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9cfc7bd6 | 1 | /* Copyright (C) 2008-2012 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
3 | * Simon Wunderlich | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
21 | #include "send.h" | |
22 | #include "translation-table.h" | |
23 | #include "vis.h" | |
24 | #include "soft-interface.h" | |
25 | #include "hard-interface.h" | |
26 | #include "hash.h" | |
27 | #include "originator.h" | |
28 | ||
347c80f0 | 29 | #define BATADV_MAX_VIS_PACKET_SIZE 1000 |
c6c8fea2 | 30 | |
eaad8ad9 | 31 | static void batadv_start_vis_timer(struct bat_priv *bat_priv); |
c6c8fea2 SE |
32 | |
33 | /* free the info */ | |
eaad8ad9 | 34 | static void batadv_free_info(struct kref *ref) |
c6c8fea2 SE |
35 | { |
36 | struct vis_info *info = container_of(ref, struct vis_info, refcount); | |
37 | struct bat_priv *bat_priv = info->bat_priv; | |
38 | struct recvlist_node *entry, *tmp; | |
39 | ||
40 | list_del_init(&info->send_list); | |
41 | spin_lock_bh(&bat_priv->vis_list_lock); | |
42 | list_for_each_entry_safe(entry, tmp, &info->recv_list, list) { | |
43 | list_del(&entry->list); | |
44 | kfree(entry); | |
45 | } | |
46 | ||
47 | spin_unlock_bh(&bat_priv->vis_list_lock); | |
48 | kfree_skb(info->skb_packet); | |
dda9fc6b | 49 | kfree(info); |
c6c8fea2 SE |
50 | } |
51 | ||
52 | /* Compare two vis packets, used by the hashing algorithm */ | |
eaad8ad9 | 53 | static int batadv_vis_info_cmp(const struct hlist_node *node, const void *data2) |
c6c8fea2 | 54 | { |
747e4221 | 55 | const struct vis_info *d1, *d2; |
96412690 | 56 | const struct batadv_vis_packet *p1, *p2; |
7aadf889 ML |
57 | |
58 | d1 = container_of(node, struct vis_info, hash_entry); | |
c6c8fea2 | 59 | d2 = data2; |
96412690 SE |
60 | p1 = (struct batadv_vis_packet *)d1->skb_packet->data; |
61 | p2 = (struct batadv_vis_packet *)d2->skb_packet->data; | |
1eda58bf | 62 | return batadv_compare_eth(p1->vis_orig, p2->vis_orig); |
c6c8fea2 SE |
63 | } |
64 | ||
9cfc7bd6 SE |
65 | /* hash function to choose an entry in a hash table of given size |
66 | * hash algorithm from http://en.wikipedia.org/wiki/Hash_table | |
67 | */ | |
eaad8ad9 | 68 | static uint32_t batadv_vis_info_choose(const void *data, uint32_t size) |
c6c8fea2 | 69 | { |
747e4221 | 70 | const struct vis_info *vis_info = data; |
96412690 | 71 | const struct batadv_vis_packet *packet; |
747e4221 | 72 | const unsigned char *key; |
c6c8fea2 SE |
73 | uint32_t hash = 0; |
74 | size_t i; | |
75 | ||
96412690 | 76 | packet = (struct batadv_vis_packet *)vis_info->skb_packet->data; |
c6c8fea2 SE |
77 | key = packet->vis_orig; |
78 | for (i = 0; i < ETH_ALEN; i++) { | |
79 | hash += key[i]; | |
80 | hash += (hash << 10); | |
81 | hash ^= (hash >> 6); | |
82 | } | |
83 | ||
84 | hash += (hash << 3); | |
85 | hash ^= (hash >> 11); | |
86 | hash += (hash << 15); | |
87 | ||
88 | return hash % size; | |
89 | } | |
90 | ||
eaad8ad9 SE |
91 | static struct vis_info *batadv_vis_hash_find(struct bat_priv *bat_priv, |
92 | const void *data) | |
7aadf889 | 93 | { |
5bf74e9c | 94 | struct batadv_hashtable *hash = bat_priv->vis_hash; |
7aadf889 ML |
95 | struct hlist_head *head; |
96 | struct hlist_node *node; | |
97 | struct vis_info *vis_info, *vis_info_tmp = NULL; | |
c90681b8 | 98 | uint32_t index; |
7aadf889 ML |
99 | |
100 | if (!hash) | |
101 | return NULL; | |
102 | ||
eaad8ad9 | 103 | index = batadv_vis_info_choose(data, hash->size); |
7aadf889 ML |
104 | head = &hash->table[index]; |
105 | ||
106 | rcu_read_lock(); | |
107 | hlist_for_each_entry_rcu(vis_info, node, head, hash_entry) { | |
eaad8ad9 | 108 | if (!batadv_vis_info_cmp(node, data)) |
7aadf889 ML |
109 | continue; |
110 | ||
111 | vis_info_tmp = vis_info; | |
112 | break; | |
113 | } | |
114 | rcu_read_unlock(); | |
115 | ||
116 | return vis_info_tmp; | |
117 | } | |
118 | ||
c6c8fea2 | 119 | /* insert interface to the list of interfaces of one originator, if it |
9cfc7bd6 SE |
120 | * does not already exist in the list |
121 | */ | |
eaad8ad9 SE |
122 | static void batadv_vis_data_insert_interface(const uint8_t *interface, |
123 | struct hlist_head *if_list, | |
124 | bool primary) | |
c6c8fea2 SE |
125 | { |
126 | struct if_list_entry *entry; | |
127 | struct hlist_node *pos; | |
128 | ||
129 | hlist_for_each_entry(entry, pos, if_list, list) { | |
1eda58bf | 130 | if (batadv_compare_eth(entry->addr, interface)) |
c6c8fea2 SE |
131 | return; |
132 | } | |
133 | ||
015758d0 | 134 | /* it's a new address, add it to the list */ |
c6c8fea2 SE |
135 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); |
136 | if (!entry) | |
137 | return; | |
138 | memcpy(entry->addr, interface, ETH_ALEN); | |
