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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 | 20 | |
7c124391 | 21 | #include <linux/atomic.h> |
1e2c2a4f SE |
22 | #include <linux/errno.h> |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/jiffies.h> | |
26 | #include <linux/kernel.h> | |
90f564df | 27 | #include <linux/kref.h> |
1e2c2a4f SE |
28 | #include <linux/list.h> |
29 | #include <linux/lockdep.h> | |
30 | #include <linux/netdevice.h> | |
d0fa4f3f | 31 | #include <linux/rculist.h> |
1e2c2a4f SE |
32 | #include <linux/seq_file.h> |
33 | #include <linux/slab.h> | |
34 | #include <linux/spinlock.h> | |
35 | #include <linux/workqueue.h> | |
36 | ||
785ea114 | 37 | #include "distributed-arp-table.h" |
1e2c2a4f | 38 | #include "fragmentation.h" |
c6c8fea2 SE |
39 | #include "gateway_client.h" |
40 | #include "hard-interface.h" | |
1e2c2a4f | 41 | #include "hash.h" |
60432d75 | 42 | #include "multicast.h" |
1e2c2a4f SE |
43 | #include "network-coding.h" |
44 | #include "routing.h" | |
45 | #include "translation-table.h" | |
c6c8fea2 | 46 | |
dec05074 AQ |
47 | /* hash class keys */ |
48 | static struct lock_class_key batadv_orig_hash_lock_class_key; | |
49 | ||
03fc7f86 | 50 | static void batadv_purge_orig(struct work_struct *work); |
c6c8fea2 | 51 | |
62fe710f | 52 | /** |
7afcbbef SE |
53 | * batadv_compare_orig - comparing function used in the originator hash table |
54 | * @node: node in the local table | |
55 | * @data2: second object to compare the node to | |
62fe710f SE |
56 | * |
57 | * Return: 1 if they are the same originator | |
58 | */ | |
bbad0a5e | 59 | int batadv_compare_orig(const struct hlist_node *node, const void *data2) |
b8e2dd13 | 60 | { |
56303d34 SE |
61 | const void *data1 = container_of(node, struct batadv_orig_node, |
62 | hash_entry); | |
b8e2dd13 | 63 | |
323813ed | 64 | return batadv_compare_eth(data1, data2); |
b8e2dd13 SE |
65 | } |
66 | ||
7ea7b4a1 AQ |
67 | /** |
68 | * batadv_orig_node_vlan_get - get an orig_node_vlan object | |
69 | * @orig_node: the originator serving the VLAN | |
70 | * @vid: the VLAN identifier | |
71 | * | |
62fe710f | 72 | * Return: the vlan object identified by vid and belonging to orig_node or NULL |
7ea7b4a1 AQ |
73 | * if it does not exist. |
74 | */ | |
75 | struct batadv_orig_node_vlan * | |
76 | batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, | |
77 | unsigned short vid) | |
78 | { | |
79 | struct batadv_orig_node_vlan *vlan = NULL, *tmp; | |
80 | ||
81 | rcu_read_lock(); | |
d0fa4f3f | 82 | hlist_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
83 | if (tmp->vid != vid) |
84 | continue; | |
85 | ||
161a3be9 | 86 | if (!kref_get_unless_zero(&tmp->refcount)) |
7ea7b4a1 AQ |
87 | continue; |
88 | ||
89 | vlan = tmp; | |
90 | ||
91 | break; | |
92 | } | |
93 | rcu_read_unlock(); | |
94 | ||
95 | return vlan; | |
96 | } | |
97 | ||
98 | /** | |
99 | * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan | |
100 | * object | |
101 | * @orig_node: the originator serving the VLAN | |
102 | * @vid: the VLAN identifier | |
103 | * | |
62fe710f | 104 | * Return: NULL in case of failure or the vlan object identified by vid and |
7ea7b4a1 AQ |
105 | * belonging to orig_node otherwise. The object is created and added to the list |
106 | * if it does not exist. | |
107 | * | |
108 | * The object is returned with refcounter increased by 1. | |
109 | */ | |
110 | struct batadv_orig_node_vlan * | |
111 | batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, | |
112 | unsigned short vid) | |
113 | { | |
114 | struct batadv_orig_node_vlan *vlan; | |
115 | ||
116 | spin_lock_bh(&orig_node->vlan_list_lock); | |
117 | ||
118 | /* first look if an object for this vid already exists */ | |
119 | vlan = batadv_orig_node_vlan_get(orig_node, vid); | |
120 | if (vlan) | |
121 | goto out; | |
122 | ||
123 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
124 | if (!vlan) | |
125 | goto out; | |
126 | ||
161a3be9 SE |
127 | kref_init(&vlan->refcount); |
128 | kref_get(&vlan->refcount); | |
7ea7b4a1 AQ |
129 | vlan->vid = vid; |
130 | ||
d0fa4f3f | 131 | hlist_add_head_rcu(&vlan->list, &orig_node->vlan_list); |
7ea7b4a1 AQ |
132 | |
133 | out: | |
134 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
135 | ||
136 | return vlan; | |
137 | } | |
138 | ||
139 | /** | |
161a3be9 SE |
140 | * batadv_orig_node_vlan_release - release originator-vlan object from lists |
141 | * and queue for free after rcu grace period | |
142 | * @ref: kref pointer of the originator-vlan object | |
143 | */ | |
144 | static void batadv_orig_node_vlan_release(struct kref *ref) | |
145 | { | |
146 | struct batadv_orig_node_vlan *orig_vlan; | |
147 | ||
148 | orig_vlan = container_of(ref, struct batadv_orig_node_vlan, refcount); | |
149 | ||
150 | kfree_rcu(orig_vlan, rcu); | |
151 | } | |
152 | ||
153 | /** | |
21754e25 SE |
154 | * batadv_orig_node_vlan_put - decrement the refcounter and possibly release |
155 | * the originator-vlan object | |
7ea7b4a1 AQ |
156 | * @orig_vlan: the originator-vlan object to release |
157 | */ | |
21754e25 | 158 | void batadv_orig_node_vlan_put(struct batadv_orig_node_vlan *orig_vlan) |
7ea7b4a1 | 159 | { |
161a3be9 | 160 | kref_put(&orig_vlan->refcount, batadv_orig_node_vlan_release); |
7ea7b4a1 AQ |
161 | } |
162 | ||
56303d34 | 163 | int batadv_originator_init(struct batadv_priv *bat_priv) |
c6c8fea2 SE |
164 | { |
165 | if (bat_priv->orig_hash) | |
5346c35e | 166 | return 0; |
c6c8fea2 | 167 | |
1a8eaf07 | 168 | bat_priv->orig_hash = batadv_hash_new(1024); |
c6c8fea2 SE |
169 | |
170 | if (!bat_priv->orig_hash) | |
171 | goto err; | |
172 | ||
dec05074 AQ |
173 | batadv_hash_set_lock_class(bat_priv->orig_hash, |
174 | &batadv_orig_hash_lock_class_key); | |
175 | ||
72414442 AQ |
176 | INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig); |
177 | queue_delayed_work(batadv_event_workqueue, | |
178 | &bat_priv->orig_work, | |
179 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
180 | ||
5346c35e | 181 | return 0; |
c6c8fea2 SE |
182 | |
183 | err: | |
5346c35e | 184 | return -ENOMEM; |
c6c8fea2 SE |
185 | } |
186 | ||
89652331 | 187 | /** |
ae3e1e36 SE |
188 | * batadv_neigh_ifinfo_release - release neigh_ifinfo from lists and queue for |
189 | * free after rcu grace period | |
962c6832 | 190 | * @ref: kref pointer of the neigh_ifinfo |
89652331 | 191 | */ |
962c6832 | 192 | static void batadv_neigh_ifinfo_release(struct kref *ref) |
89652331 | 193 | { |
962c6832 SE |
194 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
195 | ||
196 | neigh_ifinfo = container_of(ref, struct batadv_neigh_ifinfo, refcount); | |
197 | ||
ae3e1e36 | 198 | if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
82047ad7 | 199 | batadv_hardif_put(neigh_ifinfo->if_outgoing); |
ae3e1e36 SE |
200 | |
