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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 | 56 | * |
4b426b10 | 57 | * Return: true if they are the same originator |
62fe710f | 58 | */ |
4b426b10 | 59 | bool 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 SW |
253 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
254 | ||
77ae32e8 | 255 | neigh_node = container_of(ref, struct batadv_neigh_node, refcount); |
89652331 SW |
256 | |
257 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
258 | &neigh_node->ifinfo_list, list) { | |
044fa3ae | 259 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 260 | } |
bcef1f3c | 261 | |
abe59c65 | 262 | batadv_hardif_neigh_put(neigh_node->hardif_neigh); |
cef63419 | 263 | |
82047ad7 | 264 | batadv_hardif_put(neigh_node->if_incoming); |
89652331 | 265 | |
b4d922cf | 266 | kfree_rcu(neigh_node, rcu); |
89652331 SW |
267 | } |
268 | ||
89652331 | 269 | /** |
25bb2509 | 270 | * batadv_neigh_node_put - decrement the neighbors refcounter and possibly |
77ae32e8 | 271 | * release it |
89652331 SW |
272 | * @neigh_node: neigh neighbor to free |
273 | */ | |
25bb2509 | 274 | void batadv_neigh_node_put(struct batadv_neigh_node *neigh_node) |
a4c135c5 | 275 | { |
77ae32e8 | 276 | kref_put(&neigh_node->refcount, batadv_neigh_node_release); |
a4c135c5 SW |
277 | } |
278 | ||
7351a482 | 279 | /** |
6d030de8 | 280 | * batadv_orig_router_get - router to the originator depending on iface |
7351a482 SW |
281 | * @orig_node: the orig node for the router |
282 | * @if_outgoing: the interface where the payload packet has been received or | |
283 | * the OGM should be sent to | |
284 | * | |
62fe710f | 285 | * Return: the neighbor which should be router for this orig_node/iface. |
7351a482 SW |
286 | * |
287 | * The object is returned with refcounter increased by 1. | |
288 | */ | |
56303d34 | 289 | struct batadv_neigh_node * |
7351a482 SW |
290 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
291 | const struct batadv_hard_iface *if_outgoing) | |
e1a5382f | 292 | { |
7351a482 SW |
293 | struct batadv_orig_ifinfo *orig_ifinfo; |
294 | struct batadv_neigh_node *router = NULL; | |
e1a5382f LL |
295 | |
296 | rcu_read_lock(); | |
7351a482 SW |
297 | hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { |
298 | if (orig_ifinfo->if_outgoing != if_outgoing) | |
299 | continue; | |
300 | ||
301 | router = rcu_dereference(orig_ifinfo->router); | |
302 | break; | |
303 | } | |
e1a5382f | 304 | |
77ae32e8 | 305 | if (router && !kref_get_unless_zero(&router->refcount)) |
e1a5382f LL |
306 | router = NULL; |
307 | ||
308 | rcu_read_unlock(); | |
309 | return router; | |
310 | } | |
311 | ||
7351a482 SW |
312 | /** |
313 | * batadv_orig_ifinfo_get - find the ifinfo from an orig_node | |
314 | * @orig_node: the orig node to be queried | |
315 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
316 | * | |
62fe710f | 317 | * Return: the requested orig_ifinfo or NULL if not found. |
7351a482 SW |
318 | * |
319 | * The object is returned with refcounter increased by 1. | |
320 | */ | |
321 | struct batadv_orig_ifinfo * | |
322 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
323 | struct batadv_hard_iface *if_outgoing) | |
324 | { | |
325 | struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; | |
326 | ||
327 | rcu_read_lock(); | |
328 | hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, | |
329 | list) { | |
330 | if (tmp->if_outgoing != if_outgoing) | |
331 | continue; | |
332 | ||
a6ba0d34 | 333 | if (!kref_get_unless_zero(&tmp->refcount)) |
7351a482 SW |
334 | continue; |
335 | ||
336 | orig_ifinfo = tmp; | |
337 | break; | |
338 | } | |
339 | rcu_read_unlock(); | |
340 | ||
341 | return orig_ifinfo; | |
342 | } | |
343 | ||
344 | /** | |
345 | * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object | |
346 | * @orig_node: the orig node to be queried | |
347 | * @if_outgoing: the interface for which the ifinfo should be acquired | |
348 | * | |
62fe710f | 349 | * Return: NULL in case of failure or the orig_ifinfo object for the if_outgoing |
7351a482 SW |
350 | * interface otherwise. The object is created and added to the list |
351 | * if it does not exist. | |
352 | * | |
353 | * The object is returned with refcounter increased by 1. | |
354 | */ | |
355 | struct batadv_orig_ifinfo * | |
356 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
357 | struct batadv_hard_iface *if_outgoing) | |
358 | { | |
359 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; | |
360 | unsigned long reset_time; | |
361 | ||
362 | spin_lock_bh(&orig_node->neigh_list_lock); | |
363 | ||
364 | orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); | |
365 | if (orig_ifinfo) | |
366 | goto out; | |
367 | ||
368 | orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); | |
369 | if (!orig_ifinfo) | |
370 | goto out; | |
371 | ||
17a86915 SE |
372 | if (if_outgoing != BATADV_IF_DEFAULT) |
373 | kref_get(&if_outgoing->refcount); | |
7351a482 SW |
374 | |
375 | reset_time = jiffies - 1; | |
376 | reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); | |
377 | orig_ifinfo->batman_seqno_reset = reset_time; | |
378 | orig_ifinfo->if_outgoing = if_outgoing; | |
379 | INIT_HLIST_NODE(&orig_ifinfo->list); | |
a6ba0d34 SE |
380 | kref_init(&orig_ifinfo->refcount); |
381 | kref_get(&orig_ifinfo->refcount); | |
7351a482 SW |
382 | hlist_add_head_rcu(&orig_ifinfo->list, |
383 | &orig_node->ifinfo_list); | |
384 | out: | |
385 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
386 | return orig_ifinfo; | |
387 | } | |
388 | ||
89652331 SW |
389 | /** |
390 | * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node | |
e51f0397 | 391 | * @neigh: the neigh node to be queried |
89652331 SW |
392 | * @if_outgoing: the interface for which the ifinfo should be acquired |
393 | * | |
