target/linux/generic-2.6/patches-2.6.26/150-netfilter_imq.patch

   1 --- /dev/null
   2 +++ b/drivers/net/imq.c
   3 @@ -0,0 +1,410 @@
   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 including
  28 + *            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 + *             More info at: http://www.linuximq.net/ (Andre Correa)
  53 + */
  54 +
  55 +#include <linux/module.h>
  56 +#include <linux/kernel.h>
  57 +#include <linux/moduleparam.h>
  58 +#include <linux/skbuff.h>
  59 +#include <linux/netdevice.h>
  60 +#include <linux/rtnetlink.h>
  61 +#include <linux/if_arp.h>
  62 +#include <linux/netfilter.h>
  63 +#include <linux/netfilter_ipv4.h>
  64 +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
  65 +       #include <linux/netfilter_ipv6.h>
  66 +#endif
  67 +#include <linux/imq.h>
  68 +#include <net/pkt_sched.h>
  69 +#include <net/netfilter/nf_queue.h>
  70 +
  71 +extern int qdisc_restart1(struct net_device *dev);
  72 +
  73 +static nf_hookfn imq_nf_hook;
  74 +
  75 +static struct nf_hook_ops imq_ingress_ipv4 = {
  76 +       .hook           = imq_nf_hook,
  77 +       .owner          = THIS_MODULE,
  78 +       .pf             = PF_INET,
  79 +       .hooknum        = NF_INET_PRE_ROUTING,
  80 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
  81 +       .priority       = NF_IP_PRI_MANGLE + 1
  82 +#else
  83 +       .priority       = NF_IP_PRI_NAT_DST + 1
  84 +#endif
  85 +};
  86 +
  87 +static struct nf_hook_ops imq_egress_ipv4 = {
  88 +       .hook           = imq_nf_hook,
  89 +       .owner          = THIS_MODULE,
  90 +       .pf             = PF_INET,
  91 +       .hooknum        = NF_INET_POST_ROUTING,
  92 +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
  93 +       .priority       = NF_IP_PRI_LAST
  94 +#else
  95 +       .priority       = NF_IP_PRI_NAT_SRC - 1
  96 +#endif
  97 +};
  98 +
  99 +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 100 +static struct nf_hook_ops imq_ingress_ipv6 = {
 101 +       .hook           = imq_nf_hook,
 102 +       .owner          = THIS_MODULE,
 103 +       .pf             = PF_INET6,
 104 +       .hooknum        = NF_INET_PRE_ROUTING,
 105 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
 106 +       .priority       = NF_IP6_PRI_MANGLE + 1
 107 +#else
 108 +       .priority       = NF_IP6_PRI_NAT_DST + 1
 109 +#endif
 110 +};
 111 +
 112 +static struct nf_hook_ops imq_egress_ipv6 = {
 113 +       .hook           = imq_nf_hook,
 114 +       .owner          = THIS_MODULE,
 115 +       .pf             = PF_INET6,
 116 +       .hooknum        = NF_INET_POST_ROUTING,
 117 +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
 118 +       .priority       = NF_IP6_PRI_LAST
 119 +#else
 120 +       .priority       = NF_IP6_PRI_NAT_SRC - 1
 121 +#endif
 122 +};
 123 +#endif
 124 +
 125 +#if defined(CONFIG_IMQ_NUM_DEVS)
 126 +static unsigned int numdevs = CONFIG_IMQ_NUM_DEVS;
 127 +#else
 128 +static unsigned int numdevs = 16;
 129 +#endif
 130 +
 131 +static struct net_device *imq_devs;
 132 +
 133 +static struct net_device_stats *imq_get_stats(struct net_device *dev)
 134 +{
 135 +       return (struct net_device_stats *)dev->priv;
 136 +}
 137 +
 138 +/* called for packets kfree'd in qdiscs at places other than enqueue */
 139 +static void imq_skb_destructor(struct sk_buff *skb)
 140 +{
 141 +       struct nf_queue_entry *info = skb->nf_queue_entry;
 142 +
 143 +       if (info) {
 144 +               if (info->indev)
