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0046b040 | 1 | /* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
c6c8fea2 | 18 | #include "translation-table.h" |
1e2c2a4f SE |
19 | #include "main.h" |
20 | ||
21 | #include <linux/atomic.h> | |
ac4eebd4 | 22 | #include <linux/bitops.h> |
1e2c2a4f SE |
23 | #include <linux/bug.h> |
24 | #include <linux/byteorder/generic.h> | |
25 | #include <linux/compiler.h> | |
26 | #include <linux/crc32c.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/jhash.h> | |
32 | #include <linux/jiffies.h> | |
33 | #include <linux/kernel.h> | |
6e8ef69d | 34 | #include <linux/kref.h> |
1e2c2a4f SE |
35 | #include <linux/list.h> |
36 | #include <linux/lockdep.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/rculist.h> | |
39 | #include <linux/rcupdate.h> | |
40 | #include <linux/seq_file.h> | |
41 | #include <linux/slab.h> | |
42 | #include <linux/spinlock.h> | |
43 | #include <linux/stddef.h> | |
44 | #include <linux/string.h> | |
45 | #include <linux/workqueue.h> | |
46 | #include <net/net_namespace.h> | |
47 | ||
48 | #include "bridge_loop_avoidance.h" | |
32ae9b22 | 49 | #include "hard-interface.h" |
c6c8fea2 | 50 | #include "hash.h" |
c5caf4ef | 51 | #include "multicast.h" |
1e2c2a4f SE |
52 | #include "originator.h" |
53 | #include "packet.h" | |
54 | #include "soft-interface.h" | |
a73105b8 | 55 | |
dec05074 AQ |
56 | /* hash class keys */ |
57 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
58 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
59 | ||
6b5e971a | 60 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 61 | unsigned short vid, |
56303d34 | 62 | struct batadv_orig_node *orig_node); |
a513088d SE |
63 | static void batadv_tt_purge(struct work_struct *work); |
64 | static void | |
56303d34 | 65 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
66 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
67 | struct batadv_orig_node *orig_node, | |
68 | const unsigned char *addr, | |
c018ad3d AQ |
69 | unsigned short vid, const char *message, |
70 | bool roaming); | |
c6c8fea2 | 71 | |
62fe710f | 72 | /** |
d15cd622 AQ |
73 | * batadv_compare_tt - check if two TT entries are the same |
74 | * @node: the list element pointer of the first TT entry | |
75 | * @data2: pointer to the tt_common_entry of the second TT entry | |
62fe710f | 76 | * |
d15cd622 AQ |
77 | * Compare the MAC address and the VLAN ID of the two TT entries and check if |
78 | * they are the same TT client. | |
79 | * Return: 1 if the two TT clients are the same, 0 otherwise | |
62fe710f | 80 | */ |
a513088d | 81 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 82 | { |
56303d34 | 83 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 84 | hash_entry); |
4c718958 ML |
85 | const struct batadv_tt_common_entry *tt1 = data1; |
86 | const struct batadv_tt_common_entry *tt2 = data2; | |
7aadf889 | 87 | |
4c718958 | 88 | return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2); |
7aadf889 ML |
89 | } |
90 | ||
c018ad3d AQ |
91 | /** |
92 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
93 | * @data: pointer to the tt_common_entry object to map | |
94 | * @size: the size of the hash table | |
95 | * | |
62fe710f | 96 | * Return: the hash index where the object represented by 'data' should be |
c018ad3d AQ |
97 | * stored at. |
98 | */ | |
6b5e971a | 99 | static inline u32 batadv_choose_tt(const void *data, u32 size) |
c018ad3d AQ |
100 | { |
101 | struct batadv_tt_common_entry *tt; | |
6b5e971a | 102 | u32 hash = 0; |
c018ad3d AQ |
103 | |
104 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
105 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
106 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
107 | |
108 | return hash % size; | |
109 | } | |
110 | ||
111 | /** | |
112 | * batadv_tt_hash_find - look for a client in the given hash table | |
113 | * @hash: the hash table to search | |
114 | * @addr: the mac address of the client to look for | |
115 | * @vid: VLAN identifier | |
116 | * | |
62fe710f | 117 | * Return: a pointer to the tt_common struct belonging to the searched client if |
c018ad3d AQ |
118 | * found, NULL otherwise. |
119 | */ | |
56303d34 | 120 | static struct batadv_tt_common_entry * |
6b5e971a | 121 | batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr, |
c018ad3d | 122 | unsigned short vid) |
7aadf889 | 123 | { |
7aadf889 | 124 | struct hlist_head *head; |
c018ad3d | 125 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
6b5e971a | 126 | u32 index; |
7aadf889 ML |
127 | |
128 | if (!hash) | |
129 | return NULL; | |
130 | ||
8fdd0153 | 131 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
132 | to_search.vid = vid; |
133 | ||
134 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
135 | head = &hash->table[index]; |
136 | ||
137 | rcu_read_lock(); | |
c018ad3d AQ |
138 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
139 | if (!batadv_compare_eth(tt, addr)) | |
140 | continue; | |
141 | ||
142 | if (tt->vid != vid) | |
7aadf889 ML |
143 | continue; |
144 | ||
92dcdf09 | 145 | if (!kref_get_unless_zero(&tt->refcount)) |
7683fdc1 AQ |
146 | continue; |
147 | ||
c018ad3d | 148 | tt_tmp = tt; |
7aadf889 ML |
149 | break; |
150 | } | |
151 | rcu_read_unlock(); | |
152 | ||
c018ad3d | 153 | return tt_tmp; |
7aadf889 ML |
154 | } |
155 | ||
c018ad3d AQ |
156 | /** |
157 | * batadv_tt_local_hash_find - search the local table for a given client | |
158 | * @bat_priv: the bat priv with all the soft interface information | |
159 | * @addr: the mac address of the client to look for | |
160 | * @vid: VLAN identifier | |
161 | * | |
62fe710f | 162 | * Return: a pointer to the corresponding tt_local_entry struct if the client is |
c018ad3d AQ |
163 | * found, NULL otherwise. |
164 | */ | |
56303d34 | 165 | static struct batadv_tt_local_entry * |
6b5e971a | 166 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 167 | unsigned short vid) |
7aadf889 | 168 | { |
56303d34 SE |
169 | struct batadv_tt_common_entry *tt_common_entry; |
170 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 171 | |
c018ad3d AQ |
172 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
173 | vid); | |
48100bac AQ |
174 | if (tt_common_entry) |
175 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
176 | struct batadv_tt_local_entry, |
177 | common); | |
48100bac AQ |
178 | return tt_local_entry; |
179 | } | |
7aadf889 | 180 | |
c018ad3d AQ |
181 | /** |
182 | * batadv_tt_global_hash_find - search the global table for a given client | |
183 | * @bat_priv: the bat priv with all the soft interface information | |
184 | * @addr: the mac address of the client to look for | |
185 | * @vid: VLAN identifier | |
186 | * | |
62fe710f | 187 | * Return: a pointer to the corresponding tt_global_entry struct if the client |
c018ad3d AQ |
188 | * is found, NULL otherwise. |
189 | */ | |
56303d34 | 190 | static struct batadv_tt_global_entry * |
6b5e971a | 191 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 192 | unsigned short vid) |
48100bac | 193 | { |
56303d34 SE |
194 | struct batadv_tt_common_entry *tt_common_entry; |
195 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 196 | |
c018ad3d AQ |
197 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
198 | vid); | |
48100bac AQ |
199 | if (tt_common_entry) |
200 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
201 | struct batadv_tt_global_entry, |
202 | common); | |
48100bac | 203 | return tt_global_entry; |
7aadf889 ML |
204 | } |
205 | ||
92dcdf09 SE |
206 | /** |
207 | * batadv_tt_local_entry_release - release tt_local_entry from lists and queue | |
208 | * for free after rcu grace period | |
209 | * @ref: kref pointer of the nc_node | |
210 | */ | |
211 | static void batadv_tt_local_entry_release(struct kref *ref) | |
212 | { | |
213 | struct batadv_tt_local_entry *tt_local_entry; | |
214 | ||
215 | tt_local_entry = container_of(ref, struct batadv_tt_local_entry, | |
216 | common.refcount); | |
217 | ||
a33d970d SE |
218 | batadv_softif_vlan_put(tt_local_entry->vlan); |
219 | ||
92dcdf09 SE |
220 | kfree_rcu(tt_local_entry, common.rcu); |
221 | } | |
222 | ||
223 | /** | |
95c0db90 | 224 | * batadv_tt_local_entry_put - decrement the tt_local_entry refcounter and |
92dcdf09 SE |
225 | * possibly release it |
226 | * @tt_local_entry: tt_local_entry to be free'd | |
227 | */ | |
a513088d | 228 | static void |
95c0db90 | 229 | batadv_tt_local_entry_put(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 230 | { |
92dcdf09 SE |
231 | kref_put(&tt_local_entry->common.refcount, |
232 | batadv_tt_local_entry_release); | |
7683fdc1 AQ |
233 | } |
234 | ||
21026059 | 235 | /** |
92dcdf09 SE |
236 | * batadv_tt_global_entry_release - release tt_global_entry from lists and queue |
237 | * for free after rcu grace period | |
238 | * @ref: kref pointer of the nc_node | |
239 | */ | |
240 | static void batadv_tt_global_entry_release(struct kref *ref) | |
241 | { | |
242 | struct batadv_tt_global_entry *tt_global_entry; | |
243 | ||
244 | tt_global_entry = container_of(ref, struct batadv_tt_global_entry, | |
245 | common.refcount); | |
246 | ||
247 | batadv_tt_global_del_orig_list(tt_global_entry); | |
248 | kfree_rcu(tt_global_entry, common.rcu); | |
249 | } | |
250 | ||
251 | /** | |
5dafd8a6 SE |
252 | * batadv_tt_global_entry_put - decrement the tt_global_entry refcounter and |
253 | * possibly release it | |
92dcdf09 | 254 | * @tt_global_entry: tt_global_entry to be free'd |
21026059 | 255 | */ |
a513088d | 256 | static void |
5dafd8a6 | 257 | batadv_tt_global_entry_put(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 258 | { |
92dcdf09 SE |
259 | kref_put(&tt_global_entry->common.refcount, |
260 | batadv_tt_global_entry_release); | |
db08e6e5 SW |
261 | } |
262 | ||
1d8ab8d3 LL |
263 | /** |
264 | * batadv_tt_global_hash_count - count the number of orig entries | |
d15cd622 | 265 | * @bat_priv: the bat priv with all the soft interface information |
1d8ab8d3 LL |
266 | * @addr: the mac address of the client to count entries for |
267 | * @vid: VLAN identifier | |
268 | * | |
62fe710f | 269 | * Return: the number of originators advertising the given address/data |
1d8ab8d3 LL |
270 | * (excluding ourself). |
271 | */ | |
272 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 273 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
274 | { |
275 | struct batadv_tt_global_entry *tt_global_entry; | |
276 | int count; | |
277 | ||
278 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
279 | if (!tt_global_entry) | |
280 | return 0; | |
281 | ||
282 | count = atomic_read(&tt_global_entry->orig_list_count); | |
5dafd8a6 | 283 | batadv_tt_global_entry_put(tt_global_entry); |
1d8ab8d3 LL |
284 | |
285 | return count; | |
286 | } | |
287 | ||
7ea7b4a1 AQ |
288 | /** |
289 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
290 | * by vid | |
291 | * @bat_priv: the bat priv with all the soft interface information | |
292 | * @vid: the VLAN identifier of the sub-table to change | |
293 | * @v: the amount to sum to the local table size | |
294 | */ | |
295 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
296 | unsigned short vid, int v) | |
297 | { | |
298 | struct batadv_softif_vlan *vlan; | |
299 | ||
300 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
301 | if (!vlan) | |
302 | return; | |
303 | ||
304 | atomic_add(v, &vlan->tt.num_entries); | |
305 | ||
9c3bf081 | 306 | batadv_softif_vlan_put(vlan); |
7ea7b4a1 AQ |
307 | } |
308 | ||
309 | /** | |
310 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
311 | * vid | |
312 | * @bat_priv: the bat priv with all the soft interface information | |
313 | * @vid: the VLAN identifier | |
314 | */ | |
315 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
316 | unsigned short vid) | |
317 | { | |
318 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
319 | } | |
320 | ||
321 | /** | |
322 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
323 | * vid | |
324 | * @bat_priv: the bat priv with all the soft interface information | |
325 | * @vid: the VLAN identifier | |
326 | */ | |
327 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
328 | unsigned short vid) | |
329 | { | |
330 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
331 | } | |
332 | ||
333 | /** | |
d15cd622 AQ |
334 | * batadv_tt_global_size_mod - change the size by v of the global table |
335 | * for orig_node identified by vid | |
336 | * @orig_node: the originator for which the table has to be modified | |
7ea7b4a1 AQ |
337 | * @vid: the VLAN identifier |
338 | * @v: the amount to sum to the global table size | |
339 | */ | |
340 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
341 | unsigned short vid, int v) | |
342 | { | |
343 | struct batadv_orig_node_vlan *vlan; | |
344 | ||
345 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
346 | if (!vlan) | |
347 | return; | |
348 | ||
349 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
350 | spin_lock_bh(&orig_node->vlan_list_lock); | |
3db15209 SE |
351 | if (!hlist_unhashed(&vlan->list)) { |
352 | hlist_del_init_rcu(&vlan->list); | |
21754e25 | 353 | batadv_orig_node_vlan_put(vlan); |
3db15209 | 354 | } |
7ea7b4a1 | 355 | spin_unlock_bh(&orig_node->vlan_list_lock); |
7ea7b4a1 AQ |
356 | } |
357 | ||
21754e25 | 358 | batadv_orig_node_vlan_put(vlan); |
7ea7b4a1 AQ |
359 | } |
360 | ||
361 | /** | |
362 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
363 | * given vid | |
364 | * @orig_node: the originator which global table size has to be decreased | |
365 | * @vid: the vlan identifier | |
366 | */ | |
367 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
368 | unsigned short vid) | |
369 | { | |
370 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
371 | } | |
372 | ||
373 | /** | |
374 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
375 | * given vid | |
376 | * @orig_node: the originator which global table size has to be decreased | |
377 | * @vid: the vlan identifier | |
378 | */ | |
379 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
380 | unsigned short vid) | |
381 | { | |
382 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
383 | } | |
384 | ||
42eff6a6 SE |
385 | /** |
386 | * batadv_tt_orig_list_entry_release - release tt orig entry from lists and | |
387 | * queue for free after rcu grace period | |
6e8ef69d | 388 | * @ref: kref pointer of the tt orig entry |
42eff6a6 | 389 | */ |
6e8ef69d | 390 | static void batadv_tt_orig_list_entry_release(struct kref *ref) |
42eff6a6 | 391 | { |
6e8ef69d SE |
392 | struct batadv_tt_orig_list_entry *orig_entry; |
393 | ||
394 | orig_entry = container_of(ref, struct batadv_tt_orig_list_entry, | |
395 | refcount); | |
396 | ||
5d967310 | 397 | batadv_orig_node_put(orig_entry->orig_node); |
42eff6a6 SE |
398 | kfree_rcu(orig_entry, rcu); |
399 | } | |
400 | ||
6e8ef69d | 401 | /** |
7e2366c6 SE |
402 | * batadv_tt_orig_list_entry_put - decrement the tt orig entry refcounter and |
403 | * possibly release it | |
6e8ef69d SE |
404 | * @orig_entry: tt orig entry to be free'd |
405 | */ | |
a513088d | 406 | static void |
7e2366c6 | 407 | batadv_tt_orig_list_entry_put(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 408 | { |
6e8ef69d | 409 | kref_put(&orig_entry->refcount, batadv_tt_orig_list_entry_release); |
7683fdc1 AQ |
410 | } |
411 | ||
3abe4adb AQ |
412 | /** |
413 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
414 | * @bat_priv: the bat priv with all the soft interface information | |
415 | * @tt_local_entry: the TT entry involved in the event | |
416 | * @event_flags: flags to store in the event structure | |
417 | */ | |
56303d34 | 418 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 419 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 420 | u8 event_flags) |
a73105b8 | 421 | { |
56303d34 | 422 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 423 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 424 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
425 | bool event_removed = false; |
426 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
427 | |
428 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
429 | if (!tt_change_node) |
430 | return; | |
431 | ||
ff66c975 | 432 | tt_change_node->change.flags = flags; |
ca663046 AQ |
433 | memset(tt_change_node->change.reserved, 0, |
434 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 435 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 436 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 437 | |
acd34afa | 438 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
439 | |
440 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
441 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
442 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 443 | list) { |
3abe4adb | 444 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
445 | continue; |
446 | ||
447 | /* DEL+ADD in the same orig interval have no effect and can be | |
448 | * removed to avoid silly behaviour on the receiver side. The | |
449 | * other way around (ADD+DEL) can happen in case of roaming of | |
450 | * a client still in the NEW state. Roaming of NEW clients is | |
451 | * now possible due to automatically recognition of "temporary" | |
452 | * clients | |
453 | */ | |
acd34afa | 454 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
455 | if (!del_op_requested && del_op_entry) |
456 | goto del; | |
457 | if (del_op_requested && !del_op_entry) | |
458 | goto del; | |
3c4f7ab6 AQ |
459 | |
460 | /* this is a second add in the same originator interval. It | |
461 | * means that flags have been changed: update them! | |
462 | */ | |
463 | if (!del_op_requested && !del_op_entry) | |
464 | entry->change.flags = flags; | |
465 | ||
3b643de5 AQ |
466 | continue; |
467 | del: | |
468 | list_del(&entry->list); | |
469 | kfree(entry); | |
155e4e12 | 470 | kfree(tt_change_node); |
3b643de5 AQ |
471 | event_removed = true; |
472 | goto unlock; | |
473 | } | |
474 | ||
a73105b8 | 475 | /* track the change in the OGMinterval list */ |
807736f6 | 476 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
477 | |
478 | unlock: | |
807736f6 | 479 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 480 | |
3b643de5 | 481 | if (event_removed) |
807736f6 | 482 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 483 | else |
807736f6 | 484 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
485 | } |
486 | ||
335fbe0f ML |
487 | /** |
488 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
489 | * @changes_num: number of tt changes | |
490 | * | |
62fe710f | 491 | * Return: computed length in bytes. |
335fbe0f ML |
492 | */ |
493 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 494 | { |
335fbe0f | 495 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
496 | } |
497 | ||
298e6e68 AQ |
498 | /** |
499 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
500 | * @tt_len: available space | |
501 | * | |
62fe710f | 502 | * Return: the number of entries. |
298e6e68 | 503 | */ |
6b5e971a | 504 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
505 | { |
506 | return tt_len / batadv_tt_len(1); | |
507 | } | |
508 | ||
a19d3d85 ML |
509 | /** |
510 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
511 | * size when transmitted over the air | |
512 | * @bat_priv: the bat priv with all the soft interface information | |
513 | * | |
