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1f6abd53 AF |
1 | diff -uNr linux-3.2/drivers/net/imq.c linux-3.2-imq/drivers/net/imq.c |
2 | --- linux-3.2/drivers/net/imq.c 1970-01-01 02:00:00.000000000 +0200 | |
3 | +++ linux-3.2-imq/drivers/net/imq.c 2011-11-04 12:16:10.454992642 +0200 | |
4 | @@ -0,0 +1,850 @@ | |
5 | +/* | |
6 | + * Pseudo-driver for the intermediate queue device. | |
7 | + * | |
8 | + * This program is free software; you can redistribute it and/or | |
9 | + * modify it under the terms of the GNU General Public License | |
10 | + * as published by the Free Software Foundation; either version | |
11 | + * 2 of the License, or (at your option) any later version. | |
12 | + * | |
13 | + * Authors: Patrick McHardy, <kaber@trash.net> | |
14 | + * | |
15 | + * The first version was written by Martin Devera, <devik@cdi.cz> | |
16 | + * | |
17 | + * Credits: Jan Rafaj <imq2t@cedric.vabo.cz> | |
18 | + * - Update patch to 2.4.21 | |
19 | + * Sebastian Strollo <sstrollo@nortelnetworks.com> | |
20 | + * - Fix "Dead-loop on netdevice imq"-issue | |
21 | + * Marcel Sebek <sebek64@post.cz> | |
22 | + * - Update to 2.6.2-rc1 | |
23 | + * | |
24 | + * After some time of inactivity there is a group taking care | |
25 | + * of IMQ again: http://www.linuximq.net | |
26 | + * | |
27 | + * | |
28 | + * 2004/06/30 - New version of IMQ patch to kernels <=2.6.7 | |
29 | + * including the following changes: | |
30 | + * | |
31 | + * - Correction of ipv6 support "+"s issue (Hasso Tepper) | |
32 | + * - Correction of imq_init_devs() issue that resulted in | |
33 | + * kernel OOPS unloading IMQ as module (Norbert Buchmuller) | |
34 | + * - Addition of functionality to choose number of IMQ devices | |
35 | + * during kernel config (Andre Correa) | |
36 | + * - Addition of functionality to choose how IMQ hooks on | |
37 | + * PRE and POSTROUTING (after or before NAT) (Andre Correa) | |
38 | + * - Cosmetic corrections (Norbert Buchmuller) (Andre Correa) | |
39 | + * | |
40 | + * | |
41 | + * 2005/12/16 - IMQ versions between 2.6.7 and 2.6.13 were | |
42 | + * released with almost no problems. 2.6.14-x was released | |
43 | + * with some important changes: nfcache was removed; After | |
44 | + * some weeks of trouble we figured out that some IMQ fields | |
45 | + * in skb were missing in skbuff.c - skb_clone and copy_skb_header. | |
46 | + * These functions are correctly patched by this new patch version. | |
47 | + * | |
48 | + * Thanks for all who helped to figure out all the problems with | |
49 | + * 2.6.14.x: Patrick McHardy, Rune Kock, VeNoMouS, Max CtRiX, | |
50 | + * Kevin Shanahan, Richard Lucassen, Valery Dachev (hopefully | |
51 | + * I didn't forget anybody). I apologize again for my lack of time. | |
52 | + * | |
53 | + * | |
54 | + * 2008/06/17 - 2.6.25 - Changed imq.c to use qdisc_run() instead | |
55 | + * of qdisc_restart() and moved qdisc_run() to tasklet to avoid | |
56 | + * recursive locking. New initialization routines to fix 'rmmod' not | |
57 | + * working anymore. Used code from ifb.c. (Jussi Kivilinna) | |
58 | + * | |
59 | + * 2008/08/06 - 2.6.26 - (JK) | |
60 | + * - Replaced tasklet with 'netif_schedule()'. | |
61 | + * - Cleaned up and added comments for imq_nf_queue(). | |
62 | + * | |
63 | + * 2009/04/12 | |
64 | + * - Add skb_save_cb/skb_restore_cb helper functions for backuping | |
65 | + * control buffer. This is needed because qdisc-layer on kernels | |
66 | + * 2.6.27 and newer overwrite control buffer. (Jussi Kivilinna) | |
67 | + * - Add better locking for IMQ device. Hopefully this will solve | |
68 | + * SMP issues. (Jussi Kivilinna) | |
69 | + * - Port to 2.6.27 | |
70 | + * - Port to 2.6.28 | |
71 | + * - Port to 2.6.29 + fix rmmod not working | |
72 | + * | |
73 | + * 2009/04/20 - (Jussi Kivilinna) | |
74 | + * - Use netdevice feature flags to avoid extra packet handling | |
75 | + * by core networking layer and possibly increase performance. | |
76 | + * | |
77 | + * 2009/09/26 - (Jussi Kivilinna) | |
78 | + * - Add imq_nf_reinject_lockless to fix deadlock with | |
79 | + * imq_nf_queue/imq_nf_reinject. | |
80 | + * | |
81 | + * 2009/12/08 - (Jussi Kivilinna) | |
82 | + * - Port to 2.6.32 | |
83 | + * - Add check for skb->nf_queue_entry==NULL in imq_dev_xmit() | |
84 | + * - Also add better error checking for skb->nf_queue_entry usage | |
85 | + * | |
86 | + * 2010/02/25 - (Jussi Kivilinna) | |
87 | + * - Port to 2.6.33 | |
88 | + * | |
89 | + * 2010/08/15 - (Jussi Kivilinna) | |
90 | + * - Port to 2.6.35 | |
91 | + * - Simplify hook registration by using nf_register_hooks. | |
92 | + * - nf_reinject doesn't need spinlock around it, therefore remove | |
93 | + * imq_nf_reinject function. Other nf_reinject users protect | |
94 | + * their own data with spinlock. With IMQ however all data is | |
95 | + * needed is stored per skbuff, so no locking is needed. | |
96 | + * - Changed IMQ to use 'separate' NF_IMQ_QUEUE instead of | |
97 | + * NF_QUEUE, this allows working coexistance of IMQ and other | |
98 | + * NF_QUEUE users. | |
99 | + * - Make IMQ multi-queue. Number of IMQ device queues can be | |
100 | + * increased with 'numqueues' module parameters. Default number | |
101 | + * of queues is 1, in other words by default IMQ works as | |
102 | + * single-queue device. Multi-queue selection is based on | |
103 | + * IFB multi-queue patch by Changli Gao <xiaosuo@gmail.com>. | |
104 | + * | |
105 | + * 2011/03/18 - (Jussi Kivilinna) | |
106 | + * - Port to 2.6.38 | |
107 | + * | |
108 | + * 2011/07/12 - (syoder89@gmail.com) | |
109 | + * - Crash fix that happens when the receiving interface has more | |
110 | + * than one queue (add missing skb_set_queue_mapping in | |
111 | + * imq_select_queue). | |
112 | + * | |
113 | + * 2011/07/26 - (Jussi Kivilinna) | |
114 | + * - Add queue mapping checks for packets exiting IMQ. | |
115 | + * - Port to 3.0 | |
116 | + * | |
117 | + * 2011/08/16 - (Jussi Kivilinna) | |
118 | + * - Clear IFF_TX_SKB_SHARING flag that was added for linux 3.0.2 | |
119 | + * | |
120 | + * 2011/11/03 - Germano Michel <germanomichel@gmail.com> | |
121 | + * - Fix IMQ for net namespaces | |
122 | + * | |
123 | + * 2011/11/04 - Jussi Kivilinna <jussi.kivilinna@mbnet.fi> | |
124 | + * - Port to 3.1 | |
125 | + * - Clean-up, move 'get imq device pointer by imqX name' to | |
126 | + * separate function from imq_nf_queue(). | |
127 | + * | |
128 | + * Also, many thanks to pablo Sebastian Greco for making the initial | |
129 | + * patch and to those who helped the testing. | |
130 | + * | |
131 | + * More info at: http://www.linuximq.net/ (Andre Correa) | |
132 | + */ | |
133 | + | |
134 | +#include <linux/module.h> | |
135 | +#include <linux/kernel.h> | |
136 | +#include <linux/moduleparam.h> | |
137 | +#include <linux/list.h> | |
138 | +#include <linux/skbuff.h> | |
139 | +#include <linux/netdevice.h> | |
140 | +#include <linux/etherdevice.h> | |
141 | +#include <linux/rtnetlink.h> | |
142 | +#include <linux/if_arp.h> | |
143 | +#include <linux/netfilter.h> | |
144 | +#include <linux/netfilter_ipv4.h> | |
145 | +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
146 | + #include <linux/netfilter_ipv6.h> | |
147 | +#endif | |
148 | +#include <linux/imq.h> | |
149 | +#include <net/pkt_sched.h> | |
150 | +#include <net/netfilter/nf_queue.h> | |
151 | +#include <net/sock.h> | |
152 | +#include <linux/ip.h> | |
153 | +#include <linux/ipv6.h> | |
154 | +#include <linux/if_vlan.h> | |
155 | +#include <linux/if_pppox.h> | |
156 | +#include <net/ip.h> | |
157 | +#include <net/ipv6.h> | |
158 | + | |
