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9f6446c7 | 1 | /* Copyright (C) 2009-2015 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 | ||
1e2c2a4f | 18 | #include "originator.h" |
c6c8fea2 | 19 | #include "main.h" |
1e2c2a4f SE |
20 | |
21 | #include <linux/errno.h> | |
22 | #include <linux/etherdevice.h> | |
23 | #include <linux/fs.h> | |
24 | #include <linux/jiffies.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/list.h> | |
27 | #include <linux/lockdep.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/seq_file.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/workqueue.h> | |
33 | ||
785ea114 | 34 | #include "distributed-arp-table.h" |
1e2c2a4f | 35 | #include "fragmentation.h" |
c6c8fea2 SE |
36 | #include "gateway_client.h" |
37 | #include "hard-interface.h" | |
1e2c2a4f | 38 | #include "hash.h" |
60432d75 | 39 | #include "multicast.h" |
1e2c2a4f SE |
40 | #include "network-coding.h" |
41 | #include "routing.h" | |
42 | #include "translation-table.h" | |
c6c8fea2 | 43 | |
dec05074 AQ |
44 | /* hash class keys */ |
45 | static struct lock_class_key batadv_orig_hash_lock_class_key; | |
46 | ||
03fc7f86 | 47 | static void batadv_purge_orig(struct work_struct *work); |
c6c8fea2 | 48 | |
b8e2dd13 | 49 | /* returns 1 if they are the same originator */ |
bbad0a5e | 50 | int batadv_compare_orig(const struct hlist_node *node, const void *data2) |
b8e2dd13 | 51 | { |
56303d34 SE |
52 | const void *data1 = container_of(node, struct batadv_orig_node, |
53 | hash_entry); | |
b8e2dd13 | 54 | |
323813ed | 55 | return batadv_compare_eth(data1, data2); |
b8e2dd13 SE |
56 | } |
57 | ||
7ea7b4a1 AQ |
58 | /** |
59 | * batadv_orig_node_vlan_get - get an orig_node_vlan object | |
60 | * @orig_node: the originator serving the VLAN | |
61 | * @vid: the VLAN identifier | |
62 | * | |
63 | * Returns the vlan object identified by vid and belonging to orig_node or NULL | |
64 | * if it does not exist. | |
65 | */ | |
66 | struct batadv_orig_node_vlan * | |
67 | batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, | |
68 | unsigned short vid) | |
69 | { | |
70 | struct batadv_orig_node_vlan *vlan = NULL, *tmp; | |
71 | ||
72 | rcu_read_lock(); | |
73 | list_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) { | |
74 | if (tmp->vid != vid) | |
75 | continue; | |
76 | ||
77 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
78 | continue; | |
79 | ||
80 | vlan = tmp; | |
81 | ||
82 | break; | |
83 | } | |
84 | rcu_read_unlock(); | |
85 | ||
86 | return vlan; | |
87 | } | |
88 | ||
89 | /** | |
90 | * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan | |
91 | * object | |
92 | * @orig_node: the originator serving the VLAN | |
93 | * @vid: the VLAN identifier | |
94 | * | |
95 | * Returns NULL in case of failure or the vlan object identified by vid and | |
96 | * belonging to orig_node otherwise. The object is created and added to the list | |
97 | * if it does not exist. | |
98 | * | |
99 | * The object is returned with refcounter increased by 1. | |
100 | */ | |
101 | struct batadv_orig_node_vlan * | |
102 | batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, | |
103 | unsigned short vid) | |
104 | { | |
105 | struct batadv_orig_node_vlan *vlan; | |
106 | ||
107 | spin_lock_bh(&orig_node->vlan_list_lock); | |
108 | ||
109 | /* first look if an object for this vid already exists */ | |
110 | vlan = batadv_orig_node_vlan_get(orig_node, vid); | |
111 | if (vlan) | |
112 | goto out; | |
113 | ||
114 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
115 | if (!vlan) | |
116 | goto out; | |
117 | ||
118 | atomic_set(&vlan->refcount, 2); | |
119 | vlan->vid = vid; | |
120 | ||
121 | list_add_rcu(&vlan->list, &orig_node->vlan_list); | |
122 | ||
123 | out: | |
124 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
125 | ||
126 | return vlan; | |
127 | } | |
128 | ||
129 | /** | |
130 | * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free | |
131 | * the originator-vlan object | |
132 | * @orig_vlan: the originator-vlan object to release | |
133 | */ | |
134 | void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan) | |
135 | { | |
136 | if (atomic_dec_and_test(&orig_vlan->refcount)) | |
137 | kfree_rcu(orig_vlan, rcu); | |
138 | } | |
139 | ||
56303d34 | 140 | int batadv_originator_init(struct batadv_priv *bat_priv) |
c6c8fea2 SE |
141 | { |
142 | if (bat_priv->orig_hash) | |
5346c35e | 143 | return 0; |
c6c8fea2 | 144 | |
1a8eaf07 | 145 | bat_priv->orig_hash = batadv_hash_new(1024); |
c6c8fea2 SE |
146 | |
147 | if (!bat_priv->orig_hash) | |
148 | goto err; | |
149 | ||
dec05074 AQ |
150 | batadv_hash_set_lock_class(bat_priv->orig_hash, |
151 | &batadv_orig_hash_lock_class_key); | |
152 | ||
72414442 AQ |
153 | INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig); |
154 | queue_delayed_work(batadv_event_workqueue, | |
155 | &bat_priv->orig_work, | |
156 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
157 | ||
5346c35e | 158 | return 0; |
c6c8fea2 SE |
159 | |
160 | err: | |
5346c35e | 161 | return -ENOMEM; |
c6c8fea2 SE |
162 | } |
163 | ||
89652331 SW |
164 | /** |
165 | * batadv_neigh_ifinfo_free_rcu - free the neigh_ifinfo object | |
166 | * @rcu: rcu pointer of the neigh_ifinfo object | |
167 | */ | |
168 | static void batadv_neigh_ifinfo_free_rcu(struct rcu_head *rcu) | |
169 | { | |
170 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
171 | ||
172 | neigh_ifinfo = container_of(rcu, struct batadv_neigh_ifinfo, rcu); | |
173 | ||
174 | if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) | |
175 | batadv_hardif_free_ref_now(neigh_ifinfo->if_outgoing); | |
176 | ||
