2 * Copyright (C) 2008-2010 B.A.T.M.A.N. contributors:
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
24 #include "translation-table.h"
26 #include "soft-interface.h"
27 #include "hard-interface.h"
30 /* Returns the smallest signed integer in two's complement with the sizeof x */
31 #define smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u)))
33 /* Checks if a sequence number x is a predecessor/successor of y.
34 they handle overflows/underflows and can correctly check for a
35 predecessor/successor unless the variable sequence number has grown by
36 more then 2**(bitwidth(x)-1)-1.
37 This means that for a uint8_t with the maximum value 255, it would think:
38 * when adding nothing - it is neither a predecessor nor a successor
39 * before adding more than 127 to the starting value - it is a predecessor,
40 * when adding 128 - it is neither a predecessor nor a successor,
41 * after adding more than 127 to the starting value - it is a successor */
42 #define seq_before(x, y) ({typeof(x) _dummy = (x - y); \
43 _dummy > smallest_signed_int(_dummy); })
44 #define seq_after(x, y) seq_before(y, x)
46 static struct hashtable_t
*vis_hash
;
47 static DEFINE_SPINLOCK(vis_hash_lock
);
48 static DEFINE_SPINLOCK(recv_list_lock
);
49 static struct vis_info
*my_vis_info
;
50 static struct list_head send_list
; /* always locked with vis_hash_lock */
52 static void start_vis_timer(void);
55 static void free_info(struct kref
*ref
)
57 struct vis_info
*info
= container_of(ref
, struct vis_info
, refcount
);
58 struct recvlist_node
*entry
, *tmp
;
61 list_del_init(&info
->send_list
);
62 spin_lock_irqsave(&recv_list_lock
, flags
);
63 list_for_each_entry_safe(entry
, tmp
, &info
->recv_list
, list
) {
64 list_del(&entry
->list
);
67 spin_unlock_irqrestore(&recv_list_lock
, flags
);
71 /* Compare two vis packets, used by the hashing algorithm */
72 static int vis_info_cmp(void *data1
, void *data2
)
74 struct vis_info
*d1
, *d2
;
77 return compare_orig(d1
->packet
.vis_orig
, d2
->packet
.vis_orig
);
80 /* hash function to choose an entry in a hash table of given size */
81 /* hash algorithm from http://en.wikipedia.org/wiki/Hash_table */
82 static int vis_info_choose(void *data
, int size
)
84 struct vis_info
*vis_info
= data
;
89 key
= vis_info
->packet
.vis_orig
;
90 for (i
= 0; i
< ETH_ALEN
; i
++) {
103 /* insert interface to the list of interfaces of one originator, if it
104 * does not already exist in the list */
105 static void vis_data_insert_interface(const uint8_t *interface
,
106 struct hlist_head
*if_list
,
109 struct if_list_entry
*entry
;
110 struct hlist_node
*pos
;
112 hlist_for_each_entry(entry
, pos
, if_list
, list
) {
113 if (compare_orig(entry
->addr
, (void *)interface
))
117 /* its a new address, add it to the list */
118 entry
= kmalloc(sizeof(*entry
), GFP_ATOMIC
);
121 memcpy(entry
->addr
, interface
, ETH_ALEN
);
122 entry
->primary
= primary
;
123 hlist_add_head(&entry
->list
, if_list
);
126 static ssize_t
vis_data_read_prim_sec(char *buff
, struct hlist_head
*if_list
)
128 struct if_list_entry
*entry
;
129 struct hlist_node
*pos
;
130 char tmp_addr_str
[ETH_STR_LEN
];
133 hlist_for_each_entry(entry
, pos
, if_list
, list
) {
135 len
+= sprintf(buff
+ len
, "PRIMARY, ");
137 addr_to_string(tmp_addr_str
, entry
->addr
);
138 len
+= sprintf(buff
+ len
, "SEC %s, ", tmp_addr_str
);
