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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 | ||
0538f759 AQ |
445 | /** |
446 | * batadv_neigh_node_new - create and init a new neigh_node object | |
447 | * @hard_iface: the interface where the neighbour is connected to | |
448 | * @neigh_addr: the mac address of the neighbour interface | |
449 | * @orig_node: originator object representing the neighbour | |
450 | * | |
451 | * Allocates a new neigh_node object and initialises all the generic fields. | |
452 | * Returns the new object or NULL on failure. | |
453 | */ | |
56303d34 SE |
454 | struct batadv_neigh_node * |
455 | batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, | |
6b5e971a | 456 | const u8 *neigh_addr, 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 | |
f729dc70 ML |
464 | if (!atomic_inc_not_zero(&hard_iface->refcount)) { |
465 | kfree(neigh_node); | |
466 | neigh_node = NULL; | |
467 | goto out; | |
468 | } | |
469 | ||
9591a79f | 470 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
471 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
472 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 473 | |
8fdd0153 | 474 | ether_addr_copy(neigh_node->addr, neigh_addr); |
0538f759 AQ |
475 | neigh_node->if_incoming = hard_iface; |
476 | neigh_node->orig_node = orig_node; | |
477 | ||
1605d0d6 ML |
478 | /* extra reference for return */ |
479 | atomic_set(&neigh_node->refcount, 2); | |
c6c8fea2 | 480 | |
7ae8b285 | 481 | out: |
c6c8fea2 SE |
482 | return neigh_node; |
483 | } | |
484 | ||
08bf0ed2 AQ |
485 | /** |
486 | * batadv_neigh_node_get - retrieve a neighbour from the list | |
487 | * @orig_node: originator which the neighbour belongs to | |
488 | * @hard_iface: the interface where this neighbour is connected to | |
489 | * @addr: the address of the neighbour | |
490 | * | |
491 | * Looks for and possibly returns a neighbour belonging to this originator list | |
492 | * which is connected through the provided hard interface. | |
493 | * Returns NULL if the neighbour is not found. | |
494 | */ | |
495 | struct batadv_neigh_node * | |
496 | batadv_neigh_node_get(const struct batadv_orig_node *orig_node, | |
497 | const struct batadv_hard_iface *hard_iface, | |
6b5e971a | 498 | const u8 *addr) |
08bf0ed2 AQ |
499 | { |
500 | struct batadv_neigh_node *tmp_neigh_node, *res = NULL; | |
501 | ||
502 | rcu_read_lock(); | |
503 | hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { | |
504 | if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) | |
505 | continue; | |
506 | ||
507 | if (tmp_neigh_node->if_incoming != hard_iface) | |
508 | continue; | |
509 | ||
510 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) | |
511 | continue; | |
512 | ||
513 | res = tmp_neigh_node; | |
514 | break; | |
515 | } | |
516 | rcu_read_unlock(); | |
517 | ||
518 | return res; | |
519 | } | |
520 | ||
7351a482 SW |
521 | /** |
522 | * batadv_orig_ifinfo_free_rcu - free the orig_ifinfo object | |
523 | * @rcu: rcu pointer of the orig_ifinfo object | |
524 | */ | |
525 | static void batadv_orig_ifinfo_free_rcu(struct rcu_head *rcu) | |
526 | { | |
527 | struct batadv_orig_ifinfo *orig_ifinfo; | |
000c8dff | 528 | struct batadv_neigh_node *router; |
7351a482 SW |
529 | |
530 | orig_ifinfo = container_of(rcu, struct batadv_orig_ifinfo, rcu); | |
531 | ||
532 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) | |
533 | batadv_hardif_free_ref_now(orig_ifinfo->if_outgoing); | |
534 | ||
000c8dff SW |
535 | /* this is the last reference to this object */ |
536 | router = rcu_dereference_protected(orig_ifinfo->router, true); | |
537 | if (router) | |
538 | batadv_neigh_node_free_ref_now(router); | |
7351a482 SW |
539 | kfree(orig_ifinfo); |
540 | } | |
541 | ||
542 | /** | |
543 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free | |
544 | * the orig_ifinfo (without rcu callback) | |
545 | * @orig_ifinfo: the orig_ifinfo object to release | |
546 | */ | |
547 | static void | |
548 | batadv_orig_ifinfo_free_ref_now(struct batadv_orig_ifinfo *orig_ifinfo) | |
549 | { | |
550 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
551 | batadv_orig_ifinfo_free_rcu(&orig_ifinfo->rcu); | |
552 | } | |
553 | ||
554 | /** | |
555 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free | |
