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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 | /** | |
154 | * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly | |
155 | * release the originator-vlan object | |
7ea7b4a1 AQ |
156 | * @orig_vlan: the originator-vlan object to release |
157 | */ | |
158 | void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan) | |
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 SE |
198 | if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
199 | batadv_hardif_free_ref(neigh_ifinfo->if_outgoing); | |
200 | ||
201 | kfree_rcu(neigh_ifinfo, rcu); | |
89652331 SW |
202 | } |
203 | ||
204 | /** | |
ae3e1e36 | 205 | * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly release |
89652331 SW |
206 | * the neigh_ifinfo |
207 | * @neigh_ifinfo: the neigh_ifinfo object to release | |
208 | */ | |
209 | void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo) | |
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 | |
f6389692 SE |
230 | batadv_hardif_free_ref(hardif_neigh->if_incoming); |
231 | kfree_rcu(hardif_neigh, rcu); | |
cef63419 ML |
232 | } |
233 | ||
234 | /** | |
235 | * batadv_hardif_neigh_free_ref - decrement the hardif neighbors refcounter | |
f6389692 | 236 | * and possibly release it |
cef63419 ML |
237 | * @hardif_neigh: hardif neigh neighbor to free |
238 | */ | |
239 | void batadv_hardif_neigh_free_ref(struct batadv_hardif_neigh_node *hardif_neigh) | |
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; |
cef63419 | 253 | struct batadv_hardif_neigh_node *hardif_neigh; |
89652331 | 254 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
bcef1f3c | 255 | struct batadv_algo_ops *bao; |
89652331 | 256 | |
77ae32e8 | 257 | neigh_node = container_of(ref, struct batadv_neigh_node, refcount); |
bcef1f3c | 258 | bao = neigh_node->orig_node->bat_priv->bat_algo_ops; |
89652331 SW |
259 | |
260 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
261 | &neigh_node->ifinfo_list, list) { | |
ae3e1e36 | 262 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); |
89652331 | 263 | } |
bcef1f3c | 264 | |
cef63419 ML |
265 | hardif_neigh = batadv_hardif_neigh_get(neigh_node->if_incoming, |
266 | neigh_node->addr); | |
267 | if (hardif_neigh) { | |
268 | /* batadv_hardif_neigh_get() increases refcount too */ | |
f6389692 SE |
269 | batadv_hardif_neigh_free_ref(hardif_neigh); |
270 | batadv_hardif_neigh_free_ref(hardif_neigh); | |
cef63419 ML |
271 | } |
272 | ||
bcef1f3c AQ |
273 | if (bao->bat_neigh_free) |
274 | bao->bat_neigh_free(neigh_node); | |
275 | ||
b4d922cf | 276 | batadv_hardif_free_ref(neigh_node->if_incoming); |
89652331 | 277 | |
b4d922cf | 278 | kfree_rcu(neigh_node, rcu); |
89652331 SW |
279 | } |
280 | ||
89652331 | 281 | /** |
77ae32e8 SE |
282 | * batadv_neigh_node_free_ref - decrement the neighbors refcounter and possibly |
283 | * release it | |
89652331 SW |
284 | * @neigh_node: neigh neighbor to free |
285 | */ | |
56303d34 | 286 | void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) |
a4c135c5 | 287 | { |
77ae32e8 | 288 | kref_put(&neigh_node->refcount, batadv_neigh_node_release); |
a4c135c5 SW |
289 | } |
290 | ||
7351a482 SW |
291 | /** |
292 | * batadv_orig_node_get_router - router to the originator depending on iface | |
293 | * @orig_node: the orig node for the router | |
294 | * @if_outgoing: the interface where the payload packet has been received or | |
295 | * the OGM should be sent to | |
296 | * | |
62fe710f | 297 | * Return: the neighbor which should be router for this orig_node/iface. |
7351a482 SW |
298 | * |
299 | * The object is returned with refcounter increased by 1. | |
300 | */ | |
56303d34 | 301 | struct batadv_neigh_node * |
7351a482 SW |
302 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
303 | const struct batadv_hard_iface *if_outgoing) | |
e1a5382f | 304 | { |
7351a482 SW |
305 | struct batadv_orig_ifinfo *orig_ifinfo; |
306 | struct batadv_neigh_node *router = NULL; | |
e1a5382f LL |
307 | |
308 | rcu_read_lock(); | |
7351a482 SW |
309 | hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { |
310 | if (orig_ifinfo->if_outgoing != if_outgoing) | |
311 | continue; | |
312 | ||
313 | router = rcu_dereference(orig_ifinfo->router); | |
314 | break; | |
315 | } | |
e1a5382f | 316 | |
77ae32e8 | 317 | if (router && !kref_get_unless_zero(&router->refcount)) |
e1a5382f LL |
318 | router = NULL; |
319 | ||
320 | rcu_read_unlock(); | |
321 | return router; | |
322 | } | |
323 | ||
7351a482 SW |
324 | /** |
325 | * batadv_orig_ifinfo_get - find the ifinfo from an orig_node | |
326 | * @orig_node: the orig node to be queried | |
327 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
328 | * | |
62fe710f | 329 | * Return: the requested orig_ifinfo or NULL if not found. |
7351a482 SW |
330 | * |
331 | * The object is returned with refcounter increased by 1. | |
332 | */ | |
333 | struct batadv_orig_ifinfo * | |
334 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
335 | struct batadv_hard_iface *if_outgoing) | |
336 | { | |
337 | struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; | |
338 | ||
339 | rcu_read_lock(); | |
340 | hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, | |
341 | list) { | |
342 | if (tmp->if_outgoing != if_outgoing) | |
343 | continue; | |
344 | ||
a6ba0d34 | 345 | if (!kref_get_unless_zero(&tmp->refcount)) |
7351a482 SW |
346 | continue; |
347 | ||
348 | orig_ifinfo = tmp; | |
349 | break; | |
350 | } | |
351 | rcu_read_unlock(); | |
352 | ||
353 | return orig_ifinfo; | |
354 | } | |
355 | ||
356 | /** | |
357 | * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object | |
358 | * @orig_node: the orig node to be queried | |
359 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
360 | * | |
62fe710f | 361 | * Return: NULL in case of failure or the orig_ifinfo object for the if_outgoing |
7351a482 SW |
