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0046b040 | 1 | /* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
c6c8fea2 | 18 | #include "translation-table.h" |
1e2c2a4f SE |
19 | #include "main.h" |
20 | ||
21 | #include <linux/atomic.h> | |
ac4eebd4 | 22 | #include <linux/bitops.h> |
1e2c2a4f SE |
23 | #include <linux/bug.h> |
24 | #include <linux/byteorder/generic.h> | |
86452f81 | 25 | #include <linux/cache.h> |
1e2c2a4f SE |
26 | #include <linux/compiler.h> |
27 | #include <linux/crc32c.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/etherdevice.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/if_ether.h> | |
86452f81 | 32 | #include <linux/init.h> |
1e2c2a4f SE |
33 | #include <linux/jhash.h> |
34 | #include <linux/jiffies.h> | |
35 | #include <linux/kernel.h> | |
6e8ef69d | 36 | #include <linux/kref.h> |
1e2c2a4f SE |
37 | #include <linux/list.h> |
38 | #include <linux/lockdep.h> | |
39 | #include <linux/netdevice.h> | |
d34f0550 | 40 | #include <linux/netlink.h> |
1e2c2a4f SE |
41 | #include <linux/rculist.h> |
42 | #include <linux/rcupdate.h> | |
43 | #include <linux/seq_file.h> | |
d34f0550 | 44 | #include <linux/skbuff.h> |
1e2c2a4f SE |
45 | #include <linux/slab.h> |
46 | #include <linux/spinlock.h> | |
47 | #include <linux/stddef.h> | |
48 | #include <linux/string.h> | |
49 | #include <linux/workqueue.h> | |
d34f0550 MS |
50 | #include <net/genetlink.h> |
51 | #include <net/netlink.h> | |
52 | #include <net/sock.h> | |
53 | #include <uapi/linux/batman_adv.h> | |
1e2c2a4f SE |
54 | |
55 | #include "bridge_loop_avoidance.h" | |
32ae9b22 | 56 | #include "hard-interface.h" |
c6c8fea2 | 57 | #include "hash.h" |
ba412080 | 58 | #include "log.h" |
c5caf4ef | 59 | #include "multicast.h" |
d34f0550 | 60 | #include "netlink.h" |
1e2c2a4f SE |
61 | #include "originator.h" |
62 | #include "packet.h" | |
63 | #include "soft-interface.h" | |
1f8dce49 | 64 | #include "tvlv.h" |
a73105b8 | 65 | |
86452f81 SE |
66 | static struct kmem_cache *batadv_tl_cache __read_mostly; |
67 | static struct kmem_cache *batadv_tg_cache __read_mostly; | |
68 | static struct kmem_cache *batadv_tt_orig_cache __read_mostly; | |
69 | static struct kmem_cache *batadv_tt_change_cache __read_mostly; | |
70 | static struct kmem_cache *batadv_tt_req_cache __read_mostly; | |
71 | static struct kmem_cache *batadv_tt_roam_cache __read_mostly; | |
72 | ||
dec05074 AQ |
73 | /* hash class keys */ |
74 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
75 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
76 | ||
6b5e971a | 77 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 78 | unsigned short vid, |
56303d34 | 79 | struct batadv_orig_node *orig_node); |
a513088d SE |
80 | static void batadv_tt_purge(struct work_struct *work); |
81 | static void | |
56303d34 | 82 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
83 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
84 | struct batadv_orig_node *orig_node, | |
85 | const unsigned char *addr, | |
c018ad3d AQ |
86 | unsigned short vid, const char *message, |
87 | bool roaming); | |
c6c8fea2 | 88 | |
62fe710f | 89 | /** |
d15cd622 AQ |
90 | * batadv_compare_tt - check if two TT entries are the same |
91 | * @node: the list element pointer of the first TT entry | |
92 | * @data2: pointer to the tt_common_entry of the second TT entry | |
62fe710f | 93 | * |
d15cd622 AQ |
94 | * Compare the MAC address and the VLAN ID of the two TT entries and check if |
95 | * they are the same TT client. | |
4b426b10 | 96 | * Return: true if the two TT clients are the same, false otherwise |
62fe710f | 97 | */ |
4b426b10 | 98 | static bool batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 99 | { |
56303d34 | 100 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 101 | hash_entry); |
4c718958 ML |
102 | const struct batadv_tt_common_entry *tt1 = data1; |
103 | const struct batadv_tt_common_entry *tt2 = data2; | |
7aadf889 | 104 | |
4c718958 | 105 | return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2); |
7aadf889 ML |
106 | } |
107 | ||
c018ad3d AQ |
108 | /** |
109 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
110 | * @data: pointer to the tt_common_entry object to map | |
111 | * @size: the size of the hash table | |
112 | * | |
62fe710f | 113 | * Return: the hash index where the object represented by 'data' should be |
c018ad3d AQ |
114 | * stored at. |
115 | */ | |
6b5e971a | 116 | static inline u32 batadv_choose_tt(const void *data, u32 size) |
c018ad3d AQ |
117 | { |
118 | struct batadv_tt_common_entry *tt; | |
6b5e971a | 119 | u32 hash = 0; |
c018ad3d AQ |
120 | |
121 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
122 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
123 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
124 | |
125 | return hash % size; | |
126 | } | |
127 | ||
128 | /** | |
129 | * batadv_tt_hash_find - look for a client in the given hash table | |
130 | * @hash: the hash table to search | |
131 | * @addr: the mac address of the client to look for | |
132 | * @vid: VLAN identifier | |
133 | * | |
62fe710f | 134 | * Return: a pointer to the tt_common struct belonging to the searched client if |
c018ad3d AQ |
135 | * found, NULL otherwise. |
136 | */ | |
56303d34 | 137 | static struct batadv_tt_common_entry * |
6b5e971a | 138 | batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr, |
c018ad3d | 139 | unsigned short vid) |
7aadf889 | 140 | { |
7aadf889 | 141 | struct hlist_head *head; |
c018ad3d | 142 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
6b5e971a | 143 | u32 index; |
7aadf889 ML |
144 | |
145 | if (!hash) | |
146 | return NULL; | |
147 | ||
8fdd0153 | 148 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
149 | to_search.vid = vid; |
150 | ||
151 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
152 | head = &hash->table[index]; |
153 | ||
154 | rcu_read_lock(); | |
c018ad3d AQ |
155 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
156 | if (!batadv_compare_eth(tt, addr)) | |
157 | continue; | |
158 | ||
159 | if (tt->vid != vid) | |
7aadf889 ML |
160 | continue; |
161 | ||
92dcdf09 | 162 | if (!kref_get_unless_zero(&tt->refcount)) |
7683fdc1 AQ |
163 | continue; |
164 | ||
c018ad3d | 165 | tt_tmp = tt; |
7aadf889 ML |
166 | break; |
167 | } | |
168 | rcu_read_unlock(); | |
169 | ||
c018ad3d | 170 | return tt_tmp; |
7aadf889 ML |
171 | } |
172 | ||
c018ad3d AQ |
173 | /** |
174 | * batadv_tt_local_hash_find - search the local table for a given client | |
175 | * @bat_priv: the bat priv with all the soft interface information | |
176 | * @addr: the mac address of the client to look for | |
177 | * @vid: VLAN identifier | |
178 | * | |
62fe710f | 179 | * Return: a pointer to the corresponding tt_local_entry struct if the client is |
c018ad3d AQ |
180 | * found, NULL otherwise. |
181 | */ | |
56303d34 | 182 | static struct batadv_tt_local_entry * |
6b5e971a | 183 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 184 | unsigned short vid) |
7aadf889 | 185 | { |
56303d34 SE |
186 | struct batadv_tt_common_entry *tt_common_entry; |
187 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 188 | |
c018ad3d AQ |
189 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
190 | vid); | |
48100bac AQ |
191 | if (tt_common_entry) |
192 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
193 | struct batadv_tt_local_entry, |
194 | common); | |
48100bac AQ |
195 | return tt_local_entry; |
196 | } | |
7aadf889 | 197 | |
c018ad3d AQ |
198 | /** |
199 | * batadv_tt_global_hash_find - search the global table for a given client | |
200 | * @bat_priv: the bat priv with all the soft interface information | |
201 | * @addr: the mac address of the client to look for | |
202 | * @vid: VLAN identifier | |
203 | * | |
62fe710f | 204 | * Return: a pointer to the corresponding tt_global_entry struct if the client |
c018ad3d AQ |
205 | * is found, NULL otherwise. |
206 | */ | |
56303d34 | 207 | static struct batadv_tt_global_entry * |
6b5e971a | 208 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 209 | unsigned short vid) |
48100bac | 210 | { |
56303d34 SE |
211 | struct batadv_tt_common_entry *tt_common_entry; |
212 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 213 | |
c018ad3d AQ |
214 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
215 | vid); | |
48100bac AQ |
216 | if (tt_common_entry) |
217 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
218 | struct batadv_tt_global_entry, |
219 | common); | |
48100bac | 220 | return tt_global_entry; |
7aadf889 ML |
221 | } |
222 | ||
86452f81 SE |
223 | /** |
224 | * batadv_tt_local_entry_free_rcu - free the tt_local_entry | |
225 | * @rcu: rcu pointer of the tt_local_entry | |
226 | */ | |
227 | static void batadv_tt_local_entry_free_rcu(struct rcu_head *rcu) | |
228 | { | |
229 | struct batadv_tt_local_entry *tt_local_entry; | |
230 | ||
231 | tt_local_entry = container_of(rcu, struct batadv_tt_local_entry, | |
232 | common.rcu); | |
233 | ||
234 | kmem_cache_free(batadv_tl_cache, tt_local_entry); | |
235 | } | |
236 | ||
92dcdf09 SE |
237 | /** |
238 | * batadv_tt_local_entry_release - release tt_local_entry from lists and queue | |
239 | * for free after rcu grace period | |
240 | * @ref: kref pointer of the nc_node | |
241 | */ | |
242 | static void batadv_tt_local_entry_release(struct kref *ref) | |
243 | { | |
244 | struct batadv_tt_local_entry *tt_local_entry; | |
245 | ||
246 | tt_local_entry = container_of(ref, struct batadv_tt_local_entry, | |
247 | common.refcount); | |
248 | ||
a33d970d SE |
249 | batadv_softif_vlan_put(tt_local_entry->vlan); |
250 | ||
86452f81 | 251 | call_rcu(&tt_local_entry->common.rcu, batadv_tt_local_entry_free_rcu); |
92dcdf09 SE |
252 | } |
253 | ||
254 | /** | |
95c0db90 | 255 | * batadv_tt_local_entry_put - decrement the tt_local_entry refcounter and |
92dcdf09 SE |
256 | * possibly release it |
257 | * @tt_local_entry: tt_local_entry to be free'd | |
258 | */ | |
a513088d | 259 | static void |
95c0db90 | 260 | batadv_tt_local_entry_put(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 261 | { |
92dcdf09 SE |
262 | kref_put(&tt_local_entry->common.refcount, |
263 | batadv_tt_local_entry_release); | |
7683fdc1 AQ |
264 | } |
265 | ||
86452f81 SE |
266 | /** |
267 | * batadv_tt_global_entry_free_rcu - free the tt_global_entry | |
268 | * @rcu: rcu pointer of the tt_global_entry | |
269 | */ | |
270 | static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu) | |
271 | { | |
272 | struct batadv_tt_global_entry *tt_global_entry; | |
273 | ||
274 | tt_global_entry = container_of(rcu, struct batadv_tt_global_entry, | |
275 | common.rcu); | |
276 | ||
277 | kmem_cache_free(batadv_tg_cache, tt_global_entry); | |
278 | } | |
279 | ||
21026059 | 280 | /** |
92dcdf09 SE |
281 | * batadv_tt_global_entry_release - release tt_global_entry from lists and queue |
282 | * for free after rcu grace period | |
283 | * @ref: kref pointer of the nc_node | |
284 | */ | |
285 | static void batadv_tt_global_entry_release(struct kref *ref) | |
286 | { | |
287 | struct batadv_tt_global_entry *tt_global_entry; | |
288 | ||
289 | tt_global_entry = container_of(ref, struct batadv_tt_global_entry, | |
290 | common.refcount); | |
291 | ||
292 | batadv_tt_global_del_orig_list(tt_global_entry); | |
86452f81 SE |
293 | |
294 | call_rcu(&tt_global_entry->common.rcu, batadv_tt_global_entry_free_rcu); | |
92dcdf09 SE |
295 | } |
296 | ||
297 | /** | |
5dafd8a6 SE |
298 | * batadv_tt_global_entry_put - decrement the tt_global_entry refcounter and |
299 | * possibly release it | |
92dcdf09 | 300 | * @tt_global_entry: tt_global_entry to be free'd |
21026059 | 301 | */ |
a513088d | 302 | static void |
5dafd8a6 | 303 | batadv_tt_global_entry_put(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 304 | { |
92dcdf09 SE |
305 | kref_put(&tt_global_entry->common.refcount, |
306 | batadv_tt_global_entry_release); | |
db08e6e5 SW |
307 | } |
308 | ||
1d8ab8d3 LL |
309 | /** |
310 | * batadv_tt_global_hash_count - count the number of orig entries | |
d15cd622 | 311 | * @bat_priv: the bat priv with all the soft interface information |
1d8ab8d3 LL |
312 | * @addr: the mac address of the client to count entries for |
313 | * @vid: VLAN identifier | |
314 | * | |
62fe710f | 315 | * Return: the number of originators advertising the given address/data |
1d8ab8d3 LL |
316 | * (excluding ourself). |
317 | */ | |
318 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 319 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
320 | { |
321 | struct batadv_tt_global_entry *tt_global_entry; | |
322 | int count; | |
323 | ||
324 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
325 | if (!tt_global_entry) | |
326 | return 0; | |
327 | ||
328 | count = atomic_read(&tt_global_entry->orig_list_count); | |
5dafd8a6 | 329 | batadv_tt_global_entry_put(tt_global_entry); |
1d8ab8d3 LL |
330 | |
331 | return count; | |
332 | } | |
333 | ||
7ea7b4a1 AQ |
334 | /** |
335 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
336 | * by vid | |
337 | * @bat_priv: the bat priv with all the soft interface information | |
338 | * @vid: the VLAN identifier of the sub-table to change | |
339 | * @v: the amount to sum to the local table size | |
340 | */ | |
341 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
342 | unsigned short vid, int v) | |
343 | { | |
344 | struct batadv_softif_vlan *vlan; | |
345 | ||
346 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
347 | if (!vlan) | |
348 | return; | |
349 | ||
350 | atomic_add(v, &vlan->tt.num_entries); | |
351 | ||
9c3bf081 | 352 | batadv_softif_vlan_put(vlan); |
7ea7b4a1 AQ |
353 | } |
354 | ||
355 | /** | |
356 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
357 | * vid | |
358 | * @bat_priv: the bat priv with all the soft interface information | |
359 | * @vid: the VLAN identifier | |
360 | */ | |
361 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
362 | unsigned short vid) | |
363 | { | |
364 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
365 | } | |
366 | ||
367 | /** | |
368 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
369 | * vid | |
370 | * @bat_priv: the bat priv with all the soft interface information | |
371 | * @vid: the VLAN identifier | |
372 | */ | |
373 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
374 | unsigned short vid) | |
375 | { | |
376 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
377 | } | |
378 | ||
379 | /** | |
d15cd622 AQ |
380 | * batadv_tt_global_size_mod - change the size by v of the global table |
381 | * for orig_node identified by vid | |
382 | * @orig_node: the originator for which the table has to be modified | |
7ea7b4a1 AQ |
383 | * @vid: the VLAN identifier |
384 | * @v: the amount to sum to the global table size | |
385 | */ | |
386 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
387 | unsigned short vid, int v) | |
388 | { | |
389 | struct batadv_orig_node_vlan *vlan; | |
390 | ||
391 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
392 | if (!vlan) | |
393 | return; | |
394 | ||
395 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
396 | spin_lock_bh(&orig_node->vlan_list_lock); | |
3db15209 SE |
397 | if (!hlist_unhashed(&vlan->list)) { |
398 | hlist_del_init_rcu(&vlan->list); | |
21754e25 | 399 | batadv_orig_node_vlan_put(vlan); |
3db15209 | 400 | } |
7ea7b4a1 | 401 | spin_unlock_bh(&orig_node->vlan_list_lock); |
7ea7b4a1 AQ |
402 | } |
403 | ||
21754e25 | 404 | batadv_orig_node_vlan_put(vlan); |
7ea7b4a1 AQ |
405 | } |
406 | ||
407 | /** | |
408 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
409 | * given vid | |
410 | * @orig_node: the originator which global table size has to be decreased | |
411 | * @vid: the vlan identifier | |
412 | */ | |
413 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
414 | unsigned short vid) | |
415 | { | |
416 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
417 | } | |
418 | ||
419 | /** | |
420 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
421 | * given vid | |
422 | * @orig_node: the originator which global table size has to be decreased | |
423 | * @vid: the vlan identifier | |
424 | */ | |
425 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
426 | unsigned short vid) | |
427 | { | |
428 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
429 | } | |
430 | ||
86452f81 SE |
431 | /** |
432 | * batadv_tt_orig_list_entry_free_rcu - free the orig_entry | |
433 | * @rcu: rcu pointer of the orig_entry | |
434 | */ | |
435 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) | |
436 | { | |
437 | struct batadv_tt_orig_list_entry *orig_entry; | |
438 | ||
439 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); | |
440 | ||
441 | kmem_cache_free(batadv_tt_orig_cache, orig_entry); | |
442 | } | |
443 | ||
42eff6a6 SE |
444 | /** |
445 | * batadv_tt_orig_list_entry_release - release tt orig entry from lists and | |
446 | * queue for free after rcu grace period | |
6e8ef69d | 447 | * @ref: kref pointer of the tt orig entry |
42eff6a6 | 448 | */ |
6e8ef69d | 449 | static void batadv_tt_orig_list_entry_release(struct kref *ref) |
42eff6a6 | 450 | { |
6e8ef69d SE |
451 | struct batadv_tt_orig_list_entry *orig_entry; |
452 | ||
453 | orig_entry = container_of(ref, struct batadv_tt_orig_list_entry, | |
454 | refcount); | |
455 | ||
5d967310 | 456 | batadv_orig_node_put(orig_entry->orig_node); |
86452f81 | 457 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
42eff6a6 SE |
458 | } |
459 | ||
6e8ef69d | 460 | /** |
7e2366c6 SE |
461 | * batadv_tt_orig_list_entry_put - decrement the tt orig entry refcounter and |
462 | * possibly release it | |
6e8ef69d SE |
463 | * @orig_entry: tt orig entry to be free'd |
464 | */ | |
a513088d | 465 | static void |
7e2366c6 | 466 | batadv_tt_orig_list_entry_put(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 467 | { |
6e8ef69d | 468 | kref_put(&orig_entry->refcount, batadv_tt_orig_list_entry_release); |
7683fdc1 AQ |
469 | } |
470 | ||
3abe4adb AQ |
471 | /** |
472 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
473 | * @bat_priv: the bat priv with all the soft interface information | |
474 | * @tt_local_entry: the TT entry involved in the event | |
475 | * @event_flags: flags to store in the event structure | |
476 | */ | |
56303d34 | 477 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 478 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 479 | u8 event_flags) |
a73105b8 | 480 | { |
56303d34 | 481 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 482 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 483 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
484 | bool event_removed = false; |
485 | bool del_op_requested, del_op_entry; | |
a73105b8 | 486 | |
86452f81 | 487 | tt_change_node = kmem_cache_alloc(batadv_tt_change_cache, GFP_ATOMIC); |
a73105b8 AQ |
488 | if (!tt_change_node) |
489 | return; | |
490 | ||
ff66c975 | 491 | tt_change_node->change.flags = flags; |
ca663046 AQ |
492 | memset(tt_change_node->change.reserved, 0, |
493 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 494 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 495 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 496 | |
acd34afa | 497 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
498 | |
499 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
500 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
501 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 502 | list) { |
3abe4adb | 503 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
504 | continue; |
505 | ||
506 | /* DEL+ADD in the same orig interval have no effect and can be | |
507 | * removed to avoid silly behaviour on the receiver side. The | |
508 | * other way around (ADD+DEL) can happen in case of roaming of | |
509 | * a client still in the NEW state. Roaming of NEW clients is | |
510 | * now possible due to automatically recognition of "temporary" | |
511 | * clients | |
512 | */ | |
acd34afa | 513 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
514 | if (!del_op_requested && del_op_entry) |
515 | goto del; | |
516 | if (del_op_requested && !del_op_entry) | |
517 | goto del; | |
3c4f7ab6 AQ |
518 | |
519 | /* this is a second add in the same originator interval. It | |
520 | * means that flags have been changed: update them! | |
521 | */ | |
522 | if (!del_op_requested && !del_op_entry) | |
523 | entry->change.flags = flags; | |
524 | ||
3b643de5 AQ |
525 | continue; |
526 | del: | |
527 | list_del(&entry->list); | |
86452f81 SE |
528 | kmem_cache_free(batadv_tt_change_cache, entry); |
529 | kmem_cache_free(batadv_tt_change_cache, tt_change_node); | |
3b643de5 AQ |
530 | event_removed = true; |
531 | goto unlock; | |
532 | } | |
533 | ||
a73105b8 | 534 | /* track the change in the OGMinterval list */ |
807736f6 | 535 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
536 | |
537 | unlock: | |
807736f6 | 538 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 539 | |
3b643de5 | 540 | if (event_removed) |
807736f6 | 541 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 542 | else |
807736f6 | 543 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
544 | } |
545 | ||
335fbe0f ML |
546 | /** |
547 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
548 | * @changes_num: number of tt changes | |
549 | * | |
62fe710f | 550 | * Return: computed length in bytes. |
335fbe0f ML |
551 | */ |
552 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 553 | { |
335fbe0f | 554 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
555 | } |
556 | ||
298e6e68 AQ |
557 | /** |
558 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
559 | * @tt_len: available space | |
560 | * | |
62fe710f | 561 | * Return: the number of entries. |
298e6e68 | 562 | */ |
6b5e971a | 563 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
564 | { |
565 | return tt_len / batadv_tt_len(1); | |
566 | } | |
567 | ||
a19d3d85 ML |
568 | /** |
