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0046b040 | 1 | /* Copyright (C) 2007-2016 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> | |
86452f81 | 25 | #include <linux/cache.h> |
1e2c2a4f SE |
26 | #include <linux/compiler.h> |
27 | #include <linux/crc32c.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/etherdevice.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/if_ether.h> | |
86452f81 | 32 | #include <linux/init.h> |
1e2c2a4f SE |
33 | #include <linux/jhash.h> |
34 | #include <linux/jiffies.h> | |
35 | #include <linux/kernel.h> | |
6e8ef69d | 36 | #include <linux/kref.h> |
1e2c2a4f SE |
37 | #include <linux/list.h> |
38 | #include <linux/lockdep.h> | |
39 | #include <linux/netdevice.h> | |
d34f0550 | 40 | #include <linux/netlink.h> |
1e2c2a4f SE |
41 | #include <linux/rculist.h> |
42 | #include <linux/rcupdate.h> | |
43 | #include <linux/seq_file.h> | |
d34f0550 | 44 | #include <linux/skbuff.h> |
1e2c2a4f SE |
45 | #include <linux/slab.h> |
46 | #include <linux/spinlock.h> | |
47 | #include <linux/stddef.h> | |
48 | #include <linux/string.h> | |
49 | #include <linux/workqueue.h> | |
d34f0550 MS |
50 | #include <net/genetlink.h> |
51 | #include <net/netlink.h> | |
52 | #include <net/sock.h> | |
53 | #include <uapi/linux/batman_adv.h> | |
1e2c2a4f SE |
54 | |
55 | #include "bridge_loop_avoidance.h" | |
32ae9b22 | 56 | #include "hard-interface.h" |
c6c8fea2 | 57 | #include "hash.h" |
ba412080 | 58 | #include "log.h" |
d34f0550 | 59 | #include "netlink.h" |
1e2c2a4f SE |
60 | #include "originator.h" |
61 | #include "packet.h" | |
62 | #include "soft-interface.h" | |
1f8dce49 | 63 | #include "tvlv.h" |
a73105b8 | 64 | |
86452f81 SE |
65 | static struct kmem_cache *batadv_tl_cache __read_mostly; |
66 | static struct kmem_cache *batadv_tg_cache __read_mostly; | |
67 | static struct kmem_cache *batadv_tt_orig_cache __read_mostly; | |
68 | static struct kmem_cache *batadv_tt_change_cache __read_mostly; | |
69 | static struct kmem_cache *batadv_tt_req_cache __read_mostly; | |
70 | static struct kmem_cache *batadv_tt_roam_cache __read_mostly; | |
71 | ||
dec05074 AQ |
72 | /* hash class keys */ |
73 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
74 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
75 | ||
6b5e971a | 76 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 77 | unsigned short vid, |
56303d34 | 78 | struct batadv_orig_node *orig_node); |
a513088d SE |
79 | static void batadv_tt_purge(struct work_struct *work); |
80 | static void | |
56303d34 | 81 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
82 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
83 | struct batadv_orig_node *orig_node, | |
84 | const unsigned char *addr, | |
c018ad3d AQ |
85 | unsigned short vid, const char *message, |
86 | bool roaming); | |
c6c8fea2 | 87 | |
62fe710f | 88 | /** |
d15cd622 AQ |
89 | * batadv_compare_tt - check if two TT entries are the same |
90 | * @node: the list element pointer of the first TT entry | |
91 | * @data2: pointer to the tt_common_entry of the second TT entry | |
62fe710f | 92 | * |
d15cd622 AQ |
93 | * Compare the MAC address and the VLAN ID of the two TT entries and check if |
94 | * they are the same TT client. | |
4b426b10 | 95 | * Return: true if the two TT clients are the same, false otherwise |
62fe710f | 96 | */ |
4b426b10 | 97 | static bool batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 98 | { |
56303d34 | 99 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 100 | hash_entry); |
4c718958 ML |
101 | const struct batadv_tt_common_entry *tt1 = data1; |
102 | const struct batadv_tt_common_entry *tt2 = data2; | |
7aadf889 | 103 | |
4c718958 | 104 | return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2); |
7aadf889 ML |
105 | } |
106 | ||
c018ad3d AQ |
107 | /** |
108 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
109 | * @data: pointer to the tt_common_entry object to map | |
110 | * @size: the size of the hash table | |
111 | * | |
62fe710f | 112 | * Return: the hash index where the object represented by 'data' should be |
c018ad3d AQ |
113 | * stored at. |
114 | */ | |
6b5e971a | 115 | static inline u32 batadv_choose_tt(const void *data, u32 size) |
c018ad3d AQ |
116 | { |
117 | struct batadv_tt_common_entry *tt; | |
6b5e971a | 118 | u32 hash = 0; |
c018ad3d AQ |
119 | |
120 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
121 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
122 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
123 | |
124 | return hash % size; | |
125 | } | |
126 | ||
127 | /** | |
128 | * batadv_tt_hash_find - look for a client in the given hash table | |
129 | * @hash: the hash table to search | |
130 | * @addr: the mac address of the client to look for | |
131 | * @vid: VLAN identifier | |
132 | * | |
62fe710f | 133 | * Return: a pointer to the tt_common struct belonging to the searched client if |
c018ad3d AQ |
134 | * found, NULL otherwise. |
135 | */ | |
56303d34 | 136 | static struct batadv_tt_common_entry * |
6b5e971a | 137 | batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr, |
c018ad3d | 138 | unsigned short vid) |
7aadf889 | 139 | { |
7aadf889 | 140 | struct hlist_head *head; |
c018ad3d | 141 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
6b5e971a | 142 | u32 index; |
7aadf889 ML |
143 | |
144 | if (!hash) | |
145 | return NULL; | |
146 | ||
8fdd0153 | 147 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
148 | to_search.vid = vid; |
149 | ||
150 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
151 | head = &hash->table[index]; |
152 | ||
153 | rcu_read_lock(); | |
c018ad3d AQ |
154 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
155 | if (!batadv_compare_eth(tt, addr)) | |
156 | continue; | |
157 | ||
158 | if (tt->vid != vid) | |
7aadf889 ML |
159 | continue; |
160 | ||
92dcdf09 | 161 | if (!kref_get_unless_zero(&tt->refcount)) |
7683fdc1 AQ |
162 | continue; |
163 | ||
c018ad3d | 164 | tt_tmp = tt; |
7aadf889 ML |
165 | break; |
166 | } | |
167 | rcu_read_unlock(); | |
168 | ||
c018ad3d | 169 | return tt_tmp; |
7aadf889 ML |
170 | } |
171 | ||
c018ad3d AQ |
172 | /** |
173 | * batadv_tt_local_hash_find - search the local table for a given client | |
174 | * @bat_priv: the bat priv with all the soft interface information | |
175 | * @addr: the mac address of the client to look for | |
176 | * @vid: VLAN identifier | |
177 | * | |
62fe710f | 178 | * Return: a pointer to the corresponding tt_local_entry struct if the client is |
c018ad3d AQ |
179 | * found, NULL otherwise. |
180 | */ | |
56303d34 | 181 | static struct batadv_tt_local_entry * |
6b5e971a | 182 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 183 | unsigned short vid) |
7aadf889 | 184 | { |
56303d34 SE |
185 | struct batadv_tt_common_entry *tt_common_entry; |
186 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 187 | |
c018ad3d AQ |
188 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
189 | vid); | |
48100bac AQ |
190 | if (tt_common_entry) |
191 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
192 | struct batadv_tt_local_entry, |
193 | common); | |
48100bac AQ |
194 | return tt_local_entry; |
195 | } | |
7aadf889 | 196 | |
c018ad3d AQ |
197 | /** |
198 | * batadv_tt_global_hash_find - search the global table for a given client | |
199 | * @bat_priv: the bat priv with all the soft interface information | |
200 | * @addr: the mac address of the client to look for | |
201 | * @vid: VLAN identifier | |
202 | * | |
62fe710f | 203 | * Return: a pointer to the corresponding tt_global_entry struct if the client |
c018ad3d AQ |
204 | * is found, NULL otherwise. |
205 | */ | |
56303d34 | 206 | static struct batadv_tt_global_entry * |
6b5e971a | 207 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 208 | unsigned short vid) |
48100bac | 209 | { |
56303d34 SE |
210 | struct batadv_tt_common_entry *tt_common_entry; |
211 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 212 | |
c018ad3d AQ |
213 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
214 | vid); | |
48100bac AQ |
215 | if (tt_common_entry) |
216 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
217 | struct batadv_tt_global_entry, |
218 | common); | |
48100bac | 219 | return tt_global_entry; |
7aadf889 ML |
220 | } |
221 | ||
86452f81 SE |
222 | /** |
223 | * batadv_tt_local_entry_free_rcu - free the tt_local_entry | |
224 | * @rcu: rcu pointer of the tt_local_entry | |
225 | */ | |
226 | static void batadv_tt_local_entry_free_rcu(struct rcu_head *rcu) | |
227 | { | |
228 | struct batadv_tt_local_entry *tt_local_entry; | |
229 | ||
230 | tt_local_entry = container_of(rcu, struct batadv_tt_local_entry, | |
231 | common.rcu); | |
232 | ||
233 | kmem_cache_free(batadv_tl_cache, tt_local_entry); | |
234 | } | |
235 | ||
92dcdf09 SE |
236 | /** |
237 | * batadv_tt_local_entry_release - release tt_local_entry from lists and queue | |
238 | * for free after rcu grace period | |
239 | * @ref: kref pointer of the nc_node | |
240 | */ | |
241 | static void batadv_tt_local_entry_release(struct kref *ref) | |
242 | { | |
243 | struct batadv_tt_local_entry *tt_local_entry; | |
244 | ||
245 | tt_local_entry = container_of(ref, struct batadv_tt_local_entry, | |
246 | common.refcount); | |
247 | ||
a33d970d SE |
248 | batadv_softif_vlan_put(tt_local_entry->vlan); |
249 | ||
86452f81 | 250 | call_rcu(&tt_local_entry->common.rcu, batadv_tt_local_entry_free_rcu); |
92dcdf09 SE |
251 | } |
252 | ||
253 | /** | |
95c0db90 | 254 | * batadv_tt_local_entry_put - decrement the tt_local_entry refcounter and |
92dcdf09 SE |
255 | * possibly release it |
256 | * @tt_local_entry: tt_local_entry to be free'd | |
257 | */ | |
a513088d | 258 | static void |
95c0db90 | 259 | batadv_tt_local_entry_put(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 260 | { |
92dcdf09 SE |
261 | kref_put(&tt_local_entry->common.refcount, |
262 | batadv_tt_local_entry_release); | |
7683fdc1 AQ |
263 | } |
264 | ||
86452f81 SE |
265 | /** |
266 | * batadv_tt_global_entry_free_rcu - free the tt_global_entry | |
267 | * @rcu: rcu pointer of the tt_global_entry | |
268 | */ | |
269 | static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu) | |
270 | { | |
271 | struct batadv_tt_global_entry *tt_global_entry; | |
272 | ||
273 | tt_global_entry = container_of(rcu, struct batadv_tt_global_entry, | |
274 | common.rcu); | |
275 | ||
276 | kmem_cache_free(batadv_tg_cache, tt_global_entry); | |
277 | } | |
278 | ||
21026059 | 279 | /** |
92dcdf09 SE |
280 | * batadv_tt_global_entry_release - release tt_global_entry from lists and queue |
281 | * for free after rcu grace period | |
282 | * @ref: kref pointer of the nc_node | |
283 | */ | |
284 | static void batadv_tt_global_entry_release(struct kref *ref) | |
285 | { | |
286 | struct batadv_tt_global_entry *tt_global_entry; | |
287 | ||
288 | tt_global_entry = container_of(ref, struct batadv_tt_global_entry, | |
289 | common.refcount); | |
290 | ||
291 | batadv_tt_global_del_orig_list(tt_global_entry); | |
86452f81 SE |
292 | |
293 | call_rcu(&tt_global_entry->common.rcu, batadv_tt_global_entry_free_rcu); | |
92dcdf09 SE |
294 | } |
295 | ||
296 | /** | |
5dafd8a6 SE |
297 | * batadv_tt_global_entry_put - decrement the tt_global_entry refcounter and |
298 | * possibly release it | |
92dcdf09 | 299 | * @tt_global_entry: tt_global_entry to be free'd |
21026059 | 300 | */ |
a513088d | 301 | static void |
5dafd8a6 | 302 | batadv_tt_global_entry_put(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 303 | { |
92dcdf09 SE |
304 | kref_put(&tt_global_entry->common.refcount, |
305 | batadv_tt_global_entry_release); | |
db08e6e5 SW |
306 | } |
307 | ||
1d8ab8d3 LL |
308 | /** |
309 | * batadv_tt_global_hash_count - count the number of orig entries | |
d15cd622 | 310 | * @bat_priv: the bat priv with all the soft interface information |
1d8ab8d3 LL |
311 | * @addr: the mac address of the client to count entries for |
312 | * @vid: VLAN identifier | |
313 | * | |
62fe710f | 314 | * Return: the number of originators advertising the given address/data |
1d8ab8d3 LL |
315 | * (excluding ourself). |
316 | */ | |
317 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 318 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
319 | { |
320 | struct batadv_tt_global_entry *tt_global_entry; | |
321 | int count; | |
322 | ||
323 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
324 | if (!tt_global_entry) | |
325 | return 0; | |
326 | ||
327 | count = atomic_read(&tt_global_entry->orig_list_count); | |
5dafd8a6 | 328 | batadv_tt_global_entry_put(tt_global_entry); |
1d8ab8d3 LL |
329 | |
330 | return count; | |
331 | } | |
332 | ||
7ea7b4a1 AQ |
333 | /** |
334 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
335 | * by vid | |
336 | * @bat_priv: the bat priv with all the soft interface information | |
337 | * @vid: the VLAN identifier of the sub-table to change | |
338 | * @v: the amount to sum to the local table size | |
339 | */ | |
340 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
341 | unsigned short vid, int v) | |
342 | { | |
343 | struct batadv_softif_vlan *vlan; | |
344 | ||
345 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
346 | if (!vlan) | |
347 | return; | |
348 | ||
349 | atomic_add(v, &vlan->tt.num_entries); | |
350 | ||
9c3bf081 | 351 | batadv_softif_vlan_put(vlan); |
7ea7b4a1 AQ |
352 | } |
353 | ||
354 | /** | |
355 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
356 | * vid | |
357 | * @bat_priv: the bat priv with all the soft interface information | |
358 | * @vid: the VLAN identifier | |
359 | */ | |
360 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
361 | unsigned short vid) | |
362 | { | |
363 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
364 | } | |
365 | ||
366 | /** | |
367 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
368 | * vid | |
369 | * @bat_priv: the bat priv with all the soft interface information | |
370 | * @vid: the VLAN identifier | |
371 | */ | |
372 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
373 | unsigned short vid) | |
374 | { | |
375 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
376 | } | |
377 | ||
378 | /** | |
d15cd622 AQ |
379 | * batadv_tt_global_size_mod - change the size by v of the global table |
380 | * for orig_node identified by vid | |
381 | * @orig_node: the originator for which the table has to be modified | |
7ea7b4a1 AQ |
382 | * @vid: the VLAN identifier |
383 | * @v: the amount to sum to the global table size | |
384 | */ | |
385 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
386 | unsigned short vid, int v) | |
387 | { | |
388 | struct batadv_orig_node_vlan *vlan; | |
389 | ||
390 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
391 | if (!vlan) | |
392 | return; | |
393 | ||
394 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
395 | spin_lock_bh(&orig_node->vlan_list_lock); | |
3db15209 SE |
396 | if (!hlist_unhashed(&vlan->list)) { |
397 | hlist_del_init_rcu(&vlan->list); | |
21754e25 | 398 | batadv_orig_node_vlan_put(vlan); |
3db15209 | 399 | } |
7ea7b4a1 | 400 | spin_unlock_bh(&orig_node->vlan_list_lock); |
7ea7b4a1 AQ |
401 | } |
402 | ||
21754e25 | 403 | batadv_orig_node_vlan_put(vlan); |
7ea7b4a1 AQ |
404 | } |
405 | ||
406 | /** | |
407 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
408 | * given vid | |
409 | * @orig_node: the originator which global table size has to be decreased | |
410 | * @vid: the vlan identifier | |
411 | */ | |
412 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
413 | unsigned short vid) | |
414 | { | |
415 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
416 | } | |
417 | ||
418 | /** | |
419 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
420 | * given vid | |
421 | * @orig_node: the originator which global table size has to be decreased | |
422 | * @vid: the vlan identifier | |
423 | */ | |
424 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
425 | unsigned short vid) | |
426 | { | |
427 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
428 | } | |
429 | ||
86452f81 SE |
430 | /** |
431 | * batadv_tt_orig_list_entry_free_rcu - free the orig_entry | |
432 | * @rcu: rcu pointer of the orig_entry | |
433 | */ | |
434 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) | |
435 | { | |
436 | struct batadv_tt_orig_list_entry *orig_entry; | |
437 | ||
438 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); | |
439 | ||
440 | kmem_cache_free(batadv_tt_orig_cache, orig_entry); | |
441 | } | |
442 | ||
42eff6a6 SE |
443 | /** |
444 | * batadv_tt_orig_list_entry_release - release tt orig entry from lists and | |
445 | * queue for free after rcu grace period | |
6e8ef69d | 446 | * @ref: kref pointer of the tt orig entry |
42eff6a6 | 447 | */ |
6e8ef69d | 448 | static void batadv_tt_orig_list_entry_release(struct kref *ref) |
42eff6a6 | 449 | { |
6e8ef69d SE |
450 | struct batadv_tt_orig_list_entry *orig_entry; |
451 | ||
452 | orig_entry = container_of(ref, struct batadv_tt_orig_list_entry, | |
453 | refcount); | |
454 | ||
5d967310 | 455 | batadv_orig_node_put(orig_entry->orig_node); |
86452f81 | 456 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
42eff6a6 SE |
457 | } |
458 | ||
6e8ef69d | 459 | /** |
7e2366c6 SE |
460 | * batadv_tt_orig_list_entry_put - decrement the tt orig entry refcounter and |
461 | * possibly release it | |
6e8ef69d SE |
462 | * @orig_entry: tt orig entry to be free'd |
463 | */ | |
a513088d | 464 | static void |
7e2366c6 | 465 | batadv_tt_orig_list_entry_put(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 466 | { |
6e8ef69d | 467 | kref_put(&orig_entry->refcount, batadv_tt_orig_list_entry_release); |
7683fdc1 AQ |
468 | } |
469 | ||
3abe4adb AQ |
470 | /** |
471 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
472 | * @bat_priv: the bat priv with all the soft interface information | |
473 | * @tt_local_entry: the TT entry involved in the event | |
474 | * @event_flags: flags to store in the event structure | |
475 | */ | |
56303d34 | 476 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 477 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 478 | u8 event_flags) |
a73105b8 | 479 | { |
56303d34 | 480 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 481 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 482 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
483 | bool event_removed = false; |
484 | bool del_op_requested, del_op_entry; | |
a73105b8 | 485 | |
86452f81 | 486 | tt_change_node = kmem_cache_alloc(batadv_tt_change_cache, GFP_ATOMIC); |
a73105b8 AQ |
487 | if (!tt_change_node) |
488 | return; | |
489 | ||
ff66c975 | 490 | tt_change_node->change.flags = flags; |
ca663046 AQ |
491 | memset(tt_change_node->change.reserved, 0, |
492 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 493 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 494 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 495 | |
acd34afa | 496 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
497 | |
498 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
499 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
500 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 501 | list) { |
3abe4adb | 502 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
503 | continue; |
504 | ||
505 | /* DEL+ADD in the same orig interval have no effect and can be | |
506 | * removed to avoid silly behaviour on the receiver side. The | |
507 | * other way around (ADD+DEL) can happen in case of roaming of | |
508 | * a client still in the NEW state. Roaming of NEW clients is | |
509 | * now possible due to automatically recognition of "temporary" | |
510 | * clients | |
511 | */ | |
acd34afa | 512 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
513 | if (!del_op_requested && del_op_entry) |
514 | goto del; | |
515 | if (del_op_requested && !del_op_entry) | |
516 | goto del; | |
3c4f7ab6 AQ |
517 | |
518 | /* this is a second add in the same originator interval. It | |
519 | * means that flags have been changed: update them! | |
520 | */ | |
521 | if (!del_op_requested && !del_op_entry) | |
522 | entry->change.flags = flags; | |
523 | ||
3b643de5 AQ |
524 | continue; |
525 | del: | |
526 | list_del(&entry->list); | |
86452f81 SE |
527 | kmem_cache_free(batadv_tt_change_cache, entry); |
528 | kmem_cache_free(batadv_tt_change_cache, tt_change_node); | |
3b643de5 AQ |
529 | event_removed = true; |
530 | goto unlock; | |
531 | } | |
532 | ||
a73105b8 | 533 | /* track the change in the OGMinterval list */ |
807736f6 | 534 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
535 | |
536 | unlock: | |
807736f6 | 537 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 538 | |
3b643de5 | 539 | if (event_removed) |
807736f6 | 540 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 541 | else |
807736f6 | 542 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
543 | } |
544 | ||
335fbe0f ML |
545 | /** |
546 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
547 | * @changes_num: number of tt changes | |
548 | * | |
62fe710f | 549 | * Return: computed length in bytes. |
335fbe0f ML |
550 | */ |
551 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 552 | { |
335fbe0f | 553 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
554 | } |
555 | ||
298e6e68 AQ |
556 | /** |
557 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
558 | * @tt_len: available space | |
559 | * | |
62fe710f | 560 | * Return: the number of entries. |
298e6e68 | 561 | */ |
6b5e971a | 562 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
563 | { |
564 | return tt_len / batadv_tt_len(1); | |
565 | } | |
566 | ||
a19d3d85 ML |
567 | /** |
568 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
569 | * size when transmitted over the air | |
570 | * @bat_priv: the bat priv with all the soft interface information | |
571 | * | |
62fe710f | 572 | * Return: local translation table size in bytes. |
a19d3d85 ML |
573 | */ |
