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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> | |
d0fa4f3f | 29 | #include <linux/rculist.h> |
1e2c2a4f SE |
30 | #include <linux/seq_file.h> |
31 | #include <linux/slab.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/workqueue.h> | |
34 | ||
785ea114 | 35 | #include "distributed-arp-table.h" |
1e2c2a4f | 36 | #include "fragmentation.h" |
c6c8fea2 SE |
37 | #include "gateway_client.h" |
38 | #include "hard-interface.h" | |
1e2c2a4f | 39 | #include "hash.h" |
60432d75 | 40 | #include "multicast.h" |
1e2c2a4f SE |
41 | #include "network-coding.h" |
42 | #include "routing.h" | |
43 | #include "translation-table.h" | |
c6c8fea2 | 44 | |
dec05074 AQ |
45 | /* hash class keys */ |
46 | static struct lock_class_key batadv_orig_hash_lock_class_key; | |
47 | ||
03fc7f86 | 48 | static void batadv_purge_orig(struct work_struct *work); |
c6c8fea2 | 49 | |
b8e2dd13 | 50 | /* returns 1 if they are the same originator */ |
bbad0a5e | 51 | int batadv_compare_orig(const struct hlist_node *node, const void *data2) |
b8e2dd13 | 52 | { |
56303d34 SE |
53 | const void *data1 = container_of(node, struct batadv_orig_node, |
54 | hash_entry); | |
b8e2dd13 | 55 | |
323813ed | 56 | return batadv_compare_eth(data1, data2); |
b8e2dd13 SE |
57 | } |
58 | ||
7ea7b4a1 AQ |
59 | /** |
60 | * batadv_orig_node_vlan_get - get an orig_node_vlan object | |
61 | * @orig_node: the originator serving the VLAN | |
62 | * @vid: the VLAN identifier | |
63 | * | |
64 | * Returns the vlan object identified by vid and belonging to orig_node or NULL | |
65 | * if it does not exist. | |
66 | */ | |
67 | struct batadv_orig_node_vlan * | |
68 | batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, | |
69 | unsigned short vid) | |
70 | { | |
71 | struct batadv_orig_node_vlan *vlan = NULL, *tmp; | |
72 | ||
73 | rcu_read_lock(); | |
d0fa4f3f | 74 | hlist_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
75 | if (tmp->vid != vid) |
76 | continue; | |
77 | ||
78 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
79 | continue; | |
80 | ||
81 | vlan = tmp; | |
82 | ||
83 | break; | |
84 | } | |
85 | rcu_read_unlock(); | |
86 | ||
87 | return vlan; | |
88 | } | |
89 | ||
90 | /** | |
91 | * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan | |
92 | * object | |
93 | * @orig_node: the originator serving the VLAN | |
94 | * @vid: the VLAN identifier | |
95 | * | |
96 | * Returns NULL in case of failure or the vlan object identified by vid and | |
97 | * belonging to orig_node otherwise. The object is created and added to the list | |
98 | * if it does not exist. | |
99 | * | |
100 | * The object is returned with refcounter increased by 1. | |
101 | */ | |
102 | struct batadv_orig_node_vlan * | |
103 | batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, | |
104 | unsigned short vid) | |
105 | { | |
106 | struct batadv_orig_node_vlan *vlan; | |
107 | ||
108 | spin_lock_bh(&orig_node->vlan_list_lock); | |
109 | ||
110 | /* first look if an object for this vid already exists */ | |
111 | vlan = batadv_orig_node_vlan_get(orig_node, vid); | |
112 | if (vlan) | |
113 | goto out; | |
114 | ||
115 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
116 | if (!vlan) | |
117 | goto out; | |
118 | ||
119 | atomic_set(&vlan->refcount, 2); | |
120 | vlan->vid = vid; | |
121 | ||
d0fa4f3f | 122 | hlist_add_head_rcu(&vlan->list, &orig_node->vlan_list); |
7ea7b4a1 AQ |
123 | |
124 | out: | |
125 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
126 | ||
127 | return vlan; | |
128 | } | |
129 | ||
130 | /** | |
131 | * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free | |
132 | * the originator-vlan object | |
133 | * @orig_vlan: the originator-vlan object to release | |
134 | */ | |
135 | void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan) | |
136 | { | |
137 | if (atomic_dec_and_test(&orig_vlan->refcount)) | |
138 | kfree_rcu(orig_vlan, rcu); | |
139 | } | |
140 | ||
56303d34 | 141 | int batadv_originator_init(struct batadv_priv *bat_priv) |
c6c8fea2 SE |
142 | { |
143 | if (bat_priv->orig_hash) | |
5346c35e | 144 | return 0; |
c6c8fea2 | 145 | |
1a8eaf07 | 146 | bat_priv->orig_hash = batadv_hash_new(1024); |
c6c8fea2 SE |
147 | |
148 | if (!bat_priv->orig_hash) | |
149 | goto err; | |
150 | ||
dec05074 AQ |
151 | batadv_hash_set_lock_class(bat_priv->orig_hash, |
152 | &batadv_orig_hash_lock_class_key); | |
153 | ||
72414442 AQ |
154 | INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig); |
155 | queue_delayed_work(batadv_event_workqueue, | |
156 | &bat_priv->orig_work, | |
157 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
158 | ||
5346c35e | 159 | return 0; |
c6c8fea2 SE |
160 | |
161 | err: | |
5346c35e | 162 | return -ENOMEM; |
c6c8fea2 SE |
163 | } |
164 | ||
89652331 SW |
165 | /** |
166 | * batadv_neigh_ifinfo_free_rcu - free the neigh_ifinfo object | |
167 | * @rcu: rcu pointer of the neigh_ifinfo object | |
168 | */ | |
169 | static void batadv_neigh_ifinfo_free_rcu(struct rcu_head *rcu) | |
170 | { | |
171 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
172 | ||
173 | neigh_ifinfo = container_of(rcu, struct batadv_neigh_ifinfo, rcu); | |
174 | ||
175 | if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) | |
176 | batadv_hardif_free_ref_now(neigh_ifinfo->if_outgoing); | |
177 | ||
178 | kfree(neigh_ifinfo); | |
179 | } | |
180 | ||
181 | /** | |
182 | * batadv_neigh_ifinfo_free_now - decrement the refcounter and possibly free | |
183 | * the neigh_ifinfo (without rcu callback) | |
184 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
185 | */ | |
186 | static void | |
187 | batadv_neigh_ifinfo_free_ref_now(struct batadv_neigh_ifinfo *neigh_ifinfo) | |
