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7db7d9f3 | 1 | // SPDX-License-Identifier: GPL-2.0 |
6b1aea8c | 2 | /* Copyright (C) 2007-2018 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> | |
fec149f5 | 55 | #include <uapi/linux/batadv_packet.h> |
d34f0550 | 56 | #include <uapi/linux/batman_adv.h> |
1e2c2a4f SE |
57 | |
58 | #include "bridge_loop_avoidance.h" | |
32ae9b22 | 59 | #include "hard-interface.h" |
c6c8fea2 | 60 | #include "hash.h" |
ba412080 | 61 | #include "log.h" |
d34f0550 | 62 | #include "netlink.h" |
1e2c2a4f | 63 | #include "originator.h" |
1e2c2a4f | 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 | /** |
7e9a8c2c | 91 | * batadv_compare_tt() - check if two TT entries are the same |
d15cd622 AQ |
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 | 109 | /** |
7e9a8c2c | 110 | * batadv_choose_tt() - return the index of the tt entry in the hash table |
c018ad3d AQ |
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 | /** | |
7e9a8c2c | 130 | * batadv_tt_hash_find() - look for a client in the given hash table |
c018ad3d AQ |
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 | 174 | /** |
7e9a8c2c | 175 | * batadv_tt_local_hash_find() - search the local table for a given client |
c018ad3d AQ |
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 | 199 | /** |
7e9a8c2c | 200 | * batadv_tt_global_hash_find() - search the global table for a given client |
c018ad3d AQ |
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 | 224 | /** |
7e9a8c2c | 225 | * batadv_tt_local_entry_free_rcu() - free the tt_local_entry |
86452f81 SE |
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 | 238 | /** |
7e9a8c2c | 239 | * batadv_tt_local_entry_release() - release tt_local_entry from lists and queue |
92dcdf09 SE |
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 | /** | |
7e9a8c2c | 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 | 267 | /** |
7e9a8c2c | 268 | * batadv_tt_global_entry_free_rcu() - free the tt_global_entry |
86452f81 SE |
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 | /** |
7e9a8c2c SE |
282 | * batadv_tt_global_entry_release() - release tt_global_entry from lists and |
283 | * queue for free after rcu grace period | |
92dcdf09 SE |
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 | /** | |
7e9a8c2c | 299 | * batadv_tt_global_entry_put() - decrement the tt_global_entry refcounter and |
5dafd8a6 | 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 | 310 | /** |
7e9a8c2c | 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 | 335 | /** |
7e9a8c2c SE |
336 | * batadv_tt_local_size_mod() - change the size by v of the local table |
337 | * identified by vid | |
7ea7b4a1 AQ |
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 | /** | |
7e9a8c2c SE |
357 | * batadv_tt_local_size_inc() - increase by one the local table size for the |
358 | * given vid | |
7ea7b4a1 AQ |
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 | /** | |
7e9a8c2c SE |
369 | * batadv_tt_local_size_dec() - decrease by one the local table size for the |
370 | * given vid | |
7ea7b4a1 AQ |
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 | /** | |
7e9a8c2c | 381 | * batadv_tt_global_size_mod() - change the size by v of the global table |
d15cd622 AQ |
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 | /** | |
7e9a8c2c | 409 | * batadv_tt_global_size_inc() - increase by one the global table size for the |
7ea7b4a1 AQ |
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 | /** | |
7e9a8c2c | 421 | * batadv_tt_global_size_dec() - decrease by one the global table size for the |
7ea7b4a1 AQ |
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 | 432 | /** |
7e9a8c2c | 433 | * batadv_tt_orig_list_entry_free_rcu() - free the orig_entry |
86452f81 SE |
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 | 445 | /** |
7e9a8c2c | 446 | * batadv_tt_orig_list_entry_release() - release tt orig entry from lists and |
42eff6a6 | 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 | /** |
7e9a8c2c | 462 | * batadv_tt_orig_list_entry_put() - decrement the tt orig entry refcounter and |
7e2366c6 | 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 | 472 | /** |
7e9a8c2c | 473 | * batadv_tt_local_event() - store a local TT event (ADD/DEL) |
3abe4adb AQ |
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 | 547 | /** |
7e9a8c2c | 548 | * batadv_tt_len() - compute length in bytes of given number of tt changes |
335fbe0f ML |
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 | 558 | /** |
7e9a8c2c | 559 | * batadv_tt_entries() - compute the number of entries fitting in tt_len bytes |
298e6e68 AQ |
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 | 569 | /** |
7e9a8c2c SE |
570 | * batadv_tt_local_table_transmit_size() - calculates the local translation |
571 | * table size when transmitted over the air | |
a19d3d85 ML |
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 | 629 | /** |
7e9a8c2c | 630 | * batadv_tt_local_add() - add a new client to the local table or update an |
c018ad3d AQ |
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 | 834 | /** |
7e9a8c2c | 835 | * batadv_tt_prepare_tvlv_global_data() - prepare the TVLV TT header to send |
7ea7b4a1 AQ |
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 | 864 | |
8ba0f9bd | 865 | spin_lock_bh(&orig_node->vlan_list_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: | |
8ba0f9bd | 903 | spin_unlock_bh(&orig_node->vlan_list_lock); |
7ea7b4a1 AQ |
904 | return tvlv_len; |
905 | } | |
906 | ||
907 | /** | |
7e9a8c2c SE |
908 | * batadv_tt_prepare_tvlv_local_data() - allocate and prepare the TT TVLV for |
909 | * this node | |
7ea7b4a1 AQ |
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 | 933 | u16 num_vlan = 0; |
16116dac ML |
934 | u16 vlan_entries = 0; |
935 | u16 total_entries = 0; | |
4f248cff | 936 | u16 tvlv_len; |
6b5e971a | 937 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
938 | int change_offset; |
939 | ||
8ba0f9bd | 940 | spin_lock_bh(&bat_priv->softif_vlan_list_lock); |
7ea7b4a1 | 941 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { |
16116dac ML |
942 | vlan_entries = atomic_read(&vlan->tt.num_entries); |
943 | if (vlan_entries < 1) | |
944 | continue; | |
945 | ||
7ea7b4a1 | 946 | num_vlan++; |
16116dac | 947 | total_entries += vlan_entries; |
7ea7b4a1 AQ |
948 | } |
949 | ||
950 | change_offset = sizeof(**tt_data); | |
951 | change_offset += num_vlan * sizeof(*tt_vlan); | |
952 | ||
953 | /* if tt_len is negative, allocate the space needed by the full table */ | |
954 | if (*tt_len < 0) | |
16116dac | 955 | *tt_len = batadv_tt_len(total_entries); |
7ea7b4a1 AQ |
956 | |
957 | tvlv_len = *tt_len; | |
958 | tvlv_len += change_offset; | |
959 | ||
960 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
961 | if (!*tt_data) { | |
962 | tvlv_len = 0; | |
963 | goto out; | |
964 | } | |
965 | ||
966 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
967 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
968 | (*tt_data)->num_vlan = htons(num_vlan); | |
969 | ||
970 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
971 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
16116dac ML |
972 | vlan_entries = atomic_read(&vlan->tt.num_entries); |
973 | if (vlan_entries < 1) | |
974 | continue; | |
975 | ||
7ea7b4a1 AQ |
976 | tt_vlan->vid = htons(vlan->vid); |
977 | tt_vlan->crc = htonl(vlan->tt.crc); | |
978 | ||
979 | tt_vlan++; | |
980 | } | |
981 | ||
6b5e971a | 982 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
983 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
984 | ||
985 | out: | |
8ba0f9bd | 986 | spin_unlock_bh(&bat_priv->softif_vlan_list_lock); |
7ea7b4a1 AQ |
987 | return tvlv_len; |
988 | } | |
989 | ||
e1bf0c14 | 990 | /** |
7e9a8c2c SE |
991 | * batadv_tt_tvlv_container_update() - update the translation table tvlv |
992 | * container after local tt changes have been committed | |
e1bf0c14 ML |
993 | * @bat_priv: the bat priv with all the soft interface information |
994 | */ | |
995 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 996 | { |
e1bf0c14 ML |
997 | struct batadv_tt_change_node *entry, *safe; |
998 | struct batadv_tvlv_tt_data *tt_data; | |
999 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 1000 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
1001 | int tt_diff_entries_num = 0; |
1002 | int tt_diff_entries_count = 0; | |
6b5e971a | 1003 | u16 tvlv_len; |
be9aa4c1 | 1004 | |
7ea7b4a1 AQ |
1005 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
1006 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
1007 | |
1008 | /* if we have too many changes for one packet don't send any | |
1009 | * and wait for the tt table request which will be fragmented | |
1010 | */ | |
e1bf0c14 ML |
1011 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
1012 | tt_diff_len = 0; | |
be9aa4c1 | 1013 | |
7ea7b4a1 AQ |
1014 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
1015 | &tt_change, &tt_diff_len); | |
1016 | if (!tvlv_len) | |
e1bf0c14 | 1017 | return; |
be9aa4c1 | 1018 | |
e1bf0c14 | 1019 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 1020 | |
e1bf0c14 ML |
1021 | if (tt_diff_len == 0) |
1022 | goto container_register; | |
be9aa4c1 | 1023 | |
807736f6 SE |
1024 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
1025 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 1026 | |
807736f6 | 1027 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 1028 | list) { |
e1bf0c14 ML |
1029 | if (tt_diff_entries_count < tt_diff_entries_num) { |
1030 | memcpy(tt_change + tt_diff_entries_count, | |
1031 | &entry->change, | |
1032 | sizeof(struct batadv_tvlv_tt_change)); | |
1033 | tt_diff_entries_count++; | |
c6c8fea2 | 1034 | } |
a73105b8 | 1035 | list_del(&entry->list); |
86452f81 | 1036 | kmem_cache_free(batadv_tt_change_cache, entry); |
c6c8fea2 | 1037 | } |
807736f6 | 1038 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
1039 | |
1040 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
1041 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
1042 | kfree(bat_priv->tt.last_changeset); | |
1043 | bat_priv->tt.last_changeset_len = 0; | |
1044 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 1045 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 1046 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 1047 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 1048 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
1049 | * instead of providing the diff |
1050 | */ | |
e1bf0c14 | 1051 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 1052 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
1053 | memcpy(bat_priv->tt.last_changeset, |
1054 | tt_change, tt_change_len); | |
1055 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
1056 | } |
1057 | } | |
807736f6 | 1058 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 1059 | |
e1bf0c14 ML |
1060 | container_register: |
1061 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 1062 | tvlv_len); |
e1bf0c14 | 1063 | kfree(tt_data); |
c6c8fea2 SE |
1064 | } |
1065 | ||
dc1cbd14 | 1066 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
ff15c27c SE |
1067 | |
1068 | /** | |
1069 | * batadv_tt_local_seq_print_text() - Print the local tt table in a seq file | |
1070 | * @seq: seq file to print on | |
1071 | * @offset: not used | |
1072 | * | |
1073 | * Return: always 0 | |
1074 | */ | |
08c36d3e | 1075 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1076 | { |
1077 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1078 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1079 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1080 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 1081 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 1082 | struct batadv_hard_iface *primary_if; |
c6c8fea2 | 1083 | struct hlist_head *head; |
6b5e971a | 1084 | u32 i; |
85766a82 AQ |
1085 | int last_seen_secs; |
1086 | int last_seen_msecs; | |
1087 | unsigned long last_seen_jiffies; | |
1088 | bool no_purge; | |
6b5e971a | 1089 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 1090 | |
30da63a6 ML |
1091 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1092 | if (!primary_if) | |
32ae9b22 | 1093 | goto out; |
c6c8fea2 | 1094 | |
86ceb360 | 1095 | seq_printf(seq, |
7ea7b4a1 | 1096 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 1097 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
925a6f37 AQ |
1098 | seq_puts(seq, |
1099 | " Client VID Flags Last seen (CRC )\n"); | |
c6c8fea2 | 1100 | |
c6c8fea2 SE |
1101 | for (i = 0; i < hash->size; i++) { |
1102 | head = &hash->table[i]; | |
1103 | ||
7aadf889 | 1104 | rcu_read_lock(); |
b67bfe0d | 1105 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1106 | head, hash_entry) { |
85766a82 AQ |
1107 | tt_local = container_of(tt_common_entry, |
1108 | struct batadv_tt_local_entry, | |
1109 | common); | |
1110 | last_seen_jiffies = jiffies - tt_local->last_seen; | |
1111 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1112 | last_seen_secs = last_seen_msecs / 1000; | |
1113 | last_seen_msecs = last_seen_msecs % 1000; | |
1114 | ||
1115 | no_purge = tt_common_entry->flags & np_flag; | |
7ea7b4a1 | 1116 | seq_printf(seq, |
dd24ddb2 | 1117 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 1118 | tt_common_entry->addr, |
f7a2bd65 | 1119 | batadv_print_vid(tt_common_entry->vid), |
a2f2b6cd SE |
1120 | ((tt_common_entry->flags & |
1121 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 1122 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
1123 | ((tt_common_entry->flags & |
1124 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
1125 | ((tt_common_entry->flags & | |
1126 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
1127 | ((tt_common_entry->flags & | |
1128 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1129 | ((tt_common_entry->flags & | |
1130 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1131 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 | 1132 | no_purge ? 0 : last_seen_msecs, |
a33d970d | 1133 | tt_local->vlan->tt.crc); |
c6c8fea2 | 1134 | } |
7aadf889 | 1135 | rcu_read_unlock(); |
c6c8fea2 | 1136 | } |
32ae9b22 ML |
1137 | out: |
1138 | if (primary_if) | |
82047ad7 | 1139 | batadv_hardif_put(primary_if); |
30da63a6 | 1140 | return 0; |
c6c8fea2 | 1141 | } |
dc1cbd14 | 1142 | #endif |
c6c8fea2 | 1143 | |
d34f0550 | 1144 | /** |
7e9a8c2c | 1145 | * batadv_tt_local_dump_entry() - Dump one TT local entry into a message |
d34f0550 MS |
1146 | * @msg :Netlink message to dump into |
1147 | * @portid: Port making netlink request | |
1148 | * @seq: Sequence number of netlink message | |
1149 | * @bat_priv: The bat priv with all the soft interface information | |
1150 | * @common: tt local & tt global common data | |
1151 | * | |
1152 | * Return: Error code, or 0 on success | |
1153 | */ | |
1154 | static int | |
1155 | batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
1156 | struct batadv_priv *bat_priv, | |
1157 | struct batadv_tt_common_entry *common) | |
1158 | { | |
1159 | void *hdr; | |
1160 | struct batadv_softif_vlan *vlan; | |
1161 | struct batadv_tt_local_entry *local; | |
1162 | unsigned int last_seen_msecs; | |
1163 | u32 crc; | |
1164 | ||
1165 | local = container_of(common, struct batadv_tt_local_entry, common); | |
1166 | last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen); | |
1167 | ||
1168 | vlan = batadv_softif_vlan_get(bat_priv, common->vid); | |
1169 | if (!vlan) | |
1170 | return 0; | |
1171 | ||
1172 | crc = vlan->tt.crc; | |
1173 | ||
1174 | batadv_softif_vlan_put(vlan); | |
1175 | ||
1176 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
1177 | NLM_F_MULTI, | |
1178 | BATADV_CMD_GET_TRANSTABLE_LOCAL); | |
1179 | if (!hdr) | |
1180 | return -ENOBUFS; | |
1181 | ||
1182 | if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || | |
1183 | nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || | |
1184 | nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || | |
1185 | nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) | |
1186 | goto nla_put_failure; | |
1187 | ||
1188 | if (!(common->flags & BATADV_TT_CLIENT_NOPURGE) && | |
1189 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, last_seen_msecs)) | |
1190 | goto nla_put_failure; | |
1191 | ||
1192 | genlmsg_end(msg, hdr); | |
1193 | return 0; | |
1194 | ||
1195 | nla_put_failure: | |
1196 | genlmsg_cancel(msg, hdr); | |
1197 | return -EMSGSIZE; | |
1198 | } | |
1199 | ||
1200 | /** | |
7e9a8c2c | 1201 | * batadv_tt_local_dump_bucket() - Dump one TT local bucket into a message |
d34f0550 MS |
1202 | * @msg: Netlink message to dump into |
1203 | * @portid: Port making netlink request | |
1204 | * @seq: Sequence number of netlink message | |
1205 | * @bat_priv: The bat priv with all the soft interface information | |
1206 | * @head: Pointer to the list containing the local tt entries | |
1207 | * @idx_s: Number of entries to skip | |
1208 | * | |
1209 | * Return: Error code, or 0 on success | |
1210 | */ | |
1211 | static int | |
1212 | batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
1213 | struct batadv_priv *bat_priv, | |
1214 | struct hlist_head *head, int *idx_s) | |
1215 | { | |
1216 | struct batadv_tt_common_entry *common; | |
1217 | int idx = 0; | |
1218 | ||
1219 | rcu_read_lock(); | |
1220 | hlist_for_each_entry_rcu(common, head, hash_entry) { | |
1221 | if (idx++ < *idx_s) | |
1222 | continue; | |
1223 | ||
1224 | if (batadv_tt_local_dump_entry(msg, portid, seq, bat_priv, | |
1225 | common)) { | |
1226 | rcu_read_unlock(); | |
1227 | *idx_s = idx - 1; | |
1228 | return -EMSGSIZE; | |
1229 | } | |
1230 | } | |
1231 | rcu_read_unlock(); | |
1232 | ||
1233 | *idx_s = 0; | |
1234 | return 0; | |
1235 | } | |
1236 | ||
1237 | /** | |
7e9a8c2c | 1238 | * batadv_tt_local_dump() - Dump TT local entries into a message |
d34f0550 MS |
1239 | * @msg: Netlink message to dump into |
1240 | * @cb: Parameters from query | |
1241 | * | |
1242 | * Return: Error code, or 0 on success | |
1243 | */ | |
1244 | int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
1245 | { | |
1246 | struct net *net = sock_net(cb->skb->sk); | |
1247 | struct net_device *soft_iface; | |
1248 | struct batadv_priv *bat_priv; | |
1249 | struct batadv_hard_iface *primary_if = NULL; | |
1250 | struct batadv_hashtable *hash; | |
1251 | struct hlist_head *head; | |
1252 | int ret; | |
1253 | int ifindex; | |
1254 | int bucket = cb->args[0]; | |
1255 | int idx = cb->args[1]; | |
1256 | int portid = NETLINK_CB(cb->skb).portid; | |
1257 | ||
1258 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
1259 | if (!ifindex) | |
1260 | return -EINVAL; | |
1261 | ||
1262 | soft_iface = dev_get_by_index(net, ifindex); | |
1263 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
1264 | ret = -ENODEV; | |
1265 | goto out; | |
1266 | } | |
1267 | ||
1268 | bat_priv = netdev_priv(soft_iface); | |
1269 | ||
1270 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
1271 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { | |
1272 | ret = -ENOENT; | |
1273 | goto out; | |
