Commit | Line | Data |
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0b873931 | 1 | /* Copyright (C) 2008-2013 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 | 99 | struct hlist_head *head; |
56303d34 | 100 | struct batadv_vis_info *vis_info, *vis_info_tmp = NULL; |
c90681b8 | 101 | uint32_t index; |
7aadf889 ML |
102 | |
103 | if (!hash) | |
104 | return NULL; | |
105 | ||
eaad8ad9 | 106 | index = batadv_vis_info_choose(data, hash->size); |
7aadf889 ML |
107 | head = &hash->table[index]; |
108 | ||
109 | rcu_read_lock(); | |
b67bfe0d SL |
110 | hlist_for_each_entry_rcu(vis_info, head, hash_entry) { |
111 | if (!batadv_vis_info_cmp(&vis_info->hash_entry, data)) | |
7aadf889 ML |
112 | continue; |
113 | ||
114 | vis_info_tmp = vis_info; | |
115 | break; | |
116 | } | |
117 | rcu_read_unlock(); | |
118 | ||
119 | return vis_info_tmp; | |
120 | } | |
121 | ||
c6c8fea2 | 122 | /* insert interface to the list of interfaces of one originator, if it |
9cfc7bd6 SE |
123 | * does not already exist in the list |
124 | */ | |
eaad8ad9 SE |
125 | static void batadv_vis_data_insert_interface(const uint8_t *interface, |
126 | struct hlist_head *if_list, | |
127 | bool primary) | |
c6c8fea2 | 128 | { |
015b4ae4 | 129 | struct batadv_vis_if_list_entry *entry; |
c6c8fea2 | 130 | |
b67bfe0d | 131 | hlist_for_each_entry(entry, if_list, list) { |
1eda58bf | 132 | if (batadv_compare_eth(entry->addr, interface)) |
c6c8fea2 SE |
133 | return; |
134 | } | |
135 | ||
015758d0 | 136 | /* it's a new address, add it to the list */ |
c6c8fea2 SE |
137 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); |
138 | if (!entry) | |
139 | return; | |
140 | memcpy(entry->addr, interface, ETH_ALEN); | |
141 | entry->primary = primary; | |
142 | hlist_add_head(&entry->list, if_list); | |
143 | } | |
144 | ||
28afd3c0 SE |
145 | static void batadv_vis_data_read_prim_sec(struct seq_file *seq, |
146 | const struct hlist_head *if_list) | |
c6c8fea2 | 147 | { |
015b4ae4 | 148 | struct batadv_vis_if_list_entry *entry; |
c6c8fea2 | 149 | |
b67bfe0d | 150 | hlist_for_each_entry(entry, if_list, list) { |
c6c8fea2 | 151 | if (entry->primary) |
0c814653 | 152 | seq_puts(seq, "PRIMARY, "); |
c6c8fea2 | 153 | else |
28afd3c0 | 154 | seq_printf(seq, "SEC %pM, ", entry->addr); |
c6c8fea2 | 155 | } |
28afd3c0 SE |
156 | } |
157 | ||
158 | /* read an entry */ | |
56303d34 SE |
159 | static ssize_t |
160 | batadv_vis_data_read_entry(struct seq_file *seq, | |
161 | const struct batadv_vis_info_entry *entry, | |
162 | const uint8_t *src, bool primary) | |
28afd3c0 SE |
163 | { |
164 | if (primary && entry->quality == 0) | |
165 | return seq_printf(seq, "TT %pM, ", entry->dest); | |
166 | else if (batadv_compare_eth(entry->src, src)) | |
167 | return seq_printf(seq, "TQ %pM %d, ", entry->dest, | |
168 | entry->quality); | |
c6c8fea2 | 169 | |
28afd3c0 | 170 | return 0; |
c6c8fea2 SE |
171 | } |
172 | ||
56303d34 SE |
173 | static void |
174 | batadv_vis_data_insert_interfaces(struct hlist_head *list, | |
175 | struct batadv_vis_packet *packet, | |
176 | struct batadv_vis_info_entry *entries) | |
c6c8fea2 | 177 | { |
28afd3c0 SE |
178 | int i; |
179 | ||
180 | for (i = 0; i < packet->entries; i++) { | |
181 | if (entries[i].quality == 0) | |
182 | continue; | |
183 | ||
184 | if (batadv_compare_eth(entries[i].src, packet->vis_orig)) | |
185 | continue; | |
186 | ||
187 | batadv_vis_data_insert_interface(entries[i].src, list, false); | |
188 | } | |
189 | } | |
190 | ||
191 | static void batadv_vis_data_read_entries(struct seq_file *seq, | |
192 | struct hlist_head *list, | |
96412690 | 193 | struct batadv_vis_packet *packet, |
56303d34 | 194 | struct batadv_vis_info_entry *entries) |
28afd3c0 SE |
195 | { |
196 | int i; | |
015b4ae4 | 197 | struct batadv_vis_if_list_entry *entry; |
c6c8fea2 | 198 | |
b67bfe0d | 199 | hlist_for_each_entry(entry, list, list) { |
28afd3c0 SE |
200 | seq_printf(seq, "%pM,", entry->addr); |
201 | ||
202 | for (i = 0; i < packet->entries; i++) | |
203 | batadv_vis_data_read_entry(seq, &entries[i], | |
204 | entry->addr, entry->primary); | |
205 | ||
206 | /* add primary/secondary records */ | |
207 | if (batadv_compare_eth(entry->addr, packet->vis_orig)) | |
208 | batadv_vis_data_read_prim_sec(seq, list); | |
c6c8fea2 | 209 | |
0c814653 | 210 | seq_puts(seq, "\n"); |
28afd3c0 | 211 | } |
c6c8fea2 SE |
212 | } |
