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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, | |
0538f759 AQ |
455 | const uint8_t *neigh_addr, |
456 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 457 | { |
56303d34 | 458 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 459 | |
704509b8 | 460 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 461 | if (!neigh_node) |
7ae8b285 | 462 | goto out; |
c6c8fea2 | 463 | |
9591a79f | 464 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
465 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
466 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 467 | |
8fdd0153 | 468 | ether_addr_copy(neigh_node->addr, neigh_addr); |
0538f759 AQ |
469 | neigh_node->if_incoming = hard_iface; |
470 | neigh_node->orig_node = orig_node; | |
471 | ||
1605d0d6 ML |
472 | /* extra reference for return */ |
473 | atomic_set(&neigh_node->refcount, 2); | |
c6c8fea2 | 474 | |
7ae8b285 | 475 | out: |
c6c8fea2 SE |
476 | return neigh_node; |
477 | } | |
478 | ||
08bf0ed2 AQ |
479 | /** |
480 | * batadv_neigh_node_get - retrieve a neighbour from the list | |
481 | * @orig_node: originator which the neighbour belongs to | |
482 | * @hard_iface: the interface where this neighbour is connected to | |
483 | * @addr: the address of the neighbour | |
484 | * | |
485 | * Looks for and possibly returns a neighbour belonging to this originator list | |
486 | * which is connected through the provided hard interface. | |
487 | * Returns NULL if the neighbour is not found. | |
488 | */ | |
489 | struct batadv_neigh_node * | |
490 | batadv_neigh_node_get(const struct batadv_orig_node *orig_node, | |
491 | const struct batadv_hard_iface *hard_iface, | |
492 | const uint8_t *addr) | |
493 | { | |
494 | struct batadv_neigh_node *tmp_neigh_node, *res = NULL; | |
495 | ||
496 | rcu_read_lock(); | |
497 | hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { | |
498 | if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) | |
499 | continue; | |
500 | ||
501 | if (tmp_neigh_node->if_incoming != hard_iface) | |
502 | continue; | |
503 | ||
504 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) | |
505 | continue; | |
506 | ||
507 | res = tmp_neigh_node; | |
508 | break; | |
509 | } | |
510 | rcu_read_unlock(); | |
511 | ||
512 | return res; | |
513 | } | |
514 | ||
7351a482 SW |
515 | /** |
516 | * batadv_orig_ifinfo_free_rcu - free the orig_ifinfo object | |
517 | * @rcu: rcu pointer of the orig_ifinfo object | |
518 | */ | |
519 | static void batadv_orig_ifinfo_free_rcu(struct rcu_head *rcu) | |
520 | { | |
521 | struct batadv_orig_ifinfo *orig_ifinfo; | |
000c8dff | 522 | struct batadv_neigh_node *router; |
7351a482 SW |
523 | |
524 | orig_ifinfo = container_of(rcu, struct batadv_orig_ifinfo, rcu); | |
525 | ||
526 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) | |
527 | batadv_hardif_free_ref_now(orig_ifinfo->if_outgoing); | |
528 | ||
000c8dff SW |
529 | /* this is the last reference to this object */ |
530 | router = rcu_dereference_protected(orig_ifinfo->router, true); | |
531 | if (router) | |
532 | batadv_neigh_node_free_ref_now(router); | |
7351a482 SW |
533 | kfree(orig_ifinfo); |
534 | } | |
535 | ||
536 | /** | |
537 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free | |
538 | * the orig_ifinfo (without rcu callback) | |
539 | * @orig_ifinfo: the orig_ifinfo object to release | |
540 | */ | |
541 | static void | |
542 | batadv_orig_ifinfo_free_ref_now(struct batadv_orig_ifinfo *orig_ifinfo) | |
543 | { | |
544 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
545 | batadv_orig_ifinfo_free_rcu(&orig_ifinfo->rcu); | |
546 | } | |
547 | ||
548 | /** | |
549 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free | |
550 | * the orig_ifinfo | |
551 | * @orig_ifinfo: the orig_ifinfo object to release | |
552 | */ | |
553 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) | |
554 | { | |
555 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
556 | call_rcu(&orig_ifinfo->rcu, batadv_orig_ifinfo_free_rcu); | |
557 | } | |
558 | ||
03fc7f86 | 559 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 560 | { |
b67bfe0d | 561 | struct hlist_node *node_tmp; |