394 | * The object is returned with refcounter increased by 1. | |
395 | * | |
62fe710f | 396 | * Return: the requested neigh_ifinfo or NULL if not found |
89652331 SW |
397 | */ |
398 | struct batadv_neigh_ifinfo * | |
399 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
400 | struct batadv_hard_iface *if_outgoing) | |
401 | { | |
402 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, | |
403 | *tmp_neigh_ifinfo; | |
404 | ||
405 | rcu_read_lock(); | |
406 | hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, | |
407 | list) { | |
408 | if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) | |
409 | continue; | |
410 | ||
962c6832 | 411 | if (!kref_get_unless_zero(&tmp_neigh_ifinfo->refcount)) |
89652331 SW |
412 | continue; |
413 | ||
414 | neigh_ifinfo = tmp_neigh_ifinfo; | |
415 | break; | |
416 | } | |
417 | rcu_read_unlock(); | |
418 | ||
419 | return neigh_ifinfo; | |
420 | } | |
421 | ||
422 | /** | |
423 | * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object | |
e51f0397 | 424 | * @neigh: the neigh node to be queried |
89652331 SW |
425 | * @if_outgoing: the interface for which the ifinfo should be acquired |
426 | * | |
62fe710f | 427 | * Return: NULL in case of failure or the neigh_ifinfo object for the |
89652331 SW |
428 | * if_outgoing interface otherwise. The object is created and added to the list |
429 | * if it does not exist. | |
430 | * | |
431 | * The object is returned with refcounter increased by 1. | |
432 | */ | |
433 | struct batadv_neigh_ifinfo * | |
434 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
435 | struct batadv_hard_iface *if_outgoing) | |
436 | { | |
437 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
438 | ||
439 | spin_lock_bh(&neigh->ifinfo_lock); | |
440 | ||
441 | neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); | |
442 | if (neigh_ifinfo) | |
443 | goto out; | |
444 | ||
445 | neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); | |
446 | if (!neigh_ifinfo) | |
447 | goto out; | |
448 | ||
17a86915 SE |
449 | if (if_outgoing) |
450 | kref_get(&if_outgoing->refcount); | |
89652331 SW |
451 | |
452 | INIT_HLIST_NODE(&neigh_ifinfo->list); | |
962c6832 SE |
453 | kref_init(&neigh_ifinfo->refcount); |
454 | kref_get(&neigh_ifinfo->refcount); | |
89652331 SW |
455 | neigh_ifinfo->if_outgoing = if_outgoing; |
456 | ||
457 | hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); | |
458 | ||
459 | out: | |
460 | spin_unlock_bh(&neigh->ifinfo_lock); | |
461 | ||
462 | return neigh_ifinfo; | |
463 | } | |
464 | ||
ed292663 ML |
465 | /** |
466 | * batadv_neigh_node_get - retrieve a neighbour from the list | |
467 | * @orig_node: originator which the neighbour belongs to | |
468 | * @hard_iface: the interface where this neighbour is connected to | |
469 | * @addr: the address of the neighbour | |
470 | * | |
471 | * Looks for and possibly returns a neighbour belonging to this originator list | |
472 | * which is connected through the provided hard interface. | |
62fe710f SE |
473 | * |
474 | * Return: neighbor when found. Othwerwise NULL | |
ed292663 ML |
475 | */ |
476 | static struct batadv_neigh_node * | |
477 | batadv_neigh_node_get(const struct batadv_orig_node *orig_node, | |
478 | const struct batadv_hard_iface *hard_iface, | |
479 | const u8 *addr) | |
480 | { | |
481 | struct batadv_neigh_node *tmp_neigh_node, *res = NULL; | |
482 | ||
483 | rcu_read_lock(); | |
484 | hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { | |
485 | if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) | |
486 | continue; | |
487 | ||
488 | if (tmp_neigh_node->if_incoming != hard_iface) | |
489 | continue; | |
490 | ||
77ae32e8 | 491 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
ed292663 ML |
492 | continue; |
493 | ||
494 | res = tmp_neigh_node; | |
495 | break; | |
496 | } | |
497 | rcu_read_unlock(); | |
498 | ||
499 | return res; | |
500 | } | |
501 | ||
cef63419 ML |
502 | /** |
503 | * batadv_hardif_neigh_create - create a hardif neighbour node | |
504 | * @hard_iface: the interface this neighbour is connected to | |
505 | * @neigh_addr: the interface address of the neighbour to retrieve | |
506 | * | |
62fe710f | 507 | * Return: the hardif neighbour node if found or created or NULL otherwise. |
cef63419 ML |
508 | */ |
509 | static struct batadv_hardif_neigh_node * | |
510 | batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface, | |
511 | const u8 *neigh_addr) | |
512 | { | |
8248a4c7 | 513 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
cef63419 ML |
514 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
515 | ||
516 | spin_lock_bh(&hard_iface->neigh_list_lock); | |
517 | ||
518 | /* check if neighbor hasn't been added in the meantime */ | |
519 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
520 | if (hardif_neigh) | |
521 | goto out; | |
522 | ||
cef63419 | 523 | hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC); |
17a86915 | 524 | if (!hardif_neigh) |
cef63419 | 525 | goto out; |
cef63419 | 526 | |
17a86915 | 527 | kref_get(&hard_iface->refcount); |
cef63419 ML |
528 | INIT_HLIST_NODE(&hardif_neigh->list); |
529 | ether_addr_copy(hardif_neigh->addr, neigh_addr); | |
530 | hardif_neigh->if_incoming = hard_iface; | |
531 | hardif_neigh->last_seen = jiffies; | |
532 | ||
90f564df | 533 | kref_init(&hardif_neigh->refcount); |
cef63419 | 534 | |
8248a4c7 ML |
535 | if (bat_priv->bat_algo_ops->bat_hardif_neigh_init) |
536 | bat_priv->bat_algo_ops->bat_hardif_neigh_init(hardif_neigh); | |
537 | ||
cef63419 ML |
538 | hlist_add_head(&hardif_neigh->list, &hard_iface->neigh_list); |
539 | ||
540 | out: | |
541 | spin_unlock_bh(&hard_iface->neigh_list_lock); | |
542 | return hardif_neigh; | |
543 | } | |
544 | ||
545 | /** | |
546 | * batadv_hardif_neigh_get_or_create - retrieve or create a hardif neighbour | |
