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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 | |
62fe710f | 50 | /** |
7afcbbef SE |
51 | * batadv_compare_orig - comparing function used in the originator hash table |
52 | * @node: node in the local table | |
53 | * @data2: second object to compare the node to | |
62fe710f SE |
54 | * |
55 | * Return: 1 if they are the same originator | |
56 | */ | |
bbad0a5e | 57 | int batadv_compare_orig(const struct hlist_node *node, const void *data2) |
b8e2dd13 | 58 | { |
56303d34 SE |
59 | const void *data1 = container_of(node, struct batadv_orig_node, |
60 | hash_entry); | |
b8e2dd13 | 61 | |
323813ed | 62 | return batadv_compare_eth(data1, data2); |
b8e2dd13 SE |
63 | } |
64 | ||
7ea7b4a1 AQ |
65 | /** |
66 | * batadv_orig_node_vlan_get - get an orig_node_vlan object | |
67 | * @orig_node: the originator serving the VLAN | |
68 | * @vid: the VLAN identifier | |
69 | * | |
62fe710f | 70 | * Return: the vlan object identified by vid and belonging to orig_node or NULL |
7ea7b4a1 AQ |
71 | * if it does not exist. |
72 | */ | |
73 | struct batadv_orig_node_vlan * | |
74 | batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, | |
75 | unsigned short vid) | |
76 | { | |
77 | struct batadv_orig_node_vlan *vlan = NULL, *tmp; | |
78 | ||
79 | rcu_read_lock(); | |
d0fa4f3f | 80 | hlist_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
81 | if (tmp->vid != vid) |
82 | continue; | |
83 | ||
84 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
85 | continue; | |
86 | ||
87 | vlan = tmp; | |
88 | ||
89 | break; | |
90 | } | |
91 | rcu_read_unlock(); | |
92 | ||
93 | return vlan; | |
94 | } | |
95 | ||
96 | /** | |
97 | * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan | |
98 | * object | |
99 | * @orig_node: the originator serving the VLAN | |
100 | * @vid: the VLAN identifier | |
101 | * | |
62fe710f | 102 | * Return: NULL in case of failure or the vlan object identified by vid and |
7ea7b4a1 AQ |
103 | * belonging to orig_node otherwise. The object is created and added to the list |
104 | * if it does not exist. | |
105 | * | |
106 | * The object is returned with refcounter increased by 1. | |
107 | */ | |
108 | struct batadv_orig_node_vlan * | |
109 | batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, | |
110 | unsigned short vid) | |
111 | { | |
112 | struct batadv_orig_node_vlan *vlan; | |
113 | ||
114 | spin_lock_bh(&orig_node->vlan_list_lock); | |
115 | ||
116 | /* first look if an object for this vid already exists */ | |
117 | vlan = batadv_orig_node_vlan_get(orig_node, vid); | |
118 | if (vlan) | |
119 | goto out; | |
120 | ||
121 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
122 | if (!vlan) | |
123 | goto out; | |
124 | ||
125 | atomic_set(&vlan->refcount, 2); | |
126 | vlan->vid = vid; | |
127 | ||
d0fa4f3f | 128 | hlist_add_head_rcu(&vlan->list, &orig_node->vlan_list); |
7ea7b4a1 AQ |
129 | |
130 | out: | |
131 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
132 | ||
133 | return vlan; | |
134 | } | |
135 | ||
136 | /** | |
137 | * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free | |
138 | * the originator-vlan object | |
139 | * @orig_vlan: the originator-vlan object to release | |
140 | */ | |
141 | void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan) | |
142 | { | |
143 | if (atomic_dec_and_test(&orig_vlan->refcount)) | |
144 | kfree_rcu(orig_vlan, rcu); | |
145 | } | |
146 | ||
56303d34 | 147 | int batadv_originator_init(struct batadv_priv *bat_priv) |
c6c8fea2 SE |
148 | { |
149 | if (bat_priv->orig_hash) | |
5346c35e | 150 | return 0; |
c6c8fea2 | 151 | |
1a8eaf07 | 152 | bat_priv->orig_hash = batadv_hash_new(1024); |
c6c8fea2 SE |
153 | |
154 | if (!bat_priv->orig_hash) | |
155 | goto err; | |
156 | ||
dec05074 AQ |
157 | batadv_hash_set_lock_class(bat_priv->orig_hash, |
158 | &batadv_orig_hash_lock_class_key); | |
159 | ||
72414442 AQ |
160 | INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig); |
161 | queue_delayed_work(batadv_event_workqueue, | |
162 | &bat_priv->orig_work, | |
163 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
164 | ||
5346c35e | 165 | return 0; |
c6c8fea2 SE |
166 | |
167 | err: | |
5346c35e | 168 | return -ENOMEM; |
c6c8fea2 SE |
169 | } |
170 | ||
89652331 | 171 | /** |
ae3e1e36 SE |
172 | * batadv_neigh_ifinfo_release - release neigh_ifinfo from lists and queue for |
173 | * free after rcu grace period | |
89652331 SW |
174 | * @neigh_ifinfo: the neigh_ifinfo object to release |
175 | */ | |
176 | static void | |
ae3e1e36 | 177 | batadv_neigh_ifinfo_release(struct batadv_neigh_ifinfo *neigh_ifinfo) |
89652331 | 178 | { |
ae3e1e36 SE |
179 | if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
180 | batadv_hardif_free_ref(neigh_ifinfo->if_outgoing); | |
181 | ||
182 | kfree_rcu(neigh_ifinfo, rcu); | |
89652331 SW |
183 | } |
184 | ||
185 | /** | |
ae3e1e36 | 186 | * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly release |
89652331 SW |
187 | * the neigh_ifinfo |
188 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
189 | */ | |
190 | void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo) | |
191 | { | |
192 | if (atomic_dec_and_test(&neigh_ifinfo->refcount)) | |
ae3e1e36 | 193 | batadv_neigh_ifinfo_release(neigh_ifinfo); |
89652331 SW |
194 | } |
195 | ||
cef63419 | 196 | /** |
f6389692 SE |
197 | * batadv_hardif_neigh_release - release hardif neigh node from lists and |
198 | * queue for free after rcu grace period | |
cef63419 ML |
199 | * @hardif_neigh: hardif neigh neighbor to free |
200 | */ | |
201 | static void | |
f6389692 | 202 | batadv_hardif_neigh_release(struct batadv_hardif_neigh_node *hardif_neigh) |
cef63419 | 203 | { |
f6389692 SE |
204 | spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock); |
205 | hlist_del_init_rcu(&hardif_neigh->list); | |
206 | spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock); | |
bab7c6c3 | 207 | |
f6389692 SE |
208 | batadv_hardif_free_ref(hardif_neigh->if_incoming); |
209 | kfree_rcu(hardif_neigh, rcu); | |
cef63419 ML |
210 | } |
211 | ||
212 | /** | |
213 | * batadv_hardif_neigh_free_ref - decrement the hardif neighbors refcounter | |
f6389692 | 214 | * and possibly release it |
cef63419 ML |
215 | * @hardif_neigh: hardif neigh neighbor to free |
216 | */ | |
217 | void batadv_hardif_neigh_free_ref(struct batadv_hardif_neigh_node *hardif_neigh) | |
218 | { | |
f6389692 SE |
219 | if (atomic_dec_and_test(&hardif_neigh->refcount)) |
