[kernel] generic-2.6: even newer IMQ patch for 2.6.25 and 2.6.26
[openwrt/svn-archive/archive.git] / target / linux / generic-2.6 / patches-2.6.26 / 150-netfilter_imq.patch
1
2
3 ---
4
5 drivers/net/Kconfig | 123 ++++++++
6 drivers/net/Makefile | 1
7 drivers/net/imq.c | 474 +++++++++++++++++++++++++++++++
8 include/linux/imq.h | 9 +
9 include/linux/netfilter_ipv4/ipt_IMQ.h | 8 +
10 include/linux/netfilter_ipv6/ip6t_IMQ.h | 8 +
11 include/linux/skbuff.h | 8 +
12 net/core/dev.c | 9 +
13 net/ipv4/netfilter/Kconfig | 11 +
14 net/ipv4/netfilter/Makefile | 1
15 net/ipv4/netfilter/ipt_IMQ.c | 69 +++++
16 net/ipv6/netfilter/Kconfig | 9 +
17 net/ipv6/netfilter/Makefile | 1
18 net/ipv6/netfilter/ip6t_IMQ.c | 69 +++++
19 net/sched/sch_generic.c | 1
20 15 files changed, 800 insertions(+), 1 deletions(-)
21 create mode 100644 drivers/net/imq.c
22 create mode 100644 include/linux/imq.h
23 create mode 100644 include/linux/netfilter_ipv4/ipt_IMQ.h
24 create mode 100644 include/linux/netfilter_ipv6/ip6t_IMQ.h
25 create mode 100644 net/ipv4/netfilter/ipt_IMQ.c
26 create mode 100644 net/ipv6/netfilter/ip6t_IMQ.c
27
28
29 --- a/drivers/net/Kconfig
30 +++ b/drivers/net/Kconfig
31 @@ -117,6 +117,129 @@
32 To compile this driver as a module, choose M here: the module
33 will be called eql. If unsure, say N.
34
35 +config IMQ
36 + tristate "IMQ (intermediate queueing device) support"
37 + depends on NETDEVICES && NETFILTER
38 + ---help---
39 + The IMQ device(s) is used as placeholder for QoS queueing
40 + disciplines. Every packet entering/leaving the IP stack can be
41 + directed through the IMQ device where it's enqueued/dequeued to the
42 + attached qdisc. This allows you to treat network devices as classes
43 + and distribute bandwidth among them. Iptables is used to specify
44 + through which IMQ device, if any, packets travel.
45 +
46 + More information at: http://www.linuximq.net/
47 +
48 + To compile this driver as a module, choose M here: the module
49 + will be called imq. If unsure, say N.
50 +
51 +choice
52 + prompt "IMQ behavior (PRE/POSTROUTING)"
53 + depends on IMQ
54 + default IMQ_BEHAVIOR_BB
55 + help
56 +
57 + This settings defines how IMQ behaves in respect to its
58 + hooking in PREROUTING and POSTROUTING.
59 +
60 + IMQ can work in any of the following ways:
61 +
62 + PREROUTING | POSTROUTING
63 + -----------------|-------------------
64 + #1 After NAT | After NAT
65 + #2 After NAT | Before NAT
66 + #3 Before NAT | After NAT
67 + #4 Before NAT | Before NAT
68 +
69 + The default behavior is to hook before NAT on PREROUTING
70 + and after NAT on POSTROUTING (#3).
71 +
72 + This settings are specially usefull when trying to use IMQ
73 + to shape NATed clients.
74 +
75 + More information can be found at: www.linuximq.net
76 +
77 + If not sure leave the default settings alone.
78 +
79 +config IMQ_BEHAVIOR_AA
80 + bool "IMQ AA"
81 + help
82 + This settings defines how IMQ behaves in respect to its
83 + hooking in PREROUTING and POSTROUTING.
84 +
85 + Choosing this option will make IMQ hook like this:
86 +
87 + PREROUTING: After NAT
88 + POSTROUTING: After NAT
89 +
90 + More information can be found at: www.linuximq.net
91 +
92 + If not sure leave the default settings alone.
93 +
94 +config IMQ_BEHAVIOR_AB
95 + bool "IMQ AB"
96 + help
97 + This settings defines how IMQ behaves in respect to its
98 + hooking in PREROUTING and POSTROUTING.
