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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 | ||
7351a482 SW |
234 | /** |
235 | * batadv_orig_node_get_router - router to the originator depending on iface | |
236 | * @orig_node: the orig node for the router | |
237 | * @if_outgoing: the interface where the payload packet has been received or | |
238 | * the OGM should be sent to | |
239 | * | |
240 | * Returns the neighbor which should be router for this orig_node/iface. | |
241 | * | |
242 | * The object is returned with refcounter increased by 1. | |
243 | */ | |
56303d34 | 244 | struct batadv_neigh_node * |
7351a482 SW |
245 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
246 | const struct batadv_hard_iface *if_outgoing) | |
e1a5382f | 247 | { |
7351a482 SW |
248 | struct batadv_orig_ifinfo *orig_ifinfo; |
249 | struct batadv_neigh_node *router = NULL; | |
e1a5382f LL |
250 | |
251 | rcu_read_lock(); | |
7351a482 SW |
252 | hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { |
253 | if (orig_ifinfo->if_outgoing != if_outgoing) | |
254 | continue; | |
255 | ||
256 | router = rcu_dereference(orig_ifinfo->router); | |
257 | break; | |
258 | } | |
e1a5382f LL |
259 | |
260 | if (router && !atomic_inc_not_zero(&router->refcount)) | |
261 | router = NULL; | |
262 | ||
263 | rcu_read_unlock(); | |
264 | return router; | |
265 | } | |
266 | ||
7351a482 SW |
267 | /** |
268 | * batadv_orig_ifinfo_get - find the ifinfo from an orig_node | |
269 | * @orig_node: the orig node to be queried | |
270 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
271 | * | |
272 | * Returns the requested orig_ifinfo or NULL if not found. | |
273 | * | |
274 | * The object is returned with refcounter increased by 1. | |
275 | */ | |
276 | struct batadv_orig_ifinfo * | |
277 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
278 | struct batadv_hard_iface *if_outgoing) | |
279 | { | |
280 | struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; | |
281 | ||
282 | rcu_read_lock(); | |
283 | hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, | |
284 | list) { | |
285 | if (tmp->if_outgoing != if_outgoing) | |
286 | continue; | |
287 | ||
288 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
289 | continue; | |
290 | ||
291 | orig_ifinfo = tmp; | |
292 | break; | |
293 | } | |
294 | rcu_read_unlock(); | |
295 | ||
296 | return orig_ifinfo; | |
297 | } | |
298 | ||
299 | /** | |
300 | * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object | |
301 | * @orig_node: the orig node to be queried | |
302 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
303 | * | |
304 | * Returns NULL in case of failure or the orig_ifinfo object for the if_outgoing | |
305 | * interface otherwise. The object is created and added to the list | |
306 | * if it does not exist. | |
307 | * | |
308 | * The object is returned with refcounter increased by 1. | |
309 | */ | |
310 | struct batadv_orig_ifinfo * | |
311 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
312 | struct batadv_hard_iface *if_outgoing) | |
313 | { | |
314 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; | |
315 | unsigned long reset_time; | |
316 | ||
317 | spin_lock_bh(&orig_node->neigh_list_lock); | |
318 | ||
319 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
320 | if (orig_ifinfo) | |
321 | goto out; | |
322 | ||
323 | orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); | |
324 | if (!orig_ifinfo) | |
325 | goto out; | |
326 | ||
327 | if (if_outgoing != BATADV_IF_DEFAULT && | |
328 | !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
329 | kfree(orig_ifinfo); | |
330 | orig_ifinfo = NULL; | |
331 | goto out; | |
332 | } | |
333 | ||
334 | reset_time = jiffies - 1; | |
335 | reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); | |
336 | orig_ifinfo->batman_seqno_reset = reset_time; | |
337 | orig_ifinfo->if_outgoing = if_outgoing; | |
338 | INIT_HLIST_NODE(&orig_ifinfo->list); | |
339 | atomic_set(&orig_ifinfo->refcount, 2); | |
340 | hlist_add_head_rcu(&orig_ifinfo->list, | |
341 | &orig_node->ifinfo_list); | |
342 | out: | |
343 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
344 | return orig_ifinfo; | |
345 | } | |
346 | ||
89652331 SW |
347 | /** |
348 | * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node | |
349 | * @neigh_node: the neigh node to be queried | |
350 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
351 | * | |
