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9f6446c7 | 1 | /* Copyright (C) 2007-2015 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 | ||
c6c8fea2 | 18 | #include "translation-table.h" |
1e2c2a4f SE |
19 | #include "main.h" |
20 | ||
21 | #include <linux/atomic.h> | |
22 | #include <linux/bug.h> | |
23 | #include <linux/byteorder/generic.h> | |
24 | #include <linux/compiler.h> | |
25 | #include <linux/crc32c.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/etherdevice.h> | |
28 | #include <linux/fs.h> | |
29 | #include <linux/if_ether.h> | |
30 | #include <linux/jhash.h> | |
31 | #include <linux/jiffies.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/lockdep.h> | |
35 | #include <linux/netdevice.h> | |
36 | #include <linux/rculist.h> | |
37 | #include <linux/rcupdate.h> | |
38 | #include <linux/seq_file.h> | |
39 | #include <linux/slab.h> | |
40 | #include <linux/spinlock.h> | |
41 | #include <linux/stddef.h> | |
42 | #include <linux/string.h> | |
43 | #include <linux/workqueue.h> | |
44 | #include <net/net_namespace.h> | |
45 | ||
46 | #include "bridge_loop_avoidance.h" | |
32ae9b22 | 47 | #include "hard-interface.h" |
c6c8fea2 | 48 | #include "hash.h" |
c5caf4ef | 49 | #include "multicast.h" |
1e2c2a4f SE |
50 | #include "originator.h" |
51 | #include "packet.h" | |
52 | #include "soft-interface.h" | |
a73105b8 | 53 | |
dec05074 AQ |
54 | /* hash class keys */ |
55 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
56 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
57 | ||
56303d34 | 58 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 59 | unsigned short vid, |
56303d34 | 60 | struct batadv_orig_node *orig_node); |
a513088d SE |
61 | static void batadv_tt_purge(struct work_struct *work); |
62 | static void | |
56303d34 | 63 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
64 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
65 | struct batadv_orig_node *orig_node, | |
66 | const unsigned char *addr, | |
c018ad3d AQ |
67 | unsigned short vid, const char *message, |
68 | bool roaming); | |
c6c8fea2 | 69 | |
7aadf889 | 70 | /* returns 1 if they are the same mac addr */ |
a513088d | 71 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 72 | { |
56303d34 | 73 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 74 | hash_entry); |
7aadf889 | 75 | |
323813ed | 76 | return batadv_compare_eth(data1, data2); |
7aadf889 ML |
77 | } |
78 | ||
c018ad3d AQ |
79 | /** |
80 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
81 | * @data: pointer to the tt_common_entry object to map | |
82 | * @size: the size of the hash table | |
83 | * | |
84 | * Returns the hash index where the object represented by 'data' should be | |
85 | * stored at. | |
86 | */ | |
87 | static inline uint32_t batadv_choose_tt(const void *data, uint32_t size) | |
88 | { | |
89 | struct batadv_tt_common_entry *tt; | |
90 | uint32_t hash = 0; | |
91 | ||
92 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
93 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
94 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
95 | |
96 | return hash % size; | |
97 | } | |
98 | ||
99 | /** | |
100 | * batadv_tt_hash_find - look for a client in the given hash table | |
101 | * @hash: the hash table to search | |
102 | * @addr: the mac address of the client to look for | |
103 | * @vid: VLAN identifier | |
104 | * | |
105 | * Returns a pointer to the tt_common struct belonging to the searched client if | |
106 | * found, NULL otherwise. | |
107 | */ | |
56303d34 | 108 | static struct batadv_tt_common_entry * |
c018ad3d AQ |
109 | batadv_tt_hash_find(struct batadv_hashtable *hash, const uint8_t *addr, |
110 | unsigned short vid) | |
7aadf889 | 111 | { |
7aadf889 | 112 | struct hlist_head *head; |
c018ad3d | 113 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
c90681b8 | 114 | uint32_t index; |
7aadf889 ML |
115 | |
116 | if (!hash) | |
117 | return NULL; | |
118 | ||
8fdd0153 | 119 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
120 | to_search.vid = vid; |
121 | ||
122 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
123 | head = &hash->table[index]; |
124 | ||
125 | rcu_read_lock(); | |
c018ad3d AQ |
126 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
127 | if (!batadv_compare_eth(tt, addr)) | |
128 | continue; | |
129 | ||
130 | if (tt->vid != vid) | |
7aadf889 ML |
131 | continue; |
132 | ||
c018ad3d | 133 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
134 | continue; |
135 | ||
c018ad3d | 136 | tt_tmp = tt; |
7aadf889 ML |
137 | break; |
138 | } | |
139 | rcu_read_unlock(); | |
140 | ||
c018ad3d | 141 | return tt_tmp; |
7aadf889 ML |
142 | } |
143 | ||
c018ad3d AQ |
144 | /** |
145 | * batadv_tt_local_hash_find - search the local table for a given client | |
146 | * @bat_priv: the bat priv with all the soft interface information | |
147 | * @addr: the mac address of the client to look for | |
148 | * @vid: VLAN identifier | |
149 | * | |
150 | * Returns a pointer to the corresponding tt_local_entry struct if the client is | |
151 | * found, NULL otherwise. | |
152 | */ | |
56303d34 | 153 | static struct batadv_tt_local_entry * |
c018ad3d AQ |
154 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
155 | unsigned short vid) | |
7aadf889 | 156 | { |
56303d34 SE |
157 | struct batadv_tt_common_entry *tt_common_entry; |
158 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 159 | |
c018ad3d AQ |
160 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
161 | vid); | |
48100bac AQ |
162 | if (tt_common_entry) |
163 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
164 | struct batadv_tt_local_entry, |
165 | common); | |
48100bac AQ |
166 | return tt_local_entry; |
167 | } | |
7aadf889 | 168 | |
c018ad3d AQ |
169 | /** |
170 | * batadv_tt_global_hash_find - search the global table for a given client | |
171 | * @bat_priv: the bat priv with all the soft interface information | |
172 | * @addr: the mac address of the client to look for | |
173 | * @vid: VLAN identifier | |
174 | * | |
175 | * Returns a pointer to the corresponding tt_global_entry struct if the client | |
176 | * is found, NULL otherwise. | |
177 | */ | |
56303d34 | 178 | static struct batadv_tt_global_entry * |
c018ad3d AQ |
179 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
180 | unsigned short vid) | |
48100bac | 181 | { |
56303d34 SE |
182 | struct batadv_tt_common_entry *tt_common_entry; |
183 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 184 | |
c018ad3d AQ |
185 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
186 | vid); | |
48100bac AQ |
187 | if (tt_common_entry) |
188 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
189 | struct batadv_tt_global_entry, |
190 | common); | |
48100bac | 191 | return tt_global_entry; |
7aadf889 ML |
192 | } |
193 | ||
a513088d | 194 | static void |
56303d34 | 195 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 196 | { |
48100bac AQ |
197 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
198 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
199 | } |
200 | ||
21026059 AQ |
201 | /** |
202 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
203 | * tt_global_entry and possibly free it | |
204 | * @tt_global_entry: the object to free | |
205 | */ | |
a513088d | 206 | static void |
56303d34 | 207 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 208 | { |
db08e6e5 | 209 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 210 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 211 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
212 | } |
213 | } | |
214 | ||
1d8ab8d3 LL |
215 | /** |
216 | * batadv_tt_global_hash_count - count the number of orig entries | |
217 | * @hash: hash table containing the tt entries | |
218 | * @addr: the mac address of the client to count entries for | |
219 | * @vid: VLAN identifier | |
220 | * | |
221 | * Return the number of originators advertising the given address/data | |
222 | * (excluding ourself). | |
223 | */ | |
224 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
225 | const uint8_t *addr, unsigned short vid) | |
226 | { | |
227 | struct batadv_tt_global_entry *tt_global_entry; | |
228 | int count; | |
229 | ||
230 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
231 | if (!tt_global_entry) | |
232 | return 0; | |
233 | ||
234 | count = atomic_read(&tt_global_entry->orig_list_count); | |
235 | batadv_tt_global_entry_free_ref(tt_global_entry); | |
236 | ||
237 | return count; | |
238 | } | |
239 | ||
a513088d | 240 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 241 | { |
56303d34 | 242 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 243 | |
56303d34 | 244 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
245 | |
246 | /* We are in an rcu callback here, therefore we cannot use | |
247 | * batadv_orig_node_free_ref() and its call_rcu(): | |
248 | * An rcu_barrier() wouldn't wait for that to finish | |
249 | */ | |
250 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
251 | kfree(orig_entry); |
252 | } | |
253 | ||
7ea7b4a1 AQ |
254 | /** |
255 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
256 | * by vid | |
257 | * @bat_priv: the bat priv with all the soft interface information | |
258 | * @vid: the VLAN identifier of the sub-table to change | |
259 | * @v: the amount to sum to the local table size | |
260 | */ | |
261 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
262 | unsigned short vid, int v) | |
263 | { | |
264 | struct batadv_softif_vlan *vlan; | |
265 | ||
266 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
267 | if (!vlan) | |
268 | return; | |
269 | ||
270 | atomic_add(v, &vlan->tt.num_entries); | |
271 | ||
272 | batadv_softif_vlan_free_ref(vlan); | |
273 | } | |
274 | ||
275 | /** | |
276 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
277 | * vid | |
278 | * @bat_priv: the bat priv with all the soft interface information | |
279 | * @vid: the VLAN identifier | |
280 | */ | |
281 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
282 | unsigned short vid) | |
283 | { | |
284 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
285 | } | |
286 | ||
287 | /** | |
288 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
289 | * vid | |
290 | * @bat_priv: the bat priv with all the soft interface information | |
291 | * @vid: the VLAN identifier | |
292 | */ | |
293 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
294 | unsigned short vid) | |
295 | { | |
296 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
297 | } | |
298 | ||
299 | /** | |
300 | * batadv_tt_global_size_mod - change the size by v of the local table | |
301 | * identified by vid | |
302 | * @bat_priv: the bat priv with all the soft interface information | |
303 | * @vid: the VLAN identifier | |
304 | * @v: the amount to sum to the global table size | |
305 | */ | |
306 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
307 | unsigned short vid, int v) | |
308 | { | |
309 | struct batadv_orig_node_vlan *vlan; | |
310 | ||
311 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
312 | if (!vlan) | |
313 | return; | |
314 | ||
315 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
316 | spin_lock_bh(&orig_node->vlan_list_lock); | |
317 | list_del_rcu(&vlan->list); | |
318 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
319 | batadv_orig_node_vlan_free_ref(vlan); | |
320 | } | |
321 | ||
322 | batadv_orig_node_vlan_free_ref(vlan); | |
323 | } | |
324 | ||
325 | /** | |
326 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
327 | * given vid | |
328 | * @orig_node: the originator which global table size has to be decreased | |
329 | * @vid: the vlan identifier | |
330 | */ | |
331 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
332 | unsigned short vid) | |
333 | { | |
334 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
335 | } | |
336 | ||
337 | /** | |
338 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
339 | * given vid | |
340 | * @orig_node: the originator which global table size has to be decreased | |
341 | * @vid: the vlan identifier | |
342 | */ | |
343 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
344 | unsigned short vid) | |
345 | { | |
346 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
347 | } | |
348 | ||
a513088d | 349 | static void |
56303d34 | 350 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 351 | { |
d657e621 AQ |
352 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
353 | return; | |
7ea7b4a1 | 354 | |
a513088d | 355 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
356 | } |
357 | ||
3abe4adb AQ |
358 | /** |
359 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
360 | * @bat_priv: the bat priv with all the soft interface information | |
361 | * @tt_local_entry: the TT entry involved in the event | |
362 | * @event_flags: flags to store in the event structure | |
363 | */ | |
56303d34 | 364 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb AQ |
365 | struct batadv_tt_local_entry *tt_local_entry, |
366 | uint8_t event_flags) | |
a73105b8 | 367 | { |
56303d34 | 368 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb AQ |
369 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
370 | uint8_t flags = common->flags | event_flags; | |
3b643de5 AQ |
371 | bool event_removed = false; |
372 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
373 | |
374 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
375 | if (!tt_change_node) |
376 | return; | |
377 | ||
ff66c975 | 378 | tt_change_node->change.flags = flags; |
ca663046 AQ |
379 | memset(tt_change_node->change.reserved, 0, |
380 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 381 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 382 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 383 | |
acd34afa | 384 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
385 | |
386 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
387 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
388 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 389 | list) { |
3abe4adb | 390 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
391 | continue; |
392 | ||
393 | /* DEL+ADD in the same orig interval have no effect and can be | |
394 | * removed to avoid silly behaviour on the receiver side. The | |
395 | * other way around (ADD+DEL) can happen in case of roaming of | |
396 | * a client still in the NEW state. Roaming of NEW clients is | |
397 | * now possible due to automatically recognition of "temporary" | |
398 | * clients | |
399 | */ | |
acd34afa | 400 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
401 | if (!del_op_requested && del_op_entry) |
402 | goto del; | |
403 | if (del_op_requested && !del_op_entry) | |
404 | goto del; | |
3c4f7ab6 AQ |
405 | |
406 | /* this is a second add in the same originator interval. It | |
407 | * means that flags have been changed: update them! | |
408 | */ | |
409 | if (!del_op_requested && !del_op_entry) | |
410 | entry->change.flags = flags; | |
411 | ||
3b643de5 AQ |
412 | continue; |
413 | del: | |
414 | list_del(&entry->list); | |
415 | kfree(entry); | |
155e4e12 | 416 | kfree(tt_change_node); |
3b643de5 AQ |
417 | event_removed = true; |
418 | goto unlock; | |
419 | } | |
420 | ||
a73105b8 | 421 | /* track the change in the OGMinterval list */ |
807736f6 | 422 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
423 | |
424 | unlock: | |
807736f6 | 425 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 426 | |
3b643de5 | 427 | if (event_removed) |
807736f6 | 428 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 429 | else |
807736f6 | 430 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
431 | } |
432 | ||
335fbe0f ML |
433 | /** |
434 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
435 | * @changes_num: number of tt changes | |
436 | * | |
437 | * Returns computed length in bytes. | |
438 | */ | |
439 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 440 | { |
335fbe0f | 441 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
442 | } |
443 | ||
298e6e68 AQ |
444 | /** |
445 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
446 | * @tt_len: available space | |
447 | * | |
448 | * Returns the number of entries. | |
449 | */ | |
450 | static uint16_t batadv_tt_entries(uint16_t tt_len) | |
451 | { | |
452 | return tt_len / batadv_tt_len(1); | |
453 | } | |
454 | ||
a19d3d85 ML |
455 | /** |
456 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
457 | * size when transmitted over the air | |
458 | * @bat_priv: the bat priv with all the soft interface information | |
459 | * | |
460 | * Returns local translation table size in bytes. | |
461 | */ | |
462 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
463 | { | |
464 | uint16_t num_vlan = 0, tt_local_entries = 0; | |
465 | struct batadv_softif_vlan *vlan; | |
466 | int hdr_size; | |
467 | ||
468 | rcu_read_lock(); | |
469 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
470 | num_vlan++; | |
471 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
472 | } | |
473 | rcu_read_unlock(); | |
474 | ||
475 | /* header size of tvlv encapsulated tt response payload */ | |
476 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
477 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
478 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
479 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
480 | ||
481 | return hdr_size + batadv_tt_len(tt_local_entries); | |
482 | } | |
483 | ||
56303d34 | 484 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 485 | { |
807736f6 | 486 | if (bat_priv->tt.local_hash) |
5346c35e | 487 | return 0; |
c6c8fea2 | 488 | |
807736f6 | 489 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 490 | |
807736f6 | 491 | if (!bat_priv->tt.local_hash) |
5346c35e | 492 | return -ENOMEM; |
c6c8fea2 | 493 | |
dec05074 AQ |
494 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
495 | &batadv_tt_local_hash_lock_class_key); | |
496 | ||
5346c35e | 497 | return 0; |
c6c8fea2 SE |
498 | } |
499 | ||
068ee6e2 AQ |
500 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
501 | struct batadv_tt_global_entry *tt_global, | |
502 | const char *message) | |
503 | { | |
504 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
505 | "Deleting global tt entry %pM (vid: %d): %s\n", |
506 | tt_global->common.addr, | |
507 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
508 | |
509 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 510 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 511 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
512 | } |
513 | ||
c018ad3d AQ |
514 | /** |
