[nf-next,v2,2/2] netfilter: rename nfnetlink_queue_core.c to nfnetlink_queue.c

diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 4d68e72..7638c36 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -10,7 +10,6 @@  obj-$(CONFIG_NETFILTER) = netfilter.o
 
 obj-$(CONFIG_NETFILTER_NETLINK) += nfnetlink.o
 obj-$(CONFIG_NETFILTER_NETLINK_ACCT) += nfnetlink_acct.o
-nfnetlink_queue-y := nfnetlink_queue_core.o
 obj-$(CONFIG_NETFILTER_NETLINK_QUEUE) += nfnetlink_queue.o
 obj-$(CONFIG_NETFILTER_NETLINK_LOG) += nfnetlink_log.o
 
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
new file mode 100644
index 0000000..b1f1c74
--- /dev/null
+++ b/net/netfilter/nfnetlink_queue.c
@@ -0,0 +1,1443 @@ 
+/*
+ * This is a module which is used for queueing packets and communicating with
+ * userspace via nfnetlink.
+ *
+ * (C) 2005 by Harald Welte <laforge@netfilter.org>
+ * (C) 2007 by Patrick McHardy <kaber@trash.net>
+ *
+ * Based on the old ipv4-only ip_queue.c:
+ * (C) 2000-2002 James Morris <jmorris@intercode.com.au>
+ * (C) 2003-2005 Netfilter Core Team <coreteam@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/init.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/notifier.h>
+#include <linux/netdevice.h>
+#include <linux/netfilter.h>
+#include <linux/proc_fs.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nfnetlink_queue.h>
+#include <linux/netfilter/nf_conntrack_common.h>
+#include <linux/list.h>
+#include <net/sock.h>
+#include <net/tcp_states.h>
+#include <net/netfilter/nf_queue.h>
+#include <net/netns/generic.h>
+
+#include <linux/atomic.h>
+
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+#include "../bridge/br_private.h"
+#endif
+
+#define NFQNL_QMAX_DEFAULT 1024
+
+/* We're using struct nlattr which has 16bit nla_len. Note that nla_len
+ * includes the header length. Thus, the maximum packet length that we
+ * support is 65531 bytes. We send truncated packets if the specified length
+ * is larger than that.  Userspace can check for presence of NFQA_CAP_LEN
+ * attribute to detect truncation.
+ */
+#define NFQNL_MAX_COPY_RANGE (0xffff - NLA_HDRLEN)
+
+struct nfqnl_instance {
+	struct hlist_node hlist;		/* global list of queues */
+	struct rcu_head rcu;
+
+	u32 peer_portid;
+	unsigned int queue_maxlen;
+	unsigned int copy_range;
+	unsigned int queue_dropped;
+	unsigned int queue_user_dropped;
+
+
+	u_int16_t queue_num;			/* number of this queue */
+	u_int8_t copy_mode;
+	u_int32_t flags;			/* Set using NFQA_CFG_FLAGS */
+/*
+ * Following fields are dirtied for each queued packet,
+ * keep them in same cache line if possible.
+ */
+	spinlock_t	lock;
+	unsigned int	queue_total;
+	unsigned int	id_sequence;		/* 'sequence' of pkt ids */
+	struct list_head queue_list;		/* packets in queue */
+};
+
+typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long);
+
+static int nfnl_queue_net_id __read_mostly;
+
+#define INSTANCE_BUCKETS	16
+struct nfnl_queue_net {
+	spinlock_t instances_lock;
+	struct hlist_head instance_table[INSTANCE_BUCKETS];
+};
+
+static struct nfnl_queue_net *nfnl_queue_pernet(struct net *net)
+{
+	return net_generic(net, nfnl_queue_net_id);
+}
+
+static inline u_int8_t instance_hashfn(u_int16_t queue_num)
+{
+	return ((queue_num >> 8) ^ queue_num) % INSTANCE_BUCKETS;
+}
+
+static struct nfqnl_instance *
+instance_lookup(struct nfnl_queue_net *q, u_int16_t queue_num)
+{
+	struct hlist_head *head;
+	struct nfqnl_instance *inst;
+
+	head = &q->instance_table[instance_hashfn(queue_num)];
+	hlist_for_each_entry_rcu(inst, head, hlist) {
+		if (inst->queue_num == queue_num)
+			return inst;
+	}
+	return NULL;
+}
+
+static struct nfqnl_instance *
+instance_create(struct nfnl_queue_net *q, u_int16_t queue_num, u32 portid)
+{
+	struct nfqnl_instance *inst;
+	unsigned int h;
+	int err;
+
+	spin_lock(&q->instances_lock);
+	if (instance_lookup(q, queue_num)) {
+		err = -EEXIST;
+		goto out_unlock;
+	}
+
+	inst = kzalloc(sizeof(*inst), GFP_ATOMIC);
+	if (!inst) {
+		err = -ENOMEM;
+		goto out_unlock;
+	}
+
+	inst->queue_num = queue_num;
+	inst->peer_portid = portid;
+	inst->queue_maxlen = NFQNL_QMAX_DEFAULT;
+	inst->copy_range = NFQNL_MAX_COPY_RANGE;
+	inst->copy_mode = NFQNL_COPY_NONE;
+	spin_lock_init(&inst->lock);
+	INIT_LIST_HEAD(&inst->queue_list);
+
+	if (!try_module_get(THIS_MODULE)) {
+		err = -EAGAIN;
+		goto out_free;
+	}
+
+	h = instance_hashfn(queue_num);
+	hlist_add_head_rcu(&inst->hlist, &q->instance_table[h]);
+
+	spin_unlock(&q->instances_lock);
+
+	return inst;
+
+out_free:
+	kfree(inst);
+out_unlock:
+	spin_unlock(&q->instances_lock);
+	return ERR_PTR(err);
+}
+
+static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn,
+			unsigned long data);
+
+static void
+instance_destroy_rcu(struct rcu_head *head)
+{
+	struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance,
+						   rcu);
+
+	nfqnl_flush(inst, NULL, 0);
+	kfree(inst);
+	module_put(THIS_MODULE);
+}
+
+static void
+__instance_destroy(struct nfqnl_instance *inst)
+{
+	hlist_del_rcu(&inst->hlist);
+	call_rcu(&inst->rcu, instance_destroy_rcu);
+}
+
+static void
+instance_destroy(struct nfnl_queue_net *q, struct nfqnl_instance *inst)
+{
+	spin_lock(&q->instances_lock);
+	__instance_destroy(inst);
+	spin_unlock(&q->instances_lock);
+}
+
+static inline void
+__enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry)
+{
+       list_add_tail(&entry->list, &queue->queue_list);
+       queue->queue_total++;
+}
+
+static void
+__dequeue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry)
+{
+	list_del(&entry->list);
+	queue->queue_total--;
+}
+
+static struct nf_queue_entry *
+find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id)
+{
+	struct nf_queue_entry *entry = NULL, *i;
+
+	spin_lock_bh(&queue->lock);
+
+	list_for_each_entry(i, &queue->queue_list, list) {
+		if (i->id == id) {
+			entry = i;
+			break;
+		}
+	}
+
+	if (entry)
+		__dequeue_entry(queue, entry);
+
+	spin_unlock_bh(&queue->lock);
+
+	return entry;
+}
+
+static void
+nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data)
+{
+	struct nf_queue_entry *entry, *next;
+
+	spin_lock_bh(&queue->lock);
+	list_for_each_entry_safe(entry, next, &queue->queue_list, list) {
+		if (!cmpfn || cmpfn(entry, data)) {
+			list_del(&entry->list);
+			queue->queue_total--;
+			nf_reinject(entry, NF_DROP);
+		}
+	}
+	spin_unlock_bh(&queue->lock);
+}
+
+static int
+nfqnl_put_packet_info(struct sk_buff *nlskb, struct sk_buff *packet,
+		      bool csum_verify)
+{
+	__u32 flags = 0;
+
+	if (packet->ip_summed == CHECKSUM_PARTIAL)
+		flags = NFQA_SKB_CSUMNOTREADY;
+	else if (csum_verify)
+		flags = NFQA_SKB_CSUM_NOTVERIFIED;
+
+	if (skb_is_gso(packet))
+		flags |= NFQA_SKB_GSO;
+
+	return flags ? nla_put_be32(nlskb, NFQA_SKB_INFO, htonl(flags)) : 0;
+}
+
+static int nfqnl_put_sk_uidgid(struct sk_buff *skb, struct sock *sk)
+{
+	const struct cred *cred;
+
+	if (!sk_fullsock(sk))
+		return 0;
+
+	read_lock_bh(&sk->sk_callback_lock);
+	if (sk->sk_socket && sk->sk_socket->file) {
+		cred = sk->sk_socket->file->f_cred;
+		if (nla_put_be32(skb, NFQA_UID,
+		    htonl(from_kuid_munged(&init_user_ns, cred->fsuid))))
+			goto nla_put_failure;
+		if (nla_put_be32(skb, NFQA_GID,
+		    htonl(from_kgid_munged(&init_user_ns, cred->fsgid))))
+			goto nla_put_failure;
+	}
+	read_unlock_bh(&sk->sk_callback_lock);
+	return 0;
+
+nla_put_failure:
+	read_unlock_bh(&sk->sk_callback_lock);
+	return -1;
+}
+
+static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata)
+{
+	u32 seclen = 0;
+#if IS_ENABLED(CONFIG_NETWORK_SECMARK)
+	if (!skb || !sk_fullsock(skb->sk))
+		return 0;
+
+	read_lock_bh(&skb->sk->sk_callback_lock);
+
+	if (skb->secmark)
+		security_secid_to_secctx(skb->secmark, secdata, &seclen);
+
+	read_unlock_bh(&skb->sk->sk_callback_lock);
+#endif
+	return seclen;
+}
+
+static struct sk_buff *
+nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
+			   struct nf_queue_entry *entry,
+			   __be32 **packet_id_ptr)
+{
+	size_t size;
+	size_t data_len = 0, cap_len = 0, rem_len = 0;
+	unsigned int hlen = 0;
+	struct sk_buff *skb;
+	struct nlattr *nla;
+	struct nfqnl_msg_packet_hdr *pmsg;
+	struct nlmsghdr *nlh;
+	struct nfgenmsg *nfmsg;
+	struct sk_buff *entskb = entry->skb;
+	struct net_device *indev;
+	struct net_device *outdev;
+	struct nf_conn *ct = NULL;
+	enum ip_conntrack_info uninitialized_var(ctinfo);
+	struct nfq_ct_hook *nfq_ct;
+	bool csum_verify;
+	char *secdata = NULL;
+	u32 seclen = 0;
+
+	size =    nlmsg_total_size(sizeof(struct nfgenmsg))
+		+ nla_total_size(sizeof(struct nfqnl_msg_packet_hdr))
+		+ nla_total_size(sizeof(u_int32_t))	/* ifindex */
+		+ nla_total_size(sizeof(u_int32_t))	/* ifindex */
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+		+ nla_total_size(sizeof(u_int32_t))	/* ifindex */
+		+ nla_total_size(sizeof(u_int32_t))	/* ifindex */
+#endif
+		+ nla_total_size(sizeof(u_int32_t))	/* mark */
+		+ nla_total_size(sizeof(struct nfqnl_msg_packet_hw))
+		+ nla_total_size(sizeof(u_int32_t))	/* skbinfo */
+		+ nla_total_size(sizeof(u_int32_t));	/* cap_len */
+
+	if (entskb->tstamp.tv64)
+		size += nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp));
+
+	if (entry->state.hook <= NF_INET_FORWARD ||
+	   (entry->state.hook == NF_INET_POST_ROUTING && entskb->sk == NULL))
+		csum_verify = !skb_csum_unnecessary(entskb);
+	else
+		csum_verify = false;
+
+	outdev = entry->state.out;
+
+	switch ((enum nfqnl_config_mode)ACCESS_ONCE(queue->copy_mode)) {
+	case NFQNL_COPY_META:
+	case NFQNL_COPY_NONE:
+		break;
+
+	case NFQNL_COPY_PACKET:
+		if (!(queue->flags & NFQA_CFG_F_GSO) &&
+		    entskb->ip_summed == CHECKSUM_PARTIAL &&
+		    skb_checksum_help(entskb))
+			return NULL;
+
+		data_len = ACCESS_ONCE(queue->copy_range);