62fe710f | 514 | * Return: local translation table size in bytes. |
a19d3d85 ML |
515 | */ |
516 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
517 | { | |
4f248cff SE |
518 | u16 num_vlan = 0; |
519 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
520 | struct batadv_softif_vlan *vlan; |
521 | int hdr_size; | |
522 | ||
523 | rcu_read_lock(); | |
524 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
525 | num_vlan++; | |
526 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
527 | } | |
528 | rcu_read_unlock(); | |
529 | ||
530 | /* header size of tvlv encapsulated tt response payload */ | |
531 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
532 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
533 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
534 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
535 | ||
536 | return hdr_size + batadv_tt_len(tt_local_entries); | |
537 | } | |
538 | ||
56303d34 | 539 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 540 | { |
807736f6 | 541 | if (bat_priv->tt.local_hash) |
5346c35e | 542 | return 0; |
c6c8fea2 | 543 | |
807736f6 | 544 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 545 | |
807736f6 | 546 | if (!bat_priv->tt.local_hash) |
5346c35e | 547 | return -ENOMEM; |
c6c8fea2 | 548 | |
dec05074 AQ |
549 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
550 | &batadv_tt_local_hash_lock_class_key); | |
551 | ||
5346c35e | 552 | return 0; |
c6c8fea2 SE |
553 | } |
554 | ||
068ee6e2 AQ |
555 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
556 | struct batadv_tt_global_entry *tt_global, | |
557 | const char *message) | |
558 | { | |
559 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
560 | "Deleting global tt entry %pM (vid: %d): %s\n", |
561 | tt_global->common.addr, | |
562 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
563 | |
564 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 565 | batadv_choose_tt, &tt_global->common); |
5dafd8a6 | 566 | batadv_tt_global_entry_put(tt_global); |
068ee6e2 AQ |
567 | } |
568 | ||
c018ad3d AQ |
569 | /** |
570 | * batadv_tt_local_add - add a new client to the local table or update an | |
571 | * existing client | |
572 | * @soft_iface: netdev struct of the mesh interface | |
573 | * @addr: the mac address of the client to add | |
574 | * @vid: VLAN identifier | |
575 | * @ifindex: index of the interface where the client is connected to (useful to | |
576 | * identify wireless clients) | |
9464d071 AQ |
577 | * @mark: the value contained in the skb->mark field of the received packet (if |
578 | * any) | |
a19d3d85 | 579 | * |
62fe710f | 580 | * Return: true if the client was successfully added, false otherwise. |
c018ad3d | 581 | */ |
6b5e971a SE |
582 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
583 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 584 | { |
56303d34 | 585 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 586 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 587 | struct batadv_tt_global_entry *tt_global = NULL; |
35df3b29 | 588 | struct batadv_softif_vlan *vlan; |
0c69aecc | 589 | struct net_device *in_dev = NULL; |
db08e6e5 | 590 | struct hlist_head *head; |
56303d34 | 591 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 592 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
593 | bool ret = false; |
594 | bool roamed_back = false; | |
6b5e971a SE |
595 | u8 remote_flags; |
596 | u32 match_mark; | |
c6c8fea2 | 597 | |
0c69aecc AQ |
598 | if (ifindex != BATADV_NULL_IFINDEX) |
599 | in_dev = dev_get_by_index(&init_net, ifindex); | |
600 | ||
c018ad3d | 601 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
602 | |
603 | if (!is_multicast_ether_addr(addr)) | |
604 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 605 | |
47c94655 AQ |
606 | if (tt_local) { |
607 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
608 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
609 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
610 | "Re-adding pending client %pM (vid: %d)\n", |
611 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
612 | /* whatever the reason why the PENDING flag was set, |
613 | * this is a client which was enqueued to be removed in | |
614 | * this orig_interval. Since it popped up again, the | |
615 | * flag can be reset like it was never enqueued | |
616 | */ | |
617 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
618 | goto add_event; | |
619 | } | |
620 | ||
621 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
622 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
623 | "Roaming client %pM (vid: %d) came back to its original location\n", |
624 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
625 | /* the ROAM flag is set because this client roamed away |
626 | * and the node got a roaming_advertisement message. Now | |
627 | * that the client popped up again at its original | |
628 | * location such flag can be unset | |
629 | */ | |
630 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
631 | roamed_back = true; | |
632 | } | |
633 | goto check_roaming; | |
c6c8fea2 SE |
634 | } |
635 | ||
a19d3d85 ML |
636 | /* Ignore the client if we cannot send it in a full table response. */ |
637 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
638 | table_size += batadv_tt_len(1); | |
639 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
640 | if (table_size > packet_size_max) { | |
641 | net_ratelimited_function(batadv_info, soft_iface, | |
642 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
643 | table_size, packet_size_max, addr); | |
644 | goto out; | |
645 | } | |
646 | ||
47c94655 AQ |
647 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
648 | if (!tt_local) | |
7683fdc1 | 649 | goto out; |
a73105b8 | 650 | |
35df3b29 AQ |
651 | /* increase the refcounter of the related vlan */ |
652 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc | 653 | if (WARN(!vlan, "adding TT local entry %pM to non-existent VLAN %d", |
fd7dec25 SE |
654 | addr, BATADV_PRINT_VID(vid))) { |
655 | kfree(tt_local); | |
656 | tt_local = NULL; | |
354136bc | 657 | goto out; |
fd7dec25 | 658 | } |
35df3b29 | 659 | |
39c75a51 | 660 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
661 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
662 | addr, BATADV_PRINT_VID(vid), | |
6b5e971a | 663 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 664 | |
8fdd0153 | 665 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
666 | /* The local entry has to be marked as NEW to avoid to send it in |
667 | * a full table response going out before the next ttvn increment | |
668 | * (consistency check) | |
669 | */ | |
670 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 671 | tt_local->common.vid = vid; |
0c69aecc | 672 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 | 673 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
92dcdf09 SE |
674 | kref_init(&tt_local->common.refcount); |
675 | kref_get(&tt_local->common.refcount); | |
47c94655 AQ |
676 | tt_local->last_seen = jiffies; |
677 | tt_local->common.added_at = tt_local->last_seen; | |
a33d970d | 678 | tt_local->vlan = vlan; |
c6c8fea2 | 679 | |
c5caf4ef LL |
680 | /* the batman interface mac and multicast addresses should never be |
681 | * purged | |
682 | */ | |
683 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
684 | is_multicast_ether_addr(addr)) | |
47c94655 | 685 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 686 | |
807736f6 | 687 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 688 | batadv_choose_tt, &tt_local->common, |
47c94655 | 689 | &tt_local->common.hash_entry); |
80b3f58c SW |
690 | |
691 | if (unlikely(hash_added != 0)) { | |
692 | /* remove the reference for the hash */ | |
95c0db90 | 693 | batadv_tt_local_entry_put(tt_local); |
9c3bf081 | 694 | batadv_softif_vlan_put(vlan); |
80b3f58c SW |
695 | goto out; |
696 | } | |
697 | ||
068ee6e2 | 698 | add_event: |
3abe4adb | 699 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 700 | |
068ee6e2 AQ |
701 | check_roaming: |
702 | /* Check whether it is a roaming, but don't do anything if the roaming | |
703 | * process has already been handled | |
704 | */ | |
705 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 706 | /* These node are probably going to update their tt table */ |
47c94655 | 707 | head = &tt_global->orig_list; |
db08e6e5 | 708 | rcu_read_lock(); |
b67bfe0d | 709 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 710 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 711 | tt_global->common.vid, |
a513088d | 712 | orig_entry->orig_node); |
db08e6e5 SW |
713 | } |
714 | rcu_read_unlock(); | |
068ee6e2 AQ |
715 | if (roamed_back) { |
716 | batadv_tt_global_free(bat_priv, tt_global, | |
717 | "Roaming canceled"); | |
718 | tt_global = NULL; | |
719 | } else { | |
720 | /* The global entry has to be marked as ROAMING and | |
721 | * has to be kept for consistency purpose | |
722 | */ | |
723 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
724 | tt_global->roam_at = jiffies; | |
725 | } | |
7683fdc1 | 726 | } |
068ee6e2 | 727 | |
3c4f7ab6 AQ |
728 | /* store the current remote flags before altering them. This helps |
729 | * understanding is flags are changing or not | |
730 | */ | |
731 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
732 | ||
733 | if (batadv_is_wifi_netdev(in_dev)) | |
734 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
735 | else | |
736 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 737 | |
9464d071 AQ |
738 | /* check the mark in the skb: if it's equal to the configured |
739 | * isolation_mark, it means the packet is coming from an isolated | |
740 | * non-mesh client | |
741 | */ | |
742 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
743 | if (bat_priv->isolation_mark_mask && | |
744 | match_mark == bat_priv->isolation_mark) | |
745 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
746 | else | |
747 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
748 | ||
3c4f7ab6 AQ |
749 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
750 | * entry so that all the nodes can get the new flags | |
751 | */ | |
752 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
753 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
754 | ||
755 | ret = true; | |
7683fdc1 | 756 | out: |
0c69aecc AQ |
757 | if (in_dev) |
758 | dev_put(in_dev); | |
47c94655 | 759 | if (tt_local) |
95c0db90 | 760 | batadv_tt_local_entry_put(tt_local); |
47c94655 | 761 | if (tt_global) |
5dafd8a6 | 762 | batadv_tt_global_entry_put(tt_global); |
a19d3d85 | 763 | return ret; |
c6c8fea2 SE |
764 | } |
765 | ||
7ea7b4a1 AQ |
766 | /** |
767 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
768 | * within a TT Response directed to another node | |
769 | * @orig_node: originator for which the TT data has to be prepared | |
770 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
771 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
772 | * changed can be stored | |
773 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
774 | * function reserves the amount of space needed to send the entire global TT | |
775 | * table. In case of success the value is updated with the real amount of | |
776 | * reserved bytes | |
7ea7b4a1 AQ |
777 | * Allocate the needed amount of memory for the entire TT TVLV and write its |
778 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
779 | * objects, one per active VLAN served by the originator node. | |
780 | * | |
62fe710f | 781 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 782 | */ |
6b5e971a | 783 | static u16 |
7ea7b4a1 AQ |
784 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
785 | struct batadv_tvlv_tt_data **tt_data, | |
786 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 787 | s32 *tt_len) |
7ea7b4a1 | 788 | { |
4f248cff SE |
789 | u16 num_vlan = 0; |
790 | u16 num_entries = 0; | |
791 | u16 change_offset; | |
792 | u16 tvlv_len; | |
7ea7b4a1 AQ |
793 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
794 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 795 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
796 | |
797 | rcu_read_lock(); | |
d0fa4f3f | 798 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
799 | num_vlan++; |
800 | num_entries += atomic_read(&vlan->tt.num_entries); | |
801 | } | |
802 | ||
803 | change_offset = sizeof(**tt_data); | |
804 | change_offset += num_vlan * sizeof(*tt_vlan); | |
805 | ||
806 | /* if tt_len is negative, allocate the space needed by the full table */ | |
807 | if (*tt_len < 0) | |
808 | *tt_len = batadv_tt_len(num_entries); | |
809 | ||
810 | tvlv_len = *tt_len; | |
811 | tvlv_len += change_offset; | |
812 | ||
813 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
814 | if (!*tt_data) { | |
815 | *tt_len = 0; | |
816 | goto out; | |
817 | } | |
818 | ||
819 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
820 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
821 | (*tt_data)->num_vlan = htons(num_vlan); | |
822 | ||
823 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
d0fa4f3f | 824 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
825 | tt_vlan->vid = htons(vlan->vid); |
826 | tt_vlan->crc = htonl(vlan->tt.crc); | |
827 | ||
828 | tt_vlan++; | |
829 | } | |
830 | ||
6b5e971a | 831 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
832 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
833 | ||
834 | out: | |
835 | rcu_read_unlock(); | |
836 | return tvlv_len; | |
837 | } | |
838 | ||
839 | /** | |
840 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
841 | * node | |
842 | * @bat_priv: the bat priv with all the soft interface information | |
843 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
844 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
845 | * changes can be stored | |
846 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
847 | * function reserves the amount of space needed to send the entire local TT | |
848 | * table. In case of success the value is updated with the real amount of | |
849 | * reserved bytes | |
850 | * | |
851 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
852 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
853 | * objects, one per active VLAN. | |
854 | * | |
62fe710f | 855 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 856 | */ |
6b5e971a | 857 | static u16 |
7ea7b4a1 AQ |
858 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
859 | struct batadv_tvlv_tt_data **tt_data, | |
860 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 861 | s32 *tt_len) |
7ea7b4a1 AQ |
862 | { |
863 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
864 | struct batadv_softif_vlan *vlan; | |
4f248cff SE |
865 | u16 num_vlan = 0; |
866 | u16 num_entries = 0; | |
867 | u16 tvlv_len; | |
6b5e971a | 868 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
869 | int change_offset; |
870 | ||
871 | rcu_read_lock(); | |
872 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
873 | num_vlan++; | |
874 | num_entries += atomic_read(&vlan->tt.num_entries); | |
875 | } | |
876 | ||
877 | change_offset = sizeof(**tt_data); | |
878 | change_offset += num_vlan * sizeof(*tt_vlan); | |
879 | ||
880 | /* if tt_len is negative, allocate the space needed by the full table */ | |
881 | if (*tt_len < 0) | |
882 | *tt_len = batadv_tt_len(num_entries); | |
883 | ||
884 | tvlv_len = *tt_len; | |
885 | tvlv_len += change_offset; | |
886 | ||
887 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
888 | if (!*tt_data) { | |
889 | tvlv_len = 0; | |
890 | goto out; | |
891 | } | |
892 | ||
893 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
894 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
895 | (*tt_data)->num_vlan = htons(num_vlan); | |
896 | ||
897 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
898 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
899 | tt_vlan->vid = htons(vlan->vid); | |
900 | tt_vlan->crc = htonl(vlan->tt.crc); | |
901 | ||
902 | tt_vlan++; | |
903 | } | |
904 | ||
6b5e971a | 905 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
906 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
907 | ||
908 | out: | |
909 | rcu_read_unlock(); | |
910 | return tvlv_len; | |
911 | } | |
912 | ||
e1bf0c14 ML |
913 | /** |
914 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
915 | * after local tt changes have been committed | |
916 | * @bat_priv: the bat priv with all the soft interface information | |
917 | */ | |
918 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 919 | { |
e1bf0c14 ML |
920 | struct batadv_tt_change_node *entry, *safe; |
921 | struct batadv_tvlv_tt_data *tt_data; | |
922 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 923 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
924 | int tt_diff_entries_num = 0; |
925 | int tt_diff_entries_count = 0; | |
6b5e971a | 926 | u16 tvlv_len; |
be9aa4c1 | 927 | |
7ea7b4a1 AQ |
928 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
929 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
930 | |
931 | /* if we have too many changes for one packet don't send any | |
932 | * and wait for the tt table request which will be fragmented | |
933 | */ | |
e1bf0c14 ML |
934 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
935 | tt_diff_len = 0; | |
be9aa4c1 | 936 | |
7ea7b4a1 AQ |
937 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
938 | &tt_change, &tt_diff_len); | |
939 | if (!tvlv_len) | |
e1bf0c14 | 940 | return; |
be9aa4c1 | 941 | |
e1bf0c14 | 942 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 943 | |
e1bf0c14 ML |
944 | if (tt_diff_len == 0) |
945 | goto container_register; | |
be9aa4c1 | 946 | |
807736f6 SE |
947 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
948 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 949 | |
807736f6 | 950 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 951 | list) { |
e1bf0c14 ML |
952 | if (tt_diff_entries_count < tt_diff_entries_num) { |
953 | memcpy(tt_change + tt_diff_entries_count, | |
954 | &entry->change, | |
955 | sizeof(struct batadv_tvlv_tt_change)); | |
956 | tt_diff_entries_count++; | |
c6c8fea2 | 957 | } |
a73105b8 AQ |
958 | list_del(&entry->list); |
959 | kfree(entry); | |
c6c8fea2 | 960 | } |
807736f6 | 961 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
962 | |
963 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
964 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
965 | kfree(bat_priv->tt.last_changeset); | |
966 | bat_priv->tt.last_changeset_len = 0; | |
967 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 968 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 969 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 970 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 971 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
972 | * instead of providing the diff |
973 | */ | |
e1bf0c14 | 974 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 975 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
976 | memcpy(bat_priv->tt.last_changeset, |
977 | tt_change, tt_change_len); | |
978 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
979 | } |
980 | } | |
807736f6 | 981 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 982 | |
e1bf0c14 ML |
983 | container_register: |
984 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 985 | tvlv_len); |
e1bf0c14 | 986 | kfree(tt_data); |
c6c8fea2 SE |
987 | } |
