2 * This is a module which is used for queueing packets and communicating with
3 * userspace via nfnetlink.
5 * (C) 2005 by Harald Welte <laforge@netfilter.org>
6 * (C) 2007 by Patrick McHardy <kaber@trash.net>
8 * Based on the old ipv4-only ip_queue.c:
9 * (C) 2000-2002 James Morris <jmorris@intercode.com.au>
10 * (C) 2003-2005 Netfilter Core Team <coreteam@netfilter.org>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
17 #include <linux/module.h>
18 #include <linux/skbuff.h>
19 #include <linux/init.h>
20 #include <linux/spinlock.h>
21 #include <linux/notifier.h>
22 #include <linux/netdevice.h>
23 #include <linux/netfilter.h>
24 #include <linux/proc_fs.h>
25 #include <linux/netfilter_ipv4.h>
26 #include <linux/netfilter_ipv6.h>
27 #include <linux/netfilter/nfnetlink.h>
28 #include <linux/netfilter/nfnetlink_queue.h>
29 #include <linux/list.h>
31 #include <net/netfilter/nf_queue.h>
33 #include <asm/atomic.h>
35 #ifdef CONFIG_BRIDGE_NETFILTER
36 #include "../bridge/br_private.h"
39 #define NFQNL_QMAX_DEFAULT 1024
41 struct nfqnl_instance {
42 struct hlist_node hlist; /* global list of queues */
46 unsigned int queue_maxlen;
47 unsigned int copy_range;
48 unsigned int queue_total;
49 unsigned int queue_dropped;
50 unsigned int queue_user_dropped;
52 unsigned int id_sequence; /* 'sequence' of pkt ids */
54 u_int16_t queue_num; /* number of this queue */
59 struct list_head queue_list; /* packets in queue */
62 typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long);
64 static DEFINE_SPINLOCK(instances_lock);
66 #define INSTANCE_BUCKETS 16
67 static struct hlist_head instance_table[INSTANCE_BUCKETS] __read_mostly;
69 static inline u_int8_t instance_hashfn(u_int16_t queue_num)
71 return ((queue_num >> 8) | queue_num) % INSTANCE_BUCKETS;
74 static struct nfqnl_instance *
75 instance_lookup(u_int16_t queue_num)
77 struct hlist_head *head;
78 struct hlist_node *pos;
79 struct nfqnl_instance *inst;
81 head = &instance_table[instance_hashfn(queue_num)];
82 hlist_for_each_entry_rcu(inst, pos, head, hlist) {
83 if (inst->queue_num == queue_num)
89 static struct nfqnl_instance *
90 instance_create(u_int16_t queue_num, int pid)
92 struct nfqnl_instance *inst;
96 spin_lock(&instances_lock);
97 if (instance_lookup(queue_num)) {
102 inst = kzalloc(sizeof(*inst), GFP_ATOMIC);
108 inst->queue_num = queue_num;
109 inst->peer_pid = pid;
110 inst->queue_maxlen = NFQNL_QMAX_DEFAULT;
111 inst->copy_range = 0xfffff;
112 inst->copy_mode = NFQNL_COPY_NONE;
113 spin_lock_init(&inst->lock);
114 INIT_LIST_HEAD(&inst->queue_list);
116 if (!try_module_get(THIS_MODULE)) {
121 h = instance_hashfn(queue_num);
122 hlist_add_head_rcu(&inst->hlist, &instance_table[h]);
124 spin_unlock(&instances_lock);
131 spin_unlock(&instances_lock);
135 static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn,
139 instance_destroy_rcu(struct rcu_head *head)
141 struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance,
144 nfqnl_flush(inst, NULL, 0);
146 module_put(THIS_MODULE);
150 __instance_destroy(struct nfqnl_instance *inst)
152 hlist_del_rcu(&inst->hlist);
153 call_rcu(&inst->rcu, instance_destroy_rcu);
157 instance_destroy(struct nfqnl_instance *inst)
