[dpdk-dev] [PATCH] net/tap: fix the vdev data sharing for tun

[Vipin Varghese <vipin.varghese@intel.com>]

Fixes: ee27edbe0c10 ("drivers/net: share vdev data to secondary process")

Enables TUN PMD sharing by attaching the port from the shared data.

Cc: zhihong.wang@intel.com
Cc: ferruh.yigit@intel.com

Signed-off-by: Vipin Varghese <vipin.varghese@intel.com>
---
---
 drivers/net/tap/rte_eth_tap.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index db397d6..ea6d899 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -1657,6 +1657,7 @@ rte_pmd_tun_probe(struct rte_vdev_device *dev)
 	struct rte_kvargs *kvlist = NULL;
 	char tun_name[RTE_ETH_NAME_MAX_LEN];
 	char remote_iface[RTE_ETH_NAME_MAX_LEN];
+	struct rte_eth_dev *eth_dev;
 
 	tap_type = 0;
 	strcpy(tuntap_name, "TUN");
@@ -1665,6 +1666,18 @@ rte_pmd_tun_probe(struct rte_vdev_device *dev)
 	params = rte_vdev_device_args(dev);
 	memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
 
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
+	    strlen(params) == 0) {
+		eth_dev = rte_eth_dev_attach_secondary(name);
+		if (!eth_dev) {
+			TAP_LOG(ERR, "Failed to probe %s", name);
+			return -1;
+		}
+		/* TODO: request info from primary to set up Rx and Tx */
+		eth_dev->dev_ops = &ops;
+		return 0;
+	}
+
 	snprintf(tun_name, sizeof(tun_name), "%s%u",
 		 DEFAULT_TUN_NAME, tun_unit++);
 
-- 
2.7.4