dblksize
dsrch(ip->di_db[i], (ulong_t)dblksize(sblock, ip, i),
(int)dblksize(&sblock, dirp->ip, (int)lbn));
(size_t)dblksize(&sblock, dp, nxtbn - 1));
(int)dblksize(&sblock, dirp->ip, (int)lbn));
numfrags(&sblock, dblksize(&sblock, ip, blks));