220 | batadv_hardif_neigh_release(hardif_neigh); | |
cef63419 ML |
221 | } |
222 | ||
89652331 | 223 | /** |
b4d922cf SE |
224 | * batadv_neigh_node_release - release neigh_node from lists and queue for |
225 | * free after rcu grace period | |
226 | * @neigh_node: neigh neighbor to free | |
89652331 | 227 | */ |
b4d922cf | 228 | static void batadv_neigh_node_release(struct batadv_neigh_node *neigh_node) |
89652331 SW |
229 | { |
230 | struct hlist_node *node_tmp; | |
cef63419 | 231 | struct batadv_hardif_neigh_node *hardif_neigh; |
89652331 | 232 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
bcef1f3c | 233 | struct batadv_algo_ops *bao; |
89652331 | 234 | |
bcef1f3c | 235 | bao = neigh_node->orig_node->bat_priv->bat_algo_ops; |
89652331 SW |
236 | |
237 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
238 | &neigh_node->ifinfo_list, list) { | |
ae3e1e36 | 239 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); |
89652331 | 240 | } |
bcef1f3c | 241 | |
cef63419 ML |
242 | hardif_neigh = batadv_hardif_neigh_get(neigh_node->if_incoming, |
243 | neigh_node->addr); | |
244 | if (hardif_neigh) { | |
245 | /* batadv_hardif_neigh_get() increases refcount too */ | |
f6389692 SE |
246 | batadv_hardif_neigh_free_ref(hardif_neigh); |
247 | batadv_hardif_neigh_free_ref(hardif_neigh); | |
cef63419 ML |
248 | } |
249 | ||
bcef1f3c AQ |
250 | if (bao->bat_neigh_free) |
251 | bao->bat_neigh_free(neigh_node); | |
252 | ||
b4d922cf | 253 | batadv_hardif_free_ref(neigh_node->if_incoming); |
89652331 | 254 | |
b4d922cf | 255 | kfree_rcu(neigh_node, rcu); |
89652331 SW |
256 | } |
257 | ||
89652331 SW |
258 | /** |
259 | * batadv_neigh_node_free_ref - decrement the neighbors refcounter | |
2baa753c | 260 | * and possibly release it |
89652331 SW |
261 | * @neigh_node: neigh neighbor to free |
262 | */ | |
56303d34 | 263 | void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) |
a4c135c5 | 264 | { |
44524fcd | 265 | if (atomic_dec_and_test(&neigh_node->refcount)) |
b4d922cf | 266 | batadv_neigh_node_release(neigh_node); |
a4c135c5 SW |
267 | } |
268 | ||
7351a482 SW |
269 | /** |
270 | * batadv_orig_node_get_router - router to the originator depending on iface | |
271 | * @orig_node: the orig node for the router | |
272 | * @if_outgoing: the interface where the payload packet has been received or | |
273 | * the OGM should be sent to | |
274 | * | |
62fe710f | 275 | * Return: the neighbor which should be router for this orig_node/iface. |
7351a482 SW |
276 | * |
277 | * The object is returned with refcounter increased by 1. | |
278 | */ | |
56303d34 | 279 | struct batadv_neigh_node * |
7351a482 SW |
280 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
281 | const struct batadv_hard_iface *if_outgoing) | |
e1a5382f | 282 | { |
7351a482 SW |
283 | struct batadv_orig_ifinfo *orig_ifinfo; |
284 | struct batadv_neigh_node *router = NULL; | |
e1a5382f LL |
285 | |
286 | rcu_read_lock(); | |
7351a482 SW |
287 | hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { |
288 | if (orig_ifinfo->if_outgoing != if_outgoing) | |
289 | continue; | |
290 | ||
291 | router = rcu_dereference(orig_ifinfo->router); | |
292 | break; | |
293 | } | |
e1a5382f LL |
294 | |
295 | if (router && !atomic_inc_not_zero(&router->refcount)) | |
296 | router = NULL; | |
297 | ||
298 | rcu_read_unlock(); | |
299 | return router; | |
300 | } | |
301 | ||
7351a482 SW |
302 | /** |
303 | * batadv_orig_ifinfo_get - find the ifinfo from an orig_node | |
304 | * @orig_node: the orig node to be queried | |
305 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
306 | * | |
62fe710f | 307 | * Return: the requested orig_ifinfo or NULL if not found. |
7351a482 SW |
308 | * |
309 | * The object is returned with refcounter increased by 1. | |
310 | */ | |
311 | struct batadv_orig_ifinfo * | |
312 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
313 | struct batadv_hard_iface *if_outgoing) | |
314 | { | |
315 | struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; | |
316 | ||
317 | rcu_read_lock(); | |
318 | hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, | |
319 | list) { | |
320 | if (tmp->if_outgoing != if_outgoing) | |
321 | continue; | |
322 | ||
323 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
324 | continue; | |
325 | ||
326 | orig_ifinfo = tmp; | |
327 | break; | |
328 | } | |
329 | rcu_read_unlock(); | |
330 | ||
331 | return orig_ifinfo; | |
332 | } | |
333 | ||
334 | /** | |
335 | * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object | |
336 | * @orig_node: the orig node to be queried | |
337 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
338 | * | |
62fe710f | 339 | * Return: NULL in case of failure or the orig_ifinfo object for the if_outgoing |
7351a482 SW |
340 | * interface otherwise. The object is created and added to the list |
341 | * if it does not exist. | |
342 | * | |
343 | * The object is returned with refcounter increased by 1. | |
344 | */ | |
345 | struct batadv_orig_ifinfo * | |
346 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
347 | struct batadv_hard_iface *if_outgoing) | |
348 | { | |
349 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; | |
350 | unsigned long reset_time; | |
351 | ||
352 | spin_lock_bh(&orig_node->neigh_list_lock); | |
353 | ||
354 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
355 | if (orig_ifinfo) | |
356 | goto out; | |
357 | ||
358 | orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); | |
359 | if (!orig_ifinfo) | |
360 | goto out; | |
361 | ||
362 | if (if_outgoing != BATADV_IF_DEFAULT && | |
363 | !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
364 | kfree(orig_ifinfo); | |
365 | orig_ifinfo = NULL; | |
366 | goto out; | |
367 | } | |
368 | ||
369 | reset_time = jiffies - 1; | |
370 | reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); | |
371 | orig_ifinfo->batman_seqno_reset = reset_time; | |
372 | orig_ifinfo->if_outgoing = if_outgoing; | |
373 | INIT_HLIST_NODE(&orig_ifinfo->list); | |
374 | atomic_set(&orig_ifinfo->refcount, 2); | |
375 | hlist_add_head_rcu(&orig_ifinfo->list, | |
376 | &orig_node->ifinfo_list); | |
377 | out: | |
378 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
379 | return orig_ifinfo; | |
380 | } | |
381 | ||
89652331 SW |
382 | /** |
383 | * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node | |
e51f0397 | 384 | * @neigh: the neigh node to be queried |
89652331 SW |