201 | kfree_rcu(neigh_ifinfo, rcu); | |
89652331 SW |
202 | } |
203 | ||
204 | /** | |
044fa3ae | 205 | * batadv_neigh_ifinfo_put - decrement the refcounter and possibly release |
89652331 SW |
206 | * the neigh_ifinfo |
207 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
208 | */ | |
044fa3ae | 209 | void batadv_neigh_ifinfo_put(struct batadv_neigh_ifinfo *neigh_ifinfo) |
89652331 | 210 | { |
962c6832 | 211 | kref_put(&neigh_ifinfo->refcount, batadv_neigh_ifinfo_release); |
89652331 SW |
212 | } |
213 | ||
cef63419 | 214 | /** |
f6389692 SE |
215 | * batadv_hardif_neigh_release - release hardif neigh node from lists and |
216 | * queue for free after rcu grace period | |
90f564df | 217 | * @ref: kref pointer of the neigh_node |
cef63419 | 218 | */ |
90f564df | 219 | static void batadv_hardif_neigh_release(struct kref *ref) |
cef63419 | 220 | { |
90f564df SE |
221 | struct batadv_hardif_neigh_node *hardif_neigh; |
222 | ||
223 | hardif_neigh = container_of(ref, struct batadv_hardif_neigh_node, | |
224 | refcount); | |
225 | ||
f6389692 SE |
226 | spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock); |
227 | hlist_del_init_rcu(&hardif_neigh->list); | |
228 | spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock); | |
bab7c6c3 | 229 | |
82047ad7 | 230 | batadv_hardif_put(hardif_neigh->if_incoming); |
f6389692 | 231 | kfree_rcu(hardif_neigh, rcu); |
cef63419 ML |
232 | } |
233 | ||
234 | /** | |
accadc35 | 235 | * batadv_hardif_neigh_put - decrement the hardif neighbors refcounter |
f6389692 | 236 | * and possibly release it |
cef63419 ML |
237 | * @hardif_neigh: hardif neigh neighbor to free |
238 | */ | |
accadc35 | 239 | void batadv_hardif_neigh_put(struct batadv_hardif_neigh_node *hardif_neigh) |
cef63419 | 240 | { |
90f564df | 241 | kref_put(&hardif_neigh->refcount, batadv_hardif_neigh_release); |
cef63419 ML |
242 | } |
243 | ||
89652331 | 244 | /** |
b4d922cf SE |
245 | * batadv_neigh_node_release - release neigh_node from lists and queue for |
246 | * free after rcu grace period | |
77ae32e8 | 247 | * @ref: kref pointer of the neigh_node |
89652331 | 248 | */ |
77ae32e8 | 249 | static void batadv_neigh_node_release(struct kref *ref) |
89652331 SW |
250 | { |
251 | struct hlist_node *node_tmp; | |
77ae32e8 | 252 | struct batadv_neigh_node *neigh_node; |
89652331 | 253 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
bcef1f3c | 254 | struct batadv_algo_ops *bao; |
89652331 | 255 | |
77ae32e8 | 256 | neigh_node = container_of(ref, struct batadv_neigh_node, refcount); |
bcef1f3c | 257 | bao = neigh_node->orig_node->bat_priv->bat_algo_ops; |
89652331 SW |
258 | |
259 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
260 | &neigh_node->ifinfo_list, list) { | |
044fa3ae | 261 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 262 | } |
bcef1f3c | 263 | |
abe59c65 | 264 | batadv_hardif_neigh_put(neigh_node->hardif_neigh); |
cef63419 | 265 | |
bcef1f3c AQ |
266 | if (bao->bat_neigh_free) |
267 | bao->bat_neigh_free(neigh_node); | |
268 | ||
82047ad7 | 269 | batadv_hardif_put(neigh_node->if_incoming); |
89652331 | 270 | |
b4d922cf | 271 | kfree_rcu(neigh_node, rcu); |
89652331 SW |
272 | } |
273 | ||
89652331 | 274 | /** |
25bb2509 | 275 | * batadv_neigh_node_put - decrement the neighbors refcounter and possibly |
77ae32e8 | 276 | * release it |
89652331 SW |
277 | * @neigh_node: neigh neighbor to free |
278 | */ | |
25bb2509 | 279 | void batadv_neigh_node_put(struct batadv_neigh_node *neigh_node) |
a4c135c5 | 280 | { |
77ae32e8 | 281 | kref_put(&neigh_node->refcount, batadv_neigh_node_release); |
a4c135c5 SW |
282 | } |
283 | ||
7351a482 SW |
284 | /** |
285 | * batadv_orig_node_get_router - router to the originator depending on iface | |
286 | * @orig_node: the orig node for the router | |
287 | * @if_outgoing: the interface where the payload packet has been received or | |
288 | * the OGM should be sent to | |
289 | * | |
62fe710f | 290 | * Return: the neighbor which should be router for this orig_node/iface. |
7351a482 SW |
291 | * |
292 | * The object is returned with refcounter increased by 1. | |
293 | */ | |
56303d34 | 294 | struct batadv_neigh_node * |
7351a482 SW |
295 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
296 | const struct batadv_hard_iface *if_outgoing) | |
e1a5382f | 297 | { |
7351a482 SW |
298 | struct batadv_orig_ifinfo *orig_ifinfo; |
299 | struct batadv_neigh_node *router = NULL; | |
e1a5382f LL |
300 | |
301 | rcu_read_lock(); | |
7351a482 SW |
302 | hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { |
303 | if (orig_ifinfo->if_outgoing != if_outgoing) | |
304 | continue; | |
305 | ||
306 | router = rcu_dereference(orig_ifinfo->router); | |
307 | break; | |
308 | } | |
e1a5382f | 309 | |
77ae32e8 | 310 | if (router && !kref_get_unless_zero(&router->refcount)) |
e1a5382f LL |
311 | router = NULL; |
312 | ||
313 | rcu_read_unlock(); | |
314 | return router; | |
315 | } | |
316 | ||
7351a482 SW |
317 | /** |
318 | * batadv_orig_ifinfo_get - find the ifinfo from an orig_node | |
319 | * @orig_node: the orig node to be queried | |
320 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
321 | * | |
62fe710f | 322 | * Return: the requested orig_ifinfo or NULL if not found. |
7351a482 SW |
323 | * |
324 | * The object is returned with refcounter increased by 1. | |
325 | */ | |
326 | struct batadv_orig_ifinfo * | |
327 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
328 | struct batadv_hard_iface *if_outgoing) | |
329 | { | |
330 | struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; | |
331 | ||
332 | rcu_read_lock(); | |
333 | hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, | |
334 | list) { | |
335 | if (tmp->if_outgoing != if_outgoing) | |
336 | continue; | |
337 | ||
a6ba0d34 | 338 | if (!kref_get_unless_zero(&tmp->refcount)) |
7351a482 SW |
339 | continue; |
340 | ||
341 | orig_ifinfo = tmp; | |
342 | break; | |
343 | } | |
344 | rcu_read_unlock(); | |
345 | ||
346 | return orig_ifinfo; | |
347 | } | |
348 | ||
349 | /** | |
350 | * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object | |
351 | * @orig_node: the orig node to be queried | |
352 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
353 | * | |
62fe710f | 354 | * Return: NULL in case of failure or the orig_ifinfo object for the if_outgoing |
7351a482 SW |
355 | * interface otherwise. The object is created and added to the list |
356 | * if it does not exist. | |
357 | * | |
358 | * The object is returned with refcounter increased by 1. | |
359 | */ | |
360 | struct batadv_orig_ifinfo * | |
361 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
362 | struct batadv_hard_iface *if_outgoing) | |
363 | { | |
364 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; | |
365 | unsigned long reset_time; | |
366 | ||
367 | spin_lock_bh(&orig_node->neigh_list_lock); | |