188 | { | |
189 | if (atomic_dec_and_test(&neigh_ifinfo->refcount)) | |
190 | batadv_neigh_ifinfo_free_rcu(&neigh_ifinfo->rcu); | |
191 | } | |
192 | ||
193 | /** | |
194 | * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly free | |
195 | * the neigh_ifinfo | |
196 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
197 | */ | |
198 | void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo) | |
199 | { | |
200 | if (atomic_dec_and_test(&neigh_ifinfo->refcount)) | |
201 | call_rcu(&neigh_ifinfo->rcu, batadv_neigh_ifinfo_free_rcu); | |
202 | } | |
203 | ||
204 | /** | |
205 | * batadv_neigh_node_free_rcu - free the neigh_node | |
206 | * @rcu: rcu pointer of the neigh_node | |
207 | */ | |
208 | static void batadv_neigh_node_free_rcu(struct rcu_head *rcu) | |
209 | { | |
210 | struct hlist_node *node_tmp; | |
211 | struct batadv_neigh_node *neigh_node; | |
212 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
bcef1f3c | 213 | struct batadv_algo_ops *bao; |
89652331 SW |
214 | |
215 | neigh_node = container_of(rcu, struct batadv_neigh_node, rcu); | |
bcef1f3c | 216 | bao = neigh_node->orig_node->bat_priv->bat_algo_ops; |
89652331 SW |
217 | |
218 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
219 | &neigh_node->ifinfo_list, list) { | |
220 | batadv_neigh_ifinfo_free_ref_now(neigh_ifinfo); | |
221 | } | |
bcef1f3c AQ |
222 | |
223 | if (bao->bat_neigh_free) | |
224 | bao->bat_neigh_free(neigh_node); | |
225 | ||
89652331 SW |
226 | batadv_hardif_free_ref_now(neigh_node->if_incoming); |
227 | ||
228 | kfree(neigh_node); | |
229 | } | |
230 | ||
231 | /** | |
232 | * batadv_neigh_node_free_ref_now - decrement the neighbors refcounter | |
233 | * and possibly free it (without rcu callback) | |
234 | * @neigh_node: neigh neighbor to free | |
235 | */ | |
236 | static void | |
237 | batadv_neigh_node_free_ref_now(struct batadv_neigh_node *neigh_node) | |
238 | { | |
239 | if (atomic_dec_and_test(&neigh_node->refcount)) | |
240 | batadv_neigh_node_free_rcu(&neigh_node->rcu); | |
241 | } | |
242 | ||
243 | /** | |
244 | * batadv_neigh_node_free_ref - decrement the neighbors refcounter | |
245 | * and possibly free it | |
246 | * @neigh_node: neigh neighbor to free | |
247 | */ | |
56303d34 | 248 | void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) |
a4c135c5 | 249 | { |
44524fcd | 250 | if (atomic_dec_and_test(&neigh_node->refcount)) |
89652331 | 251 | call_rcu(&neigh_node->rcu, batadv_neigh_node_free_rcu); |
a4c135c5 SW |
252 | } |
253 | ||
7351a482 SW |
254 | /** |
255 | * batadv_orig_node_get_router - router to the originator depending on iface | |
256 | * @orig_node: the orig node for the router | |
257 | * @if_outgoing: the interface where the payload packet has been received or | |
258 | * the OGM should be sent to | |
259 | * | |
260 | * Returns the neighbor which should be router for this orig_node/iface. | |
261 | * | |
262 | * The object is returned with refcounter increased by 1. | |
263 | */ | |
56303d34 | 264 | struct batadv_neigh_node * |
7351a482 SW |
265 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
266 | const struct batadv_hard_iface *if_outgoing) | |
e1a5382f | 267 | { |
7351a482 SW |
268 | struct batadv_orig_ifinfo *orig_ifinfo; |
269 | struct batadv_neigh_node *router = NULL; | |
e1a5382f LL |
270 | |
271 | rcu_read_lock(); | |
7351a482 SW |
272 | hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { |
273 | if (orig_ifinfo->if_outgoing != if_outgoing) | |
274 | continue; | |
275 | ||
276 | router = rcu_dereference(orig_ifinfo->router); | |
277 | break; | |
278 | } | |
e1a5382f LL |
279 | |
280 | if (router && !atomic_inc_not_zero(&router->refcount)) | |
281 | router = NULL; | |
282 | ||
283 | rcu_read_unlock(); | |
284 | return router; | |
285 | } | |
286 | ||
7351a482 SW |
287 | /** |
288 | * batadv_orig_ifinfo_get - find the ifinfo from an orig_node | |
289 | * @orig_node: the orig node to be queried | |
290 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
291 | * | |
292 | * Returns the requested orig_ifinfo or NULL if not found. | |
293 | * | |
294 | * The object is returned with refcounter increased by 1. | |
295 | */ | |
296 | struct batadv_orig_ifinfo * | |
297 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
298 | struct batadv_hard_iface *if_outgoing) | |
299 | { | |
300 | struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; | |
301 | ||
302 | rcu_read_lock(); | |
303 | hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, | |
304 | list) { | |
305 | if (tmp->if_outgoing != if_outgoing) | |
306 | continue; | |
307 | ||
308 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
309 | continue; | |
310 | ||
311 | orig_ifinfo = tmp; | |
312 | break; | |
313 | } | |
314 | rcu_read_unlock(); | |
315 | ||
316 | return orig_ifinfo; | |
317 | } | |
318 | ||
319 | /** | |
320 | * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object | |
321 | * @orig_node: the orig node to be queried | |
322 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
323 | * | |
324 | * Returns NULL in case of failure or the orig_ifinfo object for the if_outgoing | |
325 | * interface otherwise. The object is created and added to the list | |
326 | * if it does not exist. | |
327 | * | |
328 | * The object is returned with refcounter increased by 1. | |
329 | */ | |
330 | struct batadv_orig_ifinfo * | |
331 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
332 | struct batadv_hard_iface *if_outgoing) | |
333 | { | |
334 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; | |
335 | unsigned long reset_time; | |
336 | ||
337 | spin_lock_bh(&orig_node->neigh_list_lock); | |
338 | ||