f6c8b711 | 562 | struct batadv_neigh_node *neigh_node; |
56303d34 | 563 | struct batadv_orig_node *orig_node; |
7351a482 | 564 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 565 | |
56303d34 | 566 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); |
c6c8fea2 | 567 | |
f987ed6e ML |
568 | spin_lock_bh(&orig_node->neigh_list_lock); |
569 | ||
c6c8fea2 | 570 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 571 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 572 | &orig_node->neigh_list, list) { |
f987ed6e | 573 | hlist_del_rcu(&neigh_node->list); |
89652331 | 574 | batadv_neigh_node_free_ref_now(neigh_node); |
c6c8fea2 SE |
575 | } |
576 | ||
7351a482 SW |
577 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
578 | &orig_node->ifinfo_list, list) { | |
579 | hlist_del_rcu(&orig_ifinfo->list); | |
580 | batadv_orig_ifinfo_free_ref_now(orig_ifinfo); | |
581 | } | |
f987ed6e ML |
582 | spin_unlock_bh(&orig_node->neigh_list_lock); |
583 | ||
60432d75 LL |
584 | batadv_mcast_purge_orig(orig_node); |
585 | ||
d56b1705 MH |
586 | /* Free nc_nodes */ |
587 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
588 | ||
610bfc6b MH |
589 | batadv_frag_purge_orig(orig_node, NULL); |
590 | ||
d0015fdd AQ |
591 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) |
592 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
593 | ||
a73105b8 | 594 | kfree(orig_node->tt_buff); |
c6c8fea2 SE |
595 | kfree(orig_node); |
596 | } | |
597 | ||
72822225 LL |
598 | /** |
599 | * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly | |
600 | * schedule an rcu callback for freeing it | |
601 | * @orig_node: the orig node to free | |
602 | */ | |
56303d34 | 603 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) |
7b36e8ee ML |
604 | { |
605 | if (atomic_dec_and_test(&orig_node->refcount)) | |
03fc7f86 | 606 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
7b36e8ee ML |
607 | } |
608 | ||
72822225 LL |
609 | /** |
610 | * batadv_orig_node_free_ref_now - decrement the orig node refcounter and | |
611 | * possibly free it (without rcu callback) | |
612 | * @orig_node: the orig node to free | |
613 | */ | |
614 | void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node) | |
615 | { | |
616 | if (atomic_dec_and_test(&orig_node->refcount)) | |
617 | batadv_orig_node_free_rcu(&orig_node->rcu); | |
618 | } | |
619 | ||
56303d34 | 620 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 621 | { |
5bf74e9c | 622 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 623 | struct hlist_node *node_tmp; |
16b1aba8 | 624 | struct hlist_head *head; |
16b1aba8 | 625 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 626 | struct batadv_orig_node *orig_node; |
c90681b8 | 627 | uint32_t i; |
16b1aba8 ML |
628 | |
629 | if (!hash) | |
c6c8fea2 SE |
630 | return; |
631 | ||
632 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
633 | ||
c6c8fea2 | 634 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
635 | |
636 | for (i = 0; i < hash->size; i++) { | |
637 | head = &hash->table[i]; | |
638 | list_lock = &hash->list_locks[i]; | |
639 | ||
640 | spin_lock_bh(list_lock); | |
b67bfe0d | 641 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 642 | head, hash_entry) { |
b67bfe0d | 643 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 644 | batadv_orig_node_free_ref(orig_node); |
16b1aba8 ML |
645 | } |
646 | spin_unlock_bh(list_lock); | |
647 | } | |
648 | ||
1a8eaf07 | 649 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
650 | } |
651 | ||
bbad0a5e AQ |
652 | /** |
653 | * batadv_orig_node_new - creates a new orig_node | |
654 | * @bat_priv: the bat priv with all the soft interface information | |
655 | * @addr: the mac address of the originator | |
656 | * | |
657 | * Creates a new originator object and initialise all the generic fields. | |
658 | * The new object is not added to the originator list. | |
659 | * Returns the newly created object or NULL on failure. | |
9cfc7bd6 | 660 | */ |
bbad0a5e | 661 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
56303d34 | 662 | const uint8_t *addr) |
c6c8fea2 | 663 | { |
56303d34 | 664 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 665 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 666 | unsigned long reset_time; |