145 static size_t vis_data_count_prim_sec(struct hlist_head
*if_list
)
147 struct if_list_entry
*entry
;
148 struct hlist_node
*pos
;
151 hlist_for_each_entry(entry
, pos
, if_list
, list
) {
162 static ssize_t
vis_data_read_entry(char *buff
, struct vis_info_entry
*entry
,
163 uint8_t *src
, bool primary
)
167 /* maximal length: max(4+17+2, 3+17+1+3+2) == 26 */
168 addr_to_string(to
, entry
->dest
);
169 if (primary
&& entry
->quality
== 0)
170 return sprintf(buff
, "HNA %s, ", to
);
171 else if (compare_orig(entry
->src
, src
))
172 return sprintf(buff
, "TQ %s %d, ", to
, entry
->quality
);
177 int vis_seq_print_text(struct seq_file
*seq
, void *offset
)
180 HASHIT(hashit_count
);
181 struct vis_info
*info
;
182 struct vis_info_entry
*entries
;
183 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
184 struct bat_priv
*bat_priv
= netdev_priv(net_dev
);
185 HLIST_HEAD(vis_if_list
);
186 struct if_list_entry
*entry
;
187 struct hlist_node
*pos
, *n
;
189 char tmp_addr_str
[ETH_STR_LEN
];
191 int vis_server
= atomic_read(&bat_priv
->vis_mode
);
192 size_t buff_pos
, buf_size
;
195 if ((!bat_priv
->primary_if
) ||
196 (vis_server
== VIS_TYPE_CLIENT_UPDATE
))
200 /* Estimate length */
201 spin_lock_irqsave(&vis_hash_lock
, flags
);
202 while (hash_iterate(vis_hash
, &hashit_count
)) {
203 info
= hashit_count
.bucket
->data
;
204 entries
= (struct vis_info_entry
*)
205 ((char *)info
+ sizeof(struct vis_info
));
207 for (i
= 0; i
< info
->packet
.entries
; i
++) {
208 if (entries
[i
].quality
== 0)
210 vis_data_insert_interface(entries
[i
].src
, &vis_if_list
,
211 compare_orig(entries
[i
].src
,
212 info
->packet
.vis_orig
));
215 hlist_for_each_entry(entry
, pos
, &vis_if_list
, list
) {
216 buf_size
+= 18 + 26 * info
->packet
.entries
;
218 /* add primary/secondary records */
219 if (compare_orig(entry
->addr
, info
->packet
.vis_orig
))
221 vis_data_count_prim_sec(&vis_if_list
);
226 hlist_for_each_entry_safe(entry
, pos
, n
, &vis_if_list
, list
) {
227 hlist_del(&entry
->list
);
232 buff
= kmalloc(buf_size
, GFP_ATOMIC
);
234 spin_unlock_irqrestore(&vis_hash_lock
, flags
);
240 while (hash_iterate(vis_hash
, &hashit
)) {
241 info
= hashit
.bucket
->data
;
242 entries
= (struct vis_info_entry
*)
243 ((char *)info
+ sizeof(struct vis_info
));
245 for (i
= 0; i
< info
->packet
.entries
; i
++) {
246 if (entries
[i
].quality
== 0)
248 vis_data_insert_interface(entries
[i
].src
, &vis_if_list
,
249 compare_orig(entries
[i
].src
,
250 info
->packet
.vis_orig
));
253 hlist_for_each_entry(entry
, pos
, &vis_if_list
, list
) {
254 addr_to_string(tmp_addr_str
, entry
->addr
);
255 buff_pos
+= sprintf(buff
+ buff_pos
, "%s,",
258 for (i
= 0; i
< info
->packet
.entries
; i
++)
259 buff_pos
+= vis_data_read_entry(buff
+ buff_pos
,
264 /* add primary/secondary records */
265 if (compare_orig(entry
->addr
, info
->packet
.vis_orig
))
267 vis_data_read_prim_sec(buff
+ buff_pos
,
270 buff_pos
+= sprintf(buff
+ buff_pos
, "\n");
273 hlist_for_each_entry_safe(entry
, pos
, n
, &vis_if_list
, list
) {
274 hlist_del(&entry
->list
);
279 spin_unlock_irqrestore(&vis_hash_lock
, flags
);
281 seq_printf(seq
, "%s", buff
);
287 /* add the info packet to the send list, if it was not
288 * already linked in. */
289 static void send_list_add(struct vis_info
*info
)
291 if (list_empty(&info
->send_list
)) {
292 kref_get(&info
->refcount
);
293 list_add_tail(&info
->send_list
