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9f6446c7 | 1 | /* Copyright (C) 2007-2015 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> | |
34 | #include <linux/list.h> | |
35 | #include <linux/lockdep.h> | |
36 | #include <linux/netdevice.h> | |
37 | #include <linux/rculist.h> | |
38 | #include <linux/rcupdate.h> | |
39 | #include <linux/seq_file.h> | |
40 | #include <linux/slab.h> | |
41 | #include <linux/spinlock.h> | |
42 | #include <linux/stddef.h> | |
43 | #include <linux/string.h> | |
44 | #include <linux/workqueue.h> | |
45 | #include <net/net_namespace.h> | |
46 | ||
47 | #include "bridge_loop_avoidance.h" | |
32ae9b22 | 48 | #include "hard-interface.h" |
c6c8fea2 | 49 | #include "hash.h" |
c5caf4ef | 50 | #include "multicast.h" |
1e2c2a4f SE |
51 | #include "originator.h" |
52 | #include "packet.h" | |
53 | #include "soft-interface.h" | |
a73105b8 | 54 | |
dec05074 AQ |
55 | /* hash class keys */ |
56 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
57 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
58 | ||
6b5e971a | 59 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 60 | unsigned short vid, |
56303d34 | 61 | struct batadv_orig_node *orig_node); |
a513088d SE |
62 | static void batadv_tt_purge(struct work_struct *work); |
63 | static void | |
56303d34 | 64 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
65 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
66 | struct batadv_orig_node *orig_node, | |
67 | const unsigned char *addr, | |
c018ad3d AQ |
68 | unsigned short vid, const char *message, |
69 | bool roaming); | |
c6c8fea2 | 70 | |
4c718958 | 71 | /* returns 1 if they are the same mac addr and vid */ |
a513088d | 72 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 73 | { |
56303d34 | 74 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 75 | hash_entry); |
4c718958 ML |
76 | const struct batadv_tt_common_entry *tt1 = data1; |
77 | const struct batadv_tt_common_entry *tt2 = data2; | |
7aadf889 | 78 | |
4c718958 | 79 | return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2); |
7aadf889 ML |
80 | } |
81 | ||
c018ad3d AQ |
82 | /** |
83 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
84 | * @data: pointer to the tt_common_entry object to map | |
85 | * @size: the size of the hash table | |
86 | * | |
87 | * Returns the hash index where the object represented by 'data' should be | |
88 | * stored at. | |
89 | */ | |
6b5e971a | 90 | static inline u32 batadv_choose_tt(const void *data, u32 size) |
c018ad3d AQ |
91 | { |
92 | struct batadv_tt_common_entry *tt; | |
6b5e971a | 93 | u32 hash = 0; |
c018ad3d AQ |
94 | |
95 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
96 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
97 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
98 | |
99 | return hash % size; | |
100 | } | |
101 | ||
102 | /** | |
103 | * batadv_tt_hash_find - look for a client in the given hash table | |
104 | * @hash: the hash table to search | |
105 | * @addr: the mac address of the client to look for | |
106 | * @vid: VLAN identifier | |
107 | * | |
108 | * Returns a pointer to the tt_common struct belonging to the searched client if | |
109 | * found, NULL otherwise. | |
110 | */ | |
56303d34 | 111 | static struct batadv_tt_common_entry * |
6b5e971a | 112 | batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr, |
c018ad3d | 113 | unsigned short vid) |
7aadf889 | 114 | { |
7aadf889 | 115 | struct hlist_head *head; |
c018ad3d | 116 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
6b5e971a | 117 | u32 index; |
7aadf889 ML |
118 | |
119 | if (!hash) | |
120 | return NULL; | |
121 | ||
8fdd0153 | 122 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
123 | to_search.vid = vid; |
124 | ||
125 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
126 | head = &hash->table[index]; |
127 | ||
128 | rcu_read_lock(); | |
c018ad3d AQ |
129 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
130 | if (!batadv_compare_eth(tt, addr)) | |
131 | continue; | |
132 | ||
133 | if (tt->vid != vid) | |
7aadf889 ML |
134 | continue; |
135 | ||
c018ad3d | 136 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
137 | continue; |
138 | ||
c018ad3d | 139 | tt_tmp = tt; |
7aadf889 ML |
140 | break; |
141 | } | |
142 | rcu_read_unlock(); | |
143 | ||
c018ad3d | 144 | return tt_tmp; |
7aadf889 ML |
145 | } |
146 | ||
c018ad3d AQ |
147 | /** |
148 | * batadv_tt_local_hash_find - search the local table for a given client | |
149 | * @bat_priv: the bat priv with all the soft interface information | |
150 | * @addr: the mac address of the client to look for | |
151 | * @vid: VLAN identifier | |
152 | * | |
153 | * Returns a pointer to the corresponding tt_local_entry struct if the client is | |
154 | * found, NULL otherwise. | |
155 | */ | |
56303d34 | 156 | static struct batadv_tt_local_entry * |
6b5e971a | 157 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 158 | unsigned short vid) |
7aadf889 | 159 | { |
56303d34 SE |
160 | struct batadv_tt_common_entry *tt_common_entry; |
161 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 162 | |
c018ad3d AQ |
163 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
164 | vid); | |
48100bac AQ |
165 | if (tt_common_entry) |
166 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
167 | struct batadv_tt_local_entry, |
168 | common); | |
48100bac AQ |
169 | return tt_local_entry; |
170 | } | |
7aadf889 | 171 | |
c018ad3d AQ |
172 | /** |
173 | * batadv_tt_global_hash_find - search the global table for a given client | |
174 | * @bat_priv: the bat priv with all the soft interface information | |
175 | * @addr: the mac address of the client to look for | |
176 | * @vid: VLAN identifier | |
177 | * | |
178 | * Returns a pointer to the corresponding tt_global_entry struct if the client | |
179 | * is found, NULL otherwise. | |
180 | */ | |
56303d34 | 181 | static struct batadv_tt_global_entry * |
6b5e971a | 182 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 183 | unsigned short vid) |
48100bac | 184 | { |
56303d34 SE |
185 | struct batadv_tt_common_entry *tt_common_entry; |
186 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 187 | |
c018ad3d AQ |
188 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
189 | vid); | |
48100bac AQ |
190 | if (tt_common_entry) |
191 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
192 | struct batadv_tt_global_entry, |
193 | common); | |
48100bac | 194 | return tt_global_entry; |
7aadf889 ML |
195 | } |
196 | ||
a513088d | 197 | static void |
56303d34 | 198 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 199 | { |
48100bac AQ |
200 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
201 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
202 | } |
203 | ||
21026059 AQ |
204 | /** |
205 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
206 | * tt_global_entry and possibly free it | |
207 | * @tt_global_entry: the object to free | |
208 | */ | |
a513088d | 209 | static void |
56303d34 | 210 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 211 | { |
db08e6e5 | 212 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 213 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 214 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
215 | } |
216 | } | |
217 | ||
1d8ab8d3 LL |
218 | /** |
219 | * batadv_tt_global_hash_count - count the number of orig entries | |
220 | * @hash: hash table containing the tt entries | |
221 | * @addr: the mac address of the client to count entries for | |
222 | * @vid: VLAN identifier | |
223 | * | |
224 | * Return the number of originators advertising the given address/data | |
225 | * (excluding ourself). | |
226 | */ | |
227 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 228 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
229 | { |
230 | struct batadv_tt_global_entry *tt_global_entry; | |
231 | int count; | |
232 | ||
233 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
234 | if (!tt_global_entry) | |
235 | return 0; | |
236 | ||
237 | count = atomic_read(&tt_global_entry->orig_list_count); | |
238 | batadv_tt_global_entry_free_ref(tt_global_entry); | |
239 | ||
240 | return count; | |
241 | } | |
242 | ||
a513088d | 243 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 244 | { |
56303d34 | 245 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 246 | |
56303d34 | 247 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
248 | |
249 | /* We are in an rcu callback here, therefore we cannot use | |
250 | * batadv_orig_node_free_ref() and its call_rcu(): | |
251 | * An rcu_barrier() wouldn't wait for that to finish | |
252 | */ | |
253 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
254 | kfree(orig_entry); |
255 | } | |
256 | ||
7ea7b4a1 AQ |
257 | /** |
258 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
259 | * by vid | |
260 | * @bat_priv: the bat priv with all the soft interface information | |
261 | * @vid: the VLAN identifier of the sub-table to change | |
262 | * @v: the amount to sum to the local table size | |
263 | */ | |
264 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
265 | unsigned short vid, int v) | |
266 | { | |
267 | struct batadv_softif_vlan *vlan; | |
268 | ||
269 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
270 | if (!vlan) | |
271 | return; | |
272 | ||
273 | atomic_add(v, &vlan->tt.num_entries); | |
274 | ||
275 | batadv_softif_vlan_free_ref(vlan); | |
276 | } | |
277 | ||
278 | /** | |
279 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
280 | * vid | |
281 | * @bat_priv: the bat priv with all the soft interface information | |
282 | * @vid: the VLAN identifier | |
283 | */ | |
284 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
285 | unsigned short vid) | |
286 | { | |
287 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
288 | } | |
289 | ||
290 | /** | |
291 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
292 | * vid | |
293 | * @bat_priv: the bat priv with all the soft interface information | |
294 | * @vid: the VLAN identifier | |
295 | */ | |
296 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
297 | unsigned short vid) | |
298 | { | |
299 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
300 | } | |
301 | ||
302 | /** | |
303 | * batadv_tt_global_size_mod - change the size by v of the local table | |
304 | * identified by vid | |
305 | * @bat_priv: the bat priv with all the soft interface information | |
306 | * @vid: the VLAN identifier | |
307 | * @v: the amount to sum to the global table size | |
308 | */ | |
309 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
310 | unsigned short vid, int v) | |
311 | { | |
312 | struct batadv_orig_node_vlan *vlan; | |
313 | ||
314 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
315 | if (!vlan) | |
316 | return; | |
317 | ||
318 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
319 | spin_lock_bh(&orig_node->vlan_list_lock); | |
a121048a | 320 | hlist_del_init_rcu(&vlan->list); |
7ea7b4a1 AQ |
321 | spin_unlock_bh(&orig_node->vlan_list_lock); |
322 | batadv_orig_node_vlan_free_ref(vlan); | |
323 | } | |
324 | ||
325 | batadv_orig_node_vlan_free_ref(vlan); | |
326 | } | |
327 | ||
328 | /** | |
329 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
330 | * given vid | |
331 | * @orig_node: the originator which global table size has to be decreased | |
332 | * @vid: the vlan identifier | |
333 | */ | |
334 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
335 | unsigned short vid) | |
336 | { | |
337 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
338 | } | |
339 | ||
340 | /** | |
341 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
342 | * given vid | |
343 | * @orig_node: the originator which global table size has to be decreased | |
344 | * @vid: the vlan identifier | |
345 | */ | |
346 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
347 | unsigned short vid) | |
348 | { | |
349 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
350 | } | |
351 | ||
a513088d | 352 | static void |
56303d34 | 353 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 354 | { |
d657e621 AQ |
355 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
356 | return; | |
7ea7b4a1 | 357 | |
a513088d | 358 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
359 | } |
360 | ||
3abe4adb AQ |
361 | /** |
362 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
363 | * @bat_priv: the bat priv with all the soft interface information | |
364 | * @tt_local_entry: the TT entry involved in the event | |
365 | * @event_flags: flags to store in the event structure | |
366 | */ | |
56303d34 | 367 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 368 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 369 | u8 event_flags) |
a73105b8 | 370 | { |
56303d34 | 371 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 372 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 373 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
374 | bool event_removed = false; |
375 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
376 | |
377 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
378 | if (!tt_change_node) |
379 | return; | |
380 | ||
ff66c975 | 381 | tt_change_node->change.flags = flags; |
ca663046 AQ |
382 | memset(tt_change_node->change.reserved, 0, |
383 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 384 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 385 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 386 | |
acd34afa | 387 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
388 | |
389 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
390 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
391 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 392 | list) { |
3abe4adb | 393 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
394 | continue; |
395 | ||
396 | /* DEL+ADD in the same orig interval have no effect and can be | |
397 | * removed to avoid silly behaviour on the receiver side. The | |
398 | * other way around (ADD+DEL) can happen in case of roaming of | |
399 | * a client still in the NEW state. Roaming of NEW clients is | |
400 | * now possible due to automatically recognition of "temporary" | |
401 | * clients | |
402 | */ | |
acd34afa | 403 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
404 | if (!del_op_requested && del_op_entry) |
405 | goto del; | |
406 | if (del_op_requested && !del_op_entry) | |
407 | goto del; | |
3c4f7ab6 AQ |
408 | |
409 | /* this is a second add in the same originator interval. It | |
410 | * means that flags have been changed: update them! | |
411 | */ | |
412 | if (!del_op_requested && !del_op_entry) | |
413 | entry->change.flags = flags; | |
414 | ||
3b643de5 AQ |
415 | continue; |
416 | del: | |
417 | list_del(&entry->list); | |
418 | kfree(entry); | |
155e4e12 | 419 | kfree(tt_change_node); |
3b643de5 AQ |
420 | event_removed = true; |
421 | goto unlock; | |
422 | } | |
423 | ||
a73105b8 | 424 | /* track the change in the OGMinterval list */ |
807736f6 | 425 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
426 | |
427 | unlock: | |
807736f6 | 428 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 429 | |
3b643de5 | 430 | if (event_removed) |
807736f6 | 431 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 432 | else |
807736f6 | 433 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
434 | } |
435 | ||
335fbe0f ML |
436 | /** |
437 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
438 | * @changes_num: number of tt changes | |
439 | * | |
440 | * Returns computed length in bytes. | |
441 | */ | |
442 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 443 | { |
335fbe0f | 444 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
445 | } |
446 | ||
298e6e68 AQ |
447 | /** |
448 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
449 | * @tt_len: available space | |
450 | * | |
451 | * Returns the number of entries. | |
452 | */ | |
6b5e971a | 453 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
454 | { |
455 | return tt_len / batadv_tt_len(1); | |
456 | } | |
457 | ||
a19d3d85 ML |
458 | /** |
459 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
460 | * size when transmitted over the air | |
461 | * @bat_priv: the bat priv with all the soft interface information | |
462 | * | |
463 | * Returns local translation table size in bytes. | |
464 | */ | |
465 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
466 | { | |
4f248cff SE |
467 | u16 num_vlan = 0; |
468 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
469 | struct batadv_softif_vlan *vlan; |
470 | int hdr_size; | |
471 | ||
472 | rcu_read_lock(); | |
473 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
474 | num_vlan++; | |
475 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
476 | } | |
477 | rcu_read_unlock(); | |
478 | ||
479 | /* header size of tvlv encapsulated tt response payload */ | |
480 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
481 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
482 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
483 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
484 | ||
485 | return hdr_size + batadv_tt_len(tt_local_entries); | |
486 | } | |
487 | ||
56303d34 | 488 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 489 | { |
807736f6 | 490 | if (bat_priv->tt.local_hash) |
5346c35e | 491 | return 0; |
c6c8fea2 | 492 | |
807736f6 | 493 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 494 | |
807736f6 | 495 | if (!bat_priv->tt.local_hash) |
5346c35e | 496 | return -ENOMEM; |
c6c8fea2 | 497 | |
dec05074 AQ |
498 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
499 | &batadv_tt_local_hash_lock_class_key); | |
500 | ||
5346c35e | 501 | return 0; |
c6c8fea2 SE |
502 | } |
503 | ||
068ee6e2 AQ |
504 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
505 | struct batadv_tt_global_entry *tt_global, | |
506 | const char *message) | |
507 | { | |
508 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
509 | "Deleting global tt entry %pM (vid: %d): %s\n", |
510 | tt_global->common.addr, | |
511 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
512 | |
513 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 514 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 515 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
516 | } |
517 | ||
c018ad3d AQ |
518 | /** |
519 | * batadv_tt_local_add - add a new client to the local table or update an | |
520 | * existing client | |
521 | * @soft_iface: netdev struct of the mesh interface | |
522 | * @addr: the mac address of the client to add | |
523 | * @vid: VLAN identifier | |
524 | * @ifindex: index of the interface where the client is connected to (useful to | |
525 | * identify wireless clients) | |
9464d071 AQ |
526 | * @mark: the value contained in the skb->mark field of the received packet (if |
527 | * any) | |
a19d3d85 ML |
528 | * |
