Commit | Line | Data |
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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 | |
dec05074 AQ |
31 | /* hash class keys */ |
32 | static struct lock_class_key batadv_vis_hash_lock_class_key; | |
33 | ||
c6c8fea2 | 34 | /* free the info */ |
eaad8ad9 | 35 | static void batadv_free_info(struct kref *ref) |
c6c8fea2 | 36 | { |
56303d34 SE |
37 | struct batadv_vis_info *info; |
38 | struct batadv_priv *bat_priv; | |
28500f07 | 39 | struct batadv_vis_recvlist_node *entry, *tmp; |
56303d34 SE |
40 | |
41 | info = container_of(ref, struct batadv_vis_info, refcount); | |
42 | bat_priv = info->bat_priv; | |
c6c8fea2 SE |
43 | |
44 | list_del_init(&info->send_list); | |
807736f6 | 45 | spin_lock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 SE |
46 | list_for_each_entry_safe(entry, tmp, &info->recv_list, list) { |
47 | list_del(&entry->list); | |
48 | kfree(entry); | |
49 | } | |
50 | ||
807736f6 | 51 | spin_unlock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 | 52 | kfree_skb(info->skb_packet); |
dda9fc6b | 53 | kfree(info); |
c6c8fea2 SE |
54 | } |
55 | ||
56 | /* Compare two vis packets, used by the hashing algorithm */ | |
eaad8ad9 | 57 | static int batadv_vis_info_cmp(const struct hlist_node *node, const void *data2) |
c6c8fea2 | 58 | { |
56303d34 | 59 | const struct batadv_vis_info *d1, *d2; |
96412690 | 60 | const struct batadv_vis_packet *p1, *p2; |
7aadf889 | 61 | |
56303d34 | 62 | d1 = container_of(node, struct batadv_vis_info, hash_entry); |
c6c8fea2 | 63 | d2 = data2; |
96412690 SE |
64 | p1 = (struct batadv_vis_packet *)d1->skb_packet->data; |
65 | p2 = (struct batadv_vis_packet *)d2->skb_packet->data; | |
1eda58bf | 66 | return batadv_compare_eth(p1->vis_orig, p2->vis_orig); |
c6c8fea2 SE |
67 | } |
68 | ||
9cfc7bd6 SE |
69 | /* hash function to choose an entry in a hash table of given size |
70 | * hash algorithm from http://en.wikipedia.org/wiki/Hash_table | |
71 | */ | |
eaad8ad9 | 72 | static uint32_t batadv_vis_info_choose(const void *data, uint32_t size) |
c6c8fea2 | 73 | { |
56303d34 | 74 | const struct batadv_vis_info *vis_info = data; |
96412690 | 75 | const struct batadv_vis_packet *packet; |
747e4221 | 76 | const unsigned char *key; |
c6c8fea2 SE |
77 | uint32_t hash = 0; |
78 | size_t i; | |
79 | ||
96412690 | 80 | packet = (struct batadv_vis_packet *)vis_info->skb_packet->data; |
c6c8fea2 SE |
81 | key = packet->vis_orig; |
82 | for (i = 0; i < ETH_ALEN; i++) { | |
83 | hash += key[i]; | |
84 | hash += (hash << 10); | |
85 | hash ^= (hash >> 6); | |
86 | } | |
87 | ||
88 | hash += (hash << 3); | |
89 | hash ^= (hash >> 11); | |
90 | hash += (hash << 15); | |
91 | ||
92 | return hash % size; | |
93 | } | |
94 | ||
56303d34 SE |
95 | static struct batadv_vis_info * |
96 | batadv_vis_hash_find(struct batadv_priv *bat_priv, const void *data) | |
7aadf889 | 97 | { |
807736f6 | 98 | struct batadv_hashtable *hash = bat_priv->vis.hash; |
7aadf889 ML |
99 | struct hlist_head *head; |
100 | struct hlist_node *node; | |
56303d34 | 101 | struct batadv_vis_info *vis_info, *vis_info_tmp = NULL; |
c90681b8 | 102 | uint32_t index; |
7aadf889 ML |
103 | |
104 | if (!hash) | |
105 | return NULL; | |
106 | ||
eaad8ad9 | 107 | index = batadv_vis_info_choose(data, hash->size); |
7aadf889 ML |
108 | head = &hash->table[index]; |
109 | ||
110 | rcu_read_lock(); | |
111 | hlist_for_each_entry_rcu(vis_info, node, head, hash_entry) { | |
eaad8ad9 | 112 | if (!batadv_vis_info_cmp(node, data)) |
7aadf889 ML |
113 | continue; |
114 | ||
115 | vis_info_tmp = vis_info; | |
116 | break; | |
117 | } | |
118 | rcu_read_unlock(); | |
119 | ||
120 | return vis_info_tmp; | |
121 | } | |
122 | ||
c6c8fea2 | 123 | /* insert interface to the list of interfaces of one originator, if it |
9cfc7bd6 SE |
124 | * does not already exist in the list |
125 | */ | |
eaad8ad9 SE |
126 | static void batadv_vis_data_insert_interface(const uint8_t *interface, |
127 | struct hlist_head *if_list, | |
128 | bool primary) | |
c6c8fea2 | 129 | { |
015b4ae4 | 130 | struct batadv_vis_if_list_entry *entry; |
c6c8fea2 SE |
131 | struct hlist_node *pos; |
132 | ||
133 | hlist_for_each_entry(entry, pos, if_list, list) { | |
1eda58bf | 134 | if (batadv_compare_eth(entry->addr, interface)) |
c6c8fea2 SE |
135 | return; |
136 | } | |
137 | ||
015758d0 | 138 | /* it's a new address, add it to the list */ |
c6c8fea2 SE |
139 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); |
140 | if (!entry) | |
141 | return; | |
142 | memcpy(entry->addr, interface, ETH_ALEN); | |
143 | entry->primary = primary; | |
144 | hlist_add_head(&entry->list, if_list); | |
145 | } | |
146 | ||
28afd3c0 SE |
147 | static void batadv_vis_data_read_prim_sec(struct seq_file *seq, |
