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 if (iwpm_valid_client(nl_client
))
59 mutex_lock(&iwpm_admin_lock
);
60 if (atomic_read(&iwpm_admin
.refcount
) == 0) {
61 iwpm_hash_bucket
= kzalloc(IWPM_MAPINFO_HASH_SIZE
*
62 sizeof(struct hlist_head
), GFP_KERNEL
);
63 if (!iwpm_hash_bucket
) {
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
);
75 atomic_inc(&iwpm_admin
.refcount
);
77 mutex_unlock(&iwpm_admin_lock
);
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",
86 EXPORT_SYMBOL(iwpm_init
);
88 static void free_hash_bucket(void);
89 static void free_reminfo_bucket(void);
91 int iwpm_exit(u8 nl_client
)
94 if (!iwpm_valid_client(nl_client
))
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__
);
102 if (atomic_dec_and_test(&iwpm_admin
.refcount
)) {
104 free_reminfo_bucket();
105 pr_debug("%s: Resources are destroyed\n", __func__
);
107 mutex_unlock(&iwpm_admin_lock
);
108 iwpm_set_valid(nl_client
, 0);
109 iwpm_set_registration(nl_client
, IWPM_REG_UNDEF
);
112 EXPORT_SYMBOL(iwpm_exit
);
114 static struct hlist_head
*get_mapinfo_hash_bucket(struct sockaddr_storage
*,
115 struct sockaddr_storage
*);
117 int iwpm_create_mapinfo(struct sockaddr_storage
*local_sockaddr
,
118 struct sockaddr_storage
*mapped_sockaddr
,
121 struct hlist_head
*hash_bucket_head
;
122 struct iwpm_mapping_info
*map_info
;
126 if (!iwpm_valid_client(nl_client
))
128 map_info
= kzalloc(sizeof(struct iwpm_mapping_info
), GFP_KERNEL
);
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
;
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
);
148 spin_unlock_irqrestore(&iwpm_mapinfo_lock
, flags
);
151 EXPORT_SYMBOL(iwpm_create_mapinfo
);
153 int iwpm_remove_mapinfo(struct sockaddr_storage
*local_sockaddr
,
154 struct sockaddr_storage
*mapped_local_addr
)
156 struct hlist_node
*tmp_hlist_node
;
157 struct hlist_head
*hash_bucket_head
;
158 struct iwpm_mapping_info
*map_info
= NULL
;
162 spin_lock_irqsave(&iwpm_mapinfo_lock
, flags
);
163 if (iwpm_hash_bucket
) {
164 hash_bucket_head
= get_mapinfo_hash_bucket(
167 if (!hash_bucket_head
)
168 goto remove_mapinfo_exit
;
170 hlist_for_each_entry_safe(map_info
, tmp_hlist_node
,
171 hash_bucket_head
, hlist_node
) {
173 if (!iwpm_compare_sockaddr(&map_info
->mapped_sockaddr
,
174 mapped_local_addr
)) {
176 hlist_del_init(&map_info
->hlist_node
);
184 spin_unlock_irqrestore(&iwpm_mapinfo_lock
, flags
);
187 EXPORT_SYMBOL(iwpm_remove_mapinfo
);
189 static void free_hash_bucket(void)
191 struct hlist_node
*tmp_hlist_node
;
192 struct iwpm_mapping_info
*map_info
;
196 /* remove all the mapinfo data from the list */
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
) {
202 hlist_del_init(&map_info
->hlist_node
);
206 /* free the hash list */
207 kfree(iwpm_hash_bucket
);
208 iwpm_hash_bucket
= NULL
;
209 spin_unlock_irqrestore(&iwpm_mapinfo_lock
, flags
);
212 static void free_reminfo_bucket(void)
214 struct hlist_node
*tmp_hlist_node
;
215 struct iwpm_remote_info
*rem_info
;
219 /* remove all the remote info from the list */
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
) {
225 hlist_del_init(&rem_info
->hlist_node
);
