Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6

net/netfilter/Kconfig

@@ -357,6 +357,45 @@ config NETFILTER_XT_TARGET_DSCP
 
 	  To compile it as a module, choose M here.  If unsure, say N.
 
+config NETFILTER_XT_TARGET_HL
+	tristate '"HL" hoplimit target support'
+	depends on IP_NF_MANGLE || IP6_NF_MANGLE
+	depends on NETFILTER_ADVANCED
+	---help---
+	This option adds the "HL" (for IPv6) and "TTL" (for IPv4)
+	targets, which enable the user to change the
+	hoplimit/time-to-live value of the IP header.
+
+	While it is safe to decrement the hoplimit/TTL value, the
+	modules also allow to increment and set the hoplimit value of
+	the header to arbitrary values. This is EXTREMELY DANGEROUS
+	since you can easily create immortal packets that loop
+	forever on the network.
+
+config NETFILTER_XT_TARGET_LED
+	tristate '"LED" target support'
+	depends on LEDS_CLASS
+	depends on NETFILTER_ADVANCED
+	help
+	  This option adds a `LED' target, which allows you to blink LEDs in
+	  response to particular packets passing through your machine.
+
+	  This can be used to turn a spare LED into a network activity LED,
+	  which only flashes in response to FTP transfers, for example.  Or
+	  you could have an LED which lights up for a minute or two every time
+	  somebody connects to your machine via SSH.
+
+	  You will need support for the "led" class to make this work.
+
+	  To create an LED trigger for incoming SSH traffic:
+	    iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh --led-delay 1000
+
+	  Then attach the new trigger to an LED on your system:
+	    echo netfilter-ssh > /sys/class/leds/<ledname>/trigger
+
+	  For more information on the LEDs available on your system, see
+	  Documentation/leds-class.txt
+
 config NETFILTER_XT_TARGET_MARK
 	tristate '"MARK" target support'
 	default m if NETFILTER_ADVANCED=n
@@ -488,6 +527,22 @@ config NETFILTER_XT_TARGET_TCPOPTSTRIP
 	  This option adds a "TCPOPTSTRIP" target, which allows you to strip
 	  TCP options from TCP packets.
 
+config NETFILTER_XT_MATCH_CLUSTER
+	tristate '"cluster" match support'
+	depends on NF_CONNTRACK
+	depends on NETFILTER_ADVANCED
+	---help---
+	  This option allows you to build work-load-sharing clusters of
+	  network servers/stateful firewalls without having a dedicated
+	  load-balancing router/server/switch. Basically, this match returns
+	  true when the packet must be handled by this cluster node. Thus,
+	  all nodes see all packets and this match decides which node handles
+	  what packets. The work-load sharing algorithm is based on source
+	  address hashing.
+
+	  If you say Y or M here, try `iptables -m cluster --help` for
+	  more information.
+
 config NETFILTER_XT_MATCH_COMMENT
 	tristate  '"comment" match support'
 	depends on NETFILTER_ADVANCED
@@ -605,6 +660,14 @@ config NETFILTER_XT_MATCH_HELPER
 
 	  To compile it as a module, choose M here.  If unsure, say Y.
 
+config NETFILTER_XT_MATCH_HL
+	tristate '"hl" hoplimit/TTL match support'
+	depends on NETFILTER_ADVANCED
+	---help---
+	HL matching allows you to match packets based on the hoplimit
+	in the IPv6 header, or the time-to-live field in the IPv4
+	header of the packet.
+
 config NETFILTER_XT_MATCH_IPRANGE
 	tristate '"iprange" address range match support'
 	depends on NETFILTER_ADVANCED

net/netfilter/Makefile

@@ -45,6 +45,8 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CLASSIFY) += xt_CLASSIFY.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_CONNMARK) += xt_CONNMARK.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_HL) += xt_HL.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_MARK) += xt_MARK.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o
@@ -57,6 +59,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP) += xt_TCPOPTSTRIP.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_TRACE) += xt_TRACE.o
 
 # matches
+obj-$(CONFIG_NETFILTER_XT_MATCH_CLUSTER) += xt_cluster.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_COMMENT) += xt_comment.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_CONNBYTES) += xt_connbytes.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_CONNLIMIT) += xt_connlimit.o
@@ -67,6 +70,7 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_DSCP) += xt_dscp.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_ESP) += xt_esp.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_HASHLIMIT) += xt_hashlimit.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_HELPER) += xt_helper.o
+obj-$(CONFIG_NETFILTER_XT_MATCH_HL) += xt_hl.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_IPRANGE) += xt_iprange.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_LENGTH) += xt_length.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_LIMIT) += xt_limit.o

net/netfilter/core.c

@@ -174,7 +174,6 @@ next_hook:
 			     outdev, &elem, okfn, hook_thresh);
 	if (verdict == NF_ACCEPT || verdict == NF_STOP) {
 		ret = 1;
-		goto unlock;
 	} else if (verdict == NF_DROP) {
 		kfree_skb(skb);
 		ret = -EPERM;
@@ -183,7 +182,6 @@ next_hook:
 			      verdict >> NF_VERDICT_BITS))
 			goto next_hook;
 	}
-unlock:
 	rcu_read_unlock();
 	return ret;
 }

net/netfilter/nf_conntrack_core.c

@@ -54,7 +54,7 @@ EXPORT_SYMBOL_GPL(nf_conntrack_lock);
 unsigned int nf_conntrack_htable_size __read_mostly;
 EXPORT_SYMBOL_GPL(nf_conntrack_htable_size);
 
-int nf_conntrack_max __read_mostly;
+unsigned int nf_conntrack_max __read_mostly;
 EXPORT_SYMBOL_GPL(nf_conntrack_max);
 
 struct nf_conn nf_conntrack_untracked __read_mostly;
@@ -472,7 +472,8 @@ struct nf_conn *nf_conntrack_alloc(struct net *net,
 	struct nf_conn *ct;
 
 	if (unlikely(!nf_conntrack_hash_rnd_initted)) {
-		get_random_bytes(&nf_conntrack_hash_rnd, 4);
+		get_random_bytes(&nf_conntrack_hash_rnd,
+				sizeof(nf_conntrack_hash_rnd));
 		nf_conntrack_hash_rnd_initted = 1;
 	}
 
@@ -516,16 +517,17 @@ EXPORT_SYMBOL_GPL(nf_conntrack_alloc);
 static void nf_conntrack_free_rcu(struct rcu_head *head)
 {
 	struct nf_conn *ct = container_of(head, struct nf_conn, rcu);
-	struct net *net = nf_ct_net(ct);
 
 	nf_ct_ext_free(ct);
 	kmem_cache_free(nf_conntrack_cachep, ct);
-	atomic_dec(&net->ct.count);
 }
 
 void nf_conntrack_free(struct nf_conn *ct)
 {
+	struct net *net = nf_ct_net(ct);
+
 	nf_ct_ext_destroy(ct);
+	atomic_dec(&net->ct.count);
 	call_rcu(&ct->rcu, nf_conntrack_free_rcu);
 }
 EXPORT_SYMBOL_GPL(nf_conntrack_free);
@@ -733,6 +735,8 @@ nf_conntrack_in(struct net *net, u_int8_t pf, unsigned int hooknum,
 		nf_conntrack_put(skb->nfct);
 		skb->nfct = NULL;
 		NF_CT_STAT_INC_ATOMIC(net, invalid);
+		if (ret == -NF_DROP)
+			NF_CT_STAT_INC_ATOMIC(net, drop);
 		return -ret;
 	}
 
@@ -1103,7 +1107,7 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
 
 	/* We have to rehahs for the new table anyway, so we also can
 	 * use a newrandom seed */
-	get_random_bytes(&rnd, 4);
+	get_random_bytes(&rnd, sizeof(rnd));
 
 	/* Lookups in the old hash might happen in parallel, which means we
 	 * might get false negatives during connection lookup. New connections

net/netfilter/nf_conntrack_expect.c

@@ -72,7 +72,8 @@ static unsigned int nf_ct_expect_dst_hash(const struct nf_conntrack_tuple *tuple
 	unsigned int hash;
 
 	if (unlikely(!nf_ct_expect_hash_rnd_initted)) {
-		get_random_bytes(&nf_ct_expect_hash_rnd, 4);
+		get_random_bytes(&nf_ct_expect_hash_rnd,
+				 sizeof(nf_ct_expect_hash_rnd));
 		nf_ct_expect_hash_rnd_initted = 1;
 	}
 

net/netfilter/nf_conntrack_netlink.c

@@ -518,6 +518,7 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
 nla_put_failure:
 	rcu_read_unlock();
 nlmsg_failure:
+	nfnetlink_set_err(0, group, -ENOBUFS);
 	kfree_skb(skb);
 	return NOTIFY_DONE;
 }
@@ -599,7 +600,8 @@ ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
 
 	nla_parse_nested(tb, CTA_IP_MAX, attr, NULL);
 
-	l3proto = nf_ct_l3proto_find_get(tuple->src.l3num);
+	rcu_read_lock();
+	l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
 
 	if (likely(l3proto->nlattr_to_tuple)) {
 		ret = nla_validate_nested(attr, CTA_IP_MAX,
@@ -608,7 +610,7 @@ ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple)
 			ret = l3proto->nlattr_to_tuple(tb, tuple);
 	}
 
-	nf_ct_l3proto_put(l3proto);
+	rcu_read_unlock();
 
 	return ret;
 }
@@ -633,7 +635,8 @@ ctnetlink_parse_tuple_proto(struct nlattr *attr,
 		return -EINVAL;
 	tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]);
 
-	l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum);
+	rcu_read_lock();
+	l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
 
 	if (likely(l4proto->nlattr_to_tuple)) {
 		ret = nla_validate_nested(attr, CTA_PROTO_MAX,
@@ -642,7 +645,7 @@ ctnetlink_parse_tuple_proto(struct nlattr *attr,
 			ret = l4proto->nlattr_to_tuple(tb, tuple);
 	}
 
