aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/staging/batman-adv/originator.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/staging/batman-adv/originator.c')
-rw-r--r--drivers/staging/batman-adv/originator.c533
1 files changed, 0 insertions, 533 deletions
diff --git a/drivers/staging/batman-adv/originator.c b/drivers/staging/batman-adv/originator.c
deleted file mode 100644
index 55270080a44..00000000000
--- a/drivers/staging/batman-adv/originator.c
+++ /dev/null
@@ -1,533 +0,0 @@
1/*
2 * Copyright (C) 2009-2010 B.A.T.M.A.N. contributors:
3 *
4 * Marek Lindner, Simon Wunderlich
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA
19 *
20 */
21
22/* increase the reference counter for this originator */
23
24#include "main.h"
25#include "originator.h"
26#include "hash.h"
27#include "translation-table.h"
28#include "routing.h"
29#include "hard-interface.h"
30#include "unicast.h"
31
32static void purge_orig(struct work_struct *work);
33
34static void start_purge_timer(struct bat_priv *bat_priv)
35{
36 INIT_DELAYED_WORK(&bat_priv->orig_work, purge_orig);
37 queue_delayed_work(bat_event_workqueue, &bat_priv->orig_work, 1 * HZ);
38}
39
40int originator_init(struct bat_priv *bat_priv)
41{
42 unsigned long flags;
43 if (bat_priv->orig_hash)
44 return 1;
45
46 spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
47 bat_priv->orig_hash = hash_new(128, compare_orig, choose_orig);
48
49 if (!bat_priv->orig_hash)
50 goto err;
51
52 spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
53 start_purge_timer(bat_priv);
54 return 1;
55
56err:
57 spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
58 return 0;
59}
60
61struct neigh_node *
62create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node,
63 uint8_t *neigh, struct batman_if *if_incoming)
64{
65 struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
66 struct neigh_node *neigh_node;
67
68 bat_dbg(DBG_BATMAN, bat_priv,
69 "Creating new last-hop neighbor of originator\n");
70
71 neigh_node = kzalloc(sizeof(struct neigh_node), GFP_ATOMIC);
72 if (!neigh_node)
73 return NULL;
74
75 INIT_LIST_HEAD(&neigh_node->list);
76
77 memcpy(neigh_node->addr, neigh, ETH_ALEN);
78 neigh_node->orig_node = orig_neigh_node;
79 neigh_node->if_incoming = if_incoming;
80
81 list_add_tail(&neigh_node->list, &orig_node->neigh_list);
82 return neigh_node;
83}
84
85static void free_orig_node(void *data, void *arg)
86{
87 struct list_head *list_pos, *list_pos_tmp;
88 struct neigh_node *neigh_node;
89 struct orig_node *orig_node = (struct orig_node *)data;
90 struct bat_priv *bat_priv = (struct bat_priv *)arg;
91
92 /* for all neighbors towards this originator ... */
93 list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
94 neigh_node = list_entry(list_pos, struct neigh_node, list);
95
96 list_del(list_pos);
97 kfree(neigh_node);
98 }
99
100 frag_list_free(&orig_node->frag_list);
101 hna_global_del_orig(bat_priv, orig_node, "originator timed out");
102
103 kfree(orig_node->bcast_own);
104 kfree(orig_node->bcast_own_sum);
105 kfree(orig_node);
106}
107
108void originator_free(struct bat_priv *bat_priv)
109{
110 unsigned long flags;
111
112 if (!bat_priv->orig_hash)
113 return;
114
115 cancel_delayed_work_sync(&bat_priv->orig_work);
116
117 spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
118 hash_delete(bat_priv->orig_hash, free_orig_node, bat_priv);
119 bat_priv->orig_hash = NULL;
120 spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
121}
122
123/* this function finds or creates an originator entry for the given
124 * address if it does not exits */
125struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr)
126{
127 struct orig_node *orig_node;
128 struct hashtable_t *swaphash;
129 int size;
130
131 orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash, addr));
