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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 | |
62fe710f SE |
71 | /** |
72 | * batadv_compare_tt | |
73 | * | |
74 | * Return: 1 if they are the same mac addr and vid | |
75 | */ | |
a513088d | 76 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 77 | { |
56303d34 | 78 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 79 | hash_entry); |
4c718958 ML |
80 | const struct batadv_tt_common_entry *tt1 = data1; |
81 | const struct batadv_tt_common_entry *tt2 = data2; | |
7aadf889 | 82 | |
4c718958 | 83 | return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2); |
7aadf889 ML |
84 | } |
85 | ||
c018ad3d AQ |
86 | /** |
87 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
88 | * @data: pointer to the tt_common_entry object to map | |
89 | * @size: the size of the hash table | |
90 | * | |
62fe710f | 91 | * Return: the hash index where the object represented by 'data' should be |
c018ad3d AQ |
92 | * stored at. |
93 | */ | |
6b5e971a | 94 | static inline u32 batadv_choose_tt(const void *data, u32 size) |
c018ad3d AQ |
95 | { |
96 | struct batadv_tt_common_entry *tt; | |
6b5e971a | 97 | u32 hash = 0; |
c018ad3d AQ |
98 | |
99 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
100 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
101 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
102 | |
103 | return hash % size; | |
104 | } | |
105 | ||
106 | /** | |
107 | * batadv_tt_hash_find - look for a client in the given hash table | |
108 | * @hash: the hash table to search | |
109 | * @addr: the mac address of the client to look for | |
110 | * @vid: VLAN identifier | |
111 | * | |
62fe710f | 112 | * Return: a pointer to the tt_common struct belonging to the searched client if |
c018ad3d AQ |
113 | * found, NULL otherwise. |
114 | */ | |
56303d34 | 115 | static struct batadv_tt_common_entry * |
6b5e971a | 116 | batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr, |
c018ad3d | 117 | unsigned short vid) |
7aadf889 | 118 | { |
7aadf889 | 119 | struct hlist_head *head; |
c018ad3d | 120 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
6b5e971a | 121 | u32 index; |
7aadf889 ML |
122 | |
123 | if (!hash) | |
124 | return NULL; | |
125 | ||
8fdd0153 | 126 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
127 | to_search.vid = vid; |
128 | ||
129 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
130 | head = &hash->table[index]; |
131 | ||
132 | rcu_read_lock(); | |
c018ad3d AQ |
133 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
134 | if (!batadv_compare_eth(tt, addr)) | |
135 | continue; | |
136 | ||
137 | if (tt->vid != vid) | |
7aadf889 ML |
138 | continue; |
139 | ||
c018ad3d | 140 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
141 | continue; |
142 | ||
c018ad3d | 143 | tt_tmp = tt; |
7aadf889 ML |
144 | break; |
145 | } | |
146 | rcu_read_unlock(); | |
147 | ||
c018ad3d | 148 | return tt_tmp; |
7aadf889 ML |
149 | } |
150 | ||
c018ad3d AQ |
151 | /** |
152 | * batadv_tt_local_hash_find - search the local table for a given client | |
153 | * @bat_priv: the bat priv with all the soft interface information | |
154 | * @addr: the mac address of the client to look for | |
155 | * @vid: VLAN identifier | |
156 | * | |
62fe710f | 157 | * Return: a pointer to the corresponding tt_local_entry struct if the client is |
c018ad3d AQ |
158 | * found, NULL otherwise. |
159 | */ | |
56303d34 | 160 | static struct batadv_tt_local_entry * |
6b5e971a | 161 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 162 | unsigned short vid) |
7aadf889 | 163 | { |
56303d34 SE |
164 | struct batadv_tt_common_entry *tt_common_entry; |
165 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 166 | |
c018ad3d AQ |
167 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
168 | vid); | |
48100bac AQ |
169 | if (tt_common_entry) |
170 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
171 | struct batadv_tt_local_entry, |
172 | common); | |
48100bac AQ |
173 | return tt_local_entry; |
174 | } | |
7aadf889 | 175 | |
c018ad3d AQ |
176 | /** |
177 | * batadv_tt_global_hash_find - search the global table for a given client | |
178 | * @bat_priv: the bat priv with all the soft interface information | |
179 | * @addr: the mac address of the client to look for | |
180 | * @vid: VLAN identifier | |
181 | * | |
62fe710f | 182 | * Return: a pointer to the corresponding tt_global_entry struct if the client |
c018ad3d AQ |
183 | * is found, NULL otherwise. |
184 | */ | |
56303d34 | 185 | static struct batadv_tt_global_entry * |
6b5e971a | 186 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 187 | unsigned short vid) |
48100bac | 188 | { |
56303d34 SE |
189 | struct batadv_tt_common_entry *tt_common_entry; |
190 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 191 | |
c018ad3d AQ |
192 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
193 | vid); | |
48100bac AQ |
194 | if (tt_common_entry) |
195 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
196 | struct batadv_tt_global_entry, |
197 | common); | |
48100bac | 198 | return tt_global_entry; |
7aadf889 ML |
199 | } |
200 | ||
a513088d | 201 | static void |
56303d34 | 202 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 203 | { |
48100bac AQ |
204 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
205 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
206 | } |
207 | ||
21026059 AQ |
208 | /** |
209 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
210 | * tt_global_entry and possibly free it | |
211 | * @tt_global_entry: the object to free | |
212 | */ | |
a513088d | 213 | static void |
56303d34 | 214 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 215 | { |
db08e6e5 | 216 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 217 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 218 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
219 | } |
220 | } | |
221 | ||
1d8ab8d3 LL |
222 | /** |
223 | * batadv_tt_global_hash_count - count the number of orig entries | |
1d8ab8d3 LL |
224 | * @addr: the mac address of the client to count entries for |
225 | * @vid: VLAN identifier | |
226 | * | |
62fe710f | 227 | * Return: the number of originators advertising the given address/data |
1d8ab8d3 LL |
228 | * (excluding ourself). |
229 | */ | |
230 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 231 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
232 | { |
233 | struct batadv_tt_global_entry *tt_global_entry; | |
234 | int count; | |
235 | ||
236 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
237 | if (!tt_global_entry) | |
238 | return 0; | |
239 | ||
240 | count = atomic_read(&tt_global_entry->orig_list_count); | |
241 | batadv_tt_global_entry_free_ref(tt_global_entry); | |
242 | ||
243 | return count; | |
244 | } | |
245 | ||
7ea7b4a1 AQ |
246 | /** |
247 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
248 | * by vid | |
249 | * @bat_priv: the bat priv with all the soft interface information | |
250 | * @vid: the VLAN identifier of the sub-table to change | |
251 | * @v: the amount to sum to the local table size | |
252 | */ | |
253 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
254 | unsigned short vid, int v) | |
255 | { | |
256 | struct batadv_softif_vlan *vlan; | |
257 | ||
258 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
259 | if (!vlan) | |
260 | return; | |
261 | ||
262 | atomic_add(v, &vlan->tt.num_entries); | |
263 | ||
264 | batadv_softif_vlan_free_ref(vlan); | |
265 | } | |
266 | ||
267 | /** | |
268 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
269 | * vid | |
270 | * @bat_priv: the bat priv with all the soft interface information | |
271 | * @vid: the VLAN identifier | |
272 | */ | |
273 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
274 | unsigned short vid) | |
275 | { | |
276 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
277 | } | |
278 | ||
279 | /** | |
280 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
281 | * vid | |
282 | * @bat_priv: the bat priv with all the soft interface information | |
283 | * @vid: the VLAN identifier | |
284 | */ | |
285 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
286 | unsigned short vid) | |
287 | { | |
288 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
289 | } | |
290 | ||
291 | /** | |
292 | * batadv_tt_global_size_mod - change the size by v of the local table | |
293 | * identified by vid | |
7ea7b4a1 AQ |
294 | * @vid: the VLAN identifier |
295 | * @v: the amount to sum to the global table size | |
296 | */ | |
297 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
298 | unsigned short vid, int v) | |
299 | { | |
300 | struct batadv_orig_node_vlan *vlan; | |
301 | ||
302 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
303 | if (!vlan) | |
304 | return; | |
305 | ||
306 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
307 | spin_lock_bh(&orig_node->vlan_list_lock); | |
a121048a | 308 | hlist_del_init_rcu(&vlan->list); |
7ea7b4a1 AQ |
309 | spin_unlock_bh(&orig_node->vlan_list_lock); |
310 | batadv_orig_node_vlan_free_ref(vlan); | |
311 | } | |
312 | ||
313 | batadv_orig_node_vlan_free_ref(vlan); | |
314 | } | |
315 | ||
316 | /** | |
317 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
318 | * given vid | |
319 | * @orig_node: the originator which global table size has to be decreased | |
320 | * @vid: the vlan identifier | |
321 | */ | |
322 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
323 | unsigned short vid) | |
324 | { | |
325 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
326 | } | |
327 | ||
328 | /** | |
329 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
330 | * given vid | |
331 | * @orig_node: the originator which global table size has to be decreased | |
332 | * @vid: the vlan identifier | |
333 | */ | |
334 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
335 | unsigned short vid) | |
336 | { | |
337 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
338 | } | |
339 | ||
42eff6a6 SE |
340 | /** |
341 | * batadv_tt_orig_list_entry_release - release tt orig entry from lists and | |
342 | * queue for free after rcu grace period | |
343 | * @orig_entry: tt orig entry to be free'd | |
344 | */ | |
345 | static void | |
346 | batadv_tt_orig_list_entry_release(struct batadv_tt_orig_list_entry *orig_entry) | |
347 | { | |
348 | batadv_orig_node_free_ref(orig_entry->orig_node); | |
349 | kfree_rcu(orig_entry, rcu); | |
350 | } | |
351 | ||
a513088d | 352 | static void |
56303d34 | 353 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 354 | { |
d657e621 AQ |
355 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
356 | return; | |
7ea7b4a1 | 357 | |
42eff6a6 | 358 | batadv_tt_orig_list_entry_release(orig_entry); |
7683fdc1 AQ |
359 | } |
360 | ||
3abe4adb AQ |
361 | /** |
362 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
363 | * @bat_priv: the bat priv with all the soft interface information | |
364 | * @tt_local_entry: the TT entry involved in the event | |
365 | * @event_flags: flags to store in the event structure | |
366 | */ | |
56303d34 | 367 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 368 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 369 | u8 event_flags) |
a73105b8 | 370 | { |
56303d34 | 371 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 372 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 373 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
374 | bool event_removed = false; |
375 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
376 | |
377 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
378 | if (!tt_change_node) |
379 | return; | |
380 | ||
ff66c975 | 381 | tt_change_node->change.flags = flags; |
ca663046 AQ |
382 | memset(tt_change_node->change.reserved, 0, |
383 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 384 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 385 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 386 | |
acd34afa | 387 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
388 | |
389 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
390 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
391 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 392 | list) { |
3abe4adb | 393 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
394 | continue; |
395 | ||
396 | /* DEL+ADD in the same orig interval have no effect and can be | |
397 | * removed to avoid silly behaviour on the receiver side. The | |
398 | * other way around (ADD+DEL) can happen in case of roaming of | |
399 | * a client still in the NEW state. Roaming of NEW clients is | |
400 | * now possible due to automatically recognition of "temporary" | |
401 | * clients | |
402 | */ | |
acd34afa | 403 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
404 | if (!del_op_requested && del_op_entry) |
405 | goto del; | |
406 | if (del_op_requested && !del_op_entry) | |
407 | goto del; | |
3c4f7ab6 AQ |
408 | |
409 | /* this is a second add in the same originator interval. It | |
410 | * means that flags have been changed: update them! | |
411 | */ | |
412 | if (!del_op_requested && !del_op_entry) | |
413 | entry->change.flags = flags; | |
414 | ||
3b643de5 AQ |
415 | continue; |
416 | del: | |
417 | list_del(&entry->list); | |
418 | kfree(entry); | |
155e4e12 | 419 | kfree(tt_change_node); |
3b643de5 AQ |
420 | event_removed = true; |
421 | goto unlock; | |
422 | } | |
423 | ||
a73105b8 | 424 | /* track the change in the OGMinterval list */ |
807736f6 | 425 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
426 | |
427 | unlock: | |
807736f6 | 428 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 429 | |
3b643de5 | 430 | if (event_removed) |
807736f6 | 431 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 432 | else |
807736f6 | 433 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
434 | } |
435 | ||
335fbe0f ML |
436 | /** |
437 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
438 | * @changes_num: number of tt changes | |
439 | * | |
62fe710f | 440 | * Return: computed length in bytes. |
335fbe0f ML |
441 | */ |
442 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 443 | { |
335fbe0f | 444 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
445 | } |
446 | ||
298e6e68 AQ |
447 | /** |
448 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
449 | * @tt_len: available space | |
450 | * | |
62fe710f | 451 | * Return: the number of entries. |
298e6e68 | 452 | */ |
6b5e971a | 453 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
454 | { |
455 | return tt_len / batadv_tt_len(1); | |
456 | } | |
457 | ||
a19d3d85 ML |
458 | /** |
459 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
460 | * size when transmitted over the air | |
461 | * @bat_priv: the bat priv with all the soft interface information | |
462 | * | |
62fe710f | 463 | * Return: local translation table size in bytes. |
a19d3d85 ML |
464 | */ |
465 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
466 | { | |
4f248cff SE |
467 | u16 num_vlan = 0; |
468 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
469 | struct batadv_softif_vlan *vlan; |
470 | int hdr_size; | |
471 | ||
472 | rcu_read_lock(); | |
473 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
474 | num_vlan++; | |
475 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
476 | } | |
477 | rcu_read_unlock(); | |
478 | ||
479 | /* header size of tvlv encapsulated tt response payload */ | |
480 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
481 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
482 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
483 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
484 | ||
485 | return hdr_size + batadv_tt_len(tt_local_entries); | |
486 | } | |
487 | ||
56303d34 | 488 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 489 | { |
807736f6 | 490 | if (bat_priv->tt.local_hash) |
5346c35e | 491 | return 0; |
c6c8fea2 | 492 | |
807736f6 | 493 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 494 | |
807736f6 | 495 | if (!bat_priv->tt.local_hash) |
5346c35e | 496 | return -ENOMEM; |
c6c8fea2 | 497 | |
dec05074 AQ |
498 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
499 | &batadv_tt_local_hash_lock_class_key); | |
500 | ||
5346c35e | 501 | return 0; |
c6c8fea2 SE |
502 | } |
503 | ||
068ee6e2 AQ |
504 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
505 | struct batadv_tt_global_entry *tt_global, | |
506 | const char *message) | |
507 | { | |
508 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
509 | "Deleting global tt entry %pM (vid: %d): %s\n", |
510 | tt_global->common.addr, | |
511 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
512 | |
513 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 514 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 515 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
516 | } |
517 | ||
c018ad3d AQ |
518 | /** |
519 | * batadv_tt_local_add - add a new client to the local table or update an | |
520 | * existing client | |
521 | * @soft_iface: netdev struct of the mesh interface | |
522 | * @addr: the mac address of the client to add | |
523 | * @vid: VLAN identifier | |
524 | * @ifindex: index of the interface where the client is connected to (useful to | |
525 | * identify wireless clients) | |
9464d071 AQ |
526 | * @mark: the value contained in the skb->mark field of the received packet (if |
527 | * any) | |
a19d3d85 | 528 | * |
62fe710f | 529 | * Return: true if the client was successfully added, false otherwise. |
c018ad3d | 530 | */ |
6b5e971a SE |
531 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
532 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 533 | { |
56303d34 | 534 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 535 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 536 | struct batadv_tt_global_entry *tt_global = NULL; |
35df3b29 | 537 | struct batadv_softif_vlan *vlan; |
0c69aecc | 538 | struct net_device *in_dev = NULL; |
db08e6e5 | 539 | struct hlist_head *head; |
56303d34 | 540 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 541 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
542 | bool ret = false; |
543 | bool roamed_back = false; | |
6b5e971a SE |
544 | u8 remote_flags; |
545 | u32 match_mark; | |
c6c8fea2 | 546 | |
0c69aecc AQ |
547 | if (ifindex != BATADV_NULL_IFINDEX) |
548 | in_dev = dev_get_by_index(&init_net, ifindex); | |
549 | ||
c018ad3d | 550 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
551 | |
552 | if (!is_multicast_ether_addr(addr)) | |
553 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 554 | |
47c94655 AQ |
555 | if (tt_local) { |
556 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
557 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
558 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