529 | * Returns true if the client was successfully added, false otherwise. | |
c018ad3d | 530 | */ |
6b5e971a SE |
531 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
532 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 533 | { |
56303d34 | 534 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 535 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 536 | struct batadv_tt_global_entry *tt_global = NULL; |
35df3b29 | 537 | struct batadv_softif_vlan *vlan; |
0c69aecc | 538 | struct net_device *in_dev = NULL; |
db08e6e5 | 539 | struct hlist_head *head; |
56303d34 | 540 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 541 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
542 | bool ret = false; |
543 | bool roamed_back = false; | |
6b5e971a SE |
544 | u8 remote_flags; |
545 | u32 match_mark; | |
c6c8fea2 | 546 | |
0c69aecc AQ |
547 | if (ifindex != BATADV_NULL_IFINDEX) |
548 | in_dev = dev_get_by_index(&init_net, ifindex); | |
549 | ||
c018ad3d | 550 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
551 | |
552 | if (!is_multicast_ether_addr(addr)) | |
553 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 554 | |
47c94655 AQ |
555 | if (tt_local) { |
556 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
557 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
558 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
559 | "Re-adding pending client %pM (vid: %d)\n", |
560 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
561 | /* whatever the reason why the PENDING flag was set, |
562 | * this is a client which was enqueued to be removed in | |
563 | * this orig_interval. Since it popped up again, the | |
564 | * flag can be reset like it was never enqueued | |
565 | */ | |
566 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
567 | goto add_event; | |
568 | } | |
569 | ||
570 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
571 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
572 | "Roaming client %pM (vid: %d) came back to its original location\n", |
573 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
574 | /* the ROAM flag is set because this client roamed away |
575 | * and the node got a roaming_advertisement message. Now | |
576 | * that the client popped up again at its original | |
577 | * location such flag can be unset | |
578 | */ | |
579 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
580 | roamed_back = true; | |
581 | } | |
582 | goto check_roaming; | |
c6c8fea2 SE |
583 | } |
584 | ||
a19d3d85 ML |
585 | /* Ignore the client if we cannot send it in a full table response. */ |
586 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
587 | table_size += batadv_tt_len(1); | |
588 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
589 | if (table_size > packet_size_max) { | |
590 | net_ratelimited_function(batadv_info, soft_iface, | |
591 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
592 | table_size, packet_size_max, addr); | |
593 | goto out; | |
594 | } | |
595 | ||
47c94655 AQ |
596 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
597 | if (!tt_local) | |
7683fdc1 | 598 | goto out; |
a73105b8 | 599 | |
35df3b29 AQ |
600 | /* increase the refcounter of the related vlan */ |
601 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc | 602 | if (WARN(!vlan, "adding TT local entry %pM to non-existent VLAN %d", |
fd7dec25 SE |
603 | addr, BATADV_PRINT_VID(vid))) { |
604 | kfree(tt_local); | |
605 | tt_local = NULL; | |
354136bc | 606 | goto out; |
fd7dec25 | 607 | } |
35df3b29 | 608 | |
39c75a51 | 609 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
610 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
611 | addr, BATADV_PRINT_VID(vid), | |
6b5e971a | 612 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 613 | |
8fdd0153 | 614 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
615 | /* The local entry has to be marked as NEW to avoid to send it in |
616 | * a full table response going out before the next ttvn increment | |
617 | * (consistency check) | |
618 | */ | |
619 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 620 | tt_local->common.vid = vid; |
0c69aecc | 621 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
622 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
623 | atomic_set(&tt_local->common.refcount, 2); | |
624 | tt_local->last_seen = jiffies; | |
625 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 626 | |
c5caf4ef LL |
627 | /* the batman interface mac and multicast addresses should never be |
628 | * purged | |
629 | */ | |
630 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
631 | is_multicast_ether_addr(addr)) | |
47c94655 | 632 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 633 | |
807736f6 | 634 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 635 | batadv_choose_tt, &tt_local->common, |
47c94655 | 636 | &tt_local->common.hash_entry); |
80b3f58c SW |
637 | |
638 | if (unlikely(hash_added != 0)) { | |
639 | /* remove the reference for the hash */ | |
47c94655 | 640 | batadv_tt_local_entry_free_ref(tt_local); |
35df3b29 | 641 | batadv_softif_vlan_free_ref(vlan); |
80b3f58c SW |
642 | goto out; |
643 | } | |
644 | ||
068ee6e2 | 645 | add_event: |
3abe4adb | 646 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 647 | |
068ee6e2 AQ |
648 | check_roaming: |
649 | /* Check whether it is a roaming, but don't do anything if the roaming | |
650 | * process has already been handled | |
651 | */ | |
652 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 653 | /* These node are probably going to update their tt table */ |
47c94655 | 654 | head = &tt_global->orig_list; |
db08e6e5 | 655 | rcu_read_lock(); |
b67bfe0d | 656 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 657 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 658 | tt_global->common.vid, |
a513088d | 659 | orig_entry->orig_node); |
db08e6e5 SW |
660 | } |
661 | rcu_read_unlock(); | |
068ee6e2 AQ |
662 | if (roamed_back) { |
663 | batadv_tt_global_free(bat_priv, tt_global, | |
664 | "Roaming canceled"); | |
665 | tt_global = NULL; | |
666 | } else { | |
667 | /* The global entry has to be marked as ROAMING and | |
668 | * has to be kept for consistency purpose | |
669 | */ | |
670 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
671 | tt_global->roam_at = jiffies; | |
672 | } | |
7683fdc1 | 673 | } |
068ee6e2 | 674 | |
3c4f7ab6 AQ |
675 | /* store the current remote flags before altering them. This helps |
676 | * understanding is flags are changing or not | |
677 | */ | |
678 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
679 | ||
680 | if (batadv_is_wifi_netdev(in_dev)) | |
681 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
682 | else | |
683 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 684 | |
9464d071 AQ |
685 | /* check the mark in the skb: if it's equal to the configured |
686 | * isolation_mark, it means the packet is coming from an isolated | |
687 | * non-mesh client | |
688 | */ | |
689 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
690 | if (bat_priv->isolation_mark_mask && | |
691 | match_mark == bat_priv->isolation_mark) | |
692 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
693 | else | |
694 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
695 | ||
3c4f7ab6 AQ |
696 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
697 | * entry so that all the nodes can get the new flags | |
698 | */ | |
699 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
700 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
701 | ||
702 | ret = true; | |
7683fdc1 | 703 | out: |
0c69aecc AQ |
704 | if (in_dev) |
705 | dev_put(in_dev); | |
47c94655 AQ |
706 | if (tt_local) |
707 | batadv_tt_local_entry_free_ref(tt_local); | |
708 | if (tt_global) | |
709 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 710 | return ret; |
c6c8fea2 SE |
711 | } |
712 | ||
7ea7b4a1 AQ |
713 | /** |
714 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
715 | * within a TT Response directed to another node | |
716 | * @orig_node: originator for which the TT data has to be prepared | |
717 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
718 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
719 | * changed can be stored | |
720 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
721 | * function reserves the amount of space needed to send the entire global TT | |
722 | * table. In case of success the value is updated with the real amount of | |
723 | * reserved bytes | |
724 | ||
725 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
726 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
727 | * objects, one per active VLAN served by the originator node. | |
728 | * | |
729 | * Return the size of the allocated buffer or 0 in case of failure. | |
730 | */ | |
6b5e971a | 731 | static u16 |
7ea7b4a1 AQ |
732 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
733 | struct batadv_tvlv_tt_data **tt_data, | |
734 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 735 | s32 *tt_len) |
7ea7b4a1 | 736 | { |
4f248cff SE |
737 | u16 num_vlan = 0; |
738 | u16 num_entries = 0; | |
739 | u16 change_offset; | |
740 | u16 tvlv_len; | |
7ea7b4a1 AQ |
741 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
742 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 743 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
744 | |
745 | rcu_read_lock(); | |
d0fa4f3f | 746 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
747 | num_vlan++; |
748 | num_entries += atomic_read(&vlan->tt.num_entries); | |
749 | } | |
750 | ||
751 | change_offset = sizeof(**tt_data); | |
752 | change_offset += num_vlan * sizeof(*tt_vlan); | |
753 | ||
754 | /* if tt_len is negative, allocate the space needed by the full table */ | |
755 | if (*tt_len < 0) | |
756 | *tt_len = batadv_tt_len(num_entries); | |
757 | ||
758 | tvlv_len = *tt_len; | |
759 | tvlv_len += change_offset; | |
760 | ||
761 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
762 | if (!*tt_data) { | |
763 | *tt_len = 0; | |
764 | goto out; | |
765 | } | |
766 | ||
767 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
768 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
769 | (*tt_data)->num_vlan = htons(num_vlan); | |
770 | ||
771 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
d0fa4f3f | 772 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
773 | tt_vlan->vid = htons(vlan->vid); |
774 | tt_vlan->crc = htonl(vlan->tt.crc); | |
775 | ||
776 | tt_vlan++; | |
777 | } | |
778 | ||
6b5e971a | 779 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
780 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
781 | ||
782 | out: | |
783 | rcu_read_unlock(); | |
784 | return tvlv_len; | |
785 | } | |
786 | ||
787 | /** | |
788 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
789 | * node | |
790 | * @bat_priv: the bat priv with all the soft interface information | |
791 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
792 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
793 | * changes can be stored | |
794 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
795 | * function reserves the amount of space needed to send the entire local TT | |
796 | * table. In case of success the value is updated with the real amount of | |
797 | * reserved bytes | |
798 | * | |
799 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
800 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
801 | * objects, one per active VLAN. | |
802 | * | |
803 | * Return the size of the allocated buffer or 0 in case of failure. | |
804 | */ | |
6b5e971a | 805 | static u16 |
7ea7b4a1 AQ |
806 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
807 | struct batadv_tvlv_tt_data **tt_data, | |
808 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 809 | s32 *tt_len) |
7ea7b4a1 AQ |
810 | { |
811 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
812 | struct batadv_softif_vlan *vlan; | |
4f248cff SE |
813 | u16 num_vlan = 0; |
814 | u16 num_entries = 0; | |
815 | u16 tvlv_len; | |
6b5e971a | 816 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
817 | int change_offset; |
818 | ||
819 | rcu_read_lock(); | |
820 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
821 | num_vlan++; | |
822 | num_entries += atomic_read(&vlan->tt.num_entries); | |
823 | } | |
824 | ||
825 | change_offset = sizeof(**tt_data); | |
826 | change_offset += num_vlan * sizeof(*tt_vlan); | |
827 | ||
828 | /* if tt_len is negative, allocate the space needed by the full table */ | |
829 | if (*tt_len < 0) | |
830 | *tt_len = batadv_tt_len(num_entries); | |
831 | ||
832 | tvlv_len = *tt_len; | |
833 | tvlv_len += change_offset; | |
834 | ||
835 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
836 | if (!*tt_data) { | |
837 | tvlv_len = 0; | |
838 | goto out; | |
839 | } | |
840 | ||
841 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
842 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
843 | (*tt_data)->num_vlan = htons(num_vlan); | |
844 | ||
845 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
846 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
847 | tt_vlan->vid = htons(vlan->vid); | |
848 | tt_vlan->crc = htonl(vlan->tt.crc); | |
849 | ||
850 | tt_vlan++; | |
851 | } | |
852 | ||
6b5e971a | 853 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
854 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
855 | ||
856 | out: | |
857 | rcu_read_unlock(); | |
858 | return tvlv_len; | |
859 | } | |
860 | ||
e1bf0c14 ML |
861 | /** |
862 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
863 | * after local tt changes have been committed | |
864 | * @bat_priv: the bat priv with all the soft interface information | |
865 | */ | |
866 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 867 | { |
e1bf0c14 ML |
868 | struct batadv_tt_change_node *entry, *safe; |
869 | struct batadv_tvlv_tt_data *tt_data; | |
870 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 871 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
872 | int tt_diff_entries_num = 0; |
873 | int tt_diff_entries_count = 0; | |
6b5e971a | 874 | u16 tvlv_len; |
be9aa4c1 | 875 | |
7ea7b4a1 AQ |
876 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
877 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
878 | |
879 | /* if we have too many changes for one packet don't send any | |
880 | * and wait for the tt table request which will be fragmented | |
881 | */ | |
e1bf0c14 ML |
882 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
883 | tt_diff_len = 0; | |
be9aa4c1 | 884 | |
7ea7b4a1 AQ |
885 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
886 | &tt_change, &tt_diff_len); | |
887 | if (!tvlv_len) | |
e1bf0c14 | 888 | return; |
be9aa4c1 | 889 | |
e1bf0c14 | 890 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 891 | |
e1bf0c14 ML |
892 | if (tt_diff_len == 0) |
893 | goto container_register; | |
be9aa4c1 | 894 | |
807736f6 SE |
895 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
896 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 897 | |
807736f6 | 898 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 899 | list) { |
e1bf0c14 ML |
900 | if (tt_diff_entries_count < tt_diff_entries_num) { |
901 | memcpy(tt_change + tt_diff_entries_count, | |
902 | &entry->change, | |
903 | sizeof(struct batadv_tvlv_tt_change)); | |
904 | tt_diff_entries_count++; | |
c6c8fea2 | 905 | } |
a73105b8 AQ |
906 | list_del(&entry->list); |
907 | kfree(entry); | |
c6c8fea2 | 908 | } |
807736f6 | 909 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
910 | |
911 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
912 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
913 | kfree(bat_priv->tt.last_changeset); | |
914 | bat_priv->tt.last_changeset_len = 0; | |
915 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 916 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 917 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 918 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 919 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
920 | * instead of providing the diff |
921 | */ | |
e1bf0c14 | 922 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 923 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
924 | memcpy(bat_priv->tt.last_changeset, |
925 | tt_change, tt_change_len); | |
926 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
927 | } |
928 | } | |
807736f6 | 929 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 930 | |
e1bf0c14 ML |
931 | container_register: |
932 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 933 | tvlv_len); |
e1bf0c14 | 934 | kfree(tt_data); |
c6c8fea2 SE |
935 | } |
936 | ||
08c36d3e | 937 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
938 | { |
939 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 940 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 941 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 942 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 943 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 944 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 945 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 946 | struct hlist_head *head; |
7ea7b4a1 | 947 | unsigned short vid; |
6b5e971a | 948 | u32 i; |
85766a82 AQ |
949 | int last_seen_secs; |
950 | int last_seen_msecs; | |
951 | unsigned long last_seen_jiffies; | |
952 | bool no_purge; | |
6b5e971a | 953 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 954 | |
30da63a6 ML |
955 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
956 | if (!primary_if) | |
32ae9b22 | 957 | goto out; |
c6c8fea2 | 958 | |
86ceb360 | 959 | seq_printf(seq, |
7ea7b4a1 | 960 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 961 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
dd24ddb2 | 962 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 963 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 964 | |
c6c8fea2 SE |
965 | for (i = 0; i < hash->size; i++) { |
966 | head = &hash->table[i]; | |
967 | ||
7aadf889 | 968 | rcu_read_lock(); |
b67bfe0d | 969 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 970 | head, hash_entry) { |
85766a82 AQ |
971 | tt_local = container_of(tt_common_entry, |
972 | struct batadv_tt_local_entry, | |
973 | common); | |
7ea7b4a1 | 974 | vid = tt_common_entry->vid; |
85766a82 AQ |
975 | last_seen_jiffies = jiffies - tt_local->last_seen; |
976 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
977 | last_seen_secs = last_seen_msecs / 1000; | |
978 | last_seen_msecs = last_seen_msecs % 1000; | |
979 | ||
980 | no_purge = tt_common_entry->flags & np_flag; | |
981 | ||
7ea7b4a1 AQ |
982 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
983 | if (!vlan) { | |
984 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
985 | BATADV_PRINT_VID(vid)); | |
986 | continue; | |
987 | } | |
988 | ||
989 | seq_printf(seq, | |
dd24ddb2 | 990 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 991 | tt_common_entry->addr, |