547 | * node | |
548 | * @hard_iface: the interface this neighbour is connected to | |
549 | * @neigh_addr: the interface address of the neighbour to retrieve | |
550 | * | |
62fe710f | 551 | * Return: the hardif neighbour node if found or created or NULL otherwise. |
cef63419 ML |
552 | */ |
553 | static struct batadv_hardif_neigh_node * | |
554 | batadv_hardif_neigh_get_or_create(struct batadv_hard_iface *hard_iface, | |
555 | const u8 *neigh_addr) | |
556 | { | |
557 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; | |
558 | ||
559 | /* first check without locking to avoid the overhead */ | |
560 | hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr); | |
561 | if (hardif_neigh) | |
562 | return hardif_neigh; | |
563 | ||
564 | return batadv_hardif_neigh_create(hard_iface, neigh_addr); | |
565 | } | |
566 | ||
567 | /** | |
568 | * batadv_hardif_neigh_get - retrieve a hardif neighbour from the list | |
569 | * @hard_iface: the interface where this neighbour is connected to | |
570 | * @neigh_addr: the address of the neighbour | |
571 | * | |
572 | * Looks for and possibly returns a neighbour belonging to this hard interface. | |
62fe710f SE |
573 | * |
574 | * Return: neighbor when found. Othwerwise NULL | |
cef63419 ML |
575 | */ |
576 | struct batadv_hardif_neigh_node * | |
577 | batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface, | |
578 | const u8 *neigh_addr) | |
579 | { | |
580 | struct batadv_hardif_neigh_node *tmp_hardif_neigh, *hardif_neigh = NULL; | |
581 | ||
582 | rcu_read_lock(); | |
583 | hlist_for_each_entry_rcu(tmp_hardif_neigh, | |
584 | &hard_iface->neigh_list, list) { | |
585 | if (!batadv_compare_eth(tmp_hardif_neigh->addr, neigh_addr)) | |
586 | continue; | |
587 | ||
90f564df | 588 | if (!kref_get_unless_zero(&tmp_hardif_neigh->refcount)) |
cef63419 ML |
589 | continue; |
590 | ||
591 | hardif_neigh = tmp_hardif_neigh; | |
592 | break; | |
593 | } | |
594 | rcu_read_unlock(); | |
595 | ||
596 | return hardif_neigh; | |
597 | } | |
598 | ||
0538f759 | 599 | /** |
6f0a6b5e | 600 | * batadv_neigh_node_create - create a neigh node object |
3f32f8a6 | 601 | * @orig_node: originator object representing the neighbour |
0538f759 AQ |
602 | * @hard_iface: the interface where the neighbour is connected to |
603 | * @neigh_addr: the mac address of the neighbour interface | |
0538f759 AQ |
604 | * |
605 | * Allocates a new neigh_node object and initialises all the generic fields. | |
62fe710f | 606 | * |
6f0a6b5e | 607 | * Return: the neighbour node if found or created or NULL otherwise. |
0538f759 | 608 | */ |
6f0a6b5e ML |
609 | static struct batadv_neigh_node * |
610 | batadv_neigh_node_create(struct batadv_orig_node *orig_node, | |
611 | struct batadv_hard_iface *hard_iface, | |
612 | const u8 *neigh_addr) | |
c6c8fea2 | 613 | { |
56303d34 | 614 | struct batadv_neigh_node *neigh_node; |
cef63419 | 615 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
c6c8fea2 | 616 | |
e123705e LL |
617 | spin_lock_bh(&orig_node->neigh_list_lock); |
618 | ||
741aa06b ML |
619 | neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr); |
620 | if (neigh_node) | |
621 | goto out; | |
622 | ||
cef63419 ML |
623 | hardif_neigh = batadv_hardif_neigh_get_or_create(hard_iface, |
624 | neigh_addr); | |
625 | if (!hardif_neigh) | |
626 | goto out; | |
627 | ||
704509b8 | 628 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 629 | if (!neigh_node) |
7ae8b285 | 630 | goto out; |
c6c8fea2 | 631 | |
9591a79f | 632 | INIT_HLIST_NODE(&neigh_node->list); |
89652331 SW |
633 | INIT_HLIST_HEAD(&neigh_node->ifinfo_list); |
634 | spin_lock_init(&neigh_node->ifinfo_lock); | |
c6c8fea2 | 635 | |
17a86915 | 636 | kref_get(&hard_iface->refcount); |
8fdd0153 | 637 | ether_addr_copy(neigh_node->addr, neigh_addr); |
0538f759 AQ |
638 | neigh_node->if_incoming = hard_iface; |
639 | neigh_node->orig_node = orig_node; | |
e48474ed | 640 | neigh_node->last_seen = jiffies; |
0538f759 | 641 | |
abe59c65 SE |
642 | /* increment unique neighbor refcount */ |
643 | kref_get(&hardif_neigh->refcount); | |
644 | neigh_node->hardif_neigh = hardif_neigh; | |
645 | ||
1605d0d6 | 646 | /* extra reference for return */ |
77ae32e8 SE |
647 | kref_init(&neigh_node->refcount); |
648 | kref_get(&neigh_node->refcount); | |
c6c8fea2 | 649 | |
741aa06b | 650 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); |
741aa06b ML |
651 | |
652 | batadv_dbg(BATADV_DBG_BATMAN, orig_node->bat_priv, | |
653 | "Creating new neighbor %pM for orig_node %pM on interface %s\n", | |
654 | neigh_addr, orig_node->orig, hard_iface->net_dev->name); | |
655 | ||
7ae8b285 | 656 | out: |
e123705e LL |
657 | spin_unlock_bh(&orig_node->neigh_list_lock); |
658 | ||
cef63419 | 659 | if (hardif_neigh) |
accadc35 | 660 | batadv_hardif_neigh_put(hardif_neigh); |
c6c8fea2 SE |
661 | return neigh_node; |
662 | } | |
663 | ||
6f0a6b5e ML |
664 | /** |
665 | * batadv_neigh_node_get_or_create - retrieve or create a neigh node object | |
666 | * @orig_node: originator object representing the neighbour | |
667 | * @hard_iface: the interface where the neighbour is connected to | |
668 | * @neigh_addr: the mac address of the neighbour interface | |
669 | * | |
670 | * Return: the neighbour node if found or created or NULL otherwise. | |
671 | */ | |
672 | struct batadv_neigh_node * | |
673 | batadv_neigh_node_get_or_create(struct batadv_orig_node *orig_node, | |
674 | struct batadv_hard_iface *hard_iface, | |
675 | const u8 *neigh_addr) | |
676 | { | |
677 | struct batadv_neigh_node *neigh_node = NULL; | |
678 | ||
679 | /* first check without locking to avoid the overhead */ | |
680 | neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr); | |
681 | if (neigh_node) | |
682 | return neigh_node; | |
683 | ||
684 | return batadv_neigh_node_create(orig_node, hard_iface, neigh_addr); | |