569 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
570 | * size when transmitted over the air | |
571 | * @bat_priv: the bat priv with all the soft interface information | |
572 | * | |
62fe710f | 573 | * Return: local translation table size in bytes. |
a19d3d85 ML |
574 | */ |
575 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
576 | { | |
4f248cff SE |
577 | u16 num_vlan = 0; |
578 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
579 | struct batadv_softif_vlan *vlan; |
580 | int hdr_size; | |
581 | ||
582 | rcu_read_lock(); | |
583 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
584 | num_vlan++; | |
585 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
586 | } | |
587 | rcu_read_unlock(); | |
588 | ||
589 | /* header size of tvlv encapsulated tt response payload */ | |
590 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
591 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
592 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
593 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
594 | ||
595 | return hdr_size + batadv_tt_len(tt_local_entries); | |
596 | } | |
597 | ||
56303d34 | 598 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 599 | { |
807736f6 | 600 | if (bat_priv->tt.local_hash) |
5346c35e | 601 | return 0; |
c6c8fea2 | 602 | |
807736f6 | 603 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 604 | |
807736f6 | 605 | if (!bat_priv->tt.local_hash) |
5346c35e | 606 | return -ENOMEM; |
c6c8fea2 | 607 | |
dec05074 AQ |
608 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
609 | &batadv_tt_local_hash_lock_class_key); | |
610 | ||
5346c35e | 611 | return 0; |
c6c8fea2 SE |
612 | } |
613 | ||
068ee6e2 AQ |
614 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
615 | struct batadv_tt_global_entry *tt_global, | |
616 | const char *message) | |
617 | { | |
618 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
619 | "Deleting global tt entry %pM (vid: %d): %s\n", |
620 | tt_global->common.addr, | |
621 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
622 | |
623 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 624 | batadv_choose_tt, &tt_global->common); |
5dafd8a6 | 625 | batadv_tt_global_entry_put(tt_global); |
068ee6e2 AQ |
626 | } |
627 | ||
c018ad3d AQ |
628 | /** |
629 | * batadv_tt_local_add - add a new client to the local table or update an | |
630 | * existing client | |
631 | * @soft_iface: netdev struct of the mesh interface | |
632 | * @addr: the mac address of the client to add | |
633 | * @vid: VLAN identifier | |
634 | * @ifindex: index of the interface where the client is connected to (useful to | |
635 | * identify wireless clients) | |
9464d071 AQ |
636 | * @mark: the value contained in the skb->mark field of the received packet (if |
637 | * any) | |
a19d3d85 | 638 | * |
62fe710f | 639 | * Return: true if the client was successfully added, false otherwise. |
c018ad3d | 640 | */ |
6b5e971a SE |
641 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
642 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 643 | { |
56303d34 | 644 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 645 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 646 | struct batadv_tt_global_entry *tt_global = NULL; |
2cd45a06 | 647 | struct net *net = dev_net(soft_iface); |
35df3b29 | 648 | struct batadv_softif_vlan *vlan; |
0c69aecc | 649 | struct net_device *in_dev = NULL; |
db08e6e5 | 650 | struct hlist_head *head; |
56303d34 | 651 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 652 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
653 | bool ret = false; |
654 | bool roamed_back = false; | |
6b5e971a SE |
655 | u8 remote_flags; |
656 | u32 match_mark; | |
c6c8fea2 | 657 | |
0c69aecc | 658 | if (ifindex != BATADV_NULL_IFINDEX) |
2cd45a06 | 659 | in_dev = dev_get_by_index(net, ifindex); |
0c69aecc | 660 | |
c018ad3d | 661 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
662 | |
663 | if (!is_multicast_ether_addr(addr)) | |
664 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 665 | |
47c94655 AQ |
666 | if (tt_local) { |
667 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
668 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
669 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
670 | "Re-adding pending client %pM (vid: %d)\n", |
671 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
672 | /* whatever the reason why the PENDING flag was set, |
673 | * this is a client which was enqueued to be removed in | |
674 | * this orig_interval. Since it popped up again, the | |
675 | * flag can be reset like it was never enqueued | |
676 | */ | |
677 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
678 | goto add_event; | |
679 | } | |
680 | ||
681 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
682 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
683 | "Roaming client %pM (vid: %d) came back to its original location\n", |
684 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
685 | /* the ROAM flag is set because this client roamed away |
686 | * and the node got a roaming_advertisement message. Now | |
687 | * that the client popped up again at its original | |
688 | * location such flag can be unset | |
689 | */ | |
690 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
691 | roamed_back = true; | |
692 | } | |
693 | goto check_roaming; | |
c6c8fea2 SE |
694 | } |
695 | ||
a19d3d85 ML |
696 | /* Ignore the client if we cannot send it in a full table response. */ |
697 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
698 | table_size += batadv_tt_len(1); | |
699 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
700 | if (table_size > packet_size_max) { | |
701 | net_ratelimited_function(batadv_info, soft_iface, | |
702 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
703 | table_size, packet_size_max, addr); | |
704 | goto out; | |
705 | } | |
706 | ||
86452f81 | 707 | tt_local = kmem_cache_alloc(batadv_tl_cache, GFP_ATOMIC); |
47c94655 | 708 | if (!tt_local) |
7683fdc1 | 709 | goto out; |
a73105b8 | 710 | |
35df3b29 AQ |
711 | /* increase the refcounter of the related vlan */ |
712 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
0b3dd7df SW |
713 | if (!vlan) { |
714 | net_ratelimited_function(batadv_info, soft_iface, | |
715 | "adding TT local entry %pM to non-existent VLAN %d\n", | |
716 | addr, BATADV_PRINT_VID(vid)); | |
86452f81 | 717 | kmem_cache_free(batadv_tl_cache, tt_local); |
fd7dec25 | 718 | tt_local = NULL; |
354136bc | 719 | goto out; |
fd7dec25 | 720 | } |
35df3b29 | 721 | |
39c75a51 | 722 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
723 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
724 | addr, BATADV_PRINT_VID(vid), | |
6b5e971a | 725 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 726 | |
8fdd0153 | 727 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
728 | /* The local entry has to be marked as NEW to avoid to send it in |
729 | * a full table response going out before the next ttvn increment | |
730 | * (consistency check) | |
731 | */ | |
732 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 733 | tt_local->common.vid = vid; |
0c69aecc | 734 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 | 735 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
92dcdf09 SE |
736 | kref_init(&tt_local->common.refcount); |
737 | kref_get(&tt_local->common.refcount); | |
47c94655 AQ |
738 | tt_local->last_seen = jiffies; |
739 | tt_local->common.added_at = tt_local->last_seen; | |
a33d970d | 740 | tt_local->vlan = vlan; |
c6c8fea2 | 741 | |
c5caf4ef LL |
742 | /* the batman interface mac and multicast addresses should never be |
743 | * purged | |
744 | */ | |
745 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
746 | is_multicast_ether_addr(addr)) | |
47c94655 | 747 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 748 | |
807736f6 | 749 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 750 | batadv_choose_tt, &tt_local->common, |
47c94655 | 751 | &tt_local->common.hash_entry); |
80b3f58c SW |
752 | |
753 | if (unlikely(hash_added != 0)) { | |
754 | /* remove the reference for the hash */ | |
95c0db90 | 755 | batadv_tt_local_entry_put(tt_local); |
80b3f58c SW |
756 | goto out; |
757 | } | |
758 | ||
068ee6e2 | 759 | add_event: |
3abe4adb | 760 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 761 | |
068ee6e2 AQ |
762 | check_roaming: |
763 | /* Check whether it is a roaming, but don't do anything if the roaming | |
764 | * process has already been handled | |
765 | */ | |
766 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 767 | /* These node are probably going to update their tt table */ |
47c94655 | 768 | head = &tt_global->orig_list; |
db08e6e5 | 769 | rcu_read_lock(); |
b67bfe0d | 770 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 771 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 772 | tt_global->common.vid, |
a513088d | 773 | orig_entry->orig_node); |
db08e6e5 SW |
774 | } |
775 | rcu_read_unlock(); | |
068ee6e2 AQ |
776 | if (roamed_back) { |
777 | batadv_tt_global_free(bat_priv, tt_global, | |
778 | "Roaming canceled"); | |
779 | tt_global = NULL; | |
780 | } else { | |
781 | /* The global entry has to be marked as ROAMING and | |
782 | * has to be kept for consistency purpose | |
783 | */ | |
784 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
785 | tt_global->roam_at = jiffies; | |
786 | } | |
7683fdc1 | 787 | } |
068ee6e2 | 788 | |
3c4f7ab6 AQ |
789 | /* store the current remote flags before altering them. This helps |
790 | * understanding is flags are changing or not | |
791 | */ | |
792 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
793 | ||
794 | if (batadv_is_wifi_netdev(in_dev)) | |
795 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
796 | else | |
797 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 798 | |
9464d071 AQ |
799 | /* check the mark in the skb: if it's equal to the configured |
800 | * isolation_mark, it means the packet is coming from an isolated | |
801 | * non-mesh client | |
802 | */ | |
803 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
804 | if (bat_priv->isolation_mark_mask && | |
805 | match_mark == bat_priv->isolation_mark) | |
806 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
807 | else | |
808 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
809 | ||
3c4f7ab6 AQ |
810 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
811 | * entry so that all the nodes can get the new flags | |
812 | */ | |
813 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
814 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
815 | ||
816 | ret = true; | |
7683fdc1 | 817 | out: |
0c69aecc AQ |
818 | if (in_dev) |
819 | dev_put(in_dev); | |
47c94655 | 820 | if (tt_local) |
95c0db90 | 821 | batadv_tt_local_entry_put(tt_local); |
47c94655 | 822 | if (tt_global) |
5dafd8a6 | 823 | batadv_tt_global_entry_put(tt_global); |
a19d3d85 | 824 | return ret; |
c6c8fea2 SE |
825 | } |
826 | ||
7ea7b4a1 AQ |
827 | /** |
828 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
829 | * within a TT Response directed to another node | |
830 | * @orig_node: originator for which the TT data has to be prepared | |
831 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
832 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
833 | * changed can be stored | |
834 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
835 | * function reserves the amount of space needed to send the entire global TT | |
836 | * table. In case of success the value is updated with the real amount of | |
837 | * reserved bytes | |
7ea7b4a1 AQ |
838 | * Allocate the needed amount of memory for the entire TT TVLV and write its |
839 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
840 | * objects, one per active VLAN served by the originator node. | |
841 | * | |
62fe710f | 842 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 843 | */ |
6b5e971a | 844 | static u16 |
7ea7b4a1 AQ |
845 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
846 | struct batadv_tvlv_tt_data **tt_data, | |
847 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 848 | s32 *tt_len) |
7ea7b4a1 | 849 | { |
4f248cff SE |
850 | u16 num_vlan = 0; |
851 | u16 num_entries = 0; | |
852 | u16 change_offset; | |
853 | u16 tvlv_len; | |
7ea7b4a1 AQ |
854 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
855 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 856 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
857 | |
858 | rcu_read_lock(); | |
d0fa4f3f | 859 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
860 | num_vlan++; |
861 | num_entries += atomic_read(&vlan->tt.num_entries); | |
862 | } | |
863 | ||
864 | change_offset = sizeof(**tt_data); | |
865 | change_offset += num_vlan * sizeof(*tt_vlan); | |
866 | ||
867 | /* if tt_len is negative, allocate the space needed by the full table */ | |
868 | if (*tt_len < 0) | |
869 | *tt_len = batadv_tt_len(num_entries); | |
870 | ||
871 | tvlv_len = *tt_len; | |
872 | tvlv_len += change_offset; | |
873 | ||
874 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
875 | if (!*tt_data) { | |
876 | *tt_len = 0; | |
877 | goto out; | |
878 | } | |
879 | ||
880 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
881 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
882 | (*tt_data)->num_vlan = htons(num_vlan); | |
883 | ||
884 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
d0fa4f3f | 885 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
886 | tt_vlan->vid = htons(vlan->vid); |
887 | tt_vlan->crc = htonl(vlan->tt.crc); | |
888 | ||
889 | tt_vlan++; | |
890 | } | |
891 | ||
6b5e971a | 892 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
893 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
894 | ||
895 | out: | |
896 | rcu_read_unlock(); | |
897 | return tvlv_len; | |
898 | } | |
899 | ||
900 | /** | |
901 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
902 | * node | |
903 | * @bat_priv: the bat priv with all the soft interface information | |
904 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
905 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
906 | * changes can be stored | |
907 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
908 | * function reserves the amount of space needed to send the entire local TT | |
909 | * table. In case of success the value is updated with the real amount of | |
910 | * reserved bytes | |
911 | * | |
912 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
913 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
914 | * objects, one per active VLAN. | |
915 | * | |
62fe710f | 916 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 917 | */ |
6b5e971a | 918 | static u16 |
7ea7b4a1 AQ |
919 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
920 | struct batadv_tvlv_tt_data **tt_data, | |
921 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 922 | s32 *tt_len) |
7ea7b4a1 AQ |
923 | { |
924 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
925 | struct batadv_softif_vlan *vlan; | |
4f248cff SE |
926 | u16 num_vlan = 0; |
927 | u16 num_entries = 0; | |
928 | u16 tvlv_len; | |
6b5e971a | 929 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
930 | int change_offset; |
931 | ||
932 | rcu_read_lock(); | |
933 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
934 | num_vlan++; | |
935 | num_entries += atomic_read(&vlan->tt.num_entries); | |
936 | } | |
937 | ||
938 | change_offset = sizeof(**tt_data); | |
939 | change_offset += num_vlan * sizeof(*tt_vlan); | |
940 | ||
941 | /* if tt_len is negative, allocate the space needed by the full table */ | |
942 | if (*tt_len < 0) | |
943 | *tt_len = batadv_tt_len(num_entries); | |
944 | ||
945 | tvlv_len = *tt_len; | |
946 | tvlv_len += change_offset; | |
947 | ||
948 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
949 | if (!*tt_data) { | |
950 | tvlv_len = 0; | |
951 | goto out; | |
952 | } | |
953 | ||
954 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
955 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
956 | (*tt_data)->num_vlan = htons(num_vlan); | |
957 | ||
958 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
959 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
960 | tt_vlan->vid = htons(vlan->vid); | |
961 | tt_vlan->crc = htonl(vlan->tt.crc); | |
962 | ||
963 | tt_vlan++; | |
964 | } | |
965 | ||
6b5e971a | 966 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
967 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
968 | ||
969 | out: | |
970 | rcu_read_unlock(); | |
971 | return tvlv_len; | |
972 | } | |
973 | ||
e1bf0c14 ML |
974 | /** |
975 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
976 | * after local tt changes have been committed | |
977 | * @bat_priv: the bat priv with all the soft interface information | |
978 | */ | |
979 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 980 | { |
e1bf0c14 ML |
981 | struct batadv_tt_change_node *entry, *safe; |
982 | struct batadv_tvlv_tt_data *tt_data; | |
983 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 984 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
985 | int tt_diff_entries_num = 0; |
986 | int tt_diff_entries_count = 0; | |
6b5e971a | 987 | u16 tvlv_len; |
be9aa4c1 | 988 | |
7ea7b4a1 AQ |
989 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
990 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
991 | |
992 | /* if we have too many changes for one packet don't send any | |
993 | * and wait for the tt table request which will be fragmented | |
994 | */ | |
e1bf0c14 ML |
995 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
996 | tt_diff_len = 0; | |
be9aa4c1 | 997 | |
7ea7b4a1 AQ |
998 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
999 | &tt_change, &tt_diff_len); | |
1000 | if (!tvlv_len) | |
e1bf0c14 | 1001 | return; |
be9aa4c1 | 1002 | |
e1bf0c14 | 1003 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 1004 | |
e1bf0c14 ML |
1005 | if (tt_diff_len == 0) |
1006 | goto container_register; | |
be9aa4c1 | 1007 | |
807736f6 SE |
1008 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
1009 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 1010 | |
807736f6 | 1011 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 1012 | list) { |
e1bf0c14 ML |
1013 | if (tt_diff_entries_count < tt_diff_entries_num) { |
1014 | memcpy(tt_change + tt_diff_entries_count, | |
1015 | &entry->change, | |
1016 | sizeof(struct batadv_tvlv_tt_change)); | |
1017 | tt_diff_entries_count++; | |
c6c8fea2 | 1018 | } |
a73105b8 | 1019 | list_del(&entry->list); |
86452f81 | 1020 | kmem_cache_free(batadv_tt_change_cache, entry); |
c6c8fea2 | 1021 | } |
807736f6 | 1022 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
1023 | |
1024 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
1025 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
1026 | kfree(bat_priv->tt.last_changeset); | |
1027 | bat_priv->tt.last_changeset_len = 0; | |
1028 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 1029 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 1030 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 1031 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 1032 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
1033 | * instead of providing the diff |
1034 | */ | |
e1bf0c14 | 1035 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 1036 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
1037 | memcpy(bat_priv->tt.last_changeset, |
1038 | tt_change, tt_change_len); | |
1039 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
1040 | } |
1041 | } | |
807736f6 | 1042 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 1043 | |
e1bf0c14 ML |
1044 | container_register: |
1045 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 1046 | tvlv_len); |
e1bf0c14 | 1047 | kfree(tt_data); |
c6c8fea2 SE |
1048 | } |
1049 | ||
08c36d3e | 1050 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1051 | { |
1052 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1053 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1054 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1055 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 1056 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 1057 | struct batadv_hard_iface *primary_if; |
c6c8fea2 | 1058 | struct hlist_head *head; |
6b5e971a | 1059 | u32 i; |
85766a82 AQ |
1060 | int last_seen_secs; |
1061 | int last_seen_msecs; | |
1062 | unsigned long last_seen_jiffies; | |
1063 | bool no_purge; | |
6b5e971a | 1064 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 1065 | |
30da63a6 ML |
1066 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1067 | if (!primary_if) | |
32ae9b22 | 1068 | goto out; |
c6c8fea2 | 1069 | |
86ceb360 | 1070 | seq_printf(seq, |
7ea7b4a1 | 1071 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 1072 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
925a6f37 AQ |
1073 | seq_puts(seq, |
1074 | " Client VID Flags Last seen (CRC )\n"); | |
c6c8fea2 | 1075 | |
c6c8fea2 SE |
1076 | for (i = 0; i < hash->size; i++) { |
1077 | head = &hash->table[i]; | |
1078 | ||
7aadf889 | 1079 | rcu_read_lock(); |
b67bfe0d | 1080 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1081 | head, hash_entry) { |
85766a82 AQ |
1082 | tt_local = container_of(tt_common_entry, |
1083 | struct batadv_tt_local_entry, | |
1084 | common); | |
1085 | last_seen_jiffies = jiffies - tt_local->last_seen; | |
1086 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1087 | last_seen_secs = last_seen_msecs / 1000; | |
1088 | last_seen_msecs = last_seen_msecs % 1000; | |
1089 | ||
1090 | no_purge = tt_common_entry->flags & np_flag; | |
7ea7b4a1 | 1091 | seq_printf(seq, |
dd24ddb2 | 1092 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 1093 | tt_common_entry->addr, |
16052789 | 1094 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
1095 | ((tt_common_entry->flags & |
1096 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 1097 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
