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0046b040 | 1 | /* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
c6c8fea2 | 18 | #include "translation-table.h" |
1e2c2a4f SE |
19 | #include "main.h" |
20 | ||
21 | #include <linux/atomic.h> | |
ac4eebd4 | 22 | #include <linux/bitops.h> |
1e2c2a4f SE |
23 | #include <linux/bug.h> |
24 | #include <linux/byteorder/generic.h> | |
25 | #include <linux/compiler.h> | |
26 | #include <linux/crc32c.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/jhash.h> | |
32 | #include <linux/jiffies.h> | |
33 | #include <linux/kernel.h> | |
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 | 71 | /** |
d15cd622 AQ |
72 | * batadv_compare_tt - check if two TT entries are the same |
73 | * @node: the list element pointer of the first TT entry | |
74 | * @data2: pointer to the tt_common_entry of the second TT entry | |
62fe710f | 75 | * |
d15cd622 AQ |
76 | * Compare the MAC address and the VLAN ID of the two TT entries and check if |
77 | * they are the same TT client. | |
78 | * Return: 1 if the two TT clients are the same, 0 otherwise | |
62fe710f | 79 | */ |
a513088d | 80 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 81 | { |
56303d34 | 82 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 83 | hash_entry); |
4c718958 ML |
84 | const struct batadv_tt_common_entry *tt1 = data1; |
85 | const struct batadv_tt_common_entry *tt2 = data2; | |
7aadf889 | 86 | |
4c718958 | 87 | return (tt1->vid == tt2->vid) && batadv_compare_eth(data1, data2); |
7aadf889 ML |
88 | } |
89 | ||
c018ad3d AQ |
90 | /** |
91 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
92 | * @data: pointer to the tt_common_entry object to map | |
93 | * @size: the size of the hash table | |
94 | * | |
62fe710f | 95 | * Return: the hash index where the object represented by 'data' should be |
c018ad3d AQ |
96 | * stored at. |
97 | */ | |
6b5e971a | 98 | static inline u32 batadv_choose_tt(const void *data, u32 size) |
c018ad3d AQ |
99 | { |
100 | struct batadv_tt_common_entry *tt; | |
6b5e971a | 101 | u32 hash = 0; |
c018ad3d AQ |
102 | |
103 | tt = (struct batadv_tt_common_entry *)data; | |
36fd61cb SE |
104 | hash = jhash(&tt->addr, ETH_ALEN, hash); |
105 | hash = jhash(&tt->vid, sizeof(tt->vid), hash); | |
c018ad3d AQ |
106 | |
107 | return hash % size; | |
108 | } | |
109 | ||
110 | /** | |
111 | * batadv_tt_hash_find - look for a client in the given hash table | |
112 | * @hash: the hash table to search | |
113 | * @addr: the mac address of the client to look for | |
114 | * @vid: VLAN identifier | |
115 | * | |
62fe710f | 116 | * Return: a pointer to the tt_common struct belonging to the searched client if |
c018ad3d AQ |
117 | * found, NULL otherwise. |
118 | */ | |
56303d34 | 119 | static struct batadv_tt_common_entry * |
6b5e971a | 120 | batadv_tt_hash_find(struct batadv_hashtable *hash, const u8 *addr, |
c018ad3d | 121 | unsigned short vid) |
7aadf889 | 122 | { |
7aadf889 | 123 | struct hlist_head *head; |
c018ad3d | 124 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
6b5e971a | 125 | u32 index; |
7aadf889 ML |
126 | |
127 | if (!hash) | |
128 | return NULL; | |
129 | ||
8fdd0153 | 130 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
131 | to_search.vid = vid; |
132 | ||
133 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
134 | head = &hash->table[index]; |
135 | ||
136 | rcu_read_lock(); | |
c018ad3d AQ |
137 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
138 | if (!batadv_compare_eth(tt, addr)) | |
139 | continue; | |
140 | ||
141 | if (tt->vid != vid) | |
7aadf889 ML |
142 | continue; |
143 | ||
c018ad3d | 144 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
145 | continue; |
146 | ||
c018ad3d | 147 | tt_tmp = tt; |
7aadf889 ML |
148 | break; |
149 | } | |
150 | rcu_read_unlock(); | |
151 | ||
c018ad3d | 152 | return tt_tmp; |
7aadf889 ML |
153 | } |
154 | ||
c018ad3d AQ |
155 | /** |
156 | * batadv_tt_local_hash_find - search the local table for a given client | |
157 | * @bat_priv: the bat priv with all the soft interface information | |
158 | * @addr: the mac address of the client to look for | |
159 | * @vid: VLAN identifier | |
160 | * | |
62fe710f | 161 | * Return: a pointer to the corresponding tt_local_entry struct if the client is |
c018ad3d AQ |
162 | * found, NULL otherwise. |
163 | */ | |
56303d34 | 164 | static struct batadv_tt_local_entry * |
6b5e971a | 165 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 166 | unsigned short vid) |
7aadf889 | 167 | { |
56303d34 SE |
168 | struct batadv_tt_common_entry *tt_common_entry; |
169 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 170 | |
c018ad3d AQ |
171 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
172 | vid); | |
48100bac AQ |
173 | if (tt_common_entry) |
174 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
175 | struct batadv_tt_local_entry, |
176 | common); | |
48100bac AQ |
177 | return tt_local_entry; |
178 | } | |
7aadf889 | 179 | |
c018ad3d AQ |
180 | /** |
181 | * batadv_tt_global_hash_find - search the global table for a given client | |
182 | * @bat_priv: the bat priv with all the soft interface information | |
183 | * @addr: the mac address of the client to look for | |
184 | * @vid: VLAN identifier | |
185 | * | |
62fe710f | 186 | * Return: a pointer to the corresponding tt_global_entry struct if the client |
c018ad3d AQ |
187 | * is found, NULL otherwise. |
188 | */ | |
56303d34 | 189 | static struct batadv_tt_global_entry * |
6b5e971a | 190 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 191 | unsigned short vid) |
48100bac | 192 | { |
56303d34 SE |
193 | struct batadv_tt_common_entry *tt_common_entry; |
194 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 195 | |
c018ad3d AQ |
196 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
197 | vid); | |
48100bac AQ |
198 | if (tt_common_entry) |
199 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
200 | struct batadv_tt_global_entry, |
201 | common); | |
48100bac | 202 | return tt_global_entry; |
7aadf889 ML |
203 | } |
204 | ||
a513088d | 205 | static void |
56303d34 | 206 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 207 | { |
48100bac AQ |
208 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
209 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
210 | } |
211 | ||
21026059 AQ |
212 | /** |
213 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
214 | * tt_global_entry and possibly free it | |
215 | * @tt_global_entry: the object to free | |
216 | */ | |
a513088d | 217 | static void |
56303d34 | 218 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 219 | { |
db08e6e5 | 220 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 221 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 222 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
223 | } |
224 | } | |
225 | ||
1d8ab8d3 LL |
226 | /** |
227 | * batadv_tt_global_hash_count - count the number of orig entries | |
d15cd622 | 228 | * @bat_priv: the bat priv with all the soft interface information |
1d8ab8d3 LL |
229 | * @addr: the mac address of the client to count entries for |
230 | * @vid: VLAN identifier | |
231 | * | |
62fe710f | 232 | * Return: the number of originators advertising the given address/data |
1d8ab8d3 LL |
233 | * (excluding ourself). |
234 | */ | |
235 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
6b5e971a | 236 | const u8 *addr, unsigned short vid) |
1d8ab8d3 LL |
237 | { |
238 | struct batadv_tt_global_entry *tt_global_entry; | |
239 | int count; | |
240 | ||
241 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
242 | if (!tt_global_entry) | |
243 | return 0; | |
244 | ||
245 | count = atomic_read(&tt_global_entry->orig_list_count); | |
246 | batadv_tt_global_entry_free_ref(tt_global_entry); | |
247 | ||
248 | return count; | |
249 | } | |
250 | ||
7ea7b4a1 AQ |
251 | /** |
252 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
253 | * by vid | |
254 | * @bat_priv: the bat priv with all the soft interface information | |
255 | * @vid: the VLAN identifier of the sub-table to change | |
256 | * @v: the amount to sum to the local table size | |
257 | */ | |
258 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
259 | unsigned short vid, int v) | |
260 | { | |
261 | struct batadv_softif_vlan *vlan; | |
262 | ||
263 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
264 | if (!vlan) | |
265 | return; | |
266 | ||
267 | atomic_add(v, &vlan->tt.num_entries); | |
268 | ||
269 | batadv_softif_vlan_free_ref(vlan); | |
270 | } | |
271 | ||
272 | /** | |
273 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
274 | * vid | |
275 | * @bat_priv: the bat priv with all the soft interface information | |
276 | * @vid: the VLAN identifier | |
277 | */ | |
278 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
279 | unsigned short vid) | |
280 | { | |
281 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
282 | } | |
283 | ||
284 | /** | |
285 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
286 | * vid | |
287 | * @bat_priv: the bat priv with all the soft interface information | |
288 | * @vid: the VLAN identifier | |
289 | */ | |
290 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
291 | unsigned short vid) | |
292 | { | |
293 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
294 | } | |
295 | ||
296 | /** | |
d15cd622 AQ |
297 | * batadv_tt_global_size_mod - change the size by v of the global table |
298 | * for orig_node identified by vid | |
299 | * @orig_node: the originator for which the table has to be modified | |
7ea7b4a1 AQ |
300 | * @vid: the VLAN identifier |
301 | * @v: the amount to sum to the global table size | |
302 | */ | |
303 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
304 | unsigned short vid, int v) | |
305 | { | |
306 | struct batadv_orig_node_vlan *vlan; | |
307 | ||
308 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
309 | if (!vlan) | |
310 | return; | |
311 | ||
312 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
313 | spin_lock_bh(&orig_node->vlan_list_lock); | |
a121048a | 314 | hlist_del_init_rcu(&vlan->list); |
7ea7b4a1 AQ |
315 | spin_unlock_bh(&orig_node->vlan_list_lock); |
316 | batadv_orig_node_vlan_free_ref(vlan); | |
317 | } | |
318 | ||
319 | batadv_orig_node_vlan_free_ref(vlan); | |
320 | } | |
321 | ||
322 | /** | |
323 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
324 | * given vid | |
325 | * @orig_node: the originator which global table size has to be decreased | |
326 | * @vid: the vlan identifier | |
327 | */ | |
328 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
329 | unsigned short vid) | |
330 | { | |
331 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
332 | } | |
333 | ||
334 | /** | |
335 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
336 | * given vid | |
337 | * @orig_node: the originator which global table size has to be decreased | |
338 | * @vid: the vlan identifier | |
339 | */ | |
340 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
341 | unsigned short vid) | |
342 | { | |
343 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
344 | } | |
345 | ||
42eff6a6 SE |
346 | /** |
347 | * batadv_tt_orig_list_entry_release - release tt orig entry from lists and | |
348 | * queue for free after rcu grace period | |
349 | * @orig_entry: tt orig entry to be free'd | |
350 | */ | |
351 | static void | |
352 | batadv_tt_orig_list_entry_release(struct batadv_tt_orig_list_entry *orig_entry) | |
353 | { | |
354 | batadv_orig_node_free_ref(orig_entry->orig_node); | |
355 | kfree_rcu(orig_entry, rcu); | |
356 | } | |
357 | ||
a513088d | 358 | static void |
56303d34 | 359 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 360 | { |
d657e621 AQ |
361 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
362 | return; | |
7ea7b4a1 | 363 | |
42eff6a6 | 364 | batadv_tt_orig_list_entry_release(orig_entry); |
7683fdc1 AQ |
365 | } |
366 | ||
3abe4adb AQ |
367 | /** |
368 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
369 | * @bat_priv: the bat priv with all the soft interface information | |
370 | * @tt_local_entry: the TT entry involved in the event | |
371 | * @event_flags: flags to store in the event structure | |
372 | */ | |
56303d34 | 373 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb | 374 | struct batadv_tt_local_entry *tt_local_entry, |
6b5e971a | 375 | u8 event_flags) |
a73105b8 | 376 | { |
56303d34 | 377 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb | 378 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
6b5e971a | 379 | u8 flags = common->flags | event_flags; |
3b643de5 AQ |
380 | bool event_removed = false; |
381 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
382 | |
383 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
384 | if (!tt_change_node) |
385 | return; | |
386 | ||
ff66c975 | 387 | tt_change_node->change.flags = flags; |
ca663046 AQ |
388 | memset(tt_change_node->change.reserved, 0, |
389 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 390 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 391 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 392 | |
acd34afa | 393 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
394 | |
395 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
396 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
397 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 398 | list) { |
3abe4adb | 399 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
400 | continue; |
401 | ||
402 | /* DEL+ADD in the same orig interval have no effect and can be | |
403 | * removed to avoid silly behaviour on the receiver side. The | |
404 | * other way around (ADD+DEL) can happen in case of roaming of | |
405 | * a client still in the NEW state. Roaming of NEW clients is | |
406 | * now possible due to automatically recognition of "temporary" | |
407 | * clients | |
408 | */ | |
acd34afa | 409 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
410 | if (!del_op_requested && del_op_entry) |
411 | goto del; | |
412 | if (del_op_requested && !del_op_entry) | |
413 | goto del; | |
3c4f7ab6 AQ |
414 | |
415 | /* this is a second add in the same originator interval. It | |
416 | * means that flags have been changed: update them! | |
417 | */ | |
418 | if (!del_op_requested && !del_op_entry) | |
419 | entry->change.flags = flags; | |
420 | ||
3b643de5 AQ |
421 | continue; |
422 | del: | |
423 | list_del(&entry->list); | |
424 | kfree(entry); | |
155e4e12 | 425 | kfree(tt_change_node); |
3b643de5 AQ |
426 | event_removed = true; |
427 | goto unlock; | |
428 | } | |
429 | ||
a73105b8 | 430 | /* track the change in the OGMinterval list */ |
807736f6 | 431 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
432 | |
433 | unlock: | |
807736f6 | 434 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 435 | |
3b643de5 | 436 | if (event_removed) |
807736f6 | 437 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 438 | else |
807736f6 | 439 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
440 | } |
441 | ||
335fbe0f ML |
442 | /** |
443 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
444 | * @changes_num: number of tt changes | |
445 | * | |
62fe710f | 446 | * Return: computed length in bytes. |
335fbe0f ML |
447 | */ |
448 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 449 | { |
335fbe0f | 450 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
451 | } |
452 | ||
298e6e68 AQ |
453 | /** |
454 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
455 | * @tt_len: available space | |
456 | * | |
62fe710f | 457 | * Return: the number of entries. |
298e6e68 | 458 | */ |
6b5e971a | 459 | static u16 batadv_tt_entries(u16 tt_len) |
298e6e68 AQ |
460 | { |
461 | return tt_len / batadv_tt_len(1); | |
462 | } | |
463 | ||
a19d3d85 ML |
464 | /** |
465 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
466 | * size when transmitted over the air | |
467 | * @bat_priv: the bat priv with all the soft interface information | |
468 | * | |
62fe710f | 469 | * Return: local translation table size in bytes. |
a19d3d85 ML |
470 | */ |
471 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
472 | { | |
4f248cff SE |
473 | u16 num_vlan = 0; |
474 | u16 tt_local_entries = 0; | |
a19d3d85 ML |
475 | struct batadv_softif_vlan *vlan; |
476 | int hdr_size; | |
477 | ||
478 | rcu_read_lock(); | |
479 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
480 | num_vlan++; | |
481 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
482 | } | |
483 | rcu_read_unlock(); | |
484 | ||
485 | /* header size of tvlv encapsulated tt response payload */ | |
486 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
487 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
488 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
489 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
490 | ||
491 | return hdr_size + batadv_tt_len(tt_local_entries); | |
492 | } | |
493 | ||
56303d34 | 494 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 495 | { |
807736f6 | 496 | if (bat_priv->tt.local_hash) |
5346c35e | 497 | return 0; |
c6c8fea2 | 498 | |
807736f6 | 499 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 500 | |
807736f6 | 501 | if (!bat_priv->tt.local_hash) |
5346c35e | 502 | return -ENOMEM; |
c6c8fea2 | 503 | |
dec05074 AQ |
504 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
505 | &batadv_tt_local_hash_lock_class_key); | |
506 | ||
5346c35e | 507 | return 0; |
c6c8fea2 SE |
508 | } |
509 | ||
068ee6e2 AQ |
510 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
511 | struct batadv_tt_global_entry *tt_global, | |
512 | const char *message) | |
513 | { | |
514 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
515 | "Deleting global tt entry %pM (vid: %d): %s\n", |
516 | tt_global->common.addr, | |
517 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
518 | |
519 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 520 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 521 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
522 | } |
523 | ||
c018ad3d AQ |
524 | /** |
525 | * batadv_tt_local_add - add a new client to the local table or update an | |
526 | * existing client | |
527 | * @soft_iface: netdev struct of the mesh interface | |
528 | * @addr: the mac address of the client to add | |
529 | * @vid: VLAN identifier | |
530 | * @ifindex: index of the interface where the client is connected to (useful to | |
531 | * identify wireless clients) | |
9464d071 AQ |
532 | * @mark: the value contained in the skb->mark field of the received packet (if |
533 | * any) | |
a19d3d85 | 534 | * |
62fe710f | 535 | * Return: true if the client was successfully added, false otherwise. |
c018ad3d | 536 | */ |
6b5e971a SE |
537 | bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, |
538 | unsigned short vid, int ifindex, u32 mark) | |
c6c8fea2 | 539 | { |
56303d34 | 540 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 541 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 542 | struct batadv_tt_global_entry *tt_global = NULL; |
35df3b29 | 543 | struct batadv_softif_vlan *vlan; |
0c69aecc | 544 | struct net_device *in_dev = NULL; |
db08e6e5 | 545 | struct hlist_head *head; |
