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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 | 165 | /** |
ae3e1e36 SE |
166 | * batadv_neigh_ifinfo_release - release neigh_ifinfo from lists and queue for |
167 | * free after rcu grace period | |
89652331 SW |
168 | * @neigh_ifinfo: the neigh_ifinfo object to release |
169 | */ | |
170 | static void | |
ae3e1e36 | 171 | batadv_neigh_ifinfo_release(struct batadv_neigh_ifinfo *neigh_ifinfo) |
89652331 | 172 | { |
ae3e1e36 SE |
173 | if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
174 | batadv_hardif_free_ref(neigh_ifinfo->if_outgoing); | |
175 | ||
176 | kfree_rcu(neigh_ifinfo, rcu); | |
89652331 SW |
177 | } |
178 | ||
179 | /** | |
ae3e1e36 | 180 | * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly release |
89652331 SW |
181 | * the neigh_ifinfo |
182 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
183 | */ | |
184 | void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo) | |
185 | { | |
186 | if (atomic_dec_and_test(&neigh_ifinfo->refcount)) | |
ae3e1e36 | 187 | batadv_neigh_ifinfo_release(neigh_ifinfo); |
89652331 SW |
188 | } |
189 | ||
cef63419 | 190 | /** |
f6389692 SE |
191 | * batadv_hardif_neigh_release - release hardif neigh node from lists and |
192 | * queue for free after rcu grace period | |
cef63419 ML |
193 | * @hardif_neigh: hardif neigh neighbor to free |
194 | */ | |
195 | static void | |
f6389692 | 196 | batadv_hardif_neigh_release(struct batadv_hardif_neigh_node *hardif_neigh) |
cef63419 | 197 | { |
f6389692 SE |
198 | spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock); |
199 | hlist_del_init_rcu(&hardif_neigh->list); | |
200 | spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock); | |
bab7c6c3 | 201 | |
f6389692 SE |
202 | batadv_hardif_free_ref(hardif_neigh->if_incoming); |
203 | kfree_rcu(hardif_neigh, rcu); | |
cef63419 ML |
204 | } |
205 | ||
206 | /** | |
207 | * batadv_hardif_neigh_free_ref - decrement the hardif neighbors refcounter | |
f6389692 | 208 | * and possibly release it |
cef63419 ML |
209 | * @hardif_neigh: hardif neigh neighbor to free |
210 | */ | |
211 | void batadv_hardif_neigh_free_ref(struct batadv_hardif_neigh_node *hardif_neigh) | |
212 | { | |
f6389692 SE |
213 | if (atomic_dec_and_test(&hardif_neigh->refcount)) |
214 | batadv_hardif_neigh_release(hardif_neigh); | |
cef63419 ML |
215 | } |
216 | ||
89652331 | 217 | /** |
b4d922cf SE |
218 | * batadv_neigh_node_release - release neigh_node from lists and queue for |
219 | * free after rcu grace period | |
220 | * @neigh_node: neigh neighbor to free | |
89652331 | 221 | */ |
b4d922cf | 222 | static void batadv_neigh_node_release(struct batadv_neigh_node *neigh_node) |
89652331 SW |
223 | { |
224 | struct hlist_node *node_tmp; | |
cef63419 | 225 | struct batadv_hardif_neigh_node *hardif_neigh; |
89652331 | 226 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
bcef1f3c | 227 | struct batadv_algo_ops *bao; |
89652331 | 228 | |
bcef1f3c | 229 | bao = neigh_node->orig_node->bat_priv->bat_algo_ops; |
89652331 SW |
230 | |
231 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
232 | &neigh_node->ifinfo_list, list) { | |
ae3e1e36 | 233 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); |
89652331 | 234 | } |
bcef1f3c | 235 | |
cef63419 ML |
236 | hardif_neigh = batadv_hardif_neigh_get(neigh_node->if_incoming, |
237 | neigh_node->addr); | |
238 | if (hardif_neigh) { | |
239 | /* batadv_hardif_neigh_get() increases refcount too */ | |
f6389692 SE |
240 | batadv_hardif_neigh_free_ref(hardif_neigh); |
241 | batadv_hardif_neigh_free_ref(hardif_neigh); | |
cef63419 ML |
242 | } |
243 | ||
bcef1f3c AQ |
244 | if (bao->bat_neigh_free) |
245 | bao->bat_neigh_free(neigh_node); | |
246 | ||
b4d922cf | 247 | batadv_hardif_free_ref(neigh_node->if_incoming); |
89652331 | 248 | |
b4d922cf | 249 | kfree_rcu(neigh_node, rcu); |
89652331 SW |
250 | } |
251 | ||
89652331 SW |
252 | /** |
253 | * batadv_neigh_node_free_ref - decrement the neighbors refcounter | |
2baa753c | 254 | * and possibly release it |
89652331 SW |
255 | * @neigh_node: neigh neighbor to free |
256 | */ | |
56303d34 | 257 | void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) |
a4c135c5 | 258 | { |
44524fcd | 259 | if (atomic_dec_and_test(&neigh_node->refcount)) |
b4d922cf | 260 | batadv_neigh_node_release(neigh_node); |
a4c135c5 SW |
261 | } |
262 | ||
7351a482 SW |
263 | /** |
264 | * batadv_orig_node_get_router - router to the originator depending on iface | |
265 | * @orig_node: the orig node for the router | |
266 | * @if_outgoing: the interface where the payload packet has been received or | |
267 | * the OGM should be sent to | |
268 | * | |
269 | * Returns the neighbor which should be router for this orig_node/iface. | |
270 | * | |
271 | * The object is returned with refcounter increased by 1. | |
272 | */ | |
56303d34 | 273 | struct batadv_neigh_node * |
7351a482 SW |
274 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
275 | const struct batadv_hard_iface *if_outgoing) | |
e1a5382f | 276 | { |
7351a482 SW |
277 | struct batadv_orig_ifinfo *orig_ifinfo; |
278 | struct batadv_neigh_node *router = NULL; | |
e1a5382f LL |
279 | |
280 | rcu_read_lock(); | |
7351a482 SW |
281 | hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { |
282 | if (orig_ifinfo->if_outgoing != if_outgoing) | |
283 | continue; | |
284 | ||
285 | router = rcu_dereference(orig_ifinfo->router); | |
286 | break; | |
287 | } | |
e1a5382f LL |
288 | |
289 | if (router && !atomic_inc_not_zero(&router->refcount)) | |
290 | router = NULL; | |
291 | ||
292 | rcu_read_unlock(); | |
293 | return router; | |
294 | } | |
295 | ||
7351a482 SW |
296 | /** |
297 | * batadv_orig_ifinfo_get - find the ifinfo from an orig_node | |
298 | * @orig_node: the orig node to be queried | |
299 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
300 | * | |