574 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
575 | { | |
4f248cff SE |
576 | u16 num_vlan = 0; |
577 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
578 | struct batadv_softif_vlan *vlan; |
579 | int hdr_size; | |
580 | ||
581 | rcu_read_lock(); | |
582 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
583 | num_vlan++; | |
584 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
585 | } | |
586 | rcu_read_unlock(); | |
587 | ||
588 | /* header size of tvlv encapsulated tt response payload */ | |
589 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
590 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
591 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
592 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
593 | ||
594 | return hdr_size + batadv_tt_len(tt_local_entries); | |
595 | } | |
596 | ||
56303d34 | 597 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 598 | { |
807736f6 | 599 | if (bat_priv->tt.local_hash) |
5346c35e | 600 | return 0; |
c6c8fea2 | 601 | |
807736f6 | 602 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 603 | |
807736f6 | 604 | if (!bat_priv->tt.local_hash) |
5346c35e | 605 | return -ENOMEM; |
c6c8fea2 | 606 | |
dec05074 AQ |
607 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
608 | &batadv_tt_local_hash_lock_class_key); | |
609 | ||
5346c35e | 610 | return 0; |
c6c8fea2 SE |
611 | } |
612 | ||
068ee6e2 AQ |
613 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
614 | struct batadv_tt_global_entry *tt_global, | |
615 | const char *message) | |
616 | { | |
617 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
618 | "Deleting global tt entry %pM (vid: %d): %s\n", |
619 | tt_global->common.addr, | |
620 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
621 | |
622 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 623 | batadv_choose_tt, &tt_global->common); |
5dafd8a6 | 624 | batadv_tt_global_entry_put(tt_global); |
068ee6e2 AQ |
625 | } |
626 | ||
c018ad3d AQ |
627 | /** |
628 | * batadv_tt_local_add - add a new client to the local table or update an | |
629 | * existing client | |
630 | * @soft_iface: netdev struct of the mesh interface | |
631 | * @addr: the mac address of the client to add | |
632 | * @vid: VLAN identifier | |
633 | * @ifindex: index of the interface where the client is connected to (useful to | |
634 | * identify wireless clients) | |
9464d071 AQ |
635 | * @mark: the value contained in the skb->mark field of the received packet (if |
636 | * any) | |
a19d3d85 | 637 | * |
62fe710f | 638 | * Return: true if the client was successfully added, false otherwise. |
c018ad3d | 639 | */ |
6b5e971a SE |
640 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
641 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 642 | { |
56303d34 | 643 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 644 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 645 | struct batadv_tt_global_entry *tt_global = NULL; |
2cd45a06 | 646 | struct net *net = dev_net(soft_iface); |
35df3b29 | 647 | struct batadv_softif_vlan *vlan; |
0c69aecc | 648 | struct net_device *in_dev = NULL; |
10b1bbb4 | 649 | struct batadv_hard_iface *in_hardif = NULL; |
db08e6e5 | 650 | struct hlist_head *head; |
56303d34 | 651 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 652 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
653 | bool ret = false; |
654 | bool roamed_back = false; | |
6b5e971a SE |
655 | u8 remote_flags; |
656 | u32 match_mark; | |
c6c8fea2 | 657 | |
0c69aecc | 658 | if (ifindex != BATADV_NULL_IFINDEX) |
2cd45a06 | 659 | in_dev = dev_get_by_index(net, ifindex); |
0c69aecc | 660 | |
10b1bbb4 SE |
661 | if (in_dev) |
662 | in_hardif = batadv_hardif_get_by_netdev(in_dev); | |
663 | ||
c018ad3d | 664 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
665 | |
666 | if (!is_multicast_ether_addr(addr)) | |
667 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 668 | |
47c94655 AQ |
669 | if (tt_local) { |
670 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
671 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
672 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
673 | "Re-adding pending client %pM (vid: %d)\n", |
674 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
675 | /* whatever the reason why the PENDING flag was set, |
676 | * this is a client which was enqueued to be removed in | |
677 | * this orig_interval. Since it popped up again, the | |
678 | * flag can be reset like it was never enqueued | |
679 | */ | |
680 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
681 | goto add_event; | |
682 | } | |
683 | ||
684 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
685 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
686 | "Roaming client %pM (vid: %d) came back to its original location\n", |
687 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
688 | /* the ROAM flag is set because this client roamed away |
689 | * and the node got a roaming_advertisement message. Now | |
690 | * that the client popped up again at its original | |
691 | * location such flag can be unset | |
692 | */ | |
693 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
694 | roamed_back = true; | |
695 | } | |
696 | goto check_roaming; | |
c6c8fea2 SE |
697 | } |
698 | ||
a19d3d85 ML |
699 | /* Ignore the client if we cannot send it in a full table response. */ |
700 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
701 | table_size += batadv_tt_len(1); | |
702 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
703 | if (table_size > packet_size_max) { | |
704 | net_ratelimited_function(batadv_info, soft_iface, | |
705 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
706 | table_size, packet_size_max, addr); | |
707 | goto out; | |
708 | } | |
709 | ||
86452f81 | 710 | tt_local = kmem_cache_alloc(batadv_tl_cache, GFP_ATOMIC); |
47c94655 | 711 | if (!tt_local) |
7683fdc1 | 712 | goto out; |
a73105b8 | 713 | |
35df3b29 AQ |
714 | /* increase the refcounter of the related vlan */ |
715 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
0b3dd7df SW |
716 | if (!vlan) { |
717 | net_ratelimited_function(batadv_info, soft_iface, | |
718 | "adding TT local entry %pM to non-existent VLAN %d\n", | |
719 | addr, BATADV_PRINT_VID(vid)); | |
86452f81 | 720 | kmem_cache_free(batadv_tl_cache, tt_local); |
fd7dec25 | 721 | tt_local = NULL; |
354136bc | 722 | goto out; |
fd7dec25 | 723 | } |
35df3b29 | 724 | |
39c75a51 | 725 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
726 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
727 | addr, BATADV_PRINT_VID(vid), | |
6b5e971a | 728 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 729 | |
8fdd0153 | 730 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
731 | /* The local entry has to be marked as NEW to avoid to send it in |
732 | * a full table response going out before the next ttvn increment | |
733 | * (consistency check) | |
734 | */ | |
735 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 736 | tt_local->common.vid = vid; |
10b1bbb4 | 737 | if (batadv_is_wifi_hardif(in_hardif)) |
47c94655 | 738 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
92dcdf09 | 739 | kref_init(&tt_local->common.refcount); |
47c94655 AQ |
740 | tt_local->last_seen = jiffies; |
741 | tt_local->common.added_at = tt_local->last_seen; | |
a33d970d | 742 | tt_local->vlan = vlan; |
c6c8fea2 | 743 | |
c5caf4ef LL |
744 | /* the batman interface mac and multicast addresses should never be |
745 | * purged | |
746 | */ | |
747 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
748 | is_multicast_ether_addr(addr)) | |
47c94655 | 749 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 750 | |
e3387b26 | 751 | kref_get(&tt_local->common.refcount); |
807736f6 | 752 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 753 | batadv_choose_tt, &tt_local->common, |
47c94655 | 754 | &tt_local->common.hash_entry); |
80b3f58c SW |
755 | |
756 | if (unlikely(hash_added != 0)) { | |
757 | /* remove the reference for the hash */ | |
95c0db90 | 758 | batadv_tt_local_entry_put(tt_local); |
80b3f58c SW |
759 | goto out; |
760 | } | |
761 | ||
068ee6e2 | 762 | add_event: |
3abe4adb | 763 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 764 | |
068ee6e2 AQ |
765 | check_roaming: |
766 | /* Check whether it is a roaming, but don't do anything if the roaming | |
767 | * process has already been handled | |
768 | */ | |
769 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 770 | /* These node are probably going to update their tt table */ |
47c94655 | 771 | head = &tt_global->orig_list; |
db08e6e5 | 772 | rcu_read_lock(); |
b67bfe0d | 773 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 774 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 775 | tt_global->common.vid, |
a513088d | 776 | orig_entry->orig_node); |
db08e6e5 SW |
777 | } |
778 | rcu_read_unlock(); | |
068ee6e2 AQ |
779 | if (roamed_back) { |
780 | batadv_tt_global_free(bat_priv, tt_global, | |
781 | "Roaming canceled"); | |
782 | tt_global = NULL; | |
783 | } else { | |
784 | /* The global entry has to be marked as ROAMING and | |
785 | * has to be kept for consistency purpose | |
786 | */ | |
787 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
788 | tt_global->roam_at = jiffies; | |
789 | } | |
7683fdc1 | 790 | } |
068ee6e2 | 791 | |
3c4f7ab6 AQ |
792 | /* store the current remote flags before altering them. This helps |
793 | * understanding is flags are changing or not | |
794 | */ | |
795 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
796 | ||
10b1bbb4 | 797 | if (batadv_is_wifi_hardif(in_hardif)) |
3c4f7ab6 AQ |
798 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
799 | else | |
800 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 801 | |
9464d071 AQ |
802 | /* check the mark in the skb: if it's equal to the configured |
803 | * isolation_mark, it means the packet is coming from an isolated | |
804 | * non-mesh client | |
805 | */ | |
806 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
807 | if (bat_priv->isolation_mark_mask && | |
808 | match_mark == bat_priv->isolation_mark) | |
809 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
810 | else | |
811 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
812 | ||
3c4f7ab6 AQ |
813 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
814 | * entry so that all the nodes can get the new flags | |
815 | */ | |
816 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
817 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
818 | ||
819 | ret = true; | |
7683fdc1 | 820 | out: |
10b1bbb4 SE |
821 | if (in_hardif) |
822 | batadv_hardif_put(in_hardif); | |
0c69aecc AQ |
823 | if (in_dev) |
824 | dev_put(in_dev); | |
47c94655 | 825 | if (tt_local) |
95c0db90 | 826 | batadv_tt_local_entry_put(tt_local); |
47c94655 | 827 | if (tt_global) |
5dafd8a6 | 828 | batadv_tt_global_entry_put(tt_global); |
a19d3d85 | 829 | return ret; |
c6c8fea2 SE |
830 | } |
831 | ||
7ea7b4a1 AQ |
832 | /** |
833 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
834 | * within a TT Response directed to another node | |
835 | * @orig_node: originator for which the TT data has to be prepared | |
836 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
837 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
838 | * changed can be stored | |
839 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
840 | * function reserves the amount of space needed to send the entire global TT | |
841 | * table. In case of success the value is updated with the real amount of | |
842 | * reserved bytes | |
7ea7b4a1 AQ |
843 | * Allocate the needed amount of memory for the entire TT TVLV and write its |
844 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
845 | * objects, one per active VLAN served by the originator node. | |
846 | * | |
62fe710f | 847 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 848 | */ |
6b5e971a | 849 | static u16 |
7ea7b4a1 AQ |
850 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
851 | struct batadv_tvlv_tt_data **tt_data, | |
852 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 853 | s32 *tt_len) |
7ea7b4a1 | 854 | { |
4f248cff SE |
855 | u16 num_vlan = 0; |
856 | u16 num_entries = 0; | |
857 | u16 change_offset; | |
858 | u16 tvlv_len; | |
7ea7b4a1 AQ |
859 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
860 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 861 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
862 | |
863 | rcu_read_lock(); | |
d0fa4f3f | 864 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
865 | num_vlan++; |
866 | num_entries += atomic_read(&vlan->tt.num_entries); | |
867 | } | |
868 | ||
869 | change_offset = sizeof(**tt_data); | |
870 | change_offset += num_vlan * sizeof(*tt_vlan); | |
871 | ||
872 | /* if tt_len is negative, allocate the space needed by the full table */ | |
873 | if (*tt_len < 0) | |
874 | *tt_len = batadv_tt_len(num_entries); | |
875 | ||
876 | tvlv_len = *tt_len; | |
877 | tvlv_len += change_offset; | |
878 | ||
879 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
880 | if (!*tt_data) { | |
881 | *tt_len = 0; | |
882 | goto out; | |
883 | } | |
884 | ||
885 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
886 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
887 | (*tt_data)->num_vlan = htons(num_vlan); | |
888 | ||
889 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
d0fa4f3f | 890 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
891 | tt_vlan->vid = htons(vlan->vid); |
892 | tt_vlan->crc = htonl(vlan->tt.crc); | |
893 | ||
894 | tt_vlan++; | |
895 | } | |
896 | ||
6b5e971a | 897 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
898 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
899 | ||
900 | out: | |
901 | rcu_read_unlock(); | |
902 | return tvlv_len; | |
903 | } | |
904 | ||
905 | /** | |
906 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
907 | * node | |
908 | * @bat_priv: the bat priv with all the soft interface information | |
909 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
910 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
911 | * changes can be stored | |
912 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
913 | * function reserves the amount of space needed to send the entire local TT | |
914 | * table. In case of success the value is updated with the real amount of | |
915 | * reserved bytes | |
916 | * | |
917 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
918 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
919 | * objects, one per active VLAN. | |
920 | * | |
62fe710f | 921 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 922 | */ |
6b5e971a | 923 | static u16 |
7ea7b4a1 AQ |
924 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
925 | struct batadv_tvlv_tt_data **tt_data, | |
926 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 927 | s32 *tt_len) |
7ea7b4a1 AQ |
928 | { |
929 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
930 | struct batadv_softif_vlan *vlan; | |
4f248cff SE |
931 | u16 num_vlan = 0; |
932 | u16 num_entries = 0; | |
933 | u16 tvlv_len; | |
6b5e971a | 934 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
935 | int change_offset; |
936 | ||
937 | rcu_read_lock(); | |
938 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
939 | num_vlan++; | |
940 | num_entries += atomic_read(&vlan->tt.num_entries); | |
941 | } | |
942 | ||
943 | change_offset = sizeof(**tt_data); | |
944 | change_offset += num_vlan * sizeof(*tt_vlan); | |
945 | ||
946 | /* if tt_len is negative, allocate the space needed by the full table */ | |
947 | if (*tt_len < 0) | |
948 | *tt_len = batadv_tt_len(num_entries); | |
949 | ||
950 | tvlv_len = *tt_len; | |
951 | tvlv_len += change_offset; | |
952 | ||
953 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
954 | if (!*tt_data) { | |
955 | tvlv_len = 0; | |
956 | goto out; | |
957 | } | |
958 | ||
959 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
960 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
961 | (*tt_data)->num_vlan = htons(num_vlan); | |
962 | ||
963 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
964 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
965 | tt_vlan->vid = htons(vlan->vid); | |
966 | tt_vlan->crc = htonl(vlan->tt.crc); | |
967 | ||
968 | tt_vlan++; | |
969 | } | |
970 | ||
6b5e971a | 971 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
972 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
973 | ||
974 | out: | |
975 | rcu_read_unlock(); | |
976 | return tvlv_len; | |
977 | } | |
978 | ||
e1bf0c14 ML |
979 | /** |
980 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
981 | * after local tt changes have been committed | |
982 | * @bat_priv: the bat priv with all the soft interface information | |
983 | */ | |
984 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 985 | { |
e1bf0c14 ML |
986 | struct batadv_tt_change_node *entry, *safe; |
987 | struct batadv_tvlv_tt_data *tt_data; | |
988 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 989 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
990 | int tt_diff_entries_num = 0; |
991 | int tt_diff_entries_count = 0; | |
6b5e971a | 992 | u16 tvlv_len; |
be9aa4c1 | 993 | |
7ea7b4a1 AQ |
994 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
995 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
996 | |
997 | /* if we have too many changes for one packet don't send any | |
998 | * and wait for the tt table request which will be fragmented | |
999 | */ | |
e1bf0c14 ML |
1000 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
1001 | tt_diff_len = 0; | |
be9aa4c1 | 1002 | |
7ea7b4a1 AQ |
1003 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
1004 | &tt_change, &tt_diff_len); | |
1005 | if (!tvlv_len) | |
e1bf0c14 | 1006 | return; |
be9aa4c1 | 1007 | |
e1bf0c14 | 1008 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 1009 | |
e1bf0c14 ML |
1010 | if (tt_diff_len == 0) |
1011 | goto container_register; | |
be9aa4c1 | 1012 | |
807736f6 SE |
1013 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
1014 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 1015 | |
807736f6 | 1016 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 1017 | list) { |
e1bf0c14 ML |
1018 | if (tt_diff_entries_count < tt_diff_entries_num) { |
1019 | memcpy(tt_change + tt_diff_entries_count, | |
1020 | &entry->change, | |
1021 | sizeof(struct batadv_tvlv_tt_change)); | |
1022 | tt_diff_entries_count++; | |
c6c8fea2 | 1023 | } |
a73105b8 | 1024 | list_del(&entry->list); |
86452f81 | 1025 | kmem_cache_free(batadv_tt_change_cache, entry); |
c6c8fea2 | 1026 | } |
807736f6 | 1027 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
1028 | |
1029 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
1030 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
1031 | kfree(bat_priv->tt.last_changeset); | |
1032 | bat_priv->tt.last_changeset_len = 0; | |
1033 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 1034 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 1035 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 1036 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 1037 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
1038 | * instead of providing the diff |
1039 | */ | |
e1bf0c14 | 1040 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 1041 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
1042 | memcpy(bat_priv->tt.last_changeset, |
1043 | tt_change, tt_change_len); | |
1044 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
1045 | } |
1046 | } | |
807736f6 | 1047 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 1048 | |
e1bf0c14 ML |
1049 | container_register: |
1050 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 1051 | tvlv_len); |
e1bf0c14 | 1052 | kfree(tt_data); |
c6c8fea2 SE |
1053 | } |
1054 | ||
dc1cbd14 | 1055 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
08c36d3e | 1056 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1057 | { |
1058 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1059 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1060 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1061 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 1062 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 1063 | struct batadv_hard_iface *primary_if; |
c6c8fea2 | 1064 | struct hlist_head *head; |
6b5e971a | 1065 | u32 i; |
85766a82 AQ |
1066 | int last_seen_secs; |
1067 | int last_seen_msecs; | |
1068 | unsigned long last_seen_jiffies; | |
1069 | bool no_purge; | |
6b5e971a | 1070 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 1071 | |
30da63a6 ML |
1072 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1073 | if (!primary_if) | |
32ae9b22 | 1074 | goto out; |
c6c8fea2 | 1075 | |
86ceb360 | 1076 | seq_printf(seq, |
7ea7b4a1 | 1077 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 1078 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
925a6f37 AQ |
1079 | seq_puts(seq, |
1080 | " Client VID Flags Last seen (CRC )\n"); | |
c6c8fea2 | 1081 | |
c6c8fea2 SE |
1082 | for (i = 0; i < hash->size; i++) { |
1083 | head = &hash->table[i]; | |
1084 | ||
7aadf889 | 1085 | rcu_read_lock(); |
b67bfe0d | 1086 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1087 | head, hash_entry) { |
85766a82 AQ |
1088 | tt_local = container_of(tt_common_entry, |
1089 | struct batadv_tt_local_entry, | |
1090 | common); | |
1091 | last_seen_jiffies = jiffies - tt_local->last_seen; | |
1092 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1093 | last_seen_secs = last_seen_msecs / 1000; | |
1094 | last_seen_msecs = last_seen_msecs % 1000; | |
1095 | ||
1096 | no_purge = tt_common_entry->flags & np_flag; | |
7ea7b4a1 | 1097 | seq_printf(seq, |
dd24ddb2 | 1098 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 1099 | tt_common_entry->addr, |
16052789 | 1100 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
1101 | ((tt_common_entry->flags & |