515 | * batadv_tt_local_add - add a new client to the local table or update an | |
516 | * existing client | |
517 | * @soft_iface: netdev struct of the mesh interface | |
518 | * @addr: the mac address of the client to add | |
519 | * @vid: VLAN identifier | |
520 | * @ifindex: index of the interface where the client is connected to (useful to | |
521 | * identify wireless clients) | |
9464d071 AQ |
522 | * @mark: the value contained in the skb->mark field of the received packet (if |
523 | * any) | |
a19d3d85 ML |
524 | * |
525 | * Returns true if the client was successfully added, false otherwise. | |
c018ad3d | 526 | */ |
a19d3d85 | 527 | bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
9464d071 | 528 | unsigned short vid, int ifindex, uint32_t mark) |
c6c8fea2 | 529 | { |
56303d34 | 530 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 531 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 532 | struct batadv_tt_global_entry *tt_global = NULL; |
35df3b29 | 533 | struct batadv_softif_vlan *vlan; |
0c69aecc | 534 | struct net_device *in_dev = NULL; |
db08e6e5 | 535 | struct hlist_head *head; |
56303d34 | 536 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 ML |
537 | int hash_added, table_size, packet_size_max; |
538 | bool ret = false, roamed_back = false; | |
3c4f7ab6 | 539 | uint8_t remote_flags; |
9464d071 | 540 | uint32_t match_mark; |
c6c8fea2 | 541 | |
0c69aecc AQ |
542 | if (ifindex != BATADV_NULL_IFINDEX) |
543 | in_dev = dev_get_by_index(&init_net, ifindex); | |
544 | ||
c018ad3d | 545 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
546 | |
547 | if (!is_multicast_ether_addr(addr)) | |
548 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 549 | |
47c94655 AQ |
550 | if (tt_local) { |
551 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
552 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
553 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
554 | "Re-adding pending client %pM (vid: %d)\n", |
555 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
556 | /* whatever the reason why the PENDING flag was set, |
557 | * this is a client which was enqueued to be removed in | |
558 | * this orig_interval. Since it popped up again, the | |
559 | * flag can be reset like it was never enqueued | |
560 | */ | |
561 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
562 | goto add_event; | |
563 | } | |
564 | ||
565 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
566 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
567 | "Roaming client %pM (vid: %d) came back to its original location\n", |
568 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
569 | /* the ROAM flag is set because this client roamed away |
570 | * and the node got a roaming_advertisement message. Now | |
571 | * that the client popped up again at its original | |
572 | * location such flag can be unset | |
573 | */ | |
574 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
575 | roamed_back = true; | |
576 | } | |
577 | goto check_roaming; | |
c6c8fea2 SE |
578 | } |
579 | ||
a19d3d85 ML |
580 | /* Ignore the client if we cannot send it in a full table response. */ |
581 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
582 | table_size += batadv_tt_len(1); | |
583 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
584 | if (table_size > packet_size_max) { | |
585 | net_ratelimited_function(batadv_info, soft_iface, | |
586 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
587 | table_size, packet_size_max, addr); | |
588 | goto out; | |
589 | } | |
590 | ||
47c94655 AQ |
591 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
592 | if (!tt_local) | |
7683fdc1 | 593 | goto out; |
a73105b8 | 594 | |
35df3b29 AQ |
595 | /* increase the refcounter of the related vlan */ |
596 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
597 | ||
39c75a51 | 598 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
599 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
600 | addr, BATADV_PRINT_VID(vid), | |
807736f6 | 601 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 602 | |
8fdd0153 | 603 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
604 | /* The local entry has to be marked as NEW to avoid to send it in |
605 | * a full table response going out before the next ttvn increment | |
606 | * (consistency check) | |
607 | */ | |
608 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 609 | tt_local->common.vid = vid; |
0c69aecc | 610 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
611 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
612 | atomic_set(&tt_local->common.refcount, 2); | |
613 | tt_local->last_seen = jiffies; | |
614 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 615 | |
c5caf4ef LL |
616 | /* the batman interface mac and multicast addresses should never be |
617 | * purged | |
618 | */ | |
619 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
620 | is_multicast_ether_addr(addr)) | |
47c94655 | 621 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 622 | |
807736f6 | 623 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 624 | batadv_choose_tt, &tt_local->common, |
47c94655 | 625 | &tt_local->common.hash_entry); |
80b3f58c SW |
626 | |
627 | if (unlikely(hash_added != 0)) { | |
628 | /* remove the reference for the hash */ | |
47c94655 | 629 | batadv_tt_local_entry_free_ref(tt_local); |
35df3b29 | 630 | batadv_softif_vlan_free_ref(vlan); |
80b3f58c SW |
631 | goto out; |
632 | } | |
633 | ||
068ee6e2 | 634 | add_event: |
3abe4adb | 635 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 636 | |
068ee6e2 AQ |
637 | check_roaming: |
638 | /* Check whether it is a roaming, but don't do anything if the roaming | |
639 | * process has already been handled | |
640 | */ | |
641 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 642 | /* These node are probably going to update their tt table */ |
47c94655 | 643 | head = &tt_global->orig_list; |
db08e6e5 | 644 | rcu_read_lock(); |
b67bfe0d | 645 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 646 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 647 | tt_global->common.vid, |
a513088d | 648 | orig_entry->orig_node); |
db08e6e5 SW |
649 | } |
650 | rcu_read_unlock(); | |
068ee6e2 AQ |
651 | if (roamed_back) { |
652 | batadv_tt_global_free(bat_priv, tt_global, | |
653 | "Roaming canceled"); | |
654 | tt_global = NULL; | |
655 | } else { | |
656 | /* The global entry has to be marked as ROAMING and | |
657 | * has to be kept for consistency purpose | |
658 | */ | |
659 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
660 | tt_global->roam_at = jiffies; | |
661 | } | |
7683fdc1 | 662 | } |
068ee6e2 | 663 | |
3c4f7ab6 AQ |
664 | /* store the current remote flags before altering them. This helps |
665 | * understanding is flags are changing or not | |
666 | */ | |
667 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
668 | ||
669 | if (batadv_is_wifi_netdev(in_dev)) | |
670 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
671 | else | |
672 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 673 | |
9464d071 AQ |
674 | /* check the mark in the skb: if it's equal to the configured |
675 | * isolation_mark, it means the packet is coming from an isolated | |
676 | * non-mesh client | |
677 | */ | |
678 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
679 | if (bat_priv->isolation_mark_mask && | |
680 | match_mark == bat_priv->isolation_mark) | |
681 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
682 | else | |
683 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
684 | ||
3c4f7ab6 AQ |
685 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
686 | * entry so that all the nodes can get the new flags | |
687 | */ | |
688 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
689 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
690 | ||
691 | ret = true; | |
7683fdc1 | 692 | out: |
0c69aecc AQ |
693 | if (in_dev) |
694 | dev_put(in_dev); | |
47c94655 AQ |
695 | if (tt_local) |
696 | batadv_tt_local_entry_free_ref(tt_local); | |
697 | if (tt_global) | |
698 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 699 | return ret; |
c6c8fea2 SE |
700 | } |
701 | ||
7ea7b4a1 AQ |
702 | /** |
703 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
704 | * within a TT Response directed to another node | |
705 | * @orig_node: originator for which the TT data has to be prepared | |
706 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
707 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
708 | * changed can be stored | |
709 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
710 | * function reserves the amount of space needed to send the entire global TT | |
711 | * table. In case of success the value is updated with the real amount of | |
712 | * reserved bytes | |
713 | ||
714 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
715 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
716 | * objects, one per active VLAN served by the originator node. | |
717 | * | |
718 | * Return the size of the allocated buffer or 0 in case of failure. | |
719 | */ | |
720 | static uint16_t | |
721 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, | |
722 | struct batadv_tvlv_tt_data **tt_data, | |
723 | struct batadv_tvlv_tt_change **tt_change, | |
724 | int32_t *tt_len) | |
725 | { | |
726 | uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len; | |
727 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
728 | struct batadv_orig_node_vlan *vlan; | |
729 | uint8_t *tt_change_ptr; | |
730 | ||
731 | rcu_read_lock(); | |
732 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
733 | num_vlan++; | |
734 | num_entries += atomic_read(&vlan->tt.num_entries); | |
735 | } | |
736 | ||
737 | change_offset = sizeof(**tt_data); | |
738 | change_offset += num_vlan * sizeof(*tt_vlan); | |
739 | ||
740 | /* if tt_len is negative, allocate the space needed by the full table */ | |
741 | if (*tt_len < 0) | |
742 | *tt_len = batadv_tt_len(num_entries); | |
743 | ||
744 | tvlv_len = *tt_len; | |
745 | tvlv_len += change_offset; | |
746 | ||
747 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
748 | if (!*tt_data) { | |
749 | *tt_len = 0; | |
750 | goto out; | |
751 | } | |
752 | ||
753 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
754 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
755 | (*tt_data)->num_vlan = htons(num_vlan); | |
756 | ||
757 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
758 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
759 | tt_vlan->vid = htons(vlan->vid); | |
760 | tt_vlan->crc = htonl(vlan->tt.crc); | |
761 | ||
762 | tt_vlan++; | |
763 | } | |
764 | ||
765 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
766 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
767 | ||
768 | out: | |
769 | rcu_read_unlock(); | |
770 | return tvlv_len; | |
771 | } | |
772 | ||
773 | /** | |
774 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
775 | * node | |
776 | * @bat_priv: the bat priv with all the soft interface information | |
777 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
778 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
779 | * changes can be stored | |
780 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
781 | * function reserves the amount of space needed to send the entire local TT | |
782 | * table. In case of success the value is updated with the real amount of | |
783 | * reserved bytes | |
784 | * | |
785 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
786 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
787 | * objects, one per active VLAN. | |
788 | * | |
789 | * Return the size of the allocated buffer or 0 in case of failure. | |
790 | */ | |
791 | static uint16_t | |
792 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, | |
793 | struct batadv_tvlv_tt_data **tt_data, | |
794 | struct batadv_tvlv_tt_change **tt_change, | |
795 | int32_t *tt_len) | |
796 | { | |
797 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
798 | struct batadv_softif_vlan *vlan; | |
799 | uint16_t num_vlan = 0, num_entries = 0, tvlv_len; | |
800 | uint8_t *tt_change_ptr; | |
801 | int change_offset; | |
802 | ||
803 | rcu_read_lock(); | |
804 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
805 | num_vlan++; | |
806 | num_entries += atomic_read(&vlan->tt.num_entries); | |
807 | } | |
808 | ||
809 | change_offset = sizeof(**tt_data); | |
810 | change_offset += num_vlan * sizeof(*tt_vlan); | |
811 | ||
812 | /* if tt_len is negative, allocate the space needed by the full table */ | |
813 | if (*tt_len < 0) | |
814 | *tt_len = batadv_tt_len(num_entries); | |
815 | ||
816 | tvlv_len = *tt_len; | |
817 | tvlv_len += change_offset; | |
818 | ||
819 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
820 | if (!*tt_data) { | |
821 | tvlv_len = 0; | |
822 | goto out; | |
823 | } | |
824 | ||
825 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
826 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
827 | (*tt_data)->num_vlan = htons(num_vlan); | |
828 | ||
829 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
830 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
831 | tt_vlan->vid = htons(vlan->vid); | |
832 | tt_vlan->crc = htonl(vlan->tt.crc); | |
833 | ||
834 | tt_vlan++; | |
835 | } | |
836 | ||
837 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
838 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
839 | ||
840 | out: | |
841 | rcu_read_unlock(); | |
842 | return tvlv_len; | |
843 | } | |
844 | ||
e1bf0c14 ML |
845 | /** |
846 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
847 | * after local tt changes have been committed | |
848 | * @bat_priv: the bat priv with all the soft interface information | |
849 | */ | |
850 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 851 | { |
e1bf0c14 ML |
852 | struct batadv_tt_change_node *entry, *safe; |
853 | struct batadv_tvlv_tt_data *tt_data; | |
854 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 855 | int tt_diff_len, tt_change_len = 0; |
e1bf0c14 | 856 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; |
7ea7b4a1 | 857 | uint16_t tvlv_len; |
be9aa4c1 | 858 | |
7ea7b4a1 AQ |
859 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
860 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
861 | |
862 | /* if we have too many changes for one packet don't send any | |
863 | * and wait for the tt table request which will be fragmented | |
864 | */ | |
e1bf0c14 ML |
865 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
866 | tt_diff_len = 0; | |
be9aa4c1 | 867 | |
7ea7b4a1 AQ |
868 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
869 | &tt_change, &tt_diff_len); | |
870 | if (!tvlv_len) | |
e1bf0c14 | 871 | return; |
be9aa4c1 | 872 | |
e1bf0c14 | 873 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 874 | |
e1bf0c14 ML |
875 | if (tt_diff_len == 0) |
876 | goto container_register; | |
be9aa4c1 | 877 | |
807736f6 SE |
878 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
879 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 880 | |
807736f6 | 881 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 882 | list) { |
e1bf0c14 ML |
883 | if (tt_diff_entries_count < tt_diff_entries_num) { |
884 | memcpy(tt_change + tt_diff_entries_count, | |
885 | &entry->change, | |
886 | sizeof(struct batadv_tvlv_tt_change)); | |
887 | tt_diff_entries_count++; | |
c6c8fea2 | 888 | } |
a73105b8 AQ |
889 | list_del(&entry->list); |
890 | kfree(entry); | |
c6c8fea2 | 891 | } |
807736f6 | 892 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
893 | |
894 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
895 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
896 | kfree(bat_priv->tt.last_changeset); | |
897 | bat_priv->tt.last_changeset_len = 0; | |
898 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 899 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 900 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 901 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 902 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
903 | * instead of providing the diff |
904 | */ | |
e1bf0c14 | 905 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 906 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
907 | memcpy(bat_priv->tt.last_changeset, |
908 | tt_change, tt_change_len); | |
909 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
910 | } |
911 | } | |
807736f6 | 912 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 913 | |
e1bf0c14 ML |
914 | container_register: |
915 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 916 | tvlv_len); |
e1bf0c14 | 917 | kfree(tt_data); |
c6c8fea2 SE |
918 | } |
919 | ||
08c36d3e | 920 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
921 | { |
922 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 923 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 924 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 925 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 926 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 927 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 928 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 929 | struct hlist_head *head; |
7ea7b4a1 | 930 | unsigned short vid; |
c90681b8 | 931 | uint32_t i; |
85766a82 AQ |
932 | int last_seen_secs; |
933 | int last_seen_msecs; | |
934 | unsigned long last_seen_jiffies; | |
935 | bool no_purge; | |
936 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 937 | |
30da63a6 ML |
938 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
939 | if (!primary_if) | |
32ae9b22 | 940 | goto out; |
c6c8fea2 | 941 | |
86ceb360 | 942 | seq_printf(seq, |
7ea7b4a1 AQ |
943 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
944 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); | |
dd24ddb2 | 945 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 946 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 947 | |
c6c8fea2 SE |
948 | for (i = 0; i < hash->size; i++) { |
949 | head = &hash->table[i]; | |
950 | ||
7aadf889 | 951 | rcu_read_lock(); |
b67bfe0d | 952 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 953 | head, hash_entry) { |
85766a82 AQ |
954 | tt_local = container_of(tt_common_entry, |
955 | struct batadv_tt_local_entry, | |
956 | common); | |
7ea7b4a1 | 957 | vid = tt_common_entry->vid; |
85766a82 AQ |
958 | last_seen_jiffies = jiffies - tt_local->last_seen; |
959 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
960 | last_seen_secs = last_seen_msecs / 1000; | |
961 | last_seen_msecs = last_seen_msecs % 1000; | |
962 | ||
963 | no_purge = tt_common_entry->flags & np_flag; | |
964 | ||
7ea7b4a1 AQ |