159 | +static int imq_nf_queue(struct nf_queue_entry *entry, unsigned queue_num); | |
160 | + | |
161 | +static nf_hookfn imq_nf_hook; | |
162 | + | |
163 | +static struct nf_hook_ops imq_ops[] = { | |
164 | + { | |
165 | + /* imq_ingress_ipv4 */ | |
166 | + .hook = imq_nf_hook, | |
167 | + .owner = THIS_MODULE, | |
168 | + .pf = PF_INET, | |
169 | + .hooknum = NF_INET_PRE_ROUTING, | |
170 | +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB) | |
171 | + .priority = NF_IP_PRI_MANGLE + 1, | |
172 | +#else | |
173 | + .priority = NF_IP_PRI_NAT_DST + 1, | |
174 | +#endif | |
175 | + }, | |
176 | + { | |
177 | + /* imq_egress_ipv4 */ | |
178 | + .hook = imq_nf_hook, | |
179 | + .owner = THIS_MODULE, | |
180 | + .pf = PF_INET, | |
181 | + .hooknum = NF_INET_POST_ROUTING, | |
182 | +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA) | |
183 | + .priority = NF_IP_PRI_LAST, | |
184 | +#else | |
185 | + .priority = NF_IP_PRI_NAT_SRC - 1, | |
186 | +#endif | |
187 | + }, | |
188 | +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
189 | + { | |
190 | + /* imq_ingress_ipv6 */ | |
191 | + .hook = imq_nf_hook, | |
192 | + .owner = THIS_MODULE, | |
193 | + .pf = PF_INET6, | |
194 | + .hooknum = NF_INET_PRE_ROUTING, | |
195 | +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB) | |
196 | + .priority = NF_IP6_PRI_MANGLE + 1, | |
197 | +#else | |
198 | + .priority = NF_IP6_PRI_NAT_DST + 1, | |
199 | +#endif | |
200 | + }, | |
201 | + { | |
202 | + /* imq_egress_ipv6 */ | |
203 | + .hook = imq_nf_hook, | |
204 | + .owner = THIS_MODULE, | |
205 | + .pf = PF_INET6, | |
206 | + .hooknum = NF_INET_POST_ROUTING, | |
207 | +#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA) | |
208 | + .priority = NF_IP6_PRI_LAST, | |
209 | +#else | |
210 | + .priority = NF_IP6_PRI_NAT_SRC - 1, | |
211 | +#endif | |
212 | + }, | |
213 | +#endif | |
214 | +}; | |
215 | + | |
216 | +#if defined(CONFIG_IMQ_NUM_DEVS) | |
217 | +static int numdevs = CONFIG_IMQ_NUM_DEVS; | |
218 | +#else | |
219 | +static int numdevs = IMQ_MAX_DEVS; | |
220 | +#endif | |
221 | + | |
222 | +static struct net_device *imq_devs_cache[IMQ_MAX_DEVS]; | |
223 | + | |
224 | +#define IMQ_MAX_QUEUES 32 | |
225 | +static int numqueues = 1; | |
226 | +static u32 imq_hashrnd; | |
227 | + | |
228 | +static inline __be16 pppoe_proto(const struct sk_buff *skb) | |
229 | +{ | |
230 | + return *((__be16 *)(skb_mac_header(skb) + ETH_HLEN + | |
231 | + sizeof(struct pppoe_hdr))); | |
232 | +} | |
233 | + | |
234 | +static u16 imq_hash(struct net_device *dev, struct sk_buff *skb) | |
235 | +{ | |
236 | + unsigned int pull_len; | |
237 | + u16 protocol = skb->protocol; | |
238 | + u32 addr1, addr2; | |
239 | + u32 hash, ihl = 0; | |
240 | + union { | |
241 | + u16 in16[2]; | |
242 | + u32 in32; | |
243 | + } ports; | |
244 | + u8 ip_proto; | |
245 | + | |
246 | + pull_len = 0; | |
247 | + | |
248 | +recheck: | |
249 | + switch (protocol) { | |
250 | + case htons(ETH_P_8021Q): { | |
251 | + if (unlikely(skb_pull(skb, VLAN_HLEN) == NULL)) | |
252 | + goto other; | |
253 | + | |
254 | + pull_len += VLAN_HLEN; | |
255 | + skb->network_header += VLAN_HLEN; | |
256 | + | |
257 | + protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto; | |
258 | + goto recheck; | |
259 | + } | |
260 | + | |
261 | + case htons(ETH_P_PPP_SES): { | |
262 | + if (unlikely(skb_pull(skb, PPPOE_SES_HLEN) == NULL)) | |
263 | + goto other; | |
264 | + | |
265 | + pull_len += PPPOE_SES_HLEN; | |
266 | + skb->network_header += PPPOE_SES_HLEN; | |
267 | + | |
268 | + protocol = pppoe_proto(skb); | |
269 | + goto recheck; | |
270 | + } | |
271 | + | |
272 | + case htons(ETH_P_IP): { | |
273 | + const struct iphdr *iph = ip_hdr(skb); | |
274 | + | |
275 | + if (unlikely(!pskb_may_pull(skb, sizeof(struct iphdr)))) | |
276 | + goto other; | |
277 | + | |
278 | + addr1 = iph->daddr; | |
279 | + addr2 = iph->saddr; | |
280 | + | |
281 | + ip_proto = !(ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) ? | |
282 | + iph->protocol : 0; | |
283 | + ihl = ip_hdrlen(skb); | |
284 | + | |
285 | + break; | |
286 | + } | |
287 | +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
288 | + case htons(ETH_P_IPV6): { | |
289 | + const struct ipv6hdr *iph = ipv6_hdr(skb); | |
290 | + | |
291 | + if (unlikely(!pskb_may_pull(skb, sizeof(struct ipv6hdr)))) | |
292 | + goto other; | |
293 | + | |
294 | + addr1 = iph->daddr.s6_addr32[3]; | |
295 | + addr2 = iph->saddr.s6_addr32[3]; | |
296 | + ihl = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &ip_proto); | |
297 | + if (unlikely(ihl < 0)) | |
298 | + goto other; | |
299 | + | |
300 | + break; | |
301 | + } | |
302 | +#endif | |
303 | + default: | |
304 | +other: | |
305 | + if (pull_len != 0) { | |
306 | + skb_push(skb, pull_len); | |
307 | + skb->network_header -= pull_len; | |
308 | + } | |
309 | + | |
310 | + return (u16)(ntohs(protocol) % dev->real_num_tx_queues); | |
311 | + } | |
312 | + | |
313 | + if (addr1 > addr2) | |
314 | + swap(addr1, addr2); | |
315 | + | |
316 | + switch (ip_proto) { | |
317 | + case IPPROTO_TCP: | |
318 | + case IPPROTO_UDP: | |
319 | + case IPPROTO_DCCP: | |
320 | + case IPPROTO_ESP: | |
321 | + case IPPROTO_AH: | |
322 | + case IPPROTO_SCTP: | |
323 | + case IPPROTO_UDPLITE: { | |
324 | + if (likely(skb_copy_bits(skb, ihl, &ports.in32, 4) >= 0)) { | |
325 | + if (ports.in16[0] > ports.in16[1]) | |
326 | + swap(ports.in16[0], ports.in16[1]); | |
327 | + break; | |
328 | + } | |
329 | + /* fall-through */ | |
330 | + } | |
331 | + default: | |
332 | + ports.in32 = 0; | |
333 | + break; | |
334 | + } | |
335 | + | |
336 | + if (pull_len != 0) { | |
337 | + skb_push(skb, pull_len); | |
338 | + skb->network_header -= pull_len; | |
339 | + } | |
340 | + | |
341 | + hash = jhash_3words(addr1, addr2, ports.in32, imq_hashrnd ^ ip_proto); | |
342 | + | |
343 | + return (u16)(((u64)hash * dev->real_num_tx_queues) >> 32); | |
344 | +} | |
345 | + | |
346 | +static inline bool sk_tx_queue_recorded(struct sock *sk) | |
347 | +{ | |
348 | + return (sk_tx_queue_get(sk) >= 0); | |
349 | +} | |
350 | + | |
351 | +static struct netdev_queue *imq_select_queue(struct net_device *dev, | |
352 | + struct sk_buff *skb) | |
353 | +{ | |
354 | + u16 queue_index = 0; | |
355 | + u32 hash; | |
356 | + | |
357 | + if (likely(dev->real_num_tx_queues == 1)) | |
358 | + goto out; | |
359 | + | |
360 | + /* IMQ can be receiving ingress or engress packets. */ | |
361 | + | |
362 | + /* Check first for if rx_queue is set */ | |
363 | + if (skb_rx_queue_recorded(skb)) { | |
364 | + queue_index = skb_get_rx_queue(skb); | |
365 | + goto out; | |
366 | + } | |
367 | + | |
368 | + /* Check if socket has tx_queue set */ | |
369 | + if (sk_tx_queue_recorded(skb->sk)) { | |
370 | + queue_index = sk_tx_queue_get(skb->sk); | |
371 | + goto out; | |
372 | + } | |
373 | + | |
374 | + /* Try use socket hash */ | |
375 | + if (skb->sk && skb->sk->sk_hash) { | |
376 | + hash = skb->sk->sk_hash; | |
377 | + queue_index = | |
378 | + (u16)(((u64)hash * dev->real_num_tx_queues) >> 32); | |
379 | + goto out; | |
380 | + } | |
381 | + | |
382 | + /* Generate hash from packet data */ | |
383 | + queue_index = imq_hash(dev, skb); | |
384 | + | |
385 | +out: | |
386 | + if (unlikely(queue_index >= dev->real_num_tx_queues)) | |
387 | + queue_index = (u16)((u32)queue_index % dev->real_num_tx_queues); | |
388 | + | |
389 | + skb_set_queue_mapping(skb, queue_index); | |
390 | + return netdev_get_tx_queue(dev, queue_index); | |
391 | +} | |
392 | + | |
393 | +static struct net_device_stats *imq_get_stats(struct net_device *dev) | |
394 | +{ | |
395 | + return &dev->stats; | |