+		if (data_len > entskb->len)
+			data_len = entskb->len;
+
+		hlen = skb_zerocopy_headlen(entskb);
+		hlen = min_t(unsigned int, hlen, data_len);
+		size += sizeof(struct nlattr) + hlen;
+		cap_len = entskb->len;
+		rem_len = data_len - hlen;
+		break;
+	}
+
+	if (queue->flags & NFQA_CFG_F_CONNTRACK) {
+		nfq_ct = rcu_dereference(nfq_ct_hook);
+		if (nfq_ct != NULL) {
+			ct = nfq_ct->get_ct(entskb, &ctinfo);
+			if (ct != NULL)
+				size += nfq_ct->build_size(ct);
+		}
+	}
+
+	if (queue->flags & NFQA_CFG_F_UID_GID) {
+		size +=  (nla_total_size(sizeof(u_int32_t))	/* uid */
+			+ nla_total_size(sizeof(u_int32_t)));	/* gid */
+	}
+
+	if ((queue->flags & NFQA_CFG_F_SECCTX) && entskb->sk) {
+		seclen = nfqnl_get_sk_secctx(entskb, &secdata);
+		if (seclen)
+			size += nla_total_size(seclen);
+	}
+
+	skb = __netlink_alloc_skb(net->nfnl, size, rem_len, queue->peer_portid,
+				  GFP_ATOMIC);
+	if (!skb) {
+		skb_tx_error(entskb);
+		return NULL;
+	}
+
+	nlh = nlmsg_put(skb, 0, 0,
+			NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET,
+			sizeof(struct nfgenmsg), 0);
+	if (!nlh) {
+		skb_tx_error(entskb);
+		kfree_skb(skb);
+		return NULL;
+	}
+	nfmsg = nlmsg_data(nlh);
+	nfmsg->nfgen_family = entry->state.pf;
+	nfmsg->version = NFNETLINK_V0;
+	nfmsg->res_id = htons(queue->queue_num);
+
+	nla = __nla_reserve(skb, NFQA_PACKET_HDR, sizeof(*pmsg));
+	pmsg = nla_data(nla);
+	pmsg->hw_protocol	= entskb->protocol;
+	pmsg->hook		= entry->state.hook;
+	*packet_id_ptr		= &pmsg->packet_id;
+
+	indev = entry->state.in;
+	if (indev) {
+#if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+		if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, htonl(indev->ifindex)))
+			goto nla_put_failure;
+#else
+		if (entry->state.pf == PF_BRIDGE) {
+			/* Case 1: indev is physical input device, we need to
+			 * look for bridge group (when called from
+			 * netfilter_bridge) */
+			if (nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV,
+					 htonl(indev->ifindex)) ||
+			/* this is the bridge group "brX" */
+			/* rcu_read_lock()ed by __nf_queue */
+			    nla_put_be32(skb, NFQA_IFINDEX_INDEV,
+					 htonl(br_port_get_rcu(indev)->br->dev->ifindex)))
+				goto nla_put_failure;
+		} else {
+			int physinif;
+
+			/* Case 2: indev is bridge group, we need to look for
+			 * physical device (when called from ipv4) */
+			if (nla_put_be32(skb, NFQA_IFINDEX_INDEV,
+					 htonl(indev->ifindex)))
+				goto nla_put_failure;
+
+			physinif = nf_bridge_get_physinif(entskb);
+			if (physinif &&
+			    nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV,
+					 htonl(physinif)))
+				goto nla_put_failure;
+		}
+#endif
+	}
+
+	if (outdev) {
+#if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+		if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, htonl(outdev->ifindex)))
+			goto nla_put_failure;
+#else
+		if (entry->state.pf == PF_BRIDGE) {
+			/* Case 1: outdev is physical output device, we need to
+			 * look for bridge group (when called from
+			 * netfilter_bridge) */
+			if (nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV,
+					 htonl(outdev->ifindex)) ||
+			/* this is the bridge group "brX" */
+			/* rcu_read_lock()ed by __nf_queue */
+			    nla_put_be32(skb, NFQA_IFINDEX_OUTDEV,
+					 htonl(br_port_get_rcu(outdev)->br->dev->ifindex)))
+				goto nla_put_failure;
+		} else {
+			int physoutif;
+
+			/* Case 2: outdev is bridge group, we need to look for
+			 * physical output device (when called from ipv4) */
+			if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV,
+					 htonl(outdev->ifindex)))
+				goto nla_put_failure;
+
+			physoutif = nf_bridge_get_physoutif(entskb);
+			if (physoutif &&
+			    nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV,
+					 htonl(physoutif)))
+				goto nla_put_failure;
+		}
+#endif
+	}
+
+	if (entskb->mark &&
+	    nla_put_be32(skb, NFQA_MARK, htonl(entskb->mark)))
+		goto nla_put_failure;
+
+	if (indev && entskb->dev &&
+	    entskb->mac_header != entskb->network_header) {
+		struct nfqnl_msg_packet_hw phw;
+		int len;
+
+		memset(&phw, 0, sizeof(phw));
+		len = dev_parse_header(entskb, phw.hw_addr);
+		if (len) {
+			phw.hw_addrlen = htons(len);
+			if (nla_put(skb, NFQA_HWADDR, sizeof(phw), &phw))
+				goto nla_put_failure;
+		}
+	}
+
+	if (entskb->tstamp.tv64) {
+		struct nfqnl_msg_packet_timestamp ts;
+		struct timeval tv = ktime_to_timeval(entskb->tstamp);
+		ts.sec = cpu_to_be64(tv.tv_sec);
+		ts.usec = cpu_to_be64(tv.tv_usec);
+
+		if (nla_put(skb, NFQA_TIMESTAMP, sizeof(ts), &ts))
+			goto nla_put_failure;
+	}
+
+	if ((queue->flags & NFQA_CFG_F_UID_GID) && entskb->sk &&
+	    nfqnl_put_sk_uidgid(skb, entskb->sk) < 0)
+		goto nla_put_failure;
+
+	if (seclen && nla_put(skb, NFQA_SECCTX, seclen, secdata))
+		goto nla_put_failure;
+
+	if (ct && nfq_ct->build(skb, ct, ctinfo, NFQA_CT, NFQA_CT_INFO) < 0)
+		goto nla_put_failure;
+
+	if (cap_len > data_len &&
+	    nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len)))
+		goto nla_put_failure;
+
+	if (nfqnl_put_packet_info(skb, entskb, csum_verify))
+		goto nla_put_failure;
+
+	if (data_len) {
+		struct nlattr *nla;
+
+		if (skb_tailroom(skb) < sizeof(*nla) + hlen)
+			goto nla_put_failure;
+
+		nla = (struct nlattr *)skb_put(skb, sizeof(*nla));
+		nla->nla_type = NFQA_PAYLOAD;
+		nla->nla_len = nla_attr_size(data_len);
+
+		if (skb_zerocopy(skb, entskb, data_len, hlen))
+			goto nla_put_failure;
+	}
+
+	nlh->nlmsg_len = skb->len;
+	return skb;
+
+nla_put_failure:
+	skb_tx_error(entskb);
+	kfree_skb(skb);
+	net_err_ratelimited("nf_queue: error creating packet message\n");
+	return NULL;
+}
+
+static int
+__nfqnl_enqueue_packet(struct net *net, struct nfqnl_instance *queue,
+			struct nf_queue_entry *entry)
+{
+	struct sk_buff *nskb;
+	int err = -ENOBUFS;
+	__be32 *packet_id_ptr;
+	int failopen = 0;
+
+	nskb = nfqnl_build_packet_message(net, queue, entry, &packet_id_ptr);
+	if (nskb == NULL) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+	spin_lock_bh(&queue->lock);
+
+	if (queue->queue_total >= queue->queue_maxlen) {
+		if (queue->flags & NFQA_CFG_F_FAIL_OPEN) {
+			failopen = 1;
+			err = 0;
+		} else {
+			queue->queue_dropped++;
+			net_warn_ratelimited("nf_queue: full at %d entries, dropping packets(s)\n",
+					     queue->queue_total);
+		}
+		goto err_out_free_nskb;
+	}
+	entry->id = ++queue->id_sequence;
+	*packet_id_ptr = htonl(entry->id);
+
+	/* nfnetlink_unicast will either free the nskb or add it to a socket */
+	err = nfnetlink_unicast(nskb, net, queue->peer_portid, MSG_DONTWAIT);
+	if (err < 0) {
+		queue->queue_user_dropped++;
+		goto err_out_unlock;
+	}
+
+	__enqueue_entry(queue, entry);
+
+	spin_unlock_bh(&queue->lock);
+	return 0;
+
+err_out_free_nskb:
+	kfree_skb(nskb);
+err_out_unlock:
+	spin_unlock_bh(&queue->lock);
+	if (failopen)
+		nf_reinject(entry, NF_ACCEPT);
+err_out:
+	return err;
+}
+
+static struct nf_queue_entry *
+nf_queue_entry_dup(struct nf_queue_entry *e)
+{
+	struct nf_queue_entry *entry = kmemdup(e, e->size, GFP_ATOMIC);
+	if (entry) {
+		if (nf_queue_entry_get_refs(entry))
+			return entry;
+		kfree(entry);
+	}
+	return NULL;
+}
+
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+/* When called from bridge netfilter, skb->data must point to MAC header
+ * before calling skb_gso_segment(). Else, original MAC header is lost
+ * and segmented skbs will be sent to wrong destination.
+ */
+static void nf_bridge_adjust_skb_data(struct sk_buff *skb)
+{
+	if (skb->nf_bridge)
+		__skb_push(skb, skb->network_header - skb->mac_header);
+}
+
+static void nf_bridge_adjust_segmented_data(struct sk_buff *skb)
+{
+	if (skb->nf_bridge)
+		__skb_pull(skb, skb->network_header - skb->mac_header);
+}
+#else
+#define nf_bridge_adjust_skb_data(s) do {} while (0)
+#define nf_bridge_adjust_segmented_data(s) do {} while (0)
+#endif
+
+static void free_entry(struct nf_queue_entry *entry)
+{
+	nf_queue_entry_release_refs(entry);
+	kfree(entry);
+}
+
+static int
+__nfqnl_enqueue_packet_gso(struct net *net, struct nfqnl_instance *queue,
+			   struct sk_buff *skb, struct nf_queue_entry *entry)
+{
+	int ret = -ENOMEM;
+	struct nf_queue_entry *entry_seg;
+
+	nf_bridge_adjust_segmented_data(skb);
+
+	if (skb->next == NULL) { /* last packet, no need to copy entry */
+		struct sk_buff *gso_skb = entry->skb;
+		entry->skb = skb;
+		ret = __nfqnl_enqueue_packet(net, queue, entry);
+		if (ret)
+			entry->skb = gso_skb;
+		return ret;
+	}
+
+	skb->next = NULL;
+
+	entry_seg = nf_queue_entry_dup(entry);
+	if (entry_seg) {
+		entry_seg->skb = skb;
+		ret = __nfqnl_enqueue_packet(net, queue, entry_seg);
+		if (ret)
+			free_entry(entry_seg);
+	}
+	return ret;
+}
+
+static int
+nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
+{
+	unsigned int queued;
+	struct nfqnl_instance *queue;
+	struct sk_buff *skb, *segs;
+	int err = -ENOBUFS;
+	struct net *net = entry->state.net;
+	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
+
+	/* rcu_read_lock()ed by nf_hook_slow() */
+	queue = instance_lookup(q, queuenum);
+	if (!queue)
+		return -ESRCH;
+
+	if (queue->copy_mode == NFQNL_COPY_NONE)
+		return -EINVAL;
+
+	skb = entry->skb;
+
+	switch (entry->state.pf) {
+	case NFPROTO_IPV4:
+		skb->protocol = htons(ETH_P_IP);
+		break;
+	case NFPROTO_IPV6:
+		skb->protocol = htons(ETH_P_IPV6);
+		break;
+	}
+
+	if ((queue->flags & NFQA_CFG_F_GSO) || !skb_is_gso(skb))
+		return __nfqnl_enqueue_packet(net, queue, entry);
+
+	nf_bridge_adjust_skb_data(skb);
+	segs = skb_gso_segment(skb, 0);
+	/* Does not use PTR_ERR to limit the number of error codes that can be
+	 * returned by nf_queue.  For instance, callers rely on -ECANCELED to
+	 * mean 'ignore this hook'.