229 /* free the hash list */
230 kfree(iwpm_reminfo_bucket
);
231 iwpm_reminfo_bucket
= NULL
;
232 spin_unlock_irqrestore(&iwpm_reminfo_lock
, flags
);
235 static struct hlist_head
*get_reminfo_hash_bucket(struct sockaddr_storage
*,
236 struct sockaddr_storage
*);
238 void iwpm_add_remote_info(struct iwpm_remote_info
*rem_info
)
240 struct hlist_head
*hash_bucket_head
;
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
);
251 spin_unlock_irqrestore(&iwpm_reminfo_lock
, flags
);
254 int iwpm_get_remote_info(struct sockaddr_storage
*mapped_loc_addr
,
255 struct sockaddr_storage
*mapped_rem_addr
,
256 struct sockaddr_storage
*remote_addr
,
259 struct hlist_node
*tmp_hlist_node
;
260 struct hlist_head
*hash_bucket_head
;
261 struct iwpm_remote_info
*rem_info
= NULL
;
265 if (!iwpm_valid_client(nl_client
)) {
266 pr_info("%s: Invalid client = %d\n", __func__
, nl_client
);
269 spin_lock_irqsave(&iwpm_reminfo_lock
, flags
);
270 if (iwpm_reminfo_bucket
) {
271 hash_bucket_head
= get_reminfo_hash_bucket(
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
) {
279 if (!iwpm_compare_sockaddr(&rem_info
->mapped_loc_sockaddr
,
281 !iwpm_compare_sockaddr(&rem_info
->mapped_rem_sockaddr
,
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:");
289 hlist_del_init(&rem_info
->hlist_node
);
296 get_remote_info_exit
:
297 spin_unlock_irqrestore(&iwpm_reminfo_lock
, flags
);
300 EXPORT_SYMBOL(iwpm_get_remote_info
);
302 struct iwpm_nlmsg_request
*iwpm_get_nlmsg_request(__u32 nlmsg_seq
,
303 u8 nl_client
, gfp_t gfp
)
305 struct iwpm_nlmsg_request
*nlmsg_request
= NULL
;
308 nlmsg_request
= kzalloc(sizeof(struct iwpm_nlmsg_request
), gfp
);
312 spin_lock_irqsave(&iwpm_nlmsg_req_lock
, flags
);
313 list_add_tail(&nlmsg_request
->inprocess_list
, &iwpm_nlmsg_req_list
);
314 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock
, flags
);
316 kref_init(&nlmsg_request
->kref
);
317 kref_get(&nlmsg_request
->kref
);
318 nlmsg_request
->nlmsg_seq
= nlmsg_seq
;
319 nlmsg_request
->nl_client
= nl_client
;
320 nlmsg_request
->request_done
= 0;
321 nlmsg_request
->err_code
= 0;
322 sema_init(&nlmsg_request
->sem
, 1);
323 down(&nlmsg_request
->sem
);
324 return nlmsg_request
;
327 void iwpm_free_nlmsg_request(struct kref
*kref
)
329 struct iwpm_nlmsg_request
*nlmsg_request
;
332 nlmsg_request
= container_of(kref
, struct iwpm_nlmsg_request
, kref
);
334 spin_lock_irqsave(&iwpm_nlmsg_req_lock
, flags
);
335 list_del_init(&nlmsg_request
->inprocess_list
);
336 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock
, flags
);
338 if (!nlmsg_request
->request_done
)
339 pr_debug("%s Freeing incomplete nlmsg request (seq = %u).\n",
340 __func__
, nlmsg_request
->nlmsg_seq
);
341 kfree(nlmsg_request
);
344 struct iwpm_nlmsg_request
*iwpm_find_nlmsg_request(__u32 echo_seq
)
346 struct iwpm_nlmsg_request
*nlmsg_request
;
347 struct iwpm_nlmsg_request
*found_request
= NULL
;
350 spin_lock_irqsave(&iwpm_nlmsg_req_lock
, flags
);
351 list_for_each_entry(nlmsg_request
, &iwpm_nlmsg_req_list
,
353 if (nlmsg_request
->nlmsg_seq
== echo_seq
) {
354 found_request
= nlmsg_request
;
355 kref_get(&nlmsg_request
->kref
);