396 | +} | |
397 | + | |
398 | +/* called for packets kfree'd in qdiscs at places other than enqueue */ | |
399 | +static void imq_skb_destructor(struct sk_buff *skb) | |
400 | +{ | |
401 | + struct nf_queue_entry *entry = skb->nf_queue_entry; | |
402 | + | |
403 | + skb->nf_queue_entry = NULL; | |
404 | + | |
405 | + if (entry) { | |
406 | + nf_queue_entry_release_refs(entry); | |
407 | + kfree(entry); | |
408 | + } | |
409 | + | |
410 | + skb_restore_cb(skb); /* kfree backup */ | |
411 | +} | |
412 | + | |
413 | +static void imq_done_check_queue_mapping(struct sk_buff *skb, | |
414 | + struct net_device *dev) | |
415 | +{ | |
416 | + unsigned int queue_index; | |
417 | + | |
418 | + /* Don't let queue_mapping be left too large after exiting IMQ */ | |
419 | + if (likely(skb->dev != dev && skb->dev != NULL)) { | |
420 | + queue_index = skb_get_queue_mapping(skb); | |
421 | + if (unlikely(queue_index >= skb->dev->real_num_tx_queues)) { | |
422 | + queue_index = (u16)((u32)queue_index % | |
423 | + skb->dev->real_num_tx_queues); | |
424 | + skb_set_queue_mapping(skb, queue_index); | |
425 | + } | |
426 | + } else { | |
427 | + /* skb->dev was IMQ device itself or NULL, be on safe side and | |
428 | + * just clear queue mapping. | |
429 | + */ | |
430 | + skb_set_queue_mapping(skb, 0); | |
431 | + } | |
432 | +} | |
433 | + | |
434 | +static netdev_tx_t imq_dev_xmit(struct sk_buff *skb, struct net_device *dev) | |
435 | +{ | |
436 | + struct nf_queue_entry *entry = skb->nf_queue_entry; | |
437 | + | |
438 | + skb->nf_queue_entry = NULL; | |
439 | + dev->trans_start = jiffies; | |
440 | + | |
441 | + dev->stats.tx_bytes += skb->len; | |
442 | + dev->stats.tx_packets++; | |
443 | + | |
444 | + if (unlikely(entry == NULL)) { | |
445 | + /* We don't know what is going on here.. packet is queued for | |
446 | + * imq device, but (probably) not by us. | |
447 | + * | |
448 | + * If this packet was not send here by imq_nf_queue(), then | |
449 | + * skb_save_cb() was not used and skb_free() should not show: | |
450 | + * WARNING: IMQ: kfree_skb: skb->cb_next:.. | |
451 | + * and/or | |
452 | + * WARNING: IMQ: kfree_skb: skb->nf_queue_entry... | |
453 | + * | |
454 | + * However if this message is shown, then IMQ is somehow broken | |
455 | + * and you should report this to linuximq.net. | |
456 | + */ | |
457 | + | |
458 | + /* imq_dev_xmit is black hole that eats all packets, report that | |
459 | + * we eat this packet happily and increase dropped counters. | |
460 | + */ | |
461 | + | |
462 | + dev->stats.tx_dropped++; | |
463 | + dev_kfree_skb(skb); | |
464 | + | |
465 | + return NETDEV_TX_OK; | |
466 | + } | |
467 | + | |
468 | + skb_restore_cb(skb); /* restore skb->cb */ | |
469 | + | |
470 | + skb->imq_flags = 0; | |
471 | + skb->destructor = NULL; | |
472 | + | |
473 | + imq_done_check_queue_mapping(skb, dev); | |
474 | + | |
475 | + nf_reinject(entry, NF_ACCEPT); | |
476 | + | |
477 | + return NETDEV_TX_OK; | |
478 | +} | |
479 | + | |
480 | +static struct net_device *get_imq_device_by_index(int index) | |
481 | +{ | |
482 | + struct net_device *dev = NULL; | |
483 | + struct net *net; | |
484 | + char buf[8]; | |
485 | + | |
486 | + /* get device by name and cache result */ | |
487 | + snprintf(buf, sizeof(buf), "imq%d", index); | |
488 | + | |
489 | + /* Search device from all namespaces. */ | |
490 | + for_each_net(net) { | |
491 | + dev = dev_get_by_name(net, buf); | |
492 | + if (dev) | |
493 | + break; | |
494 | + } | |
495 | + | |
496 | + if (WARN_ON_ONCE(dev == NULL)) { | |
497 | + /* IMQ device not found. Exotic config? */ | |
498 | + return ERR_PTR(-ENODEV); | |
499 | + } | |
500 | + | |
501 | + imq_devs_cache[index] = dev; | |
502 | + dev_put(dev); | |
503 | + | |
504 | + return dev; | |
505 | +} | |
506 | + | |
507 | +static int imq_nf_queue(struct nf_queue_entry *entry, unsigned queue_num) | |
508 | +{ | |
509 | + struct net_device *dev; | |
510 | + struct sk_buff *skb_orig, *skb, *skb_shared; | |
511 | + struct Qdisc *q; | |
512 | + struct netdev_queue *txq; | |
513 | + spinlock_t *root_lock; | |
514 | + int users, index; | |
515 | + int retval = -EINVAL; | |
516 | + unsigned int orig_queue_index; | |
517 | + | |
518 | + index = entry->skb->imq_flags & IMQ_F_IFMASK; | |
519 | + if (unlikely(index > numdevs - 1)) { | |
520 | + if (net_ratelimit()) | |
521 | + printk(KERN_WARNING | |
522 | + "IMQ: invalid device specified, highest is %u\n", | |
523 | + numdevs - 1); | |
524 | + retval = -EINVAL; | |
525 | + goto out; | |
526 | + } | |
527 | + | |
528 | + /* check for imq device by index from cache */ | |
529 | + dev = imq_devs_cache[index]; | |
530 | + if (unlikely(!dev)) { | |
531 | + dev = get_imq_device_by_index(index); | |
532 | + if (IS_ERR(dev)) { | |
533 | + retval = PTR_ERR(dev); | |
534 | + goto out; | |
535 | + } | |
536 | + } | |
537 | + | |
538 | + if (unlikely(!(dev->flags & IFF_UP))) { | |
539 | + entry->skb->imq_flags = 0; | |
540 | + nf_reinject(entry, NF_ACCEPT); | |
541 | + retval = 0; | |
542 | + goto out; | |
543 | + } | |
544 | + dev->last_rx = jiffies; | |
545 | + | |
546 | + skb = entry->skb; | |
547 | + skb_orig = NULL; | |
548 | + | |
549 | + /* skb has owner? => make clone */ | |
550 | + if (unlikely(skb->destructor)) { | |
551 | + skb_orig = skb; | |
552 | + skb = skb_clone(skb, GFP_ATOMIC); | |
553 | + if (unlikely(!skb)) { | |
554 | + retval = -ENOMEM; | |
555 | + goto out; | |
556 | + } | |
557 | + entry->skb = skb; | |
558 | + } | |
559 | + | |
560 | + skb->nf_queue_entry = entry; | |
561 | + | |
562 | + dev->stats.rx_bytes += skb->len; | |
563 | + dev->stats.rx_packets++; | |
564 | + | |
565 | + if (!skb->dev) { | |
566 | + /* skb->dev == NULL causes problems, try the find cause. */ | |
567 | + if (net_ratelimit()) { | |
568 | + dev_warn(&dev->dev, | |
569 | + "received packet with skb->dev == NULL\n"); | |
570 | + dump_stack(); | |
571 | + } | |
572 | + | |
573 | + skb->dev = dev; | |
574 | + } | |
575 | + | |
576 | + /* Disables softirqs for lock below */ | |
577 | + rcu_read_lock_bh(); | |
578 | + | |
579 | + /* Multi-queue selection */ | |
580 | + orig_queue_index = skb_get_queue_mapping(skb); | |
581 | + txq = imq_select_queue(dev, skb); | |
582 | + | |
583 | + q = rcu_dereference(txq->qdisc); | |
584 | + if (unlikely(!q->enqueue)) | |
585 | + goto packet_not_eaten_by_imq_dev; | |
586 | + | |
587 | + root_lock = qdisc_lock(q); | |
588 | + spin_lock(root_lock); | |
589 | + | |
590 | + users = atomic_read(&skb->users); | |
591 | + | |
592 | + skb_shared = skb_get(skb); /* increase reference count by one */ | |
593 | + skb_save_cb(skb_shared); /* backup skb->cb, as qdisc layer will | |
594 | + overwrite it */ | |
595 | + qdisc_enqueue_root(skb_shared, q); /* might kfree_skb */ | |
596 | + | |
597 | + if (likely(atomic_read(&skb_shared->users) == users + 1)) { | |
598 | + kfree_skb(skb_shared); /* decrease reference count by one */ | |
599 | + | |
600 | + skb->destructor = &imq_skb_destructor; | |
601 | + | |
602 | + /* cloned? */ | |
603 | + if (unlikely(skb_orig)) | |
604 | + kfree_skb(skb_orig); /* free original */ | |
605 | + | |
606 | + spin_unlock(root_lock); | |
607 | + rcu_read_unlock_bh(); | |
608 | + | |
609 | + /* schedule qdisc dequeue */ | |
610 | + __netif_schedule(q); | |
611 | + | |
612 | + retval = 0; | |
613 | + goto out; | |
614 | + } else { | |
615 | + skb_restore_cb(skb_shared); /* restore skb->cb */ | |
616 | + skb->nf_queue_entry = NULL; | |
617 | + /* qdisc dropped packet and decreased skb reference count of | |
618 | + * skb, so we don't really want to and try refree as that would | |
