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[openwrt.git] / target / linux / generic-2.6 / patches-2.6.27 / 150-netfilter_imq.patch
1 --- /dev/null
2 +++ b/drivers/net/imq.c
3 @@ -0,0 +1,566 @@
4 +/*
5 + * Pseudo-driver for the intermediate queue device.
6 + *
7 + * This program is free software; you can redistribute it and/or
8 + * modify it under the terms of the GNU General Public License
9 + * as published by the Free Software Foundation; either version
10 + * 2 of the License, or (at your option) any later version.
11 + *
12 + * Authors: Patrick McHardy, <kaber@trash.net>
13 + *
14 + * The first version was written by Martin Devera, <devik@cdi.cz>
15 + *
16 + * Credits: Jan Rafaj <imq2t@cedric.vabo.cz>
17 + * - Update patch to 2.4.21
18 + * Sebastian Strollo <sstrollo@nortelnetworks.com>
19 + * - Fix "Dead-loop on netdevice imq"-issue
20 + * Marcel Sebek <sebek64@post.cz>
21 + * - Update to 2.6.2-rc1
22 + *
23 + * After some time of inactivity there is a group taking care
24 + * of IMQ again: http://www.linuximq.net
25 + *
26 + *
27 + * 2004/06/30 - New version of IMQ patch to kernels <=2.6.7
28 + * including the following changes:
29 + *
30 + * - Correction of ipv6 support "+"s issue (Hasso Tepper)
31 + * - Correction of imq_init_devs() issue that resulted in
32 + * kernel OOPS unloading IMQ as module (Norbert Buchmuller)
33 + * - Addition of functionality to choose number of IMQ devices
34 + * during kernel config (Andre Correa)
35 + * - Addition of functionality to choose how IMQ hooks on
36 + * PRE and POSTROUTING (after or before NAT) (Andre Correa)
37 + * - Cosmetic corrections (Norbert Buchmuller) (Andre Correa)
38 + *
39 + *
40 + * 2005/12/16 - IMQ versions between 2.6.7 and 2.6.13 were
41 + * released with almost no problems. 2.6.14-x was released
42 + * with some important changes: nfcache was removed; After
43 + * some weeks of trouble we figured out that some IMQ fields
44 + * in skb were missing in skbuff.c - skb_clone and copy_skb_header.
45 + * These functions are correctly patched by this new patch version.
46 + *
47 + * Thanks for all who helped to figure out all the problems with
48 + * 2.6.14.x: Patrick McHardy, Rune Kock, VeNoMouS, Max CtRiX,
49 + * Kevin Shanahan, Richard Lucassen, Valery Dachev (hopefully
50 + * I didn't forget anybody). I apologize again for my lack of time.
51 + *
52 + *
53 + * 2008/06/17 - 2.6.25 - Changed imq.c to use qdisc_run() instead
54 + * of qdisc_restart() and moved qdisc_run() to tasklet to avoid
55 + * recursive locking. New initialization routines to fix 'rmmod' not
56 + * working anymore. Used code from ifb.c. (Jussi Kivilinna)
57 + *
58 + * 2008/08/06 - 2.6.26 - (JK)
59 + * - Replaced tasklet with 'netif_schedule()'.
60 + * - Cleaned up and added comments for imq_nf_queue().
61 + *
62 + * 2009/04/12
63 + * - Add skb_save_cb/skb_restore_cb helper functions for backuping
64 + * control buffer. This is needed because qdisc-layer on kernels
65 + * 2.6.27 and newer overwrite control buffer. (Jussi Kivilinna)
66 + * - Add better locking for IMQ device. Hopefully this will solve
67 + * SMP issues. (Jussi Kivilinna)
68 + * - Port to 2.6.27
69 + *
70 + * 2009/04/20 - (Jussi Kivilinna)
71 + * - Fix rmmod not working
72 + * - Use netdevice feature flags to avoid extra packet handling
73 + * by core networking layer and possibly increase performance.
74 + *
75 + * Also, many thanks to pablo Sebastian Greco for making the initial
76 + * patch and to those who helped the testing.
77 + *
78 + * More info at: http://www.linuximq.net/ (Andre Correa)
79 + */
80 +
81 +#include <linux/module.h>
82 +#include <linux/kernel.h>
83 +#include <linux/moduleparam.h>
84 +#include <linux/list.h>
85 +#include <linux/skbuff.h>
86 +#include <linux/netdevice.h>
87 +#include <linux/etherdevice.h>
88 +#include <linux/rtnetlink.h>
89 +#include <linux/if_arp.h>
90 +#include <linux/netfilter.h>
91 +#include <linux/netfilter_ipv4.h>
92 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
93 + #include <linux/netfilter_ipv6.h>
94 +#endif
95 +#include <linux/imq.h>
96 +#include <net/pkt_sched.h>
97 +#include <net/netfilter/nf_queue.h>
98 +
99 +static nf_hookfn imq_nf_hook;
100 +
101 +static struct nf_hook_ops imq_ingress_ipv4 = {
102 + .hook = imq_nf_hook,
103 + .owner = THIS_MODULE,
104 + .pf = PF_INET,
105 + .hooknum = NF_INET_PRE_ROUTING,
106 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
107 + .priority = NF_IP_PRI_MANGLE + 1
108 +#else
109 + .priority = NF_IP_PRI_NAT_DST + 1
110 +#endif
111 +};
112 +
113 +static struct nf_hook_ops imq_egress_ipv4 = {
114 + .hook = imq_nf_hook,
115 + .owner = THIS_MODULE,
116 + .pf = PF_INET,
117 + .hooknum = NF_INET_POST_ROUTING,
118 +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
119 + .priority = NF_IP_PRI_LAST
120 +#else
