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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) | |
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 | mutex_lock(&iwpm_admin_lock); |
58 | if (atomic_read(&iwpm_admin.refcount) == 0) { | |
6eec1774 | 59 | iwpm_hash_bucket = kzalloc(IWPM_MAPINFO_HASH_SIZE * |
30dc5e63 TN |
60 | sizeof(struct hlist_head), GFP_KERNEL); |
61 | if (!iwpm_hash_bucket) { | |
6eec1774 | 62 | ret = -ENOMEM; |
6eec1774 TN |
63 | goto init_exit; |
64 | } | |
65 | iwpm_reminfo_bucket = kzalloc(IWPM_REMINFO_HASH_SIZE * | |
66 | sizeof(struct hlist_head), GFP_KERNEL); | |
67 | if (!iwpm_reminfo_bucket) { | |
68 | kfree(iwpm_hash_bucket); | |
69 | ret = -ENOMEM; | |
6eec1774 | 70 | goto init_exit; |
30dc5e63 TN |
71 | } |
72 | } | |
73 | atomic_inc(&iwpm_admin.refcount); | |
6eec1774 | 74 | init_exit: |
30dc5e63 | 75 | mutex_unlock(&iwpm_admin_lock); |
6eec1774 TN |
76 | if (!ret) { |
77 | iwpm_set_valid(nl_client, 1); | |
a7f2f24c | 78 | iwpm_set_registration(nl_client, IWPM_REG_UNDEF); |
6eec1774 TN |
79 | pr_debug("%s: Mapinfo and reminfo tables are created\n", |
80 | __func__); | |
81 | } | |
82 | return ret; | |
30dc5e63 | 83 | } |
30dc5e63 TN |
84 | |
85 | static void free_hash_bucket(void); | |
6eec1774 | 86 | static void free_reminfo_bucket(void); |
30dc5e63 TN |
87 | |
88 | int iwpm_exit(u8 nl_client) | |
89 | { | |
90 | ||
91 | if (!iwpm_valid_client(nl_client)) | |
92 | return -EINVAL; | |
93 | mutex_lock(&iwpm_admin_lock); | |
94 | if (atomic_read(&iwpm_admin.refcount) == 0) { | |
95 | mutex_unlock(&iwpm_admin_lock); | |
96 | pr_err("%s Incorrect usage - negative refcount\n", __func__); | |
97 | return -EINVAL; | |
98 | } | |
99 | if (atomic_dec_and_test(&iwpm_admin.refcount)) { | |
100 | free_hash_bucket(); | |
6eec1774 TN |
101 | free_reminfo_bucket(); |
102 | pr_debug("%s: Resources are destroyed\n", __func__); | |
30dc5e63 TN |
103 | } |
104 | mutex_unlock(&iwpm_admin_lock); | |
105 | iwpm_set_valid(nl_client, 0); | |
a7f2f24c | 106 | iwpm_set_registration(nl_client, IWPM_REG_UNDEF); |
30dc5e63 TN |
107 | return 0; |
108 | } | |
30dc5e63 | 109 | |
6eec1774 | 110 | static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage *, |
30dc5e63 TN |
111 | struct sockaddr_storage *); |
112 | ||
113 | int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr, | |
114 | struct sockaddr_storage *mapped_sockaddr, | |
115 | u8 nl_client) | |
116 | { | |
117 | struct hlist_head *hash_bucket_head; | |
118 | struct iwpm_mapping_info *map_info; | |
119 | unsigned long flags; | |
6eec1774 | 120 | int ret = -EINVAL; |
30dc5e63 TN |
121 | |
122 | if (!iwpm_valid_client(nl_client)) | |
6eec1774 | 123 | return ret; |
30dc5e63 | 124 | map_info = kzalloc(sizeof(struct iwpm_mapping_info), GFP_KERNEL); |
a0b3455f | 125 | if (!map_info) |
30dc5e63 | 126 | return -ENOMEM; |
a0b3455f | 127 | |
30dc5e63 TN |
128 | memcpy(&map_info->local_sockaddr, local_sockaddr, |
129 | sizeof(struct sockaddr_storage)); | |
130 | memcpy(&map_info->mapped_sockaddr, mapped_sockaddr, | |
131 | sizeof(struct sockaddr_storage)); | |
132 | map_info->nl_client = nl_client; | |
133 | ||
134 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
