Commit | Line | Data |
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7025fcd3 SH |
1 | /* |
2 | * Copyright (c) 2005 Voltaire Inc. All rights reserved. | |
3 | * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. | |
4 | * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. | |
5 | * Copyright (c) 2005 Intel Corporation. All rights reserved. | |
6 | * | |
a9474917 SH |
7 | * This software is available to you under a choice of one of two |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
7025fcd3 | 12 | * |
a9474917 SH |
13 | * Redistribution and use in source and binary forms, with or |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
7025fcd3 | 16 | * |
a9474917 SH |
17 | * - Redistributions of source code must retain the above |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
7025fcd3 | 20 | * |
a9474917 SH |
21 | * - Redistributions in binary form must reproduce the above |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
7025fcd3 | 25 | * |
a9474917 SH |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
7025fcd3 SH |
34 | */ |
35 | ||
36 | #include <linux/mutex.h> | |
37 | #include <linux/inetdevice.h> | |
38 | #include <linux/workqueue.h> | |
39 | #include <linux/if_arp.h> | |
40 | #include <net/arp.h> | |
41 | #include <net/neighbour.h> | |
42 | #include <net/route.h> | |
e795d092 | 43 | #include <net/netevent.h> |
38617c64 AS |
44 | #include <net/addrconf.h> |
45 | #include <net/ip6_route.h> | |
7025fcd3 SH |
46 | #include <rdma/ib_addr.h> |
47 | ||
48 | MODULE_AUTHOR("Sean Hefty"); | |
49 | MODULE_DESCRIPTION("IB Address Translation"); | |
50 | MODULE_LICENSE("Dual BSD/GPL"); | |
51 | ||
52 | struct addr_req { | |
53 | struct list_head list; | |
38617c64 AS |
54 | struct sockaddr_storage src_addr; |
55 | struct sockaddr_storage dst_addr; | |
7025fcd3 | 56 | struct rdma_dev_addr *addr; |
7a118df3 | 57 | struct rdma_addr_client *client; |
7025fcd3 SH |
58 | void *context; |
59 | void (*callback)(int status, struct sockaddr *src_addr, | |
60 | struct rdma_dev_addr *addr, void *context); | |
61 | unsigned long timeout; | |
62 | int status; | |
63 | }; | |
64 | ||
c4028958 | 65 | static void process_req(struct work_struct *work); |
7025fcd3 SH |
66 | |
67 | static DEFINE_MUTEX(lock); | |
68 | static LIST_HEAD(req_list); | |
c4028958 | 69 | static DECLARE_DELAYED_WORK(work, process_req); |
7025fcd3 SH |
70 | static struct workqueue_struct *addr_wq; |
71 | ||
7a118df3 SH |
72 | void rdma_addr_register_client(struct rdma_addr_client *client) |
73 | { | |
74 | atomic_set(&client->refcount, 1); | |
75 | init_completion(&client->comp); | |
76 | } | |
77 | EXPORT_SYMBOL(rdma_addr_register_client); | |
78 | ||
79 | static inline void put_client(struct rdma_addr_client *client) | |
80 | { | |
81 | if (atomic_dec_and_test(&client->refcount)) | |
82 | complete(&client->comp); | |
83 | } | |
84 | ||
85 | void rdma_addr_unregister_client(struct rdma_addr_client *client) | |
86 | { | |
87 | put_client(client); | |