965 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
966 | if (!vlan) { | |
967 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
968 | BATADV_PRINT_VID(vid)); | |
969 | continue; | |
970 | } | |
971 | ||
972 | seq_printf(seq, | |
dd24ddb2 | 973 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 974 | tt_common_entry->addr, |
16052789 | 975 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
976 | ((tt_common_entry->flags & |
977 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 978 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
979 | ((tt_common_entry->flags & |
980 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
981 | ((tt_common_entry->flags & | |
982 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
983 | ((tt_common_entry->flags & | |
984 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
985 | ((tt_common_entry->flags & | |
986 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 987 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
988 | no_purge ? 0 : last_seen_msecs, |
989 | vlan->tt.crc); | |
990 | ||
991 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 992 | } |
7aadf889 | 993 | rcu_read_unlock(); |
c6c8fea2 | 994 | } |
32ae9b22 ML |
995 | out: |
996 | if (primary_if) | |
e5d89254 | 997 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 998 | return 0; |
c6c8fea2 SE |
999 | } |
1000 | ||
56303d34 SE |
1001 | static void |
1002 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1003 | struct batadv_tt_local_entry *tt_local_entry, | |
1004 | uint16_t flags, const char *message) | |
c6c8fea2 | 1005 | { |
3abe4adb | 1006 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1007 | |
015758d0 AQ |
1008 | /* The local client has to be marked as "pending to be removed" but has |
1009 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1010 | * response issued before the net ttvn increment (consistency check) |
1011 | */ | |
acd34afa | 1012 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1013 | |
39c75a51 | 1014 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1015 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1016 | tt_local_entry->common.addr, | |
1017 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1018 | } |
1019 | ||
7f91d06c AQ |
1020 | /** |
1021 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1022 | * @bat_priv: the bat priv with all the soft interface information | |
1023 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1024 | * @vid: VLAN identifier |
7f91d06c AQ |
1025 | * @message: message to append to the log on deletion |
1026 | * @roaming: true if the deletion is due to a roaming event | |
1027 | * | |
1028 | * Returns the flags assigned to the local entry before being deleted | |
1029 | */ | |
1030 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
c018ad3d AQ |
1031 | const uint8_t *addr, unsigned short vid, |
1032 | const char *message, bool roaming) | |
c6c8fea2 | 1033 | { |
170173bf | 1034 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 1035 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
35df3b29 | 1036 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 1037 | |
c018ad3d | 1038 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1039 | if (!tt_local_entry) |
1040 | goto out; | |
1041 | ||
7f91d06c AQ |
1042 | curr_flags = tt_local_entry->common.flags; |
1043 | ||
acd34afa | 1044 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1045 | /* if this global entry addition is due to a roaming, the node has to |
1046 | * mark the local entry as "roamed" in order to correctly reroute | |
1047 | * packets later | |
1048 | */ | |
7c1fd91d | 1049 | if (roaming) { |
acd34afa | 1050 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1051 | /* mark the local client as ROAMed */ |
1052 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1053 | } | |
42d0b044 | 1054 | |
068ee6e2 AQ |
1055 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1056 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1057 | message); | |
1058 | goto out; | |
1059 | } | |
1060 | /* if this client has been added right now, it is possible to | |
1061 | * immediately purge it | |
1062 | */ | |
3abe4adb | 1063 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
068ee6e2 AQ |
1064 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
1065 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 1066 | |
35df3b29 AQ |
1067 | /* decrease the reference held for this vlan */ |
1068 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
1069 | batadv_softif_vlan_free_ref(vlan); | |
1070 | batadv_softif_vlan_free_ref(vlan); | |
1071 | ||
7683fdc1 AQ |
1072 | out: |
1073 | if (tt_local_entry) | |
a513088d | 1074 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1075 | |
1076 | return curr_flags; | |
c6c8fea2 SE |
1077 | } |
1078 | ||
a19d3d85 ML |
1079 | /** |
1080 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1081 | * @bat_priv: the bat priv with all the soft interface information | |
1082 | * @head: pointer to the list containing the local tt entries | |
1083 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1084 | * inactive or not | |
1085 | */ | |
56303d34 | 1086 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1087 | struct hlist_head *head, |
1088 | int timeout) | |
c6c8fea2 | 1089 | { |
56303d34 SE |
1090 | struct batadv_tt_local_entry *tt_local_entry; |
1091 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1092 | struct hlist_node *node_tmp; |
acd34afa | 1093 | |
b67bfe0d | 1094 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1095 | hash_entry) { |
1096 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1097 | struct batadv_tt_local_entry, |
1098 | common); | |
acd34afa SE |
1099 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1100 | continue; | |
1101 | ||
1102 | /* entry already marked for deletion */ | |
1103 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1104 | continue; | |
1105 | ||
a19d3d85 | 1106 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1107 | continue; |
1108 | ||
1109 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1110 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1111 | } | |
1112 | } | |
1113 | ||
a19d3d85 ML |
1114 | /** |
1115 | * batadv_tt_local_purge - purge inactive tt local entries | |
1116 | * @bat_priv: the bat priv with all the soft interface information | |
1117 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1118 | * inactive or not | |
1119 | */ | |
1120 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1121 | int timeout) | |
acd34afa | 1122 | { |
807736f6 | 1123 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1124 | struct hlist_head *head; |
7683fdc1 | 1125 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1126 | uint32_t i; |
c6c8fea2 | 1127 | |
c6c8fea2 SE |
1128 | for (i = 0; i < hash->size; i++) { |
1129 | head = &hash->table[i]; | |
7683fdc1 | 1130 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1131 | |
7683fdc1 | 1132 | spin_lock_bh(list_lock); |
a19d3d85 | 1133 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1134 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1135 | } |
c6c8fea2 SE |
1136 | } |
1137 | ||
56303d34 | 1138 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1139 | { |
5bf74e9c | 1140 | struct batadv_hashtable *hash; |
a73105b8 | 1141 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1142 | struct batadv_tt_common_entry *tt_common_entry; |
1143 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 1144 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 1145 | struct hlist_node *node_tmp; |
7683fdc1 | 1146 | struct hlist_head *head; |
c90681b8 | 1147 | uint32_t i; |
a73105b8 | 1148 | |
807736f6 | 1149 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1150 | return; |
1151 | ||
807736f6 | 1152 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1153 | |
1154 | for (i = 0; i < hash->size; i++) { | |
1155 | head = &hash->table[i]; | |
1156 | list_lock = &hash->list_locks[i]; | |
1157 | ||
1158 | spin_lock_bh(list_lock); | |
b67bfe0d | 1159 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1160 | head, hash_entry) { |
b67bfe0d | 1161 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1162 | tt_local = container_of(tt_common_entry, |
1163 | struct batadv_tt_local_entry, | |
1164 | common); | |
35df3b29 AQ |
1165 | |
1166 | /* decrease the reference held for this vlan */ | |
1167 | vlan = batadv_softif_vlan_get(bat_priv, | |
1168 | tt_common_entry->vid); | |
1169 | batadv_softif_vlan_free_ref(vlan); | |
1170 | batadv_softif_vlan_free_ref(vlan); | |
1171 | ||
56303d34 | 1172 | batadv_tt_local_entry_free_ref(tt_local); |
a73105b8 AQ |
1173 | } |
1174 | spin_unlock_bh(list_lock); | |
1175 | } | |
1176 | ||
1a8eaf07 | 1177 | batadv_hash_destroy(hash); |
a73105b8 | 1178 | |
807736f6 | 1179 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1180 | } |
1181 | ||
56303d34 | 1182 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1183 | { |
807736f6 | 1184 | if (bat_priv->tt.global_hash) |
5346c35e | 1185 | return 0; |
c6c8fea2 | 1186 | |
807736f6 | 1187 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1188 | |
807736f6 | 1189 | if (!bat_priv->tt.global_hash) |
5346c35e | 1190 | return -ENOMEM; |
c6c8fea2 | 1191 | |
dec05074 AQ |
1192 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1193 | &batadv_tt_global_hash_lock_class_key); | |
1194 | ||
5346c35e | 1195 | return 0; |
c6c8fea2 SE |
1196 | } |
1197 | ||
56303d34 | 1198 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1199 | { |
56303d34 | 1200 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1201 | |
807736f6 | 1202 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1203 | |
807736f6 | 1204 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1205 | list) { |
1206 | list_del(&entry->list); | |
1207 | kfree(entry); | |
1208 | } | |
c6c8fea2 | 1209 | |
807736f6 SE |
1210 | atomic_set(&bat_priv->tt.local_changes, 0); |
1211 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1212 | } |
c6c8fea2 | 1213 | |
d657e621 AQ |
1214 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1215 | * batadv_tt_global_entry list | |
1216 | * | |
1217 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1218 | */ |
d657e621 AQ |
1219 | static struct batadv_tt_orig_list_entry * |
1220 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1221 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1222 | { |
d657e621 | 1223 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1224 | const struct hlist_head *head; |
db08e6e5 SW |
1225 | |
1226 | rcu_read_lock(); | |
1227 | head = &entry->orig_list; | |
b67bfe0d | 1228 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1229 | if (tmp_orig_entry->orig_node != orig_node) |
1230 | continue; | |
1231 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1232 | continue; | |
1233 | ||
1234 | orig_entry = tmp_orig_entry; | |
1235 | break; | |
db08e6e5 SW |
1236 | } |
1237 | rcu_read_unlock(); | |
d657e621 AQ |
1238 | |
1239 | return orig_entry; | |
1240 | } | |
1241 | ||
1242 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1243 | * returns true if found, false otherwise | |
1244 | */ | |
1245 | static bool | |
1246 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1247 | const struct batadv_orig_node *orig_node) | |
1248 | { | |
1249 | struct batadv_tt_orig_list_entry *orig_entry; | |
1250 | bool found = false; | |
1251 | ||
1252 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1253 | if (orig_entry) { | |
1254 | found = true; | |
1255 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1256 | } | |
1257 | ||
db08e6e5 SW |
1258 | return found; |
1259 | } | |
1260 | ||
a513088d | 1261 | static void |
d657e621 | 1262 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1263 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1264 | { |
56303d34 | 1265 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1266 | |
d657e621 | 1267 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1268 | if (orig_entry) { |
1269 | /* refresh the ttvn: the current value could be a bogus one that | |
1270 | * was added during a "temporary client detection" | |
1271 | */ | |
1272 | orig_entry->ttvn = ttvn; | |
d657e621 | 1273 | goto out; |
30cfd02b | 1274 | } |
d657e621 | 1275 | |
db08e6e5 SW |
1276 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1277 | if (!orig_entry) | |
d657e621 | 1278 | goto out; |
db08e6e5 SW |
1279 | |
1280 | INIT_HLIST_NODE(&orig_entry->list); | |
1281 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1282 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1283 | orig_entry->orig_node = orig_node; |
1284 | orig_entry->ttvn = ttvn; | |
d657e621 | 1285 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1286 | |
d657e621 | 1287 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1288 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1289 | &tt_global->orig_list); |
1290 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1291 | atomic_inc(&tt_global->orig_list_count); |
1292 | ||
d657e621 AQ |
1293 | out: |
1294 | if (orig_entry) | |
1295 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1296 | } |
1297 | ||
d4ff40f6 AQ |
1298 | /** |
1299 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1300 | * @bat_priv: the bat priv with all the soft interface information | |
1301 | * @orig_node: the originator announcing the client | |
1302 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1303 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1304 | * @flags: TT flags that have to be set for this non-mesh client |
1305 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1306 | * | |
1307 | * Add a new TT global entry for the given originator. If the entry already | |
1308 | * exists add a new reference to the given originator (a global entry can have | |
1309 | * references to multiple originators) and adjust the flags attribute to reflect | |
1310 | * the function argument. | |
1311 | * If a TT local entry exists for this non-mesh client remove it. | |
1312 | * | |
1313 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1314 | * |
1315 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1316 | */ |
1e5d49fc AQ |
1317 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1318 | struct batadv_orig_node *orig_node, | |
c018ad3d AQ |
1319 | const unsigned char *tt_addr, |
1320 | unsigned short vid, uint16_t flags, | |
1e5d49fc | 1321 | uint8_t ttvn) |
a73105b8 | 1322 | { |
170173bf SE |
1323 | struct batadv_tt_global_entry *tt_global_entry; |
1324 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1325 | bool ret = false; |
80b3f58c | 1326 | int hash_added; |
56303d34 | 1327 | struct batadv_tt_common_entry *common; |
7f91d06c | 1328 | uint16_t local_flags; |
c6c8fea2 | 1329 | |
cfd4f757 AQ |
1330 | /* ignore global entries from backbone nodes */ |
1331 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1332 | return true; | |
1333 | ||
c018ad3d AQ |
1334 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1335 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1336 | |
1337 | /* if the node already has a local client for this entry, it has to wait | |
1338 | * for a roaming advertisement instead of manually messing up the global | |
1339 | * table | |
1340 | */ | |
1341 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1342 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1343 | goto out; | |
a73105b8 AQ |
1344 | |
1345 | if (!tt_global_entry) { | |
d4f44692 | 1346 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1347 | if (!tt_global_entry) |
7683fdc1 AQ |
1348 | goto out; |
1349 | ||
c0a55929 | 1350 | common = &tt_global_entry->common; |
8fdd0153 | 1351 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1352 | common->vid = vid; |
db08e6e5 | 1353 | |
d4f44692 | 1354 | common->flags = flags; |
cc47f66e | 1355 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1356 | /* node must store current time in case of roaming. This is |
1357 | * needed to purge this entry out on timeout (if nobody claims | |
1358 | * it) | |
1359 | */ | |
1360 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1361 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1362 | atomic_set(&common->refcount, 2); |
30cfd02b | 1363 | common->added_at = jiffies; |
db08e6e5 SW |
1364 | |
1365 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1366 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1367 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1368 | |
807736f6 | 1369 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1370 | batadv_compare_tt, |
c018ad3d | 1371 | batadv_choose_tt, common, |
a513088d | 1372 | &common->hash_entry); |
80b3f58c SW |
1373 | |
1374 | if (unlikely(hash_added != 0)) { | |
1375 | /* remove the reference for the hash */ | |
a513088d | 1376 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1377 | goto out_remove; |
1378 | } | |
a73105b8 | 1379 | } else { |
068ee6e2 | 1380 | common = &tt_global_entry->common; |
30cfd02b AQ |
1381 | /* If there is already a global entry, we can use this one for |
1382 | * our processing. | |
068ee6e2 AQ |
1383 | * But if we are trying to add a temporary client then here are |
1384 | * two options at this point: | |
1385 | * 1) the global client is not a temporary client: the global | |
1386 | * client has to be left as it is, temporary information | |
1387 | * should never override any already known client state | |
1388 | * 2) the global client is a temporary client: purge the | |
1389 | * originator list and add the new one orig_entry | |
30cfd02b | 1390 | */ |
068ee6e2 AQ |
1391 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1392 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1393 | goto out; | |
1394 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1395 | orig_node)) | |
1396 | goto out_remove; | |
1397 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1398 | goto add_orig_entry; | |
1399 | } | |
30cfd02b AQ |
1400 | |
1401 | /* if the client was temporary added before receiving the first | |
1402 | * OGM announcing it, we have to clear the TEMP flag | |
1403 | */ | |
068ee6e2 | 1404 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 1405 | |
e9c00136 AQ |
1406 | /* the change can carry possible "attribute" flags like the |
1407 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1408 | * client entry | |
1409 | */ | |
1410 | tt_global_entry->common.flags |= flags; | |
1411 | ||
acd34afa SE |
1412 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1413 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1414 | * delete + roaming change for this originator. |
1415 | * | |
1416 | * We should first delete the old originator before adding the | |