148 | const struct hlist_head *if_list) | |
c6c8fea2 | 149 | { |
015b4ae4 | 150 | struct batadv_vis_if_list_entry *entry; |
c6c8fea2 | 151 | struct hlist_node *pos; |
c6c8fea2 SE |
152 | |
153 | hlist_for_each_entry(entry, pos, if_list, list) { | |
154 | if (entry->primary) | |
28afd3c0 | 155 | seq_printf(seq, "PRIMARY, "); |
c6c8fea2 | 156 | else |
28afd3c0 | 157 | seq_printf(seq, "SEC %pM, ", entry->addr); |
c6c8fea2 | 158 | } |
28afd3c0 SE |
159 | } |
160 | ||
161 | /* read an entry */ | |
56303d34 SE |
162 | static ssize_t |
163 | batadv_vis_data_read_entry(struct seq_file *seq, | |
164 | const struct batadv_vis_info_entry *entry, | |
165 | const uint8_t *src, bool primary) | |
28afd3c0 SE |
166 | { |
167 | if (primary && entry->quality == 0) | |
168 | return seq_printf(seq, "TT %pM, ", entry->dest); | |
169 | else if (batadv_compare_eth(entry->src, src)) | |
170 | return seq_printf(seq, "TQ %pM %d, ", entry->dest, | |
171 | entry->quality); | |
c6c8fea2 | 172 | |
28afd3c0 | 173 | return 0; |
c6c8fea2 SE |
174 | } |
175 | ||
56303d34 SE |
176 | static void |
177 | batadv_vis_data_insert_interfaces(struct hlist_head *list, | |
178 | struct batadv_vis_packet *packet, | |
179 | struct batadv_vis_info_entry *entries) | |
c6c8fea2 | 180 | { |
28afd3c0 SE |
181 | int i; |
182 | ||
183 | for (i = 0; i < packet->entries; i++) { | |
184 | if (entries[i].quality == 0) | |
185 | continue; | |
186 | ||
187 | if (batadv_compare_eth(entries[i].src, packet->vis_orig)) | |
188 | continue; | |
189 | ||
190 | batadv_vis_data_insert_interface(entries[i].src, list, false); | |
191 | } | |
192 | } | |
193 | ||
194 | static void batadv_vis_data_read_entries(struct seq_file *seq, | |
195 | struct hlist_head *list, | |
96412690 | 196 | struct batadv_vis_packet *packet, |
56303d34 | 197 | struct batadv_vis_info_entry *entries) |
28afd3c0 SE |
198 | { |
199 | int i; | |
015b4ae4 | 200 | struct batadv_vis_if_list_entry *entry; |
c6c8fea2 | 201 | struct hlist_node *pos; |
c6c8fea2 | 202 | |
28afd3c0 SE |
203 | hlist_for_each_entry(entry, pos, list, list) { |
204 | seq_printf(seq, "%pM,", entry->addr); | |
205 | ||
206 | for (i = 0; i < packet->entries; i++) | |
207 | batadv_vis_data_read_entry(seq, &entries[i], | |
208 | entry->addr, entry->primary); | |
209 | ||
210 | /* add primary/secondary records */ | |
211 | if (batadv_compare_eth(entry->addr, packet->vis_orig)) | |
212 | batadv_vis_data_read_prim_sec(seq, list); | |
c6c8fea2 | 213 | |
28afd3c0 SE |
214 | seq_printf(seq, "\n"); |
215 | } | |
c6c8fea2 SE |
216 | } |
217 | ||
28afd3c0 SE |
218 | static void batadv_vis_seq_print_text_bucket(struct seq_file *seq, |
219 | const struct hlist_head *head) | |
c6c8fea2 | 220 | { |
28afd3c0 | 221 | struct hlist_node *node; |
56303d34 | 222 | struct batadv_vis_info *info; |
96412690 | 223 | struct batadv_vis_packet *packet; |
28afd3c0 | 224 | uint8_t *entries_pos; |
56303d34 | 225 | struct batadv_vis_info_entry *entries; |
015b4ae4 | 226 | struct batadv_vis_if_list_entry *entry; |
28afd3c0 | 227 | struct hlist_node *pos, *n; |
c6c8fea2 | 228 | |
28afd3c0 SE |
229 | HLIST_HEAD(vis_if_list); |
230 | ||
231 | hlist_for_each_entry_rcu(info, node, head, hash_entry) { | |
96412690 | 232 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
28afd3c0 | 233 | entries_pos = (uint8_t *)packet + sizeof(*packet); |
56303d34 | 234 | entries = (struct batadv_vis_info_entry *)entries_pos; |
28afd3c0 SE |
235 | |
236 | batadv_vis_data_insert_interface(packet->vis_orig, &vis_if_list, | |
237 | true); | |
238 | batadv_vis_data_insert_interfaces(&vis_if_list, packet, | |
239 | entries); | |
240 | batadv_vis_data_read_entries(seq, &vis_if_list, packet, | |
241 | entries); | |
242 | ||
243 | hlist_for_each_entry_safe(entry, pos, n, &vis_if_list, list) { | |
244 | hlist_del(&entry->list); | |
245 | kfree(entry); | |
246 | } | |
247 | } | |
c6c8fea2 SE |
248 | } |
249 | ||
d0f714f4 | 250 | int batadv_vis_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 | 251 | { |
56303d34 | 252 | struct batadv_hard_iface *primary_if; |
c6c8fea2 | 253 | struct hlist_head *head; |
c6c8fea2 | 254 | struct net_device *net_dev = (struct net_device *)seq->private; |
56303d34 | 255 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 256 | struct batadv_hashtable *hash = bat_priv->vis.hash; |
c90681b8 | 257 | uint32_t i; |
28afd3c0 | 258 | int ret = 0; |
c6c8fea2 | 259 | int vis_server = atomic_read(&bat_priv->vis_mode); |
c6c8fea2 | 260 | |
e5d89254 | 261 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
262 | if (!primary_if) |
263 | goto out; | |
264 | ||
acd34afa | 265 | if (vis_server == BATADV_VIS_TYPE_CLIENT_UPDATE) |
32ae9b22 | 266 | goto out; |
c6c8fea2 | 267 | |
