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

[Thomas Monjalon <thomas.monjalon@6wind.com>]

Helin,
You have probably missed this (old) patch / bug report.

2015-08-28 16:08, Sergey Balabanov:
> 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));