88 | wait_for_completion(&client->comp); | |
89 | } | |
90 | EXPORT_SYMBOL(rdma_addr_unregister_client); | |
91 | ||
07ebafba TT |
92 | int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, |
93 | const unsigned char *dst_dev_addr) | |
7025fcd3 SH |
94 | { |
95 | switch (dev->type) { | |
96 | case ARPHRD_INFINIBAND: | |
07ebafba TT |
97 | dev_addr->dev_type = RDMA_NODE_IB_CA; |
98 | break; | |
99 | case ARPHRD_ETHER: | |
100 | dev_addr->dev_type = RDMA_NODE_RNIC; | |
7025fcd3 SH |
101 | break; |
102 | default: | |
103 | return -EADDRNOTAVAIL; | |
104 | } | |
105 | ||
106 | memcpy(dev_addr->src_dev_addr, dev->dev_addr, MAX_ADDR_LEN); | |
107 | memcpy(dev_addr->broadcast, dev->broadcast, MAX_ADDR_LEN); | |
108 | if (dst_dev_addr) | |
109 | memcpy(dev_addr->dst_dev_addr, dst_dev_addr, MAX_ADDR_LEN); | |
64c5e613 | 110 | dev_addr->src_dev = dev; |
7025fcd3 SH |
111 | return 0; |
112 | } | |
07ebafba | 113 | EXPORT_SYMBOL(rdma_copy_addr); |
7025fcd3 SH |
114 | |
115 | int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr) | |
116 | { | |
117 | struct net_device *dev; | |
38617c64 | 118 | int ret = -EADDRNOTAVAIL; |
7025fcd3 | 119 | |
38617c64 AS |
120 | switch (addr->sa_family) { |
121 | case AF_INET: | |
122 | dev = ip_dev_find(&init_net, | |
123 | ((struct sockaddr_in *) addr)->sin_addr.s_addr); | |
124 | ||
125 | if (!dev) | |
126 | return ret; | |
7025fcd3 | 127 | |
38617c64 AS |
128 | ret = rdma_copy_addr(dev_addr, dev, NULL); |
129 | dev_put(dev); | |
130 | break; | |
2c4ab624 RD |
131 | |
132 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
38617c64 AS |
133 | case AF_INET6: |
134 | for_each_netdev(&init_net, dev) { | |
135 | if (ipv6_chk_addr(&init_net, | |
136 | &((struct sockaddr_in6 *) addr)->sin6_addr, | |
137 | dev, 1)) { | |
138 | ret = rdma_copy_addr(dev_addr, dev, NULL); | |
139 | break; | |
140 | } | |
141 | } | |
142 | break; | |
2c4ab624 | 143 | #endif |
38617c64 | 144 | } |
7025fcd3 SH |
145 | return ret; |
146 | } | |
147 | EXPORT_SYMBOL(rdma_translate_ip); | |
148 | ||
149 | static void set_timeout(unsigned long time) | |
150 | { | |
151 | unsigned long delay; | |
152 | ||
153 | cancel_delayed_work(&work); | |
154 | ||
155 | delay = time - jiffies; | |
156 | if ((long)delay <= 0) | |
157 | delay = 1; | |
158 | ||
159 | queue_delayed_work(addr_wq, &work, delay); | |
160 | } | |
161 | ||
162 | static void queue_req(struct addr_req *req) | |
163 | { | |
164 | struct addr_req *temp_req; | |
165 | ||
166 | mutex_lock(&lock); | |
167 | list_for_each_entry_reverse(temp_req, &req_list, list) { | |
f115db48 | 168 | if (time_after_eq(req->timeout, temp_req->timeout)) |
7025fcd3 SH |
169 | break; |
170 | } | |
171 | ||
172 | list_add(&req->list, &temp_req->list); | |
173 | ||
174 | if (req_list.next == &req->list) | |
175 | set_timeout(req->timeout); | |
176 | mutex_unlock(&lock); | |
177 | } | |
178 | ||
38617c64 | 179 | static void addr_send_arp(struct sockaddr *dst_in) |
7025fcd3 SH |
180 | { |
181 | struct rtable *rt; | |