368 | ||
369 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
370 | if (orig_ifinfo) | |
371 | goto out; | |
372 | ||
373 | orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); | |
374 | if (!orig_ifinfo) | |
375 | goto out; | |
376 | ||
377 | if (if_outgoing != BATADV_IF_DEFAULT && | |
7a659d56 | 378 | !kref_get_unless_zero(&if_outgoing->refcount)) { |
7351a482 SW |
379 | kfree(orig_ifinfo); |
380 | orig_ifinfo = NULL; | |
381 | goto out; | |
382 | } | |
383 | ||
384 | reset_time = jiffies - 1; | |
385 | reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); | |
386 | orig_ifinfo->batman_seqno_reset = reset_time; | |
387 | orig_ifinfo->if_outgoing = if_outgoing; | |
388 | INIT_HLIST_NODE(&orig_ifinfo->list); | |
a6ba0d34 SE |
389 | kref_init(&orig_ifinfo->refcount); |
390 | kref_get(&orig_ifinfo->refcount); | |
7351a482 SW |
391 | hlist_add_head_rcu(&orig_ifinfo->list, |
392 | &orig_node->ifinfo_list); | |
393 | out: | |
394 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
395 | return orig_ifinfo; | |
396 | } | |
397 | ||
89652331 SW |
398 | /** |
399 | * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node | |
e51f0397 | 400 | * @neigh: the neigh node to be queried |
89652331 SW |
401 | * @if_outgoing: the interface for which the ifinfo should be acquired |
402 | * | |
403 | * The object is returned with refcounter increased by 1. | |
404 | * | |
62fe710f | 405 | * Return: the requested neigh_ifinfo or NULL if not found |
89652331 SW |
406 | */ |
407 | struct batadv_neigh_ifinfo * | |
408 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
409 | struct batadv_hard_iface *if_outgoing) | |
410 | { | |
411 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, | |
412 | *tmp_neigh_ifinfo; | |
413 | ||
414 | rcu_read_lock(); | |
415 | hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, | |
416 | list) { | |
417 | if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) | |
418 | continue; | |
419 | ||
962c6832 | 420 | if (!kref_get_unless_zero(&tmp_neigh_ifinfo->refcount)) |
89652331 SW |
421 | continue; |
422 | ||
423 | neigh_ifinfo = tmp_neigh_ifinfo; | |
424 | break; | |
425 | } | |
426 | rcu_read_unlock(); | |
427 | ||
428 | return neigh_ifinfo; | |
429 | } | |
430 | ||
431 | /** | |
432 | * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object | |
e51f0397 | 433 | * @neigh: the neigh node to be queried |
89652331 SW |
434 | * @if_outgoing: the interface for which the ifinfo should be acquired |
435 | * | |
62fe710f | 436 | * Return: NULL in case of failure or the neigh_ifinfo object for the |
89652331 SW |
437 | * if_outgoing interface otherwise. The object is created and added to the list |
438 | * if it does not exist. | |
439 | * | |
440 | * The object is returned with refcounter increased by 1. | |
441 | */ | |
442 | struct batadv_neigh_ifinfo * | |
443 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
444 | struct batadv_hard_iface *if_outgoing) | |
445 | { | |
446 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
447 | ||
448 | spin_lock_bh(&neigh->ifinfo_lock); | |
449 | ||
450 | neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); | |
451 | if (neigh_ifinfo) | |
452 | goto out; | |
453 | ||
454 | neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); | |
455 | if (!neigh_ifinfo) | |
456 | goto out; | |
457 | ||
7a659d56 | 458 | if (if_outgoing && !kref_get_unless_zero(&if_outgoing->refcount)) { |
89652331 SW |
459 | kfree(neigh_ifinfo); |
460 | neigh_ifinfo = NULL; | |
461 | goto out; | |
462 | } | |
463 | ||
464 | INIT_HLIST_NODE(&neigh_ifinfo->list); | |
962c6832 SE |
465 | kref_init(&neigh_ifinfo->refcount); |
466 | kref_get(&neigh_ifinfo->refcount); | |
89652331 SW |
467 | neigh_ifinfo->if_outgoing = if_outgoing; |
468 | ||
469 | hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); | |
470 | ||
471 | out: | |
472 | spin_unlock_bh(&neigh->ifinfo_lock); | |
473 | ||
474 | return neigh_ifinfo; | |
475 | } | |
476 | ||
ed292663 ML |
477 | /** |
478 | * batadv_neigh_node_get - retrieve a neighbour from the list | |
479 | * @orig_node: originator which the neighbour belongs to | |
480 | * @hard_iface: the interface where this neighbour is connected to | |
481 | * @addr: the address of the neighbour | |
482 | * | |
483 | * Looks for and possibly returns a neighbour belonging to this originator list | |
484 | * which is connected through the provided hard interface. | |
62fe710f SE |
485 | * |
486 | * Return: neighbor when found. Othwerwise NULL | |
ed292663 ML |
487 | */ |
488 | static struct batadv_neigh_node * | |
489 | batadv_neigh_node_get(const struct batadv_orig_node *orig_node, | |
490 | const struct batadv_hard_iface *hard_iface, | |
491 | const u8 *addr) | |
492 | { | |
493 | struct batadv_neigh_node *tmp_neigh_node, *res = NULL; | |
494 | ||
495 | rcu_read_lock(); | |
496 | hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { | |
497 | if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) | |
498 | continue; | |
499 | ||
500 | if (tmp_neigh_node->if_incoming != hard_iface) | |
501 | continue; | |
502 | ||
77ae32e8 | 503 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
ed292663 ML |
504 | continue; |
505 | ||
506 | res = tmp_neigh_node; | |
507 | break; | |
508 | } | |
509 | rcu_read_unlock(); | |
510 | ||
511 | return res; | |
512 | } | |
513 | ||
cef63419 ML |
514 | /** |
515 | * batadv_hardif_neigh_create - create a hardif neighbour node | |
516 | * @hard_iface: the interface this neighbour is connected to | |
517 | * @neigh_addr: the interface address of the neighbour to retrieve | |
518 | * | |
62fe710f | 519 | * Return: the hardif neighbour node if found or created or NULL otherwise. |
cef63419 ML |
520 | */ |
521 | static struct batadv_hardif_neigh_node * | |
522 | batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface, | |
523 | const u8 *neigh_addr) | |
524 | { | |
8248a4c7 | 525 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
cef63419 ML |
526 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
527 | ||
528 | spin_lock_bh(&hard_iface->neigh_list_lock); | |
529 | ||
530 | /* check if neighbor hasn't been added in the meantime */ | |
531 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
532 | if (hardif_neigh) | |
533 | goto out; | |
534 | ||
7a659d56 | 535 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
cef63419 ML |
536 | goto out; |
537 | ||
538 | hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC); | |
539 | if (!hardif_neigh) { | |
82047ad7 | 540 | batadv_hardif_put(hard_iface); |
cef63419 ML |
541 | goto out; |
542 | } | |
543 | ||
544 | INIT_HLIST_NODE(&hardif_neigh->list); | |
545 | ether_addr_copy(hardif_neigh->addr, neigh_addr); | |
546 | hardif_neigh->if_incoming = hard_iface; | |
547 | hardif_neigh->last_seen = jiffies; | |
548 | ||
