2 * Copyright (c) 2014 Chelsio, Inc. All rights reserved.
3 * Copyright (c) 2014 Intel Corporation. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
34 #include "iwpm_util.h"
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
42 static LIST_HEAD(iwpm_nlmsg_req_list);
43 static DEFINE_SPINLOCK(iwpm_nlmsg_req_lock);
45 static struct hlist_head *iwpm_hash_bucket;
46 static DEFINE_SPINLOCK(iwpm_mapinfo_lock);
48 static struct hlist_head *iwpm_reminfo_bucket;
49 static DEFINE_SPINLOCK(iwpm_reminfo_lock);
51 static DEFINE_MUTEX(iwpm_admin_lock);
52 static struct iwpm_admin_data iwpm_admin;
54 int iwpm_init(u8 nl_client)
57 mutex_lock(&iwpm_admin_lock);
58 if (atomic_read(&iwpm_admin.refcount) == 0) {
59 iwpm_hash_bucket = kzalloc(IWPM_MAPINFO_HASH_SIZE *
60 sizeof(struct hlist_head), GFP_KERNEL);
61 if (!iwpm_hash_bucket) {
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);
73 atomic_inc(&iwpm_admin.refcount);
75 mutex_unlock(&iwpm_admin_lock);
77 iwpm_set_valid(nl_client, 1);
78 iwpm_set_registration(nl_client, IWPM_REG_UNDEF);
79 pr_debug("%s: Mapinfo and reminfo tables are created\n",
85 static void free_hash_bucket(void);
86 static void free_reminfo_bucket(void);
88 int iwpm_exit(u8 nl_client)
91 if (!iwpm_valid_client(nl_client))
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__);
99 if (atomic_dec_and_test(&iwpm_admin.refcount)) {
101 free_reminfo_bucket();
102 pr_debug("%s: Resources are destroyed\n", __func__);
104 mutex_unlock(&iwpm_admin_lock);
105 iwpm_set_valid(nl_client, 0);
106 iwpm_set_registration(nl_client, IWPM_REG_UNDEF);
110 static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage *,
111 struct sockaddr_storage *);
113 int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr,
114 struct sockaddr_storage *mapped_sockaddr,
117 struct hlist_head *hash_bucket_head = NULL;
118 struct iwpm_mapping_info *map_info;
122 if (!iwpm_valid_client(nl_client))
124 map_info = kzalloc(sizeof(struct iwpm_mapping_info), GFP_KERNEL);
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;
134 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
135 if (iwpm_hash_bucket) {
136 hash_bucket_head = get_mapinfo_hash_bucket(
137 &map_info->local_sockaddr,
138 &map_info->mapped_sockaddr);
139 if (hash_bucket_head) {
140 hlist_add_head(&map_info->hlist_node, hash_bucket_head);
144 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
146 if (!hash_bucket_head)
151 int iwpm_remove_mapinfo(struct sockaddr_storage *local_sockaddr,
152 struct sockaddr_storage *mapped_local_addr)
154 struct hlist_node *tmp_hlist_node;
155 struct hlist_head *hash_bucket_head;
156 struct iwpm_mapping_info *map_info = NULL;
160 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
161 if (iwpm_hash_bucket) {
162 hash_bucket_head = get_mapinfo_hash_bucket(
165 if (!hash_bucket_head)
166 goto remove_mapinfo_exit;
168 hlist_for_each_entry_safe(map_info, tmp_hlist_node,
169 hash_bucket_head, hlist_node) {
171 if (!iwpm_compare_sockaddr(&map_info->mapped_sockaddr,
172 mapped_local_addr)) {
174 hlist_del_init(&map_info->hlist_node);
182 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
186 static void free_hash_bucket(void)
188 struct hlist_node *tmp_hlist_node;
189 struct iwpm_mapping_info *map_info;
193 /* remove all the mapinfo data from the list */
194 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