56303d34 | 546 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 | 547 | int hash_added, table_size, packet_size_max; |
4f248cff SE |
548 | bool ret = false; |
549 | bool roamed_back = false; | |
6b5e971a SE |
550 | u8 remote_flags; |
551 | u32 match_mark; | |
c6c8fea2 | 552 | |
0c69aecc AQ |
553 | if (ifindex != BATADV_NULL_IFINDEX) |
554 | in_dev = dev_get_by_index(&init_net, ifindex); | |
555 | ||
c018ad3d | 556 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
557 | |
558 | if (!is_multicast_ether_addr(addr)) | |
559 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 560 | |
47c94655 AQ |
561 | if (tt_local) { |
562 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
563 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
564 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
565 | "Re-adding pending client %pM (vid: %d)\n", |
566 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
567 | /* whatever the reason why the PENDING flag was set, |
568 | * this is a client which was enqueued to be removed in | |
569 | * this orig_interval. Since it popped up again, the | |
570 | * flag can be reset like it was never enqueued | |
571 | */ | |
572 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
573 | goto add_event; | |
574 | } | |
575 | ||
576 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
577 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
578 | "Roaming client %pM (vid: %d) came back to its original location\n", |
579 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
580 | /* the ROAM flag is set because this client roamed away |
581 | * and the node got a roaming_advertisement message. Now | |
582 | * that the client popped up again at its original | |
583 | * location such flag can be unset | |
584 | */ | |
585 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
586 | roamed_back = true; | |
587 | } | |
588 | goto check_roaming; | |
c6c8fea2 SE |
589 | } |
590 | ||
a19d3d85 ML |
591 | /* Ignore the client if we cannot send it in a full table response. */ |
592 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
593 | table_size += batadv_tt_len(1); | |
594 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
595 | if (table_size > packet_size_max) { | |
596 | net_ratelimited_function(batadv_info, soft_iface, | |
597 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
598 | table_size, packet_size_max, addr); | |
599 | goto out; | |
600 | } | |
601 | ||
47c94655 AQ |
602 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
603 | if (!tt_local) | |
7683fdc1 | 604 | goto out; |
a73105b8 | 605 | |
35df3b29 AQ |
606 | /* increase the refcounter of the related vlan */ |
607 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc | 608 | if (WARN(!vlan, "adding TT local entry %pM to non-existent VLAN %d", |
fd7dec25 SE |
609 | addr, BATADV_PRINT_VID(vid))) { |
610 | kfree(tt_local); | |
611 | tt_local = NULL; | |
354136bc | 612 | goto out; |
fd7dec25 | 613 | } |
35df3b29 | 614 | |
39c75a51 | 615 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
616 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
617 | addr, BATADV_PRINT_VID(vid), | |
6b5e971a | 618 | (u8)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 619 | |
8fdd0153 | 620 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
621 | /* The local entry has to be marked as NEW to avoid to send it in |
622 | * a full table response going out before the next ttvn increment | |
623 | * (consistency check) | |
624 | */ | |
625 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 626 | tt_local->common.vid = vid; |
0c69aecc | 627 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
628 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
629 | atomic_set(&tt_local->common.refcount, 2); | |
630 | tt_local->last_seen = jiffies; | |
631 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 632 | |
c5caf4ef LL |
633 | /* the batman interface mac and multicast addresses should never be |
634 | * purged | |
635 | */ | |
636 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
637 | is_multicast_ether_addr(addr)) | |
47c94655 | 638 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 639 | |
807736f6 | 640 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 641 | batadv_choose_tt, &tt_local->common, |
47c94655 | 642 | &tt_local->common.hash_entry); |
80b3f58c SW |
643 | |
644 | if (unlikely(hash_added != 0)) { | |
645 | /* remove the reference for the hash */ | |
47c94655 | 646 | batadv_tt_local_entry_free_ref(tt_local); |
35df3b29 | 647 | batadv_softif_vlan_free_ref(vlan); |
80b3f58c SW |
648 | goto out; |
649 | } | |
650 | ||
068ee6e2 | 651 | add_event: |
3abe4adb | 652 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 653 | |
068ee6e2 AQ |
654 | check_roaming: |
655 | /* Check whether it is a roaming, but don't do anything if the roaming | |
656 | * process has already been handled | |
657 | */ | |
658 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 659 | /* These node are probably going to update their tt table */ |
47c94655 | 660 | head = &tt_global->orig_list; |
db08e6e5 | 661 | rcu_read_lock(); |
b67bfe0d | 662 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 663 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 664 | tt_global->common.vid, |
a513088d | 665 | orig_entry->orig_node); |
db08e6e5 SW |
666 | } |
667 | rcu_read_unlock(); | |
068ee6e2 AQ |
668 | if (roamed_back) { |
669 | batadv_tt_global_free(bat_priv, tt_global, | |
670 | "Roaming canceled"); | |
671 | tt_global = NULL; | |
672 | } else { | |
673 | /* The global entry has to be marked as ROAMING and | |
674 | * has to be kept for consistency purpose | |
675 | */ | |
676 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
677 | tt_global->roam_at = jiffies; | |
678 | } | |
7683fdc1 | 679 | } |
068ee6e2 | 680 | |
3c4f7ab6 AQ |
681 | /* store the current remote flags before altering them. This helps |
682 | * understanding is flags are changing or not | |
683 | */ | |
684 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
685 | ||
686 | if (batadv_is_wifi_netdev(in_dev)) | |
687 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
688 | else | |
689 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 690 | |
9464d071 AQ |
691 | /* check the mark in the skb: if it's equal to the configured |
692 | * isolation_mark, it means the packet is coming from an isolated | |
693 | * non-mesh client | |
694 | */ | |
695 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
696 | if (bat_priv->isolation_mark_mask && | |
697 | match_mark == bat_priv->isolation_mark) | |
698 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
699 | else | |
700 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
701 | ||
3c4f7ab6 AQ |
702 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
703 | * entry so that all the nodes can get the new flags | |
704 | */ | |
705 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
706 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
707 | ||
708 | ret = true; | |
7683fdc1 | 709 | out: |
0c69aecc AQ |
710 | if (in_dev) |
711 | dev_put(in_dev); | |
47c94655 AQ |
712 | if (tt_local) |
713 | batadv_tt_local_entry_free_ref(tt_local); | |
714 | if (tt_global) | |
715 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 716 | return ret; |
c6c8fea2 SE |
717 | } |
718 | ||
7ea7b4a1 AQ |
719 | /** |
720 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
721 | * within a TT Response directed to another node | |
722 | * @orig_node: originator for which the TT data has to be prepared | |
723 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
724 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
725 | * changed can be stored | |
726 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
727 | * function reserves the amount of space needed to send the entire global TT | |
728 | * table. In case of success the value is updated with the real amount of | |
729 | * reserved bytes | |
7ea7b4a1 AQ |
730 | * Allocate the needed amount of memory for the entire TT TVLV and write its |
731 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
732 | * objects, one per active VLAN served by the originator node. | |
733 | * | |
62fe710f | 734 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 735 | */ |
6b5e971a | 736 | static u16 |
7ea7b4a1 AQ |
737 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, |
738 | struct batadv_tvlv_tt_data **tt_data, | |
739 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 740 | s32 *tt_len) |
7ea7b4a1 | 741 | { |
4f248cff SE |
742 | u16 num_vlan = 0; |
743 | u16 num_entries = 0; | |
744 | u16 change_offset; | |
745 | u16 tvlv_len; | |
7ea7b4a1 AQ |
746 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
747 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 748 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
749 | |
750 | rcu_read_lock(); | |
d0fa4f3f | 751 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
752 | num_vlan++; |
753 | num_entries += atomic_read(&vlan->tt.num_entries); | |
754 | } | |
755 | ||
756 | change_offset = sizeof(**tt_data); | |
757 | change_offset += num_vlan * sizeof(*tt_vlan); | |
758 | ||
759 | /* if tt_len is negative, allocate the space needed by the full table */ | |
760 | if (*tt_len < 0) | |
761 | *tt_len = batadv_tt_len(num_entries); | |
762 | ||
763 | tvlv_len = *tt_len; | |
764 | tvlv_len += change_offset; | |
765 | ||
766 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
767 | if (!*tt_data) { | |
768 | *tt_len = 0; | |
769 | goto out; | |
770 | } | |
771 | ||
772 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
773 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
774 | (*tt_data)->num_vlan = htons(num_vlan); | |
775 | ||
776 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
d0fa4f3f | 777 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
778 | tt_vlan->vid = htons(vlan->vid); |
779 | tt_vlan->crc = htonl(vlan->tt.crc); | |
780 | ||
781 | tt_vlan++; | |
782 | } | |
783 | ||
6b5e971a | 784 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
785 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
786 | ||
787 | out: | |
788 | rcu_read_unlock(); | |
789 | return tvlv_len; | |
790 | } | |
791 | ||
792 | /** | |
793 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
794 | * node | |
795 | * @bat_priv: the bat priv with all the soft interface information | |
796 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
797 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
798 | * changes can be stored | |
799 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
800 | * function reserves the amount of space needed to send the entire local TT | |
801 | * table. In case of success the value is updated with the real amount of | |
802 | * reserved bytes | |
803 | * | |
804 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
805 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
806 | * objects, one per active VLAN. | |
807 | * | |
62fe710f | 808 | * Return: the size of the allocated buffer or 0 in case of failure. |
7ea7b4a1 | 809 | */ |
6b5e971a | 810 | static u16 |
7ea7b4a1 AQ |
811 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, |
812 | struct batadv_tvlv_tt_data **tt_data, | |
813 | struct batadv_tvlv_tt_change **tt_change, | |
6b5e971a | 814 | s32 *tt_len) |
7ea7b4a1 AQ |
815 | { |
816 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
817 | struct batadv_softif_vlan *vlan; | |
4f248cff SE |
818 | u16 num_vlan = 0; |
819 | u16 num_entries = 0; | |
820 | u16 tvlv_len; | |
6b5e971a | 821 | u8 *tt_change_ptr; |
7ea7b4a1 AQ |
822 | int change_offset; |
823 | ||
824 | rcu_read_lock(); | |
825 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
826 | num_vlan++; | |
827 | num_entries += atomic_read(&vlan->tt.num_entries); | |
828 | } | |
829 | ||
830 | change_offset = sizeof(**tt_data); | |
831 | change_offset += num_vlan * sizeof(*tt_vlan); | |
832 | ||
833 | /* if tt_len is negative, allocate the space needed by the full table */ | |
834 | if (*tt_len < 0) | |
835 | *tt_len = batadv_tt_len(num_entries); | |
836 | ||
837 | tvlv_len = *tt_len; | |
838 | tvlv_len += change_offset; | |
839 | ||
840 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
841 | if (!*tt_data) { | |
842 | tvlv_len = 0; | |
843 | goto out; | |
844 | } | |
845 | ||
846 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
847 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
848 | (*tt_data)->num_vlan = htons(num_vlan); | |
849 | ||
850 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
851 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
852 | tt_vlan->vid = htons(vlan->vid); | |
853 | tt_vlan->crc = htonl(vlan->tt.crc); | |
854 | ||
855 | tt_vlan++; | |
856 | } | |
857 | ||
6b5e971a | 858 | tt_change_ptr = (u8 *)*tt_data + change_offset; |
7ea7b4a1 AQ |
859 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; |
860 | ||
861 | out: | |
862 | rcu_read_unlock(); | |
863 | return tvlv_len; | |
864 | } | |
865 | ||
e1bf0c14 ML |
866 | /** |
867 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
868 | * after local tt changes have been committed | |
869 | * @bat_priv: the bat priv with all the soft interface information | |
870 | */ | |
871 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 872 | { |
e1bf0c14 ML |
873 | struct batadv_tt_change_node *entry, *safe; |
874 | struct batadv_tvlv_tt_data *tt_data; | |
875 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 876 | int tt_diff_len, tt_change_len = 0; |
4f248cff SE |
877 | int tt_diff_entries_num = 0; |
878 | int tt_diff_entries_count = 0; | |
6b5e971a | 879 | u16 tvlv_len; |
be9aa4c1 | 880 | |
7ea7b4a1 AQ |
881 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
882 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
883 | |
884 | /* if we have too many changes for one packet don't send any | |
885 | * and wait for the tt table request which will be fragmented | |
886 | */ | |
e1bf0c14 ML |
887 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
888 | tt_diff_len = 0; | |
be9aa4c1 | 889 | |
7ea7b4a1 AQ |
890 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
891 | &tt_change, &tt_diff_len); | |
892 | if (!tvlv_len) | |
e1bf0c14 | 893 | return; |
be9aa4c1 | 894 | |
e1bf0c14 | 895 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 896 | |
e1bf0c14 ML |
897 | if (tt_diff_len == 0) |
898 | goto container_register; | |
be9aa4c1 | 899 | |
807736f6 SE |
900 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
901 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 902 | |
807736f6 | 903 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 904 | list) { |
e1bf0c14 ML |
905 | if (tt_diff_entries_count < tt_diff_entries_num) { |
906 | memcpy(tt_change + tt_diff_entries_count, | |
907 | &entry->change, | |
908 | sizeof(struct batadv_tvlv_tt_change)); | |
909 | tt_diff_entries_count++; | |
c6c8fea2 | 910 | } |
a73105b8 AQ |
911 | list_del(&entry->list); |
912 | kfree(entry); | |
c6c8fea2 | 913 | } |
807736f6 | 914 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
915 | |
916 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
917 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
918 | kfree(bat_priv->tt.last_changeset); | |
919 | bat_priv->tt.last_changeset_len = 0; | |
920 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 921 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 922 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 923 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 924 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
925 | * instead of providing the diff |
926 | */ | |
e1bf0c14 | 927 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 928 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
929 | memcpy(bat_priv->tt.last_changeset, |
930 | tt_change, tt_change_len); | |
931 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
932 | } |
933 | } | |
807736f6 | 934 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 935 | |
e1bf0c14 ML |
936 | container_register: |
937 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 938 | tvlv_len); |
e1bf0c14 | 939 | kfree(tt_data); |
c6c8fea2 SE |
940 | } |
941 | ||
08c36d3e | 942 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
943 | { |
944 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 945 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 946 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 947 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 948 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 949 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 950 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 951 | struct hlist_head *head; |
7ea7b4a1 | 952 | unsigned short vid; |
6b5e971a | 953 | u32 i; |
85766a82 AQ |
954 | int last_seen_secs; |
955 | int last_seen_msecs; | |
956 | unsigned long last_seen_jiffies; | |
957 | bool no_purge; | |
6b5e971a | 958 | u16 np_flag = BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 959 | |
30da63a6 ML |
960 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
961 | if (!primary_if) | |
32ae9b22 | 962 | goto out; |
c6c8fea2 | 963 | |
86ceb360 | 964 | seq_printf(seq, |
7ea7b4a1 | 965 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
6b5e971a | 966 | net_dev->name, (u8)atomic_read(&bat_priv->tt.vn)); |
dd24ddb2 | 967 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 968 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 969 | |
c6c8fea2 SE |
970 | for (i = 0; i < hash->size; i++) { |
971 | head = &hash->table[i]; | |
972 | ||
7aadf889 | 973 | rcu_read_lock(); |
b67bfe0d | 974 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 975 | head, hash_entry) { |
85766a82 AQ |
976 | tt_local = container_of(tt_common_entry, |
977 | struct batadv_tt_local_entry, | |
978 | common); | |
7ea7b4a1 | 979 | vid = tt_common_entry->vid; |
85766a82 AQ |
980 | last_seen_jiffies = jiffies - tt_local->last_seen; |
981 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
982 | last_seen_secs = last_seen_msecs / 1000; | |
983 | last_seen_msecs = last_seen_msecs % 1000; | |
984 | ||
985 | no_purge = tt_common_entry->flags & np_flag; | |
986 | ||
7ea7b4a1 AQ |
987 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
988 | if (!vlan) { | |
989 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
990 | BATADV_PRINT_VID(vid)); | |
991 | continue; | |
992 | } | |
993 | ||
994 | seq_printf(seq, | |
dd24ddb2 | 995 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 996 | tt_common_entry->addr, |
16052789 | 997 | BATADV_PRINT_VID(tt_common_entry->vid), |
a2f2b6cd SE |
998 | ((tt_common_entry->flags & |
999 | BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), | |
85766a82 | 1000 | no_purge ? 'P' : '.', |
a2f2b6cd SE |
1001 | ((tt_common_entry->flags & |
1002 | BATADV_TT_CLIENT_NEW) ? 'N' : '.'), | |
1003 | ((tt_common_entry->flags & | |
1004 | BATADV_TT_CLIENT_PENDING) ? 'X' : '.'), | |
1005 | ((tt_common_entry->flags & | |
1006 | BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1007 | ((tt_common_entry->flags & | |
1008 | BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
a7966d90 | 1009 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
1010 | no_purge ? 0 : last_seen_msecs, |
1011 | vlan->tt.crc); | |
1012 | ||
