cgd_cipher
cgd_cipher(sc, buf, va, nbytes, blkno, blksize, CGD_CIPHER_ENCRYPT);
cgd_cipher(sc, cx->cx_dstv, cx->cx_srcv, cx->cx_len,
cgd_cipher(&sc, buf, buf, txtlen, selftests[i].blkno,
cgd_cipher(&sc, buf, buf, txtlen, selftests[i].blkno,
static void cgd_cipher(struct cgd_softc *, void *, const void *,