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Merge branch 'pci/resource' into next
[deliverable/linux.git] / net / netfilter / nfnetlink_queue_core.c
1 /*
2 * This is a module which is used for queueing packets and communicating with
3 * userspace via nfnetlink.
4 *
5 * (C) 2005 by Harald Welte <laforge@netfilter.org>
6 * (C) 2007 by Patrick McHardy <kaber@trash.net>
7 *
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>
11 *
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.
15 *
16 */
17 #include <linux/module.h>
18 #include <linux/skbuff.h>
19 #include <linux/init.h>
20 #include <linux/spinlock.h>
21 #include <linux/slab.h>
22 #include <linux/notifier.h>
23 #include <linux/netdevice.h>
24 #include <linux/netfilter.h>
25 #include <linux/proc_fs.h>
26 #include <linux/netfilter_ipv4.h>
27 #include <linux/netfilter_ipv6.h>
28 #include <linux/netfilter/nfnetlink.h>
29 #include <linux/netfilter/nfnetlink_queue.h>
30 #include <linux/list.h>
31 #include <net/sock.h>
32 #include <net/tcp_states.h>
33 #include <net/netfilter/nf_queue.h>
34 #include <net/netns/generic.h>
35 #include <net/netfilter/nfnetlink_queue.h>
36
37 #include <linux/atomic.h>
38
39 #ifdef CONFIG_BRIDGE_NETFILTER
40 #include "../bridge/br_private.h"
41 #endif
42
43 #define NFQNL_QMAX_DEFAULT 1024
44
45 /* We're using struct nlattr which has 16bit nla_len. Note that nla_len
46 * includes the header length. Thus, the maximum packet length that we
47 * support is 65531 bytes. We send truncated packets if the specified length
48 * is larger than that. Userspace can check for presence of NFQA_CAP_LEN
49 * attribute to detect truncation.
50 */
51 #define NFQNL_MAX_COPY_RANGE (0xffff - NLA_HDRLEN)
52
53 struct nfqnl_instance {
54 struct hlist_node hlist; /* global list of queues */
55 struct rcu_head rcu;
56
57 int peer_portid;
58 unsigned int queue_maxlen;
59 unsigned int copy_range;
60 unsigned int queue_dropped;
61 unsigned int queue_user_dropped;
62
63
64 u_int16_t queue_num; /* number of this queue */
65 u_int8_t copy_mode;
66 u_int32_t flags; /* Set using NFQA_CFG_FLAGS */
67 /*
68 * Following fields are dirtied for each queued packet,
69 * keep them in same cache line if possible.
70 */
71 spinlock_t lock;
72 unsigned int queue_total;
73 unsigned int id_sequence; /* 'sequence' of pkt ids */
74 struct list_head queue_list; /* packets in queue */
75 };
76
77 typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long);
78
79 static int nfnl_queue_net_id __read_mostly;
80
81 #define INSTANCE_BUCKETS 16
82 struct nfnl_queue_net {
83 spinlock_t instances_lock;
84 struct hlist_head instance_table[INSTANCE_BUCKETS];
85 };
86
87 static struct nfnl_queue_net *nfnl_queue_pernet(struct net *net)
88 {
89 return net_generic(net, nfnl_queue_net_id);
90 }
91
92 static inline u_int8_t instance_hashfn(u_int16_t queue_num)
93 {
94 return ((queue_num >> 8) ^ queue_num) % INSTANCE_BUCKETS;
95 }
96
97 static struct nfqnl_instance *
98 instance_lookup(struct nfnl_queue_net *q, u_int16_t queue_num)
99 {
100 struct hlist_head *head;
101 struct nfqnl_instance *inst;
102
103 head = &q->instance_table[instance_hashfn(queue_num)];
104 hlist_for_each_entry_rcu(inst, head, hlist) {
105 if (inst->queue_num == queue_num)
106 return inst;
107 }
108 return NULL;
109 }
110
111 static struct nfqnl_instance *
112 instance_create(struct nfnl_queue_net *q, u_int16_t queue_num,
113 int portid)
114 {
115 struct nfqnl_instance *inst;
116 unsigned int h;
117 int err;
118
119 spin_lock(&q->instances_lock);
120 if (instance_lookup(q, queue_num)) {
121 err = -EEXIST;
122 goto out_unlock;
123 }
124
125 inst = kzalloc(sizeof(*inst), GFP_ATOMIC);
126 if (!inst) {
127 err = -ENOMEM;
128 goto out_unlock;
129 }
130
131 inst->queue_num = queue_num;
132 inst->peer_portid = portid;
133 inst->queue_maxlen = NFQNL_QMAX_DEFAULT;
134 inst->copy_range = NFQNL_MAX_COPY_RANGE;
135 inst->copy_mode = NFQNL_COPY_NONE;
136 spin_lock_init(&inst->lock);
137 INIT_LIST_HEAD(&inst->queue_list);
138
139 if (!try_module_get(THIS_MODULE)) {
140 err = -EAGAIN;
141 goto out_free;
142 }
143
144 h = instance_hashfn(queue_num);
145 hlist_add_head_rcu(&inst->hlist, &q->instance_table[h]);
146
147 spin_unlock(&q->instances_lock);
148
149 return inst;
150
151 out_free:
152 kfree(inst);
153 out_unlock:
154 spin_unlock(&q->instances_lock);
155 return ERR_PTR(err);
156 }
157
158 static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn,
159 unsigned long data);
160
161 static void
162 instance_destroy_rcu(struct rcu_head *head)
163 {
164 struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance,
165 rcu);
166
167 nfqnl_flush(inst, NULL, 0);
168 kfree(inst);
169 module_put(THIS_MODULE);
