[Sheepdog] Bug: snapshot causes vdi attributes to be lost

[MORITA Kazutaka]

At Thu, 28 Jul 2011 12:14:34 +0100,
Chris Webb wrote:
> 
> With current git HEAD and the sheepdog driver in qemu-kvm 0.14.1:
> 
>   # qemu-img create sheepdog:foo 100
>   Formatting 'sheepdog:foo', fmt=raw size=100 
>   # collie vdi setattr foo wibble wobble
>   # collie vdi getattr foo wibble; echo
>   wobble
> 
> All good so far. However, after I take a snapshot,
> 
>   # qemu-img snapshot -c '' sheepdog:foo
>   # collie vdi list foo                
>     name        id    size    used  shared    creation time   vdi id
>   ------------------------------------------------------------------
>   s foo          1  0.0 MB  0.0 MB  0.0 MB 2011-07-28 11:05   d9d577
>     foo          2  0.0 MB  0.0 MB  0.0 MB 2011-07-28 11:07   d9d578
>   # collie vdi getattr foo wibble
>   no such attribute, wibble
>   # collie vdi getattr -s 1 foo wibble
>   no such attribute, wibble
>   # collie vdi getattr -s 2 foo wibble
>   no such attribute, wibble
> 
> So it seems to have vanished, neither being attached to the snapshot nor the
> head of the vdi.

Thanks for your report.  I'll send a fix soon.

Thanks,

Kazutaka