cc9f5f263eb5de713c72d5ec2d32ba5f7f562cb4
[openwrt/svn-archive/archive.git] / target / linux / generic-2.6 / patches-2.6.31 / 150-netfilter_imq.patch
1 --- /dev/null
2 +++ b/drivers/net/imq.c
3 @@ -0,0 +1,571 @@
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 + * - Port to 2.6.28
70 + * - Port to 2.6.29 + fix rmmod not working
71 + *
72 + * 2009/04/20 - (Jussi Kivilinna)
73 + * - Use netdevice feature flags to avoid extra packet handling
74 + * by core networking layer and possibly increase performance.
75 + *
76 + * Also, many thanks to pablo Sebastian Greco for making the initial
77 + * patch and to those who helped the testing.
78 + *
79 + * More info at: http://www.linuximq.net/ (Andre Correa)
80 + */
81 +
82 +#include <linux/module.h>
83 +#include <linux/kernel.h>
84 +#include <linux/moduleparam.h>
85 +#include <linux/list.h>
86 +#include <linux/skbuff.h>
87 +#include <linux/netdevice.h>
88 +#include <linux/etherdevice.h>
89 +#include <linux/rtnetlink.h>
90 +#include <linux/if_arp.h>
91 +#include <linux/netfilter.h>
92 +#include <linux/netfilter_ipv4.h>
93 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
94 + #include <linux/netfilter_ipv6.h>
95 +#endif
96 +#include <linux/imq.h>
97 +#include <net/pkt_sched.h>
98 +#include <net/netfilter/nf_queue.h>
99 +
100 +static nf_hookfn imq_nf_hook;
101 +
102 +static struct nf_hook_ops imq_ingress_ipv4 = {
103 + .hook = imq_nf_hook,
104 + .owner = THIS_MODULE,
105 + .pf = PF_INET,
106 + .hooknum = NF_INET_PRE_ROUTING,
107 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
108 + .priority = NF_IP_PRI_MANGLE + 1
109 +#else
110 + .priority = NF_IP_PRI_NAT_DST + 1
111 +#endif
112 +};
113 +
114 +static struct nf_hook_ops imq_egress_ipv4 = {
115 + .hook = imq_nf_hook,
116 + .owner = THIS_MODULE,
117 + .pf = PF_INET,
118 + .hooknum = NF_INET_POST_ROUTING,
119 +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
120 + .priority = NF_IP_PRI_LAST
121 +#else
122 + .priority = NF_IP_PRI_NAT_SRC - 1
123 +#endif
124 +};
125 +
126 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
127 +static struct nf_hook_ops imq_ingress_ipv6 = {
128 + .hook = imq_nf_hook,
129 + .owner = THIS_MODULE,
130 + .pf = PF_INET6,
131 + .hooknum = NF_INET_PRE_ROUTING,
132 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
133 + .priority = NF_IP6_PRI_MANGLE + 1
134 +#else
135 + .priority = NF_IP6_PRI_NAT_DST + 1
136 +#endif
137 +};
138 +
139 +static struct nf_hook_ops imq_egress_ipv6 = {
140 + .hook = imq_nf_hook,
141 + .owner = THIS_MODULE,
142 + .pf = PF_INET6,
143 + .hooknum = NF_INET_POST_ROUTING,
144 +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
145 + .priority = NF_IP6_PRI_LAST
146 +#else
147 + .priority = NF_IP6_PRI_NAT_SRC - 1
148 +#endif
149 +};
150 +#endif
151 +
152 +#if defined(CONFIG_IMQ_NUM_DEVS)
153 +static unsigned int numdevs = CONFIG_IMQ_NUM_DEVS;
154 +#else
155 +static unsigned int numdevs = IMQ_MAX_DEVS;
156 +#endif
157 +
158 +static DEFINE_SPINLOCK(imq_nf_queue_lock);
159 +
160 +static struct net_device *imq_devs_cache[IMQ_MAX_DEVS];
161 +
162 +
163 +static struct net_device_stats *imq_get_stats(struct net_device *dev)
164 +{
165 + return &dev->stats;
166 +}
167 +
168 +/* called for packets kfree'd in qdiscs at places other than enqueue */
169 +static void imq_skb_destructor(struct sk_buff *skb)
170 +{
171 + struct nf_queue_entry *entry = skb->nf_queue_entry;
172 +
173 + if (entry) {
174 + nf_queue_entry_release_refs(entry);
175 + kfree(entry);
176 + }
177 +
178 + skb_restore_cb(skb); /* kfree backup */
179 +}
180 +
181 +static void imq_nf_reinject(struct nf_queue_entry *entry, unsigned int verdict)
182 +{
183 + int status;
184 +
185 + if (!entry->next_outfn) {
186 + spin_lock_bh(&imq_nf_queue_lock);
187 + nf_reinject(entry, verdict);
188 + spin_unlock_bh(&imq_nf_queue_lock);
189 + return;
190 + }
191 +
192 + rcu_read_lock();
193 + local_bh_disable();
194 + status = entry->next_outfn(entry, entry->next_queuenum);
195 + local_bh_enable();
196 + if (status < 0) {
197 + nf_queue_entry_release_refs(entry);
198 + kfree_skb(entry->skb);
199 + kfree(entry);
200 + }
201 +
202 + rcu_read_unlock();
203 +}
204 +
205 +static int imq_dev_xmit(struct sk_buff *skb, struct net_device *dev)
206 +{
207 + dev->stats.tx_bytes += skb->len;
208 + dev->stats.tx_packets++;
209 +
210 + skb->imq_flags = 0;
211 + skb->destructor = NULL;
212 +
213 + skb_restore_cb(skb); /* restore skb->cb */
214 +
215 + dev->trans_start = jiffies;
216 + imq_nf_reinject(skb->nf_queue_entry, NF_ACCEPT);
217 + return 0;
218 +}
219 +
220 +static int imq_nf_queue(struct nf_queue_entry *entry, unsigned queue_num)
221 +{
222 + struct net_device *dev;
223 + struct sk_buff *skb_orig, *skb, *skb_shared;