99 +
100 + Choosing this option will make IMQ hook like this:
101 +
102 + PREROUTING: After NAT
103 + POSTROUTING: Before NAT
104 +
105 + More information can be found at: www.linuximq.net
106 +
107 + If not sure leave the default settings alone.
108 +
109 +config IMQ_BEHAVIOR_BA
110 + bool "IMQ BA"
111 + help
112 + This settings defines how IMQ behaves in respect to its
113 + hooking in PREROUTING and POSTROUTING.
114 +
115 + Choosing this option will make IMQ hook like this:
116 +
117 + PREROUTING: Before NAT
118 + POSTROUTING: After NAT
119 +
120 + More information can be found at: www.linuximq.net
121 +
122 + If not sure leave the default settings alone.
123 +
124 +config IMQ_BEHAVIOR_BB
125 + bool "IMQ BB"
126 + help
127 + This settings defines how IMQ behaves in respect to its
128 + hooking in PREROUTING and POSTROUTING.
129 +
130 + Choosing this option will make IMQ hook like this:
131 +
132 + PREROUTING: Before NAT
133 + POSTROUTING: Before NAT
134 +
135 + More information can be found at: www.linuximq.net
136 +
137 + If not sure leave the default settings alone.
138 +
139 +endchoice
140 +
141 +config IMQ_NUM_DEVS
142 +
143 + int "Number of IMQ devices"
144 + range 2 16
145 + depends on IMQ
146 + default "16"
147 + help
148 +
149 + This settings defines how many IMQ devices will be
150 + created.
151 +
152 + The default value is 16.
153 +
154 + More information can be found at: www.linuximq.net
155 +
156 + If not sure leave the default settings alone.
157 +
158 config TUN
159 tristate "Universal TUN/TAP device driver support"
160 select CRC32
161 --- a/drivers/net/Makefile
162 +++ b/drivers/net/Makefile
163 @@ -142,6 +142,7 @@
164 obj-$(CONFIG_XEN_NETDEV_FRONTEND) += xen-netfront.o
165
166 obj-$(CONFIG_DUMMY) += dummy.o
167 +obj-$(CONFIG_IMQ) += imq.o
168 obj-$(CONFIG_IFB) += ifb.o
169 obj-$(CONFIG_MACVLAN) += macvlan.o
170 obj-$(CONFIG_DE600) += de600.o
171 --- /dev/null
172 +++ b/drivers/net/imq.c
173 @@ -0,0 +1,474 @@
174 +/*
175 + * Pseudo-driver for the intermediate queue device.
176 + *
177 + * This program is free software; you can redistribute it and/or
178 + * modify it under the terms of the GNU General Public License
179 + * as published by the Free Software Foundation; either version
180 + * 2 of the License, or (at your option) any later version.
181 + *
182 + * Authors: Patrick McHardy, <kaber@trash.net>
183 + *
184 + * The first version was written by Martin Devera, <devik@cdi.cz>
185 + *
186 + * Credits: Jan Rafaj <imq2t@cedric.vabo.cz>
187 + * - Update patch to 2.4.21
188 + * Sebastian Strollo <sstrollo@nortelnetworks.com>
189 + * - Fix "Dead-loop on netdevice imq"-issue
190 + * Marcel Sebek <sebek64@post.cz>
191 + * - Update to 2.6.2-rc1
192 + *
193 + * After some time of inactivity there is a group taking care
194 + * of IMQ again: http://www.linuximq.net
195 + *
196 + *
197 + * 2004/06/30 - New version of IMQ patch to kernels <=2.6.7
198 + * including the following changes:
199 + *
200 + * - Correction of ipv6 support "+"s issue (Hasso Tepper)
201 + * - Correction of imq_init_devs() issue that resulted in
202 + * kernel OOPS unloading IMQ as module (Norbert Buchmuller)
203 + * - Addition of functionality to choose number of IMQ devices
204 + * during kernel config (Andre Correa)
205 + * - Addition of functionality to choose how IMQ hooks on
206 + * PRE and POSTROUTING (after or before NAT) (Andre Correa)
207 + * - Cosmetic corrections (Norbert Buchmuller) (Andre Correa)
208 + *
209 + *
210 + * 2005/12/16 - IMQ versions between 2.6.7 and 2.6.13 were
211 + * released with almost no problems. 2.6.14-x was released
212 + * with some important changes: nfcache was removed; After
213 + * some weeks of trouble we figured out that some IMQ fields
214 + * in skb were missing in skbuff.c - skb_clone and copy_skb_header.
