Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

Pablo Neira Ayuso says:

====================
Netfilter updates for net-next

The following patchset contains Netfilter updates for net-next:

1) Use nfnetlink_unicast() instead of netlink_unicast() in nft_compat.

2) Remove call to nf_ct_l4proto_find() in flowtable offload timeout
   fixup.

3) CLUSTERIP registers ARP hook on demand, from Florian.

4) Use clusterip_net to store pernet warning, also from Florian.

5) Remove struct netns_xt, from Florian Westphal.

6) Enable ebtables hooks in initns on demand, from Florian.

7) Allow to filter conntrack netlink dump per status bits,
   from Florian Westphal.

8) Register x_tables hooks in initns on demand, from Florian.

9) Remove queue_handler from per-netns structure, again from Florian.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

7 files changed, 102 insertions, 82 deletions

diff --git a/net/ipv4/netfilter/arptable_filter.c b/net/ipv4/netfilter/arptable_filter.c
index 6922612df456..3de78416ec76 100644
--- a/net/ipv4/netfilter/arptable_filter.c
+++ b/net/ipv4/netfilter/arptable_filter.c
@@ -18,15 +18,12 @@ MODULE_DESCRIPTION("arptables filter table");
 #define FILTER_VALID_HOOKS ((1 << NF_ARP_IN) | (1 << NF_ARP_OUT) | \
 			   (1 << NF_ARP_FORWARD))
 
-static int __net_init arptable_filter_table_init(struct net *net);
-
 static const struct xt_table packet_filter = {
 	.name		= "filter",
 	.valid_hooks	= FILTER_VALID_HOOKS,
 	.me		= THIS_MODULE,
 	.af		= NFPROTO_ARP,
 	.priority	= NF_IP_PRI_FILTER,
-	.table_init	= arptable_filter_table_init,
 };
 
 /* The work comes in here from netfilter.c */
@@ -39,7 +36,7 @@ arptable_filter_hook(void *priv, struct sk_buff *skb,
 
 static struct nf_hook_ops *arpfilter_ops __read_mostly;
 
-static int __net_init arptable_filter_table_init(struct net *net)
+static int arptable_filter_table_init(struct net *net)
 {
 	struct arpt_replace *repl;
 	int err;
@@ -69,30 +66,32 @@ static struct pernet_operations arptable_filter_net_ops = {
 
 static int __init arptable_filter_init(void)
 {
-	int ret;
+	int ret = xt_register_template(&packet_filter,
+				       arptable_filter_table_init);
+
+	if (ret < 0)
+		return ret;
 
 	arpfilter_ops = xt_hook_ops_alloc(&packet_filter, arptable_filter_hook);
-	if (IS_ERR(arpfilter_ops))
+	if (IS_ERR(arpfilter_ops)) {
+		xt_unregister_template(&packet_filter);
 		return PTR_ERR(arpfilter_ops);
+	}
 
 	ret = register_pernet_subsys(&arptable_filter_net_ops);
 	if (ret < 0) {
+		xt_unregister_template(&packet_filter);
 		kfree(arpfilter_ops);
 		return ret;
 	}
 
-	ret = arptable_filter_table_init(&init_net);
-	if (ret) {
-		unregister_pernet_subsys(&arptable_filter_net_ops);
-		kfree(arpfilter_ops);
-	}
-
 	return ret;
 }
 
 static void __exit arptable_filter_fini(void)
 {
 	unregister_pernet_subsys(&arptable_filter_net_ops);
+	xt_unregister_template(&packet_filter);
 	kfree(arpfilter_ops);
 }
 
diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c
index 8f7ca67475b7..8fd1aba8af31 100644
--- a/net/ipv4/netfilter/ipt_CLUSTERIP.c
+++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c
@@ -66,11 +66,22 @@ struct clusterip_net {
 	/* lock protects the configs list */
 	spinlock_t lock;
 
+	bool clusterip_deprecated_warning;
 #ifdef CONFIG_PROC_FS
 	struct proc_dir_entry *procdir;
 	/* mutex protects the config->pde*/
 	struct mutex mutex;
 #endif
+	unsigned int hook_users;
+};
+
+static unsigned int clusterip_arp_mangle(void *priv, struct sk_buff *skb, const struct nf_hook_state *state);
+
+static const struct nf_hook_ops cip_arp_ops = {
+	.hook = clusterip_arp_mangle,
+	.pf = NFPROTO_ARP,
+	.hooknum = NF_ARP_OUT,
+	.priority = -1
 };
 
 static unsigned int clusterip_net_id __read_mostly;
@@ -458,6 +469,7 @@ clusterip_tg(struct sk_buff *skb, const struct xt_action_param *par)
 static int clusterip_tg_check(const struct xt_tgchk_param *par)
 {
 	struct ipt_clusterip_tgt_info *cipinfo = par->targinfo;
+	struct clusterip_net *cn = clusterip_pernet(par->net);
 	const struct ipt_entry *e = par->entryinfo;
 	struct clusterip_config *config;
 	int ret, i;
@@ -467,6 +479,9 @@ static int clusterip_tg_check(const struct xt_tgchk_param *par)
 		return -EOPNOTSUPP;
 	}
 
