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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); | |
354136bc ML |
597 | if (WARN(!vlan, "adding TT local entry %pM to non-existent VLAN %d", |
598 | addr, BATADV_PRINT_VID(vid))) | |
599 | goto out; | |
35df3b29 | 600 | |
39c75a51 | 601 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
602 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
603 | addr, BATADV_PRINT_VID(vid), | |
807736f6 | 604 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 605 | |
8fdd0153 | 606 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
607 | /* The local entry has to be marked as NEW to avoid to send it in |
608 | * a full table response going out before the next ttvn increment | |
609 | * (consistency check) | |
610 | */ | |
611 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 612 | tt_local->common.vid = vid; |
0c69aecc | 613 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
614 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
615 | atomic_set(&tt_local->common.refcount, 2); | |
616 | tt_local->last_seen = jiffies; | |
617 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 618 | |
c5caf4ef LL |
619 | /* the batman interface mac and multicast addresses should never be |
620 | * purged | |
621 | */ | |
622 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
623 | is_multicast_ether_addr(addr)) | |
47c94655 | 624 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 625 | |
807736f6 | 626 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 627 | batadv_choose_tt, &tt_local->common, |
47c94655 | 628 | &tt_local->common.hash_entry); |
80b3f58c SW |
629 | |
630 | if (unlikely(hash_added != 0)) { | |
631 | /* remove the reference for the hash */ | |
47c94655 | 632 | batadv_tt_local_entry_free_ref(tt_local); |
35df3b29 | 633 | batadv_softif_vlan_free_ref(vlan); |
80b3f58c SW |
634 | goto out; |
635 | } | |
636 | ||
068ee6e2 | 637 | add_event: |
3abe4adb | 638 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 639 | |
068ee6e2 AQ |
640 | check_roaming: |
641 | /* Check whether it is a roaming, but don't do anything if the roaming | |
642 | * process has already been handled | |
643 | */ | |
644 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 645 | /* These node are probably going to update their tt table */ |
47c94655 | 646 | head = &tt_global->orig_list; |
db08e6e5 | 647 | rcu_read_lock(); |
b67bfe0d | 648 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 649 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 650 | tt_global->common.vid, |
a513088d | 651 | orig_entry->orig_node); |
db08e6e5 SW |
652 | } |
653 | rcu_read_unlock(); | |
068ee6e2 AQ |
654 | if (roamed_back) { |
655 | batadv_tt_global_free(bat_priv, tt_global, | |
656 | "Roaming canceled"); | |
657 | tt_global = NULL; | |
658 | } else { | |
659 | /* The global entry has to be marked as ROAMING and | |
660 | * has to be kept for consistency purpose | |
661 | */ | |
662 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
663 | tt_global->roam_at = jiffies; | |
664 | } | |
7683fdc1 | 665 | } |
068ee6e2 | 666 | |
3c4f7ab6 AQ |
667 | /* store the current remote flags before altering them. This helps |
668 | * understanding is flags are changing or not | |
669 | */ | |
670 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
671 | ||
672 | if (batadv_is_wifi_netdev(in_dev)) | |
673 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
674 | else | |
675 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 676 | |
9464d071 AQ |
677 | /* check the mark in the skb: if it's equal to the configured |
678 | * isolation_mark, it means the packet is coming from an isolated | |
679 | * non-mesh client | |
680 | */ | |
681 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
682 | if (bat_priv->isolation_mark_mask && | |
683 | match_mark == bat_priv->isolation_mark) | |
684 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
685 | else | |
686 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
687 | ||
3c4f7ab6 AQ |
688 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
689 | * entry so that all the nodes can get the new flags | |
690 | */ | |
691 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
692 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
693 | ||
694 | ret = true; | |
7683fdc1 | 695 | out: |
0c69aecc AQ |
696 | if (in_dev) |
697 | dev_put(in_dev); | |
47c94655 AQ |
698 | if (tt_local) |
699 | batadv_tt_local_entry_free_ref(tt_local); | |
700 | if (tt_global) | |
701 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 702 | return ret; |
c6c8fea2 SE |
703 | } |
704 | ||
7ea7b4a1 AQ |
705 | /** |
706 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
707 | * within a TT Response directed to another node | |
708 | * @orig_node: originator for which the TT data has to be prepared | |
709 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
710 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
711 | * changed can be stored | |
712 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
713 | * function reserves the amount of space needed to send the entire global TT | |
714 | * table. In case of success the value is updated with the real amount of | |
715 | * reserved bytes | |
716 | ||
717 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
718 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
719 | * objects, one per active VLAN served by the originator node. | |
720 | * | |
721 | * Return the size of the allocated buffer or 0 in case of failure. | |
722 | */ | |
723 | static uint16_t | |
724 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, | |
725 | struct batadv_tvlv_tt_data **tt_data, | |
726 | struct batadv_tvlv_tt_change **tt_change, | |
727 | int32_t *tt_len) | |
728 | { | |
729 | uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len; | |
730 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
731 | struct batadv_orig_node_vlan *vlan; | |
732 | uint8_t *tt_change_ptr; | |
733 | ||
734 | rcu_read_lock(); | |
735 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
736 | num_vlan++; | |
737 | num_entries += atomic_read(&vlan->tt.num_entries); | |
738 | } | |
739 | ||
740 | change_offset = sizeof(**tt_data); | |
741 | change_offset += num_vlan * sizeof(*tt_vlan); | |
742 | ||
743 | /* if tt_len is negative, allocate the space needed by the full table */ | |
744 | if (*tt_len < 0) | |
745 | *tt_len = batadv_tt_len(num_entries); | |
746 | ||
747 | tvlv_len = *tt_len; | |
748 | tvlv_len += change_offset; | |
749 | ||
750 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
751 | if (!*tt_data) { | |
752 | *tt_len = 0; | |
753 | goto out; | |
754 | } | |
755 | ||
756 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
757 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
758 | (*tt_data)->num_vlan = htons(num_vlan); | |
759 | ||
760 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
761 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
762 | tt_vlan->vid = htons(vlan->vid); | |
763 | tt_vlan->crc = htonl(vlan->tt.crc); | |
764 | ||
765 | tt_vlan++; | |
766 | } | |
767 | ||
768 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
769 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
770 | ||
771 | out: | |
772 | rcu_read_unlock(); | |
773 | return tvlv_len; | |
774 | } | |
775 | ||
776 | /** | |
777 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
778 | * node | |
779 | * @bat_priv: the bat priv with all the soft interface information | |
780 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
781 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
782 | * changes can be stored | |
783 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
784 | * function reserves the amount of space needed to send the entire local TT | |
785 | * table. In case of success the value is updated with the real amount of | |
786 | * reserved bytes | |
787 | * | |
788 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
789 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
790 | * objects, one per active VLAN. | |
791 | * | |
792 | * Return the size of the allocated buffer or 0 in case of failure. | |
793 | */ | |
794 | static uint16_t | |
795 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, | |
796 | struct batadv_tvlv_tt_data **tt_data, | |
797 | struct batadv_tvlv_tt_change **tt_change, | |
798 | int32_t *tt_len) | |
799 | { | |
800 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
801 | struct batadv_softif_vlan *vlan; | |
802 | uint16_t num_vlan = 0, num_entries = 0, tvlv_len; | |
803 | uint8_t *tt_change_ptr; | |
804 | int change_offset; | |
805 | ||
806 | rcu_read_lock(); | |
807 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
808 | num_vlan++; | |
809 | num_entries += atomic_read(&vlan->tt.num_entries); | |
810 | } | |
811 | ||
812 | change_offset = sizeof(**tt_data); | |
813 | change_offset += num_vlan * sizeof(*tt_vlan); | |
814 | ||
815 | /* if tt_len is negative, allocate the space needed by the full table */ | |
816 | if (*tt_len < 0) | |
817 | *tt_len = batadv_tt_len(num_entries); | |
818 | ||
819 | tvlv_len = *tt_len; | |
820 | tvlv_len += change_offset; | |
821 | ||
822 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
823 | if (!*tt_data) { | |
824 | tvlv_len = 0; | |
825 | goto out; | |
826 | } | |
827 | ||
828 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
829 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
830 | (*tt_data)->num_vlan = htons(num_vlan); | |
831 | ||
832 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
833 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
834 | tt_vlan->vid = htons(vlan->vid); | |
835 | tt_vlan->crc = htonl(vlan->tt.crc); | |
836 | ||
837 | tt_vlan++; | |
838 | } | |
839 | ||
840 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
841 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
842 | ||
843 | out: | |
844 | rcu_read_unlock(); | |
845 | return tvlv_len; | |
846 | } | |
847 | ||
e1bf0c14 ML |
848 | /** |
849 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
850 | * after local tt changes have been committed | |
851 | * @bat_priv: the bat priv with all the soft interface information | |
852 | */ | |
853 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 854 | { |
e1bf0c14 ML |
855 | struct batadv_tt_change_node *entry, *safe; |
856 | struct batadv_tvlv_tt_data *tt_data; | |
857 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 858 | int tt_diff_len, tt_change_len = 0; |
e1bf0c14 | 859 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; |
7ea7b4a1 | 860 | uint16_t tvlv_len; |
be9aa4c1 | 861 | |
7ea7b4a1 AQ |
862 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
863 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
864 | |
865 | /* if we have too many changes for one packet don't send any | |
866 | * and wait for the tt table request which will be fragmented | |
867 | */ | |
e1bf0c14 ML |
868 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
869 | tt_diff_len = 0; | |
be9aa4c1 | 870 | |
7ea7b4a1 AQ |
871 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
872 | &tt_change, &tt_diff_len); | |
873 | if (!tvlv_len) | |
e1bf0c14 | 874 | return; |
be9aa4c1 | 875 | |
e1bf0c14 | 876 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 877 | |
e1bf0c14 ML |
878 | if (tt_diff_len == 0) |
879 | goto container_register; | |
be9aa4c1 | 880 | |
807736f6 SE |
881 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
882 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 883 | |
807736f6 | 884 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 885 | list) { |
e1bf0c14 ML |
886 | if (tt_diff_entries_count < tt_diff_entries_num) { |
887 | memcpy(tt_change + tt_diff_entries_count, | |
888 | &entry->change, | |
889 | sizeof(struct batadv_tvlv_tt_change)); | |
890 | tt_diff_entries_count++; | |
c6c8fea2 | 891 | } |
a73105b8 AQ |
892 | list_del(&entry->list); |
893 | kfree(entry); | |
c6c8fea2 | 894 | } |
807736f6 | 895 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
896 | |
897 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
898 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
899 | kfree(bat_priv->tt.last_changeset); | |
900 | bat_priv->tt.last_changeset_len = 0; | |
901 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 902 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 903 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 904 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 905 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
906 | * instead of providing the diff |
907 | */ | |
e1bf0c14 | 908 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 909 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
910 | memcpy(bat_priv->tt.last_changeset, |
911 | tt_change, tt_change_len); | |
912 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
913 | } |
914 | } | |
807736f6 | 915 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 916 | |
e1bf0c14 ML |
917 | container_register: |
918 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 919 | tvlv_len); |
e1bf0c14 | 920 | kfree(tt_data); |
c6c8fea2 SE |
921 | } |
922 | ||
08c36d3e | 923 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
924 | { |
925 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 926 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 927 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 928 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 929 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 930 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 931 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 932 | struct hlist_head *head; |
7ea7b4a1 | 933 | unsigned short vid; |
c90681b8 | 934 | uint32_t i; |
85766a82 AQ |
935 | int last_seen_secs; |
936 | int last_seen_msecs; | |
937 | unsigned long last_seen_jiffies; | |
938 | bool no_purge; | |
939 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 940 | |
30da63a6 ML |
941 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
942 | if (!primary_if) | |
32ae9b22 | 943 | goto out; |
c6c8fea2 | 944 | |
86ceb360 | 945 | seq_printf(seq, |
7ea7b4a1 AQ |
946 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
947 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); | |
dd24ddb2 | 948 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 949 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 950 | |
c6c8fea2 SE |
951 | for (i = 0; i < hash->size; i++) { |
952 | head = &hash->table[i]; | |
953 | ||
7aadf889 | 954 | rcu_read_lock(); |
b67bfe0d | 955 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 956 | head, hash_entry) { |
85766a82 AQ |
957 | tt_local = container_of(tt_common_entry, |
958 | struct batadv_tt_local_entry, | |
959 | common); | |
7ea7b4a1 | 960 | vid = tt_common_entry->vid; |
85766a82 AQ |
961 | last_seen_jiffies = jiffies - tt_local->last_seen; |
962 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
963 | last_seen_secs = last_seen_msecs / 1000; | |
964 | last_seen_msecs = last_seen_msecs % 1000; | |
965 | ||
966 | no_purge = tt_common_entry->flags & np_flag; | |
967 | ||
7ea7b4a1 AQ |
968 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
969 | if (!vlan) { | |
970 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
971 | BATADV_PRINT_VID(vid)); | |
972 | continue; | |
973 | } | |
974 | ||
975 | seq_printf(seq, | |
dd24ddb2 | 976 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 977 | tt_common_entry->addr, |
16052789 | 978 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
979 | ((tt_common_entry->flags & |
980 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 981 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
982 | ((tt_common_entry->flags & |
983 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
984 | ((tt_common_entry->flags & | |
985 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
986 | ((tt_common_entry->flags & | |
987 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