90f564df | 549 | kref_init(&hardif_neigh->refcount); |
cef63419 | 550 | |
8248a4c7 ML |
551 | if (bat_priv->bat_algo_ops->bat_hardif_neigh_init) |
552 | bat_priv->bat_algo_ops->bat_hardif_neigh_init(hardif_neigh); | |
553 | ||
cef63419 ML |
554 | hlist_add_head(&hardif_neigh->list, &hard_iface->neigh_list); |
555 | ||
556 | out: | |
557 | spin_unlock_bh(&hard_iface->neigh_list_lock); | |
558 | return hardif_neigh; | |
559 | } | |
560 | ||
561 | /** | |
562 | * batadv_hardif_neigh_get_or_create - retrieve or create a hardif neighbour | |
563 | * node | |
564 | * @hard_iface: the interface this neighbour is connected to | |
565 | * @neigh_addr: the interface address of the neighbour to retrieve | |
566 | * | |
62fe710f | 567 | * Return: the hardif neighbour node if found or created or NULL otherwise. |
cef63419 ML |
568 | */ |
569 | static struct batadv_hardif_neigh_node * | |
570 | batadv_hardif_neigh_get_or_create(struct batadv_hard_iface *hard_iface, | |
571 | const u8 *neigh_addr) | |
572 | { | |
573 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; | |
574 | ||
575 | /* first check without locking to avoid the overhead */ | |
576 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
577 | if (hardif_neigh) | |
578 | return hardif_neigh; | |
579 | ||
580 | return batadv_hardif_neigh_create(hard_iface, neigh_addr); | |
581 | } | |
582 | ||
583 | /** | |
584 | * batadv_hardif_neigh_get - retrieve a hardif neighbour from the list | |
585 | * @hard_iface: the interface where this neighbour is connected to | |
586 | * @neigh_addr: the address of the neighbour | |
587 | * | |
588 | * Looks for and possibly returns a neighbour belonging to this hard interface. | |
62fe710f SE |
589 | * |
590 | * Return: neighbor when found. Othwerwise NULL | |
cef63419 ML |
591 | */ |
592 | struct batadv_hardif_neigh_node * | |
593 | batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface, | |
594 | const u8 *neigh_addr) | |
595 | { | |
596 | struct batadv_hardif_neigh_node *tmp_hardif_neigh, *hardif_neigh = NULL; | |
597 | ||
598 | rcu_read_lock(); | |
599 | hlist_for_each_entry_rcu(tmp_hardif_neigh, | |
600 | &hard_iface->neigh_list, list) { | |
601 | if (!batadv_compare_eth(tmp_hardif_neigh->addr, neigh_addr)) | |
602 | continue; | |
603 | ||
90f564df | 604 | if (!kref_get_unless_zero(&tmp_hardif_neigh->refcount)) |
cef63419 ML |
605 | continue; |
606 | ||
607 | hardif_neigh = tmp_hardif_neigh; | |
608 | break; | |
609 | } | |
610 | rcu_read_unlock(); | |
611 | ||
612 | return hardif_neigh; | |
613 | } | |
614 | ||
0538f759 AQ |
615 | /** |
616 | * batadv_neigh_node_new - create and init a new neigh_node object | |
3f32f8a6 | 617 | * @orig_node: originator object representing the neighbour |
0538f759 AQ |
618 | * @hard_iface: the interface where the neighbour is connected to |
619 | * @neigh_addr: the mac address of the neighbour interface | |
0538f759 AQ |
620 | * |
621 | * Allocates a new neigh_node object and initialises all the generic fields. | |
62fe710f SE |
622 | * |
623 | * Return: neighbor when found. Othwerwise NULL | |
0538f759 | 624 | */ |
56303d34 | 625 | struct batadv_neigh_node * |
3f32f8a6 ML |
626 | batadv_neigh_node_new(struct batadv_orig_node *orig_node, |
627 | struct batadv_hard_iface *hard_iface, | |
628 | const u8 *neigh_addr) | |
c6c8fea2 | 629 | { |
56303d34 | 630 | struct batadv_neigh_node *neigh_node; |
cef63419 | 631 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
c6c8fea2 | 632 | |
741aa06b ML |
633 | neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr); |
634 | if (neigh_node) | |
635 | goto out; | |
636 | ||
cef63419 ML |
637 | hardif_neigh = batadv_hardif_neigh_get_or_create(hard_iface, |
638 | neigh_addr); | |
639 | if (!hardif_neigh) | |
640 | goto out; | |
641 | ||
704509b8 | 642 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 643 | if (!neigh_node) |
7ae8b285 | 644 | goto out; |
c6c8fea2 | 645 | |
7a659d56 | 646 | if (!kref_get_unless_zero(&hard_iface->refcount)) { |
f729dc70 ML |
647 | kfree(neigh_node); |
648 | neigh_node = NULL; | |
649 | goto out; | |
650 | } | |
651 | ||
9591a79f | 652 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
653 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
654 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 655 | |
8fdd0153 | 656 | ether_addr_copy(neigh_node->addr, neigh_addr); |
0538f759 AQ |
657 | neigh_node->if_incoming = hard_iface; |
658 | neigh_node->orig_node = orig_node; | |
e48474ed | 659 | neigh_node->last_seen = jiffies; |
0538f759 | 660 | |
abe59c65 SE |
661 | /* increment unique neighbor refcount */ |
662 | kref_get(&hardif_neigh->refcount); | |
663 | neigh_node->hardif_neigh = hardif_neigh; | |
664 | ||
1605d0d6 | 665 | /* extra reference for return */ |
77ae32e8 SE |
666 | kref_init(&neigh_node->refcount); |
667 | kref_get(&neigh_node->refcount); | |
c6c8fea2 | 668 | |
741aa06b ML |
669 | spin_lock_bh(&orig_node->neigh_list_lock); |
670 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); | |
671 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
672 | ||
673 | batadv_dbg(BATADV_DBG_BATMAN, orig_node->bat_priv, | |
674 | "Creating new neighbor %pM for orig_node %pM on interface %s\n", | |
675 | neigh_addr, orig_node->orig, hard_iface->net_dev->name); | |
676 | ||
7ae8b285 | 677 | out: |
cef63419 | 678 | if (hardif_neigh) |
accadc35 | 679 | batadv_hardif_neigh_put(hardif_neigh); |
c6c8fea2 SE |
680 | return neigh_node; |
681 | } | |
682 | ||
7587405a ML |
683 | /** |
684 | * batadv_hardif_neigh_seq_print_text - print the single hop neighbour list | |
685 | * @seq: neighbour table seq_file struct | |
686 | * @offset: not used | |
687 | * | |
62fe710f | 688 | * Return: always 0 |
7587405a ML |
689 | */ |
690 | int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset) | |
691 | { | |
692 | struct net_device *net_dev = (struct net_device *)seq->private; | |
693 | struct batadv_priv *bat_priv = netdev_priv(net_dev); | |
694 | struct batadv_hard_iface *primary_if; | |
695 | ||
696 | primary_if = batadv_seq_print_text_primary_if_get(seq); | |
697 | if (!primary_if) | |
698 | return 0; | |
699 | ||
700 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", | |
701 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, | |
702 | primary_if->net_dev->dev_addr, net_dev->name, | |
703 | bat_priv->bat_algo_ops->name); | |
704 | ||
82047ad7 | 705 | batadv_hardif_put(primary_if); |
7587405a ML |
706 | |
707 | if (!bat_priv->bat_algo_ops->bat_neigh_print) { | |
708 | seq_puts(seq, | |
709 | "No printing function for this routing protocol\n"); | |
710 | return 0; | |
711 | } | |
712 | ||
713 | bat_priv->bat_algo_ops->bat_neigh_print(bat_priv, seq); | |
714 | return 0; | |
715 | } | |
716 | ||
7351a482 | 717 | /** |
2baa753c SE |
718 | * batadv_orig_ifinfo_release - release orig_ifinfo from lists and queue for |
