Re: [Qemu-devel] [PATCH v4 0/6] Efficient VM backup for qemu

[Dietmar Maurer]

> > So if I want to use the code from nbd.c, I need to write a specialized
> > BlockDriver for the vma format (to pass that to nbd_export_new())?
> 
> Yes.  But I believe that would be a good thing to do anyway.  For one thing, 
> it
> gives you "automatic" coverage via qemu-iotests.

But the only thing I can do with vma is sequential writes with 64K block size. 
So
using qemu-iotests will not work anyways.

I thought I can simply impl. a callback which gets called instead of using a 
BlockDriver?