KIND_NODEFCONFIG:
           defconfig = false;
           break;
       case QAPI_OPTION_KIND_NO_USER_CONFIG:
           userconfig = false;
           break;
	   ...etc...
    }

Regards,
Daniel
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