807736f6 | 268 | spin_lock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 SE |
269 | for (i = 0; i < hash->size; i++) { |
270 | head = &hash->table[i]; | |
28afd3c0 | 271 | batadv_vis_seq_print_text_bucket(seq, head); |
c6c8fea2 | 272 | } |
807736f6 | 273 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 | 274 | |
32ae9b22 ML |
275 | out: |
276 | if (primary_if) | |
e5d89254 | 277 | batadv_hardif_free_ref(primary_if); |
32ae9b22 | 278 | return ret; |
c6c8fea2 SE |
279 | } |
280 | ||
281 | /* add the info packet to the send list, if it was not | |
9cfc7bd6 SE |
282 | * already linked in. |
283 | */ | |
56303d34 SE |
284 | static void batadv_send_list_add(struct batadv_priv *bat_priv, |
285 | struct batadv_vis_info *info) | |
c6c8fea2 SE |
286 | { |
287 | if (list_empty(&info->send_list)) { | |
288 | kref_get(&info->refcount); | |
807736f6 | 289 | list_add_tail(&info->send_list, &bat_priv->vis.send_list); |
c6c8fea2 SE |
290 | } |
291 | } | |
292 | ||
293 | /* delete the info packet from the send list, if it was | |
9cfc7bd6 SE |
294 | * linked in. |
295 | */ | |
56303d34 | 296 | static void batadv_send_list_del(struct batadv_vis_info *info) |
c6c8fea2 SE |
297 | { |
298 | if (!list_empty(&info->send_list)) { | |
299 | list_del_init(&info->send_list); | |
eaad8ad9 | 300 | kref_put(&info->refcount, batadv_free_info); |
c6c8fea2 SE |
301 | } |
302 | } | |
303 | ||
304 | /* tries to add one entry to the receive list. */ | |
56303d34 | 305 | static void batadv_recv_list_add(struct batadv_priv *bat_priv, |
eaad8ad9 | 306 | struct list_head *recv_list, const char *mac) |
c6c8fea2 | 307 | { |
28500f07 | 308 | struct batadv_vis_recvlist_node *entry; |
c6c8fea2 | 309 | |
704509b8 | 310 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); |
c6c8fea2 SE |
311 | if (!entry) |
312 | return; | |
313 | ||
314 | memcpy(entry->mac, mac, ETH_ALEN); | |
807736f6 | 315 | spin_lock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 | 316 | list_add_tail(&entry->list, recv_list); |
807736f6 | 317 | spin_unlock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 SE |
318 | } |
319 | ||
320 | /* returns 1 if this mac is in the recv_list */ | |
56303d34 | 321 | static int batadv_recv_list_is_in(struct batadv_priv *bat_priv, |
eaad8ad9 SE |
322 | const struct list_head *recv_list, |
323 | const char *mac) | |
c6c8fea2 | 324 | { |
28500f07 | 325 | const struct batadv_vis_recvlist_node *entry; |
c6c8fea2 | 326 | |
807736f6 | 327 | spin_lock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 | 328 | list_for_each_entry(entry, recv_list, list) { |
1eda58bf | 329 | if (batadv_compare_eth(entry->mac, mac)) { |
807736f6 | 330 | spin_unlock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 SE |
331 | return 1; |
332 | } | |
333 | } | |
807736f6 | 334 | spin_unlock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 SE |
335 | return 0; |
336 | } | |
337 | ||
338 | /* try to add the packet to the vis_hash. return NULL if invalid (e.g. too old, | |
339 | * broken.. ). vis hash must be locked outside. is_new is set when the packet | |
9cfc7bd6 SE |
340 | * is newer than old entries in the hash. |
341 | */ | |
56303d34 SE |
342 | static struct batadv_vis_info * |
343 | batadv_add_packet(struct batadv_priv *bat_priv, | |
344 | struct batadv_vis_packet *vis_packet, int vis_info_len, | |
345 | int *is_new, int make_broadcast) | |
c6c8fea2 | 346 | { |
56303d34 | 347 | struct batadv_vis_info *info, *old_info; |
96412690 | 348 | struct batadv_vis_packet *search_packet, *old_packet; |
56303d34 | 349 | struct batadv_vis_info search_elem; |
96412690 SE |
350 | struct batadv_vis_packet *packet; |
351 | struct sk_buff *tmp_skb; | |
c6c8fea2 | 352 | int hash_added; |
96412690 | 353 | size_t len; |
56303d34 | 354 | size_t max_entries; |
c6c8fea2 SE |
355 | |
356 | *is_new = 0; | |
357 | /* sanity check */ | |
807736f6 | 358 | if (!bat_priv->vis.hash) |
c6c8fea2 SE |
359 | return NULL; |
360 | ||
361 | /* see if the packet is already in vis_hash */ | |
704509b8 | 362 | search_elem.skb_packet = dev_alloc_skb(sizeof(*search_packet)); |
c6c8fea2 SE |
363 | if (!search_elem.skb_packet) |
364 | return NULL; | |
96412690 SE |
365 | len = sizeof(*search_packet); |
366 | tmp_skb = search_elem.skb_packet; | |
367 | search_packet = (struct batadv_vis_packet *)skb_put(tmp_skb, len); | |
c6c8fea2 SE |
368 | |
369 | memcpy(search_packet->vis_orig, vis_packet->vis_orig, ETH_ALEN); | |
eaad8ad9 | 370 | old_info = batadv_vis_hash_find(bat_priv, &search_elem); |
c6c8fea2 SE |
371 | kfree_skb(search_elem.skb_packet); |
372 | ||
373 | if (old_info) { | |
96412690 SE |
374 | tmp_skb = old_info->skb_packet; |
375 | old_packet = (struct batadv_vis_packet *)tmp_skb->data; | |
3e34819e SE |
376 | if (!batadv_seq_after(ntohl(vis_packet->seqno), |