359 spin_unlock_irqrestore(&iwpm_nlmsg_req_lock
, flags
);
360 return found_request
;
363 int iwpm_wait_complete_req(struct iwpm_nlmsg_request
*nlmsg_request
)
367 ret
= down_timeout(&nlmsg_request
->sem
, IWPM_NL_TIMEOUT
);
370 pr_info("%s: Timeout %d sec for netlink request (seq = %u)\n",
371 __func__
, (IWPM_NL_TIMEOUT
/HZ
), nlmsg_request
->nlmsg_seq
);
373 ret
= nlmsg_request
->err_code
;
375 kref_put(&nlmsg_request
->kref
, iwpm_free_nlmsg_request
);
379 int iwpm_get_nlmsg_seq(void)
381 return atomic_inc_return(&iwpm_admin
.nlmsg_seq
);
384 int iwpm_valid_client(u8 nl_client
)
386 if (nl_client
>= RDMA_NL_NUM_CLIENTS
)
388 return iwpm_admin
.client_list
[nl_client
];
391 void iwpm_set_valid(u8 nl_client
, int valid
)
393 if (nl_client
>= RDMA_NL_NUM_CLIENTS
)
395 iwpm_admin
.client_list
[nl_client
] = valid
;
399 u32
iwpm_get_registration(u8 nl_client
)
401 return iwpm_admin
.reg_list
[nl_client
];
405 void iwpm_set_registration(u8 nl_client
, u32 reg
)
407 iwpm_admin
.reg_list
[nl_client
] = reg
;
411 u32
iwpm_check_registration(u8 nl_client
, u32 reg
)
413 return (iwpm_get_registration(nl_client
) & reg
);
416 int iwpm_compare_sockaddr(struct sockaddr_storage
*a_sockaddr
,
417 struct sockaddr_storage
*b_sockaddr
)
419 if (a_sockaddr
->ss_family
!= b_sockaddr
->ss_family
)
421 if (a_sockaddr
->ss_family
== AF_INET
) {
422 struct sockaddr_in
*a4_sockaddr
=
423 (struct sockaddr_in
*)a_sockaddr
;
424 struct sockaddr_in
*b4_sockaddr
=
425 (struct sockaddr_in
*)b_sockaddr
;
426 if (!memcmp(&a4_sockaddr
->sin_addr
,
427 &b4_sockaddr
->sin_addr
, sizeof(struct in_addr
))
428 && a4_sockaddr
->sin_port
== b4_sockaddr
->sin_port
)
431 } else if (a_sockaddr
->ss_family
== AF_INET6
) {
432 struct sockaddr_in6
*a6_sockaddr
=
433 (struct sockaddr_in6
*)a_sockaddr
;
434 struct sockaddr_in6
*b6_sockaddr
=
435 (struct sockaddr_in6
*)b_sockaddr
;
436 if (!memcmp(&a6_sockaddr
->sin6_addr
,
437 &b6_sockaddr
->sin6_addr
, sizeof(struct in6_addr
))
438 && a6_sockaddr
->sin6_port
== b6_sockaddr
->sin6_port
)
442 pr_err("%s: Invalid sockaddr family\n", __func__
);
447 struct sk_buff
*iwpm_create_nlmsg(u32 nl_op
, struct nlmsghdr
**nlh
,
450 struct sk_buff
*skb
= NULL
;
452 skb
= dev_alloc_skb(IWPM_MSG_SIZE
);
454 pr_err("%s Unable to allocate skb\n", __func__
);
455 goto create_nlmsg_exit
;
457 if (!(ibnl_put_msg(skb
, nlh
, 0, 0, nl_client
, nl_op
,
459 pr_warn("%s: Unable to put the nlmsg header\n", __func__
);
467 int iwpm_parse_nlmsg(struct netlink_callback
*cb
, int policy_max
,
468 const struct nla_policy
*nlmsg_policy
,
469 struct nlattr
*nltb
[], const char *msg_type
)
473 const char *err_str
= "";
475 ret
= nlmsg_validate(cb
->nlh
, nlh_len
, policy_max
- 1, nlmsg_policy
,
478 err_str
= "Invalid attribute";
479 goto parse_nlmsg_error
;
481 ret
= nlmsg_parse(cb
->nlh
, nlh_len
, nltb
, policy_max
- 1,
484 err_str
= "Unable to parse the nlmsg";
485 goto parse_nlmsg_error
;
487 ret
= iwpm_validate_nlmsg_attr(nltb
, policy_max
);
489 err_str
= "Invalid NULL attribute";
490 goto parse_nlmsg_error
;
494 pr_warn("%s: %s (msg type %s ret = %d)\n",
495 __func__
, err_str
, msg_type
, ret
);