1274 | } | |
1275 | ||
1276 | hash = bat_priv->tt.local_hash; | |
1277 | ||
1278 | while (bucket < hash->size) { | |
1279 | head = &hash->table[bucket]; | |
1280 | ||
1281 | if (batadv_tt_local_dump_bucket(msg, portid, cb->nlh->nlmsg_seq, | |
1282 | bat_priv, head, &idx)) | |
1283 | break; | |
1284 | ||
1285 | bucket++; | |
1286 | } | |
1287 | ||
1288 | ret = msg->len; | |
1289 | ||
1290 | out: | |
1291 | if (primary_if) | |
1292 | batadv_hardif_put(primary_if); | |
1293 | if (soft_iface) | |
1294 | dev_put(soft_iface); | |
1295 | ||
1296 | cb->args[0] = bucket; | |
1297 | cb->args[1] = idx; | |
1298 | ||
1299 | return ret; | |
1300 | } | |
1301 | ||
56303d34 SE |
1302 | static void |
1303 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1304 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1305 | u16 flags, const char *message) |
c6c8fea2 | 1306 | { |
3abe4adb | 1307 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1308 | |
015758d0 AQ |
1309 | /* The local client has to be marked as "pending to be removed" but has |
1310 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1311 | * response issued before the net ttvn increment (consistency check) |
1312 | */ | |
acd34afa | 1313 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1314 | |
39c75a51 | 1315 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1316 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1317 | tt_local_entry->common.addr, | |
f7a2bd65 | 1318 | batadv_print_vid(tt_local_entry->common.vid), message); |
c6c8fea2 SE |
1319 | } |
1320 | ||
7f91d06c | 1321 | /** |
7e9a8c2c | 1322 | * batadv_tt_local_remove() - logically remove an entry from the local table |
7f91d06c AQ |
1323 | * @bat_priv: the bat priv with all the soft interface information |
1324 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1325 | * @vid: VLAN identifier |
7f91d06c AQ |
1326 | * @message: message to append to the log on deletion |
1327 | * @roaming: true if the deletion is due to a roaming event | |
1328 | * | |
62fe710f | 1329 | * Return: the flags assigned to the local entry before being deleted |
7f91d06c | 1330 | */ |
6b5e971a SE |
1331 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1332 | unsigned short vid, const char *message, | |
1333 | bool roaming) | |
c6c8fea2 | 1334 | { |
170173bf | 1335 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1336 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
ef72706a | 1337 | void *tt_entry_exists; |
c6c8fea2 | 1338 | |
c018ad3d | 1339 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1340 | if (!tt_local_entry) |
1341 | goto out; | |
1342 | ||
7f91d06c AQ |
1343 | curr_flags = tt_local_entry->common.flags; |
1344 | ||
acd34afa | 1345 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1346 | /* if this global entry addition is due to a roaming, the node has to |
1347 | * mark the local entry as "roamed" in order to correctly reroute | |
1348 | * packets later | |
1349 | */ | |
7c1fd91d | 1350 | if (roaming) { |
acd34afa | 1351 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1352 | /* mark the local client as ROAMed */ |
1353 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1354 | } | |
42d0b044 | 1355 | |
068ee6e2 AQ |
1356 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1357 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1358 | message); | |
1359 | goto out; | |
1360 | } | |
1361 | /* if this client has been added right now, it is possible to | |
1362 | * immediately purge it | |
1363 | */ | |
3abe4adb | 1364 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1365 | |
1366 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1367 | batadv_compare_tt, | |
1368 | batadv_choose_tt, | |
1369 | &tt_local_entry->common); | |
1370 | if (!tt_entry_exists) | |
1371 | goto out; | |
1372 | ||
1373 | /* extra call to free the local tt entry */ | |
95c0db90 | 1374 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c | 1375 | |
7683fdc1 AQ |
1376 | out: |
1377 | if (tt_local_entry) | |
95c0db90 | 1378 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c AQ |
1379 | |
1380 | return curr_flags; | |
c6c8fea2 SE |
1381 | } |
1382 | ||
a19d3d85 | 1383 | /** |
7e9a8c2c | 1384 | * batadv_tt_local_purge_list() - purge inactive tt local entries |
a19d3d85 ML |
1385 | * @bat_priv: the bat priv with all the soft interface information |
1386 | * @head: pointer to the list containing the local tt entries | |
1387 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1388 | * inactive or not | |
1389 | */ | |
56303d34 | 1390 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1391 | struct hlist_head *head, |
1392 | int timeout) | |
c6c8fea2 | 1393 | { |
56303d34 SE |
1394 | struct batadv_tt_local_entry *tt_local_entry; |
1395 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1396 | struct hlist_node *node_tmp; |
acd34afa | 1397 | |
b67bfe0d | 1398 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1399 | hash_entry) { |
1400 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1401 | struct batadv_tt_local_entry, |
1402 | common); | |
acd34afa SE |
1403 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1404 | continue; | |
1405 | ||
1406 | /* entry already marked for deletion */ | |
1407 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1408 | continue; | |
1409 | ||
a19d3d85 | 1410 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1411 | continue; |
1412 | ||
1413 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1414 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1415 | } | |
1416 | } | |
1417 | ||
a19d3d85 | 1418 | /** |
7e9a8c2c | 1419 | * batadv_tt_local_purge() - purge inactive tt local entries |
a19d3d85 ML |
1420 | * @bat_priv: the bat priv with all the soft interface information |
1421 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1422 | * inactive or not | |
1423 | */ | |
1424 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1425 | int timeout) | |
acd34afa | 1426 | { |
807736f6 | 1427 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1428 | struct hlist_head *head; |
7683fdc1 | 1429 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1430 | u32 i; |
c6c8fea2 | 1431 | |
c6c8fea2 SE |
1432 | for (i = 0; i < hash->size; i++) { |
1433 | head = &hash->table[i]; | |
7683fdc1 | 1434 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1435 | |
7683fdc1 | 1436 | spin_lock_bh(list_lock); |
a19d3d85 | 1437 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1438 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1439 | } |
c6c8fea2 SE |
1440 | } |
1441 | ||
56303d34 | 1442 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1443 | { |
5bf74e9c | 1444 | struct batadv_hashtable *hash; |
a73105b8 | 1445 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1446 | struct batadv_tt_common_entry *tt_common_entry; |
1447 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 1448 | struct hlist_node *node_tmp; |
7683fdc1 | 1449 | struct hlist_head *head; |
6b5e971a | 1450 | u32 i; |
a73105b8 | 1451 | |
807736f6 | 1452 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1453 | return; |
1454 | ||
807736f6 | 1455 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1456 | |
1457 | for (i = 0; i < hash->size; i++) { | |
1458 | head = &hash->table[i]; | |
1459 | list_lock = &hash->list_locks[i]; | |
1460 | ||
1461 | spin_lock_bh(list_lock); | |
b67bfe0d | 1462 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1463 | head, hash_entry) { |
b67bfe0d | 1464 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1465 | tt_local = container_of(tt_common_entry, |
1466 | struct batadv_tt_local_entry, | |
1467 | common); | |
35df3b29 | 1468 | |
95c0db90 | 1469 | batadv_tt_local_entry_put(tt_local); |
a73105b8 AQ |
1470 | } |
1471 | spin_unlock_bh(list_lock); | |
1472 | } | |
1473 | ||
1a8eaf07 | 1474 | batadv_hash_destroy(hash); |
a73105b8 | 1475 | |
807736f6 | 1476 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1477 | } |
1478 | ||
56303d34 | 1479 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1480 | { |
807736f6 | 1481 | if (bat_priv->tt.global_hash) |
5346c35e | 1482 | return 0; |
c6c8fea2 | 1483 | |
807736f6 | 1484 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1485 | |
807736f6 | 1486 | if (!bat_priv->tt.global_hash) |
5346c35e | 1487 | return -ENOMEM; |
c6c8fea2 | 1488 | |
dec05074 AQ |
1489 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1490 | &batadv_tt_global_hash_lock_class_key); | |
1491 | ||
5346c35e | 1492 | return 0; |
c6c8fea2 SE |
1493 | } |
1494 | ||
56303d34 | 1495 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1496 | { |
56303d34 | 1497 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1498 | |
807736f6 | 1499 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1500 | |
807736f6 | 1501 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1502 | list) { |
1503 | list_del(&entry->list); | |
86452f81 | 1504 | kmem_cache_free(batadv_tt_change_cache, entry); |
a73105b8 | 1505 | } |
c6c8fea2 | 1506 | |
807736f6 SE |
1507 | atomic_set(&bat_priv->tt.local_changes, 0); |
1508 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1509 | } |
c6c8fea2 | 1510 | |
62fe710f | 1511 | /** |
7e9a8c2c | 1512 | * batadv_tt_global_orig_entry_find() - find a TT orig_list_entry |
d15cd622 AQ |
1513 | * @entry: the TT global entry where the orig_list_entry has to be |
1514 | * extracted from | |
1515 | * @orig_node: the originator for which the orig_list_entry has to be found | |
62fe710f | 1516 | * |
d15cd622 | 1517 | * retrieve the orig_tt_list_entry belonging to orig_node from the |
d657e621 AQ |
1518 | * batadv_tt_global_entry list |
1519 | * | |
62fe710f | 1520 | * Return: it with an increased refcounter, NULL if not found |
db08e6e5 | 1521 | */ |
d657e621 AQ |
1522 | static struct batadv_tt_orig_list_entry * |
1523 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1524 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1525 | { |
d657e621 | 1526 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1527 | const struct hlist_head *head; |
db08e6e5 SW |
1528 | |
1529 | rcu_read_lock(); | |
1530 | head = &entry->orig_list; | |
b67bfe0d | 1531 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1532 | if (tmp_orig_entry->orig_node != orig_node) |
1533 | continue; | |
6e8ef69d | 1534 | if (!kref_get_unless_zero(&tmp_orig_entry->refcount)) |
d657e621 AQ |
1535 | continue; |
1536 | ||
1537 | orig_entry = tmp_orig_entry; | |
1538 | break; | |
db08e6e5 SW |
1539 | } |
1540 | rcu_read_unlock(); | |
d657e621 AQ |
1541 | |
1542 | return orig_entry; | |
1543 | } | |
1544 | ||
62fe710f | 1545 | /** |
7e9a8c2c SE |
1546 | * batadv_tt_global_entry_has_orig() - check if a TT global entry is also |
1547 | * handled by a given originator | |
d15cd622 AQ |
1548 | * @entry: the TT global entry to check |
1549 | * @orig_node: the originator to search in the list | |
7072337e LL |
1550 | * @flags: a pointer to store TT flags for the given @entry received |
1551 | * from @orig_node | |
62fe710f SE |
1552 | * |
1553 | * find out if an orig_node is already in the list of a tt_global_entry. | |
1554 | * | |
1555 | * Return: true if found, false otherwise | |
d657e621 AQ |
1556 | */ |
1557 | static bool | |
1558 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
7072337e LL |
1559 | const struct batadv_orig_node *orig_node, |
1560 | u8 *flags) | |
d657e621 AQ |
1561 | { |
1562 | struct batadv_tt_orig_list_entry *orig_entry; | |
1563 | bool found = false; | |
1564 | ||
1565 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1566 | if (orig_entry) { | |
1567 | found = true; | |
7072337e LL |
1568 | |
1569 | if (flags) | |
1570 | *flags = orig_entry->flags; | |
1571 | ||
7e2366c6 | 1572 | batadv_tt_orig_list_entry_put(orig_entry); |
d657e621 AQ |
1573 | } |
1574 | ||
db08e6e5 SW |
1575 | return found; |
1576 | } | |
1577 | ||
54e22f26 | 1578 | /** |
7e9a8c2c | 1579 | * batadv_tt_global_sync_flags() - update TT sync flags |
54e22f26 LL |
1580 | * @tt_global: the TT global entry to update sync flags in |
1581 | * | |
1582 | * Updates the sync flag bits in the tt_global flag attribute with a logical | |
1583 | * OR of all sync flags from any of its TT orig entries. | |
1584 | */ | |
1585 | static void | |
1586 | batadv_tt_global_sync_flags(struct batadv_tt_global_entry *tt_global) | |
1587 | { | |
1588 | struct batadv_tt_orig_list_entry *orig_entry; | |
1589 | const struct hlist_head *head; | |
1590 | u16 flags = BATADV_NO_FLAGS; | |
1591 | ||
1592 | rcu_read_lock(); | |
1593 | head = &tt_global->orig_list; | |
1594 | hlist_for_each_entry_rcu(orig_entry, head, list) | |
1595 | flags |= orig_entry->flags; | |
1596 | rcu_read_unlock(); | |
1597 | ||
1598 | flags |= tt_global->common.flags & (~BATADV_TT_SYNC_MASK); | |
1599 | tt_global->common.flags = flags; | |
1600 | } | |
1601 | ||
1602 | /** | |
7e9a8c2c | 1603 | * batadv_tt_global_orig_entry_add() - add or update a TT orig entry |
54e22f26 LL |
1604 | * @tt_global: the TT global entry to add an orig entry in |
1605 | * @orig_node: the originator to add an orig entry for | |
1606 | * @ttvn: translation table version number of this changeset | |
1607 | * @flags: TT sync flags | |
1608 | */ | |
a513088d | 1609 | static void |
d657e621 | 1610 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
54e22f26 LL |
1611 | struct batadv_orig_node *orig_node, int ttvn, |
1612 | u8 flags) | |
db08e6e5 | 1613 | { |
56303d34 | 1614 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1615 | |
d657e621 | 1616 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1617 | if (orig_entry) { |
1618 | /* refresh the ttvn: the current value could be a bogus one that | |
1619 | * was added during a "temporary client detection" | |
1620 | */ | |
1621 | orig_entry->ttvn = ttvn; | |
54e22f26 LL |
1622 | orig_entry->flags = flags; |
1623 | goto sync_flags; | |
30cfd02b | 1624 | } |
d657e621 | 1625 | |
86452f81 | 1626 | orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC); |
db08e6e5 | 1627 | if (!orig_entry) |
d657e621 | 1628 | goto out; |
db08e6e5 SW |
1629 | |
1630 | INIT_HLIST_NODE(&orig_entry->list); | |
7c124391 | 1631 | kref_get(&orig_node->refcount); |
7ea7b4a1 | 1632 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1633 | orig_entry->orig_node = orig_node; |
1634 | orig_entry->ttvn = ttvn; | |
54e22f26 | 1635 | orig_entry->flags = flags; |
6e8ef69d | 1636 | kref_init(&orig_entry->refcount); |
db08e6e5 | 1637 | |
d657e621 | 1638 | spin_lock_bh(&tt_global->list_lock); |
23f55485 | 1639 | kref_get(&orig_entry->refcount); |
db08e6e5 | 1640 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1641 | &tt_global->orig_list); |
1642 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1643 | atomic_inc(&tt_global->orig_list_count); |
1644 | ||
54e22f26 LL |
1645 | sync_flags: |
1646 | batadv_tt_global_sync_flags(tt_global); | |
d657e621 AQ |
1647 | out: |
1648 | if (orig_entry) | |
7e2366c6 | 1649 | batadv_tt_orig_list_entry_put(orig_entry); |
db08e6e5 SW |
1650 | } |
1651 | ||
d4ff40f6 | 1652 | /** |
7e9a8c2c | 1653 | * batadv_tt_global_add() - add a new TT global entry or update an existing one |
d4ff40f6 AQ |
1654 | * @bat_priv: the bat priv with all the soft interface information |
1655 | * @orig_node: the originator announcing the client | |
1656 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1657 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1658 | * @flags: TT flags that have to be set for this non-mesh client |
1659 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1660 | * | |
1661 | * Add a new TT global entry for the given originator. If the entry already | |
1662 | * exists add a new reference to the given originator (a global entry can have | |
1663 | * references to multiple originators) and adjust the flags attribute to reflect | |
1664 | * the function argument. | |
1665 | * If a TT local entry exists for this non-mesh client remove it. | |
1666 | * | |
1667 | * The caller must hold orig_node refcount. | |
1e5d49fc | 1668 | * |
62fe710f | 1669 | * Return: true if the new entry has been added, false otherwise |
d4ff40f6 | 1670 | */ |
1e5d49fc AQ |
1671 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1672 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1673 | const unsigned char *tt_addr, |
6b5e971a | 1674 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1675 | { |
170173bf SE |
1676 | struct batadv_tt_global_entry *tt_global_entry; |
1677 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1678 | bool ret = false; |
80b3f58c | 1679 | int hash_added; |
56303d34 | 1680 | struct batadv_tt_common_entry *common; |
6b5e971a | 1681 | u16 local_flags; |
c6c8fea2 | 1682 | |
cfd4f757 AQ |
1683 | /* ignore global entries from backbone nodes */ |
1684 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1685 | return true; | |
1686 | ||
c018ad3d AQ |
1687 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1688 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1689 | |
1690 | /* if the node already has a local client for this entry, it has to wait | |
1691 | * for a roaming advertisement instead of manually messing up the global | |
1692 | * table | |
1693 | */ | |
1694 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1695 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1696 | goto out; | |
a73105b8 AQ |
1697 | |
1698 | if (!tt_global_entry) { | |
86452f81 SE |
1699 | tt_global_entry = kmem_cache_zalloc(batadv_tg_cache, |
1700 | GFP_ATOMIC); | |
a73105b8 | 1701 | if (!tt_global_entry) |
7683fdc1 AQ |
1702 | goto out; |
1703 | ||
c0a55929 | 1704 | common = &tt_global_entry->common; |
8fdd0153 | 1705 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1706 | common->vid = vid; |
db08e6e5 | 1707 | |
d4f44692 | 1708 | common->flags = flags; |
cc47f66e | 1709 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1710 | /* node must store current time in case of roaming. This is |
1711 | * needed to purge this entry out on timeout (if nobody claims | |
1712 | * it) | |
1713 | */ | |
1714 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1715 | tt_global_entry->roam_at = jiffies; | |
92dcdf09 | 1716 | kref_init(&common->refcount); |
30cfd02b | 1717 | common->added_at = jiffies; |
db08e6e5 SW |
1718 | |
1719 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1720 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1721 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1722 | |
15d5ffde | 1723 | kref_get(&common->refcount); |
807736f6 | 1724 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1725 | batadv_compare_tt, |
c018ad3d | 1726 | batadv_choose_tt, common, |
a513088d | 1727 | &common->hash_entry); |
80b3f58c SW |
1728 | |
1729 | if (unlikely(hash_added != 0)) { | |
1730 | /* remove the reference for the hash */ | |
5dafd8a6 | 1731 | batadv_tt_global_entry_put(tt_global_entry); |
80b3f58c SW |
1732 | goto out_remove; |
1733 | } | |
a73105b8 | 1734 | } else { |
068ee6e2 | 1735 | common = &tt_global_entry->common; |
30cfd02b AQ |
1736 | /* If there is already a global entry, we can use this one for |
1737 | * our processing. | |
068ee6e2 AQ |
1738 | * But if we are trying to add a temporary client then here are |