377 | ntohl(old_packet->seqno))) { | |
c6c8fea2 | 378 | if (old_packet->seqno == vis_packet->seqno) { |
eaad8ad9 SE |
379 | batadv_recv_list_add(bat_priv, |
380 | &old_info->recv_list, | |
381 | vis_packet->sender_orig); | |
c6c8fea2 SE |
382 | return old_info; |
383 | } else { | |
384 | /* newer packet is already in hash. */ | |
385 | return NULL; | |
386 | } | |
387 | } | |
388 | /* remove old entry */ | |
807736f6 | 389 | batadv_hash_remove(bat_priv->vis.hash, batadv_vis_info_cmp, |
eaad8ad9 SE |
390 | batadv_vis_info_choose, old_info); |
391 | batadv_send_list_del(old_info); | |
392 | kref_put(&old_info->refcount, batadv_free_info); | |
c6c8fea2 SE |
393 | } |
394 | ||
704509b8 | 395 | info = kmalloc(sizeof(*info), GFP_ATOMIC); |
c6c8fea2 SE |
396 | if (!info) |
397 | return NULL; | |
398 | ||
96412690 | 399 | len = sizeof(*packet) + vis_info_len; |
5b246574 | 400 | info->skb_packet = dev_alloc_skb(len + ETH_HLEN + NET_IP_ALIGN); |
c6c8fea2 SE |
401 | if (!info->skb_packet) { |
402 | kfree(info); | |
403 | return NULL; | |
404 | } | |
5b246574 | 405 | skb_reserve(info->skb_packet, ETH_HLEN + NET_IP_ALIGN); |
96412690 | 406 | packet = (struct batadv_vis_packet *)skb_put(info->skb_packet, len); |
c6c8fea2 SE |
407 | |
408 | kref_init(&info->refcount); | |
409 | INIT_LIST_HEAD(&info->send_list); | |
410 | INIT_LIST_HEAD(&info->recv_list); | |
411 | info->first_seen = jiffies; | |
412 | info->bat_priv = bat_priv; | |
96412690 | 413 | memcpy(packet, vis_packet, len); |
c6c8fea2 SE |
414 | |
415 | /* initialize and add new packet. */ | |
416 | *is_new = 1; | |
417 | ||
418 | /* Make it a broadcast packet, if required */ | |
419 | if (make_broadcast) | |
3193e8fd | 420 | memcpy(packet->target_orig, batadv_broadcast_addr, ETH_ALEN); |
c6c8fea2 SE |
421 | |
422 | /* repair if entries is longer than packet. */ | |
56303d34 SE |
423 | max_entries = vis_info_len / sizeof(struct batadv_vis_info_entry); |
424 | if (packet->entries > max_entries) | |
425 | packet->entries = max_entries; | |
c6c8fea2 | 426 | |
eaad8ad9 | 427 | batadv_recv_list_add(bat_priv, &info->recv_list, packet->sender_orig); |
c6c8fea2 SE |
428 | |
429 | /* try to add it */ | |
807736f6 | 430 | hash_added = batadv_hash_add(bat_priv->vis.hash, batadv_vis_info_cmp, |
eaad8ad9 SE |
431 | batadv_vis_info_choose, info, |
432 | &info->hash_entry); | |
1a1f37d9 | 433 | if (hash_added != 0) { |
c6c8fea2 | 434 | /* did not work (for some reason) */ |
eaad8ad9 | 435 | kref_put(&info->refcount, batadv_free_info); |
c6c8fea2 SE |
436 | info = NULL; |
437 | } | |
438 | ||
439 | return info; | |
440 | } | |
441 | ||
442 | /* handle the server sync packet, forward if needed. */ | |
56303d34 | 443 | void batadv_receive_server_sync_packet(struct batadv_priv *bat_priv, |
96412690 | 444 | struct batadv_vis_packet *vis_packet, |
d0f714f4 | 445 | int vis_info_len) |
c6c8fea2 | 446 | { |
56303d34 | 447 | struct batadv_vis_info *info; |
c6c8fea2 SE |
448 | int is_new, make_broadcast; |
449 | int vis_server = atomic_read(&bat_priv->vis_mode); | |
450 | ||
acd34afa | 451 | make_broadcast = (vis_server == BATADV_VIS_TYPE_SERVER_SYNC); |
c6c8fea2 | 452 | |
807736f6 | 453 | spin_lock_bh(&bat_priv->vis.hash_lock); |
eaad8ad9 SE |
454 | info = batadv_add_packet(bat_priv, vis_packet, vis_info_len, |
455 | &is_new, make_broadcast); | |
c6c8fea2 SE |
456 | if (!info) |
457 | goto end; | |
458 | ||
459 | /* only if we are server ourselves and packet is newer than the one in | |
9cfc7bd6 SE |
460 | * hash. |
461 | */ | |
acd34afa | 462 | if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC && is_new) |
eaad8ad9 | 463 | batadv_send_list_add(bat_priv, info); |
c6c8fea2 | 464 | end: |
807736f6 | 465 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 SE |
466 | } |
467 | ||
468 | /* handle an incoming client update packet and schedule forward if needed. */ | |
56303d34 | 469 | void batadv_receive_client_update_packet(struct batadv_priv *bat_priv, |
96412690 | 470 | struct batadv_vis_packet *vis_packet, |
d0f714f4 | 471 | int vis_info_len) |
c6c8fea2 | 472 | { |
56303d34 | 473 | struct batadv_vis_info *info; |
96412690 | 474 | struct batadv_vis_packet *packet; |
c6c8fea2 SE |
475 | int is_new; |
476 | int vis_server = atomic_read(&bat_priv->vis_mode); | |
477 | int are_target = 0; | |
478 | ||
479 | /* clients shall not broadcast. */ | |
480 | if (is_broadcast_ether_addr(vis_packet->target_orig)) | |
481 | return; | |
482 | ||
483 | /* Are we the target for this VIS packet? */ | |
acd34afa | 484 | if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC && |
3193e8fd | 485 | batadv_is_my_mac(vis_packet->target_orig)) |
c6c8fea2 SE |
486 | are_target = 1; |
487 | ||
807736f6 | 488 | spin_lock_bh(&bat_priv->vis.hash_lock); |
eaad8ad9 SE |