339 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
340 | if (orig_ifinfo) | |
341 | goto out; | |
342 | ||
343 | orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); | |
344 | if (!orig_ifinfo) | |
345 | goto out; | |
346 | ||
347 | if (if_outgoing != BATADV_IF_DEFAULT && | |
348 | !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
349 | kfree(orig_ifinfo); | |
350 | orig_ifinfo = NULL; | |
351 | goto out; | |
352 | } | |
353 | ||
354 | reset_time = jiffies - 1; | |
355 | reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); | |
356 | orig_ifinfo->batman_seqno_reset = reset_time; | |
357 | orig_ifinfo->if_outgoing = if_outgoing; | |
358 | INIT_HLIST_NODE(&orig_ifinfo->list); | |
359 | atomic_set(&orig_ifinfo->refcount, 2); | |
360 | hlist_add_head_rcu(&orig_ifinfo->list, | |
361 | &orig_node->ifinfo_list); | |
362 | out: | |
363 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
364 | return orig_ifinfo; | |
365 | } | |
366 | ||
89652331 SW |
367 | /** |
368 | * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node | |
369 | * @neigh_node: the neigh node to be queried | |
370 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
371 | * | |
372 | * The object is returned with refcounter increased by 1. | |
373 | * | |
374 | * Returns the requested neigh_ifinfo or NULL if not found | |
375 | */ | |
376 | struct batadv_neigh_ifinfo * | |
377 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
378 | struct batadv_hard_iface *if_outgoing) | |
379 | { | |
380 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, | |
381 | *tmp_neigh_ifinfo; | |
382 | ||
383 | rcu_read_lock(); | |
384 | hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, | |
385 | list) { | |
386 | if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) | |
387 | continue; | |
388 | ||
389 | if (!atomic_inc_not_zero(&tmp_neigh_ifinfo->refcount)) | |
390 | continue; | |
391 | ||
392 | neigh_ifinfo = tmp_neigh_ifinfo; | |
393 | break; | |
394 | } | |
395 | rcu_read_unlock(); | |
396 | ||
397 | return neigh_ifinfo; | |
398 | } | |
399 | ||
400 | /** | |
401 | * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object | |
402 | * @neigh_node: the neigh node to be queried | |
403 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
404 | * | |
405 | * Returns NULL in case of failure or the neigh_ifinfo object for the | |
406 | * if_outgoing interface otherwise. The object is created and added to the list | |
407 | * if it does not exist. | |
408 | * | |
409 | * The object is returned with refcounter increased by 1. | |
410 | */ | |
411 | struct batadv_neigh_ifinfo * | |
412 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
413 | struct batadv_hard_iface *if_outgoing) | |
414 | { | |
415 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
416 | ||
417 | spin_lock_bh(&neigh->ifinfo_lock); | |
418 | ||
419 | neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); | |
420 | if (neigh_ifinfo) | |
421 | goto out; | |
422 | ||
423 | neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); | |
424 | if (!neigh_ifinfo) | |
425 | goto out; | |
426 | ||
427 | if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
428 | kfree(neigh_ifinfo); | |
429 | neigh_ifinfo = NULL; | |
430 | goto out; | |
431 | } | |
432 | ||
433 | INIT_HLIST_NODE(&neigh_ifinfo->list); | |
434 | atomic_set(&neigh_ifinfo->refcount, 2); | |
435 | neigh_ifinfo->if_outgoing = if_outgoing; | |
436 | ||
437 | hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); | |
438 | ||
439 | out: | |
440 | spin_unlock_bh(&neigh->ifinfo_lock); | |
441 | ||
442 | return neigh_ifinfo; | |
443 | } | |
444 | ||
ed292663 ML |
445 | /** |
446 | * batadv_neigh_node_get - retrieve a neighbour from the list | |
447 | * @orig_node: originator which the neighbour belongs to | |
448 | * @hard_iface: the interface where this neighbour is connected to | |
449 | * @addr: the address of the neighbour | |
450 | * | |
451 | * Looks for and possibly returns a neighbour belonging to this originator list | |
452 | * which is connected through the provided hard interface. | |
453 | * Returns NULL if the neighbour is not found. | |
454 | */ | |
455 | static struct batadv_neigh_node * | |
456 | batadv_neigh_node_get(const struct batadv_orig_node *orig_node, | |
457 | const struct batadv_hard_iface *hard_iface, | |
458 | const u8 *addr) | |
459 | { | |
460 | struct batadv_neigh_node *tmp_neigh_node, *res = NULL; | |
461 | ||
462 | rcu_read_lock(); | |
463 | hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { | |
464 | if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) | |
465 | continue; | |
466 | ||
467 | if (tmp_neigh_node->if_incoming != hard_iface) | |
468 | continue; | |
469 | ||
470 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) | |
471 | continue; | |
472 | ||
473 | res = tmp_neigh_node; | |
474 | break; | |
475 | } | |
476 | rcu_read_unlock(); | |
477 | ||
478 | return res; | |
479 | } | |
480 | ||
0538f759 AQ |
481 | /** |
482 | * batadv_neigh_node_new - create and init a new neigh_node object | |
3f32f8a6 | 483 | * @orig_node: originator object representing the neighbour |
0538f759 AQ |
484 | * @hard_iface: the interface where the neighbour is connected to |
485 | * @neigh_addr: the mac address of the neighbour interface | |
0538f759 AQ |
486 | * |
487 | * Allocates a new neigh_node object and initialises all the generic fields. | |
488 | * Returns the new object or NULL on failure. | |
489 | */ | |
56303d34 | 490 | struct batadv_neigh_node * |
3f32f8a6 ML |
491 | batadv_neigh_node_new(struct batadv_orig_node *orig_node, |
492 | struct batadv_hard_iface *hard_iface, | |
493 | const u8 *neigh_addr) | |
c6c8fea2 | 494 | { |