301 | * Returns the requested orig_ifinfo or NULL if not found. | |
302 | * | |
303 | * The object is returned with refcounter increased by 1. | |
304 | */ | |
305 | struct batadv_orig_ifinfo * | |
306 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
307 | struct batadv_hard_iface *if_outgoing) | |
308 | { | |
309 | struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; | |
310 | ||
311 | rcu_read_lock(); | |
312 | hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, | |
313 | list) { | |
314 | if (tmp->if_outgoing != if_outgoing) | |
315 | continue; | |
316 | ||
317 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
318 | continue; | |
319 | ||
320 | orig_ifinfo = tmp; | |
321 | break; | |
322 | } | |
323 | rcu_read_unlock(); | |
324 | ||
325 | return orig_ifinfo; | |
326 | } | |
327 | ||
328 | /** | |
329 | * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object | |
330 | * @orig_node: the orig node to be queried | |
331 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
332 | * | |
333 | * Returns NULL in case of failure or the orig_ifinfo object for the if_outgoing | |
334 | * interface otherwise. The object is created and added to the list | |
335 | * if it does not exist. | |
336 | * | |
337 | * The object is returned with refcounter increased by 1. | |
338 | */ | |
339 | struct batadv_orig_ifinfo * | |
340 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
341 | struct batadv_hard_iface *if_outgoing) | |
342 | { | |
343 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; | |
344 | unsigned long reset_time; | |
345 | ||
346 | spin_lock_bh(&orig_node->neigh_list_lock); | |
347 | ||
348 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
349 | if (orig_ifinfo) | |
350 | goto out; | |
351 | ||
352 | orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); | |
353 | if (!orig_ifinfo) | |
354 | goto out; | |
355 | ||
356 | if (if_outgoing != BATADV_IF_DEFAULT && | |
357 | !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
358 | kfree(orig_ifinfo); | |
359 | orig_ifinfo = NULL; | |
360 | goto out; | |
361 | } | |
362 | ||
363 | reset_time = jiffies - 1; | |
364 | reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); | |
365 | orig_ifinfo->batman_seqno_reset = reset_time; | |
366 | orig_ifinfo->if_outgoing = if_outgoing; | |
367 | INIT_HLIST_NODE(&orig_ifinfo->list); | |
368 | atomic_set(&orig_ifinfo->refcount, 2); | |
369 | hlist_add_head_rcu(&orig_ifinfo->list, | |
370 | &orig_node->ifinfo_list); | |
371 | out: | |
372 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
373 | return orig_ifinfo; | |
374 | } | |
375 | ||
89652331 SW |
376 | /** |
377 | * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node | |
378 | * @neigh_node: the neigh node to be queried | |
379 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
380 | * | |
381 | * The object is returned with refcounter increased by 1. | |
382 | * | |
383 | * Returns the requested neigh_ifinfo or NULL if not found | |
384 | */ | |
385 | struct batadv_neigh_ifinfo * | |
386 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
387 | struct batadv_hard_iface *if_outgoing) | |
388 | { | |
389 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, | |
390 | *tmp_neigh_ifinfo; | |
391 | ||
392 | rcu_read_lock(); | |
393 | hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, | |
394 | list) { | |
395 | if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) | |
396 | continue; | |
397 | ||
398 | if (!atomic_inc_not_zero(&tmp_neigh_ifinfo->refcount)) | |
399 | continue; | |
400 | ||
401 | neigh_ifinfo = tmp_neigh_ifinfo; | |
402 | break; | |
403 | } | |
404 | rcu_read_unlock(); | |
405 | ||
406 | return neigh_ifinfo; | |
407 | } | |
408 | ||
409 | /** | |
410 | * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object | |
411 | * @neigh_node: the neigh node to be queried | |
412 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
413 | * | |
414 | * Returns NULL in case of failure or the neigh_ifinfo object for the | |
415 | * if_outgoing interface otherwise. The object is created and added to the list | |
416 | * if it does not exist. | |
417 | * | |
418 | * The object is returned with refcounter increased by 1. | |
419 | */ | |
420 | struct batadv_neigh_ifinfo * | |
421 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
422 | struct batadv_hard_iface *if_outgoing) | |
423 | { | |
424 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
425 | ||
426 | spin_lock_bh(&neigh->ifinfo_lock); | |
427 | ||
428 | neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); | |
429 | if (neigh_ifinfo) | |
430 | goto out; | |
431 | ||
432 | neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); | |
433 | if (!neigh_ifinfo) | |
434 | goto out; | |
435 | ||
436 | if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
437 | kfree(neigh_ifinfo); | |
438 | neigh_ifinfo = NULL; | |
439 | goto out; | |
440 | } | |
441 | ||
442 | INIT_HLIST_NODE(&neigh_ifinfo->list); | |
443 | atomic_set(&neigh_ifinfo->refcount, 2); | |
444 | neigh_ifinfo->if_outgoing = if_outgoing; | |
445 | ||
446 | hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); | |
447 | ||
448 | out: | |
449 | spin_unlock_bh(&neigh->ifinfo_lock); | |
450 | ||
451 | return neigh_ifinfo; | |
452 | } | |
453 | ||
ed292663 ML |
454 | /** |
455 | * batadv_neigh_node_get - retrieve a neighbour from the list | |
456 | * @orig_node: originator which the neighbour belongs to | |
457 | * @hard_iface: the interface where this neighbour is connected to | |
458 | * @addr: the address of the neighbour | |
459 | * | |
460 | * Looks for and possibly returns a neighbour belonging to this originator list | |
461 | * which is connected through the provided hard interface. | |
462 | * Returns NULL if the neighbour is not found. | |
463 | */ | |
464 | static struct batadv_neigh_node * | |
465 | batadv_neigh_node_get(const struct batadv_orig_node *orig_node, | |
