NILFS_SEGMENTS_RO_ATTR
NILFS_SEGMENTS_RO_ATTR(segments_number);
NILFS_SEGMENTS_RO_ATTR(blocks_per_segment);
NILFS_SEGMENTS_RO_ATTR(clean_segments);
NILFS_SEGMENTS_RO_ATTR(dirty_segments);
NILFS_SEGMENTS_RO_ATTR(README);