213 | ||
28afd3c0 SE |
214 | static void batadv_vis_seq_print_text_bucket(struct seq_file *seq, |
215 | const struct hlist_head *head) | |
c6c8fea2 | 216 | { |
56303d34 | 217 | struct batadv_vis_info *info; |
96412690 | 218 | struct batadv_vis_packet *packet; |
28afd3c0 | 219 | uint8_t *entries_pos; |
56303d34 | 220 | struct batadv_vis_info_entry *entries; |
015b4ae4 | 221 | struct batadv_vis_if_list_entry *entry; |
b67bfe0d | 222 | struct hlist_node *n; |
c6c8fea2 | 223 | |
28afd3c0 SE |
224 | HLIST_HEAD(vis_if_list); |
225 | ||
b67bfe0d | 226 | hlist_for_each_entry_rcu(info, head, hash_entry) { |
96412690 | 227 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
28afd3c0 | 228 | entries_pos = (uint8_t *)packet + sizeof(*packet); |
56303d34 | 229 | entries = (struct batadv_vis_info_entry *)entries_pos; |
28afd3c0 SE |
230 | |
231 | batadv_vis_data_insert_interface(packet->vis_orig, &vis_if_list, | |
232 | true); | |
233 | batadv_vis_data_insert_interfaces(&vis_if_list, packet, | |
234 | entries); | |
235 | batadv_vis_data_read_entries(seq, &vis_if_list, packet, | |
236 | entries); | |
237 | ||
b67bfe0d | 238 | hlist_for_each_entry_safe(entry, n, &vis_if_list, list) { |
28afd3c0 SE |
239 | hlist_del(&entry->list); |
240 | kfree(entry); | |
241 | } | |
242 | } | |
c6c8fea2 SE |
243 | } |
244 | ||
d0f714f4 | 245 | int batadv_vis_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 | 246 | { |
56303d34 | 247 | struct batadv_hard_iface *primary_if; |
c6c8fea2 | 248 | struct hlist_head *head; |
c6c8fea2 | 249 | struct net_device *net_dev = (struct net_device *)seq->private; |
56303d34 | 250 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 251 | struct batadv_hashtable *hash = bat_priv->vis.hash; |
c90681b8 | 252 | uint32_t i; |
28afd3c0 | 253 | int ret = 0; |
c6c8fea2 | 254 | int vis_server = atomic_read(&bat_priv->vis_mode); |
c6c8fea2 | 255 | |
e5d89254 | 256 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
257 | if (!primary_if) |
258 | goto out; | |
259 | ||
acd34afa | 260 | if (vis_server == BATADV_VIS_TYPE_CLIENT_UPDATE) |
32ae9b22 | 261 | goto out; |
c6c8fea2 | 262 | |
807736f6 | 263 | spin_lock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 SE |
264 | for (i = 0; i < hash->size; i++) { |
265 | head = &hash->table[i]; | |
28afd3c0 | 266 | batadv_vis_seq_print_text_bucket(seq, head); |
c6c8fea2 | 267 | } |
807736f6 | 268 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 | 269 | |
32ae9b22 ML |
270 | out: |
271 | if (primary_if) | |
e5d89254 | 272 | batadv_hardif_free_ref(primary_if); |
32ae9b22 | 273 | return ret; |
c6c8fea2 SE |
274 | } |
275 | ||
276 | /* add the info packet to the send list, if it was not | |
9cfc7bd6 SE |
277 | * already linked in. |
278 | */ | |
56303d34 SE |
279 | static void batadv_send_list_add(struct batadv_priv *bat_priv, |
280 | struct batadv_vis_info *info) | |
c6c8fea2 SE |
281 | { |
282 | if (list_empty(&info->send_list)) { | |
283 | kref_get(&info->refcount); | |
807736f6 | 284 | list_add_tail(&info->send_list, &bat_priv->vis.send_list); |
c6c8fea2 SE |
285 | } |
286 | } | |
287 | ||
288 | /* delete the info packet from the send list, if it was | |
9cfc7bd6 SE |
289 | * linked in. |
290 | */ | |
56303d34 | 291 | static void batadv_send_list_del(struct batadv_vis_info *info) |
c6c8fea2 SE |
292 | { |
293 | if (!list_empty(&info->send_list)) { | |
294 | list_del_init(&info->send_list); | |
eaad8ad9 | 295 | kref_put(&info->refcount, batadv_free_info); |
c6c8fea2 SE |
296 | } |
297 | } | |
298 | ||
299 | /* tries to add one entry to the receive list. */ | |
56303d34 | 300 | static void batadv_recv_list_add(struct batadv_priv *bat_priv, |
eaad8ad9 | 301 | struct list_head *recv_list, const char *mac) |
c6c8fea2 | 302 | { |
28500f07 | 303 | struct batadv_vis_recvlist_node *entry; |
c6c8fea2 | 304 | |
704509b8 | 305 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); |
c6c8fea2 SE |
306 | if (!entry) |
307 | return; | |
308 | ||
309 | memcpy(entry->mac, mac, ETH_ALEN); | |
807736f6 | 310 | spin_lock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 | 311 | list_add_tail(&entry->list, recv_list); |
807736f6 | 312 | spin_unlock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 SE |
313 | } |
314 | ||
315 | /* returns 1 if this mac is in the recv_list */ | |
56303d34 | 316 | static int batadv_recv_list_is_in(struct batadv_priv *bat_priv, |
