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7db7d9f3 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ac79cbb9 | 2 | /* Copyright (C) 2007-2017 B.A.T.M.A.N. contributors: |
c6c8fea2 | 3 | * |
35c133a0 | 4 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
5 | * |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of version 2 of the GNU General Public | |
8 | * License as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
17 | */ |
18 | ||
c6c8fea2 | 19 | #include "translation-table.h" |
1e2c2a4f SE |
20 | #include "main.h" |
21 | ||
22 | #include <linux/atomic.h> | |
ac4eebd4 | 23 | #include <linux/bitops.h> |
ecc36f5e | 24 | #include <linux/build_bug.h> |
1e2c2a4f | 25 | #include <linux/byteorder/generic.h> |
86452f81 | 26 | #include <linux/cache.h> |
1e2c2a4f SE |
27 | #include <linux/compiler.h> |
28 | #include <linux/crc32c.h> | |
29 | #include <linux/errno.h> | |
30 | #include <linux/etherdevice.h> | |
b92b94ac | 31 | #include <linux/gfp.h> |
1e2c2a4f | 32 | #include <linux/if_ether.h> |
86452f81 | 33 | #include <linux/init.h> |
1e2c2a4f SE |
34 | #include <linux/jhash.h> |
35 | #include <linux/jiffies.h> | |
36 | #include <linux/kernel.h> | |
6e8ef69d | 37 | #include <linux/kref.h> |
1e2c2a4f SE |
38 | #include <linux/list.h> |
39 | #include <linux/lockdep.h> | |
3a64469e | 40 | #include <linux/net.h> |
1e2c2a4f | 41 | #include <linux/netdevice.h> |
d34f0550 | 42 | #include <linux/netlink.h> |
1e2c2a4f SE |
43 | #include <linux/rculist.h> |
44 | #include <linux/rcupdate.h> | |
45 | #include <linux/seq_file.h> | |
d34f0550 | 46 | #include <linux/skbuff.h> |
1e2c2a4f SE |
47 | #include <linux/slab.h> |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/stddef.h> | |
50 | #include <linux/string.h> | |
51 | #include <linux/workqueue.h> | |
d34f0550 MS |
52 | #include <net/genetlink.h> |
53 | #include <net/netlink.h> | |
54 | #include <net/sock.h> | |
55 | #include <uapi/linux/batman_adv.h> | |
1e2c2a4f SE |
56 | |
57 | #include "bridge_loop_avoidance.h" | |
32ae9b22 | 58 | #include "hard-interface.h" |
c6c8fea2 | 59 | #include "hash.h" |
ba412080 | 60 | #include "log.h" |
d34f0550 | 61 | #include "netlink.h" |
1e2c2a4f SE |
62 | #include "originator.h" |
63 | #include "packet.h" | |
64 | #include "soft-interface.h" | |
1f8dce49 | 65 | #include "tvlv.h" |
a73105b8 | 66 | |
86452f81 SE |
67 | static struct kmem_cache *batadv_tl_cache __read_mostly; |
68 | static struct kmem_cache *batadv_tg_cache __read_mostly; | |
69 | static struct kmem_cache *batadv_tt_orig_cache __read_mostly; | |
70 | static struct kmem_cache *batadv_tt_change_cache __read_mostly; | |
71 | static struct kmem_cache *batadv_tt_req_cache __read_mostly; | |
72 | static struct kmem_cache *batadv_tt_roam_cache __read_mostly; | |
73 | ||
dec05074 AQ |
74 | /* hash class keys */ |
75 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
76 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
77 | ||
6b5e971a | 78 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 79 | unsigned short vid, |
56303d34 | 80 | struct batadv_orig_node *orig_node); |
a513088d SE |
81 | static void batadv_tt_purge(struct work_struct *work); |
82 | static void | |
56303d34 | 83 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
84 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
85 | struct batadv_orig_node *orig_node, | |
86 | const unsigned char *addr, | |
c018ad3d AQ |
87 | unsigned short vid, const char *message, |
88 | bool roaming); | |
c6c8fea2 | 89 | |
62fe710f | 90 | /** |
d15cd622 AQ |
91 | * batadv_compare_tt - check if two TT entries are the same |
92 | * @node: the list element pointer of the first TT entry | |
93 | * @data2: pointer to the tt_common_entry of the second TT entry | |
62fe710f | 94 | * |
d15cd622 AQ |
95 | * Compare the MAC address and the VLAN ID of the two TT entries and check if |
96 | * they are the same TT client. | |
4b426b10 | 97 | * Return: true if the two TT clients are the same, false otherwise |
62fe710f | 98 | */ |
4b426b10 | 99 | static bool batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 100 | { |
56303d34 | 101 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 102 | hash_entry); |
4c718958 ML |
103 | const struct batadv_tt_common_entry *tt1 = data1; |
104 | const struct batadv_tt_common_entry *tt2 = data2; | |
7aadf889 | 105 | |
4c718958 | 106 | return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2); |
7aadf889 ML |
107 | } |
108 | ||
c018ad3d AQ |
109 | /** |
110 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
111 | * @data: pointer to the tt_common_entry object to map | |
112 | * @size: the size of the hash table | |
113 | * | |
62fe710f | 114 | * Return: the hash index where the object represented by 'data' should be |
c018ad3d AQ |
115 | * stored at. |
116 | */ | |
6b5e971a | 117 | static inline u32 batadv_choose_tt(const void *data, u32 size) |
c018ad3d AQ |
118 | { |
119 | struct batadv_tt_common_entry *tt; | |
6b5e971a | 120 | u32 hash = 0; |
c018ad3d AQ |
121 | |
122 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
123 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
124 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
125 | |
126 | return hash % size; | |
127 | } | |
128 | ||
129 | /** | |
130 | * batadv_tt_hash_find - look for a client in the given hash table | |
131 | * @hash: the hash table to search | |
132 | * @addr: the mac address of the client to look for | |
133 | * @vid: VLAN identifier | |
134 | * | |
62fe710f | 135 | * Return: a pointer to the tt_common struct belonging to the searched client if |
c018ad3d AQ |
136 | * found, NULL otherwise. |
137 | */ | |
56303d34 | 138 | static struct batadv_tt_common_entry * |
6b5e971a | 139 | batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr, |
c018ad3d | 140 | unsigned short vid) |
7aadf889 | 141 | { |
7aadf889 | 142 | struct hlist_head *head; |
c018ad3d | 143 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
6b5e971a | 144 | u32 index; |
7aadf889 ML |
145 | |
146 | if (!hash) | |
147 | return NULL; | |
148 | ||
8fdd0153 | 149 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
150 | to_search.vid = vid; |
151 | ||
152 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
153 | head = &hash->table[index]; |
154 | ||
155 | rcu_read_lock(); | |
c018ad3d AQ |
156 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
157 | if (!batadv_compare_eth(tt, addr)) | |
158 | continue; | |
159 | ||
160 | if (tt->vid != vid) | |
7aadf889 ML |
161 | continue; |
162 | ||
92dcdf09 | 163 | if (!kref_get_unless_zero(&tt->refcount)) |
7683fdc1 AQ |
164 | continue; |
165 | ||
c018ad3d | 166 | tt_tmp = tt; |
7aadf889 ML |
167 | break; |
168 | } | |
169 | rcu_read_unlock(); | |
170 | ||
c018ad3d | 171 | return tt_tmp; |
7aadf889 ML |
172 | } |
173 | ||
c018ad3d AQ |
174 | /** |
175 | * batadv_tt_local_hash_find - search the local table for a given client | |
176 | * @bat_priv: the bat priv with all the soft interface information | |
177 | * @addr: the mac address of the client to look for | |
178 | * @vid: VLAN identifier | |
179 | * | |
62fe710f | 180 | * Return: a pointer to the corresponding tt_local_entry struct if the client is |
c018ad3d AQ |
181 | * found, NULL otherwise. |
182 | */ | |
56303d34 | 183 | static struct batadv_tt_local_entry * |
6b5e971a | 184 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 185 | unsigned short vid) |
7aadf889 | 186 | { |
56303d34 SE |
187 | struct batadv_tt_common_entry *tt_common_entry; |
188 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 189 | |
c018ad3d AQ |
190 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
191 | vid); | |
48100bac AQ |
192 | if (tt_common_entry) |
193 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
194 | struct batadv_tt_local_entry, |
195 | common); | |
48100bac AQ |
196 | return tt_local_entry; |
197 | } | |
7aadf889 | 198 | |
c018ad3d AQ |
199 | /** |
200 | * batadv_tt_global_hash_find - search the global table for a given client | |
201 | * @bat_priv: the bat priv with all the soft interface information | |
202 | * @addr: the mac address of the client to look for | |
203 | * @vid: VLAN identifier | |
204 | * | |
62fe710f | 205 | * Return: a pointer to the corresponding tt_global_entry struct if the client |
c018ad3d AQ |
206 | * is found, NULL otherwise. |
207 | */ | |
56303d34 | 208 | static struct batadv_tt_global_entry * |
6b5e971a | 209 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 210 | unsigned short vid) |
48100bac | 211 | { |
56303d34 SE |
212 | struct batadv_tt_common_entry *tt_common_entry; |
213 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 214 | |
c018ad3d AQ |
215 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
216 | vid); | |
48100bac AQ |
217 | if (tt_common_entry) |
218 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
219 | struct batadv_tt_global_entry, |
220 | common); | |
48100bac | 221 | return tt_global_entry; |
7aadf889 ML |
222 | } |
223 | ||
86452f81 SE |
224 | /** |
225 | * batadv_tt_local_entry_free_rcu - free the tt_local_entry | |
226 | * @rcu: rcu pointer of the tt_local_entry | |
227 | */ | |
228 | static void batadv_tt_local_entry_free_rcu(struct rcu_head *rcu) | |
229 | { | |
230 | struct batadv_tt_local_entry *tt_local_entry; | |
231 | ||
232 | tt_local_entry = container_of(rcu, struct batadv_tt_local_entry, | |
233 | common.rcu); | |
234 | ||
235 | kmem_cache_free(batadv_tl_cache, tt_local_entry); | |
236 | } | |
237 | ||
92dcdf09 SE |
238 | /** |
239 | * batadv_tt_local_entry_release - release tt_local_entry from lists and queue | |
240 | * for free after rcu grace period | |
241 | * @ref: kref pointer of the nc_node | |
242 | */ | |
243 | static void batadv_tt_local_entry_release(struct kref *ref) | |
244 | { | |
245 | struct batadv_tt_local_entry *tt_local_entry; | |
246 | ||
247 | tt_local_entry = container_of(ref, struct batadv_tt_local_entry, | |
248 | common.refcount); | |
249 | ||
a33d970d SE |
250 | batadv_softif_vlan_put(tt_local_entry->vlan); |
251 | ||
86452f81 | 252 | call_rcu(&tt_local_entry->common.rcu, batadv_tt_local_entry_free_rcu); |
92dcdf09 SE |
253 | } |
254 | ||
255 | /** | |
95c0db90 | 256 | * batadv_tt_local_entry_put - decrement the tt_local_entry refcounter and |
92dcdf09 SE |
257 | * possibly release it |
258 | * @tt_local_entry: tt_local_entry to be free'd | |
259 | */ | |
a513088d | 260 | static void |
95c0db90 | 261 | batadv_tt_local_entry_put(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 262 | { |
92dcdf09 SE |
263 | kref_put(&tt_local_entry->common.refcount, |
264 | batadv_tt_local_entry_release); | |
7683fdc1 AQ |
265 | } |
266 | ||
86452f81 SE |
267 | /** |
268 | * batadv_tt_global_entry_free_rcu - free the tt_global_entry | |
269 | * @rcu: rcu pointer of the tt_global_entry | |
270 | */ | |
271 | static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu) | |
272 | { | |
273 | struct batadv_tt_global_entry *tt_global_entry; | |
274 | ||
275 | tt_global_entry = container_of(rcu, struct batadv_tt_global_entry, | |
276 | common.rcu); | |
277 | ||
278 | kmem_cache_free(batadv_tg_cache, tt_global_entry); | |
279 | } | |
280 | ||
21026059 | 281 | /** |
92dcdf09 SE |
282 | * batadv_tt_global_entry_release - release tt_global_entry from lists and queue |
283 | * for free after rcu grace period | |
284 | * @ref: kref pointer of the nc_node | |
285 | */ | |
286 | static void batadv_tt_global_entry_release(struct kref *ref) | |
287 | { | |
288 | struct batadv_tt_global_entry *tt_global_entry; | |
289 | ||
290 | tt_global_entry = container_of(ref, struct batadv_tt_global_entry, | |
291 | common.refcount); | |
292 | ||
293 | batadv_tt_global_del_orig_list(tt_global_entry); | |
86452f81 SE |
294 | |
295 | call_rcu(&tt_global_entry->common.rcu, batadv_tt_global_entry_free_rcu); | |
92dcdf09 SE |
296 | } |
297 | ||
298 | /** | |
5dafd8a6 SE |
299 | * batadv_tt_global_entry_put - decrement the tt_global_entry refcounter and |
300 | * possibly release it | |
92dcdf09 | 301 | * @tt_global_entry: tt_global_entry to be free'd |
21026059 | 302 | */ |
a513088d | 303 | static void |
5dafd8a6 | 304 | batadv_tt_global_entry_put(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 305 | { |
92dcdf09 SE |
306 | kref_put(&tt_global_entry->common.refcount, |
307 | batadv_tt_global_entry_release); | |
db08e6e5 SW |
308 | } |
309 | ||
1d8ab8d3 LL |
310 | /** |
311 | * batadv_tt_global_hash_count - count the number of orig entries | |
d15cd622 | 312 | * @bat_priv: the bat priv with all the soft interface information |
1d8ab8d3 LL |
313 | * @addr: the mac address of the client to count entries for |
314 | * @vid: VLAN identifier | |
315 | * | |
62fe710f | 316 | * Return: the number of originators advertising the given address/data |
1d8ab8d3 LL |
317 | * (excluding ourself). |
318 | */ | |
319 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 320 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
321 | { |
322 | struct batadv_tt_global_entry *tt_global_entry; | |
323 | int count; | |
324 | ||
325 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
326 | if (!tt_global_entry) | |
327 | return 0; | |
328 | ||
329 | count = atomic_read(&tt_global_entry->orig_list_count); | |
5dafd8a6 | 330 | batadv_tt_global_entry_put(tt_global_entry); |
1d8ab8d3 LL |
331 | |
332 | return count; | |
333 | } | |
334 | ||
7ea7b4a1 AQ |
335 | /** |
336 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
337 | * by vid | |
338 | * @bat_priv: the bat priv with all the soft interface information | |
339 | * @vid: the VLAN identifier of the sub-table to change | |
340 | * @v: the amount to sum to the local table size | |
341 | */ | |
342 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
343 | unsigned short vid, int v) | |
344 | { | |
345 | struct batadv_softif_vlan *vlan; | |
346 | ||
347 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
348 | if (!vlan) | |
349 | return; | |
350 | ||
351 | atomic_add(v, &vlan->tt.num_entries); | |
352 | ||
9c3bf081 | 353 | batadv_softif_vlan_put(vlan); |
7ea7b4a1 AQ |
354 | } |
355 | ||
356 | /** | |
357 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
358 | * vid | |
359 | * @bat_priv: the bat priv with all the soft interface information | |
360 | * @vid: the VLAN identifier | |
361 | */ | |
362 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
363 | unsigned short vid) | |
364 | { | |
365 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
366 | } | |
367 | ||
368 | /** | |
369 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
370 | * vid | |
371 | * @bat_priv: the bat priv with all the soft interface information | |
372 | * @vid: the VLAN identifier | |
373 | */ | |
374 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
375 | unsigned short vid) | |
376 | { | |
377 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
378 | } | |
379 | ||
380 | /** | |
d15cd622 AQ |
381 | * batadv_tt_global_size_mod - change the size by v of the global table |
382 | * for orig_node identified by vid | |
383 | * @orig_node: the originator for which the table has to be modified | |
7ea7b4a1 AQ |
384 | * @vid: the VLAN identifier |
385 | * @v: the amount to sum to the global table size | |
386 | */ | |
387 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
388 | unsigned short vid, int v) | |
389 | { | |
390 | struct batadv_orig_node_vlan *vlan; | |
391 | ||
392 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
393 | if (!vlan) | |
394 | return; | |
395 | ||
396 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
397 | spin_lock_bh(&orig_node->vlan_list_lock); | |
3db15209 SE |
398 | if (!hlist_unhashed(&vlan->list)) { |
399 | hlist_del_init_rcu(&vlan->list); | |
21754e25 | 400 | batadv_orig_node_vlan_put(vlan); |
3db15209 | 401 | } |
7ea7b4a1 | 402 | spin_unlock_bh(&orig_node->vlan_list_lock); |
7ea7b4a1 AQ |
403 | } |
404 | ||
21754e25 | 405 | batadv_orig_node_vlan_put(vlan); |
7ea7b4a1 AQ |
406 | } |
407 | ||
408 | /** | |
409 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
410 | * given vid | |
411 | * @orig_node: the originator which global table size has to be decreased | |
412 | * @vid: the vlan identifier | |
413 | */ | |
414 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
415 | unsigned short vid) | |
416 | { | |
417 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
418 | } | |
419 | ||
420 | /** | |
421 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
422 | * given vid | |
423 | * @orig_node: the originator which global table size has to be decreased | |
424 | * @vid: the vlan identifier | |
425 | */ | |
426 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
427 | unsigned short vid) | |
428 | { | |
429 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
430 | } | |
431 | ||
86452f81 SE |
432 | /** |
433 | * batadv_tt_orig_list_entry_free_rcu - free the orig_entry | |
434 | * @rcu: rcu pointer of the orig_entry | |
435 | */ | |
436 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) | |
437 | { | |
438 | struct batadv_tt_orig_list_entry *orig_entry; | |
439 | ||
440 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); | |
441 | ||
442 | kmem_cache_free(batadv_tt_orig_cache, orig_entry); | |
443 | } | |
444 | ||
42eff6a6 SE |
445 | /** |
446 | * batadv_tt_orig_list_entry_release - release tt orig entry from lists and | |
447 | * queue for free after rcu grace period | |
6e8ef69d | 448 | * @ref: kref pointer of the tt orig entry |
42eff6a6 | 449 | */ |
6e8ef69d | 450 | static void batadv_tt_orig_list_entry_release(struct kref *ref) |
42eff6a6 | 451 | { |
6e8ef69d SE |
452 | struct batadv_tt_orig_list_entry *orig_entry; |
453 | ||
454 | orig_entry = container_of(ref, struct batadv_tt_orig_list_entry, | |
455 | refcount); | |
456 | ||
5d967310 | 457 | batadv_orig_node_put(orig_entry->orig_node); |
86452f81 | 458 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
42eff6a6 SE |
459 | } |
460 | ||
6e8ef69d | 461 | /** |
7e2366c6 SE |
462 | * batadv_tt_orig_list_entry_put - decrement the tt orig entry refcounter and |
463 | * possibly release it | |
6e8ef69d SE |
464 | * @orig_entry: tt orig entry to be free'd |
465 | */ | |
a513088d | 466 | static void |
7e2366c6 | 467 | batadv_tt_orig_list_entry_put(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 468 | { |
6e8ef69d | 469 | kref_put(&orig_entry->refcount, batadv_tt_orig_list_entry_release); |
7683fdc1 AQ |
470 | } |
471 | ||
3abe4adb AQ |
472 | /** |
473 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
474 | * @bat_priv: the bat priv with all the soft interface information | |
475 | * @tt_local_entry: the TT entry involved in the event | |
476 | * @event_flags: flags to store in the event structure | |
477 | */ | |
56303d34 | 478 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 479 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 480 | u8 event_flags) |
a73105b8 | 481 | { |
56303d34 | 482 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 483 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 484 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
485 | bool event_removed = false; |
486 | bool del_op_requested, del_op_entry; | |
a73105b8 | 487 | |
86452f81 | 488 | tt_change_node = kmem_cache_alloc(batadv_tt_change_cache, GFP_ATOMIC); |
a73105b8 AQ |
489 | if (!tt_change_node) |
490 | return; | |
491 | ||
ff66c975 | 492 | tt_change_node->change.flags = flags; |
ca663046 AQ |
493 | memset(tt_change_node->change.reserved, 0, |
494 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 495 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 496 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 497 | |
acd34afa | 498 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
499 | |
500 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
501 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
502 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 503 | list) { |
3abe4adb | 504 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
505 | continue; |
506 | ||
507 | /* DEL+ADD in the same orig interval have no effect and can be | |
508 | * removed to avoid silly behaviour on the receiver side. The | |
509 | * other way around (ADD+DEL) can happen in case of roaming of | |
510 | * a client still in the NEW state. Roaming of NEW clients is | |
511 | * now possible due to automatically recognition of "temporary" | |
512 | * clients | |
513 | */ | |
acd34afa | 514 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
515 | if (!del_op_requested && del_op_entry) |
516 | goto del; | |
517 | if (del_op_requested && !del_op_entry) | |
518 | goto del; | |
3c4f7ab6 AQ |
519 | |
520 | /* this is a second add in the same originator interval. It | |
521 | * means that flags have been changed: update them! | |
522 | */ | |
523 | if (!del_op_requested && !del_op_entry) | |
524 | entry->change.flags = flags; | |
525 | ||
3b643de5 AQ |
526 | continue; |
527 | del: | |
528 | list_del(&entry->list); | |
86452f81 SE |
529 | kmem_cache_free(batadv_tt_change_cache, entry); |
530 | kmem_cache_free(batadv_tt_change_cache, tt_change_node); | |
3b643de5 AQ |
531 | event_removed = true; |
532 | goto unlock; | |
533 | } | |
534 | ||
a73105b8 | 535 | /* track the change in the OGMinterval list */ |
807736f6 | 536 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
537 | |
538 | unlock: | |
807736f6 | 539 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 540 | |
3b643de5 | 541 | if (event_removed) |
807736f6 | 542 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 543 | else |
807736f6 | 544 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
545 | } |
546 | ||
335fbe0f ML |
547 | /** |
548 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
549 | * @changes_num: number of tt changes | |
550 | * | |
62fe710f | 551 | * Return: computed length in bytes. |
335fbe0f ML |
552 | */ |
553 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 554 | { |
335fbe0f | 555 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
556 | } |
557 | ||
298e6e68 AQ |
558 | /** |
559 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
560 | * @tt_len: available space | |
561 | * | |
62fe710f | 562 | * Return: the number of entries. |
298e6e68 | 563 | */ |
6b5e971a | 564 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
565 | { |
566 | return tt_len / batadv_tt_len(1); | |
567 | } | |
568 | ||
a19d3d85 ML |
569 | /** |
