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0046b040 | 1 | /* Copyright (C) 2009-2016 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> | |
90f564df | 26 | #include <linux/kref.h> |
1e2c2a4f SE |
27 | #include <linux/list.h> |
28 | #include <linux/lockdep.h> | |
29 | #include <linux/netdevice.h> | |
d0fa4f3f | 30 | #include <linux/rculist.h> |
1e2c2a4f SE |
31 | #include <linux/seq_file.h> |
32 | #include <linux/slab.h> | |
33 | #include <linux/spinlock.h> | |
34 | #include <linux/workqueue.h> | |
35 | ||
785ea114 | 36 | #include "distributed-arp-table.h" |
1e2c2a4f | 37 | #include "fragmentation.h" |
c6c8fea2 SE |
38 | #include "gateway_client.h" |
39 | #include "hard-interface.h" | |
1e2c2a4f | 40 | #include "hash.h" |
60432d75 | 41 | #include "multicast.h" |
1e2c2a4f SE |
42 | #include "network-coding.h" |
43 | #include "routing.h" | |
44 | #include "translation-table.h" | |
c6c8fea2 | 45 | |
dec05074 AQ |
46 | /* hash class keys */ |
47 | static struct lock_class_key batadv_orig_hash_lock_class_key; | |
48 | ||
03fc7f86 | 49 | static void batadv_purge_orig(struct work_struct *work); |
c6c8fea2 | 50 | |
62fe710f | 51 | /** |
7afcbbef SE |
52 | * batadv_compare_orig - comparing function used in the originator hash table |
53 | * @node: node in the local table | |
54 | * @data2: second object to compare the node to | |
62fe710f SE |
55 | * |
56 | * Return: 1 if they are the same originator | |
57 | */ | |
bbad0a5e | 58 | int batadv_compare_orig(const struct hlist_node *node, const void *data2) |
b8e2dd13 | 59 | { |
56303d34 SE |
60 | const void *data1 = container_of(node, struct batadv_orig_node, |
61 | hash_entry); | |
b8e2dd13 | 62 | |
323813ed | 63 | return batadv_compare_eth(data1, data2); |
b8e2dd13 SE |
64 | } |
65 | ||
7ea7b4a1 AQ |
66 | /** |
67 | * batadv_orig_node_vlan_get - get an orig_node_vlan object | |
68 | * @orig_node: the originator serving the VLAN | |
69 | * @vid: the VLAN identifier | |
70 | * | |
62fe710f | 71 | * Return: the vlan object identified by vid and belonging to orig_node or NULL |
7ea7b4a1 AQ |
72 | * if it does not exist. |
73 | */ | |
74 | struct batadv_orig_node_vlan * | |
75 | batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, | |
76 | unsigned short vid) | |
77 | { | |
78 | struct batadv_orig_node_vlan *vlan = NULL, *tmp; | |
79 | ||
80 | rcu_read_lock(); | |
d0fa4f3f | 81 | hlist_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
82 | if (tmp->vid != vid) |
83 | continue; | |
84 | ||
85 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
86 | continue; | |
87 | ||
88 | vlan = tmp; | |
89 | ||
90 | break; | |
91 | } | |
92 | rcu_read_unlock(); | |
93 | ||
94 | return vlan; | |
95 | } | |
96 | ||
97 | /** | |
98 | * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan | |
99 | * object | |
100 | * @orig_node: the originator serving the VLAN | |
101 | * @vid: the VLAN identifier | |
102 | * | |
62fe710f | 103 | * Return: NULL in case of failure or the vlan object identified by vid and |
7ea7b4a1 AQ |
104 | * belonging to orig_node otherwise. The object is created and added to the list |
105 | * if it does not exist. | |
106 | * | |
107 | * The object is returned with refcounter increased by 1. | |
108 | */ | |
109 | struct batadv_orig_node_vlan * | |
110 | batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, | |
111 | unsigned short vid) | |
112 | { | |
113 | struct batadv_orig_node_vlan *vlan; | |
114 | ||
115 | spin_lock_bh(&orig_node->vlan_list_lock); | |
116 | ||
117 | /* first look if an object for this vid already exists */ | |
118 | vlan = batadv_orig_node_vlan_get(orig_node, vid); | |
119 | if (vlan) | |
120 | goto out; | |
121 | ||
122 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
123 | if (!vlan) | |
124 | goto out; | |
125 | ||
126 | atomic_set(&vlan->refcount, 2); | |
127 | vlan->vid = vid; | |
128 | ||
d0fa4f3f | 129 | hlist_add_head_rcu(&vlan->list, &orig_node->vlan_list); |
7ea7b4a1 AQ |
130 | |
131 | out: | |
132 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
133 | ||
134 | return vlan; | |
135 | } | |
136 | ||
137 | /** | |
138 | * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free | |
139 | * the originator-vlan object | |
140 | * @orig_vlan: the originator-vlan object to release | |
141 | */ | |
142 | void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan) | |
143 | { | |
144 | if (atomic_dec_and_test(&orig_vlan->refcount)) | |
145 | kfree_rcu(orig_vlan, rcu); | |
146 | } | |
147 | ||
56303d34 | 148 | int batadv_originator_init(struct batadv_priv *bat_priv) |
c6c8fea2 SE |
149 | { |
150 | if (bat_priv->orig_hash) | |
5346c35e | 151 | return 0; |
c6c8fea2 | 152 | |
1a8eaf07 | 153 | bat_priv->orig_hash = batadv_hash_new(1024); |
c6c8fea2 SE |
154 | |
155 | if (!bat_priv->orig_hash) | |
156 | goto err; | |
157 | ||
dec05074 AQ |
158 | batadv_hash_set_lock_class(bat_priv->orig_hash, |
159 | &batadv_orig_hash_lock_class_key); | |
160 | ||
72414442 AQ |
161 | INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig); |
162 | queue_delayed_work(batadv_event_workqueue, | |
163 | &bat_priv->orig_work, | |
164 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
165 | ||
5346c35e | 166 | return 0; |
c6c8fea2 SE |
167 | |
168 | err: | |
5346c35e | 169 | return -ENOMEM; |
c6c8fea2 SE |
170 | } |
171 | ||
89652331 | 172 | /** |
ae3e1e36 SE |
173 | * batadv_neigh_ifinfo_release - release neigh_ifinfo from lists and queue for |
174 | * free after rcu grace period | |
962c6832 | 175 | * @ref: kref pointer of the neigh_ifinfo |
89652331 | 176 | */ |
962c6832 | 177 | static void batadv_neigh_ifinfo_release(struct kref *ref) |
89652331 | 178 | { |
962c6832 SE |
179 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
180 | ||
181 | neigh_ifinfo = container_of(ref, struct batadv_neigh_ifinfo, refcount); | |
182 | ||
ae3e1e36 SE |
183 | if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
184 | batadv_hardif_free_ref(neigh_ifinfo->if_outgoing); | |
185 | ||
186 | kfree_rcu(neigh_ifinfo, rcu); | |
89652331 SW |
187 | } |
188 | ||
189 | /** | |
ae3e1e36 | 190 | * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly release |
89652331 SW |
191 | * the neigh_ifinfo |
192 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
193 | */ | |
194 | void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo) | |
195 | { | |
962c6832 | 196 | kref_put(&neigh_ifinfo->refcount, batadv_neigh_ifinfo_release); |
89652331 SW |
197 | } |
198 | ||
cef63419 | 199 | /** |
f6389692 SE |
200 | * batadv_hardif_neigh_release - release hardif neigh node from lists and |
201 | * queue for free after rcu grace period | |
90f564df | 202 | * @ref: kref pointer of the neigh_node |
cef63419 | 203 | */ |