362 | * interface otherwise. The object is created and added to the list |
363 | * if it does not exist. | |
364 | * | |
365 | * The object is returned with refcounter increased by 1. | |
366 | */ | |
367 | struct batadv_orig_ifinfo * | |
368 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
369 | struct batadv_hard_iface *if_outgoing) | |
370 | { | |
371 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; | |
372 | unsigned long reset_time; | |
373 | ||
374 | spin_lock_bh(&orig_node->neigh_list_lock); | |
375 | ||
376 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
377 | if (orig_ifinfo) | |
378 | goto out; | |
379 | ||
380 | orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); | |
381 | if (!orig_ifinfo) | |
382 | goto out; | |
383 | ||
384 | if (if_outgoing != BATADV_IF_DEFAULT && | |
7a659d56 | 385 | !kref_get_unless_zero(&if_outgoing->refcount)) { |
7351a482 SW |
386 | kfree(orig_ifinfo); |
387 | orig_ifinfo = NULL; | |
388 | goto out; | |
389 | } | |
390 | ||
391 | reset_time = jiffies - 1; | |
392 | reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); | |
393 | orig_ifinfo->batman_seqno_reset = reset_time; | |
394 | orig_ifinfo->if_outgoing = if_outgoing; | |
395 | INIT_HLIST_NODE(&orig_ifinfo->list); | |
a6ba0d34 SE |
396 | kref_init(&orig_ifinfo->refcount); |
397 | kref_get(&orig_ifinfo->refcount); | |
7351a482 SW |
398 | hlist_add_head_rcu(&orig_ifinfo->list, |
399 | &orig_node->ifinfo_list); | |
400 | out: | |
401 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
402 | return orig_ifinfo; | |
403 | } | |
404 | ||
89652331 SW |
405 | /** |
406 | * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node | |
e51f0397 | 407 | * @neigh: the neigh node to be queried |
89652331 SW |
408 | * @if_outgoing: the interface for which the ifinfo should be acquired |
409 | * | |
410 | * The object is returned with refcounter increased by 1. | |
411 | * | |
62fe710f | 412 | * Return: the requested neigh_ifinfo or NULL if not found |
89652331 SW |
413 | */ |
414 | struct batadv_neigh_ifinfo * | |
415 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
416 | struct batadv_hard_iface *if_outgoing) | |
417 | { | |
418 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, | |
419 | *tmp_neigh_ifinfo; | |
420 | ||
421 | rcu_read_lock(); | |
422 | hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, | |
423 | list) { | |
424 | if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) | |
425 | continue; | |
426 | ||
962c6832 | 427 | if (!kref_get_unless_zero(&tmp_neigh_ifinfo->refcount)) |
89652331 SW |
428 | continue; |
429 | ||
430 | neigh_ifinfo = tmp_neigh_ifinfo; | |
431 | break; | |
432 | } | |
433 | rcu_read_unlock(); | |
434 | ||
435 | return neigh_ifinfo; | |
436 | } | |
437 | ||
438 | /** | |
439 | * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object | |
e51f0397 | 440 | * @neigh: the neigh node to be queried |
89652331 SW |
441 | * @if_outgoing: the interface for which the ifinfo should be acquired |
442 | * | |
62fe710f | 443 | * Return: NULL in case of failure or the neigh_ifinfo object for the |
89652331 SW |
444 | * if_outgoing interface otherwise. The object is created and added to the list |
445 | * if it does not exist. | |
446 | * | |
447 | * The object is returned with refcounter increased by 1. | |
448 | */ | |
449 | struct batadv_neigh_ifinfo * | |
450 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
451 | struct batadv_hard_iface *if_outgoing) | |
452 | { | |
453 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
454 | ||
455 | spin_lock_bh(&neigh->ifinfo_lock); | |
456 | ||
457 | neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); | |
458 | if (neigh_ifinfo) | |
459 | goto out; | |
460 | ||
461 | neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); | |
462 | if (!neigh_ifinfo) | |
463 | goto out; | |
464 | ||
7a659d56 | 465 | if (if_outgoing && !kref_get_unless_zero(&if_outgoing->refcount)) { |
89652331 SW |
466 | kfree(neigh_ifinfo); |
467 | neigh_ifinfo = NULL; | |
468 | goto out; | |
469 | } | |
470 | ||
471 | INIT_HLIST_NODE(&neigh_ifinfo->list); | |
962c6832 SE |
472 | kref_init(&neigh_ifinfo->refcount); |
473 | kref_get(&neigh_ifinfo->refcount); | |
89652331 SW |
474 | neigh_ifinfo->if_outgoing = if_outgoing; |
475 | ||
476 | hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); | |
477 | ||
478 | out: | |
479 | spin_unlock_bh(&neigh->ifinfo_lock); | |
480 | ||
481 | return neigh_ifinfo; | |
482 | } | |
483 | ||
ed292663 ML |
484 | /** |
485 | * batadv_neigh_node_get - retrieve a neighbour from the list | |
486 | * @orig_node: originator which the neighbour belongs to | |
487 | * @hard_iface: the interface where this neighbour is connected to | |
488 | * @addr: the address of the neighbour | |
489 | * | |
490 | * Looks for and possibly returns a neighbour belonging to this originator list | |
491 | * which is connected through the provided hard interface. | |
62fe710f SE |
492 | * |
493 | * Return: neighbor when found. Othwerwise NULL | |
ed292663 ML |
494 | */ |
495 | static struct batadv_neigh_node * | |
496 | batadv_neigh_node_get(const struct batadv_orig_node *orig_node, | |
497 | const struct batadv_hard_iface *hard_iface, | |
498 | const u8 *addr) | |
499 | { | |
500 | struct batadv_neigh_node *tmp_neigh_node, *res = NULL; | |
501 | ||
502 | rcu_read_lock(); | |
503 | hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { | |
504 | if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) | |
505 | continue; | |
506 | ||
507 | if (tmp_neigh_node->if_incoming != hard_iface) | |
508 | continue; | |
509 | ||
77ae32e8 | 510 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
ed292663 ML |
511 | continue; |
512 | ||
513 | res = tmp_neigh_node; | |
514 | break; | |
515 | } | |
516 | rcu_read_unlock(); | |
517 | ||
518 | return res; | |
519 | } | |
520 | ||
cef63419 ML |
521 | /** |