570 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
571 | * size when transmitted over the air | |
572 | * @bat_priv: the bat priv with all the soft interface information | |
573 | * | |
62fe710f | 574 | * Return: local translation table size in bytes. |
a19d3d85 ML |
575 | */ |
576 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
577 | { | |
4f248cff SE |
578 | u16 num_vlan = 0; |
579 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
580 | struct batadv_softif_vlan *vlan; |
581 | int hdr_size; | |
582 | ||
583 | rcu_read_lock(); | |
584 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
585 | num_vlan++; | |
586 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
587 | } | |
588 | rcu_read_unlock(); | |
589 | ||
590 | /* header size of tvlv encapsulated tt response payload */ | |
591 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
592 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
593 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
594 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
595 | ||
596 | return hdr_size + batadv_tt_len(tt_local_entries); | |
597 | } | |
598 | ||
56303d34 | 599 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 600 | { |
807736f6 | 601 | if (bat_priv->tt.local_hash) |
5346c35e | 602 | return 0; |
c6c8fea2 | 603 | |
807736f6 | 604 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 605 | |
807736f6 | 606 | if (!bat_priv->tt.local_hash) |
5346c35e | 607 | return -ENOMEM; |
c6c8fea2 | 608 | |
dec05074 AQ |
609 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
610 | &batadv_tt_local_hash_lock_class_key); | |
611 | ||
5346c35e | 612 | return 0; |
c6c8fea2 SE |
613 | } |
614 | ||
068ee6e2 AQ |
615 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
616 | struct batadv_tt_global_entry *tt_global, | |
617 | const char *message) | |
618 | { | |
619 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
620 | "Deleting global tt entry %pM (vid: %d): %s\n", |
621 | tt_global->common.addr, | |
f7a2bd65 | 622 | batadv_print_vid(tt_global->common.vid), message); |
068ee6e2 AQ |
623 | |
624 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 625 | batadv_choose_tt, &tt_global->common); |
5dafd8a6 | 626 | batadv_tt_global_entry_put(tt_global); |
068ee6e2 AQ |
627 | } |
628 | ||
c018ad3d AQ |
629 | /** |
630 | * batadv_tt_local_add - add a new client to the local table or update an | |
631 | * existing client | |
632 | * @soft_iface: netdev struct of the mesh interface | |
633 | * @addr: the mac address of the client to add | |
634 | * @vid: VLAN identifier | |
635 | * @ifindex: index of the interface where the client is connected to (useful to | |
636 | * identify wireless clients) | |
9464d071 AQ |
637 | * @mark: the value contained in the skb->mark field of the received packet (if |
638 | * any) | |
a19d3d85 | 639 | * |
62fe710f | 640 | * Return: true if the client was successfully added, false otherwise. |
c018ad3d | 641 | */ |
6b5e971a SE |
642 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
643 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 644 | { |
56303d34 | 645 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 646 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 647 | struct batadv_tt_global_entry *tt_global = NULL; |
2cd45a06 | 648 | struct net *net = dev_net(soft_iface); |
35df3b29 | 649 | struct batadv_softif_vlan *vlan; |
0c69aecc | 650 | struct net_device *in_dev = NULL; |
10b1bbb4 | 651 | struct batadv_hard_iface *in_hardif = NULL; |
db08e6e5 | 652 | struct hlist_head *head; |
56303d34 | 653 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 654 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
655 | bool ret = false; |
656 | bool roamed_back = false; | |
6b5e971a SE |
657 | u8 remote_flags; |
658 | u32 match_mark; | |
c6c8fea2 | 659 | |
0c69aecc | 660 | if (ifindex != BATADV_NULL_IFINDEX) |
2cd45a06 | 661 | in_dev = dev_get_by_index(net, ifindex); |
0c69aecc | 662 | |
10b1bbb4 SE |
663 | if (in_dev) |
664 | in_hardif = batadv_hardif_get_by_netdev(in_dev); | |
665 | ||
c018ad3d | 666 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
667 | |
668 | if (!is_multicast_ether_addr(addr)) | |
669 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 670 | |
47c94655 AQ |
671 | if (tt_local) { |
672 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
673 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
674 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 | 675 | "Re-adding pending client %pM (vid: %d)\n", |
f7a2bd65 | 676 | addr, batadv_print_vid(vid)); |
068ee6e2 AQ |
677 | /* whatever the reason why the PENDING flag was set, |
678 | * this is a client which was enqueued to be removed in | |
679 | * this orig_interval. Since it popped up again, the | |
680 | * flag can be reset like it was never enqueued | |
681 | */ | |
682 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
683 | goto add_event; | |
684 | } | |
685 | ||
686 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
687 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 | 688 | "Roaming client %pM (vid: %d) came back to its original location\n", |
f7a2bd65 | 689 | addr, batadv_print_vid(vid)); |
068ee6e2 AQ |
690 | /* the ROAM flag is set because this client roamed away |
691 | * and the node got a roaming_advertisement message. Now | |
692 | * that the client popped up again at its original | |
693 | * location such flag can be unset | |
694 | */ | |
695 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
696 | roamed_back = true; | |
697 | } | |
698 | goto check_roaming; | |
c6c8fea2 SE |
699 | } |
700 | ||
a19d3d85 ML |
701 | /* Ignore the client if we cannot send it in a full table response. */ |
702 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
703 | table_size += batadv_tt_len(1); | |
704 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
705 | if (table_size > packet_size_max) { | |
706 | net_ratelimited_function(batadv_info, soft_iface, | |
707 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
708 | table_size, packet_size_max, addr); | |
709 | goto out; | |
710 | } | |
711 | ||
86452f81 | 712 | tt_local = kmem_cache_alloc(batadv_tl_cache, GFP_ATOMIC); |
47c94655 | 713 | if (!tt_local) |
7683fdc1 | 714 | goto out; |
a73105b8 | 715 | |
35df3b29 AQ |
716 | /* increase the refcounter of the related vlan */ |
717 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
0b3dd7df SW |
718 | if (!vlan) { |
719 | net_ratelimited_function(batadv_info, soft_iface, | |
720 | "adding TT local entry %pM to non-existent VLAN %d\n", | |
f7a2bd65 | 721 | addr, batadv_print_vid(vid)); |
86452f81 | 722 | kmem_cache_free(batadv_tl_cache, tt_local); |
fd7dec25 | 723 | tt_local = NULL; |
354136bc | 724 | goto out; |
fd7dec25 | 725 | } |
35df3b29 | 726 | |
39c75a51 | 727 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 728 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
f7a2bd65 | 729 | addr, batadv_print_vid(vid), |
6b5e971a | 730 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 731 | |
8fdd0153 | 732 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
733 | /* The local entry has to be marked as NEW to avoid to send it in |
734 | * a full table response going out before the next ttvn increment | |
735 | * (consistency check) | |
736 | */ | |
737 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 738 | tt_local->common.vid = vid; |
10b1bbb4 | 739 | if (batadv_is_wifi_hardif(in_hardif)) |
47c94655 | 740 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
92dcdf09 | 741 | kref_init(&tt_local->common.refcount); |
47c94655 AQ |
742 | tt_local->last_seen = jiffies; |
743 | tt_local->common.added_at = tt_local->last_seen; | |
a33d970d | 744 | tt_local->vlan = vlan; |
c6c8fea2 | 745 | |
c5caf4ef LL |
746 | /* the batman interface mac and multicast addresses should never be |
747 | * purged | |
748 | */ | |
749 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
750 | is_multicast_ether_addr(addr)) | |
47c94655 | 751 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 752 | |
e3387b26 | 753 | kref_get(&tt_local->common.refcount); |
807736f6 | 754 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 755 | batadv_choose_tt, &tt_local->common, |
47c94655 | 756 | &tt_local->common.hash_entry); |
80b3f58c SW |
757 | |
758 | if (unlikely(hash_added != 0)) { | |
759 | /* remove the reference for the hash */ | |
95c0db90 | 760 | batadv_tt_local_entry_put(tt_local); |
80b3f58c SW |
761 | goto out; |
762 | } | |
763 | ||
068ee6e2 | 764 | add_event: |
3abe4adb | 765 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 766 | |
068ee6e2 AQ |
767 | check_roaming: |
768 | /* Check whether it is a roaming, but don't do anything if the roaming | |
769 | * process has already been handled | |
770 | */ | |
771 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 772 | /* These node are probably going to update their tt table */ |
47c94655 | 773 | head = &tt_global->orig_list; |
db08e6e5 | 774 | rcu_read_lock(); |
b67bfe0d | 775 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 776 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 777 | tt_global->common.vid, |
a513088d | 778 | orig_entry->orig_node); |
db08e6e5 SW |
779 | } |
780 | rcu_read_unlock(); | |
068ee6e2 AQ |
781 | if (roamed_back) { |
782 | batadv_tt_global_free(bat_priv, tt_global, | |
783 | "Roaming canceled"); | |
784 | tt_global = NULL; | |
785 | } else { | |
786 | /* The global entry has to be marked as ROAMING and | |
787 | * has to be kept for consistency purpose | |
788 | */ | |
789 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
790 | tt_global->roam_at = jiffies; | |
791 | } | |
7683fdc1 | 792 | } |
068ee6e2 | 793 | |
3c4f7ab6 AQ |
794 | /* store the current remote flags before altering them. This helps |
795 | * understanding is flags are changing or not | |
796 | */ | |
797 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
798 | ||
10b1bbb4 | 799 | if (batadv_is_wifi_hardif(in_hardif)) |
3c4f7ab6 AQ |
800 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
801 | else | |
802 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 803 | |
9464d071 AQ |
804 | /* check the mark in the skb: if it's equal to the configured |
805 | * isolation_mark, it means the packet is coming from an isolated | |
806 | * non-mesh client | |
807 | */ | |
808 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
809 | if (bat_priv->isolation_mark_mask && | |
810 | match_mark == bat_priv->isolation_mark) | |
811 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
812 | else | |
813 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
814 | ||
3c4f7ab6 AQ |
815 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
816 | * entry so that all the nodes can get the new flags | |
817 | */ | |
818 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
819 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
820 | ||
821 | ret = true; | |
7683fdc1 | 822 | out: |
10b1bbb4 SE |
823 | if (in_hardif) |
824 | batadv_hardif_put(in_hardif); | |
0c69aecc AQ |
825 | if (in_dev) |
826 | dev_put(in_dev); | |
47c94655 | 827 | if (tt_local) |
95c0db90 | 828 | batadv_tt_local_entry_put(tt_local); |
47c94655 | 829 | if (tt_global) |
5dafd8a6 | 830 | batadv_tt_global_entry_put(tt_global); |
a19d3d85 | 831 | return ret; |
c6c8fea2 SE |
832 | } |
833 | ||
7ea7b4a1 AQ |
834 | /** |
835 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
836 | * within a TT Response directed to another node | |
837 | * @orig_node: originator for which the TT data has to be prepared | |
838 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
839 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
840 | * changed can be stored | |
841 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
842 | * function reserves the amount of space needed to send the entire global TT | |
843 | * table. In case of success the value is updated with the real amount of | |
844 | * reserved bytes | |
7ea7b4a1 AQ |
845 | * Allocate the needed amount of memory for the entire TT TVLV and write its |
846 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
847 | * objects, one per active VLAN served by the originator node. | |
848 | * | |
62fe710f | 849 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 850 | */ |
6b5e971a | 851 | static u16 |
7ea7b4a1 AQ |
852 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
853 | struct batadv_tvlv_tt_data **tt_data, | |
854 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 855 | s32 *tt_len) |
7ea7b4a1 | 856 | { |
4f248cff SE |
857 | u16 num_vlan = 0; |
858 | u16 num_entries = 0; | |
859 | u16 change_offset; | |
860 | u16 tvlv_len; | |
7ea7b4a1 AQ |
861 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
862 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 863 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
864 | |
865 | rcu_read_lock(); | |
d0fa4f3f | 866 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
867 | num_vlan++; |
868 | num_entries += atomic_read(&vlan->tt.num_entries); | |
869 | } | |
870 | ||
871 | change_offset = sizeof(**tt_data); | |
872 | change_offset += num_vlan * sizeof(*tt_vlan); | |
873 | ||
874 | /* if tt_len is negative, allocate the space needed by the full table */ | |
875 | if (*tt_len < 0) | |
876 | *tt_len = batadv_tt_len(num_entries); | |
877 | ||
878 | tvlv_len = *tt_len; | |
879 | tvlv_len += change_offset; | |
880 | ||
881 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
882 | if (!*tt_data) { | |
883 | *tt_len = 0; | |
884 | goto out; | |
885 | } | |
886 | ||
887 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
888 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
889 | (*tt_data)->num_vlan = htons(num_vlan); | |
890 | ||
891 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
d0fa4f3f | 892 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
893 | tt_vlan->vid = htons(vlan->vid); |
894 | tt_vlan->crc = htonl(vlan->tt.crc); | |
895 | ||
896 | tt_vlan++; | |
897 | } | |
898 | ||
6b5e971a | 899 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
900 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
901 | ||
902 | out: | |
903 | rcu_read_unlock(); | |
904 | return tvlv_len; | |
905 | } | |
906 | ||
907 | /** | |
908 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
909 | * node | |
910 | * @bat_priv: the bat priv with all the soft interface information | |
911 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
912 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
913 | * changes can be stored | |
914 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
915 | * function reserves the amount of space needed to send the entire local TT | |
916 | * table. In case of success the value is updated with the real amount of | |
917 | * reserved bytes | |
918 | * | |
919 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
920 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
921 | * objects, one per active VLAN. | |
922 | * | |
62fe710f | 923 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 924 | */ |
6b5e971a | 925 | static u16 |
7ea7b4a1 AQ |
926 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
927 | struct batadv_tvlv_tt_data **tt_data, | |
928 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 929 | s32 *tt_len) |
7ea7b4a1 AQ |
930 | { |
931 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
932 | struct batadv_softif_vlan *vlan; | |
4f248cff SE |
933 | u16 num_vlan = 0; |
934 | u16 num_entries = 0; | |
935 | u16 tvlv_len; | |
6b5e971a | 936 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
937 | int change_offset; |
938 | ||
939 | rcu_read_lock(); | |
940 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
941 | num_vlan++; | |
942 | num_entries += atomic_read(&vlan->tt.num_entries); | |
943 | } | |
944 | ||
945 | change_offset = sizeof(**tt_data); | |
946 | change_offset += num_vlan * sizeof(*tt_vlan); | |
947 | ||
948 | /* if tt_len is negative, allocate the space needed by the full table */ | |
949 | if (*tt_len < 0) | |
950 | *tt_len = batadv_tt_len(num_entries); | |
951 | ||
952 | tvlv_len = *tt_len; | |
953 | tvlv_len += change_offset; | |
954 | ||
955 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
956 | if (!*tt_data) { | |
957 | tvlv_len = 0; | |
958 | goto out; | |
959 | } | |
960 | ||
961 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
962 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
963 | (*tt_data)->num_vlan = htons(num_vlan); | |
964 | ||
965 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
966 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
967 | tt_vlan->vid = htons(vlan->vid); | |
968 | tt_vlan->crc = htonl(vlan->tt.crc); | |
969 | ||
970 | tt_vlan++; | |
971 | } | |
972 | ||
6b5e971a | 973 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
974 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
975 | ||
976 | out: | |
977 | rcu_read_unlock(); | |
978 | return tvlv_len; | |
979 | } | |
980 | ||
e1bf0c14 ML |
981 | /** |
982 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
983 | * after local tt changes have been committed | |
984 | * @bat_priv: the bat priv with all the soft interface information | |
985 | */ | |
986 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 987 | { |
e1bf0c14 ML |
988 | struct batadv_tt_change_node *entry, *safe; |
989 | struct batadv_tvlv_tt_data *tt_data; | |
990 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 991 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
992 | int tt_diff_entries_num = 0; |
993 | int tt_diff_entries_count = 0; | |
6b5e971a | 994 | u16 tvlv_len; |
be9aa4c1 | 995 | |
7ea7b4a1 AQ |
996 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
997 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
998 | |
999 | /* if we have too many changes for one packet don't send any | |
1000 | * and wait for the tt table request which will be fragmented | |
1001 | */ | |
e1bf0c14 ML |
1002 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
1003 | tt_diff_len = 0; | |
be9aa4c1 | 1004 | |
7ea7b4a1 AQ |
1005 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
1006 | &tt_change, &tt_diff_len); | |
1007 | if (!tvlv_len) | |
e1bf0c14 | 1008 | return; |
be9aa4c1 | 1009 | |
e1bf0c14 | 1010 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 1011 | |
e1bf0c14 ML |
1012 | if (tt_diff_len == 0) |
1013 | goto container_register; | |
be9aa4c1 | 1014 | |
807736f6 SE |
1015 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
1016 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 1017 | |
807736f6 | 1018 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 1019 | list) { |
e1bf0c14 ML |
1020 | if (tt_diff_entries_count < tt_diff_entries_num) { |
1021 | memcpy(tt_change + tt_diff_entries_count, | |
1022 | &entry->change, | |
1023 | sizeof(struct batadv_tvlv_tt_change)); | |
1024 | tt_diff_entries_count++; | |
c6c8fea2 | 1025 | } |
a73105b8 | 1026 | list_del(&entry->list); |
86452f81 | 1027 | kmem_cache_free(batadv_tt_change_cache, entry); |
c6c8fea2 | 1028 | } |
807736f6 | 1029 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
1030 | |
1031 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
1032 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
1033 | kfree(bat_priv->tt.last_changeset); | |
1034 | bat_priv->tt.last_changeset_len = 0; | |
1035 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 1036 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 1037 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 1038 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 1039 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
1040 | * instead of providing the diff |
1041 | */ | |
e1bf0c14 | 1042 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 1043 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
1044 | memcpy(bat_priv->tt.last_changeset, |
1045 | tt_change, tt_change_len); | |
1046 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
1047 | } |
1048 | } | |
807736f6 | 1049 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 1050 | |
e1bf0c14 ML |
1051 | container_register: |
1052 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 1053 | tvlv_len); |
e1bf0c14 | 1054 | kfree(tt_data); |
c6c8fea2 SE |
1055 | } |
1056 | ||
dc1cbd14 | 1057 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
08c36d3e | 1058 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1059 | { |
1060 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1061 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1062 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1063 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 1064 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 1065 | struct batadv_hard_iface *primary_if; |
c6c8fea2 | 1066 | struct hlist_head *head; |
6b5e971a | 1067 | u32 i; |
85766a82 AQ |
1068 | int last_seen_secs; |
1069 | int last_seen_msecs; | |
1070 | unsigned long last_seen_jiffies; | |
1071 | bool no_purge; | |
6b5e971a | 1072 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 1073 | |
30da63a6 ML |
1074 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1075 | if (!primary_if) | |
32ae9b22 | 1076 | goto out; |
c6c8fea2 | 1077 | |
86ceb360 | 1078 | seq_printf(seq, |
7ea7b4a1 | 1079 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 1080 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
925a6f37 AQ |
1081 | seq_puts(seq, |
1082 | " Client VID Flags Last seen (CRC )\n"); | |
c6c8fea2 | 1083 | |
c6c8fea2 SE |
1084 | for (i = 0; i < hash->size; i++) { |
1085 | head = &hash->table[i]; | |
1086 | ||
7aadf889 | 1087 | rcu_read_lock(); |
b67bfe0d | 1088 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1089 | head, hash_entry) { |
85766a82 AQ |
1090 | tt_local = container_of(tt_common_entry, |
1091 | struct batadv_tt_local_entry, | |
1092 | common); | |
1093 | last_seen_jiffies = jiffies - tt_local->last_seen; | |
1094 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1095 | last_seen_secs = last_seen_msecs / 1000; | |
1096 | last_seen_msecs = last_seen_msecs % 1000; | |
1097 | ||
1098 | no_purge = tt_common_entry->flags & np_flag; | |
7ea7b4a1 | 1099 | seq_printf(seq, |
dd24ddb2 | 1100 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 1101 | tt_common_entry->addr, |
f7a2bd65 | 1102 | batadv_print_vid(tt_common_entry->vid), |
a2f2b6cd SE |
1103 | ((tt_common_entry->flags & |
1104 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 1105 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
