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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#define IWPM_MSG_SIZE 512
41
42static LIST_HEAD(iwpm_nlmsg_req_list);
43static DEFINE_SPINLOCK(iwpm_nlmsg_req_lock);
44
45static struct hlist_head *iwpm_hash_bucket;
46static DEFINE_SPINLOCK(iwpm_mapinfo_lock);
47
48static struct hlist_head *iwpm_reminfo_bucket;
49static DEFINE_SPINLOCK(iwpm_reminfo_lock);
50
51static DEFINE_MUTEX(iwpm_admin_lock);
52static struct iwpm_admin_data iwpm_admin;
53
54int iwpm_init(u8 nl_client)
55{
56 int ret = 0;
57 mutex_lock(&iwpm_admin_lock);
58 if (atomic_read(&iwpm_admin.refcount) == 0) {
59 iwpm_hash_bucket = kcalloc(IWPM_MAPINFO_HASH_SIZE,
60 sizeof(struct hlist_head),
61 GFP_KERNEL);
62 if (!iwpm_hash_bucket) {
63 ret = -ENOMEM;
64 goto init_exit;
65 }
66 iwpm_reminfo_bucket = kcalloc(IWPM_REMINFO_HASH_SIZE,
67 sizeof(struct hlist_head),
68 GFP_KERNEL);
69 if (!iwpm_reminfo_bucket) {
70 kfree(iwpm_hash_bucket);
71 ret = -ENOMEM;
72 goto init_exit;
73 }
74 }
75 atomic_inc(&iwpm_admin.refcount);
76init_exit:
77 mutex_unlock(&iwpm_admin_lock);
78 if (!ret) {
79 iwpm_set_valid(nl_client, 1);
80 iwpm_set_registration(nl_client, IWPM_REG_UNDEF);
81 pr_debug("%s: Mapinfo and reminfo tables are created\n",
82 __func__);
83 }
84 return ret;
85}
86
87static void free_hash_bucket(void);
88static void free_reminfo_bucket(void);
89
90int iwpm_exit(u8 nl_client)
91{
92
93 if (!iwpm_valid_client(nl_client))
94 return -EINVAL;
95 mutex_lock(&iwpm_admin_lock);
96 if (atomic_read(&iwpm_admin.refcount) == 0) {
97 mutex_unlock(&iwpm_admin_lock);
98 pr_err("%s Incorrect usage - negative refcount\n", __func__);
99 return -EINVAL;
100 }
101 if (atomic_dec_and_test(&iwpm_admin.refcount)) {
102 free_hash_bucket();
103 free_reminfo_bucket();
104 pr_debug("%s: Resources are destroyed\n", __func__);
105 }
106 mutex_unlock(&iwpm_admin_lock);
107 iwpm_set_valid(nl_client, 0);
108 iwpm_set_registration(nl_client, IWPM_REG_UNDEF);
109 return 0;
110}
111
112static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage *,
113 struct sockaddr_storage *);
114
115int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr,
116 struct sockaddr_storage *mapped_sockaddr,
117 u8 nl_client)
118{
119 struct hlist_head *hash_bucket_head = NULL;
120 struct iwpm_mapping_info *map_info;
121 unsigned long flags;
122 int ret = -EINVAL;
123
124 if (!iwpm_valid_client(nl_client))
125 return ret;
126 map_info = kzalloc(sizeof(struct iwpm_mapping_info), GFP_KERNEL);
127 if (!map_info)
128 return -ENOMEM;
129
130 memcpy(&map_info->local_sockaddr, local_sockaddr,
131 sizeof(struct sockaddr_storage));
132 memcpy(&map_info->mapped_sockaddr, mapped_sockaddr,
133 sizeof(struct sockaddr_storage));
134 map_info->nl_client = nl_client;
135
136 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
137 if (iwpm_hash_bucket) {
138 hash_bucket_head = get_mapinfo_hash_bucket(
139 &map_info->local_sockaddr,
140 &map_info->mapped_sockaddr);
141 if (hash_bucket_head) {
142 hlist_add_head(&map_info->hlist_node, hash_bucket_head);
143 ret = 0;
144 }
145 }
146 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