988 | ||
08c36d3e | 989 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
990 | { |
991 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 992 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 993 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 994 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 995 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 996 | struct batadv_hard_iface *primary_if; |
c6c8fea2 | 997 | struct hlist_head *head; |
7ea7b4a1 | 998 | unsigned short vid; |
6b5e971a | 999 | u32 i; |
85766a82 AQ |
1000 | int last_seen_secs; |
1001 | int last_seen_msecs; | |
1002 | unsigned long last_seen_jiffies; | |
1003 | bool no_purge; | |
6b5e971a | 1004 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 1005 | |
30da63a6 ML |
1006 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1007 | if (!primary_if) | |
32ae9b22 | 1008 | goto out; |
c6c8fea2 | 1009 | |
86ceb360 | 1010 | seq_printf(seq, |
7ea7b4a1 | 1011 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 1012 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
dd24ddb2 | 1013 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 1014 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 1015 | |
c6c8fea2 SE |
1016 | for (i = 0; i < hash->size; i++) { |
1017 | head = &hash->table[i]; | |
1018 | ||
7aadf889 | 1019 | rcu_read_lock(); |
b67bfe0d | 1020 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1021 | head, hash_entry) { |
85766a82 AQ |
1022 | tt_local = container_of(tt_common_entry, |
1023 | struct batadv_tt_local_entry, | |
1024 | common); | |
7ea7b4a1 | 1025 | vid = tt_common_entry->vid; |
85766a82 AQ |
1026 | last_seen_jiffies = jiffies - tt_local->last_seen; |
1027 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1028 | last_seen_secs = last_seen_msecs / 1000; | |
1029 | last_seen_msecs = last_seen_msecs % 1000; | |
1030 | ||
1031 | no_purge = tt_common_entry->flags & np_flag; | |
7ea7b4a1 | 1032 | seq_printf(seq, |
dd24ddb2 | 1033 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 1034 | tt_common_entry->addr, |
16052789 | 1035 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
1036 | ((tt_common_entry->flags & |
1037 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 1038 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
1039 | ((tt_common_entry->flags & |
1040 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
1041 | ((tt_common_entry->flags & | |
1042 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
1043 | ((tt_common_entry->flags & | |
1044 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1045 | ((tt_common_entry->flags & | |
1046 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1047 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 | 1048 | no_purge ? 0 : last_seen_msecs, |
a33d970d | 1049 | tt_local->vlan->tt.crc); |
c6c8fea2 | 1050 | } |
7aadf889 | 1051 | rcu_read_unlock(); |
c6c8fea2 | 1052 | } |
32ae9b22 ML |
1053 | out: |
1054 | if (primary_if) | |
82047ad7 | 1055 | batadv_hardif_put(primary_if); |
30da63a6 | 1056 | return 0; |
c6c8fea2 SE |
1057 | } |
1058 | ||
56303d34 SE |
1059 | static void |
1060 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1061 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1062 | u16 flags, const char *message) |
c6c8fea2 | 1063 | { |
3abe4adb | 1064 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1065 | |
015758d0 AQ |
1066 | /* The local client has to be marked as "pending to be removed" but has |
1067 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1068 | * response issued before the net ttvn increment (consistency check) |
1069 | */ | |
acd34afa | 1070 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1071 | |
39c75a51 | 1072 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1073 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1074 | tt_local_entry->common.addr, | |
1075 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1076 | } |
1077 | ||
7f91d06c AQ |
1078 | /** |
1079 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1080 | * @bat_priv: the bat priv with all the soft interface information | |
1081 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1082 | * @vid: VLAN identifier |
7f91d06c AQ |
1083 | * @message: message to append to the log on deletion |
1084 | * @roaming: true if the deletion is due to a roaming event | |
1085 | * | |
62fe710f | 1086 | * Return: the flags assigned to the local entry before being deleted |
7f91d06c | 1087 | */ |
6b5e971a SE |
1088 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1089 | unsigned short vid, const char *message, | |
1090 | bool roaming) | |
c6c8fea2 | 1091 | { |
170173bf | 1092 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1093 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
ef72706a | 1094 | void *tt_entry_exists; |
c6c8fea2 | 1095 | |
c018ad3d | 1096 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1097 | if (!tt_local_entry) |
1098 | goto out; | |
1099 | ||
7f91d06c AQ |
1100 | curr_flags = tt_local_entry->common.flags; |
1101 | ||
acd34afa | 1102 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1103 | /* if this global entry addition is due to a roaming, the node has to |
1104 | * mark the local entry as "roamed" in order to correctly reroute | |
1105 | * packets later | |
1106 | */ | |
7c1fd91d | 1107 | if (roaming) { |
acd34afa | 1108 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1109 | /* mark the local client as ROAMed */ |
1110 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1111 | } | |
42d0b044 | 1112 | |
068ee6e2 AQ |
1113 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1114 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1115 | message); | |
1116 | goto out; | |
1117 | } | |
1118 | /* if this client has been added right now, it is possible to | |
1119 | * immediately purge it | |
1120 | */ | |
3abe4adb | 1121 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1122 | |
1123 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1124 | batadv_compare_tt, | |
1125 | batadv_choose_tt, | |
1126 | &tt_local_entry->common); | |
1127 | if (!tt_entry_exists) | |
1128 | goto out; | |
1129 | ||
1130 | /* extra call to free the local tt entry */ | |
95c0db90 | 1131 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c | 1132 | |
7683fdc1 AQ |
1133 | out: |
1134 | if (tt_local_entry) | |
95c0db90 | 1135 | batadv_tt_local_entry_put(tt_local_entry); |
7f91d06c AQ |
1136 | |
1137 | return curr_flags; | |
c6c8fea2 SE |
1138 | } |
1139 | ||
a19d3d85 ML |
1140 | /** |
1141 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1142 | * @bat_priv: the bat priv with all the soft interface information | |
1143 | * @head: pointer to the list containing the local tt entries | |
1144 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1145 | * inactive or not | |
1146 | */ | |
56303d34 | 1147 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1148 | struct hlist_head *head, |
1149 | int timeout) | |
c6c8fea2 | 1150 | { |
56303d34 SE |
1151 | struct batadv_tt_local_entry *tt_local_entry; |
1152 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1153 | struct hlist_node *node_tmp; |
acd34afa | 1154 | |
b67bfe0d | 1155 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1156 | hash_entry) { |
1157 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1158 | struct batadv_tt_local_entry, |
1159 | common); | |
acd34afa SE |
1160 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1161 | continue; | |
1162 | ||
1163 | /* entry already marked for deletion */ | |
1164 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1165 | continue; | |
1166 | ||
a19d3d85 | 1167 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1168 | continue; |
1169 | ||
1170 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1171 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1172 | } | |
1173 | } | |
1174 | ||
a19d3d85 ML |
1175 | /** |
1176 | * batadv_tt_local_purge - purge inactive tt local entries | |
1177 | * @bat_priv: the bat priv with all the soft interface information | |
1178 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1179 | * inactive or not | |
1180 | */ | |
1181 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1182 | int timeout) | |
acd34afa | 1183 | { |
807736f6 | 1184 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1185 | struct hlist_head *head; |
7683fdc1 | 1186 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1187 | u32 i; |
c6c8fea2 | 1188 | |
c6c8fea2 SE |
1189 | for (i = 0; i < hash->size; i++) { |
1190 | head = &hash->table[i]; | |
7683fdc1 | 1191 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1192 | |
7683fdc1 | 1193 | spin_lock_bh(list_lock); |
a19d3d85 | 1194 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1195 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1196 | } |
c6c8fea2 SE |
1197 | } |
1198 | ||
56303d34 | 1199 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1200 | { |
5bf74e9c | 1201 | struct batadv_hashtable *hash; |
a73105b8 | 1202 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1203 | struct batadv_tt_common_entry *tt_common_entry; |
1204 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 1205 | struct hlist_node *node_tmp; |
7683fdc1 | 1206 | struct hlist_head *head; |
6b5e971a | 1207 | u32 i; |
a73105b8 | 1208 | |
807736f6 | 1209 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1210 | return; |
1211 | ||
807736f6 | 1212 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1213 | |
1214 | for (i = 0; i < hash->size; i++) { | |
1215 | head = &hash->table[i]; | |
1216 | list_lock = &hash->list_locks[i]; | |
1217 | ||
1218 | spin_lock_bh(list_lock); | |
b67bfe0d | 1219 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1220 | head, hash_entry) { |
b67bfe0d | 1221 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1222 | tt_local = container_of(tt_common_entry, |
1223 | struct batadv_tt_local_entry, | |
1224 | common); | |
35df3b29 | 1225 | |
95c0db90 | 1226 | batadv_tt_local_entry_put(tt_local); |
a73105b8 AQ |
1227 | } |
1228 | spin_unlock_bh(list_lock); | |
1229 | } | |
1230 | ||
1a8eaf07 | 1231 | batadv_hash_destroy(hash); |
a73105b8 | 1232 | |
807736f6 | 1233 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1234 | } |
1235 | ||
56303d34 | 1236 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1237 | { |
807736f6 | 1238 | if (bat_priv->tt.global_hash) |
5346c35e | 1239 | return 0; |
c6c8fea2 | 1240 | |
807736f6 | 1241 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1242 | |
807736f6 | 1243 | if (!bat_priv->tt.global_hash) |
5346c35e | 1244 | return -ENOMEM; |
c6c8fea2 | 1245 | |
dec05074 AQ |
1246 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1247 | &batadv_tt_global_hash_lock_class_key); | |
1248 | ||
5346c35e | 1249 | return 0; |
c6c8fea2 SE |
1250 | } |
1251 | ||
56303d34 | 1252 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1253 | { |
56303d34 | 1254 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1255 | |
807736f6 | 1256 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1257 | |
807736f6 | 1258 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1259 | list) { |
1260 | list_del(&entry->list); | |
1261 | kfree(entry); | |
1262 | } | |
c6c8fea2 | 1263 | |
807736f6 SE |
1264 | atomic_set(&bat_priv->tt.local_changes, 0); |
1265 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1266 | } |
c6c8fea2 | 1267 | |
62fe710f | 1268 | /** |
d15cd622 AQ |
1269 | * batadv_tt_global_orig_entry_find - find a TT orig_list_entry |
1270 | * @entry: the TT global entry where the orig_list_entry has to be | |
1271 | * extracted from | |
1272 | * @orig_node: the originator for which the orig_list_entry has to be found | |
62fe710f | 1273 | * |
d15cd622 | 1274 | * retrieve the orig_tt_list_entry belonging to orig_node from the |
d657e621 AQ |
1275 | * batadv_tt_global_entry list |
1276 | * | |
62fe710f | 1277 | * Return: it with an increased refcounter, NULL if not found |
db08e6e5 | 1278 | */ |
d657e621 AQ |
1279 | static struct batadv_tt_orig_list_entry * |
1280 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1281 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1282 | { |
d657e621 | 1283 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1284 | const struct hlist_head *head; |
db08e6e5 SW |
1285 | |
1286 | rcu_read_lock(); | |
1287 | head = &entry->orig_list; | |
b67bfe0d | 1288 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1289 | if (tmp_orig_entry->orig_node != orig_node) |
1290 | continue; | |
6e8ef69d | 1291 | if (!kref_get_unless_zero(&tmp_orig_entry->refcount)) |
d657e621 AQ |
1292 | continue; |
1293 | ||
1294 | orig_entry = tmp_orig_entry; | |
1295 | break; | |
db08e6e5 SW |
1296 | } |
1297 | rcu_read_unlock(); | |
d657e621 AQ |
1298 | |
1299 | return orig_entry; | |
1300 | } | |
1301 | ||
62fe710f | 1302 | /** |
d15cd622 AQ |
1303 | * batadv_tt_global_entry_has_orig - check if a TT global entry is also handled |
1304 | * by a given originator | |
1305 | * @entry: the TT global entry to check | |
1306 | * @orig_node: the originator to search in the list | |
62fe710f SE |
1307 | * |
1308 | * find out if an orig_node is already in the list of a tt_global_entry. | |
1309 | * | |
1310 | * Return: true if found, false otherwise | |
d657e621 AQ |
1311 | */ |
1312 | static bool | |
1313 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1314 | const struct batadv_orig_node *orig_node) | |
1315 | { | |
1316 | struct batadv_tt_orig_list_entry *orig_entry; | |
1317 | bool found = false; | |
1318 | ||
1319 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1320 | if (orig_entry) { | |
1321 | found = true; | |
7e2366c6 | 1322 | batadv_tt_orig_list_entry_put(orig_entry); |
d657e621 AQ |
1323 | } |
1324 | ||
db08e6e5 SW |
1325 | return found; |
1326 | } | |
1327 | ||
a513088d | 1328 | static void |
d657e621 | 1329 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1330 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1331 | { |
56303d34 | 1332 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1333 | |
d657e621 | 1334 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1335 | if (orig_entry) { |
1336 | /* refresh the ttvn: the current value could be a bogus one that | |
1337 | * was added during a "temporary client detection" | |
1338 | */ | |
1339 | orig_entry->ttvn = ttvn; | |
d657e621 | 1340 | goto out; |
30cfd02b | 1341 | } |
d657e621 | 1342 | |
db08e6e5 SW |
1343 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1344 | if (!orig_entry) | |
d657e621 | 1345 | goto out; |
db08e6e5 SW |
1346 | |
1347 | INIT_HLIST_NODE(&orig_entry->list); | |
7c124391 | 1348 | kref_get(&orig_node->refcount); |
7ea7b4a1 | 1349 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1350 | orig_entry->orig_node = orig_node; |
1351 | orig_entry->ttvn = ttvn; | |
6e8ef69d SE |
1352 | kref_init(&orig_entry->refcount); |
1353 | kref_get(&orig_entry->refcount); | |
db08e6e5 | 1354 | |
d657e621 | 1355 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1356 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1357 | &tt_global->orig_list); |
1358 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1359 | atomic_inc(&tt_global->orig_list_count); |
1360 | ||
d657e621 AQ |
1361 | out: |
1362 | if (orig_entry) | |
7e2366c6 | 1363 | batadv_tt_orig_list_entry_put(orig_entry); |
db08e6e5 SW |
1364 | } |
1365 | ||
d4ff40f6 AQ |
1366 | /** |
1367 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1368 | * @bat_priv: the bat priv with all the soft interface information | |
1369 | * @orig_node: the originator announcing the client | |
1370 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1371 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1372 | * @flags: TT flags that have to be set for this non-mesh client |
1373 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1374 | * | |
1375 | * Add a new TT global entry for the given originator. If the entry already | |
1376 | * exists add a new reference to the given originator (a global entry can have | |
1377 | * references to multiple originators) and adjust the flags attribute to reflect | |
1378 | * the function argument. | |
1379 | * If a TT local entry exists for this non-mesh client remove it. | |
1380 | * | |
1381 | * The caller must hold orig_node refcount. | |
1e5d49fc | 1382 | * |
62fe710f | 1383 | * Return: true if the new entry has been added, false otherwise |
d4ff40f6 | 1384 | */ |
1e5d49fc AQ |
1385 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1386 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1387 | const unsigned char *tt_addr, |
6b5e971a | 1388 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1389 | { |
170173bf SE |
1390 | struct batadv_tt_global_entry *tt_global_entry; |
1391 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1392 | bool ret = false; |
80b3f58c | 1393 | int hash_added; |
56303d34 | 1394 | struct batadv_tt_common_entry *common; |
6b5e971a | 1395 | u16 local_flags; |
c6c8fea2 | 1396 | |
cfd4f757 AQ |
1397 | /* ignore global entries from backbone nodes */ |
1398 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1399 | return true; | |
1400 | ||
c018ad3d AQ |
1401 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1402 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1403 | |
1404 | /* if the node already has a local client for this entry, it has to wait | |
1405 | * for a roaming advertisement instead of manually messing up the global | |
1406 | * table | |
1407 | */ | |
1408 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1409 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1410 | goto out; | |
a73105b8 AQ |
1411 | |
1412 | if (!tt_global_entry) { | |
d4f44692 | 1413 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1414 | if (!tt_global_entry) |
7683fdc1 AQ |
1415 | goto out; |
1416 | ||
c0a55929 | 1417 | common = &tt_global_entry->common; |
8fdd0153 | 1418 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1419 | common->vid = vid; |
db08e6e5 | 1420 | |
d4f44692 | 1421 | common->flags = flags; |
cc47f66e | 1422 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1423 | /* node must store current time in case of roaming. This is |
1424 | * needed to purge this entry out on timeout (if nobody claims | |
1425 | * it) | |
1426 | */ | |
1427 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1428 | tt_global_entry->roam_at = jiffies; | |
92dcdf09 SE |
1429 | kref_init(&common->refcount); |
1430 | kref_get(&common->refcount); | |
30cfd02b | 1431 | common->added_at = jiffies; |
db08e6e5 SW |
1432 | |
1433 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1434 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1435 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1436 | |
807736f6 | 1437 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1438 | batadv_compare_tt, |
c018ad3d | 1439 | batadv_choose_tt, common, |
a513088d | 1440 | &common->hash_entry); |
80b3f58c SW |
1441 | |
1442 | if (unlikely(hash_added != 0)) { | |
1443 | /* remove the reference for the hash */ | |
5dafd8a6 | 1444 | batadv_tt_global_entry_put(tt_global_entry); |
80b3f58c SW |
1445 | goto out_remove; |
1446 | } | |
a73105b8 | 1447 | } else { |
068ee6e2 | 1448 | common = &tt_global_entry->common; |
30cfd02b AQ |
1449 | /* If there is already a global entry, we can use this one for |
1450 | * our processing. | |
068ee6e2 AQ |
1451 | * But if we are trying to add a temporary client then here are |