1013 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 1014 | } |
7aadf889 | 1015 | rcu_read_unlock(); |
c6c8fea2 | 1016 | } |
32ae9b22 ML |
1017 | out: |
1018 | if (primary_if) | |
e5d89254 | 1019 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1020 | return 0; |
c6c8fea2 SE |
1021 | } |
1022 | ||
56303d34 SE |
1023 | static void |
1024 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
1025 | struct batadv_tt_local_entry *tt_local_entry, | |
6b5e971a | 1026 | u16 flags, const char *message) |
c6c8fea2 | 1027 | { |
3abe4adb | 1028 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 1029 | |
015758d0 AQ |
1030 | /* The local client has to be marked as "pending to be removed" but has |
1031 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
1032 | * response issued before the net ttvn increment (consistency check) |
1033 | */ | |
acd34afa | 1034 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 1035 | |
39c75a51 | 1036 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1037 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
1038 | tt_local_entry->common.addr, | |
1039 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
1040 | } |
1041 | ||
7f91d06c AQ |
1042 | /** |
1043 | * batadv_tt_local_remove - logically remove an entry from the local table | |
1044 | * @bat_priv: the bat priv with all the soft interface information | |
1045 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1046 | * @vid: VLAN identifier |
7f91d06c AQ |
1047 | * @message: message to append to the log on deletion |
1048 | * @roaming: true if the deletion is due to a roaming event | |
1049 | * | |
62fe710f | 1050 | * Return: the flags assigned to the local entry before being deleted |
7f91d06c | 1051 | */ |
6b5e971a SE |
1052 | u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const u8 *addr, |
1053 | unsigned short vid, const char *message, | |
1054 | bool roaming) | |
c6c8fea2 | 1055 | { |
170173bf | 1056 | struct batadv_tt_local_entry *tt_local_entry; |
6b5e971a | 1057 | u16 flags, curr_flags = BATADV_NO_FLAGS; |
35df3b29 | 1058 | struct batadv_softif_vlan *vlan; |
ef72706a | 1059 | void *tt_entry_exists; |
c6c8fea2 | 1060 | |
c018ad3d | 1061 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1062 | if (!tt_local_entry) |
1063 | goto out; | |
1064 | ||
7f91d06c AQ |
1065 | curr_flags = tt_local_entry->common.flags; |
1066 | ||
acd34afa | 1067 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1068 | /* if this global entry addition is due to a roaming, the node has to |
1069 | * mark the local entry as "roamed" in order to correctly reroute | |
1070 | * packets later | |
1071 | */ | |
7c1fd91d | 1072 | if (roaming) { |
acd34afa | 1073 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1074 | /* mark the local client as ROAMed */ |
1075 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1076 | } | |
42d0b044 | 1077 | |
068ee6e2 AQ |
1078 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1079 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1080 | message); | |
1081 | goto out; | |
1082 | } | |
1083 | /* if this client has been added right now, it is possible to | |
1084 | * immediately purge it | |
1085 | */ | |
3abe4adb | 1086 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
ef72706a ML |
1087 | |
1088 | tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash, | |
1089 | batadv_compare_tt, | |
1090 | batadv_choose_tt, | |
1091 | &tt_local_entry->common); | |
1092 | if (!tt_entry_exists) | |
1093 | goto out; | |
1094 | ||
1095 | /* extra call to free the local tt entry */ | |
068ee6e2 | 1096 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c | 1097 | |
35df3b29 AQ |
1098 | /* decrease the reference held for this vlan */ |
1099 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
354136bc ML |
1100 | if (!vlan) |
1101 | goto out; | |
1102 | ||
35df3b29 AQ |
1103 | batadv_softif_vlan_free_ref(vlan); |
1104 | batadv_softif_vlan_free_ref(vlan); | |
1105 | ||
7683fdc1 AQ |
1106 | out: |
1107 | if (tt_local_entry) | |
a513088d | 1108 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1109 | |
1110 | return curr_flags; | |
c6c8fea2 SE |
1111 | } |
1112 | ||
a19d3d85 ML |
1113 | /** |
1114 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1115 | * @bat_priv: the bat priv with all the soft interface information | |
1116 | * @head: pointer to the list containing the local tt entries | |
1117 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1118 | * inactive or not | |
1119 | */ | |
56303d34 | 1120 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1121 | struct hlist_head *head, |
1122 | int timeout) | |
c6c8fea2 | 1123 | { |
56303d34 SE |
1124 | struct batadv_tt_local_entry *tt_local_entry; |
1125 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1126 | struct hlist_node *node_tmp; |
acd34afa | 1127 | |
b67bfe0d | 1128 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1129 | hash_entry) { |
1130 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1131 | struct batadv_tt_local_entry, |
1132 | common); | |
acd34afa SE |
1133 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1134 | continue; | |
1135 | ||
1136 | /* entry already marked for deletion */ | |
1137 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1138 | continue; | |
1139 | ||
a19d3d85 | 1140 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1141 | continue; |
1142 | ||
1143 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1144 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1145 | } | |
1146 | } | |
1147 | ||
a19d3d85 ML |
1148 | /** |
1149 | * batadv_tt_local_purge - purge inactive tt local entries | |
1150 | * @bat_priv: the bat priv with all the soft interface information | |
1151 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1152 | * inactive or not | |
1153 | */ | |
1154 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1155 | int timeout) | |
acd34afa | 1156 | { |
807736f6 | 1157 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1158 | struct hlist_head *head; |
7683fdc1 | 1159 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1160 | u32 i; |
c6c8fea2 | 1161 | |
c6c8fea2 SE |
1162 | for (i = 0; i < hash->size; i++) { |
1163 | head = &hash->table[i]; | |
7683fdc1 | 1164 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1165 | |
7683fdc1 | 1166 | spin_lock_bh(list_lock); |
a19d3d85 | 1167 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1168 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1169 | } |
c6c8fea2 SE |
1170 | } |
1171 | ||
56303d34 | 1172 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1173 | { |
5bf74e9c | 1174 | struct batadv_hashtable *hash; |
a73105b8 | 1175 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1176 | struct batadv_tt_common_entry *tt_common_entry; |
1177 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 1178 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 1179 | struct hlist_node *node_tmp; |
7683fdc1 | 1180 | struct hlist_head *head; |
6b5e971a | 1181 | u32 i; |
a73105b8 | 1182 | |
807736f6 | 1183 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1184 | return; |
1185 | ||
807736f6 | 1186 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1187 | |
1188 | for (i = 0; i < hash->size; i++) { | |
1189 | head = &hash->table[i]; | |
1190 | list_lock = &hash->list_locks[i]; | |
1191 | ||
1192 | spin_lock_bh(list_lock); | |
b67bfe0d | 1193 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1194 | head, hash_entry) { |
b67bfe0d | 1195 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1196 | tt_local = container_of(tt_common_entry, |
1197 | struct batadv_tt_local_entry, | |
1198 | common); | |
35df3b29 AQ |
1199 | |
1200 | /* decrease the reference held for this vlan */ | |
1201 | vlan = batadv_softif_vlan_get(bat_priv, | |
1202 | tt_common_entry->vid); | |
354136bc ML |
1203 | if (vlan) { |
1204 | batadv_softif_vlan_free_ref(vlan); | |
1205 | batadv_softif_vlan_free_ref(vlan); | |
1206 | } | |
35df3b29 | 1207 | |
56303d34 | 1208 | batadv_tt_local_entry_free_ref(tt_local); |
a73105b8 AQ |
1209 | } |
1210 | spin_unlock_bh(list_lock); | |
1211 | } | |
1212 | ||
1a8eaf07 | 1213 | batadv_hash_destroy(hash); |
a73105b8 | 1214 | |
807736f6 | 1215 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1216 | } |
1217 | ||
56303d34 | 1218 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1219 | { |
807736f6 | 1220 | if (bat_priv->tt.global_hash) |
5346c35e | 1221 | return 0; |
c6c8fea2 | 1222 | |
807736f6 | 1223 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1224 | |
807736f6 | 1225 | if (!bat_priv->tt.global_hash) |
5346c35e | 1226 | return -ENOMEM; |
c6c8fea2 | 1227 | |
dec05074 AQ |
1228 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1229 | &batadv_tt_global_hash_lock_class_key); | |
1230 | ||
5346c35e | 1231 | return 0; |
c6c8fea2 SE |
1232 | } |
1233 | ||
56303d34 | 1234 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1235 | { |
56303d34 | 1236 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1237 | |
807736f6 | 1238 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1239 | |
807736f6 | 1240 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1241 | list) { |
1242 | list_del(&entry->list); | |
1243 | kfree(entry); | |
1244 | } | |
c6c8fea2 | 1245 | |
807736f6 SE |
1246 | atomic_set(&bat_priv->tt.local_changes, 0); |
1247 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1248 | } |
c6c8fea2 | 1249 | |
62fe710f | 1250 | /** |
d15cd622 AQ |
1251 | * batadv_tt_global_orig_entry_find - find a TT orig_list_entry |
1252 | * @entry: the TT global entry where the orig_list_entry has to be | |
1253 | * extracted from | |
1254 | * @orig_node: the originator for which the orig_list_entry has to be found | |
62fe710f | 1255 | * |
d15cd622 | 1256 | * retrieve the orig_tt_list_entry belonging to orig_node from the |
d657e621 AQ |
1257 | * batadv_tt_global_entry list |
1258 | * | |
62fe710f | 1259 | * Return: it with an increased refcounter, NULL if not found |
db08e6e5 | 1260 | */ |
d657e621 AQ |
1261 | static struct batadv_tt_orig_list_entry * |
1262 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1263 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1264 | { |
d657e621 | 1265 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1266 | const struct hlist_head *head; |
db08e6e5 SW |
1267 | |
1268 | rcu_read_lock(); | |
1269 | head = &entry->orig_list; | |
b67bfe0d | 1270 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1271 | if (tmp_orig_entry->orig_node != orig_node) |
1272 | continue; | |
1273 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1274 | continue; | |
1275 | ||
1276 | orig_entry = tmp_orig_entry; | |
1277 | break; | |
db08e6e5 SW |
1278 | } |
1279 | rcu_read_unlock(); | |
d657e621 AQ |
1280 | |
1281 | return orig_entry; | |
1282 | } | |
1283 | ||
62fe710f | 1284 | /** |
d15cd622 AQ |
1285 | * batadv_tt_global_entry_has_orig - check if a TT global entry is also handled |
1286 | * by a given originator | |
1287 | * @entry: the TT global entry to check | |
1288 | * @orig_node: the originator to search in the list | |
62fe710f SE |
1289 | * |
1290 | * find out if an orig_node is already in the list of a tt_global_entry. | |
1291 | * | |
1292 | * Return: true if found, false otherwise | |
d657e621 AQ |
1293 | */ |
1294 | static bool | |
1295 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1296 | const struct batadv_orig_node *orig_node) | |
1297 | { | |
1298 | struct batadv_tt_orig_list_entry *orig_entry; | |
1299 | bool found = false; | |
1300 | ||
1301 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1302 | if (orig_entry) { | |
1303 | found = true; | |
1304 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1305 | } | |
1306 | ||
db08e6e5 SW |
1307 | return found; |
1308 | } | |
1309 | ||
a513088d | 1310 | static void |
d657e621 | 1311 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1312 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1313 | { |
56303d34 | 1314 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1315 | |
d657e621 | 1316 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1317 | if (orig_entry) { |
1318 | /* refresh the ttvn: the current value could be a bogus one that | |
1319 | * was added during a "temporary client detection" | |
1320 | */ | |
1321 | orig_entry->ttvn = ttvn; | |
d657e621 | 1322 | goto out; |
30cfd02b | 1323 | } |
d657e621 | 1324 | |
db08e6e5 SW |
1325 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1326 | if (!orig_entry) | |
d657e621 | 1327 | goto out; |
db08e6e5 SW |
1328 | |
1329 | INIT_HLIST_NODE(&orig_entry->list); | |
1330 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1331 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1332 | orig_entry->orig_node = orig_node; |
1333 | orig_entry->ttvn = ttvn; | |
d657e621 | 1334 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1335 | |
d657e621 | 1336 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1337 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1338 | &tt_global->orig_list); |
1339 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1340 | atomic_inc(&tt_global->orig_list_count); |
1341 | ||
d657e621 AQ |
1342 | out: |
1343 | if (orig_entry) | |
1344 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1345 | } |
1346 | ||
d4ff40f6 AQ |
1347 | /** |
1348 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1349 | * @bat_priv: the bat priv with all the soft interface information | |
1350 | * @orig_node: the originator announcing the client | |
1351 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1352 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1353 | * @flags: TT flags that have to be set for this non-mesh client |
1354 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1355 | * | |
1356 | * Add a new TT global entry for the given originator. If the entry already | |
1357 | * exists add a new reference to the given originator (a global entry can have | |
1358 | * references to multiple originators) and adjust the flags attribute to reflect | |
1359 | * the function argument. | |
1360 | * If a TT local entry exists for this non-mesh client remove it. | |
1361 | * | |
1362 | * The caller must hold orig_node refcount. | |
1e5d49fc | 1363 | * |
62fe710f | 1364 | * Return: true if the new entry has been added, false otherwise |
d4ff40f6 | 1365 | */ |
1e5d49fc AQ |
1366 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1367 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1368 | const unsigned char *tt_addr, |
6b5e971a | 1369 | unsigned short vid, u16 flags, u8 ttvn) |
a73105b8 | 1370 | { |
170173bf SE |
1371 | struct batadv_tt_global_entry *tt_global_entry; |
1372 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1373 | bool ret = false; |
80b3f58c | 1374 | int hash_added; |
56303d34 | 1375 | struct batadv_tt_common_entry *common; |
6b5e971a | 1376 | u16 local_flags; |
c6c8fea2 | 1377 | |
cfd4f757 AQ |
1378 | /* ignore global entries from backbone nodes */ |
1379 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1380 | return true; | |
1381 | ||
c018ad3d AQ |
1382 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1383 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1384 | |
1385 | /* if the node already has a local client for this entry, it has to wait | |
1386 | * for a roaming advertisement instead of manually messing up the global | |
1387 | * table | |
1388 | */ | |
1389 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1390 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1391 | goto out; | |
a73105b8 AQ |
1392 | |
1393 | if (!tt_global_entry) { | |
d4f44692 | 1394 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1395 | if (!tt_global_entry) |
7683fdc1 AQ |
1396 | goto out; |
1397 | ||
c0a55929 | 1398 | common = &tt_global_entry->common; |
8fdd0153 | 1399 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1400 | common->vid = vid; |
db08e6e5 | 1401 | |
d4f44692 | 1402 | common->flags = flags; |
cc47f66e | 1403 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1404 | /* node must store current time in case of roaming. This is |
1405 | * needed to purge this entry out on timeout (if nobody claims | |
1406 | * it) | |
1407 | */ | |
1408 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1409 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1410 | atomic_set(&common->refcount, 2); |
30cfd02b | 1411 | common->added_at = jiffies; |
db08e6e5 SW |
1412 | |
1413 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1414 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1415 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1416 | |
807736f6 | 1417 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1418 | batadv_compare_tt, |
c018ad3d | 1419 | batadv_choose_tt, common, |
a513088d | 1420 | &common->hash_entry); |
80b3f58c SW |
1421 | |
1422 | if (unlikely(hash_added != 0)) { | |
1423 | /* remove the reference for the hash */ | |
a513088d | 1424 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1425 | goto out_remove; |
1426 | } | |
a73105b8 | 1427 | } else { |
068ee6e2 | 1428 | common = &tt_global_entry->common; |
30cfd02b AQ |
1429 | /* If there is already a global entry, we can use this one for |
1430 | * our processing. | |
068ee6e2 AQ |
1431 | * But if we are trying to add a temporary client then here are |
1432 | * two options at this point: | |
1433 | * 1) the global client is not a temporary client: the global | |
1434 | * client has to be left as it is, temporary information | |
1435 | * should never override any already known client state | |
1436 | * 2) the global client is a temporary client: purge the | |
1437 | * originator list and add the new one orig_entry | |
30cfd02b | 1438 | */ |
068ee6e2 AQ |
1439 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1440 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1441 | goto out; | |
1442 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1443 | orig_node)) | |
1444 | goto out_remove; | |
1445 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1446 | goto add_orig_entry; | |
1447 | } | |
30cfd02b AQ |
1448 | |
1449 | /* if the client was temporary added before receiving the first | |
a6cb3909 SW |
1450 | * OGM announcing it, we have to clear the TEMP flag. Also, |
1451 | * remove the previous temporary orig node and re-add it | |
1452 | * if required. If the orig entry changed, the new one which | |
1453 | * is a non-temporary entry is preferred. | |
30cfd02b | 1454 | */ |
a6cb3909 SW |
1455 | if (common->flags & BATADV_TT_CLIENT_TEMP) { |
1456 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1457 | common->flags &= ~BATADV_TT_CLIENT_TEMP; | |
1458 | } | |
db08e6e5 | 1459 | |
e9c00136 AQ |
1460 | /* the change can carry possible "attribute" flags like the |
1461 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1462 | * client entry | |
1463 | */ | |
ad7e2c46 | 1464 | common->flags |= flags; |
e9c00136 | 1465 | |
acd34afa SE |
1466 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1467 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1468 | * delete + roaming change for this originator. |
1469 | * | |
1470 | * We should first delete the old originator before adding the | |
1471 | * new one. | |
1472 | */ | |
