Re: [Qemu-devel] [PATCH v2] blkdebug: make the fault injection functionality callable from QMP

[Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>]

Hi Stefan, Eric, Sorry for my late reply.

At Tue, 2 Sep 2014 16:29:14 +0100,
Stefan Hajnoczi wrote:
> 
> [1  <text/plain; us-ascii (quoted-printable)>]
> On Thu, Aug 28, 2014 at 03:18:48PM +0900, Hitoshi Mitake wrote:
> > At Wed, 27 Aug 2014 06:43:49 -0600,
> > Eric Blake wrote:
> > > 
> > > [1  <text/plain; UTF-8 (quoted-printable)>]
> > > On 08/26/2014 11:34 PM, Hitoshi Mitake wrote:
> > > Actually, if you use a type-safe qapi definition, you may not even need
> > > to do raw qdict operations, but can just directly use the C struct that
> > > gets generated as a result of the qapi.
> > > 
> > > 
> > > > 
> > > > I also like the detailed specification. But, there are bunch of event
> > > > names (the event_names array of block/blkdebug.c). In addition, the
> > > > rule of blkdebug can be extended. So I think defining it in two palces
> > > > (qapi-schema.json and block/blkdebug.c) is hard to maintain. Parsing
> > > > qdict in blkdebug.c would be simpler. How do you think?
> > > 
> > > No, don't do duplication.  Instead, fix blkdebug.c to USE the enum
> > > generated by the .json, and you only have to maintain the list in one
> > > place - the .json file.
> > > 
> > 
> > OK, I understand your opinion. But it requires amount of change in
> > existing blkdebug implementation. So I want to hear opinions from the
> > maintainers. How do you think about this idea (maintaining blkdebug
> > events in .json format for avoiding duplication), Stefan and Kevin?
> 
> It would be nice to specify the rule syntax using qapi JSON.
> 
> I'm not sure if we can eliminate the QemuOptsList but it's probably
> possible to avoid qdict or ini file parsing and instead use qapi
> visitors to convert input to C structs.
> 
> It's worth a try.

OK, I'll do it in v3.

Thanks,
Hitoshi

> 
> Stefan
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>