[Libguestfs] [PATCH 1/3] mllib: add checking for btrfs subvolume

[Richard W.M. Jones]

On Thu, Jul 07, 2016 at 06:04:04PM +0200, Pino Toscano wrote:
> On Thursday 07 July 2016 16:54:20 Richard W.M. Jones wrote:
> > How about this, which is type safe and a lot simpler:
> > 
> > let is_btrfs_subvolume g fs =
> >   let device = g#mountable_device fs in
> >   try
> >     ignore (g#mountable_subvolume fs); true
> >   with Guestfs.Error msg as exn ->
> >     if g#last_errno () = Guestfs.Errno.errno_EINVAL then false
> >     else raise exn
> 
> This is what I was writing too, but you were faster :)
> I think this will fail to build as "device" is unused, so the first
> line should be:
> 
>   (* Make sure we can determine the device of the mountable. *)
>   ignore (g#mountable_device fs);

Actually I believe Maxim can just drop the 'let device = ...' line
completely.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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