90f564df | 204 | static void batadv_hardif_neigh_release(struct kref *ref) |
cef63419 | 205 | { |
90f564df SE |
206 | struct batadv_hardif_neigh_node *hardif_neigh; |
207 | ||
208 | hardif_neigh = container_of(ref, struct batadv_hardif_neigh_node, | |
209 | refcount); | |
210 | ||
f6389692 SE |
211 | spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock); |
212 | hlist_del_init_rcu(&hardif_neigh->list); | |
213 | spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock); | |
bab7c6c3 | 214 | |
f6389692 SE |
215 | batadv_hardif_free_ref(hardif_neigh->if_incoming); |
216 | kfree_rcu(hardif_neigh, rcu); | |
cef63419 ML |
217 | } |
218 | ||
219 | /** | |
220 | * batadv_hardif_neigh_free_ref - decrement the hardif neighbors refcounter | |
f6389692 | 221 | * and possibly release it |
cef63419 ML |
222 | * @hardif_neigh: hardif neigh neighbor to free |
223 | */ | |
224 | void batadv_hardif_neigh_free_ref(struct batadv_hardif_neigh_node *hardif_neigh) | |
225 | { | |
90f564df | 226 | kref_put(&hardif_neigh->refcount, batadv_hardif_neigh_release); |
cef63419 ML |
227 | } |
228 | ||
89652331 | 229 | /** |
b4d922cf SE |
230 | * batadv_neigh_node_release - release neigh_node from lists and queue for |
231 | * free after rcu grace period | |
77ae32e8 | 232 | * @ref: kref pointer of the neigh_node |
89652331 | 233 | */ |
77ae32e8 | 234 | static void batadv_neigh_node_release(struct kref *ref) |
89652331 SW |
235 | { |
236 | struct hlist_node *node_tmp; | |
77ae32e8 | 237 | struct batadv_neigh_node *neigh_node; |
cef63419 | 238 | struct batadv_hardif_neigh_node *hardif_neigh; |
89652331 | 239 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
bcef1f3c | 240 | struct batadv_algo_ops *bao; |
89652331 | 241 | |
77ae32e8 | 242 | neigh_node = container_of(ref, struct batadv_neigh_node, refcount); |
bcef1f3c | 243 | bao = neigh_node->orig_node->bat_priv->bat_algo_ops; |
89652331 SW |
244 | |
245 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
246 | &neigh_node->ifinfo_list, list) { | |
ae3e1e36 | 247 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); |
89652331 | 248 | } |
bcef1f3c | 249 | |
cef63419 ML |
250 | hardif_neigh = batadv_hardif_neigh_get(neigh_node->if_incoming, |
251 | neigh_node->addr); | |
252 | if (hardif_neigh) { | |
253 | /* batadv_hardif_neigh_get() increases refcount too */ | |
f6389692 SE |
254 | batadv_hardif_neigh_free_ref(hardif_neigh); |
255 | batadv_hardif_neigh_free_ref(hardif_neigh); | |
cef63419 ML |
256 | } |
257 | ||
bcef1f3c AQ |
258 | if (bao->bat_neigh_free) |
259 | bao->bat_neigh_free(neigh_node); | |
260 | ||
b4d922cf | 261 | batadv_hardif_free_ref(neigh_node->if_incoming); |
89652331 | 262 | |
b4d922cf | 263 | kfree_rcu(neigh_node, rcu); |
89652331 SW |
264 | } |
265 | ||
89652331 | 266 | /** |
77ae32e8 SE |
267 | * batadv_neigh_node_free_ref - decrement the neighbors refcounter and possibly |
268 | * release it | |
89652331 SW |
269 | * @neigh_node: neigh neighbor to free |
270 | */ | |
56303d34 | 271 | void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) |
a4c135c5 | 272 | { |
77ae32e8 | 273 | kref_put(&neigh_node->refcount, batadv_neigh_node_release); |
a4c135c5 SW |
274 | } |
275 | ||
7351a482 SW |
276 | /** |
277 | * batadv_orig_node_get_router - router to the originator depending on iface | |
278 | * @orig_node: the orig node for the router | |
279 | * @if_outgoing: the interface where the payload packet has been received or | |
280 | * the OGM should be sent to | |
281 | * | |
62fe710f | 282 | * Return: the neighbor which should be router for this orig_node/iface. |
7351a482 SW |
283 | * |
284 | * The object is returned with refcounter increased by 1. | |
285 | */ | |
56303d34 | 286 | struct batadv_neigh_node * |
7351a482 SW |
287 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
288 | const struct batadv_hard_iface *if_outgoing) | |
e1a5382f | 289 | { |
7351a482 SW |
290 | struct batadv_orig_ifinfo *orig_ifinfo; |
291 | struct batadv_neigh_node *router = NULL; | |
e1a5382f LL |
292 | |
293 | rcu_read_lock(); | |
7351a482 SW |
294 | hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { |
295 | if (orig_ifinfo->if_outgoing != if_outgoing) | |
296 | continue; | |
297 | ||
298 | router = rcu_dereference(orig_ifinfo->router); | |
299 | break; | |
300 | } | |
e1a5382f | 301 | |
77ae32e8 | 302 | if (router && !kref_get_unless_zero(&router->refcount)) |
e1a5382f LL |
303 | router = NULL; |
304 | ||
305 | rcu_read_unlock(); | |
306 | return router; | |
307 | } | |
308 | ||
7351a482 SW |
309 | /** |
310 | * batadv_orig_ifinfo_get - find the ifinfo from an orig_node | |
311 | * @orig_node: the orig node to be queried | |
312 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
313 | * | |
62fe710f | 314 | * Return: the requested orig_ifinfo or NULL if not found. |
7351a482 SW |
315 | * |
316 | * The object is returned with refcounter increased by 1. | |
317 | */ | |
318 | struct batadv_orig_ifinfo * | |
319 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
320 | struct batadv_hard_iface *if_outgoing) | |
321 | { | |
322 | struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; | |
323 | ||
324 | rcu_read_lock(); | |
325 | hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, | |
326 | list) { | |
327 | if (tmp->if_outgoing != if_outgoing) | |
328 | continue; | |
329 | ||
a6ba0d34 | 330 | if (!kref_get_unless_zero(&tmp->refcount)) |
7351a482 SW |
331 | continue; |
332 | ||
333 | orig_ifinfo = tmp; | |
334 | break; | |
335 | } | |
336 | rcu_read_unlock(); | |
337 | ||
338 | return orig_ifinfo; | |
339 | } | |
340 | ||
341 | /** | |
342 | * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object | |
343 | * @orig_node: the orig node to be queried | |
344 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
345 | * | |
62fe710f | 346 | * Return: NULL in case of failure or the orig_ifinfo object for the if_outgoing |
7351a482 SW |
347 | * interface otherwise. The object is created and added to the list |
348 | * if it does not exist. | |
349 | * | |
350 | * The object is returned with refcounter increased by 1. | |
351 | */ | |
352 | struct batadv_orig_ifinfo * | |
353 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
354 | struct batadv_hard_iface *if_outgoing) | |
355 | { | |
356 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; | |
357 | unsigned long reset_time; | |
358 | ||
359 | spin_lock_bh(&orig_node->neigh_list_lock); | |
360 | ||
361 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
362 | if (orig_ifinfo) | |
363 | goto out; | |
364 | ||
365 | orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); | |
366 | if (!orig_ifinfo) | |
367 | goto out; | |
368 | ||
369 | if (if_outgoing != BATADV_IF_DEFAULT && | |