1452 | * two options at this point: | |
1453 | * 1) the global client is not a temporary client: the global | |
1454 | * client has to be left as it is, temporary information | |
1455 | * should never override any already known client state | |
1456 | * 2) the global client is a temporary client: purge the | |
1457 | * originator list and add the new one orig_entry | |
30cfd02b | 1458 | */ |
068ee6e2 AQ |
1459 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1460 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1461 | goto out; | |
1462 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1463 | orig_node)) | |
1464 | goto out_remove; | |
1465 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1466 | goto add_orig_entry; | |
1467 | } | |
30cfd02b AQ |
1468 | |
1469 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1470 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1471 | * remove the previous temporary orig node and re-add it | |
1472 | * if required. If the orig entry changed, the new one which | |
1473 | * is a non-temporary entry is preferred. | |
30cfd02b | 1474 | */ |
a6cb3909 SW |
1475 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1476 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1477 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1478 | } | |
db08e6e5 | 1479 | |
e9c00136 AQ |
1480 | /* the change can carry possible "attribute" flags like the |
1481 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1482 | * client entry | |
1483 | */ | |
ad7e2c46 | 1484 | common->flags |= flags; |
e9c00136 | 1485 | |
acd34afa SE |
1486 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1487 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1488 | * delete + roaming change for this originator. |
1489 | * | |
1490 | * We should first delete the old originator before adding the | |
1491 | * new one. | |
1492 | */ | |
068ee6e2 | 1493 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1494 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1495 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1496 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1497 | } |
1498 | } | |
068ee6e2 | 1499 | add_orig_entry: |
30cfd02b | 1500 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1501 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1502 | |
39c75a51 | 1503 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1504 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1505 | common->addr, BATADV_PRINT_VID(common->vid), | |
1506 | orig_node->orig); | |
1e5d49fc | 1507 | ret = true; |
c6c8fea2 | 1508 | |
80b3f58c | 1509 | out_remove: |
c5caf4ef LL |
1510 | /* Do not remove multicast addresses from the local hash on |
1511 | * global additions | |
1512 | */ | |
1513 | if (is_multicast_ether_addr(tt_addr)) | |
1514 | goto out; | |
7f91d06c | 1515 | |
a73105b8 | 1516 | /* remove address from local hash if present */ |
c018ad3d | 1517 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1518 | "global tt received", |
c1d07431 | 1519 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1520 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1521 | ||
068ee6e2 AQ |
1522 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1523 | /* this is a normal global add. Therefore the client is not in a | |
1524 | * roaming state anymore. | |
1525 | */ | |
1526 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1527 | ||
7683fdc1 AQ |
1528 | out: |
1529 | if (tt_global_entry) | |
5dafd8a6 | 1530 | batadv_tt_global_entry_put(tt_global_entry); |
068ee6e2 | 1531 | if (tt_local_entry) |
95c0db90 | 1532 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 1533 | return ret; |
c6c8fea2 SE |
1534 | } |
1535 | ||
1b371d13 SW |
1536 | /** |
1537 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1538 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1539 | * @tt_global_entry: global translation table entry to be analyzed |
1540 | * | |
1541 | * This functon assumes the caller holds rcu_read_lock(). | |
62fe710f | 1542 | * Return: best originator list entry or NULL on errors. |
981d8900 SE |
1543 | */ |
1544 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1545 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1546 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1547 | { |
4627456a AQ |
1548 | struct batadv_neigh_node *router, *best_router = NULL; |
1549 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1550 | struct hlist_head *head; |
981d8900 | 1551 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1552 | |
1553 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1554 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1555 | router = batadv_orig_router_get(orig_entry->orig_node, |
1556 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1557 | if (!router) |
1558 | continue; | |
1559 | ||
4627456a | 1560 | if (best_router && |
89652331 SW |
1561 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1562 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
25bb2509 | 1563 | batadv_neigh_node_put(router); |
4627456a | 1564 | continue; |
981d8900 SE |
1565 | } |
1566 | ||
4627456a AQ |
1567 | /* release the refcount for the "old" best */ |
1568 | if (best_router) | |
25bb2509 | 1569 | batadv_neigh_node_put(best_router); |
4627456a AQ |
1570 | |
1571 | best_entry = orig_entry; | |
1572 | best_router = router; | |
981d8900 SE |
1573 | } |
1574 | ||
4627456a | 1575 | if (best_router) |
25bb2509 | 1576 | batadv_neigh_node_put(best_router); |
4627456a | 1577 | |
981d8900 SE |
1578 | return best_entry; |
1579 | } | |
1580 | ||
1b371d13 SW |
1581 | /** |
1582 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1583 | * for this global entry | |
4627456a | 1584 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1585 | * @tt_global_entry: global translation table entry to be printed |
1586 | * @seq: debugfs table seq_file struct | |
1587 | * | |
1588 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1589 | */ |
a513088d | 1590 | static void |
4627456a AQ |
1591 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1592 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1593 | struct seq_file *seq) |
db08e6e5 | 1594 | { |
981d8900 | 1595 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1596 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1597 | struct batadv_orig_node_vlan *vlan; |
1598 | struct hlist_head *head; | |
6b5e971a SE |
1599 | u8 last_ttvn; |
1600 | u16 flags; | |
db08e6e5 SW |
1601 | |
1602 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1603 | flags = tt_common_entry->flags; |
1604 | ||
4627456a | 1605 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1606 | if (best_entry) { |
7ea7b4a1 AQ |
1607 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1608 | tt_common_entry->vid); | |
1609 | if (!vlan) { | |
1610 | seq_printf(seq, | |
1611 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1612 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1613 | best_entry->orig_node->orig); | |
1614 | goto print_list; | |
1615 | } | |
1616 | ||
981d8900 | 1617 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1618 | seq_printf(seq, |
dd24ddb2 | 1619 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1620 | '*', tt_global_entry->common.addr, |
16052789 | 1621 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1622 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1623 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1624 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1625 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1626 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1627 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 | 1628 | |
21754e25 | 1629 | batadv_orig_node_vlan_put(vlan); |
981d8900 | 1630 | } |
db08e6e5 | 1631 | |
7ea7b4a1 | 1632 | print_list: |
db08e6e5 SW |
1633 | head = &tt_global_entry->orig_list; |
1634 | ||
b67bfe0d | 1635 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1636 | if (best_entry == orig_entry) |
1637 | continue; | |
1638 | ||
7ea7b4a1 AQ |
1639 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1640 | tt_common_entry->vid); | |
1641 | if (!vlan) { | |
1642 | seq_printf(seq, | |
1643 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1644 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1645 | orig_entry->orig_node->orig); | |
1646 | continue; | |
1647 | } | |
1648 | ||
db08e6e5 | 1649 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1650 | seq_printf(seq, |
dd24ddb2 | 1651 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1652 | '+', tt_global_entry->common.addr, |
16052789 | 1653 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1654 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1655 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1656 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1657 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1658 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1659 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 | 1660 | |
21754e25 | 1661 | batadv_orig_node_vlan_put(vlan); |
db08e6e5 SW |
1662 | } |
1663 | } | |
1664 | ||
08c36d3e | 1665 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1666 | { |
1667 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1668 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1669 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1670 | struct batadv_tt_common_entry *tt_common_entry; |
1671 | struct batadv_tt_global_entry *tt_global; | |
1672 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1673 | struct hlist_head *head; |
6b5e971a | 1674 | u32 i; |
c6c8fea2 | 1675 | |
30da63a6 ML |
1676 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1677 | if (!primary_if) | |
32ae9b22 | 1678 | goto out; |
c6c8fea2 | 1679 | |
2dafb49d AQ |
1680 | seq_printf(seq, |
1681 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1682 | net_dev->name); |
16052789 AQ |
1683 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1684 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1685 | "CRC", "Flags"); | |
c6c8fea2 | 1686 | |
c6c8fea2 SE |
1687 | for (i = 0; i < hash->size; i++) { |
1688 | head = &hash->table[i]; | |
1689 | ||
7aadf889 | 1690 | rcu_read_lock(); |
b67bfe0d | 1691 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1692 | head, hash_entry) { |
56303d34 SE |
1693 | tt_global = container_of(tt_common_entry, |
1694 | struct batadv_tt_global_entry, | |
1695 | common); | |
4627456a | 1696 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1697 | } |
7aadf889 | 1698 | rcu_read_unlock(); |
c6c8fea2 | 1699 | } |
32ae9b22 ML |
1700 | out: |
1701 | if (primary_if) | |
82047ad7 | 1702 | batadv_hardif_put(primary_if); |
30da63a6 | 1703 | return 0; |
c6c8fea2 SE |
1704 | } |
1705 | ||
1d8ab8d3 | 1706 | /** |
433ff98f | 1707 | * _batadv_tt_global_del_orig_entry - remove and free an orig_entry |
1d8ab8d3 LL |
1708 | * @tt_global_entry: the global entry to remove the orig_entry from |
1709 | * @orig_entry: the orig entry to remove and free | |
1710 | * | |
1711 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1712 | * free this orig_entry afterwards. | |
433ff98f ML |
1713 | * |
1714 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
1715 | * part of a list. | |
1d8ab8d3 LL |
1716 | */ |
1717 | static void | |
433ff98f ML |
1718 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
1719 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 1720 | { |
2c72d655 SE |
1721 | lockdep_assert_held(&tt_global_entry->list_lock); |
1722 | ||
1d8ab8d3 LL |
1723 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1724 | tt_global_entry->common.vid); | |
1725 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
1726 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
1727 | * being part of a list | |
1728 | */ | |
1d8ab8d3 | 1729 | hlist_del_rcu(&orig_entry->list); |
7e2366c6 | 1730 | batadv_tt_orig_list_entry_put(orig_entry); |
1d8ab8d3 LL |
1731 | } |
1732 | ||
db08e6e5 | 1733 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1734 | static void |
56303d34 | 1735 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1736 | { |
db08e6e5 | 1737 | struct hlist_head *head; |
b67bfe0d | 1738 | struct hlist_node *safe; |
56303d34 | 1739 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1740 | |
db08e6e5 SW |
1741 | spin_lock_bh(&tt_global_entry->list_lock); |
1742 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 1743 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 1744 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 1745 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1746 | } |
1747 | ||
1d8ab8d3 LL |
1748 | /** |
1749 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1750 | * @bat_priv: the bat priv with all the soft interface information | |
1751 | * @tt_global_entry: the global entry to remove the orig_node from | |
1752 | * @orig_node: the originator announcing the client | |
1753 | * @message: message to append to the log on deletion | |
1754 | * | |
1755 | * Remove the given orig_node and its according orig_entry from the given | |
1756 | * global tt entry. | |
1757 | */ | |
a513088d | 1758 | static void |
1d8ab8d3 LL |
1759 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1760 | struct batadv_tt_global_entry *tt_global_entry, | |
1761 | struct batadv_orig_node *orig_node, | |
1762 | const char *message) | |
db08e6e5 SW |
1763 | { |
1764 | struct hlist_head *head; | |
b67bfe0d | 1765 | struct hlist_node *safe; |
56303d34 | 1766 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1767 | unsigned short vid; |
db08e6e5 SW |
1768 | |
1769 | spin_lock_bh(&tt_global_entry->list_lock); | |
1770 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1771 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1772 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1773 | vid = tt_global_entry->common.vid; |
39c75a51 | 1774 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1775 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1776 | orig_node->orig, |
16052789 AQ |
1777 | tt_global_entry->common.addr, |
1778 | BATADV_PRINT_VID(vid), message); | |
433ff98f ML |
1779 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
1780 | orig_entry); | |
db08e6e5 SW |
1781 | } |
1782 | } | |
1783 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1784 | } | |
1785 | ||
db08e6e5 | 1786 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1787 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1788 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1789 | */ |
a513088d | 1790 | static void |
56303d34 SE |
1791 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1792 | struct batadv_tt_global_entry *tt_global_entry, | |
1793 | struct batadv_orig_node *orig_node, | |
1794 | const char *message) | |
db08e6e5 SW |
1795 | { |
1796 | bool last_entry = true; | |
1797 | struct hlist_head *head; | |
56303d34 | 1798 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1799 | |
1800 | /* no local entry exists, case 1: | |
1801 | * Check if this is the last one or if other entries exist. | |
1802 | */ | |
1803 | ||
1804 | rcu_read_lock(); | |
1805 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1806 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1807 | if (orig_entry->orig_node != orig_node) { |
1808 | last_entry = false; | |
1809 | break; | |
1810 | } | |
1811 | } | |
1812 | rcu_read_unlock(); | |
1813 | ||
1814 | if (last_entry) { | |
1815 | /* its the last one, mark for roaming. */ | |
acd34afa | 1816 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1817 | tt_global_entry->roam_at = jiffies; |
1818 | } else | |
1819 | /* there is another entry, we can simply delete this | |
1820 | * one and can still use the other one. | |
1821 | */ | |
1d8ab8d3 LL |
1822 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1823 | orig_node, message); | |
db08e6e5 SW |
1824 | } |
1825 | ||
c018ad3d AQ |
1826 | /** |
1827 | * batadv_tt_global_del - remove a client from the global table | |
1828 | * @bat_priv: the bat priv with all the soft interface information | |
1829 | * @orig_node: an originator serving this client | |
1830 | * @addr: the mac address of the client | |
1831 | * @vid: VLAN identifier | |
1832 | * @message: a message explaining the reason for deleting the client to print | |
1833 | * for debugging purpose | |
1834 | * @roaming: true if the deletion has been triggered by a roaming event | |
1835 | */ | |
56303d34 SE |
1836 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1837 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1838 | const unsigned char *addr, unsigned short vid, |
a513088d | 1839 | const char *message, bool roaming) |
a73105b8 | 1840 | { |
170173bf | 1841 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1842 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1843 | |
c018ad3d | 1844 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1845 | if (!tt_global_entry) |
7683fdc1 | 1846 | goto out; |
a73105b8 | 1847 | |
db08e6e5 | 1848 | if (!roaming) { |
1d8ab8d3 LL |
1849 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1850 | orig_node, message); | |
db08e6e5 SW |
1851 | |
1852 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1853 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1854 | message); | |
db08e6e5 SW |
1855 | |
1856 | goto out; | |
1857 | } | |
92f90f56 SE |
1858 | |
1859 | /* if we are deleting a global entry due to a roam | |
1860 | * event, there are two possibilities: | |
db08e6e5 SW |
1861 | * 1) the client roamed from node A to node B => if there |
1862 | * is only one originator left for this client, we mark | |
acd34afa | 1863 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1864 | * wait for node B to claim it. In case of timeout |
1865 | * the entry is purged. | |
db08e6e5 SW |
1866 | * |
1867 | * If there are other originators left, we directly delete | |
1868 | * the originator. | |
92f90f56 | 1869 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1870 | * the global entry, since it is useless now. |
1871 | */ | |
a513088d | 1872 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1873 | tt_global_entry->common.addr, |
1874 | vid); | |
a513088d | 1875 | if (local_entry) { |
db08e6e5 | 1876 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1877 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1878 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1879 | } else |
1880 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1881 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1882 | orig_node, message); | |
92f90f56 | 1883 | |
cc47f66e | 1884 | out: |
7683fdc1 | 1885 | if (tt_global_entry) |
5dafd8a6 | 1886 | batadv_tt_global_entry_put(tt_global_entry); |
a513088d | 1887 | if (local_entry) |
95c0db90 | 1888 | batadv_tt_local_entry_put(local_entry); |
a73105b8 AQ |
1889 | } |
1890 | ||
95fb130d AQ |
1891 | /** |
1892 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1893 | * given originator matching the provided vid | |
1894 | * @bat_priv: the bat priv with all the soft interface information | |
1895 | * @orig_node: the originator owning the entries to remove | |
1896 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1897 | * removed | |
1898 | * @message: debug message to print as "reason" | |
1899 | */ | |
56303d34 SE |
1900 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1901 | struct batadv_orig_node *orig_node, | |
6b5e971a | 1902 | s32 match_vid, |
56303d34 | 1903 | const char *message) |