121 + .priority = NF_IP_PRI_NAT_SRC - 1
122 +#endif
123 +};
124 +
125 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
126 +static struct nf_hook_ops imq_ingress_ipv6 = {
127 + .hook = imq_nf_hook,
128 + .owner = THIS_MODULE,
129 + .pf = PF_INET6,
130 + .hooknum = NF_INET_PRE_ROUTING,
131 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
132 + .priority = NF_IP6_PRI_MANGLE + 1
133 +#else
134 + .priority = NF_IP6_PRI_NAT_DST + 1
135 +#endif
136 +};
137 +
138 +static struct nf_hook_ops imq_egress_ipv6 = {
139 + .hook = imq_nf_hook,
140 + .owner = THIS_MODULE,
141 + .pf = PF_INET6,
142 + .hooknum = NF_INET_POST_ROUTING,
143 +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
144 + .priority = NF_IP6_PRI_LAST
145 +#else
146 + .priority = NF_IP6_PRI_NAT_SRC - 1
147 +#endif
148 +};
149 +#endif
150 +
151 +#if defined(CONFIG_IMQ_NUM_DEVS)
152 +static unsigned int numdevs = CONFIG_IMQ_NUM_DEVS;
153 +#else
154 +static unsigned int numdevs = IMQ_MAX_DEVS;
155 +#endif
156 +
157 +static DEFINE_SPINLOCK(imq_nf_queue_lock);
158 +
159 +static struct net_device *imq_devs_cache[IMQ_MAX_DEVS];
160 +
161 +
162 +static struct net_device_stats *imq_get_stats(struct net_device *dev)
163 +{
164 + return &dev->stats;
165 +}
166 +
167 +/* called for packets kfree'd in qdiscs at places other than enqueue */
168 +static void imq_skb_destructor(struct sk_buff *skb)
169 +{
170 + struct nf_queue_entry *entry = skb->nf_queue_entry;
171 +
172 + if (entry) {
173 + nf_queue_entry_release_refs(entry);
174 + kfree(entry);
175 + }
176 +
177 + skb_restore_cb(skb); /* kfree backup */
178 +}
179 +
180 +static void imq_nf_reinject(struct nf_queue_entry *entry, unsigned int verdict)
181 +{
182 + int status;
183 +
184 + if (!entry->next_outfn) {
185 + spin_lock_bh(&imq_nf_queue_lock);
186 + nf_reinject(entry, verdict);
187 + spin_unlock_bh(&imq_nf_queue_lock);
188 + return;
189 + }
190 +
191 + rcu_read_lock();
192 + local_bh_disable();
193 + status = entry->next_outfn(entry, entry->next_queuenum);
194 + local_bh_enable();
195 + if (status < 0) {
196 + nf_queue_entry_release_refs(entry);
197 + kfree_skb(entry->skb);
198 + kfree(entry);
199 + }
200 +
201 + rcu_read_unlock();
202 +}
203 +
204 +static int imq_dev_xmit(struct sk_buff *skb, struct net_device *dev)
205 +{
206 + dev->stats.tx_bytes += skb->len;
207 + dev->stats.tx_packets++;
208 +
209 + skb->imq_flags = 0;
210 + skb->destructor = NULL;
211 +
212 + skb_restore_cb(skb); /* restore skb->cb */
213 +
214 + dev->trans_start = jiffies;
215 + imq_nf_reinject(skb->nf_queue_entry, NF_ACCEPT);
216 + return 0;
217 +}
218 +
219 +static int imq_nf_queue(struct nf_queue_entry *entry, unsigned queue_num)
220 +{
221 + struct net_device *dev;
222 + struct sk_buff *skb_orig, *skb, *skb_shared;
223 + struct Qdisc *q;
224 + struct netdev_queue *txq;
225 + int users, index;
226 + int retval = -EINVAL;
227 +
228 + index = entry->skb->imq_flags & IMQ_F_IFMASK;
229 + if (unlikely(index > numdevs - 1)) {
230 + if (net_ratelimit())
231 + printk(KERN_WARNING
232 + "IMQ: invalid device specified, highest is %u\n",
233 + numdevs - 1);
234 + retval = -EINVAL;
235 + goto out;
236 + }
237 +
238 + /* check for imq device by index from cache */
239 + dev = imq_devs_cache[index];
240 + if (unlikely(!dev)) {
241 + char buf[8];
242 +
243 + /* get device by name and cache result */
244 + snprintf(buf, sizeof(buf), "imq%d", index);
245 + dev = dev_get_by_name(&init_net, buf);
246 + if (!dev) {
247 + /* not found ?!*/
248 + BUG();
249 + retval = -ENODEV;
250 + goto out;
251 + }
252 +
253 + imq_devs_cache[index] = dev;
254 + dev_put(dev);
255 + }
256 +
257 + if (unlikely(!(dev->flags & IFF_UP))) {
258 + entry->skb->imq_flags = 0;
259 + imq_nf_reinject(entry, NF_ACCEPT);
260 + retval = 0;
261 + goto out;
262 + }
263 + dev->last_rx = jiffies;
264 +
265 + skb = entry->skb;
266 + skb_orig = NULL;
267 +
268 + /* skb has owner? => make clone */
269 + if (unlikely(skb->destructor)) {
270 + skb_orig = skb;
271 + skb = skb_clone(skb, GFP_ATOMIC);
272 + if (!skb) {
273 + retval = -ENOMEM;
274 + goto out;
275 + }
276 + entry->skb = skb;
277 + }
278 +
279 + skb->nf_queue_entry = entry;
280 +
281 + dev->stats.rx_bytes += skb->len;
282 + dev->stats.rx_packets++;
283 +
284 + txq = dev_pick_tx(dev, skb);
285 +
286 + q = rcu_dereference(txq->qdisc);
287 + if (unlikely(!q->enqueue))
288 + goto packet_not_eaten_by_imq_dev;
289 +
290 + spin_lock_bh(qdisc_lock(q));
291 +
292 + users = atomic_read(&skb->users);
293 +
294 + skb_shared = skb_get(skb); /* increase reference count by one */
295 + skb_save_cb(skb_shared); /* backup skb->cb, as qdisc layer will
296 + overwrite it */
297 + qdisc_enqueue_root(skb_shared, q); /* might kfree_skb */
298 +
299 + if (likely(atomic_read(&skb_shared->users) == users + 1)) {
300 + kfree_skb(skb_shared); /* decrease reference count by one */