1106 | ((tt_common_entry->flags & |
1107 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
1108 | ((tt_common_entry->flags & | |
1109 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
1110 | ((tt_common_entry->flags & | |
1111 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1112 | ((tt_common_entry->flags & | |
1113 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1114 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 | 1115 | no_purge ? 0 : last_seen_msecs, |
a33d970d | 1116 | tt_local->vlan->tt.crc); |
c6c8fea2 | 1117 | } |
7aadf889 | 1118 | rcu_read_unlock(); |
c6c8fea2 | 1119 | } |
32ae9b22 ML |
1120 | out: |
1121 | if (primary_if) | |
82047ad7 | 1122 | batadv_hardif_put(primary_if); |
30da63a6 | 1123 | return 0; |
c6c8fea2 | 1124 | } |
dc1cbd14 | 1125 | #endif |
c6c8fea2 | 1126 | |
d34f0550 MS |
1127 | /** |
1128 | * batadv_tt_local_dump_entry - Dump one TT local entry into a message | |
1129 | * @msg :Netlink message to dump into | |
1130 | * @portid: Port making netlink request | |
1131 | * @seq: Sequence number of netlink message | |
1132 | * @bat_priv: The bat priv with all the soft interface information | |
1133 | * @common: tt local & tt global common data | |
1134 | * | |
1135 | * Return: Error code, or 0 on success | |
1136 | */ | |
1137 | static int | |
1138 | batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
1139 | struct batadv_priv *bat_priv, | |
1140 | struct batadv_tt_common_entry *common) | |
1141 | { | |
1142 | void *hdr; | |
1143 | struct batadv_softif_vlan *vlan; | |
1144 | struct batadv_tt_local_entry *local; | |
1145 | unsigned int last_seen_msecs; | |
1146 | u32 crc; | |
1147 | ||
1148 | local = container_of(common, struct batadv_tt_local_entry, common); | |
1149 | last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen); | |
1150 | ||
1151 | vlan = batadv_softif_vlan_get(bat_priv, common->vid); | |
1152 | if (!vlan) | |
1153 | return 0; | |
1154 | ||
1155 | crc = vlan->tt.crc; | |
1156 | ||
1157 | batadv_softif_vlan_put(vlan); | |
1158 | ||
1159 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
1160 | NLM_F_MULTI, | |
1161 | BATADV_CMD_GET_TRANSTABLE_LOCAL); | |
1162 | if (!hdr) | |
1163 | return -ENOBUFS; | |
1164 | ||
1165 | if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || | |
1166 | nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || | |
1167 | nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || | |
1168 | nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) | |
1169 | goto nla_put_failure; | |
1170 | ||
1171 | if (!(common->flags & BATADV_TT_CLIENT_NOPURGE) && | |
1172 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, last_seen_msecs)) | |
1173 | goto nla_put_failure; | |
1174 | ||
1175 | genlmsg_end(msg, hdr); | |
1176 | return 0; | |
1177 | ||
1178 | nla_put_failure: | |
1179 | genlmsg_cancel(msg, hdr); | |
1180 | return -EMSGSIZE; | |
1181 | } | |
1182 | ||
1183 | /** | |
1184 | * batadv_tt_local_dump_bucket - Dump one TT local bucket into a message | |
1185 | * @msg: Netlink message to dump into | |
1186 | * @portid: Port making netlink request | |
1187 | * @seq: Sequence number of netlink message | |
1188 | * @bat_priv: The bat priv with all the soft interface information | |
1189 | * @head: Pointer to the list containing the local tt entries | |
1190 | * @idx_s: Number of entries to skip | |
1191 | * | |
1192 | * Return: Error code, or 0 on success | |
1193 | */ | |
1194 | static int | |
1195 | batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
1196 | struct batadv_priv *bat_priv, | |
1197 | struct hlist_head *head, int *idx_s) | |
1198 | { | |
1199 | struct batadv_tt_common_entry *common; | |
1200 | int idx = 0; | |
1201 | ||
1202 | rcu_read_lock(); | |
1203 | hlist_for_each_entry_rcu(common, head, hash_entry) { | |
1204 | if (idx++ < *idx_s) | |
1205 | continue; | |
1206 | ||
1207 | if (batadv_tt_local_dump_entry(msg, portid, seq, bat_priv, | |
1208 | common)) { | |
1209 | rcu_read_unlock(); | |
1210 | *idx_s = idx - 1; | |
1211 | return -EMSGSIZE; | |
1212 | } | |
1213 | } | |
1214 | rcu_read_unlock(); | |
1215 | ||
1216 | *idx_s = 0; | |
1217 | return 0; | |
1218 | } | |
1219 | ||
1220 | /** | |
1221 | * batadv_tt_local_dump - Dump TT local entries into a message | |
1222 | * @msg: Netlink message to dump into | |
1223 | * @cb: Parameters from query | |
1224 | * | |
1225 | * Return: Error code, or 0 on success | |
1226 | */ | |
1227 | int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
1228 | { | |
1229 | struct net *net = sock_net(cb->skb->sk); | |
1230 | struct net_device *soft_iface; | |
1231 | struct batadv_priv *bat_priv; | |
1232 | struct batadv_hard_iface *primary_if = NULL; | |
1233 | struct batadv_hashtable *hash; | |
1234 | struct hlist_head *head; | |
1235 | int ret; | |
1236 | int ifindex; | |
1237 | int bucket = cb->args[0]; | |
1238 | int idx = cb->args[1]; | |
1239 | int portid = NETLINK_CB(cb->skb).portid; | |
1240 | ||
1241 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
1242 | if (!ifindex) | |
1243 | return -EINVAL; | |
1244 | ||
1245 | soft_iface = dev_get_by_index(net, ifindex); | |
1246 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
1247 | ret = -ENODEV; | |
1248 | goto out; | |
1249 | } | |
1250 | ||
1251 | bat_priv = netdev_priv(soft_iface); | |
1252 | ||
1253 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
1254 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { | |
1255 | ret = -ENOENT; | |
1256 | goto out; | |
1257 | } | |
1258 | ||
1259 | hash = bat_priv->tt.local_hash; | |
1260 | ||
1261 | while (bucket < hash->size) { | |
1262 | head = &hash->table[bucket]; | |
1263 | ||
1264 | if (batadv_tt_local_dump_bucket(msg, portid, cb->nlh->nlmsg_seq, | |
1265 | bat_priv, head, &idx)) | |
1266 | break; | |
1267 | ||
1268 | bucket++; | |
1269 | } | |
1270 | ||
1271 | ret = msg->len; | |
1272 | ||
1273 | out: | |
1274 | if (primary_if) | |
1275 | batadv_hardif_put(primary_if); | |
1276 | if (soft_iface) | |
1277 | dev_put(soft_iface); | |
1278 | ||
1279 | cb->args[0] = bucket; | |
1280 | cb->args[1] = idx; | |
1281 | ||
1282 | return ret; | |
1283 | } | |
1284 | ||
56303d34 SE |
1285 | static void |
1286 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1287 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1288 | u16 flags, const char *message) |
c6c8fea2 | 1289 | { |
3abe4adb | 1290 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1291 | |
015758d0 AQ |
1292 | /* The local client has to be marked as "pending to be removed" but has |
1293 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1294 | * response issued before the net ttvn increment (consistency check) |
1295 | */ | |
acd34afa | 1296 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1297 | |
39c75a51 | 1298 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1299 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1300 | tt_local_entry->common.addr, | |
f7a2bd65 | 1301 | batadv_print_vid(tt_local_entry->common.vid), message); |
c6c8fea2 SE |
1302 | } |
1303 | ||
7f91d06c AQ |
1304 | /** |
1305 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1306 | * @bat_priv: the bat priv with all the soft interface information | |
1307 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1308 | * @vid: VLAN identifier |
7f91d06c AQ |
1309 | * @message: message to append to the log on deletion |
1310 | * @roaming: true if the deletion is due to a roaming event | |
1311 | * | |
62fe710f | 1312 | * Return: the flags assigned to the local entry before being deleted |
7f91d06c | 1313 | */ |
6b5e971a SE |
1314 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1315 | unsigned short vid, const char *message, | |
1316 | bool roaming) | |
c6c8fea2 | 1317 | { |
170173bf | 1318 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1319 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
ef72706a | 1320 | void *tt_entry_exists; |
c6c8fea2 | 1321 | |
c018ad3d | 1322 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1323 | if (!tt_local_entry) |
1324 | goto out; | |
1325 | ||
7f91d06c AQ |
1326 | curr_flags = tt_local_entry->common.flags; |
1327 | ||
acd34afa | 1328 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1329 | /* if this global entry addition is due to a roaming, the node has to |
1330 | * mark the local entry as "roamed" in order to correctly reroute | |
1331 | * packets later | |
1332 | */ | |
7c1fd91d | 1333 | if (roaming) { |
acd34afa | 1334 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1335 | /* mark the local client as ROAMed */ |
1336 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1337 | } | |
42d0b044 | 1338 | |
068ee6e2 AQ |
1339 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1340 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1341 | message); | |
1342 | goto out; | |
1343 | } | |
1344 | /* if this client has been added right now, it is possible to | |
1345 | * immediately purge it | |
1346 | */ | |
3abe4adb | 1347 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1348 | |
1349 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1350 | batadv_compare_tt, | |
1351 | batadv_choose_tt, | |
1352 | &tt_local_entry->common); | |
1353 | if (!tt_entry_exists) | |
1354 | goto out; | |
1355 | ||
1356 | /* extra call to free the local tt entry */ | |
95c0db90 | 1357 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c | 1358 | |
7683fdc1 AQ |
1359 | out: |
1360 | if (tt_local_entry) | |
95c0db90 | 1361 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c AQ |
1362 | |
1363 | return curr_flags; | |
c6c8fea2 SE |
1364 | } |
1365 | ||
a19d3d85 ML |
1366 | /** |
1367 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1368 | * @bat_priv: the bat priv with all the soft interface information | |
1369 | * @head: pointer to the list containing the local tt entries | |
1370 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1371 | * inactive or not | |
1372 | */ | |
56303d34 | 1373 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1374 | struct hlist_head *head, |
1375 | int timeout) | |
c6c8fea2 | 1376 | { |
56303d34 SE |
1377 | struct batadv_tt_local_entry *tt_local_entry; |
1378 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1379 | struct hlist_node *node_tmp; |
acd34afa | 1380 | |
b67bfe0d | 1381 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1382 | hash_entry) { |
1383 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1384 | struct batadv_tt_local_entry, |
1385 | common); | |
acd34afa SE |
1386 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1387 | continue; | |
1388 | ||
1389 | /* entry already marked for deletion */ | |
1390 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1391 | continue; | |
1392 | ||
a19d3d85 | 1393 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1394 | continue; |
1395 | ||
1396 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1397 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1398 | } | |
1399 | } | |
1400 | ||
a19d3d85 ML |
1401 | /** |
1402 | * batadv_tt_local_purge - purge inactive tt local entries | |
1403 | * @bat_priv: the bat priv with all the soft interface information | |
1404 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1405 | * inactive or not | |
1406 | */ | |
1407 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1408 | int timeout) | |
acd34afa | 1409 | { |
807736f6 | 1410 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1411 | struct hlist_head *head; |
7683fdc1 | 1412 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1413 | u32 i; |
c6c8fea2 | 1414 | |
c6c8fea2 SE |
1415 | for (i = 0; i < hash->size; i++) { |
1416 | head = &hash->table[i]; | |
7683fdc1 | 1417 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1418 | |
7683fdc1 | 1419 | spin_lock_bh(list_lock); |
a19d3d85 | 1420 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1421 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1422 | } |
c6c8fea2 SE |
1423 | } |
1424 | ||
56303d34 | 1425 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1426 | { |
5bf74e9c | 1427 | struct batadv_hashtable *hash; |
a73105b8 | 1428 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1429 | struct batadv_tt_common_entry *tt_common_entry; |
1430 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 1431 | struct hlist_node *node_tmp; |
7683fdc1 | 1432 | struct hlist_head *head; |
6b5e971a | 1433 | u32 i; |
a73105b8 | 1434 | |
807736f6 | 1435 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1436 | return; |
1437 | ||
807736f6 | 1438 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1439 | |
1440 | for (i = 0; i < hash->size; i++) { | |
1441 | head = &hash->table[i]; | |
1442 | list_lock = &hash->list_locks[i]; | |
1443 | ||
1444 | spin_lock_bh(list_lock); | |
b67bfe0d | 1445 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1446 | head, hash_entry) { |
b67bfe0d | 1447 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1448 | tt_local = container_of(tt_common_entry, |
1449 | struct batadv_tt_local_entry, | |
1450 | common); | |
35df3b29 | 1451 | |
95c0db90 | 1452 | batadv_tt_local_entry_put(tt_local); |
a73105b8 AQ |
1453 | } |
1454 | spin_unlock_bh(list_lock); | |
1455 | } | |
1456 | ||
1a8eaf07 | 1457 | batadv_hash_destroy(hash); |
a73105b8 | 1458 | |
807736f6 | 1459 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1460 | } |
1461 | ||
56303d34 | 1462 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1463 | { |
807736f6 | 1464 | if (bat_priv->tt.global_hash) |
5346c35e | 1465 | return 0; |
c6c8fea2 | 1466 | |
807736f6 | 1467 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1468 | |
807736f6 | 1469 | if (!bat_priv->tt.global_hash) |
5346c35e | 1470 | return -ENOMEM; |
c6c8fea2 | 1471 | |
dec05074 AQ |
1472 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1473 | &batadv_tt_global_hash_lock_class_key); | |
1474 | ||
5346c35e | 1475 | return 0; |
c6c8fea2 SE |
1476 | } |
1477 | ||
56303d34 | 1478 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1479 | { |
56303d34 | 1480 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1481 | |
807736f6 | 1482 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1483 | |
807736f6 | 1484 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1485 | list) { |
1486 | list_del(&entry->list); | |
86452f81 | 1487 | kmem_cache_free(batadv_tt_change_cache, entry); |
a73105b8 | 1488 | } |
c6c8fea2 | 1489 | |
807736f6 SE |
1490 | atomic_set(&bat_priv->tt.local_changes, 0); |
1491 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1492 | } |
c6c8fea2 | 1493 | |
62fe710f | 1494 | /** |
d15cd622 AQ |
1495 | * batadv_tt_global_orig_entry_find - find a TT orig_list_entry |
1496 | * @entry: the TT global entry where the orig_list_entry has to be | |
1497 | * extracted from | |
1498 | * @orig_node: the originator for which the orig_list_entry has to be found | |
62fe710f | 1499 | * |
d15cd622 | 1500 | * retrieve the orig_tt_list_entry belonging to orig_node from the |
d657e621 AQ |
1501 | * batadv_tt_global_entry list |
1502 | * | |
62fe710f | 1503 | * Return: it with an increased refcounter, NULL if not found |
db08e6e5 | 1504 | */ |
d657e621 AQ |
1505 | static struct batadv_tt_orig_list_entry * |
1506 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1507 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1508 | { |
d657e621 | 1509 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1510 | const struct hlist_head *head; |
db08e6e5 SW |
1511 | |
1512 | rcu_read_lock(); | |
1513 | head = &entry->orig_list; | |
b67bfe0d | 1514 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1515 | if (tmp_orig_entry->orig_node != orig_node) |
1516 | continue; | |
6e8ef69d | 1517 | if (!kref_get_unless_zero(&tmp_orig_entry->refcount)) |
d657e621 AQ |
1518 | continue; |
1519 | ||
1520 | orig_entry = tmp_orig_entry; | |
1521 | break; | |
db08e6e5 SW |
1522 | } |
1523 | rcu_read_unlock(); | |
d657e621 AQ |
1524 | |
1525 | return orig_entry; | |
1526 | } | |
1527 | ||
62fe710f | 1528 | /** |
d15cd622 AQ |
1529 | * batadv_tt_global_entry_has_orig - check if a TT global entry is also handled |
1530 | * by a given originator | |
1531 | * @entry: the TT global entry to check | |
1532 | * @orig_node: the originator to search in the list | |
62fe710f SE |
1533 | * |
1534 | * find out if an orig_node is already in the list of a tt_global_entry. | |
1535 | * | |
1536 | * Return: true if found, false otherwise | |
d657e621 AQ |
1537 | */ |
1538 | static bool | |
1539 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1540 | const struct batadv_orig_node *orig_node) | |
1541 | { | |
1542 | struct batadv_tt_orig_list_entry *orig_entry; | |
1543 | bool found = false; | |
1544 | ||
1545 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1546 | if (orig_entry) { | |
1547 | found = true; | |
7e2366c6 | 1548 | batadv_tt_orig_list_entry_put(orig_entry); |
d657e621 AQ |
1549 | } |
1550 | ||
db08e6e5 SW |
1551 | return found; |
1552 | } | |
1553 | ||
54e22f26 LL |
1554 | /** |
1555 | * batadv_tt_global_sync_flags - update TT sync flags | |
1556 | * @tt_global: the TT global entry to update sync flags in | |
1557 | * | |
1558 | * Updates the sync flag bits in the tt_global flag attribute with a logical | |
1559 | * OR of all sync flags from any of its TT orig entries. | |
1560 | */ | |
1561 | static void | |
1562 | batadv_tt_global_sync_flags(struct batadv_tt_global_entry *tt_global) | |
1563 | { | |
1564 | struct batadv_tt_orig_list_entry *orig_entry; | |
1565 | const struct hlist_head *head; | |
1566 | u16 flags = BATADV_NO_FLAGS; | |
1567 | ||
1568 | rcu_read_lock(); | |
1569 | head = &tt_global->orig_list; | |
1570 | hlist_for_each_entry_rcu(orig_entry, head, list) | |
1571 | flags |= orig_entry->flags; | |
1572 | rcu_read_unlock(); | |
1573 | ||
1574 | flags |= tt_global->common.flags & (~BATADV_TT_SYNC_MASK); | |
1575 | tt_global->common.flags = flags; | |
1576 | } | |
1577 | ||
1578 | /** | |
1579 | * batadv_tt_global_orig_entry_add - add or update a TT orig entry | |
1580 | * @tt_global: the TT global entry to add an orig entry in | |
1581 | * @orig_node: the originator to add an orig entry for | |
1582 | * @ttvn: translation table version number of this changeset | |
1583 | * @flags: TT sync flags | |
1584 | */ | |
a513088d | 1585 | static void |
d657e621 | 1586 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
54e22f26 LL |
1587 | struct batadv_orig_node *orig_node, int ttvn, |
1588 | u8 flags) | |
db08e6e5 | 1589 | { |
56303d34 | 1590 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1591 | |
d657e621 | 1592 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1593 | if (orig_entry) { |
1594 | /* refresh the ttvn: the current value could be a bogus one that | |
1595 | * was added during a "temporary client detection" | |
1596 | */ | |
1597 | orig_entry->ttvn = ttvn; | |
54e22f26 LL |
1598 | orig_entry->flags = flags; |
1599 | goto sync_flags; | |
30cfd02b | 1600 | } |
d657e621 | 1601 | |
86452f81 | 1602 | orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC); |
db08e6e5 | 1603 | if (!orig_entry) |
d657e621 | 1604 | goto out; |
db08e6e5 SW |
1605 | |
1606 | INIT_HLIST_NODE(&orig_entry->list); | |
7c124391 | 1607 | kref_get(&orig_node->refcount); |
7ea7b4a1 | 1608 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1609 | orig_entry->orig_node = orig_node; |
1610 | orig_entry->ttvn = ttvn; | |
54e22f26 | 1611 | orig_entry->flags = flags; |
6e8ef69d | 1612 | kref_init(&orig_entry->refcount); |
db08e6e5 | 1613 | |
d657e621 | 1614 | spin_lock_bh(&tt_global->list_lock); |
23f55485 | 1615 | kref_get(&orig_entry->refcount); |
db08e6e5 | 1616 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1617 | &tt_global->orig_list); |
1618 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1619 | atomic_inc(&tt_global->orig_list_count); |
1620 | ||
54e22f26 LL |
1621 | sync_flags: |
1622 | batadv_tt_global_sync_flags(tt_global); | |
d657e621 AQ |
1623 | out: |
1624 | if (orig_entry) | |
7e2366c6 | 1625 | batadv_tt_orig_list_entry_put(orig_entry); |
db08e6e5 SW |
1626 | } |
1627 | ||
d4ff40f6 AQ |
1628 | /** |
1629 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1630 | * @bat_priv: the bat priv with all the soft interface information | |
1631 | * @orig_node: the originator announcing the client | |
1632 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1633 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1634 | * @flags: TT flags that have to be set for this non-mesh client |
1635 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1636 | * | |
1637 | * Add a new TT global entry for the given originator. If the entry already | |
1638 | * exists add a new reference to the given originator (a global entry can have | |
1639 | * references to multiple originators) and adjust the flags attribute to reflect | |
1640 | * the function argument. | |
1641 | * If a TT local entry exists for this non-mesh client remove it. | |
1642 | * | |
1643 | * The caller must hold orig_node refcount. | |
1e5d49fc | 1644 | * |
62fe710f | 1645 | * Return: true if the new entry has been added, false otherwise |
d4ff40f6 | 1646 | */ |
1e5d49fc AQ |
1647 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1648 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1649 | const unsigned char *tt_addr, |
6b5e971a | 1650 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1651 | { |
170173bf SE |
1652 | struct batadv_tt_global_entry *tt_global_entry; |
1653 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1654 | bool ret = false; |
80b3f58c | 1655 | int hash_added; |
56303d34 | 1656 | struct batadv_tt_common_entry *common; |
6b5e971a | 1657 | u16 local_flags; |
c6c8fea2 | 1658 | |
cfd4f757 AQ |
1659 | /* ignore global entries from backbone nodes */ |
1660 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1661 | return true; | |
1662 | ||
c018ad3d AQ |
1663 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1664 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1665 | |
1666 | /* if the node already has a local client for this entry, it has to wait | |
1667 | * for a roaming advertisement instead of manually messing up the global | |
1668 | * table | |
1669 | */ | |
1670 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1671 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1672 | goto out; | |
a73105b8 AQ |
1673 | |
1674 | if (!tt_global_entry) { | |
86452f81 SE |