16052789 | 992 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
993 | ((tt_common_entry->flags & |
994 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 995 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
996 | ((tt_common_entry->flags & |
997 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
998 | ((tt_common_entry->flags & | |
999 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
1000 | ((tt_common_entry->flags & | |
1001 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1002 | ((tt_common_entry->flags & | |
1003 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1004 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
1005 | no_purge ? 0 : last_seen_msecs, |
1006 | vlan->tt.crc); | |
1007 | ||
1008 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 1009 | } |
7aadf889 | 1010 | rcu_read_unlock(); |
c6c8fea2 | 1011 | } |
32ae9b22 ML |
1012 | out: |
1013 | if (primary_if) | |
e5d89254 | 1014 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1015 | return 0; |
c6c8fea2 SE |
1016 | } |
1017 | ||
56303d34 SE |
1018 | static void |
1019 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1020 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1021 | u16 flags, const char *message) |
c6c8fea2 | 1022 | { |
3abe4adb | 1023 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1024 | |
015758d0 AQ |
1025 | /* The local client has to be marked as "pending to be removed" but has |
1026 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1027 | * response issued before the net ttvn increment (consistency check) |
1028 | */ | |
acd34afa | 1029 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1030 | |
39c75a51 | 1031 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1032 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1033 | tt_local_entry->common.addr, | |
1034 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1035 | } |
1036 | ||
7f91d06c AQ |
1037 | /** |
1038 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1039 | * @bat_priv: the bat priv with all the soft interface information | |
1040 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1041 | * @vid: VLAN identifier |
7f91d06c AQ |
1042 | * @message: message to append to the log on deletion |
1043 | * @roaming: true if the deletion is due to a roaming event | |
1044 | * | |
1045 | * Returns the flags assigned to the local entry before being deleted | |
1046 | */ | |
6b5e971a SE |
1047 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1048 | unsigned short vid, const char *message, | |
1049 | bool roaming) | |
c6c8fea2 | 1050 | { |
170173bf | 1051 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1052 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
35df3b29 | 1053 | struct batadv_softif_vlan *vlan; |
ef72706a | 1054 | void *tt_entry_exists; |
c6c8fea2 | 1055 | |
c018ad3d | 1056 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1057 | if (!tt_local_entry) |
1058 | goto out; | |
1059 | ||
7f91d06c AQ |
1060 | curr_flags = tt_local_entry->common.flags; |
1061 | ||
acd34afa | 1062 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1063 | /* if this global entry addition is due to a roaming, the node has to |
1064 | * mark the local entry as "roamed" in order to correctly reroute | |
1065 | * packets later | |
1066 | */ | |
7c1fd91d | 1067 | if (roaming) { |
acd34afa | 1068 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1069 | /* mark the local client as ROAMed */ |
1070 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1071 | } | |
42d0b044 | 1072 | |
068ee6e2 AQ |
1073 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1074 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1075 | message); | |
1076 | goto out; | |
1077 | } | |
1078 | /* if this client has been added right now, it is possible to | |
1079 | * immediately purge it | |
1080 | */ | |
3abe4adb | 1081 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1082 | |
1083 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1084 | batadv_compare_tt, | |
1085 | batadv_choose_tt, | |
1086 | &tt_local_entry->common); | |
1087 | if (!tt_entry_exists) | |
1088 | goto out; | |
1089 | ||
1090 | /* extra call to free the local tt entry */ | |
068ee6e2 | 1091 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c | 1092 | |
35df3b29 AQ |
1093 | /* decrease the reference held for this vlan */ |
1094 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc ML |
1095 | if (!vlan) |
1096 | goto out; | |
1097 | ||
35df3b29 AQ |
1098 | batadv_softif_vlan_free_ref(vlan); |
1099 | batadv_softif_vlan_free_ref(vlan); | |
1100 | ||
7683fdc1 AQ |
1101 | out: |
1102 | if (tt_local_entry) | |
a513088d | 1103 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1104 | |
1105 | return curr_flags; | |
c6c8fea2 SE |
1106 | } |
1107 | ||
a19d3d85 ML |
1108 | /** |
1109 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1110 | * @bat_priv: the bat priv with all the soft interface information | |
1111 | * @head: pointer to the list containing the local tt entries | |
1112 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1113 | * inactive or not | |
1114 | */ | |
56303d34 | 1115 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1116 | struct hlist_head *head, |
1117 | int timeout) | |
c6c8fea2 | 1118 | { |
56303d34 SE |
1119 | struct batadv_tt_local_entry *tt_local_entry; |
1120 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1121 | struct hlist_node *node_tmp; |
acd34afa | 1122 | |
b67bfe0d | 1123 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1124 | hash_entry) { |
1125 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1126 | struct batadv_tt_local_entry, |
1127 | common); | |
acd34afa SE |
1128 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1129 | continue; | |
1130 | ||
1131 | /* entry already marked for deletion */ | |
1132 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1133 | continue; | |
1134 | ||
a19d3d85 | 1135 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1136 | continue; |
1137 | ||
1138 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1139 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1140 | } | |
1141 | } | |
1142 | ||
a19d3d85 ML |
1143 | /** |
1144 | * batadv_tt_local_purge - purge inactive tt local entries | |
1145 | * @bat_priv: the bat priv with all the soft interface information | |
1146 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1147 | * inactive or not | |
1148 | */ | |
1149 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1150 | int timeout) | |
acd34afa | 1151 | { |
807736f6 | 1152 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1153 | struct hlist_head *head; |
7683fdc1 | 1154 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1155 | u32 i; |
c6c8fea2 | 1156 | |
c6c8fea2 SE |
1157 | for (i = 0; i < hash->size; i++) { |
1158 | head = &hash->table[i]; | |
7683fdc1 | 1159 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1160 | |
7683fdc1 | 1161 | spin_lock_bh(list_lock); |
a19d3d85 | 1162 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1163 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1164 | } |
c6c8fea2 SE |
1165 | } |
1166 | ||
56303d34 | 1167 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1168 | { |
5bf74e9c | 1169 | struct batadv_hashtable *hash; |
a73105b8 | 1170 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1171 | struct batadv_tt_common_entry *tt_common_entry; |
1172 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 1173 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 1174 | struct hlist_node *node_tmp; |
7683fdc1 | 1175 | struct hlist_head *head; |
6b5e971a | 1176 | u32 i; |
a73105b8 | 1177 | |
807736f6 | 1178 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1179 | return; |
1180 | ||
807736f6 | 1181 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1182 | |
1183 | for (i = 0; i < hash->size; i++) { | |
1184 | head = &hash->table[i]; | |
1185 | list_lock = &hash->list_locks[i]; | |
1186 | ||
1187 | spin_lock_bh(list_lock); | |
b67bfe0d | 1188 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1189 | head, hash_entry) { |
b67bfe0d | 1190 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1191 | tt_local = container_of(tt_common_entry, |
1192 | struct batadv_tt_local_entry, | |
1193 | common); | |
35df3b29 AQ |
1194 | |
1195 | /* decrease the reference held for this vlan */ | |
1196 | vlan = batadv_softif_vlan_get(bat_priv, | |
1197 | tt_common_entry->vid); | |
354136bc ML |
1198 | if (vlan) { |
1199 | batadv_softif_vlan_free_ref(vlan); | |
1200 | batadv_softif_vlan_free_ref(vlan); | |
1201 | } | |
35df3b29 | 1202 | |
56303d34 | 1203 | batadv_tt_local_entry_free_ref(tt_local); |
a73105b8 AQ |
1204 | } |
1205 | spin_unlock_bh(list_lock); | |
1206 | } | |
1207 | ||
1a8eaf07 | 1208 | batadv_hash_destroy(hash); |
a73105b8 | 1209 | |
807736f6 | 1210 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1211 | } |
1212 | ||
56303d34 | 1213 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1214 | { |
807736f6 | 1215 | if (bat_priv->tt.global_hash) |
5346c35e | 1216 | return 0; |
c6c8fea2 | 1217 | |
807736f6 | 1218 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1219 | |
807736f6 | 1220 | if (!bat_priv->tt.global_hash) |
5346c35e | 1221 | return -ENOMEM; |
c6c8fea2 | 1222 | |
dec05074 AQ |
1223 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1224 | &batadv_tt_global_hash_lock_class_key); | |
1225 | ||
5346c35e | 1226 | return 0; |
c6c8fea2 SE |
1227 | } |
1228 | ||
56303d34 | 1229 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1230 | { |
56303d34 | 1231 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1232 | |
807736f6 | 1233 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1234 | |
807736f6 | 1235 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1236 | list) { |
1237 | list_del(&entry->list); | |
1238 | kfree(entry); | |
1239 | } | |
c6c8fea2 | 1240 | |
807736f6 SE |
1241 | atomic_set(&bat_priv->tt.local_changes, 0); |
1242 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1243 | } |
c6c8fea2 | 1244 | |
d657e621 AQ |
1245 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1246 | * batadv_tt_global_entry list | |
1247 | * | |
1248 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1249 | */ |
d657e621 AQ |
1250 | static struct batadv_tt_orig_list_entry * |
1251 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1252 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1253 | { |
d657e621 | 1254 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1255 | const struct hlist_head *head; |
db08e6e5 SW |
1256 | |
1257 | rcu_read_lock(); | |
1258 | head = &entry->orig_list; | |
b67bfe0d | 1259 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1260 | if (tmp_orig_entry->orig_node != orig_node) |
1261 | continue; | |
1262 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1263 | continue; | |
1264 | ||
1265 | orig_entry = tmp_orig_entry; | |
1266 | break; | |
db08e6e5 SW |
1267 | } |
1268 | rcu_read_unlock(); | |
d657e621 AQ |
1269 | |
1270 | return orig_entry; | |
1271 | } | |
1272 | ||
1273 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1274 | * returns true if found, false otherwise | |
1275 | */ | |
1276 | static bool | |
1277 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1278 | const struct batadv_orig_node *orig_node) | |
1279 | { | |
1280 | struct batadv_tt_orig_list_entry *orig_entry; | |
1281 | bool found = false; | |
1282 | ||
1283 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1284 | if (orig_entry) { | |
1285 | found = true; | |
1286 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1287 | } | |
1288 | ||
db08e6e5 SW |
1289 | return found; |
1290 | } | |
1291 | ||
a513088d | 1292 | static void |
d657e621 | 1293 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1294 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1295 | { |
56303d34 | 1296 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1297 | |
d657e621 | 1298 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1299 | if (orig_entry) { |
1300 | /* refresh the ttvn: the current value could be a bogus one that | |
1301 | * was added during a "temporary client detection" | |
1302 | */ | |
1303 | orig_entry->ttvn = ttvn; | |
d657e621 | 1304 | goto out; |
30cfd02b | 1305 | } |
d657e621 | 1306 | |
db08e6e5 SW |
1307 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1308 | if (!orig_entry) | |
d657e621 | 1309 | goto out; |
db08e6e5 SW |
1310 | |
1311 | INIT_HLIST_NODE(&orig_entry->list); | |
1312 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1313 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1314 | orig_entry->orig_node = orig_node; |
1315 | orig_entry->ttvn = ttvn; | |
d657e621 | 1316 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1317 | |
d657e621 | 1318 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1319 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1320 | &tt_global->orig_list); |
1321 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1322 | atomic_inc(&tt_global->orig_list_count); |
1323 | ||
d657e621 AQ |
1324 | out: |
1325 | if (orig_entry) | |
1326 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1327 | } |
1328 | ||
d4ff40f6 AQ |
1329 | /** |
1330 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1331 | * @bat_priv: the bat priv with all the soft interface information | |
1332 | * @orig_node: the originator announcing the client | |
1333 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1334 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1335 | * @flags: TT flags that have to be set for this non-mesh client |
1336 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1337 | * | |
1338 | * Add a new TT global entry for the given originator. If the entry already | |
1339 | * exists add a new reference to the given originator (a global entry can have | |
1340 | * references to multiple originators) and adjust the flags attribute to reflect | |
1341 | * the function argument. | |
1342 | * If a TT local entry exists for this non-mesh client remove it. | |
1343 | * | |
1344 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1345 | * |
1346 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1347 | */ |
1e5d49fc AQ |
1348 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1349 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1350 | const unsigned char *tt_addr, |
6b5e971a | 1351 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1352 | { |
170173bf SE |
1353 | struct batadv_tt_global_entry *tt_global_entry; |
1354 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1355 | bool ret = false; |
80b3f58c | 1356 | int hash_added; |
56303d34 | 1357 | struct batadv_tt_common_entry *common; |
6b5e971a | 1358 | u16 local_flags; |
c6c8fea2 | 1359 | |
cfd4f757 AQ |
1360 | /* ignore global entries from backbone nodes */ |
1361 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1362 | return true; | |
1363 | ||
c018ad3d AQ |
1364 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1365 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1366 | |
1367 | /* if the node already has a local client for this entry, it has to wait | |
1368 | * for a roaming advertisement instead of manually messing up the global | |
1369 | * table | |
1370 | */ | |
1371 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1372 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1373 | goto out; | |
a73105b8 AQ |
1374 | |
1375 | if (!tt_global_entry) { | |
d4f44692 | 1376 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1377 | if (!tt_global_entry) |
7683fdc1 AQ |
1378 | goto out; |
1379 | ||
c0a55929 | 1380 | common = &tt_global_entry->common; |
8fdd0153 | 1381 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1382 | common->vid = vid; |
db08e6e5 | 1383 | |
d4f44692 | 1384 | common->flags = flags; |
cc47f66e | 1385 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1386 | /* node must store current time in case of roaming. This is |
1387 | * needed to purge this entry out on timeout (if nobody claims | |
1388 | * it) | |
1389 | */ | |
1390 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1391 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1392 | atomic_set(&common->refcount, 2); |
30cfd02b | 1393 | common->added_at = jiffies; |
db08e6e5 SW |
1394 | |
1395 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1396 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1397 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1398 | |
807736f6 | 1399 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1400 | batadv_compare_tt, |
c018ad3d | 1401 | batadv_choose_tt, common, |
a513088d | 1402 | &common->hash_entry); |
80b3f58c SW |
1403 | |
1404 | if (unlikely(hash_added != 0)) { | |
1405 | /* remove the reference for the hash */ | |
a513088d | 1406 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1407 | goto out_remove; |
1408 | } | |
a73105b8 | 1409 | } else { |
068ee6e2 | 1410 | common = &tt_global_entry->common; |
30cfd02b AQ |
1411 | /* If there is already a global entry, we can use this one for |
1412 | * our processing. | |
068ee6e2 AQ |
1413 | * But if we are trying to add a temporary client then here are |
1414 | * two options at this point: | |
1415 | * 1) the global client is not a temporary client: the global | |
1416 | * client has to be left as it is, temporary information | |
1417 | * should never override any already known client state | |
1418 | * 2) the global client is a temporary client: purge the | |
1419 | * originator list and add the new one orig_entry | |
30cfd02b | 1420 | */ |
068ee6e2 AQ |
1421 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1422 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1423 | goto out; | |
1424 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1425 | orig_node)) | |
1426 | goto out_remove; | |
1427 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1428 | goto add_orig_entry; | |
1429 | } | |
30cfd02b AQ |
1430 | |
1431 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1432 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1433 | * remove the previous temporary orig node and re-add it | |
1434 | * if required. If the orig entry changed, the new one which | |
1435 | * is a non-temporary entry is preferred. | |
30cfd02b | 1436 | */ |
a6cb3909 SW |
1437 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1438 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1439 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1440 | } | |
db08e6e5 | 1441 | |
e9c00136 AQ |
1442 | /* the change can carry possible "attribute" flags like the |
1443 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1444 | * client entry | |
1445 | */ | |
ad7e2c46 | 1446 | common->flags |= flags; |
e9c00136 | 1447 | |
acd34afa SE |
1448 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1449 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1450 | * delete + roaming change for this originator. |
1451 | * | |