 145 +                       dev_put(info->indev);
 146 +               if (info->outdev)
 147 +                       dev_put(info->outdev);
 148 +               kfree(info);
 149 +       }
 150 +}
 151 +
 152 +static int imq_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 153 +{
 154 +       struct net_device_stats *stats = (struct net_device_stats*) dev->priv;
 155 +
 156 +       stats->tx_bytes += skb->len;
 157 +       stats->tx_packets++;
 158 +
 159 +       skb->imq_flags = 0;
 160 +       skb->destructor = NULL;
 161 +
 162 +       dev->trans_start = jiffies;
 163 +       nf_reinject(skb->nf_queue_entry, NF_ACCEPT);
 164 +       return 0;
 165 +}
 166 +
 167 +static int imq_nf_queue(struct nf_queue_entry *info, unsigned queue_num)
 168 +{
 169 +       struct net_device *dev;
 170 +       struct net_device_stats *stats;
 171 +       struct sk_buff *skb2 = NULL;
 172 +       struct Qdisc *q;
 173 +       unsigned int index = info->skb->imq_flags&IMQ_F_IFMASK;
 174 +       int ret = -1;
 175 +
 176 +       if (index > numdevs)
 177 +               return -1;
 178 +
 179 +       dev = imq_devs + index;
 180 +       if (!(dev->flags & IFF_UP)) {
 181 +               info->skb->imq_flags = 0;
 182 +               nf_reinject(info, NF_ACCEPT);
 183 +               return 0;
 184 +       }
 185 +       dev->last_rx = jiffies;
 186 +
 187 +       if (info->skb->destructor) {
 188 +               skb2 = info->skb;
 189 +               info->skb = skb_clone(info->skb, GFP_ATOMIC);
 190 +               if (!info->skb)
 191 +                       return -1;
 192 +       }
 193 +       info->skb->nf_queue_entry = info;
 194 +
 195 +       stats = (struct net_device_stats *)dev->priv;
 196 +       stats->rx_bytes+= info->skb->len;
 197 +       stats->rx_packets++;
 198 +
 199 +       spin_lock_bh(&dev->queue_lock);
 200 +       q = dev->qdisc;
 201 +       if (q->enqueue) {
 202 +               q->enqueue(skb_get(info->skb), q);
 203 +               if (skb_shared(info->skb)) {
 204 +                       info->skb->destructor = imq_skb_destructor;
 205 +                       kfree_skb(info->skb);
 206 +                       ret = 0;
 207 +               }
 208 +       }
 209 +       if (spin_is_locked(&dev->_xmit_lock))
 210 +               netif_schedule(dev);
 211 +       else
 212 +               while (!netif_queue_stopped(dev) && qdisc_restart1(dev) < 0)
 213 +                       /* NOTHING */;
 214 +
 215 +       spin_unlock_bh(&dev->queue_lock);
 216 +
 217 +       if (skb2)
 218 +               kfree_skb(ret ? info->skb : skb2);
 219 +
 220 +       return ret;
 221 +}
 222 +
 223 +static struct nf_queue_handler nfqh = {
 224 +       .name  = "imq",
 225 +       .outfn = imq_nf_queue,
 226 +};
 227 +
 228 +static unsigned int imq_nf_hook(unsigned int hook, struct sk_buff *pskb,
 229 +                               const struct net_device *indev,
 230 +                               const struct net_device *outdev,
 231 +                               int (*okfn)(struct sk_buff *))
 232 +{
 233 +       if (pskb->imq_flags & IMQ_F_ENQUEUE)
 234 +               return NF_QUEUE;
 235 +
 236 +       return NF_ACCEPT;
 237 +}
 238 +
 239 +
 240 +static int __init imq_init_hooks(void)
 241 +{
 242 +       int err;
 243 +
 244 +       err = nf_register_queue_handler(PF_INET, &nfqh);
 245 +       if (err > 0)
 246 +               goto err1;
 247 +       if ((err = nf_register_hook(&imq_ingress_ipv4)))