224 + struct Qdisc *q;
225 + struct netdev_queue *txq;
226 + int users, index;
227 + int retval = -EINVAL;
228 +
229 + index = entry->skb->imq_flags & IMQ_F_IFMASK;
230 + if (unlikely(index > numdevs - 1)) {
231 + if (net_ratelimit())
232 + printk(KERN_WARNING
233 + "IMQ: invalid device specified, highest is %u\n",
234 + numdevs - 1);
235 + retval = -EINVAL;
236 + goto out;
237 + }
238 +
239 + /* check for imq device by index from cache */
240 + dev = imq_devs_cache[index];
241 + if (unlikely(!dev)) {
242 + char buf[8];
243 +
244 + /* get device by name and cache result */
245 + snprintf(buf, sizeof(buf), "imq%d", index);
246 + dev = dev_get_by_name(&init_net, buf);
247 + if (!dev) {
248 + /* not found ?!*/
249 + BUG();
250 + retval = -ENODEV;
251 + goto out;
252 + }
253 +
254 + imq_devs_cache[index] = dev;
255 + dev_put(dev);
256 + }
257 +
258 + if (unlikely(!(dev->flags & IFF_UP))) {
259 + entry->skb->imq_flags = 0;
260 + imq_nf_reinject(entry, NF_ACCEPT);
261 + retval = 0;
262 + goto out;
263 + }
264 + dev->last_rx = jiffies;
265 +
266 + skb = entry->skb;
267 + skb_orig = NULL;
268 +
269 + /* skb has owner? => make clone */
270 + if (unlikely(skb->destructor)) {
271 + skb_orig = skb;
272 + skb = skb_clone(skb, GFP_ATOMIC);
273 + if (!skb) {
274 + retval = -ENOMEM;
275 + goto out;
276 + }
277 + entry->skb = skb;
278 + }
279 +
280 + skb->nf_queue_entry = entry;
281 +
282 + dev->stats.rx_bytes += skb->len;
283 + dev->stats.rx_packets++;
284 +
285 + txq = dev_pick_tx(dev, skb);
286 +
287 + q = rcu_dereference(txq->qdisc);
288 + if (unlikely(!q->enqueue))
289 + goto packet_not_eaten_by_imq_dev;
290 +
291 + spin_lock_bh(qdisc_lock(q));
292 +
293 + users = atomic_read(&skb->users);
294 +
295 + skb_shared = skb_get(skb); /* increase reference count by one */
296 + skb_save_cb(skb_shared); /* backup skb->cb, as qdisc layer will
297 + overwrite it */
298 + qdisc_enqueue_root(skb_shared, q); /* might kfree_skb */
299 +
300 + if (likely(atomic_read(&skb_shared->users) == users + 1)) {
301 + kfree_skb(skb_shared); /* decrease reference count by one */
302 +
303 + skb->destructor = &imq_skb_destructor;
304 +
305 + /* cloned? */
306 + if (skb_orig)
307 + kfree_skb(skb_orig); /* free original */
308 +
309 + spin_unlock_bh(qdisc_lock(q));
310 +
311 + /* schedule qdisc dequeue */
312 + __netif_schedule(q);
313 +
314 + retval = 0;
315 + goto out;
316 + } else {
317 + skb_restore_cb(skb_shared); /* restore skb->cb */
318 + /* qdisc dropped packet and decreased skb reference count of
319 + * skb, so we don't really want to and try refree as that would
320 + * actually destroy the skb. */
321 + spin_unlock_bh(qdisc_lock(q));
322 + goto packet_not_eaten_by_imq_dev;
323 + }
324 +
325 +packet_not_eaten_by_imq_dev:
326 + /* cloned? restore original */
327 + if (skb_orig) {
328 + kfree_skb(skb);
329 + entry->skb = skb_orig;
330 + }
331 + retval = -1;
332 +out:
333 + return retval;
334 +}
335 +
336 +static struct nf_queue_handler nfqh = {
337 + .name = "imq",
338 + .outfn = imq_nf_queue,
339 +};
340 +
341 +static unsigned int imq_nf_hook(unsigned int hook, struct sk_buff *pskb,
342 + const struct net_device *indev,
343 + const struct net_device *outdev,
344 + int (*okfn)(struct sk_buff *))
345 +{
346 + if (pskb->imq_flags & IMQ_F_ENQUEUE)
347 + return NF_QUEUE;
348 +
349 + return NF_ACCEPT;
350 +}
351 +
352 +static int imq_close(struct net_device *dev)
353 +{
354 + netif_stop_queue(dev);
355 + return 0;
356 +}
357 +
358 +static int imq_open(struct net_device *dev)
359 +{
360 + netif_start_queue(dev);
361 + return 0;
362 +}
363 +
364 +static const struct net_device_ops imq_netdev_ops = {
365 + .ndo_open = imq_open,
366 + .ndo_stop = imq_close,
367 + .ndo_start_xmit = imq_dev_xmit,
368 + .ndo_get_stats = imq_get_stats,
369 +};
370 +
371 +static void imq_setup(struct net_device *dev)
372 +{
373 + dev->netdev_ops = &imq_netdev_ops;
374 + dev->type = ARPHRD_VOID;
375 + dev->mtu = 16000;
376 + dev->tx_queue_len = 11000;
377 + dev->flags = IFF_NOARP;
378 + dev->features = NETIF_F_SG | NETIF_F_FRAGLIST |
379 + NETIF_F_GSO | NETIF_F_HW_CSUM |
380 + NETIF_F_HIGHDMA;
381 +}
382 +
383 +static int imq_validate(struct nlattr *tb[], struct nlattr *data[])
384 +{
385 + int ret = 0;
386 +
387 + if (tb[IFLA_ADDRESS]) {
388 + if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
389 + ret = -EINVAL;
390 + goto end;
391 + }
392 + if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
393 + ret = -EADDRNOTAVAIL;
394 + goto end;
395 + }
396 + }
397 + return 0;
398 +end:
399 + printk(KERN_WARNING "IMQ: imq_validate failed (%d)\n", ret);
400 + return ret;
401 +}
402 +
403 +static struct rtnl_link_ops imq_link_ops __read_mostly = {
404 + .kind = "imq",
405 + .priv_size = 0,