466 | const struct batadv_hard_iface *hard_iface, | |
467 | const u8 *addr) | |
468 | { | |
469 | struct batadv_neigh_node *tmp_neigh_node, *res = NULL; | |
470 | ||
471 | rcu_read_lock(); | |
472 | hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { | |
473 | if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) | |
474 | continue; | |
475 | ||
476 | if (tmp_neigh_node->if_incoming != hard_iface) | |
477 | continue; | |
478 | ||
479 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) | |
480 | continue; | |
481 | ||
482 | res = tmp_neigh_node; | |
483 | break; | |
484 | } | |
485 | rcu_read_unlock(); | |
486 | ||
487 | return res; | |
488 | } | |
489 | ||
cef63419 ML |
490 | /** |
491 | * batadv_hardif_neigh_create - create a hardif neighbour node | |
492 | * @hard_iface: the interface this neighbour is connected to | |
493 | * @neigh_addr: the interface address of the neighbour to retrieve | |
494 | * | |
495 | * Returns the hardif neighbour node if found or created or NULL otherwise. | |
496 | */ | |
497 | static struct batadv_hardif_neigh_node * | |
498 | batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface, | |
499 | const u8 *neigh_addr) | |
500 | { | |
8248a4c7 | 501 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
cef63419 ML |
502 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
503 | ||
504 | spin_lock_bh(&hard_iface->neigh_list_lock); | |
505 | ||
506 | /* check if neighbor hasn't been added in the meantime */ | |
507 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
508 | if (hardif_neigh) | |
509 | goto out; | |
510 | ||
511 | if (!atomic_inc_not_zero(&hard_iface->refcount)) | |
512 | goto out; | |
513 | ||
514 | hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC); | |
515 | if (!hardif_neigh) { | |
516 | batadv_hardif_free_ref(hard_iface); | |
517 | goto out; | |
518 | } | |
519 | ||
520 | INIT_HLIST_NODE(&hardif_neigh->list); | |
521 | ether_addr_copy(hardif_neigh->addr, neigh_addr); | |
522 | hardif_neigh->if_incoming = hard_iface; | |
523 | hardif_neigh->last_seen = jiffies; | |
524 | ||
525 | atomic_set(&hardif_neigh->refcount, 1); | |
526 | ||
8248a4c7 ML |
527 | if (bat_priv->bat_algo_ops->bat_hardif_neigh_init) |
528 | bat_priv->bat_algo_ops->bat_hardif_neigh_init(hardif_neigh); | |
529 | ||
cef63419 ML |
530 | hlist_add_head(&hardif_neigh->list, &hard_iface->neigh_list); |
531 | ||
532 | out: | |
533 | spin_unlock_bh(&hard_iface->neigh_list_lock); | |
534 | return hardif_neigh; | |
535 | } | |
536 | ||
537 | /** | |
538 | * batadv_hardif_neigh_get_or_create - retrieve or create a hardif neighbour | |
539 | * node | |
540 | * @hard_iface: the interface this neighbour is connected to | |
541 | * @neigh_addr: the interface address of the neighbour to retrieve | |
542 | * | |
543 | * Returns the hardif neighbour node if found or created or NULL otherwise. | |
544 | */ | |
545 | static struct batadv_hardif_neigh_node * | |
546 | batadv_hardif_neigh_get_or_create(struct batadv_hard_iface *hard_iface, | |
547 | const u8 *neigh_addr) | |
548 | { | |
549 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; | |
550 | ||
551 | /* first check without locking to avoid the overhead */ | |
552 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
553 | if (hardif_neigh) | |
554 | return hardif_neigh; | |
555 | ||
556 | return batadv_hardif_neigh_create(hard_iface, neigh_addr); | |
557 | } | |
558 | ||
559 | /** | |
560 | * batadv_hardif_neigh_get - retrieve a hardif neighbour from the list | |
561 | * @hard_iface: the interface where this neighbour is connected to | |
562 | * @neigh_addr: the address of the neighbour | |
563 | * | |
564 | * Looks for and possibly returns a neighbour belonging to this hard interface. | |
565 | * Returns NULL if the neighbour is not found. | |
566 | */ | |
567 | struct batadv_hardif_neigh_node * | |
568 | batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface, | |
569 | const u8 *neigh_addr) | |
570 | { | |
571 | struct batadv_hardif_neigh_node *tmp_hardif_neigh, *hardif_neigh = NULL; | |
572 | ||
573 | rcu_read_lock(); | |
574 | hlist_for_each_entry_rcu(tmp_hardif_neigh, | |
575 | &hard_iface->neigh_list, list) { | |
576 | if (!batadv_compare_eth(tmp_hardif_neigh->addr, neigh_addr)) | |
577 | continue; | |
578 | ||
579 | if (!atomic_inc_not_zero(&tmp_hardif_neigh->refcount)) | |
580 | continue; | |
581 | ||
582 | hardif_neigh = tmp_hardif_neigh; | |
583 | break; | |
584 | } | |
585 | rcu_read_unlock(); | |
586 | ||
587 | return hardif_neigh; | |
588 | } | |
589 | ||
0538f759 AQ |
590 | /** |
591 | * batadv_neigh_node_new - create and init a new neigh_node object | |
3f32f8a6 | 592 | * @orig_node: originator object representing the neighbour |
0538f759 AQ |
593 | * @hard_iface: the interface where the neighbour is connected to |
594 | * @neigh_addr: the mac address of the neighbour interface | |
0538f759 AQ |
595 | * |
596 | * Allocates a new neigh_node object and initialises all the generic fields. | |
597 | * Returns the new object or NULL on failure. | |
598 | */ | |
56303d34 | 599 | struct batadv_neigh_node * |
3f32f8a6 ML |
600 | batadv_neigh_node_new(struct batadv_orig_node *orig_node, |
601 | struct batadv_hard_iface *hard_iface, | |
602 | const u8 *neigh_addr) | |
c6c8fea2 | 603 | { |
56303d34 | 604 | struct batadv_neigh_node *neigh_node; |
cef63419 | 605 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
c6c8fea2 | 606 | |
741aa06b ML |
607 | neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr); |
608 | if (neigh_node) | |
609 | goto out; | |
610 | ||
cef63419 ML |
611 | hardif_neigh = batadv_hardif_neigh_get_or_create(hard_iface, |
612 | neigh_addr); | |
613 | if (!hardif_neigh) | |
614 | goto out; | |
615 | ||
704509b8 | 616 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 617 | if (!neigh_node) |
7ae8b285 | 618 | goto out; |
c6c8fea2 | 619 | |
f729dc70 ML |