147
148 if (!hash_bucket_head)
149 kfree(map_info);
150 return ret;
151}
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}
187
188static void free_hash_bucket(void)
189{
190 struct hlist_node *tmp_hlist_node;
191 struct iwpm_mapping_info *map_info;
192 unsigned long flags;
193 int i;
194
195
196 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
197 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
198 hlist_for_each_entry_safe(map_info, tmp_hlist_node,
199 &iwpm_hash_bucket[i], hlist_node) {
200
201 hlist_del_init(&map_info->hlist_node);
202 kfree(map_info);
203 }
204 }
205
206 kfree(iwpm_hash_bucket);
207 iwpm_hash_bucket = NULL;
208 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
209}
210
211static void free_reminfo_bucket(void)
212{
213 struct hlist_node *tmp_hlist_node;
214 struct iwpm_remote_info *rem_info;
215 unsigned long flags;
216 int i;
217
218
219 spin_lock_irqsave(&iwpm_reminfo_lock, flags);
220 for (i = 0; i < IWPM_REMINFO_HASH_SIZE; i++) {
221 hlist_for_each_entry_safe(rem_info, tmp_hlist_node,
222 &iwpm_reminfo_bucket[i], hlist_node) {
223
224 hlist_del_init(&rem_info->hlist_node);
225 kfree(rem_info);
226 }
227 }
228
229 kfree(iwpm_reminfo_bucket);
230 iwpm_reminfo_bucket = NULL;
231 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
232}
233
234static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage *,
235 struct sockaddr_storage *);
236
237void iwpm_add_remote_info(struct iwpm_remote_info *rem_info)
238{
239 struct hlist_head *hash_bucket_head;
240 unsigned long flags;
241
242 spin_lock_irqsave(&iwpm_reminfo_lock, flags);
243 if (iwpm_reminfo_bucket) {
244 hash_bucket_head = get_reminfo_hash_bucket(
245 &rem_info->mapped_loc_sockaddr,
246 &rem_info->mapped_rem_sockaddr);
247 if (hash_bucket_head)
248 hlist_add_head(&rem_info->hlist_node, hash_bucket_head);
249 }
250 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
251}
252
253int iwpm_get_remote_info(struct sockaddr_storage *mapped_loc_addr,
254 struct sockaddr_storage *mapped_rem_addr,
255 struct sockaddr_storage *remote_addr,
256 u8 nl_client)
257{
258 struct hlist_node *tmp_hlist_node;
259 struct hlist_head *hash_bucket_head;
260 struct iwpm_remote_info *rem_info = NULL;
261 unsigned long flags;
262 int ret = -EINVAL;
263
264 if (!iwpm_valid_client(nl_client)) {
265 pr_info("%s: Invalid client = %d\n", __func__, nl_client);
266 return ret;
267 }
268 spin_lock_irqsave(&iwpm_reminfo_lock, flags);
269 if (iwpm_reminfo_bucket) {
270 hash_bucket_head = get_reminfo_hash_bucket(
271 mapped_loc_addr,
272 mapped_rem_addr);
273 if (!hash_bucket_head)
274 goto get_remote_info_exit;
275 hlist_for_each_entry_safe(rem_info, tmp_hlist_node,
276 hash_bucket_head, hlist_node) {
277
278 if (!iwpm_compare_sockaddr(&rem_info->mapped_loc_sockaddr,
279 mapped_loc_addr) &&
280 !iwpm_compare_sockaddr(&rem_info->mapped_rem_sockaddr,
281 mapped_rem_addr)) {
282
283 memcpy(remote_addr, &rem_info->remote_sockaddr,
284 sizeof(struct sockaddr_storage));
285 iwpm_print_sockaddr(remote_addr,
286 "get_remote_info: Remote sockaddr:");
287
288 hlist_del_init(&rem_info->hlist_node);
289 kfree(rem_info);