eaad8ad9 SE |
317 | const struct list_head *recv_list, |
318 | const char *mac) | |
c6c8fea2 | 319 | { |
28500f07 | 320 | const struct batadv_vis_recvlist_node *entry; |
c6c8fea2 | 321 | |
807736f6 | 322 | spin_lock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 | 323 | list_for_each_entry(entry, recv_list, list) { |
1eda58bf | 324 | if (batadv_compare_eth(entry->mac, mac)) { |
807736f6 | 325 | spin_unlock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 SE |
326 | return 1; |
327 | } | |
328 | } | |
807736f6 | 329 | spin_unlock_bh(&bat_priv->vis.list_lock); |
c6c8fea2 SE |
330 | return 0; |
331 | } | |
332 | ||
333 | /* try to add the packet to the vis_hash. return NULL if invalid (e.g. too old, | |
334 | * broken.. ). vis hash must be locked outside. is_new is set when the packet | |
9cfc7bd6 SE |
335 | * is newer than old entries in the hash. |
336 | */ | |
56303d34 SE |
337 | static struct batadv_vis_info * |
338 | batadv_add_packet(struct batadv_priv *bat_priv, | |
339 | struct batadv_vis_packet *vis_packet, int vis_info_len, | |
340 | int *is_new, int make_broadcast) | |
c6c8fea2 | 341 | { |
56303d34 | 342 | struct batadv_vis_info *info, *old_info; |
96412690 | 343 | struct batadv_vis_packet *search_packet, *old_packet; |
56303d34 | 344 | struct batadv_vis_info search_elem; |
96412690 SE |
345 | struct batadv_vis_packet *packet; |
346 | struct sk_buff *tmp_skb; | |
c6c8fea2 | 347 | int hash_added; |
96412690 | 348 | size_t len; |
56303d34 | 349 | size_t max_entries; |
c6c8fea2 SE |
350 | |
351 | *is_new = 0; | |
352 | /* sanity check */ | |
807736f6 | 353 | if (!bat_priv->vis.hash) |
c6c8fea2 SE |
354 | return NULL; |
355 | ||
356 | /* see if the packet is already in vis_hash */ | |
704509b8 | 357 | search_elem.skb_packet = dev_alloc_skb(sizeof(*search_packet)); |
c6c8fea2 SE |
358 | if (!search_elem.skb_packet) |
359 | return NULL; | |
96412690 SE |
360 | len = sizeof(*search_packet); |
361 | tmp_skb = search_elem.skb_packet; | |
362 | search_packet = (struct batadv_vis_packet *)skb_put(tmp_skb, len); | |
c6c8fea2 SE |
363 | |
364 | memcpy(search_packet->vis_orig, vis_packet->vis_orig, ETH_ALEN); | |
eaad8ad9 | 365 | old_info = batadv_vis_hash_find(bat_priv, &search_elem); |
c6c8fea2 SE |
366 | kfree_skb(search_elem.skb_packet); |
367 | ||
368 | if (old_info) { | |
96412690 SE |
369 | tmp_skb = old_info->skb_packet; |
370 | old_packet = (struct batadv_vis_packet *)tmp_skb->data; | |
3e34819e SE |
371 | if (!batadv_seq_after(ntohl(vis_packet->seqno), |
372 | ntohl(old_packet->seqno))) { | |
c6c8fea2 | 373 | if (old_packet->seqno == vis_packet->seqno) { |
eaad8ad9 SE |
374 | batadv_recv_list_add(bat_priv, |
375 | &old_info->recv_list, | |
376 | vis_packet->sender_orig); | |
c6c8fea2 SE |
377 | return old_info; |
378 | } else { | |
379 | /* newer packet is already in hash. */ | |
380 | return NULL; | |
381 | } | |
382 | } | |
383 | /* remove old entry */ | |
807736f6 | 384 | batadv_hash_remove(bat_priv->vis.hash, batadv_vis_info_cmp, |
eaad8ad9 SE |
385 | batadv_vis_info_choose, old_info); |
386 | batadv_send_list_del(old_info); | |
387 | kref_put(&old_info->refcount, batadv_free_info); | |
c6c8fea2 SE |
388 | } |
389 | ||
704509b8 | 390 | info = kmalloc(sizeof(*info), GFP_ATOMIC); |
c6c8fea2 SE |
391 | if (!info) |
392 | return NULL; | |
393 | ||
96412690 | 394 | len = sizeof(*packet) + vis_info_len; |
5b246574 | 395 | info->skb_packet = dev_alloc_skb(len + ETH_HLEN + NET_IP_ALIGN); |
c6c8fea2 SE |
396 | if (!info->skb_packet) { |
397 | kfree(info); | |
398 | return NULL; | |
399 | } | |
5b246574 | 400 | skb_reserve(info->skb_packet, ETH_HLEN + NET_IP_ALIGN); |
96412690 | 401 | packet = (struct batadv_vis_packet *)skb_put(info->skb_packet, len); |
c6c8fea2 SE |
402 | |
403 | kref_init(&info->refcount); | |
404 | INIT_LIST_HEAD(&info->send_list); | |
405 | INIT_LIST_HEAD(&info->recv_list); | |
406 | info->first_seen = jiffies; | |
407 | info->bat_priv = bat_priv; | |
96412690 | 408 | memcpy(packet, vis_packet, len); |
c6c8fea2 SE |
409 | |
410 | /* initialize and add new packet. */ | |
411 | *is_new = 1; | |
412 | ||
413 | /* Make it a broadcast packet, if required */ | |
414 | if (make_broadcast) | |
3193e8fd | 415 | memcpy(packet->target_orig, batadv_broadcast_addr, ETH_ALEN); |
c6c8fea2 SE |
416 | |
417 | /* repair if entries is longer than packet. */ | |
56303d34 SE |