559 | "Re-adding pending client %pM (vid: %d)\n", |
560 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
561 | /* whatever the reason why the PENDING flag was set, |
562 | * this is a client which was enqueued to be removed in | |
563 | * this orig_interval. Since it popped up again, the | |
564 | * flag can be reset like it was never enqueued | |
565 | */ | |
566 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
567 | goto add_event; | |
568 | } | |
569 | ||
570 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
571 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
572 | "Roaming client %pM (vid: %d) came back to its original location\n", |
573 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
574 | /* the ROAM flag is set because this client roamed away |
575 | * and the node got a roaming_advertisement message. Now | |
576 | * that the client popped up again at its original | |
577 | * location such flag can be unset | |
578 | */ | |
579 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
580 | roamed_back = true; | |
581 | } | |
582 | goto check_roaming; | |
c6c8fea2 SE |
583 | } |
584 | ||
a19d3d85 ML |
585 | /* Ignore the client if we cannot send it in a full table response. */ |
586 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
587 | table_size += batadv_tt_len(1); | |
588 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
589 | if (table_size > packet_size_max) { | |
590 | net_ratelimited_function(batadv_info, soft_iface, | |
591 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
592 | table_size, packet_size_max, addr); | |
593 | goto out; | |
594 | } | |
595 | ||
47c94655 AQ |
596 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
597 | if (!tt_local) | |
7683fdc1 | 598 | goto out; |
a73105b8 | 599 | |
35df3b29 AQ |
600 | /* increase the refcounter of the related vlan */ |
601 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc | 602 | if (WARN(!vlan, "adding TT local entry %pM to non-existent VLAN %d", |
fd7dec25 SE |
603 | addr, BATADV_PRINT_VID(vid))) { |
604 | kfree(tt_local); | |
605 | tt_local = NULL; | |
354136bc | 606 | goto out; |
fd7dec25 | 607 | } |
35df3b29 | 608 | |
39c75a51 | 609 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
610 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
611 | addr, BATADV_PRINT_VID(vid), | |
6b5e971a | 612 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 613 | |
8fdd0153 | 614 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
615 | /* The local entry has to be marked as NEW to avoid to send it in |
616 | * a full table response going out before the next ttvn increment | |
617 | * (consistency check) | |
618 | */ | |
619 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 620 | tt_local->common.vid = vid; |
0c69aecc | 621 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
622 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
623 | atomic_set(&tt_local->common.refcount, 2); | |
624 | tt_local->last_seen = jiffies; | |
625 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 626 | |
c5caf4ef LL |
627 | /* the batman interface mac and multicast addresses should never be |
628 | * purged | |
629 | */ | |
630 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
631 | is_multicast_ether_addr(addr)) | |
47c94655 | 632 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 633 | |
807736f6 | 634 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 635 | batadv_choose_tt, &tt_local->common, |
47c94655 | 636 | &tt_local->common.hash_entry); |
80b3f58c SW |
637 | |
638 | if (unlikely(hash_added != 0)) { | |
639 | /* remove the reference for the hash */ | |
47c94655 | 640 | batadv_tt_local_entry_free_ref(tt_local); |
35df3b29 | 641 | batadv_softif_vlan_free_ref(vlan); |
80b3f58c SW |
642 | goto out; |
643 | } | |
644 | ||
068ee6e2 | 645 | add_event: |
3abe4adb | 646 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 647 | |
068ee6e2 AQ |
648 | check_roaming: |
649 | /* Check whether it is a roaming, but don't do anything if the roaming | |
650 | * process has already been handled | |
651 | */ | |
652 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 653 | /* These node are probably going to update their tt table */ |
47c94655 | 654 | head = &tt_global->orig_list; |
db08e6e5 | 655 | rcu_read_lock(); |
b67bfe0d | 656 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 657 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 658 | tt_global->common.vid, |
a513088d | 659 | orig_entry->orig_node); |
db08e6e5 SW |
660 | } |
661 | rcu_read_unlock(); | |
068ee6e2 AQ |
662 | if (roamed_back) { |
663 | batadv_tt_global_free(bat_priv, tt_global, | |
664 | "Roaming canceled"); | |
665 | tt_global = NULL; | |
666 | } else { | |
667 | /* The global entry has to be marked as ROAMING and | |
668 | * has to be kept for consistency purpose | |
669 | */ | |
670 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
671 | tt_global->roam_at = jiffies; | |
672 | } | |
7683fdc1 | 673 | } |
068ee6e2 | 674 | |
3c4f7ab6 AQ |
675 | /* store the current remote flags before altering them. This helps |
676 | * understanding is flags are changing or not | |
677 | */ | |
678 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
679 | ||
680 | if (batadv_is_wifi_netdev(in_dev)) | |
681 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
682 | else | |
683 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 684 | |
9464d071 AQ |
685 | /* check the mark in the skb: if it's equal to the configured |
686 | * isolation_mark, it means the packet is coming from an isolated | |
687 | * non-mesh client | |
688 | */ | |
689 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
690 | if (bat_priv->isolation_mark_mask && | |
691 | match_mark == bat_priv->isolation_mark) | |
692 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
693 | else | |
694 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
695 | ||
3c4f7ab6 AQ |
696 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
697 | * entry so that all the nodes can get the new flags | |
698 | */ | |
699 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
700 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
701 | ||
702 | ret = true; | |
7683fdc1 | 703 | out: |
0c69aecc AQ |
704 | if (in_dev) |
705 | dev_put(in_dev); | |
47c94655 AQ |
706 | if (tt_local) |
707 | batadv_tt_local_entry_free_ref(tt_local); | |
708 | if (tt_global) | |
709 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 710 | return ret; |
c6c8fea2 SE |
711 | } |
712 | ||
7ea7b4a1 AQ |
713 | /** |
714 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
715 | * within a TT Response directed to another node | |
716 | * @orig_node: originator for which the TT data has to be prepared | |
717 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
718 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
719 | * changed can be stored | |
720 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
721 | * function reserves the amount of space needed to send the entire global TT | |
722 | * table. In case of success the value is updated with the real amount of | |
723 | * reserved bytes | |
724 | ||
725 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
726 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
727 | * objects, one per active VLAN served by the originator node. | |
728 | * | |
62fe710f | 729 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 730 | */ |
6b5e971a | 731 | static u16 |
7ea7b4a1 AQ |
732 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
733 | struct batadv_tvlv_tt_data **tt_data, | |
734 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 735 | s32 *tt_len) |
7ea7b4a1 | 736 | { |
4f248cff SE |
737 | u16 num_vlan = 0; |
738 | u16 num_entries = 0; | |
739 | u16 change_offset; | |
740 | u16 tvlv_len; | |
7ea7b4a1 AQ |
741 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
742 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 743 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
744 | |
745 | rcu_read_lock(); | |
d0fa4f3f | 746 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
747 | num_vlan++; |
748 | num_entries += atomic_read(&vlan->tt.num_entries); | |
749 | } | |
750 | ||
751 | change_offset = sizeof(**tt_data); | |
752 | change_offset += num_vlan * sizeof(*tt_vlan); | |
753 | ||
754 | /* if tt_len is negative, allocate the space needed by the full table */ | |
755 | if (*tt_len < 0) | |
756 | *tt_len = batadv_tt_len(num_entries); | |
757 | ||
758 | tvlv_len = *tt_len; | |
759 | tvlv_len += change_offset; | |
760 | ||
761 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
762 | if (!*tt_data) { | |
763 | *tt_len = 0; | |
764 | goto out; | |
765 | } | |
766 | ||
767 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
768 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
769 | (*tt_data)->num_vlan = htons(num_vlan); | |
770 | ||
771 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
d0fa4f3f | 772 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
773 | tt_vlan->vid = htons(vlan->vid); |
774 | tt_vlan->crc = htonl(vlan->tt.crc); | |
775 | ||
776 | tt_vlan++; | |
777 | } | |
778 | ||
6b5e971a | 779 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
780 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
781 | ||
782 | out: | |
783 | rcu_read_unlock(); | |
784 | return tvlv_len; | |
785 | } | |
786 | ||
787 | /** | |
788 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
789 | * node | |
790 | * @bat_priv: the bat priv with all the soft interface information | |
791 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
792 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
793 | * changes can be stored | |
794 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
795 | * function reserves the amount of space needed to send the entire local TT | |
796 | * table. In case of success the value is updated with the real amount of | |
797 | * reserved bytes | |
798 | * | |
799 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
800 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
801 | * objects, one per active VLAN. | |
802 | * | |
62fe710f | 803 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 804 | */ |
6b5e971a | 805 | static u16 |
7ea7b4a1 AQ |
806 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
807 | struct batadv_tvlv_tt_data **tt_data, | |
808 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 809 | s32 *tt_len) |
7ea7b4a1 AQ |
810 | { |
811 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
812 | struct batadv_softif_vlan *vlan; | |
4f248cff SE |
813 | u16 num_vlan = 0; |
814 | u16 num_entries = 0; | |
815 | u16 tvlv_len; | |
6b5e971a | 816 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
817 | int change_offset; |
818 | ||
819 | rcu_read_lock(); | |
820 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
821 | num_vlan++; | |
822 | num_entries += atomic_read(&vlan->tt.num_entries); | |
823 | } | |
824 | ||
825 | change_offset = sizeof(**tt_data); | |
826 | change_offset += num_vlan * sizeof(*tt_vlan); | |
827 | ||
828 | /* if tt_len is negative, allocate the space needed by the full table */ | |
829 | if (*tt_len < 0) | |
830 | *tt_len = batadv_tt_len(num_entries); | |
831 | ||
832 | tvlv_len = *tt_len; | |
833 | tvlv_len += change_offset; | |
834 | ||
835 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
836 | if (!*tt_data) { | |
837 | tvlv_len = 0; | |
838 | goto out; | |
839 | } | |
840 | ||
841 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
842 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
843 | (*tt_data)->num_vlan = htons(num_vlan); | |
844 | ||
845 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
846 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
847 | tt_vlan->vid = htons(vlan->vid); | |
848 | tt_vlan->crc = htonl(vlan->tt.crc); | |
849 | ||
850 | tt_vlan++; | |
851 | } | |
852 | ||
6b5e971a | 853 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
854 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
855 | ||
856 | out: | |
857 | rcu_read_unlock(); | |
858 | return tvlv_len; | |
859 | } | |
860 | ||
e1bf0c14 ML |
861 | /** |
862 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
863 | * after local tt changes have been committed | |
864 | * @bat_priv: the bat priv with all the soft interface information | |
865 | */ | |
866 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 867 | { |
e1bf0c14 ML |
868 | struct batadv_tt_change_node *entry, *safe; |
869 | struct batadv_tvlv_tt_data *tt_data; | |
870 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 871 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
872 | int tt_diff_entries_num = 0; |
873 | int tt_diff_entries_count = 0; | |
6b5e971a | 874 | u16 tvlv_len; |
be9aa4c1 | 875 | |
7ea7b4a1 AQ |
876 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
877 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
878 | |
879 | /* if we have too many changes for one packet don't send any | |
880 | * and wait for the tt table request which will be fragmented | |
881 | */ | |
e1bf0c14 ML |
882 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
883 | tt_diff_len = 0; | |
be9aa4c1 | 884 | |
7ea7b4a1 AQ |
885 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
886 | &tt_change, &tt_diff_len); | |
887 | if (!tvlv_len) | |
e1bf0c14 | 888 | return; |
be9aa4c1 | 889 | |
e1bf0c14 | 890 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 891 | |
e1bf0c14 ML |
892 | if (tt_diff_len == 0) |
893 | goto container_register; | |
be9aa4c1 | 894 | |
807736f6 SE |
895 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
896 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 897 | |
807736f6 | 898 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 899 | list) { |
e1bf0c14 ML |
900 | if (tt_diff_entries_count < tt_diff_entries_num) { |
901 | memcpy(tt_change + tt_diff_entries_count, | |
902 | &entry->change, | |
903 | sizeof(struct batadv_tvlv_tt_change)); | |
904 | tt_diff_entries_count++; | |
c6c8fea2 | 905 | } |
a73105b8 AQ |
906 | list_del(&entry->list); |
907 | kfree(entry); | |
c6c8fea2 | 908 | } |
807736f6 | 909 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
910 | |
911 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
912 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
913 | kfree(bat_priv->tt.last_changeset); | |
914 | bat_priv->tt.last_changeset_len = 0; | |
915 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 916 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 917 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 918 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 919 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
920 | * instead of providing the diff |
921 | */ | |
e1bf0c14 | 922 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 923 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
924 | memcpy(bat_priv->tt.last_changeset, |
925 | tt_change, tt_change_len); | |
926 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
927 | } |
928 | } | |
807736f6 | 929 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 930 | |
e1bf0c14 ML |
931 | container_register: |
932 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 933 | tvlv_len); |
e1bf0c14 | 934 | kfree(tt_data); |
c6c8fea2 SE |
935 | } |
936 | ||
08c36d3e | 937 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
938 | { |
939 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 940 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 941 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 942 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 943 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 944 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 945 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 946 | struct hlist_head *head; |
7ea7b4a1 | 947 | unsigned short vid; |
6b5e971a | 948 | u32 i; |
85766a82 AQ |
949 | int last_seen_secs; |
950 | int last_seen_msecs; | |
951 | unsigned long last_seen_jiffies; | |
952 | bool no_purge; | |
6b5e971a | 953 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 954 | |
30da63a6 ML |
955 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
956 | if (!primary_if) | |
32ae9b22 | 957 | goto out; |
c6c8fea2 | 958 | |
86ceb360 | 959 | seq_printf(seq, |
7ea7b4a1 | 960 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 961 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
dd24ddb2 | 962 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 963 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 964 | |
c6c8fea2 SE |
965 | for (i = 0; i < hash->size; i++) { |
966 | head = &hash->table[i]; | |
967 | ||
7aadf889 | 968 | rcu_read_lock(); |
b67bfe0d | 969 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 970 | head, hash_entry) { |
85766a82 AQ |
971 | tt_local = container_of(tt_common_entry, |
972 | struct batadv_tt_local_entry, | |
973 | common); | |
7ea7b4a1 | 974 | vid = tt_common_entry->vid; |
85766a82 AQ |
975 | last_seen_jiffies = jiffies - tt_local->last_seen; |
976 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
977 | last_seen_secs = last_seen_msecs / 1000; | |
978 | last_seen_msecs = last_seen_msecs % 1000; | |
979 | ||
980 | no_purge = tt_common_entry->flags & np_flag; | |
981 | ||
7ea7b4a1 AQ |
982 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
983 | if (!vlan) { | |
984 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
985 | BATADV_PRINT_VID(vid)); | |
986 | continue; | |
987 | } | |
988 | ||
989 | seq_printf(seq, | |
dd24ddb2 | 990 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 991 | tt_common_entry->addr, |
16052789 | 992 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
993 | ((tt_common_entry->flags & |
994 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 995 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
996 | ((tt_common_entry->flags & |
997 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
998 | ((tt_common_entry->flags & | |
999 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
1000 | ((tt_common_entry->flags & | |
1001 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1002 | ((tt_common_entry->flags & | |
1003 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1004 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
1005 | no_purge ? 0 : last_seen_msecs, |
1006 | vlan->tt.crc); | |
1007 | ||
1008 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 1009 | } |
7aadf889 | 1010 | rcu_read_unlock(); |
c6c8fea2 | 1011 | } |
32ae9b22 ML |
1012 | out: |
1013 | if (primary_if) | |
e5d89254 | 1014 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1015 | return 0; |
c6c8fea2 SE |
1016 | } |
1017 | ||
56303d34 SE |
1018 | static void |
1019 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1020 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1021 | u16 flags, const char *message) |
c6c8fea2 | 1022 | { |
