Function cpu_inb_pkt_prepare

dpdk/lib/ipsec/esp_inb.c:754–811

* Prepare (plus actual crypto/auth) routine for inbound CPU-CRYPTO * (synchronous mode). */

 * (synchronous mode).
 */
uint16_t
cpu_inb_pkt_prepare(const struct rte_ipsec_session *ss,
	struct rte_mbuf *mb[], uint16_t num)
{
	int32_t rc;
	uint32_t i, k;
	struct rte_ipsec_sa *sa;
	struct replay_sqn *rsn;
	union sym_op_data icv;
	struct rte_crypto_va_iova_ptr iv[num];
	struct rte_crypto_va_iova_ptr aad[num];
	struct rte_crypto_va_iova_ptr dgst[num];
	uint32_t dr[num];
	uint32_t l4ofs[num];
	uint32_t clen[num];
	uint64_t ivbuf[num][IPSEC_MAX_IV_QWORD];

	sa = ss->sa;

	/* grab rsn lock */
	rsn = rsn_acquire(sa);

	/* do preparation for all packets */
	for (i = 0, k = 0; i != num; i++) {

		/* calculate ESP header offset */
		l4ofs[k] = mb[i]->l2_len + mb[i]->l3_len;

		/* prepare ESP packet for processing */
		rc = inb_pkt_prepare(sa, rsn, mb[i], l4ofs[k], &icv);
		if (rc >= 0) {
			/* get encrypted data offset and length */
			clen[k] = inb_cpu_crypto_prepare(sa, mb[i],
				l4ofs + k, rc, ivbuf[k]);

			/* fill iv, digest and aad */
			iv[k].va = ivbuf[k];
			aad[k].va = icv.va + sa->icv_len;
			dgst[k++].va = icv.va;
		} else {
			dr[i - k] = i;
			rte_errno = -rc;
		}
	}

	/* release rsn lock */
	rsn_release(sa, rsn);

	/* copy not prepared mbufs beyond good ones */
	if (k != num && k != 0)
		move_bad_mbufs(mb, dr, num, num - k);

	/* convert mbufs to iovecs and do actual crypto/auth processing */
	if (k != 0)
		cpu_crypto_bulk(ss, sa->cofs, mb, iv, aad, dgst,
			l4ofs, clen, k);
	return k;
}