406 + .setup = imq_setup,
407 + .validate = imq_validate,
408 +};
409 +
410 +static int __init imq_init_hooks(void)
411 +{
412 + int err;
413 +
414 + nf_register_queue_imq_handler(&nfqh);
415 +
416 + err = nf_register_hook(&imq_ingress_ipv4);
417 + if (err)
418 + goto err1;
419 +
420 + err = nf_register_hook(&imq_egress_ipv4);
421 + if (err)
422 + goto err2;
423 +
424 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
425 + err = nf_register_hook(&imq_ingress_ipv6);
426 + if (err)
427 + goto err3;
428 +
429 + err = nf_register_hook(&imq_egress_ipv6);
430 + if (err)
431 + goto err4;
432 +#endif
433 +
434 + return 0;
435 +
436 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
437 +err4:
438 + nf_unregister_hook(&imq_ingress_ipv6);
439 +err3:
440 + nf_unregister_hook(&imq_egress_ipv4);
441 +#endif
442 +err2:
443 + nf_unregister_hook(&imq_ingress_ipv4);
444 +err1:
445 + nf_unregister_queue_imq_handler();
446 + return err;
447 +}
448 +
449 +static int __init imq_init_one(int index)
450 +{
451 + struct net_device *dev;
452 + int ret;
453 +
454 + dev = alloc_netdev(0, "imq%d", imq_setup);
455 + if (!dev)
456 + return -ENOMEM;
457 +
458 + ret = dev_alloc_name(dev, dev->name);
459 + if (ret < 0)
460 + goto fail;
461 +
462 + dev->rtnl_link_ops = &imq_link_ops;
463 + ret = register_netdevice(dev);
464 + if (ret < 0)
465 + goto fail;
466 +
467 + return 0;
468 +fail:
469 + free_netdev(dev);
470 + return ret;
471 +}
472 +
473 +static int __init imq_init_devs(void)
474 +{
475 + int err, i;
476 +
477 + if (numdevs < 1 || numdevs > IMQ_MAX_DEVS) {
478 + printk(KERN_ERR "IMQ: numdevs has to be betweed 1 and %u\n",
479 + IMQ_MAX_DEVS);
480 + return -EINVAL;
481 + }
482 +
483 + rtnl_lock();
484 + err = __rtnl_link_register(&imq_link_ops);
485 +
486 + for (i = 0; i < numdevs && !err; i++)
487 + err = imq_init_one(i);
488 +
489 + if (err) {
490 + __rtnl_link_unregister(&imq_link_ops);
491 + memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
492 + }
493 + rtnl_unlock();
494 +
495 + return err;
496 +}
497 +
498 +static int __init imq_init_module(void)
499 +{
500 + int err;
501 +
502 +#if defined(CONFIG_IMQ_NUM_DEVS)
503 + BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS > 16);
504 + BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS < 2);
505 + BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS - 1 > IMQ_F_IFMASK);
506 +#endif
507 +
508 + err = imq_init_devs();
509 + if (err) {
510 + printk(KERN_ERR "IMQ: Error trying imq_init_devs(net)\n");
511 + return err;
512 + }
513 +
514 + err = imq_init_hooks();
515 + if (err) {
516 + printk(KERN_ERR "IMQ: Error trying imq_init_hooks()\n");
517 + rtnl_link_unregister(&imq_link_ops);
518 + memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
519 + return err;
520 + }
521 +
522 + printk(KERN_INFO "IMQ driver loaded successfully.\n");
523 +
524 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
525 + printk(KERN_INFO "\tHooking IMQ before NAT on PREROUTING.\n");
526 +#else
527 + printk(KERN_INFO "\tHooking IMQ after NAT on PREROUTING.\n");
528 +#endif
529 +#if defined(CONFIG_IMQ_BEHAVIOR_AB) || defined(CONFIG_IMQ_BEHAVIOR_BB)
530 + printk(KERN_INFO "\tHooking IMQ before NAT on POSTROUTING.\n");
531 +#else
532 + printk(KERN_INFO "\tHooking IMQ after NAT on POSTROUTING.\n");
533 +#endif
534 +
535 + return 0;
536 +}
537 +
538 +static void __exit imq_unhook(void)
539 +{
540 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
541 + nf_unregister_hook(&imq_ingress_ipv6);
542 + nf_unregister_hook(&imq_egress_ipv6);
543 +#endif
544 + nf_unregister_hook(&imq_ingress_ipv4);
545 + nf_unregister_hook(&imq_egress_ipv4);
546 +
547 + nf_unregister_queue_imq_handler();
548 +}
549 +
550 +static void __exit imq_cleanup_devs(void)
551 +{
552 + rtnl_link_unregister(&imq_link_ops);
553 + memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
554 +}
555 +
556 +static void __exit imq_exit_module(void)
557 +{
558 + imq_unhook();
559 + imq_cleanup_devs();
560 + printk(KERN_INFO "IMQ driver unloaded successfully.\n");
561 +}
562 +
563 +module_init(imq_init_module);
564 +module_exit(imq_exit_module);
565 +
566 +module_param(numdevs, int, 0);
567 +MODULE_PARM_DESC(numdevs, "number of IMQ devices (how many imq* devices will "
568 + "be created)");
569 +MODULE_AUTHOR("http://www.linuximq.net");
570 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See "
571 + "http://www.linuximq.net/ for more information.");
572 +MODULE_LICENSE("GPL");
573 +MODULE_ALIAS_RTNL_LINK("imq");
574 +
575 --- a/drivers/net/Kconfig
576 +++ b/drivers/net/Kconfig
577 @@ -109,6 +109,129 @@ config EQUALIZER
578 To compile this driver as a module, choose M here: the module
579 will be called eql. If unsure, say N.