+	if (cn->hook_users == UINT_MAX)
+		return -EOVERFLOW;
+
 	if (cipinfo->hash_mode != CLUSTERIP_HASHMODE_SIP &&
 	    cipinfo->hash_mode != CLUSTERIP_HASHMODE_SIP_SPT &&
 	    cipinfo->hash_mode != CLUSTERIP_HASHMODE_SIP_SPT_DPT) {
@@ -517,10 +532,23 @@ static int clusterip_tg_check(const struct xt_tgchk_param *par)
 		return ret;
 	}
 
-	if (!par->net->xt.clusterip_deprecated_warning) {
+	if (cn->hook_users == 0) {
+		ret = nf_register_net_hook(par->net, &cip_arp_ops);
+
+		if (ret < 0) {
+			clusterip_config_entry_put(config);
+			clusterip_config_put(config);
+			nf_ct_netns_put(par->net, par->family);
+			return ret;
+		}
+	}
+
+	cn->hook_users++;
+
+	if (!cn->clusterip_deprecated_warning) {
 		pr_info("ipt_CLUSTERIP is deprecated and it will removed soon, "
 			"use xt_cluster instead\n");
-		par->net->xt.clusterip_deprecated_warning = true;
+		cn->clusterip_deprecated_warning = true;
 	}
 
 	cipinfo->config = config;
@@ -531,6 +559,7 @@ static int clusterip_tg_check(const struct xt_tgchk_param *par)
 static void clusterip_tg_destroy(const struct xt_tgdtor_param *par)
 {
 	const struct ipt_clusterip_tgt_info *cipinfo = par->targinfo;
+	struct clusterip_net *cn = clusterip_pernet(par->net);
 
 	/* if no more entries are referencing the config, remove it
 	 * from the list and destroy the proc entry */
@@ -539,6 +568,10 @@ static void clusterip_tg_destroy(const struct xt_tgdtor_param *par)
 	clusterip_config_put(cipinfo->config);
 
 	nf_ct_netns_put(par->net, par->family);
+	cn->hook_users--;
+
+	if (cn->hook_users == 0)
+		nf_unregister_net_hook(par->net, &cip_arp_ops);
 }
 
 #ifdef CONFIG_NETFILTER_XTABLES_COMPAT
@@ -602,9 +635,8 @@ static void arp_print(struct arp_payload *payload)
 #endif
 
 static unsigned int
-arp_mangle(void *priv,
-	   struct sk_buff *skb,
-	   const struct nf_hook_state *state)
+clusterip_arp_mangle(void *priv, struct sk_buff *skb,
+		     const struct nf_hook_state *state)
 {
 	struct arphdr *arp = arp_hdr(skb);
 	struct arp_payload *payload;
@@ -654,13 +686,6 @@ arp_mangle(void *priv,
 	return NF_ACCEPT;
 }
 
-static const struct nf_hook_ops cip_arp_ops = {
-	.hook = arp_mangle,
-	.pf = NFPROTO_ARP,
-	.hooknum = NF_ARP_OUT,
-	.priority = -1
-};
-
 /***********************************************************************
  * PROC DIR HANDLING
  ***********************************************************************/
@@ -817,20 +842,14 @@ static const struct proc_ops clusterip_proc_ops = {
 static int clusterip_net_init(struct net *net)
 {
 	struct clusterip_net *cn = clusterip_pernet(net);
-	int ret;
 
 	INIT_LIST_HEAD(&cn->configs);
 
 	spin_lock_init(&cn->lock);
 