215 + * These functions are correctly patched by this new patch version.
216 + *
217 + * Thanks for all who helped to figure out all the problems with
218 + * 2.6.14.x: Patrick McHardy, Rune Kock, VeNoMouS, Max CtRiX,
219 + * Kevin Shanahan, Richard Lucassen, Valery Dachev (hopefully
220 + * I didn't forget anybody). I apologize again for my lack of time.
221 + *
222 + *
223 + * 2008/06/07 - Changed imq.c to use qdisc_run() instead of
224 + * qdisc_restart() and moved qdisc_run() to tasklet to avoid
225 + * recursive locking. (Jussi Kivilinna)
226 + *
227 + * 2008/06/14 - New initialization routines to fix 'rmmod' not
228 + * working anymore. Used code from ifb.c (Jussi Kivilinna)
229 + *
230 + *
231 + * More info at: http://www.linuximq.net/ (Andre Correa)
232 + */
233 +
234 +#include <linux/module.h>
235 +#include <linux/kernel.h>
236 +#include <linux/moduleparam.h>
237 +#include <linux/skbuff.h>
238 +#include <linux/netdevice.h>
239 +#include <linux/rtnetlink.h>
240 +#include <linux/if_arp.h>
241 +#include <linux/netfilter.h>
242 +#include <linux/netfilter_ipv4.h>
243 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
244 + #include <linux/netfilter_ipv6.h>
245 +#endif
246 +#include <linux/imq.h>
247 +#include <net/pkt_sched.h>
248 +#include <net/netfilter/nf_queue.h>
249 +
250 +struct imq_private {
251 + struct tasklet_struct tasklet;
252 + int tasklet_pending;
253 +};
254 +
255 +static nf_hookfn imq_nf_hook;
256 +
257 +static struct nf_hook_ops imq_ingress_ipv4 = {
258 + .hook = imq_nf_hook,
259 + .owner = THIS_MODULE,
260 + .pf = PF_INET,
261 + .hooknum = NF_INET_PRE_ROUTING,
262 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
263 + .priority = NF_IP_PRI_MANGLE + 1
264 +#else
265 + .priority = NF_IP_PRI_NAT_DST + 1
266 +#endif
267 +};
268 +
269 +static struct nf_hook_ops imq_egress_ipv4 = {
270 + .hook = imq_nf_hook,
271 + .owner = THIS_MODULE,
272 + .pf = PF_INET,
273 + .hooknum = NF_INET_POST_ROUTING,
274 +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
275 + .priority = NF_IP_PRI_LAST
276 +#else
277 + .priority = NF_IP_PRI_NAT_SRC - 1
278 +#endif
279 +};
280 +
281 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
282 +static struct nf_hook_ops imq_ingress_ipv6 = {
283 + .hook = imq_nf_hook,
284 + .owner = THIS_MODULE,
285 + .pf = PF_INET6,
286 + .hooknum = NF_INET_PRE_ROUTING,
287 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
288 + .priority = NF_IP6_PRI_MANGLE + 1
289 +#else
290 + .priority = NF_IP6_PRI_NAT_DST + 1
291 +#endif
292 +};
293 +
294 +static struct nf_hook_ops imq_egress_ipv6 = {
295 + .hook = imq_nf_hook,
296 + .owner = THIS_MODULE,
297 + .pf = PF_INET6,
298 + .hooknum = NF_INET_POST_ROUTING,
299 +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
300 + .priority = NF_IP6_PRI_LAST
301 +#else
302 + .priority = NF_IP6_PRI_NAT_SRC - 1
303 +#endif
304 +};
305 +#endif
306 +
307 +#if defined(CONFIG_IMQ_NUM_DEVS)
308 +static unsigned int numdevs = CONFIG_IMQ_NUM_DEVS;
309 +#else
310 +static unsigned int numdevs = IMQ_MAX_DEVS;
311 +#endif
312 +
313 +static struct net_device *imq_devs_cache[IMQ_MAX_DEVS];
314 +
315 +static struct net_device_stats *imq_get_stats(struct net_device *dev)
316 +{
317 + return &dev->stats;
318 +}
319 +
320 +/* called for packets kfree'd in qdiscs at places other than enqueue */
321 +static void imq_skb_destructor(struct sk_buff *skb)
322 +{
323 + struct nf_queue_entry *entry = skb->nf_queue_entry;
324 +
325 + if (entry) {
326 + if (entry->indev)
327 + dev_put(entry->indev);
328 + if (entry->outdev)
