Re: [Qemu-devel] qemu: block.c: introducing "fmt:FMT:" prefix to image-filenames

[Anthony Liguori]

Jamie Lokier wrote:
> Uri Lublin wrote:
>   
> > Daniel P. Berrange wrote:
> >     
> > > Yes the format you write into the qcow2 header can still use the 
> > > fmt:qcow2: prefix - just no need to expose that particular qcow2
> > > specific implementation detail on the CLI. 
> > >       
> > OK. I'll prepare a patch that adds '-F fmt' to 'qemu-img create -b ...'
> >     
>
> Will it break backing files whose filename begins with "fmt:"?
>
> Just because I hate hidden "some filenames work, some filenames break
> mysteriously, and of course it's not documented" dodgy hacks.
>   

I'm pretty certain that you couldn't do that today in QEMU.  The colon 
has always been used for protocol checking and if the protocol is 
invalid, I think we throw an error.

Regards,

Anthony Liguori

> -- Jamie
>
>
>