139 | entry->primary = primary; | |
140 | hlist_add_head(&entry->list, if_list); | |
141 | } | |
142 | ||
28afd3c0 SE |
143 | static void batadv_vis_data_read_prim_sec(struct seq_file *seq, |
144 | const struct hlist_head *if_list) | |
c6c8fea2 SE |
145 | { |
146 | struct if_list_entry *entry; | |
147 | struct hlist_node *pos; | |
c6c8fea2 SE |
148 | |
149 | hlist_for_each_entry(entry, pos, if_list, list) { | |
150 | if (entry->primary) | |
28afd3c0 | 151 | seq_printf(seq, "PRIMARY, "); |
c6c8fea2 | 152 | else |
28afd3c0 | 153 | seq_printf(seq, "SEC %pM, ", entry->addr); |
c6c8fea2 | 154 | } |
28afd3c0 SE |
155 | } |
156 | ||
157 | /* read an entry */ | |
158 | static ssize_t batadv_vis_data_read_entry(struct seq_file *seq, | |
159 | const struct vis_info_entry *entry, | |
160 | const uint8_t *src, bool primary) | |
161 | { | |
162 | if (primary && entry->quality == 0) | |
163 | return seq_printf(seq, "TT %pM, ", entry->dest); | |
164 | else if (batadv_compare_eth(entry->src, src)) | |
165 | return seq_printf(seq, "TQ %pM %d, ", entry->dest, | |
166 | entry->quality); | |
c6c8fea2 | 167 | |
28afd3c0 | 168 | return 0; |
c6c8fea2 SE |
169 | } |
170 | ||
28afd3c0 | 171 | static void batadv_vis_data_insert_interfaces(struct hlist_head *list, |
96412690 | 172 | struct batadv_vis_packet *packet, |
28afd3c0 | 173 | struct vis_info_entry *entries) |
c6c8fea2 | 174 | { |
28afd3c0 SE |
175 | int i; |
176 | ||
177 | for (i = 0; i < packet->entries; i++) { | |
178 | if (entries[i].quality == 0) | |
179 | continue; | |
180 | ||
181 | if (batadv_compare_eth(entries[i].src, packet->vis_orig)) | |
182 | continue; | |
183 | ||
184 | batadv_vis_data_insert_interface(entries[i].src, list, false); | |
185 | } | |
186 | } | |
187 | ||
188 | static void batadv_vis_data_read_entries(struct seq_file *seq, | |
189 | struct hlist_head *list, | |
96412690 | 190 | struct batadv_vis_packet *packet, |
28afd3c0 SE |
191 | struct vis_info_entry *entries) |
192 | { | |
193 | int i; | |
c6c8fea2 SE |
194 | struct if_list_entry *entry; |
195 | struct hlist_node *pos; | |
c6c8fea2 | 196 | |
28afd3c0 SE |
197 | hlist_for_each_entry(entry, pos, list, list) { |
198 | seq_printf(seq, "%pM,", entry->addr); | |
199 | ||
200 | for (i = 0; i < packet->entries; i++) | |
201 | batadv_vis_data_read_entry(seq, &entries[i], | |
202 | entry->addr, entry->primary); | |
203 | ||
204 | /* add primary/secondary records */ | |
205 | if (batadv_compare_eth(entry->addr, packet->vis_orig)) | |
206 | batadv_vis_data_read_prim_sec(seq, list); | |
c6c8fea2 | 207 | |
28afd3c0 SE |
208 | seq_printf(seq, "\n"); |
209 | } | |
c6c8fea2 SE |
210 | } |
211 | ||
28afd3c0 SE |
212 | static void batadv_vis_seq_print_text_bucket(struct seq_file *seq, |
213 | const struct hlist_head *head) | |
c6c8fea2 | 214 | { |
28afd3c0 SE |
215 | struct hlist_node *node; |
216 | struct vis_info *info; | |
96412690 | 217 | struct batadv_vis_packet *packet; |
28afd3c0 SE |
218 | uint8_t *entries_pos; |
219 | struct vis_info_entry *entries; | |
220 | struct if_list_entry *entry; | |
221 | struct hlist_node *pos, *n; | |
c6c8fea2 | 222 | |
28afd3c0 SE |
223 | HLIST_HEAD(vis_if_list); |
224 | ||
225 | hlist_for_each_entry_rcu(info, node, head, hash_entry) { | |
96412690 | 226 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
28afd3c0 SE |
227 | entries_pos = (uint8_t *)packet + sizeof(*packet); |
228 | entries = (struct vis_info_entry *)entries_pos; | |
229 | ||
230 | batadv_vis_data_insert_interface(packet->vis_orig, &vis_if_list, | |
231 | true); | |
232 | batadv_vis_data_insert_interfaces(&vis_if_list, packet, | |
233 | entries); | |
234 | batadv_vis_data_read_entries(seq, &vis_if_list, packet, | |
235 | entries); | |
236 | ||
237 | hlist_for_each_entry_safe(entry, pos, n, &vis_if_list, list) { | |
238 | hlist_del(&entry->list); | |
239 | kfree(entry); | |
240 | } | |
241 | } | |
c6c8fea2 SE |
242 | } |
243 | ||
d0f714f4 | 244 | int batadv_vis_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 | 245 | { |
32ae9b22 | 246 | struct hard_iface *primary_if; |
c6c8fea2 | 247 | struct hlist_head *head; |
c6c8fea2 SE |
248 | struct net_device *net_dev = (struct net_device *)seq->private; |
249 | struct bat_priv *bat_priv = netdev_priv(net_dev); | |
5bf74e9c | 250 | struct batadv_hashtable *hash = bat_priv->vis_hash; |
c90681b8 | 251 | uint32_t i; |
28afd3c0 | 252 | int ret = 0; |
c6c8fea2 | 253 | int vis_server = atomic_read(&bat_priv->vis_mode); |
c6c8fea2 | 254 | |
e5d89254 | 255 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
256 | if (!primary_if) |
257 | goto out; | |
258 | ||
acd34afa | 259 | if (vis_server == BATADV_VIS_TYPE_CLIENT_UPDATE) |