1675 | tt_global_entry = kmem_cache_zalloc(batadv_tg_cache, |
1676 | GFP_ATOMIC); | |
a73105b8 | 1677 | if (!tt_global_entry) |
7683fdc1 AQ |
1678 | goto out; |
1679 | ||
c0a55929 | 1680 | common = &tt_global_entry->common; |
8fdd0153 | 1681 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1682 | common->vid = vid; |
db08e6e5 | 1683 | |
d4f44692 | 1684 | common->flags = flags; |
cc47f66e | 1685 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1686 | /* node must store current time in case of roaming. This is |
1687 | * needed to purge this entry out on timeout (if nobody claims | |
1688 | * it) | |
1689 | */ | |
1690 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1691 | tt_global_entry->roam_at = jiffies; | |
92dcdf09 | 1692 | kref_init(&common->refcount); |
30cfd02b | 1693 | common->added_at = jiffies; |
db08e6e5 SW |
1694 | |
1695 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1696 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1697 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1698 | |
15d5ffde | 1699 | kref_get(&common->refcount); |
807736f6 | 1700 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1701 | batadv_compare_tt, |
c018ad3d | 1702 | batadv_choose_tt, common, |
a513088d | 1703 | &common->hash_entry); |
80b3f58c SW |
1704 | |
1705 | if (unlikely(hash_added != 0)) { | |
1706 | /* remove the reference for the hash */ | |
5dafd8a6 | 1707 | batadv_tt_global_entry_put(tt_global_entry); |
80b3f58c SW |
1708 | goto out_remove; |
1709 | } | |
a73105b8 | 1710 | } else { |
068ee6e2 | 1711 | common = &tt_global_entry->common; |
30cfd02b AQ |
1712 | /* If there is already a global entry, we can use this one for |
1713 | * our processing. | |
068ee6e2 AQ |
1714 | * But if we are trying to add a temporary client then here are |
1715 | * two options at this point: | |
1716 | * 1) the global client is not a temporary client: the global | |
1717 | * client has to be left as it is, temporary information | |
1718 | * should never override any already known client state | |
1719 | * 2) the global client is a temporary client: purge the | |
1720 | * originator list and add the new one orig_entry | |
30cfd02b | 1721 | */ |
068ee6e2 AQ |
1722 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1723 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1724 | goto out; | |
1725 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1726 | orig_node)) | |
1727 | goto out_remove; | |
1728 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1729 | goto add_orig_entry; | |
1730 | } | |
30cfd02b AQ |
1731 | |
1732 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1733 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1734 | * remove the previous temporary orig node and re-add it | |
1735 | * if required. If the orig entry changed, the new one which | |
1736 | * is a non-temporary entry is preferred. | |
30cfd02b | 1737 | */ |
a6cb3909 SW |
1738 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1739 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1740 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1741 | } | |
db08e6e5 | 1742 | |
e9c00136 | 1743 | /* the change can carry possible "attribute" flags like the |
54e22f26 | 1744 | * TT_CLIENT_TEMP, therefore they have to be copied in the |
e9c00136 AQ |
1745 | * client entry |
1746 | */ | |
54e22f26 | 1747 | common->flags |= flags & (~BATADV_TT_SYNC_MASK); |
e9c00136 | 1748 | |
acd34afa SE |
1749 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1750 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1751 | * delete + roaming change for this originator. |
1752 | * | |
1753 | * We should first delete the old originator before adding the | |
1754 | * new one. | |
1755 | */ | |
068ee6e2 | 1756 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1757 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1758 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1759 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1760 | } |
1761 | } | |
068ee6e2 | 1762 | add_orig_entry: |
30cfd02b | 1763 | /* add the new orig_entry (if needed) or update it */ |
54e22f26 LL |
1764 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn, |
1765 | flags & BATADV_TT_SYNC_MASK); | |
c6c8fea2 | 1766 | |
39c75a51 | 1767 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1768 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
f7a2bd65 | 1769 | common->addr, batadv_print_vid(common->vid), |
16052789 | 1770 | orig_node->orig); |
1e5d49fc | 1771 | ret = true; |
c6c8fea2 | 1772 | |
80b3f58c | 1773 | out_remove: |
c5caf4ef LL |
1774 | /* Do not remove multicast addresses from the local hash on |
1775 | * global additions | |
1776 | */ | |
1777 | if (is_multicast_ether_addr(tt_addr)) | |
1778 | goto out; | |
7f91d06c | 1779 | |
a73105b8 | 1780 | /* remove address from local hash if present */ |
c018ad3d | 1781 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1782 | "global tt received", |
c1d07431 | 1783 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1784 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1785 | ||
068ee6e2 AQ |
1786 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1787 | /* this is a normal global add. Therefore the client is not in a | |
1788 | * roaming state anymore. | |
1789 | */ | |
1790 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1791 | ||
7683fdc1 AQ |
1792 | out: |
1793 | if (tt_global_entry) | |
5dafd8a6 | 1794 | batadv_tt_global_entry_put(tt_global_entry); |
068ee6e2 | 1795 | if (tt_local_entry) |
95c0db90 | 1796 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 1797 | return ret; |
c6c8fea2 SE |
1798 | } |
1799 | ||
1b371d13 SW |
1800 | /** |
1801 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1802 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1803 | * @tt_global_entry: global translation table entry to be analyzed |
1804 | * | |
1805 | * This functon assumes the caller holds rcu_read_lock(). | |
62fe710f | 1806 | * Return: best originator list entry or NULL on errors. |
981d8900 SE |
1807 | */ |
1808 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1809 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1810 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1811 | { |
4627456a | 1812 | struct batadv_neigh_node *router, *best_router = NULL; |
29824a55 | 1813 | struct batadv_algo_ops *bao = bat_priv->algo_ops; |
981d8900 | 1814 | struct hlist_head *head; |
981d8900 | 1815 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1816 | |
1817 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1818 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1819 | router = batadv_orig_router_get(orig_entry->orig_node, |
1820 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1821 | if (!router) |
1822 | continue; | |
1823 | ||
4627456a | 1824 | if (best_router && |
29824a55 AQ |
1825 | bao->neigh.cmp(router, BATADV_IF_DEFAULT, best_router, |
1826 | BATADV_IF_DEFAULT) <= 0) { | |
25bb2509 | 1827 | batadv_neigh_node_put(router); |
4627456a | 1828 | continue; |
981d8900 SE |
1829 | } |
1830 | ||
4627456a AQ |
1831 | /* release the refcount for the "old" best */ |
1832 | if (best_router) | |
25bb2509 | 1833 | batadv_neigh_node_put(best_router); |
4627456a AQ |
1834 | |
1835 | best_entry = orig_entry; | |
1836 | best_router = router; | |
981d8900 SE |
1837 | } |
1838 | ||
4627456a | 1839 | if (best_router) |
25bb2509 | 1840 | batadv_neigh_node_put(best_router); |
4627456a | 1841 | |
981d8900 SE |
1842 | return best_entry; |
1843 | } | |
1844 | ||
dc1cbd14 | 1845 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
1b371d13 SW |
1846 | /** |
1847 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1848 | * for this global entry | |
4627456a | 1849 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1850 | * @tt_global_entry: global translation table entry to be printed |
1851 | * @seq: debugfs table seq_file struct | |
1852 | * | |
1853 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1854 | */ |
a513088d | 1855 | static void |
4627456a AQ |
1856 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1857 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1858 | struct seq_file *seq) |
db08e6e5 | 1859 | { |
981d8900 | 1860 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1861 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1862 | struct batadv_orig_node_vlan *vlan; |
1863 | struct hlist_head *head; | |
6b5e971a SE |
1864 | u8 last_ttvn; |
1865 | u16 flags; | |
db08e6e5 SW |
1866 | |
1867 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1868 | flags = tt_common_entry->flags; |
1869 | ||
4627456a | 1870 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1871 | if (best_entry) { |
7ea7b4a1 AQ |
1872 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1873 | tt_common_entry->vid); | |
1874 | if (!vlan) { | |
1875 | seq_printf(seq, | |
1876 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
f7a2bd65 | 1877 | batadv_print_vid(tt_common_entry->vid), |
7ea7b4a1 AQ |
1878 | best_entry->orig_node->orig); |
1879 | goto print_list; | |
1880 | } | |
1881 | ||
981d8900 | 1882 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1883 | seq_printf(seq, |
dd24ddb2 | 1884 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1885 | '*', tt_global_entry->common.addr, |
f7a2bd65 | 1886 | batadv_print_vid(tt_global_entry->common.vid), |
981d8900 | 1887 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1888 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1889 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1890 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1891 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1892 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 | 1893 | |
21754e25 | 1894 | batadv_orig_node_vlan_put(vlan); |
981d8900 | 1895 | } |
db08e6e5 | 1896 | |
7ea7b4a1 | 1897 | print_list: |
db08e6e5 SW |
1898 | head = &tt_global_entry->orig_list; |
1899 | ||
b67bfe0d | 1900 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1901 | if (best_entry == orig_entry) |
1902 | continue; | |
1903 | ||
7ea7b4a1 AQ |
1904 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1905 | tt_common_entry->vid); | |
1906 | if (!vlan) { | |
1907 | seq_printf(seq, | |
1908 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
f7a2bd65 | 1909 | batadv_print_vid(tt_common_entry->vid), |
7ea7b4a1 AQ |
1910 | orig_entry->orig_node->orig); |
1911 | continue; | |
1912 | } | |
1913 | ||
db08e6e5 | 1914 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1915 | seq_printf(seq, |
dd24ddb2 | 1916 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1917 | '+', tt_global_entry->common.addr, |
f7a2bd65 | 1918 | batadv_print_vid(tt_global_entry->common.vid), |
981d8900 | 1919 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1920 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1921 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1922 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1923 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1924 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 | 1925 | |
21754e25 | 1926 | batadv_orig_node_vlan_put(vlan); |
db08e6e5 SW |
1927 | } |
1928 | } | |
1929 | ||
08c36d3e | 1930 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1931 | { |
1932 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1933 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1934 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1935 | struct batadv_tt_common_entry *tt_common_entry; |
1936 | struct batadv_tt_global_entry *tt_global; | |
1937 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1938 | struct hlist_head *head; |
6b5e971a | 1939 | u32 i; |
c6c8fea2 | 1940 | |
30da63a6 ML |
1941 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1942 | if (!primary_if) | |
32ae9b22 | 1943 | goto out; |
c6c8fea2 | 1944 | |
2dafb49d AQ |
1945 | seq_printf(seq, |
1946 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1947 | net_dev->name); |
925a6f37 AQ |
1948 | seq_puts(seq, |
1949 | " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n"); | |
c6c8fea2 | 1950 | |
c6c8fea2 SE |
1951 | for (i = 0; i < hash->size; i++) { |
1952 | head = &hash->table[i]; | |
1953 | ||
7aadf889 | 1954 | rcu_read_lock(); |
b67bfe0d | 1955 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1956 | head, hash_entry) { |
56303d34 SE |
1957 | tt_global = container_of(tt_common_entry, |
1958 | struct batadv_tt_global_entry, | |
1959 | common); | |
4627456a | 1960 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1961 | } |
7aadf889 | 1962 | rcu_read_unlock(); |
c6c8fea2 | 1963 | } |
32ae9b22 ML |
1964 | out: |
1965 | if (primary_if) | |
82047ad7 | 1966 | batadv_hardif_put(primary_if); |
30da63a6 | 1967 | return 0; |
c6c8fea2 | 1968 | } |
dc1cbd14 | 1969 | #endif |
c6c8fea2 | 1970 | |
d34f0550 MS |
1971 | /** |
1972 | * batadv_tt_global_dump_subentry - Dump all TT local entries into a message | |
1973 | * @msg: Netlink message to dump into | |
1974 | * @portid: Port making netlink request | |
1975 | * @seq: Sequence number of netlink message | |
1976 | * @common: tt local & tt global common data | |
1977 | * @orig: Originator node announcing a non-mesh client | |
1978 | * @best: Is the best originator for the TT entry | |
1979 | * | |
1980 | * Return: Error code, or 0 on success | |
1981 | */ | |
1982 | static int | |
1983 | batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, | |
1984 | struct batadv_tt_common_entry *common, | |
1985 | struct batadv_tt_orig_list_entry *orig, | |
1986 | bool best) | |
1987 | { | |
54e22f26 | 1988 | u16 flags = (common->flags & (~BATADV_TT_SYNC_MASK)) | orig->flags; |
d34f0550 MS |
1989 | void *hdr; |
1990 | struct batadv_orig_node_vlan *vlan; | |
1991 | u8 last_ttvn; | |
1992 | u32 crc; | |
1993 | ||
1994 | vlan = batadv_orig_node_vlan_get(orig->orig_node, | |
1995 | common->vid); | |
1996 | if (!vlan) | |
1997 | return 0; | |
1998 | ||
1999 | crc = vlan->tt.crc; | |
2000 | ||
2001 | batadv_orig_node_vlan_put(vlan); | |
2002 | ||
2003 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
2004 | NLM_F_MULTI, | |
2005 | BATADV_CMD_GET_TRANSTABLE_GLOBAL); | |
2006 | if (!hdr) | |
2007 | return -ENOBUFS; | |
2008 | ||
2009 | last_ttvn = atomic_read(&orig->orig_node->last_ttvn); | |
2010 | ||
2011 | if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || | |
2012 | nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
2013 | orig->orig_node->orig) || | |
2014 | nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) || | |
2015 | nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) || | |
2016 | nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || | |
2017 | nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || | |
54e22f26 | 2018 | nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, flags)) |
d34f0550 MS |
2019 | goto nla_put_failure; |
2020 | ||
2021 | if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) | |
2022 | goto nla_put_failure; | |
2023 | ||
2024 | genlmsg_end(msg, hdr); | |
2025 | return 0; | |
2026 | ||
2027 | nla_put_failure: | |
2028 | genlmsg_cancel(msg, hdr); | |
2029 | return -EMSGSIZE; | |
2030 | } | |
2031 | ||
2032 | /** | |
2033 | * batadv_tt_global_dump_entry - Dump one TT global entry into a message | |
2034 | * @msg: Netlink message to dump into | |
2035 | * @portid: Port making netlink request | |
2036 | * @seq: Sequence number of netlink message | |
2037 | * @bat_priv: The bat priv with all the soft interface information | |
2038 | * @common: tt local & tt global common data | |
2039 | * @sub_s: Number of entries to skip | |
2040 | * | |
2041 | * This function assumes the caller holds rcu_read_lock(). | |
2042 | * | |
2043 | * Return: Error code, or 0 on success | |
2044 | */ | |
2045 | static int | |
2046 | batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
2047 | struct batadv_priv *bat_priv, | |
2048 | struct batadv_tt_common_entry *common, int *sub_s) | |
2049 | { | |
2050 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; | |
2051 | struct batadv_tt_global_entry *global; | |
2052 | struct hlist_head *head; | |
2053 | int sub = 0; | |
2054 | bool best; | |
2055 | ||
2056 | global = container_of(common, struct batadv_tt_global_entry, common); | |
2057 | best_entry = batadv_transtable_best_orig(bat_priv, global); | |
2058 | head = &global->orig_list; | |
2059 | ||
2060 | hlist_for_each_entry_rcu(orig_entry, head, list) { | |
2061 | if (sub++ < *sub_s) | |
2062 | continue; | |
2063 | ||
2064 | best = (orig_entry == best_entry); | |
2065 | ||
2066 | if (batadv_tt_global_dump_subentry(msg, portid, seq, common, | |
2067 | orig_entry, best)) { | |
2068 | *sub_s = sub - 1; | |
2069 | return -EMSGSIZE; | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | *sub_s = 0; | |
2074 | return 0; | |
2075 | } | |
2076 | ||
2077 | /** | |
2078 | * batadv_tt_global_dump_bucket - Dump one TT local bucket into a message | |
2079 | * @msg: Netlink message to dump into | |
2080 | * @portid: Port making netlink request | |
2081 | * @seq: Sequence number of netlink message | |
2082 | * @bat_priv: The bat priv with all the soft interface information | |
2083 | * @head: Pointer to the list containing the global tt entries | |
2084 | * @idx_s: Number of entries to skip | |
2085 | * @sub: Number of entries to skip | |
2086 | * | |
2087 | * Return: Error code, or 0 on success | |
2088 | */ | |
2089 | static int | |
2090 | batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
2091 | struct batadv_priv *bat_priv, | |
2092 | struct hlist_head *head, int *idx_s, int *sub) | |
2093 | { | |
2094 | struct batadv_tt_common_entry *common; | |
2095 | int idx = 0; | |
2096 | ||
2097 | rcu_read_lock(); | |
2098 | hlist_for_each_entry_rcu(common, head, hash_entry) { | |
2099 | if (idx++ < *idx_s) | |
2100 | continue; | |
2101 | ||
2102 | if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv, | |
2103 | common, sub)) { | |
2104 | rcu_read_unlock(); | |
2105 | *idx_s = idx - 1; | |
2106 | return -EMSGSIZE; | |
2107 | } | |
2108 | } | |
2109 | rcu_read_unlock(); | |
2110 | ||
2111 | *idx_s = 0; | |
2112 | *sub = 0; | |
2113 | return 0; | |
2114 | } | |
2115 | ||
2116 | /** | |
2117 | * batadv_tt_global_dump - Dump TT global entries into a message | |
2118 | * @msg: Netlink message to dump into | |
2119 | * @cb: Parameters from query | |
2120 | * | |
2121 | * Return: Error code, or length of message on success | |
2122 | */ | |
2123 | int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
2124 | { | |
2125 | struct net *net = sock_net(cb->skb->sk); | |
2126 | struct net_device *soft_iface; | |
2127 | struct batadv_priv *bat_priv; | |
2128 | struct batadv_hard_iface *primary_if = NULL; | |
2129 | struct batadv_hashtable *hash; | |
2130 | struct hlist_head *head; | |
2131 | int ret; | |
2132 | int ifindex; | |
2133 | int bucket = cb->args[0]; | |
2134 | int idx = cb->args[1]; | |
2135 | int sub = cb->args[2]; | |
2136 | int portid = NETLINK_CB(cb->skb).portid; | |
2137 | ||
2138 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
2139 | if (!ifindex) | |
2140 | return -EINVAL; | |
2141 | ||
2142 | soft_iface = dev_get_by_index(net, ifindex); | |
2143 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
2144 | ret = -ENODEV; | |
2145 | goto out; | |
2146 | } | |
2147 | ||
2148 | bat_priv = netdev_priv(soft_iface); | |
2149 | ||
2150 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2151 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { | |
2152 | ret = -ENOENT; | |
2153 | goto out; | |
2154 | } | |
2155 | ||
2156 | hash = bat_priv->tt.global_hash; | |
2157 | ||
2158 | while (bucket < hash->size) { | |
2159 | head = &hash->table[bucket]; | |
2160 | ||
2161 | if (batadv_tt_global_dump_bucket(msg, portid, | |
2162 | cb->nlh->nlmsg_seq, bat_priv, | |
2163 | head, &idx, &sub)) | |
2164 | break; | |
2165 | ||
2166 | bucket++; | |
2167 | } | |
2168 | ||
2169 | ret = msg->len; | |
2170 | ||
2171 | out: | |
2172 | if (primary_if) | |
2173 | batadv_hardif_put(primary_if); | |
2174 | if (soft_iface) | |
2175 | dev_put(soft_iface); | |
2176 | ||
2177 | cb->args[0] = bucket; | |
2178 | cb->args[1] = idx; | |
2179 | cb->args[2] = sub; | |
2180 | ||
2181 | return ret; | |
2182 | } | |
2183 | ||
1d8ab8d3 | 2184 | /** |
433ff98f | 2185 | * _batadv_tt_global_del_orig_entry - remove and free an orig_entry |
1d8ab8d3 LL |
2186 | * @tt_global_entry: the global entry to remove the orig_entry from |
2187 | * @orig_entry: the orig entry to remove and free | |
2188 | * | |
2189 | * Remove an orig_entry from its list in the given tt_global_entry and | |
2190 | * free this orig_entry afterwards. | |
433ff98f ML |
2191 | * |
2192 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
2193 | * part of a list. | |
1d8ab8d3 LL |
2194 | */ |
2195 | static void | |
433ff98f ML |
2196 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
2197 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 2198 | { |
2c72d655 SE |
2199 | lockdep_assert_held(&tt_global_entry->list_lock); |
2200 | ||
1d8ab8d3 LL |
2201 | batadv_tt_global_size_dec(orig_entry->orig_node, |
2202 | tt_global_entry->common.vid); | |
2203 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
2204 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
2205 | * being part of a list | |
2206 | */ | |
1d8ab8d3 | 2207 | hlist_del_rcu(&orig_entry->list); |
7e2366c6 | 2208 | batadv_tt_orig_list_entry_put(orig_entry); |
1d8ab8d3 LL |
2209 | } |
2210 | ||
db08e6e5 | 2211 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 2212 | static void |
56303d34 | 2213 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 2214 | { |
db08e6e5 | 2215 | struct hlist_head *head; |
b67bfe0d | 2216 | struct hlist_node *safe; |
56303d34 | 2217 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 2218 | |
db08e6e5 SW |
2219 | spin_lock_bh(&tt_global_entry->list_lock); |
2220 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 2221 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 2222 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 2223 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
2224 | } |
2225 | ||
1d8ab8d3 LL |
2226 | /** |
2227 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
2228 | * @bat_priv: the bat priv with all the soft interface information | |
2229 | * @tt_global_entry: the global entry to remove the orig_node from | |
2230 | * @orig_node: the originator announcing the client | |
