Commit | Line | Data |
---|---|---|
0b873931 | 1 | /* Copyright (C) 2009-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
3 | * Marek Lindner, 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 | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
c6c8fea2 | 18 | #include "main.h" |
785ea114 | 19 | #include "distributed-arp-table.h" |
c6c8fea2 SE |
20 | #include "originator.h" |
21 | #include "hash.h" | |
22 | #include "translation-table.h" | |
23 | #include "routing.h" | |
24 | #include "gateway_client.h" | |
25 | #include "hard-interface.h" | |
c6c8fea2 | 26 | #include "soft-interface.h" |
23721387 | 27 | #include "bridge_loop_avoidance.h" |
d56b1705 | 28 | #include "network-coding.h" |
610bfc6b | 29 | #include "fragmentation.h" |
c6c8fea2 | 30 | |
dec05074 AQ |
31 | /* hash class keys */ |
32 | static struct lock_class_key batadv_orig_hash_lock_class_key; | |
33 | ||
03fc7f86 | 34 | static void batadv_purge_orig(struct work_struct *work); |
c6c8fea2 | 35 | |
b8e2dd13 | 36 | /* returns 1 if they are the same originator */ |
bbad0a5e | 37 | int batadv_compare_orig(const struct hlist_node *node, const void *data2) |
b8e2dd13 | 38 | { |
56303d34 SE |
39 | const void *data1 = container_of(node, struct batadv_orig_node, |
40 | hash_entry); | |
b8e2dd13 | 41 | |
323813ed | 42 | return batadv_compare_eth(data1, data2); |
b8e2dd13 SE |
43 | } |
44 | ||
7ea7b4a1 AQ |
45 | /** |
46 | * batadv_orig_node_vlan_get - get an orig_node_vlan object | |
47 | * @orig_node: the originator serving the VLAN | |
48 | * @vid: the VLAN identifier | |
49 | * | |
50 | * Returns the vlan object identified by vid and belonging to orig_node or NULL | |
51 | * if it does not exist. | |
52 | */ | |
53 | struct batadv_orig_node_vlan * | |
54 | batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, | |
55 | unsigned short vid) | |
56 | { | |
57 | struct batadv_orig_node_vlan *vlan = NULL, *tmp; | |
58 | ||
59 | rcu_read_lock(); | |
60 | list_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) { | |
61 | if (tmp->vid != vid) | |
62 | continue; | |
63 | ||
64 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
65 | continue; | |
66 | ||
67 | vlan = tmp; | |
68 | ||
69 | break; | |
70 | } | |
71 | rcu_read_unlock(); | |
72 | ||
73 | return vlan; | |
74 | } | |
75 | ||
76 | /** | |
77 | * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan | |
78 | * object | |
79 | * @orig_node: the originator serving the VLAN | |
80 | * @vid: the VLAN identifier | |
81 | * | |
82 | * Returns NULL in case of failure or the vlan object identified by vid and | |
83 | * belonging to orig_node otherwise. The object is created and added to the list | |
84 | * if it does not exist. | |
85 | * | |
86 | * The object is returned with refcounter increased by 1. | |
87 | */ | |
88 | struct batadv_orig_node_vlan * | |
89 | batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, | |
90 | unsigned short vid) | |
91 | { | |
92 | struct batadv_orig_node_vlan *vlan; | |
93 | ||
94 | spin_lock_bh(&orig_node->vlan_list_lock); | |
95 | ||
96 | /* first look if an object for this vid already exists */ | |
97 | vlan = batadv_orig_node_vlan_get(orig_node, vid); | |
98 | if (vlan) | |
99 | goto out; | |
100 | ||
101 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
102 | if (!vlan) | |
103 | goto out; | |
104 | ||
105 | atomic_set(&vlan->refcount, 2); | |
106 | vlan->vid = vid; | |
107 | ||
108 | list_add_rcu(&vlan->list, &orig_node->vlan_list); | |
109 | ||
110 | out: | |
111 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
112 | ||
113 | return vlan; | |
114 | } | |
115 | ||
116 | /** | |
117 | * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free | |
118 | * the originator-vlan object | |
119 | * @orig_vlan: the originator-vlan object to release | |
120 | */ | |
121 | void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan) | |
122 | { | |
123 | if (atomic_dec_and_test(&orig_vlan->refcount)) | |
124 | kfree_rcu(orig_vlan, rcu); | |
125 | } | |
126 | ||
56303d34 | 127 | int batadv_originator_init(struct batadv_priv *bat_priv) |
c6c8fea2 SE |
128 | { |
129 | if (bat_priv->orig_hash) | |
5346c35e | 130 | return 0; |
c6c8fea2 | 131 | |
1a8eaf07 | 132 | bat_priv->orig_hash = batadv_hash_new(1024); |
c6c8fea2 SE |
133 | |
134 | if (!bat_priv->orig_hash) | |