3abe4adb | 1023 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1024 | |
015758d0 AQ |
1025 | /* The local client has to be marked as "pending to be removed" but has |
1026 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1027 | * response issued before the net ttvn increment (consistency check) |
1028 | */ | |
acd34afa | 1029 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1030 | |
39c75a51 | 1031 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1032 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1033 | tt_local_entry->common.addr, | |
1034 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1035 | } |
1036 | ||
7f91d06c AQ |
1037 | /** |
1038 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1039 | * @bat_priv: the bat priv with all the soft interface information | |
1040 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1041 | * @vid: VLAN identifier |
7f91d06c AQ |
1042 | * @message: message to append to the log on deletion |
1043 | * @roaming: true if the deletion is due to a roaming event | |
1044 | * | |
62fe710f | 1045 | * Return: the flags assigned to the local entry before being deleted |
7f91d06c | 1046 | */ |
6b5e971a SE |
1047 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1048 | unsigned short vid, const char *message, | |
1049 | bool roaming) | |
c6c8fea2 | 1050 | { |
170173bf | 1051 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1052 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
35df3b29 | 1053 | struct batadv_softif_vlan *vlan; |
ef72706a | 1054 | void *tt_entry_exists; |
c6c8fea2 | 1055 | |
c018ad3d | 1056 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1057 | if (!tt_local_entry) |
1058 | goto out; | |
1059 | ||
7f91d06c AQ |
1060 | curr_flags = tt_local_entry->common.flags; |
1061 | ||
acd34afa | 1062 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1063 | /* if this global entry addition is due to a roaming, the node has to |
1064 | * mark the local entry as "roamed" in order to correctly reroute | |
1065 | * packets later | |
1066 | */ | |
7c1fd91d | 1067 | if (roaming) { |
acd34afa | 1068 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1069 | /* mark the local client as ROAMed */ |
1070 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1071 | } | |
42d0b044 | 1072 | |
068ee6e2 AQ |
1073 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1074 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1075 | message); | |
1076 | goto out; | |
1077 | } | |
1078 | /* if this client has been added right now, it is possible to | |
1079 | * immediately purge it | |
1080 | */ | |
3abe4adb | 1081 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1082 | |
1083 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1084 | batadv_compare_tt, | |
1085 | batadv_choose_tt, | |
1086 | &tt_local_entry->common); | |
1087 | if (!tt_entry_exists) | |
1088 | goto out; | |
1089 | ||
1090 | /* extra call to free the local tt entry */ | |
068ee6e2 | 1091 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c | 1092 | |
35df3b29 AQ |
1093 | /* decrease the reference held for this vlan */ |
1094 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc ML |
1095 | if (!vlan) |
1096 | goto out; | |
1097 | ||
35df3b29 AQ |
1098 | batadv_softif_vlan_free_ref(vlan); |
1099 | batadv_softif_vlan_free_ref(vlan); | |
1100 | ||
7683fdc1 AQ |
1101 | out: |
1102 | if (tt_local_entry) | |
a513088d | 1103 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1104 | |
1105 | return curr_flags; | |
c6c8fea2 SE |
1106 | } |
1107 | ||
a19d3d85 ML |
1108 | /** |
1109 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1110 | * @bat_priv: the bat priv with all the soft interface information | |
1111 | * @head: pointer to the list containing the local tt entries | |
1112 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1113 | * inactive or not | |
1114 | */ | |
56303d34 | 1115 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1116 | struct hlist_head *head, |
1117 | int timeout) | |
c6c8fea2 | 1118 | { |
56303d34 SE |
1119 | struct batadv_tt_local_entry *tt_local_entry; |
1120 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1121 | struct hlist_node *node_tmp; |
acd34afa | 1122 | |
b67bfe0d | 1123 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1124 | hash_entry) { |
1125 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1126 | struct batadv_tt_local_entry, |
1127 | common); | |
acd34afa SE |
1128 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1129 | continue; | |
1130 | ||
1131 | /* entry already marked for deletion */ | |
1132 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1133 | continue; | |
1134 | ||
a19d3d85 | 1135 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1136 | continue; |
1137 | ||
1138 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1139 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1140 | } | |
1141 | } | |
1142 | ||
a19d3d85 ML |
1143 | /** |
1144 | * batadv_tt_local_purge - purge inactive tt local entries | |
1145 | * @bat_priv: the bat priv with all the soft interface information | |
1146 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1147 | * inactive or not | |
1148 | */ | |
1149 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1150 | int timeout) | |
acd34afa | 1151 | { |
807736f6 | 1152 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1153 | struct hlist_head *head; |
7683fdc1 | 1154 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1155 | u32 i; |
c6c8fea2 | 1156 | |
c6c8fea2 SE |
1157 | for (i = 0; i < hash->size; i++) { |
1158 | head = &hash->table[i]; | |
7683fdc1 | 1159 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1160 | |
7683fdc1 | 1161 | spin_lock_bh(list_lock); |
a19d3d85 | 1162 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1163 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1164 | } |
c6c8fea2 SE |
1165 | } |
1166 | ||
56303d34 | 1167 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1168 | { |
5bf74e9c | 1169 | struct batadv_hashtable *hash; |
a73105b8 | 1170 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1171 | struct batadv_tt_common_entry *tt_common_entry; |
1172 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 1173 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 1174 | struct hlist_node *node_tmp; |
7683fdc1 | 1175 | struct hlist_head *head; |
6b5e971a | 1176 | u32 i; |
a73105b8 | 1177 | |
807736f6 | 1178 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1179 | return; |
1180 | ||
807736f6 | 1181 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1182 | |
1183 | for (i = 0; i < hash->size; i++) { | |
1184 | head = &hash->table[i]; | |
1185 | list_lock = &hash->list_locks[i]; | |
1186 | ||
1187 | spin_lock_bh(list_lock); | |
b67bfe0d | 1188 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1189 | head, hash_entry) { |
b67bfe0d | 1190 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1191 | tt_local = container_of(tt_common_entry, |
1192 | struct batadv_tt_local_entry, | |
1193 | common); | |
35df3b29 AQ |
1194 | |
1195 | /* decrease the reference held for this vlan */ | |
1196 | vlan = batadv_softif_vlan_get(bat_priv, | |
1197 | tt_common_entry->vid); | |
354136bc ML |
1198 | if (vlan) { |
1199 | batadv_softif_vlan_free_ref(vlan); | |
1200 | batadv_softif_vlan_free_ref(vlan); | |
1201 | } | |
35df3b29 | 1202 | |
56303d34 | 1203 | batadv_tt_local_entry_free_ref(tt_local); |
a73105b8 AQ |
1204 | } |
1205 | spin_unlock_bh(list_lock); | |
1206 | } | |
1207 | ||
1a8eaf07 | 1208 | batadv_hash_destroy(hash); |
a73105b8 | 1209 | |
807736f6 | 1210 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1211 | } |
1212 | ||
56303d34 | 1213 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1214 | { |
807736f6 | 1215 | if (bat_priv->tt.global_hash) |
5346c35e | 1216 | return 0; |
c6c8fea2 | 1217 | |
807736f6 | 1218 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1219 | |
807736f6 | 1220 | if (!bat_priv->tt.global_hash) |
5346c35e | 1221 | return -ENOMEM; |
c6c8fea2 | 1222 | |
dec05074 AQ |
1223 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1224 | &batadv_tt_global_hash_lock_class_key); | |
1225 | ||
5346c35e | 1226 | return 0; |
c6c8fea2 SE |
1227 | } |
1228 | ||
56303d34 | 1229 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1230 | { |
56303d34 | 1231 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1232 | |
807736f6 | 1233 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1234 | |
807736f6 | 1235 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1236 | list) { |
1237 | list_del(&entry->list); | |
1238 | kfree(entry); | |
1239 | } | |
c6c8fea2 | 1240 | |
807736f6 SE |
1241 | atomic_set(&bat_priv->tt.local_changes, 0); |
1242 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1243 | } |
c6c8fea2 | 1244 | |
62fe710f SE |
1245 | /** |
1246 | * batadv_tt_global_orig_entry_find | |
1247 | * | |
1248 | * retrieves the orig_tt_list_entry belonging to orig_node from the | |
d657e621 AQ |
1249 | * batadv_tt_global_entry list |
1250 | * | |
62fe710f | 1251 | * Return: it with an increased refcounter, NULL if not found |
db08e6e5 | 1252 | */ |
d657e621 AQ |
1253 | static struct batadv_tt_orig_list_entry * |
1254 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1255 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1256 | { |
d657e621 | 1257 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1258 | const struct hlist_head *head; |
db08e6e5 SW |
1259 | |
1260 | rcu_read_lock(); | |
1261 | head = &entry->orig_list; | |
b67bfe0d | 1262 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1263 | if (tmp_orig_entry->orig_node != orig_node) |
1264 | continue; | |
1265 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1266 | continue; | |
1267 | ||
1268 | orig_entry = tmp_orig_entry; | |
1269 | break; | |
db08e6e5 SW |
1270 | } |
1271 | rcu_read_unlock(); | |
d657e621 AQ |
1272 | |
1273 | return orig_entry; | |
1274 | } | |
1275 | ||
62fe710f SE |
1276 | /** |
1277 | * batadv_tt_global_entry_has_orig | |
1278 | * | |
1279 | * find out if an orig_node is already in the list of a tt_global_entry. | |
1280 | * | |
1281 | * Return: true if found, false otherwise | |
d657e621 AQ |
1282 | */ |
1283 | static bool | |
1284 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1285 | const struct batadv_orig_node *orig_node) | |
1286 | { | |
1287 | struct batadv_tt_orig_list_entry *orig_entry; | |
1288 | bool found = false; | |
1289 | ||
1290 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1291 | if (orig_entry) { | |
1292 | found = true; | |
1293 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1294 | } | |
1295 | ||
db08e6e5 SW |
1296 | return found; |
1297 | } | |
1298 | ||
a513088d | 1299 | static void |
d657e621 | 1300 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1301 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1302 | { |
56303d34 | 1303 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1304 | |
d657e621 | 1305 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1306 | if (orig_entry) { |
1307 | /* refresh the ttvn: the current value could be a bogus one that | |
1308 | * was added during a "temporary client detection" | |
1309 | */ | |
1310 | orig_entry->ttvn = ttvn; | |
d657e621 | 1311 | goto out; |
30cfd02b | 1312 | } |
d657e621 | 1313 | |
db08e6e5 SW |
1314 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1315 | if (!orig_entry) | |
d657e621 | 1316 | goto out; |
db08e6e5 SW |
1317 | |
1318 | INIT_HLIST_NODE(&orig_entry->list); | |
1319 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1320 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1321 | orig_entry->orig_node = orig_node; |
1322 | orig_entry->ttvn = ttvn; | |
d657e621 | 1323 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1324 | |
d657e621 | 1325 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1326 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1327 | &tt_global->orig_list); |
1328 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1329 | atomic_inc(&tt_global->orig_list_count); |
1330 | ||
d657e621 AQ |
1331 | out: |
1332 | if (orig_entry) | |
1333 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1334 | } |
1335 | ||
d4ff40f6 AQ |
1336 | /** |
1337 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1338 | * @bat_priv: the bat priv with all the soft interface information | |
1339 | * @orig_node: the originator announcing the client | |
1340 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1341 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1342 | * @flags: TT flags that have to be set for this non-mesh client |
1343 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1344 | * | |
1345 | * Add a new TT global entry for the given originator. If the entry already | |
1346 | * exists add a new reference to the given originator (a global entry can have | |
1347 | * references to multiple originators) and adjust the flags attribute to reflect | |
1348 | * the function argument. | |
1349 | * If a TT local entry exists for this non-mesh client remove it. | |
1350 | * | |
1351 | * The caller must hold orig_node refcount. | |
1e5d49fc | 1352 | * |
62fe710f | 1353 | * Return: true if the new entry has been added, false otherwise |
d4ff40f6 | 1354 | */ |
1e5d49fc AQ |
1355 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1356 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1357 | const unsigned char *tt_addr, |
6b5e971a | 1358 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1359 | { |
170173bf SE |
1360 | struct batadv_tt_global_entry *tt_global_entry; |
1361 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1362 | bool ret = false; |
80b3f58c | 1363 | int hash_added; |
56303d34 | 1364 | struct batadv_tt_common_entry *common; |
6b5e971a | 1365 | u16 local_flags; |
c6c8fea2 | 1366 | |
cfd4f757 AQ |
1367 | /* ignore global entries from backbone nodes */ |
1368 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1369 | return true; | |
1370 | ||
c018ad3d AQ |
1371 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1372 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1373 | |
1374 | /* if the node already has a local client for this entry, it has to wait | |
1375 | * for a roaming advertisement instead of manually messing up the global | |
1376 | * table | |
1377 | */ | |
1378 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1379 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1380 | goto out; | |
a73105b8 AQ |
1381 | |
1382 | if (!tt_global_entry) { | |
d4f44692 | 1383 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1384 | if (!tt_global_entry) |
7683fdc1 AQ |
1385 | goto out; |
1386 | ||
c0a55929 | 1387 | common = &tt_global_entry->common; |
8fdd0153 | 1388 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1389 | common->vid = vid; |
db08e6e5 | 1390 | |
d4f44692 | 1391 | common->flags = flags; |
cc47f66e | 1392 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1393 | /* node must store current time in case of roaming. This is |
1394 | * needed to purge this entry out on timeout (if nobody claims | |
1395 | * it) | |
1396 | */ | |
1397 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1398 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1399 | atomic_set(&common->refcount, 2); |
30cfd02b | 1400 | common->added_at = jiffies; |
db08e6e5 SW |
1401 | |
1402 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1403 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1404 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1405 | |
807736f6 | 1406 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1407 | batadv_compare_tt, |
c018ad3d | 1408 | batadv_choose_tt, common, |
a513088d | 1409 | &common->hash_entry); |
80b3f58c SW |
1410 | |
1411 | if (unlikely(hash_added != 0)) { | |
1412 | /* remove the reference for the hash */ | |
a513088d | 1413 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1414 | goto out_remove; |
1415 | } | |
a73105b8 | 1416 | } else { |
068ee6e2 | 1417 | common = &tt_global_entry->common; |
30cfd02b AQ |
1418 | /* If there is already a global entry, we can use this one for |
1419 | * our processing. | |
068ee6e2 AQ |
1420 | * But if we are trying to add a temporary client then here are |
1421 | * two options at this point: | |
1422 | * 1) the global client is not a temporary client: the global | |
1423 | * client has to be left as it is, temporary information | |
1424 | * should never override any already known client state | |
1425 | * 2) the global client is a temporary client: purge the | |
1426 | * originator list and add the new one orig_entry | |
30cfd02b | 1427 | */ |
068ee6e2 AQ |
1428 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1429 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1430 | goto out; | |
1431 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1432 | orig_node)) | |
1433 | goto out_remove; | |
1434 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1435 | goto add_orig_entry; | |
1436 | } | |
30cfd02b AQ |
1437 | |
1438 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1439 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1440 | * remove the previous temporary orig node and re-add it | |
1441 | * if required. If the orig entry changed, the new one which | |
1442 | * is a non-temporary entry is preferred. | |
30cfd02b | 1443 | */ |
a6cb3909 SW |
1444 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1445 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1446 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1447 | } | |
db08e6e5 | 1448 | |
e9c00136 AQ |
1449 | /* the change can carry possible "attribute" flags like the |
1450 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1451 | * client entry | |
1452 | */ | |
ad7e2c46 | 1453 | common->flags |= flags; |
e9c00136 | 1454 | |
acd34afa SE |
1455 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1456 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1457 | * delete + roaming change for this originator. |
1458 | * | |
1459 | * We should first delete the old originator before adding the | |
1460 | * new one. | |
1461 | */ | |
068ee6e2 | 1462 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1463 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1464 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1465 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1466 | } |
1467 | } | |
068ee6e2 | 1468 | add_orig_entry: |
30cfd02b | 1469 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1470 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1471 | |
39c75a51 | 1472 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1473 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1474 | common->addr, BATADV_PRINT_VID(common->vid), | |
1475 | orig_node->orig); | |
1e5d49fc | 1476 | ret = true; |
c6c8fea2 | 1477 | |
80b3f58c | 1478 | out_remove: |
c5caf4ef LL |