c6c8fea2 | 1904 | { |
56303d34 SE |
1905 | struct batadv_tt_global_entry *tt_global; |
1906 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 1907 | u32 i; |
807736f6 | 1908 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1909 | struct hlist_node *safe; |
a73105b8 | 1910 | struct hlist_head *head; |
7683fdc1 | 1911 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1912 | unsigned short vid; |
c6c8fea2 | 1913 | |
6e801494 SW |
1914 | if (!hash) |
1915 | return; | |
1916 | ||
a73105b8 AQ |
1917 | for (i = 0; i < hash->size; i++) { |
1918 | head = &hash->table[i]; | |
7683fdc1 | 1919 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1920 | |
7683fdc1 | 1921 | spin_lock_bh(list_lock); |
b67bfe0d | 1922 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1923 | head, hash_entry) { |
95fb130d AQ |
1924 | /* remove only matching entries */ |
1925 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1926 | continue; | |
1927 | ||
56303d34 SE |
1928 | tt_global = container_of(tt_common_entry, |
1929 | struct batadv_tt_global_entry, | |
1930 | common); | |
db08e6e5 | 1931 | |
1d8ab8d3 LL |
1932 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1933 | orig_node, message); | |
db08e6e5 | 1934 | |
56303d34 | 1935 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1936 | vid = tt_global->common.vid; |
39c75a51 | 1937 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1938 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1939 | tt_global->common.addr, | |
1940 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1941 | hlist_del_rcu(&tt_common_entry->hash_entry); |
5dafd8a6 | 1942 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 | 1943 | } |
a73105b8 | 1944 | } |
7683fdc1 | 1945 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1946 | } |
ac4eebd4 | 1947 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
1948 | } |
1949 | ||
30cfd02b AQ |
1950 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1951 | char **msg) | |
cc47f66e | 1952 | { |
30cfd02b AQ |
1953 | bool purge = false; |
1954 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1955 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1956 | |
30cfd02b AQ |
1957 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1958 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1959 | purge = true; | |
1960 | *msg = "Roaming timeout\n"; | |
1961 | } | |
42d0b044 | 1962 | |
30cfd02b AQ |
1963 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1964 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1965 | purge = true; | |
1966 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1967 | } |
30cfd02b AQ |
1968 | |
1969 | return purge; | |
42d0b044 SE |
1970 | } |
1971 | ||
30cfd02b | 1972 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1973 | { |
807736f6 | 1974 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1975 | struct hlist_head *head; |
b67bfe0d | 1976 | struct hlist_node *node_tmp; |
7683fdc1 | 1977 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1978 | u32 i; |
30cfd02b AQ |
1979 | char *msg = NULL; |
1980 | struct batadv_tt_common_entry *tt_common; | |
1981 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1982 | |
cc47f66e AQ |
1983 | for (i = 0; i < hash->size; i++) { |
1984 | head = &hash->table[i]; | |
7683fdc1 | 1985 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1986 | |
7683fdc1 | 1987 | spin_lock_bh(list_lock); |
b67bfe0d | 1988 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1989 | hash_entry) { |
1990 | tt_global = container_of(tt_common, | |
1991 | struct batadv_tt_global_entry, | |
1992 | common); | |
1993 | ||
1994 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1995 | continue; | |
1996 | ||
1997 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1998 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1999 | tt_global->common.addr, | |
2000 | BATADV_PRINT_VID(tt_global->common.vid), | |
2001 | msg); | |
30cfd02b | 2002 | |
b67bfe0d | 2003 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b | 2004 | |
5dafd8a6 | 2005 | batadv_tt_global_entry_put(tt_global); |
30cfd02b | 2006 | } |
7683fdc1 | 2007 | spin_unlock_bh(list_lock); |
cc47f66e | 2008 | } |
cc47f66e AQ |
2009 | } |
2010 | ||
56303d34 | 2011 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 2012 | { |
5bf74e9c | 2013 | struct batadv_hashtable *hash; |
7683fdc1 | 2014 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
2015 | struct batadv_tt_common_entry *tt_common_entry; |
2016 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 2017 | struct hlist_node *node_tmp; |
7683fdc1 | 2018 | struct hlist_head *head; |
6b5e971a | 2019 | u32 i; |
7683fdc1 | 2020 | |
807736f6 | 2021 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
2022 | return; |
2023 | ||
807736f6 | 2024 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
2025 | |
2026 | for (i = 0; i < hash->size; i++) { | |
2027 | head = &hash->table[i]; | |
2028 | list_lock = &hash->list_locks[i]; | |
2029 | ||
2030 | spin_lock_bh(list_lock); | |
b67bfe0d | 2031 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 2032 | head, hash_entry) { |
b67bfe0d | 2033 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
2034 | tt_global = container_of(tt_common_entry, |
2035 | struct batadv_tt_global_entry, | |
2036 | common); | |
5dafd8a6 | 2037 | batadv_tt_global_entry_put(tt_global); |
7683fdc1 AQ |
2038 | } |
2039 | spin_unlock_bh(list_lock); | |
2040 | } | |
2041 | ||
1a8eaf07 | 2042 | batadv_hash_destroy(hash); |
7683fdc1 | 2043 | |
807736f6 | 2044 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2045 | } |
2046 | ||
56303d34 SE |
2047 | static bool |
2048 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2049 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
2050 | { |
2051 | bool ret = false; | |
2052 | ||
acd34afa SE |
2053 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2054 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
2055 | ret = true; |
2056 | ||
2d2fcc2a AQ |
2057 | /* check if the two clients are marked as isolated */ |
2058 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2059 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
2060 | ret = true; | |
2061 | ||
59b699cd AQ |
2062 | return ret; |
2063 | } | |
2064 | ||
c018ad3d AQ |
2065 | /** |
2066 | * batadv_transtable_search - get the mesh destination for a given client | |
2067 | * @bat_priv: the bat priv with all the soft interface information | |
2068 | * @src: mac address of the source client | |
2069 | * @addr: mac address of the destination client | |
2070 | * @vid: VLAN identifier | |
2071 | * | |
62fe710f | 2072 | * Return: a pointer to the originator that was selected as destination in the |
c018ad3d AQ |
2073 | * mesh for contacting the client 'addr', NULL otherwise. |
2074 | * In case of multiple originators serving the same client, the function returns | |
2075 | * the best one (best in terms of metric towards the destination node). | |
2076 | * | |
2077 | * If the two clients are AP isolated the function returns NULL. | |
2078 | */ | |
56303d34 | 2079 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2080 | const u8 *src, |
2081 | const u8 *addr, | |
c018ad3d | 2082 | unsigned short vid) |
c6c8fea2 | 2083 | { |
56303d34 SE |
2084 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2085 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2086 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2087 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2088 | |
eceb22ae | 2089 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2090 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2091 | if (!tt_local_entry || |
2092 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2093 | goto out; |
2094 | } | |
7aadf889 | 2095 | |
c018ad3d | 2096 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2097 | if (!tt_global_entry) |
7b36e8ee | 2098 | goto out; |
7aadf889 | 2099 | |
3d393e47 | 2100 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2101 | * isolation |
2102 | */ | |
a513088d SE |
2103 | if (tt_local_entry && |
2104 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2105 | goto out; |
2106 | ||
db08e6e5 | 2107 | rcu_read_lock(); |
4627456a | 2108 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2109 | /* found anything? */ |
981d8900 SE |
2110 | if (best_entry) |
2111 | orig_node = best_entry->orig_node; | |
7c124391 | 2112 | if (orig_node && !kref_get_unless_zero(&orig_node->refcount)) |
db08e6e5 SW |
2113 | orig_node = NULL; |
2114 | rcu_read_unlock(); | |
981d8900 | 2115 | |
7b36e8ee | 2116 | out: |
3d393e47 | 2117 | if (tt_global_entry) |
5dafd8a6 | 2118 | batadv_tt_global_entry_put(tt_global_entry); |
3d393e47 | 2119 | if (tt_local_entry) |
95c0db90 | 2120 | batadv_tt_local_entry_put(tt_local_entry); |
3d393e47 | 2121 | |
7b36e8ee | 2122 | return orig_node; |
c6c8fea2 | 2123 | } |
a73105b8 | 2124 | |
ced72933 AQ |
2125 | /** |
2126 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2127 | * to the given orig_node | |
2128 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2129 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2130 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2131 | * |
2132 | * This function computes the checksum for the global table corresponding to a | |
2133 | * specific originator. In particular, the checksum is computed as follows: For | |
2134 | * each client connected to the originator the CRC32C of the MAC address and the | |
2135 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2136 | * together. | |
2137 | * | |
2138 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2139 | * produce a unique hash of the table, but since the order which is used to feed | |
2140 | * the CRC32C function affects the result and since every node in the network | |
2141 | * probably sorts the clients differently, the hash function cannot be directly | |
2142 | * computed over the entire table. Hence the CRC32C is used only on | |
2143 | * the single client entry, while all the results are then xor'ed together | |
2144 | * because the XOR operation can combine them all while trying to reduce the | |
2145 | * noise as much as possible. | |
2146 | * | |
62fe710f | 2147 | * Return: the checksum of the global table of a given originator. |
ced72933 | 2148 | */ |
6b5e971a SE |
2149 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2150 | struct batadv_orig_node *orig_node, | |
2151 | unsigned short vid) | |
a73105b8 | 2152 | { |
807736f6 | 2153 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2154 | struct batadv_tt_common_entry *tt_common; |
2155 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2156 | struct hlist_head *head; |
6b5e971a SE |
2157 | u32 i, crc_tmp, crc = 0; |
2158 | u8 flags; | |
a30e22ca | 2159 | __be16 tmp_vid; |
a73105b8 AQ |
2160 | |
2161 | for (i = 0; i < hash->size; i++) { | |
2162 | head = &hash->table[i]; | |
2163 | ||
2164 | rcu_read_lock(); | |
b67bfe0d | 2165 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2166 | tt_global = container_of(tt_common, |
2167 | struct batadv_tt_global_entry, | |
2168 | common); | |
7ea7b4a1 AQ |
2169 | /* compute the CRC only for entries belonging to the |
2170 | * VLAN identified by the vid passed as parameter | |
2171 | */ | |
2172 | if (tt_common->vid != vid) | |
2173 | continue; | |
2174 | ||
db08e6e5 SW |
2175 | /* Roaming clients are in the global table for |
2176 | * consistency only. They don't have to be | |
2177 | * taken into account while computing the | |
2178 | * global crc | |
2179 | */ | |
acd34afa | 2180 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2181 | continue; |
30cfd02b AQ |
2182 | /* Temporary clients have not been announced yet, so |
2183 | * they have to be skipped while computing the global | |
2184 | * crc | |
2185 | */ | |
2186 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2187 | continue; | |
db08e6e5 SW |
2188 | |
2189 | /* find out if this global entry is announced by this | |
2190 | * originator | |
2191 | */ | |
56303d34 | 2192 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2193 | orig_node)) |
db08e6e5 SW |
2194 | continue; |
2195 | ||
a30e22ca AQ |
2196 | /* use network order to read the VID: this ensures that |
2197 | * every node reads the bytes in the same order. | |
2198 | */ | |
2199 | tmp_vid = htons(tt_common->vid); | |
2200 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2201 | |
2202 | /* compute the CRC on flags that have to be kept in sync | |
2203 | * among nodes | |
2204 | */ | |
2205 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2206 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2207 | ||
0ffa9e8d | 2208 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2209 | } |
2210 | rcu_read_unlock(); | |
2211 | } | |
2212 | ||
ced72933 | 2213 | return crc; |
a73105b8 AQ |
2214 | } |
2215 | ||
ced72933 AQ |
2216 | /** |
2217 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2218 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2219 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2220 | * |
2221 | * For details about the computation, please refer to the documentation for | |
2222 | * batadv_tt_global_crc(). | |
2223 | * | |
62fe710f | 2224 | * Return: the checksum of the local table |
ced72933 | 2225 | */ |
6b5e971a SE |
2226 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2227 | unsigned short vid) | |
a73105b8 | 2228 | { |
807736f6 | 2229 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2230 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2231 | struct hlist_head *head; |
6b5e971a SE |
2232 | u32 i, crc_tmp, crc = 0; |
2233 | u8 flags; | |
a30e22ca | 2234 | __be16 tmp_vid; |
a73105b8 AQ |
2235 | |
2236 | for (i = 0; i < hash->size; i++) { | |
2237 | head = &hash->table[i]; | |
2238 | ||
2239 | rcu_read_lock(); | |
b67bfe0d | 2240 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2241 | /* compute the CRC only for entries belonging to the |
2242 | * VLAN identified by vid | |
2243 | */ | |
2244 | if (tt_common->vid != vid) | |
2245 | continue; | |
2246 | ||
058d0e26 | 2247 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2248 | * account while computing the CRC |
2249 | */ | |
acd34afa | 2250 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2251 | continue; |
ced72933 | 2252 | |
a30e22ca AQ |
2253 | /* use network order to read the VID: this ensures that |
2254 | * every node reads the bytes in the same order. | |
2255 | */ | |
2256 | tmp_vid = htons(tt_common->vid); | |
2257 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2258 | |
2259 | /* compute the CRC on flags that have to be kept in sync | |
2260 | * among nodes | |
2261 | */ | |
2262 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2263 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2264 | ||
0ffa9e8d | 2265 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2266 | } |
a73105b8 AQ |
2267 | rcu_read_unlock(); |
2268 | } | |
2269 | ||
ced72933 | 2270 | return crc; |
a73105b8 AQ |
2271 | } |
2272 | ||
56303d34 | 2273 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2274 | { |
7c26a53b ML |
2275 | struct batadv_tt_req_node *node; |
2276 | struct hlist_node *safe; | |
a73105b8 | 2277 | |
807736f6 | 2278 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2279 | |
7c26a53b ML |
2280 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2281 | hlist_del_init(&node->list); | |
a73105b8 AQ |
2282 | kfree(node); |
2283 | } | |
2284 | ||
807736f6 | 2285 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2286 | } |
2287 | ||
56303d34 SE |
2288 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2289 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2290 | const void *tt_buff, |
6b5e971a | 2291 | u16 tt_buff_len) |
a73105b8 | 2292 | { |
a73105b8 | 2293 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2294 | * last OGM (the OGM could carry no changes) |
2295 | */ | |
a73105b8 AQ |
2296 | spin_lock_bh(&orig_node->tt_buff_lock); |
2297 | if (tt_buff_len > 0) { | |
2298 | kfree(orig_node->tt_buff); | |
2299 | orig_node->tt_buff_len = 0; | |
2300 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2301 | if (orig_node->tt_buff) { | |
2302 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2303 | orig_node->tt_buff_len = tt_buff_len; | |
2304 | } | |
2305 | } | |
2306 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2307 | } | |
2308 | ||
56303d34 | 2309 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2310 | { |
7c26a53b ML |
2311 | struct batadv_tt_req_node *node; |
2312 | struct hlist_node *safe; | |
a73105b8 | 2313 | |
807736f6 | 2314 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2315 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2316 | if (batadv_has_timed_out(node->issued_at, |
2317 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2318 | hlist_del_init(&node->list); |
a73105b8 AQ |
2319 | kfree(node); |
2320 | } | |
2321 | } | |
807736f6 | 2322 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2323 | } |
2324 | ||
383b8636 ML |
2325 | /** |
2326 | * batadv_tt_req_node_new - search and possibly create a tt_req_node object | |
2327 | * @bat_priv: the bat priv with all the soft interface information | |
2328 | * @orig_node: orig node this request is being issued for | |
2329 | * | |
62fe710f | 2330 | * Return: the pointer to the new tt_req_node struct if no request |
383b8636 | 2331 | * has already been issued for this orig_node, NULL otherwise. |
9cfc7bd6 | 2332 | */ |
56303d34 | 2333 | static struct batadv_tt_req_node * |
383b8636 | 2334 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2335 | struct batadv_orig_node *orig_node) |
a73105b8 | 2336 | { |
56303d34 | 2337 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2338 | |
807736f6 | 2339 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2340 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2341 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2342 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2343 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2344 | goto unlock; |
2345 | } | |
2346 | ||
2347 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2348 | if (!tt_req_node) | |
2349 | goto unlock; | |
2350 | ||
8fdd0153 | 2351 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2352 | tt_req_node->issued_at = jiffies; |
2353 | ||
7c26a53b | 2354 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2355 | unlock: |
807736f6 | 2356 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2357 | return tt_req_node; |
2358 | } | |
2359 | ||
335fbe0f ML |
2360 | /** |
2361 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2362 | * @entry_ptr: to be checked local tt entry | |
2363 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2364 | * | |
62fe710f | 2365 | * Return: 1 if the entry is a valid, 0 otherwise. |
335fbe0f ML |
2366 | */ |
2367 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2368 | { |
56303d34 | 2369 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2370 | |
acd34afa | 2371 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2372 | return 0; |
2373 | return 1; | |
2374 | } | |
2375 | ||
a513088d SE |
2376 | static int batadv_tt_global_valid(const void *entry_ptr, |
2377 | const void *data_ptr) | |
a73105b8 | 2378 | { |
56303d34 SE |
2379 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2380 | const struct batadv_tt_global_entry *tt_global_entry; | |
2381 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2382 | |
