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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> | |
ac4eebd4 | 22 | #include <linux/bitops.h> |
1e2c2a4f SE |
23 | #include <linux/bug.h> |
24 | #include <linux/byteorder/generic.h> | |
25 | #include <linux/compiler.h> | |
26 | #include <linux/crc32c.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/jhash.h> | |
32 | #include <linux/jiffies.h> | |
33 | #include <linux/kernel.h> | |
34 | #include <linux/list.h> | |
35 | #include <linux/lockdep.h> | |
36 | #include <linux/netdevice.h> | |
37 | #include <linux/rculist.h> | |
38 | #include <linux/rcupdate.h> | |
39 | #include <linux/seq_file.h> | |
40 | #include <linux/slab.h> | |
41 | #include <linux/spinlock.h> | |
42 | #include <linux/stddef.h> | |
43 | #include <linux/string.h> | |
44 | #include <linux/workqueue.h> | |
45 | #include <net/net_namespace.h> | |
46 | ||
47 | #include "bridge_loop_avoidance.h" | |
32ae9b22 | 48 | #include "hard-interface.h" |
c6c8fea2 | 49 | #include "hash.h" |
c5caf4ef | 50 | #include "multicast.h" |
1e2c2a4f SE |
51 | #include "originator.h" |
52 | #include "packet.h" | |
53 | #include "soft-interface.h" | |
a73105b8 | 54 | |
dec05074 AQ |
55 | /* hash class keys */ |
56 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
57 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
58 | ||
6b5e971a | 59 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 60 | unsigned short vid, |
56303d34 | 61 | struct batadv_orig_node *orig_node); |
a513088d SE |
62 | static void batadv_tt_purge(struct work_struct *work); |
63 | static void | |
56303d34 | 64 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
65 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
66 | struct batadv_orig_node *orig_node, | |
67 | const unsigned char *addr, | |
c018ad3d AQ |
68 | unsigned short vid, const char *message, |
69 | bool roaming); | |
c6c8fea2 | 70 | |
7aadf889 | 71 | /* returns 1 if they are the same mac addr */ |
a513088d | 72 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 73 | { |
56303d34 | 74 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 75 | hash_entry); |
7aadf889 | 76 | |
323813ed | 77 | return batadv_compare_eth(data1, data2); |
7aadf889 ML |
78 | } |
79 | ||
c018ad3d AQ |
80 | /** |
81 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
82 | * @data: pointer to the tt_common_entry object to map | |
83 | * @size: the size of the hash table | |
84 | * | |
85 | * Returns the hash index where the object represented by 'data' should be | |
86 | * stored at. | |
87 | */ | |
6b5e971a | 88 | static inline u32 batadv_choose_tt(const void *data, u32 size) |
c018ad3d AQ |
89 | { |
90 | struct batadv_tt_common_entry *tt; | |
6b5e971a | 91 | u32 hash = 0; |
c018ad3d AQ |
92 | |
93 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
94 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
95 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
96 | |
97 | return hash % size; | |
98 | } | |
99 | ||
100 | /** | |
101 | * batadv_tt_hash_find - look for a client in the given hash table | |
102 | * @hash: the hash table to search | |
103 | * @addr: the mac address of the client to look for | |
104 | * @vid: VLAN identifier | |
105 | * | |
106 | * Returns a pointer to the tt_common struct belonging to the searched client if | |
107 | * found, NULL otherwise. | |
108 | */ | |
56303d34 | 109 | static struct batadv_tt_common_entry * |
6b5e971a | 110 | batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr, |
c018ad3d | 111 | unsigned short vid) |
7aadf889 | 112 | { |
7aadf889 | 113 | struct hlist_head *head; |
c018ad3d | 114 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
6b5e971a | 115 | u32 index; |
7aadf889 ML |
116 | |
117 | if (!hash) | |
118 | return NULL; | |
119 | ||
8fdd0153 | 120 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
121 | to_search.vid = vid; |
122 | ||
123 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
124 | head = &hash->table[index]; |
125 | ||
126 | rcu_read_lock(); | |
c018ad3d AQ |
127 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
128 | if (!batadv_compare_eth(tt, addr)) | |
129 | continue; | |
130 | ||
131 | if (tt->vid != vid) | |
7aadf889 ML |
132 | continue; |
133 | ||
c018ad3d | 134 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
135 | continue; |
136 | ||
c018ad3d | 137 | tt_tmp = tt; |
7aadf889 ML |
138 | break; |
139 | } | |
140 | rcu_read_unlock(); | |
141 | ||
c018ad3d | 142 | return tt_tmp; |
7aadf889 ML |
143 | } |
144 | ||
c018ad3d AQ |
145 | /** |
146 | * batadv_tt_local_hash_find - search the local table for a given client | |
147 | * @bat_priv: the bat priv with all the soft interface information | |
148 | * @addr: the mac address of the client to look for | |
149 | * @vid: VLAN identifier | |
150 | * | |
151 | * Returns a pointer to the corresponding tt_local_entry struct if the client is | |
152 | * found, NULL otherwise. | |
153 | */ | |
56303d34 | 154 | static struct batadv_tt_local_entry * |
6b5e971a | 155 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 156 | unsigned short vid) |
7aadf889 | 157 | { |
56303d34 SE |
158 | struct batadv_tt_common_entry *tt_common_entry; |
159 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 160 | |
c018ad3d AQ |
161 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
162 | vid); | |
48100bac AQ |
163 | if (tt_common_entry) |
164 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
165 | struct batadv_tt_local_entry, |
166 | common); | |
48100bac AQ |
167 | return tt_local_entry; |
168 | } | |
7aadf889 | 169 | |
c018ad3d AQ |
170 | /** |
171 | * batadv_tt_global_hash_find - search the global table for a given client | |
172 | * @bat_priv: the bat priv with all the soft interface information | |
173 | * @addr: the mac address of the client to look for | |
174 | * @vid: VLAN identifier | |
175 | * | |
176 | * Returns a pointer to the corresponding tt_global_entry struct if the client | |
177 | * is found, NULL otherwise. | |
178 | */ | |
56303d34 | 179 | static struct batadv_tt_global_entry * |
6b5e971a | 180 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 181 | unsigned short vid) |
48100bac | 182 | { |
56303d34 SE |
183 | struct batadv_tt_common_entry *tt_common_entry; |
184 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 185 | |
c018ad3d AQ |
186 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
187 | vid); | |
48100bac AQ |
188 | if (tt_common_entry) |
189 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
190 | struct batadv_tt_global_entry, |
191 | common); | |
48100bac | 192 | return tt_global_entry; |
7aadf889 ML |
193 | } |
194 | ||
a513088d | 195 | static void |
56303d34 | 196 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 197 | { |
48100bac AQ |
198 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
199 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
200 | } |
201 | ||
21026059 AQ |
202 | /** |
203 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
204 | * tt_global_entry and possibly free it | |
205 | * @tt_global_entry: the object to free | |
206 | */ | |
a513088d | 207 | static void |
56303d34 | 208 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 209 | { |
db08e6e5 | 210 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 211 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 212 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
213 | } |
214 | } | |
215 | ||
1d8ab8d3 LL |
216 | /** |
217 | * batadv_tt_global_hash_count - count the number of orig entries | |
218 | * @hash: hash table containing the tt entries | |
219 | * @addr: the mac address of the client to count entries for | |
220 | * @vid: VLAN identifier | |
221 | * | |
222 | * Return the number of originators advertising the given address/data | |
223 | * (excluding ourself). | |
224 | */ | |
225 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 226 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
227 | { |
228 | struct batadv_tt_global_entry *tt_global_entry; | |
229 | int count; | |
230 | ||
231 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
232 | if (!tt_global_entry) | |
233 | return 0; | |
234 | ||
235 | count = atomic_read(&tt_global_entry->orig_list_count); | |
236 | batadv_tt_global_entry_free_ref(tt_global_entry); | |
237 | ||
238 | return count; | |
239 | } | |
240 | ||
a513088d | 241 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 242 | { |
56303d34 | 243 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 244 | |
56303d34 | 245 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
246 | |
247 | /* We are in an rcu callback here, therefore we cannot use | |
248 | * batadv_orig_node_free_ref() and its call_rcu(): | |
249 | * An rcu_barrier() wouldn't wait for that to finish | |
250 | */ | |
251 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
252 | kfree(orig_entry); |
253 | } | |
254 | ||
7ea7b4a1 AQ |
255 | /** |
256 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
257 | * by vid | |
258 | * @bat_priv: the bat priv with all the soft interface information | |
259 | * @vid: the VLAN identifier of the sub-table to change | |
260 | * @v: the amount to sum to the local table size | |
261 | */ | |
262 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
263 | unsigned short vid, int v) | |
264 | { | |
265 | struct batadv_softif_vlan *vlan; | |
266 | ||
267 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
268 | if (!vlan) | |
269 | return; | |
270 | ||
271 | atomic_add(v, &vlan->tt.num_entries); | |
272 | ||
273 | batadv_softif_vlan_free_ref(vlan); | |
274 | } | |
275 | ||
276 | /** | |
277 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
278 | * vid | |
279 | * @bat_priv: the bat priv with all the soft interface information | |
280 | * @vid: the VLAN identifier | |
281 | */ | |
282 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
283 | unsigned short vid) | |
284 | { | |
285 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
286 | } | |
287 | ||
288 | /** | |
289 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
290 | * vid | |
291 | * @bat_priv: the bat priv with all the soft interface information | |
292 | * @vid: the VLAN identifier | |
293 | */ | |
294 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
295 | unsigned short vid) | |
296 | { | |
297 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
298 | } | |
299 | ||
300 | /** | |
301 | * batadv_tt_global_size_mod - change the size by v of the local table | |
302 | * identified by vid | |
303 | * @bat_priv: the bat priv with all the soft interface information | |
304 | * @vid: the VLAN identifier | |
305 | * @v: the amount to sum to the global table size | |
306 | */ | |
307 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
308 | unsigned short vid, int v) | |
309 | { | |
310 | struct batadv_orig_node_vlan *vlan; | |
311 | ||
312 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
313 | if (!vlan) | |
314 | return; | |
315 | ||
316 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
317 | spin_lock_bh(&orig_node->vlan_list_lock); | |
a121048a | 318 | hlist_del_init_rcu(&vlan->list); |
7ea7b4a1 AQ |
319 | spin_unlock_bh(&orig_node->vlan_list_lock); |
320 | batadv_orig_node_vlan_free_ref(vlan); | |
321 | } | |
322 | ||
323 | batadv_orig_node_vlan_free_ref(vlan); | |
324 | } | |
325 | ||
326 | /** | |
327 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
328 | * given vid | |
329 | * @orig_node: the originator which global table size has to be decreased | |
330 | * @vid: the vlan identifier | |
331 | */ | |
332 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
333 | unsigned short vid) | |
334 | { | |
335 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
336 | } | |
337 | ||
338 | /** | |
339 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
340 | * given vid | |
341 | * @orig_node: the originator which global table size has to be decreased | |
342 | * @vid: the vlan identifier | |
343 | */ | |
344 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
345 | unsigned short vid) | |
346 | { | |
347 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
348 | } | |
349 | ||
a513088d | 350 | static void |
56303d34 | 351 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 352 | { |
d657e621 AQ |
353 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
354 | return; | |
7ea7b4a1 | 355 | |
a513088d | 356 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
357 | } |
358 | ||
3abe4adb AQ |
359 | /** |
360 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
361 | * @bat_priv: the bat priv with all the soft interface information | |
362 | * @tt_local_entry: the TT entry involved in the event | |
363 | * @event_flags: flags to store in the event structure | |
364 | */ | |
56303d34 | 365 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 366 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 367 | u8 event_flags) |
a73105b8 | 368 | { |
56303d34 | 369 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 370 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 371 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
372 | bool event_removed = false; |
373 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
374 | |
375 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
376 | if (!tt_change_node) |
377 | return; | |
378 | ||
ff66c975 | 379 | tt_change_node->change.flags = flags; |
ca663046 AQ |
380 | memset(tt_change_node->change.reserved, 0, |
381 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 382 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 383 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 384 | |
acd34afa | 385 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
386 | |
387 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
388 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
389 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 390 | list) { |
3abe4adb | 391 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
392 | continue; |
393 | ||
394 | /* DEL+ADD in the same orig interval have no effect and can be | |
395 | * removed to avoid silly behaviour on the receiver side. The | |
396 | * other way around (ADD+DEL) can happen in case of roaming of | |
397 | * a client still in the NEW state. Roaming of NEW clients is | |
398 | * now possible due to automatically recognition of "temporary" | |
399 | * clients | |
400 | */ | |
acd34afa | 401 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
402 | if (!del_op_requested && del_op_entry) |
403 | goto del; | |
404 | if (del_op_requested && !del_op_entry) | |
405 | goto del; | |
3c4f7ab6 AQ |
406 | |
407 | /* this is a second add in the same originator interval. It | |
408 | * means that flags have been changed: update them! | |
409 | */ | |
410 | if (!del_op_requested && !del_op_entry) | |
411 | entry->change.flags = flags; | |
412 | ||
3b643de5 AQ |
413 | continue; |
414 | del: | |
415 | list_del(&entry->list); | |
416 | kfree(entry); | |
155e4e12 | 417 | kfree(tt_change_node); |
3b643de5 AQ |
418 | event_removed = true; |
419 | goto unlock; | |
420 | } | |
421 | ||
a73105b8 | 422 | /* track the change in the OGMinterval list */ |
807736f6 | 423 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
424 | |
425 | unlock: | |
807736f6 | 426 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 427 | |
3b643de5 | 428 | if (event_removed) |
807736f6 | 429 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 430 | else |
807736f6 | 431 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
432 | } |
433 | ||
335fbe0f ML |
434 | /** |
435 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
436 | * @changes_num: number of tt changes | |
437 | * | |
438 | * Returns computed length in bytes. | |
439 | */ | |
440 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 441 | { |
335fbe0f | 442 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
443 | } |
444 | ||
298e6e68 AQ |
445 | /** |
446 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
447 | * @tt_len: available space | |
448 | * | |
449 | * Returns the number of entries. | |
450 | */ | |
6b5e971a | 451 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
452 | { |
453 | return tt_len / batadv_tt_len(1); | |
454 | } | |
455 | ||
a19d3d85 ML |
456 | /** |
457 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
458 | * size when transmitted over the air | |
459 | * @bat_priv: the bat priv with all the soft interface information | |
460 | * | |
461 | * Returns local translation table size in bytes. | |
462 | */ | |
463 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
464 | { | |
4f248cff SE |
465 | u16 num_vlan = 0; |
466 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
467 | struct batadv_softif_vlan *vlan; |
468 | int hdr_size; | |
469 | ||
470 | rcu_read_lock(); | |
471 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
472 | num_vlan++; | |
473 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
474 | } | |
475 | rcu_read_unlock(); | |
476 | ||
477 | /* header size of tvlv encapsulated tt response payload */ | |
478 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
479 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
480 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
481 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
482 | ||
483 | return hdr_size + batadv_tt_len(tt_local_entries); | |
484 | } | |
485 | ||
56303d34 | 486 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 487 | { |
807736f6 | 488 | if (bat_priv->tt.local_hash) |
5346c35e | 489 | return 0; |
c6c8fea2 | 490 | |
807736f6 | 491 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 492 | |
807736f6 | 493 | if (!bat_priv->tt.local_hash) |
5346c35e | 494 | return -ENOMEM; |
c6c8fea2 | 495 | |
dec05074 AQ |
496 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
497 | &batadv_tt_local_hash_lock_class_key); | |
498 | ||
5346c35e | 499 | return 0; |
c6c8fea2 SE |
500 | } |
501 | ||
068ee6e2 AQ |
502 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
503 | struct batadv_tt_global_entry *tt_global, | |
504 | const char *message) | |
505 | { | |
506 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
507 | "Deleting global tt entry %pM (vid: %d): %s\n", |
508 | tt_global->common.addr, | |
509 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
510 | |
511 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 512 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 513 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
514 | } |
515 | ||
c018ad3d AQ |
516 | /** |
517 | * batadv_tt_local_add - add a new client to the local table or update an | |
518 | * existing client | |
519 | * @soft_iface: netdev struct of the mesh interface | |
520 | * @addr: the mac address of the client to add | |
521 | * @vid: VLAN identifier | |
522 | * @ifindex: index of the interface where the client is connected to (useful to | |