7a659d56 | 370 | !kref_get_unless_zero(&if_outgoing->refcount)) { |
7351a482 SW |
371 | kfree(orig_ifinfo); |
372 | orig_ifinfo = NULL; | |
373 | goto out; | |
374 | } | |
375 | ||
376 | reset_time = jiffies - 1; | |
377 | reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); | |
378 | orig_ifinfo->batman_seqno_reset = reset_time; | |
379 | orig_ifinfo->if_outgoing = if_outgoing; | |
380 | INIT_HLIST_NODE(&orig_ifinfo->list); | |
a6ba0d34 SE |
381 | kref_init(&orig_ifinfo->refcount); |
382 | kref_get(&orig_ifinfo->refcount); | |
7351a482 SW |
383 | hlist_add_head_rcu(&orig_ifinfo->list, |
384 | &orig_node->ifinfo_list); | |
385 | out: | |
386 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
387 | return orig_ifinfo; | |
388 | } | |
389 | ||
89652331 SW |
390 | /** |
391 | * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node | |
e51f0397 | 392 | * @neigh: the neigh node to be queried |
89652331 SW |
393 | * @if_outgoing: the interface for which the ifinfo should be acquired |
394 | * | |
395 | * The object is returned with refcounter increased by 1. | |
396 | * | |
62fe710f | 397 | * Return: the requested neigh_ifinfo or NULL if not found |
89652331 SW |
398 | */ |
399 | struct batadv_neigh_ifinfo * | |
400 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
401 | struct batadv_hard_iface *if_outgoing) | |
402 | { | |
403 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, | |
404 | *tmp_neigh_ifinfo; | |
405 | ||
406 | rcu_read_lock(); | |
407 | hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, | |
408 | list) { | |
409 | if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) | |
410 | continue; | |
411 | ||
962c6832 | 412 | if (!kref_get_unless_zero(&tmp_neigh_ifinfo->refcount)) |
89652331 SW |
413 | continue; |
414 | ||
415 | neigh_ifinfo = tmp_neigh_ifinfo; | |
416 | break; | |
417 | } | |
418 | rcu_read_unlock(); | |
419 | ||
420 | return neigh_ifinfo; | |
421 | } | |
422 | ||
423 | /** | |
424 | * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object | |
e51f0397 | 425 | * @neigh: the neigh node to be queried |
89652331 SW |
426 | * @if_outgoing: the interface for which the ifinfo should be acquired |
427 | * | |
62fe710f | 428 | * Return: NULL in case of failure or the neigh_ifinfo object for the |
89652331 SW |
429 | * if_outgoing interface otherwise. The object is created and added to the list |
430 | * if it does not exist. | |
431 | * | |
432 | * The object is returned with refcounter increased by 1. | |
433 | */ | |
434 | struct batadv_neigh_ifinfo * | |
435 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
436 | struct batadv_hard_iface *if_outgoing) | |
437 | { | |
438 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
439 | ||
440 | spin_lock_bh(&neigh->ifinfo_lock); | |
441 | ||
442 | neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); | |
443 | if (neigh_ifinfo) | |
444 | goto out; | |
445 | ||
446 | neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); | |
447 | if (!neigh_ifinfo) | |
448 | goto out; | |
449 | ||
7a659d56 | 450 | if (if_outgoing && !kref_get_unless_zero(&if_outgoing->refcount)) { |
89652331 SW |
451 | kfree(neigh_ifinfo); |
452 | neigh_ifinfo = NULL; | |
453 | goto out; | |
454 | } | |
455 | ||
456 | INIT_HLIST_NODE(&neigh_ifinfo->list); | |
962c6832 SE |
457 | kref_init(&neigh_ifinfo->refcount); |
458 | kref_get(&neigh_ifinfo->refcount); | |
89652331 SW |
459 | neigh_ifinfo->if_outgoing = if_outgoing; |
460 | ||
461 | hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); | |
462 | ||
463 | out: | |
464 | spin_unlock_bh(&neigh->ifinfo_lock); | |
465 | ||
466 | return neigh_ifinfo; | |
467 | } | |
468 | ||
ed292663 ML |
469 | /** |
470 | * batadv_neigh_node_get - retrieve a neighbour from the list | |
471 | * @orig_node: originator which the neighbour belongs to | |
472 | * @hard_iface: the interface where this neighbour is connected to | |
473 | * @addr: the address of the neighbour | |
474 | * | |
475 | * Looks for and possibly returns a neighbour belonging to this originator list | |
476 | * which is connected through the provided hard interface. | |
62fe710f SE |
477 | * |
478 | * Return: neighbor when found. Othwerwise NULL | |
ed292663 ML |
479 | */ |
480 | static struct batadv_neigh_node * | |
481 | batadv_neigh_node_get(const struct batadv_orig_node *orig_node, | |
482 | const struct batadv_hard_iface *hard_iface, | |
483 | const u8 *addr) | |
484 | { | |
485 | struct batadv_neigh_node *tmp_neigh_node, *res = NULL; | |
486 | ||
487 | rcu_read_lock(); | |
488 | hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { | |
489 | if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) | |
490 | continue; | |
491 | ||
492 | if (tmp_neigh_node->if_incoming != hard_iface) | |
493 | continue; | |
494 | ||
77ae32e8 | 495 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
ed292663 ML |
496 | continue; |
497 | ||
498 | res = tmp_neigh_node; | |
499 | break; | |
500 | } | |
501 | rcu_read_unlock(); | |
502 | ||
503 | return res; | |
504 | } | |
505 | ||
cef63419 ML |
506 | /** |
507 | * batadv_hardif_neigh_create - create a hardif neighbour node | |
508 | * @hard_iface: the interface this neighbour is connected to | |
509 | * @neigh_addr: the interface address of the neighbour to retrieve | |
510 | * | |
62fe710f | 511 | * Return: the hardif neighbour node if found or created or NULL otherwise. |
cef63419 ML |
512 | */ |
513 | static struct batadv_hardif_neigh_node * | |
514 | batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface, | |
515 | const u8 *neigh_addr) | |
516 | { | |
8248a4c7 | 517 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
cef63419 ML |
518 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
519 | ||
520 | spin_lock_bh(&hard_iface->neigh_list_lock); | |
521 | ||
522 | /* check if neighbor hasn't been added in the meantime */ | |
523 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
524 | if (hardif_neigh) | |
525 | goto out; | |
526 | ||
7a659d56 | 527 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
cef63419 ML |
528 | goto out; |
529 | ||
530 | hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC); | |
531 | if (!hardif_neigh) { | |
532 | batadv_hardif_free_ref(hard_iface); | |
533 | goto out; | |
534 | } | |
535 | ||
536 | INIT_HLIST_NODE(&hardif_neigh->list); | |
537 | ether_addr_copy(hardif_neigh->addr, neigh_addr); | |
538 | hardif_neigh->if_incoming = hard_iface; | |
539 | hardif_neigh->last_seen = jiffies; | |
540 | ||
90f564df | 541 | kref_init(&hardif_neigh->refcount); |
cef63419 | 542 | |
8248a4c7 ML |
543 | if (bat_priv->bat_algo_ops->bat_hardif_neigh_init) |
544 | bat_priv->bat_algo_ops->bat_hardif_neigh_init(hardif_neigh); | |
