Since none of the current filesystems support reflinked swap files,
make sure that we prohibit reflinking of swapfiles and swapon of
reflinked files.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eryu Guan <eguan@redhat.com>