385 | * @if_outgoing: the interface for which the ifinfo should be acquired |
386 | * | |
387 | * The object is returned with refcounter increased by 1. | |
388 | * | |
62fe710f | 389 | * Return: the requested neigh_ifinfo or NULL if not found |
89652331 SW |
390 | */ |
391 | struct batadv_neigh_ifinfo * | |
392 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
393 | struct batadv_hard_iface *if_outgoing) | |
394 | { | |
395 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, | |
396 | *tmp_neigh_ifinfo; | |
397 | ||
398 | rcu_read_lock(); | |
399 | hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, | |
400 | list) { | |
401 | if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) | |
402 | continue; | |
403 | ||
404 | if (!atomic_inc_not_zero(&tmp_neigh_ifinfo->refcount)) | |
405 | continue; | |
406 | ||
407 | neigh_ifinfo = tmp_neigh_ifinfo; | |
408 | break; | |
409 | } | |
410 | rcu_read_unlock(); | |
411 | ||
412 | return neigh_ifinfo; | |
413 | } | |
414 | ||
415 | /** | |
416 | * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object | |
e51f0397 | 417 | * @neigh: the neigh node to be queried |
89652331 SW |
418 | * @if_outgoing: the interface for which the ifinfo should be acquired |
419 | * | |
62fe710f | 420 | * Return: NULL in case of failure or the neigh_ifinfo object for the |
89652331 SW |
421 | * if_outgoing interface otherwise. The object is created and added to the list |
422 | * if it does not exist. | |
423 | * | |
424 | * The object is returned with refcounter increased by 1. | |
425 | */ | |
426 | struct batadv_neigh_ifinfo * | |
427 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
428 | struct batadv_hard_iface *if_outgoing) | |
429 | { | |
430 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
431 | ||
432 | spin_lock_bh(&neigh->ifinfo_lock); | |
433 | ||
434 | neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); | |
435 | if (neigh_ifinfo) | |
436 | goto out; | |
437 | ||
438 | neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); | |
439 | if (!neigh_ifinfo) | |
440 | goto out; | |
441 | ||
442 | if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) { | |
443 | kfree(neigh_ifinfo); | |
444 | neigh_ifinfo = NULL; | |
445 | goto out; | |
446 | } | |
447 | ||
448 | INIT_HLIST_NODE(&neigh_ifinfo->list); | |
449 | atomic_set(&neigh_ifinfo->refcount, 2); | |
450 | neigh_ifinfo->if_outgoing = if_outgoing; | |
451 | ||
452 | hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); | |
453 | ||
454 | out: | |
455 | spin_unlock_bh(&neigh->ifinfo_lock); | |
456 | ||
457 | return neigh_ifinfo; | |
458 | } | |
459 | ||
ed292663 ML |
460 | /** |
461 | * batadv_neigh_node_get - retrieve a neighbour from the list | |
462 | * @orig_node: originator which the neighbour belongs to | |
463 | * @hard_iface: the interface where this neighbour is connected to | |
464 | * @addr: the address of the neighbour | |
465 | * | |
466 | * Looks for and possibly returns a neighbour belonging to this originator list | |
467 | * which is connected through the provided hard interface. | |
62fe710f SE |
468 | * |
469 | * Return: neighbor when found. Othwerwise NULL | |
ed292663 ML |
470 | */ |
471 | static struct batadv_neigh_node * | |
472 | batadv_neigh_node_get(const struct batadv_orig_node *orig_node, | |
473 | const struct batadv_hard_iface *hard_iface, | |
474 | const u8 *addr) | |
475 | { | |
476 | struct batadv_neigh_node *tmp_neigh_node, *res = NULL; | |
477 | ||
478 | rcu_read_lock(); | |
479 | hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { | |
480 | if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) | |
481 | continue; | |
482 | ||
483 | if (tmp_neigh_node->if_incoming != hard_iface) | |
484 | continue; | |
485 | ||
486 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) | |
487 | continue; | |
488 | ||
489 | res = tmp_neigh_node; | |
490 | break; | |
491 | } | |
492 | rcu_read_unlock(); | |
493 | ||
494 | return res; | |
495 | } | |
496 | ||
cef63419 ML |
497 | /** |
498 | * batadv_hardif_neigh_create - create a hardif neighbour node | |
499 | * @hard_iface: the interface this neighbour is connected to | |
500 | * @neigh_addr: the interface address of the neighbour to retrieve | |
501 | * | |
62fe710f | 502 | * Return: the hardif neighbour node if found or created or NULL otherwise. |
cef63419 ML |
503 | */ |
504 | static struct batadv_hardif_neigh_node * | |
505 | batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface, | |
506 | const u8 *neigh_addr) | |
507 | { | |
8248a4c7 | 508 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
cef63419 ML |
509 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
510 | ||
511 | spin_lock_bh(&hard_iface->neigh_list_lock); | |
512 | ||
513 | /* check if neighbor hasn't been added in the meantime */ | |
514 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
515 | if (hardif_neigh) | |
516 | goto out; | |
517 | ||
518 | if (!atomic_inc_not_zero(&hard_iface->refcount)) | |
519 | goto out; | |
520 | ||
521 | hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC); | |
522 | if (!hardif_neigh) { | |
523 | batadv_hardif_free_ref(hard_iface); | |
524 | goto out; | |
525 | } | |
526 | ||
527 | INIT_HLIST_NODE(&hardif_neigh->list); | |
528 | ether_addr_copy(hardif_neigh->addr, neigh_addr); | |
529 | hardif_neigh->if_incoming = hard_iface; | |
530 | hardif_neigh->last_seen = jiffies; | |
531 | ||
532 | atomic_set(&hardif_neigh->refcount, 1); | |
533 | ||
8248a4c7 ML |
534 | if (bat_priv->bat_algo_ops->bat_hardif_neigh_init) |
535 | bat_priv->bat_algo_ops->bat_hardif_neigh_init(hardif_neigh); | |
536 | ||
cef63419 ML |
537 | hlist_add_head(&hardif_neigh->list, &hard_iface->neigh_list); |
538 | ||
539 | out: | |
540 | spin_unlock_bh(&hard_iface->neigh_list_lock); | |
541 | return hardif_neigh; | |
542 | } | |
543 | ||
544 | /** | |
545 | * batadv_hardif_neigh_get_or_create - retrieve or create a hardif neighbour | |
546 | * node | |
547 | * @hard_iface: the interface this neighbour is connected to | |
548 | * @neigh_addr: the interface address of the neighbour to retrieve | |
549 | * | |
62fe710f | 550 | * Return: the hardif neighbour node if found or created or NULL otherwise. |
cef63419 ML |
551 | */ |
552 | static struct batadv_hardif_neigh_node * | |
553 | batadv_hardif_neigh_get_or_create(struct batadv_hard_iface *hard_iface, | |
554 | const u8 *neigh_addr) | |
555 | { | |
556 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; | |
557 | ||
558 | /* first check without locking to avoid the overhead */ | |