523 | * identify wireless clients) | |
9464d071 AQ |
524 | * @mark: the value contained in the skb->mark field of the received packet (if |
525 | * any) | |
a19d3d85 ML |
526 | * |
527 | * Returns true if the client was successfully added, false otherwise. | |
c018ad3d | 528 | */ |
6b5e971a SE |
529 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
530 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 531 | { |
56303d34 | 532 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 533 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 534 | struct batadv_tt_global_entry *tt_global = NULL; |
35df3b29 | 535 | struct batadv_softif_vlan *vlan; |
0c69aecc | 536 | struct net_device *in_dev = NULL; |
db08e6e5 | 537 | struct hlist_head *head; |
56303d34 | 538 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 539 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
540 | bool ret = false; |
541 | bool roamed_back = false; | |
6b5e971a SE |
542 | u8 remote_flags; |
543 | u32 match_mark; | |
c6c8fea2 | 544 | |
0c69aecc AQ |
545 | if (ifindex != BATADV_NULL_IFINDEX) |
546 | in_dev = dev_get_by_index(&init_net, ifindex); | |
547 | ||
c018ad3d | 548 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
549 | |
550 | if (!is_multicast_ether_addr(addr)) | |
551 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 552 | |
47c94655 AQ |
553 | if (tt_local) { |
554 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
555 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
556 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
557 | "Re-adding pending client %pM (vid: %d)\n", |
558 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
559 | /* whatever the reason why the PENDING flag was set, |
560 | * this is a client which was enqueued to be removed in | |
561 | * this orig_interval. Since it popped up again, the | |
562 | * flag can be reset like it was never enqueued | |
563 | */ | |
564 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
565 | goto add_event; | |
566 | } | |
567 | ||
568 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
569 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
570 | "Roaming client %pM (vid: %d) came back to its original location\n", |
571 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
572 | /* the ROAM flag is set because this client roamed away |
573 | * and the node got a roaming_advertisement message. Now | |
574 | * that the client popped up again at its original | |
575 | * location such flag can be unset | |
576 | */ | |
577 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
578 | roamed_back = true; | |
579 | } | |
580 | goto check_roaming; | |
c6c8fea2 SE |
581 | } |
582 | ||
a19d3d85 ML |
583 | /* Ignore the client if we cannot send it in a full table response. */ |
584 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
585 | table_size += batadv_tt_len(1); | |
586 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
587 | if (table_size > packet_size_max) { | |
588 | net_ratelimited_function(batadv_info, soft_iface, | |
589 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
590 | table_size, packet_size_max, addr); | |
591 | goto out; | |
592 | } | |
593 | ||
47c94655 AQ |
594 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
595 | if (!tt_local) | |
7683fdc1 | 596 | goto out; |
a73105b8 | 597 | |
35df3b29 AQ |
598 | /* increase the refcounter of the related vlan */ |
599 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc | 600 | if (WARN(!vlan, "adding TT local entry %pM to non-existent VLAN %d", |
fd7dec25 SE |
601 | addr, BATADV_PRINT_VID(vid))) { |
602 | kfree(tt_local); | |
603 | tt_local = NULL; | |
354136bc | 604 | goto out; |
fd7dec25 | 605 | } |
35df3b29 | 606 | |
39c75a51 | 607 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
608 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
609 | addr, BATADV_PRINT_VID(vid), | |
6b5e971a | 610 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 611 | |
8fdd0153 | 612 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
613 | /* The local entry has to be marked as NEW to avoid to send it in |
614 | * a full table response going out before the next ttvn increment | |
615 | * (consistency check) | |
616 | */ | |
617 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 618 | tt_local->common.vid = vid; |
0c69aecc | 619 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
620 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
621 | atomic_set(&tt_local->common.refcount, 2); | |
622 | tt_local->last_seen = jiffies; | |
623 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 624 | |
c5caf4ef LL |
625 | /* the batman interface mac and multicast addresses should never be |
626 | * purged | |
627 | */ | |
628 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
629 | is_multicast_ether_addr(addr)) | |
47c94655 | 630 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 631 | |
807736f6 | 632 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 633 | batadv_choose_tt, &tt_local->common, |
47c94655 | 634 | &tt_local->common.hash_entry); |
80b3f58c SW |
635 | |
636 | if (unlikely(hash_added != 0)) { | |
637 | /* remove the reference for the hash */ | |
47c94655 | 638 | batadv_tt_local_entry_free_ref(tt_local); |
35df3b29 | 639 | batadv_softif_vlan_free_ref(vlan); |
80b3f58c SW |
640 | goto out; |
641 | } | |
642 | ||
068ee6e2 | 643 | add_event: |
3abe4adb | 644 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 645 | |
068ee6e2 AQ |
646 | check_roaming: |
647 | /* Check whether it is a roaming, but don't do anything if the roaming | |
648 | * process has already been handled | |
649 | */ | |
650 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 651 | /* These node are probably going to update their tt table */ |
47c94655 | 652 | head = &tt_global->orig_list; |
db08e6e5 | 653 | rcu_read_lock(); |
b67bfe0d | 654 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 655 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 656 | tt_global->common.vid, |
a513088d | 657 | orig_entry->orig_node); |
db08e6e5 SW |
658 | } |
659 | rcu_read_unlock(); | |
068ee6e2 AQ |
660 | if (roamed_back) { |
661 | batadv_tt_global_free(bat_priv, tt_global, | |
662 | "Roaming canceled"); | |
663 | tt_global = NULL; | |
664 | } else { | |
665 | /* The global entry has to be marked as ROAMING and | |
666 | * has to be kept for consistency purpose | |
667 | */ | |
668 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
669 | tt_global->roam_at = jiffies; | |
670 | } | |
7683fdc1 | 671 | } |
068ee6e2 | 672 | |
3c4f7ab6 AQ |
673 | /* store the current remote flags before altering them. This helps |
674 | * understanding is flags are changing or not | |
675 | */ | |
676 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
677 | ||
678 | if (batadv_is_wifi_netdev(in_dev)) | |
679 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
680 | else | |
681 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 682 | |
9464d071 AQ |
683 | /* check the mark in the skb: if it's equal to the configured |
684 | * isolation_mark, it means the packet is coming from an isolated | |
685 | * non-mesh client | |
686 | */ | |
687 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
688 | if (bat_priv->isolation_mark_mask && | |
689 | match_mark == bat_priv->isolation_mark) | |
690 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
691 | else | |
692 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
693 | ||
3c4f7ab6 AQ |
694 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
695 | * entry so that all the nodes can get the new flags | |
696 | */ | |
697 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
698 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
699 | ||
700 | ret = true; | |
7683fdc1 | 701 | out: |
0c69aecc AQ |
702 | if (in_dev) |
703 | dev_put(in_dev); | |
47c94655 AQ |
704 | if (tt_local) |
705 | batadv_tt_local_entry_free_ref(tt_local); | |
706 | if (tt_global) | |
707 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 708 | return ret; |
c6c8fea2 SE |
709 | } |
710 | ||
7ea7b4a1 AQ |
711 | /** |
712 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
713 | * within a TT Response directed to another node | |
714 | * @orig_node: originator for which the TT data has to be prepared | |
715 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
716 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
717 | * changed can be stored | |
718 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
719 | * function reserves the amount of space needed to send the entire global TT | |
720 | * table. In case of success the value is updated with the real amount of | |
721 | * reserved bytes | |
722 | ||
723 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
724 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
725 | * objects, one per active VLAN served by the originator node. | |
726 | * | |
727 | * Return the size of the allocated buffer or 0 in case of failure. | |
728 | */ | |
6b5e971a | 729 | static u16 |
7ea7b4a1 AQ |
730 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
731 | struct batadv_tvlv_tt_data **tt_data, | |
732 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 733 | s32 *tt_len) |
7ea7b4a1 | 734 | { |
4f248cff SE |
735 | u16 num_vlan = 0; |
736 | u16 num_entries = 0; | |
737 | u16 change_offset; | |
738 | u16 tvlv_len; | |
7ea7b4a1 AQ |
739 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
740 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 741 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
742 | |
743 | rcu_read_lock(); | |
d0fa4f3f | 744 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
745 | num_vlan++; |
746 | num_entries += atomic_read(&vlan->tt.num_entries); | |
747 | } | |
748 | ||
749 | change_offset = sizeof(**tt_data); | |
750 | change_offset += num_vlan * sizeof(*tt_vlan); | |
751 | ||
752 | /* if tt_len is negative, allocate the space needed by the full table */ | |
753 | if (*tt_len < 0) | |
754 | *tt_len = batadv_tt_len(num_entries); | |
755 | ||
756 | tvlv_len = *tt_len; | |
757 | tvlv_len += change_offset; | |
758 | ||
759 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
760 | if (!*tt_data) { | |
761 | *tt_len = 0; | |
762 | goto out; | |
763 | } | |
764 | ||
765 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
766 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
767 | (*tt_data)->num_vlan = htons(num_vlan); | |
768 | ||
769 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
d0fa4f3f | 770 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
771 | tt_vlan->vid = htons(vlan->vid); |
772 | tt_vlan->crc = htonl(vlan->tt.crc); | |
773 | ||
774 | tt_vlan++; | |
775 | } | |
776 | ||
6b5e971a | 777 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
778 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
779 | ||
780 | out: | |
781 | rcu_read_unlock(); | |
782 | return tvlv_len; | |
783 | } | |
784 | ||
785 | /** | |
786 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
787 | * node | |
788 | * @bat_priv: the bat priv with all the soft interface information | |
789 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
790 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
791 | * changes can be stored | |
792 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
793 | * function reserves the amount of space needed to send the entire local TT | |
794 | * table. In case of success the value is updated with the real amount of | |
795 | * reserved bytes | |
796 | * | |
797 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
798 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
799 | * objects, one per active VLAN. | |
800 | * | |
801 | * Return the size of the allocated buffer or 0 in case of failure. | |
802 | */ | |
6b5e971a | 803 | static u16 |
7ea7b4a1 AQ |
804 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
805 | struct batadv_tvlv_tt_data **tt_data, | |
806 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 807 | s32 *tt_len) |
7ea7b4a1 AQ |
808 | { |
809 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
810 | struct batadv_softif_vlan *vlan; | |
4f248cff SE |
811 | u16 num_vlan = 0; |
812 | u16 num_entries = 0; | |
813 | u16 tvlv_len; | |
6b5e971a | 814 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
815 | int change_offset; |
816 | ||
817 | rcu_read_lock(); | |
818 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
819 | num_vlan++; | |
820 | num_entries += atomic_read(&vlan->tt.num_entries); | |
821 | } | |
822 | ||
823 | change_offset = sizeof(**tt_data); | |
824 | change_offset += num_vlan * sizeof(*tt_vlan); | |
825 | ||
826 | /* if tt_len is negative, allocate the space needed by the full table */ | |
827 | if (*tt_len < 0) | |
828 | *tt_len = batadv_tt_len(num_entries); | |
829 | ||
830 | tvlv_len = *tt_len; | |
831 | tvlv_len += change_offset; | |
832 | ||
833 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
834 | if (!*tt_data) { | |
835 | tvlv_len = 0; | |
836 | goto out; | |
837 | } | |
838 | ||
839 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
840 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
841 | (*tt_data)->num_vlan = htons(num_vlan); | |
842 | ||
843 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
844 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
845 | tt_vlan->vid = htons(vlan->vid); | |
846 | tt_vlan->crc = htonl(vlan->tt.crc); | |
847 | ||
848 | tt_vlan++; | |
849 | } | |
850 | ||
6b5e971a | 851 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
852 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
853 | ||
854 | out: | |
855 | rcu_read_unlock(); | |
856 | return tvlv_len; | |
857 | } | |
858 | ||
e1bf0c14 ML |
859 | /** |
860 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
861 | * after local tt changes have been committed | |
862 | * @bat_priv: the bat priv with all the soft interface information | |
863 | */ | |
864 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 865 | { |
e1bf0c14 ML |
866 | struct batadv_tt_change_node *entry, *safe; |
867 | struct batadv_tvlv_tt_data *tt_data; | |
868 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 869 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
870 | int tt_diff_entries_num = 0; |
871 | int tt_diff_entries_count = 0; | |
6b5e971a | 872 | u16 tvlv_len; |
be9aa4c1 | 873 | |
7ea7b4a1 AQ |
874 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
875 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
876 | |
877 | /* if we have too many changes for one packet don't send any | |
878 | * and wait for the tt table request which will be fragmented | |
879 | */ | |
e1bf0c14 ML |
880 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
881 | tt_diff_len = 0; | |
be9aa4c1 | 882 | |
7ea7b4a1 AQ |
883 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
884 | &tt_change, &tt_diff_len); | |
885 | if (!tvlv_len) | |
e1bf0c14 | 886 | return; |
be9aa4c1 | 887 | |
e1bf0c14 | 888 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 889 | |
e1bf0c14 ML |
890 | if (tt_diff_len == 0) |
891 | goto container_register; | |
be9aa4c1 | 892 | |
807736f6 SE |
893 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
894 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 895 | |
807736f6 | 896 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 897 | list) { |
e1bf0c14 ML |
898 | if (tt_diff_entries_count < tt_diff_entries_num) { |
899 | memcpy(tt_change + tt_diff_entries_count, | |
900 | &entry->change, | |
901 | sizeof(struct batadv_tvlv_tt_change)); | |
902 | tt_diff_entries_count++; | |
c6c8fea2 | 903 | } |
a73105b8 AQ |
904 | list_del(&entry->list); |
905 | kfree(entry); | |
c6c8fea2 | 906 | } |
807736f6 | 907 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
908 | |
909 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
910 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
911 | kfree(bat_priv->tt.last_changeset); | |
912 | bat_priv->tt.last_changeset_len = 0; | |
913 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 914 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 915 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 916 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 917 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
918 | * instead of providing the diff |
919 | */ | |
e1bf0c14 | 920 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 921 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
922 | memcpy(bat_priv->tt.last_changeset, |
923 | tt_change, tt_change_len); | |
924 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
925 | } |
926 | } | |
807736f6 | 927 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 928 | |
e1bf0c14 ML |
929 | container_register: |
930 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 931 | tvlv_len); |
e1bf0c14 | 932 | kfree(tt_data); |
c6c8fea2 SE |
933 | } |
934 | ||
08c36d3e | 935 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
936 | { |
937 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 938 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 939 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 940 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 941 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 942 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 943 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 944 | struct hlist_head *head; |
7ea7b4a1 | 945 | unsigned short vid; |
6b5e971a | 946 | u32 i; |
85766a82 AQ |
947 | int last_seen_secs; |
948 | int last_seen_msecs; | |
949 | unsigned long last_seen_jiffies; | |
950 | bool no_purge; | |
6b5e971a | 951 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 952 | |
30da63a6 ML |
953 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
954 | if (!primary_if) | |
32ae9b22 | 955 | goto out; |
c6c8fea2 | 956 | |
86ceb360 | 957 | seq_printf(seq, |
7ea7b4a1 | 958 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 959 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
dd24ddb2 | 960 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 961 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 962 | |
c6c8fea2 SE |
963 | for (i = 0; i < hash->size; i++) { |
964 | head = &hash->table[i]; | |
965 | ||
7aadf889 | 966 | rcu_read_lock(); |
b67bfe0d | 967 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 968 | head, hash_entry) { |
85766a82 AQ |
969 | tt_local = container_of(tt_common_entry, |
970 | struct batadv_tt_local_entry, | |
971 | common); | |
7ea7b4a1 | 972 | vid = tt_common_entry->vid; |
85766a82 AQ |
973 | last_seen_jiffies = jiffies - tt_local->last_seen; |
974 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
975 | last_seen_secs = last_seen_msecs / 1000; | |
976 | last_seen_msecs = last_seen_msecs % 1000; | |
977 | ||
978 | no_purge = tt_common_entry->flags & np_flag; | |
979 | ||
7ea7b4a1 AQ |
980 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