135 | goto err; | |
136 | ||
dec05074 AQ |
137 | batadv_hash_set_lock_class(bat_priv->orig_hash, |
138 | &batadv_orig_hash_lock_class_key); | |
139 | ||
72414442 AQ |
140 | INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig); |
141 | queue_delayed_work(batadv_event_workqueue, | |
142 | &bat_priv->orig_work, | |
143 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
144 | ||
5346c35e | 145 | return 0; |
c6c8fea2 SE |
146 | |
147 | err: | |
5346c35e | 148 | return -ENOMEM; |
c6c8fea2 SE |
149 | } |
150 | ||
89652331 SW |
151 | /** |
152 | * batadv_neigh_ifinfo_free_rcu - free the neigh_ifinfo object | |
153 | * @rcu: rcu pointer of the neigh_ifinfo object | |
154 | */ | |
155 | static void batadv_neigh_ifinfo_free_rcu(struct rcu_head *rcu) | |
156 | { | |
157 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
158 | ||
159 | neigh_ifinfo = container_of(rcu, struct batadv_neigh_ifinfo, rcu); | |
160 | ||
161 | if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) | |
162 | batadv_hardif_free_ref_now(neigh_ifinfo->if_outgoing); | |
163 | ||
164 | kfree(neigh_ifinfo); | |
165 | } | |
166 | ||
167 | /** | |
168 | * batadv_neigh_ifinfo_free_now - decrement the refcounter and possibly free | |
169 | * the neigh_ifinfo (without rcu callback) | |
170 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
171 | */ | |
172 | static void | |
173 | batadv_neigh_ifinfo_free_ref_now(struct batadv_neigh_ifinfo *neigh_ifinfo) | |
174 | { | |
175 | if (atomic_dec_and_test(&neigh_ifinfo->refcount)) | |
176 | batadv_neigh_ifinfo_free_rcu(&neigh_ifinfo->rcu); | |
177 | } | |
178 | ||
179 | /** | |
180 | * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly free | |
181 | * the neigh_ifinfo | |
182 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
183 | */ | |
184 | void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo) | |
185 | { | |
186 | if (atomic_dec_and_test(&neigh_ifinfo->refcount)) | |
187 | call_rcu(&neigh_ifinfo->rcu, batadv_neigh_ifinfo_free_rcu); | |
188 | } | |
189 | ||
190 | /** | |
191 | * batadv_neigh_node_free_rcu - free the neigh_node | |
192 | * @rcu: rcu pointer of the neigh_node | |
193 | */ | |
194 | static void batadv_neigh_node_free_rcu(struct rcu_head *rcu) | |
195 | { | |
196 | struct hlist_node *node_tmp; | |
197 | struct batadv_neigh_node *neigh_node; | |
198 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
199 | ||
200 | neigh_node = container_of(rcu, struct batadv_neigh_node, rcu); | |
201 | ||
202 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
203 | &neigh_node->ifinfo_list, list) { | |
204 | batadv_neigh_ifinfo_free_ref_now(neigh_ifinfo); | |
205 | } | |
206 | batadv_hardif_free_ref_now(neigh_node->if_incoming); | |
207 | ||
208 | kfree(neigh_node); | |
209 | } | |
210 | ||
211 | /** | |
212 | * batadv_neigh_node_free_ref_now - decrement the neighbors refcounter | |
213 | * and possibly free it (without rcu callback) | |
214 | * @neigh_node: neigh neighbor to free | |
215 | */ | |
216 | static void | |
217 | batadv_neigh_node_free_ref_now(struct batadv_neigh_node *neigh_node) | |
218 | { | |
219 | if (atomic_dec_and_test(&neigh_node->refcount)) | |
220 | batadv_neigh_node_free_rcu(&neigh_node->rcu); | |
221 | } | |
222 | ||
223 | /** | |
224 | * batadv_neigh_node_free_ref - decrement the neighbors refcounter | |
225 | * and possibly free it | |
226 | * @neigh_node: neigh neighbor to free | |
227 | */ | |
56303d34 | 228 | void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) |
a4c135c5 | 229 | { |
44524fcd | 230 | if (atomic_dec_and_test(&neigh_node->refcount)) |
89652331 | 231 | call_rcu(&neigh_node->rcu, batadv_neigh_node_free_rcu); |
a4c135c5 SW |
232 | } |
233 | ||
e1a5382f | 234 | /* increases the refcounter of a found router */ |
56303d34 SE |
235 | struct batadv_neigh_node * |
236 | batadv_orig_node_get_router(struct batadv_orig_node *orig_node) | |
e1a5382f | 237 | { |
56303d34 | 238 | struct batadv_neigh_node *router; |
e1a5382f LL |
239 | |
240 | rcu_read_lock(); | |
241 | router = rcu_dereference(orig_node->router); | |
242 | ||
243 | if (router && !atomic_inc_not_zero(&router->refcount)) | |
244 | router = NULL; | |
245 | ||
246 | rcu_read_unlock(); | |
247 | return router; | |
248 | } | |
249 | ||
89652331 SW |
250 | /** |
251 | * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node | |