545 | ||
cef63419 ML |
546 | hlist_add_head(&hardif_neigh->list, &hard_iface->neigh_list); |
547 | ||
548 | out: | |
549 | spin_unlock_bh(&hard_iface->neigh_list_lock); | |
550 | return hardif_neigh; | |
551 | } | |
552 | ||
553 | /** | |
554 | * batadv_hardif_neigh_get_or_create - retrieve or create a hardif neighbour | |
555 | * node | |
556 | * @hard_iface: the interface this neighbour is connected to | |
557 | * @neigh_addr: the interface address of the neighbour to retrieve | |
558 | * | |
62fe710f | 559 | * Return: the hardif neighbour node if found or created or NULL otherwise. |
cef63419 ML |
560 | */ |
561 | static struct batadv_hardif_neigh_node * | |
562 | batadv_hardif_neigh_get_or_create(struct batadv_hard_iface *hard_iface, | |
563 | const u8 *neigh_addr) | |
564 | { | |
565 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; | |
566 | ||
567 | /* first check without locking to avoid the overhead */ | |
568 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
569 | if (hardif_neigh) | |
570 | return hardif_neigh; | |
571 | ||
572 | return batadv_hardif_neigh_create(hard_iface, neigh_addr); | |
573 | } | |
574 | ||
575 | /** | |
576 | * batadv_hardif_neigh_get - retrieve a hardif neighbour from the list | |
577 | * @hard_iface: the interface where this neighbour is connected to | |
578 | * @neigh_addr: the address of the neighbour | |
579 | * | |
580 | * Looks for and possibly returns a neighbour belonging to this hard interface. | |
62fe710f SE |
581 | * |
582 | * Return: neighbor when found. Othwerwise NULL | |
cef63419 ML |
583 | */ |
584 | struct batadv_hardif_neigh_node * | |
585 | batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface, | |
586 | const u8 *neigh_addr) | |
587 | { | |
588 | struct batadv_hardif_neigh_node *tmp_hardif_neigh, *hardif_neigh = NULL; | |
589 | ||
590 | rcu_read_lock(); | |
591 | hlist_for_each_entry_rcu(tmp_hardif_neigh, | |
592 | &hard_iface->neigh_list, list) { | |
593 | if (!batadv_compare_eth(tmp_hardif_neigh->addr, neigh_addr)) | |
594 | continue; | |
595 | ||
90f564df | 596 | if (!kref_get_unless_zero(&tmp_hardif_neigh->refcount)) |
cef63419 ML |
597 | continue; |
598 | ||
599 | hardif_neigh = tmp_hardif_neigh; | |
600 | break; | |
601 | } | |
602 | rcu_read_unlock(); | |
603 | ||
604 | return hardif_neigh; | |
605 | } | |
606 | ||
0538f759 AQ |
607 | /** |
608 | * batadv_neigh_node_new - create and init a new neigh_node object | |
3f32f8a6 | 609 | * @orig_node: originator object representing the neighbour |
0538f759 AQ |
610 | * @hard_iface: the interface where the neighbour is connected to |
611 | * @neigh_addr: the mac address of the neighbour interface | |
0538f759 AQ |
612 | * |
613 | * Allocates a new neigh_node object and initialises all the generic fields. | |
62fe710f SE |
614 | * |
615 | * Return: neighbor when found. Othwerwise NULL | |
0538f759 | 616 | */ |
56303d34 | 617 | struct batadv_neigh_node * |
3f32f8a6 ML |
618 | batadv_neigh_node_new(struct batadv_orig_node *orig_node, |
619 | struct batadv_hard_iface *hard_iface, | |
620 | const u8 *neigh_addr) | |
c6c8fea2 | 621 | { |
56303d34 | 622 | struct batadv_neigh_node *neigh_node; |
cef63419 | 623 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
c6c8fea2 | 624 | |
741aa06b ML |
625 | neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr); |
626 | if (neigh_node) | |
627 | goto out; | |
628 | ||
cef63419 ML |
629 | hardif_neigh = batadv_hardif_neigh_get_or_create(hard_iface, |
630 | neigh_addr); | |
631 | if (!hardif_neigh) | |
632 | goto out; | |
633 | ||
704509b8 | 634 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 635 | if (!neigh_node) |
7ae8b285 | 636 | goto out; |
c6c8fea2 | 637 | |
7a659d56 | 638 | if (!kref_get_unless_zero(&hard_iface->refcount)) { |
f729dc70 ML |
639 | kfree(neigh_node); |
640 | neigh_node = NULL; | |
641 | goto out; | |
642 | } | |
643 | ||
9591a79f | 644 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
645 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
646 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 647 | |
8fdd0153 | 648 | ether_addr_copy(neigh_node->addr, neigh_addr); |
0538f759 AQ |
649 | neigh_node->if_incoming = hard_iface; |
650 | neigh_node->orig_node = orig_node; | |
651 | ||
1605d0d6 | 652 | /* extra reference for return */ |
77ae32e8 SE |
653 | kref_init(&neigh_node->refcount); |
654 | kref_get(&neigh_node->refcount); | |
c6c8fea2 | 655 | |
741aa06b ML |
656 | spin_lock_bh(&orig_node->neigh_list_lock); |
657 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); | |
658 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
659 | ||
cef63419 | 660 | /* increment unique neighbor refcount */ |
90f564df | 661 | kref_get(&hardif_neigh->refcount); |
cef63419 | 662 | |
741aa06b ML |
663 | batadv_dbg(BATADV_DBG_BATMAN, orig_node->bat_priv, |
664 | "Creating new neighbor %pM for orig_node %pM on interface %s\n", | |
665 | neigh_addr, orig_node->orig, hard_iface->net_dev->name); | |
666 | ||
7ae8b285 | 667 | out: |
cef63419 ML |
668 | if (hardif_neigh) |
669 | batadv_hardif_neigh_free_ref(hardif_neigh); | |
c6c8fea2 SE |
670 | return neigh_node; |
671 | } | |
672 | ||
7587405a ML |
673 | /** |
674 | * batadv_hardif_neigh_seq_print_text - print the single hop neighbour list | |
675 | * @seq: neighbour table seq_file struct | |
676 | * @offset: not used | |
677 | * | |
62fe710f | 678 | * Return: always 0 |
7587405a ML |
679 | */ |
680 | int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset) | |
681 | { | |
682 | struct net_device *net_dev = (struct net_device *)seq->private; | |
683 | struct batadv_priv *bat_priv = netdev_priv(net_dev); | |
684 | struct batadv_hard_iface *primary_if; | |
685 | ||
686 | primary_if = batadv_seq_print_text_primary_if_get(seq); | |
687 | if (!primary_if) | |
688 | return 0; | |
689 | ||
690 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", | |
691 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, | |
692 | primary_if->net_dev->dev_addr, net_dev->name, | |
693 | bat_priv->bat_algo_ops->name); | |
694 | ||
695 | batadv_hardif_free_ref(primary_if); | |
696 | ||
697 | if (!bat_priv->bat_algo_ops->bat_neigh_print) { | |
698 | seq_puts(seq, | |
699 | "No printing function for this routing protocol\n"); | |
700 | return 0; | |
701 | } | |
702 | ||
703 | bat_priv->bat_algo_ops->bat_neigh_print(bat_priv, seq); | |
704 | return 0; | |
705 | } | |
706 | ||
7351a482 | 707 | /** |
2baa753c SE |
708 | * batadv_orig_ifinfo_release - release orig_ifinfo from lists and queue for |
709 | * free after rcu grace period | |
a6ba0d34 | 710 | * @ref: kref pointer of the orig_ifinfo |
7351a482 | 711 | */ |
a6ba0d34 | 712 | static void batadv_orig_ifinfo_release(struct kref *ref) |