32ae9b22 | 260 | goto out; |
c6c8fea2 | 261 | |
c6c8fea2 SE |
262 | spin_lock_bh(&bat_priv->vis_hash_lock); |
263 | for (i = 0; i < hash->size; i++) { | |
264 | head = &hash->table[i]; | |
28afd3c0 | 265 | batadv_vis_seq_print_text_bucket(seq, head); |
c6c8fea2 | 266 | } |
c6c8fea2 SE |
267 | spin_unlock_bh(&bat_priv->vis_hash_lock); |
268 | ||
32ae9b22 ML |
269 | out: |
270 | if (primary_if) | |
e5d89254 | 271 | batadv_hardif_free_ref(primary_if); |
32ae9b22 | 272 | return ret; |
c6c8fea2 SE |
273 | } |
274 | ||
275 | /* add the info packet to the send list, if it was not | |
9cfc7bd6 SE |
276 | * already linked in. |
277 | */ | |
eaad8ad9 SE |
278 | static void batadv_send_list_add(struct bat_priv *bat_priv, |
279 | struct vis_info *info) | |
c6c8fea2 SE |
280 | { |
281 | if (list_empty(&info->send_list)) { | |
282 | kref_get(&info->refcount); | |
283 | list_add_tail(&info->send_list, &bat_priv->vis_send_list); | |
284 | } | |
285 | } | |
286 | ||
287 | /* delete the info packet from the send list, if it was | |
9cfc7bd6 SE |
288 | * linked in. |
289 | */ | |
eaad8ad9 | 290 | static void batadv_send_list_del(struct vis_info *info) |
c6c8fea2 SE |
291 | { |
292 | if (!list_empty(&info->send_list)) { | |
293 | list_del_init(&info->send_list); | |
eaad8ad9 | 294 | kref_put(&info->refcount, batadv_free_info); |
c6c8fea2 SE |
295 | } |
296 | } | |
297 | ||
298 | /* tries to add one entry to the receive list. */ | |
eaad8ad9 SE |
299 | static void batadv_recv_list_add(struct bat_priv *bat_priv, |
300 | struct list_head *recv_list, const char *mac) | |
c6c8fea2 SE |
301 | { |
302 | struct recvlist_node *entry; | |
303 | ||
704509b8 | 304 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); |
c6c8fea2 SE |
305 | if (!entry) |
306 | return; | |
307 | ||
308 | memcpy(entry->mac, mac, ETH_ALEN); | |
309 | spin_lock_bh(&bat_priv->vis_list_lock); | |
310 | list_add_tail(&entry->list, recv_list); | |
311 | spin_unlock_bh(&bat_priv->vis_list_lock); | |
312 | } | |
313 | ||
314 | /* returns 1 if this mac is in the recv_list */ | |
eaad8ad9 SE |
315 | static int batadv_recv_list_is_in(struct bat_priv *bat_priv, |
316 | const struct list_head *recv_list, | |
317 | const char *mac) | |
c6c8fea2 | 318 | { |
747e4221 | 319 | const struct recvlist_node *entry; |
c6c8fea2 SE |
320 | |
321 | spin_lock_bh(&bat_priv->vis_list_lock); | |
322 | list_for_each_entry(entry, recv_list, list) { | |
1eda58bf | 323 | if (batadv_compare_eth(entry->mac, mac)) { |
c6c8fea2 SE |
324 | spin_unlock_bh(&bat_priv->vis_list_lock); |
325 | return 1; | |
326 | } | |
327 | } | |
328 | spin_unlock_bh(&bat_priv->vis_list_lock); | |
329 | return 0; | |
330 | } | |
331 | ||
332 | /* try to add the packet to the vis_hash. return NULL if invalid (e.g. too old, | |
333 | * broken.. ). vis hash must be locked outside. is_new is set when the packet | |
9cfc7bd6 SE |
334 | * is newer than old entries in the hash. |
335 | */ | |
eaad8ad9 | 336 | static struct vis_info *batadv_add_packet(struct bat_priv *bat_priv, |
96412690 | 337 | struct batadv_vis_packet *vis_packet, |
eaad8ad9 SE |
338 | int vis_info_len, int *is_new, |
339 | int make_broadcast) | |
c6c8fea2 SE |
340 | { |
341 | struct vis_info *info, *old_info; | |
96412690 | 342 | struct batadv_vis_packet *search_packet, *old_packet; |
c6c8fea2 | 343 | struct vis_info search_elem; |
96412690 SE |
344 | struct batadv_vis_packet *packet; |
345 | struct sk_buff *tmp_skb; | |
c6c8fea2 | 346 | int hash_added; |
96412690 | 347 | size_t len; |
c6c8fea2 SE |
348 | |
349 | *is_new = 0; | |
350 | /* sanity check */ | |
351 | if (!bat_priv->vis_hash) | |
352 | return NULL; | |
353 | ||
354 | /* see if the packet is already in vis_hash */ | |
704509b8 | 355 | search_elem.skb_packet = dev_alloc_skb(sizeof(*search_packet)); |
c6c8fea2 SE |
356 | if (!search_elem.skb_packet) |
357 | return NULL; | |
96412690 SE |
358 | len = sizeof(*search_packet); |
359 | tmp_skb = search_elem.skb_packet; | |
360 | search_packet = (struct batadv_vis_packet *)skb_put(tmp_skb, len); | |
c6c8fea2 SE |
361 | |
362 | memcpy(search_packet->vis_orig, vis_packet->vis_orig, ETH_ALEN); | |
eaad8ad9 | 363 | old_info = batadv_vis_hash_find(bat_priv, &search_elem); |
c6c8fea2 SE |
364 | kfree_skb(search_elem.skb_packet); |
365 | ||
366 | if (old_info) { | |
96412690 SE |
367 | tmp_skb = old_info->skb_packet; |
368 | old_packet = (struct batadv_vis_packet *)tmp_skb->data; | |
3e34819e SE |
369 | if (!batadv_seq_after(ntohl(vis_packet->seqno), |
370 | ntohl(old_packet->seqno))) { | |
c6c8fea2 | 371 | if (old_packet->seqno == vis_packet->seqno) { |
eaad8ad9 SE |
372 | batadv_recv_list_add(bat_priv, |
373 | &old_info->recv_list, | |