135 | if (iwpm_hash_bucket) { | |
6eec1774 | 136 | hash_bucket_head = get_mapinfo_hash_bucket( |
30dc5e63 TN |
137 | &map_info->local_sockaddr, |
138 | &map_info->mapped_sockaddr); | |
6eec1774 TN |
139 | if (hash_bucket_head) { |
140 | hlist_add_head(&map_info->hlist_node, hash_bucket_head); | |
141 | ret = 0; | |
142 | } | |
30dc5e63 TN |
143 | } |
144 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
6eec1774 | 145 | return ret; |
30dc5e63 | 146 | } |
30dc5e63 TN |
147 | |
148 | int iwpm_remove_mapinfo(struct sockaddr_storage *local_sockaddr, | |
149 | struct sockaddr_storage *mapped_local_addr) | |
150 | { | |
151 | struct hlist_node *tmp_hlist_node; | |
152 | struct hlist_head *hash_bucket_head; | |
153 | struct iwpm_mapping_info *map_info = NULL; | |
154 | unsigned long flags; | |
155 | int ret = -EINVAL; | |
156 | ||
157 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
158 | if (iwpm_hash_bucket) { | |
6eec1774 | 159 | hash_bucket_head = get_mapinfo_hash_bucket( |
30dc5e63 TN |
160 | local_sockaddr, |
161 | mapped_local_addr); | |
6eec1774 TN |
162 | if (!hash_bucket_head) |
163 | goto remove_mapinfo_exit; | |
164 | ||
30dc5e63 TN |
165 | hlist_for_each_entry_safe(map_info, tmp_hlist_node, |
166 | hash_bucket_head, hlist_node) { | |
167 | ||
168 | if (!iwpm_compare_sockaddr(&map_info->mapped_sockaddr, | |
169 | mapped_local_addr)) { | |
170 | ||
171 | hlist_del_init(&map_info->hlist_node); | |
172 | kfree(map_info); | |
173 | ret = 0; | |
174 | break; | |
175 | } | |
176 | } | |
177 | } | |
6eec1774 | 178 | remove_mapinfo_exit: |
30dc5e63 TN |
179 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); |
180 | return ret; | |
181 | } | |
30dc5e63 TN |
182 | |
183 | static void free_hash_bucket(void) | |
184 | { | |
185 | struct hlist_node *tmp_hlist_node; | |
186 | struct iwpm_mapping_info *map_info; | |
187 | unsigned long flags; | |
188 | int i; | |
189 | ||
190 | /* remove all the mapinfo data from the list */ | |
191 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
6eec1774 | 192 | for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) { |
30dc5e63 TN |
193 | hlist_for_each_entry_safe(map_info, tmp_hlist_node, |
194 | &iwpm_hash_bucket[i], hlist_node) { | |
195 | ||
196 | hlist_del_init(&map_info->hlist_node); | |
197 | kfree(map_info); | |
198 | } | |
199 | } | |
200 | /* free the hash list */ | |
201 | kfree(iwpm_hash_bucket); | |
202 | iwpm_hash_bucket = NULL; | |
203 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
204 | } | |
205 | ||
6eec1774 TN |
206 | static void free_reminfo_bucket(void) |
207 | { | |
208 | struct hlist_node *tmp_hlist_node; | |
209 | struct iwpm_remote_info *rem_info; | |
210 | unsigned long flags; | |
211 | int i; | |
212 | ||
213 | /* remove all the remote info from the list */ | |
214 | spin_lock_irqsave(&iwpm_reminfo_lock, flags); | |
215 | for (i = 0; i < IWPM_REMINFO_HASH_SIZE; i++) { | |
216 | hlist_for_each_entry_safe(rem_info, tmp_hlist_node, | |
217 | &iwpm_reminfo_bucket[i], hlist_node) { | |
218 | ||
219 | hlist_del_init(&rem_info->hlist_node); | |
220 | kfree(rem_info); | |
221 | } | |
222 | } | |
223 | /* free the hash list */ | |
224 | kfree(iwpm_reminfo_bucket); | |
