]>
Commit | Line | Data |
---|---|---|
30dc5e63 TN |
1 | /* |
2 | * Copyright (c) 2014 Chelsio, Inc. All rights reserved. | |
3 | * Copyright (c) 2014 Intel Corporation. All rights reserved. | |
4 | * | |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
34 | #include "iwpm_util.h" | |
35 | ||
6eec1774 TN |
36 | #define IWPM_MAPINFO_HASH_SIZE 512 |
37 | #define IWPM_MAPINFO_HASH_MASK (IWPM_MAPINFO_HASH_SIZE - 1) | |
38 | #define IWPM_REMINFO_HASH_SIZE 64 | |
39 | #define IWPM_REMINFO_HASH_MASK (IWPM_REMINFO_HASH_SIZE - 1) | |
e972dabf | 40 | #define IWPM_MSG_SIZE 512 |
30dc5e63 TN |
41 | |
42 | static LIST_HEAD(iwpm_nlmsg_req_list); | |
43 | static DEFINE_SPINLOCK(iwpm_nlmsg_req_lock); | |
44 | ||
45 | static struct hlist_head *iwpm_hash_bucket; | |
46 | static DEFINE_SPINLOCK(iwpm_mapinfo_lock); | |
47 | ||
6eec1774 TN |
48 | static struct hlist_head *iwpm_reminfo_bucket; |
49 | static DEFINE_SPINLOCK(iwpm_reminfo_lock); | |
50 | ||
30dc5e63 TN |
51 | static DEFINE_MUTEX(iwpm_admin_lock); |
52 | static struct iwpm_admin_data iwpm_admin; | |
53 | ||
54 | int iwpm_init(u8 nl_client) | |
55 | { | |
6eec1774 | 56 | int ret = 0; |
30dc5e63 TN |
57 | if (iwpm_valid_client(nl_client)) |
58 | return -EINVAL; | |
59 | mutex_lock(&iwpm_admin_lock); | |
60 | if (atomic_read(&iwpm_admin.refcount) == 0) { | |
6eec1774 | 61 | iwpm_hash_bucket = kzalloc(IWPM_MAPINFO_HASH_SIZE * |
30dc5e63 TN |
62 | sizeof(struct hlist_head), GFP_KERNEL); |
63 | if (!iwpm_hash_bucket) { | |
6eec1774 | 64 | ret = -ENOMEM; |
6eec1774 TN |
65 | goto init_exit; |
66 | } | |
67 | iwpm_reminfo_bucket = kzalloc(IWPM_REMINFO_HASH_SIZE * | |
68 | sizeof(struct hlist_head), GFP_KERNEL); | |
69 | if (!iwpm_reminfo_bucket) { | |
70 | kfree(iwpm_hash_bucket); | |
71 | ret = -ENOMEM; | |
6eec1774 | 72 | goto init_exit; |
30dc5e63 TN |
73 | } |
74 | } | |
75 | atomic_inc(&iwpm_admin.refcount); | |
6eec1774 | 76 | init_exit: |
30dc5e63 | 77 | mutex_unlock(&iwpm_admin_lock); |
6eec1774 TN |
78 | if (!ret) { |
79 | iwpm_set_valid(nl_client, 1); | |
a7f2f24c | 80 | iwpm_set_registration(nl_client, IWPM_REG_UNDEF); |
6eec1774 TN |
81 | pr_debug("%s: Mapinfo and reminfo tables are created\n", |
82 | __func__); | |
83 | } | |
84 | return ret; | |
30dc5e63 TN |
85 | } |
86 | EXPORT_SYMBOL(iwpm_init); | |
87 | ||
88 | static void free_hash_bucket(void); | |
6eec1774 | 89 | static void free_reminfo_bucket(void); |
30dc5e63 TN |
90 | |
91 | int iwpm_exit(u8 nl_client) | |
92 | { | |
93 | ||
94 | if (!iwpm_valid_client(nl_client)) | |
95 | return -EINVAL; | |
96 | mutex_lock(&iwpm_admin_lock); | |
97 | if (atomic_read(&iwpm_admin.refcount) == 0) { | |
98 | mutex_unlock(&iwpm_admin_lock); | |
99 | pr_err("%s Incorrect usage - negative refcount\n", __func__); | |
100 | return -EINVAL; | |
101 | } | |
102 | if (atomic_dec_and_test(&iwpm_admin.refcount)) { | |
103 | free_hash_bucket(); | |
6eec1774 TN |
104 | free_reminfo_bucket(); |
105 | pr_debug("%s: Resources are destroyed\n", __func__); | |
30dc5e63 TN |
106 | } |
107 | mutex_unlock(&iwpm_admin_lock); | |
108 | iwpm_set_valid(nl_client, 0); | |
a7f2f24c | 109 | iwpm_set_registration(nl_client, IWPM_REG_UNDEF); |
30dc5e63 TN |
110 | return 0; |
111 | } | |
112 | EXPORT_SYMBOL(iwpm_exit); | |
113 | ||
6eec1774 | 114 | static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage *, |
30dc5e63 TN |
115 | struct sockaddr_storage *); |
116 | ||
117 | int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr, | |
118 | struct sockaddr_storage *mapped_sockaddr, | |
119 | u8 nl_client) | |
120 | { | |
121 | struct hlist_head *hash_bucket_head; | |
122 | struct iwpm_mapping_info *map_info; | |
123 | unsigned long flags; | |
6eec1774 | 124 | int ret = -EINVAL; |
30dc5e63 TN |
125 | |
126 | if (!iwpm_valid_client(nl_client)) | |
6eec1774 | 127 | return ret; |
30dc5e63 | 128 | map_info = kzalloc(sizeof(struct iwpm_mapping_info), GFP_KERNEL); |
a0b3455f | 129 | if (!map_info) |
30dc5e63 | 130 | return -ENOMEM; |
a0b3455f | 131 | |
30dc5e63 TN |
132 | memcpy(&map_info->local_sockaddr, local_sockaddr, |
133 | sizeof(struct sockaddr_storage)); | |
134 | memcpy(&map_info->mapped_sockaddr, mapped_sockaddr, | |
135 | sizeof(struct sockaddr_storage)); | |
136 | map_info->nl_client = nl_client; | |
137 | ||
138 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
139 | if (iwpm_hash_bucket) { | |
6eec1774 | 140 | hash_bucket_head = get_mapinfo_hash_bucket( |
30dc5e63 TN |
141 | &map_info->local_sockaddr, |
142 | &map_info->mapped_sockaddr); | |
6eec1774 TN |
143 | if (hash_bucket_head) { |
144 | hlist_add_head(&map_info->hlist_node, hash_bucket_head); | |
145 | ret = 0; | |
146 | } | |
30dc5e63 TN |
147 | } |
148 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
6eec1774 | 149 | return ret; |
30dc5e63 TN |
150 | } |
151 | EXPORT_SYMBOL(iwpm_create_mapinfo); | |
152 | ||
153 | int iwpm_remove_mapinfo(struct sockaddr_storage *local_sockaddr, | |
154 | struct sockaddr_storage *mapped_local_addr) | |
155 | { | |
156 | struct hlist_node *tmp_hlist_node; | |
157 | struct hlist_head *hash_bucket_head; | |
158 | struct iwpm_mapping_info *map_info = NULL; | |
159 | unsigned long flags; | |
160 | int ret = -EINVAL; | |
161 | ||
162 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
163 | if (iwpm_hash_bucket) { | |
6eec1774 | 164 | hash_bucket_head = get_mapinfo_hash_bucket( |
30dc5e63 TN |
165 | local_sockaddr, |
166 | mapped_local_addr); | |
6eec1774 TN |
167 | if (!hash_bucket_head) |
168 | goto remove_mapinfo_exit; | |
169 | ||
30dc5e63 TN |
170 | hlist_for_each_entry_safe(map_info, tmp_hlist_node, |
171 | hash_bucket_head, hlist_node) { | |
172 | ||
173 | if (!iwpm_compare_sockaddr(&map_info->mapped_sockaddr, | |
174 | mapped_local_addr)) { | |
175 | ||
176 | hlist_del_init(&map_info->hlist_node); | |
177 | kfree(map_info); | |
178 | ret = 0; | |
179 | break; | |
180 | } | |
181 | } | |
182 | } | |
6eec1774 | 183 | remove_mapinfo_exit: |
30dc5e63 TN |
184 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); |
185 | return ret; | |
186 | } | |
187 | EXPORT_SYMBOL(iwpm_remove_mapinfo); | |
188 | ||
189 | static void free_hash_bucket(void) | |
190 | { | |
191 | struct hlist_node *tmp_hlist_node; | |
192 | struct iwpm_mapping_info *map_info; | |
193 | unsigned long flags; | |
194 | int i; | |
195 | ||
196 | /* remove all the mapinfo data from the list */ | |
197 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
6eec1774 | 198 | for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) { |
30dc5e63 TN |
199 | hlist_for_each_entry_safe(map_info, tmp_hlist_node, |
200 | &iwpm_hash_bucket[i], hlist_node) { | |
201 | ||
202 | hlist_del_init(&map_info->hlist_node); | |
203 | kfree(map_info); | |
204 | } | |
205 | } | |
206 | /* free the hash list */ | |
207 | kfree(iwpm_hash_bucket); | |
208 | iwpm_hash_bucket = NULL; | |
209 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
210 | } | |
211 | ||
6eec1774 TN |
212 | static void free_reminfo_bucket(void) |
213 | { | |
214 | struct hlist_node *tmp_hlist_node; | |
215 | struct iwpm_remote_info *rem_info; | |
216 | unsigned long flags; | |
217 | int i; | |
218 | ||
219 | /* remove all the remote info from the list */ | |
220 | spin_lock_irqsave(&iwpm_reminfo_lock, flags); | |
221 | for (i = 0; i < IWPM_REMINFO_HASH_SIZE; i++) { | |
222 | hlist_for_each_entry_safe(rem_info, tmp_hlist_node, | |
223 | &iwpm_reminfo_bucket[i], hlist_node) { | |
224 | ||
225 | hlist_del_init(&rem_info->hlist_node); | |
226 | kfree(rem_info); | |
227 | } | |
228 | } | |
229 | /* free the hash list */ | |
230 | kfree(iwpm_reminfo_bucket); | |
231 | iwpm_reminfo_bucket = NULL; | |
232 | spin_unlock_irqrestore(&iwpm_reminfo_lock, flags); | |
233 | } | |
234 | ||
235 | static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage *, | |
236 | struct sockaddr_storage *); | |
237 | ||
238 | void iwpm_add_remote_info(struct iwpm_remote_info *rem_info) | |
239 | { | |
240 | struct hlist_head *hash_bucket_head; | |
241 | unsigned long flags; | |
242 | ||
243 | spin_lock_irqsave(&iwpm_reminfo_lock, flags); | |
244 | if (iwpm_reminfo_bucket) { | |
245 | hash_bucket_head = get_reminfo_hash_bucket( | |
246 | &rem_info->mapped_loc_sockaddr, | |
247 | &rem_info->mapped_rem_sockaddr); | |
248 | if (hash_bucket_head) | |
249 | hlist_add_head(&rem_info->hlist_node, hash_bucket_head); | |
250 | } | |
251 | spin_unlock_irqrestore(&iwpm_reminfo_lock, flags); | |
252 | } | |
253 | ||
254 | int iwpm_get_remote_info(struct sockaddr_storage *mapped_loc_addr, | |
dafb5587 FL |
255 | struct sockaddr_storage *mapped_rem_addr, |
256 | struct sockaddr_storage *remote_addr, | |
257 | u8 nl_client) | |
6eec1774 TN |
258 | { |
259 | struct hlist_node *tmp_hlist_node; | |
260 | struct hlist_head *hash_bucket_head; | |
261 | struct iwpm_remote_info *rem_info = NULL; | |
262 | unsigned long flags; | |
263 | int ret = -EINVAL; | |
264 | ||
265 | if (!iwpm_valid_client(nl_client)) { | |
266 | pr_info("%s: Invalid client = %d\n", __func__, nl_client); | |
267 | return ret; | |
268 | } | |
269 | spin_lock_irqsave(&iwpm_reminfo_lock, flags); | |
270 | if (iwpm_reminfo_bucket) { | |
271 | hash_bucket_head = get_reminfo_hash_bucket( | |
272 | mapped_loc_addr, | |
273 | mapped_rem_addr); | |
274 | if (!hash_bucket_head) | |
275 | goto get_remote_info_exit; | |
276 | hlist_for_each_entry_safe(rem_info, tmp_hlist_node, | |
277 | hash_bucket_head, hlist_node) { | |
278 | ||
279 | if (!iwpm_compare_sockaddr(&rem_info->mapped_loc_sockaddr, | |
280 | mapped_loc_addr) && | |
281 | !iwpm_compare_sockaddr(&rem_info->mapped_rem_sockaddr, | |
282 | mapped_rem_addr)) { | |
283 | ||
284 | memcpy(remote_addr, &rem_info->remote_sockaddr, | |
285 | sizeof(struct sockaddr_storage)); | |
286 | iwpm_print_sockaddr(remote_addr, | |
287 | "get_remote_info: Remote sockaddr:"); | |
288 | ||
289 | hlist_del_init(&rem_info->hlist_node); | |
290 | kfree(rem_info); | |
291 | ret = 0; | |
292 | break; | |
293 | } | |
294 | } | |
295 | } | |
296 | get_remote_info_exit: | |
297 | spin_unlock_irqrestore(&iwpm_reminfo_lock, flags); | |
298 | return ret; | |
299 | } | |
300 | EXPORT_SYMBOL(iwpm_get_remote_info); | |
301 | ||
30dc5e63 TN |
302 | struct iwpm_nlmsg_request *iwpm_get_nlmsg_request(__u32 nlmsg_seq, |
303 | u8 nl_client, gfp_t gfp) | |
304 | { | |
305 | struct iwpm_nlmsg_request *nlmsg_request = NULL; | |
306 | unsigned long flags; | |
307 | ||
308 | nlmsg_request = kzalloc(sizeof(struct iwpm_nlmsg_request), gfp); | |
a0b3455f | 309 | if (!nlmsg_request) |
30dc5e63 | 310 | return NULL; |
a0b3455f | 311 | |
30dc5e63 TN |
312 | spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); |
313 | list_add_tail(&nlmsg_request->inprocess_list, &iwpm_nlmsg_req_list); | |
314 | spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); | |
315 | ||
316 | kref_init(&nlmsg_request->kref); | |
317 | kref_get(&nlmsg_request->kref); | |
318 | nlmsg_request->nlmsg_seq = nlmsg_seq; | |
319 | nlmsg_request->nl_client = nl_client; | |
320 | nlmsg_request->request_done = 0; | |
321 | nlmsg_request->err_code = 0; | |
dafb5587 FL |
322 | sema_init(&nlmsg_request->sem, 1); |
323 | down(&nlmsg_request->sem); | |
30dc5e63 TN |
324 | return nlmsg_request; |
325 | } | |
326 | ||
327 | void iwpm_free_nlmsg_request(struct kref *kref) | |
328 | { | |
329 | struct iwpm_nlmsg_request *nlmsg_request; | |
330 | unsigned long flags; | |
331 | ||
332 | nlmsg_request = container_of(kref, struct iwpm_nlmsg_request, kref); | |
333 | ||
334 | spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); | |
335 | list_del_init(&nlmsg_request->inprocess_list); | |
336 | spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); | |
337 | ||
338 | if (!nlmsg_request->request_done) | |
339 | pr_debug("%s Freeing incomplete nlmsg request (seq = %u).\n", | |
340 | __func__, nlmsg_request->nlmsg_seq); | |
341 | kfree(nlmsg_request); | |
342 | } | |
343 | ||
344 | struct iwpm_nlmsg_request *iwpm_find_nlmsg_request(__u32 echo_seq) | |
345 | { | |
346 | struct iwpm_nlmsg_request *nlmsg_request; | |
347 | struct iwpm_nlmsg_request *found_request = NULL; | |
348 | unsigned long flags; | |
349 | ||
350 | spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); | |
351 | list_for_each_entry(nlmsg_request, &iwpm_nlmsg_req_list, | |
352 | inprocess_list) { | |
353 | if (nlmsg_request->nlmsg_seq == echo_seq) { | |
354 | found_request = nlmsg_request; | |
355 | kref_get(&nlmsg_request->kref); | |
356 | break; | |
357 | } | |
358 | } | |
359 | spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); | |
360 | return found_request; | |
361 | } | |
362 | ||
363 | int iwpm_wait_complete_req(struct iwpm_nlmsg_request *nlmsg_request) | |
364 | { | |
365 | int ret; | |
30dc5e63 | 366 | |
dafb5587 FL |
367 | ret = down_timeout(&nlmsg_request->sem, IWPM_NL_TIMEOUT); |
368 | if (ret) { | |
30dc5e63 TN |
369 | ret = -EINVAL; |
370 | pr_info("%s: Timeout %d sec for netlink request (seq = %u)\n", | |
371 | __func__, (IWPM_NL_TIMEOUT/HZ), nlmsg_request->nlmsg_seq); | |
372 | } else { | |
373 | ret = nlmsg_request->err_code; | |
374 | } | |
375 | kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); | |
376 | return ret; | |
377 | } | |
378 | ||
379 | int iwpm_get_nlmsg_seq(void) | |
380 | { | |
381 | return atomic_inc_return(&iwpm_admin.nlmsg_seq); | |
382 | } | |
383 | ||
384 | int iwpm_valid_client(u8 nl_client) | |
385 | { | |
386 | if (nl_client >= RDMA_NL_NUM_CLIENTS) | |
387 | return 0; | |
388 | return iwpm_admin.client_list[nl_client]; | |
389 | } | |
390 | ||
391 | void iwpm_set_valid(u8 nl_client, int valid) | |
392 | { | |
393 | if (nl_client >= RDMA_NL_NUM_CLIENTS) | |
394 | return; | |
395 | iwpm_admin.client_list[nl_client] = valid; | |
396 | } | |
397 | ||
398 | /* valid client */ | |
a7f2f24c | 399 | u32 iwpm_get_registration(u8 nl_client) |
30dc5e63 TN |
400 | { |
401 | return iwpm_admin.reg_list[nl_client]; | |
402 | } | |
403 | ||
404 | /* valid client */ | |
a7f2f24c | 405 | void iwpm_set_registration(u8 nl_client, u32 reg) |
30dc5e63 TN |
406 | { |
407 | iwpm_admin.reg_list[nl_client] = reg; | |
408 | } | |
409 | ||
a7f2f24c TN |
410 | /* valid client */ |
411 | u32 iwpm_check_registration(u8 nl_client, u32 reg) | |
412 | { | |
413 | return (iwpm_get_registration(nl_client) & reg); | |
414 | } | |
415 | ||
30dc5e63 TN |
416 | int iwpm_compare_sockaddr(struct sockaddr_storage *a_sockaddr, |
417 | struct sockaddr_storage *b_sockaddr) | |
418 | { | |
419 | if (a_sockaddr->ss_family != b_sockaddr->ss_family) | |
420 | return 1; | |
421 | if (a_sockaddr->ss_family == AF_INET) { | |
422 | struct sockaddr_in *a4_sockaddr = | |
423 | (struct sockaddr_in *)a_sockaddr; | |
424 | struct sockaddr_in *b4_sockaddr = | |
425 | (struct sockaddr_in *)b_sockaddr; | |
426 | if (!memcmp(&a4_sockaddr->sin_addr, | |
427 | &b4_sockaddr->sin_addr, sizeof(struct in_addr)) | |
428 | && a4_sockaddr->sin_port == b4_sockaddr->sin_port) | |
429 | return 0; | |
430 | ||
431 | } else if (a_sockaddr->ss_family == AF_INET6) { | |
432 | struct sockaddr_in6 *a6_sockaddr = | |
433 | (struct sockaddr_in6 *)a_sockaddr; | |
434 | struct sockaddr_in6 *b6_sockaddr = | |
435 | (struct sockaddr_in6 *)b_sockaddr; | |
436 | if (!memcmp(&a6_sockaddr->sin6_addr, | |
437 | &b6_sockaddr->sin6_addr, sizeof(struct in6_addr)) | |
438 | && a6_sockaddr->sin6_port == b6_sockaddr->sin6_port) | |
439 | return 0; | |
440 | ||
441 | } else { | |
442 | pr_err("%s: Invalid sockaddr family\n", __func__); | |
443 | } | |
444 | return 1; | |
445 | } | |
446 | ||
447 | struct sk_buff *iwpm_create_nlmsg(u32 nl_op, struct nlmsghdr **nlh, | |
448 | int nl_client) | |
449 | { | |
450 | struct sk_buff *skb = NULL; | |
451 | ||
e972dabf | 452 | skb = dev_alloc_skb(IWPM_MSG_SIZE); |
30dc5e63 TN |
453 | if (!skb) { |
454 | pr_err("%s Unable to allocate skb\n", __func__); | |
455 | goto create_nlmsg_exit; | |
456 | } | |
457 | if (!(ibnl_put_msg(skb, nlh, 0, 0, nl_client, nl_op, | |
458 | NLM_F_REQUEST))) { | |
459 | pr_warn("%s: Unable to put the nlmsg header\n", __func__); | |
460 | dev_kfree_skb(skb); | |
461 | skb = NULL; | |
462 | } | |
463 | create_nlmsg_exit: | |
464 | return skb; | |
465 | } | |
466 | ||
467 | int iwpm_parse_nlmsg(struct netlink_callback *cb, int policy_max, | |
468 | const struct nla_policy *nlmsg_policy, | |
469 | struct nlattr *nltb[], const char *msg_type) | |
470 | { | |
471 | int nlh_len = 0; | |
472 | int ret; | |
473 | const char *err_str = ""; | |
474 | ||
fceb6435 JB |
475 | ret = nlmsg_validate(cb->nlh, nlh_len, policy_max - 1, nlmsg_policy, |
476 | NULL); | |
30dc5e63 TN |
477 | if (ret) { |
478 | err_str = "Invalid attribute"; | |
479 | goto parse_nlmsg_error; | |
480 | } | |
fceb6435 JB |
481 | ret = nlmsg_parse(cb->nlh, nlh_len, nltb, policy_max - 1, |
482 | nlmsg_policy, NULL); | |
30dc5e63 TN |
483 | if (ret) { |
484 | err_str = "Unable to parse the nlmsg"; | |
485 | goto parse_nlmsg_error; | |
486 | } | |
487 | ret = iwpm_validate_nlmsg_attr(nltb, policy_max); | |
488 | if (ret) { | |
489 | err_str = "Invalid NULL attribute"; | |
490 | goto parse_nlmsg_error; | |
491 | } | |
492 | return 0; | |
493 | parse_nlmsg_error: | |
494 | pr_warn("%s: %s (msg type %s ret = %d)\n", | |
495 | __func__, err_str, msg_type, ret); | |
496 | return ret; | |
497 | } | |
498 | ||
499 | void iwpm_print_sockaddr(struct sockaddr_storage *sockaddr, char *msg) | |
500 | { | |
501 | struct sockaddr_in6 *sockaddr_v6; | |
502 | struct sockaddr_in *sockaddr_v4; | |
503 | ||
504 | switch (sockaddr->ss_family) { | |
505 | case AF_INET: | |
506 | sockaddr_v4 = (struct sockaddr_in *)sockaddr; | |
507 | pr_debug("%s IPV4 %pI4: %u(0x%04X)\n", | |
508 | msg, &sockaddr_v4->sin_addr, | |
509 | ntohs(sockaddr_v4->sin_port), | |
510 | ntohs(sockaddr_v4->sin_port)); | |
511 | break; | |
512 | case AF_INET6: | |
513 | sockaddr_v6 = (struct sockaddr_in6 *)sockaddr; | |
514 | pr_debug("%s IPV6 %pI6: %u(0x%04X)\n", | |
515 | msg, &sockaddr_v6->sin6_addr, | |
516 | ntohs(sockaddr_v6->sin6_port), | |
517 | ntohs(sockaddr_v6->sin6_port)); | |
518 | break; | |
519 | default: | |
520 | break; | |
521 | } | |
522 | } | |
523 | ||
524 | static u32 iwpm_ipv6_jhash(struct sockaddr_in6 *ipv6_sockaddr) | |
525 | { | |
526 | u32 ipv6_hash = jhash(&ipv6_sockaddr->sin6_addr, sizeof(struct in6_addr), 0); | |
527 | u32 hash = jhash_2words(ipv6_hash, (__force u32) ipv6_sockaddr->sin6_port, 0); | |
528 | return hash; | |
529 | } | |
530 | ||
531 | static u32 iwpm_ipv4_jhash(struct sockaddr_in *ipv4_sockaddr) | |
532 | { | |
533 | u32 ipv4_hash = jhash(&ipv4_sockaddr->sin_addr, sizeof(struct in_addr), 0); | |
534 | u32 hash = jhash_2words(ipv4_hash, (__force u32) ipv4_sockaddr->sin_port, 0); | |
535 | return hash; | |
536 | } | |
537 | ||
6eec1774 TN |
538 | static int get_hash_bucket(struct sockaddr_storage *a_sockaddr, |
539 | struct sockaddr_storage *b_sockaddr, u32 *hash) | |
30dc5e63 | 540 | { |
6eec1774 | 541 | u32 a_hash, b_hash; |
30dc5e63 | 542 | |
6eec1774 TN |
543 | if (a_sockaddr->ss_family == AF_INET) { |
544 | a_hash = iwpm_ipv4_jhash((struct sockaddr_in *) a_sockaddr); | |
545 | b_hash = iwpm_ipv4_jhash((struct sockaddr_in *) b_sockaddr); | |
30dc5e63 | 546 | |
6eec1774 TN |
547 | } else if (a_sockaddr->ss_family == AF_INET6) { |
548 | a_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) a_sockaddr); | |
549 | b_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) b_sockaddr); | |
30dc5e63 TN |
550 | } else { |
551 | pr_err("%s: Invalid sockaddr family\n", __func__); | |
6eec1774 | 552 | return -EINVAL; |
30dc5e63 TN |
553 | } |
554 | ||
6eec1774 TN |
555 | if (a_hash == b_hash) /* if port mapper isn't available */ |
556 | *hash = a_hash; | |
30dc5e63 | 557 | else |
6eec1774 TN |
558 | *hash = jhash_2words(a_hash, b_hash, 0); |
559 | return 0; | |
560 | } | |
561 | ||
562 | static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage | |
563 | *local_sockaddr, struct sockaddr_storage | |
564 | *mapped_sockaddr) | |
565 | { | |
566 | u32 hash; | |
567 | int ret; | |
30dc5e63 | 568 | |
6eec1774 TN |
569 | ret = get_hash_bucket(local_sockaddr, mapped_sockaddr, &hash); |
570 | if (ret) | |
571 | return NULL; | |
572 | return &iwpm_hash_bucket[hash & IWPM_MAPINFO_HASH_MASK]; | |
573 | } | |
574 | ||
575 | static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage | |
576 | *mapped_loc_sockaddr, struct sockaddr_storage | |
577 | *mapped_rem_sockaddr) | |
578 | { | |
579 | u32 hash; | |
580 | int ret; | |
581 | ||
582 | ret = get_hash_bucket(mapped_loc_sockaddr, mapped_rem_sockaddr, &hash); | |
583 | if (ret) | |
584 | return NULL; | |
585 | return &iwpm_reminfo_bucket[hash & IWPM_REMINFO_HASH_MASK]; | |
30dc5e63 TN |
586 | } |
587 | ||
588 | static int send_mapinfo_num(u32 mapping_num, u8 nl_client, int iwpm_pid) | |
589 | { | |
590 | struct sk_buff *skb = NULL; | |
591 | struct nlmsghdr *nlh; | |
592 | u32 msg_seq; | |
593 | const char *err_str = ""; | |
594 | int ret = -EINVAL; | |
595 | ||
596 | skb = iwpm_create_nlmsg(RDMA_NL_IWPM_MAPINFO_NUM, &nlh, nl_client); | |
597 | if (!skb) { | |
598 | err_str = "Unable to create a nlmsg"; | |
599 | goto mapinfo_num_error; | |
600 | } | |
601 | nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); | |
602 | msg_seq = 0; | |
603 | err_str = "Unable to put attribute of mapinfo number nlmsg"; | |
604 | ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_MAPINFO_SEQ); | |
605 | if (ret) | |
606 | goto mapinfo_num_error; | |
607 | ret = ibnl_put_attr(skb, nlh, sizeof(u32), | |
608 | &mapping_num, IWPM_NLA_MAPINFO_SEND_NUM); | |
609 | if (ret) | |
610 | goto mapinfo_num_error; | |
611 | ret = ibnl_unicast(skb, nlh, iwpm_pid); | |
612 | if (ret) { | |
613 | skb = NULL; | |
614 | err_str = "Unable to send a nlmsg"; | |
615 | goto mapinfo_num_error; | |
616 | } | |
617 | pr_debug("%s: Sent mapping number = %d\n", __func__, mapping_num); | |
618 | return 0; | |
619 | mapinfo_num_error: | |
620 | pr_info("%s: %s\n", __func__, err_str); | |
621 | if (skb) | |
622 | dev_kfree_skb(skb); | |
623 | return ret; | |
624 | } | |
625 | ||
626 | static int send_nlmsg_done(struct sk_buff *skb, u8 nl_client, int iwpm_pid) | |
627 | { | |
628 | struct nlmsghdr *nlh = NULL; | |
629 | int ret = 0; | |
630 | ||
631 | if (!skb) | |
632 | return ret; | |
633 | if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client, | |
634 | RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) { | |
635 | pr_warn("%s Unable to put NLMSG_DONE\n", __func__); | |
5ed935e8 | 636 | dev_kfree_skb(skb); |
30dc5e63 TN |
637 | return -ENOMEM; |
638 | } | |
639 | nlh->nlmsg_type = NLMSG_DONE; | |
640 | ret = ibnl_unicast(skb, (struct nlmsghdr *)skb->data, iwpm_pid); | |
641 | if (ret) | |
642 | pr_warn("%s Unable to send a nlmsg\n", __func__); | |
643 | return ret; | |
644 | } | |
645 | ||
646 | int iwpm_send_mapinfo(u8 nl_client, int iwpm_pid) | |
647 | { | |
648 | struct iwpm_mapping_info *map_info; | |
649 | struct sk_buff *skb = NULL; | |
650 | struct nlmsghdr *nlh; | |
651 | int skb_num = 0, mapping_num = 0; | |
652 | int i = 0, nlmsg_bytes = 0; | |
653 | unsigned long flags; | |
654 | const char *err_str = ""; | |
655 | int ret; | |
656 | ||
657 | skb = dev_alloc_skb(NLMSG_GOODSIZE); | |
658 | if (!skb) { | |
659 | ret = -ENOMEM; | |
660 | err_str = "Unable to allocate skb"; | |
661 | goto send_mapping_info_exit; | |
662 | } | |
663 | skb_num++; | |
664 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