559 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
560 | if (hardif_neigh) | |
561 | return hardif_neigh; | |
562 | ||
563 | return batadv_hardif_neigh_create(hard_iface, neigh_addr); | |
564 | } | |
565 | ||
566 | /** | |
567 | * batadv_hardif_neigh_get - retrieve a hardif neighbour from the list | |
568 | * @hard_iface: the interface where this neighbour is connected to | |
569 | * @neigh_addr: the address of the neighbour | |
570 | * | |
571 | * Looks for and possibly returns a neighbour belonging to this hard interface. | |
62fe710f SE |
572 | * |
573 | * Return: neighbor when found. Othwerwise NULL | |
cef63419 ML |
574 | */ |
575 | struct batadv_hardif_neigh_node * | |
576 | batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface, | |
577 | const u8 *neigh_addr) | |
578 | { | |
579 | struct batadv_hardif_neigh_node *tmp_hardif_neigh, *hardif_neigh = NULL; | |
580 | ||
581 | rcu_read_lock(); | |
582 | hlist_for_each_entry_rcu(tmp_hardif_neigh, | |
583 | &hard_iface->neigh_list, list) { | |
584 | if (!batadv_compare_eth(tmp_hardif_neigh->addr, neigh_addr)) | |
585 | continue; | |
586 | ||
587 | if (!atomic_inc_not_zero(&tmp_hardif_neigh->refcount)) | |
588 | continue; | |
589 | ||
590 | hardif_neigh = tmp_hardif_neigh; | |
591 | break; | |
592 | } | |
593 | rcu_read_unlock(); | |
594 | ||
595 | return hardif_neigh; | |
596 | } | |
597 | ||
0538f759 AQ |
598 | /** |
599 | * batadv_neigh_node_new - create and init a new neigh_node object | |
3f32f8a6 | 600 | * @orig_node: originator object representing the neighbour |
0538f759 AQ |
601 | * @hard_iface: the interface where the neighbour is connected to |
602 | * @neigh_addr: the mac address of the neighbour interface | |
0538f759 AQ |
603 | * |
604 | * Allocates a new neigh_node object and initialises all the generic fields. | |
62fe710f SE |
605 | * |
606 | * Return: neighbor when found. Othwerwise NULL | |
0538f759 | 607 | */ |
56303d34 | 608 | struct batadv_neigh_node * |
3f32f8a6 ML |
609 | batadv_neigh_node_new(struct batadv_orig_node *orig_node, |
610 | struct batadv_hard_iface *hard_iface, | |
611 | const u8 *neigh_addr) | |
c6c8fea2 | 612 | { |
56303d34 | 613 | struct batadv_neigh_node *neigh_node; |
cef63419 | 614 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
c6c8fea2 | 615 | |
741aa06b ML |
616 | neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr); |
617 | if (neigh_node) | |
618 | goto out; | |
619 | ||
cef63419 ML |
620 | hardif_neigh = batadv_hardif_neigh_get_or_create(hard_iface, |
621 | neigh_addr); | |
622 | if (!hardif_neigh) | |
623 | goto out; | |
624 | ||
704509b8 | 625 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 626 | if (!neigh_node) |
7ae8b285 | 627 | goto out; |
c6c8fea2 | 628 | |
f729dc70 ML |
629 | if (!atomic_inc_not_zero(&hard_iface->refcount)) { |
630 | kfree(neigh_node); | |
631 | neigh_node = NULL; | |
632 | goto out; | |
633 | } | |
634 | ||
9591a79f | 635 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
636 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
637 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 638 | |
8fdd0153 | 639 | ether_addr_copy(neigh_node->addr, neigh_addr); |
0538f759 AQ |
640 | neigh_node->if_incoming = hard_iface; |
641 | neigh_node->orig_node = orig_node; | |
642 | ||
1605d0d6 ML |
643 | /* extra reference for return */ |
644 | atomic_set(&neigh_node->refcount, 2); | |
c6c8fea2 | 645 | |
741aa06b ML |
646 | spin_lock_bh(&orig_node->neigh_list_lock); |
647 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); | |
648 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
649 | ||
cef63419 ML |
650 | /* increment unique neighbor refcount */ |
651 | atomic_inc(&hardif_neigh->refcount); | |
652 | ||
741aa06b ML |
653 | batadv_dbg(BATADV_DBG_BATMAN, orig_node->bat_priv, |
654 | "Creating new neighbor %pM for orig_node %pM on interface %s\n", | |
655 | neigh_addr, orig_node->orig, hard_iface->net_dev->name); | |
656 | ||
7ae8b285 | 657 | out: |
cef63419 ML |
658 | if (hardif_neigh) |
659 | batadv_hardif_neigh_free_ref(hardif_neigh); | |
c6c8fea2 SE |
660 | return neigh_node; |
661 | } | |
662 | ||
7587405a ML |
663 | /** |
664 | * batadv_hardif_neigh_seq_print_text - print the single hop neighbour list | |
665 | * @seq: neighbour table seq_file struct | |
666 | * @offset: not used | |
667 | * | |
62fe710f | 668 | * Return: always 0 |
7587405a ML |
669 | */ |
670 | int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset) | |
671 | { | |
672 | struct net_device *net_dev = (struct net_device *)seq->private; | |
673 | struct batadv_priv *bat_priv = netdev_priv(net_dev); | |
674 | struct batadv_hard_iface *primary_if; | |
675 | ||
676 | primary_if = batadv_seq_print_text_primary_if_get(seq); | |
677 | if (!primary_if) | |
678 | return 0; | |
679 | ||
680 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", | |
681 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, | |
682 | primary_if->net_dev->dev_addr, net_dev->name, | |
683 | bat_priv->bat_algo_ops->name); | |
684 | ||
685 | batadv_hardif_free_ref(primary_if); | |
686 | ||
687 | if (!bat_priv->bat_algo_ops->bat_neigh_print) { | |
688 | seq_puts(seq, | |
689 | "No printing function for this routing protocol\n"); | |
690 | return 0; | |
691 | } | |
692 | ||
693 | bat_priv->bat_algo_ops->bat_neigh_print(bat_priv, seq); | |
694 | return 0; | |
695 | } | |
696 | ||
7351a482 | 697 | /** |
2baa753c SE |
698 | * batadv_orig_ifinfo_release - release orig_ifinfo from lists and queue for |
699 | * free after rcu grace period | |
700 | * @orig_ifinfo: the orig_ifinfo object to release | |
7351a482 | 701 | */ |
2baa753c | 702 | static void batadv_orig_ifinfo_release(struct batadv_orig_ifinfo *orig_ifinfo) |
7351a482 | 703 | { |
000c8dff | 704 | struct batadv_neigh_node *router; |
7351a482 | 705 | |
7351a482 | 706 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
2baa753c | 707 | batadv_hardif_free_ref(orig_ifinfo->if_outgoing); |
7351a482 | 708 | |
000c8dff SW |
709 | /* this is the last reference to this object */ |
710 | router = rcu_dereference_protected(orig_ifinfo->router, true); | |
711 | if (router) | |
2baa753c SE |
712 | batadv_neigh_node_free_ref(router); |
713 | ||
714 | kfree_rcu(orig_ifinfo, rcu); | |
7351a482 SW |
715 | } |
716 | ||
717 | /** | |
deed9660 SE |
718 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly release |
719 | * the orig_ifinfo | |
7351a482 SW |
720 | * @orig_ifinfo: the orig_ifinfo object to release |
