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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 | ||
218 | kfree_rcu(tt_local_entry, common.rcu); | |
219 | } | |
220 | ||
221 | /** | |
222 | * batadv_tt_local_entry_free_ref - decrement the tt_local_entry refcounter and | |
223 | * possibly release it | |
224 | * @tt_local_entry: tt_local_entry to be free'd | |
225 | */ | |
a513088d | 226 | static void |
56303d34 | 227 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 228 | { |
92dcdf09 SE |
229 | kref_put(&tt_local_entry->common.refcount, |
230 | batadv_tt_local_entry_release); | |
7683fdc1 AQ |
231 | } |
232 | ||
21026059 | 233 | /** |
92dcdf09 SE |
234 | * batadv_tt_global_entry_release - release tt_global_entry from lists and queue |
235 | * for free after rcu grace period | |
236 | * @ref: kref pointer of the nc_node | |
237 | */ | |
238 | static void batadv_tt_global_entry_release(struct kref *ref) | |
239 | { | |
240 | struct batadv_tt_global_entry *tt_global_entry; | |
241 | ||
242 | tt_global_entry = container_of(ref, struct batadv_tt_global_entry, | |
243 | common.refcount); | |
244 | ||
245 | batadv_tt_global_del_orig_list(tt_global_entry); | |
246 | kfree_rcu(tt_global_entry, common.rcu); | |
247 | } | |
248 | ||
249 | /** | |
250 | * batadv_tt_global_entry_free_ref - decrement the tt_global_entry refcounter | |
251 | * and possibly release it | |
252 | * @tt_global_entry: tt_global_entry to be free'd | |
21026059 | 253 | */ |
a513088d | 254 | static void |
56303d34 | 255 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 256 | { |
92dcdf09 SE |
257 | kref_put(&tt_global_entry->common.refcount, |
258 | batadv_tt_global_entry_release); | |
db08e6e5 SW |
259 | } |
260 | ||
1d8ab8d3 LL |
261 | /** |
262 | * batadv_tt_global_hash_count - count the number of orig entries | |
d15cd622 | 263 | * @bat_priv: the bat priv with all the soft interface information |
1d8ab8d3 LL |
264 | * @addr: the mac address of the client to count entries for |
265 | * @vid: VLAN identifier | |
266 | * | |
62fe710f | 267 | * Return: the number of originators advertising the given address/data |
1d8ab8d3 LL |
268 | * (excluding ourself). |
269 | */ | |
270 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 271 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
272 | { |
273 | struct batadv_tt_global_entry *tt_global_entry; | |
274 | int count; | |
275 | ||
276 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
277 | if (!tt_global_entry) | |
278 | return 0; | |
279 | ||
280 | count = atomic_read(&tt_global_entry->orig_list_count); | |
281 | batadv_tt_global_entry_free_ref(tt_global_entry); | |
282 | ||
283 | return count; | |
284 | } | |
285 | ||
7ea7b4a1 AQ |
286 | /** |
287 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
288 | * by vid | |
289 | * @bat_priv: the bat priv with all the soft interface information | |
290 | * @vid: the VLAN identifier of the sub-table to change | |
291 | * @v: the amount to sum to the local table size | |
292 | */ | |
293 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
294 | unsigned short vid, int v) | |
295 | { | |
296 | struct batadv_softif_vlan *vlan; | |
297 | ||
298 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
299 | if (!vlan) | |
300 | return; | |
301 | ||
302 | atomic_add(v, &vlan->tt.num_entries); | |
303 | ||
9c3bf081 | 304 | batadv_softif_vlan_put(vlan); |
7ea7b4a1 AQ |
305 | } |
306 | ||
307 | /** | |
308 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
309 | * vid | |
310 | * @bat_priv: the bat priv with all the soft interface information | |
311 | * @vid: the VLAN identifier | |
312 | */ | |
313 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
314 | unsigned short vid) | |
315 | { | |
316 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
317 | } | |
318 | ||
319 | /** | |
320 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
321 | * vid | |
322 | * @bat_priv: the bat priv with all the soft interface information | |
323 | * @vid: the VLAN identifier | |
324 | */ | |
325 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
326 | unsigned short vid) | |
327 | { | |
328 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
329 | } | |
330 | ||
331 | /** | |
d15cd622 AQ |
332 | * batadv_tt_global_size_mod - change the size by v of the global table |
333 | * for orig_node identified by vid | |
334 | * @orig_node: the originator for which the table has to be modified | |
7ea7b4a1 AQ |
335 | * @vid: the VLAN identifier |
336 | * @v: the amount to sum to the global table size | |
337 | */ | |
338 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
339 | unsigned short vid, int v) | |
340 | { | |
341 | struct batadv_orig_node_vlan *vlan; | |
342 | ||
343 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
344 | if (!vlan) | |
345 | return; | |
346 | ||
347 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
348 | spin_lock_bh(&orig_node->vlan_list_lock); | |
3db15209 SE |
349 | if (!hlist_unhashed(&vlan->list)) { |
350 | hlist_del_init_rcu(&vlan->list); | |
351 | batadv_orig_node_vlan_free_ref(vlan); | |
352 | } | |
7ea7b4a1 | 353 | spin_unlock_bh(&orig_node->vlan_list_lock); |
7ea7b4a1 AQ |
354 | } |
355 | ||
356 | batadv_orig_node_vlan_free_ref(vlan); | |
357 | } | |
358 | ||
359 | /** | |
360 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
361 | * given vid | |
362 | * @orig_node: the originator which global table size has to be decreased | |
363 | * @vid: the vlan identifier | |
364 | */ | |
365 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
366 | unsigned short vid) | |
367 | { | |
368 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
369 | } | |
370 | ||
371 | /** | |
372 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
373 | * given vid | |
374 | * @orig_node: the originator which global table size has to be decreased | |
375 | * @vid: the vlan identifier | |
376 | */ | |
377 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
378 | unsigned short vid) | |
379 | { | |
380 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
381 | } | |
382 | ||
42eff6a6 SE |
383 | /** |
384 | * batadv_tt_orig_list_entry_release - release tt orig entry from lists and | |
385 | * queue for free after rcu grace period | |
6e8ef69d | 386 | * @ref: kref pointer of the tt orig entry |
42eff6a6 | 387 | */ |
6e8ef69d | 388 | static void batadv_tt_orig_list_entry_release(struct kref *ref) |
42eff6a6 | 389 | { |
6e8ef69d SE |
390 | struct batadv_tt_orig_list_entry *orig_entry; |
391 | ||
392 | orig_entry = container_of(ref, struct batadv_tt_orig_list_entry, | |
393 | refcount); | |
394 | ||
5d967310 | 395 | batadv_orig_node_put(orig_entry->orig_node); |
42eff6a6 SE |
396 | kfree_rcu(orig_entry, rcu); |
397 | } | |
398 | ||
6e8ef69d SE |
399 | /** |
400 | * batadv_tt_orig_list_entry_free_ref - decrement the tt orig entry refcounter | |
401 | * and possibly release it | |
402 | * @orig_entry: tt orig entry to be free'd | |
403 | */ | |
a513088d | 404 | static void |
56303d34 | 405 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 406 | { |
6e8ef69d | 407 | kref_put(&orig_entry->refcount, batadv_tt_orig_list_entry_release); |
7683fdc1 AQ |
408 | } |
409 | ||
3abe4adb AQ |
410 | /** |
411 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
412 | * @bat_priv: the bat priv with all the soft interface information | |
413 | * @tt_local_entry: the TT entry involved in the event | |
414 | * @event_flags: flags to store in the event structure | |
415 | */ | |
56303d34 | 416 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 417 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 418 | u8 event_flags) |
a73105b8 | 419 | { |
56303d34 | 420 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 421 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 422 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
423 | bool event_removed = false; |
424 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
425 | |
426 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
427 | if (!tt_change_node) |
428 | return; | |
429 | ||
ff66c975 | 430 | tt_change_node->change.flags = flags; |
ca663046 AQ |
431 | memset(tt_change_node->change.reserved, 0, |
432 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 433 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 434 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 435 | |
acd34afa | 436 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
437 | |
438 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
439 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
440 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 441 | list) { |
3abe4adb | 442 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
443 | continue; |
444 | ||
445 | /* DEL+ADD in the same orig interval have no effect and can be | |
446 | * removed to avoid silly behaviour on the receiver side. The | |
447 | * other way around (ADD+DEL) can happen in case of roaming of | |
448 | * a client still in the NEW state. Roaming of NEW clients is | |
449 | * now possible due to automatically recognition of "temporary" | |
450 | * clients | |
451 | */ | |
acd34afa | 452 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
453 | if (!del_op_requested && del_op_entry) |
454 | goto del; | |
455 | if (del_op_requested && !del_op_entry) | |
456 | goto del; | |
3c4f7ab6 AQ |
457 | |
458 | /* this is a second add in the same originator interval. It | |
459 | * means that flags have been changed: update them! | |
460 | */ | |
461 | if (!del_op_requested && !del_op_entry) | |
462 | entry->change.flags = flags; | |
463 | ||
3b643de5 AQ |
464 | continue; |
465 | del: | |
466 | list_del(&entry->list); | |
467 | kfree(entry); | |
155e4e12 | 468 | kfree(tt_change_node); |
3b643de5 AQ |
469 | event_removed = true; |
470 | goto unlock; | |
471 | } | |
472 | ||
a73105b8 | 473 | /* track the change in the OGMinterval list */ |
807736f6 | 474 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
475 | |
476 | unlock: | |
807736f6 | 477 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 478 | |
3b643de5 | 479 | if (event_removed) |
807736f6 | 480 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 481 | else |
807736f6 | 482 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
483 | } |
484 | ||
335fbe0f ML |
485 | /** |
486 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
487 | * @changes_num: number of tt changes | |
488 | * | |
62fe710f | 489 | * Return: computed length in bytes. |
335fbe0f ML |
490 | */ |
491 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 492 | { |
335fbe0f | 493 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
494 | } |
495 | ||
298e6e68 AQ |
496 | /** |
497 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
498 | * @tt_len: available space | |
499 | * | |
62fe710f | 500 | * Return: the number of entries. |
298e6e68 | 501 | */ |
6b5e971a | 502 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
503 | { |
504 | return tt_len / batadv_tt_len(1); | |
505 | } | |
506 | ||
a19d3d85 ML |
507 | /** |
508 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
509 | * size when transmitted over the air | |
510 | * @bat_priv: the bat priv with all the soft interface information | |
511 | * | |
62fe710f | 512 | * Return: local translation table size in bytes. |
a19d3d85 ML |
513 | */ |
514 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
515 | { | |
4f248cff SE |
516 | u16 num_vlan = 0; |
517 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
518 | struct batadv_softif_vlan *vlan; |
519 | int hdr_size; | |
520 | ||
521 | rcu_read_lock(); | |
522 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
523 | num_vlan++; | |
524 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
525 | } | |
526 | rcu_read_unlock(); | |
527 | ||
528 | /* header size of tvlv encapsulated tt response payload */ | |
529 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
530 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
531 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
532 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
533 | ||
534 | return hdr_size + batadv_tt_len(tt_local_entries); | |
535 | } | |
536 | ||
56303d34 | 537 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 538 | { |
807736f6 | 539 | if (bat_priv->tt.local_hash) |
5346c35e | 540 | return 0; |
c6c8fea2 | 541 | |
807736f6 | 542 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 543 | |
807736f6 | 544 | if (!bat_priv->tt.local_hash) |
5346c35e | 545 | return -ENOMEM; |
c6c8fea2 | 546 | |
dec05074 AQ |
547 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
548 | &batadv_tt_local_hash_lock_class_key); | |
549 | ||
5346c35e | 550 | return 0; |
c6c8fea2 SE |
551 | } |
552 | ||
068ee6e2 AQ |
553 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
554 | struct batadv_tt_global_entry *tt_global, | |
555 | const char *message) | |
556 | { | |
557 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
558 | "Deleting global tt entry %pM (vid: %d): %s\n", |
559 | tt_global->common.addr, | |
560 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
561 | |
562 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 563 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 564 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
565 | } |
566 | ||
c018ad3d AQ |
567 | /** |
568 | * batadv_tt_local_add - add a new client to the local table or update an | |
569 | * existing client | |
570 | * @soft_iface: netdev struct of the mesh interface | |
571 | * @addr: the mac address of the client to add | |
572 | * @vid: VLAN identifier | |
573 | * @ifindex: index of the interface where the client is connected to (useful to | |
574 | * identify wireless clients) | |
9464d071 AQ |
575 | * @mark: the value contained in the skb->mark field of the received packet (if |
576 | * any) | |
a19d3d85 | 577 | * |
62fe710f | 578 | * Return: true if the client was successfully added, false otherwise. |
c018ad3d | 579 | */ |
6b5e971a SE |
580 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
581 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 582 | { |
56303d34 | 583 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 584 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 585 | struct batadv_tt_global_entry *tt_global = NULL; |
35df3b29 | 586 | struct batadv_softif_vlan *vlan; |
0c69aecc | 587 | struct net_device *in_dev = NULL; |
db08e6e5 | 588 | struct hlist_head *head; |
56303d34 | 589 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 590 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
591 | bool ret = false; |
592 | bool roamed_back = false; | |
6b5e971a SE |
593 | u8 remote_flags; |
594 | u32 match_mark; | |
c6c8fea2 | 595 | |
0c69aecc AQ |
596 | if (ifindex != BATADV_NULL_IFINDEX) |
597 | in_dev = dev_get_by_index(&init_net, ifindex); | |
598 | ||
c018ad3d | 599 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
600 | |
601 | if (!is_multicast_ether_addr(addr)) | |
602 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 603 | |
47c94655 AQ |
604 | if (tt_local) { |
605 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
606 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
607 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
608 | "Re-adding pending client %pM (vid: %d)\n", |
609 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
610 | /* whatever the reason why the PENDING flag was set, |
611 | * this is a client which was enqueued to be removed in | |
612 | * this orig_interval. Since it popped up again, the | |
613 | * flag can be reset like it was never enqueued | |
614 | */ | |
615 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
616 | goto add_event; | |
617 | } | |
618 | ||
619 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
620 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
621 | "Roaming client %pM (vid: %d) came back to its original location\n", |
622 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
623 | /* the ROAM flag is set because this client roamed away |
624 | * and the node got a roaming_advertisement message. Now | |
625 | * that the client popped up again at its original | |
626 | * location such flag can be unset | |
627 | */ | |
628 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
629 | roamed_back = true; | |
630 | } | |
631 | goto check_roaming; | |
c6c8fea2 SE |
632 | } |
633 | ||
a19d3d85 ML |
634 | /* Ignore the client if we cannot send it in a full table response. */ |
635 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
636 | table_size += batadv_tt_len(1); | |
637 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
638 | if (table_size > packet_size_max) { | |
639 | net_ratelimited_function(batadv_info, soft_iface, | |
640 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
641 | table_size, packet_size_max, addr); | |
642 | goto out; | |
643 | } | |
644 | ||
47c94655 AQ |
645 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
646 | if (!tt_local) | |
7683fdc1 | 647 | goto out; |
a73105b8 | 648 | |
35df3b29 AQ |
649 | /* increase the refcounter of the related vlan */ |
650 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc | 651 | if (WARN(!vlan, "adding TT local entry %pM to non-existent VLAN %d", |
fd7dec25 SE |
652 | addr, BATADV_PRINT_VID(vid))) { |
653 | kfree(tt_local); | |
654 | tt_local = NULL; | |
354136bc | 655 | goto out; |
fd7dec25 | 656 | } |
35df3b29 | 657 | |
39c75a51 | 658 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
659 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
660 | addr, BATADV_PRINT_VID(vid), | |
6b5e971a | 661 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 662 | |
8fdd0153 | 663 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
664 | /* The local entry has to be marked as NEW to avoid to send it in |
665 | * a full table response going out before the next ttvn increment | |
666 | * (consistency check) | |
667 | */ | |
668 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 669 | tt_local->common.vid = vid; |
0c69aecc | 670 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 | 671 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
92dcdf09 SE |
672 | kref_init(&tt_local->common.refcount); |
673 | kref_get(&tt_local->common.refcount); | |
47c94655 AQ |
674 | tt_local->last_seen = jiffies; |
675 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 676 | |
c5caf4ef LL |
677 | /* the batman interface mac and multicast addresses should never be |
678 | * purged | |
679 | */ | |
680 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