719 | * free after rcu grace period | |
a6ba0d34 | 720 | * @ref: kref pointer of the orig_ifinfo |
7351a482 | 721 | */ |
a6ba0d34 | 722 | static void batadv_orig_ifinfo_release(struct kref *ref) |
7351a482 | 723 | { |
a6ba0d34 | 724 | struct batadv_orig_ifinfo *orig_ifinfo; |
000c8dff | 725 | struct batadv_neigh_node *router; |
7351a482 | 726 | |
a6ba0d34 SE |
727 | orig_ifinfo = container_of(ref, struct batadv_orig_ifinfo, refcount); |
728 | ||
7351a482 | 729 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
82047ad7 | 730 | batadv_hardif_put(orig_ifinfo->if_outgoing); |
7351a482 | 731 | |
000c8dff SW |
732 | /* this is the last reference to this object */ |
733 | router = rcu_dereference_protected(orig_ifinfo->router, true); | |
734 | if (router) | |
25bb2509 | 735 | batadv_neigh_node_put(router); |
2baa753c SE |
736 | |
737 | kfree_rcu(orig_ifinfo, rcu); | |
7351a482 SW |
738 | } |
739 | ||
740 | /** | |
35f94779 | 741 | * batadv_orig_ifinfo_put - decrement the refcounter and possibly release |
deed9660 | 742 | * the orig_ifinfo |
7351a482 SW |
743 | * @orig_ifinfo: the orig_ifinfo object to release |
744 | */ | |
35f94779 | 745 | void batadv_orig_ifinfo_put(struct batadv_orig_ifinfo *orig_ifinfo) |
7351a482 | 746 | { |
a6ba0d34 | 747 | kref_put(&orig_ifinfo->refcount, batadv_orig_ifinfo_release); |
7351a482 SW |
748 | } |
749 | ||
750 | /** | |
deed9660 SE |
751 | * batadv_orig_node_free_rcu - free the orig_node |
752 | * @rcu: rcu pointer of the orig_node | |
7351a482 | 753 | */ |
deed9660 | 754 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
7351a482 | 755 | { |
deed9660 SE |
756 | struct batadv_orig_node *orig_node; |
757 | ||
758 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); | |
759 | ||
760 | batadv_mcast_purge_orig(orig_node); | |
761 | ||
762 | batadv_frag_purge_orig(orig_node, NULL); | |
763 | ||
764 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) | |
765 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
766 | ||
767 | kfree(orig_node->tt_buff); | |
768 | kfree(orig_node); | |
7351a482 SW |
769 | } |
770 | ||
deed9660 SE |
771 | /** |
772 | * batadv_orig_node_release - release orig_node from lists and queue for | |
773 | * free after rcu grace period | |
7c124391 | 774 | * @ref: kref pointer of the orig_node |
deed9660 | 775 | */ |
7c124391 | 776 | static void batadv_orig_node_release(struct kref *ref) |
c6c8fea2 | 777 | { |
b67bfe0d | 778 | struct hlist_node *node_tmp; |
f6c8b711 | 779 | struct batadv_neigh_node *neigh_node; |
7c124391 | 780 | struct batadv_orig_node *orig_node; |
7351a482 | 781 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 782 | |
7c124391 SE |
783 | orig_node = container_of(ref, struct batadv_orig_node, refcount); |
784 | ||
f987ed6e ML |
785 | spin_lock_bh(&orig_node->neigh_list_lock); |
786 | ||
c6c8fea2 | 787 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 788 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 789 | &orig_node->neigh_list, list) { |
f987ed6e | 790 | hlist_del_rcu(&neigh_node->list); |
25bb2509 | 791 | batadv_neigh_node_put(neigh_node); |
c6c8fea2 SE |
792 | } |
793 | ||
7351a482 SW |
794 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
795 | &orig_node->ifinfo_list, list) { | |
796 | hlist_del_rcu(&orig_ifinfo->list); | |
35f94779 | 797 | batadv_orig_ifinfo_put(orig_ifinfo); |
7351a482 | 798 | } |
f987ed6e ML |
799 | spin_unlock_bh(&orig_node->neigh_list_lock); |
800 | ||
d56b1705 MH |
801 | /* Free nc_nodes */ |
802 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
803 | ||
deed9660 | 804 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
c6c8fea2 SE |
805 | } |
806 | ||
72822225 | 807 | /** |
5d967310 | 808 | * batadv_orig_node_put - decrement the orig node refcounter and possibly |
deed9660 | 809 | * release it |
72822225 LL |
810 | * @orig_node: the orig node to free |
811 | */ | |
5d967310 | 812 | void batadv_orig_node_put(struct batadv_orig_node *orig_node) |
7b36e8ee | 813 | { |
7c124391 | 814 | kref_put(&orig_node->refcount, batadv_orig_node_release); |
7b36e8ee ML |
815 | } |
816 | ||
56303d34 | 817 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 818 | { |
5bf74e9c | 819 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 820 | struct hlist_node *node_tmp; |
16b1aba8 | 821 | struct hlist_head *head; |
16b1aba8 | 822 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 823 | struct batadv_orig_node *orig_node; |
6b5e971a | 824 | u32 i; |
16b1aba8 ML |
825 | |
826 | if (!hash) | |
c6c8fea2 SE |
827 | return; |
828 | ||
829 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
830 | ||
c6c8fea2 | 831 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
832 | |
833 | for (i = 0; i < hash->size; i++) { | |
834 | head = &hash->table[i]; | |
835 | list_lock = &hash->list_locks[i]; | |
836 | ||
837 | spin_lock_bh(list_lock); | |
b67bfe0d | 838 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 839 | head, hash_entry) { |
b67bfe0d | 840 | hlist_del_rcu(&orig_node->hash_entry); |
5d967310 | 841 | batadv_orig_node_put(orig_node); |
16b1aba8 ML |
842 | } |
843 | spin_unlock_bh(list_lock); | |
844 | } | |
845 | ||
1a8eaf07 | 846 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
847 | } |
848 | ||
bbad0a5e AQ |
849 | /** |
850 | * batadv_orig_node_new - creates a new orig_node | |
851 | * @bat_priv: the bat priv with all the soft interface information | |
852 | * @addr: the mac address of the originator | |
853 | * | |
854 | * Creates a new originator object and initialise all the generic fields. | |
855 | * The new object is not added to the originator list. | |
62fe710f SE |
856 | * |
857 | * Return: the newly created object or NULL on failure. | |
9cfc7bd6 | 858 | */ |
bbad0a5e | 859 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
6b5e971a | 860 | const u8 *addr) |
c6c8fea2 | 861 | { |
56303d34 | 862 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 863 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 864 | unsigned long reset_time; |
bbad0a5e | 865 | int i; |
c6c8fea2 | 866 | |
39c75a51 SE |
867 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
868 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 869 | |
704509b8 | 870 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
871 | if (!orig_node) |
872 | return NULL; | |
873 | ||
9591a79f | 874 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
d0fa4f3f | 875 | INIT_HLIST_HEAD(&orig_node->vlan_list); |
7351a482 | 876 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 877 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 878 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 879 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 880 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 881 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 882 | |
d56b1705 MH |