1102 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 1103 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
1104 | ((tt_common_entry->flags & |
1105 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
1106 | ((tt_common_entry->flags & | |
1107 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
1108 | ((tt_common_entry->flags & | |
1109 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1110 | ((tt_common_entry->flags & | |
1111 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1112 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 | 1113 | no_purge ? 0 : last_seen_msecs, |
a33d970d | 1114 | tt_local->vlan->tt.crc); |
c6c8fea2 | 1115 | } |
7aadf889 | 1116 | rcu_read_unlock(); |
c6c8fea2 | 1117 | } |
32ae9b22 ML |
1118 | out: |
1119 | if (primary_if) | |
82047ad7 | 1120 | batadv_hardif_put(primary_if); |
30da63a6 | 1121 | return 0; |
c6c8fea2 | 1122 | } |
dc1cbd14 | 1123 | #endif |
c6c8fea2 | 1124 | |
d34f0550 MS |
1125 | /** |
1126 | * batadv_tt_local_dump_entry - Dump one TT local entry into a message | |
1127 | * @msg :Netlink message to dump into | |
1128 | * @portid: Port making netlink request | |
1129 | * @seq: Sequence number of netlink message | |
1130 | * @bat_priv: The bat priv with all the soft interface information | |
1131 | * @common: tt local & tt global common data | |
1132 | * | |
1133 | * Return: Error code, or 0 on success | |
1134 | */ | |
1135 | static int | |
1136 | batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
1137 | struct batadv_priv *bat_priv, | |
1138 | struct batadv_tt_common_entry *common) | |
1139 | { | |
1140 | void *hdr; | |
1141 | struct batadv_softif_vlan *vlan; | |
1142 | struct batadv_tt_local_entry *local; | |
1143 | unsigned int last_seen_msecs; | |
1144 | u32 crc; | |
1145 | ||
1146 | local = container_of(common, struct batadv_tt_local_entry, common); | |
1147 | last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen); | |
1148 | ||
1149 | vlan = batadv_softif_vlan_get(bat_priv, common->vid); | |
1150 | if (!vlan) | |
1151 | return 0; | |
1152 | ||
1153 | crc = vlan->tt.crc; | |
1154 | ||
1155 | batadv_softif_vlan_put(vlan); | |
1156 | ||
1157 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
1158 | NLM_F_MULTI, | |
1159 | BATADV_CMD_GET_TRANSTABLE_LOCAL); | |
1160 | if (!hdr) | |
1161 | return -ENOBUFS; | |
1162 | ||
1163 | if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || | |
1164 | nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || | |
1165 | nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || | |
1166 | nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) | |
1167 | goto nla_put_failure; | |
1168 | ||
1169 | if (!(common->flags & BATADV_TT_CLIENT_NOPURGE) && | |
1170 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, last_seen_msecs)) | |
1171 | goto nla_put_failure; | |
1172 | ||
1173 | genlmsg_end(msg, hdr); | |
1174 | return 0; | |
1175 | ||
1176 | nla_put_failure: | |
1177 | genlmsg_cancel(msg, hdr); | |
1178 | return -EMSGSIZE; | |
1179 | } | |
1180 | ||
1181 | /** | |
1182 | * batadv_tt_local_dump_bucket - Dump one TT local bucket into a message | |
1183 | * @msg: Netlink message to dump into | |
1184 | * @portid: Port making netlink request | |
1185 | * @seq: Sequence number of netlink message | |
1186 | * @bat_priv: The bat priv with all the soft interface information | |
1187 | * @head: Pointer to the list containing the local tt entries | |
1188 | * @idx_s: Number of entries to skip | |
1189 | * | |
1190 | * Return: Error code, or 0 on success | |
1191 | */ | |
1192 | static int | |
1193 | batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
1194 | struct batadv_priv *bat_priv, | |
1195 | struct hlist_head *head, int *idx_s) | |
1196 | { | |
1197 | struct batadv_tt_common_entry *common; | |
1198 | int idx = 0; | |
1199 | ||
1200 | rcu_read_lock(); | |
1201 | hlist_for_each_entry_rcu(common, head, hash_entry) { | |
1202 | if (idx++ < *idx_s) | |
1203 | continue; | |
1204 | ||
1205 | if (batadv_tt_local_dump_entry(msg, portid, seq, bat_priv, | |
1206 | common)) { | |
1207 | rcu_read_unlock(); | |
1208 | *idx_s = idx - 1; | |
1209 | return -EMSGSIZE; | |
1210 | } | |
1211 | } | |
1212 | rcu_read_unlock(); | |
1213 | ||
1214 | *idx_s = 0; | |
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | /** | |
1219 | * batadv_tt_local_dump - Dump TT local entries into a message | |
1220 | * @msg: Netlink message to dump into | |
1221 | * @cb: Parameters from query | |
1222 | * | |
1223 | * Return: Error code, or 0 on success | |
1224 | */ | |
1225 | int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
1226 | { | |
1227 | struct net *net = sock_net(cb->skb->sk); | |
1228 | struct net_device *soft_iface; | |
1229 | struct batadv_priv *bat_priv; | |
1230 | struct batadv_hard_iface *primary_if = NULL; | |
1231 | struct batadv_hashtable *hash; | |
1232 | struct hlist_head *head; | |
1233 | int ret; | |
1234 | int ifindex; | |
1235 | int bucket = cb->args[0]; | |
1236 | int idx = cb->args[1]; | |
1237 | int portid = NETLINK_CB(cb->skb).portid; | |
1238 | ||
1239 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
1240 | if (!ifindex) | |
1241 | return -EINVAL; | |
1242 | ||
1243 | soft_iface = dev_get_by_index(net, ifindex); | |
1244 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
1245 | ret = -ENODEV; | |
1246 | goto out; | |
1247 | } | |
1248 | ||
1249 | bat_priv = netdev_priv(soft_iface); | |
1250 | ||
1251 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
1252 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { | |
1253 | ret = -ENOENT; | |
1254 | goto out; | |
1255 | } | |
1256 | ||
1257 | hash = bat_priv->tt.local_hash; | |
1258 | ||
1259 | while (bucket < hash->size) { | |
1260 | head = &hash->table[bucket]; | |
1261 | ||
1262 | if (batadv_tt_local_dump_bucket(msg, portid, cb->nlh->nlmsg_seq, | |
1263 | bat_priv, head, &idx)) | |
1264 | break; | |
1265 | ||
1266 | bucket++; | |
1267 | } | |
1268 | ||
1269 | ret = msg->len; | |
1270 | ||
1271 | out: | |
1272 | if (primary_if) | |
1273 | batadv_hardif_put(primary_if); | |
1274 | if (soft_iface) | |
1275 | dev_put(soft_iface); | |
1276 | ||
1277 | cb->args[0] = bucket; | |
1278 | cb->args[1] = idx; | |
1279 | ||
1280 | return ret; | |
1281 | } | |
1282 | ||
56303d34 SE |
1283 | static void |
1284 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1285 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1286 | u16 flags, const char *message) |
c6c8fea2 | 1287 | { |
3abe4adb | 1288 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1289 | |
015758d0 AQ |
1290 | /* The local client has to be marked as "pending to be removed" but has |
1291 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1292 | * response issued before the net ttvn increment (consistency check) |
1293 | */ | |
acd34afa | 1294 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1295 | |
39c75a51 | 1296 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1297 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1298 | tt_local_entry->common.addr, | |
1299 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1300 | } |
1301 | ||
7f91d06c AQ |
1302 | /** |
1303 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1304 | * @bat_priv: the bat priv with all the soft interface information | |
1305 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1306 | * @vid: VLAN identifier |
7f91d06c AQ |
1307 | * @message: message to append to the log on deletion |
1308 | * @roaming: true if the deletion is due to a roaming event | |
1309 | * | |
62fe710f | 1310 | * Return: the flags assigned to the local entry before being deleted |
7f91d06c | 1311 | */ |
6b5e971a SE |
1312 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1313 | unsigned short vid, const char *message, | |
1314 | bool roaming) | |
c6c8fea2 | 1315 | { |
170173bf | 1316 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1317 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
ef72706a | 1318 | void *tt_entry_exists; |
c6c8fea2 | 1319 | |
c018ad3d | 1320 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1321 | if (!tt_local_entry) |
1322 | goto out; | |
1323 | ||
7f91d06c AQ |
1324 | curr_flags = tt_local_entry->common.flags; |
1325 | ||
acd34afa | 1326 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1327 | /* if this global entry addition is due to a roaming, the node has to |
1328 | * mark the local entry as "roamed" in order to correctly reroute | |
1329 | * packets later | |
1330 | */ | |
7c1fd91d | 1331 | if (roaming) { |
acd34afa | 1332 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1333 | /* mark the local client as ROAMed */ |
1334 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1335 | } | |
42d0b044 | 1336 | |
068ee6e2 AQ |
1337 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1338 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1339 | message); | |
1340 | goto out; | |
1341 | } | |
1342 | /* if this client has been added right now, it is possible to | |
1343 | * immediately purge it | |
1344 | */ | |
3abe4adb | 1345 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1346 | |
1347 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1348 | batadv_compare_tt, | |
1349 | batadv_choose_tt, | |
1350 | &tt_local_entry->common); | |
1351 | if (!tt_entry_exists) | |
1352 | goto out; | |
1353 | ||
1354 | /* extra call to free the local tt entry */ | |
95c0db90 | 1355 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c | 1356 | |
7683fdc1 AQ |
1357 | out: |
1358 | if (tt_local_entry) | |
95c0db90 | 1359 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c AQ |
1360 | |
1361 | return curr_flags; | |
c6c8fea2 SE |
1362 | } |
1363 | ||
a19d3d85 ML |
1364 | /** |
1365 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1366 | * @bat_priv: the bat priv with all the soft interface information | |
1367 | * @head: pointer to the list containing the local tt entries | |
1368 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1369 | * inactive or not | |
1370 | */ | |
56303d34 | 1371 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1372 | struct hlist_head *head, |
1373 | int timeout) | |
c6c8fea2 | 1374 | { |
56303d34 SE |
1375 | struct batadv_tt_local_entry *tt_local_entry; |
1376 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1377 | struct hlist_node *node_tmp; |
acd34afa | 1378 | |
b67bfe0d | 1379 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1380 | hash_entry) { |
1381 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1382 | struct batadv_tt_local_entry, |
1383 | common); | |
acd34afa SE |
1384 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1385 | continue; | |
1386 | ||
1387 | /* entry already marked for deletion */ | |
1388 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1389 | continue; | |
1390 | ||
a19d3d85 | 1391 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1392 | continue; |
1393 | ||
1394 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1395 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1396 | } | |
1397 | } | |
1398 | ||
a19d3d85 ML |
1399 | /** |
1400 | * batadv_tt_local_purge - purge inactive tt local entries | |
1401 | * @bat_priv: the bat priv with all the soft interface information | |
1402 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1403 | * inactive or not | |
1404 | */ | |
1405 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1406 | int timeout) | |
acd34afa | 1407 | { |
807736f6 | 1408 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1409 | struct hlist_head *head; |
7683fdc1 | 1410 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1411 | u32 i; |
c6c8fea2 | 1412 | |
c6c8fea2 SE |
1413 | for (i = 0; i < hash->size; i++) { |
1414 | head = &hash->table[i]; | |
7683fdc1 | 1415 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1416 | |
7683fdc1 | 1417 | spin_lock_bh(list_lock); |
a19d3d85 | 1418 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1419 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1420 | } |
c6c8fea2 SE |
1421 | } |
1422 | ||
56303d34 | 1423 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1424 | { |
5bf74e9c | 1425 | struct batadv_hashtable *hash; |
a73105b8 | 1426 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1427 | struct batadv_tt_common_entry *tt_common_entry; |
1428 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 1429 | struct hlist_node *node_tmp; |
7683fdc1 | 1430 | struct hlist_head *head; |
6b5e971a | 1431 | u32 i; |
a73105b8 | 1432 | |
807736f6 | 1433 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1434 | return; |
1435 | ||
807736f6 | 1436 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1437 | |
1438 | for (i = 0; i < hash->size; i++) { | |
1439 | head = &hash->table[i]; | |
1440 | list_lock = &hash->list_locks[i]; | |
1441 | ||
1442 | spin_lock_bh(list_lock); | |
b67bfe0d | 1443 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1444 | head, hash_entry) { |
b67bfe0d | 1445 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1446 | tt_local = container_of(tt_common_entry, |
1447 | struct batadv_tt_local_entry, | |
1448 | common); | |
35df3b29 | 1449 | |
95c0db90 | 1450 | batadv_tt_local_entry_put(tt_local); |
a73105b8 AQ |
1451 | } |
1452 | spin_unlock_bh(list_lock); | |
1453 | } | |
1454 | ||
1a8eaf07 | 1455 | batadv_hash_destroy(hash); |
a73105b8 | 1456 | |
807736f6 | 1457 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1458 | } |
1459 | ||
56303d34 | 1460 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1461 | { |
807736f6 | 1462 | if (bat_priv->tt.global_hash) |
5346c35e | 1463 | return 0; |
c6c8fea2 | 1464 | |
807736f6 | 1465 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1466 | |
807736f6 | 1467 | if (!bat_priv->tt.global_hash) |
5346c35e | 1468 | return -ENOMEM; |
c6c8fea2 | 1469 | |
dec05074 AQ |
1470 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1471 | &batadv_tt_global_hash_lock_class_key); | |
1472 | ||
5346c35e | 1473 | return 0; |
c6c8fea2 SE |
1474 | } |
1475 | ||
56303d34 | 1476 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1477 | { |
56303d34 | 1478 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1479 | |
807736f6 | 1480 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1481 | |
807736f6 | 1482 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1483 | list) { |
1484 | list_del(&entry->list); | |
86452f81 | 1485 | kmem_cache_free(batadv_tt_change_cache, entry); |
a73105b8 | 1486 | } |
c6c8fea2 | 1487 | |
807736f6 SE |
1488 | atomic_set(&bat_priv->tt.local_changes, 0); |
1489 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1490 | } |
c6c8fea2 | 1491 | |
62fe710f | 1492 | /** |
d15cd622 AQ |
1493 | * batadv_tt_global_orig_entry_find - find a TT orig_list_entry |
1494 | * @entry: the TT global entry where the orig_list_entry has to be | |
1495 | * extracted from | |
1496 | * @orig_node: the originator for which the orig_list_entry has to be found | |
62fe710f | 1497 | * |
d15cd622 | 1498 | * retrieve the orig_tt_list_entry belonging to orig_node from the |
d657e621 AQ |
1499 | * batadv_tt_global_entry list |
1500 | * | |
62fe710f | 1501 | * Return: it with an increased refcounter, NULL if not found |
db08e6e5 | 1502 | */ |
d657e621 AQ |
1503 | static struct batadv_tt_orig_list_entry * |
1504 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1505 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1506 | { |
d657e621 | 1507 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1508 | const struct hlist_head *head; |
db08e6e5 SW |
1509 | |
1510 | rcu_read_lock(); | |
1511 | head = &entry->orig_list; | |
b67bfe0d | 1512 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1513 | if (tmp_orig_entry->orig_node != orig_node) |
1514 | continue; | |
6e8ef69d | 1515 | if (!kref_get_unless_zero(&tmp_orig_entry->refcount)) |
d657e621 AQ |
1516 | continue; |
1517 | ||
1518 | orig_entry = tmp_orig_entry; | |
1519 | break; | |
db08e6e5 SW |
1520 | } |
1521 | rcu_read_unlock(); | |
d657e621 AQ |
1522 | |
1523 | return orig_entry; | |
1524 | } | |
1525 | ||
62fe710f | 1526 | /** |
d15cd622 AQ |
1527 | * batadv_tt_global_entry_has_orig - check if a TT global entry is also handled |
1528 | * by a given originator | |
1529 | * @entry: the TT global entry to check | |
1530 | * @orig_node: the originator to search in the list | |
62fe710f SE |
1531 | * |
1532 | * find out if an orig_node is already in the list of a tt_global_entry. | |
1533 | * | |
1534 | * Return: true if found, false otherwise | |
d657e621 AQ |
1535 | */ |
1536 | static bool | |
1537 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1538 | const struct batadv_orig_node *orig_node) | |
1539 | { | |
1540 | struct batadv_tt_orig_list_entry *orig_entry; | |
1541 | bool found = false; | |
1542 | ||
1543 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1544 | if (orig_entry) { | |
1545 | found = true; | |
7e2366c6 | 1546 | batadv_tt_orig_list_entry_put(orig_entry); |
d657e621 AQ |
1547 | } |
1548 | ||
db08e6e5 SW |
1549 | return found; |
1550 | } | |
1551 | ||
a513088d | 1552 | static void |
d657e621 | 1553 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1554 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1555 | { |
56303d34 | 1556 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1557 | |
d657e621 | 1558 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1559 | if (orig_entry) { |
1560 | /* refresh the ttvn: the current value could be a bogus one that | |
1561 | * was added during a "temporary client detection" | |
1562 | */ | |
1563 | orig_entry->ttvn = ttvn; | |
d657e621 | 1564 | goto out; |
30cfd02b | 1565 | } |
d657e621 | 1566 | |
86452f81 | 1567 | orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC); |
db08e6e5 | 1568 | if (!orig_entry) |
d657e621 | 1569 | goto out; |
db08e6e5 SW |
1570 | |
1571 | INIT_HLIST_NODE(&orig_entry->list); | |
7c124391 | 1572 | kref_get(&orig_node->refcount); |
7ea7b4a1 | 1573 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1574 | orig_entry->orig_node = orig_node; |
1575 | orig_entry->ttvn = ttvn; | |
6e8ef69d | 1576 | kref_init(&orig_entry->refcount); |
db08e6e5 | 1577 | |
d657e621 | 1578 | spin_lock_bh(&tt_global->list_lock); |
23f55485 | 1579 | kref_get(&orig_entry->refcount); |
db08e6e5 | 1580 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1581 | &tt_global->orig_list); |
1582 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1583 | atomic_inc(&tt_global->orig_list_count); |
1584 | ||
d657e621 AQ |
1585 | out: |
1586 | if (orig_entry) | |
7e2366c6 | 1587 | batadv_tt_orig_list_entry_put(orig_entry); |
db08e6e5 SW |
1588 | } |
1589 | ||
d4ff40f6 AQ |
1590 | /** |
1591 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1592 | * @bat_priv: the bat priv with all the soft interface information | |
1593 | * @orig_node: the originator announcing the client | |
1594 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1595 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1596 | * @flags: TT flags that have to be set for this non-mesh client |
1597 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1598 | * | |
1599 | * Add a new TT global entry for the given originator. If the entry already | |
1600 | * exists add a new reference to the given originator (a global entry can have | |
1601 | * references to multiple originators) and adjust the flags attribute to reflect | |
1602 | * the function argument. | |
1603 | * If a TT local entry exists for this non-mesh client remove it. | |
1604 | * | |
1605 | * The caller must hold orig_node refcount. | |
1e5d49fc | 1606 | * |
62fe710f | 1607 | * Return: true if the new entry has been added, false otherwise |
d4ff40f6 | 1608 | */ |
1e5d49fc AQ |
1609 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1610 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1611 | const unsigned char *tt_addr, |
6b5e971a | 1612 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1613 | { |
170173bf SE |
1614 | struct batadv_tt_global_entry *tt_global_entry; |
1615 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1616 | bool ret = false; |
80b3f58c | 1617 | int hash_added; |
56303d34 | 1618 | struct batadv_tt_common_entry *common; |
6b5e971a | 1619 | u16 local_flags; |
c6c8fea2 | 1620 | |
cfd4f757 AQ |
1621 | /* ignore global entries from backbone nodes */ |
1622 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1623 | return true; | |
1624 | ||
c018ad3d AQ |
1625 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1626 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1627 | |
1628 | /* if the node already has a local client for this entry, it has to wait | |
1629 | * for a roaming advertisement instead of manually messing up the global | |
1630 | * table | |
1631 | */ | |
1632 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1633 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1634 | goto out; | |
a73105b8 AQ |
1635 | |
1636 | if (!tt_global_entry) { | |
86452f81 SE |
1637 | tt_global_entry = kmem_cache_zalloc(batadv_tg_cache, |
1638 | GFP_ATOMIC); | |
a73105b8 | 1639 | if (!tt_global_entry) |
7683fdc1 AQ |
1640 | goto out; |
1641 | ||
c0a55929 | 1642 | common = &tt_global_entry->common; |
8fdd0153 | 1643 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1644 | common->vid = vid; |
db08e6e5 | 1645 | |
d4f44692 | 1646 | common->flags = flags; |
cc47f66e | 1647 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1648 | /* node must store current time in case of roaming. This is |
1649 | * needed to purge this entry out on timeout (if nobody claims | |
1650 | * it) | |
1651 | */ | |
1652 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1653 | tt_global_entry->roam_at = jiffies; | |
92dcdf09 | 1654 | kref_init(&common->refcount); |
30cfd02b | 1655 | common->added_at = jiffies; |
db08e6e5 SW |
1656 | |
1657 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1658 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1659 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1660 | |
15d5ffde | 1661 | kref_get(&common->refcount); |