170 }
171
172 static void
173 __instance_destroy(struct nfqnl_instance *inst)
174 {
175 hlist_del_rcu(&inst->hlist);
176 call_rcu(&inst->rcu, instance_destroy_rcu);
177 }
178
179 static void
180 instance_destroy(struct nfnl_queue_net *q, struct nfqnl_instance *inst)
181 {
182 spin_lock(&q->instances_lock);
183 __instance_destroy(inst);
184 spin_unlock(&q->instances_lock);
185 }
186
187 static inline void
188 __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry)
189 {
190 list_add_tail(&entry->list, &queue->queue_list);
191 queue->queue_total++;
192 }
193
194 static void
195 __dequeue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry)
196 {
197 list_del(&entry->list);
198 queue->queue_total--;
199 }
200
201 static struct nf_queue_entry *
202 find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id)
203 {
204 struct nf_queue_entry *entry = NULL, *i;
205
206 spin_lock_bh(&queue->lock);
207
208 list_for_each_entry(i, &queue->queue_list, list) {
209 if (i->id == id) {
210 entry = i;
211 break;
212 }
213 }
214
215 if (entry)
216 __dequeue_entry(queue, entry);
217
218 spin_unlock_bh(&queue->lock);
219
220 return entry;
221 }
222
223 static void
224 nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data)
225 {
226 struct nf_queue_entry *entry, *next;
227
228 spin_lock_bh(&queue->lock);
229 list_for_each_entry_safe(entry, next, &queue->queue_list, list) {
230 if (!cmpfn || cmpfn(entry, data)) {
231 list_del(&entry->list);
232 queue->queue_total--;
233 nf_reinject(entry, NF_DROP);
234 }
235 }
236 spin_unlock_bh(&queue->lock);
237 }
238
239 static int
240 nfqnl_put_packet_info(struct sk_buff *nlskb, struct sk_buff *packet,
241 bool csum_verify)
242 {
243 __u32 flags = 0;
244
245 if (packet->ip_summed == CHECKSUM_PARTIAL)
246 flags = NFQA_SKB_CSUMNOTREADY;
247 else if (csum_verify)
248 flags = NFQA_SKB_CSUM_NOTVERIFIED;
249
250 if (skb_is_gso(packet))
251 flags |= NFQA_SKB_GSO;
252
253 return flags ? nla_put_be32(nlskb, NFQA_SKB_INFO, htonl(flags)) : 0;
254 }
255
256 static int nfqnl_put_sk_uidgid(struct sk_buff *skb, struct sock *sk)
257 {
258 const struct cred *cred;
259
260 if (sk->sk_state == TCP_TIME_WAIT)
261 return 0;
262
263 read_lock_bh(&sk->sk_callback_lock);
264 if (sk->sk_socket && sk->sk_socket->file) {
265 cred = sk->sk_socket->file->f_cred;
266 if (nla_put_be32(skb, NFQA_UID,
267 htonl(from_kuid_munged(&init_user_ns, cred->fsuid))))
268 goto nla_put_failure;
269 if (nla_put_be32(skb, NFQA_GID,
270 htonl(from_kgid_munged(&init_user_ns, cred->fsgid))))
271 goto nla_put_failure;
272 }
273 read_unlock_bh(&sk->sk_callback_lock);
274 return 0;
275
276 nla_put_failure:
277 read_unlock_bh(&sk->sk_callback_lock);
278 return -1;
279 }
280
281 static struct sk_buff *
282 nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
283 struct nf_queue_entry *entry,
284 __be32 **packet_id_ptr)
285 {
286 size_t size;
287 size_t data_len = 0, cap_len = 0;
288 unsigned int hlen = 0;
289 struct sk_buff *skb;
290 struct nlattr *nla;
291 struct nfqnl_msg_packet_hdr *pmsg;
292 struct nlmsghdr *nlh;
293 struct nfgenmsg *nfmsg;
294 struct sk_buff *entskb = entry->skb;
295 struct net_device *indev;
296 struct net_device *outdev;
297 struct nf_conn *ct = NULL;
298 enum ip_conntrack_info uninitialized_var(ctinfo);
299 bool csum_verify;
300
301 size = nlmsg_total_size(sizeof(struct nfgenmsg))
302 + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr))
303 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
304 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
305 #ifdef CONFIG_BRIDGE_NETFILTER
306 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
307 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
308 #endif
309 + nla_total_size(sizeof(u_int32_t)) /* mark */
310 + nla_total_size(sizeof(struct nfqnl_msg_packet_hw))
311 + nla_total_size(sizeof(u_int32_t)) /* skbinfo */
312 + nla_total_size(sizeof(u_int32_t)); /* cap_len */
313
314 if (entskb->tstamp.tv64)
315 size += nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp));
316
317 if (entry->hook <= NF_INET_FORWARD ||
318 (entry->hook == NF_INET_POST_ROUTING && entskb->sk == NULL))
319 csum_verify = !skb_csum_unnecessary(entskb);
320 else
321 csum_verify = false;
322
323 outdev = entry->outdev;
324
325 switch ((enum nfqnl_config_mode)ACCESS_ONCE(queue->copy_mode)) {
326 case NFQNL_COPY_META:
327 case NFQNL_COPY_NONE:
328 break;
329
330 case NFQNL_COPY_PACKET:
331 if (!(queue->flags & NFQA_CFG_F_GSO) &&
332 entskb->ip_summed == CHECKSUM_PARTIAL &&
333 skb_checksum_help(entskb))
334 return NULL;
335
336 data_len = ACCESS_ONCE(queue->copy_range);
337 if (data_len > entskb->len)
338 data_len = entskb->len;
339