522 | * batadv_hardif_neigh_create - create a hardif neighbour node | |
523 | * @hard_iface: the interface this neighbour is connected to | |
524 | * @neigh_addr: the interface address of the neighbour to retrieve | |
525 | * | |
62fe710f | 526 | * Return: the hardif neighbour node if found or created or NULL otherwise. |
cef63419 ML |
527 | */ |
528 | static struct batadv_hardif_neigh_node * | |
529 | batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface, | |
530 | const u8 *neigh_addr) | |
531 | { | |
8248a4c7 | 532 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
cef63419 ML |
533 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
534 | ||
535 | spin_lock_bh(&hard_iface->neigh_list_lock); | |
536 | ||
537 | /* check if neighbor hasn't been added in the meantime */ | |
538 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
539 | if (hardif_neigh) | |
540 | goto out; | |
541 | ||
7a659d56 | 542 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
cef63419 ML |
543 | goto out; |
544 | ||
545 | hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC); | |
546 | if (!hardif_neigh) { | |
547 | batadv_hardif_free_ref(hard_iface); | |
548 | goto out; | |
549 | } | |
550 | ||
551 | INIT_HLIST_NODE(&hardif_neigh->list); | |
552 | ether_addr_copy(hardif_neigh->addr, neigh_addr); | |
553 | hardif_neigh->if_incoming = hard_iface; | |
554 | hardif_neigh->last_seen = jiffies; | |
555 | ||
90f564df | 556 | kref_init(&hardif_neigh->refcount); |
cef63419 | 557 | |
8248a4c7 ML |
558 | if (bat_priv->bat_algo_ops->bat_hardif_neigh_init) |
559 | bat_priv->bat_algo_ops->bat_hardif_neigh_init(hardif_neigh); | |
560 | ||
cef63419 ML |
561 | hlist_add_head(&hardif_neigh->list, &hard_iface->neigh_list); |
562 | ||
563 | out: | |
564 | spin_unlock_bh(&hard_iface->neigh_list_lock); | |
565 | return hardif_neigh; | |
566 | } | |
567 | ||
568 | /** | |
569 | * batadv_hardif_neigh_get_or_create - retrieve or create a hardif neighbour | |
570 | * node | |
571 | * @hard_iface: the interface this neighbour is connected to | |
572 | * @neigh_addr: the interface address of the neighbour to retrieve | |
573 | * | |
62fe710f | 574 | * Return: the hardif neighbour node if found or created or NULL otherwise. |
cef63419 ML |
575 | */ |
576 | static struct batadv_hardif_neigh_node * | |
577 | batadv_hardif_neigh_get_or_create(struct batadv_hard_iface *hard_iface, | |
578 | const u8 *neigh_addr) | |
579 | { | |
580 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; | |
581 | ||
582 | /* first check without locking to avoid the overhead */ | |
583 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
584 | if (hardif_neigh) | |
585 | return hardif_neigh; | |
586 | ||
587 | return batadv_hardif_neigh_create(hard_iface, neigh_addr); | |
588 | } | |
589 | ||
590 | /** | |
591 | * batadv_hardif_neigh_get - retrieve a hardif neighbour from the list | |
592 | * @hard_iface: the interface where this neighbour is connected to | |
593 | * @neigh_addr: the address of the neighbour | |
594 | * | |
595 | * Looks for and possibly returns a neighbour belonging to this hard interface. | |
62fe710f SE |
596 | * |
597 | * Return: neighbor when found. Othwerwise NULL | |
cef63419 ML |
598 | */ |
599 | struct batadv_hardif_neigh_node * | |
600 | batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface, | |
601 | const u8 *neigh_addr) | |
602 | { | |
603 | struct batadv_hardif_neigh_node *tmp_hardif_neigh, *hardif_neigh = NULL; | |
604 | ||
605 | rcu_read_lock(); | |
606 | hlist_for_each_entry_rcu(tmp_hardif_neigh, | |
607 | &hard_iface->neigh_list, list) { | |
608 | if (!batadv_compare_eth(tmp_hardif_neigh->addr, neigh_addr)) | |
609 | continue; | |
610 | ||
90f564df | 611 | if (!kref_get_unless_zero(&tmp_hardif_neigh->refcount)) |
cef63419 ML |
612 | continue; |
613 | ||
614 | hardif_neigh = tmp_hardif_neigh; | |
615 | break; | |
616 | } | |
617 | rcu_read_unlock(); | |
618 | ||
619 | return hardif_neigh; | |
620 | } | |
621 | ||
0538f759 AQ |
622 | /** |
623 | * batadv_neigh_node_new - create and init a new neigh_node object | |
3f32f8a6 | 624 | * @orig_node: originator object representing the neighbour |
0538f759 AQ |
625 | * @hard_iface: the interface where the neighbour is connected to |
626 | * @neigh_addr: the mac address of the neighbour interface | |
0538f759 AQ |
627 | * |
628 | * Allocates a new neigh_node object and initialises all the generic fields. | |
62fe710f SE |
629 | * |
630 | * Return: neighbor when found. Othwerwise NULL | |
0538f759 | 631 | */ |
56303d34 | 632 | struct batadv_neigh_node * |
3f32f8a6 ML |
633 | batadv_neigh_node_new(struct batadv_orig_node *orig_node, |
634 | struct batadv_hard_iface *hard_iface, | |
635 | const u8 *neigh_addr) | |
c6c8fea2 | 636 | { |
56303d34 | 637 | struct batadv_neigh_node *neigh_node; |
cef63419 | 638 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
c6c8fea2 | 639 | |
741aa06b ML |
640 | neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr); |
641 | if (neigh_node) | |
642 | goto out; | |
643 | ||
cef63419 ML |
644 | hardif_neigh = batadv_hardif_neigh_get_or_create(hard_iface, |
645 | neigh_addr); | |
646 | if (!hardif_neigh) | |
647 | goto out; | |
648 | ||
704509b8 | 649 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 650 | if (!neigh_node) |
7ae8b285 | 651 | goto out; |
c6c8fea2 | 652 | |
7a659d56 | 653 | if (!kref_get_unless_zero(&hard_iface->refcount)) { |
f729dc70 ML |
654 | kfree(neigh_node); |
655 | neigh_node = NULL; | |
656 | goto out; | |
657 | } | |
658 | ||
9591a79f | 659 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
660 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
661 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 662 | |
8fdd0153 | 663 | ether_addr_copy(neigh_node->addr, neigh_addr); |
0538f759 AQ |
664 | neigh_node->if_incoming = hard_iface; |
665 | neigh_node->orig_node = orig_node; | |
666 | ||
1605d0d6 | 667 | /* extra reference for return */ |