-	nf_ct_l4proto_put(l4proto);
+	rcu_read_unlock();
 
 	return ret;
 }
@@ -989,10 +992,11 @@ ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[])
 
 	nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL);
 
-	l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct));
+	rcu_read_lock();
+	l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
 	if (l4proto->from_nlattr)
 		err = l4proto->from_nlattr(tb, ct);
-	nf_ct_l4proto_put(l4proto);
+	rcu_read_unlock();
 
 	return err;
 }
@@ -1062,6 +1066,10 @@ ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[])
 {
 	int err;
 
+	/* only allow NAT changes and master assignation for new conntracks */
+	if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER])
+		return -EOPNOTSUPP;
+
 	if (cda[CTA_HELP]) {
 		err = ctnetlink_change_helper(ct, cda);
 		if (err < 0)
@@ -1124,13 +1132,11 @@ ctnetlink_event_report(struct nf_conn *ct, u32 pid, int report)
 				  report);
 }
 
-static int
+static struct nf_conn *
 ctnetlink_create_conntrack(struct nlattr *cda[],
 			   struct nf_conntrack_tuple *otuple,
 			   struct nf_conntrack_tuple *rtuple,
-			   struct nf_conn *master_ct,
-			   u32 pid,
-			   int report)
+			   u8 u3)
 {
 	struct nf_conn *ct;
 	int err = -EINVAL;
@@ -1138,10 +1144,10 @@ ctnetlink_create_conntrack(struct nlattr *cda[],
 
 	ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC);
 	if (IS_ERR(ct))
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	if (!cda[CTA_TIMEOUT])
-		goto err;
+		goto err1;
 	ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT]));
 
 	ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
@@ -1152,10 +1158,8 @@ ctnetlink_create_conntrack(struct nlattr *cda[],
  		char *helpname;
  
  		err = ctnetlink_parse_help(cda[CTA_HELP], &helpname);
- 		if (err < 0) {
-			rcu_read_unlock();
-			goto err;
-		}
+ 		if (err < 0)
+			goto err2;
 
 		helper = __nf_conntrack_helper_find_byname(helpname);
 		if (helper == NULL) {
@@ -1163,28 +1167,26 @@ ctnetlink_create_conntrack(struct nlattr *cda[],
 #ifdef CONFIG_MODULES
 			if (request_module("nfct-helper-%s", helpname) < 0) {
 				err = -EOPNOTSUPP;
-				goto err;
+				goto err1;
 			}
 
 			rcu_read_lock();
 			helper = __nf_conntrack_helper_find_byname(helpname);
 			if (helper) {
-				rcu_read_unlock();
 				err = -EAGAIN;
-				goto err;
+				goto err2;
 			}
 			rcu_read_unlock();
 #endif
 			err = -EOPNOTSUPP;
-			goto err;
+			goto err1;
 		} else {
 			struct nf_conn_help *help;
 
 			help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
 			if (help == NULL) {
-				rcu_read_unlock();
 				err = -ENOMEM;
-				goto err;
+				goto err2;
 			}
 
 			/* not in hash table yet so not strictly necessary */
@@ -1193,44 +1195,34 @@ ctnetlink_create_conntrack(struct nlattr *cda[],
 	} else {
 		/* try an implicit helper assignation */
 		err = __nf_ct_try_assign_helper(ct, GFP_ATOMIC);
-		if (err < 0) {
-			rcu_read_unlock();
-			goto err;
-		}
+		if (err < 0)
+			goto err2;
 	}
 
 	if (cda[CTA_STATUS]) {
 		err = ctnetlink_change_status(ct, cda);
-		if (err < 0) {
-			rcu_read_unlock();
-			goto err;
-		}
+		if (err < 0)
+			goto err2;
 	}
 
 	if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
 		err = ctnetlink_change_nat(ct, cda);
-		if (err < 0) {
-			rcu_read_unlock();
-			goto err;
-		}
+		if (err < 0)
+			goto err2;
 	}
 
 #ifdef CONFIG_NF_NAT_NEEDED
 	if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) {
 		err = ctnetlink_change_nat_seq_adj(ct, cda);
-		if (err < 0) {
-			rcu_read_unlock();
-			goto err;
-		}
+		if (err < 0)
+			goto err2;
 	}
 #endif
 
 	if (cda[CTA_PROTOINFO]) {
 		err = ctnetlink_change_protoinfo(ct, cda);
-		if (err < 0) {
-			rcu_read_unlock();
-			goto err;
-		}
+		if (err < 0)
+			goto err2;
 	}
 
 	nf_ct_acct_ext_add(ct, GFP_ATOMIC);
@@ -1241,23 +1233,37 @@ ctnetlink_create_conntrack(struct nlattr *cda[],
 #endif
 
 	/* setup master conntrack: this is a confirmed expectation */
-	if (master_ct) {
+	if (cda[CTA_TUPLE_MASTER]) {
+		struct nf_conntrack_tuple master;
+		struct nf_conntrack_tuple_hash *master_h;
+		struct nf_conn *master_ct;
+
+		err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3);
+		if (err < 0)
+			goto err2;
+
+		master_h = __nf_conntrack_find(&init_net, &master);
+		if (master_h == NULL) {
+			err = -ENOENT;
+			goto err2;
+		}
+		master_ct = nf_ct_tuplehash_to_ctrack(master_h);
+		nf_conntrack_get(&master_ct->ct_general);
 		__set_bit(IPS_EXPECTED_BIT, &ct->status);
 		ct->master = master_ct;
 	}
 
-	nf_conntrack_get(&ct->ct_general);
 	add_timer(&ct->timeout);
 	nf_conntrack_hash_insert(ct);
 	rcu_read_unlock();
-	ctnetlink_event_report(ct, pid, report);
-	nf_ct_put(ct);
 
-	return 0;
+	return ct;
 
-err:
+err2:
+	rcu_read_unlock();
+err1:
 	nf_conntrack_free(ct);
-	return err;
+	return ERR_PTR(err);
 }
 
 static int
@@ -1289,38 +1295,25 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
 		h = __nf_conntrack_find(&init_net, &rtuple);
 
 	if (h == NULL) {
-		struct nf_conntrack_tuple master;
-		struct nf_conntrack_tuple_hash *master_h = NULL;
-		struct nf_conn *master_ct = NULL;
+		err = -ENOENT;
+		if (nlh->nlmsg_flags & NLM_F_CREATE) {
+			struct nf_conn *ct;
 
-		if (cda[CTA_TUPLE_MASTER]) {
-			err = ctnetlink_parse_tuple(cda,
-						    &master,
-						    CTA_TUPLE_MASTER,
-						    u3);
-			if (err < 0)
-				goto out_unlock;
-
-			master_h = __nf_conntrack_find(&init_net, &master);
-			if (master_h == NULL) {
-				err = -ENOENT;
+			ct = ctnetlink_create_conntrack(cda, &otuple,
+							&rtuple, u3);
+			if (IS_ERR(ct)) {
+				err = PTR_ERR(ct);
 				goto out_unlock;
 			}
-			master_ct = nf_ct_tuplehash_to_ctrack(master_h);
-			nf_conntrack_get(&master_ct->ct_general);
-		}
-
-		err = -ENOENT;
-		if (nlh->nlmsg_flags & NLM_F_CREATE)
-			err = ctnetlink_create_conntrack(cda,
-							 &otuple,
-							 &rtuple,
-							 master_ct,
-							 NETLINK_CB(skb).pid,
-							 nlmsg_report(nlh));
-		spin_unlock_bh(&nf_conntrack_lock);
-		if (err < 0 && master_ct)
-			nf_ct_put(master_ct);
+			err = 0;
+			nf_conntrack_get(&ct->ct_general);
+			spin_unlock_bh(&nf_conntrack_lock);
+			ctnetlink_event_report(ct,
+					       NETLINK_CB(skb).pid,
+					       nlmsg_report(nlh));
+			nf_ct_put(ct);
+		} else
+			spin_unlock_bh(&nf_conntrack_lock);
 
 		return err;
 	}
@@ -1332,17 +1325,6 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
 	if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
 		struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
 
-		/* we only allow nat config for new conntracks */
-		if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
-			err = -EOPNOTSUPP;
-			goto out_unlock;
-		}
-		/* can't link an existing conntrack to a master */
-		if (cda[CTA_TUPLE_MASTER]) {
-			err = -EOPNOTSUPP;
-			goto out_unlock;
-		}
-
 		err = ctnetlink_change_conntrack(ct, cda);
 		if (err == 0) {
 			nf_conntrack_get(&ct->ct_general);
@@ -1533,6 +1515,7 @@ static int ctnetlink_expect_event(struct notifier_block *this,
 nla_put_failure:
 	rcu_read_unlock();
 nlmsg_failure:
+	nfnetlink_set_err(0, 0, -ENOBUFS);
 	kfree_skb(skb);
 	return NOTIFY_DONE;
 }

net/netfilter/nf_conntrack_proto.c

@@ -74,27 +74,6 @@ EXPORT_SYMBOL_GPL(__nf_ct_l4proto_find);
 
 /* this is guaranteed to always return a valid protocol helper, since
  * it falls back to generic_protocol */
-struct nf_conntrack_l4proto *
-nf_ct_l4proto_find_get(u_int16_t l3proto, u_int8_t l4proto)
-{
-	struct nf_conntrack_l4proto *p;
-
-	rcu_read_lock();
-	p = __nf_ct_l4proto_find(l3proto, l4proto);
-	if (!try_module_get(p->me))
-		p = &nf_conntrack_l4proto_generic;
-	rcu_read_unlock();
-
-	return p;
-}
-EXPORT_SYMBOL_GPL(nf_ct_l4proto_find_get);
-
-void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p)
-{
-	module_put(p->me);
-}
-EXPORT_SYMBOL_GPL(nf_ct_l4proto_put);
-
 struct nf_conntrack_l3proto *
 nf_ct_l3proto_find_get(u_int16_t l3proto)
 {

net/netfilter/nf_conntrack_proto_dccp.c

@@ -16,6 +16,9 @@
 #include <linux/skbuff.h>
 #include <linux/dccp.h>
 
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+
 #include <linux/netfilter/nfnetlink_conntrack.h>
 #include <net/netfilter/nf_conntrack.h>
 #include <net/netfilter/nf_conntrack_l4proto.h>
@@ -23,8 +26,6 @@
 
 static DEFINE_RWLOCK(dccp_lock);
 