1098 | ((tt_common_entry->flags & |
1099 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
1100 | ((tt_common_entry->flags & | |
1101 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
1102 | ((tt_common_entry->flags & | |
1103 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1104 | ((tt_common_entry->flags & | |
1105 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1106 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 | 1107 | no_purge ? 0 : last_seen_msecs, |
a33d970d | 1108 | tt_local->vlan->tt.crc); |
c6c8fea2 | 1109 | } |
7aadf889 | 1110 | rcu_read_unlock(); |
c6c8fea2 | 1111 | } |
32ae9b22 ML |
1112 | out: |
1113 | if (primary_if) | |
82047ad7 | 1114 | batadv_hardif_put(primary_if); |
30da63a6 | 1115 | return 0; |
c6c8fea2 SE |
1116 | } |
1117 | ||
d34f0550 MS |
1118 | /** |
1119 | * batadv_tt_local_dump_entry - Dump one TT local entry into a message | |
1120 | * @msg :Netlink message to dump into | |
1121 | * @portid: Port making netlink request | |
1122 | * @seq: Sequence number of netlink message | |
1123 | * @bat_priv: The bat priv with all the soft interface information | |
1124 | * @common: tt local & tt global common data | |
1125 | * | |
1126 | * Return: Error code, or 0 on success | |
1127 | */ | |
1128 | static int | |
1129 | batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
1130 | struct batadv_priv *bat_priv, | |
1131 | struct batadv_tt_common_entry *common) | |
1132 | { | |
1133 | void *hdr; | |
1134 | struct batadv_softif_vlan *vlan; | |
1135 | struct batadv_tt_local_entry *local; | |
1136 | unsigned int last_seen_msecs; | |
1137 | u32 crc; | |
1138 | ||
1139 | local = container_of(common, struct batadv_tt_local_entry, common); | |
1140 | last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen); | |
1141 | ||
1142 | vlan = batadv_softif_vlan_get(bat_priv, common->vid); | |
1143 | if (!vlan) | |
1144 | return 0; | |
1145 | ||
1146 | crc = vlan->tt.crc; | |
1147 | ||
1148 | batadv_softif_vlan_put(vlan); | |
1149 | ||
1150 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
1151 | NLM_F_MULTI, | |
1152 | BATADV_CMD_GET_TRANSTABLE_LOCAL); | |
1153 | if (!hdr) | |
1154 | return -ENOBUFS; | |
1155 | ||
1156 | if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || | |
1157 | nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || | |
1158 | nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || | |
1159 | nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) | |
1160 | goto nla_put_failure; | |
1161 | ||
1162 | if (!(common->flags & BATADV_TT_CLIENT_NOPURGE) && | |
1163 | nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, last_seen_msecs)) | |
1164 | goto nla_put_failure; | |
1165 | ||
1166 | genlmsg_end(msg, hdr); | |
1167 | return 0; | |
1168 | ||
1169 | nla_put_failure: | |
1170 | genlmsg_cancel(msg, hdr); | |
1171 | return -EMSGSIZE; | |
1172 | } | |
1173 | ||
1174 | /** | |
1175 | * batadv_tt_local_dump_bucket - Dump one TT local bucket into a message | |
1176 | * @msg: Netlink message to dump into | |
1177 | * @portid: Port making netlink request | |
1178 | * @seq: Sequence number of netlink message | |
1179 | * @bat_priv: The bat priv with all the soft interface information | |
1180 | * @head: Pointer to the list containing the local tt entries | |
1181 | * @idx_s: Number of entries to skip | |
1182 | * | |
1183 | * Return: Error code, or 0 on success | |
1184 | */ | |
1185 | static int | |
1186 | batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
1187 | struct batadv_priv *bat_priv, | |
1188 | struct hlist_head *head, int *idx_s) | |
1189 | { | |
1190 | struct batadv_tt_common_entry *common; | |
1191 | int idx = 0; | |
1192 | ||
1193 | rcu_read_lock(); | |
1194 | hlist_for_each_entry_rcu(common, head, hash_entry) { | |
1195 | if (idx++ < *idx_s) | |
1196 | continue; | |
1197 | ||
1198 | if (batadv_tt_local_dump_entry(msg, portid, seq, bat_priv, | |
1199 | common)) { | |
1200 | rcu_read_unlock(); | |
1201 | *idx_s = idx - 1; | |
1202 | return -EMSGSIZE; | |
1203 | } | |
1204 | } | |
1205 | rcu_read_unlock(); | |
1206 | ||
1207 | *idx_s = 0; | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | /** | |
1212 | * batadv_tt_local_dump - Dump TT local entries into a message | |
1213 | * @msg: Netlink message to dump into | |
1214 | * @cb: Parameters from query | |
1215 | * | |
1216 | * Return: Error code, or 0 on success | |
1217 | */ | |
1218 | int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
1219 | { | |
1220 | struct net *net = sock_net(cb->skb->sk); | |
1221 | struct net_device *soft_iface; | |
1222 | struct batadv_priv *bat_priv; | |
1223 | struct batadv_hard_iface *primary_if = NULL; | |
1224 | struct batadv_hashtable *hash; | |
1225 | struct hlist_head *head; | |
1226 | int ret; | |
1227 | int ifindex; | |
1228 | int bucket = cb->args[0]; | |
1229 | int idx = cb->args[1]; | |
1230 | int portid = NETLINK_CB(cb->skb).portid; | |
1231 | ||
1232 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
1233 | if (!ifindex) | |
1234 | return -EINVAL; | |
1235 | ||
1236 | soft_iface = dev_get_by_index(net, ifindex); | |
1237 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
1238 | ret = -ENODEV; | |
1239 | goto out; | |
1240 | } | |
1241 | ||
1242 | bat_priv = netdev_priv(soft_iface); | |
1243 | ||
1244 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
1245 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { | |
1246 | ret = -ENOENT; | |
1247 | goto out; | |
1248 | } | |
1249 | ||
1250 | hash = bat_priv->tt.local_hash; | |
1251 | ||
1252 | while (bucket < hash->size) { | |
1253 | head = &hash->table[bucket]; | |
1254 | ||
1255 | if (batadv_tt_local_dump_bucket(msg, portid, cb->nlh->nlmsg_seq, | |
1256 | bat_priv, head, &idx)) | |
1257 | break; | |
1258 | ||
1259 | bucket++; | |
1260 | } | |
1261 | ||
1262 | ret = msg->len; | |
1263 | ||
1264 | out: | |
1265 | if (primary_if) | |
1266 | batadv_hardif_put(primary_if); | |
1267 | if (soft_iface) | |
1268 | dev_put(soft_iface); | |
1269 | ||
1270 | cb->args[0] = bucket; | |
1271 | cb->args[1] = idx; | |
1272 | ||
1273 | return ret; | |
1274 | } | |
1275 | ||
56303d34 SE |
1276 | static void |
1277 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1278 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1279 | u16 flags, const char *message) |
c6c8fea2 | 1280 | { |
3abe4adb | 1281 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1282 | |
015758d0 AQ |
1283 | /* The local client has to be marked as "pending to be removed" but has |
1284 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1285 | * response issued before the net ttvn increment (consistency check) |
1286 | */ | |
acd34afa | 1287 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1288 | |
39c75a51 | 1289 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1290 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1291 | tt_local_entry->common.addr, | |
1292 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1293 | } |
1294 | ||
7f91d06c AQ |
1295 | /** |
1296 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1297 | * @bat_priv: the bat priv with all the soft interface information | |
1298 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1299 | * @vid: VLAN identifier |
7f91d06c AQ |
1300 | * @message: message to append to the log on deletion |
1301 | * @roaming: true if the deletion is due to a roaming event | |
1302 | * | |
62fe710f | 1303 | * Return: the flags assigned to the local entry before being deleted |
7f91d06c | 1304 | */ |
6b5e971a SE |
1305 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1306 | unsigned short vid, const char *message, | |
1307 | bool roaming) | |
c6c8fea2 | 1308 | { |
170173bf | 1309 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1310 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
ef72706a | 1311 | void *tt_entry_exists; |
c6c8fea2 | 1312 | |
c018ad3d | 1313 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1314 | if (!tt_local_entry) |
1315 | goto out; | |
1316 | ||
7f91d06c AQ |
1317 | curr_flags = tt_local_entry->common.flags; |
1318 | ||
acd34afa | 1319 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1320 | /* if this global entry addition is due to a roaming, the node has to |
1321 | * mark the local entry as "roamed" in order to correctly reroute | |
1322 | * packets later | |
1323 | */ | |
7c1fd91d | 1324 | if (roaming) { |
acd34afa | 1325 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1326 | /* mark the local client as ROAMed */ |
1327 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1328 | } | |
42d0b044 | 1329 | |
068ee6e2 AQ |
1330 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1331 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1332 | message); | |
1333 | goto out; | |
1334 | } | |
1335 | /* if this client has been added right now, it is possible to | |
1336 | * immediately purge it | |
1337 | */ | |
3abe4adb | 1338 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1339 | |
1340 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1341 | batadv_compare_tt, | |
1342 | batadv_choose_tt, | |
1343 | &tt_local_entry->common); | |
1344 | if (!tt_entry_exists) | |
1345 | goto out; | |
1346 | ||
1347 | /* extra call to free the local tt entry */ | |
95c0db90 | 1348 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c | 1349 | |
7683fdc1 AQ |
1350 | out: |
1351 | if (tt_local_entry) | |
95c0db90 | 1352 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c AQ |
1353 | |
1354 | return curr_flags; | |
c6c8fea2 SE |
1355 | } |
1356 | ||
a19d3d85 ML |
1357 | /** |
1358 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1359 | * @bat_priv: the bat priv with all the soft interface information | |
1360 | * @head: pointer to the list containing the local tt entries | |
1361 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1362 | * inactive or not | |
1363 | */ | |
56303d34 | 1364 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1365 | struct hlist_head *head, |
1366 | int timeout) | |
c6c8fea2 | 1367 | { |
56303d34 SE |
1368 | struct batadv_tt_local_entry *tt_local_entry; |
1369 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1370 | struct hlist_node *node_tmp; |
acd34afa | 1371 | |
b67bfe0d | 1372 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1373 | hash_entry) { |
1374 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1375 | struct batadv_tt_local_entry, |
1376 | common); | |
acd34afa SE |
1377 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1378 | continue; | |
1379 | ||
1380 | /* entry already marked for deletion */ | |
1381 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1382 | continue; | |
1383 | ||
a19d3d85 | 1384 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1385 | continue; |
1386 | ||
1387 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1388 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1389 | } | |
1390 | } | |
1391 | ||
a19d3d85 ML |
1392 | /** |
1393 | * batadv_tt_local_purge - purge inactive tt local entries | |
1394 | * @bat_priv: the bat priv with all the soft interface information | |
1395 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1396 | * inactive or not | |
1397 | */ | |
1398 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1399 | int timeout) | |
acd34afa | 1400 | { |
807736f6 | 1401 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1402 | struct hlist_head *head; |
7683fdc1 | 1403 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1404 | u32 i; |
c6c8fea2 | 1405 | |
c6c8fea2 SE |
1406 | for (i = 0; i < hash->size; i++) { |
1407 | head = &hash->table[i]; | |
7683fdc1 | 1408 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1409 | |
7683fdc1 | 1410 | spin_lock_bh(list_lock); |
a19d3d85 | 1411 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1412 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1413 | } |
c6c8fea2 SE |
1414 | } |
1415 | ||
56303d34 | 1416 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1417 | { |
5bf74e9c | 1418 | struct batadv_hashtable *hash; |
a73105b8 | 1419 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1420 | struct batadv_tt_common_entry *tt_common_entry; |
1421 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 1422 | struct hlist_node *node_tmp; |
7683fdc1 | 1423 | struct hlist_head *head; |
6b5e971a | 1424 | u32 i; |
a73105b8 | 1425 | |
807736f6 | 1426 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1427 | return; |
1428 | ||
807736f6 | 1429 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1430 | |
1431 | for (i = 0; i < hash->size; i++) { | |
1432 | head = &hash->table[i]; | |
1433 | list_lock = &hash->list_locks[i]; | |
1434 | ||
1435 | spin_lock_bh(list_lock); | |
b67bfe0d | 1436 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1437 | head, hash_entry) { |
b67bfe0d | 1438 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1439 | tt_local = container_of(tt_common_entry, |
1440 | struct batadv_tt_local_entry, | |
1441 | common); | |
35df3b29 | 1442 | |
95c0db90 | 1443 | batadv_tt_local_entry_put(tt_local); |
a73105b8 AQ |
1444 | } |
1445 | spin_unlock_bh(list_lock); | |
1446 | } | |
1447 | ||
1a8eaf07 | 1448 | batadv_hash_destroy(hash); |
a73105b8 | 1449 | |
807736f6 | 1450 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1451 | } |
1452 | ||
56303d34 | 1453 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1454 | { |
807736f6 | 1455 | if (bat_priv->tt.global_hash) |
5346c35e | 1456 | return 0; |
c6c8fea2 | 1457 | |
807736f6 | 1458 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1459 | |
807736f6 | 1460 | if (!bat_priv->tt.global_hash) |
5346c35e | 1461 | return -ENOMEM; |
c6c8fea2 | 1462 | |
dec05074 AQ |
1463 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1464 | &batadv_tt_global_hash_lock_class_key); | |
1465 | ||
5346c35e | 1466 | return 0; |
c6c8fea2 SE |
1467 | } |
1468 | ||
56303d34 | 1469 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1470 | { |
56303d34 | 1471 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1472 | |
807736f6 | 1473 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1474 | |
807736f6 | 1475 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1476 | list) { |
1477 | list_del(&entry->list); | |
86452f81 | 1478 | kmem_cache_free(batadv_tt_change_cache, entry); |
a73105b8 | 1479 | } |
c6c8fea2 | 1480 | |
807736f6 SE |
1481 | atomic_set(&bat_priv->tt.local_changes, 0); |
1482 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1483 | } |
c6c8fea2 | 1484 | |
62fe710f | 1485 | /** |
d15cd622 AQ |
1486 | * batadv_tt_global_orig_entry_find - find a TT orig_list_entry |
1487 | * @entry: the TT global entry where the orig_list_entry has to be | |
1488 | * extracted from | |
1489 | * @orig_node: the originator for which the orig_list_entry has to be found | |
62fe710f | 1490 | * |
d15cd622 | 1491 | * retrieve the orig_tt_list_entry belonging to orig_node from the |
d657e621 AQ |
1492 | * batadv_tt_global_entry list |
1493 | * | |
62fe710f | 1494 | * Return: it with an increased refcounter, NULL if not found |
db08e6e5 | 1495 | */ |
d657e621 AQ |
1496 | static struct batadv_tt_orig_list_entry * |
1497 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1498 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1499 | { |
d657e621 | 1500 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1501 | const struct hlist_head *head; |
db08e6e5 SW |
1502 | |
1503 | rcu_read_lock(); | |
1504 | head = &entry->orig_list; | |
b67bfe0d | 1505 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1506 | if (tmp_orig_entry->orig_node != orig_node) |
1507 | continue; | |
6e8ef69d | 1508 | if (!kref_get_unless_zero(&tmp_orig_entry->refcount)) |
d657e621 AQ |
1509 | continue; |
1510 | ||
1511 | orig_entry = tmp_orig_entry; | |
1512 | break; | |
db08e6e5 SW |
1513 | } |
1514 | rcu_read_unlock(); | |
d657e621 AQ |
1515 | |
1516 | return orig_entry; | |
1517 | } | |
1518 | ||
62fe710f | 1519 | /** |
d15cd622 AQ |
1520 | * batadv_tt_global_entry_has_orig - check if a TT global entry is also handled |
1521 | * by a given originator | |
1522 | * @entry: the TT global entry to check | |
1523 | * @orig_node: the originator to search in the list | |
62fe710f SE |
1524 | * |
1525 | * find out if an orig_node is already in the list of a tt_global_entry. | |
1526 | * | |
1527 | * Return: true if found, false otherwise | |
d657e621 AQ |
1528 | */ |
1529 | static bool | |
1530 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1531 | const struct batadv_orig_node *orig_node) | |
1532 | { | |
1533 | struct batadv_tt_orig_list_entry *orig_entry; | |
1534 | bool found = false; | |
1535 | ||
1536 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1537 | if (orig_entry) { | |
1538 | found = true; | |
7e2366c6 | 1539 | batadv_tt_orig_list_entry_put(orig_entry); |
d657e621 AQ |
1540 | } |
1541 | ||
db08e6e5 SW |
1542 | return found; |
1543 | } | |
1544 | ||
a513088d | 1545 | static void |
d657e621 | 1546 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1547 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1548 | { |
56303d34 | 1549 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1550 | |
d657e621 | 1551 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1552 | if (orig_entry) { |
1553 | /* refresh the ttvn: the current value could be a bogus one that | |
1554 | * was added during a "temporary client detection" | |
1555 | */ | |
1556 | orig_entry->ttvn = ttvn; | |
d657e621 | 1557 | goto out; |
30cfd02b | 1558 | } |
d657e621 | 1559 | |
86452f81 | 1560 | orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC); |
db08e6e5 | 1561 | if (!orig_entry) |
d657e621 | 1562 | goto out; |
db08e6e5 SW |
1563 | |
1564 | INIT_HLIST_NODE(&orig_entry->list); | |
7c124391 | 1565 | kref_get(&orig_node->refcount); |
7ea7b4a1 | 1566 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1567 | orig_entry->orig_node = orig_node; |
1568 | orig_entry->ttvn = ttvn; | |
6e8ef69d SE |
1569 | kref_init(&orig_entry->refcount); |
1570 | kref_get(&orig_entry->refcount); | |
db08e6e5 | 1571 | |
d657e621 | 1572 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1573 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1574 | &tt_global->orig_list); |
1575 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1576 | atomic_inc(&tt_global->orig_list_count); |
1577 | ||
d657e621 AQ |
1578 | out: |
1579 | if (orig_entry) | |
7e2366c6 | 1580 | batadv_tt_orig_list_entry_put(orig_entry); |
db08e6e5 SW |
1581 | } |
1582 | ||
d4ff40f6 AQ |
1583 | /** |
1584 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1585 | * @bat_priv: the bat priv with all the soft interface information | |
1586 | * @orig_node: the originator announcing the client | |
1587 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1588 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1589 | * @flags: TT flags that have to be set for this non-mesh client |
1590 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1591 | * | |
1592 | * Add a new TT global entry for the given originator. If the entry already | |
1593 | * exists add a new reference to the given originator (a global entry can have | |
1594 | * references to multiple originators) and adjust the flags attribute to reflect | |
1595 | * the function argument. | |
1596 | * If a TT local entry exists for this non-mesh client remove it. | |
1597 | * | |
1598 | * The caller must hold orig_node refcount. | |
1e5d49fc | 1599 | * |
62fe710f | 1600 | * Return: true if the new entry has been added, false otherwise |
d4ff40f6 | 1601 | */ |
1e5d49fc AQ |
1602 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1603 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1604 | const unsigned char *tt_addr, |
6b5e971a | 1605 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1606 | { |
170173bf SE |
1607 | struct batadv_tt_global_entry *tt_global_entry; |
1608 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1609 | bool ret = false; |
80b3f58c | 1610 | int hash_added; |
56303d34 | 1611 | struct batadv_tt_common_entry *common; |
6b5e971a | 1612 | u16 local_flags; |
c6c8fea2 | 1613 | |
cfd4f757 AQ |
1614 | /* ignore global entries from backbone nodes */ |
1615 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1616 | return true; | |
1617 | ||
c018ad3d AQ |
1618 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1619 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1620 | |
1621 | /* if the node already has a local client for this entry, it has to wait | |
1622 | * for a roaming advertisement instead of manually messing up the global | |
1623 | * table | |
1624 | */ | |
1625 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1626 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1627 | goto out; | |
a73105b8 AQ |
1628 | |
1629 | if (!tt_global_entry) { | |
86452f81 SE |
1630 | tt_global_entry = kmem_cache_zalloc(batadv_tg_cache, |
1631 | GFP_ATOMIC); | |
a73105b8 | 1632 | if (!tt_global_entry) |
7683fdc1 AQ |
1633 | goto out; |
1634 | ||
c0a55929 | 1635 | common = &tt_global_entry->common; |
8fdd0153 | 1636 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1637 | common->vid = vid; |
db08e6e5 | 1638 | |
d4f44692 | 1639 | common->flags = flags; |
cc47f66e | 1640 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1641 | /* node must store current time in case of roaming. This is |
1642 | * needed to purge this entry out on timeout (if nobody claims | |
1643 | * it) | |
1644 | */ | |
1645 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1646 | tt_global_entry->roam_at = jiffies; | |
92dcdf09 SE |
1647 | kref_init(&common->refcount); |
1648 | kref_get(&common->refcount); | |
30cfd02b | 1649 | common->added_at = jiffies; |
db08e6e5 SW |
1650 | |
1651 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1652 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1653 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1654 | |
807736f6 | 1655 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1656 | batadv_compare_tt, |