177 | kfree(neigh_ifinfo); | |
178 | } | |
179 | ||
180 | /** | |
181 | * batadv_neigh_ifinfo_free_now - decrement the refcounter and possibly free | |
182 | * the neigh_ifinfo (without rcu callback) | |
183 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
184 | */ | |
185 | static void | |
186 | batadv_neigh_ifinfo_free_ref_now(struct batadv_neigh_ifinfo *neigh_ifinfo) | |
187 | { | |
188 | if (atomic_dec_and_test(&neigh_ifinfo->refcount)) | |
189 | batadv_neigh_ifinfo_free_rcu(&neigh_ifinfo->rcu); | |
190 | } | |
191 | ||
192 | /** | |
193 | * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly free | |
194 | * the neigh_ifinfo | |
195 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
196 | */ | |
197 | void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo) | |
198 | { | |
199 | if (atomic_dec_and_test(&neigh_ifinfo->refcount)) | |
200 | call_rcu(&neigh_ifinfo->rcu, batadv_neigh_ifinfo_free_rcu); | |
201 | } | |
202 | ||
203 | /** | |
204 | * batadv_neigh_node_free_rcu - free the neigh_node | |
205 | * @rcu: rcu pointer of the neigh_node | |
206 | */ | |
207 | static void batadv_neigh_node_free_rcu(struct rcu_head *rcu) | |
208 | { | |
209 | struct hlist_node *node_tmp; | |
210 | struct batadv_neigh_node *neigh_node; | |
211 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
bcef1f3c | 212 | struct batadv_algo_ops *bao; |
89652331 SW |
213 | |
214 | neigh_node = container_of(rcu, struct batadv_neigh_node, rcu); | |
bcef1f3c | 215 | bao = neigh_node->orig_node->bat_priv->bat_algo_ops; |
89652331 SW |
216 | |
217 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
218 | &neigh_node->ifinfo_list, list) { | |
219 | batadv_neigh_ifinfo_free_ref_now(neigh_ifinfo); | |
220 | } | |
bcef1f3c AQ |
221 | |
222 | if (bao->bat_neigh_free) | |
223 | bao->bat_neigh_free(neigh_node); | |
224 | ||
89652331 SW |
225 | batadv_hardif_free_ref_now(neigh_node->if_incoming); |
226 | ||
227 | kfree(neigh_node); | |
228 | } | |
229 | ||
230 | /** | |
231 | * batadv_neigh_node_free_ref_now - decrement the neighbors refcounter | |
232 | * and possibly free it (without rcu callback) | |
233 | * @neigh_node: neigh neighbor to free | |
234 | */ | |
235 | static void | |
236 | batadv_neigh_node_free_ref_now(struct batadv_neigh_node *neigh_node) | |
237 | { | |
238 | if (atomic_dec_and_test(&neigh_node->refcount)) | |
239 | batadv_neigh_node_free_rcu(&neigh_node->rcu); | |
240 | } | |
241 | ||
242 | /** | |
243 | * batadv_neigh_node_free_ref - decrement the neighbors refcounter | |
244 | * and possibly free it | |
245 | * @neigh_node: neigh neighbor to free | |
246 | */ | |
56303d34 | 247 | void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) |
a4c135c5 | 248 | { |
44524fcd | 249 | if (atomic_dec_and_test(&neigh_node->refcount)) |
89652331 | 250 | call_rcu(&neigh_node->rcu, batadv_neigh_node_free_rcu); |
a4c135c5 SW |
251 | } |
252 | ||
7351a482 SW |
253 | /** |
254 | * batadv_orig_node_get_router - router to the originator depending on iface | |
255 | * @orig_node: the orig node for the router | |
256 | * @if_outgoing: the interface where the payload packet has been received or | |
257 | * the OGM should be sent to | |
258 | * | |
259 | * Returns the neighbor which should be router for this orig_node/iface. | |
260 | * | |
261 | * The object is returned with refcounter increased by 1. | |
262 | */ | |
56303d34 | 263 | struct batadv_neigh_node * |
7351a482 SW |
264 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
265 | const struct batadv_hard_iface *if_outgoing) | |
e1a5382f | 266 | { |
7351a482 SW |
267 | struct batadv_orig_ifinfo *orig_ifinfo; |
268 | struct batadv_neigh_node *router = NULL; | |
e1a5382f LL |
269 | |
270 | rcu_read_lock(); | |
7351a482 SW |
271 | hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { |
272 | if (orig_ifinfo->if_outgoing != if_outgoing) | |
273 | continue; | |
274 | ||
275 | router = rcu_dereference(orig_ifinfo->router); | |
276 | break; | |
277 | } | |
e1a5382f LL |
278 | |
279 | if (router && !atomic_inc_not_zero(&router->refcount)) | |
280 | router = NULL; | |
281 | ||
282 | rcu_read_unlock(); | |
283 | return router; | |
284 | } | |
285 | ||
7351a482 SW |
286 | /** |
287 | * batadv_orig_ifinfo_get - find the ifinfo from an orig_node | |
288 | * @orig_node: the orig node to be queried | |
289 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
290 | * | |
291 | * Returns the requested orig_ifinfo or NULL if not found. | |
292 | * | |
293 | * The object is returned with refcounter increased by 1. | |
294 | */ | |
295 | struct batadv_orig_ifinfo * | |
296 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
297 | struct batadv_hard_iface *if_outgoing) | |
298 | { | |
299 | struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; | |
300 | ||
301 | rcu_read_lock(); | |
302 | hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, | |
303 | list) { | |
304 | if (tmp->if_outgoing != if_outgoing) | |
305 | continue; | |
306 | ||
307 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
308 | continue; | |
309 | ||
310 | orig_ifinfo = tmp; | |
311 | break; | |
312 | } | |
313 | rcu_read_unlock(); | |
314 | ||
315 | return orig_ifinfo; | |
316 | } | |
317 | ||
318 | /** | |
319 | * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object | |
320 | * @orig_node: the orig node to be queried | |
321 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
322 | * | |
323 | * Returns NULL in case of failure or the orig_ifinfo object for the if_outgoing | |
324 | * interface otherwise. The object is created and added to the list | |
325 | * if it does not exist. | |
326 | * | |
327 | * The object is returned with refcounter increased by 1. | |
