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9f6446c7 | 1 | /* Copyright (C) 2007-2015 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
c6c8fea2 | 18 | #include "translation-table.h" |
1e2c2a4f SE |
19 | #include "main.h" |
20 | ||
21 | #include <linux/atomic.h> | |
ac4eebd4 | 22 | #include <linux/bitops.h> |
1e2c2a4f SE |
23 | #include <linux/bug.h> |
24 | #include <linux/byteorder/generic.h> | |
25 | #include <linux/compiler.h> | |
26 | #include <linux/crc32c.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/jhash.h> | |
32 | #include <linux/jiffies.h> | |
33 | #include <linux/kernel.h> | |
34 | #include <linux/list.h> | |
35 | #include <linux/lockdep.h> | |
36 | #include <linux/netdevice.h> | |
37 | #include <linux/rculist.h> | |
38 | #include <linux/rcupdate.h> | |
39 | #include <linux/seq_file.h> | |
40 | #include <linux/slab.h> | |
41 | #include <linux/spinlock.h> | |
42 | #include <linux/stddef.h> | |
43 | #include <linux/string.h> | |
44 | #include <linux/workqueue.h> | |
45 | #include <net/net_namespace.h> | |
46 | ||
47 | #include "bridge_loop_avoidance.h" | |
32ae9b22 | 48 | #include "hard-interface.h" |
c6c8fea2 | 49 | #include "hash.h" |
c5caf4ef | 50 | #include "multicast.h" |
1e2c2a4f SE |
51 | #include "originator.h" |
52 | #include "packet.h" | |
53 | #include "soft-interface.h" | |
a73105b8 | 54 | |
dec05074 AQ |
55 | /* hash class keys */ |
56 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
57 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
58 | ||
6b5e971a | 59 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 60 | unsigned short vid, |
56303d34 | 61 | struct batadv_orig_node *orig_node); |
a513088d SE |
62 | static void batadv_tt_purge(struct work_struct *work); |
63 | static void | |
56303d34 | 64 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
65 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
66 | struct batadv_orig_node *orig_node, | |
67 | const unsigned char *addr, | |
c018ad3d AQ |
68 | unsigned short vid, const char *message, |
69 | bool roaming); | |
c6c8fea2 | 70 | |
4c718958 | 71 | /* returns 1 if they are the same mac addr and vid */ |
a513088d | 72 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 73 | { |
56303d34 | 74 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 75 | hash_entry); |
4c718958 ML |
76 | const struct batadv_tt_common_entry *tt1 = data1; |
77 | const struct batadv_tt_common_entry *tt2 = data2; | |
7aadf889 | 78 | |
4c718958 | 79 | return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2); |
7aadf889 ML |
80 | } |
81 | ||
c018ad3d AQ |
82 | /** |
83 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
84 | * @data: pointer to the tt_common_entry object to map | |
85 | * @size: the size of the hash table | |
86 | * | |
87 | * Returns the hash index where the object represented by 'data' should be | |
88 | * stored at. | |
89 | */ | |
6b5e971a | 90 | static inline u32 batadv_choose_tt(const void *data, u32 size) |
c018ad3d AQ |
91 | { |
92 | struct batadv_tt_common_entry *tt; | |
6b5e971a | 93 | u32 hash = 0; |
c018ad3d AQ |
94 | |
95 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
96 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
97 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
98 | |
99 | return hash % size; | |
100 | } | |
101 | ||
102 | /** | |
103 | * batadv_tt_hash_find - look for a client in the given hash table | |
104 | * @hash: the hash table to search | |
105 | * @addr: the mac address of the client to look for | |
106 | * @vid: VLAN identifier | |
107 | * | |
108 | * Returns a pointer to the tt_common struct belonging to the searched client if | |
109 | * found, NULL otherwise. | |
110 | */ | |
56303d34 | 111 | static struct batadv_tt_common_entry * |
6b5e971a | 112 | batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr, |
c018ad3d | 113 | unsigned short vid) |
7aadf889 | 114 | { |
7aadf889 | 115 | struct hlist_head *head; |
c018ad3d | 116 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
6b5e971a | 117 | u32 index; |
7aadf889 ML |
118 | |
119 | if (!hash) | |
120 | return NULL; | |
121 | ||
8fdd0153 | 122 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
123 | to_search.vid = vid; |
124 | ||
125 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
126 | head = &hash->table[index]; |
127 | ||
128 | rcu_read_lock(); | |
c018ad3d AQ |
129 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
130 | if (!batadv_compare_eth(tt, addr)) | |
131 | continue; | |
132 | ||
133 | if (tt->vid != vid) | |
7aadf889 ML |
134 | continue; |
135 | ||
c018ad3d | 136 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
137 | continue; |
138 | ||
c018ad3d | 139 | tt_tmp = tt; |
7aadf889 ML |
140 | break; |
141 | } | |
142 | rcu_read_unlock(); | |
143 | ||
c018ad3d | 144 | return tt_tmp; |
7aadf889 ML |
145 | } |
146 | ||
c018ad3d AQ |
147 | /** |
148 | * batadv_tt_local_hash_find - search the local table for a given client | |
149 | * @bat_priv: the bat priv with all the soft interface information | |
150 | * @addr: the mac address of the client to look for | |
151 | * @vid: VLAN identifier | |
152 | * | |
153 | * Returns a pointer to the corresponding tt_local_entry struct if the client is | |
154 | * found, NULL otherwise. | |
155 | */ | |
56303d34 | 156 | static struct batadv_tt_local_entry * |
6b5e971a | 157 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 158 | unsigned short vid) |
7aadf889 | 159 | { |
56303d34 SE |
160 | struct batadv_tt_common_entry *tt_common_entry; |
161 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 162 | |
c018ad3d AQ |
163 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
164 | vid); | |
48100bac AQ |
165 | if (tt_common_entry) |
166 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
167 | struct batadv_tt_local_entry, |
168 | common); | |
48100bac AQ |
169 | return tt_local_entry; |
170 | } | |
7aadf889 | 171 | |
c018ad3d AQ |
172 | /** |
173 | * batadv_tt_global_hash_find - search the global table for a given client | |
174 | * @bat_priv: the bat priv with all the soft interface information | |
175 | * @addr: the mac address of the client to look for | |
176 | * @vid: VLAN identifier | |
177 | * | |
178 | * Returns a pointer to the corresponding tt_global_entry struct if the client | |
179 | * is found, NULL otherwise. | |
180 | */ | |
56303d34 | 181 | static struct batadv_tt_global_entry * |
6b5e971a | 182 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 183 | unsigned short vid) |
48100bac | 184 | { |
56303d34 SE |
185 | struct batadv_tt_common_entry *tt_common_entry; |
186 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 187 | |
c018ad3d AQ |
188 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
189 | vid); | |
48100bac AQ |
190 | if (tt_common_entry) |
191 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
192 | struct batadv_tt_global_entry, |
193 | common); | |
48100bac | 194 | return tt_global_entry; |
7aadf889 ML |
195 | } |
196 | ||
a513088d | 197 | static void |
56303d34 | 198 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 199 | { |
48100bac AQ |
200 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
201 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
202 | } |
203 | ||
21026059 AQ |
204 | /** |
205 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
206 | * tt_global_entry and possibly free it | |
207 | * @tt_global_entry: the object to free | |
208 | */ | |
a513088d | 209 | static void |
56303d34 | 210 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 211 | { |
db08e6e5 | 212 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 213 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 214 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
215 | } |
216 | } | |
217 | ||
1d8ab8d3 LL |
218 | /** |
219 | * batadv_tt_global_hash_count - count the number of orig entries | |
220 | * @hash: hash table containing the tt entries | |
221 | * @addr: the mac address of the client to count entries for | |
222 | * @vid: VLAN identifier | |
223 | * | |
224 | * Return the number of originators advertising the given address/data | |
225 | * (excluding ourself). | |
226 | */ | |
227 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 228 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
229 | { |
230 | struct batadv_tt_global_entry *tt_global_entry; | |
231 | int count; | |
232 | ||
233 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
234 | if (!tt_global_entry) | |
235 | return 0; | |
236 | ||
237 | count = atomic_read(&tt_global_entry->orig_list_count); | |
238 | batadv_tt_global_entry_free_ref(tt_global_entry); | |
239 | ||
240 | return count; | |
241 | } | |
242 | ||
7ea7b4a1 AQ |
243 | /** |
244 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
245 | * by vid | |
246 | * @bat_priv: the bat priv with all the soft interface information | |
247 | * @vid: the VLAN identifier of the sub-table to change | |
248 | * @v: the amount to sum to the local table size | |
249 | */ | |
250 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
251 | unsigned short vid, int v) | |
252 | { | |
253 | struct batadv_softif_vlan *vlan; | |
254 | ||
255 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
256 | if (!vlan) | |
257 | return; | |
258 | ||
259 | atomic_add(v, &vlan->tt.num_entries); | |
260 | ||
261 | batadv_softif_vlan_free_ref(vlan); | |
262 | } | |
263 | ||
264 | /** | |
265 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
266 | * vid | |
267 | * @bat_priv: the bat priv with all the soft interface information | |
268 | * @vid: the VLAN identifier | |
269 | */ | |
270 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
271 | unsigned short vid) | |
272 | { | |
273 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
274 | } | |
275 | ||
276 | /** | |
277 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
278 | * vid | |
279 | * @bat_priv: the bat priv with all the soft interface information | |
280 | * @vid: the VLAN identifier | |
281 | */ | |
282 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
283 | unsigned short vid) | |
284 | { | |
285 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
286 | } | |
287 | ||
288 | /** | |
289 | * batadv_tt_global_size_mod - change the size by v of the local table | |
290 | * identified by vid | |
291 | * @bat_priv: the bat priv with all the soft interface information | |
292 | * @vid: the VLAN identifier | |
293 | * @v: the amount to sum to the global table size | |
294 | */ | |
295 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
296 | unsigned short vid, int v) | |
297 | { | |
298 | struct batadv_orig_node_vlan *vlan; | |
299 | ||
300 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
301 | if (!vlan) | |
302 | return; | |
303 | ||
304 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
305 | spin_lock_bh(&orig_node->vlan_list_lock); | |
a121048a | 306 | hlist_del_init_rcu(&vlan->list); |
7ea7b4a1 AQ |
307 | spin_unlock_bh(&orig_node->vlan_list_lock); |
308 | batadv_orig_node_vlan_free_ref(vlan); | |
309 | } | |
310 | ||
311 | batadv_orig_node_vlan_free_ref(vlan); | |
312 | } | |
313 | ||
314 | /** | |
315 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
316 | * given vid | |
317 | * @orig_node: the originator which global table size has to be decreased | |
318 | * @vid: the vlan identifier | |
319 | */ | |
320 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
321 | unsigned short vid) | |
322 | { | |
323 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
324 | } | |
325 | ||
326 | /** | |
327 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
328 | * given vid | |
329 | * @orig_node: the originator which global table size has to be decreased | |
330 | * @vid: the vlan identifier | |
331 | */ | |
332 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
333 | unsigned short vid) | |
334 | { | |
335 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
336 | } | |
337 | ||
42eff6a6 SE |
338 | /** |
339 | * batadv_tt_orig_list_entry_release - release tt orig entry from lists and | |
340 | * queue for free after rcu grace period | |
341 | * @orig_entry: tt orig entry to be free'd | |
342 | */ | |
343 | static void | |
344 | batadv_tt_orig_list_entry_release(struct batadv_tt_orig_list_entry *orig_entry) | |
345 | { | |
346 | batadv_orig_node_free_ref(orig_entry->orig_node); | |
347 | kfree_rcu(orig_entry, rcu); | |
348 | } | |
349 | ||
a513088d | 350 | static void |
56303d34 | 351 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 352 | { |
d657e621 AQ |
353 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
354 | return; | |
7ea7b4a1 | 355 | |
42eff6a6 | 356 | batadv_tt_orig_list_entry_release(orig_entry); |
7683fdc1 AQ |
357 | } |
358 | ||
3abe4adb AQ |
359 | /** |
360 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
361 | * @bat_priv: the bat priv with all the soft interface information | |
362 | * @tt_local_entry: the TT entry involved in the event | |
363 | * @event_flags: flags to store in the event structure | |
364 | */ | |
56303d34 | 365 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 366 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 367 | u8 event_flags) |
a73105b8 | 368 | { |
56303d34 | 369 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 370 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 371 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
372 | bool event_removed = false; |
373 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
374 | |
375 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
376 | if (!tt_change_node) |
377 | return; | |
378 | ||
ff66c975 | 379 | tt_change_node->change.flags = flags; |
ca663046 AQ |
380 | memset(tt_change_node->change.reserved, 0, |
381 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 382 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 383 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 384 | |
acd34afa | 385 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
386 | |
387 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
388 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
389 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 390 | list) { |
3abe4adb | 391 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
392 | continue; |
393 | ||
394 | /* DEL+ADD in the same orig interval have no effect and can be | |
395 | * removed to avoid silly behaviour on the receiver side. The | |
396 | * other way around (ADD+DEL) can happen in case of roaming of | |
397 | * a client still in the NEW state. Roaming of NEW clients is | |
398 | * now possible due to automatically recognition of "temporary" | |
399 | * clients | |
400 | */ | |
acd34afa | 401 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
402 | if (!del_op_requested && del_op_entry) |
403 | goto del; | |
404 | if (del_op_requested && !del_op_entry) | |
405 | goto del; | |
3c4f7ab6 AQ |
406 | |
407 | /* this is a second add in the same originator interval. It | |
408 | * means that flags have been changed: update them! | |
409 | */ | |
410 | if (!del_op_requested && !del_op_entry) | |
411 | entry->change.flags = flags; | |
412 | ||
3b643de5 AQ |
413 | continue; |
414 | del: | |
415 | list_del(&entry->list); | |
416 | kfree(entry); | |
155e4e12 | 417 | kfree(tt_change_node); |
3b643de5 AQ |
418 | event_removed = true; |
419 | goto unlock; | |
420 | } | |
421 | ||
a73105b8 | 422 | /* track the change in the OGMinterval list */ |
807736f6 | 423 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
424 | |
425 | unlock: | |
807736f6 | 426 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 427 | |
3b643de5 | 428 | if (event_removed) |
807736f6 | 429 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 430 | else |
807736f6 | 431 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
432 | } |
433 | ||
335fbe0f ML |
434 | /** |
435 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
436 | * @changes_num: number of tt changes | |
437 | * | |
438 | * Returns computed length in bytes. | |
439 | */ | |
440 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 441 | { |
335fbe0f | 442 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
443 | } |
444 | ||
298e6e68 AQ |
445 | /** |
446 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
447 | * @tt_len: available space | |
448 | * | |
449 | * Returns the number of entries. | |
450 | */ | |
6b5e971a | 451 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
452 | { |
453 | return tt_len / batadv_tt_len(1); | |
454 | } | |
455 | ||
a19d3d85 ML |
456 | /** |
457 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
458 | * size when transmitted over the air | |
459 | * @bat_priv: the bat priv with all the soft interface information | |
460 | * | |
461 | * Returns local translation table size in bytes. | |
462 | */ | |
463 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
464 | { | |
4f248cff SE |
465 | u16 num_vlan = 0; |
466 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
467 | struct batadv_softif_vlan *vlan; |
468 | int hdr_size; | |
469 | ||
470 | rcu_read_lock(); | |
471 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
472 | num_vlan++; | |
473 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
474 | } | |
475 | rcu_read_unlock(); | |
476 | ||
477 | /* header size of tvlv encapsulated tt response payload */ | |
478 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
479 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
480 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
481 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
482 | ||
483 | return hdr_size + batadv_tt_len(tt_local_entries); | |
484 | } | |
485 | ||
56303d34 | 486 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 487 | { |
807736f6 | 488 | if (bat_priv->tt.local_hash) |
5346c35e | 489 | return 0; |
c6c8fea2 | 490 | |
807736f6 | 491 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 492 | |
807736f6 | 493 | if (!bat_priv->tt.local_hash) |
5346c35e | 494 | return -ENOMEM; |
c6c8fea2 | 495 | |
dec05074 AQ |
496 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
497 | &batadv_tt_local_hash_lock_class_key); | |
498 | ||
5346c35e | 499 | return 0; |
c6c8fea2 SE |
500 | } |
501 | ||
068ee6e2 AQ |
502 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
503 | struct batadv_tt_global_entry *tt_global, | |
504 | const char *message) | |
505 | { | |
506 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
507 | "Deleting global tt entry %pM (vid: %d): %s\n", |
508 | tt_global->common.addr, | |
509 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
510 | |
511 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 512 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 513 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
514 | } |
515 | ||
c018ad3d AQ |
516 | /** |
517 | * batadv_tt_local_add - add a new client to the local table or update an | |
518 | * existing client | |
519 | * @soft_iface: netdev struct of the mesh interface | |
520 | * @addr: the mac address of the client to add | |