988 | ((tt_common_entry->flags & | |
989 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 990 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
991 | no_purge ? 0 : last_seen_msecs, |
992 | vlan->tt.crc); | |
993 | ||
994 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 995 | } |
7aadf889 | 996 | rcu_read_unlock(); |
c6c8fea2 | 997 | } |
32ae9b22 ML |
998 | out: |
999 | if (primary_if) | |
e5d89254 | 1000 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1001 | return 0; |
c6c8fea2 SE |
1002 | } |
1003 | ||
56303d34 SE |
1004 | static void |
1005 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1006 | struct batadv_tt_local_entry *tt_local_entry, | |
1007 | uint16_t flags, const char *message) | |
c6c8fea2 | 1008 | { |
3abe4adb | 1009 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1010 | |
015758d0 AQ |
1011 | /* The local client has to be marked as "pending to be removed" but has |
1012 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1013 | * response issued before the net ttvn increment (consistency check) |
1014 | */ | |
acd34afa | 1015 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1016 | |
39c75a51 | 1017 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1018 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1019 | tt_local_entry->common.addr, | |
1020 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1021 | } |
1022 | ||
7f91d06c AQ |
1023 | /** |
1024 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1025 | * @bat_priv: the bat priv with all the soft interface information | |
1026 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1027 | * @vid: VLAN identifier |
7f91d06c AQ |
1028 | * @message: message to append to the log on deletion |
1029 | * @roaming: true if the deletion is due to a roaming event | |
1030 | * | |
1031 | * Returns the flags assigned to the local entry before being deleted | |
1032 | */ | |
1033 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
c018ad3d AQ |
1034 | const uint8_t *addr, unsigned short vid, |
1035 | const char *message, bool roaming) | |
c6c8fea2 | 1036 | { |
170173bf | 1037 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 1038 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
35df3b29 | 1039 | struct batadv_softif_vlan *vlan; |
ef72706a | 1040 | void *tt_entry_exists; |
c6c8fea2 | 1041 | |
c018ad3d | 1042 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1043 | if (!tt_local_entry) |
1044 | goto out; | |
1045 | ||
7f91d06c AQ |
1046 | curr_flags = tt_local_entry->common.flags; |
1047 | ||
acd34afa | 1048 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1049 | /* if this global entry addition is due to a roaming, the node has to |
1050 | * mark the local entry as "roamed" in order to correctly reroute | |
1051 | * packets later | |
1052 | */ | |
7c1fd91d | 1053 | if (roaming) { |
acd34afa | 1054 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1055 | /* mark the local client as ROAMed */ |
1056 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1057 | } | |
42d0b044 | 1058 | |
068ee6e2 AQ |
1059 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1060 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1061 | message); | |
1062 | goto out; | |
1063 | } | |
1064 | /* if this client has been added right now, it is possible to | |
1065 | * immediately purge it | |
1066 | */ | |
3abe4adb | 1067 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1068 | |
1069 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1070 | batadv_compare_tt, | |
1071 | batadv_choose_tt, | |
1072 | &tt_local_entry->common); | |
1073 | if (!tt_entry_exists) | |
1074 | goto out; | |
1075 | ||
1076 | /* extra call to free the local tt entry */ | |
068ee6e2 | 1077 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c | 1078 | |
35df3b29 AQ |
1079 | /* decrease the reference held for this vlan */ |
1080 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc ML |
1081 | if (!vlan) |
1082 | goto out; | |
1083 | ||
35df3b29 AQ |
1084 | batadv_softif_vlan_free_ref(vlan); |
1085 | batadv_softif_vlan_free_ref(vlan); | |
1086 | ||
7683fdc1 AQ |
1087 | out: |
1088 | if (tt_local_entry) | |
a513088d | 1089 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1090 | |
1091 | return curr_flags; | |
c6c8fea2 SE |
1092 | } |
1093 | ||
a19d3d85 ML |
1094 | /** |
1095 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1096 | * @bat_priv: the bat priv with all the soft interface information | |
1097 | * @head: pointer to the list containing the local tt entries | |
1098 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1099 | * inactive or not | |
1100 | */ | |
56303d34 | 1101 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1102 | struct hlist_head *head, |
1103 | int timeout) | |
c6c8fea2 | 1104 | { |
56303d34 SE |
1105 | struct batadv_tt_local_entry *tt_local_entry; |
1106 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1107 | struct hlist_node *node_tmp; |
acd34afa | 1108 | |
b67bfe0d | 1109 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1110 | hash_entry) { |
1111 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1112 | struct batadv_tt_local_entry, |
1113 | common); | |
acd34afa SE |
1114 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1115 | continue; | |
1116 | ||
1117 | /* entry already marked for deletion */ | |
1118 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1119 | continue; | |
1120 | ||
a19d3d85 | 1121 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1122 | continue; |
1123 | ||
1124 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1125 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1126 | } | |
1127 | } | |
1128 | ||
a19d3d85 ML |
1129 | /** |
1130 | * batadv_tt_local_purge - purge inactive tt local entries | |
1131 | * @bat_priv: the bat priv with all the soft interface information | |
1132 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1133 | * inactive or not | |
1134 | */ | |
1135 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1136 | int timeout) | |
acd34afa | 1137 | { |
807736f6 | 1138 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1139 | struct hlist_head *head; |
7683fdc1 | 1140 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1141 | uint32_t i; |
c6c8fea2 | 1142 | |
c6c8fea2 SE |
1143 | for (i = 0; i < hash->size; i++) { |
1144 | head = &hash->table[i]; | |
7683fdc1 | 1145 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1146 | |
7683fdc1 | 1147 | spin_lock_bh(list_lock); |
a19d3d85 | 1148 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1149 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1150 | } |
c6c8fea2 SE |
1151 | } |
1152 | ||
56303d34 | 1153 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1154 | { |
5bf74e9c | 1155 | struct batadv_hashtable *hash; |
a73105b8 | 1156 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1157 | struct batadv_tt_common_entry *tt_common_entry; |
1158 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 1159 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 1160 | struct hlist_node *node_tmp; |
7683fdc1 | 1161 | struct hlist_head *head; |
c90681b8 | 1162 | uint32_t i; |
a73105b8 | 1163 | |
807736f6 | 1164 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1165 | return; |
1166 | ||
807736f6 | 1167 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1168 | |
1169 | for (i = 0; i < hash->size; i++) { | |
1170 | head = &hash->table[i]; | |
1171 | list_lock = &hash->list_locks[i]; | |
1172 | ||
1173 | spin_lock_bh(list_lock); | |
b67bfe0d | 1174 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1175 | head, hash_entry) { |
b67bfe0d | 1176 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1177 | tt_local = container_of(tt_common_entry, |
1178 | struct batadv_tt_local_entry, | |
1179 | common); | |
35df3b29 AQ |
1180 | |
1181 | /* decrease the reference held for this vlan */ | |
1182 | vlan = batadv_softif_vlan_get(bat_priv, | |
1183 | tt_common_entry->vid); | |
354136bc ML |
1184 | if (vlan) { |
1185 | batadv_softif_vlan_free_ref(vlan); | |
1186 | batadv_softif_vlan_free_ref(vlan); | |
1187 | } | |
35df3b29 | 1188 | |
56303d34 | 1189 | batadv_tt_local_entry_free_ref(tt_local); |
a73105b8 AQ |
1190 | } |
1191 | spin_unlock_bh(list_lock); | |
1192 | } | |
1193 | ||
1a8eaf07 | 1194 | batadv_hash_destroy(hash); |
a73105b8 | 1195 | |
807736f6 | 1196 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1197 | } |
1198 | ||
56303d34 | 1199 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1200 | { |
807736f6 | 1201 | if (bat_priv->tt.global_hash) |
5346c35e | 1202 | return 0; |
c6c8fea2 | 1203 | |
807736f6 | 1204 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1205 | |
807736f6 | 1206 | if (!bat_priv->tt.global_hash) |
5346c35e | 1207 | return -ENOMEM; |
c6c8fea2 | 1208 | |
dec05074 AQ |
1209 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1210 | &batadv_tt_global_hash_lock_class_key); | |
1211 | ||
5346c35e | 1212 | return 0; |
c6c8fea2 SE |
1213 | } |
1214 | ||
56303d34 | 1215 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1216 | { |
56303d34 | 1217 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1218 | |
807736f6 | 1219 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1220 | |
807736f6 | 1221 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1222 | list) { |
1223 | list_del(&entry->list); | |
1224 | kfree(entry); | |
1225 | } | |
c6c8fea2 | 1226 | |
807736f6 SE |
1227 | atomic_set(&bat_priv->tt.local_changes, 0); |
1228 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1229 | } |
c6c8fea2 | 1230 | |
d657e621 AQ |
1231 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1232 | * batadv_tt_global_entry list | |
1233 | * | |
1234 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1235 | */ |
d657e621 AQ |
1236 | static struct batadv_tt_orig_list_entry * |
1237 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1238 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1239 | { |
d657e621 | 1240 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1241 | const struct hlist_head *head; |
db08e6e5 SW |
1242 | |
1243 | rcu_read_lock(); | |
1244 | head = &entry->orig_list; | |
b67bfe0d | 1245 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1246 | if (tmp_orig_entry->orig_node != orig_node) |
1247 | continue; | |
1248 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1249 | continue; | |
1250 | ||
1251 | orig_entry = tmp_orig_entry; | |
1252 | break; | |
db08e6e5 SW |
1253 | } |
1254 | rcu_read_unlock(); | |
d657e621 AQ |
1255 | |
1256 | return orig_entry; | |
1257 | } | |
1258 | ||
1259 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1260 | * returns true if found, false otherwise | |
1261 | */ | |
1262 | static bool | |
1263 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1264 | const struct batadv_orig_node *orig_node) | |
1265 | { | |
1266 | struct batadv_tt_orig_list_entry *orig_entry; | |
1267 | bool found = false; | |
1268 | ||
1269 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1270 | if (orig_entry) { | |
1271 | found = true; | |
1272 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1273 | } | |
1274 | ||
db08e6e5 SW |
1275 | return found; |
1276 | } | |
1277 | ||
a513088d | 1278 | static void |
d657e621 | 1279 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1280 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1281 | { |
56303d34 | 1282 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1283 | |
d657e621 | 1284 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1285 | if (orig_entry) { |
1286 | /* refresh the ttvn: the current value could be a bogus one that | |
1287 | * was added during a "temporary client detection" | |
1288 | */ | |
1289 | orig_entry->ttvn = ttvn; | |
d657e621 | 1290 | goto out; |
30cfd02b | 1291 | } |
d657e621 | 1292 | |
db08e6e5 SW |
1293 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1294 | if (!orig_entry) | |
d657e621 | 1295 | goto out; |
db08e6e5 SW |
1296 | |
1297 | INIT_HLIST_NODE(&orig_entry->list); | |
1298 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1299 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1300 | orig_entry->orig_node = orig_node; |
1301 | orig_entry->ttvn = ttvn; | |
d657e621 | 1302 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1303 | |
d657e621 | 1304 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1305 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1306 | &tt_global->orig_list); |
1307 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1308 | atomic_inc(&tt_global->orig_list_count); |
1309 | ||
d657e621 AQ |
1310 | out: |
1311 | if (orig_entry) | |
1312 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1313 | } |
1314 | ||
d4ff40f6 AQ |
1315 | /** |
1316 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1317 | * @bat_priv: the bat priv with all the soft interface information | |
1318 | * @orig_node: the originator announcing the client | |
1319 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1320 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1321 | * @flags: TT flags that have to be set for this non-mesh client |
1322 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1323 | * | |
1324 | * Add a new TT global entry for the given originator. If the entry already | |
1325 | * exists add a new reference to the given originator (a global entry can have | |
1326 | * references to multiple originators) and adjust the flags attribute to reflect | |
1327 | * the function argument. | |
1328 | * If a TT local entry exists for this non-mesh client remove it. | |
1329 | * | |
1330 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1331 | * |
1332 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1333 | */ |
1e5d49fc AQ |
1334 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1335 | struct batadv_orig_node *orig_node, | |
c018ad3d AQ |
1336 | const unsigned char *tt_addr, |
1337 | unsigned short vid, uint16_t flags, | |
1e5d49fc | 1338 | uint8_t ttvn) |
a73105b8 | 1339 | { |
170173bf SE |
1340 | struct batadv_tt_global_entry *tt_global_entry; |
1341 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1342 | bool ret = false; |
80b3f58c | 1343 | int hash_added; |
56303d34 | 1344 | struct batadv_tt_common_entry *common; |
7f91d06c | 1345 | uint16_t local_flags; |
c6c8fea2 | 1346 | |
cfd4f757 AQ |
1347 | /* ignore global entries from backbone nodes */ |
1348 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1349 | return true; | |
1350 | ||
c018ad3d AQ |
1351 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1352 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1353 | |
1354 | /* if the node already has a local client for this entry, it has to wait | |
1355 | * for a roaming advertisement instead of manually messing up the global | |
1356 | * table | |
1357 | */ | |
1358 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1359 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1360 | goto out; | |
a73105b8 AQ |
1361 | |
1362 | if (!tt_global_entry) { | |
d4f44692 | 1363 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1364 | if (!tt_global_entry) |
7683fdc1 AQ |
1365 | goto out; |
1366 | ||
c0a55929 | 1367 | common = &tt_global_entry->common; |
8fdd0153 | 1368 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1369 | common->vid = vid; |
db08e6e5 | 1370 | |
d4f44692 | 1371 | common->flags = flags; |
cc47f66e | 1372 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1373 | /* node must store current time in case of roaming. This is |
1374 | * needed to purge this entry out on timeout (if nobody claims | |
1375 | * it) | |
1376 | */ | |
1377 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1378 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1379 | atomic_set(&common->refcount, 2); |
30cfd02b | 1380 | common->added_at = jiffies; |
db08e6e5 SW |
1381 | |
1382 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1383 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1384 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1385 | |