-	ret = nf_register_net_hook(net, &cip_arp_ops);
-	if (ret < 0)
-		return ret;
-
 #ifdef CONFIG_PROC_FS
 	cn->procdir = proc_mkdir("ipt_CLUSTERIP", net->proc_net);
 	if (!cn->procdir) {
-		nf_unregister_net_hook(net, &cip_arp_ops);
 		pr_err("Unable to proc dir entry\n");
 		return -ENOMEM;
 	}
@@ -850,7 +869,6 @@ static void clusterip_net_exit(struct net *net)
 	cn->procdir = NULL;
 	mutex_unlock(&cn->mutex);
 #endif
-	nf_unregister_net_hook(net, &cip_arp_ops);
 }
 
 static struct pernet_operations clusterip_net_ops = {
diff --git a/net/ipv4/netfilter/iptable_filter.c b/net/ipv4/netfilter/iptable_filter.c
index 8272df7c6ad5..0eb0e2ab9bfc 100644
--- a/net/ipv4/netfilter/iptable_filter.c
+++ b/net/ipv4/netfilter/iptable_filter.c
@@ -19,7 +19,6 @@ MODULE_DESCRIPTION("iptables filter table");
 #define FILTER_VALID_HOOKS ((1 << NF_INET_LOCAL_IN) | \
 			    (1 << NF_INET_FORWARD) | \
 			    (1 << NF_INET_LOCAL_OUT))
-static int __net_init iptable_filter_table_init(struct net *net);
 
 static const struct xt_table packet_filter = {
 	.name		= "filter",
@@ -27,7 +26,6 @@ static const struct xt_table packet_filter = {
 	.me		= THIS_MODULE,
 	.af		= NFPROTO_IPV4,
 	.priority	= NF_IP_PRI_FILTER,
-	.table_init	= iptable_filter_table_init,
 };
 
 static unsigned int
@@ -43,7 +41,7 @@ static struct nf_hook_ops *filter_ops __read_mostly;
 static bool forward __read_mostly = true;
 module_param(forward, bool, 0000);
 
-static int __net_init iptable_filter_table_init(struct net *net)
+static int iptable_filter_table_init(struct net *net)
 {
 	struct ipt_replace *repl;
 	int err;
@@ -62,7 +60,7 @@ static int __net_init iptable_filter_table_init(struct net *net)
 
 static int __net_init iptable_filter_net_init(struct net *net)
 {
-	if (net == &init_net || !forward)
+	if (!forward)
 		return iptable_filter_table_init(net);
 
 	return 0;
@@ -86,22 +84,32 @@ static struct pernet_operations iptable_filter_net_ops = {
 
 static int __init iptable_filter_init(void)
 {
-	int ret;
+	int ret = xt_register_template(&packet_filter,
+				       iptable_filter_table_init);
+
+	if (ret < 0)
+		return ret;
 
 	filter_ops = xt_hook_ops_alloc(&packet_filter, iptable_filter_hook);
-	if (IS_ERR(filter_ops))
+	if (IS_ERR(filter_ops)) {
+		xt_unregister_template(&packet_filter);
 		return PTR_ERR(filter_ops);
+	}
 
 	ret = register_pernet_subsys(&iptable_filter_net_ops);
-	if (ret < 0)
+	if (ret < 0) {
+		xt_unregister_template(&packet_filter);
 		kfree(filter_ops);
+		return ret;
+	}
 
-	return ret;
+	return 0;
 }
 
 static void __exit iptable_filter_fini(void)
 {
 	unregister_pernet_subsys(&iptable_filter_net_ops);
+	xt_unregister_template(&packet_filter);
 	kfree(filter_ops);
 }
 
diff --git a/net/ipv4/netfilter/iptable_mangle.c b/net/ipv4/netfilter/iptable_mangle.c
index 2abc3836f391..b52a4c8a14fc 100644
--- a/net/ipv4/netfilter/iptable_mangle.c
+++ b/net/ipv4/netfilter/iptable_mangle.c
@@ -25,15 +25,12 @@ MODULE_DESCRIPTION("iptables mangle table");
 			    (1 << NF_INET_LOCAL_OUT) | \
 			    (1 << NF_INET_POST_ROUTING))
 
-static int __net_init iptable_mangle_table_init(struct net *net);
-
 static const struct xt_table packet_mangler = {
 	.name		= "mangle",
 	.valid_hooks	= MANGLE_VALID_HOOKS,
 	.me		= THIS_MODULE,
 	.af		= NFPROTO_IPV4,
 	.priority	= NF_IP_PRI_MANGLE,
-	.table_init	= iptable_mangle_table_init,
 };
 
 static unsigned int
@@ -83,7 +80,7 @@ iptable_mangle_hook(void *priv,
 }
 
 static struct nf_hook_ops *mangle_ops __read_mostly;
-static int __net_init iptable_mangle_table_init(struct net *net)
+static int iptable_mangle_table_init(struct net *net)
 {
 	struct ipt_replace *repl;
 	int ret;
@@ -113,32 +110,30 @@ static struct pernet_operations iptable_mangle_net_ops = {
 
