_need_to_be_root
# Since xfs_io's fiemap always use SYNC flag and can't be unset,
# we must use filefrag to call fiemap without SYNC flag.
-_require_command "/usr/sbin/filefrag"
+_require_command "/usr/sbin/filefrag" filefrag
_require_xfs_io_command "falloc"
filesize=$((10 * 1024 * 1024 * 1024)) #10G size