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> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
7025fcd3 | 39 | #include <linux/workqueue.h> |
e4dd23d7 | 40 | #include <linux/module.h> |
7025fcd3 SH |
41 | #include <net/arp.h> |
42 | #include <net/neighbour.h> | |
43 | #include <net/route.h> | |
e795d092 | 44 | #include <net/netevent.h> |
38617c64 AS |
45 | #include <net/addrconf.h> |
46 | #include <net/ip6_route.h> | |
7025fcd3 | 47 | #include <rdma/ib_addr.h> |
ef560861 | 48 | #include <rdma/ib.h> |
7025fcd3 SH |
49 | |
50 | MODULE_AUTHOR("Sean Hefty"); | |
51 | MODULE_DESCRIPTION("IB Address Translation"); | |
52 | MODULE_LICENSE("Dual BSD/GPL"); | |
53 | ||
54 | struct addr_req { | |
55 | struct list_head list; | |
38617c64 AS |
56 | struct sockaddr_storage src_addr; |
57 | struct sockaddr_storage dst_addr; | |
7025fcd3 | 58 | struct rdma_dev_addr *addr; |
7a118df3 | 59 | struct rdma_addr_client *client; |
7025fcd3 SH |
60 | void *context; |
61 | void (*callback)(int status, struct sockaddr *src_addr, | |
62 | struct rdma_dev_addr *addr, void *context); | |
63 | unsigned long timeout; | |
64 | int status; | |
65 | }; | |
66 | ||
c4028958 | 67 | static void process_req(struct work_struct *work); |
7025fcd3 SH |
68 | |
69 | static DEFINE_MUTEX(lock); | |
70 | static LIST_HEAD(req_list); | |
c4028958 | 71 | static DECLARE_DELAYED_WORK(work, process_req); |
7025fcd3 SH |
72 | static struct workqueue_struct *addr_wq; |
73 | ||
ef560861 SH |
74 | int rdma_addr_size(struct sockaddr *addr) |
75 | { | |
76 | switch (addr->sa_family) { | |
77 | case AF_INET: | |
78 | return sizeof(struct sockaddr_in); | |
79 | case AF_INET6: | |
80 | return sizeof(struct sockaddr_in6); | |
81 | case AF_IB: | |
82 | return sizeof(struct sockaddr_ib); | |
83 | default: | |
84 | return 0; | |
85 | } | |
86 | } | |
87 | EXPORT_SYMBOL(rdma_addr_size); | |
88 | ||
dd5f03be MB |
89 | static struct rdma_addr_client self; |
90 | ||
7a118df3 SH |
91 | void rdma_addr_register_client(struct rdma_addr_client *client) |
92 | { | |
93 | atomic_set(&client->refcount, 1); | |
94 | init_completion(&client->comp); | |
95 | } | |
96 | EXPORT_SYMBOL(rdma_addr_register_client); | |
97 | ||
98 | static inline void put_client(struct rdma_addr_client *client) | |
99 | { | |
100 | if (atomic_dec_and_test(&client->refcount)) | |
101 | complete(&client->comp); | |
102 | } | |
103 | ||
104 | void rdma_addr_unregister_client(struct rdma_addr_client *client) | |
105 | { | |
106 | put_client(client); | |
107 | wait_for_completion(&client->comp); | |
108 | } | |
109 | EXPORT_SYMBOL(rdma_addr_unregister_client); | |
110 | ||
07ebafba TT |
111 | int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, |
112 | const unsigned char *dst_dev_addr) | |
7025fcd3 | 113 | { |
c4315d85 | 114 | dev_addr->dev_type = dev->type; |
7025fcd3 SH |
115 | memcpy(dev_addr->src_dev_addr, dev->dev_addr, MAX_ADDR_LEN); |
116 | memcpy(dev_addr->broadcast, dev->broadcast, MAX_ADDR_LEN); | |
117 | if (dst_dev_addr) | |
118 | memcpy(dev_addr->dst_dev_addr, dst_dev_addr, MAX_ADDR_LEN); | |
6266ed6e | 119 | dev_addr->bound_dev_if = dev->ifindex; |