252 | * @neigh_node: the neigh node to be queried | |
253 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
254 | * | |
255 | * The object is returned with refcounter increased by 1. | |
256 | * | |
257 | * Returns the requested neigh_ifinfo or NULL if not found | |
258 | */ | |
259 | struct batadv_neigh_ifinfo * | |
260 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
261 | struct batadv_hard_iface *if_outgoing) | |
262 | { | |
263 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, | |
264 | *tmp_neigh_ifinfo; | |
265 | ||
266 | rcu_read_lock(); | |
267 | hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, | |
268 | list) { | |
269 | if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) | |
270 | continue; | |
271 | ||
272 | if (!atomic_inc_not_zero(&tmp_neigh_ifinfo->refcount)) | |
273 | continue; | |
274 | ||
275 | neigh_ifinfo = tmp_neigh_ifinfo; | |
276 | break; | |
277 | } | |
278 | rcu_read_unlock(); | |
279 | ||
280 | return neigh_ifinfo; | |
281 | } | |
282 | ||
283 | /** | |
284 | * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object | |
285 | * @neigh_node: the neigh node to be queried | |
286 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
287 | * | |
288 | * Returns NULL in case of failure or the neigh_ifinfo object for the | |
289 | * if_outgoing interface otherwise. The object is created and added to the list | |
290 | * if it does not exist. | |
291 | * | |
292 | * The object is returned with refcounter increased by 1. | |
293 | */ | |
294 | struct batadv_neigh_ifinfo * | |
295 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
296 | struct batadv_hard_iface *if_outgoing) | |
297 | { | |
298 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
299 | ||
300 | spin_lock_bh(&neigh->ifinfo_lock); | |
301 | ||
302 | neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); | |
303 | if (neigh_ifinfo) | |
304 | goto out; | |
305 | ||
306 | neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); | |
307 | if (!neigh_ifinfo) | |
308 | goto out; | |
309 | ||
310 | if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
311 | kfree(neigh_ifinfo); | |
312 | neigh_ifinfo = NULL; | |
313 | goto out; | |
314 | } | |
315 | ||
316 | INIT_HLIST_NODE(&neigh_ifinfo->list); | |
317 | atomic_set(&neigh_ifinfo->refcount, 2); | |
318 | neigh_ifinfo->if_outgoing = if_outgoing; | |
319 | ||
320 | hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); | |
321 | ||
322 | out: | |
323 | spin_unlock_bh(&neigh->ifinfo_lock); | |
324 | ||
325 | return neigh_ifinfo; | |
326 | } | |
327 | ||
0538f759 AQ |
328 | /** |
329 | * batadv_neigh_node_new - create and init a new neigh_node object | |
330 | * @hard_iface: the interface where the neighbour is connected to | |
331 | * @neigh_addr: the mac address of the neighbour interface | |
332 | * @orig_node: originator object representing the neighbour | |
333 | * | |
334 | * Allocates a new neigh_node object and initialises all the generic fields. | |
335 | * Returns the new object or NULL on failure. | |
336 | */ | |
56303d34 SE |
337 | struct batadv_neigh_node * |
338 | batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, | |
0538f759 AQ |
339 | const uint8_t *neigh_addr, |
340 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 341 | { |
56303d34 | 342 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 343 | |
704509b8 | 344 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 345 | if (!neigh_node) |
7ae8b285 | 346 | goto out; |
c6c8fea2 | 347 | |
9591a79f | 348 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
349 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
350 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 351 | |
7ae8b285 | 352 | memcpy(neigh_node->addr, neigh_addr, ETH_ALEN); |
0538f759 AQ |
353 | neigh_node->if_incoming = hard_iface; |
354 | neigh_node->orig_node = orig_node; | |
355 | ||
1605d0d6 ML |
356 | /* extra reference for return */ |
357 | atomic_set(&neigh_node->refcount, 2); | |
c6c8fea2 | 358 | |
7ae8b285 | 359 | out: |
c6c8fea2 SE |
360 | return neigh_node; |
361 | } | |
362 | ||
03fc7f86 | 363 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 364 | { |
b67bfe0d | 365 | struct hlist_node *node_tmp; |
f6c8b711 | 366 | struct batadv_neigh_node *neigh_node; |