352 | * The object is returned with refcounter increased by 1. | |
353 | * | |
354 | * Returns the requested neigh_ifinfo or NULL if not found | |
355 | */ | |
356 | struct batadv_neigh_ifinfo * | |
357 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
358 | struct batadv_hard_iface *if_outgoing) | |
359 | { | |
360 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, | |
361 | *tmp_neigh_ifinfo; | |
362 | ||
363 | rcu_read_lock(); | |
364 | hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, | |
365 | list) { | |
366 | if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) | |
367 | continue; | |
368 | ||
369 | if (!atomic_inc_not_zero(&tmp_neigh_ifinfo->refcount)) | |
370 | continue; | |
371 | ||
372 | neigh_ifinfo = tmp_neigh_ifinfo; | |
373 | break; | |
374 | } | |
375 | rcu_read_unlock(); | |
376 | ||
377 | return neigh_ifinfo; | |
378 | } | |
379 | ||
380 | /** | |
381 | * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object | |
382 | * @neigh_node: the neigh node to be queried | |
383 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
384 | * | |
385 | * Returns NULL in case of failure or the neigh_ifinfo object for the | |
386 | * if_outgoing interface otherwise. The object is created and added to the list | |
387 | * if it does not exist. | |
388 | * | |
389 | * The object is returned with refcounter increased by 1. | |
390 | */ | |
391 | struct batadv_neigh_ifinfo * | |
392 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
393 | struct batadv_hard_iface *if_outgoing) | |
394 | { | |
395 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
396 | ||
397 | spin_lock_bh(&neigh->ifinfo_lock); | |
398 | ||
399 | neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); | |
400 | if (neigh_ifinfo) | |
401 | goto out; | |
402 | ||
403 | neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); | |
404 | if (!neigh_ifinfo) | |
405 | goto out; | |
406 | ||
407 | if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
408 | kfree(neigh_ifinfo); | |
409 | neigh_ifinfo = NULL; | |
410 | goto out; | |
411 | } | |
412 | ||
413 | INIT_HLIST_NODE(&neigh_ifinfo->list); | |
414 | atomic_set(&neigh_ifinfo->refcount, 2); | |
415 | neigh_ifinfo->if_outgoing = if_outgoing; | |
416 | ||
417 | hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); | |
418 | ||
419 | out: | |
420 | spin_unlock_bh(&neigh->ifinfo_lock); | |
421 | ||
422 | return neigh_ifinfo; | |
423 | } | |
424 | ||
0538f759 AQ |
425 | /** |
426 | * batadv_neigh_node_new - create and init a new neigh_node object | |
427 | * @hard_iface: the interface where the neighbour is connected to | |
428 | * @neigh_addr: the mac address of the neighbour interface | |
429 | * @orig_node: originator object representing the neighbour | |
430 | * | |
431 | * Allocates a new neigh_node object and initialises all the generic fields. | |
432 | * Returns the new object or NULL on failure. | |
433 | */ | |
56303d34 SE |
434 | struct batadv_neigh_node * |
435 | batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, | |
0538f759 AQ |
436 | const uint8_t *neigh_addr, |
437 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 438 | { |
56303d34 | 439 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 440 | |
704509b8 | 441 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 442 | if (!neigh_node) |
7ae8b285 | 443 | goto out; |
c6c8fea2 | 444 | |
9591a79f | 445 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
446 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
447 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 448 | |
7ae8b285 | 449 | memcpy(neigh_node->addr, neigh_addr, ETH_ALEN); |
0538f759 AQ |
450 | neigh_node->if_incoming = hard_iface; |
451 | neigh_node->orig_node = orig_node; | |
452 | ||
1605d0d6 ML |
453 | /* extra reference for return */ |
454 | atomic_set(&neigh_node->refcount, 2); | |
c6c8fea2 | 455 | |
7ae8b285 | 456 | out: |
c6c8fea2 SE |
457 | return neigh_node; |
458 | } | |
459 | ||
7351a482 SW |
460 | /** |
461 | * batadv_orig_ifinfo_free_rcu - free the orig_ifinfo object | |
462 | * @rcu: rcu pointer of the orig_ifinfo object | |
463 | */ | |
464 | static void batadv_orig_ifinfo_free_rcu(struct rcu_head *rcu) | |
465 | { | |
466 | struct batadv_orig_ifinfo *orig_ifinfo; | |
467 | ||
468 | orig_ifinfo = container_of(rcu, struct batadv_orig_ifinfo, rcu); | |
469 | ||
470 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) | |