620 | if (!atomic_inc_not_zero(&hard_iface->refcount)) { |
621 | kfree(neigh_node); | |
622 | neigh_node = NULL; | |
623 | goto out; | |
624 | } | |
625 | ||
9591a79f | 626 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
627 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
628 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 629 | |
8fdd0153 | 630 | ether_addr_copy(neigh_node->addr, neigh_addr); |
0538f759 AQ |
631 | neigh_node->if_incoming = hard_iface; |
632 | neigh_node->orig_node = orig_node; | |
633 | ||
1605d0d6 ML |
634 | /* extra reference for return */ |
635 | atomic_set(&neigh_node->refcount, 2); | |
c6c8fea2 | 636 | |
741aa06b ML |
637 | spin_lock_bh(&orig_node->neigh_list_lock); |
638 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); | |
639 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
640 | ||
cef63419 ML |
641 | /* increment unique neighbor refcount */ |
642 | atomic_inc(&hardif_neigh->refcount); | |
643 | ||
741aa06b ML |
644 | batadv_dbg(BATADV_DBG_BATMAN, orig_node->bat_priv, |
645 | "Creating new neighbor %pM for orig_node %pM on interface %s\n", | |
646 | neigh_addr, orig_node->orig, hard_iface->net_dev->name); | |
647 | ||
7ae8b285 | 648 | out: |
cef63419 ML |
649 | if (hardif_neigh) |
650 | batadv_hardif_neigh_free_ref(hardif_neigh); | |
c6c8fea2 SE |
651 | return neigh_node; |
652 | } | |
653 | ||
7587405a ML |
654 | /** |
655 | * batadv_hardif_neigh_seq_print_text - print the single hop neighbour list | |
656 | * @seq: neighbour table seq_file struct | |
657 | * @offset: not used | |
658 | * | |
659 | * Always returns 0. | |
660 | */ | |
661 | int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset) | |
662 | { | |
663 | struct net_device *net_dev = (struct net_device *)seq->private; | |
664 | struct batadv_priv *bat_priv = netdev_priv(net_dev); | |
665 | struct batadv_hard_iface *primary_if; | |
666 | ||
667 | primary_if = batadv_seq_print_text_primary_if_get(seq); | |
668 | if (!primary_if) | |
669 | return 0; | |
670 | ||
671 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", | |
672 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, | |
673 | primary_if->net_dev->dev_addr, net_dev->name, | |
674 | bat_priv->bat_algo_ops->name); | |
675 | ||
676 | batadv_hardif_free_ref(primary_if); | |
677 | ||
678 | if (!bat_priv->bat_algo_ops->bat_neigh_print) { | |
679 | seq_puts(seq, | |
680 | "No printing function for this routing protocol\n"); | |
681 | return 0; | |
682 | } | |
683 | ||
684 | bat_priv->bat_algo_ops->bat_neigh_print(bat_priv, seq); | |
685 | return 0; | |
686 | } | |
687 | ||
7351a482 | 688 | /** |
2baa753c SE |
689 | * batadv_orig_ifinfo_release - release orig_ifinfo from lists and queue for |
690 | * free after rcu grace period | |
691 | * @orig_ifinfo: the orig_ifinfo object to release | |
7351a482 | 692 | */ |
2baa753c | 693 | static void batadv_orig_ifinfo_release(struct batadv_orig_ifinfo *orig_ifinfo) |
7351a482 | 694 | { |
000c8dff | 695 | struct batadv_neigh_node *router; |
7351a482 | 696 | |
7351a482 | 697 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
2baa753c | 698 | batadv_hardif_free_ref(orig_ifinfo->if_outgoing); |
7351a482 | 699 | |
000c8dff SW |
700 | /* this is the last reference to this object */ |
701 | router = rcu_dereference_protected(orig_ifinfo->router, true); | |
702 | if (router) | |
2baa753c SE |
703 | batadv_neigh_node_free_ref(router); |
704 | ||
705 | kfree_rcu(orig_ifinfo, rcu); | |
7351a482 SW |
706 | } |
707 | ||
708 | /** | |
deed9660 SE |
709 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly release |
710 | * the orig_ifinfo | |
7351a482 SW |
711 | * @orig_ifinfo: the orig_ifinfo object to release |
712 | */ | |
deed9660 | 713 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) |
7351a482 SW |
714 | { |
715 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
2baa753c | 716 | batadv_orig_ifinfo_release(orig_ifinfo); |
7351a482 SW |
717 | } |
718 | ||
719 | /** | |
deed9660 SE |
720 | * batadv_orig_node_free_rcu - free the orig_node |
721 | * @rcu: rcu pointer of the orig_node | |
7351a482 | 722 | */ |
deed9660 | 723 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
7351a482 | 724 | { |
deed9660 SE |
725 | struct batadv_orig_node *orig_node; |
726 | ||
727 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); | |
728 | ||
729 | batadv_mcast_purge_orig(orig_node); | |
730 | ||
731 | batadv_frag_purge_orig(orig_node, NULL); | |
732 | ||
733 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) | |
734 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
735 | ||
736 | kfree(orig_node->tt_buff); | |
737 | kfree(orig_node); | |
7351a482 SW |
738 | } |
739 | ||
deed9660 SE |
740 | /** |
741 | * batadv_orig_node_release - release orig_node from lists and queue for | |
742 | * free after rcu grace period | |
743 | * @orig_node: the orig node to free | |
744 | */ | |
745 | static void batadv_orig_node_release(struct batadv_orig_node *orig_node) | |
c6c8fea2 | 746 | { |
b67bfe0d | 747 | struct hlist_node *node_tmp; |
f6c8b711 | 748 | struct batadv_neigh_node *neigh_node; |
7351a482 | 749 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 750 | |
f987ed6e ML |
751 | spin_lock_bh(&orig_node->neigh_list_lock); |
752 | ||
c6c8fea2 | 753 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 754 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 755 | &orig_node->neigh_list, list) { |
f987ed6e | 756 | hlist_del_rcu(&neigh_node->list); |
deed9660 | 757 | batadv_neigh_node_free_ref(neigh_node); |
c6c8fea2 SE |
758 | } |
759 | ||
7351a482 SW |
760 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
761 | &orig_node->ifinfo_list, list) { | |
762 | hlist_del_rcu(&orig_ifinfo->list); | |
deed9660 | 763 | batadv_orig_ifinfo_free_ref(orig_ifinfo); |
7351a482 | 764 | } |
f987ed6e ML |
765 | spin_unlock_bh(&orig_node->neigh_list_lock); |
766 | ||
d56b1705 MH |
