[PATCH 002/119] vfs: support FS_XFLAG_REFLINK and FS_XFLAG_COWEXTSIZE

[Christoph Hellwig]

On Thu, Jun 16, 2016 at 06:18:05PM -0700, Darrick J. Wong wrote:
> Introduce XFLAGs for the new XFS reflink inode flag and the CoW extent
> size hint, and actually plumb the CoW extent size hint into the fsxattr
> structure.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong at oracle.com>

Should go behind all the updates that are useful without any new
rmap or reflink functionality.  In fact it would be great if you
could send out a series with just those little fixes and cleanups
first.