340 hlen = skb_zerocopy_headlen(entskb);
341 hlen = min_t(unsigned int, hlen, data_len);
342 size += sizeof(struct nlattr) + hlen;
343 cap_len = entskb->len;
344 break;
345 }
346
347 if (queue->flags & NFQA_CFG_F_CONNTRACK)
348 ct = nfqnl_ct_get(entskb, &size, &ctinfo);
349
350 if (queue->flags & NFQA_CFG_F_UID_GID) {
351 size += (nla_total_size(sizeof(u_int32_t)) /* uid */
352 + nla_total_size(sizeof(u_int32_t))); /* gid */
353 }
354
355 skb = nfnetlink_alloc_skb(net, size, queue->peer_portid,
356 GFP_ATOMIC);
357 if (!skb)
358 return NULL;
359
360 nlh = nlmsg_put(skb, 0, 0,
361 NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET,
362 sizeof(struct nfgenmsg), 0);
363 if (!nlh) {
364 kfree_skb(skb);
365 return NULL;
366 }
367 nfmsg = nlmsg_data(nlh);
368 nfmsg->nfgen_family = entry->pf;
369 nfmsg->version = NFNETLINK_V0;
370 nfmsg->res_id = htons(queue->queue_num);
371
372 nla = __nla_reserve(skb, NFQA_PACKET_HDR, sizeof(*pmsg));
373 pmsg = nla_data(nla);
374 pmsg->hw_protocol = entskb->protocol;
375 pmsg->hook = entry->hook;
376 *packet_id_ptr = &pmsg->packet_id;
377
378 indev = entry->indev;
379 if (indev) {
380 #ifndef CONFIG_BRIDGE_NETFILTER
381 if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, htonl(indev->ifindex)))
382 goto nla_put_failure;
383 #else
384 if (entry->pf == PF_BRIDGE) {
385 /* Case 1: indev is physical input device, we need to
386 * look for bridge group (when called from
387 * netfilter_bridge) */
388 if (nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV,
389 htonl(indev->ifindex)) ||
390 /* this is the bridge group "brX" */
391 /* rcu_read_lock()ed by __nf_queue */
392 nla_put_be32(skb, NFQA_IFINDEX_INDEV,
393 htonl(br_port_get_rcu(indev)->br->dev->ifindex)))
394 goto nla_put_failure;
395 } else {
396 /* Case 2: indev is bridge group, we need to look for
397 * physical device (when called from ipv4) */
398 if (nla_put_be32(skb, NFQA_IFINDEX_INDEV,
399 htonl(indev->ifindex)))
400 goto nla_put_failure;
401 if (entskb->nf_bridge && entskb->nf_bridge->physindev &&
402 nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV,
403 htonl(entskb->nf_bridge->physindev->ifindex)))
404 goto nla_put_failure;
405 }
406 #endif
407 }
408
409 if (outdev) {
410 #ifndef CONFIG_BRIDGE_NETFILTER
411 if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, htonl(outdev->ifindex)))
412 goto nla_put_failure;
413 #else
414 if (entry->pf == PF_BRIDGE) {
415 /* Case 1: outdev is physical output device, we need to
416 * look for bridge group (when called from
417 * netfilter_bridge) */
418 if (nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV,
419 htonl(outdev->ifindex)) ||
420 /* this is the bridge group "brX" */
421 /* rcu_read_lock()ed by __nf_queue */
422 nla_put_be32(skb, NFQA_IFINDEX_OUTDEV,
423 htonl(br_port_get_rcu(outdev)->br->dev->ifindex)))
424 goto nla_put_failure;
425 } else {
426 /* Case 2: outdev is bridge group, we need to look for
427 * physical output device (when called from ipv4) */
428 if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV,
429 htonl(outdev->ifindex)))
430 goto nla_put_failure;
431 if (entskb->nf_bridge && entskb->nf_bridge->physoutdev &&
432 nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV,
433 htonl(entskb->nf_bridge->physoutdev->ifindex)))
434 goto nla_put_failure;
435 }
436 #endif
437 }
438
439 if (entskb->mark &&
440 nla_put_be32(skb, NFQA_MARK, htonl(entskb->mark)))
441 goto nla_put_failure;
442
443 if (indev && entskb->dev &&
444 entskb->mac_header != entskb->network_header) {
445 struct nfqnl_msg_packet_hw phw;
446 int len;
447
448 memset(&phw, 0, sizeof(phw));
449 len = dev_parse_header(entskb, phw.hw_addr);
450 if (len) {
451 phw.hw_addrlen = htons(len);
452 if (nla_put(skb, NFQA_HWADDR, sizeof(phw), &phw))
453 goto nla_put_failure;
454 }
455 }
456
457 if (entskb->tstamp.tv64) {
458 struct nfqnl_msg_packet_timestamp ts;
459 struct timeval tv = ktime_to_timeval(entskb->tstamp);
460 ts.sec = cpu_to_be64(tv.tv_sec);
461 ts.usec = cpu_to_be64(tv.tv_usec);
462
463 if (nla_put(skb, NFQA_TIMESTAMP, sizeof(ts), &ts))
464 goto nla_put_failure;
465 }
466
467 if ((queue->flags & NFQA_CFG_F_UID_GID) && entskb->sk &&
468 nfqnl_put_sk_uidgid(skb, entskb->sk) < 0)
469 goto nla_put_failure;
470
471 if (ct && nfqnl_ct_put(skb, ct, ctinfo) < 0)
472 goto nla_put_failure;
473
474 if (cap_len > data_len &&
475 nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len)))
476 goto nla_put_failure;
477
478 if (nfqnl_put_packet_info(skb, entskb, csum_verify))
479 goto nla_put_failure;
480
481 if (data_len) {
482 struct nlattr *nla;
483
484 if (skb_tailroom(skb) < sizeof(*nla) + hlen)
485 goto nla_put_failure;
486
487 nla = (struct nlattr *)skb_put(skb, sizeof(*nla));