225 | iwpm_reminfo_bucket = NULL; | |
226 | spin_unlock_irqrestore(&iwpm_reminfo_lock, flags); | |
227 | } | |
228 | ||
229 | static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage *, | |
230 | struct sockaddr_storage *); | |
231 | ||
232 | void iwpm_add_remote_info(struct iwpm_remote_info *rem_info) | |
233 | { | |
234 | struct hlist_head *hash_bucket_head; | |
235 | unsigned long flags; | |
236 | ||
237 | spin_lock_irqsave(&iwpm_reminfo_lock, flags); | |
238 | if (iwpm_reminfo_bucket) { | |
239 | hash_bucket_head = get_reminfo_hash_bucket( | |
240 | &rem_info->mapped_loc_sockaddr, | |
241 | &rem_info->mapped_rem_sockaddr); | |
242 | if (hash_bucket_head) | |
243 | hlist_add_head(&rem_info->hlist_node, hash_bucket_head); | |
244 | } | |
245 | spin_unlock_irqrestore(&iwpm_reminfo_lock, flags); | |
246 | } | |
247 | ||
248 | int iwpm_get_remote_info(struct sockaddr_storage *mapped_loc_addr, | |
dafb5587 FL |
249 | struct sockaddr_storage *mapped_rem_addr, |
250 | struct sockaddr_storage *remote_addr, | |
251 | u8 nl_client) | |
6eec1774 TN |
252 | { |
253 | struct hlist_node *tmp_hlist_node; | |
254 | struct hlist_head *hash_bucket_head; | |
255 | struct iwpm_remote_info *rem_info = NULL; | |
256 | unsigned long flags; | |
257 | int ret = -EINVAL; | |
258 | ||
259 | if (!iwpm_valid_client(nl_client)) { | |
260 | pr_info("%s: Invalid client = %d\n", __func__, nl_client); | |
261 | return ret; | |
262 | } | |
263 | spin_lock_irqsave(&iwpm_reminfo_lock, flags); | |
264 | if (iwpm_reminfo_bucket) { | |
265 | hash_bucket_head = get_reminfo_hash_bucket( | |
266 | mapped_loc_addr, | |
267 | mapped_rem_addr); | |
268 | if (!hash_bucket_head) | |
269 | goto get_remote_info_exit; | |
270 | hlist_for_each_entry_safe(rem_info, tmp_hlist_node, | |
271 | hash_bucket_head, hlist_node) { | |
272 | ||
273 | if (!iwpm_compare_sockaddr(&rem_info->mapped_loc_sockaddr, | |
274 | mapped_loc_addr) && | |
275 | !iwpm_compare_sockaddr(&rem_info->mapped_rem_sockaddr, | |
276 | mapped_rem_addr)) { | |
277 | ||
278 | memcpy(remote_addr, &rem_info->remote_sockaddr, | |
279 | sizeof(struct sockaddr_storage)); | |
280 | iwpm_print_sockaddr(remote_addr, | |
281 | "get_remote_info: Remote sockaddr:"); | |
282 | ||
283 | hlist_del_init(&rem_info->hlist_node); | |
284 | kfree(rem_info); | |
285 | ret = 0; | |
286 | break; | |
287 | } | |
288 | } | |
289 | } | |
290 | get_remote_info_exit: | |
291 | spin_unlock_irqrestore(&iwpm_reminfo_lock, flags); | |
292 | return ret; | |
293 | } | |
6eec1774 | 294 | |
30dc5e63 TN |
295 | struct iwpm_nlmsg_request *iwpm_get_nlmsg_request(__u32 nlmsg_seq, |
296 | u8 nl_client, gfp_t gfp) | |
297 | { | |
298 | struct iwpm_nlmsg_request *nlmsg_request = NULL; | |
299 | unsigned long flags; | |
300 | ||
301 | nlmsg_request = kzalloc(sizeof(struct iwpm_nlmsg_request), gfp); | |
a0b3455f | 302 | if (!nlmsg_request) |
30dc5e63 | 303 | return NULL; |
a0b3455f | 304 | |
30dc5e63 TN |
305 | spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); |
306 | list_add_tail(&nlmsg_request->inprocess_list, &iwpm_nlmsg_req_list); | |
307 | spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); | |
308 | ||