489 | info = batadv_add_packet(bat_priv, vis_packet, vis_info_len, |
490 | &is_new, are_target); | |
c6c8fea2 SE |
491 | |
492 | if (!info) | |
493 | goto end; | |
494 | /* note that outdated packets will be dropped at this point. */ | |
495 | ||
96412690 | 496 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
497 | |
498 | /* send only if we're the target server or ... */ | |
499 | if (are_target && is_new) { | |
acd34afa | 500 | packet->vis_type = BATADV_VIS_TYPE_SERVER_SYNC; /* upgrade! */ |
eaad8ad9 | 501 | batadv_send_list_add(bat_priv, info); |
c6c8fea2 SE |
502 | |
503 | /* ... we're not the recipient (and thus need to forward). */ | |
3193e8fd | 504 | } else if (!batadv_is_my_mac(packet->target_orig)) { |
eaad8ad9 | 505 | batadv_send_list_add(bat_priv, info); |
c6c8fea2 SE |
506 | } |
507 | ||
508 | end: | |
807736f6 | 509 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 SE |
510 | } |
511 | ||
512 | /* Walk the originators and find the VIS server with the best tq. Set the packet | |
513 | * address to its address and return the best_tq. | |
514 | * | |
9cfc7bd6 SE |
515 | * Must be called with the originator hash locked |
516 | */ | |
56303d34 SE |
517 | static int batadv_find_best_vis_server(struct batadv_priv *bat_priv, |
518 | struct batadv_vis_info *info) | |
c6c8fea2 | 519 | { |
5bf74e9c | 520 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
56303d34 | 521 | struct batadv_neigh_node *router; |
7aadf889 | 522 | struct hlist_node *node; |
c6c8fea2 | 523 | struct hlist_head *head; |
56303d34 | 524 | struct batadv_orig_node *orig_node; |
96412690 | 525 | struct batadv_vis_packet *packet; |
c90681b8 AQ |
526 | int best_tq = -1; |
527 | uint32_t i; | |
c6c8fea2 | 528 | |
96412690 | 529 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
530 | |
531 | for (i = 0; i < hash->size; i++) { | |
532 | head = &hash->table[i]; | |
533 | ||
fb778ea1 | 534 | rcu_read_lock(); |
7aadf889 | 535 | hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) { |
7d211efc | 536 | router = batadv_orig_node_get_router(orig_node); |
e1a5382f LL |
537 | if (!router) |
538 | continue; | |
539 | ||
acd34afa | 540 | if ((orig_node->flags & BATADV_VIS_SERVER) && |
e1a5382f LL |
541 | (router->tq_avg > best_tq)) { |
542 | best_tq = router->tq_avg; | |
c6c8fea2 SE |
543 | memcpy(packet->target_orig, orig_node->orig, |
544 | ETH_ALEN); | |
545 | } | |
7d211efc | 546 | batadv_neigh_node_free_ref(router); |
c6c8fea2 | 547 | } |
fb778ea1 | 548 | rcu_read_unlock(); |
c6c8fea2 SE |
549 | } |
550 | ||
551 | return best_tq; | |
552 | } | |
553 | ||
554 | /* Return true if the vis packet is full. */ | |
56303d34 | 555 | static bool batadv_vis_packet_full(const struct batadv_vis_info *info) |
c6c8fea2 | 556 | { |
96412690 | 557 | const struct batadv_vis_packet *packet; |
56303d34 | 558 | size_t num; |
347c80f0 | 559 | |
96412690 | 560 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
56303d34 | 561 | num = BATADV_MAX_VIS_PACKET_SIZE / sizeof(struct batadv_vis_info_entry); |
c6c8fea2 | 562 | |
56303d34 | 563 | if (num < packet->entries + 1) |
c6c8fea2 SE |
564 | return true; |
565 | return false; | |
566 | } | |
567 | ||
568 | /* generates a packet of own vis data, | |
9cfc7bd6 SE |
569 | * returns 0 on success, -1 if no packet could be generated |
570 | */ | |
56303d34 | 571 | static int batadv_generate_vis_packet(struct batadv_priv *bat_priv) |
c6c8fea2 | 572 | { |
5bf74e9c | 573 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
7aadf889 | 574 | struct hlist_node *node; |
c6c8fea2 | 575 | struct hlist_head *head; |
56303d34 SE |
576 | struct batadv_orig_node *orig_node; |
577 | struct batadv_neigh_node *router; | |
807736f6 | 578 | struct batadv_vis_info *info = bat_priv->vis.my_info; |
96412690 | 579 | struct batadv_vis_packet *packet; |
56303d34 SE |
580 | struct batadv_vis_info_entry *entry; |
581 | struct batadv_tt_common_entry *tt_common_entry; | |
c67893d1 | 582 | uint8_t *packet_pos; |
c90681b8 AQ |
583 | int best_tq = -1; |
584 | uint32_t i; | |
c6c8fea2 SE |
585 | |
586 | info->first_seen = jiffies; | |
96412690 | 587 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
588 | packet->vis_type = atomic_read(&bat_priv->vis_mode); |
589 | ||
3193e8fd | 590 | memcpy(packet->target_orig, batadv_broadcast_addr, ETH_ALEN); |
42d0b044 | 591 | packet->header.ttl = BATADV_TTL; |
c6c8fea2 SE |
592 | packet->seqno = htonl(ntohl(packet->seqno) + 1); |
593 | packet->entries = 0; | |
162d549c | 594 | packet->reserved = 0; |
704509b8 | 595 | skb_trim(info->skb_packet, sizeof(*packet)); |
c6c8fea2 | 596 | |
acd34afa | 597 | if (packet->vis_type == BATADV_VIS_TYPE_CLIENT_UPDATE) { |
eaad8ad9 | 598 | best_tq = batadv_find_best_vis_server(bat_priv, info); |
c6c8fea2 | 599 | |