619 | + * actually destroy the skb. */ | |
620 | + spin_unlock(root_lock); | |
621 | + goto packet_not_eaten_by_imq_dev; | |
622 | + } | |
623 | + | |
624 | +packet_not_eaten_by_imq_dev: | |
625 | + skb_set_queue_mapping(skb, orig_queue_index); | |
626 | + rcu_read_unlock_bh(); | |
627 | + | |
628 | + /* cloned? restore original */ | |
629 | + if (unlikely(skb_orig)) { | |
630 | + kfree_skb(skb); | |
631 | + entry->skb = skb_orig; | |
632 | + } | |
633 | + retval = -1; | |
634 | +out: | |
635 | + return retval; | |
636 | +} | |
637 | + | |
638 | +static unsigned int imq_nf_hook(unsigned int hook, struct sk_buff *pskb, | |
639 | + const struct net_device *indev, | |
640 | + const struct net_device *outdev, | |
641 | + int (*okfn)(struct sk_buff *)) | |
642 | +{ | |
643 | + return (pskb->imq_flags & IMQ_F_ENQUEUE) ? NF_IMQ_QUEUE : NF_ACCEPT; | |
644 | +} | |
645 | + | |
646 | +static int imq_close(struct net_device *dev) | |
647 | +{ | |
648 | + netif_stop_queue(dev); | |
649 | + return 0; | |
650 | +} | |
651 | + | |
652 | +static int imq_open(struct net_device *dev) | |
653 | +{ | |
654 | + netif_start_queue(dev); | |
655 | + return 0; | |
656 | +} | |
657 | + | |
658 | +static const struct net_device_ops imq_netdev_ops = { | |
659 | + .ndo_open = imq_open, | |
660 | + .ndo_stop = imq_close, | |
661 | + .ndo_start_xmit = imq_dev_xmit, | |
662 | + .ndo_get_stats = imq_get_stats, | |
663 | +}; | |
664 | + | |
665 | +static void imq_setup(struct net_device *dev) | |
666 | +{ | |
667 | + dev->netdev_ops = &imq_netdev_ops; | |
668 | + dev->type = ARPHRD_VOID; | |
669 | + dev->mtu = 16000; /* too small? */ | |
670 | + dev->tx_queue_len = 11000; /* too big? */ | |
671 | + dev->flags = IFF_NOARP; | |
672 | + dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | | |
673 | + NETIF_F_GSO | NETIF_F_HW_CSUM | | |
674 | + NETIF_F_HIGHDMA; | |
675 | + dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | | |
676 | + IFF_TX_SKB_SHARING); | |
677 | +} | |
678 | + | |
679 | +static int imq_validate(struct nlattr *tb[], struct nlattr *data[]) | |
680 | +{ | |
681 | + int ret = 0; | |
682 | + | |
683 | + if (tb[IFLA_ADDRESS]) { | |
684 | + if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { | |
685 | + ret = -EINVAL; | |
686 | + goto end; | |
687 | + } | |
688 | + if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { | |
689 | + ret = -EADDRNOTAVAIL; | |
690 | + goto end; | |
691 | + } | |
692 | + } | |
693 | + return 0; | |
694 | +end: | |
695 | + printk(KERN_WARNING "IMQ: imq_validate failed (%d)\n", ret); | |
696 | + return ret; | |
697 | +} | |
698 | + | |
699 | +static struct rtnl_link_ops imq_link_ops __read_mostly = { | |
700 | + .kind = "imq", | |
701 | + .priv_size = 0, | |
702 | + .setup = imq_setup, | |
703 | + .validate = imq_validate, | |
704 | +}; | |
705 | + | |
706 | +static const struct nf_queue_handler imq_nfqh = { | |
707 | + .name = "imq", | |
708 | + .outfn = imq_nf_queue, | |
709 | +}; | |
710 | + | |
711 | +static int __init imq_init_hooks(void) | |
712 | +{ | |
713 | + int ret; | |
714 | + | |
715 | + nf_register_queue_imq_handler(&imq_nfqh); | |
716 | + | |
717 | + ret = nf_register_hooks(imq_ops, ARRAY_SIZE(imq_ops)); | |
718 | + if (ret < 0) | |
719 | + nf_unregister_queue_imq_handler(); | |
720 | + | |
721 | + return ret; | |
722 | +} | |
723 | + | |
724 | +static int __init imq_init_one(int index) | |
725 | +{ | |
726 | + struct net_device *dev; | |
727 | + int ret; | |
728 | + | |
729 | + dev = alloc_netdev_mq(0, "imq%d", imq_setup, numqueues); | |
730 | + if (!dev) | |
731 | + return -ENOMEM; | |
732 | + | |
733 | + ret = dev_alloc_name(dev, dev->name); | |
734 | + if (ret < 0) | |
735 | + goto fail; | |
736 | + | |
737 | + dev->rtnl_link_ops = &imq_link_ops; | |
738 | + ret = register_netdevice(dev); | |
739 | + if (ret < 0) | |
740 | + goto fail; | |
741 | + | |
742 | + return 0; | |
743 | +fail: | |
744 | + free_netdev(dev); | |
745 | + return ret; | |
746 | +} | |
747 | + | |
748 | +static int __init imq_init_devs(void) | |
749 | +{ | |
750 | + int err, i; | |
751 | + | |
752 | + if (numdevs < 1 || numdevs > IMQ_MAX_DEVS) { | |
753 | + printk(KERN_ERR "IMQ: numdevs has to be betweed 1 and %u\n", | |
754 | + IMQ_MAX_DEVS); | |
755 | + return -EINVAL; | |
756 | + } | |
757 | + | |
758 | + if (numqueues < 1 || numqueues > IMQ_MAX_QUEUES) { | |
759 | + printk(KERN_ERR "IMQ: numqueues has to be betweed 1 and %u\n", | |
760 | + IMQ_MAX_QUEUES); | |
761 | + return -EINVAL; | |
762 | + } | |
763 | + | |
764 | + get_random_bytes(&imq_hashrnd, sizeof(imq_hashrnd)); | |
765 | + | |
766 | + rtnl_lock(); | |
767 | + err = __rtnl_link_register(&imq_link_ops); | |
768 | + | |
769 | + for (i = 0; i < numdevs && !err; i++) | |
770 | + err = imq_init_one(i); | |
771 | + | |
772 | + if (err) { | |
773 | + __rtnl_link_unregister(&imq_link_ops); | |
774 | + memset(imq_devs_cache, 0, sizeof(imq_devs_cache)); | |
775 | + } | |
776 | + rtnl_unlock(); | |
777 | + | |
778 | + return err; | |
779 | +} | |
780 | + | |
781 | +static int __init imq_init_module(void) | |
782 | +{ | |
783 | + int err; | |
784 | + | |
785 | +#if defined(CONFIG_IMQ_NUM_DEVS) | |
786 | + BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS > 16); | |
787 | + BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS < 2); | |
788 | + BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS - 1 > IMQ_F_IFMASK); | |
789 | +#endif | |
790 | + | |
791 | + err = imq_init_devs(); | |
792 | + if (err) { | |
793 | + printk(KERN_ERR "IMQ: Error trying imq_init_devs(net)\n"); | |
794 | + return err; | |
795 | + } | |
796 | + | |
797 | + err = imq_init_hooks(); | |
798 | + if (err) { | |
799 | + printk(KERN_ERR "IMQ: Error trying imq_init_hooks()\n"); | |
800 | + rtnl_link_unregister(&imq_link_ops); | |
801 | + memset(imq_devs_cache, 0, sizeof(imq_devs_cache)); | |
802 | + return err; | |
803 | + } | |
804 | + | |
805 | + printk(KERN_INFO "IMQ driver loaded successfully. " | |
806 | + "(numdevs = %d, numqueues = %d)\n", numdevs, numqueues); | |
807 | + | |
808 | +#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB) | |
809 | + printk(KERN_INFO "\tHooking IMQ before NAT on PREROUTING.\n"); | |
810 | +#else | |
811 | + printk(KERN_INFO "\tHooking IMQ after NAT on PREROUTING.\n"); | |
812 | +#endif | |
813 | +#if defined(CONFIG_IMQ_BEHAVIOR_AB) || defined(CONFIG_IMQ_BEHAVIOR_BB) | |
814 | + printk(KERN_INFO "\tHooking IMQ before NAT on POSTROUTING.\n"); | |
815 | +#else | |
816 | + printk(KERN_INFO "\tHooking IMQ after NAT on POSTROUTING.\n"); | |
817 | +#endif | |
818 | + | |
819 | + return 0; | |
820 | +} | |
821 | + | |
822 | +static void __exit imq_unhook(void) | |
823 | +{ | |
824 | + nf_unregister_hooks(imq_ops, ARRAY_SIZE(imq_ops)); | |
825 | + nf_unregister_queue_imq_handler(); | |
826 | +} | |
827 | + | |
828 | +static void __exit imq_cleanup_devs(void) | |
829 | +{ | |
830 | + rtnl_link_unregister(&imq_link_ops); | |
831 | + memset(imq_devs_cache, 0, sizeof(imq_devs_cache)); | |
832 | +} | |
833 | + | |
834 | +static void __exit imq_exit_module(void) | |
835 | +{ | |
836 | + imq_unhook(); | |
837 | + imq_cleanup_devs(); | |
838 | + printk(KERN_INFO "IMQ driver unloaded successfully.\n"); | |
839 | +} | |
840 | + | |
841 | +module_init(imq_init_module); | |
842 | +module_exit(imq_exit_module); | |
843 | + | |
844 | +module_param(numdevs, int, 0); | |
845 | +module_param(numqueues, int, 0); | |
846 | +MODULE_PARM_DESC(numdevs, "number of IMQ devices (how many imq* devices will " | |
847 | + "be created)"); | |
848 | +MODULE_PARM_DESC(numqueues, "number of queues per IMQ device"); | |
