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Re: [Qemu-devel] [RFC] introduce a dynamic library to expose qemu block

From: Daniel P. Berrange
Subject: Re: [Qemu-devel] [RFC] introduce a dynamic library to expose qemu block API
Date: Wed, 18 Jul 2012 16:35:43 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

On Wed, Jul 18, 2012 at 02:58:46PM +0100, Daniel P. Berrange wrote:
> On Wed, Jul 18, 2012 at 04:51:03PM +0800, Wenchao Xia wrote:
> >   Hi, following is API draft, prototypes were taken from qemu/block.h,
> > and the API prefix is changed frpm bdrv to qbdrvs, to declare related
> > object is BlockDriverState, not BlockDriver. One issue here is it may
> > require include block_int.h, which is not LGPL2 licensed yet.
> >   API format is kept mostly the same with qemu generic block layer, to
> > make it easier for implement, and easier to make qemu migrate on it if
> > possible.
> How is error reporting dealt with, and what is the intent around
> thread safety of the APIs ?  I'd like to see a fully thread safe
> API - multiple threads can use the same 'BlockDriverState *'
> concurrently, and thread-local error reporting.

Oh, and will this library depend on glib, and will it have the
abort-on-oom behaviour QEMU has ? From a libvirt POV, we won't
use any library that aborts-on-oom.

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