2231 | * @message: message to append to the log on deletion | |
2232 | * | |
2233 | * Remove the given orig_node and its according orig_entry from the given | |
2234 | * global tt entry. | |
2235 | */ | |
a513088d | 2236 | static void |
1d8ab8d3 LL |
2237 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
2238 | struct batadv_tt_global_entry *tt_global_entry, | |
2239 | struct batadv_orig_node *orig_node, | |
2240 | const char *message) | |
db08e6e5 SW |
2241 | { |
2242 | struct hlist_head *head; | |
b67bfe0d | 2243 | struct hlist_node *safe; |
56303d34 | 2244 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 2245 | unsigned short vid; |
db08e6e5 SW |
2246 | |
2247 | spin_lock_bh(&tt_global_entry->list_lock); | |
2248 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 2249 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 2250 | if (orig_entry->orig_node == orig_node) { |
16052789 | 2251 | vid = tt_global_entry->common.vid; |
39c75a51 | 2252 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 2253 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 2254 | orig_node->orig, |
16052789 | 2255 | tt_global_entry->common.addr, |
f7a2bd65 | 2256 | batadv_print_vid(vid), message); |
433ff98f ML |
2257 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
2258 | orig_entry); | |
db08e6e5 SW |
2259 | } |
2260 | } | |
2261 | spin_unlock_bh(&tt_global_entry->list_lock); | |
2262 | } | |
2263 | ||
db08e6e5 | 2264 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
2265 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
2266 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 2267 | */ |
a513088d | 2268 | static void |
56303d34 SE |
2269 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
2270 | struct batadv_tt_global_entry *tt_global_entry, | |
2271 | struct batadv_orig_node *orig_node, | |
2272 | const char *message) | |
db08e6e5 SW |
2273 | { |
2274 | bool last_entry = true; | |
2275 | struct hlist_head *head; | |
56303d34 | 2276 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
2277 | |
2278 | /* no local entry exists, case 1: | |
2279 | * Check if this is the last one or if other entries exist. | |
2280 | */ | |
2281 | ||
2282 | rcu_read_lock(); | |
2283 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 2284 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
2285 | if (orig_entry->orig_node != orig_node) { |
2286 | last_entry = false; | |
2287 | break; | |
2288 | } | |
2289 | } | |
2290 | rcu_read_unlock(); | |
2291 | ||
2292 | if (last_entry) { | |
2293 | /* its the last one, mark for roaming. */ | |
acd34afa | 2294 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 2295 | tt_global_entry->roam_at = jiffies; |
1fda4c0a | 2296 | } else { |
db08e6e5 SW |
2297 | /* there is another entry, we can simply delete this |
2298 | * one and can still use the other one. | |
2299 | */ | |
1d8ab8d3 LL |
2300 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
2301 | orig_node, message); | |
1fda4c0a | 2302 | } |
db08e6e5 SW |
2303 | } |
2304 | ||
c018ad3d AQ |
2305 | /** |
2306 | * batadv_tt_global_del - remove a client from the global table | |
2307 | * @bat_priv: the bat priv with all the soft interface information | |
2308 | * @orig_node: an originator serving this client | |
2309 | * @addr: the mac address of the client | |
2310 | * @vid: VLAN identifier | |
2311 | * @message: a message explaining the reason for deleting the client to print | |
2312 | * for debugging purpose | |
2313 | * @roaming: true if the deletion has been triggered by a roaming event | |
2314 | */ | |
56303d34 SE |
2315 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
2316 | struct batadv_orig_node *orig_node, | |
c018ad3d | 2317 | const unsigned char *addr, unsigned short vid, |
a513088d | 2318 | const char *message, bool roaming) |
a73105b8 | 2319 | { |
170173bf | 2320 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 2321 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 2322 | |
c018ad3d | 2323 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 2324 | if (!tt_global_entry) |
7683fdc1 | 2325 | goto out; |
a73105b8 | 2326 | |
db08e6e5 | 2327 | if (!roaming) { |
1d8ab8d3 LL |
2328 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
2329 | orig_node, message); | |
db08e6e5 SW |
2330 | |
2331 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
2332 | batadv_tt_global_free(bat_priv, tt_global_entry, |
2333 | message); | |
db08e6e5 SW |
2334 | |
2335 | goto out; | |
2336 | } | |
92f90f56 SE |
2337 | |
2338 | /* if we are deleting a global entry due to a roam | |
2339 | * event, there are two possibilities: | |
db08e6e5 SW |
2340 | * 1) the client roamed from node A to node B => if there |
2341 | * is only one originator left for this client, we mark | |
acd34afa | 2342 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
2343 | * wait for node B to claim it. In case of timeout |
2344 | * the entry is purged. | |
db08e6e5 SW |
2345 | * |
2346 | * If there are other originators left, we directly delete | |
2347 | * the originator. | |
92f90f56 | 2348 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
2349 | * the global entry, since it is useless now. |
2350 | */ | |
a513088d | 2351 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
2352 | tt_global_entry->common.addr, |
2353 | vid); | |
a513088d | 2354 | if (local_entry) { |
db08e6e5 | 2355 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 2356 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 2357 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
1fda4c0a | 2358 | } else { |
db08e6e5 | 2359 | /* no local entry exists, case 1: check for roaming */ |
a513088d SE |
2360 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
2361 | orig_node, message); | |
1fda4c0a | 2362 | } |
92f90f56 | 2363 | |
cc47f66e | 2364 | out: |
7683fdc1 | 2365 | if (tt_global_entry) |
5dafd8a6 | 2366 | batadv_tt_global_entry_put(tt_global_entry); |
a513088d | 2367 | if (local_entry) |
95c0db90 | 2368 | batadv_tt_local_entry_put(local_entry); |
a73105b8 AQ |
2369 | } |
2370 | ||
95fb130d AQ |
2371 | /** |
2372 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
2373 | * given originator matching the provided vid | |
2374 | * @bat_priv: the bat priv with all the soft interface information | |
2375 | * @orig_node: the originator owning the entries to remove | |
2376 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
2377 | * removed | |
2378 | * @message: debug message to print as "reason" | |
2379 | */ | |
56303d34 SE |
2380 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
2381 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2382 | s32 match_vid, |
56303d34 | 2383 | const char *message) |
c6c8fea2 | 2384 | { |
56303d34 SE |
2385 | struct batadv_tt_global_entry *tt_global; |
2386 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 2387 | u32 i; |
807736f6 | 2388 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 2389 | struct hlist_node *safe; |
a73105b8 | 2390 | struct hlist_head *head; |
7683fdc1 | 2391 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 2392 | unsigned short vid; |
c6c8fea2 | 2393 | |
6e801494 SW |
2394 | if (!hash) |
2395 | return; | |
2396 | ||
a73105b8 AQ |
2397 | for (i = 0; i < hash->size; i++) { |
2398 | head = &hash->table[i]; | |
7683fdc1 | 2399 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 2400 | |
7683fdc1 | 2401 | spin_lock_bh(list_lock); |
b67bfe0d | 2402 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 2403 | head, hash_entry) { |
95fb130d AQ |
2404 | /* remove only matching entries */ |
2405 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
2406 | continue; | |
2407 | ||
56303d34 SE |
2408 | tt_global = container_of(tt_common_entry, |
2409 | struct batadv_tt_global_entry, | |
2410 | common); | |
db08e6e5 | 2411 | |
1d8ab8d3 LL |
2412 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
2413 | orig_node, message); | |
db08e6e5 | 2414 | |
56303d34 | 2415 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 2416 | vid = tt_global->common.vid; |
39c75a51 | 2417 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2418 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2419 | tt_global->common.addr, | |
f7a2bd65 | 2420 | batadv_print_vid(vid), message); |
b67bfe0d | 2421 | hlist_del_rcu(&tt_common_entry->hash_entry); |
5dafd8a6 | 2422 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 | 2423 | } |
a73105b8 | 2424 | } |
7683fdc1 | 2425 | spin_unlock_bh(list_lock); |
c6c8fea2 | 2426 | } |
ac4eebd4 | 2427 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
2428 | } |
2429 | ||
30cfd02b AQ |
2430 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
2431 | char **msg) | |
cc47f66e | 2432 | { |
30cfd02b AQ |
2433 | bool purge = false; |
2434 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
2435 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 2436 | |
30cfd02b AQ |
2437 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
2438 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
2439 | purge = true; | |
2440 | *msg = "Roaming timeout\n"; | |
2441 | } | |
42d0b044 | 2442 | |
30cfd02b AQ |
2443 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
2444 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
2445 | purge = true; | |
2446 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 2447 | } |
30cfd02b AQ |
2448 | |
2449 | return purge; | |
42d0b044 SE |
2450 | } |
2451 | ||
30cfd02b | 2452 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 2453 | { |
807736f6 | 2454 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 2455 | struct hlist_head *head; |
b67bfe0d | 2456 | struct hlist_node *node_tmp; |
7683fdc1 | 2457 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 2458 | u32 i; |
30cfd02b AQ |
2459 | char *msg = NULL; |
2460 | struct batadv_tt_common_entry *tt_common; | |
2461 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 2462 | |
cc47f66e AQ |
2463 | for (i = 0; i < hash->size; i++) { |
2464 | head = &hash->table[i]; | |
7683fdc1 | 2465 | list_lock = &hash->list_locks[i]; |
cc47f66e | 2466 | |
7683fdc1 | 2467 | spin_lock_bh(list_lock); |
b67bfe0d | 2468 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
2469 | hash_entry) { |
2470 | tt_global = container_of(tt_common, | |
2471 | struct batadv_tt_global_entry, | |
2472 | common); | |
2473 | ||
2474 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
2475 | continue; | |
2476 | ||
2477 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
2478 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2479 | tt_global->common.addr, | |
f7a2bd65 | 2480 | batadv_print_vid(tt_global->common.vid), |
16052789 | 2481 | msg); |
30cfd02b | 2482 | |
b67bfe0d | 2483 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b | 2484 | |
5dafd8a6 | 2485 | batadv_tt_global_entry_put(tt_global); |
30cfd02b | 2486 | } |
7683fdc1 | 2487 | spin_unlock_bh(list_lock); |
cc47f66e | 2488 | } |
cc47f66e AQ |
2489 | } |
2490 | ||
56303d34 | 2491 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 2492 | { |
5bf74e9c | 2493 | struct batadv_hashtable *hash; |
7683fdc1 | 2494 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
2495 | struct batadv_tt_common_entry *tt_common_entry; |
2496 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 2497 | struct hlist_node *node_tmp; |
7683fdc1 | 2498 | struct hlist_head *head; |
6b5e971a | 2499 | u32 i; |
7683fdc1 | 2500 | |
807736f6 | 2501 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
2502 | return; |
2503 | ||
807736f6 | 2504 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
2505 | |
2506 | for (i = 0; i < hash->size; i++) { | |
2507 | head = &hash->table[i]; | |
2508 | list_lock = &hash->list_locks[i]; | |
2509 | ||
2510 | spin_lock_bh(list_lock); | |
b67bfe0d | 2511 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 2512 | head, hash_entry) { |
b67bfe0d | 2513 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
2514 | tt_global = container_of(tt_common_entry, |
2515 | struct batadv_tt_global_entry, | |
2516 | common); | |
5dafd8a6 | 2517 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 AQ |
2518 | } |
2519 | spin_unlock_bh(list_lock); | |
2520 | } | |
2521 | ||
1a8eaf07 | 2522 | batadv_hash_destroy(hash); |
7683fdc1 | 2523 | |
807736f6 | 2524 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2525 | } |
2526 | ||
56303d34 SE |
2527 | static bool |
2528 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2529 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd | 2530 | { |
acd34afa SE |
2531 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2532 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
75ae84a4 | 2533 | return true; |
59b699cd | 2534 | |
2d2fcc2a AQ |
2535 | /* check if the two clients are marked as isolated */ |
2536 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2537 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
75ae84a4 | 2538 | return true; |
2d2fcc2a | 2539 | |
75ae84a4 | 2540 | return false; |
59b699cd AQ |
2541 | } |
2542 | ||
c018ad3d AQ |
2543 | /** |
2544 | * batadv_transtable_search - get the mesh destination for a given client | |
2545 | * @bat_priv: the bat priv with all the soft interface information | |
2546 | * @src: mac address of the source client | |
2547 | * @addr: mac address of the destination client | |
2548 | * @vid: VLAN identifier | |
2549 | * | |
62fe710f | 2550 | * Return: a pointer to the originator that was selected as destination in the |
c018ad3d AQ |
2551 | * mesh for contacting the client 'addr', NULL otherwise. |
2552 | * In case of multiple originators serving the same client, the function returns | |
2553 | * the best one (best in terms of metric towards the destination node). | |
2554 | * | |
2555 | * If the two clients are AP isolated the function returns NULL. | |
2556 | */ | |
56303d34 | 2557 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2558 | const u8 *src, |
2559 | const u8 *addr, | |
c018ad3d | 2560 | unsigned short vid) |
c6c8fea2 | 2561 | { |
56303d34 SE |
2562 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2563 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2564 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2565 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2566 | |
eceb22ae | 2567 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2568 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2569 | if (!tt_local_entry || |
2570 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2571 | goto out; |
2572 | } | |
7aadf889 | 2573 | |
c018ad3d | 2574 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2575 | if (!tt_global_entry) |
7b36e8ee | 2576 | goto out; |
7aadf889 | 2577 | |
3d393e47 | 2578 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2579 | * isolation |
2580 | */ | |
a513088d SE |
2581 | if (tt_local_entry && |
2582 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2583 | goto out; |
2584 | ||
db08e6e5 | 2585 | rcu_read_lock(); |
4627456a | 2586 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2587 | /* found anything? */ |
981d8900 SE |
2588 | if (best_entry) |
2589 | orig_node = best_entry->orig_node; | |
7c124391 | 2590 | if (orig_node && !kref_get_unless_zero(&orig_node->refcount)) |
db08e6e5 SW |
2591 | orig_node = NULL; |
2592 | rcu_read_unlock(); | |
981d8900 | 2593 | |
7b36e8ee | 2594 | out: |
3d393e47 | 2595 | if (tt_global_entry) |
5dafd8a6 | 2596 | batadv_tt_global_entry_put(tt_global_entry); |
3d393e47 | 2597 | if (tt_local_entry) |
95c0db90 | 2598 | batadv_tt_local_entry_put(tt_local_entry); |
3d393e47 | 2599 | |
7b36e8ee | 2600 | return orig_node; |
c6c8fea2 | 2601 | } |
a73105b8 | 2602 | |
ced72933 AQ |
2603 | /** |
2604 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2605 | * to the given orig_node | |
2606 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2607 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2608 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2609 | * |
2610 | * This function computes the checksum for the global table corresponding to a | |
2611 | * specific originator. In particular, the checksum is computed as follows: For | |
2612 | * each client connected to the originator the CRC32C of the MAC address and the | |
2613 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2614 | * together. | |
2615 | * | |
2616 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2617 | * produce a unique hash of the table, but since the order which is used to feed | |
2618 | * the CRC32C function affects the result and since every node in the network | |
2619 | * probably sorts the clients differently, the hash function cannot be directly | |
2620 | * computed over the entire table. Hence the CRC32C is used only on | |
2621 | * the single client entry, while all the results are then xor'ed together | |
2622 | * because the XOR operation can combine them all while trying to reduce the | |
2623 | * noise as much as possible. | |
2624 | * | |
62fe710f | 2625 | * Return: the checksum of the global table of a given originator. |
ced72933 | 2626 | */ |
6b5e971a SE |
2627 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2628 | struct batadv_orig_node *orig_node, | |
2629 | unsigned short vid) | |
a73105b8 | 2630 | { |
807736f6 | 2631 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
54e22f26 | 2632 | struct batadv_tt_orig_list_entry *tt_orig; |
56303d34 SE |
2633 | struct batadv_tt_common_entry *tt_common; |
2634 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2635 | struct hlist_head *head; |
6b5e971a SE |
2636 | u32 i, crc_tmp, crc = 0; |
2637 | u8 flags; | |
a30e22ca | 2638 | __be16 tmp_vid; |
a73105b8 AQ |
2639 | |
2640 | for (i = 0; i < hash->size; i++) { | |
2641 | head = &hash->table[i]; | |
2642 | ||
2643 | rcu_read_lock(); | |
b67bfe0d | 2644 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2645 | tt_global = container_of(tt_common, |
2646 | struct batadv_tt_global_entry, | |
2647 | common); | |
7ea7b4a1 AQ |
2648 | /* compute the CRC only for entries belonging to the |
2649 | * VLAN identified by the vid passed as parameter | |
2650 | */ | |
2651 | if (tt_common->vid != vid) | |
2652 | continue; | |
2653 | ||
db08e6e5 SW |
2654 | /* Roaming clients are in the global table for |
2655 | * consistency only. They don't have to be | |
2656 | * taken into account while computing the | |
2657 | * global crc | |
2658 | */ | |
acd34afa | 2659 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2660 | continue; |
30cfd02b AQ |
2661 | /* Temporary clients have not been announced yet, so |
2662 | * they have to be skipped while computing the global | |
2663 | * crc | |
2664 | */ | |
2665 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2666 | continue; | |
db08e6e5 SW |
2667 | |
2668 | /* find out if this global entry is announced by this | |
2669 | * originator | |
2670 | */ | |
54e22f26 LL |
2671 | tt_orig = batadv_tt_global_orig_entry_find(tt_global, |
2672 | orig_node); | |
2673 | if (!tt_orig) | |
db08e6e5 SW |
2674 | continue; |
2675 | ||
a30e22ca AQ |
2676 | /* use network order to read the VID: this ensures that |
2677 | * every node reads the bytes in the same order. | |
2678 | */ | |
2679 | tmp_vid = htons(tt_common->vid); | |
2680 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2681 | |
2682 | /* compute the CRC on flags that have to be kept in sync | |
2683 | * among nodes | |
2684 | */ | |
54e22f26 | 2685 | flags = tt_orig->flags; |
0eb01568 AQ |
2686 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); |
2687 | ||
0ffa9e8d | 2688 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
54e22f26 LL |
2689 | |
2690 | batadv_tt_orig_list_entry_put(tt_orig); | |
a73105b8 AQ |
2691 | } |
2692 | rcu_read_unlock(); | |
2693 | } | |
2694 | ||
ced72933 | 2695 | return crc; |
a73105b8 AQ |
2696 | } |
2697 | ||
ced72933 AQ |
2698 | /** |
2699 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2700 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2701 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2702 | * |
2703 | * For details about the computation, please refer to the documentation for | |
2704 | * batadv_tt_global_crc(). | |
2705 | * | |
62fe710f | 2706 | * Return: the checksum of the local table |
ced72933 | 2707 | */ |
6b5e971a SE |
2708 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2709 | unsigned short vid) | |
a73105b8 | 2710 | { |
807736f6 | 2711 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2712 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2713 | struct hlist_head *head; |
6b5e971a SE |
2714 | u32 i, crc_tmp, crc = 0; |
2715 | u8 flags; | |
a30e22ca | 2716 | __be16 tmp_vid; |
a73105b8 AQ |
2717 | |
2718 | for (i = 0; i < hash->size; i++) { | |
2719 | head = &hash->table[i]; | |
2720 | ||
2721 | rcu_read_lock(); | |
b67bfe0d | 2722 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2723 | /* compute the CRC only for entries belonging to the |
2724 | * VLAN identified by vid | |
2725 | */ | |
2726 | if (tt_common->vid != vid) | |
2727 | continue; | |
2728 | ||
058d0e26 | 2729 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2730 | * account while computing the CRC |
2731 | */ | |
acd34afa | 2732 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2733 | continue; |
ced72933 | 2734 | |
a30e22ca AQ |
2735 | /* use network order to read the VID: this ensures that |
2736 | * every node reads the bytes in the same order. | |
2737 | */ | |
2738 | tmp_vid = htons(tt_common->vid); | |
2739 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2740 | |
2741 | /* compute the CRC on flags that have to be kept in sync | |
2742 | * among nodes | |
2743 | */ | |
2744 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2745 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2746 | ||
0ffa9e8d | 2747 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2748 | } |
a73105b8 AQ |
2749 | rcu_read_unlock(); |
2750 | } | |
2751 | ||
ced72933 | 2752 | return crc; |
a73105b8 AQ |
2753 | } |
2754 | ||
9c4604a2 SE |
2755 | /** |
2756 | * batadv_tt_req_node_release - free tt_req node entry | |
2757 | * @ref: kref pointer of the tt req_node entry | |
2758 | */ | |
2759 | static void batadv_tt_req_node_release(struct kref *ref) | |
2760 | { | |
2761 | struct batadv_tt_req_node *tt_req_node; | |
2762 | ||
2763 | tt_req_node = container_of(ref, struct batadv_tt_req_node, refcount); | |
2764 | ||
86452f81 | 2765 | kmem_cache_free(batadv_tt_req_cache, tt_req_node); |