374 | vis_packet->sender_orig); | |
c6c8fea2 SE |
375 | return old_info; |
376 | } else { | |
377 | /* newer packet is already in hash. */ | |
378 | return NULL; | |
379 | } | |
380 | } | |
381 | /* remove old entry */ | |
eaad8ad9 SE |
382 | batadv_hash_remove(bat_priv->vis_hash, batadv_vis_info_cmp, |
383 | batadv_vis_info_choose, old_info); | |
384 | batadv_send_list_del(old_info); | |
385 | kref_put(&old_info->refcount, batadv_free_info); | |
c6c8fea2 SE |
386 | } |
387 | ||
704509b8 | 388 | info = kmalloc(sizeof(*info), GFP_ATOMIC); |
c6c8fea2 SE |
389 | if (!info) |
390 | return NULL; | |
391 | ||
96412690 SE |
392 | len = sizeof(*packet) + vis_info_len; |
393 | info->skb_packet = dev_alloc_skb(len + ETH_HLEN); | |
c6c8fea2 SE |
394 | if (!info->skb_packet) { |
395 | kfree(info); | |
396 | return NULL; | |
397 | } | |
0d125074 | 398 | skb_reserve(info->skb_packet, ETH_HLEN); |
96412690 | 399 | packet = (struct batadv_vis_packet *)skb_put(info->skb_packet, len); |
c6c8fea2 SE |
400 | |
401 | kref_init(&info->refcount); | |
402 | INIT_LIST_HEAD(&info->send_list); | |
403 | INIT_LIST_HEAD(&info->recv_list); | |
404 | info->first_seen = jiffies; | |
405 | info->bat_priv = bat_priv; | |
96412690 | 406 | memcpy(packet, vis_packet, len); |
c6c8fea2 SE |
407 | |
408 | /* initialize and add new packet. */ | |
409 | *is_new = 1; | |
410 | ||
411 | /* Make it a broadcast packet, if required */ | |
412 | if (make_broadcast) | |
3193e8fd | 413 | memcpy(packet->target_orig, batadv_broadcast_addr, ETH_ALEN); |
c6c8fea2 SE |
414 | |
415 | /* repair if entries is longer than packet. */ | |
416 | if (packet->entries * sizeof(struct vis_info_entry) > vis_info_len) | |
417 | packet->entries = vis_info_len / sizeof(struct vis_info_entry); | |
418 | ||
eaad8ad9 | 419 | batadv_recv_list_add(bat_priv, &info->recv_list, packet->sender_orig); |
c6c8fea2 SE |
420 | |
421 | /* try to add it */ | |
eaad8ad9 SE |
422 | hash_added = batadv_hash_add(bat_priv->vis_hash, batadv_vis_info_cmp, |
423 | batadv_vis_info_choose, info, | |
424 | &info->hash_entry); | |
1a1f37d9 | 425 | if (hash_added != 0) { |
c6c8fea2 | 426 | /* did not work (for some reason) */ |
eaad8ad9 | 427 | kref_put(&info->refcount, batadv_free_info); |
c6c8fea2 SE |
428 | info = NULL; |
429 | } | |
430 | ||
431 | return info; | |
432 | } | |
433 | ||
434 | /* handle the server sync packet, forward if needed. */ | |
d0f714f4 | 435 | void batadv_receive_server_sync_packet(struct bat_priv *bat_priv, |
96412690 | 436 | struct batadv_vis_packet *vis_packet, |
d0f714f4 | 437 | int vis_info_len) |
c6c8fea2 SE |
438 | { |
439 | struct vis_info *info; | |
440 | int is_new, make_broadcast; | |
441 | int vis_server = atomic_read(&bat_priv->vis_mode); | |
442 | ||
acd34afa | 443 | make_broadcast = (vis_server == BATADV_VIS_TYPE_SERVER_SYNC); |
c6c8fea2 SE |
444 | |
445 | spin_lock_bh(&bat_priv->vis_hash_lock); | |
eaad8ad9 SE |
446 | info = batadv_add_packet(bat_priv, vis_packet, vis_info_len, |
447 | &is_new, make_broadcast); | |
c6c8fea2 SE |
448 | if (!info) |
449 | goto end; | |
450 | ||
451 | /* only if we are server ourselves and packet is newer than the one in | |
9cfc7bd6 SE |
452 | * hash. |
453 | */ | |
acd34afa | 454 | if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC && is_new) |
eaad8ad9 | 455 | batadv_send_list_add(bat_priv, info); |
c6c8fea2 SE |
456 | end: |
457 | spin_unlock_bh(&bat_priv->vis_hash_lock); | |
458 | } | |
459 | ||
460 | /* handle an incoming client update packet and schedule forward if needed. */ | |
d0f714f4 | 461 | void batadv_receive_client_update_packet(struct bat_priv *bat_priv, |
96412690 | 462 | struct batadv_vis_packet *vis_packet, |
d0f714f4 | 463 | int vis_info_len) |
c6c8fea2 SE |
464 | { |
465 | struct vis_info *info; | |
96412690 | 466 | struct batadv_vis_packet *packet; |
c6c8fea2 SE |
467 | int is_new; |
468 | int vis_server = atomic_read(&bat_priv->vis_mode); | |
469 | int are_target = 0; | |
470 | ||
471 | /* clients shall not broadcast. */ | |
472 | if (is_broadcast_ether_addr(vis_packet->target_orig)) | |
473 | return; | |
474 | ||
475 | /* Are we the target for this VIS packet? */ | |
acd34afa | 476 | if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC && |
3193e8fd | 477 | batadv_is_my_mac(vis_packet->target_orig)) |
c6c8fea2 SE |
478 | are_target = 1; |
479 | ||
480 | spin_lock_bh(&bat_priv->vis_hash_lock); | |
eaad8ad9 SE |
481 | info = batadv_add_packet(bat_priv, vis_packet, vis_info_len, |
482 | &is_new, are_target); | |
c6c8fea2 SE |
483 | |
484 | if (!info) | |
485 | goto end; | |
486 | /* note that outdated packets will be dropped at this point. */ | |
487 | ||