807736f6 | 1662 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1663 | batadv_compare_tt, |
c018ad3d | 1664 | batadv_choose_tt, common, |
a513088d | 1665 | &common->hash_entry); |
80b3f58c SW |
1666 | |
1667 | if (unlikely(hash_added != 0)) { | |
1668 | /* remove the reference for the hash */ | |
5dafd8a6 | 1669 | batadv_tt_global_entry_put(tt_global_entry); |
80b3f58c SW |
1670 | goto out_remove; |
1671 | } | |
a73105b8 | 1672 | } else { |
068ee6e2 | 1673 | common = &tt_global_entry->common; |
30cfd02b AQ |
1674 | /* If there is already a global entry, we can use this one for |
1675 | * our processing. | |
068ee6e2 AQ |
1676 | * But if we are trying to add a temporary client then here are |
1677 | * two options at this point: | |
1678 | * 1) the global client is not a temporary client: the global | |
1679 | * client has to be left as it is, temporary information | |
1680 | * should never override any already known client state | |
1681 | * 2) the global client is a temporary client: purge the | |
1682 | * originator list and add the new one orig_entry | |
30cfd02b | 1683 | */ |
068ee6e2 AQ |
1684 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1685 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1686 | goto out; | |
1687 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1688 | orig_node)) | |
1689 | goto out_remove; | |
1690 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1691 | goto add_orig_entry; | |
1692 | } | |
30cfd02b AQ |
1693 | |
1694 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1695 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1696 | * remove the previous temporary orig node and re-add it | |
1697 | * if required. If the orig entry changed, the new one which | |
1698 | * is a non-temporary entry is preferred. | |
30cfd02b | 1699 | */ |
a6cb3909 SW |
1700 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1701 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1702 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1703 | } | |
db08e6e5 | 1704 | |
e9c00136 AQ |
1705 | /* the change can carry possible "attribute" flags like the |
1706 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1707 | * client entry | |
1708 | */ | |
ad7e2c46 | 1709 | common->flags |= flags; |
e9c00136 | 1710 | |
acd34afa SE |
1711 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1712 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1713 | * delete + roaming change for this originator. |
1714 | * | |
1715 | * We should first delete the old originator before adding the | |
1716 | * new one. | |
1717 | */ | |
068ee6e2 | 1718 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1719 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1720 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1721 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1722 | } |
1723 | } | |
068ee6e2 | 1724 | add_orig_entry: |
30cfd02b | 1725 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1726 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1727 | |
39c75a51 | 1728 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1729 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1730 | common->addr, BATADV_PRINT_VID(common->vid), | |
1731 | orig_node->orig); | |
1e5d49fc | 1732 | ret = true; |
c6c8fea2 | 1733 | |
80b3f58c | 1734 | out_remove: |
c5caf4ef LL |
1735 | /* Do not remove multicast addresses from the local hash on |
1736 | * global additions | |
1737 | */ | |
1738 | if (is_multicast_ether_addr(tt_addr)) | |
1739 | goto out; | |
7f91d06c | 1740 | |
a73105b8 | 1741 | /* remove address from local hash if present */ |
c018ad3d | 1742 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1743 | "global tt received", |
c1d07431 | 1744 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1745 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1746 | ||
068ee6e2 AQ |
1747 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1748 | /* this is a normal global add. Therefore the client is not in a | |
1749 | * roaming state anymore. | |
1750 | */ | |
1751 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1752 | ||
7683fdc1 AQ |
1753 | out: |
1754 | if (tt_global_entry) | |
5dafd8a6 | 1755 | batadv_tt_global_entry_put(tt_global_entry); |
068ee6e2 | 1756 | if (tt_local_entry) |
95c0db90 | 1757 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 1758 | return ret; |
c6c8fea2 SE |
1759 | } |
1760 | ||
1b371d13 SW |
1761 | /** |
1762 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1763 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1764 | * @tt_global_entry: global translation table entry to be analyzed |
1765 | * | |
1766 | * This functon assumes the caller holds rcu_read_lock(). | |
62fe710f | 1767 | * Return: best originator list entry or NULL on errors. |
981d8900 SE |
1768 | */ |
1769 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1770 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1771 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1772 | { |
4627456a | 1773 | struct batadv_neigh_node *router, *best_router = NULL; |
29824a55 | 1774 | struct batadv_algo_ops *bao = bat_priv->algo_ops; |
981d8900 | 1775 | struct hlist_head *head; |
981d8900 | 1776 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1777 | |
1778 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1779 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1780 | router = batadv_orig_router_get(orig_entry->orig_node, |
1781 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1782 | if (!router) |
1783 | continue; | |
1784 | ||
4627456a | 1785 | if (best_router && |
29824a55 AQ |
1786 | bao->neigh.cmp(router, BATADV_IF_DEFAULT, best_router, |
1787 | BATADV_IF_DEFAULT) <= 0) { | |
25bb2509 | 1788 | batadv_neigh_node_put(router); |
4627456a | 1789 | continue; |
981d8900 SE |
1790 | } |
1791 | ||
4627456a AQ |
1792 | /* release the refcount for the "old" best */ |
1793 | if (best_router) | |
25bb2509 | 1794 | batadv_neigh_node_put(best_router); |
4627456a AQ |
1795 | |
1796 | best_entry = orig_entry; | |
1797 | best_router = router; | |
981d8900 SE |
1798 | } |
1799 | ||
4627456a | 1800 | if (best_router) |
25bb2509 | 1801 | batadv_neigh_node_put(best_router); |
4627456a | 1802 | |
981d8900 SE |
1803 | return best_entry; |
1804 | } | |
1805 | ||
dc1cbd14 | 1806 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
1b371d13 SW |
1807 | /** |
1808 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1809 | * for this global entry | |
4627456a | 1810 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1811 | * @tt_global_entry: global translation table entry to be printed |
1812 | * @seq: debugfs table seq_file struct | |
1813 | * | |
1814 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1815 | */ |
a513088d | 1816 | static void |
4627456a AQ |
1817 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1818 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1819 | struct seq_file *seq) |
db08e6e5 | 1820 | { |
981d8900 | 1821 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1822 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1823 | struct batadv_orig_node_vlan *vlan; |
1824 | struct hlist_head *head; | |
6b5e971a SE |
1825 | u8 last_ttvn; |
1826 | u16 flags; | |
db08e6e5 SW |
1827 | |
1828 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1829 | flags = tt_common_entry->flags; |
1830 | ||
4627456a | 1831 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1832 | if (best_entry) { |
7ea7b4a1 AQ |
1833 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1834 | tt_common_entry->vid); | |
1835 | if (!vlan) { | |
1836 | seq_printf(seq, | |
1837 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1838 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1839 | best_entry->orig_node->orig); | |
1840 | goto print_list; | |
1841 | } | |
1842 | ||
981d8900 | 1843 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1844 | seq_printf(seq, |
dd24ddb2 | 1845 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1846 | '*', tt_global_entry->common.addr, |
16052789 | 1847 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1848 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1849 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1850 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1851 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1852 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1853 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 | 1854 | |
21754e25 | 1855 | batadv_orig_node_vlan_put(vlan); |
981d8900 | 1856 | } |
db08e6e5 | 1857 | |
7ea7b4a1 | 1858 | print_list: |
db08e6e5 SW |
1859 | head = &tt_global_entry->orig_list; |
1860 | ||
b67bfe0d | 1861 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1862 | if (best_entry == orig_entry) |
1863 | continue; | |
1864 | ||
7ea7b4a1 AQ |
1865 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1866 | tt_common_entry->vid); | |
1867 | if (!vlan) { | |
1868 | seq_printf(seq, | |
1869 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1870 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1871 | orig_entry->orig_node->orig); | |
1872 | continue; | |
1873 | } | |
1874 | ||
db08e6e5 | 1875 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1876 | seq_printf(seq, |
dd24ddb2 | 1877 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1878 | '+', tt_global_entry->common.addr, |
16052789 | 1879 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1880 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1881 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1882 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1883 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1884 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1885 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 | 1886 | |
21754e25 | 1887 | batadv_orig_node_vlan_put(vlan); |
db08e6e5 SW |
1888 | } |
1889 | } | |
1890 | ||
08c36d3e | 1891 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1892 | { |
1893 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1894 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1895 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1896 | struct batadv_tt_common_entry *tt_common_entry; |
1897 | struct batadv_tt_global_entry *tt_global; | |
1898 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1899 | struct hlist_head *head; |
6b5e971a | 1900 | u32 i; |
c6c8fea2 | 1901 | |
30da63a6 ML |
1902 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1903 | if (!primary_if) | |
32ae9b22 | 1904 | goto out; |
c6c8fea2 | 1905 | |
2dafb49d AQ |
1906 | seq_printf(seq, |
1907 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1908 | net_dev->name); |
925a6f37 AQ |
1909 | seq_puts(seq, |
1910 | " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n"); | |
c6c8fea2 | 1911 | |
c6c8fea2 SE |
1912 | for (i = 0; i < hash->size; i++) { |
1913 | head = &hash->table[i]; | |
1914 | ||
7aadf889 | 1915 | rcu_read_lock(); |
b67bfe0d | 1916 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1917 | head, hash_entry) { |
56303d34 SE |
1918 | tt_global = container_of(tt_common_entry, |
1919 | struct batadv_tt_global_entry, | |
1920 | common); | |
4627456a | 1921 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1922 | } |
7aadf889 | 1923 | rcu_read_unlock(); |
c6c8fea2 | 1924 | } |
32ae9b22 ML |
1925 | out: |
1926 | if (primary_if) | |
82047ad7 | 1927 | batadv_hardif_put(primary_if); |
30da63a6 | 1928 | return 0; |
c6c8fea2 | 1929 | } |
dc1cbd14 | 1930 | #endif |
c6c8fea2 | 1931 | |
d34f0550 MS |
1932 | /** |
1933 | * batadv_tt_global_dump_subentry - Dump all TT local entries into a message | |
1934 | * @msg: Netlink message to dump into | |
1935 | * @portid: Port making netlink request | |
1936 | * @seq: Sequence number of netlink message | |
1937 | * @common: tt local & tt global common data | |
1938 | * @orig: Originator node announcing a non-mesh client | |
1939 | * @best: Is the best originator for the TT entry | |
1940 | * | |
1941 | * Return: Error code, or 0 on success | |
1942 | */ | |
1943 | static int | |
1944 | batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, | |
1945 | struct batadv_tt_common_entry *common, | |
1946 | struct batadv_tt_orig_list_entry *orig, | |
1947 | bool best) | |
1948 | { | |
1949 | void *hdr; | |
1950 | struct batadv_orig_node_vlan *vlan; | |
1951 | u8 last_ttvn; | |
1952 | u32 crc; | |
1953 | ||
1954 | vlan = batadv_orig_node_vlan_get(orig->orig_node, | |
1955 | common->vid); | |
1956 | if (!vlan) | |
1957 | return 0; | |
1958 | ||
1959 | crc = vlan->tt.crc; | |
1960 | ||
1961 | batadv_orig_node_vlan_put(vlan); | |
1962 | ||
1963 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
1964 | NLM_F_MULTI, | |
1965 | BATADV_CMD_GET_TRANSTABLE_GLOBAL); | |
1966 | if (!hdr) | |
1967 | return -ENOBUFS; | |
1968 | ||
1969 | last_ttvn = atomic_read(&orig->orig_node->last_ttvn); | |
1970 | ||
1971 | if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || | |
1972 | nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
1973 | orig->orig_node->orig) || | |
1974 | nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) || | |
1975 | nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) || | |
1976 | nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || | |
1977 | nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || | |
1978 | nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) | |
1979 | goto nla_put_failure; | |
1980 | ||
1981 | if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) | |
1982 | goto nla_put_failure; | |
1983 | ||
1984 | genlmsg_end(msg, hdr); | |
1985 | return 0; | |
1986 | ||
1987 | nla_put_failure: | |
1988 | genlmsg_cancel(msg, hdr); | |
1989 | return -EMSGSIZE; | |
1990 | } | |
1991 | ||
1992 | /** | |
1993 | * batadv_tt_global_dump_entry - Dump one TT global entry into a message | |
1994 | * @msg: Netlink message to dump into | |
1995 | * @portid: Port making netlink request | |
1996 | * @seq: Sequence number of netlink message | |
1997 | * @bat_priv: The bat priv with all the soft interface information | |
1998 | * @common: tt local & tt global common data | |
1999 | * @sub_s: Number of entries to skip | |
2000 | * | |
2001 | * This function assumes the caller holds rcu_read_lock(). | |
2002 | * | |
2003 | * Return: Error code, or 0 on success | |
2004 | */ | |
2005 | static int | |
2006 | batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
2007 | struct batadv_priv *bat_priv, | |
2008 | struct batadv_tt_common_entry *common, int *sub_s) | |
2009 | { | |
2010 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; | |
2011 | struct batadv_tt_global_entry *global; | |
2012 | struct hlist_head *head; | |
2013 | int sub = 0; | |
2014 | bool best; | |
2015 | ||
2016 | global = container_of(common, struct batadv_tt_global_entry, common); | |
2017 | best_entry = batadv_transtable_best_orig(bat_priv, global); | |
2018 | head = &global->orig_list; | |
2019 | ||
2020 | hlist_for_each_entry_rcu(orig_entry, head, list) { | |
2021 | if (sub++ < *sub_s) | |
2022 | continue; | |
2023 | ||
2024 | best = (orig_entry == best_entry); | |
2025 | ||
2026 | if (batadv_tt_global_dump_subentry(msg, portid, seq, common, | |
2027 | orig_entry, best)) { | |
2028 | *sub_s = sub - 1; | |
2029 | return -EMSGSIZE; | |
2030 | } | |
2031 | } | |
2032 | ||
2033 | *sub_s = 0; | |
2034 | return 0; | |
2035 | } | |
2036 | ||
2037 | /** | |
2038 | * batadv_tt_global_dump_bucket - Dump one TT local bucket into a message | |
2039 | * @msg: Netlink message to dump into | |
2040 | * @portid: Port making netlink request | |
2041 | * @seq: Sequence number of netlink message | |
2042 | * @bat_priv: The bat priv with all the soft interface information | |
2043 | * @head: Pointer to the list containing the global tt entries | |
2044 | * @idx_s: Number of entries to skip | |
2045 | * @sub: Number of entries to skip | |
2046 | * | |
2047 | * Return: Error code, or 0 on success | |
2048 | */ | |
2049 | static int | |
2050 | batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
2051 | struct batadv_priv *bat_priv, | |
2052 | struct hlist_head *head, int *idx_s, int *sub) | |
2053 | { | |
2054 | struct batadv_tt_common_entry *common; | |
2055 | int idx = 0; | |
2056 | ||
2057 | rcu_read_lock(); | |
2058 | hlist_for_each_entry_rcu(common, head, hash_entry) { | |
2059 | if (idx++ < *idx_s) | |
2060 | continue; | |
2061 | ||
2062 | if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv, | |
2063 | common, sub)) { | |
2064 | rcu_read_unlock(); | |
2065 | *idx_s = idx - 1; | |
2066 | return -EMSGSIZE; | |
2067 | } | |
2068 | } | |
2069 | rcu_read_unlock(); | |
2070 | ||
2071 | *idx_s = 0; | |
2072 | *sub = 0; | |
2073 | return 0; | |
2074 | } | |
2075 | ||
2076 | /** | |
2077 | * batadv_tt_global_dump - Dump TT global entries into a message | |
2078 | * @msg: Netlink message to dump into | |
2079 | * @cb: Parameters from query | |
2080 | * | |
2081 | * Return: Error code, or length of message on success | |
2082 | */ | |
2083 | int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
2084 | { | |
2085 | struct net *net = sock_net(cb->skb->sk); | |
2086 | struct net_device *soft_iface; | |
2087 | struct batadv_priv *bat_priv; | |
2088 | struct batadv_hard_iface *primary_if = NULL; | |
2089 | struct batadv_hashtable *hash; | |
2090 | struct hlist_head *head; | |
2091 | int ret; | |
2092 | int ifindex; | |
2093 | int bucket = cb->args[0]; | |
2094 | int idx = cb->args[1]; | |
2095 | int sub = cb->args[2]; | |
2096 | int portid = NETLINK_CB(cb->skb).portid; | |
2097 | ||
2098 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
2099 | if (!ifindex) | |
2100 | return -EINVAL; | |
2101 | ||
2102 | soft_iface = dev_get_by_index(net, ifindex); | |
2103 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
2104 | ret = -ENODEV; | |
2105 | goto out; | |
2106 | } | |
2107 | ||
2108 | bat_priv = netdev_priv(soft_iface); | |
2109 | ||
2110 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2111 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { | |
2112 | ret = -ENOENT; | |
2113 | goto out; | |
2114 | } | |
2115 | ||
2116 | hash = bat_priv->tt.global_hash; | |
2117 | ||
2118 | while (bucket < hash->size) { | |
2119 | head = &hash->table[bucket]; | |
2120 | ||
2121 | if (batadv_tt_global_dump_bucket(msg, portid, | |
2122 | cb->nlh->nlmsg_seq, bat_priv, | |
2123 | head, &idx, &sub)) | |
2124 | break; | |
2125 | ||
2126 | bucket++; | |
2127 | } | |
2128 | ||
2129 | ret = msg->len; | |
2130 | ||
2131 | out: | |
2132 | if (primary_if) | |
2133 | batadv_hardif_put(primary_if); | |
2134 | if (soft_iface) | |
2135 | dev_put(soft_iface); | |
2136 | ||
2137 | cb->args[0] = bucket; | |
2138 | cb->args[1] = idx; | |
2139 | cb->args[2] = sub; | |
2140 | ||
2141 | return ret; | |
2142 | } | |
2143 | ||
1d8ab8d3 | 2144 | /** |
433ff98f | 2145 | * _batadv_tt_global_del_orig_entry - remove and free an orig_entry |
1d8ab8d3 LL |
2146 | * @tt_global_entry: the global entry to remove the orig_entry from |
2147 | * @orig_entry: the orig entry to remove and free | |
2148 | * | |
2149 | * Remove an orig_entry from its list in the given tt_global_entry and | |
2150 | * free this orig_entry afterwards. | |
433ff98f ML |
2151 | * |
2152 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
2153 | * part of a list. | |
1d8ab8d3 LL |
2154 | */ |
2155 | static void | |
433ff98f ML |
2156 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
2157 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 2158 | { |
2c72d655 SE |
2159 | lockdep_assert_held(&tt_global_entry->list_lock); |
2160 | ||
1d8ab8d3 LL |
2161 | batadv_tt_global_size_dec(orig_entry->orig_node, |
2162 | tt_global_entry->common.vid); | |
2163 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
2164 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
2165 | * being part of a list | |
2166 | */ | |
1d8ab8d3 | 2167 | hlist_del_rcu(&orig_entry->list); |
7e2366c6 | 2168 | batadv_tt_orig_list_entry_put(orig_entry); |
1d8ab8d3 LL |
2169 | } |
2170 | ||
db08e6e5 | 2171 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 2172 | static void |
56303d34 | 2173 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 2174 | { |
db08e6e5 | 2175 | struct hlist_head *head; |
b67bfe0d | 2176 | struct hlist_node *safe; |
56303d34 | 2177 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 2178 | |
db08e6e5 SW |
2179 | spin_lock_bh(&tt_global_entry->list_lock); |
2180 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 2181 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 2182 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 2183 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
2184 | } |
2185 | ||
1d8ab8d3 LL |
2186 | /** |
2187 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
2188 | * @bat_priv: the bat priv with all the soft interface information | |
2189 | * @tt_global_entry: the global entry to remove the orig_node from | |
2190 | * @orig_node: the originator announcing the client | |
2191 | * @message: message to append to the log on deletion | |
2192 | * | |
2193 | * Remove the given orig_node and its according orig_entry from the given | |
2194 | * global tt entry. | |
2195 | */ | |
a513088d | 2196 | static void |
1d8ab8d3 LL |
2197 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
2198 | struct batadv_tt_global_entry *tt_global_entry, | |
2199 | struct batadv_orig_node *orig_node, | |
2200 | const char *message) | |
db08e6e5 SW |
2201 | { |
2202 | struct hlist_head *head; | |
b67bfe0d | 2203 | struct hlist_node *safe; |
56303d34 | 2204 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 2205 | unsigned short vid; |
db08e6e5 SW |
2206 | |
2207 | spin_lock_bh(&tt_global_entry->list_lock); | |
2208 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 2209 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 2210 | if (orig_entry->orig_node == orig_node) { |
16052789 | 2211 | vid = tt_global_entry->common.vid; |