807736f6 | 1386 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1387 | batadv_compare_tt, |
c018ad3d | 1388 | batadv_choose_tt, common, |
a513088d | 1389 | &common->hash_entry); |
80b3f58c SW |
1390 | |
1391 | if (unlikely(hash_added != 0)) { | |
1392 | /* remove the reference for the hash */ | |
a513088d | 1393 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1394 | goto out_remove; |
1395 | } | |
a73105b8 | 1396 | } else { |
068ee6e2 | 1397 | common = &tt_global_entry->common; |
30cfd02b AQ |
1398 | /* If there is already a global entry, we can use this one for |
1399 | * our processing. | |
068ee6e2 AQ |
1400 | * But if we are trying to add a temporary client then here are |
1401 | * two options at this point: | |
1402 | * 1) the global client is not a temporary client: the global | |
1403 | * client has to be left as it is, temporary information | |
1404 | * should never override any already known client state | |
1405 | * 2) the global client is a temporary client: purge the | |
1406 | * originator list and add the new one orig_entry | |
30cfd02b | 1407 | */ |
068ee6e2 AQ |
1408 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1409 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1410 | goto out; | |
1411 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1412 | orig_node)) | |
1413 | goto out_remove; | |
1414 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1415 | goto add_orig_entry; | |
1416 | } | |
30cfd02b AQ |
1417 | |
1418 | /* if the client was temporary added before receiving the first | |
1419 | * OGM announcing it, we have to clear the TEMP flag | |
1420 | */ | |
068ee6e2 | 1421 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 1422 | |
e9c00136 AQ |
1423 | /* the change can carry possible "attribute" flags like the |
1424 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1425 | * client entry | |
1426 | */ | |
1427 | tt_global_entry->common.flags |= flags; | |
1428 | ||
acd34afa SE |
1429 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1430 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1431 | * delete + roaming change for this originator. |
1432 | * | |
1433 | * We should first delete the old originator before adding the | |
1434 | * new one. | |
1435 | */ | |
068ee6e2 | 1436 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1437 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1438 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1439 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1440 | } |
1441 | } | |
068ee6e2 | 1442 | add_orig_entry: |
30cfd02b | 1443 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1444 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1445 | |
39c75a51 | 1446 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1447 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1448 | common->addr, BATADV_PRINT_VID(common->vid), | |
1449 | orig_node->orig); | |
1e5d49fc | 1450 | ret = true; |
c6c8fea2 | 1451 | |
80b3f58c | 1452 | out_remove: |
c5caf4ef LL |
1453 | /* Do not remove multicast addresses from the local hash on |
1454 | * global additions | |
1455 | */ | |
1456 | if (is_multicast_ether_addr(tt_addr)) | |
1457 | goto out; | |
7f91d06c | 1458 | |
a73105b8 | 1459 | /* remove address from local hash if present */ |
c018ad3d | 1460 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1461 | "global tt received", |
c1d07431 | 1462 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1463 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1464 | ||
068ee6e2 AQ |
1465 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1466 | /* this is a normal global add. Therefore the client is not in a | |
1467 | * roaming state anymore. | |
1468 | */ | |
1469 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1470 | ||
7683fdc1 AQ |
1471 | out: |
1472 | if (tt_global_entry) | |
a513088d | 1473 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1474 | if (tt_local_entry) |
1475 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1476 | return ret; |
c6c8fea2 SE |
1477 | } |
1478 | ||
1b371d13 SW |
1479 | /** |
1480 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1481 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1482 | * @tt_global_entry: global translation table entry to be analyzed |
1483 | * | |
1484 | * This functon assumes the caller holds rcu_read_lock(). | |
1485 | * Returns best originator list entry or NULL on errors. | |
1486 | */ | |
1487 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1488 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1489 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1490 | { |
4627456a AQ |
1491 | struct batadv_neigh_node *router, *best_router = NULL; |
1492 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1493 | struct hlist_head *head; |
981d8900 | 1494 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1495 | |
1496 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1497 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1498 | router = batadv_orig_router_get(orig_entry->orig_node, |
1499 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1500 | if (!router) |
1501 | continue; | |
1502 | ||
4627456a | 1503 | if (best_router && |
89652331 SW |
1504 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1505 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1506 | batadv_neigh_node_free_ref(router); |
1507 | continue; | |
981d8900 SE |
1508 | } |
1509 | ||
4627456a AQ |
1510 | /* release the refcount for the "old" best */ |
1511 | if (best_router) | |
1512 | batadv_neigh_node_free_ref(best_router); | |
1513 | ||
1514 | best_entry = orig_entry; | |
1515 | best_router = router; | |
981d8900 SE |
1516 | } |
1517 | ||
4627456a AQ |
1518 | if (best_router) |
1519 | batadv_neigh_node_free_ref(best_router); | |
1520 | ||
981d8900 SE |
1521 | return best_entry; |
1522 | } | |
1523 | ||
1b371d13 SW |
1524 | /** |
1525 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1526 | * for this global entry | |
4627456a | 1527 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1528 | * @tt_global_entry: global translation table entry to be printed |
1529 | * @seq: debugfs table seq_file struct | |
1530 | * | |
1531 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1532 | */ |
a513088d | 1533 | static void |
4627456a AQ |
1534 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1535 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1536 | struct seq_file *seq) |
db08e6e5 | 1537 | { |
981d8900 | 1538 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1539 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1540 | struct batadv_orig_node_vlan *vlan; |
1541 | struct hlist_head *head; | |
db08e6e5 | 1542 | uint8_t last_ttvn; |
7ea7b4a1 | 1543 | uint16_t flags; |
db08e6e5 SW |
1544 | |
1545 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1546 | flags = tt_common_entry->flags; |
1547 | ||
4627456a | 1548 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1549 | if (best_entry) { |
7ea7b4a1 AQ |
1550 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1551 | tt_common_entry->vid); | |
1552 | if (!vlan) { | |
1553 | seq_printf(seq, | |
1554 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1555 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1556 | best_entry->orig_node->orig); | |
1557 | goto print_list; | |
1558 | } | |
1559 | ||
981d8900 | 1560 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1561 | seq_printf(seq, |
dd24ddb2 | 1562 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1563 | '*', tt_global_entry->common.addr, |
16052789 | 1564 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1565 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1566 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1567 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1568 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1569 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1570 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1571 | |
1572 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1573 | } |
db08e6e5 | 1574 | |
7ea7b4a1 | 1575 | print_list: |
db08e6e5 SW |
1576 | head = &tt_global_entry->orig_list; |
1577 | ||
b67bfe0d | 1578 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1579 | if (best_entry == orig_entry) |
1580 | continue; | |
1581 | ||
7ea7b4a1 AQ |
1582 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1583 | tt_common_entry->vid); | |
1584 | if (!vlan) { | |
1585 | seq_printf(seq, | |
1586 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1587 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1588 | orig_entry->orig_node->orig); | |
1589 | continue; | |
1590 | } | |
1591 | ||
db08e6e5 | 1592 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1593 | seq_printf(seq, |
dd24ddb2 | 1594 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1595 | '+', tt_global_entry->common.addr, |
16052789 | 1596 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1597 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1598 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1599 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1600 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1601 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1602 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1603 | |
1604 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1605 | } |
1606 | } | |
1607 | ||
08c36d3e | 1608 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1609 | { |
1610 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1611 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1612 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1613 | struct batadv_tt_common_entry *tt_common_entry; |
1614 | struct batadv_tt_global_entry *tt_global; | |
1615 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1616 | struct hlist_head *head; |
c90681b8 | 1617 | uint32_t i; |
c6c8fea2 | 1618 | |
30da63a6 ML |
1619 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1620 | if (!primary_if) | |
32ae9b22 | 1621 | goto out; |
c6c8fea2 | 1622 | |
2dafb49d AQ |
1623 | seq_printf(seq, |
1624 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1625 | net_dev->name); |
16052789 AQ |
1626 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1627 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1628 | "CRC", "Flags"); | |
c6c8fea2 | 1629 | |
c6c8fea2 SE |
1630 | for (i = 0; i < hash->size; i++) { |
1631 | head = &hash->table[i]; | |
1632 | ||
7aadf889 | 1633 | rcu_read_lock(); |
b67bfe0d | 1634 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1635 | head, hash_entry) { |
56303d34 SE |
1636 | tt_global = container_of(tt_common_entry, |
1637 | struct batadv_tt_global_entry, | |
1638 | common); | |
4627456a | 1639 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1640 | } |
7aadf889 | 1641 | rcu_read_unlock(); |
c6c8fea2 | 1642 | } |
32ae9b22 ML |
1643 | out: |
1644 | if (primary_if) | |
e5d89254 | 1645 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1646 | return 0; |
c6c8fea2 SE |
1647 | } |
1648 | ||
1d8ab8d3 LL |
1649 | /** |
1650 | * batadv_tt_global_del_orig_entry - remove and free an orig_entry | |
1651 | * @tt_global_entry: the global entry to remove the orig_entry from | |
1652 | * @orig_entry: the orig entry to remove and free | |
1653 | * | |
1654 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1655 | * free this orig_entry afterwards. | |
1656 | */ | |
1657 | static void | |
1658 | batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, | |
1659 | struct batadv_tt_orig_list_entry *orig_entry) | |
1660 | { | |
1661 | batadv_tt_global_size_dec(orig_entry->orig_node, | |
1662 | tt_global_entry->common.vid); | |
1663 | atomic_dec(&tt_global_entry->orig_list_count); | |
1664 | hlist_del_rcu(&orig_entry->list); | |
1665 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1666 | } | |
1667 | ||
db08e6e5 | 1668 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1669 | static void |
56303d34 | 1670 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1671 | { |
db08e6e5 | 1672 | struct hlist_head *head; |
b67bfe0d | 1673 | struct hlist_node *safe; |
56303d34 | 1674 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1675 | |
db08e6e5 SW |
1676 | spin_lock_bh(&tt_global_entry->list_lock); |
1677 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 LL |
1678 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
1679 | batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); | |
db08e6e5 | 1680 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1681 | } |
1682 | ||
1d8ab8d3 LL |
1683 | /** |
1684 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1685 | * @bat_priv: the bat priv with all the soft interface information | |
1686 | * @tt_global_entry: the global entry to remove the orig_node from | |
1687 | * @orig_node: the originator announcing the client | |
1688 | * @message: message to append to the log on deletion | |
1689 | * | |
1690 | * Remove the given orig_node and its according orig_entry from the given | |
1691 | * global tt entry. | |
1692 | */ | |
a513088d | 1693 | static void |
1d8ab8d3 LL |
1694 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1695 | struct batadv_tt_global_entry *tt_global_entry, | |
1696 | struct batadv_orig_node *orig_node, | |
1697 | const char *message) | |
db08e6e5 SW |
1698 | { |
1699 | struct hlist_head *head; | |
b67bfe0d | 1700 | struct hlist_node *safe; |
56303d34 | 1701 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1702 | unsigned short vid; |
db08e6e5 SW |
1703 | |
1704 | spin_lock_bh(&tt_global_entry->list_lock); | |
1705 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1706 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1707 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1708 | vid = tt_global_entry->common.vid; |
39c75a51 | 1709 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1710 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1711 | orig_node->orig, |
16052789 AQ |
1712 | tt_global_entry->common.addr, |
1713 | BATADV_PRINT_VID(vid), message); | |
1d8ab8d3 LL |
1714 | batadv_tt_global_del_orig_entry(tt_global_entry, |
1715 | orig_entry); | |
db08e6e5 SW |
1716 | } |
1717 | } | |
1718 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1719 | } | |
1720 | ||
db08e6e5 | 1721 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1722 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1723 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1724 | */ |
a513088d | 1725 | static void |
56303d34 SE |
1726 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1727 | struct batadv_tt_global_entry *tt_global_entry, | |
1728 | struct batadv_orig_node *orig_node, | |
1729 | const char *message) | |
db08e6e5 SW |
1730 | { |
1731 | bool last_entry = true; | |
1732 | struct hlist_head *head; | |
56303d34 | 1733 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1734 | |
1735 | /* no local entry exists, case 1: | |
1736 | * Check if this is the last one or if other entries exist. | |
1737 | */ | |
1738 | ||
1739 | rcu_read_lock(); | |
1740 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1741 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1742 | if (orig_entry->orig_node != orig_node) { |
1743 | last_entry = false; | |
1744 | break; | |
1745 | } | |
1746 | } | |
1747 | rcu_read_unlock(); | |
1748 | ||
1749 | if (last_entry) { | |
1750 | /* its the last one, mark for roaming. */ | |
acd34afa | 1751 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1752 | tt_global_entry->roam_at = jiffies; |
1753 | } else | |
1754 | /* there is another entry, we can simply delete this | |
1755 | * one and can still use the other one. | |
1756 | */ | |
1d8ab8d3 LL |
1757 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1758 | orig_node, message); | |
db08e6e5 SW |
1759 | } |
1760 | ||
c018ad3d AQ |
1761 | /** |
1762 | * batadv_tt_global_del - remove a client from the global table | |
