netdev - Re: [RFC PATCH] NET: Clone the sk

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Date:	Thu, 03 Jan 2008 15:40:07 -0800
From:	Joe Perches <joe@...ches.com>
To:	Paul Moore <paul.moore@...com>
Cc:	David Miller <davem@...emloft.net>, jarkao2@...il.com,
	hadi@...erus.ca, netdev@...r.kernel.org
Subject: Re: [RFC PATCH] NET: Clone the sk_buff->iif field properly

On Thu, 2008-01-03 at 18:13 -0500, Paul Moore wrote:
> static struct sk_buff *__skb_clone(struct sk_buff *n, struct sk_buff 
> *skb)
> {
> #define C(x) n->x = skb->x
> 
> 	n->next = n->prev = NULL;
> 	n->sk = NULL;
> 	__copy_skb_header(n, skb);
> 
> 	C(len);
> 	C(data_len);
> 	C(mac_len);
> 	n->hdr_len = skb->nohdr ? skb_headroom(skb) : skb->hdr_len;
> 	n->cloned = 1;
> 	n->nohdr = 0;
> 	n->destructor = NULL;
> 	C(iif);
> 	C(tail);
> 	C(end);
> 	C(head);
> 	C(data);
> 	C(truesize);
> 	atomic_set(&n->users, 1);
> 
> 	atomic_inc(&(skb_shinfo(skb)->dataref));
> 	skb->cloned = 1;
> 
> 	return n;
> #undef C

Perhaps move the skb->cloned = 1 to just after n->cloned = 1
or
	skb->cloned = n->cloned = 1;
or maybe
	skb->cloned = 1;
	C(cloned);

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