d0072609 | 600 | if (best_tq < 0) |
5346c35e | 601 | return best_tq; |
c6c8fea2 SE |
602 | } |
603 | ||
604 | for (i = 0; i < hash->size; i++) { | |
605 | head = &hash->table[i]; | |
606 | ||
fb778ea1 | 607 | rcu_read_lock(); |
7aadf889 | 608 | hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) { |
7d211efc | 609 | router = batadv_orig_node_get_router(orig_node); |
e1a5382f | 610 | if (!router) |
c6c8fea2 SE |
611 | continue; |
612 | ||
1eda58bf | 613 | if (!batadv_compare_eth(router->addr, orig_node->orig)) |
e1a5382f | 614 | goto next; |
c6c8fea2 | 615 | |
e9a4f295 | 616 | if (router->if_incoming->if_status != BATADV_IF_ACTIVE) |
e1a5382f | 617 | goto next; |
c6c8fea2 | 618 | |
e1a5382f LL |
619 | if (router->tq_avg < 1) |
620 | goto next; | |
c6c8fea2 SE |
621 | |
622 | /* fill one entry into buffer. */ | |
c67893d1 SE |
623 | packet_pos = skb_put(info->skb_packet, sizeof(*entry)); |
624 | entry = (struct batadv_vis_info_entry *)packet_pos; | |
c6c8fea2 | 625 | memcpy(entry->src, |
e1a5382f | 626 | router->if_incoming->net_dev->dev_addr, |
c6c8fea2 SE |
627 | ETH_ALEN); |
628 | memcpy(entry->dest, orig_node->orig, ETH_ALEN); | |
e1a5382f | 629 | entry->quality = router->tq_avg; |
c6c8fea2 SE |
630 | packet->entries++; |
631 | ||
e1a5382f | 632 | next: |
7d211efc | 633 | batadv_neigh_node_free_ref(router); |
e1a5382f | 634 | |
eaad8ad9 | 635 | if (batadv_vis_packet_full(info)) |
d0072609 | 636 | goto unlock; |
c6c8fea2 | 637 | } |
fb778ea1 | 638 | rcu_read_unlock(); |
c6c8fea2 SE |
639 | } |
640 | ||
807736f6 | 641 | hash = bat_priv->tt.local_hash; |
c6c8fea2 | 642 | |
c6c8fea2 SE |
643 | for (i = 0; i < hash->size; i++) { |
644 | head = &hash->table[i]; | |
645 | ||
7683fdc1 | 646 | rcu_read_lock(); |
48100bac | 647 | hlist_for_each_entry_rcu(tt_common_entry, node, head, |
7683fdc1 | 648 | hash_entry) { |
c67893d1 SE |
649 | packet_pos = skb_put(info->skb_packet, sizeof(*entry)); |
650 | entry = (struct batadv_vis_info_entry *)packet_pos; | |
c6c8fea2 | 651 | memset(entry->src, 0, ETH_ALEN); |
48100bac | 652 | memcpy(entry->dest, tt_common_entry->addr, ETH_ALEN); |
2dafb49d | 653 | entry->quality = 0; /* 0 means TT */ |
c6c8fea2 SE |
654 | packet->entries++; |
655 | ||
eaad8ad9 | 656 | if (batadv_vis_packet_full(info)) |
7683fdc1 | 657 | goto unlock; |
c6c8fea2 | 658 | } |
7683fdc1 | 659 | rcu_read_unlock(); |
c6c8fea2 SE |
660 | } |
661 | ||
c6c8fea2 | 662 | return 0; |
d0072609 ML |
663 | |
664 | unlock: | |
665 | rcu_read_unlock(); | |
666 | return 0; | |
c6c8fea2 SE |
667 | } |
668 | ||
669 | /* free old vis packets. Must be called with this vis_hash_lock | |
9cfc7bd6 SE |
670 | * held |
671 | */ | |
56303d34 | 672 | static void batadv_purge_vis_packets(struct batadv_priv *bat_priv) |
c6c8fea2 | 673 | { |
c90681b8 | 674 | uint32_t i; |
807736f6 | 675 | struct batadv_hashtable *hash = bat_priv->vis.hash; |
7aadf889 | 676 | struct hlist_node *node, *node_tmp; |
c6c8fea2 | 677 | struct hlist_head *head; |
56303d34 | 678 | struct batadv_vis_info *info; |
c6c8fea2 SE |
679 | |
680 | for (i = 0; i < hash->size; i++) { | |
681 | head = &hash->table[i]; | |
682 | ||
7aadf889 ML |
683 | hlist_for_each_entry_safe(info, node, node_tmp, |
684 | head, hash_entry) { | |
c6c8fea2 | 685 | /* never purge own data. */ |
807736f6 | 686 | if (info == bat_priv->vis.my_info) |
c6c8fea2 SE |
687 | continue; |
688 | ||
1eda58bf | 689 | if (batadv_has_timed_out(info->first_seen, |
edbf7ff7 | 690 | BATADV_VIS_TIMEOUT)) { |
7aadf889 | 691 | hlist_del(node); |
eaad8ad9 SE |
692 | batadv_send_list_del(info); |
693 | kref_put(&info->refcount, batadv_free_info); | |
c6c8fea2 SE |
694 | } |
695 | } | |
696 | } | |
697 | } | |
698 | ||
56303d34 SE |
699 | static void batadv_broadcast_vis_packet(struct batadv_priv *bat_priv, |
700 | struct batadv_vis_info *info) | |
c6c8fea2 | 701 | { |
5bf74e9c | 702 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
7aadf889 | 703 | struct hlist_node *node; |
c6c8fea2 | 704 | struct hlist_head *head; |
56303d34 | 705 | struct batadv_orig_node *orig_node; |
96412690 | 706 | struct batadv_vis_packet *packet; |
c6c8fea2 | 707 | struct sk_buff *skb; |
c90681b8 | 708 | uint32_t i; |
c6c8fea2 SE |
709 | |
710 | ||
96412690 | 711 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
712 | |
713 | /* send to all routers in range. */ | |
714 | for (i = 0; i < hash->size; i++) { | |
715 | head = &hash->table[i]; | |
716 | ||
fb778ea1 | 717 | rcu_read_lock(); |
7aadf889 | 718 | hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) { |
c6c8fea2 | 719 | /* if it's a vis server and reachable, send it. */ |
acd34afa | 720 | if (!(orig_node->flags & BATADV_VIS_SERVER)) |
c6c8fea2 | 721 | continue; |
e1a5382f | 722 | |