767 | /* Free nc_nodes */ |
768 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
769 | ||
deed9660 | 770 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
c6c8fea2 SE |
771 | } |
772 | ||
72822225 LL |
773 | /** |
774 | * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly | |
deed9660 | 775 | * release it |
72822225 LL |
776 | * @orig_node: the orig node to free |
777 | */ | |
56303d34 | 778 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) |
7b36e8ee ML |
779 | { |
780 | if (atomic_dec_and_test(&orig_node->refcount)) | |
deed9660 | 781 | batadv_orig_node_release(orig_node); |
7b36e8ee ML |
782 | } |
783 | ||
56303d34 | 784 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 785 | { |
5bf74e9c | 786 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 787 | struct hlist_node *node_tmp; |
16b1aba8 | 788 | struct hlist_head *head; |
16b1aba8 | 789 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 790 | struct batadv_orig_node *orig_node; |
6b5e971a | 791 | u32 i; |
16b1aba8 ML |
792 | |
793 | if (!hash) | |
c6c8fea2 SE |
794 | return; |
795 | ||
796 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
797 | ||
c6c8fea2 | 798 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
799 | |
800 | for (i = 0; i < hash->size; i++) { | |
801 | head = &hash->table[i]; | |
802 | list_lock = &hash->list_locks[i]; | |
803 | ||
804 | spin_lock_bh(list_lock); | |
b67bfe0d | 805 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 806 | head, hash_entry) { |
b67bfe0d | 807 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 808 | batadv_orig_node_free_ref(orig_node); |
16b1aba8 ML |
809 | } |
810 | spin_unlock_bh(list_lock); | |
811 | } | |
812 | ||
1a8eaf07 | 813 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
814 | } |
815 | ||
bbad0a5e AQ |
816 | /** |
817 | * batadv_orig_node_new - creates a new orig_node | |
818 | * @bat_priv: the bat priv with all the soft interface information | |
819 | * @addr: the mac address of the originator | |
820 | * | |
821 | * Creates a new originator object and initialise all the generic fields. | |
822 | * The new object is not added to the originator list. | |
823 | * Returns the newly created object or NULL on failure. | |
9cfc7bd6 | 824 | */ |
bbad0a5e | 825 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
6b5e971a | 826 | const u8 *addr) |
c6c8fea2 | 827 | { |
56303d34 | 828 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 829 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 830 | unsigned long reset_time; |
bbad0a5e | 831 | int i; |
c6c8fea2 | 832 | |
39c75a51 SE |
833 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
834 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 835 | |
704509b8 | 836 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
837 | if (!orig_node) |
838 | return NULL; | |
839 | ||
9591a79f | 840 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
d0fa4f3f | 841 | INIT_HLIST_HEAD(&orig_node->vlan_list); |
7351a482 | 842 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 843 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 844 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 845 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 846 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 847 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 848 | |
d56b1705 MH |
849 | batadv_nc_init_orig(orig_node); |
850 | ||
7b36e8ee ML |
851 | /* extra reference for return */ |
852 | atomic_set(&orig_node->refcount, 2); | |
c6c8fea2 | 853 | |
16b1aba8 | 854 | orig_node->bat_priv = bat_priv; |
8fdd0153 | 855 | ether_addr_copy(orig_node->orig, addr); |
785ea114 | 856 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 857 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 858 | orig_node->tt_buff = NULL; |
a73105b8 | 859 | orig_node->tt_buff_len = 0; |
2c667a33 | 860 | orig_node->last_seen = jiffies; |
42d0b044 SE |
861 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
862 | orig_node->bcast_seqno_reset = reset_time; | |
8a4023c5 | 863 | |
60432d75 LL |
864 | #ifdef CONFIG_BATMAN_ADV_MCAST |
865 | orig_node->mcast_flags = BATADV_NO_FLAGS; | |
8a4023c5 LL |
866 | INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node); |
867 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node); | |
868 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node); | |
869 | spin_lock_init(&orig_node->mcast_handler_lock); | |
60432d75 | 870 | #endif |
c6c8fea2 | 871 | |
7ea7b4a1 AQ |
872 | /* create a vlan object for the "untagged" LAN */ |
873 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
874 | if (!vlan) | |
875 | goto free_orig_node; | |
876 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
877 | * Immediately release vlan since it is not needed anymore in this | |
878 | * context | |
879 | */ | |
880 | batadv_orig_node_vlan_free_ref(vlan); | |
881 | ||
610bfc6b MH |
882 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
883 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
884 | spin_lock_init(&orig_node->fragments[i].lock); | |
885 | orig_node->fragments[i].size = 0; | |
886 | } | |
887 | ||
c6c8fea2 | 888 | return orig_node; |
c6c8fea2 SE |
889 | free_orig_node: |
890 | kfree(orig_node); | |
891 | return NULL; | |
892 | } | |
893 | ||
709de13f SW |
894 | /** |
895 | * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor | |
896 | * @bat_priv: the bat priv with all the soft interface information | |
897 | * @neigh: orig node which is to be checked | |
898 | */ | |
899 | static void | |
900 | batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, | |
901 | struct batadv_neigh_node *neigh) | |
902 | { | |
903 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
904 | struct batadv_hard_iface *if_outgoing; | |
905 | struct hlist_node *node_tmp; | |
906 | ||
907 | spin_lock_bh(&neigh->ifinfo_lock); | |
908 | ||
909 | /* for all ifinfo objects for this neighinator */ | |