1452 | * We should first delete the old originator before adding the | |
1453 | * new one. | |
1454 | */ | |
068ee6e2 | 1455 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1456 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1457 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1458 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1459 | } |
1460 | } | |
068ee6e2 | 1461 | add_orig_entry: |
30cfd02b | 1462 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1463 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1464 | |
39c75a51 | 1465 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1466 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1467 | common->addr, BATADV_PRINT_VID(common->vid), | |
1468 | orig_node->orig); | |
1e5d49fc | 1469 | ret = true; |
c6c8fea2 | 1470 | |
80b3f58c | 1471 | out_remove: |
c5caf4ef LL |
1472 | /* Do not remove multicast addresses from the local hash on |
1473 | * global additions | |
1474 | */ | |
1475 | if (is_multicast_ether_addr(tt_addr)) | |
1476 | goto out; | |
7f91d06c | 1477 | |
a73105b8 | 1478 | /* remove address from local hash if present */ |
c018ad3d | 1479 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1480 | "global tt received", |
c1d07431 | 1481 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1482 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1483 | ||
068ee6e2 AQ |
1484 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1485 | /* this is a normal global add. Therefore the client is not in a | |
1486 | * roaming state anymore. | |
1487 | */ | |
1488 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1489 | ||
7683fdc1 AQ |
1490 | out: |
1491 | if (tt_global_entry) | |
a513088d | 1492 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1493 | if (tt_local_entry) |
1494 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1495 | return ret; |
c6c8fea2 SE |
1496 | } |
1497 | ||
1b371d13 SW |
1498 | /** |
1499 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1500 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1501 | * @tt_global_entry: global translation table entry to be analyzed |
1502 | * | |
1503 | * This functon assumes the caller holds rcu_read_lock(). | |
1504 | * Returns best originator list entry or NULL on errors. | |
1505 | */ | |
1506 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1507 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1508 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1509 | { |
4627456a AQ |
1510 | struct batadv_neigh_node *router, *best_router = NULL; |
1511 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1512 | struct hlist_head *head; |
981d8900 | 1513 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1514 | |
1515 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1516 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1517 | router = batadv_orig_router_get(orig_entry->orig_node, |
1518 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1519 | if (!router) |
1520 | continue; | |
1521 | ||
4627456a | 1522 | if (best_router && |
89652331 SW |
1523 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1524 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1525 | batadv_neigh_node_free_ref(router); |
1526 | continue; | |
981d8900 SE |
1527 | } |
1528 | ||
4627456a AQ |
1529 | /* release the refcount for the "old" best */ |
1530 | if (best_router) | |
1531 | batadv_neigh_node_free_ref(best_router); | |
1532 | ||
1533 | best_entry = orig_entry; | |
1534 | best_router = router; | |
981d8900 SE |
1535 | } |
1536 | ||
4627456a AQ |
1537 | if (best_router) |
1538 | batadv_neigh_node_free_ref(best_router); | |
1539 | ||
981d8900 SE |
1540 | return best_entry; |
1541 | } | |
1542 | ||
1b371d13 SW |
1543 | /** |
1544 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1545 | * for this global entry | |
4627456a | 1546 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1547 | * @tt_global_entry: global translation table entry to be printed |
1548 | * @seq: debugfs table seq_file struct | |
1549 | * | |
1550 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1551 | */ |
a513088d | 1552 | static void |
4627456a AQ |
1553 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1554 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1555 | struct seq_file *seq) |
db08e6e5 | 1556 | { |
981d8900 | 1557 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1558 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1559 | struct batadv_orig_node_vlan *vlan; |
1560 | struct hlist_head *head; | |
6b5e971a SE |
1561 | u8 last_ttvn; |
1562 | u16 flags; | |
db08e6e5 SW |
1563 | |
1564 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1565 | flags = tt_common_entry->flags; |
1566 | ||
4627456a | 1567 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1568 | if (best_entry) { |
7ea7b4a1 AQ |
1569 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1570 | tt_common_entry->vid); | |
1571 | if (!vlan) { | |
1572 | seq_printf(seq, | |
1573 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1574 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1575 | best_entry->orig_node->orig); | |
1576 | goto print_list; | |
1577 | } | |
1578 | ||
981d8900 | 1579 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1580 | seq_printf(seq, |
dd24ddb2 | 1581 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1582 | '*', tt_global_entry->common.addr, |
16052789 | 1583 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1584 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1585 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1586 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1587 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1588 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1589 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1590 | |
1591 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1592 | } |
db08e6e5 | 1593 | |
7ea7b4a1 | 1594 | print_list: |
db08e6e5 SW |
1595 | head = &tt_global_entry->orig_list; |
1596 | ||
b67bfe0d | 1597 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1598 | if (best_entry == orig_entry) |
1599 | continue; | |
1600 | ||
7ea7b4a1 AQ |
1601 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1602 | tt_common_entry->vid); | |
1603 | if (!vlan) { | |
1604 | seq_printf(seq, | |
1605 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1606 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1607 | orig_entry->orig_node->orig); | |
1608 | continue; | |
1609 | } | |
1610 | ||
db08e6e5 | 1611 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1612 | seq_printf(seq, |
dd24ddb2 | 1613 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1614 | '+', tt_global_entry->common.addr, |
16052789 | 1615 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1616 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1617 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1618 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1619 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1620 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1621 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1622 | |
1623 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1624 | } |
1625 | } | |
1626 | ||
08c36d3e | 1627 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1628 | { |
1629 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1630 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1631 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1632 | struct batadv_tt_common_entry *tt_common_entry; |
1633 | struct batadv_tt_global_entry *tt_global; | |
1634 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1635 | struct hlist_head *head; |
6b5e971a | 1636 | u32 i; |
c6c8fea2 | 1637 | |
30da63a6 ML |
1638 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1639 | if (!primary_if) | |
32ae9b22 | 1640 | goto out; |
c6c8fea2 | 1641 | |
2dafb49d AQ |
1642 | seq_printf(seq, |
1643 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1644 | net_dev->name); |
16052789 AQ |
1645 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1646 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1647 | "CRC", "Flags"); | |
c6c8fea2 | 1648 | |
c6c8fea2 SE |
1649 | for (i = 0; i < hash->size; i++) { |
1650 | head = &hash->table[i]; | |
1651 | ||
7aadf889 | 1652 | rcu_read_lock(); |
b67bfe0d | 1653 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1654 | head, hash_entry) { |
56303d34 SE |
1655 | tt_global = container_of(tt_common_entry, |
1656 | struct batadv_tt_global_entry, | |
1657 | common); | |
4627456a | 1658 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1659 | } |
7aadf889 | 1660 | rcu_read_unlock(); |
c6c8fea2 | 1661 | } |
32ae9b22 ML |
1662 | out: |
1663 | if (primary_if) | |
e5d89254 | 1664 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1665 | return 0; |
c6c8fea2 SE |
1666 | } |
1667 | ||
1d8ab8d3 | 1668 | /** |
433ff98f | 1669 | * _batadv_tt_global_del_orig_entry - remove and free an orig_entry |
1d8ab8d3 LL |
1670 | * @tt_global_entry: the global entry to remove the orig_entry from |
1671 | * @orig_entry: the orig entry to remove and free | |
1672 | * | |
1673 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1674 | * free this orig_entry afterwards. | |
433ff98f ML |
1675 | * |
1676 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
1677 | * part of a list. | |
1d8ab8d3 LL |
1678 | */ |
1679 | static void | |
433ff98f ML |
1680 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
1681 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 1682 | { |
2c72d655 SE |
1683 | lockdep_assert_held(&tt_global_entry->list_lock); |
1684 | ||
1d8ab8d3 LL |
1685 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1686 | tt_global_entry->common.vid); | |
1687 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
1688 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
1689 | * being part of a list | |
1690 | */ | |
1d8ab8d3 LL |
1691 | hlist_del_rcu(&orig_entry->list); |
1692 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1693 | } | |
1694 | ||
db08e6e5 | 1695 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1696 | static void |
56303d34 | 1697 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1698 | { |
db08e6e5 | 1699 | struct hlist_head *head; |
b67bfe0d | 1700 | struct hlist_node *safe; |
56303d34 | 1701 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1702 | |
db08e6e5 SW |
1703 | spin_lock_bh(&tt_global_entry->list_lock); |
1704 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 1705 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 1706 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 1707 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1708 | } |
1709 | ||
1d8ab8d3 LL |
1710 | /** |
1711 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1712 | * @bat_priv: the bat priv with all the soft interface information | |
1713 | * @tt_global_entry: the global entry to remove the orig_node from | |
1714 | * @orig_node: the originator announcing the client | |
1715 | * @message: message to append to the log on deletion | |
1716 | * | |
1717 | * Remove the given orig_node and its according orig_entry from the given | |
1718 | * global tt entry. | |
1719 | */ | |
a513088d | 1720 | static void |
1d8ab8d3 LL |
1721 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1722 | struct batadv_tt_global_entry *tt_global_entry, | |
1723 | struct batadv_orig_node *orig_node, | |
1724 | const char *message) | |
db08e6e5 SW |
1725 | { |
1726 | struct hlist_head *head; | |
b67bfe0d | 1727 | struct hlist_node *safe; |
56303d34 | 1728 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1729 | unsigned short vid; |
db08e6e5 SW |
1730 | |
1731 | spin_lock_bh(&tt_global_entry->list_lock); | |
1732 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1733 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1734 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1735 | vid = tt_global_entry->common.vid; |
39c75a51 | 1736 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1737 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1738 | orig_node->orig, |
16052789 AQ |
1739 | tt_global_entry->common.addr, |
1740 | BATADV_PRINT_VID(vid), message); | |
433ff98f ML |
1741 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
1742 | orig_entry); | |
db08e6e5 SW |
1743 | } |
1744 | } | |
1745 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1746 | } | |
1747 | ||
db08e6e5 | 1748 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1749 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1750 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1751 | */ |
a513088d | 1752 | static void |
56303d34 SE |
1753 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1754 | struct batadv_tt_global_entry *tt_global_entry, | |
1755 | struct batadv_orig_node *orig_node, | |
1756 | const char *message) | |
db08e6e5 SW |
1757 | { |
1758 | bool last_entry = true; | |
1759 | struct hlist_head *head; | |
56303d34 | 1760 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1761 | |
1762 | /* no local entry exists, case 1: | |
1763 | * Check if this is the last one or if other entries exist. | |
1764 | */ | |
1765 | ||
1766 | rcu_read_lock(); | |
1767 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1768 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1769 | if (orig_entry->orig_node != orig_node) { |
1770 | last_entry = false; | |
1771 | break; | |
1772 | } | |
1773 | } | |
1774 | rcu_read_unlock(); | |
1775 | ||
1776 | if (last_entry) { | |
1777 | /* its the last one, mark for roaming. */ | |
acd34afa | 1778 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1779 | tt_global_entry->roam_at = jiffies; |
1780 | } else | |
1781 | /* there is another entry, we can simply delete this | |
1782 | * one and can still use the other one. | |
1783 | */ | |
1d8ab8d3 LL |
1784 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1785 | orig_node, message); | |
db08e6e5 SW |
1786 | } |
1787 | ||
c018ad3d AQ |
1788 | /** |
1789 | * batadv_tt_global_del - remove a client from the global table | |
1790 | * @bat_priv: the bat priv with all the soft interface information | |
1791 | * @orig_node: an originator serving this client | |
1792 | * @addr: the mac address of the client | |
1793 | * @vid: VLAN identifier | |
1794 | * @message: a message explaining the reason for deleting the client to print | |
1795 | * for debugging purpose | |
1796 | * @roaming: true if the deletion has been triggered by a roaming event | |
1797 | */ | |
56303d34 SE |
1798 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1799 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1800 | const unsigned char *addr, unsigned short vid, |
a513088d | 1801 | const char *message, bool roaming) |
a73105b8 | 1802 | { |
170173bf | 1803 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1804 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1805 | |
c018ad3d | 1806 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1807 | if (!tt_global_entry) |
7683fdc1 | 1808 | goto out; |
a73105b8 | 1809 | |
db08e6e5 | 1810 | if (!roaming) { |
1d8ab8d3 LL |
1811 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1812 | orig_node, message); | |
db08e6e5 SW |
1813 | |
1814 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1815 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1816 | message); | |
db08e6e5 SW |
1817 | |
1818 | goto out; | |
1819 | } | |
92f90f56 SE |
1820 | |
1821 | /* if we are deleting a global entry due to a roam | |
1822 | * event, there are two possibilities: | |
db08e6e5 SW |
1823 | * 1) the client roamed from node A to node B => if there |
1824 | * is only one originator left for this client, we mark | |
acd34afa | 1825 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1826 | * wait for node B to claim it. In case of timeout |
1827 | * the entry is purged. | |
db08e6e5 SW |
1828 | * |
1829 | * If there are other originators left, we directly delete | |
1830 | * the originator. | |
92f90f56 | 1831 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1832 | * the global entry, since it is useless now. |
1833 | */ | |
a513088d | 1834 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1835 | tt_global_entry->common.addr, |
1836 | vid); | |
a513088d | 1837 | if (local_entry) { |
db08e6e5 | 1838 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1839 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1840 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1841 | } else |
1842 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1843 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1844 | orig_node, message); | |
92f90f56 | 1845 | |
cc47f66e | 1846 | out: |
7683fdc1 | 1847 | if (tt_global_entry) |
a513088d SE |
1848 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1849 | if (local_entry) | |
1850 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1851 | } |
1852 | ||
95fb130d AQ |
1853 | /** |
1854 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1855 | * given originator matching the provided vid | |
1856 | * @bat_priv: the bat priv with all the soft interface information | |
1857 | * @orig_node: the originator owning the entries to remove | |
1858 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1859 | * removed | |
1860 | * @message: debug message to print as "reason" | |
1861 | */ | |
56303d34 SE |
1862 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1863 | struct batadv_orig_node *orig_node, | |
6b5e971a | 1864 | s32 match_vid, |
56303d34 | 1865 | const char *message) |
c6c8fea2 | 1866 | { |
56303d34 SE |
1867 | struct batadv_tt_global_entry *tt_global; |
1868 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 1869 | u32 i; |
807736f6 | 1870 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1871 | struct hlist_node *safe; |
a73105b8 | 1872 | struct hlist_head *head; |
7683fdc1 | 1873 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1874 | unsigned short vid; |
c6c8fea2 | 1875 | |
6e801494 SW |
1876 | if (!hash) |
1877 | return; | |
1878 | ||
a73105b8 AQ |
1879 | for (i = 0; i < hash->size; i++) { |
1880 | head = &hash->table[i]; | |
7683fdc1 | 1881 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1882 | |
7683fdc1 | 1883 | spin_lock_bh(list_lock); |
b67bfe0d | 1884 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1885 | head, hash_entry) { |
95fb130d AQ |
1886 | /* remove only matching entries */ |
1887 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1888 | continue; | |
1889 | ||
56303d34 SE |
1890 | tt_global = container_of(tt_common_entry, |
1891 | struct batadv_tt_global_entry, | |
1892 | common); | |
db08e6e5 | 1893 | |
1d8ab8d3 LL |
1894 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1895 | orig_node, message); | |
db08e6e5 | 1896 | |
56303d34 | 1897 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1898 | vid = tt_global->common.vid; |
39c75a51 | 1899 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1900 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1901 | tt_global->common.addr, | |
