Does your application depend on, or report, free disk space? Re: F20 Self Contained Change: OS Installer Support for LVM Thin Provisioning

[David Lehman]

On Fri, 2013-07-26 at 22:59 +0200, Miloslav Trmač wrote:
> On Fri, Jul 26, 2013 at 10:17 PM, DJ Delorie <dj at redhat.com> wrote:
> >
> >> If your package reports disk space usage to users, and bases this on
> >> filesystem free space, please consider whether it might need to take
> >> LVM thin provisioning into account.
> >
> > Perhaps you could include a small code snippet explaining *how* to do
> > this?  Is there an lvm_thin_statfs() we can use?
> 
> I'd love to, but I don't know how.  David, could you suggest something, please?

As noted by drago01, this is not exactly new or specific to thinp -- a
similar situation exists with btrfs. You would have to ask the
developers of lvm and btrfs for a way to decode the magic. I don't know
any manageable solution to this problem.

>     Mirek