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