556 | * the orig_ifinfo | |
557 | * @orig_ifinfo: the orig_ifinfo object to release | |
558 | */ | |
559 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) | |
560 | { | |
561 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
562 | call_rcu(&orig_ifinfo->rcu, batadv_orig_ifinfo_free_rcu); | |
563 | } | |
564 | ||
03fc7f86 | 565 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 566 | { |
b67bfe0d | 567 | struct hlist_node *node_tmp; |
f6c8b711 | 568 | struct batadv_neigh_node *neigh_node; |
56303d34 | 569 | struct batadv_orig_node *orig_node; |
7351a482 | 570 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 571 | |
56303d34 | 572 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); |
c6c8fea2 | 573 | |
f987ed6e ML |
574 | spin_lock_bh(&orig_node->neigh_list_lock); |
575 | ||
c6c8fea2 | 576 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 577 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 578 | &orig_node->neigh_list, list) { |
f987ed6e | 579 | hlist_del_rcu(&neigh_node->list); |
89652331 | 580 | batadv_neigh_node_free_ref_now(neigh_node); |
c6c8fea2 SE |
581 | } |
582 | ||
7351a482 SW |
583 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
584 | &orig_node->ifinfo_list, list) { | |
585 | hlist_del_rcu(&orig_ifinfo->list); | |
586 | batadv_orig_ifinfo_free_ref_now(orig_ifinfo); | |
587 | } | |
f987ed6e ML |
588 | spin_unlock_bh(&orig_node->neigh_list_lock); |
589 | ||
60432d75 LL |
590 | batadv_mcast_purge_orig(orig_node); |
591 | ||
d56b1705 MH |
592 | /* Free nc_nodes */ |
593 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
594 | ||
610bfc6b MH |
595 | batadv_frag_purge_orig(orig_node, NULL); |
596 | ||
d0015fdd AQ |
597 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) |
598 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
599 | ||
a73105b8 | 600 | kfree(orig_node->tt_buff); |
c6c8fea2 SE |
601 | kfree(orig_node); |
602 | } | |
603 | ||
72822225 LL |
604 | /** |
605 | * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly | |
606 | * schedule an rcu callback for freeing it | |
607 | * @orig_node: the orig node to free | |
608 | */ | |
56303d34 | 609 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) |
7b36e8ee ML |
610 | { |
611 | if (atomic_dec_and_test(&orig_node->refcount)) | |
03fc7f86 | 612 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
7b36e8ee ML |
613 | } |
614 | ||
72822225 LL |
615 | /** |
616 | * batadv_orig_node_free_ref_now - decrement the orig node refcounter and | |
617 | * possibly free it (without rcu callback) | |
618 | * @orig_node: the orig node to free | |
619 | */ | |
620 | void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node) | |
621 | { | |
622 | if (atomic_dec_and_test(&orig_node->refcount)) | |
623 | batadv_orig_node_free_rcu(&orig_node->rcu); | |
624 | } | |
625 | ||
56303d34 | 626 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 627 | { |
5bf74e9c | 628 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 629 | struct hlist_node *node_tmp; |
16b1aba8 | 630 | struct hlist_head *head; |
16b1aba8 | 631 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 632 | struct batadv_orig_node *orig_node; |
6b5e971a | 633 | u32 i; |
16b1aba8 ML |
634 | |
635 | if (!hash) | |
c6c8fea2 SE |
636 | return; |
637 | ||
638 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
639 | ||
c6c8fea2 | 640 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
641 | |
642 | for (i = 0; i < hash->size; i++) { | |
643 | head = &hash->table[i]; | |
644 | list_lock = &hash->list_locks[i]; | |
645 | ||
646 | spin_lock_bh(list_lock); | |
b67bfe0d | 647 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 648 | head, hash_entry) { |
b67bfe0d | 649 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 650 | batadv_orig_node_free_ref(orig_node); |
16b1aba8 ML |
651 | } |
652 | spin_unlock_bh(list_lock); | |
653 | } | |
654 | ||
1a8eaf07 | 655 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
656 | } |
657 | ||
bbad0a5e AQ |
658 | /** |
659 | * batadv_orig_node_new - creates a new orig_node | |
660 | * @bat_priv: the bat priv with all the soft interface information | |
661 | * @addr: the mac address of the originator | |
662 | * | |
663 | * Creates a new originator object and initialise all the generic fields. | |