159 spin_lock(&instances_lock);
160 __instance_destroy(inst);
161 spin_unlock(&instances_lock);
165 __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry)
167 list_add_tail(&entry->list, &queue->queue_list);
168 queue->queue_total++;
171 static struct nf_queue_entry *
172 find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id)
174 struct nf_queue_entry *entry = NULL, *i;
176 spin_lock_bh(&queue->lock);
178 list_for_each_entry(i, &queue->queue_list, list) {
186 list_del(&entry->list);
187 queue->queue_total--;
190 spin_unlock_bh(&queue->lock);
196 nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data)
198 struct nf_queue_entry *entry, *next;
200 spin_lock_bh(&queue->lock);
201 list_for_each_entry_safe(entry, next, &queue->queue_list, list) {
202 if (!cmpfn || cmpfn(entry, data)) {
203 list_del(&entry->list);
204 queue->queue_total--;
205 nf_reinject(entry, NF_DROP);
208 spin_unlock_bh(&queue->lock);
211 static struct sk_buff *
212 nfqnl_build_packet_message(struct nfqnl_instance *queue,
213 struct nf_queue_entry *entry)
215 sk_buff_data_t old_tail;
219 struct nfqnl_msg_packet_hdr pmsg;
220 struct nlmsghdr *nlh;
221 struct nfgenmsg *nfmsg;
222 struct sk_buff *entskb = entry->skb;
223 struct net_device *indev;
224 struct net_device *outdev;
226 size = NLMSG_SPACE(sizeof(struct nfgenmsg))
227 + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr))
228 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
229 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
230 #ifdef CONFIG_BRIDGE_NETFILTER
231 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
232 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
234 + nla_total_size(sizeof(u_int32_t)) /* mark */
235 + nla_total_size(sizeof(struct nfqnl_msg_packet_hw))
236 + nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp));
238 outdev = entry->outdev;
240 spin_lock_bh(&queue->lock);
242 switch ((enum nfqnl_config_mode)queue->copy_mode) {
243 case NFQNL_COPY_META:
244 case NFQNL_COPY_NONE:
247 case NFQNL_COPY_PACKET:
248 if ((entskb->ip_summed == CHECKSUM_PARTIAL ||
249 entskb->ip_summed == CHECKSUM_COMPLETE) &&
250 skb_checksum_help(entskb)) {
251 spin_unlock_bh(&queue->lock);
254 if (queue->copy_range == 0
255 || queue->copy_range > entskb->len)
256 data_len = entskb->len;
258 data_len = queue->copy_range;
260 size += nla_total_size(data_len);
264 entry->id = queue->id_sequence++;
266 spin_unlock_bh(&queue->lock);
268 skb = alloc_skb(size, GFP_ATOMIC);
272 old_tail = skb->tail;
273 nlh = NLMSG_PUT(skb, 0, 0,
274 NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET,
275 sizeof(struct nfgenmsg));
276 nfmsg = NLMSG_DATA(nlh);
277 nfmsg->nfgen_family = entry->pf;
278 nfmsg->version = NFNETLINK_V0;
279 nfmsg->res_id = htons(queue->queue_num);
281 pmsg.packet_id = htonl(entry->id);
282 pmsg.hw_protocol = entskb->protocol;
283 pmsg.hook = entry->hook;
285 NLA_PUT(skb, NFQA_PACKET_HDR, sizeof(pmsg), &pmsg);
287 indev = entry->indev;
289 #ifndef CONFIG_BRIDGE_NETFILTER
290 NLA_PUT_BE32(skb, NFQA_IFINDEX_INDEV, htonl(indev->ifindex));
292 if (entry->pf == PF_BRIDGE) {
293 /* Case 1: indev is physical input device, we need to
294 * look for bridge group (when called from