1763 | * @bat_priv: the bat priv with all the soft interface information | |
1764 | * @orig_node: an originator serving this client | |
1765 | * @addr: the mac address of the client | |
1766 | * @vid: VLAN identifier | |
1767 | * @message: a message explaining the reason for deleting the client to print | |
1768 | * for debugging purpose | |
1769 | * @roaming: true if the deletion has been triggered by a roaming event | |
1770 | */ | |
56303d34 SE |
1771 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1772 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1773 | const unsigned char *addr, unsigned short vid, |
a513088d | 1774 | const char *message, bool roaming) |
a73105b8 | 1775 | { |
170173bf | 1776 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1777 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1778 | |
c018ad3d | 1779 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1780 | if (!tt_global_entry) |
7683fdc1 | 1781 | goto out; |
a73105b8 | 1782 | |
db08e6e5 | 1783 | if (!roaming) { |
1d8ab8d3 LL |
1784 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1785 | orig_node, message); | |
db08e6e5 SW |
1786 | |
1787 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1788 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1789 | message); | |
db08e6e5 SW |
1790 | |
1791 | goto out; | |
1792 | } | |
92f90f56 SE |
1793 | |
1794 | /* if we are deleting a global entry due to a roam | |
1795 | * event, there are two possibilities: | |
db08e6e5 SW |
1796 | * 1) the client roamed from node A to node B => if there |
1797 | * is only one originator left for this client, we mark | |
acd34afa | 1798 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1799 | * wait for node B to claim it. In case of timeout |
1800 | * the entry is purged. | |
db08e6e5 SW |
1801 | * |
1802 | * If there are other originators left, we directly delete | |
1803 | * the originator. | |
92f90f56 | 1804 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1805 | * the global entry, since it is useless now. |
1806 | */ | |
a513088d | 1807 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1808 | tt_global_entry->common.addr, |
1809 | vid); | |
a513088d | 1810 | if (local_entry) { |
db08e6e5 | 1811 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1812 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1813 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1814 | } else |
1815 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1816 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1817 | orig_node, message); | |
92f90f56 | 1818 | |
cc47f66e | 1819 | out: |
7683fdc1 | 1820 | if (tt_global_entry) |
a513088d SE |
1821 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1822 | if (local_entry) | |
1823 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1824 | } |
1825 | ||
95fb130d AQ |
1826 | /** |
1827 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1828 | * given originator matching the provided vid | |
1829 | * @bat_priv: the bat priv with all the soft interface information | |
1830 | * @orig_node: the originator owning the entries to remove | |
1831 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1832 | * removed | |
1833 | * @message: debug message to print as "reason" | |
1834 | */ | |
56303d34 SE |
1835 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1836 | struct batadv_orig_node *orig_node, | |
95fb130d | 1837 | int32_t match_vid, |
56303d34 | 1838 | const char *message) |
c6c8fea2 | 1839 | { |
56303d34 SE |
1840 | struct batadv_tt_global_entry *tt_global; |
1841 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1842 | uint32_t i; |
807736f6 | 1843 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1844 | struct hlist_node *safe; |
a73105b8 | 1845 | struct hlist_head *head; |
7683fdc1 | 1846 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1847 | unsigned short vid; |
c6c8fea2 | 1848 | |
6e801494 SW |
1849 | if (!hash) |
1850 | return; | |
1851 | ||
a73105b8 AQ |
1852 | for (i = 0; i < hash->size; i++) { |
1853 | head = &hash->table[i]; | |
7683fdc1 | 1854 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1855 | |
7683fdc1 | 1856 | spin_lock_bh(list_lock); |
b67bfe0d | 1857 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1858 | head, hash_entry) { |
95fb130d AQ |
1859 | /* remove only matching entries */ |
1860 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1861 | continue; | |
1862 | ||
56303d34 SE |
1863 | tt_global = container_of(tt_common_entry, |
1864 | struct batadv_tt_global_entry, | |
1865 | common); | |
db08e6e5 | 1866 | |
1d8ab8d3 LL |
1867 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1868 | orig_node, message); | |
db08e6e5 | 1869 | |
56303d34 | 1870 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1871 | vid = tt_global->common.vid; |
39c75a51 | 1872 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1873 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1874 | tt_global->common.addr, | |
1875 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1876 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1877 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1878 | } |
a73105b8 | 1879 | } |
7683fdc1 | 1880 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1881 | } |
e17931d1 | 1882 | orig_node->capa_initialized &= ~BATADV_ORIG_CAPA_HAS_TT; |
c6c8fea2 SE |
1883 | } |
1884 | ||
30cfd02b AQ |
1885 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1886 | char **msg) | |
cc47f66e | 1887 | { |
30cfd02b AQ |
1888 | bool purge = false; |
1889 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1890 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1891 | |
30cfd02b AQ |
1892 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1893 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1894 | purge = true; | |
1895 | *msg = "Roaming timeout\n"; | |
1896 | } | |
42d0b044 | 1897 | |
30cfd02b AQ |
1898 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1899 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1900 | purge = true; | |
1901 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1902 | } |
30cfd02b AQ |
1903 | |
1904 | return purge; | |
42d0b044 SE |
1905 | } |
1906 | ||
30cfd02b | 1907 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1908 | { |
807736f6 | 1909 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1910 | struct hlist_head *head; |
b67bfe0d | 1911 | struct hlist_node *node_tmp; |
7683fdc1 | 1912 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1913 | uint32_t i; |
30cfd02b AQ |
1914 | char *msg = NULL; |
1915 | struct batadv_tt_common_entry *tt_common; | |
1916 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1917 | |
cc47f66e AQ |
1918 | for (i = 0; i < hash->size; i++) { |
1919 | head = &hash->table[i]; | |
7683fdc1 | 1920 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1921 | |
7683fdc1 | 1922 | spin_lock_bh(list_lock); |
b67bfe0d | 1923 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1924 | hash_entry) { |
1925 | tt_global = container_of(tt_common, | |
1926 | struct batadv_tt_global_entry, | |
1927 | common); | |
1928 | ||
1929 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1930 | continue; | |
1931 | ||
1932 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1933 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1934 | tt_global->common.addr, | |
1935 | BATADV_PRINT_VID(tt_global->common.vid), | |
1936 | msg); | |
30cfd02b | 1937 | |
b67bfe0d | 1938 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1939 | |
1940 | batadv_tt_global_entry_free_ref(tt_global); | |
1941 | } | |
7683fdc1 | 1942 | spin_unlock_bh(list_lock); |
cc47f66e | 1943 | } |
cc47f66e AQ |
1944 | } |
1945 | ||
56303d34 | 1946 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1947 | { |
5bf74e9c | 1948 | struct batadv_hashtable *hash; |
7683fdc1 | 1949 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1950 | struct batadv_tt_common_entry *tt_common_entry; |
1951 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1952 | struct hlist_node *node_tmp; |
7683fdc1 | 1953 | struct hlist_head *head; |
c90681b8 | 1954 | uint32_t i; |
7683fdc1 | 1955 | |
807736f6 | 1956 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1957 | return; |
1958 | ||
807736f6 | 1959 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1960 | |
1961 | for (i = 0; i < hash->size; i++) { | |
1962 | head = &hash->table[i]; | |
1963 | list_lock = &hash->list_locks[i]; | |
1964 | ||
1965 | spin_lock_bh(list_lock); | |
b67bfe0d | 1966 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1967 | head, hash_entry) { |
b67bfe0d | 1968 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1969 | tt_global = container_of(tt_common_entry, |
1970 | struct batadv_tt_global_entry, | |
1971 | common); | |
1972 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1973 | } |
1974 | spin_unlock_bh(list_lock); | |
1975 | } | |
1976 | ||
1a8eaf07 | 1977 | batadv_hash_destroy(hash); |
7683fdc1 | 1978 | |
807736f6 | 1979 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1980 | } |
1981 | ||
56303d34 SE |
1982 | static bool |
1983 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1984 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1985 | { |
1986 | bool ret = false; | |
1987 | ||
acd34afa SE |
1988 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1989 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1990 | ret = true; |
1991 | ||
2d2fcc2a AQ |
1992 | /* check if the two clients are marked as isolated */ |
1993 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
1994 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
1995 | ret = true; | |
1996 | ||
59b699cd AQ |
1997 | return ret; |
1998 | } | |
1999 | ||
c018ad3d AQ |
2000 | /** |
2001 | * batadv_transtable_search - get the mesh destination for a given client | |
2002 | * @bat_priv: the bat priv with all the soft interface information | |
2003 | * @src: mac address of the source client | |
2004 | * @addr: mac address of the destination client | |
2005 | * @vid: VLAN identifier | |
2006 | * | |
2007 | * Returns a pointer to the originator that was selected as destination in the | |
2008 | * mesh for contacting the client 'addr', NULL otherwise. | |
2009 | * In case of multiple originators serving the same client, the function returns | |
2010 | * the best one (best in terms of metric towards the destination node). | |
2011 | * | |
2012 | * If the two clients are AP isolated the function returns NULL. | |
2013 | */ | |
56303d34 SE |
2014 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
2015 | const uint8_t *src, | |
c018ad3d AQ |
2016 | const uint8_t *addr, |
2017 | unsigned short vid) | |
c6c8fea2 | 2018 | { |
56303d34 SE |
2019 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2020 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2021 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2022 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2023 | |
eceb22ae | 2024 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2025 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2026 | if (!tt_local_entry || |
2027 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2028 | goto out; |
2029 | } | |
7aadf889 | 2030 | |
c018ad3d | 2031 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2032 | if (!tt_global_entry) |
7b36e8ee | 2033 | goto out; |
7aadf889 | 2034 | |
3d393e47 | 2035 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2036 | * isolation |
2037 | */ | |
a513088d SE |
2038 | if (tt_local_entry && |
2039 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2040 | goto out; |
2041 | ||
db08e6e5 | 2042 | rcu_read_lock(); |
4627456a | 2043 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2044 | /* found anything? */ |
981d8900 SE |
2045 | if (best_entry) |
2046 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
2047 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
2048 | orig_node = NULL; | |
2049 | rcu_read_unlock(); | |
981d8900 | 2050 | |
7b36e8ee | 2051 | out: |
3d393e47 | 2052 | if (tt_global_entry) |
a513088d | 2053 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 2054 | if (tt_local_entry) |
a513088d | 2055 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 2056 | |
7b36e8ee | 2057 | return orig_node; |
c6c8fea2 | 2058 | } |
a73105b8 | 2059 | |
ced72933 AQ |
2060 | /** |
2061 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2062 | * to the given orig_node | |
2063 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2064 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2065 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2066 | * |
2067 | * This function computes the checksum for the global table corresponding to a | |
2068 | * specific originator. In particular, the checksum is computed as follows: For | |
2069 | * each client connected to the originator the CRC32C of the MAC address and the | |
2070 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2071 | * together. | |
2072 | * | |
2073 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2074 | * produce a unique hash of the table, but since the order which is used to feed | |
2075 | * the CRC32C function affects the result and since every node in the network | |
2076 | * probably sorts the clients differently, the hash function cannot be directly | |
2077 | * computed over the entire table. Hence the CRC32C is used only on | |
2078 | * the single client entry, while all the results are then xor'ed together | |
2079 | * because the XOR operation can combine them all while trying to reduce the | |
2080 | * noise as much as possible. | |
2081 | * | |
2082 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
2083 | */ |
2084 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
7ea7b4a1 AQ |
2085 | struct batadv_orig_node *orig_node, |
2086 | unsigned short vid) | |
a73105b8 | 2087 | { |
807736f6 | 2088 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2089 | struct batadv_tt_common_entry *tt_common; |
2090 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2091 | struct hlist_head *head; |
0ffa9e8d | 2092 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2093 | uint8_t flags; |
a30e22ca | 2094 | __be16 tmp_vid; |
a73105b8 AQ |
2095 | |
2096 | for (i = 0; i < hash->size; i++) { | |
2097 | head = &hash->table[i]; | |
2098 | ||
2099 | rcu_read_lock(); | |
b67bfe0d | 2100 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2101 | tt_global = container_of(tt_common, |
2102 | struct batadv_tt_global_entry, | |
2103 | common); | |
7ea7b4a1 AQ |
2104 | /* compute the CRC only for entries belonging to the |
2105 | * VLAN identified by the vid passed as parameter | |
2106 | */ | |
2107 | if (tt_common->vid != vid) | |
2108 | continue; | |
2109 | ||
db08e6e5 SW |
2110 | /* Roaming clients are in the global table for |
2111 | * consistency only. They don't have to be | |
2112 | * taken into account while computing the | |
2113 | * global crc | |
2114 | */ | |
acd34afa | 2115 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2116 | continue; |
30cfd02b AQ |
2117 | /* Temporary clients have not been announced yet, so |
2118 | * they have to be skipped while computing the global | |
2119 | * crc | |
2120 | */ | |
2121 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2122 | continue; | |
db08e6e5 SW |
2123 | |
2124 | /* find out if this global entry is announced by this | |
2125 | * originator | |
2126 | */ | |
56303d34 | 2127 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2128 | orig_node)) |
db08e6e5 SW |
2129 | continue; |
2130 | ||
a30e22ca AQ |
2131 | /* use network order to read the VID: this ensures that |
2132 | * every node reads the bytes in the same order. | |
2133 | */ | |
2134 | tmp_vid = htons(tt_common->vid); | |
2135 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2136 | |
2137 | /* compute the CRC on flags that have to be kept in sync | |
2138 | * among nodes | |
2139 | */ | |