068ee6e2 | 1473 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1474 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1475 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1476 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1477 | } |
1478 | } | |
068ee6e2 | 1479 | add_orig_entry: |
30cfd02b | 1480 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1481 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1482 | |
39c75a51 | 1483 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1484 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1485 | common->addr, BATADV_PRINT_VID(common->vid), | |
1486 | orig_node->orig); | |
1e5d49fc | 1487 | ret = true; |
c6c8fea2 | 1488 | |
80b3f58c | 1489 | out_remove: |
c5caf4ef LL |
1490 | /* Do not remove multicast addresses from the local hash on |
1491 | * global additions | |
1492 | */ | |
1493 | if (is_multicast_ether_addr(tt_addr)) | |
1494 | goto out; | |
7f91d06c | 1495 | |
a73105b8 | 1496 | /* remove address from local hash if present */ |
c018ad3d | 1497 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1498 | "global tt received", |
c1d07431 | 1499 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1500 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1501 | ||
068ee6e2 AQ |
1502 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1503 | /* this is a normal global add. Therefore the client is not in a | |
1504 | * roaming state anymore. | |
1505 | */ | |
1506 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1507 | ||
7683fdc1 AQ |
1508 | out: |
1509 | if (tt_global_entry) | |
a513088d | 1510 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1511 | if (tt_local_entry) |
1512 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1513 | return ret; |
c6c8fea2 SE |
1514 | } |
1515 | ||
1b371d13 SW |
1516 | /** |
1517 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1518 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1519 | * @tt_global_entry: global translation table entry to be analyzed |
1520 | * | |
1521 | * This functon assumes the caller holds rcu_read_lock(). | |
62fe710f | 1522 | * Return: best originator list entry or NULL on errors. |
981d8900 SE |
1523 | */ |
1524 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1525 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1526 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1527 | { |
4627456a AQ |
1528 | struct batadv_neigh_node *router, *best_router = NULL; |
1529 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1530 | struct hlist_head *head; |
981d8900 | 1531 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1532 | |
1533 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1534 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1535 | router = batadv_orig_router_get(orig_entry->orig_node, |
1536 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1537 | if (!router) |
1538 | continue; | |
1539 | ||
4627456a | 1540 | if (best_router && |
89652331 SW |
1541 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1542 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1543 | batadv_neigh_node_free_ref(router); |
1544 | continue; | |
981d8900 SE |
1545 | } |
1546 | ||
4627456a AQ |
1547 | /* release the refcount for the "old" best */ |
1548 | if (best_router) | |
1549 | batadv_neigh_node_free_ref(best_router); | |
1550 | ||
1551 | best_entry = orig_entry; | |
1552 | best_router = router; | |
981d8900 SE |
1553 | } |
1554 | ||
4627456a AQ |
1555 | if (best_router) |
1556 | batadv_neigh_node_free_ref(best_router); | |
1557 | ||
981d8900 SE |
1558 | return best_entry; |
1559 | } | |
1560 | ||
1b371d13 SW |
1561 | /** |
1562 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1563 | * for this global entry | |
4627456a | 1564 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1565 | * @tt_global_entry: global translation table entry to be printed |
1566 | * @seq: debugfs table seq_file struct | |
1567 | * | |
1568 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1569 | */ |
a513088d | 1570 | static void |
4627456a AQ |
1571 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1572 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1573 | struct seq_file *seq) |
db08e6e5 | 1574 | { |
981d8900 | 1575 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1576 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1577 | struct batadv_orig_node_vlan *vlan; |
1578 | struct hlist_head *head; | |
6b5e971a SE |
1579 | u8 last_ttvn; |
1580 | u16 flags; | |
db08e6e5 SW |
1581 | |
1582 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1583 | flags = tt_common_entry->flags; |
1584 | ||
4627456a | 1585 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1586 | if (best_entry) { |
7ea7b4a1 AQ |
1587 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1588 | tt_common_entry->vid); | |
1589 | if (!vlan) { | |
1590 | seq_printf(seq, | |
1591 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1592 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1593 | best_entry->orig_node->orig); | |
1594 | goto print_list; | |
1595 | } | |
1596 | ||
981d8900 | 1597 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1598 | seq_printf(seq, |
dd24ddb2 | 1599 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1600 | '*', tt_global_entry->common.addr, |
16052789 | 1601 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1602 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1603 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1604 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1605 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1606 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1607 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1608 | |
1609 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1610 | } |
db08e6e5 | 1611 | |
7ea7b4a1 | 1612 | print_list: |
db08e6e5 SW |
1613 | head = &tt_global_entry->orig_list; |
1614 | ||
b67bfe0d | 1615 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1616 | if (best_entry == orig_entry) |
1617 | continue; | |
1618 | ||
7ea7b4a1 AQ |
1619 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1620 | tt_common_entry->vid); | |
1621 | if (!vlan) { | |
1622 | seq_printf(seq, | |
1623 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1624 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1625 | orig_entry->orig_node->orig); | |
1626 | continue; | |
1627 | } | |
1628 | ||
db08e6e5 | 1629 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1630 | seq_printf(seq, |
dd24ddb2 | 1631 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1632 | '+', tt_global_entry->common.addr, |
16052789 | 1633 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1634 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1635 | last_ttvn, vlan->tt.crc, |
a2f2b6cd SE |
1636 | ((flags & BATADV_TT_CLIENT_ROAM) ? 'R' : '.'), |
1637 | ((flags & BATADV_TT_CLIENT_WIFI) ? 'W' : '.'), | |
1638 | ((flags & BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'), | |
1639 | ((flags & BATADV_TT_CLIENT_TEMP) ? 'T' : '.')); | |
7ea7b4a1 AQ |
1640 | |
1641 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1642 | } |
1643 | } | |
1644 | ||
08c36d3e | 1645 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1646 | { |
1647 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1648 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1649 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1650 | struct batadv_tt_common_entry *tt_common_entry; |
1651 | struct batadv_tt_global_entry *tt_global; | |
1652 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1653 | struct hlist_head *head; |
6b5e971a | 1654 | u32 i; |
c6c8fea2 | 1655 | |
30da63a6 ML |
1656 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1657 | if (!primary_if) | |
32ae9b22 | 1658 | goto out; |
c6c8fea2 | 1659 | |
2dafb49d AQ |
1660 | seq_printf(seq, |
1661 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1662 | net_dev->name); |
16052789 AQ |
1663 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1664 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1665 | "CRC", "Flags"); | |
c6c8fea2 | 1666 | |
c6c8fea2 SE |
1667 | for (i = 0; i < hash->size; i++) { |
1668 | head = &hash->table[i]; | |
1669 | ||
7aadf889 | 1670 | rcu_read_lock(); |
b67bfe0d | 1671 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1672 | head, hash_entry) { |
56303d34 SE |
1673 | tt_global = container_of(tt_common_entry, |
1674 | struct batadv_tt_global_entry, | |
1675 | common); | |
4627456a | 1676 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1677 | } |
7aadf889 | 1678 | rcu_read_unlock(); |
c6c8fea2 | 1679 | } |
32ae9b22 ML |
1680 | out: |
1681 | if (primary_if) | |
e5d89254 | 1682 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1683 | return 0; |
c6c8fea2 SE |
1684 | } |
1685 | ||
1d8ab8d3 | 1686 | /** |
433ff98f | 1687 | * _batadv_tt_global_del_orig_entry - remove and free an orig_entry |
1d8ab8d3 LL |
1688 | * @tt_global_entry: the global entry to remove the orig_entry from |
1689 | * @orig_entry: the orig entry to remove and free | |
1690 | * | |
1691 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1692 | * free this orig_entry afterwards. | |
433ff98f ML |
1693 | * |
1694 | * Caller must hold tt_global_entry->list_lock and ensure orig_entry->list is | |
1695 | * part of a list. | |
1d8ab8d3 LL |
1696 | */ |
1697 | static void | |
433ff98f ML |
1698 | _batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
1699 | struct batadv_tt_orig_list_entry *orig_entry) | |
1d8ab8d3 | 1700 | { |
2c72d655 SE |
1701 | lockdep_assert_held(&tt_global_entry->list_lock); |
1702 | ||
1d8ab8d3 LL |
1703 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1704 | tt_global_entry->common.vid); | |
1705 | atomic_dec(&tt_global_entry->orig_list_count); | |
433ff98f ML |
1706 | /* requires holding tt_global_entry->list_lock and orig_entry->list |
1707 | * being part of a list | |
1708 | */ | |
1d8ab8d3 LL |
1709 | hlist_del_rcu(&orig_entry->list); |
1710 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1711 | } | |
1712 | ||
db08e6e5 | 1713 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1714 | static void |
56303d34 | 1715 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1716 | { |
db08e6e5 | 1717 | struct hlist_head *head; |
b67bfe0d | 1718 | struct hlist_node *safe; |
56303d34 | 1719 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1720 | |
db08e6e5 SW |
1721 | spin_lock_bh(&tt_global_entry->list_lock); |
1722 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 | 1723 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
433ff98f | 1724 | _batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); |
db08e6e5 | 1725 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1726 | } |
1727 | ||
1d8ab8d3 LL |
1728 | /** |
1729 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1730 | * @bat_priv: the bat priv with all the soft interface information | |
1731 | * @tt_global_entry: the global entry to remove the orig_node from | |
1732 | * @orig_node: the originator announcing the client | |
1733 | * @message: message to append to the log on deletion | |
1734 | * | |
1735 | * Remove the given orig_node and its according orig_entry from the given | |
1736 | * global tt entry. | |
1737 | */ | |
a513088d | 1738 | static void |
1d8ab8d3 LL |
1739 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1740 | struct batadv_tt_global_entry *tt_global_entry, | |
1741 | struct batadv_orig_node *orig_node, | |
1742 | const char *message) | |
db08e6e5 SW |
1743 | { |
1744 | struct hlist_head *head; | |
b67bfe0d | 1745 | struct hlist_node *safe; |
56303d34 | 1746 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1747 | unsigned short vid; |
db08e6e5 SW |
1748 | |
1749 | spin_lock_bh(&tt_global_entry->list_lock); | |
1750 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1751 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1752 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1753 | vid = tt_global_entry->common.vid; |
39c75a51 | 1754 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1755 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1756 | orig_node->orig, |
16052789 AQ |
1757 | tt_global_entry->common.addr, |
1758 | BATADV_PRINT_VID(vid), message); | |
433ff98f ML |
1759 | _batadv_tt_global_del_orig_entry(tt_global_entry, |
1760 | orig_entry); | |
db08e6e5 SW |
1761 | } |
1762 | } | |
1763 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1764 | } | |
1765 | ||
db08e6e5 | 1766 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1767 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1768 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1769 | */ |
a513088d | 1770 | static void |
56303d34 SE |
1771 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1772 | struct batadv_tt_global_entry *tt_global_entry, | |
1773 | struct batadv_orig_node *orig_node, | |
1774 | const char *message) | |
db08e6e5 SW |
1775 | { |
1776 | bool last_entry = true; | |
1777 | struct hlist_head *head; | |
56303d34 | 1778 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1779 | |
1780 | /* no local entry exists, case 1: | |
1781 | * Check if this is the last one or if other entries exist. | |
1782 | */ | |
1783 | ||
1784 | rcu_read_lock(); | |
1785 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1786 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1787 | if (orig_entry->orig_node != orig_node) { |
1788 | last_entry = false; | |
1789 | break; | |
1790 | } | |
1791 | } | |
1792 | rcu_read_unlock(); | |
1793 | ||
1794 | if (last_entry) { | |
1795 | /* its the last one, mark for roaming. */ | |
acd34afa | 1796 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1797 | tt_global_entry->roam_at = jiffies; |
1798 | } else | |
1799 | /* there is another entry, we can simply delete this | |
1800 | * one and can still use the other one. | |
1801 | */ | |
1d8ab8d3 LL |
1802 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1803 | orig_node, message); | |
db08e6e5 SW |
1804 | } |
1805 | ||
c018ad3d AQ |
1806 | /** |
1807 | * batadv_tt_global_del - remove a client from the global table | |
1808 | * @bat_priv: the bat priv with all the soft interface information | |
1809 | * @orig_node: an originator serving this client | |
1810 | * @addr: the mac address of the client | |
1811 | * @vid: VLAN identifier | |
1812 | * @message: a message explaining the reason for deleting the client to print | |
1813 | * for debugging purpose | |
1814 | * @roaming: true if the deletion has been triggered by a roaming event | |
1815 | */ | |
56303d34 SE |
1816 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1817 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1818 | const unsigned char *addr, unsigned short vid, |
a513088d | 1819 | const char *message, bool roaming) |
a73105b8 | 1820 | { |
170173bf | 1821 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1822 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1823 | |
c018ad3d | 1824 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1825 | if (!tt_global_entry) |
7683fdc1 | 1826 | goto out; |
a73105b8 | 1827 | |
db08e6e5 | 1828 | if (!roaming) { |
1d8ab8d3 LL |
1829 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1830 | orig_node, message); | |
db08e6e5 SW |
1831 | |
1832 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1833 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1834 | message); | |
db08e6e5 SW |
1835 | |
1836 | goto out; | |
1837 | } | |
92f90f56 SE |
1838 | |
1839 | /* if we are deleting a global entry due to a roam | |
1840 | * event, there are two possibilities: | |
db08e6e5 SW |
1841 | * 1) the client roamed from node A to node B => if there |
1842 | * is only one originator left for this client, we mark | |
acd34afa | 1843 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1844 | * wait for node B to claim it. In case of timeout |
1845 | * the entry is purged. | |
db08e6e5 SW |
1846 | * |
1847 | * If there are other originators left, we directly delete | |
1848 | * the originator. | |
92f90f56 | 1849 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1850 | * the global entry, since it is useless now. |
1851 | */ | |
a513088d | 1852 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1853 | tt_global_entry->common.addr, |
1854 | vid); | |
a513088d | 1855 | if (local_entry) { |
db08e6e5 | 1856 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1857 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1858 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1859 | } else |
1860 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1861 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1862 | orig_node, message); | |
92f90f56 | 1863 | |
cc47f66e | 1864 | out: |
7683fdc1 | 1865 | if (tt_global_entry) |
a513088d SE |
1866 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1867 | if (local_entry) | |
1868 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1869 | } |
1870 | ||
95fb130d AQ |
1871 | /** |
1872 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1873 | * given originator matching the provided vid | |
1874 | * @bat_priv: the bat priv with all the soft interface information | |
1875 | * @orig_node: the originator owning the entries to remove | |
1876 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1877 | * removed | |
1878 | * @message: debug message to print as "reason" | |
1879 | */ | |
56303d34 SE |
1880 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1881 | struct batadv_orig_node *orig_node, | |
6b5e971a | 1882 | s32 match_vid, |
56303d34 | 1883 | const char *message) |
c6c8fea2 | 1884 | { |
56303d34 SE |
1885 | struct batadv_tt_global_entry *tt_global; |
1886 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 1887 | u32 i; |
807736f6 | 1888 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1889 | struct hlist_node *safe; |
a73105b8 | 1890 | struct hlist_head *head; |
7683fdc1 | 1891 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1892 | unsigned short vid; |
c6c8fea2 | 1893 | |
6e801494 SW |
1894 | if (!hash) |
1895 | return; | |
1896 | ||
a73105b8 AQ |
1897 | for (i = 0; i < hash->size; i++) { |
1898 | head = &hash->table[i]; | |
7683fdc1 | 1899 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1900 | |
7683fdc1 | 1901 | spin_lock_bh(list_lock); |
b67bfe0d | 1902 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1903 | head, hash_entry) { |
95fb130d AQ |
1904 | /* remove only matching entries */ |
1905 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1906 | continue; | |
1907 | ||
56303d34 SE |
1908 | tt_global = container_of(tt_common_entry, |
1909 | struct batadv_tt_global_entry, | |
1910 | common); | |
db08e6e5 | 1911 | |
1d8ab8d3 LL |
1912 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1913 | orig_node, message); | |
db08e6e5 | 1914 | |
56303d34 | 1915 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1916 | vid = tt_global->common.vid; |
39c75a51 | 1917 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1918 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1919 | tt_global->common.addr, | |
1920 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1921 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1922 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1923 | } |