499 void iwpm_print_sockaddr(struct sockaddr_storage
*sockaddr
, char *msg
)
501 struct sockaddr_in6
*sockaddr_v6
;
502 struct sockaddr_in
*sockaddr_v4
;
504 switch (sockaddr
->ss_family
) {
506 sockaddr_v4
= (struct sockaddr_in
*)sockaddr
;
507 pr_debug("%s IPV4 %pI4: %u(0x%04X)\n",
508 msg
, &sockaddr_v4
->sin_addr
,
509 ntohs(sockaddr_v4
->sin_port
),
510 ntohs(sockaddr_v4
->sin_port
));
513 sockaddr_v6
= (struct sockaddr_in6
*)sockaddr
;
514 pr_debug("%s IPV6 %pI6: %u(0x%04X)\n",
515 msg
, &sockaddr_v6
->sin6_addr
,
516 ntohs(sockaddr_v6
->sin6_port
),
517 ntohs(sockaddr_v6
->sin6_port
));
524 static u32
iwpm_ipv6_jhash(struct sockaddr_in6
*ipv6_sockaddr
)
526 u32 ipv6_hash
= jhash(&ipv6_sockaddr
->sin6_addr
, sizeof(struct in6_addr
), 0);
527 u32 hash
= jhash_2words(ipv6_hash
, (__force u32
) ipv6_sockaddr
->sin6_port
, 0);
531 static u32
iwpm_ipv4_jhash(struct sockaddr_in
*ipv4_sockaddr
)
533 u32 ipv4_hash
= jhash(&ipv4_sockaddr
->sin_addr
, sizeof(struct in_addr
), 0);
534 u32 hash
= jhash_2words(ipv4_hash
, (__force u32
) ipv4_sockaddr
->sin_port
, 0);
538 static int get_hash_bucket(struct sockaddr_storage
*a_sockaddr
,
539 struct sockaddr_storage
*b_sockaddr
, u32
*hash
)
543 if (a_sockaddr
->ss_family
== AF_INET
) {
544 a_hash
= iwpm_ipv4_jhash((struct sockaddr_in
*) a_sockaddr
);
545 b_hash
= iwpm_ipv4_jhash((struct sockaddr_in
*) b_sockaddr
);
547 } else if (a_sockaddr
->ss_family
== AF_INET6
) {
548 a_hash
= iwpm_ipv6_jhash((struct sockaddr_in6
*) a_sockaddr
);
549 b_hash
= iwpm_ipv6_jhash((struct sockaddr_in6
*) b_sockaddr
);
551 pr_err("%s: Invalid sockaddr family\n", __func__
);
555 if (a_hash
== b_hash
) /* if port mapper isn't available */
558 *hash
= jhash_2words(a_hash
, b_hash
, 0);
562 static struct hlist_head
*get_mapinfo_hash_bucket(struct sockaddr_storage
563 *local_sockaddr
, struct sockaddr_storage
569 ret
= get_hash_bucket(local_sockaddr
, mapped_sockaddr
, &hash
);
572 return &iwpm_hash_bucket
[hash
& IWPM_MAPINFO_HASH_MASK
];
575 static struct hlist_head
*get_reminfo_hash_bucket(struct sockaddr_storage
576 *mapped_loc_sockaddr
, struct sockaddr_storage
577 *mapped_rem_sockaddr
)
582 ret
= get_hash_bucket(mapped_loc_sockaddr
, mapped_rem_sockaddr
, &hash
);
585 return &iwpm_reminfo_bucket
[hash
& IWPM_REMINFO_HASH_MASK
];
588 static int send_mapinfo_num(u32 mapping_num
, u8 nl_client
, int iwpm_pid
)
590 struct sk_buff
*skb
= NULL
;
591 struct nlmsghdr
*nlh
;
593 const char *err_str
= "";
596 skb
= iwpm_create_nlmsg(RDMA_NL_IWPM_MAPINFO_NUM
, &nlh
, nl_client
);
598 err_str
= "Unable to create a nlmsg";
599 goto mapinfo_num_error
;
601 nlh
->nlmsg_seq
= iwpm_get_nlmsg_seq();
603 err_str
= "Unable to put attribute of mapinfo number nlmsg";
604 ret
= ibnl_put_attr(skb
, nlh
, sizeof(u32
), &msg_seq
, IWPM_NLA_MAPINFO_SEQ
);
606 goto mapinfo_num_error
;
607 ret
= ibnl_put_attr(skb
, nlh
, sizeof(u32
),
608 &mapping_num
, IWPM_NLA_MAPINFO_SEND_NUM
);
610 goto mapinfo_num_error
;
611 ret
= ibnl_unicast(skb
, nlh
, iwpm_pid
);
614 err_str
= "Unable to send a nlmsg";
615 goto mapinfo_num_error
;
617 pr_debug("%s: Sent mapping number = %d\n", __func__
, mapping_num