1902 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1903 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1904 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1905 | } |
a73105b8 | 1906 | } |
7683fdc1 | 1907 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1908 | } |
ac4eebd4 | 1909 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
1910 | } |
1911 | ||
30cfd02b AQ |
1912 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1913 | char **msg) | |
cc47f66e | 1914 | { |
30cfd02b AQ |
1915 | bool purge = false; |
1916 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1917 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1918 | |
30cfd02b AQ |
1919 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1920 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1921 | purge = true; | |
1922 | *msg = "Roaming timeout\n"; | |
1923 | } | |
42d0b044 | 1924 | |
30cfd02b AQ |
1925 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1926 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1927 | purge = true; | |
1928 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1929 | } |
30cfd02b AQ |
1930 | |
1931 | return purge; | |
42d0b044 SE |
1932 | } |
1933 | ||
30cfd02b | 1934 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1935 | { |
807736f6 | 1936 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1937 | struct hlist_head *head; |
b67bfe0d | 1938 | struct hlist_node *node_tmp; |
7683fdc1 | 1939 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1940 | u32 i; |
30cfd02b AQ |
1941 | char *msg = NULL; |
1942 | struct batadv_tt_common_entry *tt_common; | |
1943 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1944 | |
cc47f66e AQ |
1945 | for (i = 0; i < hash->size; i++) { |
1946 | head = &hash->table[i]; | |
7683fdc1 | 1947 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1948 | |
7683fdc1 | 1949 | spin_lock_bh(list_lock); |
b67bfe0d | 1950 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1951 | hash_entry) { |
1952 | tt_global = container_of(tt_common, | |
1953 | struct batadv_tt_global_entry, | |
1954 | common); | |
1955 | ||
1956 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1957 | continue; | |
1958 | ||
1959 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1960 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1961 | tt_global->common.addr, | |
1962 | BATADV_PRINT_VID(tt_global->common.vid), | |
1963 | msg); | |
30cfd02b | 1964 | |
b67bfe0d | 1965 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1966 | |
1967 | batadv_tt_global_entry_free_ref(tt_global); | |
1968 | } | |
7683fdc1 | 1969 | spin_unlock_bh(list_lock); |
cc47f66e | 1970 | } |
cc47f66e AQ |
1971 | } |
1972 | ||
56303d34 | 1973 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1974 | { |
5bf74e9c | 1975 | struct batadv_hashtable *hash; |
7683fdc1 | 1976 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1977 | struct batadv_tt_common_entry *tt_common_entry; |
1978 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1979 | struct hlist_node *node_tmp; |
7683fdc1 | 1980 | struct hlist_head *head; |
6b5e971a | 1981 | u32 i; |
7683fdc1 | 1982 | |
807736f6 | 1983 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1984 | return; |
1985 | ||
807736f6 | 1986 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1987 | |
1988 | for (i = 0; i < hash->size; i++) { | |
1989 | head = &hash->table[i]; | |
1990 | list_lock = &hash->list_locks[i]; | |
1991 | ||
1992 | spin_lock_bh(list_lock); | |
b67bfe0d | 1993 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1994 | head, hash_entry) { |
b67bfe0d | 1995 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1996 | tt_global = container_of(tt_common_entry, |
1997 | struct batadv_tt_global_entry, | |
1998 | common); | |
1999 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
2000 | } |
2001 | spin_unlock_bh(list_lock); | |
2002 | } | |
2003 | ||
1a8eaf07 | 2004 | batadv_hash_destroy(hash); |
7683fdc1 | 2005 | |
807736f6 | 2006 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2007 | } |
2008 | ||
56303d34 SE |
2009 | static bool |
2010 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2011 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
2012 | { |
2013 | bool ret = false; | |
2014 | ||
acd34afa SE |
2015 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2016 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
2017 | ret = true; |
2018 | ||
2d2fcc2a AQ |
2019 | /* check if the two clients are marked as isolated */ |
2020 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2021 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
2022 | ret = true; | |
2023 | ||
59b699cd AQ |
2024 | return ret; |
2025 | } | |
2026 | ||
c018ad3d AQ |
2027 | /** |
2028 | * batadv_transtable_search - get the mesh destination for a given client | |
2029 | * @bat_priv: the bat priv with all the soft interface information | |
2030 | * @src: mac address of the source client | |
2031 | * @addr: mac address of the destination client | |
2032 | * @vid: VLAN identifier | |
2033 | * | |
2034 | * Returns a pointer to the originator that was selected as destination in the | |
2035 | * mesh for contacting the client 'addr', NULL otherwise. | |
2036 | * In case of multiple originators serving the same client, the function returns | |
2037 | * the best one (best in terms of metric towards the destination node). | |
2038 | * | |
2039 | * If the two clients are AP isolated the function returns NULL. | |
2040 | */ | |
56303d34 | 2041 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2042 | const u8 *src, |
2043 | const u8 *addr, | |
c018ad3d | 2044 | unsigned short vid) |
c6c8fea2 | 2045 | { |
56303d34 SE |
2046 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2047 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2048 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2049 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2050 | |
eceb22ae | 2051 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2052 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2053 | if (!tt_local_entry || |
2054 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2055 | goto out; |
2056 | } | |
7aadf889 | 2057 | |
c018ad3d | 2058 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2059 | if (!tt_global_entry) |
7b36e8ee | 2060 | goto out; |
7aadf889 | 2061 | |
3d393e47 | 2062 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2063 | * isolation |
2064 | */ | |
a513088d SE |
2065 | if (tt_local_entry && |
2066 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2067 | goto out; |
2068 | ||
db08e6e5 | 2069 | rcu_read_lock(); |
4627456a | 2070 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2071 | /* found anything? */ |
981d8900 SE |
2072 | if (best_entry) |
2073 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
2074 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
2075 | orig_node = NULL; | |
2076 | rcu_read_unlock(); | |
981d8900 | 2077 | |
7b36e8ee | 2078 | out: |
3d393e47 | 2079 | if (tt_global_entry) |
a513088d | 2080 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 2081 | if (tt_local_entry) |
a513088d | 2082 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 2083 | |
7b36e8ee | 2084 | return orig_node; |
c6c8fea2 | 2085 | } |
a73105b8 | 2086 | |
ced72933 AQ |
2087 | /** |
2088 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2089 | * to the given orig_node | |
2090 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2091 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2092 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2093 | * |
2094 | * This function computes the checksum for the global table corresponding to a | |
2095 | * specific originator. In particular, the checksum is computed as follows: For | |
2096 | * each client connected to the originator the CRC32C of the MAC address and the | |
2097 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2098 | * together. | |
2099 | * | |
2100 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2101 | * produce a unique hash of the table, but since the order which is used to feed | |
2102 | * the CRC32C function affects the result and since every node in the network | |
2103 | * probably sorts the clients differently, the hash function cannot be directly | |
2104 | * computed over the entire table. Hence the CRC32C is used only on | |
2105 | * the single client entry, while all the results are then xor'ed together | |
2106 | * because the XOR operation can combine them all while trying to reduce the | |
2107 | * noise as much as possible. | |
2108 | * | |
2109 | * Returns the checksum of the global table of a given originator. | |
ced72933 | 2110 | */ |
6b5e971a SE |
2111 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2112 | struct batadv_orig_node *orig_node, | |
2113 | unsigned short vid) | |
a73105b8 | 2114 | { |
807736f6 | 2115 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2116 | struct batadv_tt_common_entry *tt_common; |
2117 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2118 | struct hlist_head *head; |
6b5e971a SE |
2119 | u32 i, crc_tmp, crc = 0; |
2120 | u8 flags; | |
a30e22ca | 2121 | __be16 tmp_vid; |
a73105b8 AQ |
2122 | |
2123 | for (i = 0; i < hash->size; i++) { | |
2124 | head = &hash->table[i]; | |
2125 | ||
2126 | rcu_read_lock(); | |
b67bfe0d | 2127 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2128 | tt_global = container_of(tt_common, |
2129 | struct batadv_tt_global_entry, | |
2130 | common); | |
7ea7b4a1 AQ |
2131 | /* compute the CRC only for entries belonging to the |
2132 | * VLAN identified by the vid passed as parameter | |
2133 | */ | |
2134 | if (tt_common->vid != vid) | |
2135 | continue; | |
2136 | ||
db08e6e5 SW |
2137 | /* Roaming clients are in the global table for |
2138 | * consistency only. They don't have to be | |
2139 | * taken into account while computing the | |
2140 | * global crc | |
2141 | */ | |
acd34afa | 2142 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2143 | continue; |
30cfd02b AQ |
2144 | /* Temporary clients have not been announced yet, so |
2145 | * they have to be skipped while computing the global | |
2146 | * crc | |
2147 | */ | |
2148 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2149 | continue; | |
db08e6e5 SW |
2150 | |
2151 | /* find out if this global entry is announced by this | |
2152 | * originator | |
2153 | */ | |
56303d34 | 2154 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2155 | orig_node)) |
db08e6e5 SW |
2156 | continue; |
2157 | ||
a30e22ca AQ |
2158 | /* use network order to read the VID: this ensures that |
2159 | * every node reads the bytes in the same order. | |
2160 | */ | |
2161 | tmp_vid = htons(tt_common->vid); | |
2162 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2163 | |
2164 | /* compute the CRC on flags that have to be kept in sync | |
2165 | * among nodes | |
2166 | */ | |
2167 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2168 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2169 | ||
0ffa9e8d | 2170 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2171 | } |
2172 | rcu_read_unlock(); | |
2173 | } | |
2174 | ||
ced72933 | 2175 | return crc; |
a73105b8 AQ |
2176 | } |
2177 | ||
ced72933 AQ |
2178 | /** |
2179 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2180 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2181 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2182 | * |
2183 | * For details about the computation, please refer to the documentation for | |
2184 | * batadv_tt_global_crc(). | |
2185 | * | |
2186 | * Returns the checksum of the local table | |
ced72933 | 2187 | */ |
6b5e971a SE |
2188 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2189 | unsigned short vid) | |
a73105b8 | 2190 | { |
807736f6 | 2191 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2192 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2193 | struct hlist_head *head; |
6b5e971a SE |
2194 | u32 i, crc_tmp, crc = 0; |
2195 | u8 flags; | |
a30e22ca | 2196 | __be16 tmp_vid; |
a73105b8 AQ |
2197 | |
2198 | for (i = 0; i < hash->size; i++) { | |
2199 | head = &hash->table[i]; | |
2200 | ||
2201 | rcu_read_lock(); | |
b67bfe0d | 2202 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2203 | /* compute the CRC only for entries belonging to the |
2204 | * VLAN identified by vid | |
2205 | */ | |
2206 | if (tt_common->vid != vid) | |
2207 | continue; | |
2208 | ||
058d0e26 | 2209 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2210 | * account while computing the CRC |
2211 | */ | |
acd34afa | 2212 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2213 | continue; |
ced72933 | 2214 | |
a30e22ca AQ |
2215 | /* use network order to read the VID: this ensures that |
2216 | * every node reads the bytes in the same order. | |
2217 | */ | |
2218 | tmp_vid = htons(tt_common->vid); | |
2219 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2220 | |
2221 | /* compute the CRC on flags that have to be kept in sync | |
2222 | * among nodes | |
2223 | */ | |
2224 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2225 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2226 | ||
0ffa9e8d | 2227 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2228 | } |
a73105b8 AQ |
2229 | rcu_read_unlock(); |
2230 | } | |
2231 | ||
ced72933 | 2232 | return crc; |
a73105b8 AQ |
2233 | } |
2234 | ||
56303d34 | 2235 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2236 | { |
7c26a53b ML |
2237 | struct batadv_tt_req_node *node; |
2238 | struct hlist_node *safe; | |
a73105b8 | 2239 | |
807736f6 | 2240 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2241 | |
7c26a53b ML |
2242 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2243 | hlist_del_init(&node->list); | |
a73105b8 AQ |
2244 | kfree(node); |
2245 | } | |
2246 | ||
807736f6 | 2247 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2248 | } |
2249 | ||
56303d34 SE |
2250 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2251 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2252 | const void *tt_buff, |
6b5e971a | 2253 | u16 tt_buff_len) |
a73105b8 | 2254 | { |
a73105b8 | 2255 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2256 | * last OGM (the OGM could carry no changes) |
2257 | */ | |
a73105b8 AQ |
2258 | spin_lock_bh(&orig_node->tt_buff_lock); |
2259 | if (tt_buff_len > 0) { | |
2260 | kfree(orig_node->tt_buff); | |
2261 | orig_node->tt_buff_len = 0; | |
2262 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2263 | if (orig_node->tt_buff) { | |
2264 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2265 | orig_node->tt_buff_len = tt_buff_len; | |
2266 | } | |
2267 | } | |
2268 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2269 | } | |
2270 | ||
56303d34 | 2271 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2272 | { |
7c26a53b ML |
2273 | struct batadv_tt_req_node *node; |
2274 | struct hlist_node *safe; | |
a73105b8 | 2275 | |
807736f6 | 2276 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2277 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2278 | if (batadv_has_timed_out(node->issued_at, |
2279 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2280 | hlist_del_init(&node->list); |
a73105b8 AQ |
2281 | kfree(node); |
2282 | } | |
2283 | } | |
807736f6 | 2284 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2285 | } |
2286 | ||
383b8636 ML |
2287 | /** |
2288 | * batadv_tt_req_node_new - search and possibly create a tt_req_node object | |
2289 | * @bat_priv: the bat priv with all the soft interface information | |
2290 | * @orig_node: orig node this request is being issued for | |
2291 | * | |
2292 | * Returns the pointer to the new tt_req_node struct if no request | |
2293 | * has already been issued for this orig_node, NULL otherwise. | |
9cfc7bd6 | 2294 | */ |
56303d34 | 2295 | static struct batadv_tt_req_node * |
383b8636 | 2296 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2297 | struct batadv_orig_node *orig_node) |
a73105b8 | 2298 | { |
56303d34 | 2299 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2300 | |
807736f6 | 2301 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2302 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2303 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2304 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2305 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2306 | goto unlock; |
2307 | } | |
2308 | ||
2309 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2310 | if (!tt_req_node) | |
2311 | goto unlock; | |
2312 | ||
8fdd0153 | 2313 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2314 | tt_req_node->issued_at = jiffies; |
2315 | ||
7c26a53b | 2316 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2317 | unlock: |
807736f6 | 2318 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2319 | return tt_req_node; |
2320 | } | |
2321 | ||
335fbe0f ML |
2322 | /** |
2323 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2324 | * @entry_ptr: to be checked local tt entry | |
2325 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2326 | * | |
2327 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2328 | */ | |
2329 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2330 | { |
56303d34 | 2331 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2332 | |
acd34afa | 2333 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2334 | return 0; |
2335 | return 1; | |
2336 | } | |
2337 | ||
a513088d SE |
2338 | static int batadv_tt_global_valid(const void *entry_ptr, |
2339 | const void *data_ptr) | |
a73105b8 | 2340 | { |
56303d34 SE |
2341 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2342 | const struct batadv_tt_global_entry *tt_global_entry; | |
2343 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2344 | |
30cfd02b AQ |
2345 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2346 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2347 | return 0; |
2348 | ||
56303d34 SE |
2349 | tt_global_entry = container_of(tt_common_entry, |
2350 | struct batadv_tt_global_entry, | |
48100bac AQ |
2351 | common); |
2352 | ||
a513088d | 2353 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2354 | } |
2355 | ||
335fbe0f | 2356 | /** |
7ea7b4a1 AQ |
2357 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2358 | * specified tt hash | |
335fbe0f ML |
2359 | * @bat_priv: the bat priv with all the soft interface information |
2360 | * @hash: hash table containing the tt entries | |
2361 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2362 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2363 | * @valid_cb: function to filter tt change entries |
2364 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2365 | */ |
7ea7b4a1 AQ |
2366 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2367 | struct batadv_hashtable *hash, | |
6b5e971a | 2368 | void *tvlv_buff, u16 tt_len, |
7ea7b4a1 AQ |
2369 | int (*valid_cb)(const void *, const void *), |