1417 | * new one. | |
1418 | */ | |
068ee6e2 | 1419 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1420 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1421 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1422 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1423 | } |
1424 | } | |
068ee6e2 | 1425 | add_orig_entry: |
30cfd02b | 1426 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1427 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1428 | |
39c75a51 | 1429 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1430 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1431 | common->addr, BATADV_PRINT_VID(common->vid), | |
1432 | orig_node->orig); | |
1e5d49fc | 1433 | ret = true; |
c6c8fea2 | 1434 | |
80b3f58c | 1435 | out_remove: |
c5caf4ef LL |
1436 | /* Do not remove multicast addresses from the local hash on |
1437 | * global additions | |
1438 | */ | |
1439 | if (is_multicast_ether_addr(tt_addr)) | |
1440 | goto out; | |
7f91d06c | 1441 | |
a73105b8 | 1442 | /* remove address from local hash if present */ |
c018ad3d | 1443 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1444 | "global tt received", |
c1d07431 | 1445 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1446 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1447 | ||
068ee6e2 AQ |
1448 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1449 | /* this is a normal global add. Therefore the client is not in a | |
1450 | * roaming state anymore. | |
1451 | */ | |
1452 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1453 | ||
7683fdc1 AQ |
1454 | out: |
1455 | if (tt_global_entry) | |
a513088d | 1456 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1457 | if (tt_local_entry) |
1458 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1459 | return ret; |
c6c8fea2 SE |
1460 | } |
1461 | ||
1b371d13 SW |
1462 | /** |
1463 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1464 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1465 | * @tt_global_entry: global translation table entry to be analyzed |
1466 | * | |
1467 | * This functon assumes the caller holds rcu_read_lock(). | |
1468 | * Returns best originator list entry or NULL on errors. | |
1469 | */ | |
1470 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1471 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1472 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1473 | { |
4627456a AQ |
1474 | struct batadv_neigh_node *router, *best_router = NULL; |
1475 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1476 | struct hlist_head *head; |
981d8900 | 1477 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1478 | |
1479 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1480 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1481 | router = batadv_orig_router_get(orig_entry->orig_node, |
1482 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1483 | if (!router) |
1484 | continue; | |
1485 | ||
4627456a | 1486 | if (best_router && |
89652331 SW |
1487 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1488 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1489 | batadv_neigh_node_free_ref(router); |
1490 | continue; | |
981d8900 SE |
1491 | } |
1492 | ||
4627456a AQ |
1493 | /* release the refcount for the "old" best */ |
1494 | if (best_router) | |
1495 | batadv_neigh_node_free_ref(best_router); | |
1496 | ||
1497 | best_entry = orig_entry; | |
1498 | best_router = router; | |
981d8900 SE |
1499 | } |
1500 | ||
4627456a AQ |
1501 | if (best_router) |
1502 | batadv_neigh_node_free_ref(best_router); | |
1503 | ||
981d8900 SE |
1504 | return best_entry; |
1505 | } | |
1506 | ||
1b371d13 SW |
1507 | /** |
1508 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1509 | * for this global entry | |
4627456a | 1510 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1511 | * @tt_global_entry: global translation table entry to be printed |
1512 | * @seq: debugfs table seq_file struct | |
1513 | * | |
1514 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1515 | */ |
a513088d | 1516 | static void |
4627456a AQ |
1517 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1518 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1519 | struct seq_file *seq) |
db08e6e5 | 1520 | { |
981d8900 | 1521 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1522 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1523 | struct batadv_orig_node_vlan *vlan; |
1524 | struct hlist_head *head; | |
db08e6e5 | 1525 | uint8_t last_ttvn; |
7ea7b4a1 | 1526 | uint16_t flags; |
db08e6e5 SW |
1527 | |
1528 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1529 | flags = tt_common_entry->flags; |
1530 | ||
4627456a | 1531 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1532 | if (best_entry) { |
7ea7b4a1 AQ |
1533 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1534 | tt_common_entry->vid); | |
1535 | if (!vlan) { | |
1536 | seq_printf(seq, | |
1537 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1538 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1539 | best_entry->orig_node->orig); | |
1540 | goto print_list; | |
1541 | } | |
1542 | ||
981d8900 | 1543 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1544 | seq_printf(seq, |
dd24ddb2 | 1545 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1546 | '*', tt_global_entry->common.addr, |
16052789 | 1547 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1548 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1549 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1550 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1551 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1552 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1553 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1554 | |
1555 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1556 | } |
db08e6e5 | 1557 | |
7ea7b4a1 | 1558 | print_list: |
db08e6e5 SW |
1559 | head = &tt_global_entry->orig_list; |
1560 | ||
b67bfe0d | 1561 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1562 | if (best_entry == orig_entry) |
1563 | continue; | |
1564 | ||
7ea7b4a1 AQ |
1565 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1566 | tt_common_entry->vid); | |
1567 | if (!vlan) { | |
1568 | seq_printf(seq, | |
1569 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1570 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1571 | orig_entry->orig_node->orig); | |
1572 | continue; | |
1573 | } | |
1574 | ||
db08e6e5 | 1575 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1576 | seq_printf(seq, |
dd24ddb2 | 1577 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1578 | '+', tt_global_entry->common.addr, |
16052789 | 1579 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1580 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1581 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1582 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1583 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1584 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1585 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1586 | |
1587 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1588 | } |
1589 | } | |
1590 | ||
08c36d3e | 1591 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1592 | { |
1593 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1594 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1595 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1596 | struct batadv_tt_common_entry *tt_common_entry; |
1597 | struct batadv_tt_global_entry *tt_global; | |
1598 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1599 | struct hlist_head *head; |
c90681b8 | 1600 | uint32_t i; |
c6c8fea2 | 1601 | |
30da63a6 ML |
1602 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1603 | if (!primary_if) | |
32ae9b22 | 1604 | goto out; |
c6c8fea2 | 1605 | |
2dafb49d AQ |
1606 | seq_printf(seq, |
1607 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1608 | net_dev->name); |
16052789 AQ |
1609 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1610 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1611 | "CRC", "Flags"); | |
c6c8fea2 | 1612 | |
c6c8fea2 SE |
1613 | for (i = 0; i < hash->size; i++) { |
1614 | head = &hash->table[i]; | |
1615 | ||
7aadf889 | 1616 | rcu_read_lock(); |
b67bfe0d | 1617 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1618 | head, hash_entry) { |
56303d34 SE |
1619 | tt_global = container_of(tt_common_entry, |
1620 | struct batadv_tt_global_entry, | |
1621 | common); | |
4627456a | 1622 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1623 | } |
7aadf889 | 1624 | rcu_read_unlock(); |
c6c8fea2 | 1625 | } |
32ae9b22 ML |
1626 | out: |
1627 | if (primary_if) | |
e5d89254 | 1628 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1629 | return 0; |
c6c8fea2 SE |
1630 | } |
1631 | ||
1d8ab8d3 LL |
1632 | /** |
1633 | * batadv_tt_global_del_orig_entry - remove and free an orig_entry | |
1634 | * @tt_global_entry: the global entry to remove the orig_entry from | |
1635 | * @orig_entry: the orig entry to remove and free | |
1636 | * | |
1637 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1638 | * free this orig_entry afterwards. | |
1639 | */ | |
1640 | static void | |
1641 | batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, | |
1642 | struct batadv_tt_orig_list_entry *orig_entry) | |
1643 | { | |
1644 | batadv_tt_global_size_dec(orig_entry->orig_node, | |
1645 | tt_global_entry->common.vid); | |
1646 | atomic_dec(&tt_global_entry->orig_list_count); | |
1647 | hlist_del_rcu(&orig_entry->list); | |
1648 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1649 | } | |
1650 | ||
db08e6e5 | 1651 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1652 | static void |
56303d34 | 1653 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1654 | { |
db08e6e5 | 1655 | struct hlist_head *head; |
b67bfe0d | 1656 | struct hlist_node *safe; |
56303d34 | 1657 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1658 | |
db08e6e5 SW |
1659 | spin_lock_bh(&tt_global_entry->list_lock); |
1660 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 LL |
1661 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
1662 | batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); | |
db08e6e5 | 1663 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1664 | } |
1665 | ||
1d8ab8d3 LL |
1666 | /** |
1667 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1668 | * @bat_priv: the bat priv with all the soft interface information | |
1669 | * @tt_global_entry: the global entry to remove the orig_node from | |
1670 | * @orig_node: the originator announcing the client | |
1671 | * @message: message to append to the log on deletion | |
1672 | * | |
1673 | * Remove the given orig_node and its according orig_entry from the given | |
1674 | * global tt entry. | |
1675 | */ | |
a513088d | 1676 | static void |
1d8ab8d3 LL |
1677 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1678 | struct batadv_tt_global_entry *tt_global_entry, | |
1679 | struct batadv_orig_node *orig_node, | |
1680 | const char *message) | |
db08e6e5 SW |
1681 | { |
1682 | struct hlist_head *head; | |
b67bfe0d | 1683 | struct hlist_node *safe; |
56303d34 | 1684 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1685 | unsigned short vid; |
db08e6e5 SW |
1686 | |
1687 | spin_lock_bh(&tt_global_entry->list_lock); | |
1688 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1689 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1690 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1691 | vid = tt_global_entry->common.vid; |
39c75a51 | 1692 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1693 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1694 | orig_node->orig, |
16052789 AQ |
1695 | tt_global_entry->common.addr, |
1696 | BATADV_PRINT_VID(vid), message); | |
1d8ab8d3 LL |
1697 | batadv_tt_global_del_orig_entry(tt_global_entry, |
1698 | orig_entry); | |
db08e6e5 SW |
1699 | } |
1700 | } | |
1701 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1702 | } | |
1703 | ||
db08e6e5 | 1704 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1705 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1706 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1707 | */ |
a513088d | 1708 | static void |
56303d34 SE |
1709 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1710 | struct batadv_tt_global_entry *tt_global_entry, | |
1711 | struct batadv_orig_node *orig_node, | |
1712 | const char *message) | |
db08e6e5 SW |
1713 | { |
1714 | bool last_entry = true; | |
1715 | struct hlist_head *head; | |
56303d34 | 1716 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1717 | |
1718 | /* no local entry exists, case 1: | |
1719 | * Check if this is the last one or if other entries exist. | |
1720 | */ | |
1721 | ||
1722 | rcu_read_lock(); | |
1723 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1724 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1725 | if (orig_entry->orig_node != orig_node) { |
1726 | last_entry = false; | |
1727 | break; | |
1728 | } | |
1729 | } | |
1730 | rcu_read_unlock(); | |
1731 | ||
1732 | if (last_entry) { | |
1733 | /* its the last one, mark for roaming. */ | |
acd34afa | 1734 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1735 | tt_global_entry->roam_at = jiffies; |
1736 | } else | |
1737 | /* there is another entry, we can simply delete this | |
1738 | * one and can still use the other one. | |
1739 | */ | |
1d8ab8d3 LL |
1740 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1741 | orig_node, message); | |
db08e6e5 SW |
1742 | } |
1743 | ||
c018ad3d AQ |
1744 | /** |
1745 | * batadv_tt_global_del - remove a client from the global table | |
1746 | * @bat_priv: the bat priv with all the soft interface information | |
1747 | * @orig_node: an originator serving this client | |
1748 | * @addr: the mac address of the client | |
1749 | * @vid: VLAN identifier | |
1750 | * @message: a message explaining the reason for deleting the client to print | |
1751 | * for debugging purpose | |
1752 | * @roaming: true if the deletion has been triggered by a roaming event | |
1753 | */ | |
56303d34 SE |
1754 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1755 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1756 | const unsigned char *addr, unsigned short vid, |
a513088d | 1757 | const char *message, bool roaming) |
a73105b8 | 1758 | { |
170173bf | 1759 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1760 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1761 | |
c018ad3d | 1762 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1763 | if (!tt_global_entry) |
7683fdc1 | 1764 | goto out; |
a73105b8 | 1765 | |
db08e6e5 | 1766 | if (!roaming) { |
1d8ab8d3 LL |
1767 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1768 | orig_node, message); | |
db08e6e5 SW |
1769 | |
1770 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1771 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1772 | message); | |
db08e6e5 SW |
1773 | |
1774 | goto out; | |
1775 | } | |
92f90f56 SE |
1776 | |
1777 | /* if we are deleting a global entry due to a roam | |
1778 | * event, there are two possibilities: | |
db08e6e5 SW |
1779 | * 1) the client roamed from node A to node B => if there |
1780 | * is only one originator left for this client, we mark | |
acd34afa | 1781 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1782 | * wait for node B to claim it. In case of timeout |
1783 | * the entry is purged. | |
db08e6e5 SW |
1784 | * |
1785 | * If there are other originators left, we directly delete | |
1786 | * the originator. | |
92f90f56 | 1787 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1788 | * the global entry, since it is useless now. |
1789 | */ | |
a513088d | 1790 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1791 | tt_global_entry->common.addr, |
1792 | vid); | |
a513088d | 1793 | if (local_entry) { |
db08e6e5 | 1794 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1795 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1796 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1797 | } else |
1798 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1799 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1800 | orig_node, message); | |
92f90f56 | 1801 | |
cc47f66e | 1802 | out: |
7683fdc1 | 1803 | if (tt_global_entry) |
a513088d SE |
1804 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1805 | if (local_entry) | |
1806 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1807 | } |
1808 | ||
95fb130d AQ |
1809 | /** |
1810 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1811 | * given originator matching the provided vid | |
1812 | * @bat_priv: the bat priv with all the soft interface information | |
1813 | * @orig_node: the originator owning the entries to remove | |
1814 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1815 | * removed | |
1816 | * @message: debug message to print as "reason" | |
1817 | */ | |
56303d34 SE |
1818 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1819 | struct batadv_orig_node *orig_node, | |
95fb130d | 1820 | int32_t match_vid, |
56303d34 | 1821 | const char *message) |
c6c8fea2 | 1822 | { |
56303d34 SE |
1823 | struct batadv_tt_global_entry *tt_global; |
1824 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1825 | uint32_t i; |
807736f6 | 1826 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1827 | struct hlist_node *safe; |
a73105b8 | 1828 | struct hlist_head *head; |
7683fdc1 | 1829 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1830 | unsigned short vid; |
c6c8fea2 | 1831 | |
6e801494 SW |
1832 | if (!hash) |
1833 | return; | |
1834 | ||
a73105b8 AQ |
1835 | for (i = 0; i < hash->size; i++) { |
1836 | head = &hash->table[i]; | |
7683fdc1 | 1837 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1838 | |
7683fdc1 | 1839 | spin_lock_bh(list_lock); |
b67bfe0d | 1840 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1841 | head, hash_entry) { |
95fb130d AQ |
1842 | /* remove only matching entries */ |
1843 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1844 | continue; | |
1845 | ||
56303d34 SE |
1846 | tt_global = container_of(tt_common_entry, |
1847 | struct batadv_tt_global_entry, | |
1848 | common); | |
db08e6e5 | 1849 | |
1d8ab8d3 LL |
1850 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1851 | orig_node, message); | |
db08e6e5 | 1852 | |
56303d34 | 1853 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1854 | vid = tt_global->common.vid; |
39c75a51 | 1855 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1856 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1857 | tt_global->common.addr, | |