 248 +               goto err2;
 249 +       if ((err = nf_register_hook(&imq_egress_ipv4)))
 250 +               goto err3;
 251 +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 252 +       if ((err = nf_register_queue_handler(PF_INET6, &nfqh)))
 253 +               goto err4;
 254 +       if ((err = nf_register_hook(&imq_ingress_ipv6)))
 255 +               goto err5;
 256 +       if ((err = nf_register_hook(&imq_egress_ipv6)))
 257 +               goto err6;
 258 +#endif
 259 +
 260 +       return 0;
 261 +
 262 +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 263 +err6:
 264 +       nf_unregister_hook(&imq_ingress_ipv6);
 265 +err5:
 266 +       nf_unregister_queue_handler(PF_INET6, &nfqh);
 267 +err4:
 268 +       nf_unregister_hook(&imq_egress_ipv4);
 269 +#endif
 270 +err3:
 271 +       nf_unregister_hook(&imq_ingress_ipv4);
 272 +err2:
 273 +       nf_unregister_queue_handler(PF_INET, &nfqh);
 274 +err1:
 275 +       return err;
 276 +}
 277 +
 278 +static void __exit imq_unhook(void)
 279 +{
 280 +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 281 +       nf_unregister_hook(&imq_ingress_ipv6);
 282 +       nf_unregister_hook(&imq_egress_ipv6);
 283 +       nf_unregister_queue_handler(PF_INET6, &nfqh);
 284 +#endif
 285 +       nf_unregister_hook(&imq_ingress_ipv4);
 286 +       nf_unregister_hook(&imq_egress_ipv4);
 287 +       nf_unregister_queue_handler(PF_INET, &nfqh);
 288 +}
 289 +
 290 +static int __init imq_dev_init(struct net_device *dev)
 291 +{
 292 +       dev->hard_start_xmit    = imq_dev_xmit;
 293 +       dev->type               = ARPHRD_VOID;
 294 +       dev->mtu                = 16000;
 295 +       dev->tx_queue_len       = 11000;
 296 +       dev->flags              = IFF_NOARP;
 297 +       dev->priv = kzalloc(sizeof(struct net_device_stats), GFP_KERNEL);
 298 +       if (dev->priv == NULL)
 299 +               return -ENOMEM;
 300 +       dev->get_stats          = imq_get_stats;
 301 +
 302 +       return 0;
 303 +}
 304 +
 305 +static void imq_dev_uninit(struct net_device *dev)
 306 +{
 307 +       kfree(dev->priv);
 308 +}
 309 +
 310 +static int __init imq_init_devs(struct net *net)
 311 +{
 312 +       struct net_device *dev;
 313 +       int i,j;
 314 +       j = numdevs;
 315 +
 316 +       if (!numdevs || numdevs > IMQ_MAX_DEVS) {
 317 +               printk(KERN_ERR "IMQ: numdevs has to be betweed 1 and %u\n",
 318 +                      IMQ_MAX_DEVS);
 319 +               return -EINVAL;
 320 +       }
 321 +
 322 +       imq_devs = kzalloc(sizeof(struct net_device) * numdevs, GFP_KERNEL);
 323 +       if (!imq_devs)
 324 +               return -ENOMEM;
 325 +
 326 +       /* we start counting at zero */
 327 +       numdevs--;
 328 +
 329 +       for (i = 0, dev = imq_devs; i <= numdevs; i++, dev++) {
 330 +               strcpy(dev->name, "imq%d");
 331 +               dev->init   = imq_dev_init;
 332 +               dev->uninit = imq_dev_uninit;
 333 +               dev->nd_net = net;
 334 +
 335 +               if (register_netdev(dev) < 0)
 336 +                       goto err_register;
 337 +       }
 338 +       printk(KERN_INFO "IMQ starting with %u devices...\n", j);
 339 +       return 0;
 340 +
 341 +err_register:
 342 +       for (; i; i--)
 343 +               unregister_netdev(--dev);
 344 +       kfree(imq_devs);
 345 +       return -EIO;
 346 +}
 347 +
 348 +static void imq_cleanup_devs(void)
 349 +{
 350 +       int i;