2140 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2141 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2142 | ||
0ffa9e8d | 2143 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2144 | } |
2145 | rcu_read_unlock(); | |
2146 | } | |
2147 | ||
ced72933 | 2148 | return crc; |
a73105b8 AQ |
2149 | } |
2150 | ||
ced72933 AQ |
2151 | /** |
2152 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2153 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2154 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2155 | * |
2156 | * For details about the computation, please refer to the documentation for | |
2157 | * batadv_tt_global_crc(). | |
2158 | * | |
2159 | * Returns the checksum of the local table | |
ced72933 | 2160 | */ |
7ea7b4a1 AQ |
2161 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2162 | unsigned short vid) | |
a73105b8 | 2163 | { |
807736f6 | 2164 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2165 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2166 | struct hlist_head *head; |
0ffa9e8d | 2167 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2168 | uint8_t flags; |
a30e22ca | 2169 | __be16 tmp_vid; |
a73105b8 AQ |
2170 | |
2171 | for (i = 0; i < hash->size; i++) { | |
2172 | head = &hash->table[i]; | |
2173 | ||
2174 | rcu_read_lock(); | |
b67bfe0d | 2175 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2176 | /* compute the CRC only for entries belonging to the |
2177 | * VLAN identified by vid | |
2178 | */ | |
2179 | if (tt_common->vid != vid) | |
2180 | continue; | |
2181 | ||
058d0e26 | 2182 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2183 | * account while computing the CRC |
2184 | */ | |
acd34afa | 2185 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2186 | continue; |
ced72933 | 2187 | |
a30e22ca AQ |
2188 | /* use network order to read the VID: this ensures that |
2189 | * every node reads the bytes in the same order. | |
2190 | */ | |
2191 | tmp_vid = htons(tt_common->vid); | |
2192 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2193 | |
2194 | /* compute the CRC on flags that have to be kept in sync | |
2195 | * among nodes | |
2196 | */ | |
2197 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2198 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2199 | ||
0ffa9e8d | 2200 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2201 | } |
a73105b8 AQ |
2202 | rcu_read_unlock(); |
2203 | } | |
2204 | ||
ced72933 | 2205 | return crc; |
a73105b8 AQ |
2206 | } |
2207 | ||
56303d34 | 2208 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2209 | { |
56303d34 | 2210 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2211 | |
807736f6 | 2212 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2213 | |
807736f6 | 2214 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
2215 | list_del(&node->list); |
2216 | kfree(node); | |
2217 | } | |
2218 | ||
807736f6 | 2219 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2220 | } |
2221 | ||
56303d34 SE |
2222 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2223 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
2224 | const void *tt_buff, |
2225 | uint16_t tt_buff_len) | |
a73105b8 | 2226 | { |
a73105b8 | 2227 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2228 | * last OGM (the OGM could carry no changes) |
2229 | */ | |
a73105b8 AQ |
2230 | spin_lock_bh(&orig_node->tt_buff_lock); |
2231 | if (tt_buff_len > 0) { | |
2232 | kfree(orig_node->tt_buff); | |
2233 | orig_node->tt_buff_len = 0; | |
2234 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2235 | if (orig_node->tt_buff) { | |
2236 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2237 | orig_node->tt_buff_len = tt_buff_len; | |
2238 | } | |
2239 | } | |
2240 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2241 | } | |
2242 | ||
56303d34 | 2243 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2244 | { |
56303d34 | 2245 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2246 | |
807736f6 SE |
2247 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2248 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
2249 | if (batadv_has_timed_out(node->issued_at, |
2250 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
2251 | list_del(&node->list); |
2252 | kfree(node); | |
2253 | } | |
2254 | } | |
807736f6 | 2255 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2256 | } |
2257 | ||
2258 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
2259 | * has already been issued for this orig_node, NULL otherwise |
2260 | */ | |
56303d34 SE |
2261 | static struct batadv_tt_req_node * |
2262 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
2263 | struct batadv_orig_node *orig_node) | |
a73105b8 | 2264 | { |
56303d34 | 2265 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2266 | |
807736f6 SE |
2267 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2268 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
2269 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2270 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2271 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2272 | goto unlock; |
2273 | } | |
2274 | ||
2275 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2276 | if (!tt_req_node) | |
2277 | goto unlock; | |
2278 | ||
8fdd0153 | 2279 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2280 | tt_req_node->issued_at = jiffies; |
2281 | ||
807736f6 | 2282 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2283 | unlock: |
807736f6 | 2284 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2285 | return tt_req_node; |
2286 | } | |
2287 | ||
335fbe0f ML |
2288 | /** |
2289 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2290 | * @entry_ptr: to be checked local tt entry | |
2291 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2292 | * | |
2293 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2294 | */ | |
2295 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2296 | { |
56303d34 | 2297 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2298 | |
acd34afa | 2299 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2300 | return 0; |
2301 | return 1; | |
2302 | } | |
2303 | ||
a513088d SE |
2304 | static int batadv_tt_global_valid(const void *entry_ptr, |
2305 | const void *data_ptr) | |
a73105b8 | 2306 | { |
56303d34 SE |
2307 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2308 | const struct batadv_tt_global_entry *tt_global_entry; | |
2309 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2310 | |
30cfd02b AQ |
2311 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2312 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2313 | return 0; |
2314 | ||
56303d34 SE |
2315 | tt_global_entry = container_of(tt_common_entry, |
2316 | struct batadv_tt_global_entry, | |
48100bac AQ |
2317 | common); |
2318 | ||
a513088d | 2319 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2320 | } |
2321 | ||
335fbe0f | 2322 | /** |
7ea7b4a1 AQ |
2323 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2324 | * specified tt hash | |
335fbe0f ML |
2325 | * @bat_priv: the bat priv with all the soft interface information |
2326 | * @hash: hash table containing the tt entries | |
2327 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2328 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2329 | * @valid_cb: function to filter tt change entries |
2330 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2331 | */ |
7ea7b4a1 AQ |
2332 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2333 | struct batadv_hashtable *hash, | |
2334 | void *tvlv_buff, uint16_t tt_len, | |
2335 | int (*valid_cb)(const void *, const void *), | |
2336 | void *cb_data) | |
a73105b8 | 2337 | { |
56303d34 | 2338 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2339 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2340 | struct hlist_head *head; |
335fbe0f | 2341 | uint16_t tt_tot, tt_num_entries = 0; |
c90681b8 | 2342 | uint32_t i; |
a73105b8 | 2343 | |
298e6e68 | 2344 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2345 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2346 | |
2347 | rcu_read_lock(); | |
2348 | for (i = 0; i < hash->size; i++) { | |
2349 | head = &hash->table[i]; | |
2350 | ||
b67bfe0d | 2351 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2352 | head, hash_entry) { |
335fbe0f | 2353 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2354 | break; |
2355 | ||
48100bac | 2356 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2357 | continue; |
2358 | ||
8fdd0153 | 2359 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2360 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2361 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2362 | memset(tt_change->reserved, 0, |
2363 | sizeof(tt_change->reserved)); | |
a73105b8 | 2364 | |
335fbe0f | 2365 | tt_num_entries++; |
a73105b8 AQ |
2366 | tt_change++; |
2367 | } | |
2368 | } | |
2369 | rcu_read_unlock(); | |
7ea7b4a1 | 2370 | } |
a73105b8 | 2371 | |
7ea7b4a1 AQ |
2372 | /** |
2373 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2374 | * @orig_node: originator for which the CRCs have to be checked | |
2375 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2376 | * @num_vlan: number of tvlv VLAN entries | |
2377 | * @create: if true, create VLAN objects if not found | |
2378 | * | |
2379 | * Return true if all the received CRCs match the locally stored ones, false | |
2380 | * otherwise | |
2381 | */ | |
2382 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2383 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2384 | uint16_t num_vlan) | |
2385 | { | |
2386 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2387 | struct batadv_orig_node_vlan *vlan; | |
91c2b1a9 | 2388 | uint32_t crc; |
7ea7b4a1 AQ |
2389 | int i; |
2390 | ||
2391 | /* check if each received CRC matches the locally stored one */ | |
2392 | for (i = 0; i < num_vlan; i++) { | |
2393 | tt_vlan_tmp = tt_vlan + i; | |
2394 | ||
2395 | /* if orig_node is a backbone node for this VLAN, don't check | |
2396 | * the CRC as we ignore all the global entries over it | |
2397 | */ | |
2398 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2399 | orig_node->orig, |
2400 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2401 | continue; |
2402 | ||
2403 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2404 | ntohs(tt_vlan_tmp->vid)); | |
2405 | if (!vlan) | |
2406 | return false; | |
2407 | ||
91c2b1a9 AQ |
2408 | crc = vlan->tt.crc; |
2409 | batadv_orig_node_vlan_free_ref(vlan); | |
2410 | ||
2411 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2412 | return false; |
2413 | } | |
2414 | ||
2415 | return true; | |
2416 | } | |
2417 | ||
2418 | /** | |
2419 | * batadv_tt_local_update_crc - update all the local CRCs | |
2420 | * @bat_priv: the bat priv with all the soft interface information | |
2421 | */ | |
2422 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2423 | { | |
2424 | struct batadv_softif_vlan *vlan; | |
2425 | ||
2426 | /* recompute the global CRC for each VLAN */ | |
2427 | rcu_read_lock(); | |
2428 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2429 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2430 | } | |
2431 | rcu_read_unlock(); | |
2432 | } | |
2433 | ||
2434 | /** | |
2435 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2436 | * @bat_priv: the bat priv with all the soft interface information | |
2437 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2438 | */ | |
2439 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2440 | struct batadv_orig_node *orig_node) | |
2441 | { | |
2442 | struct batadv_orig_node_vlan *vlan; | |
2443 | uint32_t crc; | |
2444 | ||
2445 | /* recompute the global CRC for each VLAN */ | |
2446 | rcu_read_lock(); | |
2447 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
2448 | /* if orig_node is a backbone node for this VLAN, don't compute | |
2449 | * the CRC as we ignore all the global entries over it | |
2450 | */ | |
cfd4f757 AQ |
2451 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2452 | vlan->vid)) | |
7ea7b4a1 AQ |
2453 | continue; |
2454 | ||
2455 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2456 | vlan->tt.crc = crc; | |
2457 | } | |
2458 | rcu_read_unlock(); | |
a73105b8 AQ |
2459 | } |
2460 | ||
ced72933 AQ |
2461 | /** |
2462 | * batadv_send_tt_request - send a TT Request message to a given node | |
2463 | * @bat_priv: the bat priv with all the soft interface information | |
2464 | * @dst_orig_node: the destination of the message | |
2465 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2466 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2467 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2468 | * @full_table: ask for the entire translation table if true, while only for the |
2469 | * last TT diff otherwise | |
2470 | */ | |
56303d34 SE |
2471 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2472 | struct batadv_orig_node *dst_orig_node, | |
7ea7b4a1 AQ |
2473 | uint8_t ttvn, |
2474 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2475 | uint16_t num_vlan, bool full_table) | |
a73105b8 | 2476 | { |
335fbe0f | 2477 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2478 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2479 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2480 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2481 | bool ret = false; |
7ea7b4a1 | 2482 | int i, size; |
a73105b8 | 2483 | |
e5d89254 | 2484 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2485 | if (!primary_if) |
2486 | goto out; | |
2487 | ||
2488 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2489 | * reply from the same orig_node yet |
2490 | */ | |
a513088d | 2491 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
2492 | if (!tt_req_node) |
2493 | goto out; | |
2494 | ||
7ea7b4a1 AQ |
2495 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2496 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2497 | if (!tvlv_tt_data) |
a73105b8 AQ |
2498 | goto out; |
2499 | ||
335fbe0f ML |
2500 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2501 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2502 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2503 | ||
2504 | /* send all the CRCs within the request. This is needed by intermediate | |
2505 | * nodes to ensure they have the correct table before replying | |
2506 | */ | |
2507 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2508 | for (i = 0; i < num_vlan; i++) { | |
2509 | tt_vlan_req->vid = tt_vlan->vid; | |
2510 | tt_vlan_req->crc = tt_vlan->crc; | |
2511 | ||
2512 | tt_vlan_req++; | |
2513 | tt_vlan++; | |
2514 | } | |
a73105b8 AQ |
2515 | |
2516 | if (full_table) | |
335fbe0f | 2517 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2518 | |
bb351ba0 | 2519 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2520 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2521 | |
d69909d2 | 2522 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2523 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2524 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2525 | tvlv_tt_data, size); |
335fbe0f | 2526 | ret = true; |
a73105b8 AQ |
2527 | |
2528 | out: | |
a73105b8 | 2529 | if (primary_if) |
e5d89254 | 2530 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2531 | if (ret && tt_req_node) { |
807736f6 | 2532 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2533 | list_del(&tt_req_node->list); |
807736f6 | 2534 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2535 | kfree(tt_req_node); |
2536 | } | |
335fbe0f | 2537 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2538 | return ret; |
2539 | } | |
2540 | ||
335fbe0f ML |
2541 | /** |
2542 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2543 | * node's translation table | |
2544 | * @bat_priv: the bat priv with all the soft interface information | |
2545 | * @tt_data: tt data containing the tt request information | |
2546 | * @req_src: mac address of tt request sender | |