664 | * The new object is not added to the originator list. | |
665 | * Returns the newly created object or NULL on failure. | |
9cfc7bd6 | 666 | */ |
bbad0a5e | 667 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
6b5e971a | 668 | const u8 *addr) |
c6c8fea2 | 669 | { |
56303d34 | 670 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 671 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 672 | unsigned long reset_time; |
bbad0a5e | 673 | int i; |
c6c8fea2 | 674 | |
39c75a51 SE |
675 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
676 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 677 | |
704509b8 | 678 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
679 | if (!orig_node) |
680 | return NULL; | |
681 | ||
9591a79f | 682 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
d0fa4f3f | 683 | INIT_HLIST_HEAD(&orig_node->vlan_list); |
7351a482 | 684 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 685 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 686 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 687 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 688 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 689 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 690 | |
d56b1705 MH |
691 | batadv_nc_init_orig(orig_node); |
692 | ||
7b36e8ee ML |
693 | /* extra reference for return */ |
694 | atomic_set(&orig_node->refcount, 2); | |
c6c8fea2 | 695 | |
16b1aba8 | 696 | orig_node->bat_priv = bat_priv; |
8fdd0153 | 697 | ether_addr_copy(orig_node->orig, addr); |
785ea114 | 698 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 699 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 700 | orig_node->tt_buff = NULL; |
a73105b8 | 701 | orig_node->tt_buff_len = 0; |
2c667a33 | 702 | orig_node->last_seen = jiffies; |
42d0b044 SE |
703 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
704 | orig_node->bcast_seqno_reset = reset_time; | |
8a4023c5 | 705 | |
60432d75 LL |
706 | #ifdef CONFIG_BATMAN_ADV_MCAST |
707 | orig_node->mcast_flags = BATADV_NO_FLAGS; | |
8a4023c5 LL |
708 | INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node); |
709 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node); | |
710 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node); | |
711 | spin_lock_init(&orig_node->mcast_handler_lock); | |
60432d75 | 712 | #endif |
c6c8fea2 | 713 | |
7ea7b4a1 AQ |
714 | /* create a vlan object for the "untagged" LAN */ |
715 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
716 | if (!vlan) | |
717 | goto free_orig_node; | |
718 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
719 | * Immediately release vlan since it is not needed anymore in this | |
720 | * context | |
721 | */ | |
722 | batadv_orig_node_vlan_free_ref(vlan); | |
723 | ||
610bfc6b MH |
724 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
725 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
726 | spin_lock_init(&orig_node->fragments[i].lock); | |
727 | orig_node->fragments[i].size = 0; | |
728 | } | |
729 | ||
c6c8fea2 | 730 | return orig_node; |
c6c8fea2 SE |
731 | free_orig_node: |
732 | kfree(orig_node); | |
733 | return NULL; | |
734 | } | |
735 | ||
709de13f SW |
736 | /** |
737 | * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor | |
738 | * @bat_priv: the bat priv with all the soft interface information | |
739 | * @neigh: orig node which is to be checked | |
740 | */ | |
741 | static void | |
742 | batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, | |
743 | struct batadv_neigh_node *neigh) | |
744 | { | |
745 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
746 | struct batadv_hard_iface *if_outgoing; | |
747 | struct hlist_node *node_tmp; | |
748 | ||
749 | spin_lock_bh(&neigh->ifinfo_lock); | |
750 | ||
751 | /* for all ifinfo objects for this neighinator */ | |
752 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
753 | &neigh->ifinfo_list, list) { | |
754 | if_outgoing = neigh_ifinfo->if_outgoing; | |
755 | ||
756 | /* always keep the default interface */ | |
757 | if (if_outgoing == BATADV_IF_DEFAULT) | |
758 | continue; | |
759 | ||
760 | /* don't purge if the interface is not (going) down */ | |
761 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
762 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