418 | max_entries = vis_info_len / sizeof(struct batadv_vis_info_entry); |
419 | if (packet->entries > max_entries) | |
420 | packet->entries = max_entries; | |
c6c8fea2 | 421 | |
eaad8ad9 | 422 | batadv_recv_list_add(bat_priv, &info->recv_list, packet->sender_orig); |
c6c8fea2 SE |
423 | |
424 | /* try to add it */ | |
807736f6 | 425 | hash_added = batadv_hash_add(bat_priv->vis.hash, batadv_vis_info_cmp, |
eaad8ad9 SE |
426 | batadv_vis_info_choose, info, |
427 | &info->hash_entry); | |
1a1f37d9 | 428 | if (hash_added != 0) { |
c6c8fea2 | 429 | /* did not work (for some reason) */ |
eaad8ad9 | 430 | kref_put(&info->refcount, batadv_free_info); |
c6c8fea2 SE |
431 | info = NULL; |
432 | } | |
433 | ||
434 | return info; | |
435 | } | |
436 | ||
437 | /* handle the server sync packet, forward if needed. */ | |
56303d34 | 438 | void batadv_receive_server_sync_packet(struct batadv_priv *bat_priv, |
96412690 | 439 | struct batadv_vis_packet *vis_packet, |
d0f714f4 | 440 | int vis_info_len) |
c6c8fea2 | 441 | { |
56303d34 | 442 | struct batadv_vis_info *info; |
c6c8fea2 SE |
443 | int is_new, make_broadcast; |
444 | int vis_server = atomic_read(&bat_priv->vis_mode); | |
445 | ||
acd34afa | 446 | make_broadcast = (vis_server == BATADV_VIS_TYPE_SERVER_SYNC); |
c6c8fea2 | 447 | |
807736f6 | 448 | spin_lock_bh(&bat_priv->vis.hash_lock); |
eaad8ad9 SE |
449 | info = batadv_add_packet(bat_priv, vis_packet, vis_info_len, |
450 | &is_new, make_broadcast); | |
c6c8fea2 SE |
451 | if (!info) |
452 | goto end; | |
453 | ||
454 | /* only if we are server ourselves and packet is newer than the one in | |
9cfc7bd6 SE |
455 | * hash. |
456 | */ | |
acd34afa | 457 | if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC && is_new) |
eaad8ad9 | 458 | batadv_send_list_add(bat_priv, info); |
c6c8fea2 | 459 | end: |
807736f6 | 460 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 SE |
461 | } |
462 | ||
463 | /* handle an incoming client update packet and schedule forward if needed. */ | |
56303d34 | 464 | void batadv_receive_client_update_packet(struct batadv_priv *bat_priv, |
96412690 | 465 | struct batadv_vis_packet *vis_packet, |
d0f714f4 | 466 | int vis_info_len) |
c6c8fea2 | 467 | { |
56303d34 | 468 | struct batadv_vis_info *info; |
96412690 | 469 | struct batadv_vis_packet *packet; |
c6c8fea2 SE |
470 | int is_new; |
471 | int vis_server = atomic_read(&bat_priv->vis_mode); | |
472 | int are_target = 0; | |
473 | ||
474 | /* clients shall not broadcast. */ | |
475 | if (is_broadcast_ether_addr(vis_packet->target_orig)) | |
476 | return; | |
477 | ||
478 | /* Are we the target for this VIS packet? */ | |
acd34afa | 479 | if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC && |
fe8a93b9 | 480 | batadv_is_my_mac(bat_priv, vis_packet->target_orig)) |
c6c8fea2 SE |
481 | are_target = 1; |
482 | ||
807736f6 | 483 | spin_lock_bh(&bat_priv->vis.hash_lock); |
eaad8ad9 SE |
484 | info = batadv_add_packet(bat_priv, vis_packet, vis_info_len, |
485 | &is_new, are_target); | |
c6c8fea2 SE |
486 | |
487 | if (!info) | |
488 | goto end; | |
489 | /* note that outdated packets will be dropped at this point. */ | |
490 | ||
96412690 | 491 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
492 | |
493 | /* send only if we're the target server or ... */ | |
494 | if (are_target && is_new) { | |
acd34afa | 495 | packet->vis_type = BATADV_VIS_TYPE_SERVER_SYNC; /* upgrade! */ |
eaad8ad9 | 496 | batadv_send_list_add(bat_priv, info); |
c6c8fea2 SE |
497 | |
498 | /* ... we're not the recipient (and thus need to forward). */ | |
fe8a93b9 | 499 | } else if (!batadv_is_my_mac(bat_priv, packet->target_orig)) { |
eaad8ad9 | 500 | batadv_send_list_add(bat_priv, info); |
c6c8fea2 SE |
501 | } |
502 | ||
503 | end: | |
807736f6 | 504 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 SE |
505 | } |
506 | ||
507 | /* Walk the originators and find the VIS server with the best tq. Set the packet | |
508 | * address to its address and return the best_tq. | |
509 | * | |
9cfc7bd6 SE |
510 | * Must be called with the originator hash locked |
511 | */ | |
56303d34 SE |
512 | static int batadv_find_best_vis_server(struct batadv_priv *bat_priv, |
513 | struct batadv_vis_info *info) | |
c6c8fea2 | 514 | { |
5bf74e9c | 515 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
56303d34 | 516 | struct batadv_neigh_node *router; |
c6c8fea2 | 517 | struct hlist_head *head; |