2547 | * @req_dst: mac address of tt request recipient | |
2548 | * | |
2549 | * Returns true if tt request reply was sent, false otherwise. | |
2550 | */ | |
2551 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2552 | struct batadv_tvlv_tt_data *tt_data, | |
2553 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2554 | { |
170173bf | 2555 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2556 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2557 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2558 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2559 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2560 | bool ret = false, full_table; |
7ea7b4a1 AQ |
2561 | uint8_t orig_ttvn, req_ttvn; |
2562 | uint16_t tvlv_len; | |
2563 | int32_t tt_len; | |
a73105b8 | 2564 | |
39c75a51 | 2565 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2566 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 2567 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 2568 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
2569 | |
2570 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2571 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2572 | if (!req_dst_orig_node) |
2573 | goto out; | |
2574 | ||
335fbe0f | 2575 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2576 | if (!res_dst_orig_node) |
2577 | goto out; | |
2578 | ||
a73105b8 | 2579 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2580 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2581 | |
7ea7b4a1 | 2582 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2583 | /* this node doesn't have the requested data */ |
a73105b8 | 2584 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2585 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2586 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2587 | goto out; |
2588 | ||
015758d0 | 2589 | /* If the full table has been explicitly requested */ |
335fbe0f | 2590 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2591 | !req_dst_orig_node->tt_buff) |
2592 | full_table = true; | |
2593 | else | |
2594 | full_table = false; | |
2595 | ||
335fbe0f ML |
2596 | /* TT fragmentation hasn't been implemented yet, so send as many |
2597 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2598 | */ |
a73105b8 AQ |
2599 | if (!full_table) { |
2600 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2601 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2602 | |
7ea7b4a1 AQ |
2603 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2604 | &tvlv_tt_data, | |
2605 | &tt_change, | |
2606 | &tt_len); | |
2607 | if (!tt_len) | |
a73105b8 AQ |
2608 | goto unlock; |
2609 | ||
a73105b8 | 2610 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2611 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2612 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2613 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2614 | } else { | |
7ea7b4a1 AQ |
2615 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2616 | * in the initial part | |
2617 | */ | |
2618 | tt_len = -1; | |
2619 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2620 | &tvlv_tt_data, | |
2621 | &tt_change, | |
2622 | &tt_len); | |
2623 | if (!tt_len) | |
a73105b8 | 2624 | goto out; |
7ea7b4a1 AQ |
2625 | |
2626 | /* fill the rest of the tvlv with the real TT entries */ | |
2627 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2628 | tt_change, tt_len, | |
2629 | batadv_tt_global_valid, | |
2630 | req_dst_orig_node); | |
a73105b8 AQ |
2631 | } |
2632 | ||
a19d3d85 ML |
2633 | /* Don't send the response, if larger than fragmented packet. */ |
2634 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2635 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2636 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2637 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2638 | res_dst_orig_node->orig); | |
2639 | goto out; | |
2640 | } | |
2641 | ||
335fbe0f ML |
2642 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2643 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2644 | |
2645 | if (full_table) | |
335fbe0f | 2646 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2647 | |
39c75a51 | 2648 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2649 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2650 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2651 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2652 | |
d69909d2 | 2653 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2654 | |
335fbe0f | 2655 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2656 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2657 | tvlv_len); | |
e91ecfc6 | 2658 | |
335fbe0f | 2659 | ret = true; |
a73105b8 AQ |
2660 | goto out; |
2661 | ||
2662 | unlock: | |
2663 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2664 | ||
2665 | out: | |
2666 | if (res_dst_orig_node) | |
7d211efc | 2667 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2668 | if (req_dst_orig_node) |
7d211efc | 2669 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2670 | kfree(tvlv_tt_data); |
a73105b8 | 2671 | return ret; |
a73105b8 | 2672 | } |
96412690 | 2673 | |
335fbe0f ML |
2674 | /** |
2675 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2676 | * translation table | |
2677 | * @bat_priv: the bat priv with all the soft interface information | |
2678 | * @tt_data: tt data containing the tt request information | |
2679 | * @req_src: mac address of tt request sender | |
2680 | * | |
2681 | * Returns true if tt request reply was sent, false otherwise. | |
2682 | */ | |
2683 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2684 | struct batadv_tvlv_tt_data *tt_data, | |
2685 | uint8_t *req_src) | |
a73105b8 | 2686 | { |
335fbe0f | 2687 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2688 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2689 | struct batadv_tvlv_tt_change *tt_change; |
2690 | struct batadv_orig_node *orig_node; | |
335fbe0f | 2691 | uint8_t my_ttvn, req_ttvn; |
7ea7b4a1 | 2692 | uint16_t tvlv_len; |
a73105b8 | 2693 | bool full_table; |
7ea7b4a1 | 2694 | int32_t tt_len; |
a73105b8 | 2695 | |
39c75a51 | 2696 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2697 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 2698 | req_src, tt_data->ttvn, |
a2f2b6cd | 2699 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2700 | |
a70a9aa9 | 2701 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2702 | |
807736f6 | 2703 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2704 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2705 | |
335fbe0f | 2706 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2707 | if (!orig_node) |
2708 | goto out; | |
2709 | ||
e5d89254 | 2710 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2711 | if (!primary_if) |
2712 | goto out; | |
2713 | ||
2714 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2715 | * is too big send the whole local translation table |
2716 | */ | |
335fbe0f | 2717 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2718 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2719 | full_table = true; |
2720 | else | |
2721 | full_table = false; | |
2722 | ||
335fbe0f ML |
2723 | /* TT fragmentation hasn't been implemented yet, so send as many |
2724 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2725 | */ |
a73105b8 | 2726 | if (!full_table) { |
807736f6 | 2727 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2728 | |
7ea7b4a1 AQ |
2729 | tt_len = bat_priv->tt.last_changeset_len; |
2730 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2731 | &tvlv_tt_data, | |
2732 | &tt_change, | |
2733 | &tt_len); | |
2734 | if (!tt_len) | |
a73105b8 AQ |
2735 | goto unlock; |
2736 | ||
335fbe0f | 2737 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2738 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2739 | bat_priv->tt.last_changeset_len); |
2740 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2741 | } else { |
335fbe0f ML |
2742 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
2743 | ||
7ea7b4a1 AQ |
2744 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2745 | * in the initial part | |
2746 | */ | |
2747 | tt_len = -1; | |
2748 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2749 | &tvlv_tt_data, | |
2750 | &tt_change, | |
2751 | &tt_len); | |
2752 | if (!tt_len) | |
a73105b8 | 2753 | goto out; |
7ea7b4a1 AQ |
2754 | |
2755 | /* fill the rest of the tvlv with the real TT entries */ | |
2756 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2757 | tt_change, tt_len, | |
2758 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2759 | } |
2760 | ||
335fbe0f ML |
2761 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2762 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2763 | |
2764 | if (full_table) | |
335fbe0f | 2765 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2766 | |
39c75a51 | 2767 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2768 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2769 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2770 | |
d69909d2 | 2771 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2772 | |
335fbe0f | 2773 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2774 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2775 | tvlv_len); | |
335fbe0f | 2776 | |
a73105b8 AQ |
2777 | goto out; |
2778 | ||
2779 | unlock: | |
807736f6 | 2780 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2781 | out: |
a70a9aa9 | 2782 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2783 | if (orig_node) |
7d211efc | 2784 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2785 | if (primary_if) |
e5d89254 | 2786 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2787 | kfree(tvlv_tt_data); |
2788 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2789 | return true; |
2790 | } | |
2791 | ||
335fbe0f ML |
2792 | /** |
2793 | * batadv_send_tt_response - send reply to tt request | |
2794 | * @bat_priv: the bat priv with all the soft interface information | |
2795 | * @tt_data: tt data containing the tt request information | |
2796 | * @req_src: mac address of tt request sender | |
2797 | * @req_dst: mac address of tt request recipient | |
2798 | * | |
2799 | * Returns true if tt request reply was sent, false otherwise. | |
2800 | */ | |
2801 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2802 | struct batadv_tvlv_tt_data *tt_data, | |
2803 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2804 | { |
cfd4f757 | 2805 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2806 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
2807 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
2808 | req_dst); | |
a73105b8 AQ |
2809 | } |
2810 | ||
56303d34 SE |
2811 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2812 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2813 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2814 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2815 | { |
2816 | int i; | |
a513088d | 2817 | int roams; |
a73105b8 AQ |
2818 | |
2819 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2820 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2821 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2822 | batadv_tt_global_del(bat_priv, orig_node, |
2823 | (tt_change + i)->addr, | |
c018ad3d | 2824 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2825 | "tt removed by changes", |
2826 | roams); | |
08c36d3e | 2827 | } else { |
08c36d3e | 2828 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2829 | (tt_change + i)->addr, |
c018ad3d | 2830 | ntohs((tt_change + i)->vid), |
d4f44692 | 2831 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2832 | /* In case of problem while storing a |
2833 | * global_entry, we stop the updating | |
2834 | * procedure without committing the | |
2835 | * ttvn change. This will avoid to send | |
2836 | * corrupted data on tt_request | |
2837 | */ | |
2838 | return; | |
08c36d3e | 2839 | } |
a73105b8 | 2840 | } |
e17931d1 | 2841 | orig_node->capa_initialized |= BATADV_ORIG_CAPA_HAS_TT; |
a73105b8 AQ |
2842 | } |
2843 | ||
56303d34 | 2844 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 AQ |
2845 | struct batadv_tvlv_tt_change *tt_change, |
2846 | uint8_t ttvn, uint8_t *resp_src, | |
2847 | uint16_t num_entries) | |
a73105b8 | 2848 | { |
170173bf | 2849 | struct batadv_orig_node *orig_node; |
a73105b8 | 2850 | |
335fbe0f | 2851 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2852 | if (!orig_node) |
2853 | goto out; | |
2854 | ||
2855 | /* Purge the old table first.. */ | |
95fb130d AQ |
2856 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2857 | "Received full table"); | |
a73105b8 | 2858 | |
7ea7b4a1 AQ |
2859 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2860 | ttvn); | |
a73105b8 AQ |
2861 | |
2862 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2863 | kfree(orig_node->tt_buff); | |
2864 | orig_node->tt_buff_len = 0; | |
2865 | orig_node->tt_buff = NULL; | |
2866 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2867 | ||
7ea7b4a1 | 2868 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2869 | |
2870 | out: | |
2871 | if (orig_node) | |
7d211efc | 2872 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2873 | } |
2874 | ||
56303d34 SE |
2875 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2876 | struct batadv_orig_node *orig_node, | |
a513088d | 2877 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2878 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2879 | { |
a513088d SE |
2880 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2881 | tt_num_changes, ttvn); | |
a73105b8 | 2882 | |
e8cf234a AQ |
2883 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2884 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2885 | atomic_set(&orig_node->last_ttvn, ttvn); |
2886 | } | |
2887 | ||
c018ad3d AQ |
2888 | /** |
2889 | * batadv_is_my_client - check if a client is served by the local node | |
2890 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 2891 | * @addr: the mac address of the client to check |
c018ad3d AQ |
2892 | * @vid: VLAN identifier |
2893 | * | |
2894 | * Returns true if the client is served by this node, false otherwise. | |
2895 | */ | |
2896 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2897 | unsigned short vid) | |
a73105b8 | 2898 | { |
170173bf | 2899 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2900 | bool ret = false; |
a73105b8 | 2901 | |
c018ad3d | 2902 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2903 | if (!tt_local_entry) |
2904 | goto out; | |
058d0e26 | 2905 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2906 | * consistency purpose) |
2907 | */ | |
7c1fd91d AQ |
2908 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2909 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2910 | goto out; |
7683fdc1 AQ |
2911 | ret = true; |
2912 | out: | |
a73105b8 | 2913 | if (tt_local_entry) |
a513088d | 2914 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2915 | return ret; |
a73105b8 AQ |
2916 | } |
2917 | ||
335fbe0f ML |
2918 | /** |
2919 | * batadv_handle_tt_response - process incoming tt reply | |
2920 | * @bat_priv: the bat priv with all the soft interface information | |
2921 | * @tt_data: tt data containing the tt request information | |
2922 | * @resp_src: mac address of tt reply sender | |
2923 | * @num_entries: number of tt change entries appended to the tt data | |
2924 | */ | |
2925 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2926 | struct batadv_tvlv_tt_data *tt_data, | |
2927 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2928 | { |
56303d34 SE |
2929 | struct batadv_tt_req_node *node, *safe; |
2930 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2931 | struct batadv_tvlv_tt_change *tt_change; |
7ea7b4a1 AQ |
2932 | uint8_t *tvlv_ptr = (uint8_t *)tt_data; |
2933 | uint16_t change_offset; | |
a73105b8 | 2934 | |