981 | if (!vlan) { | |
982 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
983 | BATADV_PRINT_VID(vid)); | |
984 | continue; | |
985 | } | |
986 | ||
987 | seq_printf(seq, | |
dd24ddb2 | 988 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 989 | tt_common_entry->addr, |
16052789 | 990 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
991 | ((tt_common_entry->flags & |
992 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 993 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
994 | ((tt_common_entry->flags & |
995 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
996 | ((tt_common_entry->flags & | |
997 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
998 | ((tt_common_entry->flags & | |
999 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1000 | ((tt_common_entry->flags & | |
1001 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1002 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
1003 | no_purge ? 0 : last_seen_msecs, |
1004 | vlan->tt.crc); | |
1005 | ||
1006 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 1007 | } |
7aadf889 | 1008 | rcu_read_unlock(); |
c6c8fea2 | 1009 | } |
32ae9b22 ML |
1010 | out: |
1011 | if (primary_if) | |
e5d89254 | 1012 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1013 | return 0; |
c6c8fea2 SE |
1014 | } |
1015 | ||
56303d34 SE |
1016 | static void |
1017 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1018 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1019 | u16 flags, const char *message) |
c6c8fea2 | 1020 | { |
3abe4adb | 1021 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1022 | |
015758d0 AQ |
1023 | /* The local client has to be marked as "pending to be removed" but has |
1024 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1025 | * response issued before the net ttvn increment (consistency check) |
1026 | */ | |
acd34afa | 1027 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1028 | |
39c75a51 | 1029 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1030 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1031 | tt_local_entry->common.addr, | |
1032 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1033 | } |
1034 | ||
7f91d06c AQ |
1035 | /** |
1036 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1037 | * @bat_priv: the bat priv with all the soft interface information | |
1038 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1039 | * @vid: VLAN identifier |
7f91d06c AQ |
1040 | * @message: message to append to the log on deletion |
1041 | * @roaming: true if the deletion is due to a roaming event | |
1042 | * | |
1043 | * Returns the flags assigned to the local entry before being deleted | |
1044 | */ | |
6b5e971a SE |
1045 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1046 | unsigned short vid, const char *message, | |
1047 | bool roaming) | |
c6c8fea2 | 1048 | { |
170173bf | 1049 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1050 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
35df3b29 | 1051 | struct batadv_softif_vlan *vlan; |
ef72706a | 1052 | void *tt_entry_exists; |
c6c8fea2 | 1053 | |
c018ad3d | 1054 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1055 | if (!tt_local_entry) |
1056 | goto out; | |
1057 | ||
7f91d06c AQ |
1058 | curr_flags = tt_local_entry->common.flags; |
1059 | ||
acd34afa | 1060 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1061 | /* if this global entry addition is due to a roaming, the node has to |
1062 | * mark the local entry as "roamed" in order to correctly reroute | |
1063 | * packets later | |
1064 | */ | |
7c1fd91d | 1065 | if (roaming) { |
acd34afa | 1066 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1067 | /* mark the local client as ROAMed */ |
1068 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1069 | } | |
42d0b044 | 1070 | |
068ee6e2 AQ |
1071 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1072 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1073 | message); | |
1074 | goto out; | |
1075 | } | |
1076 | /* if this client has been added right now, it is possible to | |
1077 | * immediately purge it | |
1078 | */ | |
3abe4adb | 1079 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1080 | |
1081 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1082 | batadv_compare_tt, | |
1083 | batadv_choose_tt, | |
1084 | &tt_local_entry->common); | |
1085 | if (!tt_entry_exists) | |
1086 | goto out; | |
1087 | ||
1088 | /* extra call to free the local tt entry */ | |
068ee6e2 | 1089 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c | 1090 | |
35df3b29 AQ |
1091 | /* decrease the reference held for this vlan */ |
1092 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc ML |
1093 | if (!vlan) |
1094 | goto out; | |
1095 | ||
35df3b29 AQ |
1096 | batadv_softif_vlan_free_ref(vlan); |
1097 | batadv_softif_vlan_free_ref(vlan); | |
1098 | ||
7683fdc1 AQ |
1099 | out: |
1100 | if (tt_local_entry) | |
a513088d | 1101 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1102 | |
1103 | return curr_flags; | |
c6c8fea2 SE |
1104 | } |
1105 | ||
a19d3d85 ML |
1106 | /** |
1107 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1108 | * @bat_priv: the bat priv with all the soft interface information | |
1109 | * @head: pointer to the list containing the local tt entries | |
1110 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1111 | * inactive or not | |
1112 | */ | |
56303d34 | 1113 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1114 | struct hlist_head *head, |
1115 | int timeout) | |
c6c8fea2 | 1116 | { |
56303d34 SE |
1117 | struct batadv_tt_local_entry *tt_local_entry; |
1118 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1119 | struct hlist_node *node_tmp; |
acd34afa | 1120 | |
b67bfe0d | 1121 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1122 | hash_entry) { |
1123 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1124 | struct batadv_tt_local_entry, |
1125 | common); | |
acd34afa SE |
1126 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1127 | continue; | |
1128 | ||
1129 | /* entry already marked for deletion */ | |
1130 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1131 | continue; | |
1132 | ||
a19d3d85 | 1133 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1134 | continue; |
1135 | ||
1136 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1137 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1138 | } | |
1139 | } | |
1140 | ||
a19d3d85 ML |
1141 | /** |
1142 | * batadv_tt_local_purge - purge inactive tt local entries | |
1143 | * @bat_priv: the bat priv with all the soft interface information | |
1144 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1145 | * inactive or not | |
1146 | */ | |
1147 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1148 | int timeout) | |
acd34afa | 1149 | { |
807736f6 | 1150 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1151 | struct hlist_head *head; |
7683fdc1 | 1152 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1153 | u32 i; |
c6c8fea2 | 1154 | |
c6c8fea2 SE |
1155 | for (i = 0; i < hash->size; i++) { |
1156 | head = &hash->table[i]; | |
7683fdc1 | 1157 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1158 | |
7683fdc1 | 1159 | spin_lock_bh(list_lock); |
a19d3d85 | 1160 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1161 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1162 | } |
c6c8fea2 SE |
1163 | } |
1164 | ||
56303d34 | 1165 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1166 | { |
5bf74e9c | 1167 | struct batadv_hashtable *hash; |
a73105b8 | 1168 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1169 | struct batadv_tt_common_entry *tt_common_entry; |
1170 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 1171 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 1172 | struct hlist_node *node_tmp; |
7683fdc1 | 1173 | struct hlist_head *head; |
6b5e971a | 1174 | u32 i; |
a73105b8 | 1175 | |
807736f6 | 1176 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1177 | return; |
1178 | ||
807736f6 | 1179 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1180 | |
1181 | for (i = 0; i < hash->size; i++) { | |
1182 | head = &hash->table[i]; | |
1183 | list_lock = &hash->list_locks[i]; | |
1184 | ||
1185 | spin_lock_bh(list_lock); | |
b67bfe0d | 1186 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1187 | head, hash_entry) { |
b67bfe0d | 1188 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1189 | tt_local = container_of(tt_common_entry, |
1190 | struct batadv_tt_local_entry, | |
1191 | common); | |
35df3b29 AQ |
1192 | |
1193 | /* decrease the reference held for this vlan */ | |
1194 | vlan = batadv_softif_vlan_get(bat_priv, | |
1195 | tt_common_entry->vid); | |
354136bc ML |
1196 | if (vlan) { |
1197 | batadv_softif_vlan_free_ref(vlan); | |
1198 | batadv_softif_vlan_free_ref(vlan); | |
1199 | } | |
35df3b29 | 1200 | |
56303d34 | 1201 | batadv_tt_local_entry_free_ref(tt_local); |
a73105b8 AQ |
1202 | } |
1203 | spin_unlock_bh(list_lock); | |
1204 | } | |
1205 | ||
1a8eaf07 | 1206 | batadv_hash_destroy(hash); |
a73105b8 | 1207 | |
807736f6 | 1208 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1209 | } |
1210 | ||
56303d34 | 1211 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1212 | { |
807736f6 | 1213 | if (bat_priv->tt.global_hash) |
5346c35e | 1214 | return 0; |
c6c8fea2 | 1215 | |
807736f6 | 1216 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1217 | |
807736f6 | 1218 | if (!bat_priv->tt.global_hash) |
5346c35e | 1219 | return -ENOMEM; |
c6c8fea2 | 1220 | |
dec05074 AQ |
1221 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1222 | &batadv_tt_global_hash_lock_class_key); | |
1223 | ||
5346c35e | 1224 | return 0; |
c6c8fea2 SE |
1225 | } |
1226 | ||
56303d34 | 1227 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1228 | { |
56303d34 | 1229 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1230 | |
807736f6 | 1231 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1232 | |
807736f6 | 1233 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1234 | list) { |
1235 | list_del(&entry->list); | |
1236 | kfree(entry); | |
1237 | } | |
c6c8fea2 | 1238 | |
807736f6 SE |
1239 | atomic_set(&bat_priv->tt.local_changes, 0); |
1240 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1241 | } |
c6c8fea2 | 1242 | |
d657e621 AQ |
1243 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1244 | * batadv_tt_global_entry list | |
1245 | * | |
1246 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1247 | */ |
d657e621 AQ |
1248 | static struct batadv_tt_orig_list_entry * |
1249 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1250 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1251 | { |
d657e621 | 1252 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1253 | const struct hlist_head *head; |
db08e6e5 SW |
1254 | |
1255 | rcu_read_lock(); | |
1256 | head = &entry->orig_list; | |
b67bfe0d | 1257 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1258 | if (tmp_orig_entry->orig_node != orig_node) |
1259 | continue; | |
1260 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1261 | continue; | |
1262 | ||
1263 | orig_entry = tmp_orig_entry; | |
1264 | break; | |
db08e6e5 SW |
1265 | } |
1266 | rcu_read_unlock(); | |
d657e621 AQ |
1267 | |
1268 | return orig_entry; | |
1269 | } | |
1270 | ||
1271 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1272 | * returns true if found, false otherwise | |
1273 | */ | |
1274 | static bool | |
1275 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1276 | const struct batadv_orig_node *orig_node) | |
1277 | { | |
1278 | struct batadv_tt_orig_list_entry *orig_entry; | |
1279 | bool found = false; | |
1280 | ||
1281 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1282 | if (orig_entry) { | |
1283 | found = true; | |
1284 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1285 | } | |
1286 | ||
db08e6e5 SW |
1287 | return found; |
1288 | } | |
1289 | ||
a513088d | 1290 | static void |
d657e621 | 1291 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1292 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1293 | { |
56303d34 | 1294 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1295 | |
d657e621 | 1296 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1297 | if (orig_entry) { |
1298 | /* refresh the ttvn: the current value could be a bogus one that | |
1299 | * was added during a "temporary client detection" | |
1300 | */ | |
1301 | orig_entry->ttvn = ttvn; | |
d657e621 | 1302 | goto out; |
30cfd02b | 1303 | } |
d657e621 | 1304 | |
db08e6e5 SW |
1305 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1306 | if (!orig_entry) | |
d657e621 | 1307 | goto out; |
db08e6e5 SW |
1308 | |
1309 | INIT_HLIST_NODE(&orig_entry->list); | |
1310 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1311 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1312 | orig_entry->orig_node = orig_node; |
1313 | orig_entry->ttvn = ttvn; | |
d657e621 | 1314 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1315 | |
d657e621 | 1316 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1317 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1318 | &tt_global->orig_list); |
1319 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1320 | atomic_inc(&tt_global->orig_list_count); |
1321 | ||
d657e621 AQ |
1322 | out: |
1323 | if (orig_entry) | |
1324 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1325 | } |
1326 | ||
d4ff40f6 AQ |
1327 | /** |
1328 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1329 | * @bat_priv: the bat priv with all the soft interface information | |
1330 | * @orig_node: the originator announcing the client | |
1331 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1332 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1333 | * @flags: TT flags that have to be set for this non-mesh client |
1334 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1335 | * | |
1336 | * Add a new TT global entry for the given originator. If the entry already | |
1337 | * exists add a new reference to the given originator (a global entry can have | |
1338 | * references to multiple originators) and adjust the flags attribute to reflect | |
1339 | * the function argument. | |
1340 | * If a TT local entry exists for this non-mesh client remove it. | |
1341 | * | |
1342 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1343 | * |
1344 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1345 | */ |
1e5d49fc AQ |
1346 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1347 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1348 | const unsigned char *tt_addr, |
6b5e971a | 1349 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1350 | { |
170173bf SE |
1351 | struct batadv_tt_global_entry *tt_global_entry; |
1352 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1353 | bool ret = false; |
80b3f58c | 1354 | int hash_added; |
56303d34 | 1355 | struct batadv_tt_common_entry *common; |
6b5e971a | 1356 | u16 local_flags; |
c6c8fea2 | 1357 | |
cfd4f757 AQ |
1358 | /* ignore global entries from backbone nodes */ |
1359 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1360 | return true; | |
1361 | ||
c018ad3d AQ |
1362 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1363 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1364 | |
1365 | /* if the node already has a local client for this entry, it has to wait | |
1366 | * for a roaming advertisement instead of manually messing up the global | |
1367 | * table | |
1368 | */ | |
1369 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1370 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1371 | goto out; | |
a73105b8 AQ |
1372 | |
1373 | if (!tt_global_entry) { | |
d4f44692 | 1374 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1375 | if (!tt_global_entry) |
7683fdc1 AQ |
1376 | goto out; |
1377 | ||
c0a55929 | 1378 | common = &tt_global_entry->common; |
8fdd0153 | 1379 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1380 | common->vid = vid; |
db08e6e5 | 1381 | |
d4f44692 | 1382 | common->flags = flags; |
cc47f66e | 1383 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1384 | /* node must store current time in case of roaming. This is |
1385 | * needed to purge this entry out on timeout (if nobody claims | |
1386 | * it) | |
1387 | */ | |
1388 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1389 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1390 | atomic_set(&common->refcount, 2); |
30cfd02b | 1391 | common->added_at = jiffies; |
db08e6e5 SW |
1392 | |
1393 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1394 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1395 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1396 | |
807736f6 | 1397 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1398 | batadv_compare_tt, |
c018ad3d | 1399 | batadv_choose_tt, common, |
a513088d | 1400 | &common->hash_entry); |
80b3f58c SW |
1401 | |
1402 | if (unlikely(hash_added != 0)) { | |
1403 | /* remove the reference for the hash */ | |
a513088d | 1404 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1405 | goto out_remove; |
1406 | } | |
a73105b8 | 1407 | } else { |
068ee6e2 | 1408 | common = &tt_global_entry->common; |
30cfd02b AQ |
1409 | /* If there is already a global entry, we can use this one for |
1410 | * our processing. | |
068ee6e2 AQ |
1411 | * But if we are trying to add a temporary client then here are |
1412 | * two options at this point: | |
1413 | * 1) the global client is not a temporary client: the global | |
1414 | * client has to be left as it is, temporary information | |
1415 | * should never override any already known client state | |
1416 | * 2) the global client is a temporary client: purge the | |
1417 | * originator list and add the new one orig_entry | |
30cfd02b | 1418 | */ |
068ee6e2 AQ |
1419 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1420 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1421 | goto out; | |
1422 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1423 | orig_node)) | |
1424 | goto out_remove; | |
1425 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1426 | goto add_orig_entry; | |
1427 | } | |
30cfd02b AQ |
1428 | |
1429 | /* if the client was temporary added before receiving the first | |
1430 | * OGM announcing it, we have to clear the TEMP flag | |
1431 | */ | |
068ee6e2 | 1432 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 1433 | |
e9c00136 AQ |
1434 | /* the change can carry possible "attribute" flags like the |
1435 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1436 | * client entry | |
1437 | */ | |
1438 | tt_global_entry->common.flags |= flags; | |
1439 | ||
acd34afa SE |
1440 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1441 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1442 | * delete + roaming change for this originator. |
