[dpdk-dev] [PATCH] af_packet: make the device detachable

[Iremonger, Bernard]

Hi Wojciech,


> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Wojciech Zmuda
> Sent: Tuesday, January 5, 2016 2:05 PM
> To: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH] af_packet: make the device detachable
> 
> Fix memory leak when detaching virtual device. Set dev_flags to
> RTE_ETH_DEV_DETACHABLE and implement pmd_af_packet_drv.uninit
> method.
> Copy device name to ethdev->data to make it compatibile with

Typo, compatibile should be compatible.

> rte_eth_dev_allocated().
> 
> Signed-off-by: Wojciech Zmuda <woz at semihalf.com>
> ---
>  drivers/net/af_packet/rte_eth_af_packet.c | 29
> ++++++++++++++++++++++++++++-
>  1 file changed, 28 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/af_packet/rte_eth_af_packet.c
> b/drivers/net/af_packet/rte_eth_af_packet.c
> index 767f36b..7ef65ff 100644
> --- a/drivers/net/af_packet/rte_eth_af_packet.c
> +++ b/drivers/net/af_packet/rte_eth_af_packet.c
> @@ -667,11 +667,13 @@ rte_pmd_init_internals(const char *name,
>  	data->nb_tx_queues = (uint16_t)nb_queues;
>  	data->dev_link = pmd_link;
>  	data->mac_addrs = &(*internals)->eth_addr;
> +	strncpy(data->name,
> +		(*eth_dev)->data->name, strlen((*eth_dev)->data-
> >name));
> 
>  	(*eth_dev)->data = data;
>  	(*eth_dev)->dev_ops = &ops;
>  	(*eth_dev)->driver = NULL;
> -	(*eth_dev)->data->dev_flags = 0;
> +	(*eth_dev)->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
>  	(*eth_dev)->data->drv_name = drivername;
>  	(*eth_dev)->data->kdrv = RTE_KDRV_NONE;
>  	(*eth_dev)->data->numa_node = numa_node; @@ -836,10 +838,35
> @@ exit:
>  	return ret;
>  }
> 
> +static int
> +rte_pmd_af_packet_devuninit(const char *name) {
> +	struct rte_eth_dev *eth_dev = NULL;
> +
> +	RTE_LOG(INFO, PMD, "Closing AF_PACKET ethdev on numa socket
> %u\n",
> +			rte_socket_id());
> +
> +	if (name == NULL)
> +		return -1;
> +
> +	/* reserve an ethdev entry */

Above comment should be 	/* find the ethdev entry */

> +	eth_dev = rte_eth_dev_allocated(name);
> +	if (eth_dev == NULL)
> +		return -1;
> +

In rte_pmd_init_internals() memory is allocated for rx and tx queues this should also be freed.

Line 606: rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
Line 620:tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);

	rte_free((*internals)->rx_queue[q].rd);
	rte_free((*internals)->tx_queue[q].rd);

> +	rte_free(eth_dev->data->dev_private);
> +	rte_free(eth_dev->data);
> +
> +	rte_eth_dev_release_port(eth_dev);
> +
> +	return 0;
> +}
> +
>  static struct rte_driver pmd_af_packet_drv = {
>  	.name = "eth_af_packet",
>  	.type = PMD_VDEV,
>  	.init = rte_pmd_af_packet_devinit,
> +	.uninit = rte_pmd_af_packet_devuninit,
>  };
> 
>  PMD_REGISTER_DRIVER(pmd_af_packet_drv);
> --
> 1.9.1