2370 | void *cb_data) | |
a73105b8 | 2371 | { |
56303d34 | 2372 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2373 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2374 | struct hlist_head *head; |
6b5e971a SE |
2375 | u16 tt_tot, tt_num_entries = 0; |
2376 | u32 i; | |
a73105b8 | 2377 | |
298e6e68 | 2378 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2379 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2380 | |
2381 | rcu_read_lock(); | |
2382 | for (i = 0; i < hash->size; i++) { | |
2383 | head = &hash->table[i]; | |
2384 | ||
b67bfe0d | 2385 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2386 | head, hash_entry) { |
335fbe0f | 2387 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2388 | break; |
2389 | ||
48100bac | 2390 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2391 | continue; |
2392 | ||
8fdd0153 | 2393 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2394 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2395 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2396 | memset(tt_change->reserved, 0, |
2397 | sizeof(tt_change->reserved)); | |
a73105b8 | 2398 | |
335fbe0f | 2399 | tt_num_entries++; |
a73105b8 AQ |
2400 | tt_change++; |
2401 | } | |
2402 | } | |
2403 | rcu_read_unlock(); | |
7ea7b4a1 | 2404 | } |
a73105b8 | 2405 | |
7ea7b4a1 AQ |
2406 | /** |
2407 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2408 | * @orig_node: originator for which the CRCs have to be checked | |
2409 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2410 | * @num_vlan: number of tvlv VLAN entries | |
2411 | * @create: if true, create VLAN objects if not found | |
2412 | * | |
2413 | * Return true if all the received CRCs match the locally stored ones, false | |
2414 | * otherwise | |
2415 | */ | |
2416 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2417 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2418 | u16 num_vlan) |
7ea7b4a1 AQ |
2419 | { |
2420 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2421 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 2422 | int i, orig_num_vlan; |
6b5e971a | 2423 | u32 crc; |
7ea7b4a1 AQ |
2424 | |
2425 | /* check if each received CRC matches the locally stored one */ | |
2426 | for (i = 0; i < num_vlan; i++) { | |
2427 | tt_vlan_tmp = tt_vlan + i; | |
2428 | ||
2429 | /* if orig_node is a backbone node for this VLAN, don't check | |
2430 | * the CRC as we ignore all the global entries over it | |
2431 | */ | |
2432 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2433 | orig_node->orig, |
2434 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2435 | continue; |
2436 | ||
2437 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2438 | ntohs(tt_vlan_tmp->vid)); | |
2439 | if (!vlan) | |
2440 | return false; | |
2441 | ||
91c2b1a9 AQ |
2442 | crc = vlan->tt.crc; |
2443 | batadv_orig_node_vlan_free_ref(vlan); | |
2444 | ||
2445 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2446 | return false; |
2447 | } | |
2448 | ||
c169c59d SW |
2449 | /* check if any excess VLANs exist locally for the originator |
2450 | * which are not mentioned in the TVLV from the originator. | |
2451 | */ | |
2452 | rcu_read_lock(); | |
2453 | orig_num_vlan = 0; | |
2454 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
2455 | orig_num_vlan++; | |
2456 | rcu_read_unlock(); | |
2457 | ||
2458 | if (orig_num_vlan > num_vlan) | |
2459 | return false; | |
2460 | ||
7ea7b4a1 AQ |
2461 | return true; |
2462 | } | |
2463 | ||
2464 | /** | |
2465 | * batadv_tt_local_update_crc - update all the local CRCs | |
2466 | * @bat_priv: the bat priv with all the soft interface information | |
2467 | */ | |
2468 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2469 | { | |
2470 | struct batadv_softif_vlan *vlan; | |
2471 | ||
2472 | /* recompute the global CRC for each VLAN */ | |
2473 | rcu_read_lock(); | |
2474 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2475 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2476 | } | |
2477 | rcu_read_unlock(); | |
2478 | } | |
2479 | ||
2480 | /** | |
2481 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2482 | * @bat_priv: the bat priv with all the soft interface information | |
2483 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2484 | */ | |
2485 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2486 | struct batadv_orig_node *orig_node) | |
2487 | { | |
2488 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2489 | u32 crc; |
7ea7b4a1 AQ |
2490 | |
2491 | /* recompute the global CRC for each VLAN */ | |
2492 | rcu_read_lock(); | |
d0fa4f3f | 2493 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
2494 | /* if orig_node is a backbone node for this VLAN, don't compute |
2495 | * the CRC as we ignore all the global entries over it | |
2496 | */ | |
cfd4f757 AQ |
2497 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2498 | vlan->vid)) | |
7ea7b4a1 AQ |
2499 | continue; |
2500 | ||
2501 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2502 | vlan->tt.crc = crc; | |
2503 | } | |
2504 | rcu_read_unlock(); | |
a73105b8 AQ |
2505 | } |
2506 | ||
ced72933 AQ |
2507 | /** |
2508 | * batadv_send_tt_request - send a TT Request message to a given node | |
2509 | * @bat_priv: the bat priv with all the soft interface information | |
2510 | * @dst_orig_node: the destination of the message | |
2511 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2512 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2513 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2514 | * @full_table: ask for the entire translation table if true, while only for the |
2515 | * last TT diff otherwise | |
2516 | */ | |
56303d34 SE |
2517 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2518 | struct batadv_orig_node *dst_orig_node, | |
6b5e971a | 2519 | u8 ttvn, |
7ea7b4a1 | 2520 | struct batadv_tvlv_tt_vlan_data *tt_vlan, |
6b5e971a | 2521 | u16 num_vlan, bool full_table) |
a73105b8 | 2522 | { |
335fbe0f | 2523 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2524 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2525 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2526 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2527 | bool ret = false; |
7ea7b4a1 | 2528 | int i, size; |
a73105b8 | 2529 | |
e5d89254 | 2530 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2531 | if (!primary_if) |
2532 | goto out; | |
2533 | ||
2534 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2535 | * reply from the same orig_node yet |
2536 | */ | |
383b8636 | 2537 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
2538 | if (!tt_req_node) |
2539 | goto out; | |
2540 | ||
7ea7b4a1 AQ |
2541 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2542 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2543 | if (!tvlv_tt_data) |
a73105b8 AQ |
2544 | goto out; |
2545 | ||
335fbe0f ML |
2546 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2547 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2548 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2549 | ||
2550 | /* send all the CRCs within the request. This is needed by intermediate | |
2551 | * nodes to ensure they have the correct table before replying | |
2552 | */ | |
2553 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2554 | for (i = 0; i < num_vlan; i++) { | |
2555 | tt_vlan_req->vid = tt_vlan->vid; | |
2556 | tt_vlan_req->crc = tt_vlan->crc; | |
2557 | ||
2558 | tt_vlan_req++; | |
2559 | tt_vlan++; | |
2560 | } | |
a73105b8 AQ |
2561 | |
2562 | if (full_table) | |
335fbe0f | 2563 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2564 | |
bb351ba0 | 2565 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2566 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2567 | |
d69909d2 | 2568 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2569 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2570 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2571 | tvlv_tt_data, size); |
335fbe0f | 2572 | ret = true; |
a73105b8 AQ |
2573 | |
2574 | out: | |
a73105b8 | 2575 | if (primary_if) |
e5d89254 | 2576 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2577 | if (ret && tt_req_node) { |
807736f6 | 2578 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b ML |
2579 | /* hlist_del_init() verifies tt_req_node still is in the list */ |
2580 | hlist_del_init(&tt_req_node->list); | |
807736f6 | 2581 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2582 | kfree(tt_req_node); |
2583 | } | |
335fbe0f | 2584 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2585 | return ret; |
2586 | } | |
2587 | ||
335fbe0f ML |
2588 | /** |
2589 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2590 | * node's translation table | |
2591 | * @bat_priv: the bat priv with all the soft interface information | |
2592 | * @tt_data: tt data containing the tt request information | |
2593 | * @req_src: mac address of tt request sender | |
2594 | * @req_dst: mac address of tt request recipient | |
2595 | * | |
2596 | * Returns true if tt request reply was sent, false otherwise. | |
2597 | */ | |
2598 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2599 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2600 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2601 | { |
170173bf | 2602 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2603 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2604 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2605 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2606 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2607 | bool ret = false, full_table; |
6b5e971a SE |
2608 | u8 orig_ttvn, req_ttvn; |
2609 | u16 tvlv_len; | |
2610 | s32 tt_len; | |
a73105b8 | 2611 | |
39c75a51 | 2612 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2613 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 2614 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 2615 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
2616 | |
2617 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2618 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2619 | if (!req_dst_orig_node) |
2620 | goto out; | |
2621 | ||
335fbe0f | 2622 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2623 | if (!res_dst_orig_node) |
2624 | goto out; | |
2625 | ||
6b5e971a | 2626 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2627 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2628 | |
7ea7b4a1 | 2629 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2630 | /* this node doesn't have the requested data */ |
a73105b8 | 2631 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2632 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2633 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2634 | goto out; |
2635 | ||
015758d0 | 2636 | /* If the full table has been explicitly requested */ |
335fbe0f | 2637 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2638 | !req_dst_orig_node->tt_buff) |
2639 | full_table = true; | |
2640 | else | |
2641 | full_table = false; | |
2642 | ||
335fbe0f ML |
2643 | /* TT fragmentation hasn't been implemented yet, so send as many |
2644 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2645 | */ |
a73105b8 AQ |
2646 | if (!full_table) { |
2647 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2648 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2649 | |
7ea7b4a1 AQ |
2650 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2651 | &tvlv_tt_data, | |
2652 | &tt_change, | |
2653 | &tt_len); | |
2654 | if (!tt_len) | |
a73105b8 AQ |
2655 | goto unlock; |
2656 | ||
a73105b8 | 2657 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2658 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2659 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2660 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2661 | } else { | |
7ea7b4a1 AQ |
2662 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2663 | * in the initial part | |
2664 | */ | |
2665 | tt_len = -1; | |
2666 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2667 | &tvlv_tt_data, | |
2668 | &tt_change, | |
2669 | &tt_len); | |
2670 | if (!tt_len) | |
a73105b8 | 2671 | goto out; |
7ea7b4a1 AQ |
2672 | |
2673 | /* fill the rest of the tvlv with the real TT entries */ | |
2674 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2675 | tt_change, tt_len, | |
2676 | batadv_tt_global_valid, | |
2677 | req_dst_orig_node); | |
a73105b8 AQ |
2678 | } |
2679 | ||
a19d3d85 ML |
2680 | /* Don't send the response, if larger than fragmented packet. */ |
2681 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2682 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2683 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2684 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2685 | res_dst_orig_node->orig); | |
2686 | goto out; | |
2687 | } | |
2688 | ||
335fbe0f ML |
2689 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2690 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2691 | |
2692 | if (full_table) | |
335fbe0f | 2693 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2694 | |
39c75a51 | 2695 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2696 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2697 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2698 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2699 | |
d69909d2 | 2700 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2701 | |
335fbe0f | 2702 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2703 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2704 | tvlv_len); | |
e91ecfc6 | 2705 | |
335fbe0f | 2706 | ret = true; |
a73105b8 AQ |
2707 | goto out; |
2708 | ||
2709 | unlock: | |
2710 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2711 | ||
2712 | out: | |
2713 | if (res_dst_orig_node) | |
7d211efc | 2714 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2715 | if (req_dst_orig_node) |
7d211efc | 2716 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2717 | kfree(tvlv_tt_data); |
a73105b8 | 2718 | return ret; |
a73105b8 | 2719 | } |
96412690 | 2720 | |
335fbe0f ML |
2721 | /** |
2722 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2723 | * translation table | |
2724 | * @bat_priv: the bat priv with all the soft interface information | |
2725 | * @tt_data: tt data containing the tt request information | |
2726 | * @req_src: mac address of tt request sender | |
2727 | * | |
2728 | * Returns true if tt request reply was sent, false otherwise. | |
2729 | */ | |
2730 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2731 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2732 | u8 *req_src) |
a73105b8 | 2733 | { |
335fbe0f | 2734 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2735 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2736 | struct batadv_tvlv_tt_change *tt_change; |
2737 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
2738 | u8 my_ttvn, req_ttvn; |
2739 | u16 tvlv_len; | |
a73105b8 | 2740 | bool full_table; |
6b5e971a | 2741 | s32 tt_len; |
a73105b8 | 2742 | |
39c75a51 | 2743 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2744 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 2745 | req_src, tt_data->ttvn, |
a2f2b6cd | 2746 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2747 | |
a70a9aa9 | 2748 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2749 | |
6b5e971a | 2750 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2751 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2752 | |
335fbe0f | 2753 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2754 | if (!orig_node) |
2755 | goto out; | |
2756 | ||
e5d89254 | 2757 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2758 | if (!primary_if) |
2759 | goto out; | |
2760 | ||
2761 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2762 | * is too big send the whole local translation table |
2763 | */ | |
335fbe0f | 2764 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2765 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2766 | full_table = true; |
2767 | else | |
2768 | full_table = false; | |
2769 | ||
335fbe0f ML |
2770 | /* TT fragmentation hasn't been implemented yet, so send as many |
2771 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2772 | */ |
a73105b8 | 2773 | if (!full_table) { |
807736f6 | 2774 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2775 | |
7ea7b4a1 AQ |
2776 | tt_len = bat_priv->tt.last_changeset_len; |
2777 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2778 | &tvlv_tt_data, | |
2779 | &tt_change, | |
2780 | &tt_len); | |
2781 | if (!tt_len) | |
a73105b8 AQ |
2782 | goto unlock; |
2783 | ||
335fbe0f | 2784 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2785 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2786 | bat_priv->tt.last_changeset_len); |
2787 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2788 | } else { |
6b5e971a | 2789 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2790 | |
7ea7b4a1 AQ |
2791 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2792 | * in the initial part | |
2793 | */ | |
2794 | tt_len = -1; | |
2795 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2796 | &tvlv_tt_data, | |
2797 | &tt_change, | |
2798 | &tt_len); | |
2799 | if (!tt_len) | |
a73105b8 | 2800 | goto out; |
7ea7b4a1 AQ |
2801 | |
2802 | /* fill the rest of the tvlv with the real TT entries */ | |
2803 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2804 | tt_change, tt_len, | |
2805 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2806 | } |
2807 | ||
335fbe0f ML |
2808 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2809 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2810 | |
2811 | if (full_table) | |
335fbe0f | 2812 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2813 | |
39c75a51 | 2814 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2815 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2816 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2817 | |
d69909d2 | 2818 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2819 | |
335fbe0f | 2820 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2821 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2822 | tvlv_len); | |
335fbe0f | 2823 | |
a73105b8 AQ |
2824 | goto out; |
2825 | ||
2826 | unlock: | |
807736f6 | 2827 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2828 | out: |
a70a9aa9 | 2829 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2830 | if (orig_node) |
7d211efc | 2831 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2832 | if (primary_if) |
e5d89254 | 2833 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2834 | kfree(tvlv_tt_data); |
2835 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2836 | return true; |
2837 | } | |
2838 | ||
335fbe0f ML |
2839 | /** |
2840 | * batadv_send_tt_response - send reply to tt request | |
2841 | * @bat_priv: the bat priv with all the soft interface information | |