a73105b8 | 1924 | } |
7683fdc1 | 1925 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1926 | } |
ac4eebd4 | 1927 | clear_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
c6c8fea2 SE |
1928 | } |
1929 | ||
30cfd02b AQ |
1930 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1931 | char **msg) | |
cc47f66e | 1932 | { |
30cfd02b AQ |
1933 | bool purge = false; |
1934 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1935 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1936 | |
30cfd02b AQ |
1937 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1938 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1939 | purge = true; | |
1940 | *msg = "Roaming timeout\n"; | |
1941 | } | |
42d0b044 | 1942 | |
30cfd02b AQ |
1943 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1944 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1945 | purge = true; | |
1946 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1947 | } |
30cfd02b AQ |
1948 | |
1949 | return purge; | |
42d0b044 SE |
1950 | } |
1951 | ||
30cfd02b | 1952 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1953 | { |
807736f6 | 1954 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1955 | struct hlist_head *head; |
b67bfe0d | 1956 | struct hlist_node *node_tmp; |
7683fdc1 | 1957 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
6b5e971a | 1958 | u32 i; |
30cfd02b AQ |
1959 | char *msg = NULL; |
1960 | struct batadv_tt_common_entry *tt_common; | |
1961 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1962 | |
cc47f66e AQ |
1963 | for (i = 0; i < hash->size; i++) { |
1964 | head = &hash->table[i]; | |
7683fdc1 | 1965 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1966 | |
7683fdc1 | 1967 | spin_lock_bh(list_lock); |
b67bfe0d | 1968 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1969 | hash_entry) { |
1970 | tt_global = container_of(tt_common, | |
1971 | struct batadv_tt_global_entry, | |
1972 | common); | |
1973 | ||
1974 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1975 | continue; | |
1976 | ||
1977 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1978 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1979 | tt_global->common.addr, | |
1980 | BATADV_PRINT_VID(tt_global->common.vid), | |
1981 | msg); | |
30cfd02b | 1982 | |
b67bfe0d | 1983 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1984 | |
1985 | batadv_tt_global_entry_free_ref(tt_global); | |
1986 | } | |
7683fdc1 | 1987 | spin_unlock_bh(list_lock); |
cc47f66e | 1988 | } |
cc47f66e AQ |
1989 | } |
1990 | ||
56303d34 | 1991 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1992 | { |
5bf74e9c | 1993 | struct batadv_hashtable *hash; |
7683fdc1 | 1994 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1995 | struct batadv_tt_common_entry *tt_common_entry; |
1996 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1997 | struct hlist_node *node_tmp; |
7683fdc1 | 1998 | struct hlist_head *head; |
6b5e971a | 1999 | u32 i; |
7683fdc1 | 2000 | |
807736f6 | 2001 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
2002 | return; |
2003 | ||
807736f6 | 2004 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
2005 | |
2006 | for (i = 0; i < hash->size; i++) { | |
2007 | head = &hash->table[i]; | |
2008 | list_lock = &hash->list_locks[i]; | |
2009 | ||
2010 | spin_lock_bh(list_lock); | |
b67bfe0d | 2011 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 2012 | head, hash_entry) { |
b67bfe0d | 2013 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
2014 | tt_global = container_of(tt_common_entry, |
2015 | struct batadv_tt_global_entry, | |
2016 | common); | |
2017 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
2018 | } |
2019 | spin_unlock_bh(list_lock); | |
2020 | } | |
2021 | ||
1a8eaf07 | 2022 | batadv_hash_destroy(hash); |
7683fdc1 | 2023 | |
807736f6 | 2024 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
2025 | } |
2026 | ||
56303d34 SE |
2027 | static bool |
2028 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
2029 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
2030 | { |
2031 | bool ret = false; | |
2032 | ||
acd34afa SE |
2033 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
2034 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
2035 | ret = true; |
2036 | ||
2d2fcc2a AQ |
2037 | /* check if the two clients are marked as isolated */ |
2038 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
2039 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
2040 | ret = true; | |
2041 | ||
59b699cd AQ |
2042 | return ret; |
2043 | } | |
2044 | ||
c018ad3d AQ |
2045 | /** |
2046 | * batadv_transtable_search - get the mesh destination for a given client | |
2047 | * @bat_priv: the bat priv with all the soft interface information | |
2048 | * @src: mac address of the source client | |
2049 | * @addr: mac address of the destination client | |
2050 | * @vid: VLAN identifier | |
2051 | * | |
62fe710f | 2052 | * Return: a pointer to the originator that was selected as destination in the |
c018ad3d AQ |
2053 | * mesh for contacting the client 'addr', NULL otherwise. |
2054 | * In case of multiple originators serving the same client, the function returns | |
2055 | * the best one (best in terms of metric towards the destination node). | |
2056 | * | |
2057 | * If the two clients are AP isolated the function returns NULL. | |
2058 | */ | |
56303d34 | 2059 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
6b5e971a SE |
2060 | const u8 *src, |
2061 | const u8 *addr, | |
c018ad3d | 2062 | unsigned short vid) |
c6c8fea2 | 2063 | { |
56303d34 SE |
2064 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2065 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
2066 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 2067 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 2068 | |
eceb22ae | 2069 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 2070 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
2071 | if (!tt_local_entry || |
2072 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
2073 | goto out; |
2074 | } | |
7aadf889 | 2075 | |
c018ad3d | 2076 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 2077 | if (!tt_global_entry) |
7b36e8ee | 2078 | goto out; |
7aadf889 | 2079 | |
3d393e47 | 2080 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
2081 | * isolation |
2082 | */ | |
a513088d SE |
2083 | if (tt_local_entry && |
2084 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
2085 | goto out; |
2086 | ||
db08e6e5 | 2087 | rcu_read_lock(); |
4627456a | 2088 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 2089 | /* found anything? */ |
981d8900 SE |
2090 | if (best_entry) |
2091 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
2092 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
2093 | orig_node = NULL; | |
2094 | rcu_read_unlock(); | |
981d8900 | 2095 | |
7b36e8ee | 2096 | out: |
3d393e47 | 2097 | if (tt_global_entry) |
a513088d | 2098 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 2099 | if (tt_local_entry) |
a513088d | 2100 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 2101 | |
7b36e8ee | 2102 | return orig_node; |
c6c8fea2 | 2103 | } |
a73105b8 | 2104 | |
ced72933 AQ |
2105 | /** |
2106 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2107 | * to the given orig_node | |
2108 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2109 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2110 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2111 | * |
2112 | * This function computes the checksum for the global table corresponding to a | |
2113 | * specific originator. In particular, the checksum is computed as follows: For | |
2114 | * each client connected to the originator the CRC32C of the MAC address and the | |
2115 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2116 | * together. | |
2117 | * | |
2118 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2119 | * produce a unique hash of the table, but since the order which is used to feed | |
2120 | * the CRC32C function affects the result and since every node in the network | |
2121 | * probably sorts the clients differently, the hash function cannot be directly | |
2122 | * computed over the entire table. Hence the CRC32C is used only on | |
2123 | * the single client entry, while all the results are then xor'ed together | |
2124 | * because the XOR operation can combine them all while trying to reduce the | |
2125 | * noise as much as possible. | |
2126 | * | |
62fe710f | 2127 | * Return: the checksum of the global table of a given originator. |
ced72933 | 2128 | */ |
6b5e971a SE |
2129 | static u32 batadv_tt_global_crc(struct batadv_priv *bat_priv, |
2130 | struct batadv_orig_node *orig_node, | |
2131 | unsigned short vid) | |
a73105b8 | 2132 | { |
807736f6 | 2133 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2134 | struct batadv_tt_common_entry *tt_common; |
2135 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2136 | struct hlist_head *head; |
6b5e971a SE |
2137 | u32 i, crc_tmp, crc = 0; |
2138 | u8 flags; | |
a30e22ca | 2139 | __be16 tmp_vid; |
a73105b8 AQ |
2140 | |
2141 | for (i = 0; i < hash->size; i++) { | |
2142 | head = &hash->table[i]; | |
2143 | ||
2144 | rcu_read_lock(); | |
b67bfe0d | 2145 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2146 | tt_global = container_of(tt_common, |
2147 | struct batadv_tt_global_entry, | |
2148 | common); | |
7ea7b4a1 AQ |
2149 | /* compute the CRC only for entries belonging to the |
2150 | * VLAN identified by the vid passed as parameter | |
2151 | */ | |
2152 | if (tt_common->vid != vid) | |
2153 | continue; | |
2154 | ||
db08e6e5 SW |
2155 | /* Roaming clients are in the global table for |
2156 | * consistency only. They don't have to be | |
2157 | * taken into account while computing the | |
2158 | * global crc | |
2159 | */ | |
acd34afa | 2160 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2161 | continue; |
30cfd02b AQ |
2162 | /* Temporary clients have not been announced yet, so |
2163 | * they have to be skipped while computing the global | |
2164 | * crc | |
2165 | */ | |
2166 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2167 | continue; | |
db08e6e5 SW |
2168 | |
2169 | /* find out if this global entry is announced by this | |
2170 | * originator | |
2171 | */ | |
56303d34 | 2172 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2173 | orig_node)) |
db08e6e5 SW |
2174 | continue; |
2175 | ||
a30e22ca AQ |
2176 | /* use network order to read the VID: this ensures that |
2177 | * every node reads the bytes in the same order. | |
2178 | */ | |
2179 | tmp_vid = htons(tt_common->vid); | |
2180 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2181 | |
2182 | /* compute the CRC on flags that have to be kept in sync | |
2183 | * among nodes | |
2184 | */ | |
2185 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2186 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2187 | ||
0ffa9e8d | 2188 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2189 | } |
2190 | rcu_read_unlock(); | |
2191 | } | |
2192 | ||
ced72933 | 2193 | return crc; |
a73105b8 AQ |
2194 | } |
2195 | ||
ced72933 AQ |
2196 | /** |
2197 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2198 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2199 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2200 | * |
2201 | * For details about the computation, please refer to the documentation for | |
2202 | * batadv_tt_global_crc(). | |
2203 | * | |
62fe710f | 2204 | * Return: the checksum of the local table |
ced72933 | 2205 | */ |
6b5e971a SE |
2206 | static u32 batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2207 | unsigned short vid) | |
a73105b8 | 2208 | { |
807736f6 | 2209 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2210 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2211 | struct hlist_head *head; |
6b5e971a SE |
2212 | u32 i, crc_tmp, crc = 0; |
2213 | u8 flags; | |
a30e22ca | 2214 | __be16 tmp_vid; |
a73105b8 AQ |
2215 | |
2216 | for (i = 0; i < hash->size; i++) { | |
2217 | head = &hash->table[i]; | |
2218 | ||
2219 | rcu_read_lock(); | |
b67bfe0d | 2220 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2221 | /* compute the CRC only for entries belonging to the |
2222 | * VLAN identified by vid | |
2223 | */ | |
2224 | if (tt_common->vid != vid) | |
2225 | continue; | |
2226 | ||
058d0e26 | 2227 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2228 | * account while computing the CRC |
2229 | */ | |
acd34afa | 2230 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2231 | continue; |
ced72933 | 2232 | |
a30e22ca AQ |
2233 | /* use network order to read the VID: this ensures that |
2234 | * every node reads the bytes in the same order. | |
2235 | */ | |
2236 | tmp_vid = htons(tt_common->vid); | |
2237 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2238 | |
2239 | /* compute the CRC on flags that have to be kept in sync | |
2240 | * among nodes | |
2241 | */ | |
2242 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2243 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2244 | ||
0ffa9e8d | 2245 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2246 | } |
a73105b8 AQ |
2247 | rcu_read_unlock(); |
2248 | } | |
2249 | ||
ced72933 | 2250 | return crc; |
a73105b8 AQ |
2251 | } |
2252 | ||
56303d34 | 2253 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2254 | { |
7c26a53b ML |
2255 | struct batadv_tt_req_node *node; |
2256 | struct hlist_node *safe; | |
a73105b8 | 2257 | |
807736f6 | 2258 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2259 | |
7c26a53b ML |
2260 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
2261 | hlist_del_init(&node->list); | |
a73105b8 AQ |
2262 | kfree(node); |
2263 | } | |
2264 | ||
807736f6 | 2265 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2266 | } |
2267 | ||
56303d34 SE |
2268 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2269 | struct batadv_orig_node *orig_node, | |
e8cf234a | 2270 | const void *tt_buff, |
6b5e971a | 2271 | u16 tt_buff_len) |
a73105b8 | 2272 | { |
a73105b8 | 2273 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2274 | * last OGM (the OGM could carry no changes) |
2275 | */ | |
a73105b8 AQ |
2276 | spin_lock_bh(&orig_node->tt_buff_lock); |
2277 | if (tt_buff_len > 0) { | |
2278 | kfree(orig_node->tt_buff); | |
2279 | orig_node->tt_buff_len = 0; | |
2280 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2281 | if (orig_node->tt_buff) { | |
2282 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2283 | orig_node->tt_buff_len = tt_buff_len; | |
2284 | } | |
2285 | } | |
2286 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2287 | } | |
2288 | ||
56303d34 | 2289 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2290 | { |
7c26a53b ML |
2291 | struct batadv_tt_req_node *node; |
2292 | struct hlist_node *safe; | |
a73105b8 | 2293 | |
807736f6 | 2294 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2295 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
42d0b044 SE |
2296 | if (batadv_has_timed_out(node->issued_at, |
2297 | BATADV_TT_REQUEST_TIMEOUT)) { | |
7c26a53b | 2298 | hlist_del_init(&node->list); |
a73105b8 AQ |
2299 | kfree(node); |
2300 | } | |
2301 | } | |
807736f6 | 2302 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2303 | } |
2304 | ||
383b8636 ML |
2305 | /** |
2306 | * batadv_tt_req_node_new - search and possibly create a tt_req_node object | |
2307 | * @bat_priv: the bat priv with all the soft interface information | |
2308 | * @orig_node: orig node this request is being issued for | |
2309 | * | |
62fe710f | 2310 | * Return: the pointer to the new tt_req_node struct if no request |
383b8636 | 2311 | * has already been issued for this orig_node, NULL otherwise. |
9cfc7bd6 | 2312 | */ |
56303d34 | 2313 | static struct batadv_tt_req_node * |
383b8636 | 2314 | batadv_tt_req_node_new(struct batadv_priv *bat_priv, |
56303d34 | 2315 | struct batadv_orig_node *orig_node) |
a73105b8 | 2316 | { |
56303d34 | 2317 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2318 | |
807736f6 | 2319 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 2320 | hlist_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
1eda58bf SE |
2321 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2322 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2323 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2324 | goto unlock; |
2325 | } | |
2326 | ||
2327 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2328 | if (!tt_req_node) | |
2329 | goto unlock; | |
2330 | ||
8fdd0153 | 2331 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2332 | tt_req_node->issued_at = jiffies; |
2333 | ||
7c26a53b | 2334 | hlist_add_head(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2335 | unlock: |
807736f6 | 2336 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2337 | return tt_req_node; |
2338 | } | |
2339 | ||
335fbe0f ML |
2340 | /** |
2341 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2342 | * @entry_ptr: to be checked local tt entry | |
2343 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2344 | * | |
62fe710f | 2345 | * Return: 1 if the entry is a valid, 0 otherwise. |
335fbe0f ML |
2346 | */ |
2347 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2348 | { |
56303d34 | 2349 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2350 | |
acd34afa | 2351 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2352 | return 0; |
2353 | return 1; | |
2354 | } | |
2355 | ||
a513088d SE |
2356 | static int batadv_tt_global_valid(const void *entry_ptr, |
2357 | const void *data_ptr) | |
a73105b8 | 2358 | { |
56303d34 SE |
2359 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2360 | const struct batadv_tt_global_entry *tt_global_entry; | |
2361 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2362 | |
30cfd02b AQ |
2363 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2364 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2365 | return 0; |
2366 | ||
56303d34 SE |
2367 | tt_global_entry = container_of(tt_common_entry, |
2368 | struct batadv_tt_global_entry, | |
48100bac AQ |
2369 | common); |
2370 | ||
a513088d | 2371 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2372 | } |
2373 | ||
335fbe0f | 2374 | /** |
7ea7b4a1 AQ |
2375 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2376 | * specified tt hash | |
335fbe0f ML |
2377 | * @bat_priv: the bat priv with all the soft interface information |
2378 | * @hash: hash table containing the tt entries | |
2379 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2380 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2381 | * @valid_cb: function to filter tt change entries |
2382 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2383 | */ |
7ea7b4a1 AQ |
2384 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2385 | struct batadv_hashtable *hash, | |
6b5e971a | 2386 | void *tvlv_buff, u16 tt_len, |
7ea7b4a1 AQ |
2387 | int (*valid_cb)(const void *, const void *), |
2388 | void *cb_data) | |
a73105b8 | 2389 | { |
56303d34 | 2390 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2391 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2392 | struct hlist_head *head; |
6b5e971a SE |
