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0b873931 | 1 | /* Copyright (C) 2007-2013 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 | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
21 | #include "translation-table.h" | |
22 | #include "soft-interface.h" | |
32ae9b22 | 23 | #include "hard-interface.h" |
a73105b8 | 24 | #include "send.h" |
c6c8fea2 SE |
25 | #include "hash.h" |
26 | #include "originator.h" | |
a73105b8 | 27 | #include "routing.h" |
20ff9d59 | 28 | #include "bridge_loop_avoidance.h" |
c6c8fea2 | 29 | |
ced72933 | 30 | #include <linux/crc32c.h> |
a73105b8 | 31 | |
dec05074 AQ |
32 | /* hash class keys */ |
33 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
34 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
35 | ||
56303d34 | 36 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 37 | unsigned short vid, |
56303d34 | 38 | struct batadv_orig_node *orig_node); |
a513088d SE |
39 | static void batadv_tt_purge(struct work_struct *work); |
40 | static void | |
56303d34 | 41 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
42 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
43 | struct batadv_orig_node *orig_node, | |
44 | const unsigned char *addr, | |
c018ad3d AQ |
45 | unsigned short vid, const char *message, |
46 | bool roaming); | |
c6c8fea2 | 47 | |
7aadf889 | 48 | /* returns 1 if they are the same mac addr */ |
a513088d | 49 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 50 | { |
56303d34 | 51 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 52 | hash_entry); |
7aadf889 ML |
53 | |
54 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
55 | } | |
56 | ||
c018ad3d AQ |
57 | /** |
58 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
59 | * @data: pointer to the tt_common_entry object to map | |
60 | * @size: the size of the hash table | |
61 | * | |
62 | * Returns the hash index where the object represented by 'data' should be | |
63 | * stored at. | |
64 | */ | |
65 | static inline uint32_t batadv_choose_tt(const void *data, uint32_t size) | |
66 | { | |
67 | struct batadv_tt_common_entry *tt; | |
68 | uint32_t hash = 0; | |
69 | ||
70 | tt = (struct batadv_tt_common_entry *)data; | |
71 | hash = batadv_hash_bytes(hash, &tt->addr, ETH_ALEN); | |
72 | hash = batadv_hash_bytes(hash, &tt->vid, sizeof(tt->vid)); | |
73 | ||
74 | hash += (hash << 3); | |
75 | hash ^= (hash >> 11); | |
76 | hash += (hash << 15); | |
77 | ||
78 | return hash % size; | |
79 | } | |
80 | ||
81 | /** | |
82 | * batadv_tt_hash_find - look for a client in the given hash table | |
83 | * @hash: the hash table to search | |
84 | * @addr: the mac address of the client to look for | |
85 | * @vid: VLAN identifier | |
86 | * | |
87 | * Returns a pointer to the tt_common struct belonging to the searched client if | |
88 | * found, NULL otherwise. | |
89 | */ | |
56303d34 | 90 | static struct batadv_tt_common_entry * |
c018ad3d AQ |
91 | batadv_tt_hash_find(struct batadv_hashtable *hash, const uint8_t *addr, |
92 | unsigned short vid) | |
7aadf889 | 93 | { |
7aadf889 | 94 | struct hlist_head *head; |
c018ad3d | 95 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
c90681b8 | 96 | uint32_t index; |
7aadf889 ML |
97 | |
98 | if (!hash) | |
99 | return NULL; | |
100 | ||
c018ad3d AQ |
101 | memcpy(to_search.addr, addr, ETH_ALEN); |
102 | to_search.vid = vid; | |
103 | ||
104 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
105 | head = &hash->table[index]; |
106 | ||
107 | rcu_read_lock(); | |
c018ad3d AQ |
108 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
109 | if (!batadv_compare_eth(tt, addr)) | |
110 | continue; | |
111 | ||
112 | if (tt->vid != vid) | |
7aadf889 ML |
113 | continue; |
114 | ||
c018ad3d | 115 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
116 | continue; |
117 | ||
c018ad3d | 118 | tt_tmp = tt; |
7aadf889 ML |
119 | break; |
120 | } | |
121 | rcu_read_unlock(); | |
122 | ||
c018ad3d | 123 | return tt_tmp; |
7aadf889 ML |
124 | } |
125 | ||
c018ad3d AQ |
126 | /** |
127 | * batadv_tt_local_hash_find - search the local table for a given client | |
128 | * @bat_priv: the bat priv with all the soft interface information | |
129 | * @addr: the mac address of the client to look for | |
130 | * @vid: VLAN identifier | |
131 | * | |
132 | * Returns a pointer to the corresponding tt_local_entry struct if the client is | |
133 | * found, NULL otherwise. | |
134 | */ | |
56303d34 | 135 | static struct batadv_tt_local_entry * |
c018ad3d AQ |
136 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
137 | unsigned short vid) | |
7aadf889 | 138 | { |
56303d34 SE |
139 | struct batadv_tt_common_entry *tt_common_entry; |
140 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 141 | |
c018ad3d AQ |
142 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
143 | vid); | |
48100bac AQ |
144 | if (tt_common_entry) |
145 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
146 | struct batadv_tt_local_entry, |
147 | common); | |
48100bac AQ |
148 | return tt_local_entry; |
149 | } | |
7aadf889 | 150 | |
c018ad3d AQ |
151 | /** |
152 | * batadv_tt_global_hash_find - search the global table for a given client | |
153 | * @bat_priv: the bat priv with all the soft interface information | |
154 | * @addr: the mac address of the client to look for | |
155 | * @vid: VLAN identifier | |
156 | * | |
157 | * Returns a pointer to the corresponding tt_global_entry struct if the client | |
158 | * is found, NULL otherwise. | |
159 | */ | |
56303d34 | 160 | static struct batadv_tt_global_entry * |
c018ad3d AQ |
161 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
162 | unsigned short vid) | |
48100bac | 163 | { |
56303d34 SE |
164 | struct batadv_tt_common_entry *tt_common_entry; |
165 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 166 | |
c018ad3d AQ |
167 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
168 | vid); | |
48100bac AQ |
169 | if (tt_common_entry) |
170 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
171 | struct batadv_tt_global_entry, |
172 | common); | |
48100bac | 173 | return tt_global_entry; |
7aadf889 ML |
174 | } |
175 | ||
a513088d | 176 | static void |
56303d34 | 177 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 178 | { |
48100bac AQ |
179 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
180 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
181 | } |
182 | ||
21026059 AQ |
183 | /** |
184 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
185 | * tt_global_entry and possibly free it | |
186 | * @tt_global_entry: the object to free | |
187 | */ | |
a513088d | 188 | static void |
56303d34 | 189 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 190 | { |
db08e6e5 | 191 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 192 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 193 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
194 | } |
195 | } | |
196 | ||
a513088d | 197 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 198 | { |
56303d34 | 199 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 200 | |
56303d34 | 201 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
202 | |
203 | /* We are in an rcu callback here, therefore we cannot use | |
204 | * batadv_orig_node_free_ref() and its call_rcu(): | |
205 | * An rcu_barrier() wouldn't wait for that to finish | |
206 | */ | |
207 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
208 | kfree(orig_entry); |
209 | } | |
210 | ||
a513088d | 211 | static void |
56303d34 | 212 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 213 | { |
d657e621 AQ |
214 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
215 | return; | |
29cb99de AQ |
216 | /* to avoid race conditions, immediately decrease the tt counter */ |
217 | atomic_dec(&orig_entry->orig_node->tt_size); | |
a513088d | 218 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
219 | } |
220 | ||
3abe4adb AQ |
221 | /** |
222 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
223 | * @bat_priv: the bat priv with all the soft interface information | |
224 | * @tt_local_entry: the TT entry involved in the event | |
225 | * @event_flags: flags to store in the event structure | |
226 | */ | |
56303d34 | 227 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb AQ |
228 | struct batadv_tt_local_entry *tt_local_entry, |
229 | uint8_t event_flags) | |
a73105b8 | 230 | { |
56303d34 | 231 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb AQ |
232 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
233 | uint8_t flags = common->flags | event_flags; | |
3b643de5 AQ |
234 | bool event_removed = false; |
235 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
236 | |
237 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
238 | if (!tt_change_node) |
239 | return; | |
240 | ||
ff66c975 | 241 | tt_change_node->change.flags = flags; |
e1bf0c14 | 242 | tt_change_node->change.reserved = 0; |
3abe4adb | 243 | memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN); |
c018ad3d | 244 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 245 | |
acd34afa | 246 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
247 | |
248 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
249 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
250 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 251 | list) { |
3abe4adb | 252 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
253 | continue; |
254 | ||
255 | /* DEL+ADD in the same orig interval have no effect and can be | |
256 | * removed to avoid silly behaviour on the receiver side. The | |
257 | * other way around (ADD+DEL) can happen in case of roaming of | |
258 | * a client still in the NEW state. Roaming of NEW clients is | |
259 | * now possible due to automatically recognition of "temporary" | |
260 | * clients | |
261 | */ | |
acd34afa | 262 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
263 | if (!del_op_requested && del_op_entry) |
264 | goto del; | |
265 | if (del_op_requested && !del_op_entry) | |
266 | goto del; | |
267 | continue; | |
268 | del: | |
269 | list_del(&entry->list); | |
270 | kfree(entry); | |
155e4e12 | 271 | kfree(tt_change_node); |
3b643de5 AQ |
272 | event_removed = true; |
273 | goto unlock; | |
274 | } | |
275 | ||
a73105b8 | 276 | /* track the change in the OGMinterval list */ |
807736f6 | 277 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
278 | |
279 | unlock: | |
807736f6 | 280 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 281 | |
3b643de5 | 282 | if (event_removed) |
807736f6 | 283 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 284 | else |
807736f6 | 285 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
286 | } |
287 | ||
335fbe0f ML |
288 | /** |
289 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
290 | * @changes_num: number of tt changes | |
291 | * | |
292 | * Returns computed length in bytes. | |
293 | */ | |
294 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 295 | { |
335fbe0f | 296 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
297 | } |
298 | ||
298e6e68 AQ |
299 | /** |
300 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
301 | * @tt_len: available space | |
302 | * | |
303 | * Returns the number of entries. | |
304 | */ | |
305 | static uint16_t batadv_tt_entries(uint16_t tt_len) | |
306 | { | |
307 | return tt_len / batadv_tt_len(1); | |
308 | } | |
309 | ||
56303d34 | 310 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 311 | { |
807736f6 | 312 | if (bat_priv->tt.local_hash) |
5346c35e | 313 | return 0; |
c6c8fea2 | 314 | |
807736f6 | 315 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 316 | |
807736f6 | 317 | if (!bat_priv->tt.local_hash) |
5346c35e | 318 | return -ENOMEM; |
c6c8fea2 | 319 | |
dec05074 AQ |
320 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
321 | &batadv_tt_local_hash_lock_class_key); | |
322 | ||
5346c35e | 323 | return 0; |
c6c8fea2 SE |
324 | } |
325 | ||
068ee6e2 AQ |
326 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
327 | struct batadv_tt_global_entry *tt_global, | |
328 | const char *message) | |
329 | { | |
330 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
331 | "Deleting global tt entry %pM (vid: %d): %s\n", |
332 | tt_global->common.addr, | |
333 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
334 | |
335 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 336 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 337 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
338 | } |
339 | ||
c018ad3d AQ |
340 | /** |
341 | * batadv_tt_local_add - add a new client to the local table or update an | |
342 | * existing client | |
343 | * @soft_iface: netdev struct of the mesh interface | |
344 | * @addr: the mac address of the client to add | |
345 | * @vid: VLAN identifier | |
346 | * @ifindex: index of the interface where the client is connected to (useful to | |
347 | * identify wireless clients) | |
348 | */ | |
08c36d3e | 349 | void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
c018ad3d | 350 | unsigned short vid, int ifindex) |
c6c8fea2 | 351 | { |
56303d34 | 352 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf SE |
353 | struct batadv_tt_local_entry *tt_local; |
354 | struct batadv_tt_global_entry *tt_global; | |
db08e6e5 | 355 | struct hlist_head *head; |
56303d34 | 356 | struct batadv_tt_orig_list_entry *orig_entry; |
80b3f58c | 357 | int hash_added; |
068ee6e2 | 358 | bool roamed_back = false; |
c6c8fea2 | 359 | |
c018ad3d AQ |
360 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
361 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 362 | |
47c94655 AQ |
363 | if (tt_local) { |
364 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
365 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
366 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
367 | "Re-adding pending client %pM (vid: %d)\n", |
368 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
369 | /* whatever the reason why the PENDING flag was set, |
370 | * this is a client which was enqueued to be removed in | |
371 | * this orig_interval. Since it popped up again, the | |
372 | * flag can be reset like it was never enqueued | |
373 | */ | |
374 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
375 | goto add_event; | |
376 | } | |
377 | ||
378 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
379 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
380 | "Roaming client %pM (vid: %d) came back to its original location\n", |
381 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
382 | /* the ROAM flag is set because this client roamed away |
383 | * and the node got a roaming_advertisement message. Now | |
384 | * that the client popped up again at its original | |
385 | * location such flag can be unset | |
386 | */ | |
387 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
388 | roamed_back = true; | |
389 | } | |
390 | goto check_roaming; | |
c6c8fea2 SE |
391 | } |
392 | ||
47c94655 AQ |
393 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
394 | if (!tt_local) | |
