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0b873931 | 1 | /* Copyright (C) 2009-2013 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 | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
c6c8fea2 | 20 | #include "main.h" |
785ea114 | 21 | #include "distributed-arp-table.h" |
c6c8fea2 SE |
22 | #include "originator.h" |
23 | #include "hash.h" | |
24 | #include "translation-table.h" | |
25 | #include "routing.h" | |
26 | #include "gateway_client.h" | |
27 | #include "hard-interface.h" | |
c6c8fea2 | 28 | #include "soft-interface.h" |
23721387 | 29 | #include "bridge_loop_avoidance.h" |
d56b1705 | 30 | #include "network-coding.h" |
610bfc6b | 31 | #include "fragmentation.h" |
c6c8fea2 | 32 | |
dec05074 AQ |
33 | /* hash class keys */ |
34 | static struct lock_class_key batadv_orig_hash_lock_class_key; | |
35 | ||
03fc7f86 | 36 | static void batadv_purge_orig(struct work_struct *work); |
c6c8fea2 | 37 | |
b8e2dd13 | 38 | /* returns 1 if they are the same originator */ |
bbad0a5e | 39 | int batadv_compare_orig(const struct hlist_node *node, const void *data2) |
b8e2dd13 | 40 | { |
56303d34 SE |
41 | const void *data1 = container_of(node, struct batadv_orig_node, |
42 | hash_entry); | |
b8e2dd13 SE |
43 | |
44 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
45 | } | |
46 | ||
7ea7b4a1 AQ |
47 | /** |
48 | * batadv_orig_node_vlan_get - get an orig_node_vlan object | |
49 | * @orig_node: the originator serving the VLAN | |
50 | * @vid: the VLAN identifier | |
51 | * | |
52 | * Returns the vlan object identified by vid and belonging to orig_node or NULL | |
53 | * if it does not exist. | |
54 | */ | |
55 | struct batadv_orig_node_vlan * | |
56 | batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, | |
57 | unsigned short vid) | |
58 | { | |
59 | struct batadv_orig_node_vlan *vlan = NULL, *tmp; | |
60 | ||
61 | rcu_read_lock(); | |
62 | list_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) { | |
63 | if (tmp->vid != vid) | |
64 | continue; | |
65 | ||
66 | if (!atomic_inc_not_zero(&tmp->refcount)) | |
67 | continue; | |
68 | ||
69 | vlan = tmp; | |
70 | ||
71 | break; | |
72 | } | |
73 | rcu_read_unlock(); | |
74 | ||
75 | return vlan; | |
76 | } | |
77 | ||
78 | /** | |
79 | * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan | |
80 | * object | |
81 | * @orig_node: the originator serving the VLAN | |
82 | * @vid: the VLAN identifier | |
83 | * | |
84 | * Returns NULL in case of failure or the vlan object identified by vid and | |
85 | * belonging to orig_node otherwise. The object is created and added to the list | |
86 | * if it does not exist. | |
87 | * | |
88 | * The object is returned with refcounter increased by 1. | |
89 | */ | |
90 | struct batadv_orig_node_vlan * | |
91 | batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, | |
92 | unsigned short vid) | |
93 | { | |
94 | struct batadv_orig_node_vlan *vlan; | |
95 | ||
96 | spin_lock_bh(&orig_node->vlan_list_lock); | |
97 | ||
98 | /* first look if an object for this vid already exists */ | |
99 | vlan = batadv_orig_node_vlan_get(orig_node, vid); | |
100 | if (vlan) | |
101 | goto out; | |
102 | ||
103 | vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); | |
104 | if (!vlan) | |
105 | goto out; | |
106 | ||
107 | atomic_set(&vlan->refcount, 2); | |
108 | vlan->vid = vid; | |
109 | ||
110 | list_add_rcu(&vlan->list, &orig_node->vlan_list); | |
111 | ||
112 | out: | |
113 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
