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

[Al Viro]

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?