-static int nf_ct_dccp_loose __read_mostly = 1;
-
 /* Timeouts are based on values from RFC4340:
  *
  * - REQUEST:
@@ -72,16 +73,6 @@ static int nf_ct_dccp_loose __read_mostly = 1;
 
 #define DCCP_MSL (2 * 60 * HZ)
 
-static unsigned int dccp_timeout[CT_DCCP_MAX + 1] __read_mostly = {
-	[CT_DCCP_REQUEST]	= 2 * DCCP_MSL,
-	[CT_DCCP_RESPOND]	= 4 * DCCP_MSL,
-	[CT_DCCP_PARTOPEN]	= 4 * DCCP_MSL,
-	[CT_DCCP_OPEN]		= 12 * 3600 * HZ,
-	[CT_DCCP_CLOSEREQ]	= 64 * HZ,
-	[CT_DCCP_CLOSING]	= 64 * HZ,
-	[CT_DCCP_TIMEWAIT]	= 2 * DCCP_MSL,
-};
-
 static const char * const dccp_state_names[] = {
 	[CT_DCCP_NONE]		= "NONE",
 	[CT_DCCP_REQUEST]	= "REQUEST",
@@ -393,6 +384,22 @@ dccp_state_table[CT_DCCP_ROLE_MAX + 1][DCCP_PKT_SYNCACK + 1][CT_DCCP_MAX + 1] =
 	},
 };
 
+/* this module per-net specifics */
+static int dccp_net_id;
+struct dccp_net {
+	int dccp_loose;
+	unsigned int dccp_timeout[CT_DCCP_MAX + 1];
+#ifdef CONFIG_SYSCTL
+	struct ctl_table_header *sysctl_header;
+	struct ctl_table *sysctl_table;
+#endif
+};
+
+static inline struct dccp_net *dccp_pernet(struct net *net)
+{
+	return net_generic(net, dccp_net_id);
+}
+
 static bool dccp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
 			      struct nf_conntrack_tuple *tuple)
 {
@@ -419,6 +426,7 @@ static bool dccp_new(struct nf_conn *ct, const struct sk_buff *skb,
 		     unsigned int dataoff)
 {
 	struct net *net = nf_ct_net(ct);
+	struct dccp_net *dn;
 	struct dccp_hdr _dh, *dh;
 	const char *msg;
 	u_int8_t state;
@@ -429,7 +437,8 @@ static bool dccp_new(struct nf_conn *ct, const struct sk_buff *skb,
 	state = dccp_state_table[CT_DCCP_ROLE_CLIENT][dh->dccph_type][CT_DCCP_NONE];
 	switch (state) {
 	default:
-		if (nf_ct_dccp_loose == 0) {
+		dn = dccp_pernet(net);
+		if (dn->dccp_loose == 0) {
 			msg = "nf_ct_dccp: not picking up existing connection ";
 			goto out_invalid;
 		}
@@ -465,6 +474,7 @@ static int dccp_packet(struct nf_conn *ct, const struct sk_buff *skb,
 		       u_int8_t pf, unsigned int hooknum)
 {
 	struct net *net = nf_ct_net(ct);
+	struct dccp_net *dn;
 	enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
 	struct dccp_hdr _dh, *dh;
 	u_int8_t type, old_state, new_state;
@@ -542,7 +552,9 @@ static int dccp_packet(struct nf_conn *ct, const struct sk_buff *skb,
 	ct->proto.dccp.last_pkt = type;
 	ct->proto.dccp.state = new_state;
 	write_unlock_bh(&dccp_lock);
-	nf_ct_refresh_acct(ct, ctinfo, skb, dccp_timeout[new_state]);
+
+	dn = dccp_pernet(net);
+	nf_ct_refresh_acct(ct, ctinfo, skb, dn->dccp_timeout[new_state]);
 
 	return NF_ACCEPT;
 }
@@ -660,13 +672,11 @@ static int nlattr_to_dccp(struct nlattr *cda[], struct nf_conn *ct)
 #endif
 
 #ifdef CONFIG_SYSCTL
-static unsigned int dccp_sysctl_table_users;
-static struct ctl_table_header *dccp_sysctl_header;
-static ctl_table dccp_sysctl_table[] = {
+/* template, data assigned later */
+static struct ctl_table dccp_sysctl_table[] = {
 	{
 		.ctl_name	= CTL_UNNUMBERED,
 		.procname	= "nf_conntrack_dccp_timeout_request",
-		.data		= &dccp_timeout[CT_DCCP_REQUEST],
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_jiffies,
@@ -674,7 +684,6 @@ static ctl_table dccp_sysctl_table[] = {
 	{
 		.ctl_name	= CTL_UNNUMBERED,
 		.procname	= "nf_conntrack_dccp_timeout_respond",
-		.data		= &dccp_timeout[CT_DCCP_RESPOND],
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_jiffies,
@@ -682,7 +691,6 @@ static ctl_table dccp_sysctl_table[] = {
 	{
 		.ctl_name	= CTL_UNNUMBERED,
 		.procname	= "nf_conntrack_dccp_timeout_partopen",
-		.data		= &dccp_timeout[CT_DCCP_PARTOPEN],
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_jiffies,
@@ -690,7 +698,6 @@ static ctl_table dccp_sysctl_table[] = {
 	{
 		.ctl_name	= CTL_UNNUMBERED,
 		.procname	= "nf_conntrack_dccp_timeout_open",
-		.data		= &dccp_timeout[CT_DCCP_OPEN],
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_jiffies,
@@ -698,7 +705,6 @@ static ctl_table dccp_sysctl_table[] = {
 	{
 		.ctl_name	= CTL_UNNUMBERED,
 		.procname	= "nf_conntrack_dccp_timeout_closereq",
-		.data		= &dccp_timeout[CT_DCCP_CLOSEREQ],
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_jiffies,
@@ -706,7 +712,6 @@ static ctl_table dccp_sysctl_table[] = {
 	{
 		.ctl_name	= CTL_UNNUMBERED,
 		.procname	= "nf_conntrack_dccp_timeout_closing",
-		.data		= &dccp_timeout[CT_DCCP_CLOSING],
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_jiffies,
@@ -714,7 +719,6 @@ static ctl_table dccp_sysctl_table[] = {
 	{
 		.ctl_name	= CTL_UNNUMBERED,
 		.procname	= "nf_conntrack_dccp_timeout_timewait",
-		.data		= &dccp_timeout[CT_DCCP_TIMEWAIT],
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_jiffies,
@@ -722,8 +726,7 @@ static ctl_table dccp_sysctl_table[] = {
 	{
 		.ctl_name	= CTL_UNNUMBERED,
 		.procname	= "nf_conntrack_dccp_loose",
-		.data		= &nf_ct_dccp_loose,
-		.maxlen		= sizeof(nf_ct_dccp_loose),
+		.maxlen		= sizeof(int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},
@@ -751,11 +754,6 @@ static struct nf_conntrack_l4proto dccp_proto4 __read_mostly = {
 	.nlattr_to_tuple	= nf_ct_port_nlattr_to_tuple,
 	.nla_policy		= nf_ct_port_nla_policy,
 #endif
-#ifdef CONFIG_SYSCTL
-	.ctl_table_users	= &dccp_sysctl_table_users,
-	.ctl_table_header	= &dccp_sysctl_header,
-	.ctl_table		= dccp_sysctl_table,
-#endif
 };
 
 static struct nf_conntrack_l4proto dccp_proto6 __read_mostly = {
@@ -776,34 +774,107 @@ static struct nf_conntrack_l4proto dccp_proto6 __read_mostly = {
 	.nlattr_to_tuple	= nf_ct_port_nlattr_to_tuple,
 	.nla_policy		= nf_ct_port_nla_policy,
 #endif
+};
+
+static __net_init int dccp_net_init(struct net *net)
+{
+	struct dccp_net *dn;
+	int err;
+
+	dn = kmalloc(sizeof(*dn), GFP_KERNEL);
+	if (!dn)
+		return -ENOMEM;
+
+	/* default values */
+	dn->dccp_loose = 1;
+	dn->dccp_timeout[CT_DCCP_REQUEST]	= 2 * DCCP_MSL;
+	dn->dccp_timeout[CT_DCCP_RESPOND]	= 4 * DCCP_MSL;
+	dn->dccp_timeout[CT_DCCP_PARTOPEN]	= 4 * DCCP_MSL;
+	dn->dccp_timeout[CT_DCCP_OPEN]		= 12 * 3600 * HZ;
+	dn->dccp_timeout[CT_DCCP_CLOSEREQ]	= 64 * HZ;
+	dn->dccp_timeout[CT_DCCP_CLOSING]	= 64 * HZ;
+	dn->dccp_timeout[CT_DCCP_TIMEWAIT]	= 2 * DCCP_MSL;
+
+	err = net_assign_generic(net, dccp_net_id, dn);
+	if (err)
+		goto out;
+
 #ifdef CONFIG_SYSCTL
-	.ctl_table_users	= &dccp_sysctl_table_users,
-	.ctl_table_header	= &dccp_sysctl_header,
-	.ctl_table		= dccp_sysctl_table,
+	err = -ENOMEM;
+	dn->sysctl_table = kmemdup(dccp_sysctl_table,
+			sizeof(dccp_sysctl_table), GFP_KERNEL);
+	if (!dn->sysctl_table)
+		goto out;
+
+	dn->sysctl_table[0].data = &dn->dccp_timeout[CT_DCCP_REQUEST];
+	dn->sysctl_table[1].data = &dn->dccp_timeout[CT_DCCP_RESPOND];
+	dn->sysctl_table[2].data = &dn->dccp_timeout[CT_DCCP_PARTOPEN];
+	dn->sysctl_table[3].data = &dn->dccp_timeout[CT_DCCP_OPEN];
+	dn->sysctl_table[4].data = &dn->dccp_timeout[CT_DCCP_CLOSEREQ];
+	dn->sysctl_table[5].data = &dn->dccp_timeout[CT_DCCP_CLOSING];
+	dn->sysctl_table[6].data = &dn->dccp_timeout[CT_DCCP_TIMEWAIT];
+	dn->sysctl_table[7].data = &dn->dccp_loose;
+
+	dn->sysctl_header = register_net_sysctl_table(net,
+			nf_net_netfilter_sysctl_path, dn->sysctl_table);
+	if (!dn->sysctl_header) {
+		kfree(dn->sysctl_table);
+		goto out;
+	}
 #endif
+
+	return 0;
+
+out:
+	kfree(dn);
+	return err;
+}
+
+static __net_exit void dccp_net_exit(struct net *net)
+{
+	struct dccp_net *dn = dccp_pernet(net);
+#ifdef CONFIG_SYSCTL
+	unregister_net_sysctl_table(dn->sysctl_header);
+	kfree(dn->sysctl_table);
+#endif
+	kfree(dn);
+
+	net_assign_generic(net, dccp_net_id, NULL);
+}
+
+static struct pernet_operations dccp_net_ops = {
+	.init = dccp_net_init,
+	.exit = dccp_net_exit,
 };
 