96412690 | 488 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
489 | |
490 | /* send only if we're the target server or ... */ | |
491 | if (are_target && is_new) { | |
acd34afa | 492 | packet->vis_type = BATADV_VIS_TYPE_SERVER_SYNC; /* upgrade! */ |
eaad8ad9 | 493 | batadv_send_list_add(bat_priv, info); |
c6c8fea2 SE |
494 | |
495 | /* ... we're not the recipient (and thus need to forward). */ | |
3193e8fd | 496 | } else if (!batadv_is_my_mac(packet->target_orig)) { |
eaad8ad9 | 497 | batadv_send_list_add(bat_priv, info); |
c6c8fea2 SE |
498 | } |
499 | ||
500 | end: | |
501 | spin_unlock_bh(&bat_priv->vis_hash_lock); | |
502 | } | |
503 | ||
504 | /* Walk the originators and find the VIS server with the best tq. Set the packet | |
505 | * address to its address and return the best_tq. | |
506 | * | |
9cfc7bd6 SE |
507 | * Must be called with the originator hash locked |
508 | */ | |
eaad8ad9 SE |
509 | static int batadv_find_best_vis_server(struct bat_priv *bat_priv, |
510 | struct vis_info *info) | |
c6c8fea2 | 511 | { |
5bf74e9c | 512 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
e1a5382f | 513 | struct neigh_node *router; |
7aadf889 | 514 | struct hlist_node *node; |
c6c8fea2 | 515 | struct hlist_head *head; |
c6c8fea2 | 516 | struct orig_node *orig_node; |
96412690 | 517 | struct batadv_vis_packet *packet; |
c90681b8 AQ |
518 | int best_tq = -1; |
519 | uint32_t i; | |
c6c8fea2 | 520 | |
96412690 | 521 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
522 | |
523 | for (i = 0; i < hash->size; i++) { | |
524 | head = &hash->table[i]; | |
525 | ||
fb778ea1 | 526 | rcu_read_lock(); |
7aadf889 | 527 | hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) { |
7d211efc | 528 | router = batadv_orig_node_get_router(orig_node); |
e1a5382f LL |
529 | if (!router) |
530 | continue; | |
531 | ||
acd34afa | 532 | if ((orig_node->flags & BATADV_VIS_SERVER) && |
e1a5382f LL |
533 | (router->tq_avg > best_tq)) { |
534 | best_tq = router->tq_avg; | |
c6c8fea2 SE |
535 | memcpy(packet->target_orig, orig_node->orig, |
536 | ETH_ALEN); | |
537 | } | |
7d211efc | 538 | batadv_neigh_node_free_ref(router); |
c6c8fea2 | 539 | } |
fb778ea1 | 540 | rcu_read_unlock(); |
c6c8fea2 SE |
541 | } |
542 | ||
543 | return best_tq; | |
544 | } | |
545 | ||
546 | /* Return true if the vis packet is full. */ | |
eaad8ad9 | 547 | static bool batadv_vis_packet_full(const struct vis_info *info) |
c6c8fea2 | 548 | { |
96412690 | 549 | const struct batadv_vis_packet *packet; |
347c80f0 SE |
550 | size_t num_items; |
551 | ||
96412690 | 552 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
347c80f0 | 553 | num_items = BATADV_MAX_VIS_PACKET_SIZE / sizeof(struct vis_info_entry); |
c6c8fea2 | 554 | |
347c80f0 | 555 | if (num_items < packet->entries + 1) |
c6c8fea2 SE |
556 | return true; |
557 | return false; | |
558 | } | |
559 | ||
560 | /* generates a packet of own vis data, | |
9cfc7bd6 SE |
561 | * returns 0 on success, -1 if no packet could be generated |
562 | */ | |
eaad8ad9 | 563 | static int batadv_generate_vis_packet(struct bat_priv *bat_priv) |
c6c8fea2 | 564 | { |
5bf74e9c | 565 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
7aadf889 | 566 | struct hlist_node *node; |
c6c8fea2 | 567 | struct hlist_head *head; |
c6c8fea2 | 568 | struct orig_node *orig_node; |
e1a5382f | 569 | struct neigh_node *router; |
958ca598 | 570 | struct vis_info *info = bat_priv->my_vis_info; |
96412690 | 571 | struct batadv_vis_packet *packet; |
c6c8fea2 | 572 | struct vis_info_entry *entry; |
48100bac | 573 | struct tt_common_entry *tt_common_entry; |
c90681b8 AQ |
574 | int best_tq = -1; |
575 | uint32_t i; | |
c6c8fea2 SE |
576 | |
577 | info->first_seen = jiffies; | |
96412690 | 578 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
579 | packet->vis_type = atomic_read(&bat_priv->vis_mode); |
580 | ||
3193e8fd | 581 | memcpy(packet->target_orig, batadv_broadcast_addr, ETH_ALEN); |
42d0b044 | 582 | packet->header.ttl = BATADV_TTL; |
c6c8fea2 SE |
583 | packet->seqno = htonl(ntohl(packet->seqno) + 1); |
584 | packet->entries = 0; | |
704509b8 | 585 | skb_trim(info->skb_packet, sizeof(*packet)); |
c6c8fea2 | 586 | |
acd34afa | 587 | if (packet->vis_type == BATADV_VIS_TYPE_CLIENT_UPDATE) { |
eaad8ad9 | 588 | best_tq = batadv_find_best_vis_server(bat_priv, info); |
c6c8fea2 | 589 | |
d0072609 | 590 | if (best_tq < 0) |
5346c35e | 591 | return best_tq; |
c6c8fea2 SE |
592 | } |
593 | ||
594 | for (i = 0; i < hash->size; i++) { | |
595 | head = &hash->table[i]; | |
596 | ||
fb778ea1 | 597 | rcu_read_lock(); |
7aadf889 | 598 | hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) { |
7d211efc | 599 | router = batadv_orig_node_get_router(orig_node); |