685 | } | |
686 | ||
7587405a ML |
687 | /** |
688 | * batadv_hardif_neigh_seq_print_text - print the single hop neighbour list | |
689 | * @seq: neighbour table seq_file struct | |
690 | * @offset: not used | |
691 | * | |
62fe710f | 692 | * Return: always 0 |
7587405a ML |
693 | */ |
694 | int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset) | |
695 | { | |
696 | struct net_device *net_dev = (struct net_device *)seq->private; | |
697 | struct batadv_priv *bat_priv = netdev_priv(net_dev); | |
698 | struct batadv_hard_iface *primary_if; | |
699 | ||
700 | primary_if = batadv_seq_print_text_primary_if_get(seq); | |
701 | if (!primary_if) | |
702 | return 0; | |
703 | ||
704 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", | |
705 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, | |
706 | primary_if->net_dev->dev_addr, net_dev->name, | |
707 | bat_priv->bat_algo_ops->name); | |
708 | ||
82047ad7 | 709 | batadv_hardif_put(primary_if); |
7587405a ML |
710 | |
711 | if (!bat_priv->bat_algo_ops->bat_neigh_print) { | |
712 | seq_puts(seq, | |
713 | "No printing function for this routing protocol\n"); | |
714 | return 0; | |
715 | } | |
716 | ||
717 | bat_priv->bat_algo_ops->bat_neigh_print(bat_priv, seq); | |
718 | return 0; | |
719 | } | |
720 | ||
7351a482 | 721 | /** |
2baa753c SE |
722 | * batadv_orig_ifinfo_release - release orig_ifinfo from lists and queue for |
723 | * free after rcu grace period | |
a6ba0d34 | 724 | * @ref: kref pointer of the orig_ifinfo |
7351a482 | 725 | */ |
a6ba0d34 | 726 | static void batadv_orig_ifinfo_release(struct kref *ref) |
7351a482 | 727 | { |
a6ba0d34 | 728 | struct batadv_orig_ifinfo *orig_ifinfo; |
000c8dff | 729 | struct batadv_neigh_node *router; |
7351a482 | 730 | |
a6ba0d34 SE |
731 | orig_ifinfo = container_of(ref, struct batadv_orig_ifinfo, refcount); |
732 | ||
7351a482 | 733 | if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) |
82047ad7 | 734 | batadv_hardif_put(orig_ifinfo->if_outgoing); |
7351a482 | 735 | |
000c8dff SW |
736 | /* this is the last reference to this object */ |
737 | router = rcu_dereference_protected(orig_ifinfo->router, true); | |
738 | if (router) | |
25bb2509 | 739 | batadv_neigh_node_put(router); |
2baa753c SE |
740 | |
741 | kfree_rcu(orig_ifinfo, rcu); | |
7351a482 SW |
742 | } |
743 | ||
744 | /** | |
35f94779 | 745 | * batadv_orig_ifinfo_put - decrement the refcounter and possibly release |
deed9660 | 746 | * the orig_ifinfo |
7351a482 SW |
747 | * @orig_ifinfo: the orig_ifinfo object to release |
748 | */ | |
35f94779 | 749 | void batadv_orig_ifinfo_put(struct batadv_orig_ifinfo *orig_ifinfo) |
7351a482 | 750 | { |
a6ba0d34 | 751 | kref_put(&orig_ifinfo->refcount, batadv_orig_ifinfo_release); |
7351a482 SW |
752 | } |
753 | ||
754 | /** | |
deed9660 SE |
755 | * batadv_orig_node_free_rcu - free the orig_node |
756 | * @rcu: rcu pointer of the orig_node | |
7351a482 | 757 | */ |
deed9660 | 758 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
7351a482 | 759 | { |
deed9660 SE |
760 | struct batadv_orig_node *orig_node; |
761 | ||
762 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); | |
763 | ||
764 | batadv_mcast_purge_orig(orig_node); | |
765 | ||
766 | batadv_frag_purge_orig(orig_node, NULL); | |
767 | ||
768 | if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) | |
769 | orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); | |
770 | ||
771 | kfree(orig_node->tt_buff); | |
772 | kfree(orig_node); | |
7351a482 SW |
773 | } |
774 | ||
deed9660 SE |
775 | /** |
776 | * batadv_orig_node_release - release orig_node from lists and queue for | |
777 | * free after rcu grace period | |
7c124391 | 778 | * @ref: kref pointer of the orig_node |
deed9660 | 779 | */ |
7c124391 | 780 | static void batadv_orig_node_release(struct kref *ref) |
c6c8fea2 | 781 | { |
b67bfe0d | 782 | struct hlist_node *node_tmp; |
f6c8b711 | 783 | struct batadv_neigh_node *neigh_node; |
7c124391 | 784 | struct batadv_orig_node *orig_node; |
7351a482 | 785 | struct batadv_orig_ifinfo *orig_ifinfo; |
16b1aba8 | 786 | |
7c124391 SE |
787 | orig_node = container_of(ref, struct batadv_orig_node, refcount); |
788 | ||
f987ed6e ML |
789 | spin_lock_bh(&orig_node->neigh_list_lock); |
790 | ||
c6c8fea2 | 791 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 792 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 793 | &orig_node->neigh_list, list) { |
f987ed6e | 794 | hlist_del_rcu(&neigh_node->list); |
25bb2509 | 795 | batadv_neigh_node_put(neigh_node); |
c6c8fea2 SE |
796 | } |
797 | ||
7351a482 SW |
798 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, |
799 | &orig_node->ifinfo_list, list) { | |
800 | hlist_del_rcu(&orig_ifinfo->list); | |
35f94779 | 801 | batadv_orig_ifinfo_put(orig_ifinfo); |
7351a482 | 802 | } |
f987ed6e ML |
803 | spin_unlock_bh(&orig_node->neigh_list_lock); |
804 | ||
d56b1705 MH |
805 | /* Free nc_nodes */ |
806 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
807 | ||
deed9660 | 808 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
c6c8fea2 SE |
809 | } |
810 | ||
72822225 | 811 | /** |
5d967310 | 812 | * batadv_orig_node_put - decrement the orig node refcounter and possibly |
deed9660 | 813 | * release it |
72822225 LL |
814 | * @orig_node: the orig node to free |
815 | */ | |
5d967310 | 816 | void batadv_orig_node_put(struct batadv_orig_node *orig_node) |
7b36e8ee | 817 | { |
7c124391 | 818 | kref_put(&orig_node->refcount, batadv_orig_node_release); |
7b36e8ee ML |
819 | } |
820 | ||
56303d34 | 821 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 822 | { |
5bf74e9c | 823 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 824 | struct hlist_node *node_tmp; |
16b1aba8 | 825 | struct hlist_head *head; |
16b1aba8 | 826 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 827 | struct batadv_orig_node *orig_node; |