 static int __init nf_conntrack_proto_dccp_init(void)
 {
 	int err;
 
-	err = nf_conntrack_l4proto_register(&dccp_proto4);
+	err = register_pernet_gen_subsys(&dccp_net_id, &dccp_net_ops);
 	if (err < 0)
 		goto err1;
 
-	err = nf_conntrack_l4proto_register(&dccp_proto6);
+	err = nf_conntrack_l4proto_register(&dccp_proto4);
 	if (err < 0)
 		goto err2;
+
+	err = nf_conntrack_l4proto_register(&dccp_proto6);
+	if (err < 0)
+		goto err3;
 	return 0;
 
-err2:
+err3:
 	nf_conntrack_l4proto_unregister(&dccp_proto4);
+err2:
+	unregister_pernet_gen_subsys(dccp_net_id, &dccp_net_ops);
 err1:
 	return err;
 }
 
 static void __exit nf_conntrack_proto_dccp_fini(void)
 {
+	unregister_pernet_gen_subsys(dccp_net_id, &dccp_net_ops);
 	nf_conntrack_l4proto_unregister(&dccp_proto6);
 	nf_conntrack_l4proto_unregister(&dccp_proto4);
 }

net/netfilter/nf_conntrack_proto_generic.c

@@ -92,7 +92,7 @@ static struct ctl_table generic_compat_sysctl_table[] = {
 struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly =
 {
 	.l3proto		= PF_UNSPEC,
-	.l4proto		= 0,
+	.l4proto		= 255,
 	.name			= "unknown",
 	.pkt_to_tuple		= generic_pkt_to_tuple,
 	.invert_tuple		= generic_invert_tuple,

net/netfilter/nf_conntrack_proto_tcp.c

@@ -25,6 +25,8 @@
 #include <net/netfilter/nf_conntrack_l4proto.h>
 #include <net/netfilter/nf_conntrack_ecache.h>
 #include <net/netfilter/nf_log.h>
+#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
+#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
 
 /* Protects ct->proto.tcp */
 static DEFINE_RWLOCK(tcp_lock);

net/netfilter/nf_conntrack_proto_udp.c

@@ -22,6 +22,8 @@
 #include <net/netfilter/nf_conntrack_l4proto.h>
 #include <net/netfilter/nf_conntrack_ecache.h>
 #include <net/netfilter/nf_log.h>
+#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
+#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
 
 static unsigned int nf_ct_udp_timeout __read_mostly = 30*HZ;
 static unsigned int nf_ct_udp_timeout_stream __read_mostly = 180*HZ;

net/netfilter/nf_log.c

@@ -14,58 +14,63 @@
    LOG target modules */
 
 #define NF_LOG_PREFIXLEN		128
+#define NFLOGGER_NAME_LEN		64
 
 static const struct nf_logger *nf_loggers[NFPROTO_NUMPROTO] __read_mostly;
+static struct list_head nf_loggers_l[NFPROTO_NUMPROTO] __read_mostly;
 static DEFINE_MUTEX(nf_log_mutex);
 
-/* return EBUSY if somebody else is registered, EEXIST if the same logger
- * is registred, 0 on success. */
-int nf_log_register(u_int8_t pf, const struct nf_logger *logger)
+static struct nf_logger *__find_logger(int pf, const char *str_logger)
 {
-	int ret;
+	struct nf_logger *t;
+
+	list_for_each_entry(t, &nf_loggers_l[pf], list[pf]) {
+		if (!strnicmp(str_logger, t->name, strlen(t->name)))
+			return t;
+	}
+
+	return NULL;
+}
+
+/* return EEXIST if the same logger is registred, 0 on success. */
+int nf_log_register(u_int8_t pf, struct nf_logger *logger)
+{
+	const struct nf_logger *llog;
 
 	if (pf >= ARRAY_SIZE(nf_loggers))
 		return -EINVAL;
 
-	/* Any setup of logging members must be done before
-	 * substituting pointer. */
-	ret = mutex_lock_interruptible(&nf_log_mutex);
-	if (ret < 0)
-		return ret;
+	mutex_lock(&nf_log_mutex);
 
-	if (!nf_loggers[pf])
-		rcu_assign_pointer(nf_loggers[pf], logger);
-	else if (nf_loggers[pf] == logger)
-		ret = -EEXIST;
-	else
-		ret = -EBUSY;
+	if (pf == NFPROTO_UNSPEC) {
+		int i;
+		for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++)
+			list_add_tail(&(logger->list[i]), &(nf_loggers_l[i]));
+	} else {
+		/* register at end of list to honor first register win */
+		list_add_tail(&logger->list[pf], &nf_loggers_l[pf]);
+		llog = rcu_dereference(nf_loggers[pf]);
+		if (llog == NULL)
+			rcu_assign_pointer(nf_loggers[pf], logger);
+	}
 
 	mutex_unlock(&nf_log_mutex);
-	return ret;
+
+	return 0;
 }
 EXPORT_SYMBOL(nf_log_register);
 
-void nf_log_unregister_pf(u_int8_t pf)
-{
-	if (pf >= ARRAY_SIZE(nf_loggers))
-		return;
-	mutex_lock(&nf_log_mutex);
-	rcu_assign_pointer(nf_loggers[pf], NULL);
-	mutex_unlock(&nf_log_mutex);
-
-	/* Give time to concurrent readers. */
-	synchronize_rcu();
-}
-EXPORT_SYMBOL(nf_log_unregister_pf);
-
-void nf_log_unregister(const struct nf_logger *logger)
+void nf_log_unregister(struct nf_logger *logger)
 {
+	const struct nf_logger *c_logger;
 	int i;
 
 	mutex_lock(&nf_log_mutex);
 	for (i = 0; i < ARRAY_SIZE(nf_loggers); i++) {
-		if (nf_loggers[i] == logger)
+		c_logger = rcu_dereference(nf_loggers[i]);
+		if (c_logger == logger)
 			rcu_assign_pointer(nf_loggers[i], NULL);
+		list_del(&logger->list[i]);
 	}
 	mutex_unlock(&nf_log_mutex);
 
@@ -73,6 +78,27 @@ void nf_log_unregister(const struct nf_logger *logger)
 }
 EXPORT_SYMBOL(nf_log_unregister);
 
+int nf_log_bind_pf(u_int8_t pf, const struct nf_logger *logger)
+{
+	mutex_lock(&nf_log_mutex);
+	if (__find_logger(pf, logger->name) == NULL) {
+		mutex_unlock(&nf_log_mutex);
+		return -ENOENT;
+	}
+	rcu_assign_pointer(nf_loggers[pf], logger);
+	mutex_unlock(&nf_log_mutex);
+	return 0;
+}
+EXPORT_SYMBOL(nf_log_bind_pf);
+
+void nf_log_unbind_pf(u_int8_t pf)
+{
+	mutex_lock(&nf_log_mutex);
+	rcu_assign_pointer(nf_loggers[pf], NULL);
+	mutex_unlock(&nf_log_mutex);
+}
+EXPORT_SYMBOL(nf_log_unbind_pf);
+
 void nf_log_packet(u_int8_t pf,
 		   unsigned int hooknum,
 		   const struct sk_buff *skb,
@@ -129,13 +155,37 @@ static int seq_show(struct seq_file *s, void *v)
 {
 	loff_t *pos = v;
 	const struct nf_logger *logger;
+	struct nf_logger *t;
+	int ret;
 
 	logger = rcu_dereference(nf_loggers[*pos]);
 
 	if (!logger)
-		return seq_printf(s, "%2lld NONE\n", *pos);
+		ret = seq_printf(s, "%2lld NONE (", *pos);
+	else
+		ret = seq_printf(s, "%2lld %s (", *pos, logger->name);
 
-	return seq_printf(s, "%2lld %s\n", *pos, logger->name);
+	if (ret < 0)
+		return ret;
+
+	mutex_lock(&nf_log_mutex);
+	list_for_each_entry(t, &nf_loggers_l[*pos], list[*pos]) {
+		ret = seq_printf(s, "%s", t->name);
+		if (ret < 0) {
+			mutex_unlock(&nf_log_mutex);
+			return ret;
+		}
+		if (&t->list[*pos] != nf_loggers_l[*pos].prev) {
+			ret = seq_printf(s, ",");
+			if (ret < 0) {
+				mutex_unlock(&nf_log_mutex);
+				return ret;
+			}
+		}
+	}
+	mutex_unlock(&nf_log_mutex);
+
+	return seq_printf(s, ")\n");
 }
 
 static const struct seq_operations nflog_seq_ops = {
@@ -158,15 +208,102 @@ static const struct file_operations nflog_file_ops = {
 	.release = seq_release,
 };
 