329 + dev_put(entry->outdev);
330 + kfree(entry);
331 + }
332 +}
333 +
334 +static int imq_dev_xmit(struct sk_buff *skb, struct net_device *dev)
335 +{
336 + dev->stats.tx_bytes += skb->len;
337 + dev->stats.tx_packets++;
338 +
339 + skb->imq_flags = 0;
340 + skb->destructor = NULL;
341 +
342 + dev->trans_start = jiffies;
343 + nf_reinject(skb->nf_queue_entry, NF_ACCEPT);
344 + return 0;
345 +}
346 +
347 +static int imq_nf_queue(struct nf_queue_entry *entry, unsigned queue_num)
348 +{
349 + struct net_device *dev;
350 + struct imq_private *priv;
351 + struct sk_buff *skb2 = NULL;
352 + struct Qdisc *q;
353 + unsigned int index = entry->skb->imq_flags & IMQ_F_IFMASK;
354 + int ret = -1;
355 +
356 + if (index > numdevs)
357 + return -1;
358 +
359 + /* check for imq device by index from cache */
360 + dev = imq_devs_cache[index];
361 + if (!dev) {
362 + char buf[8];
363 +
364 + /* get device by name and cache result */
365 + snprintf(buf, sizeof(buf), "imq%d", index);
366 + dev = dev_get_by_name(&init_net, buf);
367 + if (!dev) {
368 + /* not found ?!*/
369 + BUG();
370 + return -1;
371 + }
372 +
373 + imq_devs_cache[index] = dev;
374 + }
375 +
376 + priv = netdev_priv(dev);
377 + if (!(dev->flags & IFF_UP)) {
378 + entry->skb->imq_flags = 0;
379 + nf_reinject(entry, NF_ACCEPT);
380 + return 0;
381 + }
382 + dev->last_rx = jiffies;
383 +
384 + if (entry->skb->destructor) {
385 + skb2 = entry->skb;
386 + entry->skb = skb_clone(entry->skb, GFP_ATOMIC);
387 + if (!entry->skb)
388 + return -1;
389 + }
390 + entry->skb->nf_queue_entry = entry;
391 +
392 + dev->stats.rx_bytes += entry->skb->len;
393 + dev->stats.rx_packets++;
394 +
395 + spin_lock_bh(&dev->queue_lock);
396 + q = dev->qdisc;
397 + if (q->enqueue) {
398 + q->enqueue(skb_get(entry->skb), q);
399 + if (skb_shared(entry->skb)) {
400 + entry->skb->destructor = imq_skb_destructor;
401 + kfree_skb(entry->skb);
402 + ret = 0;
403 + }
404 + }
405 + if (!test_and_set_bit(1, &priv->tasklet_pending))
406 + tasklet_schedule(&priv->tasklet);
407 + spin_unlock_bh(&dev->queue_lock);
408 +
409 + if (skb2)
410 + kfree_skb(ret ? entry->skb : skb2);
411 +
412 + return ret;
413 +}
414 +
415 +static struct nf_queue_handler nfqh = {
416 + .name = "imq",
417 + .outfn = imq_nf_queue,
418 +};
419 +
420 +static void qdisc_run_tasklet(unsigned long arg)
421 +{
422 + struct net_device *dev = (struct net_device *)arg;
423 + struct imq_private *priv = netdev_priv(dev);
424 +
425 + spin_lock(&dev->queue_lock);
426 + qdisc_run(dev);
427 + clear_bit(1, &priv->tasklet_pending);
428 + spin_unlock(&dev->queue_lock);
429 +}
430 +
431 +static unsigned int imq_nf_hook(unsigned int hook, struct sk_buff *pskb,
432 + const struct net_device *indev,
433 + const struct net_device *outdev,
434 + int (*okfn)(struct sk_buff *))
435 +{
436 + if (pskb->imq_flags & IMQ_F_ENQUEUE)
437 + return NF_QUEUE;
438 +
439 + return NF_ACCEPT;
440 +}
441 +
442 +static int imq_close(struct net_device *dev)
443 +{
444 + struct imq_private *priv = netdev_priv(dev);
445 +
446 + tasklet_kill(&priv->tasklet);
447 + netif_stop_queue(dev);
448 +
449 + return 0;
450 +}
451 +
452 +static int imq_open(struct net_device *dev)
453 +{
454 + struct imq_private *priv = netdev_priv(dev);
455 +
456 + tasklet_init(&priv->tasklet, qdisc_run_tasklet, (unsigned long)dev);
457 + netif_start_queue(dev);
458 +
459 + return 0;
460 +}
461 +
462 +static void imq_setup(struct net_device *dev)
463 +{
464 + dev->hard_start_xmit = imq_dev_xmit;
465 + dev->open = imq_open;
