[PATCH 06/10] merge udpv[4,6]_net_init into udp_net_init

[Gao feng <gaofeng@cn.fujitsu.com>]

merge udpv4_net_init and udpv6_net_init into udp_net_init to
reduce the redundancy codes.

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@cn.fujitsu.com>
---
 net/netfilter/nf_conntrack_proto_udp.c |   60 ++++++++++++--------------------
 1 files changed, 22 insertions(+), 38 deletions(-)

diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
index 2b978e6..480126e 100644
--- a/net/netfilter/nf_conntrack_proto_udp.c
+++ b/net/netfilter/nf_conntrack_proto_udp.c
@@ -239,13 +239,16 @@ static int udp_kmemdup_sysctl_table(struct nf_proto_net *pn)
 {
 #ifdef CONFIG_SYSCTL
 	struct nf_udp_net *un = (struct nf_udp_net *)pn;
+
 	if (pn->ctl_table)
 		return 0;
+
 	pn->ctl_table = kmemdup(udp_sysctl_table,
 				sizeof(udp_sysctl_table),
 				GFP_KERNEL);
 	if (!pn->ctl_table)
 		return -ENOMEM;
+
 	pn->ctl_table[0].data = &un->timeouts[UDP_CT_UNREPLIED];
 	pn->ctl_table[1].data = &un->timeouts[UDP_CT_REPLIED];
 #endif
@@ -257,6 +260,7 @@ static int udp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn)
 #ifdef CONFIG_SYSCTL
 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
 	struct nf_udp_net *un = (struct nf_udp_net *)pn;
+
 	pn->ctl_compat_table = kmemdup(udp_compat_sysctl_table,
 				       sizeof(udp_compat_sysctl_table),
 				       GFP_KERNEL);
@@ -270,52 +274,32 @@ static int udp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn)
 	return 0;
 }
 
-static void udp_init_net_data(struct nf_udp_net *un)
+static int udp_init_net(struct net *net, u_int16_t proto)
 {
-	int i;
-#ifdef CONFIG_SYSCTL
-	if (!un->pn.ctl_table) {
-#else
-	if (!un->pn.users++) {
-#endif
+	int ret = 0;
+	struct nf_udp_net *un = udp_pernet(net);
+	struct nf_proto_net *pn = (struct nf_proto_net *)un;
+
+	if (pn->users) {
+		int i = 0;
 		for (i = 0; i < UDP_CT_MAX; i++)
 			un->timeouts[i] = udp_timeouts[i];
 	}
-}
 
-static int udpv4_init_net(struct net *net, u_int16_t proto)
-{
-	int ret;
-	struct nf_udp_net *un = udp_pernet(net);
-	struct nf_proto_net *pn = (struct nf_proto_net *)un;
+	if (proto == AF_INET) {
+		ret = udp_kmemdup_compat_sysctl_table(pn);
+		if (ret < 0)
+			return ret;
 
-	udp_init_net_data(un);
+		ret = udp_kmemdup_sysctl_table(pn);
+		if (ret < 0)
+			nf_ct_kfree_compat_sysctl_table(pn);
+	} else
+		ret = udp_kmemdup_sysctl_table(pn);
 
-	ret = udp_kmemdup_compat_sysctl_table(pn);
-	if (ret < 0)
-		return ret;
-
-	ret = udp_kmemdup_sysctl_table(pn);
-#ifdef CONFIG_SYSCTL
-#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
-	if (ret < 0) {
-		kfree(pn->ctl_compat_table);
-		pn->ctl_compat_table = NULL;
-	}
-#endif
-#endif
 	return ret;
 }
 
-static int udpv6_init_net(struct net *net, u_int16_t proto)
-{
-	struct nf_udp_net *un = udp_pernet(net);
-	struct nf_proto_net *pn = (struct nf_proto_net *)un;
-
-	udp_init_net_data(un);
-	return udp_kmemdup_sysctl_table(pn);
-}
-
 struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly =
 {
 	.l3proto		= PF_INET,
@@ -343,7 +327,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly =
 		.nla_policy	= udp_timeout_nla_policy,
 	},
 #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
-	.init_net		= udpv4_init_net,
+	.init_net		= udp_init_net,
 };
 EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp4);
 
@@ -374,6 +358,6 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 __read_mostly =
 		.nla_policy	= udp_timeout_nla_policy,
 	},
 #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
-	.init_net		= udpv6_init_net,
+	.init_net		= udp_init_net,
 };
 EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp6);
-- 
1.7.7.6