+
 #endif /* PROC_FS */
 
+#ifdef CONFIG_SYSCTL
+struct ctl_path nf_log_sysctl_path[] = {
+	{ .procname = "net", .ctl_name = CTL_NET, },
+	{ .procname = "netfilter", .ctl_name = NET_NETFILTER, },
+	{ .procname = "nf_log", .ctl_name = CTL_UNNUMBERED, },
+	{ }
+};
+
+static char nf_log_sysctl_fnames[NFPROTO_NUMPROTO-NFPROTO_UNSPEC][3];
+static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1];
+static struct ctl_table_header *nf_log_dir_header;
+
+static int nf_log_proc_dostring(ctl_table *table, int write, struct file *filp,
+			 void *buffer, size_t *lenp, loff_t *ppos)
+{
+	const struct nf_logger *logger;
+	int r = 0;
+	int tindex = (unsigned long)table->extra1;
+
+	if (write) {
+		if (!strcmp(buffer, "NONE")) {
+			nf_log_unbind_pf(tindex);
+			return 0;
+		}
+		mutex_lock(&nf_log_mutex);
+		logger = __find_logger(tindex, buffer);
+		if (logger == NULL) {
+			mutex_unlock(&nf_log_mutex);
+			return -ENOENT;
+		}
+		rcu_assign_pointer(nf_loggers[tindex], logger);
+		mutex_unlock(&nf_log_mutex);
+	} else {
+		rcu_read_lock();
+		logger = rcu_dereference(nf_loggers[tindex]);
+		if (!logger)
+			table->data = "NONE";
+		else
+			table->data = logger->name;
+		r = proc_dostring(table, write, filp, buffer, lenp, ppos);
+		rcu_read_unlock();
+	}
+
+	return r;
+}
+
+static __init int netfilter_log_sysctl_init(void)
+{
+	int i;
+
+	for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) {
+		snprintf(nf_log_sysctl_fnames[i-NFPROTO_UNSPEC], 3, "%d", i);
+		nf_log_sysctl_table[i].ctl_name	= CTL_UNNUMBERED;
+		nf_log_sysctl_table[i].procname	=
+			nf_log_sysctl_fnames[i-NFPROTO_UNSPEC];
+		nf_log_sysctl_table[i].data = NULL;
+		nf_log_sysctl_table[i].maxlen =
+			NFLOGGER_NAME_LEN * sizeof(char);
+		nf_log_sysctl_table[i].mode = 0644;
+		nf_log_sysctl_table[i].proc_handler = nf_log_proc_dostring;
+		nf_log_sysctl_table[i].extra1 = (void *)(unsigned long) i;
+	}
+
+	nf_log_dir_header = register_sysctl_paths(nf_log_sysctl_path,
+				       nf_log_sysctl_table);
+	if (!nf_log_dir_header)
+		return -ENOMEM;
+
+	return 0;
+}
+#else
+static __init int netfilter_log_sysctl_init(void)
+{
+	return 0;
+}
+#endif /* CONFIG_SYSCTL */
 
 int __init netfilter_log_init(void)
 {
+	int i, r;
 #ifdef CONFIG_PROC_FS
 	if (!proc_create("nf_log", S_IRUGO,
 			 proc_net_netfilter, &nflog_file_ops))
 		return -1;
 #endif
+
+	/* Errors will trigger panic, unroll on error is unnecessary. */
+	r = netfilter_log_sysctl_init();
+	if (r < 0)
+		return r;
+
+	for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++)
+		INIT_LIST_HEAD(&(nf_loggers_l[i]));
+
 	return 0;
 }

net/netfilter/nfnetlink.c

@@ -113,6 +113,12 @@ int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
 }
 EXPORT_SYMBOL_GPL(nfnetlink_send);
 
+void nfnetlink_set_err(u32 pid, u32 group, int error)
+{
+	netlink_set_err(nfnl, pid, group, error);
+}
+EXPORT_SYMBOL_GPL(nfnetlink_set_err);
+
 int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags)
 {
 	return netlink_unicast(nfnl, skb, pid, flags);

net/netfilter/nfnetlink_log.c

@@ -693,7 +693,7 @@ nfulnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
 	return -ENOTSUPP;
 }
 
-static const struct nf_logger nfulnl_logger = {
+static struct nf_logger nfulnl_logger __read_mostly = {
 	.name	= "nfnetlink_log",
 	.logfn	= &nfulnl_log_packet,
 	.me	= THIS_MODULE,
@@ -725,9 +725,9 @@ nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
 		/* Commands without queue context */
 		switch (cmd->command) {
 		case NFULNL_CFG_CMD_PF_BIND:
-			return nf_log_register(pf, &nfulnl_logger);
+			return nf_log_bind_pf(pf, &nfulnl_logger);
 		case NFULNL_CFG_CMD_PF_UNBIND:
-			nf_log_unregister_pf(pf);
+			nf_log_unbind_pf(pf);
 			return 0;
 		}
 	}
@@ -952,17 +952,25 @@ static int __init nfnetlink_log_init(void)
 		goto cleanup_netlink_notifier;
 	}
 
+	status = nf_log_register(NFPROTO_UNSPEC, &nfulnl_logger);
+	if (status < 0) {
+		printk(KERN_ERR "log: failed to register logger\n");
+		goto cleanup_subsys;
+	}
+
 #ifdef CONFIG_PROC_FS
 	if (!proc_create("nfnetlink_log", 0440,
 			 proc_net_netfilter, &nful_file_ops))
-		goto cleanup_subsys;
+		goto cleanup_logger;
 #endif
 	return status;
 
 #ifdef CONFIG_PROC_FS
+cleanup_logger:
+	nf_log_unregister(&nfulnl_logger);
+#endif
 cleanup_subsys:
 	nfnetlink_subsys_unregister(&nfulnl_subsys);
-#endif
 cleanup_netlink_notifier:
 	netlink_unregister_notifier(&nfulnl_rtnl_notifier);
 	return status;

net/netfilter/x_tables.c

@@ -625,6 +625,20 @@ void xt_free_table_info(struct xt_table_info *info)
 }
 EXPORT_SYMBOL(xt_free_table_info);
 
+void xt_table_entry_swap_rcu(struct xt_table_info *oldinfo,
+			     struct xt_table_info *newinfo)
+{
+	unsigned int cpu;
+
+	for_each_possible_cpu(cpu) {
+		void *p = oldinfo->entries[cpu];
+		rcu_assign_pointer(oldinfo->entries[cpu], newinfo->entries[cpu]);
+		newinfo->entries[cpu] = p;
+	}
+
+}
+EXPORT_SYMBOL_GPL(xt_table_entry_swap_rcu);
+
 /* Find table by name, grabs mutex & ref.  Returns ERR_PTR() on error. */
 struct xt_table *xt_find_table_lock(struct net *net, u_int8_t af,
 				    const char *name)
@@ -671,21 +685,22 @@ xt_replace_table(struct xt_table *table,
 	struct xt_table_info *oldinfo, *private;
 
 	/* Do the substitution. */
-	write_lock_bh(&table->lock);
+	mutex_lock(&table->lock);
 	private = table->private;
 	/* Check inside lock: is the old number correct? */
 	if (num_counters != private->number) {
 		duprintf("num_counters != table->private->number (%u/%u)\n",
 			 num_counters, private->number);
-		write_unlock_bh(&table->lock);
+		mutex_unlock(&table->lock);
 		*error = -EAGAIN;
 		return NULL;
 	}
 	oldinfo = private;
-	table->private = newinfo;
+	rcu_assign_pointer(table->private, newinfo);
 	newinfo->initial_entries = oldinfo->initial_entries;
-	write_unlock_bh(&table->lock);
+	mutex_unlock(&table->lock);
 
+	synchronize_net();
 	return oldinfo;
 }
 EXPORT_SYMBOL_GPL(xt_replace_table);
@@ -719,7 +734,8 @@ struct xt_table *xt_register_table(struct net *net, struct xt_table *table,
 
 	/* Simplifies replace_table code. */
 	table->private = bootstrap;
-	rwlock_init(&table->lock);
+	mutex_init(&table->lock);
+
 	if (!xt_replace_table(table, 0, newinfo, &ret))
 		goto unlock;
 