114 | ||
115 | return vlan; | |
116 | } | |
117 | ||
118 | /** | |
119 | * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free | |
120 | * the originator-vlan object | |
121 | * @orig_vlan: the originator-vlan object to release | |
122 | */ | |
123 | void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan) | |
124 | { | |
125 | if (atomic_dec_and_test(&orig_vlan->refcount)) | |
126 | kfree_rcu(orig_vlan, rcu); | |
127 | } | |
128 | ||
56303d34 | 129 | int batadv_originator_init(struct batadv_priv *bat_priv) |
c6c8fea2 SE |
130 | { |
131 | if (bat_priv->orig_hash) | |
5346c35e | 132 | return 0; |
c6c8fea2 | 133 | |
1a8eaf07 | 134 | bat_priv->orig_hash = batadv_hash_new(1024); |
c6c8fea2 SE |
135 | |
136 | if (!bat_priv->orig_hash) | |
137 | goto err; | |
138 | ||
dec05074 AQ |
139 | batadv_hash_set_lock_class(bat_priv->orig_hash, |
140 | &batadv_orig_hash_lock_class_key); | |
141 | ||
72414442 AQ |
142 | INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig); |
143 | queue_delayed_work(batadv_event_workqueue, | |
144 | &bat_priv->orig_work, | |
145 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
146 | ||
5346c35e | 147 | return 0; |
c6c8fea2 SE |
148 | |
149 | err: | |
5346c35e | 150 | return -ENOMEM; |
c6c8fea2 SE |
151 | } |
152 | ||
56303d34 | 153 | void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) |
a4c135c5 | 154 | { |
44524fcd | 155 | if (atomic_dec_and_test(&neigh_node->refcount)) |
ae179ae4 | 156 | kfree_rcu(neigh_node, rcu); |
a4c135c5 SW |
157 | } |
158 | ||
e1a5382f | 159 | /* increases the refcounter of a found router */ |
56303d34 SE |
160 | struct batadv_neigh_node * |
161 | batadv_orig_node_get_router(struct batadv_orig_node *orig_node) | |
e1a5382f | 162 | { |
56303d34 | 163 | struct batadv_neigh_node *router; |
e1a5382f LL |
164 | |
165 | rcu_read_lock(); | |
166 | router = rcu_dereference(orig_node->router); | |
167 | ||
168 | if (router && !atomic_inc_not_zero(&router->refcount)) | |
169 | router = NULL; | |
170 | ||
171 | rcu_read_unlock(); | |
172 | return router; | |
173 | } | |
174 | ||
0538f759 AQ |
175 | /** |
176 | * batadv_neigh_node_new - create and init a new neigh_node object | |
177 | * @hard_iface: the interface where the neighbour is connected to | |
178 | * @neigh_addr: the mac address of the neighbour interface | |
179 | * @orig_node: originator object representing the neighbour | |
180 | * | |
181 | * Allocates a new neigh_node object and initialises all the generic fields. | |
182 | * Returns the new object or NULL on failure. | |
183 | */ | |
56303d34 SE |
184 | struct batadv_neigh_node * |
185 | batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, | |
0538f759 AQ |
186 | const uint8_t *neigh_addr, |
187 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 188 | { |
56303d34 | 189 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 190 | |
704509b8 | 191 | neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); |
c6c8fea2 | 192 | if (!neigh_node) |
7ae8b285 | 193 | goto out; |
c6c8fea2 | 194 | |
9591a79f | 195 | INIT_HLIST_NODE(&neigh_node->list); |
c6c8fea2 | 196 | |
7ae8b285 | 197 | memcpy(neigh_node->addr, neigh_addr, ETH_ALEN); |
0538f759 AQ |
198 | neigh_node->if_incoming = hard_iface; |
199 | neigh_node->orig_node = orig_node; | |
200 | ||
201 | INIT_LIST_HEAD(&neigh_node->bonding_list); | |
1605d0d6 ML |
202 | |
203 | /* extra reference for return */ | |
204 | atomic_set(&neigh_node->refcount, 2); | |
