[v2,20/22] net/tap: enable port detach on secondary process

  Previously, detach port on secondary process will mess primary
process and cause same device can't be attached again, by take
advantage of rte_eth_release_port_private, we can support this
with minor change.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---
 drivers/net/tap/rte_eth_tap.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)
  

> On Jun 20, 2018, at 9:00 PM, Qi Zhang <qi.z.zhang@intel.com> wrote:
> 
> Previously, detach port on secondary process will mess primary
> process and cause same device can't be attached again, by take
> advantage of rte_eth_release_port_private, we can support this
> with minor change.
> 
> Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
> ---
> drivers/net/tap/rte_eth_tap.c | 17 +++++++++++++++--
> 1 file changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
> index df396bfde..bb5f20b01 100644
> --- a/drivers/net/tap/rte_eth_tap.c
> +++ b/drivers/net/tap/rte_eth_tap.c
> @@ -1759,6 +1759,7 @@ rte_pmd_tap_probe(struct rte_vdev_device *dev)
> 		}
> 		/* TODO: request info from primary to set up Rx and Tx */
> 		eth_dev->dev_ops = &ops;
> +		eth_dev->device = &dev->device;
> 		rte_eth_dev_probing_finish(eth_dev);
> 		return 0;
> 	}
> @@ -1827,12 +1828,24 @@ rte_pmd_tap_remove(struct rte_vdev_device *dev)
> {
> 	struct rte_eth_dev *eth_dev = NULL;
> 	struct pmd_internals *internals;
> +	const char *name;
> 	int i;
> 
> +	name = rte_vdev_device_name(dev);
> 	/* find the ethdev entry */
> -	eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
> +	eth_dev = rte_eth_dev_allocated(name);
> 	if (!eth_dev)
> -		return 0;
> +		return -ENODEV;
> +
> +	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
> +		/* detach device on local pprocess only */
> +		if (strlen(rte_vdev_device_args(dev)) == 0)
> +			return rte_eth_dev_release_port_private(eth_dev);
> +		/**
> +		 * else this is a private device for current process
> +		 * so continue with normal detach scenario
> +		 */
> +	}

Acked-by: Keith Wiles<keith.wiles@intel.com> for this patch of the tap PMD.

> 
> 	internals = eth_dev->data->dev_private;
> 
> -- 
> 2.13.6
> 

Regards,
Keith