fsck.gfs2: metawalk was not checking many directories
    
    The fsck.gfs2 program was not checking the directory hash tables
    of many subdirectories.  It was checking the leaf blocks, but
    it wasn't checking the hash table block pointers if the height
    value was equal to 0, which means every directory with a small
    number of leaf blocks.  That means before, you could have all
    kinds of directory corruption and never know it.
    
    rhbz#455300