521 | * @vid: VLAN identifier | |
522 | * @ifindex: index of the interface where the client is connected to (useful to | |
523 | * identify wireless clients) | |
9464d071 AQ |
524 | * @mark: the value contained in the skb->mark field of the received packet (if |
525 | * any) | |
a19d3d85 ML |
526 | * |
527 | * Returns true if the client was successfully added, false otherwise. | |
c018ad3d | 528 | */ |
6b5e971a SE |
529 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
530 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 531 | { |
56303d34 | 532 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 533 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 534 | struct batadv_tt_global_entry *tt_global = NULL; |
35df3b29 | 535 | struct batadv_softif_vlan *vlan; |
0c69aecc | 536 | struct net_device *in_dev = NULL; |
db08e6e5 | 537 | struct hlist_head *head; |
56303d34 | 538 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 539 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
540 | bool ret = false; |
541 | bool roamed_back = false; | |
6b5e971a SE |
542 | u8 remote_flags; |
543 | u32 match_mark; | |
c6c8fea2 | 544 | |
0c69aecc AQ |
545 | if (ifindex != BATADV_NULL_IFINDEX) |
546 | in_dev = dev_get_by_index(&init_net, ifindex); | |
547 | ||
c018ad3d | 548 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
549 | |
550 | if (!is_multicast_ether_addr(addr)) | |
551 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 552 | |
47c94655 AQ |
553 | if (tt_local) { |
554 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
555 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
556 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
557 | "Re-adding pending client %pM (vid: %d)\n", |
558 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
559 | /* whatever the reason why the PENDING flag was set, |
560 | * this is a client which was enqueued to be removed in | |
561 | * this orig_interval. Since it popped up again, the | |
562 | * flag can be reset like it was never enqueued | |
563 | */ | |
564 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
565 | goto add_event; | |
566 | } | |
567 | ||
568 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
569 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
570 | "Roaming client %pM (vid: %d) came back to its original location\n", |
571 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
572 | /* the ROAM flag is set because this client roamed away |
573 | * and the node got a roaming_advertisement message. Now | |
574 | * that the client popped up again at its original | |
575 | * location such flag can be unset | |
576 | */ | |
577 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
578 | roamed_back = true; | |
579 | } | |
580 | goto check_roaming; | |
c6c8fea2 SE |
581 | } |
582 | ||
a19d3d85 ML |
583 | /* Ignore the client if we cannot send it in a full table response. */ |
584 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
585 | table_size += batadv_tt_len(1); | |
586 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
587 | if (table_size > packet_size_max) { | |
588 | net_ratelimited_function(batadv_info, soft_iface, | |
589 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
590 | table_size, packet_size_max, addr); | |
591 | goto out; | |
592 | } | |
593 | ||
47c94655 AQ |
594 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
595 | if (!tt_local) | |
7683fdc1 | 596 | goto out; |
a73105b8 | 597 | |
35df3b29 AQ |
598 | /* increase the refcounter of the related vlan */ |
599 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc | 600 | if (WARN(!vlan, "adding TT local entry %pM to non-existent VLAN %d", |
fd7dec25 SE |
601 | addr, BATADV_PRINT_VID(vid))) { |
602 | kfree(tt_local); | |
603 | tt_local = NULL; | |
354136bc | 604 | goto out; |
fd7dec25 | 605 | } |
35df3b29 | 606 | |
39c75a51 | 607 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
608 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
609 | addr, BATADV_PRINT_VID(vid), | |
6b5e971a | 610 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 611 | |
8fdd0153 | 612 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
613 | /* The local entry has to be marked as NEW to avoid to send it in |
614 | * a full table response going out before the next ttvn increment | |
615 | * (consistency check) | |
616 | */ | |
617 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 618 | tt_local->common.vid = vid; |
0c69aecc | 619 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
620 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
621 | atomic_set(&tt_local->common.refcount, 2); | |
622 | tt_local->last_seen = jiffies; | |
623 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 624 | |
c5caf4ef LL |
625 | /* the batman interface mac and multicast addresses should never be |
626 | * purged | |
627 | */ | |
628 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
629 | is_multicast_ether_addr(addr)) | |
47c94655 | 630 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 631 | |
807736f6 | 632 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 633 | batadv_choose_tt, &tt_local->common, |
47c94655 | 634 | &tt_local->common.hash_entry); |
80b3f58c SW |
635 | |
636 | if (unlikely(hash_added != 0)) { | |
637 | /* remove the reference for the hash */ | |
47c94655 | 638 | batadv_tt_local_entry_free_ref(tt_local); |
35df3b29 | 639 | batadv_softif_vlan_free_ref(vlan); |
80b3f58c SW |
640 | goto out; |
641 | } | |
642 | ||
068ee6e2 | 643 | add_event: |
3abe4adb | 644 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 645 | |
068ee6e2 AQ |
646 | check_roaming: |
647 | /* Check whether it is a roaming, but don't do anything if the roaming | |
648 | * process has already been handled | |
649 | */ | |
650 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 651 | /* These node are probably going to update their tt table */ |
47c94655 | 652 | head = &tt_global->orig_list; |
db08e6e5 | 653 | rcu_read_lock(); |
b67bfe0d | 654 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 655 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 656 | tt_global->common.vid, |
a513088d | 657 | orig_entry->orig_node); |
db08e6e5 SW |
658 | } |
659 | rcu_read_unlock(); | |
068ee6e2 AQ |
660 | if (roamed_back) { |
661 | batadv_tt_global_free(bat_priv, tt_global, | |
662 | "Roaming canceled"); | |
663 | tt_global = NULL; | |
664 | } else { | |
665 | /* The global entry has to be marked as ROAMING and | |
666 | * has to be kept for consistency purpose | |
667 | */ | |
668 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
669 | tt_global->roam_at = jiffies; | |
670 | } | |
7683fdc1 | 671 | } |
068ee6e2 | 672 | |
3c4f7ab6 AQ |
673 | /* store the current remote flags before altering them. This helps |
674 | * understanding is flags are changing or not | |
675 | */ | |
676 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
677 | ||
678 | if (batadv_is_wifi_netdev(in_dev)) | |
679 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
680 | else | |
681 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 682 | |
9464d071 AQ |
683 | /* check the mark in the skb: if it's equal to the configured |
684 | * isolation_mark, it means the packet is coming from an isolated | |
685 | * non-mesh client | |
686 | */ | |
687 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
688 | if (bat_priv->isolation_mark_mask && | |
689 | match_mark == bat_priv->isolation_mark) | |
690 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
691 | else | |
692 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
693 | ||
3c4f7ab6 AQ |
694 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
695 | * entry so that all the nodes can get the new flags | |
696 | */ | |
697 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
698 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
699 | ||
700 | ret = true; | |
7683fdc1 | 701 | out: |
0c69aecc AQ |
702 | if (in_dev) |
703 | dev_put(in_dev); | |
47c94655 AQ |
704 | if (tt_local) |
705 | batadv_tt_local_entry_free_ref(tt_local); | |
706 | if (tt_global) | |
707 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 708 | return ret; |
c6c8fea2 SE |
709 | } |
710 | ||
7ea7b4a1 AQ |
711 | /** |
712 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
713 | * within a TT Response directed to another node | |
714 | * @orig_node: originator for which the TT data has to be prepared | |
715 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
716 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
717 | * changed can be stored | |
718 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
719 | * function reserves the amount of space needed to send the entire global TT | |
720 | * table. In case of success the value is updated with the real amount of | |
721 | * reserved bytes | |
722 | ||
723 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
724 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
725 | * objects, one per active VLAN served by the originator node. | |
726 | * | |
727 | * Return the size of the allocated buffer or 0 in case of failure. | |
728 | */ | |
6b5e971a | 729 | static u16 |
7ea7b4a1 AQ |
730 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
731 | struct batadv_tvlv_tt_data **tt_data, | |
732 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 733 | s32 *tt_len) |
7ea7b4a1 | 734 | { |
4f248cff SE |
735 | u16 num_vlan = 0; |
736 | u16 num_entries = 0; | |
737 | u16 change_offset; | |
738 | u16 tvlv_len; | |
7ea7b4a1 AQ |
739 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
740 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 741 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
742 | |
743 | rcu_read_lock(); | |
d0fa4f3f | 744 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
745 | num_vlan++; |
746 | num_entries += atomic_read(&vlan->tt.num_entries); | |
747 | } | |
748 | ||
749 | change_offset = sizeof(**tt_data); | |
750 | change_offset += num_vlan * sizeof(*tt_vlan); | |
751 | ||
752 | /* if tt_len is negative, allocate the space needed by the full table */ | |
753 | if (*tt_len < 0) | |
754 | *tt_len = batadv_tt_len(num_entries); | |
755 | ||
756 | tvlv_len = *tt_len; | |
757 | tvlv_len += change_offset; | |
758 | ||
759 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
760 | if (!*tt_data) { | |
761 | *tt_len = 0; | |
762 | goto out; | |
763 | } | |
764 | ||
765 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
766 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
767 | (*tt_data)->num_vlan = htons(num_vlan); | |
768 | ||
769 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
d0fa4f3f | 770 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
771 | tt_vlan->vid = htons(vlan->vid); |
772 | tt_vlan->crc = htonl(vlan->tt.crc); | |
773 | ||
774 | tt_vlan++; | |
775 | } | |
776 | ||
6b5e971a | 777 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
778 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
779 | ||
780 | out: | |
781 | rcu_read_unlock(); | |
782 | return tvlv_len; | |
783 | } | |
784 | ||
785 | /** | |
786 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
787 | * node | |
788 | * @bat_priv: the bat priv with all the soft interface information | |
789 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
790 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
791 | * changes can be stored | |
792 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
793 | * function reserves the amount of space needed to send the entire local TT | |
794 | * table. In case of success the value is updated with the real amount of | |
795 | * reserved bytes | |
796 | * | |
797 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
798 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
799 | * objects, one per active VLAN. | |
800 | * | |
801 | * Return the size of the allocated buffer or 0 in case of failure. | |
802 | */ | |
6b5e971a | 803 | static u16 |
7ea7b4a1 AQ |
804 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
805 | struct batadv_tvlv_tt_data **tt_data, | |
806 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 807 | s32 *tt_len) |
7ea7b4a1 AQ |
808 | { |
809 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
810 | struct batadv_softif_vlan *vlan; | |
4f248cff SE |
811 | u16 num_vlan = 0; |
812 | u16 num_entries = 0; | |
813 | u16 tvlv_len; | |
6b5e971a | 814 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
815 | int change_offset; |
816 | ||
817 | rcu_read_lock(); | |
818 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
819 | num_vlan++; | |
820 | num_entries += atomic_read(&vlan->tt.num_entries); | |
821 | } | |
822 | ||
823 | change_offset = sizeof(**tt_data); | |
824 | change_offset += num_vlan * sizeof(*tt_vlan); | |
825 | ||
826 | /* if tt_len is negative, allocate the space needed by the full table */ | |
827 | if (*tt_len < 0) | |
828 | *tt_len = batadv_tt_len(num_entries); | |
829 | ||
830 | tvlv_len = *tt_len; | |
831 | tvlv_len += change_offset; | |
832 | ||
833 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
834 | if (!*tt_data) { | |
835 | tvlv_len = 0; | |
836 | goto out; | |
837 | } | |
838 | ||
839 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
840 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
841 | (*tt_data)->num_vlan = htons(num_vlan); | |
842 | ||
843 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
844 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
845 | tt_vlan->vid = htons(vlan->vid); | |
846 | tt_vlan->crc = htonl(vlan->tt.crc); | |
847 | ||
848 | tt_vlan++; | |
849 | } | |
850 | ||
6b5e971a | 851 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
852 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
853 | ||
854 | out: | |
855 | rcu_read_unlock(); | |
856 | return tvlv_len; | |
857 | } | |
858 | ||
e1bf0c14 ML |
859 | /** |
860 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
861 | * after local tt changes have been committed | |
862 | * @bat_priv: the bat priv with all the soft interface information | |
863 | */ | |
864 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 865 | { |
e1bf0c14 ML |
866 | struct batadv_tt_change_node *entry, *safe; |
867 | struct batadv_tvlv_tt_data *tt_data; | |
868 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 869 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
870 | int tt_diff_entries_num = 0; |
871 | int tt_diff_entries_count = 0; | |
6b5e971a | 872 | u16 tvlv_len; |
be9aa4c1 | 873 | |
7ea7b4a1 AQ |
874 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
875 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
876 | |
877 | /* if we have too many changes for one packet don't send any | |
878 | * and wait for the tt table request which will be fragmented | |
879 | */ | |
e1bf0c14 ML |
880 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
881 | tt_diff_len = 0; | |
be9aa4c1 | 882 | |
7ea7b4a1 AQ |
883 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
884 | &tt_change, &tt_diff_len); | |
885 | if (!tvlv_len) | |
e1bf0c14 | 886 | return; |
be9aa4c1 | 887 | |
e1bf0c14 | 888 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 889 | |
e1bf0c14 ML |
890 | if (tt_diff_len == 0) |
891 | goto container_register; | |
be9aa4c1 | 892 | |
807736f6 SE |
893 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
894 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 895 | |
807736f6 | 896 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 897 | list) { |
e1bf0c14 ML |
898 | if (tt_diff_entries_count < tt_diff_entries_num) { |
899 | memcpy(tt_change + tt_diff_entries_count, | |
900 | &entry->change, | |
901 | sizeof(struct batadv_tvlv_tt_change)); | |
902 | tt_diff_entries_count++; | |
c6c8fea2 | 903 | } |
a73105b8 AQ |
904 | list_del(&entry->list); |
905 | kfree(entry); | |
c6c8fea2 | 906 | } |
807736f6 | 907 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
908 | |
909 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
910 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
911 | kfree(bat_priv->tt.last_changeset); | |
912 | bat_priv->tt.last_changeset_len = 0; | |
913 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 914 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 915 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 916 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 917 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
918 | * instead of providing the diff |
919 | */ | |
e1bf0c14 | 920 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 921 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
922 | memcpy(bat_priv->tt.last_changeset, |
923 | tt_change, tt_change_len); | |
924 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
925 | } |
926 | } | |
807736f6 | 927 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 928 | |
e1bf0c14 ML |
929 | container_register: |
930 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 931 | tvlv_len); |
e1bf0c14 | 932 | kfree(tt_data); |
c6c8fea2 SE |
933 | } |
934 | ||
08c36d3e | 935 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
936 | { |
937 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 938 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 939 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 940 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 941 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 942 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 943 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 944 | struct hlist_head *head; |
7ea7b4a1 | 945 | unsigned short vid; |
6b5e971a | 946 | u32 i; |
85766a82 AQ |
947 | int last_seen_secs; |
948 | int last_seen_msecs; | |
949 | unsigned long last_seen_jiffies; | |
950 | bool no_purge; | |
6b5e971a | 951 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 952 | |
30da63a6 ML |
953 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
954 | if (!primary_if) | |
32ae9b22 | 955 | goto out; |
c6c8fea2 | 956 | |
86ceb360 | 957 | seq_printf(seq, |
7ea7b4a1 | 958 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 959 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
dd24ddb2 | 960 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 961 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 962 | |
c6c8fea2 SE |
963 | for (i = 0; i < hash->size; i++) { |
964 | head = &hash->table[i]; | |
965 | ||
7aadf889 | 966 | rcu_read_lock(); |
b67bfe0d | 967 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 968 | head, hash_entry) { |
85766a82 AQ |
969 | tt_local = container_of(tt_common_entry, |
970 | struct batadv_tt_local_entry, | |
971 | common); | |
7ea7b4a1 | 972 | vid = tt_common_entry->vid; |
85766a82 AQ |
973 | last_seen_jiffies = jiffies - tt_local->last_seen; |
974 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
975 | last_seen_secs = last_seen_msecs / 1000; | |
976 | last_seen_msecs = last_seen_msecs % 1000; | |
977 | ||
978 | no_purge = tt_common_entry->flags & np_flag; | |
979 | ||
7ea7b4a1 AQ |
980 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