488 nla->nla_type = NFQA_PAYLOAD;
489 nla->nla_len = nla_attr_size(data_len);
490
491 skb_zerocopy(skb, entskb, data_len, hlen);
492 }
493
494 nlh->nlmsg_len = skb->len;
495 return skb;
496
497 nla_put_failure:
498 kfree_skb(skb);
499 net_err_ratelimited("nf_queue: error creating packet message\n");
500 return NULL;
501 }
502
503 static int
504 __nfqnl_enqueue_packet(struct net *net, struct nfqnl_instance *queue,
505 struct nf_queue_entry *entry)
506 {
507 struct sk_buff *nskb;
508 int err = -ENOBUFS;
509 __be32 *packet_id_ptr;
510 int failopen = 0;
511
512 nskb = nfqnl_build_packet_message(net, queue, entry, &packet_id_ptr);
513 if (nskb == NULL) {
514 err = -ENOMEM;
515 goto err_out;
516 }
517 spin_lock_bh(&queue->lock);
518
519 if (queue->queue_total >= queue->queue_maxlen) {
520 if (queue->flags & NFQA_CFG_F_FAIL_OPEN) {
521 failopen = 1;
522 err = 0;
523 } else {
524 queue->queue_dropped++;
525 net_warn_ratelimited("nf_queue: full at %d entries, dropping packets(s)\n",
526 queue->queue_total);
527 }
528 goto err_out_free_nskb;
529 }
530 entry->id = ++queue->id_sequence;
531 *packet_id_ptr = htonl(entry->id);
532
533 /* nfnetlink_unicast will either free the nskb or add it to a socket */
534 err = nfnetlink_unicast(nskb, net, queue->peer_portid, MSG_DONTWAIT);
535 if (err < 0) {
536 queue->queue_user_dropped++;
537 goto err_out_unlock;
538 }
539
540 __enqueue_entry(queue, entry);
541
542 spin_unlock_bh(&queue->lock);
543 return 0;
544
545 err_out_free_nskb:
546 kfree_skb(nskb);
547 err_out_unlock:
548 spin_unlock_bh(&queue->lock);
549 if (failopen)
550 nf_reinject(entry, NF_ACCEPT);
551 err_out:
552 return err;
553 }
554
555 static struct nf_queue_entry *
556 nf_queue_entry_dup(struct nf_queue_entry *e)
557 {
558 struct nf_queue_entry *entry = kmemdup(e, e->size, GFP_ATOMIC);
559 if (entry) {
560 if (nf_queue_entry_get_refs(entry))
561 return entry;
562 kfree(entry);
563 }
564 return NULL;
565 }
566
567 #ifdef CONFIG_BRIDGE_NETFILTER
568 /* When called from bridge netfilter, skb->data must point to MAC header
569 * before calling skb_gso_segment(). Else, original MAC header is lost
570 * and segmented skbs will be sent to wrong destination.
571 */
572 static void nf_bridge_adjust_skb_data(struct sk_buff *skb)
573 {
574 if (skb->nf_bridge)
575 __skb_push(skb, skb->network_header - skb->mac_header);
576 }
577
578 static void nf_bridge_adjust_segmented_data(struct sk_buff *skb)
579 {
580 if (skb->nf_bridge)
581 __skb_pull(skb, skb->network_header - skb->mac_header);
582 }
583 #else
584 #define nf_bridge_adjust_skb_data(s) do {} while (0)
585 #define nf_bridge_adjust_segmented_data(s) do {} while (0)
586 #endif
587
588 static void free_entry(struct nf_queue_entry *entry)
589 {
590 nf_queue_entry_release_refs(entry);
591 kfree(entry);
592 }
593
594 static int
595 __nfqnl_enqueue_packet_gso(struct net *net, struct nfqnl_instance *queue,
596 struct sk_buff *skb, struct nf_queue_entry *entry)
597 {
598 int ret = -ENOMEM;
599 struct nf_queue_entry *entry_seg;
600
601 nf_bridge_adjust_segmented_data(skb);
602
603 if (skb->next == NULL) { /* last packet, no need to copy entry */
604 struct sk_buff *gso_skb = entry->skb;
605 entry->skb = skb;
606 ret = __nfqnl_enqueue_packet(net, queue, entry);
607 if (ret)
608 entry->skb = gso_skb;
609 return ret;
610 }
611
612 skb->next = NULL;
613
614 entry_seg = nf_queue_entry_dup(entry);
615 if (entry_seg) {
616 entry_seg->skb = skb;
617 ret = __nfqnl_enqueue_packet(net, queue, entry_seg);
618 if (ret)
619 free_entry(entry_seg);
620 }
621 return ret;
622 }
623
624 static int
625 nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
626 {
627 unsigned int queued;
628 struct nfqnl_instance *queue;
629 struct sk_buff *skb, *segs;
630 int err = -ENOBUFS;
631 struct net *net = dev_net(entry->indev ?
632 entry->indev : entry->outdev);
633 struct nfnl_queue_net *q = nfnl_queue_pernet(net);
634
635 /* rcu_read_lock()ed by nf_hook_slow() */
636 queue = instance_lookup(q, queuenum);
637 if (!queue)
638 return -ESRCH;
639
640 if (queue->copy_mode == NFQNL_COPY_NONE)
641 return -EINVAL;
642
643 skb = entry->skb;
644
645 switch (entry->pf) {
646 case NFPROTO_IPV4:
647 skb->protocol = htons(ETH_P_IP);
648 break;
649 case NFPROTO_IPV6:
650 skb->protocol = htons(ETH_P_IPV6);
651 break;
652 }
653
654 if ((queue->flags & NFQA_CFG_F_GSO) || !skb_is_gso(skb))
655 return __nfqnl_enqueue_packet(net, queue, entry);
656
657 nf_bridge_adjust_skb_data(skb);
658 segs = skb_gso_segment(skb, 0);
659 /* Does not use PTR_ERR to limit the number of error codes that can be
660 * returned by nf_queue. For instance, callers rely on -ECANCELED to
661 * mean 'ignore this hook'.