 static int __init iptable_mangle_init(void)
 {
-	int ret;
+	int ret = xt_register_template(&packet_mangler,
+				       iptable_mangle_table_init);
 
 	mangle_ops = xt_hook_ops_alloc(&packet_mangler, iptable_mangle_hook);
 	if (IS_ERR(mangle_ops)) {
+		xt_unregister_template(&packet_mangler);
 		ret = PTR_ERR(mangle_ops);
 		return ret;
 	}
 
 	ret = register_pernet_subsys(&iptable_mangle_net_ops);
 	if (ret < 0) {
+		xt_unregister_template(&packet_mangler);
 		kfree(mangle_ops);
 		return ret;
 	}
 
-	ret = iptable_mangle_table_init(&init_net);
-	if (ret) {
-		unregister_pernet_subsys(&iptable_mangle_net_ops);
-		kfree(mangle_ops);
-	}
-
 	return ret;
 }
 
 static void __exit iptable_mangle_fini(void)
 {
 	unregister_pernet_subsys(&iptable_mangle_net_ops);
+	xt_unregister_template(&packet_mangler);
 	kfree(mangle_ops);
 }
 
diff --git a/net/ipv4/netfilter/iptable_nat.c b/net/ipv4/netfilter/iptable_nat.c
index a9913842ef18..45d7e072e6a5 100644
--- a/net/ipv4/netfilter/iptable_nat.c
+++ b/net/ipv4/netfilter/iptable_nat.c
@@ -17,8 +17,6 @@ struct iptable_nat_pernet {
 	struct nf_hook_ops *nf_nat_ops;
 };
 
-static int __net_init iptable_nat_table_init(struct net *net);
-
 static unsigned int iptable_nat_net_id __read_mostly;
 
 static const struct xt_table nf_nat_ipv4_table = {
@@ -29,7 +27,6 @@ static const struct xt_table nf_nat_ipv4_table = {
 			  (1 << NF_INET_LOCAL_IN),
 	.me		= THIS_MODULE,
 	.af		= NFPROTO_IPV4,
-	.table_init	= iptable_nat_table_init,
 };
 
 static unsigned int iptable_nat_do_chain(void *priv,
@@ -113,7 +110,7 @@ static void ipt_nat_unregister_lookups(struct net *net)
 	kfree(ops);
 }
 
-static int __net_init iptable_nat_table_init(struct net *net)
+static int iptable_nat_table_init(struct net *net)
 {
 	struct ipt_replace *repl;
 	int ret;
@@ -155,20 +152,25 @@ static struct pernet_operations iptable_nat_net_ops = {
 
 static int __init iptable_nat_init(void)
 {
-	int ret = register_pernet_subsys(&iptable_nat_net_ops);
+	int ret = xt_register_template(&nf_nat_ipv4_table,
+				       iptable_nat_table_init);
+
+	if (ret < 0)
+		return ret;
 
-	if (ret)
+	ret = register_pernet_subsys(&iptable_nat_net_ops);
+	if (ret < 0) {
+		xt_unregister_template(&nf_nat_ipv4_table);
 		return ret;
+	}
 
-	ret = iptable_nat_table_init(&init_net);
-	if (ret)
-		unregister_pernet_subsys(&iptable_nat_net_ops);
 	return ret;
 }
 
 static void __exit iptable_nat_exit(void)
 {
 	unregister_pernet_subsys(&iptable_nat_net_ops);
+	xt_unregister_template(&nf_nat_ipv4_table);
 }
 
 module_init(iptable_nat_init);
diff --git a/net/ipv4/netfilter/iptable_raw.c b/net/ipv4/netfilter/iptable_raw.c
index ceef397c1f5f..b88e0f36cd05 100644
--- a/net/ipv4/netfilter/iptable_raw.c
+++ b/net/ipv4/netfilter/iptable_raw.c
@@ -12,8 +12,6 @@
 
 #define RAW_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT))
 
