Re: [PATCH nf,v2] netfilter: nf_tables: coalesce multiple notifications into one skbuff

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On Wed, Sep 02, 2020 at 05:04:43PM +0200, Phil Sutter wrote:
> On Wed, Sep 02, 2020 at 04:52:02PM +0200, Pablo Neira Ayuso wrote:
> [...]
> > +static void nft_commit_notify(struct net *net, u32 portid)
> > +{
> > +	struct sk_buff *batch_skb = NULL, *nskb, *skb;
> > +	unsigned char *data;
> > +	int len;
> > +
> > +	list_for_each_entry_safe(skb, nskb, &net->nft.notify_list, list) {
> > +		if (!batch_skb) {
> > +new_batch:
> > +			batch_skb = skb;
> > +			NFT_CB(batch_skb).report = NFT_CB(skb).report;
> 
> Is this assignment needed? NFT_CB() merely dereferences skb->cb, so
> after assigning 'batch_skb = skb', NFT_CB(batch_skb) == NFT_CB(skb), no?

That's right, thanks for reviewing.



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