ZFS in jails 9.2-RC1 permission denied

[Mark Felder]

On Thu, Aug 8, 2013, at 6:59, Trond Endrestøl wrote:
> 
> I'm just guessing, but I doubt a jail would be able to create new ZFS 
> filesystems outside its own structure, if at all able. A jail would 
> however be allowed to (un)mount already existing filesystems within 
> its own structure, i.e. Pool/test1.
> 

When I first reviewed his post I clearly confused "mounting" with
"creating a new zfs filesystem". Is that even supposed to be permitted
in a jail? I almost feel a sysctl disabling that by default would be
nice... DoS by zfs filesystem creation/deletion, anyone?