56303d34 | 518 | struct batadv_orig_node *orig_node; |
96412690 | 519 | struct batadv_vis_packet *packet; |
c90681b8 AQ |
520 | int best_tq = -1; |
521 | uint32_t i; | |
c6c8fea2 | 522 | |
96412690 | 523 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
524 | |
525 | for (i = 0; i < hash->size; i++) { | |
526 | head = &hash->table[i]; | |
527 | ||
fb778ea1 | 528 | rcu_read_lock(); |
b67bfe0d | 529 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
7d211efc | 530 | router = batadv_orig_node_get_router(orig_node); |
e1a5382f LL |
531 | if (!router) |
532 | continue; | |
533 | ||
acd34afa | 534 | if ((orig_node->flags & BATADV_VIS_SERVER) && |
e1a5382f LL |
535 | (router->tq_avg > best_tq)) { |
536 | best_tq = router->tq_avg; | |
c6c8fea2 SE |
537 | memcpy(packet->target_orig, orig_node->orig, |
538 | ETH_ALEN); | |
539 | } | |
7d211efc | 540 | batadv_neigh_node_free_ref(router); |
c6c8fea2 | 541 | } |
fb778ea1 | 542 | rcu_read_unlock(); |
c6c8fea2 SE |
543 | } |
544 | ||
545 | return best_tq; | |
546 | } | |
547 | ||
548 | /* Return true if the vis packet is full. */ | |
56303d34 | 549 | static bool batadv_vis_packet_full(const struct batadv_vis_info *info) |
c6c8fea2 | 550 | { |
96412690 | 551 | const struct batadv_vis_packet *packet; |
56303d34 | 552 | size_t num; |
347c80f0 | 553 | |
96412690 | 554 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
56303d34 | 555 | num = BATADV_MAX_VIS_PACKET_SIZE / sizeof(struct batadv_vis_info_entry); |
c6c8fea2 | 556 | |
56303d34 | 557 | if (num < packet->entries + 1) |
c6c8fea2 SE |
558 | return true; |
559 | return false; | |
560 | } | |
561 | ||
562 | /* generates a packet of own vis data, | |
9cfc7bd6 SE |
563 | * returns 0 on success, -1 if no packet could be generated |
564 | */ | |
56303d34 | 565 | static int batadv_generate_vis_packet(struct batadv_priv *bat_priv) |
c6c8fea2 | 566 | { |
5bf74e9c | 567 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 568 | struct hlist_head *head; |
56303d34 SE |
569 | struct batadv_orig_node *orig_node; |
570 | struct batadv_neigh_node *router; | |
807736f6 | 571 | struct batadv_vis_info *info = bat_priv->vis.my_info; |
96412690 | 572 | struct batadv_vis_packet *packet; |
56303d34 SE |
573 | struct batadv_vis_info_entry *entry; |
574 | struct batadv_tt_common_entry *tt_common_entry; | |
c67893d1 | 575 | uint8_t *packet_pos; |
c90681b8 AQ |
576 | int best_tq = -1; |
577 | uint32_t i; | |
c6c8fea2 SE |
578 | |
579 | info->first_seen = jiffies; | |
96412690 | 580 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
581 | packet->vis_type = atomic_read(&bat_priv->vis_mode); |
582 | ||
3193e8fd | 583 | memcpy(packet->target_orig, batadv_broadcast_addr, ETH_ALEN); |
42d0b044 | 584 | packet->header.ttl = BATADV_TTL; |
c6c8fea2 SE |
585 | packet->seqno = htonl(ntohl(packet->seqno) + 1); |
586 | packet->entries = 0; | |
162d549c | 587 | packet->reserved = 0; |
704509b8 | 588 | skb_trim(info->skb_packet, sizeof(*packet)); |
c6c8fea2 | 589 | |
acd34afa | 590 | if (packet->vis_type == BATADV_VIS_TYPE_CLIENT_UPDATE) { |
eaad8ad9 | 591 | best_tq = batadv_find_best_vis_server(bat_priv, info); |
c6c8fea2 | 592 | |
d0072609 | 593 | if (best_tq < 0) |
5346c35e | 594 | return best_tq; |
c6c8fea2 SE |
595 | } |
596 | ||
597 | for (i = 0; i < hash->size; i++) { | |
598 | head = &hash->table[i]; | |
599 | ||
fb778ea1 | 600 | rcu_read_lock(); |
b67bfe0d | 601 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
7d211efc | 602 | router = batadv_orig_node_get_router(orig_node); |
e1a5382f | 603 | if (!router) |
c6c8fea2 SE |
604 | continue; |
605 | ||
1eda58bf | 606 | if (!batadv_compare_eth(router->addr, orig_node->orig)) |
e1a5382f | 607 | goto next; |
c6c8fea2 | 608 | |
e9a4f295 | 609 | if (router->if_incoming->if_status != BATADV_IF_ACTIVE) |
e1a5382f | 610 | goto next; |
c6c8fea2 | 611 | |
e1a5382f LL |
612 | if (router->tq_avg < 1) |
613 | goto next; | |
c6c8fea2 SE |
614 | |
615 | /* fill one entry into buffer. */ | |
c67893d1 SE |
616 | packet_pos = skb_put(info->skb_packet, sizeof(*entry)); |
617 | entry = (struct batadv_vis_info_entry *)packet_pos; | |
c6c8fea2 | 618 | memcpy(entry->src, |
e1a5382f | 619 | router->if_incoming->net_dev->dev_addr, |
c6c8fea2 SE |
620 | ETH_ALEN); |
621 | memcpy(entry->dest, orig_node->orig, ETH_ALEN); | |
e1a5382f | 622 | entry->quality = router->tq_avg; |
c6c8fea2 SE |