1443 | * | |
1444 | * We should first delete the old originator before adding the | |
1445 | * new one. | |
1446 | */ | |
068ee6e2 | 1447 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1448 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1449 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1450 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1451 | } |
1452 | } | |
068ee6e2 | 1453 | add_orig_entry: |
30cfd02b | 1454 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1455 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1456 | |
39c75a51 | 1457 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1458 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1459 | common->addr, BATADV_PRINT_VID(common->vid), | |
1460 | orig_node->orig); | |
1e5d49fc | 1461 | ret = true; |
c6c8fea2 | 1462 | |
80b3f58c | 1463 | out_remove: |
c5caf4ef LL |
1464 | /* Do not remove multicast addresses from the local hash on |
1465 | * global additions | |
1466 | */ | |
1467 | if (is_multicast_ether_addr(tt_addr)) | |
1468 | goto out; | |
7f91d06c | 1469 | |
a73105b8 | 1470 | /* remove address from local hash if present */ |
c018ad3d | 1471 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1472 | "global tt received", |
c1d07431 | 1473 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1474 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1475 | ||
068ee6e2 AQ |
1476 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1477 | /* this is a normal global add. Therefore the client is not in a | |
1478 | * roaming state anymore. | |
1479 | */ | |
1480 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1481 | ||
7683fdc1 AQ |
1482 | out: |
1483 | if (tt_global_entry) | |
a513088d | 1484 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1485 | if (tt_local_entry) |
1486 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1487 | return ret; |
c6c8fea2 SE |
1488 | } |
1489 | ||
1b371d13 SW |
1490 | /** |
1491 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1492 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1493 | * @tt_global_entry: global translation table entry to be analyzed |
1494 | * | |
1495 | * This functon assumes the caller holds rcu_read_lock(). | |
1496 | * Returns best originator list entry or NULL on errors. | |
1497 | */ | |
1498 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1499 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1500 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1501 | { |
4627456a AQ |
1502 | struct batadv_neigh_node *router, *best_router = NULL; |
1503 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1504 | struct hlist_head *head; |
981d8900 | 1505 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1506 | |
1507 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1508 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1509 | router = batadv_orig_router_get(orig_entry->orig_node, |
1510 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1511 | if (!router) |
1512 | continue; | |
1513 | ||
4627456a | 1514 | if (best_router && |
89652331 SW |
1515 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1516 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1517 | batadv_neigh_node_free_ref(router); |
1518 | continue; | |
981d8900 SE |
1519 | } |
1520 | ||
4627456a AQ |
1521 | /* release the refcount for the "old" best */ |
1522 | if (best_router) | |
1523 | batadv_neigh_node_free_ref(best_router); | |
1524 | ||
1525 | best_entry = orig_entry; | |
1526 | best_router = router; | |
981d8900 SE |
1527 | } |
1528 | ||
4627456a AQ |
1529 | if (best_router) |
1530 | batadv_neigh_node_free_ref(best_router); | |
1531 | ||
981d8900 SE |
1532 | return best_entry; |
1533 | } | |
1534 | ||
1b371d13 SW |
1535 | /** |
1536 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1537 | * for this global entry | |
4627456a | 1538 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1539 | * @tt_global_entry: global translation table entry to be printed |
1540 | * @seq: debugfs table seq_file struct | |
1541 | * | |
1542 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1543 | */ |
a513088d | 1544 | static void |
4627456a AQ |
1545 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1546 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1547 | struct seq_file *seq) |
db08e6e5 | 1548 | { |
981d8900 | 1549 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1550 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1551 | struct batadv_orig_node_vlan *vlan; |
1552 | struct hlist_head *head; | |
6b5e971a SE |
1553 | u8 last_ttvn; |
1554 | u16 flags; | |
db08e6e5 SW |
1555 | |
1556 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1557 | flags = tt_common_entry->flags; |
1558 | ||
4627456a | 1559 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1560 | if (best_entry) { |
7ea7b4a1 AQ |
1561 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1562 | tt_common_entry->vid); | |
1563 | if (!vlan) { | |
1564 | seq_printf(seq, | |
1565 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1566 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1567 | best_entry->orig_node->orig); | |
1568 | goto print_list; | |
1569 | } | |
1570 | ||
981d8900 | 1571 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1572 | seq_printf(seq, |
dd24ddb2 | 1573 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1574 | '*', tt_global_entry->common.addr, |
16052789 | 1575 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1576 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1577 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1578 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1579 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1580 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1581 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1582 | |
1583 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1584 | } |
db08e6e5 | 1585 | |
7ea7b4a1 | 1586 | print_list: |
db08e6e5 SW |
1587 | head = &tt_global_entry->orig_list; |
1588 | ||
b67bfe0d | 1589 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1590 | if (best_entry == orig_entry) |
1591 | continue; | |
1592 | ||
7ea7b4a1 AQ |
1593 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1594 | tt_common_entry->vid); | |
1595 | if (!vlan) { | |
1596 | seq_printf(seq, | |
1597 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1598 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1599 | orig_entry->orig_node->orig); | |
1600 | continue; | |
1601 | } | |
1602 | ||
db08e6e5 | 1603 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1604 | seq_printf(seq, |
dd24ddb2 | 1605 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1606 | '+', tt_global_entry->common.addr, |
16052789 | 1607 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1608 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1609 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1610 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1611 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1612 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1613 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1614 | |
1615 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1616 | } |
1617 | } | |
1618 | ||
08c36d3e | 1619 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1620 | { |
1621 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1622 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1623 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1624 | struct batadv_tt_common_entry *tt_common_entry; |
1625 | struct batadv_tt_global_entry *tt_global; | |
1626 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1627 | struct hlist_head *head; |
6b5e971a | 1628 | u32 i; |
c6c8fea2 | 1629 | |
30da63a6 ML |
1630 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1631 | if (!primary_if) | |
32ae9b22 | 1632 | goto out; |
c6c8fea2 | 1633 | |
2dafb49d AQ |
1634 | seq_printf(seq, |
1635 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1636 | net_dev->name); |
16052789 AQ |
1637 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1638 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1639 | "CRC", "Flags"); | |
c6c8fea2 | 1640 | |
c6c8fea2 SE |
1641 | for (i = 0; i < hash->size; i++) { |
1642 | head = &hash->table[i]; | |
1643 | ||
7aadf889 | 1644 | rcu_read_lock(); |
b67bfe0d | 1645 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1646 | head, hash_entry) { |
56303d34 SE |
1647 | tt_global = container_of(tt_common_entry, |
1648 | struct batadv_tt_global_entry, | |
1649 | common); | |
4627456a | 1650 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1651 | } |
7aadf889 | 1652 | rcu_read_unlock(); |
c6c8fea2 | 1653 | } |
32ae9b22 ML |
1654 | out: |
1655 | if (primary_if) | |
e5d89254 | 1656 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1657 | return 0; |
c6c8fea2 SE |
1658 | } |
1659 | ||
1d8ab8d3 | 1660 | /** |
433ff98f | 1661 | * _batadv_tt_global_del_orig_entry - remove and free an orig_entry |
1d8ab8d3 LL |
1662 | * @tt_global_entry: the global entry to remove the orig_entry from |
1663 | * @orig_entry: the orig entry to remove and free | |
1664 | * | |
1665 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1666 | * free this orig_entry afterwards. | |
433ff98f ML |
1667 | * |
1668 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
1669 | * part of a list. | |
1d8ab8d3 LL |
1670 | */ |
1671 | static void | |
433ff98f ML |
1672 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
1673 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 1674 | { |
2c72d655 SE |
1675 | lockdep_assert_held(&tt_global_entry->list_lock); |
1676 | ||
1d8ab8d3 LL |
1677 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1678 | tt_global_entry->common.vid); | |
1679 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
1680 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
1681 | * being part of a list | |
1682 | */ | |
1d8ab8d3 LL |
1683 | hlist_del_rcu(&orig_entry->list); |
1684 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1685 | } | |
1686 | ||
db08e6e5 | 1687 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1688 | static void |
56303d34 | 1689 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1690 | { |
db08e6e5 | 1691 | struct hlist_head *head; |
b67bfe0d | 1692 | struct hlist_node *safe; |
56303d34 | 1693 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1694 | |
db08e6e5 SW |
1695 | spin_lock_bh(&tt_global_entry->list_lock); |
1696 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 1697 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 1698 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 1699 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1700 | } |
1701 | ||
1d8ab8d3 LL |
1702 | /** |
1703 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1704 | * @bat_priv: the bat priv with all the soft interface information | |
1705 | * @tt_global_entry: the global entry to remove the orig_node from | |
1706 | * @orig_node: the originator announcing the client | |
1707 | * @message: message to append to the log on deletion | |
1708 | * | |
1709 | * Remove the given orig_node and its according orig_entry from the given | |
1710 | * global tt entry. | |
1711 | */ | |
a513088d | 1712 | static void |
1d8ab8d3 LL |
1713 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1714 | struct batadv_tt_global_entry *tt_global_entry, | |
1715 | struct batadv_orig_node *orig_node, | |
1716 | const char *message) | |
db08e6e5 SW |
1717 | { |
1718 | struct hlist_head *head; | |
b67bfe0d | 1719 | struct hlist_node *safe; |
56303d34 | 1720 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1721 | unsigned short vid; |
db08e6e5 SW |
1722 | |
1723 | spin_lock_bh(&tt_global_entry->list_lock); | |
1724 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1725 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1726 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1727 | vid = tt_global_entry->common.vid; |
39c75a51 | 1728 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1729 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1730 | orig_node->orig, |
16052789 AQ |
1731 | tt_global_entry->common.addr, |
1732 | BATADV_PRINT_VID(vid), message); | |
433ff98f ML |
1733 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
1734 | orig_entry); | |
db08e6e5 SW |
1735 | } |
1736 | } | |
1737 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1738 | } | |
1739 | ||
db08e6e5 | 1740 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1741 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1742 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1743 | */ |
a513088d | 1744 | static void |
56303d34 SE |
1745 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1746 | struct batadv_tt_global_entry *tt_global_entry, | |
1747 | struct batadv_orig_node *orig_node, | |
1748 | const char *message) | |
db08e6e5 SW |
1749 | { |
1750 | bool last_entry = true; | |
1751 | struct hlist_head *head; | |
56303d34 | 1752 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1753 | |
1754 | /* no local entry exists, case 1: | |
1755 | * Check if this is the last one or if other entries exist. | |
1756 | */ | |
1757 | ||
1758 | rcu_read_lock(); | |
1759 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1760 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1761 | if (orig_entry->orig_node != orig_node) { |
1762 | last_entry = false; | |
1763 | break; | |
1764 | } | |
1765 | } | |
1766 | rcu_read_unlock(); | |
1767 | ||
1768 | if (last_entry) { | |
1769 | /* its the last one, mark for roaming. */ | |
acd34afa | 1770 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1771 | tt_global_entry->roam_at = jiffies; |
1772 | } else | |
1773 | /* there is another entry, we can simply delete this | |
1774 | * one and can still use the other one. | |
1775 | */ | |
1d8ab8d3 LL |
1776 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1777 | orig_node, message); | |
db08e6e5 SW |
1778 | } |
1779 | ||
c018ad3d AQ |
1780 | /** |
1781 | * batadv_tt_global_del - remove a client from the global table | |
1782 | * @bat_priv: the bat priv with all the soft interface information | |
1783 | * @orig_node: an originator serving this client | |
1784 | * @addr: the mac address of the client | |
1785 | * @vid: VLAN identifier | |
1786 | * @message: a message explaining the reason for deleting the client to print | |
1787 | * for debugging purpose | |
1788 | * @roaming: true if the deletion has been triggered by a roaming event | |
1789 | */ | |
56303d34 SE |
1790 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1791 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1792 | const unsigned char *addr, unsigned short vid, |
a513088d | 1793 | const char *message, bool roaming) |
a73105b8 | 1794 | { |
170173bf | 1795 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1796 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1797 | |
c018ad3d | 1798 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1799 | if (!tt_global_entry) |
7683fdc1 | 1800 | goto out; |
a73105b8 | 1801 | |
db08e6e5 | 1802 | if (!roaming) { |
1d8ab8d3 LL |
1803 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1804 | orig_node, message); | |
db08e6e5 SW |
1805 | |
1806 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1807 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1808 | message); | |
db08e6e5 SW |
1809 | |
1810 | goto out; | |
1811 | } | |
92f90f56 SE |
1812 | |
1813 | /* if we are deleting a global entry due to a roam | |
1814 | * event, there are two possibilities: | |
db08e6e5 SW |
1815 | * 1) the client roamed from node A to node B => if there |
1816 | * is only one originator left for this client, we mark | |
acd34afa | 1817 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1818 | * wait for node B to claim it. In case of timeout |
1819 | * the entry is purged. | |
db08e6e5 SW |
1820 | * |
1821 | * If there are other originators left, we directly delete | |
1822 | * the originator. | |
92f90f56 | 1823 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1824 | * the global entry, since it is useless now. |
1825 | */ | |
a513088d | 1826 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1827 | tt_global_entry->common.addr, |
1828 | vid); | |
a513088d | 1829 | if (local_entry) { |
db08e6e5 | 1830 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1831 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1832 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1833 | } else |
1834 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1835 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1836 | orig_node, message); | |
92f90f56 | 1837 | |
cc47f66e | 1838 | out: |
7683fdc1 | 1839 | if (tt_global_entry) |
a513088d SE |
1840 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1841 | if (local_entry) | |
1842 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1843 | } |
1844 | ||
95fb130d AQ |
1845 | /** |
1846 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1847 | * given originator matching the provided vid | |
1848 | * @bat_priv: the bat priv with all the soft interface information | |
1849 | * @orig_node: the originator owning the entries to remove | |
1850 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1851 | * removed | |
1852 | * @message: debug message to print as "reason" | |
1853 | */ | |
56303d34 SE |
1854 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1855 | struct batadv_orig_node *orig_node, | |
6b5e971a | 1856 | s32 match_vid, |
56303d34 | 1857 | const char *message) |
c6c8fea2 | 1858 | { |
56303d34 SE |
1859 | struct batadv_tt_global_entry *tt_global; |
1860 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 1861 | u32 i; |
807736f6 | 1862 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1863 | struct hlist_node *safe; |
a73105b8 | 1864 | struct hlist_head *head; |
7683fdc1 | 1865 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1866 | unsigned short vid; |
c6c8fea2 | 1867 | |
6e801494 SW |
1868 | if (!hash) |
1869 | return; | |
1870 | ||
a73105b8 AQ |
1871 | for (i = 0; i < hash->size; i++) { |
1872 | head = &hash->table[i]; | |
7683fdc1 | 1873 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1874 | |
7683fdc1 | 1875 | spin_lock_bh(list_lock); |
b67bfe0d | 1876 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1877 | head, hash_entry) { |
95fb130d AQ |
1878 | /* remove only matching entries */ |
1879 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1880 | continue; | |
1881 | ||
56303d34 SE |
1882 | tt_global = container_of(tt_common_entry, |
1883 | struct batadv_tt_global_entry, | |
1884 | common); | |
db08e6e5 | 1885 | |
1d8ab8d3 LL |
1886 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1887 | orig_node, message); | |
db08e6e5 | 1888 | |
56303d34 | 1889 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1890 | vid = tt_global->common.vid; |