662 */
663 if (IS_ERR(segs))
664 goto out_err;
665 queued = 0;
666 err = 0;
667 do {
668 struct sk_buff *nskb = segs->next;
669 if (err == 0)
670 err = __nfqnl_enqueue_packet_gso(net, queue,
671 segs, entry);
672 if (err == 0)
673 queued++;
674 else
675 kfree_skb(segs);
676 segs = nskb;
677 } while (segs);
678
679 if (queued) {
680 if (err) /* some segments are already queued */
681 free_entry(entry);
682 kfree_skb(skb);
683 return 0;
684 }
685 out_err:
686 nf_bridge_adjust_segmented_data(skb);
687 return err;
688 }
689
690 static int
691 nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e, int diff)
692 {
693 struct sk_buff *nskb;
694
695 if (diff < 0) {
696 if (pskb_trim(e->skb, data_len))
697 return -ENOMEM;
698 } else if (diff > 0) {
699 if (data_len > 0xFFFF)
700 return -EINVAL;
701 if (diff > skb_tailroom(e->skb)) {
702 nskb = skb_copy_expand(e->skb, skb_headroom(e->skb),
703 diff, GFP_ATOMIC);
704 if (!nskb) {
705 printk(KERN_WARNING "nf_queue: OOM "
706 "in mangle, dropping packet\n");
707 return -ENOMEM;
708 }
709 kfree_skb(e->skb);
710 e->skb = nskb;
711 }
712 skb_put(e->skb, diff);
713 }
714 if (!skb_make_writable(e->skb, data_len))
715 return -ENOMEM;
716 skb_copy_to_linear_data(e->skb, data, data_len);
717 e->skb->ip_summed = CHECKSUM_NONE;
718 return 0;
719 }
720
721 static int
722 nfqnl_set_mode(struct nfqnl_instance *queue,
723 unsigned char mode, unsigned int range)
724 {
725 int status = 0;
726
727 spin_lock_bh(&queue->lock);
728 switch (mode) {
729 case NFQNL_COPY_NONE:
730 case NFQNL_COPY_META:
731 queue->copy_mode = mode;
732 queue->copy_range = 0;
733 break;
734
735 case NFQNL_COPY_PACKET:
736 queue->copy_mode = mode;
737 if (range == 0 || range > NFQNL_MAX_COPY_RANGE)
738 queue->copy_range = NFQNL_MAX_COPY_RANGE;
739 else
740 queue->copy_range = range;
741 break;
742
743 default:
744 status = -EINVAL;
745
746 }
747 spin_unlock_bh(&queue->lock);
748
749 return status;
750 }
751
752 static int
753 dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex)
754 {
755 if (entry->indev)
756 if (entry->indev->ifindex == ifindex)
757 return 1;
758 if (entry->outdev)
759 if (entry->outdev->ifindex == ifindex)
760 return 1;
761 #ifdef CONFIG_BRIDGE_NETFILTER
762 if (entry->skb->nf_bridge) {
763 if (entry->skb->nf_bridge->physindev &&
764 entry->skb->nf_bridge->physindev->ifindex == ifindex)
765 return 1;
766 if (entry->skb->nf_bridge->physoutdev &&
767 entry->skb->nf_bridge->physoutdev->ifindex == ifindex)
768 return 1;
769 }
770 #endif
771 return 0;
772 }
773
774 /* drop all packets with either indev or outdev == ifindex from all queue
775 * instances */
776 static void
777 nfqnl_dev_drop(struct net *net, int ifindex)
778 {
779 int i;
780 struct nfnl_queue_net *q = nfnl_queue_pernet(net);
781
782 rcu_read_lock();
783
784 for (i = 0; i < INSTANCE_BUCKETS; i++) {
785 struct nfqnl_instance *inst;
786 struct hlist_head *head = &q->instance_table[i];
787
788 hlist_for_each_entry_rcu(inst, head, hlist)
789 nfqnl_flush(inst, dev_cmp, ifindex);
790 }
791
792 rcu_read_unlock();
793 }
794
795 #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0)
796
797 static int
798 nfqnl_rcv_dev_event(struct notifier_block *this,
799 unsigned long event, void *ptr)
800 {
801 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
802
803 /* Drop any packets associated with the downed device */
804 if (event == NETDEV_DOWN)
805 nfqnl_dev_drop(dev_net(dev), dev->ifindex);
806 return NOTIFY_DONE;
807 }
808
809 static struct notifier_block nfqnl_dev_notifier = {
810 .notifier_call = nfqnl_rcv_dev_event,
811 };
812
813 static int
814 nfqnl_rcv_nl_event(struct notifier_block *this,
815 unsigned long event, void *ptr)
816 {
817 struct netlink_notify *n = ptr;
818 struct nfnl_queue_net *q = nfnl_queue_pernet(n->net);
819
820 if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) {
821 int i;
822
823 /* destroy all instances for this portid */
824 spin_lock(&q->instances_lock);
825 for (i = 0; i < INSTANCE_BUCKETS; i++) {
826 struct hlist_node *t2;
827 struct nfqnl_instance *inst;
828 struct hlist_head *head = &q->instance_table[i];
829
830 hlist_for_each_entry_safe(inst, t2, head, hlist) {
831 if (n->portid == inst->peer_portid)
832 __instance_destroy(inst);
833 }
834 }
835 spin_unlock(&q->instances_lock);
836 }
837 return NOTIFY_DONE;
838 }
839
840 static struct notifier_block nfqnl_rtnl_notifier = {
841 .notifier_call = nfqnl_rcv_nl_event,
842 };
843
844 static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = {
845 [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
846 [NFQA_MARK] = { .type = NLA_U32 },