56303d34 | 495 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 496 | |
741aa06b ML |
497 | neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr); |
498 | if (neigh_node) | |
499 | goto out; | |
500 | ||
704509b8 | 501 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 502 | if (!neigh_node) |
7ae8b285 | 503 | goto out; |
c6c8fea2 | 504 | |
f729dc70 ML |
505 | if (!atomic_inc_not_zero(&hard_iface->refcount)) { |
506 | kfree(neigh_node); | |
507 | neigh_node = NULL; | |
508 | goto out; | |
509 | } | |
510 | ||
9591a79f | 511 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
512 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
513 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 514 | |
8fdd0153 | 515 | ether_addr_copy(neigh_node->addr, neigh_addr); |
0538f759 AQ |
516 | neigh_node->if_incoming = hard_iface; |
517 | neigh_node->orig_node = orig_node; | |
518 | ||
1605d0d6 ML |
519 | /* extra reference for return */ |
520 | atomic_set(&neigh_node->refcount, 2); | |
c6c8fea2 | 521 | |
741aa06b ML |
522 | spin_lock_bh(&orig_node->neigh_list_lock); |
523 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); | |
524 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
525 | ||
526 | batadv_dbg(BATADV_DBG_BATMAN, orig_node->bat_priv, | |
527 | "Creating new neighbor %pM for orig_node %pM on interface %s\n", | |
528 | neigh_addr, orig_node->orig, hard_iface->net_dev->name); | |
529 | ||
7ae8b285 | 530 | out: |
c6c8fea2 SE |
531 | return neigh_node; |
532 | } | |
533 | ||
7351a482 SW |
534 | /** |
535 | * batadv_orig_ifinfo_free_rcu - free the orig_ifinfo object | |
536 | * @rcu: rcu pointer of the orig_ifinfo object | |
537 | */ | |
538 | static void batadv_orig_ifinfo_free_rcu(struct rcu_head *rcu) | |
539 | { | |
540 | struct batadv_orig_ifinfo *orig_ifinfo; | |
000c8dff | 541 | struct batadv_neigh_node *router; |
7351a482 SW |
542 | |
543 | orig_ifinfo = container_of(rcu, struct batadv_orig_ifinfo, rcu); | |
544 | ||
545 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) | |
546 | batadv_hardif_free_ref_now(orig_ifinfo->if_outgoing); | |
547 | ||
000c8dff SW |
548 | /* this is the last reference to this object */ |
549 | router = rcu_dereference_protected(orig_ifinfo->router, true); | |
550 | if (router) | |
551 | batadv_neigh_node_free_ref_now(router); | |
7351a482 SW |
552 | kfree(orig_ifinfo); |
553 | } | |
554 | ||
555 | /** | |
556 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free | |
557 | * the orig_ifinfo (without rcu callback) | |
558 | * @orig_ifinfo: the orig_ifinfo object to release | |
559 | */ | |
560 | static void | |
561 | batadv_orig_ifinfo_free_ref_now(struct batadv_orig_ifinfo *orig_ifinfo) | |
562 | { | |
563 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
564 | batadv_orig_ifinfo_free_rcu(&orig_ifinfo->rcu); | |
565 | } | |
566 | ||
567 | /** | |
568 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free | |
569 | * the orig_ifinfo | |
570 | * @orig_ifinfo: the orig_ifinfo object to release | |
571 | */ | |
572 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) | |
573 | { | |
574 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
575 | call_rcu(&orig_ifinfo->rcu, batadv_orig_ifinfo_free_rcu); | |
576 | } | |
577 | ||
03fc7f86 | 578 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 579 | { |
b67bfe0d | 580 | struct hlist_node *node_tmp; |
f6c8b711 | 581 | struct batadv_neigh_node *neigh_node; |
56303d34 | 582 | struct batadv_orig_node *orig_node; |
7351a482 | 583 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 584 | |
56303d34 | 585 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); |
c6c8fea2 | 586 | |
f987ed6e ML |
587 | spin_lock_bh(&orig_node->neigh_list_lock); |
588 | ||
c6c8fea2 | 589 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 590 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 591 | &orig_node->neigh_list, list) { |
f987ed6e | 592 | hlist_del_rcu(&neigh_node->list); |
89652331 | 593 | batadv_neigh_node_free_ref_now(neigh_node); |
c6c8fea2 SE |
594 | } |
595 | ||
7351a482 SW |
596 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
597 | &orig_node->ifinfo_list, list) { | |
598 | hlist_del_rcu(&orig_ifinfo->list); | |
599 | batadv_orig_ifinfo_free_ref_now(orig_ifinfo); | |
600 | } | |
f987ed6e ML |
601 | spin_unlock_bh(&orig_node->neigh_list_lock); |
602 | ||
60432d75 LL |
603 | batadv_mcast_purge_orig(orig_node); |
604 | ||
d56b1705 MH |
605 | /* Free nc_nodes */ |
606 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
607 | ||
610bfc6b MH |
608 | batadv_frag_purge_orig(orig_node, NULL); |
609 | ||
d0015fdd AQ |
610 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) |
611 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
612 | ||
a73105b8 | 613 | kfree(orig_node->tt_buff); |
c6c8fea2 SE |
614 | kfree(orig_node); |
615 | } | |
616 | ||
72822225 LL |
617 | /** |
618 | * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly | |
619 | * schedule an rcu callback for freeing it | |
620 | * @orig_node: the orig node to free | |
621 | */ | |
56303d34 | 622 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) |
7b36e8ee ML |
623 | { |
624 | if (atomic_dec_and_test(&orig_node->refcount)) | |
03fc7f86 | 625 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
7b36e8ee ML |
626 | } |
627 | ||
72822225 LL |
628 | /** |
629 | * batadv_orig_node_free_ref_now - decrement the orig node refcounter and | |
630 | * possibly free it (without rcu callback) | |
631 | * @orig_node: the orig node to free | |
632 | */ | |
633 | void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node) | |
634 | { | |
635 | if (atomic_dec_and_test(&orig_node->refcount)) | |
636 | batadv_orig_node_free_rcu(&orig_node->rcu); | |
637 | } | |