328 | */ | |
329 | struct batadv_orig_ifinfo * | |
330 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
331 | struct batadv_hard_iface *if_outgoing) | |
332 | { | |
333 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; | |
334 | unsigned long reset_time; | |
335 | ||
336 | spin_lock_bh(&orig_node->neigh_list_lock); | |
337 | ||
338 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
339 | if (orig_ifinfo) | |
340 | goto out; | |
341 | ||
342 | orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); | |
343 | if (!orig_ifinfo) | |
344 | goto out; | |
345 | ||
346 | if (if_outgoing != BATADV_IF_DEFAULT && | |
347 | !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
348 | kfree(orig_ifinfo); | |
349 | orig_ifinfo = NULL; | |
350 | goto out; | |
351 | } | |
352 | ||
353 | reset_time = jiffies - 1; | |
354 | reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); | |
355 | orig_ifinfo->batman_seqno_reset = reset_time; | |
356 | orig_ifinfo->if_outgoing = if_outgoing; | |
357 | INIT_HLIST_NODE(&orig_ifinfo->list); | |
358 | atomic_set(&orig_ifinfo->refcount, 2); | |
359 | hlist_add_head_rcu(&orig_ifinfo->list, | |
360 | &orig_node->ifinfo_list); | |
361 | out: | |
362 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
363 | return orig_ifinfo; | |
364 | } | |
365 | ||
89652331 SW |
366 | /** |
367 | * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node | |
368 | * @neigh_node: the neigh node to be queried | |
369 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
370 | * | |
371 | * The object is returned with refcounter increased by 1. | |
372 | * | |
373 | * Returns the requested neigh_ifinfo or NULL if not found | |
374 | */ | |
375 | struct batadv_neigh_ifinfo * | |
376 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
377 | struct batadv_hard_iface *if_outgoing) | |
378 | { | |
379 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, | |
380 | *tmp_neigh_ifinfo; | |
381 | ||
382 | rcu_read_lock(); | |
383 | hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, | |
384 | list) { | |
385 | if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) | |
386 | continue; | |
387 | ||
388 | if (!atomic_inc_not_zero(&tmp_neigh_ifinfo->refcount)) | |
389 | continue; | |
390 | ||
391 | neigh_ifinfo = tmp_neigh_ifinfo; | |
392 | break; | |
393 | } | |
394 | rcu_read_unlock(); | |
395 | ||
396 | return neigh_ifinfo; | |
397 | } | |
398 | ||
399 | /** | |
400 | * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object | |
401 | * @neigh_node: the neigh node to be queried | |
402 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
403 | * | |
404 | * Returns NULL in case of failure or the neigh_ifinfo object for the | |
405 | * if_outgoing interface otherwise. The object is created and added to the list | |
406 | * if it does not exist. | |
407 | * | |
408 | * The object is returned with refcounter increased by 1. | |
409 | */ | |
410 | struct batadv_neigh_ifinfo * | |
411 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
412 | struct batadv_hard_iface *if_outgoing) | |
413 | { | |
414 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
415 | ||
416 | spin_lock_bh(&neigh->ifinfo_lock); | |
417 | ||
418 | neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); | |
419 | if (neigh_ifinfo) | |
420 | goto out; | |
421 | ||
422 | neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); | |
423 | if (!neigh_ifinfo) | |
424 | goto out; | |
425 | ||
426 | if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
427 | kfree(neigh_ifinfo); | |
428 | neigh_ifinfo = NULL; | |
429 | goto out; | |
430 | } | |
431 | ||
432 | INIT_HLIST_NODE(&neigh_ifinfo->list); | |
433 | atomic_set(&neigh_ifinfo->refcount, 2); | |
434 | neigh_ifinfo->if_outgoing = if_outgoing; | |
435 | ||
436 | hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); | |
437 | ||
438 | out: | |
439 | spin_unlock_bh(&neigh->ifinfo_lock); | |
440 | ||
441 | return neigh_ifinfo; | |
442 | } | |
443 | ||
0538f759 AQ |
444 | /** |
445 | * batadv_neigh_node_new - create and init a new neigh_node object | |
446 | * @hard_iface: the interface where the neighbour is connected to | |
447 | * @neigh_addr: the mac address of the neighbour interface | |
448 | * @orig_node: originator object representing the neighbour | |
449 | * | |
450 | * Allocates a new neigh_node object and initialises all the generic fields. | |
451 | * Returns the new object or NULL on failure. | |
452 | */ | |
56303d34 SE |
453 | struct batadv_neigh_node * |
454 | batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, | |
6b5e971a | 455 | const u8 *neigh_addr, struct batadv_orig_node *orig_node) |
c6c8fea2 | 456 | { |
56303d34 | 457 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 458 | |
704509b8 | 459 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 460 | if (!neigh_node) |
7ae8b285 | 461 | goto out; |
c6c8fea2 | 462 | |
9591a79f | 463 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
464 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
465 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 466 | |
8fdd0153 | 467 | ether_addr_copy(neigh_node->addr, neigh_addr); |
0538f759 AQ |
468 | neigh_node->if_incoming = hard_iface; |
469 | neigh_node->orig_node = orig_node; | |
470 | ||
1605d0d6 ML |
471 | /* extra reference for return */ |
472 | atomic_set(&neigh_node->refcount, 2); | |
c6c8fea2 | 473 | |
7ae8b285 | 474 | out: |
c6c8fea2 SE |
475 | return neigh_node; |
476 | } | |
477 | ||
08bf0ed2 AQ |
478 | /** |
479 | * batadv_neigh_node_get - retrieve a neighbour from the list | |
480 | * @orig_node: originator which the neighbour belongs to | |
