A test program to verify FIEMAP_COW_FLAG via fiemap ioctl(2).

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
A test program to verify OCFS2 reflink ioctl(2) interface.

Signed-off-by: jeff <jeff@koala>
comments update.
Signed-off-by: Jie Liu <jeff.liu@oracle.com>