295 * netfilter_bridge) */
296 NLA_PUT_BE32(skb, NFQA_IFINDEX_PHYSINDEV,
297 htonl(indev->ifindex));
298 /* this is the bridge group "brX" */
299 NLA_PUT_BE32(skb, NFQA_IFINDEX_INDEV,
300 htonl(indev->br_port->br->dev->ifindex));
302 /* Case 2: indev is bridge group, we need to look for
303 * physical device (when called from ipv4) */
304 NLA_PUT_BE32(skb, NFQA_IFINDEX_INDEV,
305 htonl(indev->ifindex));
306 if (entskb->nf_bridge && entskb->nf_bridge->physindev)
307 NLA_PUT_BE32(skb, NFQA_IFINDEX_PHYSINDEV,
308 htonl(entskb->nf_bridge->physindev->ifindex));
314 #ifndef CONFIG_BRIDGE_NETFILTER
315 NLA_PUT_BE32(skb, NFQA_IFINDEX_OUTDEV, htonl(outdev->ifindex));
317 if (entry->pf == PF_BRIDGE) {
318 /* Case 1: outdev is physical output device, we need to
319 * look for bridge group (when called from
320 * netfilter_bridge) */
321 NLA_PUT_BE32(skb, NFQA_IFINDEX_PHYSOUTDEV,
322 htonl(outdev->ifindex));
323 /* this is the bridge group "brX" */
324 NLA_PUT_BE32(skb, NFQA_IFINDEX_OUTDEV,
325 htonl(outdev->br_port->br->dev->ifindex));
327 /* Case 2: outdev is bridge group, we need to look for
328 * physical output device (when called from ipv4) */
329 NLA_PUT_BE32(skb, NFQA_IFINDEX_OUTDEV,
330 htonl(outdev->ifindex));
331 if (entskb->nf_bridge && entskb->nf_bridge->physoutdev)
332 NLA_PUT_BE32(skb, NFQA_IFINDEX_PHYSOUTDEV,
333 htonl(entskb->nf_bridge->physoutdev->ifindex));
339 NLA_PUT_BE32(skb, NFQA_MARK, htonl(entskb->mark));
341 if (indev && entskb->dev) {
342 struct nfqnl_msg_packet_hw phw;
343 int len = dev_parse_header(entskb, phw.hw_addr);
345 phw.hw_addrlen = htons(len);
346 NLA_PUT(skb, NFQA_HWADDR, sizeof(phw), &phw);
350 if (entskb->tstamp.tv64) {
351 struct nfqnl_msg_packet_timestamp ts;
352 struct timeval tv = ktime_to_timeval(entskb->tstamp);
353 ts.sec = cpu_to_be64(tv.tv_sec);
354 ts.usec = cpu_to_be64(tv.tv_usec);
356 NLA_PUT(skb, NFQA_TIMESTAMP, sizeof(ts), &ts);
361 int sz = nla_attr_size(data_len);
363 if (skb_tailroom(skb) < nla_total_size(data_len)) {
364 printk(KERN_WARNING "nf_queue: no tailroom!\n");
368 nla = (struct nlattr *)skb_put(skb, nla_total_size(data_len));
369 nla->nla_type = NFQA_PAYLOAD;
372 if (skb_copy_bits(entskb, 0, nla_data(nla), data_len))
376 nlh->nlmsg_len = skb->tail - old_tail;
384 printk(KERN_ERR "nf_queue: error creating packet message\n");
389 nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
391 struct sk_buff *nskb;
392 struct nfqnl_instance *queue;
395 /* rcu_read_lock()ed by nf_hook_slow() */
396 queue = instance_lookup(queuenum);
400 if (queue->copy_mode == NFQNL_COPY_NONE)
403 nskb = nfqnl_build_packet_message(queue, entry);
407 spin_lock_bh(&queue->lock);
409 if (!queue->peer_pid)
410 goto err_out_free_nskb;
412 if (queue->queue_total >= queue->queue_maxlen) {
413 queue->queue_dropped++;
415 printk(KERN_WARNING "nf_queue: full at %d entries, "
416 "dropping packets(s).\n",
418 goto err_out_free_nskb;
421 /* nfnetlink_unicast will either free the nskb or add it to a socket */
422 err = nfnetlink_unicast(nskb, &init_net, queue->peer_pid, MSG_DONTWAIT);
424 queue->queue_user_dropped++;
428 __enqueue_entry(queue, entry);
430 spin_unlock_bh(&queue->lock);
436 spin_unlock_bh(&queue->lock);