 351 +       struct net_device *dev = imq_devs;
 352 +
 353 +       for (i = 0; i <= numdevs; i++)
 354 +               unregister_netdev(dev++);
 355 +
 356 +       kfree(imq_devs);
 357 +}
 358 +
 359 +static __net_init int imq_init_module(struct net *net)
 360 +{
 361 +       int err;
 362 +
 363 +       if ((err = imq_init_devs(net))) {
 364 +               printk(KERN_ERR "IMQ: Error trying imq_init_devs(net)\n");
 365 +               return err;
 366 +       }
 367 +       if ((err = imq_init_hooks())) {
 368 +               printk(KERN_ERR "IMQ: Error trying imq_init_hooks()\n");
 369 +               imq_cleanup_devs();
 370 +               return err;
 371 +       }
 372 +
 373 +       printk(KERN_INFO "IMQ driver loaded successfully.\n");
 374 +
 375 +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
 376 +       printk(KERN_INFO "\tHooking IMQ before NAT on PREROUTING.\n");
 377 +#else
 378 +       printk(KERN_INFO "\tHooking IMQ after NAT on PREROUTING.\n");
 379 +#endif
 380 +#if defined(CONFIG_IMQ_BEHAVIOR_AB) || defined(CONFIG_IMQ_BEHAVIOR_BB)
 381 +       printk(KERN_INFO "\tHooking IMQ before NAT on POSTROUTING.\n");
 382 +#else
 383 +       printk(KERN_INFO "\tHooking IMQ after NAT on POSTROUTING.\n");
 384 +#endif
 385 +
 386 +       return 0;
 387 +}
 388 +
 389 +static __net_exit void imq_exit_module(struct net *net)
 390 +{
 391 +       imq_unhook();
 392 +       imq_cleanup_devs();
 393 +       printk(KERN_INFO "IMQ driver unloaded successfully.\n");
 394 +}
 395 +
 396 +static struct pernet_operations __net_initdata imq_net_ops = {
 397 +    .init = imq_init_module,
 398 +    .exit = imq_exit_module,
 399 +};
 400 +
 401 +static int __init imq_init(void)
 402 +{
 403 +    return register_pernet_device(&imq_net_ops);
 404 +}
 405 +
 406 +module_init(imq_init);
 407 +//module_exit(imq_cleanup_module);
 408 +
 409 +module_param(numdevs, int, 0);
 410 +MODULE_PARM_DESC(numdevs, "number of IMQ devices (how many imq* devices will be created)");
 411 +MODULE_AUTHOR("http://www.linuximq.net");
 412 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
 413 +MODULE_LICENSE("GPL");
 414 --- a/drivers/net/Kconfig
 415 +++ b/drivers/net/Kconfig
 416 @@ -117,6 +117,129 @@
 417           To compile this driver as a module, choose M here: the module
 418           will be called eql.  If unsure, say N.
 419
 420 +config IMQ
 421 +       tristate "IMQ (intermediate queueing device) support"
 422 +       depends on NETDEVICES && NETFILTER
 423 +       ---help---
 424 +         The IMQ device(s) is used as placeholder for QoS queueing
 425 +         disciplines. Every packet entering/leaving the IP stack can be
 426 +         directed through the IMQ device where it's enqueued/dequeued to the
 427 +         attached qdisc. This allows you to treat network devices as classes
 428 +         and distribute bandwidth among them. Iptables is used to specify
 429 +         through which IMQ device, if any, packets travel.
 430 +
 431 +         More information at: http://www.linuximq.net/
 432 +
 433 +         To compile this driver as a module, choose M here: the module
 434 +         will be called imq.  If unsure, say N.
 435 +
 436 +choice
 437 +       prompt "IMQ behavior (PRE/POSTROUTING)"
 438 +       depends on IMQ
 439 +       default IMQ_BEHAVIOR_BB
 440 +       help
 441 +
 442 +               This settings defines how IMQ behaves in respect to its
 443 +               hooking in PREROUTING and POSTROUTING.