721 | */ | |
deed9660 | 722 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) |
7351a482 SW |
723 | { |
724 | if (atomic_dec_and_test(&orig_ifinfo->refcount)) | |
2baa753c | 725 | batadv_orig_ifinfo_release(orig_ifinfo); |
7351a482 SW |
726 | } |
727 | ||
728 | /** | |
deed9660 SE |
729 | * batadv_orig_node_free_rcu - free the orig_node |
730 | * @rcu: rcu pointer of the orig_node | |
7351a482 | 731 | */ |
deed9660 | 732 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
7351a482 | 733 | { |
deed9660 SE |
734 | struct batadv_orig_node *orig_node; |
735 | ||
736 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); | |
737 | ||
738 | batadv_mcast_purge_orig(orig_node); | |
739 | ||
740 | batadv_frag_purge_orig(orig_node, NULL); | |
741 | ||
742 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) | |
743 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
744 | ||
745 | kfree(orig_node->tt_buff); | |
746 | kfree(orig_node); | |
7351a482 SW |
747 | } |
748 | ||
deed9660 SE |
749 | /** |
750 | * batadv_orig_node_release - release orig_node from lists and queue for | |
751 | * free after rcu grace period | |
752 | * @orig_node: the orig node to free | |
753 | */ | |
754 | static void batadv_orig_node_release(struct batadv_orig_node *orig_node) | |
c6c8fea2 | 755 | { |
b67bfe0d | 756 | struct hlist_node *node_tmp; |
f6c8b711 | 757 | struct batadv_neigh_node *neigh_node; |
7351a482 | 758 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 759 | |
f987ed6e ML |
760 | spin_lock_bh(&orig_node->neigh_list_lock); |
761 | ||
c6c8fea2 | 762 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 763 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 764 | &orig_node->neigh_list, list) { |
f987ed6e | 765 | hlist_del_rcu(&neigh_node->list); |
deed9660 | 766 | batadv_neigh_node_free_ref(neigh_node); |
c6c8fea2 SE |
767 | } |
768 | ||
7351a482 SW |
769 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
770 | &orig_node->ifinfo_list, list) { | |
771 | hlist_del_rcu(&orig_ifinfo->list); | |
deed9660 | 772 | batadv_orig_ifinfo_free_ref(orig_ifinfo); |
7351a482 | 773 | } |
f987ed6e ML |
774 | spin_unlock_bh(&orig_node->neigh_list_lock); |
775 | ||
d56b1705 MH |
776 | /* Free nc_nodes */ |
777 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
778 | ||
deed9660 | 779 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
c6c8fea2 SE |
780 | } |
781 | ||
72822225 LL |
782 | /** |
783 | * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly | |
deed9660 | 784 | * release it |
72822225 LL |
785 | * @orig_node: the orig node to free |
786 | */ | |
56303d34 | 787 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) |
7b36e8ee ML |
788 | { |
789 | if (atomic_dec_and_test(&orig_node->refcount)) | |
deed9660 | 790 | batadv_orig_node_release(orig_node); |
7b36e8ee ML |
791 | } |
792 | ||
56303d34 | 793 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 794 | { |
5bf74e9c | 795 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 796 | struct hlist_node *node_tmp; |
16b1aba8 | 797 | struct hlist_head *head; |
16b1aba8 | 798 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 799 | struct batadv_orig_node *orig_node; |
6b5e971a | 800 | u32 i; |
16b1aba8 ML |
801 | |
802 | if (!hash) | |
c6c8fea2 SE |
803 | return; |
804 | ||
805 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
806 | ||
c6c8fea2 | 807 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
808 | |
809 | for (i = 0; i < hash->size; i++) { | |
810 | head = &hash->table[i]; | |
811 | list_lock = &hash->list_locks[i]; | |
812 | ||
813 | spin_lock_bh(list_lock); | |
b67bfe0d | 814 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 815 | head, hash_entry) { |
b67bfe0d | 816 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 817 | batadv_orig_node_free_ref(orig_node); |
16b1aba8 ML |
818 | } |
819 | spin_unlock_bh(list_lock); | |
820 | } | |
821 | ||
1a8eaf07 | 822 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
823 | } |
824 | ||
bbad0a5e AQ |
825 | /** |
826 | * batadv_orig_node_new - creates a new orig_node | |
827 | * @bat_priv: the bat priv with all the soft interface information | |
828 | * @addr: the mac address of the originator | |
829 | * | |
830 | * Creates a new originator object and initialise all the generic fields. | |
831 | * The new object is not added to the originator list. | |
62fe710f SE |
832 | * |
833 | * Return: the newly created object or NULL on failure. | |
9cfc7bd6 | 834 | */ |
bbad0a5e | 835 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
6b5e971a | 836 | const u8 *addr) |
c6c8fea2 | 837 | { |
56303d34 | 838 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 839 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 840 | unsigned long reset_time; |
bbad0a5e | 841 | int i; |
c6c8fea2 | 842 | |
39c75a51 SE |
843 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
844 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 845 | |
704509b8 | 846 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
847 | if (!orig_node) |
848 | return NULL; | |
849 | ||
9591a79f | 850 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
d0fa4f3f | 851 | INIT_HLIST_HEAD(&orig_node->vlan_list); |
7351a482 | 852 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 853 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 854 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 855 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 856 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 857 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 858 | |
d56b1705 MH |
859 | batadv_nc_init_orig(orig_node); |
860 | ||
7b36e8ee ML |
861 | /* extra reference for return */ |
862 | atomic_set(&orig_node->refcount, 2); | |
c6c8fea2 | 863 | |
16b1aba8 | 864 | orig_node->bat_priv = bat_priv; |
8fdd0153 | 865 | ether_addr_copy(orig_node->orig, addr); |
785ea114 | 866 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 867 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 868 | orig_node->tt_buff = NULL; |
a73105b8 | 869 | orig_node->tt_buff_len = 0; |
2c667a33 | 870 | orig_node->last_seen = jiffies; |
42d0b044 SE |
871 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
872 | orig_node->bcast_seqno_reset = reset_time; | |
8a4023c5 | 873 | |
60432d75 LL |
874 | #ifdef CONFIG_BATMAN_ADV_MCAST |
875 | orig_node->mcast_flags = BATADV_NO_FLAGS; | |
8a4023c5 LL |
876 | INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node); |