, &send_list
);
297 /* delete the info packet from the send list, if it was
299 static void send_list_del(struct vis_info
*info
)
301 if (!list_empty(&info
->send_list
)) {
302 list_del_init(&info
->send_list
);
303 kref_put(&info
->refcount
, free_info
);
307 /* tries to add one entry to the receive list. */
308 static void recv_list_add(struct list_head
*recv_list
, char *mac
)
310 struct recvlist_node
*entry
;
313 entry
= kmalloc(sizeof(struct recvlist_node
), GFP_ATOMIC
);
317 memcpy(entry
->mac
, mac
, ETH_ALEN
);
318 spin_lock_irqsave(&recv_list_lock
, flags
);
319 list_add_tail(&entry
->list
, recv_list
);
320 spin_unlock_irqrestore(&recv_list_lock
, flags
);
323 /* returns 1 if this mac is in the recv_list */
324 static int recv_list_is_in(struct list_head
*recv_list
, char *mac
)
326 struct recvlist_node
*entry
;
329 spin_lock_irqsave(&recv_list_lock
, flags
);
330 list_for_each_entry(entry
, recv_list
, list
) {
331 if (memcmp(entry
->mac
, mac
, ETH_ALEN
) == 0) {
332 spin_unlock_irqrestore(&recv_list_lock
, flags
);
336 spin_unlock_irqrestore(&recv_list_lock
, flags
);
340 /* try to add the packet to the vis_hash. return NULL if invalid (e.g. too old,
341 * broken.. ). vis hash must be locked outside. is_new is set when the packet
342 * is newer than old entries in the hash. */
343 static struct vis_info
*add_packet(struct vis_packet
*vis_packet
,
344 int vis_info_len
, int *is_new
,
347 struct vis_info
*info
, *old_info
;
348 struct vis_info search_elem
;
352 if (vis_hash
== NULL
)
355 /* see if the packet is already in vis_hash */
356 memcpy(search_elem
.packet
.vis_orig
, vis_packet
->vis_orig
, ETH_ALEN
);
357 old_info
= hash_find(vis_hash
, &search_elem
);
359 if (old_info
!= NULL
) {
360 if (!seq_after(ntohl(vis_packet
->seqno
),
361 ntohl(old_info
->packet
.seqno
))) {
362 if (old_info
->packet
.seqno
== vis_packet
->seqno
) {
363 recv_list_add(&old_info
->recv_list
,
364 vis_packet
->sender_orig
);
367 /* newer packet is already in hash. */
371 /* remove old entry */
372 hash_remove(vis_hash
, old_info
);
373 send_list_del(old_info
);
374 kref_put(&old_info
->refcount
, free_info
);
377 info
= kmalloc(sizeof(struct vis_info
) + vis_info_len
, GFP_ATOMIC
);
381 kref_init(&info
->refcount
);
382 INIT_LIST_HEAD(&info
->send_list
);
383 INIT_LIST_HEAD(&info
->recv_list
);
384 info
->first_seen
= jiffies
;
385 memcpy(&info
->packet
, vis_packet
,
386 sizeof(struct vis_packet
) + vis_info_len
);
388 /* initialize and add new packet. */
391 /* Make it a broadcast packet, if required */
393 memcpy(info
->packet
.target_orig
, broadcast_addr
, ETH_ALEN
);
395 /* repair if entries is longer than packet. */
396 if (info
->packet
.entries
* sizeof(struct vis_info_entry
) > vis_info_len
)
397 info
->packet
.entries
= vis_info_len
/
398 sizeof(struct vis_info_entry
);
400 recv_list_add(&info
->recv_list
, info
->packet
.sender_orig
);
403 if (hash_add(vis_hash
, info
) < 0) {
404 /* did not work (for some reason) */
405 kref_put(&old_info
->refcount
, free_info
);
412 /* handle the server sync packet, forward if needed. */
413 void receive_server_sync_packet(struct bat_priv
*bat_priv
,
414 struct vis_packet
*vis_packet
,
417 struct vis_info
*info
;
418 int is_new
, make_broadcast
;
420 int vis_server
= atomic_read(&bat_priv
->vis_mode
);
422 make_broadcast
= (vis_server
== VIS_TYPE_SERVER_SYNC
);
424 spin_lock_irqsave(&vis_hash_lock