2842 | * @tt_data: tt data containing the tt request information | |
2843 | * @req_src: mac address of tt request sender | |
2844 | * @req_dst: mac address of tt request recipient | |
2845 | * | |
2846 | * Returns true if tt request reply was sent, false otherwise. | |
2847 | */ | |
2848 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2849 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2850 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2851 | { |
cfd4f757 | 2852 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2853 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
2854 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
2855 | req_dst); | |
a73105b8 AQ |
2856 | } |
2857 | ||
56303d34 SE |
2858 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2859 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2860 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 2861 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
2862 | { |
2863 | int i; | |
a513088d | 2864 | int roams; |
a73105b8 AQ |
2865 | |
2866 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2867 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2868 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2869 | batadv_tt_global_del(bat_priv, orig_node, |
2870 | (tt_change + i)->addr, | |
c018ad3d | 2871 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2872 | "tt removed by changes", |
2873 | roams); | |
08c36d3e | 2874 | } else { |
08c36d3e | 2875 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2876 | (tt_change + i)->addr, |
c018ad3d | 2877 | ntohs((tt_change + i)->vid), |
d4f44692 | 2878 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2879 | /* In case of problem while storing a |
2880 | * global_entry, we stop the updating | |
2881 | * procedure without committing the | |
2882 | * ttvn change. This will avoid to send | |
2883 | * corrupted data on tt_request | |
2884 | */ | |
2885 | return; | |
08c36d3e | 2886 | } |
a73105b8 | 2887 | } |
ac4eebd4 | 2888 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
2889 | } |
2890 | ||
56303d34 | 2891 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 2892 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
2893 | u8 ttvn, u8 *resp_src, |
2894 | u16 num_entries) | |
a73105b8 | 2895 | { |
170173bf | 2896 | struct batadv_orig_node *orig_node; |
a73105b8 | 2897 | |
335fbe0f | 2898 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2899 | if (!orig_node) |
2900 | goto out; | |
2901 | ||
2902 | /* Purge the old table first.. */ | |
95fb130d AQ |
2903 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2904 | "Received full table"); | |
a73105b8 | 2905 | |
7ea7b4a1 AQ |
2906 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2907 | ttvn); | |
a73105b8 AQ |
2908 | |
2909 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2910 | kfree(orig_node->tt_buff); | |
2911 | orig_node->tt_buff_len = 0; | |
2912 | orig_node->tt_buff = NULL; | |
2913 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2914 | ||
7ea7b4a1 | 2915 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2916 | |
2917 | out: | |
2918 | if (orig_node) | |
7d211efc | 2919 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2920 | } |
2921 | ||
56303d34 SE |
2922 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2923 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2924 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 2925 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2926 | { |
a513088d SE |
2927 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2928 | tt_num_changes, ttvn); | |
a73105b8 | 2929 | |
e8cf234a AQ |
2930 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2931 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2932 | atomic_set(&orig_node->last_ttvn, ttvn); |
2933 | } | |
2934 | ||
c018ad3d AQ |
2935 | /** |
2936 | * batadv_is_my_client - check if a client is served by the local node | |
2937 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 2938 | * @addr: the mac address of the client to check |
c018ad3d AQ |
2939 | * @vid: VLAN identifier |
2940 | * | |
2941 | * Returns true if the client is served by this node, false otherwise. | |
2942 | */ | |
6b5e971a | 2943 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 2944 | unsigned short vid) |
a73105b8 | 2945 | { |
170173bf | 2946 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2947 | bool ret = false; |
a73105b8 | 2948 | |
c018ad3d | 2949 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2950 | if (!tt_local_entry) |
2951 | goto out; | |
058d0e26 | 2952 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2953 | * consistency purpose) |
2954 | */ | |
7c1fd91d AQ |
2955 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2956 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2957 | goto out; |
7683fdc1 AQ |
2958 | ret = true; |
2959 | out: | |
a73105b8 | 2960 | if (tt_local_entry) |
a513088d | 2961 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2962 | return ret; |
a73105b8 AQ |
2963 | } |
2964 | ||
335fbe0f ML |
2965 | /** |
2966 | * batadv_handle_tt_response - process incoming tt reply | |
2967 | * @bat_priv: the bat priv with all the soft interface information | |
2968 | * @tt_data: tt data containing the tt request information | |
2969 | * @resp_src: mac address of tt reply sender | |
2970 | * @num_entries: number of tt change entries appended to the tt data | |
2971 | */ | |
2972 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2973 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2974 | u8 *resp_src, u16 num_entries) |
a73105b8 | 2975 | { |
7c26a53b ML |
2976 | struct batadv_tt_req_node *node; |
2977 | struct hlist_node *safe; | |
56303d34 | 2978 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 2979 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
2980 | u8 *tvlv_ptr = (u8 *)tt_data; |
2981 | u16 change_offset; | |
a73105b8 | 2982 | |
39c75a51 | 2983 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2984 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 2985 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 2986 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2987 | |
335fbe0f | 2988 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2989 | if (!orig_node) |
2990 | goto out; | |
2991 | ||
a70a9aa9 AQ |
2992 | spin_lock_bh(&orig_node->tt_lock); |
2993 | ||
7ea7b4a1 AQ |
2994 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2995 | change_offset *= ntohs(tt_data->num_vlan); | |
2996 | change_offset += sizeof(*tt_data); | |
2997 | tvlv_ptr += change_offset; | |
2998 | ||
2999 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 3000 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
3001 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3002 | resp_src, num_entries); | |
96412690 | 3003 | } else { |
335fbe0f ML |
3004 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3005 | tt_data->ttvn, tt_change); | |
96412690 | 3006 | } |
a73105b8 | 3007 | |
a70a9aa9 | 3008 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3009 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3010 | |
3011 | spin_unlock_bh(&orig_node->tt_lock); | |
3012 | ||
a73105b8 | 3013 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3014 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3015 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3016 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3017 | continue; |
7c26a53b | 3018 | hlist_del_init(&node->list); |
a73105b8 AQ |
3019 | kfree(node); |
3020 | } | |
7ea7b4a1 | 3021 | |
807736f6 | 3022 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3023 | out: |
3024 | if (orig_node) | |
7d211efc | 3025 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
3026 | } |
3027 | ||
56303d34 | 3028 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3029 | { |
56303d34 | 3030 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3031 | |
807736f6 | 3032 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3033 | |
807736f6 | 3034 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
3035 | list_del(&node->list); |
3036 | kfree(node); | |
3037 | } | |
3038 | ||
807736f6 | 3039 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3040 | } |
3041 | ||
56303d34 | 3042 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3043 | { |
56303d34 | 3044 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3045 | |
807736f6 SE |
3046 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3047 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3048 | if (!batadv_has_timed_out(node->first_time, |
3049 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3050 | continue; |
3051 | ||
3052 | list_del(&node->list); | |
3053 | kfree(node); | |
3054 | } | |
807736f6 | 3055 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3056 | } |
3057 | ||
3058 | /* This function checks whether the client already reached the | |
3059 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
3060 | * will not be sent. | |
3061 | * | |
9cfc7bd6 SE |
3062 | * returns true if the ROAMING_ADV can be sent, false otherwise |
3063 | */ | |
6b5e971a | 3064 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3065 | { |
56303d34 | 3066 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3067 | bool ret = false; |
3068 | ||
807736f6 | 3069 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3070 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3071 | * reply from the same orig_node yet |
3072 | */ | |
807736f6 | 3073 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3074 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3075 | continue; |
3076 | ||
1eda58bf | 3077 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3078 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3079 | continue; |
3080 | ||
3e34819e | 3081 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3082 | /* Sorry, you roamed too many times! */ |
3083 | goto unlock; | |
3084 | ret = true; | |
3085 | break; | |
3086 | } | |
3087 | ||
3088 | if (!ret) { | |
3089 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
3090 | if (!tt_roam_node) | |
3091 | goto unlock; | |
3092 | ||
3093 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3094 | atomic_set(&tt_roam_node->counter, |
3095 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3096 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3097 | |
807736f6 | 3098 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3099 | ret = true; |
3100 | } | |
3101 | ||
3102 | unlock: | |
807736f6 | 3103 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3104 | return ret; |
3105 | } | |
3106 | ||
c018ad3d AQ |
3107 | /** |
3108 | * batadv_send_roam_adv - send a roaming advertisement message | |
3109 | * @bat_priv: the bat priv with all the soft interface information | |
3110 | * @client: mac address of the roaming client | |
3111 | * @vid: VLAN identifier | |
3112 | * @orig_node: message destination | |
3113 | * | |
3114 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3115 | * client. This is done to inform the node that from now on all traffic destined | |
3116 | * for this particular roamed client has to be forwarded to the sender of the | |
3117 | * roaming message. | |
3118 | */ | |
6b5e971a | 3119 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3120 | unsigned short vid, |
56303d34 | 3121 | struct batadv_orig_node *orig_node) |
cc47f66e | 3122 | { |
56303d34 | 3123 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3124 | struct batadv_tvlv_roam_adv tvlv_roam; |
3125 | ||
3126 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3127 | if (!primary_if) | |
3128 | goto out; | |
cc47f66e AQ |
3129 | |
3130 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3131 | * already roamed to us too many times |
3132 | */ | |
a513088d | 3133 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3134 | goto out; |
3135 | ||
39c75a51 | 3136 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3137 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3138 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3139 | |
d69909d2 | 3140 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3141 | |
122edaa0 | 3142 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3143 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3144 | |
3145 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3146 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3147 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3148 | |
3149 | out: | |
122edaa0 ML |
3150 | if (primary_if) |
3151 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
3152 | } |
3153 | ||
a513088d | 3154 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3155 | { |
56303d34 | 3156 | struct delayed_work *delayed_work; |
807736f6 | 3157 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3158 | struct batadv_priv *bat_priv; |
3159 | ||
3160 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3161 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3162 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3163 | |
a19d3d85 | 3164 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3165 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3166 | batadv_tt_req_purge(bat_priv); |
3167 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3168 | |
72414442 AQ |
3169 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3170 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3171 | } |
cc47f66e | 3172 | |
56303d34 | 3173 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3174 | { |
e1bf0c14 ML |
3175 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3176 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3177 | ||
807736f6 | 3178 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3179 | |
a513088d SE |
3180 | batadv_tt_local_table_free(bat_priv); |
3181 | batadv_tt_global_table_free(bat_priv); | |
3182 | batadv_tt_req_list_free(bat_priv); | |
3183 | batadv_tt_changes_list_free(bat_priv); | |
3184 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3185 | |
807736f6 | 3186 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3187 | } |
058d0e26 | 3188 | |
7ea7b4a1 AQ |
3189 | /** |
3190 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3191 | * table and possibly count them in the TT size | |
3192 | * @bat_priv: the bat priv with all the soft interface information | |
3193 | * @flags: the flag to switch | |
3194 | * @enable: whether to set or unset the flag | |
3195 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3196 | */ |
6b5e971a SE |
3197 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3198 | bool enable, bool count) | |
058d0e26 | 3199 | { |
7ea7b4a1 AQ |
3200 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3201 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 3202 | u16 changed_num = 0; |
058d0e26 | 3203 | struct hlist_head *head; |
6b5e971a | 3204 | u32 i; |
058d0e26 AQ |
3205 | |
3206 | if (!hash) | |
7ea7b4a1 | 3207 | return; |
058d0e26 AQ |
3208 | |
3209 | for (i = 0; i < hash->size; i++) { | |
3210 | head = &hash->table[i]; | |
3211 | ||
3212 | rcu_read_lock(); | |
b67bfe0d | 3213 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3214 | head, hash_entry) { |
697f2531 AQ |
3215 | if (enable) { |
3216 | if ((tt_common_entry->flags & flags) == flags) | |
3217 | continue; | |
3218 | tt_common_entry->flags |= flags; | |
3219 | } else { | |
3220 | if (!(tt_common_entry->flags & flags)) | |
3221 | continue; | |
3222 | tt_common_entry->flags &= ~flags; | |
3223 | } | |
3224 | changed_num++; | |
7ea7b4a1 AQ |
3225 | |
3226 | if (!count) | |
3227 | continue; | |
3228 | ||
3229 | batadv_tt_local_size_inc(bat_priv, | |
3230 | tt_common_entry->vid); | |
058d0e26 AQ |
3231 | } |
3232 | rcu_read_unlock(); | |
3233 | } | |
058d0e26 AQ |
3234 | } |
3235 | ||
acd34afa | 3236 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3237 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3238 | { |
807736f6 | 3239 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3240 | struct batadv_tt_common_entry *tt_common; |
3241 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 3242 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 3243 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3244 | struct hlist_head *head; |
3245 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3246 | u32 i; |
058d0e26 AQ |
3247 | |
3248 | if (!hash) | |
3249 | return; | |
3250 | ||
3251 | for (i = 0; i < hash->size; i++) { | |
3252 | head = &hash->table[i]; | |
3253 | list_lock = &hash->list_locks[i]; | |
3254 | ||
3255 | spin_lock_bh(list_lock); | |
b67bfe0d | 3256 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3257 | hash_entry) { |
3258 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3259 | continue; |
3260 | ||
39c75a51 | 3261 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3262 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3263 | tt_common->addr, | |
3264 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3265 | |
7ea7b4a1 | 3266 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3267 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3268 | tt_local = container_of(tt_common, |
3269 | struct batadv_tt_local_entry, | |
3270 | common); | |
35df3b29 AQ |
3271 | |
3272 | /* decrease the reference held for this vlan */ | |
3273 | vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid); | |
354136bc ML |
3274 | if (vlan) { |
3275 | batadv_softif_vlan_free_ref(vlan); | |
3276 | batadv_softif_vlan_free_ref(vlan); | |
3277 | } | |
35df3b29 | 3278 | |
56303d34 | 3279 | batadv_tt_local_entry_free_ref(tt_local); |
058d0e26 AQ |
3280 | } |
3281 | spin_unlock_bh(list_lock); | |
3282 | } | |
058d0e26 AQ |
3283 | } |
3284 | ||
e1bf0c14 | 3285 | /** |
a19d3d85 ML |
3286 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3287 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3288 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3289 | * |
3290 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3291 | */ |
a19d3d85 | 3292 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3293 | { |
5274cd68 SE |
3294 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3295 | ||
c5caf4ef LL |
3296 | /* Update multicast addresses in local translation table */ |
3297 | batadv_mcast_mla_update(bat_priv); | |
3298 | ||
e1bf0c14 ML |
3299 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3300 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3301 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3302 | return; |
e1bf0c14 | 3303 | } |
be9aa4c1 | 3304 | |
7ea7b4a1 | 3305 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3306 | |
a513088d | 3307 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3308 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3309 | |
3310 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3311 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3312 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3313 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3314 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3315 | |