+	 */
+	if (IS_ERR_OR_NULL(segs))
+		goto out_err;
+	queued = 0;
+	err = 0;
+	do {
+		struct sk_buff *nskb = segs->next;
+		if (err == 0)
+			err = __nfqnl_enqueue_packet_gso(net, queue,
+							segs, entry);
+		if (err == 0)
+			queued++;
+		else
+			kfree_skb(segs);
+		segs = nskb;
+	} while (segs);
+
+	if (queued) {
+		if (err) /* some segments are already queued */
+			free_entry(entry);
+		kfree_skb(skb);
+		return 0;
+	}
+ out_err:
+	nf_bridge_adjust_segmented_data(skb);
+	return err;
+}
+
+static int
+nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e, int diff)
+{
+	struct sk_buff *nskb;
+
+	if (diff < 0) {
+		if (pskb_trim(e->skb, data_len))
+			return -ENOMEM;
+	} else if (diff > 0) {
+		if (data_len > 0xFFFF)
+			return -EINVAL;
+		if (diff > skb_tailroom(e->skb)) {
+			nskb = skb_copy_expand(e->skb, skb_headroom(e->skb),
+					       diff, GFP_ATOMIC);
+			if (!nskb) {
+				printk(KERN_WARNING "nf_queue: OOM "
+				      "in mangle, dropping packet\n");
+				return -ENOMEM;
+			}
+			kfree_skb(e->skb);
+			e->skb = nskb;
+		}
+		skb_put(e->skb, diff);
+	}
+	if (!skb_make_writable(e->skb, data_len))
+		return -ENOMEM;
+	skb_copy_to_linear_data(e->skb, data, data_len);
+	e->skb->ip_summed = CHECKSUM_NONE;
+	return 0;
+}
+
+static int
+nfqnl_set_mode(struct nfqnl_instance *queue,
+	       unsigned char mode, unsigned int range)
+{
+	int status = 0;
+
+	spin_lock_bh(&queue->lock);
+	switch (mode) {
+	case NFQNL_COPY_NONE:
+	case NFQNL_COPY_META:
+		queue->copy_mode = mode;
+		queue->copy_range = 0;
+		break;
+
+	case NFQNL_COPY_PACKET:
+		queue->copy_mode = mode;
+		if (range == 0 || range > NFQNL_MAX_COPY_RANGE)
+			queue->copy_range = NFQNL_MAX_COPY_RANGE;
+		else
+			queue->copy_range = range;
+		break;
+
+	default:
+		status = -EINVAL;
+
+	}
+	spin_unlock_bh(&queue->lock);
+
+	return status;
+}
+
+static int
+dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex)
+{
+	if (entry->state.in)
+		if (entry->state.in->ifindex == ifindex)
+			return 1;
+	if (entry->state.out)
+		if (entry->state.out->ifindex == ifindex)
+			return 1;
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+	if (entry->skb->nf_bridge) {
+		int physinif, physoutif;
+
+		physinif = nf_bridge_get_physinif(entry->skb);
+		physoutif = nf_bridge_get_physoutif(entry->skb);
+
+		if (physinif == ifindex || physoutif == ifindex)
+			return 1;
+	}
+#endif
+	return 0;
+}
+
+/* drop all packets with either indev or outdev == ifindex from all queue
+ * instances */
+static void
+nfqnl_dev_drop(struct net *net, int ifindex)
+{
+	int i;
+	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
+
+	rcu_read_lock();
+
+	for (i = 0; i < INSTANCE_BUCKETS; i++) {
+		struct nfqnl_instance *inst;
+		struct hlist_head *head = &q->instance_table[i];
+
+		hlist_for_each_entry_rcu(inst, head, hlist)
+			nfqnl_flush(inst, dev_cmp, ifindex);
+	}
+
+	rcu_read_unlock();
+}
+
+static int
+nfqnl_rcv_dev_event(struct notifier_block *this,
+		    unsigned long event, void *ptr)
+{
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+
+	/* Drop any packets associated with the downed device */
+	if (event == NETDEV_DOWN)
+		nfqnl_dev_drop(dev_net(dev), dev->ifindex);
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block nfqnl_dev_notifier = {
+	.notifier_call	= nfqnl_rcv_dev_event,
+};
+
+static int nf_hook_cmp(struct nf_queue_entry *entry, unsigned long ops_ptr)
+{
+	return entry->elem == (struct nf_hook_ops *)ops_ptr;
+}
+
+static void nfqnl_nf_hook_drop(struct net *net, struct nf_hook_ops *hook)
+{
+	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
+	int i;
+
+	rcu_read_lock();
+	for (i = 0; i < INSTANCE_BUCKETS; i++) {
+		struct nfqnl_instance *inst;
+		struct hlist_head *head = &q->instance_table[i];
+
+		hlist_for_each_entry_rcu(inst, head, hlist)
+			nfqnl_flush(inst, nf_hook_cmp, (unsigned long)hook);
+	}
+	rcu_read_unlock();
+}
+
+static int
+nfqnl_rcv_nl_event(struct notifier_block *this,
+		   unsigned long event, void *ptr)
+{
+	struct netlink_notify *n = ptr;
+	struct nfnl_queue_net *q = nfnl_queue_pernet(n->net);
+
+	if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) {
+		int i;
+
+		/* destroy all instances for this portid */
+		spin_lock(&q->instances_lock);
+		for (i = 0; i < INSTANCE_BUCKETS; i++) {
+			struct hlist_node *t2;
+			struct nfqnl_instance *inst;
+			struct hlist_head *head = &q->instance_table[i];
+
+			hlist_for_each_entry_safe(inst, t2, head, hlist) {
+				if (n->portid == inst->peer_portid)
+					__instance_destroy(inst);
+			}
+		}
+		spin_unlock(&q->instances_lock);
+	}
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block nfqnl_rtnl_notifier = {
+	.notifier_call	= nfqnl_rcv_nl_event,
+};
+
+static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = {
+	[NFQA_VERDICT_HDR]	= { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
+	[NFQA_MARK]		= { .type = NLA_U32 },
+	[NFQA_PAYLOAD]		= { .type = NLA_UNSPEC },
+	[NFQA_CT]		= { .type = NLA_UNSPEC },
+	[NFQA_EXP]		= { .type = NLA_UNSPEC },
+};
+
+static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = {
+	[NFQA_VERDICT_HDR]	= { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
+	[NFQA_MARK]		= { .type = NLA_U32 },
+};
+
+static struct nfqnl_instance *
+verdict_instance_lookup(struct nfnl_queue_net *q, u16 queue_num, u32 nlportid)
+{
+	struct nfqnl_instance *queue;
+
+	queue = instance_lookup(q, queue_num);
+	if (!queue)
+		return ERR_PTR(-ENODEV);
+
+	if (queue->peer_portid != nlportid)
+		return ERR_PTR(-EPERM);
+
+	return queue;
+}
+
+static struct nfqnl_msg_verdict_hdr*
+verdicthdr_get(const struct nlattr * const nfqa[])
+{
+	struct nfqnl_msg_verdict_hdr *vhdr;
+	unsigned int verdict;
+
+	if (!nfqa[NFQA_VERDICT_HDR])
+		return NULL;
+
+	vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]);
+	verdict = ntohl(vhdr->verdict) & NF_VERDICT_MASK;
+	if (verdict > NF_MAX_VERDICT || verdict == NF_STOLEN)
+		return NULL;
+	return vhdr;
+}
+
+static int nfq_id_after(unsigned int id, unsigned int max)
+{
+	return (int)(id - max) > 0;
+}
+
+static int
+nfqnl_recv_verdict_batch(struct sock *ctnl, struct sk_buff *skb,
+		   const struct nlmsghdr *nlh,
+		   const struct nlattr * const nfqa[])
+{
+	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
+	struct nf_queue_entry *entry, *tmp;
+	unsigned int verdict, maxid;
+	struct nfqnl_msg_verdict_hdr *vhdr;
+	struct nfqnl_instance *queue;
+	LIST_HEAD(batch_list);
+	u16 queue_num = ntohs(nfmsg->res_id);
+
+	struct net *net = sock_net(ctnl);
+	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
+
+	queue = verdict_instance_lookup(q, queue_num,
+					NETLINK_CB(skb).portid);
+	if (IS_ERR(queue))
+		return PTR_ERR(queue);
+
+	vhdr = verdicthdr_get(nfqa);
+	if (!vhdr)
+		return -EINVAL;
+
+	verdict = ntohl(vhdr->verdict);
+	maxid = ntohl(vhdr->id);
+
+	spin_lock_bh(&queue->lock);
+
+	list_for_each_entry_safe(entry, tmp, &queue->queue_list, list) {
+		if (nfq_id_after(entry->id, maxid))
+			break;
+		__dequeue_entry(queue, entry);
+		list_add_tail(&entry->list, &batch_list);
+	}
+
+	spin_unlock_bh(&queue->lock);
+
+	if (list_empty(&batch_list))
+		return -ENOENT;
+
+	list_for_each_entry_safe(entry, tmp, &batch_list, list) {
+		if (nfqa[NFQA_MARK])
+			entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
+		nf_reinject(entry, verdict);
+	}
+	return 0;
+}
+
+static struct nf_conn *nfqnl_ct_parse(struct nfq_ct_hook *nfq_ct,
+				      const struct nlmsghdr *nlh,
+				      const struct nlattr * const nfqa[],
+				      struct nf_queue_entry *entry,
+				      enum ip_conntrack_info *ctinfo)
+{
+	struct nf_conn *ct;
+
+	ct = nfq_ct->get_ct(entry->skb, ctinfo);
+	if (ct == NULL)
+		return NULL;
+
+	if (nfq_ct->parse(nfqa[NFQA_CT], ct) < 0)
+		return NULL;
+
+	if (nfqa[NFQA_EXP])
+		nfq_ct->attach_expect(nfqa[NFQA_EXP], ct,
+				      NETLINK_CB(entry->skb).portid,
+				      nlmsg_report(nlh));
+	return ct;
+}
+
+static int
+nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
+		   const struct nlmsghdr *nlh,
+		   const struct nlattr * const nfqa[])
+{
+	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
+	u_int16_t queue_num = ntohs(nfmsg->res_id);
+
+	struct nfqnl_msg_verdict_hdr *vhdr;
+	struct nfqnl_instance *queue;
+	unsigned int verdict;
+	struct nf_queue_entry *entry;
+	enum ip_conntrack_info uninitialized_var(ctinfo);
+	struct nfq_ct_hook *nfq_ct;
+	struct nf_conn *ct = NULL;
+
+	struct net *net = sock_net(ctnl);
+	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
+
+	queue = instance_lookup(q, queue_num);
+	if (!queue)
+		queue = verdict_instance_lookup(q, queue_num,
+						NETLINK_CB(skb).portid);
+	if (IS_ERR(queue))
+		return PTR_ERR(queue);
+
+	vhdr = verdicthdr_get(nfqa);
+	if (!vhdr)
+		return -EINVAL;
+
+	verdict = ntohl(vhdr->verdict);
+
+	entry = find_dequeue_entry(queue, ntohl(vhdr->id));
+	if (entry == NULL)
+		return -ENOENT;
+
+	if (nfqa[NFQA_CT]) {
+		/* rcu lock already held from nfnl->call_rcu. */
+		nfq_ct = rcu_dereference(nfq_ct_hook);
+		if (nfq_ct != NULL)
+			ct = nfqnl_ct_parse(nfq_ct, nlh, nfqa, entry, &ctinfo);
+	}
+
+	if (nfqa[NFQA_PAYLOAD]) {
+		u16 payload_len = nla_len(nfqa[NFQA_PAYLOAD]);
+		int diff = payload_len - entry->skb->len;
+