7683fdc1 | 395 | goto out; |
a73105b8 | 396 | |
39c75a51 | 397 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
398 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
399 | addr, BATADV_PRINT_VID(vid), | |
807736f6 | 400 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 401 | |
47c94655 | 402 | memcpy(tt_local->common.addr, addr, ETH_ALEN); |
8425ec6a AQ |
403 | /* The local entry has to be marked as NEW to avoid to send it in |
404 | * a full table response going out before the next ttvn increment | |
405 | * (consistency check) | |
406 | */ | |
407 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 408 | tt_local->common.vid = vid; |
9563877e | 409 | if (batadv_is_wifi_iface(ifindex)) |
47c94655 AQ |
410 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
411 | atomic_set(&tt_local->common.refcount, 2); | |
412 | tt_local->last_seen = jiffies; | |
413 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 SE |
414 | |
415 | /* the batman interface mac address should never be purged */ | |
1eda58bf | 416 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
47c94655 | 417 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 418 | |
807736f6 | 419 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 420 | batadv_choose_tt, &tt_local->common, |
47c94655 | 421 | &tt_local->common.hash_entry); |
80b3f58c SW |
422 | |
423 | if (unlikely(hash_added != 0)) { | |
424 | /* remove the reference for the hash */ | |
47c94655 | 425 | batadv_tt_local_entry_free_ref(tt_local); |
80b3f58c SW |
426 | goto out; |
427 | } | |
428 | ||
068ee6e2 | 429 | add_event: |
3abe4adb | 430 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 431 | |
068ee6e2 AQ |
432 | check_roaming: |
433 | /* Check whether it is a roaming, but don't do anything if the roaming | |
434 | * process has already been handled | |
435 | */ | |
436 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 437 | /* These node are probably going to update their tt table */ |
47c94655 | 438 | head = &tt_global->orig_list; |
db08e6e5 | 439 | rcu_read_lock(); |
b67bfe0d | 440 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 441 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 442 | tt_global->common.vid, |
a513088d | 443 | orig_entry->orig_node); |
db08e6e5 SW |
444 | } |
445 | rcu_read_unlock(); | |
068ee6e2 AQ |
446 | if (roamed_back) { |
447 | batadv_tt_global_free(bat_priv, tt_global, | |
448 | "Roaming canceled"); | |
449 | tt_global = NULL; | |
450 | } else { | |
451 | /* The global entry has to be marked as ROAMING and | |
452 | * has to be kept for consistency purpose | |
453 | */ | |
454 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
455 | tt_global->roam_at = jiffies; | |
456 | } | |
7683fdc1 | 457 | } |
068ee6e2 | 458 | |
7683fdc1 | 459 | out: |
47c94655 AQ |
460 | if (tt_local) |
461 | batadv_tt_local_entry_free_ref(tt_local); | |
462 | if (tt_global) | |
463 | batadv_tt_global_entry_free_ref(tt_global); | |
c6c8fea2 SE |
464 | } |
465 | ||
e1bf0c14 ML |
466 | /** |
467 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
468 | * after local tt changes have been committed | |
469 | * @bat_priv: the bat priv with all the soft interface information | |
470 | */ | |
471 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 472 | { |
e1bf0c14 ML |
473 | struct batadv_tt_change_node *entry, *safe; |
474 | struct batadv_tvlv_tt_data *tt_data; | |
475 | struct batadv_tvlv_tt_change *tt_change; | |
476 | int tt_diff_len = 0, tt_change_len = 0; | |
477 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; | |
be9aa4c1 | 478 | |
e1bf0c14 | 479 | tt_diff_len += batadv_tt_len(atomic_read(&bat_priv->tt.local_changes)); |
be9aa4c1 ML |
480 | |
481 | /* if we have too many changes for one packet don't send any | |
482 | * and wait for the tt table request which will be fragmented | |
483 | */ | |
e1bf0c14 ML |
484 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
485 | tt_diff_len = 0; | |
be9aa4c1 | 486 | |
e1bf0c14 ML |
487 | tt_data = kzalloc(sizeof(*tt_data) + tt_diff_len, GFP_ATOMIC); |
488 | if (!tt_data) | |
489 | return; | |
be9aa4c1 | 490 | |
e1bf0c14 ML |
491 | tt_data->flags = BATADV_TT_OGM_DIFF; |
492 | tt_data->ttvn = atomic_read(&bat_priv->tt.vn); | |
ced72933 | 493 | tt_data->crc = htonl(bat_priv->tt.local_crc); |
c6c8fea2 | 494 | |
e1bf0c14 ML |
495 | if (tt_diff_len == 0) |
496 | goto container_register; | |
be9aa4c1 | 497 | |
298e6e68 | 498 | tt_diff_entries_num = batadv_tt_entries(tt_diff_len); |
c6c8fea2 | 499 | |
807736f6 SE |
500 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
501 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 502 | |
e1bf0c14 ML |
503 | tt_change = (struct batadv_tvlv_tt_change *)(tt_data + 1); |
504 | ||
807736f6 | 505 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 506 | list) { |
e1bf0c14 ML |
507 | if (tt_diff_entries_count < tt_diff_entries_num) { |
508 | memcpy(tt_change + tt_diff_entries_count, | |
509 | &entry->change, | |
510 | sizeof(struct batadv_tvlv_tt_change)); | |
511 | tt_diff_entries_count++; | |
c6c8fea2 | 512 | } |
a73105b8 AQ |
513 | list_del(&entry->list); |
514 | kfree(entry); | |
c6c8fea2 | 515 | } |
807736f6 | 516 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
517 | |
518 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
519 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
520 | kfree(bat_priv->tt.last_changeset); | |
521 | bat_priv->tt.last_changeset_len = 0; | |
522 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 523 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 524 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 525 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 526 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
527 | * instead of providing the diff |
528 | */ | |
e1bf0c14 | 529 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 530 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
531 | memcpy(bat_priv->tt.last_changeset, |
532 | tt_change, tt_change_len); | |
533 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
534 | } |
535 | } | |
807736f6 | 536 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 537 | |
e1bf0c14 ML |
538 | container_register: |
539 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
540 | sizeof(*tt_data) + tt_change_len); | |
541 | kfree(tt_data); | |
c6c8fea2 SE |
542 | } |
543 | ||
08c36d3e | 544 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
545 | { |
546 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 547 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 548 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 549 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 550 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 551 | struct batadv_hard_iface *primary_if; |
c6c8fea2 | 552 | struct hlist_head *head; |
c90681b8 | 553 | uint32_t i; |
85766a82 AQ |
554 | int last_seen_secs; |
555 | int last_seen_msecs; | |
556 | unsigned long last_seen_jiffies; | |
557 | bool no_purge; | |
558 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 559 | |
30da63a6 ML |
560 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
561 | if (!primary_if) | |
32ae9b22 | 562 | goto out; |
c6c8fea2 | 563 | |
86ceb360 | 564 | seq_printf(seq, |
ced72933 | 565 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u CRC: %#.8x):\n", |
f9d8a537 AQ |
566 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn), |
567 | bat_priv->tt.local_crc); | |
16052789 AQ |
568 | seq_printf(seq, " %-13s %s %-7s %-10s\n", "Client", "VID", |
569 | "Flags", "Last seen"); | |
c6c8fea2 | 570 | |
c6c8fea2 SE |
571 | for (i = 0; i < hash->size; i++) { |
572 | head = &hash->table[i]; | |
573 | ||
7aadf889 | 574 | rcu_read_lock(); |
b67bfe0d | 575 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 576 | head, hash_entry) { |
85766a82 AQ |
577 | tt_local = container_of(tt_common_entry, |
578 | struct batadv_tt_local_entry, | |
579 | common); | |
580 | last_seen_jiffies = jiffies - tt_local->last_seen; | |
581 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
582 | last_seen_secs = last_seen_msecs / 1000; | |
583 | last_seen_msecs = last_seen_msecs % 1000; | |
584 | ||
585 | no_purge = tt_common_entry->flags & np_flag; | |
586 | ||
16052789 | 587 | seq_printf(seq, " * %pM %4i [%c%c%c%c%c] %3u.%03u\n", |
7c64fd98 | 588 | tt_common_entry->addr, |
16052789 | 589 | BATADV_PRINT_VID(tt_common_entry->vid), |
7c64fd98 | 590 | (tt_common_entry->flags & |
acd34afa | 591 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
85766a82 | 592 | no_purge ? 'P' : '.', |
7c64fd98 | 593 | (tt_common_entry->flags & |
acd34afa | 594 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 595 | (tt_common_entry->flags & |
acd34afa | 596 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 597 | (tt_common_entry->flags & |
85766a82 | 598 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
a7966d90 AQ |
599 | no_purge ? 0 : last_seen_secs, |
600 | no_purge ? 0 : last_seen_msecs); | |
c6c8fea2 | 601 | } |
7aadf889 | 602 | rcu_read_unlock(); |
c6c8fea2 | 603 | } |
32ae9b22 ML |
604 | out: |
605 | if (primary_if) | |
e5d89254 | 606 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 607 | return 0; |
c6c8fea2 SE |
608 | } |
609 | ||
56303d34 SE |
610 | static void |
611 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
612 | struct batadv_tt_local_entry *tt_local_entry, | |
613 | uint16_t flags, const char *message) | |
c6c8fea2 | 614 | { |
3abe4adb | 615 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 616 | |
015758d0 AQ |
617 | /* The local client has to be marked as "pending to be removed" but has |
618 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
619 | * response issued before the net ttvn increment (consistency check) |
620 | */ | |
acd34afa | 621 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 622 | |
39c75a51 | 623 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
624 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
625 | tt_local_entry->common.addr, | |
626 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
627 | } |
628 | ||
7f91d06c AQ |
629 | /** |
630 | * batadv_tt_local_remove - logically remove an entry from the local table | |
631 | * @bat_priv: the bat priv with all the soft interface information | |
632 | * @addr: the MAC address of the client to remove | |
c018ad3d | 633 | * @vid: VLAN identifier |
7f91d06c AQ |
634 | * @message: message to append to the log on deletion |
635 | * @roaming: true if the deletion is due to a roaming event | |
636 | * | |
637 | * Returns the flags assigned to the local entry before being deleted | |
638 | */ | |
639 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
c018ad3d AQ |
640 | const uint8_t *addr, unsigned short vid, |
641 | const char *message, bool roaming) | |
c6c8fea2 | 642 | { |
170173bf | 643 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 644 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
c6c8fea2 | 645 | |
c018ad3d | 646 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
647 | if (!tt_local_entry) |
648 | goto out; | |
649 | ||
7f91d06c AQ |
650 | curr_flags = tt_local_entry->common.flags; |
651 | ||
acd34afa | 652 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
653 | /* if this global entry addition is due to a roaming, the node has to |
654 | * mark the local entry as "roamed" in order to correctly reroute | |
655 | * packets later | |
656 | */ | |
7c1fd91d | 657 | if (roaming) { |
acd34afa | 658 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
659 | /* mark the local client as ROAMed */ |
660 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
661 | } | |
42d0b044 | 662 | |
068ee6e2 AQ |
663 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
664 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
665 | message); | |
666 | goto out; | |
667 | } | |
668 | /* if this client has been added right now, it is possible to | |
669 | * immediately purge it | |
670 | */ | |
3abe4adb | 671 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
068ee6e2 AQ |
672 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
673 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 674 | |
7683fdc1 AQ |
675 | out: |
676 | if (tt_local_entry) | |
a513088d | 677 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
678 | |
679 | return curr_flags; | |
c6c8fea2 SE |
680 | } |
681 | ||
56303d34 | 682 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
acd34afa | 683 | struct hlist_head *head) |
c6c8fea2 | 684 | { |
56303d34 SE |
685 | struct batadv_tt_local_entry *tt_local_entry; |
686 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 687 | struct hlist_node *node_tmp; |
acd34afa | 688 | |
b67bfe0d | 689 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
690 | hash_entry) { |
691 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
692 | struct batadv_tt_local_entry, |
693 | common); | |
acd34afa SE |
694 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
695 | continue; | |
696 | ||
697 | /* entry already marked for deletion */ | |
698 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
699 | continue; | |
700 | ||
701 | if (!batadv_has_timed_out(tt_local_entry->last_seen, | |
702 | BATADV_TT_LOCAL_TIMEOUT)) | |
703 | continue; | |
704 | ||
705 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
706 | BATADV_TT_CLIENT_DEL, "timed out"); | |
707 | } | |
708 | } | |
709 | ||
56303d34 | 710 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv) |
acd34afa | 711 | { |
807736f6 | 712 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 713 | struct hlist_head *head; |
7683fdc1 | 714 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 715 | uint32_t i; |
c6c8fea2 | 716 | |
c6c8fea2 SE |
717 | for (i = 0; i < hash->size; i++) { |
718 | head = &hash->table[i]; | |
7683fdc1 | 719 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 720 | |
7683fdc1 | 721 | spin_lock_bh(list_lock); |
acd34afa | 722 | batadv_tt_local_purge_list(bat_priv, head); |
7683fdc1 | 723 | spin_unlock_bh(list_lock); |
c6c8fea2 | 724 | } |
c6c8fea2 SE |
725 | } |
726 | ||
56303d34 | 727 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 728 | { |
5bf74e9c | 729 | struct batadv_hashtable *hash; |
a73105b8 | 730 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
731 | struct batadv_tt_common_entry *tt_common_entry; |
732 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 733 | struct hlist_node *node_tmp; |
7683fdc1 | 734 | struct hlist_head *head; |
c90681b8 | 735 | uint32_t i; |
a73105b8 | 736 | |
807736f6 | 737 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
738 | return; |
739 | ||
807736f6 | 740 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
741 | |
742 | for (i = 0; i < hash->size; i++) { | |
743 | head = &hash->table[i]; | |
744 | list_lock = &hash->list_locks[i]; | |
745 | ||
746 | spin_lock_bh(list_lock); | |
b67bfe0d | 747 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 748 | head, hash_entry) { |
b67bfe0d | 749 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
750 | tt_local = container_of(tt_common_entry, |