39c75a51 | 2212 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 2213 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 2214 | orig_node->orig, |
16052789 AQ |
2215 | tt_global_entry->common.addr, |
2216 | BATADV_PRINT_VID(vid), message); | |
433ff98f ML |
2217 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
2218 | orig_entry); | |
db08e6e5 SW |
2219 | } |
2220 | } | |
2221 | spin_unlock_bh(&tt_global_entry->list_lock); | |
2222 | } | |
2223 | ||
db08e6e5 | 2224 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
2225 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
2226 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 2227 | */ |
a513088d | 2228 | static void |
56303d34 SE |
2229 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
2230 | struct batadv_tt_global_entry *tt_global_entry, | |
2231 | struct batadv_orig_node *orig_node, | |
2232 | const char *message) | |
db08e6e5 SW |
2233 | { |
2234 | bool last_entry = true; | |
2235 | struct hlist_head *head; | |
56303d34 | 2236 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
2237 | |
2238 | /* no local entry exists, case 1: | |
2239 | * Check if this is the last one or if other entries exist. | |
2240 | */ | |
2241 | ||
2242 | rcu_read_lock(); | |
2243 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 2244 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
2245 | if (orig_entry->orig_node != orig_node) { |
2246 | last_entry = false; | |
2247 | break; | |
2248 | } | |
2249 | } | |
2250 | rcu_read_unlock(); | |
2251 | ||
2252 | if (last_entry) { | |
2253 | /* its the last one, mark for roaming. */ | |
acd34afa | 2254 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
2255 | tt_global_entry->roam_at = jiffies; |
2256 | } else | |
2257 | /* there is another entry, we can simply delete this | |
2258 | * one and can still use the other one. | |
2259 | */ | |
1d8ab8d3 LL |
2260 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
2261 | orig_node, message); | |
db08e6e5 SW |
2262 | } |
2263 | ||
c018ad3d AQ |
2264 | /** |
2265 | * batadv_tt_global_del - remove a client from the global table | |
2266 | * @bat_priv: the bat priv with all the soft interface information | |
2267 | * @orig_node: an originator serving this client | |
2268 | * @addr: the mac address of the client | |
2269 | * @vid: VLAN identifier | |
2270 | * @message: a message explaining the reason for deleting the client to print | |
2271 | * for debugging purpose | |
2272 | * @roaming: true if the deletion has been triggered by a roaming event | |
2273 | */ | |
56303d34 SE |
2274 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
2275 | struct batadv_orig_node *orig_node, | |
c018ad3d | 2276 | const unsigned char *addr, unsigned short vid, |
a513088d | 2277 | const char *message, bool roaming) |
a73105b8 | 2278 | { |
170173bf | 2279 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 2280 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 2281 | |
c018ad3d | 2282 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 2283 | if (!tt_global_entry) |
7683fdc1 | 2284 | goto out; |
a73105b8 | 2285 | |
db08e6e5 | 2286 | if (!roaming) { |
1d8ab8d3 LL |
2287 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
2288 | orig_node, message); | |
db08e6e5 SW |
2289 | |
2290 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
2291 | batadv_tt_global_free(bat_priv, tt_global_entry, |
2292 | message); | |
db08e6e5 SW |
2293 | |
2294 | goto out; | |
2295 | } | |
92f90f56 SE |
2296 | |
2297 | /* if we are deleting a global entry due to a roam | |
2298 | * event, there are two possibilities: | |
db08e6e5 SW |
2299 | * 1) the client roamed from node A to node B => if there |
2300 | * is only one originator left for this client, we mark | |
acd34afa | 2301 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
2302 | * wait for node B to claim it. In case of timeout |
2303 | * the entry is purged. | |
db08e6e5 SW |
2304 | * |
2305 | * If there are other originators left, we directly delete | |
2306 | * the originator. | |
92f90f56 | 2307 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
2308 | * the global entry, since it is useless now. |
2309 | */ | |
a513088d | 2310 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
2311 | tt_global_entry->common.addr, |
2312 | vid); | |
a513088d | 2313 | if (local_entry) { |
db08e6e5 | 2314 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 2315 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 2316 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
2317 | } else |
2318 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
2319 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
2320 | orig_node, message); | |
92f90f56 | 2321 | |
cc47f66e | 2322 | out: |
7683fdc1 | 2323 | if (tt_global_entry) |
5dafd8a6 | 2324 | batadv_tt_global_entry_put(tt_global_entry); |
a513088d | 2325 | if (local_entry) |
95c0db90 | 2326 | batadv_tt_local_entry_put(local_entry); |
a73105b8 AQ |
2327 | } |
2328 | ||
95fb130d AQ |
2329 | /** |
2330 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
2331 | * given originator matching the provided vid | |
2332 | * @bat_priv: the bat priv with all the soft interface information | |
2333 | * @orig_node: the originator owning the entries to remove | |
2334 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
2335 | * removed | |
2336 | * @message: debug message to print as "reason" | |
2337 | */ | |
56303d34 SE |
2338 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
2339 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2340 | s32 match_vid, |
56303d34 | 2341 | const char *message) |
c6c8fea2 | 2342 | { |
56303d34 SE |
2343 | struct batadv_tt_global_entry *tt_global; |
2344 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 2345 | u32 i; |
807736f6 | 2346 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 2347 | struct hlist_node *safe; |
a73105b8 | 2348 | struct hlist_head *head; |
7683fdc1 | 2349 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 2350 | unsigned short vid; |
c6c8fea2 | 2351 | |
6e801494 SW |
2352 | if (!hash) |
2353 | return; | |
2354 | ||
a73105b8 AQ |
2355 | for (i = 0; i < hash->size; i++) { |
2356 | head = &hash->table[i]; | |
7683fdc1 | 2357 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 2358 | |
7683fdc1 | 2359 | spin_lock_bh(list_lock); |
b67bfe0d | 2360 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 2361 | head, hash_entry) { |
95fb130d AQ |
2362 | /* remove only matching entries */ |
2363 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
2364 | continue; | |
2365 | ||
56303d34 SE |
2366 | tt_global = container_of(tt_common_entry, |
2367 | struct batadv_tt_global_entry, | |
2368 | common); | |
db08e6e5 | 2369 | |
1d8ab8d3 LL |
2370 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
2371 | orig_node, message); | |
db08e6e5 | 2372 | |
56303d34 | 2373 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 2374 | vid = tt_global->common.vid; |
39c75a51 | 2375 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2376 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2377 | tt_global->common.addr, | |
2378 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 2379 | hlist_del_rcu(&tt_common_entry->hash_entry); |
5dafd8a6 | 2380 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 | 2381 | } |
a73105b8 | 2382 | } |
7683fdc1 | 2383 | spin_unlock_bh(list_lock); |
c6c8fea2 | 2384 | } |
ac4eebd4 | 2385 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
2386 | } |
2387 | ||
30cfd02b AQ |
2388 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
2389 | char **msg) | |
cc47f66e | 2390 | { |
30cfd02b AQ |
2391 | bool purge = false; |
2392 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
2393 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 2394 | |
30cfd02b AQ |
2395 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
2396 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
2397 | purge = true; | |
2398 | *msg = "Roaming timeout\n"; | |
2399 | } | |
42d0b044 | 2400 | |
30cfd02b AQ |
2401 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
2402 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
2403 | purge = true; | |
2404 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 2405 | } |
30cfd02b AQ |
2406 | |
2407 | return purge; | |
42d0b044 SE |
2408 | } |
2409 | ||
30cfd02b | 2410 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 2411 | { |
807736f6 | 2412 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 2413 | struct hlist_head *head; |
b67bfe0d | 2414 | struct hlist_node *node_tmp; |
7683fdc1 | 2415 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 2416 | u32 i; |
30cfd02b AQ |
2417 | char *msg = NULL; |
2418 | struct batadv_tt_common_entry *tt_common; | |
2419 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 2420 | |
cc47f66e AQ |
2421 | for (i = 0; i < hash->size; i++) { |
2422 | head = &hash->table[i]; | |
7683fdc1 | 2423 | list_lock = &hash->list_locks[i]; |
cc47f66e | 2424 | |
7683fdc1 | 2425 | spin_lock_bh(list_lock); |
b67bfe0d | 2426 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
2427 | hash_entry) { |
2428 | tt_global = container_of(tt_common, | |
2429 | struct batadv_tt_global_entry, | |
2430 | common); | |
2431 | ||
2432 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
2433 | continue; | |
2434 | ||
2435 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
2436 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2437 | tt_global->common.addr, | |
2438 | BATADV_PRINT_VID(tt_global->common.vid), | |
2439 | msg); | |
30cfd02b | 2440 | |
b67bfe0d | 2441 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b | 2442 | |
5dafd8a6 | 2443 | batadv_tt_global_entry_put(tt_global); |
30cfd02b | 2444 | } |
7683fdc1 | 2445 | spin_unlock_bh(list_lock); |
cc47f66e | 2446 | } |
cc47f66e AQ |
2447 | } |
2448 | ||
56303d34 | 2449 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 2450 | { |
5bf74e9c | 2451 | struct batadv_hashtable *hash; |
7683fdc1 | 2452 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
2453 | struct batadv_tt_common_entry *tt_common_entry; |
2454 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 2455 | struct hlist_node *node_tmp; |
7683fdc1 | 2456 | struct hlist_head *head; |
6b5e971a | 2457 | u32 i; |
7683fdc1 | 2458 | |
807736f6 | 2459 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
2460 | return; |
2461 | ||
807736f6 | 2462 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
2463 | |
2464 | for (i = 0; i < hash->size; i++) { | |
2465 | head = &hash->table[i]; | |
2466 | list_lock = &hash->list_locks[i]; | |
2467 | ||
2468 | spin_lock_bh(list_lock); | |
b67bfe0d | 2469 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 2470 | head, hash_entry) { |
b67bfe0d | 2471 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
2472 | tt_global = container_of(tt_common_entry, |
2473 | struct batadv_tt_global_entry, | |
2474 | common); | |
5dafd8a6 | 2475 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 AQ |
2476 | } |
2477 | spin_unlock_bh(list_lock); | |
2478 | } | |
2479 | ||
1a8eaf07 | 2480 | batadv_hash_destroy(hash); |
7683fdc1 | 2481 | |
807736f6 | 2482 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2483 | } |
2484 | ||
56303d34 SE |
2485 | static bool |
2486 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2487 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
2488 | { |
2489 | bool ret = false; | |
2490 | ||
acd34afa SE |
2491 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2492 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
2493 | ret = true; |
2494 | ||
2d2fcc2a AQ |
2495 | /* check if the two clients are marked as isolated */ |
2496 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2497 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
2498 | ret = true; | |
2499 | ||
59b699cd AQ |
2500 | return ret; |
2501 | } | |
2502 | ||
c018ad3d AQ |
2503 | /** |
2504 | * batadv_transtable_search - get the mesh destination for a given client | |
2505 | * @bat_priv: the bat priv with all the soft interface information | |
2506 | * @src: mac address of the source client | |
2507 | * @addr: mac address of the destination client | |
2508 | * @vid: VLAN identifier | |
2509 | * | |
62fe710f | 2510 | * Return: a pointer to the originator that was selected as destination in the |
c018ad3d AQ |
2511 | * mesh for contacting the client 'addr', NULL otherwise. |
2512 | * In case of multiple originators serving the same client, the function returns | |
2513 | * the best one (best in terms of metric towards the destination node). | |
2514 | * | |
2515 | * If the two clients are AP isolated the function returns NULL. | |
2516 | */ | |
56303d34 | 2517 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2518 | const u8 *src, |
2519 | const u8 *addr, | |
c018ad3d | 2520 | unsigned short vid) |
c6c8fea2 | 2521 | { |
56303d34 SE |
2522 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2523 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2524 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2525 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2526 | |
eceb22ae | 2527 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2528 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2529 | if (!tt_local_entry || |
2530 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2531 | goto out; |
2532 | } | |
7aadf889 | 2533 | |
c018ad3d | 2534 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2535 | if (!tt_global_entry) |
7b36e8ee | 2536 | goto out; |
7aadf889 | 2537 | |
3d393e47 | 2538 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2539 | * isolation |
2540 | */ | |
a513088d SE |
2541 | if (tt_local_entry && |
2542 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2543 | goto out; |
2544 | ||
db08e6e5 | 2545 | rcu_read_lock(); |
4627456a | 2546 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2547 | /* found anything? */ |
981d8900 SE |
2548 | if (best_entry) |
2549 | orig_node = best_entry->orig_node; | |
7c124391 | 2550 | if (orig_node && !kref_get_unless_zero(&orig_node->refcount)) |
db08e6e5 SW |
2551 | orig_node = NULL; |
2552 | rcu_read_unlock(); | |
981d8900 | 2553 | |
7b36e8ee | 2554 | out: |
3d393e47 | 2555 | if (tt_global_entry) |
5dafd8a6 | 2556 | batadv_tt_global_entry_put(tt_global_entry); |
3d393e47 | 2557 | if (tt_local_entry) |
95c0db90 | 2558 | batadv_tt_local_entry_put(tt_local_entry); |
3d393e47 | 2559 | |
7b36e8ee | 2560 | return orig_node; |
c6c8fea2 | 2561 | } |
a73105b8 | 2562 | |
ced72933 AQ |
2563 | /** |
2564 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2565 | * to the given orig_node | |
2566 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2567 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2568 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2569 | * |
2570 | * This function computes the checksum for the global table corresponding to a | |
2571 | * specific originator. In particular, the checksum is computed as follows: For | |
2572 | * each client connected to the originator the CRC32C of the MAC address and the | |
2573 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2574 | * together. | |
2575 | * | |
2576 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2577 | * produce a unique hash of the table, but since the order which is used to feed | |
2578 | * the CRC32C function affects the result and since every node in the network | |
2579 | * probably sorts the clients differently, the hash function cannot be directly | |
2580 | * computed over the entire table. Hence the CRC32C is used only on | |
2581 | * the single client entry, while all the results are then xor'ed together | |
2582 | * because the XOR operation can combine them all while trying to reduce the | |
2583 | * noise as much as possible. | |
2584 | * | |
62fe710f | 2585 | * Return: the checksum of the global table of a given originator. |
ced72933 | 2586 | */ |
6b5e971a SE |
2587 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2588 | struct batadv_orig_node *orig_node, | |
2589 | unsigned short vid) | |
a73105b8 | 2590 | { |
807736f6 | 2591 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2592 | struct batadv_tt_common_entry *tt_common; |
2593 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2594 | struct hlist_head *head; |
6b5e971a SE |
2595 | u32 i, crc_tmp, crc = 0; |
2596 | u8 flags; | |
a30e22ca | 2597 | __be16 tmp_vid; |
a73105b8 AQ |
2598 | |
2599 | for (i = 0; i < hash->size; i++) { | |
2600 | head = &hash->table[i]; | |
2601 | ||
2602 | rcu_read_lock(); | |
b67bfe0d | 2603 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2604 | tt_global = container_of(tt_common, |
2605 | struct batadv_tt_global_entry, | |
2606 | common); | |
7ea7b4a1 AQ |
2607 | /* compute the CRC only for entries belonging to the |
2608 | * VLAN identified by the vid passed as parameter | |
2609 | */ | |
2610 | if (tt_common->vid != vid) | |
2611 | continue; | |
2612 | ||
db08e6e5 SW |
2613 | /* Roaming clients are in the global table for |
2614 | * consistency only. They don't have to be | |
2615 | * taken into account while computing the | |
2616 | * global crc | |
2617 | */ | |
acd34afa | 2618 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2619 | continue; |
30cfd02b AQ |
2620 | /* Temporary clients have not been announced yet, so |
2621 | * they have to be skipped while computing the global | |
2622 | * crc | |
2623 | */ | |
2624 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2625 | continue; | |
db08e6e5 SW |
2626 | |
2627 | /* find out if this global entry is announced by this | |
2628 | * originator | |
2629 | */ | |
56303d34 | 2630 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2631 | orig_node)) |
db08e6e5 SW |
2632 | continue; |
2633 | ||
a30e22ca AQ |
2634 | /* use network order to read the VID: this ensures that |
2635 | * every node reads the bytes in the same order. | |
2636 | */ | |
2637 | tmp_vid = htons(tt_common->vid); | |
2638 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2639 | |
2640 | /* compute the CRC on flags that have to be kept in sync | |
2641 | * among nodes | |
2642 | */ | |
2643 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2644 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2645 | ||
0ffa9e8d | 2646 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2647 | } |
2648 | rcu_read_unlock(); | |
2649 | } | |
2650 | ||
ced72933 | 2651 | return crc; |
a73105b8 AQ |
2652 | } |
2653 | ||
ced72933 AQ |
2654 | /** |
2655 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2656 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2657 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2658 | * |
2659 | * For details about the computation, please refer to the documentation for | |
2660 | * batadv_tt_global_crc(). | |
2661 | * | |
62fe710f | 2662 | * Return: the checksum of the local table |
ced72933 | 2663 | */ |
6b5e971a SE |
2664 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2665 | unsigned short vid) | |
a73105b8 | 2666 | { |
807736f6 | 2667 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2668 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2669 | struct hlist_head *head; |
6b5e971a SE |
2670 | u32 i, crc_tmp, crc = 0; |
2671 | u8 flags; | |
a30e22ca | 2672 | __be16 tmp_vid; |
a73105b8 AQ |
2673 | |
2674 | for (i = 0; i < hash->size; i++) { | |
2675 | head = &hash->table[i]; | |
2676 | ||
2677 | rcu_read_lock(); | |
b67bfe0d | 2678 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2679 | /* compute the CRC only for entries belonging to the |
2680 | * VLAN identified by vid | |
2681 | */ | |
2682 | if (tt_common->vid != vid) | |
2683 | continue; | |
2684 | ||
058d0e26 | 2685 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2686 | * account while computing the CRC |
2687 | */ | |
acd34afa | 2688 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2689 | continue; |
ced72933 | 2690 | |
a30e22ca AQ |
2691 | /* use network order to read the VID: this ensures that |
2692 | * every node reads the bytes in the same order. | |
2693 | */ | |
2694 | tmp_vid = htons(tt_common->vid); | |
2695 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2696 | |
2697 | /* compute the CRC on flags that have to be kept in sync | |
2698 | * among nodes | |
2699 | */ | |
2700 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2701 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2702 | ||
0ffa9e8d | 2703 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2704 | } |
a73105b8 AQ |
2705 | rcu_read_unlock(); |
2706 | } | |
2707 | ||
ced72933 | 2708 | return crc; |
a73105b8 AQ |
2709 | } |
2710 | ||
9c4604a2 SE |
2711 | /** |
2712 | * batadv_tt_req_node_release - free tt_req node entry | |
2713 | * @ref: kref pointer of the tt req_node entry | |
2714 | */ | |
2715 | static void batadv_tt_req_node_release(struct kref *ref) | |
2716 | { | |
2717 | struct batadv_tt_req_node *tt_req_node; | |
2718 | ||
2719 | tt_req_node = container_of(ref, struct batadv_tt_req_node, refcount); | |
2720 | ||
86452f81 | 2721 | kmem_cache_free(batadv_tt_req_cache, tt_req_node); |
9c4604a2 SE |
2722 | } |
2723 | ||
2724 | /** | |
2725 | * batadv_tt_req_node_put - decrement the tt_req_node refcounter and | |
2726 | * possibly release it | |
2727 | * @tt_req_node: tt_req_node to be free'd | |
2728 | */ | |
2729 | static void batadv_tt_req_node_put(struct batadv_tt_req_node *tt_req_node) | |
2730 | { | |
2731 | kref_put(&tt_req_node->refcount, batadv_tt_req_node_release); | |
2732 | } | |
2733 | ||
56303d34 | 2734 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2735 | { |
7c26a53b ML |
2736 | struct batadv_tt_req_node *node; |
2737 | struct hlist_node *safe; | |
a73105b8 | 2738 | |
807736f6 | 2739 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2740 | |
7c26a53b ML |
2741 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2742 | hlist_del_init(&node->list); | |
9c4604a2 | 2743 | batadv_tt_req_node_put(node); |
a73105b8 AQ |
2744 | } |
2745 | ||
807736f6 | 2746 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2747 | } |