580
581 +config IMQ
582 + tristate "IMQ (intermediate queueing device) support"
583 + depends on NETDEVICES && NETFILTER
584 + ---help---
585 + The IMQ device(s) is used as placeholder for QoS queueing
586 + disciplines. Every packet entering/leaving the IP stack can be
587 + directed through the IMQ device where it's enqueued/dequeued to the
588 + attached qdisc. This allows you to treat network devices as classes
589 + and distribute bandwidth among them. Iptables is used to specify
590 + through which IMQ device, if any, packets travel.
591 +
592 + More information at: http://www.linuximq.net/
593 +
594 + To compile this driver as a module, choose M here: the module
595 + will be called imq. If unsure, say N.
596 +
597 +choice
598 + prompt "IMQ behavior (PRE/POSTROUTING)"
599 + depends on IMQ
600 + default IMQ_BEHAVIOR_AB
601 + help
602 +
603 + This settings defines how IMQ behaves in respect to its
604 + hooking in PREROUTING and POSTROUTING.
605 +
606 + IMQ can work in any of the following ways:
607 +
608 + PREROUTING | POSTROUTING
609 + -----------------|-------------------
610 + #1 After NAT | After NAT
611 + #2 After NAT | Before NAT
612 + #3 Before NAT | After NAT
613 + #4 Before NAT | Before NAT
614 +
615 + The default behavior is to hook before NAT on PREROUTING
616 + and after NAT on POSTROUTING (#3).
617 +
618 + This settings are specially usefull when trying to use IMQ
619 + to shape NATed clients.
620 +
621 + More information can be found at: www.linuximq.net
622 +
623 + If not sure leave the default settings alone.
624 +
625 +config IMQ_BEHAVIOR_AA
626 + bool "IMQ AA"
627 + help
628 + This settings defines how IMQ behaves in respect to its
629 + hooking in PREROUTING and POSTROUTING.
630 +
631 + Choosing this option will make IMQ hook like this:
632 +
633 + PREROUTING: After NAT
634 + POSTROUTING: After NAT
635 +
636 + More information can be found at: www.linuximq.net
637 +
638 + If not sure leave the default settings alone.
639 +
640 +config IMQ_BEHAVIOR_AB
641 + bool "IMQ AB"
642 + help
643 + This settings defines how IMQ behaves in respect to its
644 + hooking in PREROUTING and POSTROUTING.
645 +
646 + Choosing this option will make IMQ hook like this:
647 +
648 + PREROUTING: After NAT
649 + POSTROUTING: Before NAT
650 +
651 + More information can be found at: www.linuximq.net
652 +
653 + If not sure leave the default settings alone.
654 +
655 +config IMQ_BEHAVIOR_BA
656 + bool "IMQ BA"
657 + help
658 + This settings defines how IMQ behaves in respect to its
659 + hooking in PREROUTING and POSTROUTING.
660 +
661 + Choosing this option will make IMQ hook like this:
662 +
663 + PREROUTING: Before NAT
664 + POSTROUTING: After NAT
665 +
666 + More information can be found at: www.linuximq.net
667 +
668 + If not sure leave the default settings alone.
669 +
670 +config IMQ_BEHAVIOR_BB
671 + bool "IMQ BB"
672 + help
673 + This settings defines how IMQ behaves in respect to its
674 + hooking in PREROUTING and POSTROUTING.
675 +
676 + Choosing this option will make IMQ hook like this:
677 +
678 + PREROUTING: Before NAT
679 + POSTROUTING: Before NAT
680 +
681 + More information can be found at: www.linuximq.net
682 +
683 + If not sure leave the default settings alone.
684 +
685 +endchoice
686 +
687 +config IMQ_NUM_DEVS
688 +
689 + int "Number of IMQ devices"
690 + range 2 16
691 + depends on IMQ
692 + default "16"
693 + help
694 +
695 + This settings defines how many IMQ devices will be
696 + created.
697 +
698 + The default value is 16.
699 +
700 + More information can be found at: www.linuximq.net
701 +
702 + If not sure leave the default settings alone.