442 nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e)
444 struct sk_buff *nskb;
447 diff = data_len - e->skb->len;
449 if (pskb_trim(e->skb, data_len))
451 } else if (diff > 0) {
452 if (data_len > 0xFFFF)
454 if (diff > skb_tailroom(e->skb)) {
455 nskb = skb_copy_expand(e->skb, skb_headroom(e->skb),
458 printk(KERN_WARNING "nf_queue: OOM "
459 "in mangle, dropping packet\n");
465 skb_put(e->skb, diff);
467 if (!skb_make_writable(e->skb, data_len))
469 skb_copy_to_linear_data(e->skb, data, data_len);
470 e->skb->ip_summed = CHECKSUM_NONE;
475 nfqnl_set_mode(struct nfqnl_instance *queue,
476 unsigned char mode, unsigned int range)
480 spin_lock_bh(&queue->lock);
482 case NFQNL_COPY_NONE:
483 case NFQNL_COPY_META:
484 queue->copy_mode = mode;
485 queue->copy_range = 0;
488 case NFQNL_COPY_PACKET:
489 queue->copy_mode = mode;
490 /* we're using struct nlattr which has 16bit nla_len */
492 queue->copy_range = 0xffff;
494 queue->copy_range = range;
501 spin_unlock_bh(&queue->lock);
507 dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex)
510 if (entry->indev->ifindex == ifindex)
513 if (entry->outdev->ifindex == ifindex)
515 #ifdef CONFIG_BRIDGE_NETFILTER
516 if (entry->skb->nf_bridge) {
517 if (entry->skb->nf_bridge->physindev &&
518 entry->skb->nf_bridge->physindev->ifindex == ifindex)
520 if (entry->skb->nf_bridge->physoutdev &&
521 entry->skb->nf_bridge->physoutdev->ifindex == ifindex)
528 /* drop all packets with either indev or outdev == ifindex from all queue
531 nfqnl_dev_drop(int ifindex)
537 for (i = 0; i < INSTANCE_BUCKETS; i++) {
538 struct hlist_node *tmp;
539 struct nfqnl_instance *inst;
540 struct hlist_head *head = &instance_table[i];
542 hlist_for_each_entry_rcu(inst, tmp, head, hlist)
543 nfqnl_flush(inst, dev_cmp, ifindex);
549 #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0)
552 nfqnl_rcv_dev_event(struct notifier_block *this,
553 unsigned long event, void *ptr)
555 struct net_device *dev = ptr;
557 if (!net_eq(dev_net(dev), &init_net))
560 /* Drop any packets associated with the downed device */
561 if (event == NETDEV_DOWN)
562 nfqnl_dev_drop(dev->ifindex);
566 static struct notifier_block nfqnl_dev_notifier = {
567 .notifier_call = nfqnl_rcv_dev_event,
571 nfqnl_rcv_nl_event(struct notifier_block *this,
572 unsigned long event, void *ptr)
574 struct netlink_notify *n = ptr;
576 if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) {
579 /* destroy all instances for this pid */
580 spin_lock(&instances_lock);
581 for (i = 0; i < INSTANCE_BUCKETS; i++) {
582 struct hlist_node *tmp, *t2;
583 struct nfqnl_instance *inst;
584 struct hlist_head *head = &instance_table[i];
586 hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) {
587 if ((n->net == &init_net) &&
588 (n->pid == inst->peer_pid))
589 __instance_destroy(inst);
592 spin_unlock(&instances_lock);
597 static struct notifier_block nfqnl_rtnl_notifier = {
598 .notifier_call = nfqnl_rcv_nl_event,
601 static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = {
602 [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
603 [NFQA_MARK] = { .type = NLA_U32 },
604 [NFQA_PAYLOAD] = { .type = NLA_UNSPEC },
608 nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
