EXTENT_STATUS_REFERENCED
es->es_pblk |= ((ext4_fsblk_t)EXTENT_STATUS_REFERENCED) << ES_SHIFT;
es->es_pblk &= ~(((ext4_fsblk_t)EXTENT_STATUS_REFERENCED) << ES_SHIFT);
return (ext4_es_status(es) & EXTENT_STATUS_REFERENCED) != 0;
{ EXTENT_STATUS_REFERENCED, "R" })