30cfd02b AQ |
2383 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2384 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2385 | return 0; |
2386 | ||
56303d34 SE |
2387 | tt_global_entry = container_of(tt_common_entry, |
2388 | struct batadv_tt_global_entry, | |
48100bac AQ |
2389 | common); |
2390 | ||
a513088d | 2391 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2392 | } |
2393 | ||
335fbe0f | 2394 | /** |
7ea7b4a1 AQ |
2395 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2396 | * specified tt hash | |
335fbe0f ML |
2397 | * @bat_priv: the bat priv with all the soft interface information |
2398 | * @hash: hash table containing the tt entries | |
2399 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2400 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2401 | * @valid_cb: function to filter tt change entries |
2402 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2403 | */ |
7ea7b4a1 AQ |
2404 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2405 | struct batadv_hashtable *hash, | |
6b5e971a | 2406 | void *tvlv_buff, u16 tt_len, |
7ea7b4a1 AQ |
2407 | int (*valid_cb)(const void *, const void *), |
2408 | void *cb_data) | |
a73105b8 | 2409 | { |
56303d34 | 2410 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2411 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2412 | struct hlist_head *head; |
6b5e971a SE |
2413 | u16 tt_tot, tt_num_entries = 0; |
2414 | u32 i; | |
a73105b8 | 2415 | |
298e6e68 | 2416 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2417 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2418 | |
2419 | rcu_read_lock(); | |
2420 | for (i = 0; i < hash->size; i++) { | |
2421 | head = &hash->table[i]; | |
2422 | ||
b67bfe0d | 2423 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2424 | head, hash_entry) { |
335fbe0f | 2425 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2426 | break; |
2427 | ||
48100bac | 2428 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2429 | continue; |
2430 | ||
8fdd0153 | 2431 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2432 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2433 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2434 | memset(tt_change->reserved, 0, |
2435 | sizeof(tt_change->reserved)); | |
a73105b8 | 2436 | |
335fbe0f | 2437 | tt_num_entries++; |
a73105b8 AQ |
2438 | tt_change++; |
2439 | } | |
2440 | } | |
2441 | rcu_read_unlock(); | |
7ea7b4a1 | 2442 | } |
a73105b8 | 2443 | |
7ea7b4a1 AQ |
2444 | /** |
2445 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2446 | * @orig_node: originator for which the CRCs have to be checked | |
2447 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2448 | * @num_vlan: number of tvlv VLAN entries | |
7ea7b4a1 | 2449 | * |
62fe710f | 2450 | * Return: true if all the received CRCs match the locally stored ones, false |
7ea7b4a1 AQ |
2451 | * otherwise |
2452 | */ | |
2453 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2454 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2455 | u16 num_vlan) |
7ea7b4a1 AQ |
2456 | { |
2457 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2458 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 2459 | int i, orig_num_vlan; |
6b5e971a | 2460 | u32 crc; |
7ea7b4a1 AQ |
2461 | |
2462 | /* check if each received CRC matches the locally stored one */ | |
2463 | for (i = 0; i < num_vlan; i++) { | |
2464 | tt_vlan_tmp = tt_vlan + i; | |
2465 | ||
2466 | /* if orig_node is a backbone node for this VLAN, don't check | |
2467 | * the CRC as we ignore all the global entries over it | |
2468 | */ | |
2469 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2470 | orig_node->orig, |
2471 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2472 | continue; |
2473 | ||
2474 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2475 | ntohs(tt_vlan_tmp->vid)); | |
2476 | if (!vlan) | |
2477 | return false; | |
2478 | ||
91c2b1a9 | 2479 | crc = vlan->tt.crc; |
21754e25 | 2480 | batadv_orig_node_vlan_put(vlan); |
91c2b1a9 AQ |
2481 | |
2482 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2483 | return false; |
2484 | } | |
2485 | ||
c169c59d SW |
2486 | /* check if any excess VLANs exist locally for the originator |
2487 | * which are not mentioned in the TVLV from the originator. | |
2488 | */ | |
2489 | rcu_read_lock(); | |
2490 | orig_num_vlan = 0; | |
2491 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
2492 | orig_num_vlan++; | |
2493 | rcu_read_unlock(); | |
2494 | ||
2495 | if (orig_num_vlan > num_vlan) | |
2496 | return false; | |
2497 | ||
7ea7b4a1 AQ |
2498 | return true; |
2499 | } | |
2500 | ||
2501 | /** | |
2502 | * batadv_tt_local_update_crc - update all the local CRCs | |
2503 | * @bat_priv: the bat priv with all the soft interface information | |
2504 | */ | |
2505 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2506 | { | |
2507 | struct batadv_softif_vlan *vlan; | |
2508 | ||
2509 | /* recompute the global CRC for each VLAN */ | |
2510 | rcu_read_lock(); | |
2511 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2512 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2513 | } | |
2514 | rcu_read_unlock(); | |
2515 | } | |
2516 | ||
2517 | /** | |
2518 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2519 | * @bat_priv: the bat priv with all the soft interface information | |
2520 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2521 | */ | |
2522 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2523 | struct batadv_orig_node *orig_node) | |
2524 | { | |
2525 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2526 | u32 crc; |
7ea7b4a1 AQ |
2527 | |
2528 | /* recompute the global CRC for each VLAN */ | |
2529 | rcu_read_lock(); | |
d0fa4f3f | 2530 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
2531 | /* if orig_node is a backbone node for this VLAN, don't compute |
2532 | * the CRC as we ignore all the global entries over it | |
2533 | */ | |
cfd4f757 AQ |
2534 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2535 | vlan->vid)) | |
7ea7b4a1 AQ |
2536 | continue; |
2537 | ||
2538 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2539 | vlan->tt.crc = crc; | |
2540 | } | |
2541 | rcu_read_unlock(); | |
a73105b8 AQ |
2542 | } |
2543 | ||
ced72933 AQ |
2544 | /** |
2545 | * batadv_send_tt_request - send a TT Request message to a given node | |
2546 | * @bat_priv: the bat priv with all the soft interface information | |
2547 | * @dst_orig_node: the destination of the message | |
2548 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2549 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2550 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2551 | * @full_table: ask for the entire translation table if true, while only for the |
2552 | * last TT diff otherwise | |
d15cd622 AQ |
2553 | * |
2554 | * Return: true if the TT Request was sent, false otherwise | |
ced72933 | 2555 | */ |
56303d34 SE |
2556 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2557 | struct batadv_orig_node *dst_orig_node, | |
6b5e971a | 2558 | u8 ttvn, |
7ea7b4a1 | 2559 | struct batadv_tvlv_tt_vlan_data *tt_vlan, |
6b5e971a | 2560 | u16 num_vlan, bool full_table) |
a73105b8 | 2561 | { |
335fbe0f | 2562 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2563 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2564 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2565 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2566 | bool ret = false; |
7ea7b4a1 | 2567 | int i, size; |
a73105b8 | 2568 | |
e5d89254 | 2569 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2570 | if (!primary_if) |
2571 | goto out; | |
2572 | ||
2573 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2574 | * reply from the same orig_node yet |
2575 | */ | |
383b8636 | 2576 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
2577 | if (!tt_req_node) |
2578 | goto out; | |
2579 | ||
7ea7b4a1 AQ |
2580 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2581 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2582 | if (!tvlv_tt_data) |
a73105b8 AQ |
2583 | goto out; |
2584 | ||
335fbe0f ML |
2585 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2586 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2587 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2588 | ||
2589 | /* send all the CRCs within the request. This is needed by intermediate | |
2590 | * nodes to ensure they have the correct table before replying | |
2591 | */ | |
2592 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2593 | for (i = 0; i < num_vlan; i++) { | |
2594 | tt_vlan_req->vid = tt_vlan->vid; | |
2595 | tt_vlan_req->crc = tt_vlan->crc; | |
2596 | ||
2597 | tt_vlan_req++; | |
2598 | tt_vlan++; | |
2599 | } | |
a73105b8 AQ |
2600 | |
2601 | if (full_table) | |
335fbe0f | 2602 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2603 | |
bb351ba0 | 2604 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2605 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2606 | |
d69909d2 | 2607 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2608 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2609 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2610 | tvlv_tt_data, size); |
335fbe0f | 2611 | ret = true; |
a73105b8 AQ |
2612 | |
2613 | out: | |
a73105b8 | 2614 | if (primary_if) |
82047ad7 | 2615 | batadv_hardif_put(primary_if); |
a73105b8 | 2616 | if (ret && tt_req_node) { |
807736f6 | 2617 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b ML |
2618 | /* hlist_del_init() verifies tt_req_node still is in the list */ |
2619 | hlist_del_init(&tt_req_node->list); | |
807736f6 | 2620 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2621 | kfree(tt_req_node); |
2622 | } | |
335fbe0f | 2623 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2624 | return ret; |
2625 | } | |
2626 | ||
335fbe0f ML |
2627 | /** |
2628 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2629 | * node's translation table | |
2630 | * @bat_priv: the bat priv with all the soft interface information | |
2631 | * @tt_data: tt data containing the tt request information | |
2632 | * @req_src: mac address of tt request sender | |
2633 | * @req_dst: mac address of tt request recipient | |
2634 | * | |
62fe710f | 2635 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2636 | */ |
2637 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2638 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2639 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2640 | { |
170173bf | 2641 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2642 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2643 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2644 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2645 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2646 | bool ret = false, full_table; |
6b5e971a SE |
2647 | u8 orig_ttvn, req_ttvn; |
2648 | u16 tvlv_len; | |
2649 | s32 tt_len; | |
a73105b8 | 2650 | |
39c75a51 | 2651 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2652 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 2653 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 2654 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
2655 | |
2656 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2657 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2658 | if (!req_dst_orig_node) |
2659 | goto out; | |
2660 | ||
335fbe0f | 2661 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2662 | if (!res_dst_orig_node) |
2663 | goto out; | |
2664 | ||
6b5e971a | 2665 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2666 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2667 | |
7ea7b4a1 | 2668 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2669 | /* this node doesn't have the requested data */ |
a73105b8 | 2670 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2671 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2672 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2673 | goto out; |
2674 | ||
015758d0 | 2675 | /* If the full table has been explicitly requested */ |
335fbe0f | 2676 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2677 | !req_dst_orig_node->tt_buff) |
2678 | full_table = true; | |
2679 | else | |
2680 | full_table = false; | |
2681 | ||
335fbe0f ML |
2682 | /* TT fragmentation hasn't been implemented yet, so send as many |
2683 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2684 | */ |
a73105b8 AQ |
2685 | if (!full_table) { |
2686 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2687 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2688 | |
7ea7b4a1 AQ |
2689 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2690 | &tvlv_tt_data, | |
2691 | &tt_change, | |
2692 | &tt_len); | |
2693 | if (!tt_len) | |
a73105b8 AQ |
2694 | goto unlock; |
2695 | ||
a73105b8 | 2696 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2697 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2698 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2699 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2700 | } else { | |
7ea7b4a1 AQ |
2701 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2702 | * in the initial part | |
2703 | */ | |
2704 | tt_len = -1; | |
2705 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2706 | &tvlv_tt_data, | |
2707 | &tt_change, | |
2708 | &tt_len); | |
2709 | if (!tt_len) | |
a73105b8 | 2710 | goto out; |
7ea7b4a1 AQ |
2711 | |
2712 | /* fill the rest of the tvlv with the real TT entries */ | |
2713 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2714 | tt_change, tt_len, | |
2715 | batadv_tt_global_valid, | |
2716 | req_dst_orig_node); | |
a73105b8 AQ |
2717 | } |
2718 | ||
a19d3d85 ML |
2719 | /* Don't send the response, if larger than fragmented packet. */ |
2720 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2721 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2722 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2723 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2724 | res_dst_orig_node->orig); | |
2725 | goto out; | |
2726 | } | |
2727 | ||
335fbe0f ML |
2728 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2729 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2730 | |
2731 | if (full_table) | |
335fbe0f | 2732 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2733 | |
39c75a51 | 2734 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2735 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2736 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2737 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2738 | |
d69909d2 | 2739 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2740 | |
335fbe0f | 2741 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2742 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2743 | tvlv_len); | |
e91ecfc6 | 2744 | |
335fbe0f | 2745 | ret = true; |
a73105b8 AQ |
2746 | goto out; |
2747 | ||
2748 | unlock: | |
2749 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2750 | ||
2751 | out: | |
2752 | if (res_dst_orig_node) | |
5d967310 | 2753 | batadv_orig_node_put(res_dst_orig_node); |
a73105b8 | 2754 | if (req_dst_orig_node) |
5d967310 | 2755 | batadv_orig_node_put(req_dst_orig_node); |
335fbe0f | 2756 | kfree(tvlv_tt_data); |
a73105b8 | 2757 | return ret; |
a73105b8 | 2758 | } |
96412690 | 2759 | |
335fbe0f ML |
2760 | /** |
2761 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2762 | * translation table | |
2763 | * @bat_priv: the bat priv with all the soft interface information | |
2764 | * @tt_data: tt data containing the tt request information | |
2765 | * @req_src: mac address of tt request sender | |
2766 | * | |
62fe710f | 2767 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2768 | */ |
2769 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2770 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2771 | u8 *req_src) |
a73105b8 | 2772 | { |
335fbe0f | 2773 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2774 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2775 | struct batadv_tvlv_tt_change *tt_change; |
2776 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
2777 | u8 my_ttvn, req_ttvn; |
2778 | u16 tvlv_len; | |
a73105b8 | 2779 | bool full_table; |
6b5e971a | 2780 | s32 tt_len; |
a73105b8 | 2781 | |
39c75a51 | 2782 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2783 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 2784 | req_src, tt_data->ttvn, |
a2f2b6cd | 2785 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2786 | |
a70a9aa9 | 2787 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2788 | |
6b5e971a | 2789 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2790 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2791 | |
335fbe0f | 2792 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2793 | if (!orig_node) |
2794 | goto out; | |
2795 | ||
e5d89254 | 2796 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2797 | if (!primary_if) |
2798 | goto out; | |
2799 | ||
2800 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2801 | * is too big send the whole local translation table |
2802 | */ | |
335fbe0f | 2803 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2804 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2805 | full_table = true; |
2806 | else | |
2807 | full_table = false; | |
2808 | ||
335fbe0f ML |
2809 | /* TT fragmentation hasn't been implemented yet, so send as many |
2810 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2811 | */ |
a73105b8 | 2812 | if (!full_table) { |
807736f6 | 2813 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2814 | |
7ea7b4a1 AQ |
2815 | tt_len = bat_priv->tt.last_changeset_len; |
2816 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2817 | &tvlv_tt_data, | |
2818 | &tt_change, | |
2819 | &tt_len); | |
2820 | if (!tt_len) | |
a73105b8 AQ |
2821 | goto unlock; |
2822 | ||
335fbe0f | 2823 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2824 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2825 | bat_priv->tt.last_changeset_len); |
2826 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2827 | } else { |
6b5e971a | 2828 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2829 | |
7ea7b4a1 AQ |
2830 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2831 | * in the initial part | |
2832 | */ | |
2833 | tt_len = -1; | |
2834 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2835 | &tvlv_tt_data, | |
2836 | &tt_change, | |
2837 | &tt_len); | |
2838 | if (!tt_len) | |
a73105b8 | 2839 | goto out; |
7ea7b4a1 AQ |
2840 | |
2841 | /* fill the rest of the tvlv with the real TT entries */ | |
2842 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2843 | tt_change, tt_len, | |
2844 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2845 | } |
2846 | ||
335fbe0f ML |
2847 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2848 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2849 | |
2850 | if (full_table) | |
335fbe0f | 2851 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2852 | |
39c75a51 | 2853 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2854 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2855 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2856 | |
d69909d2 | 2857 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2858 | |
335fbe0f | 2859 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2860 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2861 | tvlv_len); | |