471 | batadv_hardif_free_ref_now(orig_ifinfo->if_outgoing); | |
472 | ||
473 | kfree(orig_ifinfo); | |
474 | } | |
475 | ||
476 | /** | |
477 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free | |
478 | * the orig_ifinfo (without rcu callback) | |
479 | * @orig_ifinfo: the orig_ifinfo object to release | |
480 | */ | |
481 | static void | |
482 | batadv_orig_ifinfo_free_ref_now(struct batadv_orig_ifinfo *orig_ifinfo) | |
483 | { | |
484 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
485 | batadv_orig_ifinfo_free_rcu(&orig_ifinfo->rcu); | |
486 | } | |
487 | ||
488 | /** | |
489 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free | |
490 | * the orig_ifinfo | |
491 | * @orig_ifinfo: the orig_ifinfo object to release | |
492 | */ | |
493 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) | |
494 | { | |
495 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
496 | call_rcu(&orig_ifinfo->rcu, batadv_orig_ifinfo_free_rcu); | |
497 | } | |
498 | ||
03fc7f86 | 499 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 500 | { |
b67bfe0d | 501 | struct hlist_node *node_tmp; |
f6c8b711 | 502 | struct batadv_neigh_node *neigh_node; |
56303d34 | 503 | struct batadv_orig_node *orig_node; |
7351a482 | 504 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 505 | |
56303d34 | 506 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); |
c6c8fea2 | 507 | |
f987ed6e ML |
508 | spin_lock_bh(&orig_node->neigh_list_lock); |
509 | ||
c6c8fea2 | 510 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 511 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 512 | &orig_node->neigh_list, list) { |
f987ed6e | 513 | hlist_del_rcu(&neigh_node->list); |
89652331 | 514 | batadv_neigh_node_free_ref_now(neigh_node); |
c6c8fea2 SE |
515 | } |
516 | ||
7351a482 SW |
517 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
518 | &orig_node->ifinfo_list, list) { | |
519 | hlist_del_rcu(&orig_ifinfo->list); | |
520 | batadv_orig_ifinfo_free_ref_now(orig_ifinfo); | |
521 | } | |
f987ed6e ML |
522 | spin_unlock_bh(&orig_node->neigh_list_lock); |
523 | ||
d56b1705 MH |
524 | /* Free nc_nodes */ |
525 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
526 | ||
610bfc6b MH |
527 | batadv_frag_purge_orig(orig_node, NULL); |
528 | ||
95fb130d | 529 | batadv_tt_global_del_orig(orig_node->bat_priv, orig_node, -1, |
08c36d3e | 530 | "originator timed out"); |
c6c8fea2 | 531 | |
d0015fdd AQ |
532 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) |
533 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
534 | ||
a73105b8 | 535 | kfree(orig_node->tt_buff); |
c6c8fea2 SE |
536 | kfree(orig_node); |
537 | } | |
538 | ||
72822225 LL |
539 | /** |
540 | * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly | |
541 | * schedule an rcu callback for freeing it | |
542 | * @orig_node: the orig node to free | |
543 | */ | |
56303d34 | 544 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) |
7b36e8ee ML |
545 | { |
546 | if (atomic_dec_and_test(&orig_node->refcount)) | |
03fc7f86 | 547 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
7b36e8ee ML |
548 | } |
549 | ||
72822225 LL |
550 | /** |
551 | * batadv_orig_node_free_ref_now - decrement the orig node refcounter and | |
552 | * possibly free it (without rcu callback) | |
553 | * @orig_node: the orig node to free | |
554 | */ | |
555 | void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node) | |
556 | { | |
557 | if (atomic_dec_and_test(&orig_node->refcount)) | |
558 | batadv_orig_node_free_rcu(&orig_node->rcu); | |
559 | } | |
560 | ||
56303d34 | 561 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 562 | { |
5bf74e9c | 563 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 564 | struct hlist_node *node_tmp; |
16b1aba8 | 565 | struct hlist_head *head; |
16b1aba8 | 566 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 567 | struct batadv_orig_node *orig_node; |
c90681b8 | 568 | uint32_t i; |
16b1aba8 ML |
569 | |
570 | if (!hash) | |
c6c8fea2 SE |
571 | return; |
572 | ||
573 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
574 | ||
c6c8fea2 | 575 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
576 | |
577 | for (i = 0; i < hash->size; i++) { | |
578 | head = &hash->table[i]; | |
579 | list_lock = &hash->list_locks[i]; | |
580 | ||
581 | spin_lock_bh(list_lock); | |
b67bfe0d | 582 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 583 | head, hash_entry) { |