195 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
196 hlist_for_each_entry_safe(map_info, tmp_hlist_node,
197 &iwpm_hash_bucket[i], hlist_node) {
199 hlist_del_init(&map_info->hlist_node);
203 /* free the hash list */
204 kfree(iwpm_hash_bucket);
205 iwpm_hash_bucket = NULL;
206 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
209 static void free_reminfo_bucket(void)
211 struct hlist_node *tmp_hlist_node;
212 struct iwpm_remote_info *rem_info;
216 /* remove all the remote info from the list */
217 spin_lock_irqsave(&iwpm_reminfo_lock, flags);
218 for (i = 0; i < IWPM_REMINFO_HASH_SIZE; i++) {
219 hlist_for_each_entry_safe(rem_info, tmp_hlist_node,
220 &iwpm_reminfo_bucket[i], hlist_node) {
222 hlist_del_init(&rem_info->hlist_node);
226 /* free the hash list */
227 kfree(iwpm_reminfo_bucket);
228 iwpm_reminfo_bucket = NULL;
229 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
232 static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage *,
233 struct sockaddr_storage *);
235 void iwpm_add_remote_info(struct iwpm_remote_info *rem_info)
237 struct hlist_head *hash_bucket_head;
240 spin_lock_irqsave(&iwpm_reminfo_lock, flags);
241 if (iwpm_reminfo_bucket) {
242 hash_bucket_head = get_reminfo_hash_bucket(
243 &rem_info->mapped_loc_sockaddr,
244 &rem_info->mapped_rem_sockaddr);
245 if (hash_bucket_head)
246 hlist_add_head(&rem_info->hlist_node, hash_bucket_head);
248 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
251 int iwpm_get_remote_info(struct sockaddr_storage *mapped_loc_addr,
252 struct sockaddr_storage *mapped_rem_addr,
253 struct sockaddr_storage *remote_addr,
256 struct hlist_node *tmp_hlist_node;
257 struct hlist_head *hash_bucket_head;
258 struct iwpm_remote_info *rem_info = NULL;
262 if (!iwpm_valid_client(nl_client)) {
263 pr_info("%s: Invalid client = %d\n", __func__, nl_client);
266 spin_lock_irqsave(&iwpm_reminfo_lock, flags);
267 if (iwpm_reminfo_bucket) {
268 hash_bucket_head = get_reminfo_hash_bucket(
271 if (!hash_bucket_head)
272 goto get_remote_info_exit;
273 hlist_for_each_entry_safe(rem_info, tmp_hlist_node,
274 hash_bucket_head, hlist_node) {
276 if (!iwpm_compare_sockaddr(&rem_info->mapped_loc_sockaddr,
278 !iwpm_compare_sockaddr(&rem_info->mapped_rem_sockaddr,
281 memcpy(remote_addr, &rem_info->remote_sockaddr,
282 sizeof(struct sockaddr_storage));
283 iwpm_print_sockaddr(remote_addr,
284 "get_remote_info: Remote sockaddr:");
286 hlist_del_init(&rem_info->hlist_node);
293 get_remote_info_exit:
294 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
298 struct iwpm_nlmsg_request *iwpm_get_nlmsg_request(__u32 nlmsg_seq,
299 u8 nl_client, gfp_t gfp)
301 struct iwpm_nlmsg_request *nlmsg_request = NULL;
304 nlmsg_request = kzalloc(sizeof(struct iwpm_nlmsg_request), gfp);
308 spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
309 list_add_tail(&nlmsg_request->inprocess_list, &iwpm_nlmsg_req_list);
310 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
312 kref_init(&nlmsg_request->kref);
313 kref_get(&nlmsg_request->kref);
314 nlmsg_request->nlmsg_seq = nlmsg_seq;
315 nlmsg_request->nl_client = nl_client;
316 nlmsg_request->request_done = 0;
317 nlmsg_request->err_code = 0;
318 sema_init(&nlmsg_request->sem, 1);
319 down(&nlmsg_request->sem);
320 return nlmsg_request;