466 + dev->get_stats = imq_get_stats;
467 + dev->stop = imq_close;
468 + dev->type = ARPHRD_VOID;
469 + dev->mtu = 16000;
470 + dev->tx_queue_len = 11000;
471 + dev->flags = IFF_NOARP;
472 +}
473 +
474 +static struct rtnl_link_ops imq_link_ops __read_mostly = {
475 + .kind = "imq",
476 + .priv_size = sizeof(struct imq_private),
477 + .setup = imq_setup,
478 +};
479 +
480 +static int __init imq_init_hooks(void)
481 +{
482 + int err;
483 +
484 + err = nf_register_queue_handler(PF_INET, &nfqh);
485 + if (err)
486 + goto err1;
487 +
488 + err = nf_register_hook(&imq_ingress_ipv4);
489 + if (err)
490 + goto err2;
491 +
492 + err = nf_register_hook(&imq_egress_ipv4);
493 + if (err)
494 + goto err3;
495 +
496 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
497 + err = nf_register_queue_handler(PF_INET6, &nfqh);
498 + if (err)
499 + goto err4;
500 +
501 + err = nf_register_hook(&imq_ingress_ipv6);
502 + if (err)
503 + goto err5;
504 +
505 + err = nf_register_hook(&imq_egress_ipv6);
506 + if (err)
507 + goto err6;
508 +#endif
509 +
510 + return 0;
511 +
512 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
513 +err6:
514 + nf_unregister_hook(&imq_ingress_ipv6);
515 +err5:
516 + nf_unregister_queue_handler(PF_INET6, &nfqh);
517 +err4:
518 + nf_unregister_hook(&imq_egress_ipv4);
519 +#endif
520 +err3:
521 + nf_unregister_hook(&imq_ingress_ipv4);
522 +err2:
523 + nf_unregister_queue_handler(PF_INET, &nfqh);
524 +err1:
525 + return err;
526 +}
527 +
528 +static int __init imq_init_one(int index)
529 +{
530 + struct net_device *dev;
531 + int ret;
532 +
533 + dev = alloc_netdev(sizeof(struct imq_private), "imq%d", imq_setup);
534 + if (!dev)
535 + return -ENOMEM;
536 +
537 + ret = dev_alloc_name(dev, dev->name);
538 + if (ret < 0)
539 + goto fail;
540 +
541 + dev->rtnl_link_ops = &imq_link_ops;
542 + ret = register_netdevice(dev);
543 + if (ret < 0)
544 + goto fail;
545 +
546 + return 0;
547 +fail:
548 + free_netdev(dev);
549 + return ret;
550 +}
551 +
552 +static int __init imq_init_devs(void)
553 +{
554 + int err, i;
555 +
556 + if (!numdevs || numdevs > IMQ_MAX_DEVS) {
557 + printk(KERN_ERR "IMQ: numdevs has to be betweed 1 and %u\n",
558 + IMQ_MAX_DEVS);
559 + return -EINVAL;
560 + }
561 +
562 + rtnl_lock();
563 + err = __rtnl_link_register(&imq_link_ops);
564 +
565 + for (i = 0; i < numdevs && !err; i++)
566 + err = imq_init_one(i);
567 +
568 + if (err) {
569 + __rtnl_link_unregister(&imq_link_ops);
570 + memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
571 + }
572 + rtnl_unlock();
573 +
574 + return err;
575 +}
576 +
577 +static int __init imq_init_module(void)
578 +{
579 + int err;
580 +
581 + err = imq_init_devs();
582 + if (err) {
583 + printk(KERN_ERR "IMQ: Error trying imq_init_devs(net)\n");
584 + return err;
585 + }
586 +
587 + err = imq_init_hooks();
588 + if (err) {
589 + printk(KERN_ERR "IMQ: Error trying imq_init_hooks()\n");
590 + rtnl_link_unregister(&imq_link_ops);
591 + memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
592 + return err;
593 + }
594 +
595 + printk(KERN_INFO "IMQ driver loaded successfully.\n");
596 +
597 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
598 + printk(KERN_INFO "\tHooking IMQ before NAT on PREROUTING.\n");
599 +#else
600 + printk(KERN_INFO "\tHooking IMQ after NAT on PREROUTING.\n");
601 +#endif
602 +#if defined(CONFIG_IMQ_BEHAVIOR_AB) || defined(CONFIG_IMQ_BEHAVIOR_BB)
603 + printk(KERN_INFO "\tHooking IMQ before NAT on POSTROUTING.\n");
604 +#else
605 + printk(KERN_INFO "\tHooking IMQ after NAT on POSTROUTING.\n");