301 +
302 + skb->destructor = &imq_skb_destructor;
303 +
304 + /* cloned? */
305 + if (skb_orig)
306 + kfree_skb(skb_orig); /* free original */
307 +
308 + spin_unlock_bh(qdisc_lock(q));
309 +
310 + /* schedule qdisc dequeue */
311 + __netif_schedule(q);
312 +
313 + retval = 0;
314 + goto out;
315 + } else {
316 + skb_restore_cb(skb_shared); /* restore skb->cb */
317 + /* qdisc dropped packet and decreased skb reference count of
318 + * skb, so we don't really want to and try refree as that would
319 + * actually destroy the skb. */
320 + spin_unlock_bh(qdisc_lock(q));
321 + goto packet_not_eaten_by_imq_dev;
322 + }
323 +
324 +packet_not_eaten_by_imq_dev:
325 + /* cloned? restore original */
326 + if (skb_orig) {
327 + kfree_skb(skb);
328 + entry->skb = skb_orig;
329 + }
330 + retval = -1;
331 +out:
332 + return retval;
333 +}
334 +
335 +static struct nf_queue_handler nfqh = {
336 + .name = "imq",
337 + .outfn = imq_nf_queue,
338 +};
339 +
340 +static unsigned int imq_nf_hook(unsigned int hook, struct sk_buff *pskb,
341 + const struct net_device *indev,
342 + const struct net_device *outdev,
343 + int (*okfn)(struct sk_buff *))
344 +{
345 + if (pskb->imq_flags & IMQ_F_ENQUEUE)
346 + return NF_QUEUE;
347 +
348 + return NF_ACCEPT;
349 +}
350 +
351 +static int imq_close(struct net_device *dev)
352 +{
353 + netif_stop_queue(dev);
354 + return 0;
355 +}
356 +
357 +static int imq_open(struct net_device *dev)
358 +{
359 + netif_start_queue(dev);
360 + return 0;
361 +}
362 +
363 +static void imq_setup(struct net_device *dev)
364 +{
365 + dev->hard_start_xmit = imq_dev_xmit;
366 + dev->open = imq_open;
367 + dev->get_stats = imq_get_stats;
368 + dev->stop = imq_close;
369 + dev->type = ARPHRD_VOID;
370 + dev->mtu = 16000;
371 + dev->tx_queue_len = 11000;
372 + dev->flags = IFF_NOARP;
373 + dev->features = NETIF_F_SG | NETIF_F_FRAGLIST |
374 + NETIF_F_GSO | NETIF_F_HW_CSUM |
375 + NETIF_F_HIGHDMA;
376 +}
377 +
378 +static int imq_validate(struct nlattr *tb[], struct nlattr *data[])
379 +{
380 + int ret = 0;
381 +
382 + if (tb[IFLA_ADDRESS]) {
383 + if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
384 + ret = -EINVAL;
385 + goto end;
386 + }
387 + if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
388 + ret = -EADDRNOTAVAIL;
389 + goto end;
390 + }
391 + }
392 + return 0;
393 +end:
394 + printk(KERN_WARNING "IMQ: imq_validate failed (%d)\n", ret);
395 + return ret;
396 +}
397 +
398 +static struct rtnl_link_ops imq_link_ops __read_mostly = {
399 + .kind = "imq",
400 + .priv_size = 0,
401 + .setup = imq_setup,
402 + .validate = imq_validate,
403 +};
404 +
405 +static int __init imq_init_hooks(void)
406 +{
407 + int err;
408 +
409 + nf_register_queue_imq_handler(&nfqh);
410 +
411 + err = nf_register_hook(&imq_ingress_ipv4);
412 + if (err)
413 + goto err1;
414 +
415 + err = nf_register_hook(&imq_egress_ipv4);
416 + if (err)
417 + goto err2;
418 +
419 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
420 + err = nf_register_hook(&imq_ingress_ipv6);
421 + if (err)
422 + goto err3;
423 +
424 + err = nf_register_hook(&imq_egress_ipv6);
425 + if (err)
426 + goto err4;
427 +#endif
428 +
429 + return 0;
430 +
431 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
432 +err4:
433 + nf_unregister_hook(&imq_ingress_ipv6);
434 +err3:
435 + nf_unregister_hook(&imq_egress_ipv4);
436 +#endif
437 +err2:
438 + nf_unregister_hook(&imq_ingress_ipv4);
439 +err1:
440 + nf_unregister_queue_imq_handler();
441 + return err;
442 +}
443 +
444 +static int __init imq_init_one(int index)
445 +{
446 + struct net_device *dev;
447 + int ret;
448 +
449 + dev = alloc_netdev(0, "imq%d", imq_setup);
450 + if (!dev)
451 + return -ENOMEM;
452 +
453 + ret = dev_alloc_name(dev, dev->name);
454 + if (ret < 0)
455 + goto fail;
456 +
457 + dev->rtnl_link_ops = &imq_link_ops;
458 + ret = register_netdevice(dev);
459 + if (ret < 0)
460 + goto fail;
461 +
462 + return 0;
463 +fail:
464 + free_netdev(dev);
465 + return ret;
466 +}
467 +
468 +static int __init imq_init_devs(void)
469 +{
470 + int err, i;
471 +
472 + if (numdevs < 1 || numdevs > IMQ_MAX_DEVS) {
473 + printk(KERN_ERR "IMQ: numdevs has to be betweed 1 and %u\n",
474 + IMQ_MAX_DEVS);
475 + return -EINVAL;
476 + }
477 +
478 + rtnl_lock();
479 + err = __rtnl_link_register(&imq_link_ops);
480 +
481 + for (i = 0; i < numdevs && !err; i++)
482 + err = imq_init_one(i);
483 +
484 + if (err) {
485 + __rtnl_link_unregister(&imq_link_ops);
486 + memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
487 + }
488 + rtnl_unlock();
489 +
490 + return err;
491 +}
492 +
493 +static int __init imq_init_module(void)
494 +{
495 + int err;
496 +
497 +#if defined(CONFIG_IMQ_NUM_DEVS)
498 + BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS > 16);
499 + BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS < 2);