2393 | u16 tt_tot, tt_num_entries = 0; |
2394 | u32 i; | |
a73105b8 | 2395 | |
298e6e68 | 2396 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2397 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2398 | |
2399 | rcu_read_lock(); | |
2400 | for (i = 0; i < hash->size; i++) { | |
2401 | head = &hash->table[i]; | |
2402 | ||
b67bfe0d | 2403 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2404 | head, hash_entry) { |
335fbe0f | 2405 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2406 | break; |
2407 | ||
48100bac | 2408 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2409 | continue; |
2410 | ||
8fdd0153 | 2411 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2412 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2413 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2414 | memset(tt_change->reserved, 0, |
2415 | sizeof(tt_change->reserved)); | |
a73105b8 | 2416 | |
335fbe0f | 2417 | tt_num_entries++; |
a73105b8 AQ |
2418 | tt_change++; |
2419 | } | |
2420 | } | |
2421 | rcu_read_unlock(); | |
7ea7b4a1 | 2422 | } |
a73105b8 | 2423 | |
7ea7b4a1 AQ |
2424 | /** |
2425 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2426 | * @orig_node: originator for which the CRCs have to be checked | |
2427 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2428 | * @num_vlan: number of tvlv VLAN entries | |
7ea7b4a1 | 2429 | * |
62fe710f | 2430 | * Return: true if all the received CRCs match the locally stored ones, false |
7ea7b4a1 AQ |
2431 | * otherwise |
2432 | */ | |
2433 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2434 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
6b5e971a | 2435 | u16 num_vlan) |
7ea7b4a1 AQ |
2436 | { |
2437 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2438 | struct batadv_orig_node_vlan *vlan; | |
c169c59d | 2439 | int i, orig_num_vlan; |
6b5e971a | 2440 | u32 crc; |
7ea7b4a1 AQ |
2441 | |
2442 | /* check if each received CRC matches the locally stored one */ | |
2443 | for (i = 0; i < num_vlan; i++) { | |
2444 | tt_vlan_tmp = tt_vlan + i; | |
2445 | ||
2446 | /* if orig_node is a backbone node for this VLAN, don't check | |
2447 | * the CRC as we ignore all the global entries over it | |
2448 | */ | |
2449 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2450 | orig_node->orig, |
2451 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2452 | continue; |
2453 | ||
2454 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2455 | ntohs(tt_vlan_tmp->vid)); | |
2456 | if (!vlan) | |
2457 | return false; | |
2458 | ||
91c2b1a9 AQ |
2459 | crc = vlan->tt.crc; |
2460 | batadv_orig_node_vlan_free_ref(vlan); | |
2461 | ||
2462 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2463 | return false; |
2464 | } | |
2465 | ||
c169c59d SW |
2466 | /* check if any excess VLANs exist locally for the originator |
2467 | * which are not mentioned in the TVLV from the originator. | |
2468 | */ | |
2469 | rcu_read_lock(); | |
2470 | orig_num_vlan = 0; | |
2471 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) | |
2472 | orig_num_vlan++; | |
2473 | rcu_read_unlock(); | |
2474 | ||
2475 | if (orig_num_vlan > num_vlan) | |
2476 | return false; | |
2477 | ||
7ea7b4a1 AQ |
2478 | return true; |
2479 | } | |
2480 | ||
2481 | /** | |
2482 | * batadv_tt_local_update_crc - update all the local CRCs | |
2483 | * @bat_priv: the bat priv with all the soft interface information | |
2484 | */ | |
2485 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2486 | { | |
2487 | struct batadv_softif_vlan *vlan; | |
2488 | ||
2489 | /* recompute the global CRC for each VLAN */ | |
2490 | rcu_read_lock(); | |
2491 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2492 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2493 | } | |
2494 | rcu_read_unlock(); | |
2495 | } | |
2496 | ||
2497 | /** | |
2498 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2499 | * @bat_priv: the bat priv with all the soft interface information | |
2500 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2501 | */ | |
2502 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2503 | struct batadv_orig_node *orig_node) | |
2504 | { | |
2505 | struct batadv_orig_node_vlan *vlan; | |
6b5e971a | 2506 | u32 crc; |
7ea7b4a1 AQ |
2507 | |
2508 | /* recompute the global CRC for each VLAN */ | |
2509 | rcu_read_lock(); | |
d0fa4f3f | 2510 | hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { |
7ea7b4a1 AQ |
2511 | /* if orig_node is a backbone node for this VLAN, don't compute |
2512 | * the CRC as we ignore all the global entries over it | |
2513 | */ | |
cfd4f757 AQ |
2514 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2515 | vlan->vid)) | |
7ea7b4a1 AQ |
2516 | continue; |
2517 | ||
2518 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2519 | vlan->tt.crc = crc; | |
2520 | } | |
2521 | rcu_read_unlock(); | |
a73105b8 AQ |
2522 | } |
2523 | ||
ced72933 AQ |
2524 | /** |
2525 | * batadv_send_tt_request - send a TT Request message to a given node | |
2526 | * @bat_priv: the bat priv with all the soft interface information | |
2527 | * @dst_orig_node: the destination of the message | |
2528 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2529 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2530 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2531 | * @full_table: ask for the entire translation table if true, while only for the |
2532 | * last TT diff otherwise | |
d15cd622 AQ |
2533 | * |
2534 | * Return: true if the TT Request was sent, false otherwise | |
ced72933 | 2535 | */ |
56303d34 SE |
2536 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2537 | struct batadv_orig_node *dst_orig_node, | |
6b5e971a | 2538 | u8 ttvn, |
7ea7b4a1 | 2539 | struct batadv_tvlv_tt_vlan_data *tt_vlan, |
6b5e971a | 2540 | u16 num_vlan, bool full_table) |
a73105b8 | 2541 | { |
335fbe0f | 2542 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2543 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2544 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2545 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2546 | bool ret = false; |
7ea7b4a1 | 2547 | int i, size; |
a73105b8 | 2548 | |
e5d89254 | 2549 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2550 | if (!primary_if) |
2551 | goto out; | |
2552 | ||
2553 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2554 | * reply from the same orig_node yet |
2555 | */ | |
383b8636 | 2556 | tt_req_node = batadv_tt_req_node_new(bat_priv, dst_orig_node); |
a73105b8 AQ |
2557 | if (!tt_req_node) |
2558 | goto out; | |
2559 | ||
7ea7b4a1 AQ |
2560 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2561 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2562 | if (!tvlv_tt_data) |
a73105b8 AQ |
2563 | goto out; |
2564 | ||
335fbe0f ML |
2565 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2566 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2567 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2568 | ||
2569 | /* send all the CRCs within the request. This is needed by intermediate | |
2570 | * nodes to ensure they have the correct table before replying | |
2571 | */ | |
2572 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2573 | for (i = 0; i < num_vlan; i++) { | |
2574 | tt_vlan_req->vid = tt_vlan->vid; | |
2575 | tt_vlan_req->crc = tt_vlan->crc; | |
2576 | ||
2577 | tt_vlan_req++; | |
2578 | tt_vlan++; | |
2579 | } | |
a73105b8 AQ |
2580 | |
2581 | if (full_table) | |
335fbe0f | 2582 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2583 | |
bb351ba0 | 2584 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2585 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2586 | |
d69909d2 | 2587 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2588 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2589 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2590 | tvlv_tt_data, size); |
335fbe0f | 2591 | ret = true; |
a73105b8 AQ |
2592 | |
2593 | out: | |
a73105b8 | 2594 | if (primary_if) |
e5d89254 | 2595 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2596 | if (ret && tt_req_node) { |
807736f6 | 2597 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b ML |
2598 | /* hlist_del_init() verifies tt_req_node still is in the list */ |
2599 | hlist_del_init(&tt_req_node->list); | |
807736f6 | 2600 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2601 | kfree(tt_req_node); |
2602 | } | |
335fbe0f | 2603 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2604 | return ret; |
2605 | } | |
2606 | ||
335fbe0f ML |
2607 | /** |
2608 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2609 | * node's translation table | |
2610 | * @bat_priv: the bat priv with all the soft interface information | |
2611 | * @tt_data: tt data containing the tt request information | |
2612 | * @req_src: mac address of tt request sender | |
2613 | * @req_dst: mac address of tt request recipient | |
2614 | * | |
62fe710f | 2615 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2616 | */ |
2617 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2618 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2619 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2620 | { |
170173bf | 2621 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2622 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2623 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2624 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2625 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2626 | bool ret = false, full_table; |
6b5e971a SE |
2627 | u8 orig_ttvn, req_ttvn; |
2628 | u16 tvlv_len; | |
2629 | s32 tt_len; | |
a73105b8 | 2630 | |
39c75a51 | 2631 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2632 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f | 2633 | req_src, tt_data->ttvn, req_dst, |
a2f2b6cd | 2634 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 AQ |
2635 | |
2636 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2637 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2638 | if (!req_dst_orig_node) |
2639 | goto out; | |
2640 | ||
335fbe0f | 2641 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2642 | if (!res_dst_orig_node) |
2643 | goto out; | |
2644 | ||
6b5e971a | 2645 | orig_ttvn = (u8)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2646 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2647 | |
7ea7b4a1 | 2648 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2649 | /* this node doesn't have the requested data */ |
a73105b8 | 2650 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2651 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2652 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2653 | goto out; |
2654 | ||
015758d0 | 2655 | /* If the full table has been explicitly requested */ |
335fbe0f | 2656 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2657 | !req_dst_orig_node->tt_buff) |
2658 | full_table = true; | |
2659 | else | |
2660 | full_table = false; | |
2661 | ||
335fbe0f ML |
2662 | /* TT fragmentation hasn't been implemented yet, so send as many |
2663 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2664 | */ |
a73105b8 AQ |
2665 | if (!full_table) { |
2666 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2667 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2668 | |
7ea7b4a1 AQ |
2669 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2670 | &tvlv_tt_data, | |
2671 | &tt_change, | |
2672 | &tt_len); | |
2673 | if (!tt_len) | |
a73105b8 AQ |
2674 | goto unlock; |
2675 | ||
a73105b8 | 2676 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2677 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2678 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2679 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2680 | } else { | |
7ea7b4a1 AQ |
2681 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2682 | * in the initial part | |
2683 | */ | |
2684 | tt_len = -1; | |
2685 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2686 | &tvlv_tt_data, | |
2687 | &tt_change, | |
2688 | &tt_len); | |
2689 | if (!tt_len) | |
a73105b8 | 2690 | goto out; |
7ea7b4a1 AQ |
2691 | |
2692 | /* fill the rest of the tvlv with the real TT entries */ | |
2693 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2694 | tt_change, tt_len, | |
2695 | batadv_tt_global_valid, | |
2696 | req_dst_orig_node); | |
a73105b8 AQ |
2697 | } |
2698 | ||
a19d3d85 ML |
2699 | /* Don't send the response, if larger than fragmented packet. */ |
2700 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2701 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2702 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2703 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2704 | res_dst_orig_node->orig); | |
2705 | goto out; | |
2706 | } | |
2707 | ||
335fbe0f ML |
2708 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2709 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2710 | |
2711 | if (full_table) | |
335fbe0f | 2712 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2713 | |
39c75a51 | 2714 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2715 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2716 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2717 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2718 | |
d69909d2 | 2719 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2720 | |
335fbe0f | 2721 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2722 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2723 | tvlv_len); | |
e91ecfc6 | 2724 | |
335fbe0f | 2725 | ret = true; |
a73105b8 AQ |
2726 | goto out; |
2727 | ||
2728 | unlock: | |
2729 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2730 | ||
2731 | out: | |
2732 | if (res_dst_orig_node) | |
7d211efc | 2733 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2734 | if (req_dst_orig_node) |
7d211efc | 2735 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2736 | kfree(tvlv_tt_data); |
a73105b8 | 2737 | return ret; |
a73105b8 | 2738 | } |
96412690 | 2739 | |
335fbe0f ML |
2740 | /** |
2741 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2742 | * translation table | |
2743 | * @bat_priv: the bat priv with all the soft interface information | |
2744 | * @tt_data: tt data containing the tt request information | |
2745 | * @req_src: mac address of tt request sender | |
2746 | * | |
62fe710f | 2747 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2748 | */ |
2749 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2750 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2751 | u8 *req_src) |
a73105b8 | 2752 | { |
335fbe0f | 2753 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2754 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2755 | struct batadv_tvlv_tt_change *tt_change; |
2756 | struct batadv_orig_node *orig_node; | |
6b5e971a SE |
2757 | u8 my_ttvn, req_ttvn; |
2758 | u16 tvlv_len; | |
a73105b8 | 2759 | bool full_table; |
6b5e971a | 2760 | s32 tt_len; |
a73105b8 | 2761 | |
39c75a51 | 2762 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2763 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f | 2764 | req_src, tt_data->ttvn, |
a2f2b6cd | 2765 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 2766 | |
a70a9aa9 | 2767 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2768 | |
6b5e971a | 2769 | my_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2770 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2771 | |
335fbe0f | 2772 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2773 | if (!orig_node) |
2774 | goto out; | |
2775 | ||
e5d89254 | 2776 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2777 | if (!primary_if) |
2778 | goto out; | |
2779 | ||
2780 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2781 | * is too big send the whole local translation table |
2782 | */ | |
335fbe0f | 2783 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2784 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2785 | full_table = true; |
2786 | else | |
2787 | full_table = false; | |
2788 | ||
335fbe0f ML |
2789 | /* TT fragmentation hasn't been implemented yet, so send as many |
2790 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2791 | */ |
a73105b8 | 2792 | if (!full_table) { |
807736f6 | 2793 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2794 | |
7ea7b4a1 AQ |
2795 | tt_len = bat_priv->tt.last_changeset_len; |
2796 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2797 | &tvlv_tt_data, | |
2798 | &tt_change, | |
2799 | &tt_len); | |
2800 | if (!tt_len) | |
a73105b8 AQ |
2801 | goto unlock; |
2802 | ||
335fbe0f | 2803 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2804 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2805 | bat_priv->tt.last_changeset_len); |
2806 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2807 | } else { |
6b5e971a | 2808 | req_ttvn = (u8)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2809 | |
7ea7b4a1 AQ |
2810 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2811 | * in the initial part | |
2812 | */ | |
2813 | tt_len = -1; | |
2814 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2815 | &tvlv_tt_data, | |
2816 | &tt_change, | |
2817 | &tt_len); | |
2818 | if (!tt_len) | |
a73105b8 | 2819 | goto out; |
7ea7b4a1 AQ |
2820 | |
2821 | /* fill the rest of the tvlv with the real TT entries */ | |
2822 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2823 | tt_change, tt_len, | |
2824 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2825 | } |
2826 | ||
335fbe0f ML |
2827 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2828 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2829 | |
2830 | if (full_table) | |
335fbe0f | 2831 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2832 | |
39c75a51 | 2833 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2834 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2835 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2836 | |
d69909d2 | 2837 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2838 | |
335fbe0f | 2839 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2840 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2841 | tvlv_len); | |
335fbe0f | 2842 | |
a73105b8 AQ |
2843 | goto out; |
2844 | ||
2845 | unlock: | |
807736f6 | 2846 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2847 | out: |
a70a9aa9 | 2848 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2849 | if (orig_node) |
7d211efc | 2850 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2851 | if (primary_if) |
e5d89254 | 2852 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2853 | kfree(tvlv_tt_data); |
2854 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2855 | return true; |
2856 | } | |
2857 | ||
335fbe0f ML |
2858 | /** |
2859 | * batadv_send_tt_response - send reply to tt request | |
2860 | * @bat_priv: the bat priv with all the soft interface information | |
2861 | * @tt_data: tt data containing the tt request information | |
2862 | * @req_src: mac address of tt request sender | |
2863 | * @req_dst: mac address of tt request recipient | |
2864 | * | |
62fe710f | 2865 | * Return: true if tt request reply was sent, false otherwise. |
335fbe0f ML |
2866 | */ |
2867 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2868 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2869 | u8 *req_src, u8 *req_dst) |