751 | struct batadv_tt_local_entry, | |
752 | common); | |
753 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
754 | } |
755 | spin_unlock_bh(list_lock); | |
756 | } | |
757 | ||
1a8eaf07 | 758 | batadv_hash_destroy(hash); |
a73105b8 | 759 | |
807736f6 | 760 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
761 | } |
762 | ||
56303d34 | 763 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 764 | { |
807736f6 | 765 | if (bat_priv->tt.global_hash) |
5346c35e | 766 | return 0; |
c6c8fea2 | 767 | |
807736f6 | 768 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 769 | |
807736f6 | 770 | if (!bat_priv->tt.global_hash) |
5346c35e | 771 | return -ENOMEM; |
c6c8fea2 | 772 | |
dec05074 AQ |
773 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
774 | &batadv_tt_global_hash_lock_class_key); | |
775 | ||
5346c35e | 776 | return 0; |
c6c8fea2 SE |
777 | } |
778 | ||
56303d34 | 779 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 780 | { |
56303d34 | 781 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 782 | |
807736f6 | 783 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 784 | |
807736f6 | 785 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
786 | list) { |
787 | list_del(&entry->list); | |
788 | kfree(entry); | |
789 | } | |
c6c8fea2 | 790 | |
807736f6 SE |
791 | atomic_set(&bat_priv->tt.local_changes, 0); |
792 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 793 | } |
c6c8fea2 | 794 | |
d657e621 AQ |
795 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
796 | * batadv_tt_global_entry list | |
797 | * | |
798 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 799 | */ |
d657e621 AQ |
800 | static struct batadv_tt_orig_list_entry * |
801 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
802 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 803 | { |
d657e621 | 804 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 805 | const struct hlist_head *head; |
db08e6e5 SW |
806 | |
807 | rcu_read_lock(); | |
808 | head = &entry->orig_list; | |
b67bfe0d | 809 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
810 | if (tmp_orig_entry->orig_node != orig_node) |
811 | continue; | |
812 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
813 | continue; | |
814 | ||
815 | orig_entry = tmp_orig_entry; | |
816 | break; | |
db08e6e5 SW |
817 | } |
818 | rcu_read_unlock(); | |
d657e621 AQ |
819 | |
820 | return orig_entry; | |
821 | } | |
822 | ||
823 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
824 | * returns true if found, false otherwise | |
825 | */ | |
826 | static bool | |
827 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
828 | const struct batadv_orig_node *orig_node) | |
829 | { | |
830 | struct batadv_tt_orig_list_entry *orig_entry; | |
831 | bool found = false; | |
832 | ||
833 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
834 | if (orig_entry) { | |
835 | found = true; | |
836 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
837 | } | |
838 | ||
db08e6e5 SW |
839 | return found; |
840 | } | |
841 | ||
a513088d | 842 | static void |
d657e621 | 843 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 844 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 845 | { |
56303d34 | 846 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 847 | |
d657e621 | 848 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
849 | if (orig_entry) { |
850 | /* refresh the ttvn: the current value could be a bogus one that | |
851 | * was added during a "temporary client detection" | |
852 | */ | |
853 | orig_entry->ttvn = ttvn; | |
d657e621 | 854 | goto out; |
30cfd02b | 855 | } |
d657e621 | 856 | |
db08e6e5 SW |
857 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
858 | if (!orig_entry) | |
d657e621 | 859 | goto out; |
db08e6e5 SW |
860 | |
861 | INIT_HLIST_NODE(&orig_entry->list); | |
862 | atomic_inc(&orig_node->refcount); | |
863 | atomic_inc(&orig_node->tt_size); | |
864 | orig_entry->orig_node = orig_node; | |
865 | orig_entry->ttvn = ttvn; | |
d657e621 | 866 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 867 | |
d657e621 | 868 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 869 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
870 | &tt_global->orig_list); |
871 | spin_unlock_bh(&tt_global->list_lock); | |
872 | out: | |
873 | if (orig_entry) | |
874 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
875 | } |
876 | ||
d4ff40f6 AQ |
877 | /** |
878 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
879 | * @bat_priv: the bat priv with all the soft interface information | |
880 | * @orig_node: the originator announcing the client | |
881 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 882 | * @vid: VLAN identifier |
d4ff40f6 AQ |
883 | * @flags: TT flags that have to be set for this non-mesh client |
884 | * @ttvn: the tt version number ever announcing this non-mesh client | |
885 | * | |
886 | * Add a new TT global entry for the given originator. If the entry already | |
887 | * exists add a new reference to the given originator (a global entry can have | |
888 | * references to multiple originators) and adjust the flags attribute to reflect | |
889 | * the function argument. | |
890 | * If a TT local entry exists for this non-mesh client remove it. | |
891 | * | |
892 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
893 | * |
894 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 895 | */ |
1e5d49fc AQ |
896 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
897 | struct batadv_orig_node *orig_node, | |
c018ad3d AQ |
898 | const unsigned char *tt_addr, |
899 | unsigned short vid, uint16_t flags, | |
1e5d49fc | 900 | uint8_t ttvn) |
a73105b8 | 901 | { |
170173bf SE |
902 | struct batadv_tt_global_entry *tt_global_entry; |
903 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 904 | bool ret = false; |
80b3f58c | 905 | int hash_added; |
56303d34 | 906 | struct batadv_tt_common_entry *common; |
7f91d06c | 907 | uint16_t local_flags; |
c6c8fea2 | 908 | |
c018ad3d AQ |
909 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
910 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
911 | |
912 | /* if the node already has a local client for this entry, it has to wait | |
913 | * for a roaming advertisement instead of manually messing up the global | |
914 | * table | |
915 | */ | |
916 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
917 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
918 | goto out; | |
a73105b8 AQ |
919 | |
920 | if (!tt_global_entry) { | |
d4f44692 | 921 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 922 | if (!tt_global_entry) |
7683fdc1 AQ |
923 | goto out; |
924 | ||
c0a55929 SE |
925 | common = &tt_global_entry->common; |
926 | memcpy(common->addr, tt_addr, ETH_ALEN); | |
c018ad3d | 927 | common->vid = vid; |
db08e6e5 | 928 | |
d4f44692 | 929 | common->flags = flags; |
cc47f66e | 930 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
931 | /* node must store current time in case of roaming. This is |
932 | * needed to purge this entry out on timeout (if nobody claims | |
933 | * it) | |
934 | */ | |
935 | if (flags & BATADV_TT_CLIENT_ROAM) | |
936 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 937 | atomic_set(&common->refcount, 2); |
30cfd02b | 938 | common->added_at = jiffies; |
db08e6e5 SW |
939 | |
940 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
941 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 942 | |
807736f6 | 943 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 944 | batadv_compare_tt, |
c018ad3d | 945 | batadv_choose_tt, common, |
a513088d | 946 | &common->hash_entry); |
80b3f58c SW |
947 | |
948 | if (unlikely(hash_added != 0)) { | |
949 | /* remove the reference for the hash */ | |
a513088d | 950 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
951 | goto out_remove; |
952 | } | |
a73105b8 | 953 | } else { |
068ee6e2 | 954 | common = &tt_global_entry->common; |
30cfd02b AQ |
955 | /* If there is already a global entry, we can use this one for |
956 | * our processing. | |
068ee6e2 AQ |
957 | * But if we are trying to add a temporary client then here are |
958 | * two options at this point: | |
959 | * 1) the global client is not a temporary client: the global | |
960 | * client has to be left as it is, temporary information | |
961 | * should never override any already known client state | |
962 | * 2) the global client is a temporary client: purge the | |
963 | * originator list and add the new one orig_entry | |
30cfd02b | 964 | */ |
068ee6e2 AQ |
965 | if (flags & BATADV_TT_CLIENT_TEMP) { |
966 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
967 | goto out; | |
968 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
969 | orig_node)) | |
970 | goto out_remove; | |
971 | batadv_tt_global_del_orig_list(tt_global_entry); | |
972 | goto add_orig_entry; | |
973 | } | |
30cfd02b AQ |
974 | |
975 | /* if the client was temporary added before receiving the first | |
976 | * OGM announcing it, we have to clear the TEMP flag | |
977 | */ | |
068ee6e2 | 978 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 979 | |
e9c00136 AQ |
980 | /* the change can carry possible "attribute" flags like the |
981 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
982 | * client entry | |
983 | */ | |
984 | tt_global_entry->common.flags |= flags; | |
985 | ||
acd34afa SE |
986 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
987 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
988 | * delete + roaming change for this originator. |
989 | * | |
990 | * We should first delete the old originator before adding the | |
991 | * new one. | |
992 | */ | |
068ee6e2 | 993 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 994 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 995 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 996 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
997 | } |
998 | } | |
068ee6e2 | 999 | add_orig_entry: |
30cfd02b | 1000 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1001 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1002 | |
39c75a51 | 1003 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1004 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1005 | common->addr, BATADV_PRINT_VID(common->vid), | |
1006 | orig_node->orig); | |
1e5d49fc | 1007 | ret = true; |
c6c8fea2 | 1008 | |
80b3f58c | 1009 | out_remove: |
7f91d06c | 1010 | |
a73105b8 | 1011 | /* remove address from local hash if present */ |
c018ad3d | 1012 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1013 | "global tt received", |
c1d07431 | 1014 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1015 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1016 | ||
068ee6e2 AQ |
1017 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1018 | /* this is a normal global add. Therefore the client is not in a | |
1019 | * roaming state anymore. | |
1020 | */ | |
1021 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1022 | ||
7683fdc1 AQ |
1023 | out: |
1024 | if (tt_global_entry) | |
a513088d | 1025 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1026 | if (tt_local_entry) |
1027 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1028 | return ret; |
c6c8fea2 SE |
1029 | } |
1030 | ||
981d8900 SE |
1031 | /* batadv_transtable_best_orig - Get best originator list entry from tt entry |
1032 | * @tt_global_entry: global translation table entry to be analyzed | |
1033 | * | |
1034 | * This functon assumes the caller holds rcu_read_lock(). | |
1035 | * Returns best originator list entry or NULL on errors. | |
1036 | */ | |
1037 | static struct batadv_tt_orig_list_entry * | |
1038 | batadv_transtable_best_orig(struct batadv_tt_global_entry *tt_global_entry) | |
1039 | { | |
1040 | struct batadv_neigh_node *router = NULL; | |
1041 | struct hlist_head *head; | |
981d8900 SE |
1042 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
1043 | int best_tq = 0; | |
1044 | ||
1045 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1046 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1047 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
1048 | if (!router) | |
1049 | continue; | |
1050 | ||
1051 | if (router->tq_avg > best_tq) { | |
1052 | best_entry = orig_entry; | |
1053 | best_tq = router->tq_avg; | |
1054 | } | |
1055 | ||
1056 | batadv_neigh_node_free_ref(router); | |
1057 | } | |
1058 | ||
1059 | return best_entry; | |
1060 | } | |
1061 | ||
1062 | /* batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1063 | * for this global entry | |
1064 | * @tt_global_entry: global translation table entry to be printed | |
1065 | * @seq: debugfs table seq_file struct | |
1066 | * | |
1067 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1068 | */ |
a513088d | 1069 | static void |
56303d34 | 1070 | batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, |
a513088d | 1071 | struct seq_file *seq) |
db08e6e5 SW |
1072 | { |
1073 | struct hlist_head *head; | |
981d8900 | 1074 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1075 | struct batadv_tt_common_entry *tt_common_entry; |
db08e6e5 SW |
1076 | uint16_t flags; |
1077 | uint8_t last_ttvn; | |
1078 | ||
1079 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1080 | flags = tt_common_entry->flags; |
1081 | ||
1082 | best_entry = batadv_transtable_best_orig(tt_global_entry); | |
1083 | if (best_entry) { | |
1084 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); | |
f9d8a537 | 1085 | seq_printf(seq, |
16052789 | 1086 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", |
981d8900 | 1087 | '*', tt_global_entry->common.addr, |
16052789 | 1088 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1089 | best_entry->ttvn, best_entry->orig_node->orig, |
f9d8a537 | 1090 | last_ttvn, best_entry->orig_node->tt_crc, |
981d8900 SE |
1091 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1092 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
1093 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
1094 | } | |
db08e6e5 SW |
1095 | |
1096 | head = &tt_global_entry->orig_list; | |
1097 | ||
b67bfe0d | 1098 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1099 | if (best_entry == orig_entry) |
1100 | continue; | |
1101 | ||
db08e6e5 | 1102 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 AQ |
1103 | seq_printf(seq, |
1104 | " %c %pM %4d (%3u) via %pM (%3u) [%c%c%c]\n", | |
981d8900 | 1105 | '+', tt_global_entry->common.addr, |
16052789 | 1106 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 SE |
1107 | orig_entry->ttvn, orig_entry->orig_node->orig, |
1108 | last_ttvn, | |
acd34afa | 1109 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b AQ |
1110 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
1111 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
db08e6e5 SW |
1112 | } |
1113 | } | |
1114 | ||
08c36d3e | 1115 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1116 | { |
1117 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1118 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1119 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1120 | struct batadv_tt_common_entry *tt_common_entry; |