623 | packet->entries++; |
624 | ||
e1a5382f | 625 | next: |
7d211efc | 626 | batadv_neigh_node_free_ref(router); |
e1a5382f | 627 | |
eaad8ad9 | 628 | if (batadv_vis_packet_full(info)) |
d0072609 | 629 | goto unlock; |
c6c8fea2 | 630 | } |
fb778ea1 | 631 | rcu_read_unlock(); |
c6c8fea2 SE |
632 | } |
633 | ||
807736f6 | 634 | hash = bat_priv->tt.local_hash; |
c6c8fea2 | 635 | |
c6c8fea2 SE |
636 | for (i = 0; i < hash->size; i++) { |
637 | head = &hash->table[i]; | |
638 | ||
7683fdc1 | 639 | rcu_read_lock(); |
b67bfe0d | 640 | hlist_for_each_entry_rcu(tt_common_entry, head, |
7683fdc1 | 641 | hash_entry) { |
c67893d1 SE |
642 | packet_pos = skb_put(info->skb_packet, sizeof(*entry)); |
643 | entry = (struct batadv_vis_info_entry *)packet_pos; | |
c6c8fea2 | 644 | memset(entry->src, 0, ETH_ALEN); |
48100bac | 645 | memcpy(entry->dest, tt_common_entry->addr, ETH_ALEN); |
2dafb49d | 646 | entry->quality = 0; /* 0 means TT */ |
c6c8fea2 SE |
647 | packet->entries++; |
648 | ||
eaad8ad9 | 649 | if (batadv_vis_packet_full(info)) |
7683fdc1 | 650 | goto unlock; |
c6c8fea2 | 651 | } |
7683fdc1 | 652 | rcu_read_unlock(); |
c6c8fea2 SE |
653 | } |
654 | ||
c6c8fea2 | 655 | return 0; |
d0072609 ML |
656 | |
657 | unlock: | |
658 | rcu_read_unlock(); | |
659 | return 0; | |
c6c8fea2 SE |
660 | } |
661 | ||
662 | /* free old vis packets. Must be called with this vis_hash_lock | |
9cfc7bd6 SE |
663 | * held |
664 | */ | |
56303d34 | 665 | static void batadv_purge_vis_packets(struct batadv_priv *bat_priv) |
c6c8fea2 | 666 | { |
c90681b8 | 667 | uint32_t i; |
807736f6 | 668 | struct batadv_hashtable *hash = bat_priv->vis.hash; |
b67bfe0d | 669 | struct hlist_node *node_tmp; |
c6c8fea2 | 670 | struct hlist_head *head; |
56303d34 | 671 | struct batadv_vis_info *info; |
c6c8fea2 SE |
672 | |
673 | for (i = 0; i < hash->size; i++) { | |
674 | head = &hash->table[i]; | |
675 | ||
b67bfe0d | 676 | hlist_for_each_entry_safe(info, node_tmp, |
7aadf889 | 677 | head, hash_entry) { |
c6c8fea2 | 678 | /* never purge own data. */ |
807736f6 | 679 | if (info == bat_priv->vis.my_info) |
c6c8fea2 SE |
680 | continue; |
681 | ||
1eda58bf | 682 | if (batadv_has_timed_out(info->first_seen, |
edbf7ff7 | 683 | BATADV_VIS_TIMEOUT)) { |
b67bfe0d | 684 | hlist_del(&info->hash_entry); |
eaad8ad9 SE |
685 | batadv_send_list_del(info); |
686 | kref_put(&info->refcount, batadv_free_info); | |
c6c8fea2 SE |
687 | } |
688 | } | |
689 | } | |
690 | } | |
691 | ||
56303d34 SE |
692 | static void batadv_broadcast_vis_packet(struct batadv_priv *bat_priv, |
693 | struct batadv_vis_info *info) | |
c6c8fea2 | 694 | { |
5bf74e9c | 695 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 696 | struct hlist_head *head; |
56303d34 | 697 | struct batadv_orig_node *orig_node; |
96412690 | 698 | struct batadv_vis_packet *packet; |
c6c8fea2 | 699 | struct sk_buff *skb; |
c90681b8 | 700 | uint32_t i; |
c6c8fea2 SE |
701 | |
702 | ||
96412690 | 703 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 SE |
704 | |
705 | /* send to all routers in range. */ | |
706 | for (i = 0; i < hash->size; i++) { | |
707 | head = &hash->table[i]; | |
708 | ||
fb778ea1 | 709 | rcu_read_lock(); |
b67bfe0d | 710 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
c6c8fea2 | 711 | /* if it's a vis server and reachable, send it. */ |
acd34afa | 712 | if (!(orig_node->flags & BATADV_VIS_SERVER)) |
c6c8fea2 | 713 | continue; |
e1a5382f | 714 | |
c6c8fea2 | 715 | /* don't send it if we already received the packet from |
9cfc7bd6 SE |
716 | * this node. |
717 | */ | |
eaad8ad9 | 718 | if (batadv_recv_list_is_in(bat_priv, &info->recv_list, |
bb351ba0 | 719 | orig_node->orig)) |
c6c8fea2 SE |
720 | continue; |
721 | ||
722 | memcpy(packet->target_orig, orig_node->orig, ETH_ALEN); | |
c6c8fea2 | 723 | skb = skb_clone(info->skb_packet, GFP_ATOMIC); |
bb351ba0 MH |
724 | if (!skb) |
725 | continue; | |
c6c8fea2 | 726 | |
bb351ba0 MH |
727 | if (!batadv_send_skb_to_orig(skb, orig_node, NULL)) |
728 | kfree_skb(skb); | |
c6c8fea2 | 729 | } |
fb778ea1 | 730 | rcu_read_unlock(); |
c6c8fea2 | 731 | } |
c6c8fea2 SE |
732 | } |
733 | ||
56303d34 SE |
734 | static void batadv_unicast_vis_packet(struct batadv_priv *bat_priv, |
735 | struct batadv_vis_info *info) | |
c6c8fea2 | 736 | { |
56303d34 | 737 | struct batadv_orig_node *orig_node; |
c6c8fea2 | 738 | struct sk_buff *skb; |