638 | ||
56303d34 | 639 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 640 | { |
5bf74e9c | 641 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 642 | struct hlist_node *node_tmp; |
16b1aba8 | 643 | struct hlist_head *head; |
16b1aba8 | 644 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 645 | struct batadv_orig_node *orig_node; |
6b5e971a | 646 | u32 i; |
16b1aba8 ML |
647 | |
648 | if (!hash) | |
c6c8fea2 SE |
649 | return; |
650 | ||
651 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
652 | ||
c6c8fea2 | 653 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
654 | |
655 | for (i = 0; i < hash->size; i++) { | |
656 | head = &hash->table[i]; | |
657 | list_lock = &hash->list_locks[i]; | |
658 | ||
659 | spin_lock_bh(list_lock); | |
b67bfe0d | 660 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 661 | head, hash_entry) { |
b67bfe0d | 662 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 663 | batadv_orig_node_free_ref(orig_node); |
16b1aba8 ML |
664 | } |
665 | spin_unlock_bh(list_lock); | |
666 | } | |
667 | ||
1a8eaf07 | 668 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
669 | } |
670 | ||
bbad0a5e AQ |
671 | /** |
672 | * batadv_orig_node_new - creates a new orig_node | |
673 | * @bat_priv: the bat priv with all the soft interface information | |
674 | * @addr: the mac address of the originator | |
675 | * | |
676 | * Creates a new originator object and initialise all the generic fields. | |
677 | * The new object is not added to the originator list. | |
678 | * Returns the newly created object or NULL on failure. | |
9cfc7bd6 | 679 | */ |
bbad0a5e | 680 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
6b5e971a | 681 | const u8 *addr) |
c6c8fea2 | 682 | { |
56303d34 | 683 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 684 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 685 | unsigned long reset_time; |
bbad0a5e | 686 | int i; |
c6c8fea2 | 687 | |
39c75a51 SE |
688 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
689 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 690 | |
704509b8 | 691 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
692 | if (!orig_node) |
693 | return NULL; | |
694 | ||
9591a79f | 695 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
d0fa4f3f | 696 | INIT_HLIST_HEAD(&orig_node->vlan_list); |
7351a482 | 697 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 698 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 699 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 700 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 701 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 702 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 703 | |
d56b1705 MH |
704 | batadv_nc_init_orig(orig_node); |
705 | ||
7b36e8ee ML |
706 | /* extra reference for return */ |
707 | atomic_set(&orig_node->refcount, 2); | |
c6c8fea2 | 708 | |
16b1aba8 | 709 | orig_node->bat_priv = bat_priv; |
8fdd0153 | 710 | ether_addr_copy(orig_node->orig, addr); |
785ea114 | 711 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 712 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 713 | orig_node->tt_buff = NULL; |
a73105b8 | 714 | orig_node->tt_buff_len = 0; |
2c667a33 | 715 | orig_node->last_seen = jiffies; |
42d0b044 SE |
716 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
717 | orig_node->bcast_seqno_reset = reset_time; | |
8a4023c5 | 718 | |
60432d75 LL |
719 | #ifdef CONFIG_BATMAN_ADV_MCAST |
720 | orig_node->mcast_flags = BATADV_NO_FLAGS; | |
8a4023c5 LL |
721 | INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node); |
722 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node); | |
723 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node); | |
724 | spin_lock_init(&orig_node->mcast_handler_lock); | |
60432d75 | 725 | #endif |
c6c8fea2 | 726 | |
7ea7b4a1 AQ |
727 | /* create a vlan object for the "untagged" LAN */ |
728 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
729 | if (!vlan) | |
730 | goto free_orig_node; | |
731 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
732 | * Immediately release vlan since it is not needed anymore in this | |
733 | * context | |
734 | */ | |
735 | batadv_orig_node_vlan_free_ref(vlan); | |
736 | ||
610bfc6b MH |
737 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
738 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
739 | spin_lock_init(&orig_node->fragments[i].lock); | |
740 | orig_node->fragments[i].size = 0; | |
741 | } | |
742 | ||
c6c8fea2 | 743 | return orig_node; |
c6c8fea2 SE |
744 | free_orig_node: |
745 | kfree(orig_node); | |
746 | return NULL; | |
747 | } | |
748 | ||
709de13f SW |
749 | /** |
750 | * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor | |
751 | * @bat_priv: the bat priv with all the soft interface information | |
752 | * @neigh: orig node which is to be checked | |
753 | */ | |
754 | static void | |
755 | batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, | |
756 | struct batadv_neigh_node *neigh) | |
757 | { | |
758 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
759 | struct batadv_hard_iface *if_outgoing; | |
760 | struct hlist_node *node_tmp; | |
761 | ||
762 | spin_lock_bh(&neigh->ifinfo_lock); | |
763 | ||
764 | /* for all ifinfo objects for this neighinator */ | |
765 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
766 | &neigh->ifinfo_list, list) { | |
767 | if_outgoing = neigh_ifinfo->if_outgoing; | |
768 | ||
769 | /* always keep the default interface */ | |
770 | if (if_outgoing == BATADV_IF_DEFAULT) | |
771 | continue; | |
772 | ||
773 | /* don't purge if the interface is not (going) down */ | |
774 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