323 void iwpm_free_nlmsg_request(struct kref *kref)
325 struct iwpm_nlmsg_request *nlmsg_request;
328 nlmsg_request = container_of(kref, struct iwpm_nlmsg_request, kref);
330 spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
331 list_del_init(&nlmsg_request->inprocess_list);
332 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
334 if (!nlmsg_request->request_done)
335 pr_debug("%s Freeing incomplete nlmsg request (seq = %u).\n",
336 __func__, nlmsg_request->nlmsg_seq);
337 kfree(nlmsg_request);
340 struct iwpm_nlmsg_request *iwpm_find_nlmsg_request(__u32 echo_seq)
342 struct iwpm_nlmsg_request *nlmsg_request;
343 struct iwpm_nlmsg_request *found_request = NULL;
346 spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
347 list_for_each_entry(nlmsg_request, &iwpm_nlmsg_req_list,
349 if (nlmsg_request->nlmsg_seq == echo_seq) {
350 found_request = nlmsg_request;
351 kref_get(&nlmsg_request->kref);
355 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
356 return found_request;
359 int iwpm_wait_complete_req(struct iwpm_nlmsg_request *nlmsg_request)
363 ret = down_timeout(&nlmsg_request->sem, IWPM_NL_TIMEOUT);
366 pr_info("%s: Timeout %d sec for netlink request (seq = %u)\n",
367 __func__, (IWPM_NL_TIMEOUT/HZ), nlmsg_request->nlmsg_seq);
369 ret = nlmsg_request->err_code;
371 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
375 int iwpm_get_nlmsg_seq(void)
377 return atomic_inc_return(&iwpm_admin.nlmsg_seq);
380 int iwpm_valid_client(u8 nl_client)
382 return iwpm_admin.client_list[nl_client];
385 void iwpm_set_valid(u8 nl_client, int valid)
387 iwpm_admin.client_list[nl_client] = valid;
391 u32 iwpm_get_registration(u8 nl_client)
393 return iwpm_admin.reg_list[nl_client];
397 void iwpm_set_registration(u8 nl_client, u32 reg)
399 iwpm_admin.reg_list[nl_client] = reg;
403 u32 iwpm_check_registration(u8 nl_client, u32 reg)
405 return (iwpm_get_registration(nl_client) & reg);
408 int iwpm_compare_sockaddr(struct sockaddr_storage *a_sockaddr,
409 struct sockaddr_storage *b_sockaddr)
411 if (a_sockaddr->ss_family != b_sockaddr->ss_family)
413 if (a_sockaddr->ss_family == AF_INET) {
414 struct sockaddr_in *a4_sockaddr =
415 (struct sockaddr_in *)a_sockaddr;
416 struct sockaddr_in *b4_sockaddr =
417 (struct sockaddr_in *)b_sockaddr;
418 if (!memcmp(&a4_sockaddr->sin_addr,
419 &b4_sockaddr->sin_addr, sizeof(struct in_addr))
420 && a4_sockaddr->sin_port == b4_sockaddr->sin_port)
423 } else if (a_sockaddr->ss_family == AF_INET6) {
424 struct sockaddr_in6 *a6_sockaddr =
425 (struct sockaddr_in6 *)a_sockaddr;
426 struct sockaddr_in6 *b6_sockaddr =
427 (struct sockaddr_in6 *)b_sockaddr;
428 if (!memcmp(&a6_sockaddr->sin6_addr,
429 &b6_sockaddr->sin6_addr, sizeof(struct in6_addr))
430 && a6_sockaddr->sin6_port == b6_sockaddr->sin6_port)
434 pr_err("%s: Invalid sockaddr family\n", __func__);
439 struct sk_buff *iwpm_create_nlmsg(u32 nl_op, struct nlmsghdr **nlh,
442 struct sk_buff *skb = NULL;
444 skb = dev_alloc_skb(IWPM_MSG_SIZE);
446 goto create_nlmsg_exit;
448 if (!(ibnl_put_msg(skb, nlh, 0, 0, nl_client, nl_op,
450 pr_warn("%s: Unable to put the nlmsg header\n", __func__);
458 int iwpm_parse_nlmsg(struct netlink_callback *cb, int policy_max,
459 const struct nla_policy *nlmsg_policy,
460 struct nlattr *nltb[], const char *msg_type)
464 const char *err_str = "";