500 + BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS - 1 > IMQ_F_IFMASK);
501 +#endif
502 +
503 + err = imq_init_devs();
504 + if (err) {
505 + printk(KERN_ERR "IMQ: Error trying imq_init_devs(net)\n");
506 + return err;
507 + }
508 +
509 + err = imq_init_hooks();
510 + if (err) {
511 + printk(KERN_ERR "IMQ: Error trying imq_init_hooks()\n");
512 + rtnl_link_unregister(&imq_link_ops);
513 + memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
514 + return err;
515 + }
516 +
517 + printk(KERN_INFO "IMQ driver loaded successfully.\n");
518 +
519 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
520 + printk(KERN_INFO "\tHooking IMQ before NAT on PREROUTING.\n");
521 +#else
522 + printk(KERN_INFO "\tHooking IMQ after NAT on PREROUTING.\n");
523 +#endif
524 +#if defined(CONFIG_IMQ_BEHAVIOR_AB) || defined(CONFIG_IMQ_BEHAVIOR_BB)
525 + printk(KERN_INFO "\tHooking IMQ before NAT on POSTROUTING.\n");
526 +#else
527 + printk(KERN_INFO "\tHooking IMQ after NAT on POSTROUTING.\n");
528 +#endif
529 +
530 + return 0;
531 +}
532 +
533 +static void __exit imq_unhook(void)
534 +{
535 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
536 + nf_unregister_hook(&imq_ingress_ipv6);
537 + nf_unregister_hook(&imq_egress_ipv6);
538 +#endif
539 + nf_unregister_hook(&imq_ingress_ipv4);
540 + nf_unregister_hook(&imq_egress_ipv4);
541 +
542 + nf_unregister_queue_imq_handler();
543 +}
544 +
545 +static void __exit imq_cleanup_devs(void)
546 +{
547 + rtnl_link_unregister(&imq_link_ops);
548 + memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
549 +}
550 +
551 +static void __exit imq_exit_module(void)
552 +{
553 + imq_unhook();
554 + imq_cleanup_devs();
555 + printk(KERN_INFO "IMQ driver unloaded successfully.\n");
556 +}
557 +
558 +module_init(imq_init_module);
559 +module_exit(imq_exit_module);
560 +
561 +module_param(numdevs, int, 0);
562 +MODULE_PARM_DESC(numdevs, "number of IMQ devices (how many imq* devices will "
563 + "be created)");
564 +MODULE_AUTHOR("http://www.linuximq.net");
565 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See "
566 + "http://www.linuximq.net/ for more information.");
567 +MODULE_LICENSE("GPL");
568 +MODULE_ALIAS_RTNL_LINK("imq");
569 +
570 --- a/drivers/net/Kconfig
571 +++ b/drivers/net/Kconfig
572 @@ -109,6 +109,129 @@ config EQUALIZER
573 To compile this driver as a module, choose M here: the module
574 will be called eql. If unsure, say N.
575
576 +config IMQ
577 + tristate "IMQ (intermediate queueing device) support"
578 + depends on NETDEVICES && NETFILTER
579 + ---help---
580 + The IMQ device(s) is used as placeholder for QoS queueing
581 + disciplines. Every packet entering/leaving the IP stack can be
582 + directed through the IMQ device where it's enqueued/dequeued to the
583 + attached qdisc. This allows you to treat network devices as classes
584 + and distribute bandwidth among them. Iptables is used to specify
585 + through which IMQ device, if any, packets travel.
586 +
587 + More information at: http://www.linuximq.net/
588 +
589 + To compile this driver as a module, choose M here: the module
590 + will be called imq. If unsure, say N.
591 +
592 +choice
593 + prompt "IMQ behavior (PRE/POSTROUTING)"
594 + depends on IMQ
595 + default IMQ_BEHAVIOR_AB
596 + help
597 +
598 + This settings defines how IMQ behaves in respect to its
599 + hooking in PREROUTING and POSTROUTING.
600 +
601 + IMQ can work in any of the following ways:
602 +
603 + PREROUTING | POSTROUTING
604 + -----------------|-------------------
605 + #1 After NAT | After NAT
606 + #2 After NAT | Before NAT
607 + #3 Before NAT | After NAT
608 + #4 Before NAT | Before NAT
609 +
610 + The default behavior is to hook before NAT on PREROUTING
611 + and after NAT on POSTROUTING (#3).
612 +
613 + This settings are specially usefull when trying to use IMQ
614 + to shape NATed clients.
615 +
616 + More information can be found at: www.linuximq.net
617 +
618 + If not sure leave the default settings alone.
619 +
620 +config IMQ_BEHAVIOR_AA
621 + bool "IMQ AA"
622 + help
623 + This settings defines how IMQ behaves in respect to its
624 + hooking in PREROUTING and POSTROUTING.
625 +
626 + Choosing this option will make IMQ hook like this:
627 +
628 + PREROUTING: After NAT
629 + POSTROUTING: After NAT
630 +
631 + More information can be found at: www.linuximq.net
632 +
633 + If not sure leave the default settings alone.
634 +
635 +config IMQ_BEHAVIOR_AB
636 + bool "IMQ AB"
637 + help
638 + This settings defines how IMQ behaves in respect to its
639 + hooking in PREROUTING and POSTROUTING.
640 +
641 + Choosing this option will make IMQ hook like this:
642 +
643 + PREROUTING: After NAT
644 + POSTROUTING: Before NAT
645 +
646 + More information can be found at: www.linuximq.net
647 +
648 + If not sure leave the default settings alone.
