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34#include "iwpm_util.h"
35
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)
40
41static LIST_HEAD(iwpm_nlmsg_req_list);
42static DEFINE_SPINLOCK(iwpm_nlmsg_req_lock);
43
44static struct hlist_head *iwpm_hash_bucket;
45static DEFINE_SPINLOCK(iwpm_mapinfo_lock);
46
47static struct hlist_head *iwpm_reminfo_bucket;
48static DEFINE_SPINLOCK(iwpm_reminfo_lock);
49
50static DEFINE_MUTEX(iwpm_admin_lock);
51static struct iwpm_admin_data iwpm_admin;
52
53int iwpm_init(u8 nl_client)
54{
55 int ret = 0;
56 if (iwpm_valid_client(nl_client))
57 return -EINVAL;
58 mutex_lock(&iwpm_admin_lock);
59 if (atomic_read(&iwpm_admin.refcount) == 0) {
60 iwpm_hash_bucket = kzalloc(IWPM_MAPINFO_HASH_SIZE *
61 sizeof(struct hlist_head), GFP_KERNEL);
62 if (!iwpm_hash_bucket) {
63 ret = -ENOMEM;
64 pr_err("%s Unable to create mapinfo hash table\n", __func__);
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;
74 }
75 }
76 atomic_inc(&iwpm_admin.refcount);
77init_exit:
78 mutex_unlock(&iwpm_admin_lock);
79 if (!ret) {
80 iwpm_set_valid(nl_client, 1);
81 pr_debug("%s: Mapinfo and reminfo tables are created\n",
82 __func__);
83 }
84 return ret;
85}
86EXPORT_SYMBOL(iwpm_init);
87
88static void free_hash_bucket(void);
89static void free_reminfo_bucket(void);
90
91int 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();
104 free_reminfo_bucket();
105 pr_debug("%s: Resources are destroyed\n", __func__);
106 }
107 mutex_unlock(&iwpm_admin_lock);
108 iwpm_set_valid(nl_client, 0);
109 return 0;
110}
111EXPORT_SYMBOL(iwpm_exit);
112
113static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage *,
114 struct sockaddr_storage *);
115
116int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr,
117 struct sockaddr_storage *mapped_sockaddr,
118 u8 nl_client)
119{
120 struct hlist_head *hash_bucket_head;
121 struct iwpm_mapping_info *map_info;
122 unsigned long flags;
123 int ret = -EINVAL;
124
125 if (!iwpm_valid_client(nl_client))
126 return ret;
127 map_info = kzalloc(sizeof(struct iwpm_mapping_info), GFP_KERNEL);
128 if (!map_info) {
129 pr_err("%s: Unable to allocate a mapping info\n", __func__);
130 return -ENOMEM;
131 }
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) {
140 hash_bucket_head = get_mapinfo_hash_bucket(
141 &map_info->local_sockaddr,
142 &map_info->mapped_sockaddr);
143 if (hash_bucket_head) {
144 hlist_add_head(&map_info->hlist_node, hash_bucket_head);
145 ret = 0;
146 }
147 }
148 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
149 return ret;
150}
151EXPORT_SYMBOL(iwpm_create_mapinfo);
152
153int 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) {
164 hash_bucket_head = get_mapinfo_hash_bucket(
165 local_sockaddr,
166 mapped_local_addr);
167 if (!hash_bucket_head)
168 goto remove_mapinfo_exit;
169
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 }
183remove_mapinfo_exit:
184 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
185 return ret;
186}
187EXPORT_SYMBOL(iwpm_remove_mapinfo);
188
189static 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
197 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
198 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
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
207 kfree(iwpm_hash_bucket);
208 iwpm_hash_bucket = NULL;
209 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
210}
211
212static 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
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
230 kfree(iwpm_reminfo_bucket);
231 iwpm_reminfo_bucket = NULL;
232 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
233}
234
235static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage *,
236 struct sockaddr_storage *);
237
238void 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
254int iwpm_get_remote_info(struct sockaddr_storage *mapped_loc_addr,
255 struct sockaddr_storage *mapped_rem_addr,
256 struct sockaddr_storage *remote_addr,
