Commit | Line | Data |
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e19f9759 | 1 | /* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
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 | ||
18 | #include "main.h" | |
19 | #include "translation-table.h" | |
20 | #include "soft-interface.h" | |
32ae9b22 | 21 | #include "hard-interface.h" |
a73105b8 | 22 | #include "send.h" |
c6c8fea2 SE |
23 | #include "hash.h" |
24 | #include "originator.h" | |
a73105b8 | 25 | #include "routing.h" |
20ff9d59 | 26 | #include "bridge_loop_avoidance.h" |
c5caf4ef | 27 | #include "multicast.h" |
c6c8fea2 | 28 | |
ced72933 | 29 | #include <linux/crc32c.h> |
a73105b8 | 30 | |
dec05074 AQ |
31 | /* hash class keys */ |
32 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
33 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
34 | ||
56303d34 | 35 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 36 | unsigned short vid, |
56303d34 | 37 | struct batadv_orig_node *orig_node); |
a513088d SE |
38 | static void batadv_tt_purge(struct work_struct *work); |
39 | static void | |
56303d34 | 40 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
41 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
42 | struct batadv_orig_node *orig_node, | |
43 | const unsigned char *addr, | |
c018ad3d AQ |
44 | unsigned short vid, const char *message, |
45 | bool roaming); | |
c6c8fea2 | 46 | |
7aadf889 | 47 | /* returns 1 if they are the same mac addr */ |
a513088d | 48 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 49 | { |
56303d34 | 50 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 51 | hash_entry); |
7aadf889 | 52 | |
323813ed | 53 | return batadv_compare_eth(data1, data2); |
7aadf889 ML |
54 | } |
55 | ||
c018ad3d AQ |
56 | /** |
57 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
58 | * @data: pointer to the tt_common_entry object to map | |
59 | * @size: the size of the hash table | |
60 | * | |
61 | * Returns the hash index where the object represented by 'data' should be | |
62 | * stored at. | |
63 | */ | |
64 | static inline uint32_t batadv_choose_tt(const void *data, uint32_t size) | |
65 | { | |
66 | struct batadv_tt_common_entry *tt; | |
67 | uint32_t hash = 0; | |
68 | ||
69 | tt = (struct batadv_tt_common_entry *)data; | |
70 | hash = batadv_hash_bytes(hash, &tt->addr, ETH_ALEN); | |
71 | hash = batadv_hash_bytes(hash, &tt->vid, sizeof(tt->vid)); | |
72 | ||
73 | hash += (hash << 3); | |
74 | hash ^= (hash >> 11); | |
75 | hash += (hash << 15); | |
76 | ||
77 | return hash % size; | |
78 | } | |
79 | ||
80 | /** | |
81 | * batadv_tt_hash_find - look for a client in the given hash table | |
82 | * @hash: the hash table to search | |
83 | * @addr: the mac address of the client to look for | |
84 | * @vid: VLAN identifier | |
85 | * | |
86 | * Returns a pointer to the tt_common struct belonging to the searched client if | |
87 | * found, NULL otherwise. | |
88 | */ | |
56303d34 | 89 | static struct batadv_tt_common_entry * |
c018ad3d AQ |
90 | batadv_tt_hash_find(struct batadv_hashtable *hash, const uint8_t *addr, |
91 | unsigned short vid) | |
7aadf889 | 92 | { |
7aadf889 | 93 | struct hlist_head *head; |
c018ad3d | 94 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
c90681b8 | 95 | uint32_t index; |
7aadf889 ML |
96 | |
97 | if (!hash) | |
98 | return NULL; | |
99 | ||
8fdd0153 | 100 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
101 | to_search.vid = vid; |
102 | ||
103 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
104 | head = &hash->table[index]; |
105 | ||
106 | rcu_read_lock(); | |
c018ad3d AQ |
107 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
108 | if (!batadv_compare_eth(tt, addr)) | |
109 | continue; | |
110 | ||
111 | if (tt->vid != vid) | |
7aadf889 ML |
112 | continue; |
113 | ||
c018ad3d | 114 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
115 | continue; |
116 | ||
c018ad3d | 117 | tt_tmp = tt; |
7aadf889 ML |
118 | break; |
119 | } | |
120 | rcu_read_unlock(); | |
121 | ||
c018ad3d | 122 | return tt_tmp; |
7aadf889 ML |
123 | } |
124 | ||
c018ad3d AQ |
125 | /** |
126 | * batadv_tt_local_hash_find - search the local table for a given client | |
127 | * @bat_priv: the bat priv with all the soft interface information | |
128 | * @addr: the mac address of the client to look for | |
129 | * @vid: VLAN identifier | |
130 | * | |
131 | * Returns a pointer to the corresponding tt_local_entry struct if the client is | |
132 | * found, NULL otherwise. | |
133 | */ | |
56303d34 | 134 | static struct batadv_tt_local_entry * |
c018ad3d AQ |
135 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
136 | unsigned short vid) | |
7aadf889 | 137 | { |
56303d34 SE |
138 | struct batadv_tt_common_entry *tt_common_entry; |
139 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 140 | |
c018ad3d AQ |
141 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
142 | vid); | |
48100bac AQ |
143 | if (tt_common_entry) |
144 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
145 | struct batadv_tt_local_entry, |
146 | common); | |
48100bac AQ |
147 | return tt_local_entry; |
148 | } | |
7aadf889 | 149 | |
c018ad3d AQ |
150 | /** |
151 | * batadv_tt_global_hash_find - search the global table for a given client | |
152 | * @bat_priv: the bat priv with all the soft interface information | |
153 | * @addr: the mac address of the client to look for | |
154 | * @vid: VLAN identifier | |
155 | * | |
156 | * Returns a pointer to the corresponding tt_global_entry struct if the client | |
157 | * is found, NULL otherwise. | |
158 | */ | |
56303d34 | 159 | static struct batadv_tt_global_entry * |
c018ad3d AQ |
160 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
161 | unsigned short vid) | |
48100bac | 162 | { |
56303d34 SE |
163 | struct batadv_tt_common_entry *tt_common_entry; |
164 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 165 | |
c018ad3d AQ |
166 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
167 | vid); | |
48100bac AQ |
168 | if (tt_common_entry) |
169 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
170 | struct batadv_tt_global_entry, |
171 | common); | |
48100bac | 172 | return tt_global_entry; |
7aadf889 ML |
173 | } |
174 | ||
a513088d | 175 | static void |
56303d34 | 176 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 177 | { |
48100bac AQ |
178 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
179 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
180 | } |
181 | ||
21026059 AQ |
182 | /** |
183 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
184 | * tt_global_entry and possibly free it | |
185 | * @tt_global_entry: the object to free | |
186 | */ | |
a513088d | 187 | static void |
56303d34 | 188 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 189 | { |
db08e6e5 | 190 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 191 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 192 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
193 | } |
194 | } | |
195 | ||
1d8ab8d3 LL |
196 | /** |
197 | * batadv_tt_global_hash_count - count the number of orig entries | |
198 | * @hash: hash table containing the tt entries | |
199 | * @addr: the mac address of the client to count entries for | |
200 | * @vid: VLAN identifier | |
201 | * | |
202 | * Return the number of originators advertising the given address/data | |
203 | * (excluding ourself). | |
204 | */ | |
205 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
206 | const uint8_t *addr, unsigned short vid) | |
207 | { | |
208 | struct batadv_tt_global_entry *tt_global_entry; | |
209 | int count; | |
210 | ||
211 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
212 | if (!tt_global_entry) | |
213 | return 0; | |
214 | ||
215 | count = atomic_read(&tt_global_entry->orig_list_count); | |
216 | batadv_tt_global_entry_free_ref(tt_global_entry); | |
217 | ||
218 | return count; | |
219 | } | |
220 | ||
a513088d | 221 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 222 | { |
56303d34 | 223 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 224 | |
56303d34 | 225 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
226 | |
227 | /* We are in an rcu callback here, therefore we cannot use | |
228 | * batadv_orig_node_free_ref() and its call_rcu(): | |
229 | * An rcu_barrier() wouldn't wait for that to finish | |
230 | */ | |
231 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
232 | kfree(orig_entry); |
233 | } | |
234 | ||
7ea7b4a1 AQ |
235 | /** |
236 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
237 | * by vid | |
238 | * @bat_priv: the bat priv with all the soft interface information | |
239 | * @vid: the VLAN identifier of the sub-table to change | |
240 | * @v: the amount to sum to the local table size | |
241 | */ | |
242 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
243 | unsigned short vid, int v) | |
244 | { | |
245 | struct batadv_softif_vlan *vlan; | |
246 | ||
247 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
248 | if (!vlan) | |
249 | return; | |
250 | ||
251 | atomic_add(v, &vlan->tt.num_entries); | |
252 | ||
253 | batadv_softif_vlan_free_ref(vlan); | |
254 | } | |
255 | ||
256 | /** | |
257 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
258 | * vid | |
259 | * @bat_priv: the bat priv with all the soft interface information | |
260 | * @vid: the VLAN identifier | |
261 | */ | |
262 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
263 | unsigned short vid) | |
264 | { | |
265 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
266 | } | |
267 | ||
268 | /** | |
269 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
270 | * vid | |
271 | * @bat_priv: the bat priv with all the soft interface information | |
272 | * @vid: the VLAN identifier | |
273 | */ | |
274 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
275 | unsigned short vid) | |
276 | { | |
277 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
278 | } | |
279 | ||
280 | /** | |
281 | * batadv_tt_global_size_mod - change the size by v of the local table | |
282 | * identified by vid | |
283 | * @bat_priv: the bat priv with all the soft interface information | |
284 | * @vid: the VLAN identifier | |
285 | * @v: the amount to sum to the global table size | |
286 | */ | |
287 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
288 | unsigned short vid, int v) | |
289 | { | |
290 | struct batadv_orig_node_vlan *vlan; | |
291 | ||
292 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
293 | if (!vlan) | |
294 | return; | |
295 | ||
296 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
297 | spin_lock_bh(&orig_node->vlan_list_lock); | |
298 | list_del_rcu(&vlan->list); | |
299 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
300 | batadv_orig_node_vlan_free_ref(vlan); | |
301 | } | |
302 | ||
303 | batadv_orig_node_vlan_free_ref(vlan); | |
304 | } | |
305 | ||
306 | /** | |
307 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
308 | * given vid | |
309 | * @orig_node: the originator which global table size has to be decreased | |
310 | * @vid: the vlan identifier | |
311 | */ | |
312 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
313 | unsigned short vid) | |
314 | { | |
315 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
316 | } | |
317 | ||
318 | /** | |
319 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
320 | * given vid | |
321 | * @orig_node: the originator which global table size has to be decreased | |
322 | * @vid: the vlan identifier | |
323 | */ | |
324 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
325 | unsigned short vid) | |
326 | { | |
327 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
328 | } | |
329 | ||
a513088d | 330 | static void |
56303d34 | 331 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 332 | { |
d657e621 AQ |
333 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
334 | return; | |
7ea7b4a1 | 335 | |
a513088d | 336 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
337 | } |
338 | ||
3abe4adb AQ |
339 | /** |
340 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
341 | * @bat_priv: the bat priv with all the soft interface information | |
342 | * @tt_local_entry: the TT entry involved in the event | |
343 | * @event_flags: flags to store in the event structure | |
344 | */ | |
56303d34 | 345 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb AQ |
346 | struct batadv_tt_local_entry *tt_local_entry, |
347 | uint8_t event_flags) | |
a73105b8 | 348 | { |
56303d34 | 349 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb AQ |
350 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
351 | uint8_t flags = common->flags | event_flags; | |
3b643de5 AQ |
352 | bool event_removed = false; |
353 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
354 | |
355 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
356 | if (!tt_change_node) |
357 | return; | |
358 | ||
ff66c975 | 359 | tt_change_node->change.flags = flags; |
ca663046 AQ |
360 | memset(tt_change_node->change.reserved, 0, |
361 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 362 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 363 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 364 | |
acd34afa | 365 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
366 | |
367 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
368 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
369 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 370 | list) { |
3abe4adb | 371 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
372 | continue; |
373 | ||
374 | /* DEL+ADD in the same orig interval have no effect and can be | |
375 | * removed to avoid silly behaviour on the receiver side. The | |
376 | * other way around (ADD+DEL) can happen in case of roaming of | |
377 | * a client still in the NEW state. Roaming of NEW clients is | |
378 | * now possible due to automatically recognition of "temporary" | |
379 | * clients | |
380 | */ | |
acd34afa | 381 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
382 | if (!del_op_requested && del_op_entry) |
383 | goto del; | |
384 | if (del_op_requested && !del_op_entry) | |
385 | goto del; | |
3c4f7ab6 AQ |
386 | |
387 | /* this is a second add in the same originator interval. It | |
388 | * means that flags have been changed: update them! | |
389 | */ | |
390 | if (!del_op_requested && !del_op_entry) | |
391 | entry->change.flags = flags; | |
392 | ||
3b643de5 AQ |
393 | continue; |
394 | del: | |
395 | list_del(&entry->list); | |
396 | kfree(entry); | |
155e4e12 | 397 | kfree(tt_change_node); |
3b643de5 AQ |
398 | event_removed = true; |
399 | goto unlock; | |
400 | } | |
401 | ||
a73105b8 | 402 | /* track the change in the OGMinterval list */ |
807736f6 | 403 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
404 | |
405 | unlock: | |
807736f6 | 406 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 407 | |
3b643de5 | 408 | if (event_removed) |
807736f6 | 409 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 410 | else |
807736f6 | 411 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
412 | } |
413 | ||
335fbe0f ML |
414 | /** |
415 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
416 | * @changes_num: number of tt changes | |
417 | * | |
418 | * Returns computed length in bytes. | |
419 | */ | |
420 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 421 | { |
335fbe0f | 422 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
423 | } |
424 | ||
298e6e68 AQ |
425 | /** |
426 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
427 | * @tt_len: available space | |
428 | * | |
429 | * Returns the number of entries. | |
430 | */ | |
431 | static uint16_t batadv_tt_entries(uint16_t tt_len) | |
432 | { | |
433 | return tt_len / batadv_tt_len(1); | |
434 | } | |
435 | ||
a19d3d85 ML |
436 | /** |
437 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
438 | * size when transmitted over the air | |
439 | * @bat_priv: the bat priv with all the soft interface information | |
440 | * | |
441 | * Returns local translation table size in bytes. | |
442 | */ | |
443 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
444 | { | |
445 | uint16_t num_vlan = 0, tt_local_entries = 0; | |
446 | struct batadv_softif_vlan *vlan; | |
447 | int hdr_size; | |
448 | ||
449 | rcu_read_lock(); | |
450 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
451 | num_vlan++; | |
452 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
453 | } | |
454 | rcu_read_unlock(); | |
455 | ||
456 | /* header size of tvlv encapsulated tt response payload */ | |
457 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
458 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
459 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
460 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
461 | ||
462 | return hdr_size + batadv_tt_len(tt_local_entries); | |
463 | } | |
464 | ||
56303d34 | 465 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 466 | { |
807736f6 | 467 | if (bat_priv->tt.local_hash) |
5346c35e | 468 | return 0; |
c6c8fea2 | 469 | |
807736f6 | 470 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 471 | |
807736f6 | 472 | if (!bat_priv->tt.local_hash) |
5346c35e | 473 | return -ENOMEM; |
c6c8fea2 | 474 | |
dec05074 AQ |
475 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
476 | &batadv_tt_local_hash_lock_class_key); | |
477 | ||
5346c35e | 478 | return 0; |
c6c8fea2 SE |
479 | } |
480 | ||
068ee6e2 AQ |
481 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
482 | struct batadv_tt_global_entry *tt_global, | |
483 | const char *message) | |
484 | { | |
485 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
486 | "Deleting global tt entry %pM (vid: %d): %s\n", |
487 | tt_global->common.addr, | |
488 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
489 | |
490 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 491 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 492 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
493 | } |
494 | ||
c018ad3d AQ |
495 | /** |
496 | * batadv_tt_local_add - add a new client to the local table or update an | |
497 | * existing client | |
498 | * @soft_iface: netdev struct of the mesh interface | |
499 | * @addr: the mac address of the client to add | |
500 | * @vid: VLAN identifier | |
501 | * @ifindex: index of the interface where the client is connected to (useful to | |
502 | * identify wireless clients) | |
9464d071 AQ |
503 | * @mark: the value contained in the skb->mark field of the received packet (if |
504 | * any) | |
a19d3d85 ML |
505 | * |