775 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
776 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
777 | continue; | |
778 | ||
779 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
780 | "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", | |
781 | neigh->addr, if_outgoing->net_dev->name); | |
782 | ||
783 | hlist_del_rcu(&neigh_ifinfo->list); | |
784 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
785 | } | |
786 | ||
787 | spin_unlock_bh(&neigh->ifinfo_lock); | |
788 | } | |
789 | ||
7351a482 SW |
790 | /** |
791 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
792 | * @bat_priv: the bat priv with all the soft interface information | |
793 | * @orig_node: orig node which is to be checked | |
794 | * | |
795 | * Returns true if any ifinfo entry was purged, false otherwise. | |
796 | */ | |
797 | static bool | |
798 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
799 | struct batadv_orig_node *orig_node) | |
800 | { | |
801 | struct batadv_orig_ifinfo *orig_ifinfo; | |
802 | struct batadv_hard_iface *if_outgoing; | |
803 | struct hlist_node *node_tmp; | |
804 | bool ifinfo_purged = false; | |
805 | ||
806 | spin_lock_bh(&orig_node->neigh_list_lock); | |
807 | ||
808 | /* for all ifinfo objects for this originator */ | |
809 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
810 | &orig_node->ifinfo_list, list) { | |
811 | if_outgoing = orig_ifinfo->if_outgoing; | |
812 | ||
813 | /* always keep the default interface */ | |
814 | if (if_outgoing == BATADV_IF_DEFAULT) | |
815 | continue; | |
816 | ||
817 | /* don't purge if the interface is not (going) down */ | |
818 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
819 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
820 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
821 | continue; | |
822 | ||
823 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
824 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
825 | orig_node->orig, if_outgoing->net_dev->name); | |
826 | ||
827 | ifinfo_purged = true; | |
828 | ||
829 | hlist_del_rcu(&orig_ifinfo->list); | |
830 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
f3b3d901 SW |
831 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
832 | orig_node->last_bonding_candidate = NULL; | |
833 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
834 | } | |
7351a482 SW |
835 | } |
836 | ||
837 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
838 | ||
839 | return ifinfo_purged; | |
840 | } | |
841 | ||
89652331 SW |
842 | /** |
843 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
844 | * @bat_priv: the bat priv with all the soft interface information | |
845 | * @orig_node: orig node which is to be checked | |
846 | * | |
847 | * Returns true if any neighbor was purged, false otherwise | |
848 | */ | |
56303d34 SE |
849 | static bool |
850 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 851 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 852 | { |
b67bfe0d | 853 | struct hlist_node *node_tmp; |
56303d34 | 854 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 855 | bool neigh_purged = false; |
0b0094e0 | 856 | unsigned long last_seen; |
56303d34 | 857 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 858 | |
f987ed6e ML |
859 | spin_lock_bh(&orig_node->neigh_list_lock); |
860 | ||
c6c8fea2 | 861 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 862 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 863 | &orig_node->neigh_list, list) { |
1eda58bf SE |
864 | last_seen = neigh_node->last_seen; |
865 | if_incoming = neigh_node->if_incoming; | |
866 | ||
42d0b044 | 867 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
868 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
869 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
870 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
871 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
872 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
873 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 874 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
875 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
876 | orig_node->orig, neigh_node->addr, | |
877 | if_incoming->net_dev->name); | |
c6c8fea2 | 878 | else |
39c75a51 | 879 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
880 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
881 | orig_node->orig, neigh_node->addr, | |
882 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
883 | |
884 | neigh_purged = true; | |
9591a79f | 885 | |
f987ed6e | 886 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 887 | batadv_neigh_node_free_ref(neigh_node); |
709de13f SW |
888 | } else { |
889 | /* only necessary if not the whole neighbor is to be | |
890 | * deleted, but some interface has been removed. | |
891 | */ | |
892 | batadv_purge_neigh_ifinfo(bat_priv, neigh_node); | |
c6c8fea2 SE |
893 | } |
894 | } | |
f987ed6e ML |
895 | |
896 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
897 | return neigh_purged; |
898 | } | |
899 | ||
89652331 SW |
900 | /** |
901 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
902 | * @bat_priv: the bat priv with all the soft interface information | |
903 | * @orig_node: orig node which is to be checked | |
904 | * @if_outgoing: the interface for which the metric should be compared | |
905 | * | |
906 | * Returns the current best neighbor, with refcount increased. | |
907 | */ | |
908 | static struct batadv_neigh_node * | |
909 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
910 | struct batadv_orig_node *orig_node, | |
911 | struct batadv_hard_iface *if_outgoing) | |
912 | { | |
913 | struct batadv_neigh_node *best = NULL, *neigh; | |