+		if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]),
+				 payload_len, entry, diff) < 0)
+			verdict = NF_DROP;
+
+		if (ct && diff)
+			nfq_ct->seq_adjust(entry->skb, ct, ctinfo, diff);
+	}
+
+	if (nfqa[NFQA_MARK])
+		entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
+
+	nf_reinject(entry, verdict);
+	return 0;
+}
+
+static int
+nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
+		  const struct nlmsghdr *nlh,
+		  const struct nlattr * const nfqa[])
+{
+	return -ENOTSUPP;
+}
+
+static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = {
+	[NFQA_CFG_CMD]		= { .len = sizeof(struct nfqnl_msg_config_cmd) },
+	[NFQA_CFG_PARAMS]	= { .len = sizeof(struct nfqnl_msg_config_params) },
+};
+
+static const struct nf_queue_handler nfqh = {
+	.outfn		= &nfqnl_enqueue_packet,
+	.nf_hook_drop	= &nfqnl_nf_hook_drop,
+};
+
+static int
+nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
+		  const struct nlmsghdr *nlh,
+		  const struct nlattr * const nfqa[])
+{
+	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
+	u_int16_t queue_num = ntohs(nfmsg->res_id);
+	struct nfqnl_instance *queue;
+	struct nfqnl_msg_config_cmd *cmd = NULL;
+	struct net *net = sock_net(ctnl);
+	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
+	int ret = 0;
+
+	if (nfqa[NFQA_CFG_CMD]) {
+		cmd = nla_data(nfqa[NFQA_CFG_CMD]);
+
+		/* Obsolete commands without queue context */
+		switch (cmd->command) {
+		case NFQNL_CFG_CMD_PF_BIND: return 0;
+		case NFQNL_CFG_CMD_PF_UNBIND: return 0;
+		}
+	}
+
+	rcu_read_lock();
+	queue = instance_lookup(q, queue_num);
+	if (queue && queue->peer_portid != NETLINK_CB(skb).portid) {
+		ret = -EPERM;
+		goto err_out_unlock;
+	}
+
+	if (cmd != NULL) {
+		switch (cmd->command) {
+		case NFQNL_CFG_CMD_BIND:
+			if (queue) {
+				ret = -EBUSY;
+				goto err_out_unlock;
+			}
+			queue = instance_create(q, queue_num,
+						NETLINK_CB(skb).portid);
+			if (IS_ERR(queue)) {
+				ret = PTR_ERR(queue);
+				goto err_out_unlock;
+			}
+			break;
+		case NFQNL_CFG_CMD_UNBIND:
+			if (!queue) {
+				ret = -ENODEV;
+				goto err_out_unlock;
+			}
+			instance_destroy(q, queue);
+			break;
+		case NFQNL_CFG_CMD_PF_BIND:
+		case NFQNL_CFG_CMD_PF_UNBIND:
+			break;
+		default:
+			ret = -ENOTSUPP;
+			break;
+		}
+	}
+
+	if (nfqa[NFQA_CFG_PARAMS]) {
+		struct nfqnl_msg_config_params *params;
+
+		if (!queue) {
+			ret = -ENODEV;
+			goto err_out_unlock;
+		}
+		params = nla_data(nfqa[NFQA_CFG_PARAMS]);
+		nfqnl_set_mode(queue, params->copy_mode,
+				ntohl(params->copy_range));
+	}
+
+	if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) {
+		__be32 *queue_maxlen;
+
+		if (!queue) {
+			ret = -ENODEV;
+			goto err_out_unlock;
+		}
+		queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]);
+		spin_lock_bh(&queue->lock);
+		queue->queue_maxlen = ntohl(*queue_maxlen);
+		spin_unlock_bh(&queue->lock);
+	}
+
+	if (nfqa[NFQA_CFG_FLAGS]) {
+		__u32 flags, mask;
+
+		if (!queue) {
+			ret = -ENODEV;
+			goto err_out_unlock;
+		}
+
+		if (!nfqa[NFQA_CFG_MASK]) {
+			/* A mask is needed to specify which flags are being
+			 * changed.
+			 */
+			ret = -EINVAL;
+			goto err_out_unlock;
+		}
+
+		flags = ntohl(nla_get_be32(nfqa[NFQA_CFG_FLAGS]));
+		mask = ntohl(nla_get_be32(nfqa[NFQA_CFG_MASK]));
+
+		if (flags >= NFQA_CFG_F_MAX) {
+			ret = -EOPNOTSUPP;
+			goto err_out_unlock;
+		}
+#if !IS_ENABLED(CONFIG_NETWORK_SECMARK)
+		if (flags & mask & NFQA_CFG_F_SECCTX) {
+			ret = -EOPNOTSUPP;
+			goto err_out_unlock;
+		}
+#endif
+		spin_lock_bh(&queue->lock);
+		queue->flags &= ~mask;
+		queue->flags |= flags & mask;
+		spin_unlock_bh(&queue->lock);
+	}
+
+err_out_unlock:
+	rcu_read_unlock();
+	return ret;
+}
+
+static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = {
+	[NFQNL_MSG_PACKET]	= { .call_rcu = nfqnl_recv_unsupp,
+				    .attr_count = NFQA_MAX, },
+	[NFQNL_MSG_VERDICT]	= { .call_rcu = nfqnl_recv_verdict,
+				    .attr_count = NFQA_MAX,
+				    .policy = nfqa_verdict_policy },
+	[NFQNL_MSG_CONFIG]	= { .call = nfqnl_recv_config,
+				    .attr_count = NFQA_CFG_MAX,
+				    .policy = nfqa_cfg_policy },
+	[NFQNL_MSG_VERDICT_BATCH]={ .call_rcu = nfqnl_recv_verdict_batch,
+				    .attr_count = NFQA_MAX,
+				    .policy = nfqa_verdict_batch_policy },
+};
+
+static const struct nfnetlink_subsystem nfqnl_subsys = {
+	.name		= "nf_queue",
+	.subsys_id	= NFNL_SUBSYS_QUEUE,
+	.cb_count	= NFQNL_MSG_MAX,
+	.cb		= nfqnl_cb,
+};
+
+#ifdef CONFIG_PROC_FS
+struct iter_state {
+	struct seq_net_private p;
+	unsigned int bucket;
+};
+
+static struct hlist_node *get_first(struct seq_file *seq)
+{
+	struct iter_state *st = seq->private;
+	struct net *net;
+	struct nfnl_queue_net *q;
+
+	if (!st)
+		return NULL;
+
+	net = seq_file_net(seq);
+	q = nfnl_queue_pernet(net);
+	for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) {
+		if (!hlist_empty(&q->instance_table[st->bucket]))
+			return q->instance_table[st->bucket].first;
+	}
+	return NULL;
+}
+
+static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h)
+{
+	struct iter_state *st = seq->private;
+	struct net *net = seq_file_net(seq);
+
+	h = h->next;
+	while (!h) {
+		struct nfnl_queue_net *q;
+
+		if (++st->bucket >= INSTANCE_BUCKETS)
+			return NULL;
+
+		q = nfnl_queue_pernet(net);
+		h = q->instance_table[st->bucket].first;
+	}
+	return h;
+}
+
+static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos)
+{
+	struct hlist_node *head;
+	head = get_first(seq);
+
+	if (head)
+		while (pos && (head = get_next(seq, head)))
+			pos--;
+	return pos ? NULL : head;
+}
+
+static void *seq_start(struct seq_file *s, loff_t *pos)
+	__acquires(nfnl_queue_pernet(seq_file_net(s))->instances_lock)
+{
+	spin_lock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock);
+	return get_idx(s, *pos);
+}
+
+static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+	(*pos)++;
+	return get_next(s, v);
+}
+
+static void seq_stop(struct seq_file *s, void *v)
+	__releases(nfnl_queue_pernet(seq_file_net(s))->instances_lock)
+{
+	spin_unlock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock);
+}
+
+static int seq_show(struct seq_file *s, void *v)
+{
+	const struct nfqnl_instance *inst = v;
+
+	seq_printf(s, "%5u %6u %5u %1u %5u %5u %5u %8u %2d\n",
+		   inst->queue_num,
+		   inst->peer_portid, inst->queue_total,
+		   inst->copy_mode, inst->copy_range,
+		   inst->queue_dropped, inst->queue_user_dropped,
+		   inst->id_sequence, 1);
+	return 0;
+}
+
+static const struct seq_operations nfqnl_seq_ops = {
+	.start	= seq_start,
+	.next	= seq_next,
+	.stop	= seq_stop,
+	.show	= seq_show,
+};
+
+static int nfqnl_open(struct inode *inode, struct file *file)
+{
+	return seq_open_net(inode, file, &nfqnl_seq_ops,
+			sizeof(struct iter_state));
+}
+
+static const struct file_operations nfqnl_file_ops = {
+	.owner	 = THIS_MODULE,
+	.open	 = nfqnl_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release_net,
+};
+
+#endif /* PROC_FS */
+
+static int __net_init nfnl_queue_net_init(struct net *net)
+{
+	unsigned int i;
+	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
+
+	for (i = 0; i < INSTANCE_BUCKETS; i++)
+		INIT_HLIST_HEAD(&q->instance_table[i]);
+
+	spin_lock_init(&q->instances_lock);
+
+#ifdef CONFIG_PROC_FS
+	if (!proc_create("nfnetlink_queue", 0440,
+			 net->nf.proc_netfilter, &nfqnl_file_ops))
+		return -ENOMEM;
+#endif
+	return 0;
+}
+
+static void __net_exit nfnl_queue_net_exit(struct net *net)
+{
+#ifdef CONFIG_PROC_FS
+	remove_proc_entry("nfnetlink_queue", net->nf.proc_netfilter);
+#endif
+}
+
+static struct pernet_operations nfnl_queue_net_ops = {
+	.init	= nfnl_queue_net_init,
+	.exit	= nfnl_queue_net_exit,
+	.id	= &nfnl_queue_net_id,
+	.size	= sizeof(struct nfnl_queue_net),
+};
+
+static int __init nfnetlink_queue_init(void)
+{
+	int status;
+
+	status = register_pernet_subsys(&nfnl_queue_net_ops);
+	if (status < 0) {
+		pr_err("nf_queue: failed to register pernet ops\n");
+		goto out;
+	}
+
+	netlink_register_notifier(&nfqnl_rtnl_notifier);
+	status = nfnetlink_subsys_register(&nfqnl_subsys);
+	if (status < 0) {
+		pr_err("nf_queue: failed to create netlink socket\n");
+		goto cleanup_netlink_notifier;
+	}
+
+	register_netdevice_notifier(&nfqnl_dev_notifier);
+	nf_register_queue_handler(&nfqh);
+	return status;
+
+cleanup_netlink_notifier:
+	netlink_unregister_notifier(&nfqnl_rtnl_notifier);
+out:
+	return status;
+}
+
+static void __exit nfnetlink_queue_fini(void)
+{
+	nf_unregister_queue_handler();
+	unregister_netdevice_notifier(&nfqnl_dev_notifier);
+	nfnetlink_subsys_unregister(&nfqnl_subsys);
+	netlink_unregister_notifier(&nfqnl_rtnl_notifier);
+	unregister_pernet_subsys(&nfnl_queue_net_ops);
+
+	rcu_barrier(); /* Wait for completion of call_rcu()'s */
+}
+
+MODULE_DESCRIPTION("netfilter packet queue handler");
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE);
+
+module_init(nfnetlink_queue_init);
+module_exit(nfnetlink_queue_fini);
diff --git a/net/netfilter/nfnetlink_queue_core.c b/net/netfilter/nfnetlink_queue_core.c
deleted file mode 100644
index b1f1c74..0000000
--- a/net/netfilter/nfnetlink_queue_core.c
+++ /dev/null
@@ -1,1443 +0,0 @@ 
-/*
- * This is a module which is used for queueing packets and communicating with
- * userspace via nfnetlink.