56303d34 | 367 | struct batadv_orig_node *orig_node; |
16b1aba8 | 368 | |
56303d34 | 369 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); |
c6c8fea2 | 370 | |
f987ed6e ML |
371 | spin_lock_bh(&orig_node->neigh_list_lock); |
372 | ||
c6c8fea2 | 373 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 374 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 375 | &orig_node->neigh_list, list) { |
f987ed6e | 376 | hlist_del_rcu(&neigh_node->list); |
89652331 | 377 | batadv_neigh_node_free_ref_now(neigh_node); |
c6c8fea2 SE |
378 | } |
379 | ||
f987ed6e ML |
380 | spin_unlock_bh(&orig_node->neigh_list_lock); |
381 | ||
d56b1705 MH |
382 | /* Free nc_nodes */ |
383 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
384 | ||
610bfc6b MH |
385 | batadv_frag_purge_orig(orig_node, NULL); |
386 | ||
95fb130d | 387 | batadv_tt_global_del_orig(orig_node->bat_priv, orig_node, -1, |
08c36d3e | 388 | "originator timed out"); |
c6c8fea2 | 389 | |
d0015fdd AQ |
390 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) |
391 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
392 | ||
a73105b8 | 393 | kfree(orig_node->tt_buff); |
c6c8fea2 SE |
394 | kfree(orig_node); |
395 | } | |
396 | ||
72822225 LL |
397 | /** |
398 | * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly | |
399 | * schedule an rcu callback for freeing it | |
400 | * @orig_node: the orig node to free | |
401 | */ | |
56303d34 | 402 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) |
7b36e8ee ML |
403 | { |
404 | if (atomic_dec_and_test(&orig_node->refcount)) | |
03fc7f86 | 405 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
7b36e8ee ML |
406 | } |
407 | ||
72822225 LL |
408 | /** |
409 | * batadv_orig_node_free_ref_now - decrement the orig node refcounter and | |
410 | * possibly free it (without rcu callback) | |
411 | * @orig_node: the orig node to free | |
412 | */ | |
413 | void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node) | |
414 | { | |
415 | if (atomic_dec_and_test(&orig_node->refcount)) | |
416 | batadv_orig_node_free_rcu(&orig_node->rcu); | |
417 | } | |
418 | ||
56303d34 | 419 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 420 | { |
5bf74e9c | 421 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 422 | struct hlist_node *node_tmp; |
16b1aba8 | 423 | struct hlist_head *head; |
16b1aba8 | 424 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 425 | struct batadv_orig_node *orig_node; |
c90681b8 | 426 | uint32_t i; |
16b1aba8 ML |
427 | |
428 | if (!hash) | |
c6c8fea2 SE |
429 | return; |
430 | ||
431 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
432 | ||
c6c8fea2 | 433 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
434 | |
435 | for (i = 0; i < hash->size; i++) { | |
436 | head = &hash->table[i]; | |
437 | list_lock = &hash->list_locks[i]; | |
438 | ||
439 | spin_lock_bh(list_lock); | |
b67bfe0d | 440 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 441 | head, hash_entry) { |
b67bfe0d | 442 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 443 | batadv_orig_node_free_ref(orig_node); |
16b1aba8 ML |
444 | } |
445 | spin_unlock_bh(list_lock); | |
446 | } | |
447 | ||
1a8eaf07 | 448 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
449 | } |
450 | ||
bbad0a5e AQ |
451 | /** |
452 | * batadv_orig_node_new - creates a new orig_node | |
453 | * @bat_priv: the bat priv with all the soft interface information | |
454 | * @addr: the mac address of the originator | |
455 | * | |
456 | * Creates a new originator object and initialise all the generic fields. | |
457 | * The new object is not added to the originator list. | |
458 | * Returns the newly created object or NULL on failure. | |
9cfc7bd6 | 459 | */ |
bbad0a5e | 460 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
56303d34 | 461 | const uint8_t *addr) |
c6c8fea2 | 462 | { |
56303d34 | 463 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 464 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 465 | unsigned long reset_time; |
bbad0a5e | 466 | int i; |
c6c8fea2 | 467 | |
39c75a51 SE |
468 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
469 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 470 | |
704509b8 | 471 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
472 | if (!orig_node) |
473 | return NULL; | |
474 | ||