132
133 if (orig_node)
134 return orig_node;
135
136 bat_dbg(DBG_BATMAN, bat_priv,
137 "Creating new originator: %pM\n", addr);
138
139 orig_node = kzalloc(sizeof(struct orig_node), GFP_ATOMIC);
140 if (!orig_node)
141 return NULL;
142
143 INIT_LIST_HEAD(&orig_node->neigh_list);
144
145 memcpy(orig_node->orig, addr, ETH_ALEN);
146 orig_node->router = NULL;
147 orig_node->hna_buff = NULL;
148 orig_node->bcast_seqno_reset = jiffies - 1
149 - msecs_to_jiffies(RESET_PROTECTION_MS);
150 orig_node->batman_seqno_reset = jiffies - 1
151 - msecs_to_jiffies(RESET_PROTECTION_MS);
152
153 size = bat_priv->num_ifaces * sizeof(TYPE_OF_WORD) * NUM_WORDS;
154
155 orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
156 if (!orig_node->bcast_own)
157 goto free_orig_node;
158
159 size = bat_priv->num_ifaces * sizeof(uint8_t);
160 orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);
161
162 INIT_LIST_HEAD(&orig_node->frag_list);
163 orig_node->last_frag_packet = 0;
164
165 if (!orig_node->bcast_own_sum)
166 goto free_bcast_own;
167
168 if (hash_add(bat_priv->orig_hash, orig_node) < 0)
169 goto free_bcast_own_sum;
170
171 if (bat_priv->orig_hash->elements * 4 > bat_priv->orig_hash->size) {
172 swaphash = hash_resize(bat_priv->orig_hash,
173 bat_priv->orig_hash->size * 2);
174
175 if (!swaphash)
176 bat_dbg(DBG_BATMAN, bat_priv,
177 "Couldn't resize orig hash table\n");
178 else
179 bat_priv->orig_hash = swaphash;
180 }
181
182 return orig_node;
183free_bcast_own_sum:
184 kfree(orig_node->bcast_own_sum);
185free_bcast_own:
186 kfree(orig_node->bcast_own);
187free_orig_node:
188 kfree(orig_node);
189 return NULL;
190}
191
192static bool purge_orig_neighbors(struct bat_priv *bat_priv,
193 struct orig_node *orig_node,
194 struct neigh_node **best_neigh_node)
195{
196 struct list_head *list_pos, *list_pos_tmp;
197 struct neigh_node *neigh_node;
198 bool neigh_purged = false;
199
200 *best_neigh_node = NULL;
201
202 /* for all neighbors towards this originator ... */
203 list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
204 neigh_node = list_entry(list_pos, struct neigh_node, list);
205
206 if ((time_after(jiffies,
207 neigh_node->last_valid + PURGE_TIMEOUT * HZ)) ||
208 (neigh_node->if_incoming->if_status == IF_INACTIVE) ||
209 (neigh_node->if_incoming->if_status == IF_TO_BE_REMOVED)) {
210
211 if (neigh_node->if_incoming->if_status ==
212 IF_TO_BE_REMOVED)
213 bat_dbg(DBG_BATMAN, bat_priv,
214 "neighbor purge: originator %pM, "
215 "neighbor: %pM, iface: %s\n",
216 orig_node->orig, neigh_node->addr,
217 neigh_node->if_incoming->net_dev->name);
218 else
219 bat_dbg(DBG_BATMAN, bat_priv,
220 "neighbor timeout: originator %pM, "
221 "neighbor: %pM, last_valid: %lu\n",
222 orig_node->orig, neigh_node->addr,
223 (neigh_node->last_valid / HZ));
224
225 neigh_purged = true;
226 list_del(list_pos);
227 kfree(neigh_node);
228 } else {
229 if ((*best_neigh_node == NULL) ||
230 (neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
231 *best_neigh_node = neigh_node;
232 }
233 }
234 return neigh_purged;
235}
236
237static bool purge_orig_node(struct bat_priv *bat_priv,
238 struct orig_node *orig_node)
239{
240 struct neigh_node *best_neigh_node;
241
242 if (time_after(jiffies,
243 orig_node->last_valid + 2 * PURGE_TIMEOUT * HZ)) {
244
245 bat_dbg(DBG_BATMAN, bat_priv,
246 "Originator timeout: originator %pM, last_valid %lu\n",
247 orig_node->orig, (orig_node->last_valid / HZ));
248 return true;
249 } else {
250 if (purge_orig_neighbors(bat_priv, orig_node,
251 &best_neigh_node)) {
252 update_routes(bat_priv, orig_node,
253 best_neigh_node,
254 orig_node->hna_buff,
255 orig_node->hna_buff_len);
256 /* update bonding candidates, we could have lost
257 * some candidates. */
258 update_bonding_candidates(bat_priv, orig_node);
259 }
260 }
261
262 return false;