2748 | ||
56303d34 SE |
2749 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2750 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2751 | const void *tt_buff, |
6b5e971a | 2752 | u16 tt_buff_len) |
a73105b8 | 2753 | { |
a73105b8 | 2754 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2755 | * last OGM (the OGM could carry no changes) |
2756 | */ | |
a73105b8 AQ |
2757 | spin_lock_bh(&orig_node->tt_buff_lock); |
2758 | if (tt_buff_len > 0) { | |
2759 | kfree(orig_node->tt_buff); | |
2760 | orig_node->tt_buff_len = 0; | |
2761 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2762 | if (orig_node->tt_buff) { | |
2763 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2764 | orig_node->tt_buff_len = tt_buff_len; | |
2765 | } | |
2766 | } | |
2767 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2768 | } | |
2769 | ||
56303d34 | 2770 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2771 | { |
7c26a53b ML |
2772 | struct batadv_tt_req_node *node; |
2773 | struct hlist_node *safe; | |
a73105b8 | 2774 | |
807736f6 | 2775 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2776 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2777 | if (batadv_has_timed_out(node->issued_at, |
2778 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2779 | hlist_del_init(&node->list); |
9c4604a2 | 2780 | batadv_tt_req_node_put(node); |
a73105b8 AQ |
2781 | } |
2782 | } | |
807736f6 | 2783 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2784 | } |
2785 | ||
383b8636 ML |
2786 | /** |
2787 | * batadv_tt_req_node_new - search and possibly create a tt_req_node object | |
2788 | * @bat_priv: the bat priv with all the soft interface information | |
2789 | * @orig_node: orig node this request is being issued for | |
2790 | * | |
62fe710f | 2791 | * Return: the pointer to the new tt_req_node struct if no request |
383b8636 | 2792 | * has already been issued for this orig_node, NULL otherwise. |
9cfc7bd6 | 2793 | */ |
56303d34 | 2794 | static struct batadv_tt_req_node * |
383b8636 | 2795 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2796 | struct batadv_orig_node *orig_node) |
a73105b8 | 2797 | { |
56303d34 | 2798 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2799 | |
807736f6 | 2800 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2801 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2802 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2803 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2804 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2805 | goto unlock; |
2806 | } | |
2807 | ||
86452f81 | 2808 | tt_req_node = kmem_cache_alloc(batadv_tt_req_cache, GFP_ATOMIC); |
a73105b8 AQ |
2809 | if (!tt_req_node) |
2810 | goto unlock; | |
2811 | ||
9c4604a2 | 2812 | kref_init(&tt_req_node->refcount); |
8fdd0153 | 2813 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2814 | tt_req_node->issued_at = jiffies; |
2815 | ||
9c4604a2 | 2816 | kref_get(&tt_req_node->refcount); |
7c26a53b | 2817 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2818 | unlock: |
807736f6 | 2819 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2820 | return tt_req_node; |
2821 | } | |
2822 | ||
335fbe0f ML |
2823 | /** |
2824 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2825 | * @entry_ptr: to be checked local tt entry | |
2826 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2827 | * | |
4b426b10 | 2828 | * Return: true if the entry is a valid, false otherwise. |
335fbe0f | 2829 | */ |
4b426b10 | 2830 | static bool batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) |
058d0e26 | 2831 | { |
56303d34 | 2832 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2833 | |
acd34afa | 2834 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
4b426b10 SE |
2835 | return false; |
2836 | return true; | |
058d0e26 AQ |
2837 | } |
2838 | ||
4b426b10 SE |
2839 | static bool batadv_tt_global_valid(const void *entry_ptr, |
2840 | const void *data_ptr) | |
a73105b8 | 2841 | { |
56303d34 SE |
2842 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2843 | const struct batadv_tt_global_entry *tt_global_entry; | |
2844 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2845 | |
30cfd02b AQ |
2846 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2847 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
4b426b10 | 2848 | return false; |
cc47f66e | 2849 | |
56303d34 SE |
2850 | tt_global_entry = container_of(tt_common_entry, |
2851 | struct batadv_tt_global_entry, | |
48100bac AQ |
2852 | common); |
2853 | ||
a513088d | 2854 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2855 | } |
2856 | ||
335fbe0f | 2857 | /** |
7ea7b4a1 AQ |
2858 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2859 | * specified tt hash | |
335fbe0f ML |
2860 | * @bat_priv: the bat priv with all the soft interface information |
2861 | * @hash: hash table containing the tt entries | |
2862 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2863 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2864 | * @valid_cb: function to filter tt change entries |
2865 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2866 | */ |
7ea7b4a1 AQ |
2867 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2868 | struct batadv_hashtable *hash, | |
6b5e971a | 2869 | void *tvlv_buff, u16 tt_len, |
4b426b10 SE |
2870 | bool (*valid_cb)(const void *, |
2871 | const void *), | |
7ea7b4a1 | 2872 | void *cb_data) |
a73105b8 | 2873 | { |
56303d34 | 2874 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2875 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2876 | struct hlist_head *head; |
6b5e971a SE |
2877 | u16 tt_tot, tt_num_entries = 0; |
2878 | u32 i; | |
a73105b8 | 2879 | |
298e6e68 | 2880 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2881 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2882 | |
2883 | rcu_read_lock(); | |
2884 | for (i = 0; i < hash->size; i++) { | |
2885 | head = &hash->table[i]; | |
2886 | ||
b67bfe0d | 2887 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2888 | head, hash_entry) { |
335fbe0f | 2889 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2890 | break; |
2891 | ||
48100bac | 2892 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2893 | continue; |
2894 | ||
8fdd0153 | 2895 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2896 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2897 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2898 | memset(tt_change->reserved, 0, |
2899 | sizeof(tt_change->reserved)); | |
a73105b8 | 2900 | |
335fbe0f | 2901 | tt_num_entries++; |
a73105b8 AQ |
2902 | tt_change++; |
2903 | } | |
2904 | } | |
2905 | rcu_read_unlock(); | |
7ea7b4a1 | 2906 | } |
a73105b8 | 2907 | |
7ea7b4a1 AQ |
2908 | /** |
2909 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2910 | * @orig_node: originator for which the CRCs have to be checked | |
2911 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2912 | * @num_vlan: number of tvlv VLAN entries | |
7ea7b4a1 | 2913 | * |
62fe710f | 2914 | * Return: true if all the received CRCs match the locally stored ones, false |
7ea7b4a1 AQ |
2915 | * otherwise |
2916 | */ | |
2917 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2918 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2919 | u16 num_vlan) |
7ea7b4a1 AQ |
2920 | { |
2921 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2922 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 2923 | int i, orig_num_vlan; |
6b5e971a | 2924 | u32 crc; |
7ea7b4a1 AQ |
2925 | |
2926 | /* check if each received CRC matches the locally stored one */ | |
2927 | for (i = 0; i < num_vlan; i++) { | |
2928 | tt_vlan_tmp = tt_vlan + i; | |
2929 | ||
2930 | /* if orig_node is a backbone node for this VLAN, don't check | |
2931 | * the CRC as we ignore all the global entries over it | |
2932 | */ | |
2933 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2934 | orig_node->orig, |
2935 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2936 | continue; |
2937 | ||
2938 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2939 | ntohs(tt_vlan_tmp->vid)); | |
2940 | if (!vlan) | |
2941 | return false; | |
2942 | ||
91c2b1a9 | 2943 | crc = vlan->tt.crc; |
21754e25 | 2944 | batadv_orig_node_vlan_put(vlan); |
91c2b1a9 AQ |
2945 | |
2946 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2947 | return false; |
2948 | } | |
2949 | ||
c169c59d SW |
2950 | /* check if any excess VLANs exist locally for the originator |
2951 | * which are not mentioned in the TVLV from the originator. | |
2952 | */ | |
2953 | rcu_read_lock(); | |
2954 | orig_num_vlan = 0; | |
2955 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
2956 | orig_num_vlan++; | |
2957 | rcu_read_unlock(); | |
2958 | ||
2959 | if (orig_num_vlan > num_vlan) | |
2960 | return false; | |
2961 | ||
7ea7b4a1 AQ |
2962 | return true; |
2963 | } | |
2964 | ||
2965 | /** | |
2966 | * batadv_tt_local_update_crc - update all the local CRCs | |
2967 | * @bat_priv: the bat priv with all the soft interface information | |
2968 | */ | |
2969 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2970 | { | |
2971 | struct batadv_softif_vlan *vlan; | |
2972 | ||
2973 | /* recompute the global CRC for each VLAN */ | |
2974 | rcu_read_lock(); | |
2975 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2976 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2977 | } | |
2978 | rcu_read_unlock(); | |
2979 | } | |
2980 | ||
2981 | /** | |
2982 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2983 | * @bat_priv: the bat priv with all the soft interface information | |
2984 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2985 | */ | |
2986 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2987 | struct batadv_orig_node *orig_node) | |
2988 | { | |
2989 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2990 | u32 crc; |
7ea7b4a1 AQ |
2991 | |
2992 | /* recompute the global CRC for each VLAN */ | |
2993 | rcu_read_lock(); | |
d0fa4f3f | 2994 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
2995 | /* if orig_node is a backbone node for this VLAN, don't compute |
2996 | * the CRC as we ignore all the global entries over it | |
2997 | */ | |
cfd4f757 AQ |
2998 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2999 | vlan->vid)) | |
7ea7b4a1 AQ |
3000 | continue; |
3001 | ||
3002 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
3003 | vlan->tt.crc = crc; | |
3004 | } | |
3005 | rcu_read_unlock(); | |
a73105b8 AQ |
3006 | } |
3007 | ||
ced72933 AQ |
3008 | /** |
3009 | * batadv_send_tt_request - send a TT Request message to a given node | |
3010 | * @bat_priv: the bat priv with all the soft interface information | |
3011 | * @dst_orig_node: the destination of the message | |
3012 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
3013 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
3014 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
3015 | * @full_table: ask for the entire translation table if true, while only for the |
3016 | * last TT diff otherwise | |
d15cd622 AQ |
3017 | * |
3018 | * Return: true if the TT Request was sent, false otherwise | |
ced72933 | 3019 | */ |
4b426b10 SE |
3020 | static bool batadv_send_tt_request(struct batadv_priv *bat_priv, |
3021 | struct batadv_orig_node *dst_orig_node, | |
3022 | u8 ttvn, | |
3023 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
3024 | u16 num_vlan, bool full_table) | |
a73105b8 | 3025 | { |
335fbe0f | 3026 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 3027 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
3028 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
3029 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 3030 | bool ret = false; |
7ea7b4a1 | 3031 | int i, size; |
a73105b8 | 3032 | |
e5d89254 | 3033 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
3034 | if (!primary_if) |
3035 | goto out; | |
3036 | ||
3037 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
3038 | * reply from the same orig_node yet |
3039 | */ | |
383b8636 | 3040 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
3041 | if (!tt_req_node) |
3042 | goto out; | |
3043 | ||
7ea7b4a1 AQ |
3044 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
3045 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 3046 | if (!tvlv_tt_data) |
a73105b8 AQ |
3047 | goto out; |
3048 | ||
335fbe0f ML |
3049 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
3050 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
3051 | tvlv_tt_data->num_vlan = htons(num_vlan); |
3052 | ||
3053 | /* send all the CRCs within the request. This is needed by intermediate | |
3054 | * nodes to ensure they have the correct table before replying | |
3055 | */ | |
3056 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
3057 | for (i = 0; i < num_vlan; i++) { | |
3058 | tt_vlan_req->vid = tt_vlan->vid; | |
3059 | tt_vlan_req->crc = tt_vlan->crc; | |
3060 | ||
3061 | tt_vlan_req++; | |
3062 | tt_vlan++; | |
3063 | } | |
a73105b8 AQ |
3064 | |
3065 | if (full_table) | |
335fbe0f | 3066 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3067 | |
bb351ba0 | 3068 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 3069 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 3070 | |
d69909d2 | 3071 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
3072 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
3073 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 3074 | tvlv_tt_data, size); |
335fbe0f | 3075 | ret = true; |
a73105b8 AQ |
3076 | |
3077 | out: | |
a73105b8 | 3078 | if (primary_if) |
82047ad7 | 3079 | batadv_hardif_put(primary_if); |
9c4604a2 | 3080 | |
a73105b8 | 3081 | if (ret && tt_req_node) { |
807736f6 | 3082 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
9c4604a2 SE |
3083 | if (!hlist_unhashed(&tt_req_node->list)) { |
3084 | hlist_del_init(&tt_req_node->list); | |
3085 | batadv_tt_req_node_put(tt_req_node); | |
3086 | } | |
807736f6 | 3087 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 3088 | } |
9c4604a2 SE |
3089 | |
3090 | if (tt_req_node) | |
3091 | batadv_tt_req_node_put(tt_req_node); | |
3092 | ||
335fbe0f | 3093 | kfree(tvlv_tt_data); |
a73105b8 AQ |
3094 | return ret; |
3095 | } | |
3096 | ||
335fbe0f ML |
3097 | /** |
3098 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
3099 | * node's translation table | |
3100 | * @bat_priv: the bat priv with all the soft interface information | |
3101 | * @tt_data: tt data containing the tt request information | |
3102 | * @req_src: mac address of tt request sender | |
3103 | * @req_dst: mac address of tt request recipient | |
3104 | * | |
62fe710f | 3105 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3106 | */ |
3107 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
3108 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3109 | u8 *req_src, u8 *req_dst) |
a73105b8 | 3110 | { |
170173bf | 3111 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 3112 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 3113 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 3114 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 3115 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 3116 | bool ret = false, full_table; |
6b5e971a SE |
3117 | u8 orig_ttvn, req_ttvn; |
3118 | u16 tvlv_len; | |
3119 | s32 tt_len; | |
a73105b8 | 3120 | |
39c75a51 | 3121 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3122 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 3123 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 3124 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
3125 | |
3126 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 3127 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
3128 | if (!req_dst_orig_node) |
3129 | goto out; | |
3130 | ||
335fbe0f | 3131 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
3132 | if (!res_dst_orig_node) |
3133 | goto out; | |
3134 | ||
6b5e971a | 3135 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 3136 | req_ttvn = tt_data->ttvn; |
a73105b8 | 3137 | |
7ea7b4a1 | 3138 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 3139 | /* this node doesn't have the requested data */ |
a73105b8 | 3140 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
3141 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
3142 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
3143 | goto out; |
3144 | ||
015758d0 | 3145 | /* If the full table has been explicitly requested */ |
335fbe0f | 3146 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
3147 | !req_dst_orig_node->tt_buff) |
3148 | full_table = true; | |
3149 | else | |
3150 | full_table = false; | |
3151 | ||
335fbe0f ML |
3152 | /* TT fragmentation hasn't been implemented yet, so send as many |
3153 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 3154 | */ |
a73105b8 AQ |
3155 | if (!full_table) { |
3156 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
3157 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 3158 | |
7ea7b4a1 AQ |
3159 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
3160 | &tvlv_tt_data, | |
3161 | &tt_change, | |
3162 | &tt_len); | |
3163 | if (!tt_len) | |
a73105b8 AQ |
3164 | goto unlock; |
3165 | ||
a73105b8 | 3166 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 3167 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 3168 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
3169 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
3170 | } else { | |
7ea7b4a1 AQ |
3171 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
3172 | * in the initial part | |
3173 | */ | |
3174 | tt_len = -1; | |
3175 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
3176 | &tvlv_tt_data, | |
3177 | &tt_change, | |
3178 | &tt_len); | |
3179 | if (!tt_len) | |
a73105b8 | 3180 | goto out; |
7ea7b4a1 AQ |
3181 | |
3182 | /* fill the rest of the tvlv with the real TT entries */ | |
3183 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
3184 | tt_change, tt_len, | |
3185 | batadv_tt_global_valid, | |
3186 | req_dst_orig_node); | |
a73105b8 AQ |
3187 | } |
3188 | ||
a19d3d85 ML |
3189 | /* Don't send the response, if larger than fragmented packet. */ |
3190 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
3191 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
3192 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
3193 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
3194 | res_dst_orig_node->orig); | |
3195 | goto out; | |
3196 | } | |
3197 | ||
335fbe0f ML |
3198 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
3199 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
3200 | |
3201 | if (full_table) | |
335fbe0f | 3202 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3203 | |
39c75a51 | 3204 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
3205 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
3206 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
3207 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 3208 | |
d69909d2 | 3209 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 3210 | |
335fbe0f | 3211 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
3212 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
3213 | tvlv_len); | |
e91ecfc6 | 3214 | |
335fbe0f | 3215 | ret = true; |
a73105b8 AQ |
3216 | goto out; |
3217 | ||
3218 | unlock: | |
3219 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
3220 | ||
3221 | out: | |
3222 | if (res_dst_orig_node) | |
5d967310 | 3223 | batadv_orig_node_put(res_dst_orig_node); |
a73105b8 | 3224 | if (req_dst_orig_node) |
5d967310 | 3225 | batadv_orig_node_put(req_dst_orig_node); |
335fbe0f | 3226 | kfree(tvlv_tt_data); |
a73105b8 | 3227 | return ret; |
a73105b8 | 3228 | } |
96412690 | 3229 | |
335fbe0f ML |
3230 | /** |
3231 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
3232 | * translation table | |
3233 | * @bat_priv: the bat priv with all the soft interface information | |
3234 | * @tt_data: tt data containing the tt request information | |
3235 | * @req_src: mac address of tt request sender | |
3236 | * | |
62fe710f | 3237 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3238 | */ |
3239 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
3240 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3241 | u8 *req_src) |
a73105b8 | 3242 | { |
335fbe0f | 3243 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 3244 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
3245 | struct batadv_tvlv_tt_change *tt_change; |
3246 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
3247 | u8 my_ttvn, req_ttvn; |
3248 | u16 tvlv_len; | |
a73105b8 | 3249 | bool full_table; |
6b5e971a | 3250 | s32 tt_len; |
a73105b8 | 3251 | |
39c75a51 | 3252 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3253 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 3254 | req_src, tt_data->ttvn, |
a2f2b6cd | 3255 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3256 | |
a70a9aa9 | 3257 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 3258 | |
6b5e971a | 3259 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 3260 | req_ttvn = tt_data->ttvn; |
a73105b8 | 3261 | |
335fbe0f | 3262 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
3263 | if (!orig_node) |
3264 | goto out; | |
3265 | ||
e5d89254 | 3266 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
3267 | if (!primary_if) |
3268 | goto out; | |
3269 | ||
3270 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
3271 | * is too big send the whole local translation table |
3272 | */ | |
335fbe0f | 3273 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 3274 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
3275 | full_table = true; |
3276 | else | |
3277 | full_table = false; | |
3278 | ||
335fbe0f ML |
3279 | /* TT fragmentation hasn't been implemented yet, so send as many |
3280 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 3281 | */ |
a73105b8 | 3282 | if (!full_table) { |
807736f6 | 3283 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 3284 | |
7ea7b4a1 AQ |
