netdev - [RFC PATCH net-next 5/7 v2]IPv6:netfilter: Record MIB counter when reassembling all fragments

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Date:	Sat, 27 Feb 2010 14:40:04 +0800
From:	Shan Wei <shanwei@...fujitsu.com>
To:	Patrick McHardy <kaber@...sh.net>,
	David Miller <davem@...emloft.net>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Yasuyuki KOZAKAI <yasuyuki.kozakai@...hiba.co.jp>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	netfilter-devel@...r.kernel.org
Subject: [RFC PATCH net-next 5/7 v2]IPv6:netfilter: Record MIB counter when
 reassembling all fragments

According to RFC4293, this patch records MIB counter of IPSTATS_MIB_REASMFAILS, 
IPSTATS_MIB_REASMOKS, when reassembling fragments after all fragments reached.


Signed-off-by: Shan Wei <shanwei@...fujitsu.com>
---
 net/ipv6/netfilter/nf_conntrack_reasm.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 27d8ac1..4640795 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -485,6 +485,7 @@ static struct sk_buff *
 nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
 {
 	struct sk_buff *fp, *op, *head = fq->q.fragments;
+	struct net *net = container_of(fq->q.net, struct net, ipv6.frags);
 	int    payload_len;
 
 	fq_kill(fq);
@@ -586,6 +587,9 @@ nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
 		NFCT_FRAG6_CB(fp)->orig = NULL;
 	}
 
+	rcu_read_lock();
+	IP6_INC_STATS(net, __in6_dev_get(dev), IPSTATS_MIB_REASMOKS);
+	rcu_read_unlock();
 	return head;
 
 out_oversize:
@@ -596,6 +600,9 @@ out_oom:
 	if (net_ratelimit())
 		printk(KERN_DEBUG "nf_ct_frag6_reasm: no memory for reassembly\n");
 out_fail:
+	rcu_read_lock();
+	IP6_INC_STATS(net, __in6_dev_get(dev), IPSTATS_MIB_REASMFAILS);
+	rcu_read_unlock();
 	return NULL;
 }
 
-- 
1.6.3.3
--
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