309 | kref_init(&nlmsg_request->kref); | |
310 | kref_get(&nlmsg_request->kref); | |
311 | nlmsg_request->nlmsg_seq = nlmsg_seq; | |
312 | nlmsg_request->nl_client = nl_client; | |
313 | nlmsg_request->request_done = 0; | |
314 | nlmsg_request->err_code = 0; | |
dafb5587 FL |
315 | sema_init(&nlmsg_request->sem, 1); |
316 | down(&nlmsg_request->sem); | |
30dc5e63 TN |
317 | return nlmsg_request; |
318 | } | |
319 | ||
320 | void iwpm_free_nlmsg_request(struct kref *kref) | |
321 | { | |
322 | struct iwpm_nlmsg_request *nlmsg_request; | |
323 | unsigned long flags; | |
324 | ||
325 | nlmsg_request = container_of(kref, struct iwpm_nlmsg_request, kref); | |
326 | ||
327 | spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); | |
328 | list_del_init(&nlmsg_request->inprocess_list); | |
329 | spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); | |
330 | ||
331 | if (!nlmsg_request->request_done) | |
332 | pr_debug("%s Freeing incomplete nlmsg request (seq = %u).\n", | |
333 | __func__, nlmsg_request->nlmsg_seq); | |
334 | kfree(nlmsg_request); | |
335 | } | |
336 | ||
337 | struct iwpm_nlmsg_request *iwpm_find_nlmsg_request(__u32 echo_seq) | |
338 | { | |
339 | struct iwpm_nlmsg_request *nlmsg_request; | |
340 | struct iwpm_nlmsg_request *found_request = NULL; | |
341 | unsigned long flags; | |
342 | ||
343 | spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); | |
344 | list_for_each_entry(nlmsg_request, &iwpm_nlmsg_req_list, | |
345 | inprocess_list) { | |
346 | if (nlmsg_request->nlmsg_seq == echo_seq) { | |
347 | found_request = nlmsg_request; | |
348 | kref_get(&nlmsg_request->kref); | |
349 | break; | |
350 | } | |
351 | } | |
352 | spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); | |
353 | return found_request; | |
354 | } | |
355 | ||
356 | int iwpm_wait_complete_req(struct iwpm_nlmsg_request *nlmsg_request) | |
357 | { | |
358 | int ret; | |
30dc5e63 | 359 | |
dafb5587 FL |
360 | ret = down_timeout(&nlmsg_request->sem, IWPM_NL_TIMEOUT); |
361 | if (ret) { | |
30dc5e63 TN |
362 | ret = -EINVAL; |
363 | pr_info("%s: Timeout %d sec for netlink request (seq = %u)\n", | |
364 | __func__, (IWPM_NL_TIMEOUT/HZ), nlmsg_request->nlmsg_seq); | |
365 | } else { | |
366 | ret = nlmsg_request->err_code; | |
367 | } | |
368 | kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); | |
369 | return ret; | |
370 | } | |
371 | ||
372 | int iwpm_get_nlmsg_seq(void) | |
373 | { | |
374 | return atomic_inc_return(&iwpm_admin.nlmsg_seq); | |
375 | } | |
376 | ||
377 | int iwpm_valid_client(u8 nl_client) | |
378 | { | |
30dc5e63 TN |
379 | return iwpm_admin.client_list[nl_client]; |
380 | } | |
381 | ||
382 | void iwpm_set_valid(u8 nl_client, int valid) | |
383 | { | |
30dc5e63 TN |
384 | iwpm_admin.client_list[nl_client] = valid; |
385 | } | |
386 | ||
387 | /* valid client */ | |
a7f2f24c | 388 | u32 iwpm_get_registration(u8 nl_client) |
30dc5e63 TN |
389 | { |
390 | return iwpm_admin.reg_list[nl_client]; | |
391 | } | |
392 | ||
393 | /* valid client */ | |
a7f2f24c | 394 | void iwpm_set_registration(u8 nl_client, u32 reg) |
30dc5e63 TN |
395 | { |
396 | iwpm_admin.reg_list[nl_client] = reg; | |
397 | } | |
398 | ||
a7f2f24c TN |