763 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
764 | continue; | |
765 | ||
766 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
767 | "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", | |
768 | neigh->addr, if_outgoing->net_dev->name); | |
769 | ||
770 | hlist_del_rcu(&neigh_ifinfo->list); | |
771 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
772 | } | |
773 | ||
774 | spin_unlock_bh(&neigh->ifinfo_lock); | |
775 | } | |
776 | ||
7351a482 SW |
777 | /** |
778 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
779 | * @bat_priv: the bat priv with all the soft interface information | |
780 | * @orig_node: orig node which is to be checked | |
781 | * | |
782 | * Returns true if any ifinfo entry was purged, false otherwise. | |
783 | */ | |
784 | static bool | |
785 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
786 | struct batadv_orig_node *orig_node) | |
787 | { | |
788 | struct batadv_orig_ifinfo *orig_ifinfo; | |
789 | struct batadv_hard_iface *if_outgoing; | |
790 | struct hlist_node *node_tmp; | |
791 | bool ifinfo_purged = false; | |
792 | ||
793 | spin_lock_bh(&orig_node->neigh_list_lock); | |
794 | ||
795 | /* for all ifinfo objects for this originator */ | |
796 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
797 | &orig_node->ifinfo_list, list) { | |
798 | if_outgoing = orig_ifinfo->if_outgoing; | |
799 | ||
800 | /* always keep the default interface */ | |
801 | if (if_outgoing == BATADV_IF_DEFAULT) | |
802 | continue; | |
803 | ||
804 | /* don't purge if the interface is not (going) down */ | |
805 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
806 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
807 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
808 | continue; | |
809 | ||
810 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
811 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
812 | orig_node->orig, if_outgoing->net_dev->name); | |
813 | ||
814 | ifinfo_purged = true; | |
815 | ||
816 | hlist_del_rcu(&orig_ifinfo->list); | |
817 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
f3b3d901 SW |
818 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
819 | orig_node->last_bonding_candidate = NULL; | |
820 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
821 | } | |
7351a482 SW |
822 | } |
823 | ||
824 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
825 | ||
826 | return ifinfo_purged; | |
827 | } | |
828 | ||
89652331 SW |
829 | /** |
830 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
831 | * @bat_priv: the bat priv with all the soft interface information | |
832 | * @orig_node: orig node which is to be checked | |
833 | * | |
834 | * Returns true if any neighbor was purged, false otherwise | |
835 | */ | |
56303d34 SE |
836 | static bool |
837 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 838 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 839 | { |
b67bfe0d | 840 | struct hlist_node *node_tmp; |
56303d34 | 841 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 842 | bool neigh_purged = false; |
0b0094e0 | 843 | unsigned long last_seen; |
56303d34 | 844 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 845 | |
f987ed6e ML |
846 | spin_lock_bh(&orig_node->neigh_list_lock); |
847 | ||
c6c8fea2 | 848 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 849 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 850 | &orig_node->neigh_list, list) { |
1eda58bf SE |
851 | last_seen = neigh_node->last_seen; |
852 | if_incoming = neigh_node->if_incoming; | |
853 | ||
42d0b044 | 854 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
855 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
856 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
857 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
858 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
859 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
860 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 861 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
862 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
863 | orig_node->orig, neigh_node->addr, | |
864 | if_incoming->net_dev->name); | |
c6c8fea2 | 865 | else |
39c75a51 | 866 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