1858 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1859 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1860 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1861 | } |
a73105b8 | 1862 | } |
7683fdc1 | 1863 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1864 | } |
e17931d1 | 1865 | orig_node->capa_initialized &= ~BATADV_ORIG_CAPA_HAS_TT; |
c6c8fea2 SE |
1866 | } |
1867 | ||
30cfd02b AQ |
1868 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1869 | char **msg) | |
cc47f66e | 1870 | { |
30cfd02b AQ |
1871 | bool purge = false; |
1872 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1873 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1874 | |
30cfd02b AQ |
1875 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1876 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1877 | purge = true; | |
1878 | *msg = "Roaming timeout\n"; | |
1879 | } | |
42d0b044 | 1880 | |
30cfd02b AQ |
1881 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1882 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1883 | purge = true; | |
1884 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1885 | } |
30cfd02b AQ |
1886 | |
1887 | return purge; | |
42d0b044 SE |
1888 | } |
1889 | ||
30cfd02b | 1890 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1891 | { |
807736f6 | 1892 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1893 | struct hlist_head *head; |
b67bfe0d | 1894 | struct hlist_node *node_tmp; |
7683fdc1 | 1895 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1896 | uint32_t i; |
30cfd02b AQ |
1897 | char *msg = NULL; |
1898 | struct batadv_tt_common_entry *tt_common; | |
1899 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1900 | |
cc47f66e AQ |
1901 | for (i = 0; i < hash->size; i++) { |
1902 | head = &hash->table[i]; | |
7683fdc1 | 1903 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1904 | |
7683fdc1 | 1905 | spin_lock_bh(list_lock); |
b67bfe0d | 1906 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1907 | hash_entry) { |
1908 | tt_global = container_of(tt_common, | |
1909 | struct batadv_tt_global_entry, | |
1910 | common); | |
1911 | ||
1912 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1913 | continue; | |
1914 | ||
1915 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1916 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1917 | tt_global->common.addr, | |
1918 | BATADV_PRINT_VID(tt_global->common.vid), | |
1919 | msg); | |
30cfd02b | 1920 | |
b67bfe0d | 1921 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1922 | |
1923 | batadv_tt_global_entry_free_ref(tt_global); | |
1924 | } | |
7683fdc1 | 1925 | spin_unlock_bh(list_lock); |
cc47f66e | 1926 | } |
cc47f66e AQ |
1927 | } |
1928 | ||
56303d34 | 1929 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1930 | { |
5bf74e9c | 1931 | struct batadv_hashtable *hash; |
7683fdc1 | 1932 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1933 | struct batadv_tt_common_entry *tt_common_entry; |
1934 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1935 | struct hlist_node *node_tmp; |
7683fdc1 | 1936 | struct hlist_head *head; |
c90681b8 | 1937 | uint32_t i; |
7683fdc1 | 1938 | |
807736f6 | 1939 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1940 | return; |
1941 | ||
807736f6 | 1942 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1943 | |
1944 | for (i = 0; i < hash->size; i++) { | |
1945 | head = &hash->table[i]; | |
1946 | list_lock = &hash->list_locks[i]; | |
1947 | ||
1948 | spin_lock_bh(list_lock); | |
b67bfe0d | 1949 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1950 | head, hash_entry) { |
b67bfe0d | 1951 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1952 | tt_global = container_of(tt_common_entry, |
1953 | struct batadv_tt_global_entry, | |
1954 | common); | |
1955 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1956 | } |
1957 | spin_unlock_bh(list_lock); | |
1958 | } | |
1959 | ||
1a8eaf07 | 1960 | batadv_hash_destroy(hash); |
7683fdc1 | 1961 | |
807736f6 | 1962 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1963 | } |
1964 | ||
56303d34 SE |
1965 | static bool |
1966 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1967 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1968 | { |
1969 | bool ret = false; | |
1970 | ||
acd34afa SE |
1971 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1972 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1973 | ret = true; |
1974 | ||
2d2fcc2a AQ |
1975 | /* check if the two clients are marked as isolated */ |
1976 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
1977 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
1978 | ret = true; | |
1979 | ||
59b699cd AQ |
1980 | return ret; |
1981 | } | |
1982 | ||
c018ad3d AQ |
1983 | /** |
1984 | * batadv_transtable_search - get the mesh destination for a given client | |
1985 | * @bat_priv: the bat priv with all the soft interface information | |
1986 | * @src: mac address of the source client | |
1987 | * @addr: mac address of the destination client | |
1988 | * @vid: VLAN identifier | |
1989 | * | |
1990 | * Returns a pointer to the originator that was selected as destination in the | |
1991 | * mesh for contacting the client 'addr', NULL otherwise. | |
1992 | * In case of multiple originators serving the same client, the function returns | |
1993 | * the best one (best in terms of metric towards the destination node). | |
1994 | * | |
1995 | * If the two clients are AP isolated the function returns NULL. | |
1996 | */ | |
56303d34 SE |
1997 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1998 | const uint8_t *src, | |
c018ad3d AQ |
1999 | const uint8_t *addr, |
2000 | unsigned short vid) | |
c6c8fea2 | 2001 | { |
56303d34 SE |
2002 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2003 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2004 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2005 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2006 | |
eceb22ae | 2007 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2008 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2009 | if (!tt_local_entry || |
2010 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2011 | goto out; |
2012 | } | |
7aadf889 | 2013 | |
c018ad3d | 2014 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2015 | if (!tt_global_entry) |
7b36e8ee | 2016 | goto out; |
7aadf889 | 2017 | |
3d393e47 | 2018 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2019 | * isolation |
2020 | */ | |
a513088d SE |
2021 | if (tt_local_entry && |
2022 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2023 | goto out; |
2024 | ||
db08e6e5 | 2025 | rcu_read_lock(); |
4627456a | 2026 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2027 | /* found anything? */ |
981d8900 SE |
2028 | if (best_entry) |
2029 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
2030 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
2031 | orig_node = NULL; | |
2032 | rcu_read_unlock(); | |
981d8900 | 2033 | |
7b36e8ee | 2034 | out: |
3d393e47 | 2035 | if (tt_global_entry) |
a513088d | 2036 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 2037 | if (tt_local_entry) |
a513088d | 2038 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 2039 | |
7b36e8ee | 2040 | return orig_node; |
c6c8fea2 | 2041 | } |
a73105b8 | 2042 | |
ced72933 AQ |
2043 | /** |
2044 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2045 | * to the given orig_node | |
2046 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2047 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2048 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2049 | * |
2050 | * This function computes the checksum for the global table corresponding to a | |
2051 | * specific originator. In particular, the checksum is computed as follows: For | |
2052 | * each client connected to the originator the CRC32C of the MAC address and the | |
2053 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2054 | * together. | |
2055 | * | |
2056 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2057 | * produce a unique hash of the table, but since the order which is used to feed | |
2058 | * the CRC32C function affects the result and since every node in the network | |
2059 | * probably sorts the clients differently, the hash function cannot be directly | |
2060 | * computed over the entire table. Hence the CRC32C is used only on | |
2061 | * the single client entry, while all the results are then xor'ed together | |
2062 | * because the XOR operation can combine them all while trying to reduce the | |
2063 | * noise as much as possible. | |
2064 | * | |
2065 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
2066 | */ |
2067 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
7ea7b4a1 AQ |
2068 | struct batadv_orig_node *orig_node, |
2069 | unsigned short vid) | |
a73105b8 | 2070 | { |
807736f6 | 2071 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2072 | struct batadv_tt_common_entry *tt_common; |
2073 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2074 | struct hlist_head *head; |
0ffa9e8d | 2075 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2076 | uint8_t flags; |
a30e22ca | 2077 | __be16 tmp_vid; |
a73105b8 AQ |
2078 | |
2079 | for (i = 0; i < hash->size; i++) { | |
2080 | head = &hash->table[i]; | |
2081 | ||
2082 | rcu_read_lock(); | |
b67bfe0d | 2083 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2084 | tt_global = container_of(tt_common, |
2085 | struct batadv_tt_global_entry, | |
2086 | common); | |
7ea7b4a1 AQ |
2087 | /* compute the CRC only for entries belonging to the |
2088 | * VLAN identified by the vid passed as parameter | |
2089 | */ | |
2090 | if (tt_common->vid != vid) | |
2091 | continue; | |
2092 | ||
db08e6e5 SW |
2093 | /* Roaming clients are in the global table for |
2094 | * consistency only. They don't have to be | |
2095 | * taken into account while computing the | |
2096 | * global crc | |
2097 | */ | |
acd34afa | 2098 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2099 | continue; |
30cfd02b AQ |
2100 | /* Temporary clients have not been announced yet, so |
2101 | * they have to be skipped while computing the global | |
2102 | * crc | |
2103 | */ | |
2104 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2105 | continue; | |
db08e6e5 SW |
2106 | |
2107 | /* find out if this global entry is announced by this | |
2108 | * originator | |
2109 | */ | |
56303d34 | 2110 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2111 | orig_node)) |
db08e6e5 SW |
2112 | continue; |
2113 | ||
a30e22ca AQ |
2114 | /* use network order to read the VID: this ensures that |
2115 | * every node reads the bytes in the same order. | |
2116 | */ | |
2117 | tmp_vid = htons(tt_common->vid); | |
2118 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2119 | |
2120 | /* compute the CRC on flags that have to be kept in sync | |
2121 | * among nodes | |
2122 | */ | |
2123 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2124 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2125 | ||
0ffa9e8d | 2126 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2127 | } |
2128 | rcu_read_unlock(); | |
2129 | } | |
2130 | ||
ced72933 | 2131 | return crc; |
a73105b8 AQ |
2132 | } |
2133 | ||
ced72933 AQ |
2134 | /** |
2135 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2136 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2137 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2138 | * |
2139 | * For details about the computation, please refer to the documentation for | |
2140 | * batadv_tt_global_crc(). | |
2141 | * | |
2142 | * Returns the checksum of the local table | |
ced72933 | 2143 | */ |
7ea7b4a1 AQ |
2144 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2145 | unsigned short vid) | |
a73105b8 | 2146 | { |
807736f6 | 2147 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2148 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2149 | struct hlist_head *head; |
0ffa9e8d | 2150 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2151 | uint8_t flags; |
a30e22ca | 2152 | __be16 tmp_vid; |
a73105b8 AQ |
2153 | |
2154 | for (i = 0; i < hash->size; i++) { | |
2155 | head = &hash->table[i]; | |
2156 | ||
2157 | rcu_read_lock(); | |
b67bfe0d | 2158 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2159 | /* compute the CRC only for entries belonging to the |
2160 | * VLAN identified by vid | |
2161 | */ | |
2162 | if (tt_common->vid != vid) | |
2163 | continue; | |
2164 | ||
058d0e26 | 2165 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2166 | * account while computing the CRC |
2167 | */ | |
acd34afa | 2168 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2169 | continue; |
ced72933 | 2170 | |
a30e22ca AQ |
2171 | /* use network order to read the VID: this ensures that |
2172 | * every node reads the bytes in the same order. | |
2173 | */ | |
2174 | tmp_vid = htons(tt_common->vid); | |
2175 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2176 | |
2177 | /* compute the CRC on flags that have to be kept in sync | |
2178 | * among nodes | |
2179 | */ | |
2180 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2181 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2182 | ||
0ffa9e8d | 2183 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2184 | } |
a73105b8 AQ |
2185 | rcu_read_unlock(); |
2186 | } | |
2187 | ||
ced72933 | 2188 | return crc; |
a73105b8 AQ |
2189 | } |
2190 | ||
56303d34 | 2191 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2192 | { |
56303d34 | 2193 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2194 | |
807736f6 | 2195 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2196 | |
807736f6 | 2197 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
2198 | list_del(&node->list); |
2199 | kfree(node); | |
2200 | } | |
2201 | ||
807736f6 | 2202 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2203 | } |
2204 | ||
56303d34 SE |
2205 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2206 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
2207 | const void *tt_buff, |
2208 | uint16_t tt_buff_len) | |
a73105b8 | 2209 | { |
a73105b8 | 2210 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2211 | * last OGM (the OGM could carry no changes) |
2212 | */ | |
a73105b8 AQ |
2213 | spin_lock_bh(&orig_node->tt_buff_lock); |
2214 | if (tt_buff_len > 0) { | |
2215 | kfree(orig_node->tt_buff); | |
2216 | orig_node->tt_buff_len = 0; | |
2217 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2218 | if (orig_node->tt_buff) { | |
2219 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2220 | orig_node->tt_buff_len = tt_buff_len; | |
2221 | } | |
2222 | } | |
2223 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2224 | } | |
2225 | ||
56303d34 | 2226 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2227 | { |
56303d34 | 2228 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2229 | |
807736f6 SE |
2230 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2231 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
2232 | if (batadv_has_timed_out(node->issued_at, |
2233 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
2234 | list_del(&node->list); |
2235 | kfree(node); | |
2236 | } | |
2237 | } | |
807736f6 | 2238 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2239 | } |
2240 | ||
2241 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
2242 | * has already been issued for this orig_node, NULL otherwise |
2243 | */ | |
56303d34 SE |
2244 | static struct batadv_tt_req_node * |
2245 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
2246 | struct batadv_orig_node *orig_node) | |
a73105b8 | 2247 | { |
56303d34 | 2248 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2249 | |
807736f6 SE |
2250 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2251 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
2252 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2253 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2254 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2255 | goto unlock; |
2256 | } | |
2257 | ||
2258 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2259 | if (!tt_req_node) | |
2260 | goto unlock; | |
2261 | ||
8fdd0153 | 2262 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2263 | tt_req_node->issued_at = jiffies; |
2264 | ||
807736f6 | 2265 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2266 | unlock: |
807736f6 | 2267 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2268 | return tt_req_node; |
2269 | } | |
2270 | ||
335fbe0f ML |
2271 | /** |
2272 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2273 | * @entry_ptr: to be checked local tt entry | |
2274 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2275 | * | |
2276 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2277 | */ | |
2278 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2279 | { |
56303d34 | 2280 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2281 | |
acd34afa | 2282 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2283 | return 0; |
2284 | return 1; | |
2285 | } | |
2286 | ||
a513088d SE |
2287 | static int batadv_tt_global_valid(const void *entry_ptr, |
2288 | const void *data_ptr) | |
a73105b8 | 2289 | { |
56303d34 SE |
2290 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2291 | const struct batadv_tt_global_entry *tt_global_entry; | |
2292 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2293 | |
30cfd02b AQ |
2294 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2295 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2296 | return 0; |
2297 | ||
56303d34 SE |
2298 | tt_global_entry = container_of(tt_common_entry, |
2299 | struct batadv_tt_global_entry, | |
48100bac AQ |
2300 | common); |
2301 | ||
a513088d | 2302 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2303 | } |
2304 | ||
335fbe0f | 2305 | /** |
7ea7b4a1 AQ |
2306 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2307 | * specified tt hash | |
335fbe0f ML |
2308 | * @bat_priv: the bat priv with all the soft interface information |
2309 | * @hash: hash table containing the tt entries | |
2310 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2311 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2312 | * @valid_cb: function to filter tt change entries |
2313 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2314 | */ |
7ea7b4a1 AQ |
2315 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2316 | struct batadv_hashtable *hash, | |
2317 | void *tvlv_buff, uint16_t tt_len, | |
2318 | int (*valid_cb)(const void *, const void *), | |
2319 | void *cb_data) | |
a73105b8 | 2320 | { |
56303d34 | 2321 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2322 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2323 | struct hlist_head *head; |
