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;
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);
148 int iwpm_remove_mapinfo(struct sockaddr_storage *local_sockaddr,
149 struct sockaddr_storage *mapped_local_addr)
151 struct hlist_node *tmp_hlist_node;
152 struct hlist_head *hash_bucket_head;
153 struct iwpm_mapping_info *map_info = NULL;
157 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
158 if (iwpm_hash_bucket) {
159 hash_bucket_head = get_mapinfo_hash_bucket(
162 if (!hash_bucket_head)
163 goto remove_mapinfo_exit;
165 hlist_for_each_entry_safe(map_info, tmp_hlist_node,
166 hash_bucket_head, hlist_node) {
168 if (!iwpm_compare_sockaddr(&map_info->mapped_sockaddr,
169 mapped_local_addr)) {
171 hlist_del_init(&map_info->hlist_node);
179 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
183 static void free_hash_bucket(void)
185 struct hlist_node *tmp_hlist_node;
186 struct iwpm_mapping_info *map_info;
190 /* remove all the mapinfo data from the list */
191 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
192 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
193 hlist_for_each_entry_safe(map_info, tmp_hlist_node,
194 &iwpm_hash_bucket[i], hlist_node) {
196 hlist_del_init(&map_info->hlist_node);
200 /* free the hash list */
201 kfree(iwpm_hash_bucket);
202 iwpm_hash_bucket = NULL;
203 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
206 static void free_reminfo_bucket(void)
208 struct hlist_node *tmp_hlist_node;
209 struct iwpm_remote_info *rem_info;
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) {
219 hlist_del_init(&rem_info->hlist_node);
223 /* free the hash list */
224 kfree(iwpm_reminfo_bucket);
225 iwpm_reminfo_bucket = NULL;
226 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
229 static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage *,
230 struct sockaddr_storage *);
232 void iwpm_add_remote_info(struct iwpm_remote_info *rem_info)
234 struct hlist_head *hash_bucket_head;
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);
245 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
248 int iwpm_get_remote_info(struct sockaddr_storage *mapped_loc_addr,
249 struct sockaddr_storage *mapped_rem_addr,
250 struct sockaddr_storage *remote_addr,
253 struct hlist_node *tmp_hlist_node;
254 struct hlist_head *hash_bucket_head;
255 struct iwpm_remote_info *rem_info = NULL;
259 if (!iwpm_valid_client(nl_client)) {
260 pr_info("%s: Invalid client = %d\n", __func__, nl_client);
263 spin_lock_irqsave(&iwpm_reminfo_lock, flags);
264 if (iwpm_reminfo_bucket) {
265 hash_bucket_head = get_reminfo_hash_bucket(
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) {
273 if (!iwpm_compare_sockaddr(&rem_info->mapped_loc_sockaddr,
275 !iwpm_compare_sockaddr(&rem_info->mapped_rem_sockaddr,
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:");
283 hlist_del_init(&rem_info->hlist_node);
290 get_remote_info_exit:
291 spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
295 struct iwpm_nlmsg_request *iwpm_get_nlmsg_request(__u32 nlmsg_seq,
296 u8 nl_client, gfp_t gfp)
298 struct iwpm_nlmsg_request *nlmsg_request = NULL;
301 nlmsg_request = kzalloc(sizeof(struct iwpm_nlmsg_request), gfp);
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);
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;
315 sema_init(&nlmsg_request->sem, 1);
316 down(&nlmsg_request->sem);
317 return nlmsg_request;
320 void iwpm_free_nlmsg_request(struct kref *kref)
322 struct iwpm_nlmsg_request *nlmsg_request;
325 nlmsg_request = container_of(kref, struct iwpm_nlmsg_request, kref);
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);