, flags
);
425 info
= add_packet(vis_packet
, vis_info_len
, &is_new
, make_broadcast
);
429 /* only if we are server ourselves and packet is newer than the one in
431 if (vis_server
== VIS_TYPE_SERVER_SYNC
&& is_new
)
434 spin_unlock_irqrestore(&vis_hash_lock
, flags
);
437 /* handle an incoming client update packet and schedule forward if needed. */
438 void receive_client_update_packet(struct bat_priv
*bat_priv
,
439 struct vis_packet
*vis_packet
,
442 struct vis_info
*info
;
445 int vis_server
= atomic_read(&bat_priv
->vis_mode
);
448 /* clients shall not broadcast. */
449 if (is_bcast(vis_packet
->target_orig
))
452 /* Are we the target for this VIS packet? */
453 if (vis_server
== VIS_TYPE_SERVER_SYNC
&&
454 is_my_mac(vis_packet
->target_orig
))
457 spin_lock_irqsave(&vis_hash_lock
, flags
);
458 info
= add_packet(vis_packet
, vis_info_len
, &is_new
, are_target
);
461 /* note that outdated packets will be dropped at this point. */
464 /* send only if we're the target server or ... */
465 if (are_target
&& is_new
) {
466 info
->packet
.vis_type
= VIS_TYPE_SERVER_SYNC
; /* upgrade! */
469 /* ... we're not the recipient (and thus need to forward). */
470 } else if (!is_my_mac(info
->packet
.target_orig
)) {
474 spin_unlock_irqrestore(&vis_hash_lock
, flags
);
477 /* Walk the originators and find the VIS server with the best tq. Set the packet
478 * address to its address and return the best_tq.
480 * Must be called with the originator hash locked */
481 static int find_best_vis_server(struct vis_info
*info
)
484 struct orig_node
*orig_node
;
487 while (hash_iterate(orig_hash
, &hashit
)) {
488 orig_node
= hashit
.bucket
->data
;
489 if ((orig_node
!= NULL
) &&
490 (orig_node
->router
!= NULL
) &&
491 (orig_node
->flags
& VIS_SERVER
) &&
492 (orig_node
->router
->tq_avg
> best_tq
)) {
493 best_tq
= orig_node
->router
->tq_avg
;
494 memcpy(info
->packet
.target_orig
, orig_node
->orig
,
501 /* Return true if the vis packet is full. */
502 static bool vis_packet_full(struct vis_info
*info
)
504 if (info
->packet
.entries
+ 1 >
505 (1000 - sizeof(struct vis_info
)) / sizeof(struct vis_info_entry
))
510 /* generates a packet of own vis data,
511 * returns 0 on success, -1 if no packet could be generated */
512 static int generate_vis_packet(struct bat_priv
*bat_priv
)
514 HASHIT(hashit_local
);
515 HASHIT(hashit_global
);
516 struct orig_node
*orig_node
;
517 struct vis_info
*info
= (struct vis_info
*)my_vis_info
;
518 struct vis_info_entry
*entry
, *entry_array
;
519 struct hna_local_entry
*hna_local_entry
;
523 info
->first_seen
= jiffies
;
524 info
->packet
.vis_type
= atomic_read(&bat_priv
->vis_mode
);
526 spin_lock_irqsave(&orig_hash_lock
, flags
);
527 memcpy(info
->packet
.target_orig
, broadcast_addr
, ETH_ALEN
);
528 info
->packet
.ttl
= TTL
;
529 info
->packet
.seqno
= htonl(ntohl(info
->packet
.seqno
) + 1);
530 info
->packet
.entries
= 0;
532 if (info
->packet
.vis_type
== VIS_TYPE_CLIENT_UPDATE
) {
533 best_tq
= find_best_vis_server(info
);
535 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
540 entry_array
= (struct vis_info_entry
*)
541 ((char *)info
+ sizeof(struct vis_info
));
543 while (hash_iterate(orig_hash
, &hashit_global
)) {
544 orig_node
= hashit_global
.bucket
->data
;
545 if (orig_node
->router
!= NULL
546 && compare_orig(orig_node
->router
->addr
,
548 && (orig_node
->router
->if_incoming