bbad0a5e | 667 | int i; |
c6c8fea2 | 668 | |
39c75a51 SE |
669 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
670 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 671 | |
704509b8 | 672 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
673 | if (!orig_node) |
674 | return NULL; | |
675 | ||
9591a79f | 676 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
7ea7b4a1 | 677 | INIT_LIST_HEAD(&orig_node->vlan_list); |
7351a482 | 678 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 679 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 680 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 681 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 682 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 683 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 684 | |
d56b1705 MH |
685 | batadv_nc_init_orig(orig_node); |
686 | ||
7b36e8ee ML |
687 | /* extra reference for return */ |
688 | atomic_set(&orig_node->refcount, 2); | |
c6c8fea2 | 689 | |
16b1aba8 | 690 | orig_node->bat_priv = bat_priv; |
8fdd0153 | 691 | ether_addr_copy(orig_node->orig, addr); |
785ea114 | 692 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 693 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 694 | orig_node->tt_buff = NULL; |
a73105b8 | 695 | orig_node->tt_buff_len = 0; |
2c667a33 | 696 | orig_node->last_seen = jiffies; |
42d0b044 SE |
697 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
698 | orig_node->bcast_seqno_reset = reset_time; | |
8a4023c5 | 699 | |
60432d75 LL |
700 | #ifdef CONFIG_BATMAN_ADV_MCAST |
701 | orig_node->mcast_flags = BATADV_NO_FLAGS; | |
8a4023c5 LL |
702 | INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node); |
703 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node); | |
704 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node); | |
705 | spin_lock_init(&orig_node->mcast_handler_lock); | |
60432d75 | 706 | #endif |
c6c8fea2 | 707 | |
7ea7b4a1 AQ |
708 | /* create a vlan object for the "untagged" LAN */ |
709 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
710 | if (!vlan) | |
711 | goto free_orig_node; | |
712 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
713 | * Immediately release vlan since it is not needed anymore in this | |
714 | * context | |
715 | */ | |
716 | batadv_orig_node_vlan_free_ref(vlan); | |
717 | ||
610bfc6b MH |
718 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
719 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
720 | spin_lock_init(&orig_node->fragments[i].lock); | |
721 | orig_node->fragments[i].size = 0; | |
722 | } | |
723 | ||
c6c8fea2 | 724 | return orig_node; |
c6c8fea2 SE |
725 | free_orig_node: |
726 | kfree(orig_node); | |
727 | return NULL; | |
728 | } | |
729 | ||
709de13f SW |
730 | /** |
731 | * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor | |
732 | * @bat_priv: the bat priv with all the soft interface information | |
733 | * @neigh: orig node which is to be checked | |
734 | */ | |
735 | static void | |
736 | batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, | |
737 | struct batadv_neigh_node *neigh) | |
738 | { | |
739 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
740 | struct batadv_hard_iface *if_outgoing; | |
741 | struct hlist_node *node_tmp; | |
742 | ||
743 | spin_lock_bh(&neigh->ifinfo_lock); | |
744 | ||
745 | /* for all ifinfo objects for this neighinator */ | |
746 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
747 | &neigh->ifinfo_list, list) { | |
748 | if_outgoing = neigh_ifinfo->if_outgoing; | |
749 | ||
750 | /* always keep the default interface */ | |
751 | if (if_outgoing == BATADV_IF_DEFAULT) | |
752 | continue; | |
753 | ||
754 | /* don't purge if the interface is not (going) down */ | |
755 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
756 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
757 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
758 | continue; | |
759 | ||
760 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
761 | "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", | |
762 | neigh->addr, if_outgoing->net_dev->name); | |
763 | ||