- *
- * (C) 2005 by Harald Welte <laforge@netfilter.org>
- * (C) 2007 by Patrick McHardy <kaber@trash.net>
- *
- * Based on the old ipv4-only ip_queue.c:
- * (C) 2000-2002 James Morris <jmorris@intercode.com.au>
- * (C) 2003-2005 Netfilter Core Team <coreteam@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/init.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/notifier.h>
-#include <linux/netdevice.h>
-#include <linux/netfilter.h>
-#include <linux/proc_fs.h>
-#include <linux/netfilter_ipv4.h>
-#include <linux/netfilter_ipv6.h>
-#include <linux/netfilter_bridge.h>
-#include <linux/netfilter/nfnetlink.h>
-#include <linux/netfilter/nfnetlink_queue.h>
-#include <linux/netfilter/nf_conntrack_common.h>
-#include <linux/list.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <net/netfilter/nf_queue.h>
-#include <net/netns/generic.h>
-
-#include <linux/atomic.h>
-
-#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
-#include "../bridge/br_private.h"
-#endif
-
-#define NFQNL_QMAX_DEFAULT 1024
-
-/* We're using struct nlattr which has 16bit nla_len. Note that nla_len
- * includes the header length. Thus, the maximum packet length that we
- * support is 65531 bytes. We send truncated packets if the specified length
- * is larger than that.  Userspace can check for presence of NFQA_CAP_LEN
- * attribute to detect truncation.
- */
-#define NFQNL_MAX_COPY_RANGE (0xffff - NLA_HDRLEN)
-
-struct nfqnl_instance {
-	struct hlist_node hlist;		/* global list of queues */
-	struct rcu_head rcu;
-
-	u32 peer_portid;
-	unsigned int queue_maxlen;
-	unsigned int copy_range;
-	unsigned int queue_dropped;
-	unsigned int queue_user_dropped;
-
-
-	u_int16_t queue_num;			/* number of this queue */
-	u_int8_t copy_mode;
-	u_int32_t flags;			/* Set using NFQA_CFG_FLAGS */
-/*
- * Following fields are dirtied for each queued packet,
- * keep them in same cache line if possible.
- */
-	spinlock_t	lock;
-	unsigned int	queue_total;
-	unsigned int	id_sequence;		/* 'sequence' of pkt ids */
-	struct list_head queue_list;		/* packets in queue */
-};
-
-typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long);
-
-static int nfnl_queue_net_id __read_mostly;
-
-#define INSTANCE_BUCKETS	16
-struct nfnl_queue_net {
-	spinlock_t instances_lock;
-	struct hlist_head instance_table[INSTANCE_BUCKETS];
-};
-
-static struct nfnl_queue_net *nfnl_queue_pernet(struct net *net)
-{
-	return net_generic(net, nfnl_queue_net_id);
-}
-
-static inline u_int8_t instance_hashfn(u_int16_t queue_num)
-{
-	return ((queue_num >> 8) ^ queue_num) % INSTANCE_BUCKETS;
-}
-
-static struct nfqnl_instance *
-instance_lookup(struct nfnl_queue_net *q, u_int16_t queue_num)
-{
-	struct hlist_head *head;
-	struct nfqnl_instance *inst;
-
-	head = &q->instance_table[instance_hashfn(queue_num)];
-	hlist_for_each_entry_rcu(inst, head, hlist) {
-		if (inst->queue_num == queue_num)
-			return inst;
-	}
-	return NULL;
-}
-
-static struct nfqnl_instance *
-instance_create(struct nfnl_queue_net *q, u_int16_t queue_num, u32 portid)
-{
-	struct nfqnl_instance *inst;
-	unsigned int h;
-	int err;
-
-	spin_lock(&q->instances_lock);
-	if (instance_lookup(q, queue_num)) {
-		err = -EEXIST;
-		goto out_unlock;
-	}
-
-	inst = kzalloc(sizeof(*inst), GFP_ATOMIC);
-	if (!inst) {
-		err = -ENOMEM;
-		goto out_unlock;
-	}
-
-	inst->queue_num = queue_num;
-	inst->peer_portid = portid;
-	inst->queue_maxlen = NFQNL_QMAX_DEFAULT;
-	inst->copy_range = NFQNL_MAX_COPY_RANGE;
-	inst->copy_mode = NFQNL_COPY_NONE;
-	spin_lock_init(&inst->lock);
-	INIT_LIST_HEAD(&inst->queue_list);
-
-	if (!try_module_get(THIS_MODULE)) {
-		err = -EAGAIN;
-		goto out_free;
-	}
-
-	h = instance_hashfn(queue_num);
-	hlist_add_head_rcu(&inst->hlist, &q->instance_table[h]);
-
-	spin_unlock(&q->instances_lock);
-
-	return inst;
-
-out_free:
-	kfree(inst);
-out_unlock:
-	spin_unlock(&q->instances_lock);
-	return ERR_PTR(err);
-}
-
-static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn,
-			unsigned long data);
-
-static void
-instance_destroy_rcu(struct rcu_head *head)
-{
-	struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance,
-						   rcu);
-
-	nfqnl_flush(inst, NULL, 0);
-	kfree(inst);
-	module_put(THIS_MODULE);
-}
-
-static void
-__instance_destroy(struct nfqnl_instance *inst)
-{
-	hlist_del_rcu(&inst->hlist);
-	call_rcu(&inst->rcu, instance_destroy_rcu);
-}
-
-static void
-instance_destroy(struct nfnl_queue_net *q, struct nfqnl_instance *inst)
-{
-	spin_lock(&q->instances_lock);
-	__instance_destroy(inst);
-	spin_unlock(&q->instances_lock);
-}
-
-static inline void
-__enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry)
-{
-       list_add_tail(&entry->list, &queue->queue_list);
-       queue->queue_total++;
-}
-
-static void
-__dequeue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry)
-{
-	list_del(&entry->list);
-	queue->queue_total--;
-}
-
-static struct nf_queue_entry *
-find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id)
-{
-	struct nf_queue_entry *entry = NULL, *i;
-
-	spin_lock_bh(&queue->lock);
-
-	list_for_each_entry(i, &queue->queue_list, list) {
-		if (i->id == id) {
-			entry = i;
-			break;
-		}
-	}
-
-	if (entry)
-		__dequeue_entry(queue, entry);
-
-	spin_unlock_bh(&queue->lock);
-
-	return entry;
-}
-
-static void
-nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data)
-{
-	struct nf_queue_entry *entry, *next;
-
-	spin_lock_bh(&queue->lock);
-	list_for_each_entry_safe(entry, next, &queue->queue_list, list) {
-		if (!cmpfn || cmpfn(entry, data)) {
-			list_del(&entry->list);
-			queue->queue_total--;
-			nf_reinject(entry, NF_DROP);
-		}
-	}
-	spin_unlock_bh(&queue->lock);
-}
-
-static int
-nfqnl_put_packet_info(struct sk_buff *nlskb, struct sk_buff *packet,
-		      bool csum_verify)
-{
-	__u32 flags = 0;
-
-	if (packet->ip_summed == CHECKSUM_PARTIAL)
-		flags = NFQA_SKB_CSUMNOTREADY;
-	else if (csum_verify)
-		flags = NFQA_SKB_CSUM_NOTVERIFIED;
-
-	if (skb_is_gso(packet))
-		flags |= NFQA_SKB_GSO;
-
-	return flags ? nla_put_be32(nlskb, NFQA_SKB_INFO, htonl(flags)) : 0;
-}
-
-static int nfqnl_put_sk_uidgid(struct sk_buff *skb, struct sock *sk)
-{
-	const struct cred *cred;
-
-	if (!sk_fullsock(sk))
-		return 0;
-
-	read_lock_bh(&sk->sk_callback_lock);
-	if (sk->sk_socket && sk->sk_socket->file) {
-		cred = sk->sk_socket->file->f_cred;
-		if (nla_put_be32(skb, NFQA_UID,
-		    htonl(from_kuid_munged(&init_user_ns, cred->fsuid))))
-			goto nla_put_failure;
-		if (nla_put_be32(skb, NFQA_GID,
-		    htonl(from_kgid_munged(&init_user_ns, cred->fsgid))))
-			goto nla_put_failure;
-	}
-	read_unlock_bh(&sk->sk_callback_lock);
-	return 0;
-
-nla_put_failure:
-	read_unlock_bh(&sk->sk_callback_lock);
-	return -1;
-}
-
-static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata)
-{
-	u32 seclen = 0;
-#if IS_ENABLED(CONFIG_NETWORK_SECMARK)
-	if (!skb || !sk_fullsock(skb->sk))
-		return 0;
-
-	read_lock_bh(&skb->sk->sk_callback_lock);
-
-	if (skb->secmark)
-		security_secid_to_secctx(skb->secmark, secdata, &seclen);
-
-	read_unlock_bh(&skb->sk->sk_callback_lock);
-#endif
-	return seclen;
-}
-
-static struct sk_buff *
-nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
-			   struct nf_queue_entry *entry,
-			   __be32 **packet_id_ptr)
-{
-	size_t size;
-	size_t data_len = 0, cap_len = 0, rem_len = 0;
-	unsigned int hlen = 0;
-	struct sk_buff *skb;
-	struct nlattr *nla;
-	struct nfqnl_msg_packet_hdr *pmsg;
-	struct nlmsghdr *nlh;
-	struct nfgenmsg *nfmsg;
-	struct sk_buff *entskb = entry->skb;
-	struct net_device *indev;
-	struct net_device *outdev;
-	struct nf_conn *ct = NULL;
-	enum ip_conntrack_info uninitialized_var(ctinfo);
-	struct nfq_ct_hook *nfq_ct;
-	bool csum_verify;
-	char *secdata = NULL;
-	u32 seclen = 0;
-
-	size =    nlmsg_total_size(sizeof(struct nfgenmsg))
-		+ nla_total_size(sizeof(struct nfqnl_msg_packet_hdr))
-		+ nla_total_size(sizeof(u_int32_t))	/* ifindex */
-		+ nla_total_size(sizeof(u_int32_t))	/* ifindex */
-#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
-		+ nla_total_size(sizeof(u_int32_t))	/* ifindex */
-		+ nla_total_size(sizeof(u_int32_t))	/* ifindex */
-#endif
-		+ nla_total_size(sizeof(u_int32_t))	/* mark */
-		+ nla_total_size(sizeof(struct nfqnl_msg_packet_hw))
-		+ nla_total_size(sizeof(u_int32_t))	/* skbinfo */
-		+ nla_total_size(sizeof(u_int32_t));	/* cap_len */
-
-	if (entskb->tstamp.tv64)
-		size += nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp));
-
-	if (entry->state.hook <= NF_INET_FORWARD ||
-	   (entry->state.hook == NF_INET_POST_ROUTING && entskb->sk == NULL))
-		csum_verify = !skb_csum_unnecessary(entskb);
-	else
-		csum_verify = false;
-
-	outdev = entry->state.out;
-
-	switch ((enum nfqnl_config_mode)ACCESS_ONCE(queue->copy_mode)) {
-	case NFQNL_COPY_META:
-	case NFQNL_COPY_NONE:
-		break;
-
-	case NFQNL_COPY_PACKET:
-		if (!(queue->flags & NFQA_CFG_F_GSO) &&
-		    entskb->ip_summed == CHECKSUM_PARTIAL &&
-		    skb_checksum_help(entskb))
-			return NULL;
-
-		data_len = ACCESS_ONCE(queue->copy_range);
-		if (data_len > entskb->len)
-			data_len = entskb->len;
-
-		hlen = skb_zerocopy_headlen(entskb);
-		hlen = min_t(unsigned int, hlen, data_len);
-		size += sizeof(struct nlattr) + hlen;
-		cap_len = entskb->len;
-		rem_len = data_len - hlen;
-		break;
-	}
-
-	if (queue->flags & NFQA_CFG_F_CONNTRACK) {
-		nfq_ct = rcu_dereference(nfq_ct_hook);
