Re: [Qemu-devel] [PATCH v3 00/12] block/json: Add JSON protocol driver

[Stefan Hajnoczi <stefanha@redhat.com>]

On Mon, May 05, 2014 at 06:19:07PM +0200, Max Reitz wrote:
> On 10.04.2014 20:43, Max Reitz wrote:
> >This series adds a passthrough JSON protocol block driver. Its filenames
> >are JSON objects prefixed by "json:". The objects are used as options
> >for opening another block device which will be the child of the JSON
> >device. Regarding this child device, the JSON driver behaves nearly the
> >same as raw_bsd in that it is just a passthrough driver. The only
> >difference is probably that the JSON driver identifies itself as a block
> >filter, in contrast to raw_bsd.
> >
> >The purpose of this driver is that it may sometimes be desirable to
> >specify options for a block device where only a filename can be given,
> >e.g., for backing files. Using this should obviously be the exception,
> >but it is nice to have if actually needed.
> 
> Ping – I do understand that Kevin has reservations against this
> series, but as long as he doesn't explicitly ask me to reimplement
> this in bdrv_open() without an own block driver (which I'd more or
> less gladly do), I do not see issues why this series should not be
> merged.

I haven't reviewed it further because it seems like a kludge (that we
have to keep supporting once it's merged).  Was hoping you and Kevin
will come up with a long-term fix instead.

Kevin: Any new ideas on this patch series?

Stefan