net/netfilter/xt_HL.c

@@ -0,0 +1,171 @@
+/*
+ * TTL modification target for IP tables
+ * (C) 2000,2005 by Harald Welte <laforge@netfilter.org>
+ *
+ * Hop Limit modification target for ip6tables
+ * Maciej Soltysiak <solt@dns.toxicfilms.tv>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <net/checksum.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_ipv4/ipt_TTL.h>
+#include <linux/netfilter_ipv6/ip6t_HL.h>
+
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
+MODULE_DESCRIPTION("Xtables: Hoplimit/TTL Limit field modification target");
+MODULE_LICENSE("GPL");
+
+static unsigned int
+ttl_tg(struct sk_buff *skb, const struct xt_target_param *par)
+{
+	struct iphdr *iph;
+	const struct ipt_TTL_info *info = par->targinfo;
+	int new_ttl;
+
+	if (!skb_make_writable(skb, skb->len))
+		return NF_DROP;
+
+	iph = ip_hdr(skb);
+
+	switch (info->mode) {
+		case IPT_TTL_SET:
+			new_ttl = info->ttl;
+			break;
+		case IPT_TTL_INC:
+			new_ttl = iph->ttl + info->ttl;
+			if (new_ttl > 255)
+				new_ttl = 255;
+			break;
+		case IPT_TTL_DEC:
+			new_ttl = iph->ttl - info->ttl;
+			if (new_ttl < 0)
+				new_ttl = 0;
+			break;
+		default:
+			new_ttl = iph->ttl;
+			break;
+	}
+
+	if (new_ttl != iph->ttl) {
+		csum_replace2(&iph->check, htons(iph->ttl << 8),
+					   htons(new_ttl << 8));
+		iph->ttl = new_ttl;
+	}
+
+	return XT_CONTINUE;
+}
+
+static unsigned int
+hl_tg6(struct sk_buff *skb, const struct xt_target_param *par)
+{
+	struct ipv6hdr *ip6h;
+	const struct ip6t_HL_info *info = par->targinfo;
+	int new_hl;
+
+	if (!skb_make_writable(skb, skb->len))
+		return NF_DROP;
+
+	ip6h = ipv6_hdr(skb);
+
+	switch (info->mode) {
+		case IP6T_HL_SET:
+			new_hl = info->hop_limit;
+			break;
+		case IP6T_HL_INC:
+			new_hl = ip6h->hop_limit + info->hop_limit;
+			if (new_hl > 255)
+				new_hl = 255;
+			break;
+		case IP6T_HL_DEC:
+			new_hl = ip6h->hop_limit - info->hop_limit;
+			if (new_hl < 0)
+				new_hl = 0;
+			break;
+		default:
+			new_hl = ip6h->hop_limit;
+			break;
+	}
+
+	ip6h->hop_limit = new_hl;
+
+	return XT_CONTINUE;
+}
+
+static bool ttl_tg_check(const struct xt_tgchk_param *par)
+{
+	const struct ipt_TTL_info *info = par->targinfo;
+
+	if (info->mode > IPT_TTL_MAXMODE) {
+		printk(KERN_WARNING "ipt_TTL: invalid or unknown Mode %u\n",
+			info->mode);
+		return false;
+	}
+	if (info->mode != IPT_TTL_SET && info->ttl == 0)
+		return false;
+	return true;
+}
+
+static bool hl_tg6_check(const struct xt_tgchk_param *par)
+{
+	const struct ip6t_HL_info *info = par->targinfo;
+
+	if (info->mode > IP6T_HL_MAXMODE) {
+		printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
+			info->mode);
+		return false;
+	}
+	if (info->mode != IP6T_HL_SET && info->hop_limit == 0) {
+		printk(KERN_WARNING "ip6t_HL: increment/decrement doesn't "
+			"make sense with value 0\n");
+		return false;
+	}
+	return true;
+}
+
+static struct xt_target hl_tg_reg[] __read_mostly = {
+	{
+		.name       = "TTL",
+		.revision   = 0,
+		.family     = NFPROTO_IPV4,
+		.target     = ttl_tg,
+		.targetsize = sizeof(struct ipt_TTL_info),
+		.table      = "mangle",
+		.checkentry = ttl_tg_check,
+		.me         = THIS_MODULE,
+	},
+	{
+		.name       = "HL",
+		.revision   = 0,
+		.family     = NFPROTO_IPV6,
+		.target     = hl_tg6,
+		.targetsize = sizeof(struct ip6t_HL_info),
+		.table      = "mangle",
+		.checkentry = hl_tg6_check,
+		.me         = THIS_MODULE,
+	},
+};
+
+static int __init hl_tg_init(void)
+{
+	return xt_register_targets(hl_tg_reg, ARRAY_SIZE(hl_tg_reg));
+}
+
+static void __exit hl_tg_exit(void)
+{
+	xt_unregister_targets(hl_tg_reg, ARRAY_SIZE(hl_tg_reg));
+}
+
+module_init(hl_tg_init);
+module_exit(hl_tg_exit);
+MODULE_ALIAS("ipt_TTL");
+MODULE_ALIAS("ip6t_HL");

net/netfilter/xt_LED.c

@@ -0,0 +1,161 @@
+/*
+ * xt_LED.c - netfilter target to make LEDs blink upon packet matches
+ *
+ * Copyright (C) 2008 Adam Nielsen <a.nielsen@shikadi.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/leds.h>
+#include <linux/mutex.h>
+
+#include <linux/netfilter/xt_LED.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Adam Nielsen <a.nielsen@shikadi.net>");
+MODULE_DESCRIPTION("Xtables: trigger LED devices on packet match");
+
+/*
+ * This is declared in here (the kernel module) only, to avoid having these
+ * dependencies in userspace code.  This is what xt_led_info.internal_data
+ * points to.
+ */
+struct xt_led_info_internal {
+	struct led_trigger netfilter_led_trigger;
+	struct timer_list timer;
+};
+
+static unsigned int
+led_tg(struct sk_buff *skb, const struct xt_target_param *par)
+{
+	const struct xt_led_info *ledinfo = par->targinfo;
+	struct xt_led_info_internal *ledinternal = ledinfo->internal_data;
+
+	/*
+	 * If "always blink" is enabled, and there's still some time until the
+	 * LED will switch off, briefly switch it off now.
+	 */
+	if ((ledinfo->delay > 0) && ledinfo->always_blink &&
+	    timer_pending(&ledinternal->timer))
+		led_trigger_event(&ledinternal->netfilter_led_trigger,LED_OFF);
+
+	led_trigger_event(&ledinternal->netfilter_led_trigger, LED_FULL);
+
+	/* If there's a positive delay, start/update the timer */
+	if (ledinfo->delay > 0) {
+		mod_timer(&ledinternal->timer,
+			  jiffies + msecs_to_jiffies(ledinfo->delay));
+
+	/* Otherwise if there was no delay given, blink as fast as possible */
+	} else if (ledinfo->delay == 0) {
+		led_trigger_event(&ledinternal->netfilter_led_trigger, LED_OFF);
+	}
+
+	/* else the delay is negative, which means switch on and stay on */
+
+	return XT_CONTINUE;
+}
+
+static void led_timeout_callback(unsigned long data)
+{
+	struct xt_led_info *ledinfo = (struct xt_led_info *)data;
+	struct xt_led_info_internal *ledinternal = ledinfo->internal_data;
+
+	led_trigger_event(&ledinternal->netfilter_led_trigger, LED_OFF);
+}
+
+static bool led_tg_check(const struct xt_tgchk_param *par)
+{
+	struct xt_led_info *ledinfo = par->targinfo;
+	struct xt_led_info_internal *ledinternal;
+	int err;
+
+	if (ledinfo->id[0] == '\0') {
+		printk(KERN_ERR KBUILD_MODNAME ": No 'id' parameter given.\n");
+		return false;
+	}
+
+	ledinternal = kzalloc(sizeof(struct xt_led_info_internal), GFP_KERNEL);
+	if (!ledinternal) {
+		printk(KERN_CRIT KBUILD_MODNAME ": out of memory\n");
+		return false;
+	}
+
+	ledinternal->netfilter_led_trigger.name = ledinfo->id;
+
+	err = led_trigger_register(&ledinternal->netfilter_led_trigger);
+	if (err) {
+		printk(KERN_CRIT KBUILD_MODNAME
+			": led_trigger_register() failed\n");
+		if (err == -EEXIST)
+			printk(KERN_ERR KBUILD_MODNAME
+				": Trigger name is already in use.\n");
+		goto exit_alloc;
+	}
+
+	/* See if we need to set up a timer */
+	if (ledinfo->delay > 0)
+		setup_timer(&ledinternal->timer, led_timeout_callback,
+			    (unsigned long)ledinfo);
+
+	ledinfo->internal_data = ledinternal;
+
+	return true;
+
+exit_alloc:
+	kfree(ledinternal);
+
+	return false;
+}
+
+static void led_tg_destroy(const struct xt_tgdtor_param *par)
+{
+	const struct xt_led_info *ledinfo = par->targinfo;
+	struct xt_led_info_internal *ledinternal = ledinfo->internal_data;
+
+	if (ledinfo->delay > 0)
+		del_timer_sync(&ledinternal->timer);
+
+	led_trigger_unregister(&ledinternal->netfilter_led_trigger);
+	kfree(ledinternal);
+}
+
+static struct xt_target led_tg_reg __read_mostly = {
+	.name		= "LED",
+	.revision	= 0,
+	.family		= NFPROTO_UNSPEC,
+	.target		= led_tg,
+	.targetsize	= XT_ALIGN(sizeof(struct xt_led_info)),
+	.checkentry	= led_tg_check,
+	.destroy	= led_tg_destroy,
+	.me		= THIS_MODULE,
+};
+
+static int __init led_tg_init(void)
+{
+	return xt_register_target(&led_tg_reg);
+}
+
+static void __exit led_tg_exit(void)
+{
+	xt_unregister_target(&led_tg_reg);
+}
+
+module_init(led_tg_init);
+module_exit(led_tg_exit);