39c75a51 | 1891 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1892 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1893 | tt_global->common.addr, | |
1894 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1895 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1896 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1897 | } |
a73105b8 | 1898 | } |
7683fdc1 | 1899 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1900 | } |
ac4eebd4 | 1901 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
1902 | } |
1903 | ||
30cfd02b AQ |
1904 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1905 | char **msg) | |
cc47f66e | 1906 | { |
30cfd02b AQ |
1907 | bool purge = false; |
1908 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1909 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1910 | |
30cfd02b AQ |
1911 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1912 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1913 | purge = true; | |
1914 | *msg = "Roaming timeout\n"; | |
1915 | } | |
42d0b044 | 1916 | |
30cfd02b AQ |
1917 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1918 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1919 | purge = true; | |
1920 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1921 | } |
30cfd02b AQ |
1922 | |
1923 | return purge; | |
42d0b044 SE |
1924 | } |
1925 | ||
30cfd02b | 1926 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1927 | { |
807736f6 | 1928 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1929 | struct hlist_head *head; |
b67bfe0d | 1930 | struct hlist_node *node_tmp; |
7683fdc1 | 1931 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1932 | u32 i; |
30cfd02b AQ |
1933 | char *msg = NULL; |
1934 | struct batadv_tt_common_entry *tt_common; | |
1935 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1936 | |
cc47f66e AQ |
1937 | for (i = 0; i < hash->size; i++) { |
1938 | head = &hash->table[i]; | |
7683fdc1 | 1939 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1940 | |
7683fdc1 | 1941 | spin_lock_bh(list_lock); |
b67bfe0d | 1942 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1943 | hash_entry) { |
1944 | tt_global = container_of(tt_common, | |
1945 | struct batadv_tt_global_entry, | |
1946 | common); | |
1947 | ||
1948 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1949 | continue; | |
1950 | ||
1951 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1952 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1953 | tt_global->common.addr, | |
1954 | BATADV_PRINT_VID(tt_global->common.vid), | |
1955 | msg); | |
30cfd02b | 1956 | |
b67bfe0d | 1957 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1958 | |
1959 | batadv_tt_global_entry_free_ref(tt_global); | |
1960 | } | |
7683fdc1 | 1961 | spin_unlock_bh(list_lock); |
cc47f66e | 1962 | } |
cc47f66e AQ |
1963 | } |
1964 | ||
56303d34 | 1965 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1966 | { |
5bf74e9c | 1967 | struct batadv_hashtable *hash; |
7683fdc1 | 1968 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1969 | struct batadv_tt_common_entry *tt_common_entry; |
1970 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1971 | struct hlist_node *node_tmp; |
7683fdc1 | 1972 | struct hlist_head *head; |
6b5e971a | 1973 | u32 i; |
7683fdc1 | 1974 | |
807736f6 | 1975 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1976 | return; |
1977 | ||
807736f6 | 1978 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1979 | |
1980 | for (i = 0; i < hash->size; i++) { | |
1981 | head = &hash->table[i]; | |
1982 | list_lock = &hash->list_locks[i]; | |
1983 | ||
1984 | spin_lock_bh(list_lock); | |
b67bfe0d | 1985 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1986 | head, hash_entry) { |
b67bfe0d | 1987 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1988 | tt_global = container_of(tt_common_entry, |
1989 | struct batadv_tt_global_entry, | |
1990 | common); | |
1991 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1992 | } |
1993 | spin_unlock_bh(list_lock); | |
1994 | } | |
1995 | ||
1a8eaf07 | 1996 | batadv_hash_destroy(hash); |
7683fdc1 | 1997 | |
807736f6 | 1998 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1999 | } |
2000 | ||
56303d34 SE |
2001 | static bool |
2002 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2003 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
2004 | { |
2005 | bool ret = false; | |
2006 | ||
acd34afa SE |
2007 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2008 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
2009 | ret = true; |
2010 | ||
2d2fcc2a AQ |
2011 | /* check if the two clients are marked as isolated */ |
2012 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2013 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
2014 | ret = true; | |
2015 | ||
59b699cd AQ |
2016 | return ret; |
2017 | } | |
2018 | ||
c018ad3d AQ |
2019 | /** |
2020 | * batadv_transtable_search - get the mesh destination for a given client | |
2021 | * @bat_priv: the bat priv with all the soft interface information | |
2022 | * @src: mac address of the source client | |
2023 | * @addr: mac address of the destination client | |
2024 | * @vid: VLAN identifier | |
2025 | * | |
2026 | * Returns a pointer to the originator that was selected as destination in the | |
2027 | * mesh for contacting the client 'addr', NULL otherwise. | |
2028 | * In case of multiple originators serving the same client, the function returns | |
2029 | * the best one (best in terms of metric towards the destination node). | |
2030 | * | |
2031 | * If the two clients are AP isolated the function returns NULL. | |
2032 | */ | |
56303d34 | 2033 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2034 | const u8 *src, |
2035 | const u8 *addr, | |
c018ad3d | 2036 | unsigned short vid) |
c6c8fea2 | 2037 | { |
56303d34 SE |
2038 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2039 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2040 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2041 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2042 | |
eceb22ae | 2043 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2044 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2045 | if (!tt_local_entry || |
2046 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2047 | goto out; |
2048 | } | |
7aadf889 | 2049 | |
c018ad3d | 2050 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2051 | if (!tt_global_entry) |
7b36e8ee | 2052 | goto out; |
7aadf889 | 2053 | |
3d393e47 | 2054 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2055 | * isolation |
2056 | */ | |
a513088d SE |
2057 | if (tt_local_entry && |
2058 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2059 | goto out; |
2060 | ||
db08e6e5 | 2061 | rcu_read_lock(); |
4627456a | 2062 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2063 | /* found anything? */ |
981d8900 SE |
2064 | if (best_entry) |
2065 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
2066 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
2067 | orig_node = NULL; | |
2068 | rcu_read_unlock(); | |
981d8900 | 2069 | |
7b36e8ee | 2070 | out: |
3d393e47 | 2071 | if (tt_global_entry) |
a513088d | 2072 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 2073 | if (tt_local_entry) |
a513088d | 2074 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 2075 | |
7b36e8ee | 2076 | return orig_node; |
c6c8fea2 | 2077 | } |
a73105b8 | 2078 | |
ced72933 AQ |
2079 | /** |
2080 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2081 | * to the given orig_node | |
2082 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2083 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2084 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2085 | * |
2086 | * This function computes the checksum for the global table corresponding to a | |
2087 | * specific originator. In particular, the checksum is computed as follows: For | |
2088 | * each client connected to the originator the CRC32C of the MAC address and the | |
2089 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2090 | * together. | |
2091 | * | |
2092 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2093 | * produce a unique hash of the table, but since the order which is used to feed | |
2094 | * the CRC32C function affects the result and since every node in the network | |
2095 | * probably sorts the clients differently, the hash function cannot be directly | |
2096 | * computed over the entire table. Hence the CRC32C is used only on | |
2097 | * the single client entry, while all the results are then xor'ed together | |
2098 | * because the XOR operation can combine them all while trying to reduce the | |
2099 | * noise as much as possible. | |
2100 | * | |
2101 | * Returns the checksum of the global table of a given originator. | |
ced72933 | 2102 | */ |
6b5e971a SE |
2103 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2104 | struct batadv_orig_node *orig_node, | |
2105 | unsigned short vid) | |
a73105b8 | 2106 | { |
807736f6 | 2107 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2108 | struct batadv_tt_common_entry *tt_common; |
2109 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2110 | struct hlist_head *head; |
6b5e971a SE |
2111 | u32 i, crc_tmp, crc = 0; |
2112 | u8 flags; | |
a30e22ca | 2113 | __be16 tmp_vid; |
a73105b8 AQ |
2114 | |
2115 | for (i = 0; i < hash->size; i++) { | |
2116 | head = &hash->table[i]; | |
2117 | ||
2118 | rcu_read_lock(); | |
b67bfe0d | 2119 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2120 | tt_global = container_of(tt_common, |
2121 | struct batadv_tt_global_entry, | |
2122 | common); | |
7ea7b4a1 AQ |
2123 | /* compute the CRC only for entries belonging to the |
2124 | * VLAN identified by the vid passed as parameter | |
2125 | */ | |
2126 | if (tt_common->vid != vid) | |
2127 | continue; | |
2128 | ||
db08e6e5 SW |
2129 | /* Roaming clients are in the global table for |
2130 | * consistency only. They don't have to be | |
2131 | * taken into account while computing the | |
2132 | * global crc | |
2133 | */ | |
acd34afa | 2134 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2135 | continue; |
30cfd02b AQ |
2136 | /* Temporary clients have not been announced yet, so |
2137 | * they have to be skipped while computing the global | |
2138 | * crc | |
2139 | */ | |
2140 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2141 | continue; | |
db08e6e5 SW |
2142 | |
2143 | /* find out if this global entry is announced by this | |
2144 | * originator | |
2145 | */ | |
56303d34 | 2146 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2147 | orig_node)) |
db08e6e5 SW |
2148 | continue; |
2149 | ||
a30e22ca AQ |
2150 | /* use network order to read the VID: this ensures that |
2151 | * every node reads the bytes in the same order. | |
2152 | */ | |
2153 | tmp_vid = htons(tt_common->vid); | |
2154 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2155 | |
2156 | /* compute the CRC on flags that have to be kept in sync | |
2157 | * among nodes | |
2158 | */ | |
2159 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2160 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2161 | ||
0ffa9e8d | 2162 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2163 | } |
2164 | rcu_read_unlock(); | |
2165 | } | |
2166 | ||
ced72933 | 2167 | return crc; |
a73105b8 AQ |
2168 | } |
2169 | ||
ced72933 AQ |
2170 | /** |
2171 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2172 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2173 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2174 | * |
2175 | * For details about the computation, please refer to the documentation for | |
2176 | * batadv_tt_global_crc(). | |
2177 | * | |
2178 | * Returns the checksum of the local table | |
ced72933 | 2179 | */ |
6b5e971a SE |
2180 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2181 | unsigned short vid) | |
a73105b8 | 2182 | { |
807736f6 | 2183 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2184 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2185 | struct hlist_head *head; |
6b5e971a SE |
2186 | u32 i, crc_tmp, crc = 0; |
2187 | u8 flags; | |
a30e22ca | 2188 | __be16 tmp_vid; |
a73105b8 AQ |
2189 | |
2190 | for (i = 0; i < hash->size; i++) { | |
2191 | head = &hash->table[i]; | |
2192 | ||
2193 | rcu_read_lock(); | |
b67bfe0d | 2194 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2195 | /* compute the CRC only for entries belonging to the |
2196 | * VLAN identified by vid | |
2197 | */ | |
2198 | if (tt_common->vid != vid) | |
2199 | continue; | |
2200 | ||
058d0e26 | 2201 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2202 | * account while computing the CRC |
2203 | */ | |
acd34afa | 2204 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2205 | continue; |
ced72933 | 2206 | |
a30e22ca AQ |
2207 | /* use network order to read the VID: this ensures that |
2208 | * every node reads the bytes in the same order. | |
2209 | */ | |
2210 | tmp_vid = htons(tt_common->vid); | |
2211 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2212 | |
2213 | /* compute the CRC on flags that have to be kept in sync | |
2214 | * among nodes | |
2215 | */ | |
2216 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2217 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2218 | ||
0ffa9e8d | 2219 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2220 | } |
a73105b8 AQ |
2221 | rcu_read_unlock(); |
2222 | } | |
2223 | ||
ced72933 | 2224 | return crc; |
a73105b8 AQ |
2225 | } |
2226 | ||
56303d34 | 2227 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2228 | { |
7c26a53b ML |
2229 | struct batadv_tt_req_node *node; |
2230 | struct hlist_node *safe; | |
a73105b8 | 2231 | |
807736f6 | 2232 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2233 | |
7c26a53b ML |
2234 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2235 | hlist_del_init(&node->list); | |
a73105b8 AQ |
2236 | kfree(node); |
2237 | } | |
2238 | ||
807736f6 | 2239 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2240 | } |
2241 | ||
56303d34 SE |
2242 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2243 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2244 | const void *tt_buff, |
6b5e971a | 2245 | u16 tt_buff_len) |
a73105b8 | 2246 | { |
a73105b8 | 2247 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2248 | * last OGM (the OGM could carry no changes) |
2249 | */ | |
a73105b8 AQ |
2250 | spin_lock_bh(&orig_node->tt_buff_lock); |
2251 | if (tt_buff_len > 0) { | |
2252 | kfree(orig_node->tt_buff); | |
2253 | orig_node->tt_buff_len = 0; | |
2254 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2255 | if (orig_node->tt_buff) { | |
2256 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2257 | orig_node->tt_buff_len = tt_buff_len; | |
2258 | } | |
2259 | } | |
2260 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2261 | } | |
2262 | ||
56303d34 | 2263 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2264 | { |
7c26a53b ML |
2265 | struct batadv_tt_req_node *node; |
2266 | struct hlist_node *safe; | |
a73105b8 | 2267 | |
807736f6 | 2268 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2269 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2270 | if (batadv_has_timed_out(node->issued_at, |
2271 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2272 | hlist_del_init(&node->list); |
a73105b8 AQ |
2273 | kfree(node); |
2274 | } | |
2275 | } | |
807736f6 | 2276 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2277 | } |
2278 | ||
383b8636 ML |
2279 | /** |
2280 | * batadv_tt_req_node_new - search and possibly create a tt_req_node object | |
2281 | * @bat_priv: the bat priv with all the soft interface information | |
2282 | * @orig_node: orig node this request is being issued for | |
2283 | * | |
2284 | * Returns the pointer to the new tt_req_node struct if no request | |
2285 | * has already been issued for this orig_node, NULL otherwise. | |
9cfc7bd6 | 2286 | */ |
56303d34 | 2287 | static struct batadv_tt_req_node * |
383b8636 | 2288 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2289 | struct batadv_orig_node *orig_node) |
a73105b8 | 2290 | { |
56303d34 | 2291 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2292 | |
807736f6 | 2293 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2294 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2295 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2296 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2297 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2298 | goto unlock; |
2299 | } | |
2300 | ||
2301 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2302 | if (!tt_req_node) | |
2303 | goto unlock; | |
2304 | ||
8fdd0153 | 2305 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2306 | tt_req_node->issued_at = jiffies; |
2307 | ||
7c26a53b | 2308 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2309 | unlock: |
807736f6 | 2310 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2311 | return tt_req_node; |
2312 | } | |
2313 | ||
335fbe0f ML |
2314 | /** |
2315 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2316 | * @entry_ptr: to be checked local tt entry | |
2317 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2318 | * | |
2319 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2320 | */ | |
2321 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2322 | { |
56303d34 | 2323 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2324 | |
acd34afa | 2325 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2326 | return 0; |
2327 | return 1; | |
2328 | } | |
2329 | ||
a513088d SE |
2330 | static int batadv_tt_global_valid(const void *entry_ptr, |
2331 | const void *data_ptr) | |
a73105b8 | 2332 | { |
56303d34 SE |
2333 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2334 | const struct batadv_tt_global_entry *tt_global_entry; | |
2335 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2336 | |
30cfd02b AQ |
2337 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2338 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2339 | return 0; |
2340 | ||
56303d34 SE |
2341 | tt_global_entry = container_of(tt_common_entry, |
2342 | struct batadv_tt_global_entry, | |
48100bac AQ |
2343 | common); |
2344 | ||
a513088d | 2345 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2346 | } |
2347 | ||
335fbe0f | 2348 | /** |
7ea7b4a1 AQ |
2349 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2350 | * specified tt hash | |
335fbe0f ML |
2351 | * @bat_priv: the bat priv with all the soft interface information |
2352 | * @hash: hash table containing the tt entries | |
2353 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2354 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2355 | * @valid_cb: function to filter tt change entries |
2356 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2357 | */ |