649 +
650 +config IMQ_BEHAVIOR_BA
651 + bool "IMQ BA"
652 + help
653 + This settings defines how IMQ behaves in respect to its
654 + hooking in PREROUTING and POSTROUTING.
655 +
656 + Choosing this option will make IMQ hook like this:
657 +
658 + PREROUTING: Before NAT
659 + POSTROUTING: After NAT
660 +
661 + More information can be found at: www.linuximq.net
662 +
663 + If not sure leave the default settings alone.
664 +
665 +config IMQ_BEHAVIOR_BB
666 + bool "IMQ BB"
667 + help
668 + This settings defines how IMQ behaves in respect to its
669 + hooking in PREROUTING and POSTROUTING.
670 +
671 + Choosing this option will make IMQ hook like this:
672 +
673 + PREROUTING: Before NAT
674 + POSTROUTING: Before NAT
675 +
676 + More information can be found at: www.linuximq.net
677 +
678 + If not sure leave the default settings alone.
679 +
680 +endchoice
681 +
682 +config IMQ_NUM_DEVS
683 +
684 + int "Number of IMQ devices"
685 + range 2 16
686 + depends on IMQ
687 + default "16"
688 + help
689 +
690 + This settings defines how many IMQ devices will be
691 + created.
692 +
693 + The default value is 16.
694 +
695 + More information can be found at: www.linuximq.net
696 +
697 + If not sure leave the default settings alone.
698 +
699 config TUN
700 tristate "Universal TUN/TAP device driver support"
701 select CRC32
702 --- a/drivers/net/Makefile
703 +++ b/drivers/net/Makefile
704 @@ -144,6 +144,7 @@ obj-$(CONFIG_SLHC) += slhc.o
705 obj-$(CONFIG_XEN_NETDEV_FRONTEND) += xen-netfront.o
706
707 obj-$(CONFIG_DUMMY) += dummy.o
708 +obj-$(CONFIG_IMQ) += imq.o
709 obj-$(CONFIG_IFB) += ifb.o
710 obj-$(CONFIG_MACVLAN) += macvlan.o
711 obj-$(CONFIG_DE600) += de600.o
712 --- /dev/null
713 +++ b/include/linux/imq.h
714 @@ -0,0 +1,13 @@
715 +#ifndef _IMQ_H
716 +#define _IMQ_H
717 +
718 +/* IFMASK (16 device indexes, 0 to 15) and flag(s) fit in 5 bits */
719 +#define IMQ_F_BITS 5
720 +
721 +#define IMQ_F_IFMASK 0x0f
722 +#define IMQ_F_ENQUEUE 0x10
723 +
724 +#define IMQ_MAX_DEVS (IMQ_F_IFMASK + 1)
725 +
726 +#endif /* _IMQ_H */
727 +
728 --- /dev/null
729 +++ b/include/linux/netfilter_ipv4/ipt_IMQ.h
730 @@ -0,0 +1,10 @@
731 +#ifndef _IPT_IMQ_H
732 +#define _IPT_IMQ_H
733 +
734 +/* Backwards compatibility for old userspace */
735 +#include <linux/netfilter/xt_IMQ.h>
736 +
737 +#define ipt_imq_info xt_imq_info
738 +
739 +#endif /* _IPT_IMQ_H */
740 +
741 --- /dev/null
742 +++ b/include/linux/netfilter_ipv6/ip6t_IMQ.h
743 @@ -0,0 +1,10 @@
744 +#ifndef _IP6T_IMQ_H
745 +#define _IP6T_IMQ_H
746 +
747 +/* Backwards compatibility for old userspace */
748 +#include <linux/netfilter/xt_IMQ.h>
749 +
750 +#define ip6t_imq_info xt_imq_info
751 +
752 +#endif /* _IP6T_IMQ_H */
753 +
754 --- a/include/linux/skbuff.h
755 +++ b/include/linux/skbuff.h
756 @@ -28,6 +28,9 @@
757 #include <linux/rcupdate.h>
758 #include <linux/dmaengine.h>
759 #include <linux/hrtimer.h>
760 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
761 +#include <linux/imq.h>
762 +#endif
763
764 #define HAVE_ALLOC_SKB /* For the drivers to know */
765 #define HAVE_ALIGNABLE_SKB /* Ditto 8) */
766 @@ -272,6 +275,9 @@ struct sk_buff {
767 * first. This is owned by whoever has the skb queued ATM.