764 | hlist_del_rcu(&neigh_ifinfo->list); | |
765 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
766 | } | |
767 | ||
768 | spin_unlock_bh(&neigh->ifinfo_lock); | |
769 | } | |
770 | ||
7351a482 SW |
771 | /** |
772 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
773 | * @bat_priv: the bat priv with all the soft interface information | |
774 | * @orig_node: orig node which is to be checked | |
775 | * | |
776 | * Returns true if any ifinfo entry was purged, false otherwise. | |
777 | */ | |
778 | static bool | |
779 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
780 | struct batadv_orig_node *orig_node) | |
781 | { | |
782 | struct batadv_orig_ifinfo *orig_ifinfo; | |
783 | struct batadv_hard_iface *if_outgoing; | |
784 | struct hlist_node *node_tmp; | |
785 | bool ifinfo_purged = false; | |
786 | ||
787 | spin_lock_bh(&orig_node->neigh_list_lock); | |
788 | ||
789 | /* for all ifinfo objects for this originator */ | |
790 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
791 | &orig_node->ifinfo_list, list) { | |
792 | if_outgoing = orig_ifinfo->if_outgoing; | |
793 | ||
794 | /* always keep the default interface */ | |
795 | if (if_outgoing == BATADV_IF_DEFAULT) | |
796 | continue; | |
797 | ||
798 | /* don't purge if the interface is not (going) down */ | |
799 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
800 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
801 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
802 | continue; | |
803 | ||
804 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
805 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
806 | orig_node->orig, if_outgoing->net_dev->name); | |
807 | ||
808 | ifinfo_purged = true; | |
809 | ||
810 | hlist_del_rcu(&orig_ifinfo->list); | |
811 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
f3b3d901 SW |
812 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
813 | orig_node->last_bonding_candidate = NULL; | |
814 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
815 | } | |
7351a482 SW |
816 | } |
817 | ||
818 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
819 | ||
820 | return ifinfo_purged; | |
821 | } | |
822 | ||
89652331 SW |
823 | /** |
824 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
825 | * @bat_priv: the bat priv with all the soft interface information | |
826 | * @orig_node: orig node which is to be checked | |
827 | * | |
828 | * Returns true if any neighbor was purged, false otherwise | |
829 | */ | |
56303d34 SE |
830 | static bool |
831 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 832 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 833 | { |
b67bfe0d | 834 | struct hlist_node *node_tmp; |
56303d34 | 835 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 836 | bool neigh_purged = false; |
0b0094e0 | 837 | unsigned long last_seen; |
56303d34 | 838 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 839 | |
f987ed6e ML |
840 | spin_lock_bh(&orig_node->neigh_list_lock); |
841 | ||
c6c8fea2 | 842 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 843 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 844 | &orig_node->neigh_list, list) { |
1eda58bf SE |
845 | last_seen = neigh_node->last_seen; |
846 | if_incoming = neigh_node->if_incoming; | |
847 | ||
42d0b044 | 848 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
849 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
850 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
851 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
852 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
853 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
854 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 855 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
856 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
857 | orig_node->orig, neigh_node->addr, | |
858 | if_incoming->net_dev->name); | |
c6c8fea2 | 859 | else |
39c75a51 | 860 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
861 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
862 | orig_node->orig, neigh_node->addr, | |
863 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
864 | |
865 | neigh_purged = true; | |
9591a79f | 866 | |
