Re: [dpdk-dev] [PATCH] kni: set kni mac on ioctl_create

[Sergey Balabanov <balabanovsv@ecotelecom.ru>]

Hi,

Probably I missed something in understanding why the mac is not set on kni 
creation. Any comments would be highly appreciated.

Thanks,
Sergey

On Friday 28 August 2015 16:06:27 Sergey Balabanov wrote:
> There is a situation when ioctl returns zero mac address (00:00:00:00:00:00)
> for just created kni. The situation happens because kni mac is set on
> 'ipconfig up' event (kni_net_open callback) not on kni creation
> (kni_ioctl_create).
> 
> Signed-off-by: Sergey Balabanov <balabanovsv@ecotelecom.ru>
> ---
>  lib/librte_eal/linuxapp/kni/kni_misc.c | 10 ++++++++++
>  lib/librte_eal/linuxapp/kni/kni_net.c  |  9 ---------
>  2 files changed, 10 insertions(+), 9 deletions(-)
> 
> diff --git a/lib/librte_eal/linuxapp/kni/kni_misc.c
> b/lib/librte_eal/linuxapp/kni/kni_misc.c index 2e9fa89..61f83a0 100644
> --- a/lib/librte_eal/linuxapp/kni/kni_misc.c
> +++ b/lib/librte_eal/linuxapp/kni/kni_misc.c
> @@ -28,6 +28,7 @@
>  #include <linux/pci.h>
>  #include <linux/kthread.h>
>  #include <linux/rwsem.h>
> +#include <linux/etherdevice.h> /* eth_type_trans */
> 
>  #include <exec-env/rte_kni_common.h>
>  #include "kni_dev.h"
> @@ -465,6 +466,15 @@ kni_ioctl_create(unsigned int ioctl_num, unsigned long
> ioctl_param) if (pci)
>  		pci_dev_put(pci);
> 
> +	if (kni->lad_dev)
> +		memcpy(net_dev->dev_addr, kni->lad_dev->dev_addr, ETH_ALEN);
> +	else
> +		/*
> +		 * Generate random mac address. eth_random_addr() is the newer
> +		 * version of generating mac address in linux kernel.
> +		 */
> +		random_ether_addr(net_dev->dev_addr);
> +
>  	ret = register_netdev(net_dev);
>  	if (ret) {
>  		KNI_ERR("error %i registering device \"%s\"\n",
> diff --git a/lib/librte_eal/linuxapp/kni/kni_net.c
> b/lib/librte_eal/linuxapp/kni/kni_net.c index ab5add4..b50b4cf 100644
> --- a/lib/librte_eal/linuxapp/kni/kni_net.c
> +++ b/lib/librte_eal/linuxapp/kni/kni_net.c
> @@ -70,15 +70,6 @@ kni_net_open(struct net_device *dev)
>  	struct rte_kni_request req;
>  	struct kni_dev *kni = netdev_priv(dev);
> 
> -	if (kni->lad_dev)
> -		memcpy(dev->dev_addr, kni->lad_dev->dev_addr, ETH_ALEN);
> -	else
> -		/*
> -		 * Generate random mac address. eth_random_addr() is the newer
> -		 * version of generating mac address in linux kernel.
> -		 */
> -		random_ether_addr(dev->dev_addr);
> -
>  	netif_start_queue(dev);
> 
>  	memset(&req, 0, sizeof(req));