6b5e971a | 828 | u32 i; |
16b1aba8 ML |
829 | |
830 | if (!hash) | |
c6c8fea2 SE |
831 | return; |
832 | ||
833 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
834 | ||
c6c8fea2 | 835 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
836 | |
837 | for (i = 0; i < hash->size; i++) { | |
838 | head = &hash->table[i]; | |
839 | list_lock = &hash->list_locks[i]; | |
840 | ||
841 | spin_lock_bh(list_lock); | |
b67bfe0d | 842 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 843 | head, hash_entry) { |
b67bfe0d | 844 | hlist_del_rcu(&orig_node->hash_entry); |
5d967310 | 845 | batadv_orig_node_put(orig_node); |
16b1aba8 ML |
846 | } |
847 | spin_unlock_bh(list_lock); | |
848 | } | |
849 | ||
1a8eaf07 | 850 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
851 | } |
852 | ||
bbad0a5e AQ |
853 | /** |
854 | * batadv_orig_node_new - creates a new orig_node | |
855 | * @bat_priv: the bat priv with all the soft interface information | |
856 | * @addr: the mac address of the originator | |
857 | * | |
858 | * Creates a new originator object and initialise all the generic fields. | |
859 | * The new object is not added to the originator list. | |
62fe710f SE |
860 | * |
861 | * Return: the newly created object or NULL on failure. | |
9cfc7bd6 | 862 | */ |
bbad0a5e | 863 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
6b5e971a | 864 | const u8 *addr) |
c6c8fea2 | 865 | { |
56303d34 | 866 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 867 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 868 | unsigned long reset_time; |
bbad0a5e | 869 | int i; |
c6c8fea2 | 870 | |
39c75a51 SE |
871 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
872 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 873 | |
704509b8 | 874 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
875 | if (!orig_node) |
876 | return NULL; | |
877 | ||
9591a79f | 878 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
d0fa4f3f | 879 | INIT_HLIST_HEAD(&orig_node->vlan_list); |
7351a482 | 880 | INIT_HLIST_HEAD(&orig_node->ifinfo_list); |
f3e0008f | 881 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 882 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 883 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 884 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 885 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 886 | |
d56b1705 MH |
887 | batadv_nc_init_orig(orig_node); |
888 | ||
7b36e8ee | 889 | /* extra reference for return */ |
7c124391 SE |
890 | kref_init(&orig_node->refcount); |
891 | kref_get(&orig_node->refcount); | |
c6c8fea2 | 892 | |
16b1aba8 | 893 | orig_node->bat_priv = bat_priv; |
8fdd0153 | 894 | ether_addr_copy(orig_node->orig, addr); |
785ea114 | 895 | batadv_dat_init_orig_node_addr(orig_node); |
c8c991bf | 896 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 897 | orig_node->tt_buff = NULL; |
a73105b8 | 898 | orig_node->tt_buff_len = 0; |
2c667a33 | 899 | orig_node->last_seen = jiffies; |
42d0b044 SE |
900 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
901 | orig_node->bcast_seqno_reset = reset_time; | |
8a4023c5 | 902 | |
60432d75 LL |
903 | #ifdef CONFIG_BATMAN_ADV_MCAST |
904 | orig_node->mcast_flags = BATADV_NO_FLAGS; | |
8a4023c5 LL |
905 | INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node); |
906 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node); | |
907 | INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node); | |
908 | spin_lock_init(&orig_node->mcast_handler_lock); | |
60432d75 | 909 | #endif |
c6c8fea2 | 910 | |
7ea7b4a1 AQ |
911 | /* create a vlan object for the "untagged" LAN */ |
912 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
913 | if (!vlan) | |
914 | goto free_orig_node; | |
915 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
916 | * Immediately release vlan since it is not needed anymore in this | |
917 | * context | |
918 | */ | |
21754e25 | 919 | batadv_orig_node_vlan_put(vlan); |
7ea7b4a1 | 920 | |
610bfc6b MH |
921 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
922 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
923 | spin_lock_init(&orig_node->fragments[i].lock); | |
924 | orig_node->fragments[i].size = 0; | |
925 | } | |
926 | ||
c6c8fea2 | 927 | return orig_node; |
c6c8fea2 SE |
928 | free_orig_node: |
929 | kfree(orig_node); | |
930 | return NULL; | |
931 | } | |
932 | ||
709de13f SW |
933 | /** |
934 | * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor | |
935 | * @bat_priv: the bat priv with all the soft interface information | |
936 | * @neigh: orig node which is to be checked | |
937 | */ | |
938 | static void | |
939 | batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, | |
940 | struct batadv_neigh_node *neigh) | |
941 | { | |
942 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
943 | struct batadv_hard_iface *if_outgoing; | |
944 | struct hlist_node *node_tmp; | |
945 | ||
946 | spin_lock_bh(&neigh->ifinfo_lock); | |
947 | ||
948 | /* for all ifinfo objects for this neighinator */ | |
949 | hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, | |
950 | &neigh->ifinfo_list, list) { | |
951 | if_outgoing = neigh_ifinfo->if_outgoing; | |
952 | ||
953 | /* always keep the default interface */ | |
954 | if (if_outgoing == BATADV_IF_DEFAULT) | |
955 | continue; | |
956 | ||
957 | /* don't purge if the interface is not (going) down */ | |
958 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
959 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
960 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
961 | continue; | |
962 | ||
963 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
964 | "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", | |
965 | neigh->addr, if_outgoing->net_dev->name); | |
966 | ||