1121 | struct batadv_tt_global_entry *tt_global; | |
1122 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1123 | struct hlist_head *head; |
c90681b8 | 1124 | uint32_t i; |
c6c8fea2 | 1125 | |
30da63a6 ML |
1126 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1127 | if (!primary_if) | |
32ae9b22 | 1128 | goto out; |
c6c8fea2 | 1129 | |
2dafb49d AQ |
1130 | seq_printf(seq, |
1131 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1132 | net_dev->name); |
16052789 AQ |
1133 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1134 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1135 | "CRC", "Flags"); | |
c6c8fea2 | 1136 | |
c6c8fea2 SE |
1137 | for (i = 0; i < hash->size; i++) { |
1138 | head = &hash->table[i]; | |
1139 | ||
7aadf889 | 1140 | rcu_read_lock(); |
b67bfe0d | 1141 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1142 | head, hash_entry) { |
56303d34 SE |
1143 | tt_global = container_of(tt_common_entry, |
1144 | struct batadv_tt_global_entry, | |
1145 | common); | |
1146 | batadv_tt_global_print_entry(tt_global, seq); | |
c6c8fea2 | 1147 | } |
7aadf889 | 1148 | rcu_read_unlock(); |
c6c8fea2 | 1149 | } |
32ae9b22 ML |
1150 | out: |
1151 | if (primary_if) | |
e5d89254 | 1152 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1153 | return 0; |
c6c8fea2 SE |
1154 | } |
1155 | ||
db08e6e5 | 1156 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1157 | static void |
56303d34 | 1158 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1159 | { |
db08e6e5 | 1160 | struct hlist_head *head; |
b67bfe0d | 1161 | struct hlist_node *safe; |
56303d34 | 1162 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1163 | |
db08e6e5 SW |
1164 | spin_lock_bh(&tt_global_entry->list_lock); |
1165 | head = &tt_global_entry->orig_list; | |
b67bfe0d SL |
1166 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
1167 | hlist_del_rcu(&orig_entry->list); | |
a513088d | 1168 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1169 | } |
1170 | spin_unlock_bh(&tt_global_entry->list_lock); | |
db08e6e5 SW |
1171 | } |
1172 | ||
a513088d | 1173 | static void |
56303d34 SE |
1174 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
1175 | struct batadv_tt_global_entry *tt_global_entry, | |
1176 | struct batadv_orig_node *orig_node, | |
a513088d | 1177 | const char *message) |
db08e6e5 SW |
1178 | { |
1179 | struct hlist_head *head; | |
b67bfe0d | 1180 | struct hlist_node *safe; |
56303d34 | 1181 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1182 | unsigned short vid; |
db08e6e5 SW |
1183 | |
1184 | spin_lock_bh(&tt_global_entry->list_lock); | |
1185 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1186 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1187 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1188 | vid = tt_global_entry->common.vid; |
39c75a51 | 1189 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1190 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1191 | orig_node->orig, |
16052789 AQ |
1192 | tt_global_entry->common.addr, |
1193 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1194 | hlist_del_rcu(&orig_entry->list); |
a513088d | 1195 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1196 | } |
1197 | } | |
1198 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1199 | } | |
1200 | ||
db08e6e5 | 1201 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1202 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1203 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1204 | */ |
a513088d | 1205 | static void |
56303d34 SE |
1206 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1207 | struct batadv_tt_global_entry *tt_global_entry, | |
1208 | struct batadv_orig_node *orig_node, | |
1209 | const char *message) | |
db08e6e5 SW |
1210 | { |
1211 | bool last_entry = true; | |
1212 | struct hlist_head *head; | |
56303d34 | 1213 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1214 | |
1215 | /* no local entry exists, case 1: | |
1216 | * Check if this is the last one or if other entries exist. | |
1217 | */ | |
1218 | ||
1219 | rcu_read_lock(); | |
1220 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1221 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1222 | if (orig_entry->orig_node != orig_node) { |
1223 | last_entry = false; | |
1224 | break; | |
1225 | } | |
1226 | } | |
1227 | rcu_read_unlock(); | |
1228 | ||
1229 | if (last_entry) { | |
1230 | /* its the last one, mark for roaming. */ | |
acd34afa | 1231 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1232 | tt_global_entry->roam_at = jiffies; |
1233 | } else | |
1234 | /* there is another entry, we can simply delete this | |
1235 | * one and can still use the other one. | |
1236 | */ | |
a513088d SE |
1237 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1238 | orig_node, message); | |
db08e6e5 SW |
1239 | } |
1240 | ||
c018ad3d AQ |
1241 | /** |
1242 | * batadv_tt_global_del - remove a client from the global table | |
1243 | * @bat_priv: the bat priv with all the soft interface information | |
1244 | * @orig_node: an originator serving this client | |
1245 | * @addr: the mac address of the client | |
1246 | * @vid: VLAN identifier | |
1247 | * @message: a message explaining the reason for deleting the client to print | |
1248 | * for debugging purpose | |
1249 | * @roaming: true if the deletion has been triggered by a roaming event | |
1250 | */ | |
56303d34 SE |
1251 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1252 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1253 | const unsigned char *addr, unsigned short vid, |
a513088d | 1254 | const char *message, bool roaming) |
a73105b8 | 1255 | { |
170173bf | 1256 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1257 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1258 | |
c018ad3d | 1259 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1260 | if (!tt_global_entry) |
7683fdc1 | 1261 | goto out; |
a73105b8 | 1262 | |
db08e6e5 | 1263 | if (!roaming) { |
a513088d SE |
1264 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1265 | orig_node, message); | |
db08e6e5 SW |
1266 | |
1267 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1268 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1269 | message); | |
db08e6e5 SW |
1270 | |
1271 | goto out; | |
1272 | } | |
92f90f56 SE |
1273 | |
1274 | /* if we are deleting a global entry due to a roam | |
1275 | * event, there are two possibilities: | |
db08e6e5 SW |
1276 | * 1) the client roamed from node A to node B => if there |
1277 | * is only one originator left for this client, we mark | |
acd34afa | 1278 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1279 | * wait for node B to claim it. In case of timeout |
1280 | * the entry is purged. | |
db08e6e5 SW |
1281 | * |
1282 | * If there are other originators left, we directly delete | |
1283 | * the originator. | |
92f90f56 | 1284 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1285 | * the global entry, since it is useless now. |
1286 | */ | |
a513088d | 1287 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1288 | tt_global_entry->common.addr, |
1289 | vid); | |
a513088d | 1290 | if (local_entry) { |
db08e6e5 | 1291 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1292 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1293 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1294 | } else |
1295 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1296 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1297 | orig_node, message); | |
92f90f56 | 1298 | |
92f90f56 | 1299 | |
cc47f66e | 1300 | out: |
7683fdc1 | 1301 | if (tt_global_entry) |
a513088d SE |
1302 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1303 | if (local_entry) | |
1304 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1305 | } |
1306 | ||
56303d34 SE |
1307 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1308 | struct batadv_orig_node *orig_node, | |
1309 | const char *message) | |
c6c8fea2 | 1310 | { |
56303d34 SE |
1311 | struct batadv_tt_global_entry *tt_global; |
1312 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1313 | uint32_t i; |
807736f6 | 1314 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1315 | struct hlist_node *safe; |
a73105b8 | 1316 | struct hlist_head *head; |
7683fdc1 | 1317 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1318 | unsigned short vid; |
c6c8fea2 | 1319 | |
6e801494 SW |
1320 | if (!hash) |
1321 | return; | |
1322 | ||
a73105b8 AQ |
1323 | for (i = 0; i < hash->size; i++) { |
1324 | head = &hash->table[i]; | |
7683fdc1 | 1325 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1326 | |
7683fdc1 | 1327 | spin_lock_bh(list_lock); |
b67bfe0d | 1328 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1329 | head, hash_entry) { |
56303d34 SE |
1330 | tt_global = container_of(tt_common_entry, |
1331 | struct batadv_tt_global_entry, | |
1332 | common); | |
db08e6e5 | 1333 | |
56303d34 | 1334 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1335 | orig_node, message); |
db08e6e5 | 1336 | |
56303d34 | 1337 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1338 | vid = tt_global->common.vid; |
39c75a51 | 1339 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1340 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1341 | tt_global->common.addr, | |
1342 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1343 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1344 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1345 | } |
a73105b8 | 1346 | } |
7683fdc1 | 1347 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1348 | } |
17071578 | 1349 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1350 | } |
1351 | ||
30cfd02b AQ |
1352 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1353 | char **msg) | |
cc47f66e | 1354 | { |
30cfd02b AQ |
1355 | bool purge = false; |
1356 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1357 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1358 | |
30cfd02b AQ |
1359 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1360 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1361 | purge = true; | |
1362 | *msg = "Roaming timeout\n"; | |
1363 | } | |
42d0b044 | 1364 | |
30cfd02b AQ |
1365 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1366 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1367 | purge = true; | |
1368 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1369 | } |
30cfd02b AQ |
1370 | |
1371 | return purge; | |
42d0b044 SE |
1372 | } |
1373 | ||
30cfd02b | 1374 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1375 | { |
807736f6 | 1376 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1377 | struct hlist_head *head; |
b67bfe0d | 1378 | struct hlist_node *node_tmp; |
7683fdc1 | 1379 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1380 | uint32_t i; |
30cfd02b AQ |
1381 | char *msg = NULL; |
1382 | struct batadv_tt_common_entry *tt_common; | |
1383 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1384 | |
cc47f66e AQ |
1385 | for (i = 0; i < hash->size; i++) { |
1386 | head = &hash->table[i]; | |
7683fdc1 | 1387 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1388 | |
7683fdc1 | 1389 | spin_lock_bh(list_lock); |
b67bfe0d | 1390 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1391 | hash_entry) { |
1392 | tt_global = container_of(tt_common, | |
1393 | struct batadv_tt_global_entry, | |
1394 | common); | |
1395 | ||
1396 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1397 | continue; | |
1398 | ||
1399 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1400 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1401 | tt_global->common.addr, | |
1402 | BATADV_PRINT_VID(tt_global->common.vid), | |
1403 | msg); | |
30cfd02b | 1404 | |
b67bfe0d | 1405 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1406 | |
1407 | batadv_tt_global_entry_free_ref(tt_global); | |
1408 | } | |
7683fdc1 | 1409 | spin_unlock_bh(list_lock); |
cc47f66e | 1410 | } |
cc47f66e AQ |
1411 | } |
1412 | ||
56303d34 | 1413 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1414 | { |
5bf74e9c | 1415 | struct batadv_hashtable *hash; |
7683fdc1 | 1416 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1417 | struct batadv_tt_common_entry *tt_common_entry; |
1418 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1419 | struct hlist_node *node_tmp; |
7683fdc1 | 1420 | struct hlist_head *head; |
c90681b8 | 1421 | uint32_t i; |
7683fdc1 | 1422 | |
807736f6 | 1423 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1424 | return; |
1425 | ||
807736f6 | 1426 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1427 | |
1428 | for (i = 0; i < hash->size; i++) { | |
1429 | head = &hash->table[i]; | |
1430 | list_lock = &hash->list_locks[i]; | |
1431 | ||
1432 | spin_lock_bh(list_lock); | |
b67bfe0d | 1433 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1434 | head, hash_entry) { |
b67bfe0d | 1435 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1436 | tt_global = container_of(tt_common_entry, |
1437 | struct batadv_tt_global_entry, | |
1438 | common); | |
1439 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1440 | } |
1441 | spin_unlock_bh(list_lock); | |
1442 | } | |
1443 | ||
1a8eaf07 | 1444 | batadv_hash_destroy(hash); |
7683fdc1 | 1445 | |
807736f6 | 1446 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1447 | } |
1448 | ||
56303d34 SE |
1449 | static bool |
1450 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1451 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1452 | { |
1453 | bool ret = false; | |
1454 | ||
acd34afa SE |
1455 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1456 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1457 | ret = true; |
1458 | ||
1459 | return ret; | |
1460 | } | |
1461 | ||
c018ad3d AQ |
1462 | /** |
1463 | * batadv_transtable_search - get the mesh destination for a given client | |
1464 | * @bat_priv: the bat priv with all the soft interface information | |
1465 | * @src: mac address of the source client | |
1466 | * @addr: mac address of the destination client | |
1467 | * @vid: VLAN identifier | |
1468 | * | |
1469 | * Returns a pointer to the originator that was selected as destination in the | |
1470 | * mesh for contacting the client 'addr', NULL otherwise. | |
1471 | * In case of multiple originators serving the same client, the function returns | |
1472 | * the best one (best in terms of metric towards the destination node). | |
1473 | * | |
1474 | * If the two clients are AP isolated the function returns NULL. | |
1475 | */ | |
56303d34 SE |
1476 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1477 | const uint8_t *src, | |
c018ad3d AQ |
1478 | const uint8_t *addr, |
1479 | unsigned short vid) | |
c6c8fea2 | 1480 | { |
56303d34 SE |
1481 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1482 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1483 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1484 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d AQ |