net/netfilter/xt_cluster.c

@@ -0,0 +1,164 @@
+/*
+ * (C) 2008-2009 Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/jhash.h>
+#include <linux/ip.h>
+#include <net/ipv6.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <linux/netfilter/xt_cluster.h>
+
+static inline u_int32_t nf_ct_orig_ipv4_src(const struct nf_conn *ct)
+{
+	return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip;
+}
+
+static inline const void *nf_ct_orig_ipv6_src(const struct nf_conn *ct)
+{
+	return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip6;
+}
+
+static inline u_int32_t
+xt_cluster_hash_ipv4(u_int32_t ip, const struct xt_cluster_match_info *info)
+{
+	return jhash_1word(ip, info->hash_seed);
+}
+
+static inline u_int32_t
+xt_cluster_hash_ipv6(const void *ip, const struct xt_cluster_match_info *info)
+{
+	return jhash2(ip, NF_CT_TUPLE_L3SIZE / sizeof(__u32), info->hash_seed);
+}
+
+static inline u_int32_t
+xt_cluster_hash(const struct nf_conn *ct,
+		const struct xt_cluster_match_info *info)
+{
+	u_int32_t hash = 0;
+
+	switch(nf_ct_l3num(ct)) {
+	case AF_INET:
+		hash = xt_cluster_hash_ipv4(nf_ct_orig_ipv4_src(ct), info);
+		break;
+	case AF_INET6:
+		hash = xt_cluster_hash_ipv6(nf_ct_orig_ipv6_src(ct), info);
+		break;
+	default:
+		WARN_ON(1);
+		break;
+	}
+	return (((u64)hash * info->total_nodes) >> 32);
+}
+
+static inline bool
+xt_cluster_is_multicast_addr(const struct sk_buff *skb, u_int8_t family)
+{
+	bool is_multicast = false;
+
+	switch(family) {
+	case NFPROTO_IPV4:
+		is_multicast = ipv4_is_multicast(ip_hdr(skb)->daddr);
+		break;
+	case NFPROTO_IPV6:
+		is_multicast = ipv6_addr_type(&ipv6_hdr(skb)->daddr) &
+						IPV6_ADDR_MULTICAST;
+		break;
+	default:
+		WARN_ON(1);
+		break;
+	}
+	return is_multicast;
+}
+
+static bool
+xt_cluster_mt(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+	struct sk_buff *pskb = (struct sk_buff *)skb;
+	const struct xt_cluster_match_info *info = par->matchinfo;
+	const struct nf_conn *ct;
+	enum ip_conntrack_info ctinfo;
+	unsigned long hash;
+
+	/* This match assumes that all nodes see the same packets. This can be
+	 * achieved if the switch that connects the cluster nodes support some
+	 * sort of 'port mirroring'. However, if your switch does not support
+	 * this, your cluster nodes can reply ARP request using a multicast MAC
+	 * address. Thus, your switch will flood the same packets to the
+	 * cluster nodes with the same multicast MAC address. Using a multicast
+	 * link address is a RFC 1812 (section 3.3.2) violation, but this works
+	 * fine in practise.
+	 *
+	 * Unfortunately, if you use the multicast MAC address, the link layer
+	 * sets skbuff's pkt_type to PACKET_MULTICAST, which is not accepted
+	 * by TCP and others for packets coming to this node. For that reason,
+	 * this match mangles skbuff's pkt_type if it detects a packet
+	 * addressed to a unicast address but using PACKET_MULTICAST. Yes, I
+	 * know, matches should not alter packets, but we are doing this here
+	 * because we would need to add a PKTTYPE target for this sole purpose.
+	 */
+	if (!xt_cluster_is_multicast_addr(skb, par->family) &&
+	    skb->pkt_type == PACKET_MULTICAST) {
+	    	pskb->pkt_type = PACKET_HOST;
+	}
+
+	ct = nf_ct_get(skb, &ctinfo);
+	if (ct == NULL)
+		return false;
+
+	if (ct == &nf_conntrack_untracked)
+		return false;
+
+	if (ct->master)
+		hash = xt_cluster_hash(ct->master, info);
+	else
+		hash = xt_cluster_hash(ct, info);
+
+	return !!((1 << hash) & info->node_mask) ^
+	       !!(info->flags & XT_CLUSTER_F_INV);
+}
+
+static bool xt_cluster_mt_checkentry(const struct xt_mtchk_param *par)
+{
+	struct xt_cluster_match_info *info = par->matchinfo;
+
+	if (info->node_mask >= (1 << info->total_nodes)) {
+		printk(KERN_ERR "xt_cluster: this node mask cannot be "
+				"higher than the total number of nodes\n");
+		return false;
+	}
+	return true;
+}
+
+static struct xt_match xt_cluster_match __read_mostly = {
+	.name		= "cluster",
+	.family		= NFPROTO_UNSPEC,
+	.match		= xt_cluster_mt,
+	.checkentry	= xt_cluster_mt_checkentry,
+	.matchsize	= sizeof(struct xt_cluster_match_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init xt_cluster_mt_init(void)
+{
+	return xt_register_match(&xt_cluster_match);
+}
+
+static void __exit xt_cluster_mt_fini(void)
+{
+	xt_unregister_match(&xt_cluster_match);
+}
+
+MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Xtables: hash-based cluster match");
+MODULE_ALIAS("ipt_cluster");
+MODULE_ALIAS("ip6t_cluster");
+module_init(xt_cluster_mt_init);
+module_exit(xt_cluster_mt_fini);

net/netfilter/xt_hashlimit.c

@@ -149,7 +149,7 @@ dsthash_alloc_init(struct xt_hashlimit_htable *ht,
 	/* initialize hash with random val at the time we allocate
 	 * the first hashtable entry */
 	if (!ht->rnd_initialized) {
-		get_random_bytes(&ht->rnd, 4);
+		get_random_bytes(&ht->rnd, sizeof(ht->rnd));
 		ht->rnd_initialized = 1;
 	}
 
@@ -565,8 +565,7 @@ hashlimit_init_dst(const struct xt_hashlimit_htable *hinfo,
 static bool
 hashlimit_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
 {
-	const struct xt_hashlimit_info *r =
-		((const struct xt_hashlimit_info *)par->matchinfo)->u.master;
+	const struct xt_hashlimit_info *r = par->matchinfo;
 	struct xt_hashlimit_htable *hinfo = r->hinfo;
 	unsigned long now = jiffies;
 	struct dsthash_ent *dh;
@@ -702,8 +701,6 @@ static bool hashlimit_mt_check_v0(const struct xt_mtchk_param *par)
 	}
 	mutex_unlock(&hlimit_mutex);
 
-	/* Ugly hack: For SMP, we only want to use one set */
-	r->u.master = r;
 	return true;
 }
 

net/netfilter/xt_hl.c

@@ -0,0 +1,108 @@
+/*
+ * IP tables module for matching the value of the TTL
+ * (C) 2000,2001 by Harald Welte <laforge@netfilter.org>
+ *
+ * Hop Limit matching module
+ * (C) 2001-2002 Maciej Soltysiak <solt@dns.toxicfilms.tv>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_ipv4/ipt_ttl.h>
+#include <linux/netfilter_ipv6/ip6t_hl.h>
+
+MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
+MODULE_DESCRIPTION("Xtables: Hoplimit/TTL field match");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_ttl");
+MODULE_ALIAS("ip6t_hl");
+
+static bool ttl_mt(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+	const struct ipt_ttl_info *info = par->matchinfo;
+	const u8 ttl = ip_hdr(skb)->ttl;
+
+	switch (info->mode) {
+		case IPT_TTL_EQ:
+			return ttl == info->ttl;
+		case IPT_TTL_NE:
+			return ttl != info->ttl;
+		case IPT_TTL_LT:
+			return ttl < info->ttl;
+		case IPT_TTL_GT:
+			return ttl > info->ttl;
+		default:
+			printk(KERN_WARNING "ipt_ttl: unknown mode %d\n",
+				info->mode);
+			return false;
+	}
+
+	return false;
+}
+
+static bool hl_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
+{
+	const struct ip6t_hl_info *info = par->matchinfo;
+	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
+
+	switch (info->mode) {
+		case IP6T_HL_EQ:
+			return ip6h->hop_limit == info->hop_limit;
+			break;
+		case IP6T_HL_NE:
+			return ip6h->hop_limit != info->hop_limit;
+			break;
+		case IP6T_HL_LT:
+			return ip6h->hop_limit < info->hop_limit;
+			break;
+		case IP6T_HL_GT:
+			return ip6h->hop_limit > info->hop_limit;
+			break;
+		default:
+			printk(KERN_WARNING "ip6t_hl: unknown mode %d\n",
+				info->mode);
+			return false;
+	}
+
+	return false;
+}
+
+static struct xt_match hl_mt_reg[] __read_mostly = {
+	{
+		.name       = "ttl",
+		.revision   = 0,
+		.family     = NFPROTO_IPV4,
+		.match      = ttl_mt,
+		.matchsize  = sizeof(struct ipt_ttl_info),
+		.me         = THIS_MODULE,
+	},
+	{
+		.name       = "hl",
+		.revision   = 0,
+		.family     = NFPROTO_IPV6,
+		.match      = hl_mt6,
+		.matchsize  = sizeof(struct ip6t_hl_info),
+		.me         = THIS_MODULE,
+	},
+};
+
+static int __init hl_mt_init(void)
+{
+	return xt_register_matches(hl_mt_reg, ARRAY_SIZE(hl_mt_reg));
+}
+
+static void __exit hl_mt_exit(void)
+{
+	xt_unregister_matches(hl_mt_reg, ARRAY_SIZE(hl_mt_reg));
+}
+
+module_init(hl_mt_init);
+module_exit(hl_mt_exit);

net/netfilter/xt_limit.c

@@ -14,6 +14,11 @@
 #include <linux/netfilter/x_tables.h>
 #include <linux/netfilter/xt_limit.h>
 
+struct xt_limit_priv {
+	unsigned long prev;
+	uint32_t credit;
+};
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Herve Eychenne <rv@wallfire.org>");
 MODULE_DESCRIPTION("Xtables: rate-limit match");
@@ -60,18 +65,18 @@ static DEFINE_SPINLOCK(limit_lock);
 static bool
 limit_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 {
-	struct xt_rateinfo *r =
-		((const struct xt_rateinfo *)par->matchinfo)->master;
+	const struct xt_rateinfo *r = par->matchinfo;
+	struct xt_limit_priv *priv = r->master;
 	unsigned long now = jiffies;
 
 	spin_lock_bh(&limit_lock);
-	r->credit += (now - xchg(&r->prev, now)) * CREDITS_PER_JIFFY;
-	if (r->credit > r->credit_cap)
-		r->credit = r->credit_cap;
+	priv->credit += (now - xchg(&priv->prev, now)) * CREDITS_PER_JIFFY;
+	if (priv->credit > r->credit_cap)
+		priv->credit = r->credit_cap;
 