1479 | /* Do not remove multicast addresses from the local hash on |
1480 | * global additions | |
1481 | */ | |
1482 | if (is_multicast_ether_addr(tt_addr)) | |
1483 | goto out; | |
7f91d06c | 1484 | |
a73105b8 | 1485 | /* remove address from local hash if present */ |
c018ad3d | 1486 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1487 | "global tt received", |
c1d07431 | 1488 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1489 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1490 | ||
068ee6e2 AQ |
1491 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1492 | /* this is a normal global add. Therefore the client is not in a | |
1493 | * roaming state anymore. | |
1494 | */ | |
1495 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1496 | ||
7683fdc1 AQ |
1497 | out: |
1498 | if (tt_global_entry) | |
a513088d | 1499 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1500 | if (tt_local_entry) |
1501 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1502 | return ret; |
c6c8fea2 SE |
1503 | } |
1504 | ||
1b371d13 SW |
1505 | /** |
1506 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1507 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1508 | * @tt_global_entry: global translation table entry to be analyzed |
1509 | * | |
1510 | * This functon assumes the caller holds rcu_read_lock(). | |
62fe710f | 1511 | * Return: best originator list entry or NULL on errors. |
981d8900 SE |
1512 | */ |
1513 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1514 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1515 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1516 | { |
4627456a AQ |
1517 | struct batadv_neigh_node *router, *best_router = NULL; |
1518 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1519 | struct hlist_head *head; |
981d8900 | 1520 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1521 | |
1522 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1523 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1524 | router = batadv_orig_router_get(orig_entry->orig_node, |
1525 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1526 | if (!router) |
1527 | continue; | |
1528 | ||
4627456a | 1529 | if (best_router && |
89652331 SW |
1530 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1531 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1532 | batadv_neigh_node_free_ref(router); |
1533 | continue; | |
981d8900 SE |
1534 | } |
1535 | ||
4627456a AQ |
1536 | /* release the refcount for the "old" best */ |
1537 | if (best_router) | |
1538 | batadv_neigh_node_free_ref(best_router); | |
1539 | ||
1540 | best_entry = orig_entry; | |
1541 | best_router = router; | |
981d8900 SE |
1542 | } |
1543 | ||
4627456a AQ |
1544 | if (best_router) |
1545 | batadv_neigh_node_free_ref(best_router); | |
1546 | ||
981d8900 SE |
1547 | return best_entry; |
1548 | } | |
1549 | ||
1b371d13 SW |
1550 | /** |
1551 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1552 | * for this global entry | |
4627456a | 1553 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1554 | * @tt_global_entry: global translation table entry to be printed |
1555 | * @seq: debugfs table seq_file struct | |
1556 | * | |
1557 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1558 | */ |
a513088d | 1559 | static void |
4627456a AQ |
1560 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1561 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1562 | struct seq_file *seq) |
db08e6e5 | 1563 | { |
981d8900 | 1564 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1565 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1566 | struct batadv_orig_node_vlan *vlan; |
1567 | struct hlist_head *head; | |
6b5e971a SE |
1568 | u8 last_ttvn; |
1569 | u16 flags; | |
db08e6e5 SW |
1570 | |
1571 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1572 | flags = tt_common_entry->flags; |
1573 | ||
4627456a | 1574 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1575 | if (best_entry) { |
7ea7b4a1 AQ |
1576 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1577 | tt_common_entry->vid); | |
1578 | if (!vlan) { | |
1579 | seq_printf(seq, | |
1580 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1581 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1582 | best_entry->orig_node->orig); | |
1583 | goto print_list; | |
1584 | } | |
1585 | ||
981d8900 | 1586 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1587 | seq_printf(seq, |
dd24ddb2 | 1588 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1589 | '*', tt_global_entry->common.addr, |
16052789 | 1590 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1591 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1592 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1593 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1594 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1595 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1596 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1597 | |
1598 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1599 | } |
db08e6e5 | 1600 | |
7ea7b4a1 | 1601 | print_list: |
db08e6e5 SW |
1602 | head = &tt_global_entry->orig_list; |
1603 | ||
b67bfe0d | 1604 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1605 | if (best_entry == orig_entry) |
1606 | continue; | |
1607 | ||
7ea7b4a1 AQ |
1608 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1609 | tt_common_entry->vid); | |
1610 | if (!vlan) { | |
1611 | seq_printf(seq, | |
1612 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1613 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1614 | orig_entry->orig_node->orig); | |
1615 | continue; | |
1616 | } | |
1617 | ||
db08e6e5 | 1618 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1619 | seq_printf(seq, |
dd24ddb2 | 1620 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1621 | '+', tt_global_entry->common.addr, |
16052789 | 1622 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1623 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1624 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1625 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1626 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1627 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1628 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1629 | |
1630 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1631 | } |
1632 | } | |
1633 | ||
08c36d3e | 1634 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1635 | { |
1636 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1637 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1638 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1639 | struct batadv_tt_common_entry *tt_common_entry; |
1640 | struct batadv_tt_global_entry *tt_global; | |
1641 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1642 | struct hlist_head *head; |
6b5e971a | 1643 | u32 i; |
c6c8fea2 | 1644 | |
30da63a6 ML |
1645 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1646 | if (!primary_if) | |
32ae9b22 | 1647 | goto out; |
c6c8fea2 | 1648 | |
2dafb49d AQ |
1649 | seq_printf(seq, |
1650 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1651 | net_dev->name); |
16052789 AQ |
1652 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1653 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1654 | "CRC", "Flags"); | |
c6c8fea2 | 1655 | |
c6c8fea2 SE |
1656 | for (i = 0; i < hash->size; i++) { |
1657 | head = &hash->table[i]; | |
1658 | ||
7aadf889 | 1659 | rcu_read_lock(); |
b67bfe0d | 1660 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1661 | head, hash_entry) { |
56303d34 SE |
1662 | tt_global = container_of(tt_common_entry, |
1663 | struct batadv_tt_global_entry, | |
1664 | common); | |
4627456a | 1665 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1666 | } |
7aadf889 | 1667 | rcu_read_unlock(); |
c6c8fea2 | 1668 | } |
32ae9b22 ML |
1669 | out: |
1670 | if (primary_if) | |
e5d89254 | 1671 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1672 | return 0; |
c6c8fea2 SE |
1673 | } |
1674 | ||
1d8ab8d3 | 1675 | /** |
433ff98f | 1676 | * _batadv_tt_global_del_orig_entry - remove and free an orig_entry |
1d8ab8d3 LL |
1677 | * @tt_global_entry: the global entry to remove the orig_entry from |
1678 | * @orig_entry: the orig entry to remove and free | |
1679 | * | |
1680 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1681 | * free this orig_entry afterwards. | |
433ff98f ML |
1682 | * |
1683 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
1684 | * part of a list. | |
1d8ab8d3 LL |
1685 | */ |
1686 | static void | |
433ff98f ML |
1687 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
1688 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 1689 | { |
2c72d655 SE |
1690 | lockdep_assert_held(&tt_global_entry->list_lock); |
1691 | ||
1d8ab8d3 LL |
1692 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1693 | tt_global_entry->common.vid); | |
1694 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
1695 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
1696 | * being part of a list | |
1697 | */ | |
1d8ab8d3 LL |
1698 | hlist_del_rcu(&orig_entry->list); |
1699 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1700 | } | |
1701 | ||
db08e6e5 | 1702 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1703 | static void |
56303d34 | 1704 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1705 | { |
db08e6e5 | 1706 | struct hlist_head *head; |
b67bfe0d | 1707 | struct hlist_node *safe; |
56303d34 | 1708 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1709 | |
db08e6e5 SW |
1710 | spin_lock_bh(&tt_global_entry->list_lock); |
1711 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 1712 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 1713 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 1714 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1715 | } |
1716 | ||
1d8ab8d3 LL |
1717 | /** |
1718 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1719 | * @bat_priv: the bat priv with all the soft interface information | |
1720 | * @tt_global_entry: the global entry to remove the orig_node from | |
1721 | * @orig_node: the originator announcing the client | |
1722 | * @message: message to append to the log on deletion | |
1723 | * | |
1724 | * Remove the given orig_node and its according orig_entry from the given | |
1725 | * global tt entry. | |
1726 | */ | |
a513088d | 1727 | static void |
1d8ab8d3 LL |
1728 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1729 | struct batadv_tt_global_entry *tt_global_entry, | |
1730 | struct batadv_orig_node *orig_node, | |
1731 | const char *message) | |
db08e6e5 SW |
1732 | { |
1733 | struct hlist_head *head; | |
b67bfe0d | 1734 | struct hlist_node *safe; |
56303d34 | 1735 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1736 | unsigned short vid; |
db08e6e5 SW |
1737 | |
1738 | spin_lock_bh(&tt_global_entry->list_lock); | |
1739 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1740 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1741 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1742 | vid = tt_global_entry->common.vid; |
39c75a51 | 1743 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1744 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1745 | orig_node->orig, |
16052789 AQ |
1746 | tt_global_entry->common.addr, |
1747 | BATADV_PRINT_VID(vid), message); | |
433ff98f ML |
1748 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
1749 | orig_entry); | |
db08e6e5 SW |
1750 | } |
1751 | } | |
1752 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1753 | } | |
1754 | ||
db08e6e5 | 1755 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1756 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1757 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1758 | */ |
a513088d | 1759 | static void |
56303d34 SE |
1760 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1761 | struct batadv_tt_global_entry *tt_global_entry, | |
1762 | struct batadv_orig_node *orig_node, | |
1763 | const char *message) | |
db08e6e5 SW |
1764 | { |
1765 | bool last_entry = true; | |
1766 | struct hlist_head *head; | |
56303d34 | 1767 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1768 | |
1769 | /* no local entry exists, case 1: | |
1770 | * Check if this is the last one or if other entries exist. | |
1771 | */ | |
1772 | ||
1773 | rcu_read_lock(); | |
1774 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1775 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1776 | if (orig_entry->orig_node != orig_node) { |
1777 | last_entry = false; | |
1778 | break; | |
1779 | } | |
1780 | } | |
1781 | rcu_read_unlock(); | |
1782 | ||
1783 | if (last_entry) { | |
1784 | /* its the last one, mark for roaming. */ | |
acd34afa | 1785 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1786 | tt_global_entry->roam_at = jiffies; |
1787 | } else | |
1788 | /* there is another entry, we can simply delete this | |
1789 | * one and can still use the other one. | |
1790 | */ | |
1d8ab8d3 LL |
1791 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1792 | orig_node, message); | |
db08e6e5 SW |
1793 | } |
1794 | ||
c018ad3d AQ |
1795 | /** |
1796 | * batadv_tt_global_del - remove a client from the global table | |
1797 | * @bat_priv: the bat priv with all the soft interface information | |
1798 | * @orig_node: an originator serving this client | |
1799 | * @addr: the mac address of the client | |
1800 | * @vid: VLAN identifier | |
1801 | * @message: a message explaining the reason for deleting the client to print | |
1802 | * for debugging purpose | |
1803 | * @roaming: true if the deletion has been triggered by a roaming event | |
1804 | */ | |
56303d34 SE |
1805 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1806 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1807 | const unsigned char *addr, unsigned short vid, |
a513088d | 1808 | const char *message, bool roaming) |
a73105b8 | 1809 | { |
170173bf | 1810 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1811 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1812 | |
c018ad3d | 1813 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1814 | if (!tt_global_entry) |
7683fdc1 | 1815 | goto out; |
a73105b8 | 1816 | |
db08e6e5 | 1817 | if (!roaming) { |
1d8ab8d3 LL |
1818 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1819 | orig_node, message); | |
db08e6e5 SW |
1820 | |
1821 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1822 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1823 | message); | |
db08e6e5 SW |
1824 | |
1825 | goto out; | |
1826 | } | |
92f90f56 SE |
1827 | |
1828 | /* if we are deleting a global entry due to a roam | |
1829 | * event, there are two possibilities: | |
db08e6e5 SW |
1830 | * 1) the client roamed from node A to node B => if there |
1831 | * is only one originator left for this client, we mark | |
acd34afa | 1832 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1833 | * wait for node B to claim it. In case of timeout |
1834 | * the entry is purged. | |
db08e6e5 SW |
1835 | * |
1836 | * If there are other originators left, we directly delete | |
1837 | * the originator. | |
92f90f56 | 1838 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1839 | * the global entry, since it is useless now. |
1840 | */ | |
a513088d | 1841 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1842 | tt_global_entry->common.addr, |
1843 | vid); | |
a513088d | 1844 | if (local_entry) { |
db08e6e5 | 1845 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1846 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1847 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1848 | } else |
1849 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1850 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1851 | orig_node, message); | |
92f90f56 | 1852 | |
cc47f66e | 1853 | out: |
7683fdc1 | 1854 | if (tt_global_entry) |
a513088d SE |
1855 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1856 | if (local_entry) | |
1857 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1858 | } |
1859 | ||
95fb130d AQ |
1860 | /** |
1861 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1862 | * given originator matching the provided vid | |
1863 | * @bat_priv: the bat priv with all the soft interface information | |
1864 | * @orig_node: the originator owning the entries to remove | |
1865 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1866 | * removed | |
1867 | * @message: debug message to print as "reason" | |
1868 | */ | |
56303d34 SE |
1869 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1870 | struct batadv_orig_node *orig_node, | |
6b5e971a | 1871 | s32 match_vid, |
56303d34 | 1872 | const char *message) |
c6c8fea2 | 1873 | { |
56303d34 SE |
1874 | struct batadv_tt_global_entry *tt_global; |
1875 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 1876 | u32 i; |
807736f6 | 1877 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1878 | struct hlist_node *safe; |
a73105b8 | 1879 | struct hlist_head *head; |
7683fdc1 | 1880 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1881 | unsigned short vid; |
c6c8fea2 | 1882 | |
6e801494 SW |
1883 | if (!hash) |
1884 | return; | |
1885 | ||
a73105b8 AQ |
1886 | for (i = 0; i < hash->size; i++) { |
1887 | head = &hash->table[i]; | |
7683fdc1 | 1888 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1889 | |
7683fdc1 | 1890 | spin_lock_bh(list_lock); |
b67bfe0d | 1891 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1892 | head, hash_entry) { |
95fb130d AQ |
1893 | /* remove only matching entries */ |
1894 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1895 | continue; | |
1896 | ||
56303d34 SE |
1897 | tt_global = container_of(tt_common_entry, |
1898 | struct batadv_tt_global_entry, | |
1899 | common); | |
db08e6e5 | 1900 | |
1d8ab8d3 LL |
1901 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1902 | orig_node, message); | |
db08e6e5 | 1903 | |
56303d34 | 1904 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1905 | vid = tt_global->common.vid; |
39c75a51 | 1906 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1907 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1908 | tt_global->common.addr, | |
1909 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1910 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1911 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1912 | } |
a73105b8 | 1913 | } |
7683fdc1 | 1914 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1915 | } |
ac4eebd4 | 1916 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
1917 | } |
1918 | ||
30cfd02b AQ |
1919 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1920 | char **msg) | |
cc47f66e | 1921 | { |
30cfd02b AQ |
1922 | bool purge = false; |
1923 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1924 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1925 | |