910 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
911 | &neigh->ifinfo_list, list) { | |
912 | if_outgoing = neigh_ifinfo->if_outgoing; | |
913 | ||
914 | /* always keep the default interface */ | |
915 | if (if_outgoing == BATADV_IF_DEFAULT) | |
916 | continue; | |
917 | ||
918 | /* don't purge if the interface is not (going) down */ | |
919 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
920 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
921 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
922 | continue; | |
923 | ||
924 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
925 | "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", | |
926 | neigh->addr, if_outgoing->net_dev->name); | |
927 | ||
928 | hlist_del_rcu(&neigh_ifinfo->list); | |
929 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
930 | } | |
931 | ||
932 | spin_unlock_bh(&neigh->ifinfo_lock); | |
933 | } | |
934 | ||
7351a482 SW |
935 | /** |
936 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
937 | * @bat_priv: the bat priv with all the soft interface information | |
938 | * @orig_node: orig node which is to be checked | |
939 | * | |
940 | * Returns true if any ifinfo entry was purged, false otherwise. | |
941 | */ | |
942 | static bool | |
943 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
944 | struct batadv_orig_node *orig_node) | |
945 | { | |
946 | struct batadv_orig_ifinfo *orig_ifinfo; | |
947 | struct batadv_hard_iface *if_outgoing; | |
948 | struct hlist_node *node_tmp; | |
949 | bool ifinfo_purged = false; | |
950 | ||
951 | spin_lock_bh(&orig_node->neigh_list_lock); | |
952 | ||
953 | /* for all ifinfo objects for this originator */ | |
954 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
955 | &orig_node->ifinfo_list, list) { | |
956 | if_outgoing = orig_ifinfo->if_outgoing; | |
957 | ||
958 | /* always keep the default interface */ | |
959 | if (if_outgoing == BATADV_IF_DEFAULT) | |
960 | continue; | |
961 | ||
962 | /* don't purge if the interface is not (going) down */ | |
963 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
964 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
965 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
966 | continue; | |
967 | ||
968 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
969 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
970 | orig_node->orig, if_outgoing->net_dev->name); | |
971 | ||
972 | ifinfo_purged = true; | |
973 | ||
974 | hlist_del_rcu(&orig_ifinfo->list); | |
975 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
f3b3d901 SW |
976 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
977 | orig_node->last_bonding_candidate = NULL; | |
978 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
979 | } | |
7351a482 SW |
980 | } |
981 | ||
982 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
983 | ||
984 | return ifinfo_purged; | |
985 | } | |
986 | ||
89652331 SW |
987 | /** |
988 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
989 | * @bat_priv: the bat priv with all the soft interface information | |
990 | * @orig_node: orig node which is to be checked | |
991 | * | |
992 | * Returns true if any neighbor was purged, false otherwise | |
993 | */ | |
56303d34 SE |
994 | static bool |
995 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 996 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 997 | { |
b67bfe0d | 998 | struct hlist_node *node_tmp; |
56303d34 | 999 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 1000 | bool neigh_purged = false; |
0b0094e0 | 1001 | unsigned long last_seen; |
56303d34 | 1002 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 1003 | |
f987ed6e ML |
1004 | spin_lock_bh(&orig_node->neigh_list_lock); |
1005 | ||
c6c8fea2 | 1006 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 1007 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 1008 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1009 | last_seen = neigh_node->last_seen; |
1010 | if_incoming = neigh_node->if_incoming; | |
1011 | ||
42d0b044 | 1012 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
1013 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
1014 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1015 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
1016 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
1017 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1018 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 1019 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1020 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
1021 | orig_node->orig, neigh_node->addr, | |
1022 | if_incoming->net_dev->name); | |
c6c8fea2 | 1023 | else |
39c75a51 | 1024 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1025 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
1026 | orig_node->orig, neigh_node->addr, | |
1027 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
1028 | |
1029 | neigh_purged = true; | |
9591a79f | 1030 | |
f987ed6e | 1031 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 1032 | batadv_neigh_node_free_ref(neigh_node); |
709de13f SW |
1033 | } else { |
1034 | /* only necessary if not the whole neighbor is to be | |
1035 | * deleted, but some interface has been removed. | |
1036 | */ | |
1037 | batadv_purge_neigh_ifinfo(bat_priv, neigh_node); | |
c6c8fea2 SE |
1038 | } |
1039 | } | |
f987ed6e ML |
1040 | |
1041 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
1042 | return neigh_purged; |
1043 | } | |
1044 | ||
89652331 SW |
1045 | /** |
1046 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
1047 | * @bat_priv: the bat priv with all the soft interface information | |
1048 | * @orig_node: orig node which is to be checked | |
1049 | * @if_outgoing: the interface for which the metric should be compared | |
1050 | * | |
1051 | * Returns the current best neighbor, with refcount increased. | |