849 | +MODULE_AUTHOR("http://www.linuximq.net"); | |
850 | +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See " | |
851 | + "http://www.linuximq.net/ for more information."); | |
852 | +MODULE_LICENSE("GPL"); | |
853 | +MODULE_ALIAS_RTNL_LINK("imq"); | |
854 | + | |
855 | diff -uNr linux-3.2/drivers/net/Kconfig linux-3.2-imq/drivers/net/Kconfig | |
856 | --- linux-3.2/drivers/net/Kconfig 2011-10-24 10:10:05.000000000 +0300 | |
857 | +++ linux-3.2-imq/drivers/net/Kconfig 2011-11-04 11:12:52.106390309 +0200 | |
858 | @@ -90,6 +90,125 @@ | |
859 | To compile this driver as a module, choose M here: the module | |
860 | will be called eql. If unsure, say N. | |
861 | ||
862 | +config IMQ | |
863 | + tristate "IMQ (intermediate queueing device) support" | |
864 | + depends on NETDEVICES && NETFILTER | |
865 | + ---help--- | |
866 | + The IMQ device(s) is used as placeholder for QoS queueing | |
867 | + disciplines. Every packet entering/leaving the IP stack can be | |
868 | + directed through the IMQ device where it's enqueued/dequeued to the | |
869 | + attached qdisc. This allows you to treat network devices as classes | |
870 | + and distribute bandwidth among them. Iptables is used to specify | |
871 | + through which IMQ device, if any, packets travel. | |
872 | + | |
873 | + More information at: http://www.linuximq.net/ | |
874 | + | |
875 | + To compile this driver as a module, choose M here: the module | |
876 | + will be called imq. If unsure, say N. | |
877 | + | |
878 | +choice | |
879 | + prompt "IMQ behavior (PRE/POSTROUTING)" | |
880 | + depends on IMQ | |
881 | + default IMQ_BEHAVIOR_AB | |
882 | + help | |
883 | + This setting defines how IMQ behaves in respect to its | |
884 | + hooking in PREROUTING and POSTROUTING. | |
885 | + | |
886 | + IMQ can work in any of the following ways: | |
887 | + | |
888 | + PREROUTING | POSTROUTING | |
889 | + -----------------|------------------- | |
890 | + #1 After NAT | After NAT | |
891 | + #2 After NAT | Before NAT | |
892 | + #3 Before NAT | After NAT | |
893 | + #4 Before NAT | Before NAT | |
894 | + | |
895 | + The default behavior is to hook before NAT on PREROUTING | |
896 | + and after NAT on POSTROUTING (#3). | |
897 | + | |
898 | + This settings are specially usefull when trying to use IMQ | |
899 | + to shape NATed clients. | |
900 | + | |
901 | + More information can be found at: www.linuximq.net | |
902 | + | |
903 | + If not sure leave the default settings alone. | |
904 | + | |
905 | +config IMQ_BEHAVIOR_AA | |
906 | + bool "IMQ AA" | |
907 | + help | |
908 | + This setting defines how IMQ behaves in respect to its | |
909 | + hooking in PREROUTING and POSTROUTING. | |
910 | + | |
911 | + Choosing this option will make IMQ hook like this: | |
912 | + | |
913 | + PREROUTING: After NAT | |
914 | + POSTROUTING: After NAT | |
915 | + | |
916 | + More information can be found at: www.linuximq.net | |
917 | + | |
918 | + If not sure leave the default settings alone. | |
919 | + | |
920 | +config IMQ_BEHAVIOR_AB | |
921 | + bool "IMQ AB" | |
922 | + help | |
923 | + This setting defines how IMQ behaves in respect to its | |
924 | + hooking in PREROUTING and POSTROUTING. | |
925 | + | |
926 | + Choosing this option will make IMQ hook like this: | |
927 | + | |
928 | + PREROUTING: After NAT | |
929 | + POSTROUTING: Before NAT | |
930 | + | |
931 | + More information can be found at: www.linuximq.net | |
932 | + | |
933 | + If not sure leave the default settings alone. | |
934 | + | |
935 | +config IMQ_BEHAVIOR_BA | |
936 | + bool "IMQ BA" | |
937 | + help | |
938 | + This setting defines how IMQ behaves in respect to its | |
939 | + hooking in PREROUTING and POSTROUTING. | |
940 | + | |
941 | + Choosing this option will make IMQ hook like this: | |
942 | + | |
943 | + PREROUTING: Before NAT | |
944 | + POSTROUTING: After NAT | |
945 | + | |
946 | + More information can be found at: www.linuximq.net | |
947 | + | |
948 | + If not sure leave the default settings alone. | |
949 | + | |
950 | +config IMQ_BEHAVIOR_BB | |
951 | + bool "IMQ BB" | |
952 | + help | |
953 | + This setting defines how IMQ behaves in respect to its | |
954 | + hooking in PREROUTING and POSTROUTING. | |
955 | + | |
956 | + Choosing this option will make IMQ hook like this: | |
957 | + | |
958 | + PREROUTING: Before NAT | |
959 | + POSTROUTING: Before NAT | |
960 | + | |
961 | + More information can be found at: www.linuximq.net | |
962 | + | |
963 | + If not sure leave the default settings alone. | |
964 | + | |
965 | +endchoice | |
966 | + | |
967 | +config IMQ_NUM_DEVS | |
968 | + int "Number of IMQ devices" | |
969 | + range 2 16 | |
970 | + depends on IMQ | |
971 | + default "16" | |
972 | + help | |
973 | + This setting defines how many IMQ devices will be created. | |
974 | + | |
975 | + The default value is 16. | |
976 | + | |
977 | + More information can be found at: www.linuximq.net | |
978 | + | |
979 | + If not sure leave the default settings alone. | |
980 | + | |
981 | config NET_FC | |
982 | bool "Fibre Channel driver support" | |
983 | depends on SCSI && PCI | |
984 | diff -uNr linux-3.2/drivers/net/Makefile linux-3.2-imq/drivers/net/Makefile | |
985 | --- linux-3.2/drivers/net/Makefile 2011-10-24 10:10:05.000000000 +0300 | |
986 | +++ linux-3.2-imq/drivers/net/Makefile 2011-11-04 11:12:52.106390309 +0200 | |
987 | @@ -8,6 +8,7 @@ | |
988 | obj-$(CONFIG_BONDING) += bonding/ | |
989 | obj-$(CONFIG_DUMMY) += dummy.o | |
990 | obj-$(CONFIG_EQUALIZER) += eql.o | |
991 | +obj-$(CONFIG_IMQ) += imq.o | |
992 | obj-$(CONFIG_IFB) += ifb.o | |
993 | obj-$(CONFIG_MACVLAN) += macvlan.o | |
994 | obj-$(CONFIG_MACVTAP) += macvtap.o | |
995 | diff -uNr linux-3.2/include/linux/imq.h linux-3.2-imq/include/linux/imq.h | |
996 | --- linux-3.2/include/linux/imq.h 1970-01-01 02:00:00.000000000 +0200 | |
997 | +++ linux-3.2-imq/include/linux/imq.h 2011-11-04 11:12:52.109723710 +0200 | |
998 | @@ -0,0 +1,13 @@ | |
999 | +#ifndef _IMQ_H | |
1000 | +#define _IMQ_H | |
1001 | + | |
1002 | +/* IFMASK (16 device indexes, 0 to 15) and flag(s) fit in 5 bits */ | |
1003 | +#define IMQ_F_BITS 5 | |
1004 | + | |
1005 | +#define IMQ_F_IFMASK 0x0f | |
1006 | +#define IMQ_F_ENQUEUE 0x10 | |
1007 | + | |
1008 | +#define IMQ_MAX_DEVS (IMQ_F_IFMASK + 1) | |
1009 | + | |
1010 | +#endif /* _IMQ_H */ | |
1011 | + | |
1012 | diff -uNr linux-3.2/include/linux/netfilter/xt_IMQ.h linux-3.2-imq/include/linux/netfilter/xt_IMQ.h | |
1013 | --- linux-3.2/include/linux/netfilter/xt_IMQ.h 1970-01-01 02:00:00.000000000 +0200 | |
1014 | +++ linux-3.2-imq/include/linux/netfilter/xt_IMQ.h 2011-11-04 11:12:52.109723710 +0200 | |
1015 | @@ -0,0 +1,9 @@ | |
1016 | +#ifndef _XT_IMQ_H | |
1017 | +#define _XT_IMQ_H | |
1018 | + | |
1019 | +struct xt_imq_info { | |
1020 | + unsigned int todev; /* target imq device */ | |
1021 | +}; | |
1022 | + | |
1023 | +#endif /* _XT_IMQ_H */ | |
1024 | + | |
1025 | diff -uNr linux-3.2/include/linux/netfilter.h linux-3.2-imq/include/linux/netfilter.h | |
1026 | --- linux-3.2/include/linux/netfilter.h 2011-10-24 10:10:05.000000000 +0300 | |
1027 | +++ linux-3.2-imq/include/linux/netfilter.h 2011-11-04 11:12:52.109723710 +0200 | |
1028 | @@ -22,7 +22,8 @@ | |
1029 | #define NF_QUEUE 3 | |
1030 | #define NF_REPEAT 4 | |
1031 | #define NF_STOP 5 | |
1032 | -#define NF_MAX_VERDICT NF_STOP | |
1033 | +#define NF_IMQ_QUEUE 6 | |
1034 | +#define NF_MAX_VERDICT NF_IMQ_QUEUE | |
1035 | ||
1036 | /* we overload the higher bits for encoding auxiliary data such as the queue | |
1037 | * number or errno values. Not nice, but better than additional function | |