7025fcd3 SH |
120 | return 0; |
121 | } | |
07ebafba | 122 | EXPORT_SYMBOL(rdma_copy_addr); |
7025fcd3 | 123 | |
dd5f03be MB |
124 | int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr, |
125 | u16 *vlan_id) | |
7025fcd3 SH |
126 | { |
127 | struct net_device *dev; | |
38617c64 | 128 | int ret = -EADDRNOTAVAIL; |
7025fcd3 | 129 | |
6266ed6e | 130 | if (dev_addr->bound_dev_if) { |
565edd1d | 131 | dev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if); |
6266ed6e SH |
132 | if (!dev) |
133 | return -ENODEV; | |
134 | ret = rdma_copy_addr(dev_addr, dev, NULL); | |
135 | dev_put(dev); | |
136 | return ret; | |
137 | } | |
138 | ||
38617c64 AS |
139 | switch (addr->sa_family) { |
140 | case AF_INET: | |
565edd1d | 141 | dev = ip_dev_find(dev_addr->net, |
38617c64 AS |
142 | ((struct sockaddr_in *) addr)->sin_addr.s_addr); |
143 | ||
144 | if (!dev) | |
145 | return ret; | |
7025fcd3 | 146 | |
38617c64 | 147 | ret = rdma_copy_addr(dev_addr, dev, NULL); |
dd5f03be MB |
148 | if (vlan_id) |
149 | *vlan_id = rdma_vlan_dev_vlan_id(dev); | |
38617c64 AS |
150 | dev_put(dev); |
151 | break; | |
d90f9b35 | 152 | #if IS_ENABLED(CONFIG_IPV6) |
38617c64 | 153 | case AF_INET6: |
22f4fbd9 | 154 | rcu_read_lock(); |
565edd1d GS |
155 | for_each_netdev_rcu(dev_addr->net, dev) { |
156 | if (ipv6_chk_addr(dev_addr->net, | |
38617c64 AS |
157 | &((struct sockaddr_in6 *) addr)->sin6_addr, |
158 | dev, 1)) { | |
159 | ret = rdma_copy_addr(dev_addr, dev, NULL); | |
dd5f03be MB |
160 | if (vlan_id) |
161 | *vlan_id = rdma_vlan_dev_vlan_id(dev); | |
38617c64 AS |
162 | break; |
163 | } | |
164 | } | |
22f4fbd9 | 165 | rcu_read_unlock(); |
38617c64 | 166 | break; |
2c4ab624 | 167 | #endif |
38617c64 | 168 | } |
7025fcd3 SH |
169 | return ret; |
170 | } | |
171 | EXPORT_SYMBOL(rdma_translate_ip); | |
172 | ||
173 | static void set_timeout(unsigned long time) | |
174 | { | |
175 | unsigned long delay; | |
176 | ||
7025fcd3 | 177 | delay = time - jiffies; |
346f98b4 OK |
178 | if ((long)delay < 0) |
179 | delay = 0; | |
7025fcd3 | 180 | |
41f63c53 | 181 | mod_delayed_work(addr_wq, &work, delay); |
7025fcd3 SH |
182 | } |
183 | ||
184 | static void queue_req(struct addr_req *req) | |
185 | { | |
186 | struct addr_req *temp_req; | |
187 | ||
188 | mutex_lock(&lock); | |
189 | list_for_each_entry_reverse(temp_req, &req_list, list) { | |
f115db48 | 190 | if (time_after_eq(req->timeout, temp_req->timeout)) |
7025fcd3 SH |
191 | break; |
192 | } | |
193 | ||
194 | list_add(&req->list, &temp_req->list); | |
195 | ||
196 | if (req_list.next == &req->list) | |
197 | set_timeout(req->timeout); | |
198 | mutex_unlock(&lock); | |
199 | } | |
200 | ||
02b61955 | 201 | static int dst_fetch_ha(struct dst_entry *dst, struct rdma_dev_addr *dev_addr, void *daddr) |
51d45974 DM |
202 | { |
203 | struct neighbour *n; | |
204 | int ret; | |
205 | ||
02b61955 DM |
206 | n = dst_neigh_lookup(dst, daddr); |
207 | ||
51d45974 | 208 | rcu_read_lock(); |
51d45974 DM |
209 | if (!n || !(n->nud_state & NUD_VALID)) { |
210 | if (n) | |
211 | neigh_event_send(n, NULL); | |
212 | ret = -ENODATA; | |
213 | } else { | |