77ae32e8 SE |
668 | kref_init(&neigh_node->refcount); |
669 | kref_get(&neigh_node->refcount); | |
c6c8fea2 | 670 | |
741aa06b ML |
671 | spin_lock_bh(&orig_node->neigh_list_lock); |
672 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); | |
673 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
674 | ||
cef63419 | 675 | /* increment unique neighbor refcount */ |
90f564df | 676 | kref_get(&hardif_neigh->refcount); |
cef63419 | 677 | |
741aa06b ML |
678 | batadv_dbg(BATADV_DBG_BATMAN, orig_node->bat_priv, |
679 | "Creating new neighbor %pM for orig_node %pM on interface %s\n", | |
680 | neigh_addr, orig_node->orig, hard_iface->net_dev->name); | |
681 | ||
7ae8b285 | 682 | out: |
cef63419 ML |
683 | if (hardif_neigh) |
684 | batadv_hardif_neigh_free_ref(hardif_neigh); | |
c6c8fea2 SE |
685 | return neigh_node; |
686 | } | |
687 | ||
7587405a ML |
688 | /** |
689 | * batadv_hardif_neigh_seq_print_text - print the single hop neighbour list | |
690 | * @seq: neighbour table seq_file struct | |
691 | * @offset: not used | |
692 | * | |
62fe710f | 693 | * Return: always 0 |
7587405a ML |
694 | */ |
695 | int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset) | |
696 | { | |
697 | struct net_device *net_dev = (struct net_device *)seq->private; | |
698 | struct batadv_priv *bat_priv = netdev_priv(net_dev); | |
699 | struct batadv_hard_iface *primary_if; | |
700 | ||
701 | primary_if = batadv_seq_print_text_primary_if_get(seq); | |
702 | if (!primary_if) | |
703 | return 0; | |
704 | ||
705 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", | |
706 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, | |
707 | primary_if->net_dev->dev_addr, net_dev->name, | |
708 | bat_priv->bat_algo_ops->name); | |
709 | ||
710 | batadv_hardif_free_ref(primary_if); | |
711 | ||
712 | if (!bat_priv->bat_algo_ops->bat_neigh_print) { | |
713 | seq_puts(seq, | |
714 | "No printing function for this routing protocol\n"); | |
715 | return 0; | |
716 | } | |
717 | ||
718 | bat_priv->bat_algo_ops->bat_neigh_print(bat_priv, seq); | |
719 | return 0; | |
720 | } | |
721 | ||
7351a482 | 722 | /** |
2baa753c SE |
723 | * batadv_orig_ifinfo_release - release orig_ifinfo from lists and queue for |
724 | * free after rcu grace period | |
a6ba0d34 | 725 | * @ref: kref pointer of the orig_ifinfo |
7351a482 | 726 | */ |
a6ba0d34 | 727 | static void batadv_orig_ifinfo_release(struct kref *ref) |
7351a482 | 728 | { |
a6ba0d34 | 729 | struct batadv_orig_ifinfo *orig_ifinfo; |
000c8dff | 730 | struct batadv_neigh_node *router; |
7351a482 | 731 | |
a6ba0d34 SE |
732 | orig_ifinfo = container_of(ref, struct batadv_orig_ifinfo, refcount); |
733 | ||
7351a482 | 734 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
2baa753c | 735 | batadv_hardif_free_ref(orig_ifinfo->if_outgoing); |
7351a482 | 736 | |
000c8dff SW |
737 | /* this is the last reference to this object */ |
738 | router = rcu_dereference_protected(orig_ifinfo->router, true); | |
739 | if (router) | |
2baa753c SE |
740 | batadv_neigh_node_free_ref(router); |
741 | ||
742 | kfree_rcu(orig_ifinfo, rcu); | |
7351a482 SW |
743 | } |
744 | ||
745 | /** | |
deed9660 SE |
746 | * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly release |
747 | * the orig_ifinfo | |
7351a482 SW |
748 | * @orig_ifinfo: the orig_ifinfo object to release |
749 | */ | |
deed9660 | 750 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) |
7351a482 | 751 | { |
a6ba0d34 | 752 | kref_put(&orig_ifinfo->refcount, batadv_orig_ifinfo_release); |
7351a482 SW |
753 | } |
754 | ||
755 | /** | |
deed9660 SE |
756 | * batadv_orig_node_free_rcu - free the orig_node |
757 | * @rcu: rcu pointer of the orig_node | |
7351a482 | 758 | */ |
deed9660 | 759 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
7351a482 | 760 | { |
deed9660 SE |
761 | struct batadv_orig_node *orig_node; |
762 | ||
763 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); | |
764 | ||
765 | batadv_mcast_purge_orig(orig_node); | |
766 | ||
767 | batadv_frag_purge_orig(orig_node, NULL); | |
768 | ||
769 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) | |
770 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
771 | ||
772 | kfree(orig_node->tt_buff); | |
773 | kfree(orig_node); | |
7351a482 SW |
774 | } |
775 | ||
deed9660 SE |
776 | /** |
777 | * batadv_orig_node_release - release orig_node from lists and queue for | |
778 | * free after rcu grace period | |
7c124391 | 779 | * @ref: kref pointer of the orig_node |
deed9660 | 780 | */ |
7c124391 | 781 | static void batadv_orig_node_release(struct kref *ref) |
c6c8fea2 | 782 | { |
b67bfe0d | 783 | struct hlist_node *node_tmp; |
f6c8b711 | 784 | struct batadv_neigh_node *neigh_node; |
7c124391 | 785 | struct batadv_orig_node *orig_node; |
7351a482 | 786 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 787 | |
7c124391 SE |
788 | orig_node = container_of(ref, struct batadv_orig_node, refcount); |
789 | ||
f987ed6e ML |
790 | spin_lock_bh(&orig_node->neigh_list_lock); |
791 | ||
c6c8fea2 | 792 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 793 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 794 | &orig_node->neigh_list, list) { |
f987ed6e | 795 | hlist_del_rcu(&neigh_node->list); |
deed9660 | 796 | batadv_neigh_node_free_ref(neigh_node); |
c6c8fea2 SE |
797 | } |
798 | ||
7351a482 SW |
799 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
800 | &orig_node->ifinfo_list, list) { | |
801 | hlist_del_rcu(&orig_ifinfo->list); | |
deed9660 | 802 | batadv_orig_ifinfo_free_ref(orig_ifinfo); |
7351a482 | 803 | } |
f987ed6e ML |
804 | spin_unlock_bh(&orig_node->neigh_list_lock); |
805 | ||
d56b1705 MH |
806 | /* Free nc_nodes */ |
807 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
808 | ||
deed9660 | 809 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
c6c8fea2 SE |
810 | } |
811 | ||
72822225 | 812 | /** |