7351a482 | 713 | { |
a6ba0d34 | 714 | struct batadv_orig_ifinfo *orig_ifinfo; |
000c8dff | 715 | struct batadv_neigh_node *router; |
7351a482 | 716 | |
a6ba0d34 SE |
717 | orig_ifinfo = container_of(ref, struct batadv_orig_ifinfo, refcount); |
718 | ||
7351a482 | 719 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
2baa753c | 720 | batadv_hardif_free_ref(orig_ifinfo->if_outgoing); |
7351a482 | 721 | |
000c8dff SW |
722 | /* this is the last reference to this object */ |
723 | router = rcu_dereference_protected(orig_ifinfo->router, true); | |
724 | if (router) | |
2baa753c SE |
725 | batadv_neigh_node_free_ref(router); |
726 | ||
727 | kfree_rcu(orig_ifinfo, rcu); | |
7351a482 SW |
728 | } |
729 | ||
730 | /** | |
deed9660 SE |
731 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly release |
732 | * the orig_ifinfo | |
7351a482 SW |
733 | * @orig_ifinfo: the orig_ifinfo object to release |
734 | */ | |
deed9660 | 735 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) |
7351a482 | 736 | { |
a6ba0d34 | 737 | kref_put(&orig_ifinfo->refcount, batadv_orig_ifinfo_release); |
7351a482 SW |
738 | } |
739 | ||
740 | /** | |
deed9660 SE |
741 | * batadv_orig_node_free_rcu - free the orig_node |
742 | * @rcu: rcu pointer of the orig_node | |
7351a482 | 743 | */ |
deed9660 | 744 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
7351a482 | 745 | { |
deed9660 SE |
746 | struct batadv_orig_node *orig_node; |
747 | ||
748 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); | |
749 | ||
750 | batadv_mcast_purge_orig(orig_node); | |
751 | ||
752 | batadv_frag_purge_orig(orig_node, NULL); | |
753 | ||
754 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) | |
755 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
756 | ||
757 | kfree(orig_node->tt_buff); | |
758 | kfree(orig_node); | |
7351a482 SW |
759 | } |
760 | ||
deed9660 SE |
761 | /** |
762 | * batadv_orig_node_release - release orig_node from lists and queue for | |
763 | * free after rcu grace period | |
764 | * @orig_node: the orig node to free | |
765 | */ | |
766 | static void batadv_orig_node_release(struct batadv_orig_node *orig_node) | |
c6c8fea2 | 767 | { |
b67bfe0d | 768 | struct hlist_node *node_tmp; |
f6c8b711 | 769 | struct batadv_neigh_node *neigh_node; |
7351a482 | 770 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 771 | |
f987ed6e ML |
772 | spin_lock_bh(&orig_node->neigh_list_lock); |
773 | ||
c6c8fea2 | 774 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 775 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 776 | &orig_node->neigh_list, list) { |
f987ed6e | 777 | hlist_del_rcu(&neigh_node->list); |
deed9660 | 778 | batadv_neigh_node_free_ref(neigh_node); |
c6c8fea2 SE |
779 | } |
780 | ||
7351a482 SW |
781 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
782 | &orig_node->ifinfo_list, list) { | |
783 | hlist_del_rcu(&orig_ifinfo->list); | |
deed9660 | 784 | batadv_orig_ifinfo_free_ref(orig_ifinfo); |
7351a482 | 785 | } |
f987ed6e ML |
786 | spin_unlock_bh(&orig_node->neigh_list_lock); |
787 | ||
d56b1705 MH |
788 | /* Free nc_nodes */ |
789 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
790 | ||
deed9660 | 791 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
c6c8fea2 SE |
792 | } |
793 | ||
72822225 LL |
794 | /** |
795 | * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly | |
deed9660 | 796 | * release it |
72822225 LL |
797 | * @orig_node: the orig node to free |
798 | */ | |
56303d34 | 799 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) |
7b36e8ee ML |
800 | { |
801 | if (atomic_dec_and_test(&orig_node->refcount)) | |
deed9660 | 802 | batadv_orig_node_release(orig_node); |
7b36e8ee ML |
803 | } |
804 | ||
56303d34 | 805 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 806 | { |
5bf74e9c | 807 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 808 | struct hlist_node *node_tmp; |
16b1aba8 | 809 | struct hlist_head *head; |
16b1aba8 | 810 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 811 | struct batadv_orig_node *orig_node; |
6b5e971a | 812 | u32 i; |
16b1aba8 ML |
813 | |
814 | if (!hash) | |
c6c8fea2 SE |
815 | return; |
816 | ||
817 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
818 | ||
c6c8fea2 | 819 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
820 | |
821 | for (i = 0; i < hash->size; i++) { | |
822 | head = &hash->table[i]; | |
823 | list_lock = &hash->list_locks[i]; | |
824 | ||
825 | spin_lock_bh(list_lock); | |
b67bfe0d | 826 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 827 | head, hash_entry) { |
b67bfe0d | 828 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 829 | batadv_orig_node_free_ref(orig_node); |
16b1aba8 ML |
830 | } |
831 | spin_unlock_bh(list_lock); | |
832 | } | |
833 | ||
1a8eaf07 | 834 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
835 | } |
836 | ||
bbad0a5e AQ |
837 | /** |
838 | * batadv_orig_node_new - creates a new orig_node | |
839 | * @bat_priv: the bat priv with all the soft interface information | |
840 | * @addr: the mac address of the originator | |
841 | * | |
842 | * Creates a new originator object and initialise all the generic fields. | |
843 | * The new object is not added to the originator list. | |
62fe710f SE |
844 | * |
845 | * Return: the newly created object or NULL on failure. | |
9cfc7bd6 | 846 | */ |
bbad0a5e | 847 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
6b5e971a | 848 | const u8 *addr) |
c6c8fea2 | 849 | { |
56303d34 | 850 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 851 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 852 | unsigned long reset_time; |
bbad0a5e | 853 | int i; |
c6c8fea2 | 854 | |
39c75a51 SE |
855 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
856 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 857 | |
704509b8 | 858 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
859 | if (!orig_node) |
860 | return NULL; | |
861 | ||
9591a79f | 862 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
d0fa4f3f | 863 | INIT_HLIST_HEAD(&orig_node->vlan_list); |
7351a482 | 864 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 865 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 866 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 867 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 868 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 869 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 870 | |
d56b1705 MH |
871 | batadv_nc_init_orig(orig_node); |
872 | ||
7b36e8ee ML |
873 | /* extra reference for return */ |
874 | atomic_set(&orig_node->refcount, 2); | |
c6c8fea2 | 875 | |
16b1aba8 | 876 | orig_node->bat_priv = bat_priv; |