1739 | * two options at this point: | |
1740 | * 1) the global client is not a temporary client: the global | |
1741 | * client has to be left as it is, temporary information | |
1742 | * should never override any already known client state | |
1743 | * 2) the global client is a temporary client: purge the | |
1744 | * originator list and add the new one orig_entry | |
30cfd02b | 1745 | */ |
068ee6e2 AQ |
1746 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1747 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1748 | goto out; | |
1749 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
7072337e | 1750 | orig_node, NULL)) |
068ee6e2 AQ |
1751 | goto out_remove; |
1752 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1753 | goto add_orig_entry; | |
1754 | } | |
30cfd02b AQ |
1755 | |
1756 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1757 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1758 | * remove the previous temporary orig node and re-add it | |
1759 | * if required. If the orig entry changed, the new one which | |
1760 | * is a non-temporary entry is preferred. | |
30cfd02b | 1761 | */ |
a6cb3909 SW |
1762 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1763 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1764 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1765 | } | |
db08e6e5 | 1766 | |
e9c00136 | 1767 | /* the change can carry possible "attribute" flags like the |
54e22f26 | 1768 | * TT_CLIENT_TEMP, therefore they have to be copied in the |
e9c00136 AQ |
1769 | * client entry |
1770 | */ | |
54e22f26 | 1771 | common->flags |= flags & (~BATADV_TT_SYNC_MASK); |
e9c00136 | 1772 | |
acd34afa SE |
1773 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1774 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1775 | * delete + roaming change for this originator. |
1776 | * | |
1777 | * We should first delete the old originator before adding the | |
1778 | * new one. | |
1779 | */ | |
068ee6e2 | 1780 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1781 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1782 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1783 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1784 | } |
1785 | } | |
068ee6e2 | 1786 | add_orig_entry: |
30cfd02b | 1787 | /* add the new orig_entry (if needed) or update it */ |
54e22f26 LL |
1788 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn, |
1789 | flags & BATADV_TT_SYNC_MASK); | |
c6c8fea2 | 1790 | |
39c75a51 | 1791 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1792 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
f7a2bd65 | 1793 | common->addr, batadv_print_vid(common->vid), |
16052789 | 1794 | orig_node->orig); |
1e5d49fc | 1795 | ret = true; |
c6c8fea2 | 1796 | |
80b3f58c | 1797 | out_remove: |
c5caf4ef LL |
1798 | /* Do not remove multicast addresses from the local hash on |
1799 | * global additions | |
1800 | */ | |
1801 | if (is_multicast_ether_addr(tt_addr)) | |
1802 | goto out; | |
7f91d06c | 1803 | |
a73105b8 | 1804 | /* remove address from local hash if present */ |
c018ad3d | 1805 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1806 | "global tt received", |
c1d07431 | 1807 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1808 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1809 | ||
068ee6e2 AQ |
1810 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1811 | /* this is a normal global add. Therefore the client is not in a | |
1812 | * roaming state anymore. | |
1813 | */ | |
1814 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1815 | ||
7683fdc1 AQ |
1816 | out: |
1817 | if (tt_global_entry) | |
5dafd8a6 | 1818 | batadv_tt_global_entry_put(tt_global_entry); |
068ee6e2 | 1819 | if (tt_local_entry) |
95c0db90 | 1820 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 1821 | return ret; |
c6c8fea2 SE |
1822 | } |
1823 | ||
1b371d13 | 1824 | /** |
7e9a8c2c | 1825 | * batadv_transtable_best_orig() - Get best originator list entry from tt entry |
4627456a | 1826 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1827 | * @tt_global_entry: global translation table entry to be analyzed |
1828 | * | |
1829 | * This functon assumes the caller holds rcu_read_lock(). | |
62fe710f | 1830 | * Return: best originator list entry or NULL on errors. |
981d8900 SE |
1831 | */ |
1832 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1833 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1834 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1835 | { |
4627456a | 1836 | struct batadv_neigh_node *router, *best_router = NULL; |
29824a55 | 1837 | struct batadv_algo_ops *bao = bat_priv->algo_ops; |
981d8900 | 1838 | struct hlist_head *head; |
981d8900 | 1839 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1840 | |
1841 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1842 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1843 | router = batadv_orig_router_get(orig_entry->orig_node, |
1844 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1845 | if (!router) |
1846 | continue; | |
1847 | ||
4627456a | 1848 | if (best_router && |
29824a55 AQ |
1849 | bao->neigh.cmp(router, BATADV_IF_DEFAULT, best_router, |
1850 | BATADV_IF_DEFAULT) <= 0) { | |
25bb2509 | 1851 | batadv_neigh_node_put(router); |
4627456a | 1852 | continue; |
981d8900 SE |
1853 | } |
1854 | ||
4627456a AQ |
1855 | /* release the refcount for the "old" best */ |
1856 | if (best_router) | |
25bb2509 | 1857 | batadv_neigh_node_put(best_router); |
4627456a AQ |
1858 | |
1859 | best_entry = orig_entry; | |
1860 | best_router = router; | |
981d8900 SE |
1861 | } |
1862 | ||
4627456a | 1863 | if (best_router) |
25bb2509 | 1864 | batadv_neigh_node_put(best_router); |
4627456a | 1865 | |
981d8900 SE |
1866 | return best_entry; |
1867 | } | |
1868 | ||
dc1cbd14 | 1869 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
1b371d13 | 1870 | /** |
7e9a8c2c SE |
1871 | * batadv_tt_global_print_entry() - print all orig nodes who announce the |
1872 | * address for this global entry | |
4627456a | 1873 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1874 | * @tt_global_entry: global translation table entry to be printed |
1875 | * @seq: debugfs table seq_file struct | |
1876 | * | |
1877 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1878 | */ |
a513088d | 1879 | static void |
4627456a AQ |
1880 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1881 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1882 | struct seq_file *seq) |
db08e6e5 | 1883 | { |
981d8900 | 1884 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1885 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1886 | struct batadv_orig_node_vlan *vlan; |
1887 | struct hlist_head *head; | |
6b5e971a SE |
1888 | u8 last_ttvn; |
1889 | u16 flags; | |
db08e6e5 SW |
1890 | |
1891 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1892 | flags = tt_common_entry->flags; |
1893 | ||
4627456a | 1894 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1895 | if (best_entry) { |
7ea7b4a1 AQ |
1896 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1897 | tt_common_entry->vid); | |
1898 | if (!vlan) { | |
1899 | seq_printf(seq, | |
1900 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
f7a2bd65 | 1901 | batadv_print_vid(tt_common_entry->vid), |
7ea7b4a1 AQ |
1902 | best_entry->orig_node->orig); |
1903 | goto print_list; | |
1904 | } | |
1905 | ||
981d8900 | 1906 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1907 | seq_printf(seq, |
dd24ddb2 | 1908 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1909 | '*', tt_global_entry->common.addr, |
f7a2bd65 | 1910 | batadv_print_vid(tt_global_entry->common.vid), |
981d8900 | 1911 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1912 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1913 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1914 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1915 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1916 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 | 1917 | |
21754e25 | 1918 | batadv_orig_node_vlan_put(vlan); |
981d8900 | 1919 | } |
db08e6e5 | 1920 | |
7ea7b4a1 | 1921 | print_list: |
db08e6e5 SW |
1922 | head = &tt_global_entry->orig_list; |
1923 | ||
b67bfe0d | 1924 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1925 | if (best_entry == orig_entry) |
1926 | continue; | |
1927 | ||
7ea7b4a1 AQ |
1928 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1929 | tt_common_entry->vid); | |
1930 | if (!vlan) { | |
1931 | seq_printf(seq, | |
1932 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
f7a2bd65 | 1933 | batadv_print_vid(tt_common_entry->vid), |
7ea7b4a1 AQ |
1934 | orig_entry->orig_node->orig); |
1935 | continue; | |
1936 | } | |
1937 | ||
db08e6e5 | 1938 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1939 | seq_printf(seq, |
dd24ddb2 | 1940 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1941 | '+', tt_global_entry->common.addr, |
f7a2bd65 | 1942 | batadv_print_vid(tt_global_entry->common.vid), |
981d8900 | 1943 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1944 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1945 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1946 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1947 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1948 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 | 1949 | |
21754e25 | 1950 | batadv_orig_node_vlan_put(vlan); |
db08e6e5 SW |
1951 | } |
1952 | } | |
1953 | ||
ff15c27c SE |
1954 | /** |
1955 | * batadv_tt_global_seq_print_text() - Print the global tt table in a seq file | |
1956 | * @seq: seq file to print on | |
1957 | * @offset: not used | |
1958 | * | |
1959 | * Return: always 0 | |
1960 | */ | |
08c36d3e | 1961 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1962 | { |
1963 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1964 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1965 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1966 | struct batadv_tt_common_entry *tt_common_entry; |
1967 | struct batadv_tt_global_entry *tt_global; | |
1968 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1969 | struct hlist_head *head; |
6b5e971a | 1970 | u32 i; |
c6c8fea2 | 1971 | |
30da63a6 ML |
1972 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1973 | if (!primary_if) | |
32ae9b22 | 1974 | goto out; |
c6c8fea2 | 1975 | |
2dafb49d AQ |
1976 | seq_printf(seq, |
1977 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1978 | net_dev->name); |
925a6f37 AQ |
1979 | seq_puts(seq, |
1980 | " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n"); | |
c6c8fea2 | 1981 | |
c6c8fea2 SE |
1982 | for (i = 0; i < hash->size; i++) { |
1983 | head = &hash->table[i]; | |
1984 | ||
7aadf889 | 1985 | rcu_read_lock(); |
b67bfe0d | 1986 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1987 | head, hash_entry) { |
56303d34 SE |
1988 | tt_global = container_of(tt_common_entry, |
1989 | struct batadv_tt_global_entry, | |
1990 | common); | |
4627456a | 1991 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1992 | } |
7aadf889 | 1993 | rcu_read_unlock(); |
c6c8fea2 | 1994 | } |
32ae9b22 ML |
1995 | out: |
1996 | if (primary_if) | |
82047ad7 | 1997 | batadv_hardif_put(primary_if); |
30da63a6 | 1998 | return 0; |
c6c8fea2 | 1999 | } |
dc1cbd14 | 2000 | #endif |
c6c8fea2 | 2001 | |
d34f0550 | 2002 | /** |
7e9a8c2c | 2003 | * batadv_tt_global_dump_subentry() - Dump all TT local entries into a message |
d34f0550 MS |
2004 | * @msg: Netlink message to dump into |
2005 | * @portid: Port making netlink request | |
2006 | * @seq: Sequence number of netlink message | |
2007 | * @common: tt local & tt global common data | |
2008 | * @orig: Originator node announcing a non-mesh client | |
2009 | * @best: Is the best originator for the TT entry | |
2010 | * | |
2011 | * Return: Error code, or 0 on success | |
2012 | */ | |
2013 | static int | |
2014 | batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, | |
2015 | struct batadv_tt_common_entry *common, | |
2016 | struct batadv_tt_orig_list_entry *orig, | |
2017 | bool best) | |
2018 | { | |
54e22f26 | 2019 | u16 flags = (common->flags & (~BATADV_TT_SYNC_MASK)) | orig->flags; |
d34f0550 MS |
2020 | void *hdr; |
2021 | struct batadv_orig_node_vlan *vlan; | |
2022 | u8 last_ttvn; | |
2023 | u32 crc; | |
2024 | ||
2025 | vlan = batadv_orig_node_vlan_get(orig->orig_node, | |
2026 | common->vid); | |
2027 | if (!vlan) | |
2028 | return 0; | |
2029 | ||
2030 | crc = vlan->tt.crc; | |
2031 | ||
2032 | batadv_orig_node_vlan_put(vlan); | |
2033 | ||
2034 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
2035 | NLM_F_MULTI, | |
2036 | BATADV_CMD_GET_TRANSTABLE_GLOBAL); | |
2037 | if (!hdr) | |
2038 | return -ENOBUFS; | |
2039 | ||
2040 | last_ttvn = atomic_read(&orig->orig_node->last_ttvn); | |
2041 | ||
2042 | if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || | |
2043 | nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
2044 | orig->orig_node->orig) || | |
2045 | nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) || | |
2046 | nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) || | |
2047 | nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || | |
2048 | nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || | |
54e22f26 | 2049 | nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, flags)) |
d34f0550 MS |
2050 | goto nla_put_failure; |
2051 | ||
2052 | if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) | |
2053 | goto nla_put_failure; | |
2054 | ||
2055 | genlmsg_end(msg, hdr); | |
2056 | return 0; | |
2057 | ||
2058 | nla_put_failure: | |
2059 | genlmsg_cancel(msg, hdr); | |
2060 | return -EMSGSIZE; | |
2061 | } | |
2062 | ||
2063 | /** | |
7e9a8c2c | 2064 | * batadv_tt_global_dump_entry() - Dump one TT global entry into a message |
d34f0550 MS |
2065 | * @msg: Netlink message to dump into |
2066 | * @portid: Port making netlink request | |
2067 | * @seq: Sequence number of netlink message | |
2068 | * @bat_priv: The bat priv with all the soft interface information | |
2069 | * @common: tt local & tt global common data | |
2070 | * @sub_s: Number of entries to skip | |
2071 | * | |
2072 | * This function assumes the caller holds rcu_read_lock(). | |
2073 | * | |
2074 | * Return: Error code, or 0 on success | |
2075 | */ | |
2076 | static int | |
2077 | batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
2078 | struct batadv_priv *bat_priv, | |
2079 | struct batadv_tt_common_entry *common, int *sub_s) | |
2080 | { | |
2081 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; | |
2082 | struct batadv_tt_global_entry *global; | |
2083 | struct hlist_head *head; | |
2084 | int sub = 0; | |
2085 | bool best; | |
2086 | ||
2087 | global = container_of(common, struct batadv_tt_global_entry, common); | |
2088 | best_entry = batadv_transtable_best_orig(bat_priv, global); | |
2089 | head = &global->orig_list; | |
2090 | ||
2091 | hlist_for_each_entry_rcu(orig_entry, head, list) { | |
2092 | if (sub++ < *sub_s) | |
2093 | continue; | |
2094 | ||
2095 | best = (orig_entry == best_entry); | |
2096 | ||
2097 | if (batadv_tt_global_dump_subentry(msg, portid, seq, common, | |
2098 | orig_entry, best)) { | |
2099 | *sub_s = sub - 1; | |
2100 | return -EMSGSIZE; | |
2101 | } | |
2102 | } | |
2103 | ||
2104 | *sub_s = 0; | |
2105 | return 0; | |
2106 | } | |
2107 | ||
2108 | /** | |
7e9a8c2c | 2109 | * batadv_tt_global_dump_bucket() - Dump one TT local bucket into a message |
d34f0550 MS |
2110 | * @msg: Netlink message to dump into |
2111 | * @portid: Port making netlink request | |
2112 | * @seq: Sequence number of netlink message | |
2113 | * @bat_priv: The bat priv with all the soft interface information | |
2114 | * @head: Pointer to the list containing the global tt entries | |
2115 | * @idx_s: Number of entries to skip | |
2116 | * @sub: Number of entries to skip | |
2117 | * | |
2118 | * Return: Error code, or 0 on success | |
2119 | */ | |
2120 | static int | |
2121 | batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
2122 | struct batadv_priv *bat_priv, | |
2123 | struct hlist_head *head, int *idx_s, int *sub) | |
2124 | { | |
2125 | struct batadv_tt_common_entry *common; | |
2126 | int idx = 0; | |
2127 | ||
2128 | rcu_read_lock(); | |
2129 | hlist_for_each_entry_rcu(common, head, hash_entry) { | |
2130 | if (idx++ < *idx_s) | |
2131 | continue; | |
2132 | ||
2133 | if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv, | |
2134 | common, sub)) { | |
2135 | rcu_read_unlock(); | |
2136 | *idx_s = idx - 1; | |
2137 | return -EMSGSIZE; | |
2138 | } | |
2139 | } | |
2140 | rcu_read_unlock(); | |
2141 | ||
2142 | *idx_s = 0; | |
2143 | *sub = 0; | |
2144 | return 0; | |
2145 | } | |
2146 | ||
2147 | /** | |
7e9a8c2c | 2148 | * batadv_tt_global_dump() - Dump TT global entries into a message |
d34f0550 MS |
2149 | * @msg: Netlink message to dump into |
2150 | * @cb: Parameters from query | |
2151 | * | |
2152 | * Return: Error code, or length of message on success | |
2153 | */ | |
2154 | int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
2155 | { | |
2156 | struct net *net = sock_net(cb->skb->sk); | |
2157 | struct net_device *soft_iface; | |
2158 | struct batadv_priv *bat_priv; | |
2159 | struct batadv_hard_iface *primary_if = NULL; | |
2160 | struct batadv_hashtable *hash; | |
2161 | struct hlist_head *head; | |
2162 | int ret; | |
2163 | int ifindex; | |
2164 | int bucket = cb->args[0]; | |
2165 | int idx = cb->args[1]; | |
2166 | int sub = cb->args[2]; | |
2167 | int portid = NETLINK_CB(cb->skb).portid; | |
2168 | ||
2169 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
2170 | if (!ifindex) | |
2171 | return -EINVAL; | |
2172 | ||
2173 | soft_iface = dev_get_by_index(net, ifindex); | |
2174 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
2175 | ret = -ENODEV; | |
2176 | goto out; | |
2177 | } | |
2178 | ||
2179 | bat_priv = netdev_priv(soft_iface); | |
2180 | ||
2181 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2182 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { | |
2183 | ret = -ENOENT; | |
2184 | goto out; | |
2185 | } | |
2186 | ||
2187 | hash = bat_priv->tt.global_hash; | |
2188 | ||
2189 | while (bucket < hash->size) { | |
2190 | head = &hash->table[bucket]; | |
2191 | ||
2192 | if (batadv_tt_global_dump_bucket(msg, portid, | |
2193 | cb->nlh->nlmsg_seq, bat_priv, | |
2194 | head, &idx, &sub)) | |
2195 | break; | |
2196 | ||
2197 | bucket++; | |
2198 | } | |
2199 | ||
2200 | ret = msg->len; | |
2201 | ||
2202 | out: | |
2203 | if (primary_if) | |
2204 | batadv_hardif_put(primary_if); | |
2205 | if (soft_iface) | |
2206 | dev_put(soft_iface); | |
2207 | ||
2208 | cb->args[0] = bucket; | |
2209 | cb->args[1] = idx; | |
2210 | cb->args[2] = sub; | |
2211 | ||
2212 | return ret; | |
2213 | } | |
2214 | ||
1d8ab8d3 | 2215 | /** |
7e9a8c2c | 2216 | * _batadv_tt_global_del_orig_entry() - remove and free an orig_entry |
1d8ab8d3 LL |
2217 | * @tt_global_entry: the global entry to remove the orig_entry from |