b67bfe0d | 584 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 585 | batadv_orig_node_free_ref(orig_node); |
16b1aba8 ML |
586 | } |
587 | spin_unlock_bh(list_lock); | |
588 | } | |
589 | ||
1a8eaf07 | 590 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
591 | } |
592 | ||
bbad0a5e AQ |
593 | /** |
594 | * batadv_orig_node_new - creates a new orig_node | |
595 | * @bat_priv: the bat priv with all the soft interface information | |
596 | * @addr: the mac address of the originator | |
597 | * | |
598 | * Creates a new originator object and initialise all the generic fields. | |
599 | * The new object is not added to the originator list. | |
600 | * Returns the newly created object or NULL on failure. | |
9cfc7bd6 | 601 | */ |
bbad0a5e | 602 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
56303d34 | 603 | const uint8_t *addr) |
c6c8fea2 | 604 | { |
56303d34 | 605 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 606 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 607 | unsigned long reset_time; |
bbad0a5e | 608 | int i; |
c6c8fea2 | 609 | |
39c75a51 SE |
610 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
611 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 612 | |
704509b8 | 613 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
614 | if (!orig_node) |
615 | return NULL; | |
616 | ||
9591a79f | 617 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
7ea7b4a1 | 618 | INIT_LIST_HEAD(&orig_node->vlan_list); |
7351a482 | 619 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 620 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 621 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 622 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 623 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 624 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 625 | |
d56b1705 MH |
626 | batadv_nc_init_orig(orig_node); |
627 | ||
7b36e8ee ML |
628 | /* extra reference for return */ |
629 | atomic_set(&orig_node->refcount, 2); | |
c6c8fea2 | 630 | |
17071578 | 631 | orig_node->tt_initialised = false; |
16b1aba8 | 632 | orig_node->bat_priv = bat_priv; |
c6c8fea2 | 633 | memcpy(orig_node->orig, addr, ETH_ALEN); |
785ea114 | 634 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 635 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 636 | orig_node->tt_buff = NULL; |
a73105b8 | 637 | orig_node->tt_buff_len = 0; |
42d0b044 SE |
638 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
639 | orig_node->bcast_seqno_reset = reset_time; | |
c6c8fea2 | 640 | |
7ea7b4a1 AQ |
641 | /* create a vlan object for the "untagged" LAN */ |
642 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
643 | if (!vlan) | |
644 | goto free_orig_node; | |
645 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
646 | * Immediately release vlan since it is not needed anymore in this | |
647 | * context | |
648 | */ | |
649 | batadv_orig_node_vlan_free_ref(vlan); | |
650 | ||
610bfc6b MH |
651 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
652 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
653 | spin_lock_init(&orig_node->fragments[i].lock); | |
654 | orig_node->fragments[i].size = 0; | |
655 | } | |
656 | ||
c6c8fea2 | 657 | return orig_node; |
c6c8fea2 SE |
658 | free_orig_node: |
659 | kfree(orig_node); | |
660 | return NULL; | |
661 | } | |
662 | ||
7351a482 SW |
663 | /** |
664 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
665 | * @bat_priv: the bat priv with all the soft interface information | |
666 | * @orig_node: orig node which is to be checked | |
667 | * | |
668 | * Returns true if any ifinfo entry was purged, false otherwise. | |
669 | */ | |
670 | static bool | |
671 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
672 | struct batadv_orig_node *orig_node) | |
673 | { | |
674 | struct batadv_orig_ifinfo *orig_ifinfo; | |
675 | struct batadv_hard_iface *if_outgoing; | |
676 | struct hlist_node *node_tmp; | |
677 | bool ifinfo_purged = false; | |
678 | ||
679 | spin_lock_bh(&orig_node->neigh_list_lock); | |
680 | ||
681 | /* for all ifinfo objects for this originator */ | |
682 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
683 | &orig_node->ifinfo_list, list) { | |
684 | if_outgoing = orig_ifinfo->if_outgoing; | |
685 | ||
686 | /* always keep the default interface */ | |
687 | if (if_outgoing == BATADV_IF_DEFAULT) | |
688 | continue; | |
689 | ||
690 | /* don't purge if the interface is not (going) down */ | |