c6c8fea2 | 205 | |
7ae8b285 | 206 | out: |
c6c8fea2 SE |
207 | return neigh_node; |
208 | } | |
209 | ||
03fc7f86 | 210 | static void batadv_orig_node_free_rcu(struct rcu_head *rcu) |
c6c8fea2 | 211 | { |
b67bfe0d | 212 | struct hlist_node *node_tmp; |
56303d34 SE |
213 | struct batadv_neigh_node *neigh_node, *tmp_neigh_node; |
214 | struct batadv_orig_node *orig_node; | |
16b1aba8 | 215 | |
56303d34 | 216 | orig_node = container_of(rcu, struct batadv_orig_node, rcu); |
c6c8fea2 | 217 | |
f987ed6e ML |
218 | spin_lock_bh(&orig_node->neigh_list_lock); |
219 | ||
a4c135c5 SW |
220 | /* for all bonding members ... */ |
221 | list_for_each_entry_safe(neigh_node, tmp_neigh_node, | |
222 | &orig_node->bond_list, bonding_list) { | |
223 | list_del_rcu(&neigh_node->bonding_list); | |
7d211efc | 224 | batadv_neigh_node_free_ref(neigh_node); |
a4c135c5 SW |
225 | } |
226 | ||
c6c8fea2 | 227 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 228 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 229 | &orig_node->neigh_list, list) { |
f987ed6e | 230 | hlist_del_rcu(&neigh_node->list); |
7d211efc | 231 | batadv_neigh_node_free_ref(neigh_node); |
c6c8fea2 SE |
232 | } |
233 | ||
f987ed6e ML |
234 | spin_unlock_bh(&orig_node->neigh_list_lock); |
235 | ||
d56b1705 MH |
236 | /* Free nc_nodes */ |
237 | batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); | |
238 | ||
610bfc6b MH |
239 | batadv_frag_purge_orig(orig_node, NULL); |
240 | ||
95fb130d | 241 | batadv_tt_global_del_orig(orig_node->bat_priv, orig_node, -1, |
08c36d3e | 242 | "originator timed out"); |
c6c8fea2 | 243 | |
a73105b8 | 244 | kfree(orig_node->tt_buff); |
bbad0a5e AQ |
245 | kfree(orig_node->bat_iv.bcast_own); |
246 | kfree(orig_node->bat_iv.bcast_own_sum); | |
c6c8fea2 SE |
247 | kfree(orig_node); |
248 | } | |
249 | ||
72822225 LL |
250 | /** |
251 | * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly | |
252 | * schedule an rcu callback for freeing it | |
253 | * @orig_node: the orig node to free | |
254 | */ | |
56303d34 | 255 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) |
7b36e8ee ML |
256 | { |
257 | if (atomic_dec_and_test(&orig_node->refcount)) | |
03fc7f86 | 258 | call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); |
7b36e8ee ML |
259 | } |
260 | ||
72822225 LL |
261 | /** |
262 | * batadv_orig_node_free_ref_now - decrement the orig node refcounter and | |
263 | * possibly free it (without rcu callback) | |
264 | * @orig_node: the orig node to free | |
265 | */ | |
266 | void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node) | |
267 | { | |
268 | if (atomic_dec_and_test(&orig_node->refcount)) | |
269 | batadv_orig_node_free_rcu(&orig_node->rcu); | |
270 | } | |
271 | ||
56303d34 | 272 | void batadv_originator_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 273 | { |
5bf74e9c | 274 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 275 | struct hlist_node *node_tmp; |
16b1aba8 | 276 | struct hlist_head *head; |
16b1aba8 | 277 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 278 | struct batadv_orig_node *orig_node; |
c90681b8 | 279 | uint32_t i; |
16b1aba8 ML |
280 | |
281 | if (!hash) | |
c6c8fea2 SE |
282 | return; |
283 | ||
284 | cancel_delayed_work_sync(&bat_priv->orig_work); | |
285 | ||
c6c8fea2 | 286 | bat_priv->orig_hash = NULL; |
16b1aba8 ML |
287 | |
288 | for (i = 0; i < hash->size; i++) { | |
289 | head = &hash->table[i]; | |
290 | list_lock = &hash->list_locks[i]; | |