9c4604a2 SE |
2766 | } |
2767 | ||
2768 | /** | |
2769 | * batadv_tt_req_node_put - decrement the tt_req_node refcounter and | |
2770 | * possibly release it | |
2771 | * @tt_req_node: tt_req_node to be free'd | |
2772 | */ | |
2773 | static void batadv_tt_req_node_put(struct batadv_tt_req_node *tt_req_node) | |
2774 | { | |
2775 | kref_put(&tt_req_node->refcount, batadv_tt_req_node_release); | |
2776 | } | |
2777 | ||
56303d34 | 2778 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2779 | { |
7c26a53b ML |
2780 | struct batadv_tt_req_node *node; |
2781 | struct hlist_node *safe; | |
a73105b8 | 2782 | |
807736f6 | 2783 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2784 | |
7c26a53b ML |
2785 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2786 | hlist_del_init(&node->list); | |
9c4604a2 | 2787 | batadv_tt_req_node_put(node); |
a73105b8 AQ |
2788 | } |
2789 | ||
807736f6 | 2790 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2791 | } |
2792 | ||
56303d34 SE |
2793 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2794 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2795 | const void *tt_buff, |
6b5e971a | 2796 | u16 tt_buff_len) |
a73105b8 | 2797 | { |
a73105b8 | 2798 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2799 | * last OGM (the OGM could carry no changes) |
2800 | */ | |
a73105b8 AQ |
2801 | spin_lock_bh(&orig_node->tt_buff_lock); |
2802 | if (tt_buff_len > 0) { | |
2803 | kfree(orig_node->tt_buff); | |
2804 | orig_node->tt_buff_len = 0; | |
2805 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2806 | if (orig_node->tt_buff) { | |
2807 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2808 | orig_node->tt_buff_len = tt_buff_len; | |
2809 | } | |
2810 | } | |
2811 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2812 | } | |
2813 | ||
56303d34 | 2814 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2815 | { |
7c26a53b ML |
2816 | struct batadv_tt_req_node *node; |
2817 | struct hlist_node *safe; | |
a73105b8 | 2818 | |
807736f6 | 2819 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2820 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2821 | if (batadv_has_timed_out(node->issued_at, |
2822 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2823 | hlist_del_init(&node->list); |
9c4604a2 | 2824 | batadv_tt_req_node_put(node); |
a73105b8 AQ |
2825 | } |
2826 | } | |
807736f6 | 2827 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2828 | } |
2829 | ||
383b8636 ML |
2830 | /** |
2831 | * batadv_tt_req_node_new - search and possibly create a tt_req_node object | |
2832 | * @bat_priv: the bat priv with all the soft interface information | |
2833 | * @orig_node: orig node this request is being issued for | |
2834 | * | |
62fe710f | 2835 | * Return: the pointer to the new tt_req_node struct if no request |
383b8636 | 2836 | * has already been issued for this orig_node, NULL otherwise. |
9cfc7bd6 | 2837 | */ |
56303d34 | 2838 | static struct batadv_tt_req_node * |
383b8636 | 2839 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2840 | struct batadv_orig_node *orig_node) |
a73105b8 | 2841 | { |
56303d34 | 2842 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2843 | |
807736f6 | 2844 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2845 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2846 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2847 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2848 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2849 | goto unlock; |
2850 | } | |
2851 | ||
86452f81 | 2852 | tt_req_node = kmem_cache_alloc(batadv_tt_req_cache, GFP_ATOMIC); |
a73105b8 AQ |
2853 | if (!tt_req_node) |
2854 | goto unlock; | |
2855 | ||
9c4604a2 | 2856 | kref_init(&tt_req_node->refcount); |
8fdd0153 | 2857 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2858 | tt_req_node->issued_at = jiffies; |
2859 | ||
9c4604a2 | 2860 | kref_get(&tt_req_node->refcount); |
7c26a53b | 2861 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2862 | unlock: |
807736f6 | 2863 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2864 | return tt_req_node; |
2865 | } | |
2866 | ||
335fbe0f ML |
2867 | /** |
2868 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2869 | * @entry_ptr: to be checked local tt entry | |
2870 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2871 | * | |
4b426b10 | 2872 | * Return: true if the entry is a valid, false otherwise. |
335fbe0f | 2873 | */ |
4b426b10 | 2874 | static bool batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) |
058d0e26 | 2875 | { |
56303d34 | 2876 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2877 | |
acd34afa | 2878 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
4b426b10 SE |
2879 | return false; |
2880 | return true; | |
058d0e26 AQ |
2881 | } |
2882 | ||
4b426b10 SE |
2883 | static bool batadv_tt_global_valid(const void *entry_ptr, |
2884 | const void *data_ptr) | |
a73105b8 | 2885 | { |
56303d34 SE |
2886 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2887 | const struct batadv_tt_global_entry *tt_global_entry; | |
2888 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2889 | |
30cfd02b AQ |
2890 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2891 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
4b426b10 | 2892 | return false; |
cc47f66e | 2893 | |
56303d34 SE |
2894 | tt_global_entry = container_of(tt_common_entry, |
2895 | struct batadv_tt_global_entry, | |
48100bac AQ |
2896 | common); |
2897 | ||
a513088d | 2898 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2899 | } |
2900 | ||
335fbe0f | 2901 | /** |
7ea7b4a1 AQ |
2902 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2903 | * specified tt hash | |
335fbe0f ML |
2904 | * @bat_priv: the bat priv with all the soft interface information |
2905 | * @hash: hash table containing the tt entries | |
2906 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2907 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2908 | * @valid_cb: function to filter tt change entries |
2909 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2910 | */ |
7ea7b4a1 AQ |
2911 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2912 | struct batadv_hashtable *hash, | |
6b5e971a | 2913 | void *tvlv_buff, u16 tt_len, |
4b426b10 SE |
2914 | bool (*valid_cb)(const void *, |
2915 | const void *), | |
7ea7b4a1 | 2916 | void *cb_data) |
a73105b8 | 2917 | { |
56303d34 | 2918 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2919 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2920 | struct hlist_head *head; |
6b5e971a SE |
2921 | u16 tt_tot, tt_num_entries = 0; |
2922 | u32 i; | |
a73105b8 | 2923 | |
298e6e68 | 2924 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2925 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2926 | |
2927 | rcu_read_lock(); | |
2928 | for (i = 0; i < hash->size; i++) { | |
2929 | head = &hash->table[i]; | |
2930 | ||
b67bfe0d | 2931 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2932 | head, hash_entry) { |
335fbe0f | 2933 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2934 | break; |
2935 | ||
48100bac | 2936 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2937 | continue; |
2938 | ||
8fdd0153 | 2939 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2940 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2941 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2942 | memset(tt_change->reserved, 0, |
2943 | sizeof(tt_change->reserved)); | |
a73105b8 | 2944 | |
335fbe0f | 2945 | tt_num_entries++; |
a73105b8 AQ |
2946 | tt_change++; |
2947 | } | |
2948 | } | |
2949 | rcu_read_unlock(); | |
7ea7b4a1 | 2950 | } |
a73105b8 | 2951 | |
7ea7b4a1 AQ |
2952 | /** |
2953 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2954 | * @orig_node: originator for which the CRCs have to be checked | |
2955 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2956 | * @num_vlan: number of tvlv VLAN entries | |
7ea7b4a1 | 2957 | * |
62fe710f | 2958 | * Return: true if all the received CRCs match the locally stored ones, false |
7ea7b4a1 AQ |
2959 | * otherwise |
2960 | */ | |
2961 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2962 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2963 | u16 num_vlan) |
7ea7b4a1 AQ |
2964 | { |
2965 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2966 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 2967 | int i, orig_num_vlan; |
6b5e971a | 2968 | u32 crc; |
7ea7b4a1 AQ |
2969 | |
2970 | /* check if each received CRC matches the locally stored one */ | |
2971 | for (i = 0; i < num_vlan; i++) { | |
2972 | tt_vlan_tmp = tt_vlan + i; | |
2973 | ||
2974 | /* if orig_node is a backbone node for this VLAN, don't check | |
2975 | * the CRC as we ignore all the global entries over it | |
2976 | */ | |
2977 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2978 | orig_node->orig, |
2979 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2980 | continue; |
2981 | ||
2982 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2983 | ntohs(tt_vlan_tmp->vid)); | |
2984 | if (!vlan) | |
2985 | return false; | |
2986 | ||
91c2b1a9 | 2987 | crc = vlan->tt.crc; |
21754e25 | 2988 | batadv_orig_node_vlan_put(vlan); |
91c2b1a9 AQ |
2989 | |
2990 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2991 | return false; |
2992 | } | |
2993 | ||
c169c59d SW |
2994 | /* check if any excess VLANs exist locally for the originator |
2995 | * which are not mentioned in the TVLV from the originator. | |
2996 | */ | |
2997 | rcu_read_lock(); | |
2998 | orig_num_vlan = 0; | |
2999 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
3000 | orig_num_vlan++; | |
3001 | rcu_read_unlock(); | |
3002 | ||
3003 | if (orig_num_vlan > num_vlan) | |
3004 | return false; | |
3005 | ||
7ea7b4a1 AQ |
3006 | return true; |
3007 | } | |
3008 | ||
3009 | /** | |
3010 | * batadv_tt_local_update_crc - update all the local CRCs | |
3011 | * @bat_priv: the bat priv with all the soft interface information | |
3012 | */ | |
3013 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
3014 | { | |
3015 | struct batadv_softif_vlan *vlan; | |
3016 | ||
3017 | /* recompute the global CRC for each VLAN */ | |
3018 | rcu_read_lock(); | |
3019 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
3020 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
3021 | } | |
3022 | rcu_read_unlock(); | |
3023 | } | |
3024 | ||
3025 | /** | |
3026 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
3027 | * @bat_priv: the bat priv with all the soft interface information | |
3028 | * @orig_node: the orig_node for which the CRCs have to be updated | |
3029 | */ | |
3030 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
3031 | struct batadv_orig_node *orig_node) | |
3032 | { | |
3033 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 3034 | u32 crc; |
7ea7b4a1 AQ |
3035 | |
3036 | /* recompute the global CRC for each VLAN */ | |
3037 | rcu_read_lock(); | |
d0fa4f3f | 3038 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
3039 | /* if orig_node is a backbone node for this VLAN, don't compute |
3040 | * the CRC as we ignore all the global entries over it | |
3041 | */ | |
cfd4f757 AQ |
3042 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
3043 | vlan->vid)) | |
7ea7b4a1 AQ |
3044 | continue; |
3045 | ||
3046 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
3047 | vlan->tt.crc = crc; | |
3048 | } | |
3049 | rcu_read_unlock(); | |
a73105b8 AQ |
3050 | } |
3051 | ||
ced72933 AQ |
3052 | /** |
3053 | * batadv_send_tt_request - send a TT Request message to a given node | |
3054 | * @bat_priv: the bat priv with all the soft interface information | |
3055 | * @dst_orig_node: the destination of the message | |
3056 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
3057 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
3058 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
3059 | * @full_table: ask for the entire translation table if true, while only for the |
3060 | * last TT diff otherwise | |
d15cd622 AQ |
3061 | * |
3062 | * Return: true if the TT Request was sent, false otherwise | |
ced72933 | 3063 | */ |
4b426b10 SE |
3064 | static bool batadv_send_tt_request(struct batadv_priv *bat_priv, |
3065 | struct batadv_orig_node *dst_orig_node, | |
3066 | u8 ttvn, | |
3067 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
3068 | u16 num_vlan, bool full_table) | |
a73105b8 | 3069 | { |
335fbe0f | 3070 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 3071 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
3072 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
3073 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 3074 | bool ret = false; |
7ea7b4a1 | 3075 | int i, size; |
a73105b8 | 3076 | |
e5d89254 | 3077 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
3078 | if (!primary_if) |
3079 | goto out; | |
3080 | ||
3081 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
3082 | * reply from the same orig_node yet |
3083 | */ | |
383b8636 | 3084 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
3085 | if (!tt_req_node) |
3086 | goto out; | |
3087 | ||
7ea7b4a1 AQ |
3088 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
3089 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 3090 | if (!tvlv_tt_data) |
a73105b8 AQ |
3091 | goto out; |
3092 | ||
335fbe0f ML |
3093 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
3094 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
3095 | tvlv_tt_data->num_vlan = htons(num_vlan); |
3096 | ||
3097 | /* send all the CRCs within the request. This is needed by intermediate | |
3098 | * nodes to ensure they have the correct table before replying | |
3099 | */ | |
3100 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
3101 | for (i = 0; i < num_vlan; i++) { | |
3102 | tt_vlan_req->vid = tt_vlan->vid; | |
3103 | tt_vlan_req->crc = tt_vlan->crc; | |
3104 | ||
3105 | tt_vlan_req++; | |
3106 | tt_vlan++; | |
3107 | } | |
a73105b8 AQ |
3108 | |
3109 | if (full_table) | |
335fbe0f | 3110 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3111 | |
bb351ba0 | 3112 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 3113 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 3114 | |
d69909d2 | 3115 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
3116 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
3117 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 3118 | tvlv_tt_data, size); |
335fbe0f | 3119 | ret = true; |
a73105b8 AQ |
3120 | |
3121 | out: | |
a73105b8 | 3122 | if (primary_if) |
82047ad7 | 3123 | batadv_hardif_put(primary_if); |
9c4604a2 | 3124 | |
a73105b8 | 3125 | if (ret && tt_req_node) { |
807736f6 | 3126 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
9c4604a2 SE |
3127 | if (!hlist_unhashed(&tt_req_node->list)) { |
3128 | hlist_del_init(&tt_req_node->list); | |
3129 | batadv_tt_req_node_put(tt_req_node); | |
3130 | } | |
807736f6 | 3131 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 3132 | } |
9c4604a2 SE |
3133 | |
3134 | if (tt_req_node) | |
3135 | batadv_tt_req_node_put(tt_req_node); | |
3136 | ||
335fbe0f | 3137 | kfree(tvlv_tt_data); |
a73105b8 AQ |
3138 | return ret; |
3139 | } | |
3140 | ||
335fbe0f ML |
3141 | /** |
3142 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
3143 | * node's translation table | |
3144 | * @bat_priv: the bat priv with all the soft interface information | |
3145 | * @tt_data: tt data containing the tt request information | |
3146 | * @req_src: mac address of tt request sender | |
3147 | * @req_dst: mac address of tt request recipient | |
3148 | * | |
62fe710f | 3149 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3150 | */ |
3151 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
3152 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3153 | u8 *req_src, u8 *req_dst) |
a73105b8 | 3154 | { |
170173bf | 3155 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 3156 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 3157 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 3158 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 3159 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 3160 | bool ret = false, full_table; |
6b5e971a SE |
3161 | u8 orig_ttvn, req_ttvn; |
3162 | u16 tvlv_len; | |
3163 | s32 tt_len; | |
a73105b8 | 3164 | |
39c75a51 | 3165 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3166 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 3167 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 3168 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
3169 | |
3170 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 3171 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
3172 | if (!req_dst_orig_node) |
3173 | goto out; | |
3174 | ||
335fbe0f | 3175 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
3176 | if (!res_dst_orig_node) |
3177 | goto out; | |
3178 | ||
6b5e971a | 3179 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 3180 | req_ttvn = tt_data->ttvn; |
a73105b8 | 3181 | |
7ea7b4a1 | 3182 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 3183 | /* this node doesn't have the requested data */ |
a73105b8 | 3184 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
3185 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
3186 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
3187 | goto out; |
3188 | ||
015758d0 | 3189 | /* If the full table has been explicitly requested */ |
335fbe0f | 3190 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
3191 | !req_dst_orig_node->tt_buff) |
3192 | full_table = true; | |
3193 | else | |
3194 | full_table = false; | |
3195 | ||
335fbe0f ML |
3196 | /* TT fragmentation hasn't been implemented yet, so send as many |
3197 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 3198 | */ |
a73105b8 AQ |
3199 | if (!full_table) { |
3200 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
3201 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 3202 | |
7ea7b4a1 AQ |
3203 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
3204 | &tvlv_tt_data, | |
3205 | &tt_change, | |
3206 | &tt_len); | |
3207 | if (!tt_len) | |
a73105b8 AQ |
3208 | goto unlock; |
3209 | ||
a73105b8 | 3210 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 3211 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 3212 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
3213 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
3214 | } else { | |
7ea7b4a1 AQ |
3215 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
3216 | * in the initial part | |
3217 | */ | |
3218 | tt_len = -1; | |
3219 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
3220 | &tvlv_tt_data, | |
3221 | &tt_change, | |
3222 | &tt_len); | |
3223 | if (!tt_len) | |
a73105b8 | 3224 | goto out; |
7ea7b4a1 AQ |
3225 | |
3226 | /* fill the rest of the tvlv with the real TT entries */ | |
3227 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
3228 | tt_change, tt_len, | |
3229 | batadv_tt_global_valid, | |
3230 | req_dst_orig_node); | |
a73105b8 AQ |
3231 | } |
3232 | ||
a19d3d85 ML |
3233 | /* Don't send the response, if larger than fragmented packet. */ |
3234 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
3235 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
3236 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
3237 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
3238 | res_dst_orig_node->orig); | |
3239 | goto out; | |
3240 | } | |
3241 | ||
335fbe0f ML |
3242 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
3243 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
3244 | |
3245 | if (full_table) | |
335fbe0f | 3246 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3247 | |
39c75a51 | 3248 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
3249 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
3250 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
3251 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 3252 | |
d69909d2 | 3253 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 3254 | |
335fbe0f | 3255 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
3256 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
3257 | tvlv_len); | |
e91ecfc6 | 3258 | |
335fbe0f | 3259 | ret = true; |
a73105b8 AQ |
3260 | goto out; |
3261 | ||
3262 | unlock: | |
3263 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
3264 | ||
3265 | out: | |
3266 | if (res_dst_orig_node) | |
5d967310 | 3267 | batadv_orig_node_put(res_dst_orig_node); |
a73105b8 | 3268 | if (req_dst_orig_node) |
5d967310 | 3269 | batadv_orig_node_put(req_dst_orig_node); |
335fbe0f | 3270 | kfree(tvlv_tt_data); |
a73105b8 | 3271 | return ret; |
a73105b8 | 3272 | } |
96412690 | 3273 | |
335fbe0f ML |
3274 | /** |
3275 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
3276 | * translation table | |
3277 | * @bat_priv: the bat priv with all the soft interface information | |
3278 | * @tt_data: tt data containing the tt request information | |
3279 | * @req_src: mac address of tt request sender | |
3280 | * | |
62fe710f | 3281 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3282 | */ |
3283 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
3284 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3285 | u8 *req_src) |
a73105b8 | 3286 | { |
335fbe0f | 3287 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 3288 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
3289 | struct batadv_tvlv_tt_change *tt_change; |
3290 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
3291 | u8 my_ttvn, req_ttvn; |
3292 | u16 tvlv_len; | |
a73105b8 | 3293 | bool full_table; |
6b5e971a | 3294 | s32 tt_len; |
a73105b8 | 3295 | |
39c75a51 | 3296 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3297 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 3298 | req_src, tt_data->ttvn, |
a2f2b6cd | 3299 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3300 | |
a70a9aa9 | 3301 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 3302 | |
6b5e971a | 3303 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 3304 | req_ttvn = tt_data->ttvn; |
a73105b8 | 3305 | |
335fbe0f | 3306 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
3307 | if (!orig_node) |
3308 | goto out; | |
3309 | ||
e5d89254 | 3310 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
3311 | if (!primary_if) |
3312 | goto out; | |
3313 | ||
3314 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
