Function create_segmented_mbuf

dpdk/app/test/test_cryptodev.h:181–239

}

static inline struct rte_mbuf *
create_segmented_mbuf(struct rte_mempool *mbuf_pool, int pkt_len,
		int nb_segs, uint8_t pattern) {

	struct rte_mbuf *m = NULL, *mbuf = NULL;
	uint8_t *dst;
	int data_len = 0;
	int i, size;
	int t_len;

	if (pkt_len < 1) {
		printf("Packet size must be 1 or more (is %d)\n", pkt_len);
		return NULL;
	}

	if (nb_segs < 1) {
		printf("Number of segments must be 1 or more (is %d)\n",
				nb_segs);
		return NULL;
	}

	t_len = pkt_len >= nb_segs ? pkt_len / nb_segs : 1;
	size = pkt_len;

	/* Create chained mbuf_src and fill it generated data */
	for (i = 0; size > 0; i++) {

		m = rte_pktmbuf_alloc(mbuf_pool);
		if (i == 0)
			mbuf = m;

		if (m == NULL) {
			printf("Cannot create segment for source mbuf");
			goto fail;
		}

		/* Make sure if tailroom is zeroed */
		memset(m->buf_addr, pattern, m->buf_len);

		data_len = size > t_len ? t_len : size;
		dst = (uint8_t *)rte_pktmbuf_append(m, data_len);
		if (dst == NULL) {
			printf("Cannot append %d bytes to the mbuf\n",
					data_len);
			goto fail;
		}

		if (mbuf != m)
			rte_pktmbuf_chain(mbuf, m);

		size -= data_len;

	}
	return mbuf;

fail:
	rte_pktmbuf_free(mbuf);
	return NULL;