182 | struct flowi fl; | |
7025fcd3 SH |
183 | |
184 | memset(&fl, 0, sizeof fl); | |
2c4ab624 RD |
185 | |
186 | switch (dst_in->sa_family) { | |
187 | case AF_INET: | |
38617c64 AS |
188 | fl.nl_u.ip4_u.daddr = |
189 | ((struct sockaddr_in *) dst_in)->sin_addr.s_addr; | |
7025fcd3 | 190 | |
38617c64 AS |
191 | if (ip_route_output_key(&init_net, &rt, &fl)) |
192 | return; | |
193 | ||
194 | neigh_event_send(rt->u.dst.neighbour, NULL); | |
195 | ip_rt_put(rt); | |
2c4ab624 RD |
196 | break; |
197 | ||
198 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
199 | case AF_INET6: | |
200 | { | |
201 | struct dst_entry *dst; | |
38617c64 | 202 | |
38617c64 AS |
203 | fl.nl_u.ip6_u.daddr = |
204 | ((struct sockaddr_in6 *) dst_in)->sin6_addr; | |
205 | ||
206 | dst = ip6_route_output(&init_net, NULL, &fl); | |
207 | if (!dst) | |
208 | return; | |
209 | ||
210 | neigh_event_send(dst->neighbour, NULL); | |
211 | dst_release(dst); | |
2c4ab624 RD |
212 | break; |
213 | } | |
214 | #endif | |
38617c64 | 215 | } |
7025fcd3 SH |
216 | } |
217 | ||
38617c64 | 218 | static int addr4_resolve_remote(struct sockaddr_in *src_in, |
7025fcd3 SH |
219 | struct sockaddr_in *dst_in, |
220 | struct rdma_dev_addr *addr) | |
221 | { | |
1b90c137 AV |
222 | __be32 src_ip = src_in->sin_addr.s_addr; |
223 | __be32 dst_ip = dst_in->sin_addr.s_addr; | |
7025fcd3 SH |
224 | struct flowi fl; |
225 | struct rtable *rt; | |
226 | struct neighbour *neigh; | |
227 | int ret; | |
228 | ||
229 | memset(&fl, 0, sizeof fl); | |
230 | fl.nl_u.ip4_u.daddr = dst_ip; | |
231 | fl.nl_u.ip4_u.saddr = src_ip; | |
f206351a | 232 | ret = ip_route_output_key(&init_net, &rt, &fl); |
7025fcd3 SH |
233 | if (ret) |
234 | goto out; | |
235 | ||
236 | /* If the device does ARP internally, return 'done' */ | |
237 | if (rt->idev->dev->flags & IFF_NOARP) { | |
07ebafba | 238 | rdma_copy_addr(addr, rt->idev->dev, NULL); |
7025fcd3 SH |
239 | goto put; |
240 | } | |
241 | ||
242 | neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, rt->idev->dev); | |
243 | if (!neigh) { | |
244 | ret = -ENODATA; | |
245 | goto put; | |
246 | } | |
247 | ||
248 | if (!(neigh->nud_state & NUD_VALID)) { | |
249 | ret = -ENODATA; | |
250 | goto release; | |
251 | } | |
252 | ||
253 | if (!src_ip) { | |
254 | src_in->sin_family = dst_in->sin_family; | |
255 | src_in->sin_addr.s_addr = rt->rt_src; | |
256 | } | |
257 | ||
07ebafba | 258 | ret = rdma_copy_addr(addr, neigh->dev, neigh->ha); |
7025fcd3 SH |
259 | release: |
260 | neigh_release(neigh); | |
261 | put: | |
262 | ip_rt_put(rt); | |
263 | out: | |
264 | return ret; | |
265 | } | |
266 | ||
2c4ab624 | 267 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
38617c64 AS |
268 | static int addr6_resolve_remote(struct sockaddr_in6 *src_in, |
269 | struct sockaddr_in6 *dst_in, | |
270 | struct rdma_dev_addr *addr) | |
271 | { | |
272 | struct flowi fl; | |
273 | struct neighbour *neigh; | |
274 | struct dst_entry *dst; | |
275 | int ret = -ENODATA; | |