5d967310 | 813 | * batadv_orig_node_put - decrement the orig node refcounter and possibly |
deed9660 | 814 | * release it |
72822225 LL |
815 | * @orig_node: the orig node to free |
816 | */ | |
5d967310 | 817 | void batadv_orig_node_put(struct batadv_orig_node *orig_node) |
7b36e8ee | 818 | { |
7c124391 | 819 | kref_put(&orig_node->refcount, batadv_orig_node_release); |
7b36e8ee ML |
820 | } |
821 | ||
56303d34 | 822 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 823 | { |
5bf74e9c | 824 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 825 | struct hlist_node *node_tmp; |
16b1aba8 | 826 | struct hlist_head *head; |
16b1aba8 | 827 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 828 | struct batadv_orig_node *orig_node; |
6b5e971a | 829 | u32 i; |
16b1aba8 ML |
830 | |
831 | if (!hash) | |
c6c8fea2 SE |
832 | return; |
833 | ||
834 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
835 | ||
c6c8fea2 | 836 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
837 | |
838 | for (i = 0; i < hash->size; i++) { | |
839 | head = &hash->table[i]; | |
840 | list_lock = &hash->list_locks[i]; | |
841 | ||
842 | spin_lock_bh(list_lock); | |
b67bfe0d | 843 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 844 | head, hash_entry) { |
b67bfe0d | 845 | hlist_del_rcu(&orig_node->hash_entry); |
5d967310 | 846 | batadv_orig_node_put(orig_node); |
16b1aba8 ML |
847 | } |
848 | spin_unlock_bh(list_lock); | |
849 | } | |
850 | ||
1a8eaf07 | 851 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
852 | } |
853 | ||
bbad0a5e AQ |
854 | /** |
855 | * batadv_orig_node_new - creates a new orig_node | |
856 | * @bat_priv: the bat priv with all the soft interface information | |
857 | * @addr: the mac address of the originator | |
858 | * | |
859 | * Creates a new originator object and initialise all the generic fields. | |
860 | * The new object is not added to the originator list. | |
62fe710f SE |
861 | * |
862 | * Return: the newly created object or NULL on failure. | |
9cfc7bd6 | 863 | */ |
bbad0a5e | 864 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
6b5e971a | 865 | const u8 *addr) |
c6c8fea2 | 866 | { |
56303d34 | 867 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 868 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 869 | unsigned long reset_time; |
bbad0a5e | 870 | int i; |
c6c8fea2 | 871 | |
39c75a51 SE |
872 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
873 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 874 | |
704509b8 | 875 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
876 | if (!orig_node) |
877 | return NULL; | |
878 | ||
9591a79f | 879 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
d0fa4f3f | 880 | INIT_HLIST_HEAD(&orig_node->vlan_list); |
7351a482 | 881 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 882 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 883 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 884 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 885 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 886 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 887 | |
d56b1705 MH |
888 | batadv_nc_init_orig(orig_node); |
889 | ||
7b36e8ee | 890 | /* extra reference for return */ |
7c124391 SE |
891 | kref_init(&orig_node->refcount); |
892 | kref_get(&orig_node->refcount); | |
c6c8fea2 | 893 | |
16b1aba8 | 894 | orig_node->bat_priv = bat_priv; |
8fdd0153 | 895 | ether_addr_copy(orig_node->orig, addr); |
785ea114 | 896 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 897 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 898 | orig_node->tt_buff = NULL; |
a73105b8 | 899 | orig_node->tt_buff_len = 0; |
2c667a33 | 900 | orig_node->last_seen = jiffies; |
42d0b044 SE |
901 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
902 | orig_node->bcast_seqno_reset = reset_time; | |
8a4023c5 | 903 | |
60432d75 LL |
904 | #ifdef CONFIG_BATMAN_ADV_MCAST |
905 | orig_node->mcast_flags = BATADV_NO_FLAGS; | |
8a4023c5 LL |
906 | INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node); |
907 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node); | |
908 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node); | |
909 | spin_lock_init(&orig_node->mcast_handler_lock); | |
60432d75 | 910 | #endif |
c6c8fea2 | 911 | |
7ea7b4a1 AQ |
912 | /* create a vlan object for the "untagged" LAN */ |
913 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
914 | if (!vlan) | |
915 | goto free_orig_node; | |
916 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
917 | * Immediately release vlan since it is not needed anymore in this | |
918 | * context | |
919 | */ | |
920 | batadv_orig_node_vlan_free_ref(vlan); | |
921 | ||
610bfc6b MH |
922 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
923 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
924 | spin_lock_init(&orig_node->fragments[i].lock); | |
925 | orig_node->fragments[i].size = 0; | |
926 | } | |
927 | ||
c6c8fea2 | 928 | return orig_node; |
c6c8fea2 SE |
929 | free_orig_node: |
930 | kfree(orig_node); | |
931 | return NULL; | |
932 | } | |
933 | ||
709de13f SW |
934 | /** |
935 | * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor | |
936 | * @bat_priv: the bat priv with all the soft interface information | |
937 | * @neigh: orig node which is to be checked | |
938 | */ | |
939 | static void | |
940 | batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, | |
941 | struct batadv_neigh_node *neigh) | |
942 | { | |
943 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
944 | struct batadv_hard_iface *if_outgoing; | |
945 | struct hlist_node *node_tmp; | |
946 | ||
947 | spin_lock_bh(&neigh->ifinfo_lock); | |
948 | ||
949 | /* for all ifinfo objects for this neighinator */ | |
950 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
951 | &neigh->ifinfo_list, list) { | |
952 | if_outgoing = neigh_ifinfo->if_outgoing; | |