1038 | diff -uNr linux-3.2/include/linux/netfilter_ipv4/ipt_IMQ.h linux-3.2-imq/include/linux/netfilter_ipv4/ipt_IMQ.h | |
1039 | --- linux-3.2/include/linux/netfilter_ipv4/ipt_IMQ.h 1970-01-01 02:00:00.000000000 +0200 | |
1040 | +++ linux-3.2-imq/include/linux/netfilter_ipv4/ipt_IMQ.h 2011-11-04 11:12:52.109723710 +0200 | |
1041 | @@ -0,0 +1,10 @@ | |
1042 | +#ifndef _IPT_IMQ_H | |
1043 | +#define _IPT_IMQ_H | |
1044 | + | |
1045 | +/* Backwards compatibility for old userspace */ | |
1046 | +#include <linux/netfilter/xt_IMQ.h> | |
1047 | + | |
1048 | +#define ipt_imq_info xt_imq_info | |
1049 | + | |
1050 | +#endif /* _IPT_IMQ_H */ | |
1051 | + | |
1052 | diff -uNr linux-3.2/include/linux/netfilter_ipv6/ip6t_IMQ.h linux-3.2-imq/include/linux/netfilter_ipv6/ip6t_IMQ.h | |
1053 | --- linux-3.2/include/linux/netfilter_ipv6/ip6t_IMQ.h 1970-01-01 02:00:00.000000000 +0200 | |
1054 | +++ linux-3.2-imq/include/linux/netfilter_ipv6/ip6t_IMQ.h 2011-11-04 11:12:52.113057113 +0200 | |
1055 | @@ -0,0 +1,10 @@ | |
1056 | +#ifndef _IP6T_IMQ_H | |
1057 | +#define _IP6T_IMQ_H | |
1058 | + | |
1059 | +/* Backwards compatibility for old userspace */ | |
1060 | +#include <linux/netfilter/xt_IMQ.h> | |
1061 | + | |
1062 | +#define ip6t_imq_info xt_imq_info | |
1063 | + | |
1064 | +#endif /* _IP6T_IMQ_H */ | |
1065 | + | |
1066 | diff -uNr linux-3.2/include/linux/skbuff.h linux-3.2-imq/include/linux/skbuff.h | |
1067 | --- linux-3.2/include/linux/skbuff.h 2011-10-24 10:10:05.000000000 +0300 | |
1068 | +++ linux-3.2-imq/include/linux/skbuff.h 2011-11-04 11:12:52.116390515 +0200 | |
1069 | @@ -30,6 +30,9 @@ | |
1070 | #include <linux/dmaengine.h> | |
1071 | #include <linux/hrtimer.h> | |
1072 | #include <linux/dma-mapping.h> | |
1073 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1074 | +#include <linux/imq.h> | |
1075 | +#endif | |
1076 | ||
1077 | /* Don't change this without changing skb_csum_unnecessary! */ | |
1078 | #define CHECKSUM_NONE 0 | |
1079 | @@ -386,6 +389,9 @@ | |
1080 | * first. This is owned by whoever has the skb queued ATM. | |
1081 | */ | |
1082 | char cb[48] __aligned(8); | |
1083 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1084 | + void *cb_next; | |
1085 | +#endif | |
1086 | ||
1087 | unsigned long _skb_refdst; | |
1088 | #ifdef CONFIG_XFRM | |
1089 | @@ -424,6 +430,9 @@ | |
1090 | #ifdef NET_SKBUFF_NF_DEFRAG_NEEDED | |
1091 | struct sk_buff *nfct_reasm; | |
1092 | #endif | |
1093 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1094 | + struct nf_queue_entry *nf_queue_entry; | |
1095 | +#endif | |
1096 | #ifdef CONFIG_BRIDGE_NETFILTER | |
1097 | struct nf_bridge_info *nf_bridge; | |
1098 | #endif | |
1099 | @@ -449,6 +458,10 @@ | |
1100 | ||
1101 | /* 0/13 bit hole */ | |
1102 | ||
1103 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1104 | + __u8 imq_flags:IMQ_F_BITS; | |
1105 | +#endif | |
1106 | + | |
1107 | #ifdef CONFIG_NET_DMA | |
1108 | dma_cookie_t dma_cookie; | |
1109 | #endif | |
1110 | @@ -535,6 +548,12 @@ | |
1111 | return (struct rtable *)skb_dst(skb); | |
1112 | } | |
1113 | ||
1114 | + | |
1115 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1116 | +extern int skb_save_cb(struct sk_buff *skb); | |
1117 | +extern int skb_restore_cb(struct sk_buff *skb); | |
1118 | +#endif | |
1119 | + | |
1120 | extern void kfree_skb(struct sk_buff *skb); | |
1121 | extern void consume_skb(struct sk_buff *skb); | |
1122 | extern void __kfree_skb(struct sk_buff *skb); | |
1123 | @@ -2368,6 +2387,10 @@ | |
1124 | dst->nfct_reasm = src->nfct_reasm; | |
1125 | nf_conntrack_get_reasm(src->nfct_reasm); | |
1126 | #endif | |
1127 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1128 | + dst->imq_flags = src->imq_flags; | |
1129 | + dst->nf_queue_entry = src->nf_queue_entry; | |
1130 | +#endif | |
1131 | #ifdef CONFIG_BRIDGE_NETFILTER | |
1132 | dst->nf_bridge = src->nf_bridge; | |
1133 | nf_bridge_get(src->nf_bridge); | |
1134 | diff -uNr linux-3.2/include/net/netfilter/nf_queue.h linux-3.2-imq/include/net/netfilter/nf_queue.h | |
1135 | --- linux-3.2/include/net/netfilter/nf_queue.h 2011-10-24 10:10:05.000000000 +0300 | |
1136 | +++ linux-3.2-imq/include/net/netfilter/nf_queue.h 2011-11-04 11:12:52.116390515 +0200 | |
1137 | @@ -30,5 +30,11 @@ | |
1138 | const struct nf_queue_handler *qh); | |
1139 | extern void nf_unregister_queue_handlers(const struct nf_queue_handler *qh); | |
1140 | extern void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict); | |
1141 | +extern void nf_queue_entry_release_refs(struct nf_queue_entry *entry); | |
1142 | + | |
1143 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1144 | +extern void nf_register_queue_imq_handler(const struct nf_queue_handler *qh); | |
1145 | +extern void nf_unregister_queue_imq_handler(void); | |
1146 | +#endif | |
1147 | ||
1148 | #endif /* _NF_QUEUE_H */ | |
1149 | diff -uNr linux-3.2/net/core/dev.c linux-3.2-imq/net/core/dev.c | |
1150 | --- linux-3.2/net/core/dev.c 2011-10-24 10:10:05.000000000 +0300 | |
1151 | +++ linux-3.2-imq/net/core/dev.c 2011-11-04 11:12:52.119723915 +0200 | |
1152 | @@ -98,6 +98,9 @@ | |
1153 | #include <net/net_namespace.h> | |
1154 | #include <net/sock.h> | |
1155 | #include <linux/rtnetlink.h> | |
1156 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1157 | +#include <linux/imq.h> | |
1158 | +#endif | |
1159 | #include <linux/proc_fs.h> | |
1160 | #include <linux/seq_file.h> | |
1161 | #include <linux/stat.h> | |
1162 | @@ -2185,7 +2188,12 @@ | |
1163 | if (dev->priv_flags & IFF_XMIT_DST_RELEASE) | |
1164 | skb_dst_drop(skb); | |
1165 | ||
1166 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1167 | + if (!list_empty(&ptype_all) && | |
1168 | + !(skb->imq_flags & IMQ_F_ENQUEUE)) | |
1169 | +#else | |
1170 | if (!list_empty(&ptype_all)) | |
1171 | +#endif | |
1172 | dev_queue_xmit_nit(skb, dev); | |
1173 | ||
1174 | skb_orphan_try(skb); | |
1175 | diff -uNr linux-3.2/net/core/skbuff.c linux-3.2-imq/net/core/skbuff.c | |
1176 | --- linux-3.2/net/core/skbuff.c 2011-10-24 10:10:05.000000000 +0300 | |
1177 | +++ linux-3.2-imq/net/core/skbuff.c 2011-11-04 11:12:52.123057315 +0200 | |
1178 | @@ -73,6 +73,9 @@ | |
1179 | ||
1180 | static struct kmem_cache *skbuff_head_cache __read_mostly; | |
1181 | static struct kmem_cache *skbuff_fclone_cache __read_mostly; | |
1182 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1183 | +static struct kmem_cache *skbuff_cb_store_cache __read_mostly; | |
1184 | +#endif | |
1185 | ||
1186 | static void sock_pipe_buf_release(struct pipe_inode_info *pipe, | |
1187 | struct pipe_buffer *buf) | |
1188 | @@ -92,6 +95,82 @@ | |
1189 | return 1; | |
1190 | } | |
1191 | ||
1192 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1193 | +/* Control buffer save/restore for IMQ devices */ | |
1194 | +struct skb_cb_table { | |
1195 | + char cb[48] __aligned(8); | |
1196 | + void *cb_next; | |
1197 | + atomic_t refcnt; | |
1198 | +}; | |
1199 | + | |
1200 | +static DEFINE_SPINLOCK(skb_cb_store_lock); | |
1201 | + | |
1202 | +int skb_save_cb(struct sk_buff *skb) | |
1203 | +{ | |
1204 | + struct skb_cb_table *next; | |
1205 | + | |
1206 | + next = kmem_cache_alloc(skbuff_cb_store_cache, GFP_ATOMIC); | |
1207 | + if (!next) | |
1208 | + return -ENOMEM; | |
1209 | + | |
1210 | + BUILD_BUG_ON(sizeof(skb->cb) != sizeof(next->cb)); | |
1211 | + | |
1212 | + memcpy(next->cb, skb->cb, sizeof(skb->cb)); | |
1213 | + next->cb_next = skb->cb_next; | |
1214 | + | |
1215 | + atomic_set(&next->refcnt, 1); | |
1216 | + | |
1217 | + skb->cb_next = next; | |
1218 | + return 0; | |
1219 | +} | |
1220 | +EXPORT_SYMBOL(skb_save_cb); | |
1221 | + | |