276 | ||
277 | memset(&fl, 0, sizeof fl); | |
278 | fl.nl_u.ip6_u.daddr = dst_in->sin6_addr; | |
279 | fl.nl_u.ip6_u.saddr = src_in->sin6_addr; | |
280 | ||
281 | dst = ip6_route_output(&init_net, NULL, &fl); | |
282 | if (!dst) | |
283 | return ret; | |
284 | ||
285 | if (dst->dev->flags & IFF_NOARP) { | |
286 | ret = rdma_copy_addr(addr, dst->dev, NULL); | |
287 | } else { | |
288 | neigh = dst->neighbour; | |
289 | if (neigh && (neigh->nud_state & NUD_VALID)) | |
290 | ret = rdma_copy_addr(addr, neigh->dev, neigh->ha); | |
291 | } | |
292 | ||
293 | dst_release(dst); | |
294 | return ret; | |
295 | } | |
2c4ab624 RD |
296 | #else |
297 | static int addr6_resolve_remote(struct sockaddr_in6 *src_in, | |
298 | struct sockaddr_in6 *dst_in, | |
299 | struct rdma_dev_addr *addr) | |
300 | { | |
301 | return -EADDRNOTAVAIL; | |
302 | } | |
303 | #endif | |
38617c64 AS |
304 | |
305 | static int addr_resolve_remote(struct sockaddr *src_in, | |
306 | struct sockaddr *dst_in, | |
307 | struct rdma_dev_addr *addr) | |
308 | { | |
309 | if (src_in->sa_family == AF_INET) { | |
310 | return addr4_resolve_remote((struct sockaddr_in *) src_in, | |
311 | (struct sockaddr_in *) dst_in, addr); | |
312 | } else | |
313 | return addr6_resolve_remote((struct sockaddr_in6 *) src_in, | |
314 | (struct sockaddr_in6 *) dst_in, addr); | |
315 | } | |
316 | ||
c4028958 | 317 | static void process_req(struct work_struct *work) |
7025fcd3 SH |
318 | { |
319 | struct addr_req *req, *temp_req; | |
38617c64 | 320 | struct sockaddr *src_in, *dst_in; |
7025fcd3 SH |
321 | struct list_head done_list; |
322 | ||
323 | INIT_LIST_HEAD(&done_list); | |
324 | ||
325 | mutex_lock(&lock); | |
326 | list_for_each_entry_safe(req, temp_req, &req_list, list) { | |
c78bb844 | 327 | if (req->status == -ENODATA) { |
38617c64 AS |
328 | src_in = (struct sockaddr *) &req->src_addr; |
329 | dst_in = (struct sockaddr *) &req->dst_addr; | |
7025fcd3 SH |
330 | req->status = addr_resolve_remote(src_in, dst_in, |
331 | req->addr); | |
c78bb844 KK |
332 | if (req->status && time_after_eq(jiffies, req->timeout)) |
333 | req->status = -ETIMEDOUT; | |
334 | else if (req->status == -ENODATA) | |
335 | continue; | |
7025fcd3 | 336 | } |
04699a1f | 337 | list_move_tail(&req->list, &done_list); |
7025fcd3 SH |
338 | } |
339 | ||
340 | if (!list_empty(&req_list)) { | |
341 | req = list_entry(req_list.next, struct addr_req, list); | |
342 | set_timeout(req->timeout); | |
343 | } | |
344 | mutex_unlock(&lock); | |
345 | ||
346 | list_for_each_entry_safe(req, temp_req, &done_list, list) { | |
347 | list_del(&req->list); | |
38617c64 AS |
348 | req->callback(req->status, (struct sockaddr *) &req->src_addr, |
349 | req->addr, req->context); | |
7a118df3 | 350 | put_client(req->client); |
7025fcd3 SH |
351 | kfree(req); |
352 | } | |
353 | } | |
354 | ||
38617c64 AS |
355 | static int addr_resolve_local(struct sockaddr *src_in, |
356 | struct sockaddr *dst_in, | |
7025fcd3 SH |
