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Re: [Qemu-devel] [RFC PATCH 2/4] qmp/hmp: Add getfd_file monitor command

From: Luiz Capitulino
Subject: Re: [Qemu-devel] [RFC PATCH 2/4] qmp/hmp: Add getfd_file monitor command
Date: Tue, 22 May 2012 16:06:06 -0300

On Tue, 22 May 2012 10:18:22 +0100
Stefan Hajnoczi <address@hidden> wrote:

> QMP commands should be added to qapi-schema.json as described in
> docs/writing-qmp-commands.txt.

Looks like there's consensus on dropping this patch and enhancing getfd
to return the fd number. This would require to first convert getfd from
plain HMP to the QAPI, which is basically to say more or less the same
thing as Stefan said above (you could also look for examples searching
for "qapi: convert" in the git log).

But there's a small problem. Today getfd commands are closely tied to the
Monitor. In Anthony's development tree, the getfd commands are tied to the
new QMP server's session support.

Asking you to integrate the new QMP server only to have the getfd command
returning a simple integer would be too much, but at the same time I think
you'll have to at least to break it from the monitor. This means moving its
data structure away from the Monitor object and probably reworking the
internal API used to get fds (ie. monitor_get_fd()).

Shouldn't be hard, but you should be careful not to break external users.

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