Re: [patch v1, kernel version 3.2.1] Source mode for macvlaninteraface

[Eric Dumazet]

Le lundi 23 janvier 2012 Ã 13:30 +0100, Stefan Gula a Ãcrit :

> +static void macvlan_forward_sources_one(struct sk_buff *skb,
> +					struct macvlan_dev *vlan)
> +{
> +	struct sk_buff *nskb;
> +	struct net_device *dev;
> +	int len;
> +	int ret;
> +
> +	dev = vlan->dev;
> +	if (unlikely(!(dev->flags & IFF_UP)))
> +		return;
> +
> +	nskb = skb_clone(skb, GFP_ATOMIC);
> +	if (!nskb)
> +		return;
> +
> +	len = nskb->len + ETH_HLEN;
> +	nskb = skb_share_check(nskb, GFP_ATOMIC);
> +	if (!nskb)
> +		return;

I am trying to understand how/why skb_share_check() is needed/useful
after skb_clone() ...



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