703 +
704 config TUN
705 tristate "Universal TUN/TAP device driver support"
706 select CRC32
707 --- a/drivers/net/Makefile
708 +++ b/drivers/net/Makefile
709 @@ -160,6 +160,7 @@ obj-$(CONFIG_SLHC) += slhc.o
710 obj-$(CONFIG_XEN_NETDEV_FRONTEND) += xen-netfront.o
711
712 obj-$(CONFIG_DUMMY) += dummy.o
713 +obj-$(CONFIG_IMQ) += imq.o
714 obj-$(CONFIG_IFB) += ifb.o
715 obj-$(CONFIG_MACVLAN) += macvlan.o
716 obj-$(CONFIG_DE600) += de600.o
717 --- /dev/null
718 +++ b/include/linux/imq.h
719 @@ -0,0 +1,13 @@
720 +#ifndef _IMQ_H
721 +#define _IMQ_H
722 +
723 +/* IFMASK (16 device indexes, 0 to 15) and flag(s) fit in 5 bits */
724 +#define IMQ_F_BITS 5
725 +
726 +#define IMQ_F_IFMASK 0x0f
727 +#define IMQ_F_ENQUEUE 0x10
728 +
729 +#define IMQ_MAX_DEVS (IMQ_F_IFMASK + 1)
730 +
731 +#endif /* _IMQ_H */
732 +
733 --- /dev/null
734 +++ b/include/linux/netfilter_ipv4/ipt_IMQ.h
735 @@ -0,0 +1,10 @@
736 +#ifndef _IPT_IMQ_H
737 +#define _IPT_IMQ_H
738 +
739 +/* Backwards compatibility for old userspace */
740 +#include <linux/netfilter/xt_IMQ.h>
741 +
742 +#define ipt_imq_info xt_imq_info
743 +
744 +#endif /* _IPT_IMQ_H */
745 +
746 --- /dev/null
747 +++ b/include/linux/netfilter_ipv6/ip6t_IMQ.h
748 @@ -0,0 +1,10 @@
749 +#ifndef _IP6T_IMQ_H
750 +#define _IP6T_IMQ_H
751 +
752 +/* Backwards compatibility for old userspace */
753 +#include <linux/netfilter/xt_IMQ.h>
754 +
755 +#define ip6t_imq_info xt_imq_info
756 +
757 +#endif /* _IP6T_IMQ_H */
758 +
759 --- a/include/linux/skbuff.h
760 +++ b/include/linux/skbuff.h
761 @@ -29,6 +29,9 @@
762 #include <linux/rcupdate.h>
763 #include <linux/dmaengine.h>
764 #include <linux/hrtimer.h>
765 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
766 +#include <linux/imq.h>
767 +#endif
768
769 /* Don't change this without changing skb_csum_unnecessary! */
770 #define CHECKSUM_NONE 0
771 @@ -331,6 +334,9 @@ struct sk_buff {
772 * first. This is owned by whoever has the skb queued ATM.
773 */
774 char cb[48];
775 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
776 + void *cb_next;
777 +#endif
778
779 unsigned int len,
780 data_len;
781 @@ -363,6 +369,9 @@ struct sk_buff {
782 struct nf_conntrack *nfct;
783 struct sk_buff *nfct_reasm;
784 #endif
785 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
786 + struct nf_queue_entry *nf_queue_entry;
787 +#endif
788 #ifdef CONFIG_BRIDGE_NETFILTER
789 struct nf_bridge_info *nf_bridge;
790 #endif
791 @@ -386,6 +395,9 @@ struct sk_buff {
792 kmemcheck_bitfield_end(flags2);
793
794 /* 0/13/14 bit hole */
795 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
796 + __u8 imq_flags:IMQ_F_BITS;
797 +#endif
798
799 #ifdef CONFIG_NET_DMA
800 dma_cookie_t dma_cookie;
801 @@ -441,6 +453,12 @@ static inline struct rtable *skb_rtable(
802 return (struct rtable *)skb_dst(skb);
803 }
804
805 +
806 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
807 +extern int skb_save_cb(struct sk_buff *skb);
808 +extern int skb_restore_cb(struct sk_buff *skb);
809 +#endif
810 +
811 extern void kfree_skb(struct sk_buff *skb);
812 extern void consume_skb(struct sk_buff *skb);
813 extern void __kfree_skb(struct sk_buff *skb);
814 @@ -1976,6 +1994,10 @@ static inline void __nf_copy(struct sk_b
815 dst->nfct_reasm = src->nfct_reasm;
816 nf_conntrack_get_reasm(src->nfct_reasm);
817 #endif
818 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
819 + dst->imq_flags = src->imq_flags;
820 + dst->nf_queue_entry = src->nf_queue_entry;
821 +#endif
822 #ifdef CONFIG_BRIDGE_NETFILTER
823 dst->nf_bridge = src->nf_bridge;
824 nf_bridge_get(src->nf_bridge);
825 --- a/net/core/dev.c
826 +++ b/net/core/dev.c
827 @@ -96,6 +96,9 @@
828 #include <net/net_namespace.h>
829 #include <net/sock.h>
830 #include <linux/rtnetlink.h>
831 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
832 +#include <linux/imq.h>
833 +#endif
834 #include <linux/proc_fs.h>
835 #include <linux/seq_file.h>
836 #include <linux/stat.h>
837 @@ -1686,7 +1689,11 @@ int dev_hard_start_xmit(struct sk_buff *
838 int rc;
839
840 if (likely(!skb->next)) {
841 - if (!list_empty(&ptype_all))
842 + if (!list_empty(&ptype_all)
843 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
844 + && !(skb->imq_flags & IMQ_F_ENQUEUE)
845 +#endif
846 + )
847 dev_queue_xmit_nit(skb, dev);
848
849 if (netif_needs_gso(dev, skb)) {
850 @@ -1771,8 +1778,7 @@ u16 skb_tx_hash(const struct net_device