 444 +
 445 +               IMQ can work in any of the following ways:
 446 +
 447 +                   PREROUTING   |      POSTROUTING
 448 +               -----------------|-------------------
 449 +               #1  After NAT    |      After NAT
 450 +               #2  After NAT    |      Before NAT
 451 +               #3  Before NAT   |      After NAT
 452 +               #4  Before NAT   |      Before NAT
 453 +
 454 +               The default behavior is to hook before NAT on PREROUTING
 455 +               and after NAT on POSTROUTING (#3).
 456 +
 457 +               This settings are specially usefull when trying to use IMQ
 458 +               to shape NATed clients.
 459 +
 460 +               More information can be found at: www.linuximq.net
 461 +
 462 +               If not sure leave the default settings alone.
 463 +
 464 +config IMQ_BEHAVIOR_AA
 465 +       bool "IMQ AA"
 466 +       help
 467 +               This settings defines how IMQ behaves in respect to its
 468 +               hooking in PREROUTING and POSTROUTING.
 469 +
 470 +               Choosing this option will make IMQ hook like this:
 471 +
 472 +               PREROUTING:   After NAT
 473 +               POSTROUTING:  After NAT
 474 +
 475 +               More information can be found at: www.linuximq.net
 476 +
 477 +               If not sure leave the default settings alone.
 478 +
 479 +config IMQ_BEHAVIOR_AB
 480 +       bool "IMQ AB"
 481 +       help
 482 +               This settings defines how IMQ behaves in respect to its
 483 +               hooking in PREROUTING and POSTROUTING.
 484 +
 485 +               Choosing this option will make IMQ hook like this:
 486 +
 487 +               PREROUTING:   After NAT
 488 +               POSTROUTING:  Before NAT
 489 +
 490 +               More information can be found at: www.linuximq.net
 491 +
 492 +               If not sure leave the default settings alone.
 493 +
 494 +config IMQ_BEHAVIOR_BA
 495 +       bool "IMQ BA"
 496 +       help
 497 +               This settings defines how IMQ behaves in respect to its
 498 +               hooking in PREROUTING and POSTROUTING.
 499 +
 500 +               Choosing this option will make IMQ hook like this:
 501 +
 502 +               PREROUTING:   Before NAT
 503 +               POSTROUTING:  After NAT
 504 +
 505 +               More information can be found at: www.linuximq.net
 506 +
 507 +               If not sure leave the default settings alone.
 508 +
 509 +config IMQ_BEHAVIOR_BB
 510 +       bool "IMQ BB"
 511 +       help
 512 +               This settings defines how IMQ behaves in respect to its
 513 +               hooking in PREROUTING and POSTROUTING.
 514 +
 515 +               Choosing this option will make IMQ hook like this:
 516 +
 517 +               PREROUTING:   Before NAT
 518 +               POSTROUTING:  Before NAT
 519 +
 520 +               More information can be found at: www.linuximq.net
 521 +
 522 +               If not sure leave the default settings alone.
 523 +
 524 +endchoice
 525 +
 526 +config IMQ_NUM_DEVS
 527 +
 528 +       int "Number of IMQ devices"
 529 +       range 2 16
 530 +       depends on IMQ
 531 +       default "16"
 532 +       help
 533 +
 534 +               This settings defines how many IMQ devices will be
 535 +               created.
 536 +
 537 +               The default value is 16.
 538 +
 539 +               More information can be found at: www.linuximq.net
 540 +
 541 +               If not sure leave the default settings alone.