691 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
692 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
693 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
694 | continue; | |
695 | ||
696 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
697 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
698 | orig_node->orig, if_outgoing->net_dev->name); | |
699 | ||
700 | ifinfo_purged = true; | |
701 | ||
702 | hlist_del_rcu(&orig_ifinfo->list); | |
703 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
f3b3d901 SW |
704 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
705 | orig_node->last_bonding_candidate = NULL; | |
706 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
707 | } | |
7351a482 SW |
708 | } |
709 | ||
710 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
711 | ||
712 | return ifinfo_purged; | |
713 | } | |
714 | ||
715 | ||
89652331 SW |
716 | /** |
717 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
718 | * @bat_priv: the bat priv with all the soft interface information | |
719 | * @orig_node: orig node which is to be checked | |
720 | * | |
721 | * Returns true if any neighbor was purged, false otherwise | |
722 | */ | |
56303d34 SE |
723 | static bool |
724 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 725 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 726 | { |
b67bfe0d | 727 | struct hlist_node *node_tmp; |
56303d34 | 728 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 729 | bool neigh_purged = false; |
0b0094e0 | 730 | unsigned long last_seen; |
56303d34 | 731 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 732 | |
f987ed6e ML |
733 | spin_lock_bh(&orig_node->neigh_list_lock); |
734 | ||
c6c8fea2 | 735 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 736 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 737 | &orig_node->neigh_list, list) { |
1eda58bf SE |
738 | last_seen = neigh_node->last_seen; |
739 | if_incoming = neigh_node->if_incoming; | |
740 | ||
42d0b044 | 741 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
742 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
743 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
744 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
745 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
746 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
747 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 748 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
749 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
750 | orig_node->orig, neigh_node->addr, | |
751 | if_incoming->net_dev->name); | |
c6c8fea2 | 752 | else |
39c75a51 | 753 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
754 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
755 | orig_node->orig, neigh_node->addr, | |
756 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
757 | |
758 | neigh_purged = true; | |
9591a79f | 759 | |
f987ed6e | 760 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 761 | batadv_neigh_node_free_ref(neigh_node); |
c6c8fea2 SE |
762 | } |
763 | } | |
f987ed6e ML |
764 | |
765 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
766 | return neigh_purged; |
767 | } | |
768 | ||
89652331 SW |
769 | /** |
770 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
771 | * @bat_priv: the bat priv with all the soft interface information | |
772 | * @orig_node: orig node which is to be checked | |
773 | * @if_outgoing: the interface for which the metric should be compared | |
774 | * | |
775 | * Returns the current best neighbor, with refcount increased. | |
776 | */ | |
777 | static struct batadv_neigh_node * | |
778 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
779 | struct batadv_orig_node *orig_node, | |
780 | struct batadv_hard_iface *if_outgoing) | |
781 | { | |
782 | struct batadv_neigh_node *best = NULL, *neigh; | |
783 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
784 | ||
785 | rcu_read_lock(); | |
786 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
787 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
788 | best, if_outgoing) <= 0)) | |
789 | continue; | |
790 | ||
791 | if (!atomic_inc_not_zero(&neigh->refcount)) | |
792 | continue; | |
793 | ||
794 | if (best) | |
795 | batadv_neigh_node_free_ref(best); | |
796 | ||
797 | best = neigh; | |
798 | } | |
799 | rcu_read_unlock(); | |
800 | ||
801 | return best; | |
802 | } | |
803 | ||
7351a482 SW |
804 | /** |