291 | ||
292 | spin_lock_bh(list_lock); | |
b67bfe0d | 293 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 294 | head, hash_entry) { |
b67bfe0d | 295 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 296 | batadv_orig_node_free_ref(orig_node); |
16b1aba8 ML |
297 | } |
298 | spin_unlock_bh(list_lock); | |
299 | } | |
300 | ||
1a8eaf07 | 301 | batadv_hash_destroy(hash); |
c6c8fea2 SE |
302 | } |
303 | ||
bbad0a5e AQ |
304 | /** |
305 | * batadv_orig_node_new - creates a new orig_node | |
306 | * @bat_priv: the bat priv with all the soft interface information | |
307 | * @addr: the mac address of the originator | |
308 | * | |
309 | * Creates a new originator object and initialise all the generic fields. | |
310 | * The new object is not added to the originator list. | |
311 | * Returns the newly created object or NULL on failure. | |
9cfc7bd6 | 312 | */ |
bbad0a5e | 313 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
56303d34 | 314 | const uint8_t *addr) |
c6c8fea2 | 315 | { |
56303d34 | 316 | struct batadv_orig_node *orig_node; |
7ea7b4a1 | 317 | struct batadv_orig_node_vlan *vlan; |
42d0b044 | 318 | unsigned long reset_time; |
bbad0a5e | 319 | int i; |
c6c8fea2 | 320 | |
39c75a51 SE |
321 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
322 | "Creating new originator: %pM\n", addr); | |
c6c8fea2 | 323 | |
704509b8 | 324 | orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC); |
c6c8fea2 SE |
325 | if (!orig_node) |
326 | return NULL; | |
327 | ||
9591a79f | 328 | INIT_HLIST_HEAD(&orig_node->neigh_list); |
a4c135c5 | 329 | INIT_LIST_HEAD(&orig_node->bond_list); |
7ea7b4a1 | 330 | INIT_LIST_HEAD(&orig_node->vlan_list); |
f3e0008f | 331 | spin_lock_init(&orig_node->bcast_seqno_lock); |
f987ed6e | 332 | spin_lock_init(&orig_node->neigh_list_lock); |
a73105b8 | 333 | spin_lock_init(&orig_node->tt_buff_lock); |
a70a9aa9 | 334 | spin_lock_init(&orig_node->tt_lock); |
7ea7b4a1 | 335 | spin_lock_init(&orig_node->vlan_list_lock); |
7b36e8ee | 336 | |
d56b1705 MH |
337 | batadv_nc_init_orig(orig_node); |
338 | ||
7b36e8ee ML |
339 | /* extra reference for return */ |
340 | atomic_set(&orig_node->refcount, 2); | |
c6c8fea2 | 341 | |
17071578 | 342 | orig_node->tt_initialised = false; |
16b1aba8 | 343 | orig_node->bat_priv = bat_priv; |
c6c8fea2 | 344 | memcpy(orig_node->orig, addr, ETH_ALEN); |
785ea114 | 345 | batadv_dat_init_orig_node_addr(orig_node); |
c6c8fea2 | 346 | orig_node->router = NULL; |
c8c991bf | 347 | atomic_set(&orig_node->last_ttvn, 0); |
2dafb49d | 348 | orig_node->tt_buff = NULL; |
a73105b8 | 349 | orig_node->tt_buff_len = 0; |
42d0b044 SE |
350 | reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); |
351 | orig_node->bcast_seqno_reset = reset_time; | |
352 | orig_node->batman_seqno_reset = reset_time; | |
c6c8fea2 | 353 | |
a4c135c5 SW |
354 | atomic_set(&orig_node->bond_candidates, 0); |
355 | ||
7ea7b4a1 AQ |
356 | /* create a vlan object for the "untagged" LAN */ |
357 | vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); | |
358 | if (!vlan) | |
359 | goto free_orig_node; | |
360 | /* batadv_orig_node_vlan_new() increases the refcounter. | |
361 | * Immediately release vlan since it is not needed anymore in this | |
362 | * context | |
363 | */ | |
364 | batadv_orig_node_vlan_free_ref(vlan); | |
365 | ||
610bfc6b MH |
366 | for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { |
367 | INIT_HLIST_HEAD(&orig_node->fragments[i].head); | |