981 | if (!vlan) { | |
982 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
983 | BATADV_PRINT_VID(vid)); | |
984 | continue; | |
985 | } | |
986 | ||
987 | seq_printf(seq, | |
dd24ddb2 | 988 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 989 | tt_common_entry->addr, |
16052789 | 990 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
991 | ((tt_common_entry->flags & |
992 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 993 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
994 | ((tt_common_entry->flags & |
995 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
996 | ((tt_common_entry->flags & | |
997 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
998 | ((tt_common_entry->flags & | |
999 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1000 | ((tt_common_entry->flags & | |
1001 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1002 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
1003 | no_purge ? 0 : last_seen_msecs, |
1004 | vlan->tt.crc); | |
1005 | ||
1006 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 1007 | } |
7aadf889 | 1008 | rcu_read_unlock(); |
c6c8fea2 | 1009 | } |
32ae9b22 ML |
1010 | out: |
1011 | if (primary_if) | |
e5d89254 | 1012 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1013 | return 0; |
c6c8fea2 SE |
1014 | } |
1015 | ||
56303d34 SE |
1016 | static void |
1017 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1018 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1019 | u16 flags, const char *message) |
c6c8fea2 | 1020 | { |
3abe4adb | 1021 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1022 | |
015758d0 AQ |
1023 | /* The local client has to be marked as "pending to be removed" but has |
1024 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1025 | * response issued before the net ttvn increment (consistency check) |
1026 | */ | |
acd34afa | 1027 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1028 | |
39c75a51 | 1029 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1030 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1031 | tt_local_entry->common.addr, | |
1032 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1033 | } |
1034 | ||
7f91d06c AQ |
1035 | /** |
1036 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1037 | * @bat_priv: the bat priv with all the soft interface information | |
1038 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1039 | * @vid: VLAN identifier |
7f91d06c AQ |
1040 | * @message: message to append to the log on deletion |
1041 | * @roaming: true if the deletion is due to a roaming event | |
1042 | * | |
1043 | * Returns the flags assigned to the local entry before being deleted | |
1044 | */ | |
6b5e971a SE |
1045 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1046 | unsigned short vid, const char *message, | |
1047 | bool roaming) | |
c6c8fea2 | 1048 | { |
170173bf | 1049 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1050 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
35df3b29 | 1051 | struct batadv_softif_vlan *vlan; |
ef72706a | 1052 | void *tt_entry_exists; |
c6c8fea2 | 1053 | |
c018ad3d | 1054 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1055 | if (!tt_local_entry) |
1056 | goto out; | |
1057 | ||
7f91d06c AQ |
1058 | curr_flags = tt_local_entry->common.flags; |
1059 | ||
acd34afa | 1060 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1061 | /* if this global entry addition is due to a roaming, the node has to |
1062 | * mark the local entry as "roamed" in order to correctly reroute | |
1063 | * packets later | |
1064 | */ | |
7c1fd91d | 1065 | if (roaming) { |
acd34afa | 1066 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1067 | /* mark the local client as ROAMed */ |
1068 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1069 | } | |
42d0b044 | 1070 | |
068ee6e2 AQ |
1071 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1072 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1073 | message); | |
1074 | goto out; | |
1075 | } | |
1076 | /* if this client has been added right now, it is possible to | |
1077 | * immediately purge it | |
1078 | */ | |
3abe4adb | 1079 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1080 | |
1081 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1082 | batadv_compare_tt, | |
1083 | batadv_choose_tt, | |
1084 | &tt_local_entry->common); | |
1085 | if (!tt_entry_exists) | |
1086 | goto out; | |
1087 | ||
1088 | /* extra call to free the local tt entry */ | |
068ee6e2 | 1089 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c | 1090 | |
35df3b29 AQ |
1091 | /* decrease the reference held for this vlan */ |
1092 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc ML |
1093 | if (!vlan) |
1094 | goto out; | |
1095 | ||
35df3b29 AQ |
1096 | batadv_softif_vlan_free_ref(vlan); |
1097 | batadv_softif_vlan_free_ref(vlan); | |
1098 | ||
7683fdc1 AQ |
1099 | out: |
1100 | if (tt_local_entry) | |
a513088d | 1101 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1102 | |
1103 | return curr_flags; | |
c6c8fea2 SE |
1104 | } |
1105 | ||
a19d3d85 ML |
1106 | /** |
1107 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1108 | * @bat_priv: the bat priv with all the soft interface information | |
1109 | * @head: pointer to the list containing the local tt entries | |
1110 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1111 | * inactive or not | |
1112 | */ | |
56303d34 | 1113 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1114 | struct hlist_head *head, |
1115 | int timeout) | |
c6c8fea2 | 1116 | { |
56303d34 SE |
1117 | struct batadv_tt_local_entry *tt_local_entry; |
1118 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1119 | struct hlist_node *node_tmp; |
acd34afa | 1120 | |
b67bfe0d | 1121 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1122 | hash_entry) { |
1123 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1124 | struct batadv_tt_local_entry, |
1125 | common); | |
acd34afa SE |
1126 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1127 | continue; | |
1128 | ||
1129 | /* entry already marked for deletion */ | |
1130 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1131 | continue; | |
1132 | ||
a19d3d85 | 1133 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1134 | continue; |
1135 | ||
1136 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1137 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1138 | } | |
1139 | } | |
1140 | ||
a19d3d85 ML |
1141 | /** |
1142 | * batadv_tt_local_purge - purge inactive tt local entries | |
1143 | * @bat_priv: the bat priv with all the soft interface information | |
1144 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1145 | * inactive or not | |
1146 | */ | |
1147 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1148 | int timeout) | |
acd34afa | 1149 | { |
807736f6 | 1150 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1151 | struct hlist_head *head; |
7683fdc1 | 1152 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1153 | u32 i; |
c6c8fea2 | 1154 | |
c6c8fea2 SE |
1155 | for (i = 0; i < hash->size; i++) { |
1156 | head = &hash->table[i]; | |
7683fdc1 | 1157 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1158 | |
7683fdc1 | 1159 | spin_lock_bh(list_lock); |
a19d3d85 | 1160 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1161 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1162 | } |
c6c8fea2 SE |
1163 | } |
1164 | ||
56303d34 | 1165 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1166 | { |
5bf74e9c | 1167 | struct batadv_hashtable *hash; |
a73105b8 | 1168 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1169 | struct batadv_tt_common_entry *tt_common_entry; |
1170 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 1171 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 1172 | struct hlist_node *node_tmp; |
7683fdc1 | 1173 | struct hlist_head *head; |
6b5e971a | 1174 | u32 i; |
a73105b8 | 1175 | |
807736f6 | 1176 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1177 | return; |
1178 | ||
807736f6 | 1179 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1180 | |
1181 | for (i = 0; i < hash->size; i++) { | |
1182 | head = &hash->table[i]; | |
1183 | list_lock = &hash->list_locks[i]; | |
1184 | ||
1185 | spin_lock_bh(list_lock); | |
b67bfe0d | 1186 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1187 | head, hash_entry) { |
b67bfe0d | 1188 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1189 | tt_local = container_of(tt_common_entry, |
1190 | struct batadv_tt_local_entry, | |
1191 | common); | |
35df3b29 AQ |
1192 | |
1193 | /* decrease the reference held for this vlan */ | |
1194 | vlan = batadv_softif_vlan_get(bat_priv, | |
1195 | tt_common_entry->vid); | |
354136bc ML |
1196 | if (vlan) { |
1197 | batadv_softif_vlan_free_ref(vlan); | |
1198 | batadv_softif_vlan_free_ref(vlan); | |
1199 | } | |
35df3b29 | 1200 | |
56303d34 | 1201 | batadv_tt_local_entry_free_ref(tt_local); |
a73105b8 AQ |
1202 | } |
1203 | spin_unlock_bh(list_lock); | |
1204 | } | |
1205 | ||
1a8eaf07 | 1206 | batadv_hash_destroy(hash); |
a73105b8 | 1207 | |
807736f6 | 1208 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1209 | } |
1210 | ||
56303d34 | 1211 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1212 | { |
807736f6 | 1213 | if (bat_priv->tt.global_hash) |
5346c35e | 1214 | return 0; |
c6c8fea2 | 1215 | |
807736f6 | 1216 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1217 | |
807736f6 | 1218 | if (!bat_priv->tt.global_hash) |
5346c35e | 1219 | return -ENOMEM; |
c6c8fea2 | 1220 | |
dec05074 AQ |
1221 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1222 | &batadv_tt_global_hash_lock_class_key); | |
1223 | ||
5346c35e | 1224 | return 0; |
c6c8fea2 SE |
1225 | } |
1226 | ||
56303d34 | 1227 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1228 | { |
56303d34 | 1229 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1230 | |
807736f6 | 1231 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1232 | |
807736f6 | 1233 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1234 | list) { |
1235 | list_del(&entry->list); | |
1236 | kfree(entry); | |
1237 | } | |
c6c8fea2 | 1238 | |
807736f6 SE |
1239 | atomic_set(&bat_priv->tt.local_changes, 0); |
1240 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1241 | } |
c6c8fea2 | 1242 | |
d657e621 AQ |
1243 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1244 | * batadv_tt_global_entry list | |
1245 | * | |
1246 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1247 | */ |
d657e621 AQ |
1248 | static struct batadv_tt_orig_list_entry * |
1249 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1250 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1251 | { |
d657e621 | 1252 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1253 | const struct hlist_head *head; |
db08e6e5 SW |
1254 | |
1255 | rcu_read_lock(); | |
1256 | head = &entry->orig_list; | |
b67bfe0d | 1257 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1258 | if (tmp_orig_entry->orig_node != orig_node) |
1259 | continue; | |
1260 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1261 | continue; | |
1262 | ||
1263 | orig_entry = tmp_orig_entry; | |
1264 | break; | |
db08e6e5 SW |
1265 | } |
1266 | rcu_read_unlock(); | |
d657e621 AQ |
1267 | |
1268 | return orig_entry; | |
1269 | } | |
1270 | ||
1271 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1272 | * returns true if found, false otherwise | |
1273 | */ | |
1274 | static bool | |
1275 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1276 | const struct batadv_orig_node *orig_node) | |
1277 | { | |
1278 | struct batadv_tt_orig_list_entry *orig_entry; | |
1279 | bool found = false; | |
1280 | ||
1281 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1282 | if (orig_entry) { | |
1283 | found = true; | |
1284 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1285 | } | |
1286 | ||
db08e6e5 SW |
1287 | return found; |
1288 | } | |
1289 | ||
a513088d | 1290 | static void |
d657e621 | 1291 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1292 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1293 | { |
56303d34 | 1294 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1295 | |
d657e621 | 1296 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1297 | if (orig_entry) { |
1298 | /* refresh the ttvn: the current value could be a bogus one that | |
1299 | * was added during a "temporary client detection" | |
1300 | */ | |
1301 | orig_entry->ttvn = ttvn; | |
d657e621 | 1302 | goto out; |
30cfd02b | 1303 | } |
d657e621 | 1304 | |
db08e6e5 SW |
1305 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1306 | if (!orig_entry) | |
d657e621 | 1307 | goto out; |
db08e6e5 SW |
1308 | |
1309 | INIT_HLIST_NODE(&orig_entry->list); | |
1310 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1311 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1312 | orig_entry->orig_node = orig_node; |
1313 | orig_entry->ttvn = ttvn; | |
d657e621 | 1314 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1315 | |
d657e621 | 1316 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1317 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1318 | &tt_global->orig_list); |
1319 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1320 | atomic_inc(&tt_global->orig_list_count); |
1321 | ||
d657e621 AQ |
1322 | out: |
1323 | if (orig_entry) | |
1324 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1325 | } |
1326 | ||
d4ff40f6 AQ |
1327 | /** |
1328 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1329 | * @bat_priv: the bat priv with all the soft interface information | |
1330 | * @orig_node: the originator announcing the client | |
1331 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1332 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1333 | * @flags: TT flags that have to be set for this non-mesh client |
1334 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1335 | * | |
1336 | * Add a new TT global entry for the given originator. If the entry already | |
1337 | * exists add a new reference to the given originator (a global entry can have | |
1338 | * references to multiple originators) and adjust the flags attribute to reflect | |
1339 | * the function argument. | |
1340 | * If a TT local entry exists for this non-mesh client remove it. | |
1341 | * | |
1342 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1343 | * |
1344 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1345 | */ |
1e5d49fc AQ |
1346 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1347 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1348 | const unsigned char *tt_addr, |
6b5e971a | 1349 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1350 | { |
170173bf SE |
1351 | struct batadv_tt_global_entry *tt_global_entry; |
1352 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1353 | bool ret = false; |
80b3f58c | 1354 | int hash_added; |
56303d34 | 1355 | struct batadv_tt_common_entry *common; |
6b5e971a | 1356 | u16 local_flags; |
c6c8fea2 | 1357 | |
cfd4f757 AQ |
1358 | /* ignore global entries from backbone nodes */ |
1359 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1360 | return true; | |
1361 | ||
c018ad3d AQ |
1362 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1363 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1364 | |
1365 | /* if the node already has a local client for this entry, it has to wait | |
1366 | * for a roaming advertisement instead of manually messing up the global | |
1367 | * table | |
1368 | */ | |
1369 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1370 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1371 | goto out; | |
a73105b8 AQ |
1372 | |
1373 | if (!tt_global_entry) { | |
d4f44692 | 1374 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1375 | if (!tt_global_entry) |
7683fdc1 AQ |
1376 | goto out; |
1377 | ||
c0a55929 | 1378 | common = &tt_global_entry->common; |
8fdd0153 | 1379 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1380 | common->vid = vid; |
db08e6e5 | 1381 | |
d4f44692 | 1382 | common->flags = flags; |
cc47f66e | 1383 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1384 | /* node must store current time in case of roaming. This is |
1385 | * needed to purge this entry out on timeout (if nobody claims | |
1386 | * it) | |
1387 | */ | |
1388 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1389 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1390 | atomic_set(&common->refcount, 2); |
30cfd02b | 1391 | common->added_at = jiffies; |
db08e6e5 SW |
1392 | |
1393 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1394 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1395 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1396 | |
807736f6 | 1397 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1398 | batadv_compare_tt, |
c018ad3d | 1399 | batadv_choose_tt, common, |
a513088d | 1400 | &common->hash_entry); |
80b3f58c SW |
1401 | |
1402 | if (unlikely(hash_added != 0)) { | |
1403 | /* remove the reference for the hash */ | |
a513088d | 1404 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1405 | goto out_remove; |
1406 | } | |
a73105b8 | 1407 | } else { |
068ee6e2 | 1408 | common = &tt_global_entry->common; |
30cfd02b AQ |
1409 | /* If there is already a global entry, we can use this one for |
1410 | * our processing. | |
068ee6e2 AQ |
1411 | * But if we are trying to add a temporary client then here are |
1412 | * two options at this point: | |
1413 | * 1) the global client is not a temporary client: the global | |
1414 | * client has to be left as it is, temporary information | |
1415 | * should never override any already known client state | |
1416 | * 2) the global client is a temporary client: purge the | |
1417 | * originator list and add the new one orig_entry | |
30cfd02b | 1418 | */ |
068ee6e2 AQ |
1419 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1420 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1421 | goto out; | |
1422 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1423 | orig_node)) | |
1424 | goto out_remove; | |
1425 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1426 | goto add_orig_entry; | |
1427 | } | |
30cfd02b AQ |
1428 | |
1429 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1430 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1431 | * remove the previous temporary orig node and re-add it | |
1432 | * if required. If the orig entry changed, the new one which | |
1433 | * is a non-temporary entry is preferred. | |
30cfd02b | 1434 | */ |
a6cb3909 SW |
1435 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1436 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1437 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1438 | } | |
db08e6e5 | 1439 | |
e9c00136 AQ |
1440 | /* the change can carry possible "attribute" flags like the |
1441 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1442 | * client entry | |
1443 | */ | |
ad7e2c46 | 1444 | common->flags |= flags; |