867 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
868 | orig_node->orig, neigh_node->addr, | |
869 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
870 | |
871 | neigh_purged = true; | |
9591a79f | 872 | |
f987ed6e | 873 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 874 | batadv_neigh_node_free_ref(neigh_node); |
709de13f SW |
875 | } else { |
876 | /* only necessary if not the whole neighbor is to be | |
877 | * deleted, but some interface has been removed. | |
878 | */ | |
879 | batadv_purge_neigh_ifinfo(bat_priv, neigh_node); | |
c6c8fea2 SE |
880 | } |
881 | } | |
f987ed6e ML |
882 | |
883 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
884 | return neigh_purged; |
885 | } | |
886 | ||
89652331 SW |
887 | /** |
888 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
889 | * @bat_priv: the bat priv with all the soft interface information | |
890 | * @orig_node: orig node which is to be checked | |
891 | * @if_outgoing: the interface for which the metric should be compared | |
892 | * | |
893 | * Returns the current best neighbor, with refcount increased. | |
894 | */ | |
895 | static struct batadv_neigh_node * | |
896 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
897 | struct batadv_orig_node *orig_node, | |
898 | struct batadv_hard_iface *if_outgoing) | |
899 | { | |
900 | struct batadv_neigh_node *best = NULL, *neigh; | |
901 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
902 | ||
903 | rcu_read_lock(); | |
904 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
905 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
906 | best, if_outgoing) <= 0)) | |
907 | continue; | |
908 | ||
909 | if (!atomic_inc_not_zero(&neigh->refcount)) | |
910 | continue; | |
911 | ||
912 | if (best) | |
913 | batadv_neigh_node_free_ref(best); | |
914 | ||
915 | best = neigh; | |
916 | } | |
917 | rcu_read_unlock(); | |
918 | ||
919 | return best; | |
920 | } | |
921 | ||
7351a482 SW |
922 | /** |
923 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
924 | * @bat_priv: the bat priv with all the soft interface information | |
925 | * @orig_node: orig node which is to be checked | |
926 | * | |
927 | * This function checks if the orig_node or substructures of it have become | |
928 | * obsolete, and purges this information if that's the case. | |
929 | * | |
930 | * Returns true if the orig_node is to be removed, false otherwise. | |
931 | */ | |
56303d34 SE |
932 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
933 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 934 | { |
56303d34 | 935 | struct batadv_neigh_node *best_neigh_node; |
7351a482 | 936 | struct batadv_hard_iface *hard_iface; |
7b955a9f | 937 | bool changed_ifinfo, changed_neigh; |
c6c8fea2 | 938 | |
42d0b044 SE |
939 | if (batadv_has_timed_out(orig_node->last_seen, |
940 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 941 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
942 | "Originator timeout: originator %pM, last_seen %u\n", |
943 | orig_node->orig, | |
944 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 945 | return true; |
c6c8fea2 | 946 | } |
7b955a9f SW |
947 | changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
948 | changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); | |
7351a482 | 949 | |
7b955a9f | 950 | if (!changed_ifinfo && !changed_neigh) |
89652331 SW |
951 | return false; |
952 | ||
7351a482 | 953 | /* first for NULL ... */ |
89652331 SW |
954 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
955 | BATADV_IF_DEFAULT); | |
7351a482 SW |
956 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
957 | best_neigh_node); | |
89652331 SW |
958 | if (best_neigh_node) |
959 | batadv_neigh_node_free_ref(best_neigh_node); | |
c6c8fea2 | 960 | |
7351a482 SW |
961 | /* ... then for all other interfaces. */ |
962 | rcu_read_lock(); | |
963 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
964 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
965 | continue; | |
966 | ||
967 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
968 | continue; | |
969 | ||
970 | best_neigh_node = batadv_find_best_neighbor(bat_priv, | |
971 | orig_node, | |
972 | hard_iface); | |
973 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