-	if (r->credit >= r->cost) {
+	if (priv->credit >= r->cost) {
 		/* We're not limited. */
-		r->credit -= r->cost;
+		priv->credit -= r->cost;
 		spin_unlock_bh(&limit_lock);
 		return true;
 	}
@@ -95,6 +100,7 @@ user2credits(u_int32_t user)
 static bool limit_mt_check(const struct xt_mtchk_param *par)
 {
 	struct xt_rateinfo *r = par->matchinfo;
+	struct xt_limit_priv *priv;
 
 	/* Check for overflow. */
 	if (r->burst == 0
@@ -104,19 +110,30 @@ static bool limit_mt_check(const struct xt_mtchk_param *par)
 		return false;
 	}
 
-	/* For SMP, we only want to use one set of counters. */
-	r->master = r;
+	priv = kmalloc(sizeof(*priv), GFP_KERNEL);
+	if (priv == NULL)
+		return -ENOMEM;
+
+	/* For SMP, we only want to use one set of state. */
+	r->master = priv;
 	if (r->cost == 0) {
 		/* User avg in seconds * XT_LIMIT_SCALE: convert to jiffies *
 		   128. */
-		r->prev = jiffies;
-		r->credit = user2credits(r->avg * r->burst);	 /* Credits full. */
+		priv->prev = jiffies;
+		priv->credit = user2credits(r->avg * r->burst); /* Credits full. */
 		r->credit_cap = user2credits(r->avg * r->burst); /* Credits full. */
 		r->cost = user2credits(r->avg);
 	}
 	return true;
 }
 
+static void limit_mt_destroy(const struct xt_mtdtor_param *par)
+{
+	const struct xt_rateinfo *info = par->matchinfo;
+
+	kfree(info->master);
+}
+
 #ifdef CONFIG_COMPAT
 struct compat_xt_rateinfo {
 	u_int32_t avg;
@@ -167,6 +184,7 @@ static struct xt_match limit_mt_reg __read_mostly = {
 	.family           = NFPROTO_UNSPEC,
 	.match            = limit_mt,
 	.checkentry       = limit_mt_check,
+	.destroy          = limit_mt_destroy,
 	.matchsize        = sizeof(struct xt_rateinfo),
 #ifdef CONFIG_COMPAT
 	.compatsize       = sizeof(struct compat_xt_rateinfo),

net/netfilter/xt_physdev.c

@@ -20,13 +20,30 @@ MODULE_DESCRIPTION("Xtables: Bridge physical device match");
 MODULE_ALIAS("ipt_physdev");
 MODULE_ALIAS("ip6t_physdev");
 
+static unsigned long ifname_compare(const char *_a, const char *_b, const char *_mask)
+{
+	const unsigned long *a = (const unsigned long *)_a;
+	const unsigned long *b = (const unsigned long *)_b;
+	const unsigned long *mask = (const unsigned long *)_mask;
+	unsigned long ret;
+
+	ret = (a[0] ^ b[0]) & mask[0];
+	if (IFNAMSIZ > sizeof(unsigned long))
+		ret |= (a[1] ^ b[1]) & mask[1];
+	if (IFNAMSIZ > 2 * sizeof(unsigned long))
+		ret |= (a[2] ^ b[2]) & mask[2];
+	if (IFNAMSIZ > 3 * sizeof(unsigned long))
+		ret |= (a[3] ^ b[3]) & mask[3];
+	BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
+	return ret;
+}
+
 static bool
 physdev_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 {
-	int i;
-	static const char nulldevname[IFNAMSIZ];
+	static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long))));
 	const struct xt_physdev_info *info = par->matchinfo;
-	bool ret;
+	unsigned long ret;
 	const char *indev, *outdev;
 	const struct nf_bridge_info *nf_bridge;
 
@@ -68,11 +85,7 @@ physdev_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 	if (!(info->bitmask & XT_PHYSDEV_OP_IN))
 		goto match_outdev;
 	indev = nf_bridge->physindev ? nf_bridge->physindev->name : nulldevname;
-	for (i = 0, ret = false; i < IFNAMSIZ/sizeof(unsigned int); i++) {
-		ret |= (((const unsigned int *)indev)[i]
-			^ ((const unsigned int *)info->physindev)[i])
-			& ((const unsigned int *)info->in_mask)[i];
-	}
+	ret = ifname_compare(indev, info->physindev, info->in_mask);
 
 	if (!ret ^ !(info->invert & XT_PHYSDEV_OP_IN))
 		return false;
@@ -82,13 +95,9 @@ match_outdev:
 		return true;
 	outdev = nf_bridge->physoutdev ?
 		 nf_bridge->physoutdev->name : nulldevname;
-	for (i = 0, ret = false; i < IFNAMSIZ/sizeof(unsigned int); i++) {
-		ret |= (((const unsigned int *)outdev)[i]
-			^ ((const unsigned int *)info->physoutdev)[i])
-			& ((const unsigned int *)info->out_mask)[i];
-	}
+	ret = ifname_compare(outdev, info->physoutdev, info->out_mask);
 
-	return ret ^ !(info->invert & XT_PHYSDEV_OP_OUT);
+	return (!!ret ^ !(info->invert & XT_PHYSDEV_OP_OUT));
 }
 
 static bool physdev_mt_check(const struct xt_mtchk_param *par)

net/netfilter/xt_quota.c

@@ -9,6 +9,10 @@
 #include <linux/netfilter/x_tables.h>
 #include <linux/netfilter/xt_quota.h>
 
+struct xt_quota_priv {
+	uint64_t quota;
+};
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Sam Johnston <samj@samj.net>");
 MODULE_DESCRIPTION("Xtables: countdown quota match");
@@ -20,18 +24,20 @@ static DEFINE_SPINLOCK(quota_lock);
 static bool
 quota_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 {
-	struct xt_quota_info *q =
-		((const struct xt_quota_info *)par->matchinfo)->master;
+	struct xt_quota_info *q = (void *)par->matchinfo;
+	struct xt_quota_priv *priv = q->master;
 	bool ret = q->flags & XT_QUOTA_INVERT;
 
 	spin_lock_bh(&quota_lock);
-	if (q->quota >= skb->len) {
-		q->quota -= skb->len;
+	if (priv->quota >= skb->len) {
+		priv->quota -= skb->len;
 		ret = !ret;
 	} else {
 		/* we do not allow even small packets from now on */
-		q->quota = 0;
+		priv->quota = 0;
 	}
+	/* Copy quota back to matchinfo so that iptables can display it */
+	q->quota = priv->quota;
 	spin_unlock_bh(&quota_lock);
 
 	return ret;
@@ -43,17 +49,28 @@ static bool quota_mt_check(const struct xt_mtchk_param *par)
 
 	if (q->flags & ~XT_QUOTA_MASK)
 		return false;
-	/* For SMP, we only want to use one set of counters. */
-	q->master = q;
+
+	q->master = kmalloc(sizeof(*q->master), GFP_KERNEL);
+	if (q->master == NULL)
+		return -ENOMEM;
+
 	return true;
 }
 
+static void quota_mt_destroy(const struct xt_mtdtor_param *par)
+{
+	const struct xt_quota_info *q = par->matchinfo;
+
+	kfree(q->master);
+}
+
 static struct xt_match quota_mt_reg __read_mostly = {
 	.name       = "quota",
 	.revision   = 0,
 	.family     = NFPROTO_UNSPEC,
 	.match      = quota_mt,
 	.checkentry = quota_mt_check,
+	.destroy    = quota_mt_destroy,
 	.matchsize  = sizeof(struct xt_quota_info),
 	.me         = THIS_MODULE,
 };

net/netfilter/xt_statistic.c

@@ -16,6 +16,10 @@
 #include <linux/netfilter/xt_statistic.h>
 #include <linux/netfilter/x_tables.h>
 
+struct xt_statistic_priv {
+	uint32_t count;
+};
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
 MODULE_DESCRIPTION("Xtables: statistics-based matching (\"Nth\", random)");
@@ -27,7 +31,7 @@ static DEFINE_SPINLOCK(nth_lock);
 static bool
 statistic_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 {
-	struct xt_statistic_info *info = (void *)par->matchinfo;
+	const struct xt_statistic_info *info = par->matchinfo;
 	bool ret = info->flags & XT_STATISTIC_INVERT;
 
 	switch (info->mode) {
@@ -36,10 +40,9 @@ statistic_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 			ret = !ret;
 		break;
 	case XT_STATISTIC_MODE_NTH:
-		info = info->master;
 		spin_lock_bh(&nth_lock);
-		if (info->u.nth.count++ == info->u.nth.every) {
-			info->u.nth.count = 0;
+		if (info->master->count++ == info->u.nth.every) {
+			info->master->count = 0;
 			ret = !ret;
 		}
 		spin_unlock_bh(&nth_lock);
@@ -56,16 +59,31 @@ static bool statistic_mt_check(const struct xt_mtchk_param *par)
 	if (info->mode > XT_STATISTIC_MODE_MAX ||
 	    info->flags & ~XT_STATISTIC_MASK)
 		return false;
-	info->master = info;
+
+	info->master = kzalloc(sizeof(*info->master), GFP_KERNEL);
+	if (info->master == NULL) {
+		printk(KERN_ERR KBUILD_MODNAME ": Out of memory\n");
+		return false;
+	}
+	info->master->count = info->u.nth.count;
+
 	return true;
 }
 
+static void statistic_mt_destroy(const struct xt_mtdtor_param *par)
+{
+	const struct xt_statistic_info *info = par->matchinfo;
+
+	kfree(info->master);
+}
+
 static struct xt_match xt_statistic_mt_reg __read_mostly = {
 	.name       = "statistic",
 	.revision   = 0,
 	.family     = NFPROTO_UNSPEC,
 	.match      = statistic_mt,
 	.checkentry = statistic_mt_check,
+	.destroy    = statistic_mt_destroy,
 	.matchsize  = sizeof(struct xt_statistic_info),
 	.me         = THIS_MODULE,
 };