30cfd02b AQ |
1926 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1927 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1928 | purge = true; | |
1929 | *msg = "Roaming timeout\n"; | |
1930 | } | |
42d0b044 | 1931 | |
30cfd02b AQ |
1932 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1933 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1934 | purge = true; | |
1935 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1936 | } |
30cfd02b AQ |
1937 | |
1938 | return purge; | |
42d0b044 SE |
1939 | } |
1940 | ||
30cfd02b | 1941 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1942 | { |
807736f6 | 1943 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1944 | struct hlist_head *head; |
b67bfe0d | 1945 | struct hlist_node *node_tmp; |
7683fdc1 | 1946 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1947 | u32 i; |
30cfd02b AQ |
1948 | char *msg = NULL; |
1949 | struct batadv_tt_common_entry *tt_common; | |
1950 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1951 | |
cc47f66e AQ |
1952 | for (i = 0; i < hash->size; i++) { |
1953 | head = &hash->table[i]; | |
7683fdc1 | 1954 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1955 | |
7683fdc1 | 1956 | spin_lock_bh(list_lock); |
b67bfe0d | 1957 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1958 | hash_entry) { |
1959 | tt_global = container_of(tt_common, | |
1960 | struct batadv_tt_global_entry, | |
1961 | common); | |
1962 | ||
1963 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1964 | continue; | |
1965 | ||
1966 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1967 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1968 | tt_global->common.addr, | |
1969 | BATADV_PRINT_VID(tt_global->common.vid), | |
1970 | msg); | |
30cfd02b | 1971 | |
b67bfe0d | 1972 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1973 | |
1974 | batadv_tt_global_entry_free_ref(tt_global); | |
1975 | } | |
7683fdc1 | 1976 | spin_unlock_bh(list_lock); |
cc47f66e | 1977 | } |
cc47f66e AQ |
1978 | } |
1979 | ||
56303d34 | 1980 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1981 | { |
5bf74e9c | 1982 | struct batadv_hashtable *hash; |
7683fdc1 | 1983 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1984 | struct batadv_tt_common_entry *tt_common_entry; |
1985 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1986 | struct hlist_node *node_tmp; |
7683fdc1 | 1987 | struct hlist_head *head; |
6b5e971a | 1988 | u32 i; |
7683fdc1 | 1989 | |
807736f6 | 1990 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1991 | return; |
1992 | ||
807736f6 | 1993 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1994 | |
1995 | for (i = 0; i < hash->size; i++) { | |
1996 | head = &hash->table[i]; | |
1997 | list_lock = &hash->list_locks[i]; | |
1998 | ||
1999 | spin_lock_bh(list_lock); | |
b67bfe0d | 2000 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 2001 | head, hash_entry) { |
b67bfe0d | 2002 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
2003 | tt_global = container_of(tt_common_entry, |
2004 | struct batadv_tt_global_entry, | |
2005 | common); | |
2006 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
2007 | } |
2008 | spin_unlock_bh(list_lock); | |
2009 | } | |
2010 | ||
1a8eaf07 | 2011 | batadv_hash_destroy(hash); |
7683fdc1 | 2012 | |
807736f6 | 2013 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2014 | } |
2015 | ||
56303d34 SE |
2016 | static bool |
2017 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2018 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
2019 | { |
2020 | bool ret = false; | |
2021 | ||
acd34afa SE |
2022 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2023 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
2024 | ret = true; |
2025 | ||
2d2fcc2a AQ |
2026 | /* check if the two clients are marked as isolated */ |
2027 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2028 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
2029 | ret = true; | |
2030 | ||
59b699cd AQ |
2031 | return ret; |
2032 | } | |
2033 | ||
c018ad3d AQ |
2034 | /** |
2035 | * batadv_transtable_search - get the mesh destination for a given client | |
2036 | * @bat_priv: the bat priv with all the soft interface information | |
2037 | * @src: mac address of the source client | |
2038 | * @addr: mac address of the destination client | |
2039 | * @vid: VLAN identifier | |
2040 | * | |
62fe710f | 2041 | * Return: a pointer to the originator that was selected as destination in the |
c018ad3d AQ |
2042 | * mesh for contacting the client 'addr', NULL otherwise. |
2043 | * In case of multiple originators serving the same client, the function returns | |
2044 | * the best one (best in terms of metric towards the destination node). | |
2045 | * | |
2046 | * If the two clients are AP isolated the function returns NULL. | |
2047 | */ | |
56303d34 | 2048 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2049 | const u8 *src, |
2050 | const u8 *addr, | |
c018ad3d | 2051 | unsigned short vid) |
c6c8fea2 | 2052 | { |
56303d34 SE |
2053 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2054 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2055 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2056 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2057 | |
eceb22ae | 2058 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2059 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2060 | if (!tt_local_entry || |
2061 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2062 | goto out; |
2063 | } | |
7aadf889 | 2064 | |
c018ad3d | 2065 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2066 | if (!tt_global_entry) |
7b36e8ee | 2067 | goto out; |
7aadf889 | 2068 | |
3d393e47 | 2069 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2070 | * isolation |
2071 | */ | |
a513088d SE |
2072 | if (tt_local_entry && |
2073 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2074 | goto out; |
2075 | ||
db08e6e5 | 2076 | rcu_read_lock(); |
4627456a | 2077 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2078 | /* found anything? */ |
981d8900 SE |
2079 | if (best_entry) |
2080 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
2081 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
2082 | orig_node = NULL; | |
2083 | rcu_read_unlock(); | |
981d8900 | 2084 | |
7b36e8ee | 2085 | out: |
3d393e47 | 2086 | if (tt_global_entry) |
a513088d | 2087 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 2088 | if (tt_local_entry) |
a513088d | 2089 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 2090 | |
7b36e8ee | 2091 | return orig_node; |
c6c8fea2 | 2092 | } |
a73105b8 | 2093 | |
ced72933 AQ |
2094 | /** |
2095 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2096 | * to the given orig_node | |
2097 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2098 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2099 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2100 | * |
2101 | * This function computes the checksum for the global table corresponding to a | |
2102 | * specific originator. In particular, the checksum is computed as follows: For | |
2103 | * each client connected to the originator the CRC32C of the MAC address and the | |
2104 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2105 | * together. | |
2106 | * | |
2107 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2108 | * produce a unique hash of the table, but since the order which is used to feed | |
2109 | * the CRC32C function affects the result and since every node in the network | |
2110 | * probably sorts the clients differently, the hash function cannot be directly | |
2111 | * computed over the entire table. Hence the CRC32C is used only on | |
2112 | * the single client entry, while all the results are then xor'ed together | |
2113 | * because the XOR operation can combine them all while trying to reduce the | |
2114 | * noise as much as possible. | |
2115 | * | |
62fe710f | 2116 | * Return: the checksum of the global table of a given originator. |
ced72933 | 2117 | */ |
6b5e971a SE |
2118 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2119 | struct batadv_orig_node *orig_node, | |
2120 | unsigned short vid) | |
a73105b8 | 2121 | { |
807736f6 | 2122 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2123 | struct batadv_tt_common_entry *tt_common; |
2124 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2125 | struct hlist_head *head; |
6b5e971a SE |
2126 | u32 i, crc_tmp, crc = 0; |
2127 | u8 flags; | |
a30e22ca | 2128 | __be16 tmp_vid; |
a73105b8 AQ |
2129 | |
2130 | for (i = 0; i < hash->size; i++) { | |
2131 | head = &hash->table[i]; | |
2132 | ||
2133 | rcu_read_lock(); | |
b67bfe0d | 2134 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2135 | tt_global = container_of(tt_common, |
2136 | struct batadv_tt_global_entry, | |
2137 | common); | |
7ea7b4a1 AQ |
2138 | /* compute the CRC only for entries belonging to the |
2139 | * VLAN identified by the vid passed as parameter | |
2140 | */ | |
2141 | if (tt_common->vid != vid) | |
2142 | continue; | |
2143 | ||
db08e6e5 SW |
2144 | /* Roaming clients are in the global table for |
2145 | * consistency only. They don't have to be | |
2146 | * taken into account while computing the | |
2147 | * global crc | |
2148 | */ | |
acd34afa | 2149 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2150 | continue; |
30cfd02b AQ |
2151 | /* Temporary clients have not been announced yet, so |
2152 | * they have to be skipped while computing the global | |
2153 | * crc | |
2154 | */ | |
2155 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2156 | continue; | |
db08e6e5 SW |
2157 | |
2158 | /* find out if this global entry is announced by this | |
2159 | * originator | |
2160 | */ | |
56303d34 | 2161 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2162 | orig_node)) |
db08e6e5 SW |
2163 | continue; |
2164 | ||
a30e22ca AQ |
2165 | /* use network order to read the VID: this ensures that |
2166 | * every node reads the bytes in the same order. | |
2167 | */ | |
2168 | tmp_vid = htons(tt_common->vid); | |
2169 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2170 | |
2171 | /* compute the CRC on flags that have to be kept in sync | |
2172 | * among nodes | |
2173 | */ | |
2174 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2175 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2176 | ||
0ffa9e8d | 2177 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2178 | } |
2179 | rcu_read_unlock(); | |
2180 | } | |
2181 | ||
ced72933 | 2182 | return crc; |
a73105b8 AQ |
2183 | } |
2184 | ||
ced72933 AQ |
2185 | /** |
2186 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2187 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2188 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2189 | * |
2190 | * For details about the computation, please refer to the documentation for | |
2191 | * batadv_tt_global_crc(). | |
2192 | * | |
62fe710f | 2193 | * Return: the checksum of the local table |
ced72933 | 2194 | */ |
6b5e971a SE |
2195 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2196 | unsigned short vid) | |
a73105b8 | 2197 | { |
807736f6 | 2198 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2199 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2200 | struct hlist_head *head; |
6b5e971a SE |
2201 | u32 i, crc_tmp, crc = 0; |
2202 | u8 flags; | |
a30e22ca | 2203 | __be16 tmp_vid; |
a73105b8 AQ |
2204 | |
2205 | for (i = 0; i < hash->size; i++) { | |
2206 | head = &hash->table[i]; | |
2207 | ||
2208 | rcu_read_lock(); | |
b67bfe0d | 2209 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2210 | /* compute the CRC only for entries belonging to the |
2211 | * VLAN identified by vid | |
2212 | */ | |
2213 | if (tt_common->vid != vid) | |
2214 | continue; | |
2215 | ||
058d0e26 | 2216 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2217 | * account while computing the CRC |
2218 | */ | |
acd34afa | 2219 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2220 | continue; |
ced72933 | 2221 | |
a30e22ca AQ |
2222 | /* use network order to read the VID: this ensures that |
2223 | * every node reads the bytes in the same order. | |
2224 | */ | |
2225 | tmp_vid = htons(tt_common->vid); | |
2226 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2227 | |
2228 | /* compute the CRC on flags that have to be kept in sync | |
2229 | * among nodes | |
2230 | */ | |
2231 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2232 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2233 | ||
0ffa9e8d | 2234 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2235 | } |
a73105b8 AQ |
2236 | rcu_read_unlock(); |
2237 | } | |
2238 | ||
ced72933 | 2239 | return crc; |
a73105b8 AQ |
2240 | } |
2241 | ||
56303d34 | 2242 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2243 | { |
7c26a53b ML |
2244 | struct batadv_tt_req_node *node; |
2245 | struct hlist_node *safe; | |
a73105b8 | 2246 | |
807736f6 | 2247 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2248 | |
7c26a53b ML |
2249 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2250 | hlist_del_init(&node->list); | |
a73105b8 AQ |
2251 | kfree(node); |
2252 | } | |
2253 | ||
807736f6 | 2254 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2255 | } |
2256 | ||
56303d34 SE |
2257 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2258 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2259 | const void *tt_buff, |
6b5e971a | 2260 | u16 tt_buff_len) |
a73105b8 | 2261 | { |
a73105b8 | 2262 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2263 | * last OGM (the OGM could carry no changes) |
2264 | */ | |
a73105b8 AQ |
2265 | spin_lock_bh(&orig_node->tt_buff_lock); |
2266 | if (tt_buff_len > 0) { | |
2267 | kfree(orig_node->tt_buff); | |
2268 | orig_node->tt_buff_len = 0; | |
2269 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2270 | if (orig_node->tt_buff) { | |
2271 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2272 | orig_node->tt_buff_len = tt_buff_len; | |
2273 | } | |
2274 | } | |
2275 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2276 | } | |
2277 | ||
56303d34 | 2278 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2279 | { |
7c26a53b ML |
2280 | struct batadv_tt_req_node *node; |
2281 | struct hlist_node *safe; | |
a73105b8 | 2282 | |
807736f6 | 2283 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2284 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2285 | if (batadv_has_timed_out(node->issued_at, |
2286 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2287 | hlist_del_init(&node->list); |
a73105b8 AQ |
2288 | kfree(node); |
2289 | } | |
2290 | } | |
807736f6 | 2291 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2292 | } |
2293 | ||
383b8636 ML |
2294 | /** |
2295 | * batadv_tt_req_node_new - search and possibly create a tt_req_node object | |
2296 | * @bat_priv: the bat priv with all the soft interface information | |
2297 | * @orig_node: orig node this request is being issued for | |
2298 | * | |
62fe710f | 2299 | * Return: the pointer to the new tt_req_node struct if no request |
383b8636 | 2300 | * has already been issued for this orig_node, NULL otherwise. |
9cfc7bd6 | 2301 | */ |
56303d34 | 2302 | static struct batadv_tt_req_node * |
383b8636 | 2303 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2304 | struct batadv_orig_node *orig_node) |
a73105b8 | 2305 | { |
56303d34 | 2306 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2307 | |
807736f6 | 2308 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2309 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2310 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2311 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2312 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2313 | goto unlock; |
2314 | } | |
2315 | ||
2316 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2317 | if (!tt_req_node) | |
2318 | goto unlock; | |
2319 | ||
8fdd0153 | 2320 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2321 | tt_req_node->issued_at = jiffies; |
2322 | ||
7c26a53b | 2323 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2324 | unlock: |
807736f6 | 2325 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2326 | return tt_req_node; |
2327 | } | |
2328 | ||
335fbe0f ML |
2329 | /** |
2330 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2331 | * @entry_ptr: to be checked local tt entry | |
2332 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2333 | * | |
62fe710f | 2334 | * Return: 1 if the entry is a valid, 0 otherwise. |
335fbe0f ML |
2335 | */ |
2336 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2337 | { |
56303d34 | 2338 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2339 | |
acd34afa | 2340 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2341 | return 0; |
2342 | return 1; | |
2343 | } | |
2344 | ||
a513088d SE |
2345 | static int batadv_tt_global_valid(const void *entry_ptr, |
2346 | const void *data_ptr) | |
a73105b8 | 2347 | { |
56303d34 SE |
2348 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2349 | const struct batadv_tt_global_entry *tt_global_entry; | |
2350 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2351 | |
30cfd02b AQ |
2352 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2353 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2354 | return 0; |
2355 | ||
56303d34 SE |
2356 | tt_global_entry = container_of(tt_common_entry, |
2357 | struct batadv_tt_global_entry, | |
48100bac AQ |
2358 | common); |
2359 | ||
a513088d | 2360 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2361 | } |
2362 | ||
335fbe0f | 2363 | /** |
7ea7b4a1 AQ |
2364 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2365 | * specified tt hash | |
335fbe0f ML |
2366 | * @bat_priv: the bat priv with all the soft interface information |
2367 | * @hash: hash table containing the tt entries | |
2368 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2369 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2370 | * @valid_cb: function to filter tt change entries |
2371 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2372 | */ |
7ea7b4a1 AQ |
2373 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2374 | struct batadv_hashtable *hash, | |
6b5e971a | 2375 | void *tvlv_buff, u16 tt_len, |
7ea7b4a1 AQ |
2376 | int (*valid_cb)(const void *, const void *), |
2377 | void *cb_data) | |
a73105b8 | 2378 | { |
56303d34 | 2379 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2380 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2381 | struct hlist_head *head; |
6b5e971a SE |
2382 | u16 tt_tot, tt_num_entries = 0; |
2383 | u32 i; | |
a73105b8 | 2384 | |
298e6e68 | 2385 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2386 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2387 | |
2388 | rcu_read_lock(); | |
2389 | for (i = 0; i < hash->size; i++) { | |