681 | is_multicast_ether_addr(addr)) | |
47c94655 | 682 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 683 | |
807736f6 | 684 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 685 | batadv_choose_tt, &tt_local->common, |
47c94655 | 686 | &tt_local->common.hash_entry); |
80b3f58c SW |
687 | |
688 | if (unlikely(hash_added != 0)) { | |
689 | /* remove the reference for the hash */ | |
47c94655 | 690 | batadv_tt_local_entry_free_ref(tt_local); |
9c3bf081 | 691 | batadv_softif_vlan_put(vlan); |
80b3f58c SW |
692 | goto out; |
693 | } | |
694 | ||
068ee6e2 | 695 | add_event: |
3abe4adb | 696 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 697 | |
068ee6e2 AQ |
698 | check_roaming: |
699 | /* Check whether it is a roaming, but don't do anything if the roaming | |
700 | * process has already been handled | |
701 | */ | |
702 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 703 | /* These node are probably going to update their tt table */ |
47c94655 | 704 | head = &tt_global->orig_list; |
db08e6e5 | 705 | rcu_read_lock(); |
b67bfe0d | 706 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 707 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 708 | tt_global->common.vid, |
a513088d | 709 | orig_entry->orig_node); |
db08e6e5 SW |
710 | } |
711 | rcu_read_unlock(); | |
068ee6e2 AQ |
712 | if (roamed_back) { |
713 | batadv_tt_global_free(bat_priv, tt_global, | |
714 | "Roaming canceled"); | |
715 | tt_global = NULL; | |
716 | } else { | |
717 | /* The global entry has to be marked as ROAMING and | |
718 | * has to be kept for consistency purpose | |
719 | */ | |
720 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
721 | tt_global->roam_at = jiffies; | |
722 | } | |
7683fdc1 | 723 | } |
068ee6e2 | 724 | |
3c4f7ab6 AQ |
725 | /* store the current remote flags before altering them. This helps |
726 | * understanding is flags are changing or not | |
727 | */ | |
728 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
729 | ||
730 | if (batadv_is_wifi_netdev(in_dev)) | |
731 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
732 | else | |
733 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 734 | |
9464d071 AQ |
735 | /* check the mark in the skb: if it's equal to the configured |
736 | * isolation_mark, it means the packet is coming from an isolated | |
737 | * non-mesh client | |
738 | */ | |
739 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
740 | if (bat_priv->isolation_mark_mask && | |
741 | match_mark == bat_priv->isolation_mark) | |
742 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
743 | else | |
744 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
745 | ||
3c4f7ab6 AQ |
746 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
747 | * entry so that all the nodes can get the new flags | |
748 | */ | |
749 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
750 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
751 | ||
752 | ret = true; | |
7683fdc1 | 753 | out: |
0c69aecc AQ |
754 | if (in_dev) |
755 | dev_put(in_dev); | |
47c94655 AQ |
756 | if (tt_local) |
757 | batadv_tt_local_entry_free_ref(tt_local); | |
758 | if (tt_global) | |
759 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 760 | return ret; |
c6c8fea2 SE |
761 | } |
762 | ||
7ea7b4a1 AQ |
763 | /** |
764 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
765 | * within a TT Response directed to another node | |
766 | * @orig_node: originator for which the TT data has to be prepared | |
767 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
768 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
769 | * changed can be stored | |
770 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
771 | * function reserves the amount of space needed to send the entire global TT | |
772 | * table. In case of success the value is updated with the real amount of | |
773 | * reserved bytes | |
7ea7b4a1 AQ |
774 | * Allocate the needed amount of memory for the entire TT TVLV and write its |
775 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
776 | * objects, one per active VLAN served by the originator node. | |
777 | * | |
62fe710f | 778 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 779 | */ |
6b5e971a | 780 | static u16 |
7ea7b4a1 AQ |
781 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
782 | struct batadv_tvlv_tt_data **tt_data, | |
783 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 784 | s32 *tt_len) |
7ea7b4a1 | 785 | { |
4f248cff SE |
786 | u16 num_vlan = 0; |
787 | u16 num_entries = 0; | |
788 | u16 change_offset; | |
789 | u16 tvlv_len; | |
7ea7b4a1 AQ |
790 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
791 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 792 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
793 | |
794 | rcu_read_lock(); | |
d0fa4f3f | 795 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
796 | num_vlan++; |
797 | num_entries += atomic_read(&vlan->tt.num_entries); | |
798 | } | |
799 | ||
800 | change_offset = sizeof(**tt_data); | |
801 | change_offset += num_vlan * sizeof(*tt_vlan); | |
802 | ||
803 | /* if tt_len is negative, allocate the space needed by the full table */ | |
804 | if (*tt_len < 0) | |
805 | *tt_len = batadv_tt_len(num_entries); | |
806 | ||
807 | tvlv_len = *tt_len; | |
808 | tvlv_len += change_offset; | |
809 | ||
810 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
811 | if (!*tt_data) { | |
812 | *tt_len = 0; | |
813 | goto out; | |
814 | } | |
815 | ||
816 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
817 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
818 | (*tt_data)->num_vlan = htons(num_vlan); | |
819 | ||
820 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
d0fa4f3f | 821 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
822 | tt_vlan->vid = htons(vlan->vid); |
823 | tt_vlan->crc = htonl(vlan->tt.crc); | |
824 | ||
825 | tt_vlan++; | |
826 | } | |
827 | ||
6b5e971a | 828 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
829 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
830 | ||
831 | out: | |
832 | rcu_read_unlock(); | |
833 | return tvlv_len; | |
834 | } | |
835 | ||
836 | /** | |
837 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
838 | * node | |
839 | * @bat_priv: the bat priv with all the soft interface information | |
840 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
841 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
842 | * changes can be stored | |
843 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
844 | * function reserves the amount of space needed to send the entire local TT | |
845 | * table. In case of success the value is updated with the real amount of | |
846 | * reserved bytes | |
847 | * | |
848 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
849 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
850 | * objects, one per active VLAN. | |
851 | * | |
62fe710f | 852 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 853 | */ |
6b5e971a | 854 | static u16 |
7ea7b4a1 AQ |
855 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
856 | struct batadv_tvlv_tt_data **tt_data, | |
857 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 858 | s32 *tt_len) |
7ea7b4a1 AQ |
859 | { |
860 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
861 | struct batadv_softif_vlan *vlan; | |
4f248cff SE |
862 | u16 num_vlan = 0; |
863 | u16 num_entries = 0; | |
864 | u16 tvlv_len; | |
6b5e971a | 865 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
866 | int change_offset; |
867 | ||
868 | rcu_read_lock(); | |
869 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
870 | num_vlan++; | |
871 | num_entries += atomic_read(&vlan->tt.num_entries); | |
872 | } | |
873 | ||
874 | change_offset = sizeof(**tt_data); | |
875 | change_offset += num_vlan * sizeof(*tt_vlan); | |
876 | ||
877 | /* if tt_len is negative, allocate the space needed by the full table */ | |
878 | if (*tt_len < 0) | |
879 | *tt_len = batadv_tt_len(num_entries); | |
880 | ||
881 | tvlv_len = *tt_len; | |
882 | tvlv_len += change_offset; | |
883 | ||
884 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
885 | if (!*tt_data) { | |
886 | tvlv_len = 0; | |
887 | goto out; | |
888 | } | |
889 | ||
890 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
891 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
892 | (*tt_data)->num_vlan = htons(num_vlan); | |
893 | ||
894 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
895 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
896 | tt_vlan->vid = htons(vlan->vid); | |
897 | tt_vlan->crc = htonl(vlan->tt.crc); | |
898 | ||
899 | tt_vlan++; | |
900 | } | |
901 | ||
6b5e971a | 902 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
903 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
904 | ||
905 | out: | |
906 | rcu_read_unlock(); | |
907 | return tvlv_len; | |
908 | } | |
909 | ||
e1bf0c14 ML |
910 | /** |
911 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
912 | * after local tt changes have been committed | |
913 | * @bat_priv: the bat priv with all the soft interface information | |
914 | */ | |
915 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 916 | { |
e1bf0c14 ML |
917 | struct batadv_tt_change_node *entry, *safe; |
918 | struct batadv_tvlv_tt_data *tt_data; | |
919 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 920 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
921 | int tt_diff_entries_num = 0; |
922 | int tt_diff_entries_count = 0; | |
6b5e971a | 923 | u16 tvlv_len; |
be9aa4c1 | 924 | |
7ea7b4a1 AQ |
925 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
926 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
927 | |
928 | /* if we have too many changes for one packet don't send any | |
929 | * and wait for the tt table request which will be fragmented | |
930 | */ | |
e1bf0c14 ML |
931 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
932 | tt_diff_len = 0; | |
be9aa4c1 | 933 | |
7ea7b4a1 AQ |
934 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
935 | &tt_change, &tt_diff_len); | |
936 | if (!tvlv_len) | |
e1bf0c14 | 937 | return; |
be9aa4c1 | 938 | |
e1bf0c14 | 939 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 940 | |
e1bf0c14 ML |
941 | if (tt_diff_len == 0) |
942 | goto container_register; | |
be9aa4c1 | 943 | |
807736f6 SE |
944 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
945 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 946 | |
807736f6 | 947 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 948 | list) { |
e1bf0c14 ML |
949 | if (tt_diff_entries_count < tt_diff_entries_num) { |
950 | memcpy(tt_change + tt_diff_entries_count, | |
951 | &entry->change, | |
952 | sizeof(struct batadv_tvlv_tt_change)); | |
953 | tt_diff_entries_count++; | |
c6c8fea2 | 954 | } |
a73105b8 AQ |
955 | list_del(&entry->list); |
956 | kfree(entry); | |
c6c8fea2 | 957 | } |
807736f6 | 958 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
959 | |
960 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
961 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
962 | kfree(bat_priv->tt.last_changeset); | |
963 | bat_priv->tt.last_changeset_len = 0; | |
964 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 965 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 966 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 967 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 968 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
969 | * instead of providing the diff |
970 | */ | |
e1bf0c14 | 971 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 972 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
973 | memcpy(bat_priv->tt.last_changeset, |
974 | tt_change, tt_change_len); | |
975 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
976 | } |
977 | } | |
807736f6 | 978 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 979 | |
e1bf0c14 ML |
980 | container_register: |
981 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 982 | tvlv_len); |
e1bf0c14 | 983 | kfree(tt_data); |
c6c8fea2 SE |
984 | } |
985 | ||
08c36d3e | 986 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
987 | { |
988 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 989 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 990 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 991 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 992 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 993 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 994 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 995 | struct hlist_head *head; |
7ea7b4a1 | 996 | unsigned short vid; |
6b5e971a | 997 | u32 i; |
85766a82 AQ |
998 | int last_seen_secs; |
999 | int last_seen_msecs; | |
1000 | unsigned long last_seen_jiffies; | |
1001 | bool no_purge; | |
6b5e971a | 1002 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 1003 | |
30da63a6 ML |
1004 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1005 | if (!primary_if) | |
32ae9b22 | 1006 | goto out; |
c6c8fea2 | 1007 | |
86ceb360 | 1008 | seq_printf(seq, |
7ea7b4a1 | 1009 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 1010 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
dd24ddb2 | 1011 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 1012 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 1013 | |
c6c8fea2 SE |
1014 | for (i = 0; i < hash->size; i++) { |
1015 | head = &hash->table[i]; | |
1016 | ||
7aadf889 | 1017 | rcu_read_lock(); |
b67bfe0d | 1018 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1019 | head, hash_entry) { |
85766a82 AQ |
1020 | tt_local = container_of(tt_common_entry, |
1021 | struct batadv_tt_local_entry, | |
1022 | common); | |
7ea7b4a1 | 1023 | vid = tt_common_entry->vid; |
85766a82 AQ |
1024 | last_seen_jiffies = jiffies - tt_local->last_seen; |
1025 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1026 | last_seen_secs = last_seen_msecs / 1000; | |
1027 | last_seen_msecs = last_seen_msecs % 1000; | |
1028 | ||
1029 | no_purge = tt_common_entry->flags & np_flag; | |
1030 | ||
7ea7b4a1 AQ |
1031 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
1032 | if (!vlan) { | |
1033 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
1034 | BATADV_PRINT_VID(vid)); | |
1035 | continue; | |
1036 | } | |
1037 | ||
1038 | seq_printf(seq, | |
dd24ddb2 | 1039 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 1040 | tt_common_entry->addr, |
16052789 | 1041 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
1042 | ((tt_common_entry->flags & |
1043 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 1044 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
1045 | ((tt_common_entry->flags & |
1046 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
1047 | ((tt_common_entry->flags & | |
1048 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
1049 | ((tt_common_entry->flags & | |
1050 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1051 | ((tt_common_entry->flags & | |
1052 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1053 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
1054 | no_purge ? 0 : last_seen_msecs, |
1055 | vlan->tt.crc); | |
1056 | ||
9c3bf081 | 1057 | batadv_softif_vlan_put(vlan); |
c6c8fea2 | 1058 | } |
7aadf889 | 1059 | rcu_read_unlock(); |
c6c8fea2 | 1060 | } |
32ae9b22 ML |
1061 | out: |
1062 | if (primary_if) | |
82047ad7 | 1063 | batadv_hardif_put(primary_if); |
30da63a6 | 1064 | return 0; |
c6c8fea2 SE |
1065 | } |
1066 | ||
56303d34 SE |
1067 | static void |
1068 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1069 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1070 | u16 flags, const char *message) |
c6c8fea2 | 1071 | { |
3abe4adb | 1072 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1073 | |
015758d0 AQ |
1074 | /* The local client has to be marked as "pending to be removed" but has |
1075 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1076 | * response issued before the net ttvn increment (consistency check) |
1077 | */ | |
acd34afa | 1078 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1079 | |
39c75a51 | 1080 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1081 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1082 | tt_local_entry->common.addr, | |
1083 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1084 | } |
1085 | ||
7f91d06c AQ |
1086 | /** |
1087 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1088 | * @bat_priv: the bat priv with all the soft interface information | |
1089 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1090 | * @vid: VLAN identifier |
7f91d06c AQ |
1091 | * @message: message to append to the log on deletion |
1092 | * @roaming: true if the deletion is due to a roaming event | |
1093 | * | |
62fe710f | 1094 | * Return: the flags assigned to the local entry before being deleted |
7f91d06c | 1095 | */ |
6b5e971a SE |
1096 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1097 | unsigned short vid, const char *message, | |
1098 | bool roaming) | |
c6c8fea2 | 1099 | { |
170173bf | 1100 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1101 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
35df3b29 | 1102 | struct batadv_softif_vlan *vlan; |
ef72706a | 1103 | void *tt_entry_exists; |
c6c8fea2 | 1104 | |
c018ad3d | 1105 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1106 | if (!tt_local_entry) |
1107 | goto out; | |
1108 | ||
7f91d06c AQ |
1109 | curr_flags = tt_local_entry->common.flags; |
1110 | ||
acd34afa | 1111 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1112 | /* if this global entry addition is due to a roaming, the node has to |
1113 | * mark the local entry as "roamed" in order to correctly reroute | |
1114 | * packets later | |
1115 | */ | |
7c1fd91d | 1116 | if (roaming) { |
acd34afa | 1117 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1118 | /* mark the local client as ROAMed */ |
1119 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1120 | } | |
42d0b044 | 1121 | |
068ee6e2 AQ |
1122 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1123 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1124 | message); | |
1125 | goto out; | |
1126 | } | |
1127 | /* if this client has been added right now, it is possible to | |
1128 | * immediately purge it | |
1129 | */ | |
3abe4adb | 1130 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1131 | |
1132 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1133 | batadv_compare_tt, | |
1134 | batadv_choose_tt, | |
1135 | &tt_local_entry->common); | |