974 | best_neigh_node); | |
975 | if (best_neigh_node) | |
976 | batadv_neigh_node_free_ref(best_neigh_node); | |
977 | } | |
978 | rcu_read_unlock(); | |
979 | ||
c6c8fea2 SE |
980 | return false; |
981 | } | |
982 | ||
56303d34 | 983 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 984 | { |
5bf74e9c | 985 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 986 | struct hlist_node *node_tmp; |
c6c8fea2 | 987 | struct hlist_head *head; |
fb778ea1 | 988 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 989 | struct batadv_orig_node *orig_node; |
6b5e971a | 990 | u32 i; |
c6c8fea2 SE |
991 | |
992 | if (!hash) | |
993 | return; | |
994 | ||
c6c8fea2 SE |
995 | /* for all origins... */ |
996 | for (i = 0; i < hash->size; i++) { | |
997 | head = &hash->table[i]; | |
fb778ea1 | 998 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 999 | |
fb778ea1 | 1000 | spin_lock_bh(list_lock); |
b67bfe0d | 1001 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 1002 | head, hash_entry) { |
03fc7f86 | 1003 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 1004 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 1005 | hlist_del_rcu(&orig_node->hash_entry); |
9d31b3ce LL |
1006 | batadv_tt_global_del_orig(orig_node->bat_priv, |
1007 | orig_node, -1, | |
1008 | "originator timed out"); | |
7d211efc | 1009 | batadv_orig_node_free_ref(orig_node); |
fb778ea1 | 1010 | continue; |
c6c8fea2 | 1011 | } |
610bfc6b MH |
1012 | |
1013 | batadv_frag_purge_orig(orig_node, | |
1014 | batadv_frag_check_entry); | |
c6c8fea2 | 1015 | } |
fb778ea1 | 1016 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
1017 | } |
1018 | ||
7cf06bc6 SE |
1019 | batadv_gw_node_purge(bat_priv); |
1020 | batadv_gw_election(bat_priv); | |
c6c8fea2 SE |
1021 | } |
1022 | ||
03fc7f86 | 1023 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 1024 | { |
56303d34 SE |
1025 | struct delayed_work *delayed_work; |
1026 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1027 | |
56303d34 SE |
1028 | delayed_work = container_of(work, struct delayed_work, work); |
1029 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 1030 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
1031 | queue_delayed_work(batadv_event_workqueue, |
1032 | &bat_priv->orig_work, | |
1033 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
1034 | } |
1035 | ||
56303d34 | 1036 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 1037 | { |
03fc7f86 | 1038 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
1039 | } |
1040 | ||
7d211efc | 1041 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1042 | { |
1043 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1044 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 1045 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 1046 | |
30da63a6 ML |
1047 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1048 | if (!primary_if) | |
737a2a22 | 1049 | return 0; |
c6c8fea2 | 1050 | |
737a2a22 | 1051 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 1052 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
1053 | primary_if->net_dev->dev_addr, net_dev->name, |
1054 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 1055 | |
737a2a22 | 1056 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 1057 | |
737a2a22 AQ |
1058 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
1059 | seq_puts(seq, | |
1060 | "No printing function for this routing protocol\n"); | |
1061 | return 0; | |
c6c8fea2 SE |
1062 | } |
1063 | ||
cb1c92ec SW |
1064 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, |
1065 | BATADV_IF_DEFAULT); | |
c6c8fea2 | 1066 | |
30da63a6 | 1067 | return 0; |
c6c8fea2 SE |
1068 | } |
1069 | ||
cb1c92ec SW |
1070 | /** |
1071 | * batadv_orig_hardif_seq_print_text - writes originator infos for a specific | |
1072 | * outgoing interface | |
1073 | * @seq: debugfs table seq_file struct | |
1074 | * @offset: not used | |
1075 | * | |
1076 | * Returns 0 | |
1077 | */ | |
1078 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) | |
1079 | { | |
1080 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1081 | struct batadv_hard_iface *hard_iface; | |
1082 | struct batadv_priv *bat_priv; | |
1083 | ||
1084 | hard_iface = batadv_hardif_get_by_netdev(net_dev); | |
1085 | ||