466 ret = nlmsg_validate(cb->nlh, nlh_len, policy_max - 1, nlmsg_policy,
469 err_str = "Invalid attribute";
470 goto parse_nlmsg_error;
472 ret = nlmsg_parse(cb->nlh, nlh_len, nltb, policy_max - 1,
475 err_str = "Unable to parse the nlmsg";
476 goto parse_nlmsg_error;
478 ret = iwpm_validate_nlmsg_attr(nltb, policy_max);
480 err_str = "Invalid NULL attribute";
481 goto parse_nlmsg_error;
485 pr_warn("%s: %s (msg type %s ret = %d)\n",
486 __func__, err_str, msg_type, ret);
490 void iwpm_print_sockaddr(struct sockaddr_storage *sockaddr, char *msg)
492 struct sockaddr_in6 *sockaddr_v6;
493 struct sockaddr_in *sockaddr_v4;
495 switch (sockaddr->ss_family) {
497 sockaddr_v4 = (struct sockaddr_in *)sockaddr;
498 pr_debug("%s IPV4 %pI4: %u(0x%04X)\n",
499 msg, &sockaddr_v4->sin_addr,
500 ntohs(sockaddr_v4->sin_port),
501 ntohs(sockaddr_v4->sin_port));
504 sockaddr_v6 = (struct sockaddr_in6 *)sockaddr;
505 pr_debug("%s IPV6 %pI6: %u(0x%04X)\n",
506 msg, &sockaddr_v6->sin6_addr,
507 ntohs(sockaddr_v6->sin6_port),
508 ntohs(sockaddr_v6->sin6_port));
515 static u32 iwpm_ipv6_jhash(struct sockaddr_in6 *ipv6_sockaddr)
517 u32 ipv6_hash = jhash(&ipv6_sockaddr->sin6_addr, sizeof(struct in6_addr), 0);
518 u32 hash = jhash_2words(ipv6_hash, (__force u32) ipv6_sockaddr->sin6_port, 0);
522 static u32 iwpm_ipv4_jhash(struct sockaddr_in *ipv4_sockaddr)
524 u32 ipv4_hash = jhash(&ipv4_sockaddr->sin_addr, sizeof(struct in_addr), 0);
525 u32 hash = jhash_2words(ipv4_hash, (__force u32) ipv4_sockaddr->sin_port, 0);
529 static int get_hash_bucket(struct sockaddr_storage *a_sockaddr,
530 struct sockaddr_storage *b_sockaddr, u32 *hash)
534 if (a_sockaddr->ss_family == AF_INET) {
535 a_hash = iwpm_ipv4_jhash((struct sockaddr_in *) a_sockaddr);
536 b_hash = iwpm_ipv4_jhash((struct sockaddr_in *) b_sockaddr);
538 } else if (a_sockaddr->ss_family == AF_INET6) {
539 a_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) a_sockaddr);
540 b_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) b_sockaddr);
542 pr_err("%s: Invalid sockaddr family\n", __func__);
546 if (a_hash == b_hash) /* if port mapper isn't available */
549 *hash = jhash_2words(a_hash, b_hash, 0);
553 static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage
554 *local_sockaddr, struct sockaddr_storage
560 ret = get_hash_bucket(local_sockaddr, mapped_sockaddr, &hash);
563 return &iwpm_hash_bucket[hash & IWPM_MAPINFO_HASH_MASK];
566 static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage
567 *mapped_loc_sockaddr, struct sockaddr_storage
568 *mapped_rem_sockaddr)
573 ret = get_hash_bucket(mapped_loc_sockaddr, mapped_rem_sockaddr, &hash);
576 return &iwpm_reminfo_bucket[hash & IWPM_REMINFO_HASH_MASK];
579 static int send_mapinfo_num(u32 mapping_num, u8 nl_client, int iwpm_pid)
581 struct sk_buff *skb = NULL;
582 struct nlmsghdr *nlh;
584 const char *err_str = "";
587 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_MAPINFO_NUM, &nlh, nl_client);
589 err_str = "Unable to create a nlmsg";
590 goto mapinfo_num_error;
592 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
594 err_str = "Unable to put attribute of mapinfo number nlmsg";
595 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_MAPINFO_SEQ);
597 goto mapinfo_num_error;
598 ret = ibnl_put_attr(skb, nlh, sizeof(u32),
599 &mapping_num, IWPM_NLA_MAPINFO_SEND_NUM);