953 | ||
954 | /* always keep the default interface */ | |
955 | if (if_outgoing == BATADV_IF_DEFAULT) | |
956 | continue; | |
957 | ||
958 | /* don't purge if the interface is not (going) down */ | |
959 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
960 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
961 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
962 | continue; | |
963 | ||
964 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
965 | "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", | |
966 | neigh->addr, if_outgoing->net_dev->name); | |
967 | ||
968 | hlist_del_rcu(&neigh_ifinfo->list); | |
969 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
970 | } | |
971 | ||
972 | spin_unlock_bh(&neigh->ifinfo_lock); | |
973 | } | |
974 | ||
7351a482 SW |
975 | /** |
976 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
977 | * @bat_priv: the bat priv with all the soft interface information | |
978 | * @orig_node: orig node which is to be checked | |
979 | * | |
62fe710f | 980 | * Return: true if any ifinfo entry was purged, false otherwise. |
7351a482 SW |
981 | */ |
982 | static bool | |
983 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
984 | struct batadv_orig_node *orig_node) | |
985 | { | |
986 | struct batadv_orig_ifinfo *orig_ifinfo; | |
987 | struct batadv_hard_iface *if_outgoing; | |
988 | struct hlist_node *node_tmp; | |
989 | bool ifinfo_purged = false; | |
990 | ||
991 | spin_lock_bh(&orig_node->neigh_list_lock); | |
992 | ||
993 | /* for all ifinfo objects for this originator */ | |
994 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
995 | &orig_node->ifinfo_list, list) { | |
996 | if_outgoing = orig_ifinfo->if_outgoing; | |
997 | ||
998 | /* always keep the default interface */ | |
999 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1000 | continue; | |
1001 | ||
1002 | /* don't purge if the interface is not (going) down */ | |
1003 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
1004 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
1005 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
1006 | continue; | |
1007 | ||
1008 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1009 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
1010 | orig_node->orig, if_outgoing->net_dev->name); | |
1011 | ||
1012 | ifinfo_purged = true; | |
1013 | ||
1014 | hlist_del_rcu(&orig_ifinfo->list); | |
1015 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
f3b3d901 SW |
1016 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
1017 | orig_node->last_bonding_candidate = NULL; | |
1018 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
1019 | } | |
7351a482 SW |
1020 | } |
1021 | ||
1022 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
1023 | ||
1024 | return ifinfo_purged; | |
1025 | } | |
1026 | ||
89652331 SW |
1027 | /** |
1028 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
1029 | * @bat_priv: the bat priv with all the soft interface information | |
1030 | * @orig_node: orig node which is to be checked | |
1031 | * | |
62fe710f | 1032 | * Return: true if any neighbor was purged, false otherwise |
89652331 | 1033 | */ |
56303d34 SE |
1034 | static bool |
1035 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 1036 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 1037 | { |
b67bfe0d | 1038 | struct hlist_node *node_tmp; |
56303d34 | 1039 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 1040 | bool neigh_purged = false; |
0b0094e0 | 1041 | unsigned long last_seen; |
56303d34 | 1042 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 1043 | |
f987ed6e ML |
1044 | spin_lock_bh(&orig_node->neigh_list_lock); |
1045 | ||
c6c8fea2 | 1046 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 1047 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 1048 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1049 | last_seen = neigh_node->last_seen; |
1050 | if_incoming = neigh_node->if_incoming; | |
1051 | ||
42d0b044 | 1052 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
1053 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
1054 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1055 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
1056 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
1057 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1058 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 1059 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1060 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
1061 | orig_node->orig, neigh_node->addr, | |
1062 | if_incoming->net_dev->name); | |
c6c8fea2 | 1063 | else |
39c75a51 | 1064 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1065 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
1066 | orig_node->orig, neigh_node->addr, | |
1067 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
1068 | |
1069 | neigh_purged = true; | |
9591a79f | 1070 | |
f987ed6e | 1071 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 1072 | batadv_neigh_node_free_ref(neigh_node); |
709de13f SW |
1073 | } else { |
1074 | /* only necessary if not the whole neighbor is to be | |
1075 | * deleted, but some interface has been removed. | |
1076 | */ | |
1077 | batadv_purge_neigh_ifinfo(bat_priv, neigh_node); | |
c6c8fea2 SE |
1078 | } |
1079 | } | |
f987ed6e ML |
1080 | |
1081 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
1082 | return neigh_purged; |
1083 | } | |
1084 | ||
89652331 SW |
1085 | /** |
1086 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
1087 | * @bat_priv: the bat priv with all the soft interface information | |
1088 | * @orig_node: orig node which is to be checked | |
1089 | * @if_outgoing: the interface for which the metric should be compared | |
1090 | * | |
62fe710f | 1091 | * Return: the current best neighbor, with refcount increased. |
89652331 SW |
1092 | */ |