);
620 pr_info("%s: %s\n", __func__
, err_str
);
626 static int send_nlmsg_done(struct sk_buff
*skb
, u8 nl_client
, int iwpm_pid
)
628 struct nlmsghdr
*nlh
= NULL
;
633 if (!(ibnl_put_msg(skb
, &nlh
, 0, 0, nl_client
,
634 RDMA_NL_IWPM_MAPINFO
, NLM_F_MULTI
))) {
635 pr_warn("%s Unable to put NLMSG_DONE\n", __func__
);
639 nlh
->nlmsg_type
= NLMSG_DONE
;
640 ret
= ibnl_unicast(skb
, (struct nlmsghdr
*)skb
->data
, iwpm_pid
);
642 pr_warn("%s Unable to send a nlmsg\n", __func__
);
646 int iwpm_send_mapinfo(u8 nl_client
, int iwpm_pid
)
648 struct iwpm_mapping_info
*map_info
;
649 struct sk_buff
*skb
= NULL
;
650 struct nlmsghdr
*nlh
;
651 int skb_num
= 0, mapping_num
= 0;
652 int i
= 0, nlmsg_bytes
= 0;
654 const char *err_str
= "";
657 skb
= dev_alloc_skb(NLMSG_GOODSIZE
);
660 err_str
= "Unable to allocate skb";
661 goto send_mapping_info_exit
;
664 spin_lock_irqsave(&iwpm_mapinfo_lock
, flags
);
665 for (i
= 0; i
< IWPM_MAPINFO_HASH_SIZE
; i
++) {
666 hlist_for_each_entry(map_info
, &iwpm_hash_bucket
[i
],
668 if (map_info
->nl_client
!= nl_client
)
671 if (!(ibnl_put_msg(skb
, &nlh
, 0, 0, nl_client
,
672 RDMA_NL_IWPM_MAPINFO
, NLM_F_MULTI
))) {
674 err_str
= "Unable to put the nlmsg header";
675 goto send_mapping_info_unlock
;
677 err_str
= "Unable to put attribute of the nlmsg";
678 ret
= ibnl_put_attr(skb
, nlh
,
679 sizeof(struct sockaddr_storage
),
680 &map_info
->local_sockaddr
,
681 IWPM_NLA_MAPINFO_LOCAL_ADDR
);
683 goto send_mapping_info_unlock
;
685 ret
= ibnl_put_attr(skb
, nlh
,
686 sizeof(struct sockaddr_storage
),
687 &map_info
->mapped_sockaddr
,
688 IWPM_NLA_MAPINFO_MAPPED_ADDR
);
690 goto send_mapping_info_unlock
;
692 iwpm_print_sockaddr(&map_info
->local_sockaddr
,
693 "send_mapping_info: Local sockaddr:");
694 iwpm_print_sockaddr(&map_info
->mapped_sockaddr
,
695 "send_mapping_info: Mapped local sockaddr:");
697 nlmsg_bytes
+= nlh
->nlmsg_len
;
699 /* check if all mappings can fit in one skb */
700 if (NLMSG_GOODSIZE
- nlmsg_bytes
< nlh
->nlmsg_len
* 2) {
701 /* and leave room for NLMSG_DONE */
704 spin_unlock_irqrestore(&iwpm_mapinfo_lock
,
707 ret
= send_nlmsg_done(skb
, nl_client
, iwpm_pid
);
710 err_str
= "Unable to send map info";
711 goto send_mapping_info_exit
;
713 if (skb_num
== IWPM_MAPINFO_SKB_COUNT
) {
715 err_str
= "Insufficient skbs for map info";
716 goto send_mapping_info_exit
;
718 skb
= dev_alloc_skb(NLMSG_GOODSIZE
);
721 err_str
= "Unable to allocate skb";
722 goto send_mapping_info_exit
;
724 spin_lock_irqsave(&iwpm_mapinfo_lock
, flags
);
728 send_mapping_info_unlock
:
729 spin_unlock_irqrestore(&iwpm_mapinfo_lock
, flags
);
730 send_mapping_info_exit
:
732 pr_warn("%s: %s (ret = %d)\n", __func__
, err_str
, ret
);
737 send_nlmsg_done(skb
, nl_client
, iwpm_pid
);
738 return send_mapinfo_num(mapping_num
, nl_client
, iwpm_pid
);
741 int iwpm_mapinfo_available(void)
744 int full_bucket
= 0, i
= 0;
746 spin_lock_irqsave(&iwpm_mapinfo_lock
, flags
);
747 if (iwpm_hash_bucket
) {
748 for (i
= 0; i
< IWPM_MAPINFO_HASH_SIZE
; i
++) {
749 if (!hlist_empty(&iwpm_hash_bucket
[i
])) {
755 spin_unlock_irqrestore(&iwpm_mapinfo_lock
, flags
);