1052 | */ | |
1053 | static struct batadv_neigh_node * | |
1054 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
1055 | struct batadv_orig_node *orig_node, | |
1056 | struct batadv_hard_iface *if_outgoing) | |
1057 | { | |
1058 | struct batadv_neigh_node *best = NULL, *neigh; | |
1059 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
1060 | ||
1061 | rcu_read_lock(); | |
1062 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
1063 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
1064 | best, if_outgoing) <= 0)) | |
1065 | continue; | |
1066 | ||
1067 | if (!atomic_inc_not_zero(&neigh->refcount)) | |
1068 | continue; | |
1069 | ||
1070 | if (best) | |
1071 | batadv_neigh_node_free_ref(best); | |
1072 | ||
1073 | best = neigh; | |
1074 | } | |
1075 | rcu_read_unlock(); | |
1076 | ||
1077 | return best; | |
1078 | } | |
1079 | ||
7351a482 SW |
1080 | /** |
1081 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
1082 | * @bat_priv: the bat priv with all the soft interface information | |
1083 | * @orig_node: orig node which is to be checked | |
1084 | * | |
1085 | * This function checks if the orig_node or substructures of it have become | |
1086 | * obsolete, and purges this information if that's the case. | |
1087 | * | |
1088 | * Returns true if the orig_node is to be removed, false otherwise. | |
1089 | */ | |
56303d34 SE |
1090 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
1091 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 1092 | { |
56303d34 | 1093 | struct batadv_neigh_node *best_neigh_node; |
7351a482 | 1094 | struct batadv_hard_iface *hard_iface; |
7b955a9f | 1095 | bool changed_ifinfo, changed_neigh; |
c6c8fea2 | 1096 | |
42d0b044 SE |
1097 | if (batadv_has_timed_out(orig_node->last_seen, |
1098 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 1099 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1100 | "Originator timeout: originator %pM, last_seen %u\n", |
1101 | orig_node->orig, | |
1102 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 1103 | return true; |
c6c8fea2 | 1104 | } |
7b955a9f SW |
1105 | changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
1106 | changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); | |
7351a482 | 1107 | |
7b955a9f | 1108 | if (!changed_ifinfo && !changed_neigh) |
89652331 SW |
1109 | return false; |
1110 | ||
7351a482 | 1111 | /* first for NULL ... */ |
89652331 SW |
1112 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
1113 | BATADV_IF_DEFAULT); | |
7351a482 SW |
1114 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
1115 | best_neigh_node); | |
89652331 SW |
1116 | if (best_neigh_node) |
1117 | batadv_neigh_node_free_ref(best_neigh_node); | |
c6c8fea2 | 1118 | |
7351a482 SW |
1119 | /* ... then for all other interfaces. */ |
1120 | rcu_read_lock(); | |
1121 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1122 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1123 | continue; | |
1124 | ||
1125 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1126 | continue; | |
1127 | ||
1128 | best_neigh_node = batadv_find_best_neighbor(bat_priv, | |
1129 | orig_node, | |
1130 | hard_iface); | |
1131 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
1132 | best_neigh_node); | |
1133 | if (best_neigh_node) | |
1134 | batadv_neigh_node_free_ref(best_neigh_node); | |
1135 | } | |
1136 | rcu_read_unlock(); | |
1137 | ||
c6c8fea2 SE |
1138 | return false; |
1139 | } | |
1140 | ||
56303d34 | 1141 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 1142 | { |
5bf74e9c | 1143 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 1144 | struct hlist_node *node_tmp; |
c6c8fea2 | 1145 | struct hlist_head *head; |
fb778ea1 | 1146 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 1147 | struct batadv_orig_node *orig_node; |
6b5e971a | 1148 | u32 i; |
c6c8fea2 SE |
1149 | |
1150 | if (!hash) | |
1151 | return; | |
1152 | ||
c6c8fea2 SE |
1153 | /* for all origins... */ |
1154 | for (i = 0; i < hash->size; i++) { | |
1155 | head = &hash->table[i]; | |
fb778ea1 | 1156 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1157 | |
fb778ea1 | 1158 | spin_lock_bh(list_lock); |
b67bfe0d | 1159 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 1160 | head, hash_entry) { |
03fc7f86 | 1161 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 1162 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 1163 | hlist_del_rcu(&orig_node->hash_entry); |
9d31b3ce LL |
1164 | batadv_tt_global_del_orig(orig_node->bat_priv, |
1165 | orig_node, -1, | |
1166 | "originator timed out"); | |
7d211efc | 1167 | batadv_orig_node_free_ref(orig_node); |
fb778ea1 | 1168 | continue; |
c6c8fea2 | 1169 | } |
610bfc6b MH |
1170 | |
1171 | batadv_frag_purge_orig(orig_node, | |
1172 | batadv_frag_check_entry); | |
c6c8fea2 | 1173 | } |
fb778ea1 | 1174 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
1175 | } |
1176 | ||
7cf06bc6 | 1177 | batadv_gw_election(bat_priv); |
c6c8fea2 SE |
1178 | } |
1179 | ||
03fc7f86 | 1180 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 1181 | { |
56303d34 SE |
1182 | struct delayed_work *delayed_work; |
1183 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1184 | |
56303d34 SE |
1185 | delayed_work = container_of(work, struct delayed_work, work); |
1186 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 1187 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
1188 | queue_delayed_work(batadv_event_workqueue, |
1189 | &bat_priv->orig_work, | |
1190 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
1191 | } |
1192 | ||
56303d34 | 1193 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 1194 | { |
03fc7f86 | 1195 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
1196 | } |
1197 | ||
7d211efc | 1198 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1199 | { |