7ea7b4a1 AQ |
2358 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2359 | struct batadv_hashtable *hash, | |
6b5e971a | 2360 | void *tvlv_buff, u16 tt_len, |
7ea7b4a1 AQ |
2361 | int (*valid_cb)(const void *, const void *), |
2362 | void *cb_data) | |
a73105b8 | 2363 | { |
56303d34 | 2364 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2365 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2366 | struct hlist_head *head; |
6b5e971a SE |
2367 | u16 tt_tot, tt_num_entries = 0; |
2368 | u32 i; | |
a73105b8 | 2369 | |
298e6e68 | 2370 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2371 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2372 | |
2373 | rcu_read_lock(); | |
2374 | for (i = 0; i < hash->size; i++) { | |
2375 | head = &hash->table[i]; | |
2376 | ||
b67bfe0d | 2377 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2378 | head, hash_entry) { |
335fbe0f | 2379 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2380 | break; |
2381 | ||
48100bac | 2382 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2383 | continue; |
2384 | ||
8fdd0153 | 2385 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2386 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2387 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2388 | memset(tt_change->reserved, 0, |
2389 | sizeof(tt_change->reserved)); | |
a73105b8 | 2390 | |
335fbe0f | 2391 | tt_num_entries++; |
a73105b8 AQ |
2392 | tt_change++; |
2393 | } | |
2394 | } | |
2395 | rcu_read_unlock(); | |
7ea7b4a1 | 2396 | } |
a73105b8 | 2397 | |
7ea7b4a1 AQ |
2398 | /** |
2399 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2400 | * @orig_node: originator for which the CRCs have to be checked | |
2401 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2402 | * @num_vlan: number of tvlv VLAN entries | |
2403 | * @create: if true, create VLAN objects if not found | |
2404 | * | |
2405 | * Return true if all the received CRCs match the locally stored ones, false | |
2406 | * otherwise | |
2407 | */ | |
2408 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2409 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2410 | u16 num_vlan) |
7ea7b4a1 AQ |
2411 | { |
2412 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2413 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2414 | u32 crc; |
7ea7b4a1 AQ |
2415 | int i; |
2416 | ||
2417 | /* check if each received CRC matches the locally stored one */ | |
2418 | for (i = 0; i < num_vlan; i++) { | |
2419 | tt_vlan_tmp = tt_vlan + i; | |
2420 | ||
2421 | /* if orig_node is a backbone node for this VLAN, don't check | |
2422 | * the CRC as we ignore all the global entries over it | |
2423 | */ | |
2424 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2425 | orig_node->orig, |
2426 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2427 | continue; |
2428 | ||
2429 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2430 | ntohs(tt_vlan_tmp->vid)); | |
2431 | if (!vlan) | |
2432 | return false; | |
2433 | ||
91c2b1a9 AQ |
2434 | crc = vlan->tt.crc; |
2435 | batadv_orig_node_vlan_free_ref(vlan); | |
2436 | ||
2437 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2438 | return false; |
2439 | } | |
2440 | ||
2441 | return true; | |
2442 | } | |
2443 | ||
2444 | /** | |
2445 | * batadv_tt_local_update_crc - update all the local CRCs | |
2446 | * @bat_priv: the bat priv with all the soft interface information | |
2447 | */ | |
2448 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2449 | { | |
2450 | struct batadv_softif_vlan *vlan; | |
2451 | ||
2452 | /* recompute the global CRC for each VLAN */ | |
2453 | rcu_read_lock(); | |
2454 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2455 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2456 | } | |
2457 | rcu_read_unlock(); | |
2458 | } | |
2459 | ||
2460 | /** | |
2461 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2462 | * @bat_priv: the bat priv with all the soft interface information | |
2463 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2464 | */ | |
2465 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2466 | struct batadv_orig_node *orig_node) | |
2467 | { | |
2468 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2469 | u32 crc; |
7ea7b4a1 AQ |
2470 | |
2471 | /* recompute the global CRC for each VLAN */ | |
2472 | rcu_read_lock(); | |
d0fa4f3f | 2473 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
2474 | /* if orig_node is a backbone node for this VLAN, don't compute |
2475 | * the CRC as we ignore all the global entries over it | |
2476 | */ | |
cfd4f757 AQ |
2477 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2478 | vlan->vid)) | |
7ea7b4a1 AQ |
2479 | continue; |
2480 | ||
2481 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2482 | vlan->tt.crc = crc; | |
2483 | } | |
2484 | rcu_read_unlock(); | |
a73105b8 AQ |
2485 | } |
2486 | ||
ced72933 AQ |
2487 | /** |
2488 | * batadv_send_tt_request - send a TT Request message to a given node | |
2489 | * @bat_priv: the bat priv with all the soft interface information | |
2490 | * @dst_orig_node: the destination of the message | |
2491 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2492 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2493 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2494 | * @full_table: ask for the entire translation table if true, while only for the |
2495 | * last TT diff otherwise | |
2496 | */ | |
56303d34 SE |
2497 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2498 | struct batadv_orig_node *dst_orig_node, | |
6b5e971a | 2499 | u8 ttvn, |
7ea7b4a1 | 2500 | struct batadv_tvlv_tt_vlan_data *tt_vlan, |
6b5e971a | 2501 | u16 num_vlan, bool full_table) |
a73105b8 | 2502 | { |
335fbe0f | 2503 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2504 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2505 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2506 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2507 | bool ret = false; |
7ea7b4a1 | 2508 | int i, size; |
a73105b8 | 2509 | |
e5d89254 | 2510 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2511 | if (!primary_if) |
2512 | goto out; | |
2513 | ||
2514 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2515 | * reply from the same orig_node yet |
2516 | */ | |
383b8636 | 2517 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
2518 | if (!tt_req_node) |
2519 | goto out; | |
2520 | ||
7ea7b4a1 AQ |
2521 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2522 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2523 | if (!tvlv_tt_data) |
a73105b8 AQ |
2524 | goto out; |
2525 | ||
335fbe0f ML |
2526 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2527 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2528 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2529 | ||
2530 | /* send all the CRCs within the request. This is needed by intermediate | |
2531 | * nodes to ensure they have the correct table before replying | |
2532 | */ | |
2533 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2534 | for (i = 0; i < num_vlan; i++) { | |
2535 | tt_vlan_req->vid = tt_vlan->vid; | |
2536 | tt_vlan_req->crc = tt_vlan->crc; | |
2537 | ||
2538 | tt_vlan_req++; | |
2539 | tt_vlan++; | |
2540 | } | |
a73105b8 AQ |
2541 | |
2542 | if (full_table) | |
335fbe0f | 2543 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2544 | |
bb351ba0 | 2545 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2546 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2547 | |
d69909d2 | 2548 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2549 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2550 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2551 | tvlv_tt_data, size); |
335fbe0f | 2552 | ret = true; |
a73105b8 AQ |
2553 | |
2554 | out: | |
a73105b8 | 2555 | if (primary_if) |
e5d89254 | 2556 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2557 | if (ret && tt_req_node) { |
807736f6 | 2558 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b ML |
2559 | /* hlist_del_init() verifies tt_req_node still is in the list */ |
2560 | hlist_del_init(&tt_req_node->list); | |
807736f6 | 2561 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2562 | kfree(tt_req_node); |
2563 | } | |
335fbe0f | 2564 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2565 | return ret; |
2566 | } | |
2567 | ||
335fbe0f ML |
2568 | /** |
2569 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2570 | * node's translation table | |
2571 | * @bat_priv: the bat priv with all the soft interface information | |
2572 | * @tt_data: tt data containing the tt request information | |
2573 | * @req_src: mac address of tt request sender | |
2574 | * @req_dst: mac address of tt request recipient | |
2575 | * | |
2576 | * Returns true if tt request reply was sent, false otherwise. | |
2577 | */ | |
2578 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2579 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2580 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2581 | { |
170173bf | 2582 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2583 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2584 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2585 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2586 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2587 | bool ret = false, full_table; |
6b5e971a SE |
2588 | u8 orig_ttvn, req_ttvn; |
2589 | u16 tvlv_len; | |
2590 | s32 tt_len; | |
a73105b8 | 2591 | |
39c75a51 | 2592 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2593 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 2594 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 2595 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
2596 | |
2597 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2598 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2599 | if (!req_dst_orig_node) |
2600 | goto out; | |
2601 | ||
335fbe0f | 2602 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2603 | if (!res_dst_orig_node) |
2604 | goto out; | |
2605 | ||
6b5e971a | 2606 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2607 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2608 | |
7ea7b4a1 | 2609 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2610 | /* this node doesn't have the requested data */ |
a73105b8 | 2611 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2612 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2613 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2614 | goto out; |
2615 | ||
015758d0 | 2616 | /* If the full table has been explicitly requested */ |
335fbe0f | 2617 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2618 | !req_dst_orig_node->tt_buff) |
2619 | full_table = true; | |
2620 | else | |
2621 | full_table = false; | |
2622 | ||
335fbe0f ML |
2623 | /* TT fragmentation hasn't been implemented yet, so send as many |
2624 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2625 | */ |
a73105b8 AQ |
2626 | if (!full_table) { |
2627 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2628 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2629 | |
7ea7b4a1 AQ |
2630 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2631 | &tvlv_tt_data, | |
2632 | &tt_change, | |
2633 | &tt_len); | |
2634 | if (!tt_len) | |
a73105b8 AQ |
2635 | goto unlock; |
2636 | ||
a73105b8 | 2637 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2638 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2639 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2640 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2641 | } else { | |
7ea7b4a1 AQ |
2642 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2643 | * in the initial part | |
2644 | */ | |
2645 | tt_len = -1; | |
2646 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2647 | &tvlv_tt_data, | |
2648 | &tt_change, | |
2649 | &tt_len); | |
2650 | if (!tt_len) | |
a73105b8 | 2651 | goto out; |
7ea7b4a1 AQ |
2652 | |
2653 | /* fill the rest of the tvlv with the real TT entries */ | |
2654 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2655 | tt_change, tt_len, | |
2656 | batadv_tt_global_valid, | |
2657 | req_dst_orig_node); | |
a73105b8 AQ |
2658 | } |
2659 | ||
a19d3d85 ML |
2660 | /* Don't send the response, if larger than fragmented packet. */ |
2661 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2662 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2663 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2664 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2665 | res_dst_orig_node->orig); | |
2666 | goto out; | |
2667 | } | |
2668 | ||
335fbe0f ML |
2669 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2670 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2671 | |
2672 | if (full_table) | |
335fbe0f | 2673 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2674 | |
39c75a51 | 2675 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2676 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2677 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2678 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2679 | |
d69909d2 | 2680 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2681 | |
335fbe0f | 2682 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2683 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2684 | tvlv_len); | |
e91ecfc6 | 2685 | |
335fbe0f | 2686 | ret = true; |
a73105b8 AQ |
2687 | goto out; |
2688 | ||
2689 | unlock: | |
2690 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2691 | ||
2692 | out: | |
2693 | if (res_dst_orig_node) | |
7d211efc | 2694 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2695 | if (req_dst_orig_node) |
7d211efc | 2696 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2697 | kfree(tvlv_tt_data); |
a73105b8 | 2698 | return ret; |
a73105b8 | 2699 | } |
96412690 | 2700 | |
335fbe0f ML |
2701 | /** |
2702 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2703 | * translation table | |
2704 | * @bat_priv: the bat priv with all the soft interface information | |
2705 | * @tt_data: tt data containing the tt request information | |
2706 | * @req_src: mac address of tt request sender | |
2707 | * | |
2708 | * Returns true if tt request reply was sent, false otherwise. | |
2709 | */ | |
2710 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2711 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2712 | u8 *req_src) |
a73105b8 | 2713 | { |
335fbe0f | 2714 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2715 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2716 | struct batadv_tvlv_tt_change *tt_change; |
2717 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
2718 | u8 my_ttvn, req_ttvn; |
2719 | u16 tvlv_len; | |
a73105b8 | 2720 | bool full_table; |
6b5e971a | 2721 | s32 tt_len; |
a73105b8 | 2722 | |
39c75a51 | 2723 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2724 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 2725 | req_src, tt_data->ttvn, |
a2f2b6cd | 2726 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2727 | |
a70a9aa9 | 2728 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2729 | |
6b5e971a | 2730 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2731 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2732 | |
335fbe0f | 2733 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2734 | if (!orig_node) |
2735 | goto out; | |
2736 | ||
e5d89254 | 2737 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2738 | if (!primary_if) |
2739 | goto out; | |
2740 | ||
2741 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2742 | * is too big send the whole local translation table |
2743 | */ | |
335fbe0f | 2744 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2745 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2746 | full_table = true; |
2747 | else | |
2748 | full_table = false; | |
2749 | ||
335fbe0f ML |
2750 | /* TT fragmentation hasn't been implemented yet, so send as many |
2751 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2752 | */ |
a73105b8 | 2753 | if (!full_table) { |
807736f6 | 2754 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2755 | |
7ea7b4a1 AQ |
2756 | tt_len = bat_priv->tt.last_changeset_len; |
2757 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2758 | &tvlv_tt_data, | |
2759 | &tt_change, | |
2760 | &tt_len); | |
2761 | if (!tt_len) | |
a73105b8 AQ |
2762 | goto unlock; |
2763 | ||
335fbe0f | 2764 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2765 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2766 | bat_priv->tt.last_changeset_len); |
2767 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2768 | } else { |
6b5e971a | 2769 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2770 | |
7ea7b4a1 AQ |
2771 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2772 | * in the initial part | |
2773 | */ | |
2774 | tt_len = -1; | |
2775 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2776 | &tvlv_tt_data, | |
2777 | &tt_change, | |
2778 | &tt_len); | |
2779 | if (!tt_len) | |
a73105b8 | 2780 | goto out; |
7ea7b4a1 AQ |
2781 | |
2782 | /* fill the rest of the tvlv with the real TT entries */ | |
2783 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2784 | tt_change, tt_len, | |
2785 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2786 | } |
2787 | ||
335fbe0f ML |
2788 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2789 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2790 | |
2791 | if (full_table) | |
335fbe0f | 2792 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2793 | |
39c75a51 | 2794 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2795 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2796 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2797 | |
d69909d2 | 2798 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2799 | |
335fbe0f | 2800 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2801 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2802 | tvlv_len); | |
335fbe0f | 2803 | |
a73105b8 AQ |
2804 | goto out; |
2805 | ||
2806 | unlock: | |
807736f6 | 2807 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2808 | out: |
a70a9aa9 | 2809 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2810 | if (orig_node) |
7d211efc | 2811 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2812 | if (primary_if) |
e5d89254 | 2813 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2814 | kfree(tvlv_tt_data); |
2815 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2816 | return true; |
2817 | } | |
2818 | ||
335fbe0f ML |
2819 | /** |
2820 | * batadv_send_tt_response - send reply to tt request | |
2821 | * @bat_priv: the bat priv with all the soft interface information | |
2822 | * @tt_data: tt data containing the tt request information | |
2823 | * @req_src: mac address of tt request sender | |
2824 | * @req_dst: mac address of tt request recipient | |