2218 | * @orig_entry: the orig entry to remove and free | |
2219 | * | |
2220 | * Remove an orig_entry from its list in the given tt_global_entry and | |
2221 | * free this orig_entry afterwards. | |
433ff98f ML |
2222 | * |
2223 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
2224 | * part of a list. | |
1d8ab8d3 LL |
2225 | */ |
2226 | static void | |
433ff98f ML |
2227 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
2228 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 2229 | { |
2c72d655 SE |
2230 | lockdep_assert_held(&tt_global_entry->list_lock); |
2231 | ||
1d8ab8d3 LL |
2232 | batadv_tt_global_size_dec(orig_entry->orig_node, |
2233 | tt_global_entry->common.vid); | |
2234 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
2235 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
2236 | * being part of a list | |
2237 | */ | |
1d8ab8d3 | 2238 | hlist_del_rcu(&orig_entry->list); |
7e2366c6 | 2239 | batadv_tt_orig_list_entry_put(orig_entry); |
1d8ab8d3 LL |
2240 | } |
2241 | ||
db08e6e5 | 2242 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 2243 | static void |
56303d34 | 2244 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 2245 | { |
db08e6e5 | 2246 | struct hlist_head *head; |
b67bfe0d | 2247 | struct hlist_node *safe; |
56303d34 | 2248 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 2249 | |
db08e6e5 SW |
2250 | spin_lock_bh(&tt_global_entry->list_lock); |
2251 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 2252 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 2253 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 2254 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
2255 | } |
2256 | ||
1d8ab8d3 | 2257 | /** |
7e9a8c2c | 2258 | * batadv_tt_global_del_orig_node() - remove orig_node from a global tt entry |
1d8ab8d3 LL |
2259 | * @bat_priv: the bat priv with all the soft interface information |
2260 | * @tt_global_entry: the global entry to remove the orig_node from | |
2261 | * @orig_node: the originator announcing the client | |
2262 | * @message: message to append to the log on deletion | |
2263 | * | |
2264 | * Remove the given orig_node and its according orig_entry from the given | |
2265 | * global tt entry. | |
2266 | */ | |
a513088d | 2267 | static void |
1d8ab8d3 LL |
2268 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
2269 | struct batadv_tt_global_entry *tt_global_entry, | |
2270 | struct batadv_orig_node *orig_node, | |
2271 | const char *message) | |
db08e6e5 SW |
2272 | { |
2273 | struct hlist_head *head; | |
b67bfe0d | 2274 | struct hlist_node *safe; |
56303d34 | 2275 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 2276 | unsigned short vid; |
db08e6e5 SW |
2277 | |
2278 | spin_lock_bh(&tt_global_entry->list_lock); | |
2279 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 2280 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 2281 | if (orig_entry->orig_node == orig_node) { |
16052789 | 2282 | vid = tt_global_entry->common.vid; |
39c75a51 | 2283 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 2284 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 2285 | orig_node->orig, |
16052789 | 2286 | tt_global_entry->common.addr, |
f7a2bd65 | 2287 | batadv_print_vid(vid), message); |
433ff98f ML |
2288 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
2289 | orig_entry); | |
db08e6e5 SW |
2290 | } |
2291 | } | |
2292 | spin_unlock_bh(&tt_global_entry->list_lock); | |
2293 | } | |
2294 | ||
db08e6e5 | 2295 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
2296 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
2297 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 2298 | */ |
a513088d | 2299 | static void |
56303d34 SE |
2300 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
2301 | struct batadv_tt_global_entry *tt_global_entry, | |
2302 | struct batadv_orig_node *orig_node, | |
2303 | const char *message) | |
db08e6e5 SW |
2304 | { |
2305 | bool last_entry = true; | |
2306 | struct hlist_head *head; | |
56303d34 | 2307 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
2308 | |
2309 | /* no local entry exists, case 1: | |
2310 | * Check if this is the last one or if other entries exist. | |
2311 | */ | |
2312 | ||
2313 | rcu_read_lock(); | |
2314 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 2315 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
2316 | if (orig_entry->orig_node != orig_node) { |
2317 | last_entry = false; | |
2318 | break; | |
2319 | } | |
2320 | } | |
2321 | rcu_read_unlock(); | |
2322 | ||
2323 | if (last_entry) { | |
2324 | /* its the last one, mark for roaming. */ | |
acd34afa | 2325 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 2326 | tt_global_entry->roam_at = jiffies; |
1fda4c0a | 2327 | } else { |
db08e6e5 SW |
2328 | /* there is another entry, we can simply delete this |
2329 | * one and can still use the other one. | |
2330 | */ | |
1d8ab8d3 LL |
2331 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
2332 | orig_node, message); | |
1fda4c0a | 2333 | } |
db08e6e5 SW |
2334 | } |
2335 | ||
c018ad3d | 2336 | /** |
7e9a8c2c | 2337 | * batadv_tt_global_del() - remove a client from the global table |
c018ad3d AQ |
2338 | * @bat_priv: the bat priv with all the soft interface information |
2339 | * @orig_node: an originator serving this client | |
2340 | * @addr: the mac address of the client | |
2341 | * @vid: VLAN identifier | |
2342 | * @message: a message explaining the reason for deleting the client to print | |
2343 | * for debugging purpose | |
2344 | * @roaming: true if the deletion has been triggered by a roaming event | |
2345 | */ | |
56303d34 SE |
2346 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
2347 | struct batadv_orig_node *orig_node, | |
c018ad3d | 2348 | const unsigned char *addr, unsigned short vid, |
a513088d | 2349 | const char *message, bool roaming) |
a73105b8 | 2350 | { |
170173bf | 2351 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 2352 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 2353 | |
c018ad3d | 2354 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 2355 | if (!tt_global_entry) |
7683fdc1 | 2356 | goto out; |
a73105b8 | 2357 | |
db08e6e5 | 2358 | if (!roaming) { |
1d8ab8d3 LL |
2359 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
2360 | orig_node, message); | |
db08e6e5 SW |
2361 | |
2362 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
2363 | batadv_tt_global_free(bat_priv, tt_global_entry, |
2364 | message); | |
db08e6e5 SW |
2365 | |
2366 | goto out; | |
2367 | } | |
92f90f56 SE |
2368 | |
2369 | /* if we are deleting a global entry due to a roam | |
2370 | * event, there are two possibilities: | |
db08e6e5 SW |
2371 | * 1) the client roamed from node A to node B => if there |
2372 | * is only one originator left for this client, we mark | |
acd34afa | 2373 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
2374 | * wait for node B to claim it. In case of timeout |
2375 | * the entry is purged. | |
db08e6e5 SW |
2376 | * |
2377 | * If there are other originators left, we directly delete | |
2378 | * the originator. | |
92f90f56 | 2379 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
2380 | * the global entry, since it is useless now. |
2381 | */ | |
a513088d | 2382 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
2383 | tt_global_entry->common.addr, |
2384 | vid); | |
a513088d | 2385 | if (local_entry) { |
db08e6e5 | 2386 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 2387 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 2388 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
1fda4c0a | 2389 | } else { |
db08e6e5 | 2390 | /* no local entry exists, case 1: check for roaming */ |
a513088d SE |
2391 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
2392 | orig_node, message); | |
1fda4c0a | 2393 | } |
92f90f56 | 2394 | |
cc47f66e | 2395 | out: |
7683fdc1 | 2396 | if (tt_global_entry) |
5dafd8a6 | 2397 | batadv_tt_global_entry_put(tt_global_entry); |
a513088d | 2398 | if (local_entry) |
95c0db90 | 2399 | batadv_tt_local_entry_put(local_entry); |
a73105b8 AQ |
2400 | } |
2401 | ||
95fb130d | 2402 | /** |
7e9a8c2c SE |
2403 | * batadv_tt_global_del_orig() - remove all the TT global entries belonging to |
2404 | * the given originator matching the provided vid | |
95fb130d AQ |
2405 | * @bat_priv: the bat priv with all the soft interface information |
2406 | * @orig_node: the originator owning the entries to remove | |
2407 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
2408 | * removed | |
2409 | * @message: debug message to print as "reason" | |
2410 | */ | |
56303d34 SE |
2411 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
2412 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2413 | s32 match_vid, |
56303d34 | 2414 | const char *message) |
c6c8fea2 | 2415 | { |
56303d34 SE |
2416 | struct batadv_tt_global_entry *tt_global; |
2417 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 2418 | u32 i; |
807736f6 | 2419 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 2420 | struct hlist_node *safe; |
a73105b8 | 2421 | struct hlist_head *head; |
7683fdc1 | 2422 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 2423 | unsigned short vid; |
c6c8fea2 | 2424 | |
6e801494 SW |
2425 | if (!hash) |
2426 | return; | |
2427 | ||
a73105b8 AQ |
2428 | for (i = 0; i < hash->size; i++) { |
2429 | head = &hash->table[i]; | |
7683fdc1 | 2430 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 2431 | |
7683fdc1 | 2432 | spin_lock_bh(list_lock); |
b67bfe0d | 2433 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 2434 | head, hash_entry) { |
95fb130d AQ |
2435 | /* remove only matching entries */ |
2436 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
2437 | continue; | |
2438 | ||
56303d34 SE |
2439 | tt_global = container_of(tt_common_entry, |
2440 | struct batadv_tt_global_entry, | |
2441 | common); | |
db08e6e5 | 2442 | |
1d8ab8d3 LL |
2443 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
2444 | orig_node, message); | |
db08e6e5 | 2445 | |
56303d34 | 2446 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 2447 | vid = tt_global->common.vid; |
39c75a51 | 2448 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2449 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2450 | tt_global->common.addr, | |
f7a2bd65 | 2451 | batadv_print_vid(vid), message); |
b67bfe0d | 2452 | hlist_del_rcu(&tt_common_entry->hash_entry); |
5dafd8a6 | 2453 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 | 2454 | } |
a73105b8 | 2455 | } |
7683fdc1 | 2456 | spin_unlock_bh(list_lock); |
c6c8fea2 | 2457 | } |
ac4eebd4 | 2458 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
2459 | } |
2460 | ||
30cfd02b AQ |
2461 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
2462 | char **msg) | |
cc47f66e | 2463 | { |
30cfd02b AQ |
2464 | bool purge = false; |
2465 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
2466 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 2467 | |
30cfd02b AQ |
2468 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
2469 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
2470 | purge = true; | |
2471 | *msg = "Roaming timeout\n"; | |
2472 | } | |
42d0b044 | 2473 | |
30cfd02b AQ |
2474 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
2475 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
2476 | purge = true; | |
2477 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 2478 | } |
30cfd02b AQ |
2479 | |
2480 | return purge; | |
42d0b044 SE |
2481 | } |
2482 | ||
30cfd02b | 2483 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 2484 | { |
807736f6 | 2485 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 2486 | struct hlist_head *head; |
b67bfe0d | 2487 | struct hlist_node *node_tmp; |
7683fdc1 | 2488 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 2489 | u32 i; |
30cfd02b AQ |
2490 | char *msg = NULL; |
2491 | struct batadv_tt_common_entry *tt_common; | |
2492 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 2493 | |
cc47f66e AQ |
2494 | for (i = 0; i < hash->size; i++) { |
2495 | head = &hash->table[i]; | |
7683fdc1 | 2496 | list_lock = &hash->list_locks[i]; |
cc47f66e | 2497 | |
7683fdc1 | 2498 | spin_lock_bh(list_lock); |
b67bfe0d | 2499 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
2500 | hash_entry) { |
2501 | tt_global = container_of(tt_common, | |
2502 | struct batadv_tt_global_entry, | |
2503 | common); | |
2504 | ||
2505 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
2506 | continue; | |
2507 | ||
2508 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
2509 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2510 | tt_global->common.addr, | |
f7a2bd65 | 2511 | batadv_print_vid(tt_global->common.vid), |
16052789 | 2512 | msg); |
30cfd02b | 2513 | |
b67bfe0d | 2514 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b | 2515 | |
5dafd8a6 | 2516 | batadv_tt_global_entry_put(tt_global); |
30cfd02b | 2517 | } |
7683fdc1 | 2518 | spin_unlock_bh(list_lock); |
cc47f66e | 2519 | } |
cc47f66e AQ |
2520 | } |
2521 | ||
56303d34 | 2522 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 2523 | { |
5bf74e9c | 2524 | struct batadv_hashtable *hash; |
7683fdc1 | 2525 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
2526 | struct batadv_tt_common_entry *tt_common_entry; |
2527 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 2528 | struct hlist_node *node_tmp; |
7683fdc1 | 2529 | struct hlist_head *head; |
6b5e971a | 2530 | u32 i; |
7683fdc1 | 2531 | |
807736f6 | 2532 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
2533 | return; |
2534 | ||
807736f6 | 2535 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
2536 | |
2537 | for (i = 0; i < hash->size; i++) { | |
2538 | head = &hash->table[i]; | |
2539 | list_lock = &hash->list_locks[i]; | |
2540 | ||
2541 | spin_lock_bh(list_lock); | |
b67bfe0d | 2542 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 2543 | head, hash_entry) { |
b67bfe0d | 2544 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
2545 | tt_global = container_of(tt_common_entry, |
2546 | struct batadv_tt_global_entry, | |
2547 | common); | |
5dafd8a6 | 2548 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 AQ |
2549 | } |
2550 | spin_unlock_bh(list_lock); | |
2551 | } | |
2552 | ||
1a8eaf07 | 2553 | batadv_hash_destroy(hash); |
7683fdc1 | 2554 | |
807736f6 | 2555 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2556 | } |
2557 | ||
56303d34 SE |
2558 | static bool |
2559 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2560 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd | 2561 | { |
acd34afa SE |
2562 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2563 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
75ae84a4 | 2564 | return true; |
59b699cd | 2565 | |
2d2fcc2a AQ |
2566 | /* check if the two clients are marked as isolated */ |
2567 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2568 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
75ae84a4 | 2569 | return true; |
2d2fcc2a | 2570 | |
75ae84a4 | 2571 | return false; |
59b699cd AQ |
2572 | } |
2573 | ||
c018ad3d | 2574 | /** |
7e9a8c2c | 2575 | * batadv_transtable_search() - get the mesh destination for a given client |
c018ad3d AQ |
2576 | * @bat_priv: the bat priv with all the soft interface information |
2577 | * @src: mac address of the source client | |
2578 | * @addr: mac address of the destination client | |
2579 | * @vid: VLAN identifier | |
2580 | * | |
62fe710f | 2581 | * Return: a pointer to the originator that was selected as destination in the |
c018ad3d AQ |
2582 | * mesh for contacting the client 'addr', NULL otherwise. |
2583 | * In case of multiple originators serving the same client, the function returns | |
2584 | * the best one (best in terms of metric towards the destination node). | |
2585 | * | |
2586 | * If the two clients are AP isolated the function returns NULL. | |
2587 | */ | |
56303d34 | 2588 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2589 | const u8 *src, |
2590 | const u8 *addr, | |
c018ad3d | 2591 | unsigned short vid) |
c6c8fea2 | 2592 | { |
56303d34 SE |
2593 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2594 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2595 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2596 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2597 | |
eceb22ae | 2598 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2599 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2600 | if (!tt_local_entry || |
2601 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2602 | goto out; |
2603 | } | |
7aadf889 | 2604 | |
c018ad3d | 2605 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2606 | if (!tt_global_entry) |
7b36e8ee | 2607 | goto out; |
7aadf889 | 2608 | |
3d393e47 | 2609 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2610 | * isolation |
2611 | */ | |
a513088d SE |
2612 | if (tt_local_entry && |
2613 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2614 | goto out; |
2615 | ||
db08e6e5 | 2616 | rcu_read_lock(); |
4627456a | 2617 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2618 | /* found anything? */ |
981d8900 SE |
2619 | if (best_entry) |
2620 | orig_node = best_entry->orig_node; | |
7c124391 | 2621 | if (orig_node && !kref_get_unless_zero(&orig_node->refcount)) |
db08e6e5 SW |
2622 | orig_node = NULL; |
2623 | rcu_read_unlock(); | |
981d8900 | 2624 | |
7b36e8ee | 2625 | out: |
3d393e47 | 2626 | if (tt_global_entry) |
5dafd8a6 | 2627 | batadv_tt_global_entry_put(tt_global_entry); |
3d393e47 | 2628 | if (tt_local_entry) |
95c0db90 | 2629 | batadv_tt_local_entry_put(tt_local_entry); |
3d393e47 | 2630 | |
7b36e8ee | 2631 | return orig_node; |
c6c8fea2 | 2632 | } |
a73105b8 | 2633 | |
ced72933 | 2634 | /** |
7e9a8c2c | 2635 | * batadv_tt_global_crc() - calculates the checksum of the local table belonging |
ced72933 AQ |
2636 | * to the given orig_node |
2637 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2638 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2639 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2640 | * |
2641 | * This function computes the checksum for the global table corresponding to a | |
2642 | * specific originator. In particular, the checksum is computed as follows: For | |
2643 | * each client connected to the originator the CRC32C of the MAC address and the | |
2644 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2645 | * together. | |
2646 | * | |
2647 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2648 | * produce a unique hash of the table, but since the order which is used to feed | |
2649 | * the CRC32C function affects the result and since every node in the network | |
2650 | * probably sorts the clients differently, the hash function cannot be directly | |
2651 | * computed over the entire table. Hence the CRC32C is used only on | |
2652 | * the single client entry, while all the results are then xor'ed together | |
2653 | * because the XOR operation can combine them all while trying to reduce the | |
2654 | * noise as much as possible. | |
2655 | * | |
62fe710f | 2656 | * Return: the checksum of the global table of a given originator. |