e9c00136 | 1445 | |
acd34afa SE |
1446 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1447 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1448 | * delete + roaming change for this originator. |
1449 | * | |
1450 | * We should first delete the old originator before adding the | |
1451 | * new one. | |
1452 | */ | |
068ee6e2 | 1453 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1454 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1455 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1456 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1457 | } |
1458 | } | |
068ee6e2 | 1459 | add_orig_entry: |
30cfd02b | 1460 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1461 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1462 | |
39c75a51 | 1463 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1464 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1465 | common->addr, BATADV_PRINT_VID(common->vid), | |
1466 | orig_node->orig); | |
1e5d49fc | 1467 | ret = true; |
c6c8fea2 | 1468 | |
80b3f58c | 1469 | out_remove: |
c5caf4ef LL |
1470 | /* Do not remove multicast addresses from the local hash on |
1471 | * global additions | |
1472 | */ | |
1473 | if (is_multicast_ether_addr(tt_addr)) | |
1474 | goto out; | |
7f91d06c | 1475 | |
a73105b8 | 1476 | /* remove address from local hash if present */ |
c018ad3d | 1477 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1478 | "global tt received", |
c1d07431 | 1479 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1480 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1481 | ||
068ee6e2 AQ |
1482 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1483 | /* this is a normal global add. Therefore the client is not in a | |
1484 | * roaming state anymore. | |
1485 | */ | |
1486 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1487 | ||
7683fdc1 AQ |
1488 | out: |
1489 | if (tt_global_entry) | |
a513088d | 1490 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1491 | if (tt_local_entry) |
1492 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1493 | return ret; |
c6c8fea2 SE |
1494 | } |
1495 | ||
1b371d13 SW |
1496 | /** |
1497 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1498 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1499 | * @tt_global_entry: global translation table entry to be analyzed |
1500 | * | |
1501 | * This functon assumes the caller holds rcu_read_lock(). | |
1502 | * Returns best originator list entry or NULL on errors. | |
1503 | */ | |
1504 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1505 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1506 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1507 | { |
4627456a AQ |
1508 | struct batadv_neigh_node *router, *best_router = NULL; |
1509 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1510 | struct hlist_head *head; |
981d8900 | 1511 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1512 | |
1513 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1514 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1515 | router = batadv_orig_router_get(orig_entry->orig_node, |
1516 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1517 | if (!router) |
1518 | continue; | |
1519 | ||
4627456a | 1520 | if (best_router && |
89652331 SW |
1521 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1522 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1523 | batadv_neigh_node_free_ref(router); |
1524 | continue; | |
981d8900 SE |
1525 | } |
1526 | ||
4627456a AQ |
1527 | /* release the refcount for the "old" best */ |
1528 | if (best_router) | |
1529 | batadv_neigh_node_free_ref(best_router); | |
1530 | ||
1531 | best_entry = orig_entry; | |
1532 | best_router = router; | |
981d8900 SE |
1533 | } |
1534 | ||
4627456a AQ |
1535 | if (best_router) |
1536 | batadv_neigh_node_free_ref(best_router); | |
1537 | ||
981d8900 SE |
1538 | return best_entry; |
1539 | } | |
1540 | ||
1b371d13 SW |
1541 | /** |
1542 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1543 | * for this global entry | |
4627456a | 1544 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1545 | * @tt_global_entry: global translation table entry to be printed |
1546 | * @seq: debugfs table seq_file struct | |
1547 | * | |
1548 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1549 | */ |
a513088d | 1550 | static void |
4627456a AQ |
1551 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1552 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1553 | struct seq_file *seq) |
db08e6e5 | 1554 | { |
981d8900 | 1555 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1556 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1557 | struct batadv_orig_node_vlan *vlan; |
1558 | struct hlist_head *head; | |
6b5e971a SE |
1559 | u8 last_ttvn; |
1560 | u16 flags; | |
db08e6e5 SW |
1561 | |
1562 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1563 | flags = tt_common_entry->flags; |
1564 | ||
4627456a | 1565 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1566 | if (best_entry) { |
7ea7b4a1 AQ |
1567 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1568 | tt_common_entry->vid); | |
1569 | if (!vlan) { | |
1570 | seq_printf(seq, | |
1571 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1572 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1573 | best_entry->orig_node->orig); | |
1574 | goto print_list; | |
1575 | } | |
1576 | ||
981d8900 | 1577 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1578 | seq_printf(seq, |
dd24ddb2 | 1579 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1580 | '*', tt_global_entry->common.addr, |
16052789 | 1581 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1582 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1583 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1584 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1585 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1586 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1587 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1588 | |
1589 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1590 | } |
db08e6e5 | 1591 | |
7ea7b4a1 | 1592 | print_list: |
db08e6e5 SW |
1593 | head = &tt_global_entry->orig_list; |
1594 | ||
b67bfe0d | 1595 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1596 | if (best_entry == orig_entry) |
1597 | continue; | |
1598 | ||
7ea7b4a1 AQ |
1599 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1600 | tt_common_entry->vid); | |
1601 | if (!vlan) { | |
1602 | seq_printf(seq, | |
1603 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1604 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1605 | orig_entry->orig_node->orig); | |
1606 | continue; | |
1607 | } | |
1608 | ||
db08e6e5 | 1609 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1610 | seq_printf(seq, |
dd24ddb2 | 1611 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1612 | '+', tt_global_entry->common.addr, |
16052789 | 1613 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1614 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1615 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1616 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1617 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1618 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1619 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1620 | |
1621 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1622 | } |
1623 | } | |
1624 | ||
08c36d3e | 1625 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1626 | { |
1627 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1628 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1629 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1630 | struct batadv_tt_common_entry *tt_common_entry; |
1631 | struct batadv_tt_global_entry *tt_global; | |
1632 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1633 | struct hlist_head *head; |
6b5e971a | 1634 | u32 i; |
c6c8fea2 | 1635 | |
30da63a6 ML |
1636 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1637 | if (!primary_if) | |
32ae9b22 | 1638 | goto out; |
c6c8fea2 | 1639 | |
2dafb49d AQ |
1640 | seq_printf(seq, |
1641 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1642 | net_dev->name); |
16052789 AQ |
1643 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1644 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1645 | "CRC", "Flags"); | |
c6c8fea2 | 1646 | |
c6c8fea2 SE |
1647 | for (i = 0; i < hash->size; i++) { |
1648 | head = &hash->table[i]; | |
1649 | ||
7aadf889 | 1650 | rcu_read_lock(); |
b67bfe0d | 1651 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1652 | head, hash_entry) { |
56303d34 SE |
1653 | tt_global = container_of(tt_common_entry, |
1654 | struct batadv_tt_global_entry, | |
1655 | common); | |
4627456a | 1656 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1657 | } |
7aadf889 | 1658 | rcu_read_unlock(); |
c6c8fea2 | 1659 | } |
32ae9b22 ML |
1660 | out: |
1661 | if (primary_if) | |
e5d89254 | 1662 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1663 | return 0; |
c6c8fea2 SE |
1664 | } |
1665 | ||
1d8ab8d3 | 1666 | /** |
433ff98f | 1667 | * _batadv_tt_global_del_orig_entry - remove and free an orig_entry |
1d8ab8d3 LL |
1668 | * @tt_global_entry: the global entry to remove the orig_entry from |
1669 | * @orig_entry: the orig entry to remove and free | |
1670 | * | |
1671 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1672 | * free this orig_entry afterwards. | |
433ff98f ML |
1673 | * |
1674 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
1675 | * part of a list. | |
1d8ab8d3 LL |
1676 | */ |
1677 | static void | |
433ff98f ML |
1678 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
1679 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 1680 | { |
2c72d655 SE |
1681 | lockdep_assert_held(&tt_global_entry->list_lock); |
1682 | ||
1d8ab8d3 LL |
1683 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1684 | tt_global_entry->common.vid); | |
1685 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
1686 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
1687 | * being part of a list | |
1688 | */ | |
1d8ab8d3 LL |
1689 | hlist_del_rcu(&orig_entry->list); |
1690 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1691 | } | |
1692 | ||
db08e6e5 | 1693 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1694 | static void |
56303d34 | 1695 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1696 | { |
db08e6e5 | 1697 | struct hlist_head *head; |
b67bfe0d | 1698 | struct hlist_node *safe; |
56303d34 | 1699 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1700 | |
db08e6e5 SW |
1701 | spin_lock_bh(&tt_global_entry->list_lock); |
1702 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 1703 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 1704 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 1705 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1706 | } |
1707 | ||
1d8ab8d3 LL |
1708 | /** |
1709 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1710 | * @bat_priv: the bat priv with all the soft interface information | |
1711 | * @tt_global_entry: the global entry to remove the orig_node from | |
1712 | * @orig_node: the originator announcing the client | |
1713 | * @message: message to append to the log on deletion | |
1714 | * | |
1715 | * Remove the given orig_node and its according orig_entry from the given | |
1716 | * global tt entry. | |
1717 | */ | |
a513088d | 1718 | static void |
1d8ab8d3 LL |
1719 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1720 | struct batadv_tt_global_entry *tt_global_entry, | |
1721 | struct batadv_orig_node *orig_node, | |
1722 | const char *message) | |
db08e6e5 SW |
1723 | { |
1724 | struct hlist_head *head; | |
b67bfe0d | 1725 | struct hlist_node *safe; |
56303d34 | 1726 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1727 | unsigned short vid; |
db08e6e5 SW |
1728 | |
1729 | spin_lock_bh(&tt_global_entry->list_lock); | |
1730 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1731 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1732 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1733 | vid = tt_global_entry->common.vid; |
39c75a51 | 1734 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1735 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1736 | orig_node->orig, |
16052789 AQ |
1737 | tt_global_entry->common.addr, |
1738 | BATADV_PRINT_VID(vid), message); | |
433ff98f ML |
1739 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
1740 | orig_entry); | |
db08e6e5 SW |
1741 | } |
1742 | } | |
1743 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1744 | } | |
1745 | ||
db08e6e5 | 1746 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1747 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1748 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1749 | */ |
a513088d | 1750 | static void |
56303d34 SE |
1751 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1752 | struct batadv_tt_global_entry *tt_global_entry, | |
1753 | struct batadv_orig_node *orig_node, | |
1754 | const char *message) | |
db08e6e5 SW |
1755 | { |
1756 | bool last_entry = true; | |
1757 | struct hlist_head *head; | |
56303d34 | 1758 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1759 | |
1760 | /* no local entry exists, case 1: | |
1761 | * Check if this is the last one or if other entries exist. | |
1762 | */ | |
1763 | ||
1764 | rcu_read_lock(); | |
1765 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1766 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1767 | if (orig_entry->orig_node != orig_node) { |
1768 | last_entry = false; | |
1769 | break; | |
1770 | } | |
1771 | } | |
1772 | rcu_read_unlock(); | |
1773 | ||
1774 | if (last_entry) { | |
1775 | /* its the last one, mark for roaming. */ | |
acd34afa | 1776 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1777 | tt_global_entry->roam_at = jiffies; |
1778 | } else | |
1779 | /* there is another entry, we can simply delete this | |
1780 | * one and can still use the other one. | |
1781 | */ | |
1d8ab8d3 LL |
1782 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1783 | orig_node, message); | |
db08e6e5 SW |
1784 | } |
1785 | ||
c018ad3d AQ |
1786 | /** |
1787 | * batadv_tt_global_del - remove a client from the global table | |
1788 | * @bat_priv: the bat priv with all the soft interface information | |
1789 | * @orig_node: an originator serving this client | |
1790 | * @addr: the mac address of the client | |
1791 | * @vid: VLAN identifier | |
1792 | * @message: a message explaining the reason for deleting the client to print | |
1793 | * for debugging purpose | |
1794 | * @roaming: true if the deletion has been triggered by a roaming event | |
1795 | */ | |
56303d34 SE |
1796 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1797 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1798 | const unsigned char *addr, unsigned short vid, |
a513088d | 1799 | const char *message, bool roaming) |
a73105b8 | 1800 | { |
170173bf | 1801 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1802 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1803 | |
c018ad3d | 1804 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1805 | if (!tt_global_entry) |
7683fdc1 | 1806 | goto out; |
a73105b8 | 1807 | |
db08e6e5 | 1808 | if (!roaming) { |
1d8ab8d3 LL |
1809 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1810 | orig_node, message); | |
db08e6e5 SW |
1811 | |
1812 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1813 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1814 | message); | |
db08e6e5 SW |
1815 | |
1816 | goto out; | |
1817 | } | |
92f90f56 SE |
1818 | |
1819 | /* if we are deleting a global entry due to a roam | |
1820 | * event, there are two possibilities: | |
db08e6e5 SW |
1821 | * 1) the client roamed from node A to node B => if there |
1822 | * is only one originator left for this client, we mark | |
acd34afa | 1823 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1824 | * wait for node B to claim it. In case of timeout |
1825 | * the entry is purged. | |
db08e6e5 SW |
1826 | * |
1827 | * If there are other originators left, we directly delete | |
1828 | * the originator. | |
92f90f56 | 1829 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1830 | * the global entry, since it is useless now. |
1831 | */ | |
a513088d | 1832 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1833 | tt_global_entry->common.addr, |
1834 | vid); | |
a513088d | 1835 | if (local_entry) { |
db08e6e5 | 1836 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1837 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1838 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1839 | } else |
1840 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1841 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1842 | orig_node, message); | |
92f90f56 | 1843 | |
cc47f66e | 1844 | out: |
7683fdc1 | 1845 | if (tt_global_entry) |
a513088d SE |
1846 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1847 | if (local_entry) | |
1848 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1849 | } |
1850 | ||
95fb130d AQ |
1851 | /** |
1852 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1853 | * given originator matching the provided vid | |
1854 | * @bat_priv: the bat priv with all the soft interface information | |
1855 | * @orig_node: the originator owning the entries to remove | |
1856 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1857 | * removed | |
1858 | * @message: debug message to print as "reason" | |
1859 | */ | |
56303d34 SE |
1860 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1861 | struct batadv_orig_node *orig_node, | |
6b5e971a | 1862 | s32 match_vid, |
56303d34 | 1863 | const char *message) |
c6c8fea2 | 1864 | { |
56303d34 SE |
1865 | struct batadv_tt_global_entry *tt_global; |
1866 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 1867 | u32 i; |
807736f6 | 1868 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1869 | struct hlist_node *safe; |
a73105b8 | 1870 | struct hlist_head *head; |
7683fdc1 | 1871 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1872 | unsigned short vid; |
c6c8fea2 | 1873 | |
6e801494 SW |
1874 | if (!hash) |
1875 | return; | |
1876 | ||
a73105b8 AQ |
1877 | for (i = 0; i < hash->size; i++) { |
1878 | head = &hash->table[i]; | |
7683fdc1 | 1879 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1880 | |
7683fdc1 | 1881 | spin_lock_bh(list_lock); |
b67bfe0d | 1882 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1883 | head, hash_entry) { |
95fb130d AQ |
1884 | /* remove only matching entries */ |
1885 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1886 | continue; | |
1887 | ||
56303d34 SE |
1888 | tt_global = container_of(tt_common_entry, |
1889 | struct batadv_tt_global_entry, | |
1890 | common); | |
db08e6e5 | 1891 | |
1d8ab8d3 LL |
1892 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1893 | orig_node, message); | |
db08e6e5 | 1894 | |