02b61955 | 214 | ret = rdma_copy_addr(dev_addr, dst->dev, n->ha); |
51d45974 DM |
215 | } |
216 | rcu_read_unlock(); | |
217 | ||
02b61955 DM |
218 | if (n) |
219 | neigh_release(n); | |
220 | ||
51d45974 DM |
221 | return ret; |
222 | } | |
223 | ||
923c100e SH |
224 | static int addr4_resolve(struct sockaddr_in *src_in, |
225 | struct sockaddr_in *dst_in, | |
226 | struct rdma_dev_addr *addr) | |
7025fcd3 | 227 | { |
1b90c137 AV |
228 | __be32 src_ip = src_in->sin_addr.s_addr; |
229 | __be32 dst_ip = dst_in->sin_addr.s_addr; | |
7025fcd3 | 230 | struct rtable *rt; |
5fc3590c | 231 | struct flowi4 fl4; |
7025fcd3 SH |
232 | int ret; |
233 | ||
5fc3590c DM |
234 | memset(&fl4, 0, sizeof(fl4)); |
235 | fl4.daddr = dst_ip; | |
236 | fl4.saddr = src_ip; | |
237 | fl4.flowi4_oif = addr->bound_dev_if; | |
565edd1d | 238 | rt = ip_route_output_key(addr->net, &fl4); |
b23dd4fe DM |
239 | if (IS_ERR(rt)) { |
240 | ret = PTR_ERR(rt); | |
7025fcd3 | 241 | goto out; |
b23dd4fe | 242 | } |
923c100e | 243 | src_in->sin_family = AF_INET; |
5fc3590c | 244 | src_in->sin_addr.s_addr = fl4.saddr; |
923c100e | 245 | |
72cdd1d9 | 246 | if (rt->dst.dev->flags & IFF_LOOPBACK) { |
dd5f03be | 247 | ret = rdma_translate_ip((struct sockaddr *)dst_in, addr, NULL); |
923c100e SH |
248 | if (!ret) |
249 | memcpy(addr->dst_dev_addr, addr->src_dev_addr, MAX_ADDR_LEN); | |
250 | goto put; | |
251 | } | |
252 | ||
7025fcd3 | 253 | /* If the device does ARP internally, return 'done' */ |
72cdd1d9 | 254 | if (rt->dst.dev->flags & IFF_NOARP) { |
1bdd6384 | 255 | ret = rdma_copy_addr(addr, rt->dst.dev, NULL); |
7025fcd3 SH |
256 | goto put; |
257 | } | |
258 | ||
02b61955 | 259 | ret = dst_fetch_ha(&rt->dst, addr, &fl4.daddr); |
7025fcd3 SH |
260 | put: |
261 | ip_rt_put(rt); | |
262 | out: | |
263 | return ret; | |
264 | } | |
265 | ||
d90f9b35 | 266 | #if IS_ENABLED(CONFIG_IPV6) |
d14714df SH |
267 | static int addr6_resolve(struct sockaddr_in6 *src_in, |
268 | struct sockaddr_in6 *dst_in, | |
269 | struct rdma_dev_addr *addr) | |
38617c64 | 270 | { |
4c9483b2 | 271 | struct flowi6 fl6; |
38617c64 | 272 | struct dst_entry *dst; |
d14714df | 273 | int ret; |
38617c64 | 274 | |
4c9483b2 | 275 | memset(&fl6, 0, sizeof fl6); |
4e3fd7a0 AD |
276 | fl6.daddr = dst_in->sin6_addr; |
277 | fl6.saddr = src_in->sin6_addr; | |
4c9483b2 | 278 | fl6.flowi6_oif = addr->bound_dev_if; |
38617c64 | 279 | |
565edd1d | 280 | dst = ip6_route_output(addr->net, NULL, &fl6); |
d14714df SH |
281 | if ((ret = dst->error)) |
282 | goto put; | |
283 | ||
4c9483b2 | 284 | if (ipv6_addr_any(&fl6.saddr)) { |
565edd1d | 285 | ret = ipv6_dev_get_saddr(addr->net, ip6_dst_idev(dst)->dev, |
4c9483b2 | 286 | &fl6.daddr, 0, &fl6.saddr); |
d14714df SH |
287 | if (ret) |
288 | goto put; | |
38617c64 | 289 | |
d14714df | 290 | src_in->sin6_family = AF_INET6; |
4e3fd7a0 | 291 | src_in->sin6_addr = fl6.saddr; |
d14714df SH |
292 | } |
293 | ||
294 | if (dst->dev->flags & IFF_LOOPBACK) { | |
dd5f03be | 295 | ret = rdma_translate_ip((struct sockaddr *)dst_in, addr, NULL); |
d14714df SH |
296 | if (!ret) |
297 | memcpy(addr->dst_dev_addr, addr->src_dev_addr, MAX_ADDR_LEN); | |