ced72933 | 2657 | */ |
6b5e971a SE |
2658 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2659 | struct batadv_orig_node *orig_node, | |
2660 | unsigned short vid) | |
a73105b8 | 2661 | { |
807736f6 | 2662 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
54e22f26 | 2663 | struct batadv_tt_orig_list_entry *tt_orig; |
56303d34 SE |
2664 | struct batadv_tt_common_entry *tt_common; |
2665 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2666 | struct hlist_head *head; |
6b5e971a SE |
2667 | u32 i, crc_tmp, crc = 0; |
2668 | u8 flags; | |
a30e22ca | 2669 | __be16 tmp_vid; |
a73105b8 AQ |
2670 | |
2671 | for (i = 0; i < hash->size; i++) { | |
2672 | head = &hash->table[i]; | |
2673 | ||
2674 | rcu_read_lock(); | |
b67bfe0d | 2675 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2676 | tt_global = container_of(tt_common, |
2677 | struct batadv_tt_global_entry, | |
2678 | common); | |
7ea7b4a1 AQ |
2679 | /* compute the CRC only for entries belonging to the |
2680 | * VLAN identified by the vid passed as parameter | |
2681 | */ | |
2682 | if (tt_common->vid != vid) | |
2683 | continue; | |
2684 | ||
db08e6e5 SW |
2685 | /* Roaming clients are in the global table for |
2686 | * consistency only. They don't have to be | |
2687 | * taken into account while computing the | |
2688 | * global crc | |
2689 | */ | |
acd34afa | 2690 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2691 | continue; |
30cfd02b AQ |
2692 | /* Temporary clients have not been announced yet, so |
2693 | * they have to be skipped while computing the global | |
2694 | * crc | |
2695 | */ | |
2696 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2697 | continue; | |
db08e6e5 SW |
2698 | |
2699 | /* find out if this global entry is announced by this | |
2700 | * originator | |
2701 | */ | |
54e22f26 LL |
2702 | tt_orig = batadv_tt_global_orig_entry_find(tt_global, |
2703 | orig_node); | |
2704 | if (!tt_orig) | |
db08e6e5 SW |
2705 | continue; |
2706 | ||
a30e22ca AQ |
2707 | /* use network order to read the VID: this ensures that |
2708 | * every node reads the bytes in the same order. | |
2709 | */ | |
2710 | tmp_vid = htons(tt_common->vid); | |
2711 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2712 | |
2713 | /* compute the CRC on flags that have to be kept in sync | |
2714 | * among nodes | |
2715 | */ | |
54e22f26 | 2716 | flags = tt_orig->flags; |
0eb01568 AQ |
2717 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); |
2718 | ||
0ffa9e8d | 2719 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
54e22f26 LL |
2720 | |
2721 | batadv_tt_orig_list_entry_put(tt_orig); | |
a73105b8 AQ |
2722 | } |
2723 | rcu_read_unlock(); | |
2724 | } | |
2725 | ||
ced72933 | 2726 | return crc; |
a73105b8 AQ |
2727 | } |
2728 | ||
ced72933 | 2729 | /** |
7e9a8c2c | 2730 | * batadv_tt_local_crc() - calculates the checksum of the local table |
ced72933 | 2731 | * @bat_priv: the bat priv with all the soft interface information |
7ea7b4a1 | 2732 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2733 | * |
2734 | * For details about the computation, please refer to the documentation for | |
2735 | * batadv_tt_global_crc(). | |
2736 | * | |
62fe710f | 2737 | * Return: the checksum of the local table |
ced72933 | 2738 | */ |
6b5e971a SE |
2739 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2740 | unsigned short vid) | |
a73105b8 | 2741 | { |
807736f6 | 2742 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2743 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2744 | struct hlist_head *head; |
6b5e971a SE |
2745 | u32 i, crc_tmp, crc = 0; |
2746 | u8 flags; | |
a30e22ca | 2747 | __be16 tmp_vid; |
a73105b8 AQ |
2748 | |
2749 | for (i = 0; i < hash->size; i++) { | |
2750 | head = &hash->table[i]; | |
2751 | ||
2752 | rcu_read_lock(); | |
b67bfe0d | 2753 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2754 | /* compute the CRC only for entries belonging to the |
2755 | * VLAN identified by vid | |
2756 | */ | |
2757 | if (tt_common->vid != vid) | |
2758 | continue; | |
2759 | ||
058d0e26 | 2760 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2761 | * account while computing the CRC |
2762 | */ | |
acd34afa | 2763 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2764 | continue; |
ced72933 | 2765 | |
a30e22ca AQ |
2766 | /* use network order to read the VID: this ensures that |
2767 | * every node reads the bytes in the same order. | |
2768 | */ | |
2769 | tmp_vid = htons(tt_common->vid); | |
2770 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2771 | |
2772 | /* compute the CRC on flags that have to be kept in sync | |
2773 | * among nodes | |
2774 | */ | |
2775 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2776 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2777 | ||
0ffa9e8d | 2778 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2779 | } |
a73105b8 AQ |
2780 | rcu_read_unlock(); |
2781 | } | |
2782 | ||
ced72933 | 2783 | return crc; |
a73105b8 AQ |
2784 | } |
2785 | ||
9c4604a2 | 2786 | /** |
7e9a8c2c | 2787 | * batadv_tt_req_node_release() - free tt_req node entry |
9c4604a2 SE |
2788 | * @ref: kref pointer of the tt req_node entry |
2789 | */ | |
2790 | static void batadv_tt_req_node_release(struct kref *ref) | |
2791 | { | |
2792 | struct batadv_tt_req_node *tt_req_node; | |
2793 | ||
2794 | tt_req_node = container_of(ref, struct batadv_tt_req_node, refcount); | |
2795 | ||
86452f81 | 2796 | kmem_cache_free(batadv_tt_req_cache, tt_req_node); |
9c4604a2 SE |
2797 | } |
2798 | ||
2799 | /** | |
7e9a8c2c | 2800 | * batadv_tt_req_node_put() - decrement the tt_req_node refcounter and |
9c4604a2 SE |
2801 | * possibly release it |
2802 | * @tt_req_node: tt_req_node to be free'd | |
2803 | */ | |
2804 | static void batadv_tt_req_node_put(struct batadv_tt_req_node *tt_req_node) | |
2805 | { | |
2806 | kref_put(&tt_req_node->refcount, batadv_tt_req_node_release); | |
2807 | } | |
2808 | ||
56303d34 | 2809 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2810 | { |
7c26a53b ML |
2811 | struct batadv_tt_req_node *node; |
2812 | struct hlist_node *safe; | |
a73105b8 | 2813 | |
807736f6 | 2814 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2815 | |
7c26a53b ML |
2816 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2817 | hlist_del_init(&node->list); | |
9c4604a2 | 2818 | batadv_tt_req_node_put(node); |
a73105b8 AQ |
2819 | } |
2820 | ||
807736f6 | 2821 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2822 | } |
2823 | ||
56303d34 SE |
2824 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2825 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2826 | const void *tt_buff, |
6b5e971a | 2827 | u16 tt_buff_len) |
a73105b8 | 2828 | { |
a73105b8 | 2829 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2830 | * last OGM (the OGM could carry no changes) |
2831 | */ | |
a73105b8 AQ |
2832 | spin_lock_bh(&orig_node->tt_buff_lock); |
2833 | if (tt_buff_len > 0) { | |
2834 | kfree(orig_node->tt_buff); | |
2835 | orig_node->tt_buff_len = 0; | |
2836 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2837 | if (orig_node->tt_buff) { | |
2838 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2839 | orig_node->tt_buff_len = tt_buff_len; | |
2840 | } | |
2841 | } | |
2842 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2843 | } | |
2844 | ||
56303d34 | 2845 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2846 | { |
7c26a53b ML |
2847 | struct batadv_tt_req_node *node; |
2848 | struct hlist_node *safe; | |
a73105b8 | 2849 | |
807736f6 | 2850 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2851 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2852 | if (batadv_has_timed_out(node->issued_at, |
2853 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2854 | hlist_del_init(&node->list); |
9c4604a2 | 2855 | batadv_tt_req_node_put(node); |
a73105b8 AQ |
2856 | } |
2857 | } | |
807736f6 | 2858 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2859 | } |
2860 | ||
383b8636 | 2861 | /** |
7e9a8c2c | 2862 | * batadv_tt_req_node_new() - search and possibly create a tt_req_node object |
383b8636 ML |
2863 | * @bat_priv: the bat priv with all the soft interface information |
2864 | * @orig_node: orig node this request is being issued for | |
2865 | * | |
62fe710f | 2866 | * Return: the pointer to the new tt_req_node struct if no request |
383b8636 | 2867 | * has already been issued for this orig_node, NULL otherwise. |
9cfc7bd6 | 2868 | */ |
56303d34 | 2869 | static struct batadv_tt_req_node * |
383b8636 | 2870 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2871 | struct batadv_orig_node *orig_node) |
a73105b8 | 2872 | { |
56303d34 | 2873 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2874 | |
807736f6 | 2875 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2876 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2877 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2878 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2879 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2880 | goto unlock; |
2881 | } | |
2882 | ||
86452f81 | 2883 | tt_req_node = kmem_cache_alloc(batadv_tt_req_cache, GFP_ATOMIC); |
a73105b8 AQ |
2884 | if (!tt_req_node) |
2885 | goto unlock; | |
2886 | ||
9c4604a2 | 2887 | kref_init(&tt_req_node->refcount); |
8fdd0153 | 2888 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2889 | tt_req_node->issued_at = jiffies; |
2890 | ||
9c4604a2 | 2891 | kref_get(&tt_req_node->refcount); |
7c26a53b | 2892 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2893 | unlock: |
807736f6 | 2894 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2895 | return tt_req_node; |
2896 | } | |
2897 | ||
335fbe0f | 2898 | /** |
7072337e | 2899 | * batadv_tt_local_valid() - verify local tt entry and get flags |
335fbe0f ML |
2900 | * @entry_ptr: to be checked local tt entry |
2901 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
7072337e LL |
2902 | * @flags: a pointer to store TT flags for this client to |
2903 | * | |
2904 | * Checks the validity of the given local TT entry. If it is, then the provided | |
2905 | * flags pointer is updated. | |
335fbe0f | 2906 | * |
4b426b10 | 2907 | * Return: true if the entry is a valid, false otherwise. |
335fbe0f | 2908 | */ |
7072337e LL |
2909 | static bool batadv_tt_local_valid(const void *entry_ptr, |
2910 | const void *data_ptr, | |
2911 | u8 *flags) | |
058d0e26 | 2912 | { |
56303d34 | 2913 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2914 | |
acd34afa | 2915 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
4b426b10 | 2916 | return false; |
7072337e LL |
2917 | |
2918 | if (flags) | |
2919 | *flags = tt_common_entry->flags; | |
2920 | ||
4b426b10 | 2921 | return true; |
058d0e26 AQ |
2922 | } |
2923 | ||
7072337e LL |
2924 | /** |
2925 | * batadv_tt_global_valid() - verify global tt entry and get flags | |
2926 | * @entry_ptr: to be checked global tt entry | |
2927 | * @data_ptr: an orig_node object (may be NULL) | |
2928 | * @flags: a pointer to store TT flags for this client to | |
2929 | * | |
2930 | * Checks the validity of the given global TT entry. If it is, then the provided | |
2931 | * flags pointer is updated either with the common (summed) TT flags if data_ptr | |
2932 | * is NULL or the specific, per originator TT flags otherwise. | |
2933 | * | |
2934 | * Return: true if the entry is a valid, false otherwise. | |
2935 | */ | |
4b426b10 | 2936 | static bool batadv_tt_global_valid(const void *entry_ptr, |
7072337e LL |
2937 | const void *data_ptr, |
2938 | u8 *flags) | |
a73105b8 | 2939 | { |
56303d34 SE |
2940 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2941 | const struct batadv_tt_global_entry *tt_global_entry; | |
2942 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2943 | |
30cfd02b AQ |
2944 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2945 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
4b426b10 | 2946 | return false; |
cc47f66e | 2947 | |
56303d34 SE |
2948 | tt_global_entry = container_of(tt_common_entry, |
2949 | struct batadv_tt_global_entry, | |
48100bac AQ |
2950 | common); |
2951 | ||
7072337e LL |
2952 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node, |
2953 | flags); | |
a73105b8 AQ |
2954 | } |
2955 | ||
335fbe0f | 2956 | /** |
7e9a8c2c | 2957 | * batadv_tt_tvlv_generate() - fill the tvlv buff with the tt entries from the |
7ea7b4a1 | 2958 | * specified tt hash |
335fbe0f ML |
2959 | * @bat_priv: the bat priv with all the soft interface information |
2960 | * @hash: hash table containing the tt entries | |
2961 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2962 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
7072337e | 2963 | * @valid_cb: function to filter tt change entries and to return TT flags |
335fbe0f | 2964 | * @cb_data: data passed to the filter function as argument |
7072337e LL |
2965 | * |
2966 | * Fills the tvlv buff with the tt entries from the specified hash. If valid_cb | |
2967 | * is not provided then this becomes a no-op. | |
335fbe0f | 2968 | */ |
7ea7b4a1 AQ |
2969 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2970 | struct batadv_hashtable *hash, | |
6b5e971a | 2971 | void *tvlv_buff, u16 tt_len, |
4b426b10 | 2972 | bool (*valid_cb)(const void *, |
7072337e LL |
2973 | const void *, |
2974 | u8 *flags), | |
7ea7b4a1 | 2975 | void *cb_data) |
a73105b8 | 2976 | { |
56303d34 | 2977 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2978 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2979 | struct hlist_head *head; |
6b5e971a | 2980 | u16 tt_tot, tt_num_entries = 0; |
7072337e LL |
2981 | u8 flags; |
2982 | bool ret; | |
6b5e971a | 2983 | u32 i; |
a73105b8 | 2984 | |
298e6e68 | 2985 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2986 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 | 2987 | |
7072337e LL |
2988 | if (!valid_cb) |
2989 | return; | |
2990 | ||
a73105b8 AQ |
2991 | rcu_read_lock(); |
2992 | for (i = 0; i < hash->size; i++) { | |
2993 | head = &hash->table[i]; | |
2994 | ||
b67bfe0d | 2995 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2996 | head, hash_entry) { |
335fbe0f | 2997 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2998 | break; |
2999 | ||
7072337e LL |
3000 | ret = valid_cb(tt_common_entry, cb_data, &flags); |
3001 | if (!ret) | |
a73105b8 AQ |
3002 | continue; |
3003 | ||
8fdd0153 | 3004 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
7072337e | 3005 | tt_change->flags = flags; |
c018ad3d | 3006 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
3007 | memset(tt_change->reserved, 0, |
3008 | sizeof(tt_change->reserved)); | |
a73105b8 | 3009 | |
335fbe0f | 3010 | tt_num_entries++; |
a73105b8 AQ |
3011 | tt_change++; |
3012 | } | |
3013 | } | |
3014 | rcu_read_unlock(); | |
7ea7b4a1 | 3015 | } |
a73105b8 | 3016 | |
7ea7b4a1 | 3017 | /** |
7e9a8c2c | 3018 | * batadv_tt_global_check_crc() - check if all the CRCs are correct |
7ea7b4a1 AQ |
3019 | * @orig_node: originator for which the CRCs have to be checked |
3020 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
3021 | * @num_vlan: number of tvlv VLAN entries | |
7ea7b4a1 | 3022 | * |
62fe710f | 3023 | * Return: true if all the received CRCs match the locally stored ones, false |
7ea7b4a1 AQ |
3024 | * otherwise |
3025 | */ | |
3026 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
3027 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 3028 | u16 num_vlan) |
7ea7b4a1 AQ |
3029 | { |
3030 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
3031 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 3032 | int i, orig_num_vlan; |
6b5e971a | 3033 | u32 crc; |
7ea7b4a1 AQ |
3034 | |
3035 | /* check if each received CRC matches the locally stored one */ | |
3036 | for (i = 0; i < num_vlan; i++) { | |
3037 | tt_vlan_tmp = tt_vlan + i; | |
3038 | ||
3039 | /* if orig_node is a backbone node for this VLAN, don't check | |
3040 | * the CRC as we ignore all the global entries over it | |
3041 | */ | |
3042 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
3043 | orig_node->orig, |
3044 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
3045 | continue; |
3046 | ||
3047 | vlan = batadv_orig_node_vlan_get(orig_node, | |
3048 | ntohs(tt_vlan_tmp->vid)); | |
3049 | if (!vlan) | |
3050 | return false; | |
3051 | ||
91c2b1a9 | 3052 | crc = vlan->tt.crc; |
21754e25 | 3053 | batadv_orig_node_vlan_put(vlan); |
91c2b1a9 AQ |
3054 | |
3055 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
3056 | return false; |
3057 | } | |
3058 | ||
c169c59d SW |
3059 | /* check if any excess VLANs exist locally for the originator |
3060 | * which are not mentioned in the TVLV from the originator. | |
3061 | */ | |
3062 | rcu_read_lock(); | |
3063 | orig_num_vlan = 0; | |
3064 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
3065 | orig_num_vlan++; | |
3066 | rcu_read_unlock(); | |
3067 | ||
3068 | if (orig_num_vlan > num_vlan) | |
3069 | return false; | |
3070 | ||
7ea7b4a1 AQ |
3071 | return true; |
3072 | } | |
3073 | ||
3074 | /** | |
7e9a8c2c | 3075 | * batadv_tt_local_update_crc() - update all the local CRCs |
7ea7b4a1 AQ |
3076 | * @bat_priv: the bat priv with all the soft interface information |
3077 | */ | |
3078 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
3079 | { | |
3080 | struct batadv_softif_vlan *vlan; | |
3081 | ||
3082 | /* recompute the global CRC for each VLAN */ | |
3083 | rcu_read_lock(); | |
3084 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
3085 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
3086 | } | |
3087 | rcu_read_unlock(); | |
3088 | } | |
3089 | ||
3090 | /** | |
7e9a8c2c | 3091 | * batadv_tt_global_update_crc() - update all the global CRCs for this orig_node |
7ea7b4a1 AQ |
3092 | * @bat_priv: the bat priv with all the soft interface information |
3093 | * @orig_node: the orig_node for which the CRCs have to be updated | |
3094 | */ | |
3095 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
3096 | struct batadv_orig_node *orig_node) | |
3097 | { | |
3098 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 3099 | u32 crc; |
7ea7b4a1 AQ |
3100 | |
3101 | /* recompute the global CRC for each VLAN */ | |
3102 | rcu_read_lock(); | |
d0fa4f3f | 3103 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
3104 | /* if orig_node is a backbone node for this VLAN, don't compute |
3105 | * the CRC as we ignore all the global entries over it | |
3106 | */ | |
cfd4f757 AQ |
3107 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
3108 | vlan->vid)) | |
7ea7b4a1 AQ |
3109 | continue; |
3110 | ||
3111 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
3112 | vlan->tt.crc = crc; | |
3113 | } | |
3114 | rcu_read_unlock(); | |
a73105b8 AQ |
3115 | } |
3116 | ||
ced72933 | 3117 | /** |
7e9a8c2c | 3118 | * batadv_send_tt_request() - send a TT Request message to a given node |
ced72933 AQ |
3119 | * @bat_priv: the bat priv with all the soft interface information |
3120 | * @dst_orig_node: the destination of the message | |
3121 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
3122 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