2390 | head = &hash->table[i]; | |
2391 | ||
b67bfe0d | 2392 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2393 | head, hash_entry) { |
335fbe0f | 2394 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2395 | break; |
2396 | ||
48100bac | 2397 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2398 | continue; |
2399 | ||
8fdd0153 | 2400 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2401 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2402 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2403 | memset(tt_change->reserved, 0, |
2404 | sizeof(tt_change->reserved)); | |
a73105b8 | 2405 | |
335fbe0f | 2406 | tt_num_entries++; |
a73105b8 AQ |
2407 | tt_change++; |
2408 | } | |
2409 | } | |
2410 | rcu_read_unlock(); | |
7ea7b4a1 | 2411 | } |
a73105b8 | 2412 | |
7ea7b4a1 AQ |
2413 | /** |
2414 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2415 | * @orig_node: originator for which the CRCs have to be checked | |
2416 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2417 | * @num_vlan: number of tvlv VLAN entries | |
7ea7b4a1 | 2418 | * |
62fe710f | 2419 | * Return: true if all the received CRCs match the locally stored ones, false |
7ea7b4a1 AQ |
2420 | * otherwise |
2421 | */ | |
2422 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2423 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2424 | u16 num_vlan) |
7ea7b4a1 AQ |
2425 | { |
2426 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2427 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 2428 | int i, orig_num_vlan; |
6b5e971a | 2429 | u32 crc; |
7ea7b4a1 AQ |
2430 | |
2431 | /* check if each received CRC matches the locally stored one */ | |
2432 | for (i = 0; i < num_vlan; i++) { | |
2433 | tt_vlan_tmp = tt_vlan + i; | |
2434 | ||
2435 | /* if orig_node is a backbone node for this VLAN, don't check | |
2436 | * the CRC as we ignore all the global entries over it | |
2437 | */ | |
2438 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2439 | orig_node->orig, |
2440 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2441 | continue; |
2442 | ||
2443 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2444 | ntohs(tt_vlan_tmp->vid)); | |
2445 | if (!vlan) | |
2446 | return false; | |
2447 | ||
91c2b1a9 AQ |
2448 | crc = vlan->tt.crc; |
2449 | batadv_orig_node_vlan_free_ref(vlan); | |
2450 | ||
2451 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2452 | return false; |
2453 | } | |
2454 | ||
c169c59d SW |
2455 | /* check if any excess VLANs exist locally for the originator |
2456 | * which are not mentioned in the TVLV from the originator. | |
2457 | */ | |
2458 | rcu_read_lock(); | |
2459 | orig_num_vlan = 0; | |
2460 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
2461 | orig_num_vlan++; | |
2462 | rcu_read_unlock(); | |
2463 | ||
2464 | if (orig_num_vlan > num_vlan) | |
2465 | return false; | |
2466 | ||
7ea7b4a1 AQ |
2467 | return true; |
2468 | } | |
2469 | ||
2470 | /** | |
2471 | * batadv_tt_local_update_crc - update all the local CRCs | |
2472 | * @bat_priv: the bat priv with all the soft interface information | |
2473 | */ | |
2474 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2475 | { | |
2476 | struct batadv_softif_vlan *vlan; | |
2477 | ||
2478 | /* recompute the global CRC for each VLAN */ | |
2479 | rcu_read_lock(); | |
2480 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2481 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2482 | } | |
2483 | rcu_read_unlock(); | |
2484 | } | |
2485 | ||
2486 | /** | |
2487 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2488 | * @bat_priv: the bat priv with all the soft interface information | |
2489 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2490 | */ | |
2491 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2492 | struct batadv_orig_node *orig_node) | |
2493 | { | |
2494 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2495 | u32 crc; |
7ea7b4a1 AQ |
2496 | |
2497 | /* recompute the global CRC for each VLAN */ | |
2498 | rcu_read_lock(); | |
d0fa4f3f | 2499 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
2500 | /* if orig_node is a backbone node for this VLAN, don't compute |
2501 | * the CRC as we ignore all the global entries over it | |
2502 | */ | |
cfd4f757 AQ |
2503 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2504 | vlan->vid)) | |
7ea7b4a1 AQ |
2505 | continue; |
2506 | ||
2507 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2508 | vlan->tt.crc = crc; | |
2509 | } | |
2510 | rcu_read_unlock(); | |
a73105b8 AQ |
2511 | } |
2512 | ||
ced72933 AQ |
2513 | /** |
2514 | * batadv_send_tt_request - send a TT Request message to a given node | |
2515 | * @bat_priv: the bat priv with all the soft interface information | |
2516 | * @dst_orig_node: the destination of the message | |
2517 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2518 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2519 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2520 | * @full_table: ask for the entire translation table if true, while only for the |
2521 | * last TT diff otherwise | |
2522 | */ | |
56303d34 SE |
2523 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2524 | struct batadv_orig_node *dst_orig_node, | |
6b5e971a | 2525 | u8 ttvn, |
7ea7b4a1 | 2526 | struct batadv_tvlv_tt_vlan_data *tt_vlan, |
6b5e971a | 2527 | u16 num_vlan, bool full_table) |
a73105b8 | 2528 | { |
335fbe0f | 2529 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2530 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2531 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2532 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2533 | bool ret = false; |
7ea7b4a1 | 2534 | int i, size; |
a73105b8 | 2535 | |
e5d89254 | 2536 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2537 | if (!primary_if) |
2538 | goto out; | |
2539 | ||
2540 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2541 | * reply from the same orig_node yet |
2542 | */ | |
383b8636 | 2543 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
2544 | if (!tt_req_node) |
2545 | goto out; | |
2546 | ||
7ea7b4a1 AQ |
2547 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2548 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2549 | if (!tvlv_tt_data) |
a73105b8 AQ |
2550 | goto out; |
2551 | ||
335fbe0f ML |
2552 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2553 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2554 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2555 | ||
2556 | /* send all the CRCs within the request. This is needed by intermediate | |
2557 | * nodes to ensure they have the correct table before replying | |
2558 | */ | |
2559 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2560 | for (i = 0; i < num_vlan; i++) { | |
2561 | tt_vlan_req->vid = tt_vlan->vid; | |
2562 | tt_vlan_req->crc = tt_vlan->crc; | |
2563 | ||
2564 | tt_vlan_req++; | |
2565 | tt_vlan++; | |
2566 | } | |
a73105b8 AQ |
2567 | |
2568 | if (full_table) | |
335fbe0f | 2569 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2570 | |
bb351ba0 | 2571 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2572 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2573 | |
d69909d2 | 2574 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2575 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2576 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2577 | tvlv_tt_data, size); |
335fbe0f | 2578 | ret = true; |
a73105b8 AQ |
2579 | |
2580 | out: | |
a73105b8 | 2581 | if (primary_if) |
e5d89254 | 2582 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2583 | if (ret && tt_req_node) { |
807736f6 | 2584 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b ML |
2585 | /* hlist_del_init() verifies tt_req_node still is in the list */ |
2586 | hlist_del_init(&tt_req_node->list); | |
807736f6 | 2587 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2588 | kfree(tt_req_node); |
2589 | } | |
335fbe0f | 2590 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2591 | return ret; |
2592 | } | |
2593 | ||
335fbe0f ML |
2594 | /** |
2595 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2596 | * node's translation table | |
2597 | * @bat_priv: the bat priv with all the soft interface information | |
2598 | * @tt_data: tt data containing the tt request information | |
2599 | * @req_src: mac address of tt request sender | |
2600 | * @req_dst: mac address of tt request recipient | |
2601 | * | |
62fe710f | 2602 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2603 | */ |
2604 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2605 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2606 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2607 | { |
170173bf | 2608 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2609 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2610 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2611 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2612 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2613 | bool ret = false, full_table; |
6b5e971a SE |
2614 | u8 orig_ttvn, req_ttvn; |
2615 | u16 tvlv_len; | |
2616 | s32 tt_len; | |
a73105b8 | 2617 | |
39c75a51 | 2618 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2619 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 2620 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 2621 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
2622 | |
2623 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2624 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2625 | if (!req_dst_orig_node) |
2626 | goto out; | |
2627 | ||
335fbe0f | 2628 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2629 | if (!res_dst_orig_node) |
2630 | goto out; | |
2631 | ||
6b5e971a | 2632 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2633 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2634 | |
7ea7b4a1 | 2635 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2636 | /* this node doesn't have the requested data */ |
a73105b8 | 2637 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2638 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2639 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2640 | goto out; |
2641 | ||
015758d0 | 2642 | /* If the full table has been explicitly requested */ |
335fbe0f | 2643 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2644 | !req_dst_orig_node->tt_buff) |
2645 | full_table = true; | |
2646 | else | |
2647 | full_table = false; | |
2648 | ||
335fbe0f ML |
2649 | /* TT fragmentation hasn't been implemented yet, so send as many |
2650 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2651 | */ |
a73105b8 AQ |
2652 | if (!full_table) { |
2653 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2654 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2655 | |
7ea7b4a1 AQ |
2656 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2657 | &tvlv_tt_data, | |
2658 | &tt_change, | |
2659 | &tt_len); | |
2660 | if (!tt_len) | |
a73105b8 AQ |
2661 | goto unlock; |
2662 | ||
a73105b8 | 2663 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2664 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2665 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2666 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2667 | } else { | |
7ea7b4a1 AQ |
2668 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2669 | * in the initial part | |
2670 | */ | |
2671 | tt_len = -1; | |
2672 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2673 | &tvlv_tt_data, | |
2674 | &tt_change, | |
2675 | &tt_len); | |
2676 | if (!tt_len) | |
a73105b8 | 2677 | goto out; |
7ea7b4a1 AQ |
2678 | |
2679 | /* fill the rest of the tvlv with the real TT entries */ | |
2680 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2681 | tt_change, tt_len, | |
2682 | batadv_tt_global_valid, | |
2683 | req_dst_orig_node); | |
a73105b8 AQ |
2684 | } |
2685 | ||
a19d3d85 ML |
2686 | /* Don't send the response, if larger than fragmented packet. */ |
2687 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2688 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2689 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2690 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2691 | res_dst_orig_node->orig); | |
2692 | goto out; | |
2693 | } | |
2694 | ||
335fbe0f ML |
2695 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2696 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2697 | |
2698 | if (full_table) | |
335fbe0f | 2699 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2700 | |
39c75a51 | 2701 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2702 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2703 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2704 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2705 | |
d69909d2 | 2706 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2707 | |
335fbe0f | 2708 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2709 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2710 | tvlv_len); | |
e91ecfc6 | 2711 | |
335fbe0f | 2712 | ret = true; |
a73105b8 AQ |
2713 | goto out; |
2714 | ||
2715 | unlock: | |
2716 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2717 | ||
2718 | out: | |
2719 | if (res_dst_orig_node) | |
7d211efc | 2720 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2721 | if (req_dst_orig_node) |
7d211efc | 2722 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2723 | kfree(tvlv_tt_data); |
a73105b8 | 2724 | return ret; |
a73105b8 | 2725 | } |
96412690 | 2726 | |
335fbe0f ML |
2727 | /** |
2728 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2729 | * translation table | |
2730 | * @bat_priv: the bat priv with all the soft interface information | |
2731 | * @tt_data: tt data containing the tt request information | |
2732 | * @req_src: mac address of tt request sender | |
2733 | * | |
62fe710f | 2734 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2735 | */ |
2736 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2737 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2738 | u8 *req_src) |
a73105b8 | 2739 | { |
335fbe0f | 2740 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2741 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2742 | struct batadv_tvlv_tt_change *tt_change; |
2743 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
2744 | u8 my_ttvn, req_ttvn; |
2745 | u16 tvlv_len; | |
a73105b8 | 2746 | bool full_table; |
6b5e971a | 2747 | s32 tt_len; |
a73105b8 | 2748 | |
39c75a51 | 2749 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2750 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 2751 | req_src, tt_data->ttvn, |
a2f2b6cd | 2752 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2753 | |
a70a9aa9 | 2754 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2755 | |
6b5e971a | 2756 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2757 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2758 | |
335fbe0f | 2759 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2760 | if (!orig_node) |
2761 | goto out; | |
2762 | ||
e5d89254 | 2763 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2764 | if (!primary_if) |
2765 | goto out; | |
2766 | ||
2767 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2768 | * is too big send the whole local translation table |
2769 | */ | |
335fbe0f | 2770 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2771 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2772 | full_table = true; |
2773 | else | |
2774 | full_table = false; | |
2775 | ||
335fbe0f ML |
2776 | /* TT fragmentation hasn't been implemented yet, so send as many |
2777 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2778 | */ |
a73105b8 | 2779 | if (!full_table) { |
807736f6 | 2780 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2781 | |
7ea7b4a1 AQ |
2782 | tt_len = bat_priv->tt.last_changeset_len; |
2783 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2784 | &tvlv_tt_data, | |
2785 | &tt_change, | |
2786 | &tt_len); | |
2787 | if (!tt_len) | |
a73105b8 AQ |
2788 | goto unlock; |
2789 | ||
335fbe0f | 2790 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2791 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2792 | bat_priv->tt.last_changeset_len); |
2793 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2794 | } else { |
6b5e971a | 2795 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2796 | |
7ea7b4a1 AQ |
2797 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2798 | * in the initial part | |
2799 | */ | |
2800 | tt_len = -1; | |
2801 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2802 | &tvlv_tt_data, | |
2803 | &tt_change, | |
2804 | &tt_len); | |
2805 | if (!tt_len) | |
a73105b8 | 2806 | goto out; |
7ea7b4a1 AQ |
2807 | |
2808 | /* fill the rest of the tvlv with the real TT entries */ | |
2809 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2810 | tt_change, tt_len, | |
2811 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2812 | } |
2813 | ||
335fbe0f ML |
2814 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2815 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2816 | |
2817 | if (full_table) | |
335fbe0f | 2818 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2819 | |
39c75a51 | 2820 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2821 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2822 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2823 | |
d69909d2 | 2824 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2825 | |
335fbe0f | 2826 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2827 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2828 | tvlv_len); | |
335fbe0f | 2829 | |
a73105b8 AQ |
2830 | goto out; |
2831 | ||
2832 | unlock: | |
807736f6 | 2833 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2834 | out: |
a70a9aa9 | 2835 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2836 | if (orig_node) |
7d211efc | 2837 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2838 | if (primary_if) |
e5d89254 | 2839 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2840 | kfree(tvlv_tt_data); |
2841 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2842 | return true; |
2843 | } | |
2844 | ||
335fbe0f ML |
2845 | /** |
2846 | * batadv_send_tt_response - send reply to tt request | |
2847 | * @bat_priv: the bat priv with all the soft interface information | |
2848 | * @tt_data: tt data containing the tt request information | |
2849 | * @req_src: mac address of tt request sender | |
2850 | * @req_dst: mac address of tt request recipient | |
2851 | * | |
62fe710f | 2852 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2853 | */ |
2854 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2855 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2856 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2857 | { |