-static int __net_init iptable_raw_table_init(struct net *net);
-
 static bool raw_before_defrag __read_mostly;
 MODULE_PARM_DESC(raw_before_defrag, "Enable raw table before defrag");
 module_param(raw_before_defrag, bool, 0000);
@@ -24,7 +22,6 @@ static const struct xt_table packet_raw = {
 	.me = THIS_MODULE,
 	.af = NFPROTO_IPV4,
 	.priority = NF_IP_PRI_RAW,
-	.table_init = iptable_raw_table_init,
 };
 
 static const struct xt_table packet_raw_before_defrag = {
@@ -33,7 +30,6 @@ static const struct xt_table packet_raw_before_defrag = {
 	.me = THIS_MODULE,
 	.af = NFPROTO_IPV4,
 	.priority = NF_IP_PRI_RAW_BEFORE_DEFRAG,
-	.table_init = iptable_raw_table_init,
 };
 
 /* The work comes in here from netfilter.c. */
@@ -89,22 +85,24 @@ static int __init iptable_raw_init(void)
 		pr_info("Enabling raw table before defrag\n");
 	}
 
+	ret = xt_register_template(table,
+				   iptable_raw_table_init);
+	if (ret < 0)
+		return ret;
+
 	rawtable_ops = xt_hook_ops_alloc(table, iptable_raw_hook);
-	if (IS_ERR(rawtable_ops))
+	if (IS_ERR(rawtable_ops)) {
+		xt_unregister_template(table);
 		return PTR_ERR(rawtable_ops);
+	}
 
 	ret = register_pernet_subsys(&iptable_raw_net_ops);
 	if (ret < 0) {
+		xt_unregister_template(table);
 		kfree(rawtable_ops);
 		return ret;
 	}
 
-	ret = iptable_raw_table_init(&init_net);
-	if (ret) {
-		unregister_pernet_subsys(&iptable_raw_net_ops);
-		kfree(rawtable_ops);
-	}
-
 	return ret;
 }
 
@@ -112,6 +110,7 @@ static void __exit iptable_raw_fini(void)
 {
 	unregister_pernet_subsys(&iptable_raw_net_ops);
 	kfree(rawtable_ops);
+	xt_unregister_template(&packet_raw);
 }
 
 module_init(iptable_raw_init);
diff --git a/net/ipv4/netfilter/iptable_security.c b/net/ipv4/netfilter/iptable_security.c
index 77973f5fd8f6..f519162a2fa5 100644
--- a/net/ipv4/netfilter/iptable_security.c
+++ b/net/ipv4/netfilter/iptable_security.c
@@ -25,15 +25,12 @@ MODULE_DESCRIPTION("iptables security table, for MAC rules");
 				(1 << NF_INET_FORWARD) | \
 				(1 << NF_INET_LOCAL_OUT)
 
-static int __net_init iptable_security_table_init(struct net *net);
-
 static const struct xt_table security_table = {
 	.name		= "security",
 	.valid_hooks	= SECURITY_VALID_HOOKS,
 	.me		= THIS_MODULE,
 	.af		= NFPROTO_IPV4,
 	.priority	= NF_IP_PRI_SECURITY,
-	.table_init	= iptable_security_table_init,
 };
 
 static unsigned int
@@ -45,7 +42,7 @@ iptable_security_hook(void *priv, struct sk_buff *skb,
 
 static struct nf_hook_ops *sectbl_ops __read_mostly;
 
-static int __net_init iptable_security_table_init(struct net *net)
+static int iptable_security_table_init(struct net *net)
 {
 	struct ipt_replace *repl;
 	int ret;
@@ -75,24 +72,25 @@ static struct pernet_operations iptable_security_net_ops = {
 
 static int __init iptable_security_init(void)
 {
-	int ret;
+	int ret = xt_register_template(&security_table,
+				       iptable_security_table_init);
+
+	if (ret < 0)
+		return ret;
 
 	sectbl_ops = xt_hook_ops_alloc(&security_table, iptable_security_hook);
-	if (IS_ERR(sectbl_ops))
+	if (IS_ERR(sectbl_ops)) {
+		xt_unregister_template(&security_table);
 		return PTR_ERR(sectbl_ops);
+	}
 
 	ret = register_pernet_subsys(&iptable_security_net_ops);
 	if (ret < 0) {
+		xt_unregister_template(&security_table);
 		kfree(sectbl_ops);
 		return ret;
 	}
 
-	ret = iptable_security_table_init(&init_net);
-	if (ret) {
-		unregister_pernet_subsys(&iptable_security_net_ops);
-		kfree(sectbl_ops);
-	}
-
 	return ret;
 }
 
@@ -100,6 +98,7 @@ static void __exit iptable_security_fini(void)
 {
 	unregister_pernet_subsys(&iptable_security_net_ops);
 	kfree(sectbl_ops);
+	xt_unregister_template(&security_table);
 }
 
 module_init(iptable_security_init);