335fbe0f | 2862 | |
a73105b8 AQ |
2863 | goto out; |
2864 | ||
2865 | unlock: | |
807736f6 | 2866 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2867 | out: |
a70a9aa9 | 2868 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2869 | if (orig_node) |
5d967310 | 2870 | batadv_orig_node_put(orig_node); |
a73105b8 | 2871 | if (primary_if) |
82047ad7 | 2872 | batadv_hardif_put(primary_if); |
335fbe0f ML |
2873 | kfree(tvlv_tt_data); |
2874 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2875 | return true; |
2876 | } | |
2877 | ||
335fbe0f ML |
2878 | /** |
2879 | * batadv_send_tt_response - send reply to tt request | |
2880 | * @bat_priv: the bat priv with all the soft interface information | |
2881 | * @tt_data: tt data containing the tt request information | |
2882 | * @req_src: mac address of tt request sender | |
2883 | * @req_dst: mac address of tt request recipient | |
2884 | * | |
62fe710f | 2885 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2886 | */ |
2887 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2888 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2889 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2890 | { |
cfd4f757 | 2891 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2892 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
2893 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
2894 | req_dst); | |
a73105b8 AQ |
2895 | } |
2896 | ||
56303d34 SE |
2897 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2898 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2899 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 2900 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
2901 | { |
2902 | int i; | |
a513088d | 2903 | int roams; |
a73105b8 AQ |
2904 | |
2905 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2906 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2907 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2908 | batadv_tt_global_del(bat_priv, orig_node, |
2909 | (tt_change + i)->addr, | |
c018ad3d | 2910 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2911 | "tt removed by changes", |
2912 | roams); | |
08c36d3e | 2913 | } else { |
08c36d3e | 2914 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2915 | (tt_change + i)->addr, |
c018ad3d | 2916 | ntohs((tt_change + i)->vid), |
d4f44692 | 2917 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2918 | /* In case of problem while storing a |
2919 | * global_entry, we stop the updating | |
2920 | * procedure without committing the | |
2921 | * ttvn change. This will avoid to send | |
2922 | * corrupted data on tt_request | |
2923 | */ | |
2924 | return; | |
08c36d3e | 2925 | } |
a73105b8 | 2926 | } |
ac4eebd4 | 2927 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
2928 | } |
2929 | ||
56303d34 | 2930 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 2931 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
2932 | u8 ttvn, u8 *resp_src, |
2933 | u16 num_entries) | |
a73105b8 | 2934 | { |
170173bf | 2935 | struct batadv_orig_node *orig_node; |
a73105b8 | 2936 | |
335fbe0f | 2937 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2938 | if (!orig_node) |
2939 | goto out; | |
2940 | ||
2941 | /* Purge the old table first.. */ | |
95fb130d AQ |
2942 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2943 | "Received full table"); | |
a73105b8 | 2944 | |
7ea7b4a1 AQ |
2945 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2946 | ttvn); | |
a73105b8 AQ |
2947 | |
2948 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2949 | kfree(orig_node->tt_buff); | |
2950 | orig_node->tt_buff_len = 0; | |
2951 | orig_node->tt_buff = NULL; | |
2952 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2953 | ||
7ea7b4a1 | 2954 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2955 | |
2956 | out: | |
2957 | if (orig_node) | |
5d967310 | 2958 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
2959 | } |
2960 | ||
56303d34 SE |
2961 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2962 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2963 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 2964 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2965 | { |
a513088d SE |
2966 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2967 | tt_num_changes, ttvn); | |
a73105b8 | 2968 | |
e8cf234a AQ |
2969 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2970 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2971 | atomic_set(&orig_node->last_ttvn, ttvn); |
2972 | } | |
2973 | ||
c018ad3d AQ |
2974 | /** |
2975 | * batadv_is_my_client - check if a client is served by the local node | |
2976 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 2977 | * @addr: the mac address of the client to check |
c018ad3d AQ |
2978 | * @vid: VLAN identifier |
2979 | * | |
62fe710f | 2980 | * Return: true if the client is served by this node, false otherwise. |
c018ad3d | 2981 | */ |
6b5e971a | 2982 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 2983 | unsigned short vid) |
a73105b8 | 2984 | { |
170173bf | 2985 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2986 | bool ret = false; |
a73105b8 | 2987 | |
c018ad3d | 2988 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2989 | if (!tt_local_entry) |
2990 | goto out; | |
058d0e26 | 2991 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2992 | * consistency purpose) |
2993 | */ | |
7c1fd91d AQ |
2994 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2995 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2996 | goto out; |
7683fdc1 AQ |
2997 | ret = true; |
2998 | out: | |
a73105b8 | 2999 | if (tt_local_entry) |
95c0db90 | 3000 | batadv_tt_local_entry_put(tt_local_entry); |
7683fdc1 | 3001 | return ret; |
a73105b8 AQ |
3002 | } |
3003 | ||
335fbe0f ML |
3004 | /** |
3005 | * batadv_handle_tt_response - process incoming tt reply | |
3006 | * @bat_priv: the bat priv with all the soft interface information | |
3007 | * @tt_data: tt data containing the tt request information | |
3008 | * @resp_src: mac address of tt reply sender | |
3009 | * @num_entries: number of tt change entries appended to the tt data | |
3010 | */ | |
3011 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
3012 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3013 | u8 *resp_src, u16 num_entries) |
a73105b8 | 3014 | { |
7c26a53b ML |
3015 | struct batadv_tt_req_node *node; |
3016 | struct hlist_node *safe; | |
56303d34 | 3017 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 3018 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
3019 | u8 *tvlv_ptr = (u8 *)tt_data; |
3020 | u16 change_offset; | |
a73105b8 | 3021 | |
39c75a51 | 3022 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3023 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 3024 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 3025 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3026 | |
335fbe0f | 3027 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3028 | if (!orig_node) |
3029 | goto out; | |
3030 | ||
a70a9aa9 AQ |
3031 | spin_lock_bh(&orig_node->tt_lock); |
3032 | ||
7ea7b4a1 AQ |
3033 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
3034 | change_offset *= ntohs(tt_data->num_vlan); | |
3035 | change_offset += sizeof(*tt_data); | |
3036 | tvlv_ptr += change_offset; | |
3037 | ||
3038 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 3039 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
3040 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3041 | resp_src, num_entries); | |
96412690 | 3042 | } else { |
335fbe0f ML |
3043 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3044 | tt_data->ttvn, tt_change); | |
96412690 | 3045 | } |
a73105b8 | 3046 | |
a70a9aa9 | 3047 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3048 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3049 | |
3050 | spin_unlock_bh(&orig_node->tt_lock); | |
3051 | ||
a73105b8 | 3052 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3053 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3054 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3055 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3056 | continue; |
7c26a53b | 3057 | hlist_del_init(&node->list); |
a73105b8 AQ |
3058 | kfree(node); |
3059 | } | |
7ea7b4a1 | 3060 | |
807736f6 | 3061 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3062 | out: |
3063 | if (orig_node) | |
5d967310 | 3064 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3065 | } |
3066 | ||
56303d34 | 3067 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3068 | { |
56303d34 | 3069 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3070 | |
807736f6 | 3071 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3072 | |
807736f6 | 3073 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
3074 | list_del(&node->list); |
3075 | kfree(node); | |
3076 | } | |
3077 | ||
807736f6 | 3078 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3079 | } |
3080 | ||
56303d34 | 3081 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3082 | { |
56303d34 | 3083 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3084 | |
807736f6 SE |
3085 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3086 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3087 | if (!batadv_has_timed_out(node->first_time, |
3088 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3089 | continue; |
3090 | ||
3091 | list_del(&node->list); | |
3092 | kfree(node); | |
3093 | } | |
807736f6 | 3094 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3095 | } |
3096 | ||
62fe710f | 3097 | /** |
d15cd622 AQ |
3098 | * batadv_tt_check_roam_count - check if a client has roamed too frequently |
3099 | * @bat_priv: the bat priv with all the soft interface information | |
3100 | * @client: mac address of the roaming client | |
62fe710f SE |
3101 | * |
3102 | * This function checks whether the client already reached the | |
cc47f66e AQ |
3103 | * maximum number of possible roaming phases. In this case the ROAMING_ADV |
3104 | * will not be sent. | |
3105 | * | |
62fe710f | 3106 | * Return: true if the ROAMING_ADV can be sent, false otherwise |
9cfc7bd6 | 3107 | */ |
6b5e971a | 3108 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3109 | { |
56303d34 | 3110 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3111 | bool ret = false; |
3112 | ||
807736f6 | 3113 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3114 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3115 | * reply from the same orig_node yet |
3116 | */ | |
807736f6 | 3117 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3118 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3119 | continue; |
3120 | ||
1eda58bf | 3121 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3122 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3123 | continue; |
3124 | ||
3e34819e | 3125 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3126 | /* Sorry, you roamed too many times! */ |
3127 | goto unlock; | |
3128 | ret = true; | |
3129 | break; | |
3130 | } | |
3131 | ||
3132 | if (!ret) { | |
3133 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
3134 | if (!tt_roam_node) | |
3135 | goto unlock; | |
3136 | ||
3137 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3138 | atomic_set(&tt_roam_node->counter, |
3139 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3140 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3141 | |
807736f6 | 3142 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3143 | ret = true; |
3144 | } | |
3145 | ||
3146 | unlock: | |
807736f6 | 3147 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3148 | return ret; |
3149 | } | |
3150 | ||
c018ad3d AQ |
3151 | /** |
3152 | * batadv_send_roam_adv - send a roaming advertisement message | |
3153 | * @bat_priv: the bat priv with all the soft interface information | |
3154 | * @client: mac address of the roaming client | |
3155 | * @vid: VLAN identifier | |
3156 | * @orig_node: message destination | |
3157 | * | |
3158 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3159 | * client. This is done to inform the node that from now on all traffic destined | |
3160 | * for this particular roamed client has to be forwarded to the sender of the | |
3161 | * roaming message. | |
3162 | */ | |
6b5e971a | 3163 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3164 | unsigned short vid, |
56303d34 | 3165 | struct batadv_orig_node *orig_node) |
cc47f66e | 3166 | { |
56303d34 | 3167 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3168 | struct batadv_tvlv_roam_adv tvlv_roam; |
3169 | ||
3170 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3171 | if (!primary_if) | |
3172 | goto out; | |
cc47f66e AQ |
3173 | |
3174 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3175 | * already roamed to us too many times |
3176 | */ | |
a513088d | 3177 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3178 | goto out; |
3179 | ||
39c75a51 | 3180 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3181 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3182 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3183 | |
d69909d2 | 3184 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3185 | |
122edaa0 | 3186 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3187 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3188 | |
3189 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3190 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3191 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3192 | |
3193 | out: | |
122edaa0 | 3194 | if (primary_if) |
82047ad7 | 3195 | batadv_hardif_put(primary_if); |
a73105b8 AQ |
3196 | } |
3197 | ||
a513088d | 3198 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3199 | { |
56303d34 | 3200 | struct delayed_work *delayed_work; |
807736f6 | 3201 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3202 | struct batadv_priv *bat_priv; |
3203 | ||
3204 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3205 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3206 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3207 | |
a19d3d85 | 3208 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3209 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3210 | batadv_tt_req_purge(bat_priv); |
3211 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3212 | |
72414442 AQ |
3213 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3214 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3215 | } |
cc47f66e | 3216 | |
56303d34 | 3217 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3218 | { |
e1bf0c14 ML |
3219 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3220 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3221 | ||
807736f6 | 3222 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3223 | |
a513088d SE |
3224 | batadv_tt_local_table_free(bat_priv); |
3225 | batadv_tt_global_table_free(bat_priv); | |
3226 | batadv_tt_req_list_free(bat_priv); | |
3227 | batadv_tt_changes_list_free(bat_priv); | |
3228 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3229 | |
807736f6 | 3230 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3231 | } |
058d0e26 | 3232 | |
7ea7b4a1 AQ |
3233 | /** |
3234 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3235 | * table and possibly count them in the TT size | |
3236 | * @bat_priv: the bat priv with all the soft interface information | |
3237 | * @flags: the flag to switch | |
3238 | * @enable: whether to set or unset the flag | |
3239 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3240 | */ |
6b5e971a SE |
3241 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3242 | bool enable, bool count) | |
058d0e26 | 3243 | { |
7ea7b4a1 AQ |
3244 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3245 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 3246 | u16 changed_num = 0; |
058d0e26 | 3247 | struct hlist_head *head; |
6b5e971a | 3248 | u32 i; |
058d0e26 AQ |
3249 | |
3250 | if (!hash) | |
7ea7b4a1 | 3251 | return; |
058d0e26 AQ |
3252 | |
3253 | for (i = 0; i < hash->size; i++) { | |
3254 | head = &hash->table[i]; | |
3255 | ||
3256 | rcu_read_lock(); | |
b67bfe0d | 3257 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3258 | head, hash_entry) { |
697f2531 AQ |
3259 | if (enable) { |
3260 | if ((tt_common_entry->flags & flags) == flags) | |
3261 | continue; | |
3262 | tt_common_entry->flags |= flags; | |
3263 | } else { | |
3264 | if (!(tt_common_entry->flags & flags)) | |
3265 | continue; | |
3266 | tt_common_entry->flags &= ~flags; | |
3267 | } | |
3268 | changed_num++; | |
7ea7b4a1 AQ |
3269 | |
3270 | if (!count) | |
3271 | continue; | |
3272 | ||
3273 | batadv_tt_local_size_inc(bat_priv, | |
3274 | tt_common_entry->vid); | |
058d0e26 AQ |
3275 | } |
3276 | rcu_read_unlock(); | |
3277 | } | |
058d0e26 AQ |
3278 | } |
3279 | ||
acd34afa | 3280 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3281 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3282 | { |
807736f6 | 3283 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3284 | struct batadv_tt_common_entry *tt_common; |
3285 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3286 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3287 | struct hlist_head *head; |
3288 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3289 | u32 i; |
058d0e26 AQ |
3290 | |
3291 | if (!hash) | |
3292 | return; | |
3293 | ||
3294 | for (i = 0; i < hash->size; i++) { | |
3295 | head = &hash->table[i]; | |
3296 | list_lock = &hash->list_locks[i]; | |
3297 | ||
3298 | spin_lock_bh(list_lock); | |
b67bfe0d | 3299 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3300 | hash_entry) { |
3301 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3302 | continue; |
3303 | ||
39c75a51 | 3304 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3305 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3306 | tt_common->addr, | |
3307 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3308 | |
7ea7b4a1 | 3309 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3310 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3311 | tt_local = container_of(tt_common, |
3312 | struct batadv_tt_local_entry, | |
3313 | common); | |
35df3b29 | 3314 | |
95c0db90 | 3315 | batadv_tt_local_entry_put(tt_local); |
058d0e26 AQ |
3316 | } |
3317 | spin_unlock_bh(list_lock); | |
3318 | } | |
058d0e26 AQ |
3319 | } |
3320 | ||
e1bf0c14 | 3321 | /** |
a19d3d85 ML |
3322 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3323 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3324 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3325 | * |
3326 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3327 | */ |
a19d3d85 | 3328 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3329 | { |
5274cd68 SE |
3330 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3331 | ||
c5caf4ef LL |
3332 | /* Update multicast addresses in local translation table */ |
3333 | batadv_mcast_mla_update(bat_priv); | |
3334 | ||
e1bf0c14 ML |
3335 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3336 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3337 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3338 | return; |
e1bf0c14 | 3339 | } |
be9aa4c1 | 3340 | |
7ea7b4a1 | 3341 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3342 | |
a513088d | 3343 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3344 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3345 | |
