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Re: [Qemu-devel] Multiple QMP socket clients
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-devel] Multiple QMP socket clients |
Date: |
Tue, 11 Oct 2016 15:08:34 +0100 |
User-agent: |
Mutt/1.7.1 (2016-10-04) |
* Daniel P. Berrange (address@hidden) wrote:
> On Tue, Oct 11, 2016 at 12:26:37PM +0200, Samuel Ortiz wrote:
> > Hi,
> >
> > On a qemu instance started with a qmp unix socket:
> >
> > -qmp unix:/tmp/ctrl.sock,server,nowait
> >
> > I am trying to have multiple clients working on that socket but
> > although the qmp server seems to accept the connections, only the first
> > connected client gets his request processed. The next client requests
> > will just hang until the first one exits.
> >
> > Is that an intended behaviour ?
>
> Yes, the character device code is designed around the idea of a single
> endpoint.
>
> In the case of the monitor you could work around it by adding multiple
> -qmp arguemnts, each with different socket. Of course you have to make
> sure each client doesn't trample on the other client when doing this.
But why does it accept the connection?
I thought you could say only accept a single connection on a socket.
(The backlog parameter to listen(2) but I can't find out listen.)
Dave
>
>
> Regards,
> Daniel
> --
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>
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK