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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) | |
30dc5e63 TN |
40 | |
41 | static LIST_HEAD(iwpm_nlmsg_req_list); | |
42 | static DEFINE_SPINLOCK(iwpm_nlmsg_req_lock); | |
43 | ||
44 | static struct hlist_head *iwpm_hash_bucket; | |
45 | static DEFINE_SPINLOCK(iwpm_mapinfo_lock); | |
46 | ||
6eec1774 TN |
47 | static struct hlist_head *iwpm_reminfo_bucket; |
48 | static DEFINE_SPINLOCK(iwpm_reminfo_lock); | |
49 | ||
30dc5e63 TN |
50 | static DEFINE_MUTEX(iwpm_admin_lock); |
51 | static struct iwpm_admin_data iwpm_admin; | |
52 | ||
53 | int iwpm_init(u8 nl_client) | |
54 | { | |
6eec1774 | 55 | int ret = 0; |
30dc5e63 TN |
56 | if (iwpm_valid_client(nl_client)) |
57 | return -EINVAL; | |
58 | mutex_lock(&iwpm_admin_lock); | |
59 | if (atomic_read(&iwpm_admin.refcount) == 0) { | |
6eec1774 | 60 | iwpm_hash_bucket = kzalloc(IWPM_MAPINFO_HASH_SIZE * |
30dc5e63 TN |
61 | sizeof(struct hlist_head), GFP_KERNEL); |
62 | if (!iwpm_hash_bucket) { | |
6eec1774 | 63 | ret = -ENOMEM; |
30dc5e63 | 64 | pr_err("%s Unable to create mapinfo hash table\n", __func__); |
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; | |
72 | pr_err("%s Unable to create reminfo hash table\n", __func__); | |
73 | goto init_exit; | |
30dc5e63 TN |
74 | } |
75 | } | |
76 | atomic_inc(&iwpm_admin.refcount); | |
6eec1774 | 77 | init_exit: |
30dc5e63 | 78 | mutex_unlock(&iwpm_admin_lock); |
6eec1774 TN |
79 | if (!ret) { |
80 | iwpm_set_valid(nl_client, 1); | |
a7f2f24c | 81 | iwpm_set_registration(nl_client, IWPM_REG_UNDEF); |
6eec1774 TN |
82 | pr_debug("%s: Mapinfo and reminfo tables are created\n", |
83 | __func__); | |
84 | } | |
85 | return ret; | |
30dc5e63 TN |
86 | } |
87 | EXPORT_SYMBOL(iwpm_init); | |
88 | ||
89 | static void free_hash_bucket(void); | |
6eec1774 | 90 | static void free_reminfo_bucket(void); |
30dc5e63 TN |
91 | |
92 | int iwpm_exit(u8 nl_client) | |
93 | { | |
94 | ||
95 | if (!iwpm_valid_client(nl_client)) | |
96 | return -EINVAL; | |
97 | mutex_lock(&iwpm_admin_lock); | |
98 | if (atomic_read(&iwpm_admin.refcount) == 0) { | |
99 | mutex_unlock(&iwpm_admin_lock); | |
100 | pr_err("%s Incorrect usage - negative refcount\n", __func__); | |
101 | return -EINVAL; | |
102 | } | |
103 | if (atomic_dec_and_test(&iwpm_admin.refcount)) { | |
104 | free_hash_bucket(); | |
6eec1774 TN |
105 | free_reminfo_bucket(); |
106 | pr_debug("%s: Resources are destroyed\n", __func__); | |
30dc5e63 TN |
107 | } |
108 | mutex_unlock(&iwpm_admin_lock); | |
109 | iwpm_set_valid(nl_client, 0); | |
a7f2f24c | 110 | iwpm_set_registration(nl_client, IWPM_REG_UNDEF); |
30dc5e63 TN |
111 | return 0; |
112 | } | |
113 | EXPORT_SYMBOL(iwpm_exit); | |
114 | ||
6eec1774 | 115 | static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage *, |
30dc5e63 TN |
116 | struct sockaddr_storage *); |
117 | ||
118 | int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr, | |
119 | struct sockaddr_storage *mapped_sockaddr, | |
120 | u8 nl_client) | |
121 | { | |
122 | struct hlist_head *hash_bucket_head; | |
123 | struct iwpm_mapping_info *map_info; | |
124 | unsigned long flags; | |
6eec1774 | 125 | int ret = -EINVAL; |
30dc5e63 TN |
126 | |
127 | if (!iwpm_valid_client(nl_client)) | |
6eec1774 | 128 | return ret; |
30dc5e63 TN |
129 | map_info = kzalloc(sizeof(struct iwpm_mapping_info), GFP_KERNEL); |
130 | if (!map_info) { | |
131 | pr_err("%s: Unable to allocate a mapping info\n", __func__); | |
132 | return -ENOMEM; | |
133 | } | |
134 | memcpy(&map_info->local_sockaddr, local_sockaddr, | |
135 | sizeof(struct sockaddr_storage)); | |
136 | memcpy(&map_info->mapped_sockaddr, mapped_sockaddr, | |
137 | sizeof(struct sockaddr_storage)); | |
138 | map_info->nl_client = nl_client; | |
139 | ||
140 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
141 | if (iwpm_hash_bucket) { | |
6eec1774 | 142 | hash_bucket_head = get_mapinfo_hash_bucket( |
30dc5e63 TN |
143 | &map_info->local_sockaddr, |
144 | &map_info->mapped_sockaddr); | |
6eec1774 TN |
145 | if (hash_bucket_head) { |
146 | hlist_add_head(&map_info->hlist_node, hash_bucket_head); | |
147 | ret = 0; | |
148 | } | |
30dc5e63 TN |
149 | } |
150 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
6eec1774 | 151 | return ret; |
30dc5e63 TN |
152 | } |
153 | EXPORT_SYMBOL(iwpm_create_mapinfo); | |
154 | ||
155 | int iwpm_remove_mapinfo(struct sockaddr_storage *local_sockaddr, | |
156 | struct sockaddr_storage *mapped_local_addr) | |
157 | { | |
158 | struct hlist_node *tmp_hlist_node; | |
159 | struct hlist_head *hash_bucket_head; | |
160 | struct iwpm_mapping_info *map_info = NULL; | |
161 | unsigned long flags; | |
162 | int ret = -EINVAL; | |
163 | ||
164 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
165 | if (iwpm_hash_bucket) { | |
6eec1774 | 166 | hash_bucket_head = get_mapinfo_hash_bucket( |
30dc5e63 TN |
167 | local_sockaddr, |
168 | mapped_local_addr); | |
6eec1774 TN |
169 | if (!hash_bucket_head) |
170 | goto remove_mapinfo_exit; | |
171 | ||
30dc5e63 TN |
172 | hlist_for_each_entry_safe(map_info, tmp_hlist_node, |
173 | hash_bucket_head, hlist_node) { | |
174 | ||
175 | if (!iwpm_compare_sockaddr(&map_info->mapped_sockaddr, | |
176 | mapped_local_addr)) { | |
177 | ||
178 | hlist_del_init(&map_info->hlist_node); | |
179 | kfree(map_info); | |
180 | ret = 0; | |
181 | break; | |
182 | } | |
183 | } | |
184 | } | |
6eec1774 | 185 | remove_mapinfo_exit: |
30dc5e63 TN |
186 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); |
187 | return ret; | |
188 | } | |
189 | EXPORT_SYMBOL(iwpm_remove_mapinfo); | |
190 | ||
191 | static void free_hash_bucket(void) | |
192 | { | |
193 | struct hlist_node *tmp_hlist_node; | |
194 | struct iwpm_mapping_info *map_info; | |
195 | unsigned long flags; | |
196 | int i; | |
197 | ||
198 | /* remove all the mapinfo data from the list */ | |
199 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
6eec1774 | 200 | for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) { |
30dc5e63 TN |
201 | hlist_for_each_entry_safe(map_info, tmp_hlist_node, |
202 | &iwpm_hash_bucket[i], hlist_node) { | |
203 | ||
204 | hlist_del_init(&map_info->hlist_node); | |
205 | kfree(map_info); | |
206 | } | |
207 | } | |
208 | /* free the hash list */ | |
209 | kfree(iwpm_hash_bucket); | |
210 | iwpm_hash_bucket = NULL; | |
211 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
212 | } | |
213 | ||
6eec1774 TN |
214 | static void free_reminfo_bucket(void) |
215 | { | |
216 | struct hlist_node *tmp_hlist_node; | |
217 | struct iwpm_remote_info *rem_info; | |
218 | unsigned long flags; | |
219 | int i; | |
220 | ||
221 | /* remove all the remote info from the list */ | |
222 | spin_lock_irqsave(&iwpm_reminfo_lock, flags); | |
223 | for (i = 0; i < IWPM_REMINFO_HASH_SIZE; i++) { | |
224 | hlist_for_each_entry_safe(rem_info, tmp_hlist_node, | |
225 | &iwpm_reminfo_bucket[i], hlist_node) { | |
226 | ||
227 | hlist_del_init(&rem_info->hlist_node); | |
228 | kfree(rem_info); | |
229 | } | |
230 | } | |
231 | /* free the hash list */ | |
232 | kfree(iwpm_reminfo_bucket); | |
233 | iwpm_reminfo_bucket = NULL; | |
234 | spin_unlock_irqrestore(&iwpm_reminfo_lock, flags); | |
235 | } | |
236 | ||
237 | static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage *, | |
238 | struct sockaddr_storage *); | |
239 | ||
240 | void iwpm_add_remote_info(struct iwpm_remote_info *rem_info) | |
241 | { | |
242 | struct hlist_head *hash_bucket_head; | |
243 | unsigned long flags; | |
244 | ||
245 | spin_lock_irqsave(&iwpm_reminfo_lock, flags); | |
246 | if (iwpm_reminfo_bucket) { | |
247 | hash_bucket_head = get_reminfo_hash_bucket( | |
248 | &rem_info->mapped_loc_sockaddr, | |
249 | &rem_info->mapped_rem_sockaddr); | |
250 | if (hash_bucket_head) | |
251 | hlist_add_head(&rem_info->hlist_node, hash_bucket_head); | |
252 | } | |
253 | spin_unlock_irqrestore(&iwpm_reminfo_lock, flags); | |
254 | } | |
255 | ||
256 | int iwpm_get_remote_info(struct sockaddr_storage *mapped_loc_addr, | |
dafb5587 FL |
257 | struct sockaddr_storage *mapped_rem_addr, |
258 | struct sockaddr_storage *remote_addr, | |
259 | u8 nl_client) | |
6eec1774 TN |
260 | { |
261 | struct hlist_node *tmp_hlist_node; | |
262 | struct hlist_head *hash_bucket_head; | |
263 | struct iwpm_remote_info *rem_info = NULL; | |
264 | unsigned long flags; | |
265 | int ret = -EINVAL; | |
266 | ||
267 | if (!iwpm_valid_client(nl_client)) { | |
268 | pr_info("%s: Invalid client = %d\n", __func__, nl_client); | |
269 | return ret; | |
270 | } | |
271 | spin_lock_irqsave(&iwpm_reminfo_lock, flags); | |
272 | if (iwpm_reminfo_bucket) { | |
273 | hash_bucket_head = get_reminfo_hash_bucket( | |
274 | mapped_loc_addr, | |
275 | mapped_rem_addr); | |
276 | if (!hash_bucket_head) | |
277 | goto get_remote_info_exit; | |
278 | hlist_for_each_entry_safe(rem_info, tmp_hlist_node, | |
279 | hash_bucket_head, hlist_node) { | |
280 | ||
281 | if (!iwpm_compare_sockaddr(&rem_info->mapped_loc_sockaddr, | |
282 | mapped_loc_addr) && | |
283 | !iwpm_compare_sockaddr(&rem_info->mapped_rem_sockaddr, | |
284 | mapped_rem_addr)) { | |
285 | ||
286 | memcpy(remote_addr, &rem_info->remote_sockaddr, | |
287 | sizeof(struct sockaddr_storage)); | |
288 | iwpm_print_sockaddr(remote_addr, | |
289 | "get_remote_info: Remote sockaddr:"); | |
290 | ||
291 | hlist_del_init(&rem_info->hlist_node); | |
292 | kfree(rem_info); | |
293 | ret = 0; | |
294 | break; | |
295 | } | |
296 | } | |
297 | } | |
298 | get_remote_info_exit: | |
299 | spin_unlock_irqrestore(&iwpm_reminfo_lock, flags); | |
300 | return ret; | |
301 | } | |
302 | EXPORT_SYMBOL(iwpm_get_remote_info); | |
303 | ||
30dc5e63 TN |
304 | struct iwpm_nlmsg_request *iwpm_get_nlmsg_request(__u32 nlmsg_seq, |
305 | u8 nl_client, gfp_t gfp) | |
306 | { | |
307 | struct iwpm_nlmsg_request *nlmsg_request = NULL; | |
308 | unsigned long flags; | |
309 | ||
310 | nlmsg_request = kzalloc(sizeof(struct iwpm_nlmsg_request), gfp); | |
311 | if (!nlmsg_request) { | |
312 | pr_err("%s Unable to allocate a nlmsg_request\n", __func__); | |
313 | return NULL; | |
314 | } | |
315 | spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); | |
316 | list_add_tail(&nlmsg_request->inprocess_list, &iwpm_nlmsg_req_list); | |
317 | spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); | |
318 | ||
319 | kref_init(&nlmsg_request->kref); | |
320 | kref_get(&nlmsg_request->kref); | |
321 | nlmsg_request->nlmsg_seq = nlmsg_seq; | |
322 | nlmsg_request->nl_client = nl_client; | |
323 | nlmsg_request->request_done = 0; | |
324 | nlmsg_request->err_code = 0; | |
dafb5587 FL |
325 | sema_init(&nlmsg_request->sem, 1); |
326 | down(&nlmsg_request->sem); | |
30dc5e63 TN |
327 | return nlmsg_request; |
328 | } | |
329 | ||
330 | void iwpm_free_nlmsg_request(struct kref *kref) | |
331 | { | |
332 | struct iwpm_nlmsg_request *nlmsg_request; | |
333 | unsigned long flags; | |
334 | ||
335 | nlmsg_request = container_of(kref, struct iwpm_nlmsg_request, kref); | |
336 | ||
337 | spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); | |
338 | list_del_init(&nlmsg_request->inprocess_list); | |
339 | spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); | |
340 | ||
341 | if (!nlmsg_request->request_done) | |
342 | pr_debug("%s Freeing incomplete nlmsg request (seq = %u).\n", | |
343 | __func__, nlmsg_request->nlmsg_seq); | |
344 | kfree(nlmsg_request); | |
345 | } | |
346 | ||
347 | struct iwpm_nlmsg_request *iwpm_find_nlmsg_request(__u32 echo_seq) | |
348 | { | |
349 | struct iwpm_nlmsg_request *nlmsg_request; | |
350 | struct iwpm_nlmsg_request *found_request = NULL; | |
351 | unsigned long flags; | |
352 | ||
353 | spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); | |
354 | list_for_each_entry(nlmsg_request, &iwpm_nlmsg_req_list, | |
355 | inprocess_list) { | |
356 | if (nlmsg_request->nlmsg_seq == echo_seq) { | |
357 | found_request = nlmsg_request; | |
358 | kref_get(&nlmsg_request->kref); | |
359 | break; | |
360 | } | |
361 | } | |
362 | spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); | |
363 | return found_request; | |
364 | } | |
365 | ||
366 | int iwpm_wait_complete_req(struct iwpm_nlmsg_request *nlmsg_request) | |
367 | { | |
368 | int ret; | |
30dc5e63 | 369 | |
dafb5587 FL |
370 | ret = down_timeout(&nlmsg_request->sem, IWPM_NL_TIMEOUT); |
371 | if (ret) { | |
30dc5e63 TN |
372 | ret = -EINVAL; |
373 | pr_info("%s: Timeout %d sec for netlink request (seq = %u)\n", | |
374 | __func__, (IWPM_NL_TIMEOUT/HZ), nlmsg_request->nlmsg_seq); | |
375 | } else { | |
376 | ret = nlmsg_request->err_code; | |
377 | } | |
378 | kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); | |
379 | return ret; | |
380 | } | |
381 | ||
382 | int iwpm_get_nlmsg_seq(void) | |
383 | { | |
384 | return atomic_inc_return(&iwpm_admin.nlmsg_seq); | |
385 | } | |
386 | ||
387 | int iwpm_valid_client(u8 nl_client) | |
388 | { | |
389 | if (nl_client >= RDMA_NL_NUM_CLIENTS) | |
390 | return 0; | |
391 | return iwpm_admin.client_list[nl_client]; | |
392 | } | |
393 | ||
394 | void iwpm_set_valid(u8 nl_client, int valid) | |
395 | { | |
396 | if (nl_client >= RDMA_NL_NUM_CLIENTS) | |
397 | return; | |
398 | iwpm_admin.client_list[nl_client] = valid; | |
399 | } | |
400 | ||
401 | /* valid client */ | |
a7f2f24c | 402 | u32 iwpm_get_registration(u8 nl_client) |
30dc5e63 TN |
403 | { |
404 | return iwpm_admin.reg_list[nl_client]; | |
405 | } | |
406 | ||
407 | /* valid client */ | |
a7f2f24c | 408 | void iwpm_set_registration(u8 nl_client, u32 reg) |
30dc5e63 TN |
409 | { |
410 | iwpm_admin.reg_list[nl_client] = reg; | |
411 | } | |
412 | ||
a7f2f24c TN |
413 | /* valid client */ |
414 | u32 iwpm_check_registration(u8 nl_client, u32 reg) | |
415 | { | |
416 | return (iwpm_get_registration(nl_client) & reg); | |
417 | } | |
418 | ||
30dc5e63 TN |
419 | int iwpm_compare_sockaddr(struct sockaddr_storage *a_sockaddr, |
420 | struct sockaddr_storage *b_sockaddr) | |
421 | { | |
422 | if (a_sockaddr->ss_family != b_sockaddr->ss_family) | |
423 | return 1; | |
424 | if (a_sockaddr->ss_family == AF_INET) { | |
425 | struct sockaddr_in *a4_sockaddr = | |
426 | (struct sockaddr_in *)a_sockaddr; | |
427 | struct sockaddr_in *b4_sockaddr = | |
428 | (struct sockaddr_in *)b_sockaddr; | |
429 | if (!memcmp(&a4_sockaddr->sin_addr, | |
430 | &b4_sockaddr->sin_addr, sizeof(struct in_addr)) | |
431 | && a4_sockaddr->sin_port == b4_sockaddr->sin_port) | |
432 | return 0; | |
433 | ||
434 | } else if (a_sockaddr->ss_family == AF_INET6) { | |
435 | struct sockaddr_in6 *a6_sockaddr = | |
436 | (struct sockaddr_in6 *)a_sockaddr; | |
437 | struct sockaddr_in6 *b6_sockaddr = | |
438 | (struct sockaddr_in6 *)b_sockaddr; | |
439 | if (!memcmp(&a6_sockaddr->sin6_addr, | |
440 | &b6_sockaddr->sin6_addr, sizeof(struct in6_addr)) | |
441 | && a6_sockaddr->sin6_port == b6_sockaddr->sin6_port) | |
442 | return 0; | |
443 | ||
444 | } else { | |
445 | pr_err("%s: Invalid sockaddr family\n", __func__); | |
446 | } | |
447 | return 1; | |
448 | } | |
449 | ||
450 | struct sk_buff *iwpm_create_nlmsg(u32 nl_op, struct nlmsghdr **nlh, | |
451 | int nl_client) | |
452 | { | |
453 | struct sk_buff *skb = NULL; | |
454 | ||
455 | skb = dev_alloc_skb(NLMSG_GOODSIZE); | |
456 | if (!skb) { | |
457 | pr_err("%s Unable to allocate skb\n", __func__); | |
458 | goto create_nlmsg_exit; | |
459 | } | |
460 | if (!(ibnl_put_msg(skb, nlh, 0, 0, nl_client, nl_op, | |
461 | NLM_F_REQUEST))) { | |
462 | pr_warn("%s: Unable to put the nlmsg header\n", __func__); | |
463 | dev_kfree_skb(skb); | |
464 | skb = NULL; | |
465 | } | |
466 | create_nlmsg_exit: | |
467 | return skb; | |
468 | } | |
469 | ||
470 | int iwpm_parse_nlmsg(struct netlink_callback *cb, int policy_max, | |
471 | const struct nla_policy *nlmsg_policy, | |
472 | struct nlattr *nltb[], const char *msg_type) | |
473 | { | |
474 | int nlh_len = 0; | |
475 | int ret; | |
476 | const char *err_str = ""; | |
477 | ||
478 | ret = nlmsg_validate(cb->nlh, nlh_len, policy_max-1, nlmsg_policy); | |
479 | if (ret) { | |
480 | err_str = "Invalid attribute"; | |
481 | goto parse_nlmsg_error; | |
482 | } | |
483 | ret = nlmsg_parse(cb->nlh, nlh_len, nltb, policy_max-1, nlmsg_policy); | |
484 | if (ret) { | |
485 | err_str = "Unable to parse the nlmsg"; | |
486 | goto parse_nlmsg_error; | |
487 | } | |
488 | ret = iwpm_validate_nlmsg_attr(nltb, policy_max); | |
489 | if (ret) { | |
490 | err_str = "Invalid NULL attribute"; | |
491 | goto parse_nlmsg_error; | |
492 | } | |
493 | return 0; | |
494 | parse_nlmsg_error: | |
495 | pr_warn("%s: %s (msg type %s ret = %d)\n", | |
496 | __func__, err_str, msg_type, ret); | |
497 | return ret; | |
498 | } | |
499 | ||
500 | void iwpm_print_sockaddr(struct sockaddr_storage *sockaddr, char *msg) | |
501 | { | |
502 | struct sockaddr_in6 *sockaddr_v6; | |
503 | struct sockaddr_in *sockaddr_v4; | |
504 | ||
505 | switch (sockaddr->ss_family) { | |
506 | case AF_INET: | |
507 | sockaddr_v4 = (struct sockaddr_in *)sockaddr; | |
508 | pr_debug("%s IPV4 %pI4: %u(0x%04X)\n", | |
509 | msg, &sockaddr_v4->sin_addr, | |
510 | ntohs(sockaddr_v4->sin_port), | |
511 | ntohs(sockaddr_v4->sin_port)); | |
512 | break; | |
513 | case AF_INET6: | |
514 | sockaddr_v6 = (struct sockaddr_in6 *)sockaddr; | |
515 | pr_debug("%s IPV6 %pI6: %u(0x%04X)\n", | |
516 | msg, &sockaddr_v6->sin6_addr, | |
517 | ntohs(sockaddr_v6->sin6_port), | |
518 | ntohs(sockaddr_v6->sin6_port)); | |
519 | break; | |
520 | default: | |
521 | break; | |
522 | } | |
523 | } | |
524 | ||
525 | static u32 iwpm_ipv6_jhash(struct sockaddr_in6 *ipv6_sockaddr) | |
526 | { | |
527 | u32 ipv6_hash = jhash(&ipv6_sockaddr->sin6_addr, sizeof(struct in6_addr), 0); | |
528 | u32 hash = jhash_2words(ipv6_hash, (__force u32) ipv6_sockaddr->sin6_port, 0); | |
529 | return hash; | |
530 | } | |
531 | ||
532 | static u32 iwpm_ipv4_jhash(struct sockaddr_in *ipv4_sockaddr) | |
533 | { | |
534 | u32 ipv4_hash = jhash(&ipv4_sockaddr->sin_addr, sizeof(struct in_addr), 0); | |
535 | u32 hash = jhash_2words(ipv4_hash, (__force u32) ipv4_sockaddr->sin_port, 0); | |
536 | return hash; | |
537 | } | |
538 | ||
6eec1774 TN |
539 | static int get_hash_bucket(struct sockaddr_storage *a_sockaddr, |
540 | struct sockaddr_storage *b_sockaddr, u32 *hash) | |
30dc5e63 | 541 | { |
6eec1774 | 542 | u32 a_hash, b_hash; |
30dc5e63 | 543 | |
6eec1774 TN |
544 | if (a_sockaddr->ss_family == AF_INET) { |
545 | a_hash = iwpm_ipv4_jhash((struct sockaddr_in *) a_sockaddr); | |
546 | b_hash = iwpm_ipv4_jhash((struct sockaddr_in *) b_sockaddr); | |
30dc5e63 | 547 | |
6eec1774 TN |
548 | } else if (a_sockaddr->ss_family == AF_INET6) { |
549 | a_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) a_sockaddr); | |
550 | b_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) b_sockaddr); | |
30dc5e63 TN |
551 | } else { |
552 | pr_err("%s: Invalid sockaddr family\n", __func__); | |
6eec1774 | 553 | return -EINVAL; |
30dc5e63 TN |
554 | } |
555 | ||
6eec1774 TN |
556 | if (a_hash == b_hash) /* if port mapper isn't available */ |
557 | *hash = a_hash; | |
30dc5e63 | 558 | else |
6eec1774 TN |
559 | *hash = jhash_2words(a_hash, b_hash, 0); |
560 | return 0; | |
561 | } | |
562 | ||
563 | static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage | |
564 | *local_sockaddr, struct sockaddr_storage | |
565 | *mapped_sockaddr) | |
566 | { | |
567 | u32 hash; | |
568 | int ret; | |
30dc5e63 | 569 | |
6eec1774 TN |
570 | ret = get_hash_bucket(local_sockaddr, mapped_sockaddr, &hash); |
571 | if (ret) | |
572 | return NULL; | |
573 | return &iwpm_hash_bucket[hash & IWPM_MAPINFO_HASH_MASK]; | |
574 | } | |
575 | ||
576 | static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage | |
577 | *mapped_loc_sockaddr, struct sockaddr_storage | |
578 | *mapped_rem_sockaddr) | |
579 | { | |
580 | u32 hash; | |
581 | int ret; | |
582 | ||
583 | ret = get_hash_bucket(mapped_loc_sockaddr, mapped_rem_sockaddr, &hash); | |
584 | if (ret) | |
585 | return NULL; | |
586 | return &iwpm_reminfo_bucket[hash & IWPM_REMINFO_HASH_MASK]; | |
30dc5e63 TN |
587 | } |
588 | ||
589 | static int send_mapinfo_num(u32 mapping_num, u8 nl_client, int iwpm_pid) | |
590 | { | |
591 | struct sk_buff *skb = NULL; | |
592 | struct nlmsghdr *nlh; | |
593 | u32 msg_seq; | |
594 | const char *err_str = ""; | |
595 | int ret = -EINVAL; | |
596 | ||
597 | skb = iwpm_create_nlmsg(RDMA_NL_IWPM_MAPINFO_NUM, &nlh, nl_client); | |
598 | if (!skb) { | |
599 | err_str = "Unable to create a nlmsg"; | |
600 | goto mapinfo_num_error; | |
601 | } | |
602 | nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); | |
603 | msg_seq = 0; | |
604 | err_str = "Unable to put attribute of mapinfo number nlmsg"; | |
605 | ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_MAPINFO_SEQ); | |
606 | if (ret) | |
607 | goto mapinfo_num_error; | |
608 | ret = ibnl_put_attr(skb, nlh, sizeof(u32), | |
609 | &mapping_num, IWPM_NLA_MAPINFO_SEND_NUM); | |
610 | if (ret) | |
611 | goto mapinfo_num_error; | |
612 | ret = ibnl_unicast(skb, nlh, iwpm_pid); | |
613 | if (ret) { | |
614 | skb = NULL; | |
615 | err_str = "Unable to send a nlmsg"; | |
616 | goto mapinfo_num_error; | |
617 | } | |
618 | pr_debug("%s: Sent mapping number = %d\n", __func__, mapping_num); | |
619 | return 0; | |
620 | mapinfo_num_error: | |
621 | pr_info("%s: %s\n", __func__, err_str); | |
622 | if (skb) | |
623 | dev_kfree_skb(skb); | |
624 | return ret; | |
625 | } | |
626 | ||
627 | static int send_nlmsg_done(struct sk_buff *skb, u8 nl_client, int iwpm_pid) | |
628 | { | |
629 | struct nlmsghdr *nlh = NULL; | |
630 | int ret = 0; | |
631 | ||
632 | if (!skb) | |
633 | return ret; | |
634 | if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client, | |
635 | RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) { | |
636 | pr_warn("%s Unable to put NLMSG_DONE\n", __func__); | |
5ed935e8 | 637 | dev_kfree_skb(skb); |
30dc5e63 TN |
638 | return -ENOMEM; |
639 | } | |
640 | nlh->nlmsg_type = NLMSG_DONE; | |
641 | ret = ibnl_unicast(skb, (struct nlmsghdr *)skb->data, iwpm_pid); | |
642 | if (ret) | |
643 | pr_warn("%s Unable to send a nlmsg\n", __func__); | |
644 | return ret; | |
645 | } | |
646 | ||
647 | int iwpm_send_mapinfo(u8 nl_client, int iwpm_pid) | |
648 | { | |
649 | struct iwpm_mapping_info *map_info; | |
650 | struct sk_buff *skb = NULL; | |
651 | struct nlmsghdr *nlh; | |
652 | int skb_num = 0, mapping_num = 0; | |
653 | int i = 0, nlmsg_bytes = 0; | |
654 | unsigned long flags; | |
655 | const char *err_str = ""; | |
656 | int ret; | |
657 | ||
658 | skb = dev_alloc_skb(NLMSG_GOODSIZE); | |
659 | if (!skb) { | |
660 | ret = -ENOMEM; | |
661 | err_str = "Unable to allocate skb"; | |
662 | goto send_mapping_info_exit; | |
663 | } | |
664 | skb_num++; | |
665 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
6eec1774 | 666 | for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) { |