263}
264
265static void _purge_orig(struct bat_priv *bat_priv)
266{
267 HASHIT(hashit);
268 struct orig_node *orig_node;
269 unsigned long flags;
270
271 spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
272
273 /* for all origins... */
274 while (hash_iterate(bat_priv->orig_hash, &hashit)) {
275 orig_node = hashit.bucket->data;
276
277 if (purge_orig_node(bat_priv, orig_node)) {
278 hash_remove_bucket(bat_priv->orig_hash, &hashit);
279 free_orig_node(orig_node, bat_priv);
280 }
281
282 if (time_after(jiffies, (orig_node->last_frag_packet +
283 msecs_to_jiffies(FRAG_TIMEOUT))))
284 frag_list_free(&orig_node->frag_list);
285 }
286
287 spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
288
289}
290
291static void purge_orig(struct work_struct *work)
292{
293 struct delayed_work *delayed_work =
294 container_of(work, struct delayed_work, work);
295 struct bat_priv *bat_priv =
296 container_of(delayed_work, struct bat_priv, orig_work);
297
298 _purge_orig(bat_priv);
299 start_purge_timer(bat_priv);
300}
301
302void purge_orig_ref(struct bat_priv *bat_priv)
303{
304 _purge_orig(bat_priv);
305}
306
307int orig_seq_print_text(struct seq_file *seq, void *offset)
308{
309 HASHIT(hashit);
310 struct net_device *net_dev = (struct net_device *)seq->private;
311 struct bat_priv *bat_priv = netdev_priv(net_dev);
312 struct orig_node *orig_node;
313 struct neigh_node *neigh_node;
314 int batman_count = 0;
315 int last_seen_secs;
316 int last_seen_msecs;
317 unsigned long flags;
318
319 if ((!bat_priv->primary_if) ||
320 (bat_priv->primary_if->if_status != IF_ACTIVE)) {
321 if (!bat_priv->primary_if)
322 return seq_printf(seq, "BATMAN mesh %s disabled - "
323 "please specify interfaces to enable it\n",
324 net_dev->name);
325
326 return seq_printf(seq, "BATMAN mesh %s "
327 "disabled - primary interface not active\n",
328 net_dev->name);
329 }
330
331 seq_printf(seq, "[B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%pM (%s)]\n",
332 SOURCE_VERSION, REVISION_VERSION_STR,
333 bat_priv->primary_if->net_dev->name,
334 bat_priv->primary_if->net_dev->dev_addr, net_dev->name);
335 seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
336 "Originator", "last-seen", "#", TQ_MAX_VALUE, "Nexthop",
337 "outgoingIF", "Potential nexthops");
338
339 spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
340
341 while (hash_iterate(bat_priv->orig_hash, &hashit)) {
342
343 orig_node = hashit.bucket->data;
344
345 if (!orig_node->router)
346 continue;
347
348 if (orig_node->router->tq_avg == 0)
349 continue;
350
351 last_seen_secs = jiffies_to_msecs(jiffies -
352 orig_node->last_valid) / 1000;
353 last_seen_msecs = jiffies_to_msecs(jiffies -
354 orig_node->last_valid) % 1000;
355
356 seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:",
357 orig_node->orig, last_seen_secs, last_seen_msecs,
358 orig_node->router->tq_avg, orig_node->router->addr,
359 orig_node->router->if_incoming->net_dev->name);
360
361 list_for_each_entry(neigh_node, &orig_node->neigh_list, list) {
362 seq_printf(seq, " %pM (%3i)", neigh_node->addr,
363 neigh_node->tq_avg);
364 }
365
366 seq_printf(seq, "\n");
367 batman_count++;
368 }
369
370 spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
371
372 if ((batman_count == 0))
373 seq_printf(seq, "No batman nodes in range ...\n");
374
375 return 0;
376}
377
378static int orig_node_add_if(struct orig_node *orig_node, int max_if_num)
379{
380 void *data_ptr;
381
382 data_ptr = kmalloc(max_if_num * sizeof(TYPE_OF_WORD) * NUM_WORDS,
383 GFP_ATOMIC);
384 if (!data_ptr) {
385 pr_err("Can't resize orig: out of memory\n");
386 return -1;
387 }
388
389 memcpy(data_ptr, orig_node->bcast_own,
390 (max_if_num - 1) * sizeof(TYPE_OF_WORD) * NUM_WORDS);
391 kfree(orig_node->bcast_own);
392 orig_node->bcast_own = data_ptr;
393
