netdev - [PATCH 07/10] netfilter: nf_conntrack_l4proto

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Message-Id: <1339668445-23848-7-git-send-email-gaofeng@cn.fujitsu.com>
Date:	Thu, 14 Jun 2012 18:07:22 +0800
From:	Gao feng <gaofeng@...fujitsu.com>
To:	pablo@...filter.org
Cc:	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
	Gao feng <gaofeng@...fujitsu.com>
Subject: [PATCH 07/10] netfilter: nf_conntrack_l4proto_udplite[4,6] cleanup

some cleanup for nf_conntrack_l4proto_udplite[4,6],
make codes more clearer and ready for moving the
sysctl code to nf_conntrack_proto_*_sysctl.c to
reduce the ifdef pollution.

and use nf_proto_net.users to identify if it's the first time
we use the nf_proto_net. when it's the first time,we will
initialized it.

Signed-off-by: Gao feng <gaofeng@...fujitsu.com>
---
 net/netfilter/nf_conntrack_proto_udplite.c |   42 +++++++++++++++++----------
 1 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/net/netfilter/nf_conntrack_proto_udplite.c b/net/netfilter/nf_conntrack_proto_udplite.c
index d33e511..f6a789a 100644
--- a/net/netfilter/nf_conntrack_proto_udplite.c
+++ b/net/netfilter/nf_conntrack_proto_udplite.c
@@ -234,29 +234,39 @@ static struct ctl_table udplite_sysctl_table[] = {
 };
 #endif /* CONFIG_SYSCTL */
 
+static int udplite_kmemdup_sysctl_table(struct nf_proto_net *pn)
+{
+#ifdef CONFIG_SYSCTL
+	struct udplite_net *un = (struct udplite_net *)pn;
+
+	if (pn->ctl_table)
+		return 0;
+
+	pn->ctl_table = kmemdup(udplite_sysctl_table,
+				sizeof(udplite_sysctl_table),
+				GFP_KERNEL);
+	if (!pn->ctl_table)
+		return -ENOMEM;
+
+	pn->ctl_table[0].data = &un->timeouts[UDPLITE_CT_UNREPLIED];
+	pn->ctl_table[1].data = &un->timeouts[UDPLITE_CT_REPLIED];
+#endif
+	return 0;
+}
+
+
 static int udplite_init_net(struct net *net, u_int16_t proto)
 {
-	int i;
 	struct udplite_net *un = udplite_pernet(net);
 	struct nf_proto_net *pn = (struct nf_proto_net *)un;
-#ifdef CONFIG_SYSCTL
-	if (!pn->ctl_table) {
-#else
-	if (!pn->users++) {
-#endif
+
+	if (!pn->users) {
+		int i;
 		for (i = 0 ; i < UDPLITE_CT_MAX; i++)
 			un->timeouts[i] = udplite_timeouts[i];
-#ifdef CONFIG_SYSCTL
-		pn->ctl_table = kmemdup(udplite_sysctl_table,
-					sizeof(udplite_sysctl_table),
-					GFP_KERNEL);
-		if (!pn->ctl_table)
-			return -ENOMEM;
-		pn->ctl_table[0].data = &un->timeouts[UDPLITE_CT_UNREPLIED];
-		pn->ctl_table[1].data = &un->timeouts[UDPLITE_CT_REPLIED];
-#endif
 	}
-	return 0;
+
+	return udplite_kmemdup_sysctl_table(pn);
 }
 
 static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
-- 
1.7.7.6

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