883 | batadv_nc_init_orig(orig_node); |
884 | ||
7b36e8ee | 885 | /* extra reference for return */ |
7c124391 SE |
886 | kref_init(&orig_node->refcount); |
887 | kref_get(&orig_node->refcount); | |
c6c8fea2 | 888 | |
16b1aba8 | 889 | orig_node->bat_priv = bat_priv; |
8fdd0153 | 890 | ether_addr_copy(orig_node->orig, addr); |
785ea114 | 891 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 892 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 893 | orig_node->tt_buff = NULL; |
a73105b8 | 894 | orig_node->tt_buff_len = 0; |
2c667a33 | 895 | orig_node->last_seen = jiffies; |
42d0b044 SE |
896 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
897 | orig_node->bcast_seqno_reset = reset_time; | |
8a4023c5 | 898 | |
60432d75 LL |
899 | #ifdef CONFIG_BATMAN_ADV_MCAST |
900 | orig_node->mcast_flags = BATADV_NO_FLAGS; | |
8a4023c5 LL |
901 | INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node); |
902 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node); | |
903 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node); | |
904 | spin_lock_init(&orig_node->mcast_handler_lock); | |
60432d75 | 905 | #endif |
c6c8fea2 | 906 | |
7ea7b4a1 AQ |
907 | /* create a vlan object for the "untagged" LAN */ |
908 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
909 | if (!vlan) | |
910 | goto free_orig_node; | |
911 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
912 | * Immediately release vlan since it is not needed anymore in this | |
913 | * context | |
914 | */ | |
21754e25 | 915 | batadv_orig_node_vlan_put(vlan); |
7ea7b4a1 | 916 | |
610bfc6b MH |
917 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
918 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
919 | spin_lock_init(&orig_node->fragments[i].lock); | |
920 | orig_node->fragments[i].size = 0; | |
921 | } | |
922 | ||
c6c8fea2 | 923 | return orig_node; |
c6c8fea2 SE |
924 | free_orig_node: |
925 | kfree(orig_node); | |
926 | return NULL; | |
927 | } | |
928 | ||
709de13f SW |
929 | /** |
930 | * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor | |
931 | * @bat_priv: the bat priv with all the soft interface information | |
932 | * @neigh: orig node which is to be checked | |
933 | */ | |
934 | static void | |
935 | batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, | |
936 | struct batadv_neigh_node *neigh) | |
937 | { | |
938 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
939 | struct batadv_hard_iface *if_outgoing; | |
940 | struct hlist_node *node_tmp; | |
941 | ||
942 | spin_lock_bh(&neigh->ifinfo_lock); | |
943 | ||
944 | /* for all ifinfo objects for this neighinator */ | |
945 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
946 | &neigh->ifinfo_list, list) { | |
947 | if_outgoing = neigh_ifinfo->if_outgoing; | |
948 | ||
949 | /* always keep the default interface */ | |
950 | if (if_outgoing == BATADV_IF_DEFAULT) | |
951 | continue; | |
952 | ||
953 | /* don't purge if the interface is not (going) down */ | |
954 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
955 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
956 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
957 | continue; | |
958 | ||
959 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
960 | "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", | |
961 | neigh->addr, if_outgoing->net_dev->name); | |
962 | ||
963 | hlist_del_rcu(&neigh_ifinfo->list); | |
044fa3ae | 964 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
709de13f SW |
965 | } |
966 | ||
967 | spin_unlock_bh(&neigh->ifinfo_lock); | |
968 | } | |
969 | ||
7351a482 SW |
970 | /** |
971 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
972 | * @bat_priv: the bat priv with all the soft interface information | |
973 | * @orig_node: orig node which is to be checked | |
974 | * | |
62fe710f | 975 | * Return: true if any ifinfo entry was purged, false otherwise. |
7351a482 SW |
976 | */ |
977 | static bool | |
978 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
979 | struct batadv_orig_node *orig_node) | |
980 | { | |
981 | struct batadv_orig_ifinfo *orig_ifinfo; | |
982 | struct batadv_hard_iface *if_outgoing; | |
983 | struct hlist_node *node_tmp; | |
984 | bool ifinfo_purged = false; | |
985 | ||
986 | spin_lock_bh(&orig_node->neigh_list_lock); | |
987 | ||
988 | /* for all ifinfo objects for this originator */ | |
989 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
990 | &orig_node->ifinfo_list, list) { | |
991 | if_outgoing = orig_ifinfo->if_outgoing; | |
992 | ||
993 | /* always keep the default interface */ | |
994 | if (if_outgoing == BATADV_IF_DEFAULT) | |
995 | continue; | |
996 | ||
997 | /* don't purge if the interface is not (going) down */ | |
998 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
999 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
1000 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
1001 | continue; | |
1002 | ||
1003 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1004 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
1005 | orig_node->orig, if_outgoing->net_dev->name); | |
1006 | ||
1007 | ifinfo_purged = true; | |
1008 | ||
1009 | hlist_del_rcu(&orig_ifinfo->list); | |
35f94779 | 1010 | batadv_orig_ifinfo_put(orig_ifinfo); |
f3b3d901 SW |
1011 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
1012 | orig_node->last_bonding_candidate = NULL; | |
35f94779 | 1013 | batadv_orig_ifinfo_put(orig_ifinfo); |
f3b3d901 | 1014 | } |
7351a482 SW |
1015 | } |
1016 | ||
1017 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
1018 | ||
1019 | return ifinfo_purged; | |
1020 | } | |
1021 | ||
89652331 SW |
1022 | /** |
1023 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
1024 | * @bat_priv: the bat priv with all the soft interface information | |
1025 | * @orig_node: orig node which is to be checked | |
1026 | * | |
62fe710f | 1027 | * Return: true if any neighbor was purged, false otherwise |
89652331 | 1028 | */ |
56303d34 SE |
1029 | static bool |
1030 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 1031 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 1032 | { |
b67bfe0d | 1033 | struct hlist_node *node_tmp; |
56303d34 | 1034 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 1035 | bool neigh_purged = false; |
0b0094e0 | 1036 | unsigned long last_seen; |
56303d34 | 1037 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 1038 | |
f987ed6e ML |
1039 | spin_lock_bh(&orig_node->neigh_list_lock); |
1040 | ||
c6c8fea2 | 1041 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 1042 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 1043 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1044 | last_seen = neigh_node->last_seen; |
1045 | if_incoming = neigh_node->if_incoming; | |
1046 | ||
42d0b044 | 1047 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