851 }
852 EXPORT_SYMBOL(skb_tx_hash);
853
854 -static struct netdev_queue *dev_pick_tx(struct net_device *dev,
855 - struct sk_buff *skb)
856 +struct netdev_queue *dev_pick_tx(struct net_device *dev, struct sk_buff *skb)
857 {
858 const struct net_device_ops *ops = dev->netdev_ops;
859 u16 queue_index = 0;
860 @@ -1785,6 +1791,7 @@ static struct netdev_queue *dev_pick_tx(
861 skb_set_queue_mapping(skb, queue_index);
862 return netdev_get_tx_queue(dev, queue_index);
863 }
864 +EXPORT_SYMBOL(dev_pick_tx);
865
866 /**
867 * dev_queue_xmit - transmit a buffer
868 --- a/include/linux/netdevice.h
869 +++ b/include/linux/netdevice.h
870 @@ -1102,6 +1102,7 @@ extern int dev_alloc_name(struct net_de
871 extern int dev_open(struct net_device *dev);
872 extern int dev_close(struct net_device *dev);
873 extern void dev_disable_lro(struct net_device *dev);
874 +extern struct netdev_queue *dev_pick_tx(struct net_device *dev, struct sk_buff *skb);
875 extern int dev_queue_xmit(struct sk_buff *skb);
876 extern int register_netdevice(struct net_device *dev);
877 extern void unregister_netdevice(struct net_device *dev);
878 --- /dev/null
879 +++ b/include/linux/netfilter/xt_IMQ.h
880 @@ -0,0 +1,9 @@
881 +#ifndef _XT_IMQ_H
882 +#define _XT_IMQ_H
883 +
884 +struct xt_imq_info {
885 + unsigned int todev; /* target imq device */
886 +};
887 +
888 +#endif /* _XT_IMQ_H */
889 +
890 --- a/include/net/netfilter/nf_queue.h
891 +++ b/include/net/netfilter/nf_queue.h
892 @@ -13,6 +13,12 @@ struct nf_queue_entry {
893 struct net_device *indev;
894 struct net_device *outdev;
895 int (*okfn)(struct sk_buff *);
896 +
897 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
898 + int (*next_outfn)(struct nf_queue_entry *entry,
899 + unsigned int queuenum);
900 + unsigned int next_queuenum;
901 +#endif
902 };
903
904 #define nf_queue_entry_reroute(x) ((void *)x + sizeof(struct nf_queue_entry))
905 @@ -30,5 +36,11 @@ extern int nf_unregister_queue_handler(u
906 const struct nf_queue_handler *qh);
907 extern void nf_unregister_queue_handlers(const struct nf_queue_handler *qh);
908 extern void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict);
909 +extern void nf_queue_entry_release_refs(struct nf_queue_entry *entry);
910 +
911 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
912 +extern void nf_register_queue_imq_handler(const struct nf_queue_handler *qh);
913 +extern void nf_unregister_queue_imq_handler(void);
914 +#endif
915
916 #endif /* _NF_QUEUE_H */
917 --- a/net/core/skbuff.c
918 +++ b/net/core/skbuff.c
919 @@ -72,6 +72,9 @@
920
921 static struct kmem_cache *skbuff_head_cache __read_mostly;
922 static struct kmem_cache *skbuff_fclone_cache __read_mostly;
923 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
924 +static struct kmem_cache *skbuff_cb_store_cache __read_mostly;
925 +#endif
926
927 static void sock_pipe_buf_release(struct pipe_inode_info *pipe,
928 struct pipe_buffer *buf)
929 @@ -91,6 +94,80 @@ static int sock_pipe_buf_steal(struct pi
930 return 1;
931 }
932
933 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
934 +/* Control buffer save/restore for IMQ devices */
935 +struct skb_cb_table {
936 + void *cb_next;
937 + atomic_t refcnt;
938 + char cb[48];
939 +};
940 +
941 +static DEFINE_SPINLOCK(skb_cb_store_lock);
942 +
943 +int skb_save_cb(struct sk_buff *skb)
944 +{
945 + struct skb_cb_table *next;
946 +
947 + next = kmem_cache_alloc(skbuff_cb_store_cache, GFP_ATOMIC);
948 + if (!next)
949 + return -ENOMEM;
950 +
951 + BUILD_BUG_ON(sizeof(skb->cb) != sizeof(next->cb));
952 +
953 + memcpy(next->cb, skb->cb, sizeof(skb->cb));
954 + next->cb_next = skb->cb_next;
955 +
956 + atomic_set(&next->refcnt, 1);
957 +
958 + skb->cb_next = next;
959 + return 0;
960 +}
961 +EXPORT_SYMBOL(skb_save_cb);
962 +
963 +int skb_restore_cb(struct sk_buff *skb)
964 +{
965 + struct skb_cb_table *next;
966 +
967 + if (!skb->cb_next)
968 + return 0;
969 +
970 + next = skb->cb_next;
971 +
972 + BUILD_BUG_ON(sizeof(skb->cb) != sizeof(next->cb));
973 +
974 + memcpy(skb->cb, next->cb, sizeof(skb->cb));
975 + skb->cb_next = next->cb_next;
976 +
977 + spin_lock(&skb_cb_store_lock);
978 +
979 + if (atomic_dec_and_test(&next->refcnt)) {
980 + kmem_cache_free(skbuff_cb_store_cache, next);
981 + }
982 +
983 + spin_unlock(&skb_cb_store_lock);
984 +
985 + return 0;
986 +}
987 +EXPORT_SYMBOL(skb_restore_cb);
988 +
