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