39c75a51 | 2935 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2936 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 2937 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 2938 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2939 | |
335fbe0f | 2940 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2941 | if (!orig_node) |
2942 | goto out; | |
2943 | ||
a70a9aa9 AQ |
2944 | spin_lock_bh(&orig_node->tt_lock); |
2945 | ||
7ea7b4a1 AQ |
2946 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2947 | change_offset *= ntohs(tt_data->num_vlan); | |
2948 | change_offset += sizeof(*tt_data); | |
2949 | tvlv_ptr += change_offset; | |
2950 | ||
2951 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2952 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2953 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2954 | resp_src, num_entries); | |
96412690 | 2955 | } else { |
335fbe0f ML |
2956 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2957 | tt_data->ttvn, tt_change); | |
96412690 | 2958 | } |
a73105b8 | 2959 | |
a70a9aa9 | 2960 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2961 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2962 | |
2963 | spin_unlock_bh(&orig_node->tt_lock); | |
2964 | ||
a73105b8 | 2965 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2966 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2967 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2968 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2969 | continue; |
2970 | list_del(&node->list); | |
2971 | kfree(node); | |
2972 | } | |
7ea7b4a1 | 2973 | |
807736f6 | 2974 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2975 | out: |
2976 | if (orig_node) | |
7d211efc | 2977 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2978 | } |
2979 | ||
56303d34 | 2980 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2981 | { |
56303d34 | 2982 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2983 | |
807736f6 | 2984 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2985 | |
807736f6 | 2986 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2987 | list_del(&node->list); |
2988 | kfree(node); | |
2989 | } | |
2990 | ||
807736f6 | 2991 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2992 | } |
2993 | ||
56303d34 | 2994 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2995 | { |
56303d34 | 2996 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2997 | |
807736f6 SE |
2998 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2999 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3000 | if (!batadv_has_timed_out(node->first_time, |
3001 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3002 | continue; |
3003 | ||
3004 | list_del(&node->list); | |
3005 | kfree(node); | |
3006 | } | |
807736f6 | 3007 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3008 | } |
3009 | ||
3010 | /* This function checks whether the client already reached the | |
3011 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
3012 | * will not be sent. | |
3013 | * | |
9cfc7bd6 SE |
3014 | * returns true if the ROAMING_ADV can be sent, false otherwise |
3015 | */ | |
56303d34 | 3016 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 3017 | uint8_t *client) |
cc47f66e | 3018 | { |
56303d34 | 3019 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3020 | bool ret = false; |
3021 | ||
807736f6 | 3022 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3023 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3024 | * reply from the same orig_node yet |
3025 | */ | |
807736f6 | 3026 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3027 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3028 | continue; |
3029 | ||
1eda58bf | 3030 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3031 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3032 | continue; |
3033 | ||
3e34819e | 3034 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3035 | /* Sorry, you roamed too many times! */ |
3036 | goto unlock; | |
3037 | ret = true; | |
3038 | break; | |
3039 | } | |
3040 | ||
3041 | if (!ret) { | |
3042 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
3043 | if (!tt_roam_node) | |
3044 | goto unlock; | |
3045 | ||
3046 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3047 | atomic_set(&tt_roam_node->counter, |
3048 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3049 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3050 | |
807736f6 | 3051 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3052 | ret = true; |
3053 | } | |
3054 | ||
3055 | unlock: | |
807736f6 | 3056 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3057 | return ret; |
3058 | } | |
3059 | ||
c018ad3d AQ |
3060 | /** |
3061 | * batadv_send_roam_adv - send a roaming advertisement message | |
3062 | * @bat_priv: the bat priv with all the soft interface information | |
3063 | * @client: mac address of the roaming client | |
3064 | * @vid: VLAN identifier | |
3065 | * @orig_node: message destination | |
3066 | * | |
3067 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3068 | * client. This is done to inform the node that from now on all traffic destined | |
3069 | * for this particular roamed client has to be forwarded to the sender of the | |
3070 | * roaming message. | |
3071 | */ | |
56303d34 | 3072 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 3073 | unsigned short vid, |
56303d34 | 3074 | struct batadv_orig_node *orig_node) |
cc47f66e | 3075 | { |
56303d34 | 3076 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3077 | struct batadv_tvlv_roam_adv tvlv_roam; |
3078 | ||
3079 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3080 | if (!primary_if) | |
3081 | goto out; | |
cc47f66e AQ |
3082 | |
3083 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3084 | * already roamed to us too many times |
3085 | */ | |
a513088d | 3086 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3087 | goto out; |
3088 | ||
39c75a51 | 3089 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3090 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3091 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3092 | |
d69909d2 | 3093 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3094 | |
122edaa0 | 3095 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3096 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3097 | |
3098 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3099 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3100 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3101 | |
3102 | out: | |
122edaa0 ML |
3103 | if (primary_if) |
3104 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
3105 | } |
3106 | ||
a513088d | 3107 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3108 | { |
56303d34 | 3109 | struct delayed_work *delayed_work; |
807736f6 | 3110 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3111 | struct batadv_priv *bat_priv; |
3112 | ||
3113 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3114 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3115 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3116 | |
a19d3d85 | 3117 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3118 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3119 | batadv_tt_req_purge(bat_priv); |
3120 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3121 | |
72414442 AQ |
3122 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3123 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3124 | } |
cc47f66e | 3125 | |
56303d34 | 3126 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3127 | { |
e1bf0c14 ML |
3128 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3129 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3130 | ||
807736f6 | 3131 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3132 | |
a513088d SE |
3133 | batadv_tt_local_table_free(bat_priv); |
3134 | batadv_tt_global_table_free(bat_priv); | |
3135 | batadv_tt_req_list_free(bat_priv); | |
3136 | batadv_tt_changes_list_free(bat_priv); | |
3137 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3138 | |
807736f6 | 3139 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3140 | } |
058d0e26 | 3141 | |
7ea7b4a1 AQ |
3142 | /** |
3143 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3144 | * table and possibly count them in the TT size | |
3145 | * @bat_priv: the bat priv with all the soft interface information | |
3146 | * @flags: the flag to switch | |
3147 | * @enable: whether to set or unset the flag | |
3148 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3149 | */ |
7ea7b4a1 AQ |
3150 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, |
3151 | uint16_t flags, bool enable, bool count) | |
058d0e26 | 3152 | { |
7ea7b4a1 AQ |
3153 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3154 | struct batadv_tt_common_entry *tt_common_entry; | |
697f2531 | 3155 | uint16_t changed_num = 0; |
058d0e26 | 3156 | struct hlist_head *head; |
7ea7b4a1 | 3157 | uint32_t i; |
058d0e26 AQ |
3158 | |
3159 | if (!hash) | |
7ea7b4a1 | 3160 | return; |
058d0e26 AQ |
3161 | |
3162 | for (i = 0; i < hash->size; i++) { | |
3163 | head = &hash->table[i]; | |
3164 | ||
3165 | rcu_read_lock(); | |
b67bfe0d | 3166 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3167 | head, hash_entry) { |
697f2531 AQ |
3168 | if (enable) { |
3169 | if ((tt_common_entry->flags & flags) == flags) | |
3170 | continue; | |
3171 | tt_common_entry->flags |= flags; | |
3172 | } else { | |
3173 | if (!(tt_common_entry->flags & flags)) | |
3174 | continue; | |
3175 | tt_common_entry->flags &= ~flags; | |
3176 | } | |
3177 | changed_num++; | |
7ea7b4a1 AQ |
3178 | |
3179 | if (!count) | |
3180 | continue; | |
3181 | ||
3182 | batadv_tt_local_size_inc(bat_priv, | |
3183 | tt_common_entry->vid); | |
058d0e26 AQ |
3184 | } |
3185 | rcu_read_unlock(); | |
3186 | } | |
058d0e26 AQ |
3187 | } |
3188 | ||
acd34afa | 3189 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3190 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3191 | { |
807736f6 | 3192 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3193 | struct batadv_tt_common_entry *tt_common; |
3194 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 3195 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 3196 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3197 | struct hlist_head *head; |
3198 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 3199 | uint32_t i; |
058d0e26 AQ |
3200 | |
3201 | if (!hash) | |
3202 | return; | |
3203 | ||
3204 | for (i = 0; i < hash->size; i++) { | |
3205 | head = &hash->table[i]; | |
3206 | list_lock = &hash->list_locks[i]; | |
3207 | ||
3208 | spin_lock_bh(list_lock); | |
b67bfe0d | 3209 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3210 | hash_entry) { |
3211 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3212 | continue; |
3213 | ||
39c75a51 | 3214 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3215 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3216 | tt_common->addr, | |
3217 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3218 | |
7ea7b4a1 | 3219 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3220 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3221 | tt_local = container_of(tt_common, |
3222 | struct batadv_tt_local_entry, | |
3223 | common); | |
35df3b29 AQ |
3224 | |
3225 | /* decrease the reference held for this vlan */ | |
3226 | vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid); | |
354136bc ML |
3227 | if (vlan) { |
3228 | batadv_softif_vlan_free_ref(vlan); | |
3229 | batadv_softif_vlan_free_ref(vlan); | |
3230 | } | |
35df3b29 | 3231 | |
56303d34 | 3232 | batadv_tt_local_entry_free_ref(tt_local); |
058d0e26 AQ |
3233 | } |
3234 | spin_unlock_bh(list_lock); | |
3235 | } | |
058d0e26 AQ |
3236 | } |
3237 | ||
e1bf0c14 | 3238 | /** |
a19d3d85 ML |
3239 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3240 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3241 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3242 | * |
3243 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3244 | */ |
a19d3d85 | 3245 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3246 | { |
c5caf4ef LL |
3247 | /* Update multicast addresses in local translation table */ |
3248 | batadv_mcast_mla_update(bat_priv); | |
3249 | ||
e1bf0c14 ML |
3250 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3251 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3252 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3253 | return; |
e1bf0c14 | 3254 | } |
be9aa4c1 | 3255 | |
7ea7b4a1 | 3256 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3257 | |
a513088d | 3258 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3259 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3260 | |
3261 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3262 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3263 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3264 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 3265 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3266 | |
3267 | /* reset the sending counter */ | |
807736f6 | 3268 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3269 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3270 | } |
a70a9aa9 | 3271 | |
a19d3d85 ML |
3272 | /** |
3273 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3274 | * have been queued in the time since the last commit | |
3275 | * @bat_priv: the bat priv with all the soft interface information | |
3276 | */ | |
3277 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3278 | { | |
3279 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3280 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3281 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3282 | } |
59b699cd | 3283 | |
56303d34 | 3284 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 3285 | uint8_t *dst, unsigned short vid) |
59b699cd | 3286 | { |
56303d34 SE |
3287 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3288 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3289 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3290 | bool ret = false; |
59b699cd | 3291 | |
b8cbd81d AQ |
3292 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3293 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3294 | goto out; |
59b699cd | 3295 | |
b8cbd81d | 3296 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3297 | if (!tt_local_entry) |
3298 | goto out; | |
3299 | ||
b8cbd81d | 3300 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3301 | if (!tt_global_entry) |
3302 | goto out; | |
3303 | ||
1f129fef | 3304 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3305 | goto out; |
3306 | ||
5870adc6 | 3307 | ret = true; |
59b699cd AQ |
3308 | |
3309 | out: | |
b8cbd81d AQ |
3310 | if (vlan) |
3311 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3312 | if (tt_global_entry) |
a513088d | 3313 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3314 | if (tt_local_entry) |
a513088d | 3315 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3316 | return ret; |
3317 | } | |
a943cac1 | 3318 | |
e1bf0c14 ML |
3319 | /** |
3320 | * batadv_tt_update_orig - update global translation table with new tt | |
3321 | * information received via ogms | |
3322 | * @bat_priv: the bat priv with all the soft interface information | |
3323 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3324 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3325 | * @tt_num_vlan: number of tvlv VLAN entries | |
3326 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3327 | * @tt_num_changes: number of tt changes inside the tt buffer |
3328 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3329 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3330 | */ |
3331 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3332 | struct batadv_orig_node *orig_node, | |
7ea7b4a1 AQ |
3333 | const void *tt_buff, uint16_t tt_num_vlan, |
3334 | struct batadv_tvlv_tt_change *tt_change, | |