1048 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
1049 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1050 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
1051 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
1052 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1053 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 1054 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1055 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
1056 | orig_node->orig, neigh_node->addr, | |
1057 | if_incoming->net_dev->name); | |
c6c8fea2 | 1058 | else |
39c75a51 | 1059 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1060 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
1061 | orig_node->orig, neigh_node->addr, | |
1062 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
1063 | |
1064 | neigh_purged = true; | |
9591a79f | 1065 | |
f987ed6e | 1066 | hlist_del_rcu(&neigh_node->list); |
25bb2509 | 1067 | batadv_neigh_node_put(neigh_node); |
709de13f SW |
1068 | } else { |
1069 | /* only necessary if not the whole neighbor is to be | |
1070 | * deleted, but some interface has been removed. | |
1071 | */ | |
1072 | batadv_purge_neigh_ifinfo(bat_priv, neigh_node); | |
c6c8fea2 SE |
1073 | } |
1074 | } | |
f987ed6e ML |
1075 | |
1076 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
1077 | return neigh_purged; |
1078 | } | |
1079 | ||
89652331 SW |
1080 | /** |
1081 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
1082 | * @bat_priv: the bat priv with all the soft interface information | |
1083 | * @orig_node: orig node which is to be checked | |
1084 | * @if_outgoing: the interface for which the metric should be compared | |
1085 | * | |
62fe710f | 1086 | * Return: the current best neighbor, with refcount increased. |
89652331 SW |
1087 | */ |
1088 | static struct batadv_neigh_node * | |
1089 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
1090 | struct batadv_orig_node *orig_node, | |
1091 | struct batadv_hard_iface *if_outgoing) | |
1092 | { | |
1093 | struct batadv_neigh_node *best = NULL, *neigh; | |
1094 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
1095 | ||
1096 | rcu_read_lock(); | |
1097 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
1098 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
1099 | best, if_outgoing) <= 0)) | |
1100 | continue; | |
1101 | ||
77ae32e8 | 1102 | if (!kref_get_unless_zero(&neigh->refcount)) |
89652331 SW |
1103 | continue; |
1104 | ||
1105 | if (best) | |
25bb2509 | 1106 | batadv_neigh_node_put(best); |
89652331 SW |
1107 | |
1108 | best = neigh; | |
1109 | } | |
1110 | rcu_read_unlock(); | |
1111 | ||
1112 | return best; | |
1113 | } | |
1114 | ||
7351a482 SW |
1115 | /** |
1116 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
1117 | * @bat_priv: the bat priv with all the soft interface information | |
1118 | * @orig_node: orig node which is to be checked | |
1119 | * | |
1120 | * This function checks if the orig_node or substructures of it have become | |
1121 | * obsolete, and purges this information if that's the case. | |
1122 | * | |
62fe710f | 1123 | * Return: true if the orig_node is to be removed, false otherwise. |
7351a482 | 1124 | */ |
56303d34 SE |
1125 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
1126 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 1127 | { |
56303d34 | 1128 | struct batadv_neigh_node *best_neigh_node; |
7351a482 | 1129 | struct batadv_hard_iface *hard_iface; |
7b955a9f | 1130 | bool changed_ifinfo, changed_neigh; |
c6c8fea2 | 1131 | |
42d0b044 SE |
1132 | if (batadv_has_timed_out(orig_node->last_seen, |
1133 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 1134 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1135 | "Originator timeout: originator %pM, last_seen %u\n", |
1136 | orig_node->orig, | |
1137 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 1138 | return true; |
c6c8fea2 | 1139 | } |
7b955a9f SW |
1140 | changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
1141 | changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); | |
7351a482 | 1142 | |
7b955a9f | 1143 | if (!changed_ifinfo && !changed_neigh) |
89652331 SW |
1144 | return false; |
1145 | ||
7351a482 | 1146 | /* first for NULL ... */ |
89652331 SW |
1147 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
1148 | BATADV_IF_DEFAULT); | |
7351a482 SW |
1149 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
1150 | best_neigh_node); | |
89652331 | 1151 | if (best_neigh_node) |
25bb2509 | 1152 | batadv_neigh_node_put(best_neigh_node); |
c6c8fea2 | 1153 | |
7351a482 SW |
1154 | /* ... then for all other interfaces. */ |
1155 | rcu_read_lock(); | |
1156 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1157 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1158 | continue; | |
1159 | ||
1160 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1161 | continue; | |
1162 | ||
1163 | best_neigh_node = batadv_find_best_neighbor(bat_priv, | |
1164 | orig_node, | |
1165 | hard_iface); | |
1166 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
1167 | best_neigh_node); | |
1168 | if (best_neigh_node) | |
25bb2509 | 1169 | batadv_neigh_node_put(best_neigh_node); |
7351a482 SW |
1170 | } |
1171 | rcu_read_unlock(); | |
1172 | ||
c6c8fea2 SE |
1173 | return false; |
1174 | } | |
1175 | ||
56303d34 | 1176 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 1177 | { |
5bf74e9c | 1178 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 1179 | struct hlist_node *node_tmp; |
c6c8fea2 | 1180 | struct hlist_head *head; |
fb778ea1 | 1181 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 1182 | struct batadv_orig_node *orig_node; |
6b5e971a | 1183 | u32 i; |
c6c8fea2 SE |
1184 | |
1185 | if (!hash) | |
1186 | return; | |
1187 | ||
c6c8fea2 SE |
1188 | /* for all origins... */ |
1189 | for (i = 0; i < hash->size; i++) { | |
1190 | head = &hash->table[i]; | |
fb778ea1 | 1191 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1192 | |
fb778ea1 | 1193 | spin_lock_bh(list_lock); |
b67bfe0d | 1194 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 1195 | head, hash_entry) { |
03fc7f86 | 1196 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 1197 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 1198 | hlist_del_rcu(&orig_node->hash_entry); |
9d31b3ce LL |
1199 | batadv_tt_global_del_orig(orig_node->bat_priv, |
1200 | orig_node, -1, | |
1201 | "originator timed out"); | |
5d967310 | 1202 | batadv_orig_node_put(orig_node); |
fb778ea1 | 1203 | continue; |
c6c8fea2 | 1204 | } |
610bfc6b MH |
1205 | |
1206 | batadv_frag_purge_orig(orig_node, | |
1207 | batadv_frag_check_entry); | |
c6c8fea2 | 1208 | } |
fb778ea1 | 1209 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
1210 | } |
1211 | ||
7cf06bc6 | 1212 | batadv_gw_election(bat_priv); |
c6c8fea2 SE |