506 | * Returns true if the client was successfully added, false otherwise. | |
c018ad3d | 507 | */ |
a19d3d85 | 508 | bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
9464d071 | 509 | unsigned short vid, int ifindex, uint32_t mark) |
c6c8fea2 | 510 | { |
56303d34 | 511 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 512 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 513 | struct batadv_tt_global_entry *tt_global = NULL; |
35df3b29 | 514 | struct batadv_softif_vlan *vlan; |
0c69aecc | 515 | struct net_device *in_dev = NULL; |
db08e6e5 | 516 | struct hlist_head *head; |
56303d34 | 517 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 ML |
518 | int hash_added, table_size, packet_size_max; |
519 | bool ret = false, roamed_back = false; | |
3c4f7ab6 | 520 | uint8_t remote_flags; |
9464d071 | 521 | uint32_t match_mark; |
c6c8fea2 | 522 | |
0c69aecc AQ |
523 | if (ifindex != BATADV_NULL_IFINDEX) |
524 | in_dev = dev_get_by_index(&init_net, ifindex); | |
525 | ||
c018ad3d | 526 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
527 | |
528 | if (!is_multicast_ether_addr(addr)) | |
529 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 530 | |
47c94655 AQ |
531 | if (tt_local) { |
532 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
533 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
534 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
535 | "Re-adding pending client %pM (vid: %d)\n", |
536 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
537 | /* whatever the reason why the PENDING flag was set, |
538 | * this is a client which was enqueued to be removed in | |
539 | * this orig_interval. Since it popped up again, the | |
540 | * flag can be reset like it was never enqueued | |
541 | */ | |
542 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
543 | goto add_event; | |
544 | } | |
545 | ||
546 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
547 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
548 | "Roaming client %pM (vid: %d) came back to its original location\n", |
549 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
550 | /* the ROAM flag is set because this client roamed away |
551 | * and the node got a roaming_advertisement message. Now | |
552 | * that the client popped up again at its original | |
553 | * location such flag can be unset | |
554 | */ | |
555 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
556 | roamed_back = true; | |
557 | } | |
558 | goto check_roaming; | |
c6c8fea2 SE |
559 | } |
560 | ||
a19d3d85 ML |
561 | /* Ignore the client if we cannot send it in a full table response. */ |
562 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
563 | table_size += batadv_tt_len(1); | |
564 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
565 | if (table_size > packet_size_max) { | |
566 | net_ratelimited_function(batadv_info, soft_iface, | |
567 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
568 | table_size, packet_size_max, addr); | |
569 | goto out; | |
570 | } | |
571 | ||
47c94655 AQ |
572 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
573 | if (!tt_local) | |
7683fdc1 | 574 | goto out; |
a73105b8 | 575 | |
35df3b29 AQ |
576 | /* increase the refcounter of the related vlan */ |
577 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
578 | ||
39c75a51 | 579 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
580 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
581 | addr, BATADV_PRINT_VID(vid), | |
807736f6 | 582 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 583 | |
8fdd0153 | 584 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
585 | /* The local entry has to be marked as NEW to avoid to send it in |
586 | * a full table response going out before the next ttvn increment | |
587 | * (consistency check) | |
588 | */ | |
589 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 590 | tt_local->common.vid = vid; |
0c69aecc | 591 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
592 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
593 | atomic_set(&tt_local->common.refcount, 2); | |
594 | tt_local->last_seen = jiffies; | |
595 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 596 | |
c5caf4ef LL |
597 | /* the batman interface mac and multicast addresses should never be |
598 | * purged | |
599 | */ | |
600 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
601 | is_multicast_ether_addr(addr)) | |
47c94655 | 602 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 603 | |
807736f6 | 604 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 605 | batadv_choose_tt, &tt_local->common, |
47c94655 | 606 | &tt_local->common.hash_entry); |
80b3f58c SW |
607 | |
608 | if (unlikely(hash_added != 0)) { | |
609 | /* remove the reference for the hash */ | |
47c94655 | 610 | batadv_tt_local_entry_free_ref(tt_local); |
35df3b29 | 611 | batadv_softif_vlan_free_ref(vlan); |
80b3f58c SW |
612 | goto out; |
613 | } | |
614 | ||
068ee6e2 | 615 | add_event: |
3abe4adb | 616 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 617 | |
068ee6e2 AQ |
618 | check_roaming: |
619 | /* Check whether it is a roaming, but don't do anything if the roaming | |
620 | * process has already been handled | |
621 | */ | |
622 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 623 | /* These node are probably going to update their tt table */ |
47c94655 | 624 | head = &tt_global->orig_list; |
db08e6e5 | 625 | rcu_read_lock(); |
b67bfe0d | 626 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 627 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 628 | tt_global->common.vid, |
a513088d | 629 | orig_entry->orig_node); |
db08e6e5 SW |
630 | } |
631 | rcu_read_unlock(); | |
068ee6e2 AQ |
632 | if (roamed_back) { |
633 | batadv_tt_global_free(bat_priv, tt_global, | |
634 | "Roaming canceled"); | |
635 | tt_global = NULL; | |
636 | } else { | |
637 | /* The global entry has to be marked as ROAMING and | |
638 | * has to be kept for consistency purpose | |
639 | */ | |
640 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
641 | tt_global->roam_at = jiffies; | |
642 | } | |
7683fdc1 | 643 | } |
068ee6e2 | 644 | |
3c4f7ab6 AQ |
645 | /* store the current remote flags before altering them. This helps |
646 | * understanding is flags are changing or not | |
647 | */ | |
648 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
649 | ||
650 | if (batadv_is_wifi_netdev(in_dev)) | |
651 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
652 | else | |
653 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 654 | |
9464d071 AQ |
655 | /* check the mark in the skb: if it's equal to the configured |
656 | * isolation_mark, it means the packet is coming from an isolated | |
657 | * non-mesh client | |
658 | */ | |
659 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
660 | if (bat_priv->isolation_mark_mask && | |
661 | match_mark == bat_priv->isolation_mark) | |
662 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
663 | else | |
664 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
665 | ||
3c4f7ab6 AQ |
666 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
667 | * entry so that all the nodes can get the new flags | |
668 | */ | |
669 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
670 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
671 | ||
672 | ret = true; | |
7683fdc1 | 673 | out: |
0c69aecc AQ |
674 | if (in_dev) |
675 | dev_put(in_dev); | |
47c94655 AQ |
676 | if (tt_local) |
677 | batadv_tt_local_entry_free_ref(tt_local); | |
678 | if (tt_global) | |
679 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 680 | return ret; |
c6c8fea2 SE |
681 | } |
682 | ||
7ea7b4a1 AQ |
683 | /** |
684 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
685 | * within a TT Response directed to another node | |
686 | * @orig_node: originator for which the TT data has to be prepared | |
687 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
688 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
689 | * changed can be stored | |
690 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
691 | * function reserves the amount of space needed to send the entire global TT | |
692 | * table. In case of success the value is updated with the real amount of | |
693 | * reserved bytes | |
694 | ||
695 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
696 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
697 | * objects, one per active VLAN served by the originator node. | |
698 | * | |
699 | * Return the size of the allocated buffer or 0 in case of failure. | |
700 | */ | |
701 | static uint16_t | |
702 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, | |
703 | struct batadv_tvlv_tt_data **tt_data, | |
704 | struct batadv_tvlv_tt_change **tt_change, | |
705 | int32_t *tt_len) | |
706 | { | |
707 | uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len; | |
708 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
709 | struct batadv_orig_node_vlan *vlan; | |
710 | uint8_t *tt_change_ptr; | |
711 | ||
712 | rcu_read_lock(); | |
713 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
714 | num_vlan++; | |
715 | num_entries += atomic_read(&vlan->tt.num_entries); | |
716 | } | |
717 | ||
718 | change_offset = sizeof(**tt_data); | |
719 | change_offset += num_vlan * sizeof(*tt_vlan); | |
720 | ||
721 | /* if tt_len is negative, allocate the space needed by the full table */ | |
722 | if (*tt_len < 0) | |
723 | *tt_len = batadv_tt_len(num_entries); | |
724 | ||
725 | tvlv_len = *tt_len; | |
726 | tvlv_len += change_offset; | |
727 | ||
728 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
729 | if (!*tt_data) { | |
730 | *tt_len = 0; | |
731 | goto out; | |
732 | } | |
733 | ||
734 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
735 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
736 | (*tt_data)->num_vlan = htons(num_vlan); | |
737 | ||
738 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
739 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
740 | tt_vlan->vid = htons(vlan->vid); | |
741 | tt_vlan->crc = htonl(vlan->tt.crc); | |
742 | ||
743 | tt_vlan++; | |
744 | } | |
745 | ||
746 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
747 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
748 | ||
749 | out: | |
750 | rcu_read_unlock(); | |
751 | return tvlv_len; | |
752 | } | |
753 | ||
754 | /** | |
755 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
756 | * node | |
757 | * @bat_priv: the bat priv with all the soft interface information | |
758 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
759 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
760 | * changes can be stored | |
761 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
762 | * function reserves the amount of space needed to send the entire local TT | |
763 | * table. In case of success the value is updated with the real amount of | |
764 | * reserved bytes | |
765 | * | |
766 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
767 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
768 | * objects, one per active VLAN. | |
769 | * | |
770 | * Return the size of the allocated buffer or 0 in case of failure. | |
771 | */ | |
772 | static uint16_t | |
773 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, | |
774 | struct batadv_tvlv_tt_data **tt_data, | |
775 | struct batadv_tvlv_tt_change **tt_change, | |
776 | int32_t *tt_len) | |
777 | { | |
778 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
779 | struct batadv_softif_vlan *vlan; | |
780 | uint16_t num_vlan = 0, num_entries = 0, tvlv_len; | |
781 | uint8_t *tt_change_ptr; | |
782 | int change_offset; | |
783 | ||
784 | rcu_read_lock(); | |
785 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
786 | num_vlan++; | |
787 | num_entries += atomic_read(&vlan->tt.num_entries); | |
788 | } | |
789 | ||
790 | change_offset = sizeof(**tt_data); | |
791 | change_offset += num_vlan * sizeof(*tt_vlan); | |
792 | ||
793 | /* if tt_len is negative, allocate the space needed by the full table */ | |
794 | if (*tt_len < 0) | |
795 | *tt_len = batadv_tt_len(num_entries); | |
796 | ||
797 | tvlv_len = *tt_len; | |
798 | tvlv_len += change_offset; | |
799 | ||
800 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
801 | if (!*tt_data) { | |
802 | tvlv_len = 0; | |
803 | goto out; | |
804 | } | |
805 | ||
806 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
807 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
808 | (*tt_data)->num_vlan = htons(num_vlan); | |
809 | ||
810 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
811 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
812 | tt_vlan->vid = htons(vlan->vid); | |
813 | tt_vlan->crc = htonl(vlan->tt.crc); | |
814 | ||
815 | tt_vlan++; | |
816 | } | |
817 | ||
818 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
819 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
820 | ||
821 | out: | |
822 | rcu_read_unlock(); | |
823 | return tvlv_len; | |
824 | } | |
825 | ||
e1bf0c14 ML |
826 | /** |
827 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
828 | * after local tt changes have been committed | |
829 | * @bat_priv: the bat priv with all the soft interface information | |
830 | */ | |
831 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 832 | { |
e1bf0c14 ML |
833 | struct batadv_tt_change_node *entry, *safe; |
834 | struct batadv_tvlv_tt_data *tt_data; | |
835 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 836 | int tt_diff_len, tt_change_len = 0; |
e1bf0c14 | 837 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; |
7ea7b4a1 | 838 | uint16_t tvlv_len; |
be9aa4c1 | 839 | |
7ea7b4a1 AQ |
840 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
841 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
842 | |
843 | /* if we have too many changes for one packet don't send any | |
844 | * and wait for the tt table request which will be fragmented | |
845 | */ | |
e1bf0c14 ML |
846 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
847 | tt_diff_len = 0; | |
be9aa4c1 | 848 | |
7ea7b4a1 AQ |
849 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
850 | &tt_change, &tt_diff_len); | |
851 | if (!tvlv_len) | |
e1bf0c14 | 852 | return; |
be9aa4c1 | 853 | |
e1bf0c14 | 854 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 855 | |
e1bf0c14 ML |
856 | if (tt_diff_len == 0) |
857 | goto container_register; | |
be9aa4c1 | 858 | |
807736f6 SE |
859 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
860 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 861 | |
807736f6 | 862 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 863 | list) { |
e1bf0c14 ML |
864 | if (tt_diff_entries_count < tt_diff_entries_num) { |
865 | memcpy(tt_change + tt_diff_entries_count, | |
866 | &entry->change, | |
867 | sizeof(struct batadv_tvlv_tt_change)); | |
868 | tt_diff_entries_count++; | |
c6c8fea2 | 869 | } |
a73105b8 AQ |
870 | list_del(&entry->list); |
871 | kfree(entry); | |
c6c8fea2 | 872 | } |
807736f6 | 873 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
874 | |
875 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
876 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
877 | kfree(bat_priv->tt.last_changeset); | |
878 | bat_priv->tt.last_changeset_len = 0; | |
879 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 880 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 881 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 882 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 883 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
884 | * instead of providing the diff |
885 | */ | |
e1bf0c14 | 886 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 887 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
888 | memcpy(bat_priv->tt.last_changeset, |
889 | tt_change, tt_change_len); | |
890 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
891 | } |
892 | } | |
807736f6 | 893 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 894 | |
e1bf0c14 ML |
895 | container_register: |
896 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 897 | tvlv_len); |
e1bf0c14 | 898 | kfree(tt_data); |
c6c8fea2 SE |
899 | } |
900 | ||
08c36d3e | 901 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
902 | { |
903 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 904 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 905 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 906 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 907 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 908 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 909 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 910 | struct hlist_head *head; |
7ea7b4a1 | 911 | unsigned short vid; |
c90681b8 | 912 | uint32_t i; |
85766a82 AQ |
913 | int last_seen_secs; |
914 | int last_seen_msecs; | |
915 | unsigned long last_seen_jiffies; | |
916 | bool no_purge; | |
917 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 918 | |
30da63a6 ML |
919 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
920 | if (!primary_if) | |
32ae9b22 | 921 | goto out; |
c6c8fea2 | 922 | |
86ceb360 | 923 | seq_printf(seq, |
7ea7b4a1 AQ |
924 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
925 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); | |
dd24ddb2 | 926 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 927 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 928 | |
c6c8fea2 SE |
929 | for (i = 0; i < hash->size; i++) { |
930 | head = &hash->table[i]; | |
931 | ||
7aadf889 | 932 | rcu_read_lock(); |
b67bfe0d | 933 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 934 | head, hash_entry) { |
85766a82 AQ |
935 | tt_local = container_of(tt_common_entry, |
936 | struct batadv_tt_local_entry, | |
937 | common); | |
7ea7b4a1 | 938 | vid = tt_common_entry->vid; |
85766a82 AQ |
939 | last_seen_jiffies = jiffies - tt_local->last_seen; |
940 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
941 | last_seen_secs = last_seen_msecs / 1000; | |
942 | last_seen_msecs = last_seen_msecs % 1000; | |
943 | ||
944 | no_purge = tt_common_entry->flags & np_flag; | |
945 | ||
7ea7b4a1 AQ |
946 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
947 | if (!vlan) { | |
948 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
949 | BATADV_PRINT_VID(vid)); | |
950 | continue; | |
951 | } | |
952 | ||
953 | seq_printf(seq, | |
dd24ddb2 | 954 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 955 | tt_common_entry->addr, |
16052789 | 956 | BATADV_PRINT_VID(tt_common_entry->vid), |
7c64fd98 | 957 | (tt_common_entry->flags & |
acd34afa | 958 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