481 | * @hard_iface: the interface where this neighbour is connected to | |
482 | * @addr: the address of the neighbour | |
483 | * | |
484 | * Looks for and possibly returns a neighbour belonging to this originator list | |
485 | * which is connected through the provided hard interface. | |
486 | * Returns NULL if the neighbour is not found. | |
487 | */ | |
488 | struct batadv_neigh_node * | |
489 | batadv_neigh_node_get(const struct batadv_orig_node *orig_node, | |
490 | const struct batadv_hard_iface *hard_iface, | |
6b5e971a | 491 | const u8 *addr) |
08bf0ed2 AQ |
492 | { |
493 | struct batadv_neigh_node *tmp_neigh_node, *res = NULL; | |
494 | ||
495 | rcu_read_lock(); | |
496 | hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { | |
497 | if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) | |
498 | continue; | |
499 | ||
500 | if (tmp_neigh_node->if_incoming != hard_iface) | |
501 | continue; | |
502 | ||
503 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) | |
504 | continue; | |
505 | ||
506 | res = tmp_neigh_node; | |
507 | break; | |
508 | } | |
509 | rcu_read_unlock(); | |
510 | ||
511 | return res; | |
512 | } | |
513 | ||
7351a482 SW |
514 | /** |
515 | * batadv_orig_ifinfo_free_rcu - free the orig_ifinfo object | |
516 | * @rcu: rcu pointer of the orig_ifinfo object | |
517 | */ | |
518 | static void batadv_orig_ifinfo_free_rcu(struct rcu_head *rcu) | |
519 | { | |
520 | struct batadv_orig_ifinfo *orig_ifinfo; | |
000c8dff | 521 | struct batadv_neigh_node *router; |
7351a482 SW |
522 | |
523 | orig_ifinfo = container_of(rcu, struct batadv_orig_ifinfo, rcu); | |
524 | ||
525 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) | |
526 | batadv_hardif_free_ref_now(orig_ifinfo->if_outgoing); | |
527 | ||
000c8dff SW |
528 | /* this is the last reference to this object */ |
529 | router = rcu_dereference_protected(orig_ifinfo->router, true); | |
530 | if (router) | |
531 | batadv_neigh_node_free_ref_now(router); | |
7351a482 SW |
532 | kfree(orig_ifinfo); |
533 | } | |
534 | ||
535 | /** | |
536 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free | |
537 | * the orig_ifinfo (without rcu callback) | |
538 | * @orig_ifinfo: the orig_ifinfo object to release | |
539 | */ | |
540 | static void | |
541 | batadv_orig_ifinfo_free_ref_now(struct batadv_orig_ifinfo *orig_ifinfo) | |
542 | { | |
543 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
544 | batadv_orig_ifinfo_free_rcu(&orig_ifinfo->rcu); | |
545 | } | |
546 | ||
547 | /** | |
548 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free | |
549 | * the orig_ifinfo | |
550 | * @orig_ifinfo: the orig_ifinfo object to release | |
551 | */ | |
552 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) | |
553 | { | |
554 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
555 | call_rcu(&orig_ifinfo->rcu, batadv_orig_ifinfo_free_rcu); | |
556 | } | |
557 | ||
03fc7f86 | 558 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 559 | { |
b67bfe0d | 560 | struct hlist_node *node_tmp; |
f6c8b711 | 561 | struct batadv_neigh_node *neigh_node; |
56303d34 | 562 | struct batadv_orig_node *orig_node; |
7351a482 | 563 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 564 | |
56303d34 | 565 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); |
c6c8fea2 | 566 | |
f987ed6e ML |
567 | spin_lock_bh(&orig_node->neigh_list_lock); |
568 | ||
c6c8fea2 | 569 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 570 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 571 | &orig_node->neigh_list, list) { |
f987ed6e | 572 | hlist_del_rcu(&neigh_node->list); |
89652331 | 573 | batadv_neigh_node_free_ref_now(neigh_node); |
c6c8fea2 SE |
574 | } |
575 | ||
7351a482 SW |
576 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
577 | &orig_node->ifinfo_list, list) { | |
578 | hlist_del_rcu(&orig_ifinfo->list); | |
579 | batadv_orig_ifinfo_free_ref_now(orig_ifinfo); | |
580 | } | |
f987ed6e ML |
581 | spin_unlock_bh(&orig_node->neigh_list_lock); |
582 | ||
60432d75 LL |
583 | batadv_mcast_purge_orig(orig_node); |
584 | ||
d56b1705 MH |
585 | /* Free nc_nodes */ |
586 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
587 | ||
610bfc6b MH |
588 | batadv_frag_purge_orig(orig_node, NULL); |
589 | ||
d0015fdd AQ |
590 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) |
591 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
592 | ||
a73105b8 | 593 | kfree(orig_node->tt_buff); |
c6c8fea2 SE |
594 | kfree(orig_node); |
595 | } | |
596 | ||
72822225 LL |
597 | /** |
598 | * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly | |
599 | * schedule an rcu callback for freeing it | |
600 | * @orig_node: the orig node to free | |
601 | */ | |
56303d34 | 602 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) |
7b36e8ee ML |
603 | { |
604 | if (atomic_dec_and_test(&orig_node->refcount)) | |
03fc7f86 | 605 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
7b36e8ee ML |
606 | } |
607 | ||
72822225 LL |
608 | /** |
609 | * batadv_orig_node_free_ref_now - decrement the orig node refcounter and | |
610 | * possibly free it (without rcu callback) | |
611 | * @orig_node: the orig node to free | |
612 | */ | |
613 | void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node) | |
614 | { | |
615 | if (atomic_dec_and_test(&orig_node->refcount)) | |
616 | batadv_orig_node_free_rcu(&orig_node->rcu); | |
617 | } | |
618 | ||
56303d34 | 619 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 620 | { |
5bf74e9c | 621 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 622 | struct hlist_node *node_tmp; |
16b1aba8 | 623 | struct hlist_head *head; |