->if_status
==
550 && orig_node
->router
->tq_avg
> 0) {
552 /* fill one entry into buffer. */
553 entry
= &entry_array
[info
->packet
.entries
];
555 orig_node
->router
->if_incoming
->net_dev
->dev_addr
,
557 memcpy(entry
->dest
, orig_node
->orig
, ETH_ALEN
);
558 entry
->quality
= orig_node
->router
->tq_avg
;
559 info
->packet
.entries
++;
561 if (vis_packet_full(info
)) {
562 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
568 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
570 spin_lock_irqsave(&hna_local_hash_lock
, flags
);
571 while (hash_iterate(hna_local_hash
, &hashit_local
)) {
572 hna_local_entry
= hashit_local
.bucket
->data
;
573 entry
= &entry_array
[info
->packet
.entries
];
574 memset(entry
->src
, 0, ETH_ALEN
);
575 memcpy(entry
->dest
, hna_local_entry
->addr
, ETH_ALEN
);
576 entry
->quality
= 0; /* 0 means HNA */
577 info
->packet
.entries
++;
579 if (vis_packet_full(info
)) {
580 spin_unlock_irqrestore(&hna_local_hash_lock
, flags
);
584 spin_unlock_irqrestore(&hna_local_hash_lock
, flags
);
588 /* free old vis packets. Must be called with this vis_hash_lock
590 static void purge_vis_packets(void)
593 struct vis_info
*info
;
595 while (hash_iterate(vis_hash
, &hashit
)) {
596 info
= hashit
.bucket
->data
;
597 if (info
== my_vis_info
) /* never purge own data. */
599 if (time_after(jiffies
,
600 info
->first_seen
+ VIS_TIMEOUT
* HZ
)) {
601 hash_remove_bucket(vis_hash
, &hashit
);
603 kref_put(&info
->refcount
, free_info
);
608 static void broadcast_vis_packet(struct vis_info
*info
, int packet_length
)
611 struct orig_node
*orig_node
;
613 struct batman_if
*batman_if
;
614 uint8_t dstaddr
[ETH_ALEN
];
616 spin_lock_irqsave(&orig_hash_lock
, flags
);
618 /* send to all routers in range. */
619 while (hash_iterate(orig_hash
, &hashit
)) {
620 orig_node
= hashit
.bucket
->data
;
622 /* if it's a vis server and reachable, send it. */
623 if ((!orig_node
) || (!orig_node
->router
))
625 if (!(orig_node
->flags
& VIS_SERVER
))
627 /* don't send it if we already received the packet from
629 if (recv_list_is_in(&info
->recv_list
, orig_node
->orig
))
632 memcpy(info
->packet
.target_orig
, orig_node
->orig
, ETH_ALEN
);
633 batman_if
= orig_node
->router
->if_incoming
;
634 memcpy(dstaddr
, orig_node
->router
->addr
, ETH_ALEN
);
635 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
637 send_raw_packet((unsigned char *)&info
->packet
,
638 packet_length
, batman_if
, dstaddr
);
640 spin_lock_irqsave(&orig_hash_lock
, flags
);
643 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
644 memcpy(info
->packet
.target_orig
, broadcast_addr
, ETH_ALEN
);
647 static void unicast_vis_packet(struct vis_info
*info
, int packet_length
)
649 struct orig_node
*orig_node
;
651 struct batman_if
*batman_if
;
652 uint8_t dstaddr
[ETH_ALEN
];
654 spin_lock_irqsave(&orig_hash_lock
, flags
);
655 orig_node
= ((struct orig_node
*)
656 hash_find(orig_hash
, info
->packet
.target_orig
));
658 if ((!orig_node
) || (!orig_node
->router
))
661 /* don't lock while sending the packets ... we therefore
662 * copy the required data before sending */
663 batman_if
= orig_node
->router
->if_incoming
;
664 memcpy(dstaddr
, orig_node
->router
->addr
, ETH_ALEN
);
665 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
667 send_raw_packet((unsigned char *)&info
->packet
,
668 packet_length
, batman_if
, dstaddr
);