85766a82 | 959 | no_purge ? 'P' : '.', |
7c64fd98 | 960 | (tt_common_entry->flags & |
acd34afa | 961 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 962 | (tt_common_entry->flags & |
acd34afa | 963 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 964 | (tt_common_entry->flags & |
85766a82 | 965 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
dd24ddb2 AQ |
966 | (tt_common_entry->flags & |
967 | BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), | |
a7966d90 | 968 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
969 | no_purge ? 0 : last_seen_msecs, |
970 | vlan->tt.crc); | |
971 | ||
972 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 973 | } |
7aadf889 | 974 | rcu_read_unlock(); |
c6c8fea2 | 975 | } |
32ae9b22 ML |
976 | out: |
977 | if (primary_if) | |
e5d89254 | 978 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 979 | return 0; |
c6c8fea2 SE |
980 | } |
981 | ||
56303d34 SE |
982 | static void |
983 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
984 | struct batadv_tt_local_entry *tt_local_entry, | |
985 | uint16_t flags, const char *message) | |
c6c8fea2 | 986 | { |
3abe4adb | 987 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 988 | |
015758d0 AQ |
989 | /* The local client has to be marked as "pending to be removed" but has |
990 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
991 | * response issued before the net ttvn increment (consistency check) |
992 | */ | |
acd34afa | 993 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 994 | |
39c75a51 | 995 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
996 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
997 | tt_local_entry->common.addr, | |
998 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
999 | } |
1000 | ||
7f91d06c AQ |
1001 | /** |
1002 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1003 | * @bat_priv: the bat priv with all the soft interface information | |
1004 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1005 | * @vid: VLAN identifier |
7f91d06c AQ |
1006 | * @message: message to append to the log on deletion |
1007 | * @roaming: true if the deletion is due to a roaming event | |
1008 | * | |
1009 | * Returns the flags assigned to the local entry before being deleted | |
1010 | */ | |
1011 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
c018ad3d AQ |
1012 | const uint8_t *addr, unsigned short vid, |
1013 | const char *message, bool roaming) | |
c6c8fea2 | 1014 | { |
170173bf | 1015 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 1016 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
35df3b29 | 1017 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 1018 | |
c018ad3d | 1019 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1020 | if (!tt_local_entry) |
1021 | goto out; | |
1022 | ||
7f91d06c AQ |
1023 | curr_flags = tt_local_entry->common.flags; |
1024 | ||
acd34afa | 1025 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1026 | /* if this global entry addition is due to a roaming, the node has to |
1027 | * mark the local entry as "roamed" in order to correctly reroute | |
1028 | * packets later | |
1029 | */ | |
7c1fd91d | 1030 | if (roaming) { |
acd34afa | 1031 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1032 | /* mark the local client as ROAMed */ |
1033 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1034 | } | |
42d0b044 | 1035 | |
068ee6e2 AQ |
1036 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1037 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1038 | message); | |
1039 | goto out; | |
1040 | } | |
1041 | /* if this client has been added right now, it is possible to | |
1042 | * immediately purge it | |
1043 | */ | |
3abe4adb | 1044 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
068ee6e2 AQ |
1045 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
1046 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 1047 | |
35df3b29 AQ |
1048 | /* decrease the reference held for this vlan */ |
1049 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
1050 | batadv_softif_vlan_free_ref(vlan); | |
1051 | batadv_softif_vlan_free_ref(vlan); | |
1052 | ||
7683fdc1 AQ |
1053 | out: |
1054 | if (tt_local_entry) | |
a513088d | 1055 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1056 | |
1057 | return curr_flags; | |
c6c8fea2 SE |
1058 | } |
1059 | ||
a19d3d85 ML |
1060 | /** |
1061 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1062 | * @bat_priv: the bat priv with all the soft interface information | |
1063 | * @head: pointer to the list containing the local tt entries | |
1064 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1065 | * inactive or not | |
1066 | */ | |
56303d34 | 1067 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1068 | struct hlist_head *head, |
1069 | int timeout) | |
c6c8fea2 | 1070 | { |
56303d34 SE |
1071 | struct batadv_tt_local_entry *tt_local_entry; |
1072 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1073 | struct hlist_node *node_tmp; |
acd34afa | 1074 | |
b67bfe0d | 1075 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1076 | hash_entry) { |
1077 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1078 | struct batadv_tt_local_entry, |
1079 | common); | |
acd34afa SE |
1080 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1081 | continue; | |
1082 | ||
1083 | /* entry already marked for deletion */ | |
1084 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1085 | continue; | |
1086 | ||
a19d3d85 | 1087 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1088 | continue; |
1089 | ||
1090 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1091 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1092 | } | |
1093 | } | |
1094 | ||
a19d3d85 ML |
1095 | /** |
1096 | * batadv_tt_local_purge - purge inactive tt local entries | |
1097 | * @bat_priv: the bat priv with all the soft interface information | |
1098 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1099 | * inactive or not | |
1100 | */ | |
1101 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1102 | int timeout) | |
acd34afa | 1103 | { |
807736f6 | 1104 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1105 | struct hlist_head *head; |
7683fdc1 | 1106 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1107 | uint32_t i; |
c6c8fea2 | 1108 | |
c6c8fea2 SE |
1109 | for (i = 0; i < hash->size; i++) { |
1110 | head = &hash->table[i]; | |
7683fdc1 | 1111 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1112 | |
7683fdc1 | 1113 | spin_lock_bh(list_lock); |
a19d3d85 | 1114 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1115 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1116 | } |
c6c8fea2 SE |
1117 | } |
1118 | ||
56303d34 | 1119 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1120 | { |
5bf74e9c | 1121 | struct batadv_hashtable *hash; |
a73105b8 | 1122 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1123 | struct batadv_tt_common_entry *tt_common_entry; |
1124 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 1125 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 1126 | struct hlist_node *node_tmp; |
7683fdc1 | 1127 | struct hlist_head *head; |
c90681b8 | 1128 | uint32_t i; |
a73105b8 | 1129 | |
807736f6 | 1130 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1131 | return; |
1132 | ||
807736f6 | 1133 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1134 | |
1135 | for (i = 0; i < hash->size; i++) { | |
1136 | head = &hash->table[i]; | |
1137 | list_lock = &hash->list_locks[i]; | |
1138 | ||
1139 | spin_lock_bh(list_lock); | |
b67bfe0d | 1140 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1141 | head, hash_entry) { |
b67bfe0d | 1142 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1143 | tt_local = container_of(tt_common_entry, |
1144 | struct batadv_tt_local_entry, | |
1145 | common); | |
35df3b29 AQ |
1146 | |
1147 | /* decrease the reference held for this vlan */ | |
1148 | vlan = batadv_softif_vlan_get(bat_priv, | |
1149 | tt_common_entry->vid); | |
1150 | batadv_softif_vlan_free_ref(vlan); | |
1151 | batadv_softif_vlan_free_ref(vlan); | |
1152 | ||
56303d34 | 1153 | batadv_tt_local_entry_free_ref(tt_local); |
a73105b8 AQ |
1154 | } |
1155 | spin_unlock_bh(list_lock); | |
1156 | } | |
1157 | ||
1a8eaf07 | 1158 | batadv_hash_destroy(hash); |
a73105b8 | 1159 | |
807736f6 | 1160 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1161 | } |
1162 | ||
56303d34 | 1163 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1164 | { |
807736f6 | 1165 | if (bat_priv->tt.global_hash) |
5346c35e | 1166 | return 0; |
c6c8fea2 | 1167 | |
807736f6 | 1168 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1169 | |
807736f6 | 1170 | if (!bat_priv->tt.global_hash) |
5346c35e | 1171 | return -ENOMEM; |
c6c8fea2 | 1172 | |
dec05074 AQ |
1173 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1174 | &batadv_tt_global_hash_lock_class_key); | |
1175 | ||
5346c35e | 1176 | return 0; |
c6c8fea2 SE |
1177 | } |
1178 | ||
56303d34 | 1179 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1180 | { |
56303d34 | 1181 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1182 | |
807736f6 | 1183 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1184 | |
807736f6 | 1185 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1186 | list) { |
1187 | list_del(&entry->list); | |
1188 | kfree(entry); | |
1189 | } | |
c6c8fea2 | 1190 | |
807736f6 SE |
1191 | atomic_set(&bat_priv->tt.local_changes, 0); |
1192 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1193 | } |
c6c8fea2 | 1194 | |
d657e621 AQ |
1195 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1196 | * batadv_tt_global_entry list | |
1197 | * | |
1198 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1199 | */ |
d657e621 AQ |
1200 | static struct batadv_tt_orig_list_entry * |
1201 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1202 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1203 | { |
d657e621 | 1204 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1205 | const struct hlist_head *head; |
db08e6e5 SW |
1206 | |
1207 | rcu_read_lock(); | |
1208 | head = &entry->orig_list; | |
b67bfe0d | 1209 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1210 | if (tmp_orig_entry->orig_node != orig_node) |
1211 | continue; | |
1212 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1213 | continue; | |
1214 | ||
1215 | orig_entry = tmp_orig_entry; | |
1216 | break; | |
db08e6e5 SW |
1217 | } |
1218 | rcu_read_unlock(); | |
d657e621 AQ |
1219 | |
1220 | return orig_entry; | |
1221 | } | |
1222 | ||
1223 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1224 | * returns true if found, false otherwise | |
1225 | */ | |
1226 | static bool | |
1227 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1228 | const struct batadv_orig_node *orig_node) | |
1229 | { | |
1230 | struct batadv_tt_orig_list_entry *orig_entry; | |
1231 | bool found = false; | |
1232 | ||
1233 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1234 | if (orig_entry) { | |
1235 | found = true; | |
1236 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1237 | } | |
1238 | ||
db08e6e5 SW |
1239 | return found; |
1240 | } | |
1241 | ||
a513088d | 1242 | static void |
d657e621 | 1243 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1244 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1245 | { |
56303d34 | 1246 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1247 | |
d657e621 | 1248 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1249 | if (orig_entry) { |
1250 | /* refresh the ttvn: the current value could be a bogus one that | |
1251 | * was added during a "temporary client detection" | |
1252 | */ | |
1253 | orig_entry->ttvn = ttvn; | |
d657e621 | 1254 | goto out; |
30cfd02b | 1255 | } |
d657e621 | 1256 | |
db08e6e5 SW |
1257 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1258 | if (!orig_entry) | |
d657e621 | 1259 | goto out; |
db08e6e5 SW |
1260 | |
1261 | INIT_HLIST_NODE(&orig_entry->list); | |
1262 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1263 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1264 | orig_entry->orig_node = orig_node; |
1265 | orig_entry->ttvn = ttvn; | |
d657e621 | 1266 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1267 | |
d657e621 | 1268 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1269 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1270 | &tt_global->orig_list); |
1271 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1272 | atomic_inc(&tt_global->orig_list_count); |
1273 | ||
d657e621 AQ |
1274 | out: |
1275 | if (orig_entry) | |
1276 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1277 | } |
1278 | ||
d4ff40f6 AQ |
1279 | /** |
1280 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1281 | * @bat_priv: the bat priv with all the soft interface information | |
1282 | * @orig_node: the originator announcing the client | |
1283 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1284 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1285 | * @flags: TT flags that have to be set for this non-mesh client |
1286 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1287 | * | |
1288 | * Add a new TT global entry for the given originator. If the entry already | |
1289 | * exists add a new reference to the given originator (a global entry can have | |
1290 | * references to multiple originators) and adjust the flags attribute to reflect | |
1291 | * the function argument. | |
1292 | * If a TT local entry exists for this non-mesh client remove it. | |
1293 | * | |
1294 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1295 | * |
1296 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1297 | */ |
1e5d49fc AQ |
1298 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1299 | struct batadv_orig_node *orig_node, | |
c018ad3d AQ |
1300 | const unsigned char *tt_addr, |
1301 | unsigned short vid, uint16_t flags, | |
1e5d49fc | 1302 | uint8_t ttvn) |
a73105b8 | 1303 | { |
170173bf SE |
1304 | struct batadv_tt_global_entry *tt_global_entry; |
1305 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1306 | bool ret = false; |
80b3f58c | 1307 | int hash_added; |
56303d34 | 1308 | struct batadv_tt_common_entry *common; |
7f91d06c | 1309 | uint16_t local_flags; |
c6c8fea2 | 1310 | |
cfd4f757 AQ |
1311 | /* ignore global entries from backbone nodes */ |
1312 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1313 | return true; | |
1314 | ||
c018ad3d AQ |
1315 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1316 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1317 | |
1318 | /* if the node already has a local client for this entry, it has to wait | |
1319 | * for a roaming advertisement instead of manually messing up the global | |
1320 | * table | |
1321 | */ | |
1322 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1323 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1324 | goto out; | |
a73105b8 AQ |
1325 | |
1326 | if (!tt_global_entry) { | |
d4f44692 | 1327 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1328 | if (!tt_global_entry) |
7683fdc1 AQ |
1329 | goto out; |
1330 | ||
c0a55929 | 1331 | common = &tt_global_entry->common; |
8fdd0153 | 1332 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1333 | common->vid = vid; |
db08e6e5 | 1334 | |
d4f44692 | 1335 | common->flags = flags; |
cc47f66e | 1336 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1337 | /* node must store current time in case of roaming. This is |
1338 | * needed to purge this entry out on timeout (if nobody claims | |
1339 | * it) | |
1340 | */ | |
1341 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1342 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1343 | atomic_set(&common->refcount, 2); |
30cfd02b | 1344 | common->added_at = jiffies; |
db08e6e5 SW |
1345 | |
1346 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1347 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1348 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1349 | |
807736f6 | 1350 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1351 | batadv_compare_tt, |
c018ad3d | 1352 | batadv_choose_tt, common, |
a513088d | 1353 | &common->hash_entry); |
80b3f58c SW |
1354 | |
1355 | if (unlikely(hash_added != 0)) { | |
1356 | /* remove the reference for the hash */ | |
a513088d | 1357 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1358 | goto out_remove; |
1359 | } | |
a73105b8 | 1360 | } else { |
068ee6e2 | 1361 | common = &tt_global_entry->common; |
30cfd02b AQ |
1362 | /* If there is already a global entry, we can use this one for |
1363 | * our processing. | |
068ee6e2 AQ |
1364 | * But if we are trying to add a temporary client then here are |
1365 | * two options at this point: | |
1366 | * 1) the global client is not a temporary client: the global | |
1367 | * client has to be left as it is, temporary information | |
1368 | * should never override any already known client state | |
1369 | * 2) the global client is a temporary client: purge the | |
1370 | * originator list and add the new one orig_entry | |
30cfd02b | 1371 | */ |
068ee6e2 AQ |
1372 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1373 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1374 | goto out; | |
1375 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1376 | orig_node)) | |
1377 | goto out_remove; | |
1378 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1379 | goto add_orig_entry; | |
1380 | } | |
30cfd02b AQ |
1381 | |
1382 | /* if the client was temporary added before receiving the first | |
1383 | * OGM announcing it, we have to clear the TEMP flag | |
1384 | */ | |
068ee6e2 | 1385 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 1386 | |
e9c00136 AQ |
1387 | /* the change can carry possible "attribute" flags like the |
1388 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1389 | * client entry | |
1390 | */ | |
1391 | tt_global_entry->common.flags |= flags; | |
1392 | ||
acd34afa SE |
1393 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1394 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1395 | * delete + roaming change for this originator. |
1396 | * | |
1397 | * We should first delete the old originator before adding the | |
1398 | * new one. | |
1399 | */ | |
068ee6e2 | 1400 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1401 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1402 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1403 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1404 | } |
1405 | } | |
068ee6e2 | 1406 | add_orig_entry: |