1485 | bool ap_isolation_enabled = false; |
1486 | struct batadv_softif_vlan *vlan; | |
c6c8fea2 | 1487 | |
b8cbd81d AQ |
1488 | /* if the AP isolation is requested on a VLAN, then check for its |
1489 | * setting in the proper VLAN private data structure | |
1490 | */ | |
1491 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
1492 | if (vlan) { | |
1493 | ap_isolation_enabled = atomic_read(&vlan->ap_isolation); | |
1494 | batadv_softif_vlan_free_ref(vlan); | |
1495 | } | |
1496 | ||
1497 | if (src && ap_isolation_enabled) { | |
c018ad3d | 1498 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
1499 | if (!tt_local_entry || |
1500 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1501 | goto out; |
1502 | } | |
7aadf889 | 1503 | |
c018ad3d | 1504 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 1505 | if (!tt_global_entry) |
7b36e8ee | 1506 | goto out; |
7aadf889 | 1507 | |
3d393e47 | 1508 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1509 | * isolation |
1510 | */ | |
a513088d SE |
1511 | if (tt_local_entry && |
1512 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1513 | goto out; |
1514 | ||
db08e6e5 | 1515 | rcu_read_lock(); |
981d8900 | 1516 | best_entry = batadv_transtable_best_orig(tt_global_entry); |
db08e6e5 | 1517 | /* found anything? */ |
981d8900 SE |
1518 | if (best_entry) |
1519 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1520 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1521 | orig_node = NULL; | |
1522 | rcu_read_unlock(); | |
981d8900 | 1523 | |
7b36e8ee | 1524 | out: |
3d393e47 | 1525 | if (tt_global_entry) |
a513088d | 1526 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1527 | if (tt_local_entry) |
a513088d | 1528 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1529 | |
7b36e8ee | 1530 | return orig_node; |
c6c8fea2 | 1531 | } |
a73105b8 | 1532 | |
ced72933 AQ |
1533 | /** |
1534 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
1535 | * to the given orig_node | |
1536 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d AQ |
1537 | * @orig_node: originator for which the CRC should be computed |
1538 | * | |
1539 | * This function computes the checksum for the global table corresponding to a | |
1540 | * specific originator. In particular, the checksum is computed as follows: For | |
1541 | * each client connected to the originator the CRC32C of the MAC address and the | |
1542 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
1543 | * together. | |
1544 | * | |
1545 | * The idea behind is that CRC32C should be used as much as possible in order to | |
1546 | * produce a unique hash of the table, but since the order which is used to feed | |
1547 | * the CRC32C function affects the result and since every node in the network | |
1548 | * probably sorts the clients differently, the hash function cannot be directly | |
1549 | * computed over the entire table. Hence the CRC32C is used only on | |
1550 | * the single client entry, while all the results are then xor'ed together | |
1551 | * because the XOR operation can combine them all while trying to reduce the | |
1552 | * noise as much as possible. | |
1553 | * | |
1554 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
1555 | */ |
1556 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
56303d34 | 1557 | struct batadv_orig_node *orig_node) |
a73105b8 | 1558 | { |
807736f6 | 1559 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1560 | struct batadv_tt_common_entry *tt_common; |
1561 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 1562 | struct hlist_head *head; |
0ffa9e8d | 1563 | uint32_t i, crc_tmp, crc = 0; |
a73105b8 AQ |
1564 | |
1565 | for (i = 0; i < hash->size; i++) { | |
1566 | head = &hash->table[i]; | |
1567 | ||
1568 | rcu_read_lock(); | |
b67bfe0d | 1569 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
1570 | tt_global = container_of(tt_common, |
1571 | struct batadv_tt_global_entry, | |
1572 | common); | |
db08e6e5 SW |
1573 | /* Roaming clients are in the global table for |
1574 | * consistency only. They don't have to be | |
1575 | * taken into account while computing the | |
1576 | * global crc | |
1577 | */ | |
acd34afa | 1578 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 1579 | continue; |
30cfd02b AQ |
1580 | /* Temporary clients have not been announced yet, so |
1581 | * they have to be skipped while computing the global | |
1582 | * crc | |
1583 | */ | |
1584 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
1585 | continue; | |
db08e6e5 SW |
1586 | |
1587 | /* find out if this global entry is announced by this | |
1588 | * originator | |
1589 | */ | |
56303d34 | 1590 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 1591 | orig_node)) |
db08e6e5 SW |
1592 | continue; |
1593 | ||
0ffa9e8d AQ |
1594 | crc_tmp = crc32c(0, &tt_common->vid, |
1595 | sizeof(tt_common->vid)); | |
1596 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); | |
a73105b8 AQ |
1597 | } |
1598 | rcu_read_unlock(); | |
1599 | } | |
1600 | ||
ced72933 | 1601 | return crc; |
a73105b8 AQ |
1602 | } |
1603 | ||
ced72933 AQ |
1604 | /** |
1605 | * batadv_tt_local_crc - calculates the checksum of the local table | |
1606 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d AQ |
1607 | * |
1608 | * For details about the computation, please refer to the documentation for | |
1609 | * batadv_tt_global_crc(). | |
1610 | * | |
1611 | * Returns the checksum of the local table | |
ced72933 AQ |
1612 | */ |
1613 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv) | |
a73105b8 | 1614 | { |
807736f6 | 1615 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1616 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 1617 | struct hlist_head *head; |
0ffa9e8d | 1618 | uint32_t i, crc_tmp, crc = 0; |
a73105b8 AQ |
1619 | |
1620 | for (i = 0; i < hash->size; i++) { | |
1621 | head = &hash->table[i]; | |
1622 | ||
1623 | rcu_read_lock(); | |
b67bfe0d | 1624 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
058d0e26 | 1625 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
1626 | * account while computing the CRC |
1627 | */ | |
acd34afa | 1628 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 1629 | continue; |
ced72933 | 1630 | |
0ffa9e8d AQ |
1631 | crc_tmp = crc32c(0, &tt_common->vid, |
1632 | sizeof(tt_common->vid)); | |
1633 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); | |
a73105b8 | 1634 | } |
a73105b8 AQ |
1635 | rcu_read_unlock(); |
1636 | } | |
1637 | ||
ced72933 | 1638 | return crc; |
a73105b8 AQ |
1639 | } |
1640 | ||
56303d34 | 1641 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 1642 | { |
56303d34 | 1643 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1644 | |
807736f6 | 1645 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1646 | |
807736f6 | 1647 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
1648 | list_del(&node->list); |
1649 | kfree(node); | |
1650 | } | |
1651 | ||
807736f6 | 1652 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1653 | } |
1654 | ||
56303d34 SE |
1655 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
1656 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
1657 | const void *tt_buff, |
1658 | uint16_t tt_buff_len) | |
a73105b8 | 1659 | { |
a73105b8 | 1660 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
1661 | * last OGM (the OGM could carry no changes) |
1662 | */ | |
a73105b8 AQ |
1663 | spin_lock_bh(&orig_node->tt_buff_lock); |
1664 | if (tt_buff_len > 0) { | |
1665 | kfree(orig_node->tt_buff); | |
1666 | orig_node->tt_buff_len = 0; | |
1667 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
1668 | if (orig_node->tt_buff) { | |
1669 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
1670 | orig_node->tt_buff_len = tt_buff_len; | |
1671 | } | |
1672 | } | |
1673 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1674 | } | |
1675 | ||
56303d34 | 1676 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 1677 | { |
56303d34 | 1678 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1679 | |
807736f6 SE |
1680 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1681 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
1682 | if (batadv_has_timed_out(node->issued_at, |
1683 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
1684 | list_del(&node->list); |
1685 | kfree(node); | |
1686 | } | |
1687 | } | |
807736f6 | 1688 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1689 | } |
1690 | ||
1691 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
1692 | * has already been issued for this orig_node, NULL otherwise |
1693 | */ | |
56303d34 SE |
1694 | static struct batadv_tt_req_node * |
1695 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
1696 | struct batadv_orig_node *orig_node) | |
a73105b8 | 1697 | { |
56303d34 | 1698 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 1699 | |
807736f6 SE |
1700 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1701 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
1702 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
1703 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 1704 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
1705 | goto unlock; |
1706 | } | |
1707 | ||
1708 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
1709 | if (!tt_req_node) | |
1710 | goto unlock; | |
1711 | ||
1712 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
1713 | tt_req_node->issued_at = jiffies; | |
1714 | ||
807736f6 | 1715 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 1716 | unlock: |
807736f6 | 1717 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1718 | return tt_req_node; |
1719 | } | |
1720 | ||
335fbe0f ML |
1721 | /** |
1722 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
1723 | * @entry_ptr: to be checked local tt entry | |
1724 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
1725 | * | |
1726 | * Returns 1 if the entry is a valid, 0 otherwise. | |
1727 | */ | |
1728 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 1729 | { |
56303d34 | 1730 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 1731 | |
acd34afa | 1732 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
1733 | return 0; |
1734 | return 1; | |
1735 | } | |
1736 | ||
a513088d SE |
1737 | static int batadv_tt_global_valid(const void *entry_ptr, |
1738 | const void *data_ptr) | |
a73105b8 | 1739 | { |
56303d34 SE |
1740 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
1741 | const struct batadv_tt_global_entry *tt_global_entry; | |
1742 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 1743 | |
30cfd02b AQ |
1744 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
1745 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
1746 | return 0; |
1747 | ||
56303d34 SE |
1748 | tt_global_entry = container_of(tt_common_entry, |
1749 | struct batadv_tt_global_entry, | |
48100bac AQ |
1750 | common); |
1751 | ||
a513088d | 1752 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
1753 | } |
1754 | ||
335fbe0f ML |
1755 | /** |
1756 | * batadv_tt_tvlv_generate - creates tvlv tt data buffer to fill it with the | |
1757 | * tt entries from the specified tt hash | |
1758 | * @bat_priv: the bat priv with all the soft interface information | |
1759 | * @hash: hash table containing the tt entries | |
1760 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
1761 | * @valid_cb: function to filter tt change entries | |
1762 | * @cb_data: data passed to the filter function as argument | |
1763 | * | |
1764 | * Returns pointer to allocated tvlv tt data buffer if operation was | |
1765 | * successful or NULL otherwise. | |
1766 | */ | |
1767 | static struct batadv_tvlv_tt_data * | |
1768 | batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, | |
1769 | struct batadv_hashtable *hash, uint16_t tt_len, | |
1770 | int (*valid_cb)(const void *, const void *), | |
1771 | void *cb_data) | |
a73105b8 | 1772 | { |
56303d34 | 1773 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f ML |
1774 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
1775 | struct batadv_tvlv_tt_change *tt_change; | |
a73105b8 | 1776 | struct hlist_head *head; |
335fbe0f ML |
1777 | uint16_t tt_tot, tt_num_entries = 0; |
1778 | ssize_t tvlv_tt_size = sizeof(struct batadv_tvlv_tt_data); | |
c90681b8 | 1779 | uint32_t i; |
a73105b8 | 1780 | |
335fbe0f ML |
1781 | if (tvlv_tt_size + tt_len > bat_priv->soft_iface->mtu) { |
1782 | tt_len = bat_priv->soft_iface->mtu - tvlv_tt_size; | |
1783 | tt_len -= tt_len % sizeof(struct batadv_tvlv_tt_change); | |
a73105b8 | 1784 | } |
a73105b8 | 1785 | |
298e6e68 | 1786 | tt_tot = batadv_tt_entries(tt_len); |
a73105b8 | 1787 | |
335fbe0f ML |
1788 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len, |
1789 | GFP_ATOMIC); | |
1790 | if (!tvlv_tt_data) | |
1791 | goto out; | |
a73105b8 | 1792 | |
335fbe0f | 1793 | tt_change = (struct batadv_tvlv_tt_change *)(tvlv_tt_data + 1); |
a73105b8 AQ |
1794 | |
1795 | rcu_read_lock(); | |
1796 | for (i = 0; i < hash->size; i++) { | |
1797 | head = &hash->table[i]; | |
1798 | ||
b67bfe0d | 1799 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 1800 | head, hash_entry) { |
335fbe0f | 1801 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
1802 | break; |
1803 | ||
48100bac | 1804 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
1805 | continue; |
1806 | ||
48100bac AQ |
1807 | memcpy(tt_change->addr, tt_common_entry->addr, |
1808 | ETH_ALEN); | |
27b37ebf | 1809 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 1810 | tt_change->vid = htons(tt_common_entry->vid); |
335fbe0f | 1811 | tt_change->reserved = 0; |
a73105b8 | 1812 | |
335fbe0f | 1813 | tt_num_entries++; |
a73105b8 AQ |
1814 | tt_change++; |
1815 | } | |
1816 | } | |
1817 | rcu_read_unlock(); | |
1818 | ||
1819 | out: | |
335fbe0f | 1820 | return tvlv_tt_data; |
a73105b8 AQ |
1821 | } |
1822 | ||
ced72933 AQ |
1823 | /** |
1824 | * batadv_send_tt_request - send a TT Request message to a given node | |
1825 | * @bat_priv: the bat priv with all the soft interface information | |
1826 | * @dst_orig_node: the destination of the message | |
1827 | * @ttvn: the version number that the source of the message is looking for | |
1828 | * @tt_crc: the CRC associated with the version number | |
1829 | * @full_table: ask for the entire translation table if true, while only for the | |
1830 | * last TT diff otherwise | |
1831 | */ | |
56303d34 SE |
1832 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
1833 | struct batadv_orig_node *dst_orig_node, | |
ced72933 | 1834 | uint8_t ttvn, uint32_t tt_crc, |
a513088d | 1835 | bool full_table) |
a73105b8 | 1836 | { |
335fbe0f | 1837 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 SE |
1838 | struct batadv_hard_iface *primary_if; |
1839 | struct batadv_tt_req_node *tt_req_node = NULL; | |
335fbe0f | 1840 | bool ret = false; |
a73105b8 | 1841 | |
e5d89254 | 1842 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1843 | if (!primary_if) |
1844 | goto out; | |
1845 | ||
1846 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
1847 | * reply from the same orig_node yet |
1848 | */ | |