 542 +
 543  config TUN
 544         tristate "Universal TUN/TAP device driver support"
 545         select CRC32
 546 --- a/drivers/net/Makefile
 547 +++ b/drivers/net/Makefile
 548 @@ -143,6 +143,7 @@
 549  obj-$(CONFIG_XEN_NETDEV_FRONTEND) += xen-netfront.o
 550
 551  obj-$(CONFIG_DUMMY) += dummy.o
 552 +obj-$(CONFIG_IMQ) += imq.o
 553  obj-$(CONFIG_IFB) += ifb.o
 554  obj-$(CONFIG_MACVLAN) += macvlan.o
 555  obj-$(CONFIG_DE600) += de600.o
 556 --- /dev/null
 557 +++ b/include/linux/imq.h
 558 @@ -0,0 +1,9 @@
 559 +#ifndef _IMQ_H
 560 +#define _IMQ_H
 561 +
 562 +#define IMQ_MAX_DEVS   16
 563 +
 564 +#define IMQ_F_IFMASK   0x7f
 565 +#define IMQ_F_ENQUEUE  0x80
 566 +
 567 +#endif /* _IMQ_H */
 568 --- /dev/null
 569 +++ b/include/linux/netfilter_ipv4/ipt_IMQ.h
 570 @@ -0,0 +1,8 @@
 571 +#ifndef _IPT_IMQ_H
 572 +#define _IPT_IMQ_H
 573 +
 574 +struct ipt_imq_info {
 575 +       unsigned int todev;     /* target imq device */
 576 +};
 577 +
 578 +#endif /* _IPT_IMQ_H */
 579 --- /dev/null
 580 +++ b/include/linux/netfilter_ipv6/ip6t_IMQ.h
 581 @@ -0,0 +1,8 @@
 582 +#ifndef _IP6T_IMQ_H
 583 +#define _IP6T_IMQ_H
 584 +
 585 +struct ip6t_imq_info {
 586 +       unsigned int todev;     /* target imq device */
 587 +};
 588 +
 589 +#endif /* _IP6T_IMQ_H */
 590 --- a/include/linux/skbuff.h
 591 +++ b/include/linux/skbuff.h
 592 @@ -296,6 +296,10 @@
 593         struct nf_conntrack     *nfct;
 594         struct sk_buff          *nfct_reasm;
 595  #endif
 596 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
 597 +       unsigned char                   imq_flags;
 598 +       struct nf_queue_entry   *nf_queue_entry;
 599 +#endif
 600  #ifdef CONFIG_BRIDGE_NETFILTER
 601         struct nf_bridge_info   *nf_bridge;
 602  #endif
 603 @@ -1736,6 +1740,10 @@
 604         dst->nfct_reasm = src->nfct_reasm;
 605         nf_conntrack_get_reasm(src->nfct_reasm);
 606  #endif
 607 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
 608 +       dst->imq_flags = src->imq_flags;
 609 +       dst->nf_queue_entry = src->nf_queue_entry;
 610 +#endif
 611  #ifdef CONFIG_BRIDGE_NETFILTER
 612         dst->nf_bridge  = src->nf_bridge;
 613         nf_bridge_get(src->nf_bridge);
 614 --- a/net/core/dev.c
 615 +++ b/net/core/dev.c
 616 @@ -95,6 +95,9 @@
 617  #include <net/net_namespace.h>
 618  #include <net/sock.h>
 619  #include <linux/rtnetlink.h>
 620 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
 621 +#include <linux/imq.h>
 622 +#endif
 623  #include <linux/proc_fs.h>
 624  #include <linux/seq_file.h>
 625  #include <linux/stat.h>
 626 @@ -1537,7 +1540,11 @@
 627  int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 628  {
 629         if (likely(!skb->next)) {
 630 -               if (!list_empty(&ptype_all))
 631 +               if (!list_empty(&ptype_all)
 632 +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
 633 +                   && !(skb->imq_flags & IMQ_F_ENQUEUE)
 634 +#endif
 635 +                   )
 636                         dev_queue_xmit_nit(skb, dev);
 637
 638                 if (netif_needs_gso(dev, skb)) {
 639 --- /dev/null
 640 +++ b/net/ipv4/netfilter/ipt_IMQ.c
 641 @@ -0,0 +1,69 @@
 642 +/*
 643 + * This target marks packets to be enqueued to an imq device
 644 + */
 645 +#include <linux/module.h>
 646 +#include <linux/skbuff.h>
 647 +#include <linux/netfilter_ipv4/ip_tables.h>
 648 +#include <linux/netfilter_ipv4/ipt_IMQ.h>
 649 +#include <linux/imq.h>
 650 +
 651 +static unsigned int imq_target(struct sk_buff *pskb,
 652 +                              const struct net_device *in,