96412690 | 739 | struct batadv_vis_packet *packet; |
c6c8fea2 | 740 | |
96412690 | 741 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
c6c8fea2 | 742 | |
da641193 | 743 | orig_node = batadv_orig_hash_find(bat_priv, packet->target_orig); |
44524fcd | 744 | if (!orig_node) |
e1a5382f | 745 | goto out; |
44524fcd | 746 | |
bb351ba0 MH |
747 | skb = skb_clone(info->skb_packet, GFP_ATOMIC); |
748 | if (!skb) | |
e1a5382f | 749 | goto out; |
c6c8fea2 | 750 | |
bb351ba0 MH |
751 | if (!batadv_send_skb_to_orig(skb, orig_node, NULL)) |
752 | kfree_skb(skb); | |
c6c8fea2 SE |
753 | |
754 | out: | |
44524fcd | 755 | if (orig_node) |
7d211efc | 756 | batadv_orig_node_free_ref(orig_node); |
c6c8fea2 SE |
757 | } |
758 | ||
eaad8ad9 | 759 | /* only send one vis packet. called from batadv_send_vis_packets() */ |
56303d34 SE |
760 | static void batadv_send_vis_packet(struct batadv_priv *bat_priv, |
761 | struct batadv_vis_info *info) | |
c6c8fea2 | 762 | { |
56303d34 | 763 | struct batadv_hard_iface *primary_if; |
96412690 | 764 | struct batadv_vis_packet *packet; |
c6c8fea2 | 765 | |
e5d89254 | 766 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 ML |
767 | if (!primary_if) |
768 | goto out; | |
769 | ||
96412690 | 770 | packet = (struct batadv_vis_packet *)info->skb_packet->data; |
76543d14 | 771 | if (packet->header.ttl < 2) { |
c6c8fea2 | 772 | pr_debug("Error - can't send vis packet: ttl exceeded\n"); |
32ae9b22 | 773 | goto out; |
c6c8fea2 SE |
774 | } |
775 | ||
32ae9b22 | 776 | memcpy(packet->sender_orig, primary_if->net_dev->dev_addr, ETH_ALEN); |
76543d14 | 777 | packet->header.ttl--; |
c6c8fea2 SE |
778 | |
779 | if (is_broadcast_ether_addr(packet->target_orig)) | |
eaad8ad9 | 780 | batadv_broadcast_vis_packet(bat_priv, info); |
c6c8fea2 | 781 | else |
eaad8ad9 | 782 | batadv_unicast_vis_packet(bat_priv, info); |
76543d14 | 783 | packet->header.ttl++; /* restore TTL */ |
32ae9b22 ML |
784 | |
785 | out: | |
786 | if (primary_if) | |
e5d89254 | 787 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 SE |
788 | } |
789 | ||
790 | /* called from timer; send (and maybe generate) vis packet. */ | |
eaad8ad9 | 791 | static void batadv_send_vis_packets(struct work_struct *work) |
c6c8fea2 | 792 | { |
bbb1f90e | 793 | struct delayed_work *delayed_work; |
56303d34 | 794 | struct batadv_priv *bat_priv; |
807736f6 | 795 | struct batadv_priv_vis *priv_vis; |
56303d34 | 796 | struct batadv_vis_info *info; |
c6c8fea2 | 797 | |
bbb1f90e | 798 | delayed_work = container_of(work, struct delayed_work, work); |
807736f6 SE |
799 | priv_vis = container_of(delayed_work, struct batadv_priv_vis, work); |
800 | bat_priv = container_of(priv_vis, struct batadv_priv, vis); | |
801 | spin_lock_bh(&bat_priv->vis.hash_lock); | |
eaad8ad9 | 802 | batadv_purge_vis_packets(bat_priv); |
c6c8fea2 | 803 | |
eaad8ad9 | 804 | if (batadv_generate_vis_packet(bat_priv) == 0) { |
c6c8fea2 | 805 | /* schedule if generation was successful */ |
807736f6 | 806 | batadv_send_list_add(bat_priv, bat_priv->vis.my_info); |
c6c8fea2 SE |
807 | } |
808 | ||
807736f6 SE |
809 | while (!list_empty(&bat_priv->vis.send_list)) { |
810 | info = list_first_entry(&bat_priv->vis.send_list, | |
1181e1da | 811 | typeof(*info), send_list); |
c6c8fea2 SE |
812 | |
813 | kref_get(&info->refcount); | |
807736f6 | 814 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 | 815 | |
eaad8ad9 | 816 | batadv_send_vis_packet(bat_priv, info); |
c6c8fea2 | 817 | |
807736f6 | 818 | spin_lock_bh(&bat_priv->vis.hash_lock); |
eaad8ad9 SE |
819 | batadv_send_list_del(info); |
820 | kref_put(&info->refcount, batadv_free_info); | |
c6c8fea2 | 821 | } |
807736f6 | 822 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
72414442 AQ |
823 | |
824 | queue_delayed_work(batadv_event_workqueue, &bat_priv->vis.work, | |
825 | msecs_to_jiffies(BATADV_VIS_INTERVAL)); | |
c6c8fea2 SE |
826 | } |
827 | ||
828 | /* init the vis server. this may only be called when if_list is already | |
9cfc7bd6 SE |
829 | * initialized (e.g. bat0 is initialized, interfaces have been added) |
830 | */ | |
56303d34 | 831 | int batadv_vis_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 832 | { |
96412690 | 833 | struct batadv_vis_packet *packet; |
c6c8fea2 | 834 | int hash_added; |
347c80f0 | 835 | unsigned int len; |
42d0b044 | 836 | unsigned long first_seen; |
96412690 | 837 | struct sk_buff *tmp_skb; |
