Test copy up files from lower dir that are <, =, > 4G in size.
Kernel commit 0480334fa604 ("ovl: use O_LARGEFILE in ovl_copy_up()")
fixed bug when copying up large file(>4G) from lower dir.
Signed-off-by: Eryu Guan <eguan@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Eryu Guan