914 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
915 | ||
916 | rcu_read_lock(); | |
917 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
918 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
919 | best, if_outgoing) <= 0)) | |
920 | continue; | |
921 | ||
922 | if (!atomic_inc_not_zero(&neigh->refcount)) | |
923 | continue; | |
924 | ||
925 | if (best) | |
926 | batadv_neigh_node_free_ref(best); | |
927 | ||
928 | best = neigh; | |
929 | } | |
930 | rcu_read_unlock(); | |
931 | ||
932 | return best; | |
933 | } | |
934 | ||
7351a482 SW |
935 | /** |
936 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
937 | * @bat_priv: the bat priv with all the soft interface information | |
938 | * @orig_node: orig node which is to be checked | |
939 | * | |
940 | * This function checks if the orig_node or substructures of it have become | |
941 | * obsolete, and purges this information if that's the case. | |
942 | * | |
943 | * Returns true if the orig_node is to be removed, false otherwise. | |
944 | */ | |
56303d34 SE |
945 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
946 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 947 | { |
56303d34 | 948 | struct batadv_neigh_node *best_neigh_node; |
7351a482 | 949 | struct batadv_hard_iface *hard_iface; |
7b955a9f | 950 | bool changed_ifinfo, changed_neigh; |
c6c8fea2 | 951 | |
42d0b044 SE |
952 | if (batadv_has_timed_out(orig_node->last_seen, |
953 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 954 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
955 | "Originator timeout: originator %pM, last_seen %u\n", |
956 | orig_node->orig, | |
957 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 958 | return true; |
c6c8fea2 | 959 | } |
7b955a9f SW |
960 | changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
961 | changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); | |
7351a482 | 962 | |
7b955a9f | 963 | if (!changed_ifinfo && !changed_neigh) |
89652331 SW |
964 | return false; |
965 | ||
7351a482 | 966 | /* first for NULL ... */ |
89652331 SW |
967 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
968 | BATADV_IF_DEFAULT); | |
7351a482 SW |
969 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
970 | best_neigh_node); | |
89652331 SW |
971 | if (best_neigh_node) |
972 | batadv_neigh_node_free_ref(best_neigh_node); | |
c6c8fea2 | 973 | |
7351a482 SW |
974 | /* ... then for all other interfaces. */ |
975 | rcu_read_lock(); | |
976 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
977 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
978 | continue; | |
979 | ||
980 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
981 | continue; | |
982 | ||
983 | best_neigh_node = batadv_find_best_neighbor(bat_priv, | |
984 | orig_node, | |
985 | hard_iface); | |
986 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
987 | best_neigh_node); | |
988 | if (best_neigh_node) | |
989 | batadv_neigh_node_free_ref(best_neigh_node); | |
990 | } | |
991 | rcu_read_unlock(); | |
992 | ||
c6c8fea2 SE |
993 | return false; |
994 | } | |
995 | ||
56303d34 | 996 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 997 | { |
5bf74e9c | 998 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 999 | struct hlist_node *node_tmp; |
c6c8fea2 | 1000 | struct hlist_head *head; |
fb778ea1 | 1001 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 1002 | struct batadv_orig_node *orig_node; |
6b5e971a | 1003 | u32 i; |
c6c8fea2 SE |
1004 | |
1005 | if (!hash) | |
1006 | return; | |
1007 | ||
c6c8fea2 SE |
1008 | /* for all origins... */ |
1009 | for (i = 0; i < hash->size; i++) { | |
1010 | head = &hash->table[i]; | |
fb778ea1 | 1011 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1012 | |
fb778ea1 | 1013 | spin_lock_bh(list_lock); |
b67bfe0d | 1014 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 1015 | head, hash_entry) { |
03fc7f86 | 1016 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 1017 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 1018 | hlist_del_rcu(&orig_node->hash_entry); |
9d31b3ce LL |
1019 | batadv_tt_global_del_orig(orig_node->bat_priv, |
1020 | orig_node, -1, | |
1021 | "originator timed out"); | |
7d211efc | 1022 | batadv_orig_node_free_ref(orig_node); |
fb778ea1 | 1023 | continue; |
c6c8fea2 | 1024 | } |
610bfc6b MH |
1025 | |
1026 | batadv_frag_purge_orig(orig_node, | |
1027 | batadv_frag_check_entry); | |
c6c8fea2 | 1028 | } |
fb778ea1 | 1029 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
1030 | } |
1031 | ||
7cf06bc6 | 1032 | batadv_gw_election(bat_priv); |
c6c8fea2 SE |
1033 | } |
1034 | ||
03fc7f86 | 1035 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 1036 | { |
56303d34 SE |
1037 | struct delayed_work *delayed_work; |
1038 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1039 | |
56303d34 SE |
1040 | delayed_work = container_of(work, struct delayed_work, work); |
1041 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 1042 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
1043 | queue_delayed_work(batadv_event_workqueue, |
1044 | &bat_priv->orig_work, | |
1045 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
1046 | } |
1047 | ||
56303d34 | 1048 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 1049 | { |
03fc7f86 | 1050 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
1051 | } |
1052 | ||
7d211efc | 1053 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1054 | { |
1055 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1056 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 1057 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 1058 | |
30da63a6 ML |
1059 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1060 | if (!primary_if) | |