cfd4f757 | 2858 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2859 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
2860 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
2861 | req_dst); | |
a73105b8 AQ |
2862 | } |
2863 | ||
56303d34 SE |
2864 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2865 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2866 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 2867 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
2868 | { |
2869 | int i; | |
a513088d | 2870 | int roams; |
a73105b8 AQ |
2871 | |
2872 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2873 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2874 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2875 | batadv_tt_global_del(bat_priv, orig_node, |
2876 | (tt_change + i)->addr, | |
c018ad3d | 2877 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2878 | "tt removed by changes", |
2879 | roams); | |
08c36d3e | 2880 | } else { |
08c36d3e | 2881 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2882 | (tt_change + i)->addr, |
c018ad3d | 2883 | ntohs((tt_change + i)->vid), |
d4f44692 | 2884 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2885 | /* In case of problem while storing a |
2886 | * global_entry, we stop the updating | |
2887 | * procedure without committing the | |
2888 | * ttvn change. This will avoid to send | |
2889 | * corrupted data on tt_request | |
2890 | */ | |
2891 | return; | |
08c36d3e | 2892 | } |
a73105b8 | 2893 | } |
ac4eebd4 | 2894 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
2895 | } |
2896 | ||
56303d34 | 2897 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 2898 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
2899 | u8 ttvn, u8 *resp_src, |
2900 | u16 num_entries) | |
a73105b8 | 2901 | { |
170173bf | 2902 | struct batadv_orig_node *orig_node; |
a73105b8 | 2903 | |
335fbe0f | 2904 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2905 | if (!orig_node) |
2906 | goto out; | |
2907 | ||
2908 | /* Purge the old table first.. */ | |
95fb130d AQ |
2909 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2910 | "Received full table"); | |
a73105b8 | 2911 | |
7ea7b4a1 AQ |
2912 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2913 | ttvn); | |
a73105b8 AQ |
2914 | |
2915 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2916 | kfree(orig_node->tt_buff); | |
2917 | orig_node->tt_buff_len = 0; | |
2918 | orig_node->tt_buff = NULL; | |
2919 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2920 | ||
7ea7b4a1 | 2921 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2922 | |
2923 | out: | |
2924 | if (orig_node) | |
7d211efc | 2925 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2926 | } |
2927 | ||
56303d34 SE |
2928 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2929 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2930 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 2931 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2932 | { |
a513088d SE |
2933 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2934 | tt_num_changes, ttvn); | |
a73105b8 | 2935 | |
e8cf234a AQ |
2936 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2937 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2938 | atomic_set(&orig_node->last_ttvn, ttvn); |
2939 | } | |
2940 | ||
c018ad3d AQ |
2941 | /** |
2942 | * batadv_is_my_client - check if a client is served by the local node | |
2943 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 2944 | * @addr: the mac address of the client to check |
c018ad3d AQ |
2945 | * @vid: VLAN identifier |
2946 | * | |
62fe710f | 2947 | * Return: true if the client is served by this node, false otherwise. |
c018ad3d | 2948 | */ |
6b5e971a | 2949 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 2950 | unsigned short vid) |
a73105b8 | 2951 | { |
170173bf | 2952 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2953 | bool ret = false; |
a73105b8 | 2954 | |
c018ad3d | 2955 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2956 | if (!tt_local_entry) |
2957 | goto out; | |
058d0e26 | 2958 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2959 | * consistency purpose) |
2960 | */ | |
7c1fd91d AQ |
2961 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2962 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2963 | goto out; |
7683fdc1 AQ |
2964 | ret = true; |
2965 | out: | |
a73105b8 | 2966 | if (tt_local_entry) |
a513088d | 2967 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2968 | return ret; |
a73105b8 AQ |
2969 | } |
2970 | ||
335fbe0f ML |
2971 | /** |
2972 | * batadv_handle_tt_response - process incoming tt reply | |
2973 | * @bat_priv: the bat priv with all the soft interface information | |
2974 | * @tt_data: tt data containing the tt request information | |
2975 | * @resp_src: mac address of tt reply sender | |
2976 | * @num_entries: number of tt change entries appended to the tt data | |
2977 | */ | |
2978 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2979 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2980 | u8 *resp_src, u16 num_entries) |
a73105b8 | 2981 | { |
7c26a53b ML |
2982 | struct batadv_tt_req_node *node; |
2983 | struct hlist_node *safe; | |
56303d34 | 2984 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 2985 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
2986 | u8 *tvlv_ptr = (u8 *)tt_data; |
2987 | u16 change_offset; | |
a73105b8 | 2988 | |
39c75a51 | 2989 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2990 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 2991 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 2992 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2993 | |
335fbe0f | 2994 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2995 | if (!orig_node) |
2996 | goto out; | |
2997 | ||
a70a9aa9 AQ |
2998 | spin_lock_bh(&orig_node->tt_lock); |
2999 | ||
7ea7b4a1 AQ |
3000 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
3001 | change_offset *= ntohs(tt_data->num_vlan); | |
3002 | change_offset += sizeof(*tt_data); | |
3003 | tvlv_ptr += change_offset; | |
3004 | ||
3005 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 3006 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
3007 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3008 | resp_src, num_entries); | |
96412690 | 3009 | } else { |
335fbe0f ML |
3010 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3011 | tt_data->ttvn, tt_change); | |
96412690 | 3012 | } |
a73105b8 | 3013 | |
a70a9aa9 | 3014 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3015 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3016 | |
3017 | spin_unlock_bh(&orig_node->tt_lock); | |
3018 | ||
a73105b8 | 3019 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3020 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3021 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3022 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3023 | continue; |
7c26a53b | 3024 | hlist_del_init(&node->list); |
a73105b8 AQ |
3025 | kfree(node); |
3026 | } | |
7ea7b4a1 | 3027 | |
807736f6 | 3028 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3029 | out: |
3030 | if (orig_node) | |
7d211efc | 3031 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
3032 | } |
3033 | ||
56303d34 | 3034 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3035 | { |
56303d34 | 3036 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3037 | |
807736f6 | 3038 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3039 | |
807736f6 | 3040 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
3041 | list_del(&node->list); |
3042 | kfree(node); | |
3043 | } | |
3044 | ||
807736f6 | 3045 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3046 | } |
3047 | ||
56303d34 | 3048 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3049 | { |
56303d34 | 3050 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3051 | |
807736f6 SE |
3052 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3053 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3054 | if (!batadv_has_timed_out(node->first_time, |
3055 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3056 | continue; |
3057 | ||
3058 | list_del(&node->list); | |
3059 | kfree(node); | |
3060 | } | |
807736f6 | 3061 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3062 | } |
3063 | ||
62fe710f SE |
3064 | /** |
3065 | * batadv_tt_check_roam_count | |
3066 | * | |
3067 | * This function checks whether the client already reached the | |
cc47f66e AQ |
3068 | * maximum number of possible roaming phases. In this case the ROAMING_ADV |
3069 | * will not be sent. | |
3070 | * | |
62fe710f | 3071 | * Return: true if the ROAMING_ADV can be sent, false otherwise |
9cfc7bd6 | 3072 | */ |
6b5e971a | 3073 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3074 | { |
56303d34 | 3075 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3076 | bool ret = false; |
3077 | ||
807736f6 | 3078 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3079 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3080 | * reply from the same orig_node yet |
3081 | */ | |
807736f6 | 3082 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3083 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3084 | continue; |
3085 | ||
1eda58bf | 3086 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3087 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3088 | continue; |
3089 | ||
3e34819e | 3090 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3091 | /* Sorry, you roamed too many times! */ |
3092 | goto unlock; | |
3093 | ret = true; | |
3094 | break; | |
3095 | } | |
3096 | ||
3097 | if (!ret) { | |
3098 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
3099 | if (!tt_roam_node) | |
3100 | goto unlock; | |
3101 | ||
3102 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3103 | atomic_set(&tt_roam_node->counter, |
3104 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3105 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3106 | |
807736f6 | 3107 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3108 | ret = true; |
3109 | } | |
3110 | ||
3111 | unlock: | |
807736f6 | 3112 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3113 | return ret; |
3114 | } | |
3115 | ||
c018ad3d AQ |
3116 | /** |
3117 | * batadv_send_roam_adv - send a roaming advertisement message | |
3118 | * @bat_priv: the bat priv with all the soft interface information | |
3119 | * @client: mac address of the roaming client | |
3120 | * @vid: VLAN identifier | |
3121 | * @orig_node: message destination | |
3122 | * | |
3123 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3124 | * client. This is done to inform the node that from now on all traffic destined | |
3125 | * for this particular roamed client has to be forwarded to the sender of the | |
3126 | * roaming message. | |
3127 | */ | |
6b5e971a | 3128 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3129 | unsigned short vid, |
56303d34 | 3130 | struct batadv_orig_node *orig_node) |
cc47f66e | 3131 | { |
56303d34 | 3132 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3133 | struct batadv_tvlv_roam_adv tvlv_roam; |
3134 | ||
3135 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3136 | if (!primary_if) | |
3137 | goto out; | |
cc47f66e AQ |
3138 | |
3139 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3140 | * already roamed to us too many times |
3141 | */ | |
a513088d | 3142 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3143 | goto out; |
3144 | ||
39c75a51 | 3145 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3146 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3147 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3148 | |
d69909d2 | 3149 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3150 | |
122edaa0 | 3151 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3152 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3153 | |
3154 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3155 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3156 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3157 | |
3158 | out: | |
122edaa0 ML |
3159 | if (primary_if) |
3160 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
3161 | } |
3162 | ||
a513088d | 3163 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3164 | { |
56303d34 | 3165 | struct delayed_work *delayed_work; |
807736f6 | 3166 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3167 | struct batadv_priv *bat_priv; |
3168 | ||
3169 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3170 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3171 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3172 | |
a19d3d85 | 3173 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3174 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3175 | batadv_tt_req_purge(bat_priv); |
3176 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3177 | |
72414442 AQ |
3178 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3179 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3180 | } |
cc47f66e | 3181 | |
56303d34 | 3182 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3183 | { |
e1bf0c14 ML |
3184 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3185 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3186 | ||
807736f6 | 3187 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3188 | |
a513088d SE |
3189 | batadv_tt_local_table_free(bat_priv); |
3190 | batadv_tt_global_table_free(bat_priv); | |
3191 | batadv_tt_req_list_free(bat_priv); | |
3192 | batadv_tt_changes_list_free(bat_priv); | |
3193 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3194 | |
807736f6 | 3195 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3196 | } |
058d0e26 | 3197 | |
7ea7b4a1 AQ |
3198 | /** |
3199 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3200 | * table and possibly count them in the TT size | |
3201 | * @bat_priv: the bat priv with all the soft interface information | |
3202 | * @flags: the flag to switch | |
3203 | * @enable: whether to set or unset the flag | |
3204 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3205 | */ |
6b5e971a SE |
3206 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3207 | bool enable, bool count) | |
058d0e26 | 3208 | { |
7ea7b4a1 AQ |
3209 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3210 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 3211 | u16 changed_num = 0; |
058d0e26 | 3212 | struct hlist_head *head; |
6b5e971a | 3213 | u32 i; |
058d0e26 AQ |
3214 | |
3215 | if (!hash) | |
7ea7b4a1 | 3216 | return; |
058d0e26 AQ |
3217 | |
3218 | for (i = 0; i < hash->size; i++) { | |
3219 | head = &hash->table[i]; | |
3220 | ||
3221 | rcu_read_lock(); | |
b67bfe0d | 3222 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3223 | head, hash_entry) { |
697f2531 AQ |
3224 | if (enable) { |
3225 | if ((tt_common_entry->flags & flags) == flags) | |
3226 | continue; | |
3227 | tt_common_entry->flags |= flags; | |
3228 | } else { | |
3229 | if (!(tt_common_entry->flags & flags)) | |
3230 | continue; | |
3231 | tt_common_entry->flags &= ~flags; | |
3232 | } | |
3233 | changed_num++; | |
7ea7b4a1 AQ |
3234 | |
3235 | if (!count) | |
3236 | continue; | |
3237 | ||
3238 | batadv_tt_local_size_inc(bat_priv, | |
3239 | tt_common_entry->vid); | |
058d0e26 AQ |
3240 | } |
3241 | rcu_read_unlock(); | |
3242 | } | |
058d0e26 AQ |
3243 | } |
3244 | ||
acd34afa | 3245 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3246 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3247 | { |
807736f6 | 3248 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3249 | struct batadv_tt_common_entry *tt_common; |
3250 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 3251 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 3252 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3253 | struct hlist_head *head; |
3254 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3255 | u32 i; |
058d0e26 AQ |
3256 | |
3257 | if (!hash) | |
3258 | return; | |
3259 | ||
3260 | for (i = 0; i < hash->size; i++) { | |
3261 | head = &hash->table[i]; | |
3262 | list_lock = &hash->list_locks[i]; | |
3263 | ||
3264 | spin_lock_bh(list_lock); | |
b67bfe0d | 3265 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3266 | hash_entry) { |
3267 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3268 | continue; |
3269 | ||
39c75a51 | 3270 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3271 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3272 | tt_common->addr, | |
3273 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3274 | |
7ea7b4a1 | 3275 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3276 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3277 | tt_local = container_of(tt_common, |
3278 | struct batadv_tt_local_entry, | |
3279 | common); | |
35df3b29 AQ |
3280 | |
3281 | /* decrease the reference held for this vlan */ | |
3282 | vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid); | |
354136bc ML |
3283 | if (vlan) { |
3284 | batadv_softif_vlan_free_ref(vlan); | |
3285 | batadv_softif_vlan_free_ref(vlan); | |
3286 | } | |
35df3b29 | 3287 | |
56303d34 | 3288 | batadv_tt_local_entry_free_ref(tt_local); |
058d0e26 AQ |
3289 | } |
3290 | spin_unlock_bh(list_lock); | |
3291 | } | |
058d0e26 AQ |
3292 | } |
3293 | ||
e1bf0c14 | 3294 | /** |
a19d3d85 ML |
3295 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3296 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3297 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3298 | * |
3299 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3300 | */ |
a19d3d85 | 3301 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3302 | { |
5274cd68 SE |
3303 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3304 | ||
c5caf4ef LL |
3305 | /* Update multicast addresses in local translation table */ |
3306 | batadv_mcast_mla_update(bat_priv); | |
3307 | ||
e1bf0c14 ML |
3308 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3309 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3310 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3311 | return; |
e1bf0c14 | 3312 | } |
be9aa4c1 | 3313 | |
7ea7b4a1 | 3314 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3315 | |
a513088d | 3316 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3317 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3318 | |
3319 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3320 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3321 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3322 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3323 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3324 | |
3325 | /* reset the sending counter */ | |
807736f6 | 3326 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3327 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3328 | } |
a70a9aa9 | 3329 | |