c018ad3d | 1657 | batadv_choose_tt, common, |
a513088d | 1658 | &common->hash_entry); |
80b3f58c SW |
1659 | |
1660 | if (unlikely(hash_added != 0)) { | |
1661 | /* remove the reference for the hash */ | |
5dafd8a6 | 1662 | batadv_tt_global_entry_put(tt_global_entry); |
80b3f58c SW |
1663 | goto out_remove; |
1664 | } | |
a73105b8 | 1665 | } else { |
068ee6e2 | 1666 | common = &tt_global_entry->common; |
30cfd02b AQ |
1667 | /* If there is already a global entry, we can use this one for |
1668 | * our processing. | |
068ee6e2 AQ |
1669 | * But if we are trying to add a temporary client then here are |
1670 | * two options at this point: | |
1671 | * 1) the global client is not a temporary client: the global | |
1672 | * client has to be left as it is, temporary information | |
1673 | * should never override any already known client state | |
1674 | * 2) the global client is a temporary client: purge the | |
1675 | * originator list and add the new one orig_entry | |
30cfd02b | 1676 | */ |
068ee6e2 AQ |
1677 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1678 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1679 | goto out; | |
1680 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1681 | orig_node)) | |
1682 | goto out_remove; | |
1683 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1684 | goto add_orig_entry; | |
1685 | } | |
30cfd02b AQ |
1686 | |
1687 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1688 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1689 | * remove the previous temporary orig node and re-add it | |
1690 | * if required. If the orig entry changed, the new one which | |
1691 | * is a non-temporary entry is preferred. | |
30cfd02b | 1692 | */ |
a6cb3909 SW |
1693 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1694 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1695 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1696 | } | |
db08e6e5 | 1697 | |
e9c00136 AQ |
1698 | /* the change can carry possible "attribute" flags like the |
1699 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1700 | * client entry | |
1701 | */ | |
ad7e2c46 | 1702 | common->flags |= flags; |
e9c00136 | 1703 | |
acd34afa SE |
1704 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1705 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1706 | * delete + roaming change for this originator. |
1707 | * | |
1708 | * We should first delete the old originator before adding the | |
1709 | * new one. | |
1710 | */ | |
068ee6e2 | 1711 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1712 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1713 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1714 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1715 | } |
1716 | } | |
068ee6e2 | 1717 | add_orig_entry: |
30cfd02b | 1718 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1719 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1720 | |
39c75a51 | 1721 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1722 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1723 | common->addr, BATADV_PRINT_VID(common->vid), | |
1724 | orig_node->orig); | |
1e5d49fc | 1725 | ret = true; |
c6c8fea2 | 1726 | |
80b3f58c | 1727 | out_remove: |
c5caf4ef LL |
1728 | /* Do not remove multicast addresses from the local hash on |
1729 | * global additions | |
1730 | */ | |
1731 | if (is_multicast_ether_addr(tt_addr)) | |
1732 | goto out; | |
7f91d06c | 1733 | |
a73105b8 | 1734 | /* remove address from local hash if present */ |
c018ad3d | 1735 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1736 | "global tt received", |
c1d07431 | 1737 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1738 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1739 | ||
068ee6e2 AQ |
1740 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1741 | /* this is a normal global add. Therefore the client is not in a | |
1742 | * roaming state anymore. | |
1743 | */ | |
1744 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1745 | ||
7683fdc1 AQ |
1746 | out: |
1747 | if (tt_global_entry) | |
5dafd8a6 | 1748 | batadv_tt_global_entry_put(tt_global_entry); |
068ee6e2 | 1749 | if (tt_local_entry) |
95c0db90 | 1750 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 1751 | return ret; |
c6c8fea2 SE |
1752 | } |
1753 | ||
1b371d13 SW |
1754 | /** |
1755 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1756 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1757 | * @tt_global_entry: global translation table entry to be analyzed |
1758 | * | |
1759 | * This functon assumes the caller holds rcu_read_lock(). | |
62fe710f | 1760 | * Return: best originator list entry or NULL on errors. |
981d8900 SE |
1761 | */ |
1762 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1763 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1764 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1765 | { |
4627456a | 1766 | struct batadv_neigh_node *router, *best_router = NULL; |
29824a55 | 1767 | struct batadv_algo_ops *bao = bat_priv->algo_ops; |
981d8900 | 1768 | struct hlist_head *head; |
981d8900 | 1769 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1770 | |
1771 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1772 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1773 | router = batadv_orig_router_get(orig_entry->orig_node, |
1774 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1775 | if (!router) |
1776 | continue; | |
1777 | ||
4627456a | 1778 | if (best_router && |
29824a55 AQ |
1779 | bao->neigh.cmp(router, BATADV_IF_DEFAULT, best_router, |
1780 | BATADV_IF_DEFAULT) <= 0) { | |
25bb2509 | 1781 | batadv_neigh_node_put(router); |
4627456a | 1782 | continue; |
981d8900 SE |
1783 | } |
1784 | ||
4627456a AQ |
1785 | /* release the refcount for the "old" best */ |
1786 | if (best_router) | |
25bb2509 | 1787 | batadv_neigh_node_put(best_router); |
4627456a AQ |
1788 | |
1789 | best_entry = orig_entry; | |
1790 | best_router = router; | |
981d8900 SE |
1791 | } |
1792 | ||
4627456a | 1793 | if (best_router) |
25bb2509 | 1794 | batadv_neigh_node_put(best_router); |
4627456a | 1795 | |
981d8900 SE |
1796 | return best_entry; |
1797 | } | |
1798 | ||
1b371d13 SW |
1799 | /** |
1800 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1801 | * for this global entry | |
4627456a | 1802 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1803 | * @tt_global_entry: global translation table entry to be printed |
1804 | * @seq: debugfs table seq_file struct | |
1805 | * | |
1806 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1807 | */ |
a513088d | 1808 | static void |
4627456a AQ |
1809 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1810 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1811 | struct seq_file *seq) |
db08e6e5 | 1812 | { |
981d8900 | 1813 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1814 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1815 | struct batadv_orig_node_vlan *vlan; |
1816 | struct hlist_head *head; | |
6b5e971a SE |
1817 | u8 last_ttvn; |
1818 | u16 flags; | |
db08e6e5 SW |
1819 | |
1820 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1821 | flags = tt_common_entry->flags; |
1822 | ||
4627456a | 1823 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1824 | if (best_entry) { |
7ea7b4a1 AQ |
1825 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1826 | tt_common_entry->vid); | |
1827 | if (!vlan) { | |
1828 | seq_printf(seq, | |
1829 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1830 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1831 | best_entry->orig_node->orig); | |
1832 | goto print_list; | |
1833 | } | |
1834 | ||
981d8900 | 1835 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1836 | seq_printf(seq, |
dd24ddb2 | 1837 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1838 | '*', tt_global_entry->common.addr, |
16052789 | 1839 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1840 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1841 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1842 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1843 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1844 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1845 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 | 1846 | |
21754e25 | 1847 | batadv_orig_node_vlan_put(vlan); |
981d8900 | 1848 | } |
db08e6e5 | 1849 | |
7ea7b4a1 | 1850 | print_list: |
db08e6e5 SW |
1851 | head = &tt_global_entry->orig_list; |
1852 | ||
b67bfe0d | 1853 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1854 | if (best_entry == orig_entry) |
1855 | continue; | |
1856 | ||
7ea7b4a1 AQ |
1857 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1858 | tt_common_entry->vid); | |
1859 | if (!vlan) { | |
1860 | seq_printf(seq, | |
1861 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1862 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1863 | orig_entry->orig_node->orig); | |
1864 | continue; | |
1865 | } | |
1866 | ||
db08e6e5 | 1867 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1868 | seq_printf(seq, |
dd24ddb2 | 1869 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1870 | '+', tt_global_entry->common.addr, |
16052789 | 1871 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1872 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1873 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1874 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1875 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1876 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1877 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 | 1878 | |
21754e25 | 1879 | batadv_orig_node_vlan_put(vlan); |
db08e6e5 SW |
1880 | } |
1881 | } | |
1882 | ||
08c36d3e | 1883 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1884 | { |
1885 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1886 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1887 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1888 | struct batadv_tt_common_entry *tt_common_entry; |
1889 | struct batadv_tt_global_entry *tt_global; | |
1890 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1891 | struct hlist_head *head; |
6b5e971a | 1892 | u32 i; |
c6c8fea2 | 1893 | |
30da63a6 ML |
1894 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1895 | if (!primary_if) | |
32ae9b22 | 1896 | goto out; |
c6c8fea2 | 1897 | |
2dafb49d AQ |
1898 | seq_printf(seq, |
1899 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1900 | net_dev->name); |
925a6f37 AQ |
1901 | seq_puts(seq, |
1902 | " Client VID (TTVN) Originator (Curr TTVN) (CRC ) Flags\n"); | |
c6c8fea2 | 1903 | |
c6c8fea2 SE |
1904 | for (i = 0; i < hash->size; i++) { |
1905 | head = &hash->table[i]; | |
1906 | ||
7aadf889 | 1907 | rcu_read_lock(); |
b67bfe0d | 1908 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1909 | head, hash_entry) { |
56303d34 SE |
1910 | tt_global = container_of(tt_common_entry, |
1911 | struct batadv_tt_global_entry, | |
1912 | common); | |
4627456a | 1913 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1914 | } |
7aadf889 | 1915 | rcu_read_unlock(); |
c6c8fea2 | 1916 | } |
32ae9b22 ML |
1917 | out: |
1918 | if (primary_if) | |
82047ad7 | 1919 | batadv_hardif_put(primary_if); |
30da63a6 | 1920 | return 0; |
c6c8fea2 SE |
1921 | } |
1922 | ||
d34f0550 MS |
1923 | /** |
1924 | * batadv_tt_global_dump_subentry - Dump all TT local entries into a message | |
1925 | * @msg: Netlink message to dump into | |
1926 | * @portid: Port making netlink request | |
1927 | * @seq: Sequence number of netlink message | |
1928 | * @common: tt local & tt global common data | |
1929 | * @orig: Originator node announcing a non-mesh client | |
1930 | * @best: Is the best originator for the TT entry | |
1931 | * | |
1932 | * Return: Error code, or 0 on success | |
1933 | */ | |
1934 | static int | |
1935 | batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, | |
1936 | struct batadv_tt_common_entry *common, | |
1937 | struct batadv_tt_orig_list_entry *orig, | |
1938 | bool best) | |
1939 | { | |
1940 | void *hdr; | |
1941 | struct batadv_orig_node_vlan *vlan; | |
1942 | u8 last_ttvn; | |
1943 | u32 crc; | |
1944 | ||
1945 | vlan = batadv_orig_node_vlan_get(orig->orig_node, | |
1946 | common->vid); | |
1947 | if (!vlan) | |
1948 | return 0; | |
1949 | ||
1950 | crc = vlan->tt.crc; | |
1951 | ||
1952 | batadv_orig_node_vlan_put(vlan); | |
1953 | ||
1954 | hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, | |
1955 | NLM_F_MULTI, | |
1956 | BATADV_CMD_GET_TRANSTABLE_GLOBAL); | |
1957 | if (!hdr) | |
1958 | return -ENOBUFS; | |
1959 | ||
1960 | last_ttvn = atomic_read(&orig->orig_node->last_ttvn); | |
1961 | ||
1962 | if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || | |
1963 | nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, | |
1964 | orig->orig_node->orig) || | |
1965 | nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) || | |
1966 | nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) || | |
1967 | nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || | |
1968 | nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || | |
1969 | nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) | |
1970 | goto nla_put_failure; | |
1971 | ||
1972 | if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) | |
1973 | goto nla_put_failure; | |
1974 | ||
1975 | genlmsg_end(msg, hdr); | |
1976 | return 0; | |
1977 | ||
1978 | nla_put_failure: | |
1979 | genlmsg_cancel(msg, hdr); | |
1980 | return -EMSGSIZE; | |
1981 | } | |
1982 | ||
1983 | /** | |
1984 | * batadv_tt_global_dump_entry - Dump one TT global entry into a message | |
1985 | * @msg: Netlink message to dump into | |
1986 | * @portid: Port making netlink request | |
1987 | * @seq: Sequence number of netlink message | |
1988 | * @bat_priv: The bat priv with all the soft interface information | |
1989 | * @common: tt local & tt global common data | |
1990 | * @sub_s: Number of entries to skip | |
1991 | * | |
1992 | * This function assumes the caller holds rcu_read_lock(). | |
1993 | * | |
1994 | * Return: Error code, or 0 on success | |
1995 | */ | |
1996 | static int | |
1997 | batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, | |
1998 | struct batadv_priv *bat_priv, | |
1999 | struct batadv_tt_common_entry *common, int *sub_s) | |
2000 | { | |
2001 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; | |
2002 | struct batadv_tt_global_entry *global; | |
2003 | struct hlist_head *head; | |
2004 | int sub = 0; | |
2005 | bool best; | |
2006 | ||
2007 | global = container_of(common, struct batadv_tt_global_entry, common); | |
2008 | best_entry = batadv_transtable_best_orig(bat_priv, global); | |
2009 | head = &global->orig_list; | |
2010 | ||
2011 | hlist_for_each_entry_rcu(orig_entry, head, list) { | |
2012 | if (sub++ < *sub_s) | |
2013 | continue; | |
2014 | ||
2015 | best = (orig_entry == best_entry); | |
2016 | ||
2017 | if (batadv_tt_global_dump_subentry(msg, portid, seq, common, | |
2018 | orig_entry, best)) { | |
2019 | *sub_s = sub - 1; | |
2020 | return -EMSGSIZE; | |
2021 | } | |
2022 | } | |
2023 | ||
2024 | *sub_s = 0; | |
2025 | return 0; | |
2026 | } | |
2027 | ||
2028 | /** | |
2029 | * batadv_tt_global_dump_bucket - Dump one TT local bucket into a message | |
2030 | * @msg: Netlink message to dump into | |
2031 | * @portid: Port making netlink request | |
2032 | * @seq: Sequence number of netlink message | |
2033 | * @bat_priv: The bat priv with all the soft interface information | |
2034 | * @head: Pointer to the list containing the global tt entries | |
2035 | * @idx_s: Number of entries to skip | |
2036 | * @sub: Number of entries to skip | |
2037 | * | |
2038 | * Return: Error code, or 0 on success | |
2039 | */ | |
2040 | static int | |
2041 | batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, | |
2042 | struct batadv_priv *bat_priv, | |
2043 | struct hlist_head *head, int *idx_s, int *sub) | |
2044 | { | |
2045 | struct batadv_tt_common_entry *common; | |
2046 | int idx = 0; | |
2047 | ||
2048 | rcu_read_lock(); | |
2049 | hlist_for_each_entry_rcu(common, head, hash_entry) { | |
2050 | if (idx++ < *idx_s) | |
2051 | continue; | |
2052 | ||
2053 | if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv, | |
2054 | common, sub)) { | |
2055 | rcu_read_unlock(); | |
2056 | *idx_s = idx - 1; | |
2057 | return -EMSGSIZE; | |
2058 | } | |
2059 | } | |
2060 | rcu_read_unlock(); | |
2061 | ||
2062 | *idx_s = 0; | |
2063 | *sub = 0; | |
2064 | return 0; | |
2065 | } | |
2066 | ||
2067 | /** | |
2068 | * batadv_tt_global_dump - Dump TT global entries into a message | |
2069 | * @msg: Netlink message to dump into | |
2070 | * @cb: Parameters from query | |
2071 | * | |
2072 | * Return: Error code, or length of message on success | |
2073 | */ | |
2074 | int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
2075 | { | |
2076 | struct net *net = sock_net(cb->skb->sk); | |
2077 | struct net_device *soft_iface; | |
2078 | struct batadv_priv *bat_priv; | |
2079 | struct batadv_hard_iface *primary_if = NULL; | |
2080 | struct batadv_hashtable *hash; | |
2081 | struct hlist_head *head; | |
2082 | int ret; | |
2083 | int ifindex; | |
2084 | int bucket = cb->args[0]; | |
2085 | int idx = cb->args[1]; | |
2086 | int sub = cb->args[2]; | |
2087 | int portid = NETLINK_CB(cb->skb).portid; | |
2088 | ||
2089 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
2090 | if (!ifindex) | |
2091 | return -EINVAL; | |
2092 | ||
2093 | soft_iface = dev_get_by_index(net, ifindex); | |
2094 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
2095 | ret = -ENODEV; | |
2096 | goto out; | |
2097 | } | |
2098 | ||
2099 | bat_priv = netdev_priv(soft_iface); | |
2100 | ||
2101 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2102 | if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { | |
2103 | ret = -ENOENT; | |
2104 | goto out; | |
2105 | } | |
2106 | ||
2107 | hash = bat_priv->tt.global_hash; | |
2108 | ||
2109 | while (bucket < hash->size) { | |
2110 | head = &hash->table[bucket]; | |
2111 | ||
2112 | if (batadv_tt_global_dump_bucket(msg, portid, | |
2113 | cb->nlh->nlmsg_seq, bat_priv, | |
2114 | head, &idx, &sub)) | |
2115 | break; | |
2116 | ||
2117 | bucket++; | |
2118 | } | |
2119 | ||
2120 | ret = msg->len; | |
2121 | ||
2122 | out: | |
2123 | if (primary_if) | |
2124 | batadv_hardif_put(primary_if); | |
2125 | if (soft_iface) | |
2126 | dev_put(soft_iface); | |
2127 | ||
2128 | cb->args[0] = bucket; | |
2129 | cb->args[1] = idx; | |
2130 | cb->args[2] = sub; | |
2131 | ||
2132 | return ret; | |
2133 | } | |
2134 | ||
1d8ab8d3 | 2135 | /** |
433ff98f | 2136 | * _batadv_tt_global_del_orig_entry - remove and free an orig_entry |
1d8ab8d3 LL |
2137 | * @tt_global_entry: the global entry to remove the orig_entry from |
2138 | * @orig_entry: the orig entry to remove and free | |
2139 | * | |
2140 | * Remove an orig_entry from its list in the given tt_global_entry and | |
2141 | * free this orig_entry afterwards. | |
433ff98f ML |
2142 | * |
2143 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
2144 | * part of a list. | |
1d8ab8d3 LL |
2145 | */ |
2146 | static void | |
433ff98f ML |
2147 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
2148 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 2149 | { |
2c72d655 SE |
2150 | lockdep_assert_held(&tt_global_entry->list_lock); |
2151 | ||
1d8ab8d3 LL |
2152 | batadv_tt_global_size_dec(orig_entry->orig_node, |
2153 | tt_global_entry->common.vid); | |
2154 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
2155 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
2156 | * being part of a list | |
2157 | */ | |
1d8ab8d3 | 2158 | hlist_del_rcu(&orig_entry->list); |
7e2366c6 | 2159 | batadv_tt_orig_list_entry_put(orig_entry); |
1d8ab8d3 LL |
2160 | } |
2161 | ||
db08e6e5 | 2162 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 2163 | static void |
56303d34 | 2164 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 2165 | { |
db08e6e5 | 2166 | struct hlist_head *head; |
b67bfe0d | 2167 | struct hlist_node *safe; |
56303d34 | 2168 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 2169 | |
db08e6e5 SW |
2170 | spin_lock_bh(&tt_global_entry->list_lock); |
2171 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 2172 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 2173 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 2174 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
2175 | } |
2176 | ||
1d8ab8d3 LL |
2177 | /** |
2178 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
2179 | * @bat_priv: the bat priv with all the soft interface information | |
2180 | * @tt_global_entry: the global entry to remove the orig_node from | |
2181 | * @orig_node: the originator announcing the client | |
2182 | * @message: message to append to the log on deletion | |
2183 | * | |
2184 | * Remove the given orig_node and its according orig_entry from the given | |
2185 | * global tt entry. | |
2186 | */ | |
a513088d | 2187 | static void |
1d8ab8d3 LL |
2188 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
2189 | struct batadv_tt_global_entry *tt_global_entry, | |
2190 | struct batadv_orig_node *orig_node, | |
2191 | const char *message) | |
db08e6e5 SW |
2192 | { |
2193 | struct hlist_head *head; | |
b67bfe0d | 2194 | struct hlist_node *safe; |
56303d34 | 2195 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 2196 | unsigned short vid; |
db08e6e5 SW |
2197 | |
2198 | spin_lock_bh(&tt_global_entry->list_lock); | |
2199 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 2200 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 2201 | if (orig_entry->orig_node == orig_node) { |
16052789 | 2202 | vid = tt_global_entry->common.vid; |
39c75a51 | 2203 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 2204 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 2205 | orig_node->orig, |
16052789 AQ |
2206 | tt_global_entry->common.addr, |