16b1aba8 | 624 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 625 | struct batadv_orig_node *orig_node; |
6b5e971a | 626 | u32 i; |
16b1aba8 ML |
627 | |
628 | if (!hash) | |
c6c8fea2 SE |
629 | return; |
630 | ||
631 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
632 | ||
c6c8fea2 | 633 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
634 | |
635 | for (i = 0; i < hash->size; i++) { | |
636 | head = &hash->table[i]; | |
637 | list_lock = &hash->list_locks[i]; | |
638 | ||
639 | spin_lock_bh(list_lock); | |
b67bfe0d | 640 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 641 | head, hash_entry) { |
b67bfe0d | 642 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 643 | batadv_orig_node_free_ref(orig_node); |
16b1aba8 ML |
644 | } |
645 | spin_unlock_bh(list_lock); | |
646 | } | |
647 | ||
1a8eaf07 | 648 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
649 | } |
650 | ||
bbad0a5e AQ |
651 | /** |
652 | * batadv_orig_node_new - creates a new orig_node | |
653 | * @bat_priv: the bat priv with all the soft interface information | |
654 | * @addr: the mac address of the originator | |
655 | * | |
656 | * Creates a new originator object and initialise all the generic fields. | |
657 | * The new object is not added to the originator list. | |
658 | * Returns the newly created object or NULL on failure. | |
9cfc7bd6 | 659 | */ |
bbad0a5e | 660 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
6b5e971a | 661 | const u8 *addr) |
c6c8fea2 | 662 | { |
56303d34 | 663 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 664 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 665 | unsigned long reset_time; |
bbad0a5e | 666 | int i; |
c6c8fea2 | 667 | |
39c75a51 SE |
668 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
669 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 670 | |
704509b8 | 671 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
672 | if (!orig_node) |
673 | return NULL; | |
674 | ||
9591a79f | 675 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
7ea7b4a1 | 676 | INIT_LIST_HEAD(&orig_node->vlan_list); |
7351a482 | 677 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 678 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 679 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 680 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 681 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 682 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 683 | |
d56b1705 MH |
684 | batadv_nc_init_orig(orig_node); |
685 | ||
7b36e8ee ML |
686 | /* extra reference for return */ |
687 | atomic_set(&orig_node->refcount, 2); | |
c6c8fea2 | 688 | |
16b1aba8 | 689 | orig_node->bat_priv = bat_priv; |
8fdd0153 | 690 | ether_addr_copy(orig_node->orig, addr); |
785ea114 | 691 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 692 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 693 | orig_node->tt_buff = NULL; |
a73105b8 | 694 | orig_node->tt_buff_len = 0; |
2c667a33 | 695 | orig_node->last_seen = jiffies; |
42d0b044 SE |
696 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
697 | orig_node->bcast_seqno_reset = reset_time; | |
8a4023c5 | 698 | |
60432d75 LL |
699 | #ifdef CONFIG_BATMAN_ADV_MCAST |
700 | orig_node->mcast_flags = BATADV_NO_FLAGS; | |
8a4023c5 LL |
701 | INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node); |
702 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node); | |
703 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node); | |
704 | spin_lock_init(&orig_node->mcast_handler_lock); | |
60432d75 | 705 | #endif |
c6c8fea2 | 706 | |
7ea7b4a1 AQ |
707 | /* create a vlan object for the "untagged" LAN */ |
708 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
709 | if (!vlan) | |
710 | goto free_orig_node; | |
711 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
712 | * Immediately release vlan since it is not needed anymore in this | |
713 | * context | |
714 | */ | |
715 | batadv_orig_node_vlan_free_ref(vlan); | |
716 | ||
610bfc6b MH |
717 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
718 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
719 | spin_lock_init(&orig_node->fragments[i].lock); | |
720 | orig_node->fragments[i].size = 0; | |
721 | } | |
722 | ||
c6c8fea2 | 723 | return orig_node; |
c6c8fea2 SE |
724 | free_orig_node: |
725 | kfree(orig_node); | |
726 | return NULL; | |
727 | } | |
728 | ||
709de13f SW |
729 | /** |
730 | * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor | |
731 | * @bat_priv: the bat priv with all the soft interface information | |
732 | * @neigh: orig node which is to be checked | |
733 | */ | |
734 | static void | |
735 | batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, | |
736 | struct batadv_neigh_node *neigh) | |
737 | { | |
738 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
739 | struct batadv_hard_iface *if_outgoing; | |
740 | struct hlist_node *node_tmp; | |
741 | ||
742 | spin_lock_bh(&neigh->ifinfo_lock); | |
743 | ||
744 | /* for all ifinfo objects for this neighinator */ | |
745 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
746 | &neigh->ifinfo_list, list) { | |
747 | if_outgoing = neigh_ifinfo->if_outgoing; | |
748 | ||
749 | /* always keep the default interface */ | |
750 | if (if_outgoing == BATADV_IF_DEFAULT) | |
751 | continue; | |
752 | ||
753 | /* don't purge if the interface is not (going) down */ | |
754 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
755 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
756 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
757 | continue; | |
758 | ||
759 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