601 goto mapinfo_num_error;
605 ret = rdma_nl_unicast(skb, iwpm_pid);
608 err_str = "Unable to send a nlmsg";
609 goto mapinfo_num_error;
611 pr_debug("%s: Sent mapping number = %d\n", __func__, mapping_num);
614 pr_info("%s: %s\n", __func__, err_str);
620 static int send_nlmsg_done(struct sk_buff *skb, u8 nl_client, int iwpm_pid)
622 struct nlmsghdr *nlh = NULL;
627 if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client,
628 RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) {
629 pr_warn("%s Unable to put NLMSG_DONE\n", __func__);
633 nlh->nlmsg_type = NLMSG_DONE;
634 ret = rdma_nl_unicast(skb, iwpm_pid);
636 pr_warn("%s Unable to send a nlmsg\n", __func__);
640 int iwpm_send_mapinfo(u8 nl_client, int iwpm_pid)
642 struct iwpm_mapping_info *map_info;
643 struct sk_buff *skb = NULL;
644 struct nlmsghdr *nlh;
645 int skb_num = 0, mapping_num = 0;
646 int i = 0, nlmsg_bytes = 0;
648 const char *err_str = "";
651 skb = dev_alloc_skb(NLMSG_GOODSIZE);
654 err_str = "Unable to allocate skb";
655 goto send_mapping_info_exit;
658 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
660 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
661 hlist_for_each_entry(map_info, &iwpm_hash_bucket[i],
663 if (map_info->nl_client != nl_client)
666 if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client,
667 RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) {
669 err_str = "Unable to put the nlmsg header";
670 goto send_mapping_info_unlock;
672 err_str = "Unable to put attribute of the nlmsg";
673 ret = ibnl_put_attr(skb, nlh,
674 sizeof(struct sockaddr_storage),
675 &map_info->local_sockaddr,
676 IWPM_NLA_MAPINFO_LOCAL_ADDR);
678 goto send_mapping_info_unlock;
680 ret = ibnl_put_attr(skb, nlh,
681 sizeof(struct sockaddr_storage),
682 &map_info->mapped_sockaddr,
683 IWPM_NLA_MAPINFO_MAPPED_ADDR);
685 goto send_mapping_info_unlock;
689 iwpm_print_sockaddr(&map_info->local_sockaddr,
690 "send_mapping_info: Local sockaddr:");
691 iwpm_print_sockaddr(&map_info->mapped_sockaddr,
692 "send_mapping_info: Mapped local sockaddr:");
694 nlmsg_bytes += nlh->nlmsg_len;
696 /* check if all mappings can fit in one skb */
697 if (NLMSG_GOODSIZE - nlmsg_bytes < nlh->nlmsg_len * 2) {
698 /* and leave room for NLMSG_DONE */
701 spin_unlock_irqrestore(&iwpm_mapinfo_lock,
704 ret = send_nlmsg_done(skb, nl_client, iwpm_pid);
707 err_str = "Unable to send map info";
708 goto send_mapping_info_exit;
710 if (skb_num == IWPM_MAPINFO_SKB_COUNT) {
712 err_str = "Insufficient skbs for map info";
713 goto send_mapping_info_exit;
715 skb = dev_alloc_skb(NLMSG_GOODSIZE);
718 err_str = "Unable to allocate skb";
719 goto send_mapping_info_exit;
721 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
725 send_mapping_info_unlock:
726 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
727 send_mapping_info_exit:
729 pr_warn("%s: %s (ret = %d)\n", __func__, err_str, ret);
734 send_nlmsg_done(skb, nl_client, iwpm_pid);
735 return send_mapinfo_num(mapping_num, nl_client, iwpm_pid);
738 int iwpm_mapinfo_available(void)
741 int full_bucket = 0, i = 0;
743 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
744 if (iwpm_hash_bucket) {
745 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
746 if (!hlist_empty(&iwpm_hash_bucket[i])) {
752 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);