6eec1774 | 665 | for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) { |
30dc5e63 TN |
666 | hlist_for_each_entry(map_info, &iwpm_hash_bucket[i], |
667 | hlist_node) { | |
668 | if (map_info->nl_client != nl_client) | |
669 | continue; | |
670 | nlh = NULL; | |
671 | if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client, | |
672 | RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) { | |
673 | ret = -ENOMEM; | |
674 | err_str = "Unable to put the nlmsg header"; | |
675 | goto send_mapping_info_unlock; | |
676 | } | |
677 | err_str = "Unable to put attribute of the nlmsg"; | |
678 | ret = ibnl_put_attr(skb, nlh, | |
679 | sizeof(struct sockaddr_storage), | |
680 | &map_info->local_sockaddr, | |
681 | IWPM_NLA_MAPINFO_LOCAL_ADDR); | |
682 | if (ret) | |
683 | goto send_mapping_info_unlock; | |
684 | ||
685 | ret = ibnl_put_attr(skb, nlh, | |
686 | sizeof(struct sockaddr_storage), | |
687 | &map_info->mapped_sockaddr, | |
688 | IWPM_NLA_MAPINFO_MAPPED_ADDR); | |
689 | if (ret) | |
690 | goto send_mapping_info_unlock; | |
691 | ||
692 | iwpm_print_sockaddr(&map_info->local_sockaddr, | |
693 | "send_mapping_info: Local sockaddr:"); | |
694 | iwpm_print_sockaddr(&map_info->mapped_sockaddr, | |
695 | "send_mapping_info: Mapped local sockaddr:"); | |
696 | mapping_num++; | |
697 | nlmsg_bytes += nlh->nlmsg_len; | |
698 | ||
699 | /* check if all mappings can fit in one skb */ | |
700 | if (NLMSG_GOODSIZE - nlmsg_bytes < nlh->nlmsg_len * 2) { | |
701 | /* and leave room for NLMSG_DONE */ | |
702 | nlmsg_bytes = 0; | |
703 | skb_num++; | |
704 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, | |
705 | flags); | |
706 | /* send the skb */ | |
707 | ret = send_nlmsg_done(skb, nl_client, iwpm_pid); | |
708 | skb = NULL; | |
709 | if (ret) { | |
710 | err_str = "Unable to send map info"; | |
711 | goto send_mapping_info_exit; | |
712 | } | |
713 | if (skb_num == IWPM_MAPINFO_SKB_COUNT) { | |
714 | ret = -ENOMEM; | |
715 | err_str = "Insufficient skbs for map info"; | |
716 | goto send_mapping_info_exit; | |
717 | } | |
718 | skb = dev_alloc_skb(NLMSG_GOODSIZE); | |
719 | if (!skb) { | |
720 | ret = -ENOMEM; | |
721 | err_str = "Unable to allocate skb"; | |
722 | goto send_mapping_info_exit; | |
723 | } | |
724 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
725 | } | |
726 | } | |
727 | } | |
728 | send_mapping_info_unlock: | |
729 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
730 | send_mapping_info_exit: | |
731 | if (ret) { | |
732 | pr_warn("%s: %s (ret = %d)\n", __func__, err_str, ret); | |
733 | if (skb) | |
734 | dev_kfree_skb(skb); | |
735 | return ret; | |
736 | } | |
737 | send_nlmsg_done(skb, nl_client, iwpm_pid); | |
738 | return send_mapinfo_num(mapping_num, nl_client, iwpm_pid); | |
739 | } | |
740 | ||
741 | int iwpm_mapinfo_available(void) | |
742 | { | |
743 | unsigned long flags; | |
744 | int full_bucket = 0, i = 0; | |
745 | ||
746 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
747 | if (iwpm_hash_bucket) { | |
6eec1774 | 748 | for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) { |
30dc5e63 TN |
749 | if (!hlist_empty(&iwpm_hash_bucket[i])) { |
750 | full_bucket = 1; | |
751 | break; | |
752 | } | |
753 | } | |
754 | } | |
755 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
756 | return full_bucket; | |
757 | } |