a73105b8 | 2870 | { |
cfd4f757 | 2871 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2872 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
24820df1 AQ |
2873 | return batadv_send_other_tt_response(bat_priv, tt_data, req_src, |
2874 | req_dst); | |
a73105b8 AQ |
2875 | } |
2876 | ||
56303d34 SE |
2877 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2878 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2879 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 2880 | u16 tt_num_changes, u8 ttvn) |
a73105b8 AQ |
2881 | { |
2882 | int i; | |
a513088d | 2883 | int roams; |
a73105b8 AQ |
2884 | |
2885 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2886 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2887 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2888 | batadv_tt_global_del(bat_priv, orig_node, |
2889 | (tt_change + i)->addr, | |
c018ad3d | 2890 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2891 | "tt removed by changes", |
2892 | roams); | |
08c36d3e | 2893 | } else { |
08c36d3e | 2894 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2895 | (tt_change + i)->addr, |
c018ad3d | 2896 | ntohs((tt_change + i)->vid), |
d4f44692 | 2897 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2898 | /* In case of problem while storing a |
2899 | * global_entry, we stop the updating | |
2900 | * procedure without committing the | |
2901 | * ttvn change. This will avoid to send | |
2902 | * corrupted data on tt_request | |
2903 | */ | |
2904 | return; | |
08c36d3e | 2905 | } |
a73105b8 | 2906 | } |
ac4eebd4 | 2907 | set_bit(BATADV_ORIG_CAPA_HAS_TT, &orig_node->capa_initialized); |
a73105b8 AQ |
2908 | } |
2909 | ||
56303d34 | 2910 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 | 2911 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a SE |
2912 | u8 ttvn, u8 *resp_src, |
2913 | u16 num_entries) | |
a73105b8 | 2914 | { |
170173bf | 2915 | struct batadv_orig_node *orig_node; |
a73105b8 | 2916 | |
335fbe0f | 2917 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2918 | if (!orig_node) |
2919 | goto out; | |
2920 | ||
2921 | /* Purge the old table first.. */ | |
95fb130d AQ |
2922 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2923 | "Received full table"); | |
a73105b8 | 2924 | |
7ea7b4a1 AQ |
2925 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2926 | ttvn); | |
a73105b8 AQ |
2927 | |
2928 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2929 | kfree(orig_node->tt_buff); | |
2930 | orig_node->tt_buff_len = 0; | |
2931 | orig_node->tt_buff = NULL; | |
2932 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2933 | ||
7ea7b4a1 | 2934 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2935 | |
2936 | out: | |
2937 | if (orig_node) | |
7d211efc | 2938 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2939 | } |
2940 | ||
56303d34 SE |
2941 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2942 | struct batadv_orig_node *orig_node, | |
6b5e971a | 2943 | u16 tt_num_changes, u8 ttvn, |
335fbe0f | 2944 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2945 | { |
a513088d SE |
2946 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2947 | tt_num_changes, ttvn); | |
a73105b8 | 2948 | |
e8cf234a AQ |
2949 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2950 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2951 | atomic_set(&orig_node->last_ttvn, ttvn); |
2952 | } | |
2953 | ||
c018ad3d AQ |
2954 | /** |
2955 | * batadv_is_my_client - check if a client is served by the local node | |
2956 | * @bat_priv: the bat priv with all the soft interface information | |
3f68785e | 2957 | * @addr: the mac address of the client to check |
c018ad3d AQ |
2958 | * @vid: VLAN identifier |
2959 | * | |
62fe710f | 2960 | * Return: true if the client is served by this node, false otherwise. |
c018ad3d | 2961 | */ |
6b5e971a | 2962 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const u8 *addr, |
c018ad3d | 2963 | unsigned short vid) |
a73105b8 | 2964 | { |
170173bf | 2965 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2966 | bool ret = false; |
a73105b8 | 2967 | |
c018ad3d | 2968 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2969 | if (!tt_local_entry) |
2970 | goto out; | |
058d0e26 | 2971 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2972 | * consistency purpose) |
2973 | */ | |
7c1fd91d AQ |
2974 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2975 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2976 | goto out; |
7683fdc1 AQ |
2977 | ret = true; |
2978 | out: | |
a73105b8 | 2979 | if (tt_local_entry) |
a513088d | 2980 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2981 | return ret; |
a73105b8 AQ |
2982 | } |
2983 | ||
335fbe0f ML |
2984 | /** |
2985 | * batadv_handle_tt_response - process incoming tt reply | |
2986 | * @bat_priv: the bat priv with all the soft interface information | |
2987 | * @tt_data: tt data containing the tt request information | |
2988 | * @resp_src: mac address of tt reply sender | |
2989 | * @num_entries: number of tt change entries appended to the tt data | |
2990 | */ | |
2991 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2992 | struct batadv_tvlv_tt_data *tt_data, | |
6b5e971a | 2993 | u8 *resp_src, u16 num_entries) |
a73105b8 | 2994 | { |
7c26a53b ML |
2995 | struct batadv_tt_req_node *node; |
2996 | struct hlist_node *safe; | |
56303d34 | 2997 | struct batadv_orig_node *orig_node = NULL; |
335fbe0f | 2998 | struct batadv_tvlv_tt_change *tt_change; |
6b5e971a SE |
2999 | u8 *tvlv_ptr = (u8 *)tt_data; |
3000 | u16 change_offset; | |
a73105b8 | 3001 | |
39c75a51 | 3002 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3003 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f | 3004 | resp_src, tt_data->ttvn, num_entries, |
a2f2b6cd | 3005 | ((tt_data->flags & BATADV_TT_FULL_TABLE) ? 'F' : '.')); |
a73105b8 | 3006 | |
335fbe0f | 3007 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
3008 | if (!orig_node) |
3009 | goto out; | |
3010 | ||
a70a9aa9 AQ |
3011 | spin_lock_bh(&orig_node->tt_lock); |
3012 | ||
7ea7b4a1 AQ |
3013 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
3014 | change_offset *= ntohs(tt_data->num_vlan); | |
3015 | change_offset += sizeof(*tt_data); | |
3016 | tvlv_ptr += change_offset; | |
3017 | ||
3018 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 3019 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
3020 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
3021 | resp_src, num_entries); | |
96412690 | 3022 | } else { |
335fbe0f ML |
3023 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
3024 | tt_data->ttvn, tt_change); | |
96412690 | 3025 | } |
a73105b8 | 3026 | |
a70a9aa9 | 3027 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 3028 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
3029 | |
3030 | spin_unlock_bh(&orig_node->tt_lock); | |
3031 | ||
a73105b8 | 3032 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 | 3033 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
7c26a53b | 3034 | hlist_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
335fbe0f | 3035 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 | 3036 | continue; |
7c26a53b | 3037 | hlist_del_init(&node->list); |
a73105b8 AQ |
3038 | kfree(node); |
3039 | } | |
7ea7b4a1 | 3040 | |
807736f6 | 3041 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
3042 | out: |
3043 | if (orig_node) | |
7d211efc | 3044 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
3045 | } |
3046 | ||
56303d34 | 3047 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 3048 | { |
56303d34 | 3049 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 3050 | |
807736f6 | 3051 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 3052 | |
807736f6 | 3053 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
3054 | list_del(&node->list); |
3055 | kfree(node); | |
3056 | } | |
3057 | ||
807736f6 | 3058 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3059 | } |
3060 | ||
56303d34 | 3061 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 3062 | { |
56303d34 | 3063 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 3064 | |
807736f6 SE |
3065 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
3066 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
3067 | if (!batadv_has_timed_out(node->first_time, |
3068 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
3069 | continue; |
3070 | ||
3071 | list_del(&node->list); | |
3072 | kfree(node); | |
3073 | } | |
807736f6 | 3074 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3075 | } |
3076 | ||
62fe710f | 3077 | /** |
d15cd622 AQ |
3078 | * batadv_tt_check_roam_count - check if a client has roamed too frequently |
3079 | * @bat_priv: the bat priv with all the soft interface information | |
3080 | * @client: mac address of the roaming client | |
62fe710f SE |
3081 | * |
3082 | * This function checks whether the client already reached the | |
cc47f66e AQ |
3083 | * maximum number of possible roaming phases. In this case the ROAMING_ADV |
3084 | * will not be sent. | |
3085 | * | |
62fe710f | 3086 | * Return: true if the ROAMING_ADV can be sent, false otherwise |
9cfc7bd6 | 3087 | */ |
6b5e971a | 3088 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, u8 *client) |
cc47f66e | 3089 | { |
56303d34 | 3090 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
3091 | bool ret = false; |
3092 | ||
807736f6 | 3093 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 3094 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
3095 | * reply from the same orig_node yet |
3096 | */ | |
807736f6 | 3097 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 3098 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
3099 | continue; |
3100 | ||
1eda58bf | 3101 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 3102 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
3103 | continue; |
3104 | ||
3e34819e | 3105 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
3106 | /* Sorry, you roamed too many times! */ |
3107 | goto unlock; | |
3108 | ret = true; | |
3109 | break; | |
3110 | } | |
3111 | ||
3112 | if (!ret) { | |
3113 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
3114 | if (!tt_roam_node) | |
3115 | goto unlock; | |
3116 | ||
3117 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
3118 | atomic_set(&tt_roam_node->counter, |
3119 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 3120 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 3121 | |
807736f6 | 3122 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
3123 | ret = true; |
3124 | } | |
3125 | ||
3126 | unlock: | |
807736f6 | 3127 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3128 | return ret; |
3129 | } | |
3130 | ||
c018ad3d AQ |
3131 | /** |
3132 | * batadv_send_roam_adv - send a roaming advertisement message | |
3133 | * @bat_priv: the bat priv with all the soft interface information | |
3134 | * @client: mac address of the roaming client | |
3135 | * @vid: VLAN identifier | |
3136 | * @orig_node: message destination | |
3137 | * | |
3138 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3139 | * client. This is done to inform the node that from now on all traffic destined | |
3140 | * for this particular roamed client has to be forwarded to the sender of the | |
3141 | * roaming message. | |
3142 | */ | |
6b5e971a | 3143 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client, |
c018ad3d | 3144 | unsigned short vid, |
56303d34 | 3145 | struct batadv_orig_node *orig_node) |
cc47f66e | 3146 | { |
56303d34 | 3147 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3148 | struct batadv_tvlv_roam_adv tvlv_roam; |
3149 | ||
3150 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3151 | if (!primary_if) | |
3152 | goto out; | |
cc47f66e AQ |
3153 | |
3154 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3155 | * already roamed to us too many times |
3156 | */ | |
a513088d | 3157 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3158 | goto out; |
3159 | ||
39c75a51 | 3160 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3161 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3162 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3163 | |
d69909d2 | 3164 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3165 | |
122edaa0 | 3166 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3167 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3168 | |
3169 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3170 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3171 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3172 | |
3173 | out: | |
122edaa0 ML |
3174 | if (primary_if) |
3175 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
3176 | } |
3177 | ||
a513088d | 3178 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3179 | { |
56303d34 | 3180 | struct delayed_work *delayed_work; |
807736f6 | 3181 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3182 | struct batadv_priv *bat_priv; |
3183 | ||
3184 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3185 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3186 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3187 | |
a19d3d85 | 3188 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3189 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3190 | batadv_tt_req_purge(bat_priv); |
3191 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3192 | |
72414442 AQ |
3193 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3194 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3195 | } |
cc47f66e | 3196 | |
56303d34 | 3197 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3198 | { |
e1bf0c14 ML |
3199 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3200 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3201 | ||
807736f6 | 3202 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3203 | |
a513088d SE |
3204 | batadv_tt_local_table_free(bat_priv); |
3205 | batadv_tt_global_table_free(bat_priv); | |
3206 | batadv_tt_req_list_free(bat_priv); | |
3207 | batadv_tt_changes_list_free(bat_priv); | |
3208 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3209 | |
807736f6 | 3210 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3211 | } |
058d0e26 | 3212 | |
7ea7b4a1 AQ |
3213 | /** |
3214 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3215 | * table and possibly count them in the TT size | |
3216 | * @bat_priv: the bat priv with all the soft interface information | |
3217 | * @flags: the flag to switch | |
3218 | * @enable: whether to set or unset the flag | |
3219 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3220 | */ |
6b5e971a SE |
3221 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, u16 flags, |
3222 | bool enable, bool count) | |
058d0e26 | 3223 | { |
7ea7b4a1 AQ |
3224 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3225 | struct batadv_tt_common_entry *tt_common_entry; | |
6b5e971a | 3226 | u16 changed_num = 0; |
058d0e26 | 3227 | struct hlist_head *head; |
6b5e971a | 3228 | u32 i; |
058d0e26 AQ |
3229 | |
3230 | if (!hash) | |
7ea7b4a1 | 3231 | return; |
058d0e26 AQ |
3232 | |
3233 | for (i = 0; i < hash->size; i++) { | |
3234 | head = &hash->table[i]; | |
3235 | ||
3236 | rcu_read_lock(); | |
b67bfe0d | 3237 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3238 | head, hash_entry) { |
697f2531 AQ |
3239 | if (enable) { |
3240 | if ((tt_common_entry->flags & flags) == flags) | |
3241 | continue; | |
3242 | tt_common_entry->flags |= flags; | |
3243 | } else { | |
3244 | if (!(tt_common_entry->flags & flags)) | |
3245 | continue; | |
3246 | tt_common_entry->flags &= ~flags; | |
3247 | } | |
3248 | changed_num++; | |
7ea7b4a1 AQ |
3249 | |
3250 | if (!count) | |
3251 | continue; | |
3252 | ||
3253 | batadv_tt_local_size_inc(bat_priv, | |
3254 | tt_common_entry->vid); | |
058d0e26 AQ |
3255 | } |
3256 | rcu_read_unlock(); | |
3257 | } | |
058d0e26 AQ |
3258 | } |
3259 | ||
acd34afa | 3260 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3261 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3262 | { |
807736f6 | 3263 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3264 | struct batadv_tt_common_entry *tt_common; |
3265 | struct batadv_tt_local_entry *tt_local; | |
35df3b29 | 3266 | struct batadv_softif_vlan *vlan; |
b67bfe0d | 3267 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3268 | struct hlist_head *head; |
3269 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
6b5e971a | 3270 | u32 i; |
058d0e26 AQ |
3271 | |
3272 | if (!hash) | |
3273 | return; | |
3274 | ||
3275 | for (i = 0; i < hash->size; i++) { | |
3276 | head = &hash->table[i]; | |
3277 | list_lock = &hash->list_locks[i]; | |
3278 | ||
3279 | spin_lock_bh(list_lock); | |
b67bfe0d | 3280 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3281 | hash_entry) { |
3282 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3283 | continue; |
3284 | ||
39c75a51 | 3285 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3286 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3287 | tt_common->addr, | |
3288 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3289 | |
7ea7b4a1 | 3290 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3291 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3292 | tt_local = container_of(tt_common, |
3293 | struct batadv_tt_local_entry, | |
3294 | common); | |
35df3b29 AQ |
3295 | |
3296 | /* decrease the reference held for this vlan */ | |
3297 | vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid); | |
354136bc ML |
3298 | if (vlan) { |
3299 | batadv_softif_vlan_free_ref(vlan); | |
3300 | batadv_softif_vlan_free_ref(vlan); | |
3301 | } | |
35df3b29 | 3302 | |
56303d34 | 3303 | batadv_tt_local_entry_free_ref(tt_local); |
058d0e26 AQ |
3304 | } |
3305 | spin_unlock_bh(list_lock); | |
3306 | } | |
058d0e26 AQ |
3307 | } |
3308 | ||
e1bf0c14 | 3309 | /** |
a19d3d85 ML |
3310 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3311 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3312 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3313 | * |
3314 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3315 | */ |
a19d3d85 | 3316 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3317 | { |
5274cd68 SE |
3318 | lockdep_assert_held(&bat_priv->tt.commit_lock); |
3319 | ||
c5caf4ef LL |
3320 | /* Update multicast addresses in local translation table */ |
3321 | batadv_mcast_mla_update(bat_priv); | |
3322 | ||
e1bf0c14 ML |
3323 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3324 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3325 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3326 | return; |
e1bf0c14 | 3327 | } |
be9aa4c1 | 3328 | |
7ea7b4a1 | 3329 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3330 | |
a513088d | 3331 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3332 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3333 | |
3334 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3335 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3336 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3337 | "Local changes committed, updating to ttvn %u\n", |