967 | hlist_del_rcu(&neigh_ifinfo->list); | |
044fa3ae | 968 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
709de13f SW |
969 | } |
970 | ||
971 | spin_unlock_bh(&neigh->ifinfo_lock); | |
972 | } | |
973 | ||
7351a482 SW |
974 | /** |
975 | * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator | |
976 | * @bat_priv: the bat priv with all the soft interface information | |
977 | * @orig_node: orig node which is to be checked | |
978 | * | |
62fe710f | 979 | * Return: true if any ifinfo entry was purged, false otherwise. |
7351a482 SW |
980 | */ |
981 | static bool | |
982 | batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, | |
983 | struct batadv_orig_node *orig_node) | |
984 | { | |
985 | struct batadv_orig_ifinfo *orig_ifinfo; | |
986 | struct batadv_hard_iface *if_outgoing; | |
987 | struct hlist_node *node_tmp; | |
988 | bool ifinfo_purged = false; | |
989 | ||
990 | spin_lock_bh(&orig_node->neigh_list_lock); | |
991 | ||
992 | /* for all ifinfo objects for this originator */ | |
993 | hlist_for_each_entry_safe(orig_ifinfo, node_tmp, | |
994 | &orig_node->ifinfo_list, list) { | |
995 | if_outgoing = orig_ifinfo->if_outgoing; | |
996 | ||
997 | /* always keep the default interface */ | |
998 | if (if_outgoing == BATADV_IF_DEFAULT) | |
999 | continue; | |
1000 | ||
1001 | /* don't purge if the interface is not (going) down */ | |
1002 | if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && | |
1003 | (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && | |
1004 | (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) | |
1005 | continue; | |
1006 | ||
1007 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1008 | "router/ifinfo purge: originator %pM, iface: %s\n", | |
1009 | orig_node->orig, if_outgoing->net_dev->name); | |
1010 | ||
1011 | ifinfo_purged = true; | |
1012 | ||
1013 | hlist_del_rcu(&orig_ifinfo->list); | |
35f94779 | 1014 | batadv_orig_ifinfo_put(orig_ifinfo); |
f3b3d901 SW |
1015 | if (orig_node->last_bonding_candidate == orig_ifinfo) { |
1016 | orig_node->last_bonding_candidate = NULL; | |
35f94779 | 1017 | batadv_orig_ifinfo_put(orig_ifinfo); |
f3b3d901 | 1018 | } |
7351a482 SW |
1019 | } |
1020 | ||
1021 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
1022 | ||
1023 | return ifinfo_purged; | |
1024 | } | |
1025 | ||
89652331 SW |
1026 | /** |
1027 | * batadv_purge_orig_neighbors - purges neighbors from originator | |
1028 | * @bat_priv: the bat priv with all the soft interface information | |
1029 | * @orig_node: orig node which is to be checked | |
1030 | * | |
62fe710f | 1031 | * Return: true if any neighbor was purged, false otherwise |
89652331 | 1032 | */ |
56303d34 SE |
1033 | static bool |
1034 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
89652331 | 1035 | struct batadv_orig_node *orig_node) |
c6c8fea2 | 1036 | { |
b67bfe0d | 1037 | struct hlist_node *node_tmp; |
56303d34 | 1038 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 1039 | bool neigh_purged = false; |
0b0094e0 | 1040 | unsigned long last_seen; |
56303d34 | 1041 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 1042 | |
f987ed6e ML |
1043 | spin_lock_bh(&orig_node->neigh_list_lock); |
1044 | ||
c6c8fea2 | 1045 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 1046 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 1047 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1048 | last_seen = neigh_node->last_seen; |
1049 | if_incoming = neigh_node->if_incoming; | |
1050 | ||
42d0b044 | 1051 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
1052 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
1053 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1054 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
1055 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
1056 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
1057 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 1058 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1059 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
1060 | orig_node->orig, neigh_node->addr, | |
1061 | if_incoming->net_dev->name); | |
c6c8fea2 | 1062 | else |
39c75a51 | 1063 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1064 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
1065 | orig_node->orig, neigh_node->addr, | |
1066 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
1067 | |
1068 | neigh_purged = true; | |
9591a79f | 1069 | |
f987ed6e | 1070 | hlist_del_rcu(&neigh_node->list); |
25bb2509 | 1071 | batadv_neigh_node_put(neigh_node); |
709de13f SW |
1072 | } else { |
1073 | /* only necessary if not the whole neighbor is to be | |
1074 | * deleted, but some interface has been removed. | |
1075 | */ | |
1076 | batadv_purge_neigh_ifinfo(bat_priv, neigh_node); | |
c6c8fea2 SE |
1077 | } |
1078 | } | |
f987ed6e ML |
1079 | |
1080 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
1081 | return neigh_purged; |
1082 | } | |
1083 | ||
89652331 SW |
1084 | /** |
1085 | * batadv_find_best_neighbor - finds the best neighbor after purging | |
1086 | * @bat_priv: the bat priv with all the soft interface information | |
1087 | * @orig_node: orig node which is to be checked | |
1088 | * @if_outgoing: the interface for which the metric should be compared | |
1089 | * | |
62fe710f | 1090 | * Return: the current best neighbor, with refcount increased. |
89652331 SW |
1091 | */ |
1092 | static struct batadv_neigh_node * | |
1093 | batadv_find_best_neighbor(struct batadv_priv *bat_priv, | |
1094 | struct batadv_orig_node *orig_node, | |
1095 | struct batadv_hard_iface *if_outgoing) | |
1096 | { | |
1097 | struct batadv_neigh_node *best = NULL, *neigh; | |
1098 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
1099 | ||
1100 | rcu_read_lock(); | |
1101 | hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { | |
1102 | if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, | |
1103 | best, if_outgoing) <= 0)) | |
1104 | continue; | |
1105 | ||
77ae32e8 | 1106 | if (!kref_get_unless_zero(&neigh->refcount)) |
89652331 SW |
1107 | continue; |
1108 | ||
1109 | if (best) | |
25bb2509 | 1110 | batadv_neigh_node_put(best); |
89652331 SW |
1111 | |
1112 | best = neigh; | |
1113 | } | |
1114 | rcu_read_unlock(); | |
1115 | ||
1116 | return best; | |
1117 | } | |
1118 | ||
7351a482 SW |
1119 | /** |
1120 | * batadv_purge_orig_node - purges obsolete information from an orig_node | |
1121 | * @bat_priv: the bat priv with all the soft interface information | |
1122 | * @orig_node: orig node which is to be checked | |
1123 | * | |
1124 | * This function checks if the orig_node or substructures of it have become | |
1125 | * obsolete, and purges this information if that's the case. | |
1126 | * | |
62fe710f | 1127 | * Return: true if the orig_node is to be removed, false otherwise. |
7351a482 | 1128 | */ |
56303d34 SE |
1129 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
1130 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 1131 | { |
56303d34 | 1132 | struct batadv_neigh_node *best_neigh_node; |
7351a482 | 1133 | struct batadv_hard_iface *hard_iface; |
7b955a9f | 1134 | bool changed_ifinfo, changed_neigh; |
c6c8fea2 | 1135 | |
42d0b044 SE |
1136 | if (batadv_has_timed_out(orig_node->last_seen, |
1137 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 1138 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1139 | "Originator timeout: originator %pM, last_seen %u\n", |
1140 | orig_node->orig, | |
1141 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 | 1142 | return true; |
c6c8fea2 | 1143 | } |
7b955a9f SW |
1144 | changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); |
1145 | changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); | |
7351a482 | 1146 | |
7b955a9f | 1147 | if (!changed_ifinfo && !changed_neigh) |
89652331 SW |
1148 | return false; |
1149 | ||
7351a482 | 1150 | /* first for NULL ... */ |
89652331 SW |
1151 | best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, |
1152 | BATADV_IF_DEFAULT); | |
7351a482 SW |
1153 | batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, |
1154 | best_neigh_node); | |
89652331 | 1155 | if (best_neigh_node) |
25bb2509 | 1156 | batadv_neigh_node_put(best_neigh_node); |
c6c8fea2 | 1157 | |
7351a482 SW |
1158 | /* ... then for all other interfaces. */ |
1159 | rcu_read_lock(); | |
1160 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1161 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1162 | continue; | |
1163 | ||
1164 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1165 | continue; | |
1166 | ||
27353446 SE |
1167 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
1168 | continue; | |
1169 | ||
7351a482 SW |
1170 | best_neigh_node = batadv_find_best_neighbor(bat_priv, |
1171 | orig_node, | |
1172 | hard_iface); | |
1173 | batadv_update_route(bat_priv, orig_node, hard_iface, | |
1174 | best_neigh_node); | |
1175 | if (best_neigh_node) | |
25bb2509 | 1176 | batadv_neigh_node_put(best_neigh_node); |
27353446 SE |
1177 | |
1178 | batadv_hardif_put(hard_iface); | |
7351a482 SW |
1179 | } |
1180 | rcu_read_unlock(); | |
1181 | ||
c6c8fea2 SE |
1182 | return false; |
1183 | } | |
1184 | ||
56303d34 | 1185 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 1186 | { |
5bf74e9c | 1187 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 1188 | struct hlist_node *node_tmp; |
c6c8fea2 | 1189 | struct hlist_head *head; |
fb778ea1 | 1190 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 1191 | struct batadv_orig_node *orig_node; |
6b5e971a | 1192 | u32 i; |
c6c8fea2 SE |
1193 | |
1194 | if (!hash) | |
1195 | return; | |
1196 | ||
c6c8fea2 SE |
1197 | /* for all origins... */ |
1198 | for (i = 0; i < hash->size; i++) { | |
1199 | head = &hash->table[i]; | |
fb778ea1 | 1200 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1201 | |
fb778ea1 | 1202 | spin_lock_bh(list_lock); |
b67bfe0d | 1203 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 1204 | head, hash_entry) { |
03fc7f86 | 1205 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 1206 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 1207 | hlist_del_rcu(&orig_node->hash_entry); |
9d31b3ce LL |
1208 | batadv_tt_global_del_orig(orig_node->bat_priv, |
1209 | orig_node, -1, | |
1210 | "originator timed out"); | |
5d967310 | 1211 | batadv_orig_node_put(orig_node); |
fb778ea1 | 1212 | continue; |
c6c8fea2 | 1213 | } |
610bfc6b MH |
1214 | |
1215 | batadv_frag_purge_orig(orig_node, | |
1216 | batadv_frag_check_entry); | |
c6c8fea2 | 1217 | } |
fb778ea1 | 1218 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
1219 | } |
1220 | ||
7cf06bc6 | 1221 | batadv_gw_election(bat_priv); |
c6c8fea2 SE |
1222 | } |
1223 | ||
03fc7f86 | 1224 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 1225 | { |
56303d34 SE |
1226 | struct delayed_work *delayed_work; |
1227 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 1228 | |
4ba4bc0f | 1229 | delayed_work = to_delayed_work(work); |
56303d34 | 1230 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); |
03fc7f86 | 1231 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
1232 | queue_delayed_work(batadv_event_workqueue, |
1233 | &bat_priv->orig_work, | |
1234 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
1235 | } |
1236 | ||
56303d34 | 1237 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 1238 | { |
03fc7f86 | 1239 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
1240 | } |
1241 | ||
7d211efc | 1242 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1243 | { |
1244 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1245 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 1246 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 1247 | |