399 | /* valid client */ |
400 | u32 iwpm_check_registration(u8 nl_client, u32 reg) | |
401 | { | |
402 | return (iwpm_get_registration(nl_client) & reg); | |
403 | } | |
404 | ||
30dc5e63 TN |
405 | int iwpm_compare_sockaddr(struct sockaddr_storage *a_sockaddr, |
406 | struct sockaddr_storage *b_sockaddr) | |
407 | { | |
408 | if (a_sockaddr->ss_family != b_sockaddr->ss_family) | |
409 | return 1; | |
410 | if (a_sockaddr->ss_family == AF_INET) { | |
411 | struct sockaddr_in *a4_sockaddr = | |
412 | (struct sockaddr_in *)a_sockaddr; | |
413 | struct sockaddr_in *b4_sockaddr = | |
414 | (struct sockaddr_in *)b_sockaddr; | |
415 | if (!memcmp(&a4_sockaddr->sin_addr, | |
416 | &b4_sockaddr->sin_addr, sizeof(struct in_addr)) | |
417 | && a4_sockaddr->sin_port == b4_sockaddr->sin_port) | |
418 | return 0; | |
419 | ||
420 | } else if (a_sockaddr->ss_family == AF_INET6) { | |
421 | struct sockaddr_in6 *a6_sockaddr = | |
422 | (struct sockaddr_in6 *)a_sockaddr; | |
423 | struct sockaddr_in6 *b6_sockaddr = | |
424 | (struct sockaddr_in6 *)b_sockaddr; | |
425 | if (!memcmp(&a6_sockaddr->sin6_addr, | |
426 | &b6_sockaddr->sin6_addr, sizeof(struct in6_addr)) | |
427 | && a6_sockaddr->sin6_port == b6_sockaddr->sin6_port) | |
428 | return 0; | |
429 | ||
430 | } else { | |
431 | pr_err("%s: Invalid sockaddr family\n", __func__); | |
432 | } | |
433 | return 1; | |
434 | } | |
435 | ||
436 | struct sk_buff *iwpm_create_nlmsg(u32 nl_op, struct nlmsghdr **nlh, | |
437 | int nl_client) | |
438 | { | |
439 | struct sk_buff *skb = NULL; | |
440 | ||
e972dabf | 441 | skb = dev_alloc_skb(IWPM_MSG_SIZE); |
30dc5e63 TN |
442 | if (!skb) { |
443 | pr_err("%s Unable to allocate skb\n", __func__); | |
444 | goto create_nlmsg_exit; | |
445 | } | |
446 | if (!(ibnl_put_msg(skb, nlh, 0, 0, nl_client, nl_op, | |
447 | NLM_F_REQUEST))) { | |
448 | pr_warn("%s: Unable to put the nlmsg header\n", __func__); | |
449 | dev_kfree_skb(skb); | |
450 | skb = NULL; | |
451 | } | |
452 | create_nlmsg_exit: | |
453 | return skb; | |
454 | } | |
455 | ||
456 | int iwpm_parse_nlmsg(struct netlink_callback *cb, int policy_max, | |
457 | const struct nla_policy *nlmsg_policy, | |
458 | struct nlattr *nltb[], const char *msg_type) | |
459 | { | |
460 | int nlh_len = 0; | |
461 | int ret; | |
462 | const char *err_str = ""; | |
463 | ||
fceb6435 JB |
464 | ret = nlmsg_validate(cb->nlh, nlh_len, policy_max - 1, nlmsg_policy, |
465 | NULL); | |
30dc5e63 TN |
466 | if (ret) { |
467 | err_str = "Invalid attribute"; | |
468 | goto parse_nlmsg_error; | |
469 | } | |
fceb6435 JB |
470 | ret = nlmsg_parse(cb->nlh, nlh_len, nltb, policy_max - 1, |
471 | nlmsg_policy, NULL); | |
30dc5e63 TN |
472 | if (ret) { |
473 | err_str = "Unable to parse the nlmsg"; | |
474 | goto parse_nlmsg_error; | |
475 | } | |
476 | ret = iwpm_validate_nlmsg_attr(nltb, policy_max); | |
477 | if (ret) { | |
478 | err_str = "Invalid NULL attribute"; | |
479 | goto parse_nlmsg_error; | |
480 | } | |
481 | return 0; | |
482 | parse_nlmsg_error: | |
483 | pr_warn("%s: %s (msg type %s ret = %d)\n", | |
484 | __func__, err_str, msg_type, ret); | |
485 | return ret; | |
486 | } | |
487 | ||
488 | void iwpm_print_sockaddr(struct sockaddr_storage *sockaddr, char *msg) | |