357 | struct rdma_dev_addr *addr) |
358 | { | |
359 | struct net_device *dev; | |
7025fcd3 SH |
360 | int ret; |
361 | ||
2c4ab624 RD |
362 | switch (dst_in->sa_family) { |
363 | case AF_INET: | |
364 | { | |
38617c64 AS |
365 | __be32 src_ip = ((struct sockaddr_in *) src_in)->sin_addr.s_addr; |
366 | __be32 dst_ip = ((struct sockaddr_in *) dst_in)->sin_addr.s_addr; | |
367 | ||
368 | dev = ip_dev_find(&init_net, dst_ip); | |
369 | if (!dev) | |
370 | return -EADDRNOTAVAIL; | |
371 | ||
372 | if (ipv4_is_zeronet(src_ip)) { | |
373 | src_in->sa_family = dst_in->sa_family; | |
374 | ((struct sockaddr_in *) src_in)->sin_addr.s_addr = dst_ip; | |
375 | ret = rdma_copy_addr(addr, dev, dev->dev_addr); | |
376 | } else if (ipv4_is_loopback(src_ip)) { | |
377 | ret = rdma_translate_ip(dst_in, addr); | |
378 | if (!ret) | |
379 | memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN); | |
380 | } else { | |
381 | ret = rdma_translate_ip(src_in, addr); | |
382 | if (!ret) | |
383 | memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN); | |
384 | } | |
385 | dev_put(dev); | |
2c4ab624 RD |
386 | break; |
387 | } | |
388 | ||
389 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
390 | case AF_INET6: | |
391 | { | |
38617c64 AS |
392 | struct in6_addr *a; |
393 | ||
394 | for_each_netdev(&init_net, dev) | |
395 | if (ipv6_chk_addr(&init_net, | |
396 | &((struct sockaddr_in6 *) addr)->sin6_addr, | |
397 | dev, 1)) | |
398 | break; | |
399 | ||
400 | if (!dev) | |
401 | return -EADDRNOTAVAIL; | |
402 | ||
403 | a = &((struct sockaddr_in6 *) src_in)->sin6_addr; | |
404 | ||
405 | if (ipv6_addr_any(a)) { | |
406 | src_in->sa_family = dst_in->sa_family; | |
407 | ((struct sockaddr_in6 *) src_in)->sin6_addr = | |
408 | ((struct sockaddr_in6 *) dst_in)->sin6_addr; | |
409 | ret = rdma_copy_addr(addr, dev, dev->dev_addr); | |
410 | } else if (ipv6_addr_loopback(a)) { | |
411 | ret = rdma_translate_ip(dst_in, addr); | |
412 | if (!ret) | |
413 | memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN); | |
414 | } else { | |
415 | ret = rdma_translate_ip(src_in, addr); | |
416 | if (!ret) | |
417 | memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN); | |
418 | } | |
2c4ab624 RD |
419 | break; |
420 | } | |
421 | #endif | |
422 | ||
423 | default: | |
424 | ret = -EADDRNOTAVAIL; | |
425 | break; | |
7025fcd3 SH |
426 | } |
427 | ||
7025fcd3 SH |
428 | return ret; |
429 | } | |
430 | ||
7a118df3 SH |
431 | int rdma_resolve_ip(struct rdma_addr_client *client, |
432 | struct sockaddr *src_addr, struct sockaddr *dst_addr, | |
7025fcd3 SH |
433 | struct rdma_dev_addr *addr, int timeout_ms, |
434 | void (*callback)(int status, struct sockaddr *src_addr, | |
435 | struct rdma_dev_addr *addr, void *context), | |
436 | void *context) | |
437 | { | |
38617c64 | 438 | struct sockaddr *src_in, *dst_in; |
7025fcd3 SH |
439 | struct addr_req *req; |
440 | int ret = 0; | |
441 | ||
dd00cc48 | 442 | req = kzalloc(sizeof *req, GFP_KERNEL); |
7025fcd3 SH |