2207 | BATADV_PRINT_VID(vid), message); | |
433ff98f ML |
2208 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
2209 | orig_entry); | |
db08e6e5 SW |
2210 | } |
2211 | } | |
2212 | spin_unlock_bh(&tt_global_entry->list_lock); | |
2213 | } | |
2214 | ||
db08e6e5 | 2215 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
2216 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
2217 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 2218 | */ |
a513088d | 2219 | static void |
56303d34 SE |
2220 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
2221 | struct batadv_tt_global_entry *tt_global_entry, | |
2222 | struct batadv_orig_node *orig_node, | |
2223 | const char *message) | |
db08e6e5 SW |
2224 | { |
2225 | bool last_entry = true; | |
2226 | struct hlist_head *head; | |
56303d34 | 2227 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
2228 | |
2229 | /* no local entry exists, case 1: | |
2230 | * Check if this is the last one or if other entries exist. | |
2231 | */ | |
2232 | ||
2233 | rcu_read_lock(); | |
2234 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 2235 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
2236 | if (orig_entry->orig_node != orig_node) { |
2237 | last_entry = false; | |
2238 | break; | |
2239 | } | |
2240 | } | |
2241 | rcu_read_unlock(); | |
2242 | ||
2243 | if (last_entry) { | |
2244 | /* its the last one, mark for roaming. */ | |
acd34afa | 2245 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
2246 | tt_global_entry->roam_at = jiffies; |
2247 | } else | |
2248 | /* there is another entry, we can simply delete this | |
2249 | * one and can still use the other one. | |
2250 | */ | |
1d8ab8d3 LL |
2251 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
2252 | orig_node, message); | |
db08e6e5 SW |
2253 | } |
2254 | ||
c018ad3d AQ |
2255 | /** |
2256 | * batadv_tt_global_del - remove a client from the global table | |
2257 | * @bat_priv: the bat priv with all the soft interface information | |
2258 | * @orig_node: an originator serving this client | |
2259 | * @addr: the mac address of the client | |
2260 | * @vid: VLAN identifier | |
2261 | * @message: a message explaining the reason for deleting the client to print | |
2262 | * for debugging purpose | |
2263 | * @roaming: true if the deletion has been triggered by a roaming event | |
2264 | */ | |
56303d34 SE |
2265 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
2266 | struct batadv_orig_node *orig_node, | |
c018ad3d | 2267 | const unsigned char *addr, unsigned short vid, |
a513088d | 2268 | const char *message, bool roaming) |
a73105b8 | 2269 | { |
170173bf | 2270 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 2271 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 2272 | |
c018ad3d | 2273 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 2274 | if (!tt_global_entry) |
7683fdc1 | 2275 | goto out; |
a73105b8 | 2276 | |
db08e6e5 | 2277 | if (!roaming) { |
1d8ab8d3 LL |
2278 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
2279 | orig_node, message); | |
db08e6e5 SW |
2280 | |
2281 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
2282 | batadv_tt_global_free(bat_priv, tt_global_entry, |
2283 | message); | |
db08e6e5 SW |
2284 | |
2285 | goto out; | |
2286 | } | |
92f90f56 SE |
2287 | |
2288 | /* if we are deleting a global entry due to a roam | |
2289 | * event, there are two possibilities: | |
db08e6e5 SW |
2290 | * 1) the client roamed from node A to node B => if there |
2291 | * is only one originator left for this client, we mark | |
acd34afa | 2292 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
2293 | * wait for node B to claim it. In case of timeout |
2294 | * the entry is purged. | |
db08e6e5 SW |
2295 | * |
2296 | * If there are other originators left, we directly delete | |
2297 | * the originator. | |
92f90f56 | 2298 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
2299 | * the global entry, since it is useless now. |
2300 | */ | |
a513088d | 2301 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
2302 | tt_global_entry->common.addr, |
2303 | vid); | |
a513088d | 2304 | if (local_entry) { |
db08e6e5 | 2305 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 2306 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 2307 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
2308 | } else |
2309 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
2310 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
2311 | orig_node, message); | |
92f90f56 | 2312 | |
cc47f66e | 2313 | out: |
7683fdc1 | 2314 | if (tt_global_entry) |
5dafd8a6 | 2315 | batadv_tt_global_entry_put(tt_global_entry); |
a513088d | 2316 | if (local_entry) |
95c0db90 | 2317 | batadv_tt_local_entry_put(local_entry); |
a73105b8 AQ |
2318 | } |
2319 | ||
95fb130d AQ |
2320 | /** |
2321 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
2322 | * given originator matching the provided vid | |
2323 | * @bat_priv: the bat priv with all the soft interface information | |
2324 | * @orig_node: the originator owning the entries to remove | |
2325 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
2326 | * removed | |
2327 | * @message: debug message to print as "reason" | |
2328 | */ | |
56303d34 SE |
2329 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
2330 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2331 | s32 match_vid, |
56303d34 | 2332 | const char *message) |
c6c8fea2 | 2333 | { |
56303d34 SE |
2334 | struct batadv_tt_global_entry *tt_global; |
2335 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 2336 | u32 i; |
807736f6 | 2337 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 2338 | struct hlist_node *safe; |
a73105b8 | 2339 | struct hlist_head *head; |
7683fdc1 | 2340 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 2341 | unsigned short vid; |
c6c8fea2 | 2342 | |
6e801494 SW |
2343 | if (!hash) |
2344 | return; | |
2345 | ||
a73105b8 AQ |
2346 | for (i = 0; i < hash->size; i++) { |
2347 | head = &hash->table[i]; | |
7683fdc1 | 2348 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 2349 | |
7683fdc1 | 2350 | spin_lock_bh(list_lock); |
b67bfe0d | 2351 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 2352 | head, hash_entry) { |
95fb130d AQ |
2353 | /* remove only matching entries */ |
2354 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
2355 | continue; | |
2356 | ||
56303d34 SE |
2357 | tt_global = container_of(tt_common_entry, |
2358 | struct batadv_tt_global_entry, | |
2359 | common); | |
db08e6e5 | 2360 | |
1d8ab8d3 LL |
2361 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
2362 | orig_node, message); | |
db08e6e5 | 2363 | |
56303d34 | 2364 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 2365 | vid = tt_global->common.vid; |
39c75a51 | 2366 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2367 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2368 | tt_global->common.addr, | |
2369 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 2370 | hlist_del_rcu(&tt_common_entry->hash_entry); |
5dafd8a6 | 2371 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 | 2372 | } |
a73105b8 | 2373 | } |
7683fdc1 | 2374 | spin_unlock_bh(list_lock); |
c6c8fea2 | 2375 | } |
ac4eebd4 | 2376 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
2377 | } |
2378 | ||
30cfd02b AQ |
2379 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
2380 | char **msg) | |
cc47f66e | 2381 | { |
30cfd02b AQ |
2382 | bool purge = false; |
2383 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
2384 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 2385 | |
30cfd02b AQ |
2386 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
2387 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
2388 | purge = true; | |
2389 | *msg = "Roaming timeout\n"; | |
2390 | } | |
42d0b044 | 2391 | |
30cfd02b AQ |
2392 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
2393 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
2394 | purge = true; | |
2395 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 2396 | } |
30cfd02b AQ |
2397 | |
2398 | return purge; | |
42d0b044 SE |
2399 | } |
2400 | ||
30cfd02b | 2401 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 2402 | { |
807736f6 | 2403 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 2404 | struct hlist_head *head; |
b67bfe0d | 2405 | struct hlist_node *node_tmp; |
7683fdc1 | 2406 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 2407 | u32 i; |
30cfd02b AQ |
2408 | char *msg = NULL; |
2409 | struct batadv_tt_common_entry *tt_common; | |
2410 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 2411 | |
cc47f66e AQ |
2412 | for (i = 0; i < hash->size; i++) { |
2413 | head = &hash->table[i]; | |
7683fdc1 | 2414 | list_lock = &hash->list_locks[i]; |
cc47f66e | 2415 | |
7683fdc1 | 2416 | spin_lock_bh(list_lock); |
b67bfe0d | 2417 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
2418 | hash_entry) { |
2419 | tt_global = container_of(tt_common, | |
2420 | struct batadv_tt_global_entry, | |
2421 | common); | |
2422 | ||
2423 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
2424 | continue; | |
2425 | ||
2426 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
2427 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2428 | tt_global->common.addr, | |
2429 | BATADV_PRINT_VID(tt_global->common.vid), | |
2430 | msg); | |
30cfd02b | 2431 | |
b67bfe0d | 2432 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b | 2433 | |
5dafd8a6 | 2434 | batadv_tt_global_entry_put(tt_global); |
30cfd02b | 2435 | } |
7683fdc1 | 2436 | spin_unlock_bh(list_lock); |
cc47f66e | 2437 | } |
cc47f66e AQ |
2438 | } |
2439 | ||
56303d34 | 2440 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 2441 | { |
5bf74e9c | 2442 | struct batadv_hashtable *hash; |
7683fdc1 | 2443 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
2444 | struct batadv_tt_common_entry *tt_common_entry; |
2445 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 2446 | struct hlist_node *node_tmp; |
7683fdc1 | 2447 | struct hlist_head *head; |
6b5e971a | 2448 | u32 i; |
7683fdc1 | 2449 | |
807736f6 | 2450 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
2451 | return; |
2452 | ||
807736f6 | 2453 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
2454 | |
2455 | for (i = 0; i < hash->size; i++) { | |
2456 | head = &hash->table[i]; | |
2457 | list_lock = &hash->list_locks[i]; | |
2458 | ||
2459 | spin_lock_bh(list_lock); | |
b67bfe0d | 2460 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 2461 | head, hash_entry) { |
b67bfe0d | 2462 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
2463 | tt_global = container_of(tt_common_entry, |
2464 | struct batadv_tt_global_entry, | |
2465 | common); | |
5dafd8a6 | 2466 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 AQ |
2467 | } |
2468 | spin_unlock_bh(list_lock); | |
2469 | } | |
2470 | ||
1a8eaf07 | 2471 | batadv_hash_destroy(hash); |
7683fdc1 | 2472 | |
807736f6 | 2473 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2474 | } |
2475 | ||
56303d34 SE |
2476 | static bool |
2477 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2478 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
2479 | { |
2480 | bool ret = false; | |
2481 | ||
acd34afa SE |
2482 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2483 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
2484 | ret = true; |
2485 | ||
2d2fcc2a AQ |
2486 | /* check if the two clients are marked as isolated */ |
2487 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2488 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
2489 | ret = true; | |
2490 | ||
59b699cd AQ |
2491 | return ret; |
2492 | } | |
2493 | ||
c018ad3d AQ |
2494 | /** |
2495 | * batadv_transtable_search - get the mesh destination for a given client | |
2496 | * @bat_priv: the bat priv with all the soft interface information | |
2497 | * @src: mac address of the source client | |
2498 | * @addr: mac address of the destination client | |
2499 | * @vid: VLAN identifier | |
2500 | * | |
62fe710f | 2501 | * Return: a pointer to the originator that was selected as destination in the |
c018ad3d AQ |
2502 | * mesh for contacting the client 'addr', NULL otherwise. |
2503 | * In case of multiple originators serving the same client, the function returns | |
2504 | * the best one (best in terms of metric towards the destination node). | |
2505 | * | |
2506 | * If the two clients are AP isolated the function returns NULL. | |
2507 | */ | |
56303d34 | 2508 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2509 | const u8 *src, |
2510 | const u8 *addr, | |
c018ad3d | 2511 | unsigned short vid) |
c6c8fea2 | 2512 | { |
56303d34 SE |
2513 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2514 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2515 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2516 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2517 | |
eceb22ae | 2518 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2519 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2520 | if (!tt_local_entry || |
2521 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2522 | goto out; |
2523 | } | |
7aadf889 | 2524 | |
c018ad3d | 2525 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2526 | if (!tt_global_entry) |
7b36e8ee | 2527 | goto out; |
7aadf889 | 2528 | |
3d393e47 | 2529 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2530 | * isolation |
2531 | */ | |
a513088d SE |
2532 | if (tt_local_entry && |
2533 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2534 | goto out; |
2535 | ||
db08e6e5 | 2536 | rcu_read_lock(); |
4627456a | 2537 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2538 | /* found anything? */ |
981d8900 SE |
2539 | if (best_entry) |
2540 | orig_node = best_entry->orig_node; | |
7c124391 | 2541 | if (orig_node && !kref_get_unless_zero(&orig_node->refcount)) |
db08e6e5 SW |
2542 | orig_node = NULL; |
2543 | rcu_read_unlock(); | |
981d8900 | 2544 | |
7b36e8ee | 2545 | out: |
3d393e47 | 2546 | if (tt_global_entry) |
5dafd8a6 | 2547 | batadv_tt_global_entry_put(tt_global_entry); |
3d393e47 | 2548 | if (tt_local_entry) |
95c0db90 | 2549 | batadv_tt_local_entry_put(tt_local_entry); |
3d393e47 | 2550 | |
7b36e8ee | 2551 | return orig_node; |
c6c8fea2 | 2552 | } |
a73105b8 | 2553 | |
ced72933 AQ |
2554 | /** |
2555 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2556 | * to the given orig_node | |
2557 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2558 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2559 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2560 | * |
2561 | * This function computes the checksum for the global table corresponding to a | |
2562 | * specific originator. In particular, the checksum is computed as follows: For | |
2563 | * each client connected to the originator the CRC32C of the MAC address and the | |
2564 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2565 | * together. | |
2566 | * | |
2567 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2568 | * produce a unique hash of the table, but since the order which is used to feed | |
2569 | * the CRC32C function affects the result and since every node in the network | |
2570 | * probably sorts the clients differently, the hash function cannot be directly | |
2571 | * computed over the entire table. Hence the CRC32C is used only on | |
2572 | * the single client entry, while all the results are then xor'ed together | |
2573 | * because the XOR operation can combine them all while trying to reduce the | |
2574 | * noise as much as possible. | |
2575 | * | |
62fe710f | 2576 | * Return: the checksum of the global table of a given originator. |
ced72933 | 2577 | */ |
6b5e971a SE |
2578 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2579 | struct batadv_orig_node *orig_node, | |
2580 | unsigned short vid) | |
a73105b8 | 2581 | { |
807736f6 | 2582 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2583 | struct batadv_tt_common_entry *tt_common; |
2584 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2585 | struct hlist_head *head; |
6b5e971a SE |
2586 | u32 i, crc_tmp, crc = 0; |
2587 | u8 flags; | |
a30e22ca | 2588 | __be16 tmp_vid; |
a73105b8 AQ |
2589 | |
2590 | for (i = 0; i < hash->size; i++) { | |
2591 | head = &hash->table[i]; | |
2592 | ||
2593 | rcu_read_lock(); | |
b67bfe0d | 2594 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2595 | tt_global = container_of(tt_common, |
2596 | struct batadv_tt_global_entry, | |
2597 | common); | |
7ea7b4a1 AQ |
2598 | /* compute the CRC only for entries belonging to the |
2599 | * VLAN identified by the vid passed as parameter | |
2600 | */ | |
2601 | if (tt_common->vid != vid) | |
2602 | continue; | |
2603 | ||
db08e6e5 SW |
2604 | /* Roaming clients are in the global table for |
2605 | * consistency only. They don't have to be | |
2606 | * taken into account while computing the | |
2607 | * global crc | |
2608 | */ | |
acd34afa | 2609 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2610 | continue; |
30cfd02b AQ |
2611 | /* Temporary clients have not been announced yet, so |
2612 | * they have to be skipped while computing the global | |
2613 | * crc | |
2614 | */ | |
2615 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2616 | continue; | |
db08e6e5 SW |
2617 | |
2618 | /* find out if this global entry is announced by this | |
2619 | * originator | |
2620 | */ | |
56303d34 | 2621 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2622 | orig_node)) |
db08e6e5 SW |
2623 | continue; |
2624 | ||
a30e22ca AQ |
2625 | /* use network order to read the VID: this ensures that |
2626 | * every node reads the bytes in the same order. | |
2627 | */ | |
2628 | tmp_vid = htons(tt_common->vid); | |
2629 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2630 | |
2631 | /* compute the CRC on flags that have to be kept in sync | |
2632 | * among nodes | |
2633 | */ | |
2634 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2635 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2636 | ||
0ffa9e8d | 2637 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2638 | } |
2639 | rcu_read_unlock(); | |
2640 | } | |
2641 | ||
ced72933 | 2642 | return crc; |
a73105b8 AQ |
2643 | } |
2644 | ||
ced72933 AQ |
2645 | /** |
2646 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2647 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2648 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2649 | * |
2650 | * For details about the computation, please refer to the documentation for | |
2651 | * batadv_tt_global_crc(). | |
2652 | * | |
62fe710f | 2653 | * Return: the checksum of the local table |
ced72933 | 2654 | */ |
6b5e971a SE |
2655 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2656 | unsigned short vid) | |
a73105b8 | 2657 | { |
807736f6 | 2658 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2659 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2660 | struct hlist_head *head; |
6b5e971a SE |
2661 | u32 i, crc_tmp, crc = 0; |
2662 | u8 flags; | |
a30e22ca | 2663 | __be16 tmp_vid; |
a73105b8 AQ |
2664 | |
2665 | for (i = 0; i < hash->size; i++) { | |
2666 | head = &hash->table[i]; | |
2667 | ||
2668 | rcu_read_lock(); | |
b67bfe0d | 2669 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2670 | /* compute the CRC only for entries belonging to the |
2671 | * VLAN identified by vid | |
2672 | */ | |
2673 | if (tt_common->vid != vid) | |
2674 | continue; | |
2675 | ||
058d0e26 | 2676 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2677 | * account while computing the CRC |
2678 | */ | |
acd34afa | 2679 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2680 | continue; |
ced72933 | 2681 | |
a30e22ca AQ |
2682 | /* use network order to read the VID: this ensures that |
2683 | * every node reads the bytes in the same order. | |
2684 | */ | |
2685 | tmp_vid = htons(tt_common->vid); | |
2686 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2687 | |
2688 | /* compute the CRC on flags that have to be kept in sync | |
2689 | * among nodes | |
2690 | */ | |
2691 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2692 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2693 | ||
0ffa9e8d | 2694 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2695 | } |
a73105b8 AQ |
2696 | rcu_read_unlock(); |
2697 | } | |
2698 | ||
ced72933 | 2699 | return crc; |
a73105b8 AQ |
2700 | } |
2701 | ||
9c4604a2 SE |
2702 | /** |
2703 | * batadv_tt_req_node_release - free tt_req node entry | |
2704 | * @ref: kref pointer of the tt req_node entry | |
2705 | */ | |
2706 | static void batadv_tt_req_node_release(struct kref *ref) | |
2707 | { | |
2708 | struct batadv_tt_req_node *tt_req_node; | |
2709 | ||
2710 | tt_req_node = container_of(ref, struct batadv_tt_req_node, refcount); | |
2711 | ||
86452f81 | 2712 | kmem_cache_free(batadv_tt_req_cache, tt_req_node); |
9c4604a2 SE |
2713 | } |
2714 | ||
2715 | /** | |
2716 | * batadv_tt_req_node_put - decrement the tt_req_node refcounter and | |
2717 | * possibly release it | |
2718 | * @tt_req_node: tt_req_node to be free'd | |
2719 | */ | |
2720 | static void batadv_tt_req_node_put(struct batadv_tt_req_node *tt_req_node) | |
2721 | { | |
2722 | kref_put(&tt_req_node->refcount, batadv_tt_req_node_release); | |
2723 | } | |
2724 | ||
56303d34 | 2725 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2726 | { |
7c26a53b ML |
2727 | struct batadv_tt_req_node *node; |
2728 | struct hlist_node *safe; | |
a73105b8 | 2729 | |
807736f6 | 2730 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2731 | |
7c26a53b ML |
2732 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2733 | hlist_del_init(&node->list); | |
9c4604a2 | 2734 | batadv_tt_req_node_put(node); |
a73105b8 AQ |
2735 | } |
2736 | ||
807736f6 | 2737 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2738 | } |
2739 | ||
56303d34 SE |
2740 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2741 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2742 | const void *tt_buff, |