3335 | uint16_t tt_num_changes, uint8_t ttvn) | |
a943cac1 ML |
3336 | { |
3337 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
7ea7b4a1 | 3338 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3339 | bool full_table = true; |
e17931d1 | 3340 | bool has_tt_init; |
a943cac1 | 3341 | |
7ea7b4a1 | 3342 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
e17931d1 LL |
3343 | has_tt_init = orig_node->capa_initialized & BATADV_ORIG_CAPA_HAS_TT; |
3344 | ||
17071578 | 3345 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3346 | * increased by one -> we can apply the attached changes |
3347 | */ | |
e17931d1 | 3348 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3349 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3350 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3351 | * times. | |
9cfc7bd6 SE |
3352 | * In this case send a tt request |
3353 | */ | |
a943cac1 ML |
3354 | if (!tt_num_changes) { |
3355 | full_table = false; | |
3356 | goto request_table; | |
3357 | } | |
3358 | ||
a70a9aa9 AQ |
3359 | spin_lock_bh(&orig_node->tt_lock); |
3360 | ||
a513088d | 3361 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3362 | ttvn, tt_change); |
a943cac1 ML |
3363 | |
3364 | /* Even if we received the precomputed crc with the OGM, we | |
3365 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3366 | * in the global table |
3367 | */ | |
7ea7b4a1 | 3368 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3369 | |
a70a9aa9 AQ |
3370 | spin_unlock_bh(&orig_node->tt_lock); |
3371 | ||
a943cac1 ML |
3372 | /* The ttvn alone is not enough to guarantee consistency |
3373 | * because a single value could represent different states | |
3374 | * (due to the wrap around). Thus a node has to check whether | |
3375 | * the resulting table (after applying the changes) is still | |
3376 | * consistent or not. E.g. a node could disconnect while its | |
3377 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3378 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3379 | * inconsistency |
3380 | */ | |
7ea7b4a1 AQ |
3381 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3382 | tt_num_vlan)) | |
a943cac1 | 3383 | goto request_table; |
a943cac1 ML |
3384 | } else { |
3385 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3386 | * in sync anymore -> request fresh tt data |
3387 | */ | |
e17931d1 | 3388 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3389 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3390 | tt_num_vlan)) { | |
a943cac1 | 3391 | request_table: |
39c75a51 | 3392 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3393 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3394 | orig_node->orig, ttvn, orig_ttvn, | |
3395 | tt_num_changes); | |
a513088d | 3396 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3397 | tt_vlan, tt_num_vlan, |
3398 | full_table); | |
a943cac1 ML |
3399 | return; |
3400 | } | |
3401 | } | |
3402 | } | |
3275e7cc | 3403 | |
c018ad3d AQ |
3404 | /** |
3405 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3406 | * @bat_priv: the bat priv with all the soft interface information | |
3407 | * @addr: the mac address of the client to check | |
3408 | * @vid: VLAN identifier | |
3409 | * | |
3410 | * Returns true if we know that the client has moved from its old originator | |
3411 | * to another one. This entry is still kept for consistency purposes and will be | |
3412 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3413 | */ |
56303d34 | 3414 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 3415 | uint8_t *addr, unsigned short vid) |
3275e7cc | 3416 | { |
56303d34 | 3417 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3418 | bool ret = false; |
3419 | ||
c018ad3d | 3420 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3421 | if (!tt_global_entry) |
3422 | goto out; | |
3423 | ||
c1d07431 | 3424 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3425 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3426 | out: |
3427 | return ret; | |
3428 | } | |
30cfd02b | 3429 | |
7c1fd91d AQ |
3430 | /** |
3431 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3432 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3433 | * @addr: the mac address of the local client to query |
3434 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3435 | * |
3436 | * Returns true if the local client is known to be roaming (it is not served by | |
3437 | * this node anymore) or not. If yes, the client is still present in the table | |
3438 | * to keep the latter consistent with the node TTVN | |
3439 | */ | |
3440 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 3441 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
3442 | { |
3443 | struct batadv_tt_local_entry *tt_local_entry; | |
3444 | bool ret = false; | |
3445 | ||
c018ad3d | 3446 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3447 | if (!tt_local_entry) |
3448 | goto out; | |
3449 | ||
3450 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3451 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3452 | out: | |
3453 | return ret; | |
7c1fd91d AQ |
3454 | } |
3455 | ||
30cfd02b AQ |
3456 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3457 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3458 | const unsigned char *addr, |
16052789 | 3459 | unsigned short vid) |
30cfd02b AQ |
3460 | { |
3461 | bool ret = false; | |
3462 | ||
16052789 | 3463 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3464 | BATADV_TT_CLIENT_TEMP, |
3465 | atomic_read(&orig_node->last_ttvn))) | |
3466 | goto out; | |
3467 | ||
3468 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3469 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3470 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3471 | ret = true; |
3472 | out: | |
3473 | return ret; | |
3474 | } | |
e1bf0c14 | 3475 | |
a19d3d85 ML |
3476 | /** |
3477 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3478 | * maximum packet size that can be transported through the mesh | |
3479 | * @soft_iface: netdev struct of the mesh interface | |
3480 | * | |
3481 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3482 | * to be removed. | |
3483 | */ | |
3484 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3485 | { | |
3486 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3487 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3488 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3489 | bool reduced = false; | |
3490 | ||
3491 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3492 | ||
3493 | while (true) { | |
3494 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3495 | if (packet_size_max >= table_size) | |
3496 | break; | |
3497 | ||
3498 | batadv_tt_local_purge(bat_priv, timeout); | |
3499 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3500 | ||
3501 | timeout /= 2; | |
3502 | reduced = true; | |
3503 | net_ratelimited_function(batadv_info, soft_iface, | |
3504 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3505 | packet_size_max); | |
3506 | } | |
3507 | ||
3508 | /* commit these changes immediately, to avoid synchronization problem | |
3509 | * with the TTVN | |
3510 | */ | |
3511 | if (reduced) | |
3512 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3513 | ||
3514 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3515 | } | |
3516 | ||
e1bf0c14 ML |
3517 | /** |
3518 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3519 | * @bat_priv: the bat priv with all the soft interface information | |
3520 | * @orig: the orig_node of the ogm | |
3521 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3522 | * @tvlv_value: tvlv buffer containing the gateway data | |
3523 | * @tvlv_value_len: tvlv buffer length | |
3524 | */ | |
3525 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3526 | struct batadv_orig_node *orig, | |
7ea7b4a1 | 3527 | uint8_t flags, void *tvlv_value, |
e1bf0c14 ML |
3528 | uint16_t tvlv_value_len) |
3529 | { | |
7ea7b4a1 AQ |
3530 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3531 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3532 | struct batadv_tvlv_tt_data *tt_data; |
7ea7b4a1 | 3533 | uint16_t num_entries, num_vlan; |
e1bf0c14 ML |
3534 | |
3535 | if (tvlv_value_len < sizeof(*tt_data)) | |
3536 | return; | |
3537 | ||
3538 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3539 | tvlv_value_len -= sizeof(*tt_data); | |
3540 | ||
7ea7b4a1 AQ |
3541 | num_vlan = ntohs(tt_data->num_vlan); |
3542 | ||
3543 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3544 | return; | |
3545 | ||
3546 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3547 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3548 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3549 | ||
298e6e68 | 3550 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3551 | |
7ea7b4a1 AQ |
3552 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3553 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3554 | } |
3555 | ||
335fbe0f ML |
3556 | /** |
3557 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3558 | * container | |
3559 | * @bat_priv: the bat priv with all the soft interface information | |
3560 | * @src: mac address of tt tvlv sender | |
3561 | * @dst: mac address of tt tvlv recipient | |
3562 | * @tvlv_value: tvlv buffer containing the tt data | |
3563 | * @tvlv_value_len: tvlv buffer length | |
3564 | * | |
3565 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3566 | * otherwise. | |
3567 | */ | |
3568 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3569 | uint8_t *src, uint8_t *dst, | |
3570 | void *tvlv_value, | |
3571 | uint16_t tvlv_value_len) | |
3572 | { | |
3573 | struct batadv_tvlv_tt_data *tt_data; | |
7ea7b4a1 | 3574 | uint16_t tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3575 | char tt_flag; |
3576 | bool ret; | |
3577 | ||
3578 | if (tvlv_value_len < sizeof(*tt_data)) | |
3579 | return NET_RX_SUCCESS; | |
3580 | ||
3581 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3582 | tvlv_value_len -= sizeof(*tt_data); | |
3583 | ||
7ea7b4a1 AQ |
3584 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3585 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3586 | ||
3587 | if (tvlv_value_len < tt_vlan_len) | |
3588 | return NET_RX_SUCCESS; | |
3589 | ||
3590 | tvlv_value_len -= tt_vlan_len; | |
3591 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3592 | |
3593 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3594 | case BATADV_TT_REQUEST: | |
3595 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3596 | ||
3597 | /* If this node cannot provide a TT response the tt_request is | |
3598 | * forwarded | |
3599 | */ | |
3600 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3601 | if (!ret) { | |
3602 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3603 | tt_flag = 'F'; | |
3604 | else | |
3605 | tt_flag = '.'; | |
3606 | ||
3607 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3608 | "Routing TT_REQUEST to %pM [%c]\n", | |
3609 | dst, tt_flag); | |
3610 | /* tvlv API will re-route the packet */ | |
3611 | return NET_RX_DROP; | |
3612 | } | |
3613 | break; | |
3614 | case BATADV_TT_RESPONSE: | |
3615 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3616 | ||
3617 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3618 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3619 | src, tt_num_entries); |
335fbe0f ML |
3620 | return NET_RX_SUCCESS; |
3621 | } | |
3622 | ||
3623 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3624 | tt_flag = 'F'; | |
3625 | else | |
3626 | tt_flag = '.'; | |
3627 | ||
3628 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3629 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3630 | ||
3631 | /* tvlv API will re-route the packet */ | |
3632 | return NET_RX_DROP; | |
3633 | } | |
3634 | ||
3635 | return NET_RX_SUCCESS; | |
3636 | } | |
3637 | ||
122edaa0 ML |
3638 | /** |
3639 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3640 | * @bat_priv: the bat priv with all the soft interface information | |
3641 | * @src: mac address of tt tvlv sender | |
3642 | * @dst: mac address of tt tvlv recipient | |
3643 | * @tvlv_value: tvlv buffer containing the tt data | |
3644 | * @tvlv_value_len: tvlv buffer length | |
3645 | * | |
3646 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3647 | * otherwise. | |
3648 | */ | |
3649 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3650 | uint8_t *src, uint8_t *dst, | |
3651 | void *tvlv_value, | |
3652 | uint16_t tvlv_value_len) | |
3653 | { | |
3654 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3655 | struct batadv_orig_node *orig_node = NULL; | |
3656 | ||
3657 | /* If this node is not the intended recipient of the | |
3658 | * roaming advertisement the packet is forwarded | |
3659 | * (the tvlv API will re-route the packet). | |
3660 | */ | |
3661 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3662 | return NET_RX_DROP; | |
3663 | ||
122edaa0 ML |
3664 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3665 | goto out; | |
3666 | ||
3667 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3668 | if (!orig_node) | |
3669 | goto out; | |
3670 | ||
3671 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3672 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3673 | ||
3674 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3675 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3676 | src, roaming_adv->client); | |
3677 | ||
3678 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3679 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3680 | atomic_read(&orig_node->last_ttvn) + 1); |
3681 | ||
3682 | out: | |
3683 | if (orig_node) | |
3684 | batadv_orig_node_free_ref(orig_node); | |
3685 | return NET_RX_SUCCESS; | |
3686 | } | |
3687 | ||
e1bf0c14 ML |
3688 | /** |
3689 | * batadv_tt_init - initialise the translation table internals | |
3690 | * @bat_priv: the bat priv with all the soft interface information | |
3691 | * | |
3692 | * Return 0 on success or negative error number in case of failure. | |
3693 | */ | |
3694 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3695 | { | |
3696 | int ret; | |
3697 | ||
0eb01568 AQ |
3698 | /* synchronized flags must be remote */ |
3699 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3700 | ||
e1bf0c14 ML |
3701 | ret = batadv_tt_local_init(bat_priv); |
3702 | if (ret < 0) | |
3703 | return ret; | |
3704 | ||
3705 | ret = batadv_tt_global_init(bat_priv); | |
3706 | if (ret < 0) | |
3707 | return ret; | |
3708 | ||
3709 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3710 | batadv_tt_tvlv_unicast_handler_v1, |
3711 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3712 | |
122edaa0 ML |
3713 | batadv_tvlv_handler_register(bat_priv, NULL, |
3714 | batadv_roam_tvlv_unicast_handler_v1, | |
3715 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3716 | ||
e1bf0c14 ML |
3717 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3718 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3719 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3720 | ||
3721 | return 1; | |
3722 | } | |
42cb0bef AQ |
3723 | |
3724 | /** | |
3725 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3726 | * @bat_priv: the bat priv with all the soft interface information | |
3727 | * @addr: the mac address of the client | |
3728 | * @vid: the identifier of the VLAN where this client is connected | |
3729 | * | |
3730 | * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false | |
3731 | * otherwise | |
3732 | */ | |
3733 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
3734 | const uint8_t *addr, unsigned short vid) | |
3735 | { | |
3736 | struct batadv_tt_global_entry *tt; | |
3737 | bool ret; | |
3738 | ||
3739 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3740 | if (!tt) | |
3741 | return false; | |
3742 | ||
3743 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3744 | ||
3745 | batadv_tt_global_entry_free_ref(tt); | |
3746 | ||
3747 | return ret; | |
3748 | } |