9591a79f | 475 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
7ea7b4a1 | 476 | INIT_LIST_HEAD(&orig_node->vlan_list); |
f3e0008f | 477 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 478 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 479 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 480 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 481 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 482 | |
d56b1705 MH |
483 | batadv_nc_init_orig(orig_node); |
484 | ||
7b36e8ee ML |
485 | /* extra reference for return */ |
486 | atomic_set(&orig_node->refcount, 2); | |
c6c8fea2 | 487 | |
17071578 | 488 | orig_node->tt_initialised = false; |
16b1aba8 | 489 | orig_node->bat_priv = bat_priv; |
c6c8fea2 | 490 | memcpy(orig_node->orig, addr, ETH_ALEN); |
785ea114 | 491 | batadv_dat_init_orig_node_addr(orig_node); |
c6c8fea2 | 492 | orig_node->router = NULL; |
c8c991bf | 493 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 494 | orig_node->tt_buff = NULL; |
a73105b8 | 495 | orig_node->tt_buff_len = 0; |
42d0b044 SE |
496 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
497 | orig_node->bcast_seqno_reset = reset_time; | |
498 | orig_node->batman_seqno_reset = reset_time; | |
c6c8fea2 | 499 | |
7ea7b4a1 AQ |
500 | /* create a vlan object for the "untagged" LAN */ |
501 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
502 | if (!vlan) | |
503 | goto free_orig_node; | |
504 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
505 | * Immediately release vlan since it is not needed anymore in this | |
506 | * context | |
507 | */ | |
508 | batadv_orig_node_vlan_free_ref(vlan); | |
509 | ||
610bfc6b MH |
510 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
511 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
512 | spin_lock_init(&orig_node->fragments[i].lock); | |
513 | orig_node->fragments[i].size = 0; | |
514 | } | |
515 | ||
c6c8fea2 | 516 | return orig_node; |
c6c8fea2 SE |
517 | free_orig_node: |
518 | kfree(orig_node); | |
519 | return NULL; | |
520 | } | |
521 | ||
89652331 SW |
522 | /** |
523 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
524 | * @bat_priv: the bat priv with all the soft interface information | |
525 | * @orig_node: orig node which is to be checked | |
526 | * | |
527 | * Returns true if any neighbor was purged, false otherwise | |
528 | */ | |
56303d34 SE |
529 | static bool |
530 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 531 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 532 | { |
b67bfe0d | 533 | struct hlist_node *node_tmp; |
56303d34 | 534 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 535 | bool neigh_purged = false; |
0b0094e0 | 536 | unsigned long last_seen; |
56303d34 | 537 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 538 | |
f987ed6e ML |
539 | spin_lock_bh(&orig_node->neigh_list_lock); |
540 | ||
c6c8fea2 | 541 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 542 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 543 | &orig_node->neigh_list, list) { |
1eda58bf SE |
544 | last_seen = neigh_node->last_seen; |
545 | if_incoming = neigh_node->if_incoming; | |
546 | ||
42d0b044 | 547 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
548 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
549 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
550 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
551 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
552 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
553 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 554 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
555 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
556 | orig_node->orig, neigh_node->addr, | |
557 | if_incoming->net_dev->name); | |
c6c8fea2 | 558 | else |
39c75a51 | 559 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
560 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
561 | orig_node->orig, neigh_node->addr, | |
562 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
563 | |
564 | neigh_purged = true; | |
9591a79f | 565 | |
f987ed6e | 566 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 567 | batadv_neigh_node_free_ref(neigh_node); |
c6c8fea2 SE |
568 | } |
569 | } | |
f987ed6e ML |
570 | |
571 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
572 | return neigh_purged; |