-		if (nfq_ct != NULL) {
-			ct = nfq_ct->get_ct(entskb, &ctinfo);
-			if (ct != NULL)
-				size += nfq_ct->build_size(ct);
-		}
-	}
-
-	if (queue->flags & NFQA_CFG_F_UID_GID) {
-		size +=  (nla_total_size(sizeof(u_int32_t))	/* uid */
-			+ nla_total_size(sizeof(u_int32_t)));	/* gid */
-	}
-
-	if ((queue->flags & NFQA_CFG_F_SECCTX) && entskb->sk) {
-		seclen = nfqnl_get_sk_secctx(entskb, &secdata);
-		if (seclen)
-			size += nla_total_size(seclen);
-	}
-
-	skb = __netlink_alloc_skb(net->nfnl, size, rem_len, queue->peer_portid,
-				  GFP_ATOMIC);
-	if (!skb) {
-		skb_tx_error(entskb);
-		return NULL;
-	}
-
-	nlh = nlmsg_put(skb, 0, 0,
-			NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET,
-			sizeof(struct nfgenmsg), 0);
-	if (!nlh) {
-		skb_tx_error(entskb);
-		kfree_skb(skb);
-		return NULL;
-	}
-	nfmsg = nlmsg_data(nlh);
-	nfmsg->nfgen_family = entry->state.pf;
-	nfmsg->version = NFNETLINK_V0;
-	nfmsg->res_id = htons(queue->queue_num);
-
-	nla = __nla_reserve(skb, NFQA_PACKET_HDR, sizeof(*pmsg));
-	pmsg = nla_data(nla);
-	pmsg->hw_protocol	= entskb->protocol;
-	pmsg->hook		= entry->state.hook;
-	*packet_id_ptr		= &pmsg->packet_id;
-
-	indev = entry->state.in;
-	if (indev) {
-#if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
-		if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, htonl(indev->ifindex)))
-			goto nla_put_failure;
-#else
-		if (entry->state.pf == PF_BRIDGE) {
-			/* Case 1: indev is physical input device, we need to
-			 * look for bridge group (when called from
-			 * netfilter_bridge) */
-			if (nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV,
-					 htonl(indev->ifindex)) ||
-			/* this is the bridge group "brX" */
-			/* rcu_read_lock()ed by __nf_queue */
-			    nla_put_be32(skb, NFQA_IFINDEX_INDEV,
-					 htonl(br_port_get_rcu(indev)->br->dev->ifindex)))
-				goto nla_put_failure;
-		} else {
-			int physinif;
-
-			/* Case 2: indev is bridge group, we need to look for
-			 * physical device (when called from ipv4) */
-			if (nla_put_be32(skb, NFQA_IFINDEX_INDEV,
-					 htonl(indev->ifindex)))
-				goto nla_put_failure;
-
-			physinif = nf_bridge_get_physinif(entskb);
-			if (physinif &&
-			    nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV,
-					 htonl(physinif)))
-				goto nla_put_failure;
-		}
-#endif
-	}
-
-	if (outdev) {
-#if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
-		if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, htonl(outdev->ifindex)))
-			goto nla_put_failure;
-#else
-		if (entry->state.pf == PF_BRIDGE) {
-			/* Case 1: outdev is physical output device, we need to
-			 * look for bridge group (when called from
-			 * netfilter_bridge) */
-			if (nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV,
-					 htonl(outdev->ifindex)) ||
-			/* this is the bridge group "brX" */
-			/* rcu_read_lock()ed by __nf_queue */
-			    nla_put_be32(skb, NFQA_IFINDEX_OUTDEV,
-					 htonl(br_port_get_rcu(outdev)->br->dev->ifindex)))
-				goto nla_put_failure;
-		} else {
-			int physoutif;
-
-			/* Case 2: outdev is bridge group, we need to look for
-			 * physical output device (when called from ipv4) */
-			if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV,
-					 htonl(outdev->ifindex)))
-				goto nla_put_failure;
-
-			physoutif = nf_bridge_get_physoutif(entskb);
-			if (physoutif &&
-			    nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV,
-					 htonl(physoutif)))
-				goto nla_put_failure;
-		}
-#endif
-	}
-
-	if (entskb->mark &&
-	    nla_put_be32(skb, NFQA_MARK, htonl(entskb->mark)))
-		goto nla_put_failure;
-
-	if (indev && entskb->dev &&
-	    entskb->mac_header != entskb->network_header) {
-		struct nfqnl_msg_packet_hw phw;
-		int len;
-
-		memset(&phw, 0, sizeof(phw));
-		len = dev_parse_header(entskb, phw.hw_addr);
-		if (len) {
-			phw.hw_addrlen = htons(len);
-			if (nla_put(skb, NFQA_HWADDR, sizeof(phw), &phw))
-				goto nla_put_failure;
-		}
-	}
-
-	if (entskb->tstamp.tv64) {
-		struct nfqnl_msg_packet_timestamp ts;
-		struct timeval tv = ktime_to_timeval(entskb->tstamp);
-		ts.sec = cpu_to_be64(tv.tv_sec);
-		ts.usec = cpu_to_be64(tv.tv_usec);
-
-		if (nla_put(skb, NFQA_TIMESTAMP, sizeof(ts), &ts))
-			goto nla_put_failure;
-	}
-
-	if ((queue->flags & NFQA_CFG_F_UID_GID) && entskb->sk &&
-	    nfqnl_put_sk_uidgid(skb, entskb->sk) < 0)
-		goto nla_put_failure;
-
-	if (seclen && nla_put(skb, NFQA_SECCTX, seclen, secdata))
-		goto nla_put_failure;
-
-	if (ct && nfq_ct->build(skb, ct, ctinfo, NFQA_CT, NFQA_CT_INFO) < 0)
-		goto nla_put_failure;
-
-	if (cap_len > data_len &&
-	    nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len)))
-		goto nla_put_failure;
-
-	if (nfqnl_put_packet_info(skb, entskb, csum_verify))
-		goto nla_put_failure;
-
-	if (data_len) {
-		struct nlattr *nla;
-
-		if (skb_tailroom(skb) < sizeof(*nla) + hlen)
-			goto nla_put_failure;
-
-		nla = (struct nlattr *)skb_put(skb, sizeof(*nla));
-		nla->nla_type = NFQA_PAYLOAD;
-		nla->nla_len = nla_attr_size(data_len);
-
-		if (skb_zerocopy(skb, entskb, data_len, hlen))
-			goto nla_put_failure;
-	}
-
-	nlh->nlmsg_len = skb->len;
-	return skb;
-
-nla_put_failure:
-	skb_tx_error(entskb);
-	kfree_skb(skb);
-	net_err_ratelimited("nf_queue: error creating packet message\n");
-	return NULL;
-}
-
-static int
-__nfqnl_enqueue_packet(struct net *net, struct nfqnl_instance *queue,
-			struct nf_queue_entry *entry)
-{
-	struct sk_buff *nskb;
-	int err = -ENOBUFS;
-	__be32 *packet_id_ptr;
-	int failopen = 0;
-
-	nskb = nfqnl_build_packet_message(net, queue, entry, &packet_id_ptr);
-	if (nskb == NULL) {
-		err = -ENOMEM;
-		goto err_out;
-	}
-	spin_lock_bh(&queue->lock);
-
-	if (queue->queue_total >= queue->queue_maxlen) {
-		if (queue->flags & NFQA_CFG_F_FAIL_OPEN) {
-			failopen = 1;
-			err = 0;
-		} else {
-			queue->queue_dropped++;
-			net_warn_ratelimited("nf_queue: full at %d entries, dropping packets(s)\n",
-					     queue->queue_total);
-		}
-		goto err_out_free_nskb;
-	}
-	entry->id = ++queue->id_sequence;
-	*packet_id_ptr = htonl(entry->id);
-
-	/* nfnetlink_unicast will either free the nskb or add it to a socket */
-	err = nfnetlink_unicast(nskb, net, queue->peer_portid, MSG_DONTWAIT);
-	if (err < 0) {
-		queue->queue_user_dropped++;
-		goto err_out_unlock;
-	}
-
-	__enqueue_entry(queue, entry);
-
-	spin_unlock_bh(&queue->lock);
-	return 0;
-
-err_out_free_nskb:
-	kfree_skb(nskb);
-err_out_unlock:
-	spin_unlock_bh(&queue->lock);
-	if (failopen)
-		nf_reinject(entry, NF_ACCEPT);
-err_out:
-	return err;
-}
-
-static struct nf_queue_entry *
-nf_queue_entry_dup(struct nf_queue_entry *e)
-{
-	struct nf_queue_entry *entry = kmemdup(e, e->size, GFP_ATOMIC);
-	if (entry) {
-		if (nf_queue_entry_get_refs(entry))
-			return entry;
-		kfree(entry);
-	}
-	return NULL;
-}
-
-#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
-/* When called from bridge netfilter, skb->data must point to MAC header
- * before calling skb_gso_segment(). Else, original MAC header is lost
- * and segmented skbs will be sent to wrong destination.
- */
-static void nf_bridge_adjust_skb_data(struct sk_buff *skb)
-{
-	if (skb->nf_bridge)
-		__skb_push(skb, skb->network_header - skb->mac_header);
-}
-
-static void nf_bridge_adjust_segmented_data(struct sk_buff *skb)
-{
-	if (skb->nf_bridge)
-		__skb_pull(skb, skb->network_header - skb->mac_header);
-}
-#else
-#define nf_bridge_adjust_skb_data(s) do {} while (0)
-#define nf_bridge_adjust_segmented_data(s) do {} while (0)
-#endif
-
-static void free_entry(struct nf_queue_entry *entry)
-{
-	nf_queue_entry_release_refs(entry);
-	kfree(entry);
-}
-
-static int
-__nfqnl_enqueue_packet_gso(struct net *net, struct nfqnl_instance *queue,
-			   struct sk_buff *skb, struct nf_queue_entry *entry)
-{
-	int ret = -ENOMEM;
-	struct nf_queue_entry *entry_seg;
-
-	nf_bridge_adjust_segmented_data(skb);
-
-	if (skb->next == NULL) { /* last packet, no need to copy entry */
-		struct sk_buff *gso_skb = entry->skb;
-		entry->skb = skb;
-		ret = __nfqnl_enqueue_packet(net, queue, entry);
-		if (ret)
-			entry->skb = gso_skb;
-		return ret;
-	}
-
-	skb->next = NULL;
-
-	entry_seg = nf_queue_entry_dup(entry);
-	if (entry_seg) {
-		entry_seg->skb = skb;
-		ret = __nfqnl_enqueue_packet(net, queue, entry_seg);
-		if (ret)
-			free_entry(entry_seg);
-	}
-	return ret;
-}
-
-static int
-nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
-{
-	unsigned int queued;
-	struct nfqnl_instance *queue;
-	struct sk_buff *skb, *segs;
-	int err = -ENOBUFS;
-	struct net *net = entry->state.net;
-	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
-
-	/* rcu_read_lock()ed by nf_hook_slow() */
-	queue = instance_lookup(q, queuenum);
-	if (!queue)
-		return -ESRCH;
-
-	if (queue->copy_mode == NFQNL_COPY_NONE)
-		return -EINVAL;
-
-	skb = entry->skb;
-
-	switch (entry->state.pf) {
-	case NFPROTO_IPV4:
-		skb->protocol = htons(ETH_P_IP);
-		break;
-	case NFPROTO_IPV6:
-		skb->protocol = htons(ETH_P_IPV6);
-		break;
-	}
-
-	if ((queue->flags & NFQA_CFG_F_GSO) || !skb_is_gso(skb))
-		return __nfqnl_enqueue_packet(net, queue, entry);
-
-	nf_bridge_adjust_skb_data(skb);
-	segs = skb_gso_segment(skb, 0);
-	/* Does not use PTR_ERR to limit the number of error codes that can be
-	 * returned by nf_queue.  For instance, callers rely on -ECANCELED to
-	 * mean 'ignore this hook'.
