BMAPALLOC
err = BMAPALLOC(dp, (u_offset_t)slotp->offset,
err = BMAPALLOC(ip, (u_offset_t)0, DIRBLKSIZ, cr);
err = BMAPALLOC(oip, length - 1, (int)fs->fs_bsize, cr);
err = BMAPALLOC(oip, length - 1, boff, cr);
err = BMAPALLOC(oip, length - 1, boff, cr);