672 spin_unlock_irqrestore(&orig_hash_lock
, flags
);
675 /* only send one vis packet. called from send_vis_packets() */
676 static void send_vis_packet(struct vis_info
*info
)
680 if (info
->packet
.ttl
< 2) {
681 pr_warning("Error - can't send vis packet: ttl exceeded\n");
685 memcpy(info
->packet
.sender_orig
, main_if_addr
, ETH_ALEN
);
688 packet_length
= sizeof(struct vis_packet
) +
689 info
->packet
.entries
* sizeof(struct vis_info_entry
);
691 if (is_bcast(info
->packet
.target_orig
))
692 broadcast_vis_packet(info
, packet_length
);
694 unicast_vis_packet(info
, packet_length
);
695 info
->packet
.ttl
++; /* restore TTL */
698 /* called from timer; send (and maybe generate) vis packet. */
699 static void send_vis_packets(struct work_struct
*work
)
701 struct vis_info
*info
, *temp
;
703 struct bat_priv
*bat_priv
= netdev_priv(soft_device
);
705 spin_lock_irqsave(&vis_hash_lock
, flags
);
709 if (generate_vis_packet(bat_priv
) == 0) {
710 /* schedule if generation was successful */
711 send_list_add(my_vis_info
);
714 list_for_each_entry_safe(info
, temp
, &send_list
, send_list
) {
716 kref_get(&info
->refcount
);
717 spin_unlock_irqrestore(&vis_hash_lock
, flags
);
719 send_vis_packet(info
);
721 spin_lock_irqsave(&vis_hash_lock
, flags
);
723 kref_put(&info
->refcount
, free_info
);
725 spin_unlock_irqrestore(&vis_hash_lock
, flags
);
728 static DECLARE_DELAYED_WORK(vis_timer_wq
, send_vis_packets
);
730 /* init the vis server. this may only be called when if_list is already
731 * initialized (e.g. bat0 is initialized, interfaces have been added) */
738 spin_lock_irqsave(&vis_hash_lock
, flags
);
740 vis_hash
= hash_new(256, vis_info_cmp
, vis_info_choose
);
742 pr_err("Can't initialize vis_hash\n");
746 my_vis_info
= kmalloc(1000, GFP_ATOMIC
);
748 pr_err("Can't initialize vis packet\n");
752 /* prefill the vis info */
753 my_vis_info
->first_seen
= jiffies
- msecs_to_jiffies(VIS_INTERVAL
);
754 INIT_LIST_HEAD(&my_vis_info
->recv_list
);
755 INIT_LIST_HEAD(&my_vis_info
->send_list
);
756 kref_init(&my_vis_info
->refcount
);
757 my_vis_info
->packet
.version
= COMPAT_VERSION
;
758 my_vis_info
->packet
.packet_type
= BAT_VIS
;
759 my_vis_info
->packet
.ttl
= TTL
;
760 my_vis_info
->packet
.seqno
= 0;
761 my_vis_info
->packet
.entries
= 0;
763 INIT_LIST_HEAD(&send_list
);
765 memcpy(my_vis_info
->packet
.vis_orig
, main_if_addr
, ETH_ALEN
);
766 memcpy(my_vis_info
->packet
.sender_orig
, main_if_addr
, ETH_ALEN
);
768 if (hash_add(vis_hash
, my_vis_info
) < 0) {
769 pr_err("Can't add own vis packet into hash\n");
770 /* not in hash, need to remove it manually. */
771 kref_put(&my_vis_info
->refcount
, free_info
);
775 spin_unlock_irqrestore(&vis_hash_lock
, flags
);
780 spin_unlock_irqrestore(&vis_hash_lock
, flags
);
785 /* Decrease the reference count on a hash item info */
786 static void free_info_ref(void *data
)
788 struct vis_info
*info
= data
;
791 kref_put(&info
->refcount
, free_info
);
794 /* shutdown vis-server */
801 cancel_delayed_work_sync(&vis_timer_wq
);
803 spin_lock_irqsave(&vis_hash_lock
, flags
);
804 /* properly remove, kill timers ... */
805 hash_delete(vis_hash
, free_info_ref
);
808 spin_unlock_irqrestore(&vis_hash_lock
, flags
);
811 /* schedule packets for (re)transmission */
812 static void start_vis_timer(void)
814 queue_delayed_work(bat_event_workqueue
, &vis_timer_wq
,
815 (VIS_INTERVAL
* HZ
) / 1000);