 653 +                              const struct net_device *out,
 654 +                              unsigned int hooknum,
 655 +                              const struct xt_target *target,
 656 +                              const void *targinfo)
 657 +{
 658 +       struct ipt_imq_info *mr = (struct ipt_imq_info*)targinfo;
 659 +
 660 +       pskb->imq_flags = mr->todev | IMQ_F_ENQUEUE;
 661 +
 662 +       return XT_CONTINUE;
 663 +}
 664 +
 665 +static bool imq_checkentry(const char *tablename,
 666 +                         const void *e,
 667 +                         const struct xt_target *target,
 668 +                         void *targinfo,
 669 +                         unsigned int hook_mask)
 670 +{
 671 +       struct ipt_imq_info *mr;
 672 +
 673 +       mr = (struct ipt_imq_info*)targinfo;
 674 +
 675 +       if (mr->todev > IMQ_MAX_DEVS) {
 676 +               printk(KERN_WARNING
 677 +                      "IMQ: invalid device specified, highest is %u\n",
 678 +                      IMQ_MAX_DEVS);
 679 +               return 0;
 680 +       }
 681 +
 682 +       return 1;
 683 +}
 684 +
 685 +static struct xt_target ipt_imq_reg = {
 686 +       .name           = "IMQ",
 687 +       .family         = AF_INET,
 688 +       .target         = imq_target,
 689 +       .targetsize     = sizeof(struct ipt_imq_info),
 690 +       .checkentry     = imq_checkentry,
 691 +       .me             = THIS_MODULE,
 692 +       .table          = "mangle"
 693 +};
 694 +
 695 +static int __init init(void)
 696 +{
 697 +       return xt_register_target(&ipt_imq_reg);
 698 +}
 699 +
 700 +static void __exit fini(void)
 701 +{
 702 +       xt_unregister_target(&ipt_imq_reg);
 703 +}
 704 +
 705 +module_init(init);
 706 +module_exit(fini);
 707 +
 708 +MODULE_AUTHOR("http://www.linuximq.net");
 709 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
 710 +MODULE_LICENSE("GPL");
 711 --- a/net/ipv4/netfilter/Kconfig
 712 +++ b/net/ipv4/netfilter/Kconfig
 713 @@ -145,6 +145,17 @@
 714
 715           To compile it as a module, choose M here.  If unsure, say N.
 716
 717 +config IP_NF_TARGET_IMQ
 718 +       tristate "IMQ target support"
 719 +       depends on IP_NF_MANGLE && IMQ
 720 +       help
 721 +         This option adds a `IMQ' target which is used to specify if and
 722 +         to which IMQ device packets should get enqueued/dequeued.
 723 +
 724 +        For more information visit: http://www.linuximq.net/
 725 +
 726 +         To compile it as a module, choose M here.  If unsure, say N.
 727 +
 728  config IP_NF_TARGET_REJECT
 729         tristate "REJECT target support"
 730         depends on IP_NF_FILTER
 731 --- a/net/ipv4/netfilter/Makefile
 732 +++ b/net/ipv4/netfilter/Makefile
 733 @@ -55,6 +55,7 @@
 734  obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
 735  obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o
 736  obj-$(CONFIG_IP_NF_TARGET_LOG) += ipt_LOG.o
 737 +obj-$(CONFIG_IP_NF_TARGET_IMQ) += ipt_IMQ.o
 738  obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o
 739  obj-$(CONFIG_IP_NF_TARGET_NETMAP) += ipt_NETMAP.o
 740  obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
 741 --- /dev/null
 742 +++ b/net/ipv6/netfilter/ip6t_IMQ.c
 743 @@ -0,0 +1,69 @@
 744 +/*
 745 + * This target marks packets to be enqueued to an imq device
 746 + */
 747 +#include <linux/module.h>
 748 +#include <linux/skbuff.h>
 749 +#include <linux/netfilter_ipv6/ip6_tables.h>
 750 +#include <linux/netfilter_ipv6/ip6t_IMQ.h>
 751 +#include <linux/imq.h>