3123 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
3124 | * @full_table: ask for the entire translation table if true, while only for the |
3125 | * last TT diff otherwise | |
d15cd622 AQ |
3126 | * |
3127 | * Return: true if the TT Request was sent, false otherwise | |
ced72933 | 3128 | */ |
4b426b10 SE |
3129 | static bool batadv_send_tt_request(struct batadv_priv *bat_priv, |
3130 | struct batadv_orig_node *dst_orig_node, | |
3131 | u8 ttvn, | |
3132 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
3133 | u16 num_vlan, bool full_table) | |
a73105b8 | 3134 | { |
335fbe0f | 3135 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 3136 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
3137 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
3138 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 3139 | bool ret = false; |
7ea7b4a1 | 3140 | int i, size; |
a73105b8 | 3141 | |
e5d89254 | 3142 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
3143 | if (!primary_if) |
3144 | goto out; | |
3145 | ||
3146 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
3147 | * reply from the same orig_node yet |
3148 | */ | |
383b8636 | 3149 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
3150 | if (!tt_req_node) |
3151 | goto out; | |
3152 | ||
7ea7b4a1 AQ |
3153 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
3154 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 3155 | if (!tvlv_tt_data) |
a73105b8 AQ |
3156 | goto out; |
3157 | ||
335fbe0f ML |
3158 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
3159 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
3160 | tvlv_tt_data->num_vlan = htons(num_vlan); |
3161 | ||
3162 | /* send all the CRCs within the request. This is needed by intermediate | |
3163 | * nodes to ensure they have the correct table before replying | |
3164 | */ | |
3165 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
3166 | for (i = 0; i < num_vlan; i++) { | |
3167 | tt_vlan_req->vid = tt_vlan->vid; | |
3168 | tt_vlan_req->crc = tt_vlan->crc; | |
3169 | ||
3170 | tt_vlan_req++; | |
3171 | tt_vlan++; | |
3172 | } | |
a73105b8 AQ |
3173 | |
3174 | if (full_table) | |
335fbe0f | 3175 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3176 | |
bb351ba0 | 3177 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 3178 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 3179 | |
d69909d2 | 3180 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
3181 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
3182 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 3183 | tvlv_tt_data, size); |
335fbe0f | 3184 | ret = true; |
a73105b8 AQ |
3185 | |
3186 | out: | |
a73105b8 | 3187 | if (primary_if) |
82047ad7 | 3188 | batadv_hardif_put(primary_if); |
9c4604a2 | 3189 | |
a73105b8 | 3190 | if (ret && tt_req_node) { |
807736f6 | 3191 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
9c4604a2 SE |
3192 | if (!hlist_unhashed(&tt_req_node->list)) { |
3193 | hlist_del_init(&tt_req_node->list); | |
3194 | batadv_tt_req_node_put(tt_req_node); | |
3195 | } | |
807736f6 | 3196 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 3197 | } |
9c4604a2 SE |
3198 | |
3199 | if (tt_req_node) | |
3200 | batadv_tt_req_node_put(tt_req_node); | |
3201 | ||
335fbe0f | 3202 | kfree(tvlv_tt_data); |
a73105b8 AQ |
3203 | return ret; |
3204 | } | |
3205 | ||
335fbe0f | 3206 | /** |
7e9a8c2c | 3207 | * batadv_send_other_tt_response() - send reply to tt request concerning another |
335fbe0f ML |
3208 | * node's translation table |
3209 | * @bat_priv: the bat priv with all the soft interface information | |
3210 | * @tt_data: tt data containing the tt request information | |
3211 | * @req_src: mac address of tt request sender | |
3212 | * @req_dst: mac address of tt request recipient | |
3213 | * | |
62fe710f | 3214 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3215 | */ |
3216 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
3217 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3218 | u8 *req_src, u8 *req_dst) |
a73105b8 | 3219 | { |
170173bf | 3220 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 3221 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 3222 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 3223 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 3224 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 3225 | bool ret = false, full_table; |
6b5e971a SE |
3226 | u8 orig_ttvn, req_ttvn; |
3227 | u16 tvlv_len; | |
3228 | s32 tt_len; | |
a73105b8 | 3229 | |
39c75a51 | 3230 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3231 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 3232 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 3233 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
3234 | |
3235 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 3236 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
3237 | if (!req_dst_orig_node) |
3238 | goto out; | |
3239 | ||
335fbe0f | 3240 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
3241 | if (!res_dst_orig_node) |
3242 | goto out; | |
3243 | ||
6b5e971a | 3244 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 3245 | req_ttvn = tt_data->ttvn; |
a73105b8 | 3246 | |
7ea7b4a1 | 3247 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 3248 | /* this node doesn't have the requested data */ |
a73105b8 | 3249 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
3250 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
3251 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
3252 | goto out; |
3253 | ||
015758d0 | 3254 | /* If the full table has been explicitly requested */ |
335fbe0f | 3255 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
3256 | !req_dst_orig_node->tt_buff) |
3257 | full_table = true; | |
3258 | else | |
3259 | full_table = false; | |
3260 | ||
335fbe0f ML |
3261 | /* TT fragmentation hasn't been implemented yet, so send as many |
3262 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 3263 | */ |
a73105b8 AQ |
3264 | if (!full_table) { |
3265 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
3266 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 3267 | |
7ea7b4a1 AQ |
3268 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
3269 | &tvlv_tt_data, | |
3270 | &tt_change, | |
3271 | &tt_len); | |
3272 | if (!tt_len) | |
a73105b8 AQ |
3273 | goto unlock; |
3274 | ||
a73105b8 | 3275 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 3276 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 3277 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
3278 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
3279 | } else { | |
7ea7b4a1 AQ |
3280 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
3281 | * in the initial part | |
3282 | */ | |
3283 | tt_len = -1; | |
3284 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
3285 | &tvlv_tt_data, | |
3286 | &tt_change, | |
3287 | &tt_len); | |
3288 | if (!tt_len) | |
a73105b8 | 3289 | goto out; |
7ea7b4a1 AQ |
3290 | |
3291 | /* fill the rest of the tvlv with the real TT entries */ | |
3292 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
3293 | tt_change, tt_len, | |
3294 | batadv_tt_global_valid, | |
3295 | req_dst_orig_node); | |
a73105b8 AQ |
3296 | } |
3297 | ||
a19d3d85 ML |
3298 | /* Don't send the response, if larger than fragmented packet. */ |
3299 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
3300 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
3301 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
3302 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
3303 | res_dst_orig_node->orig); | |
3304 | goto out; | |
3305 | } | |
3306 | ||
335fbe0f ML |
3307 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
3308 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
3309 | |
3310 | if (full_table) | |
335fbe0f | 3311 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3312 | |
39c75a51 | 3313 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
3314 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
3315 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
3316 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 3317 | |
d69909d2 | 3318 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 3319 | |
335fbe0f | 3320 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
3321 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
3322 | tvlv_len); | |
e91ecfc6 | 3323 | |
335fbe0f | 3324 | ret = true; |
a73105b8 AQ |
3325 | goto out; |
3326 | ||
3327 | unlock: | |
3328 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
3329 | ||
3330 | out: | |
3331 | if (res_dst_orig_node) | |
5d967310 | 3332 | batadv_orig_node_put(res_dst_orig_node); |
a73105b8 | 3333 | if (req_dst_orig_node) |
5d967310 | 3334 | batadv_orig_node_put(req_dst_orig_node); |
335fbe0f | 3335 | kfree(tvlv_tt_data); |
a73105b8 | 3336 | return ret; |
a73105b8 | 3337 | } |
96412690 | 3338 | |
335fbe0f | 3339 | /** |
7e9a8c2c SE |
3340 | * batadv_send_my_tt_response() - send reply to tt request concerning this |
3341 | * node's translation table | |
335fbe0f ML |
3342 | * @bat_priv: the bat priv with all the soft interface information |
3343 | * @tt_data: tt data containing the tt request information | |
3344 | * @req_src: mac address of tt request sender | |
3345 | * | |
62fe710f | 3346 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3347 | */ |
3348 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
3349 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3350 | u8 *req_src) |
a73105b8 | 3351 | { |
335fbe0f | 3352 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 3353 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
3354 | struct batadv_tvlv_tt_change *tt_change; |
3355 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
3356 | u8 my_ttvn, req_ttvn; |
3357 | u16 tvlv_len; | |
a73105b8 | 3358 | bool full_table; |
6b5e971a | 3359 | s32 tt_len; |
a73105b8 | 3360 | |
39c75a51 | 3361 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3362 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 3363 | req_src, tt_data->ttvn, |
a2f2b6cd | 3364 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3365 | |
a70a9aa9 | 3366 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 3367 | |
6b5e971a | 3368 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 3369 | req_ttvn = tt_data->ttvn; |
a73105b8 | 3370 | |
335fbe0f | 3371 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
3372 | if (!orig_node) |
3373 | goto out; | |
3374 | ||
e5d89254 | 3375 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
3376 | if (!primary_if) |
3377 | goto out; | |
3378 | ||
3379 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
3380 | * is too big send the whole local translation table |
3381 | */ | |
335fbe0f | 3382 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 3383 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
3384 | full_table = true; |
3385 | else | |
3386 | full_table = false; | |
3387 | ||
335fbe0f ML |
3388 | /* TT fragmentation hasn't been implemented yet, so send as many |
3389 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 3390 | */ |
a73105b8 | 3391 | if (!full_table) { |
807736f6 | 3392 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 3393 | |
7ea7b4a1 AQ |
3394 | tt_len = bat_priv->tt.last_changeset_len; |
3395 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
3396 | &tvlv_tt_data, | |
3397 | &tt_change, | |
3398 | &tt_len); | |
c2d0f48a | 3399 | if (!tt_len || !tvlv_len) |
a73105b8 AQ |
3400 | goto unlock; |
3401 | ||
335fbe0f | 3402 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 3403 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
3404 | bat_priv->tt.last_changeset_len); |
3405 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 3406 | } else { |
6b5e971a | 3407 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 3408 | |
7ea7b4a1 AQ |
3409 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
3410 | * in the initial part | |
3411 | */ | |
3412 | tt_len = -1; | |
3413 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
3414 | &tvlv_tt_data, | |
3415 | &tt_change, | |
3416 | &tt_len); | |
c2d0f48a | 3417 | if (!tt_len || !tvlv_len) |
a73105b8 | 3418 | goto out; |
7ea7b4a1 AQ |
3419 | |
3420 | /* fill the rest of the tvlv with the real TT entries */ | |
3421 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
3422 | tt_change, tt_len, | |
3423 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
3424 | } |
3425 | ||
335fbe0f ML |
3426 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
3427 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
3428 | |
3429 | if (full_table) | |
335fbe0f | 3430 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3431 | |
39c75a51 | 3432 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
3433 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
3434 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 3435 | |
d69909d2 | 3436 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 3437 | |
335fbe0f | 3438 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
3439 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
3440 | tvlv_len); | |
335fbe0f | 3441 | |
a73105b8 AQ |
3442 | goto out; |
3443 | ||
3444 | unlock: | |
807736f6 | 3445 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 3446 | out: |
a70a9aa9 | 3447 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 3448 | if (orig_node) |
5d967310 | 3449 | batadv_orig_node_put(orig_node); |
a73105b8 | 3450 | if (primary_if) |
82047ad7 | 3451 | batadv_hardif_put(primary_if); |
335fbe0f ML |
3452 | kfree(tvlv_tt_data); |
3453 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
3454 | return true; |
3455 | } | |
3456 | ||
335fbe0f | 3457 | /** |
7e9a8c2c | 3458 | * batadv_send_tt_response() - send reply to tt request |
335fbe0f ML |
3459 | * @bat_priv: the bat priv with all the soft interface information |
3460 | * @tt_data: tt data containing the tt request information | |
3461 | * @req_src: mac address of tt request sender | |
3462 | * @req_dst: mac address of tt request recipient | |
3463 | * | |
62fe710f | 3464 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3465 | */ |
3466 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
3467 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3468 | u8 *req_src, u8 *req_dst) |
a73105b8 | 3469 | { |
cfd4f757 | 3470 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 3471 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
3472 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
3473 | req_dst); | |
a73105b8 AQ |
3474 | } |
3475 | ||
56303d34 SE |
3476 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
3477 | struct batadv_orig_node *orig_node, | |
335fbe0f | 3478 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3479 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
3480 | { |
3481 | int i; | |
a513088d | 3482 | int roams; |
a73105b8 AQ |
3483 | |
3484 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
3485 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
3486 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
3487 | batadv_tt_global_del(bat_priv, orig_node, |
3488 | (tt_change + i)->addr, | |
c018ad3d | 3489 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
3490 | "tt removed by changes", |
3491 | roams); | |
08c36d3e | 3492 | } else { |
08c36d3e | 3493 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 3494 | (tt_change + i)->addr, |
c018ad3d | 3495 | ntohs((tt_change + i)->vid), |
d4f44692 | 3496 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
3497 | /* In case of problem while storing a |
3498 | * global_entry, we stop the updating | |
3499 | * procedure without committing the | |
3500 | * ttvn change. This will avoid to send | |
3501 | * corrupted data on tt_request | |
3502 | */ | |
3503 | return; | |
08c36d3e | 3504 | } |
a73105b8 | 3505 | } |
ac4eebd4 | 3506 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
3507 | } |
3508 | ||
56303d34 | 3509 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 3510 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
3511 | u8 ttvn, u8 *resp_src, |
3512 | u16 num_entries) | |
a73105b8 | 3513 | { |
170173bf | 3514 | struct batadv_orig_node *orig_node; |
a73105b8 | 3515 | |
335fbe0f | 3516 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3517 | if (!orig_node) |
3518 | goto out; | |
3519 | ||
3520 | /* Purge the old table first.. */ | |
95fb130d AQ |
3521 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
3522 | "Received full table"); | |
a73105b8 | 3523 | |
7ea7b4a1 AQ |
3524 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
3525 | ttvn); | |
a73105b8 AQ |
3526 | |
3527 | spin_lock_bh(&orig_node->tt_buff_lock); | |
3528 | kfree(orig_node->tt_buff); | |
3529 | orig_node->tt_buff_len = 0; | |
3530 | orig_node->tt_buff = NULL; | |
3531 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
3532 | ||
7ea7b4a1 | 3533 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
3534 | |
3535 | out: | |
3536 | if (orig_node) | |
5d967310 | 3537 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3538 | } |
3539 | ||
56303d34 SE |
3540 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
3541 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3542 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 3543 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 3544 | { |
a513088d SE |
3545 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
3546 | tt_num_changes, ttvn); | |
a73105b8 | 3547 | |
e8cf234a AQ |
3548 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
3549 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
3550 | atomic_set(&orig_node->last_ttvn, ttvn); |
3551 | } | |
3552 | ||
c018ad3d | 3553 | /** |
7e9a8c2c | 3554 | * batadv_is_my_client() - check if a client is served by the local node |
c018ad3d | 3555 | * @bat_priv: the bat priv with all the soft interface information |
3f68785e | 3556 | * @addr: the mac address of the client to check |
c018ad3d AQ |
3557 | * @vid: VLAN identifier |
3558 | * | |
62fe710f | 3559 | * Return: true if the client is served by this node, false otherwise. |
c018ad3d | 3560 | */ |
6b5e971a | 3561 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 3562 | unsigned short vid) |
a73105b8 | 3563 | { |
170173bf | 3564 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 3565 | bool ret = false; |
a73105b8 | 3566 | |
c018ad3d | 3567 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
3568 | if (!tt_local_entry) |
3569 | goto out; | |
058d0e26 | 3570 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
3571 | * consistency purpose) |
3572 | */ | |
7c1fd91d AQ |
3573 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
3574 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 3575 | goto out; |
7683fdc1 AQ |
3576 | ret = true; |
3577 | out: | |
a73105b8 | 3578 | if (tt_local_entry) |
95c0db90 | 3579 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 3580 | return ret; |
a73105b8 AQ |
3581 | } |
3582 | ||
335fbe0f | 3583 | /** |
7e9a8c2c | 3584 | * batadv_handle_tt_response() - process incoming tt reply |
335fbe0f ML |