6b5e971a | 2743 | u16 tt_buff_len) |
a73105b8 | 2744 | { |
a73105b8 | 2745 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2746 | * last OGM (the OGM could carry no changes) |
2747 | */ | |
a73105b8 AQ |
2748 | spin_lock_bh(&orig_node->tt_buff_lock); |
2749 | if (tt_buff_len > 0) { | |
2750 | kfree(orig_node->tt_buff); | |
2751 | orig_node->tt_buff_len = 0; | |
2752 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2753 | if (orig_node->tt_buff) { | |
2754 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2755 | orig_node->tt_buff_len = tt_buff_len; | |
2756 | } | |
2757 | } | |
2758 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2759 | } | |
2760 | ||
56303d34 | 2761 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2762 | { |
7c26a53b ML |
2763 | struct batadv_tt_req_node *node; |
2764 | struct hlist_node *safe; | |
a73105b8 | 2765 | |
807736f6 | 2766 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2767 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2768 | if (batadv_has_timed_out(node->issued_at, |
2769 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2770 | hlist_del_init(&node->list); |
9c4604a2 | 2771 | batadv_tt_req_node_put(node); |
a73105b8 AQ |
2772 | } |
2773 | } | |
807736f6 | 2774 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2775 | } |
2776 | ||
383b8636 ML |
2777 | /** |
2778 | * batadv_tt_req_node_new - search and possibly create a tt_req_node object | |
2779 | * @bat_priv: the bat priv with all the soft interface information | |
2780 | * @orig_node: orig node this request is being issued for | |
2781 | * | |
62fe710f | 2782 | * Return: the pointer to the new tt_req_node struct if no request |
383b8636 | 2783 | * has already been issued for this orig_node, NULL otherwise. |
9cfc7bd6 | 2784 | */ |
56303d34 | 2785 | static struct batadv_tt_req_node * |
383b8636 | 2786 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2787 | struct batadv_orig_node *orig_node) |
a73105b8 | 2788 | { |
56303d34 | 2789 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2790 | |
807736f6 | 2791 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2792 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2793 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2794 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2795 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2796 | goto unlock; |
2797 | } | |
2798 | ||
86452f81 | 2799 | tt_req_node = kmem_cache_alloc(batadv_tt_req_cache, GFP_ATOMIC); |
a73105b8 AQ |
2800 | if (!tt_req_node) |
2801 | goto unlock; | |
2802 | ||
9c4604a2 | 2803 | kref_init(&tt_req_node->refcount); |
8fdd0153 | 2804 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2805 | tt_req_node->issued_at = jiffies; |
2806 | ||
9c4604a2 | 2807 | kref_get(&tt_req_node->refcount); |
7c26a53b | 2808 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2809 | unlock: |
807736f6 | 2810 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2811 | return tt_req_node; |
2812 | } | |
2813 | ||
335fbe0f ML |
2814 | /** |
2815 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2816 | * @entry_ptr: to be checked local tt entry | |
2817 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2818 | * | |
4b426b10 | 2819 | * Return: true if the entry is a valid, false otherwise. |
335fbe0f | 2820 | */ |
4b426b10 | 2821 | static bool batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) |
058d0e26 | 2822 | { |
56303d34 | 2823 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2824 | |
acd34afa | 2825 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
4b426b10 SE |
2826 | return false; |
2827 | return true; | |
058d0e26 AQ |
2828 | } |
2829 | ||
4b426b10 SE |
2830 | static bool batadv_tt_global_valid(const void *entry_ptr, |
2831 | const void *data_ptr) | |
a73105b8 | 2832 | { |
56303d34 SE |
2833 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2834 | const struct batadv_tt_global_entry *tt_global_entry; | |
2835 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2836 | |
30cfd02b AQ |
2837 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2838 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
4b426b10 | 2839 | return false; |
cc47f66e | 2840 | |
56303d34 SE |
2841 | tt_global_entry = container_of(tt_common_entry, |
2842 | struct batadv_tt_global_entry, | |
48100bac AQ |
2843 | common); |
2844 | ||
a513088d | 2845 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2846 | } |
2847 | ||
335fbe0f | 2848 | /** |
7ea7b4a1 AQ |
2849 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2850 | * specified tt hash | |
335fbe0f ML |
2851 | * @bat_priv: the bat priv with all the soft interface information |
2852 | * @hash: hash table containing the tt entries | |
2853 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2854 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2855 | * @valid_cb: function to filter tt change entries |
2856 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2857 | */ |
7ea7b4a1 AQ |
2858 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2859 | struct batadv_hashtable *hash, | |
6b5e971a | 2860 | void *tvlv_buff, u16 tt_len, |
4b426b10 SE |
2861 | bool (*valid_cb)(const void *, |
2862 | const void *), | |
7ea7b4a1 | 2863 | void *cb_data) |
a73105b8 | 2864 | { |
56303d34 | 2865 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2866 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2867 | struct hlist_head *head; |
6b5e971a SE |
2868 | u16 tt_tot, tt_num_entries = 0; |
2869 | u32 i; | |
a73105b8 | 2870 | |
298e6e68 | 2871 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2872 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2873 | |
2874 | rcu_read_lock(); | |
2875 | for (i = 0; i < hash->size; i++) { | |
2876 | head = &hash->table[i]; | |
2877 | ||
b67bfe0d | 2878 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2879 | head, hash_entry) { |
335fbe0f | 2880 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2881 | break; |
2882 | ||
48100bac | 2883 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2884 | continue; |
2885 | ||
8fdd0153 | 2886 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2887 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2888 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2889 | memset(tt_change->reserved, 0, |
2890 | sizeof(tt_change->reserved)); | |
a73105b8 | 2891 | |
335fbe0f | 2892 | tt_num_entries++; |
a73105b8 AQ |
2893 | tt_change++; |
2894 | } | |
2895 | } | |
2896 | rcu_read_unlock(); | |
7ea7b4a1 | 2897 | } |
a73105b8 | 2898 | |
7ea7b4a1 AQ |
2899 | /** |
2900 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2901 | * @orig_node: originator for which the CRCs have to be checked | |
2902 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2903 | * @num_vlan: number of tvlv VLAN entries | |
7ea7b4a1 | 2904 | * |
62fe710f | 2905 | * Return: true if all the received CRCs match the locally stored ones, false |
7ea7b4a1 AQ |
2906 | * otherwise |
2907 | */ | |
2908 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2909 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2910 | u16 num_vlan) |
7ea7b4a1 AQ |
2911 | { |
2912 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2913 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 2914 | int i, orig_num_vlan; |
6b5e971a | 2915 | u32 crc; |
7ea7b4a1 AQ |
2916 | |
2917 | /* check if each received CRC matches the locally stored one */ | |
2918 | for (i = 0; i < num_vlan; i++) { | |
2919 | tt_vlan_tmp = tt_vlan + i; | |
2920 | ||
2921 | /* if orig_node is a backbone node for this VLAN, don't check | |
2922 | * the CRC as we ignore all the global entries over it | |
2923 | */ | |
2924 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2925 | orig_node->orig, |
2926 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2927 | continue; |
2928 | ||
2929 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2930 | ntohs(tt_vlan_tmp->vid)); | |
2931 | if (!vlan) | |
2932 | return false; | |
2933 | ||
91c2b1a9 | 2934 | crc = vlan->tt.crc; |
21754e25 | 2935 | batadv_orig_node_vlan_put(vlan); |
91c2b1a9 AQ |
2936 | |
2937 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2938 | return false; |
2939 | } | |
2940 | ||
c169c59d SW |
2941 | /* check if any excess VLANs exist locally for the originator |
2942 | * which are not mentioned in the TVLV from the originator. | |
2943 | */ | |
2944 | rcu_read_lock(); | |
2945 | orig_num_vlan = 0; | |
2946 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
2947 | orig_num_vlan++; | |
2948 | rcu_read_unlock(); | |
2949 | ||
2950 | if (orig_num_vlan > num_vlan) | |
2951 | return false; | |
2952 | ||
7ea7b4a1 AQ |
2953 | return true; |
2954 | } | |
2955 | ||
2956 | /** | |
2957 | * batadv_tt_local_update_crc - update all the local CRCs | |
2958 | * @bat_priv: the bat priv with all the soft interface information | |
2959 | */ | |
2960 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2961 | { | |
2962 | struct batadv_softif_vlan *vlan; | |
2963 | ||
2964 | /* recompute the global CRC for each VLAN */ | |
2965 | rcu_read_lock(); | |
2966 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2967 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2968 | } | |
2969 | rcu_read_unlock(); | |
2970 | } | |
2971 | ||
2972 | /** | |
2973 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2974 | * @bat_priv: the bat priv with all the soft interface information | |
2975 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2976 | */ | |
2977 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2978 | struct batadv_orig_node *orig_node) | |
2979 | { | |
2980 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2981 | u32 crc; |
7ea7b4a1 AQ |
2982 | |
2983 | /* recompute the global CRC for each VLAN */ | |
2984 | rcu_read_lock(); | |
d0fa4f3f | 2985 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
2986 | /* if orig_node is a backbone node for this VLAN, don't compute |
2987 | * the CRC as we ignore all the global entries over it | |
2988 | */ | |
cfd4f757 AQ |
2989 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2990 | vlan->vid)) | |
7ea7b4a1 AQ |
2991 | continue; |
2992 | ||
2993 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2994 | vlan->tt.crc = crc; | |
2995 | } | |
2996 | rcu_read_unlock(); | |
a73105b8 AQ |
2997 | } |
2998 | ||
ced72933 AQ |
2999 | /** |
3000 | * batadv_send_tt_request - send a TT Request message to a given node | |
3001 | * @bat_priv: the bat priv with all the soft interface information | |
3002 | * @dst_orig_node: the destination of the message | |
3003 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
3004 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
3005 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
3006 | * @full_table: ask for the entire translation table if true, while only for the |
3007 | * last TT diff otherwise | |
d15cd622 AQ |
3008 | * |
3009 | * Return: true if the TT Request was sent, false otherwise | |
ced72933 | 3010 | */ |
4b426b10 SE |
3011 | static bool batadv_send_tt_request(struct batadv_priv *bat_priv, |
3012 | struct batadv_orig_node *dst_orig_node, | |
3013 | u8 ttvn, | |
3014 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
3015 | u16 num_vlan, bool full_table) | |
a73105b8 | 3016 | { |
335fbe0f | 3017 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 3018 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
3019 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
3020 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 3021 | bool ret = false; |
7ea7b4a1 | 3022 | int i, size; |
a73105b8 | 3023 | |
e5d89254 | 3024 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
3025 | if (!primary_if) |
3026 | goto out; | |
3027 | ||
3028 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
3029 | * reply from the same orig_node yet |
3030 | */ | |
383b8636 | 3031 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
3032 | if (!tt_req_node) |
3033 | goto out; | |
3034 | ||
7ea7b4a1 AQ |
3035 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
3036 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 3037 | if (!tvlv_tt_data) |
a73105b8 AQ |
3038 | goto out; |
3039 | ||
335fbe0f ML |
3040 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
3041 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
3042 | tvlv_tt_data->num_vlan = htons(num_vlan); |
3043 | ||
3044 | /* send all the CRCs within the request. This is needed by intermediate | |
3045 | * nodes to ensure they have the correct table before replying | |
3046 | */ | |
3047 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
3048 | for (i = 0; i < num_vlan; i++) { | |
3049 | tt_vlan_req->vid = tt_vlan->vid; | |
3050 | tt_vlan_req->crc = tt_vlan->crc; | |
3051 | ||
3052 | tt_vlan_req++; | |
3053 | tt_vlan++; | |
3054 | } | |
a73105b8 AQ |
3055 | |
3056 | if (full_table) | |
335fbe0f | 3057 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3058 | |
bb351ba0 | 3059 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 3060 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 3061 | |
d69909d2 | 3062 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
3063 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
3064 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 3065 | tvlv_tt_data, size); |
335fbe0f | 3066 | ret = true; |
a73105b8 AQ |
3067 | |
3068 | out: | |
a73105b8 | 3069 | if (primary_if) |
82047ad7 | 3070 | batadv_hardif_put(primary_if); |
9c4604a2 | 3071 | |
a73105b8 | 3072 | if (ret && tt_req_node) { |
807736f6 | 3073 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
9c4604a2 SE |
3074 | if (!hlist_unhashed(&tt_req_node->list)) { |
3075 | hlist_del_init(&tt_req_node->list); | |
3076 | batadv_tt_req_node_put(tt_req_node); | |
3077 | } | |
807736f6 | 3078 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 3079 | } |
9c4604a2 SE |
3080 | |
3081 | if (tt_req_node) | |
3082 | batadv_tt_req_node_put(tt_req_node); | |
3083 | ||
335fbe0f | 3084 | kfree(tvlv_tt_data); |
a73105b8 AQ |
3085 | return ret; |
3086 | } | |
3087 | ||
335fbe0f ML |
3088 | /** |
3089 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
3090 | * node's translation table | |
3091 | * @bat_priv: the bat priv with all the soft interface information | |
3092 | * @tt_data: tt data containing the tt request information | |
3093 | * @req_src: mac address of tt request sender | |
3094 | * @req_dst: mac address of tt request recipient | |
3095 | * | |
62fe710f | 3096 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3097 | */ |
3098 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
3099 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3100 | u8 *req_src, u8 *req_dst) |
a73105b8 | 3101 | { |
170173bf | 3102 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 3103 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 3104 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 3105 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 3106 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 3107 | bool ret = false, full_table; |
6b5e971a SE |
3108 | u8 orig_ttvn, req_ttvn; |
3109 | u16 tvlv_len; | |
3110 | s32 tt_len; | |
a73105b8 | 3111 | |
39c75a51 | 3112 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3113 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 3114 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 3115 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
3116 | |
3117 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 3118 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
3119 | if (!req_dst_orig_node) |
3120 | goto out; | |
3121 | ||
335fbe0f | 3122 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
3123 | if (!res_dst_orig_node) |
3124 | goto out; | |
3125 | ||
6b5e971a | 3126 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 3127 | req_ttvn = tt_data->ttvn; |
a73105b8 | 3128 | |
7ea7b4a1 | 3129 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 3130 | /* this node doesn't have the requested data */ |
a73105b8 | 3131 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
3132 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
3133 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
3134 | goto out; |
3135 | ||
015758d0 | 3136 | /* If the full table has been explicitly requested */ |
335fbe0f | 3137 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
3138 | !req_dst_orig_node->tt_buff) |
3139 | full_table = true; | |
3140 | else | |
3141 | full_table = false; | |
3142 | ||
335fbe0f ML |
3143 | /* TT fragmentation hasn't been implemented yet, so send as many |
3144 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 3145 | */ |
a73105b8 AQ |
3146 | if (!full_table) { |
3147 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
3148 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 3149 | |
7ea7b4a1 AQ |
3150 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
3151 | &tvlv_tt_data, | |
3152 | &tt_change, | |
3153 | &tt_len); | |
3154 | if (!tt_len) | |
a73105b8 AQ |
3155 | goto unlock; |
3156 | ||
a73105b8 | 3157 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 3158 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 3159 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
3160 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
3161 | } else { | |
7ea7b4a1 AQ |
3162 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
3163 | * in the initial part | |
3164 | */ | |
3165 | tt_len = -1; | |
3166 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
3167 | &tvlv_tt_data, | |
3168 | &tt_change, | |
3169 | &tt_len); | |
3170 | if (!tt_len) | |
a73105b8 | 3171 | goto out; |
7ea7b4a1 AQ |
3172 | |
3173 | /* fill the rest of the tvlv with the real TT entries */ | |
3174 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
3175 | tt_change, tt_len, | |
3176 | batadv_tt_global_valid, | |
3177 | req_dst_orig_node); | |
a73105b8 AQ |
3178 | } |
3179 | ||
a19d3d85 ML |
3180 | /* Don't send the response, if larger than fragmented packet. */ |
3181 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
3182 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
3183 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
3184 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
3185 | res_dst_orig_node->orig); | |
3186 | goto out; | |
3187 | } | |
3188 | ||
335fbe0f ML |
3189 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
3190 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
3191 | |
3192 | if (full_table) | |
335fbe0f | 3193 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3194 | |
39c75a51 | 3195 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
3196 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
3197 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
3198 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 3199 | |
d69909d2 | 3200 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 3201 | |
335fbe0f | 3202 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
3203 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
3204 | tvlv_len); | |
e91ecfc6 | 3205 | |
335fbe0f | 3206 | ret = true; |
a73105b8 AQ |
3207 | goto out; |
3208 | ||
3209 | unlock: | |
3210 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
3211 | ||
3212 | out: | |
3213 | if (res_dst_orig_node) | |
5d967310 | 3214 | batadv_orig_node_put(res_dst_orig_node); |
a73105b8 | 3215 | if (req_dst_orig_node) |
5d967310 | 3216 | batadv_orig_node_put(req_dst_orig_node); |
335fbe0f | 3217 | kfree(tvlv_tt_data); |
a73105b8 | 3218 | return ret; |
a73105b8 | 3219 | } |
96412690 | 3220 | |
335fbe0f ML |
3221 | /** |
3222 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
3223 | * translation table | |
3224 | * @bat_priv: the bat priv with all the soft interface information | |
3225 | * @tt_data: tt data containing the tt request information | |
3226 | * @req_src: mac address of tt request sender | |
3227 | * | |
62fe710f | 3228 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3229 | */ |
3230 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
3231 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3232 | u8 *req_src) |
a73105b8 | 3233 | { |
335fbe0f | 3234 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 3235 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
3236 | struct batadv_tvlv_tt_change *tt_change; |
3237 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
3238 | u8 my_ttvn, req_ttvn; |
3239 | u16 tvlv_len; | |
a73105b8 | 3240 | bool full_table; |
6b5e971a | 3241 | s32 tt_len; |
a73105b8 | 3242 | |
39c75a51 | 3243 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3244 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 3245 | req_src, tt_data->ttvn, |
a2f2b6cd | 3246 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3247 | |
a70a9aa9 | 3248 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 3249 | |
6b5e971a | 3250 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 3251 | req_ttvn = tt_data->ttvn; |
a73105b8 | 3252 | |
335fbe0f | 3253 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
3254 | if (!orig_node) |
3255 | goto out; | |
3256 | ||
e5d89254 | 3257 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
3258 | if (!primary_if) |
3259 | goto out; | |
3260 | ||
3261 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
3262 | * is too big send the whole local translation table |
3263 | */ | |
335fbe0f | 3264 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 3265 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
3266 | full_table = true; |
3267 | else | |
3268 | full_table = false; | |
3269 | ||
335fbe0f ML |
3270 | /* TT fragmentation hasn't been implemented yet, so send as many |
3271 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 3272 | */ |
a73105b8 | 3273 | if (!full_table) { |
807736f6 | 3274 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 3275 | |
7ea7b4a1 AQ |
3276 | tt_len = bat_priv->tt.last_changeset_len; |
3277 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
3278 | &tvlv_tt_data, | |