f987ed6e | 867 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 868 | batadv_neigh_node_free_ref(neigh_node); |
709de13f SW |
869 | } else { |
870 | /* only necessary if not the whole neighbor is to be | |
871 | * deleted, but some interface has been removed. | |
872 | */ | |
873 | batadv_purge_neigh_ifinfo(bat_priv, neigh_node); | |
c6c8fea2 SE |
874 | } |
875 | } | |
f987ed6e ML |
876 | |
877 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
878 | return neigh_purged; |
879 | } | |
880 | ||
89652331 SW |
881 | /** |
882 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
883 | * @bat_priv: the bat priv with all the soft interface information | |
884 | * @orig_node: orig node which is to be checked | |
885 | * @if_outgoing: the interface for which the metric should be compared | |
886 | * | |
887 | * Returns the current best neighbor, with refcount increased. | |
888 | */ | |
889 | static struct batadv_neigh_node * | |
890 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
891 | struct batadv_orig_node *orig_node, | |
892 | struct batadv_hard_iface *if_outgoing) | |
893 | { | |
894 | struct batadv_neigh_node *best = NULL, *neigh; | |
895 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
896 | ||
897 | rcu_read_lock(); | |
898 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
899 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
900 | best, if_outgoing) <= 0)) | |
901 | continue; | |
902 | ||
903 | if (!atomic_inc_not_zero(&neigh->refcount)) | |
904 | continue; | |
905 | ||
906 | if (best) | |
907 | batadv_neigh_node_free_ref(best); | |
908 | ||
909 | best = neigh; | |
910 | } | |
911 | rcu_read_unlock(); | |
912 | ||
913 | return best; | |
914 | } | |
915 | ||
7351a482 SW |
916 | /** |
917 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
918 | * @bat_priv: the bat priv with all the soft interface information | |
919 | * @orig_node: orig node which is to be checked | |
920 | * | |
921 | * This function checks if the orig_node or substructures of it have become | |
922 | * obsolete, and purges this information if that's the case. | |
923 | * | |
924 | * Returns true if the orig_node is to be removed, false otherwise. | |
925 | */ | |
56303d34 SE |
926 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
927 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 928 | { |
56303d34 | 929 | struct batadv_neigh_node *best_neigh_node; |
7351a482 | 930 | struct batadv_hard_iface *hard_iface; |
7b955a9f | 931 | bool changed_ifinfo, changed_neigh; |
c6c8fea2 | 932 | |
42d0b044 SE |
933 | if (batadv_has_timed_out(orig_node->last_seen, |
934 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 935 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
936 | "Originator timeout: originator %pM, last_seen %u\n", |
937 | orig_node->orig, | |
938 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 939 | return true; |
c6c8fea2 | 940 | } |
7b955a9f SW |
941 | changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
942 | changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); | |
7351a482 | 943 | |
7b955a9f | 944 | if (!changed_ifinfo && !changed_neigh) |
89652331 SW |
945 | return false; |
946 | ||
7351a482 | 947 | /* first for NULL ... */ |
89652331 SW |
948 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
949 | BATADV_IF_DEFAULT); | |
7351a482 SW |
950 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
951 | best_neigh_node); | |
89652331 SW |
952 | if (best_neigh_node) |
953 | batadv_neigh_node_free_ref(best_neigh_node); | |
c6c8fea2 | 954 | |
7351a482 SW |
955 | /* ... then for all other interfaces. */ |
956 | rcu_read_lock(); | |
957 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
958 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
959 | continue; | |
960 | ||
961 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
962 | continue; | |
963 | ||
964 | best_neigh_node = batadv_find_best_neighbor(bat_priv, | |
965 | orig_node, | |
966 | hard_iface); | |
967 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
968 | best_neigh_node); | |
969 | if (best_neigh_node) | |
970 | batadv_neigh_node_free_ref(best_neigh_node); | |
971 | } | |
972 | rcu_read_unlock(); | |