e1a5382f | 600 | if (!router) |
c6c8fea2 SE |
601 | continue; |
602 | ||
1eda58bf | 603 | if (!batadv_compare_eth(router->addr, orig_node->orig)) |
e1a5382f | 604 | goto next; |
c6c8fea2 | 605 | |
e9a4f295 | 606 | if (router->if_incoming->if_status != BATADV_IF_ACTIVE) |
e1a5382f | 607 | goto next; |
c6c8fea2 | 608 | |
e1a5382f LL |
609 | if (router->tq_avg < 1) |
610 | goto next; | |
c6c8fea2 SE |
611 | |
612 | /* fill one entry into buffer. */ | |
613 | entry = (struct vis_info_entry *) | |
614 | skb_put(info->skb_packet, sizeof(*entry)); | |
615 | memcpy(entry->src, | |
e1a5382f | 616 | router->if_incoming->net_dev->dev_addr, |
c6c8fea2 SE |
617 | ETH_ALEN); |
618 | memcpy(entry->dest, orig_node->orig, ETH_ALEN); | |
e1a5382f | 619 | entry->quality = router->tq_avg; |
c6c8fea2 SE |
620 | packet->entries++; |
621 | ||
e1a5382f | 622 | next: |
7d211efc | 623 | batadv_neigh_node_free_ref(router); |
e1a5382f | 624 | |
eaad8ad9 | 625 | if (batadv_vis_packet_full(info)) |
d0072609 | 626 | goto unlock; |
c6c8fea2 | 627 | } |
fb778ea1 | 628 | rcu_read_unlock(); |
c6c8fea2 SE |
629 | } |
630 | ||
2dafb49d | 631 | hash = bat_priv->tt_local_hash; |
c6c8fea2 | 632 | |
c6c8fea2 SE |
633 | for (i = 0; i < hash->size; i++) { |
634 | head = &hash->table[i]; | |
635 | ||
7683fdc1 | 636 | rcu_read_lock(); |
48100bac | 637 | hlist_for_each_entry_rcu(tt_common_entry, node, head, |
7683fdc1 | 638 | hash_entry) { |
c6c8fea2 SE |
639 | entry = (struct vis_info_entry *) |
640 | skb_put(info->skb_packet, | |
641 | sizeof(*entry)); | |
642 | memset(entry->src, 0, ETH_ALEN); | |
48100bac | 643 | memcpy(entry->dest, tt_common_entry->addr, ETH_ALEN); |
2dafb49d | 644 | entry->quality = 0; /* 0 means TT */ |
c6c8fea2 SE |
645 | packet->entries++; |
646 | ||
eaad8ad9 | 647 | if (batadv_vis_packet_full(info)) |
7683fdc1 | 648 | goto unlock; |
c6c8fea2 | 649 | } |
7683fdc1 | 650 | rcu_read_unlock(); |
c6c8fea2 SE |
651 | } |
652 | ||
c6c8fea2 | 653 | return 0; |
d0072609 ML |
654 | |
655 | unlock: | |
656 | rcu_read_unlock(); | |
657 | return 0; | |
c6c8fea2 SE |
658 | } |
659 | ||
660 | /* free old vis packets. Must be called with this vis_hash_lock | |
9cfc7bd6 SE |
661 | * held |
662 | */ | |
eaad8ad9 | 663 | static void batadv_purge_vis_packets(struct bat_priv *bat_priv) |
c6c8fea2 | 664 | { |
c90681b8 | 665 | uint32_t i; |
5bf74e9c | 666 | struct batadv_hashtable *hash = bat_priv->vis_hash; |
7aadf889 | 667 | struct hlist_node *node, *node_tmp; |
c6c8fea2 | 668 | struct hlist_head *head; |
c6c8fea2 SE |
669 | struct vis_info *info; |
670 | ||
671 | for (i = 0; i < hash->size; i++) { | |
672 | head = &hash->table[i]; | |
673 | ||
7aadf889 ML |
674 | hlist_for_each_entry_safe(info, node, node_tmp, |
675 | head, hash_entry) { | |
c6c8fea2 SE |
676 | /* never purge own data. */ |
677 | if (info == bat_priv->my_vis_info) | |
678 | continue; | |
679 | ||
1eda58bf | 680 | if (batadv_has_timed_out(info->first_seen, |
edbf7ff7 | 681 | BATADV_VIS_TIMEOUT)) { |
7aadf889 | 682 | hlist_del(node); |
eaad8ad9 SE |
683 | batadv_send_list_del(info); |
684 | kref_put(&info->refcount, batadv_free_info); | |
c6c8fea2 SE |
685 | } |
686 | } | |
687 | } | |
688 | } | |
689 | ||
eaad8ad9 SE |
690 | static void batadv_broadcast_vis_packet(struct bat_priv *bat_priv, |
691 | struct vis_info *info) | |
c6c8fea2 | 692 | { |
e1a5382f | 693 | struct neigh_node *router; |
5bf74e9c | 694 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
7aadf889 | 695 | struct hlist_node *node; |
c6c8fea2 | 696 | struct hlist_head *head; |
c6c8fea2 | 697 | struct orig_node *orig_node; |
96412690 | 698 | struct batadv_vis_packet *packet; |
c6c8fea2 | 699 | struct sk_buff *skb; |
e6c10f43 | 700 | struct hard_iface *hard_iface; |
c6c8fea2 | 701 | uint8_t dstaddr[ETH_ALEN]; |
c90681b8 | 702 | uint32_t i; |
c6c8fea2 SE |
703 | |
704 | ||
96412690 | 705 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
706 | |
707 | /* send to all routers in range. */ | |
708 | for (i = 0; i < hash->size; i++) { | |
709 | head = &hash->table[i]; | |
710 | ||
fb778ea1 | 711 | rcu_read_lock(); |
7aadf889 | 712 | hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) { |
c6c8fea2 | 713 | /* if it's a vis server and reachable, send it. */ |
acd34afa | 714 | if (!(orig_node->flags & BATADV_VIS_SERVER)) |
c6c8fea2 | 715 | continue; |
e1a5382f | 716 | |
7d211efc | 717 | router = batadv_orig_node_get_router(orig_node); |
e1a5382f LL |
718 | if (!router) |
719 | continue; | |
720 | ||
c6c8fea2 | 721 | /* don't send it if we already received the packet from |
9cfc7bd6 SE |
722 | * this node. |
723 | */ | |
eaad8ad9 SE |
724 | if (batadv_recv_list_is_in(bat_priv, &info->recv_list, |
