netdev - Re: [PATCH 1/2] IPv6: conntrack: Use protocol-related initialization routine to initial queues of IPv6 connection track

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Date:	Tue, 26 Jan 2010 21:56:10 +0900 (JST)
From:	Yasuyuki KOZAKAI <yasuyuki.kozakai@...hiba.co.jp>
To:	shanwei@...fujitsu.com
Cc:	kaber@...sh.net, davem@...emloft.net,
	yasuyuki.kozakai@...hiba.co.jp, netfilter-devel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] IPv6: conntrack: Use protocol-related
 initialization routine to initial queues of IPv6 connection track


Patches looks good to me. But nf_ct_frag_match in the this patch
is added by [PATCH 2/2]. Subject mistake ?

-- Yasuyuki Kozakai

From: Shan Wei <shanwei@...fujitsu.com>
Date: Tue, 26 Jan 2010 10:31:10 +0800

> 
> IPv6 connection track and IPv6 stack separately use a different queue to 
> manage received fragments. The former uses nf_ct_frag6_queue structure, 
> the latter uses frag_queue structure.
> 
> When creating new queue for IPv6 connection track, ip6_frag_init() 
> that belongs to IPv6 stack is called to initial nf_ct_frag6_queue structure. 
> This broken the saddr&daddr member in nf_ct_frag6_queue, and then hash value 
> generated by nf_hashfn() is not equal with that generated by fq_find(). 
> So, a new received fragment can't be inserted to right queue.
>  
> The patch fixes the bug with protocol-related initialization routine.
> The patch-set have been tested.
> 
> 
> Signed-off-by: Shan Wei <shanwei@...fujitsu.com>
> ---
>  include/net/ipv6.h                      |    1 -
>  net/ipv6/netfilter/nf_conntrack_reasm.c |   13 ++++++++++++-
>  net/ipv6/reassembly.c                   |    3 +--
>  3 files changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/include/net/ipv6.h b/include/net/ipv6.h
> index cbd768b..a7112da 100644
> --- a/include/net/ipv6.h
> +++ b/include/net/ipv6.h
> @@ -364,7 +364,6 @@ struct ip6_create_arg {
>  	struct in6_addr *dst;
>  };
>  
> -void ip6_frag_init(struct inet_frag_queue *q, void *a);
>  
>  static inline int ipv6_addr_any(const struct in6_addr *a)
>  {
> diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
> index 66b6161..4a61d14 100644
> --- a/net/ipv6/netfilter/nf_conntrack_reasm.c
> +++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
> @@ -146,6 +146,17 @@ static void nf_ct_frag6_evictor(void)
>  	local_bh_enable();
>  }
>  
> +static void nf_ct_queue_init(struct inet_frag_queue *q, void *a)
> +{
> +	struct nf_ct_frag6_queue *fq;
> +	struct ip6_create_arg *arg = a;
> +
> +	fq = container_of(q, struct nf_ct_frag6_queue, q);
> +	fq->id = arg->id;
> +	ipv6_addr_copy(&fq->saddr, arg->src);
> +	ipv6_addr_copy(&fq->daddr, arg->dst);
> +}
> +
>  static int nf_ct_frag_match(struct inet_frag_queue *q, void *a)
>  {
>  	struct nf_ct_frag6_queue *fq;
> @@ -672,7 +683,7 @@ void nf_ct_frag6_output(unsigned int hooknum, struct sk_buff *skb,
>  int nf_ct_frag6_init(void)
>  {
>  	nf_frags.hashfn = nf_hashfn;
> -	nf_frags.constructor = ip6_frag_init;
> +	nf_frags.constructor = nf_ct_frag_init;
>  	nf_frags.destructor = NULL;
>  	nf_frags.skb_free = nf_skb_free;
>  	nf_frags.qsize = sizeof(struct nf_ct_frag6_queue);
> diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
> index 2fa4355..9f9b6a2 100644
> --- a/net/ipv6/reassembly.c
> +++ b/net/ipv6/reassembly.c
> @@ -157,7 +157,7 @@ static inline void frag_kfree_skb(struct netns_frags *nf,
>  	kfree_skb(skb);
>  }
>  
> -void ip6_frag_init(struct inet_frag_queue *q, void *a)
> +static void ip6_frag_init(struct inet_frag_queue *q, void *a)
>  {
>  	struct frag_queue *fq = container_of(q, struct frag_queue, q);
>  	struct ip6_create_arg *arg = a;
> @@ -167,7 +167,6 @@ void ip6_frag_init(struct inet_frag_queue *q, void *a)
>  	ipv6_addr_copy(&fq->saddr, arg->src);
>  	ipv6_addr_copy(&fq->daddr, arg->dst);
>  }
> -EXPORT_SYMBOL(ip6_frag_init);
>  
>  /* Destruction primitives. */
>  
> -- 
> 1.6.3.3
> 
> --
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