606 +#endif
607 +
608 + return 0;
609 +}
610 +
611 +static void __exit imq_unhook(void)
612 +{
613 +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
614 + nf_unregister_hook(&imq_ingress_ipv6);
615 + nf_unregister_hook(&imq_egress_ipv6);
616 + nf_unregister_queue_handler(PF_INET6, &nfqh);
617 +#endif
618 + nf_unregister_hook(&imq_ingress_ipv4);
619 + nf_unregister_hook(&imq_egress_ipv4);
620 + nf_unregister_queue_handler(PF_INET, &nfqh);
621 +}
622 +
623 +static void __exit imq_cleanup_devs(void)
624 +{
625 + rtnl_link_unregister(&imq_link_ops);
626 + memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
627 +}
628 +
629 +static void __exit imq_exit_module(void)
630 +{
631 + imq_unhook();
632 + imq_cleanup_devs();
633 + printk(KERN_INFO "IMQ driver unloaded successfully.\n");
634 +}
635 +
636 +module_init(imq_init_module);
637 +module_exit(imq_exit_module);
638 +
639 +module_param(numdevs, int, 0);
640 +MODULE_PARM_DESC(numdevs, "number of IMQ devices (how many imq* devices will "
641 + "be created)");
642 +MODULE_AUTHOR("http://www.linuximq.net");
643 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See "
644 + "http://www.linuximq.net/ for more information.");
645 +MODULE_LICENSE("GPL");
646 +MODULE_ALIAS_RTNL_LINK("imq");
647 +
648 --- /dev/null
649 +++ b/include/linux/imq.h
650 @@ -0,0 +1,9 @@
651 +#ifndef _IMQ_H
652 +#define _IMQ_H
653 +
654 +#define IMQ_MAX_DEVS 16
655 +
656 +#define IMQ_F_IFMASK 0x7f
657 +#define IMQ_F_ENQUEUE 0x80
658 +
659 +#endif /* _IMQ_H */
660 --- /dev/null
661 +++ b/include/linux/netfilter_ipv4/ipt_IMQ.h
662 @@ -0,0 +1,8 @@
663 +#ifndef _IPT_IMQ_H
664 +#define _IPT_IMQ_H
665 +
666 +struct ipt_imq_info {
667 + unsigned int todev; /* target imq device */
668 +};
669 +
670 +#endif /* _IPT_IMQ_H */
671 --- /dev/null
672 +++ b/include/linux/netfilter_ipv6/ip6t_IMQ.h
673 @@ -0,0 +1,8 @@
674 +#ifndef _IP6T_IMQ_H
675 +#define _IP6T_IMQ_H
676 +
677 +struct ip6t_imq_info {
678 + unsigned int todev; /* target imq device */
679 +};
680 +
681 +#endif /* _IP6T_IMQ_H */
682 --- a/include/linux/skbuff.h
683 +++ b/include/linux/skbuff.h
684 @@ -300,6 +300,10 @@
685 struct nf_conntrack *nfct;
686 struct sk_buff *nfct_reasm;
687 #endif
688 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
689 + unsigned char imq_flags;
690 + struct nf_queue_entry *nf_queue_entry;
691 +#endif
692 #ifdef CONFIG_BRIDGE_NETFILTER
693 struct nf_bridge_info *nf_bridge;
694 #endif
695 @@ -1633,6 +1637,10 @@
696 dst->nfct_reasm = src->nfct_reasm;
697 nf_conntrack_get_reasm(src->nfct_reasm);
698 #endif
699 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
700 + dst->imq_flags = src->imq_flags;
701 + dst->nf_queue_entry = src->nf_queue_entry;
702 +#endif
703 #ifdef CONFIG_BRIDGE_NETFILTER
704 dst->nf_bridge = src->nf_bridge;
705 nf_bridge_get(src->nf_bridge);
706 --- a/net/core/dev.c
707 +++ b/net/core/dev.c
708 @@ -95,6 +95,9 @@
709 #include <net/net_namespace.h>
710 #include <net/sock.h>
711 #include <linux/rtnetlink.h>
712 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
713 +#include <linux/imq.h>
714 +#endif
715 #include <linux/proc_fs.h>
716 #include <linux/seq_file.h>
717 #include <linux/stat.h>
718 @@ -1545,7 +1548,11 @@
719 int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
720 {
721 if (likely(!skb->next)) {
722 - if (!list_empty(&ptype_all))
723 + if (!list_empty(&ptype_all)
724 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
725 + && !(skb->imq_flags & IMQ_F_ENQUEUE)
726 +#endif
727 + )
728 dev_queue_xmit_nit(skb, dev);