3346 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3347 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3348 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3349 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3350 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3351 | |
3352 | /* reset the sending counter */ | |
807736f6 | 3353 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3354 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3355 | } |
a70a9aa9 | 3356 | |
a19d3d85 ML |
3357 | /** |
3358 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3359 | * have been queued in the time since the last commit | |
3360 | * @bat_priv: the bat priv with all the soft interface information | |
3361 | */ | |
3362 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3363 | { | |
3364 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3365 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3366 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3367 | } |
59b699cd | 3368 | |
6b5e971a SE |
3369 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3370 | unsigned short vid) | |
59b699cd | 3371 | { |
56303d34 SE |
3372 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3373 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3374 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3375 | bool ret = false; |
59b699cd | 3376 | |
b8cbd81d | 3377 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3378 | if (!vlan) |
3379 | return false; | |
3380 | ||
3381 | if (!atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3382 | goto out; |
59b699cd | 3383 | |
b8cbd81d | 3384 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3385 | if (!tt_local_entry) |
3386 | goto out; | |
3387 | ||
b8cbd81d | 3388 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3389 | if (!tt_global_entry) |
3390 | goto out; | |
3391 | ||
1f129fef | 3392 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3393 | goto out; |
3394 | ||
5870adc6 | 3395 | ret = true; |
59b699cd AQ |
3396 | |
3397 | out: | |
9c3bf081 | 3398 | batadv_softif_vlan_put(vlan); |
59b699cd | 3399 | if (tt_global_entry) |
5dafd8a6 | 3400 | batadv_tt_global_entry_put(tt_global_entry); |
59b699cd | 3401 | if (tt_local_entry) |
95c0db90 | 3402 | batadv_tt_local_entry_put(tt_local_entry); |
59b699cd AQ |
3403 | return ret; |
3404 | } | |
a943cac1 | 3405 | |
e1bf0c14 ML |
3406 | /** |
3407 | * batadv_tt_update_orig - update global translation table with new tt | |
3408 | * information received via ogms | |
3409 | * @bat_priv: the bat priv with all the soft interface information | |
e51f0397 SE |
3410 | * @orig_node: the orig_node of the ogm |
3411 | * @tt_buff: pointer to the first tvlv VLAN entry | |
7ea7b4a1 AQ |
3412 | * @tt_num_vlan: number of tvlv VLAN entries |
3413 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3414 | * @tt_num_changes: number of tt changes inside the tt buffer |
3415 | * @ttvn: translation table version number of this changeset | |
e1bf0c14 ML |
3416 | */ |
3417 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3418 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3419 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3420 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3421 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3422 | { |
6b5e971a | 3423 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3424 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3425 | bool full_table = true; |
e17931d1 | 3426 | bool has_tt_init; |
a943cac1 | 3427 | |
7ea7b4a1 | 3428 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3429 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3430 | &orig_node->capa_initialized); | |
e17931d1 | 3431 | |
17071578 | 3432 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3433 | * increased by one -> we can apply the attached changes |
3434 | */ | |
e17931d1 | 3435 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3436 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3437 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3438 | * times. | |
9cfc7bd6 SE |
3439 | * In this case send a tt request |
3440 | */ | |
a943cac1 ML |
3441 | if (!tt_num_changes) { |
3442 | full_table = false; | |
3443 | goto request_table; | |
3444 | } | |
3445 | ||
a70a9aa9 AQ |
3446 | spin_lock_bh(&orig_node->tt_lock); |
3447 | ||
a513088d | 3448 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3449 | ttvn, tt_change); |
a943cac1 ML |
3450 | |
3451 | /* Even if we received the precomputed crc with the OGM, we | |
3452 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3453 | * in the global table |
3454 | */ | |
7ea7b4a1 | 3455 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3456 | |
a70a9aa9 AQ |
3457 | spin_unlock_bh(&orig_node->tt_lock); |
3458 | ||
a943cac1 ML |
3459 | /* The ttvn alone is not enough to guarantee consistency |
3460 | * because a single value could represent different states | |
3461 | * (due to the wrap around). Thus a node has to check whether | |
3462 | * the resulting table (after applying the changes) is still | |
3463 | * consistent or not. E.g. a node could disconnect while its | |
3464 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3465 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3466 | * inconsistency |
3467 | */ | |
7ea7b4a1 AQ |
3468 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3469 | tt_num_vlan)) | |
a943cac1 | 3470 | goto request_table; |
a943cac1 ML |
3471 | } else { |
3472 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3473 | * in sync anymore -> request fresh tt data |
3474 | */ | |
e17931d1 | 3475 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3476 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3477 | tt_num_vlan)) { | |
a943cac1 | 3478 | request_table: |
39c75a51 | 3479 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3480 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3481 | orig_node->orig, ttvn, orig_ttvn, | |
3482 | tt_num_changes); | |
a513088d | 3483 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3484 | tt_vlan, tt_num_vlan, |
3485 | full_table); | |
a943cac1 ML |
3486 | return; |
3487 | } | |
3488 | } | |
3489 | } | |
3275e7cc | 3490 | |
c018ad3d AQ |
3491 | /** |
3492 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3493 | * @bat_priv: the bat priv with all the soft interface information | |
3494 | * @addr: the mac address of the client to check | |
3495 | * @vid: VLAN identifier | |
3496 | * | |
62fe710f | 3497 | * Return: true if we know that the client has moved from its old originator |
c018ad3d AQ |
3498 | * to another one. This entry is still kept for consistency purposes and will be |
3499 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3500 | */ |
56303d34 | 3501 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 3502 | u8 *addr, unsigned short vid) |
3275e7cc | 3503 | { |
56303d34 | 3504 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3505 | bool ret = false; |
3506 | ||
c018ad3d | 3507 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3508 | if (!tt_global_entry) |
3509 | goto out; | |
3510 | ||
c1d07431 | 3511 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
5dafd8a6 | 3512 | batadv_tt_global_entry_put(tt_global_entry); |
3275e7cc AQ |
3513 | out: |
3514 | return ret; | |
3515 | } | |
30cfd02b | 3516 | |
7c1fd91d AQ |
3517 | /** |
3518 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3519 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3520 | * @addr: the mac address of the local client to query |
3521 | * @vid: VLAN identifier | |
7c1fd91d | 3522 | * |
62fe710f | 3523 | * Return: true if the local client is known to be roaming (it is not served by |
7c1fd91d AQ |
3524 | * this node anymore) or not. If yes, the client is still present in the table |
3525 | * to keep the latter consistent with the node TTVN | |
3526 | */ | |
3527 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 3528 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
3529 | { |
3530 | struct batadv_tt_local_entry *tt_local_entry; | |
3531 | bool ret = false; | |
3532 | ||
c018ad3d | 3533 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3534 | if (!tt_local_entry) |
3535 | goto out; | |
3536 | ||
3537 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
95c0db90 | 3538 | batadv_tt_local_entry_put(tt_local_entry); |
7c1fd91d AQ |
3539 | out: |
3540 | return ret; | |
7c1fd91d AQ |
3541 | } |
3542 | ||
30cfd02b AQ |
3543 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3544 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3545 | const unsigned char *addr, |
16052789 | 3546 | unsigned short vid) |
30cfd02b AQ |
3547 | { |
3548 | bool ret = false; | |
3549 | ||
16052789 | 3550 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3551 | BATADV_TT_CLIENT_TEMP, |
3552 | atomic_read(&orig_node->last_ttvn))) | |
3553 | goto out; | |
3554 | ||
3555 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3556 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3557 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3558 | ret = true; |
3559 | out: | |
3560 | return ret; | |
3561 | } | |
e1bf0c14 | 3562 | |
a19d3d85 ML |
3563 | /** |
3564 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3565 | * maximum packet size that can be transported through the mesh | |
3566 | * @soft_iface: netdev struct of the mesh interface | |
3567 | * | |
3568 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3569 | * to be removed. | |
3570 | */ | |
3571 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3572 | { | |
3573 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3574 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3575 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3576 | bool reduced = false; | |
3577 | ||
3578 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3579 | ||
3580 | while (true) { | |
3581 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3582 | if (packet_size_max >= table_size) | |
3583 | break; | |
3584 | ||
3585 | batadv_tt_local_purge(bat_priv, timeout); | |
3586 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3587 | ||
3588 | timeout /= 2; | |
3589 | reduced = true; | |
3590 | net_ratelimited_function(batadv_info, soft_iface, | |
3591 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3592 | packet_size_max); | |
3593 | } | |
3594 | ||
3595 | /* commit these changes immediately, to avoid synchronization problem | |
3596 | * with the TTVN | |
3597 | */ | |
3598 | if (reduced) | |
3599 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3600 | ||
3601 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3602 | } | |
3603 | ||
e1bf0c14 ML |
3604 | /** |
3605 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3606 | * @bat_priv: the bat priv with all the soft interface information | |
3607 | * @orig: the orig_node of the ogm | |
3608 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3609 | * @tvlv_value: tvlv buffer containing the gateway data | |
3610 | * @tvlv_value_len: tvlv buffer length | |
3611 | */ | |
3612 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3613 | struct batadv_orig_node *orig, | |
6b5e971a SE |
3614 | u8 flags, void *tvlv_value, |
3615 | u16 tvlv_value_len) | |
e1bf0c14 | 3616 | { |
7ea7b4a1 AQ |
3617 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3618 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3619 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 3620 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
3621 | |
3622 | if (tvlv_value_len < sizeof(*tt_data)) | |
3623 | return; | |
3624 | ||
3625 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3626 | tvlv_value_len -= sizeof(*tt_data); | |
3627 | ||
7ea7b4a1 AQ |
3628 | num_vlan = ntohs(tt_data->num_vlan); |
3629 | ||
3630 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3631 | return; | |
3632 | ||
3633 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3634 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3635 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3636 | ||
298e6e68 | 3637 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3638 | |
7ea7b4a1 AQ |
3639 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3640 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3641 | } |
3642 | ||
335fbe0f ML |
3643 | /** |
3644 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3645 | * container | |
3646 | * @bat_priv: the bat priv with all the soft interface information | |
3647 | * @src: mac address of tt tvlv sender | |
3648 | * @dst: mac address of tt tvlv recipient | |
3649 | * @tvlv_value: tvlv buffer containing the tt data | |
3650 | * @tvlv_value_len: tvlv buffer length | |
3651 | * | |
62fe710f | 3652 | * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS |
335fbe0f ML |
3653 | * otherwise. |
3654 | */ | |
3655 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3656 | u8 *src, u8 *dst, |
335fbe0f | 3657 | void *tvlv_value, |
6b5e971a | 3658 | u16 tvlv_value_len) |
335fbe0f ML |
3659 | { |
3660 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 3661 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3662 | char tt_flag; |
3663 | bool ret; | |
3664 | ||
3665 | if (tvlv_value_len < sizeof(*tt_data)) | |
3666 | return NET_RX_SUCCESS; | |
3667 | ||
3668 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3669 | tvlv_value_len -= sizeof(*tt_data); | |
3670 | ||
7ea7b4a1 AQ |
3671 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3672 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3673 | ||
3674 | if (tvlv_value_len < tt_vlan_len) | |
3675 | return NET_RX_SUCCESS; | |
3676 | ||
3677 | tvlv_value_len -= tt_vlan_len; | |
3678 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3679 | |
3680 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3681 | case BATADV_TT_REQUEST: | |
3682 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3683 | ||
3684 | /* If this node cannot provide a TT response the tt_request is | |
3685 | * forwarded | |
3686 | */ | |
3687 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3688 | if (!ret) { | |
3689 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3690 | tt_flag = 'F'; | |
3691 | else | |
3692 | tt_flag = '.'; | |
3693 | ||
3694 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3695 | "Routing TT_REQUEST to %pM [%c]\n", | |
3696 | dst, tt_flag); | |
3697 | /* tvlv API will re-route the packet */ | |
3698 | return NET_RX_DROP; | |
3699 | } | |
3700 | break; | |
3701 | case BATADV_TT_RESPONSE: | |
3702 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3703 | ||
3704 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3705 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3706 | src, tt_num_entries); |
335fbe0f ML |
3707 | return NET_RX_SUCCESS; |
3708 | } | |
3709 | ||
3710 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3711 | tt_flag = 'F'; | |
3712 | else | |
3713 | tt_flag = '.'; | |
3714 | ||
3715 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3716 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3717 | ||
3718 | /* tvlv API will re-route the packet */ | |
3719 | return NET_RX_DROP; | |
3720 | } | |
3721 | ||
3722 | return NET_RX_SUCCESS; | |
3723 | } | |
3724 | ||
122edaa0 ML |
3725 | /** |
3726 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3727 | * @bat_priv: the bat priv with all the soft interface information | |
3728 | * @src: mac address of tt tvlv sender | |
3729 | * @dst: mac address of tt tvlv recipient | |
3730 | * @tvlv_value: tvlv buffer containing the tt data | |
3731 | * @tvlv_value_len: tvlv buffer length | |
3732 | * | |
62fe710f | 3733 | * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS |
122edaa0 ML |
3734 | * otherwise. |
3735 | */ | |
3736 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3737 | u8 *src, u8 *dst, |
122edaa0 | 3738 | void *tvlv_value, |
6b5e971a | 3739 | u16 tvlv_value_len) |
122edaa0 ML |
3740 | { |
3741 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3742 | struct batadv_orig_node *orig_node = NULL; | |
3743 | ||
3744 | /* If this node is not the intended recipient of the | |
3745 | * roaming advertisement the packet is forwarded | |
3746 | * (the tvlv API will re-route the packet). | |
3747 | */ | |
3748 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3749 | return NET_RX_DROP; | |
3750 | ||
122edaa0 ML |
3751 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3752 | goto out; | |
3753 | ||
3754 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3755 | if (!orig_node) | |
3756 | goto out; | |
3757 | ||
3758 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3759 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3760 | ||
3761 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3762 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3763 | src, roaming_adv->client); | |
3764 | ||
3765 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3766 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3767 | atomic_read(&orig_node->last_ttvn) + 1); |
3768 | ||
3769 | out: | |
3770 | if (orig_node) | |
5d967310 | 3771 | batadv_orig_node_put(orig_node); |
122edaa0 ML |
3772 | return NET_RX_SUCCESS; |
3773 | } | |
3774 | ||
e1bf0c14 ML |
3775 | /** |
3776 | * batadv_tt_init - initialise the translation table internals | |
3777 | * @bat_priv: the bat priv with all the soft interface information | |
3778 | * | |
62fe710f | 3779 | * Return: 0 on success or negative error number in case of failure. |
e1bf0c14 ML |
3780 | */ |
3781 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3782 | { | |
3783 | int ret; | |
3784 | ||
0eb01568 AQ |
3785 | /* synchronized flags must be remote */ |
3786 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3787 | ||
e1bf0c14 ML |
3788 | ret = batadv_tt_local_init(bat_priv); |
3789 | if (ret < 0) | |
3790 | return ret; | |
3791 | ||
3792 | ret = batadv_tt_global_init(bat_priv); | |
3793 | if (ret < 0) | |
3794 | return ret; | |
3795 | ||
3796 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3797 | batadv_tt_tvlv_unicast_handler_v1, |
3798 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3799 | |
122edaa0 ML |
3800 | batadv_tvlv_handler_register(bat_priv, NULL, |
3801 | batadv_roam_tvlv_unicast_handler_v1, | |
3802 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3803 | ||
e1bf0c14 ML |
3804 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3805 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3806 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3807 | ||
3808 | return 1; | |
3809 | } | |
42cb0bef AQ |
3810 | |
3811 | /** | |
3812 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3813 | * @bat_priv: the bat priv with all the soft interface information | |
3814 | * @addr: the mac address of the client | |
3815 | * @vid: the identifier of the VLAN where this client is connected | |
3816 | * | |
62fe710f | 3817 | * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false |
42cb0bef AQ |
3818 | * otherwise |
3819 | */ | |
3820 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 3821 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
3822 | { |
3823 | struct batadv_tt_global_entry *tt; | |
3824 | bool ret; | |
3825 | ||
3826 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3827 | if (!tt) | |
3828 | return false; | |
3829 | ||
3830 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3831 | ||
5dafd8a6 | 3832 | batadv_tt_global_entry_put(tt); |
42cb0bef AQ |
3833 | |
3834 | return ret; | |
3835 | } |