298 | goto put; | |
299 | } | |
300 | ||
301 | /* If the device does ARP internally, return 'done' */ | |
38617c64 AS |
302 | if (dst->dev->flags & IFF_NOARP) { |
303 | ret = rdma_copy_addr(addr, dst->dev, NULL); | |
d14714df | 304 | goto put; |
38617c64 AS |
305 | } |
306 | ||
02b61955 | 307 | ret = dst_fetch_ha(dst, addr, &fl6.daddr); |
d14714df | 308 | put: |
38617c64 AS |
309 | dst_release(dst); |
310 | return ret; | |
311 | } | |
2c4ab624 | 312 | #else |
d14714df SH |
313 | static int addr6_resolve(struct sockaddr_in6 *src_in, |
314 | struct sockaddr_in6 *dst_in, | |
315 | struct rdma_dev_addr *addr) | |
2c4ab624 RD |
316 | { |
317 | return -EADDRNOTAVAIL; | |
318 | } | |
319 | #endif | |
38617c64 | 320 | |
923c100e SH |
321 | static int addr_resolve(struct sockaddr *src_in, |
322 | struct sockaddr *dst_in, | |
323 | struct rdma_dev_addr *addr) | |
38617c64 AS |
324 | { |
325 | if (src_in->sa_family == AF_INET) { | |
923c100e | 326 | return addr4_resolve((struct sockaddr_in *) src_in, |
38617c64 AS |
327 | (struct sockaddr_in *) dst_in, addr); |
328 | } else | |
d14714df | 329 | return addr6_resolve((struct sockaddr_in6 *) src_in, |
38617c64 AS |
330 | (struct sockaddr_in6 *) dst_in, addr); |
331 | } | |
332 | ||
c4028958 | 333 | static void process_req(struct work_struct *work) |
7025fcd3 SH |
334 | { |
335 | struct addr_req *req, *temp_req; | |
38617c64 | 336 | struct sockaddr *src_in, *dst_in; |
7025fcd3 SH |
337 | struct list_head done_list; |
338 | ||
339 | INIT_LIST_HEAD(&done_list); | |
340 | ||
341 | mutex_lock(&lock); | |
342 | list_for_each_entry_safe(req, temp_req, &req_list, list) { | |
c78bb844 | 343 | if (req->status == -ENODATA) { |
38617c64 AS |
344 | src_in = (struct sockaddr *) &req->src_addr; |
345 | dst_in = (struct sockaddr *) &req->dst_addr; | |
923c100e | 346 | req->status = addr_resolve(src_in, dst_in, req->addr); |
c78bb844 KK |
347 | if (req->status && time_after_eq(jiffies, req->timeout)) |
348 | req->status = -ETIMEDOUT; | |
349 | else if (req->status == -ENODATA) | |
350 | continue; | |
7025fcd3 | 351 | } |
04699a1f | 352 | list_move_tail(&req->list, &done_list); |
7025fcd3 SH |
353 | } |
354 | ||
355 | if (!list_empty(&req_list)) { | |
356 | req = list_entry(req_list.next, struct addr_req, list); | |
357 | set_timeout(req->timeout); | |
358 | } | |
359 | mutex_unlock(&lock); | |
360 | ||
361 | list_for_each_entry_safe(req, temp_req, &done_list, list) { | |
362 | list_del(&req->list); | |
38617c64 AS |
363 | req->callback(req->status, (struct sockaddr *) &req->src_addr, |
364 | req->addr, req->context); | |
7a118df3 | 365 | put_client(req->client); |
7025fcd3 SH |
366 | kfree(req); |
367 | } | |
368 | } | |
369 | ||
7a118df3 SH |
370 | int rdma_resolve_ip(struct rdma_addr_client *client, |
371 | struct sockaddr *src_addr, struct sockaddr *dst_addr, | |
7025fcd3 SH |
372 | struct rdma_dev_addr *addr, int timeout_ms, |
373 | void (*callback)(int status, struct sockaddr *src_addr, | |
374 | struct rdma_dev_addr *addr, void *context), | |
375 | void *context) | |
376 | { | |
38617c64 | 377 | struct sockaddr *src_in, *dst_in; |