335fbe0f | 2324 | uint16_t tt_tot, tt_num_entries = 0; |
c90681b8 | 2325 | uint32_t i; |
a73105b8 | 2326 | |
298e6e68 | 2327 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2328 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2329 | |
2330 | rcu_read_lock(); | |
2331 | for (i = 0; i < hash->size; i++) { | |
2332 | head = &hash->table[i]; | |
2333 | ||
b67bfe0d | 2334 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2335 | head, hash_entry) { |
335fbe0f | 2336 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2337 | break; |
2338 | ||
48100bac | 2339 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2340 | continue; |
2341 | ||
8fdd0153 | 2342 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2343 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2344 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2345 | memset(tt_change->reserved, 0, |
2346 | sizeof(tt_change->reserved)); | |
a73105b8 | 2347 | |
335fbe0f | 2348 | tt_num_entries++; |
a73105b8 AQ |
2349 | tt_change++; |
2350 | } | |
2351 | } | |
2352 | rcu_read_unlock(); | |
7ea7b4a1 | 2353 | } |
a73105b8 | 2354 | |
7ea7b4a1 AQ |
2355 | /** |
2356 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2357 | * @orig_node: originator for which the CRCs have to be checked | |
2358 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2359 | * @num_vlan: number of tvlv VLAN entries | |
2360 | * @create: if true, create VLAN objects if not found | |
2361 | * | |
2362 | * Return true if all the received CRCs match the locally stored ones, false | |
2363 | * otherwise | |
2364 | */ | |
2365 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2366 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2367 | uint16_t num_vlan) | |
2368 | { | |
2369 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2370 | struct batadv_orig_node_vlan *vlan; | |
91c2b1a9 | 2371 | uint32_t crc; |
7ea7b4a1 AQ |
2372 | int i; |
2373 | ||
2374 | /* check if each received CRC matches the locally stored one */ | |
2375 | for (i = 0; i < num_vlan; i++) { | |
2376 | tt_vlan_tmp = tt_vlan + i; | |
2377 | ||
2378 | /* if orig_node is a backbone node for this VLAN, don't check | |
2379 | * the CRC as we ignore all the global entries over it | |
2380 | */ | |
2381 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2382 | orig_node->orig, |
2383 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2384 | continue; |
2385 | ||
2386 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2387 | ntohs(tt_vlan_tmp->vid)); | |
2388 | if (!vlan) | |
2389 | return false; | |
2390 | ||
91c2b1a9 AQ |
2391 | crc = vlan->tt.crc; |
2392 | batadv_orig_node_vlan_free_ref(vlan); | |
2393 | ||
2394 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2395 | return false; |
2396 | } | |
2397 | ||
2398 | return true; | |
2399 | } | |
2400 | ||
2401 | /** | |
2402 | * batadv_tt_local_update_crc - update all the local CRCs | |
2403 | * @bat_priv: the bat priv with all the soft interface information | |
2404 | */ | |
2405 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2406 | { | |
2407 | struct batadv_softif_vlan *vlan; | |
2408 | ||
2409 | /* recompute the global CRC for each VLAN */ | |
2410 | rcu_read_lock(); | |
2411 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2412 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2413 | } | |
2414 | rcu_read_unlock(); | |
2415 | } | |
2416 | ||
2417 | /** | |
2418 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2419 | * @bat_priv: the bat priv with all the soft interface information | |
2420 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2421 | */ | |
2422 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2423 | struct batadv_orig_node *orig_node) | |
2424 | { | |
2425 | struct batadv_orig_node_vlan *vlan; | |
2426 | uint32_t crc; | |
2427 | ||
2428 | /* recompute the global CRC for each VLAN */ | |
2429 | rcu_read_lock(); | |
2430 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
2431 | /* if orig_node is a backbone node for this VLAN, don't compute | |
2432 | * the CRC as we ignore all the global entries over it | |
2433 | */ | |
cfd4f757 AQ |
2434 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2435 | vlan->vid)) | |
7ea7b4a1 AQ |
2436 | continue; |
2437 | ||
2438 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2439 | vlan->tt.crc = crc; | |
2440 | } | |
2441 | rcu_read_unlock(); | |
a73105b8 AQ |
2442 | } |
2443 | ||
ced72933 AQ |
2444 | /** |
2445 | * batadv_send_tt_request - send a TT Request message to a given node | |
2446 | * @bat_priv: the bat priv with all the soft interface information | |
2447 | * @dst_orig_node: the destination of the message | |
2448 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2449 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2450 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2451 | * @full_table: ask for the entire translation table if true, while only for the |
2452 | * last TT diff otherwise | |
2453 | */ | |
56303d34 SE |
2454 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2455 | struct batadv_orig_node *dst_orig_node, | |
7ea7b4a1 AQ |
2456 | uint8_t ttvn, |
2457 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2458 | uint16_t num_vlan, bool full_table) | |
a73105b8 | 2459 | { |
335fbe0f | 2460 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2461 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2462 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2463 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2464 | bool ret = false; |
7ea7b4a1 | 2465 | int i, size; |
a73105b8 | 2466 | |
e5d89254 | 2467 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2468 | if (!primary_if) |
2469 | goto out; | |
2470 | ||
2471 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2472 | * reply from the same orig_node yet |
2473 | */ | |
a513088d | 2474 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
2475 | if (!tt_req_node) |
2476 | goto out; | |
2477 | ||
7ea7b4a1 AQ |
2478 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2479 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2480 | if (!tvlv_tt_data) |
a73105b8 AQ |
2481 | goto out; |
2482 | ||
335fbe0f ML |
2483 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2484 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2485 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2486 | ||
2487 | /* send all the CRCs within the request. This is needed by intermediate | |
2488 | * nodes to ensure they have the correct table before replying | |
2489 | */ | |
2490 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2491 | for (i = 0; i < num_vlan; i++) { | |
2492 | tt_vlan_req->vid = tt_vlan->vid; | |
2493 | tt_vlan_req->crc = tt_vlan->crc; | |
2494 | ||
2495 | tt_vlan_req++; | |
2496 | tt_vlan++; | |
2497 | } | |
a73105b8 AQ |
2498 | |
2499 | if (full_table) | |
335fbe0f | 2500 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2501 | |
bb351ba0 | 2502 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2503 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2504 | |
d69909d2 | 2505 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2506 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2507 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2508 | tvlv_tt_data, size); |
335fbe0f | 2509 | ret = true; |
a73105b8 AQ |
2510 | |
2511 | out: | |
a73105b8 | 2512 | if (primary_if) |
e5d89254 | 2513 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2514 | if (ret && tt_req_node) { |
807736f6 | 2515 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2516 | list_del(&tt_req_node->list); |
807736f6 | 2517 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2518 | kfree(tt_req_node); |
2519 | } | |
335fbe0f | 2520 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2521 | return ret; |
2522 | } | |
2523 | ||
335fbe0f ML |
2524 | /** |
2525 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2526 | * node's translation table | |
2527 | * @bat_priv: the bat priv with all the soft interface information | |
2528 | * @tt_data: tt data containing the tt request information | |
2529 | * @req_src: mac address of tt request sender | |
2530 | * @req_dst: mac address of tt request recipient | |
2531 | * | |
2532 | * Returns true if tt request reply was sent, false otherwise. | |
2533 | */ | |
2534 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2535 | struct batadv_tvlv_tt_data *tt_data, | |
2536 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2537 | { |
170173bf | 2538 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2539 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2540 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2541 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2542 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2543 | bool ret = false, full_table; |
7ea7b4a1 AQ |
2544 | uint8_t orig_ttvn, req_ttvn; |
2545 | uint16_t tvlv_len; | |
2546 | int32_t tt_len; | |
a73105b8 | 2547 | |
39c75a51 | 2548 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2549 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 2550 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 2551 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
2552 | |
2553 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2554 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2555 | if (!req_dst_orig_node) |
2556 | goto out; | |
2557 | ||
335fbe0f | 2558 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2559 | if (!res_dst_orig_node) |
2560 | goto out; | |
2561 | ||
a73105b8 | 2562 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2563 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2564 | |
7ea7b4a1 | 2565 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2566 | /* this node doesn't have the requested data */ |
a73105b8 | 2567 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2568 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2569 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2570 | goto out; |
2571 | ||
015758d0 | 2572 | /* If the full table has been explicitly requested */ |
335fbe0f | 2573 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2574 | !req_dst_orig_node->tt_buff) |
2575 | full_table = true; | |
2576 | else | |
2577 | full_table = false; | |
2578 | ||
335fbe0f ML |
2579 | /* TT fragmentation hasn't been implemented yet, so send as many |
2580 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2581 | */ |
a73105b8 AQ |
2582 | if (!full_table) { |
2583 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2584 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2585 | |
7ea7b4a1 AQ |
2586 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2587 | &tvlv_tt_data, | |
2588 | &tt_change, | |
2589 | &tt_len); | |
2590 | if (!tt_len) | |
a73105b8 AQ |
2591 | goto unlock; |
2592 | ||
a73105b8 | 2593 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2594 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2595 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2596 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2597 | } else { | |
7ea7b4a1 AQ |
2598 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2599 | * in the initial part | |
2600 | */ | |
2601 | tt_len = -1; | |
2602 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2603 | &tvlv_tt_data, | |
2604 | &tt_change, | |
2605 | &tt_len); | |
2606 | if (!tt_len) | |
a73105b8 | 2607 | goto out; |
7ea7b4a1 AQ |
2608 | |
2609 | /* fill the rest of the tvlv with the real TT entries */ | |
2610 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2611 | tt_change, tt_len, | |
2612 | batadv_tt_global_valid, | |
2613 | req_dst_orig_node); | |
a73105b8 AQ |
2614 | } |
2615 | ||
a19d3d85 ML |
2616 | /* Don't send the response, if larger than fragmented packet. */ |
2617 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2618 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2619 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2620 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2621 | res_dst_orig_node->orig); | |
2622 | goto out; | |
2623 | } | |
2624 | ||
335fbe0f ML |
2625 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2626 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2627 | |
2628 | if (full_table) | |
335fbe0f | 2629 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2630 | |
39c75a51 | 2631 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2632 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2633 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2634 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2635 | |
d69909d2 | 2636 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2637 | |
335fbe0f | 2638 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2639 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2640 | tvlv_len); | |
e91ecfc6 | 2641 | |
335fbe0f | 2642 | ret = true; |
a73105b8 AQ |
2643 | goto out; |
2644 | ||
2645 | unlock: | |
2646 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2647 | ||
2648 | out: | |
2649 | if (res_dst_orig_node) | |
7d211efc | 2650 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2651 | if (req_dst_orig_node) |
7d211efc | 2652 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2653 | kfree(tvlv_tt_data); |
a73105b8 | 2654 | return ret; |
a73105b8 | 2655 | } |
96412690 | 2656 | |
335fbe0f ML |
2657 | /** |
2658 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2659 | * translation table | |
2660 | * @bat_priv: the bat priv with all the soft interface information | |
2661 | * @tt_data: tt data containing the tt request information | |
2662 | * @req_src: mac address of tt request sender | |
2663 | * | |
2664 | * Returns true if tt request reply was sent, false otherwise. | |
2665 | */ | |
2666 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2667 | struct batadv_tvlv_tt_data *tt_data, | |
2668 | uint8_t *req_src) | |
a73105b8 | 2669 | { |
335fbe0f | 2670 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2671 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2672 | struct batadv_tvlv_tt_change *tt_change; |
2673 | struct batadv_orig_node *orig_node; | |
335fbe0f | 2674 | uint8_t my_ttvn, req_ttvn; |
7ea7b4a1 | 2675 | uint16_t tvlv_len; |
a73105b8 | 2676 | bool full_table; |
7ea7b4a1 | 2677 | int32_t tt_len; |
a73105b8 | 2678 | |
39c75a51 | 2679 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2680 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 2681 | req_src, tt_data->ttvn, |
a2f2b6cd | 2682 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2683 | |
a70a9aa9 | 2684 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2685 | |
807736f6 | 2686 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2687 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2688 | |
335fbe0f | 2689 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2690 | if (!orig_node) |
2691 | goto out; | |
2692 | ||
e5d89254 | 2693 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2694 | if (!primary_if) |
2695 | goto out; | |
2696 | ||
2697 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2698 | * is too big send the whole local translation table |
2699 | */ | |
335fbe0f | 2700 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2701 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2702 | full_table = true; |
2703 | else | |
2704 | full_table = false; | |
2705 | ||
335fbe0f ML |
2706 | /* TT fragmentation hasn't been implemented yet, so send as many |
2707 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2708 | */ |
a73105b8 | 2709 | if (!full_table) { |
807736f6 | 2710 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2711 | |
7ea7b4a1 AQ |
2712 | tt_len = bat_priv->tt.last_changeset_len; |
2713 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2714 | &tvlv_tt_data, | |
2715 | &tt_change, | |
2716 | &tt_len); | |
2717 | if (!tt_len) | |
a73105b8 AQ |
2718 | goto unlock; |
2719 | ||
335fbe0f | 2720 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2721 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2722 | bat_priv->tt.last_changeset_len); |
2723 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2724 | } else { |
335fbe0f ML |
2725 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
2726 | ||
7ea7b4a1 AQ |
2727 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2728 | * in the initial part | |
2729 | */ | |
2730 | tt_len = -1; | |
2731 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2732 | &tvlv_tt_data, | |
2733 | &tt_change, | |
2734 | &tt_len); | |
2735 | if (!tt_len) | |
a73105b8 | 2736 | goto out; |
7ea7b4a1 AQ |
2737 | |
2738 | /* fill the rest of the tvlv with the real TT entries */ | |
2739 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2740 | tt_change, tt_len, | |
2741 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2742 | } |
2743 | ||
335fbe0f ML |
2744 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2745 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2746 | |
2747 | if (full_table) | |
335fbe0f | 2748 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2749 | |
39c75a51 | 2750 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2751 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2752 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2753 | |
d69909d2 | 2754 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2755 | |
335fbe0f | 2756 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2757 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2758 | tvlv_len); | |
335fbe0f | 2759 | |
a73105b8 AQ |
2760 | goto out; |
2761 | ||
2762 | unlock: | |
807736f6 | 2763 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2764 | out: |
a70a9aa9 | 2765 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2766 | if (orig_node) |
7d211efc | 2767 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2768 | if (primary_if) |
e5d89254 | 2769 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2770 | kfree(tvlv_tt_data); |
2771 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2772 | return true; |
2773 | } | |
2774 | ||
335fbe0f ML |
2775 | /** |
2776 | * batadv_send_tt_response - send reply to tt request | |
2777 | * @bat_priv: the bat priv with all the soft interface information | |
2778 | * @tt_data: tt data containing the tt request information | |
2779 | * @req_src: mac address of tt request sender | |
2780 | * @req_dst: mac address of tt request recipient | |
2781 | * | |
2782 | * Returns true if tt request reply was sent, false otherwise. | |
2783 | */ | |
2784 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2785 | struct batadv_tvlv_tt_data *tt_data, | |
2786 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2787 | { |
