[dpdk-dev] [PATCH v1 2/3] lib/mirror: add port based mirroring

[Patrick Fu <patrick.fu@intel.com>]

This patch add port based mirroring support for the mirror lib.
The port based mirroring is unconditional traffic mirroring
between 2 ethdev ports.

Signed-off-by: Liang-min Wang <liang-min.wang@intel.com>
Signed-off-by: Patrick Fu <patrick.fu@intel.com>
Signed-off-by: Timothy Miskell <timothy.miskell@intel.com>
---
 lib/librte_mirror/rte_mirror.c | 57 ++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/lib/librte_mirror/rte_mirror.c b/lib/librte_mirror/rte_mirror.c
index f2a85976a..d2c0d8eab 100644
--- a/lib/librte_mirror/rte_mirror.c
+++ b/lib/librte_mirror/rte_mirror.c
@@ -196,6 +196,57 @@ mirror_pkt_update(struct rte_mbuf *pkt, uint16_t dst_vlan_id)
 	rte_mbuf_refcnt_update(pkt, 1);
 }
 
+static inline uint16_t
+mirror_port_cb(uint16_t qidx, struct rte_mbuf **pkts,
+	uint16_t nb_pkts, void *user_params)
+{
+	struct rte_mirror_param *data = user_params;
+	uint16_t i, dst_qidx;
+	uint16_t pkt_trans;
+	uint16_t dst_port_id = data->dst_port_id;
+	uint16_t dst_vlan_id = data->dst_vlan_id;
+
+	if (nb_pkts == 0)
+		return 0;
+
+	for (i = 0; i < nb_pkts; i++)
+		mirror_pkt_update(pkts[i], dst_vlan_id);
+
+	dst_qidx = data->n_dst_queue > qidx ? qidx : data->n_dst_queue - 1;
+
+	rte_spinlock_lock(&data->locks[dst_qidx]);
+	pkt_trans = rte_eth_tx_burst(dst_port_id, dst_qidx, pkts, nb_pkts);
+	rte_spinlock_unlock(&data->locks[dst_qidx]);
+	if (pkt_trans != nb_pkts)
+		RTE_ETHDEV_LOG(ERR, "%d packets for tapping but "
+			"only %d packet get through\n", nb_pkts, pkt_trans);
+
+	for (i = 0; i < nb_pkts; i++)
+		pkts[i]->ol_flags &= ~VLAN_INSERT_FLAG;
+
+	while (unlikely(pkt_trans < nb_pkts)) {
+		rte_pktmbuf_free(pkts[pkt_trans]);
+		pkt_trans++;
+	}
+
+	return nb_pkts;
+}
+
+static uint16_t
+mirror_rx_port_cb(uint16_t port_id __rte_unused, uint16_t qidx,
+	struct rte_mbuf **pkts, uint16_t nb_pkts,
+	uint16_t max_pkts __rte_unused, void *user_params)
+{
+	return mirror_port_cb(qidx, pkts, nb_pkts, user_params);
+}
+
+static uint16_t
+mirror_tx_port_cb(uint16_t port_id __rte_unused, uint16_t qidx,
+		struct rte_mbuf **pkts, uint16_t nb_pkts, void *user_params)
+{
+	return mirror_port_cb(qidx, pkts, nb_pkts, user_params);
+}
+
 int
 rte_mirror_offload_register(uint16_t src_port,
 		struct rte_mirror_param *param, int tx_cb)
@@ -221,6 +272,12 @@ rte_mirror_offload_register(uint16_t src_port,
 	}
 
 	switch (data->mirror_type) {
+	case rte_mirror_type_port:
+		if (tx_cb)
+			tx_fn = mirror_tx_port_cb;
+		else
+			rx_fn = mirror_rx_port_cb;
+		break;
 	default:
 		MIRROR_LOG(ERR, "Un-supported mirror offloading type!!!\n");
 		return -ENOTSUP;
-- 
2.18.4