1136 | if (!tt_entry_exists) | |
1137 | goto out; | |
1138 | ||
1139 | /* extra call to free the local tt entry */ | |
068ee6e2 | 1140 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c | 1141 | |
35df3b29 AQ |
1142 | /* decrease the reference held for this vlan */ |
1143 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc ML |
1144 | if (!vlan) |
1145 | goto out; | |
1146 | ||
9c3bf081 SE |
1147 | batadv_softif_vlan_put(vlan); |
1148 | batadv_softif_vlan_put(vlan); | |
35df3b29 | 1149 | |
7683fdc1 AQ |
1150 | out: |
1151 | if (tt_local_entry) | |
a513088d | 1152 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1153 | |
1154 | return curr_flags; | |
c6c8fea2 SE |
1155 | } |
1156 | ||
a19d3d85 ML |
1157 | /** |
1158 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1159 | * @bat_priv: the bat priv with all the soft interface information | |
1160 | * @head: pointer to the list containing the local tt entries | |
1161 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1162 | * inactive or not | |
1163 | */ | |
56303d34 | 1164 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1165 | struct hlist_head *head, |
1166 | int timeout) | |
c6c8fea2 | 1167 | { |
56303d34 SE |
1168 | struct batadv_tt_local_entry *tt_local_entry; |
1169 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1170 | struct hlist_node *node_tmp; |
acd34afa | 1171 | |
b67bfe0d | 1172 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1173 | hash_entry) { |
1174 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1175 | struct batadv_tt_local_entry, |
1176 | common); | |
acd34afa SE |
1177 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1178 | continue; | |
1179 | ||
1180 | /* entry already marked for deletion */ | |
1181 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1182 | continue; | |
1183 | ||
a19d3d85 | 1184 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1185 | continue; |
1186 | ||
1187 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1188 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1189 | } | |
1190 | } | |
1191 | ||
a19d3d85 ML |
1192 | /** |
1193 | * batadv_tt_local_purge - purge inactive tt local entries | |
1194 | * @bat_priv: the bat priv with all the soft interface information | |
1195 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1196 | * inactive or not | |
1197 | */ | |
1198 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1199 | int timeout) | |
acd34afa | 1200 | { |
807736f6 | 1201 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1202 | struct hlist_head *head; |
7683fdc1 | 1203 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1204 | u32 i; |
c6c8fea2 | 1205 | |
c6c8fea2 SE |
1206 | for (i = 0; i < hash->size; i++) { |
1207 | head = &hash->table[i]; | |
7683fdc1 | 1208 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1209 | |
7683fdc1 | 1210 | spin_lock_bh(list_lock); |
a19d3d85 | 1211 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1212 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1213 | } |
c6c8fea2 SE |
1214 | } |
1215 | ||
56303d34 | 1216 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1217 | { |
5bf74e9c | 1218 | struct batadv_hashtable *hash; |
a73105b8 | 1219 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1220 | struct batadv_tt_common_entry *tt_common_entry; |
1221 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 1222 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 1223 | struct hlist_node *node_tmp; |
7683fdc1 | 1224 | struct hlist_head *head; |
6b5e971a | 1225 | u32 i; |
a73105b8 | 1226 | |
807736f6 | 1227 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1228 | return; |
1229 | ||
807736f6 | 1230 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1231 | |
1232 | for (i = 0; i < hash->size; i++) { | |
1233 | head = &hash->table[i]; | |
1234 | list_lock = &hash->list_locks[i]; | |
1235 | ||
1236 | spin_lock_bh(list_lock); | |
b67bfe0d | 1237 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1238 | head, hash_entry) { |
b67bfe0d | 1239 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1240 | tt_local = container_of(tt_common_entry, |
1241 | struct batadv_tt_local_entry, | |
1242 | common); | |
35df3b29 AQ |
1243 | |
1244 | /* decrease the reference held for this vlan */ | |
1245 | vlan = batadv_softif_vlan_get(bat_priv, | |
1246 | tt_common_entry->vid); | |
354136bc | 1247 | if (vlan) { |
9c3bf081 SE |
1248 | batadv_softif_vlan_put(vlan); |
1249 | batadv_softif_vlan_put(vlan); | |
354136bc | 1250 | } |
35df3b29 | 1251 | |
56303d34 | 1252 | batadv_tt_local_entry_free_ref(tt_local); |
a73105b8 AQ |
1253 | } |
1254 | spin_unlock_bh(list_lock); | |
1255 | } | |
1256 | ||
1a8eaf07 | 1257 | batadv_hash_destroy(hash); |
a73105b8 | 1258 | |
807736f6 | 1259 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1260 | } |
1261 | ||
56303d34 | 1262 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1263 | { |
807736f6 | 1264 | if (bat_priv->tt.global_hash) |
5346c35e | 1265 | return 0; |
c6c8fea2 | 1266 | |
807736f6 | 1267 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1268 | |
807736f6 | 1269 | if (!bat_priv->tt.global_hash) |
5346c35e | 1270 | return -ENOMEM; |
c6c8fea2 | 1271 | |
dec05074 AQ |
1272 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1273 | &batadv_tt_global_hash_lock_class_key); | |
1274 | ||
5346c35e | 1275 | return 0; |
c6c8fea2 SE |
1276 | } |
1277 | ||
56303d34 | 1278 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1279 | { |
56303d34 | 1280 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1281 | |
807736f6 | 1282 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1283 | |
807736f6 | 1284 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1285 | list) { |
1286 | list_del(&entry->list); | |
1287 | kfree(entry); | |
1288 | } | |
c6c8fea2 | 1289 | |
807736f6 SE |
1290 | atomic_set(&bat_priv->tt.local_changes, 0); |
1291 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1292 | } |
c6c8fea2 | 1293 | |
62fe710f | 1294 | /** |
d15cd622 AQ |
1295 | * batadv_tt_global_orig_entry_find - find a TT orig_list_entry |
1296 | * @entry: the TT global entry where the orig_list_entry has to be | |
1297 | * extracted from | |
1298 | * @orig_node: the originator for which the orig_list_entry has to be found | |
62fe710f | 1299 | * |
d15cd622 | 1300 | * retrieve the orig_tt_list_entry belonging to orig_node from the |
d657e621 AQ |
1301 | * batadv_tt_global_entry list |
1302 | * | |
62fe710f | 1303 | * Return: it with an increased refcounter, NULL if not found |
db08e6e5 | 1304 | */ |
d657e621 AQ |
1305 | static struct batadv_tt_orig_list_entry * |
1306 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1307 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1308 | { |
d657e621 | 1309 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1310 | const struct hlist_head *head; |
db08e6e5 SW |
1311 | |
1312 | rcu_read_lock(); | |
1313 | head = &entry->orig_list; | |
b67bfe0d | 1314 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1315 | if (tmp_orig_entry->orig_node != orig_node) |
1316 | continue; | |
6e8ef69d | 1317 | if (!kref_get_unless_zero(&tmp_orig_entry->refcount)) |
d657e621 AQ |
1318 | continue; |
1319 | ||
1320 | orig_entry = tmp_orig_entry; | |
1321 | break; | |
db08e6e5 SW |
1322 | } |
1323 | rcu_read_unlock(); | |
d657e621 AQ |
1324 | |
1325 | return orig_entry; | |
1326 | } | |
1327 | ||
62fe710f | 1328 | /** |
d15cd622 AQ |
1329 | * batadv_tt_global_entry_has_orig - check if a TT global entry is also handled |
1330 | * by a given originator | |
1331 | * @entry: the TT global entry to check | |
1332 | * @orig_node: the originator to search in the list | |
62fe710f SE |
1333 | * |
1334 | * find out if an orig_node is already in the list of a tt_global_entry. | |
1335 | * | |
1336 | * Return: true if found, false otherwise | |
d657e621 AQ |
1337 | */ |
1338 | static bool | |
1339 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1340 | const struct batadv_orig_node *orig_node) | |
1341 | { | |
1342 | struct batadv_tt_orig_list_entry *orig_entry; | |
1343 | bool found = false; | |
1344 | ||
1345 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1346 | if (orig_entry) { | |
1347 | found = true; | |
1348 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1349 | } | |
1350 | ||
db08e6e5 SW |
1351 | return found; |
1352 | } | |
1353 | ||
a513088d | 1354 | static void |
d657e621 | 1355 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1356 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1357 | { |
56303d34 | 1358 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1359 | |
d657e621 | 1360 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1361 | if (orig_entry) { |
1362 | /* refresh the ttvn: the current value could be a bogus one that | |
1363 | * was added during a "temporary client detection" | |
1364 | */ | |
1365 | orig_entry->ttvn = ttvn; | |
d657e621 | 1366 | goto out; |
30cfd02b | 1367 | } |
d657e621 | 1368 | |
db08e6e5 SW |
1369 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1370 | if (!orig_entry) | |
d657e621 | 1371 | goto out; |
db08e6e5 SW |
1372 | |
1373 | INIT_HLIST_NODE(&orig_entry->list); | |
7c124391 | 1374 | kref_get(&orig_node->refcount); |
7ea7b4a1 | 1375 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1376 | orig_entry->orig_node = orig_node; |
1377 | orig_entry->ttvn = ttvn; | |
6e8ef69d SE |
1378 | kref_init(&orig_entry->refcount); |
1379 | kref_get(&orig_entry->refcount); | |
db08e6e5 | 1380 | |
d657e621 | 1381 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1382 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1383 | &tt_global->orig_list); |
1384 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1385 | atomic_inc(&tt_global->orig_list_count); |
1386 | ||
d657e621 AQ |
1387 | out: |
1388 | if (orig_entry) | |
1389 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1390 | } |
1391 | ||
d4ff40f6 AQ |
1392 | /** |
1393 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1394 | * @bat_priv: the bat priv with all the soft interface information | |
1395 | * @orig_node: the originator announcing the client | |
1396 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1397 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1398 | * @flags: TT flags that have to be set for this non-mesh client |
1399 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1400 | * | |
1401 | * Add a new TT global entry for the given originator. If the entry already | |
1402 | * exists add a new reference to the given originator (a global entry can have | |
1403 | * references to multiple originators) and adjust the flags attribute to reflect | |
1404 | * the function argument. | |
1405 | * If a TT local entry exists for this non-mesh client remove it. | |
1406 | * | |
1407 | * The caller must hold orig_node refcount. | |
1e5d49fc | 1408 | * |
62fe710f | 1409 | * Return: true if the new entry has been added, false otherwise |
d4ff40f6 | 1410 | */ |
1e5d49fc AQ |
1411 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1412 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1413 | const unsigned char *tt_addr, |
6b5e971a | 1414 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1415 | { |
170173bf SE |
1416 | struct batadv_tt_global_entry *tt_global_entry; |
1417 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1418 | bool ret = false; |
80b3f58c | 1419 | int hash_added; |
56303d34 | 1420 | struct batadv_tt_common_entry *common; |
6b5e971a | 1421 | u16 local_flags; |
c6c8fea2 | 1422 | |
cfd4f757 AQ |
1423 | /* ignore global entries from backbone nodes */ |
1424 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1425 | return true; | |
1426 | ||
c018ad3d AQ |
1427 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1428 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1429 | |
1430 | /* if the node already has a local client for this entry, it has to wait | |
1431 | * for a roaming advertisement instead of manually messing up the global | |
1432 | * table | |
1433 | */ | |
1434 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1435 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1436 | goto out; | |
a73105b8 AQ |
1437 | |
1438 | if (!tt_global_entry) { | |
d4f44692 | 1439 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1440 | if (!tt_global_entry) |
7683fdc1 AQ |
1441 | goto out; |
1442 | ||
c0a55929 | 1443 | common = &tt_global_entry->common; |
8fdd0153 | 1444 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1445 | common->vid = vid; |
db08e6e5 | 1446 | |
d4f44692 | 1447 | common->flags = flags; |
cc47f66e | 1448 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1449 | /* node must store current time in case of roaming. This is |
1450 | * needed to purge this entry out on timeout (if nobody claims | |
1451 | * it) | |
1452 | */ | |
1453 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1454 | tt_global_entry->roam_at = jiffies; | |
92dcdf09 SE |
1455 | kref_init(&common->refcount); |
1456 | kref_get(&common->refcount); | |
30cfd02b | 1457 | common->added_at = jiffies; |
db08e6e5 SW |
1458 | |
1459 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1460 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1461 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1462 | |
807736f6 | 1463 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1464 | batadv_compare_tt, |
c018ad3d | 1465 | batadv_choose_tt, common, |
a513088d | 1466 | &common->hash_entry); |
80b3f58c SW |
1467 | |
1468 | if (unlikely(hash_added != 0)) { | |
1469 | /* remove the reference for the hash */ | |
a513088d | 1470 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1471 | goto out_remove; |
1472 | } | |
a73105b8 | 1473 | } else { |
068ee6e2 | 1474 | common = &tt_global_entry->common; |
30cfd02b AQ |
1475 | /* If there is already a global entry, we can use this one for |
1476 | * our processing. | |
068ee6e2 AQ |
1477 | * But if we are trying to add a temporary client then here are |
1478 | * two options at this point: | |
1479 | * 1) the global client is not a temporary client: the global | |
1480 | * client has to be left as it is, temporary information | |
1481 | * should never override any already known client state | |
1482 | * 2) the global client is a temporary client: purge the | |
1483 | * originator list and add the new one orig_entry | |
30cfd02b | 1484 | */ |
068ee6e2 AQ |
1485 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1486 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1487 | goto out; | |
1488 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1489 | orig_node)) | |
1490 | goto out_remove; | |
1491 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1492 | goto add_orig_entry; | |
1493 | } | |
30cfd02b AQ |
1494 | |
1495 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1496 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1497 | * remove the previous temporary orig node and re-add it | |
1498 | * if required. If the orig entry changed, the new one which | |
1499 | * is a non-temporary entry is preferred. | |
30cfd02b | 1500 | */ |
a6cb3909 SW |
1501 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1502 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1503 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1504 | } | |
db08e6e5 | 1505 | |
e9c00136 AQ |
1506 | /* the change can carry possible "attribute" flags like the |
1507 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1508 | * client entry | |
1509 | */ | |
ad7e2c46 | 1510 | common->flags |= flags; |
e9c00136 | 1511 | |
acd34afa SE |
1512 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1513 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1514 | * delete + roaming change for this originator. |
1515 | * | |
1516 | * We should first delete the old originator before adding the | |
1517 | * new one. | |
1518 | */ | |
068ee6e2 | 1519 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1520 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1521 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1522 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1523 | } |
1524 | } | |
068ee6e2 | 1525 | add_orig_entry: |
30cfd02b | 1526 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1527 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1528 | |
39c75a51 | 1529 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1530 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1531 | common->addr, BATADV_PRINT_VID(common->vid), | |
1532 | orig_node->orig); | |
1e5d49fc | 1533 | ret = true; |
c6c8fea2 | 1534 | |
80b3f58c | 1535 | out_remove: |
c5caf4ef LL |
1536 | /* Do not remove multicast addresses from the local hash on |
1537 | * global additions | |
1538 | */ | |
1539 | if (is_multicast_ether_addr(tt_addr)) | |
1540 | goto out; | |
7f91d06c | 1541 | |
a73105b8 | 1542 | /* remove address from local hash if present */ |
c018ad3d | 1543 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1544 | "global tt received", |
c1d07431 | 1545 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1546 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1547 | ||
068ee6e2 AQ |
1548 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1549 | /* this is a normal global add. Therefore the client is not in a | |
1550 | * roaming state anymore. | |
1551 | */ | |
1552 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1553 | ||
7683fdc1 AQ |
1554 | out: |
1555 | if (tt_global_entry) | |
a513088d | 1556 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1557 | if (tt_local_entry) |
1558 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1559 | return ret; |
c6c8fea2 SE |
1560 | } |
1561 | ||
1b371d13 SW |
1562 | /** |
1563 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1564 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1565 | * @tt_global_entry: global translation table entry to be analyzed |
1566 | * | |
1567 | * This functon assumes the caller holds rcu_read_lock(). | |
62fe710f | 1568 | * Return: best originator list entry or NULL on errors. |
981d8900 SE |
1569 | */ |
1570 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1571 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1572 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1573 | { |
4627456a AQ |
1574 | struct batadv_neigh_node *router, *best_router = NULL; |
1575 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1576 | struct hlist_head *head; |
981d8900 | 1577 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1578 | |