768 */
769 char cb[48];
770 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
771 + void *cb_next;
772 +#endif
773
774 unsigned int len,
775 data_len;
776 @@ -302,6 +308,9 @@ struct sk_buff {
777 struct nf_conntrack *nfct;
778 struct sk_buff *nfct_reasm;
779 #endif
780 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
781 + struct nf_queue_entry *nf_queue_entry;
782 +#endif
783 #ifdef CONFIG_BRIDGE_NETFILTER
784 struct nf_bridge_info *nf_bridge;
785 #endif
786 @@ -321,6 +330,9 @@ struct sk_buff {
787 __u8 do_not_encrypt:1;
788 #endif
789 /* 0/13/14 bit hole */
790 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
791 + __u8 imq_flags:IMQ_F_BITS;
792 +#endif
793
794 #ifdef CONFIG_NET_DMA
795 dma_cookie_t dma_cookie;
796 @@ -353,6 +365,12 @@ struct sk_buff {
797
798 #include <asm/system.h>
799
800 +
801 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
802 +extern int skb_save_cb(struct sk_buff *skb);
803 +extern int skb_restore_cb(struct sk_buff *skb);
804 +#endif
805 +
806 extern void kfree_skb(struct sk_buff *skb);
807 extern void __kfree_skb(struct sk_buff *skb);
808 extern struct sk_buff *__alloc_skb(unsigned int size,
809 @@ -1633,6 +1651,10 @@ static inline void __nf_copy(struct sk_b
810 dst->nfct_reasm = src->nfct_reasm;
811 nf_conntrack_get_reasm(src->nfct_reasm);
812 #endif
813 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
814 + dst->imq_flags = src->imq_flags;
815 + dst->nf_queue_entry = src->nf_queue_entry;
816 +#endif
817 #ifdef CONFIG_BRIDGE_NETFILTER
818 dst->nf_bridge = src->nf_bridge;
819 nf_bridge_get(src->nf_bridge);
820 --- a/net/core/dev.c
821 +++ b/net/core/dev.c
822 @@ -96,6 +96,9 @@
823 #include <net/net_namespace.h>
824 #include <net/sock.h>
825 #include <linux/rtnetlink.h>
826 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
827 +#include <linux/imq.h>
828 +#endif
829 #include <linux/proc_fs.h>
830 #include <linux/seq_file.h>
831 #include <linux/stat.h>
832 @@ -1624,7 +1627,11 @@ int dev_hard_start_xmit(struct sk_buff *
833 struct netdev_queue *txq)
834 {
835 if (likely(!skb->next)) {
836 - if (!list_empty(&ptype_all))
837 + if (!list_empty(&ptype_all)
838 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
839 + && !(skb->imq_flags & IMQ_F_ENQUEUE)
840 +#endif
841 + )
842 dev_queue_xmit_nit(skb, dev);
843
844 if (netif_needs_gso(dev, skb)) {
845 @@ -1715,8 +1722,7 @@ static u16 simple_tx_hash(struct net_dev
846 return (u16) (((u64) hash * dev->real_num_tx_queues) >> 32);
847 }
848
849 -static struct netdev_queue *dev_pick_tx(struct net_device *dev,
850 - struct sk_buff *skb)
851 +struct netdev_queue *dev_pick_tx(struct net_device *dev, struct sk_buff *skb)
852 {
853 u16 queue_index = 0;
854
855 @@ -1728,6 +1734,7 @@ static struct netdev_queue *dev_pick_tx(
856 skb_set_queue_mapping(skb, queue_index);
857 return netdev_get_tx_queue(dev, queue_index);
858 }
859 +EXPORT_SYMBOL(dev_pick_tx);
860
861 /**
862 * dev_queue_xmit - transmit a buffer
863 --- a/include/linux/netdevice.h
864 +++ b/include/linux/netdevice.h
865 @@ -915,6 +915,7 @@ extern int dev_alloc_name(struct net_de
866 extern int dev_open(struct net_device *dev);
867 extern int dev_close(struct net_device *dev);
868 extern void dev_disable_lro(struct net_device *dev);
869 +extern struct netdev_queue *dev_pick_tx(struct net_device *dev, struct sk_buff *skb);
870 extern int dev_queue_xmit(struct sk_buff *skb);
871 extern int register_netdevice(struct net_device *dev);
872 extern void unregister_netdevice(struct net_device *dev);
873 --- /dev/null
874 +++ b/include/linux/netfilter/xt_IMQ.h
875 @@ -0,0 +1,9 @@
876 +#ifndef _XT_IMQ_H
877 +#define _XT_IMQ_H
878 +
879 +struct xt_imq_info {
880 + unsigned int todev; /* target imq device */
881 +};
882 +
883 +#endif /* _XT_IMQ_H */
884 +
885 --- a/include/net/netfilter/nf_queue.h
886 +++ b/include/net/netfilter/nf_queue.h
887 @@ -13,6 +13,12 @@ struct nf_queue_entry {
888 struct net_device *indev;
889 struct net_device *outdev;
890 int (*okfn)(struct sk_buff *);
891 +
892 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
893 + int (*next_outfn)(struct nf_queue_entry *entry,
894 + unsigned int queuenum);
895 + unsigned int next_queuenum;
896 +#endif
897 };
898
899 #define nf_queue_entry_reroute(x) ((void *)x + sizeof(struct nf_queue_entry))
900 @@ -30,5 +36,11 @@ extern int nf_unregister_queue_handler(i
901 const struct nf_queue_handler *qh);
902 extern void nf_unregister_queue_handlers(const struct nf_queue_handler *qh);
903 extern void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict);
904 +extern void nf_queue_entry_release_refs(struct nf_queue_entry *entry);
905 +
906 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
907 +extern void nf_register_queue_imq_handler(const struct nf_queue_handler *qh);
908 +extern void nf_unregister_queue_imq_handler(void);
909 +#endif
910
911 #endif /* _NF_QUEUE_H */
912 --- a/net/core/skbuff.c
913 +++ b/net/core/skbuff.c
914 @@ -69,6 +69,9 @@
915
916 static struct kmem_cache *skbuff_head_cache __read_mostly;
917 static struct kmem_cache *skbuff_fclone_cache __read_mostly;
918 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
919 +static struct kmem_cache *skbuff_cb_store_cache __read_mostly;
920 +#endif
921
922 static void sock_pipe_buf_release(struct pipe_inode_info *pipe,