-	 */
-	if (IS_ERR_OR_NULL(segs))
-		goto out_err;
-	queued = 0;
-	err = 0;
-	do {
-		struct sk_buff *nskb = segs->next;
-		if (err == 0)
-			err = __nfqnl_enqueue_packet_gso(net, queue,
-							segs, entry);
-		if (err == 0)
-			queued++;
-		else
-			kfree_skb(segs);
-		segs = nskb;
-	} while (segs);
-
-	if (queued) {
-		if (err) /* some segments are already queued */
-			free_entry(entry);
-		kfree_skb(skb);
-		return 0;
-	}
- out_err:
-	nf_bridge_adjust_segmented_data(skb);
-	return err;
-}
-
-static int
-nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e, int diff)
-{
-	struct sk_buff *nskb;
-
-	if (diff < 0) {
-		if (pskb_trim(e->skb, data_len))
-			return -ENOMEM;
-	} else if (diff > 0) {
-		if (data_len > 0xFFFF)
-			return -EINVAL;
-		if (diff > skb_tailroom(e->skb)) {
-			nskb = skb_copy_expand(e->skb, skb_headroom(e->skb),
-					       diff, GFP_ATOMIC);
-			if (!nskb) {
-				printk(KERN_WARNING "nf_queue: OOM "
-				      "in mangle, dropping packet\n");
-				return -ENOMEM;
-			}
-			kfree_skb(e->skb);
-			e->skb = nskb;
-		}
-		skb_put(e->skb, diff);
-	}
-	if (!skb_make_writable(e->skb, data_len))
-		return -ENOMEM;
-	skb_copy_to_linear_data(e->skb, data, data_len);
-	e->skb->ip_summed = CHECKSUM_NONE;
-	return 0;
-}
-
-static int
-nfqnl_set_mode(struct nfqnl_instance *queue,
-	       unsigned char mode, unsigned int range)
-{
-	int status = 0;
-
-	spin_lock_bh(&queue->lock);
-	switch (mode) {
-	case NFQNL_COPY_NONE:
-	case NFQNL_COPY_META:
-		queue->copy_mode = mode;
-		queue->copy_range = 0;
-		break;
-
-	case NFQNL_COPY_PACKET:
-		queue->copy_mode = mode;
-		if (range == 0 || range > NFQNL_MAX_COPY_RANGE)
-			queue->copy_range = NFQNL_MAX_COPY_RANGE;
-		else
-			queue->copy_range = range;
-		break;
-
-	default:
-		status = -EINVAL;
-
-	}
-	spin_unlock_bh(&queue->lock);
-
-	return status;
-}
-
-static int
-dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex)
-{
-	if (entry->state.in)
-		if (entry->state.in->ifindex == ifindex)
-			return 1;
-	if (entry->state.out)
-		if (entry->state.out->ifindex == ifindex)
-			return 1;
-#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
-	if (entry->skb->nf_bridge) {
-		int physinif, physoutif;
-
-		physinif = nf_bridge_get_physinif(entry->skb);
-		physoutif = nf_bridge_get_physoutif(entry->skb);
-
-		if (physinif == ifindex || physoutif == ifindex)
-			return 1;
-	}
-#endif
-	return 0;
-}
-
-/* drop all packets with either indev or outdev == ifindex from all queue
- * instances */
-static void
-nfqnl_dev_drop(struct net *net, int ifindex)
-{
-	int i;
-	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
-
-	rcu_read_lock();
-
-	for (i = 0; i < INSTANCE_BUCKETS; i++) {
-		struct nfqnl_instance *inst;
-		struct hlist_head *head = &q->instance_table[i];
-
-		hlist_for_each_entry_rcu(inst, head, hlist)
-			nfqnl_flush(inst, dev_cmp, ifindex);
-	}
-
-	rcu_read_unlock();
-}
-
-static int
-nfqnl_rcv_dev_event(struct notifier_block *this,
-		    unsigned long event, void *ptr)
-{
-	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-
-	/* Drop any packets associated with the downed device */
-	if (event == NETDEV_DOWN)
-		nfqnl_dev_drop(dev_net(dev), dev->ifindex);
-	return NOTIFY_DONE;
-}
-
-static struct notifier_block nfqnl_dev_notifier = {
-	.notifier_call	= nfqnl_rcv_dev_event,
-};
-
-static int nf_hook_cmp(struct nf_queue_entry *entry, unsigned long ops_ptr)
-{
-	return entry->elem == (struct nf_hook_ops *)ops_ptr;
-}
-
-static void nfqnl_nf_hook_drop(struct net *net, struct nf_hook_ops *hook)
-{
-	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
-	int i;
-
-	rcu_read_lock();
-	for (i = 0; i < INSTANCE_BUCKETS; i++) {
-		struct nfqnl_instance *inst;
-		struct hlist_head *head = &q->instance_table[i];
-
-		hlist_for_each_entry_rcu(inst, head, hlist)
-			nfqnl_flush(inst, nf_hook_cmp, (unsigned long)hook);
-	}
-	rcu_read_unlock();
-}
-
-static int
-nfqnl_rcv_nl_event(struct notifier_block *this,
-		   unsigned long event, void *ptr)
-{
-	struct netlink_notify *n = ptr;
-	struct nfnl_queue_net *q = nfnl_queue_pernet(n->net);
-
-	if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) {
-		int i;
-
-		/* destroy all instances for this portid */
-		spin_lock(&q->instances_lock);
-		for (i = 0; i < INSTANCE_BUCKETS; i++) {
-			struct hlist_node *t2;
-			struct nfqnl_instance *inst;
-			struct hlist_head *head = &q->instance_table[i];
-
-			hlist_for_each_entry_safe(inst, t2, head, hlist) {
-				if (n->portid == inst->peer_portid)
-					__instance_destroy(inst);
-			}
-		}
-		spin_unlock(&q->instances_lock);
-	}
-	return NOTIFY_DONE;
-}
-
-static struct notifier_block nfqnl_rtnl_notifier = {
-	.notifier_call	= nfqnl_rcv_nl_event,
-};
-
-static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = {
-	[NFQA_VERDICT_HDR]	= { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
-	[NFQA_MARK]		= { .type = NLA_U32 },
-	[NFQA_PAYLOAD]		= { .type = NLA_UNSPEC },
-	[NFQA_CT]		= { .type = NLA_UNSPEC },
-	[NFQA_EXP]		= { .type = NLA_UNSPEC },
-};
-
-static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = {
-	[NFQA_VERDICT_HDR]	= { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
-	[NFQA_MARK]		= { .type = NLA_U32 },
-};
-
-static struct nfqnl_instance *
-verdict_instance_lookup(struct nfnl_queue_net *q, u16 queue_num, u32 nlportid)
-{
-	struct nfqnl_instance *queue;
-
-	queue = instance_lookup(q, queue_num);
-	if (!queue)
-		return ERR_PTR(-ENODEV);
-
-	if (queue->peer_portid != nlportid)
-		return ERR_PTR(-EPERM);
-
-	return queue;
-}
-
-static struct nfqnl_msg_verdict_hdr*
-verdicthdr_get(const struct nlattr * const nfqa[])
-{
-	struct nfqnl_msg_verdict_hdr *vhdr;
-	unsigned int verdict;
-
-	if (!nfqa[NFQA_VERDICT_HDR])
-		return NULL;
-
-	vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]);
-	verdict = ntohl(vhdr->verdict) & NF_VERDICT_MASK;
-	if (verdict > NF_MAX_VERDICT || verdict == NF_STOLEN)
-		return NULL;
-	return vhdr;
-}
-
-static int nfq_id_after(unsigned int id, unsigned int max)
-{
-	return (int)(id - max) > 0;
-}
-
-static int
-nfqnl_recv_verdict_batch(struct sock *ctnl, struct sk_buff *skb,
-		   const struct nlmsghdr *nlh,
-		   const struct nlattr * const nfqa[])
-{
-	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
-	struct nf_queue_entry *entry, *tmp;
-	unsigned int verdict, maxid;
-	struct nfqnl_msg_verdict_hdr *vhdr;
-	struct nfqnl_instance *queue;
-	LIST_HEAD(batch_list);
-	u16 queue_num = ntohs(nfmsg->res_id);
-
-	struct net *net = sock_net(ctnl);
-	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
-
-	queue = verdict_instance_lookup(q, queue_num,
-					NETLINK_CB(skb).portid);
-	if (IS_ERR(queue))
-		return PTR_ERR(queue);
-
-	vhdr = verdicthdr_get(nfqa);
-	if (!vhdr)
-		return -EINVAL;
-
-	verdict = ntohl(vhdr->verdict);
-	maxid = ntohl(vhdr->id);
-
-	spin_lock_bh(&queue->lock);
-
-	list_for_each_entry_safe(entry, tmp, &queue->queue_list, list) {
-		if (nfq_id_after(entry->id, maxid))
-			break;
-		__dequeue_entry(queue, entry);
-		list_add_tail(&entry->list, &batch_list);
-	}
-
-	spin_unlock_bh(&queue->lock);
-
-	if (list_empty(&batch_list))
-		return -ENOENT;
-
-	list_for_each_entry_safe(entry, tmp, &batch_list, list) {
-		if (nfqa[NFQA_MARK])
-			entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
-		nf_reinject(entry, verdict);
-	}
-	return 0;
-}
-
-static struct nf_conn *nfqnl_ct_parse(struct nfq_ct_hook *nfq_ct,
-				      const struct nlmsghdr *nlh,
-				      const struct nlattr * const nfqa[],
-				      struct nf_queue_entry *entry,
-				      enum ip_conntrack_info *ctinfo)
-{
-	struct nf_conn *ct;
-
-	ct = nfq_ct->get_ct(entry->skb, ctinfo);
-	if (ct == NULL)
-		return NULL;
-
-	if (nfq_ct->parse(nfqa[NFQA_CT], ct) < 0)
-		return NULL;
-
-	if (nfqa[NFQA_EXP])
-		nfq_ct->attach_expect(nfqa[NFQA_EXP], ct,
-				      NETLINK_CB(entry->skb).portid,
-				      nlmsg_report(nlh));
-	return ct;
-}
-
-static int
-nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
-		   const struct nlmsghdr *nlh,
-		   const struct nlattr * const nfqa[])
-{
-	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
-	u_int16_t queue_num = ntohs(nfmsg->res_id);
-
-	struct nfqnl_msg_verdict_hdr *vhdr;
-	struct nfqnl_instance *queue;
-	unsigned int verdict;
-	struct nf_queue_entry *entry;
-	enum ip_conntrack_info uninitialized_var(ctinfo);
-	struct nfq_ct_hook *nfq_ct;
-	struct nf_conn *ct = NULL;
-
-	struct net *net = sock_net(ctnl);
-	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
-
-	queue = instance_lookup(q, queue_num);
-	if (!queue)
-		queue = verdict_instance_lookup(q, queue_num,
-						NETLINK_CB(skb).portid);
-	if (IS_ERR(queue))
-		return PTR_ERR(queue);
-
-	vhdr = verdicthdr_get(nfqa);
-	if (!vhdr)
-		return -EINVAL;
-
-	verdict = ntohl(vhdr->verdict);
-
-	entry = find_dequeue_entry(queue, ntohl(vhdr->id));
-	if (entry == NULL)
-		return -ENOENT;
-
-	if (nfqa[NFQA_CT]) {
-		/* rcu lock already held from nfnl->call_rcu. */
-		nfq_ct = rcu_dereference(nfq_ct_hook);
-		if (nfq_ct != NULL)
-			ct = nfqnl_ct_parse(nfq_ct, nlh, nfqa, entry, &ctinfo);
