Re: [Qemu-devel] QMP interface for drive-add (or even blockdev-add)

[Stefan Hajnoczi <stefanha@gmail.com>]

On Wed, May 22, 2013 at 03:53:05PM +0200, Kevin Wolf wrote:
> Am 16.05.2013 um 21:05 hat Eric Blake geschrieben:
> > On 05/16/2013 02:24 AM, Kevin Wolf wrote:
> The other thing that I'm not sure about is whether we should teach QAPI
> to parse certain data structures just into QDicts instead of C structs,
> or if dealing with the big unions inside the block layer actually makes
> sense.

This is an interesting question.  It's very convenient from the code
side - we don't have to worry about laying down a schema.

However, the point of QAPI is to offer that schema that allows for us to
reason about things like compatibility (hard to sneak in a patch that
modifies the schema, easy to sneak in a patch that modifies block driver
parameter code) and eliminates the boilerplate of type-checking/basic
input validation.

Even if it requires some effort, I think we should avoid tunneling
schema-less data over QAPI.

Stefan