923 struct pipe_buffer *buf)
924 @@ -88,6 +91,80 @@ static int sock_pipe_buf_steal(struct pi
925 return 1;
926 }
927
928 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
929 +/* Control buffer save/restore for IMQ devices */
930 +struct skb_cb_table {
931 + void *cb_next;
932 + atomic_t refcnt;
933 + char cb[48];
934 +};
935 +
936 +static DEFINE_SPINLOCK(skb_cb_store_lock);
937 +
938 +int skb_save_cb(struct sk_buff *skb)
939 +{
940 + struct skb_cb_table *next;
941 +
942 + next = kmem_cache_alloc(skbuff_cb_store_cache, GFP_ATOMIC);
943 + if (!next)
944 + return -ENOMEM;
945 +
946 + BUILD_BUG_ON(sizeof(skb->cb) != sizeof(next->cb));
947 +
948 + memcpy(next->cb, skb->cb, sizeof(skb->cb));
949 + next->cb_next = skb->cb_next;
950 +
951 + atomic_set(&next->refcnt, 1);
952 +
953 + skb->cb_next = next;
954 + return 0;
955 +}
956 +EXPORT_SYMBOL(skb_save_cb);
957 +
958 +int skb_restore_cb(struct sk_buff *skb)
959 +{
960 + struct skb_cb_table *next;
961 +
962 + if (!skb->cb_next)
963 + return 0;
964 +
965 + next = skb->cb_next;
966 +
967 + BUILD_BUG_ON(sizeof(skb->cb) != sizeof(next->cb));
968 +
969 + memcpy(skb->cb, next->cb, sizeof(skb->cb));
970 + skb->cb_next = next->cb_next;
971 +
972 + spin_lock(&skb_cb_store_lock);
973 +
974 + if (atomic_dec_and_test(&next->refcnt)) {
975 + kmem_cache_free(skbuff_cb_store_cache, next);
976 + }
977 +
978 + spin_unlock(&skb_cb_store_lock);
979 +
980 + return 0;
981 +}
982 +EXPORT_SYMBOL(skb_restore_cb);
983 +
984 +static void skb_copy_stored_cb(struct sk_buff *new, struct sk_buff *old)
985 +{
986 + struct skb_cb_table *next;
987 +
988 + if (!old->cb_next) {
989 + new->cb_next = 0;
990 + return;
991 + }
992 +
993 + spin_lock(&skb_cb_store_lock);
994 +
995 + next = old->cb_next;
996 + atomic_inc(&next->refcnt);
997 + new->cb_next = next;
998 +
999 + spin_unlock(&skb_cb_store_lock);
1000 +}
1001 +#endif
1002
1003 /* Pipe buffer operations for a socket. */
1004 static struct pipe_buf_operations sock_pipe_buf_ops = {
1005 @@ -362,6 +439,15 @@ static void skb_release_all(struct sk_bu
1006 WARN_ON(in_irq());
1007 skb->destructor(skb);
1008 }
1009 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1010 + /* This should not happen. When it does, avoid memleak by restoring
1011 + the chain of cb-backups. */
1012 + while(skb->cb_next != NULL) {
1013 + printk(KERN_WARNING "kfree_skb: skb->cb_next: %08x\n",
1014 + skb->cb_next);
1015 + skb_restore_cb(skb);
1016 + }
1017 +#endif
1018 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
1019 nf_conntrack_put(skb->nfct);
1020 nf_conntrack_put_reasm(skb->nfct_reasm);
1021 @@ -424,6 +510,9 @@ static void __copy_skb_header(struct sk_
1022 new->sp = secpath_get(old->sp);
1023 #endif
1024 memcpy(new->cb, old->cb, sizeof(old->cb));
1025 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1026 + skb_copy_stored_cb(new, old);
1027 +#endif
1028 new->csum_start = old->csum_start;
1029 new->csum_offset = old->csum_offset;
1030 new->local_df = old->local_df;
1031 @@ -2326,6 +2415,13 @@ void __init skb_init(void)
1032 0,
1033 SLAB_HWCACHE_ALIGN|SLAB_PANIC,
1034 NULL);
1035 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1036 + skbuff_cb_store_cache = kmem_cache_create("skbuff_cb_store_cache",
1037 + sizeof(struct skb_cb_table),
1038 + 0,
1039 + SLAB_HWCACHE_ALIGN|SLAB_PANIC,
1040 + NULL);
1041 +#endif
1042 }
1043
1044 /**
1045 --- a/net/netfilter/Kconfig
1046 +++ b/net/netfilter/Kconfig
1047 @@ -342,6 +342,18 @@ config NETFILTER_XT_TARGET_DSCP
1048
1049 To compile it as a module, choose M here. If unsure, say N.
1050
1051 +config NETFILTER_XT_TARGET_IMQ
1052 + tristate '"IMQ" target support'
1053 + depends on NETFILTER_XTABLES
1054 + depends on IP_NF_MANGLE || IP6_NF_MANGLE
1055 + select IMQ
1056 + default m if NETFILTER_ADVANCED=n
1057 + help
1058 + This option adds a `IMQ' target which is used to specify if and
1059 + to which imq device packets should get enqueued/dequeued.
1060 +
1061 + To compile it as a module, choose M here. If unsure, say N.
1062 +
1063 config NETFILTER_XT_TARGET_MARK
1064 tristate '"MARK" target support'
1065 depends on NETFILTER_XTABLES
1066 --- a/net/netfilter/Makefile
1067 +++ b/net/netfilter/Makefile
1068 @@ -42,6 +42,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CLASSIF
1069 obj-$(CONFIG_NETFILTER_XT_TARGET_CONNMARK) += xt_CONNMARK.o
1070 obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
1071 obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
1072 +obj-$(CONFIG_NETFILTER_XT_TARGET_IMQ) += xt_IMQ.o
1073 obj-$(CONFIG_NETFILTER_XT_TARGET_MARK) += xt_MARK.o
1074 obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
1075 obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o
1076 --- a/net/netfilter/nf_queue.c
1077 +++ b/net/netfilter/nf_queue.c
1078 @@ -20,6 +20,26 @@ static const struct nf_queue_handler *qu
1079
1080 static DEFINE_MUTEX(queue_handler_mutex);
1081
1082 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1083 +static const struct nf_queue_handler *queue_imq_handler;
1084 +
1085 +void nf_register_queue_imq_handler(const struct nf_queue_handler *qh)
1086 +{
1087 + mutex_lock(&queue_handler_mutex);
1088 + rcu_assign_pointer(queue_imq_handler, qh);
1089 + mutex_unlock(&queue_handler_mutex);