3285 | tt_len = bat_priv->tt.last_changeset_len; |
3286 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
3287 | &tvlv_tt_data, | |
3288 | &tt_change, | |
3289 | &tt_len); | |
c2d0f48a | 3290 | if (!tt_len || !tvlv_len) |
a73105b8 AQ |
3291 | goto unlock; |
3292 | ||
335fbe0f | 3293 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 3294 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
3295 | bat_priv->tt.last_changeset_len); |
3296 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 3297 | } else { |
6b5e971a | 3298 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 3299 | |
7ea7b4a1 AQ |
3300 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
3301 | * in the initial part | |
3302 | */ | |
3303 | tt_len = -1; | |
3304 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
3305 | &tvlv_tt_data, | |
3306 | &tt_change, | |
3307 | &tt_len); | |
c2d0f48a | 3308 | if (!tt_len || !tvlv_len) |
a73105b8 | 3309 | goto out; |
7ea7b4a1 AQ |
3310 | |
3311 | /* fill the rest of the tvlv with the real TT entries */ | |
3312 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
3313 | tt_change, tt_len, | |
3314 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
3315 | } |
3316 | ||
335fbe0f ML |
3317 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
3318 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
3319 | |
3320 | if (full_table) | |
335fbe0f | 3321 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3322 | |
39c75a51 | 3323 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
3324 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
3325 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 3326 | |
d69909d2 | 3327 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 3328 | |
335fbe0f | 3329 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
3330 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
3331 | tvlv_len); | |
335fbe0f | 3332 | |
a73105b8 AQ |
3333 | goto out; |
3334 | ||
3335 | unlock: | |
807736f6 | 3336 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 3337 | out: |
a70a9aa9 | 3338 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 3339 | if (orig_node) |
5d967310 | 3340 | batadv_orig_node_put(orig_node); |
a73105b8 | 3341 | if (primary_if) |
82047ad7 | 3342 | batadv_hardif_put(primary_if); |
335fbe0f ML |
3343 | kfree(tvlv_tt_data); |
3344 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
3345 | return true; |
3346 | } | |
3347 | ||
335fbe0f ML |
3348 | /** |
3349 | * batadv_send_tt_response - send reply to tt request | |
3350 | * @bat_priv: the bat priv with all the soft interface information | |
3351 | * @tt_data: tt data containing the tt request information | |
3352 | * @req_src: mac address of tt request sender | |
3353 | * @req_dst: mac address of tt request recipient | |
3354 | * | |
62fe710f | 3355 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3356 | */ |
3357 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
3358 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3359 | u8 *req_src, u8 *req_dst) |
a73105b8 | 3360 | { |
cfd4f757 | 3361 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 3362 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
3363 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
3364 | req_dst); | |
a73105b8 AQ |
3365 | } |
3366 | ||
56303d34 SE |
3367 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
3368 | struct batadv_orig_node *orig_node, | |
335fbe0f | 3369 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3370 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
3371 | { |
3372 | int i; | |
a513088d | 3373 | int roams; |
a73105b8 AQ |
3374 | |
3375 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
3376 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
3377 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
3378 | batadv_tt_global_del(bat_priv, orig_node, |
3379 | (tt_change + i)->addr, | |
c018ad3d | 3380 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
3381 | "tt removed by changes", |
3382 | roams); | |
08c36d3e | 3383 | } else { |
08c36d3e | 3384 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 3385 | (tt_change + i)->addr, |
c018ad3d | 3386 | ntohs((tt_change + i)->vid), |
d4f44692 | 3387 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
3388 | /* In case of problem while storing a |
3389 | * global_entry, we stop the updating | |
3390 | * procedure without committing the | |
3391 | * ttvn change. This will avoid to send | |
3392 | * corrupted data on tt_request | |
3393 | */ | |
3394 | return; | |
08c36d3e | 3395 | } |
a73105b8 | 3396 | } |
ac4eebd4 | 3397 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
3398 | } |
3399 | ||
56303d34 | 3400 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 3401 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
3402 | u8 ttvn, u8 *resp_src, |
3403 | u16 num_entries) | |
a73105b8 | 3404 | { |
170173bf | 3405 | struct batadv_orig_node *orig_node; |
a73105b8 | 3406 | |
335fbe0f | 3407 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3408 | if (!orig_node) |
3409 | goto out; | |
3410 | ||
3411 | /* Purge the old table first.. */ | |
95fb130d AQ |
3412 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
3413 | "Received full table"); | |
a73105b8 | 3414 | |
7ea7b4a1 AQ |
3415 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
3416 | ttvn); | |
a73105b8 AQ |
3417 | |
3418 | spin_lock_bh(&orig_node->tt_buff_lock); | |
3419 | kfree(orig_node->tt_buff); | |
3420 | orig_node->tt_buff_len = 0; | |
3421 | orig_node->tt_buff = NULL; | |
3422 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
3423 | ||
7ea7b4a1 | 3424 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
3425 | |
3426 | out: | |
3427 | if (orig_node) | |
5d967310 | 3428 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3429 | } |
3430 | ||
56303d34 SE |
3431 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
3432 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3433 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 3434 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 3435 | { |
a513088d SE |
3436 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
3437 | tt_num_changes, ttvn); | |
a73105b8 | 3438 | |
e8cf234a AQ |
3439 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
3440 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
3441 | atomic_set(&orig_node->last_ttvn, ttvn); |
3442 | } | |
3443 | ||
c018ad3d AQ |
3444 | /** |
3445 | * batadv_is_my_client - check if a client is served by the local node | |
3446 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 3447 | * @addr: the mac address of the client to check |
c018ad3d AQ |
3448 | * @vid: VLAN identifier |
3449 | * | |
62fe710f | 3450 | * Return: true if the client is served by this node, false otherwise. |
c018ad3d | 3451 | */ |
6b5e971a | 3452 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 3453 | unsigned short vid) |
a73105b8 | 3454 | { |
170173bf | 3455 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 3456 | bool ret = false; |
a73105b8 | 3457 | |
c018ad3d | 3458 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
3459 | if (!tt_local_entry) |
3460 | goto out; | |
058d0e26 | 3461 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
3462 | * consistency purpose) |
3463 | */ | |
7c1fd91d AQ |
3464 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
3465 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 3466 | goto out; |
7683fdc1 AQ |
3467 | ret = true; |
3468 | out: | |
a73105b8 | 3469 | if (tt_local_entry) |
95c0db90 | 3470 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 3471 | return ret; |
a73105b8 AQ |
3472 | } |
3473 | ||
335fbe0f ML |
3474 | /** |
3475 | * batadv_handle_tt_response - process incoming tt reply | |
3476 | * @bat_priv: the bat priv with all the soft interface information | |
3477 | * @tt_data: tt data containing the tt request information | |
3478 | * @resp_src: mac address of tt reply sender | |
3479 | * @num_entries: number of tt change entries appended to the tt data | |
3480 | */ | |
3481 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
3482 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3483 | u8 *resp_src, u16 num_entries) |
a73105b8 | 3484 | { |
7c26a53b ML |
3485 | struct batadv_tt_req_node *node; |
3486 | struct hlist_node *safe; | |
56303d34 | 3487 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 3488 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
3489 | u8 *tvlv_ptr = (u8 *)tt_data; |
3490 | u16 change_offset; | |
a73105b8 | 3491 | |
39c75a51 | 3492 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3493 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 3494 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 3495 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3496 | |
335fbe0f | 3497 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3498 | if (!orig_node) |
3499 | goto out; | |
3500 | ||
a70a9aa9 AQ |
3501 | spin_lock_bh(&orig_node->tt_lock); |
3502 | ||
7ea7b4a1 AQ |
3503 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
3504 | change_offset *= ntohs(tt_data->num_vlan); | |
3505 | change_offset += sizeof(*tt_data); | |
3506 | tvlv_ptr += change_offset; | |
3507 | ||
3508 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 3509 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
3510 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3511 | resp_src, num_entries); | |
96412690 | 3512 | } else { |
335fbe0f ML |
3513 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3514 | tt_data->ttvn, tt_change); | |
96412690 | 3515 | } |
a73105b8 | 3516 | |
a70a9aa9 | 3517 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3518 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3519 | |
3520 | spin_unlock_bh(&orig_node->tt_lock); | |
3521 | ||
a73105b8 | 3522 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3523 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3524 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3525 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3526 | continue; |
7c26a53b | 3527 | hlist_del_init(&node->list); |
9c4604a2 | 3528 | batadv_tt_req_node_put(node); |
a73105b8 | 3529 | } |
7ea7b4a1 | 3530 | |
807736f6 | 3531 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3532 | out: |
3533 | if (orig_node) | |
5d967310 | 3534 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3535 | } |
3536 | ||
56303d34 | 3537 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3538 | { |
56303d34 | 3539 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3540 | |
807736f6 | 3541 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3542 | |
807736f6 | 3543 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e | 3544 | list_del(&node->list); |
86452f81 | 3545 | kmem_cache_free(batadv_tt_roam_cache, node); |
cc47f66e AQ |
3546 | } |
3547 | ||
807736f6 | 3548 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3549 | } |
3550 | ||
56303d34 | 3551 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3552 | { |
56303d34 | 3553 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3554 | |
807736f6 SE |
3555 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3556 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3557 | if (!batadv_has_timed_out(node->first_time, |
3558 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3559 | continue; |
3560 | ||
3561 | list_del(&node->list); | |
86452f81 | 3562 | kmem_cache_free(batadv_tt_roam_cache, node); |
cc47f66e | 3563 | } |
807736f6 | 3564 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3565 | } |
3566 | ||
62fe710f | 3567 | /** |
d15cd622 AQ |
3568 | * batadv_tt_check_roam_count - check if a client has roamed too frequently |
3569 | * @bat_priv: the bat priv with all the soft interface information | |
3570 | * @client: mac address of the roaming client | |
62fe710f SE |
3571 | * |
3572 | * This function checks whether the client already reached the | |
cc47f66e AQ |
3573 | * maximum number of possible roaming phases. In this case the ROAMING_ADV |
3574 | * will not be sent. | |
3575 | * | |
62fe710f | 3576 | * Return: true if the ROAMING_ADV can be sent, false otherwise |
9cfc7bd6 | 3577 | */ |
6b5e971a | 3578 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3579 | { |
56303d34 | 3580 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3581 | bool ret = false; |
3582 | ||
807736f6 | 3583 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3584 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3585 | * reply from the same orig_node yet |
3586 | */ | |
807736f6 | 3587 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3588 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3589 | continue; |
3590 | ||
1eda58bf | 3591 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3592 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3593 | continue; |
3594 | ||
3e34819e | 3595 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3596 | /* Sorry, you roamed too many times! */ |
3597 | goto unlock; | |
3598 | ret = true; | |
3599 | break; | |
3600 | } | |
3601 | ||
3602 | if (!ret) { | |
86452f81 SE |
3603 | tt_roam_node = kmem_cache_alloc(batadv_tt_roam_cache, |
3604 | GFP_ATOMIC); | |
cc47f66e AQ |
3605 | if (!tt_roam_node) |
3606 | goto unlock; | |
3607 | ||
3608 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3609 | atomic_set(&tt_roam_node->counter, |
3610 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3611 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3612 | |
807736f6 | 3613 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3614 | ret = true; |
3615 | } | |
3616 | ||
3617 | unlock: | |
807736f6 | 3618 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3619 | return ret; |
3620 | } | |
3621 | ||
c018ad3d AQ |
3622 | /** |
3623 | * batadv_send_roam_adv - send a roaming advertisement message | |
3624 | * @bat_priv: the bat priv with all the soft interface information | |
3625 | * @client: mac address of the roaming client | |
3626 | * @vid: VLAN identifier | |
3627 | * @orig_node: message destination | |
3628 | * | |
3629 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3630 | * client. This is done to inform the node that from now on all traffic destined | |
3631 | * for this particular roamed client has to be forwarded to the sender of the | |
3632 | * roaming message. | |
3633 | */ | |
6b5e971a | 3634 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3635 | unsigned short vid, |
56303d34 | 3636 | struct batadv_orig_node *orig_node) |
cc47f66e | 3637 | { |
56303d34 | 3638 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3639 | struct batadv_tvlv_roam_adv tvlv_roam; |
3640 | ||
3641 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3642 | if (!primary_if) | |
3643 | goto out; | |
cc47f66e AQ |
3644 | |
3645 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3646 | * already roamed to us too many times |
3647 | */ | |
a513088d | 3648 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3649 | goto out; |
3650 | ||
39c75a51 | 3651 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3652 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3653 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3654 | |
d69909d2 | 3655 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3656 | |
122edaa0 | 3657 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3658 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3659 | |
3660 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3661 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3662 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3663 | |
3664 | out: | |
122edaa0 | 3665 | if (primary_if) |
82047ad7 | 3666 | batadv_hardif_put(primary_if); |
a73105b8 AQ |
3667 | } |
3668 | ||
a513088d | 3669 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3670 | { |
56303d34 | 3671 | struct delayed_work *delayed_work; |
807736f6 | 3672 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3673 | struct batadv_priv *bat_priv; |
3674 | ||
4ba4bc0f | 3675 | delayed_work = to_delayed_work(work); |
807736f6 SE |
3676 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3677 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3678 | |
a19d3d85 | 3679 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3680 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3681 | batadv_tt_req_purge(bat_priv); |
3682 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3683 | |
72414442 AQ |
3684 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3685 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3686 | } |
cc47f66e | 3687 | |
56303d34 | 3688 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3689 | { |
e1bf0c14 ML |
3690 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3691 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3692 | ||
807736f6 | 3693 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3694 | |
a513088d SE |
3695 | batadv_tt_local_table_free(bat_priv); |
3696 | batadv_tt_global_table_free(bat_priv); | |
3697 | batadv_tt_req_list_free(bat_priv); | |
3698 | batadv_tt_changes_list_free(bat_priv); | |
3699 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3700 | |
807736f6 | 3701 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3702 | } |
058d0e26 | 3703 | |
7ea7b4a1 AQ |
3704 | /** |
3705 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3706 | * table and possibly count them in the TT size | |
3707 | * @bat_priv: the bat priv with all the soft interface information | |
3708 | * @flags: the flag to switch | |
3709 | * @enable: whether to set or unset the flag | |
3710 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3711 | */ |
6b5e971a SE |
3712 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3713 | bool enable, bool count) | |
058d0e26 | 3714 | { |
7ea7b4a1 AQ |
3715 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3716 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 3717 | u16 changed_num = 0; |
058d0e26 | 3718 | struct hlist_head *head; |
6b5e971a | 3719 | u32 i; |
058d0e26 AQ |
3720 | |
3721 | if (!hash) | |
7ea7b4a1 | 3722 | return; |
058d0e26 AQ |
3723 | |
3724 | for (i = 0; i < hash->size; i++) { | |
3725 | head = &hash->table[i]; | |
3726 | ||
3727 | rcu_read_lock(); | |
b67bfe0d | 3728 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3729 | head, hash_entry) { |
697f2531 AQ |
3730 | if (enable) { |
3731 | if ((tt_common_entry->flags & flags) == flags) | |
3732 | continue; | |
3733 | tt_common_entry->flags |= flags; | |
3734 | } else { | |
3735 | if (!(tt_common_entry->flags & flags)) | |
3736 | continue; | |
3737 | tt_common_entry->flags &= ~flags; | |
3738 | } | |
3739 | changed_num++; | |
7ea7b4a1 AQ |
3740 | |
3741 | if (!count) | |
3742 | continue; | |
3743 | ||
3744 | batadv_tt_local_size_inc(bat_priv, | |
3745 | tt_common_entry->vid); | |
058d0e26 AQ |
3746 | } |
3747 | rcu_read_unlock(); | |
3748 | } | |
058d0e26 AQ |
3749 | } |
3750 | ||
acd34afa | 3751 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3752 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3753 | { |
807736f6 | 3754 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3755 | struct batadv_tt_common_entry *tt_common; |
3756 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3757 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3758 | struct hlist_head *head; |
3759 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3760 | u32 i; |
058d0e26 AQ |
3761 | |
3762 | if (!hash) | |
3763 | return; | |
3764 | ||
3765 | for (i = 0; i < hash->size; i++) { | |
3766 | head = &hash->table[i]; | |
3767 | list_lock = &hash->list_locks[i]; | |
3768 | ||
3769 | spin_lock_bh(list_lock); | |
b67bfe0d | 3770 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3771 | hash_entry) { |
3772 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3773 | continue; |
3774 | ||
39c75a51 | 3775 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3776 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3777 | tt_common->addr, | |
3778 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3779 | |
7ea7b4a1 | 3780 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3781 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3782 | tt_local = container_of(tt_common, |
3783 | struct batadv_tt_local_entry, | |
3784 | common); | |
35df3b29 | 3785 | |
95c0db90 | 3786 | batadv_tt_local_entry_put(tt_local); |
058d0e26 AQ |
3787 | } |
3788 | spin_unlock_bh(list_lock); | |
3789 | } | |
058d0e26 AQ |
3790 | } |
3791 | ||
e1bf0c14 | 3792 | /** |
a19d3d85 ML |
3793 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3794 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3795 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3796 | * |
3797 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3798 | */ |
a19d3d85 | 3799 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3800 | { |
5274cd68 SE |
3801 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3802 | ||
e1bf0c14 ML |
3803 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3804 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3805 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3806 | return; |
e1bf0c14 | 3807 | } |
be9aa4c1 | 3808 | |
7ea7b4a1 | 3809 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3810 | |
a513088d | 3811 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3812 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3813 | |
3814 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3815 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3816 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3817 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3818 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3819 | |
3820 | /* reset the sending counter */ | |
807736f6 | 3821 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3822 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3823 | } |
a70a9aa9 | 3824 | |
a19d3d85 ML |
3825 | /** |
3826 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3827 | * have been queued in the time since the last commit | |