737a2a22 | 1061 | return 0; |
c6c8fea2 | 1062 | |
737a2a22 | 1063 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 1064 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
1065 | primary_if->net_dev->dev_addr, net_dev->name, |
1066 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 1067 | |
737a2a22 | 1068 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 1069 | |
737a2a22 AQ |
1070 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
1071 | seq_puts(seq, | |
1072 | "No printing function for this routing protocol\n"); | |
1073 | return 0; | |
c6c8fea2 SE |
1074 | } |
1075 | ||
cb1c92ec SW |
1076 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, |
1077 | BATADV_IF_DEFAULT); | |
c6c8fea2 | 1078 | |
30da63a6 | 1079 | return 0; |
c6c8fea2 SE |
1080 | } |
1081 | ||
cb1c92ec SW |
1082 | /** |
1083 | * batadv_orig_hardif_seq_print_text - writes originator infos for a specific | |
1084 | * outgoing interface | |
1085 | * @seq: debugfs table seq_file struct | |
1086 | * @offset: not used | |
1087 | * | |
1088 | * Returns 0 | |
1089 | */ | |
1090 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) | |
1091 | { | |
1092 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1093 | struct batadv_hard_iface *hard_iface; | |
1094 | struct batadv_priv *bat_priv; | |
1095 | ||
1096 | hard_iface = batadv_hardif_get_by_netdev(net_dev); | |
1097 | ||
1098 | if (!hard_iface || !hard_iface->soft_iface) { | |
1099 | seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); | |
1100 | goto out; | |
1101 | } | |
1102 | ||
1103 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
1104 | if (!bat_priv->bat_algo_ops->bat_orig_print) { | |
1105 | seq_puts(seq, | |
1106 | "No printing function for this routing protocol\n"); | |
1107 | goto out; | |
1108 | } | |
1109 | ||
1110 | if (hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1111 | seq_puts(seq, "Interface not active\n"); | |
1112 | goto out; | |
1113 | } | |
1114 | ||
1115 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", | |
1116 | BATADV_SOURCE_VERSION, hard_iface->net_dev->name, | |
1117 | hard_iface->net_dev->dev_addr, | |
1118 | hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); | |
1119 | ||
1120 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); | |
1121 | ||
1122 | out: | |
16a41423 ML |
1123 | if (hard_iface) |
1124 | batadv_hardif_free_ref(hard_iface); | |
cb1c92ec SW |
1125 | return 0; |
1126 | } | |
1127 | ||
56303d34 SE |
1128 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
1129 | int max_if_num) | |
c6c8fea2 | 1130 | { |
56303d34 | 1131 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 1132 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 1133 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1134 | struct hlist_head *head; |
56303d34 | 1135 | struct batadv_orig_node *orig_node; |
6b5e971a | 1136 | u32 i; |
c90681b8 | 1137 | int ret; |
c6c8fea2 SE |
1138 | |
1139 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1140 | * if_num |
1141 | */ | |
c6c8fea2 SE |
1142 | for (i = 0; i < hash->size; i++) { |
1143 | head = &hash->table[i]; | |
1144 | ||
fb778ea1 | 1145 | rcu_read_lock(); |
b67bfe0d | 1146 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1147 | ret = 0; |
1148 | if (bao->bat_orig_add_if) | |
1149 | ret = bao->bat_orig_add_if(orig_node, | |
1150 | max_if_num); | |
5346c35e | 1151 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1152 | goto err; |
1153 | } | |
fb778ea1 | 1154 | rcu_read_unlock(); |
c6c8fea2 SE |
1155 | } |
1156 | ||
c6c8fea2 SE |
1157 | return 0; |
1158 | ||
1159 | err: | |
fb778ea1 | 1160 | rcu_read_unlock(); |
c6c8fea2 SE |
1161 | return -ENOMEM; |
1162 | } | |
1163 | ||
56303d34 SE |
1164 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
1165 | int max_if_num) | |
c6c8fea2 | 1166 | { |
56303d34 | 1167 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 1168 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1169 | struct hlist_head *head; |
56303d34 SE |
1170 | struct batadv_hard_iface *hard_iface_tmp; |
1171 | struct batadv_orig_node *orig_node; | |
d0015fdd | 1172 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
6b5e971a | 1173 | u32 i; |
c90681b8 | 1174 | int ret; |
c6c8fea2 SE |
1175 | |
1176 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1177 | * if_num |
1178 | */ | |
c6c8fea2 SE |
1179 | for (i = 0; i < hash->size; i++) { |
1180 | head = &hash->table[i]; | |
1181 | ||
fb778ea1 | 1182 | rcu_read_lock(); |
b67bfe0d | 1183 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1184 | ret = 0; |
1185 | if (bao->bat_orig_del_if) | |
1186 | ret = bao->bat_orig_del_if(orig_node, | |
1187 | max_if_num, | |
1188 | hard_iface->if_num); | |
5346c35e | 1189 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1190 | goto err; |
1191 | } | |
fb778ea1 | 1192 | rcu_read_unlock(); |
c6c8fea2 SE |
1193 | } |
1194 | ||
1195 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1196 | rcu_read_lock(); | |
3193e8fd | 1197 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1198 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1199 | continue; |
1200 | ||
e6c10f43 | 1201 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1202 | continue; |
1203 | ||
e6c10f43 | 1204 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1205 | continue; |
1206 | ||
e6c10f43 ML |
1207 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1208 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1209 | } |
1210 | rcu_read_unlock(); | |
1211 | ||
e6c10f43 | 1212 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1213 | return 0; |
1214 | ||
1215 | err: | |
fb778ea1 | 1216 | rcu_read_unlock(); |
c6c8fea2 SE |
1217 | return -ENOMEM; |
1218 | } |