Add two regression tests to make sure that FICLONERANGE and the splice
based copy_file_range actually flush all data and metadata to disk
before the call ends.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>