760 | "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", | |
761 | neigh->addr, if_outgoing->net_dev->name); | |
762 | ||
763 | hlist_del_rcu(&neigh_ifinfo->list); | |
764 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
765 | } | |
766 | ||
767 | spin_unlock_bh(&neigh->ifinfo_lock); | |
768 | } | |
769 | ||
7351a482 SW |
770 | /** |
771 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
772 | * @bat_priv: the bat priv with all the soft interface information | |
773 | * @orig_node: orig node which is to be checked | |
774 | * | |
775 | * Returns true if any ifinfo entry was purged, false otherwise. | |
776 | */ | |
777 | static bool | |
778 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
779 | struct batadv_orig_node *orig_node) | |
780 | { | |
781 | struct batadv_orig_ifinfo *orig_ifinfo; | |
782 | struct batadv_hard_iface *if_outgoing; | |
783 | struct hlist_node *node_tmp; | |
784 | bool ifinfo_purged = false; | |
785 | ||
786 | spin_lock_bh(&orig_node->neigh_list_lock); | |
787 | ||
788 | /* for all ifinfo objects for this originator */ | |
789 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
790 | &orig_node->ifinfo_list, list) { | |
791 | if_outgoing = orig_ifinfo->if_outgoing; | |
792 | ||
793 | /* always keep the default interface */ | |
794 | if (if_outgoing == BATADV_IF_DEFAULT) | |
795 | continue; | |
796 | ||
797 | /* don't purge if the interface is not (going) down */ | |
798 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
799 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
800 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
801 | continue; | |
802 | ||
803 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
804 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
805 | orig_node->orig, if_outgoing->net_dev->name); | |
806 | ||
807 | ifinfo_purged = true; | |
808 | ||
809 | hlist_del_rcu(&orig_ifinfo->list); | |
810 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
f3b3d901 SW |
811 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
812 | orig_node->last_bonding_candidate = NULL; | |
813 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
814 | } | |
7351a482 SW |
815 | } |
816 | ||
817 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
818 | ||
819 | return ifinfo_purged; | |
820 | } | |
821 | ||
89652331 SW |
822 | /** |
823 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
824 | * @bat_priv: the bat priv with all the soft interface information | |
825 | * @orig_node: orig node which is to be checked | |
826 | * | |
827 | * Returns true if any neighbor was purged, false otherwise | |
828 | */ | |
56303d34 SE |
829 | static bool |
830 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 831 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 832 | { |
b67bfe0d | 833 | struct hlist_node *node_tmp; |
56303d34 | 834 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 835 | bool neigh_purged = false; |
0b0094e0 | 836 | unsigned long last_seen; |
56303d34 | 837 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 838 | |
f987ed6e ML |
839 | spin_lock_bh(&orig_node->neigh_list_lock); |
840 | ||
c6c8fea2 | 841 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 842 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 843 | &orig_node->neigh_list, list) { |
1eda58bf SE |
844 | last_seen = neigh_node->last_seen; |
845 | if_incoming = neigh_node->if_incoming; | |
846 | ||
42d0b044 | 847 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
848 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
849 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
850 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
851 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
852 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
853 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 854 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
855 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
856 | orig_node->orig, neigh_node->addr, | |
857 | if_incoming->net_dev->name); | |
c6c8fea2 | 858 | else |
39c75a51 | 859 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
860 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
861 | orig_node->orig, neigh_node->addr, | |
862 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
863 | |
864 | neigh_purged = true; | |
9591a79f | 865 | |
f987ed6e | 866 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 867 | batadv_neigh_node_free_ref(neigh_node); |
709de13f SW |
868 | } else { |
869 | /* only necessary if not the whole neighbor is to be | |
870 | * deleted, but some interface has been removed. | |
871 | */ | |
872 | batadv_purge_neigh_ifinfo(bat_priv, neigh_node); | |
c6c8fea2 SE |
873 | } |
874 | } | |
f987ed6e ML |
875 | |
876 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
877 | return neigh_purged; |
878 | } | |
879 | ||
89652331 SW |
880 | /** |
881 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
882 | * @bat_priv: the bat priv with all the soft interface information | |
883 | * @orig_node: orig node which is to be checked | |
884 | * @if_outgoing: the interface for which the metric should be compared | |
885 | * | |
886 | * Returns the current best neighbor, with refcount increased. | |
887 | */ | |
888 | static struct batadv_neigh_node * | |
889 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
890 | struct batadv_orig_node *orig_node, | |
891 | struct batadv_hard_iface *if_outgoing) | |
892 | { | |
893 | struct batadv_neigh_node *best = NULL, *neigh; | |
894 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
895 | ||
896 | rcu_read_lock(); | |
897 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