257 u8 nl_client)
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 }
296get_remote_info_exit:
297 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
298 return ret;
299}
300EXPORT_SYMBOL(iwpm_get_remote_info);
301
302struct 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);
309 if (!nlmsg_request) {
310 pr_err("%s Unable to allocate a nlmsg_request\n", __func__);
311 return NULL;
312 }
313 spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
314 list_add_tail(&nlmsg_request->inprocess_list, &iwpm_nlmsg_req_list);
315 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
316
317 kref_init(&nlmsg_request->kref);
318 kref_get(&nlmsg_request->kref);
319 nlmsg_request->nlmsg_seq = nlmsg_seq;
320 nlmsg_request->nl_client = nl_client;
321 nlmsg_request->request_done = 0;
322 nlmsg_request->err_code = 0;
323 return nlmsg_request;
324}
325
326void iwpm_free_nlmsg_request(struct kref *kref)
327{
328 struct iwpm_nlmsg_request *nlmsg_request;
329 unsigned long flags;
330
331 nlmsg_request = container_of(kref, struct iwpm_nlmsg_request, kref);
332
333 spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
334 list_del_init(&nlmsg_request->inprocess_list);
335 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
336
337 if (!nlmsg_request->request_done)
338 pr_debug("%s Freeing incomplete nlmsg request (seq = %u).\n",
339 __func__, nlmsg_request->nlmsg_seq);
340 kfree(nlmsg_request);
341}
342
343struct iwpm_nlmsg_request *iwpm_find_nlmsg_request(__u32 echo_seq)
344{
345 struct iwpm_nlmsg_request *nlmsg_request;
346 struct iwpm_nlmsg_request *found_request = NULL;
347 unsigned long flags;
348
349 spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
350 list_for_each_entry(nlmsg_request, &iwpm_nlmsg_req_list,
351 inprocess_list) {
352 if (nlmsg_request->nlmsg_seq == echo_seq) {
353 found_request = nlmsg_request;
354 kref_get(&nlmsg_request->kref);
355 break;
356 }
357 }
358 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
359 return found_request;
360}
361
362int iwpm_wait_complete_req(struct iwpm_nlmsg_request *nlmsg_request)
363{
364 int ret;
365 init_waitqueue_head(&nlmsg_request->waitq);
366
367 ret = wait_event_timeout(nlmsg_request->waitq,
368 (nlmsg_request->request_done != 0), IWPM_NL_TIMEOUT);
369 if (!ret) {
370 ret = -EINVAL;
371 pr_info("%s: Timeout %d sec for netlink request (seq = %u)\n",
372 __func__, (IWPM_NL_TIMEOUT/HZ), nlmsg_request->nlmsg_seq);
373 } else {
374 ret = nlmsg_request->err_code;
375 }
376 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
377 return ret;
378}
379
380int iwpm_get_nlmsg_seq(void)
381{
382 return atomic_inc_return(&iwpm_admin.nlmsg_seq);
383}
384
385int iwpm_valid_client(u8 nl_client)
386{
387 if (nl_client >= RDMA_NL_NUM_CLIENTS)
388 return 0;
389 return iwpm_admin.client_list[nl_client];
390}
391
392void iwpm_set_valid(u8 nl_client, int valid)
393{
394 if (nl_client >= RDMA_NL_NUM_CLIENTS)
395 return;
396 iwpm_admin.client_list[nl_client] = valid;
397}
398
399
400int iwpm_registered_client(u8 nl_client)
401{
402 return iwpm_admin.reg_list[nl_client];
403}
404
405
406void iwpm_set_registered(u8 nl_client, int reg)
407{
408 iwpm_admin.reg_list[nl_client] = reg;
409}
410
411int iwpm_compare_sockaddr(struct sockaddr_storage *a_sockaddr,
412 struct sockaddr_storage *b_sockaddr)
413{
414 if (a_sockaddr->ss_family != b_sockaddr->ss_family)
415 return 1;
416 if (a_sockaddr->ss_family == AF_INET) {
417 struct sockaddr_in *a4_sockaddr =
418 (struct sockaddr_in *)a_sockaddr;
419 struct sockaddr_in *b4_sockaddr =
420 (struct sockaddr_in *)b_sockaddr;
421 if (!memcmp(&a4_sockaddr->sin_addr,
422 &b4_sockaddr->sin_addr, sizeof(struct in_addr))
423 && a4_sockaddr->sin_port == b4_sockaddr->sin_port)
424 return 0;
425
426 } else if (a_sockaddr->ss_family == AF_INET6) {
427 struct sockaddr_in6 *a6_sockaddr =
428 (struct sockaddr_in6 *)a_sockaddr;
429 struct sockaddr_in6 *b6_sockaddr =
430 (struct sockaddr_in6 *)b_sockaddr;
431 if (!memcmp(&a6_sockaddr->sin6_addr,