30cfd02b | 1407 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1408 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1409 | |
39c75a51 | 1410 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1411 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1412 | common->addr, BATADV_PRINT_VID(common->vid), | |
1413 | orig_node->orig); | |
1e5d49fc | 1414 | ret = true; |
c6c8fea2 | 1415 | |
80b3f58c | 1416 | out_remove: |
c5caf4ef LL |
1417 | /* Do not remove multicast addresses from the local hash on |
1418 | * global additions | |
1419 | */ | |
1420 | if (is_multicast_ether_addr(tt_addr)) | |
1421 | goto out; | |
7f91d06c | 1422 | |
a73105b8 | 1423 | /* remove address from local hash if present */ |
c018ad3d | 1424 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1425 | "global tt received", |
c1d07431 | 1426 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1427 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1428 | ||
068ee6e2 AQ |
1429 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1430 | /* this is a normal global add. Therefore the client is not in a | |
1431 | * roaming state anymore. | |
1432 | */ | |
1433 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1434 | ||
7683fdc1 AQ |
1435 | out: |
1436 | if (tt_global_entry) | |
a513088d | 1437 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1438 | if (tt_local_entry) |
1439 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1440 | return ret; |
c6c8fea2 SE |
1441 | } |
1442 | ||
1b371d13 SW |
1443 | /** |
1444 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1445 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1446 | * @tt_global_entry: global translation table entry to be analyzed |
1447 | * | |
1448 | * This functon assumes the caller holds rcu_read_lock(). | |
1449 | * Returns best originator list entry or NULL on errors. | |
1450 | */ | |
1451 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1452 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1453 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1454 | { |
4627456a AQ |
1455 | struct batadv_neigh_node *router, *best_router = NULL; |
1456 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1457 | struct hlist_head *head; |
981d8900 | 1458 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1459 | |
1460 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1461 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1462 | router = batadv_orig_router_get(orig_entry->orig_node, |
1463 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1464 | if (!router) |
1465 | continue; | |
1466 | ||
4627456a | 1467 | if (best_router && |
89652331 SW |
1468 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1469 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1470 | batadv_neigh_node_free_ref(router); |
1471 | continue; | |
981d8900 SE |
1472 | } |
1473 | ||
4627456a AQ |
1474 | /* release the refcount for the "old" best */ |
1475 | if (best_router) | |
1476 | batadv_neigh_node_free_ref(best_router); | |
1477 | ||
1478 | best_entry = orig_entry; | |
1479 | best_router = router; | |
981d8900 SE |
1480 | } |
1481 | ||
4627456a AQ |
1482 | if (best_router) |
1483 | batadv_neigh_node_free_ref(best_router); | |
1484 | ||
981d8900 SE |
1485 | return best_entry; |
1486 | } | |
1487 | ||
1b371d13 SW |
1488 | /** |
1489 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1490 | * for this global entry | |
4627456a | 1491 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1492 | * @tt_global_entry: global translation table entry to be printed |
1493 | * @seq: debugfs table seq_file struct | |
1494 | * | |
1495 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1496 | */ |
a513088d | 1497 | static void |
4627456a AQ |
1498 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1499 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1500 | struct seq_file *seq) |
db08e6e5 | 1501 | { |
981d8900 | 1502 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1503 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1504 | struct batadv_orig_node_vlan *vlan; |
1505 | struct hlist_head *head; | |
db08e6e5 | 1506 | uint8_t last_ttvn; |
7ea7b4a1 | 1507 | uint16_t flags; |
db08e6e5 SW |
1508 | |
1509 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1510 | flags = tt_common_entry->flags; |
1511 | ||
4627456a | 1512 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1513 | if (best_entry) { |
7ea7b4a1 AQ |
1514 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1515 | tt_common_entry->vid); | |
1516 | if (!vlan) { | |
1517 | seq_printf(seq, | |
1518 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1519 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1520 | best_entry->orig_node->orig); | |
1521 | goto print_list; | |
1522 | } | |
1523 | ||
981d8900 | 1524 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1525 | seq_printf(seq, |
dd24ddb2 | 1526 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1527 | '*', tt_global_entry->common.addr, |
16052789 | 1528 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1529 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1530 | last_ttvn, vlan->tt.crc, |
981d8900 SE |
1531 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1532 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
dd24ddb2 | 1533 | (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), |
981d8900 | 1534 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
7ea7b4a1 AQ |
1535 | |
1536 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1537 | } |
db08e6e5 | 1538 | |
7ea7b4a1 | 1539 | print_list: |
db08e6e5 SW |
1540 | head = &tt_global_entry->orig_list; |
1541 | ||
b67bfe0d | 1542 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1543 | if (best_entry == orig_entry) |
1544 | continue; | |
1545 | ||
7ea7b4a1 AQ |
1546 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1547 | tt_common_entry->vid); | |
1548 | if (!vlan) { | |
1549 | seq_printf(seq, | |
1550 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1551 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1552 | orig_entry->orig_node->orig); | |
1553 | continue; | |
1554 | } | |
1555 | ||
db08e6e5 | 1556 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1557 | seq_printf(seq, |
dd24ddb2 | 1558 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1559 | '+', tt_global_entry->common.addr, |
16052789 | 1560 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1561 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1562 | last_ttvn, vlan->tt.crc, |
acd34afa | 1563 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b | 1564 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
dd24ddb2 | 1565 | (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), |
30cfd02b | 1566 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
7ea7b4a1 AQ |
1567 | |
1568 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1569 | } |
1570 | } | |
1571 | ||
08c36d3e | 1572 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1573 | { |
1574 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1575 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1576 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1577 | struct batadv_tt_common_entry *tt_common_entry; |
1578 | struct batadv_tt_global_entry *tt_global; | |
1579 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1580 | struct hlist_head *head; |
c90681b8 | 1581 | uint32_t i; |
c6c8fea2 | 1582 | |
30da63a6 ML |
1583 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1584 | if (!primary_if) | |
32ae9b22 | 1585 | goto out; |
c6c8fea2 | 1586 | |
2dafb49d AQ |
1587 | seq_printf(seq, |
1588 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1589 | net_dev->name); |
16052789 AQ |
1590 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1591 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1592 | "CRC", "Flags"); | |
c6c8fea2 | 1593 | |
c6c8fea2 SE |
1594 | for (i = 0; i < hash->size; i++) { |
1595 | head = &hash->table[i]; | |
1596 | ||
7aadf889 | 1597 | rcu_read_lock(); |
b67bfe0d | 1598 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1599 | head, hash_entry) { |
56303d34 SE |
1600 | tt_global = container_of(tt_common_entry, |
1601 | struct batadv_tt_global_entry, | |
1602 | common); | |
4627456a | 1603 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1604 | } |
7aadf889 | 1605 | rcu_read_unlock(); |
c6c8fea2 | 1606 | } |
32ae9b22 ML |
1607 | out: |
1608 | if (primary_if) | |
e5d89254 | 1609 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1610 | return 0; |
c6c8fea2 SE |
1611 | } |
1612 | ||
1d8ab8d3 LL |
1613 | /** |
1614 | * batadv_tt_global_del_orig_entry - remove and free an orig_entry | |
1615 | * @tt_global_entry: the global entry to remove the orig_entry from | |
1616 | * @orig_entry: the orig entry to remove and free | |
1617 | * | |
1618 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1619 | * free this orig_entry afterwards. | |
1620 | */ | |
1621 | static void | |
1622 | batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, | |
1623 | struct batadv_tt_orig_list_entry *orig_entry) | |
1624 | { | |
1625 | batadv_tt_global_size_dec(orig_entry->orig_node, | |
1626 | tt_global_entry->common.vid); | |
1627 | atomic_dec(&tt_global_entry->orig_list_count); | |
1628 | hlist_del_rcu(&orig_entry->list); | |
1629 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1630 | } | |
1631 | ||
db08e6e5 | 1632 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1633 | static void |
56303d34 | 1634 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1635 | { |
db08e6e5 | 1636 | struct hlist_head *head; |
b67bfe0d | 1637 | struct hlist_node *safe; |
56303d34 | 1638 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1639 | |
db08e6e5 SW |
1640 | spin_lock_bh(&tt_global_entry->list_lock); |
1641 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 LL |
1642 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
1643 | batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); | |
db08e6e5 | 1644 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1645 | } |
1646 | ||
1d8ab8d3 LL |
1647 | /** |
1648 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1649 | * @bat_priv: the bat priv with all the soft interface information | |
1650 | * @tt_global_entry: the global entry to remove the orig_node from | |
1651 | * @orig_node: the originator announcing the client | |
1652 | * @message: message to append to the log on deletion | |
1653 | * | |
1654 | * Remove the given orig_node and its according orig_entry from the given | |
1655 | * global tt entry. | |
1656 | */ | |
a513088d | 1657 | static void |
1d8ab8d3 LL |
1658 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1659 | struct batadv_tt_global_entry *tt_global_entry, | |
1660 | struct batadv_orig_node *orig_node, | |
1661 | const char *message) | |
db08e6e5 SW |
1662 | { |
1663 | struct hlist_head *head; | |
b67bfe0d | 1664 | struct hlist_node *safe; |
56303d34 | 1665 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1666 | unsigned short vid; |
db08e6e5 SW |
1667 | |
1668 | spin_lock_bh(&tt_global_entry->list_lock); | |
1669 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1670 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1671 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1672 | vid = tt_global_entry->common.vid; |
39c75a51 | 1673 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1674 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1675 | orig_node->orig, |
16052789 AQ |
1676 | tt_global_entry->common.addr, |
1677 | BATADV_PRINT_VID(vid), message); | |
1d8ab8d3 LL |
1678 | batadv_tt_global_del_orig_entry(tt_global_entry, |
1679 | orig_entry); | |
db08e6e5 SW |
1680 | } |
1681 | } | |
1682 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1683 | } | |
1684 | ||
db08e6e5 | 1685 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1686 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1687 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1688 | */ |
a513088d | 1689 | static void |
56303d34 SE |
1690 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1691 | struct batadv_tt_global_entry *tt_global_entry, | |
1692 | struct batadv_orig_node *orig_node, | |
1693 | const char *message) | |
db08e6e5 SW |
1694 | { |
1695 | bool last_entry = true; | |
1696 | struct hlist_head *head; | |
56303d34 | 1697 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1698 | |
1699 | /* no local entry exists, case 1: | |
1700 | * Check if this is the last one or if other entries exist. | |
1701 | */ | |
1702 | ||
1703 | rcu_read_lock(); | |
1704 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1705 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1706 | if (orig_entry->orig_node != orig_node) { |
1707 | last_entry = false; | |
1708 | break; | |
1709 | } | |
1710 | } | |
1711 | rcu_read_unlock(); | |
1712 | ||
1713 | if (last_entry) { | |
1714 | /* its the last one, mark for roaming. */ | |
acd34afa | 1715 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1716 | tt_global_entry->roam_at = jiffies; |
1717 | } else | |
1718 | /* there is another entry, we can simply delete this | |
1719 | * one and can still use the other one. | |
1720 | */ | |
1d8ab8d3 LL |
1721 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1722 | orig_node, message); | |
db08e6e5 SW |
1723 | } |
1724 | ||
c018ad3d AQ |
1725 | /** |
1726 | * batadv_tt_global_del - remove a client from the global table | |
1727 | * @bat_priv: the bat priv with all the soft interface information | |
1728 | * @orig_node: an originator serving this client | |
1729 | * @addr: the mac address of the client | |
1730 | * @vid: VLAN identifier | |
1731 | * @message: a message explaining the reason for deleting the client to print | |
1732 | * for debugging purpose | |
1733 | * @roaming: true if the deletion has been triggered by a roaming event | |
1734 | */ | |
56303d34 SE |
1735 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1736 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1737 | const unsigned char *addr, unsigned short vid, |
a513088d | 1738 | const char *message, bool roaming) |
a73105b8 | 1739 | { |
170173bf | 1740 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1741 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1742 | |
c018ad3d | 1743 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1744 | if (!tt_global_entry) |
7683fdc1 | 1745 | goto out; |
a73105b8 | 1746 | |
db08e6e5 | 1747 | if (!roaming) { |
1d8ab8d3 LL |
1748 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1749 | orig_node, message); | |
db08e6e5 SW |
1750 | |
1751 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1752 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1753 | message); | |
db08e6e5 SW |
1754 | |
1755 | goto out; | |
1756 | } | |
92f90f56 SE |
1757 | |
1758 | /* if we are deleting a global entry due to a roam | |
1759 | * event, there are two possibilities: | |
db08e6e5 SW |
1760 | * 1) the client roamed from node A to node B => if there |
1761 | * is only one originator left for this client, we mark | |
acd34afa | 1762 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1763 | * wait for node B to claim it. In case of timeout |
1764 | * the entry is purged. | |
db08e6e5 SW |
1765 | * |
1766 | * If there are other originators left, we directly delete | |
1767 | * the originator. | |
92f90f56 | 1768 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1769 | * the global entry, since it is useless now. |
1770 | */ | |
a513088d | 1771 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1772 | tt_global_entry->common.addr, |
1773 | vid); | |
a513088d | 1774 | if (local_entry) { |
db08e6e5 | 1775 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1776 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1777 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1778 | } else |
1779 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1780 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1781 | orig_node, message); | |
92f90f56 | 1782 | |
cc47f66e | 1783 | out: |
7683fdc1 | 1784 | if (tt_global_entry) |
a513088d SE |
1785 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1786 | if (local_entry) | |
1787 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1788 | } |
1789 | ||
95fb130d AQ |
1790 | /** |
1791 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1792 | * given originator matching the provided vid | |
1793 | * @bat_priv: the bat priv with all the soft interface information | |
1794 | * @orig_node: the originator owning the entries to remove | |
1795 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1796 | * removed | |
1797 | * @message: debug message to print as "reason" | |
1798 | */ | |
56303d34 SE |
1799 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1800 | struct batadv_orig_node *orig_node, | |
95fb130d | 1801 | int32_t match_vid, |
56303d34 | 1802 | const char *message) |
c6c8fea2 | 1803 | { |
56303d34 SE |
1804 | struct batadv_tt_global_entry *tt_global; |
1805 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1806 | uint32_t i; |
807736f6 | 1807 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1808 | struct hlist_node *safe; |
a73105b8 | 1809 | struct hlist_head *head; |
7683fdc1 | 1810 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1811 | unsigned short vid; |
c6c8fea2 | 1812 | |
6e801494 SW |
1813 | if (!hash) |
1814 | return; | |
1815 | ||
a73105b8 AQ |
1816 | for (i = 0; i < hash->size; i++) { |
1817 | head = &hash->table[i]; | |
7683fdc1 | 1818 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1819 | |
7683fdc1 | 1820 | spin_lock_bh(list_lock); |
b67bfe0d | 1821 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1822 | head, hash_entry) { |
95fb130d AQ |
1823 | /* remove only matching entries */ |
1824 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1825 | continue; | |
1826 | ||
56303d34 SE |
1827 | tt_global = container_of(tt_common_entry, |
1828 | struct batadv_tt_global_entry, | |
1829 | common); | |
db08e6e5 | 1830 | |
1d8ab8d3 LL |
1831 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1832 | orig_node, message); | |
db08e6e5 | 1833 | |
56303d34 | 1834 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1835 | vid = tt_global->common.vid; |
39c75a51 | 1836 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1837 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1838 | tt_global->common.addr, | |
1839 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1840 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1841 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1842 | } |
a73105b8 | 1843 | } |