56303d34 | 1895 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1896 | vid = tt_global->common.vid; |
39c75a51 | 1897 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1898 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1899 | tt_global->common.addr, | |
1900 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1901 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1902 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1903 | } |
a73105b8 | 1904 | } |
7683fdc1 | 1905 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1906 | } |
ac4eebd4 | 1907 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
1908 | } |
1909 | ||
30cfd02b AQ |
1910 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1911 | char **msg) | |
cc47f66e | 1912 | { |
30cfd02b AQ |
1913 | bool purge = false; |
1914 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1915 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1916 | |
30cfd02b AQ |
1917 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1918 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1919 | purge = true; | |
1920 | *msg = "Roaming timeout\n"; | |
1921 | } | |
42d0b044 | 1922 | |
30cfd02b AQ |
1923 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1924 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1925 | purge = true; | |
1926 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1927 | } |
30cfd02b AQ |
1928 | |
1929 | return purge; | |
42d0b044 SE |
1930 | } |
1931 | ||
30cfd02b | 1932 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1933 | { |
807736f6 | 1934 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1935 | struct hlist_head *head; |
b67bfe0d | 1936 | struct hlist_node *node_tmp; |
7683fdc1 | 1937 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1938 | u32 i; |
30cfd02b AQ |
1939 | char *msg = NULL; |
1940 | struct batadv_tt_common_entry *tt_common; | |
1941 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1942 | |
cc47f66e AQ |
1943 | for (i = 0; i < hash->size; i++) { |
1944 | head = &hash->table[i]; | |
7683fdc1 | 1945 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1946 | |
7683fdc1 | 1947 | spin_lock_bh(list_lock); |
b67bfe0d | 1948 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1949 | hash_entry) { |
1950 | tt_global = container_of(tt_common, | |
1951 | struct batadv_tt_global_entry, | |
1952 | common); | |
1953 | ||
1954 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1955 | continue; | |
1956 | ||
1957 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1958 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1959 | tt_global->common.addr, | |
1960 | BATADV_PRINT_VID(tt_global->common.vid), | |
1961 | msg); | |
30cfd02b | 1962 | |
b67bfe0d | 1963 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1964 | |
1965 | batadv_tt_global_entry_free_ref(tt_global); | |
1966 | } | |
7683fdc1 | 1967 | spin_unlock_bh(list_lock); |
cc47f66e | 1968 | } |
cc47f66e AQ |
1969 | } |
1970 | ||
56303d34 | 1971 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1972 | { |
5bf74e9c | 1973 | struct batadv_hashtable *hash; |
7683fdc1 | 1974 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1975 | struct batadv_tt_common_entry *tt_common_entry; |
1976 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1977 | struct hlist_node *node_tmp; |
7683fdc1 | 1978 | struct hlist_head *head; |
6b5e971a | 1979 | u32 i; |
7683fdc1 | 1980 | |
807736f6 | 1981 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1982 | return; |
1983 | ||
807736f6 | 1984 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1985 | |
1986 | for (i = 0; i < hash->size; i++) { | |
1987 | head = &hash->table[i]; | |
1988 | list_lock = &hash->list_locks[i]; | |
1989 | ||
1990 | spin_lock_bh(list_lock); | |
b67bfe0d | 1991 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1992 | head, hash_entry) { |
b67bfe0d | 1993 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1994 | tt_global = container_of(tt_common_entry, |
1995 | struct batadv_tt_global_entry, | |
1996 | common); | |
1997 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1998 | } |
1999 | spin_unlock_bh(list_lock); | |
2000 | } | |
2001 | ||
1a8eaf07 | 2002 | batadv_hash_destroy(hash); |
7683fdc1 | 2003 | |
807736f6 | 2004 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2005 | } |
2006 | ||
56303d34 SE |
2007 | static bool |
2008 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2009 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
2010 | { |
2011 | bool ret = false; | |
2012 | ||
acd34afa SE |
2013 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2014 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
2015 | ret = true; |
2016 | ||
2d2fcc2a AQ |
2017 | /* check if the two clients are marked as isolated */ |
2018 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2019 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
2020 | ret = true; | |
2021 | ||
59b699cd AQ |
2022 | return ret; |
2023 | } | |
2024 | ||
c018ad3d AQ |
2025 | /** |
2026 | * batadv_transtable_search - get the mesh destination for a given client | |
2027 | * @bat_priv: the bat priv with all the soft interface information | |
2028 | * @src: mac address of the source client | |
2029 | * @addr: mac address of the destination client | |
2030 | * @vid: VLAN identifier | |
2031 | * | |
2032 | * Returns a pointer to the originator that was selected as destination in the | |
2033 | * mesh for contacting the client 'addr', NULL otherwise. | |
2034 | * In case of multiple originators serving the same client, the function returns | |
2035 | * the best one (best in terms of metric towards the destination node). | |
2036 | * | |
2037 | * If the two clients are AP isolated the function returns NULL. | |
2038 | */ | |
56303d34 | 2039 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2040 | const u8 *src, |
2041 | const u8 *addr, | |
c018ad3d | 2042 | unsigned short vid) |
c6c8fea2 | 2043 | { |
56303d34 SE |
2044 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2045 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2046 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2047 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2048 | |
eceb22ae | 2049 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2050 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2051 | if (!tt_local_entry || |
2052 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2053 | goto out; |
2054 | } | |
7aadf889 | 2055 | |
c018ad3d | 2056 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2057 | if (!tt_global_entry) |
7b36e8ee | 2058 | goto out; |
7aadf889 | 2059 | |
3d393e47 | 2060 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2061 | * isolation |
2062 | */ | |
a513088d SE |
2063 | if (tt_local_entry && |
2064 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2065 | goto out; |
2066 | ||
db08e6e5 | 2067 | rcu_read_lock(); |
4627456a | 2068 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2069 | /* found anything? */ |
981d8900 SE |
2070 | if (best_entry) |
2071 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
2072 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
2073 | orig_node = NULL; | |
2074 | rcu_read_unlock(); | |
981d8900 | 2075 | |
7b36e8ee | 2076 | out: |
3d393e47 | 2077 | if (tt_global_entry) |
a513088d | 2078 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 2079 | if (tt_local_entry) |
a513088d | 2080 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 2081 | |
7b36e8ee | 2082 | return orig_node; |
c6c8fea2 | 2083 | } |
a73105b8 | 2084 | |
ced72933 AQ |
2085 | /** |
2086 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2087 | * to the given orig_node | |
2088 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2089 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2090 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2091 | * |
2092 | * This function computes the checksum for the global table corresponding to a | |
2093 | * specific originator. In particular, the checksum is computed as follows: For | |
2094 | * each client connected to the originator the CRC32C of the MAC address and the | |
2095 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2096 | * together. | |
2097 | * | |
2098 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2099 | * produce a unique hash of the table, but since the order which is used to feed | |
2100 | * the CRC32C function affects the result and since every node in the network | |
2101 | * probably sorts the clients differently, the hash function cannot be directly | |
2102 | * computed over the entire table. Hence the CRC32C is used only on | |
2103 | * the single client entry, while all the results are then xor'ed together | |
2104 | * because the XOR operation can combine them all while trying to reduce the | |
2105 | * noise as much as possible. | |
2106 | * | |
2107 | * Returns the checksum of the global table of a given originator. | |
ced72933 | 2108 | */ |
6b5e971a SE |
2109 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2110 | struct batadv_orig_node *orig_node, | |
2111 | unsigned short vid) | |
a73105b8 | 2112 | { |
807736f6 | 2113 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2114 | struct batadv_tt_common_entry *tt_common; |
2115 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2116 | struct hlist_head *head; |
6b5e971a SE |
2117 | u32 i, crc_tmp, crc = 0; |
2118 | u8 flags; | |
a30e22ca | 2119 | __be16 tmp_vid; |
a73105b8 AQ |
2120 | |
2121 | for (i = 0; i < hash->size; i++) { | |
2122 | head = &hash->table[i]; | |
2123 | ||
2124 | rcu_read_lock(); | |
b67bfe0d | 2125 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2126 | tt_global = container_of(tt_common, |
2127 | struct batadv_tt_global_entry, | |
2128 | common); | |
7ea7b4a1 AQ |
2129 | /* compute the CRC only for entries belonging to the |
2130 | * VLAN identified by the vid passed as parameter | |
2131 | */ | |
2132 | if (tt_common->vid != vid) | |
2133 | continue; | |
2134 | ||
db08e6e5 SW |
2135 | /* Roaming clients are in the global table for |
2136 | * consistency only. They don't have to be | |
2137 | * taken into account while computing the | |
2138 | * global crc | |
2139 | */ | |
acd34afa | 2140 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2141 | continue; |
30cfd02b AQ |
2142 | /* Temporary clients have not been announced yet, so |
2143 | * they have to be skipped while computing the global | |
2144 | * crc | |
2145 | */ | |
2146 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2147 | continue; | |
db08e6e5 SW |
2148 | |
2149 | /* find out if this global entry is announced by this | |
2150 | * originator | |
2151 | */ | |
56303d34 | 2152 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2153 | orig_node)) |
db08e6e5 SW |
2154 | continue; |
2155 | ||
a30e22ca AQ |
2156 | /* use network order to read the VID: this ensures that |
2157 | * every node reads the bytes in the same order. | |
2158 | */ | |
2159 | tmp_vid = htons(tt_common->vid); | |
2160 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2161 | |
2162 | /* compute the CRC on flags that have to be kept in sync | |
2163 | * among nodes | |
2164 | */ | |
2165 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2166 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2167 | ||
0ffa9e8d | 2168 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2169 | } |
2170 | rcu_read_unlock(); | |
2171 | } | |
2172 | ||
ced72933 | 2173 | return crc; |
a73105b8 AQ |
2174 | } |
2175 | ||
ced72933 AQ |
2176 | /** |
2177 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2178 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2179 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2180 | * |
2181 | * For details about the computation, please refer to the documentation for | |
2182 | * batadv_tt_global_crc(). | |
2183 | * | |
2184 | * Returns the checksum of the local table | |
ced72933 | 2185 | */ |
6b5e971a SE |
2186 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2187 | unsigned short vid) | |
a73105b8 | 2188 | { |
807736f6 | 2189 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2190 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2191 | struct hlist_head *head; |
6b5e971a SE |
2192 | u32 i, crc_tmp, crc = 0; |
2193 | u8 flags; | |
a30e22ca | 2194 | __be16 tmp_vid; |
a73105b8 AQ |
2195 | |
2196 | for (i = 0; i < hash->size; i++) { | |
2197 | head = &hash->table[i]; | |
2198 | ||
2199 | rcu_read_lock(); | |
b67bfe0d | 2200 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2201 | /* compute the CRC only for entries belonging to the |
2202 | * VLAN identified by vid | |
2203 | */ | |
2204 | if (tt_common->vid != vid) | |
2205 | continue; | |
2206 | ||
058d0e26 | 2207 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2208 | * account while computing the CRC |
2209 | */ | |
acd34afa | 2210 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2211 | continue; |
ced72933 | 2212 | |
a30e22ca AQ |
2213 | /* use network order to read the VID: this ensures that |
2214 | * every node reads the bytes in the same order. | |
2215 | */ | |
2216 | tmp_vid = htons(tt_common->vid); | |
2217 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2218 | |
2219 | /* compute the CRC on flags that have to be kept in sync | |
2220 | * among nodes | |
2221 | */ | |
2222 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2223 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2224 | ||
0ffa9e8d | 2225 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2226 | } |
a73105b8 AQ |
2227 | rcu_read_unlock(); |
2228 | } | |
2229 | ||
ced72933 | 2230 | return crc; |
a73105b8 AQ |
2231 | } |
2232 | ||
56303d34 | 2233 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2234 | { |
7c26a53b ML |
2235 | struct batadv_tt_req_node *node; |
2236 | struct hlist_node *safe; | |
a73105b8 | 2237 | |
807736f6 | 2238 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2239 | |
7c26a53b ML |
2240 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2241 | hlist_del_init(&node->list); | |
a73105b8 AQ |
2242 | kfree(node); |
2243 | } | |
2244 | ||
807736f6 | 2245 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2246 | } |
2247 | ||
56303d34 SE |
2248 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2249 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2250 | const void *tt_buff, |
6b5e971a | 2251 | u16 tt_buff_len) |
a73105b8 | 2252 | { |
a73105b8 | 2253 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2254 | * last OGM (the OGM could carry no changes) |
2255 | */ | |
a73105b8 AQ |
2256 | spin_lock_bh(&orig_node->tt_buff_lock); |
2257 | if (tt_buff_len > 0) { | |
2258 | kfree(orig_node->tt_buff); | |
2259 | orig_node->tt_buff_len = 0; | |
2260 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2261 | if (orig_node->tt_buff) { | |
2262 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2263 | orig_node->tt_buff_len = tt_buff_len; | |
2264 | } | |
2265 | } | |
2266 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2267 | } | |
2268 | ||
56303d34 | 2269 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2270 | { |
7c26a53b ML |
2271 | struct batadv_tt_req_node *node; |
2272 | struct hlist_node *safe; | |
a73105b8 | 2273 | |
807736f6 | 2274 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2275 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2276 | if (batadv_has_timed_out(node->issued_at, |
2277 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2278 | hlist_del_init(&node->list); |
a73105b8 AQ |
2279 | kfree(node); |
2280 | } | |
2281 | } | |
807736f6 | 2282 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2283 | } |
2284 | ||
383b8636 ML |
2285 | /** |
2286 | * batadv_tt_req_node_new - search and possibly create a tt_req_node object | |
2287 | * @bat_priv: the bat priv with all the soft interface information | |
2288 | * @orig_node: orig node this request is being issued for | |
2289 | * | |
2290 | * Returns the pointer to the new tt_req_node struct if no request | |
2291 | * has already been issued for this orig_node, NULL otherwise. | |
9cfc7bd6 | 2292 | */ |
56303d34 | 2293 | static struct batadv_tt_req_node * |
383b8636 | 2294 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2295 | struct batadv_orig_node *orig_node) |
a73105b8 | 2296 | { |
56303d34 | 2297 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2298 | |
807736f6 | 2299 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2300 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2301 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2302 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2303 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2304 | goto unlock; |
2305 | } | |
2306 | ||
2307 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2308 | if (!tt_req_node) | |
2309 | goto unlock; | |
2310 | ||
8fdd0153 | 2311 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2312 | tt_req_node->issued_at = jiffies; |
2313 | ||
7c26a53b | 2314 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2315 | unlock: |
807736f6 | 2316 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2317 | return tt_req_node; |
2318 | } | |
2319 | ||
335fbe0f ML |
2320 | /** |
2321 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2322 | * @entry_ptr: to be checked local tt entry | |
2323 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2324 | * | |
2325 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2326 | */ | |
2327 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2328 | { |
56303d34 | 2329 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2330 | |
acd34afa | 2331 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2332 | return 0; |
2333 | return 1; | |
2334 | } | |
2335 | ||
a513088d SE |
2336 | static int batadv_tt_global_valid(const void *entry_ptr, |
2337 | const void *data_ptr) | |
a73105b8 | 2338 | { |
56303d34 SE |
2339 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2340 | const struct batadv_tt_global_entry *tt_global_entry; | |
2341 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2342 | |
30cfd02b AQ |
2343 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2344 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2345 | return 0; |
2346 | ||
56303d34 SE |
2347 | tt_global_entry = container_of(tt_common_entry, |
2348 | struct batadv_tt_global_entry, | |
48100bac AQ |
2349 | common); |
2350 | ||
a513088d | 2351 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2352 | } |
2353 | ||
335fbe0f | 2354 | /** |
7ea7b4a1 AQ |
2355 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2356 | * specified tt hash | |
335fbe0f ML |
2357 | * @bat_priv: the bat priv with all the soft interface information |
2358 | * @hash: hash table containing the tt entries | |
2359 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2360 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2361 | * @valid_cb: function to filter tt change entries |
2362 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2363 | */ |
7ea7b4a1 AQ |
2364 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2365 | struct batadv_hashtable *hash, | |