1579 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1580 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1581 | router = batadv_orig_router_get(orig_entry->orig_node, |
1582 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1583 | if (!router) |
1584 | continue; | |
1585 | ||
4627456a | 1586 | if (best_router && |
89652331 SW |
1587 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1588 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
25bb2509 | 1589 | batadv_neigh_node_put(router); |
4627456a | 1590 | continue; |
981d8900 SE |
1591 | } |
1592 | ||
4627456a AQ |
1593 | /* release the refcount for the "old" best */ |
1594 | if (best_router) | |
25bb2509 | 1595 | batadv_neigh_node_put(best_router); |
4627456a AQ |
1596 | |
1597 | best_entry = orig_entry; | |
1598 | best_router = router; | |
981d8900 SE |
1599 | } |
1600 | ||
4627456a | 1601 | if (best_router) |
25bb2509 | 1602 | batadv_neigh_node_put(best_router); |
4627456a | 1603 | |
981d8900 SE |
1604 | return best_entry; |
1605 | } | |
1606 | ||
1b371d13 SW |
1607 | /** |
1608 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1609 | * for this global entry | |
4627456a | 1610 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1611 | * @tt_global_entry: global translation table entry to be printed |
1612 | * @seq: debugfs table seq_file struct | |
1613 | * | |
1614 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1615 | */ |
a513088d | 1616 | static void |
4627456a AQ |
1617 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1618 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1619 | struct seq_file *seq) |
db08e6e5 | 1620 | { |
981d8900 | 1621 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1622 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1623 | struct batadv_orig_node_vlan *vlan; |
1624 | struct hlist_head *head; | |
6b5e971a SE |
1625 | u8 last_ttvn; |
1626 | u16 flags; | |
db08e6e5 SW |
1627 | |
1628 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1629 | flags = tt_common_entry->flags; |
1630 | ||
4627456a | 1631 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1632 | if (best_entry) { |
7ea7b4a1 AQ |
1633 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1634 | tt_common_entry->vid); | |
1635 | if (!vlan) { | |
1636 | seq_printf(seq, | |
1637 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1638 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1639 | best_entry->orig_node->orig); | |
1640 | goto print_list; | |
1641 | } | |
1642 | ||
981d8900 | 1643 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1644 | seq_printf(seq, |
dd24ddb2 | 1645 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1646 | '*', tt_global_entry->common.addr, |
16052789 | 1647 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1648 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1649 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1650 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1651 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1652 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1653 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1654 | |
1655 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1656 | } |
db08e6e5 | 1657 | |
7ea7b4a1 | 1658 | print_list: |
db08e6e5 SW |
1659 | head = &tt_global_entry->orig_list; |
1660 | ||
b67bfe0d | 1661 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1662 | if (best_entry == orig_entry) |
1663 | continue; | |
1664 | ||
7ea7b4a1 AQ |
1665 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1666 | tt_common_entry->vid); | |
1667 | if (!vlan) { | |
1668 | seq_printf(seq, | |
1669 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1670 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1671 | orig_entry->orig_node->orig); | |
1672 | continue; | |
1673 | } | |
1674 | ||
db08e6e5 | 1675 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1676 | seq_printf(seq, |
dd24ddb2 | 1677 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1678 | '+', tt_global_entry->common.addr, |
16052789 | 1679 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1680 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1681 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1682 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1683 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1684 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1685 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1686 | |
1687 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1688 | } |
1689 | } | |
1690 | ||
08c36d3e | 1691 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1692 | { |
1693 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1694 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1695 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1696 | struct batadv_tt_common_entry *tt_common_entry; |
1697 | struct batadv_tt_global_entry *tt_global; | |
1698 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1699 | struct hlist_head *head; |
6b5e971a | 1700 | u32 i; |
c6c8fea2 | 1701 | |
30da63a6 ML |
1702 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1703 | if (!primary_if) | |
32ae9b22 | 1704 | goto out; |
c6c8fea2 | 1705 | |
2dafb49d AQ |
1706 | seq_printf(seq, |
1707 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1708 | net_dev->name); |
16052789 AQ |
1709 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1710 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1711 | "CRC", "Flags"); | |
c6c8fea2 | 1712 | |
c6c8fea2 SE |
1713 | for (i = 0; i < hash->size; i++) { |
1714 | head = &hash->table[i]; | |
1715 | ||
7aadf889 | 1716 | rcu_read_lock(); |
b67bfe0d | 1717 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1718 | head, hash_entry) { |
56303d34 SE |
1719 | tt_global = container_of(tt_common_entry, |
1720 | struct batadv_tt_global_entry, | |
1721 | common); | |
4627456a | 1722 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1723 | } |
7aadf889 | 1724 | rcu_read_unlock(); |
c6c8fea2 | 1725 | } |
32ae9b22 ML |
1726 | out: |
1727 | if (primary_if) | |
82047ad7 | 1728 | batadv_hardif_put(primary_if); |
30da63a6 | 1729 | return 0; |
c6c8fea2 SE |
1730 | } |
1731 | ||
1d8ab8d3 | 1732 | /** |
433ff98f | 1733 | * _batadv_tt_global_del_orig_entry - remove and free an orig_entry |
1d8ab8d3 LL |
1734 | * @tt_global_entry: the global entry to remove the orig_entry from |
1735 | * @orig_entry: the orig entry to remove and free | |
1736 | * | |
1737 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1738 | * free this orig_entry afterwards. | |
433ff98f ML |
1739 | * |
1740 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
1741 | * part of a list. | |
1d8ab8d3 LL |
1742 | */ |
1743 | static void | |
433ff98f ML |
1744 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
1745 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 1746 | { |
2c72d655 SE |
1747 | lockdep_assert_held(&tt_global_entry->list_lock); |
1748 | ||
1d8ab8d3 LL |
1749 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1750 | tt_global_entry->common.vid); | |
1751 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
1752 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
1753 | * being part of a list | |
1754 | */ | |
1d8ab8d3 LL |
1755 | hlist_del_rcu(&orig_entry->list); |
1756 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1757 | } | |
1758 | ||
db08e6e5 | 1759 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1760 | static void |
56303d34 | 1761 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1762 | { |
db08e6e5 | 1763 | struct hlist_head *head; |
b67bfe0d | 1764 | struct hlist_node *safe; |
56303d34 | 1765 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1766 | |
db08e6e5 SW |
1767 | spin_lock_bh(&tt_global_entry->list_lock); |
1768 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 1769 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 1770 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 1771 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1772 | } |
1773 | ||
1d8ab8d3 LL |
1774 | /** |
1775 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1776 | * @bat_priv: the bat priv with all the soft interface information | |
1777 | * @tt_global_entry: the global entry to remove the orig_node from | |
1778 | * @orig_node: the originator announcing the client | |
1779 | * @message: message to append to the log on deletion | |
1780 | * | |
1781 | * Remove the given orig_node and its according orig_entry from the given | |
1782 | * global tt entry. | |
1783 | */ | |
a513088d | 1784 | static void |
1d8ab8d3 LL |
1785 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1786 | struct batadv_tt_global_entry *tt_global_entry, | |
1787 | struct batadv_orig_node *orig_node, | |
1788 | const char *message) | |
db08e6e5 SW |
1789 | { |
1790 | struct hlist_head *head; | |
b67bfe0d | 1791 | struct hlist_node *safe; |
56303d34 | 1792 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1793 | unsigned short vid; |
db08e6e5 SW |
1794 | |
1795 | spin_lock_bh(&tt_global_entry->list_lock); | |
1796 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1797 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1798 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1799 | vid = tt_global_entry->common.vid; |
39c75a51 | 1800 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1801 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1802 | orig_node->orig, |
16052789 AQ |
1803 | tt_global_entry->common.addr, |
1804 | BATADV_PRINT_VID(vid), message); | |
433ff98f ML |
1805 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
1806 | orig_entry); | |
db08e6e5 SW |
1807 | } |
1808 | } | |
1809 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1810 | } | |
1811 | ||
db08e6e5 | 1812 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1813 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1814 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1815 | */ |
a513088d | 1816 | static void |
56303d34 SE |
1817 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1818 | struct batadv_tt_global_entry *tt_global_entry, | |
1819 | struct batadv_orig_node *orig_node, | |
1820 | const char *message) | |
db08e6e5 SW |
1821 | { |
1822 | bool last_entry = true; | |
1823 | struct hlist_head *head; | |
56303d34 | 1824 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1825 | |
1826 | /* no local entry exists, case 1: | |
1827 | * Check if this is the last one or if other entries exist. | |
1828 | */ | |
1829 | ||
1830 | rcu_read_lock(); | |
1831 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1832 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1833 | if (orig_entry->orig_node != orig_node) { |
1834 | last_entry = false; | |
1835 | break; | |
1836 | } | |
1837 | } | |
1838 | rcu_read_unlock(); | |
1839 | ||
1840 | if (last_entry) { | |
1841 | /* its the last one, mark for roaming. */ | |
acd34afa | 1842 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1843 | tt_global_entry->roam_at = jiffies; |
1844 | } else | |
1845 | /* there is another entry, we can simply delete this | |
1846 | * one and can still use the other one. | |
1847 | */ | |
1d8ab8d3 LL |
1848 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1849 | orig_node, message); | |
db08e6e5 SW |
1850 | } |
1851 | ||
c018ad3d AQ |
1852 | /** |
1853 | * batadv_tt_global_del - remove a client from the global table | |
1854 | * @bat_priv: the bat priv with all the soft interface information | |
1855 | * @orig_node: an originator serving this client | |
1856 | * @addr: the mac address of the client | |
1857 | * @vid: VLAN identifier | |
1858 | * @message: a message explaining the reason for deleting the client to print | |
1859 | * for debugging purpose | |
1860 | * @roaming: true if the deletion has been triggered by a roaming event | |
1861 | */ | |
56303d34 SE |
1862 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1863 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1864 | const unsigned char *addr, unsigned short vid, |
a513088d | 1865 | const char *message, bool roaming) |
a73105b8 | 1866 | { |
170173bf | 1867 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1868 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1869 | |
c018ad3d | 1870 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1871 | if (!tt_global_entry) |
7683fdc1 | 1872 | goto out; |
a73105b8 | 1873 | |
db08e6e5 | 1874 | if (!roaming) { |
1d8ab8d3 LL |
1875 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1876 | orig_node, message); | |
db08e6e5 SW |
1877 | |
1878 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1879 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1880 | message); | |
db08e6e5 SW |
1881 | |
1882 | goto out; | |
1883 | } | |
92f90f56 SE |
1884 | |
1885 | /* if we are deleting a global entry due to a roam | |
1886 | * event, there are two possibilities: | |
db08e6e5 SW |
1887 | * 1) the client roamed from node A to node B => if there |
1888 | * is only one originator left for this client, we mark | |
acd34afa | 1889 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1890 | * wait for node B to claim it. In case of timeout |
1891 | * the entry is purged. | |
db08e6e5 SW |
1892 | * |
1893 | * If there are other originators left, we directly delete | |
1894 | * the originator. | |
92f90f56 | 1895 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1896 | * the global entry, since it is useless now. |
1897 | */ | |
a513088d | 1898 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1899 | tt_global_entry->common.addr, |
1900 | vid); | |
a513088d | 1901 | if (local_entry) { |
db08e6e5 | 1902 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1903 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1904 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1905 | } else |
1906 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1907 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1908 | orig_node, message); | |
92f90f56 | 1909 | |
cc47f66e | 1910 | out: |
7683fdc1 | 1911 | if (tt_global_entry) |
a513088d SE |
1912 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1913 | if (local_entry) | |
1914 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1915 | } |
1916 | ||
95fb130d AQ |
1917 | /** |
1918 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1919 | * given originator matching the provided vid | |
1920 | * @bat_priv: the bat priv with all the soft interface information | |
1921 | * @orig_node: the originator owning the entries to remove | |
1922 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1923 | * removed | |
1924 | * @message: debug message to print as "reason" | |
1925 | */ | |
56303d34 SE |
1926 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1927 | struct batadv_orig_node *orig_node, | |
6b5e971a | 1928 | s32 match_vid, |
56303d34 | 1929 | const char *message) |
c6c8fea2 | 1930 | { |
56303d34 SE |
1931 | struct batadv_tt_global_entry *tt_global; |
1932 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 1933 | u32 i; |
807736f6 | 1934 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1935 | struct hlist_node *safe; |
a73105b8 | 1936 | struct hlist_head *head; |
7683fdc1 | 1937 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1938 | unsigned short vid; |
c6c8fea2 | 1939 | |
6e801494 SW |
1940 | if (!hash) |
1941 | return; | |
1942 | ||
a73105b8 AQ |
1943 | for (i = 0; i < hash->size; i++) { |
1944 | head = &hash->table[i]; | |
7683fdc1 | 1945 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1946 | |
7683fdc1 | 1947 | spin_lock_bh(list_lock); |
b67bfe0d | 1948 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1949 | head, hash_entry) { |
95fb130d AQ |
1950 | /* remove only matching entries */ |
1951 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1952 | continue; | |
1953 | ||
56303d34 SE |
1954 | tt_global = container_of(tt_common_entry, |
1955 | struct batadv_tt_global_entry, | |
1956 | common); | |
db08e6e5 | 1957 | |
1d8ab8d3 LL |
1958 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1959 | orig_node, message); | |
db08e6e5 | 1960 | |
56303d34 | 1961 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1962 | vid = tt_global->common.vid; |
39c75a51 | 1963 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1964 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1965 | tt_global->common.addr, | |
1966 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1967 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1968 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1969 | } |
a73105b8 | 1970 | } |
7683fdc1 | 1971 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1972 | } |
ac4eebd4 | 1973 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
1974 | } |
1975 | ||
30cfd02b AQ |
1976 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1977 | char **msg) | |
cc47f66e | 1978 | { |
30cfd02b AQ |
1979 | bool purge = false; |
1980 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1981 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1982 | |
30cfd02b AQ |
1983 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1984 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1985 | purge = true; | |
1986 | *msg = "Roaming timeout\n"; | |
1987 | } | |
42d0b044 | 1988 | |
30cfd02b AQ |
1989 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1990 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1991 | purge = true; | |
1992 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1993 | } |
30cfd02b AQ |
1994 | |
1995 | return purge; | |
42d0b044 SE |
1996 | } |
1997 | ||
30cfd02b | 1998 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1999 | { |
807736f6 | 2000 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 2001 | struct hlist_head *head; |
b67bfe0d | 2002 | struct hlist_node *node_tmp; |
7683fdc1 | 2003 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 2004 | u32 i; |
30cfd02b AQ |
2005 | char *msg = NULL; |
2006 | struct batadv_tt_common_entry *tt_common; | |
2007 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 2008 | |
cc47f66e AQ |
2009 | for (i = 0; i < hash->size; i++) { |
2010 | head = &hash->table[i]; | |
7683fdc1 | 2011 | list_lock = &hash->list_locks[i]; |
cc47f66e | 2012 | |
7683fdc1 | 2013 | spin_lock_bh(list_lock); |
b67bfe0d | 2014 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
2015 | hash_entry) { |
2016 | tt_global = container_of(tt_common, | |
2017 | struct batadv_tt_global_entry, | |
2018 | common); | |
2019 | ||
2020 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
2021 | continue; | |
2022 | ||
2023 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