c6c8fea2 | 723 | /* don't send it if we already received the packet from |
9cfc7bd6 SE |
724 | * this node. |
725 | */ | |
eaad8ad9 | 726 | if (batadv_recv_list_is_in(bat_priv, &info->recv_list, |
bb351ba0 | 727 | orig_node->orig)) |
c6c8fea2 SE |
728 | continue; |
729 | ||
730 | memcpy(packet->target_orig, orig_node->orig, ETH_ALEN); | |
c6c8fea2 | 731 | skb = skb_clone(info->skb_packet, GFP_ATOMIC); |
bb351ba0 MH |
732 | if (!skb) |
733 | continue; | |
c6c8fea2 | 734 | |
bb351ba0 MH |
735 | if (!batadv_send_skb_to_orig(skb, orig_node, NULL)) |
736 | kfree_skb(skb); | |
c6c8fea2 | 737 | } |
fb778ea1 | 738 | rcu_read_unlock(); |
c6c8fea2 | 739 | } |
c6c8fea2 SE |
740 | } |
741 | ||
56303d34 SE |
742 | static void batadv_unicast_vis_packet(struct batadv_priv *bat_priv, |
743 | struct batadv_vis_info *info) | |
c6c8fea2 | 744 | { |
56303d34 | 745 | struct batadv_orig_node *orig_node; |
c6c8fea2 | 746 | struct sk_buff *skb; |
96412690 | 747 | struct batadv_vis_packet *packet; |
c6c8fea2 | 748 | |
96412690 | 749 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 | 750 | |
da641193 | 751 | orig_node = batadv_orig_hash_find(bat_priv, packet->target_orig); |
44524fcd | 752 | if (!orig_node) |
e1a5382f | 753 | goto out; |
44524fcd | 754 | |
bb351ba0 MH |
755 | skb = skb_clone(info->skb_packet, GFP_ATOMIC); |
756 | if (!skb) | |
e1a5382f | 757 | goto out; |
c6c8fea2 | 758 | |
bb351ba0 MH |
759 | if (!batadv_send_skb_to_orig(skb, orig_node, NULL)) |
760 | kfree_skb(skb); | |
c6c8fea2 SE |
761 | |
762 | out: | |
44524fcd | 763 | if (orig_node) |
7d211efc | 764 | batadv_orig_node_free_ref(orig_node); |
c6c8fea2 SE |
765 | } |
766 | ||
eaad8ad9 | 767 | /* only send one vis packet. called from batadv_send_vis_packets() */ |
56303d34 SE |
768 | static void batadv_send_vis_packet(struct batadv_priv *bat_priv, |
769 | struct batadv_vis_info *info) | |
c6c8fea2 | 770 | { |
56303d34 | 771 | struct batadv_hard_iface *primary_if; |
96412690 | 772 | struct batadv_vis_packet *packet; |
c6c8fea2 | 773 | |
e5d89254 | 774 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
775 | if (!primary_if) |
776 | goto out; | |
777 | ||
96412690 | 778 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
76543d14 | 779 | if (packet->header.ttl < 2) { |
c6c8fea2 | 780 | pr_debug("Error - can't send vis packet: ttl exceeded\n"); |
32ae9b22 | 781 | goto out; |
c6c8fea2 SE |
782 | } |
783 | ||
32ae9b22 | 784 | memcpy(packet->sender_orig, primary_if->net_dev->dev_addr, ETH_ALEN); |
76543d14 | 785 | packet->header.ttl--; |
c6c8fea2 SE |
786 | |
787 | if (is_broadcast_ether_addr(packet->target_orig)) | |
eaad8ad9 | 788 | batadv_broadcast_vis_packet(bat_priv, info); |
c6c8fea2 | 789 | else |
eaad8ad9 | 790 | batadv_unicast_vis_packet(bat_priv, info); |
76543d14 | 791 | packet->header.ttl++; /* restore TTL */ |
32ae9b22 ML |
792 | |
793 | out: | |
794 | if (primary_if) | |
e5d89254 | 795 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
796 | } |
797 | ||
798 | /* called from timer; send (and maybe generate) vis packet. */ | |
eaad8ad9 | 799 | static void batadv_send_vis_packets(struct work_struct *work) |
c6c8fea2 | 800 | { |
bbb1f90e | 801 | struct delayed_work *delayed_work; |
56303d34 | 802 | struct batadv_priv *bat_priv; |
807736f6 | 803 | struct batadv_priv_vis *priv_vis; |
56303d34 | 804 | struct batadv_vis_info *info; |
c6c8fea2 | 805 | |
bbb1f90e | 806 | delayed_work = container_of(work, struct delayed_work, work); |
807736f6 SE |
807 | priv_vis = container_of(delayed_work, struct batadv_priv_vis, work); |
808 | bat_priv = container_of(priv_vis, struct batadv_priv, vis); | |
809 | spin_lock_bh(&bat_priv->vis.hash_lock); | |
eaad8ad9 | 810 | batadv_purge_vis_packets(bat_priv); |
c6c8fea2 | 811 | |
eaad8ad9 | 812 | if (batadv_generate_vis_packet(bat_priv) == 0) { |
c6c8fea2 | 813 | /* schedule if generation was successful */ |
807736f6 | 814 | batadv_send_list_add(bat_priv, bat_priv->vis.my_info); |
c6c8fea2 SE |
815 | } |
816 | ||
807736f6 SE |
817 | while (!list_empty(&bat_priv->vis.send_list)) { |
818 | info = list_first_entry(&bat_priv->vis.send_list, | |
1181e1da | 819 | typeof(*info), send_list); |
c6c8fea2 SE |
820 | |
821 | kref_get(&info->refcount); | |
807736f6 | 822 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 | 823 | |
eaad8ad9 | 824 | batadv_send_vis_packet(bat_priv, info); |
c6c8fea2 | 825 | |
807736f6 | 826 | spin_lock_bh(&bat_priv->vis.hash_lock); |
eaad8ad9 SE |
827 | batadv_send_list_del(info); |
828 | kref_put(&info->refcount, batadv_free_info); | |
c6c8fea2 | 829 | } |
807736f6 | 830 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
72414442 AQ |
831 | |
832 | queue_delayed_work(batadv_event_workqueue, &bat_priv->vis.work, | |
833 | msecs_to_jiffies(BATADV_VIS_INTERVAL)); | |
c6c8fea2 SE |