6b5e971a | 2366 | void *tvlv_buff, u16 tt_len, |
7ea7b4a1 AQ |
2367 | int (*valid_cb)(const void *, const void *), |
2368 | void *cb_data) | |
a73105b8 | 2369 | { |
56303d34 | 2370 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2371 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2372 | struct hlist_head *head; |
6b5e971a SE |
2373 | u16 tt_tot, tt_num_entries = 0; |
2374 | u32 i; | |
a73105b8 | 2375 | |
298e6e68 | 2376 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2377 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2378 | |
2379 | rcu_read_lock(); | |
2380 | for (i = 0; i < hash->size; i++) { | |
2381 | head = &hash->table[i]; | |
2382 | ||
b67bfe0d | 2383 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2384 | head, hash_entry) { |
335fbe0f | 2385 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2386 | break; |
2387 | ||
48100bac | 2388 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2389 | continue; |
2390 | ||
8fdd0153 | 2391 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2392 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2393 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2394 | memset(tt_change->reserved, 0, |
2395 | sizeof(tt_change->reserved)); | |
a73105b8 | 2396 | |
335fbe0f | 2397 | tt_num_entries++; |
a73105b8 AQ |
2398 | tt_change++; |
2399 | } | |
2400 | } | |
2401 | rcu_read_unlock(); | |
7ea7b4a1 | 2402 | } |
a73105b8 | 2403 | |
7ea7b4a1 AQ |
2404 | /** |
2405 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2406 | * @orig_node: originator for which the CRCs have to be checked | |
2407 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2408 | * @num_vlan: number of tvlv VLAN entries | |
2409 | * @create: if true, create VLAN objects if not found | |
2410 | * | |
2411 | * Return true if all the received CRCs match the locally stored ones, false | |
2412 | * otherwise | |
2413 | */ | |
2414 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2415 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2416 | u16 num_vlan) |
7ea7b4a1 AQ |
2417 | { |
2418 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2419 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 2420 | int i, orig_num_vlan; |
6b5e971a | 2421 | u32 crc; |
7ea7b4a1 AQ |
2422 | |
2423 | /* check if each received CRC matches the locally stored one */ | |
2424 | for (i = 0; i < num_vlan; i++) { | |
2425 | tt_vlan_tmp = tt_vlan + i; | |
2426 | ||
2427 | /* if orig_node is a backbone node for this VLAN, don't check | |
2428 | * the CRC as we ignore all the global entries over it | |
2429 | */ | |
2430 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2431 | orig_node->orig, |
2432 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2433 | continue; |
2434 | ||
2435 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2436 | ntohs(tt_vlan_tmp->vid)); | |
2437 | if (!vlan) | |
2438 | return false; | |
2439 | ||
91c2b1a9 AQ |
2440 | crc = vlan->tt.crc; |
2441 | batadv_orig_node_vlan_free_ref(vlan); | |
2442 | ||
2443 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2444 | return false; |
2445 | } | |
2446 | ||
c169c59d SW |
2447 | /* check if any excess VLANs exist locally for the originator |
2448 | * which are not mentioned in the TVLV from the originator. | |
2449 | */ | |
2450 | rcu_read_lock(); | |
2451 | orig_num_vlan = 0; | |
2452 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
2453 | orig_num_vlan++; | |
2454 | rcu_read_unlock(); | |
2455 | ||
2456 | if (orig_num_vlan > num_vlan) | |
2457 | return false; | |
2458 | ||
7ea7b4a1 AQ |
2459 | return true; |
2460 | } | |
2461 | ||
2462 | /** | |
2463 | * batadv_tt_local_update_crc - update all the local CRCs | |
2464 | * @bat_priv: the bat priv with all the soft interface information | |
2465 | */ | |
2466 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2467 | { | |
2468 | struct batadv_softif_vlan *vlan; | |
2469 | ||
2470 | /* recompute the global CRC for each VLAN */ | |
2471 | rcu_read_lock(); | |
2472 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2473 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2474 | } | |
2475 | rcu_read_unlock(); | |
2476 | } | |
2477 | ||
2478 | /** | |
2479 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2480 | * @bat_priv: the bat priv with all the soft interface information | |
2481 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2482 | */ | |
2483 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2484 | struct batadv_orig_node *orig_node) | |
2485 | { | |
2486 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2487 | u32 crc; |
7ea7b4a1 AQ |
2488 | |
2489 | /* recompute the global CRC for each VLAN */ | |
2490 | rcu_read_lock(); | |
d0fa4f3f | 2491 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
2492 | /* if orig_node is a backbone node for this VLAN, don't compute |
2493 | * the CRC as we ignore all the global entries over it | |
2494 | */ | |
cfd4f757 AQ |
2495 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2496 | vlan->vid)) | |
7ea7b4a1 AQ |
2497 | continue; |
2498 | ||
2499 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2500 | vlan->tt.crc = crc; | |
2501 | } | |
2502 | rcu_read_unlock(); | |
a73105b8 AQ |
2503 | } |
2504 | ||
ced72933 AQ |
2505 | /** |
2506 | * batadv_send_tt_request - send a TT Request message to a given node | |
2507 | * @bat_priv: the bat priv with all the soft interface information | |
2508 | * @dst_orig_node: the destination of the message | |
2509 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2510 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2511 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2512 | * @full_table: ask for the entire translation table if true, while only for the |
2513 | * last TT diff otherwise | |
2514 | */ | |
56303d34 SE |
2515 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2516 | struct batadv_orig_node *dst_orig_node, | |
6b5e971a | 2517 | u8 ttvn, |
7ea7b4a1 | 2518 | struct batadv_tvlv_tt_vlan_data *tt_vlan, |
6b5e971a | 2519 | u16 num_vlan, bool full_table) |
a73105b8 | 2520 | { |
335fbe0f | 2521 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2522 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2523 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2524 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2525 | bool ret = false; |
7ea7b4a1 | 2526 | int i, size; |
a73105b8 | 2527 | |
e5d89254 | 2528 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2529 | if (!primary_if) |
2530 | goto out; | |
2531 | ||
2532 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2533 | * reply from the same orig_node yet |
2534 | */ | |
383b8636 | 2535 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
2536 | if (!tt_req_node) |
2537 | goto out; | |
2538 | ||
7ea7b4a1 AQ |
2539 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2540 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2541 | if (!tvlv_tt_data) |
a73105b8 AQ |
2542 | goto out; |
2543 | ||
335fbe0f ML |
2544 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2545 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2546 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2547 | ||
2548 | /* send all the CRCs within the request. This is needed by intermediate | |
2549 | * nodes to ensure they have the correct table before replying | |
2550 | */ | |
2551 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2552 | for (i = 0; i < num_vlan; i++) { | |
2553 | tt_vlan_req->vid = tt_vlan->vid; | |
2554 | tt_vlan_req->crc = tt_vlan->crc; | |
2555 | ||
2556 | tt_vlan_req++; | |
2557 | tt_vlan++; | |
2558 | } | |
a73105b8 AQ |
2559 | |
2560 | if (full_table) | |
335fbe0f | 2561 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2562 | |
bb351ba0 | 2563 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2564 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2565 | |
d69909d2 | 2566 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2567 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2568 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2569 | tvlv_tt_data, size); |
335fbe0f | 2570 | ret = true; |
a73105b8 AQ |
2571 | |
2572 | out: | |
a73105b8 | 2573 | if (primary_if) |
e5d89254 | 2574 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2575 | if (ret && tt_req_node) { |
807736f6 | 2576 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b ML |
2577 | /* hlist_del_init() verifies tt_req_node still is in the list */ |
2578 | hlist_del_init(&tt_req_node->list); | |
807736f6 | 2579 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2580 | kfree(tt_req_node); |
2581 | } | |
335fbe0f | 2582 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2583 | return ret; |
2584 | } | |
2585 | ||
335fbe0f ML |
2586 | /** |
2587 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2588 | * node's translation table | |
2589 | * @bat_priv: the bat priv with all the soft interface information | |
2590 | * @tt_data: tt data containing the tt request information | |
2591 | * @req_src: mac address of tt request sender | |
2592 | * @req_dst: mac address of tt request recipient | |
2593 | * | |
2594 | * Returns true if tt request reply was sent, false otherwise. | |
2595 | */ | |
2596 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2597 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2598 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2599 | { |
170173bf | 2600 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2601 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2602 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2603 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2604 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2605 | bool ret = false, full_table; |
6b5e971a SE |
2606 | u8 orig_ttvn, req_ttvn; |
2607 | u16 tvlv_len; | |
2608 | s32 tt_len; | |
a73105b8 | 2609 | |
39c75a51 | 2610 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2611 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 2612 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 2613 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
2614 | |
2615 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2616 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2617 | if (!req_dst_orig_node) |
2618 | goto out; | |
2619 | ||
335fbe0f | 2620 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2621 | if (!res_dst_orig_node) |
2622 | goto out; | |
2623 | ||
6b5e971a | 2624 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2625 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2626 | |
7ea7b4a1 | 2627 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2628 | /* this node doesn't have the requested data */ |
a73105b8 | 2629 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2630 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2631 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2632 | goto out; |
2633 | ||
015758d0 | 2634 | /* If the full table has been explicitly requested */ |
335fbe0f | 2635 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2636 | !req_dst_orig_node->tt_buff) |
2637 | full_table = true; | |
2638 | else | |
2639 | full_table = false; | |
2640 | ||
335fbe0f ML |
2641 | /* TT fragmentation hasn't been implemented yet, so send as many |
2642 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2643 | */ |
a73105b8 AQ |
2644 | if (!full_table) { |
2645 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2646 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2647 | |
7ea7b4a1 AQ |
2648 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2649 | &tvlv_tt_data, | |
2650 | &tt_change, | |
2651 | &tt_len); | |
2652 | if (!tt_len) | |
a73105b8 AQ |
2653 | goto unlock; |
2654 | ||
a73105b8 | 2655 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2656 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2657 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2658 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2659 | } else { | |
7ea7b4a1 AQ |
2660 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2661 | * in the initial part | |
2662 | */ | |
2663 | tt_len = -1; | |
2664 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2665 | &tvlv_tt_data, | |
2666 | &tt_change, | |
2667 | &tt_len); | |
2668 | if (!tt_len) | |
a73105b8 | 2669 | goto out; |
7ea7b4a1 AQ |
2670 | |
2671 | /* fill the rest of the tvlv with the real TT entries */ | |
2672 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2673 | tt_change, tt_len, | |
2674 | batadv_tt_global_valid, | |
2675 | req_dst_orig_node); | |
a73105b8 AQ |
2676 | } |
2677 | ||
a19d3d85 ML |
2678 | /* Don't send the response, if larger than fragmented packet. */ |
2679 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2680 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2681 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2682 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2683 | res_dst_orig_node->orig); | |
2684 | goto out; | |
2685 | } | |
2686 | ||
335fbe0f ML |
2687 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2688 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2689 | |
2690 | if (full_table) | |
335fbe0f | 2691 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2692 | |
39c75a51 | 2693 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2694 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2695 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2696 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2697 | |
d69909d2 | 2698 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2699 | |
335fbe0f | 2700 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2701 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2702 | tvlv_len); | |
e91ecfc6 | 2703 | |
335fbe0f | 2704 | ret = true; |
a73105b8 AQ |
2705 | goto out; |
2706 | ||
2707 | unlock: | |
2708 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2709 | ||
2710 | out: | |
2711 | if (res_dst_orig_node) | |
7d211efc | 2712 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2713 | if (req_dst_orig_node) |
7d211efc | 2714 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2715 | kfree(tvlv_tt_data); |
a73105b8 | 2716 | return ret; |
a73105b8 | 2717 | } |
96412690 | 2718 | |
335fbe0f ML |
2719 | /** |
2720 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2721 | * translation table | |
2722 | * @bat_priv: the bat priv with all the soft interface information | |
2723 | * @tt_data: tt data containing the tt request information | |
2724 | * @req_src: mac address of tt request sender | |
2725 | * | |
2726 | * Returns true if tt request reply was sent, false otherwise. | |
2727 | */ | |
2728 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2729 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2730 | u8 *req_src) |
a73105b8 | 2731 | { |
335fbe0f | 2732 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2733 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2734 | struct batadv_tvlv_tt_change *tt_change; |
2735 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
2736 | u8 my_ttvn, req_ttvn; |
2737 | u16 tvlv_len; | |
a73105b8 | 2738 | bool full_table; |
6b5e971a | 2739 | s32 tt_len; |
a73105b8 | 2740 | |
39c75a51 | 2741 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2742 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 2743 | req_src, tt_data->ttvn, |
a2f2b6cd | 2744 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2745 | |
a70a9aa9 | 2746 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2747 | |
6b5e971a | 2748 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2749 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2750 | |
335fbe0f | 2751 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2752 | if (!orig_node) |
2753 | goto out; | |
2754 | ||
e5d89254 | 2755 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2756 | if (!primary_if) |
2757 | goto out; | |
2758 | ||
2759 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2760 | * is too big send the whole local translation table |
2761 | */ | |
335fbe0f | 2762 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2763 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2764 | full_table = true; |
2765 | else | |
2766 | full_table = false; | |
2767 | ||
335fbe0f ML |
2768 | /* TT fragmentation hasn't been implemented yet, so send as many |
2769 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2770 | */ |
a73105b8 | 2771 | if (!full_table) { |
807736f6 | 2772 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2773 | |
7ea7b4a1 AQ |
2774 | tt_len = bat_priv->tt.last_changeset_len; |
2775 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2776 | &tvlv_tt_data, | |
2777 | &tt_change, | |
2778 | &tt_len); | |
2779 | if (!tt_len) | |
a73105b8 AQ |
2780 | goto unlock; |
2781 | ||
335fbe0f | 2782 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2783 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2784 | bat_priv->tt.last_changeset_len); |
2785 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2786 | } else { |
6b5e971a | 2787 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2788 | |
7ea7b4a1 AQ |
2789 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2790 | * in the initial part | |
2791 | */ | |
2792 | tt_len = -1; | |
2793 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2794 | &tvlv_tt_data, | |
2795 | &tt_change, | |
2796 | &tt_len); | |
2797 | if (!tt_len) | |
a73105b8 | 2798 | goto out; |
7ea7b4a1 AQ |
2799 | |
2800 | /* fill the rest of the tvlv with the real TT entries */ | |
2801 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2802 | tt_change, tt_len, | |
2803 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2804 | } |
2805 | ||
335fbe0f ML |
2806 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2807 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2808 | |
2809 | if (full_table) | |
335fbe0f | 2810 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2811 | |
39c75a51 | 2812 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2813 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2814 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2815 | |
d69909d2 | 2816 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2817 | |
335fbe0f | 2818 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2819 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2820 | tvlv_len); | |
335fbe0f | 2821 | |
a73105b8 AQ |
2822 | goto out; |
2823 | ||
2824 | unlock: | |
807736f6 | 2825 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2826 | out: |
a70a9aa9 | 2827 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2828 | if (orig_node) |
7d211efc | 2829 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2830 | if (primary_if) |
e5d89254 | 2831 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2832 | kfree(tvlv_tt_data); |
2833 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2834 | return true; |
2835 | } | |
2836 | ||
335fbe0f ML |
2837 | /** |
2838 | * batadv_send_tt_response - send reply to tt request | |
