[Samba] Samba and BTRFS server-side copy

[Jeremy Allison]

On Fri, Oct 28, 2016 at 12:08:50AM +0200, Saint Germain via samba wrote:
> On Thu, 27 Oct 2016 14:50:48 -0700, Jeremy Allison <jra at samba.org>
> wrote :
> > 
> > Server-side copy can be requested using smbclient, using
> > the "scopy" command.
> > 
> > It's a simple:
> > 
> > scopy source dest
> 
> Thanks but I just tested and it doesn't trigger BTRFS_IOC_CLONE_RANGE.
> The server-side copy is working all right, but the file is not copied
> through BTRFS reflink (cp --reflink=auto).
> It is quite noticeable on large file, where it should be nearly
> instantaneous.
> 
> My configuration:
>  - client: Debian Stable + smbclient 4.4.6 (coming from Testing) +
>    kernel 4.7 (amd64)
>  - server: Debian Stable + samba 4.2.10 + kernel 4.7 (amd64)

OK, follow though using debug level 10 and see why it isn't
selecting the reflink code.

Are you using SMB2 ?