a513088d | 1849 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
1850 | if (!tt_req_node) |
1851 | goto out; | |
1852 | ||
335fbe0f ML |
1853 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data), GFP_ATOMIC); |
1854 | if (!tvlv_tt_data) | |
a73105b8 AQ |
1855 | goto out; |
1856 | ||
335fbe0f ML |
1857 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
1858 | tvlv_tt_data->ttvn = ttvn; | |
ced72933 | 1859 | tvlv_tt_data->crc = htonl(tt_crc); |
a73105b8 AQ |
1860 | |
1861 | if (full_table) | |
335fbe0f | 1862 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1863 | |
bb351ba0 | 1864 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 1865 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 1866 | |
d69909d2 | 1867 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
1868 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
1869 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
1870 | tvlv_tt_data, sizeof(*tvlv_tt_data)); | |
1871 | ret = true; | |
a73105b8 AQ |
1872 | |
1873 | out: | |
a73105b8 | 1874 | if (primary_if) |
e5d89254 | 1875 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 1876 | if (ret && tt_req_node) { |
807736f6 | 1877 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1878 | list_del(&tt_req_node->list); |
807736f6 | 1879 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1880 | kfree(tt_req_node); |
1881 | } | |
335fbe0f | 1882 | kfree(tvlv_tt_data); |
a73105b8 AQ |
1883 | return ret; |
1884 | } | |
1885 | ||
335fbe0f ML |
1886 | /** |
1887 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
1888 | * node's translation table | |
1889 | * @bat_priv: the bat priv with all the soft interface information | |
1890 | * @tt_data: tt data containing the tt request information | |
1891 | * @req_src: mac address of tt request sender | |
1892 | * @req_dst: mac address of tt request recipient | |
1893 | * | |
1894 | * Returns true if tt request reply was sent, false otherwise. | |
1895 | */ | |
1896 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
1897 | struct batadv_tvlv_tt_data *tt_data, | |
1898 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 1899 | { |
170173bf | 1900 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 1901 | struct batadv_orig_node *res_dst_orig_node = NULL; |
335fbe0f ML |
1902 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
1903 | uint8_t orig_ttvn, req_ttvn; | |
1904 | uint16_t tt_len; | |
1905 | bool ret = false, full_table; | |
a73105b8 | 1906 | |
39c75a51 | 1907 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 1908 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f ML |
1909 | req_src, tt_data->ttvn, req_dst, |
1910 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
1911 | |
1912 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 1913 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
1914 | if (!req_dst_orig_node) |
1915 | goto out; | |
1916 | ||
335fbe0f | 1917 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
1918 | if (!res_dst_orig_node) |
1919 | goto out; | |
1920 | ||
a73105b8 | 1921 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 1922 | req_ttvn = tt_data->ttvn; |
a73105b8 | 1923 | |
335fbe0f | 1924 | /* this node doesn't have the requested data */ |
a73105b8 | 1925 | if (orig_ttvn != req_ttvn || |
ced72933 | 1926 | tt_data->crc != htonl(req_dst_orig_node->tt_crc)) |
a73105b8 AQ |
1927 | goto out; |
1928 | ||
015758d0 | 1929 | /* If the full table has been explicitly requested */ |
335fbe0f | 1930 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
1931 | !req_dst_orig_node->tt_buff) |
1932 | full_table = true; | |
1933 | else | |
1934 | full_table = false; | |
1935 | ||
335fbe0f ML |
1936 | /* TT fragmentation hasn't been implemented yet, so send as many |
1937 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 1938 | */ |
a73105b8 AQ |
1939 | if (!full_table) { |
1940 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
1941 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 1942 | |
335fbe0f ML |
1943 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len, |
1944 | GFP_ATOMIC); | |
1945 | if (!tvlv_tt_data) | |
a73105b8 AQ |
1946 | goto unlock; |
1947 | ||
a73105b8 | 1948 | /* Copy the last orig_node's OGM buffer */ |
335fbe0f | 1949 | memcpy(tvlv_tt_data + 1, req_dst_orig_node->tt_buff, |
a73105b8 | 1950 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
1951 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
1952 | } else { | |
96412690 | 1953 | tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size); |
335fbe0f ML |
1954 | tt_len = batadv_tt_len(tt_len); |
1955 | ||
1956 | tvlv_tt_data = batadv_tt_tvlv_generate(bat_priv, | |
1957 | bat_priv->tt.global_hash, | |
1958 | tt_len, | |
1959 | batadv_tt_global_valid, | |
1960 | req_dst_orig_node); | |
1961 | if (!tvlv_tt_data) | |
a73105b8 | 1962 | goto out; |
a73105b8 AQ |
1963 | } |
1964 | ||
335fbe0f ML |
1965 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
1966 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
1967 | |
1968 | if (full_table) | |
335fbe0f | 1969 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1970 | |
39c75a51 | 1971 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
1972 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
1973 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
1974 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 1975 | |
d69909d2 | 1976 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1977 | |
335fbe0f ML |
1978 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
1979 | req_src, BATADV_TVLV_TT, 1, | |
1980 | tvlv_tt_data, sizeof(*tvlv_tt_data) + tt_len); | |
e91ecfc6 | 1981 | |
335fbe0f | 1982 | ret = true; |
a73105b8 AQ |
1983 | goto out; |
1984 | ||
1985 | unlock: | |
1986 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1987 | ||
1988 | out: | |
1989 | if (res_dst_orig_node) | |
7d211efc | 1990 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 1991 | if (req_dst_orig_node) |
7d211efc | 1992 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 1993 | kfree(tvlv_tt_data); |
a73105b8 | 1994 | return ret; |
a73105b8 | 1995 | } |
96412690 | 1996 | |
335fbe0f ML |
1997 | /** |
1998 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
1999 | * translation table | |
2000 | * @bat_priv: the bat priv with all the soft interface information | |
2001 | * @tt_data: tt data containing the tt request information | |
2002 | * @req_src: mac address of tt request sender | |
2003 | * | |
2004 | * Returns true if tt request reply was sent, false otherwise. | |
2005 | */ | |
2006 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2007 | struct batadv_tvlv_tt_data *tt_data, | |
2008 | uint8_t *req_src) | |
a73105b8 | 2009 | { |
335fbe0f | 2010 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
170173bf | 2011 | struct batadv_orig_node *orig_node; |
56303d34 | 2012 | struct batadv_hard_iface *primary_if = NULL; |
335fbe0f | 2013 | uint8_t my_ttvn, req_ttvn; |
a73105b8 | 2014 | bool full_table; |
335fbe0f | 2015 | uint16_t tt_len; |
a73105b8 | 2016 | |
39c75a51 | 2017 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2018 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f ML |
2019 | req_src, tt_data->ttvn, |
2020 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2021 | |
a70a9aa9 | 2022 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2023 | |
807736f6 | 2024 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2025 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2026 | |
335fbe0f | 2027 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2028 | if (!orig_node) |
2029 | goto out; | |
2030 | ||
e5d89254 | 2031 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2032 | if (!primary_if) |
2033 | goto out; | |
2034 | ||
2035 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2036 | * is too big send the whole local translation table |
2037 | */ | |
335fbe0f | 2038 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2039 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2040 | full_table = true; |
2041 | else | |
2042 | full_table = false; | |
2043 | ||
335fbe0f ML |
2044 | /* TT fragmentation hasn't been implemented yet, so send as many |
2045 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2046 | */ |
a73105b8 | 2047 | if (!full_table) { |
807736f6 SE |
2048 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
2049 | tt_len = bat_priv->tt.last_changeset_len; | |
a73105b8 | 2050 | |
335fbe0f ML |
2051 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len, |
2052 | GFP_ATOMIC); | |
2053 | if (!tvlv_tt_data) | |
a73105b8 AQ |
2054 | goto unlock; |
2055 | ||
335fbe0f ML |
2056 | /* Copy the last orig_node's OGM buffer */ |
2057 | memcpy(tvlv_tt_data + 1, bat_priv->tt.last_changeset, | |
807736f6 SE |
2058 | bat_priv->tt.last_changeset_len); |
2059 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2060 | } else { |
807736f6 | 2061 | tt_len = (uint16_t)atomic_read(&bat_priv->tt.local_entry_num); |
335fbe0f ML |
2062 | tt_len = batadv_tt_len(tt_len); |
2063 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); | |
2064 | ||
2065 | tvlv_tt_data = batadv_tt_tvlv_generate(bat_priv, | |
2066 | bat_priv->tt.local_hash, | |
2067 | tt_len, | |
2068 | batadv_tt_local_valid, | |
2069 | NULL); | |
2070 | if (!tvlv_tt_data) | |
a73105b8 | 2071 | goto out; |
a73105b8 AQ |
2072 | } |
2073 | ||
335fbe0f ML |
2074 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2075 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2076 | |
2077 | if (full_table) | |
335fbe0f | 2078 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2079 | |
39c75a51 | 2080 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2081 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2082 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2083 | |
d69909d2 | 2084 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2085 | |
335fbe0f ML |
2086 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2087 | req_src, BATADV_TVLV_TT, 1, | |
2088 | tvlv_tt_data, sizeof(*tvlv_tt_data) + tt_len); | |
2089 | ||
a73105b8 AQ |
2090 | goto out; |
2091 | ||
2092 | unlock: | |
807736f6 | 2093 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2094 | out: |
a70a9aa9 | 2095 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2096 | if (orig_node) |
7d211efc | 2097 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2098 | if (primary_if) |
e5d89254 | 2099 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2100 | kfree(tvlv_tt_data); |
2101 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2102 | return true; |
2103 | } | |
2104 | ||
335fbe0f ML |
2105 | /** |
2106 | * batadv_send_tt_response - send reply to tt request | |
2107 | * @bat_priv: the bat priv with all the soft interface information | |
2108 | * @tt_data: tt data containing the tt request information | |
2109 | * @req_src: mac address of tt request sender | |
2110 | * @req_dst: mac address of tt request recipient | |
2111 | * | |
2112 | * Returns true if tt request reply was sent, false otherwise. | |
2113 | */ | |
2114 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2115 | struct batadv_tvlv_tt_data *tt_data, | |
2116 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2117 | { |
335fbe0f | 2118 | if (batadv_is_my_mac(bat_priv, req_dst)) { |
20ff9d59 | 2119 | /* don't answer backbone gws! */ |
335fbe0f | 2120 | if (batadv_bla_is_backbone_gw_orig(bat_priv, req_src)) |
20ff9d59 SW |
2121 | return true; |
2122 | ||
335fbe0f | 2123 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
20ff9d59 | 2124 | } else { |
335fbe0f ML |
2125 | return batadv_send_other_tt_response(bat_priv, tt_data, |
2126 | req_src, req_dst); | |
20ff9d59 | 2127 | } |
a73105b8 AQ |
2128 | } |
2129 | ||
56303d34 SE |
2130 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2131 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2132 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2133 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2134 | { |
2135 | int i; | |
a513088d | 2136 | int roams; |
a73105b8 AQ |
2137 | |
2138 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2139 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2140 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2141 | batadv_tt_global_del(bat_priv, orig_node, |
2142 | (tt_change + i)->addr, | |
c018ad3d | 2143 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2144 | "tt removed by changes", |
2145 | roams); | |
08c36d3e | 2146 | } else { |
08c36d3e | 2147 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2148 | (tt_change + i)->addr, |
c018ad3d | 2149 | ntohs((tt_change + i)->vid), |
d4f44692 | 2150 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2151 | /* In case of problem while storing a |
2152 | * global_entry, we stop the updating | |
2153 | * procedure without committing the | |
2154 | * ttvn change. This will avoid to send | |
2155 | * corrupted data on tt_request | |
2156 | */ | |
2157 | return; | |
08c36d3e | 2158 | } |
a73105b8 | 2159 | } |
17071578 | 2160 | orig_node->tt_initialised = true; |
a73105b8 AQ |
2161 | } |
2162 | ||
56303d34 | 2163 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
335fbe0f ML |
2164 | struct batadv_tvlv_tt_data *tt_data, |
2165 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2166 | { |
170173bf | 2167 | struct batadv_orig_node *orig_node; |
a73105b8 | 2168 | |
335fbe0f | 2169 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2170 | if (!orig_node) |
2171 | goto out; | |
2172 | ||
2173 | /* Purge the old table first.. */ | |
08c36d3e | 2174 | batadv_tt_global_del_orig(bat_priv, orig_node, "Received full table"); |
a73105b8 | 2175 | |
a513088d | 2176 | _batadv_tt_update_changes(bat_priv, orig_node, |
335fbe0f ML |
2177 | (struct batadv_tvlv_tt_change *)(tt_data + 1), |
2178 | num_entries, tt_data->ttvn); | |
a73105b8 AQ |
2179 | |
2180 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2181 | kfree(orig_node->tt_buff); | |
2182 | orig_node->tt_buff_len = 0; | |
2183 | orig_node->tt_buff = NULL; | |
2184 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2185 | ||
335fbe0f | 2186 | atomic_set(&orig_node->last_ttvn, tt_data->ttvn); |
a73105b8 AQ |
2187 | |
2188 | out: | |
2189 | if (orig_node) | |
7d211efc | 2190 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2191 | } |
2192 | ||
56303d34 SE |
2193 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2194 | struct batadv_orig_node *orig_node, | |
a513088d | 2195 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2196 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2197 | { |
a513088d SE |
2198 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2199 | tt_num_changes, ttvn); | |
a73105b8 | 2200 | |
e8cf234a AQ |
2201 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2202 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2203 | atomic_set(&orig_node->last_ttvn, ttvn); |
2204 | } | |
2205 | ||
c018ad3d AQ |
2206 | /** |
2207 | * batadv_is_my_client - check if a client is served by the local node | |
2208 | * @bat_priv: the bat priv with all the soft interface information | |