3828 | * @bat_priv: the bat priv with all the soft interface information | |
3829 | */ | |
3830 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3831 | { | |
3832 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3833 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3834 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3835 | } |
59b699cd | 3836 | |
6b5e971a SE |
3837 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3838 | unsigned short vid) | |
59b699cd | 3839 | { |
393b299d ME |
3840 | struct batadv_tt_local_entry *tt_local_entry; |
3841 | struct batadv_tt_global_entry *tt_global_entry; | |
b8cbd81d | 3842 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3843 | bool ret = false; |
59b699cd | 3844 | |
b8cbd81d | 3845 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3846 | if (!vlan) |
3847 | return false; | |
3848 | ||
3849 | if (!atomic_read(&vlan->ap_isolation)) | |
393b299d | 3850 | goto vlan_put; |
59b699cd | 3851 | |
b8cbd81d | 3852 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd | 3853 | if (!tt_local_entry) |
393b299d | 3854 | goto vlan_put; |
59b699cd | 3855 | |
b8cbd81d | 3856 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd | 3857 | if (!tt_global_entry) |
393b299d | 3858 | goto local_entry_put; |
59b699cd | 3859 | |
393b299d ME |
3860 | if (_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
3861 | ret = true; | |
59b699cd | 3862 | |
393b299d ME |
3863 | batadv_tt_global_entry_put(tt_global_entry); |
3864 | local_entry_put: | |
3865 | batadv_tt_local_entry_put(tt_local_entry); | |
3866 | vlan_put: | |
9c3bf081 | 3867 | batadv_softif_vlan_put(vlan); |
59b699cd AQ |
3868 | return ret; |
3869 | } | |
a943cac1 | 3870 | |
e1bf0c14 ML |
3871 | /** |
3872 | * batadv_tt_update_orig - update global translation table with new tt | |
3873 | * information received via ogms | |
3874 | * @bat_priv: the bat priv with all the soft interface information | |
e51f0397 SE |
3875 | * @orig_node: the orig_node of the ogm |
3876 | * @tt_buff: pointer to the first tvlv VLAN entry | |
7ea7b4a1 AQ |
3877 | * @tt_num_vlan: number of tvlv VLAN entries |
3878 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3879 | * @tt_num_changes: number of tt changes inside the tt buffer |
3880 | * @ttvn: translation table version number of this changeset | |
e1bf0c14 ML |
3881 | */ |
3882 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3883 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3884 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3885 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3886 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3887 | { |
6b5e971a | 3888 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3889 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3890 | bool full_table = true; |
e17931d1 | 3891 | bool has_tt_init; |
a943cac1 | 3892 | |
7ea7b4a1 | 3893 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3894 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3895 | &orig_node->capa_initialized); | |
e17931d1 | 3896 | |
17071578 | 3897 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3898 | * increased by one -> we can apply the attached changes |
3899 | */ | |
e17931d1 | 3900 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3901 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3902 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3903 | * times. | |
9cfc7bd6 SE |
3904 | * In this case send a tt request |
3905 | */ | |
a943cac1 ML |
3906 | if (!tt_num_changes) { |
3907 | full_table = false; | |
3908 | goto request_table; | |
3909 | } | |
3910 | ||
a70a9aa9 AQ |
3911 | spin_lock_bh(&orig_node->tt_lock); |
3912 | ||
a513088d | 3913 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3914 | ttvn, tt_change); |
a943cac1 ML |
3915 | |
3916 | /* Even if we received the precomputed crc with the OGM, we | |
3917 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3918 | * in the global table |
3919 | */ | |
7ea7b4a1 | 3920 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3921 | |
a70a9aa9 AQ |
3922 | spin_unlock_bh(&orig_node->tt_lock); |
3923 | ||
a943cac1 ML |
3924 | /* The ttvn alone is not enough to guarantee consistency |
3925 | * because a single value could represent different states | |
3926 | * (due to the wrap around). Thus a node has to check whether | |
3927 | * the resulting table (after applying the changes) is still | |
3928 | * consistent or not. E.g. a node could disconnect while its | |
3929 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3930 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3931 | * inconsistency |
3932 | */ | |
7ea7b4a1 AQ |
3933 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3934 | tt_num_vlan)) | |
a943cac1 | 3935 | goto request_table; |
a943cac1 ML |
3936 | } else { |
3937 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3938 | * in sync anymore -> request fresh tt data |
3939 | */ | |
e17931d1 | 3940 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3941 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3942 | tt_num_vlan)) { | |
a943cac1 | 3943 | request_table: |
39c75a51 | 3944 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3945 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3946 | orig_node->orig, ttvn, orig_ttvn, | |
3947 | tt_num_changes); | |
a513088d | 3948 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3949 | tt_vlan, tt_num_vlan, |
3950 | full_table); | |
a943cac1 ML |
3951 | return; |
3952 | } | |
3953 | } | |
3954 | } | |
3275e7cc | 3955 | |
c018ad3d AQ |
3956 | /** |
3957 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3958 | * @bat_priv: the bat priv with all the soft interface information | |
3959 | * @addr: the mac address of the client to check | |
3960 | * @vid: VLAN identifier | |
3961 | * | |
62fe710f | 3962 | * Return: true if we know that the client has moved from its old originator |
c018ad3d AQ |
3963 | * to another one. This entry is still kept for consistency purposes and will be |
3964 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3965 | */ |
56303d34 | 3966 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 3967 | u8 *addr, unsigned short vid) |
3275e7cc | 3968 | { |
56303d34 | 3969 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3970 | bool ret = false; |
3971 | ||
c018ad3d | 3972 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3973 | if (!tt_global_entry) |
3974 | goto out; | |
3975 | ||
c1d07431 | 3976 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
5dafd8a6 | 3977 | batadv_tt_global_entry_put(tt_global_entry); |
3275e7cc AQ |
3978 | out: |
3979 | return ret; | |
3980 | } | |
30cfd02b | 3981 | |
7c1fd91d AQ |
3982 | /** |
3983 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3984 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3985 | * @addr: the mac address of the local client to query |
3986 | * @vid: VLAN identifier | |
7c1fd91d | 3987 | * |
62fe710f | 3988 | * Return: true if the local client is known to be roaming (it is not served by |
7c1fd91d AQ |
3989 | * this node anymore) or not. If yes, the client is still present in the table |
3990 | * to keep the latter consistent with the node TTVN | |
3991 | */ | |
3992 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 3993 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
3994 | { |
3995 | struct batadv_tt_local_entry *tt_local_entry; | |
3996 | bool ret = false; | |
3997 | ||
c018ad3d | 3998 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3999 | if (!tt_local_entry) |
4000 | goto out; | |
4001 | ||
4002 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
95c0db90 | 4003 | batadv_tt_local_entry_put(tt_local_entry); |
7c1fd91d AQ |
4004 | out: |
4005 | return ret; | |
7c1fd91d AQ |
4006 | } |
4007 | ||
30cfd02b AQ |
4008 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
4009 | struct batadv_orig_node *orig_node, | |
c018ad3d | 4010 | const unsigned char *addr, |
16052789 | 4011 | unsigned short vid) |
30cfd02b AQ |
4012 | { |
4013 | bool ret = false; | |
4014 | ||
16052789 | 4015 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
4016 | BATADV_TT_CLIENT_TEMP, |
4017 | atomic_read(&orig_node->last_ttvn))) | |
4018 | goto out; | |
4019 | ||
4020 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
4021 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
4022 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
4023 | ret = true; |
4024 | out: | |
4025 | return ret; | |
4026 | } | |
e1bf0c14 | 4027 | |
a19d3d85 ML |
4028 | /** |
4029 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
4030 | * maximum packet size that can be transported through the mesh | |
4031 | * @soft_iface: netdev struct of the mesh interface | |
4032 | * | |
4033 | * Remove entries older than 'timeout' and half timeout if more entries need | |
4034 | * to be removed. | |
4035 | */ | |
4036 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
4037 | { | |
4038 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
4039 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
4040 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
4041 | bool reduced = false; | |
4042 | ||
4043 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
4044 | ||
4045 | while (true) { | |
4046 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
4047 | if (packet_size_max >= table_size) | |
4048 | break; | |
4049 | ||
4050 | batadv_tt_local_purge(bat_priv, timeout); | |
4051 | batadv_tt_local_purge_pending_clients(bat_priv); | |
4052 | ||
4053 | timeout /= 2; | |
4054 | reduced = true; | |
4055 | net_ratelimited_function(batadv_info, soft_iface, | |
4056 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
4057 | packet_size_max); | |
4058 | } | |
4059 | ||
4060 | /* commit these changes immediately, to avoid synchronization problem | |
4061 | * with the TTVN | |
4062 | */ | |
4063 | if (reduced) | |
4064 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
4065 | ||
4066 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
4067 | } | |
4068 | ||
e1bf0c14 ML |
4069 | /** |
4070 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
4071 | * @bat_priv: the bat priv with all the soft interface information | |
4072 | * @orig: the orig_node of the ogm | |
4073 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
4074 | * @tvlv_value: tvlv buffer containing the gateway data | |
4075 | * @tvlv_value_len: tvlv buffer length | |
4076 | */ | |
4077 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
4078 | struct batadv_orig_node *orig, | |
6b5e971a SE |
4079 | u8 flags, void *tvlv_value, |
4080 | u16 tvlv_value_len) | |
e1bf0c14 | 4081 | { |
7ea7b4a1 AQ |
4082 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
4083 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 4084 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 4085 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
4086 | |
4087 | if (tvlv_value_len < sizeof(*tt_data)) | |
4088 | return; | |
4089 | ||
4090 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
4091 | tvlv_value_len -= sizeof(*tt_data); | |
4092 | ||
7ea7b4a1 AQ |
4093 | num_vlan = ntohs(tt_data->num_vlan); |
4094 | ||
4095 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
4096 | return; | |
4097 | ||
4098 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
4099 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
4100 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
4101 | ||
298e6e68 | 4102 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 4103 | |
7ea7b4a1 AQ |
4104 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
4105 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
4106 | } |
4107 | ||
335fbe0f ML |
4108 | /** |
4109 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
4110 | * container | |
4111 | * @bat_priv: the bat priv with all the soft interface information | |
4112 | * @src: mac address of tt tvlv sender | |
4113 | * @dst: mac address of tt tvlv recipient | |
4114 | * @tvlv_value: tvlv buffer containing the tt data | |
4115 | * @tvlv_value_len: tvlv buffer length | |
4116 | * | |
62fe710f | 4117 | * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS |
335fbe0f ML |
4118 | * otherwise. |
4119 | */ | |
4120 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 4121 | u8 *src, u8 *dst, |
335fbe0f | 4122 | void *tvlv_value, |
6b5e971a | 4123 | u16 tvlv_value_len) |
335fbe0f ML |
4124 | { |
4125 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 4126 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
4127 | char tt_flag; |
4128 | bool ret; | |
4129 | ||
4130 | if (tvlv_value_len < sizeof(*tt_data)) | |
4131 | return NET_RX_SUCCESS; | |
4132 | ||
4133 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
4134 | tvlv_value_len -= sizeof(*tt_data); | |
4135 | ||
7ea7b4a1 AQ |
4136 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
4137 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
4138 | ||
4139 | if (tvlv_value_len < tt_vlan_len) | |
4140 | return NET_RX_SUCCESS; | |
4141 | ||
4142 | tvlv_value_len -= tt_vlan_len; | |
4143 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
4144 | |
4145 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
4146 | case BATADV_TT_REQUEST: | |
4147 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
4148 | ||
4149 | /* If this node cannot provide a TT response the tt_request is | |
4150 | * forwarded | |
4151 | */ | |
4152 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
4153 | if (!ret) { | |
4154 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
4155 | tt_flag = 'F'; | |
4156 | else | |
4157 | tt_flag = '.'; | |
4158 | ||
4159 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4160 | "Routing TT_REQUEST to %pM [%c]\n", | |
4161 | dst, tt_flag); | |
4162 | /* tvlv API will re-route the packet */ | |
4163 | return NET_RX_DROP; | |
4164 | } | |
4165 | break; | |
4166 | case BATADV_TT_RESPONSE: | |
4167 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
4168 | ||
4169 | if (batadv_is_my_mac(bat_priv, dst)) { | |
4170 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 4171 | src, tt_num_entries); |
335fbe0f ML |
4172 | return NET_RX_SUCCESS; |
4173 | } | |
4174 | ||
4175 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
4176 | tt_flag = 'F'; | |
4177 | else | |
4178 | tt_flag = '.'; | |
4179 | ||
4180 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4181 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
4182 | ||
4183 | /* tvlv API will re-route the packet */ | |
4184 | return NET_RX_DROP; | |
4185 | } | |
4186 | ||
4187 | return NET_RX_SUCCESS; | |
4188 | } | |
4189 | ||
122edaa0 ML |
4190 | /** |
4191 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
4192 | * @bat_priv: the bat priv with all the soft interface information | |
4193 | * @src: mac address of tt tvlv sender | |
4194 | * @dst: mac address of tt tvlv recipient | |
4195 | * @tvlv_value: tvlv buffer containing the tt data | |
4196 | * @tvlv_value_len: tvlv buffer length | |
4197 | * | |
62fe710f | 4198 | * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS |
122edaa0 ML |
4199 | * otherwise. |
4200 | */ | |
4201 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 4202 | u8 *src, u8 *dst, |
122edaa0 | 4203 | void *tvlv_value, |
6b5e971a | 4204 | u16 tvlv_value_len) |
122edaa0 ML |
4205 | { |
4206 | struct batadv_tvlv_roam_adv *roaming_adv; | |
4207 | struct batadv_orig_node *orig_node = NULL; | |
4208 | ||
4209 | /* If this node is not the intended recipient of the | |
4210 | * roaming advertisement the packet is forwarded | |
4211 | * (the tvlv API will re-route the packet). | |
4212 | */ | |
4213 | if (!batadv_is_my_mac(bat_priv, dst)) | |
4214 | return NET_RX_DROP; | |
4215 | ||
122edaa0 ML |
4216 | if (tvlv_value_len < sizeof(*roaming_adv)) |
4217 | goto out; | |
4218 | ||
4219 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
4220 | if (!orig_node) | |
4221 | goto out; | |
4222 | ||
4223 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
4224 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
4225 | ||
4226 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4227 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
4228 | src, roaming_adv->client); | |
4229 | ||
4230 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 4231 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
4232 | atomic_read(&orig_node->last_ttvn) + 1); |
4233 | ||
4234 | out: | |
4235 | if (orig_node) | |
5d967310 | 4236 | batadv_orig_node_put(orig_node); |
122edaa0 ML |
4237 | return NET_RX_SUCCESS; |
4238 | } | |
4239 | ||
e1bf0c14 ML |
4240 | /** |
4241 | * batadv_tt_init - initialise the translation table internals | |
4242 | * @bat_priv: the bat priv with all the soft interface information | |
4243 | * | |
62fe710f | 4244 | * Return: 0 on success or negative error number in case of failure. |
e1bf0c14 ML |
4245 | */ |
4246 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
4247 | { | |
4248 | int ret; | |
4249 | ||
0eb01568 AQ |
4250 | /* synchronized flags must be remote */ |
4251 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
4252 | ||
e1bf0c14 ML |
4253 | ret = batadv_tt_local_init(bat_priv); |
4254 | if (ret < 0) | |
4255 | return ret; | |
4256 | ||
4257 | ret = batadv_tt_global_init(bat_priv); | |
4258 | if (ret < 0) | |
4259 | return ret; | |
4260 | ||
4261 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
4262 | batadv_tt_tvlv_unicast_handler_v1, |
4263 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 4264 | |
122edaa0 ML |
4265 | batadv_tvlv_handler_register(bat_priv, NULL, |
4266 | batadv_roam_tvlv_unicast_handler_v1, | |
4267 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
4268 | ||
e1bf0c14 ML |
4269 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
4270 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
4271 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
4272 | ||
4273 | return 1; | |
4274 | } | |
42cb0bef AQ |
4275 | |
4276 | /** | |
4277 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
4278 | * @bat_priv: the bat priv with all the soft interface information | |
4279 | * @addr: the mac address of the client | |
4280 | * @vid: the identifier of the VLAN where this client is connected | |
4281 | * | |
62fe710f | 4282 | * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false |
42cb0bef AQ |
4283 | * otherwise |
4284 | */ | |
4285 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 4286 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
4287 | { |
4288 | struct batadv_tt_global_entry *tt; | |
4289 | bool ret; | |
4290 | ||
4291 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
4292 | if (!tt) | |
4293 | return false; | |
4294 | ||
4295 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
4296 | ||
5dafd8a6 | 4297 | batadv_tt_global_entry_put(tt); |
42cb0bef AQ |
4298 | |
4299 | return ret; | |
4300 | } | |
86452f81 SE |
4301 | |
4302 | /** | |
4303 | * batadv_tt_cache_init - Initialize tt memory object cache | |
4304 | * | |
4305 | * Return: 0 on success or negative error number in case of failure. | |
4306 | */ | |
4307 | int __init batadv_tt_cache_init(void) | |
4308 | { | |
4309 | size_t tl_size = sizeof(struct batadv_tt_local_entry); | |
4310 | size_t tg_size = sizeof(struct batadv_tt_global_entry); | |
4311 | size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry); | |
4312 | size_t tt_change_size = sizeof(struct batadv_tt_change_node); | |
4313 | size_t tt_req_size = sizeof(struct batadv_tt_req_node); | |
4314 | size_t tt_roam_size = sizeof(struct batadv_tt_roam_node); | |
4315 | ||
4316 | batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0, | |
4317 | SLAB_HWCACHE_ALIGN, NULL); | |
4318 | if (!batadv_tl_cache) | |
4319 | return -ENOMEM; | |
4320 | ||
4321 | batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0, | |
4322 | SLAB_HWCACHE_ALIGN, NULL); | |
4323 | if (!batadv_tg_cache) | |
4324 | goto err_tt_tl_destroy; | |
4325 | ||
4326 | batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache", | |
4327 | tt_orig_size, 0, | |
4328 | SLAB_HWCACHE_ALIGN, NULL); | |
4329 | if (!batadv_tt_orig_cache) | |
4330 | goto err_tt_tg_destroy; | |
4331 | ||
4332 | batadv_tt_change_cache = kmem_cache_create("batadv_tt_change_cache", | |
4333 | tt_change_size, 0, | |
4334 | SLAB_HWCACHE_ALIGN, NULL); | |
4335 | if (!batadv_tt_change_cache) | |
4336 | goto err_tt_orig_destroy; | |
4337 | ||
4338 | batadv_tt_req_cache = kmem_cache_create("batadv_tt_req_cache", | |
4339 | tt_req_size, 0, | |
4340 | SLAB_HWCACHE_ALIGN, NULL); | |
4341 | if (!batadv_tt_req_cache) | |
4342 | goto err_tt_change_destroy; | |
4343 | ||
4344 | batadv_tt_roam_cache = kmem_cache_create("batadv_tt_roam_cache", | |
4345 | tt_roam_size, 0, | |
4346 | SLAB_HWCACHE_ALIGN, NULL); | |
4347 | if (!batadv_tt_roam_cache) | |
4348 | goto err_tt_req_destroy; | |
4349 | ||
4350 | return 0; | |
4351 | ||
4352 | err_tt_req_destroy: | |
4353 | kmem_cache_destroy(batadv_tt_req_cache); | |
4354 | batadv_tt_req_cache = NULL; | |
4355 | err_tt_change_destroy: | |
4356 | kmem_cache_destroy(batadv_tt_change_cache); | |
4357 | batadv_tt_change_cache = NULL; | |
4358 | err_tt_orig_destroy: | |
4359 | kmem_cache_destroy(batadv_tt_orig_cache); | |
4360 | batadv_tt_orig_cache = NULL; | |
4361 | err_tt_tg_destroy: | |
4362 | kmem_cache_destroy(batadv_tg_cache); | |
4363 | batadv_tg_cache = NULL; | |
4364 | err_tt_tl_destroy: | |
4365 | kmem_cache_destroy(batadv_tl_cache); | |
4366 | batadv_tl_cache = NULL; | |
4367 | ||
4368 | return -ENOMEM; | |
4369 | } | |
4370 | ||
4371 | /** | |
4372 | * batadv_tt_cache_destroy - Destroy tt memory object cache | |
4373 | */ | |
4374 | void batadv_tt_cache_destroy(void) | |
4375 | { | |
4376 | kmem_cache_destroy(batadv_tl_cache); | |
4377 | kmem_cache_destroy(batadv_tg_cache); | |
4378 | kmem_cache_destroy(batadv_tt_orig_cache); | |
4379 | kmem_cache_destroy(batadv_tt_change_cache); | |
4380 | kmem_cache_destroy(batadv_tt_req_cache); | |
4381 | kmem_cache_destroy(batadv_tt_roam_cache); | |
4382 | } |