netdev - Re: [PATCH 1/4] flow: virtualize flow cache entry methods

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Date:	Mon, 5 Apr 2010 16:33:02 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Timo Teras <timo.teras@....fi>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 1/4] flow: virtualize flow cache entry methods

On Mon, Apr 05, 2010 at 10:00:21AM +0300, Timo Teras wrote:
>
> @@ -219,33 +222,32 @@ void *flow_cache_lookup(struct net *net, struct flowi *key, u16 family, u8 dir,
>  			fle->object = NULL;
>  			fcp->hash_count++;
>  		}
> +	} else if (fle->genid == atomic_read(&flow_cache_genid)) {
> +		flo = fle->object;
> +		if (!flo)
> +			goto ret_object;
> +		flo = flo->ops->get(flo);
> +		if (flo)
> +			goto ret_object;
>  	}
>  
>  nocache:
> -	{
> -		int err;
> -		void *obj;
> -		atomic_t *obj_ref;
> -
> -		err = resolver(net, key, family, dir, &obj, &obj_ref);
> -
> -		if (fle && !err) {
> -			fle->genid = atomic_read(&flow_cache_genid);
> -
> -			if (fle->object)
> -				atomic_dec(fle->object_ref);
> -
> -			fle->object = obj;
> -			fle->object_ref = obj_ref;
> -			if (obj)
> -				atomic_inc(fle->object_ref);
> +	flo = resolver(net, key, family, dir, fle ? fle->object : NULL, ctx);
> +	if (fle) {
> +		fle->genid = atomic_read(&flow_cache_genid);
> +		if (IS_ERR(flo)) {
> +			fle->genid--;
> +			fle->object = NULL;

Shouldn't we call fle->object->ops->delete here?

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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