3315 | * is too big send the whole local translation table |
3316 | */ | |
335fbe0f | 3317 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 3318 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
3319 | full_table = true; |
3320 | else | |
3321 | full_table = false; | |
3322 | ||
335fbe0f ML |
3323 | /* TT fragmentation hasn't been implemented yet, so send as many |
3324 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 3325 | */ |
a73105b8 | 3326 | if (!full_table) { |
807736f6 | 3327 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 3328 | |
7ea7b4a1 AQ |
3329 | tt_len = bat_priv->tt.last_changeset_len; |
3330 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
3331 | &tvlv_tt_data, | |
3332 | &tt_change, | |
3333 | &tt_len); | |
c2d0f48a | 3334 | if (!tt_len || !tvlv_len) |
a73105b8 AQ |
3335 | goto unlock; |
3336 | ||
335fbe0f | 3337 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 3338 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
3339 | bat_priv->tt.last_changeset_len); |
3340 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 3341 | } else { |
6b5e971a | 3342 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 3343 | |
7ea7b4a1 AQ |
3344 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
3345 | * in the initial part | |
3346 | */ | |
3347 | tt_len = -1; | |
3348 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
3349 | &tvlv_tt_data, | |
3350 | &tt_change, | |
3351 | &tt_len); | |
c2d0f48a | 3352 | if (!tt_len || !tvlv_len) |
a73105b8 | 3353 | goto out; |
7ea7b4a1 AQ |
3354 | |
3355 | /* fill the rest of the tvlv with the real TT entries */ | |
3356 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
3357 | tt_change, tt_len, | |
3358 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
3359 | } |
3360 | ||
335fbe0f ML |
3361 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
3362 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
3363 | |
3364 | if (full_table) | |
335fbe0f | 3365 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3366 | |
39c75a51 | 3367 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
3368 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
3369 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 3370 | |
d69909d2 | 3371 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 3372 | |
335fbe0f | 3373 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
3374 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
3375 | tvlv_len); | |
335fbe0f | 3376 | |
a73105b8 AQ |
3377 | goto out; |
3378 | ||
3379 | unlock: | |
807736f6 | 3380 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 3381 | out: |
a70a9aa9 | 3382 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 3383 | if (orig_node) |
5d967310 | 3384 | batadv_orig_node_put(orig_node); |
a73105b8 | 3385 | if (primary_if) |
82047ad7 | 3386 | batadv_hardif_put(primary_if); |
335fbe0f ML |
3387 | kfree(tvlv_tt_data); |
3388 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
3389 | return true; |
3390 | } | |
3391 | ||
335fbe0f ML |
3392 | /** |
3393 | * batadv_send_tt_response - send reply to tt request | |
3394 | * @bat_priv: the bat priv with all the soft interface information | |
3395 | * @tt_data: tt data containing the tt request information | |
3396 | * @req_src: mac address of tt request sender | |
3397 | * @req_dst: mac address of tt request recipient | |
3398 | * | |
62fe710f | 3399 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3400 | */ |
3401 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
3402 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3403 | u8 *req_src, u8 *req_dst) |
a73105b8 | 3404 | { |
cfd4f757 | 3405 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 3406 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
3407 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
3408 | req_dst); | |
a73105b8 AQ |
3409 | } |
3410 | ||
56303d34 SE |
3411 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
3412 | struct batadv_orig_node *orig_node, | |
335fbe0f | 3413 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3414 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
3415 | { |
3416 | int i; | |
a513088d | 3417 | int roams; |
a73105b8 AQ |
3418 | |
3419 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
3420 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
3421 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
3422 | batadv_tt_global_del(bat_priv, orig_node, |
3423 | (tt_change + i)->addr, | |
c018ad3d | 3424 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
3425 | "tt removed by changes", |
3426 | roams); | |
08c36d3e | 3427 | } else { |
08c36d3e | 3428 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 3429 | (tt_change + i)->addr, |
c018ad3d | 3430 | ntohs((tt_change + i)->vid), |
d4f44692 | 3431 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
3432 | /* In case of problem while storing a |
3433 | * global_entry, we stop the updating | |
3434 | * procedure without committing the | |
3435 | * ttvn change. This will avoid to send | |
3436 | * corrupted data on tt_request | |
3437 | */ | |
3438 | return; | |
08c36d3e | 3439 | } |
a73105b8 | 3440 | } |
ac4eebd4 | 3441 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
3442 | } |
3443 | ||
56303d34 | 3444 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 3445 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
3446 | u8 ttvn, u8 *resp_src, |
3447 | u16 num_entries) | |
a73105b8 | 3448 | { |
170173bf | 3449 | struct batadv_orig_node *orig_node; |
a73105b8 | 3450 | |
335fbe0f | 3451 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3452 | if (!orig_node) |
3453 | goto out; | |
3454 | ||
3455 | /* Purge the old table first.. */ | |
95fb130d AQ |
3456 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
3457 | "Received full table"); | |
a73105b8 | 3458 | |
7ea7b4a1 AQ |
3459 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
3460 | ttvn); | |
a73105b8 AQ |
3461 | |
3462 | spin_lock_bh(&orig_node->tt_buff_lock); | |
3463 | kfree(orig_node->tt_buff); | |
3464 | orig_node->tt_buff_len = 0; | |
3465 | orig_node->tt_buff = NULL; | |
3466 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
3467 | ||
7ea7b4a1 | 3468 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
3469 | |
3470 | out: | |
3471 | if (orig_node) | |
5d967310 | 3472 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3473 | } |
3474 | ||
56303d34 SE |
3475 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
3476 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3477 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 3478 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 3479 | { |
a513088d SE |
3480 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
3481 | tt_num_changes, ttvn); | |
a73105b8 | 3482 | |
e8cf234a AQ |
3483 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
3484 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
3485 | atomic_set(&orig_node->last_ttvn, ttvn); |
3486 | } | |
3487 | ||
c018ad3d AQ |
3488 | /** |
3489 | * batadv_is_my_client - check if a client is served by the local node | |
3490 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 3491 | * @addr: the mac address of the client to check |
c018ad3d AQ |
3492 | * @vid: VLAN identifier |
3493 | * | |
62fe710f | 3494 | * Return: true if the client is served by this node, false otherwise. |
c018ad3d | 3495 | */ |
6b5e971a | 3496 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 3497 | unsigned short vid) |
a73105b8 | 3498 | { |
170173bf | 3499 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 3500 | bool ret = false; |
a73105b8 | 3501 | |
c018ad3d | 3502 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
3503 | if (!tt_local_entry) |
3504 | goto out; | |
058d0e26 | 3505 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
3506 | * consistency purpose) |
3507 | */ | |
7c1fd91d AQ |
3508 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
3509 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 3510 | goto out; |
7683fdc1 AQ |
3511 | ret = true; |
3512 | out: | |
a73105b8 | 3513 | if (tt_local_entry) |
95c0db90 | 3514 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 3515 | return ret; |
a73105b8 AQ |
3516 | } |
3517 | ||
335fbe0f ML |
3518 | /** |
3519 | * batadv_handle_tt_response - process incoming tt reply | |
3520 | * @bat_priv: the bat priv with all the soft interface information | |
3521 | * @tt_data: tt data containing the tt request information | |
3522 | * @resp_src: mac address of tt reply sender | |
3523 | * @num_entries: number of tt change entries appended to the tt data | |
3524 | */ | |
3525 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
3526 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3527 | u8 *resp_src, u16 num_entries) |
a73105b8 | 3528 | { |
7c26a53b ML |
3529 | struct batadv_tt_req_node *node; |
3530 | struct hlist_node *safe; | |
56303d34 | 3531 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 3532 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
3533 | u8 *tvlv_ptr = (u8 *)tt_data; |
3534 | u16 change_offset; | |
a73105b8 | 3535 | |
39c75a51 | 3536 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3537 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 3538 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 3539 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3540 | |
335fbe0f | 3541 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3542 | if (!orig_node) |
3543 | goto out; | |
3544 | ||
a70a9aa9 AQ |
3545 | spin_lock_bh(&orig_node->tt_lock); |
3546 | ||
7ea7b4a1 AQ |
3547 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
3548 | change_offset *= ntohs(tt_data->num_vlan); | |
3549 | change_offset += sizeof(*tt_data); | |
3550 | tvlv_ptr += change_offset; | |
3551 | ||
3552 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 3553 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
3554 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3555 | resp_src, num_entries); | |
96412690 | 3556 | } else { |
335fbe0f ML |
3557 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3558 | tt_data->ttvn, tt_change); | |
96412690 | 3559 | } |
a73105b8 | 3560 | |
a70a9aa9 | 3561 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3562 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3563 | |
3564 | spin_unlock_bh(&orig_node->tt_lock); | |
3565 | ||
a73105b8 | 3566 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3567 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3568 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3569 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3570 | continue; |
7c26a53b | 3571 | hlist_del_init(&node->list); |
9c4604a2 | 3572 | batadv_tt_req_node_put(node); |
a73105b8 | 3573 | } |
7ea7b4a1 | 3574 | |
807736f6 | 3575 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3576 | out: |
3577 | if (orig_node) | |
5d967310 | 3578 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3579 | } |
3580 | ||
56303d34 | 3581 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3582 | { |
56303d34 | 3583 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3584 | |
807736f6 | 3585 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3586 | |
807736f6 | 3587 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e | 3588 | list_del(&node->list); |
86452f81 | 3589 | kmem_cache_free(batadv_tt_roam_cache, node); |
cc47f66e AQ |
3590 | } |
3591 | ||
807736f6 | 3592 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3593 | } |
3594 | ||
56303d34 | 3595 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3596 | { |
56303d34 | 3597 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3598 | |
807736f6 SE |
3599 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3600 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3601 | if (!batadv_has_timed_out(node->first_time, |
3602 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3603 | continue; |
3604 | ||
3605 | list_del(&node->list); | |
86452f81 | 3606 | kmem_cache_free(batadv_tt_roam_cache, node); |
cc47f66e | 3607 | } |
807736f6 | 3608 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3609 | } |
3610 | ||
62fe710f | 3611 | /** |
d15cd622 AQ |
3612 | * batadv_tt_check_roam_count - check if a client has roamed too frequently |
3613 | * @bat_priv: the bat priv with all the soft interface information | |
3614 | * @client: mac address of the roaming client | |
62fe710f SE |
3615 | * |
3616 | * This function checks whether the client already reached the | |
cc47f66e AQ |
3617 | * maximum number of possible roaming phases. In this case the ROAMING_ADV |
3618 | * will not be sent. | |
3619 | * | |
62fe710f | 3620 | * Return: true if the ROAMING_ADV can be sent, false otherwise |
9cfc7bd6 | 3621 | */ |
6b5e971a | 3622 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3623 | { |
56303d34 | 3624 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3625 | bool ret = false; |
3626 | ||
807736f6 | 3627 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3628 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3629 | * reply from the same orig_node yet |
3630 | */ | |
807736f6 | 3631 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3632 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3633 | continue; |
3634 | ||
1eda58bf | 3635 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3636 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3637 | continue; |
3638 | ||
3e34819e | 3639 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3640 | /* Sorry, you roamed too many times! */ |
3641 | goto unlock; | |
3642 | ret = true; | |
3643 | break; | |
3644 | } | |
3645 | ||
3646 | if (!ret) { | |
86452f81 SE |
3647 | tt_roam_node = kmem_cache_alloc(batadv_tt_roam_cache, |
3648 | GFP_ATOMIC); | |
cc47f66e AQ |
3649 | if (!tt_roam_node) |
3650 | goto unlock; | |
3651 | ||
3652 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3653 | atomic_set(&tt_roam_node->counter, |
3654 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3655 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3656 | |
807736f6 | 3657 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3658 | ret = true; |
3659 | } | |
3660 | ||
3661 | unlock: | |
807736f6 | 3662 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3663 | return ret; |
3664 | } | |
3665 | ||
c018ad3d AQ |
3666 | /** |
3667 | * batadv_send_roam_adv - send a roaming advertisement message | |
3668 | * @bat_priv: the bat priv with all the soft interface information | |
3669 | * @client: mac address of the roaming client | |
3670 | * @vid: VLAN identifier | |
3671 | * @orig_node: message destination | |
3672 | * | |
3673 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3674 | * client. This is done to inform the node that from now on all traffic destined | |
3675 | * for this particular roamed client has to be forwarded to the sender of the | |
3676 | * roaming message. | |
3677 | */ | |
6b5e971a | 3678 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3679 | unsigned short vid, |
56303d34 | 3680 | struct batadv_orig_node *orig_node) |
cc47f66e | 3681 | { |
56303d34 | 3682 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3683 | struct batadv_tvlv_roam_adv tvlv_roam; |
3684 | ||
3685 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3686 | if (!primary_if) | |
3687 | goto out; | |
cc47f66e AQ |
3688 | |
3689 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3690 | * already roamed to us too many times |
3691 | */ | |
a513088d | 3692 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3693 | goto out; |
3694 | ||
39c75a51 | 3695 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 3696 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
f7a2bd65 | 3697 | orig_node->orig, client, batadv_print_vid(vid)); |
cc47f66e | 3698 | |
d69909d2 | 3699 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3700 | |
122edaa0 | 3701 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3702 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3703 | |
3704 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3705 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3706 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3707 | |
3708 | out: | |
122edaa0 | 3709 | if (primary_if) |
82047ad7 | 3710 | batadv_hardif_put(primary_if); |
a73105b8 AQ |
3711 | } |
3712 | ||
a513088d | 3713 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3714 | { |
56303d34 | 3715 | struct delayed_work *delayed_work; |
807736f6 | 3716 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3717 | struct batadv_priv *bat_priv; |
3718 | ||
4ba4bc0f | 3719 | delayed_work = to_delayed_work(work); |
807736f6 SE |
3720 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3721 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3722 | |
a19d3d85 | 3723 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3724 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3725 | batadv_tt_req_purge(bat_priv); |
3726 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3727 | |
72414442 AQ |
3728 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3729 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3730 | } |
cc47f66e | 3731 | |
56303d34 | 3732 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3733 | { |
e1bf0c14 ML |
3734 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3735 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3736 | ||
807736f6 | 3737 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3738 | |
a513088d SE |
3739 | batadv_tt_local_table_free(bat_priv); |
3740 | batadv_tt_global_table_free(bat_priv); | |
3741 | batadv_tt_req_list_free(bat_priv); | |
3742 | batadv_tt_changes_list_free(bat_priv); | |
3743 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3744 | |
807736f6 | 3745 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3746 | } |
058d0e26 | 3747 | |
7ea7b4a1 AQ |
3748 | /** |
3749 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3750 | * table and possibly count them in the TT size | |
3751 | * @bat_priv: the bat priv with all the soft interface information | |
3752 | * @flags: the flag to switch | |
3753 | * @enable: whether to set or unset the flag | |
3754 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3755 | */ |
6b5e971a SE |
3756 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3757 | bool enable, bool count) | |
058d0e26 | 3758 | { |
7ea7b4a1 AQ |
3759 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3760 | struct batadv_tt_common_entry *tt_common_entry; | |
058d0e26 | 3761 | struct hlist_head *head; |
6b5e971a | 3762 | u32 i; |
058d0e26 AQ |
3763 | |
3764 | if (!hash) | |
7ea7b4a1 | 3765 | return; |
058d0e26 AQ |
3766 | |
3767 | for (i = 0; i < hash->size; i++) { | |
3768 | head = &hash->table[i]; | |
3769 | ||
3770 | rcu_read_lock(); | |
b67bfe0d | 3771 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3772 | head, hash_entry) { |
697f2531 AQ |
3773 | if (enable) { |
3774 | if ((tt_common_entry->flags & flags) == flags) | |
3775 | continue; | |
3776 | tt_common_entry->flags |= flags; | |
3777 | } else { | |
3778 | if (!(tt_common_entry->flags & flags)) | |
3779 | continue; | |
3780 | tt_common_entry->flags &= ~flags; | |
3781 | } | |
7ea7b4a1 AQ |
3782 | |
3783 | if (!count) | |
3784 | continue; | |
3785 | ||
3786 | batadv_tt_local_size_inc(bat_priv, | |
3787 | tt_common_entry->vid); | |
058d0e26 AQ |
3788 | } |
3789 | rcu_read_unlock(); | |
3790 | } | |
058d0e26 AQ |
3791 | } |
3792 | ||
acd34afa | 3793 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3794 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3795 | { |
807736f6 | 3796 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3797 | struct batadv_tt_common_entry *tt_common; |
3798 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3799 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3800 | struct hlist_head *head; |
3801 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3802 | u32 i; |
058d0e26 AQ |
3803 | |
3804 | if (!hash) | |
3805 | return; | |
3806 | ||
3807 | for (i = 0; i < hash->size; i++) { | |
3808 | head = &hash->table[i]; | |
3809 | list_lock = &hash->list_locks[i]; | |
3810 | ||
3811 | spin_lock_bh(list_lock); | |
b67bfe0d | 3812 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3813 | hash_entry) { |
3814 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3815 | continue; |
3816 | ||
39c75a51 | 3817 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3818 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3819 | tt_common->addr, | |
f7a2bd65 | 3820 | batadv_print_vid(tt_common->vid)); |
058d0e26 | 3821 | |
7ea7b4a1 | 3822 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3823 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3824 | tt_local = container_of(tt_common, |
3825 | struct batadv_tt_local_entry, | |
3826 | common); | |
35df3b29 | 3827 | |
95c0db90 | 3828 | batadv_tt_local_entry_put(tt_local); |
058d0e26 AQ |
3829 | } |
3830 | spin_unlock_bh(list_lock); | |
3831 | } | |
058d0e26 AQ |
3832 | } |
3833 | ||
e1bf0c14 | 3834 | /** |
a19d3d85 ML |
3835 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3836 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3837 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3838 | * |
3839 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3840 | */ |
a19d3d85 | 3841 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3842 | { |
5274cd68 SE |
3843 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3844 | ||
e1bf0c14 ML |
3845 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3846 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3847 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3848 | return; |
e1bf0c14 | 3849 | } |
be9aa4c1 | 3850 | |
7ea7b4a1 | 3851 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3852 | |
a513088d | 3853 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3854 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3855 | |
3856 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3857 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3858 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3859 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3860 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3861 | |
3862 | /* reset the sending counter */ | |
807736f6 | 3863 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3864 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3865 | } |
