[PATCHSET] support FSCTL_DUPLICATE_EXTENTS_TO_FILE

[Aurélien Aptel]

Hi

It's been around a year since I last looked at this but it seems we are
changing the VFS API here (adding a flag param to the copy chunk vfs
function) shouldn't the version be bumped?

I've attended Jeremy's VFS talk last week at SambaXP and he mentionned
we should be careful about changing that API and generally avoid
breaking things, similar to the kernel.

I hate to be this guy but I think this might be better as a new
VFS function.

-- 
Aurélien Aptel / SUSE Labs Samba Team
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