394 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
395 if (!data_ptr) {
396 pr_err("Can't resize orig: out of memory\n");
397 return -1;
398 }
399
400 memcpy(data_ptr, orig_node->bcast_own_sum,
401 (max_if_num - 1) * sizeof(uint8_t));
402 kfree(orig_node->bcast_own_sum);
403 orig_node->bcast_own_sum = data_ptr;
404
405 return 0;
406}
407
408int orig_hash_add_if(struct batman_if *batman_if, int max_if_num)
409{
410 struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
411 struct orig_node *orig_node;
412 unsigned long flags;
413 HASHIT(hashit);
414
415 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
416 * if_num */
417 spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
418
419 while (hash_iterate(bat_priv->orig_hash, &hashit)) {
420 orig_node = hashit.bucket->data;
421
422 if (orig_node_add_if(orig_node, max_if_num) == -1)
423 goto err;
424 }
425
426 spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
427 return 0;
428
429err:
430 spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
431 return -ENOMEM;
432}
433
434static int orig_node_del_if(struct orig_node *orig_node,
435 int max_if_num, int del_if_num)
436{
437 void *data_ptr = NULL;
438 int chunk_size;
439
440 /* last interface was removed */
441 if (max_if_num == 0)
442 goto free_bcast_own;
443
444 chunk_size = sizeof(TYPE_OF_WORD) * NUM_WORDS;
445 data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
446 if (!data_ptr) {
447 pr_err("Can't resize orig: out of memory\n");
448 return -1;
449 }
450
451 /* copy first part */
452 memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);
453
454 /* copy second part */
455 memcpy(data_ptr + del_if_num * chunk_size,
456 orig_node->bcast_own + ((del_if_num + 1) * chunk_size),
457 (max_if_num - del_if_num) * chunk_size);
458
459free_bcast_own:
460 kfree(orig_node->bcast_own);
461 orig_node->bcast_own = data_ptr;
462
463 if (max_if_num == 0)
464 goto free_own_sum;
465
466 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
467 if (!data_ptr) {
468 pr_err("Can't resize orig: out of memory\n");
469 return -1;
470 }
471
472 memcpy(data_ptr, orig_node->bcast_own_sum,
473 del_if_num * sizeof(uint8_t));
474
475 memcpy(data_ptr + del_if_num * sizeof(uint8_t),
476 orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)),
477 (max_if_num - del_if_num) * sizeof(uint8_t));
478
479free_own_sum:
480 kfree(orig_node->bcast_own_sum);
481 orig_node->bcast_own_sum = data_ptr;
482
483 return 0;
484}
485
486int orig_hash_del_if(struct batman_if *batman_if, int max_if_num)
487{
488 struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
489 struct batman_if *batman_if_tmp;
490 struct orig_node *orig_node;
491 unsigned long flags;
492 HASHIT(hashit);
493 int ret;
494
495 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
496 * if_num */
497 spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
498
499 while (hash_iterate(bat_priv->orig_hash, &hashit)) {
500 orig_node = hashit.bucket->data;
501
502 ret = orig_node_del_if(orig_node, max_if_num,
503 batman_if->if_num);
504
505 if (ret == -1)
506 goto err;
507 }
508
509 /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
510 rcu_read_lock();
511 list_for_each_entry_rcu(batman_if_tmp, &if_list, list) {
512 if (batman_if_tmp->if_status == IF_NOT_IN_USE)
513 continue;
514
515 if (batman_if == batman_if_tmp)
516 continue;
517
518 if (batman_if->soft_iface != batman_if_tmp->soft_iface)
519 continue;
520
521 if (batman_if_tmp->if_num > batman_if->if_num)
522 batman_if_tmp->if_num--;
523 }
524 rcu_read_unlock();
525
526 batman_if->if_num = -1;
527 spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
528 return 0;
529
530err:
531 spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
532 return -ENOMEM;
533}
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-21 15:04:49 -0400