368 | spin_lock_init(&orig_node->fragments[i].lock); | |
369 | orig_node->fragments[i].size = 0; | |
370 | } | |
371 | ||
c6c8fea2 | 372 | return orig_node; |
c6c8fea2 SE |
373 | free_orig_node: |
374 | kfree(orig_node); | |
375 | return NULL; | |
376 | } | |
377 | ||
56303d34 SE |
378 | static bool |
379 | batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, | |
380 | struct batadv_orig_node *orig_node, | |
81e26b1a | 381 | struct batadv_neigh_node **best_neigh) |
c6c8fea2 | 382 | { |
81e26b1a | 383 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; |
b67bfe0d | 384 | struct hlist_node *node_tmp; |
56303d34 | 385 | struct batadv_neigh_node *neigh_node; |
c6c8fea2 | 386 | bool neigh_purged = false; |
0b0094e0 | 387 | unsigned long last_seen; |
56303d34 | 388 | struct batadv_hard_iface *if_incoming; |
c6c8fea2 | 389 | |
81e26b1a | 390 | *best_neigh = NULL; |
c6c8fea2 | 391 | |
f987ed6e ML |
392 | spin_lock_bh(&orig_node->neigh_list_lock); |
393 | ||
c6c8fea2 | 394 | /* for all neighbors towards this originator ... */ |
b67bfe0d | 395 | hlist_for_each_entry_safe(neigh_node, node_tmp, |
9591a79f | 396 | &orig_node->neigh_list, list) { |
1eda58bf SE |
397 | last_seen = neigh_node->last_seen; |
398 | if_incoming = neigh_node->if_incoming; | |
399 | ||
42d0b044 | 400 | if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) || |
e9a4f295 SE |
401 | (if_incoming->if_status == BATADV_IF_INACTIVE) || |
402 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
403 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { | |
e9a4f295 SE |
404 | if ((if_incoming->if_status == BATADV_IF_INACTIVE) || |
405 | (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || | |
406 | (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) | |
39c75a51 | 407 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
408 | "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n", |
409 | orig_node->orig, neigh_node->addr, | |
410 | if_incoming->net_dev->name); | |
c6c8fea2 | 411 | else |
39c75a51 | 412 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
413 | "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n", |
414 | orig_node->orig, neigh_node->addr, | |
415 | jiffies_to_msecs(last_seen)); | |
c6c8fea2 SE |
416 | |
417 | neigh_purged = true; | |
9591a79f | 418 | |
f987ed6e | 419 | hlist_del_rcu(&neigh_node->list); |
30d3c511 | 420 | batadv_bonding_candidate_del(orig_node, neigh_node); |
7d211efc | 421 | batadv_neigh_node_free_ref(neigh_node); |
c6c8fea2 | 422 | } else { |
81e26b1a AQ |
423 | /* store the best_neighbour if this is the first |
424 | * iteration or if a better neighbor has been found | |
425 | */ | |
426 | if (!*best_neigh || | |
427 | bao->bat_neigh_cmp(neigh_node, *best_neigh) > 0) | |
428 | *best_neigh = neigh_node; | |
c6c8fea2 SE |
429 | } |
430 | } | |
f987ed6e ML |
431 | |
432 | spin_unlock_bh(&orig_node->neigh_list_lock); | |
c6c8fea2 SE |
433 | return neigh_purged; |
434 | } | |
435 | ||
56303d34 SE |
436 | static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, |
437 | struct batadv_orig_node *orig_node) | |
c6c8fea2 | 438 | { |
56303d34 | 439 | struct batadv_neigh_node *best_neigh_node; |
c6c8fea2 | 440 | |
42d0b044 SE |
441 | if (batadv_has_timed_out(orig_node->last_seen, |
442 | 2 * BATADV_PURGE_TIMEOUT)) { | |
39c75a51 | 443 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
444 | "Originator timeout: originator %pM, last_seen %u\n", |
445 | orig_node->orig, | |