a70a9aa9 | 3866 | |
a19d3d85 ML |
3867 | /** |
3868 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3869 | * have been queued in the time since the last commit | |
3870 | * @bat_priv: the bat priv with all the soft interface information | |
3871 | */ | |
3872 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3873 | { | |
3874 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3875 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3876 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3877 | } |
59b699cd | 3878 | |
6b5e971a SE |
3879 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3880 | unsigned short vid) | |
59b699cd | 3881 | { |
393b299d ME |
3882 | struct batadv_tt_local_entry *tt_local_entry; |
3883 | struct batadv_tt_global_entry *tt_global_entry; | |
b8cbd81d | 3884 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3885 | bool ret = false; |
59b699cd | 3886 | |
b8cbd81d | 3887 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3888 | if (!vlan) |
3889 | return false; | |
3890 | ||
3891 | if (!atomic_read(&vlan->ap_isolation)) | |
393b299d | 3892 | goto vlan_put; |
59b699cd | 3893 | |
b8cbd81d | 3894 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd | 3895 | if (!tt_local_entry) |
393b299d | 3896 | goto vlan_put; |
59b699cd | 3897 | |
b8cbd81d | 3898 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd | 3899 | if (!tt_global_entry) |
393b299d | 3900 | goto local_entry_put; |
59b699cd | 3901 | |
393b299d ME |
3902 | if (_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
3903 | ret = true; | |
59b699cd | 3904 | |
393b299d ME |
3905 | batadv_tt_global_entry_put(tt_global_entry); |
3906 | local_entry_put: | |
3907 | batadv_tt_local_entry_put(tt_local_entry); | |
3908 | vlan_put: | |
9c3bf081 | 3909 | batadv_softif_vlan_put(vlan); |
59b699cd AQ |
3910 | return ret; |
3911 | } | |
a943cac1 | 3912 | |
e1bf0c14 ML |
3913 | /** |
3914 | * batadv_tt_update_orig - update global translation table with new tt | |
3915 | * information received via ogms | |
3916 | * @bat_priv: the bat priv with all the soft interface information | |
e51f0397 SE |
3917 | * @orig_node: the orig_node of the ogm |
3918 | * @tt_buff: pointer to the first tvlv VLAN entry | |
7ea7b4a1 AQ |
3919 | * @tt_num_vlan: number of tvlv VLAN entries |
3920 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3921 | * @tt_num_changes: number of tt changes inside the tt buffer |
3922 | * @ttvn: translation table version number of this changeset | |
e1bf0c14 ML |
3923 | */ |
3924 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3925 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3926 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3927 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3928 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3929 | { |
6b5e971a | 3930 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3931 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3932 | bool full_table = true; |
e17931d1 | 3933 | bool has_tt_init; |
a943cac1 | 3934 | |
7ea7b4a1 | 3935 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3936 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3937 | &orig_node->capa_initialized); | |
e17931d1 | 3938 | |
17071578 | 3939 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3940 | * increased by one -> we can apply the attached changes |
3941 | */ | |
e17931d1 | 3942 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3943 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3944 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3945 | * times. | |
9cfc7bd6 SE |
3946 | * In this case send a tt request |
3947 | */ | |
a943cac1 ML |
3948 | if (!tt_num_changes) { |
3949 | full_table = false; | |
3950 | goto request_table; | |
3951 | } | |
3952 | ||
a70a9aa9 AQ |
3953 | spin_lock_bh(&orig_node->tt_lock); |
3954 | ||
a513088d | 3955 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3956 | ttvn, tt_change); |
a943cac1 ML |
3957 | |
3958 | /* Even if we received the precomputed crc with the OGM, we | |
3959 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3960 | * in the global table |
3961 | */ | |
7ea7b4a1 | 3962 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3963 | |
a70a9aa9 AQ |
3964 | spin_unlock_bh(&orig_node->tt_lock); |
3965 | ||
a943cac1 ML |
3966 | /* The ttvn alone is not enough to guarantee consistency |
3967 | * because a single value could represent different states | |
3968 | * (due to the wrap around). Thus a node has to check whether | |
3969 | * the resulting table (after applying the changes) is still | |
3970 | * consistent or not. E.g. a node could disconnect while its | |
3971 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3972 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3973 | * inconsistency |
3974 | */ | |
7ea7b4a1 AQ |
3975 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3976 | tt_num_vlan)) | |
a943cac1 | 3977 | goto request_table; |
a943cac1 ML |
3978 | } else { |
3979 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3980 | * in sync anymore -> request fresh tt data |
3981 | */ | |
e17931d1 | 3982 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3983 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3984 | tt_num_vlan)) { | |
a943cac1 | 3985 | request_table: |
39c75a51 | 3986 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3987 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3988 | orig_node->orig, ttvn, orig_ttvn, | |
3989 | tt_num_changes); | |
a513088d | 3990 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3991 | tt_vlan, tt_num_vlan, |
3992 | full_table); | |
a943cac1 ML |
3993 | return; |
3994 | } | |
3995 | } | |
3996 | } | |
3275e7cc | 3997 | |
c018ad3d AQ |
3998 | /** |
3999 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
4000 | * @bat_priv: the bat priv with all the soft interface information | |
4001 | * @addr: the mac address of the client to check | |
4002 | * @vid: VLAN identifier | |
4003 | * | |
62fe710f | 4004 | * Return: true if we know that the client has moved from its old originator |
c018ad3d AQ |
4005 | * to another one. This entry is still kept for consistency purposes and will be |
4006 | * deleted later by a DEL or because of timeout | |
3275e7cc | 4007 | */ |
56303d34 | 4008 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 4009 | u8 *addr, unsigned short vid) |
3275e7cc | 4010 | { |
56303d34 | 4011 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
4012 | bool ret = false; |
4013 | ||
c018ad3d | 4014 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
4015 | if (!tt_global_entry) |
4016 | goto out; | |
4017 | ||
c1d07431 | 4018 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
5dafd8a6 | 4019 | batadv_tt_global_entry_put(tt_global_entry); |
3275e7cc AQ |
4020 | out: |
4021 | return ret; | |
4022 | } | |
30cfd02b | 4023 | |
7c1fd91d AQ |
4024 | /** |
4025 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
4026 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
4027 | * @addr: the mac address of the local client to query |
4028 | * @vid: VLAN identifier | |
7c1fd91d | 4029 | * |
62fe710f | 4030 | * Return: true if the local client is known to be roaming (it is not served by |
7c1fd91d AQ |
4031 | * this node anymore) or not. If yes, the client is still present in the table |
4032 | * to keep the latter consistent with the node TTVN | |
4033 | */ | |
4034 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 4035 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
4036 | { |
4037 | struct batadv_tt_local_entry *tt_local_entry; | |
4038 | bool ret = false; | |
4039 | ||
c018ad3d | 4040 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
4041 | if (!tt_local_entry) |
4042 | goto out; | |
4043 | ||
4044 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
95c0db90 | 4045 | batadv_tt_local_entry_put(tt_local_entry); |
7c1fd91d AQ |
4046 | out: |
4047 | return ret; | |
7c1fd91d AQ |
4048 | } |
4049 | ||
30cfd02b AQ |
4050 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
4051 | struct batadv_orig_node *orig_node, | |
c018ad3d | 4052 | const unsigned char *addr, |
16052789 | 4053 | unsigned short vid) |
30cfd02b | 4054 | { |
1227c9ae SW |
4055 | /* ignore loop detect macs, they are not supposed to be in the tt local |
4056 | * data as well. | |
4057 | */ | |
4058 | if (batadv_bla_is_loopdetect_mac(addr)) | |
4059 | return false; | |
4060 | ||
16052789 | 4061 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
4062 | BATADV_TT_CLIENT_TEMP, |
4063 | atomic_read(&orig_node->last_ttvn))) | |
75ae84a4 | 4064 | return false; |
30cfd02b AQ |
4065 | |
4066 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 | 4067 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
f7a2bd65 | 4068 | addr, batadv_print_vid(vid), orig_node->orig); |
75ae84a4 SW |
4069 | |
4070 | return true; | |
30cfd02b | 4071 | } |
e1bf0c14 | 4072 | |
a19d3d85 ML |
4073 | /** |
4074 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
4075 | * maximum packet size that can be transported through the mesh | |
4076 | * @soft_iface: netdev struct of the mesh interface | |
4077 | * | |
4078 | * Remove entries older than 'timeout' and half timeout if more entries need | |
4079 | * to be removed. | |
4080 | */ | |
4081 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
4082 | { | |
4083 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
4084 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
4085 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
4086 | bool reduced = false; | |
4087 | ||
4088 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
4089 | ||
4090 | while (true) { | |
4091 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
4092 | if (packet_size_max >= table_size) | |
4093 | break; | |
4094 | ||
4095 | batadv_tt_local_purge(bat_priv, timeout); | |
4096 | batadv_tt_local_purge_pending_clients(bat_priv); | |
4097 | ||
4098 | timeout /= 2; | |
4099 | reduced = true; | |
4100 | net_ratelimited_function(batadv_info, soft_iface, | |
4101 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
4102 | packet_size_max); | |
4103 | } | |
4104 | ||
4105 | /* commit these changes immediately, to avoid synchronization problem | |
4106 | * with the TTVN | |
4107 | */ | |
4108 | if (reduced) | |
4109 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
4110 | ||
4111 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
4112 | } | |
4113 | ||
e1bf0c14 ML |
4114 | /** |
4115 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
4116 | * @bat_priv: the bat priv with all the soft interface information | |
4117 | * @orig: the orig_node of the ogm | |
4118 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
4119 | * @tvlv_value: tvlv buffer containing the gateway data | |
4120 | * @tvlv_value_len: tvlv buffer length | |
4121 | */ | |
4122 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
4123 | struct batadv_orig_node *orig, | |
6b5e971a SE |
4124 | u8 flags, void *tvlv_value, |
4125 | u16 tvlv_value_len) | |
e1bf0c14 | 4126 | { |
7ea7b4a1 AQ |
4127 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
4128 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 4129 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 4130 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
4131 | |
4132 | if (tvlv_value_len < sizeof(*tt_data)) | |
4133 | return; | |
4134 | ||
4135 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
4136 | tvlv_value_len -= sizeof(*tt_data); | |
4137 | ||
7ea7b4a1 AQ |
4138 | num_vlan = ntohs(tt_data->num_vlan); |
4139 | ||
4140 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
4141 | return; | |
4142 | ||
4143 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
4144 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
4145 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
4146 | ||
298e6e68 | 4147 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 4148 | |
7ea7b4a1 AQ |
4149 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
4150 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
4151 | } |
4152 | ||
335fbe0f ML |
4153 | /** |
4154 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
4155 | * container | |
4156 | * @bat_priv: the bat priv with all the soft interface information | |
4157 | * @src: mac address of tt tvlv sender | |
4158 | * @dst: mac address of tt tvlv recipient | |
4159 | * @tvlv_value: tvlv buffer containing the tt data | |
4160 | * @tvlv_value_len: tvlv buffer length | |
4161 | * | |
62fe710f | 4162 | * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS |
335fbe0f ML |
4163 | * otherwise. |
4164 | */ | |
4165 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 4166 | u8 *src, u8 *dst, |
335fbe0f | 4167 | void *tvlv_value, |
6b5e971a | 4168 | u16 tvlv_value_len) |
335fbe0f ML |
4169 | { |
4170 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 4171 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
4172 | char tt_flag; |
4173 | bool ret; | |
4174 | ||
4175 | if (tvlv_value_len < sizeof(*tt_data)) | |
4176 | return NET_RX_SUCCESS; | |
4177 | ||
4178 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
4179 | tvlv_value_len -= sizeof(*tt_data); | |
4180 | ||
7ea7b4a1 AQ |
4181 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
4182 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
4183 | ||
4184 | if (tvlv_value_len < tt_vlan_len) | |
4185 | return NET_RX_SUCCESS; | |
4186 | ||
4187 | tvlv_value_len -= tt_vlan_len; | |
4188 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
4189 | |
4190 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
4191 | case BATADV_TT_REQUEST: | |
4192 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
4193 | ||
4194 | /* If this node cannot provide a TT response the tt_request is | |
4195 | * forwarded | |
4196 | */ | |
4197 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
4198 | if (!ret) { | |
4199 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
4200 | tt_flag = 'F'; | |
4201 | else | |
4202 | tt_flag = '.'; | |
4203 | ||
4204 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4205 | "Routing TT_REQUEST to %pM [%c]\n", | |
4206 | dst, tt_flag); | |
4207 | /* tvlv API will re-route the packet */ | |
4208 | return NET_RX_DROP; | |
4209 | } | |
4210 | break; | |
4211 | case BATADV_TT_RESPONSE: | |
4212 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
4213 | ||
4214 | if (batadv_is_my_mac(bat_priv, dst)) { | |
4215 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 4216 | src, tt_num_entries); |
335fbe0f ML |
4217 | return NET_RX_SUCCESS; |
4218 | } | |
4219 | ||
4220 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
4221 | tt_flag = 'F'; | |
4222 | else | |
4223 | tt_flag = '.'; | |
4224 | ||
4225 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4226 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
4227 | ||
4228 | /* tvlv API will re-route the packet */ | |
4229 | return NET_RX_DROP; | |
4230 | } | |
4231 | ||
4232 | return NET_RX_SUCCESS; | |
4233 | } | |
4234 | ||
122edaa0 ML |
4235 | /** |
4236 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
4237 | * @bat_priv: the bat priv with all the soft interface information | |
4238 | * @src: mac address of tt tvlv sender | |
4239 | * @dst: mac address of tt tvlv recipient | |
4240 | * @tvlv_value: tvlv buffer containing the tt data | |
4241 | * @tvlv_value_len: tvlv buffer length | |
4242 | * | |
62fe710f | 4243 | * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS |
122edaa0 ML |
4244 | * otherwise. |
4245 | */ | |
4246 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 4247 | u8 *src, u8 *dst, |
122edaa0 | 4248 | void *tvlv_value, |
6b5e971a | 4249 | u16 tvlv_value_len) |
122edaa0 ML |
4250 | { |
4251 | struct batadv_tvlv_roam_adv *roaming_adv; | |
4252 | struct batadv_orig_node *orig_node = NULL; | |
4253 | ||
4254 | /* If this node is not the intended recipient of the | |
4255 | * roaming advertisement the packet is forwarded | |
4256 | * (the tvlv API will re-route the packet). | |
4257 | */ | |
4258 | if (!batadv_is_my_mac(bat_priv, dst)) | |
4259 | return NET_RX_DROP; | |
4260 | ||
122edaa0 ML |
4261 | if (tvlv_value_len < sizeof(*roaming_adv)) |
4262 | goto out; | |
4263 | ||
4264 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
4265 | if (!orig_node) | |
4266 | goto out; | |
4267 | ||
4268 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
4269 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
4270 | ||
4271 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4272 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
4273 | src, roaming_adv->client); | |
4274 | ||
4275 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 4276 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
4277 | atomic_read(&orig_node->last_ttvn) + 1); |
4278 | ||
4279 | out: | |
4280 | if (orig_node) | |
5d967310 | 4281 | batadv_orig_node_put(orig_node); |
122edaa0 ML |
4282 | return NET_RX_SUCCESS; |
4283 | } | |
4284 | ||
e1bf0c14 ML |
4285 | /** |
4286 | * batadv_tt_init - initialise the translation table internals | |
4287 | * @bat_priv: the bat priv with all the soft interface information | |
4288 | * | |
62fe710f | 4289 | * Return: 0 on success or negative error number in case of failure. |
e1bf0c14 ML |
4290 | */ |
4291 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
4292 | { | |
4293 | int ret; | |
4294 | ||
0eb01568 AQ |
4295 | /* synchronized flags must be remote */ |
4296 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
4297 | ||
e1bf0c14 ML |
4298 | ret = batadv_tt_local_init(bat_priv); |
4299 | if (ret < 0) | |
4300 | return ret; | |
4301 | ||
4302 | ret = batadv_tt_global_init(bat_priv); | |
4303 | if (ret < 0) | |
4304 | return ret; | |
4305 | ||
4306 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
4307 | batadv_tt_tvlv_unicast_handler_v1, |
4308 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 4309 | |
122edaa0 ML |
4310 | batadv_tvlv_handler_register(bat_priv, NULL, |
4311 | batadv_roam_tvlv_unicast_handler_v1, | |
4312 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
4313 | ||
e1bf0c14 ML |
4314 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
4315 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
4316 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
4317 | ||
4318 | return 1; | |
4319 | } | |
42cb0bef AQ |
4320 | |
4321 | /** | |
4322 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
4323 | * @bat_priv: the bat priv with all the soft interface information | |
4324 | * @addr: the mac address of the client | |
4325 | * @vid: the identifier of the VLAN where this client is connected | |
4326 | * | |
62fe710f | 4327 | * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false |
42cb0bef AQ |
4328 | * otherwise |
4329 | */ | |
4330 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 4331 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
4332 | { |
4333 | struct batadv_tt_global_entry *tt; | |
4334 | bool ret; | |
4335 | ||
4336 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
4337 | if (!tt) | |
4338 | return false; | |
4339 | ||
4340 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
4341 | ||
5dafd8a6 | 4342 | batadv_tt_global_entry_put(tt); |
42cb0bef AQ |
4343 | |
4344 | return ret; | |
4345 | } | |
86452f81 SE |
4346 | |
4347 | /** | |
4348 | * batadv_tt_cache_init - Initialize tt memory object cache | |
4349 | * | |
4350 | * Return: 0 on success or negative error number in case of failure. | |
4351 | */ | |
4352 | int __init batadv_tt_cache_init(void) | |
4353 | { | |
4354 | size_t tl_size = sizeof(struct batadv_tt_local_entry); | |
4355 | size_t tg_size = sizeof(struct batadv_tt_global_entry); | |
4356 | size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry); | |
4357 | size_t tt_change_size = sizeof(struct batadv_tt_change_node); | |
4358 | size_t tt_req_size = sizeof(struct batadv_tt_req_node); | |
4359 | size_t tt_roam_size = sizeof(struct batadv_tt_roam_node); | |
4360 | ||
4361 | batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0, | |
4362 | SLAB_HWCACHE_ALIGN, NULL); | |
4363 | if (!batadv_tl_cache) | |
4364 | return -ENOMEM; | |
4365 | ||
4366 | batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0, | |
4367 | SLAB_HWCACHE_ALIGN, NULL); | |
4368 | if (!batadv_tg_cache) | |
4369 | goto err_tt_tl_destroy; | |
4370 | ||
4371 | batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache", | |
4372 | tt_orig_size, 0, | |
4373 | SLAB_HWCACHE_ALIGN, NULL); | |
4374 | if (!batadv_tt_orig_cache) | |
4375 | goto err_tt_tg_destroy; | |
4376 | ||
4377 | batadv_tt_change_cache = kmem_cache_create("batadv_tt_change_cache", | |
4378 | tt_change_size, 0, | |
4379 | SLAB_HWCACHE_ALIGN, NULL); | |
4380 | if (!batadv_tt_change_cache) | |
4381 | goto err_tt_orig_destroy; | |
4382 | ||
4383 | batadv_tt_req_cache = kmem_cache_create("batadv_tt_req_cache", | |
4384 | tt_req_size, 0, | |
4385 | SLAB_HWCACHE_ALIGN, NULL); | |
4386 | if (!batadv_tt_req_cache) | |
4387 | goto err_tt_change_destroy; | |
4388 | ||
4389 | batadv_tt_roam_cache = kmem_cache_create("batadv_tt_roam_cache", | |
4390 | tt_roam_size, 0, | |
4391 | SLAB_HWCACHE_ALIGN, NULL); | |
4392 | if (!batadv_tt_roam_cache) | |
4393 | goto err_tt_req_destroy; | |
4394 | ||
4395 | return 0; | |
4396 | ||
4397 | err_tt_req_destroy: | |
4398 | kmem_cache_destroy(batadv_tt_req_cache); | |
4399 | batadv_tt_req_cache = NULL; | |
4400 | err_tt_change_destroy: | |
4401 | kmem_cache_destroy(batadv_tt_change_cache); | |
4402 | batadv_tt_change_cache = NULL; | |
4403 | err_tt_orig_destroy: | |
4404 | kmem_cache_destroy(batadv_tt_orig_cache); | |
4405 | batadv_tt_orig_cache = NULL; | |
4406 | err_tt_tg_destroy: | |
4407 | kmem_cache_destroy(batadv_tg_cache); | |
4408 | batadv_tg_cache = NULL; | |
4409 | err_tt_tl_destroy: | |
4410 | kmem_cache_destroy(batadv_tl_cache); | |
4411 | batadv_tl_cache = NULL; | |
4412 | ||
4413 | return -ENOMEM; | |
4414 | } | |
4415 | ||
4416 | /** | |
4417 | * batadv_tt_cache_destroy - Destroy tt memory object cache | |
4418 | */ | |
4419 | void batadv_tt_cache_destroy(void) | |
4420 | { | |
4421 | kmem_cache_destroy(batadv_tl_cache); | |
4422 | kmem_cache_destroy(batadv_tg_cache); | |
4423 | kmem_cache_destroy(batadv_tt_orig_cache); | |
4424 | kmem_cache_destroy(batadv_tt_change_cache); | |
4425 | kmem_cache_destroy(batadv_tt_req_cache); | |
4426 | kmem_cache_destroy(batadv_tt_roam_cache); | |
4427 | } |