290 ret = 0;
291 break;
292 }
293 }
294 }
295get_remote_info_exit:
296 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
297 return ret;
298}
299
300struct iwpm_nlmsg_request *iwpm_get_nlmsg_request(__u32 nlmsg_seq,
301 u8 nl_client, gfp_t gfp)
302{
303 struct iwpm_nlmsg_request *nlmsg_request = NULL;
304 unsigned long flags;
305
306 nlmsg_request = kzalloc(sizeof(struct iwpm_nlmsg_request), gfp);
307 if (!nlmsg_request)
308 return NULL;
309
310 spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
311 list_add_tail(&nlmsg_request->inprocess_list, &iwpm_nlmsg_req_list);
312 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
313
314 kref_init(&nlmsg_request->kref);
315 kref_get(&nlmsg_request->kref);
316 nlmsg_request->nlmsg_seq = nlmsg_seq;
317 nlmsg_request->nl_client = nl_client;
318 nlmsg_request->request_done = 0;
319 nlmsg_request->err_code = 0;
320 sema_init(&nlmsg_request->sem, 1);
321 down(&nlmsg_request->sem);
322 return nlmsg_request;
323}
324
325void iwpm_free_nlmsg_request(struct kref *kref)
326{
327 struct iwpm_nlmsg_request *nlmsg_request;
328 unsigned long flags;
329
330 nlmsg_request = container_of(kref, struct iwpm_nlmsg_request, kref);
331
332 spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
333 list_del_init(&nlmsg_request->inprocess_list);
334 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
335
336 if (!nlmsg_request->request_done)
337 pr_debug("%s Freeing incomplete nlmsg request (seq = %u).\n",
338 __func__, nlmsg_request->nlmsg_seq);
339 kfree(nlmsg_request);
340}
341
342struct iwpm_nlmsg_request *iwpm_find_nlmsg_request(__u32 echo_seq)
343{
344 struct iwpm_nlmsg_request *nlmsg_request;
345 struct iwpm_nlmsg_request *found_request = NULL;
346 unsigned long flags;
347
348 spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
349 list_for_each_entry(nlmsg_request, &iwpm_nlmsg_req_list,
350 inprocess_list) {
351 if (nlmsg_request->nlmsg_seq == echo_seq) {
352 found_request = nlmsg_request;
353 kref_get(&nlmsg_request->kref);
354 break;
355 }
356 }
357 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
358 return found_request;
359}
360
361int iwpm_wait_complete_req(struct iwpm_nlmsg_request *nlmsg_request)
362{
363 int ret;
364
365 ret = down_timeout(&nlmsg_request->sem, IWPM_NL_TIMEOUT);
366 if (ret) {
367 ret = -EINVAL;
368 pr_info("%s: Timeout %d sec for netlink request (seq = %u)\n",
369 __func__, (IWPM_NL_TIMEOUT/HZ), nlmsg_request->nlmsg_seq);
370 } else {
371 ret = nlmsg_request->err_code;
372 }
373 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
374 return ret;
375}
376
377int iwpm_get_nlmsg_seq(void)
378{
379 return atomic_inc_return(&iwpm_admin.nlmsg_seq);
380}
381
382int iwpm_valid_client(u8 nl_client)
383{
384 return iwpm_admin.client_list[nl_client];
385}
386
387void iwpm_set_valid(u8 nl_client, int valid)
388{
389 iwpm_admin.client_list[nl_client] = valid;
390}
391
392
393u32 iwpm_get_registration(u8 nl_client)
394{
395 return iwpm_admin.reg_list[nl_client];
396}
397
398
399void iwpm_set_registration(u8 nl_client, u32 reg)
400{
401 iwpm_admin.reg_list[nl_client] = reg;
402}
403
404
405u32 iwpm_check_registration(u8 nl_client, u32 reg)