8fdd0153 | 877 | ether_addr_copy(orig_node->orig, addr); |
785ea114 | 878 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 879 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 880 | orig_node->tt_buff = NULL; |
a73105b8 | 881 | orig_node->tt_buff_len = 0; |
2c667a33 | 882 | orig_node->last_seen = jiffies; |
42d0b044 SE |
883 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
884 | orig_node->bcast_seqno_reset = reset_time; | |
8a4023c5 | 885 | |
60432d75 LL |
886 | #ifdef CONFIG_BATMAN_ADV_MCAST |
887 | orig_node->mcast_flags = BATADV_NO_FLAGS; | |
8a4023c5 LL |
888 | INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node); |
889 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node); | |
890 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node); | |
891 | spin_lock_init(&orig_node->mcast_handler_lock); | |
60432d75 | 892 | #endif |
c6c8fea2 | 893 | |
7ea7b4a1 AQ |
894 | /* create a vlan object for the "untagged" LAN */ |
895 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
896 | if (!vlan) | |
897 | goto free_orig_node; | |
898 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
899 | * Immediately release vlan since it is not needed anymore in this | |
900 | * context | |
901 | */ | |
902 | batadv_orig_node_vlan_free_ref(vlan); | |
903 | ||
610bfc6b MH |
904 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
905 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
906 | spin_lock_init(&orig_node->fragments[i].lock); | |
907 | orig_node->fragments[i].size = 0; | |
908 | } | |
909 | ||
c6c8fea2 | 910 | return orig_node; |
c6c8fea2 SE |
911 | free_orig_node: |
912 | kfree(orig_node); | |
913 | return NULL; | |
914 | } | |
915 | ||
709de13f SW |
916 | /** |
917 | * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor | |
918 | * @bat_priv: the bat priv with all the soft interface information | |
919 | * @neigh: orig node which is to be checked | |
920 | */ | |
921 | static void | |
922 | batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, | |
923 | struct batadv_neigh_node *neigh) | |
924 | { | |
925 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
926 | struct batadv_hard_iface *if_outgoing; | |
927 | struct hlist_node *node_tmp; | |
928 | ||
929 | spin_lock_bh(&neigh->ifinfo_lock); | |
930 | ||
931 | /* for all ifinfo objects for this neighinator */ | |
932 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
933 | &neigh->ifinfo_list, list) { | |
934 | if_outgoing = neigh_ifinfo->if_outgoing; | |
935 | ||
936 | /* always keep the default interface */ | |
937 | if (if_outgoing == BATADV_IF_DEFAULT) | |
938 | continue; | |
939 | ||
940 | /* don't purge if the interface is not (going) down */ | |
941 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
942 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
943 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
944 | continue; | |
945 | ||
946 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
947 | "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", | |
948 | neigh->addr, if_outgoing->net_dev->name); | |
949 | ||
950 | hlist_del_rcu(&neigh_ifinfo->list); | |
951 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
952 | } | |
953 | ||
954 | spin_unlock_bh(&neigh->ifinfo_lock); | |
955 | } | |
956 | ||
7351a482 SW |
957 | /** |
958 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
959 | * @bat_priv: the bat priv with all the soft interface information | |
960 | * @orig_node: orig node which is to be checked | |
961 | * | |
62fe710f | 962 | * Return: true if any ifinfo entry was purged, false otherwise. |
7351a482 SW |
963 | */ |
964 | static bool | |
965 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
966 | struct batadv_orig_node *orig_node) | |
967 | { | |
968 | struct batadv_orig_ifinfo *orig_ifinfo; | |
969 | struct batadv_hard_iface *if_outgoing; | |
970 | struct hlist_node *node_tmp; | |
971 | bool ifinfo_purged = false; | |
972 | ||
973 | spin_lock_bh(&orig_node->neigh_list_lock); | |
974 | ||
975 | /* for all ifinfo objects for this originator */ | |
976 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
977 | &orig_node->ifinfo_list, list) { | |
978 | if_outgoing = orig_ifinfo->if_outgoing; | |
979 | ||
980 | /* always keep the default interface */ | |
981 | if (if_outgoing == BATADV_IF_DEFAULT) | |
982 | continue; | |
983 | ||
984 | /* don't purge if the interface is not (going) down */ | |
985 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
986 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
987 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
988 | continue; | |
989 | ||
990 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
991 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
992 | orig_node->orig, if_outgoing->net_dev->name); | |
993 | ||
994 | ifinfo_purged = true; | |
995 | ||
996 | hlist_del_rcu(&orig_ifinfo->list); | |
997 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
f3b3d901 SW |
998 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
999 | orig_node->last_bonding_candidate = NULL; | |
1000 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
1001 | } | |
7351a482 SW |
1002 | } |
1003 | ||
1004 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
1005 | ||
1006 | return ifinfo_purged; | |
1007 | } | |
1008 | ||
89652331 SW |
1009 | /** |
1010 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
1011 | * @bat_priv: the bat priv with all the soft interface information | |
1012 | * @orig_node: orig node which is to be checked | |
1013 | * | |
62fe710f | 1014 | * Return: true if any neighbor was purged, false otherwise |
89652331 | 1015 | */ |
56303d34 SE |
1016 | static bool |
1017 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 1018 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 1019 | { |
b67bfe0d | 1020 | struct hlist_node *node_tmp; |
56303d34 | 1021 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 1022 | bool neigh_purged = false; |
0b0094e0 | 1023 | unsigned long last_seen; |
56303d34 | 1024 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 1025 | |
f987ed6e ML |
1026 | spin_lock_bh(&orig_node->neigh_list_lock); |
1027 | ||
c6c8fea2 | 1028 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 1029 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 1030 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1031 | last_seen = neigh_node->last_seen; |
1032 | if_incoming = neigh_node->if_incoming; | |
1033 | ||
42d0b044 | 1034 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
1035 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
1036 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1037 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
1038 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