1093 | static struct batadv_neigh_node * | |
1094 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
1095 | struct batadv_orig_node *orig_node, | |
1096 | struct batadv_hard_iface *if_outgoing) | |
1097 | { | |
1098 | struct batadv_neigh_node *best = NULL, *neigh; | |
1099 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
1100 | ||
1101 | rcu_read_lock(); | |
1102 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
1103 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
1104 | best, if_outgoing) <= 0)) | |
1105 | continue; | |
1106 | ||
77ae32e8 | 1107 | if (!kref_get_unless_zero(&neigh->refcount)) |
89652331 SW |
1108 | continue; |
1109 | ||
1110 | if (best) | |
1111 | batadv_neigh_node_free_ref(best); | |
1112 | ||
1113 | best = neigh; | |
1114 | } | |
1115 | rcu_read_unlock(); | |
1116 | ||
1117 | return best; | |
1118 | } | |
1119 | ||
7351a482 SW |
1120 | /** |
1121 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
1122 | * @bat_priv: the bat priv with all the soft interface information | |
1123 | * @orig_node: orig node which is to be checked | |
1124 | * | |
1125 | * This function checks if the orig_node or substructures of it have become | |
1126 | * obsolete, and purges this information if that's the case. | |
1127 | * | |
62fe710f | 1128 | * Return: true if the orig_node is to be removed, false otherwise. |
7351a482 | 1129 | */ |
56303d34 SE |
1130 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
1131 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 1132 | { |
56303d34 | 1133 | struct batadv_neigh_node *best_neigh_node; |
7351a482 | 1134 | struct batadv_hard_iface *hard_iface; |
7b955a9f | 1135 | bool changed_ifinfo, changed_neigh; |
c6c8fea2 | 1136 | |
42d0b044 SE |
1137 | if (batadv_has_timed_out(orig_node->last_seen, |
1138 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 1139 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1140 | "Originator timeout: originator %pM, last_seen %u\n", |
1141 | orig_node->orig, | |
1142 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 1143 | return true; |
c6c8fea2 | 1144 | } |
7b955a9f SW |
1145 | changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
1146 | changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); | |
7351a482 | 1147 | |
7b955a9f | 1148 | if (!changed_ifinfo && !changed_neigh) |
89652331 SW |
1149 | return false; |
1150 | ||
7351a482 | 1151 | /* first for NULL ... */ |
89652331 SW |
1152 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
1153 | BATADV_IF_DEFAULT); | |
7351a482 SW |
1154 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
1155 | best_neigh_node); | |
89652331 SW |
1156 | if (best_neigh_node) |
1157 | batadv_neigh_node_free_ref(best_neigh_node); | |
c6c8fea2 | 1158 | |
7351a482 SW |
1159 | /* ... then for all other interfaces. */ |
1160 | rcu_read_lock(); | |
1161 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1162 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1163 | continue; | |
1164 | ||
1165 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1166 | continue; | |
1167 | ||
1168 | best_neigh_node = batadv_find_best_neighbor(bat_priv, | |
1169 | orig_node, | |
1170 | hard_iface); | |
1171 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
1172 | best_neigh_node); | |
1173 | if (best_neigh_node) | |
1174 | batadv_neigh_node_free_ref(best_neigh_node); | |
1175 | } | |
1176 | rcu_read_unlock(); | |
1177 | ||
c6c8fea2 SE |
1178 | return false; |
1179 | } | |
1180 | ||
56303d34 | 1181 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 1182 | { |
5bf74e9c | 1183 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 1184 | struct hlist_node *node_tmp; |
c6c8fea2 | 1185 | struct hlist_head *head; |
fb778ea1 | 1186 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 1187 | struct batadv_orig_node *orig_node; |
6b5e971a | 1188 | u32 i; |
c6c8fea2 SE |
1189 | |
1190 | if (!hash) | |
1191 | return; | |
1192 | ||
c6c8fea2 SE |
1193 | /* for all origins... */ |
1194 | for (i = 0; i < hash->size; i++) { | |
1195 | head = &hash->table[i]; | |
fb778ea1 | 1196 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1197 | |
fb778ea1 | 1198 | spin_lock_bh(list_lock); |
b67bfe0d | 1199 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 1200 | head, hash_entry) { |
03fc7f86 | 1201 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 1202 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 1203 | hlist_del_rcu(&orig_node->hash_entry); |
9d31b3ce LL |
1204 | batadv_tt_global_del_orig(orig_node->bat_priv, |
1205 | orig_node, -1, | |
1206 | "originator timed out"); | |
5d967310 | 1207 | batadv_orig_node_put(orig_node); |
fb778ea1 | 1208 | continue; |
c6c8fea2 | 1209 | } |
610bfc6b MH |
1210 | |
1211 | batadv_frag_purge_orig(orig_node, | |
1212 | batadv_frag_check_entry); | |
c6c8fea2 | 1213 | } |
fb778ea1 | 1214 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
1215 | } |
1216 | ||
7cf06bc6 | 1217 | batadv_gw_election(bat_priv); |
c6c8fea2 SE |
1218 | } |
1219 | ||
03fc7f86 | 1220 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 1221 | { |
56303d34 SE |
1222 | struct delayed_work *delayed_work; |
1223 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1224 | |
56303d34 SE |
1225 | delayed_work = container_of(work, struct delayed_work, work); |
1226 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 1227 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
1228 | queue_delayed_work(batadv_event_workqueue, |
1229 | &bat_priv->orig_work, | |
1230 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
1231 | } |
1232 | ||
56303d34 | 1233 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 1234 | { |
03fc7f86 | 1235 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
1236 | } |
1237 | ||
7d211efc | 1238 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1239 | { |