406{
407 return (iwpm_get_registration(nl_client) & reg);
408}
409
410int iwpm_compare_sockaddr(struct sockaddr_storage *a_sockaddr,
411 struct sockaddr_storage *b_sockaddr)
412{
413 if (a_sockaddr->ss_family != b_sockaddr->ss_family)
414 return 1;
415 if (a_sockaddr->ss_family == AF_INET) {
416 struct sockaddr_in *a4_sockaddr =
417 (struct sockaddr_in *)a_sockaddr;
418 struct sockaddr_in *b4_sockaddr =
419 (struct sockaddr_in *)b_sockaddr;
420 if (!memcmp(&a4_sockaddr->sin_addr,
421 &b4_sockaddr->sin_addr, sizeof(struct in_addr))
422 && a4_sockaddr->sin_port == b4_sockaddr->sin_port)
423 return 0;
424
425 } else if (a_sockaddr->ss_family == AF_INET6) {
426 struct sockaddr_in6 *a6_sockaddr =
427 (struct sockaddr_in6 *)a_sockaddr;
428 struct sockaddr_in6 *b6_sockaddr =
429 (struct sockaddr_in6 *)b_sockaddr;
430 if (!memcmp(&a6_sockaddr->sin6_addr,
431 &b6_sockaddr->sin6_addr, sizeof(struct in6_addr))
432 && a6_sockaddr->sin6_port == b6_sockaddr->sin6_port)
433 return 0;
434
435 } else {
436 pr_err("%s: Invalid sockaddr family\n", __func__);
437 }
438 return 1;
439}
440
441struct sk_buff *iwpm_create_nlmsg(u32 nl_op, struct nlmsghdr **nlh,
442 int nl_client)
443{
444 struct sk_buff *skb = NULL;
445
446 skb = dev_alloc_skb(IWPM_MSG_SIZE);
447 if (!skb)
448 goto create_nlmsg_exit;
449
450 if (!(ibnl_put_msg(skb, nlh, 0, 0, nl_client, nl_op,
451 NLM_F_REQUEST))) {
452 pr_warn("%s: Unable to put the nlmsg header\n", __func__);
453 dev_kfree_skb(skb);
454 skb = NULL;
455 }
456create_nlmsg_exit:
457 return skb;
458}
459
460int iwpm_parse_nlmsg(struct netlink_callback *cb, int policy_max,
461 const struct nla_policy *nlmsg_policy,
462 struct nlattr *nltb[], const char *msg_type)
463{
464 int nlh_len = 0;
465 int ret;
466 const char *err_str = "";
467
468 ret = nlmsg_validate(cb->nlh, nlh_len, policy_max - 1, nlmsg_policy,
469 NULL);
470 if (ret) {
471 err_str = "Invalid attribute";
472 goto parse_nlmsg_error;
473 }
474 ret = nlmsg_parse(cb->nlh, nlh_len, nltb, policy_max - 1,
475 nlmsg_policy, NULL);
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
605 nlmsg_end(skb, nlh);
606
607 ret = rdma_nl_unicast(skb, iwpm_pid);
608 if (ret) {
609 skb = NULL;
610 err_str = "Unable to send a nlmsg";
611 goto mapinfo_num_error;
612 }
613 pr_debug("%s: Sent mapping number = %d\n", __func__, mapping_num);
614 return 0;
615mapinfo_num_error:
616 pr_info("%s: %s\n", __func__, err_str);
617 if (skb)
618 dev_kfree_skb(skb);
619 return ret;
620}
621
622static int send_nlmsg_done(struct sk_buff *skb, u8 nl_client, int iwpm_pid)
623{
624 struct nlmsghdr *nlh = NULL;
625 int ret = 0;
626
627 if (!skb)
628 return ret;
629 if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client,
630 RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) {
631 pr_warn("%s Unable to put NLMSG_DONE\n", __func__);
632 dev_kfree_skb(skb);
633 return -ENOMEM;
634 }
635 nlh->nlmsg_type = NLMSG_DONE;
636 ret = rdma_nl_unicast(skb, iwpm_pid);
637 if (ret)
638 pr_warn("%s Unable to send a nlmsg\n", __func__);
639 return ret;
640}
641
642int iwpm_send_mapinfo(u8 nl_client, int iwpm_pid)
643{
644 struct iwpm_mapping_info *map_info;
