[dpdk-dev] [PATCH v2] net/tap: fix the vdev data sharing for tun

[Vipin Varghese]

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

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

Cc: zhihong.w...@intel.com
Cc: ferruh.yi...@intel.com

Signed-off-by: Vipin Varghese <vipin.vargh...@intel.com>
---

Changes in V2:
- removal of To Do comment - Keith Wiles, Ferruh Yigit
---
 drivers/net/tap/rte_eth_tap.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index 8d8f67b..41300a6 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -1650,6 +1650,7 @@ 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;
 
        strcpy(tuntap_name, "TUN");
 
@@ -1657,6 +1658,17 @@ 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;
+               }
+               eth_dev->dev_ops = &ops;
+               return 0;
+       }
+
        snprintf(tun_name, sizeof(tun_name), "%s%u",
                 DEFAULT_TUN_NAME, tun_unit++);
 
-- 
2.7.4