cfd4f757 | 2788 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2789 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
2790 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
2791 | req_dst); | |
a73105b8 AQ |
2792 | } |
2793 | ||
56303d34 SE |
2794 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2795 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2796 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2797 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2798 | { |
2799 | int i; | |
a513088d | 2800 | int roams; |
a73105b8 AQ |
2801 | |
2802 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2803 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2804 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2805 | batadv_tt_global_del(bat_priv, orig_node, |
2806 | (tt_change + i)->addr, | |
c018ad3d | 2807 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2808 | "tt removed by changes", |
2809 | roams); | |
08c36d3e | 2810 | } else { |
08c36d3e | 2811 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2812 | (tt_change + i)->addr, |
c018ad3d | 2813 | ntohs((tt_change + i)->vid), |
d4f44692 | 2814 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2815 | /* In case of problem while storing a |
2816 | * global_entry, we stop the updating | |
2817 | * procedure without committing the | |
2818 | * ttvn change. This will avoid to send | |
2819 | * corrupted data on tt_request | |
2820 | */ | |
2821 | return; | |
08c36d3e | 2822 | } |
a73105b8 | 2823 | } |
e17931d1 | 2824 | orig_node->capa_initialized |= BATADV_ORIG_CAPA_HAS_TT; |
a73105b8 AQ |
2825 | } |
2826 | ||
56303d34 | 2827 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 AQ |
2828 | struct batadv_tvlv_tt_change *tt_change, |
2829 | uint8_t ttvn, uint8_t *resp_src, | |
2830 | uint16_t num_entries) | |
a73105b8 | 2831 | { |
170173bf | 2832 | struct batadv_orig_node *orig_node; |
a73105b8 | 2833 | |
335fbe0f | 2834 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2835 | if (!orig_node) |
2836 | goto out; | |
2837 | ||
2838 | /* Purge the old table first.. */ | |
95fb130d AQ |
2839 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2840 | "Received full table"); | |
a73105b8 | 2841 | |
7ea7b4a1 AQ |
2842 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2843 | ttvn); | |
a73105b8 AQ |
2844 | |
2845 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2846 | kfree(orig_node->tt_buff); | |
2847 | orig_node->tt_buff_len = 0; | |
2848 | orig_node->tt_buff = NULL; | |
2849 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2850 | ||
7ea7b4a1 | 2851 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2852 | |
2853 | out: | |
2854 | if (orig_node) | |
7d211efc | 2855 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2856 | } |
2857 | ||
56303d34 SE |
2858 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2859 | struct batadv_orig_node *orig_node, | |
a513088d | 2860 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2861 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2862 | { |
a513088d SE |
2863 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2864 | tt_num_changes, ttvn); | |
a73105b8 | 2865 | |
e8cf234a AQ |
2866 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2867 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2868 | atomic_set(&orig_node->last_ttvn, ttvn); |
2869 | } | |
2870 | ||
c018ad3d AQ |
2871 | /** |
2872 | * batadv_is_my_client - check if a client is served by the local node | |
2873 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 2874 | * @addr: the mac address of the client to check |
c018ad3d AQ |
2875 | * @vid: VLAN identifier |
2876 | * | |
2877 | * Returns true if the client is served by this node, false otherwise. | |
2878 | */ | |
2879 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2880 | unsigned short vid) | |
a73105b8 | 2881 | { |
170173bf | 2882 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2883 | bool ret = false; |
a73105b8 | 2884 | |
c018ad3d | 2885 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2886 | if (!tt_local_entry) |
2887 | goto out; | |
058d0e26 | 2888 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2889 | * consistency purpose) |
2890 | */ | |
7c1fd91d AQ |
2891 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2892 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2893 | goto out; |
7683fdc1 AQ |
2894 | ret = true; |
2895 | out: | |
a73105b8 | 2896 | if (tt_local_entry) |
a513088d | 2897 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2898 | return ret; |
a73105b8 AQ |
2899 | } |
2900 | ||
335fbe0f ML |
2901 | /** |
2902 | * batadv_handle_tt_response - process incoming tt reply | |
2903 | * @bat_priv: the bat priv with all the soft interface information | |
2904 | * @tt_data: tt data containing the tt request information | |
2905 | * @resp_src: mac address of tt reply sender | |
2906 | * @num_entries: number of tt change entries appended to the tt data | |
2907 | */ | |
2908 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2909 | struct batadv_tvlv_tt_data *tt_data, | |
2910 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2911 | { |
56303d34 SE |
2912 | struct batadv_tt_req_node *node, *safe; |
2913 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2914 | struct batadv_tvlv_tt_change *tt_change; |
7ea7b4a1 AQ |
2915 | uint8_t *tvlv_ptr = (uint8_t *)tt_data; |
2916 | uint16_t change_offset; | |
a73105b8 | 2917 | |
39c75a51 | 2918 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2919 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 2920 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 2921 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2922 | |
335fbe0f | 2923 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2924 | if (!orig_node) |
2925 | goto out; | |
2926 | ||
a70a9aa9 AQ |
2927 | spin_lock_bh(&orig_node->tt_lock); |
2928 | ||
7ea7b4a1 AQ |
2929 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2930 | change_offset *= ntohs(tt_data->num_vlan); | |
2931 | change_offset += sizeof(*tt_data); | |
2932 | tvlv_ptr += change_offset; | |
2933 | ||
2934 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2935 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2936 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2937 | resp_src, num_entries); | |
96412690 | 2938 | } else { |
335fbe0f ML |
2939 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2940 | tt_data->ttvn, tt_change); | |
96412690 | 2941 | } |
a73105b8 | 2942 | |
a70a9aa9 | 2943 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2944 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2945 | |
2946 | spin_unlock_bh(&orig_node->tt_lock); | |
2947 | ||
a73105b8 | 2948 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2949 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2950 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2951 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2952 | continue; |
2953 | list_del(&node->list); | |
2954 | kfree(node); | |
2955 | } | |
7ea7b4a1 | 2956 | |
807736f6 | 2957 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2958 | out: |
2959 | if (orig_node) | |
7d211efc | 2960 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2961 | } |
2962 | ||
56303d34 | 2963 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2964 | { |
56303d34 | 2965 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2966 | |
807736f6 | 2967 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2968 | |
807736f6 | 2969 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2970 | list_del(&node->list); |
2971 | kfree(node); | |
2972 | } | |
2973 | ||
807736f6 | 2974 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2975 | } |
2976 | ||
56303d34 | 2977 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2978 | { |
56303d34 | 2979 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2980 | |
807736f6 SE |
2981 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2982 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2983 | if (!batadv_has_timed_out(node->first_time, |
2984 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2985 | continue; |
2986 | ||
2987 | list_del(&node->list); | |
2988 | kfree(node); | |
2989 | } | |
807736f6 | 2990 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2991 | } |
2992 | ||
2993 | /* This function checks whether the client already reached the | |
2994 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2995 | * will not be sent. | |
2996 | * | |
9cfc7bd6 SE |
2997 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2998 | */ | |
56303d34 | 2999 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 3000 | uint8_t *client) |
cc47f66e | 3001 | { |
56303d34 | 3002 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3003 | bool ret = false; |
3004 | ||
807736f6 | 3005 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3006 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3007 | * reply from the same orig_node yet |
3008 | */ | |
807736f6 | 3009 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3010 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3011 | continue; |
3012 | ||
1eda58bf | 3013 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3014 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3015 | continue; |
3016 | ||
3e34819e | 3017 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3018 | /* Sorry, you roamed too many times! */ |
3019 | goto unlock; | |
3020 | ret = true; | |
3021 | break; | |
3022 | } | |
3023 | ||
3024 | if (!ret) { | |
3025 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
3026 | if (!tt_roam_node) | |
3027 | goto unlock; | |
3028 | ||
3029 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3030 | atomic_set(&tt_roam_node->counter, |
3031 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3032 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3033 | |
807736f6 | 3034 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3035 | ret = true; |
3036 | } | |
3037 | ||
3038 | unlock: | |
807736f6 | 3039 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3040 | return ret; |
3041 | } | |
3042 | ||
c018ad3d AQ |
3043 | /** |
3044 | * batadv_send_roam_adv - send a roaming advertisement message | |
3045 | * @bat_priv: the bat priv with all the soft interface information | |
3046 | * @client: mac address of the roaming client | |
3047 | * @vid: VLAN identifier | |
3048 | * @orig_node: message destination | |
3049 | * | |
3050 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3051 | * client. This is done to inform the node that from now on all traffic destined | |
3052 | * for this particular roamed client has to be forwarded to the sender of the | |
3053 | * roaming message. | |
3054 | */ | |
56303d34 | 3055 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 3056 | unsigned short vid, |
56303d34 | 3057 | struct batadv_orig_node *orig_node) |
cc47f66e | 3058 | { |
56303d34 | 3059 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3060 | struct batadv_tvlv_roam_adv tvlv_roam; |
3061 | ||
3062 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3063 | if (!primary_if) | |
3064 | goto out; | |
cc47f66e AQ |
3065 | |
3066 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3067 | * already roamed to us too many times |
3068 | */ | |
a513088d | 3069 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3070 | goto out; |
3071 | ||
39c75a51 | 3072 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3073 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3074 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3075 | |
d69909d2 | 3076 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3077 | |
122edaa0 | 3078 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3079 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3080 | |
3081 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3082 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3083 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3084 | |
3085 | out: | |
122edaa0 ML |
3086 | if (primary_if) |
3087 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
3088 | } |
3089 | ||
a513088d | 3090 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3091 | { |
56303d34 | 3092 | struct delayed_work *delayed_work; |
807736f6 | 3093 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3094 | struct batadv_priv *bat_priv; |
3095 | ||
3096 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3097 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3098 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3099 | |
a19d3d85 | 3100 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3101 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3102 | batadv_tt_req_purge(bat_priv); |
3103 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3104 | |
72414442 AQ |
3105 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3106 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3107 | } |
cc47f66e | 3108 | |
56303d34 | 3109 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3110 | { |
e1bf0c14 ML |
3111 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3112 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3113 | ||
807736f6 | 3114 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3115 | |
a513088d SE |
3116 | batadv_tt_local_table_free(bat_priv); |
3117 | batadv_tt_global_table_free(bat_priv); | |
3118 | batadv_tt_req_list_free(bat_priv); | |
3119 | batadv_tt_changes_list_free(bat_priv); | |
3120 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3121 | |
807736f6 | 3122 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3123 | } |
058d0e26 | 3124 | |
7ea7b4a1 AQ |
3125 | /** |
3126 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3127 | * table and possibly count them in the TT size | |
3128 | * @bat_priv: the bat priv with all the soft interface information | |
3129 | * @flags: the flag to switch | |
3130 | * @enable: whether to set or unset the flag | |
3131 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3132 | */ |
7ea7b4a1 AQ |
3133 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, |
3134 | uint16_t flags, bool enable, bool count) | |
058d0e26 | 3135 | { |
7ea7b4a1 AQ |
3136 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3137 | struct batadv_tt_common_entry *tt_common_entry; | |
697f2531 | 3138 | uint16_t changed_num = 0; |
058d0e26 | 3139 | struct hlist_head *head; |
7ea7b4a1 | 3140 | uint32_t i; |
058d0e26 AQ |
3141 | |
3142 | if (!hash) | |
7ea7b4a1 | 3143 | return; |
058d0e26 AQ |
3144 | |
3145 | for (i = 0; i < hash->size; i++) { | |
3146 | head = &hash->table[i]; | |
3147 | ||
3148 | rcu_read_lock(); | |
b67bfe0d | 3149 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3150 | head, hash_entry) { |
697f2531 AQ |
3151 | if (enable) { |
3152 | if ((tt_common_entry->flags & flags) == flags) | |
3153 | continue; | |
3154 | tt_common_entry->flags |= flags; | |
3155 | } else { | |
3156 | if (!(tt_common_entry->flags & flags)) | |
3157 | continue; | |
3158 | tt_common_entry->flags &= ~flags; | |
3159 | } | |
3160 | changed_num++; | |
7ea7b4a1 AQ |
3161 | |
3162 | if (!count) | |
3163 | continue; | |
3164 | ||
3165 | batadv_tt_local_size_inc(bat_priv, | |
3166 | tt_common_entry->vid); | |
058d0e26 AQ |
3167 | } |
3168 | rcu_read_unlock(); | |
3169 | } | |
058d0e26 AQ |
3170 | } |
3171 | ||
acd34afa | 3172 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3173 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3174 | { |
807736f6 | 3175 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3176 | struct batadv_tt_common_entry *tt_common; |
3177 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 3178 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 3179 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3180 | struct hlist_head *head; |
3181 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 3182 | uint32_t i; |
058d0e26 AQ |
3183 | |
3184 | if (!hash) | |
3185 | return; | |
3186 | ||
3187 | for (i = 0; i < hash->size; i++) { | |
3188 | head = &hash->table[i]; | |
3189 | list_lock = &hash->list_locks[i]; | |
3190 | ||
3191 | spin_lock_bh(list_lock); | |
b67bfe0d | 3192 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3193 | hash_entry) { |
3194 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3195 | continue; |
3196 | ||
39c75a51 | 3197 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3198 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3199 | tt_common->addr, | |
3200 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3201 | |
7ea7b4a1 | 3202 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3203 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3204 | tt_local = container_of(tt_common, |
3205 | struct batadv_tt_local_entry, | |
3206 | common); | |
35df3b29 AQ |
3207 | |
3208 | /* decrease the reference held for this vlan */ | |
3209 | vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid); | |
3210 | batadv_softif_vlan_free_ref(vlan); | |
3211 | batadv_softif_vlan_free_ref(vlan); | |
3212 | ||
56303d34 | 3213 | batadv_tt_local_entry_free_ref(tt_local); |
058d0e26 AQ |
3214 | } |
3215 | spin_unlock_bh(list_lock); | |
3216 | } | |
058d0e26 AQ |
3217 | } |
3218 | ||
e1bf0c14 | 3219 | /** |
a19d3d85 ML |
3220 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3221 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3222 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3223 | * |
3224 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3225 | */ |
a19d3d85 | 3226 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3227 | { |
c5caf4ef LL |
3228 | /* Update multicast addresses in local translation table */ |
3229 | batadv_mcast_mla_update(bat_priv); | |
3230 | ||
e1bf0c14 ML |
3231 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3232 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3233 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3234 | return; |
e1bf0c14 | 3235 | } |
be9aa4c1 | 3236 | |
7ea7b4a1 | 3237 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3238 | |
a513088d | 3239 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3240 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3241 | |
3242 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3243 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3244 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3245 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 3246 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3247 | |
3248 | /* reset the sending counter */ | |
807736f6 | 3249 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3250 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3251 | } |
a70a9aa9 | 3252 | |