30da63a6 ML |
1248 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1249 | if (!primary_if) | |
737a2a22 | 1250 | return 0; |
c6c8fea2 | 1251 | |
737a2a22 | 1252 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 1253 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
1254 | primary_if->net_dev->dev_addr, net_dev->name, |
1255 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 1256 | |
82047ad7 | 1257 | batadv_hardif_put(primary_if); |
c6c8fea2 | 1258 | |
737a2a22 AQ |
1259 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
1260 | seq_puts(seq, | |
1261 | "No printing function for this routing protocol\n"); | |
1262 | return 0; | |
c6c8fea2 SE |
1263 | } |
1264 | ||
cb1c92ec SW |
1265 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, |
1266 | BATADV_IF_DEFAULT); | |
c6c8fea2 | 1267 | |
30da63a6 | 1268 | return 0; |
c6c8fea2 SE |
1269 | } |
1270 | ||
cb1c92ec SW |
1271 | /** |
1272 | * batadv_orig_hardif_seq_print_text - writes originator infos for a specific | |
1273 | * outgoing interface | |
1274 | * @seq: debugfs table seq_file struct | |
1275 | * @offset: not used | |
1276 | * | |
62fe710f | 1277 | * Return: 0 |
cb1c92ec SW |
1278 | */ |
1279 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) | |
1280 | { | |
1281 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1282 | struct batadv_hard_iface *hard_iface; | |
1283 | struct batadv_priv *bat_priv; | |
1284 | ||
1285 | hard_iface = batadv_hardif_get_by_netdev(net_dev); | |
1286 | ||
1287 | if (!hard_iface || !hard_iface->soft_iface) { | |
1288 | seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); | |
1289 | goto out; | |
1290 | } | |
1291 | ||
1292 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
1293 | if (!bat_priv->bat_algo_ops->bat_orig_print) { | |
1294 | seq_puts(seq, | |
1295 | "No printing function for this routing protocol\n"); | |
1296 | goto out; | |
1297 | } | |
1298 | ||
1299 | if (hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1300 | seq_puts(seq, "Interface not active\n"); | |
1301 | goto out; | |
1302 | } | |
1303 | ||
1304 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", | |
1305 | BATADV_SOURCE_VERSION, hard_iface->net_dev->name, | |
1306 | hard_iface->net_dev->dev_addr, | |
1307 | hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); | |
1308 | ||
1309 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); | |
1310 | ||
1311 | out: | |
16a41423 | 1312 | if (hard_iface) |
82047ad7 | 1313 | batadv_hardif_put(hard_iface); |
cb1c92ec SW |
1314 | return 0; |
1315 | } | |
1316 | ||
56303d34 SE |
1317 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
1318 | int max_if_num) | |
c6c8fea2 | 1319 | { |
56303d34 | 1320 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
d0015fdd | 1321 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
5bf74e9c | 1322 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1323 | struct hlist_head *head; |
56303d34 | 1324 | struct batadv_orig_node *orig_node; |
6b5e971a | 1325 | u32 i; |
c90681b8 | 1326 | int ret; |
c6c8fea2 SE |
1327 | |
1328 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1329 | * if_num |
1330 | */ | |
c6c8fea2 SE |
1331 | for (i = 0; i < hash->size; i++) { |
1332 | head = &hash->table[i]; | |
1333 | ||
fb778ea1 | 1334 | rcu_read_lock(); |
b67bfe0d | 1335 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1336 | ret = 0; |
1337 | if (bao->bat_orig_add_if) | |
1338 | ret = bao->bat_orig_add_if(orig_node, | |
1339 | max_if_num); | |
5346c35e | 1340 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1341 | goto err; |
1342 | } | |
fb778ea1 | 1343 | rcu_read_unlock(); |
c6c8fea2 SE |
1344 | } |
1345 | ||
c6c8fea2 SE |
1346 | return 0; |
1347 | ||
1348 | err: | |
fb778ea1 | 1349 | rcu_read_unlock(); |
c6c8fea2 SE |
1350 | return -ENOMEM; |
1351 | } | |
1352 | ||
56303d34 SE |
1353 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
1354 | int max_if_num) | |
c6c8fea2 | 1355 | { |
56303d34 | 1356 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 1357 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 1358 | struct hlist_head *head; |
56303d34 SE |
1359 | struct batadv_hard_iface *hard_iface_tmp; |
1360 | struct batadv_orig_node *orig_node; | |
d0015fdd | 1361 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
6b5e971a | 1362 | u32 i; |
c90681b8 | 1363 | int ret; |
c6c8fea2 SE |
1364 | |
1365 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
1366 | * if_num |
1367 | */ | |
c6c8fea2 SE |
1368 | for (i = 0; i < hash->size; i++) { |
1369 | head = &hash->table[i]; | |
1370 | ||
fb778ea1 | 1371 | rcu_read_lock(); |
b67bfe0d | 1372 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
d0015fdd AQ |
1373 | ret = 0; |
1374 | if (bao->bat_orig_del_if) | |
1375 | ret = bao->bat_orig_del_if(orig_node, | |
1376 | max_if_num, | |
1377 | hard_iface->if_num); | |
5346c35e | 1378 | if (ret == -ENOMEM) |
c6c8fea2 SE |
1379 | goto err; |
1380 | } | |
fb778ea1 | 1381 | rcu_read_unlock(); |
c6c8fea2 SE |
1382 | } |
1383 | ||
1384 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
1385 | rcu_read_lock(); | |
3193e8fd | 1386 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 1387 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
1388 | continue; |
1389 | ||
e6c10f43 | 1390 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
1391 | continue; |
1392 | ||
e6c10f43 | 1393 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
1394 | continue; |
1395 | ||
e6c10f43 ML |
1396 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
1397 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
1398 | } |
1399 | rcu_read_unlock(); | |
1400 | ||
e6c10f43 | 1401 | hard_iface->if_num = -1; |
c6c8fea2 SE |
1402 | return 0; |
1403 | ||
1404 | err: | |
fb778ea1 | 1405 | rcu_read_unlock(); |
c6c8fea2 SE |
1406 | return -ENOMEM; |
1407 | } |