877 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node); | |
878 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node); | |
879 | spin_lock_init(&orig_node->mcast_handler_lock); | |
60432d75 | 880 | #endif |
c6c8fea2 | 881 | |
7ea7b4a1 AQ |
882 | /* create a vlan object for the "untagged" LAN */ |
883 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
884 | if (!vlan) | |
885 | goto free_orig_node; | |
886 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
887 | * Immediately release vlan since it is not needed anymore in this | |
888 | * context | |
889 | */ | |
890 | batadv_orig_node_vlan_free_ref(vlan); | |
891 | ||
610bfc6b MH |
892 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
893 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
894 | spin_lock_init(&orig_node->fragments[i].lock); | |
895 | orig_node->fragments[i].size = 0; | |
896 | } | |
897 | ||
c6c8fea2 | 898 | return orig_node; |
c6c8fea2 SE |
899 | free_orig_node: |
900 | kfree(orig_node); | |
901 | return NULL; | |
902 | } | |
903 | ||
709de13f SW |
904 | /** |
905 | * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor | |
906 | * @bat_priv: the bat priv with all the soft interface information | |
907 | * @neigh: orig node which is to be checked | |
908 | */ | |
909 | static void | |
910 | batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, | |
911 | struct batadv_neigh_node *neigh) | |
912 | { | |
913 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
914 | struct batadv_hard_iface *if_outgoing; | |
915 | struct hlist_node *node_tmp; | |
916 | ||
917 | spin_lock_bh(&neigh->ifinfo_lock); | |
918 | ||
919 | /* for all ifinfo objects for this neighinator */ | |
920 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
921 | &neigh->ifinfo_list, list) { | |
922 | if_outgoing = neigh_ifinfo->if_outgoing; | |
923 | ||
924 | /* always keep the default interface */ | |
925 | if (if_outgoing == BATADV_IF_DEFAULT) | |
926 | continue; | |
927 | ||
928 | /* don't purge if the interface is not (going) down */ | |
929 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
930 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
931 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
932 | continue; | |
933 | ||
934 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
935 | "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", | |
936 | neigh->addr, if_outgoing->net_dev->name); | |
937 | ||
938 | hlist_del_rcu(&neigh_ifinfo->list); | |
939 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
940 | } | |
941 | ||
942 | spin_unlock_bh(&neigh->ifinfo_lock); | |
943 | } | |
944 | ||
7351a482 SW |
945 | /** |
946 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
947 | * @bat_priv: the bat priv with all the soft interface information | |
948 | * @orig_node: orig node which is to be checked | |
949 | * | |
62fe710f | 950 | * Return: true if any ifinfo entry was purged, false otherwise. |
7351a482 SW |
951 | */ |
952 | static bool | |
953 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
954 | struct batadv_orig_node *orig_node) | |
955 | { | |
956 | struct batadv_orig_ifinfo *orig_ifinfo; | |
957 | struct batadv_hard_iface *if_outgoing; | |
958 | struct hlist_node *node_tmp; | |
959 | bool ifinfo_purged = false; | |
960 | ||
961 | spin_lock_bh(&orig_node->neigh_list_lock); | |
962 | ||
963 | /* for all ifinfo objects for this originator */ | |
964 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
965 | &orig_node->ifinfo_list, list) { | |
966 | if_outgoing = orig_ifinfo->if_outgoing; | |
967 | ||
968 | /* always keep the default interface */ | |
969 | if (if_outgoing == BATADV_IF_DEFAULT) | |
970 | continue; | |
971 | ||
972 | /* don't purge if the interface is not (going) down */ | |
973 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
974 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
975 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
976 | continue; | |
977 | ||
978 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
979 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
980 | orig_node->orig, if_outgoing->net_dev->name); | |
981 | ||
982 | ifinfo_purged = true; | |
983 | ||
984 | hlist_del_rcu(&orig_ifinfo->list); | |
985 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
f3b3d901 SW |
986 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
987 | orig_node->last_bonding_candidate = NULL; | |
988 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
989 | } | |
7351a482 SW |
990 | } |
991 | ||
992 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
993 | ||
994 | return ifinfo_purged; | |
995 | } | |
996 | ||
89652331 SW |
997 | /** |
998 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
999 | * @bat_priv: the bat priv with all the soft interface information | |
1000 | * @orig_node: orig node which is to be checked | |
1001 | * | |
62fe710f | 1002 | * Return: true if any neighbor was purged, false otherwise |
89652331 | 1003 | */ |
56303d34 SE |
1004 | static bool |
1005 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 1006 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 1007 | { |
b67bfe0d | 1008 | struct hlist_node *node_tmp; |
56303d34 | 1009 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 1010 | bool neigh_purged = false; |
0b0094e0 | 1011 | unsigned long last_seen; |
56303d34 | 1012 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 1013 | |
f987ed6e ML |
1014 | spin_lock_bh(&orig_node->neigh_list_lock); |
1015 | ||
c6c8fea2 | 1016 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 1017 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 1018 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1019 | last_seen = neigh_node->last_seen; |
1020 | if_incoming = neigh_node->if_incoming; | |
1021 | ||
42d0b044 | 1022 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
1023 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
1024 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1025 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
1026 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
1027 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1028 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 1029 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1030 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
1031 | orig_node->orig, neigh_node->addr, | |
1032 | if_incoming->net_dev->name); | |
c6c8fea2 | 1033 | else |
39c75a51 | 1034 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1035 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