 752 +
 753 +static unsigned int imq_target(struct sk_buff *pskb,
 754 +                              const struct net_device *in,
 755 +                              const struct net_device *out,
 756 +                              unsigned int hooknum,
 757 +                              const struct xt_target *target,
 758 +                              const void *targinfo)
 759 +{
 760 +       struct ip6t_imq_info *mr = (struct ip6t_imq_info*)targinfo;
 761 +
 762 +       pskb->imq_flags = mr->todev | IMQ_F_ENQUEUE;
 763 +
 764 +       return XT_CONTINUE;
 765 +}
 766 +
 767 +static bool imq_checkentry(const char *tablename,
 768 +                         const void *entry,
 769 +                         const struct xt_target *target,
 770 +                         void *targinfo,
 771 +                         unsigned int hook_mask)
 772 +{
 773 +       struct ip6t_imq_info *mr;
 774 +
 775 +       mr = (struct ip6t_imq_info*)targinfo;
 776 +
 777 +       if (mr->todev > IMQ_MAX_DEVS) {
 778 +               printk(KERN_WARNING
 779 +                      "IMQ: invalid device specified, highest is %u\n",
 780 +                      IMQ_MAX_DEVS);
 781 +               return 0;
 782 +       }
 783 +
 784 +       return 1;
 785 +}
 786 +
 787 +static struct xt_target ip6t_imq_reg = {
 788 +       .name           = "IMQ",
 789 +       .family         = AF_INET6,
 790 +       .target         = imq_target,
 791 +       .targetsize     = sizeof(struct ip6t_imq_info),
 792 +       .table          = "mangle",
 793 +       .checkentry     = imq_checkentry,
 794 +       .me             = THIS_MODULE
 795 +};
 796 +
 797 +static int __init init(void)
 798 +{
 799 +       return xt_register_target(&ip6t_imq_reg);
 800 +}
 801 +
 802 +static void __exit fini(void)
 803 +{
 804 +       xt_unregister_target(&ip6t_imq_reg);
 805 +}
 806 +
 807 +module_init(init);
 808 +module_exit(fini);
 809 +
 810 +MODULE_AUTHOR("http://www.linuximq.net");
 811 +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
 812 +MODULE_LICENSE("GPL");
 813 --- a/net/ipv6/netfilter/Kconfig
 814 +++ b/net/ipv6/netfilter/Kconfig
 815 @@ -179,6 +179,15 @@
 816
 817           To compile it as a module, choose M here.  If unsure, say N.
 818
 819 +config IP6_NF_TARGET_IMQ
 820 +       tristate "IMQ target support"
 821 +       depends on IP6_NF_MANGLE && IMQ
 822 +       help
 823 +          This option adds a `IMQ' target which is used to specify if and
 824 +          to which imq device packets should get enqueued/dequeued.
 825 +
 826 +          To compile it as a module, choose M here.  If unsure, say N.
 827 +
 828  config IP6_NF_TARGET_HL
 829         tristate  'HL (hoplimit) target support'
 830         depends on IP6_NF_MANGLE
 831 --- a/net/ipv6/netfilter/Makefile
 832 +++ b/net/ipv6/netfilter/Makefile
 833 @@ -6,6 +6,7 @@
 834  obj-$(CONFIG_IP6_NF_IPTABLES) += ip6_tables.o
 835  obj-$(CONFIG_IP6_NF_FILTER) += ip6table_filter.o
 836  obj-$(CONFIG_IP6_NF_MANGLE) += ip6table_mangle.o
 837 +obj-$(CONFIG_IP6_NF_TARGET_IMQ) += ip6t_IMQ.o
 838  obj-$(CONFIG_IP6_NF_QUEUE) += ip6_queue.o
 839  obj-$(CONFIG_IP6_NF_RAW) += ip6table_raw.o
 840
 841 --- a/net/sched/sch_generic.c
 842 +++ b/net/sched/sch_generic.c
 843 @@ -182,6 +182,12 @@
 844         return ret;
 845  }
 846
 847 +int qdisc_restart1(struct net_device *dev)
 848 +{
 849 +       return qdisc_restart(dev);
 850 +}
 851 +EXPORT_SYMBOL(qdisc_restart1);
 852 +
 853  void __qdisc_run(struct net_device *dev)
 854  {
 855         unsigned long start_time = jiffies;