446 | jiffies_to_msecs(orig_node->last_seen)); | |
c6c8fea2 SE |
447 | return true; |
448 | } else { | |
03fc7f86 SE |
449 | if (batadv_purge_orig_neighbors(bat_priv, orig_node, |
450 | &best_neigh_node)) | |
30d3c511 SE |
451 | batadv_update_route(bat_priv, orig_node, |
452 | best_neigh_node); | |
c6c8fea2 SE |
453 | } |
454 | ||
455 | return false; | |
456 | } | |
457 | ||
56303d34 | 458 | static void _batadv_purge_orig(struct batadv_priv *bat_priv) |
c6c8fea2 | 459 | { |
5bf74e9c | 460 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
b67bfe0d | 461 | struct hlist_node *node_tmp; |
c6c8fea2 | 462 | struct hlist_head *head; |
fb778ea1 | 463 | spinlock_t *list_lock; /* spinlock to protect write access */ |
56303d34 | 464 | struct batadv_orig_node *orig_node; |
c90681b8 | 465 | uint32_t i; |
c6c8fea2 SE |
466 | |
467 | if (!hash) | |
468 | return; | |
469 | ||
c6c8fea2 SE |
470 | /* for all origins... */ |
471 | for (i = 0; i < hash->size; i++) { | |
472 | head = &hash->table[i]; | |
fb778ea1 | 473 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 474 | |
fb778ea1 | 475 | spin_lock_bh(list_lock); |
b67bfe0d | 476 | hlist_for_each_entry_safe(orig_node, node_tmp, |
7aadf889 | 477 | head, hash_entry) { |
03fc7f86 | 478 | if (batadv_purge_orig_node(bat_priv, orig_node)) { |
414254e3 | 479 | batadv_gw_node_delete(bat_priv, orig_node); |
b67bfe0d | 480 | hlist_del_rcu(&orig_node->hash_entry); |
7d211efc | 481 | batadv_orig_node_free_ref(orig_node); |
fb778ea1 | 482 | continue; |
c6c8fea2 | 483 | } |
610bfc6b MH |
484 | |
485 | batadv_frag_purge_orig(orig_node, | |
486 | batadv_frag_check_entry); | |
c6c8fea2 | 487 | } |
fb778ea1 | 488 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
489 | } |
490 | ||
7cf06bc6 SE |
491 | batadv_gw_node_purge(bat_priv); |
492 | batadv_gw_election(bat_priv); | |
c6c8fea2 SE |
493 | } |
494 | ||
03fc7f86 | 495 | static void batadv_purge_orig(struct work_struct *work) |
c6c8fea2 | 496 | { |
56303d34 SE |
497 | struct delayed_work *delayed_work; |
498 | struct batadv_priv *bat_priv; | |
c6c8fea2 | 499 | |
56303d34 SE |
500 | delayed_work = container_of(work, struct delayed_work, work); |
501 | bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); | |
03fc7f86 | 502 | _batadv_purge_orig(bat_priv); |
72414442 AQ |
503 | queue_delayed_work(batadv_event_workqueue, |
504 | &bat_priv->orig_work, | |
505 | msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); | |
c6c8fea2 SE |
506 | } |
507 | ||
56303d34 | 508 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv) |
c6c8fea2 | 509 | { |
03fc7f86 | 510 | _batadv_purge_orig(bat_priv); |
c6c8fea2 SE |
511 | } |
512 | ||
7d211efc | 513 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
514 | { |
515 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 516 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
56303d34 | 517 | struct batadv_hard_iface *primary_if; |
32ae9b22 | 518 | |
30da63a6 ML |
519 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
520 | if (!primary_if) | |
737a2a22 | 521 | return 0; |
c6c8fea2 | 522 | |
737a2a22 | 523 | seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", |
42d0b044 | 524 | BATADV_SOURCE_VERSION, primary_if->net_dev->name, |
737a2a22 AQ |
525 | primary_if->net_dev->dev_addr, net_dev->name, |
526 | bat_priv->bat_algo_ops->name); | |
c6c8fea2 | 527 | |
737a2a22 | 528 | batadv_hardif_free_ref(primary_if); |
c6c8fea2 | 529 | |
737a2a22 AQ |