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);
337 struct iwpm_nlmsg_request *iwpm_find_nlmsg_request(__u32 echo_seq)
339 struct iwpm_nlmsg_request *nlmsg_request;
340 struct iwpm_nlmsg_request *found_request = NULL;
343 spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
344 list_for_each_entry(nlmsg_request, &iwpm_nlmsg_req_list,
346 if (nlmsg_request->nlmsg_seq == echo_seq) {
347 found_request = nlmsg_request;
348 kref_get(&nlmsg_request->kref);
352 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
353 return found_request;
356 int iwpm_wait_complete_req(struct iwpm_nlmsg_request *nlmsg_request)
360 ret = down_timeout(&nlmsg_request->sem, IWPM_NL_TIMEOUT);
363 pr_info("%s: Timeout %d sec for netlink request (seq = %u)\n",
364 __func__, (IWPM_NL_TIMEOUT/HZ), nlmsg_request->nlmsg_seq);
366 ret = nlmsg_request->err_code;
368 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
372 int iwpm_get_nlmsg_seq(void)
374 return atomic_inc_return(&iwpm_admin.nlmsg_seq);
377 int iwpm_valid_client(u8 nl_client)
379 return iwpm_admin.client_list[nl_client];
382 void iwpm_set_valid(u8 nl_client, int valid)
384 iwpm_admin.client_list[nl_client] = valid;
388 u32 iwpm_get_registration(u8 nl_client)
390 return iwpm_admin.reg_list[nl_client];
394 void iwpm_set_registration(u8 nl_client, u32 reg)
396 iwpm_admin.reg_list[nl_client] = reg;
400 u32 iwpm_check_registration(u8 nl_client, u32 reg)
402 return (iwpm_get_registration(nl_client) & reg);
405 int iwpm_compare_sockaddr(struct sockaddr_storage *a_sockaddr,
406 struct sockaddr_storage *b_sockaddr)
408 if (a_sockaddr->ss_family != b_sockaddr->ss_family)
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)
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)
431 pr_err("%s: Invalid sockaddr family\n", __func__);
436 struct sk_buff *iwpm_create_nlmsg(u32 nl_op, struct nlmsghdr **nlh,
439 struct sk_buff *skb = NULL;
441 skb = dev_alloc_skb(IWPM_MSG_SIZE);
443 pr_err("%s Unable to allocate skb\n", __func__);
444 goto create_nlmsg_exit;
446 if (!(ibnl_put_msg(skb, nlh, 0, 0, nl_client, nl_op,
448 pr_warn("%s: Unable to put the nlmsg header\n", __func__);
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)
462 const char *err_str = "";
464 ret = nlmsg_validate(cb->nlh, nlh_len, policy_max - 1, nlmsg_policy,
467 err_str = "Invalid attribute";
468 goto parse_nlmsg_error;
470 ret = nlmsg_parse(cb->nlh, nlh_len, nltb, policy_max - 1,
473 err_str = "Unable to parse the nlmsg";
474 goto parse_nlmsg_error;
476 ret = iwpm_validate_nlmsg_attr(nltb, policy_max);
478 err_str = "Invalid NULL attribute";
479 goto parse_nlmsg_error;
483 pr_warn("%s: %s (msg type %s ret = %d)\n",
484 __func__, err_str, msg_type, ret);
488 void iwpm_print_sockaddr(struct sockaddr_storage *sockaddr, char *msg)
490 struct sockaddr_in6 *sockaddr_v6;
491 struct sockaddr_in *sockaddr_v4;
493 switch (sockaddr->ss_family) {
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));
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));
513 static u32 iwpm_ipv6_jhash(struct sockaddr_in6 *ipv6_sockaddr)
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);
520 static u32 iwpm_ipv4_jhash(struct sockaddr_in *ipv4_sockaddr)
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);
527 static int get_hash_bucket(struct sockaddr_storage *a_sockaddr,
528 struct sockaddr_storage *b_sockaddr, u32 *hash)
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);
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);
540 pr_err("%s: Invalid sockaddr family\n", __func__);
544 if (a_hash == b_hash) /* if port mapper isn't available */
547 *hash = jhash_2words(a_hash, b_hash, 0);
551 static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage
552 *local_sockaddr, struct sockaddr_storage
558 ret = get_hash_bucket(local_sockaddr, mapped_sockaddr, &hash);
561 return &iwpm_hash_bucket[hash & IWPM_MAPINFO_HASH_MASK];
564 static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage
565 *mapped_loc_sockaddr, struct sockaddr_storage
566 *mapped_rem_sockaddr)
571 ret = get_hash_bucket(mapped_loc_sockaddr, mapped_rem_sockaddr, &hash);
574 return &iwpm_reminfo_bucket[hash & IWPM_REMINFO_HASH_MASK];
577 static int send_mapinfo_num(u32 mapping_num, u8 nl_client, int iwpm_pid)
579 struct sk_buff *skb = NULL;
580 struct nlmsghdr *nlh;
582 const char *err_str = "";
585 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_MAPINFO_NUM, &nlh, nl_client);
587 err_str = "Unable to create a nlmsg";
588 goto mapinfo_num_error;
590 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
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);
595 goto mapinfo_num_error;
596 ret = ibnl_put_attr(skb, nlh, sizeof(u32),
597 &mapping_num, IWPM_NLA_MAPINFO_SEND_NUM);
599 goto mapinfo_num_error;
603 ret = rdma_nl_unicast(skb, iwpm_pid);
606 err_str = "Unable to send a nlmsg";
607 goto mapinfo_num_error;
609 pr_debug("%s: Sent mapping number = %d\n", __func__, mapping_num);
612 pr_info("%s: %s\n", __func__, err_str);
618 static int send_nlmsg_done(struct sk_buff *skb, u8 nl_client, int iwpm_pid)
620 struct nlmsghdr *nlh = NULL;
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__);
631 nlh->nlmsg_type = NLMSG_DONE;
632 ret = rdma_nl_unicast(skb, iwpm_pid);
634 pr_warn("%s Unable to send a nlmsg\n", __func__);
638 int iwpm_send_mapinfo(u8 nl_client, int iwpm_pid)
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;
646 const char *err_str = "";
649 skb = dev_alloc_skb(NLMSG_GOODSIZE);
652 err_str = "Unable to allocate skb";
653 goto send_mapping_info_exit;
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],
660 if (map_info->nl_client != nl_client)
663 if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client,
664 RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) {
666 err_str = "Unable to put the nlmsg header";
667 goto send_mapping_info_unlock;
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);
675 goto send_mapping_info_unlock;
677 ret = ibnl_put_attr(skb, nlh,
678 sizeof(struct sockaddr_storage),
679 &map_info->mapped_sockaddr,
680 IWPM_NLA_MAPINFO_MAPPED_ADDR);
682 goto send_mapping_info_unlock;
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:");
691 nlmsg_bytes += nlh->nlmsg_len;
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 */
698 spin_unlock_irqrestore(&iwpm_mapinfo_lock,
701 ret = send_nlmsg_done(skb, nl_client, iwpm_pid);
704 err_str = "Unable to send map info";
705 goto send_mapping_info_exit;
707 if (skb_num == IWPM_MAPINFO_SKB_COUNT) {
709 err_str = "Insufficient skbs for map info";
710 goto send_mapping_info_exit;
712 skb = dev_alloc_skb(NLMSG_GOODSIZE);
715 err_str = "Unable to allocate skb";
716 goto send_mapping_info_exit;
718 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
722 send_mapping_info_unlock:
723 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
724 send_mapping_info_exit:
726 pr_warn("%s: %s (ret = %d)\n", __func__, err_str, ret);
731 send_nlmsg_done(skb, nl_client, iwpm_pid);
732 return send_mapinfo_num(mapping_num, nl_client, iwpm_pid);
735 int iwpm_mapinfo_available(void)
738 int full_bucket = 0, i = 0;
740 spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
741 if (iwpm_hash_bucket) {
742 for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
743 if (!hlist_empty(&iwpm_hash_bucket[i])) {
749 spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);