2825 | * | |
2826 | * Returns true if tt request reply was sent, false otherwise. | |
2827 | */ | |
2828 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2829 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2830 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2831 | { |
cfd4f757 | 2832 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2833 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
2834 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
2835 | req_dst); | |
a73105b8 AQ |
2836 | } |
2837 | ||
56303d34 SE |
2838 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2839 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2840 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 2841 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
2842 | { |
2843 | int i; | |
a513088d | 2844 | int roams; |
a73105b8 AQ |
2845 | |
2846 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2847 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2848 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2849 | batadv_tt_global_del(bat_priv, orig_node, |
2850 | (tt_change + i)->addr, | |
c018ad3d | 2851 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2852 | "tt removed by changes", |
2853 | roams); | |
08c36d3e | 2854 | } else { |
08c36d3e | 2855 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2856 | (tt_change + i)->addr, |
c018ad3d | 2857 | ntohs((tt_change + i)->vid), |
d4f44692 | 2858 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2859 | /* In case of problem while storing a |
2860 | * global_entry, we stop the updating | |
2861 | * procedure without committing the | |
2862 | * ttvn change. This will avoid to send | |
2863 | * corrupted data on tt_request | |
2864 | */ | |
2865 | return; | |
08c36d3e | 2866 | } |
a73105b8 | 2867 | } |
ac4eebd4 | 2868 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
2869 | } |
2870 | ||
56303d34 | 2871 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 2872 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
2873 | u8 ttvn, u8 *resp_src, |
2874 | u16 num_entries) | |
a73105b8 | 2875 | { |
170173bf | 2876 | struct batadv_orig_node *orig_node; |
a73105b8 | 2877 | |
335fbe0f | 2878 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2879 | if (!orig_node) |
2880 | goto out; | |
2881 | ||
2882 | /* Purge the old table first.. */ | |
95fb130d AQ |
2883 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2884 | "Received full table"); | |
a73105b8 | 2885 | |
7ea7b4a1 AQ |
2886 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2887 | ttvn); | |
a73105b8 AQ |
2888 | |
2889 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2890 | kfree(orig_node->tt_buff); | |
2891 | orig_node->tt_buff_len = 0; | |
2892 | orig_node->tt_buff = NULL; | |
2893 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2894 | ||
7ea7b4a1 | 2895 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2896 | |
2897 | out: | |
2898 | if (orig_node) | |
7d211efc | 2899 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2900 | } |
2901 | ||
56303d34 SE |
2902 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2903 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2904 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 2905 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2906 | { |
a513088d SE |
2907 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2908 | tt_num_changes, ttvn); | |
a73105b8 | 2909 | |
e8cf234a AQ |
2910 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2911 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2912 | atomic_set(&orig_node->last_ttvn, ttvn); |
2913 | } | |
2914 | ||
c018ad3d AQ |
2915 | /** |
2916 | * batadv_is_my_client - check if a client is served by the local node | |
2917 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 2918 | * @addr: the mac address of the client to check |
c018ad3d AQ |
2919 | * @vid: VLAN identifier |
2920 | * | |
2921 | * Returns true if the client is served by this node, false otherwise. | |
2922 | */ | |
6b5e971a | 2923 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 2924 | unsigned short vid) |
a73105b8 | 2925 | { |
170173bf | 2926 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2927 | bool ret = false; |
a73105b8 | 2928 | |
c018ad3d | 2929 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2930 | if (!tt_local_entry) |
2931 | goto out; | |
058d0e26 | 2932 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2933 | * consistency purpose) |
2934 | */ | |
7c1fd91d AQ |
2935 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2936 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2937 | goto out; |
7683fdc1 AQ |
2938 | ret = true; |
2939 | out: | |
a73105b8 | 2940 | if (tt_local_entry) |
a513088d | 2941 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2942 | return ret; |
a73105b8 AQ |
2943 | } |
2944 | ||
335fbe0f ML |
2945 | /** |
2946 | * batadv_handle_tt_response - process incoming tt reply | |
2947 | * @bat_priv: the bat priv with all the soft interface information | |
2948 | * @tt_data: tt data containing the tt request information | |
2949 | * @resp_src: mac address of tt reply sender | |
2950 | * @num_entries: number of tt change entries appended to the tt data | |
2951 | */ | |
2952 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2953 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2954 | u8 *resp_src, u16 num_entries) |
a73105b8 | 2955 | { |
7c26a53b ML |
2956 | struct batadv_tt_req_node *node; |
2957 | struct hlist_node *safe; | |
56303d34 | 2958 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 2959 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
2960 | u8 *tvlv_ptr = (u8 *)tt_data; |
2961 | u16 change_offset; | |
a73105b8 | 2962 | |
39c75a51 | 2963 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2964 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 2965 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 2966 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2967 | |
335fbe0f | 2968 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2969 | if (!orig_node) |
2970 | goto out; | |
2971 | ||
a70a9aa9 AQ |
2972 | spin_lock_bh(&orig_node->tt_lock); |
2973 | ||
7ea7b4a1 AQ |
2974 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2975 | change_offset *= ntohs(tt_data->num_vlan); | |
2976 | change_offset += sizeof(*tt_data); | |
2977 | tvlv_ptr += change_offset; | |
2978 | ||
2979 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2980 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2981 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2982 | resp_src, num_entries); | |
96412690 | 2983 | } else { |
335fbe0f ML |
2984 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2985 | tt_data->ttvn, tt_change); | |
96412690 | 2986 | } |
a73105b8 | 2987 | |
a70a9aa9 | 2988 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2989 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2990 | |
2991 | spin_unlock_bh(&orig_node->tt_lock); | |
2992 | ||
a73105b8 | 2993 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 2994 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2995 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 2996 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 2997 | continue; |
7c26a53b | 2998 | hlist_del_init(&node->list); |
a73105b8 AQ |
2999 | kfree(node); |
3000 | } | |
7ea7b4a1 | 3001 | |
807736f6 | 3002 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3003 | out: |
3004 | if (orig_node) | |
7d211efc | 3005 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
3006 | } |
3007 | ||
56303d34 | 3008 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3009 | { |
56303d34 | 3010 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3011 | |
807736f6 | 3012 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3013 | |
807736f6 | 3014 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
3015 | list_del(&node->list); |
3016 | kfree(node); | |
3017 | } | |
3018 | ||
807736f6 | 3019 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3020 | } |
3021 | ||
56303d34 | 3022 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3023 | { |
56303d34 | 3024 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3025 | |
807736f6 SE |
3026 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3027 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3028 | if (!batadv_has_timed_out(node->first_time, |
3029 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3030 | continue; |
3031 | ||
3032 | list_del(&node->list); | |
3033 | kfree(node); | |
3034 | } | |
807736f6 | 3035 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3036 | } |
3037 | ||
3038 | /* This function checks whether the client already reached the | |
3039 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
3040 | * will not be sent. | |
3041 | * | |
9cfc7bd6 SE |
3042 | * returns true if the ROAMING_ADV can be sent, false otherwise |
3043 | */ | |
6b5e971a | 3044 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3045 | { |
56303d34 | 3046 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3047 | bool ret = false; |
3048 | ||
807736f6 | 3049 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3050 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3051 | * reply from the same orig_node yet |
3052 | */ | |
807736f6 | 3053 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3054 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3055 | continue; |
3056 | ||
1eda58bf | 3057 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3058 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3059 | continue; |
3060 | ||
3e34819e | 3061 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3062 | /* Sorry, you roamed too many times! */ |
3063 | goto unlock; | |
3064 | ret = true; | |
3065 | break; | |
3066 | } | |
3067 | ||
3068 | if (!ret) { | |
3069 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
3070 | if (!tt_roam_node) | |
3071 | goto unlock; | |
3072 | ||
3073 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3074 | atomic_set(&tt_roam_node->counter, |
3075 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3076 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3077 | |
807736f6 | 3078 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3079 | ret = true; |
3080 | } | |
3081 | ||
3082 | unlock: | |
807736f6 | 3083 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3084 | return ret; |
3085 | } | |
3086 | ||
c018ad3d AQ |
3087 | /** |
3088 | * batadv_send_roam_adv - send a roaming advertisement message | |
3089 | * @bat_priv: the bat priv with all the soft interface information | |
3090 | * @client: mac address of the roaming client | |
3091 | * @vid: VLAN identifier | |
3092 | * @orig_node: message destination | |
3093 | * | |
3094 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3095 | * client. This is done to inform the node that from now on all traffic destined | |
3096 | * for this particular roamed client has to be forwarded to the sender of the | |
3097 | * roaming message. | |
3098 | */ | |
6b5e971a | 3099 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3100 | unsigned short vid, |
56303d34 | 3101 | struct batadv_orig_node *orig_node) |
cc47f66e | 3102 | { |
56303d34 | 3103 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3104 | struct batadv_tvlv_roam_adv tvlv_roam; |
3105 | ||
3106 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3107 | if (!primary_if) | |
3108 | goto out; | |
cc47f66e AQ |
3109 | |
3110 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3111 | * already roamed to us too many times |
3112 | */ | |
a513088d | 3113 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3114 | goto out; |
3115 | ||
39c75a51 | 3116 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3117 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3118 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3119 | |
d69909d2 | 3120 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3121 | |
122edaa0 | 3122 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3123 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3124 | |
3125 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3126 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3127 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3128 | |
3129 | out: | |
122edaa0 ML |
3130 | if (primary_if) |
3131 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
3132 | } |
3133 | ||
a513088d | 3134 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3135 | { |
56303d34 | 3136 | struct delayed_work *delayed_work; |
807736f6 | 3137 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3138 | struct batadv_priv *bat_priv; |
3139 | ||
3140 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3141 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3142 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3143 | |
a19d3d85 | 3144 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3145 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3146 | batadv_tt_req_purge(bat_priv); |
3147 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3148 | |
72414442 AQ |
3149 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3150 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3151 | } |
cc47f66e | 3152 | |
56303d34 | 3153 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3154 | { |
e1bf0c14 ML |
3155 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3156 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3157 | ||
807736f6 | 3158 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3159 | |
a513088d SE |
3160 | batadv_tt_local_table_free(bat_priv); |
3161 | batadv_tt_global_table_free(bat_priv); | |
3162 | batadv_tt_req_list_free(bat_priv); | |
3163 | batadv_tt_changes_list_free(bat_priv); | |
3164 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3165 | |
807736f6 | 3166 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3167 | } |
058d0e26 | 3168 | |
7ea7b4a1 AQ |
3169 | /** |
3170 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3171 | * table and possibly count them in the TT size | |
3172 | * @bat_priv: the bat priv with all the soft interface information | |
3173 | * @flags: the flag to switch | |
3174 | * @enable: whether to set or unset the flag | |
3175 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3176 | */ |
6b5e971a SE |
3177 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3178 | bool enable, bool count) | |
058d0e26 | 3179 | { |
7ea7b4a1 AQ |
3180 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3181 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 3182 | u16 changed_num = 0; |
058d0e26 | 3183 | struct hlist_head *head; |
6b5e971a | 3184 | u32 i; |
058d0e26 AQ |
3185 | |
3186 | if (!hash) | |
7ea7b4a1 | 3187 | return; |
058d0e26 AQ |
3188 | |
3189 | for (i = 0; i < hash->size; i++) { | |
3190 | head = &hash->table[i]; | |
3191 | ||
3192 | rcu_read_lock(); | |
b67bfe0d | 3193 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3194 | head, hash_entry) { |
697f2531 AQ |
3195 | if (enable) { |
3196 | if ((tt_common_entry->flags & flags) == flags) | |
3197 | continue; | |
3198 | tt_common_entry->flags |= flags; | |
3199 | } else { | |
3200 | if (!(tt_common_entry->flags & flags)) | |
3201 | continue; | |
3202 | tt_common_entry->flags &= ~flags; | |
3203 | } | |
3204 | changed_num++; | |
7ea7b4a1 AQ |
3205 | |
3206 | if (!count) | |
3207 | continue; | |
3208 | ||
3209 | batadv_tt_local_size_inc(bat_priv, | |
3210 | tt_common_entry->vid); | |
058d0e26 AQ |
3211 | } |
3212 | rcu_read_unlock(); | |
3213 | } | |
058d0e26 AQ |
3214 | } |
3215 | ||
acd34afa | 3216 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3217 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3218 | { |
807736f6 | 3219 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3220 | struct batadv_tt_common_entry *tt_common; |
3221 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 3222 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 3223 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3224 | struct hlist_head *head; |
3225 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3226 | u32 i; |
058d0e26 AQ |
3227 | |
3228 | if (!hash) | |
3229 | return; | |
3230 | ||
3231 | for (i = 0; i < hash->size; i++) { | |
3232 | head = &hash->table[i]; | |
3233 | list_lock = &hash->list_locks[i]; | |
3234 | ||
3235 | spin_lock_bh(list_lock); | |
b67bfe0d | 3236 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3237 | hash_entry) { |
3238 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3239 | continue; |
3240 | ||
39c75a51 | 3241 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3242 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3243 | tt_common->addr, | |
3244 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3245 | |
7ea7b4a1 | 3246 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3247 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3248 | tt_local = container_of(tt_common, |
3249 | struct batadv_tt_local_entry, | |
3250 | common); | |
35df3b29 AQ |
3251 | |
3252 | /* decrease the reference held for this vlan */ | |
3253 | vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid); | |
354136bc ML |
3254 | if (vlan) { |
3255 | batadv_softif_vlan_free_ref(vlan); | |
3256 | batadv_softif_vlan_free_ref(vlan); | |
3257 | } | |
35df3b29 | 3258 | |
56303d34 | 3259 | batadv_tt_local_entry_free_ref(tt_local); |
058d0e26 AQ |
3260 | } |
3261 | spin_unlock_bh(list_lock); | |
3262 | } | |
058d0e26 AQ |
3263 | } |
3264 | ||
e1bf0c14 | 3265 | /** |
a19d3d85 ML |
3266 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3267 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3268 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3269 | * |
3270 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3271 | */ |
a19d3d85 | 3272 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3273 | { |
5274cd68 SE |
3274 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3275 | ||
c5caf4ef LL |
3276 | /* Update multicast addresses in local translation table */ |
3277 | batadv_mcast_mla_update(bat_priv); | |
3278 | ||
e1bf0c14 ML |
3279 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3280 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3281 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3282 | return; |
e1bf0c14 | 3283 | } |
be9aa4c1 | 3284 | |
7ea7b4a1 | 3285 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3286 | |
a513088d | 3287 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3288 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3289 | |
3290 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3291 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3292 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3293 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3294 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3295 | |
3296 | /* reset the sending counter */ | |