6b5e971a | 3338 | (u8)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3339 | |
3340 | /* reset the sending counter */ | |
807736f6 | 3341 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3342 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3343 | } |
a70a9aa9 | 3344 | |
a19d3d85 ML |
3345 | /** |
3346 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3347 | * have been queued in the time since the last commit | |
3348 | * @bat_priv: the bat priv with all the soft interface information | |
3349 | */ | |
3350 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3351 | { | |
3352 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3353 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3354 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3355 | } |
59b699cd | 3356 | |
6b5e971a SE |
3357 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, u8 *src, u8 *dst, |
3358 | unsigned short vid) | |
59b699cd | 3359 | { |
56303d34 SE |
3360 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3361 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3362 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3363 | bool ret = false; |
59b699cd | 3364 | |
b8cbd81d | 3365 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
e087f34f ME |
3366 | if (!vlan) |
3367 | return false; | |
3368 | ||
3369 | if (!atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3370 | goto out; |
59b699cd | 3371 | |
b8cbd81d | 3372 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3373 | if (!tt_local_entry) |
3374 | goto out; | |
3375 | ||
b8cbd81d | 3376 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3377 | if (!tt_global_entry) |
3378 | goto out; | |
3379 | ||
1f129fef | 3380 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3381 | goto out; |
3382 | ||
5870adc6 | 3383 | ret = true; |
59b699cd AQ |
3384 | |
3385 | out: | |
f75a33ae | 3386 | batadv_softif_vlan_free_ref(vlan); |
59b699cd | 3387 | if (tt_global_entry) |
a513088d | 3388 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3389 | if (tt_local_entry) |
a513088d | 3390 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3391 | return ret; |
3392 | } | |
a943cac1 | 3393 | |
e1bf0c14 ML |
3394 | /** |
3395 | * batadv_tt_update_orig - update global translation table with new tt | |
3396 | * information received via ogms | |
3397 | * @bat_priv: the bat priv with all the soft interface information | |
e51f0397 SE |
3398 | * @orig_node: the orig_node of the ogm |
3399 | * @tt_buff: pointer to the first tvlv VLAN entry | |
7ea7b4a1 AQ |
3400 | * @tt_num_vlan: number of tvlv VLAN entries |
3401 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3402 | * @tt_num_changes: number of tt changes inside the tt buffer |
3403 | * @ttvn: translation table version number of this changeset | |
e1bf0c14 ML |
3404 | */ |
3405 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3406 | struct batadv_orig_node *orig_node, | |
6b5e971a | 3407 | const void *tt_buff, u16 tt_num_vlan, |
7ea7b4a1 | 3408 | struct batadv_tvlv_tt_change *tt_change, |
6b5e971a | 3409 | u16 tt_num_changes, u8 ttvn) |
a943cac1 | 3410 | { |
6b5e971a | 3411 | u8 orig_ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
7ea7b4a1 | 3412 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3413 | bool full_table = true; |
e17931d1 | 3414 | bool has_tt_init; |
a943cac1 | 3415 | |
7ea7b4a1 | 3416 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
ac4eebd4 LL |
3417 | has_tt_init = test_bit(BATADV_ORIG_CAPA_HAS_TT, |
3418 | &orig_node->capa_initialized); | |
e17931d1 | 3419 | |
17071578 | 3420 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3421 | * increased by one -> we can apply the attached changes |
3422 | */ | |
e17931d1 | 3423 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3424 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3425 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3426 | * times. | |
9cfc7bd6 SE |
3427 | * In this case send a tt request |
3428 | */ | |
a943cac1 ML |
3429 | if (!tt_num_changes) { |
3430 | full_table = false; | |
3431 | goto request_table; | |
3432 | } | |
3433 | ||
a70a9aa9 AQ |
3434 | spin_lock_bh(&orig_node->tt_lock); |
3435 | ||
a513088d | 3436 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3437 | ttvn, tt_change); |
a943cac1 ML |
3438 | |
3439 | /* Even if we received the precomputed crc with the OGM, we | |
3440 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3441 | * in the global table |
3442 | */ | |
7ea7b4a1 | 3443 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3444 | |
a70a9aa9 AQ |
3445 | spin_unlock_bh(&orig_node->tt_lock); |
3446 | ||
a943cac1 ML |
3447 | /* The ttvn alone is not enough to guarantee consistency |
3448 | * because a single value could represent different states | |
3449 | * (due to the wrap around). Thus a node has to check whether | |
3450 | * the resulting table (after applying the changes) is still | |
3451 | * consistent or not. E.g. a node could disconnect while its | |
3452 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3453 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3454 | * inconsistency |
3455 | */ | |
7ea7b4a1 AQ |
3456 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3457 | tt_num_vlan)) | |
a943cac1 | 3458 | goto request_table; |
a943cac1 ML |
3459 | } else { |
3460 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3461 | * in sync anymore -> request fresh tt data |
3462 | */ | |
e17931d1 | 3463 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3464 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3465 | tt_num_vlan)) { | |
a943cac1 | 3466 | request_table: |
39c75a51 | 3467 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3468 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3469 | orig_node->orig, ttvn, orig_ttvn, | |
3470 | tt_num_changes); | |
a513088d | 3471 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3472 | tt_vlan, tt_num_vlan, |
3473 | full_table); | |
a943cac1 ML |
3474 | return; |
3475 | } | |
3476 | } | |
3477 | } | |
3275e7cc | 3478 | |
c018ad3d AQ |
3479 | /** |
3480 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3481 | * @bat_priv: the bat priv with all the soft interface information | |
3482 | * @addr: the mac address of the client to check | |
3483 | * @vid: VLAN identifier | |
3484 | * | |
62fe710f | 3485 | * Return: true if we know that the client has moved from its old originator |
c018ad3d AQ |
3486 | * to another one. This entry is still kept for consistency purposes and will be |
3487 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3488 | */ |
56303d34 | 3489 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
6b5e971a | 3490 | u8 *addr, unsigned short vid) |
3275e7cc | 3491 | { |
56303d34 | 3492 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3493 | bool ret = false; |
3494 | ||
c018ad3d | 3495 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3496 | if (!tt_global_entry) |
3497 | goto out; | |
3498 | ||
c1d07431 | 3499 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3500 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3501 | out: |
3502 | return ret; | |
3503 | } | |
30cfd02b | 3504 | |
7c1fd91d AQ |
3505 | /** |
3506 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3507 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3508 | * @addr: the mac address of the local client to query |
3509 | * @vid: VLAN identifier | |
7c1fd91d | 3510 | * |
62fe710f | 3511 | * Return: true if the local client is known to be roaming (it is not served by |
7c1fd91d AQ |
3512 | * this node anymore) or not. If yes, the client is still present in the table |
3513 | * to keep the latter consistent with the node TTVN | |
3514 | */ | |
3515 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
6b5e971a | 3516 | u8 *addr, unsigned short vid) |
7c1fd91d AQ |
3517 | { |
3518 | struct batadv_tt_local_entry *tt_local_entry; | |
3519 | bool ret = false; | |
3520 | ||
c018ad3d | 3521 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3522 | if (!tt_local_entry) |
3523 | goto out; | |
3524 | ||
3525 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3526 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3527 | out: | |
3528 | return ret; | |
7c1fd91d AQ |
3529 | } |
3530 | ||
30cfd02b AQ |
3531 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3532 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3533 | const unsigned char *addr, |
16052789 | 3534 | unsigned short vid) |
30cfd02b AQ |
3535 | { |
3536 | bool ret = false; | |
3537 | ||
16052789 | 3538 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3539 | BATADV_TT_CLIENT_TEMP, |
3540 | atomic_read(&orig_node->last_ttvn))) | |
3541 | goto out; | |
3542 | ||
3543 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3544 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3545 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3546 | ret = true; |
3547 | out: | |
3548 | return ret; | |
3549 | } | |
e1bf0c14 | 3550 | |
a19d3d85 ML |
3551 | /** |
3552 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3553 | * maximum packet size that can be transported through the mesh | |
3554 | * @soft_iface: netdev struct of the mesh interface | |
3555 | * | |
3556 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3557 | * to be removed. | |
3558 | */ | |
3559 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3560 | { | |
3561 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3562 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3563 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3564 | bool reduced = false; | |
3565 | ||
3566 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3567 | ||
3568 | while (true) { | |
3569 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3570 | if (packet_size_max >= table_size) | |
3571 | break; | |
3572 | ||
3573 | batadv_tt_local_purge(bat_priv, timeout); | |
3574 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3575 | ||
3576 | timeout /= 2; | |
3577 | reduced = true; | |
3578 | net_ratelimited_function(batadv_info, soft_iface, | |
3579 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3580 | packet_size_max); | |
3581 | } | |
3582 | ||
3583 | /* commit these changes immediately, to avoid synchronization problem | |
3584 | * with the TTVN | |
3585 | */ | |
3586 | if (reduced) | |
3587 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3588 | ||
3589 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3590 | } | |
3591 | ||
e1bf0c14 ML |
3592 | /** |
3593 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3594 | * @bat_priv: the bat priv with all the soft interface information | |
3595 | * @orig: the orig_node of the ogm | |
3596 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3597 | * @tvlv_value: tvlv buffer containing the gateway data | |
3598 | * @tvlv_value_len: tvlv buffer length | |
3599 | */ | |
3600 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3601 | struct batadv_orig_node *orig, | |
6b5e971a SE |
3602 | u8 flags, void *tvlv_value, |
3603 | u16 tvlv_value_len) | |
e1bf0c14 | 3604 | { |
7ea7b4a1 AQ |
3605 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3606 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3607 | struct batadv_tvlv_tt_data *tt_data; |
6b5e971a | 3608 | u16 num_entries, num_vlan; |
e1bf0c14 ML |
3609 | |
3610 | if (tvlv_value_len < sizeof(*tt_data)) | |
3611 | return; | |
3612 | ||
3613 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3614 | tvlv_value_len -= sizeof(*tt_data); | |
3615 | ||
7ea7b4a1 AQ |
3616 | num_vlan = ntohs(tt_data->num_vlan); |
3617 | ||
3618 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3619 | return; | |
3620 | ||
3621 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3622 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3623 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3624 | ||
298e6e68 | 3625 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3626 | |
7ea7b4a1 AQ |
3627 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3628 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3629 | } |
3630 | ||
335fbe0f ML |
3631 | /** |
3632 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3633 | * container | |
3634 | * @bat_priv: the bat priv with all the soft interface information | |
3635 | * @src: mac address of tt tvlv sender | |
3636 | * @dst: mac address of tt tvlv recipient | |
3637 | * @tvlv_value: tvlv buffer containing the tt data | |
3638 | * @tvlv_value_len: tvlv buffer length | |
3639 | * | |
62fe710f | 3640 | * Return: NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS |
335fbe0f ML |
3641 | * otherwise. |
3642 | */ | |
3643 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3644 | u8 *src, u8 *dst, |
335fbe0f | 3645 | void *tvlv_value, |
6b5e971a | 3646 | u16 tvlv_value_len) |
335fbe0f ML |
3647 | { |
3648 | struct batadv_tvlv_tt_data *tt_data; | |
6b5e971a | 3649 | u16 tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3650 | char tt_flag; |
3651 | bool ret; | |
3652 | ||
3653 | if (tvlv_value_len < sizeof(*tt_data)) | |
3654 | return NET_RX_SUCCESS; | |
3655 | ||
3656 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3657 | tvlv_value_len -= sizeof(*tt_data); | |
3658 | ||
7ea7b4a1 AQ |
3659 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3660 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3661 | ||
3662 | if (tvlv_value_len < tt_vlan_len) | |
3663 | return NET_RX_SUCCESS; | |
3664 | ||
3665 | tvlv_value_len -= tt_vlan_len; | |
3666 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3667 | |
3668 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3669 | case BATADV_TT_REQUEST: | |
3670 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3671 | ||
3672 | /* If this node cannot provide a TT response the tt_request is | |
3673 | * forwarded | |
3674 | */ | |
3675 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3676 | if (!ret) { | |
3677 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3678 | tt_flag = 'F'; | |
3679 | else | |
3680 | tt_flag = '.'; | |
3681 | ||
3682 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3683 | "Routing TT_REQUEST to %pM [%c]\n", | |
3684 | dst, tt_flag); | |
3685 | /* tvlv API will re-route the packet */ | |
3686 | return NET_RX_DROP; | |
3687 | } | |
3688 | break; | |
3689 | case BATADV_TT_RESPONSE: | |
3690 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3691 | ||
3692 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3693 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3694 | src, tt_num_entries); |
335fbe0f ML |
3695 | return NET_RX_SUCCESS; |
3696 | } | |
3697 | ||
3698 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3699 | tt_flag = 'F'; | |
3700 | else | |
3701 | tt_flag = '.'; | |
3702 | ||
3703 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3704 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3705 | ||
3706 | /* tvlv API will re-route the packet */ | |
3707 | return NET_RX_DROP; | |
3708 | } | |
3709 | ||
3710 | return NET_RX_SUCCESS; | |
3711 | } | |
3712 | ||
122edaa0 ML |
3713 | /** |
3714 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3715 | * @bat_priv: the bat priv with all the soft interface information | |
3716 | * @src: mac address of tt tvlv sender | |
3717 | * @dst: mac address of tt tvlv recipient | |
3718 | * @tvlv_value: tvlv buffer containing the tt data | |
3719 | * @tvlv_value_len: tvlv buffer length | |
3720 | * | |
62fe710f | 3721 | * Return: NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS |
122edaa0 ML |
3722 | * otherwise. |
3723 | */ | |
3724 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
6b5e971a | 3725 | u8 *src, u8 *dst, |
122edaa0 | 3726 | void *tvlv_value, |
6b5e971a | 3727 | u16 tvlv_value_len) |
122edaa0 ML |
3728 | { |
3729 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3730 | struct batadv_orig_node *orig_node = NULL; | |
3731 | ||
3732 | /* If this node is not the intended recipient of the | |
3733 | * roaming advertisement the packet is forwarded | |
3734 | * (the tvlv API will re-route the packet). | |
3735 | */ | |
3736 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3737 | return NET_RX_DROP; | |
3738 | ||
122edaa0 ML |
3739 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3740 | goto out; | |
3741 | ||
3742 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3743 | if (!orig_node) | |
3744 | goto out; | |
3745 | ||
3746 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3747 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3748 | ||
3749 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3750 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3751 | src, roaming_adv->client); | |
3752 | ||
3753 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3754 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3755 | atomic_read(&orig_node->last_ttvn) + 1); |
3756 | ||
3757 | out: | |
3758 | if (orig_node) | |
3759 | batadv_orig_node_free_ref(orig_node); | |
3760 | return NET_RX_SUCCESS; | |
3761 | } | |
3762 | ||
e1bf0c14 ML |
3763 | /** |
3764 | * batadv_tt_init - initialise the translation table internals | |
3765 | * @bat_priv: the bat priv with all the soft interface information | |
3766 | * | |
62fe710f | 3767 | * Return: 0 on success or negative error number in case of failure. |
e1bf0c14 ML |
3768 | */ |
3769 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3770 | { | |
3771 | int ret; | |
3772 | ||
0eb01568 AQ |
3773 | /* synchronized flags must be remote */ |
3774 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3775 | ||
e1bf0c14 ML |
3776 | ret = batadv_tt_local_init(bat_priv); |
3777 | if (ret < 0) | |
3778 | return ret; | |
3779 | ||
3780 | ret = batadv_tt_global_init(bat_priv); | |
3781 | if (ret < 0) | |
3782 | return ret; | |
3783 | ||
3784 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3785 | batadv_tt_tvlv_unicast_handler_v1, |
3786 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3787 | |
122edaa0 ML |
3788 | batadv_tvlv_handler_register(bat_priv, NULL, |
3789 | batadv_roam_tvlv_unicast_handler_v1, | |
3790 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3791 | ||
e1bf0c14 ML |
3792 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3793 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3794 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3795 | ||
3796 | return 1; | |
3797 | } | |
42cb0bef AQ |
3798 | |
3799 | /** | |
3800 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3801 | * @bat_priv: the bat priv with all the soft interface information | |
3802 | * @addr: the mac address of the client | |
3803 | * @vid: the identifier of the VLAN where this client is connected | |
3804 | * | |
62fe710f | 3805 | * Return: true if the client is marked with the TT_CLIENT_ISOLA flag, false |
42cb0bef AQ |
3806 | * otherwise |
3807 | */ | |
3808 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
6b5e971a | 3809 | const u8 *addr, unsigned short vid) |
42cb0bef AQ |
3810 | { |
3811 | struct batadv_tt_global_entry *tt; | |
3812 | bool ret; | |
3813 | ||
3814 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3815 | if (!tt) | |
3816 | return false; | |
3817 | ||
3818 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3819 | ||
3820 | batadv_tt_global_entry_free_ref(tt); | |
3821 | ||
3822 | return ret; | |
3823 | } |