7683fdc1 | 1844 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1845 | } |
e17931d1 | 1846 | orig_node->capa_initialized &= ~BATADV_ORIG_CAPA_HAS_TT; |
c6c8fea2 SE |
1847 | } |
1848 | ||
30cfd02b AQ |
1849 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1850 | char **msg) | |
cc47f66e | 1851 | { |
30cfd02b AQ |
1852 | bool purge = false; |
1853 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1854 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1855 | |
30cfd02b AQ |
1856 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1857 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1858 | purge = true; | |
1859 | *msg = "Roaming timeout\n"; | |
1860 | } | |
42d0b044 | 1861 | |
30cfd02b AQ |
1862 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1863 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1864 | purge = true; | |
1865 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1866 | } |
30cfd02b AQ |
1867 | |
1868 | return purge; | |
42d0b044 SE |
1869 | } |
1870 | ||
30cfd02b | 1871 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1872 | { |
807736f6 | 1873 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1874 | struct hlist_head *head; |
b67bfe0d | 1875 | struct hlist_node *node_tmp; |
7683fdc1 | 1876 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1877 | uint32_t i; |
30cfd02b AQ |
1878 | char *msg = NULL; |
1879 | struct batadv_tt_common_entry *tt_common; | |
1880 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1881 | |
cc47f66e AQ |
1882 | for (i = 0; i < hash->size; i++) { |
1883 | head = &hash->table[i]; | |
7683fdc1 | 1884 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1885 | |
7683fdc1 | 1886 | spin_lock_bh(list_lock); |
b67bfe0d | 1887 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1888 | hash_entry) { |
1889 | tt_global = container_of(tt_common, | |
1890 | struct batadv_tt_global_entry, | |
1891 | common); | |
1892 | ||
1893 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1894 | continue; | |
1895 | ||
1896 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1897 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1898 | tt_global->common.addr, | |
1899 | BATADV_PRINT_VID(tt_global->common.vid), | |
1900 | msg); | |
30cfd02b | 1901 | |
b67bfe0d | 1902 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1903 | |
1904 | batadv_tt_global_entry_free_ref(tt_global); | |
1905 | } | |
7683fdc1 | 1906 | spin_unlock_bh(list_lock); |
cc47f66e | 1907 | } |
cc47f66e AQ |
1908 | } |
1909 | ||
56303d34 | 1910 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1911 | { |
5bf74e9c | 1912 | struct batadv_hashtable *hash; |
7683fdc1 | 1913 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1914 | struct batadv_tt_common_entry *tt_common_entry; |
1915 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1916 | struct hlist_node *node_tmp; |
7683fdc1 | 1917 | struct hlist_head *head; |
c90681b8 | 1918 | uint32_t i; |
7683fdc1 | 1919 | |
807736f6 | 1920 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1921 | return; |
1922 | ||
807736f6 | 1923 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1924 | |
1925 | for (i = 0; i < hash->size; i++) { | |
1926 | head = &hash->table[i]; | |
1927 | list_lock = &hash->list_locks[i]; | |
1928 | ||
1929 | spin_lock_bh(list_lock); | |
b67bfe0d | 1930 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1931 | head, hash_entry) { |
b67bfe0d | 1932 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1933 | tt_global = container_of(tt_common_entry, |
1934 | struct batadv_tt_global_entry, | |
1935 | common); | |
1936 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1937 | } |
1938 | spin_unlock_bh(list_lock); | |
1939 | } | |
1940 | ||
1a8eaf07 | 1941 | batadv_hash_destroy(hash); |
7683fdc1 | 1942 | |
807736f6 | 1943 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1944 | } |
1945 | ||
56303d34 SE |
1946 | static bool |
1947 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1948 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1949 | { |
1950 | bool ret = false; | |
1951 | ||
acd34afa SE |
1952 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1953 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1954 | ret = true; |
1955 | ||
2d2fcc2a AQ |
1956 | /* check if the two clients are marked as isolated */ |
1957 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
1958 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
1959 | ret = true; | |
1960 | ||
59b699cd AQ |
1961 | return ret; |
1962 | } | |
1963 | ||
c018ad3d AQ |
1964 | /** |
1965 | * batadv_transtable_search - get the mesh destination for a given client | |
1966 | * @bat_priv: the bat priv with all the soft interface information | |
1967 | * @src: mac address of the source client | |
1968 | * @addr: mac address of the destination client | |
1969 | * @vid: VLAN identifier | |
1970 | * | |
1971 | * Returns a pointer to the originator that was selected as destination in the | |
1972 | * mesh for contacting the client 'addr', NULL otherwise. | |
1973 | * In case of multiple originators serving the same client, the function returns | |
1974 | * the best one (best in terms of metric towards the destination node). | |
1975 | * | |
1976 | * If the two clients are AP isolated the function returns NULL. | |
1977 | */ | |
56303d34 SE |
1978 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1979 | const uint8_t *src, | |
c018ad3d AQ |
1980 | const uint8_t *addr, |
1981 | unsigned short vid) | |
c6c8fea2 | 1982 | { |
56303d34 SE |
1983 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1984 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1985 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1986 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 1987 | |
eceb22ae | 1988 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 1989 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
1990 | if (!tt_local_entry || |
1991 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1992 | goto out; |
1993 | } | |
7aadf889 | 1994 | |
c018ad3d | 1995 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 1996 | if (!tt_global_entry) |
7b36e8ee | 1997 | goto out; |
7aadf889 | 1998 | |
3d393e47 | 1999 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2000 | * isolation |
2001 | */ | |
a513088d SE |
2002 | if (tt_local_entry && |
2003 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2004 | goto out; |
2005 | ||
db08e6e5 | 2006 | rcu_read_lock(); |
4627456a | 2007 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2008 | /* found anything? */ |
981d8900 SE |
2009 | if (best_entry) |
2010 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
2011 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
2012 | orig_node = NULL; | |
2013 | rcu_read_unlock(); | |
981d8900 | 2014 | |
7b36e8ee | 2015 | out: |
3d393e47 | 2016 | if (tt_global_entry) |
a513088d | 2017 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 2018 | if (tt_local_entry) |
a513088d | 2019 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 2020 | |
7b36e8ee | 2021 | return orig_node; |
c6c8fea2 | 2022 | } |
a73105b8 | 2023 | |
ced72933 AQ |
2024 | /** |
2025 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2026 | * to the given orig_node | |
2027 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2028 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2029 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2030 | * |
2031 | * This function computes the checksum for the global table corresponding to a | |
2032 | * specific originator. In particular, the checksum is computed as follows: For | |
2033 | * each client connected to the originator the CRC32C of the MAC address and the | |
2034 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2035 | * together. | |
2036 | * | |
2037 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2038 | * produce a unique hash of the table, but since the order which is used to feed | |
2039 | * the CRC32C function affects the result and since every node in the network | |
2040 | * probably sorts the clients differently, the hash function cannot be directly | |
2041 | * computed over the entire table. Hence the CRC32C is used only on | |
2042 | * the single client entry, while all the results are then xor'ed together | |
2043 | * because the XOR operation can combine them all while trying to reduce the | |
2044 | * noise as much as possible. | |
2045 | * | |
2046 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
2047 | */ |
2048 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
7ea7b4a1 AQ |
2049 | struct batadv_orig_node *orig_node, |
2050 | unsigned short vid) | |
a73105b8 | 2051 | { |
807736f6 | 2052 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2053 | struct batadv_tt_common_entry *tt_common; |
2054 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2055 | struct hlist_head *head; |
0ffa9e8d | 2056 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2057 | uint8_t flags; |
a30e22ca | 2058 | __be16 tmp_vid; |
a73105b8 AQ |
2059 | |
2060 | for (i = 0; i < hash->size; i++) { | |
2061 | head = &hash->table[i]; | |
2062 | ||
2063 | rcu_read_lock(); | |
b67bfe0d | 2064 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2065 | tt_global = container_of(tt_common, |
2066 | struct batadv_tt_global_entry, | |
2067 | common); | |
7ea7b4a1 AQ |
2068 | /* compute the CRC only for entries belonging to the |
2069 | * VLAN identified by the vid passed as parameter | |
2070 | */ | |
2071 | if (tt_common->vid != vid) | |
2072 | continue; | |
2073 | ||
db08e6e5 SW |
2074 | /* Roaming clients are in the global table for |
2075 | * consistency only. They don't have to be | |
2076 | * taken into account while computing the | |
2077 | * global crc | |
2078 | */ | |
acd34afa | 2079 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2080 | continue; |
30cfd02b AQ |
2081 | /* Temporary clients have not been announced yet, so |
2082 | * they have to be skipped while computing the global | |
2083 | * crc | |
2084 | */ | |
2085 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2086 | continue; | |
db08e6e5 SW |
2087 | |
2088 | /* find out if this global entry is announced by this | |
2089 | * originator | |
2090 | */ | |
56303d34 | 2091 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2092 | orig_node)) |
db08e6e5 SW |
2093 | continue; |
2094 | ||
a30e22ca AQ |
2095 | /* use network order to read the VID: this ensures that |
2096 | * every node reads the bytes in the same order. | |
2097 | */ | |
2098 | tmp_vid = htons(tt_common->vid); | |
2099 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2100 | |
2101 | /* compute the CRC on flags that have to be kept in sync | |
2102 | * among nodes | |
2103 | */ | |
2104 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2105 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2106 | ||
0ffa9e8d | 2107 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2108 | } |
2109 | rcu_read_unlock(); | |
2110 | } | |
2111 | ||
ced72933 | 2112 | return crc; |
a73105b8 AQ |
2113 | } |
2114 | ||
ced72933 AQ |
2115 | /** |
2116 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2117 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2118 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2119 | * |
2120 | * For details about the computation, please refer to the documentation for | |
2121 | * batadv_tt_global_crc(). | |
2122 | * | |
2123 | * Returns the checksum of the local table | |
ced72933 | 2124 | */ |
7ea7b4a1 AQ |
2125 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2126 | unsigned short vid) | |
a73105b8 | 2127 | { |
807736f6 | 2128 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2129 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2130 | struct hlist_head *head; |
0ffa9e8d | 2131 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2132 | uint8_t flags; |
a30e22ca | 2133 | __be16 tmp_vid; |
a73105b8 AQ |
2134 | |
2135 | for (i = 0; i < hash->size; i++) { | |
2136 | head = &hash->table[i]; | |
2137 | ||
2138 | rcu_read_lock(); | |
b67bfe0d | 2139 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2140 | /* compute the CRC only for entries belonging to the |
2141 | * VLAN identified by vid | |
2142 | */ | |
2143 | if (tt_common->vid != vid) | |
2144 | continue; | |
2145 | ||
058d0e26 | 2146 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2147 | * account while computing the CRC |
2148 | */ | |
acd34afa | 2149 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2150 | continue; |
ced72933 | 2151 | |
a30e22ca AQ |
2152 | /* use network order to read the VID: this ensures that |
2153 | * every node reads the bytes in the same order. | |
2154 | */ | |
2155 | tmp_vid = htons(tt_common->vid); | |
2156 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2157 | |
2158 | /* compute the CRC on flags that have to be kept in sync | |
2159 | * among nodes | |
2160 | */ | |
2161 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2162 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2163 | ||
0ffa9e8d | 2164 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2165 | } |
a73105b8 AQ |
2166 | rcu_read_unlock(); |
2167 | } | |
2168 | ||
ced72933 | 2169 | return crc; |
a73105b8 AQ |
2170 | } |
2171 | ||
56303d34 | 2172 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2173 | { |
56303d34 | 2174 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2175 | |
807736f6 | 2176 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2177 | |
807736f6 | 2178 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
2179 | list_del(&node->list); |
2180 | kfree(node); | |
2181 | } | |
2182 | ||
807736f6 | 2183 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2184 | } |
2185 | ||
56303d34 SE |
2186 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2187 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
2188 | const void *tt_buff, |
2189 | uint16_t tt_buff_len) | |
a73105b8 | 2190 | { |
a73105b8 | 2191 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2192 | * last OGM (the OGM could carry no changes) |
2193 | */ | |
a73105b8 AQ |
2194 | spin_lock_bh(&orig_node->tt_buff_lock); |
2195 | if (tt_buff_len > 0) { | |
2196 | kfree(orig_node->tt_buff); | |
2197 | orig_node->tt_buff_len = 0; | |
2198 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2199 | if (orig_node->tt_buff) { | |
2200 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2201 | orig_node->tt_buff_len = tt_buff_len; | |
2202 | } | |
2203 | } | |
2204 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2205 | } | |
2206 | ||
56303d34 | 2207 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2208 | { |
56303d34 | 2209 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2210 | |
807736f6 SE |
2211 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2212 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
2213 | if (batadv_has_timed_out(node->issued_at, |
2214 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
2215 | list_del(&node->list); |
2216 | kfree(node); | |
2217 | } | |
2218 | } | |
807736f6 | 2219 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2220 | } |
2221 | ||
2222 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
2223 | * has already been issued for this orig_node, NULL otherwise |
2224 | */ | |
56303d34 SE |
2225 | static struct batadv_tt_req_node * |
2226 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
2227 | struct batadv_orig_node *orig_node) | |
a73105b8 | 2228 | { |
56303d34 | 2229 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2230 | |
807736f6 SE |
2231 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2232 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
2233 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2234 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2235 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2236 | goto unlock; |
2237 | } | |
2238 | ||
2239 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2240 | if (!tt_req_node) | |
2241 | goto unlock; | |
2242 | ||
8fdd0153 | 2243 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2244 | tt_req_node->issued_at = jiffies; |
2245 | ||
807736f6 | 2246 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2247 | unlock: |
807736f6 | 2248 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2249 | return tt_req_node; |
2250 | } | |
2251 | ||
335fbe0f ML |
2252 | /** |
2253 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2254 | * @entry_ptr: to be checked local tt entry | |
2255 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2256 | * | |
2257 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2258 | */ | |
2259 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2260 | { |
56303d34 | 2261 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2262 | |
acd34afa | 2263 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2264 | return 0; |
2265 | return 1; | |
2266 | } | |
2267 | ||
a513088d SE |
2268 | static int batadv_tt_global_valid(const void *entry_ptr, |
2269 | const void *data_ptr) | |
a73105b8 | 2270 | { |
56303d34 SE |
2271 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2272 | const struct batadv_tt_global_entry *tt_global_entry; | |
2273 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2274 | |
30cfd02b AQ |
2275 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2276 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2277 | return 0; |
2278 | ||
56303d34 SE |
2279 | tt_global_entry = container_of(tt_common_entry, |
2280 | struct batadv_tt_global_entry, | |
48100bac AQ |
2281 | common); |
2282 | ||
a513088d | 2283 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2284 | } |
2285 | ||
335fbe0f | 2286 | /** |
7ea7b4a1 AQ |
2287 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2288 | * specified tt hash | |
335fbe0f ML |
2289 | * @bat_priv: the bat priv with all the soft interface information |
2290 | * @hash: hash table containing the tt entries | |
2291 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2292 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2293 | * @valid_cb: function to filter tt change entries |
2294 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2295 | */ |
7ea7b4a1 AQ |
2296 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2297 | struct batadv_hashtable *hash, | |
2298 | void *tvlv_buff, uint16_t tt_len, | |
2299 | int (*valid_cb)(const void *, const void *), | |
2300 | void *cb_data) | |
a73105b8 | 2301 | { |
56303d34 | 2302 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2303 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2304 | struct hlist_head *head; |
335fbe0f | 2305 | uint16_t tt_tot, tt_num_entries = 0; |
c90681b8 | 2306 | uint32_t i; |