7025fcd3 SH |
378 | struct addr_req *req; |
379 | int ret = 0; | |
380 | ||
dd00cc48 | 381 | req = kzalloc(sizeof *req, GFP_KERNEL); |
7025fcd3 SH |
382 | if (!req) |
383 | return -ENOMEM; | |
7025fcd3 | 384 | |
d2e08862 SH |
385 | src_in = (struct sockaddr *) &req->src_addr; |
386 | dst_in = (struct sockaddr *) &req->dst_addr; | |
387 | ||
388 | if (src_addr) { | |
389 | if (src_addr->sa_family != dst_addr->sa_family) { | |
390 | ret = -EINVAL; | |
391 | goto err; | |
392 | } | |
393 | ||
ef560861 | 394 | memcpy(src_in, src_addr, rdma_addr_size(src_addr)); |
d2e08862 SH |
395 | } else { |
396 | src_in->sa_family = dst_addr->sa_family; | |
397 | } | |
398 | ||
ef560861 | 399 | memcpy(dst_in, dst_addr, rdma_addr_size(dst_addr)); |
7025fcd3 SH |
400 | req->addr = addr; |
401 | req->callback = callback; | |
402 | req->context = context; | |
7a118df3 SH |
403 | req->client = client; |
404 | atomic_inc(&client->refcount); | |
7025fcd3 | 405 | |
d14714df | 406 | req->status = addr_resolve(src_in, dst_in, addr); |
7025fcd3 SH |
407 | switch (req->status) { |
408 | case 0: | |
409 | req->timeout = jiffies; | |
410 | queue_req(req); | |
411 | break; | |
412 | case -ENODATA: | |
413 | req->timeout = msecs_to_jiffies(timeout_ms) + jiffies; | |
414 | queue_req(req); | |
7025fcd3 SH |
415 | break; |
416 | default: | |
417 | ret = req->status; | |
7a118df3 | 418 | atomic_dec(&client->refcount); |
d2e08862 | 419 | goto err; |
7025fcd3 SH |
420 | } |
421 | return ret; | |
d2e08862 SH |
422 | err: |
423 | kfree(req); | |
424 | return ret; | |
7025fcd3 SH |
425 | } |
426 | EXPORT_SYMBOL(rdma_resolve_ip); | |
427 | ||
428 | void rdma_addr_cancel(struct rdma_dev_addr *addr) | |
429 | { | |
430 | struct addr_req *req, *temp_req; | |
431 | ||
432 | mutex_lock(&lock); | |
433 | list_for_each_entry_safe(req, temp_req, &req_list, list) { | |
434 | if (req->addr == addr) { | |
435 | req->status = -ECANCELED; | |
436 | req->timeout = jiffies; | |
04699a1f | 437 | list_move(&req->list, &req_list); |
7025fcd3 SH |
438 | set_timeout(req->timeout); |
439 | break; | |
440 | } | |
441 | } | |
442 | mutex_unlock(&lock); | |
443 | } | |
444 | EXPORT_SYMBOL(rdma_addr_cancel); | |
445 | ||
dd5f03be MB |
446 | struct resolve_cb_context { |
447 | struct rdma_dev_addr *addr; | |
448 | struct completion comp; | |
449 | }; | |
450 | ||
451 | static void resolve_cb(int status, struct sockaddr *src_addr, | |
452 | struct rdma_dev_addr *addr, void *context) | |
453 | { | |
454 | memcpy(((struct resolve_cb_context *)context)->addr, addr, sizeof(struct | |
455 | rdma_dev_addr)); | |
456 | complete(&((struct resolve_cb_context *)context)->comp); | |
457 | } | |
458 | ||
73cdaaee | 459 | int rdma_addr_find_dmac_by_grh(const union ib_gid *sgid, const union ib_gid *dgid, |
dbf727de | 460 | u8 *dmac, u16 *vlan_id, int if_index) |
dd5f03be MB |
461 | { |
462 | int ret = 0; | |
463 | struct rdma_dev_addr dev_addr; | |
464 | struct resolve_cb_context ctx; | |
465 | struct net_device *dev; | |
466 | ||
467 | union { | |
468 | struct sockaddr _sockaddr; | |
469 | struct sockaddr_in _sockaddr_in; | |