973 | ||
c6c8fea2 SE |
974 | return false; |
975 | } | |
976 | ||
56303d34 | 977 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 978 | { |
5bf74e9c | 979 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 980 | struct hlist_node *node_tmp; |
c6c8fea2 | 981 | struct hlist_head *head; |
fb778ea1 | 982 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 983 | struct batadv_orig_node *orig_node; |
c90681b8 | 984 | uint32_t i; |
c6c8fea2 SE |
985 | |
986 | if (!hash) | |
987 | return; | |
988 | ||
c6c8fea2 SE |
989 | /* for all origins... */ |
990 | for (i = 0; i < hash->size; i++) { | |
991 | head = &hash->table[i]; | |
fb778ea1 | 992 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 993 | |
fb778ea1 | 994 | spin_lock_bh(list_lock); |
b67bfe0d | 995 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 996 | head, hash_entry) { |
03fc7f86 | 997 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 998 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 999 | hlist_del_rcu(&orig_node->hash_entry); |
9d31b3ce LL |
1000 | batadv_tt_global_del_orig(orig_node->bat_priv, |
1001 | orig_node, -1, | |
1002 | "originator timed out"); | |
7d211efc | 1003 | batadv_orig_node_free_ref(orig_node); |
fb778ea1 | 1004 | continue; |
c6c8fea2 | 1005 | } |
610bfc6b MH |
1006 | |
1007 | batadv_frag_purge_orig(orig_node, | |
1008 | batadv_frag_check_entry); | |
c6c8fea2 | 1009 | } |
fb778ea1 | 1010 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
1011 | } |
1012 | ||
7cf06bc6 SE |
1013 | batadv_gw_node_purge(bat_priv); |
1014 | batadv_gw_election(bat_priv); | |
c6c8fea2 SE |
1015 | } |
1016 | ||
03fc7f86 | 1017 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 1018 | { |
56303d34 SE |
1019 | struct delayed_work *delayed_work; |
1020 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1021 | |
56303d34 SE |
1022 | delayed_work = container_of(work, struct delayed_work, work); |
1023 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 1024 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
1025 | queue_delayed_work(batadv_event_workqueue, |
1026 | &bat_priv->orig_work, | |
1027 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
1028 | } |
1029 | ||
56303d34 | 1030 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 1031 | { |
03fc7f86 | 1032 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
1033 | } |
1034 | ||
7d211efc | 1035 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1036 | { |
1037 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1038 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 1039 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 1040 | |
30da63a6 ML |
1041 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1042 | if (!primary_if) | |
737a2a22 | 1043 | return 0; |
c6c8fea2 | 1044 | |
737a2a22 | 1045 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 1046 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
1047 | primary_if->net_dev->dev_addr, net_dev->name, |
1048 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 1049 | |
737a2a22 | 1050 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 1051 | |
737a2a22 AQ |
1052 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
1053 | seq_puts(seq, | |
1054 | "No printing function for this routing protocol\n"); | |
1055 | return 0; | |
c6c8fea2 SE |
1056 | } |
1057 | ||
cb1c92ec SW |
1058 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, |
1059 | BATADV_IF_DEFAULT); | |
c6c8fea2 | 1060 | |
30da63a6 | 1061 | return 0; |
c6c8fea2 SE |
1062 | } |
1063 | ||
cb1c92ec SW |
1064 | /** |
1065 | * batadv_orig_hardif_seq_print_text - writes originator infos for a specific | |
1066 | * outgoing interface | |
1067 | * @seq: debugfs table seq_file struct | |
1068 | * @offset: not used | |
1069 | * | |
1070 | * Returns 0 | |
1071 | */ | |
1072 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) | |
1073 | { | |
1074 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1075 | struct batadv_hard_iface *hard_iface; | |
1076 | struct batadv_priv *bat_priv; | |
1077 | ||
1078 | hard_iface = batadv_hardif_get_by_netdev(net_dev); | |
1079 | ||
1080 | if (!hard_iface || !hard_iface->soft_iface) { | |
1081 | seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); | |