729
730 if (netif_needs_gso(dev, skb)) {
731 --- a/net/ipv4/netfilter/Kconfig
732 +++ b/net/ipv4/netfilter/Kconfig
733 @@ -145,6 +145,17 @@
734
735 To compile it as a module, choose M here. If unsure, say N.
736
737 +config IP_NF_TARGET_IMQ
738 + tristate "IMQ target support"
739 + depends on IP_NF_MANGLE
740 + help
741 + This option adds a `IMQ' target which is used to specify if and
742 + to which IMQ device packets should get enqueued/dequeued.
743 +
744 + For more information visit: http://www.linuximq.net/
745 +
746 + To compile it as a module, choose M here. If unsure, say N.
747 +
748 config IP_NF_TARGET_REJECT
749 tristate "REJECT target support"
750 depends on IP_NF_FILTER
751 --- a/net/ipv4/netfilter/Makefile
752 +++ b/net/ipv4/netfilter/Makefile
753 @@ -58,6 +58,7 @@
754 obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
755 obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o
756 obj-$(CONFIG_IP_NF_TARGET_LOG) += ipt_LOG.o
757 +obj-$(CONFIG_IP_NF_TARGET_IMQ) += ipt_IMQ.o
758 obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o
759 obj-$(CONFIG_IP_NF_TARGET_NETMAP) += ipt_NETMAP.o
760 obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
761 --- /dev/null
762 +++ b/net/ipv4/netfilter/ipt_IMQ.c
763 @@ -0,0 +1,69 @@
764 +/*
765 + * This target marks packets to be enqueued to an imq device
766 + */
767 +#include <linux/module.h>
768 +#include <linux/skbuff.h>
769 +#include <linux/netfilter_ipv4/ip_tables.h>
770 +#include <linux/netfilter_ipv4/ipt_IMQ.h>
771 +#include <linux/imq.h>
772 +
773 +static unsigned int imq_target(struct sk_buff *pskb,
774 + const struct net_device *in,
775 + const struct net_device *out,
776 + unsigned int hooknum,
777 + const struct xt_target *target,
778 + const void *targinfo)
779 +{
780 + struct ipt_imq_info *mr = (struct ipt_imq_info *)targinfo;
781 +
782 + pskb->imq_flags = mr->todev | IMQ_F_ENQUEUE;
783 +
784 + return XT_CONTINUE;
785 +}
786 +
787 +static bool imq_checkentry(const char *tablename,
788 + const void *e,
789 + const struct xt_target *target,
790 + void *targinfo,
791 + unsigned int hook_mask)
792 +{
793 + struct ipt_imq_info *mr;
794 +
795 + mr = (struct ipt_imq_info *)targinfo;
796 +
797 + if (mr->todev > IMQ_MAX_DEVS) {
798 + printk(KERN_WARNING
799 + "IMQ: invalid device specified, highest is %u\n",
800 + IMQ_MAX_DEVS);
801 + return 0;
802 + }
803 +
804 + return 1;
805 +}
806 +
807 +static struct xt_target ipt_imq_reg = {
808 + .name = "IMQ",
809 + .family = AF_INET,
810 + .target = imq_target,
811 + .targetsize = sizeof(struct ipt_imq_info),
812 + .checkentry = imq_checkentry,
813 + .me = THIS_MODULE,
814 + .table = "mangle"
815 +};
816 +
817 +static int __init init(void)
818 +{
819 + return xt_register_target(&ipt_imq_reg);
820 +}
821 +
822 +static void __exit fini(void)
823 +{
824 + xt_unregister_target(&ipt_imq_reg);
825 +}
826 +
827 +module_init(init);
828 +module_exit(fini);
829 +
830 +MODULE_AUTHOR("http://www.linuximq.net");
831 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
832 +MODULE_LICENSE("GPL");
833 --- a/net/ipv6/netfilter/Kconfig
834 +++ b/net/ipv6/netfilter/Kconfig
835 @@ -179,6 +179,15 @@
836
837 To compile it as a module, choose M here. If unsure, say N.
838
839 +config IP6_NF_TARGET_IMQ
840 + tristate "IMQ target support"
841 + depends on IP6_NF_MANGLE
842 + help
843 + This option adds a `IMQ' target which is used to specify if and
844 + to which imq device packets should get enqueued/dequeued.