2209 | * @addr: the mac adress of the client to check | |
2210 | * @vid: VLAN identifier | |
2211 | * | |
2212 | * Returns true if the client is served by this node, false otherwise. | |
2213 | */ | |
2214 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2215 | unsigned short vid) | |
a73105b8 | 2216 | { |
170173bf | 2217 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2218 | bool ret = false; |
a73105b8 | 2219 | |
c018ad3d | 2220 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2221 | if (!tt_local_entry) |
2222 | goto out; | |
058d0e26 | 2223 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2224 | * consistency purpose) |
2225 | */ | |
7c1fd91d AQ |
2226 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2227 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2228 | goto out; |
7683fdc1 AQ |
2229 | ret = true; |
2230 | out: | |
a73105b8 | 2231 | if (tt_local_entry) |
a513088d | 2232 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2233 | return ret; |
a73105b8 AQ |
2234 | } |
2235 | ||
335fbe0f ML |
2236 | /** |
2237 | * batadv_handle_tt_response - process incoming tt reply | |
2238 | * @bat_priv: the bat priv with all the soft interface information | |
2239 | * @tt_data: tt data containing the tt request information | |
2240 | * @resp_src: mac address of tt reply sender | |
2241 | * @num_entries: number of tt change entries appended to the tt data | |
2242 | */ | |
2243 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2244 | struct batadv_tvlv_tt_data *tt_data, | |
2245 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2246 | { |
56303d34 SE |
2247 | struct batadv_tt_req_node *node, *safe; |
2248 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2249 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2250 | |
39c75a51 | 2251 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2252 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f ML |
2253 | resp_src, tt_data->ttvn, num_entries, |
2254 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2255 | |
20ff9d59 | 2256 | /* we should have never asked a backbone gw */ |
335fbe0f | 2257 | if (batadv_bla_is_backbone_gw_orig(bat_priv, resp_src)) |
20ff9d59 SW |
2258 | goto out; |
2259 | ||
335fbe0f | 2260 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2261 | if (!orig_node) |
2262 | goto out; | |
2263 | ||
a70a9aa9 AQ |
2264 | spin_lock_bh(&orig_node->tt_lock); |
2265 | ||
335fbe0f ML |
2266 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
2267 | batadv_tt_fill_gtable(bat_priv, tt_data, resp_src, num_entries); | |
96412690 | 2268 | } else { |
335fbe0f ML |
2269 | tt_change = (struct batadv_tvlv_tt_change *)(tt_data + 1); |
2270 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, | |
2271 | tt_data->ttvn, tt_change); | |
96412690 | 2272 | } |
a73105b8 | 2273 | |
a70a9aa9 AQ |
2274 | /* Recalculate the CRC for this orig_node and store it */ |
2275 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); | |
2276 | ||
2277 | spin_unlock_bh(&orig_node->tt_lock); | |
2278 | ||
a73105b8 | 2279 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2280 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2281 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2282 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2283 | continue; |
2284 | list_del(&node->list); | |
2285 | kfree(node); | |
2286 | } | |
807736f6 | 2287 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2288 | out: |
2289 | if (orig_node) | |
7d211efc | 2290 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2291 | } |
2292 | ||
56303d34 | 2293 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2294 | { |
56303d34 | 2295 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2296 | |
807736f6 | 2297 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2298 | |
807736f6 | 2299 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2300 | list_del(&node->list); |
2301 | kfree(node); | |
2302 | } | |
2303 | ||
807736f6 | 2304 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2305 | } |
2306 | ||
56303d34 | 2307 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2308 | { |
56303d34 | 2309 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2310 | |
807736f6 SE |
2311 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2312 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2313 | if (!batadv_has_timed_out(node->first_time, |
2314 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2315 | continue; |
2316 | ||
2317 | list_del(&node->list); | |
2318 | kfree(node); | |
2319 | } | |
807736f6 | 2320 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2321 | } |
2322 | ||
2323 | /* This function checks whether the client already reached the | |
2324 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2325 | * will not be sent. | |
2326 | * | |
9cfc7bd6 SE |
2327 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2328 | */ | |
56303d34 | 2329 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2330 | uint8_t *client) |
cc47f66e | 2331 | { |
56303d34 | 2332 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2333 | bool ret = false; |
2334 | ||
807736f6 | 2335 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2336 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2337 | * reply from the same orig_node yet |
2338 | */ | |
807736f6 | 2339 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2340 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2341 | continue; |
2342 | ||
1eda58bf | 2343 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2344 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2345 | continue; |
2346 | ||
3e34819e | 2347 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2348 | /* Sorry, you roamed too many times! */ |
2349 | goto unlock; | |
2350 | ret = true; | |
2351 | break; | |
2352 | } | |
2353 | ||
2354 | if (!ret) { | |
2355 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2356 | if (!tt_roam_node) | |
2357 | goto unlock; | |
2358 | ||
2359 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2360 | atomic_set(&tt_roam_node->counter, |
2361 | BATADV_ROAMING_MAX_COUNT - 1); | |
cc47f66e AQ |
2362 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
2363 | ||
807736f6 | 2364 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2365 | ret = true; |
2366 | } | |
2367 | ||
2368 | unlock: | |
807736f6 | 2369 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2370 | return ret; |
2371 | } | |
2372 | ||
c018ad3d AQ |
2373 | /** |
2374 | * batadv_send_roam_adv - send a roaming advertisement message | |
2375 | * @bat_priv: the bat priv with all the soft interface information | |
2376 | * @client: mac address of the roaming client | |
2377 | * @vid: VLAN identifier | |
2378 | * @orig_node: message destination | |
2379 | * | |
2380 | * Send a ROAMING_ADV message to the node which was previously serving this | |
2381 | * client. This is done to inform the node that from now on all traffic destined | |
2382 | * for this particular roamed client has to be forwarded to the sender of the | |
2383 | * roaming message. | |
2384 | */ | |
56303d34 | 2385 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 2386 | unsigned short vid, |
56303d34 | 2387 | struct batadv_orig_node *orig_node) |
cc47f66e | 2388 | { |
56303d34 | 2389 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
2390 | struct batadv_tvlv_roam_adv tvlv_roam; |
2391 | ||
2392 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2393 | if (!primary_if) | |
2394 | goto out; | |
cc47f66e AQ |
2395 | |
2396 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2397 | * already roamed to us too many times |
2398 | */ | |
a513088d | 2399 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2400 | goto out; |
2401 | ||
39c75a51 | 2402 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2403 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
2404 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 2405 | |
d69909d2 | 2406 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2407 | |
122edaa0 | 2408 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 2409 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
2410 | |
2411 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
2412 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
2413 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
2414 | |
2415 | out: | |
122edaa0 ML |
2416 | if (primary_if) |
2417 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
2418 | } |
2419 | ||
a513088d | 2420 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2421 | { |
56303d34 | 2422 | struct delayed_work *delayed_work; |
807736f6 | 2423 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
2424 | struct batadv_priv *bat_priv; |
2425 | ||
2426 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
2427 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
2428 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 2429 | |
a513088d | 2430 | batadv_tt_local_purge(bat_priv); |
30cfd02b | 2431 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
2432 | batadv_tt_req_purge(bat_priv); |
2433 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2434 | |
72414442 AQ |
2435 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
2436 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 2437 | } |
cc47f66e | 2438 | |
56303d34 | 2439 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 2440 | { |
e1bf0c14 ML |
2441 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
2442 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
2443 | ||
807736f6 | 2444 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 2445 | |
a513088d SE |
2446 | batadv_tt_local_table_free(bat_priv); |
2447 | batadv_tt_global_table_free(bat_priv); | |
2448 | batadv_tt_req_list_free(bat_priv); | |
2449 | batadv_tt_changes_list_free(bat_priv); | |
2450 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 2451 | |
807736f6 | 2452 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 2453 | } |
058d0e26 | 2454 | |
697f2531 | 2455 | /* This function will enable or disable the specified flags for all the entries |
9cfc7bd6 SE |
2456 | * in the given hash table and returns the number of modified entries |
2457 | */ | |
5bf74e9c SE |
2458 | static uint16_t batadv_tt_set_flags(struct batadv_hashtable *hash, |
2459 | uint16_t flags, bool enable) | |
058d0e26 | 2460 | { |
c90681b8 | 2461 | uint32_t i; |
697f2531 | 2462 | uint16_t changed_num = 0; |
058d0e26 | 2463 | struct hlist_head *head; |
56303d34 | 2464 | struct batadv_tt_common_entry *tt_common_entry; |
058d0e26 AQ |
2465 | |
2466 | if (!hash) | |
697f2531 | 2467 | goto out; |
058d0e26 AQ |
2468 | |
2469 | for (i = 0; i < hash->size; i++) { | |
2470 | head = &hash->table[i]; | |
2471 | ||
2472 | rcu_read_lock(); | |
b67bfe0d | 2473 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 2474 | head, hash_entry) { |
697f2531 AQ |
2475 | if (enable) { |
2476 | if ((tt_common_entry->flags & flags) == flags) | |
2477 | continue; | |
2478 | tt_common_entry->flags |= flags; | |
2479 | } else { | |
2480 | if (!(tt_common_entry->flags & flags)) | |
2481 | continue; | |
2482 | tt_common_entry->flags &= ~flags; | |
2483 | } | |
2484 | changed_num++; | |
058d0e26 AQ |
2485 | } |
2486 | rcu_read_unlock(); | |
2487 | } | |
697f2531 AQ |
2488 | out: |
2489 | return changed_num; | |
058d0e26 AQ |
2490 | } |
2491 | ||
acd34afa | 2492 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 2493 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 2494 | { |
807736f6 | 2495 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
2496 | struct batadv_tt_common_entry *tt_common; |
2497 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 2498 | struct hlist_node *node_tmp; |
058d0e26 AQ |
2499 | struct hlist_head *head; |
2500 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 2501 | uint32_t i; |
058d0e26 AQ |
2502 | |
2503 | if (!hash) | |
2504 | return; | |
2505 | ||
2506 | for (i = 0; i < hash->size; i++) { | |
2507 | head = &hash->table[i]; | |
2508 | list_lock = &hash->list_locks[i]; | |
2509 | ||
2510 | spin_lock_bh(list_lock); | |
b67bfe0d | 2511 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
2512 | hash_entry) { |
2513 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
2514 | continue; |
2515 | ||
39c75a51 | 2516 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2517 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
2518 | tt_common->addr, | |
2519 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 2520 | |
807736f6 | 2521 | atomic_dec(&bat_priv->tt.local_entry_num); |
b67bfe0d | 2522 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
2523 | tt_local = container_of(tt_common, |
2524 | struct batadv_tt_local_entry, | |
2525 | common); | |
2526 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
2527 | } |
2528 | spin_unlock_bh(list_lock); | |
2529 | } | |
058d0e26 AQ |
2530 | } |
2531 | ||
e1bf0c14 ML |
2532 | /** |
2533 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
2534 | * have been queued in the time since the last commit | |
2535 | * @bat_priv: the bat priv with all the soft interface information | |
2536 | */ | |
2537 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
058d0e26 | 2538 | { |
be9aa4c1 ML |
2539 | uint16_t changed_num = 0; |
2540 | ||
a70a9aa9 AQ |
2541 | spin_lock_bh(&bat_priv->tt.commit_lock); |
2542 | ||
e1bf0c14 ML |
2543 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
2544 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
2545 | batadv_tt_tvlv_container_update(bat_priv); | |
a70a9aa9 | 2546 | goto out; |
e1bf0c14 | 2547 | } |
be9aa4c1 | 2548 | |
807736f6 | 2549 | changed_num = batadv_tt_set_flags(bat_priv->tt.local_hash, |
acd34afa | 2550 | BATADV_TT_CLIENT_NEW, false); |
be9aa4c1 ML |
2551 | |
2552 | /* all reset entries have to be counted as local entries */ | |
807736f6 | 2553 | atomic_add(changed_num, &bat_priv->tt.local_entry_num); |
a513088d | 2554 | batadv_tt_local_purge_pending_clients(bat_priv); |
807736f6 | 2555 | bat_priv->tt.local_crc = batadv_tt_local_crc(bat_priv); |
058d0e26 AQ |
2556 | |
2557 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 2558 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 2559 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2560 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 2561 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
2562 | |
2563 | /* reset the sending counter */ | |
807736f6 | 2564 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 2565 | batadv_tt_tvlv_container_update(bat_priv); |
a70a9aa9 AQ |
2566 | |
2567 | out: | |
2568 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
058d0e26 | 2569 | } |
59b699cd | 2570 | |
56303d34 | 2571 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 2572 | uint8_t *dst, unsigned short vid) |
59b699cd | 2573 | { |
56303d34 SE |
2574 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2575 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 2576 | struct batadv_softif_vlan *vlan; |
5870adc6 | 2577 | bool ret = false; |
59b699cd | 2578 | |
b8cbd81d AQ |
2579 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