898 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
899 | best, if_outgoing) <= 0)) | |
900 | continue; | |
901 | ||
902 | if (!atomic_inc_not_zero(&neigh->refcount)) | |
903 | continue; | |
904 | ||
905 | if (best) | |
906 | batadv_neigh_node_free_ref(best); | |
907 | ||
908 | best = neigh; | |
909 | } | |
910 | rcu_read_unlock(); | |
911 | ||
912 | return best; | |
913 | } | |
914 | ||
7351a482 SW |
915 | /** |
916 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
917 | * @bat_priv: the bat priv with all the soft interface information | |
918 | * @orig_node: orig node which is to be checked | |
919 | * | |
920 | * This function checks if the orig_node or substructures of it have become | |
921 | * obsolete, and purges this information if that's the case. | |
922 | * | |
923 | * Returns true if the orig_node is to be removed, false otherwise. | |
924 | */ | |
56303d34 SE |
925 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
926 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 927 | { |
56303d34 | 928 | struct batadv_neigh_node *best_neigh_node; |
7351a482 | 929 | struct batadv_hard_iface *hard_iface; |
7b955a9f | 930 | bool changed_ifinfo, changed_neigh; |
c6c8fea2 | 931 | |
42d0b044 SE |
932 | if (batadv_has_timed_out(orig_node->last_seen, |
933 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 934 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
935 | "Originator timeout: originator %pM, last_seen %u\n", |
936 | orig_node->orig, | |
937 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 938 | return true; |
c6c8fea2 | 939 | } |
7b955a9f SW |
940 | changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
941 | changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); | |
7351a482 | 942 | |
7b955a9f | 943 | if (!changed_ifinfo && !changed_neigh) |
89652331 SW |
944 | return false; |
945 | ||
7351a482 | 946 | /* first for NULL ... */ |
89652331 SW |
947 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
948 | BATADV_IF_DEFAULT); | |
7351a482 SW |
949 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
950 | best_neigh_node); | |
89652331 SW |
951 | if (best_neigh_node) |
952 | batadv_neigh_node_free_ref(best_neigh_node); | |
c6c8fea2 | 953 | |
7351a482 SW |
954 | /* ... then for all other interfaces. */ |
955 | rcu_read_lock(); | |
956 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
957 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
958 | continue; | |
959 | ||
960 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
961 | continue; | |
962 | ||
963 | best_neigh_node = batadv_find_best_neighbor(bat_priv, | |
964 | orig_node, | |
965 | hard_iface); | |
966 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
967 | best_neigh_node); | |
968 | if (best_neigh_node) | |
969 | batadv_neigh_node_free_ref(best_neigh_node); | |
970 | } | |
971 | rcu_read_unlock(); | |
972 | ||
c6c8fea2 SE |
973 | return false; |
974 | } | |
975 | ||
56303d34 | 976 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 977 | { |
5bf74e9c | 978 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 979 | struct hlist_node *node_tmp; |
c6c8fea2 | 980 | struct hlist_head *head; |
fb778ea1 | 981 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 982 | struct batadv_orig_node *orig_node; |
6b5e971a | 983 | u32 i; |
c6c8fea2 SE |
984 | |
985 | if (!hash) | |
986 | return; | |
987 | ||
c6c8fea2 SE |
988 | /* for all origins... */ |
989 | for (i = 0; i < hash->size; i++) { | |
990 | head = &hash->table[i]; | |
fb778ea1 | 991 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 992 | |
fb778ea1 | 993 | spin_lock_bh(list_lock); |
b67bfe0d | 994 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 995 | head, hash_entry) { |
03fc7f86 | 996 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 997 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 998 | hlist_del_rcu(&orig_node->hash_entry); |
9d31b3ce LL |
999 | batadv_tt_global_del_orig(orig_node->bat_priv, |
1000 | orig_node, -1, | |
1001 | "originator timed out"); | |
7d211efc | 1002 | batadv_orig_node_free_ref(orig_node); |
fb778ea1 | 1003 | continue; |
c6c8fea2 | 1004 | } |
610bfc6b MH |
1005 | |
1006 | batadv_frag_purge_orig(orig_node, | |
1007 | batadv_frag_check_entry); | |
c6c8fea2 | 1008 | } |
fb778ea1 | 1009 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
1010 | } |
1011 | ||
7cf06bc6 SE |
1012 | batadv_gw_node_purge(bat_priv); |
1013 | batadv_gw_election(bat_priv); | |
c6c8fea2 SE |
1014 | } |
1015 | ||
03fc7f86 | 1016 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 1017 | { |
56303d34 SE |
1018 | struct delayed_work *delayed_work; |
1019 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1020 | |
56303d34 SE |
1021 | delayed_work = container_of(work, struct delayed_work, work); |
1022 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 1023 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
1024 | queue_delayed_work(batadv_event_workqueue, |
1025 | &bat_priv->orig_work, | |
1026 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
1027 | } |
1028 | ||
56303d34 | 1029 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 1030 | { |
03fc7f86 | 1031 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
1032 | } |
1033 | ||
7d211efc | 1034 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1035 | { |
1036 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1037 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 1038 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 1039 | |
30da63a6 ML |
1040 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1041 | if (!primary_if) | |
737a2a22 | 1042 | return 0; |