1086 | if (!hard_iface || !hard_iface->soft_iface) { | |
1087 | seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); | |
1088 | goto out; | |
1089 | } | |
1090 | ||
1091 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
1092 | if (!bat_priv->bat_algo_ops->bat_orig_print) { | |
1093 | seq_puts(seq, | |
1094 | "No printing function for this routing protocol\n"); | |
1095 | goto out; | |
1096 | } | |
1097 | ||
1098 | if (hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1099 | seq_puts(seq, "Interface not active\n"); | |
1100 | goto out; | |
1101 | } | |
1102 | ||
1103 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", | |
1104 | BATADV_SOURCE_VERSION, hard_iface->net_dev->name, | |
1105 | hard_iface->net_dev->dev_addr, | |
1106 | hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); | |
1107 | ||
1108 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); | |
1109 | ||
1110 | out: | |
16a41423 ML |
1111 | if (hard_iface) |
1112 | batadv_hardif_free_ref(hard_iface); | |
cb1c92ec SW |
1113 | return 0; |
1114 | } | |
1115 | ||
56303d34 SE |
1116 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
1117 | int max_if_num) | |
c6c8fea2 | 1118 | { |
56303d34 | 1119 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 1120 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 1121 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1122 | struct hlist_head *head; |
56303d34 | 1123 | struct batadv_orig_node *orig_node; |
6b5e971a | 1124 | u32 i; |
c90681b8 | 1125 | int ret; |
c6c8fea2 SE |
1126 | |
1127 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1128 | * if_num |
1129 | */ | |
c6c8fea2 SE |
1130 | for (i = 0; i < hash->size; i++) { |
1131 | head = &hash->table[i]; | |
1132 | ||
fb778ea1 | 1133 | rcu_read_lock(); |
b67bfe0d | 1134 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1135 | ret = 0; |
1136 | if (bao->bat_orig_add_if) | |
1137 | ret = bao->bat_orig_add_if(orig_node, | |
1138 | max_if_num); | |
5346c35e | 1139 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1140 | goto err; |
1141 | } | |
fb778ea1 | 1142 | rcu_read_unlock(); |
c6c8fea2 SE |
1143 | } |
1144 | ||
c6c8fea2 SE |
1145 | return 0; |
1146 | ||
1147 | err: | |
fb778ea1 | 1148 | rcu_read_unlock(); |
c6c8fea2 SE |
1149 | return -ENOMEM; |
1150 | } | |
1151 | ||
56303d34 SE |
1152 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
1153 | int max_if_num) | |
c6c8fea2 | 1154 | { |
56303d34 | 1155 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 1156 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1157 | struct hlist_head *head; |
56303d34 SE |
1158 | struct batadv_hard_iface *hard_iface_tmp; |
1159 | struct batadv_orig_node *orig_node; | |
d0015fdd | 1160 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
6b5e971a | 1161 | u32 i; |
c90681b8 | 1162 | int ret; |
c6c8fea2 SE |
1163 | |
1164 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1165 | * if_num |
1166 | */ | |
c6c8fea2 SE |
1167 | for (i = 0; i < hash->size; i++) { |
1168 | head = &hash->table[i]; | |
1169 | ||
fb778ea1 | 1170 | rcu_read_lock(); |
b67bfe0d | 1171 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1172 | ret = 0; |
1173 | if (bao->bat_orig_del_if) | |
1174 | ret = bao->bat_orig_del_if(orig_node, | |
1175 | max_if_num, | |
1176 | hard_iface->if_num); | |
5346c35e | 1177 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1178 | goto err; |
1179 | } | |
fb778ea1 | 1180 | rcu_read_unlock(); |
c6c8fea2 SE |
1181 | } |
1182 | ||
1183 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1184 | rcu_read_lock(); | |
3193e8fd | 1185 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1186 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1187 | continue; |
1188 | ||
e6c10f43 | 1189 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1190 | continue; |
1191 | ||
e6c10f43 | 1192 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1193 | continue; |
1194 | ||
e6c10f43 ML |
1195 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1196 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1197 | } |
1198 | rcu_read_unlock(); | |
1199 | ||
e6c10f43 | 1200 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1201 | return 0; |
1202 | ||
1203 | err: | |
fb778ea1 | 1204 | rcu_read_unlock(); |
c6c8fea2 SE |
1205 | return -ENOMEM; |
1206 | } |