2839 | * @bat_priv: the bat priv with all the soft interface information | |
2840 | * @tt_data: tt data containing the tt request information | |
2841 | * @req_src: mac address of tt request sender | |
2842 | * @req_dst: mac address of tt request recipient | |
2843 | * | |
2844 | * Returns true if tt request reply was sent, false otherwise. | |
2845 | */ | |
2846 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2847 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2848 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2849 | { |
cfd4f757 | 2850 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2851 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
2852 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
2853 | req_dst); | |
a73105b8 AQ |
2854 | } |
2855 | ||
56303d34 SE |
2856 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2857 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2858 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 2859 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
2860 | { |
2861 | int i; | |
a513088d | 2862 | int roams; |
a73105b8 AQ |
2863 | |
2864 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2865 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2866 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2867 | batadv_tt_global_del(bat_priv, orig_node, |
2868 | (tt_change + i)->addr, | |
c018ad3d | 2869 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2870 | "tt removed by changes", |
2871 | roams); | |
08c36d3e | 2872 | } else { |
08c36d3e | 2873 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2874 | (tt_change + i)->addr, |
c018ad3d | 2875 | ntohs((tt_change + i)->vid), |
d4f44692 | 2876 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2877 | /* In case of problem while storing a |
2878 | * global_entry, we stop the updating | |
2879 | * procedure without committing the | |
2880 | * ttvn change. This will avoid to send | |
2881 | * corrupted data on tt_request | |
2882 | */ | |
2883 | return; | |
08c36d3e | 2884 | } |
a73105b8 | 2885 | } |
ac4eebd4 | 2886 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
2887 | } |
2888 | ||
56303d34 | 2889 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 2890 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
2891 | u8 ttvn, u8 *resp_src, |
2892 | u16 num_entries) | |
a73105b8 | 2893 | { |
170173bf | 2894 | struct batadv_orig_node *orig_node; |
a73105b8 | 2895 | |
335fbe0f | 2896 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2897 | if (!orig_node) |
2898 | goto out; | |
2899 | ||
2900 | /* Purge the old table first.. */ | |
95fb130d AQ |
2901 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2902 | "Received full table"); | |
a73105b8 | 2903 | |
7ea7b4a1 AQ |
2904 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2905 | ttvn); | |
a73105b8 AQ |
2906 | |
2907 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2908 | kfree(orig_node->tt_buff); | |
2909 | orig_node->tt_buff_len = 0; | |
2910 | orig_node->tt_buff = NULL; | |
2911 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2912 | ||
7ea7b4a1 | 2913 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2914 | |
2915 | out: | |
2916 | if (orig_node) | |
7d211efc | 2917 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2918 | } |
2919 | ||
56303d34 SE |
2920 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2921 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2922 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 2923 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2924 | { |
a513088d SE |
2925 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2926 | tt_num_changes, ttvn); | |
a73105b8 | 2927 | |
e8cf234a AQ |
2928 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2929 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2930 | atomic_set(&orig_node->last_ttvn, ttvn); |
2931 | } | |
2932 | ||
c018ad3d AQ |
2933 | /** |
2934 | * batadv_is_my_client - check if a client is served by the local node | |
2935 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 2936 | * @addr: the mac address of the client to check |
c018ad3d AQ |
2937 | * @vid: VLAN identifier |
2938 | * | |
2939 | * Returns true if the client is served by this node, false otherwise. | |
2940 | */ | |
6b5e971a | 2941 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 2942 | unsigned short vid) |
a73105b8 | 2943 | { |
170173bf | 2944 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2945 | bool ret = false; |
a73105b8 | 2946 | |
c018ad3d | 2947 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2948 | if (!tt_local_entry) |
2949 | goto out; | |
058d0e26 | 2950 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2951 | * consistency purpose) |
2952 | */ | |
7c1fd91d AQ |
2953 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2954 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2955 | goto out; |
7683fdc1 AQ |
2956 | ret = true; |
2957 | out: | |
a73105b8 | 2958 | if (tt_local_entry) |
a513088d | 2959 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2960 | return ret; |
a73105b8 AQ |
2961 | } |
2962 | ||
335fbe0f ML |
2963 | /** |
2964 | * batadv_handle_tt_response - process incoming tt reply | |
2965 | * @bat_priv: the bat priv with all the soft interface information | |
2966 | * @tt_data: tt data containing the tt request information | |
2967 | * @resp_src: mac address of tt reply sender | |
2968 | * @num_entries: number of tt change entries appended to the tt data | |
2969 | */ | |
2970 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2971 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2972 | u8 *resp_src, u16 num_entries) |
a73105b8 | 2973 | { |
7c26a53b ML |
2974 | struct batadv_tt_req_node *node; |
2975 | struct hlist_node *safe; | |
56303d34 | 2976 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 2977 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
2978 | u8 *tvlv_ptr = (u8 *)tt_data; |
2979 | u16 change_offset; | |
a73105b8 | 2980 | |
39c75a51 | 2981 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2982 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 2983 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 2984 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2985 | |
335fbe0f | 2986 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2987 | if (!orig_node) |
2988 | goto out; | |
2989 | ||
a70a9aa9 AQ |
2990 | spin_lock_bh(&orig_node->tt_lock); |
2991 | ||
7ea7b4a1 AQ |
2992 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2993 | change_offset *= ntohs(tt_data->num_vlan); | |
2994 | change_offset += sizeof(*tt_data); | |
2995 | tvlv_ptr += change_offset; | |
2996 | ||
2997 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2998 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2999 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3000 | resp_src, num_entries); | |
96412690 | 3001 | } else { |
335fbe0f ML |
3002 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3003 | tt_data->ttvn, tt_change); | |
96412690 | 3004 | } |
a73105b8 | 3005 | |
a70a9aa9 | 3006 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3007 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3008 | |
3009 | spin_unlock_bh(&orig_node->tt_lock); | |
3010 | ||
a73105b8 | 3011 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3012 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3013 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3014 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3015 | continue; |
7c26a53b | 3016 | hlist_del_init(&node->list); |
a73105b8 AQ |
3017 | kfree(node); |
3018 | } | |
7ea7b4a1 | 3019 | |
807736f6 | 3020 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3021 | out: |
3022 | if (orig_node) | |
7d211efc | 3023 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
3024 | } |
3025 | ||
56303d34 | 3026 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3027 | { |
56303d34 | 3028 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3029 | |
807736f6 | 3030 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3031 | |
807736f6 | 3032 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
3033 | list_del(&node->list); |
3034 | kfree(node); | |
3035 | } | |
3036 | ||
807736f6 | 3037 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3038 | } |
3039 | ||
56303d34 | 3040 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3041 | { |
56303d34 | 3042 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3043 | |
807736f6 SE |
3044 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3045 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3046 | if (!batadv_has_timed_out(node->first_time, |
3047 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3048 | continue; |
3049 | ||
3050 | list_del(&node->list); | |
3051 | kfree(node); | |
3052 | } | |
807736f6 | 3053 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3054 | } |
3055 | ||
3056 | /* This function checks whether the client already reached the | |
3057 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
3058 | * will not be sent. | |
3059 | * | |
9cfc7bd6 SE |
3060 | * returns true if the ROAMING_ADV can be sent, false otherwise |
3061 | */ | |
6b5e971a | 3062 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3063 | { |
56303d34 | 3064 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3065 | bool ret = false; |
3066 | ||
807736f6 | 3067 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3068 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3069 | * reply from the same orig_node yet |
3070 | */ | |
807736f6 | 3071 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3072 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3073 | continue; |
3074 | ||
1eda58bf | 3075 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3076 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3077 | continue; |
3078 | ||
3e34819e | 3079 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3080 | /* Sorry, you roamed too many times! */ |
3081 | goto unlock; | |
3082 | ret = true; | |
3083 | break; | |
3084 | } | |
3085 | ||
3086 | if (!ret) { | |
3087 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
3088 | if (!tt_roam_node) | |
3089 | goto unlock; | |
3090 | ||
3091 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3092 | atomic_set(&tt_roam_node->counter, |
3093 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3094 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3095 | |
807736f6 | 3096 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3097 | ret = true; |
3098 | } | |
3099 | ||
3100 | unlock: | |
807736f6 | 3101 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3102 | return ret; |
3103 | } | |
3104 | ||
c018ad3d AQ |
3105 | /** |
3106 | * batadv_send_roam_adv - send a roaming advertisement message | |
3107 | * @bat_priv: the bat priv with all the soft interface information | |
3108 | * @client: mac address of the roaming client | |
3109 | * @vid: VLAN identifier | |
3110 | * @orig_node: message destination | |
3111 | * | |
3112 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3113 | * client. This is done to inform the node that from now on all traffic destined | |
3114 | * for this particular roamed client has to be forwarded to the sender of the | |
3115 | * roaming message. | |
3116 | */ | |
6b5e971a | 3117 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3118 | unsigned short vid, |
56303d34 | 3119 | struct batadv_orig_node *orig_node) |
cc47f66e | 3120 | { |
56303d34 | 3121 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3122 | struct batadv_tvlv_roam_adv tvlv_roam; |
3123 | ||
3124 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3125 | if (!primary_if) | |
3126 | goto out; | |
cc47f66e AQ |
3127 | |
3128 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3129 | * already roamed to us too many times |
3130 | */ | |
a513088d | 3131 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3132 | goto out; |
3133 | ||
39c75a51 | 3134 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3135 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3136 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3137 | |
d69909d2 | 3138 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3139 | |
122edaa0 | 3140 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3141 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3142 | |
3143 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3144 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3145 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3146 | |
3147 | out: | |
122edaa0 ML |
3148 | if (primary_if) |
3149 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
3150 | } |
3151 | ||
a513088d | 3152 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3153 | { |
56303d34 | 3154 | struct delayed_work *delayed_work; |
807736f6 | 3155 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3156 | struct batadv_priv *bat_priv; |
3157 | ||
3158 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3159 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3160 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3161 | |
a19d3d85 | 3162 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3163 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3164 | batadv_tt_req_purge(bat_priv); |
3165 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3166 | |
72414442 AQ |
3167 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3168 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3169 | } |
cc47f66e | 3170 | |
56303d34 | 3171 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3172 | { |
e1bf0c14 ML |
3173 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3174 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3175 | ||
807736f6 | 3176 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3177 | |
a513088d SE |
3178 | batadv_tt_local_table_free(bat_priv); |
3179 | batadv_tt_global_table_free(bat_priv); | |
3180 | batadv_tt_req_list_free(bat_priv); | |
3181 | batadv_tt_changes_list_free(bat_priv); | |
3182 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3183 | |
807736f6 | 3184 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3185 | } |
058d0e26 | 3186 | |
7ea7b4a1 AQ |
3187 | /** |
3188 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3189 | * table and possibly count them in the TT size | |
3190 | * @bat_priv: the bat priv with all the soft interface information | |
3191 | * @flags: the flag to switch | |
3192 | * @enable: whether to set or unset the flag | |
3193 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3194 | */ |
6b5e971a SE |
3195 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3196 | bool enable, bool count) | |
058d0e26 | 3197 | { |
7ea7b4a1 AQ |
3198 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3199 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 3200 | u16 changed_num = 0; |
058d0e26 | 3201 | struct hlist_head *head; |
6b5e971a | 3202 | u32 i; |
058d0e26 AQ |
3203 | |
3204 | if (!hash) | |
7ea7b4a1 | 3205 | return; |
058d0e26 AQ |
3206 | |
3207 | for (i = 0; i < hash->size; i++) { | |
3208 | head = &hash->table[i]; | |
3209 | ||
3210 | rcu_read_lock(); | |
b67bfe0d | 3211 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3212 | head, hash_entry) { |
697f2531 AQ |
3213 | if (enable) { |
3214 | if ((tt_common_entry->flags & flags) == flags) | |
3215 | continue; | |
3216 | tt_common_entry->flags |= flags; | |
3217 | } else { | |
3218 | if (!(tt_common_entry->flags & flags)) | |
3219 | continue; | |
3220 | tt_common_entry->flags &= ~flags; | |
3221 | } | |
3222 | changed_num++; | |
7ea7b4a1 AQ |
3223 | |
3224 | if (!count) | |
3225 | continue; | |
3226 | ||
3227 | batadv_tt_local_size_inc(bat_priv, | |
3228 | tt_common_entry->vid); | |
058d0e26 AQ |
3229 | } |
3230 | rcu_read_unlock(); | |
3231 | } | |
058d0e26 AQ |
3232 | } |
3233 | ||
acd34afa | 3234 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3235 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3236 | { |
807736f6 | 3237 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3238 | struct batadv_tt_common_entry *tt_common; |
3239 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 3240 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 3241 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3242 | struct hlist_head *head; |
3243 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3244 | u32 i; |
058d0e26 AQ |
3245 | |
3246 | if (!hash) | |
3247 | return; | |
3248 | ||
3249 | for (i = 0; i < hash->size; i++) { | |
3250 | head = &hash->table[i]; | |
3251 | list_lock = &hash->list_locks[i]; | |
3252 | ||
3253 | spin_lock_bh(list_lock); | |
b67bfe0d | 3254 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3255 | hash_entry) { |
3256 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3257 | continue; |
3258 | ||
39c75a51 | 3259 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3260 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3261 | tt_common->addr, | |
3262 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3263 | |
7ea7b4a1 | 3264 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3265 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3266 | tt_local = container_of(tt_common, |
3267 | struct batadv_tt_local_entry, | |
3268 | common); | |
35df3b29 AQ |
3269 | |
3270 | /* decrease the reference held for this vlan */ | |
3271 | vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid); | |
354136bc ML |
3272 | if (vlan) { |
3273 | batadv_softif_vlan_free_ref(vlan); | |
3274 | batadv_softif_vlan_free_ref(vlan); | |
3275 | } | |
35df3b29 | 3276 | |
56303d34 | 3277 | batadv_tt_local_entry_free_ref(tt_local); |
058d0e26 AQ |
3278 | } |
3279 | spin_unlock_bh(list_lock); | |
3280 | } | |
058d0e26 AQ |
3281 | } |
3282 | ||
e1bf0c14 | 3283 | /** |
a19d3d85 ML |
3284 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3285 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3286 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3287 | * |
3288 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3289 | */ |
a19d3d85 | 3290 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3291 | { |
5274cd68 SE |
3292 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3293 | ||
c5caf4ef LL |
3294 | /* Update multicast addresses in local translation table */ |
3295 | batadv_mcast_mla_update(bat_priv); | |
3296 | ||
e1bf0c14 ML |
3297 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3298 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3299 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3300 | return; |
e1bf0c14 | 3301 | } |
be9aa4c1 | 3302 | |
7ea7b4a1 | 3303 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3304 | |
a513088d | 3305 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3306 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3307 | |
3308 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3309 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3310 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3311 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3312 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3313 | |