805 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
806 | * @bat_priv: the bat priv with all the soft interface information | |
807 | * @orig_node: orig node which is to be checked | |
808 | * | |
809 | * This function checks if the orig_node or substructures of it have become | |
810 | * obsolete, and purges this information if that's the case. | |
811 | * | |
812 | * Returns true if the orig_node is to be removed, false otherwise. | |
813 | */ | |
56303d34 SE |
814 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
815 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 816 | { |
56303d34 | 817 | struct batadv_neigh_node *best_neigh_node; |
7351a482 SW |
818 | struct batadv_hard_iface *hard_iface; |
819 | bool changed; | |
c6c8fea2 | 820 | |
42d0b044 SE |
821 | if (batadv_has_timed_out(orig_node->last_seen, |
822 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 823 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
824 | "Originator timeout: originator %pM, last_seen %u\n", |
825 | orig_node->orig, | |
826 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 827 | return true; |
c6c8fea2 | 828 | } |
7351a482 SW |
829 | changed = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
830 | changed = changed || batadv_purge_orig_neighbors(bat_priv, orig_node); | |
831 | ||
832 | if (!changed) | |
89652331 SW |
833 | return false; |
834 | ||
7351a482 | 835 | /* first for NULL ... */ |
89652331 SW |
836 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
837 | BATADV_IF_DEFAULT); | |
7351a482 SW |
838 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
839 | best_neigh_node); | |
89652331 SW |
840 | if (best_neigh_node) |
841 | batadv_neigh_node_free_ref(best_neigh_node); | |
c6c8fea2 | 842 | |
7351a482 SW |
843 | /* ... then for all other interfaces. */ |
844 | rcu_read_lock(); | |
845 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
846 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
847 | continue; | |
848 | ||
849 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
850 | continue; | |
851 | ||
852 | best_neigh_node = batadv_find_best_neighbor(bat_priv, | |
853 | orig_node, | |
854 | hard_iface); | |
855 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
856 | best_neigh_node); | |
857 | if (best_neigh_node) | |
858 | batadv_neigh_node_free_ref(best_neigh_node); | |
859 | } | |
860 | rcu_read_unlock(); | |
861 | ||
c6c8fea2 SE |
862 | return false; |
863 | } | |
864 | ||
56303d34 | 865 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 866 | { |
5bf74e9c | 867 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 868 | struct hlist_node *node_tmp; |
c6c8fea2 | 869 | struct hlist_head *head; |
fb778ea1 | 870 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 871 | struct batadv_orig_node *orig_node; |
c90681b8 | 872 | uint32_t i; |
c6c8fea2 SE |
873 | |
874 | if (!hash) | |
875 | return; | |
876 | ||
c6c8fea2 SE |
877 | /* for all origins... */ |
878 | for (i = 0; i < hash->size; i++) { | |
879 | head = &hash->table[i]; | |
fb778ea1 | 880 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 881 | |
fb778ea1 | 882 | spin_lock_bh(list_lock); |
b67bfe0d | 883 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 884 | head, hash_entry) { |
03fc7f86 | 885 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 886 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 887 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 888 | batadv_orig_node_free_ref(orig_node); |
fb778ea1 | 889 | continue; |
c6c8fea2 | 890 | } |
610bfc6b MH |
891 | |
892 | batadv_frag_purge_orig(orig_node, | |
893 | batadv_frag_check_entry); | |
c6c8fea2 | 894 | } |
fb778ea1 | 895 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
896 | } |
897 | ||
7cf06bc6 SE |
898 | batadv_gw_node_purge(bat_priv); |
899 | batadv_gw_election(bat_priv); | |
c6c8fea2 SE |
900 | } |
901 | ||
03fc7f86 | 902 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 903 | { |
56303d34 SE |
904 | struct delayed_work *delayed_work; |
905 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 906 | |
56303d34 SE |
907 | delayed_work = container_of(work, struct delayed_work, work); |
908 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 909 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
910 | queue_delayed_work(batadv_event_workqueue, |
911 | &bat_priv->orig_work, | |
912 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
913 | } |
914 | ||