1090 +}
1091 +EXPORT_SYMBOL(nf_register_queue_imq_handler);
1092 +
1093 +void nf_unregister_queue_imq_handler(void)
1094 +{
1095 + mutex_lock(&queue_handler_mutex);
1096 + rcu_assign_pointer(queue_imq_handler, NULL);
1097 + mutex_unlock(&queue_handler_mutex);
1098 +}
1099 +EXPORT_SYMBOL(nf_unregister_queue_imq_handler);
1100 +#endif
1101 +
1102 /* return EBUSY when somebody else is registered, return EEXIST if the
1103 * same handler is registered, return 0 in case of success. */
1104 int nf_register_queue_handler(int pf, const struct nf_queue_handler *qh)
1105 @@ -80,7 +100,7 @@ void nf_unregister_queue_handlers(const
1106 }
1107 EXPORT_SYMBOL_GPL(nf_unregister_queue_handlers);
1108
1109 -static void nf_queue_entry_release_refs(struct nf_queue_entry *entry)
1110 +void nf_queue_entry_release_refs(struct nf_queue_entry *entry)
1111 {
1112 /* Release those devices we held, or Alexey will kill me. */
1113 if (entry->indev)
1114 @@ -100,6 +120,7 @@ static void nf_queue_entry_release_refs(
1115 /* Drop reference to owner of hook which queued us. */
1116 module_put(entry->elem->owner);
1117 }
1118 +EXPORT_SYMBOL_GPL(nf_queue_entry_release_refs);
1119
1120 /*
1121 * Any packet that leaves via this function must come back
1122 @@ -121,12 +142,26 @@ static int __nf_queue(struct sk_buff *sk
1123 #endif
1124 const struct nf_afinfo *afinfo;
1125 const struct nf_queue_handler *qh;
1126 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1127 + const struct nf_queue_handler *qih = NULL;
1128 +#endif
1129
1130 /* QUEUE == DROP if noone is waiting, to be safe. */
1131 rcu_read_lock();
1132
1133 qh = rcu_dereference(queue_handler[pf]);
1134 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1135 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1136 + if (pf == PF_INET || pf == PF_INET6)
1137 +#else
1138 + if (pf == PF_INET)
1139 +#endif
1140 + qih = rcu_dereference(queue_imq_handler);
1141 +
1142 + if (!qh && !qih)
1143 +#else /* !IMQ */
1144 if (!qh)
1145 +#endif
1146 goto err_unlock;
1147
1148 afinfo = nf_get_afinfo(pf);
1149 @@ -145,6 +180,10 @@ static int __nf_queue(struct sk_buff *sk
1150 .indev = indev,
1151 .outdev = outdev,
1152 .okfn = okfn,
1153 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1154 + .next_outfn = qh ? qh->outfn : NULL,
1155 + .next_queuenum = queuenum,
1156 +#endif
1157 };
1158
1159 /* If it's going away, ignore hook. */
1160 @@ -170,8 +209,19 @@ static int __nf_queue(struct sk_buff *sk
1161 }
1162 #endif
1163 afinfo->saveroute(skb, entry);
1164 +
1165 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1166 + if (qih) {
1167 + status = qih->outfn(entry, queuenum);
1168 + goto imq_skip_queue;
1169 + }
1170 +#endif
1171 +
1172 status = qh->outfn(entry, queuenum);
1173
1174 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1175 +imq_skip_queue:
1176 +#endif
1177 rcu_read_unlock();
1178
1179 if (status < 0) {
1180 --- /dev/null
1181 +++ b/net/netfilter/xt_IMQ.c
1182 @@ -0,0 +1,81 @@
1183 +/*
1184 + * This target marks packets to be enqueued to an imq device
1185 + */
1186 +#include <linux/module.h>
1187 +#include <linux/skbuff.h>
1188 +#include <linux/netfilter/x_tables.h>
1189 +#include <linux/netfilter/xt_IMQ.h>
1190 +#include <linux/imq.h>
1191 +
1192 +static unsigned int imq_target(struct sk_buff *pskb,
1193 + const struct net_device *in,
1194 + const struct net_device *out,
1195 + unsigned int hooknum,
1196 + const struct xt_target *target,
1197 + const void *targinfo)
1198 +{
1199 + const struct xt_imq_info *mr = targinfo;
1200 +
1201 + pskb->imq_flags = (mr->todev & IMQ_F_IFMASK) | IMQ_F_ENQUEUE;
1202 +
1203 + return XT_CONTINUE;
1204 +}
1205 +
1206 +static bool imq_checkentry(const char *tablename,
1207 + const void *entry,
1208 + const struct xt_target *target,
1209 + void *targinfo,
1210 + unsigned int hook_mask)
1211 +{
1212 + struct xt_imq_info *mr = targinfo;
1213 +
1214 + if (mr->todev > IMQ_MAX_DEVS - 1) {
1215 + printk(KERN_WARNING
1216 + "IMQ: invalid device specified, highest is %u\n",
1217 + IMQ_MAX_DEVS - 1);
1218 + return 0;
1219 + }
1220 +
1221 + return 1;
1222 +}
1223 +
1224 +static struct xt_target xt_imq_reg[] __read_mostly = {
1225 + {
1226 + .name = "IMQ",
1227 + .family = AF_INET,
1228 + .target = imq_target,
1229 + .targetsize = sizeof(struct xt_imq_info),
1230 + .table = "mangle",
1231 + .checkentry = imq_checkentry,
1232 + .me = THIS_MODULE
1233 + },
1234 + {
1235 + .name = "IMQ",
1236 + .family = AF_INET6,
1237 + .target = imq_target,
1238 + .targetsize = sizeof(struct xt_imq_info),
1239 + .table = "mangle",
1240 + .checkentry = imq_checkentry,
1241 + .me = THIS_MODULE
1242 + },
1243 +};
1244 +
1245 +static int __init imq_init(void)
1246 +{
1247 + return xt_register_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg));
1248 +}
1249 +
1250 +static void __exit imq_fini(void)
1251 +{
1252 + xt_unregister_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg));
1253 +}
1254 +
1255 +module_init(imq_init);
1256 +module_exit(imq_fini);
1257 +
1258 +MODULE_AUTHOR("http://www.linuximq.net");
1259 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
1260 +MODULE_LICENSE("GPL");
1261 +MODULE_ALIAS("ipt_IMQ");
1262 +MODULE_ALIAS("ip6t_IMQ");
1263 +
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