dbtofsb
nfno = dbtofsb(&sblock, ep->nbno);
fssize_frag = (int64_t)dbtofsb(&sblock, fssize_db);
frags = dbtofsb(&sblock, dp->di_blocks);
new_fs_ncg = howmany(dbtofsb(&sblock, fssize_db), sblock.fs_fpg);
nfno = dbtofsb(fs, ep->nbno);
logbno = dbtofsb(fs, bno);
sp->f_bfree += dbtofsb(ufsvfsp->vfs_fs,
daddr_t frags = dbtofsb(ip->i_fs, ip->i_blocks);
err = bmap_set_bn(vp, off, dbtofsb(fs, -bn));