2580 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 2581 | goto out; |
59b699cd | 2582 | |
b8cbd81d | 2583 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
2584 | if (!tt_local_entry) |
2585 | goto out; | |
2586 | ||
b8cbd81d | 2587 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
2588 | if (!tt_global_entry) |
2589 | goto out; | |
2590 | ||
1f129fef | 2591 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
2592 | goto out; |
2593 | ||
5870adc6 | 2594 | ret = true; |
59b699cd AQ |
2595 | |
2596 | out: | |
b8cbd81d AQ |
2597 | if (vlan) |
2598 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 2599 | if (tt_global_entry) |
a513088d | 2600 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 2601 | if (tt_local_entry) |
a513088d | 2602 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
2603 | return ret; |
2604 | } | |
a943cac1 | 2605 | |
e1bf0c14 ML |
2606 | /** |
2607 | * batadv_tt_update_orig - update global translation table with new tt | |
2608 | * information received via ogms | |
2609 | * @bat_priv: the bat priv with all the soft interface information | |
2610 | * @orig: the orig_node of the ogm | |
2611 | * @tt_buff: buffer holding the tt information | |
2612 | * @tt_num_changes: number of tt changes inside the tt buffer | |
2613 | * @ttvn: translation table version number of this changeset | |
ced72933 | 2614 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
2615 | */ |
2616 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
2617 | struct batadv_orig_node *orig_node, | |
2618 | const unsigned char *tt_buff, | |
2619 | uint16_t tt_num_changes, uint8_t ttvn, | |
ced72933 | 2620 | uint32_t tt_crc) |
a943cac1 ML |
2621 | { |
2622 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
2623 | bool full_table = true; | |
335fbe0f | 2624 | struct batadv_tvlv_tt_change *tt_change; |
a943cac1 | 2625 | |
20ff9d59 | 2626 | /* don't care about a backbone gateways updates. */ |
08adf151 | 2627 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) |
20ff9d59 SW |
2628 | return; |
2629 | ||
17071578 | 2630 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
2631 | * increased by one -> we can apply the attached changes |
2632 | */ | |
17071578 AQ |
2633 | if ((!orig_node->tt_initialised && ttvn == 1) || |
2634 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 2635 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
2636 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
2637 | * times. | |
9cfc7bd6 SE |
2638 | * In this case send a tt request |
2639 | */ | |
a943cac1 ML |
2640 | if (!tt_num_changes) { |
2641 | full_table = false; | |
2642 | goto request_table; | |
2643 | } | |
2644 | ||
a70a9aa9 AQ |
2645 | spin_lock_bh(&orig_node->tt_lock); |
2646 | ||
335fbe0f | 2647 | tt_change = (struct batadv_tvlv_tt_change *)tt_buff; |
a513088d | 2648 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 2649 | ttvn, tt_change); |
a943cac1 ML |
2650 | |
2651 | /* Even if we received the precomputed crc with the OGM, we | |
2652 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
2653 | * in the global table |
2654 | */ | |
a513088d | 2655 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
a943cac1 | 2656 | |
a70a9aa9 AQ |
2657 | spin_unlock_bh(&orig_node->tt_lock); |
2658 | ||
a943cac1 ML |
2659 | /* The ttvn alone is not enough to guarantee consistency |
2660 | * because a single value could represent different states | |
2661 | * (due to the wrap around). Thus a node has to check whether | |
2662 | * the resulting table (after applying the changes) is still | |
2663 | * consistent or not. E.g. a node could disconnect while its | |
2664 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
2665 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
2666 | * inconsistency |
2667 | */ | |
a943cac1 ML |
2668 | if (orig_node->tt_crc != tt_crc) |
2669 | goto request_table; | |
a943cac1 ML |
2670 | } else { |
2671 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
2672 | * in sync anymore -> request fresh tt data |
2673 | */ | |
17071578 AQ |
2674 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
2675 | orig_node->tt_crc != tt_crc) { | |
a943cac1 | 2676 | request_table: |
39c75a51 | 2677 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
ced72933 | 2678 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u crc: %#.8x last_crc: %#.8x num_changes: %u)\n", |
1eda58bf SE |
2679 | orig_node->orig, ttvn, orig_ttvn, tt_crc, |
2680 | orig_node->tt_crc, tt_num_changes); | |
a513088d SE |
2681 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
2682 | tt_crc, full_table); | |
a943cac1 ML |
2683 | return; |
2684 | } | |
2685 | } | |
2686 | } | |
3275e7cc | 2687 | |
c018ad3d AQ |
2688 | /** |
2689 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
2690 | * @bat_priv: the bat priv with all the soft interface information | |
2691 | * @addr: the mac address of the client to check | |
2692 | * @vid: VLAN identifier | |
2693 | * | |
2694 | * Returns true if we know that the client has moved from its old originator | |
2695 | * to another one. This entry is still kept for consistency purposes and will be | |
2696 | * deleted later by a DEL or because of timeout | |
3275e7cc | 2697 | */ |
56303d34 | 2698 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 2699 | uint8_t *addr, unsigned short vid) |
3275e7cc | 2700 | { |
56303d34 | 2701 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
2702 | bool ret = false; |
2703 | ||
c018ad3d | 2704 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
2705 | if (!tt_global_entry) |
2706 | goto out; | |
2707 | ||
c1d07431 | 2708 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 2709 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
2710 | out: |
2711 | return ret; | |
2712 | } | |
30cfd02b | 2713 | |
7c1fd91d AQ |
2714 | /** |
2715 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
2716 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
2717 | * @addr: the mac address of the local client to query |
2718 | * @vid: VLAN identifier | |
7c1fd91d AQ |
2719 | * |
2720 | * Returns true if the local client is known to be roaming (it is not served by | |
2721 | * this node anymore) or not. If yes, the client is still present in the table | |
2722 | * to keep the latter consistent with the node TTVN | |
2723 | */ | |
2724 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 2725 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
2726 | { |
2727 | struct batadv_tt_local_entry *tt_local_entry; | |
2728 | bool ret = false; | |
2729 | ||
c018ad3d | 2730 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
2731 | if (!tt_local_entry) |
2732 | goto out; | |
2733 | ||
2734 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
2735 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
2736 | out: | |
2737 | return ret; | |
7c1fd91d AQ |
2738 | } |
2739 | ||
30cfd02b AQ |
2740 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
2741 | struct batadv_orig_node *orig_node, | |
c018ad3d | 2742 | const unsigned char *addr, |
16052789 | 2743 | unsigned short vid) |
30cfd02b AQ |
2744 | { |
2745 | bool ret = false; | |
2746 | ||
1f36aebc AQ |
2747 | /* if the originator is a backbone node (meaning it belongs to the same |
2748 | * LAN of this node) the temporary client must not be added because to | |
2749 | * reach such destination the node must use the LAN instead of the mesh | |
2750 | */ | |
2751 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) | |
2752 | goto out; | |
2753 | ||
16052789 | 2754 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
2755 | BATADV_TT_CLIENT_TEMP, |
2756 | atomic_read(&orig_node->last_ttvn))) | |
2757 | goto out; | |
2758 | ||
2759 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
2760 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
2761 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
2762 | ret = true; |
2763 | out: | |
2764 | return ret; | |
2765 | } | |
e1bf0c14 ML |
2766 | |
2767 | /** | |
2768 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
2769 | * @bat_priv: the bat priv with all the soft interface information | |
2770 | * @orig: the orig_node of the ogm | |
2771 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
2772 | * @tvlv_value: tvlv buffer containing the gateway data | |
2773 | * @tvlv_value_len: tvlv buffer length | |
2774 | */ | |
2775 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
2776 | struct batadv_orig_node *orig, | |
2777 | uint8_t flags, | |
2778 | void *tvlv_value, | |
2779 | uint16_t tvlv_value_len) | |
2780 | { | |
2781 | struct batadv_tvlv_tt_data *tt_data; | |
2782 | uint16_t num_entries; | |
2783 | ||
2784 | if (tvlv_value_len < sizeof(*tt_data)) | |
2785 | return; | |
2786 | ||
2787 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
2788 | tvlv_value_len -= sizeof(*tt_data); | |
2789 | ||
298e6e68 | 2790 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 ML |
2791 | |
2792 | batadv_tt_update_orig(bat_priv, orig, | |
2793 | (unsigned char *)(tt_data + 1), | |
ced72933 | 2794 | num_entries, tt_data->ttvn, ntohl(tt_data->crc)); |
e1bf0c14 ML |
2795 | } |
2796 | ||
335fbe0f ML |
2797 | /** |
2798 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
2799 | * container | |
2800 | * @bat_priv: the bat priv with all the soft interface information | |
2801 | * @src: mac address of tt tvlv sender | |
2802 | * @dst: mac address of tt tvlv recipient | |
2803 | * @tvlv_value: tvlv buffer containing the tt data | |
2804 | * @tvlv_value_len: tvlv buffer length | |
2805 | * | |
2806 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
2807 | * otherwise. | |
2808 | */ | |
2809 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
2810 | uint8_t *src, uint8_t *dst, | |
2811 | void *tvlv_value, | |
2812 | uint16_t tvlv_value_len) | |
2813 | { | |
2814 | struct batadv_tvlv_tt_data *tt_data; | |
2815 | uint16_t num_entries; | |
2816 | char tt_flag; | |
2817 | bool ret; | |
2818 | ||
2819 | if (tvlv_value_len < sizeof(*tt_data)) | |
2820 | return NET_RX_SUCCESS; | |
2821 | ||
2822 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
2823 | tvlv_value_len -= sizeof(*tt_data); | |
2824 | ||
298e6e68 | 2825 | num_entries = batadv_tt_entries(tvlv_value_len); |
335fbe0f ML |
2826 | |
2827 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
2828 | case BATADV_TT_REQUEST: | |
2829 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
2830 | ||
2831 | /* If this node cannot provide a TT response the tt_request is | |
2832 | * forwarded | |
2833 | */ | |
2834 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
2835 | if (!ret) { | |
2836 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
2837 | tt_flag = 'F'; | |
2838 | else | |
2839 | tt_flag = '.'; | |
2840 | ||
2841 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
2842 | "Routing TT_REQUEST to %pM [%c]\n", | |
2843 | dst, tt_flag); | |
2844 | /* tvlv API will re-route the packet */ | |
2845 | return NET_RX_DROP; | |
2846 | } | |
2847 | break; | |
2848 | case BATADV_TT_RESPONSE: | |
2849 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
2850 | ||
2851 | if (batadv_is_my_mac(bat_priv, dst)) { | |
2852 | batadv_handle_tt_response(bat_priv, tt_data, | |
2853 | src, num_entries); | |
2854 | return NET_RX_SUCCESS; | |
2855 | } | |
2856 | ||
2857 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
2858 | tt_flag = 'F'; | |
2859 | else | |
2860 | tt_flag = '.'; | |
2861 | ||
2862 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
2863 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
2864 | ||
2865 | /* tvlv API will re-route the packet */ | |
2866 | return NET_RX_DROP; | |
2867 | } | |
2868 | ||
2869 | return NET_RX_SUCCESS; | |
2870 | } | |
2871 | ||
122edaa0 ML |
2872 | /** |
2873 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
2874 | * @bat_priv: the bat priv with all the soft interface information | |
2875 | * @src: mac address of tt tvlv sender | |
2876 | * @dst: mac address of tt tvlv recipient | |
2877 | * @tvlv_value: tvlv buffer containing the tt data | |
2878 | * @tvlv_value_len: tvlv buffer length | |
2879 | * | |
2880 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
2881 | * otherwise. | |
2882 | */ | |
2883 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
2884 | uint8_t *src, uint8_t *dst, | |
2885 | void *tvlv_value, | |
2886 | uint16_t tvlv_value_len) | |
2887 | { | |
2888 | struct batadv_tvlv_roam_adv *roaming_adv; | |
2889 | struct batadv_orig_node *orig_node = NULL; | |
2890 | ||
2891 | /* If this node is not the intended recipient of the | |
2892 | * roaming advertisement the packet is forwarded | |
2893 | * (the tvlv API will re-route the packet). | |
2894 | */ | |
2895 | if (!batadv_is_my_mac(bat_priv, dst)) | |
2896 | return NET_RX_DROP; | |
2897 | ||
2898 | /* check if it is a backbone gateway. we don't accept | |
2899 | * roaming advertisement from it, as it has the same | |
2900 | * entries as we have. | |
2901 | */ | |
2902 | if (batadv_bla_is_backbone_gw_orig(bat_priv, src)) | |
2903 | goto out; | |
2904 | ||
2905 | if (tvlv_value_len < sizeof(*roaming_adv)) | |
2906 | goto out; | |
2907 | ||
2908 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
2909 | if (!orig_node) | |
2910 | goto out; | |
2911 | ||
2912 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
2913 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
2914 | ||
2915 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
2916 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
2917 | src, roaming_adv->client); | |
2918 | ||
2919 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 2920 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
2921 | atomic_read(&orig_node->last_ttvn) + 1); |
2922 | ||
2923 | out: | |
2924 | if (orig_node) | |
2925 | batadv_orig_node_free_ref(orig_node); | |
2926 | return NET_RX_SUCCESS; | |
2927 | } | |
2928 | ||
e1bf0c14 ML |
2929 | /** |
2930 | * batadv_tt_init - initialise the translation table internals | |
2931 | * @bat_priv: the bat priv with all the soft interface information | |
2932 | * | |
2933 | * Return 0 on success or negative error number in case of failure. | |
2934 | */ | |
2935 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
2936 | { | |
2937 | int ret; | |
2938 | ||
2939 | ret = batadv_tt_local_init(bat_priv); | |
2940 | if (ret < 0) | |
2941 | return ret; | |
2942 | ||
2943 | ret = batadv_tt_global_init(bat_priv); | |
2944 | if (ret < 0) | |
2945 | return ret; | |
2946 | ||
2947 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
2948 | batadv_tt_tvlv_unicast_handler_v1, |
2949 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 2950 | |
122edaa0 ML |
2951 | batadv_tvlv_handler_register(bat_priv, NULL, |
2952 | batadv_roam_tvlv_unicast_handler_v1, | |
2953 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
2954 | ||
e1bf0c14 ML |
2955 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
2956 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
2957 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
2958 | ||
2959 | return 1; | |
2960 | } |