1036 | orig_node->orig, neigh_node->addr, | |
1037 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
1038 | |
1039 | neigh_purged = true; | |
9591a79f | 1040 | |
f987ed6e | 1041 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 1042 | batadv_neigh_node_free_ref(neigh_node); |
709de13f SW |
1043 | } else { |
1044 | /* only necessary if not the whole neighbor is to be | |
1045 | * deleted, but some interface has been removed. | |
1046 | */ | |
1047 | batadv_purge_neigh_ifinfo(bat_priv, neigh_node); | |
c6c8fea2 SE |
1048 | } |
1049 | } | |
f987ed6e ML |
1050 | |
1051 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
1052 | return neigh_purged; |
1053 | } | |
1054 | ||
89652331 SW |
1055 | /** |
1056 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
1057 | * @bat_priv: the bat priv with all the soft interface information | |
1058 | * @orig_node: orig node which is to be checked | |
1059 | * @if_outgoing: the interface for which the metric should be compared | |
1060 | * | |
62fe710f | 1061 | * Return: the current best neighbor, with refcount increased. |
89652331 SW |
1062 | */ |
1063 | static struct batadv_neigh_node * | |
1064 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
1065 | struct batadv_orig_node *orig_node, | |
1066 | struct batadv_hard_iface *if_outgoing) | |
1067 | { | |
1068 | struct batadv_neigh_node *best = NULL, *neigh; | |
1069 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
1070 | ||
1071 | rcu_read_lock(); | |
1072 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
1073 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
1074 | best, if_outgoing) <= 0)) | |
1075 | continue; | |
1076 | ||
1077 | if (!atomic_inc_not_zero(&neigh->refcount)) | |
1078 | continue; | |
1079 | ||
1080 | if (best) | |
1081 | batadv_neigh_node_free_ref(best); | |
1082 | ||
1083 | best = neigh; | |
1084 | } | |
1085 | rcu_read_unlock(); | |
1086 | ||
1087 | return best; | |
1088 | } | |
1089 | ||
7351a482 SW |
1090 | /** |
1091 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
1092 | * @bat_priv: the bat priv with all the soft interface information | |
1093 | * @orig_node: orig node which is to be checked | |
1094 | * | |
1095 | * This function checks if the orig_node or substructures of it have become | |
1096 | * obsolete, and purges this information if that's the case. | |
1097 | * | |
62fe710f | 1098 | * Return: true if the orig_node is to be removed, false otherwise. |
7351a482 | 1099 | */ |
56303d34 SE |
1100 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
1101 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 1102 | { |
56303d34 | 1103 | struct batadv_neigh_node *best_neigh_node; |
7351a482 | 1104 | struct batadv_hard_iface *hard_iface; |
7b955a9f | 1105 | bool changed_ifinfo, changed_neigh; |
c6c8fea2 | 1106 | |
42d0b044 SE |
1107 | if (batadv_has_timed_out(orig_node->last_seen, |
1108 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 1109 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1110 | "Originator timeout: originator %pM, last_seen %u\n", |
1111 | orig_node->orig, | |
1112 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 1113 | return true; |
c6c8fea2 | 1114 | } |
7b955a9f SW |
1115 | changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
1116 | changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); | |
7351a482 | 1117 | |
7b955a9f | 1118 | if (!changed_ifinfo && !changed_neigh) |
89652331 SW |
1119 | return false; |
1120 | ||
7351a482 | 1121 | /* first for NULL ... */ |
89652331 SW |
1122 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
1123 | BATADV_IF_DEFAULT); | |
7351a482 SW |
1124 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
1125 | best_neigh_node); | |
89652331 SW |
1126 | if (best_neigh_node) |
1127 | batadv_neigh_node_free_ref(best_neigh_node); | |
c6c8fea2 | 1128 | |
7351a482 SW |
1129 | /* ... then for all other interfaces. */ |
1130 | rcu_read_lock(); | |
1131 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1132 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1133 | continue; | |
1134 | ||
1135 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1136 | continue; | |
1137 | ||
1138 | best_neigh_node = batadv_find_best_neighbor(bat_priv, | |
1139 | orig_node, | |
1140 | hard_iface); | |
1141 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
1142 | best_neigh_node); | |
1143 | if (best_neigh_node) | |
1144 | batadv_neigh_node_free_ref(best_neigh_node); | |
1145 | } | |
1146 | rcu_read_unlock(); | |
1147 | ||
c6c8fea2 SE |
1148 | return false; |
1149 | } | |
1150 | ||
56303d34 | 1151 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 1152 | { |
5bf74e9c | 1153 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 1154 | struct hlist_node *node_tmp; |
c6c8fea2 | 1155 | struct hlist_head *head; |
fb778ea1 | 1156 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 1157 | struct batadv_orig_node *orig_node; |
6b5e971a | 1158 | u32 i; |
c6c8fea2 SE |
1159 | |
1160 | if (!hash) | |
1161 | return; | |
1162 | ||
c6c8fea2 SE |
1163 | /* for all origins... */ |
1164 | for (i = 0; i < hash->size; i++) { | |
1165 | head = &hash->table[i]; | |
fb778ea1 | 1166 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1167 | |
fb778ea1 | 1168 | spin_lock_bh(list_lock); |
b67bfe0d | 1169 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 1170 | head, hash_entry) { |
03fc7f86 | 1171 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 1172 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 1173 | hlist_del_rcu(&orig_node->hash_entry); |
9d31b3ce LL |
1174 | batadv_tt_global_del_orig(orig_node->bat_priv, |
1175 | orig_node, -1, | |
1176 | "originator timed out"); | |
7d211efc | 1177 | batadv_orig_node_free_ref(orig_node); |
fb778ea1 | 1178 | continue; |
c6c8fea2 | 1179 | } |
610bfc6b MH |
1180 | |
1181 | batadv_frag_purge_orig(orig_node, | |
1182 | batadv_frag_check_entry); | |
c6c8fea2 | 1183 | } |
fb778ea1 | 1184 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
1185 | } |
1186 | ||
7cf06bc6 | 1187 | batadv_gw_election(bat_priv); |
c6c8fea2 SE |
1188 | } |
1189 | ||
03fc7f86 | 1190 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 1191 | { |
56303d34 SE |
1192 | struct delayed_work *delayed_work; |
1193 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1194 | |
56303d34 SE |
1195 | delayed_work = container_of(work, struct delayed_work, work); |