573 | } | |
574 | ||
89652331 SW |
575 | /** |
576 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
577 | * @bat_priv: the bat priv with all the soft interface information | |
578 | * @orig_node: orig node which is to be checked | |
579 | * @if_outgoing: the interface for which the metric should be compared | |
580 | * | |
581 | * Returns the current best neighbor, with refcount increased. | |
582 | */ | |
583 | static struct batadv_neigh_node * | |
584 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
585 | struct batadv_orig_node *orig_node, | |
586 | struct batadv_hard_iface *if_outgoing) | |
587 | { | |
588 | struct batadv_neigh_node *best = NULL, *neigh; | |
589 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
590 | ||
591 | rcu_read_lock(); | |
592 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
593 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
594 | best, if_outgoing) <= 0)) | |
595 | continue; | |
596 | ||
597 | if (!atomic_inc_not_zero(&neigh->refcount)) | |
598 | continue; | |
599 | ||
600 | if (best) | |
601 | batadv_neigh_node_free_ref(best); | |
602 | ||
603 | best = neigh; | |
604 | } | |
605 | rcu_read_unlock(); | |
606 | ||
607 | return best; | |
608 | } | |
609 | ||
56303d34 SE |
610 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
611 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 612 | { |
56303d34 | 613 | struct batadv_neigh_node *best_neigh_node; |
c6c8fea2 | 614 | |
42d0b044 SE |
615 | if (batadv_has_timed_out(orig_node->last_seen, |
616 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 617 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
618 | "Originator timeout: originator %pM, last_seen %u\n", |
619 | orig_node->orig, | |
620 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 621 | return true; |
c6c8fea2 | 622 | } |
89652331 SW |
623 | if (!batadv_purge_orig_neighbors(bat_priv, orig_node)) |
624 | return false; | |
625 | ||
626 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, | |
627 | BATADV_IF_DEFAULT); | |
628 | batadv_update_route(bat_priv, orig_node, best_neigh_node); | |
629 | if (best_neigh_node) | |
630 | batadv_neigh_node_free_ref(best_neigh_node); | |
c6c8fea2 SE |
631 | |
632 | return false; | |
633 | } | |
634 | ||
56303d34 | 635 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 636 | { |
5bf74e9c | 637 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 638 | struct hlist_node *node_tmp; |
c6c8fea2 | 639 | struct hlist_head *head; |
fb778ea1 | 640 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 641 | struct batadv_orig_node *orig_node; |
c90681b8 | 642 | uint32_t i; |
c6c8fea2 SE |
643 | |
644 | if (!hash) | |
645 | return; | |
646 | ||
c6c8fea2 SE |
647 | /* for all origins... */ |
648 | for (i = 0; i < hash->size; i++) { | |
649 | head = &hash->table[i]; | |
fb778ea1 | 650 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 651 | |
fb778ea1 | 652 | spin_lock_bh(list_lock); |
b67bfe0d | 653 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 654 | head, hash_entry) { |
03fc7f86 | 655 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 656 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 657 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 658 | batadv_orig_node_free_ref(orig_node); |
fb778ea1 | 659 | continue; |
c6c8fea2 | 660 | } |
610bfc6b MH |
661 | |
662 | batadv_frag_purge_orig(orig_node, | |
663 | batadv_frag_check_entry); | |
c6c8fea2 | 664 | } |
fb778ea1 | 665 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
666 | } |
667 | ||
7cf06bc6 SE |
668 | batadv_gw_node_purge(bat_priv); |
669 | batadv_gw_election(bat_priv); | |
c6c8fea2 SE |
670 | } |
671 | ||
03fc7f86 | 672 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 673 | { |
56303d34 SE |
674 | struct delayed_work *delayed_work; |
675 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 676 | |
56303d34 SE |
677 | delayed_work = container_of(work, struct delayed_work, work); |
678 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 679 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
680 | queue_delayed_work(batadv_event_workqueue, |
681 | &bat_priv->orig_work, | |
682 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
683 | } |
684 | ||
56303d34 | 685 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 686 | { |