2024 | "Deleting global tt entry %pM (vid: %d): %s\n", |
2025 | tt_global->common.addr, | |
2026 | BATADV_PRINT_VID(tt_global->common.vid), | |
2027 | msg); | |
30cfd02b | 2028 | |
b67bfe0d | 2029 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
2030 | |
2031 | batadv_tt_global_entry_free_ref(tt_global); | |
2032 | } | |
7683fdc1 | 2033 | spin_unlock_bh(list_lock); |
cc47f66e | 2034 | } |
cc47f66e AQ |
2035 | } |
2036 | ||
56303d34 | 2037 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 2038 | { |
5bf74e9c | 2039 | struct batadv_hashtable *hash; |
7683fdc1 | 2040 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
2041 | struct batadv_tt_common_entry *tt_common_entry; |
2042 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 2043 | struct hlist_node *node_tmp; |
7683fdc1 | 2044 | struct hlist_head *head; |
6b5e971a | 2045 | u32 i; |
7683fdc1 | 2046 | |
807736f6 | 2047 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
2048 | return; |
2049 | ||
807736f6 | 2050 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
2051 | |
2052 | for (i = 0; i < hash->size; i++) { | |
2053 | head = &hash->table[i]; | |
2054 | list_lock = &hash->list_locks[i]; | |
2055 | ||
2056 | spin_lock_bh(list_lock); | |
b67bfe0d | 2057 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 2058 | head, hash_entry) { |
b67bfe0d | 2059 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
2060 | tt_global = container_of(tt_common_entry, |
2061 | struct batadv_tt_global_entry, | |
2062 | common); | |
2063 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
2064 | } |
2065 | spin_unlock_bh(list_lock); | |
2066 | } | |
2067 | ||
1a8eaf07 | 2068 | batadv_hash_destroy(hash); |
7683fdc1 | 2069 | |
807736f6 | 2070 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2071 | } |
2072 | ||
56303d34 SE |
2073 | static bool |
2074 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2075 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
2076 | { |
2077 | bool ret = false; | |
2078 | ||
acd34afa SE |
2079 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2080 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
2081 | ret = true; |
2082 | ||
2d2fcc2a AQ |
2083 | /* check if the two clients are marked as isolated */ |
2084 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2085 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
2086 | ret = true; | |
2087 | ||
59b699cd AQ |
2088 | return ret; |
2089 | } | |
2090 | ||
c018ad3d AQ |
2091 | /** |
2092 | * batadv_transtable_search - get the mesh destination for a given client | |
2093 | * @bat_priv: the bat priv with all the soft interface information | |
2094 | * @src: mac address of the source client | |
2095 | * @addr: mac address of the destination client | |
2096 | * @vid: VLAN identifier | |
2097 | * | |
62fe710f | 2098 | * Return: a pointer to the originator that was selected as destination in the |
c018ad3d AQ |
2099 | * mesh for contacting the client 'addr', NULL otherwise. |
2100 | * In case of multiple originators serving the same client, the function returns | |
2101 | * the best one (best in terms of metric towards the destination node). | |
2102 | * | |
2103 | * If the two clients are AP isolated the function returns NULL. | |
2104 | */ | |
56303d34 | 2105 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2106 | const u8 *src, |
2107 | const u8 *addr, | |
c018ad3d | 2108 | unsigned short vid) |
c6c8fea2 | 2109 | { |
56303d34 SE |
2110 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2111 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2112 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2113 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2114 | |
eceb22ae | 2115 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2116 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2117 | if (!tt_local_entry || |
2118 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2119 | goto out; |
2120 | } | |
7aadf889 | 2121 | |
c018ad3d | 2122 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2123 | if (!tt_global_entry) |
7b36e8ee | 2124 | goto out; |
7aadf889 | 2125 | |
3d393e47 | 2126 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2127 | * isolation |
2128 | */ | |
a513088d SE |
2129 | if (tt_local_entry && |
2130 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2131 | goto out; |
2132 | ||
db08e6e5 | 2133 | rcu_read_lock(); |
4627456a | 2134 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2135 | /* found anything? */ |
981d8900 SE |
2136 | if (best_entry) |
2137 | orig_node = best_entry->orig_node; | |
7c124391 | 2138 | if (orig_node && !kref_get_unless_zero(&orig_node->refcount)) |
db08e6e5 SW |
2139 | orig_node = NULL; |
2140 | rcu_read_unlock(); | |
981d8900 | 2141 | |
7b36e8ee | 2142 | out: |
3d393e47 | 2143 | if (tt_global_entry) |
a513088d | 2144 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 2145 | if (tt_local_entry) |
a513088d | 2146 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 2147 | |
7b36e8ee | 2148 | return orig_node; |
c6c8fea2 | 2149 | } |
a73105b8 | 2150 | |
ced72933 AQ |
2151 | /** |
2152 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2153 | * to the given orig_node | |
2154 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2155 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2156 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2157 | * |
2158 | * This function computes the checksum for the global table corresponding to a | |
2159 | * specific originator. In particular, the checksum is computed as follows: For | |
2160 | * each client connected to the originator the CRC32C of the MAC address and the | |
2161 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2162 | * together. | |
2163 | * | |
2164 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2165 | * produce a unique hash of the table, but since the order which is used to feed | |
2166 | * the CRC32C function affects the result and since every node in the network | |
2167 | * probably sorts the clients differently, the hash function cannot be directly | |
2168 | * computed over the entire table. Hence the CRC32C is used only on | |
2169 | * the single client entry, while all the results are then xor'ed together | |
2170 | * because the XOR operation can combine them all while trying to reduce the | |
2171 | * noise as much as possible. | |
2172 | * | |
62fe710f | 2173 | * Return: the checksum of the global table of a given originator. |
ced72933 | 2174 | */ |
6b5e971a SE |
2175 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2176 | struct batadv_orig_node *orig_node, | |
2177 | unsigned short vid) | |
a73105b8 | 2178 | { |
807736f6 | 2179 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2180 | struct batadv_tt_common_entry *tt_common; |
2181 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2182 | struct hlist_head *head; |
6b5e971a SE |
2183 | u32 i, crc_tmp, crc = 0; |
2184 | u8 flags; | |
a30e22ca | 2185 | __be16 tmp_vid; |
a73105b8 AQ |
2186 | |
2187 | for (i = 0; i < hash->size; i++) { | |
2188 | head = &hash->table[i]; | |
2189 | ||
2190 | rcu_read_lock(); | |
b67bfe0d | 2191 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2192 | tt_global = container_of(tt_common, |
2193 | struct batadv_tt_global_entry, | |
2194 | common); | |
7ea7b4a1 AQ |
2195 | /* compute the CRC only for entries belonging to the |
2196 | * VLAN identified by the vid passed as parameter | |
2197 | */ | |
2198 | if (tt_common->vid != vid) | |
2199 | continue; | |
2200 | ||
db08e6e5 SW |
2201 | /* Roaming clients are in the global table for |
2202 | * consistency only. They don't have to be | |
2203 | * taken into account while computing the | |
2204 | * global crc | |
2205 | */ | |
acd34afa | 2206 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2207 | continue; |
30cfd02b AQ |
2208 | /* Temporary clients have not been announced yet, so |
2209 | * they have to be skipped while computing the global | |
2210 | * crc | |
2211 | */ | |
2212 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2213 | continue; | |
db08e6e5 SW |
2214 | |
2215 | /* find out if this global entry is announced by this | |
2216 | * originator | |
2217 | */ | |
56303d34 | 2218 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2219 | orig_node)) |
db08e6e5 SW |
2220 | continue; |
2221 | ||
a30e22ca AQ |
2222 | /* use network order to read the VID: this ensures that |
2223 | * every node reads the bytes in the same order. | |
2224 | */ | |
2225 | tmp_vid = htons(tt_common->vid); | |
2226 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2227 | |
2228 | /* compute the CRC on flags that have to be kept in sync | |
2229 | * among nodes | |
2230 | */ | |
2231 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2232 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2233 | ||
0ffa9e8d | 2234 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2235 | } |
2236 | rcu_read_unlock(); | |
2237 | } | |
2238 | ||
ced72933 | 2239 | return crc; |
a73105b8 AQ |
2240 | } |
2241 | ||
ced72933 AQ |
2242 | /** |
2243 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2244 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2245 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2246 | * |
2247 | * For details about the computation, please refer to the documentation for | |
2248 | * batadv_tt_global_crc(). | |
2249 | * | |
62fe710f | 2250 | * Return: the checksum of the local table |
ced72933 | 2251 | */ |
6b5e971a SE |
2252 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2253 | unsigned short vid) | |
a73105b8 | 2254 | { |
807736f6 | 2255 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2256 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2257 | struct hlist_head *head; |
6b5e971a SE |
2258 | u32 i, crc_tmp, crc = 0; |
2259 | u8 flags; | |
a30e22ca | 2260 | __be16 tmp_vid; |
a73105b8 AQ |
2261 | |
2262 | for (i = 0; i < hash->size; i++) { | |
2263 | head = &hash->table[i]; | |
2264 | ||
2265 | rcu_read_lock(); | |
b67bfe0d | 2266 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2267 | /* compute the CRC only for entries belonging to the |
2268 | * VLAN identified by vid | |
2269 | */ | |
2270 | if (tt_common->vid != vid) | |
2271 | continue; | |
2272 | ||
058d0e26 | 2273 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2274 | * account while computing the CRC |
2275 | */ | |
acd34afa | 2276 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2277 | continue; |
ced72933 | 2278 | |
a30e22ca AQ |
2279 | /* use network order to read the VID: this ensures that |
2280 | * every node reads the bytes in the same order. | |
2281 | */ | |
2282 | tmp_vid = htons(tt_common->vid); | |
2283 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2284 | |
2285 | /* compute the CRC on flags that have to be kept in sync | |
2286 | * among nodes | |
2287 | */ | |
2288 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2289 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2290 | ||
0ffa9e8d | 2291 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2292 | } |
a73105b8 AQ |
2293 | rcu_read_unlock(); |
2294 | } | |
2295 | ||
ced72933 | 2296 | return crc; |
a73105b8 AQ |
2297 | } |
2298 | ||
56303d34 | 2299 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2300 | { |
7c26a53b ML |
2301 | struct batadv_tt_req_node *node; |
2302 | struct hlist_node *safe; | |
a73105b8 | 2303 | |
807736f6 | 2304 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2305 | |
7c26a53b ML |
2306 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2307 | hlist_del_init(&node->list); | |
a73105b8 AQ |
2308 | kfree(node); |
2309 | } | |
2310 | ||
807736f6 | 2311 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2312 | } |
2313 | ||
56303d34 SE |
2314 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2315 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2316 | const void *tt_buff, |
6b5e971a | 2317 | u16 tt_buff_len) |
a73105b8 | 2318 | { |
a73105b8 | 2319 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2320 | * last OGM (the OGM could carry no changes) |
2321 | */ | |
a73105b8 AQ |
2322 | spin_lock_bh(&orig_node->tt_buff_lock); |
2323 | if (tt_buff_len > 0) { | |
2324 | kfree(orig_node->tt_buff); | |
2325 | orig_node->tt_buff_len = 0; | |
2326 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2327 | if (orig_node->tt_buff) { | |
2328 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2329 | orig_node->tt_buff_len = tt_buff_len; | |
2330 | } | |
2331 | } | |
2332 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2333 | } | |
2334 | ||
56303d34 | 2335 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2336 | { |
7c26a53b ML |
2337 | struct batadv_tt_req_node *node; |
2338 | struct hlist_node *safe; | |
a73105b8 | 2339 | |
807736f6 | 2340 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2341 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2342 | if (batadv_has_timed_out(node->issued_at, |
2343 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2344 | hlist_del_init(&node->list); |
a73105b8 AQ |
2345 | kfree(node); |
2346 | } | |
2347 | } | |
807736f6 | 2348 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2349 | } |
2350 | ||
383b8636 ML |
2351 | /** |
2352 | * batadv_tt_req_node_new - search and possibly create a tt_req_node object | |
2353 | * @bat_priv: the bat priv with all the soft interface information | |
2354 | * @orig_node: orig node this request is being issued for | |
2355 | * | |
62fe710f | 2356 | * Return: the pointer to the new tt_req_node struct if no request |
383b8636 | 2357 | * has already been issued for this orig_node, NULL otherwise. |
9cfc7bd6 | 2358 | */ |
56303d34 | 2359 | static struct batadv_tt_req_node * |
383b8636 | 2360 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2361 | struct batadv_orig_node *orig_node) |
a73105b8 | 2362 | { |
56303d34 | 2363 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2364 | |
807736f6 | 2365 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2366 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2367 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2368 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2369 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2370 | goto unlock; |
2371 | } | |
2372 | ||
2373 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2374 | if (!tt_req_node) | |
2375 | goto unlock; | |
2376 | ||
8fdd0153 | 2377 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2378 | tt_req_node->issued_at = jiffies; |
2379 | ||
7c26a53b | 2380 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2381 | unlock: |
807736f6 | 2382 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2383 | return tt_req_node; |
2384 | } | |
2385 | ||
335fbe0f ML |
2386 | /** |
2387 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2388 | * @entry_ptr: to be checked local tt entry | |
2389 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2390 | * | |
62fe710f | 2391 | * Return: 1 if the entry is a valid, 0 otherwise. |
335fbe0f ML |
2392 | */ |
2393 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2394 | { |
56303d34 | 2395 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2396 | |
acd34afa | 2397 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2398 | return 0; |
2399 | return 1; | |
2400 | } | |
2401 | ||
a513088d SE |
2402 | static int batadv_tt_global_valid(const void *entry_ptr, |
2403 | const void *data_ptr) | |
a73105b8 | 2404 | { |
56303d34 SE |
2405 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2406 | const struct batadv_tt_global_entry *tt_global_entry; | |
2407 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2408 | |
30cfd02b AQ |
2409 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2410 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2411 | return 0; |
2412 | ||
56303d34 SE |
2413 | tt_global_entry = container_of(tt_common_entry, |
2414 | struct batadv_tt_global_entry, | |
48100bac AQ |
2415 | common); |
2416 | ||
a513088d | 2417 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2418 | } |
2419 | ||
335fbe0f | 2420 | /** |
7ea7b4a1 AQ |
2421 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2422 | * specified tt hash | |
335fbe0f ML |
2423 | * @bat_priv: the bat priv with all the soft interface information |
2424 | * @hash: hash table containing the tt entries | |
2425 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2426 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2427 | * @valid_cb: function to filter tt change entries |
2428 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2429 | */ |
7ea7b4a1 AQ |
2430 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2431 | struct batadv_hashtable *hash, | |
6b5e971a | 2432 | void *tvlv_buff, u16 tt_len, |
7ea7b4a1 AQ |
2433 | int (*valid_cb)(const void *, const void *), |
2434 | void *cb_data) | |
a73105b8 | 2435 | { |
56303d34 | 2436 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2437 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2438 | struct hlist_head *head; |
6b5e971a SE |
2439 | u16 tt_tot, tt_num_entries = 0; |
2440 | u32 i; | |
a73105b8 | 2441 | |
298e6e68 | 2442 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2443 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2444 | |
2445 | rcu_read_lock(); | |
2446 | for (i = 0; i < hash->size; i++) { | |
2447 | head = &hash->table[i]; | |
2448 | ||
b67bfe0d | 2449 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2450 | head, hash_entry) { |
335fbe0f | 2451 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2452 | break; |
2453 | ||
48100bac | 2454 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2455 | continue; |
2456 | ||
8fdd0153 | 2457 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2458 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2459 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2460 | memset(tt_change->reserved, 0, |
2461 | sizeof(tt_change->reserved)); | |
a73105b8 | 2462 | |
335fbe0f | 2463 | tt_num_entries++; |
a73105b8 AQ |
2464 | tt_change++; |
2465 | } | |
2466 | } | |
2467 | rcu_read_unlock(); | |
7ea7b4a1 | 2468 | } |
a73105b8 | 2469 | |
7ea7b4a1 AQ |
2470 | /** |
2471 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2472 | * @orig_node: originator for which the CRCs have to be checked | |
2473 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2474 | * @num_vlan: number of tvlv VLAN entries | |
7ea7b4a1 | 2475 | * |
62fe710f | 2476 | * Return: true if all the received CRCs match the locally stored ones, false |
7ea7b4a1 AQ |
2477 | * otherwise |
2478 | */ | |