489 | { | |
490 | struct sockaddr_in6 *sockaddr_v6; | |
491 | struct sockaddr_in *sockaddr_v4; | |
492 | ||
493 | switch (sockaddr->ss_family) { | |
494 | case AF_INET: | |
495 | sockaddr_v4 = (struct sockaddr_in *)sockaddr; | |
496 | pr_debug("%s IPV4 %pI4: %u(0x%04X)\n", | |
497 | msg, &sockaddr_v4->sin_addr, | |
498 | ntohs(sockaddr_v4->sin_port), | |
499 | ntohs(sockaddr_v4->sin_port)); | |
500 | break; | |
501 | case AF_INET6: | |
502 | sockaddr_v6 = (struct sockaddr_in6 *)sockaddr; | |
503 | pr_debug("%s IPV6 %pI6: %u(0x%04X)\n", | |
504 | msg, &sockaddr_v6->sin6_addr, | |
505 | ntohs(sockaddr_v6->sin6_port), | |
506 | ntohs(sockaddr_v6->sin6_port)); | |
507 | break; | |
508 | default: | |
509 | break; | |
510 | } | |
511 | } | |
512 | ||
513 | static u32 iwpm_ipv6_jhash(struct sockaddr_in6 *ipv6_sockaddr) | |
514 | { | |
515 | u32 ipv6_hash = jhash(&ipv6_sockaddr->sin6_addr, sizeof(struct in6_addr), 0); | |
516 | u32 hash = jhash_2words(ipv6_hash, (__force u32) ipv6_sockaddr->sin6_port, 0); | |
517 | return hash; | |
518 | } | |
519 | ||
520 | static u32 iwpm_ipv4_jhash(struct sockaddr_in *ipv4_sockaddr) | |
521 | { | |
522 | u32 ipv4_hash = jhash(&ipv4_sockaddr->sin_addr, sizeof(struct in_addr), 0); | |
523 | u32 hash = jhash_2words(ipv4_hash, (__force u32) ipv4_sockaddr->sin_port, 0); | |
524 | return hash; | |
525 | } | |
526 | ||
6eec1774 TN |
527 | static int get_hash_bucket(struct sockaddr_storage *a_sockaddr, |
528 | struct sockaddr_storage *b_sockaddr, u32 *hash) | |
30dc5e63 | 529 | { |
6eec1774 | 530 | u32 a_hash, b_hash; |
30dc5e63 | 531 | |
6eec1774 TN |
532 | if (a_sockaddr->ss_family == AF_INET) { |
533 | a_hash = iwpm_ipv4_jhash((struct sockaddr_in *) a_sockaddr); | |
534 | b_hash = iwpm_ipv4_jhash((struct sockaddr_in *) b_sockaddr); | |
30dc5e63 | 535 | |
6eec1774 TN |
536 | } else if (a_sockaddr->ss_family == AF_INET6) { |
537 | a_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) a_sockaddr); | |
538 | b_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) b_sockaddr); | |
30dc5e63 TN |
539 | } else { |
540 | pr_err("%s: Invalid sockaddr family\n", __func__); | |
6eec1774 | 541 | return -EINVAL; |
30dc5e63 TN |
542 | } |
543 | ||
6eec1774 TN |
544 | if (a_hash == b_hash) /* if port mapper isn't available */ |
545 | *hash = a_hash; | |
30dc5e63 | 546 | else |
6eec1774 TN |
547 | *hash = jhash_2words(a_hash, b_hash, 0); |
548 | return 0; | |
549 | } | |
550 | ||
551 | static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage | |
552 | *local_sockaddr, struct sockaddr_storage | |
553 | *mapped_sockaddr) | |
554 | { | |
555 | u32 hash; | |
556 | int ret; | |
30dc5e63 | 557 | |
6eec1774 TN |
558 | ret = get_hash_bucket(local_sockaddr, mapped_sockaddr, &hash); |
559 | if (ret) | |
560 | return NULL; | |
561 | return &iwpm_hash_bucket[hash & IWPM_MAPINFO_HASH_MASK]; | |
562 | } | |
563 | ||
564 | static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage | |
565 | *mapped_loc_sockaddr, struct sockaddr_storage | |
566 | *mapped_rem_sockaddr) | |
567 | { | |
568 | u32 hash; | |
569 | int ret; | |
570 | ||
571 | ret = get_hash_bucket(mapped_loc_sockaddr, mapped_rem_sockaddr, &hash); | |