725 | orig_node->orig)) { | |
7d211efc | 726 | batadv_neigh_node_free_ref(router); |
c6c8fea2 | 727 | continue; |
e1a5382f | 728 | } |
c6c8fea2 SE |
729 | |
730 | memcpy(packet->target_orig, orig_node->orig, ETH_ALEN); | |
e1a5382f LL |
731 | hard_iface = router->if_incoming; |
732 | memcpy(dstaddr, router->addr, ETH_ALEN); | |
733 | ||
7d211efc | 734 | batadv_neigh_node_free_ref(router); |
c6c8fea2 SE |
735 | |
736 | skb = skb_clone(info->skb_packet, GFP_ATOMIC); | |
737 | if (skb) | |
9455e34c SE |
738 | batadv_send_skb_packet(skb, hard_iface, |
739 | dstaddr); | |
c6c8fea2 | 740 | |
c6c8fea2 | 741 | } |
fb778ea1 | 742 | rcu_read_unlock(); |
c6c8fea2 | 743 | } |
c6c8fea2 SE |
744 | } |
745 | ||
eaad8ad9 SE |
746 | static void batadv_unicast_vis_packet(struct bat_priv *bat_priv, |
747 | struct vis_info *info) | |
c6c8fea2 SE |
748 | { |
749 | struct orig_node *orig_node; | |
e1a5382f | 750 | struct neigh_node *router = NULL; |
c6c8fea2 | 751 | struct sk_buff *skb; |
96412690 | 752 | struct batadv_vis_packet *packet; |
c6c8fea2 | 753 | |
96412690 | 754 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 | 755 | |
da641193 | 756 | orig_node = batadv_orig_hash_find(bat_priv, packet->target_orig); |
44524fcd | 757 | if (!orig_node) |
e1a5382f | 758 | goto out; |
44524fcd | 759 | |
7d211efc | 760 | router = batadv_orig_node_get_router(orig_node); |
e1a5382f LL |
761 | if (!router) |
762 | goto out; | |
c6c8fea2 SE |
763 | |
764 | skb = skb_clone(info->skb_packet, GFP_ATOMIC); | |
765 | if (skb) | |
9455e34c | 766 | batadv_send_skb_packet(skb, router->if_incoming, router->addr); |
c6c8fea2 SE |
767 | |
768 | out: | |
e1a5382f | 769 | if (router) |
7d211efc | 770 | batadv_neigh_node_free_ref(router); |
44524fcd | 771 | if (orig_node) |
7d211efc | 772 | batadv_orig_node_free_ref(orig_node); |
c6c8fea2 SE |
773 | } |
774 | ||
eaad8ad9 SE |
775 | /* only send one vis packet. called from batadv_send_vis_packets() */ |
776 | static void batadv_send_vis_packet(struct bat_priv *bat_priv, | |
777 | struct vis_info *info) | |
c6c8fea2 | 778 | { |
32ae9b22 | 779 | struct hard_iface *primary_if; |
96412690 | 780 | struct batadv_vis_packet *packet; |
c6c8fea2 | 781 | |
e5d89254 | 782 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
783 | if (!primary_if) |
784 | goto out; | |
785 | ||
96412690 | 786 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
76543d14 | 787 | if (packet->header.ttl < 2) { |
c6c8fea2 | 788 | pr_debug("Error - can't send vis packet: ttl exceeded\n"); |
32ae9b22 | 789 | goto out; |
c6c8fea2 SE |
790 | } |
791 | ||
32ae9b22 | 792 | memcpy(packet->sender_orig, primary_if->net_dev->dev_addr, ETH_ALEN); |
76543d14 | 793 | packet->header.ttl--; |
c6c8fea2 SE |
794 | |
795 | if (is_broadcast_ether_addr(packet->target_orig)) | |
eaad8ad9 | 796 | batadv_broadcast_vis_packet(bat_priv, info); |
c6c8fea2 | 797 | else |
eaad8ad9 | 798 | batadv_unicast_vis_packet(bat_priv, info); |
76543d14 | 799 | packet->header.ttl++; /* restore TTL */ |
32ae9b22 ML |
800 | |
801 | out: | |
802 | if (primary_if) | |
e5d89254 | 803 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
804 | } |
805 | ||
806 | /* called from timer; send (and maybe generate) vis packet. */ | |
eaad8ad9 | 807 | static void batadv_send_vis_packets(struct work_struct *work) |
c6c8fea2 SE |
808 | { |
809 | struct delayed_work *delayed_work = | |
810 | container_of(work, struct delayed_work, work); | |
811 | struct bat_priv *bat_priv = | |
812 | container_of(delayed_work, struct bat_priv, vis_work); | |
1181e1da | 813 | struct vis_info *info; |
c6c8fea2 SE |
814 | |
815 | spin_lock_bh(&bat_priv->vis_hash_lock); | |
eaad8ad9 | 816 | batadv_purge_vis_packets(bat_priv); |
c6c8fea2 | 817 | |
eaad8ad9 | 818 | if (batadv_generate_vis_packet(bat_priv) == 0) { |
c6c8fea2 | 819 | /* schedule if generation was successful */ |
eaad8ad9 | 820 | batadv_send_list_add(bat_priv, bat_priv->my_vis_info); |
c6c8fea2 SE |
821 | } |
822 | ||
1181e1da SE |
823 | while (!list_empty(&bat_priv->vis_send_list)) { |
824 | info = list_first_entry(&bat_priv->vis_send_list, | |
825 | typeof(*info), send_list); | |
c6c8fea2 SE |
826 | |
827 | kref_get(&info->refcount); | |
828 | spin_unlock_bh(&bat_priv->vis_hash_lock); | |
829 | ||
eaad8ad9 | 830 | batadv_send_vis_packet(bat_priv, info); |
c6c8fea2 SE |
831 | |
832 | spin_lock_bh(&bat_priv->vis_hash_lock); | |
eaad8ad9 SE |
833 | batadv_send_list_del(info); |
834 | kref_put(&info->refcount, batadv_free_info); | |
c6c8fea2 SE |
835 | } |
836 | spin_unlock_bh(&bat_priv->vis_hash_lock); | |
eaad8ad9 | 837 | batadv_start_vis_timer(bat_priv); |
c6c8fea2 SE |
838 | } |
839 | ||