03fc7f86 | 687 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
688 | } |
689 | ||
7d211efc | 690 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
691 | { |
692 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 693 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 694 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 695 | |
30da63a6 ML |
696 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
697 | if (!primary_if) | |
737a2a22 | 698 | return 0; |
c6c8fea2 | 699 | |
737a2a22 | 700 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 701 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
702 | primary_if->net_dev->dev_addr, net_dev->name, |
703 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 704 | |
737a2a22 | 705 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 706 | |
737a2a22 AQ |
707 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
708 | seq_puts(seq, | |
709 | "No printing function for this routing protocol\n"); | |
710 | return 0; | |
c6c8fea2 SE |
711 | } |
712 | ||
737a2a22 | 713 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq); |
c6c8fea2 | 714 | |
30da63a6 | 715 | return 0; |
c6c8fea2 SE |
716 | } |
717 | ||
56303d34 SE |
718 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
719 | int max_if_num) | |
c6c8fea2 | 720 | { |
56303d34 | 721 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 722 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 723 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 724 | struct hlist_head *head; |
56303d34 | 725 | struct batadv_orig_node *orig_node; |
c90681b8 AQ |
726 | uint32_t i; |
727 | int ret; | |
c6c8fea2 SE |
728 | |
729 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
730 | * if_num |
731 | */ | |
c6c8fea2 SE |
732 | for (i = 0; i < hash->size; i++) { |
733 | head = &hash->table[i]; | |
734 | ||
fb778ea1 | 735 | rcu_read_lock(); |
b67bfe0d | 736 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
737 | ret = 0; |
738 | if (bao->bat_orig_add_if) | |
739 | ret = bao->bat_orig_add_if(orig_node, | |
740 | max_if_num); | |
5346c35e | 741 | if (ret == -ENOMEM) |
c6c8fea2 SE |
742 | goto err; |
743 | } | |
fb778ea1 | 744 | rcu_read_unlock(); |
c6c8fea2 SE |
745 | } |
746 | ||
c6c8fea2 SE |
747 | return 0; |
748 | ||
749 | err: | |
fb778ea1 | 750 | rcu_read_unlock(); |
c6c8fea2 SE |
751 | return -ENOMEM; |
752 | } | |
753 | ||
56303d34 SE |
754 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
755 | int max_if_num) | |
c6c8fea2 | 756 | { |
56303d34 | 757 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 758 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 759 | struct hlist_head *head; |
56303d34 SE |
760 | struct batadv_hard_iface *hard_iface_tmp; |
761 | struct batadv_orig_node *orig_node; | |
d0015fdd | 762 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
c90681b8 AQ |
763 | uint32_t i; |
764 | int ret; | |
c6c8fea2 SE |
765 | |
766 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
767 | * if_num |
768 | */ | |
c6c8fea2 SE |
769 | for (i = 0; i < hash->size; i++) { |
770 | head = &hash->table[i]; | |
771 | ||
fb778ea1 | 772 | rcu_read_lock(); |
b67bfe0d | 773 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
774 | ret = 0; |
775 | if (bao->bat_orig_del_if) | |
776 | ret = bao->bat_orig_del_if(orig_node, | |
777 | max_if_num, | |
778 | hard_iface->if_num); | |
5346c35e | 779 | if (ret == -ENOMEM) |
c6c8fea2 SE |
780 | goto err; |
781 | } | |
fb778ea1 | 782 | rcu_read_unlock(); |
c6c8fea2 SE |
783 | } |
784 | ||
785 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
786 | rcu_read_lock(); | |
3193e8fd | 787 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 788 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
789 | continue; |
790 | ||
e6c10f43 | 791 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
792 | continue; |
793 | ||
e6c10f43 | 794 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
795 | continue; |
796 | ||
e6c10f43 ML |
797 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
798 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
799 | } |
800 | rcu_read_unlock(); | |
801 | ||
e6c10f43 | 802 | hard_iface->if_num = -1; |
c6c8fea2 SE |
803 | return 0; |
804 | ||
805 | err: | |
fb778ea1 | 806 | rcu_read_unlock(); |
c6c8fea2 SE |
807 | return -ENOMEM; |
808 | } |