443 | if (!req) |
444 | return -ENOMEM; | |
7025fcd3 SH |
445 | |
446 | if (src_addr) | |
447 | memcpy(&req->src_addr, src_addr, ip_addr_size(src_addr)); | |
448 | memcpy(&req->dst_addr, dst_addr, ip_addr_size(dst_addr)); | |
449 | req->addr = addr; | |
450 | req->callback = callback; | |
451 | req->context = context; | |
7a118df3 SH |
452 | req->client = client; |
453 | atomic_inc(&client->refcount); | |
7025fcd3 | 454 | |
38617c64 AS |
455 | src_in = (struct sockaddr *) &req->src_addr; |
456 | dst_in = (struct sockaddr *) &req->dst_addr; | |
7025fcd3 SH |
457 | |
458 | req->status = addr_resolve_local(src_in, dst_in, addr); | |
459 | if (req->status == -EADDRNOTAVAIL) | |
460 | req->status = addr_resolve_remote(src_in, dst_in, addr); | |
461 | ||
462 | switch (req->status) { | |
463 | case 0: | |
464 | req->timeout = jiffies; | |
465 | queue_req(req); | |
466 | break; | |
467 | case -ENODATA: | |
468 | req->timeout = msecs_to_jiffies(timeout_ms) + jiffies; | |
469 | queue_req(req); | |
470 | addr_send_arp(dst_in); | |
471 | break; | |
472 | default: | |
473 | ret = req->status; | |
7a118df3 | 474 | atomic_dec(&client->refcount); |
7025fcd3 SH |
475 | kfree(req); |
476 | break; | |
477 | } | |
478 | return ret; | |
479 | } | |
480 | EXPORT_SYMBOL(rdma_resolve_ip); | |
481 | ||
482 | void rdma_addr_cancel(struct rdma_dev_addr *addr) | |
483 | { | |
484 | struct addr_req *req, *temp_req; | |
485 | ||
486 | mutex_lock(&lock); | |
487 | list_for_each_entry_safe(req, temp_req, &req_list, list) { | |
488 | if (req->addr == addr) { | |
489 | req->status = -ECANCELED; | |
490 | req->timeout = jiffies; | |
04699a1f | 491 | list_move(&req->list, &req_list); |
7025fcd3 SH |
492 | set_timeout(req->timeout); |
493 | break; | |
494 | } | |
495 | } | |
496 | mutex_unlock(&lock); | |
497 | } | |
498 | EXPORT_SYMBOL(rdma_addr_cancel); | |
499 | ||
3cd96564 | 500 | static int netevent_callback(struct notifier_block *self, unsigned long event, |
e795d092 | 501 | void *ctx) |
7025fcd3 | 502 | { |
3cd96564 | 503 | if (event == NETEVENT_NEIGH_UPDATE) { |
e795d092 | 504 | struct neighbour *neigh = ctx; |
7025fcd3 | 505 | |
1f126670 | 506 | if (neigh->nud_state & NUD_VALID) { |
e795d092 TT |
507 | set_timeout(jiffies); |
508 | } | |
509 | } | |
7025fcd3 SH |
510 | return 0; |
511 | } | |
512 | ||
e795d092 TT |
513 | static struct notifier_block nb = { |
514 | .notifier_call = netevent_callback | |
7025fcd3 SH |
515 | }; |
516 | ||
517 | static int addr_init(void) | |
518 | { | |
c7f743a6 | 519 | addr_wq = create_singlethread_workqueue("ib_addr"); |
7025fcd3 SH |
520 | if (!addr_wq) |
521 | return -ENOMEM; | |
522 | ||
e795d092 | 523 | register_netevent_notifier(&nb); |
7025fcd3 SH |
524 | return 0; |
525 | } | |
526 | ||
527 | static void addr_cleanup(void) | |
528 | { | |
e795d092 | 529 | unregister_netevent_notifier(&nb); |
7025fcd3 SH |
530 | destroy_workqueue(addr_wq); |
531 | } | |
532 | ||
533 | module_init(addr_init); | |
534 | module_exit(addr_cleanup); |