a19d3d85 ML |
3330 | /** |
3331 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3332 | * have been queued in the time since the last commit | |
3333 | * @bat_priv: the bat priv with all the soft interface information | |
3334 | */ | |
3335 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3336 | { | |
3337 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3338 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3339 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3340 | } |
59b699cd | 3341 | |
6b5e971a SE |
3342 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3343 | unsigned short vid) | |
59b699cd | 3344 | { |
56303d34 SE |
3345 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3346 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3347 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3348 | bool ret = false; |
59b699cd | 3349 | |
b8cbd81d | 3350 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3351 | if (!vlan) |
3352 | return false; | |
3353 | ||
3354 | if (!atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3355 | goto out; |
59b699cd | 3356 | |
b8cbd81d | 3357 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3358 | if (!tt_local_entry) |
3359 | goto out; | |
3360 | ||
b8cbd81d | 3361 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3362 | if (!tt_global_entry) |
3363 | goto out; | |
3364 | ||
1f129fef | 3365 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3366 | goto out; |
3367 | ||
5870adc6 | 3368 | ret = true; |
59b699cd AQ |
3369 | |
3370 | out: | |
f75a33ae | 3371 | batadv_softif_vlan_free_ref(vlan); |
59b699cd | 3372 | if (tt_global_entry) |
a513088d | 3373 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3374 | if (tt_local_entry) |
a513088d | 3375 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3376 | return ret; |
3377 | } | |
a943cac1 | 3378 | |
e1bf0c14 ML |
3379 | /** |
3380 | * batadv_tt_update_orig - update global translation table with new tt | |
3381 | * information received via ogms | |
3382 | * @bat_priv: the bat priv with all the soft interface information | |
e51f0397 SE |
3383 | * @orig_node: the orig_node of the ogm |
3384 | * @tt_buff: pointer to the first tvlv VLAN entry | |
7ea7b4a1 AQ |
3385 | * @tt_num_vlan: number of tvlv VLAN entries |
3386 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3387 | * @tt_num_changes: number of tt changes inside the tt buffer |
3388 | * @ttvn: translation table version number of this changeset | |
e1bf0c14 ML |
3389 | */ |
3390 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3391 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3392 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3393 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3394 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3395 | { |
6b5e971a | 3396 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3397 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3398 | bool full_table = true; |
e17931d1 | 3399 | bool has_tt_init; |
a943cac1 | 3400 | |
7ea7b4a1 | 3401 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3402 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3403 | &orig_node->capa_initialized); | |
e17931d1 | 3404 | |
17071578 | 3405 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3406 | * increased by one -> we can apply the attached changes |
3407 | */ | |
e17931d1 | 3408 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3409 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3410 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3411 | * times. | |
9cfc7bd6 SE |
3412 | * In this case send a tt request |
3413 | */ | |
a943cac1 ML |
3414 | if (!tt_num_changes) { |
3415 | full_table = false; | |
3416 | goto request_table; | |
3417 | } | |
3418 | ||
a70a9aa9 AQ |
3419 | spin_lock_bh(&orig_node->tt_lock); |
3420 | ||
a513088d | 3421 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3422 | ttvn, tt_change); |
a943cac1 ML |
3423 | |
3424 | /* Even if we received the precomputed crc with the OGM, we | |
3425 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3426 | * in the global table |
3427 | */ | |
7ea7b4a1 | 3428 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3429 | |
a70a9aa9 AQ |
3430 | spin_unlock_bh(&orig_node->tt_lock); |
3431 | ||
a943cac1 ML |
3432 | /* The ttvn alone is not enough to guarantee consistency |
3433 | * because a single value could represent different states | |
3434 | * (due to the wrap around). Thus a node has to check whether | |
3435 | * the resulting table (after applying the changes) is still | |
3436 | * consistent or not. E.g. a node could disconnect while its | |
3437 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3438 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3439 | * inconsistency |
3440 | */ | |
7ea7b4a1 AQ |
3441 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3442 | tt_num_vlan)) | |
a943cac1 | 3443 | goto request_table; |
a943cac1 ML |
3444 | } else { |
3445 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3446 | * in sync anymore -> request fresh tt data |
3447 | */ | |
e17931d1 | 3448 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3449 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3450 | tt_num_vlan)) { | |
a943cac1 | 3451 | request_table: |
39c75a51 | 3452 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3453 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3454 | orig_node->orig, ttvn, orig_ttvn, | |
3455 | tt_num_changes); | |
a513088d | 3456 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3457 | tt_vlan, tt_num_vlan, |
3458 | full_table); | |
a943cac1 ML |
3459 | return; |
3460 | } | |
3461 | } | |
3462 | } | |
3275e7cc | 3463 | |
c018ad3d AQ |
3464 | /** |
3465 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3466 | * @bat_priv: the bat priv with all the soft interface information | |
3467 | * @addr: the mac address of the client to check | |
3468 | * @vid: VLAN identifier | |
3469 | * | |
62fe710f | 3470 | * Return: true if we know that the client has moved from its old originator |
c018ad3d AQ |
3471 | * to another one. This entry is still kept for consistency purposes and will be |
3472 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3473 | */ |
56303d34 | 3474 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 3475 | u8 *addr, unsigned short vid) |
3275e7cc | 3476 | { |
56303d34 | 3477 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3478 | bool ret = false; |
3479 | ||
c018ad3d | 3480 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3481 | if (!tt_global_entry) |
3482 | goto out; | |
3483 | ||
c1d07431 | 3484 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3485 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3486 | out: |
3487 | return ret; | |
3488 | } | |
30cfd02b | 3489 | |
7c1fd91d AQ |
3490 | /** |
3491 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3492 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3493 | * @addr: the mac address of the local client to query |
3494 | * @vid: VLAN identifier | |
7c1fd91d | 3495 | * |
62fe710f | 3496 | * Return: true if the local client is known to be roaming (it is not served by |
7c1fd91d AQ |
3497 | * this node anymore) or not. If yes, the client is still present in the table |
3498 | * to keep the latter consistent with the node TTVN | |
3499 | */ | |
3500 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 3501 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
3502 | { |
3503 | struct batadv_tt_local_entry *tt_local_entry; | |
3504 | bool ret = false; | |
3505 | ||
c018ad3d | 3506 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3507 | if (!tt_local_entry) |
3508 | goto out; | |
3509 | ||
3510 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3511 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3512 | out: | |
3513 | return ret; | |
7c1fd91d AQ |
3514 | } |
3515 | ||
30cfd02b AQ |
3516 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3517 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3518 | const unsigned char *addr, |
16052789 | 3519 | unsigned short vid) |
30cfd02b AQ |
3520 | { |
3521 | bool ret = false; | |
3522 | ||
16052789 | 3523 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3524 | BATADV_TT_CLIENT_TEMP, |
3525 | atomic_read(&orig_node->last_ttvn))) | |
3526 | goto out; | |
3527 | ||
3528 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3529 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3530 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3531 | ret = true; |
3532 | out: | |
3533 | return ret; | |
3534 | } | |
e1bf0c14 | 3535 | |
a19d3d85 ML |
3536 | /** |
3537 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3538 | * maximum packet size that can be transported through the mesh | |
3539 | * @soft_iface: netdev struct of the mesh interface | |
3540 | * | |
3541 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3542 | * to be removed. | |
3543 | */ | |
3544 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3545 | { | |
3546 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3547 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3548 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3549 | bool reduced = false; | |
3550 | ||
3551 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3552 | ||
3553 | while (true) { | |
3554 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3555 | if (packet_size_max >= table_size) | |
3556 | break; | |
3557 | ||
3558 | batadv_tt_local_purge(bat_priv, timeout); | |
3559 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3560 | ||
3561 | timeout /= 2; | |
3562 | reduced = true; | |
3563 | net_ratelimited_function(batadv_info, soft_iface, | |
3564 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3565 | packet_size_max); | |
3566 | } | |
3567 | ||
3568 | /* commit these changes immediately, to avoid synchronization problem | |
3569 | * with the TTVN | |
3570 | */ | |
3571 | if (reduced) | |
3572 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3573 | ||
3574 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3575 | } | |
3576 | ||
e1bf0c14 ML |
3577 | /** |
3578 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3579 | * @bat_priv: the bat priv with all the soft interface information | |
3580 | * @orig: the orig_node of the ogm | |
3581 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3582 | * @tvlv_value: tvlv buffer containing the gateway data | |
3583 | * @tvlv_value_len: tvlv buffer length | |
3584 | */ | |
3585 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3586 | struct batadv_orig_node *orig, | |
6b5e971a SE |
3587 | u8 flags, void *tvlv_value, |
3588 | u16 tvlv_value_len) | |
e1bf0c14 | 3589 | { |
7ea7b4a1 AQ |
3590 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3591 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3592 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 3593 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
3594 | |
3595 | if (tvlv_value_len < sizeof(*tt_data)) | |
3596 | return; | |
3597 | ||
3598 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3599 | tvlv_value_len -= sizeof(*tt_data); | |
3600 | ||
7ea7b4a1 AQ |
3601 | num_vlan = ntohs(tt_data->num_vlan); |
3602 | ||
3603 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3604 | return; | |
3605 | ||
3606 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3607 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3608 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3609 | ||
298e6e68 | 3610 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3611 | |
7ea7b4a1 AQ |
3612 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3613 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3614 | } |
3615 | ||
335fbe0f ML |
3616 | /** |
3617 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3618 | * container | |
3619 | * @bat_priv: the bat priv with all the soft interface information | |
3620 | * @src: mac address of tt tvlv sender | |
3621 | * @dst: mac address of tt tvlv recipient | |
3622 | * @tvlv_value: tvlv buffer containing the tt data | |
3623 | * @tvlv_value_len: tvlv buffer length | |
3624 | * | |
62fe710f | 3625 | * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS |
335fbe0f ML |
3626 | * otherwise. |
3627 | */ | |
3628 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3629 | u8 *src, u8 *dst, |
335fbe0f | 3630 | void *tvlv_value, |
6b5e971a | 3631 | u16 tvlv_value_len) |
335fbe0f ML |
3632 | { |
3633 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 3634 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3635 | char tt_flag; |
3636 | bool ret; | |
3637 | ||
3638 | if (tvlv_value_len < sizeof(*tt_data)) | |
3639 | return NET_RX_SUCCESS; | |
3640 | ||
3641 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3642 | tvlv_value_len -= sizeof(*tt_data); | |
3643 | ||
7ea7b4a1 AQ |
3644 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3645 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3646 | ||
3647 | if (tvlv_value_len < tt_vlan_len) | |
3648 | return NET_RX_SUCCESS; | |
3649 | ||
3650 | tvlv_value_len -= tt_vlan_len; | |
3651 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3652 | |
3653 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3654 | case BATADV_TT_REQUEST: | |
3655 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3656 | ||
3657 | /* If this node cannot provide a TT response the tt_request is | |
3658 | * forwarded | |
3659 | */ | |
3660 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3661 | if (!ret) { | |
3662 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3663 | tt_flag = 'F'; | |
3664 | else | |
3665 | tt_flag = '.'; | |
3666 | ||
3667 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3668 | "Routing TT_REQUEST to %pM [%c]\n", | |
3669 | dst, tt_flag); | |
3670 | /* tvlv API will re-route the packet */ | |
3671 | return NET_RX_DROP; | |
3672 | } | |
3673 | break; | |
3674 | case BATADV_TT_RESPONSE: | |
3675 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3676 | ||
3677 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3678 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3679 | src, tt_num_entries); |
335fbe0f ML |
3680 | return NET_RX_SUCCESS; |
3681 | } | |
3682 | ||
3683 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3684 | tt_flag = 'F'; | |
3685 | else | |
3686 | tt_flag = '.'; | |
3687 | ||
3688 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3689 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3690 | ||
3691 | /* tvlv API will re-route the packet */ | |
3692 | return NET_RX_DROP; | |
3693 | } | |
3694 | ||
3695 | return NET_RX_SUCCESS; | |
3696 | } | |
3697 | ||
122edaa0 ML |
3698 | /** |
3699 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3700 | * @bat_priv: the bat priv with all the soft interface information | |
3701 | * @src: mac address of tt tvlv sender | |
3702 | * @dst: mac address of tt tvlv recipient | |
3703 | * @tvlv_value: tvlv buffer containing the tt data | |
3704 | * @tvlv_value_len: tvlv buffer length | |
3705 | * | |
62fe710f | 3706 | * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS |
122edaa0 ML |
3707 | * otherwise. |
3708 | */ | |
3709 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3710 | u8 *src, u8 *dst, |
122edaa0 | 3711 | void *tvlv_value, |
6b5e971a | 3712 | u16 tvlv_value_len) |
122edaa0 ML |
3713 | { |
3714 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3715 | struct batadv_orig_node *orig_node = NULL; | |
3716 | ||
3717 | /* If this node is not the intended recipient of the | |
3718 | * roaming advertisement the packet is forwarded | |
3719 | * (the tvlv API will re-route the packet). | |
3720 | */ | |
3721 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3722 | return NET_RX_DROP; | |
3723 | ||
122edaa0 ML |
3724 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3725 | goto out; | |
3726 | ||
3727 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3728 | if (!orig_node) | |
3729 | goto out; | |
3730 | ||
3731 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3732 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3733 | ||
3734 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3735 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3736 | src, roaming_adv->client); | |
3737 | ||
3738 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3739 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3740 | atomic_read(&orig_node->last_ttvn) + 1); |
3741 | ||
3742 | out: | |
3743 | if (orig_node) | |
3744 | batadv_orig_node_free_ref(orig_node); | |
3745 | return NET_RX_SUCCESS; | |
3746 | } | |
3747 | ||
e1bf0c14 ML |
3748 | /** |
3749 | * batadv_tt_init - initialise the translation table internals | |
3750 | * @bat_priv: the bat priv with all the soft interface information | |
3751 | * | |
62fe710f | 3752 | * Return: 0 on success or negative error number in case of failure. |
e1bf0c14 ML |
3753 | */ |
3754 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3755 | { | |
3756 | int ret; | |
3757 | ||
0eb01568 AQ |
3758 | /* synchronized flags must be remote */ |
3759 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3760 | ||
e1bf0c14 ML |
3761 | ret = batadv_tt_local_init(bat_priv); |
3762 | if (ret < 0) | |
3763 | return ret; | |
3764 | ||
3765 | ret = batadv_tt_global_init(bat_priv); | |
3766 | if (ret < 0) | |
3767 | return ret; | |
3768 | ||
3769 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3770 | batadv_tt_tvlv_unicast_handler_v1, |
3771 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3772 | |
122edaa0 ML |
3773 | batadv_tvlv_handler_register(bat_priv, NULL, |
3774 | batadv_roam_tvlv_unicast_handler_v1, | |
3775 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3776 | ||
e1bf0c14 ML |
3777 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3778 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3779 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3780 | ||
3781 | return 1; | |
3782 | } | |
42cb0bef AQ |
3783 | |
3784 | /** | |
3785 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3786 | * @bat_priv: the bat priv with all the soft interface information | |
3787 | * @addr: the mac address of the client | |
3788 | * @vid: the identifier of the VLAN where this client is connected | |
3789 | * | |
62fe710f | 3790 | * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false |
42cb0bef AQ |
3791 | * otherwise |
3792 | */ | |
3793 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 3794 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
3795 | { |
3796 | struct batadv_tt_global_entry *tt; | |
3797 | bool ret; | |
3798 | ||
3799 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3800 | if (!tt) | |
3801 | return false; | |
3802 | ||
3803 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3804 | ||
3805 | batadv_tt_global_entry_free_ref(tt); | |
3806 | ||
3807 | return ret; | |
3808 | } |