3585 | * @bat_priv: the bat priv with all the soft interface information |
3586 | * @tt_data: tt data containing the tt request information | |
3587 | * @resp_src: mac address of tt reply sender | |
3588 | * @num_entries: number of tt change entries appended to the tt data | |
3589 | */ | |
3590 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
3591 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3592 | u8 *resp_src, u16 num_entries) |
a73105b8 | 3593 | { |
7c26a53b ML |
3594 | struct batadv_tt_req_node *node; |
3595 | struct hlist_node *safe; | |
56303d34 | 3596 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 3597 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
3598 | u8 *tvlv_ptr = (u8 *)tt_data; |
3599 | u16 change_offset; | |
a73105b8 | 3600 | |
39c75a51 | 3601 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3602 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 3603 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 3604 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3605 | |
335fbe0f | 3606 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3607 | if (!orig_node) |
3608 | goto out; | |
3609 | ||
a70a9aa9 AQ |
3610 | spin_lock_bh(&orig_node->tt_lock); |
3611 | ||
7ea7b4a1 AQ |
3612 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
3613 | change_offset *= ntohs(tt_data->num_vlan); | |
3614 | change_offset += sizeof(*tt_data); | |
3615 | tvlv_ptr += change_offset; | |
3616 | ||
3617 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 3618 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
3619 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3620 | resp_src, num_entries); | |
96412690 | 3621 | } else { |
335fbe0f ML |
3622 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3623 | tt_data->ttvn, tt_change); | |
96412690 | 3624 | } |
a73105b8 | 3625 | |
a70a9aa9 | 3626 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3627 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3628 | |
3629 | spin_unlock_bh(&orig_node->tt_lock); | |
3630 | ||
a73105b8 | 3631 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3632 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3633 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3634 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3635 | continue; |
7c26a53b | 3636 | hlist_del_init(&node->list); |
9c4604a2 | 3637 | batadv_tt_req_node_put(node); |
a73105b8 | 3638 | } |
7ea7b4a1 | 3639 | |
807736f6 | 3640 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3641 | out: |
3642 | if (orig_node) | |
5d967310 | 3643 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3644 | } |
3645 | ||
56303d34 | 3646 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3647 | { |
56303d34 | 3648 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3649 | |
807736f6 | 3650 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3651 | |
807736f6 | 3652 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e | 3653 | list_del(&node->list); |
86452f81 | 3654 | kmem_cache_free(batadv_tt_roam_cache, node); |
cc47f66e AQ |
3655 | } |
3656 | ||
807736f6 | 3657 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3658 | } |
3659 | ||
56303d34 | 3660 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3661 | { |
56303d34 | 3662 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3663 | |
807736f6 SE |
3664 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3665 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3666 | if (!batadv_has_timed_out(node->first_time, |
3667 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3668 | continue; |
3669 | ||
3670 | list_del(&node->list); | |
86452f81 | 3671 | kmem_cache_free(batadv_tt_roam_cache, node); |
cc47f66e | 3672 | } |
807736f6 | 3673 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3674 | } |
3675 | ||
62fe710f | 3676 | /** |
7e9a8c2c | 3677 | * batadv_tt_check_roam_count() - check if a client has roamed too frequently |
d15cd622 AQ |
3678 | * @bat_priv: the bat priv with all the soft interface information |
3679 | * @client: mac address of the roaming client | |
62fe710f SE |
3680 | * |
3681 | * This function checks whether the client already reached the | |
cc47f66e AQ |
3682 | * maximum number of possible roaming phases. In this case the ROAMING_ADV |
3683 | * will not be sent. | |
3684 | * | |
62fe710f | 3685 | * Return: true if the ROAMING_ADV can be sent, false otherwise |
9cfc7bd6 | 3686 | */ |
6b5e971a | 3687 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3688 | { |
56303d34 | 3689 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3690 | bool ret = false; |
3691 | ||
807736f6 | 3692 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3693 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3694 | * reply from the same orig_node yet |
3695 | */ | |
807736f6 | 3696 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3697 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3698 | continue; |
3699 | ||
1eda58bf | 3700 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3701 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3702 | continue; |
3703 | ||
3e34819e | 3704 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3705 | /* Sorry, you roamed too many times! */ |
3706 | goto unlock; | |
3707 | ret = true; | |
3708 | break; | |
3709 | } | |
3710 | ||
3711 | if (!ret) { | |
86452f81 SE |
3712 | tt_roam_node = kmem_cache_alloc(batadv_tt_roam_cache, |
3713 | GFP_ATOMIC); | |
cc47f66e AQ |
3714 | if (!tt_roam_node) |
3715 | goto unlock; | |
3716 | ||
3717 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3718 | atomic_set(&tt_roam_node->counter, |
3719 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3720 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3721 | |
807736f6 | 3722 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3723 | ret = true; |
3724 | } | |
3725 | ||
3726 | unlock: | |
807736f6 | 3727 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3728 | return ret; |
3729 | } | |
3730 | ||
c018ad3d | 3731 | /** |
7e9a8c2c | 3732 | * batadv_send_roam_adv() - send a roaming advertisement message |
c018ad3d AQ |
3733 | * @bat_priv: the bat priv with all the soft interface information |
3734 | * @client: mac address of the roaming client | |
3735 | * @vid: VLAN identifier | |
3736 | * @orig_node: message destination | |
3737 | * | |
3738 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3739 | * client. This is done to inform the node that from now on all traffic destined | |
3740 | * for this particular roamed client has to be forwarded to the sender of the | |
3741 | * roaming message. | |
3742 | */ | |
6b5e971a | 3743 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3744 | unsigned short vid, |
56303d34 | 3745 | struct batadv_orig_node *orig_node) |
cc47f66e | 3746 | { |
56303d34 | 3747 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3748 | struct batadv_tvlv_roam_adv tvlv_roam; |
3749 | ||
3750 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3751 | if (!primary_if) | |
3752 | goto out; | |
cc47f66e AQ |
3753 | |
3754 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3755 | * already roamed to us too many times |
3756 | */ | |
a513088d | 3757 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3758 | goto out; |
3759 | ||
39c75a51 | 3760 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 3761 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
f7a2bd65 | 3762 | orig_node->orig, client, batadv_print_vid(vid)); |
cc47f66e | 3763 | |
d69909d2 | 3764 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3765 | |
122edaa0 | 3766 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3767 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3768 | |
3769 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3770 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3771 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3772 | |
3773 | out: | |
122edaa0 | 3774 | if (primary_if) |
82047ad7 | 3775 | batadv_hardif_put(primary_if); |
a73105b8 AQ |
3776 | } |
3777 | ||
a513088d | 3778 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3779 | { |
56303d34 | 3780 | struct delayed_work *delayed_work; |
807736f6 | 3781 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3782 | struct batadv_priv *bat_priv; |
3783 | ||
4ba4bc0f | 3784 | delayed_work = to_delayed_work(work); |
807736f6 SE |
3785 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3786 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3787 | |
a19d3d85 | 3788 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3789 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3790 | batadv_tt_req_purge(bat_priv); |
3791 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3792 | |
72414442 AQ |
3793 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3794 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3795 | } |
cc47f66e | 3796 | |
ff15c27c SE |
3797 | /** |
3798 | * batadv_tt_free() - Free translation table of soft interface | |
3799 | * @bat_priv: the bat priv with all the soft interface information | |
3800 | */ | |
56303d34 | 3801 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3802 | { |
e1bf0c14 ML |
3803 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3804 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3805 | ||
807736f6 | 3806 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3807 | |
a513088d SE |
3808 | batadv_tt_local_table_free(bat_priv); |
3809 | batadv_tt_global_table_free(bat_priv); | |
3810 | batadv_tt_req_list_free(bat_priv); | |
3811 | batadv_tt_changes_list_free(bat_priv); | |
3812 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3813 | |
807736f6 | 3814 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3815 | } |
058d0e26 | 3816 | |
7ea7b4a1 | 3817 | /** |
7e9a8c2c | 3818 | * batadv_tt_local_set_flags() - set or unset the specified flags on the local |
7ea7b4a1 AQ |
3819 | * table and possibly count them in the TT size |
3820 | * @bat_priv: the bat priv with all the soft interface information | |
3821 | * @flags: the flag to switch | |
3822 | * @enable: whether to set or unset the flag | |
3823 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3824 | */ |
6b5e971a SE |
3825 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3826 | bool enable, bool count) | |
058d0e26 | 3827 | { |
7ea7b4a1 AQ |
3828 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3829 | struct batadv_tt_common_entry *tt_common_entry; | |
058d0e26 | 3830 | struct hlist_head *head; |
6b5e971a | 3831 | u32 i; |
058d0e26 AQ |
3832 | |
3833 | if (!hash) | |
7ea7b4a1 | 3834 | return; |
058d0e26 AQ |
3835 | |
3836 | for (i = 0; i < hash->size; i++) { | |
3837 | head = &hash->table[i]; | |
3838 | ||
3839 | rcu_read_lock(); | |
b67bfe0d | 3840 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3841 | head, hash_entry) { |
697f2531 AQ |
3842 | if (enable) { |
3843 | if ((tt_common_entry->flags & flags) == flags) | |
3844 | continue; | |
3845 | tt_common_entry->flags |= flags; | |
3846 | } else { | |
3847 | if (!(tt_common_entry->flags & flags)) | |
3848 | continue; | |
3849 | tt_common_entry->flags &= ~flags; | |
3850 | } | |
7ea7b4a1 AQ |
3851 | |
3852 | if (!count) | |
3853 | continue; | |
3854 | ||
3855 | batadv_tt_local_size_inc(bat_priv, | |
3856 | tt_common_entry->vid); | |
058d0e26 AQ |
3857 | } |
3858 | rcu_read_unlock(); | |
3859 | } | |
058d0e26 AQ |
3860 | } |
3861 | ||
acd34afa | 3862 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3863 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3864 | { |
807736f6 | 3865 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3866 | struct batadv_tt_common_entry *tt_common; |
3867 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3868 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3869 | struct hlist_head *head; |
3870 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3871 | u32 i; |
058d0e26 AQ |
3872 | |
3873 | if (!hash) | |
3874 | return; | |
3875 | ||
3876 | for (i = 0; i < hash->size; i++) { | |
3877 | head = &hash->table[i]; | |
3878 | list_lock = &hash->list_locks[i]; | |
3879 | ||
3880 | spin_lock_bh(list_lock); | |
b67bfe0d | 3881 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3882 | hash_entry) { |
3883 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3884 | continue; |
3885 | ||
39c75a51 | 3886 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3887 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3888 | tt_common->addr, | |
f7a2bd65 | 3889 | batadv_print_vid(tt_common->vid)); |
058d0e26 | 3890 | |
7ea7b4a1 | 3891 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3892 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3893 | tt_local = container_of(tt_common, |
3894 | struct batadv_tt_local_entry, | |
3895 | common); | |
35df3b29 | 3896 | |
95c0db90 | 3897 | batadv_tt_local_entry_put(tt_local); |
058d0e26 AQ |
3898 | } |
3899 | spin_unlock_bh(list_lock); | |
3900 | } | |
058d0e26 AQ |
3901 | } |
3902 | ||
e1bf0c14 | 3903 | /** |
7e9a8c2c | 3904 | * batadv_tt_local_commit_changes_nolock() - commit all pending local tt changes |
a19d3d85 | 3905 | * which have been queued in the time since the last commit |
e1bf0c14 | 3906 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3907 | * |
3908 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3909 | */ |
a19d3d85 | 3910 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3911 | { |
5274cd68 SE |
3912 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3913 | ||
e1bf0c14 ML |
3914 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3915 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3916 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3917 | return; |
e1bf0c14 | 3918 | } |
be9aa4c1 | 3919 | |
7ea7b4a1 | 3920 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3921 | |
a513088d | 3922 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3923 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3924 | |
3925 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3926 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3927 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3928 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3929 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3930 | |
3931 | /* reset the sending counter */ | |
807736f6 | 3932 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3933 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3934 | } |
a70a9aa9 | 3935 | |
a19d3d85 | 3936 | /** |
7e9a8c2c | 3937 | * batadv_tt_local_commit_changes() - commit all pending local tt changes which |
a19d3d85 ML |
3938 | * have been queued in the time since the last commit |
3939 | * @bat_priv: the bat priv with all the soft interface information | |
3940 | */ | |
3941 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3942 | { | |
3943 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3944 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3945 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3946 | } |
59b699cd | 3947 | |
ff15c27c SE |
3948 | /** |
3949 | * batadv_is_ap_isolated() - Check if packet from upper layer should be dropped | |
3950 | * @bat_priv: the bat priv with all the soft interface information | |
3951 | * @src: source mac address of packet | |
3952 | * @dst: destination mac address of packet | |
3953 | * @vid: vlan id of packet | |
3954 | * | |
3955 | * Return: true when src+dst(+vid) pair should be isolated, false otherwise | |
3956 | */ | |
6b5e971a SE |
3957 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3958 | unsigned short vid) | |
59b699cd | 3959 | { |
393b299d ME |
3960 | struct batadv_tt_local_entry *tt_local_entry; |
3961 | struct batadv_tt_global_entry *tt_global_entry; | |
b8cbd81d | 3962 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3963 | bool ret = false; |
59b699cd | 3964 | |
b8cbd81d | 3965 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3966 | if (!vlan) |
3967 | return false; | |
3968 | ||
3969 | if (!atomic_read(&vlan->ap_isolation)) | |
393b299d | 3970 | goto vlan_put; |
59b699cd | 3971 | |
b8cbd81d | 3972 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd | 3973 | if (!tt_local_entry) |
393b299d | 3974 | goto vlan_put; |
59b699cd | 3975 | |
b8cbd81d | 3976 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd | 3977 | if (!tt_global_entry) |
393b299d | 3978 | goto local_entry_put; |
59b699cd | 3979 | |
393b299d ME |
3980 | if (_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
3981 | ret = true; | |
59b699cd | 3982 | |
393b299d ME |
3983 | batadv_tt_global_entry_put(tt_global_entry); |
3984 | local_entry_put: | |
3985 | batadv_tt_local_entry_put(tt_local_entry); | |
3986 | vlan_put: | |
9c3bf081 | 3987 | batadv_softif_vlan_put(vlan); |
59b699cd AQ |
3988 | return ret; |
3989 | } | |
a943cac1 | 3990 | |
e1bf0c14 | 3991 | /** |
7e9a8c2c | 3992 | * batadv_tt_update_orig() - update global translation table with new tt |
e1bf0c14 ML |
3993 | * information received via ogms |
3994 | * @bat_priv: the bat priv with all the soft interface information | |
e51f0397 SE |
3995 | * @orig_node: the orig_node of the ogm |
3996 | * @tt_buff: pointer to the first tvlv VLAN entry | |
7ea7b4a1 AQ |
3997 | * @tt_num_vlan: number of tvlv VLAN entries |
3998 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3999 | * @tt_num_changes: number of tt changes inside the tt buffer |
4000 | * @ttvn: translation table version number of this changeset | |
e1bf0c14 ML |
4001 | */ |
4002 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
4003 | struct batadv_orig_node *orig_node, | |
6b5e971a | 4004 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 4005 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 4006 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 4007 | { |
6b5e971a | 4008 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 4009 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 4010 | bool full_table = true; |
e17931d1 | 4011 | bool has_tt_init; |
a943cac1 | 4012 | |
7ea7b4a1 | 4013 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
4014 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
4015 | &orig_node->capa_initialized); | |
e17931d1 | 4016 | |
17071578 | 4017 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
4018 | * increased by one -> we can apply the attached changes |
4019 | */ | |
e17931d1 | 4020 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 4021 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
4022 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
4023 | * times. | |
9cfc7bd6 SE |
4024 | * In this case send a tt request |
4025 | */ | |
a943cac1 ML |
4026 | if (!tt_num_changes) { |
4027 | full_table = false; | |
4028 | goto request_table; | |
4029 | } | |
4030 | ||
a70a9aa9 AQ |
4031 | spin_lock_bh(&orig_node->tt_lock); |
4032 | ||
a513088d | 4033 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 4034 | ttvn, tt_change); |
a943cac1 ML |
4035 | |
4036 | /* Even if we received the precomputed crc with the OGM, we | |
4037 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
4038 | * in the global table |
4039 | */ | |
7ea7b4a1 | 4040 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 4041 | |
