[Ocfs2-devel] [PATCH 09/29] vfs: combine the clone and dedupe into a single remap_file_range

[Darrick J. Wong]

On Thu, Oct 18, 2018 at 05:54:29AM +0100, Al Viro wrote:
> On Wed, Oct 17, 2018 at 09:47:18PM -0700, Darrick J. Wong wrote:
> 
> > > > +#define REMAP_FILE_DEDUP		(1 << 0)
> > > > +
> > > > +/*
> > > > + * These flags should be taken care of by the implementation (possibly using
> > > > + * vfs helpers) but can be ignored by the implementation.
> > > > + */
> > > > +#define REMAP_FILE_ADVISORY		(0)
> > > 
> > > ???
> > 
> > Sorry if this wasn't clear.  How about this?
> > 
> > /*
> >  * These flags signal that the caller is ok with altering various aspects of
> >  * the behavior of the remap operation.  The changes must be made by the
> >  * implementation; the vfs remap helper functions can take advantage of them.
> >  * Flags in this category exist to preserve the quirky behavior of the hoisted
> >  * btrfs clone/dedupe ioctls.
> >  */
> 
> Something like "currently we have no such flags, but some will appear
> in subsequent commits", removed once such flags do appear, perhaps?

Done.

--D