Re: [PATCH] cifs: add ioctl for SRV_COPYCHUNK range

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patch removed
On Wed, Sep 5, 2018 at 9:30 AM Steve French <smfrench@xxxxxxxxx> wrote:
>
> On Tue, Sep 4, 2018 at 9:11 AM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> >
> > On Mon, Sep 03, 2018 at 04:57:33PM +1000, Ronnie Sahlberg wrote:
> > > Add a new ioctl for COPYCHUNK that copies a region. The existing
> > > COPYCHUNK can only be used to copy a whole file.
> >
> > Please don't add magic ioctls and reuse the existing kernel copy
> > offload functionality.
>
> The existing kernel copy offload syscall does overlap the proposed
> ioctl, so until
> additional feature rich SMB3 copy offload mechanisms are added  (ODX might
> be a good example) require interface features not supported by the syscall
> (and thus require a cifs specific ioctl), we might as well avoid confusion
> and drop this patch.
>
> Now if any useful copy tools (rsync, gio copy etc.) actually used the copy
> syscall that would be even better - but that is a different problem ...
> --
> Thanks,
>
> Steve



-- 
Thanks,

Steve



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