845 +
846 + To compile it as a module, choose M here. If unsure, say N.
847 +
848 config IP6_NF_TARGET_HL
849 tristate 'HL (hoplimit) target support'
850 depends on IP6_NF_MANGLE
851 --- a/net/ipv6/netfilter/Makefile
852 +++ b/net/ipv6/netfilter/Makefile
853 @@ -6,6 +6,7 @@
854 obj-$(CONFIG_IP6_NF_IPTABLES) += ip6_tables.o
855 obj-$(CONFIG_IP6_NF_FILTER) += ip6table_filter.o
856 obj-$(CONFIG_IP6_NF_MANGLE) += ip6table_mangle.o
857 +obj-$(CONFIG_IP6_NF_TARGET_IMQ) += ip6t_IMQ.o
858 obj-$(CONFIG_IP6_NF_QUEUE) += ip6_queue.o
859 obj-$(CONFIG_IP6_NF_RAW) += ip6table_raw.o
860
861 --- /dev/null
862 +++ b/net/ipv6/netfilter/ip6t_IMQ.c
863 @@ -0,0 +1,69 @@
864 +/*
865 + * This target marks packets to be enqueued to an imq device
866 + */
867 +#include <linux/module.h>
868 +#include <linux/skbuff.h>
869 +#include <linux/netfilter_ipv6/ip6_tables.h>
870 +#include <linux/netfilter_ipv6/ip6t_IMQ.h>
871 +#include <linux/imq.h>
872 +
873 +static unsigned int imq_target(struct sk_buff *pskb,
874 + const struct net_device *in,
875 + const struct net_device *out,
876 + unsigned int hooknum,
877 + const struct xt_target *target,
878 + const void *targinfo)
879 +{
880 + struct ip6t_imq_info *mr = (struct ip6t_imq_info *)targinfo;
881 +
882 + pskb->imq_flags = mr->todev | IMQ_F_ENQUEUE;
883 +
884 + return XT_CONTINUE;
885 +}
886 +
887 +static bool imq_checkentry(const char *tablename,
888 + const void *entry,
889 + const struct xt_target *target,
890 + void *targinfo,
891 + unsigned int hook_mask)
892 +{
893 + struct ip6t_imq_info *mr;
894 +
895 + mr = (struct ip6t_imq_info *)targinfo;
896 +
897 + if (mr->todev > IMQ_MAX_DEVS) {
898 + printk(KERN_WARNING
899 + "IMQ: invalid device specified, highest is %u\n",
900 + IMQ_MAX_DEVS);
901 + return 0;
902 + }
903 +
904 + return 1;
905 +}
906 +
907 +static struct xt_target ip6t_imq_reg = {
908 + .name = "IMQ",
909 + .family = AF_INET6,
910 + .target = imq_target,
911 + .targetsize = sizeof(struct ip6t_imq_info),
912 + .table = "mangle",
913 + .checkentry = imq_checkentry,
914 + .me = THIS_MODULE
915 +};
916 +
917 +static int __init init(void)
918 +{
919 + return xt_register_target(&ip6t_imq_reg);
920 +}
921 +
922 +static void __exit fini(void)
923 +{
924 + xt_unregister_target(&ip6t_imq_reg);
925 +}
926 +
927 +module_init(init);
928 +module_exit(fini);
929 +
930 +MODULE_AUTHOR("http://www.linuximq.net");
931 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
932 +MODULE_LICENSE("GPL");
933 --- a/net/sched/sch_generic.c
934 +++ b/net/sched/sch_generic.c
935 @@ -203,6 +203,7 @@
936
937 clear_bit(__LINK_STATE_QDISC_RUNNING, &dev->state);
938 }
939 +EXPORT_SYMBOL(__qdisc_run);
940
941 static void dev_watchdog(unsigned long arg)
942 {