1222 | +int skb_restore_cb(struct sk_buff *skb) | |
1223 | +{ | |
1224 | + struct skb_cb_table *next; | |
1225 | + | |
1226 | + if (!skb->cb_next) | |
1227 | + return 0; | |
1228 | + | |
1229 | + next = skb->cb_next; | |
1230 | + | |
1231 | + BUILD_BUG_ON(sizeof(skb->cb) != sizeof(next->cb)); | |
1232 | + | |
1233 | + memcpy(skb->cb, next->cb, sizeof(skb->cb)); | |
1234 | + skb->cb_next = next->cb_next; | |
1235 | + | |
1236 | + spin_lock(&skb_cb_store_lock); | |
1237 | + | |
1238 | + if (atomic_dec_and_test(&next->refcnt)) | |
1239 | + kmem_cache_free(skbuff_cb_store_cache, next); | |
1240 | + | |
1241 | + spin_unlock(&skb_cb_store_lock); | |
1242 | + | |
1243 | + return 0; | |
1244 | +} | |
1245 | +EXPORT_SYMBOL(skb_restore_cb); | |
1246 | + | |
1247 | +static void skb_copy_stored_cb(struct sk_buff *new, const struct sk_buff *__old) | |
1248 | +{ | |
1249 | + struct skb_cb_table *next; | |
1250 | + struct sk_buff *old; | |
1251 | + | |
1252 | + if (!__old->cb_next) { | |
1253 | + new->cb_next = NULL; | |
1254 | + return; | |
1255 | + } | |
1256 | + | |
1257 | + spin_lock(&skb_cb_store_lock); | |
1258 | + | |
1259 | + old = (struct sk_buff *)__old; | |
1260 | + | |
1261 | + next = old->cb_next; | |
1262 | + atomic_inc(&next->refcnt); | |
1263 | + new->cb_next = next; | |
1264 | + | |
1265 | + spin_unlock(&skb_cb_store_lock); | |
1266 | +} | |
1267 | +#endif | |
1268 | ||
1269 | /* Pipe buffer operations for a socket. */ | |
1270 | static const struct pipe_buf_operations sock_pipe_buf_ops = { | |
1271 | @@ -403,6 +482,26 @@ | |
1272 | WARN_ON(in_irq()); | |
1273 | skb->destructor(skb); | |
1274 | } | |
1275 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1276 | + /* This should not happen. When it does, avoid memleak by restoring | |
1277 | + the chain of cb-backups. */ | |
1278 | + while (skb->cb_next != NULL) { | |
1279 | + if (net_ratelimit()) | |
1280 | + printk(KERN_WARNING "IMQ: kfree_skb: skb->cb_next: " | |
1281 | + "%08x\n", (unsigned int)skb->cb_next); | |
1282 | + | |
1283 | + skb_restore_cb(skb); | |
1284 | + } | |
1285 | + /* This should not happen either, nf_queue_entry is nullified in | |
1286 | + * imq_dev_xmit(). If we have non-NULL nf_queue_entry then we are | |
1287 | + * leaking entry pointers, maybe memory. We don't know if this is | |
1288 | + * pointer to already freed memory, or should this be freed. | |
1289 | + * If this happens we need to add refcounting, etc for nf_queue_entry. | |
1290 | + */ | |
1291 | + if (skb->nf_queue_entry && net_ratelimit()) | |
1292 | + printk(KERN_WARNING | |
1293 | + "IMQ: kfree_skb: skb->nf_queue_entry != NULL"); | |
1294 | +#endif | |
1295 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1296 | nf_conntrack_put(skb->nfct); | |
1297 | #endif | |
1298 | @@ -547,6 +646,9 @@ | |
1299 | new->sp = secpath_get(old->sp); | |
1300 | #endif | |
1301 | memcpy(new->cb, old->cb, sizeof(old->cb)); | |
1302 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1303 | + skb_copy_stored_cb(new, old); | |
1304 | +#endif | |
1305 | new->csum = old->csum; | |
1306 | new->local_df = old->local_df; | |
1307 | new->pkt_type = old->pkt_type; | |
1308 | @@ -2907,6 +3009,13 @@ | |
1309 | 0, | |
1310 | SLAB_HWCACHE_ALIGN|SLAB_PANIC, | |
1311 | NULL); | |
1312 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1313 | + skbuff_cb_store_cache = kmem_cache_create("skbuff_cb_store_cache", | |
1314 | + sizeof(struct skb_cb_table), | |
1315 | + 0, | |
1316 | + SLAB_HWCACHE_ALIGN|SLAB_PANIC, | |
1317 | + NULL); | |
1318 | +#endif | |
1319 | } | |
1320 | ||
1321 | /** | |
1322 | diff -uNr linux-3.2/net/ipv6/ip6_output.c linux-3.2-imq/net/ipv6/ip6_output.c | |
1323 | --- linux-3.2/net/ipv6/ip6_output.c 2011-10-24 10:10:05.000000000 +0300 | |
1324 | +++ linux-3.2-imq/net/ipv6/ip6_output.c 2011-11-04 11:12:52.123057315 +0200 | |
1325 | @@ -102,9 +102,6 @@ | |
1326 | struct net_device *dev = dst->dev; | |
1327 | struct neighbour *neigh; | |
1328 | ||
1329 | - skb->protocol = htons(ETH_P_IPV6); | |
1330 | - skb->dev = dev; | |
1331 | - | |
1332 | if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr)) { | |
1333 | struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb)); | |
1334 | ||
1335 | @@ -170,6 +167,11 @@ | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | + /* IMQ-patch: moved setting skb->dev and skb->protocol from | |
1340 | + * ip6_finish_output2 to fix crashing at netif_skb_features(). */ | |
1341 | + skb->protocol = htons(ETH_P_IPV6); | |
1342 | + skb->dev = dev; | |
1343 | + | |
1344 | return NF_HOOK_COND(NFPROTO_IPV6, NF_INET_POST_ROUTING, skb, NULL, dev, | |
1345 | ip6_finish_output, | |
1346 | !(IP6CB(skb)->flags & IP6SKB_REROUTED)); | |
1347 | diff -uNr linux-3.2/net/netfilter/core.c linux-3.2-imq/net/netfilter/core.c | |
1348 | --- linux-3.2/net/netfilter/core.c 2011-10-24 10:10:05.000000000 +0300 | |
1349 | +++ linux-3.2-imq/net/netfilter/core.c 2011-11-04 11:12:52.123057315 +0200 | |
1350 | @@ -179,9 +179,11 @@ | |
1351 | ret = NF_DROP_GETERR(verdict); | |
1352 | if (ret == 0) | |
1353 | ret = -EPERM; | |
1354 | - } else if ((verdict & NF_VERDICT_MASK) == NF_QUEUE) { | |
1355 | + } else if ((verdict & NF_VERDICT_MASK) == NF_QUEUE || | |
1356 | + (verdict & NF_VERDICT_MASK) == NF_IMQ_QUEUE) { | |
1357 | int err = nf_queue(skb, elem, pf, hook, indev, outdev, okfn, | |
1358 | - verdict >> NF_VERDICT_QBITS); | |
1359 | + verdict >> NF_VERDICT_QBITS, | |
1360 | + verdict & NF_VERDICT_MASK); | |
1361 | if (err < 0) { | |
1362 | if (err == -ECANCELED) | |
1363 | goto next_hook; | |
1364 | diff -uNr linux-3.2/net/netfilter/Kconfig linux-3.2-imq/net/netfilter/Kconfig | |
1365 | --- linux-3.2/net/netfilter/Kconfig 2011-10-24 10:10:05.000000000 +0300 | |
1366 | +++ linux-3.2-imq/net/netfilter/Kconfig 2011-11-04 11:12:52.123057315 +0200 | |
1367 | @@ -506,6 +506,18 @@ | |
1368 | For more information on the LEDs available on your system, see | |
1369 | Documentation/leds/leds-class.txt | |
1370 | ||
1371 | +config NETFILTER_XT_TARGET_IMQ | |
1372 | + tristate '"IMQ" target support' | |
1373 | + depends on NETFILTER_XTABLES | |
1374 | + depends on IP_NF_MANGLE || IP6_NF_MANGLE | |
1375 | + select IMQ | |
1376 | + default m if NETFILTER_ADVANCED=n | |
1377 | + help | |
1378 | + This option adds a `IMQ' target which is used to specify if and | |
1379 | + to which imq device packets should get enqueued/dequeued. | |
1380 | + | |
1381 | + To compile it as a module, choose M here. If unsure, say N. | |
1382 | + | |
1383 | config NETFILTER_XT_TARGET_MARK | |
1384 | tristate '"MARK" target support' | |
1385 | depends on NETFILTER_ADVANCED | |
1386 | diff -uNr linux-3.2/net/netfilter/Makefile linux-3.2-imq/net/netfilter/Makefile | |
1387 | --- linux-3.2/net/netfilter/Makefile 2011-10-24 10:10:05.000000000 +0300 | |
1388 | +++ linux-3.2-imq/net/netfilter/Makefile 2011-11-04 11:12:52.123057315 +0200 | |
1389 | @@ -56,6 +56,7 @@ | |
1390 | obj-$(CONFIG_NETFILTER_XT_TARGET_CT) += xt_CT.o | |
1391 | obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o | |
1392 | obj-$(CONFIG_NETFILTER_XT_TARGET_HL) += xt_HL.o | |
1393 | +obj-$(CONFIG_NETFILTER_XT_TARGET_IMQ) += xt_IMQ.o | |
1394 | obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o | |
1395 | obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o | |
1396 | obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o | |
1397 | diff -uNr linux-3.2/net/netfilter/nf_internals.h linux-3.2-imq/net/netfilter/nf_internals.h | |
1398 | --- linux-3.2/net/netfilter/nf_internals.h 2011-10-24 10:10:05.000000000 +0300 | |
1399 | +++ linux-3.2-imq/net/netfilter/nf_internals.h 2011-11-04 11:12:52.123057315 +0200 | |