c6c8fea2 | 1043 | |
737a2a22 | 1044 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 1045 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
1046 | primary_if->net_dev->dev_addr, net_dev->name, |
1047 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 1048 | |
737a2a22 | 1049 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 1050 | |
737a2a22 AQ |
1051 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
1052 | seq_puts(seq, | |
1053 | "No printing function for this routing protocol\n"); | |
1054 | return 0; | |
c6c8fea2 SE |
1055 | } |
1056 | ||
cb1c92ec SW |
1057 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, |
1058 | BATADV_IF_DEFAULT); | |
c6c8fea2 | 1059 | |
30da63a6 | 1060 | return 0; |
c6c8fea2 SE |
1061 | } |
1062 | ||
cb1c92ec SW |
1063 | /** |
1064 | * batadv_orig_hardif_seq_print_text - writes originator infos for a specific | |
1065 | * outgoing interface | |
1066 | * @seq: debugfs table seq_file struct | |
1067 | * @offset: not used | |
1068 | * | |
1069 | * Returns 0 | |
1070 | */ | |
1071 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) | |
1072 | { | |
1073 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1074 | struct batadv_hard_iface *hard_iface; | |
1075 | struct batadv_priv *bat_priv; | |
1076 | ||
1077 | hard_iface = batadv_hardif_get_by_netdev(net_dev); | |
1078 | ||
1079 | if (!hard_iface || !hard_iface->soft_iface) { | |
1080 | seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); | |
1081 | goto out; | |
1082 | } | |
1083 | ||
1084 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
1085 | if (!bat_priv->bat_algo_ops->bat_orig_print) { | |
1086 | seq_puts(seq, | |
1087 | "No printing function for this routing protocol\n"); | |
1088 | goto out; | |
1089 | } | |
1090 | ||
1091 | if (hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1092 | seq_puts(seq, "Interface not active\n"); | |
1093 | goto out; | |
1094 | } | |
1095 | ||
1096 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", | |
1097 | BATADV_SOURCE_VERSION, hard_iface->net_dev->name, | |
1098 | hard_iface->net_dev->dev_addr, | |
1099 | hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); | |
1100 | ||
1101 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); | |
1102 | ||
1103 | out: | |
16a41423 ML |
1104 | if (hard_iface) |
1105 | batadv_hardif_free_ref(hard_iface); | |
cb1c92ec SW |
1106 | return 0; |
1107 | } | |
1108 | ||
56303d34 SE |
1109 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
1110 | int max_if_num) | |
c6c8fea2 | 1111 | { |
56303d34 | 1112 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 1113 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 1114 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1115 | struct hlist_head *head; |
56303d34 | 1116 | struct batadv_orig_node *orig_node; |
6b5e971a | 1117 | u32 i; |
c90681b8 | 1118 | int ret; |
c6c8fea2 SE |
1119 | |
1120 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1121 | * if_num |
1122 | */ | |
c6c8fea2 SE |
1123 | for (i = 0; i < hash->size; i++) { |
1124 | head = &hash->table[i]; | |
1125 | ||
fb778ea1 | 1126 | rcu_read_lock(); |
b67bfe0d | 1127 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1128 | ret = 0; |
1129 | if (bao->bat_orig_add_if) | |
1130 | ret = bao->bat_orig_add_if(orig_node, | |
1131 | max_if_num); | |
5346c35e | 1132 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1133 | goto err; |
1134 | } | |
fb778ea1 | 1135 | rcu_read_unlock(); |
c6c8fea2 SE |
1136 | } |
1137 | ||
c6c8fea2 SE |
1138 | return 0; |
1139 | ||
1140 | err: | |
fb778ea1 | 1141 | rcu_read_unlock(); |
c6c8fea2 SE |
1142 | return -ENOMEM; |
1143 | } | |
1144 | ||
56303d34 SE |
1145 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
1146 | int max_if_num) | |
c6c8fea2 | 1147 | { |
56303d34 | 1148 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 1149 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1150 | struct hlist_head *head; |
56303d34 SE |
1151 | struct batadv_hard_iface *hard_iface_tmp; |
1152 | struct batadv_orig_node *orig_node; | |
d0015fdd | 1153 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
6b5e971a | 1154 | u32 i; |
c90681b8 | 1155 | int ret; |
c6c8fea2 SE |
1156 | |
1157 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1158 | * if_num |
1159 | */ | |
c6c8fea2 SE |
1160 | for (i = 0; i < hash->size; i++) { |
1161 | head = &hash->table[i]; | |
1162 | ||
fb778ea1 | 1163 | rcu_read_lock(); |
b67bfe0d | 1164 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1165 | ret = 0; |
1166 | if (bao->bat_orig_del_if) | |
1167 | ret = bao->bat_orig_del_if(orig_node, | |
1168 | max_if_num, | |
1169 | hard_iface->if_num); | |
5346c35e | 1170 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1171 | goto err; |
1172 | } | |
fb778ea1 | 1173 | rcu_read_unlock(); |
c6c8fea2 SE |
1174 | } |
1175 | ||
1176 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1177 | rcu_read_lock(); | |
3193e8fd | 1178 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1179 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1180 | continue; |
1181 | ||
e6c10f43 | 1182 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1183 | continue; |
1184 | ||
e6c10f43 | 1185 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1186 | continue; |
1187 | ||
e6c10f43 ML |
1188 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1189 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1190 | } |
1191 | rcu_read_unlock(); | |
1192 | ||
e6c10f43 | 1193 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1194 | return 0; |
1195 | ||
1196 | err: | |
fb778ea1 | 1197 | rcu_read_unlock(); |
c6c8fea2 SE |
1198 | return -ENOMEM; |
1199 | } |