[PATCH v2 3/4] examples/ipsec-secgw: fix buffer free logic in vector mode

[Nithin Dabilpuram <ndabilpuram@marvell.com>]

Fix packet processing to skip after mbuf is freed instead of
touching and Tx'ing it.

Also free vector event buffer in event worker when after processing
there is no pkt to be enqueued to Tx adapter.

Fixes: 86738ebe1e3d ("examples/ipsec-secgw: support event vector")
Cc: schalla@marvell.com
Cc: stable@dpdk.org

Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
---
 examples/ipsec-secgw/ipsec_worker.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/examples/ipsec-secgw/ipsec_worker.c b/examples/ipsec-secgw/ipsec_worker.c
index e9493c5..8639426 100644
--- a/examples/ipsec-secgw/ipsec_worker.c
+++ b/examples/ipsec-secgw/ipsec_worker.c
@@ -205,12 +205,16 @@ check_sp_sa_bulk(struct sp_ctx *sp, struct sa_ctx *sa_ctx,
 			ip->pkts[j++] = m;
 		else {
 			sa = *(struct ipsec_sa **)rte_security_dynfield(m);
-			if (sa == NULL)
+			if (sa == NULL) {
 				free_pkts(&m, 1);
+				continue;
+			}
 
 			/* SPI on the packet should match with the one in SA */
-			if (unlikely(sa->spi != sa_ctx->sa[res - 1].spi))
+			if (unlikely(sa->spi != sa_ctx->sa[res - 1].spi)) {
 				free_pkts(&m, 1);
+				continue;
+			}
 
 			ip->pkts[j++] = m;
 		}
@@ -536,6 +540,7 @@ ipsec_ev_route_pkts(struct rte_event_vector *vec, struct route_table *rt,
 				RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL)) {
 				RTE_LOG(ERR, IPSEC, "SA type not supported\n");
 				free_pkts(&pkt, 1);
+				continue;
 			}
 			rte_security_set_pkt_metadata(sess->security.ctx,
 						sess->security.ses, pkt, NULL);
@@ -695,11 +700,13 @@ ipsec_ev_vector_process(struct lcore_conf_ev_tx_int_port_wrkr *lconf,
 		ret = process_ipsec_ev_outbound_vector(&lconf->outbound,
 						       &lconf->rt, vec);
 
-	if (ret > 0) {
+	if (likely(ret > 0)) {
 		vec->nb_elem = ret;
 		rte_event_eth_tx_adapter_enqueue(links[0].eventdev_id,
 						 links[0].event_port_id,
 						 ev, 1, 0);
+	} else {
+		rte_mempool_put(rte_mempool_from_obj(vec), vec);
 	}
 }
 
@@ -720,6 +727,8 @@ ipsec_ev_vector_drv_mode_process(struct eh_event_link_info *links,
 		rte_event_eth_tx_adapter_enqueue(links[0].eventdev_id,
 						 links[0].event_port_id,
 						 ev, 1, 0);
+	else
+		rte_mempool_put(rte_mempool_from_obj(vec), vec);
 }
 
 /*
-- 
2.8.4