2479 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2480 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2481 | u16 num_vlan) |
7ea7b4a1 AQ |
2482 | { |
2483 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2484 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 2485 | int i, orig_num_vlan; |
6b5e971a | 2486 | u32 crc; |
7ea7b4a1 AQ |
2487 | |
2488 | /* check if each received CRC matches the locally stored one */ | |
2489 | for (i = 0; i < num_vlan; i++) { | |
2490 | tt_vlan_tmp = tt_vlan + i; | |
2491 | ||
2492 | /* if orig_node is a backbone node for this VLAN, don't check | |
2493 | * the CRC as we ignore all the global entries over it | |
2494 | */ | |
2495 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2496 | orig_node->orig, |
2497 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2498 | continue; |
2499 | ||
2500 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2501 | ntohs(tt_vlan_tmp->vid)); | |
2502 | if (!vlan) | |
2503 | return false; | |
2504 | ||
91c2b1a9 AQ |
2505 | crc = vlan->tt.crc; |
2506 | batadv_orig_node_vlan_free_ref(vlan); | |
2507 | ||
2508 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2509 | return false; |
2510 | } | |
2511 | ||
c169c59d SW |
2512 | /* check if any excess VLANs exist locally for the originator |
2513 | * which are not mentioned in the TVLV from the originator. | |
2514 | */ | |
2515 | rcu_read_lock(); | |
2516 | orig_num_vlan = 0; | |
2517 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
2518 | orig_num_vlan++; | |
2519 | rcu_read_unlock(); | |
2520 | ||
2521 | if (orig_num_vlan > num_vlan) | |
2522 | return false; | |
2523 | ||
7ea7b4a1 AQ |
2524 | return true; |
2525 | } | |
2526 | ||
2527 | /** | |
2528 | * batadv_tt_local_update_crc - update all the local CRCs | |
2529 | * @bat_priv: the bat priv with all the soft interface information | |
2530 | */ | |
2531 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2532 | { | |
2533 | struct batadv_softif_vlan *vlan; | |
2534 | ||
2535 | /* recompute the global CRC for each VLAN */ | |
2536 | rcu_read_lock(); | |
2537 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2538 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2539 | } | |
2540 | rcu_read_unlock(); | |
2541 | } | |
2542 | ||
2543 | /** | |
2544 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2545 | * @bat_priv: the bat priv with all the soft interface information | |
2546 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2547 | */ | |
2548 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2549 | struct batadv_orig_node *orig_node) | |
2550 | { | |
2551 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2552 | u32 crc; |
7ea7b4a1 AQ |
2553 | |
2554 | /* recompute the global CRC for each VLAN */ | |
2555 | rcu_read_lock(); | |
d0fa4f3f | 2556 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
2557 | /* if orig_node is a backbone node for this VLAN, don't compute |
2558 | * the CRC as we ignore all the global entries over it | |
2559 | */ | |
cfd4f757 AQ |
2560 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2561 | vlan->vid)) | |
7ea7b4a1 AQ |
2562 | continue; |
2563 | ||
2564 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2565 | vlan->tt.crc = crc; | |
2566 | } | |
2567 | rcu_read_unlock(); | |
a73105b8 AQ |
2568 | } |
2569 | ||
ced72933 AQ |
2570 | /** |
2571 | * batadv_send_tt_request - send a TT Request message to a given node | |
2572 | * @bat_priv: the bat priv with all the soft interface information | |
2573 | * @dst_orig_node: the destination of the message | |
2574 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2575 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2576 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2577 | * @full_table: ask for the entire translation table if true, while only for the |
2578 | * last TT diff otherwise | |
d15cd622 AQ |
2579 | * |
2580 | * Return: true if the TT Request was sent, false otherwise | |
ced72933 | 2581 | */ |
56303d34 SE |
2582 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2583 | struct batadv_orig_node *dst_orig_node, | |
6b5e971a | 2584 | u8 ttvn, |
7ea7b4a1 | 2585 | struct batadv_tvlv_tt_vlan_data *tt_vlan, |
6b5e971a | 2586 | u16 num_vlan, bool full_table) |
a73105b8 | 2587 | { |
335fbe0f | 2588 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2589 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2590 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2591 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2592 | bool ret = false; |
7ea7b4a1 | 2593 | int i, size; |
a73105b8 | 2594 | |
e5d89254 | 2595 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2596 | if (!primary_if) |
2597 | goto out; | |
2598 | ||
2599 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2600 | * reply from the same orig_node yet |
2601 | */ | |
383b8636 | 2602 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
2603 | if (!tt_req_node) |
2604 | goto out; | |
2605 | ||
7ea7b4a1 AQ |
2606 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2607 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2608 | if (!tvlv_tt_data) |
a73105b8 AQ |
2609 | goto out; |
2610 | ||
335fbe0f ML |
2611 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2612 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2613 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2614 | ||
2615 | /* send all the CRCs within the request. This is needed by intermediate | |
2616 | * nodes to ensure they have the correct table before replying | |
2617 | */ | |
2618 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2619 | for (i = 0; i < num_vlan; i++) { | |
2620 | tt_vlan_req->vid = tt_vlan->vid; | |
2621 | tt_vlan_req->crc = tt_vlan->crc; | |
2622 | ||
2623 | tt_vlan_req++; | |
2624 | tt_vlan++; | |
2625 | } | |
a73105b8 AQ |
2626 | |
2627 | if (full_table) | |
335fbe0f | 2628 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2629 | |
bb351ba0 | 2630 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2631 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2632 | |
d69909d2 | 2633 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2634 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2635 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2636 | tvlv_tt_data, size); |
335fbe0f | 2637 | ret = true; |
a73105b8 AQ |
2638 | |
2639 | out: | |
a73105b8 | 2640 | if (primary_if) |
82047ad7 | 2641 | batadv_hardif_put(primary_if); |
a73105b8 | 2642 | if (ret && tt_req_node) { |
807736f6 | 2643 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b ML |
2644 | /* hlist_del_init() verifies tt_req_node still is in the list */ |
2645 | hlist_del_init(&tt_req_node->list); | |
807736f6 | 2646 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2647 | kfree(tt_req_node); |
2648 | } | |
335fbe0f | 2649 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2650 | return ret; |
2651 | } | |
2652 | ||
335fbe0f ML |
2653 | /** |
2654 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2655 | * node's translation table | |
2656 | * @bat_priv: the bat priv with all the soft interface information | |
2657 | * @tt_data: tt data containing the tt request information | |
2658 | * @req_src: mac address of tt request sender | |
2659 | * @req_dst: mac address of tt request recipient | |
2660 | * | |
62fe710f | 2661 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2662 | */ |
2663 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2664 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2665 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2666 | { |
170173bf | 2667 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2668 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2669 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2670 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2671 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2672 | bool ret = false, full_table; |
6b5e971a SE |
2673 | u8 orig_ttvn, req_ttvn; |
2674 | u16 tvlv_len; | |
2675 | s32 tt_len; | |
a73105b8 | 2676 | |
39c75a51 | 2677 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2678 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 2679 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 2680 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
2681 | |
2682 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2683 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2684 | if (!req_dst_orig_node) |
2685 | goto out; | |
2686 | ||
335fbe0f | 2687 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2688 | if (!res_dst_orig_node) |
2689 | goto out; | |
2690 | ||
6b5e971a | 2691 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2692 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2693 | |
7ea7b4a1 | 2694 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2695 | /* this node doesn't have the requested data */ |
a73105b8 | 2696 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2697 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2698 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2699 | goto out; |
2700 | ||
015758d0 | 2701 | /* If the full table has been explicitly requested */ |
335fbe0f | 2702 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2703 | !req_dst_orig_node->tt_buff) |
2704 | full_table = true; | |
2705 | else | |
2706 | full_table = false; | |
2707 | ||
335fbe0f ML |
2708 | /* TT fragmentation hasn't been implemented yet, so send as many |
2709 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2710 | */ |
a73105b8 AQ |
2711 | if (!full_table) { |
2712 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2713 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2714 | |
7ea7b4a1 AQ |
2715 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2716 | &tvlv_tt_data, | |
2717 | &tt_change, | |
2718 | &tt_len); | |
2719 | if (!tt_len) | |
a73105b8 AQ |
2720 | goto unlock; |
2721 | ||
a73105b8 | 2722 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2723 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2724 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2725 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2726 | } else { | |
7ea7b4a1 AQ |
2727 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2728 | * in the initial part | |
2729 | */ | |
2730 | tt_len = -1; | |
2731 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2732 | &tvlv_tt_data, | |
2733 | &tt_change, | |
2734 | &tt_len); | |
2735 | if (!tt_len) | |
a73105b8 | 2736 | goto out; |
7ea7b4a1 AQ |
2737 | |
2738 | /* fill the rest of the tvlv with the real TT entries */ | |
2739 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2740 | tt_change, tt_len, | |
2741 | batadv_tt_global_valid, | |
2742 | req_dst_orig_node); | |
a73105b8 AQ |
2743 | } |
2744 | ||
a19d3d85 ML |
2745 | /* Don't send the response, if larger than fragmented packet. */ |
2746 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2747 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2748 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2749 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2750 | res_dst_orig_node->orig); | |
2751 | goto out; | |
2752 | } | |
2753 | ||
335fbe0f ML |
2754 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2755 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2756 | |
2757 | if (full_table) | |
335fbe0f | 2758 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2759 | |
39c75a51 | 2760 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2761 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2762 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2763 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2764 | |
d69909d2 | 2765 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2766 | |
335fbe0f | 2767 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2768 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2769 | tvlv_len); | |
e91ecfc6 | 2770 | |
335fbe0f | 2771 | ret = true; |
a73105b8 AQ |
2772 | goto out; |
2773 | ||
2774 | unlock: | |
2775 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2776 | ||
2777 | out: | |
2778 | if (res_dst_orig_node) | |
5d967310 | 2779 | batadv_orig_node_put(res_dst_orig_node); |
a73105b8 | 2780 | if (req_dst_orig_node) |
5d967310 | 2781 | batadv_orig_node_put(req_dst_orig_node); |
335fbe0f | 2782 | kfree(tvlv_tt_data); |
a73105b8 | 2783 | return ret; |
a73105b8 | 2784 | } |
96412690 | 2785 | |
335fbe0f ML |
2786 | /** |
2787 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2788 | * translation table | |
2789 | * @bat_priv: the bat priv with all the soft interface information | |
2790 | * @tt_data: tt data containing the tt request information | |
2791 | * @req_src: mac address of tt request sender | |
2792 | * | |
62fe710f | 2793 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2794 | */ |
2795 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2796 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2797 | u8 *req_src) |
a73105b8 | 2798 | { |
335fbe0f | 2799 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2800 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2801 | struct batadv_tvlv_tt_change *tt_change; |
2802 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
2803 | u8 my_ttvn, req_ttvn; |
2804 | u16 tvlv_len; | |
a73105b8 | 2805 | bool full_table; |
6b5e971a | 2806 | s32 tt_len; |
a73105b8 | 2807 | |
39c75a51 | 2808 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2809 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 2810 | req_src, tt_data->ttvn, |
a2f2b6cd | 2811 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2812 | |
a70a9aa9 | 2813 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2814 | |
6b5e971a | 2815 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2816 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2817 | |
335fbe0f | 2818 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2819 | if (!orig_node) |
2820 | goto out; | |
2821 | ||
e5d89254 | 2822 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2823 | if (!primary_if) |
2824 | goto out; | |
2825 | ||
2826 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2827 | * is too big send the whole local translation table |
2828 | */ | |
335fbe0f | 2829 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2830 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2831 | full_table = true; |
2832 | else | |
2833 | full_table = false; | |
2834 | ||
335fbe0f ML |
2835 | /* TT fragmentation hasn't been implemented yet, so send as many |
2836 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2837 | */ |
a73105b8 | 2838 | if (!full_table) { |
807736f6 | 2839 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2840 | |
7ea7b4a1 AQ |
2841 | tt_len = bat_priv->tt.last_changeset_len; |
2842 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2843 | &tvlv_tt_data, | |
2844 | &tt_change, | |
2845 | &tt_len); | |
2846 | if (!tt_len) | |
a73105b8 AQ |
2847 | goto unlock; |
2848 | ||
335fbe0f | 2849 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2850 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2851 | bat_priv->tt.last_changeset_len); |
2852 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2853 | } else { |
6b5e971a | 2854 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2855 | |
7ea7b4a1 AQ |
2856 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2857 | * in the initial part | |
2858 | */ | |
2859 | tt_len = -1; | |
2860 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2861 | &tvlv_tt_data, | |
2862 | &tt_change, | |
2863 | &tt_len); | |
2864 | if (!tt_len) | |
a73105b8 | 2865 | goto out; |
7ea7b4a1 AQ |
2866 | |
2867 | /* fill the rest of the tvlv with the real TT entries */ | |
2868 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2869 | tt_change, tt_len, | |
2870 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2871 | } |
2872 | ||
335fbe0f ML |
2873 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2874 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2875 | |
2876 | if (full_table) | |
335fbe0f | 2877 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2878 | |
39c75a51 | 2879 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2880 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2881 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2882 | |
d69909d2 | 2883 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2884 | |
335fbe0f | 2885 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2886 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2887 | tvlv_len); | |
335fbe0f | 2888 | |
a73105b8 AQ |
2889 | goto out; |
2890 | ||
2891 | unlock: | |
807736f6 | 2892 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2893 | out: |
a70a9aa9 | 2894 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2895 | if (orig_node) |
5d967310 | 2896 | batadv_orig_node_put(orig_node); |
a73105b8 | 2897 | if (primary_if) |
82047ad7 | 2898 | batadv_hardif_put(primary_if); |
335fbe0f ML |
2899 | kfree(tvlv_tt_data); |
2900 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2901 | return true; |
2902 | } | |
2903 | ||
335fbe0f ML |
2904 | /** |
2905 | * batadv_send_tt_response - send reply to tt request | |
2906 | * @bat_priv: the bat priv with all the soft interface information | |
2907 | * @tt_data: tt data containing the tt request information | |
2908 | * @req_src: mac address of tt request sender | |
2909 | * @req_dst: mac address of tt request recipient | |
2910 | * | |
62fe710f | 2911 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2912 | */ |
2913 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2914 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2915 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2916 | { |
cfd4f757 | 2917 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2918 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
2919 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
2920 | req_dst); | |
a73105b8 AQ |
2921 | } |
2922 | ||
56303d34 SE |
2923 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2924 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2925 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 2926 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
2927 | { |
2928 | int i; | |
a513088d | 2929 | int roams; |
a73105b8 AQ |
2930 | |
2931 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2932 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2933 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2934 | batadv_tt_global_del(bat_priv, orig_node, |
2935 | (tt_change + i)->addr, | |