1196 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 1197 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
1198 | queue_delayed_work(batadv_event_workqueue, |
1199 | &bat_priv->orig_work, | |
1200 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
1201 | } |
1202 | ||
56303d34 | 1203 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 1204 | { |
03fc7f86 | 1205 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
1206 | } |
1207 | ||
7d211efc | 1208 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1209 | { |
1210 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1211 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 1212 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 1213 | |
30da63a6 ML |
1214 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1215 | if (!primary_if) | |
737a2a22 | 1216 | return 0; |
c6c8fea2 | 1217 | |
737a2a22 | 1218 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 1219 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
1220 | primary_if->net_dev->dev_addr, net_dev->name, |
1221 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 1222 | |
737a2a22 | 1223 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 1224 | |
737a2a22 AQ |
1225 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
1226 | seq_puts(seq, | |
1227 | "No printing function for this routing protocol\n"); | |
1228 | return 0; | |
c6c8fea2 SE |
1229 | } |
1230 | ||
cb1c92ec SW |
1231 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, |
1232 | BATADV_IF_DEFAULT); | |
c6c8fea2 | 1233 | |
30da63a6 | 1234 | return 0; |
c6c8fea2 SE |
1235 | } |
1236 | ||
cb1c92ec SW |
1237 | /** |
1238 | * batadv_orig_hardif_seq_print_text - writes originator infos for a specific | |
1239 | * outgoing interface | |
1240 | * @seq: debugfs table seq_file struct | |
1241 | * @offset: not used | |
1242 | * | |
62fe710f | 1243 | * Return: 0 |
cb1c92ec SW |
1244 | */ |
1245 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) | |
1246 | { | |
1247 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1248 | struct batadv_hard_iface *hard_iface; | |
1249 | struct batadv_priv *bat_priv; | |
1250 | ||
1251 | hard_iface = batadv_hardif_get_by_netdev(net_dev); | |
1252 | ||
1253 | if (!hard_iface || !hard_iface->soft_iface) { | |
1254 | seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); | |
1255 | goto out; | |
1256 | } | |
1257 | ||
1258 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
1259 | if (!bat_priv->bat_algo_ops->bat_orig_print) { | |
1260 | seq_puts(seq, | |
1261 | "No printing function for this routing protocol\n"); | |
1262 | goto out; | |
1263 | } | |
1264 | ||
1265 | if (hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1266 | seq_puts(seq, "Interface not active\n"); | |
1267 | goto out; | |
1268 | } | |
1269 | ||
1270 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", | |
1271 | BATADV_SOURCE_VERSION, hard_iface->net_dev->name, | |
1272 | hard_iface->net_dev->dev_addr, | |
1273 | hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); | |
1274 | ||
1275 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); | |
1276 | ||
1277 | out: | |
16a41423 ML |
1278 | if (hard_iface) |
1279 | batadv_hardif_free_ref(hard_iface); | |
cb1c92ec SW |
1280 | return 0; |
1281 | } | |
1282 | ||
56303d34 SE |
1283 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
1284 | int max_if_num) | |
c6c8fea2 | 1285 | { |
56303d34 | 1286 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 1287 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 1288 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1289 | struct hlist_head *head; |
56303d34 | 1290 | struct batadv_orig_node *orig_node; |
6b5e971a | 1291 | u32 i; |
c90681b8 | 1292 | int ret; |
c6c8fea2 SE |
1293 | |
1294 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1295 | * if_num |
1296 | */ | |
c6c8fea2 SE |
1297 | for (i = 0; i < hash->size; i++) { |
1298 | head = &hash->table[i]; | |
1299 | ||
fb778ea1 | 1300 | rcu_read_lock(); |
b67bfe0d | 1301 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1302 | ret = 0; |
1303 | if (bao->bat_orig_add_if) | |
1304 | ret = bao->bat_orig_add_if(orig_node, | |
1305 | max_if_num); | |
5346c35e | 1306 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1307 | goto err; |
1308 | } | |
fb778ea1 | 1309 | rcu_read_unlock(); |
c6c8fea2 SE |
1310 | } |
1311 | ||
c6c8fea2 SE |
1312 | return 0; |
1313 | ||
1314 | err: | |
fb778ea1 | 1315 | rcu_read_unlock(); |
c6c8fea2 SE |
1316 | return -ENOMEM; |
1317 | } | |
1318 | ||
56303d34 SE |
1319 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
1320 | int max_if_num) | |
c6c8fea2 | 1321 | { |
56303d34 | 1322 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 1323 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1324 | struct hlist_head *head; |
56303d34 SE |
1325 | struct batadv_hard_iface *hard_iface_tmp; |
1326 | struct batadv_orig_node *orig_node; | |
d0015fdd | 1327 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
6b5e971a | 1328 | u32 i; |
c90681b8 | 1329 | int ret; |
c6c8fea2 SE |
1330 | |
1331 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1332 | * if_num |
1333 | */ | |
c6c8fea2 SE |
1334 | for (i = 0; i < hash->size; i++) { |
1335 | head = &hash->table[i]; | |
1336 | ||
fb778ea1 | 1337 | rcu_read_lock(); |
b67bfe0d | 1338 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1339 | ret = 0; |
1340 | if (bao->bat_orig_del_if) | |
1341 | ret = bao->bat_orig_del_if(orig_node, | |
1342 | max_if_num, | |
1343 | hard_iface->if_num); | |
5346c35e | 1344 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1345 | goto err; |
1346 | } | |
fb778ea1 | 1347 | rcu_read_unlock(); |
c6c8fea2 SE |
1348 | } |
1349 | ||
1350 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1351 | rcu_read_lock(); | |
3193e8fd | 1352 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1353 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1354 | continue; |
1355 | ||
e6c10f43 | 1356 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1357 | continue; |
1358 | ||
e6c10f43 | 1359 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1360 | continue; |
1361 | ||
e6c10f43 ML |
1362 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1363 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1364 | } |
1365 | rcu_read_unlock(); | |
1366 | ||
e6c10f43 | 1367 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1368 | return 0; |
1369 | ||
1370 | err: | |
fb778ea1 | 1371 | rcu_read_unlock(); |
c6c8fea2 SE |
1372 | return -ENOMEM; |
1373 | } |