56303d34 | 915 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 916 | { |
03fc7f86 | 917 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
918 | } |
919 | ||
7d211efc | 920 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
921 | { |
922 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 923 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 924 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 925 | |
30da63a6 ML |
926 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
927 | if (!primary_if) | |
737a2a22 | 928 | return 0; |
c6c8fea2 | 929 | |
737a2a22 | 930 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 931 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
932 | primary_if->net_dev->dev_addr, net_dev->name, |
933 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 934 | |
737a2a22 | 935 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 936 | |
737a2a22 AQ |
937 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
938 | seq_puts(seq, | |
939 | "No printing function for this routing protocol\n"); | |
940 | return 0; | |
c6c8fea2 SE |
941 | } |
942 | ||
737a2a22 | 943 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq); |
c6c8fea2 | 944 | |
30da63a6 | 945 | return 0; |
c6c8fea2 SE |
946 | } |
947 | ||
56303d34 SE |
948 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
949 | int max_if_num) | |
c6c8fea2 | 950 | { |
56303d34 | 951 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 952 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 953 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 954 | struct hlist_head *head; |
56303d34 | 955 | struct batadv_orig_node *orig_node; |
c90681b8 AQ |
956 | uint32_t i; |
957 | int ret; | |
c6c8fea2 SE |
958 | |
959 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
960 | * if_num |
961 | */ | |
c6c8fea2 SE |
962 | for (i = 0; i < hash->size; i++) { |
963 | head = &hash->table[i]; | |
964 | ||
fb778ea1 | 965 | rcu_read_lock(); |
b67bfe0d | 966 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
967 | ret = 0; |
968 | if (bao->bat_orig_add_if) | |
969 | ret = bao->bat_orig_add_if(orig_node, | |
970 | max_if_num); | |
5346c35e | 971 | if (ret == -ENOMEM) |
c6c8fea2 SE |
972 | goto err; |
973 | } | |
fb778ea1 | 974 | rcu_read_unlock(); |
c6c8fea2 SE |
975 | } |
976 | ||
c6c8fea2 SE |
977 | return 0; |
978 | ||
979 | err: | |
fb778ea1 | 980 | rcu_read_unlock(); |
c6c8fea2 SE |
981 | return -ENOMEM; |
982 | } | |
983 | ||
56303d34 SE |
984 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
985 | int max_if_num) | |
c6c8fea2 | 986 | { |
56303d34 | 987 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 988 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 989 | struct hlist_head *head; |
56303d34 SE |
990 | struct batadv_hard_iface *hard_iface_tmp; |
991 | struct batadv_orig_node *orig_node; | |
d0015fdd | 992 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
c90681b8 AQ |
993 | uint32_t i; |
994 | int ret; | |
c6c8fea2 SE |
995 | |
996 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
997 | * if_num |
998 | */ | |
c6c8fea2 SE |
999 | for (i = 0; i < hash->size; i++) { |
1000 | head = &hash->table[i]; | |
1001 | ||
fb778ea1 | 1002 | rcu_read_lock(); |
b67bfe0d | 1003 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1004 | ret = 0; |
1005 | if (bao->bat_orig_del_if) | |
1006 | ret = bao->bat_orig_del_if(orig_node, | |
1007 | max_if_num, | |
1008 | hard_iface->if_num); | |
5346c35e | 1009 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1010 | goto err; |
1011 | } | |
fb778ea1 | 1012 | rcu_read_unlock(); |
c6c8fea2 SE |
1013 | } |
1014 | ||
1015 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1016 | rcu_read_lock(); | |
3193e8fd | 1017 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1018 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1019 | continue; |
1020 | ||
e6c10f43 | 1021 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1022 | continue; |
1023 | ||
e6c10f43 | 1024 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1025 | continue; |
1026 | ||
e6c10f43 ML |
1027 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1028 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1029 | } |
1030 | rcu_read_unlock(); | |
1031 | ||
e6c10f43 | 1032 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1033 | return 0; |
1034 | ||
1035 | err: | |
fb778ea1 | 1036 | rcu_read_unlock(); |
c6c8fea2 SE |
1037 | return -ENOMEM; |
1038 | } |