1200 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1201 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 1202 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 1203 | |
30da63a6 ML |
1204 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1205 | if (!primary_if) | |
737a2a22 | 1206 | return 0; |
c6c8fea2 | 1207 | |
737a2a22 | 1208 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 1209 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
1210 | primary_if->net_dev->dev_addr, net_dev->name, |
1211 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 1212 | |
737a2a22 | 1213 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 1214 | |
737a2a22 AQ |
1215 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
1216 | seq_puts(seq, | |
1217 | "No printing function for this routing protocol\n"); | |
1218 | return 0; | |
c6c8fea2 SE |
1219 | } |
1220 | ||
cb1c92ec SW |
1221 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, |
1222 | BATADV_IF_DEFAULT); | |
c6c8fea2 | 1223 | |
30da63a6 | 1224 | return 0; |
c6c8fea2 SE |
1225 | } |
1226 | ||
cb1c92ec SW |
1227 | /** |
1228 | * batadv_orig_hardif_seq_print_text - writes originator infos for a specific | |
1229 | * outgoing interface | |
1230 | * @seq: debugfs table seq_file struct | |
1231 | * @offset: not used | |
1232 | * | |
1233 | * Returns 0 | |
1234 | */ | |
1235 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) | |
1236 | { | |
1237 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1238 | struct batadv_hard_iface *hard_iface; | |
1239 | struct batadv_priv *bat_priv; | |
1240 | ||
1241 | hard_iface = batadv_hardif_get_by_netdev(net_dev); | |
1242 | ||
1243 | if (!hard_iface || !hard_iface->soft_iface) { | |
1244 | seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); | |
1245 | goto out; | |
1246 | } | |
1247 | ||
1248 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
1249 | if (!bat_priv->bat_algo_ops->bat_orig_print) { | |
1250 | seq_puts(seq, | |
1251 | "No printing function for this routing protocol\n"); | |
1252 | goto out; | |
1253 | } | |
1254 | ||
1255 | if (hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1256 | seq_puts(seq, "Interface not active\n"); | |
1257 | goto out; | |
1258 | } | |
1259 | ||
1260 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", | |
1261 | BATADV_SOURCE_VERSION, hard_iface->net_dev->name, | |
1262 | hard_iface->net_dev->dev_addr, | |
1263 | hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); | |
1264 | ||
1265 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); | |
1266 | ||
1267 | out: | |
16a41423 ML |
1268 | if (hard_iface) |
1269 | batadv_hardif_free_ref(hard_iface); | |
cb1c92ec SW |
1270 | return 0; |
1271 | } | |
1272 | ||
56303d34 SE |
1273 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
1274 | int max_if_num) | |
c6c8fea2 | 1275 | { |
56303d34 | 1276 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 1277 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 1278 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1279 | struct hlist_head *head; |
56303d34 | 1280 | struct batadv_orig_node *orig_node; |
6b5e971a | 1281 | u32 i; |
c90681b8 | 1282 | int ret; |
c6c8fea2 SE |
1283 | |
1284 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1285 | * if_num |
1286 | */ | |
c6c8fea2 SE |
1287 | for (i = 0; i < hash->size; i++) { |
1288 | head = &hash->table[i]; | |
1289 | ||
fb778ea1 | 1290 | rcu_read_lock(); |
b67bfe0d | 1291 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1292 | ret = 0; |
1293 | if (bao->bat_orig_add_if) | |
1294 | ret = bao->bat_orig_add_if(orig_node, | |
1295 | max_if_num); | |
5346c35e | 1296 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1297 | goto err; |
1298 | } | |
fb778ea1 | 1299 | rcu_read_unlock(); |
c6c8fea2 SE |
1300 | } |
1301 | ||
c6c8fea2 SE |
1302 | return 0; |
1303 | ||
1304 | err: | |
fb778ea1 | 1305 | rcu_read_unlock(); |
c6c8fea2 SE |
1306 | return -ENOMEM; |
1307 | } | |
1308 | ||
56303d34 SE |
1309 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
1310 | int max_if_num) | |
c6c8fea2 | 1311 | { |
56303d34 | 1312 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 1313 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1314 | struct hlist_head *head; |
56303d34 SE |
1315 | struct batadv_hard_iface *hard_iface_tmp; |
1316 | struct batadv_orig_node *orig_node; | |
d0015fdd | 1317 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
6b5e971a | 1318 | u32 i; |
c90681b8 | 1319 | int ret; |
c6c8fea2 SE |
1320 | |
1321 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1322 | * if_num |
1323 | */ | |
c6c8fea2 SE |
1324 | for (i = 0; i < hash->size; i++) { |
1325 | head = &hash->table[i]; | |
1326 | ||
fb778ea1 | 1327 | rcu_read_lock(); |
b67bfe0d | 1328 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1329 | ret = 0; |
1330 | if (bao->bat_orig_del_if) | |
1331 | ret = bao->bat_orig_del_if(orig_node, | |
1332 | max_if_num, | |
1333 | hard_iface->if_num); | |
5346c35e | 1334 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1335 | goto err; |
1336 | } | |
fb778ea1 | 1337 | rcu_read_unlock(); |
c6c8fea2 SE |
1338 | } |
1339 | ||
1340 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1341 | rcu_read_lock(); | |
3193e8fd | 1342 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1343 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1344 | continue; |
1345 | ||
e6c10f43 | 1346 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1347 | continue; |
1348 | ||
e6c10f43 | 1349 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1350 | continue; |
1351 | ||
e6c10f43 ML |
1352 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1353 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1354 | } |
1355 | rcu_read_unlock(); | |
1356 | ||
e6c10f43 | 1357 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1358 | return 0; |
1359 | ||
1360 | err: | |
fb778ea1 | 1361 | rcu_read_unlock(); |
c6c8fea2 SE |
1362 | return -ENOMEM; |
1363 | } |