From: Paolo Bonzini <pbonzini@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Michael Roth <mdroth@linux.vnet.ibm.com>,
qemu-devel@nongnu.org, lcapitulino@redhat.com
Subject: Re: [Qemu-devel] [RFC/RFA PATCH] qapi: detect extra members inside structs
Date: Mon, 19 Mar 2012 20:51:20 +0100 [thread overview]
Message-ID: <4F678E38.7050902@redhat.com> (raw)
In-Reply-To: <4F678A37.1020101@codemonkey.ws>
Il 19/03/2012 20:34, Anthony Liguori ha scritto:
>>
>> Is this acceptable or just wrong?
>
> This is a feature. The idea is that with QMP, old clients just ignore
> extra members in a structure. I've never felt that comfortable with
> this as a semantic but this is how QMP was designed.
For old clients that could be fine. But what about old servers? :)
Perhaps we need an argument to the QMPInputVisitor constructor to
control this.
> If you don't allow this semantic, then it's impossible to ever add a
> field to an existing type as that would break backwards compatibility.
Paolo
next prev parent reply other threads:[~2012-03-19 19:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-19 19:29 [Qemu-devel] [RFC/RFA PATCH] qapi: detect extra members inside structs Paolo Bonzini
2012-03-19 19:34 ` Anthony Liguori
2012-03-19 19:51 ` Paolo Bonzini [this message]
2012-03-19 19:56 ` Anthony Liguori
2012-03-19 20:22 ` Eric Blake
2012-03-19 20:30 ` Anthony Liguori
2012-03-19 20:43 ` Luiz Capitulino
2012-03-19 22:29 ` Michael Roth
2012-03-19 22:38 ` Anthony Liguori
2012-03-19 23:45 ` Michael Roth
2012-03-20 0:49 ` Anthony Liguori
2012-03-20 12:15 ` Luiz Capitulino
2012-03-20 19:33 ` Anthony Liguori
2012-03-20 17:31 ` Paolo Bonzini
2012-03-20 0:28 ` Michael Roth
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