a73105b8 | 2307 | |
298e6e68 | 2308 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2309 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2310 | |
2311 | rcu_read_lock(); | |
2312 | for (i = 0; i < hash->size; i++) { | |
2313 | head = &hash->table[i]; | |
2314 | ||
b67bfe0d | 2315 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2316 | head, hash_entry) { |
335fbe0f | 2317 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2318 | break; |
2319 | ||
48100bac | 2320 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2321 | continue; |
2322 | ||
8fdd0153 | 2323 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2324 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2325 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2326 | memset(tt_change->reserved, 0, |
2327 | sizeof(tt_change->reserved)); | |
a73105b8 | 2328 | |
335fbe0f | 2329 | tt_num_entries++; |
a73105b8 AQ |
2330 | tt_change++; |
2331 | } | |
2332 | } | |
2333 | rcu_read_unlock(); | |
7ea7b4a1 | 2334 | } |
a73105b8 | 2335 | |
7ea7b4a1 AQ |
2336 | /** |
2337 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2338 | * @orig_node: originator for which the CRCs have to be checked | |
2339 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2340 | * @num_vlan: number of tvlv VLAN entries | |
2341 | * @create: if true, create VLAN objects if not found | |
2342 | * | |
2343 | * Return true if all the received CRCs match the locally stored ones, false | |
2344 | * otherwise | |
2345 | */ | |
2346 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2347 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2348 | uint16_t num_vlan) | |
2349 | { | |
2350 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2351 | struct batadv_orig_node_vlan *vlan; | |
91c2b1a9 | 2352 | uint32_t crc; |
7ea7b4a1 AQ |
2353 | int i; |
2354 | ||
2355 | /* check if each received CRC matches the locally stored one */ | |
2356 | for (i = 0; i < num_vlan; i++) { | |
2357 | tt_vlan_tmp = tt_vlan + i; | |
2358 | ||
2359 | /* if orig_node is a backbone node for this VLAN, don't check | |
2360 | * the CRC as we ignore all the global entries over it | |
2361 | */ | |
2362 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2363 | orig_node->orig, |
2364 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2365 | continue; |
2366 | ||
2367 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2368 | ntohs(tt_vlan_tmp->vid)); | |
2369 | if (!vlan) | |
2370 | return false; | |
2371 | ||
91c2b1a9 AQ |
2372 | crc = vlan->tt.crc; |
2373 | batadv_orig_node_vlan_free_ref(vlan); | |
2374 | ||
2375 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2376 | return false; |
2377 | } | |
2378 | ||
2379 | return true; | |
2380 | } | |
2381 | ||
2382 | /** | |
2383 | * batadv_tt_local_update_crc - update all the local CRCs | |
2384 | * @bat_priv: the bat priv with all the soft interface information | |
2385 | */ | |
2386 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2387 | { | |
2388 | struct batadv_softif_vlan *vlan; | |
2389 | ||
2390 | /* recompute the global CRC for each VLAN */ | |
2391 | rcu_read_lock(); | |
2392 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2393 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2394 | } | |
2395 | rcu_read_unlock(); | |
2396 | } | |
2397 | ||
2398 | /** | |
2399 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2400 | * @bat_priv: the bat priv with all the soft interface information | |
2401 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2402 | */ | |
2403 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2404 | struct batadv_orig_node *orig_node) | |
2405 | { | |
2406 | struct batadv_orig_node_vlan *vlan; | |
2407 | uint32_t crc; | |
2408 | ||
2409 | /* recompute the global CRC for each VLAN */ | |
2410 | rcu_read_lock(); | |
2411 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
2412 | /* if orig_node is a backbone node for this VLAN, don't compute | |
2413 | * the CRC as we ignore all the global entries over it | |
2414 | */ | |
cfd4f757 AQ |
2415 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2416 | vlan->vid)) | |
7ea7b4a1 AQ |
2417 | continue; |
2418 | ||
2419 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2420 | vlan->tt.crc = crc; | |
2421 | } | |
2422 | rcu_read_unlock(); | |
a73105b8 AQ |
2423 | } |
2424 | ||
ced72933 AQ |
2425 | /** |
2426 | * batadv_send_tt_request - send a TT Request message to a given node | |
2427 | * @bat_priv: the bat priv with all the soft interface information | |
2428 | * @dst_orig_node: the destination of the message | |
2429 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2430 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2431 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2432 | * @full_table: ask for the entire translation table if true, while only for the |
2433 | * last TT diff otherwise | |
2434 | */ | |
56303d34 SE |
2435 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2436 | struct batadv_orig_node *dst_orig_node, | |
7ea7b4a1 AQ |
2437 | uint8_t ttvn, |
2438 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2439 | uint16_t num_vlan, bool full_table) | |
a73105b8 | 2440 | { |
335fbe0f | 2441 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2442 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2443 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2444 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2445 | bool ret = false; |
7ea7b4a1 | 2446 | int i, size; |
a73105b8 | 2447 | |
e5d89254 | 2448 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2449 | if (!primary_if) |
2450 | goto out; | |
2451 | ||
2452 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2453 | * reply from the same orig_node yet |
2454 | */ | |
a513088d | 2455 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
2456 | if (!tt_req_node) |
2457 | goto out; | |
2458 | ||
7ea7b4a1 AQ |
2459 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2460 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2461 | if (!tvlv_tt_data) |
a73105b8 AQ |
2462 | goto out; |
2463 | ||
335fbe0f ML |
2464 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2465 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2466 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2467 | ||
2468 | /* send all the CRCs within the request. This is needed by intermediate | |
2469 | * nodes to ensure they have the correct table before replying | |
2470 | */ | |
2471 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2472 | for (i = 0; i < num_vlan; i++) { | |
2473 | tt_vlan_req->vid = tt_vlan->vid; | |
2474 | tt_vlan_req->crc = tt_vlan->crc; | |
2475 | ||
2476 | tt_vlan_req++; | |
2477 | tt_vlan++; | |
2478 | } | |
a73105b8 AQ |
2479 | |
2480 | if (full_table) | |
335fbe0f | 2481 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2482 | |
bb351ba0 | 2483 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2484 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2485 | |
d69909d2 | 2486 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2487 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2488 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2489 | tvlv_tt_data, size); |
335fbe0f | 2490 | ret = true; |
a73105b8 AQ |
2491 | |
2492 | out: | |
a73105b8 | 2493 | if (primary_if) |
e5d89254 | 2494 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2495 | if (ret && tt_req_node) { |
807736f6 | 2496 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2497 | list_del(&tt_req_node->list); |
807736f6 | 2498 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2499 | kfree(tt_req_node); |
2500 | } | |
335fbe0f | 2501 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2502 | return ret; |
2503 | } | |
2504 | ||
335fbe0f ML |
2505 | /** |
2506 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2507 | * node's translation table | |
2508 | * @bat_priv: the bat priv with all the soft interface information | |
2509 | * @tt_data: tt data containing the tt request information | |
2510 | * @req_src: mac address of tt request sender | |
2511 | * @req_dst: mac address of tt request recipient | |
2512 | * | |
2513 | * Returns true if tt request reply was sent, false otherwise. | |
2514 | */ | |
2515 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2516 | struct batadv_tvlv_tt_data *tt_data, | |
2517 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2518 | { |
170173bf | 2519 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2520 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2521 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2522 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2523 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2524 | bool ret = false, full_table; |
7ea7b4a1 AQ |
2525 | uint8_t orig_ttvn, req_ttvn; |
2526 | uint16_t tvlv_len; | |
2527 | int32_t tt_len; | |
a73105b8 | 2528 | |
39c75a51 | 2529 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2530 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f ML |
2531 | req_src, tt_data->ttvn, req_dst, |
2532 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
2533 | |
2534 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2535 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2536 | if (!req_dst_orig_node) |
2537 | goto out; | |
2538 | ||
335fbe0f | 2539 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2540 | if (!res_dst_orig_node) |
2541 | goto out; | |
2542 | ||
a73105b8 | 2543 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2544 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2545 | |
7ea7b4a1 | 2546 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2547 | /* this node doesn't have the requested data */ |
a73105b8 | 2548 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2549 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2550 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2551 | goto out; |
2552 | ||
015758d0 | 2553 | /* If the full table has been explicitly requested */ |
335fbe0f | 2554 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2555 | !req_dst_orig_node->tt_buff) |
2556 | full_table = true; | |
2557 | else | |
2558 | full_table = false; | |
2559 | ||
335fbe0f ML |
2560 | /* TT fragmentation hasn't been implemented yet, so send as many |
2561 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2562 | */ |
a73105b8 AQ |
2563 | if (!full_table) { |
2564 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2565 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2566 | |
7ea7b4a1 AQ |
2567 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2568 | &tvlv_tt_data, | |
2569 | &tt_change, | |
2570 | &tt_len); | |
2571 | if (!tt_len) | |
a73105b8 AQ |
2572 | goto unlock; |
2573 | ||
a73105b8 | 2574 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2575 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2576 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2577 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2578 | } else { | |
7ea7b4a1 AQ |
2579 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2580 | * in the initial part | |
2581 | */ | |
2582 | tt_len = -1; | |
2583 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2584 | &tvlv_tt_data, | |
2585 | &tt_change, | |
2586 | &tt_len); | |
2587 | if (!tt_len) | |
a73105b8 | 2588 | goto out; |
7ea7b4a1 AQ |
2589 | |
2590 | /* fill the rest of the tvlv with the real TT entries */ | |
2591 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2592 | tt_change, tt_len, | |
2593 | batadv_tt_global_valid, | |
2594 | req_dst_orig_node); | |
a73105b8 AQ |
2595 | } |
2596 | ||
a19d3d85 ML |
2597 | /* Don't send the response, if larger than fragmented packet. */ |
2598 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2599 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2600 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2601 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2602 | res_dst_orig_node->orig); | |
2603 | goto out; | |
2604 | } | |
2605 | ||
335fbe0f ML |
2606 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2607 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2608 | |
2609 | if (full_table) | |
335fbe0f | 2610 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2611 | |
39c75a51 | 2612 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2613 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2614 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2615 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2616 | |
d69909d2 | 2617 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2618 | |
335fbe0f | 2619 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2620 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2621 | tvlv_len); | |
e91ecfc6 | 2622 | |
335fbe0f | 2623 | ret = true; |
a73105b8 AQ |
2624 | goto out; |
2625 | ||
2626 | unlock: | |
2627 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2628 | ||
2629 | out: | |
2630 | if (res_dst_orig_node) | |
7d211efc | 2631 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2632 | if (req_dst_orig_node) |
7d211efc | 2633 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2634 | kfree(tvlv_tt_data); |
a73105b8 | 2635 | return ret; |
a73105b8 | 2636 | } |
96412690 | 2637 | |
335fbe0f ML |
2638 | /** |
2639 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2640 | * translation table | |
2641 | * @bat_priv: the bat priv with all the soft interface information | |
2642 | * @tt_data: tt data containing the tt request information | |
2643 | * @req_src: mac address of tt request sender | |
2644 | * | |
2645 | * Returns true if tt request reply was sent, false otherwise. | |
2646 | */ | |
2647 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2648 | struct batadv_tvlv_tt_data *tt_data, | |
2649 | uint8_t *req_src) | |
a73105b8 | 2650 | { |
335fbe0f | 2651 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2652 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2653 | struct batadv_tvlv_tt_change *tt_change; |
2654 | struct batadv_orig_node *orig_node; | |
335fbe0f | 2655 | uint8_t my_ttvn, req_ttvn; |
7ea7b4a1 | 2656 | uint16_t tvlv_len; |
a73105b8 | 2657 | bool full_table; |
7ea7b4a1 | 2658 | int32_t tt_len; |
a73105b8 | 2659 | |
39c75a51 | 2660 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2661 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f ML |
2662 | req_src, tt_data->ttvn, |
2663 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2664 | |
a70a9aa9 | 2665 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2666 | |
807736f6 | 2667 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2668 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2669 | |
335fbe0f | 2670 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2671 | if (!orig_node) |
2672 | goto out; | |
2673 | ||
e5d89254 | 2674 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2675 | if (!primary_if) |
2676 | goto out; | |
2677 | ||
2678 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2679 | * is too big send the whole local translation table |
2680 | */ | |
335fbe0f | 2681 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2682 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2683 | full_table = true; |
2684 | else | |
2685 | full_table = false; | |
2686 | ||
335fbe0f ML |
2687 | /* TT fragmentation hasn't been implemented yet, so send as many |
2688 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2689 | */ |
a73105b8 | 2690 | if (!full_table) { |
807736f6 | 2691 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2692 | |
7ea7b4a1 AQ |
2693 | tt_len = bat_priv->tt.last_changeset_len; |
2694 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2695 | &tvlv_tt_data, | |
2696 | &tt_change, | |
2697 | &tt_len); | |
2698 | if (!tt_len) | |
a73105b8 AQ |
2699 | goto unlock; |
2700 | ||
335fbe0f | 2701 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2702 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2703 | bat_priv->tt.last_changeset_len); |
2704 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2705 | } else { |
335fbe0f ML |
2706 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
2707 | ||
7ea7b4a1 AQ |
2708 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2709 | * in the initial part | |
2710 | */ | |
2711 | tt_len = -1; | |
2712 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2713 | &tvlv_tt_data, | |
2714 | &tt_change, | |
2715 | &tt_len); | |
2716 | if (!tt_len) | |
a73105b8 | 2717 | goto out; |
7ea7b4a1 AQ |
2718 | |
2719 | /* fill the rest of the tvlv with the real TT entries */ | |
2720 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2721 | tt_change, tt_len, | |
2722 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2723 | } |
2724 | ||
335fbe0f ML |
2725 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2726 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2727 | |
2728 | if (full_table) | |
335fbe0f | 2729 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2730 | |
39c75a51 | 2731 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2732 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2733 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2734 | |
d69909d2 | 2735 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2736 | |
335fbe0f | 2737 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2738 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2739 | tvlv_len); | |
335fbe0f | 2740 | |
a73105b8 AQ |
2741 | goto out; |
2742 | ||
2743 | unlock: | |
807736f6 | 2744 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2745 | out: |
a70a9aa9 | 2746 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2747 | if (orig_node) |
7d211efc | 2748 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2749 | if (primary_if) |
e5d89254 | 2750 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2751 | kfree(tvlv_tt_data); |
2752 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2753 | return true; |
2754 | } | |
2755 | ||
335fbe0f ML |
2756 | /** |
2757 | * batadv_send_tt_response - send reply to tt request | |
2758 | * @bat_priv: the bat priv with all the soft interface information | |
2759 | * @tt_data: tt data containing the tt request information | |
2760 | * @req_src: mac address of tt request sender | |
2761 | * @req_dst: mac address of tt request recipient | |
2762 | * | |
2763 | * Returns true if tt request reply was sent, false otherwise. | |
2764 | */ | |
2765 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2766 | struct batadv_tvlv_tt_data *tt_data, | |
2767 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2768 | { |
cfd4f757 | 2769 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2770 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