989 +static void skb_copy_stored_cb(struct sk_buff *new, struct sk_buff *old)
990 +{
991 + struct skb_cb_table *next;
992 +
993 + if (!old->cb_next) {
994 + new->cb_next = 0;
995 + return;
996 + }
997 +
998 + spin_lock(&skb_cb_store_lock);
999 +
1000 + next = old->cb_next;
1001 + atomic_inc(&next->refcnt);
1002 + new->cb_next = next;
1003 +
1004 + spin_unlock(&skb_cb_store_lock);
1005 +}
1006 +#endif
1007
1008 /* Pipe buffer operations for a socket. */
1009 static struct pipe_buf_operations sock_pipe_buf_ops = {
1010 @@ -398,6 +475,15 @@ static void skb_release_head_state(struc
1011 WARN_ON(in_irq());
1012 skb->destructor(skb);
1013 }
1014 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1015 + /* This should not happen. When it does, avoid memleak by restoring
1016 + the chain of cb-backups. */
1017 + while(skb->cb_next != NULL) {
1018 + printk(KERN_WARNING "kfree_skb: skb->cb_next: %08x\n",
1019 + skb->cb_next);
1020 + skb_restore_cb(skb);
1021 + }
1022 +#endif
1023 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
1024 nf_conntrack_put(skb->nfct);
1025 nf_conntrack_put_reasm(skb->nfct_reasm);
1026 @@ -535,6 +621,9 @@ static void __copy_skb_header(struct sk_
1027 new->sp = secpath_get(old->sp);
1028 #endif
1029 memcpy(new->cb, old->cb, sizeof(old->cb));
1030 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1031 + skb_copy_stored_cb(new, old);
1032 +#endif
1033 new->csum = old->csum;
1034 new->local_df = old->local_df;
1035 new->pkt_type = old->pkt_type;
1036 @@ -2778,6 +2867,13 @@ void __init skb_init(void)
1037 0,
1038 SLAB_HWCACHE_ALIGN|SLAB_PANIC,
1039 NULL);
1040 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1041 + skbuff_cb_store_cache = kmem_cache_create("skbuff_cb_store_cache",
1042 + sizeof(struct skb_cb_table),
1043 + 0,
1044 + SLAB_HWCACHE_ALIGN|SLAB_PANIC,
1045 + NULL);
1046 +#endif
1047 }
1048
1049 /**
1050 --- a/net/netfilter/Kconfig
1051 +++ b/net/netfilter/Kconfig
1052 @@ -396,6 +396,18 @@ config NETFILTER_XT_TARGET_LED
1053 For more information on the LEDs available on your system, see
1054 Documentation/leds-class.txt
1055
1056 +config NETFILTER_XT_TARGET_IMQ
1057 + tristate '"IMQ" target support'
1058 + depends on NETFILTER_XTABLES
1059 + depends on IP_NF_MANGLE || IP6_NF_MANGLE
1060 + select IMQ
1061 + default m if NETFILTER_ADVANCED=n
1062 + help
1063 + This option adds a `IMQ' target which is used to specify if and
1064 + to which imq device packets should get enqueued/dequeued.
1065 +
1066 + To compile it as a module, choose M here. If unsure, say N.
1067 +
1068 config NETFILTER_XT_TARGET_MARK
1069 tristate '"MARK" target support'
1070 default m if NETFILTER_ADVANCED=n
1071 --- a/net/netfilter/Makefile
1072 +++ b/net/netfilter/Makefile
1073 @@ -46,6 +46,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CONNMAR
1074 obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
1075 obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
1076 obj-$(CONFIG_NETFILTER_XT_TARGET_HL) += xt_HL.o
1077 +obj-$(CONFIG_NETFILTER_XT_TARGET_IMQ) += xt_IMQ.o
1078 obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
1079 obj-$(CONFIG_NETFILTER_XT_TARGET_MARK) += xt_MARK.o
1080 obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
1081 --- a/net/netfilter/nf_queue.c
1082 +++ b/net/netfilter/nf_queue.c
1083 @@ -20,6 +20,26 @@ static const struct nf_queue_handler *qu
1084
1085 static DEFINE_MUTEX(queue_handler_mutex);
1086
1087 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1088 +static const struct nf_queue_handler *queue_imq_handler;
1089 +
1090 +void nf_register_queue_imq_handler(const struct nf_queue_handler *qh)
1091 +{
1092 + mutex_lock(&queue_handler_mutex);
1093 + rcu_assign_pointer(queue_imq_handler, qh);
1094 + mutex_unlock(&queue_handler_mutex);
1095 +}
1096 +EXPORT_SYMBOL(nf_register_queue_imq_handler);
1097 +
1098 +void nf_unregister_queue_imq_handler(void)
1099 +{
1100 + mutex_lock(&queue_handler_mutex);
1101 + rcu_assign_pointer(queue_imq_handler, NULL);
1102 + mutex_unlock(&queue_handler_mutex);
1103 +}
1104 +EXPORT_SYMBOL(nf_unregister_queue_imq_handler);
1105 +#endif
1106 +
1107 /* return EBUSY when somebody else is registered, return EEXIST if the
1108 * same handler is registered, return 0 in case of success. */
1109 int nf_register_queue_handler(u_int8_t pf, const struct nf_queue_handler *qh)
1110 @@ -80,7 +100,7 @@ void nf_unregister_queue_handlers(const