530 | if (!bat_priv->bat_algo_ops->bat_orig_print) { |
531 | seq_puts(seq, | |
532 | "No printing function for this routing protocol\n"); | |
533 | return 0; | |
c6c8fea2 SE |
534 | } |
535 | ||
737a2a22 | 536 | bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq); |
c6c8fea2 | 537 | |
30da63a6 | 538 | return 0; |
c6c8fea2 SE |
539 | } |
540 | ||
56303d34 SE |
541 | static int batadv_orig_node_add_if(struct batadv_orig_node *orig_node, |
542 | int max_if_num) | |
c6c8fea2 SE |
543 | { |
544 | void *data_ptr; | |
42d0b044 | 545 | size_t data_size, old_size; |
c6c8fea2 | 546 | |
42d0b044 SE |
547 | data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS; |
548 | old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS; | |
549 | data_ptr = kmalloc(data_size, GFP_ATOMIC); | |
320f422f | 550 | if (!data_ptr) |
5346c35e | 551 | return -ENOMEM; |
c6c8fea2 | 552 | |
bbad0a5e AQ |
553 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size); |
554 | kfree(orig_node->bat_iv.bcast_own); | |
555 | orig_node->bat_iv.bcast_own = data_ptr; | |
c6c8fea2 SE |
556 | |
557 | data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); | |
320f422f | 558 | if (!data_ptr) |
5346c35e | 559 | return -ENOMEM; |
c6c8fea2 | 560 | |
bbad0a5e | 561 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, |
c6c8fea2 | 562 | (max_if_num - 1) * sizeof(uint8_t)); |
bbad0a5e AQ |
563 | kfree(orig_node->bat_iv.bcast_own_sum); |
564 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
c6c8fea2 SE |
565 | |
566 | return 0; | |
567 | } | |
568 | ||
56303d34 SE |
569 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
570 | int max_if_num) | |
c6c8fea2 | 571 | { |
56303d34 | 572 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 573 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 574 | struct hlist_head *head; |
56303d34 | 575 | struct batadv_orig_node *orig_node; |
c90681b8 AQ |
576 | uint32_t i; |
577 | int ret; | |
c6c8fea2 SE |
578 | |
579 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
580 | * if_num |
581 | */ | |
c6c8fea2 SE |
582 | for (i = 0; i < hash->size; i++) { |
583 | head = &hash->table[i]; | |
584 | ||
fb778ea1 | 585 | rcu_read_lock(); |
b67bfe0d | 586 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
bbad0a5e | 587 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
03fc7f86 | 588 | ret = batadv_orig_node_add_if(orig_node, max_if_num); |
bbad0a5e | 589 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
2ae2daf6 | 590 | |
5346c35e | 591 | if (ret == -ENOMEM) |
c6c8fea2 SE |
592 | goto err; |
593 | } | |
fb778ea1 | 594 | rcu_read_unlock(); |
c6c8fea2 SE |
595 | } |
596 | ||
c6c8fea2 SE |
597 | return 0; |
598 | ||
599 | err: | |
fb778ea1 | 600 | rcu_read_unlock(); |
c6c8fea2 SE |
601 | return -ENOMEM; |
602 | } | |
603 | ||
56303d34 | 604 | static int batadv_orig_node_del_if(struct batadv_orig_node *orig_node, |
03fc7f86 | 605 | int max_if_num, int del_if_num) |
c6c8fea2 | 606 | { |
bbad0a5e | 607 | int chunk_size, if_offset; |
c6c8fea2 | 608 | void *data_ptr = NULL; |
c6c8fea2 SE |
609 | |
610 | /* last interface was removed */ | |
611 | if (max_if_num == 0) | |
612 | goto free_bcast_own; | |
613 | ||
42d0b044 | 614 | chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS; |
c6c8fea2 | 615 | data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC); |
320f422f | 616 | if (!data_ptr) |
5346c35e | 617 | return -ENOMEM; |
c6c8fea2 SE |
618 | |
619 | /* copy first part */ | |