2771 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
2772 | req_dst); | |
a73105b8 AQ |
2773 | } |
2774 | ||
56303d34 SE |
2775 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2776 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2777 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2778 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2779 | { |
2780 | int i; | |
a513088d | 2781 | int roams; |
a73105b8 AQ |
2782 | |
2783 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2784 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2785 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2786 | batadv_tt_global_del(bat_priv, orig_node, |
2787 | (tt_change + i)->addr, | |
c018ad3d | 2788 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2789 | "tt removed by changes", |
2790 | roams); | |
08c36d3e | 2791 | } else { |
08c36d3e | 2792 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2793 | (tt_change + i)->addr, |
c018ad3d | 2794 | ntohs((tt_change + i)->vid), |
d4f44692 | 2795 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2796 | /* In case of problem while storing a |
2797 | * global_entry, we stop the updating | |
2798 | * procedure without committing the | |
2799 | * ttvn change. This will avoid to send | |
2800 | * corrupted data on tt_request | |
2801 | */ | |
2802 | return; | |
08c36d3e | 2803 | } |
a73105b8 | 2804 | } |
e17931d1 | 2805 | orig_node->capa_initialized |= BATADV_ORIG_CAPA_HAS_TT; |
a73105b8 AQ |
2806 | } |
2807 | ||
56303d34 | 2808 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 AQ |
2809 | struct batadv_tvlv_tt_change *tt_change, |
2810 | uint8_t ttvn, uint8_t *resp_src, | |
2811 | uint16_t num_entries) | |
a73105b8 | 2812 | { |
170173bf | 2813 | struct batadv_orig_node *orig_node; |
a73105b8 | 2814 | |
335fbe0f | 2815 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2816 | if (!orig_node) |
2817 | goto out; | |
2818 | ||
2819 | /* Purge the old table first.. */ | |
95fb130d AQ |
2820 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2821 | "Received full table"); | |
a73105b8 | 2822 | |
7ea7b4a1 AQ |
2823 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2824 | ttvn); | |
a73105b8 AQ |
2825 | |
2826 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2827 | kfree(orig_node->tt_buff); | |
2828 | orig_node->tt_buff_len = 0; | |
2829 | orig_node->tt_buff = NULL; | |
2830 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2831 | ||
7ea7b4a1 | 2832 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2833 | |
2834 | out: | |
2835 | if (orig_node) | |
7d211efc | 2836 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2837 | } |
2838 | ||
56303d34 SE |
2839 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2840 | struct batadv_orig_node *orig_node, | |
a513088d | 2841 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2842 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2843 | { |
a513088d SE |
2844 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2845 | tt_num_changes, ttvn); | |
a73105b8 | 2846 | |
e8cf234a AQ |
2847 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2848 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2849 | atomic_set(&orig_node->last_ttvn, ttvn); |
2850 | } | |
2851 | ||
c018ad3d AQ |
2852 | /** |
2853 | * batadv_is_my_client - check if a client is served by the local node | |
2854 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 2855 | * @addr: the mac address of the client to check |
c018ad3d AQ |
2856 | * @vid: VLAN identifier |
2857 | * | |
2858 | * Returns true if the client is served by this node, false otherwise. | |
2859 | */ | |
2860 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2861 | unsigned short vid) | |
a73105b8 | 2862 | { |
170173bf | 2863 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2864 | bool ret = false; |
a73105b8 | 2865 | |
c018ad3d | 2866 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2867 | if (!tt_local_entry) |
2868 | goto out; | |
058d0e26 | 2869 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2870 | * consistency purpose) |
2871 | */ | |
7c1fd91d AQ |
2872 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2873 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2874 | goto out; |
7683fdc1 AQ |
2875 | ret = true; |
2876 | out: | |
a73105b8 | 2877 | if (tt_local_entry) |
a513088d | 2878 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2879 | return ret; |
a73105b8 AQ |
2880 | } |
2881 | ||
335fbe0f ML |
2882 | /** |
2883 | * batadv_handle_tt_response - process incoming tt reply | |
2884 | * @bat_priv: the bat priv with all the soft interface information | |
2885 | * @tt_data: tt data containing the tt request information | |
2886 | * @resp_src: mac address of tt reply sender | |
2887 | * @num_entries: number of tt change entries appended to the tt data | |
2888 | */ | |
2889 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2890 | struct batadv_tvlv_tt_data *tt_data, | |
2891 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2892 | { |
56303d34 SE |
2893 | struct batadv_tt_req_node *node, *safe; |
2894 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2895 | struct batadv_tvlv_tt_change *tt_change; |
7ea7b4a1 AQ |
2896 | uint8_t *tvlv_ptr = (uint8_t *)tt_data; |
2897 | uint16_t change_offset; | |
a73105b8 | 2898 | |
39c75a51 | 2899 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2900 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f ML |
2901 | resp_src, tt_data->ttvn, num_entries, |
2902 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2903 | |
335fbe0f | 2904 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2905 | if (!orig_node) |
2906 | goto out; | |
2907 | ||
a70a9aa9 AQ |
2908 | spin_lock_bh(&orig_node->tt_lock); |
2909 | ||
7ea7b4a1 AQ |
2910 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2911 | change_offset *= ntohs(tt_data->num_vlan); | |
2912 | change_offset += sizeof(*tt_data); | |
2913 | tvlv_ptr += change_offset; | |
2914 | ||
2915 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2916 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2917 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2918 | resp_src, num_entries); | |
96412690 | 2919 | } else { |
335fbe0f ML |
2920 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2921 | tt_data->ttvn, tt_change); | |
96412690 | 2922 | } |
a73105b8 | 2923 | |
a70a9aa9 | 2924 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2925 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2926 | |
2927 | spin_unlock_bh(&orig_node->tt_lock); | |
2928 | ||
a73105b8 | 2929 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2930 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2931 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2932 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2933 | continue; |
2934 | list_del(&node->list); | |
2935 | kfree(node); | |
2936 | } | |
7ea7b4a1 | 2937 | |
807736f6 | 2938 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2939 | out: |
2940 | if (orig_node) | |
7d211efc | 2941 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2942 | } |
2943 | ||
56303d34 | 2944 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2945 | { |
56303d34 | 2946 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2947 | |
807736f6 | 2948 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2949 | |
807736f6 | 2950 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2951 | list_del(&node->list); |
2952 | kfree(node); | |
2953 | } | |
2954 | ||
807736f6 | 2955 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2956 | } |
2957 | ||
56303d34 | 2958 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2959 | { |
56303d34 | 2960 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2961 | |
807736f6 SE |
2962 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2963 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2964 | if (!batadv_has_timed_out(node->first_time, |
2965 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2966 | continue; |
2967 | ||
2968 | list_del(&node->list); | |
2969 | kfree(node); | |
2970 | } | |
807736f6 | 2971 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2972 | } |
2973 | ||
2974 | /* This function checks whether the client already reached the | |
2975 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2976 | * will not be sent. | |
2977 | * | |
9cfc7bd6 SE |
2978 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2979 | */ | |
56303d34 | 2980 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2981 | uint8_t *client) |
cc47f66e | 2982 | { |
56303d34 | 2983 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2984 | bool ret = false; |
2985 | ||
807736f6 | 2986 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2987 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2988 | * reply from the same orig_node yet |
2989 | */ | |
807736f6 | 2990 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2991 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2992 | continue; |
2993 | ||
1eda58bf | 2994 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2995 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2996 | continue; |
2997 | ||
3e34819e | 2998 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2999 | /* Sorry, you roamed too many times! */ |
3000 | goto unlock; | |
3001 | ret = true; | |
3002 | break; | |
3003 | } | |
3004 | ||
3005 | if (!ret) { | |
3006 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
3007 | if (!tt_roam_node) | |
3008 | goto unlock; | |
3009 | ||
3010 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3011 | atomic_set(&tt_roam_node->counter, |
3012 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3013 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3014 | |
807736f6 | 3015 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3016 | ret = true; |
3017 | } | |
3018 | ||
3019 | unlock: | |
807736f6 | 3020 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3021 | return ret; |
3022 | } | |
3023 | ||
c018ad3d AQ |
3024 | /** |
3025 | * batadv_send_roam_adv - send a roaming advertisement message | |
3026 | * @bat_priv: the bat priv with all the soft interface information | |
3027 | * @client: mac address of the roaming client | |
3028 | * @vid: VLAN identifier | |
3029 | * @orig_node: message destination | |
3030 | * | |
3031 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3032 | * client. This is done to inform the node that from now on all traffic destined | |
3033 | * for this particular roamed client has to be forwarded to the sender of the | |
3034 | * roaming message. | |
3035 | */ | |
56303d34 | 3036 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 3037 | unsigned short vid, |
56303d34 | 3038 | struct batadv_orig_node *orig_node) |
cc47f66e | 3039 | { |
56303d34 | 3040 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3041 | struct batadv_tvlv_roam_adv tvlv_roam; |
3042 | ||
3043 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3044 | if (!primary_if) | |
3045 | goto out; | |
cc47f66e AQ |
3046 | |
3047 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3048 | * already roamed to us too many times |
3049 | */ | |
a513088d | 3050 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3051 | goto out; |
3052 | ||
39c75a51 | 3053 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3054 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3055 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3056 | |
d69909d2 | 3057 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3058 | |
122edaa0 | 3059 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3060 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3061 | |
3062 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3063 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3064 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3065 | |
3066 | out: | |
122edaa0 ML |
3067 | if (primary_if) |
3068 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
3069 | } |
3070 | ||
a513088d | 3071 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3072 | { |
56303d34 | 3073 | struct delayed_work *delayed_work; |
807736f6 | 3074 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3075 | struct batadv_priv *bat_priv; |
3076 | ||
3077 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3078 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3079 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3080 | |
a19d3d85 | 3081 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3082 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3083 | batadv_tt_req_purge(bat_priv); |
3084 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3085 | |
72414442 AQ |
3086 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3087 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3088 | } |
cc47f66e | 3089 | |
56303d34 | 3090 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3091 | { |
e1bf0c14 ML |
3092 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3093 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3094 | ||
807736f6 | 3095 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3096 | |
a513088d SE |
3097 | batadv_tt_local_table_free(bat_priv); |
3098 | batadv_tt_global_table_free(bat_priv); | |
3099 | batadv_tt_req_list_free(bat_priv); | |
3100 | batadv_tt_changes_list_free(bat_priv); | |
3101 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3102 | |
807736f6 | 3103 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3104 | } |
058d0e26 | 3105 | |
7ea7b4a1 AQ |
3106 | /** |
3107 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3108 | * table and possibly count them in the TT size | |
3109 | * @bat_priv: the bat priv with all the soft interface information | |
3110 | * @flags: the flag to switch | |
3111 | * @enable: whether to set or unset the flag | |
3112 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3113 | */ |
7ea7b4a1 AQ |
3114 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, |
3115 | uint16_t flags, bool enable, bool count) | |
058d0e26 | 3116 | { |
7ea7b4a1 AQ |
3117 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3118 | struct batadv_tt_common_entry *tt_common_entry; | |
697f2531 | 3119 | uint16_t changed_num = 0; |
058d0e26 | 3120 | struct hlist_head *head; |
7ea7b4a1 | 3121 | uint32_t i; |
058d0e26 AQ |
3122 | |
3123 | if (!hash) | |
7ea7b4a1 | 3124 | return; |
058d0e26 AQ |
3125 | |
3126 | for (i = 0; i < hash->size; i++) { | |
3127 | head = &hash->table[i]; | |
3128 | ||
3129 | rcu_read_lock(); | |
b67bfe0d | 3130 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3131 | head, hash_entry) { |
697f2531 AQ |
3132 | if (enable) { |
3133 | if ((tt_common_entry->flags & flags) == flags) | |
3134 | continue; | |
3135 | tt_common_entry->flags |= flags; | |
3136 | } else { | |
3137 | if (!(tt_common_entry->flags & flags)) | |
3138 | continue; | |
3139 | tt_common_entry->flags &= ~flags; | |
3140 | } | |
3141 | changed_num++; | |
7ea7b4a1 AQ |
3142 | |
3143 | if (!count) | |
3144 | continue; | |
3145 | ||
3146 | batadv_tt_local_size_inc(bat_priv, | |
3147 | tt_common_entry->vid); | |
058d0e26 AQ |
3148 | } |
3149 | rcu_read_unlock(); | |
3150 | } | |
058d0e26 AQ |
3151 | } |
3152 | ||
acd34afa | 3153 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3154 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3155 | { |
807736f6 | 3156 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3157 | struct batadv_tt_common_entry *tt_common; |
3158 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 3159 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 3160 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3161 | struct hlist_head *head; |
3162 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 3163 | uint32_t i; |
058d0e26 AQ |
3164 | |
3165 | if (!hash) | |
3166 | return; | |
3167 | ||
3168 | for (i = 0; i < hash->size; i++) { | |
3169 | head = &hash->table[i]; | |
3170 | list_lock = &hash->list_locks[i]; | |
3171 | ||
3172 | spin_lock_bh(list_lock); | |
b67bfe0d | 3173 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3174 | hash_entry) { |
3175 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3176 | continue; |
3177 | ||
39c75a51 | 3178 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3179 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3180 | tt_common->addr, | |
3181 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3182 | |
7ea7b4a1 | 3183 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3184 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3185 | tt_local = container_of(tt_common, |
3186 | struct batadv_tt_local_entry, | |
3187 | common); | |
35df3b29 AQ |
3188 | |
3189 | /* decrease the reference held for this vlan */ | |
3190 | vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid); | |
3191 | batadv_softif_vlan_free_ref(vlan); | |
3192 | batadv_softif_vlan_free_ref(vlan); | |
3193 | ||
56303d34 | 3194 | batadv_tt_local_entry_free_ref(tt_local); |
058d0e26 AQ |
3195 | } |
3196 | spin_unlock_bh(list_lock); | |
3197 | } | |
058d0e26 AQ |
3198 | } |
3199 | ||
e1bf0c14 | 3200 | /** |
a19d3d85 ML |
3201 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3202 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3203 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3204 | * |
3205 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3206 | */ |
a19d3d85 | 3207 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3208 | { |
c5caf4ef LL |
3209 | /* Update multicast addresses in local translation table */ |
3210 | batadv_mcast_mla_update(bat_priv); | |
3211 | ||
e1bf0c14 ML |
3212 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3213 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3214 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3215 | return; |
e1bf0c14 | 3216 | } |
be9aa4c1 | 3217 | |
7ea7b4a1 | 3218 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3219 | |
a513088d | 3220 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3221 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3222 | |
3223 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3224 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3225 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3226 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 3227 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3228 | |
3229 | /* reset the sending counter */ | |
807736f6 | 3230 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3231 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3232 | } |
a70a9aa9 | 3233 | |
a19d3d85 ML |
3234 | /** |