1039 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1040 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 1041 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1042 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
1043 | orig_node->orig, neigh_node->addr, | |
1044 | if_incoming->net_dev->name); | |
c6c8fea2 | 1045 | else |
39c75a51 | 1046 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1047 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
1048 | orig_node->orig, neigh_node->addr, | |
1049 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
1050 | |
1051 | neigh_purged = true; | |
9591a79f | 1052 | |
f987ed6e | 1053 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 1054 | batadv_neigh_node_free_ref(neigh_node); |
709de13f SW |
1055 | } else { |
1056 | /* only necessary if not the whole neighbor is to be | |
1057 | * deleted, but some interface has been removed. | |
1058 | */ | |
1059 | batadv_purge_neigh_ifinfo(bat_priv, neigh_node); | |
c6c8fea2 SE |
1060 | } |
1061 | } | |
f987ed6e ML |
1062 | |
1063 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
1064 | return neigh_purged; |
1065 | } | |
1066 | ||
89652331 SW |
1067 | /** |
1068 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
1069 | * @bat_priv: the bat priv with all the soft interface information | |
1070 | * @orig_node: orig node which is to be checked | |
1071 | * @if_outgoing: the interface for which the metric should be compared | |
1072 | * | |
62fe710f | 1073 | * Return: the current best neighbor, with refcount increased. |
89652331 SW |
1074 | */ |
1075 | static struct batadv_neigh_node * | |
1076 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
1077 | struct batadv_orig_node *orig_node, | |
1078 | struct batadv_hard_iface *if_outgoing) | |
1079 | { | |
1080 | struct batadv_neigh_node *best = NULL, *neigh; | |
1081 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
1082 | ||
1083 | rcu_read_lock(); | |
1084 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
1085 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
1086 | best, if_outgoing) <= 0)) | |
1087 | continue; | |
1088 | ||
77ae32e8 | 1089 | if (!kref_get_unless_zero(&neigh->refcount)) |
89652331 SW |
1090 | continue; |
1091 | ||
1092 | if (best) | |
1093 | batadv_neigh_node_free_ref(best); | |
1094 | ||
1095 | best = neigh; | |
1096 | } | |
1097 | rcu_read_unlock(); | |
1098 | ||
1099 | return best; | |
1100 | } | |
1101 | ||
7351a482 SW |
1102 | /** |
1103 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
1104 | * @bat_priv: the bat priv with all the soft interface information | |
1105 | * @orig_node: orig node which is to be checked | |
1106 | * | |
1107 | * This function checks if the orig_node or substructures of it have become | |
1108 | * obsolete, and purges this information if that's the case. | |
1109 | * | |
62fe710f | 1110 | * Return: true if the orig_node is to be removed, false otherwise. |
7351a482 | 1111 | */ |
56303d34 SE |
1112 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
1113 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 1114 | { |
56303d34 | 1115 | struct batadv_neigh_node *best_neigh_node; |
7351a482 | 1116 | struct batadv_hard_iface *hard_iface; |
7b955a9f | 1117 | bool changed_ifinfo, changed_neigh; |
c6c8fea2 | 1118 | |
42d0b044 SE |
1119 | if (batadv_has_timed_out(orig_node->last_seen, |
1120 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 1121 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1122 | "Originator timeout: originator %pM, last_seen %u\n", |
1123 | orig_node->orig, | |
1124 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 1125 | return true; |
c6c8fea2 | 1126 | } |
7b955a9f SW |
1127 | changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
1128 | changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); | |
7351a482 | 1129 | |
7b955a9f | 1130 | if (!changed_ifinfo && !changed_neigh) |
89652331 SW |
1131 | return false; |
1132 | ||
7351a482 | 1133 | /* first for NULL ... */ |
89652331 SW |
1134 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
1135 | BATADV_IF_DEFAULT); | |
7351a482 SW |
1136 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
1137 | best_neigh_node); | |
89652331 SW |
1138 | if (best_neigh_node) |
1139 | batadv_neigh_node_free_ref(best_neigh_node); | |
c6c8fea2 | 1140 | |
7351a482 SW |
1141 | /* ... then for all other interfaces. */ |
1142 | rcu_read_lock(); | |
1143 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1144 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1145 | continue; | |
1146 | ||
1147 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1148 | continue; | |
1149 | ||
1150 | best_neigh_node = batadv_find_best_neighbor(bat_priv, | |
1151 | orig_node, | |
1152 | hard_iface); | |
1153 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
1154 | best_neigh_node); | |
1155 | if (best_neigh_node) | |
1156 | batadv_neigh_node_free_ref(best_neigh_node); | |
1157 | } | |
1158 | rcu_read_unlock(); | |
1159 | ||
c6c8fea2 SE |
1160 | return false; |
1161 | } | |
1162 | ||
56303d34 | 1163 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 1164 | { |
5bf74e9c | 1165 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 1166 | struct hlist_node *node_tmp; |
c6c8fea2 | 1167 | struct hlist_head *head; |
fb778ea1 | 1168 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 1169 | struct batadv_orig_node *orig_node; |
6b5e971a | 1170 | u32 i; |
c6c8fea2 SE |
1171 | |
1172 | if (!hash) | |
1173 | return; | |
1174 | ||
c6c8fea2 SE |
1175 | /* for all origins... */ |
1176 | for (i = 0; i < hash->size; i++) { | |
1177 | head = &hash->table[i]; | |
fb778ea1 | 1178 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1179 | |
fb778ea1 | 1180 | spin_lock_bh(list_lock); |
b67bfe0d | 1181 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 1182 | head, hash_entry) { |
03fc7f86 | 1183 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 1184 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 1185 | hlist_del_rcu(&orig_node->hash_entry); |
9d31b3ce LL |
1186 | batadv_tt_global_del_orig(orig_node->bat_priv, |
1187 | orig_node, -1, | |
1188 | "originator timed out"); | |
7d211efc | 1189 | batadv_orig_node_free_ref(orig_node); |
fb778ea1 | 1190 | continue; |
c6c8fea2 | 1191 | } |
610bfc6b MH |
1192 | |
1193 | batadv_frag_purge_orig(orig_node, | |
1194 | batadv_frag_check_entry); | |
c6c8fea2 | 1195 | } |
fb778ea1 | 1196 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
1197 | } |
1198 | ||
7cf06bc6 | 1199 | batadv_gw_election(bat_priv); |
c6c8fea2 SE |
1200 | } |
1201 | ||
03fc7f86 | 1202 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 1203 | { |
56303d34 SE |