645 struct sk_buff *skb = NULL;
646 struct nlmsghdr *nlh;
647 int skb_num = 0, mapping_num = 0;
648 int i = 0, nlmsg_bytes = 0;
649 unsigned long flags;
650 const char *err_str = "";
651 int ret;
652
653 skb = dev_alloc_skb(NLMSG_GOODSIZE);
654 if (!skb) {
655 ret = -ENOMEM;
656 err_str = "Unable to allocate skb";
657 goto send_mapping_info_exit;
658 }
659 skb_num++;
660 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
661 ret = -EINVAL;
662 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
663 hlist_for_each_entry(map_info, &iwpm_hash_bucket[i],
664 hlist_node) {
665 if (map_info->nl_client != nl_client)
666 continue;
667 nlh = NULL;
668 if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client,
669 RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) {
670 ret = -ENOMEM;
671 err_str = "Unable to put the nlmsg header";
672 goto send_mapping_info_unlock;
673 }
674 err_str = "Unable to put attribute of the nlmsg";
675 ret = ibnl_put_attr(skb, nlh,
676 sizeof(struct sockaddr_storage),
677 &map_info->local_sockaddr,
678 IWPM_NLA_MAPINFO_LOCAL_ADDR);
679 if (ret)
680 goto send_mapping_info_unlock;
681
682 ret = ibnl_put_attr(skb, nlh,
683 sizeof(struct sockaddr_storage),
684 &map_info->mapped_sockaddr,
685 IWPM_NLA_MAPINFO_MAPPED_ADDR);
686 if (ret)
687 goto send_mapping_info_unlock;
688
689 nlmsg_end(skb, nlh);
690
691 iwpm_print_sockaddr(&map_info->local_sockaddr,
692 "send_mapping_info: Local sockaddr:");
693 iwpm_print_sockaddr(&map_info->mapped_sockaddr,
694 "send_mapping_info: Mapped local sockaddr:");
695 mapping_num++;
696 nlmsg_bytes += nlh->nlmsg_len;
697
698
699 if (NLMSG_GOODSIZE - nlmsg_bytes < nlh->nlmsg_len * 2) {
700
701 nlmsg_bytes = 0;
702 skb_num++;
703 spin_unlock_irqrestore(&iwpm_mapinfo_lock,
704 flags);
705
706 ret = send_nlmsg_done(skb, nl_client, iwpm_pid);
707 skb = NULL;
708 if (ret) {
709 err_str = "Unable to send map info";
710 goto send_mapping_info_exit;
711 }
712 if (skb_num == IWPM_MAPINFO_SKB_COUNT) {
713 ret = -ENOMEM;
714 err_str = "Insufficient skbs for map info";
715 goto send_mapping_info_exit;
716 }
717 skb = dev_alloc_skb(NLMSG_GOODSIZE);
718 if (!skb) {
719 ret = -ENOMEM;
720 err_str = "Unable to allocate skb";
721 goto send_mapping_info_exit;
722 }
723 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
724 }
725 }
726 }
727send_mapping_info_unlock:
728 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
729send_mapping_info_exit:
730 if (ret) {
731 pr_warn("%s: %s (ret = %d)\n", __func__, err_str, ret);
732 if (skb)
733 dev_kfree_skb(skb);
734 return ret;
735 }
736 send_nlmsg_done(skb, nl_client, iwpm_pid);
737 return send_mapinfo_num(mapping_num, nl_client, iwpm_pid);
738}
739
740int iwpm_mapinfo_available(void)
741{
742 unsigned long flags;
743 int full_bucket = 0, i = 0;
744
745 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
746 if (iwpm_hash_bucket) {
747 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
748 if (!hlist_empty(&iwpm_hash_bucket[i])) {
749 full_bucket = 1;
750 break;
751 }
752 }
753 }
754 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
755 return full_bucket;
756}
757