a70a9aa9 AQ |
4042 | spin_unlock_bh(&orig_node->tt_lock); |
4043 | ||
a943cac1 ML |
4044 | /* The ttvn alone is not enough to guarantee consistency |
4045 | * because a single value could represent different states | |
4046 | * (due to the wrap around). Thus a node has to check whether | |
4047 | * the resulting table (after applying the changes) is still | |
4048 | * consistent or not. E.g. a node could disconnect while its | |
4049 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
4050 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
4051 | * inconsistency |
4052 | */ | |
7ea7b4a1 AQ |
4053 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
4054 | tt_num_vlan)) | |
a943cac1 | 4055 | goto request_table; |
a943cac1 ML |
4056 | } else { |
4057 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
4058 | * in sync anymore -> request fresh tt data |
4059 | */ | |
e17931d1 | 4060 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
4061 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
4062 | tt_num_vlan)) { | |
a943cac1 | 4063 | request_table: |
39c75a51 | 4064 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
4065 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
4066 | orig_node->orig, ttvn, orig_ttvn, | |
4067 | tt_num_changes); | |
a513088d | 4068 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
4069 | tt_vlan, tt_num_vlan, |
4070 | full_table); | |
a943cac1 ML |
4071 | return; |
4072 | } | |
4073 | } | |
4074 | } | |
3275e7cc | 4075 | |
c018ad3d | 4076 | /** |
7e9a8c2c | 4077 | * batadv_tt_global_client_is_roaming() - check if a client is marked as roaming |
c018ad3d AQ |
4078 | * @bat_priv: the bat priv with all the soft interface information |
4079 | * @addr: the mac address of the client to check | |
4080 | * @vid: VLAN identifier | |
4081 | * | |
62fe710f | 4082 | * Return: true if we know that the client has moved from its old originator |
c018ad3d AQ |
4083 | * to another one. This entry is still kept for consistency purposes and will be |
4084 | * deleted later by a DEL or because of timeout | |
3275e7cc | 4085 | */ |
56303d34 | 4086 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 4087 | u8 *addr, unsigned short vid) |
3275e7cc | 4088 | { |
56303d34 | 4089 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
4090 | bool ret = false; |
4091 | ||
c018ad3d | 4092 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
4093 | if (!tt_global_entry) |
4094 | goto out; | |
4095 | ||
c1d07431 | 4096 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
5dafd8a6 | 4097 | batadv_tt_global_entry_put(tt_global_entry); |
3275e7cc AQ |
4098 | out: |
4099 | return ret; | |
4100 | } | |
30cfd02b | 4101 | |
7c1fd91d | 4102 | /** |
7e9a8c2c | 4103 | * batadv_tt_local_client_is_roaming() - tells whether the client is roaming |
7c1fd91d | 4104 | * @bat_priv: the bat priv with all the soft interface information |
c018ad3d AQ |
4105 | * @addr: the mac address of the local client to query |
4106 | * @vid: VLAN identifier | |
7c1fd91d | 4107 | * |
62fe710f | 4108 | * Return: true if the local client is known to be roaming (it is not served by |
7c1fd91d AQ |
4109 | * this node anymore) or not. If yes, the client is still present in the table |
4110 | * to keep the latter consistent with the node TTVN | |
4111 | */ | |
4112 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 4113 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
4114 | { |
4115 | struct batadv_tt_local_entry *tt_local_entry; | |
4116 | bool ret = false; | |
4117 | ||
c018ad3d | 4118 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
4119 | if (!tt_local_entry) |
4120 | goto out; | |
4121 | ||
4122 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
95c0db90 | 4123 | batadv_tt_local_entry_put(tt_local_entry); |
7c1fd91d AQ |
4124 | out: |
4125 | return ret; | |
7c1fd91d AQ |
4126 | } |
4127 | ||
ff15c27c SE |
4128 | /** |
4129 | * batadv_tt_add_temporary_global_entry() - Add temporary entry to global TT | |
4130 | * @bat_priv: the bat priv with all the soft interface information | |
4131 | * @orig_node: orig node which the temporary entry should be associated with | |
4132 | * @addr: mac address of the client | |
4133 | * @vid: VLAN id of the new temporary global translation table | |
4134 | * | |
4135 | * Return: true when temporary tt entry could be added, false otherwise | |
4136 | */ | |
30cfd02b AQ |
4137 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
4138 | struct batadv_orig_node *orig_node, | |
c018ad3d | 4139 | const unsigned char *addr, |
16052789 | 4140 | unsigned short vid) |
30cfd02b | 4141 | { |
1227c9ae SW |
4142 | /* ignore loop detect macs, they are not supposed to be in the tt local |
4143 | * data as well. | |
4144 | */ | |
4145 | if (batadv_bla_is_loopdetect_mac(addr)) | |
4146 | return false; | |
4147 | ||
16052789 | 4148 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
4149 | BATADV_TT_CLIENT_TEMP, |
4150 | atomic_read(&orig_node->last_ttvn))) | |
75ae84a4 | 4151 | return false; |
30cfd02b AQ |
4152 | |
4153 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 | 4154 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
f7a2bd65 | 4155 | addr, batadv_print_vid(vid), orig_node->orig); |
75ae84a4 SW |
4156 | |
4157 | return true; | |
30cfd02b | 4158 | } |
e1bf0c14 | 4159 | |
a19d3d85 | 4160 | /** |
7e9a8c2c | 4161 | * batadv_tt_local_resize_to_mtu() - resize the local translation table fit the |
a19d3d85 ML |
4162 | * maximum packet size that can be transported through the mesh |
4163 | * @soft_iface: netdev struct of the mesh interface | |
4164 | * | |
4165 | * Remove entries older than 'timeout' and half timeout if more entries need | |
4166 | * to be removed. | |
4167 | */ | |
4168 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
4169 | { | |
4170 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
4171 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
4172 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
4173 | bool reduced = false; | |
4174 | ||
4175 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
4176 | ||
4177 | while (true) { | |
4178 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
4179 | if (packet_size_max >= table_size) | |
4180 | break; | |
4181 | ||
4182 | batadv_tt_local_purge(bat_priv, timeout); | |
4183 | batadv_tt_local_purge_pending_clients(bat_priv); | |
4184 | ||
4185 | timeout /= 2; | |
4186 | reduced = true; | |
4187 | net_ratelimited_function(batadv_info, soft_iface, | |
4188 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
4189 | packet_size_max); | |
4190 | } | |
4191 | ||
4192 | /* commit these changes immediately, to avoid synchronization problem | |
4193 | * with the TTVN | |
4194 | */ | |
4195 | if (reduced) | |
4196 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
4197 | ||
4198 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
4199 | } | |
4200 | ||
e1bf0c14 | 4201 | /** |
7e9a8c2c | 4202 | * batadv_tt_tvlv_ogm_handler_v1() - process incoming tt tvlv container |
e1bf0c14 ML |
4203 | * @bat_priv: the bat priv with all the soft interface information |
4204 | * @orig: the orig_node of the ogm | |
4205 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
4206 | * @tvlv_value: tvlv buffer containing the gateway data | |
4207 | * @tvlv_value_len: tvlv buffer length | |
4208 | */ | |
4209 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
4210 | struct batadv_orig_node *orig, | |
6b5e971a SE |
4211 | u8 flags, void *tvlv_value, |
4212 | u16 tvlv_value_len) | |
e1bf0c14 | 4213 | { |
7ea7b4a1 AQ |
4214 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
4215 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 4216 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 4217 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
4218 | |
4219 | if (tvlv_value_len < sizeof(*tt_data)) | |
4220 | return; | |
4221 | ||
4222 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
4223 | tvlv_value_len -= sizeof(*tt_data); | |
4224 | ||
7ea7b4a1 AQ |
4225 | num_vlan = ntohs(tt_data->num_vlan); |
4226 | ||
4227 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
4228 | return; | |
4229 | ||
4230 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
4231 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
4232 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
4233 | ||
298e6e68 | 4234 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 4235 | |
7ea7b4a1 AQ |
4236 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
4237 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
4238 | } |
4239 | ||
335fbe0f | 4240 | /** |
7e9a8c2c | 4241 | * batadv_tt_tvlv_unicast_handler_v1() - process incoming (unicast) tt tvlv |
335fbe0f ML |
4242 | * container |
4243 | * @bat_priv: the bat priv with all the soft interface information | |
4244 | * @src: mac address of tt tvlv sender | |
4245 | * @dst: mac address of tt tvlv recipient | |
4246 | * @tvlv_value: tvlv buffer containing the tt data | |
4247 | * @tvlv_value_len: tvlv buffer length | |
4248 | * | |
62fe710f | 4249 | * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS |
335fbe0f ML |
4250 | * otherwise. |
4251 | */ | |
4252 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 4253 | u8 *src, u8 *dst, |
335fbe0f | 4254 | void *tvlv_value, |
6b5e971a | 4255 | u16 tvlv_value_len) |
335fbe0f ML |
4256 | { |
4257 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 4258 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
4259 | char tt_flag; |
4260 | bool ret; | |
4261 | ||
4262 | if (tvlv_value_len < sizeof(*tt_data)) | |
4263 | return NET_RX_SUCCESS; | |
4264 | ||
4265 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
4266 | tvlv_value_len -= sizeof(*tt_data); | |
4267 | ||
7ea7b4a1 AQ |
4268 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
4269 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
4270 | ||
4271 | if (tvlv_value_len < tt_vlan_len) | |
4272 | return NET_RX_SUCCESS; | |
4273 | ||
4274 | tvlv_value_len -= tt_vlan_len; | |
4275 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
4276 | |
4277 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
4278 | case BATADV_TT_REQUEST: | |
4279 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
4280 | ||
4281 | /* If this node cannot provide a TT response the tt_request is | |
4282 | * forwarded | |
4283 | */ | |
4284 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
4285 | if (!ret) { | |
4286 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
4287 | tt_flag = 'F'; | |
4288 | else | |
4289 | tt_flag = '.'; | |
4290 | ||
4291 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4292 | "Routing TT_REQUEST to %pM [%c]\n", | |
4293 | dst, tt_flag); | |
4294 | /* tvlv API will re-route the packet */ | |
4295 | return NET_RX_DROP; | |
4296 | } | |
4297 | break; | |
4298 | case BATADV_TT_RESPONSE: | |
4299 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
4300 | ||
4301 | if (batadv_is_my_mac(bat_priv, dst)) { | |
4302 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 4303 | src, tt_num_entries); |
335fbe0f ML |
4304 | return NET_RX_SUCCESS; |
4305 | } | |
4306 | ||
4307 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
4308 | tt_flag = 'F'; | |
4309 | else | |
4310 | tt_flag = '.'; | |
4311 | ||
4312 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4313 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
4314 | ||
4315 | /* tvlv API will re-route the packet */ | |
4316 | return NET_RX_DROP; | |
4317 | } | |
4318 | ||
4319 | return NET_RX_SUCCESS; | |
4320 | } | |
4321 | ||
122edaa0 | 4322 | /** |
7e9a8c2c SE |
4323 | * batadv_roam_tvlv_unicast_handler_v1() - process incoming tt roam tvlv |
4324 | * container | |
122edaa0 ML |
4325 | * @bat_priv: the bat priv with all the soft interface information |
4326 | * @src: mac address of tt tvlv sender | |
4327 | * @dst: mac address of tt tvlv recipient | |
4328 | * @tvlv_value: tvlv buffer containing the tt data | |
4329 | * @tvlv_value_len: tvlv buffer length | |
4330 | * | |
62fe710f | 4331 | * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS |
122edaa0 ML |
4332 | * otherwise. |
4333 | */ | |
4334 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 4335 | u8 *src, u8 *dst, |
122edaa0 | 4336 | void *tvlv_value, |
6b5e971a | 4337 | u16 tvlv_value_len) |
122edaa0 ML |
4338 | { |
4339 | struct batadv_tvlv_roam_adv *roaming_adv; | |
4340 | struct batadv_orig_node *orig_node = NULL; | |
4341 | ||
4342 | /* If this node is not the intended recipient of the | |
4343 | * roaming advertisement the packet is forwarded | |
4344 | * (the tvlv API will re-route the packet). | |
4345 | */ | |
4346 | if (!batadv_is_my_mac(bat_priv, dst)) | |
4347 | return NET_RX_DROP; | |
4348 | ||
122edaa0 ML |
4349 | if (tvlv_value_len < sizeof(*roaming_adv)) |
4350 | goto out; | |
4351 | ||
4352 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
4353 | if (!orig_node) | |
4354 | goto out; | |
4355 | ||
4356 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
4357 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
4358 | ||
4359 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4360 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
4361 | src, roaming_adv->client); | |
4362 | ||
4363 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 4364 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
4365 | atomic_read(&orig_node->last_ttvn) + 1); |
4366 | ||
4367 | out: | |
4368 | if (orig_node) | |
5d967310 | 4369 | batadv_orig_node_put(orig_node); |
122edaa0 ML |
4370 | return NET_RX_SUCCESS; |
4371 | } | |
4372 | ||
e1bf0c14 | 4373 | /** |
7e9a8c2c | 4374 | * batadv_tt_init() - initialise the translation table internals |
e1bf0c14 ML |
4375 | * @bat_priv: the bat priv with all the soft interface information |
4376 | * | |
62fe710f | 4377 | * Return: 0 on success or negative error number in case of failure. |
e1bf0c14 ML |
4378 | */ |
4379 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
4380 | { | |
4381 | int ret; | |
4382 | ||
0eb01568 AQ |
4383 | /* synchronized flags must be remote */ |
4384 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
4385 | ||
e1bf0c14 ML |
4386 | ret = batadv_tt_local_init(bat_priv); |
4387 | if (ret < 0) | |
4388 | return ret; | |
4389 | ||
4390 | ret = batadv_tt_global_init(bat_priv); | |
4391 | if (ret < 0) | |
4392 | return ret; | |
4393 | ||
4394 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
4395 | batadv_tt_tvlv_unicast_handler_v1, |
4396 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 4397 | |
122edaa0 ML |
4398 | batadv_tvlv_handler_register(bat_priv, NULL, |
4399 | batadv_roam_tvlv_unicast_handler_v1, | |
4400 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
4401 | ||
e1bf0c14 ML |
4402 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
4403 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
4404 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
4405 | ||
4406 | return 1; | |
4407 | } | |
42cb0bef AQ |
4408 | |
4409 | /** | |
7e9a8c2c | 4410 | * batadv_tt_global_is_isolated() - check if a client is marked as isolated |
42cb0bef AQ |
4411 | * @bat_priv: the bat priv with all the soft interface information |
4412 | * @addr: the mac address of the client | |
4413 | * @vid: the identifier of the VLAN where this client is connected | |
4414 | * | |
62fe710f | 4415 | * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false |
42cb0bef AQ |
4416 | * otherwise |
4417 | */ | |
4418 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 4419 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
4420 | { |
4421 | struct batadv_tt_global_entry *tt; | |
4422 | bool ret; | |
4423 | ||
4424 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
4425 | if (!tt) | |
4426 | return false; | |
4427 | ||
4428 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
4429 | ||
5dafd8a6 | 4430 | batadv_tt_global_entry_put(tt); |
42cb0bef AQ |
4431 | |
4432 | return ret; | |
4433 | } | |
86452f81 SE |
4434 | |
4435 | /** | |
7e9a8c2c | 4436 | * batadv_tt_cache_init() - Initialize tt memory object cache |
86452f81 SE |
4437 | * |
4438 | * Return: 0 on success or negative error number in case of failure. | |
4439 | */ | |
4440 | int __init batadv_tt_cache_init(void) | |
4441 | { | |
4442 | size_t tl_size = sizeof(struct batadv_tt_local_entry); | |
4443 | size_t tg_size = sizeof(struct batadv_tt_global_entry); | |
4444 | size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry); | |
4445 | size_t tt_change_size = sizeof(struct batadv_tt_change_node); | |
4446 | size_t tt_req_size = sizeof(struct batadv_tt_req_node); | |
4447 | size_t tt_roam_size = sizeof(struct batadv_tt_roam_node); | |
4448 | ||
4449 | batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0, | |
4450 | SLAB_HWCACHE_ALIGN, NULL); | |
4451 | if (!batadv_tl_cache) | |
4452 | return -ENOMEM; | |
4453 | ||
4454 | batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0, | |
4455 | SLAB_HWCACHE_ALIGN, NULL); | |
4456 | if (!batadv_tg_cache) | |
4457 | goto err_tt_tl_destroy; | |
4458 | ||
4459 | batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache", | |
4460 | tt_orig_size, 0, | |
4461 | SLAB_HWCACHE_ALIGN, NULL); | |
4462 | if (!batadv_tt_orig_cache) | |
4463 | goto err_tt_tg_destroy; | |
4464 | ||
4465 | batadv_tt_change_cache = kmem_cache_create("batadv_tt_change_cache", | |
4466 | tt_change_size, 0, | |
4467 | SLAB_HWCACHE_ALIGN, NULL); | |
4468 | if (!batadv_tt_change_cache) | |
4469 | goto err_tt_orig_destroy; | |
4470 | ||
4471 | batadv_tt_req_cache = kmem_cache_create("batadv_tt_req_cache", | |
4472 | tt_req_size, 0, | |
4473 | SLAB_HWCACHE_ALIGN, NULL); | |
4474 | if (!batadv_tt_req_cache) | |
4475 | goto err_tt_change_destroy; | |
4476 | ||
4477 | batadv_tt_roam_cache = kmem_cache_create("batadv_tt_roam_cache", | |
4478 | tt_roam_size, 0, | |
4479 | SLAB_HWCACHE_ALIGN, NULL); | |
4480 | if (!batadv_tt_roam_cache) | |
4481 | goto err_tt_req_destroy; | |
4482 | ||
4483 | return 0; | |
4484 | ||
4485 | err_tt_req_destroy: | |
4486 | kmem_cache_destroy(batadv_tt_req_cache); | |
4487 | batadv_tt_req_cache = NULL; | |
4488 | err_tt_change_destroy: | |
4489 | kmem_cache_destroy(batadv_tt_change_cache); | |
4490 | batadv_tt_change_cache = NULL; | |
4491 | err_tt_orig_destroy: | |
4492 | kmem_cache_destroy(batadv_tt_orig_cache); | |
4493 | batadv_tt_orig_cache = NULL; | |
4494 | err_tt_tg_destroy: | |
4495 | kmem_cache_destroy(batadv_tg_cache); | |
4496 | batadv_tg_cache = NULL; | |
4497 | err_tt_tl_destroy: | |
4498 | kmem_cache_destroy(batadv_tl_cache); | |
4499 | batadv_tl_cache = NULL; | |
4500 | ||
4501 | return -ENOMEM; | |
4502 | } | |
4503 | ||
4504 | /** | |
7e9a8c2c | 4505 | * batadv_tt_cache_destroy() - Destroy tt memory object cache |
86452f81 SE |
4506 | */ |
4507 | void batadv_tt_cache_destroy(void) | |
4508 | { | |
4509 | kmem_cache_destroy(batadv_tl_cache); | |
4510 | kmem_cache_destroy(batadv_tg_cache); | |
4511 | kmem_cache_destroy(batadv_tt_orig_cache); | |
4512 | kmem_cache_destroy(batadv_tt_change_cache); | |
4513 | kmem_cache_destroy(batadv_tt_req_cache); | |
4514 | kmem_cache_destroy(batadv_tt_roam_cache); | |
4515 | } |