c6c8fea2 | 838 | |
807736f6 | 839 | if (bat_priv->vis.hash) |
5346c35e | 840 | return 0; |
c6c8fea2 | 841 | |
807736f6 | 842 | spin_lock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 | 843 | |
807736f6 SE |
844 | bat_priv->vis.hash = batadv_hash_new(256); |
845 | if (!bat_priv->vis.hash) { | |
c6c8fea2 SE |
846 | pr_err("Can't initialize vis_hash\n"); |
847 | goto err; | |
848 | } | |
849 | ||
dec05074 AQ |
850 | batadv_hash_set_lock_class(bat_priv->vis.hash, |
851 | &batadv_vis_hash_lock_class_key); | |
852 | ||
807736f6 SE |
853 | bat_priv->vis.my_info = kmalloc(BATADV_MAX_VIS_PACKET_SIZE, GFP_ATOMIC); |
854 | if (!bat_priv->vis.my_info) | |
c6c8fea2 | 855 | goto err; |
c6c8fea2 | 856 | |
5b246574 SE |
857 | len = sizeof(*packet) + BATADV_MAX_VIS_PACKET_SIZE; |
858 | len += ETH_HLEN + NET_IP_ALIGN; | |
807736f6 SE |
859 | bat_priv->vis.my_info->skb_packet = dev_alloc_skb(len); |
860 | if (!bat_priv->vis.my_info->skb_packet) | |
c6c8fea2 SE |
861 | goto free_info; |
862 | ||
5b246574 | 863 | skb_reserve(bat_priv->vis.my_info->skb_packet, ETH_HLEN + NET_IP_ALIGN); |
807736f6 | 864 | tmp_skb = bat_priv->vis.my_info->skb_packet; |
96412690 | 865 | packet = (struct batadv_vis_packet *)skb_put(tmp_skb, sizeof(*packet)); |
c6c8fea2 SE |
866 | |
867 | /* prefill the vis info */ | |
42d0b044 | 868 | first_seen = jiffies - msecs_to_jiffies(BATADV_VIS_INTERVAL); |
807736f6 SE |
869 | bat_priv->vis.my_info->first_seen = first_seen; |
870 | INIT_LIST_HEAD(&bat_priv->vis.my_info->recv_list); | |
871 | INIT_LIST_HEAD(&bat_priv->vis.my_info->send_list); | |
872 | kref_init(&bat_priv->vis.my_info->refcount); | |
873 | bat_priv->vis.my_info->bat_priv = bat_priv; | |
7e071c79 | 874 | packet->header.version = BATADV_COMPAT_VERSION; |
acd34afa | 875 | packet->header.packet_type = BATADV_VIS; |
42d0b044 | 876 | packet->header.ttl = BATADV_TTL; |
c6c8fea2 | 877 | packet->seqno = 0; |
162d549c | 878 | packet->reserved = 0; |
c6c8fea2 SE |
879 | packet->entries = 0; |
880 | ||
807736f6 | 881 | INIT_LIST_HEAD(&bat_priv->vis.send_list); |
c6c8fea2 | 882 | |
807736f6 | 883 | hash_added = batadv_hash_add(bat_priv->vis.hash, batadv_vis_info_cmp, |
eaad8ad9 | 884 | batadv_vis_info_choose, |
807736f6 SE |
885 | bat_priv->vis.my_info, |
886 | &bat_priv->vis.my_info->hash_entry); | |
1a1f37d9 | 887 | if (hash_added != 0) { |
c6c8fea2 SE |
888 | pr_err("Can't add own vis packet into hash\n"); |
889 | /* not in hash, need to remove it manually. */ | |
807736f6 | 890 | kref_put(&bat_priv->vis.my_info->refcount, batadv_free_info); |
c6c8fea2 SE |
891 | goto err; |
892 | } | |
893 | ||
807736f6 | 894 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
72414442 AQ |
895 | |
896 | INIT_DELAYED_WORK(&bat_priv->vis.work, batadv_send_vis_packets); | |
897 | queue_delayed_work(batadv_event_workqueue, &bat_priv->vis.work, | |
898 | msecs_to_jiffies(BATADV_VIS_INTERVAL)); | |
899 | ||
5346c35e | 900 | return 0; |
c6c8fea2 SE |
901 | |
902 | free_info: | |
807736f6 SE |
903 | kfree(bat_priv->vis.my_info); |
904 | bat_priv->vis.my_info = NULL; | |
c6c8fea2 | 905 | err: |
807736f6 | 906 | spin_unlock_bh(&bat_priv->vis.hash_lock); |
d0f714f4 | 907 | batadv_vis_quit(bat_priv); |
5346c35e | 908 | return -ENOMEM; |
c6c8fea2 SE |
909 | } |
910 | ||
911 | /* Decrease the reference count on a hash item info */ | |
eaad8ad9 | 912 | static void batadv_free_info_ref(struct hlist_node *node, void *arg) |
c6c8fea2 | 913 | { |
56303d34 | 914 | struct batadv_vis_info *info; |
c6c8fea2 | 915 | |
56303d34 | 916 | info = container_of(node, struct batadv_vis_info, hash_entry); |
eaad8ad9 SE |
917 | batadv_send_list_del(info); |
918 | kref_put(&info->refcount, batadv_free_info); | |
c6c8fea2 SE |
919 | } |
920 | ||
921 | /* shutdown vis-server */ | |
56303d34 | 922 | void batadv_vis_quit(struct batadv_priv *bat_priv) |
c6c8fea2 | 923 | { |
807736f6 | 924 | if (!bat_priv->vis.hash) |
c6c8fea2 SE |
925 | return; |
926 | ||
807736f6 | 927 | cancel_delayed_work_sync(&bat_priv->vis.work); |
c6c8fea2 | 928 | |
807736f6 | 929 | spin_lock_bh(&bat_priv->vis.hash_lock); |
c6c8fea2 | 930 | /* properly remove, kill timers ... */ |
807736f6 SE |
931 | batadv_hash_delete(bat_priv->vis.hash, batadv_free_info_ref, NULL); |
932 | bat_priv->vis.hash = NULL; | |
933 | bat_priv->vis.my_info = NULL; | |
934 | spin_unlock_bh(&bat_priv->vis.hash_lock); | |
c6c8fea2 | 935 | } |