[dpdk-dev] [PATCH v2 4/4] net/af_packet: add 802.1Q (VLAN) support

[Charles (Chas) Williams]

AF_PACKET has some flags to check on the receive side for 802.1Q
information.  If present, we copy into the mbuf.  For transmit, we
insert any 802.1Q information into the packet before copying to the ring.

Signed-off-by: Charles (Chas) Williams <ciwillia at brocade.com>
---
 drivers/net/af_packet/rte_eth_af_packet.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/net/af_packet/rte_eth_af_packet.c b/drivers/net/af_packet/rte_eth_af_packet.c
index 6aa8132..ee51c17 100644
--- a/drivers/net/af_packet/rte_eth_af_packet.c
+++ b/drivers/net/af_packet/rte_eth_af_packet.c
@@ -161,6 +161,12 @@ eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 		pbuf = (uint8_t *) ppd + ppd->tp_mac;
 		memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));
 
+		/* check for vlan info */
+		if (ppd->tp_status & TP_STATUS_VLAN_VALID) {
+			mbuf->vlan_tci = ppd->tp_vlan_tci;
+			mbuf->ol_flags |= (PKT_RX_VLAN_PKT | PKT_RX_VLAN_STRIPPED);
+		}
+
 		/* release incoming frame and advance ring buffer */
 		ppd->tp_status = TP_STATUS_KERNEL;
 		if (++framenum >= framecount)
@@ -214,6 +220,14 @@ eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 			continue;
 		}
 
+		/* insert vlan info if necessary */
+		if (mbuf->ol_flags & PKT_TX_VLAN_PKT) {
+			if (rte_vlan_insert(&mbuf)) {
+				rte_pktmbuf_free(mbuf);
+				continue;
+			}
+		}
+
 		/* point at the next incoming frame */
 		if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
 		    (poll(&pfd, 1, -1) < 0))
-- 
2.1.4