572 | if (ret) | |
573 | return NULL; | |
574 | return &iwpm_reminfo_bucket[hash & IWPM_REMINFO_HASH_MASK]; | |
30dc5e63 TN |
575 | } |
576 | ||
577 | static int send_mapinfo_num(u32 mapping_num, u8 nl_client, int iwpm_pid) | |
578 | { | |
579 | struct sk_buff *skb = NULL; | |
580 | struct nlmsghdr *nlh; | |
581 | u32 msg_seq; | |
582 | const char *err_str = ""; | |
583 | int ret = -EINVAL; | |
584 | ||
585 | skb = iwpm_create_nlmsg(RDMA_NL_IWPM_MAPINFO_NUM, &nlh, nl_client); | |
586 | if (!skb) { | |
587 | err_str = "Unable to create a nlmsg"; | |
588 | goto mapinfo_num_error; | |
589 | } | |
590 | nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); | |
591 | msg_seq = 0; | |
592 | err_str = "Unable to put attribute of mapinfo number nlmsg"; | |
593 | ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_MAPINFO_SEQ); | |
594 | if (ret) | |
595 | goto mapinfo_num_error; | |
596 | ret = ibnl_put_attr(skb, nlh, sizeof(u32), | |
597 | &mapping_num, IWPM_NLA_MAPINFO_SEND_NUM); | |
598 | if (ret) | |
599 | goto mapinfo_num_error; | |
04eae427 SS |
600 | |
601 | nlmsg_end(skb, nlh); | |
602 | ||
f00e6463 | 603 | ret = rdma_nl_unicast(skb, iwpm_pid); |
30dc5e63 TN |
604 | if (ret) { |
605 | skb = NULL; | |
606 | err_str = "Unable to send a nlmsg"; | |
607 | goto mapinfo_num_error; | |
608 | } | |
609 | pr_debug("%s: Sent mapping number = %d\n", __func__, mapping_num); | |
610 | return 0; | |
611 | mapinfo_num_error: | |
612 | pr_info("%s: %s\n", __func__, err_str); | |
613 | if (skb) | |
614 | dev_kfree_skb(skb); | |
615 | return ret; | |
616 | } | |
617 | ||
618 | static int send_nlmsg_done(struct sk_buff *skb, u8 nl_client, int iwpm_pid) | |
619 | { | |
620 | struct nlmsghdr *nlh = NULL; | |
621 | int ret = 0; | |
622 | ||
623 | if (!skb) | |
624 | return ret; | |
625 | if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client, | |
626 | RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) { | |
627 | pr_warn("%s Unable to put NLMSG_DONE\n", __func__); | |
5ed935e8 | 628 | dev_kfree_skb(skb); |
30dc5e63 TN |
629 | return -ENOMEM; |
630 | } | |
631 | nlh->nlmsg_type = NLMSG_DONE; | |
f00e6463 | 632 | ret = rdma_nl_unicast(skb, iwpm_pid); |
30dc5e63 TN |
633 | if (ret) |
634 | pr_warn("%s Unable to send a nlmsg\n", __func__); | |
635 | return ret; | |
636 | } | |
637 | ||
638 | int iwpm_send_mapinfo(u8 nl_client, int iwpm_pid) | |
639 | { | |
640 | struct iwpm_mapping_info *map_info; | |
641 | struct sk_buff *skb = NULL; | |
642 | struct nlmsghdr *nlh; | |
643 | int skb_num = 0, mapping_num = 0; | |
644 | int i = 0, nlmsg_bytes = 0; | |
645 | unsigned long flags; | |
646 | const char *err_str = ""; | |
647 | int ret; | |
648 | ||
649 | skb = dev_alloc_skb(NLMSG_GOODSIZE); | |
650 | if (!skb) { | |
651 | ret = -ENOMEM; | |
652 | err_str = "Unable to allocate skb"; | |
653 | goto send_mapping_info_exit; | |
654 | } | |
655 | skb_num++; | |
656 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
6eec1774 | 657 | for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) { |
30dc5e63 TN |
658 | hlist_for_each_entry(map_info, &iwpm_hash_bucket[i], |
659 | hlist_node) { | |
660 | if (map_info->nl_client != nl_client) | |