3235 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3236 | * have been queued in the time since the last commit | |
3237 | * @bat_priv: the bat priv with all the soft interface information | |
3238 | */ | |
3239 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3240 | { | |
3241 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3242 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3243 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3244 | } |
59b699cd | 3245 | |
56303d34 | 3246 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 3247 | uint8_t *dst, unsigned short vid) |
59b699cd | 3248 | { |
56303d34 SE |
3249 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3250 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3251 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3252 | bool ret = false; |
59b699cd | 3253 | |
b8cbd81d AQ |
3254 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3255 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3256 | goto out; |
59b699cd | 3257 | |
b8cbd81d | 3258 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3259 | if (!tt_local_entry) |
3260 | goto out; | |
3261 | ||
b8cbd81d | 3262 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3263 | if (!tt_global_entry) |
3264 | goto out; | |
3265 | ||
1f129fef | 3266 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3267 | goto out; |
3268 | ||
5870adc6 | 3269 | ret = true; |
59b699cd AQ |
3270 | |
3271 | out: | |
b8cbd81d AQ |
3272 | if (vlan) |
3273 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3274 | if (tt_global_entry) |
a513088d | 3275 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3276 | if (tt_local_entry) |
a513088d | 3277 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3278 | return ret; |
3279 | } | |
a943cac1 | 3280 | |
e1bf0c14 ML |
3281 | /** |
3282 | * batadv_tt_update_orig - update global translation table with new tt | |
3283 | * information received via ogms | |
3284 | * @bat_priv: the bat priv with all the soft interface information | |
3285 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3286 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3287 | * @tt_num_vlan: number of tvlv VLAN entries | |
3288 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3289 | * @tt_num_changes: number of tt changes inside the tt buffer |
3290 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3291 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3292 | */ |
3293 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3294 | struct batadv_orig_node *orig_node, | |
7ea7b4a1 AQ |
3295 | const void *tt_buff, uint16_t tt_num_vlan, |
3296 | struct batadv_tvlv_tt_change *tt_change, | |
3297 | uint16_t tt_num_changes, uint8_t ttvn) | |
a943cac1 ML |
3298 | { |
3299 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
7ea7b4a1 | 3300 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3301 | bool full_table = true; |
e17931d1 | 3302 | bool has_tt_init; |
a943cac1 | 3303 | |
7ea7b4a1 | 3304 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
e17931d1 LL |
3305 | has_tt_init = orig_node->capa_initialized & BATADV_ORIG_CAPA_HAS_TT; |
3306 | ||
17071578 | 3307 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3308 | * increased by one -> we can apply the attached changes |
3309 | */ | |
e17931d1 | 3310 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3311 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3312 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3313 | * times. | |
9cfc7bd6 SE |
3314 | * In this case send a tt request |
3315 | */ | |
a943cac1 ML |
3316 | if (!tt_num_changes) { |
3317 | full_table = false; | |
3318 | goto request_table; | |
3319 | } | |
3320 | ||
a70a9aa9 AQ |
3321 | spin_lock_bh(&orig_node->tt_lock); |
3322 | ||
a513088d | 3323 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3324 | ttvn, tt_change); |
a943cac1 ML |
3325 | |
3326 | /* Even if we received the precomputed crc with the OGM, we | |
3327 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3328 | * in the global table |
3329 | */ | |
7ea7b4a1 | 3330 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3331 | |
a70a9aa9 AQ |
3332 | spin_unlock_bh(&orig_node->tt_lock); |
3333 | ||
a943cac1 ML |
3334 | /* The ttvn alone is not enough to guarantee consistency |
3335 | * because a single value could represent different states | |
3336 | * (due to the wrap around). Thus a node has to check whether | |
3337 | * the resulting table (after applying the changes) is still | |
3338 | * consistent or not. E.g. a node could disconnect while its | |
3339 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3340 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3341 | * inconsistency |
3342 | */ | |
7ea7b4a1 AQ |
3343 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3344 | tt_num_vlan)) | |
a943cac1 | 3345 | goto request_table; |
a943cac1 ML |
3346 | } else { |
3347 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3348 | * in sync anymore -> request fresh tt data |
3349 | */ | |
e17931d1 | 3350 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3351 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3352 | tt_num_vlan)) { | |
a943cac1 | 3353 | request_table: |
39c75a51 | 3354 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3355 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3356 | orig_node->orig, ttvn, orig_ttvn, | |
3357 | tt_num_changes); | |
a513088d | 3358 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3359 | tt_vlan, tt_num_vlan, |
3360 | full_table); | |
a943cac1 ML |
3361 | return; |
3362 | } | |
3363 | } | |
3364 | } | |
3275e7cc | 3365 | |
c018ad3d AQ |
3366 | /** |
3367 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3368 | * @bat_priv: the bat priv with all the soft interface information | |
3369 | * @addr: the mac address of the client to check | |
3370 | * @vid: VLAN identifier | |
3371 | * | |
3372 | * Returns true if we know that the client has moved from its old originator | |
3373 | * to another one. This entry is still kept for consistency purposes and will be | |
3374 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3375 | */ |
56303d34 | 3376 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 3377 | uint8_t *addr, unsigned short vid) |
3275e7cc | 3378 | { |
56303d34 | 3379 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3380 | bool ret = false; |
3381 | ||
c018ad3d | 3382 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3383 | if (!tt_global_entry) |
3384 | goto out; | |
3385 | ||
c1d07431 | 3386 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3387 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3388 | out: |
3389 | return ret; | |
3390 | } | |
30cfd02b | 3391 | |
7c1fd91d AQ |
3392 | /** |
3393 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3394 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3395 | * @addr: the mac address of the local client to query |
3396 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3397 | * |
3398 | * Returns true if the local client is known to be roaming (it is not served by | |
3399 | * this node anymore) or not. If yes, the client is still present in the table | |
3400 | * to keep the latter consistent with the node TTVN | |
3401 | */ | |
3402 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 3403 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
3404 | { |
3405 | struct batadv_tt_local_entry *tt_local_entry; | |
3406 | bool ret = false; | |
3407 | ||
c018ad3d | 3408 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3409 | if (!tt_local_entry) |
3410 | goto out; | |
3411 | ||
3412 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3413 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3414 | out: | |
3415 | return ret; | |
7c1fd91d AQ |
3416 | } |
3417 | ||
30cfd02b AQ |
3418 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3419 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3420 | const unsigned char *addr, |
16052789 | 3421 | unsigned short vid) |
30cfd02b AQ |
3422 | { |
3423 | bool ret = false; | |
3424 | ||
16052789 | 3425 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3426 | BATADV_TT_CLIENT_TEMP, |
3427 | atomic_read(&orig_node->last_ttvn))) | |
3428 | goto out; | |
3429 | ||
3430 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3431 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3432 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3433 | ret = true; |
3434 | out: | |
3435 | return ret; | |
3436 | } | |
e1bf0c14 | 3437 | |
a19d3d85 ML |
3438 | /** |
3439 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3440 | * maximum packet size that can be transported through the mesh | |
3441 | * @soft_iface: netdev struct of the mesh interface | |
3442 | * | |
3443 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3444 | * to be removed. | |
3445 | */ | |
3446 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3447 | { | |
3448 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3449 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3450 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3451 | bool reduced = false; | |
3452 | ||
3453 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3454 | ||
3455 | while (true) { | |
3456 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3457 | if (packet_size_max >= table_size) | |
3458 | break; | |
3459 | ||
3460 | batadv_tt_local_purge(bat_priv, timeout); | |
3461 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3462 | ||
3463 | timeout /= 2; | |
3464 | reduced = true; | |
3465 | net_ratelimited_function(batadv_info, soft_iface, | |
3466 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3467 | packet_size_max); | |
3468 | } | |
3469 | ||
3470 | /* commit these changes immediately, to avoid synchronization problem | |
3471 | * with the TTVN | |
3472 | */ | |
3473 | if (reduced) | |
3474 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3475 | ||
3476 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3477 | } | |
3478 | ||
e1bf0c14 ML |
3479 | /** |
3480 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3481 | * @bat_priv: the bat priv with all the soft interface information | |
3482 | * @orig: the orig_node of the ogm | |
3483 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3484 | * @tvlv_value: tvlv buffer containing the gateway data | |
3485 | * @tvlv_value_len: tvlv buffer length | |
3486 | */ | |
3487 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3488 | struct batadv_orig_node *orig, | |
7ea7b4a1 | 3489 | uint8_t flags, void *tvlv_value, |
e1bf0c14 ML |
3490 | uint16_t tvlv_value_len) |
3491 | { | |
7ea7b4a1 AQ |
3492 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3493 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3494 | struct batadv_tvlv_tt_data *tt_data; |
7ea7b4a1 | 3495 | uint16_t num_entries, num_vlan; |
e1bf0c14 ML |
3496 | |
3497 | if (tvlv_value_len < sizeof(*tt_data)) | |
3498 | return; | |
3499 | ||
3500 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3501 | tvlv_value_len -= sizeof(*tt_data); | |
3502 | ||
7ea7b4a1 AQ |
3503 | num_vlan = ntohs(tt_data->num_vlan); |
3504 | ||
3505 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3506 | return; | |
3507 | ||
3508 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3509 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3510 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3511 | ||
298e6e68 | 3512 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3513 | |
7ea7b4a1 AQ |
3514 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3515 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3516 | } |
3517 | ||
335fbe0f ML |
3518 | /** |
3519 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3520 | * container | |
3521 | * @bat_priv: the bat priv with all the soft interface information | |
3522 | * @src: mac address of tt tvlv sender | |
3523 | * @dst: mac address of tt tvlv recipient | |
3524 | * @tvlv_value: tvlv buffer containing the tt data | |
3525 | * @tvlv_value_len: tvlv buffer length | |
3526 | * | |
3527 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3528 | * otherwise. | |
3529 | */ | |
3530 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3531 | uint8_t *src, uint8_t *dst, | |
3532 | void *tvlv_value, | |
3533 | uint16_t tvlv_value_len) | |
3534 | { | |
3535 | struct batadv_tvlv_tt_data *tt_data; | |
7ea7b4a1 | 3536 | uint16_t tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3537 | char tt_flag; |
3538 | bool ret; | |
3539 | ||
3540 | if (tvlv_value_len < sizeof(*tt_data)) | |
3541 | return NET_RX_SUCCESS; | |
3542 | ||
3543 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3544 | tvlv_value_len -= sizeof(*tt_data); | |
3545 | ||
7ea7b4a1 AQ |
3546 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3547 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3548 | ||
3549 | if (tvlv_value_len < tt_vlan_len) | |
3550 | return NET_RX_SUCCESS; | |
3551 | ||
3552 | tvlv_value_len -= tt_vlan_len; | |
3553 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3554 | |
3555 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3556 | case BATADV_TT_REQUEST: | |
3557 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3558 | ||
3559 | /* If this node cannot provide a TT response the tt_request is | |
3560 | * forwarded | |
3561 | */ | |
3562 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3563 | if (!ret) { | |
3564 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3565 | tt_flag = 'F'; | |
3566 | else | |
3567 | tt_flag = '.'; | |
3568 | ||
3569 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3570 | "Routing TT_REQUEST to %pM [%c]\n", | |
3571 | dst, tt_flag); | |
3572 | /* tvlv API will re-route the packet */ | |
3573 | return NET_RX_DROP; | |
3574 | } | |
3575 | break; | |
3576 | case BATADV_TT_RESPONSE: | |
3577 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3578 | ||
3579 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3580 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3581 | src, tt_num_entries); |
335fbe0f ML |
3582 | return NET_RX_SUCCESS; |
3583 | } | |
3584 | ||
3585 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3586 | tt_flag = 'F'; | |
3587 | else | |
3588 | tt_flag = '.'; | |
3589 | ||
3590 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3591 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3592 | ||
3593 | /* tvlv API will re-route the packet */ | |
3594 | return NET_RX_DROP; | |
3595 | } | |
3596 | ||
3597 | return NET_RX_SUCCESS; | |
3598 | } | |
3599 | ||
122edaa0 ML |
3600 | /** |
3601 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3602 | * @bat_priv: the bat priv with all the soft interface information | |
3603 | * @src: mac address of tt tvlv sender | |
3604 | * @dst: mac address of tt tvlv recipient | |
3605 | * @tvlv_value: tvlv buffer containing the tt data | |
3606 | * @tvlv_value_len: tvlv buffer length | |
3607 | * | |
3608 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3609 | * otherwise. | |
3610 | */ | |
3611 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3612 | uint8_t *src, uint8_t *dst, | |
3613 | void *tvlv_value, | |
3614 | uint16_t tvlv_value_len) | |
3615 | { | |
3616 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3617 | struct batadv_orig_node *orig_node = NULL; | |
3618 | ||
3619 | /* If this node is not the intended recipient of the | |
3620 | * roaming advertisement the packet is forwarded | |
3621 | * (the tvlv API will re-route the packet). | |
3622 | */ | |
3623 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3624 | return NET_RX_DROP; | |
3625 | ||
122edaa0 ML |
3626 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3627 | goto out; | |
3628 | ||
3629 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3630 | if (!orig_node) | |
3631 | goto out; | |
3632 | ||
3633 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3634 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3635 | ||
3636 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3637 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3638 | src, roaming_adv->client); | |
3639 | ||
3640 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3641 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3642 | atomic_read(&orig_node->last_ttvn) + 1); |
3643 | ||
3644 | out: | |
3645 | if (orig_node) | |
3646 | batadv_orig_node_free_ref(orig_node); | |
3647 | return NET_RX_SUCCESS; | |
3648 | } | |
3649 | ||
e1bf0c14 ML |
3650 | /** |
3651 | * batadv_tt_init - initialise the translation table internals | |
3652 | * @bat_priv: the bat priv with all the soft interface information | |
3653 | * | |
3654 | * Return 0 on success or negative error number in case of failure. | |
3655 | */ | |
3656 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3657 | { | |
3658 | int ret; | |
3659 | ||
0eb01568 AQ |
3660 | /* synchronized flags must be remote */ |
3661 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3662 | ||
e1bf0c14 ML |
3663 | ret = batadv_tt_local_init(bat_priv); |
3664 | if (ret < 0) | |
3665 | return ret; | |
3666 | ||
3667 | ret = batadv_tt_global_init(bat_priv); | |
3668 | if (ret < 0) | |
3669 | return ret; | |
3670 | ||
3671 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3672 | batadv_tt_tvlv_unicast_handler_v1, |
3673 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3674 | |
122edaa0 ML |
3675 | batadv_tvlv_handler_register(bat_priv, NULL, |
3676 | batadv_roam_tvlv_unicast_handler_v1, | |
3677 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3678 | ||
e1bf0c14 ML |
3679 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3680 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3681 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3682 | ||
3683 | return 1; | |
3684 | } | |
42cb0bef AQ |
3685 | |
3686 | /** | |
3687 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3688 | * @bat_priv: the bat priv with all the soft interface information | |
3689 | * @addr: the mac address of the client | |
3690 | * @vid: the identifier of the VLAN where this client is connected | |
3691 | * | |
3692 | * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false | |
3693 | * otherwise | |
3694 | */ | |
3695 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
3696 | const uint8_t *addr, unsigned short vid) | |
3697 | { | |
3698 | struct batadv_tt_global_entry *tt; | |
3699 | bool ret; | |
3700 | ||
3701 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3702 | if (!tt) | |
3703 | return false; | |
3704 | ||
3705 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3706 | ||
3707 | batadv_tt_global_entry_free_ref(tt); | |
3708 | ||
3709 | return ret; | |
3710 | } |