On Mon, Sep 05, 2016 at 07:56:22AM -0700, Christoph Hellwig wrote: > On Thu, Aug 25, 2016 at 04:31:00PM -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. > > Just curious, but why would we even bother to expose the reflink flag > to userspace? So far I've put the reflink flag to use in xfs_scrub to look for obvious signs of brokenness such as extents that overlap or have the shared flag set but the inode flag is off; and to skip various kinds of checks that don't have to happen when blocks don't overlap. I doubt there's much of a use for the flag outside of the XFS utilities. For a while I pondered only exposing the fsxattr flag if the caller had CAP_SYS_ADMIN (the level of priviledge required to run scrub) but decided that I wouldn't change the existing interface like that unless I had a really good reason. --D -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