834 | } |
835 | ||
836 | /* init the vis server. this may only be called when if_list is already | |
9cfc7bd6 SE |
837 | * initialized (e.g. bat0 is initialized, interfaces have been added) |
838 | */ | |
56303d34 | 839 | int batadv_vis_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 840 | { |
96412690 | 841 | struct batadv_vis_packet *packet; |
c6c8fea2 | 842 | int hash_added; |
347c80f0 | 843 | unsigned int len; |
42d0b044 | 844 | unsigned long first_seen; |
96412690 | 845 | struct sk_buff *tmp_skb; |
c6c8fea2 | 846 | |
807736f6 | 847 | if (bat_priv->vis.hash) |
5346c35e | 848 | return 0; |
c6c8fea2 | 849 | |
807736f6 | 850 | spin_lock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 | 851 | |
807736f6 SE |
852 | bat_priv->vis.hash = batadv_hash_new(256); |
853 | if (!bat_priv->vis.hash) { | |
c6c8fea2 SE |
854 | pr_err("Can't initialize vis_hash\n"); |
855 | goto err; | |
856 | } | |
857 | ||
dec05074 AQ |
858 | batadv_hash_set_lock_class(bat_priv->vis.hash, |
859 | &batadv_vis_hash_lock_class_key); | |
860 | ||
807736f6 SE |
861 | bat_priv->vis.my_info = kmalloc(BATADV_MAX_VIS_PACKET_SIZE, GFP_ATOMIC); |
862 | if (!bat_priv->vis.my_info) | |
c6c8fea2 | 863 | goto err; |
c6c8fea2 | 864 | |
5b246574 SE |
865 | len = sizeof(*packet) + BATADV_MAX_VIS_PACKET_SIZE; |
866 | len += ETH_HLEN + NET_IP_ALIGN; | |
807736f6 SE |
867 | bat_priv->vis.my_info->skb_packet = dev_alloc_skb(len); |
868 | if (!bat_priv->vis.my_info->skb_packet) | |
c6c8fea2 SE |
869 | goto free_info; |
870 | ||
5b246574 | 871 | skb_reserve(bat_priv->vis.my_info->skb_packet, ETH_HLEN + NET_IP_ALIGN); |
807736f6 | 872 | tmp_skb = bat_priv->vis.my_info->skb_packet; |
96412690 | 873 | packet = (struct batadv_vis_packet *)skb_put(tmp_skb, sizeof(*packet)); |
c6c8fea2 SE |
874 | |
875 | /* prefill the vis info */ | |
42d0b044 | 876 | first_seen = jiffies - msecs_to_jiffies(BATADV_VIS_INTERVAL); |
807736f6 SE |
877 | bat_priv->vis.my_info->first_seen = first_seen; |
878 | INIT_LIST_HEAD(&bat_priv->vis.my_info->recv_list); | |
879 | INIT_LIST_HEAD(&bat_priv->vis.my_info->send_list); | |
880 | kref_init(&bat_priv->vis.my_info->refcount); | |
881 | bat_priv->vis.my_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 | 885 | packet->seqno = 0; |
162d549c | 886 | packet->reserved = 0; |
c6c8fea2 SE |
887 | packet->entries = 0; |
888 | ||
807736f6 | 889 | INIT_LIST_HEAD(&bat_priv->vis.send_list); |
c6c8fea2 | 890 | |
807736f6 | 891 | hash_added = batadv_hash_add(bat_priv->vis.hash, batadv_vis_info_cmp, |
eaad8ad9 | 892 | batadv_vis_info_choose, |
807736f6 SE |
893 | bat_priv->vis.my_info, |
894 | &bat_priv->vis.my_info->hash_entry); | |
1a1f37d9 | 895 | if (hash_added != 0) { |
c6c8fea2 SE |
896 | pr_err("Can't add own vis packet into hash\n"); |
897 | /* not in hash, need to remove it manually. */ | |
807736f6 | 898 | kref_put(&bat_priv->vis.my_info->refcount, batadv_free_info); |
c6c8fea2 SE |
899 | goto err; |
900 | } | |
901 | ||
807736f6 | 902 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
72414442 AQ |
903 | |
904 | INIT_DELAYED_WORK(&bat_priv->vis.work, batadv_send_vis_packets); | |
905 | queue_delayed_work(batadv_event_workqueue, &bat_priv->vis.work, | |
906 | msecs_to_jiffies(BATADV_VIS_INTERVAL)); | |
907 | ||
5346c35e | 908 | return 0; |
c6c8fea2 SE |
909 | |
910 | free_info: | |
807736f6 SE |
911 | kfree(bat_priv->vis.my_info); |
912 | bat_priv->vis.my_info = NULL; | |
c6c8fea2 | 913 | err: |
807736f6 | 914 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
d0f714f4 | 915 | batadv_vis_quit(bat_priv); |
5346c35e | 916 | return -ENOMEM; |
c6c8fea2 SE |
917 | } |
918 | ||
919 | /* Decrease the reference count on a hash item info */ | |
eaad8ad9 | 920 | static void batadv_free_info_ref(struct hlist_node *node, void *arg) |
c6c8fea2 | 921 | { |
56303d34 | 922 | struct batadv_vis_info *info; |
c6c8fea2 | 923 | |
56303d34 | 924 | info = container_of(node, struct batadv_vis_info, hash_entry); |
eaad8ad9 SE |
925 | batadv_send_list_del(info); |
926 | kref_put(&info->refcount, batadv_free_info); | |
c6c8fea2 SE |
927 | } |
928 | ||
929 | /* shutdown vis-server */ | |
56303d34 | 930 | void batadv_vis_quit(struct batadv_priv *bat_priv) |
c6c8fea2 | 931 | { |
807736f6 | 932 | if (!bat_priv->vis.hash) |
c6c8fea2 SE |
933 | return; |
934 | ||
807736f6 | 935 | cancel_delayed_work_sync(&bat_priv->vis.work); |
c6c8fea2 | 936 | |
807736f6 | 937 | spin_lock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 | 938 | /* properly remove, kill timers ... */ |
807736f6 SE |
939 | batadv_hash_delete(bat_priv->vis.hash, batadv_free_info_ref, NULL); |
940 | bat_priv->vis.hash = NULL; | |
941 | bat_priv->vis.my_info = NULL; | |
942 | spin_unlock_bh(&bat_priv->vis.hash_lock); | |
c6c8fea2 | 943 | } |