840 | /* init the vis server. this may only be called when if_list is already | |
9cfc7bd6 SE |
841 | * initialized (e.g. bat0 is initialized, interfaces have been added) |
842 | */ | |
d0f714f4 | 843 | int batadv_vis_init(struct bat_priv *bat_priv) |
c6c8fea2 | 844 | { |
96412690 | 845 | struct batadv_vis_packet *packet; |
c6c8fea2 | 846 | int hash_added; |
347c80f0 | 847 | unsigned int len; |
42d0b044 | 848 | unsigned long first_seen; |
96412690 | 849 | struct sk_buff *tmp_skb; |
c6c8fea2 SE |
850 | |
851 | if (bat_priv->vis_hash) | |
5346c35e | 852 | return 0; |
c6c8fea2 SE |
853 | |
854 | spin_lock_bh(&bat_priv->vis_hash_lock); | |
855 | ||
1a8eaf07 | 856 | bat_priv->vis_hash = batadv_hash_new(256); |
c6c8fea2 SE |
857 | if (!bat_priv->vis_hash) { |
858 | pr_err("Can't initialize vis_hash\n"); | |
859 | goto err; | |
860 | } | |
861 | ||
347c80f0 | 862 | bat_priv->my_vis_info = kmalloc(BATADV_MAX_VIS_PACKET_SIZE, GFP_ATOMIC); |
320f422f | 863 | if (!bat_priv->my_vis_info) |
c6c8fea2 | 864 | goto err; |
c6c8fea2 | 865 | |
347c80f0 SE |
866 | len = sizeof(*packet) + BATADV_MAX_VIS_PACKET_SIZE + ETH_HLEN; |
867 | bat_priv->my_vis_info->skb_packet = dev_alloc_skb(len); | |
c6c8fea2 SE |
868 | if (!bat_priv->my_vis_info->skb_packet) |
869 | goto free_info; | |
870 | ||
0d125074 | 871 | skb_reserve(bat_priv->my_vis_info->skb_packet, ETH_HLEN); |
96412690 SE |
872 | tmp_skb = bat_priv->my_vis_info->skb_packet; |
873 | packet = (struct batadv_vis_packet *)skb_put(tmp_skb, sizeof(*packet)); | |
c6c8fea2 SE |
874 | |
875 | /* prefill the vis info */ | |
42d0b044 SE |
876 | first_seen = jiffies - msecs_to_jiffies(BATADV_VIS_INTERVAL); |
877 | bat_priv->my_vis_info->first_seen = first_seen; | |
c6c8fea2 SE |
878 | INIT_LIST_HEAD(&bat_priv->my_vis_info->recv_list); |
879 | INIT_LIST_HEAD(&bat_priv->my_vis_info->send_list); | |
880 | kref_init(&bat_priv->my_vis_info->refcount); | |
881 | bat_priv->my_vis_info->bat_priv = bat_priv; | |
7e071c79 | 882 | packet->header.version = BATADV_COMPAT_VERSION; |
acd34afa | 883 | packet->header.packet_type = BATADV_VIS; |
42d0b044 | 884 | packet->header.ttl = BATADV_TTL; |
c6c8fea2 SE |
885 | packet->seqno = 0; |
886 | packet->entries = 0; | |
887 | ||
888 | INIT_LIST_HEAD(&bat_priv->vis_send_list); | |
889 | ||
eaad8ad9 SE |
890 | hash_added = batadv_hash_add(bat_priv->vis_hash, batadv_vis_info_cmp, |
891 | batadv_vis_info_choose, | |
892 | bat_priv->my_vis_info, | |
c0a55929 | 893 | &bat_priv->my_vis_info->hash_entry); |
1a1f37d9 | 894 | if (hash_added != 0) { |
c6c8fea2 SE |
895 | pr_err("Can't add own vis packet into hash\n"); |
896 | /* not in hash, need to remove it manually. */ | |
eaad8ad9 | 897 | kref_put(&bat_priv->my_vis_info->refcount, batadv_free_info); |
c6c8fea2 SE |
898 | goto err; |
899 | } | |
900 | ||
901 | spin_unlock_bh(&bat_priv->vis_hash_lock); | |
eaad8ad9 | 902 | batadv_start_vis_timer(bat_priv); |
5346c35e | 903 | return 0; |
c6c8fea2 SE |
904 | |
905 | free_info: | |
906 | kfree(bat_priv->my_vis_info); | |
907 | bat_priv->my_vis_info = NULL; | |
908 | err: | |
909 | spin_unlock_bh(&bat_priv->vis_hash_lock); | |
d0f714f4 | 910 | batadv_vis_quit(bat_priv); |
5346c35e | 911 | return -ENOMEM; |
c6c8fea2 SE |
912 | } |
913 | ||
914 | /* Decrease the reference count on a hash item info */ | |
eaad8ad9 | 915 | static void batadv_free_info_ref(struct hlist_node *node, void *arg) |
c6c8fea2 | 916 | { |
7aadf889 | 917 | struct vis_info *info; |
c6c8fea2 | 918 | |
7aadf889 | 919 | info = container_of(node, struct vis_info, hash_entry); |
eaad8ad9 SE |
920 | batadv_send_list_del(info); |
921 | kref_put(&info->refcount, batadv_free_info); | |
c6c8fea2 SE |
922 | } |
923 | ||
924 | /* shutdown vis-server */ | |
d0f714f4 | 925 | void batadv_vis_quit(struct bat_priv *bat_priv) |
c6c8fea2 SE |
926 | { |
927 | if (!bat_priv->vis_hash) | |
928 | return; | |
929 | ||
930 | cancel_delayed_work_sync(&bat_priv->vis_work); | |
931 | ||
932 | spin_lock_bh(&bat_priv->vis_hash_lock); | |
933 | /* properly remove, kill timers ... */ | |
eaad8ad9 | 934 | batadv_hash_delete(bat_priv->vis_hash, batadv_free_info_ref, NULL); |
c6c8fea2 SE |
935 | bat_priv->vis_hash = NULL; |
936 | bat_priv->my_vis_info = NULL; | |
937 | spin_unlock_bh(&bat_priv->vis_hash_lock); | |
938 | } | |
939 | ||
940 | /* schedule packets for (re)transmission */ | |
eaad8ad9 | 941 | static void batadv_start_vis_timer(struct bat_priv *bat_priv) |
c6c8fea2 | 942 | { |
eaad8ad9 | 943 | INIT_DELAYED_WORK(&bat_priv->vis_work, batadv_send_vis_packets); |
3193e8fd | 944 | queue_delayed_work(batadv_event_workqueue, &bat_priv->vis_work, |
42d0b044 | 945 | msecs_to_jiffies(BATADV_VIS_INTERVAL)); |
c6c8fea2 | 946 | } |