1204 | struct delayed_work *delayed_work; |
1205 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1206 | |
56303d34 SE |
1207 | delayed_work = container_of(work, struct delayed_work, work); |
1208 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 1209 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
1210 | queue_delayed_work(batadv_event_workqueue, |
1211 | &bat_priv->orig_work, | |
1212 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
1213 | } |
1214 | ||
56303d34 | 1215 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 1216 | { |
03fc7f86 | 1217 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
1218 | } |
1219 | ||
7d211efc | 1220 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1221 | { |
1222 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1223 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 1224 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 1225 | |
30da63a6 ML |
1226 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1227 | if (!primary_if) | |
737a2a22 | 1228 | return 0; |
c6c8fea2 | 1229 | |
737a2a22 | 1230 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 1231 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
1232 | primary_if->net_dev->dev_addr, net_dev->name, |
1233 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 1234 | |
737a2a22 | 1235 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 1236 | |
737a2a22 AQ |
1237 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
1238 | seq_puts(seq, | |
1239 | "No printing function for this routing protocol\n"); | |
1240 | return 0; | |
c6c8fea2 SE |
1241 | } |
1242 | ||
cb1c92ec SW |
1243 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, |
1244 | BATADV_IF_DEFAULT); | |
c6c8fea2 | 1245 | |
30da63a6 | 1246 | return 0; |
c6c8fea2 SE |
1247 | } |
1248 | ||
cb1c92ec SW |
1249 | /** |
1250 | * batadv_orig_hardif_seq_print_text - writes originator infos for a specific | |
1251 | * outgoing interface | |
1252 | * @seq: debugfs table seq_file struct | |
1253 | * @offset: not used | |
1254 | * | |
62fe710f | 1255 | * Return: 0 |
cb1c92ec SW |
1256 | */ |
1257 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) | |
1258 | { | |
1259 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1260 | struct batadv_hard_iface *hard_iface; | |
1261 | struct batadv_priv *bat_priv; | |
1262 | ||
1263 | hard_iface = batadv_hardif_get_by_netdev(net_dev); | |
1264 | ||
1265 | if (!hard_iface || !hard_iface->soft_iface) { | |
1266 | seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); | |
1267 | goto out; | |
1268 | } | |
1269 | ||
1270 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
1271 | if (!bat_priv->bat_algo_ops->bat_orig_print) { | |
1272 | seq_puts(seq, | |
1273 | "No printing function for this routing protocol\n"); | |
1274 | goto out; | |
1275 | } | |
1276 | ||
1277 | if (hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1278 | seq_puts(seq, "Interface not active\n"); | |
1279 | goto out; | |
1280 | } | |
1281 | ||
1282 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", | |
1283 | BATADV_SOURCE_VERSION, hard_iface->net_dev->name, | |
1284 | hard_iface->net_dev->dev_addr, | |
1285 | hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); | |
1286 | ||
1287 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); | |
1288 | ||
1289 | out: | |
16a41423 ML |
1290 | if (hard_iface) |
1291 | batadv_hardif_free_ref(hard_iface); | |
cb1c92ec SW |
1292 | return 0; |
1293 | } | |
1294 | ||
56303d34 SE |
1295 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
1296 | int max_if_num) | |
c6c8fea2 | 1297 | { |
56303d34 | 1298 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 1299 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 1300 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1301 | struct hlist_head *head; |
56303d34 | 1302 | struct batadv_orig_node *orig_node; |
6b5e971a | 1303 | u32 i; |
c90681b8 | 1304 | int ret; |
c6c8fea2 SE |
1305 | |
1306 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1307 | * if_num |
1308 | */ | |
c6c8fea2 SE |
1309 | for (i = 0; i < hash->size; i++) { |
1310 | head = &hash->table[i]; | |
1311 | ||
fb778ea1 | 1312 | rcu_read_lock(); |
b67bfe0d | 1313 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1314 | ret = 0; |
1315 | if (bao->bat_orig_add_if) | |
1316 | ret = bao->bat_orig_add_if(orig_node, | |
1317 | max_if_num); | |
5346c35e | 1318 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1319 | goto err; |
1320 | } | |
fb778ea1 | 1321 | rcu_read_unlock(); |
c6c8fea2 SE |
1322 | } |
1323 | ||
c6c8fea2 SE |
1324 | return 0; |
1325 | ||
1326 | err: | |
fb778ea1 | 1327 | rcu_read_unlock(); |
c6c8fea2 SE |
1328 | return -ENOMEM; |
1329 | } | |
1330 | ||
56303d34 SE |
1331 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
1332 | int max_if_num) | |
c6c8fea2 | 1333 | { |
56303d34 | 1334 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 1335 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1336 | struct hlist_head *head; |
56303d34 SE |
1337 | struct batadv_hard_iface *hard_iface_tmp; |
1338 | struct batadv_orig_node *orig_node; | |
d0015fdd | 1339 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
6b5e971a | 1340 | u32 i; |
c90681b8 | 1341 | int ret; |
c6c8fea2 SE |
1342 | |
1343 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1344 | * if_num |
1345 | */ | |
c6c8fea2 SE |
1346 | for (i = 0; i < hash->size; i++) { |
1347 | head = &hash->table[i]; | |
1348 | ||
fb778ea1 | 1349 | rcu_read_lock(); |
b67bfe0d | 1350 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1351 | ret = 0; |
1352 | if (bao->bat_orig_del_if) | |
1353 | ret = bao->bat_orig_del_if(orig_node, | |
1354 | max_if_num, | |
1355 | hard_iface->if_num); | |
5346c35e | 1356 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1357 | goto err; |
1358 | } | |
fb778ea1 | 1359 | rcu_read_unlock(); |
c6c8fea2 SE |
1360 | } |
1361 | ||
1362 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1363 | rcu_read_lock(); | |
3193e8fd | 1364 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1365 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1366 | continue; |
1367 | ||
e6c10f43 | 1368 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1369 | continue; |
1370 | ||
e6c10f43 | 1371 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1372 | continue; |
1373 | ||
e6c10f43 ML |
1374 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1375 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1376 | } |
1377 | rcu_read_unlock(); | |
1378 | ||
e6c10f43 | 1379 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1380 | return 0; |
1381 | ||
1382 | err: | |
fb778ea1 | 1383 | rcu_read_unlock(); |
c6c8fea2 SE |
1384 | return -ENOMEM; |
1385 | } |