609 const struct nlmsghdr *nlh,
610 const struct nlattr * const nfqa[])
612 struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
613 u_int16_t queue_num = ntohs(nfmsg->res_id);
615 struct nfqnl_msg_verdict_hdr *vhdr;
616 struct nfqnl_instance *queue;
617 unsigned int verdict;
618 struct nf_queue_entry *entry;
622 queue = instance_lookup(queue_num);
628 if (queue->peer_pid != NETLINK_CB(skb).pid) {
633 if (!nfqa[NFQA_VERDICT_HDR]) {
638 vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]);
639 verdict = ntohl(vhdr->verdict);
641 if ((verdict & NF_VERDICT_MASK) > NF_MAX_VERDICT) {
646 entry = find_dequeue_entry(queue, ntohl(vhdr->id));
653 if (nfqa[NFQA_PAYLOAD]) {
654 if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]),
655 nla_len(nfqa[NFQA_PAYLOAD]), entry) < 0)
660 entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
662 nf_reinject(entry, verdict);
671 nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
672 const struct nlmsghdr *nlh,
673 const struct nlattr * const nfqa[])
678 static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = {
679 [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) },
680 [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) },
683 static const struct nf_queue_handler nfqh = {
685 .outfn = &nfqnl_enqueue_packet,
689 nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
690 const struct nlmsghdr *nlh,
691 const struct nlattr * const nfqa[])
693 struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
694 u_int16_t queue_num = ntohs(nfmsg->res_id);
695 struct nfqnl_instance *queue;
696 struct nfqnl_msg_config_cmd *cmd = NULL;
699 if (nfqa[NFQA_CFG_CMD]) {
700 cmd = nla_data(nfqa[NFQA_CFG_CMD]);
702 /* Commands without queue context - might sleep */
703 switch (cmd->command) {
704 case NFQNL_CFG_CMD_PF_BIND:
705 return nf_register_queue_handler(ntohs(cmd->pf),
707 case NFQNL_CFG_CMD_PF_UNBIND:
708 return nf_unregister_queue_handler(ntohs(cmd->pf),
714 queue = instance_lookup(queue_num);
715 if (queue && queue->peer_pid != NETLINK_CB(skb).pid) {
721 switch (cmd->command) {
722 case NFQNL_CFG_CMD_BIND:
727 queue = instance_create(queue_num, NETLINK_CB(skb).pid);
729 ret = PTR_ERR(queue);
733 case NFQNL_CFG_CMD_UNBIND:
738 instance_destroy(queue);
740 case NFQNL_CFG_CMD_PF_BIND:
741 case NFQNL_CFG_CMD_PF_UNBIND:
749 if (nfqa[NFQA_CFG_PARAMS]) {
750 struct nfqnl_msg_config_params *params;
756 params = nla_data(nfqa[NFQA_CFG_PARAMS]);
757 nfqnl_set_mode(queue, params->copy_mode,
758 ntohl(params->copy_range));
761 if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) {
762 __be32 *queue_maxlen;
768 queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]);
769 spin_lock_bh(&queue->lock);
770 queue->queue_maxlen = ntohl(*queue_maxlen);
771 spin_unlock_bh(&queue->lock);
779 static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = {
780 [NFQNL_MSG_PACKET] = { .call = nfqnl_recv_unsupp,
781 .attr_count = NFQA_MAX, },
782 [NFQNL_MSG_VERDICT] = { .call = nfqnl_recv_verdict,
783 .attr_count = NFQA_MAX,
784 .policy = nfqa_verdict_policy },
785 [NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config,
786 .attr_count = NFQA_CFG_MAX,
787 .policy = nfqa_cfg_policy },