3279 | &tt_change, | |
3280 | &tt_len); | |
3281 | if (!tt_len) | |
a73105b8 AQ |
3282 | goto unlock; |
3283 | ||
335fbe0f | 3284 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 3285 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
3286 | bat_priv->tt.last_changeset_len); |
3287 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 3288 | } else { |
6b5e971a | 3289 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 3290 | |
7ea7b4a1 AQ |
3291 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
3292 | * in the initial part | |
3293 | */ | |
3294 | tt_len = -1; | |
3295 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
3296 | &tvlv_tt_data, | |
3297 | &tt_change, | |
3298 | &tt_len); | |
3299 | if (!tt_len) | |
a73105b8 | 3300 | goto out; |
7ea7b4a1 AQ |
3301 | |
3302 | /* fill the rest of the tvlv with the real TT entries */ | |
3303 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
3304 | tt_change, tt_len, | |
3305 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
3306 | } |
3307 | ||
335fbe0f ML |
3308 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
3309 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
3310 | |
3311 | if (full_table) | |
335fbe0f | 3312 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 3313 | |
39c75a51 | 3314 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
3315 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
3316 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 3317 | |
d69909d2 | 3318 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 3319 | |
335fbe0f | 3320 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
3321 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
3322 | tvlv_len); | |
335fbe0f | 3323 | |
a73105b8 AQ |
3324 | goto out; |
3325 | ||
3326 | unlock: | |
807736f6 | 3327 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 3328 | out: |
a70a9aa9 | 3329 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 3330 | if (orig_node) |
5d967310 | 3331 | batadv_orig_node_put(orig_node); |
a73105b8 | 3332 | if (primary_if) |
82047ad7 | 3333 | batadv_hardif_put(primary_if); |
335fbe0f ML |
3334 | kfree(tvlv_tt_data); |
3335 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
3336 | return true; |
3337 | } | |
3338 | ||
335fbe0f ML |
3339 | /** |
3340 | * batadv_send_tt_response - send reply to tt request | |
3341 | * @bat_priv: the bat priv with all the soft interface information | |
3342 | * @tt_data: tt data containing the tt request information | |
3343 | * @req_src: mac address of tt request sender | |
3344 | * @req_dst: mac address of tt request recipient | |
3345 | * | |
62fe710f | 3346 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
3347 | */ |
3348 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
3349 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3350 | u8 *req_src, u8 *req_dst) |
a73105b8 | 3351 | { |
cfd4f757 | 3352 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 3353 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
3354 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
3355 | req_dst); | |
a73105b8 AQ |
3356 | } |
3357 | ||
56303d34 SE |
3358 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
3359 | struct batadv_orig_node *orig_node, | |
335fbe0f | 3360 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3361 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
3362 | { |
3363 | int i; | |
a513088d | 3364 | int roams; |
a73105b8 AQ |
3365 | |
3366 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
3367 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
3368 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
3369 | batadv_tt_global_del(bat_priv, orig_node, |
3370 | (tt_change + i)->addr, | |
c018ad3d | 3371 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
3372 | "tt removed by changes", |
3373 | roams); | |
08c36d3e | 3374 | } else { |
08c36d3e | 3375 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 3376 | (tt_change + i)->addr, |
c018ad3d | 3377 | ntohs((tt_change + i)->vid), |
d4f44692 | 3378 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
3379 | /* In case of problem while storing a |
3380 | * global_entry, we stop the updating | |
3381 | * procedure without committing the | |
3382 | * ttvn change. This will avoid to send | |
3383 | * corrupted data on tt_request | |
3384 | */ | |
3385 | return; | |
08c36d3e | 3386 | } |
a73105b8 | 3387 | } |
ac4eebd4 | 3388 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
3389 | } |
3390 | ||
56303d34 | 3391 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 3392 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
3393 | u8 ttvn, u8 *resp_src, |
3394 | u16 num_entries) | |
a73105b8 | 3395 | { |
170173bf | 3396 | struct batadv_orig_node *orig_node; |
a73105b8 | 3397 | |
335fbe0f | 3398 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3399 | if (!orig_node) |
3400 | goto out; | |
3401 | ||
3402 | /* Purge the old table first.. */ | |
95fb130d AQ |
3403 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
3404 | "Received full table"); | |
a73105b8 | 3405 | |
7ea7b4a1 AQ |
3406 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
3407 | ttvn); | |
a73105b8 AQ |
3408 | |
3409 | spin_lock_bh(&orig_node->tt_buff_lock); | |
3410 | kfree(orig_node->tt_buff); | |
3411 | orig_node->tt_buff_len = 0; | |
3412 | orig_node->tt_buff = NULL; | |
3413 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
3414 | ||
7ea7b4a1 | 3415 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
3416 | |
3417 | out: | |
3418 | if (orig_node) | |
5d967310 | 3419 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3420 | } |
3421 | ||
56303d34 SE |
3422 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
3423 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3424 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 3425 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 3426 | { |
a513088d SE |
3427 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
3428 | tt_num_changes, ttvn); | |
a73105b8 | 3429 | |
e8cf234a AQ |
3430 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
3431 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
3432 | atomic_set(&orig_node->last_ttvn, ttvn); |
3433 | } | |
3434 | ||
c018ad3d AQ |
3435 | /** |
3436 | * batadv_is_my_client - check if a client is served by the local node | |
3437 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 3438 | * @addr: the mac address of the client to check |
c018ad3d AQ |
3439 | * @vid: VLAN identifier |
3440 | * | |
62fe710f | 3441 | * Return: true if the client is served by this node, false otherwise. |
c018ad3d | 3442 | */ |
6b5e971a | 3443 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 3444 | unsigned short vid) |
a73105b8 | 3445 | { |
170173bf | 3446 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 3447 | bool ret = false; |
a73105b8 | 3448 | |
c018ad3d | 3449 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
3450 | if (!tt_local_entry) |
3451 | goto out; | |
058d0e26 | 3452 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
3453 | * consistency purpose) |
3454 | */ | |
7c1fd91d AQ |
3455 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
3456 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 3457 | goto out; |
7683fdc1 AQ |
3458 | ret = true; |
3459 | out: | |
a73105b8 | 3460 | if (tt_local_entry) |
95c0db90 | 3461 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 3462 | return ret; |
a73105b8 AQ |
3463 | } |
3464 | ||
335fbe0f ML |
3465 | /** |
3466 | * batadv_handle_tt_response - process incoming tt reply | |
3467 | * @bat_priv: the bat priv with all the soft interface information | |
3468 | * @tt_data: tt data containing the tt request information | |
3469 | * @resp_src: mac address of tt reply sender | |
3470 | * @num_entries: number of tt change entries appended to the tt data | |
3471 | */ | |
3472 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
3473 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3474 | u8 *resp_src, u16 num_entries) |
a73105b8 | 3475 | { |
7c26a53b ML |
3476 | struct batadv_tt_req_node *node; |
3477 | struct hlist_node *safe; | |
56303d34 | 3478 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 3479 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
3480 | u8 *tvlv_ptr = (u8 *)tt_data; |
3481 | u16 change_offset; | |
a73105b8 | 3482 | |
39c75a51 | 3483 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3484 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 3485 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 3486 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3487 | |
335fbe0f | 3488 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3489 | if (!orig_node) |
3490 | goto out; | |
3491 | ||
a70a9aa9 AQ |
3492 | spin_lock_bh(&orig_node->tt_lock); |
3493 | ||
7ea7b4a1 AQ |
3494 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
3495 | change_offset *= ntohs(tt_data->num_vlan); | |
3496 | change_offset += sizeof(*tt_data); | |
3497 | tvlv_ptr += change_offset; | |
3498 | ||
3499 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 3500 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
3501 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3502 | resp_src, num_entries); | |
96412690 | 3503 | } else { |
335fbe0f ML |
3504 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3505 | tt_data->ttvn, tt_change); | |
96412690 | 3506 | } |
a73105b8 | 3507 | |
a70a9aa9 | 3508 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3509 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3510 | |
3511 | spin_unlock_bh(&orig_node->tt_lock); | |
3512 | ||
a73105b8 | 3513 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3514 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3515 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3516 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3517 | continue; |
7c26a53b | 3518 | hlist_del_init(&node->list); |
9c4604a2 | 3519 | batadv_tt_req_node_put(node); |
a73105b8 | 3520 | } |
7ea7b4a1 | 3521 | |
807736f6 | 3522 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3523 | out: |
3524 | if (orig_node) | |
5d967310 | 3525 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3526 | } |
3527 | ||
56303d34 | 3528 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3529 | { |
56303d34 | 3530 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3531 | |
807736f6 | 3532 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3533 | |
807736f6 | 3534 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e | 3535 | list_del(&node->list); |
86452f81 | 3536 | kmem_cache_free(batadv_tt_roam_cache, node); |
cc47f66e AQ |
3537 | } |
3538 | ||
807736f6 | 3539 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3540 | } |
3541 | ||
56303d34 | 3542 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3543 | { |
56303d34 | 3544 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3545 | |
807736f6 SE |
3546 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3547 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3548 | if (!batadv_has_timed_out(node->first_time, |
3549 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3550 | continue; |
3551 | ||
3552 | list_del(&node->list); | |
86452f81 | 3553 | kmem_cache_free(batadv_tt_roam_cache, node); |
cc47f66e | 3554 | } |
807736f6 | 3555 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3556 | } |
3557 | ||
62fe710f | 3558 | /** |
d15cd622 AQ |
3559 | * batadv_tt_check_roam_count - check if a client has roamed too frequently |
3560 | * @bat_priv: the bat priv with all the soft interface information | |
3561 | * @client: mac address of the roaming client | |
62fe710f SE |
3562 | * |
3563 | * This function checks whether the client already reached the | |
cc47f66e AQ |
3564 | * maximum number of possible roaming phases. In this case the ROAMING_ADV |
3565 | * will not be sent. | |
3566 | * | |
62fe710f | 3567 | * Return: true if the ROAMING_ADV can be sent, false otherwise |
9cfc7bd6 | 3568 | */ |
6b5e971a | 3569 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3570 | { |
56303d34 | 3571 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3572 | bool ret = false; |
3573 | ||
807736f6 | 3574 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3575 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3576 | * reply from the same orig_node yet |
3577 | */ | |
807736f6 | 3578 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3579 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3580 | continue; |
3581 | ||
1eda58bf | 3582 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3583 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3584 | continue; |
3585 | ||
3e34819e | 3586 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3587 | /* Sorry, you roamed too many times! */ |
3588 | goto unlock; | |
3589 | ret = true; | |
3590 | break; | |
3591 | } | |
3592 | ||
3593 | if (!ret) { | |
86452f81 SE |
3594 | tt_roam_node = kmem_cache_alloc(batadv_tt_roam_cache, |
3595 | GFP_ATOMIC); | |
cc47f66e AQ |
3596 | if (!tt_roam_node) |
3597 | goto unlock; | |
3598 | ||
3599 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3600 | atomic_set(&tt_roam_node->counter, |
3601 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3602 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3603 | |
807736f6 | 3604 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3605 | ret = true; |
3606 | } | |
3607 | ||
3608 | unlock: | |
807736f6 | 3609 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3610 | return ret; |
3611 | } | |
3612 | ||
c018ad3d AQ |
3613 | /** |
3614 | * batadv_send_roam_adv - send a roaming advertisement message | |
3615 | * @bat_priv: the bat priv with all the soft interface information | |
3616 | * @client: mac address of the roaming client | |
3617 | * @vid: VLAN identifier | |
3618 | * @orig_node: message destination | |
3619 | * | |
3620 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3621 | * client. This is done to inform the node that from now on all traffic destined | |
3622 | * for this particular roamed client has to be forwarded to the sender of the | |
3623 | * roaming message. | |
3624 | */ | |
6b5e971a | 3625 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3626 | unsigned short vid, |
56303d34 | 3627 | struct batadv_orig_node *orig_node) |
cc47f66e | 3628 | { |
56303d34 | 3629 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3630 | struct batadv_tvlv_roam_adv tvlv_roam; |
3631 | ||
3632 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3633 | if (!primary_if) | |
3634 | goto out; | |
cc47f66e AQ |
3635 | |
3636 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3637 | * already roamed to us too many times |
3638 | */ | |
a513088d | 3639 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3640 | goto out; |
3641 | ||
39c75a51 | 3642 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3643 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3644 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3645 | |
d69909d2 | 3646 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3647 | |
122edaa0 | 3648 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3649 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3650 | |
3651 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3652 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3653 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3654 | |
3655 | out: | |
122edaa0 | 3656 | if (primary_if) |
82047ad7 | 3657 | batadv_hardif_put(primary_if); |
a73105b8 AQ |
3658 | } |
3659 | ||
a513088d | 3660 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3661 | { |
56303d34 | 3662 | struct delayed_work *delayed_work; |
807736f6 | 3663 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3664 | struct batadv_priv *bat_priv; |
3665 | ||
4ba4bc0f | 3666 | delayed_work = to_delayed_work(work); |
807736f6 SE |
3667 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3668 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3669 | |
a19d3d85 | 3670 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3671 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3672 | batadv_tt_req_purge(bat_priv); |
3673 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3674 | |
72414442 AQ |
3675 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3676 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3677 | } |
cc47f66e | 3678 | |
56303d34 | 3679 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3680 | { |
e1bf0c14 ML |
3681 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3682 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3683 | ||
807736f6 | 3684 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3685 | |
a513088d SE |
3686 | batadv_tt_local_table_free(bat_priv); |
3687 | batadv_tt_global_table_free(bat_priv); | |
3688 | batadv_tt_req_list_free(bat_priv); | |
3689 | batadv_tt_changes_list_free(bat_priv); | |
3690 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3691 | |
807736f6 | 3692 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3693 | } |
058d0e26 | 3694 | |
7ea7b4a1 AQ |
3695 | /** |
3696 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3697 | * table and possibly count them in the TT size | |
3698 | * @bat_priv: the bat priv with all the soft interface information | |
3699 | * @flags: the flag to switch | |
3700 | * @enable: whether to set or unset the flag | |
3701 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3702 | */ |
6b5e971a SE |
3703 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3704 | bool enable, bool count) | |
058d0e26 | 3705 | { |
7ea7b4a1 AQ |
3706 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3707 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 3708 | u16 changed_num = 0; |
058d0e26 | 3709 | struct hlist_head *head; |
6b5e971a | 3710 | u32 i; |
058d0e26 AQ |
3711 | |
3712 | if (!hash) | |
7ea7b4a1 | 3713 | return; |
058d0e26 AQ |
3714 | |
3715 | for (i = 0; i < hash->size; i++) { | |
3716 | head = &hash->table[i]; | |
3717 | ||
3718 | rcu_read_lock(); | |
b67bfe0d | 3719 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3720 | head, hash_entry) { |
697f2531 AQ |
3721 | if (enable) { |
3722 | if ((tt_common_entry->flags & flags) == flags) | |
3723 | continue; | |
3724 | tt_common_entry->flags |= flags; | |
3725 | } else { | |
3726 | if (!(tt_common_entry->flags & flags)) | |
3727 | continue; | |
3728 | tt_common_entry->flags &= ~flags; | |
3729 | } | |
3730 | changed_num++; | |
7ea7b4a1 AQ |
3731 | |
3732 | if (!count) | |
3733 | continue; | |
3734 | ||
3735 | batadv_tt_local_size_inc(bat_priv, | |
3736 | tt_common_entry->vid); | |
058d0e26 AQ |
3737 | } |
3738 | rcu_read_unlock(); | |
3739 | } | |
058d0e26 AQ |
3740 | } |
3741 | ||
acd34afa | 3742 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3743 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3744 | { |
807736f6 | 3745 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3746 | struct batadv_tt_common_entry *tt_common; |
3747 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3748 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3749 | struct hlist_head *head; |
3750 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3751 | u32 i; |
058d0e26 AQ |
3752 | |
3753 | if (!hash) | |
3754 | return; | |
3755 | ||
3756 | for (i = 0; i < hash->size; i++) { | |
3757 | head = &hash->table[i]; | |
3758 | list_lock = &hash->list_locks[i]; | |
3759 | ||
3760 | spin_lock_bh(list_lock); | |
b67bfe0d | 3761 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3762 | hash_entry) { |
3763 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3764 | continue; |
3765 | ||
39c75a51 | 3766 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3767 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3768 | tt_common->addr, | |
3769 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3770 | |
7ea7b4a1 | 3771 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3772 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3773 | tt_local = container_of(tt_common, |
3774 | struct batadv_tt_local_entry, | |
3775 | common); | |
35df3b29 | 3776 | |
95c0db90 | 3777 | batadv_tt_local_entry_put(tt_local); |
058d0e26 AQ |
3778 | } |
3779 | spin_unlock_bh(list_lock); | |
3780 | } | |
058d0e26 AQ |
3781 | } |
3782 | ||
e1bf0c14 | 3783 | /** |
a19d3d85 ML |
3784 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3785 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3786 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3787 | * |
3788 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3789 | */ |
a19d3d85 | 3790 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3791 | { |
5274cd68 SE |
3792 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3793 | ||
c5caf4ef LL |
3794 | /* Update multicast addresses in local translation table */ |
3795 | batadv_mcast_mla_update(bat_priv); | |
3796 | ||
e1bf0c14 ML |
3797 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3798 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3799 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3800 | return; |
e1bf0c14 | 3801 | } |
be9aa4c1 | 3802 | |
7ea7b4a1 | 3803 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3804 | |
a513088d | 3805 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3806 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3807 | |
3808 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3809 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3810 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3811 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3812 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3813 | |
3814 | /* reset the sending counter */ | |
807736f6 | 3815 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3816 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3817 | } |
a70a9aa9 | 3818 | |
a19d3d85 ML |
3819 | /** |
3820 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3821 | * have been queued in the time since the last commit | |