bbad0a5e | 620 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, del_if_num * chunk_size); |
c6c8fea2 SE |
621 | |
622 | /* copy second part */ | |
38e3c5f0 | 623 | memcpy((char *)data_ptr + del_if_num * chunk_size, |
bbad0a5e | 624 | orig_node->bat_iv.bcast_own + ((del_if_num + 1) * chunk_size), |
c6c8fea2 SE |
625 | (max_if_num - del_if_num) * chunk_size); |
626 | ||
627 | free_bcast_own: | |
bbad0a5e AQ |
628 | kfree(orig_node->bat_iv.bcast_own); |
629 | orig_node->bat_iv.bcast_own = data_ptr; | |
c6c8fea2 SE |
630 | |
631 | if (max_if_num == 0) | |
632 | goto free_own_sum; | |
633 | ||
634 | data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); | |
320f422f | 635 | if (!data_ptr) |
5346c35e | 636 | return -ENOMEM; |
c6c8fea2 | 637 | |
bbad0a5e | 638 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, |
c6c8fea2 SE |
639 | del_if_num * sizeof(uint8_t)); |
640 | ||
bbad0a5e | 641 | if_offset = (del_if_num + 1) * sizeof(uint8_t); |
38e3c5f0 | 642 | memcpy((char *)data_ptr + del_if_num * sizeof(uint8_t), |
bbad0a5e | 643 | orig_node->bat_iv.bcast_own_sum + if_offset, |
c6c8fea2 SE |
644 | (max_if_num - del_if_num) * sizeof(uint8_t)); |
645 | ||
646 | free_own_sum: | |
bbad0a5e AQ |
647 | kfree(orig_node->bat_iv.bcast_own_sum); |
648 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
c6c8fea2 SE |
649 | |
650 | return 0; | |
651 | } | |
652 | ||
56303d34 SE |
653 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, |
654 | int max_if_num) | |
c6c8fea2 | 655 | { |
56303d34 | 656 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
5bf74e9c | 657 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
c6c8fea2 | 658 | struct hlist_head *head; |
56303d34 SE |
659 | struct batadv_hard_iface *hard_iface_tmp; |
660 | struct batadv_orig_node *orig_node; | |
c90681b8 AQ |
661 | uint32_t i; |
662 | int ret; | |
c6c8fea2 SE |
663 | |
664 | /* resize all orig nodes because orig_node->bcast_own(_sum) depend on | |
9cfc7bd6 SE |
665 | * if_num |
666 | */ | |
c6c8fea2 SE |
667 | for (i = 0; i < hash->size; i++) { |
668 | head = &hash->table[i]; | |
669 | ||
fb778ea1 | 670 | rcu_read_lock(); |
b67bfe0d | 671 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
bbad0a5e | 672 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
03fc7f86 SE |
673 | ret = batadv_orig_node_del_if(orig_node, max_if_num, |
674 | hard_iface->if_num); | |
bbad0a5e | 675 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
c6c8fea2 | 676 | |
5346c35e | 677 | if (ret == -ENOMEM) |
c6c8fea2 SE |
678 | goto err; |
679 | } | |
fb778ea1 | 680 | rcu_read_unlock(); |
c6c8fea2 SE |
681 | } |
682 | ||
683 | /* renumber remaining batman interfaces _inside_ of orig_hash_lock */ | |
684 | rcu_read_lock(); | |
3193e8fd | 685 | list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) { |
e9a4f295 | 686 | if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE) |
c6c8fea2 SE |
687 | continue; |
688 | ||
e6c10f43 | 689 | if (hard_iface == hard_iface_tmp) |
c6c8fea2 SE |
690 | continue; |
691 | ||
e6c10f43 | 692 | if (hard_iface->soft_iface != hard_iface_tmp->soft_iface) |
c6c8fea2 SE |
693 | continue; |
694 | ||
e6c10f43 ML |
695 | if (hard_iface_tmp->if_num > hard_iface->if_num) |
696 | hard_iface_tmp->if_num--; | |
c6c8fea2 SE |
697 | } |
698 | rcu_read_unlock(); | |
699 | ||
e6c10f43 | 700 | hard_iface->if_num = -1; |
c6c8fea2 SE |
701 | return 0; |
702 | ||
703 | err: | |
fb778ea1 | 704 | rcu_read_unlock(); |
c6c8fea2 SE |
705 | return -ENOMEM; |
706 | } |