1240 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1241 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 1242 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 1243 | |
30da63a6 ML |
1244 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1245 | if (!primary_if) | |
737a2a22 | 1246 | return 0; |
c6c8fea2 | 1247 | |
737a2a22 | 1248 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 1249 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
1250 | primary_if->net_dev->dev_addr, net_dev->name, |
1251 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 1252 | |
737a2a22 | 1253 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 1254 | |
737a2a22 AQ |
1255 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
1256 | seq_puts(seq, | |
1257 | "No printing function for this routing protocol\n"); | |
1258 | return 0; | |
c6c8fea2 SE |
1259 | } |
1260 | ||
cb1c92ec SW |
1261 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, |
1262 | BATADV_IF_DEFAULT); | |
c6c8fea2 | 1263 | |
30da63a6 | 1264 | return 0; |
c6c8fea2 SE |
1265 | } |
1266 | ||
cb1c92ec SW |
1267 | /** |
1268 | * batadv_orig_hardif_seq_print_text - writes originator infos for a specific | |
1269 | * outgoing interface | |
1270 | * @seq: debugfs table seq_file struct | |
1271 | * @offset: not used | |
1272 | * | |
62fe710f | 1273 | * Return: 0 |
cb1c92ec SW |
1274 | */ |
1275 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) | |
1276 | { | |
1277 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1278 | struct batadv_hard_iface *hard_iface; | |
1279 | struct batadv_priv *bat_priv; | |
1280 | ||
1281 | hard_iface = batadv_hardif_get_by_netdev(net_dev); | |
1282 | ||
1283 | if (!hard_iface || !hard_iface->soft_iface) { | |
1284 | seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); | |
1285 | goto out; | |
1286 | } | |
1287 | ||
1288 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
1289 | if (!bat_priv->bat_algo_ops->bat_orig_print) { | |
1290 | seq_puts(seq, | |
1291 | "No printing function for this routing protocol\n"); | |
1292 | goto out; | |
1293 | } | |
1294 | ||
1295 | if (hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1296 | seq_puts(seq, "Interface not active\n"); | |
1297 | goto out; | |
1298 | } | |
1299 | ||
1300 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", | |
1301 | BATADV_SOURCE_VERSION, hard_iface->net_dev->name, | |
1302 | hard_iface->net_dev->dev_addr, | |
1303 | hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); | |
1304 | ||
1305 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); | |
1306 | ||
1307 | out: | |
16a41423 ML |
1308 | if (hard_iface) |
1309 | batadv_hardif_free_ref(hard_iface); | |
cb1c92ec SW |
1310 | return 0; |
1311 | } | |
1312 | ||
56303d34 SE |
1313 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
1314 | int max_if_num) | |
c6c8fea2 | 1315 | { |
56303d34 | 1316 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 1317 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 1318 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1319 | struct hlist_head *head; |
56303d34 | 1320 | struct batadv_orig_node *orig_node; |
6b5e971a | 1321 | u32 i; |
c90681b8 | 1322 | int ret; |
c6c8fea2 SE |
1323 | |
1324 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1325 | * if_num |
1326 | */ | |
c6c8fea2 SE |
1327 | for (i = 0; i < hash->size; i++) { |
1328 | head = &hash->table[i]; | |
1329 | ||
fb778ea1 | 1330 | rcu_read_lock(); |
b67bfe0d | 1331 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1332 | ret = 0; |
1333 | if (bao->bat_orig_add_if) | |
1334 | ret = bao->bat_orig_add_if(orig_node, | |
1335 | max_if_num); | |
5346c35e | 1336 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1337 | goto err; |
1338 | } | |
fb778ea1 | 1339 | rcu_read_unlock(); |
c6c8fea2 SE |
1340 | } |
1341 | ||
c6c8fea2 SE |
1342 | return 0; |
1343 | ||
1344 | err: | |
fb778ea1 | 1345 | rcu_read_unlock(); |
c6c8fea2 SE |
1346 | return -ENOMEM; |
1347 | } | |
1348 | ||
56303d34 SE |
1349 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
1350 | int max_if_num) | |
c6c8fea2 | 1351 | { |
56303d34 | 1352 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 1353 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1354 | struct hlist_head *head; |
56303d34 SE |
1355 | struct batadv_hard_iface *hard_iface_tmp; |
1356 | struct batadv_orig_node *orig_node; | |
d0015fdd | 1357 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
6b5e971a | 1358 | u32 i; |
c90681b8 | 1359 | int ret; |
c6c8fea2 SE |
1360 | |
1361 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1362 | * if_num |
1363 | */ | |
c6c8fea2 SE |
1364 | for (i = 0; i < hash->size; i++) { |
1365 | head = &hash->table[i]; | |
1366 | ||
fb778ea1 | 1367 | rcu_read_lock(); |
b67bfe0d | 1368 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1369 | ret = 0; |
1370 | if (bao->bat_orig_del_if) | |
1371 | ret = bao->bat_orig_del_if(orig_node, | |
1372 | max_if_num, | |
1373 | hard_iface->if_num); | |
5346c35e | 1374 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1375 | goto err; |
1376 | } | |
fb778ea1 | 1377 | rcu_read_unlock(); |
c6c8fea2 SE |
1378 | } |
1379 | ||
1380 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1381 | rcu_read_lock(); | |
3193e8fd | 1382 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1383 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1384 | continue; |
1385 | ||
e6c10f43 | 1386 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1387 | continue; |
1388 | ||
e6c10f43 | 1389 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1390 | continue; |
1391 | ||
e6c10f43 ML |
1392 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1393 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1394 | } |
1395 | rcu_read_unlock(); | |
1396 | ||
e6c10f43 | 1397 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1398 | return 0; |
1399 | ||
1400 | err: | |
fb778ea1 | 1401 | rcu_read_unlock(); |
c6c8fea2 SE |
1402 | return -ENOMEM; |
1403 | } |