790 static const struct nfnetlink_subsystem nfqnl_subsys = {
792 .subsys_id = NFNL_SUBSYS_QUEUE,
793 .cb_count = NFQNL_MSG_MAX,
797 #ifdef CONFIG_PROC_FS
802 static struct hlist_node *get_first(struct seq_file *seq)
804 struct iter_state *st = seq->private;
809 for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) {
810 if (!hlist_empty(&instance_table[st->bucket]))
811 return instance_table[st->bucket].first;
816 static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h)
818 struct iter_state *st = seq->private;
822 if (++st->bucket >= INSTANCE_BUCKETS)
825 h = instance_table[st->bucket].first;
830 static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos)
832 struct hlist_node *head;
833 head = get_first(seq);
836 while (pos && (head = get_next(seq, head)))
838 return pos ? NULL : head;
841 static void *seq_start(struct seq_file *seq, loff_t *pos)
842 __acquires(instances_lock)
844 spin_lock(&instances_lock);
845 return get_idx(seq, *pos);
848 static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
851 return get_next(s, v);
854 static void seq_stop(struct seq_file *s, void *v)
855 __releases(instances_lock)
857 spin_unlock(&instances_lock);
860 static int seq_show(struct seq_file *s, void *v)
862 const struct nfqnl_instance *inst = v;
864 return seq_printf(s, "%5d %6d %5d %1d %5d %5d %5d %8d %2d\n",
866 inst->peer_pid, inst->queue_total,
867 inst->copy_mode, inst->copy_range,
868 inst->queue_dropped, inst->queue_user_dropped,
869 inst->id_sequence, 1);
872 static const struct seq_operations nfqnl_seq_ops = {
879 static int nfqnl_open(struct inode *inode, struct file *file)
881 return seq_open_private(file, &nfqnl_seq_ops,
882 sizeof(struct iter_state));
885 static const struct file_operations nfqnl_file_ops = {
886 .owner = THIS_MODULE,
890 .release = seq_release_private,
895 static int __init nfnetlink_queue_init(void)
897 int i, status = -ENOMEM;
899 for (i = 0; i < INSTANCE_BUCKETS; i++)
900 INIT_HLIST_HEAD(&instance_table[i]);
902 netlink_register_notifier(&nfqnl_rtnl_notifier);
903 status = nfnetlink_subsys_register(&nfqnl_subsys);
905 printk(KERN_ERR "nf_queue: failed to create netlink socket\n");
906 goto cleanup_netlink_notifier;
909 #ifdef CONFIG_PROC_FS
910 if (!proc_create("nfnetlink_queue", 0440,
911 proc_net_netfilter, &nfqnl_file_ops))
915 register_netdevice_notifier(&nfqnl_dev_notifier);
918 #ifdef CONFIG_PROC_FS
920 nfnetlink_subsys_unregister(&nfqnl_subsys);
922 cleanup_netlink_notifier:
923 netlink_unregister_notifier(&nfqnl_rtnl_notifier);
927 static void __exit nfnetlink_queue_fini(void)
929 nf_unregister_queue_handlers(&nfqh);
930 unregister_netdevice_notifier(&nfqnl_dev_notifier);
931 #ifdef CONFIG_PROC_FS
932 remove_proc_entry("nfnetlink_queue", proc_net_netfilter);
934 nfnetlink_subsys_unregister(&nfqnl_subsys);
935 netlink_unregister_notifier(&nfqnl_rtnl_notifier);
937 rcu_barrier(); /* Wait for completion of call_rcu()'s */
940 MODULE_DESCRIPTION("netfilter packet queue handler");
941 MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
942 MODULE_LICENSE("GPL");
943 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE);
945 module_init(nfnetlink_queue_init);
946 module_exit(nfnetlink_queue_fini);