netdev - Re: [Patch net] macvlan: add NETIF_F_NETNS

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Message-ID: <1392097099.6615.74.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Mon, 10 Feb 2014 21:38:19 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Cong Wang <cwang@...pensource.com>
Cc:	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Cong Wang <xiyou.wangcong@...il.com>,
	netdev <netdev@...r.kernel.org>,
	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [Patch net] macvlan: add NETIF_F_NETNS_LOCAL flag

On Mon, 2014-02-10 at 21:37 -0800, Eric Dumazet wrote:

> 
> Simple patch would be :
> 
> diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
> index 048dc8d183aa..31bbba34fd1e 100644
> --- a/net/core/rtnetlink.c
> +++ b/net/core/rtnetlink.c
> @@ -963,6 +963,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
>  	    nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
>  #endif
>  	    (dev->ifindex != dev->iflink &&
> +	     __dev_get_by_index(dev_net(dev), dev->iflink) &&
>  	     nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
>  	    (upper_dev &&
>  	     nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
> 

Hmm, not enough.

We probably need to keep a pointer to iflink net structure.



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