3314 | /* reset the sending counter */ | |
807736f6 | 3315 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3316 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3317 | } |
a70a9aa9 | 3318 | |
a19d3d85 ML |
3319 | /** |
3320 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3321 | * have been queued in the time since the last commit | |
3322 | * @bat_priv: the bat priv with all the soft interface information | |
3323 | */ | |
3324 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3325 | { | |
3326 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3327 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3328 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3329 | } |
59b699cd | 3330 | |
6b5e971a SE |
3331 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3332 | unsigned short vid) | |
59b699cd | 3333 | { |
56303d34 SE |
3334 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3335 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3336 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3337 | bool ret = false; |
59b699cd | 3338 | |
b8cbd81d | 3339 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3340 | if (!vlan) |
3341 | return false; | |
3342 | ||
3343 | if (!atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3344 | goto out; |
59b699cd | 3345 | |
b8cbd81d | 3346 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3347 | if (!tt_local_entry) |
3348 | goto out; | |
3349 | ||
b8cbd81d | 3350 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3351 | if (!tt_global_entry) |
3352 | goto out; | |
3353 | ||
1f129fef | 3354 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3355 | goto out; |
3356 | ||
5870adc6 | 3357 | ret = true; |
59b699cd AQ |
3358 | |
3359 | out: | |
f75a33ae | 3360 | batadv_softif_vlan_free_ref(vlan); |
59b699cd | 3361 | if (tt_global_entry) |
a513088d | 3362 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3363 | if (tt_local_entry) |
a513088d | 3364 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3365 | return ret; |
3366 | } | |
a943cac1 | 3367 | |
e1bf0c14 ML |
3368 | /** |
3369 | * batadv_tt_update_orig - update global translation table with new tt | |
3370 | * information received via ogms | |
3371 | * @bat_priv: the bat priv with all the soft interface information | |
3372 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3373 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3374 | * @tt_num_vlan: number of tvlv VLAN entries | |
3375 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3376 | * @tt_num_changes: number of tt changes inside the tt buffer |
3377 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3378 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3379 | */ |
3380 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3381 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3382 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3383 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3384 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3385 | { |
6b5e971a | 3386 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3387 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3388 | bool full_table = true; |
e17931d1 | 3389 | bool has_tt_init; |
a943cac1 | 3390 | |
7ea7b4a1 | 3391 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3392 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3393 | &orig_node->capa_initialized); | |
e17931d1 | 3394 | |
17071578 | 3395 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3396 | * increased by one -> we can apply the attached changes |
3397 | */ | |
e17931d1 | 3398 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3399 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3400 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3401 | * times. | |
9cfc7bd6 SE |
3402 | * In this case send a tt request |
3403 | */ | |
a943cac1 ML |
3404 | if (!tt_num_changes) { |
3405 | full_table = false; | |
3406 | goto request_table; | |
3407 | } | |
3408 | ||
a70a9aa9 AQ |
3409 | spin_lock_bh(&orig_node->tt_lock); |
3410 | ||
a513088d | 3411 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3412 | ttvn, tt_change); |
a943cac1 ML |
3413 | |
3414 | /* Even if we received the precomputed crc with the OGM, we | |
3415 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3416 | * in the global table |
3417 | */ | |
7ea7b4a1 | 3418 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3419 | |
a70a9aa9 AQ |
3420 | spin_unlock_bh(&orig_node->tt_lock); |
3421 | ||
a943cac1 ML |
3422 | /* The ttvn alone is not enough to guarantee consistency |
3423 | * because a single value could represent different states | |
3424 | * (due to the wrap around). Thus a node has to check whether | |
3425 | * the resulting table (after applying the changes) is still | |
3426 | * consistent or not. E.g. a node could disconnect while its | |
3427 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3428 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3429 | * inconsistency |
3430 | */ | |
7ea7b4a1 AQ |
3431 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3432 | tt_num_vlan)) | |
a943cac1 | 3433 | goto request_table; |
a943cac1 ML |
3434 | } else { |
3435 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3436 | * in sync anymore -> request fresh tt data |
3437 | */ | |
e17931d1 | 3438 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3439 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3440 | tt_num_vlan)) { | |
a943cac1 | 3441 | request_table: |
39c75a51 | 3442 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3443 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3444 | orig_node->orig, ttvn, orig_ttvn, | |
3445 | tt_num_changes); | |
a513088d | 3446 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3447 | tt_vlan, tt_num_vlan, |
3448 | full_table); | |
a943cac1 ML |
3449 | return; |
3450 | } | |
3451 | } | |
3452 | } | |
3275e7cc | 3453 | |
c018ad3d AQ |
3454 | /** |
3455 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3456 | * @bat_priv: the bat priv with all the soft interface information | |
3457 | * @addr: the mac address of the client to check | |
3458 | * @vid: VLAN identifier | |
3459 | * | |
3460 | * Returns true if we know that the client has moved from its old originator | |
3461 | * to another one. This entry is still kept for consistency purposes and will be | |
3462 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3463 | */ |
56303d34 | 3464 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 3465 | u8 *addr, unsigned short vid) |
3275e7cc | 3466 | { |
56303d34 | 3467 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3468 | bool ret = false; |
3469 | ||
c018ad3d | 3470 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3471 | if (!tt_global_entry) |
3472 | goto out; | |
3473 | ||
c1d07431 | 3474 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3475 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3476 | out: |
3477 | return ret; | |
3478 | } | |
30cfd02b | 3479 | |
7c1fd91d AQ |
3480 | /** |
3481 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3482 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3483 | * @addr: the mac address of the local client to query |
3484 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3485 | * |
3486 | * Returns true if the local client is known to be roaming (it is not served by | |
3487 | * this node anymore) or not. If yes, the client is still present in the table | |
3488 | * to keep the latter consistent with the node TTVN | |
3489 | */ | |
3490 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 3491 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
3492 | { |
3493 | struct batadv_tt_local_entry *tt_local_entry; | |
3494 | bool ret = false; | |
3495 | ||
c018ad3d | 3496 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3497 | if (!tt_local_entry) |
3498 | goto out; | |
3499 | ||
3500 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3501 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3502 | out: | |
3503 | return ret; | |
7c1fd91d AQ |
3504 | } |
3505 | ||
30cfd02b AQ |
3506 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3507 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3508 | const unsigned char *addr, |
16052789 | 3509 | unsigned short vid) |
30cfd02b AQ |
3510 | { |
3511 | bool ret = false; | |
3512 | ||
16052789 | 3513 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3514 | BATADV_TT_CLIENT_TEMP, |
3515 | atomic_read(&orig_node->last_ttvn))) | |
3516 | goto out; | |
3517 | ||
3518 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3519 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3520 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3521 | ret = true; |
3522 | out: | |
3523 | return ret; | |
3524 | } | |
e1bf0c14 | 3525 | |
a19d3d85 ML |
3526 | /** |
3527 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3528 | * maximum packet size that can be transported through the mesh | |
3529 | * @soft_iface: netdev struct of the mesh interface | |
3530 | * | |
3531 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3532 | * to be removed. | |
3533 | */ | |
3534 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3535 | { | |
3536 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3537 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3538 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3539 | bool reduced = false; | |
3540 | ||
3541 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3542 | ||
3543 | while (true) { | |
3544 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3545 | if (packet_size_max >= table_size) | |
3546 | break; | |
3547 | ||
3548 | batadv_tt_local_purge(bat_priv, timeout); | |
3549 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3550 | ||
3551 | timeout /= 2; | |
3552 | reduced = true; | |
3553 | net_ratelimited_function(batadv_info, soft_iface, | |
3554 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3555 | packet_size_max); | |
3556 | } | |
3557 | ||
3558 | /* commit these changes immediately, to avoid synchronization problem | |
3559 | * with the TTVN | |
3560 | */ | |
3561 | if (reduced) | |
3562 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3563 | ||
3564 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3565 | } | |
3566 | ||
e1bf0c14 ML |
3567 | /** |
3568 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3569 | * @bat_priv: the bat priv with all the soft interface information | |
3570 | * @orig: the orig_node of the ogm | |
3571 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3572 | * @tvlv_value: tvlv buffer containing the gateway data | |
3573 | * @tvlv_value_len: tvlv buffer length | |
3574 | */ | |
3575 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3576 | struct batadv_orig_node *orig, | |
6b5e971a SE |
3577 | u8 flags, void *tvlv_value, |
3578 | u16 tvlv_value_len) | |
e1bf0c14 | 3579 | { |
7ea7b4a1 AQ |
3580 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3581 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3582 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 3583 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
3584 | |
3585 | if (tvlv_value_len < sizeof(*tt_data)) | |
3586 | return; | |
3587 | ||
3588 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3589 | tvlv_value_len -= sizeof(*tt_data); | |
3590 | ||
7ea7b4a1 AQ |
3591 | num_vlan = ntohs(tt_data->num_vlan); |
3592 | ||
3593 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3594 | return; | |
3595 | ||
3596 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3597 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3598 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3599 | ||
298e6e68 | 3600 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3601 | |
7ea7b4a1 AQ |
3602 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3603 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3604 | } |
3605 | ||
335fbe0f ML |
3606 | /** |
3607 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3608 | * container | |
3609 | * @bat_priv: the bat priv with all the soft interface information | |
3610 | * @src: mac address of tt tvlv sender | |
3611 | * @dst: mac address of tt tvlv recipient | |
3612 | * @tvlv_value: tvlv buffer containing the tt data | |
3613 | * @tvlv_value_len: tvlv buffer length | |
3614 | * | |
3615 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3616 | * otherwise. | |
3617 | */ | |
3618 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3619 | u8 *src, u8 *dst, |
335fbe0f | 3620 | void *tvlv_value, |
6b5e971a | 3621 | u16 tvlv_value_len) |
335fbe0f ML |
3622 | { |
3623 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 3624 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3625 | char tt_flag; |
3626 | bool ret; | |
3627 | ||
3628 | if (tvlv_value_len < sizeof(*tt_data)) | |
3629 | return NET_RX_SUCCESS; | |
3630 | ||
3631 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3632 | tvlv_value_len -= sizeof(*tt_data); | |
3633 | ||
7ea7b4a1 AQ |
3634 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3635 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3636 | ||
3637 | if (tvlv_value_len < tt_vlan_len) | |
3638 | return NET_RX_SUCCESS; | |
3639 | ||
3640 | tvlv_value_len -= tt_vlan_len; | |
3641 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3642 | |
3643 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3644 | case BATADV_TT_REQUEST: | |
3645 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3646 | ||
3647 | /* If this node cannot provide a TT response the tt_request is | |
3648 | * forwarded | |
3649 | */ | |
3650 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3651 | if (!ret) { | |
3652 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3653 | tt_flag = 'F'; | |
3654 | else | |
3655 | tt_flag = '.'; | |
3656 | ||
3657 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3658 | "Routing TT_REQUEST to %pM [%c]\n", | |
3659 | dst, tt_flag); | |
3660 | /* tvlv API will re-route the packet */ | |
3661 | return NET_RX_DROP; | |
3662 | } | |
3663 | break; | |
3664 | case BATADV_TT_RESPONSE: | |
3665 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3666 | ||
3667 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3668 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3669 | src, tt_num_entries); |
335fbe0f ML |
3670 | return NET_RX_SUCCESS; |
3671 | } | |
3672 | ||
3673 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3674 | tt_flag = 'F'; | |
3675 | else | |
3676 | tt_flag = '.'; | |
3677 | ||
3678 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3679 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3680 | ||
3681 | /* tvlv API will re-route the packet */ | |
3682 | return NET_RX_DROP; | |
3683 | } | |
3684 | ||
3685 | return NET_RX_SUCCESS; | |
3686 | } | |
3687 | ||
122edaa0 ML |
3688 | /** |
3689 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3690 | * @bat_priv: the bat priv with all the soft interface information | |
3691 | * @src: mac address of tt tvlv sender | |
3692 | * @dst: mac address of tt tvlv recipient | |
3693 | * @tvlv_value: tvlv buffer containing the tt data | |
3694 | * @tvlv_value_len: tvlv buffer length | |
3695 | * | |
3696 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3697 | * otherwise. | |
3698 | */ | |
3699 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3700 | u8 *src, u8 *dst, |
122edaa0 | 3701 | void *tvlv_value, |
6b5e971a | 3702 | u16 tvlv_value_len) |
122edaa0 ML |
3703 | { |
3704 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3705 | struct batadv_orig_node *orig_node = NULL; | |
3706 | ||
3707 | /* If this node is not the intended recipient of the | |
3708 | * roaming advertisement the packet is forwarded | |
3709 | * (the tvlv API will re-route the packet). | |
3710 | */ | |
3711 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3712 | return NET_RX_DROP; | |
3713 | ||
122edaa0 ML |
3714 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3715 | goto out; | |
3716 | ||
3717 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3718 | if (!orig_node) | |
3719 | goto out; | |
3720 | ||
3721 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3722 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3723 | ||
3724 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3725 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3726 | src, roaming_adv->client); | |
3727 | ||
3728 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3729 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3730 | atomic_read(&orig_node->last_ttvn) + 1); |
3731 | ||
3732 | out: | |
3733 | if (orig_node) | |
3734 | batadv_orig_node_free_ref(orig_node); | |
3735 | return NET_RX_SUCCESS; | |
3736 | } | |
3737 | ||
e1bf0c14 ML |
3738 | /** |
3739 | * batadv_tt_init - initialise the translation table internals | |
3740 | * @bat_priv: the bat priv with all the soft interface information | |
3741 | * | |
3742 | * Return 0 on success or negative error number in case of failure. | |
3743 | */ | |
3744 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3745 | { | |
3746 | int ret; | |
3747 | ||
0eb01568 AQ |
3748 | /* synchronized flags must be remote */ |
3749 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3750 | ||
e1bf0c14 ML |
3751 | ret = batadv_tt_local_init(bat_priv); |
3752 | if (ret < 0) | |
3753 | return ret; | |
3754 | ||
3755 | ret = batadv_tt_global_init(bat_priv); | |
3756 | if (ret < 0) | |
3757 | return ret; | |
3758 | ||
3759 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3760 | batadv_tt_tvlv_unicast_handler_v1, |
3761 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3762 | |
122edaa0 ML |
3763 | batadv_tvlv_handler_register(bat_priv, NULL, |
3764 | batadv_roam_tvlv_unicast_handler_v1, | |
3765 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3766 | ||
e1bf0c14 ML |
3767 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3768 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3769 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3770 | ||
3771 | return 1; | |
3772 | } | |
42cb0bef AQ |
3773 | |
3774 | /** | |
3775 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3776 | * @bat_priv: the bat priv with all the soft interface information | |
3777 | * @addr: the mac address of the client | |
3778 | * @vid: the identifier of the VLAN where this client is connected | |
3779 | * | |
3780 | * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false | |
3781 | * otherwise | |
3782 | */ | |
3783 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 3784 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
3785 | { |
3786 | struct batadv_tt_global_entry *tt; | |
3787 | bool ret; | |
3788 | ||
3789 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3790 | if (!tt) | |
3791 | return false; | |
3792 | ||
3793 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3794 | ||
3795 | batadv_tt_global_entry_free_ref(tt); | |
3796 | ||
3797 | return ret; | |
3798 | } |