1082 | goto out; | |
1083 | } | |
1084 | ||
1085 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
1086 | if (!bat_priv->bat_algo_ops->bat_orig_print) { | |
1087 | seq_puts(seq, | |
1088 | "No printing function for this routing protocol\n"); | |
1089 | goto out; | |
1090 | } | |
1091 | ||
1092 | if (hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1093 | seq_puts(seq, "Interface not active\n"); | |
1094 | goto out; | |
1095 | } | |
1096 | ||
1097 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", | |
1098 | BATADV_SOURCE_VERSION, hard_iface->net_dev->name, | |
1099 | hard_iface->net_dev->dev_addr, | |
1100 | hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); | |
1101 | ||
1102 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); | |
1103 | ||
1104 | out: | |
16a41423 ML |
1105 | if (hard_iface) |
1106 | batadv_hardif_free_ref(hard_iface); | |
cb1c92ec SW |
1107 | return 0; |
1108 | } | |
1109 | ||
56303d34 SE |
1110 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
1111 | int max_if_num) | |
c6c8fea2 | 1112 | { |
56303d34 | 1113 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 1114 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 1115 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1116 | struct hlist_head *head; |
56303d34 | 1117 | struct batadv_orig_node *orig_node; |
c90681b8 AQ |
1118 | uint32_t i; |
1119 | int ret; | |
c6c8fea2 SE |
1120 | |
1121 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1122 | * if_num |
1123 | */ | |
c6c8fea2 SE |
1124 | for (i = 0; i < hash->size; i++) { |
1125 | head = &hash->table[i]; | |
1126 | ||
fb778ea1 | 1127 | rcu_read_lock(); |
b67bfe0d | 1128 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1129 | ret = 0; |
1130 | if (bao->bat_orig_add_if) | |
1131 | ret = bao->bat_orig_add_if(orig_node, | |
1132 | max_if_num); | |
5346c35e | 1133 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1134 | goto err; |
1135 | } | |
fb778ea1 | 1136 | rcu_read_unlock(); |
c6c8fea2 SE |
1137 | } |
1138 | ||
c6c8fea2 SE |
1139 | return 0; |
1140 | ||
1141 | err: | |
fb778ea1 | 1142 | rcu_read_unlock(); |
c6c8fea2 SE |
1143 | return -ENOMEM; |
1144 | } | |
1145 | ||
56303d34 SE |
1146 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
1147 | int max_if_num) | |
c6c8fea2 | 1148 | { |
56303d34 | 1149 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 1150 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1151 | struct hlist_head *head; |
56303d34 SE |
1152 | struct batadv_hard_iface *hard_iface_tmp; |
1153 | struct batadv_orig_node *orig_node; | |
d0015fdd | 1154 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
c90681b8 AQ |
1155 | uint32_t i; |
1156 | int ret; | |
c6c8fea2 SE |
1157 | |
1158 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1159 | * if_num |
1160 | */ | |
c6c8fea2 SE |
1161 | for (i = 0; i < hash->size; i++) { |
1162 | head = &hash->table[i]; | |
1163 | ||
fb778ea1 | 1164 | rcu_read_lock(); |
b67bfe0d | 1165 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1166 | ret = 0; |
1167 | if (bao->bat_orig_del_if) | |
1168 | ret = bao->bat_orig_del_if(orig_node, | |
1169 | max_if_num, | |
1170 | hard_iface->if_num); | |
5346c35e | 1171 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1172 | goto err; |
1173 | } | |
fb778ea1 | 1174 | rcu_read_unlock(); |
c6c8fea2 SE |
1175 | } |
1176 | ||
1177 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1178 | rcu_read_lock(); | |
3193e8fd | 1179 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1180 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1181 | continue; |
1182 | ||
e6c10f43 | 1183 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1184 | continue; |
1185 | ||
e6c10f43 | 1186 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1187 | continue; |
1188 | ||
e6c10f43 ML |
1189 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1190 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1191 | } |
1192 | rcu_read_unlock(); | |
1193 | ||
e6c10f43 | 1194 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1195 | return 0; |
1196 | ||
1197 | err: | |
fb778ea1 | 1198 | rcu_read_unlock(); |
c6c8fea2 SE |
1199 | return -ENOMEM; |
1200 | } |