1111 }
1112 EXPORT_SYMBOL_GPL(nf_unregister_queue_handlers);
1113
1114 -static void nf_queue_entry_release_refs(struct nf_queue_entry *entry)
1115 +void nf_queue_entry_release_refs(struct nf_queue_entry *entry)
1116 {
1117 /* Release those devices we held, or Alexey will kill me. */
1118 if (entry->indev)
1119 @@ -100,6 +120,7 @@ static void nf_queue_entry_release_refs(
1120 /* Drop reference to owner of hook which queued us. */
1121 module_put(entry->elem->owner);
1122 }
1123 +EXPORT_SYMBOL_GPL(nf_queue_entry_release_refs);
1124
1125 /*
1126 * Any packet that leaves via this function must come back
1127 @@ -121,12 +142,26 @@ static int __nf_queue(struct sk_buff *sk
1128 #endif
1129 const struct nf_afinfo *afinfo;
1130 const struct nf_queue_handler *qh;
1131 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1132 + const struct nf_queue_handler *qih = NULL;
1133 +#endif
1134
1135 /* QUEUE == DROP if noone is waiting, to be safe. */
1136 rcu_read_lock();
1137
1138 qh = rcu_dereference(queue_handler[pf]);
1139 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1140 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1141 + if (pf == PF_INET || pf == PF_INET6)
1142 +#else
1143 + if (pf == PF_INET)
1144 +#endif
1145 + qih = rcu_dereference(queue_imq_handler);
1146 +
1147 + if (!qh && !qih)
1148 +#else /* !IMQ */
1149 if (!qh)
1150 +#endif
1151 goto err_unlock;
1152
1153 afinfo = nf_get_afinfo(pf);
1154 @@ -145,6 +180,10 @@ static int __nf_queue(struct sk_buff *sk
1155 .indev = indev,
1156 .outdev = outdev,
1157 .okfn = okfn,
1158 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1159 + .next_outfn = qh ? qh->outfn : NULL,
1160 + .next_queuenum = queuenum,
1161 +#endif
1162 };
1163
1164 /* If it's going away, ignore hook. */
1165 @@ -170,8 +209,19 @@ static int __nf_queue(struct sk_buff *sk
1166 }
1167 #endif
1168 afinfo->saveroute(skb, entry);
1169 +
1170 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1171 + if (qih) {
1172 + status = qih->outfn(entry, queuenum);
1173 + goto imq_skip_queue;
1174 + }
1175 +#endif
1176 +
1177 status = qh->outfn(entry, queuenum);
1178
1179 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
1180 +imq_skip_queue:
1181 +#endif
1182 rcu_read_unlock();
1183
1184 if (status < 0) {
1185 --- /dev/null
1186 +++ b/net/netfilter/xt_IMQ.c
1187 @@ -0,0 +1,73 @@
1188 +/*
1189 + * This target marks packets to be enqueued to an imq device
1190 + */
1191 +#include <linux/module.h>
1192 +#include <linux/skbuff.h>
1193 +#include <linux/netfilter/x_tables.h>
1194 +#include <linux/netfilter/xt_IMQ.h>
1195 +#include <linux/imq.h>
1196 +
1197 +static unsigned int imq_target(struct sk_buff *pskb,
1198 + const struct xt_target_param *par)
1199 +{
1200 + const struct xt_imq_info *mr = par->targinfo;
1201 +
1202 + pskb->imq_flags = (mr->todev & IMQ_F_IFMASK) | IMQ_F_ENQUEUE;
1203 +
1204 + return XT_CONTINUE;
1205 +}
1206 +
1207 +static bool imq_checkentry(const struct xt_tgchk_param *par)
1208 +{
1209 + struct xt_imq_info *mr = par->targinfo;
1210 +
1211 + if (mr->todev > IMQ_MAX_DEVS - 1) {
1212 + printk(KERN_WARNING
1213 + "IMQ: invalid device specified, highest is %u\n",
1214 + IMQ_MAX_DEVS - 1);
1215 + return 0;
1216 + }
1217 +
1218 + return 1;
1219 +}
1220 +
1221 +static struct xt_target xt_imq_reg[] __read_mostly = {
1222 + {
1223 + .name = "IMQ",
1224 + .family = AF_INET,
1225 + .checkentry = imq_checkentry,
1226 + .target = imq_target,
1227 + .targetsize = sizeof(struct xt_imq_info),
1228 + .table = "mangle",
1229 + .me = THIS_MODULE
1230 + },
1231 + {
1232 + .name = "IMQ",
1233 + .family = AF_INET6,
1234 + .checkentry = imq_checkentry,
1235 + .target = imq_target,
1236 + .targetsize = sizeof(struct xt_imq_info),
1237 + .table = "mangle",
1238 + .me = THIS_MODULE
1239 + },
1240 +};
1241 +
1242 +static int __init imq_init(void)
1243 +{
1244 + return xt_register_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg));
1245 +}
1246 +
1247 +static void __exit imq_fini(void)
1248 +{
1249 + xt_unregister_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg));
1250 +}
1251 +
1252 +module_init(imq_init);
1253 +module_exit(imq_fini);
1254 +
1255 +MODULE_AUTHOR("http://www.linuximq.net");
1256 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
1257 +MODULE_LICENSE("GPL");
1258 +MODULE_ALIAS("ipt_IMQ");
1259 +MODULE_ALIAS("ip6t_IMQ");
1260 +