c018ad3d | 2936 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2937 | "tt removed by changes", |
2938 | roams); | |
08c36d3e | 2939 | } else { |
08c36d3e | 2940 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2941 | (tt_change + i)->addr, |
c018ad3d | 2942 | ntohs((tt_change + i)->vid), |
d4f44692 | 2943 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2944 | /* In case of problem while storing a |
2945 | * global_entry, we stop the updating | |
2946 | * procedure without committing the | |
2947 | * ttvn change. This will avoid to send | |
2948 | * corrupted data on tt_request | |
2949 | */ | |
2950 | return; | |
08c36d3e | 2951 | } |
a73105b8 | 2952 | } |
ac4eebd4 | 2953 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
2954 | } |
2955 | ||
56303d34 | 2956 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 2957 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
2958 | u8 ttvn, u8 *resp_src, |
2959 | u16 num_entries) | |
a73105b8 | 2960 | { |
170173bf | 2961 | struct batadv_orig_node *orig_node; |
a73105b8 | 2962 | |
335fbe0f | 2963 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2964 | if (!orig_node) |
2965 | goto out; | |
2966 | ||
2967 | /* Purge the old table first.. */ | |
95fb130d AQ |
2968 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2969 | "Received full table"); | |
a73105b8 | 2970 | |
7ea7b4a1 AQ |
2971 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2972 | ttvn); | |
a73105b8 AQ |
2973 | |
2974 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2975 | kfree(orig_node->tt_buff); | |
2976 | orig_node->tt_buff_len = 0; | |
2977 | orig_node->tt_buff = NULL; | |
2978 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2979 | ||
7ea7b4a1 | 2980 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2981 | |
2982 | out: | |
2983 | if (orig_node) | |
5d967310 | 2984 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
2985 | } |
2986 | ||
56303d34 SE |
2987 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2988 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2989 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 2990 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2991 | { |
a513088d SE |
2992 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2993 | tt_num_changes, ttvn); | |
a73105b8 | 2994 | |
e8cf234a AQ |
2995 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2996 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2997 | atomic_set(&orig_node->last_ttvn, ttvn); |
2998 | } | |
2999 | ||
c018ad3d AQ |
3000 | /** |
3001 | * batadv_is_my_client - check if a client is served by the local node | |
3002 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 3003 | * @addr: the mac address of the client to check |
c018ad3d AQ |
3004 | * @vid: VLAN identifier |
3005 | * | |
62fe710f | 3006 | * Return: true if the client is served by this node, false otherwise. |
c018ad3d | 3007 | */ |
6b5e971a | 3008 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 3009 | unsigned short vid) |
a73105b8 | 3010 | { |
170173bf | 3011 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 3012 | bool ret = false; |
a73105b8 | 3013 | |
c018ad3d | 3014 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
3015 | if (!tt_local_entry) |
3016 | goto out; | |
058d0e26 | 3017 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
3018 | * consistency purpose) |
3019 | */ | |
7c1fd91d AQ |
3020 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
3021 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 3022 | goto out; |
7683fdc1 AQ |
3023 | ret = true; |
3024 | out: | |
a73105b8 | 3025 | if (tt_local_entry) |
a513088d | 3026 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 3027 | return ret; |
a73105b8 AQ |
3028 | } |
3029 | ||
335fbe0f ML |
3030 | /** |
3031 | * batadv_handle_tt_response - process incoming tt reply | |
3032 | * @bat_priv: the bat priv with all the soft interface information | |
3033 | * @tt_data: tt data containing the tt request information | |
3034 | * @resp_src: mac address of tt reply sender | |
3035 | * @num_entries: number of tt change entries appended to the tt data | |
3036 | */ | |
3037 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
3038 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 3039 | u8 *resp_src, u16 num_entries) |
a73105b8 | 3040 | { |
7c26a53b ML |
3041 | struct batadv_tt_req_node *node; |
3042 | struct hlist_node *safe; | |
56303d34 | 3043 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 3044 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
3045 | u8 *tvlv_ptr = (u8 *)tt_data; |
3046 | u16 change_offset; | |
a73105b8 | 3047 | |
39c75a51 | 3048 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3049 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 3050 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 3051 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3052 | |
335fbe0f | 3053 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3054 | if (!orig_node) |
3055 | goto out; | |
3056 | ||
a70a9aa9 AQ |
3057 | spin_lock_bh(&orig_node->tt_lock); |
3058 | ||
7ea7b4a1 AQ |
3059 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
3060 | change_offset *= ntohs(tt_data->num_vlan); | |
3061 | change_offset += sizeof(*tt_data); | |
3062 | tvlv_ptr += change_offset; | |
3063 | ||
3064 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 3065 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
3066 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3067 | resp_src, num_entries); | |
96412690 | 3068 | } else { |
335fbe0f ML |
3069 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3070 | tt_data->ttvn, tt_change); | |
96412690 | 3071 | } |
a73105b8 | 3072 | |
a70a9aa9 | 3073 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3074 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3075 | |
3076 | spin_unlock_bh(&orig_node->tt_lock); | |
3077 | ||
a73105b8 | 3078 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3079 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3080 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3081 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3082 | continue; |
7c26a53b | 3083 | hlist_del_init(&node->list); |
a73105b8 AQ |
3084 | kfree(node); |
3085 | } | |
7ea7b4a1 | 3086 | |
807736f6 | 3087 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3088 | out: |
3089 | if (orig_node) | |
5d967310 | 3090 | batadv_orig_node_put(orig_node); |
a73105b8 AQ |
3091 | } |
3092 | ||
56303d34 | 3093 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3094 | { |
56303d34 | 3095 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3096 | |
807736f6 | 3097 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3098 | |
807736f6 | 3099 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
3100 | list_del(&node->list); |
3101 | kfree(node); | |
3102 | } | |
3103 | ||
807736f6 | 3104 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3105 | } |
3106 | ||
56303d34 | 3107 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3108 | { |
56303d34 | 3109 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3110 | |
807736f6 SE |
3111 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3112 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3113 | if (!batadv_has_timed_out(node->first_time, |
3114 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3115 | continue; |
3116 | ||
3117 | list_del(&node->list); | |
3118 | kfree(node); | |
3119 | } | |
807736f6 | 3120 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3121 | } |
3122 | ||
62fe710f | 3123 | /** |
d15cd622 AQ |
3124 | * batadv_tt_check_roam_count - check if a client has roamed too frequently |
3125 | * @bat_priv: the bat priv with all the soft interface information | |
3126 | * @client: mac address of the roaming client | |
62fe710f SE |
3127 | * |
3128 | * This function checks whether the client already reached the | |
cc47f66e AQ |
3129 | * maximum number of possible roaming phases. In this case the ROAMING_ADV |
3130 | * will not be sent. | |
3131 | * | |
62fe710f | 3132 | * Return: true if the ROAMING_ADV can be sent, false otherwise |
9cfc7bd6 | 3133 | */ |
6b5e971a | 3134 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3135 | { |
56303d34 | 3136 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3137 | bool ret = false; |
3138 | ||
807736f6 | 3139 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3140 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3141 | * reply from the same orig_node yet |
3142 | */ | |
807736f6 | 3143 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3144 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3145 | continue; |
3146 | ||
1eda58bf | 3147 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3148 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3149 | continue; |
3150 | ||
3e34819e | 3151 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3152 | /* Sorry, you roamed too many times! */ |
3153 | goto unlock; | |
3154 | ret = true; | |
3155 | break; | |
3156 | } | |
3157 | ||
3158 | if (!ret) { | |
3159 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
3160 | if (!tt_roam_node) | |
3161 | goto unlock; | |
3162 | ||
3163 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3164 | atomic_set(&tt_roam_node->counter, |
3165 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3166 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3167 | |
807736f6 | 3168 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3169 | ret = true; |
3170 | } | |
3171 | ||
3172 | unlock: | |
807736f6 | 3173 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3174 | return ret; |
3175 | } | |
3176 | ||
c018ad3d AQ |
3177 | /** |
3178 | * batadv_send_roam_adv - send a roaming advertisement message | |
3179 | * @bat_priv: the bat priv with all the soft interface information | |
3180 | * @client: mac address of the roaming client | |
3181 | * @vid: VLAN identifier | |
3182 | * @orig_node: message destination | |
3183 | * | |
3184 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3185 | * client. This is done to inform the node that from now on all traffic destined | |
3186 | * for this particular roamed client has to be forwarded to the sender of the | |
3187 | * roaming message. | |
3188 | */ | |
6b5e971a | 3189 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3190 | unsigned short vid, |
56303d34 | 3191 | struct batadv_orig_node *orig_node) |
cc47f66e | 3192 | { |
56303d34 | 3193 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3194 | struct batadv_tvlv_roam_adv tvlv_roam; |
3195 | ||
3196 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3197 | if (!primary_if) | |
3198 | goto out; | |
cc47f66e AQ |
3199 | |
3200 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3201 | * already roamed to us too many times |
3202 | */ | |
a513088d | 3203 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3204 | goto out; |
3205 | ||
39c75a51 | 3206 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3207 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3208 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3209 | |
d69909d2 | 3210 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3211 | |
122edaa0 | 3212 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3213 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3214 | |
3215 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3216 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3217 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3218 | |
3219 | out: | |
122edaa0 | 3220 | if (primary_if) |
82047ad7 | 3221 | batadv_hardif_put(primary_if); |
a73105b8 AQ |
3222 | } |
3223 | ||
a513088d | 3224 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3225 | { |
56303d34 | 3226 | struct delayed_work *delayed_work; |
807736f6 | 3227 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3228 | struct batadv_priv *bat_priv; |
3229 | ||
3230 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3231 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3232 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3233 | |
a19d3d85 | 3234 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3235 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3236 | batadv_tt_req_purge(bat_priv); |
3237 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3238 | |
72414442 AQ |
3239 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3240 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3241 | } |
cc47f66e | 3242 | |
56303d34 | 3243 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3244 | { |
e1bf0c14 ML |
3245 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3246 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3247 | ||
807736f6 | 3248 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3249 | |
a513088d SE |
3250 | batadv_tt_local_table_free(bat_priv); |
3251 | batadv_tt_global_table_free(bat_priv); | |
3252 | batadv_tt_req_list_free(bat_priv); | |
3253 | batadv_tt_changes_list_free(bat_priv); | |
3254 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3255 | |
807736f6 | 3256 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3257 | } |
058d0e26 | 3258 | |
7ea7b4a1 AQ |
3259 | /** |
3260 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3261 | * table and possibly count them in the TT size | |
3262 | * @bat_priv: the bat priv with all the soft interface information | |
3263 | * @flags: the flag to switch | |
3264 | * @enable: whether to set or unset the flag | |
3265 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3266 | */ |
6b5e971a SE |
3267 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3268 | bool enable, bool count) | |
058d0e26 | 3269 | { |
7ea7b4a1 AQ |
3270 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3271 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 3272 | u16 changed_num = 0; |
058d0e26 | 3273 | struct hlist_head *head; |
6b5e971a | 3274 | u32 i; |
058d0e26 AQ |
3275 | |
3276 | if (!hash) | |
7ea7b4a1 | 3277 | return; |
058d0e26 AQ |
3278 | |
3279 | for (i = 0; i < hash->size; i++) { | |
3280 | head = &hash->table[i]; | |
3281 | ||
3282 | rcu_read_lock(); | |
b67bfe0d | 3283 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3284 | head, hash_entry) { |
697f2531 AQ |
3285 | if (enable) { |
3286 | if ((tt_common_entry->flags & flags) == flags) | |
3287 | continue; | |
3288 | tt_common_entry->flags |= flags; | |
3289 | } else { | |
3290 | if (!(tt_common_entry->flags & flags)) | |
3291 | continue; | |
3292 | tt_common_entry->flags &= ~flags; | |
3293 | } | |
3294 | changed_num++; | |
7ea7b4a1 AQ |
3295 | |
3296 | if (!count) | |
3297 | continue; | |
3298 | ||
3299 | batadv_tt_local_size_inc(bat_priv, | |
3300 | tt_common_entry->vid); | |
058d0e26 AQ |
3301 | } |
3302 | rcu_read_unlock(); | |
3303 | } | |
058d0e26 AQ |
3304 | } |
3305 | ||
acd34afa | 3306 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3307 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3308 | { |
807736f6 | 3309 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3310 | struct batadv_tt_common_entry *tt_common; |
3311 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 3312 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 3313 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3314 | struct hlist_head *head; |
3315 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3316 | u32 i; |
058d0e26 AQ |
3317 | |
3318 | if (!hash) | |
3319 | return; | |
3320 | ||
3321 | for (i = 0; i < hash->size; i++) { | |
3322 | head = &hash->table[i]; | |
3323 | list_lock = &hash->list_locks[i]; | |
3324 | ||
3325 | spin_lock_bh(list_lock); | |
b67bfe0d | 3326 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3327 | hash_entry) { |
3328 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3329 | continue; |
3330 | ||
39c75a51 | 3331 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3332 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3333 | tt_common->addr, | |
3334 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3335 | |
7ea7b4a1 | 3336 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3337 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3338 | tt_local = container_of(tt_common, |
3339 | struct batadv_tt_local_entry, | |
3340 | common); | |
35df3b29 AQ |
3341 | |
3342 | /* decrease the reference held for this vlan */ | |
3343 | vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid); | |
354136bc | 3344 | if (vlan) { |
9c3bf081 SE |
3345 | batadv_softif_vlan_put(vlan); |
3346 | batadv_softif_vlan_put(vlan); | |
354136bc | 3347 | } |
35df3b29 | 3348 | |
56303d34 | 3349 | batadv_tt_local_entry_free_ref(tt_local); |
058d0e26 AQ |
3350 | } |
3351 | spin_unlock_bh(list_lock); | |
3352 | } | |
058d0e26 AQ |
3353 | } |
3354 | ||
e1bf0c14 | 3355 | /** |
a19d3d85 ML |
3356 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3357 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3358 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3359 | * |
3360 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3361 | */ |
a19d3d85 | 3362 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3363 | { |
5274cd68 SE |
3364 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3365 | ||
c5caf4ef LL |
3366 | /* Update multicast addresses in local translation table */ |
3367 | batadv_mcast_mla_update(bat_priv); | |
3368 | ||
e1bf0c14 ML |
3369 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3370 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3371 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3372 | return; |
e1bf0c14 | 3373 | } |
be9aa4c1 | 3374 | |
7ea7b4a1 | 3375 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3376 | |
a513088d | 3377 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3378 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3379 | |
3380 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3381 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3382 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3383 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3384 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3385 | |
3386 | /* reset the sending counter */ | |
807736f6 | 3387 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3388 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3389 | } |
a70a9aa9 | 3390 | |
a19d3d85 ML |
3391 | /** |
3392 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3393 | * have been queued in the time since the last commit | |
3394 | * @bat_priv: the bat priv with all the soft interface information | |
3395 | */ | |
3396 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3397 | { | |
