Re: [Qemu-devel] [PATCH] qemu-img: adding a "-F base_fmt" option to "qemu-img create -b"

[Uri Lublin]

Anthony Liguori wrote:
> > From: Uri Lublin <address@hidden>
> >
> > If the user specifies the backing file format,
> > then when opening the backing file, there is no need
> > to probe the (backing file) image to figure out its format.
> >
> > This follows my previous patch implementing fmt:FMT: prefix for backing
> > filename.
> >   
>
> But how does this work in the absence of supporting fmt:FMT?  Does this 
> imply that the other patch is needed too?

Yes, This patch only has meaning if the fmt:FMT: patch is accepted.

Its purpose is to give the user a way to specify the backing file format ('-F 
FMT') without using specific implementation details (prefixing the backing-file 
filename with 'fmt:FMT:' )

Suggested by Daniel P. Berrange.

Thanks,
    Uri.