847 [NFQA_PAYLOAD] = { .type = NLA_UNSPEC },
848 [NFQA_CT] = { .type = NLA_UNSPEC },
849 [NFQA_EXP] = { .type = NLA_UNSPEC },
850 };
851
852 static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = {
853 [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
854 [NFQA_MARK] = { .type = NLA_U32 },
855 };
856
857 static struct nfqnl_instance *
858 verdict_instance_lookup(struct nfnl_queue_net *q, u16 queue_num, int nlportid)
859 {
860 struct nfqnl_instance *queue;
861
862 queue = instance_lookup(q, queue_num);
863 if (!queue)
864 return ERR_PTR(-ENODEV);
865
866 if (queue->peer_portid != nlportid)
867 return ERR_PTR(-EPERM);
868
869 return queue;
870 }
871
872 static struct nfqnl_msg_verdict_hdr*
873 verdicthdr_get(const struct nlattr * const nfqa[])
874 {
875 struct nfqnl_msg_verdict_hdr *vhdr;
876 unsigned int verdict;
877
878 if (!nfqa[NFQA_VERDICT_HDR])
879 return NULL;
880
881 vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]);
882 verdict = ntohl(vhdr->verdict) & NF_VERDICT_MASK;
883 if (verdict > NF_MAX_VERDICT || verdict == NF_STOLEN)
884 return NULL;
885 return vhdr;
886 }
887
888 static int nfq_id_after(unsigned int id, unsigned int max)
889 {
890 return (int)(id - max) > 0;
891 }
892
893 static int
894 nfqnl_recv_verdict_batch(struct sock *ctnl, struct sk_buff *skb,
895 const struct nlmsghdr *nlh,
896 const struct nlattr * const nfqa[])
897 {
898 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
899 struct nf_queue_entry *entry, *tmp;
900 unsigned int verdict, maxid;
901 struct nfqnl_msg_verdict_hdr *vhdr;
902 struct nfqnl_instance *queue;
903 LIST_HEAD(batch_list);
904 u16 queue_num = ntohs(nfmsg->res_id);
905
906 struct net *net = sock_net(ctnl);
907 struct nfnl_queue_net *q = nfnl_queue_pernet(net);
908
909 queue = verdict_instance_lookup(q, queue_num,
910 NETLINK_CB(skb).portid);
911 if (IS_ERR(queue))
912 return PTR_ERR(queue);
913
914 vhdr = verdicthdr_get(nfqa);
915 if (!vhdr)
916 return -EINVAL;
917
918 verdict = ntohl(vhdr->verdict);
919 maxid = ntohl(vhdr->id);
920
921 spin_lock_bh(&queue->lock);
922
923 list_for_each_entry_safe(entry, tmp, &queue->queue_list, list) {
924 if (nfq_id_after(entry->id, maxid))
925 break;
926 __dequeue_entry(queue, entry);
927 list_add_tail(&entry->list, &batch_list);
928 }
929
930 spin_unlock_bh(&queue->lock);
931
932 if (list_empty(&batch_list))
933 return -ENOENT;
934
935 list_for_each_entry_safe(entry, tmp, &batch_list, list) {
936 if (nfqa[NFQA_MARK])
937 entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
938 nf_reinject(entry, verdict);
939 }
940 return 0;
941 }
942
943 static int
944 nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
945 const struct nlmsghdr *nlh,
946 const struct nlattr * const nfqa[])
947 {
948 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
949 u_int16_t queue_num = ntohs(nfmsg->res_id);
950
951 struct nfqnl_msg_verdict_hdr *vhdr;
952 struct nfqnl_instance *queue;
953 unsigned int verdict;
954 struct nf_queue_entry *entry;
955 enum ip_conntrack_info uninitialized_var(ctinfo);
956 struct nf_conn *ct = NULL;
957
958 struct net *net = sock_net(ctnl);
959 struct nfnl_queue_net *q = nfnl_queue_pernet(net);
960
961 queue = instance_lookup(q, queue_num);
962 if (!queue)
963 queue = verdict_instance_lookup(q, queue_num,
964 NETLINK_CB(skb).portid);
965 if (IS_ERR(queue))
966 return PTR_ERR(queue);
967
968 vhdr = verdicthdr_get(nfqa);
969 if (!vhdr)
970 return -EINVAL;
971
972 verdict = ntohl(vhdr->verdict);
973
974 entry = find_dequeue_entry(queue, ntohl(vhdr->id));
975 if (entry == NULL)
976 return -ENOENT;
977
978 if (nfqa[NFQA_CT]) {
979 ct = nfqnl_ct_parse(entry->skb, nfqa[NFQA_CT], &ctinfo);
980 if (ct && nfqa[NFQA_EXP]) {
981 nfqnl_attach_expect(ct, nfqa[NFQA_EXP],
982 NETLINK_CB(skb).portid,
983 nlmsg_report(nlh));
984 }
985 }
986
987 if (nfqa[NFQA_PAYLOAD]) {
988 u16 payload_len = nla_len(nfqa[NFQA_PAYLOAD]);
989 int diff = payload_len - entry->skb->len;
990
991 if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]),
992 payload_len, entry, diff) < 0)
993 verdict = NF_DROP;
994
995 if (ct)
996 nfqnl_ct_seq_adjust(entry->skb, ct, ctinfo, diff);
997 }
998
999 if (nfqa[NFQA_MARK])
1000 entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
1001
1002 nf_reinject(entry, verdict);
1003 return 0;
1004 }
1005
1006 static int
1007 nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
1008 const struct nlmsghdr *nlh,
1009 const struct nlattr * const nfqa[])
1010 {
1011 return -ENOTSUPP;
1012 }
1013
1014 static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = {
1015 [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) },
1016 [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) },
1017 };
1018
1019 static const struct nf_queue_handler nfqh = {
1020 .outfn = &nfqnl_enqueue_packet,
1021 };
1022
1023 static int
1024 nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
1025 const struct nlmsghdr *nlh,
1026 const struct nlattr * const nfqa[])
1027 {
1028 struct nfgenmsg *nfmsg = nlmsg_data(nlh);
1029 u_int16_t queue_num = ntohs(nfmsg->res_id);
1030 struct nfqnl_instance *queue;
1031 struct nfqnl_msg_config_cmd *cmd = NULL;
1032 struct net *net = sock_net(ctnl);
1033 struct nfnl_queue_net *q = nfnl_queue_pernet(net);
1034 int ret = 0;
1035
1036 if (nfqa[NFQA_CFG_CMD]) {
1037 cmd = nla_data(nfqa[NFQA_CFG_CMD]);
1038
1039 /* Obsolete commands without queue context */
1040 switch (cmd->command) {
1041 case NFQNL_CFG_CMD_PF_BIND: return 0;
1042 case NFQNL_CFG_CMD_PF_UNBIND: return 0;
1043 }
1044 }
1045
1046 rcu_read_lock();
1047 queue = instance_lookup(q, queue_num);
1048 if (queue && queue->peer_portid != NETLINK_CB(skb).portid) {
1049 ret = -EPERM;
1050 goto err_out_unlock;
1051 }
1052
1053 if (cmd != NULL) {
1054 switch (cmd->command) {
1055 case NFQNL_CFG_CMD_BIND:
1056 if (queue) {
1057 ret = -EBUSY;
1058 goto err_out_unlock;
1059 }
1060 queue = instance_create(q, queue_num,
1061 NETLINK_CB(skb).portid);
1062 if (IS_ERR(queue)) {
1063 ret = PTR_ERR(queue);
1064 goto err_out_unlock;
1065 }
1066 break;
1067 case NFQNL_CFG_CMD_UNBIND:
1068 if (!queue) {
1069 ret = -ENODEV;
1070 goto err_out_unlock;
1071 }
1072 instance_destroy(q, queue);
1073 break;
1074 case NFQNL_CFG_CMD_PF_BIND:
1075 case NFQNL_CFG_CMD_PF_UNBIND:
1076 break;
1077 default:
1078 ret = -ENOTSUPP;
1079 break;
1080 }
1081 }
1082
1083 if (nfqa[NFQA_CFG_PARAMS]) {
1084 struct nfqnl_msg_config_params *params;
1085
1086 if (!queue) {
1087 ret = -ENODEV;
1088 goto err_out_unlock;
1089 }
1090 params = nla_data(nfqa[NFQA_CFG_PARAMS]);
1091 nfqnl_set_mode(queue, params->copy_mode,
1092 ntohl(params->copy_range));
1093 }
1094
1095 if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) {
1096 __be32 *queue_maxlen;
1097
1098 if (!queue) {
1099 ret = -ENODEV;
1100 goto err_out_unlock;
1101 }
1102 queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]);
1103 spin_lock_bh(&queue->lock);
1104 queue->queue_maxlen = ntohl(*queue_maxlen);
1105 spin_unlock_bh(&queue->lock);
1106 }
1107
1108 if (nfqa[NFQA_CFG_FLAGS]) {
1109 __u32 flags, mask;
1110
1111 if (!queue) {
1112 ret = -ENODEV;
1113 goto err_out_unlock;
1114 }
1115
1116 if (!nfqa[NFQA_CFG_MASK]) {
1117 /* A mask is needed to specify which flags are being
1118 * changed.
1119 */
1120 ret = -EINVAL;
1121 goto err_out_unlock;
1122 }
1123
1124 flags = ntohl(nla_get_be32(nfqa[NFQA_CFG_FLAGS]));
1125 mask = ntohl(nla_get_be32(nfqa[NFQA_CFG_MASK]));
1126
1127 if (flags >= NFQA_CFG_F_MAX) {
1128 ret = -EOPNOTSUPP;
1129 goto err_out_unlock;
1130 }
1131
1132 spin_lock_bh(&queue->lock);
1133 queue->flags &= ~mask;
1134 queue->flags |= flags & mask;
1135 spin_unlock_bh(&queue->lock);
1136 }
1137
1138 err_out_unlock:
1139 rcu_read_unlock();
1140 return ret;
1141 }
1142
1143 static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = {
1144 [NFQNL_MSG_PACKET] = { .call_rcu = nfqnl_recv_unsupp,
1145 .attr_count = NFQA_MAX, },
1146 [NFQNL_MSG_VERDICT] = { .call_rcu = nfqnl_recv_verdict,
1147 .attr_count = NFQA_MAX,
1148 .policy = nfqa_verdict_policy },
1149 [NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config,
1150 .attr_count = NFQA_CFG_MAX,
1151 .policy = nfqa_cfg_policy },
1152 [NFQNL_MSG_VERDICT_BATCH]={ .call_rcu = nfqnl_recv_verdict_batch,
1153 .attr_count = NFQA_MAX,
1154 .policy = nfqa_verdict_batch_policy },
1155 };
1156
1157 static const struct nfnetlink_subsystem nfqnl_subsys = {
1158 .name = "nf_queue",
1159 .subsys_id = NFNL_SUBSYS_QUEUE,
1160 .cb_count = NFQNL_MSG_MAX,
1161 .cb = nfqnl_cb,
1162 };
1163
1164 #ifdef CONFIG_PROC_FS
1165 struct iter_state {
1166 struct seq_net_private p;
1167 unsigned int bucket;
1168 };
1169
1170 static struct hlist_node *get_first(struct seq_file *seq)
1171 {
1172 struct iter_state *st = seq->private;
1173 struct net *net;
1174 struct nfnl_queue_net *q;
1175
1176 if (!st)
1177 return NULL;
1178
1179 net = seq_file_net(seq);
1180 q = nfnl_queue_pernet(net);
1181 for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) {
1182 if (!hlist_empty(&q->instance_table[st->bucket]))
1183 return q->instance_table[st->bucket].first;
1184 }
1185 return NULL;
1186 }
1187
1188 static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h)
1189 {