470 | struct sockaddr_in6 _sockaddr_in6; | |
471 | } sgid_addr, dgid_addr; | |
472 | ||
473 | ||
471e7058 HL |
474 | rdma_gid2ip(&sgid_addr._sockaddr, sgid); |
475 | rdma_gid2ip(&dgid_addr._sockaddr, dgid); | |
dd5f03be MB |
476 | |
477 | memset(&dev_addr, 0, sizeof(dev_addr)); | |
dbf727de | 478 | dev_addr.bound_dev_if = if_index; |
565edd1d | 479 | dev_addr.net = &init_net; |
dd5f03be MB |
480 | |
481 | ctx.addr = &dev_addr; | |
482 | init_completion(&ctx.comp); | |
483 | ret = rdma_resolve_ip(&self, &sgid_addr._sockaddr, &dgid_addr._sockaddr, | |
484 | &dev_addr, 1000, resolve_cb, &ctx); | |
485 | if (ret) | |
486 | return ret; | |
487 | ||
488 | wait_for_completion(&ctx.comp); | |
489 | ||
490 | memcpy(dmac, dev_addr.dst_dev_addr, ETH_ALEN); | |
491 | dev = dev_get_by_index(&init_net, dev_addr.bound_dev_if); | |
492 | if (!dev) | |
493 | return -ENODEV; | |
494 | if (vlan_id) | |
495 | *vlan_id = rdma_vlan_dev_vlan_id(dev); | |
496 | dev_put(dev); | |
497 | return ret; | |
498 | } | |
499 | EXPORT_SYMBOL(rdma_addr_find_dmac_by_grh); | |
500 | ||
501 | int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id) | |
502 | { | |
503 | int ret = 0; | |
504 | struct rdma_dev_addr dev_addr; | |
505 | union { | |
506 | struct sockaddr _sockaddr; | |
507 | struct sockaddr_in _sockaddr_in; | |
508 | struct sockaddr_in6 _sockaddr_in6; | |
509 | } gid_addr; | |
510 | ||
471e7058 | 511 | rdma_gid2ip(&gid_addr._sockaddr, sgid); |
dd5f03be | 512 | |
dd5f03be | 513 | memset(&dev_addr, 0, sizeof(dev_addr)); |
565edd1d | 514 | dev_addr.net = &init_net; |
dd5f03be MB |
515 | ret = rdma_translate_ip(&gid_addr._sockaddr, &dev_addr, vlan_id); |
516 | if (ret) | |
517 | return ret; | |
518 | ||
519 | memcpy(smac, dev_addr.src_dev_addr, ETH_ALEN); | |
520 | return ret; | |
521 | } | |
522 | EXPORT_SYMBOL(rdma_addr_find_smac_by_sgid); | |
523 | ||
3cd96564 | 524 | static int netevent_callback(struct notifier_block *self, unsigned long event, |
e795d092 | 525 | void *ctx) |
7025fcd3 | 526 | { |
3cd96564 | 527 | if (event == NETEVENT_NEIGH_UPDATE) { |
e795d092 | 528 | struct neighbour *neigh = ctx; |
7025fcd3 | 529 | |
1f126670 | 530 | if (neigh->nud_state & NUD_VALID) { |
e795d092 TT |
531 | set_timeout(jiffies); |
532 | } | |
533 | } | |
7025fcd3 SH |
534 | return 0; |
535 | } | |
536 | ||
e795d092 TT |
537 | static struct notifier_block nb = { |
538 | .notifier_call = netevent_callback | |
7025fcd3 SH |
539 | }; |
540 | ||
716abb1f | 541 | static int __init addr_init(void) |
7025fcd3 | 542 | { |
c7f743a6 | 543 | addr_wq = create_singlethread_workqueue("ib_addr"); |
7025fcd3 SH |
544 | if (!addr_wq) |
545 | return -ENOMEM; | |
546 | ||
e795d092 | 547 | register_netevent_notifier(&nb); |
dd5f03be | 548 | rdma_addr_register_client(&self); |
7025fcd3 SH |
549 | return 0; |
550 | } | |
551 | ||
716abb1f | 552 | static void __exit addr_cleanup(void) |
7025fcd3 | 553 | { |
dd5f03be | 554 | rdma_addr_unregister_client(&self); |
e795d092 | 555 | unregister_netevent_notifier(&nb); |
7025fcd3 SH |
556 | destroy_workqueue(addr_wq); |
557 | } | |
558 | ||
559 | module_init(addr_init); | |
560 | module_exit(addr_cleanup); |