-	}
-
-	if (nfqa[NFQA_PAYLOAD]) {
-		u16 payload_len = nla_len(nfqa[NFQA_PAYLOAD]);
-		int diff = payload_len - entry->skb->len;
-
-		if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]),
-				 payload_len, entry, diff) < 0)
-			verdict = NF_DROP;
-
-		if (ct && diff)
-			nfq_ct->seq_adjust(entry->skb, ct, ctinfo, diff);
-	}
-
-	if (nfqa[NFQA_MARK])
-		entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
-
-	nf_reinject(entry, verdict);
-	return 0;
-}
-
-static int
-nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
-		  const struct nlmsghdr *nlh,
-		  const struct nlattr * const nfqa[])
-{
-	return -ENOTSUPP;
-}
-
-static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = {
-	[NFQA_CFG_CMD]		= { .len = sizeof(struct nfqnl_msg_config_cmd) },
-	[NFQA_CFG_PARAMS]	= { .len = sizeof(struct nfqnl_msg_config_params) },
-};
-
-static const struct nf_queue_handler nfqh = {
-	.outfn		= &nfqnl_enqueue_packet,
-	.nf_hook_drop	= &nfqnl_nf_hook_drop,
-};
-
-static int
-nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
-		  const struct nlmsghdr *nlh,
-		  const struct nlattr * const nfqa[])
-{
-	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
-	u_int16_t queue_num = ntohs(nfmsg->res_id);
-	struct nfqnl_instance *queue;
-	struct nfqnl_msg_config_cmd *cmd = NULL;
-	struct net *net = sock_net(ctnl);
-	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
-	int ret = 0;
-
-	if (nfqa[NFQA_CFG_CMD]) {
-		cmd = nla_data(nfqa[NFQA_CFG_CMD]);
-
-		/* Obsolete commands without queue context */
-		switch (cmd->command) {
-		case NFQNL_CFG_CMD_PF_BIND: return 0;
-		case NFQNL_CFG_CMD_PF_UNBIND: return 0;
-		}
-	}
-
-	rcu_read_lock();
-	queue = instance_lookup(q, queue_num);
-	if (queue && queue->peer_portid != NETLINK_CB(skb).portid) {
-		ret = -EPERM;
-		goto err_out_unlock;
-	}
-
-	if (cmd != NULL) {
-		switch (cmd->command) {
-		case NFQNL_CFG_CMD_BIND:
-			if (queue) {
-				ret = -EBUSY;
-				goto err_out_unlock;
-			}
-			queue = instance_create(q, queue_num,
-						NETLINK_CB(skb).portid);
-			if (IS_ERR(queue)) {
-				ret = PTR_ERR(queue);
-				goto err_out_unlock;
-			}
-			break;
-		case NFQNL_CFG_CMD_UNBIND:
-			if (!queue) {
-				ret = -ENODEV;
-				goto err_out_unlock;
-			}
-			instance_destroy(q, queue);
-			break;
-		case NFQNL_CFG_CMD_PF_BIND:
-		case NFQNL_CFG_CMD_PF_UNBIND:
-			break;
-		default:
-			ret = -ENOTSUPP;
-			break;
-		}
-	}
-
-	if (nfqa[NFQA_CFG_PARAMS]) {
-		struct nfqnl_msg_config_params *params;
-
-		if (!queue) {
-			ret = -ENODEV;
-			goto err_out_unlock;
-		}
-		params = nla_data(nfqa[NFQA_CFG_PARAMS]);
-		nfqnl_set_mode(queue, params->copy_mode,
-				ntohl(params->copy_range));
-	}
-
-	if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) {
-		__be32 *queue_maxlen;
-
-		if (!queue) {
-			ret = -ENODEV;
-			goto err_out_unlock;
-		}
-		queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]);
-		spin_lock_bh(&queue->lock);
-		queue->queue_maxlen = ntohl(*queue_maxlen);
-		spin_unlock_bh(&queue->lock);
-	}
-
-	if (nfqa[NFQA_CFG_FLAGS]) {
-		__u32 flags, mask;
-
-		if (!queue) {
-			ret = -ENODEV;
-			goto err_out_unlock;
-		}
-
-		if (!nfqa[NFQA_CFG_MASK]) {
-			/* A mask is needed to specify which flags are being
-			 * changed.
-			 */
-			ret = -EINVAL;
-			goto err_out_unlock;
-		}
-
-		flags = ntohl(nla_get_be32(nfqa[NFQA_CFG_FLAGS]));
-		mask = ntohl(nla_get_be32(nfqa[NFQA_CFG_MASK]));
-
-		if (flags >= NFQA_CFG_F_MAX) {
-			ret = -EOPNOTSUPP;
-			goto err_out_unlock;
-		}
-#if !IS_ENABLED(CONFIG_NETWORK_SECMARK)
-		if (flags & mask & NFQA_CFG_F_SECCTX) {
-			ret = -EOPNOTSUPP;
-			goto err_out_unlock;
-		}
-#endif
-		spin_lock_bh(&queue->lock);
-		queue->flags &= ~mask;
-		queue->flags |= flags & mask;
-		spin_unlock_bh(&queue->lock);
-	}
-
-err_out_unlock:
-	rcu_read_unlock();
-	return ret;
-}
-
-static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = {
-	[NFQNL_MSG_PACKET]	= { .call_rcu = nfqnl_recv_unsupp,
-				    .attr_count = NFQA_MAX, },
-	[NFQNL_MSG_VERDICT]	= { .call_rcu = nfqnl_recv_verdict,
-				    .attr_count = NFQA_MAX,
-				    .policy = nfqa_verdict_policy },
-	[NFQNL_MSG_CONFIG]	= { .call = nfqnl_recv_config,
-				    .attr_count = NFQA_CFG_MAX,
-				    .policy = nfqa_cfg_policy },
-	[NFQNL_MSG_VERDICT_BATCH]={ .call_rcu = nfqnl_recv_verdict_batch,
-				    .attr_count = NFQA_MAX,
-				    .policy = nfqa_verdict_batch_policy },
-};
-
-static const struct nfnetlink_subsystem nfqnl_subsys = {
-	.name		= "nf_queue",
-	.subsys_id	= NFNL_SUBSYS_QUEUE,
-	.cb_count	= NFQNL_MSG_MAX,
-	.cb		= nfqnl_cb,
-};
-
-#ifdef CONFIG_PROC_FS
-struct iter_state {
-	struct seq_net_private p;
-	unsigned int bucket;
-};
-
-static struct hlist_node *get_first(struct seq_file *seq)
-{
-	struct iter_state *st = seq->private;
-	struct net *net;
-	struct nfnl_queue_net *q;
-
-	if (!st)
-		return NULL;
-
-	net = seq_file_net(seq);
-	q = nfnl_queue_pernet(net);
-	for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) {
-		if (!hlist_empty(&q->instance_table[st->bucket]))
-			return q->instance_table[st->bucket].first;
-	}
-	return NULL;
-}
-
-static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h)
-{
-	struct iter_state *st = seq->private;
-	struct net *net = seq_file_net(seq);
-
-	h = h->next;
-	while (!h) {
-		struct nfnl_queue_net *q;
-
-		if (++st->bucket >= INSTANCE_BUCKETS)
-			return NULL;
-
-		q = nfnl_queue_pernet(net);
-		h = q->instance_table[st->bucket].first;
-	}
-	return h;
-}
-
-static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos)
-{
-	struct hlist_node *head;
-	head = get_first(seq);
-
-	if (head)
-		while (pos && (head = get_next(seq, head)))
-			pos--;
-	return pos ? NULL : head;
-}
-
-static void *seq_start(struct seq_file *s, loff_t *pos)
-	__acquires(nfnl_queue_pernet(seq_file_net(s))->instances_lock)
-{
-	spin_lock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock);
-	return get_idx(s, *pos);
-}
-
-static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
-{
-	(*pos)++;
-	return get_next(s, v);
-}
-
-static void seq_stop(struct seq_file *s, void *v)
-	__releases(nfnl_queue_pernet(seq_file_net(s))->instances_lock)
-{
-	spin_unlock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock);
-}
-
-static int seq_show(struct seq_file *s, void *v)
-{
-	const struct nfqnl_instance *inst = v;
-
-	seq_printf(s, "%5u %6u %5u %1u %5u %5u %5u %8u %2d\n",
-		   inst->queue_num,
-		   inst->peer_portid, inst->queue_total,
-		   inst->copy_mode, inst->copy_range,
-		   inst->queue_dropped, inst->queue_user_dropped,
-		   inst->id_sequence, 1);
-	return 0;
-}
-
-static const struct seq_operations nfqnl_seq_ops = {
-	.start	= seq_start,
-	.next	= seq_next,
-	.stop	= seq_stop,
-	.show	= seq_show,
-};
-
-static int nfqnl_open(struct inode *inode, struct file *file)
-{
-	return seq_open_net(inode, file, &nfqnl_seq_ops,
-			sizeof(struct iter_state));
-}
-
-static const struct file_operations nfqnl_file_ops = {
-	.owner	 = THIS_MODULE,
-	.open	 = nfqnl_open,
-	.read	 = seq_read,
-	.llseek	 = seq_lseek,
-	.release = seq_release_net,
-};
-
-#endif /* PROC_FS */
-
-static int __net_init nfnl_queue_net_init(struct net *net)
-{
-	unsigned int i;
-	struct nfnl_queue_net *q = nfnl_queue_pernet(net);
-
-	for (i = 0; i < INSTANCE_BUCKETS; i++)
-		INIT_HLIST_HEAD(&q->instance_table[i]);
-
-	spin_lock_init(&q->instances_lock);
-
-#ifdef CONFIG_PROC_FS
-	if (!proc_create("nfnetlink_queue", 0440,
-			 net->nf.proc_netfilter, &nfqnl_file_ops))
-		return -ENOMEM;
-#endif
-	return 0;
-}
-
-static void __net_exit nfnl_queue_net_exit(struct net *net)
-{
-#ifdef CONFIG_PROC_FS
-	remove_proc_entry("nfnetlink_queue", net->nf.proc_netfilter);
-#endif
-}
-
-static struct pernet_operations nfnl_queue_net_ops = {
-	.init	= nfnl_queue_net_init,
-	.exit	= nfnl_queue_net_exit,
-	.id	= &nfnl_queue_net_id,
-	.size	= sizeof(struct nfnl_queue_net),
-};
-
-static int __init nfnetlink_queue_init(void)
-{
-	int status;
-
-	status = register_pernet_subsys(&nfnl_queue_net_ops);
-	if (status < 0) {
-		pr_err("nf_queue: failed to register pernet ops\n");
-		goto out;
-	}
-
-	netlink_register_notifier(&nfqnl_rtnl_notifier);
-	status = nfnetlink_subsys_register(&nfqnl_subsys);
-	if (status < 0) {
-		pr_err("nf_queue: failed to create netlink socket\n");
-		goto cleanup_netlink_notifier;
-	}
-
-	register_netdevice_notifier(&nfqnl_dev_notifier);
-	nf_register_queue_handler(&nfqh);
-	return status;
-
-cleanup_netlink_notifier:
-	netlink_unregister_notifier(&nfqnl_rtnl_notifier);
-out:
-	return status;
-}
-
-static void __exit nfnetlink_queue_fini(void)
-{
-	nf_unregister_queue_handler();
-	unregister_netdevice_notifier(&nfqnl_dev_notifier);
-	nfnetlink_subsys_unregister(&nfqnl_subsys);
-	netlink_unregister_notifier(&nfqnl_rtnl_notifier);
-	unregister_pernet_subsys(&nfnl_queue_net_ops);
-
-	rcu_barrier(); /* Wait for completion of call_rcu()'s */
-}
-
-MODULE_DESCRIPTION("netfilter packet queue handler");
-MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE);
-
-module_init(nfnetlink_queue_init);
-module_exit(nfnetlink_queue_fini);