a19d3d85 ML |
3253 | /** |
3254 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3255 | * have been queued in the time since the last commit | |
3256 | * @bat_priv: the bat priv with all the soft interface information | |
3257 | */ | |
3258 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3259 | { | |
3260 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3261 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3262 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3263 | } |
59b699cd | 3264 | |
56303d34 | 3265 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 3266 | uint8_t *dst, unsigned short vid) |
59b699cd | 3267 | { |
56303d34 SE |
3268 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3269 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3270 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3271 | bool ret = false; |
59b699cd | 3272 | |
b8cbd81d AQ |
3273 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3274 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3275 | goto out; |
59b699cd | 3276 | |
b8cbd81d | 3277 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3278 | if (!tt_local_entry) |
3279 | goto out; | |
3280 | ||
b8cbd81d | 3281 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3282 | if (!tt_global_entry) |
3283 | goto out; | |
3284 | ||
1f129fef | 3285 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3286 | goto out; |
3287 | ||
5870adc6 | 3288 | ret = true; |
59b699cd AQ |
3289 | |
3290 | out: | |
b8cbd81d AQ |
3291 | if (vlan) |
3292 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3293 | if (tt_global_entry) |
a513088d | 3294 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3295 | if (tt_local_entry) |
a513088d | 3296 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3297 | return ret; |
3298 | } | |
a943cac1 | 3299 | |
e1bf0c14 ML |
3300 | /** |
3301 | * batadv_tt_update_orig - update global translation table with new tt | |
3302 | * information received via ogms | |
3303 | * @bat_priv: the bat priv with all the soft interface information | |
3304 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3305 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3306 | * @tt_num_vlan: number of tvlv VLAN entries | |
3307 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3308 | * @tt_num_changes: number of tt changes inside the tt buffer |
3309 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3310 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3311 | */ |
3312 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3313 | struct batadv_orig_node *orig_node, | |
7ea7b4a1 AQ |
3314 | const void *tt_buff, uint16_t tt_num_vlan, |
3315 | struct batadv_tvlv_tt_change *tt_change, | |
3316 | uint16_t tt_num_changes, uint8_t ttvn) | |
a943cac1 ML |
3317 | { |
3318 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
7ea7b4a1 | 3319 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3320 | bool full_table = true; |
e17931d1 | 3321 | bool has_tt_init; |
a943cac1 | 3322 | |
7ea7b4a1 | 3323 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
e17931d1 LL |
3324 | has_tt_init = orig_node->capa_initialized & BATADV_ORIG_CAPA_HAS_TT; |
3325 | ||
17071578 | 3326 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3327 | * increased by one -> we can apply the attached changes |
3328 | */ | |
e17931d1 | 3329 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3330 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3331 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3332 | * times. | |
9cfc7bd6 SE |
3333 | * In this case send a tt request |
3334 | */ | |
a943cac1 ML |
3335 | if (!tt_num_changes) { |
3336 | full_table = false; | |
3337 | goto request_table; | |
3338 | } | |
3339 | ||
a70a9aa9 AQ |
3340 | spin_lock_bh(&orig_node->tt_lock); |
3341 | ||
a513088d | 3342 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3343 | ttvn, tt_change); |
a943cac1 ML |
3344 | |
3345 | /* Even if we received the precomputed crc with the OGM, we | |
3346 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3347 | * in the global table |
3348 | */ | |
7ea7b4a1 | 3349 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3350 | |
a70a9aa9 AQ |
3351 | spin_unlock_bh(&orig_node->tt_lock); |
3352 | ||
a943cac1 ML |
3353 | /* The ttvn alone is not enough to guarantee consistency |
3354 | * because a single value could represent different states | |
3355 | * (due to the wrap around). Thus a node has to check whether | |
3356 | * the resulting table (after applying the changes) is still | |
3357 | * consistent or not. E.g. a node could disconnect while its | |
3358 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3359 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3360 | * inconsistency |
3361 | */ | |
7ea7b4a1 AQ |
3362 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3363 | tt_num_vlan)) | |
a943cac1 | 3364 | goto request_table; |
a943cac1 ML |
3365 | } else { |
3366 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3367 | * in sync anymore -> request fresh tt data |
3368 | */ | |
e17931d1 | 3369 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3370 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3371 | tt_num_vlan)) { | |
a943cac1 | 3372 | request_table: |
39c75a51 | 3373 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3374 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3375 | orig_node->orig, ttvn, orig_ttvn, | |
3376 | tt_num_changes); | |
a513088d | 3377 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3378 | tt_vlan, tt_num_vlan, |
3379 | full_table); | |
a943cac1 ML |
3380 | return; |
3381 | } | |
3382 | } | |
3383 | } | |
3275e7cc | 3384 | |
c018ad3d AQ |
3385 | /** |
3386 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3387 | * @bat_priv: the bat priv with all the soft interface information | |
3388 | * @addr: the mac address of the client to check | |
3389 | * @vid: VLAN identifier | |
3390 | * | |
3391 | * Returns true if we know that the client has moved from its old originator | |
3392 | * to another one. This entry is still kept for consistency purposes and will be | |
3393 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3394 | */ |
56303d34 | 3395 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 3396 | uint8_t *addr, unsigned short vid) |
3275e7cc | 3397 | { |
56303d34 | 3398 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3399 | bool ret = false; |
3400 | ||
c018ad3d | 3401 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3402 | if (!tt_global_entry) |
3403 | goto out; | |
3404 | ||
c1d07431 | 3405 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3406 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3407 | out: |
3408 | return ret; | |
3409 | } | |
30cfd02b | 3410 | |
7c1fd91d AQ |
3411 | /** |
3412 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3413 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3414 | * @addr: the mac address of the local client to query |
3415 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3416 | * |
3417 | * Returns true if the local client is known to be roaming (it is not served by | |
3418 | * this node anymore) or not. If yes, the client is still present in the table | |
3419 | * to keep the latter consistent with the node TTVN | |
3420 | */ | |
3421 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 3422 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
3423 | { |
3424 | struct batadv_tt_local_entry *tt_local_entry; | |
3425 | bool ret = false; | |
3426 | ||
c018ad3d | 3427 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3428 | if (!tt_local_entry) |
3429 | goto out; | |
3430 | ||
3431 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3432 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3433 | out: | |
3434 | return ret; | |
7c1fd91d AQ |
3435 | } |
3436 | ||
30cfd02b AQ |
3437 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3438 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3439 | const unsigned char *addr, |
16052789 | 3440 | unsigned short vid) |
30cfd02b AQ |
3441 | { |
3442 | bool ret = false; | |
3443 | ||
16052789 | 3444 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3445 | BATADV_TT_CLIENT_TEMP, |
3446 | atomic_read(&orig_node->last_ttvn))) | |
3447 | goto out; | |
3448 | ||
3449 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3450 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3451 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3452 | ret = true; |
3453 | out: | |
3454 | return ret; | |
3455 | } | |
e1bf0c14 | 3456 | |
a19d3d85 ML |
3457 | /** |
3458 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3459 | * maximum packet size that can be transported through the mesh | |
3460 | * @soft_iface: netdev struct of the mesh interface | |
3461 | * | |
3462 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3463 | * to be removed. | |
3464 | */ | |
3465 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3466 | { | |
3467 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3468 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3469 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3470 | bool reduced = false; | |
3471 | ||
3472 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3473 | ||
3474 | while (true) { | |
3475 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3476 | if (packet_size_max >= table_size) | |
3477 | break; | |
3478 | ||
3479 | batadv_tt_local_purge(bat_priv, timeout); | |
3480 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3481 | ||
3482 | timeout /= 2; | |
3483 | reduced = true; | |
3484 | net_ratelimited_function(batadv_info, soft_iface, | |
3485 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3486 | packet_size_max); | |
3487 | } | |
3488 | ||
3489 | /* commit these changes immediately, to avoid synchronization problem | |
3490 | * with the TTVN | |
3491 | */ | |
3492 | if (reduced) | |
3493 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3494 | ||
3495 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3496 | } | |
3497 | ||
e1bf0c14 ML |
3498 | /** |
3499 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3500 | * @bat_priv: the bat priv with all the soft interface information | |
3501 | * @orig: the orig_node of the ogm | |
3502 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3503 | * @tvlv_value: tvlv buffer containing the gateway data | |
3504 | * @tvlv_value_len: tvlv buffer length | |
3505 | */ | |
3506 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3507 | struct batadv_orig_node *orig, | |
7ea7b4a1 | 3508 | uint8_t flags, void *tvlv_value, |
e1bf0c14 ML |
3509 | uint16_t tvlv_value_len) |
3510 | { | |
7ea7b4a1 AQ |
3511 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3512 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3513 | struct batadv_tvlv_tt_data *tt_data; |
7ea7b4a1 | 3514 | uint16_t num_entries, num_vlan; |
e1bf0c14 ML |
3515 | |
3516 | if (tvlv_value_len < sizeof(*tt_data)) | |
3517 | return; | |
3518 | ||
3519 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3520 | tvlv_value_len -= sizeof(*tt_data); | |
3521 | ||
7ea7b4a1 AQ |
3522 | num_vlan = ntohs(tt_data->num_vlan); |
3523 | ||
3524 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3525 | return; | |
3526 | ||
3527 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3528 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3529 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3530 | ||
298e6e68 | 3531 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3532 | |
7ea7b4a1 AQ |
3533 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3534 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3535 | } |
3536 | ||
335fbe0f ML |
3537 | /** |
3538 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3539 | * container | |
3540 | * @bat_priv: the bat priv with all the soft interface information | |
3541 | * @src: mac address of tt tvlv sender | |
3542 | * @dst: mac address of tt tvlv recipient | |
3543 | * @tvlv_value: tvlv buffer containing the tt data | |
3544 | * @tvlv_value_len: tvlv buffer length | |
3545 | * | |
3546 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3547 | * otherwise. | |
3548 | */ | |
3549 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3550 | uint8_t *src, uint8_t *dst, | |
3551 | void *tvlv_value, | |
3552 | uint16_t tvlv_value_len) | |
3553 | { | |
3554 | struct batadv_tvlv_tt_data *tt_data; | |
7ea7b4a1 | 3555 | uint16_t tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3556 | char tt_flag; |
3557 | bool ret; | |
3558 | ||
3559 | if (tvlv_value_len < sizeof(*tt_data)) | |
3560 | return NET_RX_SUCCESS; | |
3561 | ||
3562 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3563 | tvlv_value_len -= sizeof(*tt_data); | |
3564 | ||
7ea7b4a1 AQ |
3565 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3566 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3567 | ||
3568 | if (tvlv_value_len < tt_vlan_len) | |
3569 | return NET_RX_SUCCESS; | |
3570 | ||
3571 | tvlv_value_len -= tt_vlan_len; | |
3572 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3573 | |
3574 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3575 | case BATADV_TT_REQUEST: | |
3576 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3577 | ||
3578 | /* If this node cannot provide a TT response the tt_request is | |
3579 | * forwarded | |
3580 | */ | |
3581 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3582 | if (!ret) { | |
3583 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3584 | tt_flag = 'F'; | |
3585 | else | |
3586 | tt_flag = '.'; | |
3587 | ||
3588 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3589 | "Routing TT_REQUEST to %pM [%c]\n", | |
3590 | dst, tt_flag); | |
3591 | /* tvlv API will re-route the packet */ | |
3592 | return NET_RX_DROP; | |
3593 | } | |
3594 | break; | |
3595 | case BATADV_TT_RESPONSE: | |
3596 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3597 | ||
3598 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3599 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3600 | src, tt_num_entries); |
335fbe0f ML |
3601 | return NET_RX_SUCCESS; |
3602 | } | |
3603 | ||
3604 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3605 | tt_flag = 'F'; | |
3606 | else | |
3607 | tt_flag = '.'; | |
3608 | ||
3609 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3610 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3611 | ||
3612 | /* tvlv API will re-route the packet */ | |
3613 | return NET_RX_DROP; | |
3614 | } | |
3615 | ||
3616 | return NET_RX_SUCCESS; | |
3617 | } | |
3618 | ||
122edaa0 ML |
3619 | /** |
3620 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3621 | * @bat_priv: the bat priv with all the soft interface information | |
3622 | * @src: mac address of tt tvlv sender | |
3623 | * @dst: mac address of tt tvlv recipient | |
3624 | * @tvlv_value: tvlv buffer containing the tt data | |
3625 | * @tvlv_value_len: tvlv buffer length | |
3626 | * | |
3627 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3628 | * otherwise. | |
3629 | */ | |
3630 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3631 | uint8_t *src, uint8_t *dst, | |
3632 | void *tvlv_value, | |
3633 | uint16_t tvlv_value_len) | |
3634 | { | |
3635 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3636 | struct batadv_orig_node *orig_node = NULL; | |
3637 | ||
3638 | /* If this node is not the intended recipient of the | |
3639 | * roaming advertisement the packet is forwarded | |
3640 | * (the tvlv API will re-route the packet). | |
3641 | */ | |
3642 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3643 | return NET_RX_DROP; | |
3644 | ||
122edaa0 ML |
3645 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3646 | goto out; | |
3647 | ||
3648 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3649 | if (!orig_node) | |
3650 | goto out; | |
3651 | ||
3652 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3653 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3654 | ||
3655 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3656 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3657 | src, roaming_adv->client); | |
3658 | ||
3659 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3660 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3661 | atomic_read(&orig_node->last_ttvn) + 1); |
3662 | ||
3663 | out: | |
3664 | if (orig_node) | |
3665 | batadv_orig_node_free_ref(orig_node); | |
3666 | return NET_RX_SUCCESS; | |
3667 | } | |
3668 | ||
e1bf0c14 ML |
3669 | /** |
3670 | * batadv_tt_init - initialise the translation table internals | |
3671 | * @bat_priv: the bat priv with all the soft interface information | |
3672 | * | |
3673 | * Return 0 on success or negative error number in case of failure. | |
3674 | */ | |
3675 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3676 | { | |
3677 | int ret; | |
3678 | ||
0eb01568 AQ |
3679 | /* synchronized flags must be remote */ |
3680 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3681 | ||
e1bf0c14 ML |
3682 | ret = batadv_tt_local_init(bat_priv); |
3683 | if (ret < 0) | |
3684 | return ret; | |
3685 | ||
3686 | ret = batadv_tt_global_init(bat_priv); | |
3687 | if (ret < 0) | |
3688 | return ret; | |
3689 | ||
3690 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3691 | batadv_tt_tvlv_unicast_handler_v1, |
3692 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3693 | |
122edaa0 ML |
3694 | batadv_tvlv_handler_register(bat_priv, NULL, |
3695 | batadv_roam_tvlv_unicast_handler_v1, | |
3696 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3697 | ||
e1bf0c14 ML |
3698 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3699 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3700 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3701 | ||
3702 | return 1; | |
3703 | } | |
42cb0bef AQ |
3704 | |
3705 | /** | |
3706 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3707 | * @bat_priv: the bat priv with all the soft interface information | |
3708 | * @addr: the mac address of the client | |
3709 | * @vid: the identifier of the VLAN where this client is connected | |
3710 | * | |
3711 | * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false | |
3712 | * otherwise | |
3713 | */ | |
3714 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
3715 | const uint8_t *addr, unsigned short vid) | |
3716 | { | |
3717 | struct batadv_tt_global_entry *tt; | |
3718 | bool ret; | |
3719 | ||
3720 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3721 | if (!tt) | |
3722 | return false; | |
3723 | ||
3724 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3725 | ||
3726 | batadv_tt_global_entry_free_ref(tt); | |
3727 | ||
3728 | return ret; | |
3729 | } |