807736f6 | 3297 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3298 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3299 | } |
a70a9aa9 | 3300 | |
a19d3d85 ML |
3301 | /** |
3302 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3303 | * have been queued in the time since the last commit | |
3304 | * @bat_priv: the bat priv with all the soft interface information | |
3305 | */ | |
3306 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3307 | { | |
3308 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3309 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3310 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3311 | } |
59b699cd | 3312 | |
6b5e971a SE |
3313 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3314 | unsigned short vid) | |
59b699cd | 3315 | { |
56303d34 SE |
3316 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3317 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3318 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3319 | bool ret = false; |
59b699cd | 3320 | |
b8cbd81d AQ |
3321 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3322 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3323 | goto out; |
59b699cd | 3324 | |
b8cbd81d | 3325 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3326 | if (!tt_local_entry) |
3327 | goto out; | |
3328 | ||
b8cbd81d | 3329 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3330 | if (!tt_global_entry) |
3331 | goto out; | |
3332 | ||
1f129fef | 3333 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3334 | goto out; |
3335 | ||
5870adc6 | 3336 | ret = true; |
59b699cd AQ |
3337 | |
3338 | out: | |
b8cbd81d AQ |
3339 | if (vlan) |
3340 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3341 | if (tt_global_entry) |
a513088d | 3342 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3343 | if (tt_local_entry) |
a513088d | 3344 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3345 | return ret; |
3346 | } | |
a943cac1 | 3347 | |
e1bf0c14 ML |
3348 | /** |
3349 | * batadv_tt_update_orig - update global translation table with new tt | |
3350 | * information received via ogms | |
3351 | * @bat_priv: the bat priv with all the soft interface information | |
3352 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3353 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3354 | * @tt_num_vlan: number of tvlv VLAN entries | |
3355 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3356 | * @tt_num_changes: number of tt changes inside the tt buffer |
3357 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3358 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3359 | */ |
3360 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3361 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3362 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3363 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3364 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3365 | { |
6b5e971a | 3366 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3367 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3368 | bool full_table = true; |
e17931d1 | 3369 | bool has_tt_init; |
a943cac1 | 3370 | |
7ea7b4a1 | 3371 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3372 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3373 | &orig_node->capa_initialized); | |
e17931d1 | 3374 | |
17071578 | 3375 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3376 | * increased by one -> we can apply the attached changes |
3377 | */ | |
e17931d1 | 3378 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3379 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3380 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3381 | * times. | |
9cfc7bd6 SE |
3382 | * In this case send a tt request |
3383 | */ | |
a943cac1 ML |
3384 | if (!tt_num_changes) { |
3385 | full_table = false; | |
3386 | goto request_table; | |
3387 | } | |
3388 | ||
a70a9aa9 AQ |
3389 | spin_lock_bh(&orig_node->tt_lock); |
3390 | ||
a513088d | 3391 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3392 | ttvn, tt_change); |
a943cac1 ML |
3393 | |
3394 | /* Even if we received the precomputed crc with the OGM, we | |
3395 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3396 | * in the global table |
3397 | */ | |
7ea7b4a1 | 3398 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3399 | |
a70a9aa9 AQ |
3400 | spin_unlock_bh(&orig_node->tt_lock); |
3401 | ||
a943cac1 ML |
3402 | /* The ttvn alone is not enough to guarantee consistency |
3403 | * because a single value could represent different states | |
3404 | * (due to the wrap around). Thus a node has to check whether | |
3405 | * the resulting table (after applying the changes) is still | |
3406 | * consistent or not. E.g. a node could disconnect while its | |
3407 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3408 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3409 | * inconsistency |
3410 | */ | |
7ea7b4a1 AQ |
3411 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3412 | tt_num_vlan)) | |
a943cac1 | 3413 | goto request_table; |
a943cac1 ML |
3414 | } else { |
3415 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3416 | * in sync anymore -> request fresh tt data |
3417 | */ | |
e17931d1 | 3418 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3419 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3420 | tt_num_vlan)) { | |
a943cac1 | 3421 | request_table: |
39c75a51 | 3422 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3423 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3424 | orig_node->orig, ttvn, orig_ttvn, | |
3425 | tt_num_changes); | |
a513088d | 3426 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3427 | tt_vlan, tt_num_vlan, |
3428 | full_table); | |
a943cac1 ML |
3429 | return; |
3430 | } | |
3431 | } | |
3432 | } | |
3275e7cc | 3433 | |
c018ad3d AQ |
3434 | /** |
3435 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3436 | * @bat_priv: the bat priv with all the soft interface information | |
3437 | * @addr: the mac address of the client to check | |
3438 | * @vid: VLAN identifier | |
3439 | * | |
3440 | * Returns true if we know that the client has moved from its old originator | |
3441 | * to another one. This entry is still kept for consistency purposes and will be | |
3442 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3443 | */ |
56303d34 | 3444 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 3445 | u8 *addr, unsigned short vid) |
3275e7cc | 3446 | { |
56303d34 | 3447 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3448 | bool ret = false; |
3449 | ||
c018ad3d | 3450 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3451 | if (!tt_global_entry) |
3452 | goto out; | |
3453 | ||
c1d07431 | 3454 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3455 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3456 | out: |
3457 | return ret; | |
3458 | } | |
30cfd02b | 3459 | |
7c1fd91d AQ |
3460 | /** |
3461 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3462 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3463 | * @addr: the mac address of the local client to query |
3464 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3465 | * |
3466 | * Returns true if the local client is known to be roaming (it is not served by | |
3467 | * this node anymore) or not. If yes, the client is still present in the table | |
3468 | * to keep the latter consistent with the node TTVN | |
3469 | */ | |
3470 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 3471 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
3472 | { |
3473 | struct batadv_tt_local_entry *tt_local_entry; | |
3474 | bool ret = false; | |
3475 | ||
c018ad3d | 3476 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3477 | if (!tt_local_entry) |
3478 | goto out; | |
3479 | ||
3480 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3481 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3482 | out: | |
3483 | return ret; | |
7c1fd91d AQ |
3484 | } |
3485 | ||
30cfd02b AQ |
3486 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3487 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3488 | const unsigned char *addr, |
16052789 | 3489 | unsigned short vid) |
30cfd02b AQ |
3490 | { |
3491 | bool ret = false; | |
3492 | ||
16052789 | 3493 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3494 | BATADV_TT_CLIENT_TEMP, |
3495 | atomic_read(&orig_node->last_ttvn))) | |
3496 | goto out; | |
3497 | ||
3498 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3499 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3500 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3501 | ret = true; |
3502 | out: | |
3503 | return ret; | |
3504 | } | |
e1bf0c14 | 3505 | |
a19d3d85 ML |
3506 | /** |
3507 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3508 | * maximum packet size that can be transported through the mesh | |
3509 | * @soft_iface: netdev struct of the mesh interface | |
3510 | * | |
3511 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3512 | * to be removed. | |
3513 | */ | |
3514 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3515 | { | |
3516 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3517 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3518 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3519 | bool reduced = false; | |
3520 | ||
3521 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3522 | ||
3523 | while (true) { | |
3524 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3525 | if (packet_size_max >= table_size) | |
3526 | break; | |
3527 | ||
3528 | batadv_tt_local_purge(bat_priv, timeout); | |
3529 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3530 | ||
3531 | timeout /= 2; | |
3532 | reduced = true; | |
3533 | net_ratelimited_function(batadv_info, soft_iface, | |
3534 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3535 | packet_size_max); | |
3536 | } | |
3537 | ||
3538 | /* commit these changes immediately, to avoid synchronization problem | |
3539 | * with the TTVN | |
3540 | */ | |
3541 | if (reduced) | |
3542 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3543 | ||
3544 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3545 | } | |
3546 | ||
e1bf0c14 ML |
3547 | /** |
3548 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3549 | * @bat_priv: the bat priv with all the soft interface information | |
3550 | * @orig: the orig_node of the ogm | |
3551 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3552 | * @tvlv_value: tvlv buffer containing the gateway data | |
3553 | * @tvlv_value_len: tvlv buffer length | |
3554 | */ | |
3555 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3556 | struct batadv_orig_node *orig, | |
6b5e971a SE |
3557 | u8 flags, void *tvlv_value, |
3558 | u16 tvlv_value_len) | |
e1bf0c14 | 3559 | { |
7ea7b4a1 AQ |
3560 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3561 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3562 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 3563 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
3564 | |
3565 | if (tvlv_value_len < sizeof(*tt_data)) | |
3566 | return; | |
3567 | ||
3568 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3569 | tvlv_value_len -= sizeof(*tt_data); | |
3570 | ||
7ea7b4a1 AQ |
3571 | num_vlan = ntohs(tt_data->num_vlan); |
3572 | ||
3573 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3574 | return; | |
3575 | ||
3576 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3577 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3578 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3579 | ||
298e6e68 | 3580 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3581 | |
7ea7b4a1 AQ |
3582 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3583 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3584 | } |
3585 | ||
335fbe0f ML |
3586 | /** |
3587 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3588 | * container | |
3589 | * @bat_priv: the bat priv with all the soft interface information | |
3590 | * @src: mac address of tt tvlv sender | |
3591 | * @dst: mac address of tt tvlv recipient | |
3592 | * @tvlv_value: tvlv buffer containing the tt data | |
3593 | * @tvlv_value_len: tvlv buffer length | |
3594 | * | |
3595 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3596 | * otherwise. | |
3597 | */ | |
3598 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3599 | u8 *src, u8 *dst, |
335fbe0f | 3600 | void *tvlv_value, |
6b5e971a | 3601 | u16 tvlv_value_len) |
335fbe0f ML |
3602 | { |
3603 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 3604 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3605 | char tt_flag; |
3606 | bool ret; | |
3607 | ||
3608 | if (tvlv_value_len < sizeof(*tt_data)) | |
3609 | return NET_RX_SUCCESS; | |
3610 | ||
3611 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3612 | tvlv_value_len -= sizeof(*tt_data); | |
3613 | ||
7ea7b4a1 AQ |
3614 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3615 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3616 | ||
3617 | if (tvlv_value_len < tt_vlan_len) | |
3618 | return NET_RX_SUCCESS; | |
3619 | ||
3620 | tvlv_value_len -= tt_vlan_len; | |
3621 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3622 | |
3623 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3624 | case BATADV_TT_REQUEST: | |
3625 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3626 | ||
3627 | /* If this node cannot provide a TT response the tt_request is | |
3628 | * forwarded | |
3629 | */ | |
3630 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3631 | if (!ret) { | |
3632 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3633 | tt_flag = 'F'; | |
3634 | else | |
3635 | tt_flag = '.'; | |
3636 | ||
3637 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3638 | "Routing TT_REQUEST to %pM [%c]\n", | |
3639 | dst, tt_flag); | |
3640 | /* tvlv API will re-route the packet */ | |
3641 | return NET_RX_DROP; | |
3642 | } | |
3643 | break; | |
3644 | case BATADV_TT_RESPONSE: | |
3645 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3646 | ||
3647 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3648 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3649 | src, tt_num_entries); |
335fbe0f ML |
3650 | return NET_RX_SUCCESS; |
3651 | } | |
3652 | ||
3653 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3654 | tt_flag = 'F'; | |
3655 | else | |
3656 | tt_flag = '.'; | |
3657 | ||
3658 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3659 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3660 | ||
3661 | /* tvlv API will re-route the packet */ | |
3662 | return NET_RX_DROP; | |
3663 | } | |
3664 | ||
3665 | return NET_RX_SUCCESS; | |
3666 | } | |
3667 | ||
122edaa0 ML |
3668 | /** |
3669 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3670 | * @bat_priv: the bat priv with all the soft interface information | |
3671 | * @src: mac address of tt tvlv sender | |
3672 | * @dst: mac address of tt tvlv recipient | |
3673 | * @tvlv_value: tvlv buffer containing the tt data | |
3674 | * @tvlv_value_len: tvlv buffer length | |
3675 | * | |
3676 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3677 | * otherwise. | |
3678 | */ | |
3679 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3680 | u8 *src, u8 *dst, |
122edaa0 | 3681 | void *tvlv_value, |
6b5e971a | 3682 | u16 tvlv_value_len) |
122edaa0 ML |
3683 | { |
3684 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3685 | struct batadv_orig_node *orig_node = NULL; | |
3686 | ||
3687 | /* If this node is not the intended recipient of the | |
3688 | * roaming advertisement the packet is forwarded | |
3689 | * (the tvlv API will re-route the packet). | |
3690 | */ | |
3691 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3692 | return NET_RX_DROP; | |
3693 | ||
122edaa0 ML |
3694 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3695 | goto out; | |
3696 | ||
3697 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3698 | if (!orig_node) | |
3699 | goto out; | |
3700 | ||
3701 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3702 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3703 | ||
3704 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3705 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3706 | src, roaming_adv->client); | |
3707 | ||
3708 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3709 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3710 | atomic_read(&orig_node->last_ttvn) + 1); |
3711 | ||
3712 | out: | |
3713 | if (orig_node) | |
3714 | batadv_orig_node_free_ref(orig_node); | |
3715 | return NET_RX_SUCCESS; | |
3716 | } | |
3717 | ||
e1bf0c14 ML |
3718 | /** |
3719 | * batadv_tt_init - initialise the translation table internals | |
3720 | * @bat_priv: the bat priv with all the soft interface information | |
3721 | * | |
3722 | * Return 0 on success or negative error number in case of failure. | |
3723 | */ | |
3724 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3725 | { | |
3726 | int ret; | |
3727 | ||
0eb01568 AQ |
3728 | /* synchronized flags must be remote */ |
3729 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3730 | ||
e1bf0c14 ML |
3731 | ret = batadv_tt_local_init(bat_priv); |
3732 | if (ret < 0) | |
3733 | return ret; | |
3734 | ||
3735 | ret = batadv_tt_global_init(bat_priv); | |
3736 | if (ret < 0) | |
3737 | return ret; | |
3738 | ||
3739 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3740 | batadv_tt_tvlv_unicast_handler_v1, |
3741 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3742 | |
122edaa0 ML |
3743 | batadv_tvlv_handler_register(bat_priv, NULL, |
3744 | batadv_roam_tvlv_unicast_handler_v1, | |
3745 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3746 | ||
e1bf0c14 ML |
3747 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3748 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3749 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3750 | ||
3751 | return 1; | |
3752 | } | |
42cb0bef AQ |
3753 | |
3754 | /** | |
3755 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3756 | * @bat_priv: the bat priv with all the soft interface information | |
3757 | * @addr: the mac address of the client | |
3758 | * @vid: the identifier of the VLAN where this client is connected | |
3759 | * | |
3760 | * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false | |
3761 | * otherwise | |
3762 | */ | |
3763 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 3764 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
3765 | { |
3766 | struct batadv_tt_global_entry *tt; | |
3767 | bool ret; | |
3768 | ||
3769 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3770 | if (!tt) | |
3771 | return false; | |
3772 | ||
3773 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3774 | ||
3775 | batadv_tt_global_entry_free_ref(tt); | |
3776 | ||
3777 | return ret; | |
3778 | } |