3822 | * @bat_priv: the bat priv with all the soft interface information | |
3823 | */ | |
3824 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3825 | { | |
3826 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3827 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3828 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3829 | } |
59b699cd | 3830 | |
6b5e971a SE |
3831 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3832 | unsigned short vid) | |
59b699cd | 3833 | { |
56303d34 SE |
3834 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3835 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3836 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3837 | bool ret = false; |
59b699cd | 3838 | |
b8cbd81d | 3839 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3840 | if (!vlan) |
3841 | return false; | |
3842 | ||
3843 | if (!atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3844 | goto out; |
59b699cd | 3845 | |
b8cbd81d | 3846 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3847 | if (!tt_local_entry) |
3848 | goto out; | |
3849 | ||
b8cbd81d | 3850 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3851 | if (!tt_global_entry) |
3852 | goto out; | |
3853 | ||
1f129fef | 3854 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3855 | goto out; |
3856 | ||
5870adc6 | 3857 | ret = true; |
59b699cd AQ |
3858 | |
3859 | out: | |
9c3bf081 | 3860 | batadv_softif_vlan_put(vlan); |
59b699cd | 3861 | if (tt_global_entry) |
5dafd8a6 | 3862 | batadv_tt_global_entry_put(tt_global_entry); |
59b699cd | 3863 | if (tt_local_entry) |
95c0db90 | 3864 | batadv_tt_local_entry_put(tt_local_entry); |
59b699cd AQ |
3865 | return ret; |
3866 | } | |
a943cac1 | 3867 | |
e1bf0c14 ML |
3868 | /** |
3869 | * batadv_tt_update_orig - update global translation table with new tt | |
3870 | * information received via ogms | |
3871 | * @bat_priv: the bat priv with all the soft interface information | |
e51f0397 SE |
3872 | * @orig_node: the orig_node of the ogm |
3873 | * @tt_buff: pointer to the first tvlv VLAN entry | |
7ea7b4a1 AQ |
3874 | * @tt_num_vlan: number of tvlv VLAN entries |
3875 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3876 | * @tt_num_changes: number of tt changes inside the tt buffer |
3877 | * @ttvn: translation table version number of this changeset | |
e1bf0c14 ML |
3878 | */ |
3879 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3880 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3881 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3882 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3883 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3884 | { |
6b5e971a | 3885 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3886 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3887 | bool full_table = true; |
e17931d1 | 3888 | bool has_tt_init; |
a943cac1 | 3889 | |
7ea7b4a1 | 3890 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3891 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3892 | &orig_node->capa_initialized); | |
e17931d1 | 3893 | |
17071578 | 3894 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3895 | * increased by one -> we can apply the attached changes |
3896 | */ | |
e17931d1 | 3897 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3898 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3899 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3900 | * times. | |
9cfc7bd6 SE |
3901 | * In this case send a tt request |
3902 | */ | |
a943cac1 ML |
3903 | if (!tt_num_changes) { |
3904 | full_table = false; | |
3905 | goto request_table; | |
3906 | } | |
3907 | ||
a70a9aa9 AQ |
3908 | spin_lock_bh(&orig_node->tt_lock); |
3909 | ||
a513088d | 3910 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3911 | ttvn, tt_change); |
a943cac1 ML |
3912 | |
3913 | /* Even if we received the precomputed crc with the OGM, we | |
3914 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3915 | * in the global table |
3916 | */ | |
7ea7b4a1 | 3917 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3918 | |
a70a9aa9 AQ |
3919 | spin_unlock_bh(&orig_node->tt_lock); |
3920 | ||
a943cac1 ML |
3921 | /* The ttvn alone is not enough to guarantee consistency |
3922 | * because a single value could represent different states | |
3923 | * (due to the wrap around). Thus a node has to check whether | |
3924 | * the resulting table (after applying the changes) is still | |
3925 | * consistent or not. E.g. a node could disconnect while its | |
3926 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3927 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3928 | * inconsistency |
3929 | */ | |
7ea7b4a1 AQ |
3930 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3931 | tt_num_vlan)) | |
a943cac1 | 3932 | goto request_table; |
a943cac1 ML |
3933 | } else { |
3934 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3935 | * in sync anymore -> request fresh tt data |
3936 | */ | |
e17931d1 | 3937 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3938 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3939 | tt_num_vlan)) { | |
a943cac1 | 3940 | request_table: |
39c75a51 | 3941 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3942 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3943 | orig_node->orig, ttvn, orig_ttvn, | |
3944 | tt_num_changes); | |
a513088d | 3945 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3946 | tt_vlan, tt_num_vlan, |
3947 | full_table); | |
a943cac1 ML |
3948 | return; |
3949 | } | |
3950 | } | |
3951 | } | |
3275e7cc | 3952 | |
c018ad3d AQ |
3953 | /** |
3954 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3955 | * @bat_priv: the bat priv with all the soft interface information | |
3956 | * @addr: the mac address of the client to check | |
3957 | * @vid: VLAN identifier | |
3958 | * | |
62fe710f | 3959 | * Return: true if we know that the client has moved from its old originator |
c018ad3d AQ |
3960 | * to another one. This entry is still kept for consistency purposes and will be |
3961 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3962 | */ |
56303d34 | 3963 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 3964 | u8 *addr, unsigned short vid) |
3275e7cc | 3965 | { |
56303d34 | 3966 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3967 | bool ret = false; |
3968 | ||
c018ad3d | 3969 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3970 | if (!tt_global_entry) |
3971 | goto out; | |
3972 | ||
c1d07431 | 3973 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
5dafd8a6 | 3974 | batadv_tt_global_entry_put(tt_global_entry); |
3275e7cc AQ |
3975 | out: |
3976 | return ret; | |
3977 | } | |
30cfd02b | 3978 | |
7c1fd91d AQ |
3979 | /** |
3980 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3981 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3982 | * @addr: the mac address of the local client to query |
3983 | * @vid: VLAN identifier | |
7c1fd91d | 3984 | * |
62fe710f | 3985 | * Return: true if the local client is known to be roaming (it is not served by |
7c1fd91d AQ |
3986 | * this node anymore) or not. If yes, the client is still present in the table |
3987 | * to keep the latter consistent with the node TTVN | |
3988 | */ | |
3989 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 3990 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
3991 | { |
3992 | struct batadv_tt_local_entry *tt_local_entry; | |
3993 | bool ret = false; | |
3994 | ||
c018ad3d | 3995 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3996 | if (!tt_local_entry) |
3997 | goto out; | |
3998 | ||
3999 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
95c0db90 | 4000 | batadv_tt_local_entry_put(tt_local_entry); |
7c1fd91d AQ |
4001 | out: |
4002 | return ret; | |
7c1fd91d AQ |
4003 | } |
4004 | ||
30cfd02b AQ |
4005 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
4006 | struct batadv_orig_node *orig_node, | |
c018ad3d | 4007 | const unsigned char *addr, |
16052789 | 4008 | unsigned short vid) |
30cfd02b AQ |
4009 | { |
4010 | bool ret = false; | |
4011 | ||
16052789 | 4012 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
4013 | BATADV_TT_CLIENT_TEMP, |
4014 | atomic_read(&orig_node->last_ttvn))) | |
4015 | goto out; | |
4016 | ||
4017 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
4018 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
4019 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
4020 | ret = true; |
4021 | out: | |
4022 | return ret; | |
4023 | } | |
e1bf0c14 | 4024 | |
a19d3d85 ML |
4025 | /** |
4026 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
4027 | * maximum packet size that can be transported through the mesh | |
4028 | * @soft_iface: netdev struct of the mesh interface | |
4029 | * | |
4030 | * Remove entries older than 'timeout' and half timeout if more entries need | |
4031 | * to be removed. | |
4032 | */ | |
4033 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
4034 | { | |
4035 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
4036 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
4037 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
4038 | bool reduced = false; | |
4039 | ||
4040 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
4041 | ||
4042 | while (true) { | |
4043 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
4044 | if (packet_size_max >= table_size) | |
4045 | break; | |
4046 | ||
4047 | batadv_tt_local_purge(bat_priv, timeout); | |
4048 | batadv_tt_local_purge_pending_clients(bat_priv); | |
4049 | ||
4050 | timeout /= 2; | |
4051 | reduced = true; | |
4052 | net_ratelimited_function(batadv_info, soft_iface, | |
4053 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
4054 | packet_size_max); | |
4055 | } | |
4056 | ||
4057 | /* commit these changes immediately, to avoid synchronization problem | |
4058 | * with the TTVN | |
4059 | */ | |
4060 | if (reduced) | |
4061 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
4062 | ||
4063 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
4064 | } | |
4065 | ||
e1bf0c14 ML |
4066 | /** |
4067 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
4068 | * @bat_priv: the bat priv with all the soft interface information | |
4069 | * @orig: the orig_node of the ogm | |
4070 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
4071 | * @tvlv_value: tvlv buffer containing the gateway data | |
4072 | * @tvlv_value_len: tvlv buffer length | |
4073 | */ | |
4074 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
4075 | struct batadv_orig_node *orig, | |
6b5e971a SE |
4076 | u8 flags, void *tvlv_value, |
4077 | u16 tvlv_value_len) | |
e1bf0c14 | 4078 | { |
7ea7b4a1 AQ |
4079 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
4080 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 4081 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 4082 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
4083 | |
4084 | if (tvlv_value_len < sizeof(*tt_data)) | |
4085 | return; | |
4086 | ||
4087 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
4088 | tvlv_value_len -= sizeof(*tt_data); | |
4089 | ||
7ea7b4a1 AQ |
4090 | num_vlan = ntohs(tt_data->num_vlan); |
4091 | ||
4092 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
4093 | return; | |
4094 | ||
4095 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
4096 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
4097 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
4098 | ||
298e6e68 | 4099 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 4100 | |
7ea7b4a1 AQ |
4101 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
4102 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
4103 | } |
4104 | ||
335fbe0f ML |
4105 | /** |
4106 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
4107 | * container | |
4108 | * @bat_priv: the bat priv with all the soft interface information | |
4109 | * @src: mac address of tt tvlv sender | |
4110 | * @dst: mac address of tt tvlv recipient | |
4111 | * @tvlv_value: tvlv buffer containing the tt data | |
4112 | * @tvlv_value_len: tvlv buffer length | |
4113 | * | |
62fe710f | 4114 | * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS |
335fbe0f ML |
4115 | * otherwise. |
4116 | */ | |
4117 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 4118 | u8 *src, u8 *dst, |
335fbe0f | 4119 | void *tvlv_value, |
6b5e971a | 4120 | u16 tvlv_value_len) |
335fbe0f ML |
4121 | { |
4122 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 4123 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
4124 | char tt_flag; |
4125 | bool ret; | |
4126 | ||
4127 | if (tvlv_value_len < sizeof(*tt_data)) | |
4128 | return NET_RX_SUCCESS; | |
4129 | ||
4130 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
4131 | tvlv_value_len -= sizeof(*tt_data); | |
4132 | ||
7ea7b4a1 AQ |
4133 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
4134 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
4135 | ||
4136 | if (tvlv_value_len < tt_vlan_len) | |
4137 | return NET_RX_SUCCESS; | |
4138 | ||
4139 | tvlv_value_len -= tt_vlan_len; | |
4140 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
4141 | |
4142 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
4143 | case BATADV_TT_REQUEST: | |
4144 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
4145 | ||
4146 | /* If this node cannot provide a TT response the tt_request is | |
4147 | * forwarded | |
4148 | */ | |
4149 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
4150 | if (!ret) { | |
4151 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
4152 | tt_flag = 'F'; | |
4153 | else | |
4154 | tt_flag = '.'; | |
4155 | ||
4156 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4157 | "Routing TT_REQUEST to %pM [%c]\n", | |
4158 | dst, tt_flag); | |
4159 | /* tvlv API will re-route the packet */ | |
4160 | return NET_RX_DROP; | |
4161 | } | |
4162 | break; | |
4163 | case BATADV_TT_RESPONSE: | |
4164 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
4165 | ||
4166 | if (batadv_is_my_mac(bat_priv, dst)) { | |
4167 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 4168 | src, tt_num_entries); |
335fbe0f ML |
4169 | return NET_RX_SUCCESS; |
4170 | } | |
4171 | ||
4172 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
4173 | tt_flag = 'F'; | |
4174 | else | |
4175 | tt_flag = '.'; | |
4176 | ||
4177 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4178 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
4179 | ||
4180 | /* tvlv API will re-route the packet */ | |
4181 | return NET_RX_DROP; | |
4182 | } | |
4183 | ||
4184 | return NET_RX_SUCCESS; | |
4185 | } | |
4186 | ||
122edaa0 ML |
4187 | /** |
4188 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
4189 | * @bat_priv: the bat priv with all the soft interface information | |
4190 | * @src: mac address of tt tvlv sender | |
4191 | * @dst: mac address of tt tvlv recipient | |
4192 | * @tvlv_value: tvlv buffer containing the tt data | |
4193 | * @tvlv_value_len: tvlv buffer length | |
4194 | * | |
62fe710f | 4195 | * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS |
122edaa0 ML |
4196 | * otherwise. |
4197 | */ | |
4198 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 4199 | u8 *src, u8 *dst, |
122edaa0 | 4200 | void *tvlv_value, |
6b5e971a | 4201 | u16 tvlv_value_len) |
122edaa0 ML |
4202 | { |
4203 | struct batadv_tvlv_roam_adv *roaming_adv; | |
4204 | struct batadv_orig_node *orig_node = NULL; | |
4205 | ||
4206 | /* If this node is not the intended recipient of the | |
4207 | * roaming advertisement the packet is forwarded | |
4208 | * (the tvlv API will re-route the packet). | |
4209 | */ | |
4210 | if (!batadv_is_my_mac(bat_priv, dst)) | |
4211 | return NET_RX_DROP; | |
4212 | ||
122edaa0 ML |
4213 | if (tvlv_value_len < sizeof(*roaming_adv)) |
4214 | goto out; | |
4215 | ||
4216 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
4217 | if (!orig_node) | |
4218 | goto out; | |
4219 | ||
4220 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
4221 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
4222 | ||
4223 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
4224 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
4225 | src, roaming_adv->client); | |
4226 | ||
4227 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 4228 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
4229 | atomic_read(&orig_node->last_ttvn) + 1); |
4230 | ||
4231 | out: | |
4232 | if (orig_node) | |
5d967310 | 4233 | batadv_orig_node_put(orig_node); |
122edaa0 ML |
4234 | return NET_RX_SUCCESS; |
4235 | } | |
4236 | ||
e1bf0c14 ML |
4237 | /** |
4238 | * batadv_tt_init - initialise the translation table internals | |
4239 | * @bat_priv: the bat priv with all the soft interface information | |
4240 | * | |
62fe710f | 4241 | * Return: 0 on success or negative error number in case of failure. |
e1bf0c14 ML |
4242 | */ |
4243 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
4244 | { | |
4245 | int ret; | |
4246 | ||
0eb01568 AQ |
4247 | /* synchronized flags must be remote */ |
4248 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
4249 | ||
e1bf0c14 ML |
4250 | ret = batadv_tt_local_init(bat_priv); |
4251 | if (ret < 0) | |
4252 | return ret; | |
4253 | ||
4254 | ret = batadv_tt_global_init(bat_priv); | |
4255 | if (ret < 0) | |
4256 | return ret; | |
4257 | ||
4258 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
4259 | batadv_tt_tvlv_unicast_handler_v1, |
4260 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 4261 | |
122edaa0 ML |
4262 | batadv_tvlv_handler_register(bat_priv, NULL, |
4263 | batadv_roam_tvlv_unicast_handler_v1, | |
4264 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
4265 | ||
e1bf0c14 ML |
4266 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
4267 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
4268 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
4269 | ||
4270 | return 1; | |
4271 | } | |
42cb0bef AQ |
4272 | |
4273 | /** | |
4274 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
4275 | * @bat_priv: the bat priv with all the soft interface information | |
4276 | * @addr: the mac address of the client | |
4277 | * @vid: the identifier of the VLAN where this client is connected | |
4278 | * | |
62fe710f | 4279 | * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false |
42cb0bef AQ |
4280 | * otherwise |
4281 | */ | |
4282 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 4283 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
4284 | { |
4285 | struct batadv_tt_global_entry *tt; | |
4286 | bool ret; | |
4287 | ||
4288 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
4289 | if (!tt) | |
4290 | return false; | |
4291 | ||
4292 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
4293 | ||
5dafd8a6 | 4294 | batadv_tt_global_entry_put(tt); |
42cb0bef AQ |
4295 | |
4296 | return ret; | |
4297 | } | |
86452f81 SE |
4298 | |
4299 | /** | |
4300 | * batadv_tt_cache_init - Initialize tt memory object cache | |
4301 | * | |
4302 | * Return: 0 on success or negative error number in case of failure. | |
4303 | */ | |
4304 | int __init batadv_tt_cache_init(void) | |
4305 | { | |
4306 | size_t tl_size = sizeof(struct batadv_tt_local_entry); | |
4307 | size_t tg_size = sizeof(struct batadv_tt_global_entry); | |
4308 | size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry); | |
4309 | size_t tt_change_size = sizeof(struct batadv_tt_change_node); | |
4310 | size_t tt_req_size = sizeof(struct batadv_tt_req_node); | |
4311 | size_t tt_roam_size = sizeof(struct batadv_tt_roam_node); | |
4312 | ||
4313 | batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0, | |
4314 | SLAB_HWCACHE_ALIGN, NULL); | |
4315 | if (!batadv_tl_cache) | |
4316 | return -ENOMEM; | |
4317 | ||
4318 | batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0, | |
4319 | SLAB_HWCACHE_ALIGN, NULL); | |
4320 | if (!batadv_tg_cache) | |
4321 | goto err_tt_tl_destroy; | |
4322 | ||
4323 | batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache", | |
4324 | tt_orig_size, 0, | |
4325 | SLAB_HWCACHE_ALIGN, NULL); | |
4326 | if (!batadv_tt_orig_cache) | |
4327 | goto err_tt_tg_destroy; | |
4328 | ||
4329 | batadv_tt_change_cache = kmem_cache_create("batadv_tt_change_cache", | |
4330 | tt_change_size, 0, | |
4331 | SLAB_HWCACHE_ALIGN, NULL); | |
4332 | if (!batadv_tt_change_cache) | |
4333 | goto err_tt_orig_destroy; | |
4334 | ||
4335 | batadv_tt_req_cache = kmem_cache_create("batadv_tt_req_cache", | |
4336 | tt_req_size, 0, | |
4337 | SLAB_HWCACHE_ALIGN, NULL); | |
4338 | if (!batadv_tt_req_cache) | |
4339 | goto err_tt_change_destroy; | |
4340 | ||
4341 | batadv_tt_roam_cache = kmem_cache_create("batadv_tt_roam_cache", | |
4342 | tt_roam_size, 0, | |
4343 | SLAB_HWCACHE_ALIGN, NULL); | |
4344 | if (!batadv_tt_roam_cache) | |
4345 | goto err_tt_req_destroy; | |
4346 | ||
4347 | return 0; | |
4348 | ||
4349 | err_tt_req_destroy: | |
4350 | kmem_cache_destroy(batadv_tt_req_cache); | |
4351 | batadv_tt_req_cache = NULL; | |
4352 | err_tt_change_destroy: | |
4353 | kmem_cache_destroy(batadv_tt_change_cache); | |
4354 | batadv_tt_change_cache = NULL; | |
4355 | err_tt_orig_destroy: | |
4356 | kmem_cache_destroy(batadv_tt_orig_cache); | |
4357 | batadv_tt_orig_cache = NULL; | |
4358 | err_tt_tg_destroy: | |
4359 | kmem_cache_destroy(batadv_tg_cache); | |
4360 | batadv_tg_cache = NULL; | |
4361 | err_tt_tl_destroy: | |
4362 | kmem_cache_destroy(batadv_tl_cache); | |
4363 | batadv_tl_cache = NULL; | |
4364 | ||
4365 | return -ENOMEM; | |
4366 | } | |
4367 | ||
4368 | /** | |
4369 | * batadv_tt_cache_destroy - Destroy tt memory object cache | |
4370 | */ | |
4371 | void batadv_tt_cache_destroy(void) | |
4372 | { | |
4373 | kmem_cache_destroy(batadv_tl_cache); | |
4374 | kmem_cache_destroy(batadv_tg_cache); | |
4375 | kmem_cache_destroy(batadv_tt_orig_cache); | |
4376 | kmem_cache_destroy(batadv_tt_change_cache); | |
4377 | kmem_cache_destroy(batadv_tt_req_cache); | |
4378 | kmem_cache_destroy(batadv_tt_roam_cache); | |
4379 | } |