30dc5e63 TN |
667 | hlist_for_each_entry(map_info, &iwpm_hash_bucket[i], |
668 | hlist_node) { | |
669 | if (map_info->nl_client != nl_client) | |
670 | continue; | |
671 | nlh = NULL; | |
672 | if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client, | |
673 | RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) { | |
674 | ret = -ENOMEM; | |
675 | err_str = "Unable to put the nlmsg header"; | |
676 | goto send_mapping_info_unlock; | |
677 | } | |
678 | err_str = "Unable to put attribute of the nlmsg"; | |
679 | ret = ibnl_put_attr(skb, nlh, | |
680 | sizeof(struct sockaddr_storage), | |
681 | &map_info->local_sockaddr, | |
682 | IWPM_NLA_MAPINFO_LOCAL_ADDR); | |
683 | if (ret) | |
684 | goto send_mapping_info_unlock; | |
685 | ||
686 | ret = ibnl_put_attr(skb, nlh, | |
687 | sizeof(struct sockaddr_storage), | |
688 | &map_info->mapped_sockaddr, | |
689 | IWPM_NLA_MAPINFO_MAPPED_ADDR); | |
690 | if (ret) | |
691 | goto send_mapping_info_unlock; | |
692 | ||
693 | iwpm_print_sockaddr(&map_info->local_sockaddr, | |
694 | "send_mapping_info: Local sockaddr:"); | |
695 | iwpm_print_sockaddr(&map_info->mapped_sockaddr, | |
696 | "send_mapping_info: Mapped local sockaddr:"); | |
697 | mapping_num++; | |
698 | nlmsg_bytes += nlh->nlmsg_len; | |
699 | ||
700 | /* check if all mappings can fit in one skb */ | |
701 | if (NLMSG_GOODSIZE - nlmsg_bytes < nlh->nlmsg_len * 2) { | |
702 | /* and leave room for NLMSG_DONE */ | |
703 | nlmsg_bytes = 0; | |
704 | skb_num++; | |
705 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, | |
706 | flags); | |
707 | /* send the skb */ | |
708 | ret = send_nlmsg_done(skb, nl_client, iwpm_pid); | |
709 | skb = NULL; | |
710 | if (ret) { | |
711 | err_str = "Unable to send map info"; | |
712 | goto send_mapping_info_exit; | |
713 | } | |
714 | if (skb_num == IWPM_MAPINFO_SKB_COUNT) { | |
715 | ret = -ENOMEM; | |
716 | err_str = "Insufficient skbs for map info"; | |
717 | goto send_mapping_info_exit; | |
718 | } | |
719 | skb = dev_alloc_skb(NLMSG_GOODSIZE); | |
720 | if (!skb) { | |
721 | ret = -ENOMEM; | |
722 | err_str = "Unable to allocate skb"; | |
723 | goto send_mapping_info_exit; | |
724 | } | |
725 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
726 | } | |
727 | } | |
728 | } | |
729 | send_mapping_info_unlock: | |
730 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
731 | send_mapping_info_exit: | |
732 | if (ret) { | |
733 | pr_warn("%s: %s (ret = %d)\n", __func__, err_str, ret); | |
734 | if (skb) | |
735 | dev_kfree_skb(skb); | |
736 | return ret; | |
737 | } | |
738 | send_nlmsg_done(skb, nl_client, iwpm_pid); | |
739 | return send_mapinfo_num(mapping_num, nl_client, iwpm_pid); | |
740 | } | |
741 | ||
742 | int iwpm_mapinfo_available(void) | |
743 | { | |
744 | unsigned long flags; | |
745 | int full_bucket = 0, i = 0; | |
746 | ||
747 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
748 | if (iwpm_hash_bucket) { | |
6eec1774 | 749 | for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) { |
30dc5e63 TN |
750 | if (!hlist_empty(&iwpm_hash_bucket[i])) { |
751 | full_bucket = 1; | |
752 | break; | |
753 | } | |
754 | } | |
755 | } | |
756 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
757 | return full_bucket; | |
758 | } |