432 &b6_sockaddr->sin6_addr, sizeof(struct in6_addr))
433 && a6_sockaddr->sin6_port == b6_sockaddr->sin6_port)
434 return 0;
435
436 } else {
437 pr_err("%s: Invalid sockaddr family\n", __func__);
438 }
439 return 1;
440}
441
442struct sk_buff *iwpm_create_nlmsg(u32 nl_op, struct nlmsghdr **nlh,
443 int nl_client)
444{
445 struct sk_buff *skb = NULL;
446
447 skb = dev_alloc_skb(NLMSG_GOODSIZE);
448 if (!skb) {
449 pr_err("%s Unable to allocate skb\n", __func__);
450 goto create_nlmsg_exit;
451 }
452 if (!(ibnl_put_msg(skb, nlh, 0, 0, nl_client, nl_op,
453 NLM_F_REQUEST))) {
454 pr_warn("%s: Unable to put the nlmsg header\n", __func__);
455 dev_kfree_skb(skb);
456 skb = NULL;
457 }
458create_nlmsg_exit:
459 return skb;
460}
461
462int iwpm_parse_nlmsg(struct netlink_callback *cb, int policy_max,
463 const struct nla_policy *nlmsg_policy,
464 struct nlattr *nltb[], const char *msg_type)
465{
466 int nlh_len = 0;
467 int ret;
468 const char *err_str = "";
469
470 ret = nlmsg_validate(cb->nlh, nlh_len, policy_max-1, nlmsg_policy);
471 if (ret) {
472 err_str = "Invalid attribute";
473 goto parse_nlmsg_error;
474 }
475 ret = nlmsg_parse(cb->nlh, nlh_len, nltb, policy_max-1, nlmsg_policy);
476 if (ret) {
477 err_str = "Unable to parse the nlmsg";
478 goto parse_nlmsg_error;
479 }
480 ret = iwpm_validate_nlmsg_attr(nltb, policy_max);
481 if (ret) {
482 err_str = "Invalid NULL attribute";
483 goto parse_nlmsg_error;
484 }
485 return 0;
486parse_nlmsg_error:
487 pr_warn("%s: %s (msg type %s ret = %d)\n",
488 __func__, err_str, msg_type, ret);
489 return ret;
490}
491
492void iwpm_print_sockaddr(struct sockaddr_storage *sockaddr, char *msg)
493{
494 struct sockaddr_in6 *sockaddr_v6;
495 struct sockaddr_in *sockaddr_v4;
496
497 switch (sockaddr->ss_family) {
498 case AF_INET:
499 sockaddr_v4 = (struct sockaddr_in *)sockaddr;
500 pr_debug("%s IPV4 %pI4: %u(0x%04X)\n",
501 msg, &sockaddr_v4->sin_addr,
502 ntohs(sockaddr_v4->sin_port),
503 ntohs(sockaddr_v4->sin_port));
504 break;
505 case AF_INET6:
506 sockaddr_v6 = (struct sockaddr_in6 *)sockaddr;
507 pr_debug("%s IPV6 %pI6: %u(0x%04X)\n",
508 msg, &sockaddr_v6->sin6_addr,
509 ntohs(sockaddr_v6->sin6_port),
510 ntohs(sockaddr_v6->sin6_port));
511 break;
512 default:
513 break;
514 }
515}
516
517static u32 iwpm_ipv6_jhash(struct sockaddr_in6 *ipv6_sockaddr)
518{
519 u32 ipv6_hash = jhash(&ipv6_sockaddr->sin6_addr, sizeof(struct in6_addr), 0);
520 u32 hash = jhash_2words(ipv6_hash, (__force u32) ipv6_sockaddr->sin6_port, 0);
521 return hash;
522}
523
524static u32 iwpm_ipv4_jhash(struct sockaddr_in *ipv4_sockaddr)
525{
526 u32 ipv4_hash = jhash(&ipv4_sockaddr->sin_addr, sizeof(struct in_addr), 0);
527 u32 hash = jhash_2words(ipv4_hash, (__force u32) ipv4_sockaddr->sin_port, 0);
528 return hash;
529}
530
531static int get_hash_bucket(struct sockaddr_storage *a_sockaddr,
532 struct sockaddr_storage *b_sockaddr, u32 *hash)
533{
534 u32 a_hash, b_hash;
535
536 if (a_sockaddr->ss_family == AF_INET) {
537 a_hash = iwpm_ipv4_jhash((struct sockaddr_in *) a_sockaddr);
538 b_hash = iwpm_ipv4_jhash((struct sockaddr_in *) b_sockaddr);
539
540 } else if (a_sockaddr->ss_family == AF_INET6) {
541 a_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) a_sockaddr);
542 b_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) b_sockaddr);
543 } else {
544 pr_err("%s: Invalid sockaddr family\n", __func__);
545 return -EINVAL;
546 }
547
548 if (a_hash == b_hash)
549 *hash = a_hash;
550 else
551 *hash = jhash_2words(a_hash, b_hash, 0);
552 return 0;
553}
554
555static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage
556 *local_sockaddr, struct sockaddr_storage
557 *mapped_sockaddr)
558{
559 u32 hash;
560 int ret;
561
562 ret = get_hash_bucket(local_sockaddr, mapped_sockaddr, &hash);
563 if (ret)
564 return NULL;
565 return &iwpm_hash_bucket[hash & IWPM_MAPINFO_HASH_MASK];
566}
567
568static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage
569 *mapped_loc_sockaddr, struct sockaddr_storage
570 *mapped_rem_sockaddr)
571{
572 u32 hash;
573 int ret;
574
575 ret = get_hash_bucket(mapped_loc_sockaddr, mapped_rem_sockaddr, &hash);
576 if (ret)
577 return NULL;
578 return &iwpm_reminfo_bucket[hash & IWPM_REMINFO_HASH_MASK];
579}
580
581static int send_mapinfo_num(u32 mapping_num, u8 nl_client, int iwpm_pid)
582{
583 struct sk_buff *skb = NULL;
584 struct nlmsghdr *nlh;
585 u32 msg_seq;
586 const char *err_str = "";
587 int ret = -EINVAL;
588
589 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_MAPINFO_NUM, &nlh, nl_client);
590 if (!skb) {
591 err_str = "Unable to create a nlmsg";
592 goto mapinfo_num_error;
593 }
594 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
595 msg_seq = 0;
596 err_str = "Unable to put attribute of mapinfo number nlmsg";
597 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_MAPINFO_SEQ);
598 if (ret)
599 goto mapinfo_num_error;
600 ret = ibnl_put_attr(skb, nlh, sizeof(u32),
601 &mapping_num, IWPM_NLA_MAPINFO_SEND_NUM);
602 if (ret)
603 goto mapinfo_num_error;
604 ret = ibnl_unicast(skb, nlh, iwpm_pid);
605 if (ret) {
606 skb = NULL;
607 err_str = "Unable to send a nlmsg";
608 goto mapinfo_num_error;
609 }
610 pr_debug("%s: Sent mapping number = %d\n", __func__, mapping_num);
611 return 0;
612mapinfo_num_error:
613 pr_info("%s: %s\n", __func__, err_str);
614 if (skb)
615 dev_kfree_skb(skb);
616 return ret;
617}
618
619static int send_nlmsg_done(struct sk_buff *skb, u8 nl_client, int iwpm_pid)
620{
621 struct nlmsghdr *nlh = NULL;
622 int ret = 0;
623
624 if (!skb)
625 return ret;
626 if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client,
627 RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) {
628 pr_warn("%s Unable to put NLMSG_DONE\n", __func__);
629 return -ENOMEM;
630 }
631 nlh->nlmsg_type = NLMSG_DONE;
632 ret = ibnl_unicast(skb, (struct nlmsghdr *)skb->data, iwpm_pid);
633 if (ret)
634 pr_warn("%s Unable to send a nlmsg\n", __func__);
635 return ret;
636}
637
638int 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);
657 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
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
684 iwpm_print_sockaddr(&map_info->local_sockaddr,
685 "send_mapping_info: Local sockaddr:");
686 iwpm_print_sockaddr(&map_info->mapped_sockaddr,
687 "send_mapping_info: Mapped local sockaddr:");
688 mapping_num++;
689 nlmsg_bytes += nlh->nlmsg_len;
690
691
692 if (NLMSG_GOODSIZE - nlmsg_bytes < nlh->nlmsg_len * 2) {
693
694 nlmsg_bytes = 0;
695 skb_num++;
696 spin_unlock_irqrestore(&iwpm_mapinfo_lock,
697 flags);
698
699 ret = send_nlmsg_done(skb, nl_client, iwpm_pid);
700 skb = NULL;
701 if (ret) {
702 err_str = "Unable to send map info";
703 goto send_mapping_info_exit;
704 }
705 if (skb_num == IWPM_MAPINFO_SKB_COUNT) {
706 ret = -ENOMEM;
707 err_str = "Insufficient skbs for map info";
708 goto send_mapping_info_exit;
709 }
710 skb = dev_alloc_skb(NLMSG_GOODSIZE);
711 if (!skb) {
712 ret = -ENOMEM;
713 err_str = "Unable to allocate skb";
714 goto send_mapping_info_exit;
715 }
716 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
717 }
718 }
719 }
720send_mapping_info_unlock:
721 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
722send_mapping_info_exit:
723 if (ret) {
724 pr_warn("%s: %s (ret = %d)\n", __func__, err_str, ret);
725 if (skb)
726 dev_kfree_skb(skb);
727 return ret;
728 }
729 send_nlmsg_done(skb, nl_client, iwpm_pid);
730 return send_mapinfo_num(mapping_num, nl_client, iwpm_pid);
731}
732
733int iwpm_mapinfo_available(void)
734{
735 unsigned long flags;
736 int full_bucket = 0, i = 0;
737
738 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
739 if (iwpm_hash_bucket) {
740 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
741 if (!hlist_empty(&iwpm_hash_bucket[i])) {
742 full_bucket = 1;
743 break;
744 }
745 }
746 }
747 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
748 return full_bucket;
749}
750