3316 | /* reset the sending counter */ | |
807736f6 | 3317 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3318 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3319 | } |
a70a9aa9 | 3320 | |
a19d3d85 ML |
3321 | /** |
3322 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3323 | * have been queued in the time since the last commit | |
3324 | * @bat_priv: the bat priv with all the soft interface information | |
3325 | */ | |
3326 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3327 | { | |
3328 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3329 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3330 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3331 | } |
59b699cd | 3332 | |
6b5e971a SE |
3333 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3334 | unsigned short vid) | |
59b699cd | 3335 | { |
56303d34 SE |
3336 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3337 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3338 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3339 | bool ret = false; |
59b699cd | 3340 | |
b8cbd81d | 3341 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3342 | if (!vlan) |
3343 | return false; | |
3344 | ||
3345 | if (!atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3346 | goto out; |
59b699cd | 3347 | |
b8cbd81d | 3348 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3349 | if (!tt_local_entry) |
3350 | goto out; | |
3351 | ||
b8cbd81d | 3352 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3353 | if (!tt_global_entry) |
3354 | goto out; | |
3355 | ||
1f129fef | 3356 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3357 | goto out; |
3358 | ||
5870adc6 | 3359 | ret = true; |
59b699cd AQ |
3360 | |
3361 | out: | |
f75a33ae | 3362 | batadv_softif_vlan_free_ref(vlan); |
59b699cd | 3363 | if (tt_global_entry) |
a513088d | 3364 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3365 | if (tt_local_entry) |
a513088d | 3366 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3367 | return ret; |
3368 | } | |
a943cac1 | 3369 | |
e1bf0c14 ML |
3370 | /** |
3371 | * batadv_tt_update_orig - update global translation table with new tt | |
3372 | * information received via ogms | |
3373 | * @bat_priv: the bat priv with all the soft interface information | |
3374 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3375 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3376 | * @tt_num_vlan: number of tvlv VLAN entries | |
3377 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3378 | * @tt_num_changes: number of tt changes inside the tt buffer |
3379 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3380 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3381 | */ |
3382 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3383 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3384 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3385 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3386 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3387 | { |
6b5e971a | 3388 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3389 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3390 | bool full_table = true; |
e17931d1 | 3391 | bool has_tt_init; |
a943cac1 | 3392 | |
7ea7b4a1 | 3393 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3394 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3395 | &orig_node->capa_initialized); | |
e17931d1 | 3396 | |
17071578 | 3397 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3398 | * increased by one -> we can apply the attached changes |
3399 | */ | |
e17931d1 | 3400 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3401 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3402 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3403 | * times. | |
9cfc7bd6 SE |
3404 | * In this case send a tt request |
3405 | */ | |
a943cac1 ML |
3406 | if (!tt_num_changes) { |
3407 | full_table = false; | |
3408 | goto request_table; | |
3409 | } | |
3410 | ||
a70a9aa9 AQ |
3411 | spin_lock_bh(&orig_node->tt_lock); |
3412 | ||
a513088d | 3413 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3414 | ttvn, tt_change); |
a943cac1 ML |
3415 | |
3416 | /* Even if we received the precomputed crc with the OGM, we | |
3417 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3418 | * in the global table |
3419 | */ | |
7ea7b4a1 | 3420 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3421 | |
a70a9aa9 AQ |
3422 | spin_unlock_bh(&orig_node->tt_lock); |
3423 | ||
a943cac1 ML |
3424 | /* The ttvn alone is not enough to guarantee consistency |
3425 | * because a single value could represent different states | |
3426 | * (due to the wrap around). Thus a node has to check whether | |
3427 | * the resulting table (after applying the changes) is still | |
3428 | * consistent or not. E.g. a node could disconnect while its | |
3429 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3430 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3431 | * inconsistency |
3432 | */ | |
7ea7b4a1 AQ |
3433 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3434 | tt_num_vlan)) | |
a943cac1 | 3435 | goto request_table; |
a943cac1 ML |
3436 | } else { |
3437 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3438 | * in sync anymore -> request fresh tt data |
3439 | */ | |
e17931d1 | 3440 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3441 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3442 | tt_num_vlan)) { | |
a943cac1 | 3443 | request_table: |
39c75a51 | 3444 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3445 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3446 | orig_node->orig, ttvn, orig_ttvn, | |
3447 | tt_num_changes); | |
a513088d | 3448 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3449 | tt_vlan, tt_num_vlan, |
3450 | full_table); | |
a943cac1 ML |
3451 | return; |
3452 | } | |
3453 | } | |
3454 | } | |
3275e7cc | 3455 | |
c018ad3d AQ |
3456 | /** |
3457 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3458 | * @bat_priv: the bat priv with all the soft interface information | |
3459 | * @addr: the mac address of the client to check | |
3460 | * @vid: VLAN identifier | |
3461 | * | |
3462 | * Returns true if we know that the client has moved from its old originator | |
3463 | * to another one. This entry is still kept for consistency purposes and will be | |
3464 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3465 | */ |
56303d34 | 3466 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 3467 | u8 *addr, unsigned short vid) |
3275e7cc | 3468 | { |
56303d34 | 3469 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3470 | bool ret = false; |
3471 | ||
c018ad3d | 3472 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3473 | if (!tt_global_entry) |
3474 | goto out; | |
3475 | ||
c1d07431 | 3476 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3477 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3478 | out: |
3479 | return ret; | |
3480 | } | |
30cfd02b | 3481 | |
7c1fd91d AQ |
3482 | /** |
3483 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3484 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3485 | * @addr: the mac address of the local client to query |
3486 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3487 | * |
3488 | * Returns true if the local client is known to be roaming (it is not served by | |
3489 | * this node anymore) or not. If yes, the client is still present in the table | |
3490 | * to keep the latter consistent with the node TTVN | |
3491 | */ | |
3492 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 3493 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
3494 | { |
3495 | struct batadv_tt_local_entry *tt_local_entry; | |
3496 | bool ret = false; | |
3497 | ||
c018ad3d | 3498 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3499 | if (!tt_local_entry) |
3500 | goto out; | |
3501 | ||
3502 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3503 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3504 | out: | |
3505 | return ret; | |
7c1fd91d AQ |
3506 | } |
3507 | ||
30cfd02b AQ |
3508 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3509 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3510 | const unsigned char *addr, |
16052789 | 3511 | unsigned short vid) |
30cfd02b AQ |
3512 | { |
3513 | bool ret = false; | |
3514 | ||
16052789 | 3515 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3516 | BATADV_TT_CLIENT_TEMP, |
3517 | atomic_read(&orig_node->last_ttvn))) | |
3518 | goto out; | |
3519 | ||
3520 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3521 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3522 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3523 | ret = true; |
3524 | out: | |
3525 | return ret; | |
3526 | } | |
e1bf0c14 | 3527 | |
a19d3d85 ML |
3528 | /** |
3529 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3530 | * maximum packet size that can be transported through the mesh | |
3531 | * @soft_iface: netdev struct of the mesh interface | |
3532 | * | |
3533 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3534 | * to be removed. | |
3535 | */ | |
3536 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3537 | { | |
3538 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3539 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3540 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3541 | bool reduced = false; | |
3542 | ||
3543 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3544 | ||
3545 | while (true) { | |
3546 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3547 | if (packet_size_max >= table_size) | |
3548 | break; | |
3549 | ||
3550 | batadv_tt_local_purge(bat_priv, timeout); | |
3551 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3552 | ||
3553 | timeout /= 2; | |
3554 | reduced = true; | |
3555 | net_ratelimited_function(batadv_info, soft_iface, | |
3556 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3557 | packet_size_max); | |
3558 | } | |
3559 | ||
3560 | /* commit these changes immediately, to avoid synchronization problem | |
3561 | * with the TTVN | |
3562 | */ | |
3563 | if (reduced) | |
3564 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3565 | ||
3566 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3567 | } | |
3568 | ||
e1bf0c14 ML |
3569 | /** |
3570 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3571 | * @bat_priv: the bat priv with all the soft interface information | |
3572 | * @orig: the orig_node of the ogm | |
3573 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3574 | * @tvlv_value: tvlv buffer containing the gateway data | |
3575 | * @tvlv_value_len: tvlv buffer length | |
3576 | */ | |
3577 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3578 | struct batadv_orig_node *orig, | |
6b5e971a SE |
3579 | u8 flags, void *tvlv_value, |
3580 | u16 tvlv_value_len) | |
e1bf0c14 | 3581 | { |
7ea7b4a1 AQ |
3582 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3583 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3584 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 3585 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
3586 | |
3587 | if (tvlv_value_len < sizeof(*tt_data)) | |
3588 | return; | |
3589 | ||
3590 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3591 | tvlv_value_len -= sizeof(*tt_data); | |
3592 | ||
7ea7b4a1 AQ |
3593 | num_vlan = ntohs(tt_data->num_vlan); |
3594 | ||
3595 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3596 | return; | |
3597 | ||
3598 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3599 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3600 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3601 | ||
298e6e68 | 3602 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3603 | |
7ea7b4a1 AQ |
3604 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3605 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3606 | } |
3607 | ||
335fbe0f ML |
3608 | /** |
3609 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3610 | * container | |
3611 | * @bat_priv: the bat priv with all the soft interface information | |
3612 | * @src: mac address of tt tvlv sender | |
3613 | * @dst: mac address of tt tvlv recipient | |
3614 | * @tvlv_value: tvlv buffer containing the tt data | |
3615 | * @tvlv_value_len: tvlv buffer length | |
3616 | * | |
3617 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3618 | * otherwise. | |
3619 | */ | |
3620 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3621 | u8 *src, u8 *dst, |
335fbe0f | 3622 | void *tvlv_value, |
6b5e971a | 3623 | u16 tvlv_value_len) |
335fbe0f ML |
3624 | { |
3625 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 3626 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3627 | char tt_flag; |
3628 | bool ret; | |
3629 | ||
3630 | if (tvlv_value_len < sizeof(*tt_data)) | |
3631 | return NET_RX_SUCCESS; | |
3632 | ||
3633 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3634 | tvlv_value_len -= sizeof(*tt_data); | |
3635 | ||
7ea7b4a1 AQ |
3636 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3637 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3638 | ||
3639 | if (tvlv_value_len < tt_vlan_len) | |
3640 | return NET_RX_SUCCESS; | |
3641 | ||
3642 | tvlv_value_len -= tt_vlan_len; | |
3643 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3644 | |
3645 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3646 | case BATADV_TT_REQUEST: | |
3647 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3648 | ||
3649 | /* If this node cannot provide a TT response the tt_request is | |
3650 | * forwarded | |
3651 | */ | |
3652 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3653 | if (!ret) { | |
3654 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3655 | tt_flag = 'F'; | |
3656 | else | |
3657 | tt_flag = '.'; | |
3658 | ||
3659 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3660 | "Routing TT_REQUEST to %pM [%c]\n", | |
3661 | dst, tt_flag); | |
3662 | /* tvlv API will re-route the packet */ | |
3663 | return NET_RX_DROP; | |
3664 | } | |
3665 | break; | |
3666 | case BATADV_TT_RESPONSE: | |
3667 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3668 | ||
3669 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3670 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3671 | src, tt_num_entries); |
335fbe0f ML |
3672 | return NET_RX_SUCCESS; |
3673 | } | |
3674 | ||
3675 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3676 | tt_flag = 'F'; | |
3677 | else | |
3678 | tt_flag = '.'; | |
3679 | ||
3680 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3681 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3682 | ||
3683 | /* tvlv API will re-route the packet */ | |
3684 | return NET_RX_DROP; | |
3685 | } | |
3686 | ||
3687 | return NET_RX_SUCCESS; | |
3688 | } | |
3689 | ||
122edaa0 ML |
3690 | /** |
3691 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3692 | * @bat_priv: the bat priv with all the soft interface information | |
3693 | * @src: mac address of tt tvlv sender | |
3694 | * @dst: mac address of tt tvlv recipient | |
3695 | * @tvlv_value: tvlv buffer containing the tt data | |
3696 | * @tvlv_value_len: tvlv buffer length | |
3697 | * | |
3698 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3699 | * otherwise. | |
3700 | */ | |
3701 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3702 | u8 *src, u8 *dst, |
122edaa0 | 3703 | void *tvlv_value, |
6b5e971a | 3704 | u16 tvlv_value_len) |
122edaa0 ML |
3705 | { |
3706 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3707 | struct batadv_orig_node *orig_node = NULL; | |
3708 | ||
3709 | /* If this node is not the intended recipient of the | |
3710 | * roaming advertisement the packet is forwarded | |
3711 | * (the tvlv API will re-route the packet). | |
3712 | */ | |
3713 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3714 | return NET_RX_DROP; | |
3715 | ||
122edaa0 ML |
3716 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3717 | goto out; | |
3718 | ||
3719 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3720 | if (!orig_node) | |
3721 | goto out; | |
3722 | ||
3723 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3724 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3725 | ||
3726 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3727 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3728 | src, roaming_adv->client); | |
3729 | ||
3730 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3731 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3732 | atomic_read(&orig_node->last_ttvn) + 1); |
3733 | ||
3734 | out: | |
3735 | if (orig_node) | |
3736 | batadv_orig_node_free_ref(orig_node); | |
3737 | return NET_RX_SUCCESS; | |
3738 | } | |
3739 | ||
e1bf0c14 ML |
3740 | /** |
3741 | * batadv_tt_init - initialise the translation table internals | |
3742 | * @bat_priv: the bat priv with all the soft interface information | |
3743 | * | |
3744 | * Return 0 on success or negative error number in case of failure. | |
3745 | */ | |
3746 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3747 | { | |
3748 | int ret; | |
3749 | ||
0eb01568 AQ |
3750 | /* synchronized flags must be remote */ |
3751 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3752 | ||
e1bf0c14 ML |
3753 | ret = batadv_tt_local_init(bat_priv); |
3754 | if (ret < 0) | |
3755 | return ret; | |
3756 | ||
3757 | ret = batadv_tt_global_init(bat_priv); | |
3758 | if (ret < 0) | |
3759 | return ret; | |
3760 | ||
3761 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3762 | batadv_tt_tvlv_unicast_handler_v1, |
3763 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3764 | |
122edaa0 ML |
3765 | batadv_tvlv_handler_register(bat_priv, NULL, |
3766 | batadv_roam_tvlv_unicast_handler_v1, | |
3767 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3768 | ||
e1bf0c14 ML |
3769 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3770 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3771 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3772 | ||
3773 | return 1; | |
3774 | } | |
42cb0bef AQ |
3775 | |
3776 | /** | |
3777 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3778 | * @bat_priv: the bat priv with all the soft interface information | |
3779 | * @addr: the mac address of the client | |
3780 | * @vid: the identifier of the VLAN where this client is connected | |
3781 | * | |
3782 | * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false | |
3783 | * otherwise | |
3784 | */ | |
3785 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 3786 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
3787 | { |
3788 | struct batadv_tt_global_entry *tt; | |
3789 | bool ret; | |
3790 | ||
3791 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3792 | if (!tt) | |
3793 | return false; | |
3794 | ||
3795 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3796 | ||
3797 | batadv_tt_global_entry_free_ref(tt); | |
3798 | ||
3799 | return ret; | |
3800 | } |