3398 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3399 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3400 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3401 | } |
59b699cd | 3402 | |
6b5e971a SE |
3403 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3404 | unsigned short vid) | |
59b699cd | 3405 | { |
56303d34 SE |
3406 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3407 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3408 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3409 | bool ret = false; |
59b699cd | 3410 | |
b8cbd81d | 3411 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3412 | if (!vlan) |
3413 | return false; | |
3414 | ||
3415 | if (!atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3416 | goto out; |
59b699cd | 3417 | |
b8cbd81d | 3418 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3419 | if (!tt_local_entry) |
3420 | goto out; | |
3421 | ||
b8cbd81d | 3422 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3423 | if (!tt_global_entry) |
3424 | goto out; | |
3425 | ||
1f129fef | 3426 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3427 | goto out; |
3428 | ||
5870adc6 | 3429 | ret = true; |
59b699cd AQ |
3430 | |
3431 | out: | |
9c3bf081 | 3432 | batadv_softif_vlan_put(vlan); |
59b699cd | 3433 | if (tt_global_entry) |
a513088d | 3434 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3435 | if (tt_local_entry) |
a513088d | 3436 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3437 | return ret; |
3438 | } | |
a943cac1 | 3439 | |
e1bf0c14 ML |
3440 | /** |
3441 | * batadv_tt_update_orig - update global translation table with new tt | |
3442 | * information received via ogms | |
3443 | * @bat_priv: the bat priv with all the soft interface information | |
e51f0397 SE |
3444 | * @orig_node: the orig_node of the ogm |
3445 | * @tt_buff: pointer to the first tvlv VLAN entry | |
7ea7b4a1 AQ |
3446 | * @tt_num_vlan: number of tvlv VLAN entries |
3447 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3448 | * @tt_num_changes: number of tt changes inside the tt buffer |
3449 | * @ttvn: translation table version number of this changeset | |
e1bf0c14 ML |
3450 | */ |
3451 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3452 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3453 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3454 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3455 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3456 | { |
6b5e971a | 3457 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3458 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3459 | bool full_table = true; |
e17931d1 | 3460 | bool has_tt_init; |
a943cac1 | 3461 | |
7ea7b4a1 | 3462 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3463 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3464 | &orig_node->capa_initialized); | |
e17931d1 | 3465 | |
17071578 | 3466 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3467 | * increased by one -> we can apply the attached changes |
3468 | */ | |
e17931d1 | 3469 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3470 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3471 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3472 | * times. | |
9cfc7bd6 SE |
3473 | * In this case send a tt request |
3474 | */ | |
a943cac1 ML |
3475 | if (!tt_num_changes) { |
3476 | full_table = false; | |
3477 | goto request_table; | |
3478 | } | |
3479 | ||
a70a9aa9 AQ |
3480 | spin_lock_bh(&orig_node->tt_lock); |
3481 | ||
a513088d | 3482 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3483 | ttvn, tt_change); |
a943cac1 ML |
3484 | |
3485 | /* Even if we received the precomputed crc with the OGM, we | |
3486 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3487 | * in the global table |
3488 | */ | |
7ea7b4a1 | 3489 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3490 | |
a70a9aa9 AQ |
3491 | spin_unlock_bh(&orig_node->tt_lock); |
3492 | ||
a943cac1 ML |
3493 | /* The ttvn alone is not enough to guarantee consistency |
3494 | * because a single value could represent different states | |
3495 | * (due to the wrap around). Thus a node has to check whether | |
3496 | * the resulting table (after applying the changes) is still | |
3497 | * consistent or not. E.g. a node could disconnect while its | |
3498 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3499 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3500 | * inconsistency |
3501 | */ | |
7ea7b4a1 AQ |
3502 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3503 | tt_num_vlan)) | |
a943cac1 | 3504 | goto request_table; |
a943cac1 ML |
3505 | } else { |
3506 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3507 | * in sync anymore -> request fresh tt data |
3508 | */ | |
e17931d1 | 3509 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3510 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3511 | tt_num_vlan)) { | |
a943cac1 | 3512 | request_table: |
39c75a51 | 3513 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3514 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3515 | orig_node->orig, ttvn, orig_ttvn, | |
3516 | tt_num_changes); | |
a513088d | 3517 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3518 | tt_vlan, tt_num_vlan, |
3519 | full_table); | |
a943cac1 ML |
3520 | return; |
3521 | } | |
3522 | } | |
3523 | } | |
3275e7cc | 3524 | |
c018ad3d AQ |
3525 | /** |
3526 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3527 | * @bat_priv: the bat priv with all the soft interface information | |
3528 | * @addr: the mac address of the client to check | |
3529 | * @vid: VLAN identifier | |
3530 | * | |
62fe710f | 3531 | * Return: true if we know that the client has moved from its old originator |
c018ad3d AQ |
3532 | * to another one. This entry is still kept for consistency purposes and will be |
3533 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3534 | */ |
56303d34 | 3535 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 3536 | u8 *addr, unsigned short vid) |
3275e7cc | 3537 | { |
56303d34 | 3538 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3539 | bool ret = false; |
3540 | ||
c018ad3d | 3541 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3542 | if (!tt_global_entry) |
3543 | goto out; | |
3544 | ||
c1d07431 | 3545 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3546 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3547 | out: |
3548 | return ret; | |
3549 | } | |
30cfd02b | 3550 | |
7c1fd91d AQ |
3551 | /** |
3552 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3553 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3554 | * @addr: the mac address of the local client to query |
3555 | * @vid: VLAN identifier | |
7c1fd91d | 3556 | * |
62fe710f | 3557 | * Return: true if the local client is known to be roaming (it is not served by |
7c1fd91d AQ |
3558 | * this node anymore) or not. If yes, the client is still present in the table |
3559 | * to keep the latter consistent with the node TTVN | |
3560 | */ | |
3561 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 3562 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
3563 | { |
3564 | struct batadv_tt_local_entry *tt_local_entry; | |
3565 | bool ret = false; | |
3566 | ||
c018ad3d | 3567 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3568 | if (!tt_local_entry) |
3569 | goto out; | |
3570 | ||
3571 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3572 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3573 | out: | |
3574 | return ret; | |
7c1fd91d AQ |
3575 | } |
3576 | ||
30cfd02b AQ |
3577 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3578 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3579 | const unsigned char *addr, |
16052789 | 3580 | unsigned short vid) |
30cfd02b AQ |
3581 | { |
3582 | bool ret = false; | |
3583 | ||
16052789 | 3584 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3585 | BATADV_TT_CLIENT_TEMP, |
3586 | atomic_read(&orig_node->last_ttvn))) | |
3587 | goto out; | |
3588 | ||
3589 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3590 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3591 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3592 | ret = true; |
3593 | out: | |
3594 | return ret; | |
3595 | } | |
e1bf0c14 | 3596 | |
a19d3d85 ML |
3597 | /** |
3598 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3599 | * maximum packet size that can be transported through the mesh | |
3600 | * @soft_iface: netdev struct of the mesh interface | |
3601 | * | |
3602 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3603 | * to be removed. | |
3604 | */ | |
3605 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3606 | { | |
3607 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3608 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3609 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3610 | bool reduced = false; | |
3611 | ||
3612 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3613 | ||
3614 | while (true) { | |
3615 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3616 | if (packet_size_max >= table_size) | |
3617 | break; | |
3618 | ||
3619 | batadv_tt_local_purge(bat_priv, timeout); | |
3620 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3621 | ||
3622 | timeout /= 2; | |
3623 | reduced = true; | |
3624 | net_ratelimited_function(batadv_info, soft_iface, | |
3625 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3626 | packet_size_max); | |
3627 | } | |
3628 | ||
3629 | /* commit these changes immediately, to avoid synchronization problem | |
3630 | * with the TTVN | |
3631 | */ | |
3632 | if (reduced) | |
3633 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3634 | ||
3635 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3636 | } | |
3637 | ||
e1bf0c14 ML |
3638 | /** |
3639 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3640 | * @bat_priv: the bat priv with all the soft interface information | |
3641 | * @orig: the orig_node of the ogm | |
3642 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3643 | * @tvlv_value: tvlv buffer containing the gateway data | |
3644 | * @tvlv_value_len: tvlv buffer length | |
3645 | */ | |
3646 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3647 | struct batadv_orig_node *orig, | |
6b5e971a SE |
3648 | u8 flags, void *tvlv_value, |
3649 | u16 tvlv_value_len) | |
e1bf0c14 | 3650 | { |
7ea7b4a1 AQ |
3651 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3652 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3653 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 3654 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
3655 | |
3656 | if (tvlv_value_len < sizeof(*tt_data)) | |
3657 | return; | |
3658 | ||
3659 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3660 | tvlv_value_len -= sizeof(*tt_data); | |
3661 | ||
7ea7b4a1 AQ |
3662 | num_vlan = ntohs(tt_data->num_vlan); |
3663 | ||
3664 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3665 | return; | |
3666 | ||
3667 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3668 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3669 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3670 | ||
298e6e68 | 3671 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3672 | |
7ea7b4a1 AQ |
3673 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3674 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3675 | } |
3676 | ||
335fbe0f ML |
3677 | /** |
3678 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3679 | * container | |
3680 | * @bat_priv: the bat priv with all the soft interface information | |
3681 | * @src: mac address of tt tvlv sender | |
3682 | * @dst: mac address of tt tvlv recipient | |
3683 | * @tvlv_value: tvlv buffer containing the tt data | |
3684 | * @tvlv_value_len: tvlv buffer length | |
3685 | * | |
62fe710f | 3686 | * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS |
335fbe0f ML |
3687 | * otherwise. |
3688 | */ | |
3689 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3690 | u8 *src, u8 *dst, |
335fbe0f | 3691 | void *tvlv_value, |
6b5e971a | 3692 | u16 tvlv_value_len) |
335fbe0f ML |
3693 | { |
3694 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 3695 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3696 | char tt_flag; |
3697 | bool ret; | |
3698 | ||
3699 | if (tvlv_value_len < sizeof(*tt_data)) | |
3700 | return NET_RX_SUCCESS; | |
3701 | ||
3702 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3703 | tvlv_value_len -= sizeof(*tt_data); | |
3704 | ||
7ea7b4a1 AQ |
3705 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3706 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3707 | ||
3708 | if (tvlv_value_len < tt_vlan_len) | |
3709 | return NET_RX_SUCCESS; | |
3710 | ||
3711 | tvlv_value_len -= tt_vlan_len; | |
3712 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3713 | |
3714 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3715 | case BATADV_TT_REQUEST: | |
3716 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3717 | ||
3718 | /* If this node cannot provide a TT response the tt_request is | |
3719 | * forwarded | |
3720 | */ | |
3721 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3722 | if (!ret) { | |
3723 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3724 | tt_flag = 'F'; | |
3725 | else | |
3726 | tt_flag = '.'; | |
3727 | ||
3728 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3729 | "Routing TT_REQUEST to %pM [%c]\n", | |
3730 | dst, tt_flag); | |
3731 | /* tvlv API will re-route the packet */ | |
3732 | return NET_RX_DROP; | |
3733 | } | |
3734 | break; | |
3735 | case BATADV_TT_RESPONSE: | |
3736 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3737 | ||
3738 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3739 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3740 | src, tt_num_entries); |
335fbe0f ML |
3741 | return NET_RX_SUCCESS; |
3742 | } | |
3743 | ||
3744 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3745 | tt_flag = 'F'; | |
3746 | else | |
3747 | tt_flag = '.'; | |
3748 | ||
3749 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3750 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3751 | ||
3752 | /* tvlv API will re-route the packet */ | |
3753 | return NET_RX_DROP; | |
3754 | } | |
3755 | ||
3756 | return NET_RX_SUCCESS; | |
3757 | } | |
3758 | ||
122edaa0 ML |
3759 | /** |
3760 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3761 | * @bat_priv: the bat priv with all the soft interface information | |
3762 | * @src: mac address of tt tvlv sender | |
3763 | * @dst: mac address of tt tvlv recipient | |
3764 | * @tvlv_value: tvlv buffer containing the tt data | |
3765 | * @tvlv_value_len: tvlv buffer length | |
3766 | * | |
62fe710f | 3767 | * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS |
122edaa0 ML |
3768 | * otherwise. |
3769 | */ | |
3770 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3771 | u8 *src, u8 *dst, |
122edaa0 | 3772 | void *tvlv_value, |
6b5e971a | 3773 | u16 tvlv_value_len) |
122edaa0 ML |
3774 | { |
3775 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3776 | struct batadv_orig_node *orig_node = NULL; | |
3777 | ||
3778 | /* If this node is not the intended recipient of the | |
3779 | * roaming advertisement the packet is forwarded | |
3780 | * (the tvlv API will re-route the packet). | |
3781 | */ | |
3782 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3783 | return NET_RX_DROP; | |
3784 | ||
122edaa0 ML |
3785 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3786 | goto out; | |
3787 | ||
3788 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3789 | if (!orig_node) | |
3790 | goto out; | |
3791 | ||
3792 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3793 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3794 | ||
3795 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3796 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3797 | src, roaming_adv->client); | |
3798 | ||
3799 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3800 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3801 | atomic_read(&orig_node->last_ttvn) + 1); |
3802 | ||
3803 | out: | |
3804 | if (orig_node) | |
5d967310 | 3805 | batadv_orig_node_put(orig_node); |
122edaa0 ML |
3806 | return NET_RX_SUCCESS; |
3807 | } | |
3808 | ||
e1bf0c14 ML |
3809 | /** |
3810 | * batadv_tt_init - initialise the translation table internals | |
3811 | * @bat_priv: the bat priv with all the soft interface information | |
3812 | * | |
62fe710f | 3813 | * Return: 0 on success or negative error number in case of failure. |
e1bf0c14 ML |
3814 | */ |
3815 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3816 | { | |
3817 | int ret; | |
3818 | ||
0eb01568 AQ |
3819 | /* synchronized flags must be remote */ |
3820 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3821 | ||
e1bf0c14 ML |
3822 | ret = batadv_tt_local_init(bat_priv); |
3823 | if (ret < 0) | |
3824 | return ret; | |
3825 | ||
3826 | ret = batadv_tt_global_init(bat_priv); | |
3827 | if (ret < 0) | |
3828 | return ret; | |
3829 | ||
3830 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3831 | batadv_tt_tvlv_unicast_handler_v1, |
3832 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3833 | |
122edaa0 ML |
3834 | batadv_tvlv_handler_register(bat_priv, NULL, |
3835 | batadv_roam_tvlv_unicast_handler_v1, | |
3836 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3837 | ||
e1bf0c14 ML |
3838 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3839 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3840 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3841 | ||
3842 | return 1; | |
3843 | } | |
42cb0bef AQ |
3844 | |
3845 | /** | |
3846 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3847 | * @bat_priv: the bat priv with all the soft interface information | |
3848 | * @addr: the mac address of the client | |
3849 | * @vid: the identifier of the VLAN where this client is connected | |
3850 | * | |
62fe710f | 3851 | * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false |
42cb0bef AQ |
3852 | * otherwise |
3853 | */ | |
3854 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 3855 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
3856 | { |
3857 | struct batadv_tt_global_entry *tt; | |
3858 | bool ret; | |
3859 | ||
3860 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3861 | if (!tt) | |
3862 | return false; | |
3863 | ||
3864 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3865 | ||
3866 | batadv_tt_global_entry_free_ref(tt); | |
3867 | ||
3868 | return ret; | |
3869 | } |