[PATCHSET] support FSCTL_DUPLICATE_EXTENTS_TO_FILE

[David Disseldorp]

On Thu, 11 May 2017 00:25:02 -0700, Christoph Hellwig wrote:

> > Don't use copy_file_range if you want to clone.  IOC_CLONE_RANGE is
> > always the better choice if supported.  
> 
> As I haven't seen any follow up here:  Can we please move the
> IOC_CLONE_RANGE support out of the btrfs module as it's a general Linux
> API, and can't just be replace with copy_file_range?

I've raised https://bugzilla.samba.org/show_bug.cgi?id=12785 to track
this.

Cheers, David