661 | continue; | |
662 | nlh = NULL; | |
663 | if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client, | |
664 | RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) { | |
665 | ret = -ENOMEM; | |
666 | err_str = "Unable to put the nlmsg header"; | |
667 | goto send_mapping_info_unlock; | |
668 | } | |
669 | err_str = "Unable to put attribute of the nlmsg"; | |
670 | ret = ibnl_put_attr(skb, nlh, | |
671 | sizeof(struct sockaddr_storage), | |
672 | &map_info->local_sockaddr, | |
673 | IWPM_NLA_MAPINFO_LOCAL_ADDR); | |
674 | if (ret) | |
675 | goto send_mapping_info_unlock; | |
676 | ||
677 | ret = ibnl_put_attr(skb, nlh, | |
678 | sizeof(struct sockaddr_storage), | |
679 | &map_info->mapped_sockaddr, | |
680 | IWPM_NLA_MAPINFO_MAPPED_ADDR); | |
681 | if (ret) | |
682 | goto send_mapping_info_unlock; | |
683 | ||
04eae427 SS |
684 | nlmsg_end(skb, nlh); |
685 | ||
30dc5e63 TN |
686 | iwpm_print_sockaddr(&map_info->local_sockaddr, |
687 | "send_mapping_info: Local sockaddr:"); | |
688 | iwpm_print_sockaddr(&map_info->mapped_sockaddr, | |
689 | "send_mapping_info: Mapped local sockaddr:"); | |
690 | mapping_num++; | |
691 | nlmsg_bytes += nlh->nlmsg_len; | |
692 | ||
693 | /* check if all mappings can fit in one skb */ | |
694 | if (NLMSG_GOODSIZE - nlmsg_bytes < nlh->nlmsg_len * 2) { | |
695 | /* and leave room for NLMSG_DONE */ | |
696 | nlmsg_bytes = 0; | |
697 | skb_num++; | |
698 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, | |
699 | flags); | |
700 | /* send the skb */ | |
701 | ret = send_nlmsg_done(skb, nl_client, iwpm_pid); | |
702 | skb = NULL; | |
703 | if (ret) { | |
704 | err_str = "Unable to send map info"; | |
705 | goto send_mapping_info_exit; | |
706 | } | |
707 | if (skb_num == IWPM_MAPINFO_SKB_COUNT) { | |
708 | ret = -ENOMEM; | |
709 | err_str = "Insufficient skbs for map info"; | |
710 | goto send_mapping_info_exit; | |
711 | } | |
712 | skb = dev_alloc_skb(NLMSG_GOODSIZE); | |
713 | if (!skb) { | |
714 | ret = -ENOMEM; | |
715 | err_str = "Unable to allocate skb"; | |
716 | goto send_mapping_info_exit; | |
717 | } | |
718 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
719 | } | |
720 | } | |
721 | } | |
722 | send_mapping_info_unlock: | |
723 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
724 | send_mapping_info_exit: | |
725 | if (ret) { | |
726 | pr_warn("%s: %s (ret = %d)\n", __func__, err_str, ret); | |
727 | if (skb) | |
728 | dev_kfree_skb(skb); | |
729 | return ret; | |
730 | } | |
731 | send_nlmsg_done(skb, nl_client, iwpm_pid); | |
732 | return send_mapinfo_num(mapping_num, nl_client, iwpm_pid); | |
733 | } | |
734 | ||
735 | int iwpm_mapinfo_available(void) | |
736 | { | |
737 | unsigned long flags; | |
738 | int full_bucket = 0, i = 0; | |
739 | ||
740 | spin_lock_irqsave(&iwpm_mapinfo_lock, flags); | |
741 | if (iwpm_hash_bucket) { | |
6eec1774 | 742 | for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) { |
30dc5e63 TN |
743 | if (!hlist_empty(&iwpm_hash_bucket[i])) { |
744 | full_bucket = 1; | |
745 | break; | |
746 | } | |
747 | } | |
748 | } | |
749 | spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); | |
750 | return full_bucket; | |
751 | } |