1400 | @@ -29,7 +29,7 @@ | |
1401 | struct net_device *indev, | |
1402 | struct net_device *outdev, | |
1403 | int (*okfn)(struct sk_buff *), | |
1404 | - unsigned int queuenum); | |
1405 | + unsigned int queuenum, unsigned int queuetype); | |
1406 | extern int __init netfilter_queue_init(void); | |
1407 | ||
1408 | /* nf_log.c */ | |
1409 | diff -uNr linux-3.2/net/netfilter/nf_queue.c linux-3.2-imq/net/netfilter/nf_queue.c | |
1410 | --- linux-3.2/net/netfilter/nf_queue.c 2011-10-24 10:10:05.000000000 +0300 | |
1411 | +++ linux-3.2-imq/net/netfilter/nf_queue.c 2011-11-04 11:12:52.123057315 +0200 | |
1412 | @@ -22,6 +22,26 @@ | |
1413 | ||
1414 | static DEFINE_MUTEX(queue_handler_mutex); | |
1415 | ||
1416 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1417 | +static const struct nf_queue_handler *queue_imq_handler; | |
1418 | + | |
1419 | +void nf_register_queue_imq_handler(const struct nf_queue_handler *qh) | |
1420 | +{ | |
1421 | + mutex_lock(&queue_handler_mutex); | |
1422 | + rcu_assign_pointer(queue_imq_handler, qh); | |
1423 | + mutex_unlock(&queue_handler_mutex); | |
1424 | +} | |
1425 | +EXPORT_SYMBOL_GPL(nf_register_queue_imq_handler); | |
1426 | + | |
1427 | +void nf_unregister_queue_imq_handler(void) | |
1428 | +{ | |
1429 | + mutex_lock(&queue_handler_mutex); | |
1430 | + rcu_assign_pointer(queue_imq_handler, NULL); | |
1431 | + mutex_unlock(&queue_handler_mutex); | |
1432 | +} | |
1433 | +EXPORT_SYMBOL_GPL(nf_unregister_queue_imq_handler); | |
1434 | +#endif | |
1435 | + | |
1436 | /* return EBUSY when somebody else is registered, return EEXIST if the | |
1437 | * same handler is registered, return 0 in case of success. */ | |
1438 | int nf_register_queue_handler(u_int8_t pf, const struct nf_queue_handler *qh) | |
1439 | @@ -92,7 +112,7 @@ | |
1440 | } | |
1441 | EXPORT_SYMBOL_GPL(nf_unregister_queue_handlers); | |
1442 | ||
1443 | -static void nf_queue_entry_release_refs(struct nf_queue_entry *entry) | |
1444 | +void nf_queue_entry_release_refs(struct nf_queue_entry *entry) | |
1445 | { | |
1446 | /* Release those devices we held, or Alexey will kill me. */ | |
1447 | if (entry->indev) | |
1448 | @@ -112,6 +132,7 @@ | |
1449 | /* Drop reference to owner of hook which queued us. */ | |
1450 | module_put(entry->elem->owner); | |
1451 | } | |
1452 | +EXPORT_SYMBOL_GPL(nf_queue_entry_release_refs); | |
1453 | ||
1454 | /* | |
1455 | * Any packet that leaves via this function must come back | |
1456 | @@ -123,7 +144,8 @@ | |
1457 | struct net_device *indev, | |
1458 | struct net_device *outdev, | |
1459 | int (*okfn)(struct sk_buff *), | |
1460 | - unsigned int queuenum) | |
1461 | + unsigned int queuenum, | |
1462 | + unsigned int queuetype) | |
1463 | { | |
1464 | int status = -ENOENT; | |
1465 | struct nf_queue_entry *entry = NULL; | |
1466 | @@ -137,7 +159,17 @@ | |
1467 | /* QUEUE == DROP if no one is waiting, to be safe. */ | |
1468 | rcu_read_lock(); | |
1469 | ||
1470 | - qh = rcu_dereference(queue_handler[pf]); | |
1471 | + if (queuetype == NF_IMQ_QUEUE) { | |
1472 | +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) | |
1473 | + qh = rcu_dereference(queue_imq_handler); | |
1474 | +#else | |
1475 | + BUG(); | |
1476 | + goto err_unlock; | |
1477 | +#endif | |
1478 | + } else { | |
1479 | + qh = rcu_dereference(queue_handler[pf]); | |
1480 | + } | |
1481 | + | |
1482 | if (!qh) { | |
1483 | status = -ESRCH; | |
1484 | goto err_unlock; | |
1485 | @@ -209,7 +241,8 @@ | |
1486 | struct net_device *indev, | |
1487 | struct net_device *outdev, | |
1488 | int (*okfn)(struct sk_buff *), | |
1489 | - unsigned int queuenum) | |
1490 | + unsigned int queuenum, | |
1491 | + unsigned int queuetype) | |
1492 | { | |
1493 | struct sk_buff *segs; | |
1494 | int err; | |
1495 | @@ -217,7 +250,7 @@ | |
1496 | ||
1497 | if (!skb_is_gso(skb)) | |
1498 | return __nf_queue(skb, elem, pf, hook, indev, outdev, okfn, | |
1499 | - queuenum); | |
1500 | + queuenum, queuetype); | |
1501 | ||
1502 | switch (pf) { | |
1503 | case NFPROTO_IPV4: | |
1504 | @@ -244,7 +277,7 @@ | |
1505 | segs->next = NULL; | |
1506 | if (err == 0) | |
1507 | err = __nf_queue(segs, elem, pf, hook, indev, | |
1508 | - outdev, okfn, queuenum); | |
1509 | + outdev, okfn, queuenum, queuetype); | |
1510 | if (err == 0) | |
1511 | queued++; | |
1512 | else | |
1513 | @@ -299,9 +332,11 @@ | |
1514 | local_bh_enable(); | |
1515 | break; | |
1516 | case NF_QUEUE: | |
1517 | + case NF_IMQ_QUEUE: | |
1518 | err = __nf_queue(skb, elem, entry->pf, entry->hook, | |
1519 | entry->indev, entry->outdev, entry->okfn, | |
1520 | - verdict >> NF_VERDICT_QBITS); | |
1521 | + verdict >> NF_VERDICT_QBITS, | |
1522 | + verdict & NF_VERDICT_MASK); | |
1523 | if (err < 0) { | |
1524 | if (err == -ECANCELED) | |
1525 | goto next_hook; | |
1526 | diff -uNr linux-3.2/net/netfilter/xt_IMQ.c linux-3.2-imq/net/netfilter/xt_IMQ.c | |
1527 | --- linux-3.2/net/netfilter/xt_IMQ.c 1970-01-01 02:00:00.000000000 +0200 | |
1528 | +++ linux-3.2-imq/net/netfilter/xt_IMQ.c 2011-11-04 11:12:52.123057315 +0200 | |
1529 | @@ -0,0 +1,74 @@ | |
1530 | +/* | |
1531 | + * This target marks packets to be enqueued to an imq device | |
1532 | + */ | |
1533 | +#include <linux/module.h> | |
1534 | +#include <linux/skbuff.h> | |
1535 | +#include <linux/netfilter/x_tables.h> | |
1536 | +#include <linux/netfilter/xt_IMQ.h> | |
1537 | +#include <linux/imq.h> | |
1538 | + | |
1539 | +static unsigned int imq_target(struct sk_buff *pskb, | |
1540 | + const struct xt_action_param *par) | |
1541 | +{ | |
1542 | + const struct xt_imq_info *mr = par->targinfo; | |
1543 | + | |
1544 | + pskb->imq_flags = (mr->todev & IMQ_F_IFMASK) | IMQ_F_ENQUEUE; | |
1545 | + | |
1546 | + return XT_CONTINUE; | |
1547 | +} | |
1548 | + | |
1549 | +static int imq_checkentry(const struct xt_tgchk_param *par) | |
1550 | +{ | |
1551 | + struct xt_imq_info *mr = par->targinfo; | |
1552 | + | |
1553 | + if (mr->todev > IMQ_MAX_DEVS - 1) { | |
1554 | + printk(KERN_WARNING | |
1555 | + "IMQ: invalid device specified, highest is %u\n", | |
1556 | + IMQ_MAX_DEVS - 1); | |
1557 | + return -EINVAL; | |
1558 | + } | |
1559 | + | |
1560 | + return 0; | |
1561 | +} | |
1562 | + | |
1563 | +static struct xt_target xt_imq_reg[] __read_mostly = { | |
1564 | + { | |
1565 | + .name = "IMQ", | |
1566 | + .family = AF_INET, | |
1567 | + .checkentry = imq_checkentry, | |
1568 | + .target = imq_target, | |
1569 | + .targetsize = sizeof(struct xt_imq_info), | |
1570 | + .table = "mangle", | |
1571 | + .me = THIS_MODULE | |
1572 | + }, | |
1573 | + { | |
1574 | + .name = "IMQ", | |
1575 | + .family = AF_INET6, | |
1576 | + .checkentry = imq_checkentry, | |
1577 | + .target = imq_target, | |
1578 | + .targetsize = sizeof(struct xt_imq_info), | |
1579 | + .table = "mangle", | |
1580 | + .me = THIS_MODULE | |
1581 | + }, | |
1582 | +}; | |
1583 | + | |
1584 | +static int __init imq_init(void) | |
1585 | +{ | |
1586 | + return xt_register_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg)); | |
1587 | +} | |
1588 | + | |
1589 | +static void __exit imq_fini(void) | |
1590 | +{ | |
1591 | + xt_unregister_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg)); | |
1592 | +} | |
1593 | + | |
1594 | +module_init(imq_init); | |
1595 | +module_exit(imq_fini); | |
1596 | + | |
1597 | +MODULE_AUTHOR("http://www.linuximq.net"); | |
1598 | +MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. " | |
1599 | + "See http://www.linuximq.net/ for more information."); | |
1600 | +MODULE_LICENSE("GPL"); | |
1601 | +MODULE_ALIAS("ipt_IMQ"); | |
1602 | +MODULE_ALIAS("ip6t_IMQ"); | |
1603 | + |