1213 | } |
1214 | ||
03fc7f86 | 1215 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 1216 | { |
56303d34 SE |
1217 | struct delayed_work *delayed_work; |
1218 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1219 | |
56303d34 SE |
1220 | delayed_work = container_of(work, struct delayed_work, work); |
1221 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 1222 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
1223 | queue_delayed_work(batadv_event_workqueue, |
1224 | &bat_priv->orig_work, | |
1225 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
1226 | } |
1227 | ||
56303d34 | 1228 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 1229 | { |
03fc7f86 | 1230 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
1231 | } |
1232 | ||
7d211efc | 1233 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1234 | { |
1235 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1236 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 1237 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 1238 | |
30da63a6 ML |
1239 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1240 | if (!primary_if) | |
737a2a22 | 1241 | return 0; |
c6c8fea2 | 1242 | |
737a2a22 | 1243 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 1244 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
1245 | primary_if->net_dev->dev_addr, net_dev->name, |
1246 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 1247 | |
82047ad7 | 1248 | batadv_hardif_put(primary_if); |
c6c8fea2 | 1249 | |
737a2a22 AQ |
1250 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
1251 | seq_puts(seq, | |
1252 | "No printing function for this routing protocol\n"); | |
1253 | return 0; | |
c6c8fea2 SE |
1254 | } |
1255 | ||
cb1c92ec SW |
1256 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, |
1257 | BATADV_IF_DEFAULT); | |
c6c8fea2 | 1258 | |
30da63a6 | 1259 | return 0; |
c6c8fea2 SE |
1260 | } |
1261 | ||
cb1c92ec SW |
1262 | /** |
1263 | * batadv_orig_hardif_seq_print_text - writes originator infos for a specific | |
1264 | * outgoing interface | |
1265 | * @seq: debugfs table seq_file struct | |
1266 | * @offset: not used | |
1267 | * | |
62fe710f | 1268 | * Return: 0 |
cb1c92ec SW |
1269 | */ |
1270 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) | |
1271 | { | |
1272 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1273 | struct batadv_hard_iface *hard_iface; | |
1274 | struct batadv_priv *bat_priv; | |
1275 | ||
1276 | hard_iface = batadv_hardif_get_by_netdev(net_dev); | |
1277 | ||
1278 | if (!hard_iface || !hard_iface->soft_iface) { | |
1279 | seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); | |
1280 | goto out; | |
1281 | } | |
1282 | ||
1283 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
1284 | if (!bat_priv->bat_algo_ops->bat_orig_print) { | |
1285 | seq_puts(seq, | |
1286 | "No printing function for this routing protocol\n"); | |
1287 | goto out; | |
1288 | } | |
1289 | ||
1290 | if (hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1291 | seq_puts(seq, "Interface not active\n"); | |
1292 | goto out; | |
1293 | } | |
1294 | ||
1295 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", | |
1296 | BATADV_SOURCE_VERSION, hard_iface->net_dev->name, | |
1297 | hard_iface->net_dev->dev_addr, | |
1298 | hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); | |
1299 | ||
1300 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); | |
1301 | ||
1302 | out: | |
16a41423 | 1303 | if (hard_iface) |
82047ad7 | 1304 | batadv_hardif_put(hard_iface); |
cb1c92ec SW |
1305 | return 0; |
1306 | } | |
1307 | ||
56303d34 SE |
1308 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
1309 | int max_if_num) | |
c6c8fea2 | 1310 | { |
56303d34 | 1311 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 1312 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 1313 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1314 | struct hlist_head *head; |
56303d34 | 1315 | struct batadv_orig_node *orig_node; |
6b5e971a | 1316 | u32 i; |
c90681b8 | 1317 | int ret; |
c6c8fea2 SE |
1318 | |
1319 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1320 | * if_num |
1321 | */ | |
c6c8fea2 SE |
1322 | for (i = 0; i < hash->size; i++) { |
1323 | head = &hash->table[i]; | |
1324 | ||
fb778ea1 | 1325 | rcu_read_lock(); |
b67bfe0d | 1326 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1327 | ret = 0; |
1328 | if (bao->bat_orig_add_if) | |
1329 | ret = bao->bat_orig_add_if(orig_node, | |
1330 | max_if_num); | |
5346c35e | 1331 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1332 | goto err; |
1333 | } | |
fb778ea1 | 1334 | rcu_read_unlock(); |
c6c8fea2 SE |
1335 | } |
1336 | ||
c6c8fea2 SE |
1337 | return 0; |
1338 | ||
1339 | err: | |
fb778ea1 | 1340 | rcu_read_unlock(); |
c6c8fea2 SE |
1341 | return -ENOMEM; |
1342 | } | |
1343 | ||
56303d34 SE |
1344 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
1345 | int max_if_num) | |
c6c8fea2 | 1346 | { |
56303d34 | 1347 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 1348 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1349 | struct hlist_head *head; |
56303d34 SE |
1350 | struct batadv_hard_iface *hard_iface_tmp; |
1351 | struct batadv_orig_node *orig_node; | |
d0015fdd | 1352 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
6b5e971a | 1353 | u32 i; |
c90681b8 | 1354 | int ret; |
c6c8fea2 SE |
1355 | |
1356 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1357 | * if_num |
1358 | */ | |
c6c8fea2 SE |
1359 | for (i = 0; i < hash->size; i++) { |
1360 | head = &hash->table[i]; | |
1361 | ||
fb778ea1 | 1362 | rcu_read_lock(); |
b67bfe0d | 1363 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1364 | ret = 0; |
1365 | if (bao->bat_orig_del_if) | |
1366 | ret = bao->bat_orig_del_if(orig_node, | |
1367 | max_if_num, | |
1368 | hard_iface->if_num); | |
5346c35e | 1369 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1370 | goto err; |
1371 | } | |
fb778ea1 | 1372 | rcu_read_unlock(); |
c6c8fea2 SE |
1373 | } |
1374 | ||
1375 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1376 | rcu_read_lock(); | |
3193e8fd | 1377 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1378 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1379 | continue; |
1380 | ||
e6c10f43 | 1381 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1382 | continue; |
1383 | ||
e6c10f43 | 1384 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1385 | continue; |
1386 | ||
e6c10f43 ML |
1387 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1388 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1389 | } |
1390 | rcu_read_unlock(); | |
1391 | ||
e6c10f43 | 1392 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1393 | return 0; |
1394 | ||
1395 | err: | |
fb778ea1 | 1396 | rcu_read_unlock(); |
c6c8fea2 SE |
1397 | return -ENOMEM; |
1398 | } |