1190 struct iter_state *st = seq->private;
1191 struct net *net = seq_file_net(seq);
1192
1193 h = h->next;
1194 while (!h) {
1195 struct nfnl_queue_net *q;
1196
1197 if (++st->bucket >= INSTANCE_BUCKETS)
1198 return NULL;
1199
1200 q = nfnl_queue_pernet(net);
1201 h = q->instance_table[st->bucket].first;
1202 }
1203 return h;
1204 }
1205
1206 static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos)
1207 {
1208 struct hlist_node *head;
1209 head = get_first(seq);
1210
1211 if (head)
1212 while (pos && (head = get_next(seq, head)))
1213 pos--;
1214 return pos ? NULL : head;
1215 }
1216
1217 static void *seq_start(struct seq_file *s, loff_t *pos)
1218 __acquires(nfnl_queue_pernet(seq_file_net(s))->instances_lock)
1219 {
1220 spin_lock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock);
1221 return get_idx(s, *pos);
1222 }
1223
1224 static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
1225 {
1226 (*pos)++;
1227 return get_next(s, v);
1228 }
1229
1230 static void seq_stop(struct seq_file *s, void *v)
1231 __releases(nfnl_queue_pernet(seq_file_net(s))->instances_lock)
1232 {
1233 spin_unlock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock);
1234 }
1235
1236 static int seq_show(struct seq_file *s, void *v)
1237 {
1238 const struct nfqnl_instance *inst = v;
1239
1240 return seq_printf(s, "%5d %6d %5d %1d %5d %5d %5d %8d %2d\n",
1241 inst->queue_num,
1242 inst->peer_portid, inst->queue_total,
1243 inst->copy_mode, inst->copy_range,
1244 inst->queue_dropped, inst->queue_user_dropped,
1245 inst->id_sequence, 1);
1246 }
1247
1248 static const struct seq_operations nfqnl_seq_ops = {
1249 .start = seq_start,
1250 .next = seq_next,
1251 .stop = seq_stop,
1252 .show = seq_show,
1253 };
1254
1255 static int nfqnl_open(struct inode *inode, struct file *file)
1256 {
1257 return seq_open_net(inode, file, &nfqnl_seq_ops,
1258 sizeof(struct iter_state));
1259 }
1260
1261 static const struct file_operations nfqnl_file_ops = {
1262 .owner = THIS_MODULE,
1263 .open = nfqnl_open,
1264 .read = seq_read,
1265 .llseek = seq_lseek,
1266 .release = seq_release_net,
1267 };
1268
1269 #endif /* PROC_FS */
1270
1271 static int __net_init nfnl_queue_net_init(struct net *net)
1272 {
1273 unsigned int i;
1274 struct nfnl_queue_net *q = nfnl_queue_pernet(net);
1275
1276 for (i = 0; i < INSTANCE_BUCKETS; i++)
1277 INIT_HLIST_HEAD(&q->instance_table[i]);
1278
1279 spin_lock_init(&q->instances_lock);
1280
1281 #ifdef CONFIG_PROC_FS
1282 if (!proc_create("nfnetlink_queue", 0440,
1283 net->nf.proc_netfilter, &nfqnl_file_ops))
1284 return -ENOMEM;
1285 #endif
1286 return 0;
1287 }
1288
1289 static void __net_exit nfnl_queue_net_exit(struct net *net)
1290 {
1291 #ifdef CONFIG_PROC_FS
1292 remove_proc_entry("nfnetlink_queue", net->nf.proc_netfilter);
1293 #endif
1294 }
1295
1296 static struct pernet_operations nfnl_queue_net_ops = {
1297 .init = nfnl_queue_net_init,
1298 .exit = nfnl_queue_net_exit,
1299 .id = &nfnl_queue_net_id,
1300 .size = sizeof(struct nfnl_queue_net),
1301 };
1302
1303 static int __init nfnetlink_queue_init(void)
1304 {
1305 int status = -ENOMEM;
1306
1307 netlink_register_notifier(&nfqnl_rtnl_notifier);
1308 status = nfnetlink_subsys_register(&nfqnl_subsys);
1309 if (status < 0) {
1310 pr_err("nf_queue: failed to create netlink socket\n");
1311 goto cleanup_netlink_notifier;
1312 }
1313
1314 status = register_pernet_subsys(&nfnl_queue_net_ops);
1315 if (status < 0) {
1316 pr_err("nf_queue: failed to register pernet ops\n");
1317 goto cleanup_subsys;
1318 }
1319 register_netdevice_notifier(&nfqnl_dev_notifier);
1320 nf_register_queue_handler(&nfqh);
1321 return status;
1322
1323 cleanup_subsys:
1324 nfnetlink_subsys_unregister(&nfqnl_subsys);
1325 cleanup_netlink_notifier:
1326 netlink_unregister_notifier(&nfqnl_rtnl_notifier);
1327 return status;
1328 }
1329
1330 static void __exit nfnetlink_queue_fini(void)
1331 {
1332 nf_unregister_queue_handler();
1333 unregister_netdevice_notifier(&nfqnl_dev_notifier);
1334 unregister_pernet_subsys(&nfnl_queue_net_ops);
1335 nfnetlink_subsys_unregister(&nfqnl_subsys);
1336 netlink_unregister_notifier(&nfqnl_rtnl_notifier);
1337
1338 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1339 }
1340
1341 MODULE_DESCRIPTION("netfilter packet queue handler");
1342 MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
1343 MODULE_LICENSE("GPL");
1344 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE);
1345
1346 module_init(nfnetlink_queue_init);
1347 module_exit(nfnetlink_queue_fini);
Linux kernel - Deliverables
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